MML Asset Momentum Fund — Portfolio of Investments

September 30, 2020 (Unaudited)

	Number of Shares		Value
Equities — 23.5%
Common Stock — 23.5%
Communications — 2.0%
Internet — 0.8%
Rightmove PLC		35,000	$	281,720
Media — 0.6%
Fox Corp. Class A		8,000		222,640
Telecommunications — 0.6%
NTT DOCOMO, Inc. (a)		5,600		207,673
				712,033
Consumer, Cyclical — 4.7%
Distribution & Wholesale — 4.7%
Pool Corp.		5,100		1,706,154
Consumer, Non-cyclical — 1.7%
Health Care – Products — 0.4%
Advanced Medical Solutions Group PLC		54,682		152,258
Health Care – Services — 0.7%
Fresenius SE & Co. KGaA		5,900		268,565
Household Products & Wares — 0.6%
Henkel AG & Co. KGaA		2,000		187,336
Portmeirion Group PLC (b)		5,600		30,716
				218,052
				638,875
Energy — 0.8%
Oil & Gas — 0.8%
Marathon Petroleum Corp.		10,000		293,400
Financial — 6.1%
Diversified Financial Services — 6.1%
Mastercard, Inc. Class A		5,300		1,792,301
Visa, Inc. Class A		2,200		439,934
				2,232,235

MML Asset Momentum Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Industrial — 4.4%
Building Materials — 0.2%
Breedon Group PLC (b)		88,437	$	81,019
Electronics — 2.7%
Halma PLC		17,600		530,471
Roper Technologies, Inc.		1,100		434,621
				965,092
Hand & Machine Tools — 0.5%
Schindler Holding AG		700		191,124
Machinery – Diversified — 1.0%
Keyence Corp.		800		372,834
				1,610,069
Technology — 3.8%
Computers — 2.9%
Fortinet, Inc. (b)		8,800		1,036,728
Software — 0.9%
EMIS Group PLC		11,800		158,482
Nexus AG		3,400		183,376
				341,858
				1,378,586
TOTAL COMMON STOCK                                                                                 (Cost $5,569,155)				8,571,352
TOTAL EQUITIES (Cost $5,569,155)				8,571,352

	Principal Amount
Bonds & Notes — 24.9%
U.S. Treasury Obligations — 24.9%
U.S. Treasury Bonds & Notes — 24.9%
U.S. Treasury Note
1.250% 3/31/21 (c)	$	6,000,000	6,033,886
1.250% 10/31/21		3,000,000	3,036,126
			9,070,012
TOTAL U.S. TREASURY OBLIGATIONS (Cost $9,008,008)			9,070,012
TOTAL BONDS & NOTES (Cost $9,008,008)			9,070,012

MML Asset Momentum Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Mutual Funds — 48.4%
Diversified Financial Services — 48.4%
iShares MSCI Brazil ETF (a)		36,000	$	995,760
iShares MSCI India ETF (a)		6,600		223,476
iShares MSCI Mexico ETF (a)		17,000		567,120
State Street Navigator Securities Lending Prime Portfolio (d)		4,331,305		4,331,305
Vanguard Short-Term Bond ETF (a)		93,000		7,723,650
Vanguard Total Stock Market ETF (a)		22,200		3,780,882
				17,622,193
TOTAL MUTUAL FUNDS  (Cost $17,108,704)				17,622,193
TOTAL LONG-TERM INVESTMENTS (Cost $31,685,867)				35,263,557

	Principal Amount
Short-Term Investments — 14.8%
Repurchase Agreement — 14.8%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/20, 0.000%, due 10/01/20 (e)	$	5,383,393		5,383,393
TOTAL SHORT-TERM INVESTMENTS (Cost $5,383,393)				5,383,393
TOTAL INVESTMENTS — 111.6% (Cost $37,069,260) (f)				40,646,950
Other Assets/(Liabilities) — (11.6)%				(4,222,786	)
NET ASSETS — 100.0%			$	36,424,164

Abbreviation Legend
ETF	Exchange-Traded Fund

Notes to Portfolio of Investments
Percentages are stated as a percent of net assets. 

(a)	Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2020, was $5,655,666 or 15.53% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $1,429,413 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments.  (Note 2).
(b)	Non-income producing security.
(c)	A portion of this security is pledged/held as collateral for open derivatives.
(d)	Represents investment of security lending cash collateral. (Note 2).
(e)	Maturity value of $5,383,393. Collateralized by U.S. Government Agency obligations with a rate of 2.375%, maturity date of 3/15/22, and an aggregate market value, including accrued interest, of $5,491,110.
(f)	See Note 3 for aggregate cost for federal tax purposes.

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/ Net Unrealized Appreciation/ (Depreciation)
Long
Nasdaq 100 E Mini Index	12/18/20		16	$	3,641,612	$	8,708
S&P 500 E Mini Index	12/18/20		111		18,813,975		(210,375	)
						$	(201,667	)

MML Blend Fund — Portfolio of Investments

September 30, 2020 (Unaudited)

	Number of Shares		Value
Equities — 66.2%
Common Stock — 66.1%
Basic Materials — 1.3%
Chemicals — 0.9%
Air Products & Chemicals, Inc.		355	$	105,740
Celanese Corp.		6,100		655,445
CF Industries Holdings, Inc.		15,290		469,556
Dow, Inc.		5,106		240,237
DuPont de Nemours, Inc.		3,506		194,513
Eastman Chemical Co.		6,370		497,624
Ecolab, Inc.		2		400
FMC Corp.		3,700		391,867
International Flavors & Fragrances, Inc.		160		19,592
Linde PLC		866		206,221
LyondellBasell Industries NV Class A		14,140		996,729
The Mosaic Co.		1,500		27,405
PPG Industries, Inc.		9,418		1,149,749
The Sherwin-Williams Co.		2,523		1,757,875
				6,712,953
Forest Products & Paper — 0.2%
International Paper Co.		23,687		960,271
Iron & Steel — 0.0%
Nucor Corp.		3,056		137,092
Mining — 0.2%
Freeport-McMoRan, Inc.		3,864		60,433
Newmont Corp.		25,170		1,597,037
				1,657,470
				9,467,786
Communications — 11.5%
Advertising — 0.1%
The Interpublic Group of Cos., Inc.		22,122		368,774
Omnicom Group, Inc.		8,147		403,276
				772,050
Internet — 8.4%
Alphabet, Inc. Class A (a)		6,120		8,969,472
Alphabet, Inc. Class C (a)		5,221		7,672,782
Amazon.com, Inc. (a)		7,110		22,387,470
Booking Holdings, Inc. (a)		1,511		2,584,837
CDW Corp.		3,930		469,753
E*TRADE Financial Corp.		5,561		278,328
eBay, Inc.		30,377		1,582,642

MML Blend Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Expedia Group, Inc.		377	$	34,567
F5 Networks, Inc. (a)		1,400		171,878
Facebook, Inc. Class A (a)		54,850		14,365,215
Netflix, Inc. (a)		2,783		1,391,584
NortonLifeLock, Inc.		17,955		374,182
Twitter, Inc. (a)		1,300		57,850
VeriSign, Inc. (a)		3,431		702,840
				61,043,400
Media — 0.9%
Charter Communications, Inc. Class A (a)		2,031		1,268,035
Comcast Corp. Class A		79,024		3,655,650
Discovery, Inc. Class A (a) (b)		7,700		167,629
Discovery, Inc. Class C (a)		9,043		177,243
DISH Network Corp. Class A (a)		6,600		191,598
Fox Corp. Class A		14,622		406,930
Fox Corp. Class B (a)		2,700		75,519
News Corp. Class A		866		12,141
News Corp. Class B		300		4,194
ViacomCBS, Inc. Class B (b)		4,843		135,653
The Walt Disney Co.		5,066		628,589
				6,723,181
Telecommunications — 2.1%
Arista Networks, Inc. (a)		1,530		316,603
AT&T, Inc.		63,926		1,822,530
CenturyLink, Inc.		27,928		281,794
Cisco Systems, Inc.		133,542		5,260,219
Corning, Inc.		8,167		264,692
Juniper Networks, Inc.		7,289		156,714
Motorola Solutions, Inc.		2,557		400,963
T-Mobile US, Inc. (a)		3,250		371,670
Verizon Communications, Inc.		111,355		6,624,509
				15,499,694
				84,038,325
Consumer, Cyclical — 5.7%
Airlines — 0.1%
Alaska Air Group, Inc.		300		10,989
American Airlines Group, Inc. (b)		2,200		27,038
Delta Air Lines, Inc.		10,600		324,148
Southwest Airlines Co.		10,383		389,363
United Airlines Holdings, Inc. (a)		1,500		52,125
				803,663
Apparel — 0.5%
Hanesbrands, Inc.		25,500		401,625
NIKE, Inc. Class B		20,874		2,620,522
PVH Corp.		1,620		96,617
Ralph Lauren Corp.		2,960		201,191
Tapestry, Inc.		6,220		97,219
Under Armour, Inc. Class A (a)		200		2,246
Under Armour, Inc. Class C (a)		300		2,952

MML Blend Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
VF Corp.		2,200	$	154,550
				3,576,922
Auto Manufacturers — 0.4%
Cummins, Inc.		6,565		1,386,265
Ford Motor Co.		30,013		199,887
General Motors Co.		26,200		775,258
PACCAR, Inc.		4,822		411,220
				2,772,630
Auto Parts & Equipment — 0.0%
BorgWarner, Inc.		4,800		185,952
Distribution & Wholesale — 0.2%
Copart, Inc. (a)		4,400		462,704
Fastenal Co.		9,264		417,714
W.W. Grainger, Inc.		1,072		382,457
				1,262,875
Entertainment — 0.0%
Live Nation Entertainment, Inc. (a)		200		10,776
Home Builders — 0.2%
D.R. Horton, Inc.		4,747		359,016
Lennar Corp. Class A		9,200		751,456
NVR, Inc. (a)		70		285,818
PulteGroup, Inc.		5,873		271,861
				1,668,151
Home Furnishing — 0.1%
Leggett & Platt, Inc.		86		3,541
Whirlpool Corp.		1,353		248,803
				252,344
Housewares — 0.0%
Newell Brands, Inc.		4,600		78,936
Leisure Time — 0.0%
Harley-Davidson, Inc.		3,302		81,031
Norwegian Cruise Line Holdings Ltd. (a) (b)		1,100		18,821
Royal Caribbean Cruises Ltd.		610		39,485
				139,337
Lodging — 0.3%
Hilton Worldwide Holdings, Inc.		14,700		1,254,204
Las Vegas Sands Corp.		9,000		419,940
Marriott International, Inc. Class A		6,081		562,979
Wynn Resorts Ltd.		8		574
				2,237,697
Retail — 3.9%
Advance Auto Parts, Inc.		1,010		155,035
AutoZone, Inc. (a)		464		546,425
Best Buy Co., Inc.		6,292		700,237

