N-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS

OF REGISTERED MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number: 811-09819

STATE STREET INSTITUTIONAL INVESTMENT TRUST

(Exact name of registrant as specified in charter)

STATE STREET FINANCIAL CENTER

ONE LINCOLN STREET

BOSTON, MASSACHUSETTS 02111

(Address of principal executive offices)(Zip code)

(Name and Address of Agent for Service)	Copy to:
Joshua A. Weinberg, Esq. Managing Director and Managing Counsel SSGA Funds Management, Inc. One Lincoln Street Boston, Massachusetts 02111	Timothy W. Diggins, Esq. Ropes & Gray 800 Boylston Street Boston, Massachusetts 02110-2624

Registrant’s telephone number, including area code: (617) 662-1742

Date of fiscal year end: December 31

Date of reporting period: March 31, 2017

Item 1. Schedule of Investments.

Quarterly Report

31 March 2017

State Street Institutional Investment Trust

State Street Equity 500 Index Fund

State Street Equity 500 Index II Portfolio

State Street Aggregate Bond Index Fund

State Street Aggregate Bond Index Portfolio

State Street Global Equity ex-U.S. Index Fund

State Street Global Equity ex-U.S. Index Portfolio

State Street Small Mid/Cap Equity Index Fund

State Street Small Mid/Cap Equity Index Portfolio

State Street Disciplined U.S. Equity Fund

State Street Disciplined International Equity Fund

State Street Disciplined Global Equity Fund

State Street Emerging Markets Equity Index Fund

State Street Hedged International Developed Equity Index Fund

State Street Target Retirement Fund

State Street Target Retirement 2015 Fund

State Street Target Retirement 2020 Fund

State Street Target Retirement 2025 Fund

State Street Target Retirement 2030 Fund

State Street Target Retirement 2035 Fund

State Street Target Retirement 2040 Fund

State Street Target Retirement 2045 Fund

State Street Target Retirement 2050 Fund

State Street Target Retirement 2055 Fund

State Street Target Retirement 2060 Fund

State Street Asia Pacific Value Spotlight Fund

State Street European Value Spotlight Fund

State Street Global Value Spotlight Fund

State Street International Value Spotlight Fund

State Street U.S. Value Spotlight Fund

The information contained in this report is intended for the general information of shareholders of the Trust. This report is not authorized for distribution to prospective investors unless preceded or accompanied by a current Trust prospectus which contains important information concerning the Trust. You may obtain a current prospectus and SAI from the Distributor by calling 1-800-997-7327 or visiting www.ssgafunds.com. Please read the prospectus carefully before you invest.

State Street Institutional Investment Trust

Quarterly Report

March 31, 2017 (Unaudited)

Table of Contents

Schedules of Investments
State Street Equity 500 Index II Portfolio	1
State Street Aggregate Bond Index Portfolio	7
State Street Global Equity ex-U.S. Index Portfolio	36
State Street Small Mid/Cap Equity Index Portfolio	58
State Street Disciplined U.S. Equity Fund	85
State Street Disciplined International Equity Fund	88
State Street Disciplined Global Equity Portfolio	91
State Street Emerging Markets Equity Index Fund	94
State Street Hedged International Developed Equity Index Fund	106
State Street International Developed Equity Index Portfolio	110
State Street Target Retirement Fund	121
State Street Target Retirement 2015 Fund	123
State Street Target Retirement 2020 Fund	125
State Street Target Retirement 2025 Fund	127
State Street Target Retirement 2030 Fund	129
State Street Target Retirement 2035 Fund	131
State Street Target Retirement 2040 Fund	133
State Street Target Retirement 2045 Fund	134
State Street Target Retirement 2050 Fund	135
State Street Target Retirement 2055 Fund	136
State Street Target Retirement 2060 Fund	137
State Street Asia Pacific Value Spotlight Fund	138
State Street European Value Spotlight Fund	140
State Street Global Value Spotlight Fund	142
State Street International Value Spotlight Fund	145
State Street U.S Value Spotlight Fund	147
Notes to Schedules of Investments	149

The information contained in this report is intended for the general information of shareholders of the Trust. This report is not authorized for distribution to prospective investors unless preceded or accompanied by a current Trust prospectus which contains important information concerning the Trust. You may obtain a current prospectus and SAI from the Distributor by calling 1-800-997-7327 or visiting www.ssgafunds.com. Please read the prospectus carefully before you invest.

State Street Equity 500 Index Fund is a feeder fund that invests substantially all of its investable assets in a master fund, the State Street Equity 500 Index II Portfolio. The portfolio of investments for the State Street Equity 500 Index II Portfolio follows.

State Street Institutional Investment Trust

State Street Equity 500 Index II Portfolio

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – 96.9%
Consumer Discretionary – 12.0%
Advance Auto Parts, Inc.		7,000	$	1,037,820
Amazon.com, Inc.(a)		36,090		31,995,229
AutoNation, Inc.(a)		6,194		261,944
AutoZone, Inc.(a)		2,476		1,790,272
Bed Bath & Beyond, Inc.		14,415		568,816
Best Buy Co., Inc.		25,906		1,273,280
BorgWarner, Inc.		18,977		793,049
CarMax, Inc.(a)		18,103		1,072,060
Carnival Corp.		37,201		2,191,511
CBS Corp. Class B		33,142		2,298,729
Charter Communications, Inc. Class A(a)		19,500		6,382,740
Chipotle Mexican Grill, Inc.(a)		2,786		1,241,219
Coach, Inc.		26,628		1,100,535
Comcast Corp. Class A		430,166		16,169,940
D.R. Horton, Inc.		32,197		1,072,482
Darden Restaurants, Inc.		11,671		976,513
Delphi Automotive PLC		23,919		1,925,240
Discovery Communications, Inc. Class A(a)		14,403		418,983
Discovery Communications, Inc. Class C(a)		21,003		594,595
DISH Network Corp. Class A(a)		21,700		1,377,733
Dollar General Corp.		24,113		1,681,399
Dollar Tree, Inc.(a)		22,426		1,759,544
Expedia, Inc.		11,434		1,442,628
Foot Locker, Inc.		12,900		965,049
Ford Motor Co.		351,338		4,089,574
Gap, Inc.		20,834		506,058
Garmin, Ltd.		10,940		559,143
General Motors Co.		122,723		4,339,485
Genuine Parts Co.		14,089		1,301,964
Goodyear Tire & Rubber Co.		24,844		894,384
H&R Block, Inc.		19,664		457,188
Hanesbrands, Inc.		35,900		745,284
Harley-Davidson, Inc.		16,816		1,017,368
Hasbro, Inc.		10,697		1,067,775
Home Depot, Inc.		110,702		16,254,375
Interpublic Group of Cos., Inc.		37,666		925,454
Kohl’s Corp.		16,745		666,618
L Brands, Inc.		22,821		1,074,869
Leggett & Platt, Inc.		12,654		636,749
Lennar Corp. Class A		18,706		957,560
LKQ Corp.(a)		29,200		854,684
Lowe’s Cos., Inc.		78,350		6,441,153
Macy’s, Inc.		29,062		861,398
Marriott International, Inc. Class A		28,055		2,642,220
Mattel, Inc.		32,533		833,170
McDonald’s Corp.		74,310		9,631,319
Michael Kors Holdings, Ltd.(a)		15,614		595,050
Mohawk Industries, Inc.(a)		6,031		1,384,054
Netflix, Inc.(a)		38,904		5,750,400
Newell Brands, Inc.		42,841		2,020,810
News Corp. Class A		36,288		471,744
News Corp. Class B		11,400		153,900
NIKE, Inc. Class B		119,906		6,682,361
Nordstrom, Inc.		11,077		515,856
O’Reilly Automotive, Inc.(a)		8,180		2,207,291
Omnicom Group, Inc.		22,391		1,930,328
Priceline Group, Inc.(a)		4,453		7,926,206
PulteGroup, Inc.		28,262		665,570
PVH Corp.		7,549		781,095
Ralph Lauren Corp.		5,379		439,034
Ross Stores, Inc.		35,156		2,315,726
Royal Caribbean Cruises, Ltd.		15,900		1,559,949
Scripps Networks Interactive, Inc. Class A		9,072		710,973
Signet Jewelers, Ltd.		6,600		457,182
Staples, Inc.		61,799		541,977
Starbucks Corp.		131,930		7,703,393
Target Corp.		49,672		2,741,398
TEGNA, Inc.		20,322		520,650
Tiffany & Co.		10,199		971,965
Time Warner, Inc.		70,011		6,840,775
TJX Cos., Inc.		58,737		4,644,922
Tractor Supply Co.		12,426		857,021
TripAdvisor, Inc.(a)		10,842		467,941
Twenty-First Century Fox, Inc. Class A		94,200		3,051,138
Twenty-First Century Fox, Inc. Class B		46,300		1,471,414
Ulta Salon Cosmetics & Fragrance, Inc.(a)		5,600		1,597,288
Under Armour, Inc. Class A(a)		17,424		344,647
Under Armour, Inc. Class C(a)		17,575		321,622
VF Corp.		31,444		1,728,477
Viacom, Inc. Class B		32,981		1,537,574
Walt Disney Co.		132,152		14,984,715
Whirlpool Corp.		7,102		1,216,786
Wyndham Worldwide Corp.		10,253		864,225
Wynn Resorts, Ltd.		7,541		864,274
Yum! Brands, Inc.		29,802		1,904,348
				228,893,181
Consumer Staples – 9.0%
Altria Group, Inc.		176,129		12,579,133
Archer-Daniels-Midland Co.		50,832		2,340,305
Brown-Forman Corp. Class B		17,342		800,854
Campbell Soup Co.		18,382		1,052,186
Church & Dwight Co., Inc.		24,600		1,226,802
Clorox Co.		12,264		1,653,555
Coca-Cola Co.		351,100		14,900,684
Colgate-Palmolive Co.		79,823		5,842,245
Conagra Brands, Inc.		39,524		1,594,398
Constellation Brands, Inc. Class A		15,450		2,503,982
Costco Wholesale Corp.		39,755		6,666,516

See accompanying notes to schedules of investments.

1

State Street Institutional Investment Trust

State Street Equity 500 Index II Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Consumer Staples – (continued)
Coty, Inc. Class A		44,678	$	810,012
CVS Health Corp.		92,805		7,285,193
Dr. Pepper Snapple Group, Inc.		17,497		1,713,306
Estee Lauder Cos., Inc. Class A		21,141		1,792,545
General Mills, Inc.		51,942		3,065,097
Hershey Co.		13,267		1,449,420
Hormel Foods Corp.		25,602		886,597
J.M. Smucker Co.		11,105		1,455,643
Kellogg Co.		24,028		1,744,673
Kimberly-Clark Corp.		32,027		4,215,714
Kraft Heinz Co.		53,818		4,887,213
Kroger Co.		82,442		2,431,215
McCormick & Co., Inc.		10,892		1,062,515
Mead Johnson Nutrition Co.		17,550		1,563,354
Molson Coors Brewing Co. Class B		17,553		1,679,998
Mondelez International, Inc. Class A		138,015		5,945,686
Monster Beverage Corp.(a)		38,535		1,779,161
PepsiCo, Inc.		129,716		14,510,032
Philip Morris International, Inc.		141,012		15,920,255
Procter & Gamble Co.		232,526		20,892,461
Reynolds American, Inc.		74,508		4,695,494
Sysco Corp.		44,274		2,298,706
Tyson Foods, Inc. Class A		25,244		1,557,807
Wal-Mart Stores, Inc.		136,603		9,846,344
Walgreens Boots Alliance, Inc.		77,105		6,403,570
Whole Foods Market, Inc.		30,279		899,892
				171,952,563
Energy – 6.4%
Anadarko Petroleum Corp.		50,082		3,105,084
Apache Corp.		36,055		1,852,866
Baker Hughes, Inc.		40,179		2,403,508
Cabot Oil & Gas Corp.		44,178		1,056,296
Chesapeake Energy Corp.(a)		70,788		420,481
Chevron Corp.		172,112		18,479,665
Cimarex Energy Co.		9,058		1,082,340
Concho Resources, Inc.(a)		13,900		1,783,926
ConocoPhillips		111,527		5,561,851
Devon Energy Corp.		49,701		2,073,526
EOG Resources, Inc.		52,071		5,079,526
EQT Corp.		16,457		1,005,523
Exxon Mobil Corp.		377,575		30,964,926
Halliburton Co.		77,967		3,836,756
Helmerich & Payne, Inc.		10,226		680,745
Hess Corp.		25,357		1,222,461
Kinder Morgan, Inc.		172,550		3,751,237
Marathon Oil Corp.		80,488		1,271,710
Marathon Petroleum Corp.		46,974		2,374,066
Murphy Oil Corp.		15,379		439,686
National Oilwell Varco, Inc.		35,916		1,439,872
Newfield Exploration Co.(a)		18,715		690,771
Noble Energy, Inc.		40,725		1,398,497
Occidental Petroleum Corp.		68,809		4,359,738
ONEOK, Inc.		19,996		1,108,578
Phillips 66		39,573		3,134,973
Pioneer Natural Resources Co.		15,176		2,826,226
Range Resources Corp.		17,859		519,697
Schlumberger, Ltd.		126,450		9,875,745
Southwestern Energy Co.(a)		46,656		381,180
TechnipFMC PLC(a)		44,691		1,452,457
Tesoro Corp.		11,116		901,063
Transocean, Ltd.(a)		37,010		460,775
Valero Energy Corp.		40,323		2,673,012
Williams Cos., Inc.		77,458		2,291,982
				121,960,745
Financials – 13.9%
Affiliated Managers Group, Inc.		5,224		856,423
Aflac, Inc.		35,853		2,596,474
Allstate Corp.		32,639		2,659,752
American Express Co.		68,312		5,404,162
American International Group, Inc.		84,001		5,244,182
Ameriprise Financial, Inc.		13,644		1,769,354
Aon PLC		23,465		2,785,061
Arthur J Gallagher & Co.		16,900		955,526
Assurant, Inc.		5,385		515,183
Bank of America Corp.		912,005		21,514,198
Bank of New York Mellon Corp.		93,394		4,410,999
BB&T Corp.		72,531		3,242,136
Berkshire Hathaway, Inc. Class B(a)		172,884		28,816,305
BlackRock, Inc.		10,916		4,186,395
Capital One Financial Corp.		43,195		3,743,279
CBOE Holdings, Inc.		8,700		705,309
Charles Schwab Corp.		109,404		4,464,777
Chubb, Ltd.		42,053		5,729,721
Cincinnati Financial Corp.		14,209		1,026,884
Citigroup, Inc.		251,727		15,058,309
Citizens Financial Group, Inc.		48,600		1,679,130
CME Group, Inc.		30,563		3,630,884
Comerica, Inc.		16,327		1,119,706
Discover Financial Services		34,328		2,347,692
E*TRADE Financial Corp.(a)		26,042		908,605
Fifth Third Bancorp		71,762		1,822,755
Franklin Resources, Inc.		32,989		1,390,157
Goldman Sachs Group, Inc.		33,546		7,706,187
Hartford Financial Services Group, Inc.		35,867		1,724,127
Huntington Bancshares, Inc.		103,091		1,380,389
Intercontinental Exchange, Inc.		53,385		3,196,160
Invesco, Ltd.		38,811		1,188,781
JPMorgan Chase & Co.		325,143		28,560,561
KeyCorp		102,696		1,825,935
Leucadia National Corp.		30,827		801,502
Lincoln National Corp.		21,682		1,419,087
Loews Corp.		26,219		1,226,263
M&T Bank Corp.		13,663		2,114,076
Marsh & McLennan Cos., Inc.		46,219		3,415,122
MetLife, Inc.		98,070		5,180,057
Moody’s Corp.		15,832		1,773,817
Morgan Stanley		129,775		5,559,561
Nasdaq, Inc.		10,875		755,269
Navient Corp.		28,813		425,280
Northern Trust Corp.		20,196		1,748,570
People’s United Financial, Inc.		29,566		538,101

See accompanying notes to schedules of investments.

2

State Street Institutional Investment Trust

State Street Equity 500 Index II Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Financials – (continued)
PNC Financial Services Group, Inc.		43,875	$	5,275,530
Principal Financial Group, Inc.		25,365		1,600,785
Progressive Corp.		55,149		2,160,738
Prudential Financial, Inc.		38,702		4,128,729
Raymond James Financial, Inc.		12,800		976,128
Regions Financial Corp.		106,046		1,540,848
S&P Global, Inc.		23,168		3,028,984
State Street Corp.(b)		32,078		2,553,730
SunTrust Banks, Inc.		43,836		2,424,131
Synchrony Financial		68,576		2,352,157
T Rowe Price Group, Inc.		23,155		1,578,013
Torchmark Corp.		10,512		809,845
Travelers Cos., Inc.		25,006		3,014,223
Unum Group		22,005		1,031,814
US Bancorp		144,222		7,427,433
Wells Fargo & Co.		409,703		22,804,069
Willis Towers Watson PLC		12,176		1,593,717
XL Group, Ltd.		25,548		1,018,343
Zions Bancorp		19,395		814,590
				265,256,010
Health Care – 13.4%
Abbott Laboratories		156,349		6,943,459
AbbVie, Inc.		144,543		9,418,422
Aetna, Inc.		31,644		4,036,192
Agilent Technologies, Inc.		30,793		1,628,026
Alexion Pharmaceuticals, Inc.(a)		20,073		2,433,651
Allergan PLC		30,306		7,240,709
AmerisourceBergen Corp.		15,934		1,410,159
Amgen, Inc.		66,854		10,968,736
Anthem, Inc.		23,819		3,939,186
Baxter International, Inc.		43,279		2,244,449
Becton Dickinson and Co.		19,136		3,510,308
Biogen, Inc.(a)		19,484		5,327,315
Boston Scientific Corp.(a)		122,057		3,035,558
Bristol-Myers Squibb Co.		151,604		8,244,225
C.R. Bard, Inc.		6,335		1,574,501
Cardinal Health, Inc.		28,133		2,294,246
Celgene Corp.(a)		70,471		8,768,707
Centene Corp.(a)		16,200		1,154,412
Cerner Corp.(a)		25,837		1,520,507
Cigna Corp.		23,085		3,381,722
Cooper Cos., Inc.		4,600		919,494
Danaher Corp.		54,994		4,703,637
DaVita, Inc.(a)		15,028		1,021,453
DENTSPLY SIRONA, Inc.		21,934		1,369,559
Edwards Lifesciences Corp.(a)		18,810		1,769,457
Eli Lilly & Co.		87,918		7,394,783
Envision Healthcare Corp.(a)		11,174		685,190
Express Scripts Holding Co.(a)		54,367		3,583,329
Gilead Sciences, Inc.		118,352		8,038,468
HCA Holdings, Inc.(a)		25,700		2,287,043
Henry Schein, Inc.(a)		7,600		1,291,772
Hologic, Inc.(a)		26,400		1,123,320
Humana, Inc.		13,390		2,760,215
IDEXX Laboratories, Inc.(a)		8,500		1,314,185
Illumina, Inc.(a)		13,000		2,218,320
Incyte Corp.(a)		15,700		2,098,619
Intuitive Surgical, Inc.(a)		3,248		2,489,495
Johnson & Johnson		247,008		30,764,846
Laboratory Corp. of America Holdings(a)		9,775		1,402,419
Mallinckrodt PLC(a)		10,100		450,157
McKesson Corp.		18,924		2,805,672
Medtronic PLC		124,193		10,004,988
Merck & Co., Inc.		249,572		15,857,805
Mettler-Toledo International, Inc.(a)		2,500		1,197,275
Mylan NV(a)		43,702		1,703,941
Patterson Cos., Inc.		7,935		358,900
PerkinElmer, Inc.		10,386		603,011
Perrigo Co. PLC		13,586		901,975
Pfizer, Inc.		541,233		18,515,581
Quest Diagnostics, Inc.		13,142		1,290,413
Regeneron Pharmaceuticals, Inc.(a)		6,742		2,612,592
Stryker Corp.		27,794		3,659,080
Thermo Fisher Scientific, Inc.		35,212		5,408,563
UnitedHealth Group, Inc.		86,374		14,166,200
Universal Health Services, Inc. Class B		8,500		1,057,825
Varian Medical Systems, Inc.(a)		8,829		804,587
Vertex Pharmaceuticals, Inc.(a)		23,552		2,575,411
Waters Corp.(a)		7,650		1,195,771
Zimmer Biomet Holdings, Inc.		19,025		2,323,143
Zoetis, Inc.		43,820		2,338,673
				256,141,657
Industrials – 9.8%
3M Co.		54,129		10,356,502
Acuity Brands, Inc.		4,200		856,800
Alaska Air Group, Inc.		11,700		1,078,974
Allegion PLC		9,096		688,567
American Airlines Group, Inc.		44,700		1,890,810
AMETEK, Inc.		21,999		1,189,706
Arconic, Inc.		41,686		1,098,009
Boeing Co.		51,664		9,137,295
C.H. Robinson Worldwide, Inc.		13,479		1,041,792
Caterpillar, Inc.		52,924		4,909,230
Cintas Corp.		8,166		1,033,326
CSX Corp.		83,355		3,880,175
Cummins, Inc.		14,614		2,209,637
Deere & Co.		26,183		2,850,281
Delta Air Lines, Inc.		65,434		3,007,347
Dover Corp.		14,750		1,185,163
Dun & Bradstreet Corp.		3,455		372,933
Eaton Corp. PLC		40,225		2,982,684
Emerson Electric Co.		57,879		3,464,637
Equifax, Inc.		11,388		1,557,195
Expeditors International of Washington, Inc.		17,176		970,272
Fastenal Co.		27,458		1,414,087
FedEx Corp.		22,050		4,303,058
Flowserve Corp.		12,345		597,745
Fluor Corp.		13,204		694,794
Fortive Corp.		28,597		1,722,111
Fortune Brands Home & Security, Inc.		14,700		894,495

See accompanying notes to schedules of investments.

3

State Street Institutional Investment Trust

State Street Equity 500 Index II Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Industrials – (continued)
General Dynamics Corp.		25,672	$	4,805,798
General Electric Co.		793,888		23,657,862
Honeywell International, Inc.		68,978		8,613,283
Illinois Tool Works, Inc.		28,000		3,709,160
Ingersoll-Rand PLC		24,584		1,999,171
Jacobs Engineering Group, Inc.		11,443		632,569
JB Hunt Transport Services, Inc.		8,300		761,442
Johnson Controls International PLC		84,308		3,551,053
Kansas City Southern		10,196		874,409
L3 Technologies, Inc.		7,338		1,212,898
Lockheed Martin Corp.		22,571		6,040,000
Masco Corp.		31,184		1,059,944
Nielsen Holdings PLC		31,925		1,318,822
Norfolk Southern Corp.		25,987		2,909,764
Northrop Grumman Corp.		15,725		3,740,034
PACCAR, Inc.		31,239		2,099,261
Parker-Hannifin Corp.		12,689		2,034,301
Pentair PLC		15,904		998,453
Quanta Services, Inc.(a)		14,407		534,644
Raytheon Co.		26,346		4,017,765
Republic Services, Inc.		21,989		1,381,129
Robert Half International, Inc.		12,266		598,949
Rockwell Automation, Inc.		12,226		1,903,710
Rockwell Collins, Inc.		12,331		1,198,080
Roper Technologies, Inc.		9,665		1,995,726
Ryder System, Inc.		5,066		382,179
Snap-on, Inc.		5,540		934,432
Southwest Airlines Co.		55,059		2,959,972
Stanley Black & Decker, Inc.		14,357		1,907,615
Stericycle, Inc.(a)		8,096		671,077
Textron, Inc.		25,633		1,219,874
TransDigm Group, Inc.		4,800		1,056,768
Union Pacific Corp.		73,698		7,806,092
United Continental Holdings, Inc.(a)		27,400		1,935,536
United Parcel Service, Inc. Class B		62,391		6,694,554
United Rentals, Inc.(a)		8,000		1,000,400
United Technologies Corp.		67,851		7,613,561
Verisk Analytics, Inc.(a)		14,800		1,200,872
W.W. Grainger, Inc.		5,157		1,200,343
Waste Management, Inc.		36,135		2,634,964
Xylem, Inc.		17,058		856,653
				187,110,744
Information Technology – 21.4%
Accenture PLC Class A		56,318		6,751,402
Activision Blizzard, Inc.		62,000		3,091,320
Adobe Systems, Inc.(a)		44,744		5,822,537
Advanced Micro Devices, Inc.(a)		66,400		966,120
Akamai Technologies, Inc.(a)		16,490		984,453
Alliance Data Systems Corp.		4,896		1,219,104
Alphabet, Inc. Class A(a)		27,067		22,947,403
Alphabet, Inc. Class C(a)		26,887		22,304,380
Amphenol Corp. Class A		27,320		1,944,364
Analog Devices, Inc.		32,552		2,667,636
Apple, Inc.		478,124		68,687,294
Applied Materials, Inc.		97,054		3,775,401
Autodesk, Inc.(a)		18,606		1,608,861
Automatic Data Processing, Inc.		40,452		4,141,880
Broadcom, Ltd.		36,291		7,946,277
CA, Inc.		29,740		943,353
Cisco Systems, Inc.		455,190		15,385,422
Citrix Systems, Inc.(a)		14,789		1,233,255
Cognizant Technology Solutions Corp. Class A(a)		54,541		3,246,280
Corning, Inc.		82,626		2,230,902
CSRA, Inc.		13,812		404,553
eBay, Inc.(a)		90,545		3,039,596
Electronic Arts, Inc.(a)		27,479		2,459,920
F5 Networks, Inc.(a)		6,241		889,779
Facebook, Inc. Class A(a)		214,393		30,454,526
Fidelity National Information Services, Inc.		29,291		2,332,149
Fiserv, Inc.(a)		19,062		2,198,039
FLIR Systems, Inc.		12,961		470,225
Global Payments, Inc.		14,576		1,175,992
Harris Corp.		11,802		1,313,208
Hewlett Packard Enterprise Co.		149,453		3,542,036
HP, Inc.		151,253		2,704,404
Intel Corp.		429,636		15,496,970
International Business Machines Corp.		77,995		13,582,049
Intuit, Inc.		21,737		2,521,275
Juniper Networks, Inc.		36,149		1,006,027
KLA-Tencor Corp.		14,832		1,410,078
Lam Research Corp.		15,477		1,986,628
MasterCard, Inc. Class A		85,451		9,610,674
Microchip Technology, Inc.		20,483		1,511,236
Micron Technology, Inc.(a)		92,434		2,671,343
Microsoft Corp.		703,958		46,362,674
Motorola Solutions, Inc.		15,772		1,359,862
NetApp, Inc.		26,114		1,092,871
NVIDIA Corp.		53,244		5,799,869
Oracle Corp.		272,135		12,139,942
Paychex, Inc.		28,207		1,661,392
PayPal Holdings, Inc.(a)		101,145		4,351,258
Qorvo, Inc.(a)		12,100		829,576
QUALCOMM, Inc.		133,726		7,667,849
Red Hat, Inc.(a)		17,070		1,476,555
salesforce.com, Inc.(a)		59,095		4,874,746
Seagate Technology PLC		28,024		1,287,142
Skyworks Solutions, Inc.		17,700		1,734,246
Symantec Corp.		59,260		1,818,097
Synopsys, Inc.(a)		14,500		1,045,885
TE Connectivity, Ltd.		31,651		2,359,582
Teradata Corp.(a)		12,307		382,994
Texas Instruments, Inc.		90,493		7,290,116
Total System Services, Inc.		15,676		838,039
VeriSign, Inc.(a)		8,601		749,233
Visa, Inc. Class A		168,860		15,006,588
Western Digital Corp.		27,153		2,240,937
Western Union Co.		46,045		937,016
Xerox Corp.		80,909		593,872
Xilinx, Inc.		23,960		1,387,044
Yahoo!, Inc.(a)		78,882		3,660,914
				407,626,650

See accompanying notes to schedules of investments.

4

State Street Institutional Investment Trust

State Street Equity 500 Index II Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Materials – 2.7%
Air Products & Chemicals, Inc.		19,402	$	2,624,897
Albemarle Corp.		10,700		1,130,348
Alcoa Corp.		1		34
Avery Dennison Corp.		8,470		682,682
Ball Corp.		16,566		1,230,191
CF Industries Holdings, Inc.		22,120		649,222
Dow Chemical Co.		100,938		6,413,601
E.I. du Pont de Nemours & Co.		78,218		6,283,252
Eastman Chemical Co.		13,936		1,126,029
Ecolab, Inc.		23,501		2,945,615
FMC Corp.		12,678		882,262
Freeport-McMoRan, Inc.(a)		117,040		1,563,655
International Flavors & Fragrances, Inc.		7,551		1,000,734
International Paper Co.		39,103		1,985,650
LyondellBasell Industries NV Class A		29,448		2,685,363
Martin Marietta Materials, Inc.		6,045		1,319,321
Monsanto Co.		39,461		4,466,985
Mosaic Co.		33,284		971,227
Newmont Mining Corp.		50,433		1,662,272
Nucor Corp.		30,248		1,806,411
PPG Industries, Inc.		22,954		2,412,006
Praxair, Inc.		25,511		3,025,605
Sealed Air Corp.		18,323		798,516
Sherwin-Williams Co.		7,209		2,236,160
Vulcan Materials Co.		12,571		1,514,554
WestRock Co.		23,836		1,240,187
				52,656,779
Real Estate – 2.9%
Alexandria Real Estate Equities, Inc.		7,600		839,952
American Tower Corp. REIT		38,518		4,681,478
Apartment Investment & Management Co. Class A REIT		14,887		660,239
AvalonBay Communities, Inc. REIT		12,269		2,252,588
Boston Properties, Inc. REIT		14,646		1,939,277
CBRE Group, Inc. Class A(a)		28,467		990,367
Crown Castle International Corp. REIT		32,258		3,046,768
Digital Realty Trust, Inc. REIT		15,100		1,606,489
Equinix, Inc. REIT		6,743		2,699,695
Equity Residential REIT		34,719		2,160,216
Essex Property Trust, Inc. REIT		6,245		1,445,905
Extra Space Storage, Inc. REIT		12,000		892,680
Federal Realty Investment Trust REIT		6,800		907,800
GGP, Inc. REIT		55,458		1,285,516
HCP, Inc. REIT		44,423		1,389,551
Host Hotels & Resorts, Inc. REIT		70,262		1,311,089
Iron Mountain, Inc. REIT		23,281		830,433
Kimco Realty Corp. REIT		40,353		891,398
Macerich Co. REIT		11,455		737,702
Mid-America Apartment Communities, Inc. REIT		10,800		1,098,792
Prologis, Inc. REIT		47,152		2,446,246
Public Storage REIT		13,335		2,919,165
Realty Income Corp. REIT		23,800		1,416,814
Regency Centers Corp.		12,500		829,875
Simon Property Group, Inc. REIT		28,880		4,968,226
SL Green Realty Corp. REIT		9,600		1,023,552
UDR, Inc. REIT		25,400		921,004
Ventas, Inc. REIT		33,597		2,185,149
Vornado Realty Trust REIT		16,368		1,641,874
Welltower, Inc. REIT		32,319		2,288,832
Weyerhaeuser Co. REIT		66,687		2,266,024
				54,574,696
Telecommunication Services – 2.3%
AT&T, Inc.		558,887		23,221,755
CenturyLink, Inc.		51,892		1,223,094
Level 3 Communications, Inc.(a)		27,700		1,584,994
Verizon Communications, Inc.		370,715		18,072,356
				44,102,199
Utilities – 3.1%
AES Corp.		62,636		700,271
Alliant Energy Corp.		21,600		855,576
Ameren Corp.		23,004		1,255,788
American Electric Power Co., Inc.		44,009		2,954,324
American Water Works Co., Inc.		16,900		1,314,313
CenterPoint Energy, Inc.		40,876		1,126,951
CMS Energy Corp.		26,555		1,188,071
Consolidated Edison, Inc.		27,152		2,108,624
Dominion Resources, Inc.		56,594		4,389,997
DTE Energy Co.		17,045		1,740,465
Duke Energy Corp.		63,192		5,182,376
Edison International		29,014		2,309,805
Entergy Corp.		16,998		1,291,168
Eversource Energy		30,117		1,770,277
Exelon Corp.		82,984		2,985,764
FirstEnergy Corp.		40,393		1,285,305
NextEra Energy, Inc.		42,264		5,425,430
NiSource, Inc.		30,704		730,448
NRG Energy, Inc.		30,002		561,037
PG&E Corp.		45,414		3,013,673
Pinnacle West Capital Corp.		10,604		884,162
PPL Corp.		60,519		2,262,805
Public Service Enterprise Group, Inc.		48,088		2,132,703
SCANA Corp.		13,599		888,695
Sempra Energy		22,362		2,471,001
Southern Co.		89,259		4,443,313
WEC Energy Group, Inc.		29,982		1,817,809
Xcel Energy, Inc.		45,051		2,002,517
				59,092,668
TOTAL COMMON STOCKS (Cost $1,485,348,759)				1,849,367,892

See accompanying notes to schedules of investments.

5

State Street Institutional Investment Trust

State Street Equity 500 Index II Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
SHORT-TERM INVESTMENT – 2.7%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(c)(d) (Cost $51,088,212)		51,088,212	$	51,088,212
TOTAL INVESTMENTS – 99.6% (Cost $1,536,436,971)				1,900,456,104
Other Assets in Excess of Liabilities – 0.4%				7,198,080
NET ASSETS – 100.0%			$	1,907,654,184

^(a)  Non-income producing security.

^(b) The Fund invested in an affiliated entity, State Street Corp. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(c)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(d)  The rate shown is the annualized seven-day yield at March 31, 2017.

REIT Real Estate Investment Trust

At March 31, 2017, open futures contracts purchased were as follows:

Futures Contracts	Expiration Date		Number of Contracts		Notional Value		Unrealized Depreciation
E-Mini S&P 500 Index (long)		06/16/2017		488	$	57,564,480	$	(43,882	)

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices			Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Common Stocks
Consumer Discretionary	$	228,893,181		$	–	$	–	$	228,893,181
Consumer Staples		171,952,563			–		–		171,952,563
Energy		121,960,745			–		–		121,960,745
Financials		265,256,010			–		–		265,256,010
Health Care		256,141,657			–		–		256,141,657
Industrials		187,110,744			–		–		187,110,744
Information Technology		407,626,650			–		–		407,626,650
Materials		52,656,779			–		–		52,656,779
Real Estate		54,574,696			–		–		54,574,696
Telecommunication Services		44,102,199			–		–		44,102,199
Utilities		59,092,668			–		–		59,092,668
Short-Term Investment		51,088,212			–		–		51,088,212
Total Investments	$	1,900,456,104		$	–	$	–	$	1,900,456,104
Liabilities:
Other Financial Instruments:
Futures Contracts (a)	$	(43,882	)	$	–	$	–	$	(43,882	)
Total Other Financial Instruments	$	(43,882	)	$	–	$	–	$	(43,882	)

^(a)  Futures Contracts are valued at unrealized appreciation (depreciation).

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income		Realized gain (loss)
State Street Corp.		23,278	$	1,809,166		11,200		2,400		32,078	$	2,553,730	$	12,190	$	57,650
State Street Institutional U.S. Government Money Market Fund, Premier Class		30,381,182		30,381,182		455,186,831		434,479,801		51,088,212		51,088,212		–		–
TOTAL			$	32,190,348							$	53,641,942	$	12,190	$	57,650

See accompanying notes to schedules of investments.

6

State Street Aggregate Bond Index Fund is a feeder fund that invests substantially all of its investable assets in a master fund, the State Street Aggregate Bond Index Portfolio. The portfolio of investments for the Aggregate Bond Index Portfolio follows.

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – 25.9%
Advertising – 0.0%(a)
Interpublic Group of Cos., Inc. 4.20%, 4/15/2024	$	25,000	$	25,755
Omnicom Group, Inc. 3.60%, 4/15/2026		100,000		99,832
WPP Finance 2010 3.63%, 9/7/2022		25,000		25,529
				151,116
Aerospace & Defense – 0.4%
Boeing Co.:
0.95%, 5/15/2018		25,000		24,863
2.60%, 10/30/2025		35,000		33,986
3.38%, 6/15/2046		25,000		22,694
Embraer Netherlands Finance B.V. 5.05%, 6/15/2025		50,000		51,388
General Dynamics Corp. 2.25%, 11/15/2022		25,000		24,599
Harris Corp. 3.83%, 4/27/2025		50,000		50,919
L-3 Technologies, Inc. 4.95%, 2/15/2021		25,000		26,829
L3 Technologies, Inc. 3.85%, 12/15/2026		50,000		50,752
Lockheed Martin Corp.:
2.50%, 11/23/2020		100,000		100,764
3.55%, 1/15/2026		100,000		101,588
3.60%, 3/1/2035		50,000		47,688
4.70%, 5/15/2046		110,000		118,761
Northrop Grumman Corp.:
3.25%, 8/1/2023		50,000		51,064
4.75%, 6/1/2043		25,000		26,955
Raytheon Co.:
3.13%, 10/15/2020		25,000		25,839
4.20%, 12/15/2044		25,000		25,867
Rockwell Collins, Inc.:
2.80%, 3/15/2022		50,000		50,140
3.50%, 3/15/2027		36,000		36,039
Textron, Inc. 4.00%, 3/15/2026		50,000		50,937
United Technologies Corp.:
1.78%, 5/4/2018(b)		75,000		75,002
1.95%, 11/1/2021		150,000		147,016
2.65%, 11/1/2026		50,000		48,080
4.50%, 6/1/2042		250,000		264,390
6.13%, 7/15/2038		50,000		63,524
				1,519,684
Agriculture – 0.3%
Altria Group, Inc.:
2.63%, 1/14/2020		150,000		151,866
4.00%, 1/31/2024		25,000		26,217
4.50%, 5/2/2043		25,000		25,348
Archer-Daniels-Midland Co. 4.02%, 4/16/2043	$	50,000	$	49,370
Philip Morris International, Inc.:
1.63%, 2/21/2019		100,000		99,649
1.88%, 1/15/2019		50,000		50,105
2.13%, 5/10/2023		75,000		71,480
2.63%, 2/18/2022		25,000		24,972
2.75%, 2/25/2026		125,000		120,172
4.13%, 3/4/2043		25,000		24,092
4.50%, 3/26/2020		25,000		26,669
4.50%, 3/20/2042		50,000		50,894
Reynolds American, Inc.:
2.30%, 6/12/2018		100,000		100,599
4.00%, 6/12/2022		50,000		52,448
5.70%, 8/15/2035		25,000		28,615
5.85%, 8/15/2045		175,000		205,481
				1,107,977
Airlines – 0.0%(a)
American Airlines 2014-1 Pass Through Trust, Class A Series A, 3.70%, 4/1/2028		22,135		22,213
Delta Air Lines, Inc. 2.88%, 3/13/2020		100,000		101,000
Southwest Airlines Co. 2.75%, 11/6/2019		25,000		25,375
United Airlines 2016-1 Pass Through Trust Class AA Series AA, 3.10%, 1/7/2030		50,000		49,098
				197,686
Apparel – 0.0%(a)
NIKE, Inc.:
2.38%, 11/1/2026		50,000		46,769
3.88%, 11/1/2045		30,000		28,898
				75,667
Auto Manufacturers – 0.6%
American Honda Finance Corp.:
1.50%, 11/19/2018		50,000		49,852
Series MTN, 2.25%, 8/15/2019		25,000		25,218
Series MTN, 2.45%, 9/24/2020		75,000		75,726
Series MTN, 2.90%, 2/16/2024		50,000		49,931
Ford Motor Co.:
4.35%, 12/8/2026		100,000		101,957
4.75%, 1/15/2043		50,000		46,882
5.29%, 12/8/2046		100,000		100,081
Ford Motor Credit Co. LLC:
2.02%, 5/3/2019		150,000		149,391
2.68%, 1/9/2020		300,000		301,881
3.10%, 5/4/2023		100,000		97,563
3.34%, 3/18/2021		150,000		151,725

See accompanying notes to schedules of investments.

7

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Auto Manufacturers – (continued)
Series GMTN, 4.39%, 1/8/2026	$	100,000	$	102,064
General Motors Co.:
3.50%, 10/2/2018		25,000		25,539
6.60%, 4/1/2036		100,000		115,114
6.75%, 4/1/2046		25,000		29,319
General Motors Financial Co., Inc.:
2.40%, 5/9/2019		200,000		200,634
3.15%, 1/15/2020		35,000		35,570
3.20%, 7/13/2020		25,000		25,431
3.20%, 7/6/2021		100,000		100,453
3.45%, 1/14/2022		50,000		50,334
3.70%, 5/9/2023		100,000		100,435
4.00%, 1/15/2025		35,000		35,135
4.35%, 1/17/2027		35,000		35,343
5.25%, 3/1/2026		100,000		107,428
Toyota Motor Credit Corp.:
Series GMTN, 1.90%, 4/8/2021		275,000		270,531
Series GMTN, 2.80%, 7/13/2022		25,000		25,180
Series MTN, 1.40%, 5/20/2019		75,000		74,392
Series MTN, 1.70%, 2/19/2019		25,000		25,024
Series MTN, 2.10%, 1/17/2019		50,000		50,422
				2,558,555
Auto Parts & Equipment – 0.0%(a)
Delphi Automotive PLC:
4.25%, 1/15/2026		25,000		26,180
4.40%, 10/1/2046		30,000		28,594
Lear Corp. 5.25%, 1/15/2025		20,000		21,100
				75,874
Banks – 5.8%
Australia & New Zealand Banking Group, Ltd. Series MTN, 2.30%, 6/1/2021		100,000		98,748
Banco Bilbao Vizcaya Argentaria SA 3.00%, 10/20/2020		25,000		25,309
Bank of America Corp.:
5.70%, 1/24/2022		50,000		56,224
6.11%, 1/29/2037		75,000		87,764
Series GMTN, 2.63%, 4/19/2021		600,000		598,890
Series GMTN, 3.50%, 4/19/2026		130,000		128,511
Series L, 2.60%, 1/15/2019		50,000		50,529
Series L, 2.65%, 4/1/2019		300,000		303,597
Series L, 3.95%, 4/21/2025		50,000		49,776
Series MTN, 2.50%, 10/21/2022		50,000		48,701
Series MTN, 3.25%, 10/21/2027		400,000		380,452
Series MTN, 4.00%, 4/1/2024		50,000		51,824
Series MTN, 4.13%, 1/22/2024		25,000		26,100
Series MTN, 4.20%, 8/26/2024		50,000		51,002
Series MTN, 3 month USD LIBOR + 1.99%, 4.44%, 1/20/2048(c)		50,000		50,265
Series MTN, 4.88%, 4/1/2044		50,000		53,757
Series MTN, 5.00%, 5/13/2021		50,000		54,279
Series MTN, 5.63%, 7/1/2020		50,000		54,807
Bank of Montreal:
1.40%, 4/10/2018		25,000		24,960
Series MTN, 1.45%, 4/9/2018		25,000		24,972
Series MTN, 1.90%, 8/27/2021		50,000		48,708
Series MTN, 2.55%, 11/6/2022		30,000		29,739
Bank of New York Mellon Corp.:
Series G, 2.15%, 2/24/2020		100,000		100,106
Series G, 3.00%, 2/24/2025		100,000		98,967
Series MTN, 2.05%, 5/3/2021		50,000		49,201
Series MTN, 2.20%, 3/4/2019		25,000		25,184
Series MTN, 2.20%, 8/16/2023		200,000		191,892
Bank of Nova Scotia:
2.35%, 10/21/2020		100,000		100,077
2.70%, 3/7/2022		100,000		100,346
Series BKNT, 1.95%, 1/15/2019		100,000		100,214
Series BKNT, 2.45%, 3/22/2021		200,000		199,708
Barclays Bank PLC 5.14%, 10/14/2020		100,000		106,872
Barclays PLC:
3.20%, 8/10/2021		200,000		200,506
4.38%, 1/12/2026		50,000		50,733
5.20%, 5/12/2026		75,000		76,879
5.25%, 8/17/2045		25,000		26,189
BB&T Corp.:
Series MTN, 2.25%, 2/1/2019		25,000		25,177
Series MTN, 2.63%, 6/29/2020		50,000		50,510

See accompanying notes to schedules of investments.

8

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Banks – (continued)
BNP Paribas SA:
Series BKNT, 5.00%, 1/15/2021	$	100,000	$	108,122
Series MTN, 2.70%, 8/20/2018		50,000		50,512
BPCE SA Series MTN, 2.50%, 7/15/2019		100,000		100,443
Branch Banking & Trust Co.:
2.10%, 1/15/2020		250,000		250,290
3.63%, 9/16/2025		25,000		25,575
Series BKNT, 1.45%, 5/10/2019		50,000		49,502
Capital One Financial Corp.:
2.45%, 4/24/2019		50,000		50,271
3.75%, 7/28/2026		125,000		121,119
Capital One NA/Mclean:
2.35%, 8/17/2018		50,000		50,273
Series BKNT, 1.85%, 9/13/2019		250,000		247,717
Series BKNT, 2.95%, 7/23/2021		75,000		75,545
Citigroup, Inc.:
1.70%, 4/27/2018		100,000		99,926
2.05%, 6/7/2019		300,000		299,685
2.35%, 8/2/2021		50,000		49,191
2.50%, 9/26/2018		50,000		50,416
2.55%, 4/8/2019		50,000		50,490
2.70%, 3/30/2021		175,000		175,178
2.90%, 12/8/2021		250,000		250,783
3.20%, 10/21/2026		300,000		287,274
3.75%, 6/16/2024		25,000		25,484
4.30%, 11/20/2026		50,000		50,459
4.45%, 9/29/2027		150,000		152,031
4.65%, 7/30/2045		25,000		25,997
5.30%, 5/6/2044		50,000		53,480
6.68%, 9/13/2043		175,000		222,026
Citizens Bank NA/Providence Series BKNT, 2.50%, 3/14/2019		50,000		50,363
Commonwealth Bank of Australia Series GMTN, 2.55%, 3/15/2021		100,000		99,963
Cooperatieve Rabobank UA:
2.25%, 1/14/2019		50,000		50,310
3.88%, 2/8/2022		50,000		52,719
4.38%, 8/4/2025		250,000		255,990
4.50%, 1/11/2021		50,000		53,573
5.75%, 12/1/2043		50,000		57,434
Series GMTN, 2.50%, 1/19/2021		300,000		300,153
Credit Suisse AG 5.30%, 8/13/2019		100,000		107,207
Credit Suisse Group Funding Guernsey, Ltd.:
3.13%, 12/10/2020		450,000		451,863
3.80%, 6/9/2023		150,000		150,627
Deutsche Bank AG:
2.50%, 2/13/2019		75,000		75,088
2.95%, 8/20/2020		50,000		50,086
3.70%, 5/30/2024		50,000		49,136
Discover Bank 3.45%, 7/27/2026		25,000		24,011
Fifth Third Bancorp 2.30%, 3/1/2019		50,000		50,303
Fifth Third Bank:
2.25%, 6/14/2021		50,000		49,344
Series BKNT, 3.85%, 3/15/2026		225,000		226,508
FMS Wertmanagement AoeR 1.00%, 8/16/2019		200,000		196,970
Goldman Sachs Group, Inc.:
2.00%, 4/25/2019		50,000		49,916
2.30%, 12/13/2019		50,000		50,018
2.35%, 11/15/2021		175,000		171,453
2.55%, 10/23/2019		25,000		25,207
2.63%, 1/31/2019		200,000		202,270
2.63%, 4/25/2021		150,000		149,484
2.75%, 9/15/2020		250,000		251,985
2.88%, 2/25/2021		25,000		25,186
2.90%, 7/19/2018		50,000		50,644
3.50%, 1/23/2025		50,000		49,743
3.50%, 11/16/2026		250,000		244,730
3.63%, 1/22/2023		25,000		25,596
3.75%, 2/25/2026		50,000		50,241
4.00%, 3/3/2024		50,000		51,838
4.75%, 10/21/2045		50,000		52,716
5.95%, 1/15/2027		50,000		57,179
6.25%, 2/1/2041		200,000		251,714
6.75%, 10/1/2037		150,000		185,070
Series MTN, 4.80%, 7/8/2044		50,000		52,901
HSBC Holdings PLC:
2.65%, 1/5/2022		325,000		320,772
2.95%, 5/25/2021		250,000		251,250
4.30%, 3/8/2026		250,000		260,030
5.10%, 4/5/2021		50,000		54,231
6.50%, 9/15/2037		200,000		246,526
Huntington Bancshares, Inc.:
2.30%, 1/14/2022		25,000		24,357
2.60%, 8/2/2018		50,000		50,423
Industrial & Commercial Bank of China, Ltd. 3.23%, 11/13/2019		50,000		51,059
International Finance Corp. 1.75%, 9/16/2019		25,000		25,117
Intesa Sanpaolo SpA 5.25%, 1/12/2024		50,000		52,520
JPMorgan Chase & Co.:
1.63%, 5/15/2018		50,000		49,987
1.85%, 3/22/2019		350,000		350,105
2.25%, 1/23/2020		150,000		150,465
2.35%, 1/28/2019		50,000		50,489
2.40%, 6/7/2021		550,000		546,832
2.70%, 5/18/2023		125,000		122,490
2.95%, 10/1/2026		350,000		332,584
2.97%, 1/15/2023		50,000		49,966

See accompanying notes to schedules of investments.

9

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Banks – (continued)
3.38%, 5/1/2023	$	75,000	$	74,938
3.88%, 2/1/2024		50,000		51,956
4.13%, 12/15/2026		50,000		50,901
4.25%, 10/1/2027		80,000		82,018
4.85%, 2/1/2044		50,000		55,313
4.95%, 6/1/2045		50,000		52,613
5.40%, 1/6/2042		50,000		58,059
5.50%, 10/15/2040		150,000		175,905
KeyBank NA Series MTN, 3.40%, 5/20/2026		25,000		24,342
KeyCorp.:
Series MTN, 2.30%, 12/13/2018		25,000		25,128
Series MTN, 2.90%, 9/15/2020		100,000		101,570
KFW:
1.00%, 6/11/2018		25,000		24,905
2.50%, 11/20/2024		50,000		50,299
Kreditanstalt fuer Wiederaufbau:
Zero Coupon, 6/29/2037		100,000		52,162
1.00%, 7/15/2019		100,000		98,720
1.50%, 2/6/2019		750,000		750,352
1.50%, 6/15/2021		700,000		685,783
1.88%, 4/1/2019		25,000		25,181
2.00%, 5/2/2025		100,000		96,439
2.13%, 1/17/2023		100,000		99,046
2.63%, 1/25/2022		50,000		51,102
4.50%, 7/16/2018		75,000		78,004
Landwirtschaftliche Rentenbank:
1.00%, 4/4/2018		50,000		49,870
2.00%, 1/13/2025		25,000		24,099
2.25%, 10/1/2021		50,000		50,237
Series GMTN, 1.75%, 7/27/2026		50,000		46,443
Lloyds Banking Group PLC:
3.00%, 1/11/2022		200,000		198,816
4.65%, 3/24/2026		100,000		102,178
Mitsubishi UFJ Financial Group, Inc.:
2.19%, 9/13/2021		50,000		48,853
2.76%, 9/13/2026		25,000		23,513
3.00%, 2/22/2022		50,000		50,374
3.68%, 2/22/2027		50,000		50,639
3.85%, 3/1/2026		25,000		25,665
Morgan Stanley:
2.13%, 4/25/2018		25,000		25,091
2.80%, 6/16/2020		50,000		50,567
3.63%, 1/20/2027		100,000		99,157
3.95%, 4/23/2027		25,000		24,741
4.30%, 1/27/2045		50,000		49,399
6.38%, 7/24/2042		65,000		82,896
Series GMTN, 2.38%, 7/23/2019		50,000		50,303
Series GMTN, 2.45%, 2/1/2019		550,000		554,730
Series GMTN, 2.50%, 4/21/2021		225,000		223,852
Series GMTN, 3.75%, 2/25/2023		50,000		51,626
Series GMTN, 3.88%, 1/27/2026		125,000		126,507
Series GMTN, 4.35%, 9/8/2026		50,000		51,027
Series MTN, 2.20%, 12/7/2018		50,000		50,212
Series MTN, 2.63%, 11/17/2021		250,000		248,325
Series MTN, 3.13%, 7/27/2026		225,000		214,789
National Australia Bank, Ltd.:
1.38%, 7/12/2019		50,000		49,228
1.88%, 7/12/2021		250,000		242,575
2.50%, 7/12/2026		50,000		46,793
Oesterreichische Kontrollbank AG:
1.13%, 5/29/2018		50,000		49,863
1.13%, 4/26/2019		25,000		24,736
1.63%, 3/12/2019		25,000		25,009
PNC Bank NA:
Series MTN, 2.15%, 4/29/2021		250,000		247,045
Series MTN, 2.40%, 10/18/2019		200,000		202,086
PNC Financial Services Group, Inc.:
3.30%, 3/8/2022		50,000		51,437
3.90%, 4/29/2024		50,000		51,815
Regions Financial Corp. 3.20%, 2/8/2021		25,000		25,415
Royal Bank of Canada:
2.00%, 12/10/2018		50,000		50,178
2.30%, 3/22/2021		125,000		124,987
Series GMTN, 2.13%, 3/2/2020		100,000		100,148
Series GMTN, 2.50%, 1/19/2021		100,000		100,650
Series GMTN, 1.63%, 4/15/2019		50,000		49,739
Series GMTN, 4.65%, 1/27/2026		100,000		106,072
Royal Bank of Scotland Group PLC 3.88%, 9/12/2023		75,000		73,875
Santander Holdings USA, Inc.:
3.70%, 3/28/2022(d)		60,000		60,244
4.50%, 7/17/2025		50,000		50,790
Santander UK Group Holdings PLC 2.88%, 10/16/2020		100,000		100,246
Santander UK PLC 3.05%, 8/23/2018		25,000		25,396
Skandinaviska Enskilda Banken AB 1.88%, 9/13/2021		50,000		48,445

See accompanying notes to schedules of investments.

10

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Banks – (continued)
Sumitomo Mitsui Banking Corp.:
1.97%, 1/11/2019	$	250,000	$	249,840
Series GMTN, 1.95%, 7/23/2018		100,000		100,051
Sumitomo Mitsui Financial Group, Inc.:
2.44%, 10/19/2021		70,000		69,094
2.93%, 3/9/2021		100,000		100,774
3.01%, 10/19/2026		50,000		47,938
3.78%, 3/9/2026		30,000		30,661
SunTrust Bank 2.25%, 1/31/2020		50,000		50,102
SunTrust Banks, Inc.:
2.35%, 11/1/2018		25,000		25,168
2.70%, 1/27/2022		50,000		49,834
Svenska Handelsbanken AB Series GMTN, 2.40%, 10/1/2020		75,000		74,995
Toronto-Dominion Bank:
1.45%, 8/13/2019		325,000		321,155
Series GMTN, 1.45%, 9/6/2018		50,000		49,879
Series GMTN, 1.75%, 7/23/2018		50,000		50,099
Series GMTN, 2.50%, 12/14/2020		50,000		50,384
Series MTN, 1.95%, 1/22/2019		50,000		50,207
UBS AG Series GMTN, 2.35%, 3/26/2020		100,000		100,141
US Bancorp:
Series MTN, 2.20%, 4/25/2019		25,000		25,185
Series MTN, 2.35%, 1/29/2021		100,000		100,118
Series MTN, 3.10%, 4/27/2026		50,000		49,118
Series MTN, 3.60%, 9/11/2024		25,000		25,702
US Bank NA Series BKNT, 1.40%, 4/26/2019		350,000		347,350
Wells Fargo & Co.:
2.10%, 7/26/2021		300,000		293,745
2.15%, 1/15/2019		25,000		25,147
2.50%, 3/4/2021		50,000		49,841
3.00%, 10/23/2026		250,000		239,305
4.13%, 8/15/2023		25,000		26,134
4.48%, 1/16/2024		25,000		26,631
5.61%, 1/15/2044		325,000		371,709
Series GMTN, 4.30%, 7/22/2027		50,000		51,936
Series MTN, 3.00%, 1/22/2021		50,000		50,897
Series MTN, 3.30%, 9/9/2024		150,000		150,096
Series MTN, 3.55%, 9/29/2025		50,000		50,282
Series MTN, 4.75%, 12/7/2046		150,000		153,420
Wells Fargo Bank NA Series MTN, 2.15%, 12/6/2019		300,000		300,978
Wells Fargo Capital 5.95%, 12/1/2086		25,000		26,878
Westpac Banking Corp.:
1.55%, 5/25/2018		100,000		99,898
2.25%, 1/17/2019		125,000		125,725
2.80%, 1/11/2022		100,000		100,578
2.85%, 5/13/2026		50,000		48,240
				25,466,658
Beverages – 0.8%
Anheuser-Busch InBev Finance, Inc.:
1.90%, 2/1/2019		350,000		350,291
2.15%, 2/1/2019		25,000		25,151
2.65%, 2/1/2021		155,000		156,079
3.30%, 2/1/2023		200,000		203,338
3.65%, 2/1/2026		250,000		252,418
4.70%, 2/1/2036		425,000		449,178
4.90%, 2/1/2046		175,000		188,911
Anheuser-Busch InBev Worldwide, Inc.:
2.50%, 7/15/2022		50,000		49,394
3.75%, 7/15/2042		50,000		45,726
Coca-Cola Co.:
1.15%, 4/1/2018		25,000		24,950
1.38%, 5/30/2019		275,000		273,686
1.55%, 9/1/2021		200,000		194,898
1.65%, 11/1/2018		25,000		25,102
2.25%, 9/1/2026		25,000		23,406
2.88%, 10/27/2025		25,000		24,757
3.20%, 11/1/2023		25,000		25,763
Coca-Cola Femsa SAB de CV 2.38%, 11/26/2018		100,000		100,616
Constellation Brands, Inc.:
3.75%, 5/1/2021		5,000		5,162
3.88%, 11/15/2019		5,000		5,201
4.25%, 5/1/2023		25,000		26,344
6.00%, 5/1/2022		5,000		5,674
Diageo Capital PLC 2.63%, 4/29/2023		75,000		74,428
Diageo Investment Corp. 4.25%, 5/11/2042		25,000		25,493
Dr Pepper Snapple Group, Inc. 3.13%, 12/15/2023		50,000		50,124
Molson Coors Brewing Co.:
2.10%, 7/15/2021		50,000		48,807
2.25%, 3/15/2020(d)		50,000		50,057
3.00%, 7/15/2026		50,000		47,490
4.20%, 7/15/2046		30,000		28,180
PepsiCo, Inc.:
1.50%, 2/22/2019		135,000		134,903
1.70%, 10/6/2021		150,000		146,034
1.85%, 4/30/2020		25,000		24,982

See accompanying notes to schedules of investments.

11

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Beverages – (continued)
2.15%, 10/14/2020	$	50,000	$	50,275
2.85%, 2/24/2026		85,000		83,578
3.45%, 10/6/2046		150,000		135,528
3.60%, 3/1/2024		25,000		26,235
4.45%, 4/14/2046		75,000		79,747
4.60%, 7/17/2045		25,000		27,082
				3,488,988
Biotechnology – 0.4%
Amgen, Inc.:
1.85%, 8/19/2021		200,000		194,214
2.20%, 5/22/2019		50,000		50,311
3.63%, 5/22/2024		100,000		102,603
4.40%, 5/1/2045		50,000		48,654
4.66%, 6/15/2051		225,000		224,779
6.38%, 6/1/2037		50,000		60,933
Biogen, Inc.:
2.90%, 9/15/2020		25,000		25,431
4.05%, 9/15/2025		50,000		51,777
5.20%, 9/15/2045		25,000		27,005
Celgene Corp.:
2.13%, 8/15/2018		50,000		50,185
2.88%, 8/15/2020		225,000		228,341
3.63%, 5/15/2024		25,000		25,332
3.88%, 8/15/2025		25,000		25,537
4.63%, 5/15/2044		50,000		49,496
Gilead Sciences, Inc.:
1.85%, 9/4/2018		50,000		50,145
1.95%, 3/1/2022		5,000		4,840
2.55%, 9/1/2020		250,000		252,515
2.95%, 3/1/2027		25,000		23,669
3.65%, 3/1/2026		85,000		85,575
4.15%, 3/1/2047		120,000		111,610
4.40%, 12/1/2021		25,000		26,797
4.50%, 2/1/2045		25,000		24,520
4.60%, 9/1/2035		100,000		102,954
4.75%, 3/1/2046		25,000		25,500
4.80%, 4/1/2044		25,000		25,628
				1,898,351
Chemicals – 0.3%
Agrium, Inc. 4.13%, 3/15/2035		25,000		24,022
Airgas, Inc. 3.05%, 8/1/2020		25,000		25,563
Celanese US Holdings LLC:
4.63%, 11/15/2022		10,000		10,591
5.88%, 6/15/2021		10,000		11,050
Dow Chemical Co.:
3.00%, 11/15/2022		75,000		75,818
4.25%, 11/15/2020		25,000		26,513
4.25%, 10/1/2034		50,000		49,801
4.38%, 11/15/2042		50,000		49,460
Eastman Chemical Co. 3.80%, 3/15/2025		25,000		25,504
Ecolab, Inc. 4.35%, 12/8/2021		25,000		26,973
EI du Pont de Nemours & Co.:
3.63%, 1/15/2021		25,000		26,002
4.63%, 1/15/2020		50,000		53,196
6.00%, 7/15/2018		25,000		26,353
HB Fuller Co. 4.00%, 2/15/2027		25,000		25,122
Lubrizol Corp. 8.88%, 2/1/2019		25,000		28,143
LYB International Finance B.V. 4.88%, 3/15/2044		25,000		25,956
LyondellBasell Industries NV:
4.63%, 2/26/2055		25,000		23,509
5.00%, 4/15/2019		100,000		105,327
5.75%, 4/15/2024		100,000		114,223
Monsanto Co.:
2.75%, 7/15/2021		50,000		49,962
4.70%, 7/15/2064		25,000		23,330
Mosaic Co. 5.63%, 11/15/2043		25,000		25,708
Potash Corp. of Saskatchewan, Inc.:
3.00%, 4/1/2025		50,000		47,614
4.00%, 12/15/2026		50,000		51,130
PPG Industries, Inc. 2.30%, 11/15/2019		25,000		25,207
Praxair, Inc.:
1.25%, 11/7/2018		50,000		49,748
3.20%, 1/30/2026		25,000		25,402
3.55%, 11/7/2042		25,000		23,836
RPM International, Inc.:
3.75%, 3/15/2027		50,000		50,056
5.25%, 6/1/2045		25,000		27,026
Westlake Chemical Corp.:
4.63%, 2/15/2021(d)		100,000		103,852
5.00%, 8/15/2046(d)		100,000		102,140
				1,358,137
Commercial Services – 0.1%
Automatic Data Processing, Inc. 2.25%, 9/15/2020		20,000		20,221
Catholic Health Initiatives 4.35%, 11/1/2042		25,000		21,227
Ecolab, Inc. 2.70%, 11/1/2026		150,000		142,657
Massachusetts Institute of Technology 3.96%, 7/1/2038		50,000		52,396
Moody’s Corp. 2.75%, 7/15/2019		50,000		50,618
President and Fellows of Harvard College 3.15%, 7/15/2046		225,000		207,785
S&P Global, Inc. 3.30%, 8/14/2020		50,000		50,914
University of Southern California 3.03%, 10/1/2039		25,000		22,492
				568,310

See accompanying notes to schedules of investments.

12

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Construction Materials – 0.1%
Johnson Controls International PLC:
3.63%, 7/2/2024(b)	$	25,000	$	25,568
4.50%, 2/15/2047		70,000		71,104
Masco Corp.:
3.50%, 4/1/2021		30,000		30,525
4.38%, 4/1/2026		170,000		177,279
Vulcan Materials Co. 7.50%, 6/15/2021		25,000		29,249
				333,725
Distribution & Wholesale – 0.0%(a)
WW Grainger, Inc. 4.60%, 6/15/2045		50,000		53,985
Diversified Financial Services – 0.9%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust:
3.95%, 2/1/2022		150,000		153,972
4.50%, 5/15/2021		300,000		314,385
Air Lease Corp.:
3.00%, 9/15/2023		25,000		24,341
3.63%, 4/1/2027		70,000		68,525
4.25%, 9/15/2024		25,000		25,888
American Express Credit Corp.:
2.13%, 3/18/2019		50,000		50,220
Series GMTN, 2.25%, 8/15/2019		50,000		50,332
Series MTN, 1.80%, 7/31/2018		50,000		50,040
Series MTN, 2.25%, 5/5/2021		350,000		346,724
Ameriprise Financial, Inc. 3.70%, 10/15/2024		50,000		51,358
BlackRock, Inc.:
3.20%, 3/15/2027		56,000		56,119
3.50%, 3/18/2024		25,000		26,099
Charles Schwab Corp. 3.45%, 2/13/2026		50,000		51,075
Credit Suisse USA, Inc. 7.13%, 7/15/2032		50,000		67,307
Discover Financial Services:
3.85%, 11/21/2022		50,000		50,938
4.10%, 2/9/2027		75,000		75,000
GE Capital International Funding Co.:
2.34%, 11/15/2020		200,000		200,752
4.42%, 11/15/2035		350,000		369,716
General Electric Co.:
5.30%, 2/11/2021		25,000		27,696
Series GMTN, 2.20%, 1/9/2020		200,000		202,106
Series GMTN, 3.45%, 5/15/2024		50,000		51,963
Series GMTN, 2.30%, 1/14/2019		25,000		25,306
Series MTN, 4.65%, 10/17/2021		50,000		54,908
Series MTN, 5.88%, 1/14/2038		50,000		63,105
HSBC Finance Corp. 6.68%, 1/15/2021		25,000		28,244
Intercontinental Exchange, Inc.:
2.75%, 12/1/2020		50,000		50,772
3.75%, 12/1/2025		180,000		186,197
Invesco Finance PLC 3.75%, 1/15/2026		50,000		51,301
Jefferies Group LLC:
4.85%, 1/15/2027		90,000		91,994
6.50%, 1/20/2043		50,000		54,062
National Rural Utilities Cooperative Finance Corp.:
1.65%, 2/8/2019		50,000		49,837
2.95%, 2/7/2024		100,000		100,250
4.02%, 11/1/2032		50,000		51,728
3 month USD LIBOR + 2.91%, 4.75%, 4/30/2043(c)		75,000		76,758
Nomura Holdings, Inc. Series GMTN, 2.75%, 3/19/2019		200,000		201,726
Synchrony Financial:
2.60%, 1/15/2019		50,000		50,378
4.50%, 7/23/2025		50,000		51,359
TD Ameritrade Holding Corp.:
2.95%, 4/1/2022		150,000		151,606
5.60%, 12/1/2019		25,000		27,233
Visa, Inc.:
2.80%, 12/14/2022		75,000		75,632
3.15%, 12/14/2025		250,000		251,040
4.15%, 12/14/2035		50,000		52,311
4.30%, 12/14/2045		50,000		52,499
				4,112,802
Electric – 1.7%
Alabama Power Co. 3.85%, 12/1/2042		75,000		71,624
Ameren Corp. 3.65%, 2/15/2026		50,000		50,326
Ameren Illinois Co. 4.15%, 3/15/2046		50,000		51,512
American Electric Power Co., Inc. Series F, 2.95%, 12/15/2022		50,000		50,135
Appalachian Power Co.:
4.40%, 5/15/2044		25,000		25,487
7.00%, 4/1/2038		25,000		33,633
Arizona Public Service Co.:
3.75%, 5/15/2046		25,000		23,372
4.35%, 11/15/2045		50,000		51,846
Baltimore Gas & Electric Co. 6.35%, 10/1/2036		50,000		63,783
Berkshire Hathaway Energy Co.:
2.40%, 2/1/2020		230,000		231,382
4.50%, 2/1/2045		50,000		51,925
5.15%, 11/15/2043		150,000		168,975
6.50%, 9/15/2037		80,000		104,050

See accompanying notes to schedules of investments.

13

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Electric – (continued)
Berkshire Hathaway, Inc. 2.75%, 3/15/2023	$	50,000	$	49,962
Black Hills Corp. 3.15%, 1/15/2027		25,000		23,826
CenterPoint Energy Houston Electric LLC:
Series AA, 3.00%, 2/1/2027		100,000		98,648
Series Z, 2.40%, 9/1/2026		50,000		46,867
Cleco Corporate Holdings LLC 4.97%, 5/1/2046(d)		20,000		20,607
CMS Energy Corp. 3.45%, 8/15/2027		50,000		49,626
Commonwealth Edison Co. 4.00%, 8/1/2020		100,000		105,225
Consolidated Edison Co. of New York, Inc.:
3.85%, 6/15/2046		50,000		48,027
4.45%, 3/15/2044		75,000		79,157
Series 06-B, 6.20%, 6/15/2036		25,000		31,563
Consolidated Edison, Inc. 2.00%, 5/15/2021		180,000		176,182
Consumers Energy Co. 3.25%, 8/15/2046		50,000		44,603
Dominion Resources, Inc.:
4.10%, 4/1/2021(b)		150,000		156,388
4.70%, 12/1/2044		130,000		133,925
Series A, 1.88%, 1/15/2019		100,000		99,868
Series B, 2.75%, 1/15/2022		150,000		149,364
Series D, 2.85%, 8/15/2026		25,000		23,371
DTE Electric Co. 3.70%, 6/1/2046		75,000		71,923
DTE Energy Co.:
2.40%, 12/1/2019		25,000		25,139
Series B, 3.30%, 6/15/2022		175,000		177,747
Duke Energy Carolinas LLC:
3.88%, 3/15/2046		150,000		146,347
4.25%, 12/15/2041		130,000		133,984
Duke Energy Corp.:
2.10%, 6/15/2018		72,000		72,247
2.65%, 9/1/2026		50,000		46,539
3.75%, 9/1/2046		150,000		134,720
Duke Energy Florida LLC 6.40%, 6/15/2038		50,000		65,709
Duke Energy Ohio, Inc. 3.70%, 6/15/2046		28,000		26,147
Duke Energy Progress LLC 2.80%, 5/15/2022		100,000		101,112
Edison International 2.95%, 3/15/2023		50,000		49,790
Emera US Finance L.P.:
2.15%, 6/15/2019		100,000		99,844
4.75%, 6/15/2046		30,000		30,270
Entergy Corp.:
2.95%, 9/1/2026		50,000		47,197
4.00%, 7/15/2022		50,000		52,343
Entergy Louisiana LLC:
3.05%, 6/1/2031		25,000		23,521
3.25%, 4/1/2028		200,000		197,534
Entergy Mississippi, Inc. 2.85%, 6/1/2028		25,000		23,715
Eversource Energy Series K, 2.75%, 3/15/2022		50,000		50,229
Exelon Corp.:
3.40%, 4/15/2026		100,000		98,286
3.95%, 6/15/2025		50,000		51,379
5.10%, 6/15/2045		330,000		355,149
FirstEnergy Corp.:
Series B, 4.25%, 3/15/2023		10,000		10,304
Series C, 7.38%, 11/15/2031		20,000		25,990
Florida Power & Light Co.:
3.25%, 6/1/2024		25,000		25,681
4.05%, 10/1/2044		50,000		50,868
Fortis, Inc. 3.06%, 10/4/2026(d)		50,000		46,855
Great Plains Energy, Inc.:
3.15%, 4/1/2022		50,000		50,534
3.90%, 4/1/2027		50,000		50,537
4.85%, 4/1/2047		29,000		29,807
Interstate Power & Light Co. 3.70%, 9/15/2046		50,000		46,092
Midamerican Funding LLC 6.93%, 3/1/2029		50,000		65,495
NextEra Energy Capital Holdings, Inc. 2.30%, 4/1/2019		100,000		100,574
NiSource Finance Corp.:
4.80%, 2/15/2044		30,000		31,534
6.80%, 1/15/2019		25,000		27,017
Oncor Electric Delivery Co. LLC 7.50%, 9/1/2038		50,000		71,876
Pacific Gas & Electric Co.:
2.95%, 3/1/2026		50,000		48,809
3.25%, 6/15/2023		50,000		50,916
3.30%, 3/15/2027		150,000		151,216
4.75%, 2/15/2044		50,000		54,685
6.05%, 3/1/2034		50,000		62,646
PPL Capital Funding, Inc.:
3.50%, 12/1/2022		75,000		76,579
5.00%, 3/15/2044		50,000		52,780
Public Service Co. of Colorado 3.20%, 11/15/2020		25,000		25,799
Public Service Electric & Gas Co.:
3.65%, 9/1/2042		50,000		47,577
Series MTN, 1.90%, 3/15/2021		50,000		49,166
Puget Sound Energy, Inc. 5.80%, 3/15/2040		50,000		60,729
Sierra Pacific Power Co. 2.60%, 5/1/2026		50,000		47,813

See accompanying notes to schedules of investments.

14

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Electric – (continued)
South Carolina Electric & Gas Co.:
4.10%, 6/15/2046	$	50,000	$	46,392
4.50%, 6/1/2064		35,000		33,864
Southern California Edison Co.:
4.00%, 4/1/2047		41,000		41,175
4.50%, 9/1/2040		25,000		26,667
Series 13-A, 3.90%, 3/15/2043		50,000		49,311
Series C, 3.60%, 2/1/2045		50,000		46,845
Southern Co.:
1.85%, 7/1/2019		250,000		248,610
2.35%, 7/1/2021		75,000		73,576
3.25%, 7/1/2026		50,000		47,571
4.25%, 7/1/2036		250,000		242,485
Series B, 3 month USD LIBOR + 3.63%, 5.50%, 3/15/2057(c)		50,000		51,318
Southern Power Co. Series F, 4.95%, 12/15/2046		150,000		148,942
Southwestern Electric Power Co. Series K, 2.75%, 10/1/2026		50,000		47,228
Southwestern Public Service Co. 3.30%, 6/15/2024		50,000		50,843
Virginia Electric & Power Co.:
3.45%, 2/15/2024		50,000		51,174
8.88%, 11/15/2038		50,000		80,593
Series B, 2.95%, 11/15/2026		30,000		29,174
WEC Energy Group, Inc. 3.55%, 6/15/2025		25,000		25,407
Westar Energy, Inc. 4.13%, 3/1/2042		30,000		29,872
Xcel Energy, Inc. 2.60%, 3/15/2022		200,000		198,998
				7,328,054
Electrical Components & Equipment – 0.0%(a)
Emerson Electric Co.:
2.63%, 12/1/2021		50,000		50,606
2.63%, 2/15/2023		25,000		24,932
Hubbell, Inc. 3.35%, 3/1/2026		50,000		49,723
				125,261
Electronics – 0.1%
Corning, Inc. 5.75%, 8/15/2040		25,000		28,442
Fortive Corp. 3.15%, 6/15/2026(d)		50,000		49,390
Honeywell International, Inc.:
1.40%, 10/30/2019		150,000		148,843
2.50%, 11/1/2026		150,000		142,083
3.35%, 12/1/2023		50,000		51,705
Keysight Technologies, Inc. 4.60%, 4/6/2027		30,000		30,260
Koninklijke Philips NV 3.75%, 3/15/2022		50,000		52,001
Thermo Fisher Scientific, Inc.:
3.30%, 2/15/2022		50,000		50,926
4.15%, 2/1/2024		25,000		26,205
				579,855
Engineering & Construction – 0.0%(a)
ABB Finance USA, Inc. 2.88%, 5/8/2022		50,000		50,519
Environmental Control – 0.1%
Republic Services, Inc.:
2.90%, 7/1/2026		45,000		43,396
3.55%, 6/1/2022		25,000		25,967
Waste Management, Inc.:
2.40%, 5/15/2023		150,000		146,915
3.50%, 5/15/2024		25,000		25,804
3.90%, 3/1/2035		50,000		49,714
				291,796
Food – 0.4%
General Mills, Inc.:
2.20%, 10/21/2019		25,000		25,129
3.20%, 2/10/2027		100,000		97,905
3.65%, 2/15/2024		50,000		51,727
Hershey Co. 3.20%, 8/21/2025		25,000		25,348
JM Smucker Co.:
2.50%, 3/15/2020		25,000		25,243
4.25%, 3/15/2035		50,000		50,347
Kellogg Co. 4.15%, 11/15/2019		25,000		26,274
Kraft Heinz Foods Co.:
2.80%, 7/2/2020		100,000		101,323
3.00%, 6/1/2026		150,000		140,907
3.50%, 7/15/2022		50,000		51,022
3.95%, 7/15/2025		50,000		50,700
4.38%, 6/1/2046		50,000		46,874
5.20%, 7/15/2045		200,000		208,694
6.13%, 8/23/2018		25,000		26,424
6.88%, 1/26/2039		50,000		62,267
Kroger Co.:
2.65%, 10/15/2026		50,000		46,079
3.85%, 8/1/2023		75,000		77,660
4.45%, 2/1/2047		100,000		98,110
Mondelez International, Inc. 4.00%, 2/1/2024		100,000		104,692
Sysco Corp.:
3.30%, 7/15/2026		100,000		97,746
3.75%, 10/1/2025		5,000		5,091
4.85%, 10/1/2045		5,000		5,216
Tyson Foods, Inc. 4.50%, 6/15/2022		30,000		31,988
Unilever Capital Corp.:
1.38%, 7/28/2021		100,000		96,045
2.00%, 7/28/2026		100,000		90,549
3.10%, 7/30/2025		50,000		49,790
Whole Foods Market, Inc. 5.20%, 12/3/2025		50,000		53,048
				1,746,198

See accompanying notes to schedules of investments.

15

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Forest Products & Paper – 0.1%
Celulosa Arauco y Constitucion SA 4.50%, 8/1/2024	$	50,000	$	51,521
Fibria Overseas Finance, Ltd. 5.50%, 1/17/2027		25,000		25,031
Georgia-Pacific LLC 7.75%, 11/15/2029		25,000		34,420
International Paper Co.:
3.00%, 2/15/2027		150,000		140,493
3.65%, 6/15/2024		25,000		25,422
4.40%, 8/15/2047		50,000		47,246
5.00%, 9/15/2035		100,000		106,432
				430,565
Gas – 0.1%
AGL Capital Corp. 5.25%, 8/15/2019		25,000		26,583
Atmos Energy Corp. 4.15%, 1/15/2043		25,000		25,106
Dominion Gas Holdings LLC:
2.80%, 11/15/2020		50,000		50,571
3.60%, 12/15/2024		50,000		50,499
4.80%, 11/1/2043		25,000		25,873
Southern California Gas Co.:
3.15%, 9/15/2024		25,000		25,363
3.20%, 6/15/2025		50,000		50,635
3.75%, 9/15/2042		30,000		29,117
5.13%, 11/15/2040		25,000		28,867
				312,614
Hand & Machine Tools – 0.0%(a)
Stanley Black & Decker, Inc. 3 month USD LIBOR + 4.30%, 5.75%, 12/15/2053(c)		50,000		52,512
Health Care Products – 0.5%
Abbott Laboratories:
2.35%, 11/22/2019		35,000		35,098
2.90%, 11/30/2021		50,000		50,201
3.40%, 11/30/2023		50,000		50,355
3.75%, 11/30/2026		150,000		150,262
4.75%, 11/30/2036		150,000		154,446
4.75%, 4/15/2043		25,000		25,269
4.90%, 11/30/2046		50,000		51,752
Baxter International, Inc. 3.50%, 8/15/2046		50,000		42,853
Becton Dickinson and Co.:
2.68%, 12/15/2019		44,000		44,607
3.73%, 12/15/2024		50,000		51,432
4.69%, 12/15/2044		25,000		26,089
Boston Scientific Corp.:
2.65%, 10/1/2018		25,000		25,256
3.38%, 5/15/2022		50,000		50,847
Covidien International Finance SA 3.20%, 6/15/2022		50,000		51,080
Danaher Corp. 2.40%, 9/15/2020		45,000		45,340
Medtronic, Inc.:
1.38%, 4/1/2018		25,000		24,963
3.15%, 3/15/2022		150,000		154,035
3.50%, 3/15/2025		150,000		153,444
4.38%, 3/15/2035		75,000		78,507
4.63%, 3/15/2045		75,000		80,448
5.55%, 3/15/2040		25,000		29,039
Stryker Corp.:
2.00%, 3/8/2019		150,000		150,361
3.38%, 11/1/2025		25,000		25,062
3.50%, 3/15/2026		25,000		25,245
4.63%, 3/15/2046		25,000		25,776
Thermo Fisher Scientific, Inc. 3.00%, 4/15/2023		250,000		247,745
Zimmer Biomet Holdings, Inc. 3.55%, 4/1/2025		100,000		98,819
				1,948,331
Health Care Services – 0.4%
Aetna, Inc.:
2.20%, 3/15/2019		25,000		25,162
2.80%, 6/15/2023		200,000		198,528
4.13%, 11/15/2042		25,000		24,581
Anthem, Inc.:
2.25%, 8/15/2019		50,000		50,063
3.30%, 1/15/2023		50,000		50,375
3.50%, 8/15/2024		25,000		25,110
4.65%, 1/15/2043		50,000		50,943
Ascension Health 3.95%, 11/15/2046		150,000		147,637
Cigna Corp. 5.38%, 2/15/2042		50,000		57,910
Howard Hughes Medical Institute 3.50%, 9/1/2023		25,000		26,093
Humana, Inc.:
2.63%, 10/1/2019		50,000		50,496
4.95%, 10/1/2044		50,000		52,667
Kaiser Foundation Hospitals 3.50%, 4/1/2022		50,000		51,594
Laboratory Corp. of America Holdings:
2.63%, 2/1/2020		25,000		25,072
4.70%, 2/1/2045		25,000		24,191
Memorial Sloan-Kettering Cancer Center 4.13%, 7/1/2052		25,000		24,511
Quest Diagnostics, Inc.:
2.70%, 4/1/2019		25,000		25,328
4.70%, 3/30/2045		25,000		25,120
UnitedHealth Group, Inc.:
1.70%, 2/15/2019		25,000		24,960
1.90%, 7/16/2018		25,000		25,072
2.13%, 3/15/2021		150,000		148,482
2.70%, 7/15/2020		105,000		107,043
2.88%, 3/15/2022		25,000		25,415
3.10%, 3/15/2026		50,000		49,516
3.75%, 7/15/2025		5,000		5,217
4.63%, 7/15/2035		200,000		217,302
4.75%, 7/15/2045		30,000		32,994
6.88%, 2/15/2038		25,000		34,002
				1,605,384

See accompanying notes to schedules of investments.

16

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Holding Companies-divers – 0.0%(a)
MUFG Americas Holdings Corp. 2.25%, 2/10/2020	$	25,000	$	24,951
Home Builders – 0.0%(a)
DR Horton, Inc.:
3.75%, 3/1/2019(d)		10,000		10,250
4.00%, 2/15/2020		15,000		15,570
				25,820
Home Furnishings – 0.0%(a)
Whirlpool Corp. 4.50%, 6/1/2046		25,000		24,905
Household Products – 0.1%
Colgate-Palmolive Co. Series MTN, 1.75%, 3/15/2019		25,000		25,095
Estee Lauder Cos., Inc. 1.80%, 2/7/2020		100,000		100,059
Procter & Gamble Co.:
1.70%, 11/3/2021		100,000		98,087
1.85%, 2/2/2021		50,000		49,664
				272,905
Household Products & Wares – 0.0%(a)
Kimberly-Clark Corp.:
1.40%, 2/15/2019		25,000		24,906
2.75%, 2/15/2026		25,000		24,354
				49,260
Housewares – 0.1%
Newell Brands, Inc.:
2.60%, 3/29/2019		10,000		10,122
3.15%, 4/1/2021		50,000		51,062
3.85%, 4/1/2023		50,000		51,724
4.20%, 4/1/2026		50,000		52,083
5.38%, 4/1/2036		150,000		168,457
5.50%, 4/1/2046		50,000		56,780
				390,228
Insurance – 0.7%
ACE INA Holdings, Inc. 2.88%, 11/3/2022		50,000		50,355
Aflac, Inc. 3.63%, 6/15/2023		50,000		51,859
Alleghany Corp. 4.90%, 9/15/2044		50,000		50,712
Allstate Corp.:
4.20%, 12/15/2046		50,000		50,779
3 month USD LIBOR + 2.94%, 5.75%, 8/15/2053(c)		25,000		26,796
American International Group, Inc.:
2.30%, 7/16/2019		50,000		50,175
3.30%, 3/1/2021		100,000		101,827
3.88%, 1/15/2035		200,000		182,604
3.90%, 4/1/2026		30,000		30,101
4.50%, 7/16/2044		50,000		47,608
4.88%, 6/1/2022		50,000		54,077
Aon PLC:
3.50%, 6/14/2024		50,000		50,112
3.88%, 12/15/2025		150,000		152,604
Berkshire Hathaway Finance Corp. 1.70%, 3/15/2019		55,000		55,113
Berkshire Hathaway, Inc.:
2.20%, 3/15/2021		155,000		155,136
3.00%, 2/11/2023		25,000		25,431
3.13%, 3/15/2026		55,000		54,898
4.50%, 2/11/2043		180,000		192,256
Chubb INA Holdings, Inc.:
3.35%, 5/3/2026		50,000		50,569
4.15%, 3/13/2043		25,000		25,436
4.35%, 11/3/2045		25,000		26,367
CNA Financial Corp. 4.50%, 3/1/2026		25,000		26,365
First American Financial Corp. 4.60%, 11/15/2024		25,000		25,101
Hartford Financial Services Group, Inc. 5.13%, 4/15/2022		25,000		27,609
Lincoln National Corp. 6.30%, 10/9/2037		50,000		60,161
Loews Corp. 3.75%, 4/1/2026		50,000		51,116
Manulife Financial Corp. USD 5 year swap rate + 1.65%, 4.06%, 2/24/2032(c)		50,000		50,079
Marsh & McLennan Cos., Inc.:
2.75%, 1/30/2022		30,000		30,106
3.30%, 3/14/2023		150,000		152,356
3.75%, 3/14/2026		25,000		25,675
Mercury General Corp. 4.40%, 3/15/2027		50,000		50,084
MetLife, Inc.:
3.60%, 4/10/2024		100,000		103,371
4.05%, 3/1/2045		150,000		144,744
6.40%, 12/15/2066		100,000		109,650
Series D, 4.37%, 9/15/2023		50,000		53,662
Principal Financial Group, Inc. 3 month USD LIBOR + 3.04%, 4.70%, 5/15/2055(c)		75,000		76,349
Progressive Corp. 3.75%, 8/23/2021		50,000		52,732
Prudential Financial, Inc.:
3 month USD LIBOR + 3.92%, 5.63%, 6/15/2043(c)		80,000		85,696
6.63%, 6/21/2040		25,000		32,576
Series MTN, 3.50%, 5/15/2024		50,000		51,491
Series MTN, 4.60%, 5/15/2044		75,000		79,000
Travelers Cos., Inc.:
3.75%, 5/15/2046		10,000		9,469
6.25%, 6/15/2037		25,000		32,386
Trinity Acquisition PLC 4.40%, 3/15/2026		26,000		26,628

See accompanying notes to schedules of investments.

