Schedule of Investments (unaudited) September 30, 2023 iShares Russell 2000 Small-Cap Index Fund (Percentages shown are based on Net Assets)

Mutual Fund	Value
Master Small Cap Index Series of Quantitative Master Series LLC	$	2,409,878,134
Total Investments — 100.0% (Cost: $2,246,015,025)		2,409,878,134
Liabilities in Excess of Other Assets — (0.0)%		(275,628	)
Net Assets — 100.0%	$	2,409,602,506

iShares Russell 2000 Small-Cap Index Fund (the “Fund”) seeks to achieve its investment objective by investing all of its assets in Master Small Cap Index Series (the “Series”), which has the same investment objective and strategies as the Fund. As of September 30, 2023, the value of the investment and the percentage owned by the Fund of the Series was $2,409,878,134 and 59.6%, respectively.

The Fund records its investment in the Series at fair value. The Fund’s investment in the Series is valued pursuant to the pricing policies approved by the Board of Directors of the Series.

Fair Value Hierarchy as of Period End

Various inputs are used in determining the fair value of financial instruments. These inputs to valuation techniques are categorized into a fair value hierarchy consisting of three broad levels for financial reporting purposes as follows:

• Level 1 – Unadjusted price quotations in active markets/exchanges for identical assets or liabilities that the Fund has the ability to access;

• Level 2 – Other observable inputs (including, but not limited to, quoted prices for similar assets or liabilities in markets that are active, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the assets or liabilities (such as interest rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates) or other market–corroborated inputs); and

• Level 3 – Unobservable inputs based on the best information available in the circumstances, to the extent observable inputs are not available (including the Valuation Committee’s assumptions used in determining the fair value of financial instruments).

The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). Accordingly, the degree of judgment exercised in determining fair value is greatest for instruments categorized in Level 3. The inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the fair value hierarchy classification is determined based on the lowest level input that is significant to the fair value measurement in its entirety. Investments classified within Level 3 have significant unobservable inputs used by the Valuation Committee in determining the price for Fair Valued Investments. Level 3 investments include equity or debt issued by privately held companies or funds. There may not be a secondary market, and/or there are a limited number of investors. The categorization of a value determined for investments is based on the pricing transparency of the investments and is not necessarily an indication of the risks associated with investing in those securities. For information about the Fund’s policy regarding valuation of investments, refer to the Fund’s most recent financial statements.

Certain investments of the Fund were fair valued using net asset value (“NAV”) as a practical expedient or its equivalent as no quoted market value is available and therefore have been excluded from the fair value hierarchy.

1

Schedule of Investments (unaudited) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Common Stocks
Advertising Agencies(a) — 0.2%
Advantage Solutions, Inc., Class A(b)		151,250	$	429,550
Boston Omaha Corp., Class A(b)		43,005		704,852
Cardlytics, Inc.(b)		60,068		991,122
Clear Channel Outdoor Holdings, Inc.		666,996		1,053,854
Emerald Holding, Inc.		24,352		110,071
QuinStreet, Inc.(b)		92,401		828,837
Thryv Holdings, Inc.		55,182		1,035,766
Viad Corp.		36,582		958,448
				6,112,500
Aerospace — 0.1%
Macerich Co.		384,531		4,195,233
Aerospace & Defense — 0.9%
AAR Corp.(a)		61,368		3,653,237
AeroVironment, Inc.(a)		46,283		5,161,943
AerSale Corp.(a)(b)		45,519		680,054
Archer Aviation, Inc., Class A(a)(b)		271,292		1,372,738
Astronics Corp.(a)		46,222		733,081
Cadre Holdings, Inc.		35,339		941,784
Ducommun, Inc., Series WWW(a)		23,267		1,012,347
Eve Holding, Inc.(b)		33,526		277,931
Kaman Corp.		50,070		983,875
Kratos Defense & Security Solutions, Inc.(a)(b)		222,841		3,347,072
Leonardo DRS, Inc.(a)(b)		89,799		1,499,643
Moog, Inc., Class A		50,490		5,703,350
National Presto Industries, Inc.		9,426		683,008
Park Aerospace Corp.		33,552		521,063
Parsons Corp.(a)(b)		73,421		3,990,431
Redwire Corp.(a)(b)		9,701		28,036
Rocket Lab USA, Inc.(a)(b)		495,861		2,171,871
Terran Orbital Corp.(a)		147,132		122,473
Triumph Group, Inc.(a)		114,726		878,801
V2X, Inc.(a)		20,509		1,059,495
Virgin Galactic Holdings, Inc.(a)(b)		440,830		793,494
				35,615,727
Agriculture, Fishing & Ranching — 0.2%
Alico, Inc.		13,435		335,338
Andersons, Inc.		57,263		2,949,617
Cadiz, Inc.(a)		68,917		228,115
Calavo Growers, Inc.		31,229		787,908
Cal-Maine Foods, Inc.		67,932		3,289,267
Fresh Del Monte Produce, Inc.		60,559		1,564,844
GrowGeneration Corp.(a)(b)		102,190		298,395
				9,453,484
Air Transport — 0.5%
Air Transport Services Group, Inc.(a)(b)		100,238		2,091,967
Allegiant Travel Co.		28,118		2,161,149
Frontier Group Holdings, Inc.(a)		69,853		338,089
Hawaiian Holdings, Inc.(a)(b)		87,756		555,495
JetBlue Airways Corp.(a)(b)		588,341		2,706,369
Joby Aviation, Inc., Class A(a)(b)		495,793		3,197,865
SkyWest, Inc.(a)		78,206		3,279,960
Spirit Airlines, Inc.		195,181		3,220,486
Sun Country Airlines Holdings, Inc.(a)		67,249		997,975
				18,549,355
Airlines — 0.0%
Blade Air Mobility, Inc., Class A(a)		113,832		294,825

Security	Shares		Value
Alternative Energy — 0.5%
Ameresco, Inc., Class A(a)(b)		57,206	$	2,205,863
Centrus Energy Corp., Class A(a)(b)		21,836		1,239,411
Green Brick Partners, Inc.(a)		46,398		1,925,981
Green Plains, Inc.(a)(b)		51,340		1,545,334
Permian Resources Corp., Class A		490,836		6,852,071
REX American Resources Corp.(a)		27,582		1,123,139
Sitio Royalties Corp., Class A		143,590		3,476,314
Sunnova Energy International, Inc.(a)(b)		179,618		1,880,601
				20,248,714
Aluminum — 0.1%
Century Aluminum Co.(a)		95,060		683,482
Kaiser Aluminum Corp.		28,374		2,135,427
				2,818,909
Asset Management & Custodian — 0.7%
Artisan Partners Asset Management, Inc., Class A		104,092		3,895,123
AssetMark Financial Holdings, Inc.(a)		39,097		980,553
B. Riley Financial, Inc.		33,250		1,362,917
Brightsphere Investment Group, Inc.		57,934		1,123,340
Cohen & Steers, Inc.		46,261		2,900,102
Diamond Hill Investment Group, Inc.		5,136		865,776
GCM Grosvenor, Inc., Class A		71,690		556,314
Hamilton Lane, Inc., Class A		65,011		5,879,595
Open Lending Corp., Class A(a)		177,013		1,295,735
PJT Partners, Inc., Class A		42,214		3,353,480
Sculptor Capital Management, Inc.		38,470		446,252
Silvercrest Asset Management Group, Inc., Class A		17,353		275,392
StepStone Group, Inc., Class A		95,966		3,030,606
Virtus Investment Partners, Inc.		12,330		2,490,537
WisdomTree, Inc.		245,491		1,718,437
				30,174,159
Auto Components(a) — 0.1%
Atmus Filtration Technologies, Inc.		29,252		609,904
Holley, Inc.		94,475		471,430
Luminar Technologies, Inc., Class A(b)		484,397		2,204,006
Solid Power, Inc., Class A(b)		270,631		546,675
				3,832,015
Auto Parts — 1.0%
Adient PLC(a)		169,999		6,238,963
American Axle & Manufacturing Holdings, Inc., Series A(a)		203,089		1,474,426
CarParts.com, Inc.(a)		98,455		405,635
Dana, Inc.		231,958		3,402,824
Dorman Products, Inc.(a)		46,855		3,549,735
Fisker, Inc., Series C, Class A(a)(b)		348,867		2,239,726
Fox Factory Holding Corp.(a)		75,901		7,520,271
Gentherm, Inc.(a)		58,899		3,195,860
Livewire Group, Inc.(b)		17,127		118,690
Standard Motor Products, Inc.		37,647		1,265,692
Stoneridge, Inc.(a)		47,060		944,494
Visteon Corp.(a)		50,034		6,908,194
Workhorse Group, Inc.(a)(b)		275,096		114,000
XPEL, Inc.(a)		40,226		3,101,827
				40,480,337
Auto Services — 0.2%
Goodyear Tire & Rubber Co.(a)		500,933		6,226,597
Back Office Support, HR & Consulting — 1.7%
ASGN, Inc.(a)(b)		85,777		7,006,265
Barrett Business Services, Inc.		11,895		1,073,405
CBIZ, Inc.(a)		85,272		4,425,617

S E R I E S   S C H E D U L E   O F   I N V E S T M E N T S 1

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Back Office Support, HR & Consulting (continued)
Conduent, Inc.(a)		306,041	$	1,065,023
CRA International, Inc.		12,090		1,218,188
DHI Group, Inc.(a)		77,446		236,985
ExlService Holdings, Inc.(a)		287,674		8,066,379
Forrester Research, Inc.(a)		20,894		603,837
Hackett Group, Inc.		44,629		1,052,798
Heidrick & Struggles International, Inc.		35,263		882,280
HireQuest, Inc.		8,825		136,170
Huron Consulting Group, Inc.(a)		33,872		3,528,108
ICF International, Inc.(b)		33,313		4,024,544
Insperity, Inc.		64,851		6,329,458
Kelly Services, Inc., Class A		56,807		1,033,319
Kforce, Inc.		34,470		2,056,480
Korn Ferry		92,821		4,403,428
Liquidity Services, Inc.(a)		40,986		722,173
Maximus, Inc.		108,225		8,082,243
NV5 Global, Inc.(a)		24,449		2,352,727
Resources Connection, Inc.		57,688		860,128
Target Hospitality Corp.(a)(b)		56,424		896,013
TriNet Group, Inc.(a)(b)		67,005		7,804,742
TrueBlue, Inc.(a)		55,028		807,261
TTEC Holdings, Inc.		34,584		906,792
				69,574,363
Banks — 0.0%
John Marshall Bancorp, Inc.		21,461		383,079
USCB Financial Holdings, Inc., Class A(a)		16,653		175,023
				558,102
Banks: Diversified — 7.5%
1st Source Corp.		29,654		1,248,137
ACNB Corp.		14,538		459,546
AlTi Global, Inc., Class A(a)(b)		33,743		234,851
Ambac Financial Group, Inc.(a)		79,115		954,127
Amerant Bancorp, Inc., Class A		45,907		800,618
American National Bankshares, Inc.		18,537		703,294
Ameris Bancorp		117,762		4,520,883
Ames National Corp.		15,023		249,232
Arrow Financial Corp.		27,075		460,816
Associated Banc-Corp.		269,338		4,608,373
Atlantic Union Bankshares Corp.		119,469		3,438,318
Axos Financial, Inc.(a)		101,160		3,829,918
Banc of California, Inc.		89,217		1,104,506
BancFirst Corp.		39,201		3,399,903
Banco Latinoamericano de Comercio Exterior SA, Class E		48,915		1,036,998
Bancorp, Inc.(a)		93,932		3,240,654
Bank First Corp.		16,602		1,280,844
Bank of Hawaii Corp.		61,336		3,047,786
Bank of Marin Bancorp		27,506		502,810
Bank of NT Butterfield & Son Ltd.		89,164		2,414,561
Bank7 Corp.		6,514		146,630
BankUnited, Inc.		115,702		2,626,435
Bankwell Financial Group, Inc.		10,372		251,728
Banner Corp.		52,372		2,219,525
Bar Harbor Bankshares		26,929		636,332
BayCom Corp., Series 2020		19,853		381,376
BCB Bancorp, Inc.		25,133		279,982
Berkshire Hills Bancorp, Inc.		62,941		1,261,967
Blue Ridge Bankshares, Inc.		27,012		122,094
Bridgewater Bancshares, Inc.(a)		35,658		338,038
Burke & Herbert Financial Services Corp.		11,235		522,034
Business First Bancshares, Inc.		43,475		815,591

Security	Shares		Value
Banks: Diversified (continued)
Byline Bancorp, Inc.		44,679	$	880,623
C&F Financial Corp.		5,730		307,128
Cadence Bank		265,097		5,625,358
Cambridge Bancorp		13,654		850,508
Camden National Corp.		26,000		733,720
Capital Bancorp, Inc.		16,840		322,149
Capital City Bank Group, Inc.		22,919		683,674
Capitol Federal Financial, Inc.		227,127		1,083,396
Capstar Financial Holdings, Inc.		34,372		487,739
Carter Bankshares, Inc.(a)		41,122		515,259
Cathay General Bancorp		115,863		4,027,398
Central Pacific Financial Corp.		36,134		602,715
Central Valley Community Bancorp		17,431		245,951
Chemung Financial Corp.		6,111		242,057
ChoiceOne Financial Services, Inc.		12,186		239,333
Citizens & Northern Corp.		25,956		455,528
Citizens Financial Services, Inc.		7,146		342,436
City Holding Co.		24,459		2,209,871
Civista Bancshares, Inc.		26,972		418,066
CNB Financial Corp.		36,894		668,150
Coastal Financial Corp.(a)(b)		19,245		825,803
Codorus Valley Bancorp, Inc.		16,311		304,037
Colony Bankcorp, Inc.		29,633		296,182
Columbia Financial, Inc.(a)(b)		53,961		847,727
Community Bank System, Inc.		86,724		3,660,620
Community Trust Bancorp, Inc., Series 20-A		27,642		947,015
ConnectOne Bancorp, Inc.		65,949		1,175,871
CrossFirst Bankshares, Inc.(a)		79,824		805,424
Customers Bancorp, Inc.(a)		50,900		1,753,505
CVB Financial Corp.		221,747		3,674,348
Eagle Bancorp, Inc.		49,202		1,055,383
Eastern Bankshares, Inc.		275,744		3,457,830
Enterprise Bancorp, Inc.		16,303		446,376
Enterprise Financial Services Corp.		64,563		2,421,112
Equity Bancshares, Inc., Class A		25,523		614,339
Esquire Financial Holdings, Inc.		12,602		575,785
ESSA Bancorp, Inc.		15,158		227,522
Evans Bancorp, Inc.		9,139		244,925
Farmers & Merchants Bancorp, Inc.		20,766		364,028
Farmers National Banc Corp.		64,788		748,949
FB Financial Corp.		63,126		1,790,253
Fidelity D&D Bancorp, Inc.		8,135		369,329
Financial Institutions, Inc.		27,991		471,089
First Bancorp, Inc.		17,071		401,168
First BanCorp./Puerto Rico		279,624		3,763,739
First Bancorp/Southern Pines NC		63,661		1,791,421
First Bancshares, Inc.		54,581		1,472,050
First Bank		34,208		368,762
First Busey Corp.		92,383		1,775,601
First Business Financial Services, Inc.		13,674		410,357
First Commonwealth Financial Corp.		175,977		2,148,679
First Community Bankshares, Inc.		31,542		928,912
First Community Corp.		12,860		222,092
First Financial Bancorp		163,588		3,206,325
First Financial Bankshares, Inc.		231,931		5,826,107
First Financial Corp.		20,894		706,426
First Foundation, Inc.		87,989		534,973
First Interstate BancSystem, Inc., Class A		146,998		3,666,130
First Merchants Corp.		105,190		2,926,386
First Mid Bancshares, Inc.		34,061		904,660
First of Long Island Corp.		39,152		450,640
First Western Financial, Inc.(a)		14,336		260,198

2

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Banks: Diversified (continued)
Five Star Bancorp, Series C		21,940	$	440,116
FS Bancorp, Inc.		11,563		341,108
Fulton Financial Corp.		271,157		3,283,711
FVCBankcorp, Inc.(a)		26,676		341,720
German American Bancorp, Inc.		49,895		1,351,656
Glacier Bancorp, Inc.		198,466		5,656,281
Guaranty Bancshares, Inc.		14,529		416,837
Hancock Whitney Corp.		154,409		5,711,589
Hanmi Financial Corp.		35,695		579,330
HarborOne Bancorp, Inc.		76,028		723,787
HBT Financial, Inc.		24,276		442,794
Heartland Financial USA, Inc.		75,209		2,213,401
Heritage Commerce Corp.		105,377		892,543
Hippo Holdings, Inc.(a)(b)		17,449		139,069
Home BancShares, Inc.		339,435		7,107,769
Hope Bancorp, Inc.		175,883		1,556,565
Horizon Bancorp, Inc.		78,356		836,842
Independent Bank Corp.		105,178		4,043,119
Independent Bank Group, Inc.		64,369		2,545,794
International Bancshares Corp.		95,583		4,142,567
Lakeland Bancorp, Inc.		110,956		1,400,265
Lakeland Financial Corp.		42,983		2,039,973
LCNB Corp.		18,447		263,239
Live Oak Bancshares, Inc.(b)		59,849		1,732,629
Luther Burbank Corp.		17,080		143,472
Macatawa Bank Corp.		45,275		405,664
MainStreet Bancshares, Inc.		12,152		249,602
Mercantile Bank Corp.		27,904		862,513
Merchants Bancorp		28,480		789,466
Metrocity Bankshares, Inc.		32,493		639,462
Metropolitan Bank Holding Corp.(a)		19,118		693,601
Mid Penn Bancorp, Inc.		24,430		491,776
Middlefield Banc Corp.		13,712		348,422
Midland States Bancorp, Inc.		38,112		782,820
MVB Financial Corp.		19,923		449,861
National Bank Holdings Corp., Class A		54,077		1,609,332
National Bankshares, Inc.		10,079		252,378
NBT Bancorp, Inc.		73,279		2,322,211
Nicolet Bankshares, Inc.(b)		22,897		1,597,753
Northeast Bank		11,928		526,025
Northeast Community Bancorp, Inc.		23,352		344,676
Northrim BanCorp, Inc.		9,603		380,471
Norwood Financial Corp.		12,876		331,686
Oak Valley Bancorp(b)		11,745		294,565
OFG Bancorp		77,119		2,302,773
Old National Bancorp		521,351		7,580,444
Old Second Bancorp, Inc.		77,197		1,050,651
Orange County Bancorp, Inc.(b)		8,911		384,688
Origin Bancorp, Inc.		51,920		1,498,930
Orrstown Financial Services, Inc.		18,376		386,080
Pacific Premier Bancorp, Inc.		160,048		3,482,644
PacWest Bancorp		209,408		1,656,417
Park National Corp.		25,499		2,410,165
Parke Bancorp, Inc.		17,784		289,701
PCB Bancorp		20,635		318,811
Peapack-Gladstone Financial Corp.(b)		30,885		792,200
Penns Woods Bancorp, Inc.		11,958		252,075
Peoples Bancorp, Inc.		60,217		1,528,307
Peoples Financial Services Corp.		12,156		487,456
Pioneer Bancorp, Inc.(a)(b)		20,117		171,799
Plumas Bancorp(b)		9,541		325,730
Ponce Financial Group, Inc.(a)(b)		34,079		266,498