MML Blend Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
CarMax, Inc. (a)		400	$	36,764
Chipotle Mexican Grill, Inc. (a)		250		310,928
Costco Wholesale Corp.		1,890		670,950
Darden Restaurants, Inc.		2,654		267,364
Dollar General Corp.		6,770		1,419,127
Dollar Tree, Inc. (a)		2,548		232,734
Domino's Pizza, Inc.		2,230		948,374
The Gap, Inc.		690		11,751
Genuine Parts Co.		364		34,642
The Home Depot, Inc.		30,047		8,344,352
Kohl's Corp.		8,530		158,061
L Brands, Inc.		2,200		69,982
Lowe's Cos., Inc.		32,745		5,431,086
McDonald's Corp.		1,310		287,532
Nordstrom, Inc. (b)		10,308		122,871
O'Reilly Automotive, Inc. (a)		2,663		1,227,856
Ross Stores, Inc.		1,204		112,357
Starbucks Corp.		7,954		683,408
Target Corp.		10,096		1,589,312
Tiffany & Co.		802		92,912
The TJX Cos., Inc.		4,612		256,658
Tractor Supply Co.		3,310		474,455
Walgreens Boots Alliance, Inc.		4,057		145,727
Walmart, Inc.		22,312		3,121,672
Yum! Brands, Inc.		10,275		938,108
				28,390,680
Toys, Games & Hobbies — 0.0%
Hasbro, Inc.		2,791		230,872
				41,610,835
Consumer, Non-cyclical — 14.4%
Agriculture — 1.0%
Altria Group, Inc.		76,459		2,954,376
Archer-Daniels-Midland Co.		792		36,820
Philip Morris International, Inc.		57,286		4,295,877
				7,287,073
Beverages — 1.0%
Brown-Forman Corp. Class B		15		1,130
The Coca-Cola Co.		60,630		2,993,303
Constellation Brands, Inc. Class A		542		102,714
Molson Coors Beverage Co. Class B		1,500		50,340
Monster Beverage Corp. (a)		8,400		673,680
PepsiCo, Inc.		24,730		3,427,578
				7,248,745
Biotechnology — 2.0%
Alexion Pharmaceuticals, Inc. (a)		7,560		865,091
Amgen, Inc.		20,001		5,083,454
Biogen, Inc. (a)		7,762		2,201,924
Corteva, Inc.		2,706		77,960
Gilead Sciences, Inc.		43,810		2,768,354
Illumina, Inc. (a)		210		64,907
Incyte Corp. (a)		260		23,332

MML Blend Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Regeneron Pharmaceuticals, Inc. (a)		2,730	$	1,528,200
Vertex Pharmaceuticals, Inc. (a)		7,250		1,972,870
				14,586,092
Commercial Services — 1.1%
Automatic Data Processing, Inc.		7,259		1,012,558
Cintas Corp.		2,378		791,470
Equifax, Inc.		182		28,556
FleetCor Technologies, Inc. (a)		1,320		314,292
Gartner, Inc. (a)		110		13,744
Global Payments, Inc.		1,132		201,021
H&R Block, Inc. (b)		16,263		264,924
IHS Markit Ltd.		6,500		510,315
MarketAxess Holdings, Inc.		430		207,084
Moody's Corp.		2,670		773,899
Nielsen Holdings PLC		3,400		48,212
PayPal Holdings, Inc. (a)		2,257		444,697
Quanta Services, Inc.		2,013		106,407
Robert Half International, Inc.		10,526		557,246
S&P Global, Inc.		5,788		2,087,153
United Rentals, Inc. (a)		3,250		567,125
Verisk Analytics, Inc.		2,720		504,043
				8,432,746
Cosmetics & Personal Care — 1.0%
Colgate-Palmolive Co.		31,806		2,453,833
Coty, Inc. Class A		900		2,430
The Estee Lauder Cos., Inc. Class A		1,570		342,653
The Procter & Gamble Co.		34,959		4,858,951
				7,657,867
Foods — 0.7%
Campbell Soup Co.		4,424		213,989
Conagra Brands, Inc.		7,774		277,610
General Mills, Inc.		19,062		1,175,744
The Hershey Co.		3,667		525,628
Hormel Foods Corp.		3,232		158,012
The J.M. Smucker Co.		845		97,614
Kellogg Co.		4,528		292,464
The Kraft Heinz Co.		4,958		148,492
The Kroger Co.		27,858		944,665
Lamb Weston Holdings, Inc.		4,700		311,469
McCormick & Co., Inc.		1,411		273,875
Mondelez International, Inc. Class A		2,275		130,699
Sysco Corp.		6,534		406,545
Tyson Foods, Inc. Class A		501		29,799
				4,986,605
Health Care – Products — 0.9%
Abbott Laboratories		5,901		642,206
Align Technology, Inc. (a)		340		111,302
Baxter International, Inc.		3,661		294,418
The Cooper Cos., Inc.		80		26,970
Danaher Corp.		936		201,549
Dentsply Sirona, Inc.		56		2,449
Edwards Lifesciences Corp. (a)		10,750		858,065

MML Blend Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Henry Schein, Inc. (a)		500	$	29,390
IDEXX Laboratories, Inc. (a)		1,100		432,421
Intuitive Surgical, Inc. (a)		428		303,683
Medtronic PLC		2,300		239,016
ResMed, Inc.		2,160		370,289
Stryker Corp.		4,180		870,986
Teleflex, Inc.		60		20,425
Thermo Fisher Scientific, Inc.		3,541		1,563,422
Varian Medical Systems, Inc. (a)		7		1,204
West Pharmaceutical Services, Inc.		1,030		283,147
Zimmer Biomet Holdings, Inc.		5		681
				6,251,623
Health Care – Services — 1.3%
Anthem, Inc.		4,626		1,242,497
Centene Corp. (a)		920		53,664
DaVita, Inc. (a)		5,730		490,775
HCA Healthcare, Inc.		6,880		857,798
Humana, Inc.		3,144		1,301,270
Laboratory Corp. of America Holdings (a)		2		377
Quest Diagnostics, Inc.		209		23,928
UnitedHealth Group, Inc.		16,684		5,201,571
Universal Health Services, Inc. Class B		50		5,351
				9,177,231
Household Products & Wares — 0.5%
Avery Dennison Corp.		1,915		244,814
Church & Dwight Co., Inc.		3,400		318,614
The Clorox Co.		4,583		963,209
Kimberly-Clark Corp.		12,275		1,812,526
				3,339,163
Pharmaceuticals — 4.9%
AbbVie, Inc.		60,753		5,321,355
AmerisourceBergen Corp.		2,507		242,979
Becton Dickinson and Co.		1,602		372,753
Bristol-Myers Squibb Co.		72,043		4,343,473
Cardinal Health, Inc.		5,978		280,667
Cigna Corp.		5,593		947,510
CVS Health Corp.		27,101		1,582,698
Eli Lilly and Co.		26,484		3,920,162
Johnson & Johnson		49,892		7,427,921
McKesson Corp.		4,095		609,868
Merck & Co., Inc.		46,283		3,839,175
Mylan NV (a)		18,547		275,052
Pfizer, Inc.		152,641		5,601,925
Zoetis, Inc.		8,720		1,442,026
				36,207,564
				105,174,709
Energy — 1.1%
Oil & Gas — 0.9%
Apache Corp.		1,521		14,404
Cabot Oil & Gas Corp.		31,048		538,993

MML Blend Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Chevron Corp.		26,938	$	1,939,536
Concho Resources, Inc.		700		30,884
ConocoPhillips		34,039		1,117,841
Devon Energy Corp.		6,447		60,989
Diamondback Energy, Inc.		2,460		74,095
EOG Resources, Inc.		18,078		649,723
Exxon Mobil Corp.		26,897		923,374
Hess Corp.		3,032		124,100
HollyFrontier Corp.		8,900		175,419
Marathon Oil Corp.		7,327		29,967
Marathon Petroleum Corp.		4,900		143,766
Noble Energy, Inc.		1,256		10,739
Occidental Petroleum Corp.		3,629		36,326
Phillips 66		15,379		797,247
Pioneer Natural Resources Co.		1		86
Valero Energy Corp.		4,040		175,013
				6,842,502
Oil & Gas Services — 0.1%
Baker Hughes Co.		31		412
Halliburton Co.		16,867		203,247
National Oilwell Varco, Inc.		1,094		9,912
Schlumberger NV		17,631		274,338
TechnipFMC PLC		40		253
				488,162
Pipelines — 0.1%
Kinder Morgan, Inc.		14,438		178,021
The Williams Cos., Inc.		42,048		826,243
				1,004,264
				8,334,928
Financial — 8.9%
Banks — 2.6%
Bank of America Corp.		147,898		3,562,863
The Bank of New York Mellon Corp.		27,707		951,458
Citigroup, Inc.		33,551		1,446,384
Citizens Financial Group, Inc.		5,900		149,152
Comerica, Inc.		5,821		222,653
Fifth Third Bancorp		11,821		252,024
The Goldman Sachs Group, Inc.		4,880		980,734
Huntington Bancshares, Inc.		6,800		62,356
JP Morgan Chase & Co.		62,732		6,039,210
KeyCorp		8,664		103,361
M&T Bank Corp.		2,545		234,369
Morgan Stanley		16,397		792,795
Northern Trust Corp.		3,459		269,698
The PNC Financial Services Group, Inc.		11,408		1,253,853
Regions Financial Corp.		26,715		308,024
State Street Corp.		11,276		669,005
SVB Financial Group (a)		480		115,498
Truist Financial Corp.		6,944		264,219
US Bancorp		24,402		874,812
Wells Fargo & Co.		34,516		811,471