17

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Insurance – (continued)
Voya Financial, Inc. 3.65%, 6/15/2026	$	50,000	$	49,342
XLIT, Ltd. 5.50%, 3/31/2045		125,000		124,490
				3,015,053
Internet – 0.2%
Alibaba Group Holding, Ltd.:
2.50%, 11/28/2019		200,000		201,156
3.13%, 11/28/2021		25,000		25,294
3.60%, 11/28/2024		75,000		75,688
Alphabet, Inc.:
2.00%, 8/15/2026		50,000		46,174
3.63%, 5/19/2021		50,000		52,970
Amazon.com, Inc.:
2.50%, 11/29/2022		25,000		24,874
2.60%, 12/5/2019		75,000		76,455
3.80%, 12/5/2024		30,000		31,736
4.95%, 12/5/2044		125,000		141,476
Baidu, Inc. 3.25%, 8/6/2018		100,000		101,511
eBay, Inc.:
3.45%, 8/1/2024		25,000		25,032
3.80%, 3/9/2022		50,000		51,977
				854,343
Iron/Steel – 0.1%
Nucor Corp.:
4.00%, 8/1/2023		25,000		26,414
5.20%, 8/1/2043		50,000		56,824
Vale Overseas, Ltd.:
4.38%, 1/11/2022		25,000		25,438
5.88%, 6/10/2021		300,000		321,750
8.25%, 1/17/2034		25,000		29,750
Vale SA 5.63%, 9/11/2042		50,000		47,312
				507,488
It Services – 0.8%
Apple, Inc.:
1.55%, 2/8/2019		100,000		100,105
1.55%, 2/7/2020		25,000		24,835
1.55%, 8/4/2021		50,000		48,459
1.70%, 2/22/2019		35,000		35,116
2.25%, 2/23/2021		200,000		200,516
2.40%, 5/3/2023		25,000		24,583
2.45%, 8/4/2026		200,000		189,074
2.85%, 5/6/2021		25,000		25,585
2.85%, 2/23/2023		250,000		252,130
3.00%, 2/9/2024		100,000		100,833
3.25%, 2/23/2026		150,000		151,345
3.85%, 5/4/2043		25,000		23,938
3.85%, 8/4/2046		150,000		142,879
4.38%, 5/13/2045		75,000		76,954
4.50%, 2/23/2036		100,000		107,807
4.65%, 2/23/2046		75,000		80,312
Diamond 1 Finance Corp./Diamond 2 Finance Corp.:
3.48%, 6/1/2019(e)		120,000		122,884
4.42%, 6/15/2021(e)		50,000		52,280
5.45%, 6/15/2023(e)		325,000		349,690
6.02%, 6/15/2026(e)		20,000		21,826
8.35%, 7/15/2046(e)		70,000		90,407
Hewlett Packard Enterprise Co.:
2.85%, 10/5/2018		155,000		156,855
3.60%, 10/15/2020		10,000		10,294
4.90%, 10/15/2025		70,000		72,843
6.20%, 10/15/2035		10,000		10,449
6.35%, 10/15/2045		10,000		10,284
HP, Inc.:
4.05%, 9/15/2022		25,000		26,101
4.65%, 12/9/2021		50,000		53,574
International Business Machines Corp.:
1.80%, 5/17/2019		100,000		100,371
2.25%, 2/19/2021		200,000		200,844
2.88%, 11/9/2022		100,000		101,315
3.63%, 2/12/2024		50,000		52,332
4.70%, 2/19/2046		25,000		27,422
5.88%, 11/29/2032		25,000		31,453
Seagate HDD Cayman:
4.25%, 3/1/2022(e)		150,000		148,399
4.75%, 6/1/2023		50,000		50,225
				3,274,319
Lodging – 0.1%
Marriott International, Inc.:
2.30%, 1/15/2022		150,000		146,541
2.88%, 3/1/2021		50,000		50,500
3.75%, 3/15/2025		25,000		25,312
Wyndham Worldwide Corp.:
4.15%, 4/1/2024		30,000		30,325
4.50%, 4/1/2027		35,000		35,387
				288,065
Machinery, Construction & Mining – 0.1%
Caterpillar Financial Services Corp.:
1.70%, 8/9/2021		150,000		144,630
Series MTN, 1.35%, 5/18/2019		100,000		98,793
Series MTN, 3.75%, 11/24/2023		25,000		26,299
Caterpillar, Inc.:
3.80%, 8/15/2042		125,000		118,560
4.75%, 5/15/2064		25,000		26,438
				414,720
Machinery-Diversified – 0.1%
Deere & Co.:
2.60%, 6/8/2022		25,000		24,987
3.90%, 6/9/2042		25,000		24,946
John Deere Capital Corp.:
Series MTN, 1.65%, 10/15/2018		250,000		249,965

See accompanying notes to schedules of investments.

18

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Machinery-Diversified – (continued)
Series MTN, 1.95%, 1/8/2019	$	50,000	$	50,237
Series MTN, 2.38%, 7/14/2020		25,000		25,156
Series MTN, 2.80%, 3/6/2023		150,000		150,315
Series MTN, 3.40%, 9/11/2025		25,000		25,701
Roper Technologies, Inc.:
2.80%, 12/15/2021		50,000		50,038
3.80%, 12/15/2026		30,000		30,190
				631,535
Media – 0.9%
21st Century Fox America, Inc.:
3.70%, 10/15/2025		100,000		101,345
4.00%, 10/1/2023		100,000		104,370
5.40%, 10/1/2043		75,000		81,793
7.25%, 5/18/2018		25,000		26,478
CBS Corp.:
2.30%, 8/15/2019		75,000		75,244
2.90%, 1/15/2027		25,000		23,282
Charter Communications Operating LLC/Charter Communications Operating Capital:
3.58%, 7/23/2020		65,000		66,807
4.46%, 7/23/2022		150,000		158,062
4.91%, 7/23/2025		50,000		52,813
6.48%, 10/23/2045		185,000		212,981
Comcast Corp.:
2.75%, 3/1/2023		175,000		174,520
3.15%, 3/1/2026		225,000		221,317
3.20%, 7/15/2036		250,000		221,810
3.40%, 7/15/2046		100,000		85,622
3.60%, 3/1/2024		25,000		25,758
4.20%, 8/15/2034		100,000		101,424
4.25%, 1/15/2033		50,000		51,493
4.65%, 7/15/2042		75,000		78,094
Discovery Communications LLC:
3.25%, 4/1/2023		25,000		24,412
3.80%, 3/13/2024		100,000		99,401
4.95%, 5/15/2042		50,000		45,227
Grupo Televisa SAB:
5.00%, 5/13/2045		50,000		45,717
6.13%, 1/31/2046		100,000		104,857
NBCUniversal Media LLC:
5.15%, 4/30/2020		50,000		54,565
6.40%, 4/30/2040		50,000		63,564
Thomson Reuters Corp.:
3.35%, 5/15/2026		50,000		48,667
3.85%, 9/29/2024		25,000		25,545
Time Warner Cable LLC:
4.00%, 9/1/2021		25,000		25,875
5.00%, 2/1/2020		100,000		106,375
5.50%, 9/1/2041		25,000		25,656
5.88%, 11/15/2040		50,000		53,563
6.75%, 7/1/2018		25,000		26,438
6.75%, 6/15/2039		50,000		58,687
Time Warner, Inc.:
3.55%, 6/1/2024		25,000		25,050
3.60%, 7/15/2025		150,000		148,315
3.80%, 2/15/2027		150,000		148,507
4.65%, 6/1/2044		25,000		23,637
4.85%, 7/15/2045		50,000		48,718
6.50%, 11/15/2036		50,000		59,363
Viacom, Inc.:
2.25%, 2/4/2022		200,000		191,719
4.38%, 3/15/2043		25,000		21,662
5.85%, 9/1/2043		50,000		52,460
Walt Disney Co.:
2.30%, 2/12/2021		200,000		201,398
3.00%, 2/13/2026		50,000		49,885
Series GMTN, 3.15%, 9/17/2025		25,000		25,436
Series MTN, 0.88%, 7/12/2019		25,000		24,540
Series MTN, 3.00%, 7/30/2046		75,000		63,163
Series MTN, 5.50%, 3/15/2019		25,000		26,838
				3,782,453
Metal Fabricate & Hardware – 0.0%(a)
Precision Castparts Corp. 2.50%, 1/15/2023		75,000		73,948
Mining – 0.2%
Barrick Gold Corp.:
4.10%, 5/1/2023		50,000		53,397
5.25%, 4/1/2042		25,000		26,916
Barrick North America Finance LLC 4.40%, 5/30/2021		7,000		7,485
BHP Billiton Finance USA, Ltd.:
4.13%, 2/24/2042		125,000		124,904
5.00%, 9/30/2043		50,000		55,970
Goldcorp, Inc. 3.70%, 3/15/2023		50,000		50,987
Newmont Mining Corp.:
3.50%, 3/15/2022		25,000		25,739
4.88%, 3/15/2042		50,000		49,968
Rio Tinto Finance USA PLC:
3.50%, 3/22/2022		4,000		4,156
4.13%, 8/21/2042		25,000		24,793
Rio Tinto Finance USA, Ltd. 3.75%, 6/15/2025		250,000		259,053
Southern Copper Corp. 5.88%, 4/23/2045		207,000		215,872
				899,240
Miscellaneous Manufacturer – 0.2%
3M Co.:
Series MTN, 1.63%, 6/15/2019		25,000		25,046
Series MTN, 2.00%, 8/7/2020		100,000		100,414
Eaton Corp. 4.15%, 11/2/2042		25,000		24,569

See accompanying notes to schedules of investments.

19

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Miscellaneous Manufacturer – (continued)
General Electric Co.:
2.70%, 10/9/2022	$	250,000	$	251,730
4.13%, 10/9/2042		125,000		127,360
4.50%, 3/11/2044		50,000		53,602
Illinois Tool Works, Inc.:
1.95%, 3/1/2019		25,000		25,180
3.90%, 9/1/2042		25,000		25,039
Ingersoll-Rand Global Holding Co., Ltd.:
5.75%, 6/15/2043		25,000		29,719
6.88%, 8/15/2018		25,000		26,701
Parker-Hannifin Corp. Series MTN, 3.30%, 11/21/2024		50,000		50,947
Tyco Electronics Group SA 3.70%, 2/15/2026		50,000		51,117
				791,424
Multi-National – 1.0%
African Development Bank:
Series GDIF, 1.00%, 5/15/2019		50,000		49,419
Series GDIF, 1.25%, 7/26/2021		25,000		24,131
Asian Development Bank:
1.38%, 1/15/2019		375,000		374,666
1.63%, 3/16/2021		150,000		148,237
1.75%, 9/11/2018		50,000		50,297
2.13%, 11/24/2021		75,000		75,171
Series GMTN, 2.00%, 4/24/2026		100,000		95,562
Corp. Andina de Fomento 2.13%, 9/27/2021		50,000		49,030
Council of Europe Development Bank:
1.13%, 5/31/2018		25,000		24,932
1.63%, 3/16/2021		50,000		49,175
European Bank for Reconstruction & Development:
1.00%, 9/17/2018		50,000		49,735
1.63%, 11/15/2018		25,000		25,085
Series GMTN, 1.88%, 2/23/2022		75,000		74,039
European Investment Bank:
1.00%, 6/15/2018		50,000		49,804
1.13%, 8/15/2018		175,000		174,445
1.38%, 9/15/2021		200,000		193,648
1.75%, 6/17/2019		25,000		25,073
1.88%, 3/15/2019		50,000		50,310
1.88%, 2/10/2025		100,000		95,119
2.00%, 3/15/2021		225,000		224,890
2.13%, 10/15/2021		50,000		49,939
2.50%, 4/15/2021		50,000		50,893
2.50%, 10/15/2024		25,000		25,011
Series MTN, 1.25%, 5/15/2019		350,000		347,781
Inter-American Development Bank:
1.13%, 8/28/2018		50,000		49,866
1.25%, 10/15/2019		100,000		99,162
1.88%, 6/16/2020		135,000		135,456
2.13%, 11/9/2020		25,000		25,226
3.00%, 2/21/2024		100,000		103,772
4.38%, 1/24/2044		75,000		87,527
International Bank for Reconstruction & Development:
0.88%, 7/19/2018		200,000		198,942
1.00%, 10/5/2018		100,000		99,513
2.13%, 11/1/2020		25,000		25,256
Series GDIF, 1.38%, 4/10/2018		100,000		100,150
Series GDIF, 1.38%, 5/24/2021		275,000		268,834
Series GDIF, 2.50%, 11/25/2024		50,000		50,125
Series GDIF, 2.50%, 7/29/2025		200,000		199,308
Series GMTN, 0.88%, 8/15/2019		50,000		49,251
Series GMTN, 4.75%, 2/15/2035		25,000		30,663
International Finance Corp.:
1.75%, 9/4/2018		175,000		176,048
Series GMTN, 1.13%, 7/20/2021		125,000		120,375
Nordic Investment Bank 1.13%, 2/25/2019		50,000		49,657
				4,245,523
Office & Business Equipment – 0.0%(a)
Xerox Corp. 3.50%, 8/20/2020		50,000		50,767
Oil & Gas – 1.7%
Anadarko Petroleum Corp.:
3.45%, 7/15/2024		50,000		48,737
6.20%, 3/15/2040		25,000		28,451
6.60%, 3/15/2046		200,000		241,938
Apache Corp.:
4.75%, 4/15/2043		25,000		24,984
6.00%, 1/15/2037		50,000		56,668
BP Capital Markets PLC:
1.38%, 5/10/2018		25,000		24,927
2.24%, 5/10/2019		25,000		25,131
2.32%, 2/13/2020		50,000		50,235
3.02%, 1/16/2027		200,000		192,012
3.06%, 3/17/2022		200,000		202,504
3.81%, 2/10/2024		150,000		155,380
Canadian Natural Resources, Ltd.:
3.45%, 11/15/2021		25,000		25,383
3.90%, 2/1/2025		25,000		25,177
Cenovus Energy, Inc.:
3.00%, 8/15/2022		20,000		19,714
4.45%, 9/15/2042		45,000		39,866
5.70%, 10/15/2019		30,000		32,286

See accompanying notes to schedules of investments.

20

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Oil & Gas – (continued)
Chevron Corp.:
1.56%, 5/16/2019	$	75,000	$	74,731
1.72%, 6/24/2018		25,000		25,065
2.10%, 5/16/2021		250,000		247,827
2.42%, 11/17/2020		75,000		75,688
2.95%, 5/16/2026		50,000		49,371
3.19%, 6/24/2023		25,000		25,606
CNOOC Finance 2015 Australia Pty, Ltd. 2.63%, 5/5/2020		50,000		49,925
CNOOC Finance 2015 USA LLC 3.50%, 5/5/2025		100,000		99,161
ConocoPhillips 6.50%, 2/1/2039		75,000		95,440
ConocoPhillips Co.:
2.20%, 5/15/2020		50,000		50,176
4.20%, 3/15/2021		250,000		266,490
4.95%, 3/15/2026		200,000		222,264
5.75%, 2/1/2019		25,000		26,749
ConocoPhillips Holding Co. 6.95%, 4/15/2029		50,000		64,556
Devon Energy Corp.:
3.25%, 5/15/2022		50,000		49,500
5.00%, 6/15/2045		25,000		25,031
5.85%, 12/15/2025		50,000		57,187
Ecopetrol SA:
4.13%, 1/16/2025		100,000		96,899
5.88%, 5/28/2045		25,000		22,809
7.38%, 9/18/2043		50,000		53,492
Encana Corp. 3.90%, 11/15/2021		25,000		25,531
EOG Resources, Inc.:
2.63%, 3/15/2023		100,000		97,570
3.90%, 4/1/2035		25,000		23,775
Exxon Mobil Corp.:
1.71%, 3/1/2019		250,000		250,430
2.22%, 3/1/2021		200,000		200,240
2.73%, 3/1/2023		150,000		150,399
4.11%, 3/1/2046		125,000		128,192
Hess Corp. 5.60%, 2/15/2041		75,000		75,375
Marathon Oil Corp.:
2.80%, 11/1/2022		25,000		24,000
5.20%, 6/1/2045		50,000		49,438
Marathon Petroleum Corp. 3.63%, 9/15/2024		50,000		49,352
Nabors Industries, Inc. 5.50%, 1/15/2023(e)		210,000		215,250
Nexen Energy ULC 5.88%, 3/10/2035		100,000		116,704
Noble Energy, Inc. 5.25%, 11/15/2043		50,000		51,620
Occidental Petroleum Corp.:
2.60%, 4/15/2022		100,000		99,647
4.40%, 4/15/2046		25,000		25,323
Series 1, 4.10%, 2/1/2021		25,000		26,455
Petro-Canada 5.35%, 7/15/2033		25,000		27,570
Petroleos Mexicanos:
2.46%, 12/15/2025		22,500		22,234
3.50%, 7/18/2018		25,000		25,345
3.50%, 7/23/2020		225,000		227,297
3.50%, 1/30/2023		25,000		23,792
4.25%, 1/15/2025		25,000		24,034
4.50%, 1/23/2026		75,000		71,993
4.63%, 9/21/2023		75,000		75,510
5.38%, 3/13/2022(e)		50,000		52,481
5.50%, 2/4/2019		50,000		52,450
6.38%, 1/23/2045		150,000		146,317
6.50%, 3/13/2027(e)		150,000		161,343
6.75%, 9/21/2047		198,000		200,980
Phillips 66:
4.30%, 4/1/2022		35,000		37,105
4.88%, 11/15/2044		50,000		50,109
Pioneer Natural Resources Co. 4.45%, 1/15/2026		50,000		52,718
Shell International Finance B.V.:
1.38%, 5/10/2019		25,000		24,777
1.88%, 5/10/2021		250,000		244,732
2.13%, 5/11/2020		100,000		100,099
3.25%, 5/11/2025		100,000		100,670
4.00%, 5/10/2046		50,000		47,947
4.13%, 5/11/2035		75,000		75,430
4.30%, 9/22/2019		25,000		26,442
4.38%, 5/11/2045		250,000		253,490
5.50%, 3/25/2040		25,000		29,305
Statoil ASA:
1.95%, 11/8/2018		25,000		25,073
2.65%, 1/15/2024		75,000		73,569
3.70%, 3/1/2024		100,000		104,167
3.95%, 5/15/2043		50,000		48,213
Suncor Energy, Inc.:
3.60%, 12/1/2024		25,000		25,261
6.50%, 6/15/2038		50,000		62,780
Total Capital International SA:
2.10%, 6/19/2019		100,000		100,477
3.75%, 4/10/2024		25,000		26,033
Total Capital SA 2.13%, 8/10/2018		25,000		25,175
Valero Energy Corp.:
3.40%, 9/15/2026		50,000		47,696
6.13%, 2/1/2020		25,000		27,519
6.63%, 6/15/2037		50,000		59,169
				7,259,963
Oil & Gas Services – 0.1%
Baker Hughes, Inc. 3.20%, 8/15/2021		8,000		8,171
Halliburton Co.:
4.85%, 11/15/2035		150,000		157,482
5.00%, 11/15/2045		35,000		36,801
7.45%, 9/15/2039		25,000		33,410
National Oilwell Varco, Inc. 2.60%, 12/1/2022		75,000		71,645
				307,509
Packaging & Containers – 0.0%(a)
Bemis Co., Inc. 3.10%, 9/15/2026		50,000		48,198

See accompanying notes to schedules of investments.

21

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Pharmaceuticals – 1.3%
Abbott Laboratories 2.95%, 3/15/2025	$	75,000	$	71,569
AbbVie, Inc.:
2.30%, 5/14/2021		325,000		321,275
2.50%, 5/14/2020		25,000		25,177
2.90%, 11/6/2022		25,000		24,899
3.20%, 5/14/2026		200,000		192,148
4.30%, 5/14/2036		50,000		48,441
4.40%, 11/6/2042		50,000		47,725
4.45%, 5/14/2046		150,000		144,097
4.50%, 5/14/2035		50,000		49,835
Actavis Funding SCS:
3.00%, 3/12/2020		75,000		76,237
3.45%, 3/15/2022		200,000		204,116
3.80%, 3/15/2025		75,000		75,709
3.85%, 6/15/2024		50,000		51,010
4.55%, 3/15/2035		100,000		100,383
4.75%, 3/15/2045		75,000		75,472
AstraZeneca PLC:
1.75%, 11/16/2018		100,000		100,073
3.38%, 11/16/2025		35,000		35,217
4.00%, 9/18/2042		25,000		24,272
6.45%, 9/15/2037		25,000		32,603
Baxalta, Inc.:
2.88%, 6/23/2020		25,000		25,350
4.00%, 6/23/2025		25,000		25,455
Bristol-Myers Squibb Co.:
1.75%, 3/1/2019		25,000		24,994
3.25%, 8/1/2042		50,000		43,689
Cardinal Health, Inc.:
2.40%, 11/15/2019		50,000		50,305
4.90%, 9/15/2045		25,000		26,019
Eli Lilly & Co. 5.55%, 3/15/2037		25,000		30,056
Express Scripts Holding Co.:
2.25%, 6/15/2019		25,000		25,012
3.00%, 7/15/2023		150,000		145,633
3.30%, 2/25/2021		25,000		25,474
4.50%, 2/25/2026		75,000		76,957
6.13%, 11/15/2041		25,000		28,356
GlaxoSmithKline Capital, Inc.:
2.80%, 3/18/2023		25,000		25,014
4.20%, 3/18/2043		25,000		25,653
6.38%, 5/15/2038		50,000		65,553
Johnson & Johnson:
1.65%, 3/1/2021		50,000		49,276
2.45%, 3/1/2026		30,000		28,840
3.38%, 12/5/2023		25,000		26,210
3.55%, 3/1/2036		150,000		147,130
3.63%, 3/3/2037		100,000		99,603
3.70%, 3/1/2046		50,000		48,780
4.50%, 12/5/2043		50,000		55,108
McKesson Corp.:
2.28%, 3/15/2019		75,000		75,365
2.85%, 3/15/2023		25,000		24,646
4.88%, 3/15/2044		25,000		25,740
Mead Johnson Nutrition Co. 4.60%, 6/1/2044		25,000		25,895
Merck & Co., Inc.:
2.35%, 2/10/2022		50,000		49,935
2.40%, 9/15/2022		25,000		24,791
2.75%, 2/10/2025		325,000		320,788
3.60%, 9/15/2042		25,000		23,438
3.70%, 2/10/2045		50,000		47,488
Mylan NV:
3.00%, 12/15/2018		100,000		101,157
3.15%, 6/15/2021		80,000		80,290
Novartis Capital Corp.:
1.80%, 2/14/2020		125,000		125,121
2.40%, 5/17/2022		50,000		49,691
3.00%, 11/20/2025		25,000		24,917
3.10%, 5/17/2027		30,000		29,855
3.40%, 5/6/2024		25,000		25,800
4.00%, 11/20/2045		50,000		50,142
Novartis Securities Investment, Ltd. 5.13%, 2/10/2019		25,000		26,540
Perrigo Finance Unlimited Co. 4.38%, 3/15/2026		50,000		50,800
Pfizer, Inc.:
1.20%, 6/1/2018		30,000		29,938
1.45%, 6/3/2019		100,000		99,499
2.10%, 5/15/2019		25,000		25,212
2.20%, 12/15/2021		200,000		199,432
3.00%, 12/15/2026		150,000		148,248
3.40%, 5/15/2024		25,000		25,926
4.00%, 12/15/2036		150,000		150,996
7.20%, 3/15/2039		75,000		107,282
Sanofi 4.00%, 3/29/2021		25,000		26,542
Shire Acquisitions Investments Ireland DAC:
1.90%, 9/23/2019		150,000		148,770
2.40%, 9/23/2021		50,000		48,858
2.88%, 9/23/2023		100,000		96,931
3.20%, 9/23/2026		30,000		28,610
Teva Pharmaceutical Finance IV LLC 2.25%, 3/18/2020		25,000		24,756
Teva Pharmaceutical Finance Netherlands III B.V.:
1.40%, 7/20/2018		50,000		49,690
1.70%, 7/19/2019		200,000		197,476
2.20%, 7/21/2021		50,000		48,187
3.15%, 10/1/2026		25,000		23,025
4.10%, 10/1/2046		25,000		21,518
Wyeth LLC 6.00%, 2/15/2036		25,000		31,023
Zoetis, Inc. 4.70%, 2/1/2043		25,000		25,366
				5,538,409
Pipelines – 0.9%
Buckeye Partners L.P. 4.88%, 2/1/2021		25,000		26,341
Enable Midstream Partners L.P. 4.40%, 3/15/2027		50,000		49,688
Enbridge Energy Partners L.P. 4.20%, 9/15/2021		25,000		25,971

See accompanying notes to schedules of investments.

22

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Pipelines – (continued)
Enbridge, Inc. 4.25%, 12/1/2026	$	50,000	$	51,055
Energy Transfer Partners L.P.:
4.20%, 4/15/2027		50,000		49,595
4.75%, 1/15/2026		225,000		231,995
5.15%, 2/1/2043		25,000		23,327
5.15%, 3/15/2045		225,000		211,633
5.20%, 2/1/2022		100,000		107,148
6.70%, 7/1/2018		50,000		52,736
EnLink Midstream Partners L.P. 4.85%, 7/15/2026		25,000		25,813
Enterprise Products Operating LLC:
2.85%, 4/15/2021		75,000		75,355
3.75%, 2/15/2025		75,000		75,626
3.95%, 2/15/2027		200,000		203,750
4.85%, 3/15/2044		50,000		50,484
4.90%, 5/15/2046		50,000		51,130
Series N, 6.50%, 1/31/2019		25,000		26,985
Kinder Morgan Energy Partners L.P.:
3.50%, 3/1/2021		25,000		25,384
5.40%, 9/1/2044		25,000		24,714
Kinder Morgan, Inc.:
3.05%, 12/1/2019		225,000		228,863
4.30%, 6/1/2025		50,000		51,056
5.05%, 2/15/2046		50,000		48,460
5.30%, 12/1/2034		200,000		200,738
5.55%, 6/1/2045		150,000		153,502
Magellan Midstream Partners L.P. 5.00%, 3/1/2026		50,000		54,916
MPLX L.P.:
4.88%, 6/1/2025		50,000		52,444
5.20%, 3/1/2047		100,000		100,596
ONEOK Partners L.P. 3.38%, 10/1/2022		25,000		25,004
Phillips 66 Partners L.P.:
3.55%, 10/1/2026		10,000		9,577
4.90%, 10/1/2046		10,000		9,514
Plains All American Pipeline L.P./PAA Finance Corp.:
3.60%, 11/1/2024		25,000		24,207
4.50%, 12/15/2026		50,000		50,970
4.65%, 10/15/2025		50,000		51,526
4.70%, 6/15/2044		25,000		22,704
Sabine Pass Liquefaction LLC:
5.63%, 2/1/2021		95,000		102,362
5.63%, 3/1/2025		200,000		215,840
5.75%, 5/15/2024		75,000		81,697
Spectra Energy Partners L.P. 2.95%, 9/25/2018		25,000		25,330
Sunoco Logistics Partners Operations L.P.:
5.30%, 4/1/2044		25,000		24,235
5.35%, 5/15/2045		25,000		24,351
TransCanada PipeLines, Ltd.:
2.50%, 8/1/2022		100,000		98,346
4.63%, 3/1/2034		250,000		261,595
7.63%, 1/15/2039		25,000		35,027
Transcontinental Gas Pipe Line Co. LLC 7.85%, 2/1/2026		200,000		256,120
Western Gas Partners L.P. 5.45%, 4/1/2044		25,000		25,500
Williams Partners L.P.:
3.60%, 3/15/2022		100,000		101,374
3.90%, 1/15/2025		50,000		49,995
5.10%, 9/15/2045		125,000		124,305
5.25%, 3/15/2020		25,000		26,891
Williams Partners L.P./ACMP Finance Corp. 4.88%, 5/15/2023		50,000		51,726
				3,977,501
Real Estate – 0.1%
CBRE Services, Inc. 4.88%, 3/1/2026		50,000		51,943
Prologis L.P.:
3.75%, 11/1/2025		50,000		51,168
4.25%, 8/15/2023		150,000		159,237
				262,348
Real Estate Investment Trusts – 0.6%
American Tower Corp.:
2.25%, 1/15/2022		100,000		96,444
3.13%, 1/15/2027		100,000		93,494
3.38%, 10/15/2026		75,000		71,674
3.40%, 2/15/2019		25,000		25,553
3.50%, 1/31/2023		50,000		50,278
AvalonBay Communities, Inc.:
Series GMTN, 2.95%, 9/15/2022		25,000		25,019
Series GMTN, 2.95%, 5/11/2026		50,000		47,899
Series MTN, 3.90%, 10/15/2046		50,000		46,699
Boston Properties L.P.:
2.75%, 10/1/2026		150,000		138,157
3.65%, 2/1/2026		100,000		99,402
3.85%, 2/1/2023		75,000		77,606
Brixmor Operating Partnership L.P. 4.13%, 6/15/2026		50,000		50,192
Care Capital Properties L.P. 5.13%, 8/15/2026		25,000		24,764
CBL & Associates L.P. 5.95%, 12/15/2026		50,000		48,138
Crown Castle International Corp.:
3.70%, 6/15/2026		15,000		14,731
4.00%, 3/1/2027		20,000		20,121
5.25%, 1/15/2023		100,000		109,082
DDR Corp. 3.50%, 1/15/2021		25,000		25,216

See accompanying notes to schedules of investments.

23

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Real Estate Investment Trusts – (continued)
Digital Realty Trust L.P. 3.95%, 7/1/2022	$	25,000	$	25,934
ERP Operating L.P. 2.38%, 7/1/2019		50,000		50,362
HCP, Inc.:
2.63%, 2/1/2020		25,000		25,156
3.88%, 8/15/2024		50,000		50,337
Healthcare Trust of America Holdings L.P. 3.50%, 8/1/2026		25,000		23,952
Highwoods Realty L.P. 3.88%, 3/1/2027		50,000		49,428
Hospitality Properties Trust:
4.50%, 6/15/2023		25,000		25,780
4.95%, 2/15/2027		70,000		71,630
Host Hotels & Resorts L.P. 3.88%, 4/1/2024		50,000		50,488
Kimco Realty Corp.:
2.80%, 10/1/2026		50,000		45,905
3.80%, 4/1/2027		25,000		24,920
National Retail Properties, Inc. 3.60%, 12/15/2026		50,000		49,078
Omega Healthcare Investors, Inc. 4.38%, 8/1/2023		150,000		152,107
Realty Income Corp. 4.13%, 10/15/2026		50,000		51,541
Simon Property Group L.P.:
2.50%, 7/15/2021		350,000		348,876
4.25%, 11/30/2046		50,000		48,470
5.65%, 2/1/2020		25,000		27,186
UDR, Inc. Series MTN, 2.95%, 9/1/2026		25,000		23,278
Ventas Realty L.P.:
3.10%, 1/15/2023		50,000		49,742
4.38%, 2/1/2045		75,000		70,691
VEREIT Operating Partnership L.P.:
3.00%, 2/6/2019		10,000		10,013
4.13%, 6/1/2021		5,000		5,125
4.60%, 2/6/2024		5,000		5,138
4.88%, 6/1/2026		10,000		10,394
Welltower, Inc.:
4.00%, 6/1/2025		175,000		177,420
5.25%, 1/15/2022		50,000		54,776
Weyerhaeuser Co. 4.63%, 9/15/2023		25,000		27,010
				2,619,206
Retail – 0.8%
AutoNation, Inc. 3.35%, 1/15/2021		25,000		25,270
CVS Health Corp.:
2.13%, 6/1/2021		100,000		98,184
2.25%, 12/5/2018		50,000		50,335
2.80%, 7/20/2020		20,000		20,315
2.88%, 6/1/2026		210,000		200,000
3.38%, 8/12/2024		25,000		25,127
3.88%, 7/20/2025		20,000		20,599
4.00%, 12/5/2023		25,000		26,235
4.88%, 7/20/2035		45,000		48,454
5.13%, 7/20/2045		185,000		204,109
Dollar General Corp. 4.15%, 11/1/2025		25,000		25,807
Home Depot, Inc.:
2.00%, 6/15/2019		25,000		25,192
2.00%, 4/1/2021		100,000		99,486
2.25%, 9/10/2018		25,000		25,269
2.63%, 6/1/2022		150,000		151,212
3.00%, 4/1/2026		50,000		49,908
3.75%, 2/15/2024		25,000		26,461
4.25%, 4/1/2046		35,000		36,388
5.95%, 4/1/2041		50,000		63,874
Kohl’s Corp. 5.55%, 7/17/2045		20,000		18,030
Lowe’s Cos., Inc.:
2.50%, 4/15/2026		50,000		47,388
3.38%, 9/15/2025		25,000		25,496
3.70%, 4/15/2046		50,000		46,569
4.25%, 9/15/2044		25,000		25,359
4.38%, 9/15/2045		25,000		25,831
4.65%, 4/15/2042		25,000		26,777
Macy’s Retail Holdings, Inc.:
3.63%, 6/1/2024		25,000		23,833
4.50%, 12/15/2034		50,000		43,288
McDonald’s Corp.:
Series MTN, 1.88%, 5/29/2019		25,000		25,035
Series MTN, 2.75%, 12/9/2020		25,000		25,360
Series MTN, 3.50%, 3/1/2027		50,000		50,202
Series MTN, 3.70%, 1/30/2026		75,000		76,579
Series MTN, 4.70%, 12/9/2035		50,000		52,403
Series MTN, 4.88%, 12/9/2045		100,000		106,481
QVC, Inc. 5.45%, 8/15/2034		50,000		45,875
Starbucks Corp. 3.85%, 10/1/2023		25,000		26,814
Target Corp.:
2.30%, 6/26/2019		275,000		278,421
2.50%, 4/15/2026		50,000		46,710
4.00%, 7/1/2042		50,000		48,340
TJX Cos., Inc. 2.25%, 9/15/2026		50,000		45,953
Wal-Mart Stores, Inc.:
1.13%, 4/11/2018		25,000		24,956
1.95%, 12/15/2018		25,000		25,191
3.30%, 4/22/2024		325,000		337,275
4.00%, 4/11/2043		275,000		274,744
4.30%, 4/22/2044		30,000		31,447
4.88%, 7/8/2040		50,000		56,206
5.00%, 10/25/2040		50,000		56,902

See accompanying notes to schedules of investments.

24

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Retail – (continued)
5.25%, 9/1/2035	$	25,000	$	29,486
6.20%, 4/15/2038		25,000		32,505
Walgreen Co. 3.10%, 9/15/2022		25,000		25,133
Walgreens Boots Alliance, Inc.:
1.75%, 5/30/2018		100,000		100,103
3.10%, 6/1/2023		100,000		99,994
3.30%, 11/18/2021		200,000		205,004
4.50%, 11/18/2034		25,000		24,945
4.65%, 6/1/2046		25,000		24,939
				3,681,799
Semiconductors – 0.3%
Applied Materials, Inc.:
3.90%, 10/1/2025		25,000		26,406
5.10%, 10/1/2035		50,000		55,935
Broadcom Corp./Broadcom Cayman Finance, Ltd.:
2.38%, 1/15/2020(e)		100,000		100,000
3.00%, 1/15/2022(e)		100,000		99,839
3.63%, 1/15/2024(e)		100,000		100,769
3.88%, 1/15/2027(e)		100,000		100,496
Intel Corp.:
2.45%, 7/29/2020		100,000		101,498
2.60%, 5/19/2026		225,000		215,676
3.30%, 10/1/2021		25,000		25,964
4.10%, 5/19/2046		20,000		19,942
4.80%, 10/1/2041		50,000		55,278
Lam Research Corp. 2.75%, 3/15/2020		25,000		25,280
NVIDIA Corp. 3.20%, 9/16/2026		50,000		48,470
QUALCOMM, Inc.:
2.25%, 5/20/2020		150,000		150,172
3.45%, 5/20/2025		50,000		50,717
4.80%, 5/20/2045		25,000		26,047
				1,202,489
Software – 0.7%
Adobe Systems, Inc. 3.25%, 2/1/2025		25,000		25,245
Electronic Arts, Inc. 3.70%, 3/1/2021		25,000		25,893
Fidelity National Information Services, Inc.:
3.63%, 10/15/2020		50,000		51,781
3.88%, 6/5/2024		25,000		25,646
Fiserv, Inc. 2.70%, 6/1/2020		100,000		101,072
Microsoft Corp.:
1.10%, 8/8/2019		100,000		98,883
1.55%, 8/8/2021		200,000		194,470
1.85%, 2/6/2020		250,000		250,485
2.00%, 11/3/2020		150,000		150,426
2.00%, 8/8/2023		50,000		48,065
2.40%, 2/6/2022		50,000		50,218
2.40%, 8/8/2026		200,000		189,070
3.13%, 11/3/2025		50,000		50,443
3.30%, 2/6/2027		30,000		30,450
3.45%, 8/8/2036		50,000		47,421
3.63%, 12/15/2023		25,000		26,343
3.70%, 8/8/2046		200,000		187,740
3.95%, 8/8/2056		75,000		69,962
4.00%, 2/12/2055		75,000		70,777
4.10%, 2/6/2037		50,000		51,483
4.20%, 11/3/2035		65,000		68,049
4.45%, 11/3/2045		25,000		26,435
5.20%, 6/1/2039		50,000		58,511
Series 30Y, 4.25%, 2/6/2047		150,000		153,910
Oracle Corp.:
1.90%, 9/15/2021		200,000		196,328
2.25%, 10/8/2019		75,000		75,936
2.38%, 1/15/2019		25,000		25,342
2.40%, 9/15/2023		200,000		194,570
2.50%, 5/15/2022		50,000		49,831
2.65%, 7/15/2026		45,000		42,755
2.95%, 5/15/2025		10,000		9,841
3.85%, 7/15/2036		150,000		146,470
3.90%, 5/15/2035		5,000		4,939
4.00%, 7/15/2046		180,000		171,506
4.30%, 7/8/2034		200,000		207,076
4.38%, 5/15/2055		10,000		9,734
				3,187,106
Telecommunications – 1.3%
America Movil SAB de CV 4.38%, 7/16/2042		50,000		47,856
AT&T, Inc.:
2.30%, 3/11/2019		25,000		25,121
2.45%, 6/30/2020		250,000		249,885
2.80%, 2/17/2021		325,000		325,803
3.60%, 2/17/2023		125,000		126,779
3.90%, 3/11/2024		25,000		25,439
4.13%, 2/17/2026		350,000		354,841
4.45%, 4/1/2024		25,000		26,193
4.50%, 5/15/2035		300,000		282,978
4.55%, 3/9/2049		208,000		186,555
4.75%, 5/15/2046		30,000		28,007
4.80%, 6/15/2044		50,000		47,071
5.25%, 3/1/2037		200,000		203,590
5.65%, 2/15/2047		150,000		158,280
6.30%, 1/15/2038		50,000		57,503
British Telecommunications PLC 2.35%, 2/14/2019		75,000		75,439
Cisco Systems, Inc.:
1.40%, 9/20/2019		200,000		198,382
1.85%, 9/20/2021		200,000		195,968
2.13%, 3/1/2019		25,000		25,252
2.20%, 2/28/2021		100,000		99,946
3.00%, 6/15/2022		25,000		25,554
3.50%, 6/15/2025		25,000		25,956
3.63%, 3/4/2024		25,000		26,221
5.50%, 1/15/2040		50,000		60,981
Deutsche Telekom International Finance B.V. 6.00%, 7/8/2019		100,000		108,402
Motorola Solutions, Inc. 4.00%, 9/1/2024		25,000		25,026

See accompanying notes to schedules of investments.

25

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
CORPORATE BONDS & NOTES – (continued)
Telecommunications – (continued)
Orange SA:
1.63%, 11/3/2019	$	150,000	$	147,694
2.75%, 2/6/2019		25,000		25,310
5.38%, 7/8/2019		100,000		106,928
5.50%, 2/6/2044		50,000		56,652
Rogers Communications, Inc.:
3.00%, 3/15/2023		30,000		29,851
5.00%, 3/15/2044		50,000		53,561
Telefonica Emisiones SAU:
3.19%, 4/27/2018		100,000		101,312
5.21%, 3/8/2047		150,000		152,097
7.05%, 6/20/2036		25,000		30,947
Telefonica Europe B.V. 8.25%, 9/15/2030		25,000		34,037
Telefonos de Mexico SAB de CV 5.50%, 11/15/2019		100,000		108,201
Verizon Communications, Inc.:
1.75%, 8/15/2021		350,000		334,814
2.63%, 8/15/2026		50,000		45,662
3.00%, 11/1/2021		50,000		50,094
3.50%, 11/1/2024		50,000		49,622
4.27%, 1/15/2036		28,000		25,872
4.40%, 11/1/2034		250,000		236,728
4.50%, 9/15/2020		250,000		266,308
4.52%, 9/15/2048		25,000		22,687
4.67%, 3/15/2055		250,000		224,015
4.81%, 3/15/2039(e)		100,000		97,742
4.86%, 8/21/2046		250,000		240,285
5.01%, 4/15/2049(e)		53,000		51,367
5.05%, 3/15/2034		135,000		137,171
5.15%, 9/15/2023		50,000		54,978
Vodafone Group PLC:
2.50%, 9/26/2022		50,000		48,852
2.95%, 2/19/2023		25,000		24,579
4.38%, 2/19/2043		75,000		68,553
				5,838,947
Toys/Games/Hobbies – 0.0%(a)
Mattel, Inc. 2.35%, 5/6/2019		25,000		25,062
Transportation – 0.4%
Burlington Northern Santa Fe LLC:
3.40%, 9/1/2024		100,000		102,706
3.75%, 4/1/2024		25,000		26,285
3.90%, 8/1/2046		100,000		96,012
4.45%, 3/15/2043		50,000		51,873
4.55%, 9/1/2044		50,000		52,496
4.90%, 4/1/2044		25,000		27,624
Canadian National Railway Co.:
2.75%, 3/1/2026		100,000		98,252
2.95%, 11/21/2024		50,000		50,357
3.20%, 8/2/2046		25,000		21,833
Canadian Pacific Railway Co. 4.80%, 9/15/2035		30,000		32,622
CSX Corp.:
3.40%, 8/1/2024		25,000		25,335
4.10%, 3/15/2044		75,000		72,016
FedEx Corp.:
3.90%, 2/1/2035		200,000		191,756
4.00%, 1/15/2024		25,000		26,430
4.55%, 4/1/2046		100,000		100,175
4.75%, 11/15/2045		25,000		25,660
Norfolk Southern Corp.:
2.90%, 6/15/2026		150,000		144,687
3.00%, 4/1/2022		25,000		25,318
4.45%, 6/15/2045		19,000		19,749
4.80%, 8/15/2043		25,000		27,158
Ryder System, Inc.:
Series MTN, 2.45%, 9/3/2019		25,000		25,109
Series MTN, 2.80%, 3/1/2022		100,000		100,023
Series MTN, 3.45%, 11/15/2021		100,000		102,750
Union Pacific Corp.:
2.75%, 3/1/2026		50,000		48,707
3.80%, 10/1/2051		52,000		48,506
4.05%, 3/1/2046		175,000		173,206
United Parcel Service, Inc.:
2.40%, 11/15/2026		30,000		28,578
2.45%, 10/1/2022		125,000		125,200
				1,870,423
Trucking & Leasing – 0.0%(a)
GATX Corp.:
2.50%, 3/15/2019		50,000		50,411
3.85%, 3/30/2027		50,000		49,737
				100,148
Water – 0.0%(a)
American Water Capital Corp.:
3.40%, 3/1/2025		25,000		25,582
4.30%, 12/1/2042		25,000		25,983
				51,565
TOTAL CORPORATE BONDS & NOTES (Cost $114,368,982)				113,026,224
FOREIGN GOVERNMENT OBLIGATIONS – 2.6%
Austria – 0.0%(a)
Oesterreichische Kontrollbank AG 1.88%, 1/20/2021		100,000		99,311
Canada – 0.5%
Canada Government International Bond 1.63%, 2/27/2019		50,000		50,285
Export Development Canada:
1.00%, 6/15/2018		50,000		49,839
1.00%, 9/13/2019		150,000		147,978
1.38%, 10/21/2021		50,000		48,464
1.50%, 5/26/2021		50,000		49,028
Province of Alberta Canada 1.90%, 12/6/2019		50,000		50,122
Province of British Columbia Canada:
2.25%, 6/2/2026		150,000		144,364
2.65%, 9/22/2021		50,000		51,162

See accompanying notes to schedules of investments.

26

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
FOREIGN GOVERNMENT OBLIGATIONS – (continued)
Canada – (continued)
Province of Manitoba Canada:
1.13%, 6/1/2018	$	25,000	$	24,922
2.13%, 6/22/2026		250,000		234,737
Province of Ontario Canada:
1.25%, 6/17/2019		200,000		197,926
1.63%, 1/18/2019		100,000		99,995
1.88%, 5/21/2020		250,000		249,297
2.40%, 2/8/2022		100,000		100,460
2.50%, 9/10/2021		25,000		25,294
2.50%, 4/27/2026		100,000		97,858
4.40%, 4/14/2020		50,000		53,558
Province of Quebec Canada:
2.50%, 4/20/2026		250,000		244,662
2.63%, 2/13/2023		250,000		252,092
2.75%, 8/25/2021		50,000		51,153
				2,223,196
Chile – 0.0%(a)
Chile Government International Bond 3.13%, 1/21/2026		50,000		50,508
Colombia – 0.1%
Colombia Government International Bond:
4.00%, 2/26/2024		275,000		283,201
5.63%, 2/26/2044		200,000		217,796
				500,997
Germany – 0.1%
Kreditanstalt fuer Wiederaufbau:
1.25%, 9/30/2019		200,000		198,166
2.13%, 3/7/2022		250,000		249,642
				447,808
Hungary – 0.1%
Hungary Government International Bond:
5.38%, 3/25/2024		150,000		167,063
6.38%, 3/29/2021		150,000		168,937
				336,000
Israel – 0.0%(a)
Israel Government International Bond:
2.88%, 3/16/2026		100,000		98,141
4.00%, 6/30/2022		50,000		53,210
				151,351
Italy – 0.0%(a)
Italy Government International Bond 5.38%, 6/15/2033		50,000		54,126
Japan – 0.1%
Japan Bank for International Cooperation:
1.50%, 7/21/2021		25,000		23,980
1.75%, 7/31/2018		100,000		100,029
1.88%, 4/20/2021		225,000		220,003
2.38%, 4/20/2026		200,000		192,180
				536,192
Mexico – 0.2%
Mexico Government International Bond:
3.50%, 1/21/2021		200,000		207,454
3.63%, 3/15/2022		100,000		102,924
4.00%, 10/2/2023		80,000		82,465
4.13%, 1/21/2026		125,000		128,609
5.55%, 1/21/2045		300,000		325,350
6.05%, 1/11/2040		30,000		34,360
4.75%, 3/8/2044		100,000		97,464
				978,626
Panama – 0.1%
Panama Government International Bond:
3.88%, 3/17/2028		200,000		203,194
6.70%, 1/26/2036		50,000		63,289
				266,483
Peru – 0.1%
Peruvian Government International Bond:
4.13%, 8/25/2027		150,000		161,516
5.63%, 11/18/2050		50,000		59,661
6.55%, 3/14/2037		25,000		32,361
				253,538
Philippines – 0.1%
Philippine Government International Bond:
3.95%, 1/20/2040		100,000		102,921
4.00%, 1/15/2021		100,000		106,440
4.20%, 1/21/2024		100,000		108,236
5.00%, 1/13/2037		150,000		175,230
7.75%, 1/14/2031		100,000		142,710
				635,537
Poland – 0.1%
Poland Government International Bond:
3.00%, 3/17/2023		50,000		49,938
3.25%, 4/6/2026		25,000		24,781
4.00%, 1/22/2024		150,000		157,313
5.00%, 3/23/2022		50,000		54,937
				286,969
Senegal – 0.7%
African Development Bank:
1.88%, 3/16/2020		200,000		200,908
1.00%, 11/2/2018		25,000		24,835
Asian Development Bank:
2.00%, 2/16/2022		150,000		149,685
2.63%, 1/12/2027		50,000		50,361
Council Of Europe Development Bank 1.88%, 1/27/2020		100,000		100,585
European Bank for Reconstruction & Development 1.13%, 8/24/2020		100,000		97,686

See accompanying notes to schedules of investments.

27

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
FOREIGN GOVERNMENT OBLIGATIONS – (continued)
Senegal – (continued)
European Investment Bank:
1.25%, 12/16/2019	$	375,000	$	370,391
1.63%, 6/15/2021		150,000		147,294
1.75%, 5/15/2020		150,000		149,850
2.13%, 4/13/2026		100,000		95,887
Inter-American Development Bank:
1.00%, 5/13/2019		125,000		123,786
1.88%, 3/15/2021		250,000		249,533
2.13%, 1/18/2022		100,000		100,422
International Bank for Reconstruction & Development:
2.00%, 1/26/2022		100,000		99,696
1.13%, 11/27/2019		50,000		49,390
1.25%, 7/26/2019		350,000		347,917
1.38%, 9/20/2021		300,000		291,492
1.88%, 4/21/2020		200,000		200,976
Nordic Investment Bank 2.13%, 2/1/2022		200,000		200,330
				3,051,024
South Africa – 0.1%
Republic of South Africa Government International Bond 5.00%, 10/12/2046		75,000		71,062
South Africa Government International Bond:
4.30%, 10/12/2028		50,000		46,938
4.88%, 4/14/2026		50,000		50,250
6.88%, 5/27/2019		100,000		108,625
				276,875
South Korea – 0.1%
Export-Import Bank of Korea:
2.13%, 2/11/2021		100,000		97,952
2.38%, 4/21/2027		25,000		23,343
3.25%, 11/10/2025		150,000		151,146
5.13%, 6/29/2020		100,000		108,326
Korea Development Bank 2.50%, 1/13/2021		100,000		99,418
Korea International Bond 7.13%, 4/16/2019		100,000		110,493
				590,678
Sweden – 0.1%
Svensk Exportkredit AB:
1.13%, 8/28/2019		150,000		147,841
1.25%, 4/12/2019		100,000		99,172
				247,013
United States – 0.1%
Iraq Government AID Bond 2.15%, 1/18/2022		200,000		199,304
Uruguay – 0.0%(a)
Uruguay Government International Bond:
4.38%, 10/27/2027		25,000		26,059
5.10%, 6/18/2050		175,000		168,699
				194,758
TOTAL FOREIGN GOVERNMENT OBLIGATIONS (Cost $11,454,254)				11,380,294
U.S. GOVERNMENT AGENCY OBLIGATIONS – 29.7%
Federal Farm Credit Banks:
1.50%, 12/19/2019		50,000		49,887
1.55%, 1/10/2020		300,000		299,628
3.50%, 12/20/2023		50,000		53,548
Federal Home Loan Bank:
0.88%, 6/29/2018		150,000		149,424
0.88%, 10/1/2018		200,000		198,918
1.13%, 6/21/2019		225,000		223,603
1.13%, 7/14/2021		100,000		96,793
1.15%, 6/22/2018		50,000		49,961
1.25%, 1/16/2019		250,000		249,705
1.38%, 11/15/2019		750,000		746,580
1.38%, 2/18/2021		100,000		98,418
1.88%, 3/8/2019		50,000		50,471
1.88%, 11/29/2021		200,000		199,288
2.25%, 6/11/2021		75,000		75,886
2.88%, 9/13/2024		50,000		51,272
5.50%, 7/15/2036		35,000		46,339
Federal Home Loan Mortgage Corp.:
0.88%, 10/12/2018		750,000		745,942
0.88%, 7/19/2019		50,000		49,396
1.05%, 7/27/2018		150,000		149,499
1.10%, 9/13/2018		25,000		24,911
1.25%, 7/26/2019		250,000		248,465
1.25%, 8/1/2019		100,000		99,571
1.25%, 10/2/2019		75,000		74,578
2.38%, 1/13/2022		325,000		330,353
2.50%, 10/1/2029		65,605		66,096
2.50%, 1/1/2031		126,054		126,242
2.50%, 5/1/2031		202,579		202,923
2.50%, 6/1/2031		366,900		367,523
2.50%, 10/1/2031		334,677		335,246
2.50%, 12/1/2031		388,708		389,369
2.50%, 2/1/2032		395,596		396,188
3.00%, 12/1/2030		166,257		170,818
3.00%, 5/1/2031		133,309		136,878
3.00%, 12/1/2031		633,373		650,331
3.00%, 2/1/2032		988,875		1,015,151
3.00%, 5/1/2035		87,704		89,094
3.00%, 6/1/2036		375,969		379,976
3.00%, 6/1/2045		127,992		127,126
3.00%, 8/1/2045		259,589		257,835
3.00%, 4/1/2046		565,971		561,084
3.00%, 6/1/2046		189,524		187,888
3.00%, 8/1/2046		962,732		954,420
3.00%, 9/1/2046		315,302		312,579
3.00%, 10/1/2046		537,888		533,244

See accompanying notes to schedules of investments.

28

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
U.S. GOVERNMENT AGENCY OBLIGATIONS – (continued)
3.00%, 11/1/2046	$	1,699,233	$	1,684,561
3.00%, 12/1/2046		518,567		514,090
3.00%, 1/1/2047		1,090,374		1,080,960
3.00%, 2/1/2047		1,492,752		1,479,965
3.50%, 11/1/2034		388,948		404,339
3.50%, 4/1/2042		428,867		441,266
3.50%, 8/1/2043		872,122		895,995
3.50%, 11/1/2044		76,077		77,956
3.50%, 1/1/2045		98,390		100,711
3.50%, 7/1/2045		166,665		170,885
3.50%, 10/1/2045		98,184		100,500
3.50%, 12/1/2045		1,119,738		1,146,151
3.50%, 1/1/2046		145,231		148,632
3.50%, 3/1/2046		299,735		306,749
3.50%, 4/1/2046		443,623		454,004
3.50%, 6/1/2046		510,209		522,148
3.50%, 12/1/2046		1,478,105		1,512,693
3.50%, 2/1/2047		995,069		1,018,370
3.50%, 3/1/2047		998,027		1,021,359
3.75%, 3/27/2019		150,000		156,999
4.00%, 4/1/2025		96,530		101,468
4.00%, 4/1/2042		59,541		62,722
4.00%, 6/1/2042		148,293		156,245
4.00%, 12/1/2044		82,685		86,973
4.00%, 4/1/2045		66,866		70,222
4.00%, 10/1/2045		147,934		155,359
4.00%, 12/1/2045		251,794		264,432
4.00%, 1/1/2046		1,016,658		1,067,996
4.00%, 2/1/2046		378,368		397,474
4.00%, 1/1/2047		985,581		1,035,349
4.00%, 2/1/2047		495,654		520,980
4.50%, 5/1/2044		168,456		180,655
4.50%, 12/1/2045		912,999		979,120
4.50%, 9/1/2046		719,634		774,112
5.00%, 7/1/2041		261,531		284,867
5.50%, 8/1/2038		800,575		890,150
6.00%, 7/1/2040		291,295		327,777
6.25%, 7/15/2032		210,000		291,957
Series GMTN, 0.75%, 4/9/2018		50,000		49,802
Series K025, Class A2, 2.68%, 10/25/2022		125,000		126,707
Series K028, Class A2, 3.11%, 2/25/2023		100,000		103,431
Series K040, Class A2, 3.24%, 9/25/2024		75,000		77,716
Series K049, Class A2, 3.01%, 7/25/2025		200,000		203,090
Series K054, Class A2, 2.75%, 1/25/2026		500,000		495,120
Series K062, Class A2, 3.41%, 12/25/2026		400,000		415,120
Series K716, Class A2, 3.13%, 6/25/2021		250,000		258,767
Series K718, Class A2, 2.79%, 1/25/2022		500,000		510,155
TBA, 3.00%, 4/1/2032(f)		3,000,000		3,076,172
TBA, 3.50%, 4/1/2047(f)		1,000,000		1,022,734
TBA, 4.00%, 4/1/2047(f)		1,400,000		1,468,578
Federal National Mortgage Association:
0.88%, 5/21/2018		50,000		49,851
1.00%, 8/28/2019		200,000		197,820
1.00%, 10/24/2019		200,000		197,526
1.13%, 7/20/2018		600,000		599,538
1.25%, 5/6/2021		275,000		268,350
1.38%, 1/28/2019		750,000		750,630
1.38%, 10/7/2021		325,000		316,904
1.50%, 6/22/2020		100,000		99,623
1.75%, 9/12/2019		75,000		75,495
1.88%, 9/24/2026		350,000		325,846
2.00%, 1/5/2022		150,000		150,069
2.00%, 11/1/2031		194,758		189,614
2.13%, 4/24/2026		50,000		47,799
2.50%, 3/1/2029		388,897		393,305
2.50%, 2/1/2031		194,010		194,230
2.50%, 10/1/2031		313,199		313,502
2.50%, 12/1/2031		559,767		560,309
2.50%, 1/1/2032		187,587		187,802
3.00%, 10/1/2028		139,095		143,058
3.00%, 8/1/2029		69,303		71,209
3.00%, 5/1/2030		444,429		457,679
3.00%, 6/1/2030		93,291		95,802
3.00%, 9/1/2030		73,716		75,700
3.00%, 11/1/2030		151,025		155,091
3.00%, 12/1/2030		106,100		108,956
3.00%, 4/1/2031		372,210		381,984
3.00%, 12/1/2031		555,578		570,167
3.00%, 2/1/2032		986,513		1,012,461
3.00%, 6/1/2036		115,476		116,785
3.00%, 8/1/2036		571,094		577,564
3.00%, 10/1/2036		291,418		294,720
3.00%, 12/1/2036		491,087		496,650
3.00%, 7/1/2043		112,397		112,065
3.00%, 1/1/2045		1,586,775		1,582,078
3.00%, 9/1/2045		108,703		108,037
3.00%, 11/1/2045		409,728		407,217
3.00%, 12/1/2045		146,684		145,785
3.00%, 5/1/2046		1,037,826		1,029,598
3.00%, 7/1/2046		1,191,454		1,182,007
3.00%, 10/1/2046		293,754		291,425
3.00%, 12/1/2046		493,466		489,553
3.00%, 1/1/2047		3,174,251		3,149,084
3.50%, 11/1/2025		68,670		71,624
3.50%, 1/1/2027		77,608		80,946
3.50%, 5/1/2029		78,565		81,982
3.50%, 10/1/2029		62,181		64,886
3.50%, 2/1/2031		839,939		876,488
3.50%, 12/1/2035		82,602		85,761
3.50%, 1/1/2037		494,893		512,978
3.50%, 2/1/2037		745,195		772,373
3.50%, 2/1/2041		170,441		175,405
3.50%, 10/1/2044		61,639		63,170
3.50%, 1/1/2045		176,259		180,561
3.50%, 5/1/2045		74,465		76,239
3.50%, 8/1/2045		240,108		245,829
3.50%, 11/1/2045		98,364		100,707
3.50%, 12/1/2045		1,196,227		1,224,727
3.50%, 1/1/2046		894,105		915,406

See accompanying notes to schedules of investments.

29

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
U.S. GOVERNMENT AGENCY OBLIGATIONS – (continued)
3.50%, 2/1/2046	$	1,052,804	$	1,077,661
3.50%, 4/1/2046		749,687		767,387
3.50%, 5/1/2046		1,114,608		1,140,924
3.50%, 6/1/2046		300,136		307,222
3.50%, 7/1/2046		696,040		712,473
3.50%, 1/1/2047		940,828		963,040
3.50%, 2/1/2047		944,697		966,892
3.50%, 3/1/2047		996,895		1,020,785
4.00%, 8/1/2018		39,837		41,181
4.00%, 1/1/2019		33,828		34,970
4.00%, 9/1/2019		70,789		73,178
4.00%, 3/1/2021		55,125		57,007
4.00%, 10/1/2033		253,577		269,463
4.00%, 12/1/2040		94,108		99,196
4.00%, 2/1/2043		556,767		586,509
4.00%, 10/1/2043		1,320,359		1,391,095
4.00%, 11/1/2043		452,801		476,156
4.00%, 12/1/2043		411,507		432,733
4.00%, 10/1/2044		104,719		110,146
4.00%, 3/1/2045		98,812		103,800
4.00%, 7/1/2045		90,464		95,031
4.00%, 9/1/2045		384,350		403,754
4.00%, 12/1/2045		199,245		209,305
4.00%, 4/1/2046		463,265		486,739
4.00%, 7/1/2046		584,647		614,271
4.00%, 11/1/2046		891,342		936,506
4.00%, 12/1/2046		977,862		1,027,409
4.50%, 4/1/2018		18,247		18,503
4.50%, 5/1/2020		26,442		26,813
4.50%, 12/1/2040		250,906		269,696
4.50%, 1/1/2042		109,274		117,654
4.50%, 9/1/2043		219,519		235,881
4.50%, 11/1/2043		107,168		115,034
4.50%, 5/1/2044		452,959		486,180
4.50%, 6/1/2044		134,847		144,736
4.50%, 2/1/2046		432,617		465,014
4.50%, 3/1/2046		1,484,407		1,593,275
4.50%, 7/1/2046		609,854		655,970
5.00%, 6/1/2040		459,049		502,459
5.00%, 7/1/2041		84,360		92,337
5.00%, 5/1/2042		92,796		101,571
5.00%, 11/1/2044		1,179,864		1,290,679
5.00%, 1/1/2045		120,129		131,863
5.50%, 2/1/2037		51,033		56,878
5.50%, 4/1/2038		243,215		270,715
5.50%, 9/1/2040		74,267		82,622
5.50%, 9/1/2041		120,409		134,023
5.50%, 5/1/2044		264,530		296,003
5.63%, 7/15/2037		80,000		107,657
6.63%, 11/15/2030		115,000		162,144
7.25%, 5/15/2030		75,000		109,954
Series 2011-M5, Class A2, 2.94%, 7/25/2021		139,775		143,521
Series 2011-M7, Class A2, 2.58%, 9/25/2018		128,299		128,786
Series 2013-M12, Class APT, 2.40%, 3/25/2023(c)		38,971		38,951
Series 2013-M3, Class A2, 2.51%, 11/25/2022(c)		150,000		149,790
Series 2014-M3, Class A2, 3.47%, 1/25/2024(c)		50,000		52,412
Series 2015-M8, Class A2, 2.90%, 1/25/2025(c)		250,000		251,182
TBA, 3.00%, 4/1/2032(f)		2,500,000		2,562,695
TBA, 3.00%, 4/1/2047(f)		2,175,000		2,159,877
TBA, 3.50%, 4/1/2032(f)		500,000		520,312
TBA, 3.50%, 4/1/2047(f)		3,600,000		3,682,406
TBA, 4.00%, 4/1/2047(f)		1,350,000		1,416,129
Government National Mortgage Association:
3.00%, 1/20/2043		873,327		884,177
3.00%, 5/20/2043		442,888		448,789
3.00%, 12/20/2044		98,687		99,730
3.00%, 3/20/2045		54,988		55,552
3.00%, 4/20/2045		159,250		160,883
3.00%, 6/20/2045		79,784		80,603
3.00%, 7/20/2045		143,204		144,673
3.00%, 8/20/2045		126,142		127,436
3.00%, 4/20/2046		131,519		132,760
3.00%, 5/20/2046		225,432		227,559
3.00%, 7/20/2046		141,532		142,868
3.00%, 8/20/2046		455,872		460,175
3.00%, 9/20/2046		316,738		319,728
3.00%, 10/20/2046		319,645		322,662
3.00%, 11/20/2046		568,551		573,917
3.00%, 12/20/2046		2,208,615		2,229,460
3.00%, 2/20/2047		1,047,586		1,058,005
3.50%, 10/20/2042		716,285		746,560
3.50%, 5/20/2043		106,535		110,989
3.50%, 9/20/2043		74,251		77,355
3.50%, 11/20/2043		595,003		619,875
3.50%, 10/20/2044		81,667		84,909
3.50%, 12/20/2044		56,462		58,704
3.50%, 3/20/2045		53,759		55,832
3.50%, 4/20/2045		158,658		164,776
3.50%, 6/20/2045		106,941		111,064
3.50%, 10/20/2045		113,192		117,557
3.50%, 1/20/2046		1,656,277		1,720,143
3.50%, 3/20/2046		361,810		375,474
3.50%, 4/20/2046		190,693		197,894
3.50%, 5/20/2046		198,434		205,928
3.50%, 6/20/2046		431,535		447,832
3.50%, 7/20/2046		485,980		504,333
3.50%, 10/20/2046		922,019		956,839
3.50%, 11/20/2046		589,026		611,271
3.50%, 1/20/2047		1,344,593		1,395,371
4.00%, 4/15/2040		84,993		90,030
4.00%, 2/20/2042		36,554		38,800
4.00%, 7/20/2042		24,601		26,112
4.00%, 7/15/2044		88,018		93,203
4.00%, 8/20/2044		53,339		56,565
4.00%, 10/20/2044		483,545		512,791
4.00%, 5/15/2045		94,442		99,834
4.00%, 6/15/2045		201,287		212,778
4.00%, 8/20/2045		59,846		63,304
4.00%, 11/20/2045		200,797		212,397
4.00%, 2/20/2046		560,861		593,261
4.00%, 5/20/2046		595,297		629,419
4.00%, 6/20/2046		407,552		430,913

See accompanying notes to schedules of investments.

30

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
U.S. GOVERNMENT AGENCY OBLIGATIONS – (continued)
4.00%, 1/20/2047	$	1,343,670	$	1,420,691
4.50%, 1/20/2044		228,282		244,818
4.50%, 11/20/2044		75,487		80,699
4.50%, 12/20/2044		61,158		65,381
4.50%, 4/20/2046		379,016		405,185
4.50%, 6/20/2046		286,958		306,771
4.50%, 7/20/2046		360,751		385,659
5.00%, 6/15/2040		65,969		72,290
5.00%, 10/15/2041		120,281		132,295
5.00%, 3/20/2044		106,385		115,009
5.00%, 12/20/2045		388,114		419,575
5.50%, 10/20/2043		91,794		102,076
TBA, 3.00%, 4/1/2047(f)		2,275,000		2,298,105
TBA, 3.50%, 4/1/2047(f)		4,400,000		4,561,219
TBA, 4.00%, 4/1/2047(f)		1,650,000		1,742,684
TBA, 4.50%, 4/1/2047(f)		1,000,000		1,068,125
Tennessee Valley Authority:
2.88%, 9/15/2024		100,000		103,061
2.88%, 2/1/2027		50,000		50,224
3.50%, 12/15/2042		75,000		75,329
5.25%, 9/15/2039		150,000		189,610
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $130,879,945)				129,726,451
U.S. TREASURY OBLIGATIONS – 34.6%
Treasury Bonds:
2.25%, 8/15/2046		1,425,000		1,206,419
2.50%, 2/15/2045		840,000		755,000
2.50%, 2/15/2046		100,000		89,656
2.50%, 5/15/2046		700,000		627,067
2.75%, 8/15/2042		150,000		143,049
2.75%, 11/15/2042		500,000		476,295
2.88%, 5/15/2043		2,575,000		2,507,870
2.88%, 8/15/2045		80,000		77,604
2.88%, 11/15/2046		2,275,000		2,208,092
3.00%, 5/15/2042		175,000		175,021
3.00%, 11/15/2044		175,000		174,262
3.00%, 5/15/2045		375,000		372,937
3.00%, 2/15/2047		350,000		348,842
3.13%, 11/15/2041		800,000		819,032
3.13%, 2/15/2042		125,000		127,950
3.13%, 8/15/2044		500,000		509,910
3.38%, 5/15/2044		350,000		373,573
3.63%, 8/15/2043		850,000		946,543
3.63%, 2/15/2044		475,000		529,345
3.75%, 8/15/2041		700,000		794,213
3.75%, 11/15/2043		2,525,000		2,873,349
4.38%, 2/15/2038		275,000		343,269
4.38%, 11/15/2039		350,000		434,504
4.38%, 5/15/2040		575,000		714,052
4.38%, 5/15/2041		800,000		996,376
4.63%, 2/15/2040		1,190,000		1,528,793
4.75%, 2/15/2037		2,025,000		2,644,286
5.25%, 11/15/2028		450,000		575,073
Treasury Notes:
0.63%, 6/30/2018		1,500,000		1,490,730
0.75%, 4/15/2018		200,000		199,286
0.75%, 4/30/2018		2,000,000		1,992,480
0.75%, 7/31/2018		5,000,000		4,973,850
0.75%, 8/31/2018		3,750,000		3,728,588
0.88%, 5/31/2018		2,000,000		1,994,300
0.88%, 7/15/2018		350,000		348,845
0.88%, 10/15/2018		500,000		497,710
0.88%, 4/15/2019		150,000		148,782
0.88%, 6/15/2019		4,500,000		4,457,070
0.88%, 9/15/2019		825,000		814,910
1.00%, 5/31/2018		500,000		499,275
1.00%, 8/15/2018		300,000		299,391
1.00%, 9/15/2018		100,000		99,757
1.00%, 11/30/2018		1,500,000		1,494,945
1.00%, 8/31/2019		500,000		495,635
1.00%, 9/30/2019		750,000		742,830
1.00%, 10/15/2019		1,000,000		990,040
1.13%, 6/15/2018		150,000		149,994
1.13%, 1/15/2019		2,050,000		2,046,228
1.13%, 1/31/2019		1,500,000		1,497,075
1.13%, 2/28/2019		750,000		748,305
1.13%, 4/30/2020		100,000		98,743
1.13%, 2/28/2021		850,000		829,413
1.13%, 6/30/2021		2,250,000		2,185,200
1.13%, 7/31/2021		1,175,000		1,139,691
1.13%, 8/31/2021		700,000		678,251
1.13%, 9/30/2021		1,300,000		1,257,958
1.25%, 12/15/2018		750,000		750,412
1.25%, 12/31/2018		5,000,000		5,002,700
1.25%, 1/31/2020		5,250,000		5,216,715
1.25%, 3/31/2021		200,000		195,914
1.25%, 10/31/2021		1,400,000		1,360,926
1.25%, 7/31/2023		250,000		236,650
1.38%, 9/30/2018		100,000		100,288
1.38%, 2/28/2019		500,000		501,175
1.38%, 12/15/2019		6,000,000		5,988,840
1.38%, 2/29/2020		500,000		498,140
1.38%, 4/30/2020		350,000		348,194
1.38%, 5/31/2020		500,000		496,910
1.38%, 8/31/2020		3,200,000		3,171,296
1.38%, 9/30/2020		550,000		544,561
1.38%, 10/31/2020		1,100,000		1,088,010
1.38%, 1/31/2021		5,500,000		5,423,880
1.38%, 4/30/2021		525,000		516,222
1.38%, 5/31/2021		275,000		270,141
1.38%, 6/30/2023		2,500,000		2,388,275
1.38%, 9/30/2023		550,000		523,534
1.50%, 12/31/2018		750,000		753,562
1.50%, 5/31/2020		300,000		299,277
1.50%, 1/31/2022		450,000		441,185
1.50%, 2/28/2023		5,000,000		4,833,650
1.50%, 8/15/2026		1,200,000		1,110,552
1.63%, 8/31/2019		800,000		804,792
1.63%, 12/31/2019		750,000		753,487
1.63%, 6/30/2020		75,000		75,065
1.63%, 7/31/2020		5,600,000		5,601,008
1.63%, 5/31/2023		100,000		97,079
1.63%, 2/15/2026		925,000		869,759
1.63%, 5/15/2026		1,350,000		1,266,462
1.75%, 10/31/2018		500,000		504,355
1.75%, 10/31/2020		650,000		651,521
1.75%, 11/30/2021		1,500,000		1,490,400

See accompanying notes to schedules of investments.

31

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
U.S. TREASURY OBLIGATIONS – (continued)
1.75%, 2/28/2022	$	300,000	$	297,384
1.75%, 3/31/2022		250,000		247,655
1.75%, 4/30/2022		300,000		296,958
1.75%, 1/31/2023		2,925,000		2,870,624
1.75%, 5/15/2023		250,000		244,562
1.88%, 3/31/2022		2,000,000		1,994,940
1.88%, 5/31/2022		100,000		99,533
1.88%, 8/31/2022		150,000		148,851
2.00%, 2/28/2021		750,000		756,623
2.00%, 5/31/2021		350,000		352,667
2.00%, 8/31/2021		300,000		301,677
2.00%, 11/15/2021		500,000		502,340
2.00%, 12/31/2021		6,000,000		6,023,940
2.00%, 7/31/2022		100,000		99,980
2.00%, 2/15/2023		500,000		497,395
2.00%, 2/15/2025		625,000		611,269
2.00%, 8/15/2025		500,000		486,920
2.00%, 11/15/2026		3,250,000		3,139,825
2.13%, 8/31/2020		1,650,000		1,676,136
2.13%, 6/30/2022		4,500,000		4,531,095
2.13%, 12/31/2022		650,000		651,631
2.13%, 11/30/2023		1,000,000		996,570
2.13%, 5/15/2025		2,350,000		2,314,750
2.25%, 12/31/2023		3,600,000		3,612,960
2.25%, 1/31/2024		1,000,000		1,003,170
2.25%, 11/15/2024		1,675,000		1,670,829
2.25%, 11/15/2025		975,000		966,605
2.25%, 2/15/2027		500,000		493,665
2.63%, 8/15/2020		150,000		154,824
2.63%, 11/15/2020		250,000		258,160
2.75%, 2/15/2024		100,000		103,473
4.00%, 8/15/2018		250,000		259,757
TOTAL U.S. TREASURY OBLIGATIONS (Cost $153,394,896)				151,113,369
MUNICIPAL BONDS & NOTES – 0.5%
California – 0.1%
California, State General Obligation:
7.50%, 4/1/2034		100,000		141,678
7.55%, 4/1/2039		100,000		146,659
Los Angeles, CA, Department of Water & Power Revenue 5.72%, 7/1/2039		100,000		124,331
Los Angeles, CA, Unified School District, General Obligation 5.75%, 7/1/2034		25,000		30,935
San Francisco, CA, Bay Area Toll Authority, Toll Bridge Revenue 6.91%, 10/1/2050		25,000		35,941
University of California, Revenue Series H, 6.55%, 5/15/2048		50,000		65,480
				545,024
Florida – 0.1%
State Board of Administration Finance Corp. Series A, 2.64%, 7/1/2021		150,000		151,155
State Board of Administration Finance Corp., Revenue Series A, 3.00%, 7/1/2020		100,000		102,790
				253,945
Georgia – 0.1%
Georgia, Municipal Electric Authority Revenue 6.66%, 4/1/2057		165,000		185,417
Illinois – 0.0%(a)
State of Illinois:
5.10%, 6/1/2033		50,000		45,621
7.35%, 7/1/2035		100,000		106,706
				152,327
Massachusetts – 0.0%(a)
Commonwealth of Massachusetts, State General Obligation Series E, 4.20%, 12/1/2021		100,000		106,597
New Jersey – 0.0%(a)
New Jersey, State Turnpike Authority Revenue Series A, 7.10%, 1/1/2041		100,000		139,560
New York – 0.1%
New York, NY, City Municipal Water Finance Authority, Water & Sewer System Revenue 5.44%, 6/15/2043		25,000		30,905
Port Authority of New York & New Jersey:
4.46%, 10/1/2062		50,000		52,689
5.65%, 11/1/2040		100,000		123,955
Series 192, 4.81%, 10/15/2065		25,000		27,358
				234,907
Ohio – 0.1%
American Municipal Power Inc 7.83%, 2/15/2041		150,000		215,348
Pennsylvania – 0.0%(a)
Commonwealth Financing Authority Series A, 4.14%, 6/1/2038		125,000		121,214
Texas – 0.0%(a)
Dallas, TX, Area Rapid Transit, Sales Tax Revenue 5.02%, 12/1/2048		100,000		115,063
TOTAL MUNICIPAL BONDS & NOTES (Cost $2,138,539)				2,069,402

See accompanying notes to schedules of investments.

32

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
ASSET-BACKED SECURITIES – 0.3%
Automobile – 0.1%
AmeriCredit Automobile Receivables Trust 2015-3 Series 2015-3, Class B, 2.08%, 9/8/2020	$	50,000	$	50,209
CarMax Auto Owner Trust 2016-1 Series 2016-1, Class A3, ABS, 1.61%, 11/16/2020		211,000		210,840
Ford Credit Auto Owner Trust 2016-C Series 2016-C, Class A4, ABS, 1.40%, 2/15/2022		200,000		196,493
Honda Auto Receivables 2015-3 Owner Trust Series 2015-3, Class A4, ABS, 1.56%, 10/18/2021		112,000		111,804
Nissan Auto Receivables 2016-B Owner Trust Series 2016-B, Class A3, ABS, 1.32%, 1/15/2021		169,000		167,990
				737,336
Credit Card – 0.2%
Capital One Multi-Asset Execution Trust Series 2016-A5, Class A5, ABS, 1.66%, 6/17/2024		200,000		195,237
Chase Issuance Trust Series 2015-A7, Class A7, ABS, 1.62%, 7/15/2020		400,000		400,400
Citibank Credit Card Issuance Trust Series 2014-A1, Class A1, 2.88%, 1/23/2023		100,000		102,704
Discover Card Execution Note Trust Series 2016-A1, Class A1, ABS, 1.64%, 7/15/2021		100,000		99,969
				798,310
TOTAL ASSET-BACKED SECURITIES (Cost $1,540,017)				1,535,646
MORTGAGE-BACKED SECURITIES – 0.9%
Banc of America Commercial Mortgage Trust 2015-UBS7 Series 2015-UBS7, Class A4, 3.71%, 9/15/2048		100,000		103,880
Citigroup Commercial Mortgage Trust 2013-GC11 Series 2013-GC11, Class A4, 3.09%, 4/10/2046		75,000		76,425
Citigroup Commercial Mortgage Trust 2015-GC33 Series 2015-GC33, Class A4, 3.78%, 9/10/2058		300,000		311,619
COMM 2013-CCRE8 Mortgage Trust Series 2013-CR8, Class A4, 3.33%, 6/10/2046		65,000		66,854
COMM 2014-CCRE16 Mortgage Trust Series 2014-CR16, Class A4, 4.05%, 4/10/2047		100,000		105,922
COMM 2014-UBS6 Mortgage Trust Series 2014-UBS6, Class A5, 3.64%, 12/10/2047		100,000		102,759
COMM 2015-LC21 Mortgage Trust Series 2015-LC21, Class A4, 3.71%, 7/10/2048		50,000		51,669
Commercial Mortgage Pass Through Certificates Series 2014-CR14, Class A3, 3.96%, 2/10/2047		400,000		423,892
GS Mortgage Securities Trust 2013-GC13 Series 2013-GC13, Class A5, 4.03%, 7/10/2046(c)		80,000		86,096
GS Mortgage Securities Trust 2013-GC16 Series 2013-GC16, Class A3, 4.24%, 11/10/2046		100,000		107,676
GS Mortgage Securities Trust 2013-GCJ12 Series 2013-GC12, Class AS, 3.38%, 6/10/2046		150,000		150,264
GS Mortgage Securities Trust 2016-GS3 Series 2016-GS3, Class A4, 2.85%, 10/10/2049		200,000		193,870
JP Morgan Chase Commercial Mortgage Securities Trust 2013-C16 Series 2013-C16, Class A4, 4.17%, 12/15/2046		60,000		64,293
JPMBB Commercial Mortgage Securities Trust 2014-C18 Series 2014-C18, Class AS, VRN, 4.44%, 2/15/2047(c)		50,000		53,253
JPMBB Commercial Mortgage Securities Trust 2015-C29 Series 2015-C29, Class A4, 3.61%, 5/15/2048		100,000		102,573
JPMBB Commercial Mortgage Securities Trust 2015-C33 Series 2015-C33, Class A4, 3.77%, 12/15/2048		100,000		103,645
JPMBB Commercial Mortgage Securities Trust 2016-C1 Series 2016-C1, Class B, VRN, 4.75%, 3/15/2049(c)		300,000		323,661
Morgan Stanley Bank of America Merrill Lynch Trust Series 2015-C20, Class A4, 3.25%, 2/15/2048		200,000		200,950
Morgan Stanley Bank of America Merrill Lynch Trust 2012-C6 Series 2012-C6, Class A4, 2.86%, 11/15/2045		200,000		201,922

See accompanying notes to schedules of investments.

33

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Principal Amount		Value
Morgan Stanley Bank of America Merrill Lynch Trust 2016-C29 Series 2016-C29, Class A2, 2.79%, 5/15/2049	$	200,000	$	202,916
Wells Fargo Commercial Mortgage Trust 2014-LC18 Series 2014-LC18, Class ASB, 3.24%, 12/15/2047		225,000		231,923
Wells Fargo Commercial Mortgage Trust 2015-C31 Series 2015-C31, Class A3, 3.43%, 11/15/2048		100,000		101,278
Wells Fargo Commercial Mortgage Trust 2015-P2 Series 2015-P2, Class A3, 3.54%, 12/15/2048		300,000		306,549
WFRBS Commercial Mortgage Trust 2014-C19:
Series 2014-C19, Class A3, 3.66%, 3/15/2047		75,000		78,310
Series 2014-C19, Class A4, 3.83%, 3/15/2047		110,000		115,446
WFRBS Commercial Mortgage Trust 2014-C21 Series 2014-C21, Class A2, 2.92%, 8/15/2047		120,000		122,190
WFRBS Commercial Mortgage Trust 2014-LC14 Series 2014-LC14, Class A5, 4.05%, 3/15/2047		100,000		106,082
TOTAL MORTGAGE-BACKED SECURITIES (Cost $4,186,577)				4,095,917
SHORT-TERM INVESTMENT – 7.7%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(g)(h) (Cost $33,604,825)		33,604,825		33,604,825
TOTAL INVESTMENTS – 102.2% (Cost $451,568,035)				446,552,128
Liabilities in Excess of Other Assets – (2.2)%				(9,457,706	)
NET ASSETS – 100.0%			$	437,094,422

^(a)  Amount is less than 0.05% of net assets.

^(b)  Step-up bond – Coupon rate increases in increments to maturity. Rate shown as of March 31, 2017. Maturity date shown is the final maturity.

^(c)  Variable Rate Security – Interest rate shown is rate in effect at March 31, 2017.

^(d)  Fair valued as determined in good faith by the Trust’s Oversight Committee in accordance with policy and procedures approved by the Board of Trustees. As of March 31, 2017, total aggregate fair value of the security is $10,250 representing 0.0% of the Fund’s net assets.

^(e)  Securities purchased pursuant to Rule 144A of the Securities Act of 1933. These securities, which represent 0.5% of net assets as of March 31, 2017, are considered liquid and may be resold in transactions exempt from registration, normally to qualified institutional buyers.

^(f)  When-issued security.

^(g)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(h)  The rate shown is the annualized seven-day yield at March 31, 2017.

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Corporate Bonds & Notes
Advertising	$	–	$	151,116	$	–	$	151,116
Aerospace & Defense		–		1,519,684		–		1,519,684
Agriculture		–		1,107,977		–		1,107,977
Airlines		–		197,686		–		197,686
Apparel		–		75,667		–		75,667
Auto Manufacturers		–		2,558,555		–		2,558,555
Auto Parts & Equipment		–		75,874		–		75,874
Banks		–		25,466,658		–		25,466,658
Beverages		–		3,488,988		–		3,488,988
Biotechnology		–		1,898,351		–		1,898,351
Chemicals		–		1,358,137		–		1,358,137
Commercial Services		–		568,310		–		568,310
Construction Materials		–		333,725		–		333,725
Distribution & Wholesale		–		53,985		–		53,985
Diversified Financial Services		–		4,112,802		–		4,112,802
Electric		–		7,328,054		–		7,328,054
Electrical Components & Equipment		–		125,261		–		125,261
Electronics		–		579,855		–		579,855
Engineering & Construction		–		50,519		–		50,519
Environmental Control		–		291,796		–		291,796

See accompanying notes to schedules of investments.

34

State Street Institutional Investment Trust

State Street Aggregate Bond Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Food	$	–	$	1,746,198	$	–	$	1,746,198
Forest Products & Paper		–		430,565		–		430,565
Gas		–		312,614		–		312,614
Hand & Machine Tools		–		52,512		–		52,512
Health Care Products		–		1,948,331		–		1,948,331
Health Care Services		–		1,605,384		–		1,605,384
Holding Companies-Divers		–		24,951		–		24,951
Home Builders		–		25,820		–		25,820
Home Furnishings		–		24,905		–		24,905
Household Products		–		272,905		–		272,905
Household Products & Wares		–		49,260		–		49,260
Housewares		–		390,228		–		390,228
Insurance		–		3,015,053		–		3,015,053
Internet		–		854,343		–		854,343
Iron/Steel		–		507,488		–		507,488
IT Services		–		3,274,319		–		3,274,319
Lodging		–		288,065		–		288,065
Machinery, Construction & Mining		–		414,720		–		414,720
Machinery-Diversified		–		631,535		–		631,535
Media		–		3,782,453		–		3,782,453
Metal Fabricate & Hardware		–		73,948		–		73,948
Mining		–		899,240		–		899,240
Miscellaneous Manufacturer		–		791,424		–		791,424
Multi-National		–		4,245,523		–		4,245,523
Office & Business Equipment		–		50,767		–		50,767
Oil & Gas		–		7,259,963		–		7,259,963
Oil & Gas Services		–		307,509		–		307,509
Packaging & Containers		–		48,198		–		48,198
Pharmaceuticals		–		5,538,409		–		5,538,409
Pipelines		–		3,977,501		–		3,977,501
Real Estate		–		262,348		–		262,348
Real Estate Investment Trusts		–		2,619,206		–		2,619,206
Retail		–		3,681,799		–		3,681,799
Semiconductors		–		1,202,489		–		1,202,489
Software		–		3,187,106		–		3,187,106
Telecommunications		–		5,838,947		–		5,838,947
Toys/Games/Hobbies		–		25,062		–		25,062
Transportation		–		1,870,423		–		1,870,423
Trucking & Leasing		–		100,148		–		100,148
Water		–		51,565		–		51,565
Foreign Government Obligations		–		11,380,294		–		11,380,294
U.S. Government Agency Obligations		–		129,726,451		–		129,726,451
U.S. Treasury Obligations		–		151,113,369		–		151,113,369
Municipal Bonds & Notes		–		2,069,402		–		2,069,402
Asset-Backed Securities
Automobile		–		737,336		–		737,336
Credit Card		–		798,310		–		798,310
Mortgage-Backed Securities		–		4,095,917		–		4,095,917
Short-Term Investment		33,604,825		–		–		33,604,825
Total Investments	$	33,604,825	$	412,947,303	$	–	$	446,552,128

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income
State Street Institutional U.S. Government Money Market Fund, Premier Class		11,977,648	$	11,977,648		126,998,647		105,371,470		33,604,825	$	33,604,825	$	43,988
TOTAL			$	11,977,648							$	33,604,825	$	43,988

See accompanying notes to schedules of investments.

35

State Street Global Equity ex-U.S. Index Fund is a feeder fund that invests substantially all of its investable assets in a master fund, the State Street Global Equity ex-U.S. Index Portfolio. The portfolio of investments for the State Street Global Equity ex-U.S. Index Portfolio follows.

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – 97.0%
Australia – 5.3%
AGL Energy, Ltd.		34,519	$	694,396
Alumina, Ltd.		93,832		128,128
Amcor, Ltd.		58,645		673,744
AMP, Ltd.		151,131		597,204
APA Group		59,303		405,344
Aristocrat Leisure, Ltd.		29,238		400,807
ASX, Ltd.		10,308		396,947
Aurizon Holdings, Ltd.		108,279		433,653
AusNet Services		78,881		101,394
Australia & New Zealand Banking Group, Ltd.		140,493		3,410,310
Bank of Queensland, Ltd.		13,776		127,790
Bendigo & Adelaide Bank, Ltd.		27,057		250,575
BHP Billiton PLC		102,621		1,583,499
BHP Billiton, Ltd.		154,364		2,830,867
Boral, Ltd.		66,049		294,251
Brambles, Ltd.		79,700		568,472
Caltex Australia, Ltd.		14,220		319,899
Challenger, Ltd.		32,025		306,600
CIMIC Group, Ltd.		4,078		111,775
Coca-Cola Amatil, Ltd.		18,962		156,513
Cochlear, Ltd.		3,178		327,843
Commonwealth Bank of Australia		82,363		5,397,777
Computershare, Ltd.		26,548		284,745
Crown Resorts, Ltd.		12,305		110,859
CSL, Ltd.		22,178		2,120,393
Dexus Property Group REIT		51,831		386,299
Domino’s Pizza Enterprises, Ltd.		2,115		93,772
DUET Group		138,365		294,489
Flight Centre Travel Group, Ltd.		714		15,730
Fortescue Metals Group, Ltd.		83,174		395,289
Goodman Group REIT		92,782		547,827
GPT Group REIT		96,636		379,652
Harvey Norman Holdings, Ltd.		23,187		80,128
Healthscope, Ltd.		57,955		100,359
Incitec Pivot, Ltd.		89,468		256,622
Insurance Australia Group, Ltd.		124,504		574,616
LendLease Group		30,196		358,885
Macquarie Group, Ltd.		15,158		1,043,008
Medibank Pvt, Ltd.		150,495		323,750
Mirvac Group REIT		202,322		338,007
National Australia Bank, Ltd.		127,683		3,247,414
Newcrest Mining, Ltd.		39,115		664,512
Oil Search, Ltd.		72,783		400,872
Orica, Ltd.		20,923		280,915
Origin Energy, Ltd.		91,697		493,155
Qantas Airways, Ltd.		7,923		23,511
QBE Insurance Group, Ltd.		69,407		682,488
Ramsay Health Care, Ltd.		7,522		401,040
REA Group, Ltd.		2,308		104,460
Santos, Ltd.		100,733		292,008
Scentre Group REIT		264,622		866,009
SEEK, Ltd.		10,814		131,331
Sonic Healthcare, Ltd.		21,366		360,535
South32, Ltd.(a)		10,757		22,430
South32, Ltd.(a)		261,534		550,651
Stockland REIT		128,602		455,203
Suncorp Group, Ltd.		65,087		655,898
Sydney Airport		61,787		319,099
Tabcorp Holdings, Ltd.		51,259		185,739
Tatts Group, Ltd.		82,061		277,319
Telstra Corp., Ltd.		213,716		759,735
TPG Telecom, Ltd.		9,201		48,922
Transurban Group Stapled Security		102,264		910,401
Treasury Wine Estates, Ltd.		40,293		375,920
Vicinity Centres REIT		178,555		385,476
Vocus Group, Ltd.		17,411		57,378
Wesfarmers, Ltd.		54,689		1,880,298
Westfield Corp.		99,610		674,769
Westpac Banking Corp.		160,225		4,285,300
Woodside Petroleum, Ltd.		37,740		923,582
Woolworths, Ltd.		62,919		1,271,940
				49,210,528
Austria – 0.1%
ANDRITZ AG		2,479		124,312
Erste Group Bank AG		14,084		459,815
OMV AG		8,177		322,585
Raiffeisen Bank International AG(b)		5,065		114,602
Voestalpine AG		6,042		238,456
				1,259,770
Belgium – 0.8%
Ageas		10,257		401,954
Anheuser-Busch InBev SA		36,488		4,015,747
Colruyt SA		2,463		121,231
Groupe Bruxelles Lambert SA		4,319		393,110
KBC Group NV		12,528		833,304
Proximus SADP		8,646		272,010
Solvay SA		3,867		473,773
Telenet Group Holding NV(b)		2,039		121,580
UCB SA		6,606		513,728
Umicore SA		5,253		300,020
				7,446,457
Brazil – 1.7%
AES Tiete Energia SA		5,508		23,767
Ambev SA		231,475		1,329,818
Banco Bradesco SA		43,896		443,115
Banco Bradesco SA Preference Shares		136,018		1,387,191
Banco do Brasil SA		45,400		482,892
Banco Santander Brasil SA		15,500		134,986
BB Seguridade Participacoes SA		37,700		346,727
BM&FBovespa SA		97,002		589,352
BR Malls Participacoes SA(b)		37,820		172,605

See accompanying notes to schedules of investments.