Security	Shares		Value
Banks: Diversified (continued)
Preferred Bank/Los Angeles CA, Preference Shares		12,747	$	793,501
Primis Financial Corp.		34,918		284,582
Princeton Bancorp, Inc.		8,867		257,054
Provident Financial Services, Inc.		118,929		1,818,424
QCR Holdings, Inc.		29,327		1,422,946
RBB Bancorp		30,843		394,174
Red River Bancshares, Inc.(b)		7,806		358,764
Renasant Corp.		89,631		2,347,436
Republic Bancorp, Inc., Class A		15,590		686,739
S&T Bancorp, Inc.		68,884		1,865,379
Sandy Spring Bancorp, Inc.		78,006		1,671,669
Seacoast Banking Corp. of Florida		149,383		3,280,451
ServisFirst Bancshares, Inc.		90,648		4,729,106
Shore Bancshares, Inc.		52,163		548,755
Sierra Bancorp		25,643		486,191
Simmons First National Corp., Class A		193,623		3,283,846
SmartFinancial, Inc.		27,666		591,222
South Plains Financial, Inc.		21,387		565,472
Southern First Bancshares, Inc.(a)		13,074		352,214
Southern States Bancshares, Inc.(b)		13,089		295,681
Southside Bancshares, Inc.		52,329		1,501,842
SouthState Corp.		135,471		9,125,327
Stellar Bancorp, Inc.		86,602		1,846,355
Stock Yards Bancorp, Inc.		48,286		1,897,157
Summit Financial Group, Inc.		19,578		441,288
Texas Capital Bancshares, Inc.(a)		85,216		5,019,222
Third Coast Bancshares, Inc.(a)		22,224		380,030
Timberland Bancorp, Inc.		13,172		356,961
Tompkins Financial Corp.		24,657		1,207,946
Towne Bank		124,857		2,862,971
TriCo Bancshares		55,267		1,770,202
Triumph Financial, Inc.(a)(b)		39,537		2,561,602
TrustCo Bank Corp.		31,149		850,056
Trustmark Corp.		102,208		2,220,980
UMB Financial Corp.		78,797		4,889,354
United Bankshares, Inc., Series 16-2		232,850		6,424,331
United Community Banks, Inc., Series 16-2		204,544		5,197,463
Unity Bancorp, Inc.		12,604		295,312
Univest Financial Corp.		51,592		896,669
Valley National Bancorp		768,146		6,575,330
Veritex Holdings, Inc.		73,782		1,324,387
Virginia National Bankshares Corp.		8,243		250,175
Washington Trust Bancorp, Inc.		30,089		792,243
WesBanco, Inc.		102,651		2,506,737
West BanCorp, Inc.		27,302		445,296
Westamerica BanCorp		42,455		1,836,179
				303,333,894
Banks: Savings, Thrift & Mortgage Lending — 0.5%
Amalgamated Financial Corp.		30,335		522,369
Brookline Bancorp, Inc.		155,320		1,414,965
Finance of America Cos., Inc., Class A(a)		85,338		109,233
Flushing Financial Corp.		51,645		678,099
Great Southern Bancorp, Inc.		16,086		770,841
Greene County Bancorp, Inc.		11,935		287,037
Heritage Financial Corp.		61,709		1,006,474
Hingham Institution for Savings(b)		2,735		510,761
Home Bancorp, Inc.		12,514		398,821
HomeStreet, Inc.		31,841		248,041
Kearny Financial Corp.		100,738		698,114
Northfield Bancorp, Inc.		73,752		696,956
Northwest Bancshares, Inc.		199,164		2,037,448
OceanFirst Financial Corp.		103,640		1,499,671

S E R I E S   S C H E D U L E   O F   I N V E S T M E N T S 3

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Banks: Savings, Thrift & Mortgage Lending (continued)
Premier Financial Corp.		63,510	$	1,083,481
Southern Missouri Bancorp, Inc.		15,250		590,022
Sterling Bancorp, Inc.(a)		33,926		198,128
Washington Federal, Inc.		102,537		2,626,998
Waterstone Financial, Inc.		33,221		363,770
WSFS Financial Corp.		94,352		3,443,848
				19,185,077
Beverage: Soft Drinks — 0.3%
Coca-Cola Consolidated, Inc.		8,495		5,405,538
Duckhorn Portfolio, Inc., Series WWW(a)		79,352		814,152
National Beverage Corp.(a)		42,171		1,982,881
Primo Water Corp.		278,419		3,842,182
Zevia PBC, Class A(a)(b)		41,042		91,113
				12,135,866
Biotechnology — 6.6%
2seventy bio, Inc.(a)		86,765		340,119
4D Molecular Therapeutics, Inc.(a)		69,687		887,116
89bio, Inc.(a)(b)		109,900		1,696,856
Aadi Bioscience, Inc.(a)		28,957		146,663
ACELYRIN, Inc.(a)		59,206		602,125
Acrivon Therapeutics, Inc.(a)		16,624		158,925
Actinium Pharmaceuticals, Inc.(a)		50,156		296,924
Adicet Bio, Inc.(a)(b)		49,237		67,455
ADMA Biologics, Inc.(a)		374,515		1,340,764
Aerovate Therapeutics, Inc.(a)		19,839		269,215
Agenus, Inc.(a)		631,711		713,833
Agios Pharmaceuticals, Inc.(a)		98,755		2,444,186
Akero Therapeutics, Inc.(a)		91,259		4,615,880
Aldeyra Therapeutics, Inc.(a)		86,250		576,150
Alector, Inc.(a)(b)		112,847		731,249
Allakos, Inc.(a)		113,371		257,352
Allogene Therapeutics, Inc., Series 2021(a)(b)		146,910		465,705
Allovir, Inc., Series 2021(a)(b)		89,023		191,399
Alpine Immune Sciences, Inc.(a)(b)		58,427		668,989
Altimmune, Inc.(a)		83,966		218,312
ALX Oncology Holdings, Inc.(a)		38,942		186,922
Amicus Therapeutics, Inc.(a)		498,560		6,062,490
Amylyx Pharmaceuticals, Inc.(a)		90,299		1,653,375
AnaptysBio, Inc.(a)(b)		32,638		586,178
Anavex Life Sciences Corp.(a)(b)		126,767		830,324
ANI Pharmaceuticals, Inc.(a)		25,820		1,499,109
Annexon, Inc.(a)(b)		74,981		176,955
Apogee Therapeutics, Inc.		34,668		738,428
Arbutus Biopharma Corp.(a)		214,824		436,093
Arcellx, Inc.(a)		67,477		2,421,075
Arcturus Therapeutics Holdings, Inc.(a)		41,456		1,059,201
Arcus Biosciences, Inc.(a)		93,794		1,683,602
Arcutis Biotherapeutics, Inc.(a)		91,763		487,262
Ardelyx, Inc.(a)		378,679		1,545,010
ARS Pharmaceuticals, Inc.(a)(b)		40,466		152,961
Arvinas, Inc.(a)		87,302		1,714,611
Astria Therapeutics, Inc.(a)		47,855		356,998
Atara Biotherapeutics, Inc.(a)(b)		187,044		276,825
Aura Biosciences, Inc.(a)		47,602		426,990
Aurinia Pharmaceuticals, Inc.(a)		240,758		1,870,690
Avid Bioservices, Inc.(a)		110,334		1,041,553
Avidity Biosciences, Inc.(a)(b)		125,683		801,858
Avita Medical, Inc.(a)		45,770		668,700
Beam Therapeutics, Inc.(a)(b)		124,009		2,982,416
BioAtla, Inc.(a)		73,127		124,316
BioCryst Pharmaceuticals, Inc.(a)(b)		336,993		2,385,910

Security	Shares		Value
Biotechnology (continued)
Biohaven Ltd.(a)		103,606	$	2,694,792
Biomea Fusion, Inc.(a)(b)		34,283		471,734
BioVie, Inc.(a)(b)		7,448		25,398
Bioxcel Therapeutics, Inc.(a)(b)		33,014		83,525
Bluebird Bio, Inc.(a)(b)		190,469		579,026
Blueprint Medicines Corp.(a)		108,120		5,429,786
Bridgebio Pharma, Inc.(a)(b)		203,612		5,369,248
Cabaletta Bio, Inc.(a)		61,224		931,829
Caribou Biosciences, Inc.(a)		135,148		646,007
Carisma Therapeutics, Inc.(b)		45,121		190,862
Castle Biosciences, Inc.(a)		44,198		746,504
Catalyst Pharmaceuticals, Inc.(a)		178,552		2,087,273
Celcuity, Inc.(a)(b)		32,357		295,743
Celldex Therapeutics, Inc.(a)		82,602		2,273,207
Century Therapeutics, Inc.(a)		47,754		95,508
Cerevel Therapeutics Holdings, Inc.(a)(b)		110,017		2,401,671
Codexis, Inc.(a)		119,691		226,216
Cogent Biosciences, Inc.(a)		144,187		1,405,823
Coherus Biosciences, Inc.(a)		179,604		671,719
Collegium Pharmaceutical, Inc.(a)		61,636		1,377,565
Compass Therapeutics, Inc.(a)(b)		151,873		299,190
Crinetics Pharmaceuticals, Inc.(a)(b)		114,884		3,416,650
Cue Biopharma, Inc.(a)(b)		65,421		150,468
Cullinan Oncology, Inc.(a)		41,579		376,290
Cymabay Therapeutics, Inc.(a)(b)		174,391		2,600,170
Cytokinetics, Inc.(a)		165,590		4,878,281
Day One Biopharmaceuticals, Inc., Series B(a)(b)		111,387		1,366,718
Deciphera Pharmaceuticals, Inc., Series B(a)		93,125		1,184,550
Denali Therapeutics, Inc.(a)		210,048		4,333,290
Design Therapeutics, Inc.(a)		56,353		132,993
Disc Medicine, Inc.(a)		15,823		743,365
Douglas Elliman, Inc.		138,611		313,261
Dynavax Technologies Corp.(a)		230,439		3,403,584
Dyne Therapeutics, Inc.(a)(b)		77,710		696,282
Editas Medicine, Inc.(a)		146,251		1,140,758
Emergent BioSolutions, Inc.(a)(b)		86,397		293,750
Entrada Therapeutics, Inc.(a)		38,111		602,154
EQRx, Inc.(a)		567,298		1,259,402
Erasca, Inc.(a)		141,256		278,274
EyePoint Pharmaceuticals, Inc.(a)		44,567		356,090
Fate Therapeutics, Inc.(a)		149,766		317,504
Fennec Pharmaceuticals, Inc.(a)		30,169		226,569
FibroGen, Inc.(a)(b)		156,758		135,266
Foghorn Therapeutics, Inc.(a)(b)		36,217		181,085
Genelux Corp.(a)(b)		32,989		807,901
Generation Bio Co.(a)(b)		79,184		300,107
Geron Corp.(a)(b)		885,398		1,877,044
Graphite Bio, Inc.(a)(b)		57,691		143,074
Gritstone bio, Inc.(a)(b)		147,244		253,260
Guardant Health, Inc.(a)		200,837		5,952,809
Halozyme Therapeutics, Inc.(a)		230,881		8,819,654
Harvard Bioscience, Inc.(a)		74,015		318,265
Heron Therapeutics, Inc.(a)(b)		185,313		190,872
HilleVax, Inc.(a)		36,841		495,511
Humacyte, Inc.(a)		114,329		334,984
Icosavax, Inc.(a)		47,737		369,962
Ideaya Biosciences, Inc.(a)		96,531		2,604,406
IGM Biosciences, Inc.(a)		21,795		181,988
Immuneering Corp., Class A(a)		37,971		291,617
ImmunityBio, Inc.(a)(b)		216,869		366,509
ImmunoGen, Inc.(a)		426,154		6,763,064
Immunovant, Inc.(a)		95,928		3,682,676

4

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Biotechnology (continued)
Inhibrx, Inc.(a)		61,060	$	1,120,451
Inozyme Pharma, Inc.(a)		56,742		238,316
Insmed, Inc.(a)(b)		234,366		5,917,741
Intellia Therapeutics, Inc.(a)		156,858		4,959,850
Intercept Pharmaceuticals, Inc.(a)		72,120		1,337,105
Invitae Corp.(a)(b)		460,074		278,437
Iovance Biotherapeutics, Inc.(a)(b)		407,790		1,855,444
iTeos Therapeutics, Inc.(a)		44,079		482,665
Janux Therapeutics, Inc.(a)		29,586		298,227
KalVista Pharmaceuticals, Inc.(a)(b)		42,833		412,482
Karyopharm Therapeutics, Inc.(a)		196,221		262,936
Keros Therapeutics, Inc.(a)		40,017		1,275,742
Kezar Life Sciences, Inc.(a)(b)		122,594		145,887
Kiniksa Pharmaceuticals Ltd., Class A(a)		56,170		975,673
Kodiak Sciences, Inc.(a)(b)		58,852		105,934
Krystal Biotech, Inc.(a)(b)		38,428		4,457,648
Kura Oncology, Inc.(a)		125,453		1,144,131
Kymera Therapeutics, Inc.(a)		67,551		938,959
Larimar Therapeutics, Inc.(a)		49,990		197,461
Lexicon Pharmaceuticals, Inc.(a)(b)		159,542		173,901
Ligand Pharmaceuticals, Inc.(a)		29,641		1,776,089
Lineage Cell Therapeutics, Inc.(a)		228,835		270,025
Lyell Immunopharma, Inc.(a)(b)		310,130		455,891
MacroGenics, Inc.(a)		111,166		518,034
Madrigal Pharmaceuticals, Inc.(a)(b)		24,211		3,535,774
MannKind Corp.(a)(b)		456,610		1,885,799
Marinus Pharmaceuticals, Inc.(a)(b)		91,009		732,622
MaxCyte, Inc.(a)(b)		160,480		500,698
MeiraGTx Holdings PLC(a)		57,379		281,731
Merrimack Pharmaceuticals, Inc.(a)(b)		17,560		216,515
Mersana Therapeutics, Inc.(a)		175,466		222,842
MiMedx Group, Inc.(a)		205,183		1,495,784
Mineralys Therapeutics, Inc.(a)		24,073		228,934
Mirum Pharmaceuticals, Inc.(a)(b)		43,998		1,390,337
Monte Rosa Therapeutics, Inc.(a)		55,657		266,597
Morphic Holding, Inc.(a)(b)		61,309		1,404,589
Myriad Genetics, Inc.(a)		143,632		2,303,857
Nautilus Biotechnology, Inc.(a)		86,024		271,836
NGM Biopharmaceuticals, Inc.(a)		70,260		75,178
Nkarta, Inc.(a)(b)		53,053		73,744
Novavax, Inc.(a)(b)		154,801		1,120,759
Nurix Therapeutics, Inc.(a)		84,632		665,208
Nuvalent, Inc., Class A(a)		42,640		1,960,161
Nuvectis Pharma, Inc.		14,205		183,102
Ocean Biomedical, Inc.(a)(b)		12,815		49,979
Olema Pharmaceuticals, Inc.(a)		48,721		601,704
Omega Therapeutics, Inc.(a)		39,455		84,828
Omeros Corp.(a)(b)		103,949		303,531
OPKO Health, Inc.(a)		717,130		1,147,408
ORIC Pharmaceuticals, Inc.(a)		72,662		439,605
Outlook Therapeutics, Inc.(a)(b)		261,763		57,850
Ovid therapeutics, Inc.(a)		108,595		417,005
Pacific Biosciences of California, Inc.(a)(b)		448,167		3,742,194
PDS Biotechnology Corp.(a)(b)		47,347		239,102
PepGen, Inc.(a)		19,300		98,044
Phathom Pharmaceuticals, Inc.(a)		56,253		583,344
PMV Pharmaceuticals, Inc.(a)(b)		67,477		414,309
Point Biopharma Global, Inc.(a)(b)		160,871		1,073,010
Poseida Therapeutics, Inc.(a)		128,294		305,340
Precigen, Inc.(a)(b)		231,899		329,297
Prelude Therapeutics, Inc.(a)		26,682		82,447
Prime Medicine, Inc.(a)(b)		72,268		689,437

Security	Shares		Value
Biotechnology (continued)
ProKidney Corp., Class A(a)		83,450	$	382,201
Protagonist Therapeutics, Inc.(a)		101,547		1,693,804
Protalix BioTherapeutics, Inc.		116,801		193,890
Prothena Corp. PLC(a)		73,706		3,556,314
PTC Therapeutics, Inc.(a)		125,943		2,822,383
Pulse Biosciences, Inc.(a)(b)		25,430		102,483
Quantum-Si, Inc., Class A(a)		176,943		293,725
RadNet, Inc.(a)		105,867		2,984,391
Rallybio Corp.(a)(b)		51,825		174,650
RAPT Therapeutics, Inc.(a)		52,511		872,733
Recursion Pharmaceuticals, Inc., Class A(a)		242,640		1,856,196
REGENXBIO, Inc.(a)		72,235		1,188,988
Relay Therapeutics, Inc.(a)		160,511		1,349,898
Reneo Pharmaceuticals, Inc.(a)		22,003		167,553
Replimune Group, Inc.(a)		73,857		1,263,693
REVOLUTION Medicines, Inc.(a)		180,307		4,990,898
Rhythm Pharmaceuticals, Inc.(a)(b)		91,340		2,093,969
Rigel Pharmaceuticals, Inc.(a)		305,297		329,721
Rocket Pharmaceuticals, Inc.(a)(b)		99,747		2,043,816
Sage Therapeutics, Inc.(a)		93,994		1,934,397
Sagimet Biosciences, Inc., Series A		9,109		80,159
Sana Biotechnology, Inc.(a)(b)		165,804		641,661
Sangamo Therapeutics, Inc.(a)		254,025		152,364
Savara, Inc.(a)		163,794		619,141
Scholar Rock Holding Corp.(a)		79,056		561,298
Selecta Biosciences, Inc.(a)(b)		225,801		239,349
Seres Therapeutics, Inc.(a)(b)		168,991		402,199
SomaLogic, Inc., Class A(a)		262,732		627,929
SpringWorks Therapeutics, Inc.(a)		103,598		2,395,186
Stoke Therapeutics, Inc.(a)		47,895		188,706
Summit Therapeutics, Inc.(a)(b)		197,937		370,142
Sutro Biopharma, Inc.(a)		103,661		359,704
Tango Therapeutics, Inc.(a)(b)		79,367		893,672
Tenaya Therapeutics, Inc.(a)(b)		79,481		202,677
Travere Therapeutics, Inc.(a)		129,514		1,157,855
Turnstone Biologics Corp.		11,216		44,191
Twist Bioscience Corp.(a)(b)		101,198		2,050,271
Tyra Biosciences, Inc.(a)		24,587		338,563
UroGen Pharma Ltd.(a)		35,332		495,001
Vanda Pharmaceuticals, Inc.(a)		104,632		452,010
Vaxcyte, Inc.(a)		166,773		8,502,088
Vaxxinity, Inc., Class A(a)(b)		79,461		108,862
Vera Therapeutics, Inc., Class A(a)		60,113		824,149
Veracyte, Inc.(a)		129,428		2,890,127
Vericel Corp.(a)(b)		84,675		2,838,306
Verrica Pharmaceuticals, Inc.(a)(b)		34,321		133,337
Verve Therapeutics, Inc.(a)(b)		90,193		1,195,959
Vigil Neuroscience, Inc.(a)(b)		25,497		137,429
Viking Therapeutics, Inc.(a)(b)		170,946		1,892,372
Vir Biotechnology, Inc.(a)		148,894		1,395,137
Viridian Therapeutics, Inc.(a)		75,027		1,150,914
Vor BioPharma, Inc.(a)		61,309		129,975
X4 Pharmaceuticals, Inc.(a)		212,440		231,560
Xencor, Inc.(a)		103,120		2,077,868
XOMA Corp.(a)		13,737		193,554
Y-mAbs Therapeutics, Inc.(a)(b)		63,965		348,609
Zentalis Pharmaceuticals, Inc.(a)(b)		103,539		2,076,992
Zevra Therapeutics, Inc.(a)		58,125		280,163
Zura Bio Ltd., Class A(b)		20,112		132,739
Zymeworks, Inc.(a)(b)		96,478		611,671
				268,095,274