MML Blend Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Zions Bancorp NA		2,041	$	59,638
				19,423,577
Diversified Financial Services — 3.1%
Alliance Data Systems Corp.		6,280		263,634
American Express Co.		11,739		1,176,835
Ameriprise Financial, Inc.		5,266		811,543
BlackRock, Inc.		1,450		817,148
Capital One Financial Corp.		3,552		255,247
The Charles Schwab Corp.		18,912		685,182
CME Group, Inc.		1,840		307,850
Discover Financial Services		8,583		495,926
Franklin Resources, Inc.		5,387		109,625
Intercontinental Exchange, Inc.		8,715		871,936
Invesco Ltd.		14,412		164,441
Jefferies Financial Group, Inc.		37		666
Mastercard, Inc. Class A		25,020		8,461,013
Nasdaq, Inc.		45		5,522
Raymond James Financial, Inc.		3,900		283,764
Synchrony Financial		25,900		677,803
T. Rowe Price Group, Inc.		4,706		603,403
Visa, Inc. Class A		30,562		6,111,483
The Western Union Co.		21,188		454,059
				22,557,080
Insurance — 1.8%
Aflac, Inc.		14,844		539,579
The Allstate Corp.		11,535		1,085,905
American International Group, Inc.		11,446		315,108
Aon PLC Class A		1,795		370,309
Assurant, Inc.		96		11,646
Berkshire Hathaway, Inc. Class B (a)		25,526		5,435,507
Chubb Ltd.		1,108		128,661
Cincinnati Financial Corp.		39		3,041
Everest Re Group Ltd.		20		3,951
Globe Life, Inc.		3,282		262,232
The Hartford Financial Services Group, Inc.		5,152		189,903
Lincoln National Corp.		6,951		217,775
Loews Corp.		783		27,209
Marsh & McLennan Cos., Inc.		1,103		126,514
MetLife, Inc.		29,190		1,084,992
Principal Financial Group, Inc.		8,129		327,355
The Progressive Corp.		19,514		1,847,390
Prudential Financial, Inc.		8,037		510,510
The Travelers Cos., Inc.		4,097		443,254
Unum Group		8,731		146,943
				13,077,784
Real Estate — 0.1%
CBRE Group, Inc. Class A (a)		8,087		379,846
Real Estate Investment Trusts (REITS) — 1.3%
Alexandria Real Estate Equities, Inc.		120		19,200
American Tower Corp.		10,749		2,598,356
Apartment Investment and Management Co. Class A		82		2,765
AvalonBay Communities, Inc.		2,081		310,777

MML Blend Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Boston Properties, Inc.		3,793	$	304,578
Crown Castle International Corp.		1,690		281,385
Digital Realty Trust, Inc.		280		41,093
Duke Realty Corp.		9,000		332,100
Equinix, Inc.		610		463,679
Equity Residential		8,356		428,913
Essex Property Trust, Inc.		1,580		317,248
Extra Space Storage, Inc.		1,190		127,318
Healthpeak Properties, Inc.		935		25,385
Host Hotels & Resorts, Inc.		10,737		115,852
Iron Mountain, Inc. (b)		9,748		261,149
Kimco Realty Corp.		13,567		152,764
Mid-America Apartment Communities, Inc.		2,190		253,931
Prologis, Inc.		12,938		1,301,822
Public Storage		1,693		377,065
Realty Income Corp.		700		42,525
Regency Centers Corp.		3,900		148,278
Simon Property Group, Inc.		13,605		879,971
SL Green Realty Corp. (b)		4,490		208,201
UDR, Inc.		200		6,522
Ventas, Inc.		8,225		345,121
Vornado Realty Trust		6,973		235,060
Welltower, Inc.		3,000		165,270
Weyerhaeuser Co.		26		742
				9,747,070
Savings & Loans — 0.0%
People's United Financial, Inc.		1,751		18,053
				65,203,410
Industrial — 5.0%
Aerospace & Defense — 1.0%
The Boeing Co.		2,052		339,113
General Dynamics Corp.		3,032		419,720
Howmet Aerospace, Inc.		5,408		90,422
L3 Harris Technologies, Inc.		1,161		197,184
Lockheed Martin Corp.		10,510		4,028,273
Northrop Grumman Corp.		2,638		832,263
Raytheon Technologies Corp.		14,318		823,858
TransDigm Group, Inc.		1,080		513,129
				7,243,962
Building Materials — 0.2%
Carrier Global Corp.		28,493		870,176
Johnson Controls International PLC		2,565		104,780
Masco Corp.		10,125		558,191
Vulcan Materials Co.		5		678
				1,533,825
Electrical Components & Equipment — 0.2%
AMETEK, Inc.		2,500		248,500
Emerson Electric Co.		18,569		1,217,569
				1,466,069

MML Blend Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Electronics — 0.7%
Agilent Technologies, Inc.		3,063	$	309,179
Allegion PLC		1,633		161,520
Amphenol Corp. Class A		474		51,320
FLIR Systems, Inc.		2,852		102,244
Fortive Corp.		478		36,429
Garmin Ltd.		2,100		199,206
Honeywell International, Inc.		13,052		2,148,490
Keysight Technologies, Inc. (a)		4,500		444,510
Mettler-Toledo International, Inc. (a)		760		733,970
PerkinElmer, Inc.		20		2,510
Roper Technologies, Inc.		663		261,958
TE Connectivity Ltd.		2,000		195,480
Waters Corp. (a)		1,540		301,347
				4,948,163
Engineering & Construction — 0.0%
Jacobs Engineering Group, Inc.		820		76,071
Environmental Controls — 0.1%
Pentair PLC		2,523		115,478
Republic Services, Inc.		337		31,459
Waste Management, Inc.		6,903		781,212
				928,149
Hand & Machine Tools — 0.0%
Snap-on, Inc.		1,171		172,289
Stanley Black & Decker, Inc.		9		1,460
				173,749
Machinery – Construction & Mining — 0.2%
Caterpillar, Inc.		10,105		1,507,161
Machinery – Diversified — 0.3%
Dover Corp.		1,303		141,167
Flowserve Corp.		1,870		51,032
Ingersoll Rand, Inc. (a)		544		19,367
Otis Worldwide Corp.		14,046		876,751
Rockwell Automation, Inc.		4,953		1,093,028
Westinghouse Air Brake Technologies Corp.		500		30,940
Xylem, Inc.		55		4,627
				2,216,912
Miscellaneous - Manufacturing — 0.9%
3M Co.		15,432		2,471,898
Eaton Corp. PLC		7,366		751,553
General Electric Co.		20,786		129,497
Illinois Tool Works, Inc.		10,365		2,002,622
Parker-Hannifin Corp.		2,268		458,907
Textron, Inc.		3,372		121,695
Trane Technologies PLC		4,090		495,912
				6,432,084
Packaging & Containers — 0.2%
Amcor PLC		27,900		308,295

MML Blend Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Ball Corp.		504	$	41,892
Packaging Corp. of America		4,350		474,368
Sealed Air Corp.		53		2,057
WestRock Co.		7,467		259,404
				1,086,016
Shipbuilding — 0.0%
Huntington Ingalls Industries, Inc.		1,110		156,233
Transportation — 1.2%
C.H. Robinson Worldwide, Inc.		2,520		257,519
CSX Corp.		19,807		1,538,410
Expeditors International of Washington, Inc.		4,626		418,745
Kansas City Southern		1,740		314,644
Norfolk Southern Corp.		3,643		779,566
Old Dominion Freight Line, Inc.		1,840		332,893
Union Pacific Corp.		15,132		2,979,037
United Parcel Service, Inc. Class B		15,040		2,506,115
				9,126,929
				36,895,323
Technology — 16.6%
Computers — 5.6%
Accenture PLC Class A		11,540		2,607,925
Apple, Inc.		286,068		33,129,535
Cognizant Technology Solutions Corp. Class A		8,856		614,784
DXC Technology Co.		7,579		135,285
Fortinet, Inc. (a)		5,790		682,120
Hewlett Packard Enterprise Co.		10,074		94,393
HP, Inc.		44,074		836,965
International Business Machines Corp.		16,840		2,048,923
Leidos Holdings, Inc.		600		53,490
NetApp, Inc.		9,598		420,776
Seagate Technology PLC		8,700		428,649
Western Digital Corp.		547		19,993
				41,072,838
Office & Business Equipment — 0.1%
Xerox Holdings Corp.		5,736		107,665
Zebra Technologies Corp. Class A (a)		1,120		282,755
				390,420
Semiconductors — 4.1%
Advanced Micro Devices, Inc. (a)		11,000		901,890
Analog Devices, Inc.		1,072		125,145
Applied Materials, Inc.		24,539		1,458,844
Broadcom, Inc.		5,469		1,992,466
Intel Corp.		118,223		6,121,587
IPG Photonics Corp. (a)		50		8,499
KLA Corp.		5,439		1,053,752
Lam Research Corp.		6,183		2,051,210
Maxim Integrated Products, Inc.		6,600		446,226
Microchip Technology, Inc.		2,261		232,340
Micron Technology, Inc. (a)		15,417		723,982

MML Blend Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
NVIDIA Corp.		9,966	$	5,393,799
QUALCOMM, Inc.		36,730		4,322,386
Skyworks Solutions, Inc.		2,840		413,220
Texas Instruments, Inc.		32,344		4,618,400
Xilinx, Inc.		5,996		625,023
				30,488,769
Software — 6.8%
Activision Blizzard, Inc.		14,400		1,165,680
Adobe, Inc. (a)		11,200		5,492,816
Akamai Technologies, Inc. (a)		2,026		223,954
Autodesk, Inc. (a)		2,317		535,250
Broadridge Financial Solutions, Inc.		720		95,040
Cadence Design Systems, Inc. (a)		8,700		927,681
Cerner Corp.		4,300		310,847
Citrix Systems, Inc.		3,167		436,127
Electronic Arts, Inc. (a)		10,877		1,418,469
Fidelity National Information Services, Inc.		900		132,489
Fiserv, Inc. (a)		802		82,646
Intuit, Inc.		6,190		2,019,240
Jack Henry & Associates, Inc.		1,940		315,425
Microsoft Corp.		142,685		30,010,936
MSCI, Inc.		770		274,721
Oracle Corp.		71,757		4,283,893
Paychex, Inc.		5,864		467,771
salesforce.com, Inc. (a)		1,024		257,352
ServiceNow, Inc. (a)		1,570		761,450
Synopsys, Inc. (a)		2,630		562,767
				49,774,554
				121,726,581
Utilities — 1.6%
Electric — 1.6%
AES Corp.		13,387		242,438
Alliant Energy Corp.		5,400		278,910
Ameren Corp.		460		36,377
American Electric Power Co., Inc.		2,485		203,099
CenterPoint Energy, Inc.		4,131		79,935
CMS Energy Corp.		1,103		67,735
Consolidated Edison, Inc.		1,282		99,740
Dominion Energy, Inc.		1,347		106,319
DTE Energy Co.		310		35,662
Duke Energy Corp.		10,290		911,282
Edison International		826		41,994
Entergy Corp.		848		83,553
Evergy, Inc.		15,200		772,464
Eversource Energy		812		67,843
Exelon Corp.		22,140		791,726
FirstEnergy Corp.		11,080		318,107
NextEra Energy, Inc.		710		197,068
NRG Energy, Inc.		38,600		1,186,564
Pinnacle West Capital Corp.		1,396		104,072
PPL Corp.		44,318		1,205,893
Public Service Enterprise Group, Inc.		9,924		544,927
Sempra Energy		11,421		1,351,789
The Southern Co.		44,522		2,413,983