36

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Brazil – (continued)
Braskem SA Class A, Preference Shares		2,400	$	24,000
BRF SA		31,600		384,282
CCR SA		50,000		284,256
Centrais Eletricas Brasileiras SA(b)		16,300		87,790
Centrais Eletricas Brasileiras SA Class B, Preference Shares(b)		6,800		47,269
Cia Brasileira de Distribuicao Preference Shares		6,100		115,470
Cia de Saneamento Basico do Estado de Sao Paulo		12,600		129,336
Cia Energetica de Minas Gerais Preference Shares		31,300		101,739
Cia Paranaense de Energia Preference Shares		1,300		13,406
Cia Siderurgica Nacional SA(b)		41,500		119,078
Cielo SA		53,116		473,618
Cosan SA Industria e Comercio		1,500		18,359
CPFL Energia SA		1,969		15,982
Duratex SA		4,428		12,831
EDP – Energias do Brasil SA		4,474		19,658
Embraer SA		22,300		122,143
Engie Brasil Energia SA		2,500		27,851
Equatorial Energia SA		7,000		129,618
Fibria Celulose SA		16,100		146,398
Gerdau SA Preference Shares		34,900		119,706
Hypermarcas SA		13,500		123,309
Itau Unibanco Holding SA Preference Shares		156,869		1,872,576
Itausa – Investimentos Itau SA(b)		3,276		9,802
Itausa – Investimentos Itau SA Preference Shares		199,939		598,252
JBS SA		45,600		146,640
Klabin SA		21,528		102,726
Kroton Educacional SA		75,100		314,124
Localiza Rent a Car SA		10,800		141,746
Lojas Americanas SA		2,055		8,583
Lojas Americanas SA Preference Shares		22,382		115,331
Lojas Renner SA		36,100		316,093
M Dias Branco SA		400		16,101
Multiplan Empreendimentos Imobiliarios SA		5,238		109,381
Natura Cosmeticos SA		1,400		12,792
Odontoprev SA		3,400		12,101
Petroleo Brasileiro SA(b)		148,700		709,556
Petroleo Brasileiro SA Preference Shares(b)		194,400		887,213
Porto Seguro SA		900		8,053
Qualicorp SA		1,794		11,668
Raia Drogasil SA		13,100		242,075
Rumo SA(b)		16,140		43,464
Sul America SA		2,891		15,197
Suzano Papel e Celulose SA Class A, Preference Shares		8,200		34,247
Telefonica Brasil SA Preference Shares		24,185		356,115
Tim Participacoes SA		56,500		179,735
Ultrapar Participacoes SA		19,100		430,855
Vale SA		66,200		621,143
Vale SA Preference Shares		96,900		860,974
WEG SA		21,500		117,829
				15,720,924
Canada – 6.8%
Agnico Eagle Mines, Ltd.		11,500		486,507
Agrium, Inc.		6,600		628,105
Alimentation Couche-Tard, Inc. Class B		20,800		937,025
AltaGas, Ltd.		5,300		122,401
ARC Resources, Ltd.		19,100		272,110
Atco, Ltd. Class I		1,700		65,915
Bank of Montreal		31,100		2,316,322
Bank of Nova Scotia		57,700		3,365,996
Barrick Gold Corp.		57,700		1,092,867
BCE, Inc.		7,979		352,269
BlackBerry, Ltd.(b)		29,400		227,061
Bombardier, Inc. Class B(b)		76,000		116,252
Brookfield Asset Management, Inc. Class A		42,150		1,531,262
CAE, Inc.		15,700		239,211
Cameco Corp.		12,900		142,382
Canadian Imperial Bank of Commerce		19,200		1,650,856
Canadian National Railway Co.		37,300		2,745,374
Canadian Natural Resources, Ltd.		53,400		1,743,363
Canadian Pacific Railway, Ltd.		6,900		1,010,696
Canadian Tire Corp., Ltd. Class A		3,600		426,445
Canadian Utilities, Ltd. Class A		4,200		122,695
CCL Industries, Inc. Class B		1,500		326,330
Cenovus Energy, Inc.		42,200		476,219
CGI Group, Inc. Class A(b)		11,100		530,343
CI Financial Corp.		13,500		267,540
Constellation Software, Inc.		1,000		490,009
Crescent Point Energy Corp.		28,700		309,241
Dollarama, Inc.		5,900		487,563
Eldorado Gold Corp.		24,200		82,563
Element Fleet Management Corp.		12,600		116,302
Emera, Inc.		2,400		84,544
Empire Co., Ltd. Class A		3,600		54,851
Enbridge, Inc.		79,200		3,308,388
Encana Corp.		48,500		566,588
Fairfax Financial Holdings, Ltd.		1,200		544,551
Finning International, Inc.		10,000		186,256
First Capital Realty, Inc.		5,900		88,612
First Quantum Minerals, Ltd.		36,400		385,657
Fortis, Inc.		20,200		667,502
Franco-Nevada Corp.		9,100		594,453
George Weston, Ltd.		2,900		252,305
Gildan Activewear, Inc.		12,000		323,293
Goldcorp, Inc.		43,300		629,865
Great-West Lifeco, Inc.		15,700		433,806
H&R Real Estate Investment Trust REIT		5,600		96,871
Husky Energy, Inc.(b)		11,555		130,050
Hydro One, Ltd.(c)		6,000		109,099
IGM Financial, Inc.		3,800		113,004
Imperial Oil, Ltd.		15,200		461,818

See accompanying notes to schedules of investments.

37

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Canada – (continued)
Industrial Alliance Insurance & Financial Services, Inc.		5,900	$	254,952
Intact Financial Corp.		6,800		482,244
Inter Pipeline, Ltd.		18,900		397,231
Jean Coutu Group PJC, Inc. Class A		1,100		17,263
Keyera Corp.		6,600		193,054
Kinross Gold Corp.(b)		71,700		252,145
Linamar Corp.		2,100		95,249
Loblaw Cos., Ltd.		11,300		611,411
Magna International, Inc.		19,400		834,826
Manulife Financial Corp.		95,700		1,692,770
Methanex Corp.		5,200		242,951
Metro, Inc.		12,600		385,941
National Bank of Canada		17,000		711,791
Onex Corp.		4,500		322,067
Open Text Corp.		13,800		467,709
Pembina Pipeline Corp.		19,900		628,790
Peyto Exploration & Development Corp.		5,100		104,589
Potash Corp. of Saskatchewan, Inc.		42,000		715,510
Power Corp. of Canada		19,500		456,777
Power Financial Corp.		13,400		353,375
PrairieSky Royalty, Ltd.		11,494		241,834
Restaurant Brands International, Inc.		11,346		630,234
RioCan Real Estate Investment Trust		5,300		104,120
Rogers Communications, Inc. Class B		18,200		802,429
Royal Bank of Canada		71,300		5,179,963
Saputo, Inc.		13,300		457,644
Seven Generations Energy, Ltd. Class A(b)		13,200		240,513
Shaw Communications, Inc. Class B		21,700		448,595
Silver Wheaton Corp.		22,900		475,806
Smart Real Estate Investment Trust REIT		900		22,047
SNC-Lavalin Group, Inc.		8,100		316,918
Sun Life Financial, Inc.		30,100		1,095,982
Suncor Energy, Inc.		80,064		2,451,178
Teck Resources, Ltd. Class B		28,900		630,159
TELUS Corp.		10,500		339,883
Thomson Reuters Corp.		16,800		724,454
Toronto-Dominion Bank		89,100		4,450,156
Tourmaline Oil Corp.(b)		11,600		257,894
TransCanada Corp.		41,400		1,905,086
Turquoise Hill Resources, Ltd.(b)		33,700		102,592
Valeant Pharmaceuticals International, Inc.(b)		18,300		201,572
Veresen, Inc.		19,000		209,425
Vermilion Energy, Inc.		6,500		243,059
West Fraser Timber Co., Ltd.		2,700		112,604
Yamana Gold, Inc.		29,700		81,730
				62,659,259
Chile – 0.3%
AES Gener SA		22,037		8,875
Aguas Andinas SA Class A		22,213		12,907
Antofagasta PLC		15,423		160,939
Banco de Chile		935,556		112,489
Banco de Credito e Inversiones		1,591		87,241
Banco Santander Chile		2,264,400		141,485
Cencosud SA		81,884		250,783
Cia Cervecerias Unidas SA		7,183		90,245
Colbun SA		127,526		28,238
Embotelladora Andina SA Class B, Preference Shares		3,273		12,708
Empresa Nacional de Telecomunicaciones SA(b)		7,195		86,676
Empresas CMPC SA		48,835		118,764
Empresas COPEC SA		24,157		261,679
Enel Americas SA		1,619,545		335,305
Enel Chile SA		898,435		99,111
Enel Generacion Chile SA		115,936		86,942
Itau CorpBanca		3,102,407		27,950
Latam Airlines Group SA(b)		11,268		142,223
SACI Falabella		21,271		178,298
Sociedad Quimica y Minera de Chile SA Class B, Preference Shares		3,726		127,407
				2,370,265
China – 5.8%
3SBio, Inc.(b)(c)		24,500		30,264
58.com, Inc. ADR(b)		2,600		92,014
AAC Technologies Holdings, Inc.		39,500		462,269
Agricultural Bank of China, Ltd. Class H		1,265,000		582,732
Air China, Ltd. Class H		22,000		17,806
Alibaba Group Holding, Ltd. ADR(b)		53,900		5,812,037
Alibaba Health Information Technology, Ltd.(b)		59,500		26,797
Aluminum Corp. of China, Ltd. Class H(b)		188,000		91,926
Anhui Conch Cement Co., Ltd. Class H		42,500		144,374
ANTA Sports Products, Ltd.		38,000		105,128
AviChina Industry & Technology Co., Ltd. Class H		20,000		13,871
Baidu, Inc. ADR(b)		13,100		2,260,012
Bank of China, Ltd. Class H		3,856,000		1,915,224
Bank of Communications Co., Ltd. Class H		472,000		366,838
Beijing Capital International Airport Co., Ltd. Class H		14,000		16,754
Beijing Enterprises Holdings, Ltd.		14,000		72,419
Beijing Enterprises Water Group, Ltd.		164,000		121,552
Belle International Holdings, Ltd.		213,000		138,410
Brilliance China Automotive Holdings, Ltd.		170,000		284,372
Byd Co., Ltd. Class H		21,000		116,464
CGN Power Co., Ltd. Class H(c)		401,600		124,022
China Cinda Asset Management Co., Ltd. Class H		317,592		123,416

See accompanying notes to schedules of investments.

38

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
China – (continued)
China CITIC Bank Corp., Ltd. Class H		486,000	$	322,061
China Coal Energy Co., Ltd. Class H(b)		30,000		15,132
China Communications Construction Co., Ltd. Class H		246,000		346,929
China Communications Services Corp., Ltd. Class H		28,000		18,339
China Conch Venture Holdings, Ltd.		50,500		99,161
China Construction Bank Corp. Class H		4,041,000		3,249,855
China Everbright Bank Co., Ltd. Class H		42,300		20,683
China Everbright International, Ltd.		92,000		123,827
China Everbright, Ltd.		12,000		24,212
China Evergrande Group		170,000		157,499
China Galaxy Securities Co., Ltd. Class H		114,300		105,453
China Huarong Asset Management Co., Ltd.(b)(c)		231,000		94,522
China Huishan Dairy Holdings Co., Ltd.(d)		66,000		3,567
China Jinmao Holdings Group, Ltd.		44,000		14,098
China Life Insurance Co., Ltd. Class H		368,000		1,129,357
China Longyuan Power Group Corp., Ltd. Class H		127,000		98,704
China Medical System Holdings, Ltd.		55,000		97,523
China Mengniu Dairy Co., Ltd.		152,000		314,894
China Merchants Bank Co., Ltd. Class H		202,500		535,466
China Merchants Port Holdings Co., Ltd.		44,478		130,203
China Minsheng Banking Corp., Ltd. Class H		317,500		339,092
China Mobile, Ltd.		295,000		3,228,431
China National Building Material Co., Ltd. Class H		176,000		113,234
China Oilfield Services, Ltd. Class H		86,000		82,553
China Overseas Land & Investment, Ltd.		198,000		565,605
China Pacific Insurance Group Co., Ltd. Class H		136,800		493,758
China Petroleum & Chemical Corp. Class H		1,266,000		1,026,288
China Power International Development, Ltd.		40,000		14,875
China Railway Construction Corp., Ltd. Class H		78,500		111,313
China Railway Group, Ltd. Class H		239,000		213,736
China Resources Beer Holdings Co., Ltd.(b)		64,721		147,239
China Resources Gas Group, Ltd.		34,000		120,311
China Resources Land, Ltd.		149,333		403,525
China Resources Power Holdings Co., Ltd.		68,055		122,773
China Shenhua Energy Co., Ltd. Class H		182,500		423,638
China Southern Airlines Co., Ltd. Class H		16,000		11,076
China State Construction International Holdings, Ltd.		70,000		125,201
China Taiping Insurance Holdings Co., Ltd.(b)		96,400		233,449
China Telecom Corp., Ltd. Class H		746,000		363,809
China Unicom Hong Kong, Ltd.		320,000		428,231
China Vanke Co., Ltd. Class H		47,400		128,083
Chongqing Changan Automobile Co., Ltd. Class B		10,700		14,870
Chongqing Rural Commercial Bank Co., Ltd. Class H		32,000		21,618
CITIC Securities Co., Ltd. Class H		123,000		253,233
CITIC, Ltd.		236,000		336,470
CNOOC, Ltd.		879,000		1,049,620
COSCO SHIPPING Ports, Ltd.		29,008		32,026
Country Garden Holdings Co., Ltd.		213,000		191,581
CRRC Corp., Ltd. Class H		143,350		139,264
CSPC Pharmaceutical Group, Ltd.		240,000		314,380
Ctrip.com International, Ltd. ADR(b)		18,700		919,105
Dongfeng Motor Group Co., Ltd. Class H		74,000		83,127
ENN Energy Holdings, Ltd.		26,000		146,368
Far East Horizon, Ltd.		121,000		113,659
Fosun International, Ltd.		94,000		141,275
Fuyao Glass Industry Group Co., Ltd. Class H(c)		23,600		81,840
Geely Automobile Holdings, Ltd.		295,000		451,715
GF Securities Co., Ltd. Class H		36,800		77,090
GOME Electrical Appliances Holding, Ltd.		142,000		19,368
Great Wall Motor Co., Ltd. Class H		109,500		124,696
Guangdong Investment, Ltd.		92,000		131,166
Guangzhou Automobile Group Co., Ltd. Class H		76,000		121,655
Guangzhou R&F Properties Co., Ltd. Class H		12,400		19,370
Haitian International Holdings, Ltd.		5,000		11,632
Haitong Securities Co., Ltd. Class H		169,200		286,082
Hengan International Group Co., Ltd.		40,000		297,497
HengTen Networks Group, Ltd.(b)		1,204,000		22,154
Huaneng Power International, Inc. Class H		166,000		110,859
Huaneng Renewables Corp., Ltd. Class H		32,629		11,294

See accompanying notes to schedules of investments.

39

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
China – (continued)
Huatai Securities Co., Ltd. Class H(c)		52,800	$	102,726
Industrial & Commercial Bank of China, Ltd. Class H		3,564,000		2,329,682
JD.com, Inc. ADR(b)		33,300		1,035,963
Jiangsu Expressway Co., Ltd. Class H		14,000		20,104
Jiangxi Copper Co., Ltd. Class H		75,000		116,773
Kingsoft Corp., Ltd.		10,000		27,537
Kunlun Energy Co., Ltd.		130,000		120,440
Lenovo Group, Ltd.		384,000		252,986
Longfor Properties Co., Ltd.		66,500		109,357
NetEase, Inc. ADR		3,900		1,107,600
New China Life Insurance Co., Ltd. Class H		28,400		135,212
New Oriental Education & Technology Group, Inc. ADR(b)		7,200		434,736
People’s Insurance Co. Group of China, Ltd. Class H		252,000		104,412
PetroChina Co., Ltd. Class H		1,056,000		773,164
PICC Property & Casualty Co., Ltd. Class H		243,800		375,825
Ping An Insurance Group Co. of China, Ltd. Class H		255,000		1,427,331
Semiconductor Manufacturing International Corp.(b)		157,300		194,715
Shandong Weigao Group Medical Polymer Co., Ltd. Class H		24,000		17,170
Shanghai Electric Group Co., Ltd. Class H(b)		24,000		11,890
Shanghai Fosun Pharmaceutical Group Co., Ltd. Class H		3,500		12,880
Shanghai Industrial Holdings, Ltd.		7,000		20,582
Shanghai Lujiazui Finance & Trade Zone Development Co., Ltd. Class B		46,620		73,566
Shanghai Pharmaceuticals Holding Co., Ltd. Class H		8,700		22,781
Shenzhou International Group Holdings, Ltd.		33,000		208,280
SINA Corp.(b)		3,100		223,572
Sino-Ocean Group Holding, Ltd.		42,000		19,726
Sinopec Engineering Group Co., Ltd. Class H		15,000		15,402
Sinopec Shanghai Petrochemical Co., Ltd. Class H		210,000		116,464
Sinopharm Group Co., Ltd. Class H		66,400		308,013
Sinotrans, Ltd. Class H		16,000		7,474
SOHO China, Ltd.		46,000		24,623
Sunac China Holdings, Ltd.		92,000		119,328
Sunny Optical Technology Group Co., Ltd.		37,000		270,424
TAL Education Group ADR(b)		1,700		181,169
Tencent Holdings, Ltd.		271,200		7,774,993
Tingyi Cayman Islands Holding Corp.		82,000		102,981
TravelSky Technology, Ltd. Class H		42,000		99,224
Tsingtao Brewery Co., Ltd. Class H		6,000		27,640
Vipshop Holdings, Ltd. ADR(b)		22,900		305,486
Want Want China Holdings, Ltd.		190,000		131,532
Weibo Corp. ADR(b)		1,600		83,488
Weichai Power Co., Ltd. Class H		14,000		24,716
Yangzijiang Shipbuilding Holdings, Ltd.		21,000		16,983
Yanzhou Coal Mining Co., Ltd. Class H		14,000		10,881
Yum China Holdings, Inc.(b)		20,900		568,480
YY, Inc. ADR(b)		300		13,833
Zhejiang Expressway Co., Ltd. Class H		18,000		23,532
Zhuzhou CRRC Times Electric Co., Ltd. Class H		15,000		79,714
Zijin Mining Group Co., Ltd. Class H		346,000		128,222
ZTE Corp. Class H		9,400		17,248
				53,770,280
Colombia – 0.1%
Bancolombia SA ADR		500		19,935
Bancolombia SA Preference Shares		12,910		128,035
Cementos Argos SA		9,003		36,710
Corp. Financiera Colombiana SA		1,504		14,635
Ecopetrol SA(b)		307,726		143,555
Ecopetrol SA ADR(b)		700		6,524
Grupo Argos SA		6,676		46,693
Grupo Aval Acciones y Valores SA Preference Shares		28,874		11,674
Grupo de Inversiones Suramericana SA		14,284		192,897
Grupo de Inversiones Suramericana SA Preference Shares		813		10,732
Interconexion Electrica SA ESP		3,293		13,200
				624,590
Czech Republic – 0.0%(e)
CEZ A/S		4,375		75,496
Komercni banka A/S		2,727		101,455
Moneta Money Bank A/S(b)(c)		21,059		71,513
O2 Czech Republic A/S		227		2,542
				251,006
Denmark – 1.2%
AP Moeller – Maersk A/S Class A		205		331,703
AP Moeller – Maersk A/S Class B		335		557,470
Carlsberg A/S Class B		5,550		514,070
Chr Hansen Holding A/S		5,422		349,054
Coloplast A/S Class B		6,238		488,525
Danske Bank A/S		33,975		1,160,557
DONG Energy A/S(c)		8,254		319,226
DSV A/S		9,947		516,467
Genmab A/S(b)		2,947		569,246

See accompanying notes to schedules of investments.

40

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Denmark – (continued)
ISS A/S		9,119	$	345,860
Novo Nordisk A/S Class B		91,718		3,159,392
Novozymes A/S Class B		12,101		481,064
Pandora A/S		5,600		621,797
TDC A/S		26,400		136,542
Tryg A/S		4,736		86,168
Vestas Wind Systems A/S		11,130		907,657
William Demant Holding A/S(b)		4,909		102,872
				10,647,670
Egypt – 0.0%(e)
Commercial International Bank Egypt SAE		32,871		136,783
Global Telecom Holding SAE(b)		13,479		5,003
Talaat Moustafa Group		8,765		4,463
				146,249
Finland – 0.7%
Elisa Oyj		8,041		285,098
Fortum Oyj		23,831		377,994
Kone Oyj Class B		15,787		694,986
Metso Oyj		4,066		123,419
Neste Oyj		6,846		267,697
Nokia Oyj(a)		272,484		1,465,974
Nokian Renkaat Oyj		3,775		158,030
Orion Oyj Class B		5,784		302,323
Sampo Oyj Class A		20,874		992,604
Stora Enso Oyj Class R		30,181		357,663
UPM-Kymmene Oyj		24,985		588,434
Wartsila Oyj Abp		7,972		427,601
				6,041,823
France – 6.8%
Accor SA		9,152		382,242
Aeroports de Paris		1,016		125,890
Air Liquide SA		18,793		2,152,715
Airbus SE		28,077		2,142,022
Alstom SA(b)		8,766		262,659
Arkema SA		3,643		360,336
Atos SE		4,607		571,334
AXA SA		93,473		2,424,870
BNP Paribas SA		50,819		3,393,285
Bollore SA(a)		30,890		120,062
Bollore SA(a)(b)		145		552
Bouygues SA		10,980		448,079
Bureau Veritas SA		14,679		310,466
Cap Gemini SA		8,243		763,139
Carrefour SA		28,559		675,050
Casino Guichard Perrachon SA		1,928		108,115
Christian Dior SE		2,784		648,527
Cie de Saint-Gobain		24,544		1,263,593
Cie Generale des Etablissements Michelin		9,016		1,097,862
CNP Assurances		6,554		133,748
Credit Agricole SA		56,456		766,858
Danone SA		28,617		1,951,522
Dassault Aviation SA		67		85,411
Dassault Systemes SE		6,638		576,067
Edenred		11,238		266,234
Eiffage SA		1,875		147,237
Electricite de France SA		9,116		76,947
Engie SA		72,468		1,029,308
Essilor International SA		10,191		1,241,485
Eurazeo SA		1,647		108,740
Eutelsat Communications SA		10,404		232,901
Fonciere Des Regions		930		77,893
Gecina SA REIT		2,251		306,241
Groupe Eurotunnel SE		26,483		267,160
Hermes International		1,352		642,182
ICADE		845		62,071
Iliad SA		1,468		329,171
Imerys SA		1,427		121,443
Ingenico Group SA		3,145		297,556
JCDecaux SA		3,050		107,618
Kering		3,777		979,423
Klepierre REIT		11,501		448,490
L’Oreal SA		12,166		2,344,137
Lagardere SCA		7,117		210,167
Legrand SA		13,382		808,955
LVMH Moet Hennessy Louis Vuitton SE		13,451		2,961,463
Natixis SA		33,885		209,332
Orange SA		97,202		1,514,212
Pernod Ricard SA		10,442		1,238,557
Peugeot SA(b)		25,439		513,556
Publicis Groupe SA		9,691		679,011
Remy Cointreau SA		312		30,624
Renault SA		9,568		833,310
Rexel SA		16,777		305,404
Safran SA		15,395		1,153,094
Sanofi		55,742		5,044,946
Schneider Electric SE		27,231		1,998,842
SCOR SE		8,909		337,599
SEB SA		665		93,103
SFR Group SA(b)		2,557		80,650
Societe BIC SA		954		119,177
Societe Generale SA		37,167		1,890,205
Sodexo SA		4,733		558,105
Suez Environment Co.		18,301		289,791
Thales SA		5,454		528,849
TOTAL SA		108,032		5,478,594
Unibail-Rodamco SE		4,882		1,144,040
Valeo SA		12,022		802,733
Veolia Environnement SA		25,148		472,312
Vinci SA		24,592		1,954,266
Vivendi SA		50,936		992,872
Wendel SA		1,683		213,846
Zodiac Aerospace		11,499		288,406
				62,596,662
Germany – 6.5%
adidas AG		9,190		1,752,539
Allianz SE		21,895		4,066,499
Axel Springer SE		1,892		104,761
BASF SE		43,957		4,368,559
Bayer AG		39,560		4,571,745
Bayerische Motoren Werke AG		16,124		1,474,656
Bayerische Motoren Werke AG Preference Shares		3,130		247,127

See accompanying notes to schedules of investments.

41

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Germany – (continued)
Beiersdorf AG		5,268	$	499,939
Brenntag AG		8,071		453,629
Commerzbank AG		55,500		503,254
Continental AG		5,423		1,191,934
Covestro AG(c)		4,964		383,115
Daimler AG		46,160		3,416,432
Deutsche Bank AG(b)		67,508		1,166,081
Deutsche Boerse AG(b)		9,651		886,782
Deutsche Lufthansa AG		8,592		139,681
Deutsche Post AG		47,224		1,621,573
Deutsche Telekom AG		157,474		2,766,401
Deutsche Wohnen AG		17,311		571,465
E.ON SE		100,726		802,707
Evonik Industries AG		9,133		298,565
Fraport AG Frankfurt Airport Services Worldwide		1,650		117,056
Fresenius Medical Care AG & Co. KGaA		10,662		901,450
Fresenius SE & Co. KGaA		19,942		1,606,710
Fuchs Petrolub SE Preference Shares		4,276		209,141
GEA Group AG		9,689		412,857
Hannover Rueck SE		3,232		373,851
HeidelbergCement AG		7,507		704,635
Henkel AG & Co. KGaA		5,330		593,728
Henkel AG & Co. KGaA Preference Shares		8,790		1,129,101
HOCHTIEF AG		802		132,913
HUGO BOSS AG		2,234		163,457
Infineon Technologies AG		56,067		1,148,057
Innogy SE(b)(c)		4,781		180,942
KS AG		10,797		251,629
Lanxess AG		4,953		333,159
Linde AG		9,053		1,511,459
MAN SE		1,181		122,057
Merck KGaA		6,513		743,966
METRO AG		9,695		310,871
Muenchener Rueckversicherungs-Gesellschaft AG in Muenchen		7,849		1,539,624
OSRAM Licht AG		5,023		315,625
Porsche Automobil Holding SE Preference Shares		7,996		437,355
ProSiebenSat.1 Media SE		12,094		536,873
QIAGEN NV(b)		11,555		336,279
RWE AG(b)		26,530		440,808
SAP SE		47,036		4,627,269
Schaeffler AG, Preference Shares		6,635		116,950
Siemens AG		36,759		5,048,120
Symrise AG		6,532		435,526
Telefonica Deutschland Holding AG		44,734		222,480
ThyssenKrupp AG		19,176		470,902
TUI AG		26,523		366,813
United Internet AG		6,893		305,807
Volkswagen AG Preference Shares		9,077		1,326,154
Volkswagen AG		1,817		271,392
Vonovia SE		23,363		825,350
Zalando SE(b)(c)		5,202		211,007
				60,068,817
Greece – 0.0%(d)
Alpha Bank AE(b)		56,803		102,066
Eurobank Ergasias SA(b)		24,580		15,117
FF Group(b)		122		2,342
Hellenic Telecommunications Organization SA		10,111		95,165
JUMBO SA		4,872		77,016
National Bank of Greece SA(b)		82,540		21,276
OPAP SA		10,008		93,553
Piraeus Bank SA(b)		86,012		15,639
Titan Cement Co. SA		393		10,046
				432,220
Hong Kong – 2.5%
AIA Group, Ltd.		578,200		3,645,602
Alibaba Pictures Group, Ltd.(b)		460,000		83,459
ASM Pacific Technology, Ltd.		10,100		137,370
Bank of East Asia, Ltd.		68,396		282,948
BOC Hong Kong Holdings, Ltd.		186,500		761,935
Cathay Pacific Airways, Ltd.		17,000		24,675
Cheung Kong Infrastructure Holdings, Ltd.		37,000		290,420
Cheung Kong Property Holdings, Ltd.		134,024		902,806
China Gas Holdings, Ltd.		64,000		103,105
CK Hutchison Holdings, Ltd.		131,524		1,617,924
CLP Holdings, Ltd.		82,000		857,299
First Pacific Co., Ltd.		30,000		21,772
Fullshare Holdings, Ltd.		270,000		119,514
Galaxy Entertainment Group, Ltd.		120,000		657,016
GCL-Poly Energy Holdings, Ltd.(b)		139,000		18,422
Haier Electronics Group Co., Ltd.		56,000		128,264
Hanergy Thin Film Power Group, Ltd.(b)(f)		68,000		–
Hang Lung Group, Ltd.		26,000		110,905
Hang Lung Properties, Ltd.		126,000		327,504
Hang Seng Bank, Ltd.		38,400		778,722
Henderson Land Development Co., Ltd.		59,097		366,148
HK Electric Investments & HK Electric Investments, Ltd.(c)		104,164		96,102
HKT Trust & HKT, Ltd.		215,000		278,312
Hong Kong & China Gas Co., Ltd.		385,000		769,851
Hong Kong Exchanges & Clearing, Ltd.		56,504		1,422,143
Hongkong Land Holdings, Ltd.		62,000		476,780
Hysan Development Co., Ltd.		23,000		104,323
Jardine Matheson Holdings, Ltd.		12,400		796,700
Jardine Strategic Holdings, Ltd.		11,500		483,000
Kerry Properties, Ltd.		30,000		104,034
Li & Fung, Ltd.		208,000		90,196
Link REIT		112,500		788,217
Melco Crown Entertainment, Ltd. ADR		7,038		130,484
MTR Corp., Ltd.		78,488		440,842
New World Development Co., Ltd.		305,229		375,473
Nine Dragons Paper Holdings, Ltd.		80,000		85,955

See accompanying notes to schedules of investments.

42

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Hong Kong – (continued)
NWS Holdings, Ltd.		61,399	$	112,030
PCCW, Ltd.		147,000		86,632
Power Assets Holdings, Ltd.		70,500		607,798
Sands China, Ltd.		124,400		576,259
Shangri-La Asia, Ltd.		20,000		29,132
Shimao Property Holdings, Ltd.		16,500		26,200
Sino Biopharmaceutical, Ltd.		154,000		126,822
Sino Land Co., Ltd.		172,429		302,192
SJM Holdings, Ltd.		96,000		78,070
Sun Art Retail Group, Ltd.		104,000		97,423
Sun Hung Kai Properties, Ltd.		72,000		1,058,020
Swire Pacific, Ltd. Class A		30,000		299,556
Swire Properties, Ltd.		40,200		128,801
Techtronic Industries Co., Ltd.		76,500		309,583
WH Group, Ltd.(c)		433,000		373,300
Wharf Holdings, Ltd.		70,000		600,785
Wheelock & Co., Ltd.		46,000		363,726
Yue Yuen Industrial Holdings, Ltd.		26,000		102,207
				22,956,758
Hungary – 0.1%
MOL Hungarian Oil & Gas PLC		2,275		156,006
OTP Bank PLC		12,692		355,742
Richter Gedeon Nyrt		5,326		121,189
				632,937
India – 1.9%
ACC, Ltd.		889		19,851
Adani Ports & Special Economic Zone, Ltd.		29,797		156,430
Ambuja Cements, Ltd.		25,405		92,801
Apollo Hospitals Enterprise, Ltd.		978		17,551
Ashok Leyland, Ltd.		16,047		20,944
Asian Paints, Ltd.		16,754		276,073
Aurobindo Pharma, Ltd.		9,217		95,811
Axis Bank, Ltd.		85,444		645,814
Bajaj Auto, Ltd.		2,863		123,717
Bajaj Finance, Ltd.		6,447		116,554
Bajaj Finserv, Ltd.		1,830		114,983
Bharat Forge, Ltd.		1,403		22,578
Bharat Heavy Electricals, Ltd.		7,316		18,365
Bharat Petroleum Corp., Ltd.		18,614		186,169
Bharti Airtel, Ltd.		56,359		302,256
Bharti Infratel, Ltd.		21,353		106,806
Bosch, Ltd.		277		96,753
Cadila Healthcare, Ltd.		4,054		27,626
Cairn India, Ltd.		8,551		40,355
Cipla, Ltd.		12,709		116,453
Coal India, Ltd.		23,660		106,759
Container Corp. Of India, Ltd.		121		2,365
Dabur India, Ltd.		21,388		91,352
Divi’s Laboratories, Ltd.		1,231		11,812
Dr Reddy’s Laboratories, Ltd.		6,332		256,654
Eicher Motors, Ltd.		760		298,101
GAIL India, Ltd.		14,601		84,649
GAIL India, Ltd. GDR		400		18,540
Glenmark Pharmaceuticals, Ltd.		6,301		81,534
Godrej Consumer Products, Ltd.		4,355		112,673
Grasim Industries, Ltd.		12,644		204,493
Havells India, Ltd.		5,479		39,151
HCL Technologies, Ltd.		30,038		405,225
Hero MotoCorp, Ltd.		1,988		98,627
Hindalco Industries, Ltd.		43,845		131,363
Hindustan Petroleum Corp., Ltd.		16,902		136,913
Hindustan Unilever, Ltd.		34,202		480,255
Housing Development Finance Corp., Ltd.		73,568		1,699,252
ICICI Bank, Ltd.		51,918		220,952
ICICI Bank, Ltd. ADR		3,576		30,754
Idea Cellular, Ltd.		76,577		101,537
IDFC Bank, Ltd.		72,488		66,477
Indiabulls Housing Finance, Ltd.		10,241		157,459
Infosys, Ltd.		82,341		1,296,584
Infosys, Ltd. ADR		7,300		115,340
ITC, Ltd.		172,017		743,725
JSW Steel, Ltd.		50,000		144,683
Larsen & Toubro, Ltd.		14,953		361,810
Larsen & Toubro, Ltd. GDR		2,120		51,304
LIC Housing Finance, Ltd.		11,773		111,874
Lupin, Ltd.		12,371		274,625
Mahindra & Mahindra Financial Services, Ltd.		5,284		25,641
Mahindra & Mahindra, Ltd.		18,319		364,490
Mahindra & Mahindra, Ltd. GDR		1,651		32,855
Marico, Ltd.		6,131		27,881
Maruti Suzuki India, Ltd.		5,523		513,303
Motherson Sumi Systems, Ltd.		18,799		107,696
Nestle India, Ltd.		936		96,144
NTPC, Ltd.		56,409		144,074
Oil & Natural Gas Corp., Ltd.		45,841		130,601
Piramal Enterprises, Ltd.		1,191		34,922
Power Finance Corp., Ltd.		1,932		4,344
Reliance Industries, Ltd.		57,218		1,163,657
Reliance Industries, Ltd. GDR(c)		3,442		138,712
Shree Cement, Ltd.		111		29,026
Shriram Transport Finance Co., Ltd.		2,627		43,611
Siemens, Ltd.		956		18,477
State Bank of India		75,001		338,766
State Bank of India GDR		1,020		45,543
Sun Pharmaceutical Industries, Ltd.		50,044		528,685
Tata Consultancy Services, Ltd.		23,591		880,316
Tata Motors, Ltd.		75,319		542,086
Tata Motors, Ltd. ADR		1,078		38,431
Tata Motors, Ltd. Class A		5,319		23,112
Tata Power Co., Ltd.		19,125		26,596
Tata Steel, Ltd.		11,716		86,920
Tata Steel, Ltd. GDR		1,300		9,581
Tech Mahindra, Ltd.		28,497		200,776
Titan Co., Ltd.		6,250		44,140
UltraTech Cement, Ltd.		3,292		201,188
United Spirits, Ltd.(b)		2,709		90,738
UPL, Ltd.		12,995		145,790
Vedanta, Ltd.		34,945		148,369
Vedanta, Ltd. ADR		1,433		24,605
Wipro, Ltd.		16,563		131,412
Wipro, Ltd. ADR		2,938		30,056
Yes Bank, Ltd.		17,201		409,476
Zee Entertainment Enterprises, Ltd.		19,332		159,425
				17,516,177

See accompanying notes to schedules of investments.

43

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Indonesia – 0.5%
Adaro Energy Tbk PT		619,000	$	81,292
AKR Corporindo Tbk PT		22,500		10,553
Astra International Tbk PT		1,028,500		665,702
Bank Central Asia Tbk PT		619,500		769,406
Bank Danamon Indonesia Tbk PT		28,500		10,052
Bank Mandiri Persero Tbk PT		491,500		431,545
Bank Negara Indonesia Persero Tbk PT		266,500		129,495
Bank Rakyat Indonesia Persero Tbk PT		571,500		556,468
Bumi Serpong Damai Tbk PT		103,500		14,641
Charoen Pokphand Indonesia Tbk PT		118,000		28,337
Gudang Garam Tbk PT		20,500		100,804
Hanjaya Mandala Sampoerna Tbk PT		358,500		104,923
Indocement Tunggal Prakarsa Tbk PT		22,500		28,029
Indofood CBP Sukses Makmur Tbk PT		115,000		70,335
Indofood Sukses Makmur Tbk PT		169,000		101,460
Jasa Marga Persero Tbk PT		13,875		4,811
Kalbe Farma Tbk PT		817,000		94,419
Lippo Karawaci Tbk PT		368,500		20,049
Matahari Department Store Tbk PT		78,500		77,613
Media Nusantara Citra Tbk PT		105,000		14,577
Pakuwon Jati Tbk PT		1,357,000		62,628
Perusahaan Gas Negara Persero Tbk		473,000		89,805
Semen Indonesia Persero Tbk PT		112,000		75,644
Summarecon Agung Tbk PT		87,500		8,799
Surya Citra Media Tbk PT		50,000		10,131
Telekomunikasi Indonesia Persero Tbk PT		2,529,000		783,818
Tower Bersama Infrastructure Tbk PT		16,500		6,748
Unilever Indonesia Tbk PT		86,500		281,236
United Tractors Tbk PT		64,500		128,269
Waskita Karya Persero Tbk PT		124,000		22,054
XL Axiata Tbk PT(b)		78,125		17,940
				4,801,583
Ireland – 0.5%
Bank of Ireland(b)		1,455,128		365,738
CRH PLC		40,531		1,433,582
Experian PLC		47,522		967,421
James Hardie Industries PLC		23,705		371,974
Kerry Group PLC Class A		8,079		636,834
Paddy Power Betfair PLC		4,156		446,727
Ryanair Holdings PLC ADR(b)		1,263		104,804
				4,327,080
Israel – 0.5%
Azrieli Group, Ltd.		2,906		153,845
Bank Hapoalim BM		57,587		350,233
Bank Leumi Le-Israel BM(b)		78,981		348,078
Bezeq The Israeli Telecommunication Corp., Ltd.		67,709		121,412
Check Point Software Technologies, Ltd.(b)		6,020		618,013
Elbit Systems, Ltd.		1,528		174,496
Frutarom Industries, Ltd.		2,616		145,914
Israel Chemicals, Ltd.		7,839		33,252
Mizrahi Tefahot Bank, Ltd.		9,263		156,760
Mobileye NV(b)		9,147		561,626
Nice, Ltd.		2,008		134,622
Taro Pharmaceutical Industries, Ltd.(b)		281		32,770
Teva Pharmaceutical Industries, Ltd.		26,075		855,401
Teva Pharmaceutical Industries, Ltd. ADR		16,553		531,186
				4,217,608
Italy – 1.3%
Assicurazioni Generali SpA		58,151		926,711
Atlantia SpA		21,329		552,061
Enel SpA		370,696		1,750,053
Eni SpA		123,032		2,019,889
Ferrari NV		6,517		486,175
Intesa Sanpaolo SpA(a)		616,624		1,679,112
Intesa Sanpaolo SpA(a)		40,245		102,617
Leonardo SpA(b)		22,104		314,193
Luxottica Group SpA		8,819		488,125
Mediobanca SpA		31,711		286,594
Poste Italiane SpA(c)		17,493		116,935
Prysmian SpA		10,858		287,774
Saipem SpA(b)		236,317		107,546
Snam SpA		126,215		547,262
Telecom Italia RSP/Milano		202,573		148,197
Telecom Italia SpA/Milano(b)		526,054		474,306
Terna Rete Elettrica Nazionale SpA		80,600		400,857
UniCredit SpA		94,645		1,462,738
UnipolSai Assicurazioni SpA		47,138		104,261
				12,255,406
Japan – 16.0%
ABC-Mart, Inc.		1,500		87,633
Acom Co., Ltd.(b)		18,400		73,481
Aeon Co., Ltd.		33,900		494,369
AEON Financial Service Co., Ltd.		4,900		92,213
Aeon Mall Co., Ltd.		1,400		22,012
Air Water, Inc.		5,800		106,808
Aisin Seiki Co., Ltd.		10,000		490,891
Ajinomoto Co., Inc.		27,800		547,992
Alfresa Holdings Corp.		6,200		107,330
Alps Electric Co., Ltd.		9,900		280,306
Amada Holdings Co., Ltd.		11,600		132,313
ANA Holdings, Inc.		40,000		121,978
Aozora Bank, Ltd.		39,000		143,498
Asahi Glass Co., Ltd.		54,000		437,117
Asahi Group Holdings, Ltd.		19,600		740,167
Asahi Kasei Corp.		64,000		620,300
Asics Corp.		5,800		93,067
Astellas Pharma, Inc.		105,000		1,381,405
Bandai Namco Holdings, Inc.		11,000		328,727
Bank of Kyoto, Ltd.		6,000		43,669

See accompanying notes to schedules of investments.

44

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Japan – (continued)
Benesse Holdings, Inc.		3,000	$	93,691
Bridgestone Corp.		31,900		1,289,112
Brother Industries, Ltd.		13,500		281,679
Calbee, Inc.		3,100		105,577
Canon, Inc.		52,000		1,619,779
Casio Computer Co., Ltd.		8,700		120,940
Central Japan Railway Co.		7,100		1,155,829
Chiba Bank, Ltd.		40,000		256,663
Chubu Electric Power Co., Inc.		33,400		446,912
Chugai Pharmaceutical Co., Ltd.		12,000		411,918
Chugoku Bank, Ltd.		6,900		100,314
Chugoku Electric Power Co., Inc.		9,500		105,035
Coca-Cola West Co., Ltd.		5,000		161,088
Concordia Financial Group, Ltd.		63,800		295,096
Credit Saison Co., Ltd.		5,900		105,155
CYBERDYNE, Inc.(b)		5,300		76,006
Dai Nippon Printing Co., Ltd.		29,000		312,304
Dai-ichi Life Holdings, Inc.		53,500		958,564
Daicel Corp.		16,900		203,382
Daiichi Sankyo Co., Ltd.		30,500		686,202
Daikin Industries, Ltd.		11,500		1,154,335
Daito Trust Construction Co., Ltd.		3,600		494,140
Daiwa House Industry Co., Ltd.		28,300		811,692
Daiwa House REIT Investment Corp.		39		101,289
Daiwa Securities Group, Inc.		85,000		517,109
DeNA Co., Ltd.		3,100		62,846
Denso Corp.		23,500		1,032,752
Dentsu, Inc.		11,100		601,669
Don Quijote Holdings Co., Ltd.		3,900		135,098
East Japan Railway Co.		16,200		1,409,340
Eisai Co., Ltd.		12,700		656,940
Electric Power Development Co., Ltd.		5,500		128,578
FamilyMart UNY Holdings Co., Ltd.		4,500		268,150
FANUC Corp.		9,400		1,925,047
Fast Retailing Co., Ltd.		2,600		814,790
Fuji Electric Co., Ltd.		22,000		130,503
Fuji Heavy Industries, Ltd.		30,100		1,102,919
FUJIFILM Holdings Corp.		21,800		850,636
Fujitsu, Ltd.		96,000		586,614
Fukuoka Financial Group, Inc.		28,000		121,116
Hachijuni Bank, Ltd.		16,800		94,833
Hakuhodo DY Holdings, Inc.		8,400		99,506
Hamamatsu Photonics KK		4,700		135,184
Hankyu Hanshin Holdings, Inc.		12,700		412,582
Hikari Tsushin, Inc.		1,000		97,640
Hino Motors, Ltd.		10,000		120,883
Hirose Electric Co., Ltd.		1,100		152,024
Hiroshima Bank, Ltd.		21,000		89,141
Hisamitsu Pharmaceutical Co., Inc.		2,100		119,860
Hitachi Chemical Co., Ltd.		4,200		116,091
Hitachi Construction Machinery Co., Ltd.		4,400		109,576
Hitachi High-Technologies Corp.		2,600		105,815
Hitachi Metals, Ltd.		8,400		117,749
Hitachi, Ltd.		236,000		1,276,048
Hokuriku Electric Power Co.		7,500		72,691
Honda Motor Co., Ltd.		78,600		2,363,714
Hoshizaki Corp.		1,600		125,783
Hoya Corp.		19,800		951,708
Hulic Co., Ltd.		10,400		97,719
Idemitsu Kosan Co., Ltd.		3,700		128,502
IHI Corp.(b)		48,000		151,198
Iida Group Holdings Co., Ltd.		5,700		87,370
Inpex Corp.		49,100		482,275
Isetan Mitsukoshi Holdings, Ltd.		19,600		214,944
Isuzu Motors, Ltd.		31,300		413,616
ITOCHU Corp.		74,000		1,049,269
J Front Retailing Co., Ltd.		8,800		130,306
Japan Airlines Co., Ltd.		4,400		139,230
Japan Airport Terminal Co., Ltd.		2,000		69,371
Japan Exchange Group, Inc.		27,600		392,587
Japan Post Bank Co., Ltd.		22,600		280,092
Japan Post Holdings Co., Ltd.		24,600		308,411
Japan Prime Realty Investment Corp. REIT		28		108,301
Japan Real Estate Investment Corp. REIT		70		370,636
Japan Retail Fund Investment Corp. REIT		141		276,356
Japan Tobacco, Inc.		53,400		1,733,835
JFE Holdings, Inc.		27,300		467,577
JGC Corp.		12,100		210,118
JSR Corp.		7,400		124,650
JTEKT Corp.		7,900		122,580
JX Holdings, Inc.		110,000		539,684
Kajima Corp.		48,000		312,734
Kakaku.com, Inc.		5,100		69,340
Kamigumi Co., Ltd.		10,000		86,332
Kaneka Corp.		11,000		81,737
Kansai Electric Power Co., Inc.		37,100		455,135
Kansai Paint Co., Ltd.		7,100		150,564
Kao Corp.		24,800		1,358,514
Kawasaki Heavy Industries, Ltd.		47,000		142,565
KDDI Corp.		88,500		2,320,713
Keihan Holdings Co., Ltd.		17,000		103,895
Keikyu Corp.		26,000		285,130
Keio Corp.		32,000		253,289
Keisei Electric Railway Co., Ltd.		4,500		104,312
Keyence Corp.		4,800		1,920,345
Kikkoman Corp.		5,000		149,197
Kintetsu Group Holdings Co., Ltd.		97,000		349,071
Kirin Holdings Co., Ltd.		41,500		782,292
Kobe Steel, Ltd.(b)		11,500		104,855
Koito Manufacturing Co., Ltd.		6,100		316,961
Komatsu, Ltd.		45,500		1,184,764
Konami Holdings Corp.		3,100		131,450
Konica Minolta, Inc.		15,400		137,651
Kose Corp.		1,300		117,482
Kubota Corp.		53,000		794,786
Kuraray Co., Ltd.		19,500		295,396
Kurita Water Industries, Ltd.		4,100		99,087
Kyocera Corp.		16,000		890,532
Kyowa Hakko Kirin Co., Ltd.		15,300		241,933
Kyushu Electric Power Co., Inc.		14,300		152,201

See accompanying notes to schedules of investments.

45

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Japan – (continued)
Kyushu Financial Group, Inc.		14,200	$	86,783
Lawson, Inc.		1,900		128,736
LINE Corp.(b)		2,000		76,730
Lion Corp.		14,000		251,530
LIXIL Group Corp.		14,400		365,072
M3, Inc.		10,800		267,795
Mabuchi Motor Co., Ltd.		1,900		106,910
Makita Corp.		11,800		412,995
Marubeni Corp.		85,400		525,368
Marui Group Co., Ltd.		7,500		101,835
Maruichi Steel Tube, Ltd.		2,600		73,849
Mazda Motor Corp.		29,500		424,379
McDonald’s Holdings Co., Japan, Ltd.		1,000		29,166
Mebuki Financial Group, Inc.		34,800		138,975
Medipal Holdings Corp.		7,000		109,683
MEIJI Holdings Co., Ltd.		6,000		499,147
MINEBEA MITSUMI, Inc.		12,600		167,917
Miraca Holdings, Inc.		2,200		101,086
MISUMI Group, Inc.		15,500		279,871
Mitsubishi Chemical Holdings Corp.		70,400		544,221
Mitsubishi Corp.		73,500		1,586,684
Mitsubishi Electric Corp.		94,500		1,354,361
Mitsubishi Estate Co., Ltd.		61,000		1,111,281
Mitsubishi Gas Chemical Co., Inc.		7,100		147,314
Mitsubishi Heavy Industries, Ltd.		161,000		645,271
Mitsubishi Logistics Corp.		5,000		68,832
Mitsubishi Materials Corp.		4,000		120,973
Mitsubishi Motors Corp.		24,600		147,693
Mitsubishi Tanabe Pharma Corp.		7,400		153,937
Mitsubishi UFJ Financial Group, Inc.		610,600		3,834,127
Mitsubishi UFJ Lease & Finance Co., Ltd.		19,000		94,633
Mitsui & Co., Ltd.		83,800		1,212,667
Mitsui Chemicals, Inc.		31,000		153,011
Mitsui Fudosan Co., Ltd.		44,000		937,414
Mitsui OSK Lines, Ltd.		45,000		141,344
Mixi, Inc.		2,100		101,014
Mizuho Financial Group, Inc.		1,165,000		2,132,819
MS&AD Insurance Group Holdings, Inc.		25,300		803,751
Murata Manufacturing Co., Ltd.		9,400		1,335,807
Nabtesco Corp.		4,200		111,191
Nagoya Railroad Co., Ltd.		52,000		233,797
NEC Corp.		139,000		334,309
Nexon Co., Ltd.		7,200		114,303
NGK Insulators, Ltd.		14,500		327,919
NGK Spark Plug Co., Ltd.		6,300		143,832
NH Foods, Ltd.		10,000		268,240
Nidec Corp.		11,800		1,121,969
Nikon Corp.		18,800		272,307
Nintendo Co., Ltd.		5,600		1,298,358
Nippon Building Fund, Inc. REIT		74		404,433
Nippon Electric Glass Co., Ltd.		17,000		102,674
Nippon Express Co., Ltd.		28,000		143,731
Nippon Paint Holdings Co., Ltd.		9,200		319,932
Nippon Prologis REIT, Inc.		52		112,605
Nippon Steel & Sumitomo Metal Corp.		40,100		923,059
Nippon Telegraph & Telephone Corp.		33,700		1,437,157
Nippon Yusen KK(b)		57,000		120,210
Nissan Chemical Industries, Ltd.		7,000		203,536
Nissan Motor Co., Ltd.		118,400		1,140,648
Nisshin Seifun Group, Inc.		6,900		102,853
Nissin Foods Holdings Co., Ltd.		2,000		110,742
Nitori Holdings Co., Ltd.		4,200		530,324
Nitto Denko Corp.		8,400		648,450
NOK Corp.		4,000		92,758
Nomura Holdings, Inc.		178,900		1,110,840
Nomura Real Estate Holdings, Inc.		5,200		82,786
Nomura Real Estate Master Fund, Inc.		216		334,962
Nomura Research Institute, Ltd.		7,600		279,637
NSK, Ltd.		24,400		348,603
NTT Data Corp.		6,800		322,211
NTT DOCOMO, Inc.		67,400		1,568,110
Obayashi Corp.		35,000		326,977
Obic Co., Ltd.		2,200		104,640
Odakyu Electric Railway Co., Ltd.		16,000		311,011
Oji Holdings Corp.		29,000		135,592
Olympus Corp.		15,000		576,146
Omron Corp.		10,200		447,160
Ono Pharmaceutical Co., Ltd.		21,500		444,645
Oracle Corp. Japan		1,600		91,322
Oriental Land Co., Ltd.		11,100		635,837
ORIX Corp.		65,300		965,465
Osaka Gas Co., Ltd.		99,000		375,814
Otsuka Corp.		2,000		108,409
Otsuka Holdings Co., Ltd.		19,500		878,839
Panasonic Corp.		108,600		1,226,050
Park24 Co., Ltd.		3,500		91,528
Pola Orbis Holdings, Inc.		4,000		96,455
Rakuten, Inc.		48,300		483,303
Recruit Holdings Co., Ltd.		18,500		943,014
Resona Holdings, Inc.		112,400		603,105
Ricoh Co., Ltd.		36,600		300,867
Rinnai Corp.		900		71,561
Rohm Co., Ltd.		4,900		325,406
Ryohin Keikaku Co., Ltd.		800		175,105
Sankyo Co., Ltd.		600		20,031
Santen Pharmaceutical Co., Ltd.		21,100		305,243
SBI Holdings, Inc.		8,500		118,388
Secom Co., Ltd.		10,500		750,915
Sega Sammy Holdings, Inc.		7,300		97,744
Seibu Holdings, Inc.		6,100		100,563
Seiko Epson Corp.		15,100		317,638
Sekisui Chemical Co., Ltd.		21,900		367,719
Sekisui House, Ltd.		31,000		509,387
Seven & i Holdings Co., Ltd.		36,800		1,440,560
Seven Bank, Ltd.		8,100		26,460
Sharp Corp.(b)		88,000		371,175
Shimadzu Corp.		8,000		127,004
Shimamura Co., Ltd.		800		105,609
Shimano, Inc.		3,800		554,160
Shimizu Corp.		31,000		277,645

See accompanying notes to schedules of investments.

46

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Japan – (continued)
Shin-Etsu Chemical Co., Ltd.		18,900	$	1,635,750
Shinsei Bank, Ltd.		66,000		121,422
Shionogi & Co., Ltd.		15,000		773,759
Shiseido Co., Ltd.		19,600		515,373
Shizuoka Bank, Ltd.		18,000		146,352
Showa Shell Sekiyu KK		8,600		86,980
SMC Corp.		2,900		856,753
SoftBank Group Corp.		46,100		3,252,609
Sohgo Security Services Co., Ltd.		1,900		70,847
Sompo Holdings, Inc.		17,900		655,246
Sony Corp.		61,300		2,071,756
Sony Financial Holdings, Inc.		7,000		112,384
Stanley Electric Co., Ltd.		5,200		148,165
Start Today Co., Ltd.		6,700		148,094
Sumitomo Chemical Co., Ltd.		83,000		463,304
Sumitomo Corp.		59,700		802,304
Sumitomo Dainippon Pharma Co., Ltd.		5,700		94,020
Sumitomo Electric Industries, Ltd.		38,500		637,808
Sumitomo Heavy Industries, Ltd.		21,000		146,244
Sumitomo Metal Mining Co., Ltd.		27,000		383,689
Sumitomo Mitsui Financial Group, Inc.		64,700		2,348,663
Sumitomo Mitsui Trust Holdings, Inc.		16,800		581,962
Sumitomo Realty & Development Co., Ltd.		18,000		466,194
Sumitomo Rubber Industries, Ltd.		6,600		112,359
Sundrug Co., Ltd.		2,600		87,149
Suntory Beverage & Food, Ltd.		7,600		319,878
Suruga Bank, Ltd.		5,800		122,007
Suzuken Co., Ltd.		2,900		94,992
Suzuki Motor Corp.		17,400		721,734
Sysmex Corp.		8,100		490,667
T&D Holdings, Inc.		30,400		440,872
Taiheiyo Cement Corp.		41,000		136,875
Taisei Corp.		56,000		407,574
Taisho Pharmaceutical Holdings Co., Ltd.		1,200		97,353
Taiyo Nippon Sanso Corp.		1,600		18,695
Takashimaya Co., Ltd.		12,000		104,891
Takeda Pharmaceutical Co., Ltd.		34,700		1,628,343
TDK Corp.		6,400		404,918
Teijin, Ltd.		6,400		120,556
Terumo Corp.		17,300		600,058
THK Co., Ltd.		4,800		120,743
Tobu Railway Co., Ltd.		54,000		273,320
Toho Co., Ltd.		3,100		82,097
Toho Gas Co., Ltd.		13,000		91,815
Tohoku Electric Power Co., Inc.		24,700		334,269
Tokio Marine Holdings, Inc.		33,300		1,403,364
Tokyo Electric Power Co. Holdings, Inc.(b)		78,400		306,761
Tokyo Electron, Ltd.		7,900		861,747
Tokyo Gas Co., Ltd.		102,000		463,728
Tokyo Tatemono Co., Ltd.		8,100		106,711
Tokyu Corp.		56,000		396,015
Tokyu Fudosan Holdings Corp.		13,900		75,344
TonenGeneral Sekiyu KK(b)		18,000		225,195
Toppan Printing Co., Ltd.		29,000		295,387
Toray Industries, Inc.		75,000		664,318
Toshiba Corp.(b)		208,000		450,608
TOTO, Ltd.		7,700		290,573
Toyo Seikan Group Holdings, Ltd.		5,600		90,862
Toyo Suisan Kaisha, Ltd.		3,000		111,595
Toyoda Gosei Co., Ltd.		800		20,325
Toyota Industries Corp.		8,600		426,797
Toyota Motor Corp.		127,400		6,907,931
Toyota Tsusho Corp.		11,600		350,821
Trend Micro, Inc.		3,800		168,806
Tsuruha Holdings, Inc.		1,200		110,922
Unicharm Corp.		21,000		502,715
United Urban Investment Corp. REIT		167		256,277
USS Co., Ltd.		7,400		123,256
West Japan Railway Co.		8,500		552,351
Yahoo! Japan Corp.		78,200		360,718
Yakult Honsha Co., Ltd.		5,100		282,850
Yamada Denki Co., Ltd.		23,400		116,549
Yamaguchi Financial Group, Inc.		8,000		86,655
Yamaha Corp.		9,300		255,806
Yamaha Motor Co., Ltd.		15,100		363,305
Yamato Holdings Co., Ltd.		18,600		389,343
Yamazaki Baking Co., Ltd.		4,600		94,535
Yaskawa Electric Corp.		8,700		174,422
Yokogawa Electric Corp.		8,200		128,928
Yokohama Rubber Co., Ltd.		4,700		91,908
				147,376,033
Jordan – 0.0%(e)
Hikma Pharmaceuticals PLC		4,596		113,849
Luxembourg – 0.2%
ArcelorMittal(b)		92,719		782,035
Eurofins Scientific SE		616		268,709
Millicom International Cellular SA SDR		2,207		123,522
RTL Group SA(b)		1,049		84,708
SES SA		19,118		445,861
Tenaris SA		24,683		424,243
				2,129,078
Macau – 0.0%(e)
MGM China Holdings, Ltd.		43,200		90,052
Wynn Macau, Ltd.		62,400		127,024
				217,076
Malaysia – 0.4%
AirAsia Bhd		4,600		3,264
Alliance Financial Group Bhd		9,200		8,482
AMMB Holdings Bhd		30,600		32,152
Astro Malaysia Holdings Bhd		13,200		8,173
Axiata Group Bhd		72,419		82,802
Berjaya Sports Toto Bhd		2,500		1,644
British American Tobacco Malaysia Bhd		2,800		28,851
CIMB Group Holdings Bhd		107,678		135,525
Dialog Group Bhd		31,000		12,399
DiGi.Com Bhd		113,800		131,916

See accompanying notes to schedules of investments.

47

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Malaysia – (continued)
Felda Global Ventures Holdings Bhd		4,700	$	2,220
Gamuda Bhd		28,816		33,729
Genting Bhd		128,100		277,591
Genting Malaysia Bhd		102,700		126,475
Genting Plantations Bhd		900		2,375
HAP Seng Consolidated Bhd		9,700		19,705
Hartalega Holdings Bhd		2,400		2,690
Hong Leong Bank Bhd		10,232		31,814
Hong Leong Financial Group Bhd		4,800		17,245
IHH Healthcare Bhd		185,200		251,090
IJM Corp. Bhd		126,600		97,264
IOI Corp. Bhd		149,800		157,399
IOI Properties Group Bhd		38,750		18,125
Kuala Lumpur Kepong Bhd		18,300		102,055
Lafarge Malaysia Bhd		3,500		5,299
Malayan Banking Bhd		189,075		381,098
Malaysia Airports Holdings Bhd		7,024		11,031
Maxis Bhd		73,400		106,812
MISC Bhd		16,700		27,623
Petronas Chemicals Group Bhd		79,100		137,627
Petronas Dagangan Bhd		2,100		11,388
Petronas Gas Bhd		23,000		102,696
PPB Group Bhd		7,800		29,504
Public Bank Bhd		138,200		621,439
RHB Capital Bhd		9,259		10,817
Sapura Energy Bhd(b)		192,900		79,331
Sime Darby Bhd		83,135		174,329
Telekom Malaysia Bhd		14,103		20,459
Tenaga Nasional Bhd		173,900		539,127
UMW Holdings Bhd(b)		4,900		6,643
Westports Holdings Bhd		8,800		8,053
YTL Corp. Bhd		80,400		27,069
YTL Power International Bhd		7,400		2,542
				3,887,872
Mexico – 0.8%
Alfa SAB de CV Class A		89,900		130,548
America Movil SAB de CV Series L		1,637,200		1,155,263
Arca Continental SAB de CV		16,700		115,269
Cemex SAB de CV Series CPO(b)		716,696		645,379
Coca-Cola Femsa SAB de CV Series L		16,400		116,821
El Puerto de Liverpool SAB de CV Series C1		3,000		23,284
Fibra Uno Administracion SA de CV REIT		80,300		136,476
Fomento Economico Mexicano SAB de CV		92,500		816,453
Fresnillo PLC		6,919		134,623
Gentera SAB de CV		17,100		28,073
Gruma SAB de CV Class B		5,900		82,876
Grupo Aeroportuario del Pacifico SAB de CV Class B		11,900		114,880
Grupo Aeroportuario del Sureste SAB de CV Class B		7,800		134,331
Grupo Bimbo SAB de CV Series A		51,900		128,275
Grupo Carso SAB de CV Series A1		23,000		104,766
Grupo Financiero Banorte SAB de CV Series O		127,100		727,070
Grupo Financiero Inbursa SAB de CV Series O		76,700		126,244
Grupo Financiero Santander Mexico SAB de CV Class B		69,000		123,755
Grupo Lala SAB de CV		5,300		9,562
Grupo Mexico SAB de CV Series B		196,000		584,540
Grupo Televisa SAB Series CPO		125,300		645,323
Industrias Penoles SAB de CV		4,675		119,644
Infraestructura Energetica Nova SAB de CV		22,700		107,810
Kimberly-Clark de Mexico SAB de CV Class A		51,400		110,937
Mexichem SAB de CV		43,357		117,381
OHL Mexico SAB de CV		6,700		9,413
Promotora y Operadora de Infraestructura SAB de CV(b)		7,200		77,275
Wal-Mart de Mexico SAB de CV		271,700		623,200
				7,249,471
Netherlands – 3.1%
ABN AMRO Group NV(c)		15,152		368,682
Aegon NV		94,186		480,614
AerCap Holdings NV(b)		8,523		391,802
Akzo Nobel NV		12,388		1,029,890
Altice NV Class A(b)		19,612		444,796
Altice NV Class B(b)		4,735		107,364
ASML Holding NV		17,825		2,371,651
Boskalis Westminster		3,079		106,451
EXOR NV		5,723		296,748
Gemalto NV		4,546		254,681
Heineken Holding NV		5,370		428,292
Heineken NV		11,470		978,965
ING Groep NV		186,550		2,827,262
Koninklijke Ahold Delhaize NV		62,692		1,345,067
Koninklijke DSM NV		9,280		629,371
Koninklijke KPN NV		175,826		530,878
Koninklijke Philips NV		46,318		1,492,622
Koninklijke Vopak NV		2,388		104,398
NN Group NV		16,146		526,444
NXP Semiconductors NV(b)		14,354		1,485,639
Randstad Holding NV		6,368		368,469
Royal Dutch Shell PLC Class A		214,286		5,616,315
Royal Dutch Shell PLC Class B		179,906		4,914,327
Steinhoff International Holdings NV		149,086		713,478
Wolters Kluwer NV		15,454		644,046
				28,458,252
New Zealand – 0.1%
Auckland International Airport, Ltd.		50,835		240,225
Contact Energy, Ltd.		26,423		93,463
Fletcher Building, Ltd.		38,341		222,995
Mercury NZ, Ltd.		5,946		13,093
Meridian Energy, Ltd.		54,880		107,419
Ryman Healthcare, Ltd.		15,168		89,173

See accompanying notes to schedules of investments.

48

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
New Zealand – (continued)
Spark New Zealand, Ltd.		103,936	$	254,297
				1,020,665
Norway – 0.4%
DNB ASA		49,028		776,899
Gjensidige Forsikring ASA		6,911		105,247
Marine Harvest ASA(b)		20,442		311,549
Norsk Hydro ASA		72,423		420,428
Orkla ASA		43,208		386,859
Schibsted ASA Class A		3,525		90,701
Schibsted ASA Class B		3,222		73,714
Statoil ASA		55,411		946,430
Telenor ASA		38,221		635,912
Yara International ASA		9,439		363,322
				4,111,061
Peru – 0.1%
Cia de Minas Buenaventura SAA ADR		12,300		148,092
Credicorp, Ltd.		3,500		571,550
Southern Copper Corp.		3,500		125,615
				845,257
Philippines – 0.2%
Aboitiz Equity Ventures, Inc.		73,760		109,446
Aboitiz Power Corp.		12,500		10,401
Alliance Global Group, Inc.		29,200		7,379
Ayala Corp.		7,980		134,392
Ayala Land, Inc.		410,500		270,394
Bank of the Philippine Islands		6,680		13,473
BDO Unibank, Inc.		64,873		152,049
DMCI Holdings, Inc.		33,730		7,664
Energy Development Corp.		79,600		9,550
Globe Telecom, Inc.		280		11,340
GT Capital Holdings, Inc.		5,280		120,490
International Container Terminal Services, Inc.		4,320		7,740
JG Summit Holdings, Inc.		90,600		146,892
Jollibee Foods Corp.		6,770		26,648
Megaworld Corp.		95,000		6,400
Metro Pacific Investments Corp.		974,000		116,861
Metropolitan Bank & Trust Co.		14,550		23,199
PLDT, Inc.		3,165		103,828
Robinsons Land Corp.		31,800		14,577
Security Bank Corp.		5,920		23,833
SM Investments Corp.		6,525		90,641
SM Prime Holdings, Inc.		462,500		260,862
Universal Robina Corp.		29,180		95,086
				1,763,145
Poland – 0.2%
Alior Bank SA(b)		1,059		19,106
Bank Handlowy w Warszawie SA		120		2,323
Bank Millennium SA(b)		5,244		8,537
Bank Pekao SA		8,784		292,878
Bank Zachodni WBK SA		1,284		110,998
CCC SA		294		17,661
Cyfrowy Polsat SA(b)		1,629		9,950
Eurocash SA		1,382		11,131
Grupa Azoty SA		626		10,918
Grupa Lotos SA(b)		338		4,661
KGHM Polska Miedz SA		5,578		163,034
LPP SA		19		32,585
mBank SA(b)		125		11,784
Orange Polska SA		5,574		6,514
PGE Polska Grupa Energetyczna SA		36,848		106,025
Polski Koncern Naftowy Orlen SA		17,200		434,130
Polskie Gornictwo Naftowe i Gazownictwo SA		74,980		112,036
Powszechna Kasa Oszczednosci Bank Polski SA(b)		47,152		381,553
Powszechny Zaklad Ubezpieczen SA		29,685		260,740
Synthos SA		1,938		2,568
Tauron Polska Energia SA(b)		21,367		18,282
				2,017,414
Portugal – 0.1%
EDP – Energias de Portugal SA		123,426		419,133
Galp Energia SGPS SA		26,538		403,758
Jeronimo Martins SGPS SA		8,311		149,069
				971,960
Qatar – 0.1%
Barwa Real Estate Co.		826		8,110
Commercial Bank QSC		2,492		23,236
Doha Bank QSC		1,603		13,824
Ezdan Holding Group QSC		26,021		112,914
Industries Qatar QSC		4,936		149,526
Masraf Al Rayan QSC		21,475		248,598
Ooredoo QSC		1,309		34,728
Qatar Electricity & Water Co. QSC		234		14,139
Qatar Gas Transport Co., Ltd.		2,813		16,417
Qatar Insurance Co. SAQ		8,467		163,475
Qatar Islamic Bank SAQ		1,177		33,069
Qatar National Bank QPSC		12,014		482,065
				1,300,101
Romania – 0.0%(e)
New Europe Property Investments PLC		9,180		95,300
Russia – 0.9%
Alrosa PJSC(b)		93,908		151,874
Gazprom PAO(b)		576,720		1,306,123
Lukoil PJSC(b)		20,450		1,087,617
Lukoil PJSC ADR		420		22,243
Magnit PJSC GDR		15,486		591,565
MMC Norilsk Nickel PJSC(b)		2,871		452,802
Mobile TeleSystems PJSC ADR		26,400		291,192
Moscow Exchange MICEX-RTS PJSC(b)		52,245		104,273
Novatek PJSC GDR		4,638		577,431
PhosAgro PJSC GDR		2,025		29,565
Rosneft Oil Co. PJSC(b)		61,450		353,375
Sberbank of Russia PJSC(b)		525,620		1,490,140
Severstal PAO(b)		8,250		119,456
Sistema PJSC FC GDR		2,473		22,133

See accompanying notes to schedules of investments.

49

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Russia – (continued)
Surgutneftegas OAO(b)		267,900	$	140,032
Surgutneftegas OJSC Preference Shares(b)		223,700		127,807
Tatneft PAO(b)		72,740		451,350
Transneft PJSC Preference Shares(b)		86		261,319
VTB Bank PJSC(b)		280,070,000		327,682
				7,907,979
Singapore – 0.9%
Ascendas REIT		139,575		251,720
CapitaLand Commercial Trust		90,400		99,956
CapitaLand Mall Trust REIT		82,000		115,609
CapitaLand, Ltd.		141,100		366,559
City Developments, Ltd.		16,200		118,257
ComfortDelGro Corp., Ltd.		69,000		126,415
DBS Group Holdings, Ltd.		87,363		1,212,941
Genting Singapore PLC		352,300		257,172
Global Logistic Properties, Ltd.		140,900		280,328
Golden Agri-Resources, Ltd.		309,500		85,277
Hutchison Port Holdings Trust		222,300		92,254
Jardine Cycle & Carriage, Ltd.		6,211		194,958
Keppel Corp., Ltd.		79,200		393,364
Oversea-Chinese Banking Corp., Ltd.		155,550		1,082,048
SATS, Ltd.		28,800		100,583
Sembcorp Industries, Ltd.		66,700		151,797
Singapore Airlines, Ltd.		18,000		129,722
Singapore Exchange, Ltd.		26,000		143,276
Singapore Press Holdings, Ltd.		51,000		129,571
Singapore Technologies Engineering, Ltd.		52,000		138,811
Singapore Telecommunications, Ltd.		393,900		1,105,051
StarHub, Ltd.		9,000		18,550
Suntec Real Estate Investment Trust		87,000		111,451
United Overseas Bank, Ltd.		64,240		1,016,493
UOL Group, Ltd.		21,340		106,448
Wilmar International, Ltd.		107,500		271,577
				8,100,188
South Africa – 1.4%
Anglo American Platinum, Ltd.(b)		458		10,455
AngloGold Ashanti, Ltd.		23,021		245,941
Aspen Pharmacare Holdings, Ltd.		19,295		395,318
Barclays Africa Group, Ltd.		23,372		243,172
Bid Corp., Ltd.		18,173		351,974
Bidvest Group, Ltd.		10,954		125,701
Brait SE(b)		12,378		72,189
Capitec Bank Holdings, Ltd.		832		47,242
Coronation Fund Managers, Ltd.		1,931		9,107
Discovery, Ltd.		12,616		121,100
Exxaro Resources, Ltd.		1,216		10,691
FirstRand, Ltd.		169,869		587,313
Fortress Income Fund, Ltd.		34,720		86,070
Fortress Income Fund, Ltd. Class A		16,870		21,124
Foschini Group, Ltd.		8,805		101,448
Gold Fields, Ltd.		25,059		87,406
Growthpoint Properties, Ltd. REIT		69,869		134,957
Hyprop Investments, Ltd.		16,182		148,077
Impala Platinum Holdings, Ltd.(b)		24,519		82,688
Imperial Holdings, Ltd.		2,948		36,276
Investec PLC		24,410		166,048
Investec, Ltd.		4,815		32,843
Liberty Holdings, Ltd.		972		7,847
Life Healthcare Group Holdings, Ltd.		36,795		79,552
Massmart Holdings, Ltd.		923		9,373
Mediclinic International PLC(a)		9,227		82,150
Mediclinic International PLC(a)		2,421		21,518
MMI Holdings, Ltd.		17,750		30,301
Mondi PLC		19,441		468,454
Mondi, Ltd.		4,978		118,993
Mr. Price Group, Ltd.		8,235		98,203
MTN Group, Ltd.		82,868		753,977
Naspers, Ltd. Class N		21,030		3,630,797
Nedbank Group, Ltd.		7,202		129,713
Netcare, Ltd.		41,109		78,485
Pick n Pay Stores, Ltd.		16,148		80,121
Pioneer Foods Group, Ltd.		1,601		21,087
PSG Group, Ltd.		6,572		121,062
Rand Merchant Investment Holdings, Ltd.		10,911		33,607
Redefine Properties, Ltd. REIT		287,611		236,159
Remgro, Ltd.		27,557		423,546
Resilient REIT, Ltd.		11,867		103,140
RMB Holdings, Ltd.		24,890		108,721
Sanlam, Ltd.		75,411		378,890
Sappi, Ltd.		20,656		140,385
Sasol, Ltd.		27,626		804,731
Shoprite Holdings, Ltd.		23,755		342,983
Sibanye Gold, Ltd.		19,869		42,527
SPAR Group, Ltd.		7,309		94,988
Standard Bank Group, Ltd.		65,053		697,408
Telkom SA SOC, Ltd.		13,170		73,694
Tiger Brands, Ltd.		9,196		274,637
Truworths International, Ltd.		16,502		106,590
Tsogo Sun Holdings, Ltd.		1,344		2,770
Vodacom Group, Ltd.		12,047		136,563
Woolworths Holdings, Ltd.		55,053		287,033
				13,137,145
South Korea – 3.3%
Amorepacific Corp.		1,684		422,393
Amorepacific Corp. Preference Shares		150		22,400
AMOREPACIFIC Group		926		98,951
BGF retail Co., Ltd.		220		20,656
BNK Financial Group, Inc.		10,927		89,699
Celltrion, Inc.(b)		4,242		341,772
Cheil Worldwide, Inc.		680		11,553
CJ CheilJedang Corp.		320		101,010
CJ Corp.		610		94,912

See accompanying notes to schedules of investments.

50

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
South Korea – (continued)
CJ E&M Corp.		257	$	19,534
CJ Korea Express Corp.(b)		100		14,889
Coway Co., Ltd.		1,750		150,541
Daelim Industrial Co., Ltd.		436		31,541
Daewoo Engineering & Construction Co., Ltd.(b)		380		2,464
DGB Financial Group, Inc.		2,699		26,186
Dongbu Insurance Co., Ltd.		1,790		102,441
Dongsuh Cos., Inc.		874		23,212
Doosan Heavy Industries & Construction Co., Ltd.		457		9,787
E-MART, Inc.		761		139,842
GS Engineering & Construction Corp.(b)		422		11,585
GS Holdings Corp.		3,356		177,358
GS Retail Co., Ltd.		360		16,965
Hana Financial Group, Inc.		15,590		515,113
Hankook Tire Co., Ltd.		2,490		121,349
Hanmi Pharm Co., Ltd.(b)		75		20,053
Hanmi Science Co., Ltd.(b)		184		9,609
Hanon Systems		8,270		68,627
Hanssem Co., Ltd.		770		151,480
Hanwha Chemical Corp.		6,970		164,543
Hanwha Corp.		620		19,903
Hanwha Life Insurance Co., Ltd.		1,840		9,938
Hanwha Techwin Co., Ltd.(b)		2,840		119,614
Hotel Shilla Co., Ltd.		540		21,778
Hyosung Corp.		1,344		162,847
Hyundai Department Store Co., Ltd.		192		17,341
Hyundai Development Co-Engineering & Construction		3,730		135,585
Hyundai Engineering & Construction Co., Ltd.		4,572		202,373
Hyundai Glovis Co., Ltd.		725		95,301
Hyundai Heavy Industries Co., Ltd.(b)		2,347		346,289
Hyundai Marine & Fire Insurance Co., Ltd.		2,670		83,564
Hyundai Mobis Co., Ltd.		3,409		733,135
Hyundai Motor Co.		7,630		1,074,600
Hyundai Motor Co. Preference Shares(a)		377		33,476
Hyundai Motor Co. Preference Shares(a)		1,291		119,484
Hyundai Steel Co.		2,695		140,980
Hyundai Wia Corp.		139		8,440
Industrial Bank of Korea		15,890		173,351
Kakao Corp.		2,034		151,145
Kangwon Land, Inc.		3,830		130,829
KB Financial Group, Inc.		19,951		874,183
KCC Corp.		90		28,490
KEPCO Plant Service & Engineering Co., Ltd.		180		10,044
Kia Motors Corp.		13,695		453,724
Korea Aerospace Industries, Ltd.		3,940		202,937
Korea Electric Power Corp.		13,310		552,848
Korea Gas Corp.(b)		340		13,666
Korea Investment Holdings Co., Ltd.		790		33,273
Korea Zinc Co., Ltd.		279		107,778
Korean Air Lines Co., Ltd.(b)		375		10,580
KT Corp.		110		3,138
KT&G Corp.		6,038		526,428
Kumho Petrochemical Co., Ltd.		118		8,315
LG Chem, Ltd.		2,360		620,442
LG Chem, Ltd. Preference Shares		93		15,842
LG Corp.		5,333		334,773
LG Display Co., Ltd.		12,610		341,100
LG Electronics, Inc.		5,971		362,542
LG Household & Health Care, Ltd.		503		364,780
LG Household & Health Care, Ltd. Preference Shares		50		22,802
LG Innotek Co., Ltd.		115		14,037
LG Uplus Corp.		12,590		160,992
Lotte Chemical Corp.		866		286,911
Lotte Chilsung Beverage Co., Ltd.		9		11,388
Lotte Confectionery Co., Ltd.		60		10,301
Lotte Shopping Co., Ltd.		645		125,447
Mirae Asset Daewoo Co., Ltd.		23,737		191,883
NAVER Corp.		1,389		1,061,965
NCSoft Corp.		581		158,459
NH Investment & Securities Co., Ltd.		1,200		13,467
OCI Co., Ltd.		142		10,755
Orion Corp.		148		88,670
Ottogi Corp.		17		11,553
POSCO		3,708		964,882
Posco Daewoo Corp.		570		12,156
S-1 Corp.		162		12,994
S-Oil Corp.		1,579		141,902
Samsung Biologics Co., Ltd.(b)		1,110		171,716
Samsung C&T Corp.		3,981		453,883
Samsung Card Co., Ltd.		501		17,562
Samsung Electro-Mechanics Co., Ltd.		2,049		127,341
Samsung Electronics Co., Ltd.		4,733		8,718,573
Samsung Electronics Co., Ltd. Preference Shares		870		1,247,080
Samsung Fire & Marine Insurance Co., Ltd.		1,756		420,824
Samsung Heavy Industries Co., Ltd.(b)		11,059		110,758
Samsung Life Insurance Co., Ltd.		3,760		364,804
Samsung SDI Co., Ltd.		3,068		378,596
Samsung SDS Co., Ltd.		1,120		133,703
Samsung Securities Co., Ltd.		1,166		35,085
Shinhan Financial Group Co., Ltd.		21,280		886,746
Shinsegae, Inc.		84		14,347
SK Holdings Co., Ltd.		2,387		519,748
SK Hynix, Inc.		28,670		1,294,675
SK Innovation Co., Ltd.		3,388		504,428
SK Networks Co., Ltd.		410		2,739
SK Telecom Co., Ltd.		668		150,528
Woori Bank		11,370		132,174

See accompanying notes to schedules of investments.

51

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
South Korea – (continued)
Yuhan Corp.		133	$	26,462
				30,637,657
Spain – 2.3%
Abertis Infraestructuras SA		33,448		540,192
ACS Actividades de Construccion y Servicios SA		10,405		354,949
Aena SA(c)		3,503		555,626
Amadeus IT Group SA		21,699		1,103,780
Banco Bilbao Vizcaya Argentaria SA		317,728		2,470,534
Banco de Sabadell SA		279,349		513,300
Banco Popular Espanol SA		107,122		104,261
Banco Santander SA		699,333		4,297,095
Bankia SA		165,279		188,441
Bankinter SA		37,198		313,149
CaixaBank SA		168,236		724,965
Distribuidora Internacional de Alimentacion SA		21,624		125,377
Enagas SA		12,408		323,148
Endesa SA		17,035		401,382
Ferrovial SA		25,536		512,374
Gas Natural SDG SA		18,841		413,909
Grifols SA		16,155		397,234
Iberdrola SA		272,101		1,951,326
Industria de Diseno Textil SA		52,913		1,869,835
Mapfre SA		30,119		103,567
Red Electrica Corp. SA		22,812		439,174
Repsol SA		56,345		872,318
Telefonica SA		225,019		2,523,414
Zardoya Otis SA		2,192		20,303
				21,119,653
Sweden – 1.9%
Alfa Laval AB		16,412		310,840
Assa Abloy AB Class B		46,801		966,077
Atlas Copco AB Class A		31,356		1,110,839
Atlas Copco AB Class B		18,267		582,691
Boliden AB		14,538		434,758
Electrolux AB Series B		13,130		366,328
Getinge AB Class B		6,654		117,157
Hennes & Mauritz AB Class B		44,333		1,137,087
Hexagon AB Class B		13,390		539,901
Husqvarna AB Class B		23,027		202,846
ICA Gruppen AB		2,978		101,998
Industrivarden AB Class C		4,587		99,721
Investor AB Class B		21,322		900,805
Kinnevik AB Class B		12,871		344,541
L E Lundbergforetagen AB Class B		1,618		110,092
Lundin Petroleum AB(b)		6,690		136,223
Nordea Bank AB		141,831		1,625,092
Sandvik AB		49,911		748,528
Securitas AB Class B		17,559		275,333
Skandinaviska Enskilda Banken AB Class A		70,928		792,035
Skanska AB Class B		17,968		424,633
SKF AB Class B		21,195		420,895
Svenska Cellulosa AB SCA Class B		28,473		921,642
Svenska Handelsbanken AB Class A		71,080		978,432
Swedbank AB Class A		42,286		983,230
Swedish Match AB		10,329		337,231
Tele2 AB Class B		13,500		129,356
Telefonaktiebolaget LM Ericsson Class B		143,682		962,354
Telia Co. AB		121,618		512,037
Volvo AB Class B		71,992		1,066,781
				17,639,483
Switzerland – 6.4%
ABB, Ltd.		91,129		2,133,126
Actelion, Ltd.		4,784		1,351,153
Adecco Group AG		8,315		591,051
Aryzta AG(b)		2,990		96,037
Baloise Holding AG		2,692		370,337
Barry Callebaut AG(b)		139		181,778
Chocoladefabriken Lindt & Spruengli AG(a)(b)		56		317,778
Chocoladefabriken Lindt & Spruengli AG(a)(b)		6		398,771
Cie Financiere Richemont SA		25,367		2,007,160
Coca-Cola HBC AG(b)		6,055		156,048
Credit Suisse Group AG(b)		96,693		1,439,358
Dufry AG(b)		2,498		380,833
EMS-Chemie Holding AG		469		273,402
Galenica AG		222		234,210
Geberit AG		1,859		801,954
Givaudan SA		460		829,052
Glencore PLC(b)		591,534		2,316,320
Julius Baer Group, Ltd.(b)		11,486		573,755
Kuehne + Nagel International AG		2,873		406,144
LafargeHolcim, Ltd.(a)(b)		21,503		1,271,769
LafargeHolcim, Ltd.(a)(b)		852		50,575
Lonza Group AG(b)		2,740		518,463
Nestle SA		148,686		11,415,674
Novartis AG		106,524		7,912,543
Pargesa Holding SA		1,409		99,663
Partners Group Holding AG		911		490,108
Roche Holding AG		33,513		8,564,489
Schindler Holding AG(a)		2,167		419,566
Schindler Holding AG(a)		679		128,820
SGS SA		280		597,792
Sika AG		111		666,477
Sonova Holding AG		2,869		398,126
STMicroelectronics NV		34,003		521,152
Swatch Group AG(a)		1,597		572,300
Swatch Group AG(a)		1,911		133,261
Swiss Life Holding AG(b)		1,662		536,649
Swiss Prime Site AG(b)		3,896		343,106
Swiss Re AG		15,785		1,418,513
Swisscom AG		1,320		609,393
Syngenta AG		4,489		1,982,703
UBS Group AG		175,750		2,814,599
Wolseley PLC		12,634		793,069
Zurich Insurance Group AG		7,279		1,944,557
				59,061,634

See accompanying notes to schedules of investments.

52

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Taiwan – 2.7%
Acer, Inc.(b)		24,000	$	11,390
Advanced Semiconductor Engineering, Inc.		351,650		449,088
Advantech Co., Ltd.		12,000		100,453
Asia Cement Corp.		140,000		141,188
Asia Pacific Telecom Co., Ltd.(b)		7,000		2,300
Asustek Computer, Inc.		38,000		375,711
AU Optronics Corp.		302,000		117,944
Catcher Technology Co., Ltd.		37,000		365,824
Cathay Financial Holding Co., Ltd.		415,000		666,079
Chailease Holding Co., Ltd.		68,480		160,014
Chang Hwa Commercial Bank, Ltd.		195,624		119,273
Cheng Shin Rubber Industry Co., Ltd.		64,000		132,250
Chicony Electronics Co., Ltd.		4,030		10,280
China Airlines, Ltd.		23,000		7,997
China Development Financial Holding Corp.		480,000		131,776
China Life Insurance Co., Ltd.		130,376		128,904
China Steel Corp.		613,000		511,128
Chunghwa Telecom Co., Ltd.		193,000		655,154
Compal Electronics, Inc.		169,000		110,281
CTBC Financial Holding Co., Ltd.		907,009		560,482
Delta Electronics, Inc.		100,630		538,926
E.Sun Financial Holding Co., Ltd.		446,968		271,783
Eclat Textile Co., Ltd.		8,022		80,372
Eva Airways Corp.		16,800		8,914
Evergreen Marine Corp. Taiwan, Ltd.(b)		23,170		10,843
Far Eastern New Century Corp.		128,620		111,484
Far EasTone Telecommunications Co., Ltd.		53,000		130,131
Feng TAY Enterprise Co., Ltd.		2,273		9,064
First Financial Holding Co., Ltd.		531,467		324,039
Formosa Chemicals & Fibre Corp.		166,000		516,451
Formosa Petrochemical Corp.		40,000		139,738
Formosa Plastics Corp.		211,000		629,332
Formosa Taffeta Co., Ltd.		3,000		3,203
Foxconn Technology Co., Ltd.		36,180		110,296
Fubon Financial Holding Co., Ltd.		341,000		556,299
Giant Manufacturing Co., Ltd.		4,000		23,663
Highwealth Construction Corp.		6,900		12,121
Hiwin Technologies Corp.		2,070		12,996
Hon Hai Precision Industry Co., Ltd.		749,650		2,248,271
Hotai Motor Co., Ltd.		9,000		105,446
HTC Corp.(b)		13,000		33,204
Hua Nan Financial Holdings Co., Ltd.		246,235		137,552
Innolux Corp.		310,000		128,220
Inventec Corp.		50,000		37,489
Largan Precision Co., Ltd.		5,000		787,674
Lite-On Technology Corp.		75,419		129,996
MediaTek, Inc.		77,000		545,604
Mega Financial Holding Co., Ltd.		572,601		462,346
Merida Industry Co., Ltd.		2,000		10,579
Micro-Star International Co., Ltd.		33,000		76,783
Nan Ya Plastics Corp.		244,000		578,186
Nanya Technology Corp.		18,000		28,712
Nien Made Enterprise Co., Ltd.		3,000		27,981
Novatek Microelectronics Corp.		24,000		92,939
OBI Pharma, Inc.(b)		1,000		8,997
Pegatron Corp.		108,000		319,631
Phison Electronics Corp.		2,000		17,962
Pou Chen Corp.		80,000		110,736
Powertech Technology, Inc.		9,000		26,191
President Chain Store Corp.		33,000		271,896
Quanta Computer, Inc.		150,000		305,018
Realtek Semiconductor Corp.		4,000		14,303
Ruentex Development Co., Ltd.(b)		8,280		9,919
Ruentex Industries, Ltd.		5,000		8,042
Shin Kong Financial Holding Co., Ltd.(b)		360,551		105,162
Siliconware Precision Industries Co., Ltd.		75,135		122,573
SinoPac Financial Holdings Co., Ltd.		274,641		85,716
Standard Foods Corp.		4,440		11,033
Synnex Technology International Corp.		70,550		75,915
TaiMed Biologics, Inc.(b)		4,000		23,465
Taishin Financial Holding Co., Ltd.		294,899		122,945
Taiwan Business Bank		64,119		17,751
Taiwan Cement Corp.		112,000		133,990
Taiwan Cooperative Financial Holding Co., Ltd.		271,084		134,905
Taiwan Fertilizer Co., Ltd.		7,000		9,689
Taiwan Mobile Co., Ltd.		89,000		327,050
Taiwan Semiconductor Manufacturing Co., Ltd.		1,176,000		7,325,171
Teco Electric and Machinery Co., Ltd.		90,000		91,505
Transcend Information, Inc.		1,000		3,276
Uni-President Enterprises Corp.		253,880		476,090
United Microelectronics Corp.		686,000		275,824
Vanguard International Semiconductor Corp.		39,000		74,292
Wistron Corp.		107,946		98,901
WPG Holdings, Ltd.		66,000		82,874
Yuanta Financial Holding Co., Ltd.		329,022		138,798
Yulon Motor Co., Ltd.		7,000		6,517
Zhen Ding Technology Holding, Ltd.		3,000		7,050
				24,521,340
Thailand – 0.5%
Advanced Info Service PCL		59,300		307,178
Airports of Thailand PCL		245,500		280,418
Bangkok Bank PCL NVDR		5,100		26,938
Bangkok Dusit Medical Services PCL		148,200		91,432

See accompanying notes to schedules of investments.