S E R I E S   S C H E D U L E   O F   I N V E S T M E N T S 5

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Building Materials — 1.0%
Aspen Aerogels, Inc.(a)(b)		91,052	$	783,047
BlueLinx Holdings, Inc.(a)		15,556		1,276,992
Gibraltar Industries, Inc.(a)		54,377		3,670,991
Griffon Corp.		78,055		3,096,442
Masonite International Corp.(a)		39,530		3,684,987
Masterbrand, Inc.(a)		230,754		2,803,661
Patrick Industries, Inc.		37,987		2,851,304
PGT Innovations, Inc.(a)		100,921		2,800,558
Quanex Building Products Corp.		58,721		1,654,171
Simpson Manufacturing Co., Inc.		76,372		11,441,289
Summit Materials, Inc., Class A(a)(b)		212,544		6,618,620
				40,682,062
Building Products — 0.0%
Janus International Group, Inc.(a)		151,068		1,616,428
Building: Climate Control — 0.4%
AAON, Inc.		120,539		6,855,053
Comfort Systems USA, Inc.		62,984		10,733,103
				17,588,156
Building: Roofing, Wallboard & Plumbing(a) — 0.2%
Beacon Roofing Supply, Inc.		95,989		7,407,471
JELD-WEN Holding, Inc.		151,448		2,023,345
				9,430,816
Cable Television Services(a) — 0.1%
AMC Networks, Inc., Class A		55,020		648,136
Liberty Latin America Ltd., Class A		64,571		526,899
Liberty Latin America Ltd., Class C(b)		255,886		2,088,030
WideOpenWest, Inc.(b)		90,232		690,275
				3,953,340
Capital Markets — 0.2%
Bakkt Holdings, Inc., Class A(a)(b)		109,528		128,148
BGC Group, Inc., Series L, Class A		559,056		2,951,816
Forge Global Holdings, Inc.(a)		198,874		403,714
P10, Inc., Class A		76,494		891,155
Patria Investments Ltd., Class A(b)		96,719		1,410,163
Perella Weinberg Partners, Class A		74,795		761,413
Victory Capital Holdings, Inc., Class A		48,496		1,616,857
				8,163,266
Casinos & Gambling — 0.5%
Accel Entertainment, Inc., Class A(a)		95,900		1,050,105
Century Casinos, Inc.(a)		46,991		241,064
Full House Resorts, Inc.(a)		57,565		245,803
Inspired Entertainment, Inc.(a)		37,289		445,976
International Game Technology PLC		193,194		5,857,642
Light & Wonder, Inc., Class A(a)(b)		162,491		11,590,483
Monarch Casino & Resort, Inc.		23,961		1,487,978
				20,919,051
Cement — 0.0%
Concrete Pumping Holdings, Inc.(a)		45,872		393,582
Chemicals — 0.0%
Perimeter Solutions SA(a)(b)		275,888		1,252,532
Chemicals: Diversified — 0.8%
AdvanSix, Inc.		47,117		1,464,396
American Vanguard Corp., Series 2019		48,673		531,996
Avient Corp.		160,899		5,682,953
Cabot Corp.		98,555		6,826,905
Core Molding Technologies, Inc.(a)		13,518		385,128
CSW Industrials, Inc.		27,421		4,805,256

Security	Shares		Value
Chemicals: Diversified (continued)
Danimer Scientific, Inc., Class A(a)(b)		156,759	$	324,491
Ecovyst, Inc.(a)		169,371		1,666,611
Hawkins, Inc.		34,429		2,026,147
Ingevity Corp.(a)		65,036		3,096,364
LSB Industries, Inc.(a)(b)		97,773		1,000,218
Origin Materials, Inc., Class A(a)(b)		208,846		267,323
PureCycle Technologies, Inc.(a)(b)		206,584		1,158,936
Rayonier Advanced Materials, Inc.(a)		114,003		403,570
Sensient Technologies Corp.		74,892		4,379,684
Valhi, Inc.		3,801		50,401
				34,070,379
Chemicals: Specialty — 0.7%
Balchem Corp.		56,914		7,059,613
FutureFuel Corp.		44,490		318,993
Innospec, Inc.		44,388		4,536,454
Livent Corp.(a)(b)		321,164		5,912,629
Orion SA		99,780		2,123,318
Quaker Chemical Corp.		24,709		3,953,440
Stepan Co.		37,903		2,841,588
Trinseo PLC		64,806		529,465
Tronox Holdings PLC, Class A		208,285		2,799,350
				30,074,850
Coal — 0.6%
Arch Resources, Inc., Class A		32,557		5,556,178
CONSOL Energy, Inc.		59,464		6,238,368
Hallador Energy Co.(a)		40,665		586,389
Peabody Energy Corp.		221,705		5,762,113
Warrior Met Coal, Inc.		92,041		4,701,454
				22,844,502
Commercial Banks — 0.0%
Dime Community Bancshares, Inc.		62,211		1,241,732
HomeTrust Bancshares, Inc.		28,303		613,326
				1,855,058
Commercial Finance & Mortgage Companies — 0.3%
Federal Agricultural Mortgage Corp., Class C		16,237		2,505,369
Pathward Financial, Inc.		44,169		2,035,749
PennyMac Financial Services, Inc.		45,391		3,023,041
RE/MAX Holdings, Inc., Class A		32,749		423,772
Velocity Financial, Inc.(a)		14,028		158,516
Walker & Dunlop, Inc., Series M		56,598		4,201,836
				12,348,283
Commercial Services & Supplies — 0.2%
ACV Auctions, Inc., Class A(a)		226,043		3,431,333
Aris Water Solution, Inc., Class A		51,457		513,541
Aurora Innovation, Inc., Class A(a)		592,194		1,391,656
Information Services Group, Inc.		62,665		274,472
LanzaTech Global, Inc.(a)(b)		35,658		166,523
Li-Cycle Holdings Corp.(a)(b)		245,362		871,035
National Research Corp.		25,608		1,136,227
Performant Financial Corp.(a)(b)		107,296		242,489
				8,027,276
Commercial Services: Rental & Leasing — 1.0%
FTAI Aviation Ltd.		177,106		6,296,118
GATX Corp.		63,182		6,876,097
GMS, Inc.(a)		72,999		4,669,746
H&E Equipment Services, Inc.		57,202		2,470,554
Herc Holdings, Inc.		50,296		5,982,206
McGrath RentCorp		43,933		4,403,844
NOW, Inc.(a)		189,460		2,248,890

6

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Commercial Services: Rental & Leasing (continued)
Rush Enterprises, Inc., Class B		16,464	$	745,655
Triton International Ltd.(a)(c)		94,439		7,769,018
Willis Lease Finance Corp.(a)		5,319		224,994
				41,687,122
Commercial Vehicles & Parts — 0.4%
Blue Bird Corp.(a)		31,672		676,197
Commercial Vehicle Group, Inc.(a)		59,424		461,130
Cooper-Standard Holdings, Inc.(a)		28,605		383,879
Miller Industries, Inc.		19,830		777,534
Modine Manufacturing Co.(a)		91,550		4,188,413
REV Group, Inc.		56,307		900,912
Rush Enterprises, Inc., Class A		110,787		4,523,433
Shyft Group, Inc.		61,233		916,658
Wabash National Corp.		84,407		1,782,676
				14,610,832
Communications Equipment — 0.0%
CommScope Holding Co., Inc.(a)		368,646		1,238,651
Communications Technology — 0.7%
908 Devices, Inc.(a)		40,135		267,299
ADTRAN Holdings, Inc.		138,781		1,142,168
Anterix, Inc.(a)(b)		22,886		718,163
Aviat Networks, Inc.(a)		19,750		616,200
Bandwidth, Inc., Class A(a)		40,212		453,189
Bel Fuse, Inc., Class B		18,791		896,707
Calix, Inc.(a)(b)		104,911		4,809,120
Comtech Telecommunications Corp.		49,342		431,743
Digi International, Inc.(a)		62,519		1,688,013
DZS, Inc.(a)		36,771		77,219
EchoStar Corp., Class A(a)		60,687		1,016,507
Extreme Networks, Inc.(a)		224,488		5,434,854
Harmonic, Inc.(a)		195,891		1,886,430
Infinera Corp.(a)(b)		354,779		1,482,976
InterDigital, Inc.		47,615		3,820,628
KVH Industries, Inc.(a)(b)		32,730		166,923
NETGEAR, Inc.(a)		52,479		660,711
Ooma, Inc.(a)		42,780		556,568
Ribbon Communications, Inc.(a)(b)		152,130		407,708
				26,533,126
Computer Services Software & Systems — 5.3%
A10 Networks, Inc.		125,640		1,888,369
ACI Worldwide, Inc.(a)		192,989		4,353,832
Adeia, Inc.		190,332		2,032,746
Alarm.com Holdings, Inc.(a)		85,236		5,211,329
Alkami Technology, Inc.(a)(b)		70,266		1,280,247
Altair Engineering, Inc., Class A(a)(b)		95,576		5,979,235
American Software, Inc., Class A		57,491		658,847
Appfolio, Inc., Class A(a)		34,165		6,239,554
Appian Corp., Series BB, Class A(a)(b)		72,988		3,328,983
Applied Digital Corp.(a)(b)		117,842		735,334
Asana, Inc., Class A(a)		141,350		2,588,118
Asure Software, Inc.(a)		33,018		312,350
Avantax, Inc.(a)		68,297		1,747,037
Avid Technology, Inc.(a)		60,518		1,626,119
BigCommerce Holdings, Inc., Series 1(a)(b)		119,521		1,179,672
Blackbaud, Inc.(a)(b)		77,485		5,448,745
Blackline, Inc.(a)		100,283		5,562,698
Box, Inc., Class A(a)		250,814		6,072,207
Brightcove, Inc.(a)		73,596		242,131
Cargurus, Inc., Class A(a)		173,998		3,048,445
Cerence, Inc.(a)		71,728		1,461,099

Security	Shares		Value
Computer Services Software & Systems (continued)
Cleanspark, Inc.(a)		196,609	$	749,080
CommVault Systems, Inc., Series 20-A(a)		78,400		5,300,624
CoreCard Corp.(a)		12,635		252,700
CSG Systems International, Inc.		56,251		2,875,551
Digimarc Corp.(a)(b)		25,279		821,315
Digital Turbine, Inc.(a)		170,245		1,029,982
DigitalOcean Holdings, Inc.(a)(b)		112,790		2,710,344
Domo, Inc., Class B(a)		57,170		560,838
E2open Parent Holdings, Inc., Class A(a)		302,133		1,371,684
Ebix, Inc.		49,045		484,565
Envestnet, Inc.(a)		80,710		3,553,661
ePlus, Inc.(a)		47,281		3,003,289
Eventbrite, Inc., Class A(a)(b)		137,538		1,356,125
Everbridge, Inc.(a)		72,370		1,622,535
EverQuote, Inc., Class A(a)(b)		40,042		289,504
Evolent Health, Inc., Class A(a)		195,873		5,333,622
fuboTV, Inc.(a)		503,715		1,344,919
Grid Dynamics Holdings, Inc., Class A(a)		98,623		1,201,228
Grindr, Inc.(a)(b)		74,875		430,531
LivePerson, Inc.(a)		132,237		514,402
LiveRamp Holdings, Inc.(a)		117,047		3,375,635
Magnite, Inc.(a)		238,167		1,795,779
Marathon Digital Holdings, Inc.(a)(b)		304,314		2,586,669
MicroStrategy, Inc., Class A(a)(b)		19,662		6,454,641
Mitek Systems, Inc.(a)		76,151		816,339
Multiplan Corp., Class A(a)		697,304		1,171,471
NetScout Systems, Inc.(a)		121,337		3,399,863
Nextdoor Holdings, Inc., Class A(a)		250,069		455,126
ON24, Inc.		56,110		355,176
OneSpan, Inc.(a)		71,268		766,131
PagerDuty, Inc.(a)(b)		157,846		3,549,957
PAR Technology Corp.(a)(b)		47,389		1,826,372
PDF Solutions, Inc.(a)		54,482		1,765,217
Perficient, Inc.(a)		61,059		3,532,874
Progress Software Corp.		77,431		4,071,322
PROS Holdings, Inc.(a)(b)		79,513		2,752,740
Q2 Holdings, Inc.(a)		101,272		3,268,047
Rackspace Technology, Inc.(a)		105,363		247,603
Rapid7, Inc.(a)		106,734		4,886,282
Red Violet, Inc.(a)		18,960		379,390
Rimini Street, Inc.(a)		84,741		186,430
Riot Platforms, Inc.(a)(b)		303,429		2,830,993
Sapiens International Corp. NV		54,660		1,553,984
Schrodinger, Inc.(a)		96,894		2,739,193
Shutterstock, Inc.		43,879		1,669,596
Simulations Plus, Inc.		28,199		1,175,898
SoundThinking, Inc.(a)(b)		16,906		302,617
Sprout Social, Inc., Class A(a)		84,986		4,239,102
SPS Commerce, Inc.(a)		65,298		11,140,492
System1, Inc., Class A(a)		71,276		86,244
TechTarget, Inc.(a)		46,386		1,408,279
Tenable Holdings, Inc.(a)(b)		203,135		9,100,448
Tucows, Inc., Class A(a)		17,444		356,032
Unisys Corp.(a)		115,907		399,879
Upwork, Inc.(a)		220,117		2,500,529
Varonis Systems, Inc.(a)		193,396		5,906,314
Verint Systems, Inc.(a)		111,105		2,554,304
Veritone, Inc.(a)(b)		47,390		122,266
Verra Mobility Corp., Class A(a)(b)		248,358		4,644,295
Viant Technology, Inc., Class A(a)		28,084		157,270
Workiva, Inc., Class A(a)		87,005		8,817,087

S E R I E S   S C H E D U L E   O F   I N V E S T M E N T S 7

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Computer Services Software & Systems (continued)
Yelp, Inc.(a)		119,773	$	4,981,359
Yext, Inc.(a)		190,370		1,205,042
Zuora, Inc., Class A(a)		230,773		1,901,569
				213,239,452
Computer Technology — 1.1%
3D Systems Corp.(a)		226,805		1,113,612
Cantaloupe, Inc.(a)		104,368		652,300
Corsair Gaming, Inc.(a)		65,715		954,839
Immersion Corp.		57,785		381,959
Impinj, Inc.(a)		40,893		2,250,342
Insight Enterprises, Inc.(a)		51,076		7,431,558
PC Connection, Inc.		20,362		1,086,924
Super Micro Computer, Inc.(a)		82,519		22,628,360
Synaptics, Inc.(a)		70,221		6,280,566
				42,780,460
Construction — 0.5%
Bowman Consulting Group Ltd.(a)		18,009		504,792
Construction Partners, Inc., Class A(a)(b)		71,478		2,613,236
Granite Construction, Inc.		78,472		2,983,505
Great Lakes Dredge & Dock Corp.(a)		117,484		936,348
INNOVATE Corp.(a)		95,742		155,102
Knife River Corp.(a)		100,673		4,915,863
Limbach Holdings, Inc.(a)		16,606		526,908
Primoris Services Corp.		94,461		3,091,709
Southland Holdings, Inc.(a)(b)		4,576		27,776
Sterling Infrastructure, Inc.(a)		53,275		3,914,647
Tutor Perini Corp.(a)		77,971		610,513
				20,280,399
Consumer Electronics(a) — 0.1%
Sonos, Inc.		225,986		2,917,479
VOXX International Corp., Class A(b)		22,647		180,723
Vuzix Corp.(b)		103,757		376,638
				3,474,840
Consumer Finance(a) — 0.1%
Consumer Portfolio Services, Inc.		13,308		120,704
NerdWallet, Inc., Class A(b)		59,907		532,573
OppFi, Inc., Class A		20,875		52,605
Upstart Holdings, Inc.(b)		128,202		3,658,885
				4,364,767
Consumer Lending — 0.4%
Encore Capital Group, Inc.(a)		41,340		1,974,398
Enova International, Inc.(a)		54,111		2,752,627
LendingTree, Inc.(a)		18,026		279,403
Marcus & Millichap, Inc.		42,204		1,238,265
Navient Corp.		158,303		2,725,978
Nelnet, Inc., Class A		25,898		2,313,209
PRA Group, Inc.(a)		68,707		1,319,862
PROG Holdings, Inc.(a)		82,379		2,735,807
Regional Management Corp.		13,515		374,095
World Acceptance Corp.(a)		7,233		919,025
				16,632,669
Consumer Services: Miscellaneous — 0.4%
Cars.com, Inc.(a)		118,349		1,995,364
Chuy’s Holdings, Inc.(a)		32,121		1,142,865
FirstCash Holdings, Inc.		67,030		6,728,471
OPENLANE, Inc.(a)		192,040		2,865,237

Security	Shares		Value
Consumer Services: Miscellaneous (continued)
Udemy, Inc.(a)		152,573	$	1,449,444
WW International, Inc.(a)		97,501		1,079,336
				15,260,717
Containers & Packaging — 0.4%
Greif, Inc., Class A		43,275		2,891,203
Greif, Inc., Class B		9,493		631,854
Myers Industries, Inc.		65,025		1,165,898
O-I Glass, Inc.(a)		276,407		4,624,289
Pactiv Evergreen, Inc.		72,137		586,474
Ranpak Holdings Corp., Class A(a)		75,986		413,364
UFP Technologies, Inc.(a)		12,609		2,035,723
Veritiv Corp.		23,314		3,937,735
				16,286,540
Cosmetics — 0.4%
elf Beauty, Inc.(a)		94,934		10,426,601
Inter Parfums, Inc.		32,656		4,387,007
				14,813,608
Diversified Consumer Services(a) — 0.4%
Duolingo, Inc., Class A		51,048		8,467,332
Frontdoor, Inc.		146,406		4,478,559
Lincoln Educational Services Corp.		41,324		349,188
Nerdy, Inc., Class A		104,266		385,784
Rover Group, Inc., Class A		165,164		1,033,927
				14,714,790
Diversified Financial Services — 0.6%
Alerus Financial Corp.		33,280		605,030
Cannae Holdings, Inc.(a)		127,315		2,373,152
Compass Diversified Holdings, Series 20-A		112,374		2,109,260
European Wax Center, Inc., Class A(a)		60,715		983,583
Jackson Financial, Inc., Class A		138,044		5,276,042
MBIA, Inc.(a)		87,576		631,423
MidWestOne Financial Group, Inc.		26,041		529,414
Moelis & Co., Class A		112,337		5,069,769
Piper Sandler Cos		30,866		4,485,138
SWK Holdings Corp.(a)(b)		5,499		86,609
Tiptree, Inc.		42,682		715,350
				22,864,770
Diversified Manufacturing Operations — 0.6%
Barnes Group, Inc.		87,142		2,960,214
Custom Truck One Source, Inc.(a)		100,889		625,512
Enerpac Tool Group Corp., Class A		100,279		2,650,374
Enviri Corp.(a)		140,361		1,013,407
Federal Signal Corp.		106,630		6,369,010
Luxfer Holdings PLC		49,826		650,229
OSI Systems, Inc.(a)		28,205		3,329,318
PowerSchool Holdings, Inc., Class A(a)		99,702		2,259,247
Standex International Corp.		20,986		3,057,450
TriMas Corp.		73,810		1,827,536
				24,742,297
Diversified Materials & Processing — 0.5%
Belden, Inc.		75,635		7,302,559
Encore Wire Corp.		28,498		5,199,745
Insteel Industries, Inc.		33,340		1,082,216
Koppers Holdings, Inc.		35,876		1,418,896
NL Industries, Inc.		14,377		68,291
Tredegar Corp.		49,049		265,355
Uranium Energy Corp.(a)		654,405		3,370,186
				18,707,248

8

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Diversified Media — 0.0%
EW Scripps Co., Class A(a)(b)		105,940	$	580,551
Diversified Retail — 0.3%
Big Lots, Inc., Series L(b)		49,137		251,090
ContextLogic, Inc., Class A(a)(b)		38,569		170,089
Dillard’s, Inc., Class A		6,187		2,046,722
Duluth Holdings, Inc., Class B(a)(b)		21,472		129,047
Global Industrial Co.		23,664		792,744
Overstock.com, Inc.(a)		80,232		1,269,270
PriceSmart, Inc.		46,015		3,424,897
Revolve Group, Inc., Class A(a)(b)		73,070		994,483
Savers Value Village, Inc.(a)		46,091		860,519
Stitch Fix, Inc., Class A(a)(b)		156,752		540,794
Winmark Corp.		5,079		1,895,127
				12,374,782
Diversified Telecommunication Services(a) — 0.1%
AST SpaceMobile, Inc., Class A(b)		147,130		559,094
Charge Enterprises, Inc.(b)		252,779		125,682
Lumen Technologies, Inc.		1,792,929		2,545,959
				3,230,735
Drug & Grocery Store Chains — 0.3%
Ingles Markets, Inc., Class A		25,015		1,884,380
PetMed Express, Inc.		35,060		359,365
Sprouts Farmers Market, Inc.(a)		184,303		7,888,168
Village Super Market, Inc., Class A		15,700		355,448
Weis Markets, Inc.		29,314		1,846,782
				12,334,143
Education Services — 0.7%
2U, Inc.(a)		146,129		360,939
Adtalem Global Education, Inc.(a)		77,435		3,318,090
Chegg, Inc.(a)		210,106		1,874,145
Coursera, Inc.(a)		231,602		4,328,641
Franklin Covey Co.(a)		20,677		887,457
Graham Holdings Co., Class B		6,368		3,712,544
HealthStream, Inc.		43,439		937,414
Laureate Education, Inc., Class A		233,082		3,286,456
Perdoceo Education Corp.		119,509		2,043,604
Strategic Education, Inc.		40,260		3,029,565
Stride, Inc.(a)		75,457		3,397,829
Universal Technical Institute, Inc.(a)(b)		60,383		506,009
				27,682,693
Electrical Equipment — 0.3%
374Water, Inc.(a)		97,984		121,500
Amprius Technologies, Inc.(a)(b)		9,428		44,689
Dragonfly Energy Holdings Corp.(a)(b)		50,615		77,947
Energy Vault Holdings, Inc.(a)		177,059		451,500
Enovix Corp.(a)(b)		243,521		3,056,189
Eos Energy Enterprises, Inc., Class A(a)(b)		192,568		414,021
ESS Tech, Inc.(a)(b)		166,053		312,180
Fluence Energy, Inc., Class A(a)(b)		69,996		1,609,208
LSI Industries, Inc.		46,522		738,769
NuScale Power Corp., Class A(a)(b)		96,155		471,159
SES AI Corp., Class A(a)		229,971		522,034
Shoals Technologies Group, Inc., Class A(a)(b)		305,067		5,567,473
SKYX Platforms Corp.(a)		117,137		166,335
				13,553,004
Electronic Components — 0.8%
Array Technologies, Inc.(a)		269,475		5,979,650
Methode Electronics, Inc.		62,880		1,436,808
MicroVision, Inc.(a)(b)		308,279		675,131
Novanta, Inc.(a)(b)		63,703		9,137,558