MML Blend Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
WEC Energy Group, Inc.		542	$	52,520
Xcel Energy, Inc.		2,172		149,890
				11,343,890
Gas — 0.0%
NiSource, Inc.		713		15,686
Water — 0.0%
American Water Works Co., Inc.		380		55,054
				11,414,630
TOTAL COMMON STOCK (Cost $315,452,940)				483,866,527
Preferred Stock — 0.1%
Financial — 0.1%
Insurance — 0.1%
The Allstate Corp., 3 mo. USD LIBOR + 3.165%
5.100% VRN 1/15/53		20,000		519,400
TOTAL PREFERRED STOCK (Cost $500,000)				519,400
TOTAL EQUITIES   (Cost $315,952,940)				484,385,927

	Principal Amount
Bonds & Notes — 33.6%
Corporate Debt — 13.7%
Aerospace & Defense — 0.0%
Raytheon Technologies Corp.
4.500% 6/01/42	$	150,000	189,380
6.125% 7/15/38		80,000	114,872
			304,252
Agriculture — 0.3%
BAT Capital Corp.
2.259% 3/25/28		175,000	175,868
4.700% 4/02/27		225,000	258,127
4.758% 9/06/49		110,000	119,466
Bunge Ltd. Finance Corp.
1.630% 8/17/25		95,000	95,415
3.250% 8/15/26		262,000	282,528
4.350% 3/15/24		350,000	385,665
Imperial Brands Finance PLC
3.875% 7/26/29 (c)		631,000	683,489
Reynolds American, Inc.
5.850% 8/15/45		220,000	267,332
			2,267,890
Airlines — 0.1%
American Airlines Pass-Through Trust, Series 2014-1, Class B,
4.375% 4/01/24		22,931	16,240

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Delta Air Lines, Inc. / SkyMiles IP Ltd.
4.500% 10/20/25 (c)	$	235,000	$	241,310
Spirit Airlines Pass-Through Trust, Series 2015-1, Class A,
4.100% 10/01/29		248,959		223,457
United Airlines Pass-Through Trust, Series 2018-1, Class B,
4.600% 9/01/27		78,230		60,662
				541,669
Auto Manufacturers — 0.6%
Ford Motor Credit Co. LLC
3.087% 1/09/23		320,000		313,565
3.336% 3/18/21		400,000		400,100
3.810% 1/09/24		450,000		445,500
4.140% 2/15/23		465,000		467,892
4.375% 8/06/23		475,000		482,267
General Motors Co.
4.200% 10/01/27		215,000		230,419
5.150% 4/01/38		130,000		138,056
General Motors Financial Co., Inc.
3.500% 11/07/24		490,000		514,768
4.150% 6/19/23		582,000		617,805
4.200% 11/06/21		301,000		310,676
Hyundai Capital America
2.850% 11/01/22 (c)		385,000		398,136
				4,319,184
Banks — 1.7%
ABN AMRO Bank NV
4.750% 7/28/25 (c)		75,000		84,458
Associated Banc-Corp.
4.250% 1/15/25		494,000		526,339
Bank of America Corp.
SOFR + 2.150% 2.592% VRN 4/29/31		310,000		329,816
4.183% 11/25/27		255,000		292,158
3 mo. USD LIBOR + 1.814% 4.244% VRN 4/24/38		200,000		243,722
3 mo. USD LIBOR + 1.310% 4.271% VRN 7/23/29		100,000		117,306
4.750% 4/21/45		125,000		163,520
6.110% 1/29/37		220,000		310,564
7.750% 5/14/38		95,000		157,338
The Bank of Nova Scotia
4.500% 12/16/25		200,000		231,677
3 mo. USD LIBOR + 2.648% 4.650% VRN (d)		715,000		693,107
Barclays Bank PLC
10.179% 6/12/21 (c)		440,000		462,928
Barclays PLC
3 mo. USD LIBOR + 1.380% 1.660% FRN 5/16/24		345,000		345,940
4.337% 1/10/28		260,000		289,526
BPCE SA
1.652% 10/06/26 (c) (e)		945,000		946,519
Citigroup, Inc.
3.875% 3/26/25		387,000		426,370
6.000% 10/31/33		97,000		130,670
6.625% 6/15/32		100,000		139,713
8.125% 7/15/39		90,000		156,653
Credit Suisse AG
6.500% 8/08/23 (c)		350,000		396,375

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Deutsche Bank AG
3.150% 1/22/21	$	428,000	$	430,589
Discover Bank 5 year USD Swap + 1.730%
4.682% VRN 8/09/28		495,000		518,928
First Republic Bank
4.375% 8/01/46		935,000		1,132,572
Fulton Financial Corp.
3.600% 3/16/22		230,000		235,072
The Goldman Sachs Group, Inc.
4.250% 10/21/25		100,000		113,770
5.950% 1/15/27		212,000		260,865
6.250% 2/01/41		60,000		89,634
6.750% 10/01/37		200,000		290,586
HSBC Holdings PLC
4.250% 3/14/24		200,000		214,473
4.250% 8/18/25		464,000		504,262
JP Morgan Chase & Co.
SOFR + 2.515% 2.956% VRN 5/13/31		245,000		262,862
5.600% 7/15/41		195,000		285,966
Morgan Stanley
4.350% 9/08/26		775,000		897,063
SVB Financial Group
3.500% 1/29/25		400,000		430,472
Valley National Bancorp
5.125% 9/27/23		245,000		262,516
Wells Fargo & Co.
5.375% 11/02/43		159,000		210,476
5.606% 1/15/44		110,000		150,135
				12,734,940
Beverages — 0.2%
Anheuser-Busch Cos. LLC/Anheuser-Busch InBev Worldwide, Inc.
4.900% 2/01/46		825,000		1,017,249
Molson Coors Beverage Co.
4.200% 7/15/46		285,000		300,630
5.000% 5/01/42		60,000		67,953
				1,385,832
Building Materials — 0.1%
Standard Industries, Inc.
5.000% 2/15/27 (c)		771,000		801,840
Chemicals — 0.4%
DuPont de Nemours, Inc.
5.319% 11/15/38		365,000		463,170
Huntsman International LLC
5.125% 11/15/22		197,000		211,834
LYB International Finance BV
5.250% 7/15/43		175,000		213,913
Nutrition & Biosciences, Inc.
1.832% 10/15/27 (c)		180,000		180,816
Syngenta Finance NV
4.441% 4/24/23 (c)		625,000		660,088
Yara International ASA
3.148% 6/04/30 (c)		85,000		90,957

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
4.750% 6/01/28 (c)	$	745,000	$	873,005
				2,693,783
Commercial Services — 0.0%
ERAC USA Finance LLC
6.700% 6/01/34 (c)		78,000		107,733
PayPal Holdings, Inc.
3.250% 6/01/50		170,000		188,056
				295,789
Computers — 0.3%
Apple, Inc.
2.650% 5/11/50		175,000		183,379
Dell International LLC/EMC Corp.
6.020% 6/15/26 (c)		616,000		723,295
Genpact Luxembourg Sarl
3.375% 12/01/24		770,000		806,336
3.700% STEP 4/01/22		360,000		368,547
Leidos, Inc.
4.375% 5/15/30 (c)		145,000		169,933
				2,251,490
Diversified Financial Services — 1.1%
AerCap Ireland Capital DAC / AerCap Global Aviation Trust
4.500% 9/15/23		335,000		345,235
AerCap Ireland Capital DAC/AerCap Global Aviation Trust
6.500% 7/15/25		160,000		172,731
Aircastle Ltd.
4.400% 9/25/23		315,000		311,614
5.000% 4/01/23		525,000		526,183
Ally Financial, Inc.
4.125% 2/13/22		375,000		388,612
Antares Holdings LP
6.000% 8/15/23 (c)		495,000		500,572
8.500% 5/18/25 (c)		450,000		474,577
Ares Finance Co. LLC
4.000% 10/08/24 (c)		355,000		379,488
Avolon Holdings Funding Ltd.
3.250% 2/15/27 (c)		310,000		276,561
Brookfield Finance, Inc.
4.350% 4/15/30		730,000		852,230
4.850% 3/29/29		433,000		516,623
GE Capital International Funding Co. Unlimited Co.
4.418% 11/15/35		200,000		211,112
Global Aircraft Leasing Co. Ltd.
6.500% 9/15/24 (c)		336,781		187,755
Lazard Group LLC
3.625% 3/01/27		184,000		198,736
3.750% 2/13/25		160,000		173,434
4.500% 9/19/28		460,000		532,129
LeasePlan Corp. NV
2.875% 10/24/24 (c)		345,000		356,046
Legg Mason, Inc.
5.625% 1/15/44		255,000		353,074
Park Aerospace Holdings Ltd.
4.500% 3/15/23 (c)		250,000		247,737

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
5.250% 8/15/22 (c)	$	1,375,000	$	1,380,562
				8,385,011
Electric — 0.5%
The Cleveland Electric Illuminating Co.
3.500% 4/01/28 (c)		155,000		167,489
CMS Energy Corp.
4.700% 3/31/43		115,000		143,659
4.875% 3/01/44		390,000		510,611
Entergy Arkansas LLC
2.650% 6/15/51		425,000		428,910
Entergy Louisiana LLC
4.950% 1/15/45		165,000		181,582
ITC Holdings Corp.
2.950% 5/14/30 (c)		225,000		241,951
Nevada Power Co.
6.650% 4/01/36		135,000		199,435
Oncor Electric Delivery Co.
7.500% 9/01/38		40,000		65,921
Pacific Gas and Electric Co.
2.500% 2/01/31		190,000		180,779
Pennsylvania Electric Co.
4.150% 4/15/25 (c)		295,000		323,495
Potomac Electric Power Co.
4.150% 3/15/43		350,000		423,498
Puget Energy, Inc.
3.650% 5/15/25		350,000		374,594
Xcel Energy, Inc.
6.500% 7/01/36		390,000		571,779
				3,813,703
Electronics — 0.0%
Ingram Micro, Inc.
5.450% STEP 12/15/24		203,000		217,131
Foods — 0.3%
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc.
5.500% 1/15/30 (c)		499,000		543,146
6.500% 4/15/29 (c)		130,000		144,296
Kraft Heinz Foods Co.
3.950% 7/15/25		351,000		380,852
Mars, Inc.
3.950% 4/01/49 (c)		415,000		502,391
Smithfield Foods, Inc.
3.000% 10/15/30 (c)		225,000		225,486
				1,796,171
Forest Products & Paper — 0.0%
Fibria Overseas Finance Ltd.
4.000% 1/14/25		250,000		265,000
Gas — 0.1%
NiSource, Inc.
4.800% 2/15/44		385,000		481,160