53

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Thailand – (continued)
Bangkok Expressway & Metro PCL		94,400	$	20,879
BEC World PCL		4,700		2,380
Berli Jucker PCL		55,900		75,645
BTS Group Holdings PCL		118,600		29,165
Bumrungrad Hospital PCL		16,400		87,339
Central Pattana PCL		56,000		92,485
Charoen Pokphand Foods PCL		108,500		87,621
CP ALL PCL		256,900		441,094
Delta Electronics Thailand PCL		5,400		13,750
Energy Absolute PCL		14,513		11,720
Glow Energy PCL		11,100		26,650
Home Product Center PCL		68,100		19,124
Indorama Ventures PCL		32,500		33,339
IRPC PCL		207,000		31,024
Kasikornbank PCL		45,000		247,508
Kasikornbank PCL NVDR		22,200		122,104
Krung Thai Bank PCL		67,900		40,310
Minor International PCL		94,050		100,585
PTT Exploration & Production PCL		47,500		128,556
PTT Global Chemical PCL		76,300		162,647
PTT PCL		51,300		577,755
Robinson Department Store PCL		12,700		23,654
Siam Cement PCL		40,800		641,164
Siam Commercial Bank PCL		93,200		442,098
Thai Oil PCL		16,600		36,473
Thai Union Group PCL		43,700		27,215
TMB Bank PCL		63,300		4,495
True Corp. PCL		216,512		42,846
				4,275,591
Turkey – 0.2%
Akbank TAS		124,014		290,483
Anadolu Efes Biracilik Ve Malt Sanayii A/S		1,760		9,574
Arcelik A/S		4,778		29,731
BIM Birlesik Magazalar A/S		6,928		106,346
Coca-Cola Icecek A/S		648		6,342
Emlak Konut Gayrimenkul Yatirim Ortakligi A/S		30,919		24,622
Eregli Demir ve Celik Fabrikalari TAS		83,264		134,900
Ford Otomotiv Sanayi A/S		1,307		12,777
Haci Omer Sabanci Holding A/S		31,533		86,590
KOC Holding A/S		24,944		105,142
Petkim Petrokimya Holding A/S		11,722		16,320
TAV Havalimanlari Holding A/S		1,388		5,523
Tofas Turk Otomobil Fabrikasi A/S		2,262		16,908
Tupras Turkiye Petrol Rafinerileri A/S		4,958		122,805
Turk Hava Yollari AO(b)		4,688		7,042
Turk Telekomunikasyon A/S		4,204		6,811
Turkcell Iletisim Hizmetleri A/S(b)		31,741		104,332
Turkiye Garanti Bankasi A/S		129,411		314,852
Turkiye Halk Bankasi A/S		29,437		83,825
Turkiye Is Bankasi Class C		62,875		114,470
Turkiye Sise ve Cam Fabrikalari A/S		6,184		7,081
Turkiye Vakiflar Bankasi TAO Class D		6,370		9,376
Ulker Biskuvi Sanayi A/S		1,307		6,625
Yapi ve Kredi Bankasi A/S(b)		7,385		7,706
				1,630,183
United Arab Emirates – 0.2%
Abu Dhabi Commercial Bank PJSC		114,059		211,163
Aldar Properties PJSC		47,482		29,216
DP World, Ltd.		10,129		217,773
Dubai Islamic Bank PJSC		85,420		130,235
Emaar Malls PJSC		24,972		17,949
Emaar Properties PJSC		187,326		372,306
Emirates Telecommunications Group Co. PJSC		91,075		447,564
First Gulf Bank PJSC		54,560		191,621
National Bank of Abu Dhabi PJSC		47,156		131,595
				1,749,422
United Kingdom – 11.2%
3i Group PLC		50,793		476,038
Aberdeen Asset Management PLC		30,660		101,483
Admiral Group PLC		11,866		295,125
Anglo American PLC(b)		69,381		1,058,007
Ashtead Group PLC		25,871		534,752
Associated British Foods PLC		18,171		592,133
AstraZeneca PLC		60,658		3,726,122
Auto Trader Group PLC(c)		55,276		271,157
Aviva PLC		199,091		1,324,432
Babcock International Group PLC		6,834		75,372
BAE Systems PLC		156,132		1,254,387
Barclays PLC		815,634		2,295,817
Barratt Developments PLC		54,530		372,642
Berkeley Group Holdings PLC		7,388		296,273
BP PLC		916,826		5,245,560
British American Tobacco PLC		89,512		5,932,306
British Land Co. PLC REIT		51,729		394,576
BT Group PLC		408,603		1,625,804
Bunzl PLC		17,508		507,915
Burberry Group PLC		23,314		502,598
Capita PLC		38,049		268,580
Carnival PLC		9,839		563,240
Centrica PLC		273,497		742,128
CNH Industrial NV		53,203		514,405
Cobham PLC		56,949		94,712
Coca-Cola European Partners PLC		11,597		434,745
Compass Group PLC		80,118		1,508,764
Croda International PLC		7,261		323,594
DCC PLC		4,747		416,996
Diageo PLC		120,863		3,451,126
Direct Line Insurance Group PLC		74,196		322,312
Dixons Carphone PLC		31,869		126,565
easyJet PLC		7,064		90,628
Fiat Chrysler Automobiles NV(b)		47,060		515,913
G4S PLC		88,045		335,022

See accompanying notes to schedules of investments.

54

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
United Kingdom – (continued)
GKN PLC		91,388	$	415,165
GlaxoSmithKline PLC		234,265		4,861,285
Hammerson PLC		43,494		310,550
Hargreaves Lansdown PLC		8,477		137,907
HSBC Holdings PLC		948,869		7,723,016
IMI PLC		9,126		136,140
Imperial Brands PLC		46,368		2,242,120
Inmarsat PLC		14,395		153,092
InterContinental Hotels Group PLC		9,800		478,902
International Consolidated Airlines Group SA		47,696		316,282
Intertek Group PLC		8,620		424,041
Intu Properties PLC		56,723		198,035
ITV PLC		188,398		515,690
J Sainsbury PLC		86,275		285,134
Johnson Matthey PLC		10,232		394,074
Kingfisher PLC		116,515		475,115
Land Securities Group PLC REIT		40,689		538,815
Legal & General Group PLC		295,356		913,348
Lloyds Banking Group PLC		3,094,991		2,566,672
London Stock Exchange Group PLC		16,094		638,156
Marks & Spencer Group PLC		87,413		368,360
Meggitt PLC		44,303		246,690
Merlin Entertainments PLC(c)		23,016		138,031
National Grid PLC		181,943		2,305,820
Next PLC		7,457		402,823
Old Mutual PLC		249,649		626,220
Pearson PLC		43,147		368,230
Persimmon PLC		16,471		431,284
Petrofac, Ltd.		10,300		118,364
Provident Financial PLC		8,161		305,842
Prudential PLC		124,225		2,618,985
Randgold Resources, Ltd.		4,966		432,508
Reckitt Benckiser Group PLC		30,453		2,774,506
RELX NV		49,617		921,258
RELX PLC		53,975		1,055,591
Rio Tinto PLC		59,688		2,395,470
Rio Tinto, Ltd.		21,039		970,359
Rolls-Royce Holdings PLC(b)		92,164		868,958
Royal Bank of Scotland Group PLC(b)		181,477		549,393
Royal Mail PLC		49,923		265,311
RSA Insurance Group PLC		54,143		397,079
Sage Group PLC		56,312		443,969
Schroders PLC		7,543		285,794
Segro PLC		55,921		319,004
Severn Trent PLC		12,700		378,279
Shire PLC		43,341		2,526,065
Sky PLC		52,280		638,046
Smith & Nephew PLC		45,045		684,931
Smiths Group PLC		21,109		427,347
SSE PLC		50,839		938,317
St James’s Place PLC		28,200		374,490
Standard Chartered PLC(b)		160,467		1,531,005
Standard Life PLC		102,512		454,676
Tate & Lyle PLC		27,005		258,159
Taylor Wimpey PLC		175,604		424,017
Tesco PLC(b)		403,655		936,817
Travis Perkins PLC		14,193		268,699
Unilever NV		78,180		3,894,062
Unilever PLC		61,824		3,045,542
United Utilities Group PLC		36,095		448,416
Vodafone Group PLC		1,276,827		3,322,542
Weir Group PLC		12,015		288,013
Whitbread PLC		9,560		473,151
William Hill PLC		52,760		191,852
Wm Morrison Supermarkets PLC		119,666		359,127
Worldpay Group PLC(c)		97,720		360,961
WPP PLC		62,671		1,372,989
				103,522,120
TOTAL COMMON STOCKS (Cost $842,770,368)				894,812,998
RIGHTS – 0.0%(e)
Germany – 0.0%(e)
Deutsche Bank AG (expiring 4/6/17)(b)		67,508		161,735
Qatar – 0.0%(e)
Doha Bank QSC (expiring 5/9/17)(b)		321		564
South Africa – 0.0%(e)
Life Healthcare Group Holdings, Ltd. (expiring 4/13/17)(b)		12,590		4,225
TOTAL RIGHTS (Cost $0)				166,524
SHORT-TERM INVESTMENT – 3.6%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(g)(h) (Cost $33,143,461)		33,143,461		33,143,461
TOTAL INVESTMENTS – 100.6% (Cost $875,913,829)				928,122,983
Liabilities in Excess of Other Assets – (0.6)%				(5,214,508	)
NET ASSETS – 100.0%			$	922,908,475

^(a)  Reflects separate holdings of the issuer’s common stock traded on different securities exchanges.

^(b)  Non-income producing security.

^(c)  Securities purchased pursuant to Rule 144A of the Securities Act of 1933. These securities, which represent 0.5% of net assets as of March 31, 2017, are considered liquid and may be resold in transactions exempt from registration, normally to qualified institutional buyers.

See accompanying notes to schedules of investments.

55

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

^(d)  Fair valued as determined in good faith by the Trust’s Oversight Committee in accordance with policy and procedures approved by the Board of Trustees. As of March 31, 2017, total aggregate fair value of the security is $3,567 representing 0.0% of the Fund’s net assets.

^(e)  Amount is less than 0.05% of net assets.

^(f)  Fair valued as determined in good faith by the Trust’s Oversight Committee in accordance with policy and procedures approved by the Board of Trustees. Security value is determined based on Level 3 inputs. As of March 31, 2017, total aggregate fair value of the security is $0, representing 0.0% of the Fund’s net assets.

^(g)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(h)  The rate shown is the annualized seven-day yield at March 31, 2017.

ADR	American Depositary Receipt
GDR	Global Depositary Receipt
NVDR	Non Voting Depositary Receipt
REIT	Real Estate Investment Trust
SDR	Swedish Depositary Receipt

At March 31, 2017, open futures contracts purchased were as follows:

Futures Contracts	Expiration Date		Number of Contracts		Notional Value		Unrealized Appreciation
Mini MSCI EAFE (long)		06/16/2017		244	$	21,740,400	$	339,814
Mini MSCI Emerging Markets Index (long)		06/16/2017		376		18,074,320		332,658
Total unrealized appreciation on open futures contracts purchased							$	672,472

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs			Total
Assets:
Investments:
Common Stocks
Australia	$	49,210,528	$	–	$	–		$	49,210,528
Austria		1,259,770		–		–			1,259,770
Belgium		7,446,457		–		–			7,446,457
Brazil		15,720,924		–		–			15,720,924
Canada		62,659,259		–		–			62,659,259
Chile		2,370,265		–		–			2,370,265
China		53,766,713		3,567		–			53,770,280
Colombia		624,590		–		–			624,590
Czech Republic		251,006		–		–			251,006
Denmark		10,647,670		–		–			10,647,670
Egypt		146,249		–		–			146,249
Finland		6,041,823		–		–			6,041,823
France		62,596,662		–		–			62,596,662
Germany		60,068,817		–		–			60,068,817
Greece		432,220		–		–			432,220
Hong Kong		22,956,758		–		0	(a)		22,956,758
Hungary		632,937		–		–			632,937
India		17,516,177		–		–			17,516,177
Indonesia		4,801,583		–		–			4,801,583
Ireland		4,327,080		–		–			4,327,080
Israel		4,217,608		–		–			4,217,608
Italy		12,255,406		–		–			12,255,406
Japan		147,150,838		225,195		–			147,376,033
Jordan		113,849		–		–			113,849
Luxembourg		2,129,078		–		–			2,129,078
Macau		217,076		–		–			217,076

See accompanying notes to schedules of investments.

56

State Street Institutional Investment Trust

State Street Global Equity ex-U.S. Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Malaysia	$	3,887,872	$	–	$	–	$	3,887,872
Mexico		7,249,471		–		–		7,249,471
Netherlands		28,458,252		–		–		28,458,252
New Zealand		1,020,665		–		–		1,020,665
Norway		4,111,061		–		–		4,111,061
Peru		845,257		–		–		845,257
Philippines		1,763,145		–		–		1,763,145
Poland		2,017,414		–		–		2,017,414
Portugal		971,960		–		–		971,960
Qatar		1,300,101		–		–		1,300,101
Romania		95,300		–		–		95,300
Russia		7,907,979		–		–		7,907,979
Singapore		8,100,188		–		–		8,100,188
South Africa		13,137,145		–		–		13,137,145
South Korea		30,637,657		–		–		30,637,657
Spain		21,119,653		–		–		21,119,653
Sweden		17,639,483		–		–		17,639,483
Switzerland		59,061,634		–		–		59,061,634
Taiwan		24,521,340		–		–		24,521,340
Thailand		1,037,714		3,237,877		–		4,275,591
Turkey		1,630,183		–		–		1,630,183
United Arab Emirates		1,749,422		–		–		1,749,422
United Kingdom		103,522,120		–		–		103,522,120
Rights
Germany		161,735		–		–		161,735
Qatar		–		564		–		564
South Africa		4,225		–		–		4,225
Short-Term Investment		33,143,461		–		–		33,143,461
Total Investments	$	924,655,780	$	3,467,203	$	0	$	928,122,983
Other Financial Instruments:
Futures Contracts (b)		672,472		–		–		672,472
Total Investments and Other Financial Instruments	$	925,328,252	$	3,467,203	$	0	$	928,795,455

^(a)  Fund held a Level 3 security that was valued at $0 at March 31, 2017.

^(b)  Futures Contracts are valued at unrealized appreciation (depreciation).

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income
State Street Institutional U.S. Government Money Market Fund, Premier Class		16,717,694	$	16,717,694		336,018,514		319,592,747		33,143,461	$	33,143,461	$	33,063
TOTAL			$	16,717,694							$	33,143,461	$	33,063

See accompanying notes to schedules of investments.

57

State Street Small/Mid Cap Equity Index Fund is a feeder fund that invests substantially all of its investable assets in a master fund, the State Street Small/Mid Cap Equity Index Portfolio. The portfolio of investments for the State Street Small/Mid Cap Equity Index Portfolio follows.

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – 96.3%
Aerospace & Defense – 1.6%
AAR Corp.		2,060	$	69,278
Aerojet Rocketdyne Holdings, Inc.(a)		3,800		82,460
Aerovironment, Inc.(a)		1,200		33,636
Astronics Corp.(a)		1,219		38,679
B/E Aerospace, Inc.		6,886		441,461
BWX Technologies, Inc.		6,390		304,164
Cubic Corp.		1,600		84,480
Curtiss-Wright Corp.		2,870		261,916
DigitalGlobe, Inc.(a)		4,100		134,275
Ducommun, Inc.(a)		600		17,274
Engility Holdings, Inc.(a)		1,100		31,834
Esterline Technologies Corp.(a)		1,900		163,495
HEICO Corp.		1,281		111,703
HEICO Corp. Class A		2,478		185,850
Hexcel Corp.		6,147		335,319
Huntington Ingalls Industries, Inc.		3,107		622,145
KEYW Holding Corp.(a)		3,400		32,096
KLX, Inc.(a)		3,743		167,312
Kratos Defense & Security Solutions, Inc.(a)		3,400		26,452
Mercury Systems, Inc.(a)		3,100		121,055
Moog, Inc. Class A(a)		2,054		138,337
National Presto Industries, Inc.		295		30,149
Orbital ATK, Inc.		3,894		381,612
Sparton Corp.(a)		600		12,594
Spirit AeroSystems Holdings, Inc. Class A		8,165		472,917
TASER International, Inc.(a)		3,492		79,583
Teledyne Technologies, Inc.(a)		2,250		284,535
Triumph Group, Inc.		3,245		83,559
Vectrus, Inc.(a)		600		13,410
				4,761,580
Air Freight & Logistics – 0.2%
Air Transport Services Group, Inc.(a)		3,200		51,360
Atlas Air Worldwide Holdings, Inc.(a)		1,682		93,267
Echo Global Logistics, Inc.(a)		1,700		36,295
Forward Air Corp.		2,000		95,140
Hub Group, Inc. Class A(a)		2,117		98,229
Park-Ohio Holdings Corp.		546		19,628
Radiant Logistics, Inc.(a)		2,300		11,500
XPO Logistics, Inc.(a)		6,600		316,074
				721,493
Airlines – 0.5%
Allegiant Travel Co.		896		143,584
Copa Holdings SA Class A		2,109		236,736
Hawaiian Holdings, Inc.(a)		3,445		160,020
JetBlue Airways Corp.(a)		21,636		445,918
SkyWest, Inc.		3,400		116,450
Spirit Airlines, Inc.(a)		4,758		252,507
				1,355,215
Auto Components – 1.1%
Adient PLC		6,200		450,554
American Axle & Manufacturing Holdings, Inc.(a)		5,100		95,778
Cooper Tire & Rubber Co.		3,600		159,660
Cooper-Standard Holdings, Inc.(a)		990		109,821
Dana, Inc.		9,694		187,191
Dorman Products, Inc.(a)		1,699		139,539
Fox Factory Holding Corp.(a)		1,400		40,180
Gentex Corp.		19,266		410,944
Gentherm, Inc.(a)		2,754		108,094
Horizon Global Corp.(a)		1,674		23,235
LCI Industries		1,539		153,592
Lear Corp.		4,619		653,958
Metaldyne Performance Group, Inc.		900		20,565
Modine Manufacturing Co.(a)		2,783		33,953
Motorcar Parts of America, Inc.(a)		1,100		33,803
Spartan Motors, Inc.		2,000		16,000
Standard Motor Products, Inc.		1,408		69,189
Stoneridge, Inc.(a)		1,582		28,697
Strattec Security Corp.		219		6,088
Superior Industries International, Inc.		1,488		37,721
Tenneco, Inc.		3,735		233,139
Tower International, Inc.		1,261		34,173
Unique Fabricating, Inc.		400		4,812
Visteon Corp.(a)		2,237		219,114
Workhorse Group, Inc.(a)		400		1,052
				3,270,852
Automobiles – 0.9%
Tesla, Inc.(a)		8,283		2,305,159
Thor Industries, Inc.		3,308		317,998
Winnebago Industries, Inc.		1,700		49,725
				2,672,882
Banks – 7.1%
1st Source Corp.		1,000		46,950
Access National Corp.		500		15,010
ACNB Corp.		500		14,425
Allegiance Bancshares, Inc.(a)		700		26,040
American National Bankshares, Inc.		500		18,625
Ameris Bancorp		2,200		101,420
Ames National Corp.		500		15,300
Arrow Financial Corp.		714		24,205
Associated Banc-Corp.		9,800		239,120
Atlantic Capital Bancshares, Inc.(a)		1,000		18,950
Banc of California, Inc.		3,400		70,380
BancFirst Corp.		476		42,792
Banco Latinoamericano de Comercio Exterior SA Class E		1,900		52,706

See accompanying notes to schedules of investments.

58

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Banks – (continued)
Bancorp, Inc.(a)		3,000	$	15,300
BancorpSouth, Inc.		6,055		183,164
Bank of Hawaii Corp.		2,934		241,644
Bank of Marin Bancorp		372		23,938
Bank of NT Butterfield & Son, Ltd.		700		22,337
Bank of the Ozarks, Inc.		5,754		299,266
BankUnited, Inc.		6,872		256,394
Bankwell Financial Group, Inc.		300		10,317
Banner Corp.		2,000		111,280
Bar Harbor Bankshares		881		29,127
Berkshire Hills Bancorp, Inc.		2,300		82,915
Blue Hills Bancorp, Inc.		1,526		27,239
BNC Bancorp		2,800		98,140
BOK Financial Corp.		1,684		131,807
Boston Private Financial Holdings, Inc.		5,100		83,640
Bridge Bancorp, Inc.		1,100		38,500
Brookline Bancorp, Inc.		4,800		75,120
Bryn Mawr Bank Corp.		1,000		39,500
C&F Financial Corp.		200		9,260
Camden National Corp.		982		43,247
Capital Bank Financial Corp. Class A		1,565		67,921
Capital City Bank Group, Inc.		700		14,973
Capstar Financial Holdings, Inc.(a)		200		3,814
Cardinal Financial Corp.		2,200		65,868
Carolina Financial Corp.		1,000		30,000
Cascade Bancorp(a)		1,901		14,657
Cathay General Bancorp		4,854		182,899
CenterState Banks, Inc.		3,400		88,060
Central Pacific Financial Corp.		1,879		57,385
Central Valley Community Bancorp		500		10,250
Century Bancorp, Inc. Class A		136		8,272
Chemical Financial Corp.		4,345		222,247
Chemung Financial Corp.		200		7,900
CIT Group, Inc.		13,311		571,441
Citizens & Northern Corp.		700		16,296
City Holding Co.		949		61,191
CNB Financial Corp.		800		19,112
CoBiz Financial, Inc.		2,200		36,960
Codorus Valley Bancorp, Inc.		520		13,473
Columbia Banking System, Inc.		3,800		148,162
Commerce Bancshares, Inc.		5,718		321,123
Community Bank System, Inc.		2,800		153,944
Community Trust Bancorp, Inc.		900		41,175
ConnectOne Bancorp, Inc.		1,823		44,208
County Bancorp, Inc.		300		8,718
CU Bancorp(a)		1,000		39,650
Cullen/Frost Bankers, Inc.		3,475		309,171
Customers Bancorp, Inc.(a)		1,900		59,907
CVB Financial Corp.		6,600		145,794
Eagle Bancorp, Inc.(a)		2,100		125,370
East West Bancorp, Inc.		9,585		494,682
Enterprise Bancorp, Inc.		578		20,091
Enterprise Financial Services Corp.		1,200		50,880
Equity Bancshares, Inc. Class A(a)		400		12,708
Farmers Capital Bank Corp.		449		18,140
Farmers National Banc Corp.		1,500		21,525
FB Financial Corp.(a)		400		14,144
FCB Financial Holdings, Inc. Class A(a)		1,982		98,208
Fidelity Southern Corp.		1,200		26,856
Financial Institutions, Inc.		800		26,360
First BanCorp(a)		7,100		40,115
First Bancorp, Inc.		600		16,350
First Bancorp/Southern Pines		1,200		35,148
First Busey Corp.		2,133		62,710
First Business Financial Services, Inc.		500		12,980
First Citizens BancShares, Inc. Class A		497		166,679
First Commonwealth Financial Corp.		5,600		74,256
First Community Bancshares, Inc.		900		22,473
First Community Financial Partners, Inc.(a)		800		10,200
First Connecticut Bancorp, Inc.		800		19,840
First Financial Bancorp		4,200		115,290
First Financial Bankshares, Inc.		4,151		166,455
First Financial Corp.		600		28,500
First Financial Northwest, Inc.		400		7,068
First Foundation, Inc.(a)		1,600		24,816
First Hawaiian, Inc.		1,500		44,880
First Horizon National Corp.		15,615		288,877
First Internet Bancorp		300		8,850
First Interstate BancSystem, Inc. Class A		1,200		47,580
First Merchants Corp.		2,678		105,299
First Mid-Illinois Bancshares, Inc.		500		16,920
First Midwest Bancorp, Inc.		5,100		120,768
First NBC Bank Holding Co.(a)		900		3,600
First Northwest Bancorp(a)		700		10,850
First of Long Island Corp.		1,250		33,812
First Republic Bank		10,179		954,892
Flushing Financial Corp.		1,700		45,679
FNB Corp.		20,833		309,787
Franklin Financial Network, Inc.(a)		655		25,381
Fulton Financial Corp.		11,300		201,705
German American Bancorp, Inc.		843		39,908
Glacier Bancorp, Inc.		4,900		166,257
Great Southern Bancorp, Inc.		668		33,734
Great Western Bancorp, Inc.		3,900		165,399
Green Bancorp, Inc.(a)		1,200		21,360
Guaranty Bancorp		1,000		24,350
Hancock Holding Co.		5,700		259,635
Hanmi Financial Corp.		2,200		67,650
HarborOne Bancorp, Inc.(a)		900		17,091
Heartland Financial USA, Inc.		1,600		79,920
Heritage Commerce Corp.		1,600		22,560
Heritage Financial Corp.		1,800		44,550
Heritage Oaks Bancorp		1,400		18,690
Hilltop Holdings, Inc.		4,900		134,603
Home BancShares, Inc.		7,800		211,146
HomeTrust Bancshares, Inc.(a)		1,000		23,500
Hope Bancorp, Inc.		8,588		164,632
Horizon Bancorp		1,200		31,464

See accompanying notes to schedules of investments.

59

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Banks – (continued)
IBERIABANK Corp.		3,292	$	260,397
Independent Bank Corp.(b)		1,200		24,840
Independent Bank Corp.(b)		1,633		106,145
Independent Bank Group, Inc.		751		48,289
International Bancshares Corp.		3,752		132,821
Investors Bancorp, Inc.		19,300		277,534
Lakeland Bancorp, Inc.		2,900		56,840
Lakeland Financial Corp.		1,528		65,887
LCNB Corp.		500		11,925
LegacyTexas Financial Group, Inc.		2,948		117,625
Live Oak Bancshares, Inc.		1,200		25,980
Macatawa Bank Corp.		1,600		15,808
MainSource Financial Group, Inc.		1,670		54,993
MB Financial, Inc.		4,900		209,818
MBT Financial Corp.		1,100		12,485
Mercantile Bank Corp.		1,000		34,400
Merchants Bancshares, Inc.		351		17,094
Middleburg Financial Corp.		300		12,012
Midland States Bancorp, Inc.		200		6,878
MidWestOne Financial Group, Inc.		451		15,465
MutualFirst Financial, Inc.		300		9,465
National Bank Holdings Corp. Class A		1,700		55,250
National Bankshares, Inc.		437		16,409
National Commerce Corp.(a)		463		16,946
NBT Bancorp, Inc.		2,700		100,089
Nicolet Bankshares, Inc.(a)		500		23,670
Northrim BanCorp, Inc.		400		12,020
OFG Bancorp		2,600		30,680
Old Line Bancshares, Inc.		500		14,240
Old National Bancorp		8,661		150,268
Old Second Bancorp, Inc.		1,700		19,125
Opus Bank		1,000		20,150
Orrstown Financial Services, Inc.		400		8,940
Pacific Continental Corp.		1,200		29,400
Pacific Mercantile Bancorp(a)		900		6,795
Pacific Premier Bancorp, Inc.(a)		1,800		69,390
PacWest Bancorp		7,779		414,309
Park National Corp.		899		94,575
Park Sterling Corp.		3,100		38,161
Peapack Gladstone Financial Corp.		900		26,631
Penns Woods Bancorp, Inc.		247		10,732
People’s Utah Bancorp		800		21,160
Peoples Bancorp, Inc.		1,000		31,660
Peoples Financial Services Corp.		439		18,350
Pinnacle Financial Partners, Inc.		3,088		205,198
Popular, Inc.		7,100		289,183
Preferred Bank		800		42,928
Premier Financial Bancorp, Inc.		530		11,146
PrivateBancorp, Inc.		5,272		312,999
Prosperity Bancshares, Inc.		4,522		315,229
QCR Holdings, Inc.		700		29,645
Renasant Corp.		2,861		113,553
Republic Bancorp, Inc. Class A		600		20,634
Republic First Bancorp, Inc.(a)		3,000		24,900
S&T Bancorp, Inc.		2,353		81,414
Sandy Spring Bancorp, Inc.		1,600		65,584
Seacoast Banking Corp. of Florida(a)		1,800		43,164
ServisFirst Bancshares, Inc.		3,000		109,140
Shore Bancshares, Inc.		800		13,368
Sierra Bancorp		700		19,201
Signature Bank(a)		3,506		520,255
Simmons First National Corp. Class A		1,900		104,785
South State Corp.		1,685		150,555
Southern First Bancshares, Inc.(a)		300		9,795
Southern National Bancorp of Virginia, Inc.		700		11,851
Southside Bancshares, Inc.		1,656		55,592
Southwest Bancorp, Inc.		1,100		28,765
State Bank Financial Corp.		2,500		65,300
Sterling Bancorp		8,400		199,080
Stock Yards Bancorp, Inc.		1,300		52,845
Stonegate Bank		800		37,672
Suffolk Bancorp		700		28,287
Summit Financial Group, Inc.		500		10,770
Sun Bancorp, Inc.		600		14,640
SVB Financial Group(a)		3,430		638,289
Synovus Financial Corp.		8,460		347,029
TCF Financial Corp.		10,400		177,008
Texas Capital Bancshares, Inc.(a)		3,246		270,879
Tompkins Financial Corp.		993		79,986
Towne Bank		4,100		132,840
TriCo Bancshares		1,476		52,442
TriState Capital Holdings, Inc.(a)		1,300		30,355
Triumph Bancorp, Inc.(a)		900		23,220
Trustmark Corp.		4,377		139,145
UMB Financial Corp.		2,985		224,800
Umpqua Holdings Corp.		14,287		253,451
Union Bankshares Corp.		2,900		102,022
Union Bankshares, Inc./Morrisville		200		8,590
United Bankshares, Inc.		4,751		200,730
United Community Banks, Inc.		4,585		126,959
Univest Corp. of Pennsylvania		1,544		39,990
Valley National Bancorp		16,300		192,340
Veritex Holdings, Inc.(a)		700		19,684
Washington Trust Bancorp, Inc.		913		45,011
WashingtonFirst Bankshares, Inc.		515		14,420
Webster Financial Corp.		6,200		310,248
WesBanco, Inc.		2,642		100,687
West Bancorp, Inc.		1,000		22,950
Westamerica Bancorporation		1,585		88,491
Western Alliance Bancorp(a)		6,365		312,458
Wintrust Financial Corp.		3,328		230,031
Xenith Bankshares, Inc.(a)		450		11,416
				20,658,402
Beverages – 0.1%
Boston Beer Co., Inc. Class A(a)		632		91,419
Coca-Cola Bottling Co. Consolidated		384		79,111
Craft Brew Alliance, Inc.(a)		800		10,680
MGP Ingredients, Inc.		800		43,384
National Beverage Corp.		800		67,624
Primo Water Corp.(a)		1,300		17,654
				309,872

See accompanying notes to schedules of investments.

60

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Biotechnology – 3.5%
ACADIA Pharmaceuticals, Inc.(a)		6,309	$	216,903
Acceleron Pharma, Inc.(a)		1,900		50,293
Achillion Pharmaceuticals, Inc.(a)		7,000		29,470
Acorda Therapeutics, Inc.(a)		2,700		56,700
Adamas Pharmaceuticals, Inc.(a)		1,000		17,500
Aduro Biotech, Inc.(a)		2,154		23,156
Advaxis, Inc.(a)		2,200		17,974
Adverum Biotechnologies, Inc.(a)		800		2,160
Aevi Genomic Medicine, Inc.(a)		1,600		2,976
Agenus, Inc.(a)		4,400		16,588
Agios Pharmaceuticals, Inc.(a)		2,068		120,771
Aimmune Therapeutics, Inc.(a)		1,600		34,768
Akebia Therapeutics, Inc.(a)		2,200		20,240
Alder Biopharmaceuticals, Inc.(a)		3,652		75,962
Alkermes PLC(a)		10,011		585,643
Alnylam Pharmaceuticals, Inc.(a)		4,909		251,586
AMAG Pharmaceuticals, Inc.(a)		2,100		47,355
Amicus Therapeutics, Inc.(a)		9,841		70,166
Anavex Life Sciences Corp.(a)		2,000		11,480
Anthera Pharmaceuticals, Inc.(a)		2,100		894
Applied Genetic Technologies Corp.(a)		787		5,430
Aptevo Therapeutics, Inc.(a)		550		1,133
AquaBounty Technologies, Inc.(a)		50		554
Ardelyx, Inc.(a)		1,900		24,035
Arena Pharmaceuticals, Inc.(a)		14,700		21,462
Argos Therapeutics, Inc.(a)		500		226
Array BioPharma, Inc.(a)		10,883		97,294
Arrowhead Pharmaceuticals, Inc.(a)		6,400		11,840
Asterias Biotherapeutics, Inc.(a)		1,400		4,760
Atara Biotherapeutics, Inc.(a)		1,400		28,770
Athersys, Inc.(a)		4,600		7,866
Audentes Therapeutics, Inc.(a)		300		5,112
Avexis, Inc.(a)		400		30,412
Axovant Sciences, Ltd.(a)		1,437		21,469
Bellicum Pharmaceuticals, Inc.(a)		1,282		15,820
BioCryst Pharmaceuticals, Inc.(a)		4,400		36,960
BioMarin Pharmaceutical, Inc.(a)		11,311		992,880
BioSpecifics Technologies Corp.(a)		326		17,865
BioTime, Inc.(a)		4,200		14,490
Bioverativ, Inc.(a)		7,200		392,112
Bluebird Bio, Inc.(a)		2,648		240,703
Blueprint Medicines Corp.(a)		1,500		59,985
Cara Therapeutics, Inc.(a)		1,300		23,907
Celldex Therapeutics, Inc.(a)		5,700		20,577
Cellular Biomedicine Group, Inc.(a)		700		8,260
ChemoCentryx, Inc.(a)		1,400		10,192
Chimerix, Inc.(a)		2,597		16,569
Cidara Therapeutics, Inc.(a)		800		6,240
Clovis Oncology, Inc.(a)		2,480		157,902
Coherus Biosciences, Inc.(a)		2,400		50,760
Concert Pharmaceuticals, Inc.(a)		1,000		17,060
Corvus Pharmaceuticals, Inc.(a)		200		4,154
Curis, Inc.(a)		6,700		18,626
Cytokinetics, Inc.(a)		2,000		25,700
CytomX Therapeutics, Inc.(a)		1,176		20,310
CytRx Corp.(a)		5,857		2,602
Dimension Therapeutics, Inc.(a)		700		1,225
Dynavax Technologies Corp.(a)		2,338		13,911
Eagle Pharmaceuticals, Inc.(a)		605		50,179
Edge Therapeutics, Inc.(a)		1,000		9,110
Editas Medicine, Inc.(a)		300		6,696
Eiger BioPharmaceuticals, Inc.(a)		200		2,290
Emergent BioSolutions, Inc.(a)		2,000		58,080
Enanta Pharmaceuticals, Inc.(a)		900		27,720
Epizyme, Inc.(a)		2,438		41,812
Esperion Therapeutics, Inc.(a)		900		31,779
Exact Sciences Corp.(a)		6,905		163,096
Exelixis, Inc.(a)		15,380		333,285
FibroGen, Inc.(a)		3,500		86,275
Five Prime Therapeutics, Inc.(a)		1,647		59,539
Flexion Therapeutics, Inc.(a)		1,600		43,056
Fortress Biotech, Inc.(a)		2,000		7,400
Foundation Medicine, Inc.(a)		800		25,800
Galena Biopharma, Inc.(a)		110		67
Genomic Health, Inc.(a)		1,100		34,639
Geron Corp.(a)		9,083		20,618
Global Blood Therapeutics, Inc.(a)		1,038		38,250
GlycoMimetics, Inc.(a)		400		2,172
Halozyme Therapeutics, Inc.(a)		7,352		95,282
Heron Therapeutics, Inc.(a)		2,517		37,755
Idera Pharmaceuticals, Inc.(a)		6,200		15,314
Ignyta, Inc.(a)		1,800		15,480
Immune Design Corp.(a)		500		3,400
ImmunoGen, Inc.(a)		5,100		19,737
Immunomedics, Inc.(a)		5,800		37,526
Infinity Pharmaceuticals, Inc.(a)		2,900		9,367
Inotek Pharmaceuticals Corp.(a)		600		1,200
Inovio Pharmaceuticals, Inc.(a)		4,011		26,553
Insmed, Inc.(a)		4,333		75,871
Insys Therapeutics, Inc.(a)		1,453		15,271
Intellia Therapeutics, Inc.(a)		400		5,636
Intercept Pharmaceuticals, Inc.(a)		1,092		123,505
Intrexon Corp.(a)		3,741		74,147
Invitae Corp.(a)		1,700		18,802
Ionis Pharmaceuticals, Inc.(a)		7,873		316,495
Ironwood Pharmaceuticals, Inc.(a)		8,400		143,304
Juno Therapeutics, Inc.(a)		4,002		88,804
Kadmon Holdings, Inc.(a)		500		1,810
Karyopharm Therapeutics, Inc.(a)		1,600		20,544
Keryx Biopharmaceuticals, Inc.(a)		4,703		28,970
Kite Pharma, Inc.(a)		2,573		201,955
La Jolla Pharmaceutical Co.(a)		800		23,880
Lexicon Pharmaceuticals, Inc.(a)		2,521		36,151
Ligand Pharmaceuticals, Inc.(a)		1,240		131,242
Lion Biotechnologies, Inc.(a)		3,400		25,330
Loxo Oncology, Inc.(a)		977		41,112
MacroGenics, Inc.(a)		1,900		35,340
MannKind Corp.(a)		3,900		5,772
MediciNova, Inc.(a)		1,800		10,782
Merrimack Pharmaceuticals, Inc.(a)		7,305		22,499
MiMedx Group, Inc.(a)		7,293		69,502
Minerva Neurosciences, Inc.(a)		1,100		8,910
Mirati Therapeutics, Inc.(a)		800		4,160
Momenta Pharmaceuticals, Inc.(a)		4,600		61,410
Myovant Sciences, Ltd.(a)		600		7,044

See accompanying notes to schedules of investments.

61

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Biotechnology – (continued)
Myriad Genetics, Inc.(a)		4,551	$	87,379
NantKwest, Inc.(a)		1,000		3,550
Natera, Inc.(a)		1,600		14,192
Neurocrine Biosciences, Inc.(a)		5,585		241,830
NewLink Genetics Corp.(a)		1,258		30,318
Novavax, Inc.(a)		16,200		20,736
OncoMed Pharmaceuticals, Inc.(a)		1,300		11,973
Ophthotech Corp.(a)		1,854		6,786
OPKO Health, Inc.(a)		22,680		181,440
Organovo Holdings, Inc.(a)		5,800		18,444
Otonomy, Inc.(a)		1,400		17,150
OvaScience, Inc.(a)		1,100		2,057
PDL BioPharma, Inc.		9,955		22,598
Pfenex, Inc.(a)		1,100		6,391
PharmAthene, Inc.		3,700		3,003
Portola Pharmaceuticals, Inc.(a)		3,241		127,015
Progenics Pharmaceuticals, Inc.(a)		4,200		39,648
Protagonist Therapeutics, Inc.(a)		500		6,405
Proteostasis Therapeutics, Inc.(a)		500		3,910
Prothena Corp. PLC(a)		2,300		128,317
PTC Therapeutics, Inc.(a)		2,000		19,680
Puma Biotechnology, Inc.(a)		1,962		72,986
Ra Pharmaceuticals, Inc.(a)		500		10,645
Radius Health, Inc.(a)		2,015		77,880
REGENXBIO, Inc.(a)		1,200		23,160
Regulus Therapeutics, Inc.(a)		2,300		3,795
Repligen Corp.(a)		2,100		73,920
Retrophin, Inc.(a)		2,200		40,612
Rigel Pharmaceuticals, Inc.(a)		7,800		25,818
Sage Therapeutics, Inc.(a)		2,000		142,140
Sangamo Therapeutics, Inc.(a)		4,200		21,840
Sarepta Therapeutics, Inc.(a)		3,182		94,187
Seattle Genetics, Inc.(a)		6,492		408,087
Selecta Biosciences, Inc.(a)		200		2,864
Seres Therapeutics, Inc.(a)		1,046		11,788
Sorrento Therapeutics, Inc.(a)		1,500		5,925
Spark Therapeutics, Inc.(a)		1,242		66,248
Spectrum Pharmaceuticals, Inc.(a)		4,700		30,550
Stemline Therapeutics, Inc.(a)		1,400		11,970
Syndax Pharmaceuticals, Inc.(a)		200		2,744
Synergy Pharmaceuticals, Inc.(a)		13,800		64,308
Synthetic Biologics, Inc.(a)		5,900		3,721
Syros Pharmaceuticals, Inc.(a)		300		4,779
T2 Biosystems, Inc.(a)		900		4,734
TESARO, Inc.(a)		1,927		296,507
TG Therapeutics, Inc.(a)		2,200		25,630
Trevena, Inc.(a)		2,700		9,909
Trovagene, Inc.(a)		1,500		1,725
Ultragenyx Pharmaceutical, Inc.(a)		2,565		173,856
United Therapeutics Corp.(a)		2,973		402,485
Vanda Pharmaceuticals, Inc.(a)		2,200		30,800
Versartis, Inc.(a)		1,900		40,565
Vital Therapies, Inc.(a)		1,400		5,600
Voyager Therapeutics, Inc.(a)		700		9,268
vTv Therapeutics, Inc. Class A(a)		500		3,275
XBiotech, Inc.(a)		1,000		16,490
Xencor, Inc.(a)		2,185		52,265
Zafgen, Inc.(a)		800		3,728
ZIOPHARM Oncology, Inc.(a)		7,300		46,282
				10,299,391
Building Products – 1.1%
AAON, Inc.		2,700		95,445
Advanced Drainage Systems, Inc.		2,100		45,990
American Woodmark Corp.(a)		859		78,856
AO Smith Corp.		9,716		497,071
Apogee Enterprises, Inc.		1,809		107,834
Armstrong Flooring, Inc.(a)		1,377		25,364
Armstrong World Industries, Inc.(a)		3,055		140,683
Builders FirstSource, Inc.(a)		5,700		84,930
Caesarstone, Ltd.(a)		1,527		55,354
Continental Building Products, Inc.(a)		2,200		53,900
CSW Industrials, Inc.(a)		837		30,718
Gibraltar Industries, Inc.(a)		2,100		86,520
Griffon Corp.		1,800		44,370
Insteel Industries, Inc.		1,100		39,754
JELD-WEN Holding, Inc.(a)		1,700		55,845
Lennox International, Inc.		2,627		439,497
Masonite International Corp.(a)		1,993		157,945
NCI Building Systems, Inc.(a)		1,628		27,920
Owens Corning		7,536		462,484
Patrick Industries, Inc.(a)		900		63,810
PGT Innovations, Inc.(a)		2,900		31,175
Ply Gem Holdings, Inc.(a)		1,300		25,610
Quanex Building Products Corp.		2,068		41,877
Simpson Manufacturing Co., Inc.		2,700		116,343
Trex Co., Inc.(a)		1,900		131,841
Universal Forest Products, Inc.		1,303		128,398
USG Corp.(a)		5,700		181,260
				3,250,794
Capital Markets – 1.5%
Arlington Asset Investment Corp. Class A		1,400		19,782
Artisan Partners Asset Management, Inc. Class A		2,355		64,998
Associated Capital Group, Inc. Class A		233		8,423
B. Riley Financial, Inc.		600		9,000
BGC Partners, Inc. Class A		14,100		160,176
Cohen & Steers, Inc.		1,309		52,321
Cowen Group, Inc. Class A(a)		1,550		23,173
Diamond Hill Investment Group, Inc.		202		39,299
Donnelley Financial Solutions, Inc.(a)		1,612		31,095
Eaton Vance Corp.		7,462		335,492
Evercore Partners, Inc. Class A		2,543		198,100
FBR & Co.		200		3,610
Federated Investors, Inc. Class B		6,300		165,942
Fifth Street Asset Management, Inc.		300		1,380
Financial Engines, Inc.		3,795		165,272
GAMCO Investors, Inc. Class A		233		6,894
Greenhill & Co., Inc.		1,717		50,308
Hennessy Advisors, Inc.		300		5,043
Houlihan Lokey, Inc.		700		24,115

See accompanying notes to schedules of investments.

62

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Capital Markets – (continued)
Interactive Brokers Group, Inc. Class A		4,300	$	149,296
INTL. FCStone, Inc.(a)		900		34,164
Investment Technology Group, Inc.		2,000		40,500
Janus Capital Group, Inc.		9,500		125,400
KCG Holdings, Inc. Class A(a)		3,100		55,273
Ladenburg Thalmann Financial Services, Inc.(a)		6,100		15,128
Lazard, Ltd. Class A		8,602		395,606
Legg Mason, Inc.		6,400		231,104
LPL Financial Holdings, Inc.		5,650		225,040
Manning & Napier, Inc.		900		5,130
Medley Management, Inc. Class A		300		2,490
Moelis & Co. Class A		1,500		57,750
OM Asset Management PLC		2,400		36,288
Oppenheimer Holdings, Inc. Class A		600		10,260
Piper Jaffray Cos.		900		57,465
PJT Partners, Inc. Class A		1,069		37,511
Pzena Investment Management, Inc. Class A		900		8,856
Safeguard Scientifics, Inc.(a)		1,200		15,240
SEI Investments Co.		8,525		430,001
Silvercrest Asset Management Group, Inc. Class A		400		5,320
Stifel Financial Corp.(a)		4,254		213,508
TD Ameritrade Holding Corp.		16,593		644,804
Virtu Financial, Inc. Class A		1,500		25,500
Virtus Investment Partners, Inc.		348		36,853
Waddell & Reed Financial, Inc. Class A		5,239		89,063
Westwood Holdings Group, Inc.		480		25,637
Wins Finance Holdings, Inc.(a)		79		11,454
WisdomTree Investments, Inc.		7,300		66,284
				4,415,348
Chemicals – 2.8%
A Schulman, Inc.		1,790		56,296
AdvanSix, Inc.(a)		1,900		51,908
AgroFresh Solutions, Inc.(a)		700		3,059
American Vanguard Corp.		1,652		27,423
Ashland Global Holdings, Inc.		4,169		516,164
Axalta Coating Systems, Ltd.(a)		11,102		357,484
Balchem Corp.		2,044		168,467
Cabot Corp.		4,088		244,912
Calgon Carbon Corp.		3,000		43,800
Celanese Corp. Series A		9,846		884,663
Chase Corp.		433		41,308
Chemours Co.		12,300		473,550
Chemtura Corp.(a)		4,271		142,651
Codexis, Inc.(a)		2,000		9,600
Ferro Corp.(a)		5,709		86,720
Flotek Industries, Inc.(a)		3,300		42,207
FutureFuel Corp.		1,500		21,270
GCP Applied Technologies, Inc.(a)		4,797		156,622
Hawkins, Inc.		600		29,400
HB Fuller Co.		3,399		175,253
Huntsman Corp.		13,400		328,836
Ingevity Corp.(a)		2,738		166,607
Innophos Holdings, Inc.		1,200		64,764
Innospec, Inc.		1,517		98,226
KMG Chemicals, Inc.		500		23,035
Koppers Holdings, Inc.(a)		1,400		59,290
Kraton Corp.(a)		1,800		55,656
Kronos Worldwide, Inc.		1,300		21,359
LSB Industries, Inc.(a)		1,200		11,256
Minerals Technologies, Inc.		2,243		171,814
NewMarket Corp.		483		218,910
Olin Corp.		10,900		358,283
OMNOVA Solutions, Inc.(a)		2,500		24,750
Platform Specialty Products Corp.(a)		12,700		165,354
PolyOne Corp.		5,559		189,506
Quaker Chemical Corp.		826		108,751
Rayonier Advanced Materials, Inc.		2,600		34,970
RPM International, Inc.		8,585		472,433
Scotts Miracle-Gro Co.		3,108		290,256
Sensient Technologies Corp.		2,878		228,110
Stepan Co.		1,282		101,034
TerraVia Holdings, Inc.(a)		4,700		3,405
Trecora Resources(a)		1,200		13,320
Tredegar Corp.		1,507		26,448
Trinseo SA		1,774		119,035
Tronox, Ltd. Class A		4,369		80,608
Valhi, Inc.		1,500		4,920
Valspar Corp.		5,223		579,440
Valvoline, Inc.		2,300		56,465
Westlake Chemical Corp.		2,580		170,409
WR Grace & Co.		4,776		332,935
				8,112,942
Commercial Services & Supplies – 1.5%
ABM Industries, Inc.		3,700		161,320
ACCO Brands Corp.(a)		6,716		88,315
Advanced Disposal Services, Inc.(a)		1,300		29,380
Aqua Metals, Inc.(a)		700		13,678
ARC Document Solutions, Inc.(a)		2,500		8,625
Brady Corp. Class A		2,900		112,085
Brink’s Co.		3,054		163,236
Casella Waste Systems, Inc. Class A(a)		2,300		32,453
CECO Environmental Corp.		1,756		18,456
Clean Harbors, Inc.(a)		3,644		202,679
Copart, Inc.(a)		6,638		411,091
Covanta Holding Corp.		7,800		122,460
Deluxe Corp.		3,181		229,573
Ennis, Inc.		1,500		25,500
Essendant, Inc.		2,249		34,072
Healthcare Services Group, Inc.		4,565		196,706
Heritage-Crystal Clean, Inc.(a)		800		10,960
Herman Miller, Inc.		3,900		123,045
HNI Corp.		2,889		133,154
InnerWorkings, Inc.(a)		2,300		22,908
Interface, Inc.		4,400		83,820
KAR Auction Services, Inc.		9,273		404,952
Kimball International, Inc. Class B		2,200		36,300
Knoll, Inc.		3,090		73,573
LSC Communications, Inc.		1,612		40,558

See accompanying notes to schedules of investments.

63

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Commercial Services & Supplies – (continued)
Matthews International Corp. Class A		2,131	$	144,162
McGrath RentCorp		1,500		50,355
Mobile Mini, Inc.		2,800		85,400
MSA Safety, Inc.		1,979		139,895
Multi-Color Corp.		921		65,391
NL Industries, Inc.(a)		300		1,935
Pitney Bowes, Inc.		12,700		166,497
Quad/Graphics, Inc.		2,000		50,480
Rollins, Inc.		6,363		236,258
RR Donnelley & Sons Co.		4,233		51,262
SP Plus Corp.(a)		1,300		43,875
Steelcase, Inc. Class A		5,800		97,150
Team, Inc.(a)		1,800		48,690
Tetra Tech, Inc.		3,700		151,145
TRC Cos., Inc.(a)		1,100		19,195
UniFirst Corp.		1,008		142,582
US Ecology, Inc.		1,396		65,403
Viad Corp.		1,254		56,681
VSE Corp.		480		19,584
West Corp.		2,973		72,601
				4,487,440
Communications Equipment – 1.9%
ADTRAN, Inc.		3,100		64,325
Aerohive Networks, Inc.(a)		1,400		5,894
Applied Optoelectronics, Inc.(a)		1,200		67,380
Arista Networks, Inc.(a)		2,599		343,770
ARRIS International PLC(a)		12,430		328,774
Bel Fuse, Inc. Class B		600		15,330
Black Box Corp.		900		8,055
Brocade Communications Systems, Inc.		26,981		336,723
CalAmp Corp.(a)		2,100		35,259
Calix, Inc.(a)		2,500		18,125
Ciena Corp.(a)		9,499		224,271
Clearfield, Inc.(a)		700		11,515
CommScope Holding Co., Inc.(a)		8,634		360,124
Comtech Telecommunications Corp.		1,400		20,636
Digi International, Inc.(a)		1,600		19,040
EchoStar Corp. Class A(a)		3,021		172,046
EMCORE Corp.		1,600		14,400
Extreme Networks, Inc.(a)		6,200		46,562
Finisar Corp.(a)		7,100		194,114
Harmonic, Inc.(a)		4,600		27,370
Infinera Corp.(a)		9,200		94,116
InterDigital, Inc.		2,238		193,140
Ixia(a)		4,100		80,565
KVH Industries, Inc.(a)		866		7,274
Lumentum Holdings, Inc.(a)		3,300		176,055
NETGEAR, Inc.(a)		2,200		109,010
NetScout Systems, Inc.(a)		6,200		235,290
Oclaro, Inc.(a)		7,100		69,722
Palo Alto Networks, Inc.(a)		5,793		652,755
Plantronics, Inc.		2,248		121,639
Quantenna Communications, Inc.(a)		400		8,332
SBA Communications Corp. REIT(a)		8,255		993,654
ShoreTel, Inc.(a)		3,990		24,539
Silicom, Ltd.		300		14,901
Sonus Networks, Inc.(a)		2,900		19,111
Ubiquiti Networks, Inc.(a)		2,000		100,520
ViaSat, Inc.(a)		3,511		224,072
Viavi Solutions, Inc.(a)		15,200		162,944
				5,601,352
Construction & Engineering – 0.7%
AECOM(a)		10,210		363,374
Aegion Corp.(a)		2,100		48,111
Ameresco, Inc. Class A(a)		1,300		8,515
Argan, Inc.		844		55,830
Chicago Bridge & Iron Co. NV		6,757		207,778
Comfort Systems USA, Inc.		2,443		89,536
Dycom Industries, Inc.(a)		2,138		198,727
EMCOR Group, Inc.		4,007		252,241
Granite Construction, Inc.		2,511		126,027
Great Lakes Dredge & Dock Corp.(a)		3,500		14,000
HC2 Holdings, Inc.(a)		2,000		12,400
IES Holdings, Inc.(a)		500		9,050
KBR, Inc.		10,288		154,629
Layne Christensen Co.(a)		1,100		9,724
MasTec, Inc.(a)		4,300		172,215
MYR Group, Inc.(a)		900		36,900
NV5 Global, Inc.(a)		400		15,040
Orion Group Holdings, Inc.(a)		1,600		11,952
Primoris Services Corp.		2,486		57,725
Tutor Perini Corp.(a)		2,600		82,680
Valmont Industries, Inc.		1,470		228,585
				2,155,039
Construction Materials – 0.2%
Eagle Materials, Inc.		3,127		303,757
Forterra, Inc.(a)		1,100		21,450
Headwaters, Inc.(a)		4,600		108,008
Summit Materials, Inc. Class A(a)		7,134		176,281
United States Lime & Minerals, Inc.		100		7,898
US Concrete, Inc.(a)		940		60,677
				678,071
Consumer Finance – 0.6%
Ally Financial, Inc.		29,661		603,008
Credit Acceptance Corp.(a)		584		116,455
Encore Capital Group, Inc.(a)		1,492		45,954
Enova International, Inc.(a)		1,600		23,760
EZCORP, Inc. Class A(a)		3,000		24,450
Firstcash, Inc.		3,078		151,284
Green Dot Corp. Class A(a)		2,900		96,744
LendingClub Corp.(a)		21,433		117,667
Nelnet, Inc. Class A		1,414		62,018
OneMain Holdings, Inc.(a)		3,562		88,516
PRA Group, Inc.(a)		3,014		99,914
Regional Management Corp.(a)		600		11,658
Santander Consumer USA Holdings, Inc.(a)		6,700		89,244

See accompanying notes to schedules of investments.

64

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Consumer Finance – (continued)
SLM Corp.(a)		28,700	$	347,270
World Acceptance Corp.(a)		385		19,935
				1,897,877
Containers & Packaging – 1.1%
AptarGroup, Inc.		4,231		325,745
Bemis Co., Inc.		6,340		309,772
Berry Plastics Group, Inc.(a)		8,417		408,814
Crown Holdings, Inc.(a)		8,852		468,713
Graphic Packaging Holding Co.		21,142		272,098
Greif, Inc. Class A		1,700		93,653
Greif, Inc. Class B		400		26,120
Multi Packaging Solutions International, Ltd.(a)		1,300		23,335
Myers Industries, Inc.		1,300		20,605
Owens-Illinois, Inc.(a)		10,800		220,104
Packaging Corp. of America		6,297		576,931
Silgan Holdings, Inc.		2,384		141,514
Sonoco Products Co.		6,748		357,104
UFP Technologies, Inc.(a)		400		10,360
				3,254,868
Distributors – 0.1%
Core-Mark Holding Co., Inc.		3,052		95,192
Pool Corp.		2,667		318,253
Weyco Group, Inc.		343		9,631
				423,076
Diversified Consumer Services – 0.7%
American Public Education, Inc.(a)		900		20,610
Ascent Capital Group, Inc. Class A(a)		600		8,478
Bridgepoint Education, Inc.(a)		1,100		11,737
Bright Horizons Family Solutions, Inc.(a)		2,842		206,017
Cambium Learning Group, Inc.(a)		500		2,450
Capella Education Co.		700		59,517
Career Education Corp.(a)		4,000		34,800
Carriage Services, Inc.		900		24,408
Chegg, Inc.(a)		4,800		40,512
Collectors Universe, Inc.		400		10,440
DeVry Education Group, Inc.		4,200		148,890
Graham Holdings Co. Class B		287		172,071
Grand Canyon Education, Inc.(a)		2,906		208,099
Houghton Mifflin Harcourt Co.(a)		7,800		79,170
K12, Inc.(a)		2,000		38,300
Laureate Education, Inc. Class A(a)		2,300		32,821
Liberty Tax, Inc.		400		5,700
Regis Corp.(a)		2,207		25,866
Service Corp. International		12,400		382,912
ServiceMaster Global Holdings, Inc.(a)		8,970		374,497
Sotheby’s(a)		3,486		158,543
Strayer Education, Inc.		714		57,470
Weight Watchers International, Inc.(a)		1,700		26,469
				2,129,777
Diversified Financial Services – 0.7%
FactSet Research Systems, Inc.		2,637		434,868
FNFV Group(a)		4,700		62,275
GAIN Capital Holdings, Inc.		2,200		18,326
MarketAxess Holdings, Inc.		2,425		454,663
Marlin Business Services Corp.		500		12,875
Morningstar, Inc.		1,192		93,691
MSCI, Inc.		5,762		560,009
NewStar Financial, Inc.		1,400		14,812
On Deck Capital, Inc.(a)		2,900		14,616
PICO Holdings, Inc.(a)		1,300		18,200
Tiptree, Inc. Class A		1,400		10,220
Voya Financial, Inc.		12,550		476,398
				2,170,953
Diversified Telecommunication Services – 0.5%
8x8, Inc.(a)		5,900		89,975
ATN International, Inc.		699		49,224
Cincinnati Bell, Inc.(a)		2,513		44,480
Cogent Communications Holdings, Inc.		2,696		116,063
Consolidated Communications Holdings, Inc.		3,200		74,944
FairPoint Communications, Inc.(a)		1,300		21,580
Frontier Communications Corp.		81,874		175,210
General Communication, Inc. Class A(a)		1,600		33,280
Globalstar, Inc.(a)		24,400		39,040
Hawaiian Telcom Holdco, Inc.(a)		400		9,164
IDT Corp. Class B		1,000		12,720
Intelsat SA(a)		1,847		7,665
Iridium Communications, Inc.(a)		4,919		47,468
Lumos Networks Corp.(a)		1,100		19,470
ORBCOMM, Inc.(a)		3,900		37,245
pdvWireless, Inc.(a)		600		13,110
Straight Path Communications, Inc. Class B(a)		600		21,582
Vonage Holdings Corp.(a)		12,200		77,104
Windstream Holdings, Inc.		12,011		65,460
Zayo Group Holdings, Inc.(a)		11,153		366,934
				1,321,718
Electric Utilities – 1.1%
ALLETE, Inc.		3,382		228,995
Avangrid, Inc.		3,700		158,138
El Paso Electric Co.		2,663		134,482
Genie Energy, Ltd. Class B		800		5,792
Great Plains Energy, Inc.		14,163		413,843
Hawaiian Electric Industries, Inc.		7,055		235,002
IDACORP, Inc.		3,284		272,441
MGE Energy, Inc.		2,262		147,030
OGE Energy Corp.		13,383		468,137
Otter Tail Corp.		2,476		93,840
PNM Resources, Inc.		5,151		190,587
Portland General Electric Co.		5,883		261,323
Spark Energy, Inc. Class A		300		9,585
Westar Energy, Inc.		9,514		516,325
				3,135,520

See accompanying notes to schedules of investments.

65

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Electrical Equipment – 0.5%
Allied Motion Technologies, Inc.		362	$	7,276
American Superconductor Corp.(a)		700		4,802
Atkore International Group, Inc.(a)		700		18,396
AZZ, Inc.		1,740		103,530
Babcock & Wilcox Enterprises, Inc.(a)		2,787		26,031
Encore Wire Corp.		1,254		57,684
Energous Corp.(a)		900		14,040
EnerSys		2,841		224,269
FuelCell Energy, Inc.(a)		1,316		1,809
Generac Holdings, Inc.(a)		4,249		158,403
General Cable Corp.		3,200		57,440
Hubbell, Inc.		3,700		444,185
LSI Industries, Inc.		1,400		14,126
Plug Power, Inc.(a)		10,800		14,904
Powell Industries, Inc.		500		17,220
Power Solutions International, Inc.(a)		300		3,027
Preformed Line Products Co.		200		10,430
Regal Beloit Corp.		2,933		221,881
Sunrun, Inc.(a)		3,800		20,520
Thermon Group Holdings, Inc.(a)		1,900		39,596
TPI Composites, Inc.(a)		400		7,604
Vicor Corp.(a)		970		15,617
				1,482,790
Electronic Equipment, Instruments & Components – 2.8%
Agilysys, Inc.(a)		957		9,044
Anixter International, Inc.(a)		1,886		149,560
Arrow Electronics, Inc.(a)		6,112		448,682
Avnet, Inc.		8,430		385,757
AVX Corp.		2,800		45,864
Badger Meter, Inc.		1,976		72,618
Belden, Inc.		2,713		187,713
Benchmark Electronics, Inc.(a)		3,680		117,024
CDW Corp.		10,861		626,788
Cognex Corp.		5,415		454,589
Coherent, Inc.(a)		1,600		329,024
Control4 Corp.(a)		1,212		19,138
CTS Corp.		1,900		40,470
Daktronics, Inc.		2,245		21,215
Dolby Laboratories, Inc. Class A		3,279		171,852
Electro Scientific Industries, Inc.(a)		1,600		11,152
ePlus, Inc.(a)		412		55,641
Fabrinet(a)		2,200		92,466
FARO Technologies, Inc.(a)		1,000		35,750
Fitbit, Inc. Class A(a)		7,609		45,045
II-VI, Inc.(a)		3,884		140,018
Insight Enterprises, Inc.(a)		2,352		96,644
InvenSense, Inc.(a)		5,675		71,675
IPG Photonics Corp.(a)		2,396		289,197
Itron, Inc.(a)		2,150		130,505
Jabil Circuit, Inc.		12,800		370,176
Keysight Technologies, Inc.(a)		11,261		406,973
Kimball Electronics, Inc.(a)		1,644		27,866
Knowles Corp.(a)		5,768		109,304
Littelfuse, Inc.		1,432		228,991
Maxwell Technologies, Inc.(a)		1,900		11,039
Mesa Laboratories, Inc.		199		24,417
Methode Electronics, Inc.		2,349		107,114
MTS Systems Corp.		1,043		57,417
National Instruments Corp.		6,793		221,180
Novanta, Inc.(a)		2,100		55,755
OSI Systems, Inc.(a)		1,175		85,763
Park Electrochemical Corp.		1,200		21,432
PC Connection, Inc.		700		20,853
Plexus Corp.(a)		2,200		127,160
Radisys Corp.(a)		2,100		8,400
Rogers Corp.(a)		1,221		104,847
Sanmina Corp.(a)		4,910		199,346
ScanSource, Inc.(a)		1,609		63,153
SYNNEX Corp.		1,967		220,186
Systemax, Inc.		700		7,763
Tech Data Corp.(a)		2,339		219,632
Trimble, Inc.(a)		16,881		540,361
TTM Technologies, Inc.(a)		4,800		77,424
Universal Display Corp.		2,684		231,092
VeriFone Systems, Inc.(a)		7,128		133,508
Vishay Intertechnology, Inc.		8,900		146,405
Vishay Precision Group, Inc.(a)		700		11,060
Zebra Technologies Corp. Class A(a)		3,478		317,368
				8,203,416
Energy Equipment & Services – 1.1%
Archrock, Inc.		4,600		57,040
Atwood Oceanics, Inc.(a)		4,600		43,838
Bristow Group, Inc.		2,000		30,420
CARBO Ceramics, Inc.(a)		1,331		17,356
Dawson Geophysical Co.(a)		1,200		6,672
Diamond Offshore Drilling, Inc.(a)		4,100		68,511
Dril-Quip, Inc.(a)		2,575		140,466
Ensco PLC Class A		20,200		180,790
Era Group, Inc.(a)		1,200		15,912
Exterran Corp.(a)		2,000		62,900
Fairmount Santrol Holdings, Inc.(a)		5,500		40,315
Forum Energy Technologies, Inc.(a)		4,039		83,607
Frank’s International NV		2,100		22,197
Geospace Technologies Corp.(a)		800		12,984
Helix Energy Solutions Group, Inc.(a)		9,009		70,000
Hornbeck Offshore Services, Inc.(a)		2,000		8,860
Independence Contract Drilling, Inc.(a)		1,800		9,918
Keane Group, Inc.(a)		2,000		28,600
Mammoth Energy Services, Inc.(a)		500		10,755
Matrix Service Co.(a)		1,600		26,400
McDermott International, Inc.(a)		15,800		106,650
Nabors Industries, Ltd.		17,887		233,783
Natural Gas Services Group, Inc.(a)		700		18,235
Newpark Resources, Inc.(a)		5,000		40,500
Noble Corp. PLC		16,000		99,040
Oceaneering International, Inc.		6,581		178,214
Oil States International, Inc.(a)		3,467		114,931
Parker Drilling Co.(a)		7,300		12,775
Patterson-UTI Energy, Inc.		10,600		257,262
PHI, Inc. NVDR(a)		700		8,386

See accompanying notes to schedules of investments.

66

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Energy Equipment & Services – (continued)
Pioneer Energy Services Corp.(a)		4,500	$	18,000
RigNet, Inc.(a)		800		17,160
Rowan Cos. PLC Class A(a)		8,212		127,943
RPC, Inc.		4,032		73,826
SEACOR Holdings, Inc.(a)		1,068		73,895
Seadrill, Ltd.(a)		22,683		37,427
Smart Sand, Inc.(a)		700		11,375
Superior Energy Services, Inc.(a)		9,900		141,174
Tesco Corp.(a)		2,800		22,540
TETRA Technologies, Inc.(a)		6,918		28,156
Tidewater, Inc.(a)		2,800		3,220
Unit Corp.(a)		3,448		83,304
US Silica Holdings, Inc.		4,888		234,575
Weatherford International PLC(a)		65,636		436,480
Willbros Group, Inc.(a)		2,600		7,124
				3,323,516
Equity Real Estate Investment Trusts (REITs) – 0.5%
Colony NorthStar, Inc. Class A REIT		36,518		471,447
CoreCivic, Inc. REIT		7,625		239,578
Global Net Lease, Inc. REIT		4,441		106,939
Invitation Homes, Inc. REIT(a)		5,900		128,797
MedEquities Realty Trust, Inc. REIT		1,200		13,452
Park Hotels & Resorts, Inc. REIT		7,706		197,813
Quality Care Properties, Inc. REIT(a)		6,100		115,046
Uniti Group, Inc. REIT(a)		8,000		206,800
				1,479,872
Food & Staples Retailing – 0.5%
Andersons, Inc.		1,685		63,861
Casey’s General Stores, Inc.		2,665		299,146
Chefs’ Warehouse, Inc.(a)		1,200		16,680
Ingles Markets, Inc. Class A		900		38,835
Natural Grocers by Vitamin Cottage, Inc.(a)		500		5,195
Performance Food Group Co.(a)		2,457		58,477
PriceSmart, Inc.		1,291		119,030
Rite Aid Corp.(a)		68,010		289,042
Smart & Final Stores, Inc.(a)		1,395		16,880
SpartanNash Co.		2,500		87,475
Sprouts Farmers Market, Inc.(a)		8,675		200,566
SUPERVALU, Inc.(a)		21,400		82,604
United Natural Foods, Inc.(a)		3,248		140,411
US Foods Holding Corp.(a)		2,828		79,127
Village Super Market, Inc. Class A		469		12,429
Weis Markets, Inc.		615		36,685
				1,546,443
Food Products – 2.0%
AdvancePierre Foods Holdings, Inc.		1,300		40,521
Alico, Inc.		200		5,280
Amplify Snack Brands, Inc.(a)		1,747		14,675
B&G Foods, Inc.		4,500		181,125
Blue Buffalo Pet Products, Inc.(a)		3,992		91,816
Bunge, Ltd.		9,234		731,887
Cal-Maine Foods, Inc.		2,000		73,600
Calavo Growers, Inc.		942		57,085
Darling Ingredients, Inc.(a)		10,700		155,364
Dean Foods Co.		6,000		117,960
Farmer Brothers Co.(a)		450		15,908
Flowers Foods, Inc.		11,431		221,876
Fresh Del Monte Produce, Inc.		2,134		126,397
Freshpet, Inc.(a)		1,300		14,300
Hain Celestial Group, Inc.(a)		6,679		248,459
Ingredion, Inc.		4,801		578,184
Inventure Foods, Inc.(a)		1,100		4,862
J&J Snack Foods Corp.		1,005		136,238
John B Sanfilippo & Son, Inc.		578		42,304
Lamb Weston Holdings, Inc.		9,800		412,188
Lancaster Colony Corp.		1,232		158,731
Landec Corp.(a)		1,600		19,200
Lifeway Foods, Inc.(a)		200		2,146
Limoneira Co.		700		14,637
Omega Protein Corp.		1,271		25,484
Pilgrim’s Pride Corp.		4,100		92,270
Pinnacle Foods, Inc.		7,600		439,812
Post Holdings, Inc.(a)		4,354		381,062
Sanderson Farms, Inc.		1,273		132,188
Seaboard Corp.		19		79,220
Seneca Foods Corp. Class A(a)		349		12,599
Snyder’s-Lance, Inc.		5,272		212,514
Tootsie Roll Industries, Inc.		1,136		42,436
TreeHouse Foods, Inc.(a)		3,739		316,544
WhiteWave Foods Co.(a)		11,610		651,901
				5,850,773
Gas Utilities – 1.0%
Atmos Energy Corp.		6,798		536,974
Chesapeake Utilities Corp.		1,038		71,830
Delta Natural Gas Co., Inc.		400		12,140
National Fuel Gas Co.		4,863		289,932
New Jersey Resources Corp.		5,803		229,799
Northwest Natural Gas Co.		1,860		109,926
ONE Gas, Inc.		3,387		228,961
South Jersey Industries, Inc.		5,285		188,410
Southwest Gas Holdings, Inc.		3,159		261,913
Spire, Inc.		3,139		211,882
UGI Corp.		11,553		570,718
WGL Holdings, Inc.		3,283		270,946
				2,983,431
Health Care Equipment & Supplies – 2.6%
Abaxis, Inc.		1,400		67,900
Abiomed, Inc.(a)		2,602		325,770
Accuray, Inc.(a)		4,800		22,800
Alere, Inc.(a)		5,699		226,421
Align Technology, Inc.(a)		4,884		560,244
Analogic Corp.		812		61,631
AngioDynamics, Inc.(a)		1,600		27,760
Anika Therapeutics, Inc.(a)		847		36,794
AtriCure, Inc.(a)		1,900		36,385
Atrion Corp.		82		38,392
Avinger, Inc.(a)		1,200		2,280
AxoGen, Inc.(a)		1,600		16,720
Cantel Medical Corp.		2,389		191,359
Cardiovascular Systems, Inc.(a)		1,950		55,136

See accompanying notes to schedules of investments.

67

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Health Care Equipment & Supplies – (continued)
Cerus Corp.(a)		6,100	$	27,145
ConforMIS, Inc.(a)		2,100		10,962
CONMED Corp.		1,801		79,982
Corindus Vascular Robotics, Inc.(a)		3,300		4,323
CryoLife, Inc.(a)		1,900		31,635
Cutera, Inc.(a)		700		14,490
DexCom, Inc.(a)		5,613		475,589
Endologix, Inc.(a)		4,823		34,919
Entellus Medical, Inc.(a)		400		5,520
Exactech, Inc.(a)		600		15,120
GenMark Diagnostics, Inc.(a)		2,600		33,332
Glaukos Corp.(a)		1,068		54,788
Globus Medical, Inc. Class A(a)		4,458		132,046
Haemonetics Corp.(a)		3,466		140,616
Halyard Health, Inc.(a)		3,100		118,079
Hill-Rom Holdings, Inc.		4,458		314,735
ICU Medical, Inc.(a)		994		151,784
Inogen, Inc.(a)		1,300		100,828
Insulet Corp.(a)		3,700		159,433
Integer Holdings Corp.(a)		1,983		79,717
Integra LifeSciences Holdings Corp.(a)		3,954		166,582
Invacare Corp.		1,900		22,610
InVivo Therapeutics Holdings Corp.(a)		1,900		7,695
iRadimed Corp.(a)		100		890
iRhythm Technologies, Inc.(a)		400		15,040
IRIDEX Corp.(a)		500		5,935
K2M Group Holdings, Inc.(a)		1,500		30,765
LeMaitre Vascular, Inc.		800		19,704
Masimo Corp.(a)		2,730		254,600
Meridian Bioscience, Inc.		2,500		34,500
Merit Medical Systems, Inc.(a)		2,900		83,810
Natus Medical, Inc.(a)		2,034		79,835
Neogen Corp.(a)		2,341		153,453
Nevro Corp.(a)		1,597		149,639
Novocure, Ltd.(a)		3,055		24,746
NuVasive, Inc.(a)		3,380		252,418
NxStage Medical, Inc.(a)		4,200		112,686
Obalon Therapeutics, Inc.(a)		300		3,207
OraSure Technologies, Inc.(a)		3,300		42,669
Orthofix International NV(a)		1,086		41,431
Oxford Immunotec Global PLC(a)		1,300		20,137
Penumbra, Inc.(a)		1,678		140,029
Quidel Corp.(a)		1,600		36,224
ResMed, Inc.		9,258		666,298
Rockwell Medical, Inc.(a)		2,900		18,154
RTI Surgical, Inc.(a)		3,400		13,600
Second Sight Medical Products, Inc.(a)		116		140
Senseonics Holdings, Inc.(a)		1,700		3,043
Spectranetics Corp.(a)		2,722		79,278
STAAR Surgical Co.(a)		2,400		23,520
Surmodics, Inc.(a)		800		19,240
Tactile Systems Technology, Inc.(a)		300		5,685
Tandem Diabetes Care, Inc.(a)		600		720
Teleflex, Inc.		2,960		573,441
TransEnterix, Inc.(a)		4,200		5,082
Utah Medical Products, Inc.		237		14,765
Varex Imaging Corp.(a)		2,400		80,640
Veracyte, Inc.(a)		1,000		9,180
West Pharmaceutical Services, Inc.		4,787		390,667
Wright Medical Group NV(a)		6,709		208,784
Zeltiq Aesthetics, Inc.(a)		2,400		133,464
				7,598,941
Health Care Providers & Services – 1.5%
AAC Holdings, Inc.(a)		600		5,118
Acadia Healthcare Co., Inc.(a)		4,799		209,236
Aceto Corp.		1,700		26,877
Addus HomeCare Corp.(a)		467		14,944
Adeptus Health, Inc. Class A(a)		868		1,562
Air Methods Corp.(a)		2,155		92,665
Almost Family, Inc.(a)		685		33,291
Amedisys, Inc.(a)		1,805		92,218
American Renal Associates Holdings, Inc.(a)		500		8,440
AMN Healthcare Services, Inc.(a)		3,148		127,809
BioScrip, Inc.(a)		10,000		17,000
BioTelemetry, Inc.(a)		1,800		52,110
Brookdale Senior Living, Inc.(a)		13,162		176,766
Capital Senior Living Corp.(a)		1,700		23,902
Chemed Corp.		1,075		196,392
Civitas Solutions, Inc.(a)		900		16,515
Community Health Systems, Inc.(a)		7,067		62,684
CorVel Corp.(a)		594		25,839
Cross Country Healthcare, Inc.(a)		1,900		27,284
Diplomat Pharmacy, Inc.(a)		2,763		44,070
Ensign Group, Inc.		3,070		57,716
Fulgent Genetics, Inc.(a)		600		6,552
Genesis Healthcare, Inc.(a)		2,200		5,808
HealthEquity, Inc.(a)		2,763		117,289
HealthSouth Corp.		6,000		256,860
Kindred Healthcare, Inc.		5,100		42,585
Landauer, Inc.		600		29,250
LHC Group, Inc.(a)		1,000		53,900
LifePoint Health, Inc.(a)		2,412		157,986
Magellan Health, Inc.(a)		1,562		107,856
MEDNAX, Inc.(a)		6,079		421,761
Molina Healthcare, Inc.(a)		2,854		130,142
National HealthCare Corp.		700		49,910
National Research Corp. Class A		500		9,850
Nobilis Health Corp.(a)		1,900		3,230
Owens & Minor, Inc.		4,138		143,175
PharMerica Corp.(a)		1,800		42,120
Premier, Inc. Class A(a)		3,045		96,922
Providence Service Corp.(a)		800		35,552
Quorum Health Corp.(a)		1,766		9,607
RadNet, Inc.(a)		2,200		12,980
Select Medical Holdings Corp.(a)		6,700		89,445
Surgery Partners, Inc.(a)		1,100		21,450
Teladoc, Inc.(a)		1,492		37,300
Tenet Healthcare Corp.(a)		5,069		89,772
Tivity Health, Inc.(a)		2,000		58,200

See accompanying notes to schedules of investments.

68

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Health Care Providers & Services – (continued)
Triple-S Management Corp. Class B(a)		1,389	$	24,405
UnitedHealth Group, Inc.		1		161
Universal American Corp.(a)		2,500		24,925
US Physical Therapy, Inc.		800		52,240
VCA, Inc.(a)		5,191		474,977
WellCare Health Plans, Inc.(a)		2,980		417,826
				4,336,474
Health Care Technology – 0.5%
Allscripts Healthcare Solutions, Inc.(a)		12,200		154,696
athenahealth, Inc.(a)		2,664		300,206
Castlight Health, Inc. Class B(a)		2,400		8,760
Computer Programs & Systems, Inc.		713		19,964
Cotiviti Holdings, Inc.(a)		800		33,304
Evolent Health, Inc. Class A(a)		1,000		22,300
HealthStream, Inc.(a)		1,700		41,191
HMS Holdings Corp.(a)		5,541		112,648
Inovalon Holdings, Inc. Class A(a)		3,600		45,360
Medidata Solutions, Inc.(a)		3,659		211,088
NantHealth, Inc.(a)		200		992
Omnicell, Inc.(a)		2,264		92,032
Quality Systems, Inc.(a)		3,100		47,244
Tabula Rasa HealthCare, Inc.(a)		200		2,696
Veeva Systems, Inc. Class A(a)		6,421		329,269
Vocera Communications, Inc.(a)		1,534		38,089
				1,459,839
Hotels, Restaurants & Leisure – 3.9%
Aramark		16,225		598,216
Belmond, Ltd. Class A(a)		5,700		68,970
Biglari Holdings, Inc.(a)		66		28,511
BJ’s Restaurants, Inc.(a)		1,600		64,640
Bloomin’ Brands, Inc.		7,000		138,110
Bob Evans Farms, Inc.		1,300		84,331
Bojangles’, Inc.(a)		600		12,300
Boyd Gaming Corp.(a)		5,400		118,854
Brinker International, Inc.		3,530		155,179
Buffalo Wild Wings, Inc.(a)		1,226		187,272
Caesars Acquisition Co. Class A(a)		2,900		44,660
Caesars Entertainment Corp.(a)		3,400		32,470
Carrols Restaurant Group, Inc.(a)		2,100		29,715
Century Casinos, Inc.(a)		1,300		9,828
Cheesecake Factory, Inc.		2,955		187,229
Choice Hotels International, Inc.		2,149		134,527
Churchill Downs, Inc.		888		141,059
Chuy’s Holdings, Inc.(a)		1,000		29,800
ClubCorp Holdings, Inc.		4,500		72,225
Cracker Barrel Old Country Store, Inc.		1,235		196,674
Dave & Buster’s Entertainment, Inc.(a)		2,448		149,548
Del Frisco’s Restaurant Group, Inc.(a)		1,400		25,270
Del Taco Restaurants, Inc.(a)		1,400		18,564
Denny’s Corp.(a)		5,200		64,324
DineEquity, Inc.		1,095		59,590
Domino’s Pizza, Inc.		3,369		620,907
Dunkin’ Brands Group, Inc.		6,180		337,922
El Pollo Loco Holdings, Inc.(a)		1,200		14,340
Eldorado Resorts, Inc.(a)		1,700		32,173
Empire Resorts, Inc.(a)		200		4,850
Extended Stay America, Inc.		4,700		74,918
Fiesta Restaurant Group, Inc.(a)		1,599		38,696
Fogo De Chao, Inc.(a)		300		4,875
Golden Entertainment, Inc.		600		7,938
Habit Restaurants, Inc. Class A(a)		800		14,160
Hilton Grand Vacations, Inc.(a)		3,341		95,753
Hilton Worldwide Holdings, Inc.		11,639		680,416
Hyatt Hotels Corp. Class A(a)		2,229		120,321
ILG, Inc.		7,399		155,083
International Game Technology PLC		6,500		154,050
International Speedway Corp. Class A		1,706		63,037
Intrawest Resorts Holdings, Inc.(a)		1,000		25,010
Isle of Capri Casinos, Inc.(a)		1,500		39,540
J Alexander’s Holdings, Inc.(a)		769		7,728
Jack in the Box, Inc.		2,280		231,922
Jamba, Inc.(a)		800		7,240
Kona Grill, Inc.(a)		500		3,150
La Quinta Holdings, Inc.(a)		5,800		78,416
Las Vegas Sands Corp.		24,164		1,379,039
Lindblad Expeditions Holdings, Inc.(a)		900		8,064
Luby’s, Inc.(a)		600		1,866
Marcus Corp.		1,100		35,310
Marriott Vacations Worldwide Corp.		1,468		146,697
MGM Resorts International		31,595		865,703
Monarch Casino & Resort, Inc.(a)		600		17,724
Nathan’s Famous, Inc.(a)		200		12,530
Noodles & Co. (a)		700		4,025
Norwegian Cruise Line Holdings, Ltd.(a)		10,626		539,057
Panera Bread Co. Class A(a)		1,544		404,327
Papa John’s International, Inc.		1,788		143,112
Penn National Gaming, Inc.(a)		4,700		86,621
Pinnacle Entertainment, Inc.(a)		3,500		68,320
Planet Fitness, Inc. Class A		1,600		30,832
Potbelly Corp.(a)		1,400		19,460
Red Lion Hotels Corp.(a)		900		6,345
Red Robin Gourmet Burgers, Inc.(a)		836		48,864
Red Rock Resorts, Inc. Class A		1,786		39,613
Ruby Tuesday, Inc.(a)		3,600		10,116
Ruth’s Hospitality Group, Inc.		1,900		38,095
Scientific Games Corp. Class A(a)		3,600		85,140
SeaWorld Entertainment, Inc.		4,190		76,551
Shake Shack, Inc. Class A(a)		930		31,062
Six Flags Entertainment Corp.		4,910		292,096
Sonic Corp.		2,870		72,783
Speedway Motorsports, Inc.		700		13,188
Texas Roadhouse, Inc.		4,455		198,381
Vail Resorts, Inc.		2,598		498,556
Wendy’s Co.		14,027		190,907
Wingstop, Inc.		970		27,432

See accompanying notes to schedules of investments.

69

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Hotels, Restaurants & Leisure – (continued)
Yum China Holdings, Inc.(a)		23,295	$	633,624
Zoe’s Kitchen, Inc.(a)		1,100		20,350
				11,510,101
Household Durables – 1.0%
Bassett Furniture Industries, Inc.		600		16,140
Beazer Homes USA, Inc.(a)		1,900		23,047
CalAtlantic Group, Inc.		5,266		197,212
Cavco Industries, Inc.(a)		588		68,443
Century Communities, Inc.(a)		900		22,860
CSS Industries, Inc.		500		12,960
Ethan Allen Interiors, Inc.		1,500		45,975
Flexsteel Industries, Inc.		400		20,160
GoPro, Inc. Class A(a)		6,600		57,420
Green Brick Partners, Inc.(a)		1,400		13,930
Helen of Troy, Ltd.(a)		1,826		172,009
Hooker Furniture Corp.		700		21,735
Hovnanian Enterprises, Inc. Class A(a)		7,300		16,571
Installed Building Products, Inc.(a)		1,300		68,575
iRobot Corp.(a)		1,800		119,052
KB Home		6,200		123,256
La-Z-Boy, Inc.		3,733		100,791
LGI Homes, Inc.(a)		900		30,519
Libbey, Inc.		1,342		19,566
Lifetime Brands, Inc.		700		14,070
M/I Homes, Inc. (a)		1,400		34,300
MDC Holdings, Inc.		2,965		89,098
Meritage Homes Corp.(a)		2,658		97,814
NACCO Industries, Inc. Class A		241		16,822
New Home Co., Inc.(a)		800		8,368
NVR, Inc.(a)		232		488,796
Taylor Morrison Home Corp. Class A(a)		2,800		59,696
Tempur Sealy International, Inc.(a)		3,449		160,241
Toll Brothers, Inc.(a)		10,483		378,541
TopBuild Corp.(a)		2,552		119,944
TRI Pointe Group, Inc.(a)		9,783		122,679
Tupperware Brands Corp.		3,281		205,784
UCP, Inc. Class A(a)		500		5,075
Universal Electronics, Inc.(a)		939		64,322
William Lyon Homes Class A(a)		1,400		28,868
ZAGG, Inc.(a)		1,700		12,240
				3,056,879
Household Products – 0.3%
Central Garden & Pet Co.(a)		600		22,242
Central Garden & Pet Co. Class A(a)		2,300		79,856
Energizer Holdings, Inc.		4,112		229,244
HRG Group, Inc.(a)		7,800		150,696
Oil-Dri Corp. of America		448		16,697
Orchids Paper Products Co.		560		13,440
Spectrum Brands Holdings, Inc.		1,618		224,918
WD-40 Co.		980		106,771
				843,864
Independent Power Producers & Energy Traders – 0.3%
Atlantic Power Corp.(a)		6,900		18,285
Atlantica Yield PLC		3,700		77,552
Calpine Corp.(a)		23,654		261,377
Dynegy, Inc.(a)		7,484		58,824
NRG Yield, Inc. Class A		2,100		36,519
NRG Yield, Inc. Class C		4,300		76,110
Ormat Technologies, Inc.		2,542		145,097
Pattern Energy Group, Inc.		4,500		90,585
TerraForm Global, Inc. Class A(a)		5,500		26,400
TerraForm Power, Inc. Class A(a)		6,000		74,220
Vivint Solar, Inc.(a)		1,400		3,920
				868,889
Industrial Conglomerates – 0.2%
Carlisle Cos., Inc.		4,193		446,177
Raven Industries, Inc.		2,500		72,625
				518,802
Insurance – 4.2%
Alleghany Corp.(a)		995		611,587
Allied World Assurance Co. Holdings AG		5,769		306,334
Ambac Financial Group, Inc.(a)		2,900		54,694
American Equity Investment Life Holding Co.		5,568		131,572
American Financial Group, Inc.		4,559		435,020
American National Insurance Co.		486		57,363
AMERISAFE, Inc.		1,181		76,647
AmTrust Financial Services, Inc.		5,770		106,514
Arch Capital Group, Ltd.(a)		7,646		724,611
Argo Group International Holdings, Ltd.		1,857		125,905
Aspen Insurance Holdings, Ltd.		3,988		207,575
Assured Guaranty, Ltd.		8,819		327,273
Athene Holding, Ltd. Class A(a)		1,800		89,982
Atlas Financial Holdings, Inc.(a)		600		8,190
Axis Capital Holdings, Ltd.		5,816		389,846
Baldwin & Lyons, Inc. Class B		500		12,225
Blue Capital Reinsurance Holdings, Ltd.		400		7,720
Brown & Brown, Inc.		7,853		327,627
Citizens, Inc.(a)		2,800		20,804
CNA Financial Corp.		1,699		75,045
CNO Financial Group, Inc.		11,708		240,014
Crawford & Co. Class B		691		6,931
Donegal Group, Inc. Class A		500		8,810
eHealth, Inc.(a)		1,100		13,244
EMC Insurance Group, Inc.		500		14,030
Employers Holdings, Inc.		2,000		75,900
Enstar Group, Ltd.(a)		783		149,788
Erie Indemnity Co. Class A		1,638		200,983
Everest Re Group, Ltd.		2,844		664,956
FBL Financial Group, Inc. Class A		626		40,972
Federated National Holding Co.		800		13,944
Fidelity & Guaranty Life		700		19,460
First American Financial Corp.		7,048		276,845
FNF Group		17,522		682,307
Genworth Financial, Inc. Class A(a)		33,000		135,960
Global Indemnity, Ltd.(a)		454		17,474

See accompanying notes to schedules of investments.