Security	Shares		Value
Electronic Components (continued)
NVE Corp.		8,481	$	696,629
Rogers Corp.(a)		30,806		4,050,065
Sanmina Corp.(a)		102,572		5,567,608
ScanSource, Inc.(a)		43,982		1,333,095
Stem, Inc.(a)(b)		253,284		1,073,924
TTM Technologies, Inc.(a)		181,979		2,343,890
				32,294,358
Electronic Entertainment(a) — 0.0%
PlayAGS, Inc.		68,215		444,762
Turtle Beach Corp.		27,194		246,785
				691,547
Electronic Equipment, Instruments & Components — 0.2%
Climb Global Solutions, Inc.		7,473		321,414
Daktronics, Inc.(a)(b)		65,733		586,338
Evolv Technologies Holdings, Inc.(a)(b)		200,338		973,643
Iteris, Inc.(a)(b)		75,185		311,266
Lightwave Logic, Inc.(a)(b)		203,930		911,567
Luna Innovations, Inc.(a)(b)		54,869		321,532
Mirion Technologies, Inc., Class A(a)		356,406		2,662,353
Presto Automation, Inc.(a)		9,019		12,897
Richardson Electronics Ltd.		20,057		219,223
SmartRent, Inc., Class A(a)		333,051		869,263
Tingo Group, Inc.(a)		205,487		210,624
				7,400,120
Electronics(a) — 0.3%
Agilysys, Inc.		35,654		2,358,869
Integer Holdings Corp.		59,065		4,632,468
iRobot Corp.		48,775		1,848,572
NEXTracker, Inc., Class A		88,273		3,545,044
nLight, Inc.(b)		80,249		834,589
				13,219,542
Energy Equipment — 1.0%
API Group Corp.(a)		372,196		9,651,042
Arcosa, Inc.		86,315		6,206,049
Bloom Energy Corp., Class A(a)(b)		342,709		4,544,321
Diamond Offshore Drilling, Inc.(a)		180,990		2,656,933
Expro Group Holdings NV(a)		156,888		3,644,508
FuelCell Energy, Inc.(a)(b)		728,343		932,279
Matador Resources Co.		201,607		11,991,585
SunPower Corp.(a)(b)		157,908		974,292
TPI Composites, Inc.(a)(b)		72,806		192,936
				40,793,945
Energy Equipment & Services — 0.8%
Atlas Energy Solutions, Inc., Class A		28,969		643,981
Borr Drilling Ltd.(a)		390,993		2,776,050
Core Laboratories, Inc.		83,397		2,002,362
Forum Energy Technologies, Inc.(a)		17,115		411,102
KLX Energy Services Holdings, Inc.(a)		23,902		283,239
Kodiak Gas Services, Inc.(a)(b)		27,785		496,796
Mammoth Energy Services, Inc.(a)		45,251		209,964
Ranger Energy Services, Inc.		27,445		389,170
SEACOR Marine Holdings, Inc.(a)		42,826		594,425
Seadrill Ltd.(a)		89,896		4,026,442
Valaris Ltd.(a)		109,219		8,189,240
Verde Clean Fuels, Inc., Class A		6,336		23,887
Weatherford International PLC(a)		126,684		11,443,366
				31,490,024
Engineering & Contracting Services — 0.8%
Argan, Inc.		22,537		1,025,884
Dycom Industries, Inc.(a)		50,997		4,538,733

S E R I E S   S C H E D U L E   O F   I N V E S T M E N T S 9

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Engineering & Contracting Services (continued)
Exponent, Inc.		90,107	$	7,713,159
Fluor Corp.(a)		253,757		9,312,882
IES Holdings, Inc.(a)		14,569		959,660
Mistras Group, Inc.(a)		33,891		184,706
MYR Group, Inc.(a)		29,247		3,941,326
NETSTREIT Corp.		119,989		1,869,429
VSE Corp.		22,755		1,147,762
Willdan Group, Inc.(a)		22,688		463,516
				31,157,057
Entertainment — 0.4%
Atlanta Braves Holdings, Inc., Class A		18,086		706,620
Atlanta Braves Holdings, Inc., Class C(a)		81,012		2,894,559
Cinemark Holdings, Inc.(a)		195,544		3,588,232
Golden Entertainment, Inc.		36,002		1,230,548
IMAX Corp.(a)		79,909		1,543,842
Lions Gate Entertainment Corp., Class A(a)		103,643		878,893
Lions Gate Entertainment Corp., Class B(a)		209,626		1,649,757
Loop Media, Inc.(a)		59,121		29,383
Madison Square Garden Entertainment Corp.(a)		76,897		2,530,680
Playstudios, Inc., Class A(a)		158,927		505,388
Reservoir Media, Inc.(a)		38,285		233,538
				15,791,440
Environmental, Maintenance, & Security Service — 0.5%
ABM Industries, Inc.		117,845		4,714,978
BrightView Holdings, Inc.(a)		74,050		573,888
Brink’s Co.		82,111		5,964,543
Healthcare Services Group, Inc.		132,395		1,380,880
IBEX Holdings Ltd.(a)		18,515		286,057
Montrose Environmental Group, Inc., Series R186(a)		49,629		1,452,145
SP Plus Corp.(a)		34,805		1,256,460
UniFirst Corp.		26,696		4,351,715
				19,980,666
Financial Data & Systems — 0.4%
Atlanticus Holdings Corp.(a)(b)		8,447		256,029
Cass Information Systems, Inc.		24,341		906,702
Donnelley Financial Solutions, Inc.(a)		44,010		2,476,883
Everi Holdings, Inc.(a)		150,133		1,984,758
EVERTEC, Inc.		116,258		4,322,473
Green Dot Corp., Class A(a)		71,709		998,906
I3 Verticals, Inc., Class A(a)		40,068		847,038
International Money Express, Inc.(a)		58,594		991,996
LendingClub Corp.(a)		189,298		1,154,718
Priority Technology Holdings, Inc.(a)		27,679		89,680
Repay Holdings Corp., Class A(a)(b)		144,475		1,096,565
Value Line, Inc.(b)		1,578		68,990
				15,194,738
Financial Services — 0.3%
Acacia Research Corp.(a)		65,497		239,064
Blue Foundry Bancorp(a)(b)		41,980		351,373
Enact Holdings, Inc.		53,378		1,453,483
Ispire Technology, Inc.(b)		4,763		43,582
Karat Packaging, Inc.		9,336		215,288
NewtekOne, Inc.(b)		42,892		632,657
Ocwen Financial Corp.(a)(b)		12,172		315,011
Pagseguro Digital Ltd., Class A(a)		353,246		3,041,448
Paysign, Inc.(a)(b)		48,257		94,101
Security National Financial Corp., Class A(a)		21,792		170,849
Turning Point Brands, Inc.		30,459		703,298

Security	Shares		Value
Financial Services (continued)
Universal Corp.		42,892	$	2,024,931
Vector Group Ltd.		258,609		2,751,600
				12,036,685
Food & Staples Retailing — 0.0%
Natural Grocers by Vitamin Cottage, Inc.		17,991		232,264
Food Products — 0.2%
Benson Hill, Inc.(a)(b)		300,534		99,627
Beyond Meat, Inc., Series L(a)(b)		105,425		1,014,189
BRC, Inc., Class A(a)(b)		65,654		235,698
Dole PLC		127,229		1,473,312
Forafric Global PLC		9,653		108,982
Hain Celestial Group, Inc.(a)		159,076		1,649,618
Limoneira Co.		30,545		467,949
SunOpta, Inc.(a)		158,805		535,173
Westrock Coffee Co.(a)		48,362		428,487
				6,013,035
Foods — 1.1%
B&G Foods, Inc.		126,472		1,250,808
Chefs’ Warehouse, Inc.(a)(b)		62,621		1,326,313
HF Foods Group, Inc.(a)		64,885		257,593
Hostess Brands, Inc., Class A(a)		236,306		7,871,353
J & J Snack Foods Corp.		26,795		4,385,002
John B Sanfilippo & Son, Inc.		15,946		1,575,465
Lancaster Colony Corp.		34,755		5,735,618
Medifast, Inc.		19,093		1,429,111
Mission Produce, Inc.(a)(b)		86,938		841,560
Nature’s Sunshine Products, Inc.(a)		22,500		372,825
Seneca Foods Corp., Class A(a)		9,339		502,718
Simply Good Foods Co.(a)		161,514		5,575,463
Sovos Brands, Inc.(a)		90,666		2,044,518
SpartanNash Co.		61,397		1,350,734
TreeHouse Foods, Inc.(a)		91,635		3,993,453
United Natural Foods, Inc.(a)		103,983		1,470,320
Utz Brands, Inc., Class A		128,092		1,720,275
Vita Coco Co., Inc.(a)		50,839		1,323,848
Vital Farms, Inc.(a)		54,302		628,817
				43,655,794
Forest Products — 0.5%
Boise Cascade Co.		70,669		7,281,734
UFP Industries, Inc.		106,867		10,943,181
				18,224,915
Forms & Bulk Printing Services — 0.1%
Deluxe Corp.		77,427		1,462,596
Ennis, Inc.		45,560		966,783
Quad/Graphics, Inc., Class A(a)		53,805		270,639
				2,700,018
Fruit & Grain Processing — 0.1%
MGP Ingredients, Inc.		28,214		2,976,013
Funeral Parlors & Cemeteries — 0.2%
Carriage Services, Inc.		24,227		684,413
Hillenbrand, Inc.		122,885		5,199,264
Matthews International Corp., Class A		52,855		2,056,588
				7,940,265
Gas Pipeline — 0.2%
Equitrans Midstream Corp.		777,168		7,282,064
Kinetik Holdings, Inc., Class A		30,634		1,033,898
NextDecade Corp.(a)		56,692		290,263
				8,606,225

10

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Glass — 0.0%
Apogee Enterprises, Inc.		39,312	$	1,850,809
Gold — 0.1%
Caledonia Mining Corp. PLC		28,639		282,381
Coeur Mining, Inc.(a)(b)		589,026		1,307,638
Novagold Resources, Inc.(a)(b)		430,128		1,651,691
				3,241,710
Health Care Equipment & Services — 0.1%
Embecta Corp.		102,752		1,546,417
Figs, Inc., Class A(a)		227,343		1,341,324
				2,887,741
Health Care Equipment & Supplies — 0.2%
Adaptive Biotechnologies Corp.(a)(b)		201,958		1,100,671
Inogen, Inc.(a)		40,440		211,097
Nano-X Imaging Ltd.(a)(b)		86,733		568,969
OmniAb, Inc.(a)		165,775		860,372
OmniAb, Inc.(c)		18,006		—
Paragon 28, Inc.(a)(b)		78,288		982,514
PROCEPT BioRobotics Corp.(a)		64,173		2,105,516
Vicarious Surgical, Inc., Class A(a)(b)		121,523		71,784
Zimvie, Inc.(a)		44,529		419,018
				6,319,941
Health Care Facilities — 0.7%
Apollo Medical Holdings, Inc.(a)(b)		76,180		2,350,153
Brookdale Senior Living, Inc.(a)(b)		331,513		1,372,464
CVRx, Inc.(a)		19,172		290,839
Ensign Group, Inc.		97,007		9,014,861
Joint Corp.(a)(b)		26,101		234,648
LifeStance Health Group, Inc.(a)(b)		188,698		1,296,355
National HealthCare Corp.		22,212		1,421,124
Pliant Therapeutics, Inc.(a)(b)		100,454		1,741,872
RxSight, Inc.(a)(b)		48,176		1,343,629
Select Medical Holdings Corp.		184,893		4,672,246
Sight Sciences, Inc.(a)		38,565		129,964
U.S. Physical Therapy, Inc.		26,013		2,386,172
				26,254,327
Health Care Management Services(a) — 0.4%
Computer Programs and Systems, Inc.		25,663		409,068
Enhabit, Inc.(b)		89,542		1,007,347
Hims & Hers Health, Inc., Class A		217,341		1,367,075
Option Care Health, Inc.		302,588		9,788,722
Progyny, Inc.		139,698		4,752,526
Quipt Home Medical Corp.		73,634		374,797
				17,699,535
Health Care Providers & Services(a) — 0.0%
23andMe Holding Co., Class A		479,682		468,985
Cano Health, Inc., Class A(b)		413,978		104,985
CareMax, Inc., Class A(b)		130,447		276,548
DocGo, Inc.(b)		138,297		737,123
P3 Health Partners, Inc., Class A(b)		69,896		102,747
				1,690,388
Health Care Services — 1.7%
Accolade, Inc.(a)		120,577		1,275,705
Addus HomeCare Corp.(a)		27,831		2,370,923
Agiliti, Inc.(a)(b)		51,263		332,697
AirSculpt Technologies, Inc.(a)		19,556		133,763
Alignment Healthcare, Inc.(a)		151,313		1,050,112
American Well Corp., Class A(a)		426,505		499,011
AMN Healthcare Services, Inc.(a)		70,750		6,026,485

Security	Shares		Value
Health Care Services (continued)
Aveanna Healthcare Holdings, Inc.(a)		99,315	$	118,185
Butterfly Network, Inc., Class A(a)(b)		260,971		307,946
Cara Therapeutics, Inc.(a)		77,774		130,660
CorVel Corp.(a)		15,509		3,049,845
Cross Country Healthcare, Inc.(a)		61,221		1,517,668
Definitive Healthcare Corp., Class A(a)(b)		82,853		661,995
Health Catalyst, Inc.(a)		99,247		1,004,379
HealthEquity, Inc.(a)(b)		149,515		10,922,071
Inari Medical, Inc.(a)		95,137		6,221,960
ModivCare, Inc.(a)		22,661		714,048
NeoGenomics, Inc.(a)		226,559		2,786,676
NextGen Healthcare, Inc.(a)		97,737		2,319,299
Omnicell, Inc.(a)		79,937		3,600,362
OptimizeRx Corp.(a)		28,072		218,400
Pediatrix Medical Group, Inc.(a)		149,668		1,902,280
Pennant Group, Inc.(a)		50,706		564,358
Phibro Animal Health Corp., Class A		35,009		447,065
Phreesia, Inc.(a)		91,735		1,713,610
Privia Health Group, Inc.(a)(b)		196,826		4,526,998
Ryman Hospitality Properties, Inc.		102,793		8,560,601
Sharecare, Inc., Class A(a)(b)		532,405		500,674
Surgery Partners, Inc.(a)(b)		120,075		3,512,194
Veradigm, Inc., Series 2021(a)		191,893		2,521,474
Viemed Healthcare, Inc.(a)		59,556		400,812
			69,912,256
Home Building — 1.2%
Beazer Homes USA, Inc.(a)		52,420		1,305,782
Century Communities, Inc.		50,614		3,380,003
Hovnanian Enterprises, Inc., Class A(a)		8,562		870,413
Installed Building Products, Inc.		42,171		5,266,736
KB Home		128,856		5,963,456
Legacy Housing Corp.(a)(b)		18,016		349,691
LGI Homes, Inc.(a)		37,034		3,684,513
M/I Homes, Inc.(a)		47,930		4,028,037
MDC Holdings, Inc.		104,460		4,306,886
Meritage Homes Corp.		64,809		7,931,973
Taylor Morrison Home Corp.(a)		187,196		7,976,422
Tile Shop Holdings, Inc.(a)		49,395		271,178
Tri Pointe Homes, Inc.(a)		176,488		4,826,947
				50,162,037
Hotel/Motel — 0.2%
Bally’s Corp.(a)		52,451		687,633
First Watch Restaurant Group, Inc.(a)		39,510		683,128
Krispy Kreme, Inc.		155,741		1,942,090
Marcus Corp.		42,033		651,511
Red Rock Resorts, Inc., Class A		84,695		3,472,495
Xponential Fitness, Inc., Class A(a)		42,890		664,795
				8,101,652
Hotels, Restaurants & Leisure — 0.1%
Bowlero Corp., Class A(a)(b)		54,584		525,098
Global Business Travel Group I(a)(b)		58,993		324,461
Mondee Holdings, Inc., Class A(a)(b)		75,940		271,106
Six Flags Entertainment Corp.(a)		128,509		3,021,247
Super Group SGHC Ltd.		242,622		895,275
				5,037,187
Household Appliances(a) — 0.0%
Landsea Homes Corp.		24,654		221,640

S E R I E S   S C H E D U L E   O F   I N V E S T M E N T S 11

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Household Appliances (continued)
Snap One Holdings Corp.		32,217	$	297,685
Traeger, Inc.(b)		59,759		163,142
				682,467
Household Durables — 0.1%
Cricut, Inc., Class A		86,100		799,869
Dream Finders Homes, Inc., Class A(a)		43,085		957,780
United Homes Group, Inc., Series 16-2, Class A(a)		12,199		68,314
Vizio Holding Corp., Class A(a)		137,689		744,898
Waldencast PLC, Class A(b)		65,898		620,759
				3,191,620
Household Equipment & Products — 0.5%
Central Garden & Pet Co.(a)		17,666		779,777
Central Garden & Pet Co., Class A(a)		70,047		2,808,184
Energizer Holdings, Inc.		127,479		4,084,427
Helen of Troy Ltd.(a)(b)		42,838		4,993,198
Zurn Elkay Water Solutions Corp.		263,282		7,377,162
				20,042,748
Household Furnishings — 0.2%
American Woodmark Corp.(a)		29,170		2,205,544
Ethan Allen Interiors, Inc.		40,630		1,214,837
Hooker Furnishings Corp.		19,177		372,993
La-Z-Boy, Inc.		77,239		2,385,140
Lovesac Co.(a)		25,932		516,565
Purple Innovation, Inc.(b)		91,301		156,125
Sleep Number Corp.(a)		38,005		934,543
				7,785,747
Independent Power Producers & Energy Traders(a) — 0.0%
Altus Power, Inc., Class A		116,386		611,027
Montauk Renewables, Inc.		118,547		1,079,963
				1,690,990
Industrial Conglomerates — 0.0%
Brookfield Business Corp., Class A		46,226		835,766
Insurance — 0.3%
F&G Annuities & Life, Inc.		31,514		884,283
Fidelis Insurance Holdings Ltd.		27,968		410,570
GoHealth, Inc., Class A(a)		6,637		96,170
Kingsway Financial Services, Inc.(a)		20,483		154,647
Lemonade, Inc.(a)(b)		90,298		1,049,263
Marqeta, Inc., Class A(a)		871,848		5,213,651
Mercury General Corp.		47,685		1,336,610
Oscar Health, Inc., Class A(a)		275,028		1,531,906
Skyward Specialty Insurance Group, Inc.(a)		42,441		1,161,186
				11,838,286
Insurance: Life — 0.4%
American Equity Investment Life Holding Co.(a)		138,339		7,420,504
CNO Financial Group, Inc.		202,475		4,804,732
National Western Life Group, Inc., Class A		4,047		1,770,522
Selectquote, Inc.(a)		227,928		266,676
Trupanion, Inc.(a)(b)		70,396		1,985,167
				16,247,601
Insurance: Multi-Line — 0.4%
BRP Group, Inc., Class A(a)(b)		107,119		2,488,375
Crawford & Co., Class A		23,973		223,908
eHealth, Inc.(a)		48,558		359,329
Goosehead Insurance, Inc., Class A(a)(b)		38,334		2,857,033
Horace Mann Educators Corp.		63,440		1,863,867
James River Group Holdings Ltd.		52,861		811,416