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
5.800% 2/01/42	$	175,000	$	237,910
				719,070
Health Care – Products — 0.0%
Dentsply Sirona, Inc.
3.250% 6/01/30		150,000		163,077
Health Care – Services — 0.1%
Advocate Health & Hospitals Corp.
3.829% 8/15/28		165,000		191,058
Humana, Inc.
4.800% 3/15/47		125,000		163,639
UnitedHealth Group, Inc.
3.125% 5/15/60		210,000		225,379
				580,076
Home Builders — 0.0%
Lennar Corp.
4.750% 5/30/25		200,000		218,276
Insurance — 2.0%
Allstate Corp. 3 mo. USD LIBOR + 2.938%
5.750% VRN 8/15/53		990,000		1,030,861
American International Group, Inc.
3.400% 6/30/30		285,000		315,599
4.200% 4/01/28		210,000		243,537
4.500% 7/16/44		200,000		233,311
4.750% 4/01/48		75,000		91,887
3 mo. USD LIBOR + 2.868% 5.750% VRN 4/01/48		625,000		682,682
AmTrust Financial Services, Inc.
6.125% 8/15/23		775,000		718,579
Arch Capital Group Ltd.
3.635% 6/30/50		310,000		333,279
Arch Capital Group US, Inc.
5.144% 11/01/43		170,000		216,289
Athene Global Funding
2.500% 1/14/25 (c)		630,000		649,381
Athene Holding Ltd.
4.125% 1/12/28		1,255,000		1,362,816
AXIS Specialty Finance LLC
3.900% 7/15/29		275,000		300,563
5 year CMT + 3.186% 4.900% VRN 1/15/40		300,000		299,715
AXIS Specialty Finance PLC
4.000% 12/06/27		665,000		727,917
Brighthouse Financial, Inc.
3.700% 6/22/27		300,000		311,209
4.700% 6/22/47		275,000		264,659
5.625% 5/15/30		230,000		267,850
Brown & Brown, Inc.
2.375% 3/15/31		145,000		145,892
4.200% 9/15/24		246,000		271,463
CNO Financial Group, Inc.
5.250% 5/30/25		590,000		676,709
Enstar Group Ltd.
4.500% 3/10/22		370,000		385,484
4.950% 6/01/29		350,000		392,195

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Equitable Holdings, Inc.
5.000% 4/20/48	$	225,000	$	265,957
Markel Corp.
3.350% 9/17/29		130,000		143,535
New York Life Insurance Co.
3.750% 5/15/50 (c)		125,000		140,928
The Progressive Corp. 3 mo. USD LIBOR + 2.539%
5.375% VRN (d)		375,000		375,000
Prudential Financial, Inc.
5 year CMT + 3.035% 3.700% VRN 10/01/50		85,000		86,726
3 mo. USD LIBOR + 3.920% 5.625% VRN 6/15/43		225,000		238,990
3 mo. USD LIBOR + 2.665% 5.700% VRN 9/15/48		630,000		712,247
3 mo. USD LIBOR + 4.175% 5.875% VRN 9/15/42		125,000		131,651
Reinsurance Group of America, Inc.
3.150% 6/15/30		290,000		315,734
3.900% 5/15/29		325,000		371,015
Teachers Insurance & Annuity Association of America
4.270% 5/15/47 (c)		175,000		204,893
USF&G Capital I
8.500% 12/15/45 (c)		150,000		235,729
Voya Financial, Inc. 3 mo. USD LIBOR + 2.084%
4.700% VRN 1/23/48		180,000		180,169
Willis North America, Inc.
2.950% 9/15/29		180,000		193,964
4.500% 9/15/28		480,000		570,725
XLIT Ltd.
4.450% 3/31/25		483,000		546,252
				14,635,392
Internet — 0.1%
Alphabet, Inc.
2.250% 8/15/60		200,000		189,115
Amazon.com, Inc.
4.050% 8/22/47		325,000		422,243
				611,358
Investment Companies — 0.5%
Ares Capital Corp.
3.500% 2/10/23		710,000		729,292
BlackRock TCP Capital Corp.
3.900% 8/23/24		850,000		863,617
4.125% 8/11/22		470,000		476,689
Icahn Enterprises LP/Icahn Enterprises Finance Corp.
6.250% 2/01/22		550,000		555,814
Sixth Street Specialty Lending, Inc.
3.875% 11/01/24		805,000		815,506
				3,440,918
Iron & Steel — 0.1%
Vale Overseas Ltd.
6.250% 8/10/26		275,000		325,187
6.875% 11/21/36		230,000		299,389
				624,576
Machinery – Diversified — 0.1%
CNH Industrial Capital LLC

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
1.950% 7/02/23	$	135,000	$	137,531
3.875% 10/15/21		700,000		719,048
				856,579
Media — 0.5%
CCO Holdings LLC/CCO Holdings Capital Corp.
5.125% 5/01/27 (c)		200,000		210,444
Charter Communications Operating LLC/Charter Communications Operating Capital
6.484% 10/23/45		225,000		301,782
Comcast Corp.
3.400% 7/15/46		220,000		244,792
3.450% 2/01/50		315,000		355,842
3.969% 11/01/47		135,000		161,377
4.750% 3/01/44		190,000		250,331
Discovery Communications LLC
3.950% 3/20/28		349,000		397,022
4.000% 9/15/55 (c)		194,000		196,969
4.650% 5/15/50		135,000		154,752
Grupo Televisa SAB
6.625% 3/18/25		495,000		596,166
Time Warner Cable, Inc.
6.750% 6/15/39		110,000		148,755
ViacomCBS, Inc.
4.200% 5/19/32		210,000		240,315
The Walt Disney Co.
3.600% 1/13/51		365,000		411,321
				3,669,868
Mining — 0.2%
Glencore Finance Canada Ltd.
5.550% STEP 10/25/42 (c)		149,000		174,664
Glencore Funding LLC
3.875% 10/27/27 (c)		160,000		174,461
4.625% 4/29/24 (c)		600,000		660,991
Kinross Gold Corp.
4.500% 7/15/27		166,000		188,275
Teck Resources Ltd.
6.000% 8/15/40		200,000		226,475
				1,424,866
Miscellaneous - Manufacturing — 0.1%
Carlisle Cos., Inc.
2.750% 3/01/30		326,000		346,526
General Electric Co.
4.125% 10/09/42		42,000		42,493
				389,019
Oil & Gas — 0.8%
BP Capital Markets PLC 5 year CMT + 4.036%
4.375% VRN (d)		360,000		375,300
Cenovus Energy, Inc.
4.250% 4/15/27		275,000		248,622
6.750% 11/15/39		158,000		158,845
Diamondback Energy, Inc.
3.250% 12/01/26		250,000		250,823

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
EQT Corp.
3.000% 10/01/22	$	340,000	$	331,925
3.900% 10/01/27		1,090,000		1,003,481
7.875% STEP 2/01/25		395,000		437,838
Marathon Petroleum Corp.
4.500% 4/01/48		85,000		86,143
4.750% 9/15/44		100,000		104,252
6.500% 3/01/41		170,000		207,250
Newfield Exploration Co.
5.625% 7/01/24		250,000		242,513
5.750% 1/30/22		417,000		416,820
Occidental Petroleum Corp.
6.450% 9/15/36		250,000		213,125
6.600% 3/15/46		257,000		221,341
Ovintiv, Inc.
6.500% 2/01/38		80,000		72,651
Patterson-UTI Energy, Inc.
3.950% 2/01/28		410,000		316,886
Petroleos Mexicanos
5.350% 2/12/28		190,000		164,350
6.375% 1/23/45		80,000		61,320
6.500% 3/13/27		60,000		56,222
6.625% 6/15/38		37,000		29,174
Saudi Arabian Oil Co.
4.250% 4/16/39 (c)		495,000		568,996
				5,567,877
Oil & Gas Services — 0.1%
National Oilwell Varco, Inc.
3.600% 12/01/29		385,000		373,939
3.950% 12/01/42		366,000		329,117
				703,056
Packaging & Containers — 0.1%
Amcor Finance USA, Inc.
3.625% 4/28/26		565,000		629,393
WRKCo, Inc.
3.000% 6/15/33		165,000		179,486
				808,879
Pharmaceuticals — 0.6%
AbbVie, Inc.
4.700% 5/14/45		490,000		603,338
Bristol-Myers Squibb Co.
4.350% 11/15/47		200,000		264,143
Cigna Corp.
4.800% 7/15/46 (c)		195,000		244,347
CVS Health Corp.
4.300% 3/25/28		250,000		292,618
5.050% 3/25/48		230,000		293,574
6.125% 9/15/39		175,000		243,161
CVS Pass-Through Trust
5.926% 1/10/34 (c)		243,509		281,812
McKesson Corp.
4.883% 3/15/44		60,000		73,492
6.000% 3/01/41		125,000		170,309