70

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Insurance – (continued)
Greenlight Capital Re, Ltd. Class A(a)		1,800	$	39,780
Hallmark Financial Services, Inc.(a)		841		9,293
Hanover Insurance Group, Inc.		2,826		254,510
HCI Group, Inc.		545		24,841
Heritage Insurance Holdings, Inc.		1,600		20,432
Horace Mann Educators Corp.		2,700		110,835
Independence Holding Co.		400		7,440
Infinity Property & Casualty Corp.		667		63,699
Investors Title Co.		86		13,601
James River Group Holdings, Ltd.		900		38,574
Kemper Corp.		2,583		103,062
Kinsale Capital Group, Inc.		400		12,816
Maiden Holdings, Ltd.		4,300		60,200
Markel Corp.(a)		906		884,129
MBIA, Inc.(a)		8,300		70,301
Mercury General Corp.		1,837		112,039
National General Holdings Corp.		3,299		78,384
National Western Life Group, Inc. Class A		177		53,836
Navigators Group, Inc.		1,492		81,016
Old Republic International Corp.		16,522		338,371
OneBeacon Insurance Group, Ltd. Class A		1,200		19,200
Patriot National, Inc.(a)		700		1,974
Primerica, Inc.		3,077		252,929
ProAssurance Corp.		3,542		213,405
Reinsurance Group of America, Inc.		4,278		543,220
RenaissanceRe Holdings, Ltd.		2,813		406,900
RLI Corp.		2,505		150,350
Safety Insurance Group, Inc.		938		65,754
Selective Insurance Group, Inc.		3,700		174,455
State Auto Financial Corp.		900		24,705
State National Cos., Inc.		1,800		25,920
Stewart Information Services Corp.		1,449		64,017
Third Point Reinsurance, Ltd.(a)		4,000		48,400
Trupanion, Inc.(a)		869		12,357
United Fire Group, Inc.		1,498		64,069
United Insurance Holdings Corp.		1,000		15,950
Universal Insurance Holdings, Inc.		2,000		49,000
Validus Holdings, Ltd.		4,992		281,499
White Mountains Insurance Group, Ltd.		277		243,727
WMIH Corp.(a)		12,134		17,594
WR Berkley Corp.		6,467		456,764
				12,167,500
Internet & Catalog Retail – 0.6%
1-800-Flowers.com, Inc. Class A(a)		1,600		16,320
Duluth Holdings, Inc. Class B(a)		599		12,753
Etsy, Inc.(a)		6,600		70,158
FTD Cos., Inc.(a)		1,000		20,140
Gaia, Inc.(a)		400		3,980
Groupon, Inc.(a)		23,122		90,869
HSN, Inc.		2,210		81,991
Lands’ End, Inc.(a)		900		19,305
Liberty Expedia Holdings, Inc. Class A(a)		3,787		172,233
Liberty Interactive Corp. QVC Group Class A(a)		27,662		553,793
Liberty TripAdvisor Holdings, Inc. Class A(a)		4,700		66,270
Liberty Ventures Series A(a)		5,280		234,854
Nutrisystem, Inc.		1,951		108,281
Overstock.com, Inc.(a)		800		13,760
PetMed Express, Inc.		1,200		24,168
Shutterfly, Inc.(a)		2,551		123,188
Travelport Worldwide, Ltd.		7,600		89,452
Wayfair, Inc. Class A(a)		2,051		83,045
				1,784,560
Internet Software & Services – 1.7%
2U, Inc.(a)		2,305		91,416
Actua Corp.(a)		2,200		30,910
Alarm.com Holdings, Inc.(a)		600		18,444
Amber Road, Inc.(a)		1,100		8,492
Angie’s List, Inc.(a)		2,435		13,880
Appfolio, Inc. Class A(a)		500		13,600
Apptio, Inc. Class A(a)		400		4,692
Autobytel, Inc.(a)		500		6,265
Bankrate, Inc.(a)		2,800		27,020
Bazaarvoice, Inc.(a)		4,900		21,070
Benefitfocus, Inc.(a)		741		20,711
Blucora, Inc.(a)		2,400		41,520
Box, Inc. Class A(a)		2,965		48,359
Brightcove, Inc.(a)		1,826		16,251
Carbonite, Inc.(a)		1,100		22,330
Care.com, Inc.(a)		800		10,008
ChannelAdvisor Corp.(a)		1,400		15,610
Cimpress NV(a)		1,630		140,490
CommerceHub, Inc. Series A(a)		846		13,096
CommerceHub, Inc. Series C(a)		1,693		26,292
Cornerstone OnDemand, Inc.(a)		3,351		130,320
CoStar Group, Inc.(a)		2,168		449,253
Coupa Software, Inc.(a)		500		12,700
DHI Group, Inc. (a)		3,000		11,850
Endurance International Group Holdings, Inc.(a)		3,635		28,535
Envestnet, Inc.(a)		2,852		92,120
Five9, Inc.(a)		2,027		33,364
Global Sources, Ltd.(a)		300		2,475
GoDaddy, Inc. Class A(a)		3,153		119,499
Gogo, Inc.(a)		3,410		37,510
GrubHub, Inc.(a)		5,352		176,027
GTT Communications, Inc.(a)		1,595		38,838
Hortonworks, Inc.(a)		2,578		25,290
IAC/InterActiveCorp(a)		4,611		339,923
Instructure, Inc.(a)		600		14,040
j2 Global, Inc.		3,064		257,100
Limelight Networks, Inc.(a)		4,300		11,094
Liquidity Services, Inc.(a)		1,500		12,000
LivePerson, Inc.(a)		3,200		21,920
LogMeIn, Inc.		3,460		337,350
Marchex, Inc. Class B(a)		2,000		5,440
Match Group, Inc.(a)		1,800		29,394
MeetMe, Inc.(a)		2,500		14,725
MINDBODY, Inc. Class A(a)		900		24,705

See accompanying notes to schedules of investments.

71

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Internet Software & Services – (continued)
New Relic, Inc.(a)		1,331	$	49,340
NIC, Inc.		4,000		80,800
Numerex Corp. Class A(a)		800		3,816
Nutanix, Inc. Class A(a)		900		16,893
Pandora Media, Inc.(a)		14,735		174,020
Q2 Holdings, Inc.(a)		1,600		55,760
QuinStreet, Inc.(a)		2,200		8,580
Quotient Technology, Inc.(a)		3,800		36,290
RealNetworks, Inc.(a)		1,400		6,776
Reis, Inc.		500		8,950
RetailMeNot, Inc.(a)		2,300		18,630
Rightside Group, Ltd.(a)		700		6,944
Shutterstock, Inc.(a)		1,150		47,553
SPS Commerce, Inc.(a)		1,051		61,473
Stamps.com, Inc.(a)		1,057		125,096
TechTarget, Inc.(a)		900		8,127
Trade Desk Inc Class A(a)		300		11,175
TrueCar, Inc.(a)		3,566		55,166
Twilio, Inc. Class A(a)		1,200		34,644
Twitter, Inc.(a)		42,386		633,671
Web.com Group, Inc.(a)		2,600		50,180
WebMD Health Corp.(a)		2,398		126,327
Xactly Corp.(a)		1,400		16,660
XO Group, Inc.(a)		1,511		26,004
Yelp, Inc.(a)		4,458		146,000
Zillow Group, Inc. Class A(a)		3,729		126,077
Zillow Group, Inc. Class C(a)		6,683		225,017
				4,975,897
It Services – 3.2%
Acxiom Corp.(a)		5,000		142,350
ALJ Regional Holdings, Inc.(a)		1,100		4,092
Amdocs, Ltd.		9,921		605,082
Black Knight Financial Services, Inc. Class A(a)		1,697		64,995
Blackhawk Network Holdings, Inc.(a)		3,553		144,252
Booz Allen Hamilton Holding Corp.		7,500		265,425
Broadridge Financial Solutions, Inc.		7,940		539,523
CACI International, Inc. Class A(a)		1,566		183,692
Cardtronics PLC Class A(a)		2,928		136,884
Cass Information Systems, Inc.		664		43,890
Computer Sciences Corp.		9,254		638,619
Convergys Corp.		6,042		127,788
CoreLogic, Inc.(a)		6,000		244,320
CSG Systems International, Inc.		2,000		75,620
DST Systems, Inc.		2,194		268,765
EPAM Systems, Inc.(a)		3,374		254,804
Euronet Worldwide, Inc.(a)		3,331		284,867
EVERTEC, Inc.		4,300		68,370
ExlService Holdings, Inc.(a)		2,137		101,208
First Data Corp. Class A(a)		21,047		326,228
FleetCor Technologies, Inc.(a)		6,071		919,332
Forrester Research, Inc.		600		23,850
Gartner, Inc.(a)		5,347		577,423
Genpact, Ltd.		9,517		235,641
Hackett Group, Inc.		1,390		27,091
Information Services Group, Inc.(a)		1,900		5,985
Jack Henry & Associates, Inc.		5,232		487,099
Leidos Holdings, Inc.		8,811		450,595
ManTech International Corp. Class A		1,558		53,954
MAXIMUS, Inc.		4,234		263,355
MoneyGram International, Inc.(a)		1,753		29,468
NCI, Inc. Class A(a)		400		6,020
NeuStar, Inc. Class A(a)		3,500		116,025
Perficient, Inc.(a)		2,100		36,456
PFSweb, Inc.(a)		900		5,877
Planet Payment, Inc.(a)		2,500		9,950
Sabre Corp.		13,588		287,930
Science Applications International Corp.		2,747		204,377
ServiceSource International, Inc.(a)		3,700		14,356
Square, Inc. Class A(a)		3,441		59,460
Sykes Enterprises, Inc.(a)		2,653		77,998
Syntel, Inc.		1,900		31,977
TeleTech Holdings, Inc.		1,000		29,600
Unisys Corp.(a)		3,000		41,850
Vantiv, Inc. Class A(a)		10,340		663,001
Virtusa Corp.(a)		1,700		51,374
WEX, Inc.(a)		2,541		262,993
				9,493,811
Leisure Equipment & Products – 0.4%
Acushnet Holdings Corp.(a)		1,400		24,192
American Outdoor Brands Corp.(a)		3,488		69,097
Brunswick Corp.		6,136		375,523
Callaway Golf Co.		6,512		72,088
Escalade, Inc.		600		7,740
JAKKS Pacific, Inc.(a)		796		4,378
Johnson Outdoors, Inc. Class A		300		10,950
Malibu Boats, Inc. Class A(a)		1,100		24,695
Marine Products Corp.		687		7,468
MCBC Holdings, Inc.		500		8,085
Nautilus, Inc.(a)		1,800		32,850
Polaris Industries, Inc.		4,086		342,407
Sturm Ruger & Co., Inc.		1,265		67,741
Vista Outdoor, Inc.(a)		4,221		86,910
				1,134,124
Life Sciences Tools & Services – 1.1%
Accelerate Diagnostics, Inc.(a)		1,400		33,880
Albany Molecular Research, Inc.(a)		1,596		22,392
Bio-Rad Laboratories, Inc. Class A(a)		1,391		277,282
Bio-Techne Corp.		2,423		246,298
Bruker Corp.		6,873		160,347
Cambrex Corp.(a)		2,100		115,605
Charles River Laboratories International, Inc.(a)		3,058		275,067
ChromaDex Corp.(a)		1,700		4,573
Enzo Biochem, Inc.(a)		2,400		20,088
Fluidigm Corp.(a)		1,744		9,923
INC Research Holdings, Inc. Class A(a)		2,694		123,520
Luminex Corp.		2,400		44,088
Medpace Holdings, Inc.(a)		500		14,925
NanoString Technologies, Inc.(a)		900		17,883

See accompanying notes to schedules of investments.

72

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Life Sciences Tools & Services – (continued)
NeoGenomics, Inc.(a)		3,200	$	25,248
Pacific Biosciences of California, Inc.(a)		4,800		24,816
PAREXEL International Corp.(a)		3,625		228,774
Patheon NV(a)		2,000		52,680
PRA Health Sciences, Inc.(a)		1,694		110,500
QIAGEN NV(a)		14,781		428,205
Quintiles IMS Holdings, Inc.(a)		9,427		759,156
VWR Corp.(a)		5,148		145,174
				3,140,424
Machinery – 3.7%
Actuant Corp. Class A		3,900		102,765
AGCO Corp.		4,588		276,106
Alamo Group, Inc.		592		45,105
Albany International Corp. Class A		1,948		89,705
Allison Transmission Holdings, Inc.		9,657		348,231
Altra Industrial Motion Corp.		1,674		65,202
American Railcar Industries, Inc.		496		20,386
Astec Industries, Inc.		1,240		76,254
Barnes Group, Inc.		3,256		167,163
Blue Bird Corp.(a)		200		3,430
Briggs & Stratton Corp.		2,700		60,615
Chart Industries, Inc.(a)		1,900		66,386
CIRCOR International, Inc.		1,047		62,234
Colfax Corp.(a)		6,438		252,756
Columbus McKinnon Corp.		1,200		29,784
Crane Co.		3,348		250,531
DMC Global, Inc.		800		9,920
Donaldson Co., Inc.		8,570		390,106
Douglas Dynamics, Inc.		1,377		42,205
Energy Recovery, Inc.(a)		2,100		17,472
EnPro Industries, Inc.		1,445		102,826
ESCO Technologies, Inc.		1,743		101,268
ExOne Co.(a)		700		7,133
Federal Signal Corp.		3,900		53,859
Franklin Electric Co., Inc.		3,049		131,260
FreightCar America, Inc.		700		8,771
Gencor Industries, Inc.(a)		500		7,475
Global Brass & Copper Holdings, Inc.		1,300		44,720
Gorman-Rupp Co.		1,100		34,540
Graco, Inc.		3,632		341,917
Graham Corp.		600		13,800
Greenbrier Cos., Inc.		1,694		73,011
Hardinge, Inc.		700		7,868
Harsco Corp.(a)		5,100		65,025
Hillenbrand, Inc.		4,000		143,400
Hurco Cos., Inc.		366		11,383
Hyster-Yale Materials Handling, Inc.		589		33,214
IDEX Corp.		5,142		480,828
ITT, Inc.		5,960		244,479
John Bean Technologies Corp.		1,890		166,226
Joy Global, Inc.		6,600		186,450
Kadant, Inc.		700		41,545
Kennametal, Inc.		5,484		215,137
Lincoln Electric Holdings, Inc.		4,086		354,910
Lindsay Corp.		652		57,454
Lydall, Inc.(a)		1,100		58,960
Manitowoc Co., Inc.(a)		7,600		43,320
Meritor, Inc.(a)		5,400		92,502
Middleby Corp.(a)		3,773		514,826
Milacron Holdings Corp.(a)		900		16,749
Miller Industries, Inc.		700		18,445
Mueller Industries, Inc.		3,700		126,651
Mueller Water Products, Inc. Class A		10,200		120,564
Navistar International Corp.(a)		3,300		81,246
NN, Inc.		1,616		40,723
Nordson Corp.		3,900		479,076
Omega Flex, Inc.		200		9,558
Oshkosh Corp.		5,008		343,499
Proto Labs, Inc.(a)		1,633		83,446
RBC Bearings, Inc.(a)		1,469		142,625
REV Group, Inc.(a)		800		22,056
Rexnord Corp.(a)		5,390		124,401
SPX Corp.(a)		2,800		67,900
SPX FLOW, Inc.(a)		2,200		76,362
Standex International Corp.		815		81,622
Sun Hydraulics Corp.		1,448		52,287
Supreme Industries, Inc. Class A		800		16,208
Tennant Co.		1,376		99,966
Terex Corp.		7,100		222,940
Timken Co.		4,900		221,480
Titan International, Inc.		2,700		27,918
Toro Co.		7,174		448,088
TriMas Corp.(a)		2,900		60,175
Trinity Industries, Inc.		9,769		259,367
Wabash National Corp.		4,300		88,967
WABCO Holdings, Inc.(a)		3,466		406,978
Wabtec Corp.		5,801		452,478
Watts Water Technologies, Inc. Class A		1,783		111,170
Welbilt, Inc.(a)		8,700		170,781
Woodward, Inc.		3,604		244,784
				10,732,973
Marine – 0.1%
Costamare, Inc.		1,800		11,988
Kirby Corp.(a)		3,440		242,692
Matson, Inc.		2,882		91,532
Scorpio Bulkers, Inc.(a)		3,333		30,664
				376,876
Media – 2.4%
AMC Entertainment Holdings, Inc. Class A		3,584		112,717
AMC Networks, Inc. Class A(a)		3,986		233,899
Cable One, Inc.		309		192,961
Central European Media Enterprises, Ltd. Class A(a)		4,600		14,260
Cinemark Holdings, Inc.		6,916		306,655
Clear Channel Outdoor Holdings, Inc. Class A		2,100		12,705
Daily Journal Corp.(a)		67		14,357
Entercom Communications Corp. Class A		1,600		22,880

See accompanying notes to schedules of investments.

73

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Media – (continued)
Entravision Communications Corp. Class A		3,900	$	24,180
Eros International PLC(a)		1,747		17,994
EW Scripps Co. Class A(a)		4,000		93,760
Gannett Co., Inc.		8,300		69,554
Global Eagle Entertainment, Inc.(a)		2,800		8,932
Gray Television, Inc.(a)		4,500		65,250
Hemisphere Media Group, Inc.(a)		300		3,525
IMAX Corp.(a)		3,800		129,200
John Wiley & Sons, Inc. Class A		2,950		158,710
Liberty Broadband Corp. Class A(a)		1,726		146,865
Liberty Broadband Corp. Class C(a)		6,909		596,938
Liberty Media Corp-Liberty Formula One Class A(a)		1,436		46,957
Liberty Media Corp.-Liberty Braves Class A(a)		594		14,220
Liberty Media Corp.-Liberty Braves Class C(a)		1,910		45,172
Liberty Media Corp.-Liberty Formula One Class C(a)		3,050		104,158
Liberty Media Corp.-Liberty SiriusXM Class A(a)		6,072		236,322
Liberty Media Corp.-Liberty SiriusXM Class C(a)		12,259		475,404
Lions Gate Entertainment Corp. Class A		3,124		82,973
Lions Gate Entertainment Corp. Class B(a)		6,958		169,636
Live Nation Entertainment, Inc.(a)		8,559		259,937
Loral Space & Communications, Inc.(a)		800		31,520
Madison Square Garden Co. Class A(a)		1,275		254,630
MDC Partners, Inc. Class A		3,100		29,140
Meredith Corp.		2,547		164,536
MSG Networks, Inc. Class A(a)		3,821		89,220
National CineMedia, Inc.		3,700		46,731
New Media Investment Group, Inc.		2,700		38,367
New York Times Co. Class A		8,100		116,640
Nexstar Media Group, Inc.		2,811		197,192
Radio One, Inc. Class D(a)		1,500		4,950
Reading International, Inc. Class A(a)		1,000		15,540
Regal Entertainment Group Class A		5,300		119,674
Saga Communications, Inc. Class A		244		12,456
Salem Media Group, Inc.		400		2,980
Scholastic Corp.		1,695		72,156
Sinclair Broadcast Group, Inc. Class A		4,362		176,661
Sirius XM Holdings, Inc.		118,958		612,634
Thomson Reuters Corp.		20,047		866,632
Time, Inc.		6,700		129,645
Townsquare Media, Inc. Class A(a)		500		6,090
Tribune Media Co. Class A		5,032		187,543
tronc, Inc.(a)		1,600		22,272
World Wrestling Entertainment, Inc. Class A		2,327		51,706
				6,909,036
Metals & Mining – 1.4%
AK Steel Holding Corp.(a)		20,800		149,552
Alcoa Corp.		9,900		340,560
Allegheny Technologies, Inc.		7,200		129,312
Ampco-Pittsburgh Corp.		500		7,025
Carpenter Technology Corp.		3,155		117,681
Century Aluminum Co.(a)		3,000		38,070
Cliffs Natural Resources, Inc.(a)		18,442		151,409
Coeur Mining, Inc.(a)		11,800		95,344
Commercial Metals Co.		7,600		145,388
Compass Minerals International, Inc.		2,214		150,220
Ferroglobe PLC		3,900		40,287
Ferroglobe Representation & Warranty Insurance Trust(a)(c)		2,200		–
Gold Resource Corp.		3,000		13,560
Handy & Harman, Ltd.(a)		100		2,720
Haynes International, Inc.		800		30,496
Hecla Mining Co.		25,084		132,694
Kaiser Aluminum Corp.		1,111		88,769
Materion Corp.		1,455		48,815
Olympic Steel, Inc.		600		11,136
Real Industry, Inc.(a)		1,528		4,355
Reliance Steel & Aluminum Co.		4,709		376,814
Royal Gold, Inc.		4,358		305,278
Ryerson Holding Corp.(a)		800		10,080
Schnitzer Steel Industries, Inc. Class A		1,572		32,462
Southern Copper Corp.		5,703		204,681
Steel Dynamics, Inc.		15,723		546,531
Stillwater Mining Co.(a)		8,000		138,160
SunCoke Energy, Inc.(a)		3,900		34,944
Tahoe Resources, Inc.		20,284		162,881
TimkenSteel Corp.(a)		2,400		45,384
United States Steel Corp.		10,400		351,624
Worthington Industries, Inc.		3,000		135,270
				4,041,502
Mortgage Real Estate Investment – 0.2%
AGNC Investment Corp. REIT		22,293		443,408
Multi-Utilities – 0.4%
Avista Corp.		4,100		160,105
Black Hills Corp.		3,393		225,533
MDU Resources Group, Inc.		12,800		350,336
NorthWestern Corp.		3,155		185,198
Unitil Corp.		900		40,527
Vectren Corp.		5,592		327,747
				1,289,446
Multiline Retail – 0.1%
Big Lots, Inc.		3,020		147,014
Dillard’s, Inc. Class A		1,105		57,725
Fred’s, Inc. Class A		2,100		27,510
JC Penney Co., Inc.(a)		20,100		123,816
Ollie’s Bargain Outlet Holdings, Inc.(a)		1,202		40,267

See accompanying notes to schedules of investments.

74

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Multiline Retail – (continued)
Sears Holdings Corp.(a)		700	$	8,043
Tuesday Morning Corp.(a)		2,700		10,125
				414,500
Oil, Gas & Consumable Fuels – 2.9%
Abraxas Petroleum Corp.(a)		9,000		18,180
Adams Resources & Energy, Inc.		66		2,465
Alon USA Energy, Inc.		1,900		23,161
Antero Resources Corp.(a)		12,174		277,689
Ardmore Shipping Corp.		1,700		13,685
Bill Barrett Corp.(a)		3,800		17,290
California Resources Corp.(a)		1,902		28,606
Callon Petroleum Co.(a)		12,004		157,973
Carrizo Oil & Gas, Inc.(a)		4,100		117,506
Cheniere Energy, Inc.(a)		13,368		631,905
Clayton Williams Energy, Inc.(a)		397		52,436
Clean Energy Fuels Corp.(a)		5,700		14,535
Cobalt International Energy, Inc.(a)		24,500		13,068
CONSOL Energy, Inc.		14,800		248,344
Contango Oil & Gas Co.(a)		1,300		9,516
Continental Resources, Inc.(a)		5,647		256,487
CVR Energy, Inc.		900		18,072
Delek US Holdings, Inc.		3,900		94,653
Denbury Resources, Inc.(a)		23,115		59,637
DHT Holdings, Inc.		5,496		24,567
Diamondback Energy, Inc.(a)		6,000		622,290
Dorian LPG, Ltd.(a)		1,500		15,795
Eclipse Resources Corp.(a)		3,400		8,636
Energen Corp.(a)		6,412		349,069
EP Energy Corp. Class A(a)		2,300		10,925
Erin Energy Corp.(a)		900		2,160
Evolution Petroleum Corp.		1,500		12,000
EXCO Resources, Inc.(a)		8,356		5,180
Extraction Oil & Gas, Inc.(a)		2,600		48,230
Frontline, Ltd.		4,420		29,791
GasLog, Ltd.		2,500		38,375
Gener8 Maritime, Inc.(a)		2,400		13,608
Golar LNG, Ltd.		6,200		173,166
Green Plains, Inc.		2,547		63,038
Gulfport Energy Corp.(a)		10,300		177,057
HollyFrontier Corp.		10,755		304,797
International Seaways, Inc.(a)		999		19,101
Isramco, Inc.(a)		44		5,155
Jagged Peak Energy, Inc.(a)		2,100		27,384
Jones Energy, Inc. Class A(a)		3,697		9,428
Kosmos Energy, Ltd.(a)		11,100		73,926
Laredo Petroleum, Inc.(a)		9,400		137,240
Matador Resources Co.(a)		5,900		140,361
Navios Maritime Acquisition Corp.		4,800		8,256
Nordic American Tankers, Ltd.		5,940		48,589
Northern Oil and Gas, Inc.(a)		2,800		7,280
Oasis Petroleum, Inc.(a)		15,400		219,604
Overseas Shipholding Group, Inc. Class A		2,300		8,878
Pacific Ethanol, Inc.(a)		1,700		11,645
Panhandle Oil and Gas, Inc. Class A		900		17,280
Par Pacific Holdings, Inc.(a)		1,889		31,150
Parsley Energy, Inc. Class A(a)		14,749		479,490
PBF Energy, Inc. Class A		7,049		156,276
PDC Energy, Inc.(a)		3,848		239,923
QEP Resources, Inc.(a)		15,623		198,568
Renewable Energy Group, Inc.(a)		2,300		24,035
REX American Resources Corp.(a)		387		35,020
Rice Energy, Inc.(a)		10,242		242,735
Ring Energy, Inc.(a)		2,500		27,050
RSP Permian, Inc.(a)		6,761		280,108
Sanchez Energy Corp.(a)		4,800		45,792
Scorpio Tankers, Inc.		9,800		43,512
SemGroup Corp. Class A		4,229		152,244
Ship Finance International, Ltd.		3,900		57,330
SM Energy Co.		6,656		159,877
SRC Energy, Inc.(a)		12,200		102,968
Targa Resources Corp.		11,810		707,419
Teekay Corp.		2,943		26,929
Teekay Tankers, Ltd. Class A		7,000		14,350
W&T Offshore, Inc.(a)		2,100		5,817
Western Refining, Inc.		5,362		188,045
Westmoreland Coal Co.(a)		1,100		15,972
Whiting Petroleum Corp.(a)		13,200		124,872
World Fuel Services Corp.		4,601		166,786
WPX Energy, Inc.(a)		25,400		340,106
				8,554,393
Paper & Forest Products – 0.3%
Boise Cascade Co.(a)		2,400		64,080
Clearwater Paper Corp.(a)		1,079		60,424
Deltic Timber Corp.		652		50,934
Domtar Corp.		4,014		146,591
KapStone Paper and Packaging Corp.		5,598		129,314
Louisiana-Pacific Corp.(a)		9,526		236,436
Neenah Paper, Inc.		1,046		78,136
PH Glatfelter Co.		2,800		60,872
Schweitzer-Mauduit International, Inc.		2,000		82,840
				909,627
Personal Products – 0.4%
Avon Products, Inc.(a)		29,200		128,480
Edgewell Personal Care Co.(a)		3,879		283,710
elf Beauty, Inc.(a)		600		17,280
Herbalife, Ltd.(a)		4,865		282,851
Inter Parfums, Inc.		1,300		47,515
Lifevantage Corp.(a)		800		4,296
Medifast, Inc.		600		26,622
Natural Health Trends Corp.		451		13,034
Nature’s Sunshine Products, Inc.		500		5,000
Nu Skin Enterprises, Inc. Class A		3,458		192,057
Nutraceutical International Corp.		500		15,575
Revlon, Inc. Class A(a)		700		19,495
Synutra International, Inc.(a)		1,300		7,735
USANA Health Sciences, Inc.(a)		608		35,021
				1,078,671
Pharmaceuticals – 0.9%
AcelRx Pharmaceuticals, Inc.(a)		2,100		6,615
Aclaris Therapeutics, Inc.(a)		658		19,622
Aerie Pharmaceuticals, Inc.(a)		1,800		81,630
Agile Therapeutics, Inc.(a)		800		2,564

See accompanying notes to schedules of investments.

75

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Pharmaceuticals – (continued)
Akorn, Inc.(a)		5,544	$	133,499
Amphastar Pharmaceuticals, Inc.(a)		2,100		30,450
Ampio Pharmaceuticals, Inc.(a)		2,900		2,320
ANI Pharmaceuticals, Inc.(a)		486		24,062
Aratana Therapeutics, Inc.(a)		2,000		10,600
Axsome Therapeutics, Inc.(a)		400		1,560
Bio-Path Holdings, Inc.(a)		5,300		4,384
Catalent, Inc.(a)		6,582		186,402
Cempra, Inc.(a)		4,200		15,750
Clearside Biomedical, Inc.(a)		300		2,382
Collegium Pharmaceutical, Inc.(a)		967		9,728
Corcept Therapeutics, Inc.(a)		4,900		53,704
Depomed, Inc.(a)		3,700		46,435
Dermira, Inc.(a)		1,500		51,165
Durect Corp.(a)		7,600		7,980
Egalet Corp.(a)		1,300		6,630
Endo International PLC(a)		13,600		151,776
Endocyte, Inc.(a)		2,300		5,911
Flex Pharma, Inc.(a)		400		1,760
Heska Corp.(a)		402		42,202
Horizon Pharma PLC(a)		10,737		158,693
Impax Laboratories, Inc.(a)		5,066		64,085
Innoviva, Inc.(a)		5,700		78,831
Intersect ENT, Inc.(a)		1,500		25,725
Intra-Cellular Therapies, Inc.(a)		2,056		33,410
Lannett Co., Inc.(a)		1,697		37,928
Lipocine, Inc.(a)		500		1,950
Medicines Co.(a)		4,359		213,155
MyoKardia, Inc.(a)		800		10,520
Nektar Therapeutics(a)		9,300		218,271
Neos Therapeutics, Inc.(a)		800		5,760
Novan, Inc.(a)		300		1,914
Ocular Therapeutix, Inc.(a)		1,100		10,208
Omeros Corp.(a)		2,400		36,288
Pacira Pharmaceuticals, Inc.(a)		2,437		111,127
Paratek Pharmaceuticals, Inc.(a)		1,100		21,175
Phibro Animal Health Corp. Class A		1,100		30,910
Prestige Brands Holdings, Inc.(a)		3,516		195,349
Reata Pharmaceuticals, Inc. Class A(a)		300		6,795
Revance Therapeutics, Inc.(a)		1,200		24,960
SciClone Pharmaceuticals, Inc.(a)		3,000		29,400
Sucampo Pharmaceuticals, Inc. Class A(a)		1,362		14,982
Supernus Pharmaceuticals, Inc.(a)		3,100		97,030
Teligent, Inc.(a)		2,500		19,525
Tetraphase Pharmaceuticals, Inc.(a)		2,200		20,218
TherapeuticsMD, Inc.(a)		9,500		68,400
Theravance Biopharma, Inc.(a)		2,704		99,561
Titan Pharmaceuticals, Inc.(a)		1,100		3,630
WaVe Life Sciences, Ltd.(a)		400		11,000
Zogenix, Inc.(a)		1,500		16,275
				2,566,206
Professional Services – 0.8%
Acacia Research Corp.(a)		3,000		17,250
Advisory Board Co.(a)		2,628		122,990
Barrett Business Services, Inc.		439		23,978
CBIZ, Inc.(a)		3,000		40,650
CEB, Inc.		2,232		175,435
Cogint, Inc.(a)		900		4,185
CRA International, Inc.		500		17,665
Exponent, Inc.		1,631		97,126
Franklin Covey Co.(a)		583		11,777
FTI Consulting, Inc.(a)		2,700		111,159
GP Strategies Corp.(a)		800		20,240
Heidrick & Struggles International, Inc.		1,100		28,985
Hill International, Inc.(a)		1,900		7,885
Huron Consulting Group, Inc.(a)		1,320		55,572
ICF International, Inc.(a)		1,102		45,513
Insperity, Inc.		1,043		92,462
Kelly Services, Inc. Class A		1,800		39,348
Kforce, Inc.		1,500		35,625
Korn/Ferry International		3,855		121,394
ManpowerGroup, Inc.		4,536		465,258
Mistras Group, Inc.(a)		987		21,102
Navigant Consulting, Inc.(a)		3,100		70,866
On Assignment, Inc.(a)		3,260		158,208
Resources Connection, Inc.		2,100		35,175
RPX Corp.(a)		3,000		36,000
TransUnion(a)		3,500		134,225
TriNet Group, Inc.(a)		2,800		80,920
TrueBlue, Inc.(a)		2,600		71,110
WageWorks, Inc.(a)		2,544		183,931
				2,326,034
Real Estate Investment Trusts (REITs) – 8.8%
Acadia Realty Trust		5,147		154,719
AG Mortgage Investment Trust, Inc. REIT		1,700		30,685
Agree Realty Corp. REIT		1,656		79,422
Alexander’s, Inc. REIT		173		74,712
Altisource Residential Corp. REIT		3,427		52,262
American Assets Trust, Inc. REIT		2,542		106,357
American Campus Communities, Inc.		8,572		407,941
American Homes 4 Rent Class A		11,497		263,971
Annaly Capital Management, Inc.		67,924		754,636
Anworth Mortgage Asset Corp. REIT		5,700		31,635
Apollo Commercial Real Estate Finance, Inc. REIT		5,440		102,326
Apple Hospitality REIT, Inc.		10,800		206,280
Ares Commercial Real Estate Corp. REIT		1,600		21,408
Armada Hoffler Properties, Inc. REIT		2,000		27,780
ARMOUR Residential REIT, Inc.		2,400		54,504
Ashford Hospitality Prime, Inc.		1,423		15,098
Ashford Hospitality Trust, Inc.		4,651		29,627
Bluerock Residential Growth REIT, Inc.		1,400		17,234
Brandywine Realty Trust		11,300		183,399
Brixmor Property Group, Inc.		12,891		276,641
Camden Property Trust		5,752		462,806
Capstead Mortgage Corp. REIT		6,110		64,399
Care Capital Properties, Inc.		5,652		151,869
CareTrust REIT, Inc.		4,400		74,008

See accompanying notes to schedules of investments.

76

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Real Estate Investment Trusts (REITs) – (continued)
CatchMark Timber Trust, Inc. Class A, REIT		2,300	$	26,496
CBL & Associates Properties, Inc.		11,100		105,894
Cedar Realty Trust, Inc.		4,953		24,864
Chatham Lodging Trust REIT		2,283		45,089
Chesapeake Lodging Trust		4,000		95,840
Chimera Investment Corp.		12,958		261,492
City Office REIT, Inc.		1,600		19,440
Colony Starwood Homes		4,219		143,235
Columbia Property Trust, Inc.		8,708		193,753
Community Healthcare Trust, Inc. REIT		800		19,120
CorEnergy Infrastructure Trust, Inc.		760		25,673
CoreSite Realty Corp. REIT		2,241		201,802
Corporate Office Properties Trust		6,300		208,530
Cousins Properties, Inc. REIT		23,665		195,710
CubeSmart REIT		12,142		315,206
CyrusOne, Inc. REIT		4,646		239,130
CYS Investments, Inc. REIT		10,300		81,885
DCT Industrial Trust, Inc. REIT		5,884		283,138
DDR Corp. REIT		20,303		254,397
DiamondRock Hospitality Co.		13,000		144,950
Douglas Emmett, Inc.		9,537		366,221
Duke Realty Corp.		23,158		608,361
DuPont Fabros Technology, Inc. REIT		4,853		240,660
Dynex Capital, Inc. REIT		2,700		19,143
Easterly Government Properties, Inc.		2,000		39,580
EastGroup Properties, Inc.		2,028		149,119
Education Realty Trust, Inc.		4,896		200,002
Empire State Realty Trust, Inc. Class A		7,924		163,551
EPR Properties		4,205		309,614
Equity Commonwealth(a)		7,943		247,980
Equity LifeStyle Properties, Inc.		5,170		398,400
Farmland Partners, Inc. REIT		2,100		23,457
FelCor Lodging Trust, Inc.		8,700		65,337
First Industrial Realty Trust, Inc. REIT		7,673		204,332
First Potomac Realty Trust		3,446		35,425
Forest City Realty Trust, Inc. Class A		15,401		335,434
Four Corners Property Trust, Inc. REIT		3,809		86,959
Franklin Street Properties Corp. REIT		6,561		79,651
Gaming and Leisure Properties, Inc.		12,596		420,958
GEO Group, Inc. REIT		4,800		222,576
Getty Realty Corp.		1,605		40,558
Gladstone Commercial Corp.		1,500		31,005
Global Medical REIT, Inc.		900		8,172
Government Properties Income Trust REIT		4,757		99,564
Gramercy Property Trust REIT		9,180		241,434
Great Ajax Corp.		900		11,745
Hannon Armstrong Sustainable Infrastructure Capital, Inc.		2,697		54,479
Healthcare Realty Trust, Inc. REIT		7,854		255,255
Healthcare Trust of America, Inc. Class A		9,166		288,362
Hersha Hospitality Trust		2,500		46,975
Highwoods Properties, Inc.		6,570		322,784
Hospitality Properties Trust		10,800		340,524
Hudson Pacific Properties, Inc. REIT		7,837		271,474
Independence Realty Trust, Inc.		3,473		32,542
InfraREIT, Inc.(a)		2,400		43,200
Invesco Mortgage Capital, Inc. REIT		7,600		117,192
Investors Real Estate Trust		7,300		43,289
iStar, Inc.(a)		4,500		53,100
Kilroy Realty Corp. REIT		6,451		464,988
Kite Realty Group Trust REIT		5,383		115,734
Ladder Capital Corp. REIT		2,628		37,948
Lamar Advertising Co. Class A		5,601		418,619
LaSalle Hotel Properties		7,076		204,850
Lexington Realty Trust REIT		15,400		153,692
Liberty Property Trust REIT		9,827		378,831
Life Storage, Inc. REIT		3,138		257,693
LTC Properties, Inc.		2,454		117,547
Mack-Cali Realty Corp.		5,800		156,252
Medical Properties Trust, Inc. REIT		19,077		245,903
MFA Financial, Inc.		24,700		199,576
Monmouth Real Estate Investment Corp.		4,279		61,061
Monogram Residential Trust, Inc.		11,100		110,667
MTGE Investment Corp.		2,800		46,900
National Health Investors, Inc. REIT		2,662		193,341
National Retail Properties, Inc.		9,400		410,028
National Storage Affiliates Trust		2,600		62,140
New Residential Investment Corp. REIT		19,900		337,902
New Senior Investment Group, Inc. REIT		4,600		46,920
New York Mortgage Trust, Inc. REIT		6,600		40,722
NexPoint Residential Trust, Inc.		1,100		26,576
NorthStar Realty Europe Corp. REIT		3,300		38,247
Omega Healthcare Investors, Inc.		12,332		406,833
One Liberty Properties, Inc.		800		18,688
Orchid Island Capital, Inc.		1,900		18,981
Outfront Media, Inc.		9,067		240,729
Owens Realty Mortgage, Inc. REIT		600		10,680
Paramount Group, Inc. REIT		12,000		194,520
Parkway, Inc. REIT		2,712		53,942
Pebblebrook Hotel Trust		4,700		137,287
Pennsylvania Real Estate Investment Trust		4,692		71,037
PennyMac Mortgage Investment Trust REIT		4,241		75,278
Physicians Realty Trust REIT		9,000		178,830

See accompanying notes to schedules of investments.

77

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Real Estate Investment Trusts (REITs) – (continued)
Piedmont Office Realty Trust, Inc. Class A		9,805	$	209,631
Potlatch Corp. REIT		2,600		118,820
Preferred Apartment Communities, Inc. Class A		1,400		18,494
PS Business Parks, Inc.		1,352		155,155
QTS Realty Trust, Inc. Class A, REIT		3,048		148,590
RAIT Financial Trust		5,493		17,578
Ramco-Gershenson Properties Trust		4,900		68,698
Rayonier, Inc.		8,162		231,311
Redwood Trust, Inc. REIT		5,200		86,372
Resource Capital Corp. REIT		1,775		17,342
Retail Opportunity Investments Corp. REIT		7,000		147,210
Retail Properties of America, Inc. Class A		15,700		226,394
Rexford Industrial Realty, Inc.		4,307		96,994
RLJ Lodging Trust REIT		8,512		200,117
Ryman Hospitality Properties, Inc.		2,827		174,793
Sabra Health Care REIT, Inc.		4,100		114,513
Saul Centers, Inc.		612		37,711
Select Income REIT		4,200		108,318
Senior Housing Properties Trust		16,077		325,559
Seritage Growth Properties Class A REIT		1,538		66,365
Silver Bay Realty Trust Corp. REIT		2,000		42,940
Spirit Realty Capital, Inc. REIT		32,277		326,966
STAG Industrial, Inc. REIT		5,500		137,610
Starwood Property Trust, Inc.		17,000		383,860
STORE Capital Corp.		9,847		235,146
Summit Hotel Properties, Inc. REIT		5,400		86,292
Sun Communities, Inc. REIT		4,399		353,372
Sunstone Hotel Investors, Inc. REIT		14,343		219,878
Tanger Factory Outlet Centers, Inc.		6,558		214,906
Taubman Centers, Inc.		3,848		254,045
Terreno Realty Corp.		3,000		84,000
Tier REIT, Inc.		3,155		54,771
Two Harbors Investment Corp.		23,100		221,529
UMH Properties, Inc.		1,500		22,815
Universal Health Realty Income Trust		800		51,600
Urban Edge Properties		6,000		157,800
Urstadt Biddle Properties, Inc. Class A, REIT		1,800		37,008
VEREIT, Inc.		64,919		551,162
Washington Prime Group, Inc. REIT		12,200		106,018
Washington Real Estate Investment Trust		4,902		153,335
Weingarten Realty Investors REIT		7,617		254,332
Western Asset Mortgage Capital Corp.		2,500		24,425
Whitestone REIT		1,700		23,528
WP Carey, Inc.		7,002		435,664
Xenia Hotels & Resorts, Inc. REIT		6,800		116,076
				25,699,762
Real Estate Management & Development – 0.5%
Alexander & Baldwin, Inc.		3,018		134,361
Altisource Portfolio Solutions SA(a)		700		25,760
AV Homes, Inc.(a)		700		11,515
Consolidated-Tomoka Land Co.		223		11,940
Forestar Group, Inc.(a)		2,100		28,665
FRP Holdings, Inc.(a)		345		13,800
HFF, Inc. Class A		2,446		67,681
Howard Hughes Corp.(a)		2,404		281,869
Jones Lang LaSalle, Inc.		3,105		346,052
Kennedy-Wilson Holdings, Inc.		5,400		119,880
Marcus & Millichap, Inc.(a)		900		22,122
RE/MAX Holdings, Inc. Class A		1,100		65,395
Realogy Holdings Corp.		9,625		286,729
RMR Group, Inc. Class A		446		22,077
St. Joe Co.(a)		3,200		54,560
Stratus Properties, Inc.		400		10,960
Tejon Ranch Co.(a)		800		17,512
Trinity Place Holdings, Inc.(a)		3,100		22,661
				1,543,539
Road & Rail – 0.6%
AMERCO		408		155,525
ArcBest Corp.		1,500		39,000
Avis Budget Group, Inc.(a)		5,202		153,875
Celadon Group, Inc.		1,600		10,480
Covenant Transportation Group, Inc. Class A(a)		700		13,160
Genesee & Wyoming, Inc. Class A(a)		4,166		282,705
Heartland Express, Inc.		2,800		56,140
Hertz Global Holdings, Inc.(a)		4,766		83,596
Knight Transportation, Inc.		4,400		137,940
Landstar System, Inc.		2,829		242,304
Marten Transport, Ltd.		1,393		32,666
Old Dominion Freight Line, Inc.		4,566		390,712
PAM Transportation Services, Inc.(a)		100		1,629
Roadrunner Transportation Systems, Inc.(a)		1,800		12,366
Saia, Inc.(a)		1,600		70,880
Swift Transportation Co.(a)		4,931		101,283
Universal Logistics Holdings, Inc.		500		7,175
USA Truck, Inc.(a)		300		2,205
Werner Enterprises, Inc.		3,000		78,600
YRC Worldwide, Inc.(a)		2,000		22,020
				1,894,261
Semiconductors & Semiconductor Equipment – 2.5%
Acacia Communications, Inc.(a)		300		17,586
Advanced Energy Industries, Inc.(a)		2,600		178,256
Alpha & Omega Semiconductor, Ltd.(a)		1,087		18,685
Ambarella, Inc.(a)		2,300		125,833

See accompanying notes to schedules of investments.

78

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Semiconductors & Semiconductor Equipment – (continued)
Amkor Technology, Inc.(a)		6,952	$	80,574
Axcelis Technologies, Inc.(a)		1,775		33,370
Brooks Automation, Inc.		4,300		96,320
Cabot Microelectronics Corp.		1,581		121,120
Cavium, Inc.(a)		4,201		301,044
CEVA, Inc.(a)		1,200		42,600
Cirrus Logic, Inc.(a)		4,140		251,257
Cohu, Inc.		1,600		29,536
Cree, Inc.(a)		6,700		179,091
Cypress Semiconductor Corp.		20,339		279,865
Diodes, Inc.(a)		2,692		64,743
DSP Group, Inc.(a)		1,300		15,600
Entegris, Inc.(a)		9,400		219,960
Exar Corp.(a)		2,400		31,224
First Solar, Inc.(a)		5,365		145,391
FormFactor, Inc.(a)		4,165		49,355
GigPeak, Inc.(a)		3,500		10,780
Impinj, Inc.(a)		400		12,108
Inphi Corp.(a)		2,549		124,442
Integrated Device Technology, Inc.(a)		9,111		215,657
IXYS Corp.		1,530		22,261
Kopin Corp.(a)		3,700		15,170
Lattice Semiconductor Corp.(a)		8,480		58,682
MACOM Technology Solutions Holdings, Inc.(a)		2,552		123,262
Marvell Technology Group, Ltd.		26,662		406,862
Maxim Integrated Products, Inc.		18,825		846,372
MaxLinear, Inc.(a)		3,800		106,590
Microsemi Corp.(a)		7,647		394,050
MKS Instruments, Inc.		3,447		236,981
Monolithic Power Systems, Inc.		2,523		232,368
Nanometrics, Inc.(a)		1,600		48,736
NeoPhotonics Corp.(a)		1,800		16,218
NVE Corp.		326		26,990
ON Semiconductor Corp.(a)		28,007		433,828
PDF Solutions, Inc.(a)		1,600		36,192
Photronics, Inc.(a)		3,900		41,730
Power Integrations, Inc.		1,900		124,925
Rambus, Inc.(a)		6,800		89,352
Rudolph Technologies, Inc.(a)		2,153		48,227
Semtech Corp.(a)		4,132		139,662
Sigma Designs, Inc.(a)		2,200		13,750
Silicon Laboratories, Inc.(a)		2,729		200,718
SunPower Corp.(a)		3,455		21,075
Synaptics, Inc.(a)		2,238		110,803
Teradyne, Inc.		13,368		415,745
Ultra Clean Holdings, Inc.(a)		1,900		32,053
Ultratech, Inc.(a)		1,322		39,158
Veeco Instruments, Inc.(a)		2,501		74,655
Versum Materials, Inc.(a)		6,600		201,960
Xcerra Corp.(a)		3,200		28,448
Xperi Corp.		3,342		113,461
				7,344,681
Software – 4.4%
A10 Networks, Inc.(a)		2,600		23,790
ACI Worldwide, Inc.(a)		7,600		162,564
American Software, Inc. Class A		1,500		15,420
ANSYS, Inc.(a)		5,844		624,548
Aspen Technology, Inc.(a)		5,055		297,841
Atlassian Corp. PLC Class A(a)		1,600		47,920
Barracuda Networks, Inc.(a)		1,300		30,043
Blackbaud, Inc.		3,243		248,641
Blackline, Inc.(a)		600		17,856
Bottomline Technologies de, Inc.(a)		2,600		61,490
BroadSoft, Inc.(a)		1,912		76,862
Cadence Design Systems, Inc.(a)		18,402		577,823
Callidus Software, Inc.(a)		3,903		83,329
CDK Global, Inc.		9,635		626,371
CommVault Systems, Inc.(a)		2,542		129,134
Dell Technologies, Inc. Class V(a)		14,474		927,494
Digimarc Corp.(a)		540		14,580
Ebix, Inc.		1,700		104,125
Ellie Mae, Inc.(a)		2,158		216,383
EnerNOC, Inc.(a)		1,600		9,600
Everbridge, Inc.(a)		500		10,265
Exa Corp.(a)		800		10,160
Fair Isaac Corp.		2,028		261,511
FireEye, Inc.(a)		9,953		125,507
Fortinet, Inc.(a)		9,882		378,975
Gigamon, Inc.(a)		2,100		74,655
Globant SA(a)		1,600		58,240
Glu Mobile, Inc.(a)		6,200		14,074
Guidance Software, Inc.(a)		1,400		8,260
Guidewire Software, Inc.(a)		4,806		270,722
HubSpot, Inc.(a)		1,875		113,531
Imperva, Inc.(a)		1,873		76,887
Jive Software, Inc.(a)		3,450		14,835
Manhattan Associates, Inc.(a)		5,006		260,562
MicroStrategy, Inc. Class A(a)		621		116,624
Mitek Systems, Inc.(a)		1,800		11,970
MobileIron, Inc.(a)		2,804		12,197
Model N, Inc.(a)		1,300		13,585
Monotype Imaging Holdings, Inc.		2,593		52,119
Nuance Communications, Inc.(a)		14,745		255,236
Park City Group, Inc.(a)		800		9,880
Paycom Software, Inc.(a)		2,900		166,779
Paylocity Holding Corp.(a)		1,300		50,219
Pegasystems, Inc.		2,361		103,530
Progress Software Corp.		3,700		107,485
Proofpoint, Inc.(a)		2,650		197,054
PROS Holdings, Inc.(a)		1,500		36,285
PTC, Inc.(a)		7,493		393,757
QAD, Inc. Class A		600		16,710
Qualys, Inc.(a)		1,664		63,066
Rapid7, Inc.(a)		1,200		17,976
RealPage, Inc.(a)		3,884		135,552
RingCentral, Inc. Class A(a)		3,885		109,945
Rosetta Stone, Inc.(a)		1,200		11,700
Rubicon Project, Inc.(a)		2,207		12,999
Sapiens International Corp. NV		1,500		19,320
SecureWorks Corp. Class A(a)		200		1,900
ServiceNow, Inc.(a)		10,473		916,073
Silver Spring Networks, Inc.(a)		2,300		25,967
Splunk, Inc.(a)		8,784		547,155
SS&C Technologies Holdings, Inc.		11,052		391,241
Synchronoss Technologies, Inc.(a)		2,597		63,367

See accompanying notes to schedules of investments.

79

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Software – (continued)
Tableau Software, Inc. Class A(a)		3,685	$	182,592
Take-Two Interactive Software, Inc.(a)		6,450		382,291
Telenav, Inc.(a)		1,952		16,885
TiVo Corp.		7,700		144,375
Tyler Technologies, Inc.(a)		2,219		342,969
Ultimate Software Group, Inc.(a)		1,865		364,067
Varonis Systems, Inc.(a)		690		21,942
VASCO Data Security International, Inc.(a)		1,800		24,300
Verint Systems, Inc.(a)		4,129		179,095
VirnetX Holding Corp.(a)		2,900		6,670
VMware, Inc. Class A(a)		5,483		505,204
Workday, Inc. Class A(a)		7,797		649,334
Workiva, Inc.(a)		1,300		20,345
Zendesk, Inc.(a)		5,287		148,247
Zix Corp.(a)		3,200		15,392
Zynga, Inc. Class A(a)		47,800		136,230
				12,973,627
Specialty Retail – 1.8%
Aaron’s, Inc.		4,338		129,012
Abercrombie & Fitch Co. Class A		4,096		48,865
America’s Car-Mart, Inc.(a)		444		16,184
American Eagle Outfitters, Inc.		11,350		159,241
Asbury Automotive Group, Inc.(a)		1,422		85,462
Ascena Retail Group, Inc.(a)		10,363		44,146
At Home Group, Inc.(a)		500		7,580
Barnes & Noble Education, Inc.(a)		2,400		23,016
Barnes & Noble, Inc.		3,754		34,725
Big 5 Sporting Goods Corp.		1,100		16,610
Boot Barn Holdings, Inc.(a)		800		7,912
Buckle, Inc.		1,684		31,322
Build-A-Bear Workshop, Inc.(a)		800		7,080
Burlington Stores, Inc.(a)		4,735		460,668
Cabela’s, Inc.(a)		3,253		172,767
Caleres, Inc.		2,700		71,334
Camping World Holdings, Inc. Class A		700		22,568
Cato Corp. Class A		1,500		32,940
Chico’s FAS, Inc.		8,600		122,120
Children’s Place, Inc.		1,222		146,701
Citi Trends, Inc.		900		15,300
Conn’s, Inc.(a)		1,243		10,876
Container Store Group, Inc.(a)		1,000		4,230
CST Brands, Inc.		4,883		234,823
Destination XL Group, Inc.(a)		2,200		6,270
Dick’s Sporting Goods, Inc.		5,877		285,975
DSW, Inc. Class A		4,500		93,060
Express, Inc.(a)		4,449		40,530
Finish Line, Inc. Class A		2,500		35,575
Five Below, Inc.(a)		3,554		153,924
Francesca’s Holdings Corp.(a)		2,275		34,921
GameStop Corp. Class A		6,600		148,830
Genesco, Inc.(a)		1,305		72,362
GNC Holdings, Inc. Class A		4,103		30,198
Group 1 Automotive, Inc.		1,352		100,156
Guess?, Inc.		3,700		41,255
Haverty Furniture Cos., Inc.		1,100		26,785
Hibbett Sports, Inc.(a)		1,434		42,303
Kirkland’s, Inc.(a)		900		11,160
Lithia Motors, Inc. Class A		1,585		135,755
Lumber Liquidators Holdings, Inc.(a)		1,576		33,080
MarineMax, Inc.(a)		1,478		31,999
Michaels Cos., Inc.(a)		6,291		140,856
Monro Muffler Brake, Inc.		1,998		104,096
Murphy USA, Inc.(a)		2,394		175,768
Office Depot, Inc.		36,200		168,873
Party City Holdco, Inc.(a)		1,600		22,480
Penske Automotive Group, Inc.		2,477		115,948
Pier 1 Imports, Inc.		4,900		35,084
Rent-A-Center, Inc.		3,100		27,497
RH(a)		2,629		121,618
Sally Beauty Holdings, Inc.(a)		9,785		200,005
Sears Hometown and Outlet Stores, Inc.(a)		400		1,560
Select Comfort Corp.(a)		2,776		68,817
Shoe Carnival, Inc.		800		19,656
Sonic Automotive, Inc. Class A		1,700		34,085
Sportsman’s Warehouse Holdings, Inc.(a)		1,500		7,170
Stage Stores, Inc.		1,500		3,885
Stein Mart, Inc.		1,853		5,578
Tailored Brands, Inc.		3,152		47,091
Tile Shop Holdings, Inc.		1,919		36,941
Tilly’s, Inc. Class A		700		6,314
Urban Outfitters, Inc.(a)		6,414		152,397
Vitamin Shoppe, Inc.(a)		1,500		30,225
West Marine, Inc.(a)		1,082		10,322
Williams-Sonoma, Inc.		5,948		318,932
Winmark Corp.		174		19,662
Zumiez, Inc.(a)		1,100		20,130
				5,124,610
Technology Hardware, Storage & Peripherals – 0.4%
3D Systems Corp.(a)		7,300		109,208
Avid Technology, Inc.(a)		1,900		8,854
CPI Card Group, Inc.		1,269		5,330
Cray, Inc.(a)		2,766		60,575
Diebold Nixdorf, Inc.		4,551		139,716
Eastman Kodak Co.(a)		1,000		11,500
Electronics For Imaging, Inc.(a)		3,105		151,617
Immersion Corp.(a)		1,735		15,025
NCR Corp.(a)		8,267		377,637
Nimble Storage, Inc.(a)		3,800		47,500
Pure Storage, Inc. Class A(a)		4,100		40,303
Stratasys, Ltd.(a)		3,182		65,199
Super Micro Computer, Inc.(a)		2,372		60,130
USA Technologies, Inc.(a)		2,200		9,350
				1,101,944
Textiles, Apparel & Luxury Goods – 0.7%
Carter’s, Inc.		3,339		299,842
Columbia Sportswear Co.		1,787		104,986
Crocs, Inc.(a)		4,400		31,108
Culp, Inc.		600		18,720
Deckers Outdoor Corp.(a)		2,120		126,628
Delta Apparel, Inc.(a)		400		7,052
Fossil Group, Inc.(a)		2,500		43,625

See accompanying notes to schedules of investments.

80

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Textiles, Apparel & Luxury Goods – (continued)
G-III Apparel Group, Ltd.(a)		2,881	$	63,065
Iconix Brand Group, Inc.(a)		2,600		19,552
Kate Spade & Co.(a)		8,500		197,455
lululemon athletica, Inc.(a)		6,432		333,628
Movado Group, Inc.		900		22,455
Oxford Industries, Inc.		930		53,252
Perry Ellis International, Inc.(a)		800		17,184
Sequential Brands Group, Inc.(a)		2,310		8,986
Skechers U.S.A., Inc. Class A(a)		8,647		237,360
Steven Madden, Ltd.(a)		4,000		154,200
Superior Uniform Group, Inc.		500		9,300
Unifi, Inc.(a)		900		25,551
Vera Bradley, Inc.(a)		1,200		11,172
Vince Holding Corp.(a)		1,300		2,015
Wolverine World Wide, Inc.		6,400		159,808
				1,946,944
Thrifts & Mortgage Finance – 1.2%
Astoria Financial Corp.		6,100		125,111
Bank Mutual Corp.		2,400		22,560
BankFinancial Corp.		900		13,068
Bear State Financial, Inc.		1,100		10,340
Beneficial Bancorp, Inc.		4,400		70,400
BofI Holding, Inc.(a)		3,900		101,907
BSB Bancorp, Inc.(a)		479		13,532
Capitol Federal Financial, Inc.		8,300		121,429
Charter Financial Corp.		800		15,736
Clifton Bancorp, Inc.		1,320		21,371
Dime Community Bancshares, Inc.		1,900		38,570
ESSA Bancorp, Inc.		500		7,290
Essent Group, Ltd.(a)		4,800		173,616
EverBank Financial Corp.		6,700		130,516
Federal Agricultural Mortgage Corp. Class C		500		28,785
First Defiance Financial Corp.		548		27,131
Flagstar Bancorp, Inc.(a)		1,300		36,647
Greene County Bancorp, Inc.		200		4,670
Hingham Institution for Savings		81		14,325
Home Bancorp, Inc.		300		10,125
HomeStreet, Inc.(a)		1,874		52,378
Impac Mortgage Holdings, Inc.(a)		589		7,339
Kearny Financial Corp.		5,500		82,775
LendingTree, Inc.(a)		410		51,394
Meridian Bancorp, Inc.		3,400		62,220
Meta Financial Group, Inc.		581		51,419
MGIC Investment Corp.(a)		22,400		226,912
Nationstar Mortgage Holdings, Inc.(a)		1,900		29,944
New York Community Bancorp, Inc.		31,823		444,567
NMI Holdings, Inc. Class A(a)		3,000		34,200
Northfield Bancorp, Inc.		3,000		54,060
Northwest Bancshares, Inc.		6,300		106,092
OceanFirst Financial Corp.		1,800		50,715
Ocwen Financial Corp.(a)		6,000		32,820
Oritani Financial Corp.		2,300		39,100
PennyMac Financial Services, Inc. Class A(a)		800		13,640
PHH Corp.(a)		3,200		40,736
Provident Bancorp, Inc.(a)		200		4,190
Provident Financial Holdings, Inc.		400		7,460
Provident Financial Services, Inc.		4,500		116,325
Radian Group, Inc.		14,200		255,032
SI Financial Group, Inc.		700		9,835
Southern Missouri Bancorp, Inc.		400		14,208
Territorial Bancorp, Inc.		455		14,182
TFS Financial Corp.		4,029		66,962
TrustCo Bank Corp. NY		5,500		43,175
United Community Financial Corp.		2,800		23,352
United Financial Bancorp, Inc.		3,600		61,236
Walker & Dunlop, Inc.(a)		1,800		75,042
Walter Investment Management Corp.(a)		1,100		1,188
Washington Federal, Inc.		6,200		205,220
Waterstone Financial, Inc.		1,500		27,375
Western New England Bancorp, Inc.		1,500		15,750
WSFS Financial Corp.		1,900		87,305
				3,395,277
Tobacco – 0.1%
Alliance One International, Inc.(a)		500		6,425
Turning Point Brands, Inc.(a)		400		6,240
Universal Corp.		1,441		101,951
Vector Group, Ltd.		6,350		132,080
				246,696
Trading Companies & Distributors – 1.1%
Air Lease Corp.		6,400		248,000
Aircastle, Ltd.		3,300		79,629
Applied Industrial Technologies, Inc.		2,461		152,213
Beacon Roofing Supply, Inc.(a)		3,849		189,217
BMC Stock Holdings, Inc.(a)		3,525		79,665
CAI International, Inc.(a)		1,400		22,036
DXP Enterprises, Inc.(a)		900		34,083
GATX Corp.		2,685		163,677
GMS, Inc.(a)		400		14,016
H&E Equipment Services, Inc.		1,900		46,588
HD Supply Holdings, Inc.(a)		13,430		552,309
Herc Holdings, Inc.(a)		1,538		75,193
Kaman Corp.		1,799		86,586
Lawson Products, Inc.(a)		400		8,980
MRC Global, Inc.(a)		6,400		117,312
MSC Industrial Direct Co., Inc. Class A		2,958		303,964
Neff Corp. Class A(a)		600		11,670
NOW, Inc.(a)		7,100		120,416
Rush Enterprises, Inc. Class A(a)		1,800		59,544
Rush Enterprises, Inc. Class B(a)		400		12,472
SiteOne Landscape Supply, Inc.(a)		700		33,887
Textainer Group Holdings, Ltd.		1,400		21,420
Titan Machinery, Inc.(a)		1,100		16,874
Triton International, Ltd.		2,600		67,054
Univar, Inc.(a)		2,901		88,945
Veritiv Corp.(a)		491		25,434
Watsco, Inc.		1,790		256,292
WESCO International, Inc.(a)		3,328		231,462
Willis Lease Finance Corp.(a)		200		4,470
				3,123,408

See accompanying notes to schedules of investments.

81

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Transportation Infrastructure – 0.2%
Macquarie Infrastructure Corp.		5,055	$	407,332
Wesco Aircraft Holdings, Inc.(a)		3,300		37,620
				444,952
Water Utilities – 0.3%
American States Water Co.		2,446		108,358
Aqua America, Inc.		11,815		379,852
AquaVenture Holdings, Ltd.(a)		400		6,828
Artesian Resources Corp. Class A		451		14,684
California Water Service Group		3,176		113,860
Connecticut Water Service, Inc.		700		37,205
Consolidated Water Co., Ltd.		900		10,485
Global Water Resources, Inc.		300		2,610
Middlesex Water Co.		1,000		36,950
SJW Group		1,000		48,220
York Water Co.		800		28,040
				787,092
Wireless Telecommunication Services – 0.7%
Boingo Wireless, Inc.(a)		2,100		27,279
NII Holdings, Inc.(a)		3,200		4,160
Shenandoah Telecommunications Co.		3,550		99,578
Spok Holdings, Inc.		1,200		22,800
Sprint Corp.(a)		50,874		441,586
T-Mobile US, Inc.(a)		18,883		1,219,653
Telephone & Data Systems, Inc.		6,200		164,362
United States Cellular Corp.(a)		800		29,864
				2,009,282
TOTAL COMMON STOCKS (Cost $264,690,070)				282,123,555
	Principal Amount
CORPORATE BONDS & NOTES – 0.0%(d)
Metal Fabricate & Hardware – 0.0%(d)
Mueller Industries, Inc. 6.00%, 3/1/2027 (Cost $18,000)	$	18,000		17,865
Security Description	Shares		Value
RIGHTS – 0.0%(d)
Biotechnology – 0.0%(d)
Dyax Corp. (CVR)(a)(e)		1,009		1,120
Tobira Therapeutics, Inc. (CVR)(a)(e)		200		2,748
				3,868
Media – 0.0%(d)
Media General, Inc. (CVR)(a)(e)		6,500		12,350
TOTAL RIGHTS (Cost $3,868)				16,218
SHORT-TERM INVESTMENT – 1.8%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(f)(g) (Cost $5,226,347)		5,226,347		5,226,347
TOTAL INVESTMENTS – 98.1% (Cost $269,938,285)				287,383,985
Other Assets in Excess of Liabilities – 1.9%				5,707,937
NET ASSETS – 100.0%			$	293,091,922

^(a)  Non-income producing security.

^(b)  Reflects separate holdings of the issuer’s common stock traded on different securities exchanges.

^(c)  Fair valued as determined in good faith by the Trust’s Oversight Committee in accordance with policy and procedures approved by the Board of Trustees. Security value is determined based on Level 3 inputs. As of March 31, 2017, total aggregate fair value of the security is $0, representing 0.0% of the Fund’s net assets.

^(d) Amount is less than 0.05% of net assets.

^(e)  Fair valued as determined in good faith by the Trust’s Oversight Committee in accordance with policy and procedures approved by the Board of Trustees. As of March 31, 2017, total aggregate fair value of the securities is $16,218, representing 0.0% of the Fund’s net assets.

^(f)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(g)  The rate shown is the annualized seven-day yield at March 31, 2017.

CVR	Contingent Value Rights
NVDR	Non Voting Depositary Receipt
REIT	Real Estate Investment Trust

At March 31, 2017, open futures contracts purchased were as follows:

Futures Contracts	Expiration Date		Number of Contracts		Notional Value		Unrealized Appreciation
E-mini S&P MidCap 400 Index (long)		06/16/2017		18	$	3,092,760	$	11,004
Russell 2000 Index Mini (long)		06/16/2017		25		1,730,500		25,736
Total unrealized appreciation on open futures contracts purchased							$	36,740

See accompanying notes to schedules of investments.

82

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs			Total
Assets:
Investments:
Common Stocks
Aerospace & Defense	$	4,761,580	$	–	$	–		$	4,761,580
Air Freight & Logistics		721,493		–		–			721,493
Airlines		1,355,215		–		–			1,355,215
Auto Components		3,270,852		–		–			3,270,852
Automobiles		2,672,882		–		–			2,672,882
Banks		20,658,402		–		–			20,658,402
Beverages		309,872		–		–			309,872
Biotechnology		10,299,391		–		–			10,299,391
Building Products		3,250,794		–		–			3,250,794
Capital Markets		4,415,348		–		–			4,415,348
Chemicals		8,112,942		–		–			8,112,942
Commercial Services & Supplies		4,487,440		–		–			4,487,440
Communications Equipment		5,601,352		–		–			5,601,352
Construction & Engineering		2,155,039		–		–			2,155,039
Construction Materials		678,071		–		–			678,071
Consumer Finance		1,897,877		–		–			1,897,877
Containers & Packaging		3,254,868		–		–			3,254,868
Distributors		423,076		–		–			423,076
Diversified Consumer Services		2,129,777		–		–			2,129,777
Diversified Financial Services		2,170,953		–		–			2,170,953
Diversified Telecommunication Services		1,321,718		–		–			1,321,718
Electric Utilities		3,135,520		–		–			3,135,520
Electrical Equipment		1,482,790		–		–			1,482,790
Electronic Equipment, Instruments & Components		8,203,416		–		–			8,203,416
Energy Equipment & Services		3,323,516		–		–			3,323,516
Equity Real Estate Investment Trusts (REITs)		1,479,872		–		–			1,479,872
Food & Staples Retailing		1,546,443		–		–			1,546,443
Food Products		5,850,773		–		–			5,850,773
Gas Utilities		2,983,431		–		–			2,983,431
Health Care Equipment & Supplies		7,598,941		–		–			7,598,941
Health Care Providers & Services		4,336,474		–		–			4,336,474
Health Care Technology		1,459,839		–		–			1,459,839
Hotels, Restaurants & Leisure		11,510,101		–		–			11,510,101
Household Durables		3,056,879		–		–			3,056,879
Household Products		843,864		–		–			843,864
Independent Power Producers & Energy Traders		868,889		–		–			868,889
Industrial Conglomerates		518,802		–		–			518,802
Insurance		12,167,500		–		–			12,167,500
Internet & Catalog Retail		1,784,560		–		–			1,784,560
Internet Software & Services		4,975,897		–		–			4,975,897
IT Services		9,493,811		–		–			9,493,811
Leisure Equipment & Products		1,134,124		–		–			1,134,124
Life Sciences Tools & Services		3,140,424		–		–			3,140,424
Machinery		10,732,973		–		–			10,732,973
Marine		376,876		–		–			376,876
Media		6,909,036		–		–			6,909,036
Metals & Mining		4,041,502		–		0	(a)		4,041,502
Mortgage Real Estate Investment		443,408		–		–			443,408
Multi-Utilities		1,289,446		–		–			1,289,446
Multiline Retail		414,500		–		–			414,500
Oil, Gas & Consumable Fuels		8,554,393		–		–			8,554,393
Paper & Forest Products		909,627		–		–			909,627
Personal Products		1,078,671		–		–			1,078,671

See accompanying notes to schedules of investments.

83

State Street Institutional Investment Trust

State Street Small/Mid Cap Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Pharmaceuticals	$	2,566,206	$	–	$	–	$	2,566,206
Professional Services		2,326,034		–		–		2,326,034
Real Estate Investment Trusts (REITs)		25,699,762		–		–		25,699,762
Real Estate Management & Development		1,543,539		–		–		1,543,539
Road & Rail		1,894,261		–		–		1,894,261
Semiconductors & Semiconductor Equipment		7,344,681		–		–		7,344,681
Software		12,973,627		–		–		12,973,627
Specialty Retail		5,124,610		–		–		5,124,610
Technology Hardware, Storage & Peripherals		1,101,944		–		–		1,101,944
Textiles, Apparel & Luxury Goods		1,946,944		–		–		1,946,944
Thrifts & Mortgage Finance		3,395,277		–		–		3,395,277
Tobacco		246,696		–		–		246,696
Trading Companies & Distributors		3,123,408		–		–		3,123,408
Transportation Infrastructure		444,952		–		–		444,952
Water Utilities		787,092		–		–		787,092
Wireless Telecommunication Services		2,009,282		–		–		2,009,282
Corporate Bonds & Notes
Metal Fabricate & Hardware		–		17,865		–		17,865
Rights
Biotechnology		–		3,868		–		3,868
Media		–		12,350		–		12,350
Short-Term Investment		5,226,347		–		–		5,226,347
Total Investments	$	287,349,902	$	34,083	$	0	$	287,383,985
Other Financial Instruments:
Futures Contracts(b)		36,740		–		–		36,740
Total Investments And Other Financial Instruments	$	287,386,642	$	34,083	$	0	$	287,420,725

^(a)  Fund held a Level 3 security that was valued at $0 at March 31, 2017.

^(b)  Futures Contracts are valued at unrealized appreciation (depreciation).

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income
State Street Institutional U.S. Government Money Market Fund, Premier Class		3,020,616	$	3,020,616		136,832,746		134,627,015		5,226,347	$	5,226,347	$	9,408
TOTAL			$	3,020,616							$	5,226,347	$	9,408

See accompanying notes to schedules of investments.

84

State Street Institutional Investment Trust

State Street Disciplined U.S. Equity Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – 99.7%
Aerospace & Defense – 5.0%
General Dynamics Corp.		285	$	53,352
Huntington Ingalls Industries, Inc.		189		37,845
Northrop Grumman Corp.		140		33,298
Spirit AeroSystems Holdings, Inc. Class A		886		51,317
				175,812
Airlines – 1.0%
Delta Air Lines, Inc.		764		35,113
Banks – 4.3%
Bank of America Corp.		1,402		33,073
Citigroup, Inc.		546		32,662
JPMorgan Chase & Co.		681		59,819
US Bancorp		503		25,904
				151,458
Beverages – 1.2%
PepsiCo, Inc.		383		42,842
Biotechnology – 1.1%
Amgen, Inc.		230		37,736
Capital Markets – 0.7%
Morgan Stanley		589		25,233
Commercial Services & Supplies – 3.4%
KAR Auction Services, Inc.		750		32,753
Republic Services, Inc.		563		35,362
Waste Management, Inc.		699		50,971
				119,086
Communications Equipment – 2.3%
Cisco Systems, Inc.		1,587		53,641
Motorola Solutions, Inc.		316		27,245
				80,886
Consumer Finance – 2.0%
Ally Financial, Inc.		1,793		36,452
American Express Co.		448		35,441
				71,893
Diversified Telecommunication Services – 1.0%
AT&T, Inc.		834		34,653
Electric Utilities – 10.8%
American Electric Power Co., Inc.		617		41,419
Edison International		618		49,199
Entergy Corp.		528		40,107
Exelon Corp.		1,325		47,673
FirstEnergy Corp.		1,125		35,798
PG&E Corp.		704		46,717
Pinnacle West Capital Corp.		574		47,860
PPL Corp.		1,059		39,596
Southern Co.		701		34,896
				383,265
Electrical Equipment – 1.2%
Eaton Corp. PLC		581		43,081
Electronic Equipment, Instruments & Components – 2.0%
Corning, Inc.		1,083		29,241
TE Connectivity, Ltd.		554		41,301
				70,542
Food & Staples Retailing – 1.5%
Wal-Mart Stores, Inc.		741		53,411
Food Products – 5.4%
Archer-Daniels-Midland Co.		1,140		52,485
Bunge, Ltd.		610		48,349
Ingredion, Inc.		409		49,256
Tyson Foods, Inc. Class A		696		42,950
				193,040
Health Care Equipment & Supplies – 3.9%
Baxter International, Inc.		1,030		53,416
C.R. Bard, Inc.		166		41,257
Hologic, Inc.(a)		1,069		45,486
				140,159
Health Care Providers & Services – 5.5%
Cardinal Health, Inc.		437		35,637
Express Scripts Holding Co.(a)		489		32,230
HCA Holdings, Inc.(a)		518		46,097
McKesson Corp.		120		17,791
Quest Diagnostics, Inc.		298		29,261
UnitedHealth Group, Inc.		209		34,278
				195,294
Hotels, Restaurants & Leisure – 2.5%
Carnival Corp.		717		42,238
Darden Restaurants, Inc.		570		47,692
				89,930
Household Products – 1.6%
Procter & Gamble Co.		621		55,797
Industrial Conglomerates – 1.0%
3M Co.		185		35,396
Insurance – 5.3%
Allstate Corp.		712		58,021
Everest Re Group, Ltd.		214		50,035
Principal Financial Group, Inc.		289		18,239
Prudential Financial, Inc.		247		26,350
Travelers Cos., Inc.		308		37,126
				189,771
Internet Software & Services – 1.6%
eBay, Inc.(a)		1,721		57,774
It Services – 2.4%
Accenture PLC Class A		271		32,488
International Business Machines Corp.		296		51,545
				84,033
Life Sciences Tools & Services – 2.4%
Agilent Technologies, Inc.		1,036		54,773
Thermo Fisher Scientific, Inc.		209		32,103
				86,876
Media – 2.6%
Comcast Corp. Class A		1,336		50,220
Time Warner, Inc.		434		42,406
				92,626
Metals & Mining – 1.0%
Reliance Steel & Aluminum Co.		435		34,809

See accompanying notes to schedules of investments.

85

State Street Institutional Investment Trust

State Street Disciplined U.S. Equity Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Multi-utilities – 3.6%
CenterPoint Energy, Inc.		1,605	$	44,250
DTE Energy Co.		426		43,499
Public Service Enterprise Group, Inc.		926		41,068
				128,817
Oil, Gas & Consumable Fuels – 0.8%
Valero Energy Corp.		441		29,234
Pharmaceuticals – 5.1%
Eli Lilly & Co.		511		42,980
Johnson & Johnson		448		55,799
Merck & Co., Inc.		712		45,241
Pfizer, Inc.		1,040		35,578
				179,598
Real Estate Investment Trusts (reits) – 3.1%
AGNC Investment Corp. REIT		1,646		32,739
Annaly Capital Management, Inc.		4,092		45,462
Gaming and Leisure Properties, Inc.		940		31,415
				109,616
Semiconductors & Semiconductor Equipment – 3.4%
Intel Corp.		1,224		44,150
Texas Instruments, Inc.		713		57,439
Xilinx, Inc.		345		19,972
				121,561
Software – 2.3%
Microsoft Corp.		704		46,366
Symantec Corp.		1,153		35,374
				81,740
Specialty Retail – 3.2%
Best Buy Co., Inc.		642		31,554
Foot Locker, Inc.		551		41,220
Lowe’s Cos., Inc.		512		42,092
				114,866
Technology Hardware, Storage & Peripherals – 2.8%
Apple, Inc.		499		71,687
HP, Inc.		1,613		28,840
				100,527
Tobacco – 2.7%
Altria Group, Inc.		820		58,564
Reynolds American, Inc.		580		36,552
				95,116
TOTAL COMMON STOCKS (Cost $3,095,100)				3,541,591
SHORT-TERM INVESTMENT – 1.4%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(b)(c) (Cost $50,243)		50,243		50,243
TOTAL INVESTMENTS – 101.1% (Cost $3,145,343)				3,591,834
Liabilities In Excess of Other Assets – (1.1)%				(39,439	)
NET ASSETS – 100.0%			$	3,552,395

^(a)  Non-income producing security.

^(b)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(c)  The rate shown is the annualized seven-day yield at March 31, 2017.

REIT Real Estate Investment Trust

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Common Stocks
Aerospace & Defense	$	175,812	$	–	$	–	$	175,812
Airlines		35,113		–		–		35,113
Banks		151,458		–		–		151,458
Beverages		42,842		–		–		42,842
Biotechnology		37,736		–		–		37,736
Capital Markets		25,233		–		–		25,233
Commercial Services & Supplies		119,086		–		–		119,086
Communications Equipment		80,886		–		–		80,886
Consumer Finance		71,893		–		–		71,893
Diversified Telecommunication Services		34,653		–		–		34,653
Electric Utilities		383,265		–		–		383,265
Electrical Equipment		43,081		–		–		43,081

See accompanying notes to schedules of investments.

86

State Street Institutional Investment Trust

State Street Disciplined U.S. Equity Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Electronic Equipment, Instruments & Components	$	70,542	$	–	$	–	$	70,542
Food & Staples Retailing		53,411		–		–		53,411
Food Products		193,040		–		–		193,040
Health Care Equipment & Supplies		140,159		–		–		140,159
Health Care Providers & Services		195,294		–		–		195,294
Hotels, Restaurants & Leisure		89,930		–		–		89,930
Household Products		55,797		–		–		55,797
Industrial Conglomerates		35,396		–		–		35,396
Insurance		189,771		–		–		189,771
Internet Software & Services		57,774		–		–		57,774
IT Services		84,033		–		–		84,033
Life Sciences Tools & Services		86,876		–		–		86,876
Media		92,626		–		–		92,626
Metals & Mining		34,809		–		–		34,809
Multi-Utilities		128,817		–		–		128,817
Oil, Gas & Consumable Fuels		29,234		–		–		29,234
Pharmaceuticals		179,598		–		–		179,598
Real Estate Investment Trusts (REITs)		109,616		–		–		109,616
Semiconductors & Semiconductor Equipment		121,561		–		–		121,561
Software		81,740		–		–		81,740
Specialty Retail		114,866		–		–		114,866
Technology Hardware, Storage & Peripherals		100,527		–		–		100,527
Tobacco		95,116		–		–		95,116
Short-Term Investment		50,243		–		–		50,243
Total Investments	$	3,591,834	$	–	$	–	$	3,591,834

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income
State Street Institutional U.S. Government Money Market Fund, Premier Class		20,233	$	20,233		83,011		53,001		50,243	$	50,243	$	34
TOTAL			$	20,233							$	50,243	$	34

See accompanying notes to schedules of investments.

87

State Street Institutional Investment Trust

State Street Disciplined International Equity Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – 100.0%
Australia – 7.3%
AGL Energy, Ltd.		1,913	$	38,483
CIMIC Group, Ltd.		1,241		34,015
Cochlear, Ltd.		337		34,765
Mirvac Group REIT		15,771		26,348
Qantas Airways, Ltd.		13,342		39,592
Stockland REIT		7,407		26,218
Telstra Corp., Ltd.		9,913		35,239
				234,660
Belgium – 2.1%
Colruyt SA		693		34,110
Proximus SADP		1,114		35,047
				69,157
Denmark – 1.2%
Danske Bank A/S		1,149		39,249
Finland – 2.5%
Orion Oyj Class B		760		39,724
Stora Enso Oyj Class R		3,503		41,513
				81,237
France – 6.2%
Eutelsat Communications SA		1,178		26,370
Gecina SA REIT		201		27,345
Orange SA		2,190		34,116
Peugeot SA(a)		1,240		25,033
Sanofi		493		44,619
Vinci SA		549		43,628
				201,111
Germany – 7.5%
Deutsche Post AG		1,259		43,231
Fresenius Medical Care AG & Co. KGaA		445		37,624
Fresenius SE & Co. KGaA		538		43,346
METRO AG		1,312		42,069
Muenchener Rueckversicherungs-Gesellschaft AG in Muenchen		138		27,070
OSRAM Licht AG		751		47,190
				240,530
Hong Kong – 11.6%
AIA Group, Ltd.		5,000		31,526
BOC Hong Kong Holdings, Ltd.		6,500		26,556
CLP Holdings, Ltd.		3,500		36,592
Hang Seng Bank, Ltd.		2,200		44,614
Jardine Matheson Holdings, Ltd.		400		25,700
Link REIT		3,500		24,522
New World Development Co., Ltd.		24,000		29,523
Sun Hung Kai Properties, Ltd.		2,000		29,390
Swire Pacific, Ltd. Class A		4,000		39,941
WH Group, Ltd.(b)		50,500		43,537
Wharf Holdings, Ltd.		5,000		42,913
				374,814
Japan – 28.4%
Asahi Glass Co., Ltd.		5,000		40,474
Astellas Pharma, Inc.		2,700		35,522
Bridgestone Corp.		1,100		44,452
Canon, Inc.		1,300		40,494
Central Japan Railway Co.		200		32,559
Chubu Electric Power Co., Inc.		2,900		38,804
Daiichi Sankyo Co., Ltd.		1,700		38,247
Daito Trust Construction Co., Ltd.		200		27,452
Hoya Corp.		1,000		48,066
Japan Airlines Co., Ltd.		300		9,493
Konami Holdings Corp.		900		38,163
Kuraray Co., Ltd.		1,600		24,238
Marubeni Corp.		6,200		38,141
Mitsubishi Chemical Holdings Corp.		3,200		24,737
Mitsubishi Tanabe Pharma Corp.		2,100		43,685
Mitsui Chemicals, Inc.		5,000		24,679
Nippon Telegraph & Telephone Corp.		900		38,381
NTT DOCOMO, Inc.		1,600		37,225
Seiko Epson Corp.		1,400		29,450
Shionogi & Co., Ltd.		700		36,109
Sumitomo Chemical Co., Ltd.		7,000		39,074
Sumitomo Electric Industries, Ltd.		2,300		38,103
Suzuken Co., Ltd.		1,200		39,307
Suzuki Motor Corp.		1,000		41,479
Taisho Pharmaceutical Holdings Co., Ltd.		400		32,451
Tokyu Corp.		3,000		21,215
TonenGeneral Sekiyu KK(a)		1,000		12,511
				914,511
Netherlands – 1.1%
Koninklijke Ahold Delhaize NV		1,609		34,521
Norway – 2.5%
Orkla ASA		4,606		41,239
Telenor ASA		2,336		38,866
				80,105
Singapore – 4.2%
CapitaLand Commercial Trust		9,800		10,836
ComfortDelGro Corp., Ltd.		17,500		32,062
Singapore Airlines, Ltd.		4,700		33,872
United Overseas Bank, Ltd.		1,500		23,735
Wilmar International, Ltd.		14,000		35,368
				135,873
South Africa – 1.4%
Mondi PLC		1,925		46,385
Spain – 4.0%
ACS Actividades de Construccion y Servicios SA		1,268		43,256
Aena SA(b)		279		44,253
Endesa SA		1,796		42,318
				129,827
Sweden – 3.6%
Boliden AB		609		18,212
Nordea Bank AB		2,159		24,738
Skanska AB Class B		1,579		37,316
Swedish Match AB		1,085		35,424
				115,690
Switzerland – 9.7%
ABB, Ltd.		828		19,382
Actelion, Ltd.(a)		23		6,484
Adecco Group AG		641		45,564
Lonza Group AG(a)		227		42,953
Novartis AG		404		30,009

See accompanying notes to schedules of investments.

88

State Street Institutional Investment Trust

State Street Disciplined International Equity Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Switzerland – (continued)
Roche Holding AG		150	$	38,333
Sika AG		8		48,034
Sonova Holding AG		320		44,406
Swisscom AG		78		36,010
				311,175
United Kingdom – 6.7%
Centrica PLC		5,351		14,520
Direct Line Insurance Group PLC		7,160		31,103
GlaxoSmithKline PLC		1,848		38,348
Kingfisher PLC		6,474		26,399
Lloyds Banking Group PLC		18,546		15,380
National Grid PLC		1,409		17,857
Smith & Nephew PLC		1,877		28,541
Wm Morrison Supermarkets PLC		14,697		44,107
				216,255
TOTAL COMMON STOCKS (Cost $3,005,701)				3,225,100
SHORT-TERM INVESTMENT – 0.7%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(c)(d)
(Cost $23,879)		23,879		23,879
TOTAL INVESTMENTS – 100.7% (Cost $3,029,580)				3,248,979
Liabilities In Excess of Other Assets – (0.7)%				(24,184	)
NET ASSETS – 100.0%			$	3,224,795

^(a)  Non-income producing security.

^(b)  Securities purchased pursuant to Rule 144A of the Securities Act of 1933. These securities, which represent 2.7% of net assets as of March 31, 2017, are considered liquid and may be resold in transactions exempt from registration, normally to qualified institutional buyers.

^(c)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(d)  The rate shown is the annualized seven-day yield at March 31, 2017.