Security	Shares		Value
Insurance: Multi-Line (continued)
Maiden Holdings Ltd.(a)		155,241	$	273,224
Mr. Cooper Group, Inc.(a)		116,483		6,238,830
SiriusPoint Ltd.(a)(b)		162,661		1,654,262
			16,770,244
Insurance: Property-Casualty — 1.4%
AMERISAFE, Inc.		33,922		1,698,475
Argo Group International Holdings Ltd.		56,891		1,697,627
Donegal Group, Inc., Class A		27,114		386,510
Employers Holdings, Inc., Series 2020		41,660		1,664,317
Enstar Group Ltd.(a)		21,229		5,137,418
Essent Group Ltd.		188,379		8,908,443
Genworth Financial, Inc., Class A(a)		722,338		4,232,901
Greenlight Capital Re Ltd., Class A(a)		44,928		482,527
HCI Group, Inc.		11,828		642,142
Hilltop Holdings, Inc.		83,075		2,356,007
Investors Title Co.		2,120		313,951
NI Holdings, Inc.(a)		13,752		176,988
NMI Holdings, Inc., Class A(a)		146,012		3,955,465
Palomar Holdings, Inc.(a)		43,381		2,201,586
ProAssurance Corp.		77,287		1,459,951
Radian Group, Inc.		251,110		6,305,372
Safety Insurance Group, Inc.		23,247		1,585,213
Selective Insurance Group, Inc.		107,135		11,053,118
Stewart Information Services Corp.		40,510		1,774,338
United Fire Group, Inc., Series 16-2		38,079		752,060
United Insurance Holdings Corp., Series 16-2(a)		31,572		232,370
Universal Insurance Holdings, Inc.		43,826		614,440
				57,631,219
International Trade & Diversified Logistic(a) — 0.0%
CryoPort, Inc.(b)		71,697		982,966
Radiant Logistics, Inc.		64,025		361,741
				1,344,707
Internet & Catalog Retail(a) — 0.0%
BARK, Inc.(b)		226,295		271,554
ThredUp, Inc., Class A(b)		123,845		496,619
Vivid Seats, Inc., Class A		42,989		275,989
				1,044,162
Internet Software & Services(a) — 0.4%
eGain Corp.		40,271		246,861
Flywire Corp.(b)		170,896		5,449,874
Gogo, Inc.		117,928		1,406,881
MediaAlpha, Inc., Class A(b)		37,721		311,576
Outbrain, Inc.		70,537		343,515
Remitly Global, Inc.		232,541		5,864,684
Rent the Runway, Inc., Class A(b)		86,971		59,193
TrueCar, Inc.		153,975		318,728
Xometry, Inc., Class A(b)		60,379		1,025,235
				15,026,547
IT Services — 0.5%
BigBear.ai Holdings, Inc., Series L(a)(b)		48,514		73,256
Bread Financial Holdings, Inc.		45,593		1,559,281
Fastly, Inc., Class A(a)(b)		210,922		4,043,375
Payoneer Global, Inc.(a)		441,513		2,702,060
Paysafe Ltd.(a)		59,359		711,714
Sabre Corp.(a)		589,161		2,645,333
SolarWinds Corp.(a)		92,128		869,688
Squarespace, Inc., Class A(a)		79,468		2,302,188

12

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
IT Services (continued)
StoneCo Ltd., Class A(a)		517,836	$	5,525,310
Thoughtworks Holding, Inc.(a)		168,475		687,378
				21,119,583
Leisure Time — 0.8%
Acushnet Holdings Corp.		55,541		2,945,895
AMMO, Inc.(a)		154,888		312,874
Clarus Corp.		45,706		345,537
Escalade, Inc.		17,369		265,920
Hilton Grand Vacations, Inc.(a)		144,779		5,892,505
JAKKS Pacific, Inc.(a)		13,882		258,066
Johnson Outdoors, Inc., Class A		9,970		545,259
Latham Group, Inc.(a)		68,765		192,542
Life Time Group Holdings, Inc.(a)		79,425		1,208,054
Lindblad Expeditions Holdings, Inc.(a)		62,316		448,675
OneSpaWorld Holdings Ltd.(a)		148,400		1,665,048
Portillo’s, Inc., Class A(a)		80,612		1,240,619
RCI Hospitality Holdings, Inc.		15,556		943,627
SeaWorld Entertainment, Inc.(a)(b)		64,703		2,992,514
Smith & Wesson Brands, Inc.		81,343		1,050,138
Sphere Entertainment Co., Class A(a)		46,402		1,724,298
Sturm Ruger & Co., Inc.		31,108		1,621,349
Topgolf Callaway Brands Corp.(a)		256,033		3,543,497
Vista Outdoor, Inc.(a)		102,780		3,404,074
				30,600,491
Life Sciences Tools & Services — 0.0%
WaVe Life Sciences Ltd.(a)		105,496		606,602
Luxury Items — 0.2%
Movado Group, Inc.		27,506		752,289
Signet Jewelers Ltd.		79,301		5,694,605
Stagwell, Inc., Class A(a)(b)		140,324		658,119
				7,105,013
Machinery(a) — 0.1%
Hillman Solutions Corp.		347,357		2,865,695
Matterport, Inc., Class A		446,115		968,070
Microvast Holdings, Inc.		178,673		337,692
Velo3D, Inc.(b)		153,863		240,026
				4,411,483
Machinery: Agricultural — 0.4%
Alamo Group, Inc.		17,956		3,103,874
Integral Ad Science Holding Corp.(a)		85,151		1,012,445
Lindsay Corp.		19,666		2,314,295
SPX Technologies, Inc.(a)		78,542		6,393,319
Titan International, Inc.(a)		93,248		1,252,321
Titan Machinery, Inc.(a)		36,612		973,147
				15,049,401
Machinery: Construction & Handling — 0.3%
Astec Industries, Inc.		40,436		1,904,940
Douglas Dynamics, Inc.		40,121		1,210,852
Manitowoc Co., Inc.(a)		61,988		932,920
NACCO Industries, Inc., Class A		7,348		257,694
Terex Corp.		119,557		6,888,874
				11,195,280
Machinery: Industrial — 1.3%
Applied Industrial Technologies, Inc.		68,664		10,616,141
Chart Industries, Inc.(a)(b)		76,478		12,933,959
Columbus McKinnon Corp.		50,190		1,752,133
Desktop Metal, Inc., Class A(a)(b)		490,326		715,876
DXP Enterprises, Inc.(a)		25,107		877,239

Security	Shares		Value
Machinery: Industrial (continued)
EnPro Industries, Inc.		37,279	$	4,517,842
EVI Industries, Inc.(a)		9,066		225,018
Gencor Industries, Inc.(a)		18,389		259,837
Hyliion Holdings Corp., Class A(a)(b)		265,296		313,049
Hyster-Yale Materials Handling, Inc.		19,409		865,253
Intevac, Inc.(a)		50,364		156,632
John Bean Technologies Corp.		56,663		5,957,548
Kadant, Inc.		20,801		4,691,665
Kennametal, Inc.		143,501		3,570,305
Mayville Engineering Co., Inc.(a)		21,748		238,576
Nikola Corp.(a)(b)		1,105,675		1,735,910
Omega Flex, Inc.		5,629		443,171
Proto Labs, Inc.(a)		46,907		1,238,345
Tennant Co.		32,940		2,442,501
				53,551,000
Machinery: Specialty — 0.1%
Albany International Corp., Class A		55,667		4,802,949
Manufactured Housing(a) — 0.3%
Cavco Industries, Inc., Series 2020		15,565		4,134,998
Skyline Champion Corp.		95,331		6,074,491
				10,209,489
Marine — 0.0%
Golden Ocean Group Ltd.		218,961		1,725,413
Media — 0.2%
Bumble, Inc., Class A(a)		180,021		2,685,913
Gambling.com Group Ltd.(a)		17,559		229,672
Liberty TripAdvisor Holdings, Inc., Class B		1,166		34,234
PubMatic, Inc., Class A(a)		76,063		920,362
Sinclair, Inc., Class A(b)		58,387		655,102
Townsquare Media, Inc., Class A		21,670		188,962
Urban One, Inc., Class A(a)		12,790		64,206
Urban One, Inc., Class D(a)		18,543		93,271
Vimeo, Inc.(a)		232,955		824,661
ZipRecruiter, Inc., Class A(a)		121,927		1,461,905
				7,158,288
Medical & Dental Instruments & Supplies — 1.6%
Akoya Biosciences, Inc.(a)		40,656		189,050
Alphatec Holdings, Inc.(a)(b)		142,717		1,851,039
AngioDynamics, Inc., Series 2020(a)		64,733		473,198
Anika Therapeutics, Inc.(a)		27,120		505,246
Artivion, Inc.(a)		70,032		1,061,685
AtriCure, Inc.(a)(b)		82,827		3,627,823
Atrion Corp.		2,455		1,014,332
Avanos Medical, Inc.(a)		82,276		1,663,621
Axogen, Inc.(a)(b)		68,907		344,535
BioLife Solutions, Inc.(a)		61,870		854,425
Cerus Corp.(a)		312,719		506,605
Community Health Systems, Inc.(a)		227,855		660,779
CONMED Corp.		54,529		5,499,250
Cutera, Inc.(a)(b)		34,992		210,652
InfuSystem Holdings, Inc.(a)(b)		31,690		305,492
Inmode Ltd.(a)(b)		137,756		4,196,048
LeMaitre Vascular, Inc.		35,114		1,913,011
LivaNova PLC(a)		96,479		5,101,809
Merit Medical Systems, Inc.(a)		101,130		6,979,993
NanoString Technologies, Inc.(a)(b)		79,322		136,434
Neogen Corp.(a)(b)		387,554		7,185,251
Ocular Therapeutix, Inc.(a)		145,211		455,962
OraSure Technologies, Inc.(a)		127,997		759,022

S E R I E S   S C H E D U L E   O F   I N V E S T M E N T S 13

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Medical & Dental Instruments & Supplies (continued)
Orchestra BioMed Holdings, Inc.(a)(b)		24,708	$	215,454
Organogenesis Holdings, Inc., Class A(a)		128,915		409,950
Orthofix Medical, Inc.(a)		62,529		804,123
OrthoPediatrics Corp.(a)(b)		28,219		903,008
Outset Medical, Inc.(a)		88,207		959,692
Owens & Minor, Inc.(a)		132,078		2,134,380
Patterson Cos., Inc.		152,796		4,528,873
Pulmonx Corp.(a)		63,804		659,095
Sanara Medtech, Inc.(a)		6,035		187,870
Semler Scientific, Inc.(a)		9,567		242,715
STAAR Surgical Co.(a)		86,448		3,473,481
Surmodics, Inc.(a)		24,882		798,463
TransMedics Group, Inc.(a)(b)		56,407		3,088,283
Treace Medical Concepts, Inc.(a)(b)		80,396		1,053,992
Utah Medical Products, Inc.		5,988		514,968
				65,469,609
Medical Equipment — 1.0%
Accuray, Inc.(a)		172,305		468,669
AdaptHealth Corp.(a)(b)		170,182		1,548,656
Beyond Air, Inc., Series L(a)(b)		42,993		99,314
CareDx, Inc.(a)		94,148		659,036
ClearPoint Neuro, Inc.(a)(b)		43,569		218,281
Cytek Biosciences, Inc.(a)		215,482		1,189,461
Glaukos Corp.(a)		83,352		6,272,238
Haemonetics Corp.(a)		89,195		7,990,088
iRadimed Corp.		13,000		576,810
iRhythm Technologies, Inc.(a)(b)		54,568		5,143,580
KORU Medical Systems, Inc.(a)		63,861		172,425
Lantheus Holdings, Inc.(a)(b)		121,003		8,407,288
Nevro Corp.(a)(b)		63,148		1,213,704
Quanterix Corp.(a)		62,641		1,700,077
Seer, Inc., Class A(a)		102,718		227,007
SI-BONE, Inc.(a)		61,825		1,313,163
Silk Road Medical, Inc.(a)		68,317		1,024,072
Tactile Systems Technology, Inc.(a)(b)		41,369		581,234
Varex Imaging Corp.(a)		68,991		1,296,341
Zynex, Inc.(a)		36,128		289,024
				40,390,468
Medical Services(a) — 0.0%
Fulgent Genetics, Inc.		36,402		973,389
Innovage Holding Corp.		30,150		180,599
Tela Bio, Inc.		26,671		213,368
				1,367,356
Metal Fabricating — 0.5%
CompX International, Inc.		2,464		45,806
Distribution Solutions Group, Inc.(a)		16,636		432,536
DMC Global, Inc.(a)		34,720		849,598
GrafTech International Ltd.		344,753		1,320,404
Haynes International, Inc.		22,244		1,034,791
MRC Global, Inc.(a)		149,258		1,529,894
Mueller Industries, Inc.		99,726		7,495,406
Mueller Water Products, Inc., Class A		276,122		3,501,227
Northwest Pipe Co.(a)		18,119		546,650
Worthington Industries, Inc.		54,786		3,386,871
				20,143,183
Metals & Minerals: Diversified — 1.0%
Alpha Metallurgical Resources, Inc.		22,203		5,766,785
Commercial Metals Co.		208,454		10,299,712
Compass Minerals International, Inc., Series 20-A		60,940		1,703,273
Constellium SE, Class A(a)		225,265		4,099,823

Security	Shares		Value
Metals & Minerals: Diversified (continued)
Energy Fuels, Inc.(a)(b)		279,446	$	2,297,046
Hecla Mining Co.		1,087,149		4,250,753
Intrepid Potash, Inc.(a)(b)		19,595		493,010
Materion Corp.		36,538		3,723,588
Minerals Technologies, Inc.		57,900		3,170,604
Oil-Dri Corp. of America		8,802		543,523
Perpetua Resources Corp.(a)		59,052		192,510
PolyMet Mining Corp.(a)		59,507		123,775
Ring Energy, Inc.(a)		230,505		449,485
SunCoke Energy, Inc.		148,670		1,509,000
U.S. Lime & Minerals, Inc.(b)		3,699		743,499
U.S. Silica Holdings, Inc.(a)		134,083		1,882,525
				41,248,911
Metals & Mining — 0.0%
Contango ORE, Inc.(a)		7,011		127,179
i-80 Gold Corp.(a)(b)		347,586		531,807
Ramaco Resources, Inc., Class A		38,522		423,357
Ramaco Resources, Inc., Class B		7,704		91,909
				1,174,252
Mining(a) — 0.0%
5E Advanced Materials, Inc., Series C		68,231		154,202
Dakota Gold Corp.(b)		89,236		230,229
Piedmont Lithium, Inc.(b)		31,903		1,266,549
				1,650,980
Office Supplies & Equipment — 0.2%
ACCO Brands Corp.		164,296		943,059
Eastman Kodak Co.(a)		97,664		411,166
HNI Corp.		82,161		2,845,235
MillerKnoll, Inc.		135,113		3,303,513
Pitney Bowes, Inc.		200,937		606,830
Steelcase, Inc., Class A		164,824		1,841,084
				9,950,887
Oil & Gas Producers — 0.4%
Civitas Resources, Inc.		123,194		9,962,699
Crescent Energy Co., Class A(b)		68,013		859,684
HighPeak Energy, Inc.(b)		20,988		354,277
Kosmos Energy Ltd.(a)		812,183		6,643,657
				17,820,317
Oil Well Equipment & Services — 1.5%
Bristow Group, Inc.(a)		42,017		1,183,619
Cactus, Inc., Class A		114,997		5,773,999
ChampionX Corp.(b)		354,054		12,611,404
Dril-Quip, Inc.(a)		60,532		1,705,186
Helix Energy Solutions Group, Inc.(a)		255,972		2,859,207
Helmerich & Payne, Inc.		173,246		7,304,051
Liberty Energy, Inc., Class A		295,407		5,470,938
Nabors Industries Ltd.(a)		16,299		2,007,059
Newpark Resources, Inc.(a)		134,042		926,230
Oceaneering International, Inc.(a)		178,782		4,598,273
Oil States International, Inc.(a)		112,459		941,282
Patterson-UTI Energy, Inc.		629,115		8,706,952
ProPetro Holding Corp.(a)		175,409		1,864,598
RPC, Inc.		151,279		1,352,434
Select Water Solutions, Inc., Class A		144,497		1,148,751
Solaris Oilfield Infrastructure, Inc., Class A		53,881		574,372
TETRA Technologies, Inc.(a)		222,864		1,421,872
				60,450,227
Oil, Gas & Consumable Fuels — 0.7%
Archrock, Inc.		247,351		3,116,623
Ardmore Shipping Corp.		73,470		955,845

14

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Oil, Gas & Consumable Fuels (continued)
DHT Holdings, Inc.		244,003	$	2,513,231
Dorian LPG Ltd.		56,995		1,637,466
Empire Petroleum Corp., Series 2020(a)		25,444		245,026
Encore Energy Corp.		251,770		820,770
Enviva, Inc.		55,307		413,143
Excelerate Energy, Inc., Class A		31,644		539,214
FLEX LNG Ltd.(a)		52,993		1,598,269
Granite Ridge Resources, Inc.		45,331		276,519
Gulfport Energy Corp.(a)(b)		19,468		2,310,073
Noble Corp. PLC		196,930		9,974,504
ProFrac Holding Corp., Class A(a)		47,256		514,145
VAALCO Energy, Inc.		191,816		842,072
Vertex Energy, Inc.(a)		117,445		522,630
Vitesse Energy, Inc.		44,584		1,020,528
				27,300,058
Oil: Crude Producers — 2.4%
Amplify Energy Corp.(a)		66,535		489,032
Berry Corp.		135,683		1,112,601
California Resources Corp.		127,785		7,157,238
Callon Petroleum Co.(a)		108,987		4,263,571
Chord Energy Corp.		74,461		12,067,894
CNX Resources Corp.(a)		283,283		6,396,530
Comstock Resources, Inc.		163,528		1,803,714
CVR Energy, Inc.		52,736		1,794,606
Denbury, Inc.(a)		90,623		8,881,960
Earthstone Energy, Inc., Class A(a)		101,599		2,056,364
Evolution Petroleum Corp.		58,871		402,678
Gevo, Inc.(a)(b)		415,762		494,757
Magnolia Oil & Gas Corp., Class A		326,218		7,473,654
Murphy Oil Corp.		264,435		11,992,127
Northern Oil and Gas, Inc.		145,663		5,860,023
ONE Gas, Inc.		98,215		6,706,120
Overseas Shipholding Group, Inc., Class A(a)		110,667		485,828
PrimeEnergy Resources Corp.(a)		1,464		169,809
Riley Exploration Permian, Inc.		15,696		498,976
SandRidge Energy, Inc.(b)		33,568		525,675
SilverBow Resources, Inc.(a)		31,610		1,130,690
SM Energy Co.		213,603		8,469,359
Talos Energy, Inc.(a)		195,960		3,221,582
Tellurian, Inc.(a)(b)		954,848		1,107,624
Vital Energy, Inc.(a)(b)		30,060		1,665,925
W&T Offshore, Inc.(a)		180,654		791,265
				97,019,602
Oil: Refining & Marketing — 0.5%
Clean Energy Fuels Corp.(a)(b)		301,698		1,155,503
Delek U.S. Holdings, Inc.		116,080		3,297,833
Par Pacific Holdings, Inc.(a)		98,312		3,533,333
PBF Energy, Inc., Class A		202,560		10,843,037
World Kinect Corp.		109,733		2,461,311
				21,291,017
Paints & Coatings — 0.2%
Chase Corp.		13,486		1,715,824
HB Fuller Co.		96,274		6,605,359
Kronos Worldwide, Inc.		39,140		303,335
				8,624,518
Paper — 0.1%
Clearwater Paper Corp.(a)		29,807		1,080,504