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Mylan NV
3.950% 6/15/26	$	495,000	$	556,890
5.250% 6/15/46		320,000		397,153
Takeda Pharmaceutical Co. Ltd.
3.375% 7/09/60		245,000		258,093
Teva Pharmaceutical Finance Netherlands III BV
2.200% 7/21/21		232,000		229,796
Upjohn, Inc.
2.700% 6/22/30 (c)		300,000		310,608
				4,219,334
Pipelines — 0.6%
Energy Transfer Operating LP
4.200% 4/15/27		440,000		455,246
5.875% 1/15/24		200,000		220,198
6.125% 12/15/45		200,000		200,758
3 mo. USD LIBOR + 4.028% 6.250% VRN (d)		540,000		352,350
5 year CMT + 5.134% 6.750% VRN (d)		240,000		184,800
EnLink Midstream Partners LP
4.150% 6/01/25		621,000		534,700
4.850% 7/15/26		149,000		128,901
Enterprise Products Operating LLC
3 mo. USD LIBOR + 3.033% 5.250% VRN 8/16/77		225,000		214,256
3 mo. USD LIBOR + 2.570% 5.375% VRN 2/15/78		195,000		173,550
EQM Midstream Partners LP
4.750% 7/15/23		500,000		499,025
MPLX LP
4.500% 4/15/38		195,000		199,631
6.250% 10/15/22		97,000		97,105
3 mo. USD LIBOR + 4.652% 6.875% VRN (d)		300,000		245,665
Plains All American Pipeline LP 3 mo. USD LIBOR + 4.110%
6.125% VRN (d)		585,000		371,124
Plains All American Pipeline LP/PAA Finance Corp.
3.800% 9/15/30		280,000		271,511
4.500% 12/15/26		93,000		98,882
4.700% 6/15/44		275,000		243,828
6.650% 1/15/37		100,000		109,423
Sunoco Logistics Partners Operations LP
5.300% 4/01/44		75,000		69,877
				4,670,830
Private Equity — 0.2%
Apollo Management Holdings LP 5 year CMT + 3.266%
4.950% VRN 1/14/50 (c)		185,000		184,930
Carlyle Finance Subsidiary LLC
3.500% 9/19/29 (c)		370,000		400,390
Hercules Capital, Inc.
4.625% 10/23/22		470,000		475,779
KKR Group Finance Co. VI LLC
3.750% 7/01/29 (c)		280,000		322,125
KKR Group Finance Co. VIII LLC
3.500% 8/25/50 (c)		170,000		173,236
				1,556,460

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Real Estate Investment Trusts (REITS) — 1.0%
Agree LP
2.900% 10/01/30	$	115,000	$	119,280
American Tower Trust #1
3.652% 3/15/48 (c)		310,000		336,312
Crown Castle International Corp.
5.200% 2/15/49		71,000		93,433
Healthcare Trust of America Holdings LP
3.500% 8/01/26		495,000		551,010
Highwoods Realty LP
4.125% 3/15/28		125,000		137,908
Host Hotels & Resorts LP
3.500% 9/15/30		509,000		487,220
SBA Tower Trust
1.884% 7/15/50 (c)		373,000		381,285
2.836% 1/15/50 (c)		1,300,000		1,391,303
Service Properties Trust
4.500% 6/15/23		170,000		166,716
4.950% 10/01/29		265,000		227,237
Spirit Realty LP
3.200% 1/15/27		555,000		562,120
3.400% 1/15/30		120,000		119,310
4.000% 7/15/29		300,000		312,058
4.450% 9/15/26		59,000		63,309
Store Capital Corp.
4.625% 3/15/29		320,000		343,137
Tanger Properties LP
3.875% 12/01/23		322,000		323,839
VEREIT Operating Partnership LP
3.100% 12/15/29		635,000		636,110
3.400% 1/15/28		140,000		146,173
4.625% 11/01/25		460,000		508,256
WP Carey, Inc.
4.250% 10/01/26		185,000		208,863
				7,114,879
Retail — 0.2%
Advance Auto Parts, Inc.
1.750% 10/01/27		75,000		74,777
AutoZone, Inc.
1.650% 1/15/31		235,000		230,066
El Puerto de Liverpool SAB de CV
3.950% 10/02/24 (c)		445,000		463,361
Starbucks Corp.
2.550% 11/15/30		395,000		419,393
				1,187,597
Semiconductors — 0.1%
KLA Corp.
3.300% 3/01/50		410,000		433,174
Software — 0.1%
Broadridge Financial Solutions, Inc.
2.900% 12/01/29		441,000		477,747

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Microsoft Corp.
4.450% 11/03/45	$	330,000	$	466,285
				944,032
Telecommunications — 0.4%
AT&T, Inc.
1.650% 2/01/28		165,000		165,312
3.500% 9/15/53 (c)		571,000		552,057
3.550% 9/15/55 (c)		1,118,000		1,083,535
Cisco Systems, Inc.
5.500% 1/15/40		55,000		81,599
Crown Castle Towers LLC
4.241% 7/15/48 (c)		250,000		284,894
Qwest Corp
6.750% 12/01/21		162,000		171,080
Telefonica Emisiones SAU
4.665% 3/06/38		180,000		207,456
Verizon Communications, Inc.
6.550% 9/15/43		149,000		242,539
				2,788,472
Transportation — 0.1%
Autoridad del Canal de Panama
4.950% 7/29/35 (c)		210,000		261,189
CSX Corp.
4.750% 11/15/48		155,000		205,776
Norfolk Southern Corp.
4.050% 8/15/52		215,000		263,472
				730,437
TOTAL CORPORATE DEBT   (Cost $94,102,661)				100,131,787
Municipal Obligations — 0.1%
JobsOhio Beverage System Series B, Revenue Bonds,
4.532% 1/01/35		325,000		417,264
Orange County Local Transportation Authority BAB, Revenue Bonds,
6.908% 2/15/41		230,000		352,286
State of California BAB, General Obligation
7.600% 11/01/40		105,000		189,141
				958,691
TOTAL MUNICIPAL OBLIGATIONS   (Cost $823,384)				958,691
Non-U.S. Government Agency Obligations — 10.6%
Automobile Asset-Backed Securities — 0.5%
Avis Budget Rental Car Funding AESOP LLC, Series 2019-1A, Class C
4.530% 3/20/23 (c)		305,000		308,852
Carvana Auto Receivables Trust, Series 2019-4A, Class D
3.070% 7/15/25 (c)		359,000		369,333
Hertz Vehicle Financing II LP
Series 2019-3A, Class B, 3.030% 12/26/25 (c)		493,000		490,782
Series 2019-3A, Class C, 3.430% 12/26/25 (c)		500,000		488,547
Series 2018-1A, Class B, 3.600% 2/25/24 (c)		650,000		644,433

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
OneMain Direct Auto Receivables Trust, Series 2019-1A, Class B
3.950% 11/14/28 (c)	$	424,000	$	445,635
Santander Revolving Auto Loan Trust
Series 2019-A, Class B, 2.800% 1/26/32 (c)		204,000		214,644
Series 2019-A, Class C, 3.000% 1/26/32 (c)		126,000		127,571
Series 2019-A, Class D, 3.450% 1/26/32 (c)		263,000		262,051
				3,351,848
Commercial Mortgage-Backed Securities — 1.8%
Aventura Mall Trust, Series 2018-AVM, Class C,
4.249% VRN 7/05/40 (c) (f)		710,000		666,610
BAMLL Commercial Mortgage Securities Trust, Series 2018-DSNY, Class C, 1 mo. USD LIBOR + 1.350%
1.502% FRN 9/15/34 (c)		130,000		121,553
BANK
Series 2019-BN24, Class B, 3.455% VRN 11/15/62 (f)		409,000		446,747
Series 2019-BN24, Class C, 3.635% VRN 11/15/62 (f)		397,000		393,669
Series 2019-BN17, Class B, 4.128% VRN 4/15/52 (f)		150,000		173,636
Series 2019-BN16, Class AS, 4.267% 2/15/52		176,250		209,803
Series 2019-BN16, Class B, 4.438% VRN 2/15/52 (f)		136,855		153,020
Series 2018-BN14, Class C, 4.753% VRN 9/15/60 (f)		210,000		213,784
BBCMS Mortgage Trust
Series 2020-C7, Class AS, 2.444% 4/15/53		320,000		336,139
Series 2018-CHRS, Class B, 4.409% VRN 8/05/38 (c) (f)		350,000		311,206
Series 2018-CHRS, Class C, 4.409% VRN 8/05/38 (c) (f)		280,000		229,827
Series 2018-CHRS, Class D, 4.409% VRN 8/05/38 (c) (f)		210,000		157,980
BHMS Mortgage Trust
Series 2018-ATLS, Class A, 1 mo. USD LIBOR + 1.250% 1.402% FRN 7/15/35 (c)		970,000		927,578
Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500% 1.652% FRN 7/15/35 (c)		850,000		788,397
BX Commercial Mortgage Trust
Series 2018-IND, Class E, 1 mo. USD LIBOR + 1.700% 1.852% FRN 11/15/35 (c)		294,000		291,631
Series 2019-XL, Class E, 1 mo. USD LIBOR + 1.800% 1.952% FRN 10/15/36 (c)		371,175		367,721
Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000% 2.152% FRN 10/15/36 (c)		449,967		444,655
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class D, 1 mo. USD LIBOR + 1.750%
1.902% FRN 12/15/37 (c)		224,629		219,646
Century Plaza Towers
Series 2019-CPT, Class D, 3.097% VRN 11/13/39 (c) (f)		225,000		224,355
Series 2019-CPT, Class E, 3.097% VRN 11/13/39 (c) (f)		338,000		319,064
Citigroup Commercial Mortgage Trust, Series 2019-GC41, Class C
3.502% 8/10/56		241,000		238,345
Commercial Mortgage Pass-Through Certificates
Series 2012-CR4, Class B, 3.703% 10/15/45 (c)		195,000		127,327
Series 2015-CR23, Class C, 4.435% VRN 5/10/48 (f)		140,000		140,944
Series 2014-UBS5, Class B, 4.514% VRN 9/10/47 (f)		290,000		295,907
DBUBS Mortgage Trust, Series 2011-LC1A, Class B,
5.471% VRN 11/10/46 (c) (f)		110,000		110,241
GS Mortgage Securities Trust
Series 2017-GS6, Class B, 3.869% 5/10/50		440,000		487,629
Series 2012-GC6, Class AS, 4.948% 1/10/45 (c)		100,000		102,798
Jackson Park Trust, Series 2019-LIC, Class C,
3.131% VRN 10/14/39 (c) (f)		500,000		516,208