REIT Real Estate Investment Trust

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Common Stocks
Australia	$	234,660	$	–	$	–	$	234,660
Belgium		69,157		–		–		69,157
Denmark		39,249		–		–		39,249
Finland		81,237		–		–		81,237
France		201,111		–		–		201,111
Germany		240,530		–		–		240,530
Hong Kong		374,814		–		–		374,814
Japan		902,000		12,511		–		914,511
Netherlands		34,521		–		–		34,521
Norway		80,105		–		–		80,105
Singapore		135,873		–		–		135,873
South Africa		46,385		–		–		46,385
Spain		129,827		–		–		129,827
Sweden		115,690		–		–		115,690
Switzerland		311,175		–		–		311,175
United Kingdom		216,255		–		–		216,255
Short-Term Investment		23,879		–		–		23,879
Total Investments	$	3,236,468	$	12,511	$	–	$	3,248,979

See accompanying notes to schedules of investments.

89

State Street Institutional Investment Trust

State Street Disciplined International Equity Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income
State Street Institutional U.S. Government Money Market Fund, Premier Class		–	$	–		110,131		86,252		23,879	$	23,879	$	21
TOTAL			$	–							$	23,879	$	21

See accompanying notes to schedules of investments.

90

State Street Disciplined Global Equity Fund is a feeder fund that invests substantially all of its investable assets in a master fund, the State Street Disciplined Global Equity Portfolio. The portfolio of investments for the State Street Disciplined Global Equity Portfolio follows.

SSGA Active Trust

State Street Disciplined Global Equity Portfolio

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – 98.5%
Australia – 1.3%
Qantas Airways, Ltd.		6,574	$	19,508
Telstra Corp., Ltd.		8,632		30,686
				50,194
Canada – 3.4%
BCE, Inc.		761		33,598
Metro, Inc.		802		24,565
Shaw Communications, Inc. Class B		1,757		36,322
TELUS Corp.		1,156		37,419
				131,904
Denmark – 1.4%
Danske Bank A/S		548		18,719
Vestas Wind Systems A/S		419		34,170
				52,889
France – 2.3%
Peugeot SA(a)		1,992		40,214
Sanofi		544		49,235
				89,449
Germany – 2.8%
Fresenius SE & Co. KGaA		280		22,559
METRO AG		1,377		44,154
Muenchener Rueckversicherungs-Gesellschaft AG in Muenchen		79		15,496
RWE AG(a)		1,673		27,798
				110,007
Hong Kong – 7.2%
CK Hutchison Holdings, Ltd.		1,500		18,452
CLP Holdings, Ltd.		4,500		47,047
Hang Seng Bank, Ltd.		2,100		42,586
Jardine Matheson Holdings, Ltd.		400		25,700
Link REIT		6,500		45,541
Power Assets Holdings, Ltd.		3,000		25,864
Sun Hung Kai Properties, Ltd.		2,000		29,390
WH Group, Ltd.(b)		57,000		49,141
				283,721
Italy – 1.1%
Enel SpA		9,520		44,944
Japan – 12.3%
Asahi Glass Co., Ltd.		3,000		24,284
Astellas Pharma, Inc.		2,500		32,890
Bridgestone Corp.		700		28,288
Central Japan Railway Co.		300		48,838
Daiichi Sankyo Co., Ltd.		1,500		33,748
Hoya Corp.		500		24,033
Kirin Holdings Co., Ltd.		2,100		39,586
Marubeni Corp.		5,300		32,605
Mitsubishi Materials Corp.		600		18,146
Nippon Telegraph & Telephone Corp.		1,000		42,645
Sekisui Chemical Co., Ltd.		2,100		35,261
Sumitomo Rubber Industries, Ltd.		1,600		27,238
Suzuki Motor Corp.		1,200		49,775
Toyota Motor Corp.		800		43,378
				480,715
Netherlands – 1.2%
Koninklijke Ahold Delhaize NV		2,135		45,807
New Zealand – 0.9%
Spark New Zealand, Ltd.		14,782		36,167
Norway – 0.8%
Norsk Hydro ASA		5,426		31,499
Singapore – 1.1%
Ascendas REIT		6,500		11,723
Singapore Airlines, Ltd.		1,900		13,693
UOL Group, Ltd.		3,700		18,456
				43,872
Spain – 0.7%
ACS Actividades de Construccion y Servicios SA		791		26,984
Sweden – 0.9%
Swedish Match AB		1,133		36,991
Switzerland – 2.9%
Sonova Holding AG		246		34,137
Swisscom AG		78		36,009
TE Connectivity, Ltd.		571		42,568
				112,714
United Kingdom – 0.9%
Direct Line Insurance Group PLC		8,421		36,581
United States – 57.3%
Agilent Technologies, Inc.		875		46,261
AGNC Investment Corp. REIT		1,953		38,845
Allstate Corp.		556		45,308
Ally Financial, Inc.		1,496		30,414
Altria Group, Inc.		362		25,854
Ameren Corp.		768		41,925
American Electric Power Co., Inc.		520		34,908
American Express Co.		471		37,261
Annaly Capital Management, Inc.		3,380		37,552
Anthem, Inc.		235		38,864
Archer-Daniels-Midland Co.		714		32,873
Avery Dennison Corp.		363		29,258
Axis Capital Holdings, Ltd.		669		44,843
Baxter International, Inc.		832		43,148
C.R. Bard, Inc.		196		48,714
Cardinal Health, Inc.		391		31,886
CenterPoint Energy, Inc.		1,662		45,821
Cintas Corp.		366		46,314
Cisco Systems, Inc.		834		28,189
Colgate-Palmolive Co.		229		16,761
Corning, Inc.		1,700		45,900
Cummins, Inc.		293		44,302

See accompanying notes to schedules of investments.

91

SSGA Active Trust

State Street Disciplined Global Equity Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
United States – (continued)
Delta Air Lines, Inc.		481	$	22,107
DTE Energy Co.		492		50,238
Edison International		520		41,397
Eli Lilly & Co.		330		27,756
Entergy Corp.		494		37,524
Everest Re Group, Ltd.		202		47,230
Exelon Corp.		1,239		44,579
Express Scripts Holding Co.(a)		534		35,196
Foot Locker, Inc.		581		43,465
HCA Holdings, Inc.(a)		522		46,453
Hologic, Inc.(a)		824		35,061
HP, Inc.		1,887		33,740
IDEXX Laboratories, Inc.(a)		175		27,057
International Business Machines Corp.		150		26,121
Johnson & Johnson		386		48,076
JPMorgan Chase & Co.		474		41,636
Lincoln National Corp.		250		16,362
McKesson Corp.		123		18,236
Motorola Solutions, Inc.		441		38,023
NetApp, Inc.		800		33,480
PepsiCo, Inc.		309		34,565
Pfizer, Inc.		404		13,821
Pinnacle West Capital Corp.		493		41,106
PNC Financial Services Group, Inc.		196		23,567
PPL Corp.		624		23,331
Principal Financial Group, Inc.		667		42,094
Procter & Gamble Co.		421		37,827
Prudential Financial, Inc.		103		10,988
Public Service Enterprise Group, Inc.		846		37,520
Quest Diagnostics, Inc.		580		56,950
Republic Services, Inc.		211		13,253
Southwest Airlines Co.		503		27,041
Synopsys, Inc.(a)		404		29,141
Sysco Corp.		659		34,215
Texas Instruments, Inc.		563		45,355
Tyson Foods, Inc. Class A		599		36,964
UnitedHealth Group, Inc.		266		43,627
Universal Health Services, Inc. Class B		141		17,547
US Bancorp		808		41,612
Valero Energy Corp.		364		24,130
Wal-Mart Stores, Inc.		164		11,821
Waste Management, Inc.		713		51,992
				2,247,405
TOTAL COMMON STOCKS (Cost $3,476,942)				3,861,843
SHORT-TERM INVESTMENT – 0.9%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(c)(d) (Cost $35,447)		35,447		35,447
TOTAL INVESTMENTS – 99.4% (Cost $3,512,389)				3,897,290
Other Assets In Excess of Liabilities – 0.6%				22,138
NET ASSETS – 100.0%			$	3,919,428

^(a) Non-income producing security.

^(b) Security purchased pursuant to Rule 144A of the Securities Act of 1933. This security, which represents 1.3% of net assets as of March 31, 2017, is considered liquid and may be resold in transactions exempt from registration, normally to qualified institutional buyers.

^(c) The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(d) The rate shown is the annualized seven-day yield at March 31, 2017.

REIT Real Estate Investment Trust

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Common Stocks
Australia	$	50,194	$	–	$	–	$	50,194
Canada		131,904		–		–		131,904
Denmark		52,889		–		–		52,889
France		89,449		–		–		89,449
Germany		110,007		–		–		110,007
Hong Kong		283,721		–		–		283,721
Italy		44,944		–		–		44,944
Japan		480,715		–		–		480,715
Netherlands		45,807		–		–		45,807
New Zealand		36,167		–		–		36,167
Norway		31,499		–		–		31,499
Singapore		43,872		–		–		43,872
Spain		26,984		–		–		26,984
Sweden		36,991		–		–		36,991

See accompanying notes to schedules of investments.

92

SSGA Active Trust

State Street Disciplined Global Equity Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Switzerland	$	112,714	$	–	$	–	$	112,714
United Kingdom		36,581		–		–		36,581
United States		2,247,405		–		–		2,247,405
Short-Term Investment		35,447		–		–		35,447
Total Investments	$	3,897,290	$	–	$	–	$	3,897,290

Affiliate Table

	Number of shares held at 6/30/16		Value at 6/30/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income
State Street Institutional U.S. Government Money Market Fund, Premier Class		875	$	875		526,310		491,738		35,447	$	35,447	$	63
TOTAL			$	875							$	35,447	$	63

See accompanying notes to schedules of investments.

93

State Street Institutional Investment Trust

State Street Emerging Markets Equity Index Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – 96.8%
Brazil – 7.3%
AES Tiete Energia SA		17,481	$	75,431
Ambev SA		459,992		2,642,641
Banco Bradesco SA		80,280		810,398
Banco Bradesco SA Preference Shares		270,790		2,761,675
Banco do Brasil SA		82,898		881,735
Banco Santander Brasil SA		39,800		346,610
BB Seguridade Participacoes SA		68,537		630,335
BM&FBovespa SA		194,593		1,182,283
BR Malls Participacoes SA(a)		55,700		254,207
Braskem SA Class A, Preference Shares		14,900		149,002
BRF SA		59,823		727,497
CCR SA		117,969		670,669
Centrais Eletricas Brasileiras SA(a)		21,100		113,643
Centrais Eletricas Brasileiras SA Class B, Preference Shares(a)		21,000		145,977
Cia Brasileira de Distribuicao Preference Shares		15,300		289,620
Cia de Saneamento Basico do Estado de Sao Paulo		32,800		336,683
Cia Energetica de Minas Gerais Preference Shares		72,800		236,632
Cia Paranaense de Energia Preference Shares		9,900		102,089
Cia Siderurgica Nacional SA(a)		60,600		173,882
Cielo SA		99,464		886,888
Cosan SA Industria e Comercio		11,600		141,979
CPFL Energia SA		20,286		164,655
Duratex SA		28,078		81,361
EDP – Energias do Brasil SA		28,850		126,760
Embraer SA		65,917		361,044
Engie Brasil Energia SA		16,270		181,253
Equatorial Energia SA		19,300		357,375
Fibria Celulose SA		24,735		224,917
Gerdau SA Preference Shares		88,500		303,553
Hypermarcas SA		33,300		304,162
Itau Unibanco Holding SA Preference Shares		314,841		3,758,319
Itausa – Investimentos Itau SA(a)		6,089		18,219
Itausa – Investimentos Itau SA Preference Shares		376,519		1,126,610
JBS SA		69,400		223,177
Klabin SA		53,907		257,230
Kroton Educacional SA		132,621		554,720
Localiza Rent a Car SA		15,900		208,681
Lojas Americanas SA		17,298		72,244
Lojas Americanas SA Preference Shares		63,774		328,617
Lojas Renner SA		61,811		541,220
M Dias Branco SA		3,200		128,808
Multiplan Empreendimentos Imobiliarios SA		8,018		167,434
Natura Cosmeticos SA		17,400		158,987
Odontoprev SA		25,600		91,113
Petroleo Brasileiro SA(a)		289,814		1,382,914
Petroleo Brasileiro SA Preference Shares(a)		381,298		1,740,187
Porto Seguro SA		10,900		97,535
Qualicorp SA		22,136		143,973
Raia Drogasil SA		22,500		415,778
Rumo SA(a)		78,023		210,113
Sul America SA		19,433		102,155
Suzano Papel e Celulose SA Class A, Preference Shares		37,500		156,617
Telefonica Brasil SA Preference Shares		43,855		645,749
Tim Participacoes SA		83,100		264,354
Ultrapar Participacoes SA		34,882		786,862
Vale SA		125,233		1,175,039
Vale SA Preference Shares		187,229		1,663,563
WEG SA		54,500		298,682
				32,383,856
Chile – 1.2%
AES Gener SA		291,284		117,309
Aguas Andinas SA Class A		263,499		153,104
Banco de Chile		2,387,563		287,075
Banco de Credito e Inversiones		3,725		204,258
Banco Santander Chile		6,524,741		407,682
Cencosud SA		135,761		415,789
Cia Cervecerias Unidas SA		14,676		184,385
Colbun SA		726,392		160,845
Embotelladora Andina SA Class B, Preference Shares		25,379		98,541
Empresa Nacional de Telecomunicaciones SA(a)		14,611		176,015
Empresas CMPC SA		120,680		293,487
Empresas COPEC SA		44,479		481,815
Enel Americas SA		2,819,876		583,818
Enel Chile SA		1,949,784		215,090
Enel Generacion Chile SA		320,424		240,290
Itau CorpBanca		14,637,944		131,875
Latam Airlines Group SA(a)		29,251		369,202
SACI Falabella		58,192		487,777
Sociedad Quimica y Minera de Chile SA Class B, Preference Shares		9,270		316,978
				5,325,335
China – 25.5%
3SBio, Inc.(a)(b)		94,800		117,105
58.com, Inc. ADR(a)		8,300		293,737
AAC Technologies Holdings, Inc.		71,500		836,766
Agricultural Bank of China, Ltd. Class H		2,407,000		1,108,803
Air China, Ltd. Class H		184,000		148,924
Alibaba Group Holding, Ltd. ADR(a)		109,282		11,783,878
Alibaba Health Information Technology, Ltd.(a)		298,500		134,434
Aluminum Corp. of China, Ltd. Class H(a)		384,000		187,763
Anhui Conch Cement Co., Ltd. Class H		118,500		402,548
ANTA Sports Products, Ltd.		95,000		262,819
AviChina Industry & Technology Co., Ltd. Class H		212,000		147,035
Baidu, Inc. ADR(a)		26,500		4,571,780

See accompanying notes to schedules of investments.

94

State Street Institutional Investment Trust

State Street Emerging Markets Equity Index Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
China – (continued)
Bank of China, Ltd. Class H		7,743,000	$	3,845,844
Bank of Communications Co., Ltd. Class H		856,000		665,282
Beijing Capital International Airport Co., Ltd. Class H		150,000		179,502
Beijing Enterprises Holdings, Ltd.		50,000		258,637
Beijing Enterprises Water Group, Ltd.		420,000		311,291
Belle International Holdings, Ltd.		622,000		404,182
Brilliance China Automotive Holdings, Ltd.		296,000		495,143
Byd Co., Ltd. Class H		63,500		352,165
CGN Power Co., Ltd. Class H(b)		1,019,700		314,904
China Cinda Asset Management Co., Ltd. Class H		839,481		326,222
China CITIC Bank Corp., Ltd. Class H		857,000		567,915
China Coal Energy Co., Ltd. Class H(a)		193,000		97,351
China Communications Construction Co., Ltd. Class H		425,000		599,369
China Communications Services Corp., Ltd. Class H		240,000		157,190
China Conch Venture Holdings, Ltd.		130,500		256,248
China Construction Bank Corp. Class H		8,196,000		6,591,392
China Everbright Bank Co., Ltd. Class H		286,700		140,187
China Everbright International, Ltd.		236,000		317,643
China Everbright, Ltd.		86,000		173,516
China Evergrande Group		395,000		365,953
China Galaxy Securities Co., Ltd. Class H		284,500		262,480
China Huarong Asset Management Co., Ltd.(a)(b)		594,500		243,262
China Huishan Dairy Holdings Co., Ltd.(c)		406,100		21,947
China Jinmao Holdings Group, Ltd.		338,000		108,296
China Life Insurance Co., Ltd. Class H		726,000		2,228,025
China Longyuan Power Group Corp., Ltd. Class H		308,000		239,377
China Medical System Holdings, Ltd.		123,000		218,097
China Mengniu Dairy Co., Ltd.		264,000		546,921
China Merchants Bank Co., Ltd. Class H		379,000		1,002,181
China Merchants Port Holdings Co., Ltd.		129,146		378,057
China Minsheng Banking Corp., Ltd. Class H		576,500		615,705
China Mobile, Ltd.		598,500		6,549,884
China National Building Material Co., Ltd. Class H		282,000		181,432
China Oilfield Services, Ltd. Class H		180,000		172,785
China Overseas Land & Investment, Ltd.		376,000		1,074,078
China Pacific Insurance Group Co., Ltd. Class H		256,000		923,992
China Petroleum & Chemical Corp. Class H		2,490,000		2,018,529
China Power International Development, Ltd.		338,000		125,693
China Railway Construction Corp., Ltd. Class H		191,500		271,547
China Railway Group, Ltd. Class H		383,000		342,514
China Resources Beer Holdings Co., Ltd.(a)		155,333		353,379
China Resources Gas Group, Ltd.		88,000		311,394
China Resources Land, Ltd.		268,000		724,185
China Resources Power Holdings Co., Ltd.		184,000		331,941
China Shenhua Energy Co., Ltd. Class H		332,500		771,833
China Southern Airlines Co., Ltd. Class H		178,000		123,225
China State Construction International Holdings, Ltd.		176,000		314,791
China Taiping Insurance Holdings Co., Ltd.(a)		155,000		375,359
China Telecom Corp., Ltd. Class H		1,348,000		657,392
China Unicom Hong Kong, Ltd.		582,000		778,846
China Vanke Co., Ltd. Class H		125,800		339,934
Chongqing Changan Automobile Co., Ltd. Class B		77,300		107,423
Chongqing Rural Commercial Bank Co., Ltd. Class H		249,000		168,211
CITIC Securities Co., Ltd. Class H		211,500		435,437
CITIC, Ltd.		427,000		608,783
CNOOC, Ltd.		1,743,000		2,081,328
COSCO SHIPPING Ports, Ltd.		165,272		182,466
Country Garden Holdings Co., Ltd.		536,000		482,100
CRRC Corp., Ltd. Class H		409,000		397,343
CSPC Pharmaceutical Group, Ltd.		410,000		537,065
Ctrip.com International, Ltd. ADR(a)		36,267		1,782,523
Dongfeng Motor Group Co., Ltd. Class H		262,000		294,314
ENN Energy Holdings, Ltd.		74,000		416,586
Far East Horizon, Ltd.		183,000		171,897
Fosun International, Ltd.		255,000		383,246
Fuyao Glass Industry Group Co., Ltd. Class H(b)		46,456		161,100
Geely Automobile Holdings, Ltd.		515,000		788,586

See accompanying notes to schedules of investments.

95

State Street Institutional Investment Trust

State Street Emerging Markets Equity Index Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
China – (continued)
GF Securities Co., Ltd. Class H		131,000	$	274,423
GOME Electrical Appliances Holding, Ltd.		1,146,000		156,310
Great Wall Motor Co., Ltd. Class H		296,500		337,647
Guangdong Investment, Ltd.		278,000		396,351
Guangzhou Automobile Group Co., Ltd. Class H		202,000		323,346
Guangzhou R&F Properties Co., Ltd. Class H		89,600		139,966
Haitian International Holdings, Ltd.		65,000		151,219
Haitong Securities Co., Ltd. Class H		294,800		498,446
Hengan International Group Co., Ltd.		70,000		520,620
HengTen Networks Group, Ltd.(a)		1,955,500		35,982
Huaneng Power International, Inc. Class H		408,000		272,472
Huaneng Renewables Corp., Ltd. Class H		370,000		128,071
Huatai Securities Co., Ltd. Class H(b)		140,600		273,547
Industrial & Commercial Bank of China, Ltd. Class H		7,188,000		4,698,583
JD.com, Inc. ADR(a)		65,967		2,052,233
Jiangsu Expressway Co., Ltd. Class H		122,000		175,194
Jiangxi Copper Co., Ltd. Class H		119,000		185,280
Kingsoft Corp., Ltd.		73,000		201,017
Kunlun Energy Co., Ltd.		312,000		289,056
Lenovo Group, Ltd.		706,000		465,125
Longfor Properties Co., Ltd.		144,500		237,626
NetEase, Inc. ADR		7,773		2,207,532
New China Life Insurance Co., Ltd. Class H		74,200		353,265
New Oriental Education & Technology Group, Inc. ADR(a)		12,900		778,902
People’s Insurance Co. Group of China, Ltd. Class H		674,000		279,261
PetroChina Co., Ltd. Class H		2,052,000		1,502,397
PICC Property & Casualty Co., Ltd. Class H		444,000		684,439
Ping An Insurance Group Co. of China, Ltd. Class H		508,500		2,846,265
Semiconductor Manufacturing International Corp.(a)		273,300		338,306
Shandong Weigao Group Medical Polymer Co., Ltd. Class H		176,000		125,916
Shanghai Electric Group Co., Ltd. Class H(a)		268,000		132,767
Shanghai Fosun Pharmaceutical Group Co., Ltd. Class H		38,000		139,844
Shanghai Industrial Holdings, Ltd.		46,000		135,251
Shanghai Lujiazui Finance & Trade Zone Development Co., Ltd. Class B		85,160		134,382
Shanghai Pharmaceuticals Holding Co., Ltd. Class H		68,300		178,846
Shenzhou International Group Holdings, Ltd.		54,000		340,822
SINA Corp.(a)		5,400		389,448
Sino-Ocean Group Holding, Ltd.		280,500		131,741
Sinopec Engineering Group Co., Ltd. Class H		127,200		130,613
Sinopec Shanghai Petrochemical Co., Ltd. Class H		338,000		187,452
Sinopharm Group Co., Ltd. Class H		114,400		530,672
Sinotrans, Ltd. Class H		184,000		85,945
SOHO China, Ltd.		208,500		111,608
Sunac China Holdings, Ltd.		190,700		247,347
Sunny Optical Technology Group Co., Ltd.		69,100		505,035
TAL Education Group ADR(a)		4,300		458,251
Tencent Holdings, Ltd.		553,500		15,868,211
Tingyi Cayman Islands Holding Corp.		194,000		243,639
TravelSky Technology, Ltd. Class H		93,000		219,710
Tsingtao Brewery Co., Ltd. Class H		36,000		165,837
Vipshop Holdings, Ltd. ADR(a)		38,888		518,766
Want Want China Holdings, Ltd.		541,000		374,520
Weibo Corp. ADR(a)		3,100		161,758
Weichai Power Co., Ltd. Class H		93,000		164,185
Yanzhou Coal Mining Co., Ltd. Class H		174,000		135,233
Yum China Holdings, Inc.(a)		35,300		960,160
YY, Inc. ADR(a)		2,900		133,719
Zhejiang Expressway Co., Ltd. Class H		144,000		188,257
Zhuzhou CRRC Times Electric Co., Ltd. Class H		52,000		276,343
Zijin Mining Group Co., Ltd. Class H		572,000		211,975
ZTE Corp. Class H		73,600		135,049
				112,547,200
Colombia – 0.4%
Bancolombia SA Preference Shares		44,488		441,210
Cementos Argos SA		45,261		184,556
Corp. Financiera Colombiana SA		7,857		76,456
Ecopetrol SA(a)		485,772		226,614
Grupo Argos SA		29,085		203,423
Grupo Aval Acciones y Valores SA Preference Shares		325,832		131,735
Grupo de Inversiones Suramericana SA		22,442		303,066
Grupo de Inversiones Suramericana SA Preference Shares		10,329		136,346

See accompanying notes to schedules of investments.

96

State Street Institutional Investment Trust

State Street Emerging Markets Equity Index Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Colombia – (continued)
Interconexion Electrica SA ESP		39,028	$	156,443
				1,859,849
Czech Republic – 0.2%
CEZ A/S		15,593		269,076
Komercni banka A/S		7,338		273,001
Moneta Money Bank A/S(a)(b)		48,304		164,033
O2 Czech Republic A/S		6,222		69,691
				775,801
Egypt – 0.1%
Commercial International Bank Egypt SAE		99,367		413,488
Global Telecom Holding SAE(a)		216,036		80,191
Talaat Moustafa Group		100,831		51,337
				545,016
Greece – 0.3%
Alpha Bank AE(a)		134,673		241,986
Eurobank Ergasias SA(a)		179,074		110,129
FF Group(a)		3,021		57,998
Hellenic Telecommunications Organization SA		24,268		228,411
JUMBO SA		10,278		162,474
National Bank of Greece SA(a)		524,073		135,086
OPAP SA		21,919		204,896
Piraeus Bank SA(a)		633,039		115,101
Titan Cement Co. SA		4,442		113,548
				1,369,629
Hong Kong – 0.5%
Alibaba Pictures Group, Ltd.(a)		1,125,900		204,274
China Gas Holdings, Ltd.		168,000		270,650
Fullshare Holdings, Ltd.		653,600		289,312
GCL-Poly Energy Holdings, Ltd.(a)		1,201,000		159,175
Haier Electronics Group Co., Ltd.		125,000		286,303
Nine Dragons Paper Holdings, Ltd.		158,000		169,761
Shimao Property Holdings, Ltd.		112,500		178,634
Sino Biopharmaceutical, Ltd.		424,000		349,173
Sun Art Retail Group, Ltd.		231,500		216,859
				2,124,141
Hungary – 0.3%
MOL Hungarian Oil & Gas PLC		3,577		245,290
OTP Bank PLC		23,161		649,176
Richter Gedeon Nyrt		13,425		305,475
				1,199,941
India – 8.6%
ACC, Ltd.		4,283		95,639
Adani Ports & Special Economic Zone, Ltd.		80,678		423,549
Ambuja Cements, Ltd.		56,616		206,812
Apollo Hospitals Enterprise, Ltd.		7,680		137,822
Ashok Leyland, Ltd.		110,799		144,609
Asian Paints, Ltd.		28,269		465,817
Aurobindo Pharma, Ltd.		26,013		270,405
Axis Bank, Ltd.		162,971		1,231,788
Bajaj Auto, Ltd.		8,179		353,435
Bajaj Finance, Ltd.		15,683		283,531
Bajaj Finserv, Ltd.		3,686		231,599
Bharat Forge, Ltd.		10,392		167,239
Bharat Heavy Electricals, Ltd.		55,416		139,105
Bharat Petroleum Corp., Ltd.		49,480		494,876
Bharti Airtel, Ltd.		97,563		523,236
Bharti Infratel, Ltd.		52,473		262,466
Bosch, Ltd.		730		254,981
Cadila Healthcare, Ltd.		19,347		131,840
Cairn India, Ltd.		42,320		199,722
Cipla, Ltd.		32,757		300,153
Coal India, Ltd.		67,903		306,392
Container Corp. Of India, Ltd.		2,893		56,537
Dabur India, Ltd.		51,225		218,792
Divi’s Laboratories, Ltd.		7,375		70,769
Dr Reddy’s Laboratories, Ltd.		9,488		384,576
Dr Reddy’s Laboratories, Ltd. ADR		1,788		71,788
Eicher Motors, Ltd.		1,309		513,440
GAIL India, Ltd.		29,059		168,463
GAIL India, Ltd. GDR		1,438		66,651
Glenmark Pharmaceuticals, Ltd.		13,519		174,934
Godrej Consumer Products, Ltd.		11,331		293,156
Grasim Industries, Ltd.		19,502		315,408
Havells India, Ltd.		25,088		179,269
HCL Technologies, Ltd.		55,412		747,531
Hero MotoCorp, Ltd.		4,822		239,225
Hindalco Industries, Ltd.		105,784		316,937
Hindustan Petroleum Corp., Ltd.		39,069		316,475
Hindustan Unilever, Ltd.		63,367		889,783
Housing Development Finance Corp., Ltd.		146,154		3,375,823
ICICI Bank, Ltd.		83,624		355,886
ICICI Bank, Ltd. ADR		12,741		109,573
Idea Cellular, Ltd.		121,947		161,695
IDFC Bank, Ltd.		136,601		125,273
Indiabulls Housing Finance, Ltd.		28,540		438,813
Infosys, Ltd.		168,561		2,654,248
Infosys, Ltd. ADR		11,030		174,274
ITC, Ltd.		331,699		1,434,119
JSW Steel, Ltd.		81,174		234,890
Larsen & Toubro, Ltd.		24,632		596,008
Larsen & Toubro, Ltd. GDR		6,479		156,792
LIC Housing Finance, Ltd.		28,342		269,322
Lupin, Ltd.		21,614		479,812
Mahindra & Mahindra Financial Services, Ltd.		27,519		133,537
Mahindra & Mahindra, Ltd.		28,158		560,255
Mahindra & Mahindra, Ltd. GDR		7,826		155,737
Marico, Ltd.		44,298		201,451
Maruti Suzuki India, Ltd.		10,311		958,295
Motherson Sumi Systems, Ltd.		42,119		241,292
Nestle India, Ltd.		2,245		230,602
NTPC, Ltd.		157,119		401,296
Oil & Natural Gas Corp., Ltd.		124,940		355,954
Piramal Enterprises, Ltd.		7,469		219,003
Power Finance Corp., Ltd.		59,484		133,744
Reliance Industries, Ltd.		115,173		2,342,303
Reliance Industries, Ltd. GDR(b)		5,573		224,592

See accompanying notes to schedules of investments.

97

State Street Institutional Investment Trust

State Street Emerging Markets Equity Index Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
India – (continued)
Shree Cement, Ltd.		819	$	214,164
Shriram Transport Finance Co., Ltd.		14,367		238,510
Siemens, Ltd.		7,109		137,396
State Bank of India		124,440		562,074
State Bank of India GDR		3,420		152,703
Sun Pharmaceutical Industries, Ltd.		92,946		981,920
Tata Consultancy Services, Ltd.		45,985		1,715,966
Tata Motors, Ltd.		140,063		1,008,061
Tata Motors, Ltd. ADR		2,430		86,629
Tata Motors, Ltd. Class A		36,991		160,730
Tata Power Co., Ltd.		103,538		143,982
Tata Steel, Ltd.		18,685		138,623
Tata Steel, Ltd. GDR		10,534		77,636
Tech Mahindra, Ltd.		44,343		312,419
Titan Co., Ltd.		30,217		213,406
UltraTech Cement, Ltd.		8,581		524,421
United Spirits, Ltd.(a)		6,295		210,851
UPL, Ltd.		33,993		381,364
Vedanta, Ltd.		88,729		376,724
Vedanta, Ltd. ADR		3,228		55,425
Wipro, Ltd.		44,279		351,313
Wipro, Ltd. ADR		12,048		123,251
Yes Bank, Ltd.		30,221		719,421
Zee Entertainment Enterprises, Ltd.		56,619		466,920
				37,727,248
Indonesia – 2.4%
Adaro Energy Tbk PT		1,370,000		179,918
AKR Corporindo Tbk PT		174,500		81,845
Astra International Tbk PT		1,979,600		1,281,306
Bank Central Asia Tbk PT		1,200,000		1,490,376
Bank Danamon Indonesia Tbk PT		325,500		114,806
Bank Mandiri Persero Tbk PT		900,900		791,004
Bank Negara Indonesia Persero Tbk PT		716,600		348,203
Bank Rakyat Indonesia Persero Tbk PT		1,078,000		1,049,645
Bumi Serpong Damai Tbk PT		694,500		98,243
Charoen Pokphand Indonesia Tbk PT		744,000		178,665
Gudang Garam Tbk PT		47,500		233,570
Hanjaya Mandala Sampoerna Tbk PT		905,000		264,868
Indocement Tunggal Prakarsa Tbk PT		148,500		184,991
Indofood CBP Sukses Makmur Tbk PT		219,000		133,942
Indofood Sukses Makmur Tbk PT		427,000		256,351
Jasa Marga Persero Tbk PT		196,389		68,089
Kalbe Farma Tbk PT		2,074,000		239,688
Lippo Karawaci Tbk PT		1,752,500		95,348
Matahari Department Store Tbk PT		234,800		232,148
Media Nusantara Citra Tbk PT		536,000		74,414
Pakuwon Jati Tbk PT		2,444,500		112,819
Perusahaan Gas Negara Persero Tbk		1,079,000		204,861
Semen Indonesia Persero Tbk PT		294,000		198,567
Summarecon Agung Tbk PT		911,500		91,660
Surya Citra Media Tbk PT		558,000		113,061
Telekomunikasi Indonesia Persero Tbk PT		4,904,000		1,519,907
Tower Bersama Infrastructure Tbk PT		224,500		91,818
Unilever Indonesia Tbk PT		148,600		483,141
United Tractors Tbk PT		163,000		324,153
Waskita Karya Persero Tbk PT		428,500		76,211
XL Axiata Tbk PT(a)		351,500		80,717
				10,694,335
Malaysia – 2.4%
AirAsia Bhd		151,400		107,422
Alliance Financial Group Bhd		98,800		91,087
AMMB Holdings Bhd		180,100		189,236
Astro Malaysia Holdings Bhd		146,400		90,642
Axiata Group Bhd		257,510		294,430
Berjaya Sports Toto Bhd		68,400		44,977
British American Tobacco Malaysia Bhd		14,300		147,346
CIMB Group Holdings Bhd		304,197		382,867
Dialog Group Bhd		292,500		116,987
DiGi.Com Bhd		346,000		401,080
Felda Global Ventures Holdings Bhd		125,800		59,411
Gamuda Bhd		168,800		197,579
Genting Bhd		220,100		476,954
Genting Malaysia Bhd		285,100		351,100
Genting Plantations Bhd		23,600		62,286
HAP Seng Consolidated Bhd		63,800		129,604
Hartalega Holdings Bhd		59,200		66,350
Hong Leong Bank Bhd		64,800		201,480
Hong Leong Financial Group Bhd		23,900		85,868
IHH Healthcare Bhd		315,200		427,342
IJM Corp. Bhd		281,600		216,346
IOI Corp. Bhd		222,300		233,577
IOI Properties Group Bhd		174,625		81,680
Kuala Lumpur Kepong Bhd		42,000		234,224
Lafarge Malaysia Bhd		33,800		51,172
Malayan Banking Bhd		344,683		694,740
Malaysia Airports Holdings Bhd		72,400		113,700
Maxis Bhd		181,500		264,119
MISC Bhd		111,300		184,096
Petronas Chemicals Group Bhd		237,400		413,056
Petronas Dagangan Bhd		18,600		100,870
Petronas Gas Bhd		65,700		293,353
PPB Group Bhd		47,800		180,809
Public Bank Bhd		265,800		1,195,214
RHB Capital Bhd		81,910		95,690
Sapura Energy Bhd(a)		365,700		150,395
Sime Darby Bhd		223,769		469,230
Telekom Malaysia Bhd		103,800		150,581
Tenaga Nasional Bhd		332,100		1,029,581
UMW Holdings Bhd(a)		40,800		55,316
Westports Holdings Bhd		92,300		84,468

See accompanying notes to schedules of investments.

98

State Street Institutional Investment Trust

State Street Emerging Markets Equity Index Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Malaysia – (continued)
YTL Corp. Bhd		398,400	$	134,135
YTL Power International Bhd		182,800		62,785
				10,413,185
Mexico – 3.6%
Alfa SAB de CV Class A		278,540		404,482
America Movil SAB de CV Series L		3,236,921		2,284,079
Arca Continental SAB de CV		41,200		284,377
Cemex SAB de CV Series CPO(a)		1,371,882		1,235,369
Coca-Cola Femsa SAB de CV Series L		47,200		336,216
El Puerto de Liverpool SAB de CV Series C1		17,300		134,273
Fibra Uno Administracion SA de CV REIT		252,658		429,410
Fomento Economico Mexicano SAB de CV		178,680		1,577,123
Gentera SAB de CV		99,300		163,021
Gruma SAB de CV Class B		20,700		290,769
Grupo Aeroportuario del Pacifico SAB de CV Class B		35,000		337,881
Grupo Aeroportuario del Sureste SAB de CV Class B		20,000		344,438
Grupo Bimbo SAB de CV Series A		162,815		402,409
Grupo Carso SAB de CV Series A1		55,600		253,259
Grupo Financiero Banorte SAB de CV Series O		244,103		1,396,381
Grupo Financiero Inbursa SAB de CV Series O		220,626		363,139
Grupo Financiero Santander Mexico SAB de CV Class B		176,691		316,904
Grupo Lala SAB de CV		55,800		100,673
Grupo Mexico SAB de CV Series B		369,936		1,103,278
Grupo Televisa SAB Series CPO		239,129		1,231,567
Industrias Penoles SAB de CV		13,385		342,553
Infraestructura Energetica Nova SAB de CV		51,600		245,066
Kimberly-Clark de Mexico SAB de CV Class A		146,389		315,953
Mexichem SAB de CV		105,510		285,649
OHL Mexico SAB de CV		78,200		109,863
Promotora y Operadora de Infraestructura SAB de CV(a)		25,700		275,829
Wal-Mart de Mexico SAB de CV		507,194		1,163,354
				15,727,315
Netherlands – 0.3%
Steinhoff International Holdings NV		290,988		1,392,576
Peru – 0.4%
Cia de Minas Buenaventura SAA ADR		18,500		222,740
Credicorp, Ltd.		6,600		1,077,780
Southern Copper Corp.		8,167		293,114
				1,593,634
Philippines – 1.1%
Aboitiz Equity Ventures, Inc.		187,950		278,881
Aboitiz Power Corp.		150,600		125,312
Alliance Global Group, Inc.		185,300		46,828
Ayala Corp.		24,530		413,111
Ayala Land, Inc.		707,000		465,697
Bank of the Philippine Islands		65,600		132,311
BDO Unibank, Inc.		193,759		454,132
DMCI Holdings, Inc.		374,330		85,050
Energy Development Corp.		910,900		109,290
Globe Telecom, Inc.		2,995		121,292
GT Capital Holdings, Inc.		7,820		178,453
International Container Terminal Services, Inc.		44,590		79,893
JG Summit Holdings, Inc.		280,440		454,685
Jollibee Foods Corp.		43,030		169,376
Megaworld Corp.		1,060,000		71,406
Metro Pacific Investments Corp.		1,365,000		163,773
Metropolitan Bank & Trust Co.		59,490		94,852
PLDT, Inc.		9,355		306,893
Robinsons Land Corp.		158,300		72,564
Security Bank Corp.		10,160		40,903
SM Investments Corp.		23,100		320,891
SM Prime Holdings, Inc.		808,400		455,959
Universal Robina Corp.		83,900		273,396
				4,914,948
Poland – 1.2%
Alior Bank SA(a)		8,745		157,774
Bank Handlowy w Warszawie SA		2,948		57,071
Bank Millennium SA(a)		54,732		89,103
Bank Pekao SA		15,128		504,400
Bank Zachodni WBK SA		3,309		286,054
CCC SA		2,835		170,302
Cyfrowy Polsat SA(a)		18,302		111,791
Eurocash SA		6,893		55,517
Grupa Azoty SA		4,028		70,252
Grupa Lotos SA(a)		9,438		130,137
Jastrzebska Spolka Weglowa SA(a)		5,438		86,197
KGHM Polska Miedz SA		13,826		404,107
LPP SA		129		221,238
mBank SA(a)		1,490		140,465
Orange Polska SA		63,322		73,999
PGE Polska Grupa Energetyczna SA		82,701		237,961
Polski Koncern Naftowy Orlen SA		31,207		787,668
Polskie Gornictwo Naftowe i Gazownictwo SA		172,237		257,359
Powszechna Kasa Oszczednosci Bank Polski SA(a)		85,136		688,918
Powszechny Zaklad Ubezpieczen SA		54,839		481,681
Synthos SA		53,096		70,358
Tauron Polska Energia SA(a)		109,548		93,734
				5,176,086

See accompanying notes to schedules of investments.

99

State Street Institutional Investment Trust

State Street Emerging Markets Equity Index Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Qatar – 0.8%
Barwa Real Estate Co.		9,242	$	90,742
Commercial Bank QSC		21,159		197,289
Doha Bank QSC		12,789		110,289
Ezdan Holding Group QSC		75,502		327,629
Industries Qatar QSC		14,741		446,550
Masraf Al Rayan QSC		36,165		418,652
Ooredoo QSC		7,871		208,821
Qatar Electricity & Water Co. QSC		2,730		164,950
Qatar Gas Transport Co., Ltd.		25,044		146,161
Qatar Insurance Co. SAQ		13,384		258,410
Qatar Islamic Bank SAQ		5,877		165,120
Qatar National Bank QPSC		22,532		904,102
				3,438,715
Romania – 0.1%
New Europe Property Investments PLC		22,771		236,392
Russia – 3.7%
Alrosa PJSC(a)		253,545		410,050
Gazprom PAO(a)		1,039,508		2,354,220
Inter RAO UES PJSC(a)		3,010,000		212,521
Lukoil PJSC(a)		41,503		2,207,305
Magnit PJSC(a)		7,406		1,219,964
Magnit PJSC GDR		2,000		76,400
MMC Norilsk Nickel PJSC(a)		5,416		854,188
Mobile TeleSystems PJSC ADR		48,370		533,521
Moscow Exchange MICEX-RTS PJSC(a)		131,800		263,053
Novatek OAO(a)		88,050		1,098,791
PhosAgro PJSC GDR		9,018		131,663
Rosneft Oil Co. PJSC(a)		114,221		656,840
Rostelecom PJSC(a)		84,040		114,734
Rushhydro PJSC(a)		10,994,000		182,676
Sberbank of Russia PJSC(a)		1,048,154		2,971,530
Severstal PAO(a)		20,160		291,906
Sistema JSFC(a)		262,100		103,808
Sistema PJSC FC GDR		16,136		144,417
Surgutneftegas OAO(a)		708,200		370,178
Surgutneftegas OJSC Preference Shares(a)		685,800		391,820
Tatneft PAO(a)		140,456		871,526
Transneft PJSC Preference Shares(a)		152		461,866
VTB Bank PJSC(a)		497,570,000		582,157
				16,505,134
South Africa – 6.0%
Anglo American Platinum, Ltd.(a)		5,520		126,004
AngloGold Ashanti, Ltd.		40,314		430,687
Aspen Pharmacare Holdings, Ltd.		35,229		721,776
Barclays Africa Group, Ltd.		41,317		429,879
Bid Corp., Ltd.		32,401		627,541
Bidvest Group, Ltd.		31,518		361,680
Brait SE(a)		33,478		195,244
Capitec Bank Holdings, Ltd.		3,912		222,130
Coronation Fund Managers, Ltd.		20,517		96,765
Discovery, Ltd.		34,097		327,296
Exxaro Resources, Ltd.		17,913		157,491
FirstRand, Ltd.		327,698		1,132,997
Fortress Income Fund, Ltd.		74,075		183,630
Fortress Income Fund, Ltd. Class A		91,302		114,325
Foschini Group, Ltd.		20,607		237,425
Gold Fields, Ltd.		80,497		280,775
Growthpoint Properties, Ltd. REIT		208,612		402,950
Hyprop Investments, Ltd.		24,119		220,707
Impala Platinum Holdings, Ltd.(a)		62,155		209,613
Imperial Holdings, Ltd.		15,193		186,956
Investec, Ltd.		24,467		166,887
Liberty Holdings, Ltd.		10,330		83,395
Life Healthcare Group Holdings, Ltd.		96,943		209,593
Massmart Holdings, Ltd.		10,646		108,113
MMI Holdings, Ltd.		96,450		164,649
Mondi, Ltd.		11,590		277,045
Mr. Price Group, Ltd.		23,257		277,341
MTN Group, Ltd.		164,966		1,500,949
Naspers, Ltd. Class N		42,680		7,368,636
Nedbank Group, Ltd.		19,010		342,382
Netcare, Ltd.		93,999		179,463
Pick n Pay Stores, Ltd.		34,091		169,149
Pioneer Foods Group, Ltd.		12,727		167,631
PSG Group, Ltd.		8,789		161,901
Rand Merchant Investment Holdings, Ltd.		66,416		204,567
Redefine Properties, Ltd. REIT		493,133		404,914
Remgro, Ltd.		51,644		793,759
Resilient REIT, Ltd.		28,224		245,304
RMB Holdings, Ltd.		67,637		295,441
Sanlam, Ltd.		137,026		688,464
Sappi, Ltd.		51,861		352,463
Sasol, Ltd.		53,873		1,569,293
Shoprite Holdings, Ltd.		42,143		608,475
Sibanye Gold, Ltd.		74,940		160,401
SPAR Group, Ltd.		18,251		237,190
Standard Bank Group, Ltd.		125,932		1,350,068
Telkom SA SOC, Ltd.		26,589		148,781
Tiger Brands, Ltd.		15,902		474,911
Truworths International, Ltd.		43,916		283,663
Tsogo Sun Holdings, Ltd.		33,135		68,303
Vodacom Group, Ltd.		36,579		414,655
Woolworths Holdings, Ltd.		96,888		505,151
				26,648,808
South Korea – 14.6%
Amorepacific Corp.		3,100		777,564
Amorepacific Corp. Preference Shares		830		123,947
AMOREPACIFIC Group		2,687		287,129
BGF retail Co., Ltd.		1,950		183,090
BNK Financial Group, Inc.		25,400		208,506
Celltrion, Inc.(a)		7,686		619,251
Cheil Worldwide, Inc.		6,230		105,848
CJ CheilJedang Corp.		770		243,056
CJ Corp.		1,437		223,588
CJ E&M Corp.		1,843		140,083
CJ Korea Express Corp.(a)		655		97,521
Coway Co., Ltd.		5,107		439,322

See accompanying notes to schedules of investments.

100

State Street Institutional Investment Trust

State Street Emerging Markets Equity Index Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
South Korea – (continued)
Daelim Industrial Co., Ltd.		2,772	$	200,532
Daewoo Engineering & Construction Co., Ltd.(a)		11,250		72,934
DGB Financial Group, Inc.		16,060		155,818
Dongbu Insurance Co., Ltd.		4,782		273,673
Dongsuh Cos., Inc.		3,452		91,679
Doosan Heavy Industries & Construction Co., Ltd.		4,311		92,326
E-MART, Inc.		1,875		344,552
GS Engineering & Construction Corp.(a)		4,736		130,015
GS Holdings Corp.		5,021		265,350
GS Retail Co., Ltd.		2,570		121,112
Hana Financial Group, Inc.		28,859		953,537
Hankook Tire Co., Ltd.		7,360		358,687
Hanmi Pharm Co., Ltd. (a)		568		151,866
Hanmi Science Co., Ltd.(a)		1,124		58,698
Hanon Systems		18,870		156,589
Hanssem Co., Ltd.		1,040		204,596
Hanwha Chemical Corp.		10,370		244,807
Hanwha Corp.		4,540		145,744
Hanwha Life Insurance Co., Ltd.		20,860		112,666
Hanwha Techwin Co., Ltd.(a)		3,668		154,487
Hotel Shilla Co., Ltd.		3,070		123,810
Hyosung Corp.		2,070		250,814
Hyundai Department Store Co., Ltd.		1,373		124,003
Hyundai Development Co-Engineering & Construction		5,600		203,559
Hyundai Engineering & Construction Co., Ltd.		7,026		310,996
Hyundai Glovis Co., Ltd.		1,824		239,764
Hyundai Heavy Industries Co., Ltd.(a)		4,046		596,969
Hyundai Marine & Fire Insurance Co., Ltd.		6,210		194,358
Hyundai Mobis Co., Ltd.		6,632		1,426,268
Hyundai Motor Co.		15,052		2,119,905
Hyundai Motor Co. Preference Shares(d)		3,610		334,110
Hyundai Motor Co. Preference Shares(d)		2,218		196,948
Hyundai Steel Co.		7,874		411,901
Hyundai Wia Corp.		1,548		93,990
Industrial Bank of Korea		24,180		263,790
Kakao Corp.		2,991		222,259
Kangwon Land, Inc.		11,649		397,918
KB Financial Group, Inc.		38,625		1,692,413
KCC Corp.		586		185,499
KEPCO Plant Service & Engineering Co., Ltd.		2,030		113,272
Kia Motors Corp.		25,728		852,385
Korea Aerospace Industries, Ltd.		6,512		335,412
Korea Electric Power Corp.		25,147		1,044,512
Korea Gas Corp.(a)		2,660		106,919
Korea Investment Holdings Co., Ltd.		3,900		164,258
Korea Zinc Co., Ltd.		806		311,358
Korean Air Lines Co., Ltd.(a)		5,296		149,413
KT Corp.		3,240		92,422
KT&G Corp.		11,430		996,535
Kumho Petrochemical Co., Ltd.		1,752		123,453
LG Chem, Ltd.		4,491		1,180,680
LG Chem, Ltd. Preference Shares		732		124,695
LG Corp.		9,122		572,623
LG Display Co., Ltd.		22,336		604,189
LG Electronics, Inc.		10,352		628,544
LG Household & Health Care, Ltd.		910		659,939
LG Household & Health Care, Ltd. Preference Shares		200		91,210
LG Innotek Co., Ltd.		1,379		168,321
LG Uplus Corp.		10,360		132,476
Lotte Chemical Corp.		1,503		497,954
Lotte Chilsung Beverage Co., Ltd.		59		74,654
Lotte Confectionery Co., Ltd.		537		92,197
Lotte Shopping Co., Ltd.		1,091		212,190
Mirae Asset Daewoo Co., Ltd.		36,120		291,983
NAVER Corp.		2,735		2,091,053
NCSoft Corp.		1,724		470,196
NH Investment & Securities Co., Ltd.		13,420		150,605
OCI Co., Ltd.		1,506		114,064
Orion Corp.		355		212,689
Ottogi Corp.		123		83,591
POSCO		7,206		1,875,119
Posco Daewoo Corp.		4,400		93,839
S-1 Corp.		1,905		152,802
S-Oil Corp.		4,320		388,232
Samsung Biologics Co., Ltd.(a)		1,630		252,160
Samsung C&T Corp.		7,404		844,147
Samsung Card Co., Ltd.		3,246		113,783
Samsung Electro-Mechanics Co., Ltd.		5,440		338,085
Samsung Electronics Co., Ltd.		9,586		17,658,195
Samsung Electronics Co., Ltd. Preference Shares		1,694		2,428,223
Samsung Fire & Marine Insurance Co., Ltd.		3,201		767,118
Samsung Heavy Industries Co., Ltd.(a)		24,903		249,409
Samsung Life Insurance Co., Ltd.		6,846		664,214
Samsung SDI Co., Ltd.		5,347		659,828
Samsung SDS Co., Ltd.		3,426		408,988
Samsung Securities Co., Ltd.		7,181		216,079
Shinhan Financial Group Co., Ltd.		41,498		1,729,238
Shinsegae, Inc.		690		117,849
SK Holdings Co., Ltd.		4,462		971,561
SK Hynix, Inc.		56,830		2,566,319
SK Innovation Co., Ltd.		6,316		940,368
SK Networks Co., Ltd.		11,200		74,814
SK Telecom Co., Ltd.		1,984		447,079
Woori Bank		29,070		337,933
Yuhan Corp.		753		149,819
				64,316,840

See accompanying notes to schedules of investments.

101

State Street Institutional Investment Trust

State Street Emerging Markets Equity Index Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Taiwan – 11.9%
Acer, Inc.(a)		273,000	$	129,561
Advanced Semiconductor Engineering, Inc.		653,615		834,723
Advantech Co., Ltd.		31,000		259,504
Asia Cement Corp.		231,000		232,960
Asia Pacific Telecom Co., Ltd.(a)		190,000		62,431
Asustek Computer, Inc.		68,000		672,324
AU Optronics Corp.		830,000		324,149
Casetek Holdings, Ltd.		14,000		46,601
Catcher Technology Co., Ltd.		63,000		622,889
Cathay Financial Holding Co., Ltd.		790,000		1,267,957
Chailease Holding Co., Ltd.		100,000		233,666
Chang Hwa Commercial Bank, Ltd.		478,560		291,781
Cheng Shin Rubber Industry Co., Ltd.		191,000		394,684
Chicony Electronics Co., Ltd.		54,205		138,270
China Airlines, Ltd.		237,000		82,404
China Development Financial Holding Corp.		1,296,000		355,794
China Life Insurance Co., Ltd.		333,200		329,439
China Steel Corp.		1,146,000		955,551
Chunghwa Telecom Co., Ltd.		372,000		1,262,783
Compal Electronics, Inc.		414,000		270,156
CTBC Financial Holding Co., Ltd.		1,703,040		1,052,385
Delta Electronics, Inc.		188,000		1,006,839
E.Sun Financial Holding Co., Ltd.		768,900		467,536
Eclat Textile Co., Ltd.		19,206		192,424
Eva Airways Corp.		197,950		105,034
Evergreen Marine Corp. Taiwan, Ltd.(a)		182,000		85,174
Far Eastern New Century Corp.		310,000		268,699
Far EasTone Telecommunications Co., Ltd.		158,000		387,938
Feng TAY Enterprise Co., Ltd.		33,880		135,107
First Financial Holding Co., Ltd.		927,350		565,411
Formosa Chemicals & Fibre Corp.		313,000		973,789
Formosa Petrochemical Corp.		113,000		394,760
Formosa Plastics Corp.		400,000		1,193,046
Formosa Taffeta Co., Ltd.		68,000		72,611
Foxconn Technology Co., Ltd.		88,830		270,801
Fubon Financial Holding Co., Ltd.		646,000		1,053,868
Giant Manufacturing Co., Ltd.		26,000		153,811
Highwealth Construction Corp.		82,000		144,042
Hiwin Technologies Corp.		19,380		121,674
Hon Hai Precision Industry Co., Ltd.		1,520,000		4,558,622
Hotai Motor Co., Ltd.		24,000		281,190
HTC Corp.(a)		61,000		155,805
Hua Nan Financial Holdings Co., Ltd.		725,060		405,035
Innolux Corp.		857,000		354,465
Inventec Corp.		253,000		189,693
Largan Precision Co., Ltd.		10,000		1,575,348
Lite-On Technology Corp.		202,958		349,830
MediaTek, Inc.		147,000		1,041,608
Mega Financial Holding Co., Ltd.		1,049,000		847,013
Merida Industry Co., Ltd.		19,000		100,503
Micro-Star International Co., Ltd.		66,000		153,567
Nan Ya Plastics Corp.		460,000		1,090,022
Nanya Technology Corp.		62,000		98,898
Nien Made Enterprise Co., Ltd.		14,000		130,576
Novatek Microelectronics Corp.		57,000		220,730
OBI Pharma, Inc.(a)		10,000		89,973
Pegatron Corp.		188,000		556,395
Phison Electronics Corp.		14,000		125,731
Pou Chen Corp.		213,000		294,834
Powertech Technology, Inc.		66,000		192,067
President Chain Store Corp.		56,000		461,399
Quanta Computer, Inc.		260,000		528,697
Realtek Semiconductor Corp.		43,000		153,761
Ruentex Development Co., Ltd.(a)		75,000		89,849
Ruentex Industries, Ltd.		57,000		91,673
Shin Kong Financial Holding Co., Ltd.(a)		791,000		230,711
Siliconware Precision Industries Co., Ltd.		207,000		337,695
SinoPac Financial Holdings Co., Ltd.		972,050		303,380
Standard Foods Corp.		40,300		100,144
Synnex Technology International Corp.		133,700		143,868
TaiMed Biologics, Inc.(a)		15,000		87,995
Taishin Financial Holding Co., Ltd.		821,535		342,504
Taiwan Business Bank		377,200		104,424
Taiwan Cement Corp.		329,000		393,596
Taiwan Cooperative Financial Holding Co., Ltd.		737,850		367,192
Taiwan Fertilizer Co., Ltd.		66,000		91,357
Taiwan Mobile Co., Ltd.		156,000		573,255
Taiwan Semiconductor Manufacturing Co., Ltd.		2,398,000		14,936,871
Teco Electric and Machinery Co., Ltd.		189,000		192,161
Transcend Information, Inc.		20,000		65,519
Uni-President Enterprises Corp.		466,000		873,870
United Microelectronics Corp.		1,173,000		471,635
Vanguard International Semiconductor Corp.		84,000		160,013
Wistron Corp.		248,863		228,010
WPG Holdings, Ltd.		146,000		183,327
Yuanta Financial Holding Co., Ltd.		949,000		400,336
Yulon Motor Co., Ltd.		89,000		82,862
Zhen Ding Technology Holding, Ltd.		40,000		93,994
				52,314,579

See accompanying notes to schedules of investments.

102

State Street Institutional Investment Trust

State Street Emerging Markets Equity Index Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Thailand – 2.2%
Advanced Info Service PCL		101,400	$	525,259
Airports of Thailand PCL		412,400		471,057
Bangkok Bank PCL		12,400		67,120
Bangkok Bank PCL NVDR		11,400		60,214
Bangkok Dusit Medical Services PCL		381,200		235,182
Bangkok Expressway & Metro PCL		694,199		153,537
Banpu PCL		197,400		113,744
BEC World PCL		97,800		49,523
Berli Jucker PCL		115,400		156,161
BTS Group Holdings PCL		589,384		144,934
Bumrungrad Hospital PCL		36,000		191,721
Central Pattana PCL		131,800		217,669
Charoen Pokphand Foods PCL		268,500		216,831
CP ALL PCL		482,500		828,447
Delta Electronics Thailand PCL		47,200		120,189
Electricity Generating PCL		11,900		74,110
Energy Absolute PCL		100,200		80,918
Glow Energy PCL		49,000		117,643
Home Product Center PCL		378,600		106,322
Indorama Ventures PCL		136,400		139,923
IRPC PCL		950,200		142,409
Kasikornbank PCL		158,300		870,679
Kasikornbank PCL NVDR		8,600		47,301
KCE Electronics PCL		29,100		88,496
Krung Thai Bank PCL		355,800		211,228
Minor International PCL		213,200		228,013
PTT Exploration & Production PCL		137,700		372,677
PTT Global Chemical PCL		204,000		434,864
PTT PCL		97,000		1,092,441
Robinson Department Store PCL		47,300		88,096
Siam Cement PCL		39,150		615,235
Siam Commercial Bank PCL		171,700		814,466
Thai Oil PCL		78,800		173,136
Thai Union Group PCL		182,700		113,780
TMB Bank PCL		1,184,300		84,094
True Corp. PCL		992,737		196,453
				9,643,872
Turkey – 1.0%
Akbank TAS		211,442		495,270
Anadolu Efes Biracilik Ve Malt Sanayii A/S		18,700		101,725
Arcelik A/S		23,890		148,654
BIM Birlesik Magazalar A/S		20,223		310,427
Coca-Cola Icecek A/S		6,886		67,392
Emlak Konut Gayrimenkul Yatirim Ortakligi A/S		174,919		139,295
Eregli Demir ve Celik Fabrikalari TAS		138,482		224,361
Ford Otomotiv Sanayi A/S		7,319		71,549
Haci Omer Sabanci Holding A/S		88,874		244,049
KOC Holding A/S		61,290		258,345
Petkim Petrokimya Holding A/S		60,908		84,798
TAV Havalimanlari Holding A/S		17,198		68,430
Tofas Turk Otomobil Fabrikasi A/S		12,158		90,877
Tupras Turkiye Petrol Rafinerileri A/S		12,078		299,160
Turk Hava Yollari AO(a)		53,467		80,311
Turk Telekomunikasyon A/S		54,130		87,698
Turkcell Iletisim Hizmetleri A/S(a)		84,550		277,913
Turkiye Garanti Bankasi A/S		221,874		539,811
Turkiye Halk Bankasi A/S		62,296		177,395
Turkiye Is Bankasi Class C		153,105		278,744
Turkiye Sise ve Cam Fabrikalari A/S		72,284		82,771
Turkiye Vakiflar Bankasi TAO Class D		71,797		105,675
Ulker Biskuvi Sanayi A/S		14,465		73,325
Yapi ve Kredi Bankasi A/S(a)		83,552		87,185
				4,395,160
United Arab Emirates – 0.7%
Abu Dhabi Commercial Bank PJSC		194,034		359,224
Aldar Properties PJSC		312,074		192,019
DP World, Ltd.		15,941		342,732
Dubai Islamic Bank PJSC		120,202		183,265
DXB Entertainments PJSC(a)		280,045		77,769
Emaar Malls PJSC		196,771		141,431
Emaar Properties PJSC		341,413		678,550
Emirates Telecommunications Group Co. PJSC		169,840		834,634
First Gulf Bank PJSC		86,391		303,415
National Bank of Abu Dhabi PJSC		66,655		186,010
				3,299,049
TOTAL COMMON STOCKS (Cost $360,126,141)				426,568,644
RIGHTS – 0.0%(e)
Qatar – 0.0%(e)
Doha Bank QSC (expiring 5/9/17)(a)		2,558		4,496
South Africa – 0.0%(e)
Life Healthcare Group Holdings, Ltd. (expiring 4/13/17)(a)		33,171		11,132
TOTAL RIGHTS (Cost $0)				15,628
SHORT-TERM INVESTMENT – 2.5%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(f)(g) (Cost $10,989,865)		10,989,865		10,989,865
TOTAL INVESTMENTS – 99.3% (Cost $371,116,006)				437,574,137
Other Assets in Excess of Liabilities – 0.7%				3,167,811
NET ASSETS – 100.0%			$	440,741,948

See accompanying notes to schedules of investments.

103

State Street Institutional Investment Trust

State Street Emerging Markets Equity Index Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

^(a) Non-income producing security.

^(b) Securities purchased pursuant to Rule 144A of the Securities Act of 1933. These securities, which represent 0.3% of net assets as of March 31, 2017, are considered liquid and may be resold in transactions exempt from registration, normally to qualified institutional buyers.

^(c)  Fair valued as determined in good faith by the Trust’s Oversight Committee in accordance with policy and procedures approved by the Board of Trustees. As of March 31, 2017, total aggregate fair value of the security is $21,947, representing 0.0% of the Fund’s net assets.

^(d) Reflects separate holdings of the issuer’s common stock traded on different securities exchanges.

^(e) Amount is less than 0.05% of net assets.

^(f) The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(g)  The rate shown is the annualized seven-day yield at March 31, 2017.

ADR	American Depositary Receipt
GDR	Global Depositary Receipt
NVDR	Non Voting Depositary Receipt
REIT	Real Estate Investment Trust

At March 31, 2017, open futures contracts purchased were as follows:

Futures Contracts	Expiration Date		Number of Contracts		Notional Value		Unrealized Appreciation
Mini MSCI Emerging Markets Index (long)		06/16/2017		279	$	13,411,530	$	373,873

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Common Stocks
Brazil	$	32,383,856	$	–	$	–	$	32,383,856
Chile		5,325,335		–		–		5,325,335
China		112,525,253		21,947		–		112,547,200
Colombia		1,859,849		–		–		1,859,849
Czech Republic		775,801		–		–		775,801
Egypt		545,016		–		–		545,016
Greece		1,369,629		–		–		1,369,629
Hong Kong		2,124,141		–		–		2,124,141
Hungary		1,199,941		–		–		1,199,941
India		37,727,248		–		–		37,727,248
Indonesia		10,694,335		–		–		10,694,335
Malaysia		10,413,185		–		–		10,413,185
Mexico		15,727,315		–		–		15,727,315
Netherlands		1,392,576		–		–		1,392,576
Peru		1,593,634		–		–		1,593,634
Philippines		4,914,948		–		–		4,914,948
Poland		5,176,086		–		–		5,176,086
Qatar		3,438,715		–		–		3,438,715
Romania		236,392		–		–		236,392
Russia		16,505,134		–		–		16,505,134
South Africa		26,648,808		–		–		26,648,808
South Korea		64,316,840		–		–		64,316,840
Taiwan		52,314,579		–		–		52,314,579
Thailand		1,660,549		7,983,323		–		9,643,872
Turkey		4,395,160		–		–		4,395,160
United Arab Emirates		3,299,049		–		–		3,299,049

See accompanying notes to schedules of investments.

104

State Street Institutional Investment Trust

State Street Emerging Markets Equity Index Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Rights
Qatar	$	–	$	4,496	$	–	$	4,496
South Africa		11,132		–		–		11,132
Short-Term Investment		10,989,865		–		–		10,989,865
Total Investments	$	429,564,371	$	8,009,766	$	–	$	437,574,137
Other Financial Instruments:
Futures Contracts(a)		373,873		–		–		373,873
Total Investments and Other Financial Instruments	$	429,938,244	$	8,009,766	$	–	$	437,948,010

^(a)  Futures Contracts are valued at unrealized appreciation (depreciation).

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income
State Street Institutional U.S. Government Money Market Fund, Premier Class		7,130,539	$	7,130,539		19,285,668		15,426,342		10,989,865	$	10,989,865	$	12,687
TOTAL			$	7,130,539							$	10,989,865	$	12,687

See accompanying notes to schedules of investments.

105

State Street Hedged International Developed Equity Index Fund is a feeder fund that invests substantially all of its investable assets in a master fund, the State Street International Developed Equity Index Portfolio, a separate series of State Street Master Funds. The portfolio of investments for the State Street International Developed Equity Index Portfolio follows the portfolio of investments for the State Street Hedged International Developed Equity Index Fund.

State Street Institutional Investment Trust

State Street Hedged International Developed Equity Index Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
MUTUAL FUND AND EXCHANGE TRADED PRODUCTS – 97.4%
State Street International Developed Equity Index Portfolio (a) (Cost $2,213,027,727)			$	2,305,592,739
SHORT-TERM INVESTMENT – 2.2%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62% (b)(c) (Cost $52,329,163)		52,329,163		52,329,163
TOTAL INVESTMENTS – 99.6% (Cost $2,265,356,890)				2,357,921,902
Other Assets In Excess Of Liabilities – 0.4%				8,581,592
NET ASSETS – 100.0%			$	2,366,503,494

^(a)  Affiliated fund managed by SSGA Funds Management, Inc.

^(b)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(c)  The rate shown is the annualized seven-day yield at March 31, 2017.

At March 31, 2017, open forward foreign currency exchange contracts were as follows:

Counterparty	Amount Sold			Amount Bought			Settlement Date		Net Unrealized Appreciation/ (Depreciation)
BNP Paribas SA		USD	279,847,095		JPY	31,183,361,805		04/04/2017	$	–
BNP Paribas SA		USD	65,966,369		SEK	588,967,531		04/04/2017		–
BNP Paribas SA		USD	37,287,773		DKK	259,252,566		04/04/2017		–
BNP Paribas SA		USD	29,608,745		SGD	41,372,299		04/04/2017		–
BNP Paribas SA		USD	15,495,985		ILS	56,258,174		04/04/2017		–
BNP Paribas SA		USD	14,141,569		NOK	121,460,520		04/04/2017		–
BNP Paribas SA		USD	3,917,183		NZD	5,603,581		04/04/2017		–
BNP Paribas SA		AUD	606,000		USD	467,480		04/04/2017		5,193
BNP Paribas SA		EUR	3,361,000		USD	3,564,485		04/04/2017		(30,272	)
BNP Paribas SA		NZD	5,603,581		USD	4,048,559		04/04/2017		131,376
BNP Paribas SA		NOK	121,460,520		USD	14,536,856		04/04/2017		395,287
BNP Paribas SA		ILS	55,211,174		USD	15,177,912		04/04/2017		(29,683	)
BNP Paribas SA		SGD	39,994,299		USD	28,601,065		04/04/2017		(21,492	)
BNP Paribas SA		DKK	248,149,566		USD	35,532,678		04/04/2017		(158,173	)
BNP Paribas SA		SEK	553,259,531		USD	61,533,105		04/04/2017		(433,846	)
BNP Paribas SA		JPY	30,655,170,305		USD	274,375,668		04/04/2017		(731,307	)
BNP Paribas SA		NOK	6,511,000		USD	758,326		05/03/2017		24
BNP Paribas SA		DKK	7,670,000		USD	1,104,748		05/03/2017		26
BNP Paribas SA		SEK	15,945,000		USD	1,788,357		05/03/2017		34
BNP Paribas SA		NZD	5,603,581		USD	3,914,213		05/03/2017		(43	)
BNP Paribas SA		CHF	4,400,000		USD	4,402,818		05/03/2017		(316	)
BNP Paribas SA		NOK	121,460,520		USD	14,145,686		05/03/2017		(186	)
BNP Paribas SA		ILS	56,258,174		USD	15,508,801		05/03/2017		(1,016	)
BNP Paribas SA		SGD	41,372,299		USD	29,611,924		05/03/2017		(3,364	)
BNP Paribas SA		DKK	259,252,566		USD	37,338,792		05/03/2017		(1,737	)
BNP Paribas SA		SEK	588,967,531		USD	66,051,446		05/03/2017		(4,628	)
BNP Paribas SA		JPY	31,183,361,805		USD	280,180,254		05/08/2017		(8,811	)
Bank of America		AUD	219,262,050		USD	168,449,166		04/04/2017		1,185,150

See accompanying notes to schedules of investments.

106

State Street Institutional Investment Trust

State Street Hedged International Developed Equity Index Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Counterparty	Amount Sold			Amount Bought			Settlement Date		Net Unrealized Appreciation/ (Depreciation)
Bank of America		JPY	30,655,170,305		USD	274,375,668		04/04/2017	$	(731,307	)
Barclays Bank PLC		CHF	773,000		USD	776,372		04/04/2017		4,105
Barclays Bank PLC		HKD	2,352,000		USD	302,995		04/05/2017		342
Citibank N.A.		USD	207,570,040		GBP	165,996,273		04/04/2017		27
Citibank N.A.		USD	1,863,018		EUR	1,748,000		04/04/2017		6,554
Citibank N.A.		USD	1,491,979		JPY	166,102,000		04/04/2017		(1,339	)
Citibank N.A.		USD	1,107,387		GBP	884,000		04/04/2017		(1,989	)
Citibank N.A.		USD	534,823		CHF	536,000		04/04/2017		668
Citibank N.A.		USD	464,147		AUD	608,000		04/04/2017		(335	)
Citibank N.A.		ILS	1,047,000		USD	287,807		04/04/2017		(583	)
Citibank N.A.		AUD	608,000		USD	466,206		04/04/2017		2,393
Citibank N.A.		CHF	536,000		USD	537,692		04/04/2017		2,200
Citibank N.A.		SGD	1,378,000		USD	985,475		04/04/2017		(712	)
Citibank N.A.		CHF	1,043,000		USD	1,031,196		04/04/2017		(10,814	)
Citibank N.A.		GBP	884,000		USD	1,103,871		04/04/2017		(1,527	)
Citibank N.A.		JPY	166,102,000		USD	1,491,888		04/04/2017		1,248
Citibank N.A.		EUR	1,748,000		USD	1,875,153		04/04/2017		5,580
Citibank N.A.		GBP	1,720,000		USD	2,110,543		04/04/2017		(40,231	)
Citibank N.A.		EUR	3,401,000		USD	3,578,355		04/04/2017		(59,183	)
Citibank N.A.		GBP	158,251,773		USD	197,090,240		04/04/2017		(795,716	)
Citibank N.A.		USD	78,200,995		HKD	607,739,035		04/05/2017		2,099
Citibank N.A.		HKD	16,808,000		USD	2,166,326		04/05/2017		3,493
Citibank N.A.		HKD	579,101,035		USD	74,634,020		04/05/2017		116,028
Citibank N.A.		AUD	608,000		USD	463,874		05/03/2017		296
Citibank N.A.		CHF	536,000		USD	535,679		05/03/2017		(703	)
Citibank N.A.		GBP	884,000		USD	1,108,094		05/03/2017		1,936
Citibank N.A.		EUR	1,748,000		USD	1,865,291		05/03/2017		(6,714	)
Citibank N.A.		GBP	165,996,273		USD	207,703,667		05/03/2017		(9,154	)
Citibank N.A.		HKD	607,739,035		USD	78,250,837		05/04/2017		(7,053	)
Citibank N.A.		JPY	166,102,000		USD	1,493,656		05/08/2017		1,194
Credit Suisse International		SEK	2,280,000		USD	258,489		04/04/2017		3,122
Credit Suisse International		GBP	880,000		USD	1,099,808		04/04/2017		(588	)
Credit Suisse International		EUR	2,521,000		USD	2,713,499		04/04/2017		17,164
Goldman Sachs Bank USA		SEK	3,075,000		USD	339,322		04/04/2017		(5,089	)
Goldman Sachs Bank USA		AUD	1,184,000		USD	895,637		04/04/2017		(7,577	)
Goldman Sachs Bank USA		DKK	11,103,000		USD	1,589,768		04/04/2017		(7,154	)
Goldman Sachs Bank USA		SEK	24,243,000		USD	2,696,603		04/04/2017		(18,696	)
HSBC Bank USA		CHF	559,000		USD	556,060		04/04/2017		(2,410	)
HSBC Bank USA		EUR	1,742,000		USD	1,885,246		04/04/2017		22,091
HSBC Bank USA		GBP	1,700,000		USD	2,083,814		04/04/2017		(41,951	)
JP Morgan Chase Bank, N.A.		USD	5,691,055		JPY	635,709,000		04/04/2017		13,953
JP Morgan Chase Bank, N.A.		SEK	3,071,000		USD	340,834		04/04/2017		(3,128	)
JP Morgan Chase Bank, N.A.		CHF	534,000		USD	538,621		04/04/2017		5,128
JP Morgan Chase Bank, N.A.		AUD	877,000		USD	677,948		04/04/2017		8,929
JP Morgan Chase Bank, N.A.		CHF	1,042,000		USD	1,039,877		04/04/2017		(1,134	)
JP Morgan Chase Bank, N.A.		GBP	921,000		USD	1,127,769		04/04/2017		(23,895	)
JP Morgan Chase Bank, N.A.		JPY	173,112,000		USD	1,511,708		04/04/2017		(41,842	)
JP Morgan Chase Bank, N.A.		EUR	1,822,000		USD	1,946,319		04/04/2017		(2,401	)
JP Morgan Chase Bank, N.A.		GBP	1,717,000		USD	2,132,135		04/04/2017		(14,888	)
Morgan Stanley Bank, N.A.		USD	174,328,809		AUD	228,523,050		04/04/2017		(40	)
Morgan Stanley Bank, N.A.		SEK	3,039,000		USD	337,664		04/04/2017		(2,714	)
Morgan Stanley Bank, N.A.		AUD	3,063,000		USD	2,353,358		04/04/2017		16,749
Morgan Stanley Bank, N.A.		HKD	3,136,000		USD	404,095		04/05/2017		559
Morgan Stanley Bank, N.A.		AUD	228,523,050		USD	174,239,228		05/03/2017		(1,111	)
Royal Bank of Canada		USD	351,076,747		EUR	328,247,157		04/04/2017		(131	)
Royal Bank of Canada		CHF	5,017,000		USD	5,020,057		04/04/2017		7,819
Royal Bank of Canada		EUR	313,519,657		USD	333,649,500		04/04/2017		(1,675,324	)
Royal Bank of Canada		GBP	5,552,000		USD	6,946,762		05/03/2017		(512	)
Royal Bank of Canada		EUR	34,356,000		USD	36,794,177		05/03/2017		932
Royal Bank of Canada		EUR	328,247,157		USD	351,520,865		05/03/2017		(12,427	)

See accompanying notes to schedules of investments.

107

State Street Institutional Investment Trust

State Street Hedged International Developed Equity Index Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Counterparty	Amount Sold			Amount Bought			Settlement Date		Net Unrealized Appreciation/ (Depreciation)
Societe Generale		USD	351,076,747		EUR	328,247,157		04/04/2017	$	(131	)
Societe Generale		AUD	1,182,000		USD	905,766		04/04/2017		4,078
Societe Generale		JPY	322,693,000		USD	2,881,437		04/04/2017		(14,489	)
Societe Generale		GBP	6,485,000		USD	8,077,055		04/04/2017		(32,115	)
Societe Generale		EUR	313,519,657		USD	333,648,560		04/04/2017		(1,676,265	)
Societe Generale		HKD	3,169,000		USD	408,400		04/05/2017		617
Societe Generale		EUR	328,247,157		USD	351,519,880		05/03/2017		(13,412	)
Standard Chartered Bank		AUD	634,000		USD	480,641		04/04/2017		(3,006	)
Standard Chartered Bank		AUD	1,170,000		USD	887,163		04/04/2017		(5,371	)
Standard Chartered Bank		CHF	1,031,000		USD	1,021,087		04/04/2017		(8,934	)
Standard Chartered Bank		JPY	165,494,000		USD	1,480,077		04/04/2017		(5,107	)
Standard Chartered Bank		JPY	239,573,000		USD	2,129,754		04/04/2017		(20,233	)
Standard Chartered Bank		JPY	319,351,000		USD	2,807,222		04/04/2017		(58,712	)
Standard Chartered Bank		EUR	3,396,000		USD	3,604,256		04/04/2017		(27,934	)
Toronto Dominion Bank		USD	201,278,357		CHF	201,469,571		04/04/2017		–
Toronto Dominion Bank		GBP	1,275,000		USD	1,577,774		04/04/2017		(16,550	)
Toronto Dominion Bank		CHF	190,990,571		USD	191,071,394		04/04/2017		262,092
Toronto Dominion Bank		CHF	201,469,571		USD	201,598,796		05/03/2017		(14,271	)
UBS AG		USD	279,847,095		JPY	31,183,361,805		04/04/2017		–
UBS AG		AUD	545,000		USD	413,816		04/04/2017		(1,937	)
UBS AG		CHF	480,000		USD	476,709		04/04/2017		(2,836	)
UBS AG		GBP	791,000		USD	966,725		04/04/2017		(22,381	)
UBS AG		JPY	148,737,000		USD	1,299,171		04/04/2017		(35,631	)
UBS AG		EUR	1,565,000		USD	1,666,390		04/04/2017		(7,455	)
UBS AG		JPY	323,132,000		USD	2,825,529		04/04/2017		(74,337	)
UBS AG		HKD	3,173,000		USD	408,906		04/05/2017		609
UBS AG		AUD	7,214,000		USD	5,500,098		05/03/2017		(309	)
UBS AG		JPY	31,183,361,805		USD	280,170,185		05/08/2017		(18,880	)
Westpac Banking Corp.		USD	207,570,041		GBP	165,996,274		04/04/2017		27
Westpac Banking Corp.		EUR	11,647,000		USD	12,395,611		04/04/2017		(61,433	)
Westpac Banking Corp.		GBP	158,251,774		USD	197,094,197		04/04/2017		(791,759	)
Westpac Banking Corp.		ILS	1,412,000		USD	389,298		05/03/2017		24
Westpac Banking Corp.		SGD	2,222,000		USD	1,590,397		05/03/2017		(164	)
Westpac Banking Corp.		GBP	165,996,274		USD	207,708,648		05/03/2017		(4,174	)
Westpac Banking Corp.		HKD	36,825,000		USD	4,741,915		05/04/2017		–
Westpac Banking Corp.		USD	5,832,295		JPY	649,054,000		05/08/2017		(409	)
Total									$	(5,644,335	)

At March 31, 2017, open futures contracts purchased were as follows:

Futures Contracts	Expiration Date	Number of Contracts	Notional Value	Unrealized Appreciation
Mini MSCI EAFE (long)	06/16/2017	577	$51,410,700	$851,386

AUD	Australian dollar
CHF	Swiss franc
DKK	Danish krone
EUR	Euro
GBP	British pound
HKD	Hong Kong dollar
ILS	Israeli New shekel
JPY	Japanese yen
NOK	Norwegian krone
NZD	New Zealand dollar
SEK	Swedish krona
SGD	Singapore dollar
USD	U.S. dollar

See accompanying notes to schedules of investments.

108

State Street Institutional Investment Trust

State Street Hedged International Developed Equity Index Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs			Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Mutual Fund and Exchange Traded Products
United States	$	2,305,592,739	$	–		$	–	$	2,305,592,739
Short-Term Investment		52,329,163		–			–		52,329,163
Total Investments	$	2,357,921,902	$	–		$	–	$	2,357,921,902
Other Financial Instruments:
Forward Foreign Currency Exchange Contracts (a)		–		2,229,146			–		2,229,146
Futures Contracts (b)		851,386		–			–		851,386
Total Investments And Other Financial Instruments	$	2,358,773,288	$	2,229,146		$	–	$	2,361,002,434
Liabilities:
Other Financial Instruments:
Forward Foreign Currency Exchange Contracts (a)	$	–	$	(7,873,481	)	$	–	$	(7,873,481	)
Total Other Financial Instruments	$	–	$	(7,873,481	)	$	–	$	(7,873,481	)

^(a) Forward Foreign Currency Exchange Contracts are valued at unrealized appreciation (depreciation).

^(b) Futures Contracts are valued at unrealized appreciation (depreciation).

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income
State Street Institutional U.S. Government Money Market Fund, Premier Class		90,100,871	$	90,100,871		26,756,386		64,528,094		52,329,163	$	52,329,163	$	68,460
TOTAL			$	90,100,871							$	52,329,163	$	68,460

See accompanying notes to schedules of investments.

109

State Street Master Funds

State Street International Developed Equity Index Portfolio

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – 97.7%
Australia – 7.5%
AGL Energy, Ltd.		113,880	$	2,290,850
Alumina, Ltd.		419,565		572,917
Amcor, Ltd.		202,130		2,322,174
AMP, Ltd.		532,462		2,104,057
APA Group		191,268		1,307,342
Aristocrat Leisure, Ltd.		98,993		1,357,037
ASX, Ltd.		32,633		1,256,653
Aurizon Holdings, Ltd.		353,698		1,416,547
AusNet Services		348,352		447,772
Australia & New Zealand Banking Group, Ltd.		507,747		12,324,990
Bank of Queensland, Ltd.		66,249		614,543
Bendigo & Adelaide Bank, Ltd.		79,115		732,684
BHP Billiton PLC		365,322		5,637,121
BHP Billiton, Ltd.		557,654		10,226,766
Boral, Ltd.		205,051		913,511
Brambles, Ltd.		266,133		1,898,232
Caltex Australia, Ltd.		45,538		1,024,443
Challenger, Ltd.		92,804		888,484
CIMIC Group, Ltd.		18,465		506,111
Coca-Cola Amatil, Ltd.		92,076		759,999
Cochlear, Ltd.		10,235		1,055,844
Commonwealth Bank of Australia		298,070		19,534,443
Computershare, Ltd.		77,865		835,154
Crown Resorts, Ltd.		72,799		655,865
CSL, Ltd.		78,657		7,520,236
Dexus Property Group REIT		167,364		1,247,371
Domino’s Pizza Enterprises, Ltd.		10,034		444,876
DUET Group		439,712		935,861
Flight Centre Travel Group, Ltd.		12,119		266,995
Fortescue Metals Group, Ltd.		278,858		1,325,288
Goodman Group REIT		316,961		1,871,483
GPT Group REIT		304,306		1,195,520
Harvey Norman Holdings, Ltd.		107,605		371,852
Healthscope, Ltd.		281,376		487,250
Incitec Pivot, Ltd.		273,735		785,158
Insurance Australia Group, Ltd.		411,703		1,900,109
LendLease Group		98,023		1,165,023
Macquarie Group, Ltd.		52,573		3,617,498
Medibank Pvt, Ltd.		489,758		1,053,585
Mirvac Group REIT		650,968		1,087,534
National Australia Bank, Ltd.		461,102		11,727,398
Newcrest Mining, Ltd.		129,446		2,199,115
Oil Search, Ltd.		231,227		1,273,546
Orica, Ltd.		67,209		902,359
Origin Energy, Ltd.		319,729		1,719,532
Qantas Airways, Ltd.		64,362		190,993
QBE Insurance Group, Ltd.		230,830		2,269,782
Ramsay Health Care, Ltd.		23,413		1,248,278
REA Group, Ltd.		9,620		435,400
Santos, Ltd.		314,465		911,580
Scentre Group REIT		929,908		3,043,241
SEEK, Ltd.		54,873		666,409
Sonic Healthcare, Ltd.		67,055		1,131,502
South32, Ltd.		896,132		1,886,775
Stockland REIT		406,259		1,438,004
Suncorp Group, Ltd.		224,319		2,260,518
Sydney Airport		197,974		1,022,435
Tabcorp Holdings, Ltd.		144,764		524,558
Tatts Group, Ltd.		237,214		801,647
Telstra Corp., Ltd.		713,908		2,537,857
TPG Telecom, Ltd.		56,237		299,016
Transurban Group Stapled Security		362,178		3,224,274
Treasury Wine Estates, Ltd.		134,469		1,254,549
Vicinity Centres REIT		576,936		1,245,527
Vocus Group, Ltd.		84,519		278,533
Wesfarmers, Ltd.		195,001		6,704,455
Westfield Corp.		331,142		2,243,191
Westpac Banking Corp.		579,499		15,498,999
Woodside Petroleum, Ltd.		132,221		3,235,742
Woolworths, Ltd.		218,601		4,419,133
				172,553,526
Austria – 0.2%
ANDRITZ AG		14,225		713,324
Erste Group Bank AG		54,596		1,782,450
OMV AG		27,659		1,091,157
Raiffeisen Bank International AG(a)		23,935		541,561
Voestalpine AG		21,677		855,513
				4,984,005
Belgium – 1.1%
Ageas		35,808		1,403,255
Anheuser-Busch InBev SA		131,995		14,526,928
Colruyt SA		11,037		543,249
Groupe Bruxelles Lambert SA		14,003		1,274,534
KBC Group NV		42,997		2,859,958
Proximus SADP		27,216		856,237
Solvay SA		13,514		1,655,693
Telenet Group Holding NV(a)		9,109		543,146
UCB SA		22,934		1,783,507
Umicore SA		16,732		955,631
				26,402,138
Chile – 0.0%(b)
Antofagasta PLC		67,870		708,224
China – 0.0%(b)
Yangzijiang Shipbuilding Holdings, Ltd.		386,100		312,240
Denmark – 1.6%
AP Moeller – Maersk A/S Class A		701		1,134,263
AP Moeller – Maersk A/S Class B		1,116		1,857,124
Carlsberg A/S Class B		18,366		1,701,155
Chr Hansen Holding A/S		17,535		1,128,858
Coloplast A/S Class B		20,207		1,582,498
Danske Bank A/S		119,616		4,085,980
DONG Energy A/S(c)		26,007		1,005,830
DSV A/S		33,781		1,753,974
Genmab A/S(a)		9,759		1,885,058
ISS A/S		29,588		1,122,197
Novo Nordisk A/S Class B		331,811		11,429,828
Novozymes A/S Class B		41,998		1,669,591

See accompanying notes to schedules of investments.

110

State Street Master Funds

State Street International Developed Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Denmark – (continued)
Pandora A/S		19,146	$	2,125,880
TDC A/S		156,700		810,461
Tryg A/S		20,264		368,688
Vestas Wind Systems A/S		37,917		3,092,149
William Demant Holding A/S(a)		21,003		440,133
				37,193,667
Finland – 0.9%
Elisa Oyj		25,700		911,208
Fortum Oyj		75,813		1,202,502
Kone Oyj Class B		56,003		2,465,401
Metso Oyj		17,839		541,482
Neste Oyj		23,194		906,949
Nokia Oyj(d)		988,382		5,317,655
Nokian Renkaat Oyj		20,335		851,267
Orion Oyj Class B		18,821		983,753
Sampo Oyj Class A		76,940		3,658,664
Stora Enso Oyj Class R		94,838		1,123,888
UPM-Kymmene Oyj		90,876		2,140,265
Wartsila Oyj Abp		25,644		1,375,491
				21,478,525
France – 9.7%
Accor SA		31,145		1,300,799
Aeroports de Paris		5,090		630,688
Air Liquide SA		67,853		7,772,477
Airbus SE		99,820		7,615,365
Alstom SA(a)		24,765		742,044
Arkema SA		11,794		1,166,568
Atos SE		15,451		1,916,145
AXA SA		338,056		8,769,824
BNP Paribas SA		182,992		12,218,738
Bollore SA(d)		143,645		558,311
Bollore SA(a)(d)		677		2,578
Bouygues SA		35,739		1,458,461
Bureau Veritas SA		49,249		1,041,633
Cap Gemini SA		28,341		2,623,816
Carrefour SA		98,517		2,328,651
Casino Guichard Perrachon SA		9,801		549,606
Christian Dior SE		9,205		2,144,285
Cie de Saint-Gobain		86,493		4,452,899
Cie Generale des Etablissements Michelin		31,517		3,837,769
CNP Assurances		29,292		597,762
Credit Agricole SA		195,157		2,650,872
Danone SA		101,921		6,950,450
Dassault Aviation SA		384		489,522
Dassault Systemes SE		22,877		1,985,341
Edenred		40,107		950,156
Eiffage SA		11,301		887,426
Electricite de France SA		57,150		482,397
Engie SA		274,892		3,904,461
Essilor International SA		35,586		4,335,147
Eurazeo SA		7,199		475,302
Eutelsat Communications SA		29,017		649,565
Fonciere Des Regions		5,920		495,838
Gecina SA REIT		7,428		1,010,555
Groupe Eurotunnel SE		73,525		741,720
Hermes International		4,436		2,107,042
ICADE		6,016		441,915
Iliad SA		4,881		1,094,472
Imerys SA		6,262		532,922
Ingenico Group SA		9,802		927,390
JCDecaux SA		12,680		447,407
Kering		12,997		3,370,282
Klepierre REIT		37,613		1,466,748
L’Oreal SA		43,917		8,461,899
Lagardere SCA		20,176		595,803
Legrand SA		46,077		2,785,398
LVMH Moet Hennessy Louis Vuitton SE		48,214		10,615,121
Natixis SA		151,944		938,667
Orange SA		349,807		5,449,290
Pernod Ricard SA		36,458		4,324,395
Peugeot SA(a)		88,239		1,781,347
Publicis Groupe SA		33,849		2,371,671
Remy Cointreau SA		4,070		399,481
Renault SA		33,000		2,874,083
Rexel SA		57,244		1,042,055
Safran SA		53,742		4,025,306
Sanofi		201,163		18,206,315
Schneider Electric SE		97,054		7,124,073
SCOR SE		30,300		1,148,193
SEB SA		3,738		523,335
SFR Group SA(a)		18,549		585,054
Societe BIC SA		4,605		575,272
Societe Generale SA		132,509		6,739,021
Sodexo SA		15,650		1,845,414
Suez Environment Co.		60,877		963,968
Thales SA		17,948		1,740,334
TOTAL SA		389,773		19,766,439
Unibail-Rodamco SE		17,077		4,001,795
Valeo SA		42,633		2,846,690
Veolia Environnement SA		83,809		1,574,041
Vinci SA		87,534		6,956,111
Vivendi SA		179,432		3,497,586
Wendel SA		4,850		616,253
Zodiac Aerospace		32,539		816,109
				223,315,868
Germany – 9.2%
adidas AG		32,799		6,254,792
Allianz SE		79,313		14,730,588
Axel Springer SE		8,400		465,113
BASF SE		159,337		15,835,317
Bayer AG		143,418		16,574,077
Bayerische Motoren Werke AG		57,097		5,221,931
Bayerische Motoren Werke AG Preference Shares		8,795		694,402
Beiersdorf AG		17,230		1,635,147
Brenntag AG		25,724		1,445,813
Commerzbank AG		193,105		1,751,007
Continental AG		18,914		4,157,154
Covestro AG(c)		16,301		1,258,090
Daimler AG		166,564		12,327,873
Deutsche Bank AG(a)		236,302		4,081,698
Deutsche Boerse AG(a)		33,629		3,090,001
Deutsche Lufthansa AG		40,148		652,692
Deutsche Post AG		167,143		5,739,338
Deutsche Telekom AG		569,811		10,010,071

See accompanying notes to schedules of investments.