Security	Shares		Value
Paper (continued)
Glatfelter Corp.(a)		77,419	$	154,838
Mativ Holdings, Inc.		96,982		1,382,963
				2,618,305
Paper & Forest Products — 0.1%
Sylvamo Corp.		64,768		2,845,906
Personal Care — 0.6%
Beauty Health Co., Class A(a)		145,471		875,735
BellRing Brands, Inc.(a)		238,517		9,834,056
Edgewell Personal Care Co.		91,144		3,368,682
Nu Skin Enterprises, Inc., Class A		88,679		1,880,881
Sterling Check Corp.(a)		56,200		709,244
Thorne HealthTech, Inc.(a)(b)		25,057		255,331
USANA Health Sciences, Inc.(a)		20,216		1,184,860
WD-40 Co.		24,157		4,909,669
				23,018,458
Personal Products — 0.1%
Herbalife Ltd.(a)(b)		175,806		2,459,526
Pharmaceuticals — 2.0%
ACADIA Pharmaceuticals, Inc.(a)		215,448		4,489,936
Aclaris Therapeutics, Inc.(a)(b)		123,478		845,824
Alkermes PLC(a)		295,007		8,263,146
Amneal Pharmaceuticals, Inc., Class A(a)(b)		219,586		926,653
Amphastar Pharmaceuticals, Inc.(a)		67,551		3,106,671
Arrowhead Pharmaceuticals, Inc.(a)		179,898		4,833,859
Assertio Holdings, Inc.(a)		150,903		386,312
Atea Pharmaceuticals, Inc.(a)		134,315		402,945
Axonics, Inc.(a)(b)		87,235		4,895,628
Axsome Therapeutics, Inc.(a)(b)		62,555		4,371,969
Biote Corp., Class A(a)		26,839		137,416
Bright Green Corp.(a)		94,164		37,280
Cassava Sciences, Inc.(a)(b)		70,708		1,176,581
Citius Pharmaceuticals, Inc.(a)(b)		200,965		137,540
Corcept Therapeutics, Inc.(a)		142,688		3,887,535
CorMedix, Inc.(a)		88,417		327,143
Eagle Pharmaceuticals, Inc.(a)		17,753		279,965
Edgewise Therapeutics, Inc.(a)		73,775		422,731
Enanta Pharmaceuticals, Inc.(a)		37,581		419,780
Enliven Therapeutics, Inc.(a)(b)		42,665		582,804
Evolus, Inc.(a)		75,730		692,172
Eyenovia, Inc.(a)(b)		44,656		74,129
Harmony Biosciences Holdings, Inc.(a)(b)		58,651		1,921,993
Harrow Health, Inc.(a)		52,484		754,195
Ikena Oncology, Inc.(a)		40,485		175,300
Innoviva, Inc.(a)		106,042		1,377,486
Intra-Cellular Therapies, Inc.(a)(b)		166,594		8,677,882
Ironwood Pharmaceuticals, Inc., Class A(a)		246,461		2,373,419
Liquidia Corp.(a)(b)		87,568		555,181
Longboard Pharmaceuticals, Inc.(a)		24,357		135,425
Nuvation Bio, Inc., Class A(a)		250,037		335,050
Optinose, Inc.(a)(b)		113,495		139,599
Pacira BioSciences, Inc.(a)(b)		80,993		2,484,865
PetIQ, Inc., Class A(a)		49,153		968,314
Prestige Consumer Healthcare, Inc.(a)		88,618		5,068,063
Rain Oncology, Inc.(a)		31,089		26,793
Revance Therapeutics, Inc.(a)		148,317		1,701,196
Scilex Holding Co., (Acquired 01/06/23, Cost: $1,040,392)(d)		99,274		136,551
scPharmaceuticals, Inc.(a)		49,478		352,283
SIGA Technologies, Inc.		81,168		426,132

S E R I E S   S C H E D U L E   O F   I N V E S T M E N T S 15

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Pharmaceuticals (continued)
Supernus Pharmaceuticals, Inc.(a)		87,390	$	2,409,342
Syndax Pharmaceuticals, Inc.(a)		117,135		1,700,800
Taro Pharmaceutical Industries Ltd.(a)		14,816		558,711
Tarsus Pharmaceuticals, Inc.(a)(b)		40,969		728,019
Terns Pharmaceuticals, Inc.(a)		73,530		369,856
TG Therapeutics, Inc.(a)		243,960		2,039,506
Theravance Biopharma, Inc.(a)		100,245		865,114
Theseus Pharmaceuticals, Inc.(a)		34,367		92,447
Third Harmonic Bio, Inc.(a)		37,467		239,414
Trevi Therapeutics, Inc.(a)		67,467		147,078
Ventyx Biosciences, Inc.(a)		83,204		2,889,675
Voyager Therapeutics, Inc.(a)		54,530		422,608
Xeris Biopharma Holdings, Inc.(a)(b)		231,079		429,807
				81,200,123
Photography — 0.0%
GoPro, Inc., Class A(a)		225,268		707,342
Power Transmission Equipment — 0.3%
Advanced Energy Industries, Inc.(b)		66,929		6,901,718
Babcock & Wilcox Enterprises, Inc.(a)		106,657		449,026
Powell Industries, Inc.		16,306		1,351,767
Vicor Corp.(a)		39,449		2,323,152
				11,025,663
Printing & Copying Services(a) — 0.2%
Casella Waste Systems, Inc., Class A		100,454		7,664,640
Cimpress PLC		31,712		2,220,157
				9,884,797
Producer Durables: Miscellaneous — 0.0%
First Advantage Corp.		97,261		1,341,229
Park-Ohio Holdings Corp.		15,499		308,585
Solo Brands, Inc., Class A(a)		38,288		195,269
				1,845,083
Production Technology Equipment(a) — 0.9%
ACM Research, Inc., Class A		85,567		1,549,190
Axcelis Technologies, Inc.		57,990		9,455,269
Cohu, Inc.		83,059		2,860,552
HireRight Holdings Corp.		27,867		265,015
Ichor Holdings Ltd.		50,733		1,570,694
Maxeon Solar Technologies Ltd.		53,293		617,666
Onto Innovation, Inc.		87,135		11,111,455
Photronics, Inc.		108,613		2,195,069
Ultra Clean Holdings, Inc.		79,125		2,347,639
Veeco Instruments, Inc.(b)		90,454		2,542,662
				34,515,211
Professional Services(a) — 0.2%
Alight, Inc., Class A		708,265		5,021,599
BlackSky Technology, Inc., Class A(b)		204,411		239,161
FiscalNote Holdings, Inc., Class A(b)		107,542		223,687
Innodata, Inc.		43,079		367,464
Legalzoom.com, Inc.		185,215		2,026,252
Planet Labs PBC, Class A(b)		299,044		777,515
Skillsoft Corp.		144,979		128,509
				8,784,187
Publishing — 0.2%
Daily Journal Corp.(a)		2,447		719,418
Gannett Co., Inc.(a)(b)		256,849		629,280

Security	Shares		Value
Publishing (continued)
John Wiley & Sons, Inc., Class A		75,933	$	2,822,430
Scholastic Corp.		48,561		1,852,116
				6,023,244
Radio & TV Broadcasters — 0.2%
Entravision Communications Corp., Class A		112,738		411,494
Gray Television, Inc.		147,278		1,019,164
iHeartMedia, Inc., Class A(a)		186,275		588,629
TEGNA, Inc.		359,245		5,234,199
				7,253,486
Railroad Equipment — 0.1%
Greenbrier Cos., Inc.		54,309		2,172,360
Trinity Industries, Inc.		144,461		3,517,625
				5,689,985
Real Estate — 0.5%
Anywhere Real Estate, Inc.(a)		191,792		1,233,223
Cushman & Wakefield PLC(a)		254,184		1,936,882
eXp World Holdings, Inc.		126,806		2,059,330
Kennedy-Wilson Holdings, Inc.		212,918		3,138,411
Newmark Group, Inc., Class A		244,208		1,570,258
Opendoor Technologies, Inc.(a)(b)		970,785		2,562,872
Redfin Corp.(a)(b)		189,108		1,331,320
RMR Group, Inc., Class A		28,818		706,617
St. Joe Co.		61,271		3,328,853
Stratus Properties, Inc.(a)		9,109		249,587
Tejon Ranch Co.(a)(b)		37,405		606,709
				18,724,062
Real Estate Investment Trusts (REITs) — 6.0%
Acadia Realty Trust		166,264		2,385,888
AFC Gamma, Inc.		28,328		332,571
Alexander & Baldwin, Inc.		129,027		2,158,622
Alexander’s, Inc.		3,821		696,301
Alpine Income Property Trust, Inc.		22,727		371,814
American Assets Trust, Inc., Series A		86,832		1,688,882
Angel Oak Mortgage REIT, Inc., Series 2020		23,255		198,365
Apartment Investment and Management Co., Class A(a)		263,863		1,794,268
Apollo Commercial Real Estate Finance, Inc.		252,597		2,558,808
Apple Hospitality REIT, Inc.		383,656		5,885,283
Arbor Realty Trust, Inc.		285,682		4,336,653
Ares Commercial Real Estate Corp.		92,447		880,095
Armada Hoffler Properties, Inc.		119,845		1,227,213
ARMOUR Residential REIT, Inc.		407,527		1,731,990
Blackstone Mortgage Trust, Inc., Class A		306,590		6,668,332
Braemar Hotels & Resorts, Inc.		116,745		323,384
Brandywine Realty Trust		289,931		1,316,287
BrightSpire Capital, Inc., Class A		229,180		1,434,667
Broadstone Net Lease, Inc.		334,487		4,783,164
BRT Apartments Corp.		21,875		377,781
CareTrust REIT, Inc.		178,203		3,653,161
CBL & Associates Properties, Inc.		47,862		1,004,145
Centerspace		26,887		1,620,211
Chatham Lodging Trust		87,903		841,232
Chicago Atlantic Real Estate Finance, Inc.		28,747		423,156
Chimera Investment Corp.		414,216		2,261,619
City Office REIT, Inc.		65,402		277,959
Claros Mortgage Trust, Inc.		161,462		1,788,999
Clipper Realty, Inc.		23,302		120,704
Community Healthcare Trust, Inc.		45,407		1,348,588
CoreCivic, Inc.(a)		202,283		2,275,684

16

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Real Estate Investment Trusts (REITs) (continued)
Corporate Office Properties Trust		200,638	$	4,781,204
CTO Realty Growth, Inc.		39,929		647,249
DiamondRock Hospitality Co.		374,127		3,004,240
Diversified Healthcare Trust		425,019		824,537
Douglas Emmett, Inc.		137,621		1,756,044
Dynex Capital, Inc.		96,081		1,147,207
Easterly Government Properties, Inc.		167,280		1,912,010
Ellington Financial, Inc.		116,184		1,448,814
Elme Communities		156,365		2,132,819
Empire State Realty Trust, Inc., Series 2020, Class A		234,993		1,889,344
Equity Commonwealth		186,707		3,429,808
Essential Properties Realty Trust, Inc.		277,513		6,002,606
Farmland Partners, Inc.		85,603		878,287
Four Corners Property Trust, Inc.		154,195		3,421,587
Franklin BSP Realty Trust, Inc.		147,895		1,958,130
GEO Group, Inc.(a)		214,295		1,752,933
Getty Realty Corp.		79,750		2,211,467
Gladstone Commercial Corp.		72,071		876,383
Gladstone Land Corp.		59,619		848,378
Global Medical REIT, Inc.		109,543		982,601
Global Net Lease, Inc.		346,274		3,327,693
Granite Point Mortgage Trust, Inc.		93,415		455,865
Hannon Armstrong Sustainable Infrastructure Capital, Inc.		184,071		3,902,305
Hersha Hospitality Trust, Class A		54,515		537,518
Hudson Pacific Properties, Inc.		245,712		1,633,985
Independence Realty Trust, Inc.		401,465		5,648,613
Innovative Industrial Properties, Inc.		49,685		3,759,167
InvenTrust Properties Corp.		120,958		2,880,010
Invesco Mortgage Capital, Inc.		75,747		758,227
JBG SMITH Properties		194,436		2,811,545
Kite Realty Group Trust		387,392		8,297,937
KKR Real Estate Finance Trust, Inc.		104,781		1,243,750
Ladder Capital Corp., Class A		201,488		2,067,267
LTC Properties, Inc.		72,961		2,344,237
LXP Industrial Trust		515,550		4,588,395
MFA Financial, Inc.		181,997		1,748,991
National Health Investors, Inc.		74,277		3,814,867
New York Mortgage Trust, Inc.		161,890		1,374,446
NexPoint Diversified Real Estate Trust(b)		54,870		477,918
Nexpoint Real Estate Finance, Inc.		14,959		244,729
NexPoint Residential Trust, Inc.		40,148		1,291,963
Office Properties Income Trust		81,669		334,843
One Liberty Properties, Inc.		29,385		554,495
Orchid Island Capital, Inc.		79,665		677,949
Orion Office REIT, Inc.		98,804		514,769
Outfront Media, Inc.		262,551		2,651,765
Paramount Group, Inc.		329,124		1,520,553
Peakstone Realty Trust, Class E		64,363		1,071,000
Pebblebrook Hotel Trust		216,131		2,937,220
PennyMac Mortgage Investment Trust		157,212		1,949,429
Phillips Edison & Co., Inc.		209,915		7,040,549
Physicians Realty Trust		423,477		5,162,185
Piedmont Office Realty Trust, Inc., Class A		219,705		1,234,742
Plymouth Industrial REIT, Inc.		76,388		1,600,329
Postal Realty Trust, Inc., Class A		33,567		453,154
PotlatchDeltic Corp.		140,778		6,389,913
Ready Capital Corp.		284,959		2,880,935
Redwood Trust, Inc.		202,632		1,444,766
Retail Opportunity Investments Corp.		219,009		2,711,331
RLJ Lodging Trust		278,592		2,727,416

Security	Shares		Value
Real Estate Investment Trusts (REITs) (continued)
RPT Realty		152,886	$	1,614,476
Sabra Health Care REIT, Inc.		411,857		5,741,287
Safehold, Inc.		77,880		1,386,264
Saul Centers, Inc.		21,063		742,892
Service Properties Trust		293,395		2,256,208
SL Green Realty Corp.		94,957		3,541,896
Star Holdings(a)		21,854		273,612
Summit Hotel Properties, Inc.		186,436		1,081,329
Sunstone Hotel Investors, Inc.		370,667		3,465,736
Tanger Factory Outlet Centers, Inc.		181,808		4,108,861
Terreno Realty Corp.		145,489		8,263,775
TPG RE Finance Trust, Inc.		122,871		826,922
Two Harbors Investment Corp.		173,010		2,290,652
UMH Properties, Inc.		99,139		1,389,929
Uniti Group, Inc.		423,819		2,000,426
Universal Health Realty Income Trust		22,888		925,362
Urban Edge Properties		204,424		3,119,510
Veris Residential, Inc.		140,753		2,322,424
Whitestone REIT		86,527		833,255
Xenia Hotels & Resorts, Inc.		195,496		2,302,943
				244,226,004
Real Estate Management & Development — 0.2%
American Realty Investors, Inc.(a)		2,389		34,927
Bluegreen Vacations Holding Corp.		19,633		720,138
Compass, Inc., Class A(a)		531,204		1,540,492
DigitalBridge Group, Inc., Class A		287,848		5,060,368
Forestar Group, Inc.(a)		32,900		886,326
Maui Land & Pineapple Co., Inc.(a)(b)		13,156		174,317
Transcontinental Realty Investors, Inc.(a)		3,272		100,189
				8,516,757
Recreational Vehicles & Boats — 0.3%
Camping World Holdings, Inc., Class A		74,364		1,517,769
Lazydays Holdings, Inc.(a)		22,188		168,629
LCI Industries		43,973		5,163,310
Malibu Boats, Inc., Class A(a)(b)		36,173		1,773,200
Marine Products Corp.		14,954		212,496
MasterCraft Boat Holdings, Inc.(a)		30,695		682,043
Winnebago Industries, Inc.		52,188		3,102,577
				12,620,024
Rental & Leasing Services: Consumer — 0.1%
Upbound Group, Inc., Class A		98,043		2,887,366
Restaurants — 0.8%
Biglari Holdings, Inc., Series L, Class B(a)		1,350		224,100
BJ’s Restaurants, Inc.(a)		40,587		952,171
Bloomin’ Brands, Inc.		155,926		3,834,220
Brinker International, Inc.(a)		78,035		2,465,126
Carrols Restaurant Group, Inc.(a)		68,119		448,904
Cheesecake Factory, Inc.		86,306		2,615,072
Cracker Barrel Old Country Store, Inc.		39,251		2,637,667
Dave & Buster’s Entertainment, Inc., Series B(a)(b)		64,304		2,383,749
Denny’s Corp.(a)		97,113		822,547
Dine Brands Global, Inc.		27,823		1,375,847
El Pollo Loco Holdings, Inc.		52,306		468,139
Fiesta Restaurant Group, Inc.(a)		30,882		261,262
Jack in the Box, Inc.		36,562		2,524,972
Kura Sushi USA, Inc., Class A(a)		10,374		685,929
Nathan’s Famous, Inc.		4,919		347,577
Noodles & Co., Class A(a)		67,772		166,719
ONE Group Hospitality, Inc.(a)		38,498		211,739
Papa John’s International, Inc.		58,488		3,990,051
Potbelly Corp.(a)		47,663		371,772

S E R I E S   S C H E D U L E   O F   I N V E S T M E N T S 17

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Restaurants (continued)
Red Robin Gourmet Burgers, Inc.(a)		27,221	$	218,857
Rush Street Interactive, Inc., Class A(a)		115,455		533,402
Shake Shack, Inc., Class A(a)		67,190		3,901,723
Sweetgreen, Inc., Class A(a)		171,844		2,019,167
				33,460,712
Road & Rail — 0.0%
TuSimple Holdings, Inc., Class A(a)(b)		291,662		454,993
Scientific Instruments: Control & Filter — 0.8%
Arlo Technologies, Inc.(a)		155,452		1,601,156
CIRCOR International, Inc.(a)		36,146		2,015,140
Energy Recovery, Inc.(a)(b)		99,080		2,101,487
ESCO Technologies, Inc.		45,560		4,758,286
Gorman-Rupp Co.		40,727		1,339,918
Helios Technologies, Inc.		58,292		3,234,040
Napco Security Technologies, Inc.		56,136		1,249,026
Resideo Technologies, Inc.(a)		260,578		4,117,132
Thermon Group Holdings, Inc.(a)		59,469		1,633,613
Watts Water Technologies, Inc., Class A		48,669		8,410,977
				30,460,775
Scientific Instruments: Electrical — 0.7%
Allied Motion Technologies, Inc.		23,007		711,376
Atkore, Inc.(a)		68,770		10,259,796
AZZ, Inc.		44,145		2,012,129
EnerSys		73,412		6,949,914
Franklin Electric Co., Inc.		82,181		7,333,011
FTC Solar, Inc.(a)(b)		109,681		140,392
Preformed Line Products Co., Preference Shares		4,418		718,279
				28,124,897
Scientific Instruments: Gauges & Meters — 0.4%
Badger Meter, Inc.		52,342		7,530,444
FARO Technologies, Inc.(a)		34,249		521,612
Itron, Inc.(a)		81,047		4,909,827
Mesa Laboratories, Inc.		9,170		963,492
Transcat, Inc.(a)(b)		13,129		1,286,248
Vishay Precision Group, Inc.(a)		22,635		760,083
				15,971,706
Scientific Instruments: Pollution Control(a) — 0.1%
CECO Environmental Corp.		52,797		843,168
Heritage-Crystal Clean, Inc.		31,376		1,422,902
				2,266,070
Securities Brokerage & Services — 0.1%
StoneX Group, Inc.(a)		31,783		3,080,408
Semiconductors & Components — 1.8%
Alpha & Omega Semiconductor Ltd.(a)		41,242		1,230,661
Amkor Technology, Inc.		182,286		4,119,664
Atomera, Inc.(a)(b)		37,334		233,711
CEVA, Inc.(a)		41,340		801,583
Diodes, Inc.(a)		80,353		6,335,031
FormFactor, Inc.(a)		137,267		4,796,109
Kulicke & Soffa Industries, Inc.		98,742		4,801,823
MACOM Technology Solutions Holdings, Inc., Class H(a)		96,732		7,891,397
MaxLinear, Inc.(a)		132,680		2,952,130
Power Integrations, Inc.		101,072		7,712,804
Rambus, Inc.(a)		194,007		10,823,651
Semtech Corp.(a)(b)		113,750		2,929,062
Silicon Laboratories, Inc.(a)		56,499		6,547,669
SiTime Corp.(a)		30,558		3,491,251