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
JP Morgan Chase Commercial Mortgage Securities Trust, Series 2016-JP2, Class AS
3.056% 8/15/49	$	490,000	$	521,465
JPMBB Commercial Mortgage Securities Trust, Series 2015-C27, Class B
3.898% 2/15/48		500,000		529,220
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800%
1.952% FRN 5/15/36 (c)		326,000		322,436
Manhattan West, Series 2020-1MW, Class B,
2.413% VRN 9/10/39 (c) (f)		519,000		531,779
MFT Trust
Series 2020-ABC, Class A, 3.358% 2/10/42 (c)		205,000		212,028
Series 2020-ABC, Class B, 3.477% VRN 2/10/42 (c) (f)		227,000		230,560
MKT Mortgage Trust
Series 2020-525M, Class D, 2.941% VRN 2/12/40 (c) (f)		109,000		106,583
Series 2020-525M, Class E, 2.941% VRN 2/12/40 (c) (f)		213,000		198,818
Morgan Stanley Capital I Trust
Series 2019-L2, Class AS, 4.272% 3/15/52		500,000		587,506
Series 2018-H3, Class B, 4.620% VRN 7/15/51 (f)		120,000		138,786
Series 2011-C2, Class B, 5.200% VRN 6/15/44 (c) (f)		250,000		250,959
Wells Fargo Commercial Mortgage Trust
Series 2019-C49, Class AS, 4.244% 3/15/52		291,000		341,300
Series 2018-C45, Class AS, 4.405% VRN 6/15/51 (f)		240,000		281,628
Series 2018-C45, Class B, 4.556% 6/15/51		60,000		65,953
WF-RBS Commercial Mortgage Trust, Series 2012-C8, Class B
4.311% 8/15/45		190,000		193,639
				13,529,080
Other Asset-Backed Securities — 5.2%
321 Henderson Receivables LLC
Series 2005-1A, Class A1, 1 mo. USD LIBOR + .230% 0.382% FRN 11/15/40 (c)		41,051		39,910
Series 2015-1A, Class A, 3.260% 9/15/72 (c)		41,568		43,245
522 Funding CLO I Ltd., Series 2018-2A, Class C, 3 mo. USD LIBOR + 2.250%
2.522% FRN 10/20/31 (c)		310,000		301,878
AASET Trust
Series 2020-1A, Class A, 3.351% 1/16/40 (c)		355,277		327,357
Series 2019-1, Class A, 3.844% 5/15/39 (c)		463,886		432,272
Series 2017-1A, Class A, 3.967% 5/16/42 (c)		289,117		261,381
Series 2018-2A, Class A, 4.454% 11/18/38 (c)		295,645		274,970
Adams Outdoor Advertising LP, Series 2018-1, Class A
4.810% 11/15/48 (c)		376,287		391,518
Ares CLO Ltd., Series 2019-54A, Class C, 3 mo. USD LIBOR + 2.850%
3.125% FRN 10/15/32 (c)		500,000		500,203
Ascentium Equipment Receivables Trust, Series 2019-2A, Class E
3.780% 5/10/27 (c)		827,000		828,708
Atlas Senior Loan Fund VII Ltd., Series 2016-7A, Class A1R, 3 mo. USD LIBOR + 1.280%
1.531% FRN 11/27/31 (c)		953,952		937,792
Atrium XV, Series 15A, Class B, 3 mo. USD LIBOR + 1.750%
2.006% FRN 1/23/31 (c)		250,000		246,860
Benefit Street Partners CLO V-B Ltd., Series 2018-5BA, Class A1A, 3 mo. USD LIBOR + 1.090%
1.362% FRN 4/20/31 (c)		260,000		255,735
BlueMountain CLO XXV Ltd., Series 2019-25A, Class B, 3 mo. USD LIBOR + 1.800%
2.075% FRN 7/15/32 (c)		500,000		499,339

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
BRE Grand Islander Timeshare Issuer LLC, Series 2017-1A, Class A
2.940% 5/25/29 (c)	$	76,565	$	76,910
CAL Funding II Ltd., Series 2018-2A, Class A
4.340% 9/25/43 (c)		232,000		230,057
Capital Automotive REIT
Series 2014-1A, Class A, 3.660% 10/15/44 (c)		151,164		150,906
Series 2017-1A, Class A2, 4.180% 4/15/47 (c)		131,405		131,817
Carlyle Global Market Strategies CLO Ltd., Series 2018-4A, Class A2, 3 mo. USD LIBOR + 1.800%
2.072% FRN 1/20/31 (c)		720,000		712,755
CARS-DB4 LP, Series 2020-1A, Class A3
3.250% 2/15/50 (c)		116,635		119,641
Castlelake Aircraft Securitization Trust, Series 2019-1A, Class A
3.967% 4/15/39 (c)		332,506		307,720
Castlelake Aircraft Structured Trust, Series 2018-1, Class A
4.125% 6/15/43 (c)		644,178		601,385
CBAM Ltd., Series 2018-6A, Class B1R, 3 mo. USD LIBOR + 2.100%
2.375% FRN 1/15/31 (c)		250,000		250,132
CF Hippolyta LLC
Series 2020-1, Class A1, 1.690% 7/15/60 (c)		330,000		333,729
Series 2020-1, Class B1, 2.280% 7/15/60 (c)		128,000		130,236
CIFC Funding Ltd.
Series 2017-5A, Class A1, 3 mo. USD LIBOR + 1.180% 1.453% FRN 11/16/30 (c)		340,000		337,015
Series 2020-1A, Class A1, 3 mo. USD LIBOR + 1.700% 1.942% FRN 7/15/32 (c)		250,000		250,753
Clear Creek CLO Ltd., Series 2015-1A, Class AR, 3 mo. USD LIBOR + 1.200%
1.472% FRN 10/20/30 (c)		480,000		474,022
CLI Funding LLC, Series 2019-1A, Class A
3.710% 5/18/44 (c)		370,456		377,119
Crestline Denali CLO XIV Ltd., Series 2016-1A, Class A1R, 3 mo. USD LIBOR + 1.280%
1.536% FRN 10/23/31 (c)		249,836		245,135
Cronos Containers Program Ltd., Series 2014-2A, Class A
3.270% 11/18/29 (c)		105,556		105,722
DB Master Finance LLC
Series 2019-1A, Class A2II, 4.021% 5/20/49 (c)		414,810		438,723
Series 2019-1A, Class A23, 4.352% 5/20/49 (c)		375,210		410,160
Diamond Resorts Owner Trust, Series 2019-1A, Class A
2.890% 2/20/32 (c)		512,552		521,203
Domino's Pizza Master Issuer LLC
Series 2019-1A, Class A2, 3.668% 10/25/49 (c)		258,050		273,945
Series 2018-1A, Class A2I, 4.116% 7/25/48 (c)		303,800		321,039
Series 2017-1A, Class A23, 4.118% 7/25/47 (c)		106,975		114,216
Series 2015-1A, Class A2II, 4.474% 10/25/45 (c)		518,400		551,239
Eaton Vance CLO Ltd., Series 2018-1A, Class B, 3 mo. USD LIBOR + 1.750%
2.025% FRN 10/15/30 (c)		700,000		696,557
Elmwood CLO Ltd.
Series 2019-2A, Class A, 3 mo. USD LIBOR + 1.450%
1.722% FRN 4/20/31 (c)		450,000		450,174
Series 2019-3A, Class B, 3 mo. USD LIBOR + 1.950%
2.225% FRN 10/15/32 (c)		250,000		250,546
Falcon Aerospace Ltd., Series 2019-1, Class A
3.597% 9/15/39 (c)		472,294		430,599
FCI Funding LLC, Series 2019-1A, Class A
3.630% 2/18/31 (c)		74,651		75,955

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
First Franklin Mortgage Loan Trust, Series 2004-FFH4, Class M6, 1 mo. USD LIBOR + 1.725%
1.873% FRN 1/25/35	$	420,000	$	392,659
Flatiron CLO Ltd., Series 2019-1A, Class B, 3 mo. USD LIBOR + 1.900%
2.180% FRN 11/16/32 (c)		250,000		250,055
Global SC Finance SRL, Series 2014-1A, Class A1
3.190% 7/17/29 (c)		95,833		95,331
Goodgreen Trust
Series 2019-2A, Class A, 2.760% 10/15/54 (c)		696,890		706,271
Series 2016-1A, Class A, 3.230% 10/15/52 (c)		241,411		250,939
Series 2017-2A, Class A, 3.260% 10/15/53 (c)		303,828		313,919
Series 2017-1A, Class A, 3.740% 10/15/52 (c)		182,922		192,926
Series 2018-1A, Class A, 3.930% VRN 10/15/53 (c) (f)		357,964		380,427
Helios Issuer LLC, Series 2017-1A, Class A
4.940% 9/20/49 (c)		211,236		224,863
Hero Funding Trust
Series 2016-3A, Class A1, 3.080% 9/20/42 (c)		114,029		115,626
Series 2017-3A, Class A1, 3.190% 9/20/48 (c)		142,799		147,167
Series 2016-4A, Class A1, 3.570% 9/20/47 (c)		123,402		128,410
Series 2018-1A, Class A2, 4.670% 9/20/48 (c)		274,001		294,021
Highbridge Loan Management Ltd.
Series 12A-18, Class B, 3 mo. USD LIBOR + 1.850% 2.122% FRN 7/18/31 (c)		250,000		242,506
Series 13A-18, Class C, 3 mo. USD LIBOR + 2.150% 2.425% FRN 10/15/30 (c)		350,000		339,032
Horizon Aircraft Finance Ltd.
Series 2019-2, Class A, 3.425% 11/15/39 (c)		529,246		485,231
Series 2019-1, Class A, 3.721% 7/15/39 (c)		313,990		293,170
J.G. Wentworth LLC
Series 2018-2A, Class A, 3.960% 10/15/75 (c)		268,950		275,155
Series 2017-1A, Class B, 5.430% 8/15/62 (c)		1,100,000		1,220,460
KDAC Aviation Finance Ltd., Series 2017-1A, Class A
4.212% 12/15/42 (c)		335,189		294,422
KKR Financial CLO Ltd.
Series 24, Class A1, 3 mo. USD LIBOR + 1.360% 1.632% FRN 4/20/32 (c)		300,000		297,050
Series 26, Class B1, 3 mo. USD LIBOR + 2.050% 2.325% FRN 7/15/32 (c)		250,000		250,216
KREF Ltd., Series 2018-FL1, Class C, 1 mo. USD LIBOR + 2.000%
2.151% FRN 6/15/36 (c)		210,000		203,848
Lunar Aircraft Ltd., Series 2020-1A, Class A
3.376% 2/15/45 (c)		215,661		199,781
MACH 1 Cayman Ltd., Series 2019-1, Class A
3.474% 10/15/39 (c)		459,551		417,992
Madison Park Funding Ltd.
Series 2018-28A, Class B, 3 mo. USD LIBOR + 1.600% 1.875% FRN 7/15/30 (c)		430,000		422,458
Series 2018-29A, Class C, 3 mo. USD LIBOR + 2.200% 2.472% FRN 10/18/30 (c)		550,000		535,487
Mosaic Solar Loans LLC
Series 2017-2A, Class A, 3.820% 6/22/43 (c)		97,749		103,005
Series 2017-1A, Class A, 4.450% 6/20/42 (c)		43,515		46,710
MP CLO III Ltd., Series 2013-1A, Class AR, 3 mo. USD LIBOR + 1.250%
1.522% FRN 10/20/30 (c)		300,000		296,327
NP SPE LLC, Series 2017-1A, Class A2
4.219% 10/21/47 (c)		380,000		390,561
OHA Credit Funding Ltd.
Series 2019-4A, Class A1, 3 mo. USD LIBOR + 1.330% 1.588% FRN 10/22/32 (c)		250,000		248,555