111

State Street Master Funds

State Street International Developed Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Germany – (continued)
Deutsche Wohnen AG		61,166	$	2,019,190
E.ON SE		391,093		3,116,704
Evonik Industries AG		27,051		884,318
Fraport AG Frankfurt Airport Services Worldwide		6,934		491,920
Fresenius Medical Care AG & Co. KGaA		36,900		3,119,817
Fresenius SE & Co. KGaA		71,570		5,766,336
Fuchs Petrolub SE Preference Shares		11,891		581,595
GEA Group AG		30,765		1,310,923
Hannover Rueck SE		10,426		1,205,994
HeidelbergCement AG		25,834		2,424,874
Henkel AG & Co. KGaA		17,691		1,970,664
Henkel AG & Co. KGaA Preference Shares		30,632		3,934,769
HOCHTIEF AG		3,385		560,985
HUGO BOSS AG		12,793		936,037
Infineon Technologies AG		195,022		3,993,373
Innogy SE(a)(c)		24,532		928,438
KS AG		35,264		821,845
Lanxess AG		16,645		1,119,609
Linde AG		32,024		5,346,621
MAN SE		5,739		593,129
Merck KGaA		23,098		2,638,436
METRO AG		33,622		1,078,093
Muenchener Rueckversicherungs-Gesellschaft AG in Muenchen		27,757		5,444,685
OSRAM Licht AG		16,817		1,056,714
Porsche Automobil Holding SE Preference Shares		26,200		1,433,055
ProSiebenSat.1 Media SE		39,704		1,762,526
RWE AG(a)		84,794		1,408,891
SAP SE		170,442		16,767,602
Schaeffler AG, Preference Shares		27,293		481,071
Siemens AG		132,077		18,138,157
Symrise AG		20,690		1,379,521
Telefonica Deutschland Holding AG		123,988		616,643
ThyssenKrupp AG		65,285		1,603,195
TUI AG		83,995		1,161,649
United Internet AG		23,007		1,020,704
Volkswagen AG Preference Shares		32,620		4,765,798
Volkswagen AG		5,948		888,409
Vonovia SE		81,245		2,870,160
Zalando SE(a)(c)		14,199		575,949
				212,143,503
Hong Kong – 3.4%
AIA Group, Ltd.		2,072,000		13,064,145
ASM Pacific Technology, Ltd.		41,900		569,881
Bank of East Asia, Ltd.		215,545		891,690
BOC Hong Kong Holdings, Ltd.		625,500		2,555,443
Cathay Pacific Airways, Ltd.		209,000		303,355
Cheung Kong Infrastructure Holdings, Ltd.		115,000		902,657
Cheung Kong Property Holdings, Ltd.		470,179		3,167,197
CK Hutchison Holdings, Ltd.		459,000		5,646,323
CLP Holdings, Ltd.		287,500		3,005,774
First Pacific Co., Ltd.		314,000		227,879
Galaxy Entertainment Group, Ltd.		398,000		2,179,103
Hang Lung Group, Ltd.		145,000		618,510
Hang Lung Properties, Ltd.		415,000		1,078,685
Hang Seng Bank, Ltd.		129,000		2,616,020
Henderson Land Development Co., Ltd.		193,868		1,201,151
HK Electric Investments & HK Electric Investments, Ltd.(c)		455,490		420,236
HKT Trust & HKT, Ltd.		679,000		878,947
Hong Kong & China Gas Co., Ltd.		1,289,000		2,577,502
Hong Kong Exchanges & Clearing, Ltd.		196,409		4,943,396
Hongkong Land Holdings, Ltd.		195,000		1,499,550
Hysan Development Co., Ltd.		105,000		476,259
Jardine Matheson Holdings, Ltd.		43,600		2,801,300
Jardine Strategic Holdings, Ltd.		38,500		1,617,000
Kerry Properties, Ltd.		118,000		409,200
Li & Fung, Ltd.		1,090,000		472,663
Link REIT		372,500		2,609,873
Melco Crown Entertainment, Ltd. ADR		32,723		606,684
MTR Corp., Ltd.		238,645		1,340,392
New World Development Co., Ltd.		965,709		1,187,953
NWS Holdings, Ltd.		267,962		488,928
PCCW, Ltd.		748,000		440,821
Power Assets Holdings, Ltd.		252,000		2,172,554
Sands China, Ltd.		414,000		1,917,776
Shangri-La Asia, Ltd.		162,000		235,970
Sino Land Co., Ltd.		573,556		1,005,190
SJM Holdings, Ltd.		256,000		208,186
Sun Hung Kai Properties, Ltd.		252,000		3,703,069
Swire Pacific, Ltd. Class A		97,000		968,565
Swire Properties, Ltd.		193,600		620,297
Techtronic Industries Co., Ltd.		258,000		1,044,084
WH Group, Ltd.(c)		1,383,309		1,192,584
Wharf Holdings, Ltd.		241,000		2,068,417
Wheelock & Co., Ltd.		151,000		1,193,972
Yue Yuen Industrial Holdings, Ltd.		111,000		436,344
				77,565,525
Ireland – 0.6%
Bank of Ireland(a)		4,567,642		1,148,050
CRH PLC		143,626		5,080,052
Experian PLC		167,229		3,404,336
James Hardie Industries PLC		75,134		1,178,989
Kerry Group PLC Class A		27,239		2,147,136
Paddy Power Betfair PLC		13,096		1,407,686
Ryanair Holdings PLC ADR(a)		4,562		378,555
				14,744,804

See accompanying notes to schedules of investments.

112

State Street Master Funds

State Street International Developed Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Israel – 0.6%
Azrieli Group, Ltd.		7,782	$	411,982
Bank Hapoalim BM		186,339		1,133,278
Bank Leumi Le-Israel BM(a)		253,799		1,118,519
Bezeq The Israeli Telecommunication Corp., Ltd.		319,597		573,083
Check Point Software Technologies, Ltd.(a)		22,510		2,310,877
Elbit Systems, Ltd.		3,969		453,256
Frutarom Industries, Ltd.		6,562		366,012
Israel Chemicals, Ltd.		90,984		385,940
Mizrahi Tefahot Bank, Ltd.		25,993		439,887
Nice, Ltd.		9,356		627,255
Teva Pharmaceutical Industries, Ltd.		133,383		4,375,682
Teva Pharmaceutical Industries, Ltd. ADR		21,080		676,457
				12,872,228
Italy – 1.9%
Assicurazioni Generali SpA		204,351		3,256,597
Atlantia SpA		71,762		1,857,423
Enel SpA		1,303,224		6,152,510
Eni SpA		443,638		7,283,465
Ferrari NV		20,902		1,559,312
Intesa Sanpaolo SpA(d)		2,186,784		5,954,773
Intesa Sanpaolo SpA(d)		196,041		499,867
Leonardo SpA(a)		71,372		1,014,504
Luxottica Group SpA		29,864		1,652,948
Mediobanca SpA		91,509		827,030
Poste Italiane SpA(c)		85,106		568,907
Prysmian SpA		37,010		980,892
Saipem SpA(a)		1,096,115		498,835
Snam SpA		425,758		1,846,067
Telecom Italia RSP/Milano		963,350		704,760
Telecom Italia SpA/Milano(a)		1,980,406		1,785,594
Terna Rete Elettrica Nazionale SpA		257,268		1,279,498
UniCredit SpA		326,534		5,046,580
UnipolSai Assicurazioni SpA		194,056		429,219
				43,198,781
Japan – 22.9%
ABC-Mart, Inc.		5,800		338,849
Acom Co., Ltd.(a)		52,500		209,661
Aeon Co., Ltd.		113,600		1,656,645
AEON Financial Service Co., Ltd.		20,500		385,789
Aeon Mall Co., Ltd.		16,200		254,711
Air Water, Inc.		25,000		460,379
Aisin Seiki Co., Ltd.		31,900		1,565,943
Ajinomoto Co., Inc.		95,100		1,874,604
Alfresa Holdings Corp.		29,300		507,222
Alps Electric Co., Ltd.		34,700		982,487
Amada Holdings Co., Ltd.		56,400		643,313
ANA Holdings, Inc.		198,000		603,791
Aozora Bank, Ltd.		228,000		838,912
Asahi Glass Co., Ltd.		175,000		1,416,584
Asahi Group Holdings, Ltd.		68,000		2,567,926
Asahi Kasei Corp.		215,000		2,083,819
Asics Corp.		27,100		434,845
Astellas Pharma, Inc.		368,800		4,852,022
Bandai Namco Holdings, Inc.		36,000		1,075,832
Bank of Kyoto, Ltd.		63,000		458,521
Benesse Holdings, Inc.		13,600		424,733
Bridgestone Corp.		111,600		4,509,870
Brother Industries, Ltd.		38,300		799,134
Calbee, Inc.		15,100		514,265
Canon, Inc.		185,700		5,784,481
Casio Computer Co., Ltd.		37,900		526,852
Central Japan Railway Co.		24,800		4,037,261
Chiba Bank, Ltd.		134,000		859,822
Chubu Electric Power Co., Inc.		106,700		1,427,710
Chugai Pharmaceutical Co., Ltd.		39,000		1,338,733
Chugoku Bank, Ltd.		30,400		441,964
Chugoku Electric Power Co., Inc.		44,000		486,476
Coca-Cola West Co., Ltd.		24,100		776,443
Concordia Financial Group, Ltd.		206,100		953,280
Credit Saison Co., Ltd.		28,200		502,604
CYBERDYNE, Inc.(a)		22,800		326,971
Dai Nippon Printing Co., Ltd.		100,000		1,076,909
Dai-ichi Life Holdings, Inc.		187,300		3,355,869
Daicel Corp.		51,500		619,775
Daiichi Sankyo Co., Ltd.		101,400		2,281,341
Daikin Industries, Ltd.		40,300		4,045,190
Daito Trust Construction Co., Ltd.		12,200		1,674,585
Daiwa House Industry Co., Ltd.		100,200		2,873,905
Daiwa House REIT Investment Corp.		270		701,229
Daiwa Securities Group, Inc.		285,000		1,733,837
DeNA Co., Ltd.		17,400		352,747
Denso Corp.		84,000		3,691,537
Dentsu, Inc.		37,900		2,054,348
Don Quijote Holdings Co., Ltd.		19,000		658,171
East Japan Railway Co.		58,000		5,045,787
Eisai Co., Ltd.		42,200		2,182,902
Electric Power Development Co., Ltd.		23,900		558,732
FamilyMart UNY Holdings Co., Ltd.		14,500		864,040
FANUC Corp.		33,400		6,840,061
Fast Retailing Co., Ltd.		9,100		2,851,763
Fuji Electric Co., Ltd.		96,000		569,470
Fuji Heavy Industries, Ltd.		105,700		3,873,042
FUJIFILM Holdings Corp.		74,800		2,918,697
Fujitsu, Ltd.		317,000		1,937,048
Fukuoka Financial Group, Inc.		134,000		579,628
Hachijuni Bank, Ltd.		78,600		443,681
Hakuhodo DY Holdings, Inc.		41,000		485,686
Hamamatsu Photonics KK		27,400		788,091
Hankyu Hanshin Holdings, Inc.		40,400		1,312,465
Hikari Tsushin, Inc.		3,900		380,795
Hino Motors, Ltd.		49,600		599,580
Hirose Electric Co., Ltd.		5,100		704,837
Hiroshima Bank, Ltd.		90,000		382,034

See accompanying notes to schedules of investments.

113

State Street Master Funds

State Street International Developed Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Japan – (continued)
Hisamitsu Pharmaceutical Co., Inc.		10,400	$	593,592
Hitachi Chemical Co., Ltd.		19,900		550,049
Hitachi Construction Machinery Co., Ltd.		19,300		480,638
Hitachi High-Technologies Corp.		11,800		480,239
Hitachi Metals, Ltd.		40,500		567,720
Hitachi, Ltd.		829,000		4,482,388
Hokuriku Electric Power Co.		30,100		291,735
Honda Motor Co., Ltd.		283,700		8,531,623
Hoshizaki Corp.		7,900		621,054
Hoya Corp.		66,200		3,181,973
Hulic Co., Ltd.		50,000		469,802
Idemitsu Kosan Co., Ltd.		17,100		593,889
IHI Corp.(a)		235,000		740,241
Iida Group Holdings Co., Ltd.		26,200		401,594
Inpex Corp.		165,400		1,624,610
Isetan Mitsukoshi Holdings, Ltd.		55,600		609,739
Isuzu Motors, Ltd.		98,200		1,297,671
ITOCHU Corp.		263,900		3,741,919
J Front Retailing Co., Ltd.		40,200		595,262
Japan Airlines Co., Ltd.		19,600		620,206
Japan Airport Terminal Co., Ltd.		10,700		371,134
Japan Exchange Group, Inc.		87,300		1,241,771
Japan Post Bank Co., Ltd.		75,600		936,943
Japan Post Holdings Co., Ltd.		80,000		1,002,961
Japan Prime Realty Investment Corp. REIT		138		533,770
Japan Real Estate Investment Corp. REIT		220		1,164,857
Japan Retail Fund Investment Corp. REIT		455		891,789
Japan Tobacco, Inc.		190,100		6,172,322
JFE Holdings, Inc.		87,100		1,491,792
JGC Corp.		34,100		592,152
JSR Corp.		33,300		560,927
JTEKT Corp.		38,300		594,281
JX Holdings, Inc.		352,100		1,727,480
Kajima Corp.		160,000		1,042,448
Kakaku.com, Inc.		26,600		361,653
Kamigumi Co., Ltd.		40,000		345,329
Kaneka Corp.		49,000		364,103
Kansai Electric Power Co., Inc.		121,200		1,486,856
Kansai Paint Co., Ltd.		41,500		880,055
Kao Corp.		86,400		4,732,887
Kawasaki Heavy Industries, Ltd.		268,000		812,923
KDDI Corp.		319,300		8,372,921
Keihan Holdings Co., Ltd.		84,000		513,363
Keikyu Corp.		87,000		954,088
Keio Corp.		105,000		831,105
Keisei Electric Railway Co., Ltd.		23,000		533,151
Keyence Corp.		16,800		6,721,206
Kikkoman Corp.		28,000		835,502
Kintetsu Group Holdings Co., Ltd.		314,000		1,129,983
Kirin Holdings Co., Ltd.		146,600		2,763,469
Kobe Steel, Ltd.(a)		53,600		488,716
Koito Manufacturing Co., Ltd.		20,100		1,044,414
Komatsu, Ltd.		158,700		4,132,353
Konami Holdings Corp.		15,400		653,011
Konica Minolta, Inc.		73,400		656,075
Kose Corp.		5,500		497,038
Kubota Corp.		181,000		2,714,269
Kuraray Co., Ltd.		66,900		1,013,436
Kurita Water Industries, Ltd.		17,800		430,184
Kyocera Corp.		56,100		3,122,428
Kyowa Hakko Kirin Co., Ltd.		50,400		796,956
Kyushu Electric Power Co., Inc.		69,300		737,591
Kyushu Financial Group, Inc.		61,500		375,855
Lawson, Inc.		9,100		616,575
LINE Corp.(a)		8,000		306,919
Lion Corp.		39,000		700,691
LIXIL Group Corp.		48,600		1,232,119
M3, Inc.		34,600		857,936
Mabuchi Motor Co., Ltd.		9,600		540,178
Makita Corp.		37,600		1,315,983
Marubeni Corp.		286,000		1,759,427
Marui Group Co., Ltd.		39,800		540,406
Maruichi Steel Tube, Ltd.		10,400		295,396
Mazda Motor Corp.		100,900		1,451,518
McDonald’s Holdings Co., Japan, Ltd.		13,200		384,995
Mebuki Financial Group, Inc.		181,300		724,029
Medipal Holdings Corp.		28,900		452,835
MEIJI Holdings Co., Ltd.		19,900		1,655,506
MINEBEA MITSUMI, Inc.		69,000		919,546
Miraca Holdings, Inc.		9,700		445,697
MISUMI Group, Inc.		44,200		798,083
Mitsubishi Chemical Holdings Corp.		231,600		1,790,364
Mitsubishi Corp.		261,300		5,640,825
Mitsubishi Electric Corp.		331,000		4,743,848
Mitsubishi Estate Co., Ltd.		215,000		3,916,809
Mitsubishi Gas Chemical Co., Inc.		30,000		622,454
Mitsubishi Heavy Industries, Ltd.		536,000		2,148,233
Mitsubishi Logistics Corp.		15,000		206,497
Mitsubishi Materials Corp.		21,600		653,253
Mitsubishi Motors Corp.		116,800		701,240
Mitsubishi Tanabe Pharma Corp.		36,200		753,043
Mitsubishi UFJ Financial Group, Inc.		2,190,100		13,752,248
Mitsubishi UFJ Lease & Finance Co., Ltd.		81,700		406,924
Mitsui & Co., Ltd.		292,700		4,235,652
Mitsui Chemicals, Inc.		173,000		853,899
Mitsui Fudosan Co., Ltd.		155,000		3,302,253
Mitsui OSK Lines, Ltd.		202,000		634,479
Mixi, Inc.		8,800		423,297
Mizuho Financial Group, Inc.		4,152,000		7,601,256
MS&AD Insurance Group Holdings, Inc.		89,400		2,840,133
Murata Manufacturing Co., Ltd.		32,800		4,661,115
Nabtesco Corp.		18,700		495,064
Nagoya Railroad Co., Ltd.		146,000		656,430
NEC Corp.		451,000		1,084,699
Nexon Co., Ltd.		29,000		460,388

See accompanying notes to schedules of investments.

114

State Street Master Funds

State Street International Developed Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Japan – (continued)
NGK Insulators, Ltd.		45,900	$	1,038,033
NGK Spark Plug Co., Ltd.		29,600		675,782
NH Foods, Ltd.		33,000		885,192
Nidec Corp.		41,000		3,898,367
Nikon Corp.		60,100		870,514
Nintendo Co., Ltd.		19,700		4,567,437
Nippon Building Fund, Inc. REIT		236		1,289,814
Nippon Electric Glass Co., Ltd.		76,000		459,015
Nippon Express Co., Ltd.		134,000		687,858
Nippon Paint Holdings Co., Ltd.		30,200		1,050,211
Nippon Prologis REIT, Inc.		256		554,364
Nippon Steel & Sumitomo Metal Corp.		138,200		3,181,217
Nippon Telegraph & Telephone Corp.		121,200		5,168,648
Nippon Yusen KK(a)		268,000		565,198
Nissan Chemical Industries, Ltd.		20,000		581,531
Nissan Motor Co., Ltd.		399,700		3,850,650
Nisshin Seifun Group, Inc.		33,100		493,396
Nissin Foods Holdings Co., Ltd.		9,400		520,488
Nitori Holdings Co., Ltd.		13,300		1,679,359
Nitto Denko Corp.		28,100		2,169,220
NOK Corp.		19,900		461,470
Nomura Holdings, Inc.		630,900		3,917,434
Nomura Real Estate Holdings, Inc.		22,600		359,799
Nomura Real Estate Master Fund, Inc.		666		1,032,799
Nomura Research Institute, Ltd.		21,800		802,118
NSK, Ltd.		81,400		1,162,961
NTT Data Corp.		22,500		1,066,140
NTT DOCOMO, Inc.		241,200		5,611,693
Obayashi Corp.		112,400		1,050,062
Obic Co., Ltd.		10,900		518,442
Odakyu Electric Railway Co., Ltd.		52,500		1,020,506
Oji Holdings Corp.		133,000		621,852
Olympus Corp.		49,900		1,916,647
Omron Corp.		33,200		1,455,461
Ono Pharmaceutical Co., Ltd.		73,200		1,513,860
Oracle Corp. Japan		7,400		422,364
Oriental Land Co., Ltd.		37,100		2,125,184
ORIX Corp.		230,200		3,403,522
Osaka Gas Co., Ltd.		311,000		1,180,589
Otsuka Corp.		9,100		493,260
Otsuka Holdings Co., Ltd.		66,700		3,006,079
Panasonic Corp.		378,900		4,277,629
Park24 Co., Ltd.		18,200		475,947
Pola Orbis Holdings, Inc.		16,800		405,112
Rakuten, Inc.		165,700		1,658,041
Recruit Holdings Co., Ltd.		62,800		3,201,149
Resona Holdings, Inc.		378,200		2,029,308
Ricoh Co., Ltd.		119,300		980,695
Rinnai Corp.		5,600		445,266
Rohm Co., Ltd.		14,800		982,859
Ryohin Keikaku Co., Ltd.		3,800		831,751
Sankyo Co., Ltd.		9,200		307,135
Santen Pharmaceutical Co., Ltd.		70,000		1,012,654
SBI Holdings, Inc.		38,100		530,658
Secom Co., Ltd.		36,000		2,574,567
Sega Sammy Holdings, Inc.		32,200		431,144
Seibu Holdings, Inc.		28,800		474,788
Seiko Epson Corp.		49,600		1,043,367
Sekisui Chemical Co., Ltd.		72,200		1,212,297
Sekisui House, Ltd.		106,600		1,751,634
Seven & i Holdings Co., Ltd.		132,000		5,167,226
Seven Bank, Ltd.		126,400		412,901
Sharp Corp.(a)		285,000		1,202,100
Shimadzu Corp.		37,000		587,391
Shimamura Co., Ltd.		3,700		488,441
Shimano, Inc.		12,600		1,837,476
Shimizu Corp.		89,000		797,110
Shin-Etsu Chemical Co., Ltd.		67,700		5,859,273
Shinsei Bank, Ltd.		309,000		568,473
Shionogi & Co., Ltd.		53,200		2,744,266
Shiseido Co., Ltd.		67,100		1,764,363
Shizuoka Bank, Ltd.		86,000		699,237
Showa Shell Sekiyu KK		34,700		350,955
SMC Corp.		9,800		2,895,235
SoftBank Group Corp.		143,600		10,131,771
Sohgo Security Services Co., Ltd.		11,200		417,625
Sompo Holdings, Inc.		60,100		2,200,017
Sony Corp.		217,700		7,357,607
Sony Financial Holdings, Inc.		33,200		533,023
Stanley Electric Co., Ltd.		23,600		672,440
Start Today Co., Ltd.		30,300		669,738
Sumitomo Chemical Co., Ltd.		269,000		1,501,553
Sumitomo Corp.		211,300		2,839,646
Sumitomo Dainippon Pharma Co., Ltd.		26,900		443,706
Sumitomo Electric Industries, Ltd.		129,100		2,138,729
Sumitomo Heavy Industries, Ltd.		94,000		654,617
Sumitomo Metal Mining Co., Ltd.		86,000		1,222,121
Sumitomo Mitsui Financial Group, Inc.		233,800		8,487,131
Sumitomo Mitsui Trust Holdings, Inc.		56,400		1,953,729
Sumitomo Realty & Development Co., Ltd.		62,000		1,605,779
Sumitomo Rubber Industries, Ltd.		29,600		503,915
Sundrug Co., Ltd.		12,400		415,633
Suntory Beverage & Food, Ltd.		24,700		1,039,603
Suruga Bank, Ltd.		26,800		563,755
Suzuken Co., Ltd.		13,600		445,481
Suzuki Motor Corp.		57,900		2,401,632
Sysmex Corp.		27,800		1,684,017
T&D Holdings, Inc.		100,000		1,450,238
Taiheiyo Cement Corp.		200,000		667,684
Taisei Corp.		177,000		1,288,226
Taisho Pharmaceutical Holdings Co., Ltd.		5,900		478,650
Taiyo Nippon Sanso Corp.		23,300		272,248

See accompanying notes to schedules of investments.

115

State Street Master Funds

State Street International Developed Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Japan – (continued)
Takashimaya Co., Ltd.		53,000	$	463,268
Takeda Pharmaceutical Co., Ltd.		123,800		5,809,479
TDK Corp.		20,500		1,297,003
Teijin, Ltd.		31,200		587,712
Terumo Corp.		57,500		1,994,414
THK Co., Ltd.		21,300		535,797
Tobu Railway Co., Ltd.		184,000		931,311
Toho Co., Ltd.		18,800		497,880
Toho Gas Co., Ltd.		63,000		444,952
Tohoku Electric Power Co., Inc.		79,000		1,069,120
Tokio Marine Holdings, Inc.		116,700		4,918,094
Tokyo Electric Power Co. Holdings, Inc.(a)		268,100		1,049,014
Tokyo Electron, Ltd.		27,800		3,032,478
Tokyo Gas Co., Ltd.		334,000		1,518,482
Tokyo Tatemono Co., Ltd.		36,300		478,223
Tokyu Corp.		177,000		1,251,692
Tokyu Fudosan Holdings Corp.		90,400		490,008
TonenGeneral Sekiyu KK(a)		50,000		625,543
Toppan Printing Co., Ltd.		94,000		957,462
Toray Industries, Inc.		247,000		2,187,822
Toshiba Corp.(a)		741,000		1,605,289
TOTO, Ltd.		26,700		1,007,570
Toyo Seikan Group Holdings, Ltd.		28,500		462,425
Toyo Suisan Kaisha, Ltd.		14,500		539,374
Toyoda Gosei Co., Ltd.		9,700		246,439
Toyota Industries Corp.		27,200		1,349,870
Toyota Motor Corp.		451,200		24,465,139
Toyota Tsusho Corp.		37,100		1,122,023
Trend Micro, Inc.		18,100		804,047
Tsuruha Holdings, Inc.		5,700		526,878
Unicharm Corp.		71,000		1,699,654
United Urban Investment Corp. REIT		568		871,650
USS Co., Ltd.		36,100		601,289
West Japan Railway Co.		28,200		1,832,506
Yahoo! Japan Corp.		252,500		1,164,722
Yakult Honsha Co., Ltd.		14,300		793,090
Yamada Denki Co., Ltd.		100,200		499,067
Yamaguchi Financial Group, Inc.		39,000		422,445
Yamaha Corp.		30,500		838,935
Yamaha Motor Co., Ltd.		49,600		1,193,373
Yamato Holdings Co., Ltd.		60,500		1,266,412
Yamazaki Baking Co., Ltd.		22,000		452,122
Yaskawa Electric Corp.		44,800		898,171
Yokogawa Electric Corp.		38,300		602,186
Yokohama Rubber Co., Ltd.		20,700		404,786
				527,222,483
Jordan – 0.0%(b)
Hikma Pharmaceuticals PLC		23,594		584,457
Luxembourg – 0.3%
ArcelorMittal(a)		328,055		2,766,970
Eurofins Scientific SE		1,766		770,357
Millicom International Cellular SA SDR		10,834		606,358
RTL Group SA(a)		6,365		513,980
SES SA		60,931		1,421,004
Tenaris SA		86,893		1,493,488
				7,572,157
Macau – 0.0%(b)
MGM China Holdings, Ltd.		169,200		352,704
Wynn Macau, Ltd.		272,400		554,509
				907,213
Mexico – 0.0%(b)
Fresnillo PLC		35,255		685,957
Netherlands – 4.3%
ABN AMRO Group NV(c)		50,594		1,231,066
Aegon NV		315,571		1,610,302
AerCap Holdings NV(a)		26,299		1,208,965
Akzo Nobel NV		44,532		3,702,216
Altice NV Class A(a)		64,356		1,459,581
Altice NV Class B(a)		21,103		478,499
ASML Holding NV		64,079		8,525,837
Boskalis Westminster		17,300		598,116
EXOR NV		20,181		1,046,421
Gemalto NV		15,050		843,146
Heineken Holding NV		18,480		1,473,897
Heineken NV		40,125		3,424,671
ING Groep NV		673,609		10,208,893
Koninklijke Ahold Delhaize NV		224,731		4,821,641
Koninklijke DSM NV		31,053		2,106,019
Koninklijke KPN NV		589,838		1,780,921
Koninklijke Philips NV		163,679		5,274,643
Koninklijke Vopak NV		12,737		556,834
NN Group NV		56,141		1,830,490
NXP Semiconductors NV(a)		47,872		4,954,752
Randstad Holding NV		20,126		1,164,543
Royal Dutch Shell PLC Class A		755,107		19,790,928
Royal Dutch Shell PLC Class B		648,940		17,726,500
Wolters Kluwer NV		51,685		2,153,972
				97,972,853
New Zealand – 0.2%
Auckland International Airport, Ltd.		171,592		810,871
Contact Energy, Ltd.		116,874		413,406
Fletcher Building, Ltd.		125,286		728,675
Mercury NZ, Ltd.		144,564		318,331
Meridian Energy, Ltd.		192,725		377,228
Ryman Healthcare, Ltd.		72,076		423,736
Spark New Zealand, Ltd.		345,222		844,646
				3,916,893
Norway – 0.6%
DNB ASA		167,297		2,650,994
Gjensidige Forsikring ASA		32,985		502,327
Marine Harvest ASA(a)		67,620		1,030,570
Norsk Hydro ASA		230,317		1,337,029
Orkla ASA		135,099		1,209,598
Schibsted ASA Class A		13,202		339,699
Schibsted ASA Class B		15,363		351,480
Statoil ASA		194,530		3,322,608
Telenor ASA		132,641		2,206,848
Yara International ASA		28,907		1,112,675
				14,063,828

See accompanying notes to schedules of investments.

116

State Street Master Funds

State Street International Developed Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Portugal – 0.2%
EDP – Energias de Portugal SA		384,520	$	1,305,761
Galp Energia SGPS SA		90,821		1,381,782
Jeronimo Martins SGPS SA		45,284		812,229
				3,499,772
Singapore – 1.3%
Ascendas REIT		402,050		725,088
CapitaLand Commercial Trust		343,000		379,256
CapitaLand Mall Trust REIT		390,000		549,846
CapitaLand, Ltd.		470,700		1,222,816
City Developments, Ltd.		72,400		528,505
ComfortDelGro Corp., Ltd.		335,000		613,755
DBS Group Holdings, Ltd.		303,172		4,209,216
Genting Singapore PLC		953,000		695,670
Global Logistic Properties, Ltd.		497,500		989,802
Golden Agri-Resources, Ltd.		1,326,600		365,520
Hutchison Port Holdings Trust		935,800		388,357
Jardine Cycle & Carriage, Ltd.		17,233		540,929
Keppel Corp., Ltd.		265,300		1,317,671
Oversea-Chinese Banking Corp., Ltd.		529,126		3,680,745
SATS, Ltd.		114,700		400,584
Sembcorp Industries, Ltd.		177,900		404,868
Singapore Airlines, Ltd.		91,100		656,536
Singapore Exchange, Ltd.		152,600		840,922
Singapore Press Holdings, Ltd.		306,400		778,444
Singapore Technologies Engineering, Ltd.		247,000		659,350
Singapore Telecommunications, Ltd.		1,387,900		3,893,629
StarHub, Ltd.		120,500		248,365
Suntec Real Estate Investment Trust		417,500		534,835
United Overseas Bank, Ltd.		224,460		3,551,714
UOL Group, Ltd.		87,800		437,963
Wilmar International, Ltd.		358,400		905,426
				29,519,812
South Africa – 0.1%
Investec PLC		119,452		812,566
Mediclinic International PLC		60,148		535,510
Mondi PLC		61,712		1,487,023
				2,835,099
Spain – 3.2%
Abertis Infraestructuras SA		111,373		1,798,696
ACS Actividades de Construccion y Servicios SA		31,553		1,076,376
Aena SA(c)		11,655		1,848,648
Amadeus IT Group SA		77,377		3,935,996
Banco Bilbao Vizcaya Argentaria SA		1,142,426		8,883,077
Banco de Sabadell SA		899,353		1,652,549
Banco Popular Espanol SA		667,984		650,142
Banco Santander SA		2,500,668		15,365,511
Bankia SA		751,511		856,828
Bankinter SA		127,076		1,069,780
CaixaBank SA		610,950		2,632,715
Distribuidora Internacional de Alimentacion SA		112,631		653,038
Enagas SA		40,604		1,057,472
Endesa SA		54,326		1,280,039
Ferrovial SA		80,948		1,624,201
Gas Natural SDG SA		63,126		1,386,786
Grifols SA		52,762		1,297,362
Iberdrola SA		953,399		6,837,139
Industria de Diseno Textil SA		188,165		6,649,359
Mapfre SA		194,652		669,331
Red Electrica Corp. SA		75,662		1,456,637
Repsol SA		196,944		3,049,034
Telefonica SA		776,333		8,705,975
Zardoya Otis SA		36,394		337,092
				74,773,783
Sweden – 2.8%
Alfa Laval AB		52,525		994,812
Assa Abloy AB Class B		174,478		3,601,615
Atlas Copco AB Class A		115,392		4,087,955
Atlas Copco AB Class B		64,266		2,049,993
Boliden AB		47,714		1,426,883
Electrolux AB Series B		42,614		1,188,933
Getinge AB Class B		32,302		568,739
Hennes & Mauritz AB Class B		164,448		4,217,891
Hexagon AB Class B		42,874		1,728,732
Husqvarna AB Class B		80,679		710,707
ICA Gruppen AB		13,522		463,137
Industrivarden AB Class C		27,746		603,194
Investor AB Class B		77,538		3,275,801
Kinnevik AB Class B		41,542		1,112,030
L E Lundbergforetagen AB Class B		6,443		438,395
Lundin Petroleum AB(a)		30,763		626,403
Nordea Bank AB		523,958		6,003,484
Sandvik AB		184,821		2,771,808
Securitas AB Class B		56,568		887,013
Skandinaviska Enskilda Banken AB Class A		264,876		2,957,801
Skanska AB Class B		57,692		1,363,419
SKF AB Class B		66,891		1,328,335
Svenska Cellulosa AB SCA Class B		103,517		3,350,740
Svenska Handelsbanken AB Class A		265,339		3,652,449
Swedbank AB Class A		155,607		3,618,159
Swedish Match AB		30,182		985,412
Tele2 AB Class B		66,816		640,224
Telefonaktiebolaget LM Ericsson Class B		521,561		3,493,313
Telia Co. AB		428,370		1,803,527
Volvo AB Class B		269,661		3,995,850
				63,946,754
Switzerland – 9.2%
ABB, Ltd.		328,568		7,691,042
Actelion, Ltd.		16,635		4,698,251
Adecco Group AG		29,333		2,085,062
Aryzta AG(a)		14,306		459,501
Baloise Holding AG		8,886		1,222,441
Barry Callebaut AG(a)		370		483,870

See accompanying notes to schedules of investments.

117

State Street Master Funds

State Street International Developed Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
Switzerland – (continued)
Chocoladefabriken Lindt & Spruengli AG(a)(d)		176	$	998,731
Chocoladefabriken Lindt & Spruengli AG(a)(d)		18		1,196,313
Cie Financiere Richemont SA		89,722		7,099,238
Coca-Cola HBC AG(a)		29,579		762,303
Credit Suisse Group AG(a)		346,092		5,151,877
Dufry AG(a)		7,917		1,206,988
EMS-Chemie Holding AG		1,508		879,083
Galenica AG		718		757,488
Geberit AG		6,593		2,844,155
Givaudan SA		1,608		2,898,079
Glencore PLC(a)		2,131,553		8,346,703
Julius Baer Group, Ltd.(a)		40,401		2,018,133
Kuehne + Nagel International AG		9,666		1,366,441
LafargeHolcim, Ltd.(a)(d)		74,004		4,376,879
LafargeHolcim, Ltd.(a)(d)		4,070		241,595
Lonza Group AG(a)		9,881		1,869,685
Nestle SA		537,962		41,303,142
Novartis AG		386,379		28,700,014
Pargesa Holding SA		5,778		408,694
Partners Group Holding AG		2,977		1,601,593
Roche Holding AG		121,535		31,059,147
Schindler Holding AG(d)		7,268		1,407,202
Schindler Holding AG(d)		3,944		748,255
SGS SA		943		2,013,278
Sika AG		377		2,263,620
Sonova Holding AG		9,633		1,336,754
STMicroelectronics NV		113,126		1,733,842
Swatch Group AG(d)		5,245		1,879,596
Swatch Group AG(d)		8,419		587,088
Swiss Life Holding AG(a)		5,471		1,766,549
Swiss Prime Site AG(a)		13,273		1,168,904
Swiss Re AG		56,534		5,080,407
Swisscom AG		4,460		2,059,010
Syngenta AG		16,174		7,143,739
UBS Group AG		636,662		10,196,006
Wolseley PLC		43,536		2,732,868
Zurich Insurance Group AG		26,280		7,020,602
				210,864,168
United Kingdom – 15.3%
3i Group PLC		159,169		1,491,752
Aberdeen Asset Management PLC		149,307		494,197
Admiral Group PLC		38,319		953,049
Anglo American PLC(a)		241,082		3,676,317
Ashtead Group PLC		86,365		1,785,159
Associated British Foods PLC		59,987		1,954,780
AstraZeneca PLC		217,411		13,355,202
Auto Trader Group PLC(c)		157,716		773,678
Aviva PLC		696,450		4,633,060
Babcock International Group PLC		40,052		441,732
BAE Systems PLC		544,802		4,377,017
Barclays PLC		2,887,118		8,126,554
Barratt Developments PLC		177,650		1,214,009
Berkeley Group Holdings PLC		24,323		975,399
BP PLC		3,285,156		18,795,806
British American Tobacco PLC		320,969		21,271,854
British Land Co. PLC REIT		160,732		1,226,023
BT Group PLC		1,463,452		5,822,977
Bunzl PLC		59,591		1,728,761
Burberry Group PLC		77,992		1,681,333
Capita PLC		108,576		766,415
Centrica PLC		942,634		2,557,816
CNH Industrial NV		172,154		1,664,510
Cobham PLC		281,893		468,816
Coca-Cola European Partners PLC		37,067		1,389,557
Compass Group PLC		287,946		5,422,536
Croda International PLC		23,514		1,047,926
DCC PLC		15,020		1,319,419
Diageo PLC		432,579		12,351,874
Direct Line Insurance Group PLC		242,834		1,054,886
Dixons Carphone PLC		154,993		615,544
easyJet PLC		28,875		370,455
Fiat Chrysler Automobiles NV(a)		152,507		1,671,916
G4S PLC		281,805		1,072,302
GKN PLC		298,523		1,356,156
GlaxoSmithKline PLC		836,941		17,367,547
Hammerson PLC		141,199		1,008,171
Hargreaves Lansdown PLC		41,540		675,788
HSBC Holdings PLC		3,378,052		27,494,574
IMI PLC		44,363		661,801
Imperial Brands PLC		164,593		7,958,879
Inmarsat PLC		71,204		757,260
InterContinental Hotels Group PLC		34,020		1,662,475
International Consolidated Airlines Group SA		152,886		1,013,819
Intertek Group PLC		27,259		1,340,944
Intu Properties PLC		156,211		545,373
ITV PLC		648,668		1,775,557
J Sainsbury PLC		294,197		972,303
Johnson Matthey PLC		31,502		1,213,264
Kingfisher PLC		382,427		1,559,429
Land Securities Group PLC REIT		143,120		1,895,233
Legal & General Group PLC		1,004,748		3,107,046
Lloyds Banking Group PLC		11,178,379		9,270,213
London Stock Exchange Group PLC		53,221		2,110,307
Marks & Spencer Group PLC		273,085		1,150,785
Meggitt PLC		143,867		801,088
Merlin Entertainments PLC(c)		113,079		678,153
National Grid PLC		646,156		8,188,937
Next PLC		24,538		1,325,529
Old Mutual PLC		828,681		2,078,666
Pearson PLC		147,939		1,262,559
Persimmon PLC		52,097		1,364,130
Petrofac, Ltd.		44,356		509,723
Provident Financial PLC		26,726		1,001,583
Prudential PLC		448,776		9,461,360
Randgold Resources, Ltd.		16,737		1,457,690
Reckitt Benckiser Group PLC		109,022		9,932,754

See accompanying notes to schedules of investments.

118

State Street Master Funds

State Street International Developed Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – (continued)
United Kingdom – (continued)
RELX NV		172,954	$	3,211,303
RELX PLC		188,196		3,680,557
Rio Tinto PLC		215,495		8,648,503
Rio Tinto, Ltd.		73,783		3,403,012
Rolls-Royce Holdings PLC(a)		324,555		3,060,032
Royal Bank of Scotland Group PLC(a)		599,260		1,814,164
Royal Mail PLC		163,901		871,038
RSA Insurance Group PLC		177,620		1,302,646
Sage Group PLC		187,691		1,479,772
Schroders PLC		24,797		939,525
Segro PLC		173,193		987,989
Severn Trent PLC		39,903		1,188,540
Sky PLC		173,380		2,115,998
Smith & Nephew PLC		154,134		2,343,681
Smiths Group PLC		68,772		1,392,275
SSE PLC		178,690		3,298,018
St James’s Place PLC		92,071		1,222,683
Standard Chartered PLC(a)		575,954		5,495,140
Standard Life PLC		350,606		1,555,059
Tate & Lyle PLC		75,937		725,934
Taylor Wimpey PLC		560,962		1,354,510
Tesco PLC(a)		1,423,757		3,304,306
Travis Perkins PLC		39,316		744,323
Unilever NV		282,272		14,059,665
Unilever PLC		223,039		10,987,232
United Utilities Group PLC		112,170		1,393,513
Vodafone Group PLC		4,596,413		11,960,725
Weir Group PLC		34,531		827,747
Whitbread PLC		32,926		1,629,601
William Hill PLC		143,001		519,996
Wm Morrison Supermarkets PLC		391,659		1,175,400
Worldpay Group PLC(c)		316,956		1,170,782
WPP PLC		217,339		4,761,438
				352,136,834
United States – 0.6%
Carnival PLC		31,472		1,801,634
Mobileye NV(a)		30,377		1,865,148
QIAGEN NV(a)		37,149		1,081,127
Shire PLC		122,881		7,161,932
Shire PLC ADR		10,670		1,859,034
Taro Pharmaceutical Industries, Ltd.(a)		2,744		320,005
				14,088,880
TOTAL COMMON STOCKS (Cost $2,160,043,886)				2,252,063,977
RIGHTS – 0.0%(b)
Germany – 0.0%(b)
Deutsche Bank AG (expiring 4/6/17)(a) (Cost $0)		236,302		566,130
SHORT-TERM INVESTMENT – 1.8%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(e)(f) (Cost $41,997,206)		41,997,206		41,997,206
TOTAL INVESTMENTS – 99.5% (Cost $2,202,041,092)				2,294,627,313
Other Assets in Excess of Liabilities – 0.5%				10,976,254
NET ASSETS – 100.0%			$	2,305,603,567

^(a)  Non-income producing security.

^(b)  Amount is less than 0.05% of net assets.

^(c)  Securities purchased pursuant to Rule 144A of the Securities Act of 1933. These securities, which represent 0.5% of net assets as of March 31, 2017, are considered liquid and may be resold in transactions exempt from registration, normally to qualified institutional buyers.

^(d)  Reflects separate holdings of the issuer’s common stock traded on different securities exchanges.

^(e)  The Portfolio invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(f)  The rate shown is the annualized seven-day yield at March 31, 2017.

ADR	American Depositary Receipt
REIT	Real Estate Investment Trust
SDR	Swedish Depositary Receipt
TBA	To Be Announced

At March 31, 2017, open futures contracts purchased were as follows:

Futures Contracts	Expiration Date		Number of Contracts		Notional Value		Unrealized Appreciation
Mini MSCI EAFE (long)		06/16/2017		550	$	49,005,000	$	765,974

See accompanying notes to schedules of investments.

119

State Street Master Funds

State Street International Developed Equity Index Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Common Stocks
Australia	$	172,553,526	$	–	$	–	$	172,553,526
Austria		4,984,005		–		–		4,984,005
Belgium		26,402,138		–		–		26,402,138
Chile		708,224		–		–		708,224
China		312,240		–		–		312,240
Denmark		37,193,667		–		–		37,193,667
Finland		21,478,525		–		–		21,478,525
France		223,315,868		–		–		223,315,868
Germany		212,143,503		–		–		212,143,503
Hong Kong		77,565,525		–		–		77,565,525
Ireland		14,744,804		–		–		14,744,804
Israel		12,872,228		–		–		12,872,228
Italy		43,198,781		–		–		43,198,781
Japan		526,596,940		625,543		–		527,222,483
Jordan		584,457		–		–		584,457
Luxembourg		7,572,157		–		–		7,572,157
Macau		907,213		–		–		907,213
Mexico		685,957		–		–		685,957
Netherlands		97,972,853		–		–		97,972,853
New Zealand		3,916,893		–		–		3,916,893
Norway		14,063,828		–		–		14,063,828
Portugal		3,499,772		–		–		3,499,772
Singapore		29,519,812		–		–		29,519,812
South Africa		2,835,099		–		–		2,835,099
Spain		74,773,783		–		–		74,773,783
Sweden		63,946,754		–		–		63,946,754
Switzerland		210,864,168		–		–		210,864,168
United Kingdom		352,136,834		–		–		352,136,834
United States		14,088,880		–		–		14,088,880
Rights
Germany		566,130		–		–		566,130
Short-Term Investment		41,997,206		–		–		41,997,206
Total Investments	$	2,294,001,770	$	625,543	$	–	$	2,294,627,313
Other Financial Instruments:
Futures Contracts(a)		765,974		–		–		765,974
Total Investments and Other Financial Instruments	$	2,294,767,744	$	625,543	$	–	$	2,295,393,287

^(a)  Futures Contracts are valued at unrealized appreciation (depreciation).

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income
State Street Institutional U.S. Government Money Market Fund, Premier Class		39,019,139	$	39,019,139		118,995,424		116,017,357		41,997,206	$	41,997,206	$	50,510
TOTAL			$	39,019,139							$	41,997,206	$	50,510

See accompanying notes to schedules of investments.

120

State Street Institutional Investment Trust

State Street Target Retirement Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS – 99.9%(a)
Domestic Equity – 19.9%
State Street Equity 500 Index II Portfolio		1,185,710	$	14,228,523
State Street Small/Mid Cap Equity Index Portfolio		242,342		2,692,423
				16,920,946
Domestic Fixed Income – 46.8%
SPDR Bloomberg Barclays High Yield Bond ETF		161,325		5,957,732
SPDR Bloomberg Barclays Short Term Corporate Bond ETF		111,339		3,408,087
SPDR Bloomberg Barclays Short Term Treasury ETF		445,851		13,424,574
State Street Aggregate Bond Index Portfolio		1,717,153		17,051,333
				39,841,726
Inflation Linked – 18.1%
SPDR Bloomberg Barclays 1-10 Year TIPS ETF		780,650		15,363,192
International Equity – 10.1%
State Street Global Equity ex-U.S. Index Portfolio		907,379		8,547,511
Real Estate – 5.0%
SPDR Dow Jones Global Real Estate ETF		90,906		4,279,855
TOTAL MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS (Cost $83,624,196)				84,953,230
SHORT-TERM INVESTMENT – 1.1%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(b)(c) (Cost $949,283)		949,283		949,283
TOTAL INVESTMENTS – 101.0% (Cost $84,573,479)				85,902,513
Liabilities in Excess of Other Assets – (1.0)%				(826,550	)
NET ASSETS – 100.0%			$	85,075,963

^(a)  Affiliated funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(b)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(c)  The rate shown is the annualized seven-day yield at March 31, 2017.

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Mutual Funds and Exchange Traded Products
Domestic Equity	$	16,920,946	$	–	$	–	$	16,920,946
Domestic Fixed Income		39,841,726		–		–		39,841,726
Inflation Linked		15,363,192		–		–		15,363,192
International Equity		8,547,511		–		–		8,547,511
Real Estate		4,279,855		–		–		4,279,855
Short-Term Investment		949,283		–		–		949,283
Total Investments	$	85,902,513	$	–	$	–	$	85,902,513

See accompanying notes to schedules of investments.

121

State Street Institutional Investment Trust

State Street Target Retirement Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income		Realized gain (loss)
SPDR Bloomberg Barclays 1-10 Year TIPS ETF		522,357	$	10,107,608		295,440		37,147		780,650	$	15,363,192	$	–	$	5,124
SPDR Bloomberg Barclays High Yield Bond ETF		108,415		3,951,727		56,887		3,977		161,325		5,957,732		56,021		2,266
SPDR Bloomberg Barclays Short Term Corporate Bond ETF		73,883		2,255,648		39,583		2,127		111,339		3,408,087		9,839		(373	)
SPDR Bloomberg Barclays Short Term Treasury ETF		295,962		8,893,658		166,210		16,321		445,851		13,424,574		21,382		(3,319	)
SPDR Dow Jones Global Real Estate ETF		60,746		2,846,557		32,693		2,533		90,906		4,279,855		23,056		(4,598	)
State Street Aggregate Bond Index Portfolio		1,140,689		11,304,230		639,734		63,270		1,717,153		17,051,333		87,119		(20,560	)
State Street Equity 500 Index II Portfolio		828,939		9,383,593		434,794		78,023		1,185,710		14,228,523		–		106,962
State Street Global Equity ex-U.S. Index Portfolio		659,493		5,763,966		338,359		90,473		907,379		8,547,511		–		32,747
State Street Institutional U.S. Government Money Market Fund, Premier Class		106,318		106,318		19,490,157		18,647,192		949,283		949,283		–		–
State Street Small/Mid Cap Equity Index Portfolio		166,447		1,772,660		87,244		11,349		242,342		2,692,423		–		19,867
TOTAL			$	56,385,965							$	85,902,513	$	197,417	$	138,116

See accompanying notes to schedules of investments.

122

State Street Institutional Investment Trust

State Street Target Retirement 2015 Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS – 99.8%(a)
Domestic Equity – 24.0%
State Street Equity 500 Index II Portfolio		2,460,212	$	29,522,541
State Street Small/Mid Cap Equity Index Portfolio		457,421		5,081,943
				34,604,484
Domestic Fixed Income – 37.7%
SPDR Bloomberg Barclays High Yield Bond ETF		273,139		10,087,023
SPDR Bloomberg Barclays Short Term Corporate Bond ETF		76,744		2,349,134
SPDR Bloomberg Barclays Short Term Treasury ETF		301,973		9,092,407
State Street Aggregate Bond Index Portfolio		3,308,768		32,856,069
				54,384,633
Inflation Linked – 20.3%
SPDR Bloomberg Barclays 1-10 Year TIPS ETF		1,487,267		29,269,415
International Equity – 12.8%
State Street Global Equity ex-U.S. Index Portfolio		1,954,652		18,412,818
Real Estate – 5.0%
SPDR Dow Jones Global Real Estate ETF		154,004		7,250,508
TOTAL MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS (Cost $141,707,321)				143,921,858
SHORT-TERM INVESTMENT – 1.4%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(b)(c) (Cost $1,933,974)		1,933,974		1,933,974
TOTAL INVESTMENTS – 101.2% (Cost $143,641,295)				145,855,832
Liabilities in Excess of Other Assets – (1.2)%				(1,663,817	)
NET ASSETS – 100.0%			$	144,192,015

^(a)  Affiliated funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(b)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(c) The rate shown is the annualized seven-day yield at March 31, 2017.

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Mutual Funds and Exchange Traded Products
Domestic Equity	$	34,604,484	$	–	$	–	$	34,604,484
Domestic Fixed Income		54,384,633		–		–		54,384,633
Inflation Linked		29,269,415		–		–		29,269,415
International Equity		18,412,818		–		–		18,412,818
Real Estate		7,250,508		–		–		7,250,508
Short-Term Investment		1,933,974		–		–		1,933,974
Total Investments	$	145,855,832	$	–	$	–	$	145,855,832

See accompanying notes to schedules of investments.

123

State Street Institutional Investment Trust

State Street Target Retirement 2015 Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income		Realized gain (loss)
SPDR Bloomberg Barclays 1-10 Year TIPS ETF		749,088	$	14,494,853		883,875		145,696		1,487,267	$	29,269,414	$	–	$	(56,895	)
SPDR Bloomberg Barclays High Yield Bond ETF		139,926		5,100,303		155,509		22,296		273,139		10,087,023		95,334		11,403
SPDR Bloomberg Barclays Short Term Corporate Bond ETF		35,759		1,091,722		47,197		6,212		76,744		2,349,134		6,232		(1,412	)
SPDR Bloomberg Barclays Short Term Treasury ETF		139,454		4,190,593		186,128		23,609		301,973		9,092,407		13,304		(11,973	)
SPDR Dow Jones Global Real Estate ETF		78,412		3,674,386		88,061		12,469		154,004		7,250,508		38,194		(49,417	)
State Street Aggregate Bond Index Portfolio		1,693,129		16,778,907		1,883,308		267,669		3,308,768		32,856,069		169,403		(100,554	)
State Street Equity 500 Index II Portfolio		1,327,710		15,029,680		1,448,702		316,200		2,460,212		29,522,542		–		229,913
State Street Global Equity ex-U.S. Index Portfolio		1,104,279		9,651,396		1,168,612		318,239		1,954,652		18,412,818		–		184,410
State Street Institutional U.S. Government Money Market Fund, Premier Class		206,879		206,879		38,693,109		36,966,014		1,933,974		1,933,974		–		–
State Street Small/Mid Cap Equity Index Portfolio		246,404		2,624,201		262,148		51,131		457,421		5,081,943		–		55,225
TOTAL			$	72,842,920							$	145,855,832	$	322,467	$	260,700

See accompanying notes to schedules of investments.

124

State Street Institutional Investment Trust

State Street Target Retirement 2020 Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS – 99.8%(a)
Domestic Equity – 32.2%
State Street Equity 500 Index II Portfolio		10,924,032	$	131,088,387
State Street Small/Mid Cap Equity Index Portfolio		2,619,503		29,102,678
				160,191,065
Domestic Fixed Income – 32.1%
SPDR Bloomberg Barclays High Yield Bond ETF		808,719		29,865,993
SPDR Bloomberg Barclays Long Term Treasury ETF		182,523		12,730,979
State Street Aggregate Bond Index Portfolio		11,799,345		117,167,496
				159,764,468
Inflation Linked – 13.4%
SPDR Bloomberg Barclays 1-10 Year TIPS ETF		2,060,712		40,554,812
SPDR Bloomberg Barclays TIPS ETF		460,566		26,238,445
				66,793,257
International Equity – 18.4%
State Street Global Equity ex-U.S. Index Portfolio		9,738,370		91,735,446
Real Estate – 3.7%
SPDR Dow Jones Global Real Estate ETF		385,408		18,145,009
TOTAL MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS (Cost $484,402,363)				496,629,245
SHORT-TERM INVESTMENT – 1.4%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(b)(c) (Cost $7,147,679)		7,147,679		7,147,679
TOTAL INVESTMENTS – 101.2% (Cost $491,550,042)				503,776,924
Liabilities in Excess of Other Assets – (1.2)%				(5,977,548	)
NET ASSETS – 100.0%			$	497,799,376

^(a)  Affiliated funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(b)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(c)  The rate shown is the annualized seven-day yield at March 31, 2017.

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Mutual Funds and Exchange Traded Products
Domestic Equity	$	160,191,065	$	–	$	–	$	160,191,065
Domestic Fixed Income		159,764,468		–		–		159,764,468
Inflation Linked		66,793,257		–		–		66,793,257
International Equity		91,735,446		–		–		91,735,446
Real Estate		18,145,009		–		–		18,145,009
Short-Term Investment		7,147,679		–		–		7,147,679
Total Investments	$	503,776,924	$	–	$	–	$	503,776,924

See accompanying notes to schedules of investments.

125

State Street Institutional Investment Trust

State Street Target Retirement 2020 Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income		Realized gain (loss)
SPDR Bloomberg Barclays 1-10 Year TIPS ETF		851,877	$	16,483,820		1,243,545		34,710		2,060,712	$	40,554,812	$	–	$	14,460
SPDR Bloomberg Barclays High Yield Bond ETF		389,698		14,204,492		424,517		5,496		808,719		29,865,993		271,833		(16,923	)
SPDR Bloomberg Barclays Long Term Treasury ETF		94,754		6,527,603		98,578		10,809		182,523		12,730,979		52,724		(73,740	)
SPDR Bloomberg Barclays TIPS ETF		253,001		14,216,430		263,279		55,714		460,566		26,238,445		9,852		(38,230	)
SPDR Dow Jones Global Real Estate ETF		178,473		8,363,245		206,935		–		385,408		18,145,009		90,644		–
State Street Aggregate Bond Index Portfolio		5,500,578		54,510,728		6,478,365		179,598		11,799,345		117,167,497		569,103		(57,033	)
State Street Equity 500 Index II Portfolio		5,538,453		62,695,292		5,938,057		552,478		10,924,032		131,088,386		–		854,865
State Street Global Equity ex-U.S. Index Portfolio		5,133,472		44,866,542		5,366,030		761,132		9,738,370		91,735,446		–		594,318
State Street Institutional U.S. Government Money Market Fund, Premier Class		275,062		275,062		91,810,290		84,937,673		7,147,679		7,147,679		–		–
State Street Small/Mid Cap Equity Index Portfolio		1,320,755		14,066,036		1,371,221		72,473		2,619,503		29,102,678		–		138,260
TOTAL			$	236,209,250							$	503,776,924	$	994,156	$	1,415,977

See accompanying notes to schedules of investments.

126

State Street Institutional Investment Trust

State Street Target Retirement 2025 Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS – 99.6%(a)
Domestic Equity – 40.4%
State Street Equity 500 Index II Portfolio		12,908,960	$	154,907,520
State Street Small/Mid Cap Equity Index Portfolio		3,608,066		40,085,618
				194,993,138
Domestic Fixed Income – 27.7%
SPDR Bloomberg Barclays High Yield Bond ETF		714,018		26,368,685
SPDR Bloomberg Barclays Long Term Treasury ETF		522,994		36,478,831
State Street Aggregate Bond Index Portfolio		7,106,374		70,566,295
				133,413,811
Inflation Linked – 6.1%
SPDR Bloomberg Barclays TIPS ETF		511,647		29,148,530
International Equity – 24.3%
State Street Global Equity ex-U.S. Index Portfolio		12,451,963		117,297,494
Real Estate – 1.1%
SPDR Dow Jones Global Real Estate ETF		115,844		5,453,935
TOTAL MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS (Cost $465,281,892)				480,306,908
SHORT-TERM INVESTMENT – 1.5%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(b)(c) (Cost $7,153,087)		7,153,087		7,153,087
TOTAL INVESTMENTS – 101.1% (Cost $472,434,979)				487,459,995
Liabilities in Excess of Other Assets – (1.1)%				(5,247,848	)
NET ASSETS – 100.0%			$	482,212,147

^(a)  Affiliated funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(b)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(c)  The rate shown is the annualized seven-day yield at March 31, 2017.

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Mutual Funds and Exchange Traded Products
Domestic Equity	$	194,993,138	$	–	$	–	$	194,993,138
Domestic Fixed Income		133,413,811		–		–		133,413,811
Inflation Linked		29,148,530		–		–		29,148,530
International Equity		117,297,494		–		–		117,297,494
Real Estate		5,453,935		–		–		5,453,935
Short-Term Investment		7,153,087		–		–		7,153,087
Total Investments	$	487,459,995	$	–	$	–	$	487,459,995

See accompanying notes to schedules of investments.

127

State Street Institutional Investment Trust

State Street Target Retirement 2025 Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income		Realized gain (loss)
SPDR Bloomberg Barclays High Yield Bond ETF		303,086	$	11,047,485		412,024		1,092		714,018	$	26,368,685	$	226,012	$	2,393
SPDR Bloomberg Barclays Long Term Treasury ETF		235,114		16,197,004		291,482		3,602		522,994		36,478,831		140,122		(15,213	)
SPDR Bloomberg Barclays TIPS ETF		211,621		11,891,238		300,026		–		511,647		29,148,530		8,869		–
SPDR Dow Jones Global Real Estate ETF		44,954		2,106,544		70,890		–		115,844		5,453,935		24,415		–
State Street Aggregate Bond Index Portfolio		3,053,373		30,258,930		4,080,213		27,212		7,106,374		70,566,295		340,256		(4,826	)
State Street Equity 500 Index II Portfolio		5,917,934		66,991,012		7,322,716		331,690		12,908,960		154,907,520		–		643,196
State Street Global Equity ex-U.S. Index Portfolio		5,955,335		52,049,631		7,207,296		710,668		12,451,963		117,297,494		–		662,165
State Street Institutional U.S. Government Money Market Fund, Premier Class		476,724		476,724		83,284,030		76,607,667		7,153,087		7,153,087		–		–
State Street Small/Mid Cap Equity Index Portfolio		1,640,714		17,473,607		1,995,095		27,743		3,608,066		40,085,618		–		49,775
TOTAL			$	208,492,175							$	487,459,995	$	739,674	$	1,337,490

See accompanying notes to schedules of investments.

128

State Street Institutional Investment Trust

State Street Target Retirement 2030 Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS – 99.6%(a)
Domestic Equity – 45.5%
State Street Equity 500 Index II Portfolio		13,768,169	$	165,218,024
State Street Small/Mid Cap Equity Index Portfolio		4,474,453		49,711,170
				214,929,194
Domestic Fixed Income – 24.4%
SPDR Bloomberg Barclays High Yield Bond ETF		313,158		11,564,925
SPDR Bloomberg Barclays Long Term Treasury ETF		665,135		46,393,166
State Street Aggregate Bond Index Portfolio		5,772,315		57,319,093
				115,277,184
Inflation Linked – 1.8%
SPDR Bloomberg Barclays TIPS ETF		149,650		8,525,560
International Equity – 27.9%
State Street Global Equity ex-U.S. Index Portfolio		13,971,533		131,611,837
TOTAL MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS (Cost $451,512,882)				470,343,775
SHORT-TERM INVESTMENT – 1.6%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(b)(c) (Cost $7,439,029)		7,439,029		7,439,029
TOTAL INVESTMENTS – 101.2% (Cost $458,951,911)				477,782,804
Liabilities in Excess of Other Assets – (1.2)%				(5,831,283	)
NET ASSETS – 100.0%			$	471,951,521

^(a)  Affiliated funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(b)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(c)  The rate shown is the annualized seven-day yield at March 31, 2017.

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Mutual Funds and Exchange Traded Products
Domestic Equity	$	214,929,194	$	–	$	–	$	214,929,194
Domestic Fixed Income		115,277,184		–		–		115,277,184
Inflation Linked		8,525,560		–		–		8,525,560
International Equity		131,611,837		–		–		131,611,837
Short-Term Investment		7,439,029		–		–		7,439,029
Total Investments	$	477,782,804	$	–	$	–	$	477,782,804

See accompanying notes to schedules of investments.

129

State Street Institutional Investment Trust

State Street Target Retirement 2030 Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income		Realized gain (loss)
SPDR Bloomberg Barclays High Yield Bond ETF		142,960	$	5,210,892		170,744		546		313,158	$	11,564,925	$	95,576	$	1,366
SPDR Bloomberg Barclays Long Term Treasury ETF		321,497		22,147,928		348,958		5,320		665,135		46,393,166		172,362		4,489
SPDR Bloomberg Barclays TIPS ETF		68,601		3,854,773		81,049		–		149,650		8,525,560		2,562		–
State Street Aggregate Bond Index Portfolio		2,746,525		27,218,059		3,056,036		30,246		5,772,315		57,319,093		275,058		(9,712	)
State Street Equity 500 Index II Portfolio		6,991,050		79,138,687		6,993,160		216,041		13,768,169		165,218,024		–		220,761
State Street Global Equity ex-U.S. Index Portfolio		7,389,682		64,585,823		7,247,838		665,987		13,971,533		131,611,837		–		(192,750	)
State Street Institutional U.S. Government Money Market Fund, Premier Class		519,504		519,504		63,815,016		56,895,491		7,439,029		7,439,029		–		–
State Street Small/Mid Cap Equity Index Portfolio		2,246,580		23,926,080		2,245,115		17,242		4,474,453		49,711,170		–		17,584
TOTAL			$	226,601,746							$	477,782,804	$	545,558	$	41,738

See accompanying notes to schedules of investments.

130

State Street Institutional Investment Trust

State Street Target Retirement 2035 Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS – 99.7%(a)
Domestic Equity – 49.8%
State Street Equity 500 Index II Portfolio		10,493,715	$	125,924,575
State Street Small/Mid Cap Equity Index Portfolio		3,887,368		43,188,657
				169,113,232
Domestic Fixed Income – 19.1%
SPDR Bloomberg Barclays Long Term Treasury ETF		478,433		33,370,702
State Street Aggregate Bond Index Portfolio		3,167,113		31,449,434
				64,820,136
International Equity – 30.8%
State Street Global Equity ex-U.S. Index Portfolio		11,073,358		104,311,030
TOTAL MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS (Cost $323,645,930)				338,244,398
SHORT-TERM INVESTMENT – 1.6%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(b)(c) (Cost $5,613,192)		5,613,192		5,613,192
TOTAL INVESTMENTS – 101.3% (Cost $329,259,122)				343,857,590
Liabilities in Excess of Other Assets – (1.3)%				(4,462,392	)
NET ASSETS – 100.0%			$	339,395,198

^(a)  Affiliated funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(b)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(c)  The rate shown is the annualized seven-day yield at March 31, 2017.

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Mutual Funds and Exchange Traded Products
Domestic Equity	$	169,113,232	$	–	$	–	$	169,113,232
Domestic Fixed Income		64,820,136		–		–		64,820,136
International Equity		104,311,030		–		–		104,311,030
Short-Term Investment		5,613,192		–		–		5,613,192
Total Investments	$	343,857,590	$	–	$	–	$	343,857,590

See accompanying notes to schedules of investments.

131

State Street Institutional Investment Trust

State Street Target Retirement 2035 Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income		Realized gain (loss)
SPDR Bloomberg Barclays Long Term Treasury ETF		235,292	$	16,209,266		246,444		3,303		478,433	$	33,370,702	$	122,522	$	(14,008	)
State Street Aggregate Bond Index Portfolio		1,507,436		14,938,693		1,669,734		10,057		3,167,113		31,449,434		147,842		(1,324	)
State Street Equity 500 Index II Portfolio		5,409,606		61,236,743		5,206,659		122,550		10,493,715		125,924,575		–		140,655
State Street Global Equity ex-U.S. Index Portfolio		5,944,761		51,957,210		5,547,122		418,525		11,073,358		104,311,030		–		336,754
State Street Institutional U.S. Government Money Market Fund, Premier Class		415,810		415,810		42,872,926		37,675,544		5,613,192		5,613,192		–		–
State Street Small/Mid Cap Equity Index Portfolio		1,982,769		21,116,491		1,922,093		17,494		3,887,368		43,188,657		–		43,098
TOTAL			$	165,874,213							$	343,857,590	$	270,364	$	505,175

See accompanying notes to schedules of investments.

132

State Street Institutional Investment Trust

State Street Target Retirement 2040 Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS – 99.7%(a)
Domestic Equity – 52.9%
State Street Equity 500 Index II Portfolio		9,099,412	$	109,192,941
State Street Small/Mid Cap Equity Index Portfolio		3,908,389		43,422,198
				152,615,139
Domestic Fixed Income – 14.1%
SPDR Bloomberg Barclays Long Term Treasury ETF		407,225		28,403,944
State Street Aggregate Bond Index Portfolio		1,238,428		12,297,587
				40,701,531
International Equity – 32.7%
State Street Global Equity ex-U.S. Index Portfolio		10,033,760		94,518,016
TOTAL MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS (Cost $273,245,141)				287,834,686
SHORT-TERM INVESTMENT – 1.8%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(b)(c) (Cost $5,377,358)		5,377,358		5,377,358
TOTAL INVESTMENTS – 101.5% (Cost $278,622,499)				293,212,044
Liabilities in Excess of Other Assets – (1.5)%				(4,432,740	)
NET ASSETS – 100.0%			$	288,779,304

^(a)  Affiliated funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(b)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(c)  The rate shown is the annualized seven-day yield at March 31, 2017.

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Mutual Funds and Exchange Traded Products
Domestic Equity	$	152,615,139	$	–	$	–	$	152,615,139
Domestic Fixed Income		40,701,531		–		–		40,701,531
International Equity		94,518,016		–		–		94,518,016
Short-Term Investment		5,377,358		–		–		5,377,358
Total Investments	$	293,212,044	$	–	$	–	$	293,212,044

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income		Realized gain (loss)
SPDR Bloomberg Barclays Long Term Treasury ETF		204,304	$	14,074,503		202,921		–		407,225	$	28,403,944	$	104,654	$	–
State Street Aggregate Bond Index Portfolio		581,656		5,764,211		656,772		–		1,238,428		12,297,587		55,582		–
State Street Equity 500 Index II Portfolio		4,792,971		54,256,435		4,375,233		68,792		9,099,412		109,192,941		–		63,723
State Street Global Equity ex-U.S. Index Portfolio		5,494,710		48,023,763		4,914,334		375,284		10,033,760		94,518,016		–		(126,995	)
State Street Institutional U.S. Government Money Market Fund, Premier Class		383,493		383,493		35,376,779		30,382,914		5,377,358		5,377,358		1,453		–
State Street Small/Mid Cap Equity Index Portfolio		2,031,247		21,632,779		1,883,587		6,445		3,908,389		43,422,198		–		5,551
TOTAL			$	144,135,184							$	293,212,044	$	161,689	$	(57,721	)

See accompanying notes to schedules of investments.

133

State Street Institutional Investment Trust

State Street Target Retirement 2045 Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS – 99.7%(a)
Domestic Equity – 55.4%
State Street Equity 500 Index II Portfolio		5,612,597	$	67,351,167
State Street Small/Mid Cap Equity Index Portfolio		2,712,629		30,137,303
				97,488,470
Domestic Fixed Income – 9.8%
SPDR Bloomberg Barclays Long Term Treasury ETF		248,070		17,302,883
International Equity – 34.5%
State Street Global Equity ex-U.S. Index Portfolio		6,432,004		60,589,474
TOTAL MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS (Cost $166,543,657)				175,380,827
SHORT-TERM INVESTMENT – 3.0%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(b)(c) (Cost $5,248,652)		5,248,652		5,248,652
TOTAL INVESTMENTS – 102.7% (Cost $171,792,309)				180,629,479
Liabilities in Excess of Other Assets – (2.7)%				(4,696,879	)
NET ASSETS – 100.0%			$	175,932,600

^(a)  Affiliated funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(b)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(c)  The rate shown is the annualized seven-day yield at March 31, 2017.

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Mutual Funds and Exchange Traded Products
Domestic Equity	$	97,488,470	$	–	$	–	$	97,488,470
Domestic Fixed Income		17,302,883		–		–		17,302,883
International Equity		60,589,474		–		–		60,589,474
Short-Term Investment		5,248,652		–		–		5,248,652
Total Investments	$	180,629,479	$	–	$	–	$	180,629,479

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income		Realized gain (loss)
SPDR Bloomberg Barclays Long Term Treasury ETF		109,425	$	7,538,288		139,811		1,166		248,070	$	17,302,883	$	62,009	$	(3,970	)
State Street Equity 500 Index II Portfolio		2,591,396		29,334,598		3,062,302		41,101		5,612,597		67,351,167		–		44,073
State Street Global Equity ex-U.S. Index Portfolio		3,085,449		26,966,824		3,558,610		212,055		6,432,004		60,589,474		–		101,145
State Street Institutional U.S. Government Money Market Fund, Premier Class		186,283		186,283		27,543,378		22,481,009		5,248,652		5,248,652		938		–
State Street Small/Mid Cap Equity Index Portfolio		1,230,788		13,107,891		1,489,108		7,267		2,712,629		30,137,303		–		10,863
TOTAL			$	77,133,884							$	180,629,479	$	62,947	$	152,111

See accompanying notes to schedules of investments.

134

State Street Institutional Investment Trust

State Street Target Retirement 2050 Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS – 99.6%(a)
Domestic Equity – 55.4%
State Street Equity 500 Index II Portfolio		4,245,701	$	50,948,410
State Street Small/Mid Cap Equity Index Portfolio		2,051,620		22,793,498
				73,741,908
Domestic Fixed Income – 9.8%
SPDR Bloomberg Barclays Long Term Treasury ETF		187,752		13,095,702
International Equity – 34.4%
State Street Global Equity ex-U.S. Index Portfolio		4,864,647		45,824,971
TOTAL MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS (Cost $126,180,022)				132,662,581
SHORT-TERM INVESTMENT – 3.9%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(b)(c) (Cost $5,138,413)		5,138,413		5,138,413
TOTAL INVESTMENTS – 103.5% (Cost $131,318,435)				137,800,994
Liabilities in Excess of Other Assets – (3.5)%				(4,630,504	)
NET ASSETS – 100.0%			$	133,170,490

^(a)  Affiliated funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(b)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(c)  The rate shown is the annualized seven-day yield at March 31, 2017.

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Mutual Funds and Exchange Traded Products
Domestic Equity	$	73,741,908	$	–	$	–	$	73,741,908
Domestic Fixed Income		13,095,702		–		–		13,095,702
International Equity		45,824,971		–		–		45,824,971
Short-Term Investment		5,138,413		–		–		5,138,413
TOTAL INVESTMENTS	$	137,800,994	$	–	$	–	$	137,800,994

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income		Realized gain (loss)
SPDR Bloomberg Barclays Long Term Treasury ETF		68,486	$	4,718,001		119,266		–		187,752	$	13,095,702	$	46,921	$	–
State Street Equity 500 Index II Portfolio		1,623,760		18,380,960		2,635,390		13,449		4,245,701		50,948,410		–		11,814
State Street Global Equity ex-U.S. Index Portfolio		1,931,105		16,877,862		3,074,290		140,748		4,864,647		45,824,971		–		23,100
State Street Institutional U.S. Government Money Market Fund, Premier Class		151,225		151,225		23,081,101		18,093,913		5,138,413		5,138,413		760		–
State Street Small/Mid Cap Equity Index Portfolio		770,307		8,203,774		1,285,902		4,589		2,051,620		22,793,498		–		5,992
TOTAL			$	48,331,822							$	137,800,994	$	47,681	$	40,906

See accompanying notes to schedules of investments.

135

State Street Institutional Investment Trust

State Street Target Retirement 2055 Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS – 99.5%(a)
Domestic Equity – 55.3%
State Street Equity 500 Index II Portfolio		1,318,079	$	15,816,946
State Street Small/Mid Cap Equity Index Portfolio		636,941		7,076,420
				22,893,366
Domestic Fixed Income – 9.8%
SPDR Bloomberg Barclays Long Term Treasury ETF		58,252		4,063,077
International Equity – 34.4%
State Street Global Equity ex-U.S. Index Portfolio		1,510,407		14,228,033
TOTAL MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS (Cost $39,223,463)				41,184,476
SHORT-TERM INVESTMENT – 7.9%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(b)(c) (Cost $3,281,035)		3,281,035		3,281,035
TOTAL INVESTMENTS – 107.4% (Cost $42,504,498)				44,465,511
Liabilities in Excess of Other Assets – (7.4)%				(3,065,969	)
NET ASSETS – 100.0%			$	41,399,542

^(a)  Affiliated funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(b)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(c)  The rate shown is the annualized seven-day yield at March 31, 2017.

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Mutual Funds and Exchange Traded Products
Domestic Equity	$	22,893,366	$	–	$	–	$	22,893,366
Domestic Fixed Income		4,063,077		–		–		4,063,077
International Equity		14,228,033		–		–		14,228,033
Short-Term Investment		3,281,035		–		–		3,281,035
Total Investments	$	44,465,511	$	–	$	–	$	44,465,511

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income		Realized gain (loss)
SPDR Bloomberg Barclays Long Term Treasury ETF		26,978	$	1,858,515		31,602		328		58,252	$	4,063,077	$	13,224	$	(101	)
State Street Equity 500 Index II Portfolio		638,889		7,232,227		687,976		8,786		1,318,079		15,816,946		–		8,829
State Street Global Equity ex-U.S. Index Portfolio		760,683		6,648,369		794,515		44,791		1,510,407		14,228,033		–		(15,224	)
State Street Institutional U.S. Government Money Market Fund, Premier Class		40,625		40,625		10,702,558		7,462,148		3,281,035		3,281,035		306		–
State Street Small/Mid Cap Equity Index Portfolio		303,441		3,231,648		335,963		2,463		636,941		7,076,420		–		2,374
TOTAL			$	19,011,384							$	44,465,511	$	13,530	$	(4,122	)

See accompanying notes to schedules of investments.

136

State Street Institutional Investment Trust

State Street Target Retirement 2060 Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS – 99.9%(a)
Domestic Equity – 55.6%
State Street Equity 500 Index II Portfolio		159,070	$	1,908,837
State Street Small/Mid Cap Equity Index Portfolio		76,887		854,215
				2,763,052
Domestic Fixed Income – 9.8%
SPDR Bloomberg Barclays Long Term Treasury ETF		6,997		488,041
International Equity – 34.5%
State Street Global Equity ex-U.S. Index Portfolio		182,231		1,716,619
TOTAL MUTUAL FUNDS AND EXCHANGE TRADED PRODUCTS (Cost $4,718,175)				4,967,712
SHORT-TERM INVESTMENT – 1.2%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(b)(c) (Cost $59,291)		59,291		59,291
TOTAL INVESTMENTS – 101.1% (Cost $4,777,466)				5,027,003
Liabilities In Excess of Other Assets – (1.1)%				(55,187	)
NET ASSETS – 100.0%			$	4,971,816

^(a)  Affiliated funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(b)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(c)  The rate shown is the annualized seven-day yield at March 31, 2017.

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Mutual Funds and Exchange Traded Products
Domestic Equity	$	2,763,052	$	–	$	–	$	2,763,052
Domestic Fixed Income		488,041		–		–		488,041
International Equity		1,716,619		–		–		1,716,619
Short-Term Investment		59,291		–		–		59,291
Total Investments	$	5,027,003	$	–	$	–	$	5,027,003

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income		Realized gain (loss)
SPDR Bloomberg Barclays Long Term Treasury ETF		5,203	$	358,434		2,190		396		6,997	$	488,041	$	1,699	$	(4,618	)
State Street Equity 500 Index II Portfolio		123,213		1,394,774		42,005		6,148		159,070		1,908,837		–		6,483
State Street Global Equity ex-U.S. Index Portfolio		145,739		1,273,762		48,939		12,447		182,231		1,716,619		–		10,347
State Street Institutional U.S. Government Money Market Fund, Premier Class		–		–		985,642		926,351		59,291		59,291		35		–
State Street Small/Mid Cap Equity Index Portfolio		58,520		623,241		21,143		2,776		76,887		854,215		–		3,781
TOTAL			$	3,650,211							$	5,027,003	$	1,734	$	15,993

See accompanying notes to schedules of investments.

137

State Street Institutional Investment Trust

State Street Asia Pacific Value Spotlight Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – 94.0%
Australia – 6.4%
QBE Insurance Group, Ltd.		6,318	$	62,126
Woodside Petroleum, Ltd.		2,896		70,871
				132,997
China – 13.2%
ANTA Sports Products, Ltd.		20,000		55,330
China Construction Bank Corp. Class H		80,000		64,338
China Mobile, Ltd.		5,000		54,719
PetroChina Co., Ltd. Class H		76,000		55,644
Shanghai Industrial Holdings, Ltd.		15,000		44,104
				274,135
Hong Kong – 8.0%
Techtronic Industries Co., Ltd.		15,000		60,703
WH Group, Ltd.(a)		123,000		106,041
				166,744
Japan – 40.8%
Alfresa Holdings Corp.		4,800		83,094
Hirose Electric Co., Ltd.		500		69,102
ITOCHU Corp.		5,300		75,150
Kansai Paint Co., Ltd.		2,700		57,257
KDDI Corp.		2,300		60,312
Kinden Corp.		3,800		52,995
Komatsu, Ltd.		2,100		54,681
Kurita Water Industries, Ltd.		1,600		38,668
Mitsubishi UFJ Financial Group, Inc.		8,000		50,234
SMC Corp.		200		59,086
Sony Financial Holdings, Inc.		4,600		73,853
Sumitomo Mitsui Financial Group, Inc.		1,800		65,342
Toyota Motor Corp.		1,100		59,645
Trend Micro, Inc.		1,100		48,865
				848,284
Singapore – 2.6%
United Overseas Bank, Ltd.		3,400		53,799
South Korea – 15.9%
Hankook Tire Co., Ltd.		1,216		59,261
KT&G Corp.		780		68,005
Samsung Electronics Co., Ltd. Preference Shares		70		100,340
Samsung Fire & Marine Insurance Co., Ltd.		156		37,385
Shinhan Financial Group Co., Ltd.		1,599		66,631
				331,622
Taiwan – 4.7%
Taiwan Semiconductor Manufacturing Co., Ltd. ADR		3,000		98,520
United Kingdom – 2.4%
Standard Chartered PLC(b)		5,200		49,682
TOTAL COMMON STOCKS (Cost $1,907,268)				1,955,783
SHORT-TERM INVESTMENT – 5.5%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(c)(d) (Cost $113,470)		113,470		113,470
TOTAL INVESTMENTS – 99.5% (Cost $2,020,738)				2,069,253
Other Assets In Excess of Liabilities – 0.5%				10,427
NET ASSETS – 100.0%			$	2,079,680

^(a) Security purchased pursuant to Rule 144A of the Securities Act of 1933. This security, which represents 5.1% of net assets as of March 31, 2017, is considered liquid and may be resold in transactions exempt from registration, normally to qualified institutional buyers.

^(b)  Non-income producing security.

^(c)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(d)  The rate shown is the annualized seven-day yield at March 31, 2017.

ADR American Depositary Receipt

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Common Stocks
Australia	$	132,997	$	–	$	–	$	132,997
China		274,135		–		–		274,135
Hong Kong		166,744		–		–		166,744
Japan		848,284		–		–		848,284
Singapore		53,799		–		–		53,799
South Korea		331,622		–		–		331,622
Taiwan		98,520		–		–		98,520
United Kingdom		49,682		–		–		49,682
Short-Term Investment		113,470		–		–		113,470
Total Investments	$	2,069,253	$	–	$	–	$	2,069,253

See accompanying notes to schedules of investments.

138

State Street Institutional Investment Trust

State Street Asia Pacific Value Spotlight Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income
State Street Institutional U.S. Government Money Market Fund, Premier Class		100,447	$	100,447		247,913		234,890		113,470	$	113,470	$	117
TOTAL			$	100,447							$	113,470	$	117

See accompanying notes to schedules of investments.

139

State Street Institutional Investment Trust

State Street European Value Spotlight Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – 92.1%
Austria – 5.4%
ANDRITZ AG		655	$	32,846
Erste Group Bank AG		857		27,979
				60,825
France – 18.8%
Alstom SA(a)		1,166		34,937
AXA SA		1,606		41,663
BNP Paribas SA		366		24,439
Cie Generale des Etablissements Michelin		192		23,380
Sanofi		428		38,736
TOTAL SA		650		32,963
Vallourec SA(a)		2,520		16,775
				212,893
Germany – 8.5%
BASF SE		119		11,827
Continental AG		123		27,034
Deutsche Bank AG(a)		1,736		29,986
Schaeffler AG, Preference Shares		1,560		27,497
				96,344
Hungary – 3.0%
Richter Gedeon Nyrt		1,483		33,744
Ireland – 2.0%
Bank of Ireland(a)		91,313		22,951
Italy – 7.0%
Assicurazioni Generali SpA		2,602		41,466
Eni SpA		2,301		37,777
				79,243
Netherlands – 10.0%
Akzo Nobel NV		321		26,687
ASM International NV		528		29,716
Euronext NV(b)		610		26,687
Koninklijke DSM NV		452		30,655
				113,745
Spain – 3.7%
ACS Actividades de Construccion y Servicios SA		1,233		42,062
Sweden – 3.0%
Telefonaktiebolaget LM Ericsson Class B		5,001		33,496
Switzerland – 14.4%
ABB, Ltd.		915		21,418
Credit Suisse Group AG(a)		2,892		43,050
Novartis AG		437		32,460
Roche Holding AG		127		32,456
Swatch Group AG		96		34,402
				163,786
United Kingdom – 16.3%
Barclays PLC		11,374		32,015
BT Group PLC		7,842		31,203
CNH Industrial NV		2,445		23,640
easyJet PLC		3,090		39,643
Standard Chartered PLC(a)		4,179		39,872
Tullow Oil PLC(a)		6,394		18,709
				185,082
TOTAL COMMON STOCKS (Cost $954,667)				1,044,171
RIGHTS – 0.4%
Germany – 0.4%
Deutsche Bank AG (expiring 4/6/17)(a) (Cost $0)		1,736		4,159
SHORT-TERM INVESTMENT – 8.4%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62% (c)(d) (Cost $94,762)		94,762		94,762
TOTAL INVESTMENTS – 100.9% (Cost $1,049,429)				1,143,092
Liabilities In Excess of Other Assets – (0.9)%				(9,888	)
NET ASSETS – 100.0%			$	1,133,204

^(a)  Non-income producing security.

^(b)  Security purchased pursuant to Rule 144A of the Securities Act of 1933. This security, which represents 2.4% of net assets as of March 31, 2017, is considered liquid and may be resold in transactions exempt from registration, normally to qualified institutional buyers.

^(c)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(d)  The rate shown is the annualized seven-day yield at March 31, 2017.

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Common Stocks
Austria	$	60,825	$	–	$	–	$	60,825
France		212,893		–		–		212,893
Germany		96,344		–		–		96,344
Hungary		33,744		–		–		33,744

See accompanying notes to schedules of investments.

140

State Street Institutional Investment Trust

State Street European Value Spotlight Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Ireland	$	22,951	$	–	$	–	$	22,951
Italy		79,243		–		–		79,243
Netherlands		113,745		–		–		113,745
Spain		42,062		–		–		42,062
Sweden		33,496		–		–		33,496
Switzerland		163,786		–		–		163,786
United Kingdom		185,082		–		–		185,082
Rights
Germany		4,159		–		–		4,159
Short-Term Investment		94,762		–		–		94,762
Total Investments	$	1,143,092	$	–	$	–	$	1,143,092

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income
State Street Institutional U.S. Government Money Market Fund, Premier Class		41,566	$	41,566		149,437		96,241		94,762	$	94,762	$	91
TOTAL			$	41,566							$	94,762	$	91

See accompanying notes to schedules of investments.