Security	Shares		Value
Semiconductors & Components (continued)
SkyWater Technology, Inc.(a)(b)		30,222	$	181,936
SMART Global Holdings, Inc.(a)		85,959		2,093,102
Vishay Intertechnology, Inc.		229,468		5,672,449
				72,614,033
Semiconductors & Semiconductor Equipment(a) — 0.3%
Aehr Test Systems		45,999		2,102,154
Ambarella, Inc.		67,458		3,577,298
Credo Technology Group Holding Ltd.		173,562		2,646,821
indie Semiconductor, Inc., Class A		245,067		1,543,922
inTEST Corp.		18,072		274,152
Navitas Semiconductor Corp.		194,532		1,351,997
Transphorm, Inc.(b)		43,608		96,810
				11,593,154
Shipping — 1.0%
A-Mark Precious Metals, Inc.		33,458		981,323
Eagle Bulk Shipping, Inc.		16,459		691,772
Eneti, Inc.		42,987		433,309
Genco Shipping & Trading Ltd.		74,947		1,048,508
Golar LNG Ltd.		180,247		4,372,792
Himalaya Shipping Ltd.		14,533		70,194
International Seaways, Inc.		72,271		3,252,195
Matson, Inc.		63,398		5,624,671
Nordic American Tankers Ltd.		365,085		1,504,150
Pangaea Logistics Solutions Ltd.		63,556		373,709
Safe Bulkers, Inc.		123,450		399,978
Scorpio Tankers, Inc.		87,855		4,754,713
SFL Corp. Ltd.		204,823		2,283,776
SITE Centers Corp.		339,138		4,181,572
Teekay Corp.(a)		118,575		731,608
Teekay Tankers Ltd., Class A		42,538		1,770,857
Tidewater, Inc.(a)		84,527		6,007,334
				38,482,461
Software — 1.3%
Amplitude, Inc., Class A(a)		120,424		1,393,306
AvePoint, Inc., Class A(a)		272,698		1,832,530
AvidXchange Holdings, Inc.(a)(b)		265,724		2,519,063
Bit Digital, Inc.(a)(b)		127,023		271,829
Braze, Inc., Class A(a)		93,208		4,355,610
C3.ai, Inc., Class A(a)(b)		107,604		2,746,054
Cipher Mining, Inc.(a)(b)		74,178		172,835
Clear Secure, Inc., Class A		148,283		2,823,308
Consensus Cloud Solutions, Inc.(a)		34,848		877,473
Couchbase, Inc., Series 2020(a)(b)		60,469		1,037,648
CS Disco, Inc.(a)		37,538		249,252
CXApp, Inc.(b)		3,143		5,689
Enfusion, Inc., Class A(a)		68,534		614,750
EngageSmart, Inc.(a)		86,430		1,554,876
EverCommerce, Inc.(a)		39,680		397,990
Expensify, Inc., Class A(a)		94,809		308,129
Freshworks, Inc., Class A(a)		288,229		5,741,522
Instructure Holdings, Inc.(a)(b)		34,783		883,488
Intapp, Inc.(a)(b)		39,156		1,312,509
Jamf Holding Corp.(a)(b)		124,268		2,194,573
Kaltura, Inc.(a)		151,352		261,839
MarketWise, Inc., Class A		51,156		81,850
MeridianLink, Inc.(a)(b)		46,704		796,770
Model N, Inc.(a)		66,386		1,620,482
N-able, Inc.(a)		124,412		1,604,915
NextNav, Inc.(a)(b)		95,719		491,996
Olo, Inc., Class A(a)		183,949		1,114,731

18

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Software (continued)
Qualys, Inc.(a)		66,183	$	10,096,217
SEMrush Holdings, Inc., Class A(a)		57,839		491,631
SoundHound AI, Inc., Class A(a)(b)		248,465		499,415
Sprinklr, Inc., Class A(a)(b)		183,408		2,538,367
Terawulf, Inc.(a)(b)		256,302		322,940
Weave Communications, Inc.(a)		60,371		492,024
Zeta Global Holdings Corp., Class A(a)(b)		244,665		2,042,953
				53,748,564
Specialty Retail — 2.1%
1-800-Flowers.com, Inc., Class A(a)		44,799		313,593
Aaron’s Co., Inc.		54,498		570,594
Abercrombie & Fitch Co., Class A(a)		86,849		4,895,678
Academy Sports & Outdoors, Inc.		132,853		6,279,961
Alta Equipment Group, Inc., Class A		42,374		511,030
American Eagle Outfitters, Inc.		325,094		5,399,811
America’s Car-Mart, Inc.(a)		10,727		976,050
Arko Corp.		146,860		1,050,049
Asbury Automotive Group, Inc.(a)		36,842		8,476,239
Big 5 Sporting Goods Corp., Series L		39,098		274,077
Blink Charging Co.(a)(b)		95,934		293,558
Boot Barn Holdings, Inc.(a)(b)		52,930		4,297,387
Buckle, Inc.		54,338		1,814,346
Build-A-Bear Workshop, Inc.		23,386		687,782
Caleres, Inc.		61,726		1,775,240
Carvana Co., Class A(a)(b)		170,682		7,165,230
Cato Corp., Series 2020, Class A		33,287		254,978
Chico’s FAS, Inc.(a)		214,045		1,601,057
Children’s Place, Inc.(a)		20,571		556,034
Designer Brands, Inc., Class A		87,798		1,111,523
Destination XL Group, Inc.(a)(b)		99,834		447,256
Envela Corp.(a)		16,538		78,390
EVgo, Inc., Class A(a)(b)		185,400		626,652
Foot Locker, Inc.		146,091		2,534,679
Genesco, Inc.(a)		21,047		648,668
Group 1 Automotive, Inc.(b)		24,778		6,658,096
Guess?, Inc.		51,195		1,107,860
Haverty Furniture Cos., Inc.		26,441		760,972
Hibbett, Inc.		22,696		1,078,287
J Jill, Inc.(a)(b)		8,481		251,038
Lands’ End, Inc.(a)		26,544		198,284
Leslie’s, Inc.(a)		315,966		1,788,368
MarineMax, Inc.(a)		38,016		1,247,685
Monro, Inc.		55,427		1,539,208
National Vision Holdings, Inc.(a)		138,161		2,235,445
ODP Corp.(a)		58,594		2,704,113
OneWater Marine, Inc., Class A(a)(b)		21,028		538,737
Sally Beauty Holdings, Inc.(a)		190,916		1,599,876
Shoe Carnival, Inc.		32,591		783,162
Sonic Automotive, Inc., Class A		27,913		1,333,125
Sportsman’s Warehouse Holdings, Inc.(a)		64,258		288,518
Tilly’s, Inc., Class A(a)		41,556		337,435
Torrid Holdings, Inc.(a)(b)		20,346		44,965
Urban Outfitters, Inc.(a)		113,539		3,711,590
Warby Parker, Inc., Class A(a)		150,755		1,983,936
Zumiez, Inc.(a)		27,797		494,787
				83,325,349
Steel — 0.5%
ATI, Inc.(a)(b)		229,475		9,442,896
Carpenter Technology Corp.		85,718		5,761,107
Ivanhoe Electric, Inc.(a)		99,478		1,183,788
Olympic Steel, Inc.		17,535		985,642

Security	Shares		Value
Steel (continued)
Ryerson Holding Corp.		42,847	$	1,246,419
Schnitzer Steel Industries, Inc., Class A		46,024		1,281,769
TimkenSteel Corp.(a)		77,345		1,679,934
				21,581,555
Technology Hardware & Equipment — 0.2%
CompoSecure, Inc., Class A(a)(b)		27,101		174,801
CPI Card Group, Inc.(a)		6,890		127,603
IonQ, Inc.(a)(b)		285,935		4,254,713
Xerox Holdings Corp.		204,207		3,204,008
				7,761,125
Technology: Miscellaneous — 0.5%
Aeva Technologies, Inc.(a)		149,503		114,355
Benchmark Electronics, Inc.		62,918		1,526,391
CTS Corp.		55,792		2,328,758
Fabrinet(a)		65,489		10,911,777
Kimball Electronics, Inc.(a)		42,603		1,166,470
Plexus Corp.(a)		48,834		4,540,585
				20,588,336
Telecommunications Equipment(a) — 0.2%
Akoustis Technologies, Inc.(b)		128,450		96,710
Cambium Networks Corp.		20,578		150,837
Clearfield, Inc.(b)		23,275		667,061
Knowles Corp.		159,905		2,368,193
Viavi Solutions, Inc.		393,598		3,597,486
				6,880,287
Textile Products — 0.0%
Interface, Inc.		101,978		1,000,404
Textiles Apparel & Shoes — 0.4%
Fossil Group, Inc.(a)		95,290		196,297
G-III Apparel Group Ltd.(a)		73,499		1,831,595
Hanesbrands, Inc.		626,130		2,479,475
Kontoor Brands, Inc.		99,986		4,390,385
Oxford Industries, Inc.		26,639		2,560,807
Rocky Brands, Inc.		11,548		169,756
Steven Madden Ltd.		133,939		4,255,242
Vera Bradley, Inc.(a)(b)		49,511		327,268
Weyco Group, Inc.		10,748		272,462
Wolverine World Wide, Inc.		138,220		1,114,053
				17,597,340
Textiles, Apparel & Luxury Goods — 0.0%
Allbirds, Inc., Class A(a)(b)		158,101		175,492
Toys — 0.0%
Funko, Inc., Class A(a)(b)		60,533		463,077
Trading Companies & Distributors — 0.0%
Hudson Technologies, Inc.(a)		77,968		1,036,974
Transportation Miscellaneous — 0.2%
Costamare, Inc.		86,167		828,927
Hub Group, Inc., Class A(a)		55,917		4,391,721
Textainer Group Holdings Ltd.		74,624		2,779,744
				8,000,392
Truckers — 0.5%
ArcBest Corp.		42,926		4,363,428
Covenant Logistics Group, Inc., Class A		14,810		649,418
Daseke, Inc., Series B(a)		75,772		388,710
Forward Air Corp.		46,528		3,198,335
FRP Holdings, Inc.(a)		11,405		615,528
FTAI Infrastructure, Inc.		176,671		568,881
Heartland Express, Inc.		83,343		1,224,309

S E R I E S   S C H E D U L E   O F   I N V E S T M E N T S 19

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Truckers (continued)
Marten Transport Ltd.		103,336	$	2,036,752
PAM Transportation Services, Inc.(a)		9,854		212,354
RXO, Inc.(a)(b)		206,756		4,079,296
Universal Logistics Holdings, Inc.		11,413		287,379
Werner Enterprises, Inc.		112,655		4,387,912
				22,012,302
Utilities: Electrical — 1.1%
ALLETE, Inc.		102,838		5,429,847
Avista Corp.		132,382		4,285,205
Black Hills Corp.		118,577		5,998,811
Genie Energy Ltd., Class B		35,355		520,779
MGE Energy, Inc.		64,921		4,447,738
NorthWestern Corp.		107,088		5,146,649
Otter Tail Corp.		73,457		5,576,856
PNM Resources, Inc.		152,548		6,805,166
Portland General Electric Co.		172,836		6,996,401
Unitil Corp.		28,375		1,211,896
				46,419,348
Utilities: Gas Distributors — 0.6%
Chesapeake Utilities Corp.		31,106		3,040,611
New Jersey Resources Corp.		172,949		7,026,918
Northwest Natural Holding Co.		63,892		2,438,119
RGC Resources, Inc.		14,637		253,220
Southwest Gas Holdings, Inc.		109,922		6,640,388
Spire, Inc.		91,709		5,188,895
				24,588,151
Utilities: Miscellaneous — 0.3%
Brookfield Infrastructure Corp., Class A		176,496		6,237,369
Ormat Technologies, Inc.		95,155		6,653,237
				12,890,606
Utilities: Telecommunications — 0.5%
8x8, Inc.(a)		209,626		528,258
ATN International, Inc.		19,607		618,797
Cogent Communications Holdings, Inc.		77,030		4,768,157
Consolidated Communications Holdings, Inc.(a)		133,732		457,363
Globalstar, Inc.(a)(b)		1,227,792		1,608,407
IDT Corp., Class B(a)		28,415		626,551
LiveVox Holdings, Inc., Class A(a)		36,149		120,738
Shenandoah Telecommunications Co.		86,421		1,781,137
Spok Holdings, Inc.		32,304		460,978
Telephone and Data Systems, Inc.		176,033		3,223,164
Xperi, Inc.(a)		75,842		747,802
Ziff Davis, Inc.(a)		83,742		5,333,528
				20,274,880
Utilities: Water — 0.5%
American States Water Co.		65,933		5,187,608
Artesian Resources Corp., Class A		16,723		702,199
California Water Service Group		102,832		4,864,982
Consolidated Water Co. Ltd.		26,846		763,500
Global Water Resources, Inc.		19,053		185,767
Middlesex Water Co.		31,178		2,065,543

Security	Shares		Value
Utilities: Water (continued)
Pure Cycle Corp.(a)		35,602	$	341,779
SJW Group		56,796		3,414,008
York Water Co.		25,484		955,395
				18,480,781
Total Common Stocks — 98.2% (Cost: $3,581,439,377)				3,973,396,624
Investment Companies
Equity Funds — 0.7%
iShares Russell 2000 ETF(b)(e)(f)		146,116		25,824,542
Total Investment Companies — 0.7% (Cost: $24,587,296)				25,824,542
Rights
Biotechnology(c) — 0.0%
Aduro Biotech, Inc., CVR		21,953		55,738
Chinook Therapeutics, Inc., CVR		100,285		43,123
GTx, Inc., CVR(b)		944		968
Total Rights — 0.0% (Cost: $41,046)				99,829
Total Long-Term Investments —98.9% (Cost: $3,606,067,719)				3,999,320,995
Short-Term Securities
Money Market Funds — 8.9%
BlackRock Cash Funds: Institutional, SL Agency Shares, 5.54%(e)(f)(g)		294,223,752		294,312,020
BlackRock Cash Funds: Treasury, SL Agency Shares, 5.31%(e)(f)		66,401,000		66,401,000
Total Short-Term Securities —8.9% (Cost: $360,556,814)				360,713,020
Total Investments — 107.8% (Cost: $3,966,624,533)				4,360,034,015
Liabilities in Excess of Other Assets — (7.8)%				(314,761,064	)
Net Assets — 100.0%			$	4,045,272,951

^(a)  Non-income producing security.

^(b)  All or a portion of this security is on loan.

^(c)  Security is valued using significant unobservable inputs and is classified as Level 3 in the fair value hierarchy.

^(d)  Restricted security as to resale, excluding 144A securities. The Series held restricted securities with a current value of $136,551, representing less than 0.05% of its net assets as of period end, and an original cost of $1,040,392.

^(e)  Affiliate of the Series.

^(f)  Annualized 7-day yield as of period end.

^(g)  All or a portion of this security was purchased with the cash collateral from loaned securities.

For Series compliance purposes, the Series’s industry classifications refer to one or more of the industry sub-classifications used by one or more widely recognized market indexes or rating group indexes, and/or as defined by the investment adviser. These definitions may not apply for purposes of this report, which may combine such industry sub-classifications for reporting ease.

20

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series

Affiliates

Investments in issuers considered to be affiliate(s) of the Series during the period ended September 30, 2023 for purposes of Section 2(a)(3) of the Investment Company Act of 1940, as amended, were as follows:

Affiliated Issuer	Value at 12/31/22		Purchases at Cost			Proceeds from Sales			Net Realized Gain (Loss)		Change in Unrealized Appreciation (Depreciation)			Value at 09/30/23		Shares Held at 09/30/23		Income			Capital Gain Distributions from Underlying Funds
BlackRock Cash Funds: Institutional, SL Agency Shares	$	319,335,055	$	—			$ (25,034,472	)(a)	$	20,526	$	(9,089	)	$	294,312,020		294,223,752	$	4,280,677	(b)	$	—
BlackRock Cash Funds: Treasury, SL Agency Shares		34,903,521		31,497,479	(a)		—			—		—			66,401,000		66,401,000		1,558,666			—
iShares Russell 2000 ETF		34,305,853		240,219,733			(249,620,791	)		478,809		440,938			25,824,542		146,116		312,824			—
									$	499,335	$	431,849		$	386,537,562			$	6,152,167		$	—

^(a)  Represents net amount purchased (sold).

^(b)  All or a portion represents securities lending income earned from the reinvestment of cash collateral from loaned securities, net of fees and collateral investment expenses, and other payments to and from borrowers of securities.

Derivative Financial Instruments Outstanding as of Period End

Futures Contracts

Description	Number of Contracts		Expiration Date		Notional Amount (000)		Value/  Unrealized  Appreciation  (Depreciation)
Long Contracts
Russell 2000 E-Mini Index		285		12/15/23	$	25,630		$	(362,664	)

OTC Total Return Swaps

Reference Entity	Payment   Frequency		Counterparty(a)	Termination Date		Net Notional		Accrued Unrealized Appreciation (Depreciation)				Net Value of Reference Entity		Gross    Notional    Amount    Net Asset    Percentage
Equity Securities Long		Monthly	Goldman Sachs Bank USA(b)		08/19/26	$	9,957,952		$	(139,620	)(c)	$	9,800,709		0.2%
		Monthly	HSBC Bank PLC(d)		02/10/28		6,994,364			(190,004	)(e)		6,821,664		0.2
		Monthly	JPMorgan Chase Bank N.A.(f)		02/08/24		6,389,605			(224,809	)(g)		6,163,133		0.2
									$	(554,433	)	$	22,785,506

^(a)  The Series receives the total return on a portfolio of long positions underlying the total return swap. The Series pays the total return on a portfolio of short positions underlying the total return swap. In addition, the Series pays or receives a variable rate of interest, based on a specified benchmark. The benchmark and spread are determined based upon the country and/or currency of the individual underlying positions.

^(c)  Amount includes $17,623 of net dividends and financing fees.

^(e)  Amount includes $(17,304) of net dividends and financing fees.

^(g)  Amount includes $1,663 of net dividends and financing fees.