141

State Street Institutional Investment Trust

State Street Global Value Spotlight Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – 95.1%
Australia – 2.9%
Woodside Petroleum, Ltd.		2,710	$	66,320
China – 2.4%
China Construction Bank Corp. Class H		66,000		53,079
France – 2.6%
Vallourec SA(a)		8,797		58,560
Hong Kong – 3.2%
WH Group, Ltd.(b)		83,000		71,556
Hungary – 2.4%
Richter Gedeon Nyrt		2,404		54,701
Italy – 2.6%
Eni SpA		3,593		58,988
Japan – 7.8%
Alfresa Holdings Corp.		3,800		65,783
Sony Financial Holdings, Inc.		3,600		57,798
Trend Micro, Inc.		1,200		53,307
				176,888
Netherlands – 2.7%
Koninklijke DSM NV		906		61,445
Panama – 2.5%
Copa Holdings SA Class A		500		56,125
South Korea – 7.8%
KT&G Corp.		712		62,076
Samsung Electronics Co., Ltd. Preference Shares		37		53,037
Samsung Life Insurance Co., Ltd.		619		60,057
				175,170
Spain – 2.8%
ACS Actividades de Construccion y Servicios SA		1,864		63,587
Sweden – 5.2%
Telefonaktiebolaget LM Ericsson Class B		10,632		71,211
Volvo AB Class B		3,179		47,107
				118,318
Switzerland – 7.6%
ABB, Ltd.		2,221		51,989
Credit Suisse Group AG(a)		4,436		66,034
Swatch Group AG		151		54,112
				172,135
Thailand – 2.9%
Bangkok Bank PCL		12,200		66,037
United Kingdom – 8.0%
Barclays PLC		20,627		58,060
easyJet PLC		4,751		60,954
Standard Chartered PLC(a)		6,325		60,346
				179,360
United States – 31.7%
AGCO Corp.		774		46,579
Cigna Corp.		445		65,188
Citigroup, Inc.		958		57,307
EQT Corp.		1,123		68,615
McKesson Corp.		422		62,566
MetLife, Inc.		1,130		59,687
Michaels Cos., Inc.(a)		2,723		60,968
Mosaic Co.		2,177		63,525
Oracle Corp.		1,295		57,770
Owens-Illinois, Inc.(a)		2,935		59,815
Tempur Sealy International, Inc.(a)		1,154		53,615
United Technologies Corp.		538		60,369
				716,004
TOTAL COMMON STOCKS (Cost $1,956,823)				2,148,273
SHORT-TERM INVESTMENT – 5.1%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(c)(d) (Cost $113,919)		113,919		113,919
TOTAL INVESTMENTS – 100.2% (Cost $2,070,742)				2,262,192
Liabilities in Excess of Other Assets – (0.2)%				(4,274	)
NET ASSETS – 100.0%			$	2,257,918

^(a)  Non-income producing security.

^(b)  Security purchased pursuant to Rule 144A of the Securities Act of 1933. This security, which represents 3.2% of net assets as of March 31, 2017, is considered liquid and may be resold in transactions exempt from registration, normally to qualified institutional buyers.

^(c)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(d)  The rate shown is the annualized seven-day yield at March 31, 2017.

See accompanying notes to schedules of investments.

142

State Street Institutional Investment Trust

State Street Global Value Spotlight Fund

Schedule of Investments – (continued)

March 31, 2017 (Unaudited)

At March 31, 2017, open forward foreign currency exchange contracts were as follows:

Counterparty	Amount Sold			Amount Bought			Settlement Date		Net  Unrealized Appreciation/ (Depreciation)
Barclays Capital		SEK	259,324		USD	29,000		06/01/2017	$	(125	)
HSBC Bank plc		SEK	259,475		USD	29,000		06/01/2017		(141	)
JP Morgan Chase Bank, N.A.		SEK	259,439		USD	29,000		06/01/2017		(137	)
Royal Bank of Canada		CHF	29,096		USD	29,000		06/01/2017		(165	)
Societe Generale		CHF	29,098		USD	29,000		06/01/2017		(167	)
UBS AG		CHF	29,094		USD	29,000		06/01/2017		(163	)
Total									$	(898	)

CHF	Swiss franc
SEK	Swedish krona
USD	U.S. dollar

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs			Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Common Stocks
Australia	$	66,320	$	–		$	–	$	66,320
China		53,079		–			–		53,079
France		58,560		–			–		58,560
Hong Kong		71,556		–			–		71,556
Hungary		54,701		–			–		54,701
Italy		58,988		–			–		58,988
Japan		176,888		–			–		176,888
Netherlands		61,445		–			–		61,445
Panama		56,125		–			–		56,125
South Korea		175,170		–			–		175,170
Spain		63,587		–			–		63,587
Sweden		118,318		–			–		118,318
Switzerland		172,135		–			–		172,135
Thailand		66,037		–			–		66,037
United Kingdom		179,360		–			–		179,360
United States		716,004		–			–		716,004
Short-Term Investment		113,919		–			–		113,919
Total Investments	$	2,262,192	$	–		$	–	$	2,262,192
Liabilities:
Other Financial Instruments:
Forward Foreign Currency Exchange Contracts(a)	$	–	$	(898	)	$	–	$	(898	)
Total Other Financial Instruments	$	–	$	(898	)	$	–	$	(898	)

^(a)  Forward Foreign Currency Exchange Contracts are valued at unrealized appreciation (depreciation).

See accompanying notes to schedules of investments.

143

State Street Institutional Investment Trust

State Street Global Value Spotlight Fund

Schedule of Investments – (continued)

March 31, 2017 (Unaudited)

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income
State Street Institutional U.S. Government Money Market Fund, Premier Class		120,334	$	120,334		195,607		202,022		113,919	$	113,919	$	127
TOTAL			$	120,334							$	113,919	$	127

See accompanying notes to schedules of investments.

144

State Street Institutional Investment Trust

State Street International Value Spotlight Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – 95.3%
Australia – 5.9%
Incitec Pivot, Ltd.		24,807	$	71,154
Woodside Petroleum, Ltd.		2,992		73,221
				144,375
China – 8.3%
China Construction Bank Corp. Class H		91,000		73,184
PetroChina Co., Ltd. Class H		90,000		65,895
Shanghai Industrial Holdings, Ltd.		22,000		64,685
				203,764
France – 9.3%
Alstom SA(a)		2,482		74,369
Sanofi		775		70,142
Vallourec SA(a)		12,360		82,279
				226,790
Germany – 6.3%
Deutsche Bank AG(a)		3,947		68,177
Schaeffler AG, Preference Shares		4,818		84,923
				153,100
Hong Kong – 3.0%
WH Group, Ltd.(b)		84,500		72,850
Hungary – 2.5%
Richter Gedeon Nyrt		2,742		62,392
Israel – 2.2%
Teva Pharmaceutical Industries, Ltd. ADR		1,704		54,681
Italy – 6.1%
Assicurazioni Generali SpA		4,910		78,247
Eni SpA		4,282		70,300
				148,547
Japan – 13.4%
Alfresa Holdings Corp.		3,900		67,514
Hirose Electric Co., Ltd.		500		69,102
Sony Financial Holdings, Inc.		4,000		64,220
Sumitomo Mitsui Financial Group, Inc.		1,800		65,341
Sumitomo Mitsui Trust Holdings, Inc.		1,800		62,353
				328,530
Netherlands – 2.6%
Koninklijke DSM NV		932		63,209
South Korea – 8.7%
Hankook Tire Co., Ltd.		1,356		66,084
Samsung Electronics Co., Ltd. Preference Shares		50		71,671
Samsung Fire & Marine Insurance Co., Ltd.		312		74,771
				212,526
Spain – 3.0%
ACS Actividades de Construccion y Servicios SA		2,182		74,435
Sweden – 6.5%
Telefonaktiebolaget LM Ericsson Class B		12,360		82,785
Volvo AB Class B		5,170		76,609
				159,394
Switzerland – 5.3%
ABB, Ltd.		2,793		65,378
Credit Suisse Group AG(a)		4,326		64,396
				129,774
Thailand – 3.3%
Bangkok Bank PCL		14,800		80,111
United Kingdom – 8.9%
CNH Industrial NV		8,100		78,316
easyJet PLC		5,413		69,447
Standard Chartered PLC(a)		7,461		71,185
				218,948
TOTAL COMMON STOCKS (Cost $2,031,556)				2,333,426
RIGHTS – 0.4%
Germany – 0.4%
Deutsche Bank AG (expiring 4/6/17)(a) (Cost $0)		3,947		9,456
SHORT-TERM INVESTMENT – 4.6%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(c)(d) (Cost $114,053)		114,053		114,053
TOTAL INVESTMENTS – 100.3% (Cost $2,145,609)				2,456,935
Liabilities in Excess of Other Assets – (0.3)%				(8,186	)
NET ASSETS – 100.0%			$	2,448,749

^(a)  Non-income producing security.

^(b)  Security purchased pursuant to Rule 144A of the Securities Act of 1933. This security, which represents 3.0% of net assets as of March 31, 2017, is considered liquid and may be resold in transactions exempt from registration, normally to qualified institutional buyers.

^(c)  The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(d)  The rate shown is the annualized seven-day yield at March 31, 2017.

See accompanying notes to schedules of investments.

145

State Street Institutional Investment Trust

State Street International Value Spotlight Fund

Schedule of Investments – (continued)

March 31, 2017 (Unaudited)

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Common Stocks
Australia	$	144,375	$	–	$	–	$	144,375
China		203,764		–		–		203,764
France		226,790		–		–		226,790
Germany		153,100		–		–		153,100
Hong Kong		72,850		–		–		72,850
Hungary		62,392		–		–		62,392
Israel		54,681		–		–		54,681
Italy		148,547		–		–		148,547
Japan		328,530		–		–		328,530
Netherlands		63,209		–		–		63,209
South Korea		212,526		–		–		212,526
Spain		74,435		–		–		74,435
Sweden		159,394		–		–		159,394
Switzerland		129,774		–		–		129,774
Thailand		80,111		–		–		80,111
United Kingdom		218,948		–		–		218,948
Rights
Germany		9,456		–		–		9,456
Short-Term Investment		114,053		–		–		114,053
Total Investments	$	2,456,935	$	–	$	–	$	2,456,935

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income
State Street Institutional U.S. Government Money Market Fund, Premier Class		41,185	$	41,185		215,134		142,266		114,053	$	114,053	$	112
TOTAL			$	41,185							$	114,053	$	112

See accompanying notes to schedules of investments.

146

State Street Institutional Investment Trust

State Street U.S. Value Spotlight Fund

Schedule of Investments

March 31, 2017 (Unaudited)

Security Description	Shares		Value
COMMON STOCKS – 92.8%
Aerospace & Defense – 5.4%
General Dynamics Corp.		141	$	26,395
United Technologies Corp.		284		31,868
				58,263
Airlines – 3.1%
Copa Holdings SA Class A		300		33,675
Banks – 8.3%
Citigroup, Inc.		608		36,371
PNC Financial Services Group, Inc.		180		21,643
Wells Fargo & Co.		576		32,060
				90,074
Capital Markets – 3.1%
Affiliated Managers Group, Inc.		201		32,952
Chemicals – 3.0%
Mosaic Co.		1,110		32,390
Communications Equipment – 5.3%
Cisco Systems, Inc.		931		31,468
F5 Networks, Inc.(a)		183		26,090
				57,558
Containers & Packaging – 3.1%
Owens-Illinois, Inc.(a)		1,624		33,097
Electric Utilities – 2.5%
Exelon Corp.		762		27,417
Electronic Equipment, Instruments & Components – 2.3%
Jabil Circuit, Inc.		877		25,363
Energy Equipment & Services – 3.4%
National Oilwell Varco, Inc.		919		36,843
Food & Staples Retailing – 2.2%
Wal-Mart Stores, Inc.		336		24,219
Health Care Providers & Services – 6.1%
Cigna Corp.		226		33,106
McKesson Corp.		219		32,469
				65,575
Household Durables – 3.1%
Tempur Sealy International, Inc.(a)		711		33,033
Insurance – 6.3%
Hartford Financial Services Group, Inc.		717		34,466
MetLife, Inc.		636		33,594
				68,060
Machinery – 3.4%
AGCO Corp.		617		37,131
Multiline Retail – 3.2%
Nordstrom, Inc.		746		34,741
Oil, Gas & Consumable Fuels – 10.5%
Chevron Corp.		269		28,882
ConocoPhillips		542		27,030
EQT Corp.		551		33,666
Occidental Petroleum Corp.		378		23,950
				113,528
Pharmaceuticals – 7.8%
Eli Lilly & Co.		361		30,364
Johnson & Johnson		205		25,533
Merck & Co., Inc.		455		28,910
				84,807
Software – 7.2%
CA, Inc.		575		18,239
Microsoft Corp.		397		26,146
Oracle Corp.		744		33,190
				77,575
Specialty Retail – 3.5%
Michaels Cos., Inc.(a)		1,703		38,130
TOTAL COMMON STOCKS (Cost $934,850)				1,004,431
SHORT-TERM INVESTMENT – 8.8%
State Street Institutional U.S. Government Money Market Fund, Premier Class 0.62%(b)(c) (Cost $94,734)		94,734		94,734
TOTAL INVESTMENTS – 101.6% (Cost $1,029,584)				1,099,165
Liabilities in Excess of Other Assets – (1.6)%				(16,787	)
NET ASSETS – 100.0%			$	1,082,378

^(a)  Non-income producing security.

^(b) The Fund invested in certain money market funds managed by SSGA Funds Management, Inc. Amounts related to these transactions during the period ended March 31, 2017 are shown in the Affiliate Table below.

^(c)  The rate shown is the annualized seven-day yield at March 31, 2017.

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Common Stocks
Aerospace & Defense	$	58,263	$	–	$	–	$	58,263
Airlines		33,675		–		–		33,675
Banks		90,074		–		–		90,074
Capital Markets		32,952		–		–		32,952

See accompanying notes to schedules of investments.

147

State Street Institutional Investment Trust

State Street U.S. Value Spotlight Fund

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Chemicals	$	32,390	$	–	$	–	$	32,390
Communications Equipment		57,558		–		–		57,558
Containers & Packaging		33,097		–		–		33,097
Electric Utilities		27,417		–		–		27,417
Electronic Equipment, Instruments & Components		25,363		–		–		25,363
Energy Equipment & Services		36,843		–		–		36,843
Food & Staples Retailing		24,219		–		–		24,219
Health Care Providers & Services		65,575		–		–		65,575
Household Durables		33,033		–		–		33,033
Insurance		68,060		–		–		68,060
Machinery		37,131		–		–		37,131
Multiline Retail		34,741		–		–		34,741
Oil, Gas & Consumable Fuels		113,528		–		–		113,528
Pharmaceuticals		84,807		–		–		84,807
Software		77,575		–		–		77,575
Specialty Retail		38,130		–		–		38,130
Short-Term Investment		94,734		–		–		94,734
Total Investments	$	1,099,165	$	–	$	–	$	1,099,165

Affiliate Table

	Number of shares held at 12/31/16		Value at 12/31/16		Shares purchased		Shares sold		Number of shares held at 3/31/17		Value at 3/31/17		Dividend income
State Street Institutional U.S. Government Money Market Fund, Premier Class		101,767	$	101,767		35,875		42,908		94,734	$	94,734	$	–
TOTAL			$	101,767							$	94,734	$	–

See accompanying notes to schedules of investments.

148

State Street Institutional Investment Trust

Notes to Schedules of Investments

March 31, 2017 (Unaudited)

Security Valuation

Each Portfolio’s or Fund’s investments are valued at fair value each day that the Portfolio’s or Fund’s listing exchange is open and, for financial reporting purposes, as of the report date should the reporting period end on a day that the Portfolio’s or Fund’s listing exchange is not open. Fair value is generally defined as the price a fund would receive to sell an asset or pay to transfer a liability in an orderly transaction between market participants at the measurement date. By its nature, a fair value price is a good faith estimate of the valuation in a current sale and may not reflect an actual market price. The investments of each Portfolio or Fund are valued pursuant to the policy and procedures developed by the Oversight Committee (the “Committee”) and approved by the Board of Trustees of the Trust (the “Board”). The Committee provides oversight of the valuation of investments for the Portfolios or Funds. The Board has responsibility for determining the fair value of investments.

State Street Equity 500 Index Fund, State Street Aggregate Bond Index Fund, State Street Global Equity ex-U.S. Index Fund, State Street Small/Mid Cap Equity Index Fund, State Street Disciplined Global Equity Fund and the State Street Hedged International Developed Equity Index Fund invest as part of a master-feeder structure and record their investments in their corresponding Portfolio, State Street Equity 500 Index II Portfolio, State Street Aggregate Bond Index Portfolio, State Street Global Equity ex-U.S. Index Portfolio, State Street Small/Mid Cap Equity Index Portfolio, State Street Disciplined Global Equity Portfolio and the State Street International Developed Equity Index Portfolio at fair value (net asset value) each business day.

Valuation techniques used to value each Portfolio’s or Fund’s investments by major category are as follows:

• Equity investments (including registered investment companies that are exchange-traded funds) traded on a recognized securities exchange for which market quotations are readily available are valued at the last sale price or official closing price, as applicable, on the primary market or exchange on which they trade. Equity investments traded on a recognized exchange for which there were no sales on that day are valued at the last published sale price or at fair value.

• Rights and warrants are valued at the last reported sale price obtained from independent pricing services or brokers on the valuation date. If no price is obtained from pricing services or brokers, valuation will be based upon the intrinsic value, pursuant to the valuation policy and procedures approved by the Board.

• Investments in registered investment companies (including money market funds) or other unitized pooled investment vehicles that are not traded on an exchange are valued at that day’s published net asset value per share or unit.

• Government and municipal fixed income securities are generally valued using quotations from independent pricing services or brokers. Certain government inflation-indexed securities may require a calculated fair valuation as the cumulative inflation is contained within the price provided by the pricing service or broker. For these securities, the inflation component of the price is “cleaned” from the pricing service or broker price utilizing the published inflation factors in order to ensure proper accrual of income.

• Debt obligations (including convertible debt securities) are valued using quotations from independent pricing services or brokers or are generally valued at the last reported evaluated bid prices.

149

State Street Institutional Investment Trust

Notes to Schedules of Investments — (continued)

March 31, 2017 (Unaudited)

• Exchange-traded futures contracts are valued at the closing settlement price on the primary market on which they are traded most extensively. Exchange-traded futures contracts traded on a recognized exchange for which there were no sales on that day are valued at the last reported sale price obtained from independent pricing services or brokers or at fair value.

• Forward foreign currency exchange contracts are valued based on that day’s prevailing forward exchange rate for the underlying currencies. The rates are obtained from independent pricing services in accordance with the valuation the policy and procedures approved by the Board.

In the event prices or quotations are not readily available or that the application of these valuation methods results in a price for an investment that is deemed to be not representative of the fair value of such investment, fair value will be determined in good faith by the Committee, in accordance with the valuation policy and procedures approved by the Board.

Various inputs are used in determining the value of the Portfolio’s or Fund’s investments.

The Portfolios or Funds value their assets and liabilities at fair value using a fair value hierarchy consisting of three broad levels that prioritize the inputs to valuation techniques giving the highest priority to readily available unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements) when market prices are not readily available or reliable. The categorization of a value determined for an investment within the hierarchy is based upon the pricing transparency of the investment and is not necessarily an indication of the risk associated with investing in it.

The three levels of the fair value hierarchy are as follows:

• Level 1 – Unadjusted quoted prices in active markets for identical asset or liability;

• Level 2 – Inputs other than quoted prices included within Level 1 that are observable for the asset or liability either directly or indirectly, including quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not considered to be active, inputs other than quoted prices that are observable for the asset or liability (such as exchange rates, financing terms, interest rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates) or other market-corroborated inputs; and

• Level 3 – Unobservable inputs for the asset or liability, including the Committee’s assumptions used in determining the fair value of investments.

The value of the Portfolio’s or Fund’s investments according to the fair value hierarchy as of March 31, 2017, is disclosed in the Portfolio’s or Fund’s Schedule of Investments.

Changes in valuation techniques may result in transfers in or out of an assigned level within the fair value hierarchy. Transfers between different levels of the fair value hierarchy are recognized at the end of the reporting period.

The Portfolios and Funds presented herein had no material transfers between levels for the period ended March 31, 2017.

150

State Street Institutional Investment Trust

Notes to Schedules of Investments — (continued)

March 31, 2017 (Unaudited)

Futures Contracts

Certain Portfolios or Funds may enter into futures contracts to meet the Portfolios’ or the Funds’ objectives. A futures contract is a standardized, exchange-traded agreement to buy or sell a financial instrument at a set price on a future date. Upon entering into a futures contract, the Portfolio or Fund is required to deposit with the broker, cash or securities in an amount equal to the minimum initial margin requirements of the clearing house. Subsequent payments are made or received by the Portfolio or Fund equal to the daily change in the contract value and are recorded as variation margin receivable or payable with a corresponding offset to unrealized gains or losses. The Portfolio or Fund recognizes a realized gain or loss when the contract is closed.

Losses may arise if the value of a futures contract decreases due to unfavorable changes in the market rates or values of the underlying instrument during the term of the contract or if the counterparty does not perform under the contract. The use of futures contracts also involves the risk that the movements in the price of the futures contracts do not correlate the movement of the assets underlying such contracts.

Forward Foreign Currency Exchange Contracts

Certain Portfolios or Funds may engage in forward foreign currency exchange contracts to acquire exposure to foreign currencies or to hedge the Portfolios’ or Funds’ investments against currency fluctuations. A forward foreign currency exchange contract is a commitment to purchase or sell a foreign currency at the settlement date at a negotiated rate. Non-deliverable forward foreign currency exchange contracts are settled with the counterparty in cash without the delivery of foreign currency. The contract is marked-to-market daily and the change in market value is recorded by the Portfolio or Fund as an unrealized gain or loss. When the contract is closed, the Portfolio or Fund recognizes a realized gain or loss equal to the difference between the value of the contract at the time it was opened and the value at the time it was closed.

Certain risks may arise upon entering into forward foreign currency exchange contracts from the potential inability of counterparties to meet the terms of their contracts and are generally limited to the amount of unrealized gains on appreciated contracts, if any. Additionally, when utilizing forward foreign currency exchange contracts to hedge, the Portfolio or the Fund gives up the opportunity to profit from favorable exchange rate movements during the term of the contract.

Other Transactions with Affiliates

The Portfolios or Funds may invest in affiliated entities, including securities issued by State Street Corporation, affiliated funds, or entities deemed to be affiliates as a result of the Portfolios or Funds owning more than five percent of the entity’s voting securities or outstanding shares. Amounts relating to these transactions during the period ended March 31, 2017, are disclosed in the Schedules of Investments.

151

State Street Institutional Investment Trust

Notes to Schedules of Investments — (continued)

March 31, 2017 (Unaudited)

Aggregate Unrealized Appreciation and Depreciation

As of March 31, 2017, gross unrealized appreciation and gross unrealized depreciation of investments based on cost for federal income tax purposes were as follows:

	Tax Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation		Net Unrealized Appreciation (Depreciation)
State Street Equity 500 Index II Portfolio	$	1,539,304,527	$	369,618,112	$	8,466,535	$	361,151,577
State Street Aggregate Bond Index Portfolio		451,574,635		1,002,595		6,025,102		(5,022,507	)
State Street Global Equity ex-U.S. Index Portfolio		880,366,736		68,101,485		20,345,238		47,756,247
State Street Small/Mid Cap Equity Index Portfolio		270,348,797		25,301,223		8,266,035		17,035,188
State Street Disciplined U.S. Equity Fund		3,143,485		460,971		12,622		448,349
State Street Disciplined International Equity Fund		3,033,102		308,852		92,975		215,877
State Street Disciplined Global Equity Portfolio		3,513,212		431,338		47,260		384,078
State Street Emerging Markets Equity Index Fund		374,207,237		72,413,315		9,046,415		63,366,900
State Street Hedged International Developed Equity Index Fund		2,265,356,890		92,565,012		–		92,565,012
State Street International Developed Equity Index Portfolio		2,206,379,599		171,530,973		83,283,259		88,247,714
State Street Target Retirement Fund		84,984,689		1,554,300		636,476		917,824
State Street Target Retirement 2015 Fund		143,774,113		2,981,889		900,170		2,081,719
State Street Target Retirement 2020 Fund		492,738,618		14,261,038		3,222,732		11,038,306
State Street Target Retirement 2025 Fund		472,980,106		17,676,661		3,196,772		14,479,889
State Street Target Retirement 2030 Fund		459,689,495		21,325,481		3,232,172		18,093,309
State Street Target Retirement 2035 Fund		329,556,455		16,691,307		2,390,172		14,301,135
State Street Target Retirement 2040 Fund		279,255,608		15,525,399		1,568,963		13,956,436
State Street Target Retirement 2045 Fund		172,030,039		9,446,514		847,074		8,599,440
State Street Target Retirement 2050 Fund		131,439,194		6,878,121		516,321		6,361,800
State Street Target Retirement 2055 Fund		42,554,594		2,091,337		180,420		1,910,917
State Street Target Retirement 2060 Fund		4,802,463		256,517		31,977		224,540
State Street Asia Pacific Value Spotlight Fund		2,020,738		116,164		67,649		48,515
State Street European Value Spotlight Fund		1,049,677		106,399		12,984		93,415
State Street Global Value Spotlight Fund		2,070,774		214,512		23,094		191,418
State Street International Value Spotlight Fund		2,145,941		357,502		46,508		310,994
State Street U.S. Value Spotlight Fund		1,029,475		95,059		25,369		69,690

Subsequent Events

Management has evaluated the impact of all subsequent events on the Funds through the date on which the N-Q filings were available to be issued and has determined that there were no subsequent events requiring adjustment or disclosure in the N-Q filings.

152

Quarterly Report

31 March 2017

State Street Institutional Investment Trust

State Street Institutional Liquid Reserves Fund

State Street Institutional U.S. Government Money Market Fund

State Street Institutional Treasury Money Market Fund

State Street Institutional Treasury Plus Money Market Fund

The information contained in this report is intended for the general information of shareholders of the Fund. This report is not authorized for distribution to prospective investors unless preceded or accompanied by a current Fund prospectus which contains important information concerning the Fund and the Trust. You may obtain a current prospectus and SAI from the Distributor by calling 1-877-521-4083 or visiting www.ssga.com/cash. Please read the prospectus carefully before investing in the Fund.

State Street Institutional Investment Trust

Quarterly Report

March 31, 2017 (Unaudited)

Table of Contents

Schedules of Investments
State Street Institutional Liquid Reserves Fund	1
State Street Institutional U.S. Government Money Market Fund	6
State Street Institutional Treasury Money Market Fund	16
State Street Institutional Treasury Plus Money Market Fund	18
Notes to Schedule of Investments	20

The information contained in this report is intended for the general information of shareholders of the Fund. This report is not authorized for distribution to prospective investors unless preceded or accompanied by a current Fund prospectus which contains important information concerning the Fund and the Trust. You may obtain a current prospectus and SAI from the Distributor by calling 1-877-521-4083 or visiting www.ssga.com/cash. Please read the prospectus carefully before investing in the Fund.

State Street Institutional Liquid Reserves Fund is a feeder fund that invests substantially all of its investable assets in a master fund, the State Street Money Market Portfolio. The schedule of investments for the State Street Money Market Portfolio follows.

State Street Master Funds

State Street Money Market Portfolio

Schedule of Investments

March 31, 2017 (Unaudited)

Name of Issuer and Title of Issue	Interest Rate			Next Rate Reset Date		Maturity Date		Principal Amount		Value
ASSET BACKED COMMERCIAL PAPER – 16.1%
Alpine Securitization Ltd.(a)		1.100	%		06/06/2017		06/06/2017	$	34,700,000	$	34,630,022
Alpine Securitization Ltd.(a)		1.170	%		04/19/2017		04/19/2017		115,000,000		114,932,725
Antalis SA(a)		0.950	%		04/10/2017		04/10/2017		68,000,000		67,983,850
Antalis SA(a)		1.200	%		06/06/2017		06/06/2017		38,050,000		37,966,290
Bennington Stark Capital Co. LLC(a)		0.900	%		04/03/2017		04/03/2017		122,357,000		122,350,961
Collateralized Commercial Paper Co. LLC(a)		1.120	%		06/08/2017		06/08/2017		75,000,000		74,841,333
Collateralized Commercial Paper Co. LLC(a)		1.170	%		05/19/2017		05/19/2017		80,000,000		79,875,200
Collateralized Commercial Paper Co. LLC(b)		1.293	%		04/26/2017		10/26/2017		100,000,000		100,000,000
Collateralized Commercial Paper Co. LLC(b)		1.300	%		04/06/2017		07/06/2017		100,000,000		100,000,000
Gotham Funding Corp.(a)		0.940	%		04/06/2017		04/06/2017		120,302,000		120,286,294
Kells Funding LLC(a)		0.980	%		04/06/2017		04/06/2017		44,000,000		43,994,011
Kells Funding LLC(a)		1.010	%		06/14/2017		06/14/2017		75,000,000		74,844,292
Kells Funding LLC(a)		1.110	%		06/13/2017		06/13/2017		100,000,000		99,774,917
Kells Funding LLC(a)		1.110	%		06/14/2017		06/14/2017		100,000,000		99,771,833
LMA SA(a)		1.010	%		05/24/2017		05/24/2017		53,900,000		53,819,854
LMA SA(a)		1.200	%		06/14/2017		06/14/2017		75,000,000		74,815,000
Nieuw Amsterdam Receivables Corp.(a)		1.200	%		06/12/2017		06/12/2017		100,000,000		99,760,000
Starbird Funding Corp.(a)		1.200	%		06/13/2017		06/13/2017		50,000,000		49,878,333
TOTAL ASSET BACKED COMMERCIAL PAPER											1,449,524,915
CERTIFICATES OF DEPOSIT – 32.4%
Bank of Montreal(a)		1.000	%		04/03/2017		04/03/2017		75,000,000		75,000,525
Bank of Montreal(b)		1.144	%		05/02/2017		06/01/2017		100,000,000		100,052,188
Bank of Montreal(b)		1.282	%		04/18/2017		05/15/2017		50,000,000		50,020,925
Bank of Tokyo-Mitsubishi UFJ Ltd.(a)		1.100	%		05/09/2017		05/09/2017		115,000,000		115,000,000
Bank of Tokyo-Mitsubishi UFJ Ltd.(a)		1.140	%		06/07/2017		06/07/2017		85,000,000		85,000,000
Canadian Imperial Bank of Commerce(b)		1.079	%		05/02/2017		12/01/2017		50,000,000		50,000,000
Citibank NA(a)		1.000	%		05/16/2017		05/16/2017		100,000,000		100,000,000
Citibank NA(a)		1.150	%		06/16/2017		06/16/2017		50,000,000		50,000,000
DnB Bank ASA(a)		0.860	%		04/04/2017		04/04/2017		125,000,000		125,000,000
ING Bank NV(a)		1.050	%		04/03/2017		04/03/2017		115,000,000		115,000,000
ING Bank NV(a)		1.210	%		07/06/2017		07/06/2017		55,000,000		55,000,000
KBC Bank NV(a)		0.880	%		04/05/2017		04/05/2017		154,000,000		154,000,000
Lloyds Bank PLC(b)		1.428	%		04/20/2017		07/20/2017		75,000,000		75,000,000
Norinchukin Bank(a)		0.800	%		04/10/2017		04/10/2017		93,000,000		93,000,000
Norinchukin Bank(a)		1.030	%		04/27/2017		04/27/2017		125,000,000		125,000,000
Royal Bank of Canada(b)		1.184	%		04/07/2017		03/07/2018		100,000,000		100,000,000

See accompanying Notes to Schedule of Investments.

1

State Street Master Funds

State Street Money Market Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Name of Issuer and Title of Issue	Interest Rate			Next Rate Reset Date		Maturity Date		Principal Amount		Value
CERTIFICATES OF DEPOSIT – (continued)
Royal Bank of Canada(b)		1.270	%		05/04/2017		08/04/2017	$	100,000,000	$	100,000,000
Royal Bank of Canada(b)		1.444	%		04/24/2017		10/24/2017		48,000,000		48,000,000
Skandinaviska Enskilda Banken AB(b)		1.411	%		04/12/2017		05/12/2017		86,000,000		86,049,786
Societe Generale(a)		1.120	%		05/19/2017		05/19/2017		75,000,000		75,000,000
Sumitomo Mitsui Banking Corp.(a)		1.090	%		06/01/2017		06/01/2017		71,650,000		71,651,190
Swedbank AB(a)		0.880	%		04/03/2017		04/03/2017		100,000,000		100,000,000
Swedbank AB(a)		0.880	%		04/05/2017		04/05/2017		100,000,000		100,000,000
Swedbank AB(a)		0.880	%		04/06/2017		04/06/2017		100,000,000		100,000,000
Toronto-Dominion Bank(a)		0.930	%		04/05/2017		04/05/2017		125,000,000		125,000,000
Toronto-Dominion Bank(a)		1.100	%		04/18/2017		04/18/2017		110,000,000		110,000,000
Toronto-Dominion Bank(a)		1.100	%		04/19/2017		04/19/2017		90,000,000		90,000,000
Toronto-Dominion Bank(b)		1.174	%		05/03/2017		03/05/2018		50,000,000		50,000,000
UBS AG(b)		1.284	%		04/07/2017		05/08/2017		65,000,000		65,029,225
Wells Fargo Bank NA(b)		1.270	%		05/04/2017		05/08/2017		75,000,000		75,033,818
Wells Fargo Bank NA(b)		1.290	%		04/06/2017		08/07/2017		150,000,000		150,000,000
Wells Fargo Bank NA(b)		1.318	%		04/10/2017		08/10/2017		104,000,000		104,000,000
TOTAL CERTIFICATES OF DEPOSIT											2,916,837,657
FINANCIAL COMPANY COMMERCIAL PAPER – 24.7%
Australia & New Zealand Banking Group Ltd.(a)		0.900	%		04/26/2017		04/26/2017		75,000,000		74,953,125
Australia & New Zealand Banking Group Ltd.(a)		0.980	%		04/03/2017		04/03/2017		54,000,000		53,997,060
Bank Nederlandse Gemeenten NV(a)		0.950	%		04/19/2017		04/19/2017		150,000,000		149,928,750
Bank Nederlandse Gemeenten NV(a)		0.960	%		04/05/2017		04/05/2017		75,000,000		74,992,000
Bank of Nova Scotia(b)		1.114	%		04/03/2017		12/01/2017		75,000,000		75,000,000
Bank of Nova Scotia(b)		1.252	%		05/22/2017		02/21/2018		49,000,000		49,000,000
Bank of Nova Scotia(b)		1.254	%		05/23/2017		02/23/2018		32,000,000		32,000,000
BNP Paribas(a)		1.080	%		04/11/2017		04/11/2017		125,000,000		124,962,500
Caisse des Depots et Consignations(a)		1.100	%		07/03/2017		07/03/2017		100,000,000		99,715,833
DBS Bank Ltd.(a)		1.040	%		04/03/2017		04/03/2017		75,000,000		74,995,667
DBS Bank Ltd.(a)		1.050	%		04/24/2017		04/24/2017		115,000,000		114,922,854
DBS Bank Ltd.(a)		1.130	%		06/21/2017		06/21/2017		65,000,000		64,834,737
DnB Bank ASA(a)		1.060	%		05/30/2017		05/30/2017		115,000,000		114,800,219
Erste Abwicklungsanstalt(a)		1.120	%		05/31/2017		05/31/2017		100,000,000		99,813,333
Erste Abwicklungsanstalt(a)		1.130	%		05/15/2017		05/15/2017		100,000,000		99,861,889
Erste Abwicklungsanstalt(b)		1.151	%		04/03/2017		04/03/2017		125,000,000		125,002,594
Mizuho Bank Ltd.(a)		1.050	%		05/22/2017		05/22/2017		100,000,000		99,851,250
National Australia Bank Ltd.(b)		1.347	%		04/24/2017		10/23/2017		75,000,000		75,000,000
Nederlandse Waterschapsbank NV(a)		0.770	%		04/03/2017		04/03/2017		115,000,000		114,995,081
NRW.BANK(a)		1.000	%		04/07/2017		04/07/2017		100,000,000		99,983,333

See accompanying Notes to Schedule of Investments.

2

State Street Master Funds

State Street Money Market Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Name of Issuer and Title of Issue	Interest Rate			Next Rate Reset Date		Maturity Date		Principal Amount		Value
FINANCIAL COMPANY COMMERCIAL PAPER – (continued)
NRW.BANK(a)		1.030	%		04/04/2017		04/04/2017	$	40,000,000	$	39,996,567
NRW.BANK(a)		1.030	%		04/05/2017		04/05/2017		45,000,000		44,994,850
Sumitomo Mitsui Banking Corp.(a)		1.100	%		04/20/2017		04/20/2017		85,000,000		84,950,653
Sumitomo Mitsui Banking Corp.(a)		1.100	%		04/24/2017		04/24/2017		75,000,000		74,947,292
Sumitomo Mitsui Banking Corp.(a)		1.100	%		05/17/2017		05/17/2017		80,000,000		79,887,556
Swedbank AB(a)		1.020	%		06/05/2017		06/05/2017		40,000,000		39,926,333
Westpac Banking Corp.(b)		1.338	%		04/20/2017		08/18/2017		40,000,000		40,000,000
TOTAL FINANCIAL COMPANY COMMERCIAL PAPER											2,223,313,476
OTHER COMMERCIAL PAPER – 1.4%
General Electric Co.(a)		0.820	%		04/05/2017		04/05/2017		75,000,000		74,993,167
General Electric Co.(a)		0.820	%		04/06/2017		04/06/2017		50,000,000		49,994,305
TOTAL OTHER COMMERCIAL PAPER											124,987,472
OTHER NOTES – 22.2%
Bank of America NA(b)		1.169	%		04/03/2017		06/02/2017		50,000,000		49,999,208
Bank of America NA(b)		1.261	%		04/05/2017		07/05/2017		75,000,000		75,000,000
Bank of America NA(b)		1.373	%		04/18/2017		05/17/2017		35,000,000		34,999,586
Bank of America NA(b)		1.398	%		04/03/2017		06/01/2017		74,000,000		73,998,851
BNP Paribas(a)		0.810	%		04/03/2017		04/03/2017		200,000,000		200,000,000
Canadian Imperial Bank of Commerce(a)		0.820	%		04/03/2017		04/03/2017		37,000,000		37,000,000
Credit Agricole Corporate & Investment Bank(a)		0.800	%		04/03/2017		04/03/2017		200,000,000		200,000,000
Lloyds Bank PLC(a)		0.810	%		04/03/2017		04/03/2017		325,000,000		325,000,000
National Bank of Canada(a)		0.860	%		04/05/2017		04/05/2017		150,000,000		150,000,000
Natixis North America LLC(a)		0.820	%		04/03/2017		04/03/2017		75,000,000		75,000,000
Nordea Bank Finland PLC(a)		0.810	%		04/03/2017		04/03/2017		400,000,000		400,000,000
Skandinaviska Enskilda Banken AB(a)		0.810	%		04/03/2017		04/03/2017		325,000,000		325,000,000
Toyota Motor Credit Corp., 3 Month USD LIBOR + 0.25%(b)		1.350	%		06/05/2017		12/05/2017		50,000,000		50,053,290
TOTAL OTHER NOTES											1,996,050,935
GOVERNMENT AGENCY REPURCHASE AGREEMENTS – 0.6%
Agreement with Bank of America and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by a Government National Mortgage Association, 3.500% due 02/20/2047, valued at $22,440,001); expected proceeds $22,001,522		0.830	%		04/03/2017		04/03/2017		22,000,000		22,000,000

See accompanying Notes to Schedule of Investments.

3

State Street Master Funds

State Street Money Market Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Name of Issuer and Title of Issue	Interest Rate			Next Rate Reset Date		Maturity Date		Principal Amount		Value
GOVERNMENT AGENCY REPURCHASE AGREEMENTS – (continued)
Agreement with JP Morgan Securities, Inc. and JP Morgan Chase & Co. (Tri-Party), dated 03/31/2017 (collateralized by Federal National Mortgage Associations, 2.500% – 4.000% due 01/01/2032 – 12/01/2043, valued at $27,541,647); expected proceeds $27,001,845		0.820	%		04/03/2017		04/03/2017	$	27,000,000	$	27,000,000
TOTAL GOVERNMENT AGENCY REPURCHASE AGREEMENTS											49,000,000
OTHER REPURCHASE AGREEMENTS – 0.6%
Agreement with Bank of Nova Scotia and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by various Corporate Bonds, 1.050% – 9.400% due 05/01/2017 – 08/31/2064, valued at $53,509,009); expected proceeds $50,004,417		1.060	%		04/03/2017		04/03/2017		50,000,000		50,000,000
TREASURY REPURCHASE AGREEMENTS – 1.7%
Agreement with Citigroup Global Markets, Inc. and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by a U.S. Treasury Inflation Index Note, 0.625% due 01/15/2026, valued at $51,000,010); expected proceeds $50,004,417		1.060	%		04/03/2017		04/03/2017		50,000,000		50,000,000
Agreement with Citigroup Global Markets, Inc. and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by a U.S. Treasury Note, 1.750% due 05/15/2022, valued at $26,520,027); expected proceeds $26,001,755		0.810	%		04/03/2017		04/03/2017		26,000,000		26,000,000
Agreement with Credit Agricole Corporate and Investment Bank and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by a U.S. Treasury Note, 0.875% due 05/15/2019, valued at $56,100,075); expected proceeds $55,003,667		0.800	%		04/03/2017		04/03/2017		55,000,000		55,000,000
Agreement with TD Securities (USA) LLC and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by a U.S. Treasury Inflation Index Note, 1.125% due 01/15/2021, valued at $25,501,791); expected proceeds $25,001,708		0.820	%		04/03/2017		04/03/2017		25,000,000		25,000,000
TOTAL TREASURY REPURCHASE AGREEMENTS											156,000,000
TOTAL INVESTMENTS – 99.7% (Cost $8,965,547,719)(c)											8,965,714,455
Other Assets in Excess of Liabilities – 0.3%											28,499,561
NET ASSETS – 100.0%										$	8,994,214,016

^(a)  Rate represents annualized yield at date of purchase.

^(b)  Variable Rate Security - Interest rate shown is rate in effect at March 31, 2017.

^(c)  Also represents the cost for federal tax purposes.

See accompanying Notes to Schedule of Investments.

4

State Street Master Funds

State Street Money Market Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

The following table summarizes the value of the Fund’s investments according to the fair value hierarchy as of March 31, 2017.

Description	Level 1 – Quoted Prices		Level 2 – Other Significant Observable Inputs		Level 3 – Significant Unobservable Inputs		Total
Assets:
Investments:
Asset Backed Commercial Paper	$	–	$	1,449,524,915	$	–	$	1,449,524,915
Certificates of Deposit		–		2,916,837,657		–		2,916,837,657
Financial Company Commercial Paper		–		2,223,313,476		–		2,223,313,476
Other Commercial Paper		–		124,987,472		–		124,987,472
Other Notes		–		1,996,050,935		–		1,996,050,935
Government Agency Repurchase Agreements		–		49,000,000		–		49,000,000
Other Repurchase Agreement		–		50,000,000		–		50,000,000
Treasury Repurchase Agreements		–		156,000,000		–		156,000,000
Total Investments	$	–	$	8,965,714,455	$	–	$	8,965,714,455

See accompanying Notes to Schedule of Investments.

5

State Street Institutional U.S. Government Money Market Fund is a feeder fund that invests substantially all of its investable assets in a master fund, the State Street U.S. Government Money Market Portfolio. The schedule of investments for the State Street U.S. Government Money Market Portfolio follows.

State Street Master Funds

State Street U.S. Government Money Market Portfolio

Schedule of Investments

March 31, 2017 (Unaudited)

Name of Issuer and Title of Issue	Interest Rate			Next Rate Reset Date		Maturity Date		Principal Amount		Value
GOVERNMENT AGENCY DEBT – 45.6%
Federal Farm Credit Bank, 1 Month USD LIBOR – 0.15%(a)		0.644	%		04/02/2017		04/02/2018	$	200,000,000	$	200,000,000
Federal Farm Credit Bank, 1 Month USD LIBOR – 0.12%(a)		0.691	%		04/03/2017		10/03/2017		98,200,000		98,194,959
Federal Farm Credit Bank, 1 Month USD LIBOR + 0.07%(a)		0.899	%		04/07/2017		11/07/2017		150,000,000		149,996,355
Federal Farm Credit Bank, 1 Month USD LIBOR – 0.05%(a)		0.932	%		04/30/2017		08/30/2017		124,900,000		124,894,768
Federal Farm Credit Bank, 1 Month USD LIBOR – 0.04%(a)		0.942	%		04/30/2017		11/30/2017		150,000,000		149,987,393
Federal Farm Credit Bank, 1 Month USD LIBOR – 0.04%(a)		0.947	%		04/30/2017		10/30/2017		125,000,000		124,997,797
Federal Farm Credit Bank, 1 Month USD LIBOR – 0.18%(a)		0.609	%		04/02/2017		03/02/2018		115,000,000		115,000,000
Federal Farm Credit Bank, 1 Month USD LIBOR + 0.01%(a)		0.917	%		04/15/2017		05/15/2017		158,750,000		158,749,244
Federal Farm Credit Bank, 1 Month USD LIBOR + 0.13%(a)		0.960	%		04/04/2017		12/04/2017		125,000,000		125,120,673
Federal Farm Credit Bank, 1 Month USD LIBOR + 0.04%(a)		1.022	%		04/27/2017		04/27/2017		119,600,000		119,599,397
Federal Home Loan Bank(b)		0.555	%		04/24/2017		04/24/2017		180,995,000		181,051,966
Federal Home Loan Bank(b)		0.557	%		04/27/2017		04/27/2017		149,000,000		149,054,948
Federal Home Loan Bank, 3 Month USD LIBOR – 0.29%(a)		0.708	%		04/03/2017		10/03/2017		73,900,000		73,900,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.10%(a)		0.930	%		04/20/2017		04/20/2017		146,800,000		146,800,000
Federal Home Loan Bank, 1 Month USD LIBOR + 0.01%(a)		0.983	%		04/18/2017		05/18/2017		148,600,000		148,600,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.05%(a)		0.993	%		05/08/2017		08/08/2017		250,000,000		250,000,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.09%(a)		1.019	%		06/08/2017		09/08/2017		275,000,000		275,000,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.11%(a)		1.042	%		06/20/2017		06/20/2017		28,200,000		28,199,653
Federal Home Loan Bank, 3 Month USD LIBOR – 0.10%(a)		1.052	%		06/29/2017		06/29/2017		368,350,000		368,350,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.46%(a)		0.555	%		04/11/2017		04/11/2017		400,000,000		400,000,000

See accompanying Notes to Schedule of Investments.

6

State Street Master Funds

State Street U.S. Government Money Market Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Name of Issuer and Title of Issue	Interest Rate			Next Rate Reset Date		Maturity Date		Principal Amount		Value
GOVERNMENT AGENCY DEBT – (continued)
Federal Home Loan Bank, 1 Month USD LIBOR – 0.08%(a)		0.811	%		04/14/2017		12/14/2017	$	250,000,000	$	250,000,000
Federal Home Loan Bank, 1 Month USD LIBOR + 0.02%(a)		0.850	%		04/04/2017		05/04/2017		220,600,000		220,600,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.28%(a)		0.851	%		06/15/2017		12/15/2017		200,000,000		200,000,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.08%(a)		0.954	%		05/01/2017		11/01/2017		50,000,000		50,000,000
Federal Home Loan Bank, 1 Month USD LIBOR + 0.01%(a)		0.987	%		04/23/2017		05/23/2017		80,800,000		80,800,000
Federal Home Loan Bank, 1 Month USD LIBOR + 0.01%(a)		0.993	%		05/01/2017		11/28/2017		250,000,000		249,991,617
Federal Home Loan Bank, 3 Month USD LIBOR – 0.05%(a)		1.076	%		06/14/2017		06/14/2017		300,000,000		300,000,000
Federal Home Loan Bank, 1 Month USD LIBOR – 0.11%(a)		0.724	%		04/07/2017		07/07/2017		403,600,000		403,600,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.42%(a)		0.623	%		04/24/2017		07/24/2017		156,000,000		156,000,000
Federal Home Loan Bank, 1 Month USD LIBOR – 0.01%(a)		0.779	%		04/02/2017		10/02/2017		275,000,000		275,000,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.18%(a)		0.859	%		05/15/2017		11/15/2017		250,000,000		250,000,000
Federal Home Loan Bank, 1 Month USD LIBOR – 0.08%(a)		0.801	%		04/13/2017		12/13/2017		148,300,000		148,300,000
Federal Home Loan Bank, 1 Month USD LIBOR – 0.02%(a)		0.968	%		04/28/2017		08/28/2017		188,500,000		188,500,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.18%(a)		0.854	%		05/13/2017		11/13/2017		125,000,000		125,000,000
Federal Home Loan Bank, 1 Month USD LIBOR – 0.02%(a)		0.819	%		04/07/2017		09/07/2017		181,000,000		181,000,000
Federal Home Loan Bank, 1 Month USD LIBOR – 0.08%(a)		0.832	%		04/15/2017		12/15/2017		250,000,000		250,000,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.05%(a)		0.963	%		04/10/2017		07/10/2017		175,000,000		174,998,816
Federal Home Loan Bank, 1 Month USD LIBOR + 0.01%(a)		0.840	%		04/06/2017		04/06/2018		90,000,000		89,999,850
Federal Home Loan Bank(b)		0.489	%		04/07/2017		04/07/2017		100,000,000		99,991,850
Federal Home Loan Bank(b)		0.500	%		04/12/2017		04/12/2017		246,600,000		246,560,811
Federal Home Loan Bank, 3 Month USD LIBOR – 0.40%(a)		0.623	%		04/17/2017		07/17/2017		135,700,000		135,700,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.35%(a)		0.680	%		04/22/2017		01/22/2018		171,400,000		171,400,000

See accompanying Notes to Schedule of Investments.

7

State Street Master Funds

State Street U.S. Government Money Market Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Name of Issuer and Title of Issue	Interest Rate			Next Rate Reset Date		Maturity Date		Principal Amount		Value
GOVERNMENT AGENCY DEBT – (continued)
Federal Home Loan Bank, 1 Month USD LIBOR – 0.13%(a)		0.724	%		04/09/2017		01/09/2018	$	185,700,000	$	185,700,000
Federal Home Loan Bank(b)		0.785	%		06/21/2017		06/21/2017		509,000,000		508,100,000
Federal Home Loan Bank(b)		0.785	%		06/23/2017		06/23/2017		350,000,000		349,366,549
Federal Home Loan Bank(b)		0.788	%		06/16/2017		06/16/2017		327,250,000		326,705,601
Federal Home Loan Bank(b)		0.789	%		06/09/2017		06/09/2017		299,000,000		298,547,837
Federal Home Loan Bank(b)		0.789	%		06/28/2017		06/28/2017		483,000,000		482,068,454
Federal Home Loan Bank(b)		0.790	%		05/31/2017		05/31/2017		138,999,000		138,816,769
Federal Home Loan Bank(b)		0.800	%		06/30/2017		06/30/2017		119,500,000		119,261,000
Federal Home Loan Bank(b)		0.800	%		07/05/2017		07/05/2017		100,000,000		99,788,889
Federal Home Loan Bank, 1 Month USD LIBOR – 0.15%(a)		0.837	%		04/25/2017		01/25/2018		211,000,000		211,000,000
Federal Home Loan Bank, 1 Month USD LIBOR – 0.18%(a)		0.803	%		04/19/2017		04/19/2017		68,700,000		68,699,828
Federal Home Loan Bank, 1 Month USD LIBOR – 0.16%(a)		0.818	%		04/18/2017		10/18/2017		234,400,000		234,400,000
Federal Home Loan Bank, 1 Month USD LIBOR – 0.15%(a)		0.833	%		04/18/2017		01/18/2018		105,500,000		105,500,000
Federal Home Loan Bank, 1 Month USD LIBOR – 0.03%(a)		0.913	%		04/17/2017		08/17/2017		221,800,000		221,800,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.39%(a)		0.647	%		04/26/2017		01/26/2018		413,000,000		413,000,000
Federal Home Loan Bank, 1 Month USD LIBOR – 0.09%(a)		0.791	%		04/11/2017		08/11/2017		67,300,000		67,300,000
Federal Home Loan Bank, 1 Month USD LIBOR – 0.13%(a)		0.700	%		04/05/2017		01/05/2018		701,200,000		701,200,000
Federal Home Loan Bank, 1 Month USD LIBOR – 0.03%(a)		0.896	%		04/16/2017		08/16/2017		95,000,000		95,000,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.46%(a)		0.565	%		04/19/2017		04/19/2017		68,700,000		68,700,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.32%(a)		0.828	%		04/03/2017		04/03/2018		243,000,000		243,000,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.32%(a)		0.831	%		06/28/2017		03/28/2018		81,000,000		81,000,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.43%(a)		0.612	%		04/27/2017		07/27/2017		102,000,000		101,963,972
Federal Home Loan Bank, 3 Month USD LIBOR – 0.41%(a)		0.612	%		04/13/2017		07/13/2017		387,000,000		387,000,000
Federal Home Loan Bank, 1 Month USD LIBOR – 0.16%(a)		0.675	%		04/06/2017		10/06/2017		210,400,000		210,400,000
Federal Home Loan Bank, 1 Month USD LIBOR – 0.17%(a)		0.808	%		04/18/2017		04/18/2017		170,000,000		170,000,000

See accompanying Notes to Schedule of Investments.

8

State Street Master Funds

State Street U.S. Government Money Market Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Name of Issuer and Title of Issue	Interest Rate			Next Rate Reset Date		Maturity Date		Principal Amount		Value
GOVERNMENT AGENCY DEBT – (continued)
Federal Home Loan Bank, 3 Month USD LIBOR – 0.28%(a)		0.840	%		06/13/2017		12/13/2017	$	94,900,000	$	94,900,000
Federal Home Loan Bank, 1 Month USD LIBOR – 0.03%(a)		0.898	%		04/16/2017		08/16/2017		158,500,000		158,500,000
Federal Home Loan Bank, 1 Month USD LIBOR – 0.03%(a)		0.910	%		04/17/2017		08/17/2017		95,000,000		95,000,000
Federal Home Loan Bank, 3 Month USD LIBOR – 0.40%(a)		0.618	%		04/12/2017		07/12/2017		339,300,000		339,300,000
Federal Home Loan Mortgage Corp.(b)		0.500	%		05/15/2017		05/15/2017		321,900,000		321,703,283
Federal Home Loan Mortgage Corp.(b)		0.520	%		04/17/2017		04/17/2017		130,000,000		129,969,956
Federal Home Loan Mortgage Corp.(b)		0.520	%		04/21/2017		04/21/2017		39,300,000		39,288,647
Federal Home Loan Mortgage Corp., 3 Month USD LIBOR – 0.34%(a)		0.675	%		04/11/2017		01/11/2018		376,500,000		376,500,000
Federal Home Loan Mortgage Corp.(b)		0.770	%		07/05/2017		07/05/2017		358,073,000		357,345,416
Federal Home Loan Mortgage Corp.(b)		0.780	%		06/26/2017		06/26/2017		265,800,000		265,304,726
Federal Home Loan Mortgage Corp.(b)		0.830	%		08/04/2017		08/04/2017		336,800,000		335,829,361
Federal Home Loan Mortgage Corp., 1 Month USD LIBOR + 0.01%(a)		0.983	%		04/20/2017		04/20/2017		125,000,000		124,999,005
Federal Home Loan Mortgage Corp., 3 Month USD LIBOR – 0.08%(a)		1.072	%		06/21/2017		12/21/2017		75,000,000		75,000,000
Federal Home Loan Mortgage Corp., 1 Month USD LIBOR + 0.04%(a)		0.921	%		04/13/2017		11/13/2017		250,000,000		250,000,000
Federal Home Loan Mortgage Corp., 1 Month USD LIBOR – 0.21%(a)		0.733	%		04/17/2017		04/17/2017		333,400,000		333,400,000
Federal Home Loan Mortgage Corp.(b)		0.500	%		04/25/2017		04/25/2017		369,500,000		369,376,833
Federal Home Loan Mortgage Corp.(b)		0.520	%		05/09/2017		05/09/2017		369,400,000		369,197,240
Federal Home Loan Mortgage Corp.(b)		0.550	%		05/18/2017		05/18/2017		184,500,000		184,367,519
Federal Home Loan Mortgage Corp.(b)		0.770	%		06/15/2017		06/15/2017		210,773,000		210,434,885
Federal Home Loan Mortgage Corp.(b)		0.770	%		06/20/2017		06/20/2017		258,800,000		258,357,164
Federal Home Loan Mortgage Corp., 3 Month USD LIBOR – 0.35%(a)		0.806	%		06/22/2017		12/22/2017		395,000,000		395,000,000
Federal National Mortgage Assoc.(b)		0.550	%		04/27/2017		04/27/2017		229,000,000		229,094,717
Federal National Mortgage Assoc., 1 Month USD LIBOR + 0.01%(a)		0.840	%		04/05/2017		10/05/2017		75,000,000		74,985,005
Federal National Mortgage Assoc., 1 Month USD LIBOR + 0.01%(a)		0.938	%		04/16/2017		08/16/2017		300,000,000		299,988,652
Federal National Mortgage Assoc., 3 Month USD LIBOR – 0.03%(a)		0.985	%		04/11/2017		01/11/2018		125,000,000		125,000,000
Federal National Mortgage Assoc., 3 Month USD LIBOR – 0.05%(a)		1.102	%		06/21/2017		03/21/2018		250,000,000		250,412,793
Federal National Mortgage Assoc., 1 Month USD LIBOR + 0.01%(a)		0.857	%		04/08/2017		09/08/2017		220,000,000		219,970,918

See accompanying Notes to Schedule of Investments.

9

State Street Master Funds

State Street U.S. Government Money Market Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Name of Issuer and Title of Issue	Interest Rate			Next Rate Reset Date		Maturity Date		Principal Amount		Value
GOVERNMENT AGENCY DEBT – (continued)
Federal National Mortgage Assoc.(b)		0.510	%		04/03/2017		04/03/2017	$	398,000,000	$	397,988,723
Federal National Mortgage Assoc.(b)		0.510	%		04/17/2017		04/17/2017		460,000,000		459,895,733
Federal National Mortgage Assoc.(b)		0.512	%		04/26/2017		04/26/2017		272,367,000		272,270,158
Federal National Mortgage Assoc.(b)		0.519	%		04/05/2017		04/05/2017		150,000,000		149,991,350
Federal National Mortgage Assoc.(b)		0.530	%		04/19/2017		04/19/2017		173,750,000		173,703,956
Federal National Mortgage Assoc.(b)		0.770	%		05/10/2017		05/10/2017		144,000,000		143,879,880
Federal National Mortgage Assoc.(b)		0.770	%		06/21/2017		06/21/2017		118,373,000		118,167,919
Federal National Mortgage Assoc.(b)		0.775	%		06/14/2017		06/14/2017		111,000,000		110,823,171
Federal National Mortgage Assoc.(b)		0.780	%		06/07/2017		06/07/2017		69,346,000		69,245,333
Federal National Mortgage Assoc.(b)		0.530	%		05/01/2017		05/01/2017		297,500,000		297,368,604
TOTAL GOVERNMENT AGENCY DEBT											21,999,819,943
TREASURY DEBT – 17.7%
U.S. Treasury Bill(b)		0.470	%		04/20/2017		04/20/2017		899,000,000		898,709,553
U.S. Treasury Bill(b)		0.483	%		04/27/2017		04/27/2017		1,050,000,000		1,049,564,428
U.S. Treasury Bill(b)		0.490	%		04/06/2017		04/06/2017		702,000,000		701,949,965
U.S. Treasury Bill(b)		0.495	%		04/13/2017		04/13/2017		891,000,000		890,806,402
U.S. Treasury Bill(b)		0.518	%		05/04/2017		05/04/2017		400,000,000		399,810,935
U.S. Treasury Bill(b)		0.615	%		05/25/2017		05/25/2017		100,000,000		99,908,050
U.S. Treasury Bill(b)		0.615	%		06/08/2017		06/08/2017		248,500,000		248,211,326
U.S. Treasury Bill(b)		0.620	%		06/01/2017		06/01/2017		305,000,000		304,683,308
U.S. Treasury Bill(b)		0.625	%		05/18/2017		05/18/2017		300,000,000		299,756,612
U.S. Treasury Bill(b)		0.778	%		06/29/2017		06/29/2017		500,000,000		499,036,575
U.S. Treasury Bill(b)		0.793	%		06/15/2017		06/15/2017		746,000,000		744,783,453
U.S. Treasury Bill(b)		0.910	%		09/14/2017		09/14/2017		303,250,000		301,979,018
U.S. Treasury Note(b)		0.820	%		07/31/2017		07/31/2017		111,000,000		111,574,448
U.S. Treasury Note(b)		0.825	%		07/31/2017		07/31/2017		110,000,000		109,926,619
U.S. Treasury Note, 3 Month USD MMY + 0.07%(a)		0.856	%		04/01/2017		04/30/2017		176,500,000		176,500,049
U.S. Treasury Note, 3 Month USD MMY + 0.08%(a)		0.859	%		04/01/2017		07/31/2017		229,000,000		228,978,288
U.S. Treasury Note, 3 Month USD MMY + 0.17%(a)		0.950	%		04/01/2017		10/31/2017		150,000,000		149,911,744
U.S. Treasury Note, 3 Month USD MMY + 0.17%(a)		0.956	%		04/01/2017		07/31/2018		678,566,000		679,298,457
U.S. Treasury Note, 3 Month USD MMY + 0.19%(a)		0.972	%		04/04/2017		04/30/2018		650,500,000		651,286,208
TOTAL TREASURY DEBT											8,546,675,438

See accompanying Notes to Schedule of Investments.

10

State Street Master Funds

State Street U.S. Government Money Market Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Name of Issuer and Title of Issue	Interest Rate			Next Rate Reset Date		Maturity Date		Principal Amount		Value
GOVERNMENT AGENCY REPURCHASE AGREEMENTS – 9.5%
Agreement with Citigroup Global Markets, Inc. and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by Federal Home Loan Mortgage Corporations, 2.000% – 9.000% due 04/01/2017 – 07/01/2047, Federal National Mortgage Associations, 0.000% – 8.500% due 04/25/2017 – 08/01/2048, and U.S. Treasury Notes, 1.000% – 2.500% due 11/30/2018 – 02/15/2027, valued at $969,000,067); expected proceeds $950,149,625		0.810	%		04/07/2017		04/07/2017	$	950,000,000	$	950,000,000
Agreement with Goldman Sachs & Co. and Bank of New York Mellon (Tri-Party), dated 03/27/2017 (collateralized by Federal Farm Credit Banks, 0.867% – 5.150% due 01/08/2018 – 09/01/2038, Federal Home Loan Banks, 0.770% – 3.500% due 06/01/2017 – 06/01/2035, Federal Home Loan Discount Notes, 0.000% due 04/19/2017 – 07/24/2017, Federal National Mortgage Associations, 0.000% – 2.500% due 06/01/12017 – 09/14/2017, a U.S. Treasury Bill, 0.000% due 04/27/2017, U.S. Treasury Bonds, 2.750% – 2.875% due 11/15/2042 – 08/15/2045, and U.S. Treasury Notes, 0.500% – 3.500% due 07/31/2017 – 10/31/2022, valued at $229,501,356); expected proceeds $225,033,688		0.770	%		04/03/2017		04/03/2017		225,000,000		225,000,000
Agreement with Societe Generale and Bank of New York Mellon (Tri-Party), dated 03/28/2017 (collateralized by Federal Home Loan Banks, 0.875% – 1.000% due 10/01/2018 – 09/26/2019, Federal Home Loan Mortgage Corporations, 1.000% – 6.750% due 07/26/2019 – 03/15/2031, Federal National Mortgage Associations, 1.125% – 3.380% due 09/06/2019 – 01/01/2027, a Government National Mortgage Association, 3.500% due 01/20/2046, U.S. Treasury Bonds, 3.000% – 9.000% due 11/15/2018 – 02/15/2047, a U.S. Treasury Inflation Index Bond, 2.125% due 02/15/2041, U.S. Treasury Inflation Index Notes, 0.625% due 01/15/2024 – 01/15/2026, and U.S. Treasury Notes, 0.625% – 3.500% due 08/31/2017 – 12/31/2022, valued at $306,000,000); expected proceeds $300,044,917		0.770	%		04/04/2017		04/04/2017		300,000,000		300,000,000

See accompanying Notes to Schedule of Investments.

11

State Street Master Funds

State Street U.S. Government Money Market Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Name of Issuer and Title of Issue	Interest Rate			Next Rate Reset Date		Maturity Date		Principal Amount		Value
GOVERNMENT AGENCY REPURCHASE AGREEMENTS – (continued)
Agreement with Societe Generale and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by a Government National Mortgage Association, 3.500% due 03/20/2046, and U.S. Treasury Notes, 1.375% – 2.250% due 10/31/2020 – 11/15/2025, valued at $204,000,001); expected proceeds $200,030,333		0.780	%		04/07/2017		04/07/2017	$	200,000,000	$	200,000,000
Agreement with Societe Generale and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by Federal Home Loan Mortgage Corporations, 4.118% – 5.966% due 09/01/2020 – 06/01/2029, Federal National Mortgage Associations, 2.528% – 4.637% due 11/01/2017 – 05/01/2018, U.S. Treasury Bonds, 2.875% – 8.750% due 05/15/2017 – 08/15/2045, a U.S. Treasury Inflation Index Bonds, 2.125% – 3.875% due 04/15/2028 – 02/15/2041, U.S. Treasury Inflation Index Notes, 0.125% – 1.375% due 04/15/2018 – 07/15/2026, U.S. Treasury Notes, 0.500% – 3.625% due 04/30/2017 – 11/30/2023, and U.S. Treasury Strips, 0.000% due 05/15/2021 – 02/15/2025, valued at $793,560,000); expected proceeds $778,051,867		0.800	%		04/03/2017		04/03/2017		778,000,000		778,000,000
Agreement with Wells Fargo Bank and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by Federal Home Loan Mortgage Corporations, 3.500% – 4.000% due 02/01/2047 – 03/01/2047, and Federal National Mortgage Association, 3.500% – 4.000% due 02/01/2047 – 03/01/2047, valued at $2,142,144,586); expected proceeds $2,100,141,750		0.810	%		04/03/2017		04/03/2017		2,100,000,000		2,100,000,000
TOTAL GOVERNMENT AGENCY REPURCHASE AGREEMENTS											4,553,000,000
TREASURY REPURCHASE AGREEMENTS – 26.3%
Agreement with Bank of America and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by U.S. Treasury Notes, 1.125% – 1.500% due 05/31/2020 – 09/30/2021, valued at $26,801,561); expected proceeds $26,277,642		0.750	%		04/03/2017		04/03/2017		26,276,000		26,276,000

See accompanying Notes to Schedule of Investments.

12

State Street Master Funds

State Street U.S. Government Money Market Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Name of Issuer and Title of Issue	Interest Rate			Next Rate Reset Date		Maturity Date		Principal Amount		Value
TREASURY REPURCHASE AGREEMENTS – (continued)
Agreement with Bank of Nova Scotia and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by a U.S. Treasury Bond, 3.000% due 02/15/2047, and a U.S. Treasury Note, 2.125% due 03/31/2024 valued at $81,605,517); expected proceeds $80,005,333		0.800	%		04/03/2017		04/03/2017	$	80,000,000	$	80,000,000
Agreement with Barclays Bank PLC and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by a U.S. Treasury Inflation Index Note, 0.125% due 04/15/2019, and U.S. Treasury Notes, 0.750% – 2.500% due 05/15/2017 – 02/15/2027, valued at $2,297,040,065); expected proceeds $2,252,146,380		0.780	%		04/03/2017		04/03/2017		2,252,000,000		2,252,000,000
Agreement with BNP Paribas Securities Corp. and Bank of New York Mellon (Tri- Party), dated 01/13/2017 (collateralized by U.S. Treasury Inflation Index Notes, 0.125% – 0.375% due 04/15/2017 – 07/15/2023, and U.S. Treasury Notes 1.375% – 3.500% due 06/30/2017 – 11/30/2021, valued at $729,300,078); expected proceeds $715,984,317		0.590	%		04/07/2017		04/07/2017		715,000,000		715,000,000
Agreement with BNP Paribas Securities Corp. and Bank of New York Mellon (Tri- Party), dated 03/31/2017 (collateralized by a U.S. Treasury Inflation Index Bond, 3.875% due 04/15/2029, a U.S. Treasury Note 1.375% due 06/30/2023, and U.S. Treasury Strips, 0.000% due 11/15/2018 – 08/15/2021, valued at $129,473,786); expected proceeds $126,943,251		0.780	%		04/03/2017		04/03/2017		126,935,000		126,935,000
Agreement with Citigroup Global Markets, Inc. and Bank of New York Mellon (Tri- Party), dated 03/31/2017 (collateralized by a U.S. Treasury Bond, 3.000% due 05/15/2045, and a U.S. Treasury Note 2.125% due 06/30/2022, valued at $255,000,056); expected proceeds $250,038,403		0.790	%		04/07/2017		04/07/2017		250,000,000		250,000,000

See accompanying Notes to Schedule of Investments.

13

State Street Master Funds

State Street U.S. Government Money Market Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Name of Issuer and Title of Issue	Interest Rate			Next Rate Reset Date		Maturity Date		Principal Amount		Value
TREASURY REPURCHASE AGREEMENTS – (continued)
Agreement with Citigroup Global Markets, Inc. and Bank of New York Mellon (Tri- Party), dated 03/31/2017 (collateralized by U.S. Treasury Bonds, 2.500% – 3.875% due 08/15/2040 – 11/15/2046, and U.S. Treasury Notes, 0.625% – 2.500% due 06/30/2017 – 05/15/2025, valued at $459,000,090); expected proceeds $450,070,000		0.800	%		04/07/2017		04/07/2017	$	450,000,000	$	450,000,000
Agreement with Federal Reserve Bank of New York and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by U.S. Treasury Bonds, 3.000% – 4.750% due 02/15/2041 – 05/15/2042, and a U.S. Treasury Note, 1.625% due 08/15/2022, valued at $6,873,429,664); expected proceeds $6,873,429,563		0.750	%		04/03/2017		04/03/2017		6,873,000,000		6,873,000,000
Agreement with Goldman Sachs & Co. and Bank of New York Mellon (Tri-Party), dated 03/30/2017 (collateralized by a U.S. Treasury Bill, 0.000% due 05/11/2017, a U.S. Treasury Bond, 3.000% due 11/15/2044, and U.S. Treasury Notes, 0.625% – 4.750% due 08/15/2017 – 05/15/2026, valued at $204,000,022); expected proceeds $200,029,944		0.770	%		04/06/2017		04/06/2017		200,000,000		200,000,000
Agreement with Lloyds Bank PLC, dated 03/29/2017 (collateralized by a U.S. Treasury Inflation Index Bond, 0.625% due 02/15/2043, and U.S. Treasury Notes, 2.250% – 8.000% due 11/15/2020 – 02/15/2025, valued at $515,091,905); expected proceeds $500,075,833		0.780	%		04/05/2017		04/05/2017		500,000,000		500,000,000
Agreement with Mitsubishi UFJ Securities, Inc. and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by U.S. Treasury Bonds, 3.000% – 8.500% due 02/15/2020 – 08/15/2043, a U.S. Treasury Inflation Index Bond, 3.875% due 04/15/2029, U.S. Treasury Inflation Index Notes, 0.125% – 0.375% due 07/15/2023 – 07/15/2024, and U.S. Treasury Notes, 0.625% – 3.625% due 06/30/2017 – 02/15/2027, valued at $306,019,965); expected proceeds $300,019,500		0.780	%		04/03/2017		04/03/2017		300,000,000		300,000,000

See accompanying Notes to Schedule of Investments.

14

State Street Master Funds

State Street U.S. Government Money Market Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Name of Issuer and Title of Issue	Interest Rate			Next Rate Reset Date		Maturity Date		Principal Amount		Value
TREASURY REPURCHASE AGREEMENTS – (continued)
Agreement with MUFG Securities, dated 02/24/2017 (collateralized by U.S. Treasury Notes, 1.125% – 2.500% due 02/28/2021 – 05/15/2046, valued at $203,852,006); expected proceeds $200,203,222(c)		0.620	%		04/24/2017		04/24/2017	$	200,000,000	$	200,000,000
Agreement with MUFG Securities, dated 03/08/2017 (collateralized by U.S. Treasury Notes, 1.125% – 2.250% due 06/30/2021 – 02/15/2026, valued at $204,854,141); expected proceeds $200,141,167(c)		0.770	%		04/10/2017		04/10/2017		200,000,000		200,000,000
Agreement with MUFG Securities, dated 03/29/2017 (collateralized by U.S. Treasury Notes, 0.750% – 2.125% due 08/31/2018 – 02/15/2026, valued at $228,784,295); expected proceeds $225,043,875		0.780	%		04/07/2017		04/07/2017		225,000,000		225,000,000
Agreement with MUFG Securities, dated 03/31/2017 (collateralized by U.S. Treasury Notes, 0.875% – 5.250% due 05/31/2018 – 05/15/2046, valued at $193,102,189); expected proceeds $189,212,456		0.790	%		04/03/2017		04/03/2017		189,200,000		189,200,000
Agreement with TD Securities (USA) LLC and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by U.S. Treasury Inflation Index Notes, 0.375% – 1.125% due 01/15/2021 – 07/15/2023, valued at $80,585,480); expected proceeds $79,005,267		0.800	%		04/03/2017		04/03/2017		79,000,000		79,000,000
TOTAL TREASURY REPURCHASE AGREEMENTS											12,666,411,000
TOTAL INVESTMENTS – 99.1%(d)(e)											47,765,906,381
Other Assets in Excess of Liabilities – 0.9%											450,799,575
NET ASSETS – 100.0%										$	48,216,705,956

^(a)  Variable Rate Security – Interest rate shown is rate in effect at March 31, 2017.

^(b)  Rate represents annualized yield at date of purchase.

^(c)  Illiquid security. These securities represent $400,000,000 or 0.8% of net assets as of March 31, 2017.

^(d)  Also represents the cost for federal tax purposes.

^(e)  Unless otherwise indicated, the values of the securities of the Portfolio are determined based on Level 2 inputs (see accompanying notes to schedule of investments).

See accompanying Notes to Schedule of Investments.

15

State Street Institutional Treasury Money Market Fund is a feeder fund that invests substantially all of its investable assets in a master fund, the State Street Treasury Money Market Portfolio. The schedule of investments for the State Street Treasury Money Market Portfolio follows.

State Street Master Funds

State Street Treasury Money Market Portfolio

Schedule of Investments

March 31, 2017 (Unaudited)

Name of Issuer and Title of Issue	Interest Rate			Next Rate Reset Date		Maturity Date		Principal Amount		Value
TREASURY DEBT – 100.0%
U.S. Treasury Bill(a)		0.470	%		04/20/2017		04/20/2017	$	2,025,000,000	$	2,024,322,470
U.S. Treasury Bill(a)		0.483	%		04/27/2017		04/27/2017		1,880,000,000		1,879,183,869
U.S. Treasury Bill(a)		0.495	%		04/13/2017		04/13/2017		1,726,958,000		1,726,621,969
U.S. Treasury Bill(a)		0.518	%		05/04/2017		05/04/2017		859,000,000		858,593,982
U.S. Treasury Bill(a)		0.530	%		04/06/2017		04/06/2017		900,810,000		900,745,572
U.S. Treasury Bill(a)		0.615	%		05/25/2017		05/25/2017		347,000,000		346,703,982
U.S. Treasury Bill(a)		0.615	%		06/08/2017		06/08/2017		100,000,000		99,883,833
U.S. Treasury Bill(a)		0.620	%		06/01/2017		06/01/2017		153,000,000		152,841,103
U.S. Treasury Bill(a)		0.625	%		05/18/2017		05/18/2017		150,000,000		149,878,303
U.S. Treasury Bill(a)		0.645	%		06/15/2017		06/15/2017		808,000,000		806,716,348
U.S. Treasury Bill(a)		0.760	%		06/22/2017		06/22/2017		602,000,000		600,957,871
U.S. Treasury Bill(a)		0.778	%		06/29/2017		06/29/2017		649,000,000		647,749,470
U.S. Treasury Bill(a)		0.890	%		09/21/2017		09/21/2017		100,000,000		99,572,306
U.S. Treasury Bill(a)		0.910	%		09/14/2017		09/14/2017		100,000,000		99,580,873
U.S. Treasury Note(a)		0.534	%		04/15/2017		04/15/2017		125,000,000		125,016,316
U.S. Treasury Note(a)		0.799	%		04/30/2017		04/30/2017		125,000,000		125,007,290
U.S. Treasury Note(a)		0.800	%		04/30/2017		04/30/2017		125,000,000		125,231,614
U.S. Treasury Note(a)		0.820	%		07/31/2017		07/31/2017		32,000,000		32,165,607
U.S. Treasury Note(a)		0.825	%		07/31/2017		07/31/2017		32,000,000		31,978,653
U.S. Treasury Note, 3 Month USD MMY + 0.07%(b)		0.856	%		04/01/2017		04/30/2017		464,900,000		464,916,262
U.S. Treasury Note, 3 Month USD MMY + 0.08%(b)		0.859	%		04/01/2017		07/31/2017		358,500,000		358,467,084
U.S. Treasury Note, 3 Month USD MMY + 0.17%(b)		0.950	%		04/01/2017		10/31/2017		180,500,000		180,473,441
U.S. Treasury Note, 3 Month USD MMY + 0.17%(b)		0.956	%		04/01/2017		07/31/2018		256,000,000		256,201,385
U.S. Treasury Note, 3 Month USD MMY + 0.19%(b)		0.972	%		04/04/2017		04/30/2018		499,820,000		500,171,636
U.S. Treasury Note, 3 Month USD MMY + 0.27%(b)		1.054	%		04/01/2017		01/31/2018		333,000,000		333,456,193
TOTAL TREASURY DEBT											12,926,437,432
TOTAL INVESTMENTS – 100.0%(c)(d)											12,926,437,432
Other Assets in Excess of Liabilities – 0.0%(e)											4,300,937
NET ASSETS – 100.0%										$	12,930,738,369

See accompanying Notes to Schedule of Investments.

16

State Street Master Funds

State Street Treasury Money Market Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

^(a)  Rate represents annualized yield at date of purchase.

^(b)  Variable Rate Security – Interest rate shown is rate in effect at March 31, 2017.

^(c)  Unless otherwise indicated, the values of the securities of the Fund are determined based on Level 2 inputs (see accompanying notes to schedule of investments).

^(d)  Also represents the cost for federal tax purposes.

^(e)  Amount is less than 0.05% of net assets.

See accompanying Notes to Schedule of Investments.

17

State Street Institutional Treasury Plus Money Market Fund is a feeder fund that invests substantially all of its investable assets in a master fund, the State Street Treasury Plus Money Market Portfolio. The schedule of investments for the State Street Treasury Plus Money Market Portfolio follows.

State Street Master Funds

State Street Treasury Plus Money Market Portfolio

Schedule of Investments

March 31, 2017 (Unaudited)

Name of Issuer and Title of Issue	Interest Rate			Next Rate Reset Date		Maturity Date		Principal Amount		Value
TREASURY DEBT – 67.9%
U.S. Treasury Bill(a)		0.470	%		04/20/2017		04/20/2017	$	925,000,000	$	924,676,335
U.S. Treasury Bill(a)		0.483	%		04/27/2017		04/27/2017		875,000,000		874,599,390
U.S. Treasury Bill(a)		0.490	%		04/06/2017		04/06/2017		475,000,000		474,965,413
U.S. Treasury Bill(a)		0.495	%		04/13/2017		04/13/2017		750,000,000		749,846,289
U.S. Treasury Bill(a)		0.518	%		05/04/2017		05/04/2017		300,000,000		299,858,203
U.S. Treasury Bill(a)		0.615	%		05/25/2017		05/25/2017		75,000,000		74,931,037
U.S. Treasury Bill(a)		0.615	%		06/08/2017		06/08/2017		75,000,000		74,912,875
U.S. Treasury Bill(a)		0.620	%		06/01/2017		06/01/2017		100,000,000		99,896,131
U.S. Treasury Bill(a)		0.625	%		05/18/2017		05/18/2017		100,000,000		99,918,866
U.S. Treasury Bill(a)		0.645	%		06/15/2017		06/15/2017		575,000,000		574,083,854
U.S. Treasury Bill(a)		0.760	%		06/22/2017		06/22/2017		250,000,000		249,567,222
U.S. Treasury Bill(a)		0.778	%		06/29/2017		06/29/2017		400,000,000		399,229,254
U.S. Treasury Bill(a)		0.890	%		09/21/2017		09/21/2017		75,000,000		74,679,229
U.S. Treasury Bill(a)		0.910	%		09/14/2017		09/14/2017		75,000,000		74,685,661
U.S. Treasury Note(a)		0.820	%		07/31/2017		07/31/2017		24,000,000		24,124,205
U.S. Treasury Note(a)		0.825	%		07/31/2017		07/31/2017		24,000,000		23,983,990
U.S. Treasury Note, 3 Month USD MMY + 0.07%(b)		0.856	%		04/01/2017		04/30/2017		279,930,000		279,935,166
U.S. Treasury Note, 3 Month USD MMY + 0.08%(b)		0.859	%		04/01/2017		07/31/2017		309,500,000		309,475,633
U.S. Treasury Note, 3 Month USD MMY + 0.17%(b)		0.950	%		04/01/2017		10/31/2017		254,500,000		254,408,871
U.S. Treasury Note, 3 Month USD MMY + 0.17%(b)		0.956	%		04/01/2017		07/31/2018		164,000,000		164,145,374
U.S. Treasury Note, 3 Month USD MMY + 0.19%(b)		0.972	%		04/04/2017		04/30/2018		307,836,000		308,025,319
U.S. Treasury Note, 3 Month USD MMY + 0.27%(b)		1.054	%		04/01/2017		01/31/2018		238,000,000		238,314,843
TOTAL TREASURY DEBT											6,648,263,160
TREASURY REPURCHASE AGREEMENTS – 29.5%
Agreement with Bank of Nova Scotia and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by U.S. Treasury Inflation Index Bonds, 0.750% – 2.500% due 01/15/2029 – 02/15/2046, and a U.S. Treasury Note, 1.125% due 07/31/2021, valued at $25,501,679); expected proceeds $25,001,646		0.790	%		04/03/2017		04/03/2017		25,000,000		25,000,000

See accompanying Notes to Schedule of Investments.

18

State Street Master Funds

State Street Treasury Plus Money Market Portfolio

Schedule of Investments — (continued)

March 31, 2017 (Unaudited)

Name of Issuer and Title of Issue	Interest Rate			Next Rate Reset Date		Maturity Date		Principal Amount		Value
TREASURY REPURCHASE AGREEMENTS – (continued)
Agreement with BNP Paribas Securities Corp. and Bank of New York Mellon (Tri-Party), dated 01/13/2017 (collateralized by a U.S. Treasury Bond, 3.125% due 02/15/2043, a U.S. Treasury Inflation Index Note, 0.625% due 01/15/2024, U.S. Treasury Notes, 1.375% – 2.250% due 09/30/2017 – 04/30/2021, and a U.S. Treasury Strip, 0.000% due 02/15/2027, valued at $163,200,000); expected proceeds $160,220,267		0.590	%		04/07/2017		04/07/2017	$	160,000,000	$	160,000,000
Agreement with BNP Paribas Securities Corp. and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by a U.S. Treasury Bond, 2.500% due 05/15/2046, a U.S. Treasury Inflation Index Bond, 2.375% due 01/15/2025, and a U.S. Treasury Inflation Index Note, 2.625% due 07/15/2017, valued at $102,000,088); expected proceeds $100,006,500		0.780	%		04/03/2017		04/03/2017		100,000,000		100,000,000
Agreement with Federal Reserve Bank of New York and Bank of New York Mellon (Tri-Party), dated 03/31/2017 (collateralized by U.S. Treasury Bonds, 3.000% – 4.750% due 02/15/2041 – 05/15/2042, and U.S. Treasury Notes, 1.625% – 3.625% due 02/15/2020 – 08/15/2022, valued at $2,605,162,834); expected proceeds $2,605,162,813		0.750	%		04/03/2017		04/03/2017		2,605,000,000		2,605,000,000
TOTAL TREASURY REPURCHASE AGREEMENTS											2,890,000,000
TOTAL INVESTMENTS – 97.4%(c)(d)											9,538,263,160
Other Assets in Excess of Liabilities – 2.6%											256,138,794
NET ASSETS – 100.0%										$	9,794,401,954

^(a)  Rate represents annualized yield at date of purchase.

^(b)  Variable Rate Security – Interest rate shown is rate in effect at March 31, 2017.

^(c)  Unless otherwise indicated, the values of the securities of the Fund are determined based on Level 2 inputs (see accompanying notes to schedule of investments).

^(d)  Also represents the cost for federal tax purposes.

See accompanying Notes to Schedule of Investments.

19

State Street Institutional Investment Trust

Notes to Schedules of Investments

March 31, 2017 (Unaudited)

Security Valuation

The investments of the Portfolios are valued pursuant to the policy and procedures developed by the Oversight Committee (the “Committee”) and approved by the Board of Trustees of the Trust (the “Board”). The Committee provides oversight of the valuation of investments for the Portfolio. The Board has responsibility for determining the fair value of investments.

The State Street Money Market Portfolio’s investments are valued at fair value each day that the Portfolio’s listing exchange is open and, for financial reporting purposes, as of the report date should the reporting period end on a day that the Portfolio’s listing exchange is not open. Fair value is generally defined as the price a fund would receive to sell an asset or pay to transfer a liability in an orderly transaction between market participants at the measurement date. By its nature, a fair value price is a good faith estimate of the valuation in a current sale and may not reflect an actual market price.

The State Street U.S. Government Money Market Portfolio, the State Street Treasury Money Market Portfolio, and the State Street Treasury Plus Money Market Portfolio securities are recorded on the basis of amortized cost which approximates fair value as permitted by Rule 2a-7 under the Investment Company Act of 1940. This method values a security at its cost on the date of purchase and, thereafter, assumes a constant amortization to maturity of any premiums or accretion of any discounts.

Because of the inherent uncertainties of valuation and under certain market conditions, the values reflected in the financial statements may differ from the value received upon actual sale of those investments and it is possible that the differences could be material.

Various inputs are used in determining the value of the Portfolios’ investments. The Portfolios value their assets and liabilities at fair value using a fair value hierarchy consisting of three broad levels that prioritize the inputs to valuation techniques giving the highest priority to readily available unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements) when market prices are not readily available or reliable. The categorization of a value determined for an investment within the hierarchy is based upon the pricing transparency of the investment and is not necessarily an indication of the risk associated with investing in it.

The three levels of the fair value hierarchy are as follows:

• Level 1 – Unadjusted quoted prices in active markets for identical assets or liabilities;

• Level 2 – Inputs other than quoted prices included within Level 1 that are observable for the asset or liability either directly or indirectly, including quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not considered to be active, inputs other than quoted prices that are observable for the asset or liability (such as exchange rates, financing terms, interest rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates) or other market-corroborated inputs; and

• Level 3 – Unobservable inputs for the asset or liability, including the Committee’s assumptions used in determining the fair value of investments.

Changes in valuation techniques may result in transfers in or out of an assigned level within the fair value hierarchy. Transfers between different levels of the fair value hierarchy are recognized at the end

20

State Street Institutional Investment Trust

Notes to Schedules of Investments — (continued)

March 31, 2017 (Unaudited)

of the reporting period. The Portfolios had no transfers between levels for the period ended March 31, 2017.

Aggregate Unrealized Appreciation and Depreciation

As of March 31, 2017, gross unrealized appreciation and gross unrealized depreciation based on cost for federal income tax purposes were as follows:

	Tax Cost		Gross Unrealized Appreciation		Gross Unrealized Depreciation		Net Unrealized Appreciation (Depreciation)
State Street Institutional Liquid Reserves Fund	$	8,993,094,311	$	1,117,847	$	–	$	1,117,847

21

Item 2. Controls and Procedures.

(a) The registrant’s principal executive officer and principal financial officer have concluded that the registrant’s disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended, (the “1940 Act”)) are effective based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of this document.

(b) The registrant’s principal executive officer and principal financial officer are aware of no changes in the registrant’s internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act) that occurred during the registrant’s last fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

Item 3. Exhibits.

The certifications required by Rule 30a-2(a) under the 1940 Act (17 CFR 270.30a-2(a)) are attached hereto.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, and the Investment Company Act of 1940, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

State Street Institutional Investment Trust
BY:	/s/ Ellen M. Needham
	Ellen M. Needham
	President and Principal Executive Officer
Date:	May 23, 2017

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, and the Investment Company Act of 1940, as amended, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

BY:	/s/ Ellen M. Needham
	Ellen M. Needham
	President and Principal Executive Officer
Date:	May 23, 2017

BY:	/s/ Bruce Rosenberg
	Bruce Rosenberg
	Treasurer and Principal Financial Officer
Date:	May 23, 2017

EX-99.CERT

CERTIFICATIONS

I, Ellen M. Needham, certify that:

1. I have reviewed this report on Form N-Q of State Street Institutional Investment Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the schedules of investments included in this report fairly present in all material respects the investments of the registrant as of the end of the fiscal quarter for which the report is filed;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report, based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

BY:	/s/ Ellen M. Needham
	Ellen M. Needham
	President and Principal Executive Officer
Date:	May 23, 2017

I, Bruce Rosenberg, certify that:

1. I have reviewed this report on Form N-Q of State Street Institutional Investment Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the schedules of investments included in this report fairly present in all material respects the investments of the registrant as of the end of the fiscal quarter for which the report is filed;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report, based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

By:	/s/ Bruce Rosenberg
	Bruce Rosenberg
	Treasurer and Principal Financial Officer
Date:	May 23, 2017