The following are the specified benchmarks (plus or minus a range) used in determining the variable rate of interest:

	(b)	(d)	(f)
Range:	0-75 basis points	40 basis points	40 basis points
Benchmarks:	USD - 1D Overnight Fed Funds Effective Rate (FEDL01)	USD - 1D Overnight Bank Funding Rate (OBFR01)	USD - 1D Overnight Bank Funding Rate (OBFR01)

S E R I E S   S C H E D U L E   O F   I N V E S T M E N T S 21

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series

The following table represents the individual long positions and related values of the equity securities underlying the total return swap with Goldman Sachs Bank USA as of period end, termination date 08/19/26:

Security	Shares		Value		% of Basket Value
Reference Entity — Long
Common Stocks
Asset Management & Custodian
Artisan Partners Asset Management, Inc., Class A		5,219	$	195,295		2.0	%
Banks: Diversified
Atlantic Union Bankshares Corp.		7,995		230,096		2.3
Bank of Hawaii Corp.		8,439		419,334		4.3
BankUnited, Inc.		15,950		362,065		3.7
Banner Corp.		3,850		163,163		1.7
Berkshire Hills Bancorp, Inc.		10,665		213,833		2.2
Cadence Bank		39,474		837,638		8.5
Cathay General Bancorp		5,718		198,758		2.0
Central Pacific Financial Corp.		3,496		58,313		0.6
City Holding Co.		1,993		180,068		1.8
Community Bank System, Inc.		6,681		282,005		2.9
CVB Financial Corp.		14,998		248,517		2.5
First BanCorp./Puerto Rico		5,405		72,751		0.7
First Financial Bancorp		542		10,623		0.1
Fulton Financial Corp.		18,340		222,097		2.3
Hanmi Financial Corp.		8,735		141,769		1.4
Hope Bancorp, Inc.		15,558		137,688		1.4
Independent Bank Corp.		4,291		210,645		2.2
National Bank Holdings Corp., Class A		2,849		84,786		0.9
NBT Bancorp, Inc.		4,614		146,218		1.5
OFG Bancorp		5,826		173,964		1.8
Pacific Premier Bancorp, Inc.		1,697		36,927		0.4
Simmons First National Corp., Class A		31,036		526,371		5.4
Trustmark Corp.		1,313		28,532		0.3
				4,986,161
Banks: Savings, Thrift & Mortgage Lending
Northwest Bancshares, Inc.		27,555		281,888		2.9
Washington Federal, Inc.		11,688		299,447		3.1
WSFS Financial Corp.		8,737		318,900		3.2
				900,235
Diversified Financial Services
Jackson Financial, Inc., Class A		2,525		96,506		1.0
Moelis & Co., Class A		5,494		247,944		2.5
				344,450
Insurance: Multi-Line
Horace Mann Educators Corp.		4,632		136,088		1.4
Insurance: Property-Casualty
Genworth Financial, Inc., Class A		43,936		257,465		2.6
ProAssurance Corp.		5,414		102,270		1.0
Radian Group, Inc.		17,737		445,376		4.5
Stewart Information Services Corp.		7,056		309,053		3.2
				1,114,164
IT Services
Bread Financial Holdings, Inc.		11,121		380,338		3.9
Payoneer Global, Inc.		8,076		49,425		0.5
			429,763

Security	Shares		Value		% of Basket Value
Office Supplies & Equipment
Pitney Bowes, Inc.		19,774	$	59,718		0.6	%
Real Estate Investment Trusts (REITs)
Arbor Realty Trust, Inc.		38,357		582,259		6.0
Brandywine Realty Trust		12,820		58,203		0.6
Douglas Emmett, Inc.		18,512		236,213		2.4
SL Green Realty Corp.		20,326		758,160		7.7
				1,634,835
Net Value of Reference Entity — Goldman Sachs Bank USA			$	9,800,709

The following table represents the individual long positions and related values of the equity securities underlying the total return swap with HSBC Bank PLC as of period end, termination date 02/10/28:

Security	Shares		Value		% of Basket Value
Reference Entity — Long
Common Stocks
Alternative Energy
Green Plains, Inc.		37,004	$	1,113,820		16.3	%
Banks: Diversified
Atlantic Union Bankshares Corp.		6,177		177,774		2.6
Bancorp, Inc.		99		3,416		0.1
Banner Corp.		4,687		198,635		2.9
Berkshire Hills Bancorp, Inc.		4,810		96,440		1.4
Cadence Bank		12,727		270,067		4.0
Cathay General Bancorp		2,119		73,656		1.1
Community Bank System, Inc.		1,347		56,857		0.8
First BanCorp./Puerto Rico		30,461		410,005		6.0
First Bancorp/Southern Pines NC		3,100		87,234		1.3
First Commonwealth Financial Corp.		6,122		74,750		1.1
First Financial Bancorp		3,486		68,326		1.0
Hope Bancorp, Inc.		13,902		123,033		1.8
Independent Bank Corp.		4,710		231,214		3.4
Lakeland Financial Corp.		1,191		56,525		0.8
National Bank Holdings Corp., Class A		1,302		38,748		0.6
Pacific Premier Bancorp, Inc.		7,081		154,083		2.3
Preferred Bank/Los Angeles CA, Preference Shares		11,078		689,605		10.1
Provident Financial Services, Inc.		11,701		178,908		2.6
Renasant Corp.		3,169		82,996		1.2
S&T Bancorp, Inc.		303		8,205		0.1
Trustmark Corp.		4,744		103,087		1.5
United Community Banks, Inc., Series 16-2		1,142		29,018		0.4
Veritex Holdings, Inc.		3,858		69,251		1.0
Westamerica BanCorp.		3,608		156,046		2.3
				3,437,879
Banks: Savings, Thrift & Mortgage Lending
Washington Federal, Inc.		2,275		58,286		0.9
WSFS Financial Corp.		5,857		213,780		3.1
				272,066
Commercial Finance & Mortgage Companies
Pathward Financial, Inc.		849		39,130		0.6

22

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series

Security	Shares		Value		% of Basket Value
Computer Services Software & Systems
Envestnet, Inc.		8,424	$	370,909		5.4	%
Diversified Financial Services
Moelis & Co., Class A		1,027		46,349		0.7
Financial Data & Systems
Green Dot Corp., Class A		10,909		151,962		2.2
Insurance: Multi-Line
James River Group Holdings Ltd.		12,996		199,489		2.9
Insurance: Property-Casualty
Genworth Financial, Inc., Class A		54,421		318,907		4.7
ProAssurance Corp.		2,734		51,645		0.7
Radian Group, Inc.		11,138		279,675		4.1
Safety Insurance Group, Inc.		370		25,230		0.4
Stewart Information Services Corp.		53		2,322		0.0
				677,779
IT Services
Payoneer Global, Inc.		21,786		133,330		2.0
Office Supplies & Equipment
Pitney Bowes, Inc.		91,431		276,122		4.1
Real Estate Investment Trusts (REITs)
Douglas Emmett, Inc.		3,637		46,408		0.7
Utilities: Electrical
Avista Corp.		1,743		56,421		0.8
Net Value of Reference Entity — HSBC Bank PLC			$	6,821,664

The following table represents the individual long positions and related values of the equity securities underlying the total return swap with JPMorgan Chase Bank N.A. as of period end, termination date 02/08/24:

Security	Shares		Value		% of Basket Value
Reference Entity — Long
Common Stocks
Alternative Energy
Green Plains, Inc.		15,114	$	454,931		7.4	%
Banks: Diversified
Banc of California, Inc.		6,790		84,060		1.4

Security	Shares		Value		% of Basket Value
Banks: Diversified (continued)
BankUnited, Inc.		701	$	15,913		0.2	%
Cadence Bank		6,950		147,479		2.4
Central Pacific Financial Corp.		7,624		127,168		2.1
Eagle Bancorp, Inc.		3,219		69,048		1.1
First Bancorp/Southern Pines NC		4,048		113,911		1.8
Hanmi Financial Corp.		10,684		173,401		2.8
Independent Bank Corp.		876		43,003		0.7
National Bank Holdings Corp., Class A		7,304		217,367		3.5
Renasant Corp.		5,411		141,714		2.3
Seacoast Banking Corp. of Florida		491		10,782		0.2
TrustCo Bank Corp.		1,942		52,997		0.9
Veritex Holdings, Inc.		15,703		281,869		4.6
				1,478,712
Banks: Savings, Thrift & Mortgage Lending
Washington Federal, Inc.		62		1,589		0.0
Commercial Finance & Mortgage Companies
Pathward Financial, Inc.		2,678		123,429		2.0
Diversified Financial Services
Jackson Financial, Inc., Class A		6,812		260,355		4.2
Insurance: Multi-Line
Horace Mann Educators Corp.		5,047		148,281		2.4
Insurance: Property-Casualty
Employers Holdings, Inc., Series 2020		6,007		239,980		3.9
Genworth Financial, Inc., Class A		27,958		163,834		2.6
ProAssurance Corp.		10,653		201,235		3.3
Safety Insurance Group, Inc.		1,933		131,811		2.1
				736,860
IT Services
Bread Financial Holdings, Inc.		33,085		1,131,507		18.4
Media
Vimeo, Inc.		37,791		133,780		2.2
Real Estate Investment Trusts (REITs)
Douglas Emmett, Inc.		132,440		1,689,934		27.4
Utilities: Electrical
Avista Corp.		116		3,755		0.1
Net Value of Reference Entity — JPMorgan Chase Bank N.A.			$	6,163,133

Fair Value Hierarchy as of Period End

Various inputs are used in determining the fair value of financial instruments. These inputs to valuation techniques are categorized into a fair value hierarchy consisting of three broad levels for financial reporting purposes as follows:

• Level 1 – Unadjusted price quotations in active markets/exchanges for identical assets or liabilities that the Series has the ability to access;

• Level 2 – Other observable inputs (including, but not limited to, quoted prices for similar assets or liabilities in markets that are active, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the assets or liabilities (such as interest rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates) or other market–corroborated inputs); and

S E R I E S   S C H E D U L E   O F   I N V E S T M E N T S 23

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series

Fair Value Hierarchy as of Period End (continued)

• Level 3 – Unobservable inputs based on the best information available in the circumstances, to the extent observable inputs are not available (including the Valuation Committee’s assumptions used in determining the fair value of financial instruments).

The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). Accordingly, the degree of judgment exercised in determining fair value is greatest for instruments categorized in Level 3. The inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the fair value hierarchy classification is determined based on the lowest level input that is significant to the fair value measurement in its entirety. Investments classified within Level 3 have significant unobservable inputs used by the Valuation Committee in determining the price for Fair Valued Investments. Level 3 investments include equity or debt issued by privately held companies or funds. There may not be a secondary market, and/or there are a limited number of investors. The categorization of a value determined for financial instruments is based on the pricing transparency of the financial instruments and is not necessarily an indication of the risks associated with investing in those securities. For information about the Series’s policy regarding valuation of financial instruments, refer to its most recent financial statements.

The following table summarizes the Series’s financial instruments categorized in the fair value hierarchy. The breakdown of the Series’s financial instruments into major categories is disclosed in the Schedule of Investments above.

	Level 1		Level 2		Level 3		Total
Assets
Investments
Long-Term Investments
Common Stocks
Advertising Agencies	$	6,112,500	$	—	$	—	$	6,112,500
Aerospace		4,195,233		—		—		4,195,233
Aerospace & Defense		35,615,727		—		—		35,615,727
Agriculture, Fishing & Ranching		9,453,484		—		—		9,453,484
Air Transport		18,549,355		—		—		18,549,355
Airlines		294,825		—		—		294,825
Alternative Energy		20,248,714		—		—		20,248,714
Aluminum		2,818,909		—		—		2,818,909
Asset Management & Custodian		30,174,159		—		—		30,174,159
Auto Components		3,832,015		—		—		3,832,015
Auto Parts		40,480,337		—		—		40,480,337
Auto Services		6,226,597		—		—		6,226,597
Back Office Support, HR & Consulting		69,574,363		—		—		69,574,363
Banks		558,102		—		—		558,102
Banks: Diversified		303,333,894		—		—		303,333,894
Banks: Savings, Thrift & Mortgage Lending		19,185,077		—		—		19,185,077
Beverage: Soft Drinks		12,135,866		—		—		12,135,866
Biotechnology		268,095,274		—		—		268,095,274
Building Materials		40,682,062		—		—		40,682,062
Building Products		1,616,428		—		—		1,616,428
Building: Climate Control		17,588,156		—		—		17,588,156
Building: Roofing, Wallboard & Plumbing		9,430,816		—		—		9,430,816
Cable Television Services		3,953,340		—		—		3,953,340
Capital Markets		8,163,266		—		—		8,163,266
Casinos & Gambling		20,919,051		—		—		20,919,051
Cement		393,582		—		—		393,582
Chemicals		1,252,532		—		—		1,252,532
Chemicals: Diversified		34,070,379		—		—		34,070,379
Chemicals: Specialty		30,074,850		—		—		30,074,850
Coal		22,844,502		—		—		22,844,502
Commercial Banks		1,855,058		—		—		1,855,058
Commercial Finance & Mortgage Companies		12,348,283		—		—		12,348,283
Commercial Services & Supplies		8,027,276		—		—		8,027,276
Commercial Services: Rental & Leasing		33,918,104		—		7,769,018		41,687,122
Commercial Vehicles & Parts		14,610,832		—		—		14,610,832
Communications Equipment		1,238,651		—		—		1,238,651
Communications Technology		26,533,126		—		—		26,533,126
Computer Services Software & Systems		213,239,452		—		—		213,239,452
Computer Technology		42,780,460		—		—		42,780,460
Construction		20,280,399		—		—		20,280,399
Consumer Electronics		3,474,840		—		—		3,474,840
Consumer Finance		4,364,767		—		—		4,364,767
Consumer Lending		16,632,669		—		—		16,632,669
Consumer Services: Miscellaneous		15,260,717		—		—		15,260,717

24

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series

Fair Value Hierarchy as of Period End (continued)

	Level 1		Level 2		Level 3		Total
Common Stocks (continued)
Containers & Packaging	$	16,286,540	$	—	$	—	$	16,286,540
Cosmetics		14,813,608		—		—		14,813,608
Diversified Consumer Services		14,714,790		—		—		14,714,790
Diversified Financial Services		22,864,770		—		—		22,864,770
Diversified Manufacturing Operations		24,742,297		—		—		24,742,297
Diversified Materials & Processing		18,707,248		—		—		18,707,248
Diversified Media		580,551		—		—		580,551
Diversified Retail		12,374,782		—		—		12,374,782
Diversified Telecommunication Services		3,230,735		—		—		3,230,735
Drug & Grocery Store Chains		12,334,143		—		—		12,334,143
Education Services		27,682,693		—		—		27,682,693
Electrical Equipment		13,553,004		—		—		13,553,004
Electronic Components		32,294,358		—		—		32,294,358
Electronic Entertainment		691,547		—		—		691,547
Electronic Equipment, Instruments & Components		7,400,120		—		—		7,400,120
Electronics		13,219,542		—		—		13,219,542
Energy Equipment		40,793,945		—		—		40,793,945
Energy Equipment & Services		31,490,024		—		—		31,490,024
Engineering & Contracting Services		31,157,057		—		—		31,157,057
Entertainment		15,791,440		—		—		15,791,440
Environmental, Maintenance, & Security Service		19,980,666		—		—		19,980,666
Financial Data & Systems		15,194,738		—		—		15,194,738
Financial Services		12,036,685		—		—		12,036,685
Food & Staples Retailing		232,264		—		—		232,264
Food Products		6,013,035		—		—		6,013,035
Foods		43,655,794		—		—		43,655,794
Forest Products		18,224,915		—		—		18,224,915
Forms & Bulk Printing Services		2,700,018		—		—		2,700,018
Fruit & Grain Processing		2,976,013		—		—		2,976,013
Funeral Parlors & Cemeteries		7,940,265		—		—		7,940,265
Gas Pipeline		8,606,225		—		—		8,606,225
Glass		1,850,809		—		—		1,850,809
Gold		3,241,710		—		—		3,241,710
Health Care Equipment & Services		2,887,741		—		—		2,887,741
Health Care Equipment & Supplies		6,319,941		—		—		6,319,941
Health Care Facilities		26,254,327		—		—		26,254,327
Health Care Management Services		17,699,535		—		—		17,699,535
Health Care Providers & Services		1,690,388		—		—		1,690,388
Health Care Services		69,912,256		—		—		69,912,256
Home Building		50,162,037		—		—		50,162,037
Hotel/Motel		8,101,652		—		—		8,101,652
Hotels, Restaurants & Leisure		5,037,187		—		—		5,037,187
Household Appliances		682,467		—		—		682,467
Household Durables		3,191,620		—		—		3,191,620
Household Equipment & Products		20,042,748		—		—		20,042,748
Household Furnishings		7,785,747		—		—		7,785,747
Independent Power Producers & Energy Traders		1,690,990		—		—		1,690,990
Industrial Conglomerates		835,766		—		—		835,766
Insurance		11,838,286		—		—		11,838,286
Insurance: Life		16,247,601		—		—		16,247,601
Insurance: Multi-Line		16,770,244		—		—		16,770,244
Insurance: Property-Casualty		57,631,219		—		—		57,631,219
International Trade & Diversified Logistic		1,344,707		—		—		1,344,707
Internet & Catalog Retail		1,044,162		—		—		1,044,162
Internet Software & Services		15,026,547		—		—		15,026,547
IT Services		21,119,583		—		—		21,119,583
Leisure Time		30,600,491		—		—		30,600,491
Life Sciences Tools & Services		606,602		—		—		606,602
Luxury Items		7,105,013		—		—		7,105,013
Machinery		4,411,483		—		—		4,411,483
Machinery: Agricultural		15,049,401		—		—		15,049,401
Machinery: Construction & Handling		11,195,280		—		—		11,195,280
Machinery: Industrial		53,551,000		—		—		53,551,000

S E R I E S   S C H E D U L E   O F   I N V E S T M E N T S 25

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series

Fair Value Hierarchy as of Period End (continued)

	Level 1		Level 2		Level 3		Total
Common Stocks (continued)
Machinery: Specialty	$	4,802,949	$	—	$	—	$	4,802,949
Manufactured Housing		10,209,489		—		—		10,209,489
Marine		1,725,413		—		—		1,725,413
Media		7,158,288		—		—		7,158,288
Medical & Dental Instruments & Supplies		65,469,609		—		—		65,469,609
Medical Equipment		40,390,468		—		—		40,390,468
Medical Services		1,367,356		—		—		1,367,356
Metal Fabricating		20,143,183		—		—		20,143,183
Metals & Minerals: Diversified		41,248,911		—		—		41,248,911
Metals & Mining		1,174,252		—		—		1,174,252
Mining		1,650,980		—		—		1,650,980
Office Supplies & Equipment		9,950,887		—		—		9,950,887
Oil & Gas Producers		17,820,317		—		—		17,820,317
Oil Well Equipment & Services		60,450,227		—		—		60,450,227
Oil, Gas & Consumable Fuels		27,300,058		—		—		27,300,058
Oil: Crude Producers		97,019,602		—		—		97,019,602
Oil: Refining & Marketing		21,291,017		—		—		21,291,017
Paints & Coatings		8,624,518		—		—		8,624,518
Paper		2,618,305		—		—		2,618,305
Paper & Forest Products		2,845,906		—		—		2,845,906
Personal Care		23,018,458		—		—		23,018,458
Personal Products		2,459,526		—		—		2,459,526
Pharmaceuticals		81,063,572		136,551		—		81,200,123
Photography		707,342		—		—		707,342
Power Transmission Equipment		11,025,663		—		—		11,025,663
Printing & Copying Services		9,884,797		—		—		9,884,797
Producer Durables: Miscellaneous		1,845,083		—		—		1,845,083
Production Technology Equipment		34,515,211		—		—		34,515,211
Professional Services		8,784,187		—		—		8,784,187
Publishing		6,023,244		—		—		6,023,244
Radio & TV Broadcasters		7,253,486		—		—		7,253,486
Railroad Equipment		5,689,985		—		—		5,689,985
Real Estate		18,724,062		—		—		18,724,062
Real Estate Investment Trusts (REITs)		244,226,004		—		—		244,226,004
Real Estate Management & Development		8,516,757		—		—		8,516,757
Recreational Vehicles & Boats		12,620,024		—		—		12,620,024
Rental & Leasing Services: Consumer		2,887,366		—		—		2,887,366
Restaurants		33,460,712		—		—		33,460,712
Road & Rail		454,993		—		—		454,993
Scientific Instruments: Control & Filter		30,460,775		—		—		30,460,775
Scientific Instruments: Electrical		28,124,897		—		—		28,124,897
Scientific Instruments: Gauges & Meters		15,971,706		—		—		15,971,706
Scientific Instruments: Pollution Control		2,266,070		—		—		2,266,070
Securities Brokerage & Services		3,080,408		—		—		3,080,408
Semiconductors & Components		72,614,033		—		—		72,614,033
Semiconductors & Semiconductor Equipment		11,593,154		—		—		11,593,154
Shipping		38,482,461		—		—		38,482,461
Software		53,748,564		—		—		53,748,564
Specialty Retail		83,325,349		—		—		83,325,349
Steel		21,581,555		—		—		21,581,555
Technology Hardware & Equipment		7,761,125		—		—		7,761,125
Technology: Miscellaneous		20,588,336		—		—		20,588,336
Telecommunications Equipment		6,880,287		—		—		6,880,287
Textile Products		1,000,404		—		—		1,000,404
Textiles Apparel & Shoes		17,597,340		—		—		17,597,340
Textiles, Apparel & Luxury Goods		175,492		—		—		175,492
Toys		463,077		—		—		463,077
Trading Companies & Distributors		1,036,974		—		—		1,036,974
Transportation Miscellaneous		8,000,392		—		—		8,000,392
Truckers		22,012,302		—		—		22,012,302
Utilities: Electrical		46,419,348		—		—		46,419,348
Utilities: Gas Distributors		24,588,151		—		—		24,588,151
Utilities: Miscellaneous		12,890,606		—		—		12,890,606

26

Schedule of Investments (unaudited) (continued) September 30, 2023 Master Small Cap Index Series

Fair Value Hierarchy as of Period End (continued)

	Level 1			Level 2			Level 3		Total
Common Stocks (continued)
Utilities: Telecommunications	$	20,274,880		$	—		$	—	$	20,274,880
Utilities: Water		18,480,781			—			—		18,480,781
Investment Companies		25,824,542			—			—		25,824,542
Rights		—			—			99,829		99,829
Short-Term Securities
Money Market Funds		360,713,020			—			—		360,713,020
	$	4,352,028,617		$	136,551		$	7,868,847	$	4,360,034,015
Derivative Financial Instruments(a)
Liabilities
Equity Contracts	$	(362,664	)	$	(554,433	)	$	—	$	(917,097	)

^(a)  Derivative financial instruments are swaps and futures contracts. Swaps and futures contracts are valued at the unrealized appreciation (depreciation) on the instrument.

Portfolio Abbreviation
CPI	Consumer Price Index
CVR	Contingent Value Right
ETF	Exchange-Traded Fund
REIT	Real Estate Investment Trust

S E R I E S   S C H E D U L E   O F   I N V E S T M E N T S 27