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2015-11A, Class CR, 3 mo. USD LIBOR + 2.150% 2.422% FRN 1/20/32 (c)	$	300,000	$	291,896
Series 2019-4A, Class C, 3 mo. USD LIBOR + 2.650% 2.908% FRN 10/22/32 (c)		250,000		249,443
OneMain Financial Issuance Trust, Series 2019-2A, Class A
3.140% 10/14/36 (c)		1,810,000		1,928,911
Oxford Finance Funding Trust
Series 2020-1A, Class A2, 3.101% 2/15/28 (c)		353,000		358,046
Series 2016-1A, Class A, 3.968% 6/17/24 (c)		26,879		26,890
Palmer Square CLO Ltd., Series 2015-1A, Class A2R2, 3 mo. USD LIBOR + 1.650%
1.897% FRN 5/21/29 (c)		500,000		497,868
Pioneer Aircraft Finance Ltd., Series 2019-1, Class A
3.967% 6/15/44 (c)		335,979		310,944
Planet Fitness Master Issuer LLC, Series 2019-1A, Class A2
3.858% 12/05/49 (c)		525,033		493,809
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850%
2.998% FRN 2/25/23 (c)		200,000		195,203
Sierra Receivables Funding LLC, Series 2015-3A, Class B
3.080% 9/20/32 (c)		11,164		11,153
Sierra Timeshare Receivables Funding LLC, Series 2020-2A, Class B
2.320% 7/20/37 (c)		237,692		237,495
Stack Infrastructure Issuer LLC, Series 2020-1A, Class A2
1.893% 8/25/45 (c)		210,000		211,400
Steele Creek CLO Ltd., Series 2018-2A, Class C, 3 mo. USD LIBOR + 2.300%
2.570% FRN 8/18/31 (c)		290,000		270,857
Store Master Funding I-VII
Series 2019-1, Class A2, 3.650% 11/20/49 (c)		655,559		665,058
Series 2018-1A, Class A2, 4.290% 10/20/48 (c)		249,704		264,430
Structured Receivables Finance LLC, Series 2010-B, Class A
3.730% 8/15/36 (c)		51,565		54,082
Sunnova Helios II Issuer LLC, Series 2018-1A, Class A
4.870% 7/20/48 (c)		109,787		118,129
SuttonPark Structured Settlements LLC, Series 2017-1A, Class A
4.190% 1/15/71 (c)		330,283		382,140
Taco Bell Funding LLC, Series 2018-1A, Class A2II
4.940% 11/25/48 (c)		235,800		251,742
TAL Advantage VII LLC, Series 2020-1A, Class A
2.050% 9/20/45 (c)		1,100,000		1,101,966
Textainer Marine Containers VII Ltd., Series 2019-1A, Class A
3.960% 4/20/44 (c)		108,173		108,173
Tif Funding II LLC, Series 2020-1A, Class A
2.090% 8/20/45 (c)		154,031		153,778
Trinity Rail Leasing LP
Series 2019-2A, Class A2, 3.100% 10/18/49 (c)		731,000		712,964
Series 2019-1A, Class A, 3.820% 4/17/49 (c)		826,615		861,103
Series 2018-1A, Class A2, 4.620% 6/17/48 (c)		410,000		416,739
Triton Container Finance VIII LLC, Series 2020-1A, Class A
2.110% 9/20/45 (c)		750,000		750,965
Vantage Data Centers LLC, Series 2020-2A, Class A2
1.992% 9/15/45 (c) (e)		300,000		300,137
Voya CLO Ltd., Series 2015-3A, Class A3R, 3 mo. USD LIBOR + 1.700%
1.972% FRN 10/20/31 (c)		300,000		293,831
WAVE LLC, Series 2019-1A, Class A
3.597% 9/15/44 (c)		899,069		833,949

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
WAVE Trust, Series 2017-1A, Class A
3.844% 11/15/42 (c)	$	537,773	$	486,603
Welk Resorts LLC, Series 2015-AA, Class A
2.790% 6/16/31 (c)		39,137		38,976
Wendy's Funding LLC, Series 2015-1A, Class A23
4.497% 6/15/45 (c)		403,750		403,201
				38,047,039
Student Loans Asset-Backed Securities — 2.9%
CIT Education Loan Trust, Series 2005-1, Class B, 3 mo. USD LIBOR + .210%
0.460% FRN 6/15/43		595,105		531,097
College Avenue Student Loans LLC
Series 2019-A, Class B, 3.810% 12/28/48 (c)		531,000		525,832
Series 2019-A, Class C, 4.460% 12/28/48 (c)		270,000		267,250
College Loan Corp. Trust I, Series 2007-1, Class B2, 28 day ARS
FRN 1/25/47		130,000		103,494
DRB Prime Student Loan Trust, Series 2016-R, Class A1, 1 mo. USD LIBOR + 1.900%
2.048% FRN 10/25/44 (c)		118,235		118,523
ECMC Group Student Loan Trust
Series 2018-2A, Class A, 1 mo. USD LIBOR + .800% 0.948% FRN 9/25/68 (c)		399,679		392,162
Series 2017-1A, Class A, 1 mo. USD LIBOR + 1.200% 1.348% FRN 12/27/66 (c)		283,604		282,034
Series 2016-1A, Class A, 1 mo. USD LIBOR + 1.350% 1.498% FRN 7/26/66 (c)		401,569		405,509
EdLinc Student Loan Funding Trust
Series 2017-A, Class A, Update Replacements.xls: PRIME - 1.150% 3.600% FRN 12/01/47 (c)		290,561		287,128
Series 2012-1, Class B, 1 mo. USD LIBOR + 4.240% 4.388% FRN 11/26/40 (c)		270,000		286,784
Goal Capital Funding Trust, Series 2006-1, Class B, 3 mo. USD LIBOR + .450%
0.700% FRN 8/25/42		116,754		101,489
KnowledgeWorks Foundation, Series 2010-1, Class A, 3 mo. USD LIBOR + .950%
1.200% FRN 2/25/42		92,492		90,938
Laurel Road Prime Student Loan Trust
Series 2017-B, Class BFX, 3.020% 8/25/42 (c)		86,016		86,926
Series 2018-B, Class BFX, 3.720% 5/26/43 (c)		76,461		78,204
Navient Private Education Loan Trust, Series 2018-BA, Class A2B, 1 mo. USD LIBOR + .720%
0.872% FRN 12/15/59 (c)		137,558		131,705
Navient Private Education Refi Loan Trust
Series 2019-A, Class B, 3.900% 1/15/43 (c)		284,000		289,699
Series 2018-CA, Class B, 4.220% 6/16/42 (c)		250,000		252,838
Navient Student Loan Trust
Series 2016-1A, Class A, 1 mo. USD LIBOR + .700% 0.848% FRN 2/25/70 (c)		350,693		341,940
Series 2018-2A, Class A3, 1 mo. USD LIBOR + .750% 0.898% FRN 3/25/67 (c)		550,000		534,152
Series 2018-3A, Class A3, 1 mo. USD LIBOR + .800% 0.948% FRN 3/25/67 (c)		750,000		742,588
Series 2019-1A, Class A2, 1 mo. USD LIBOR + .900% 1.048% FRN 12/27/67 (c)		850,000		847,746
Series 2016-7A, Class A, 1 mo. USD LIBOR + 1.150% 1.298% FRN 3/25/66 (c)		733,302		733,302

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2016-5A, Class A, 1 mo. USD LIBOR + 1.250% 1.398% FRN 6/25/65 (c)	$	337,989	$	337,989
Series 2016-6A, Class A3, 1 mo. USD LIBOR + 1.300% 1.448% FRN 3/25/66 (c)		1,100,000		1,109,618
Series 2018-4A, Class B, 1 mo. USD LIBOR + 1.300% 1.448% FRN 6/27/67 (c)		750,000		703,556
Series 2014-1, Class B, 1 mo. USD LIBOR + 1.500% 1.648% FRN 6/25/48		220,000		201,673
Series 2014-8, Class B, 1 mo. USD LIBOR + 1.500% 1.648% FRN 7/26/49		155,000		143,894
Series 2015-3, Class B, 1 mo. USD LIBOR + 1.500% 1.648% FRN 10/25/58		150,000		135,187
Series 2019-BA, Class B, 4.040% 12/15/59 (c)		750,000		782,445
Nelnet Private Education Loan Trust, Series 2016-A, Class A1B
3.600% 12/26/40 (c)		55,086		55,369
Nelnet Student Loan Trust
Series 2006-3, Class B, 3 mo. USD LIBOR + .250% 0.475% FRN 6/25/41		134,313		116,199
Series 2018-3A, Class A3, 1 mo. USD LIBOR + .750% 0.898% FRN 9/27/66 (c)		600,000		588,583
Series 2005-4, Class A4R2, 28 day ARS 1.191% FRN 3/22/32		193,881		186,118
Series 2015-3A, Class B, 1 mo. USD LIBOR + 1.500% 1.648% FRN 6/25/54 (c)		150,000		145,177
Series 2019-5, Class A, 2.530% 10/25/67 (c)		1,492,023		1,549,799
SLM Student Loan Trust
Series 2006-2, Class R, 0.000% 1/25/41		1,799		1,083,566
Series 2005-4, Class B, 3 mo. USD LIBOR + .180% 0.425% FRN 7/25/55		237,022		210,927
Series 2006-5, Class B, 3 mo. USD LIBOR + .210% 0.455% FRN 10/25/40		301,696		269,728
Series 2005-6, Class B, 3 mo. USD LIBOR + .290% 0.535% FRN 1/25/44		325,628		290,133
Series 2004-1 Class B, 3 mo. USD LIBOR + .500% 0.745% FRN 7/25/39		290,206		267,991
Series 2003-14, Class A7, 3 mo. USD LIBOR + .600% 0.845% FRN 10/25/65 (c)		300,000		293,064
SMB Private Education Loan Trust
Series 2019-A, Class A2B, 1 mo. USD LIBOR + .870% 1.022% FRN 7/15/36 (c)		126,000		124,410
Series 2019-B, Class A2B, 1 mo. USD LIBOR + 1.000% 1.152% FRN 6/15/37 (c)		1,200,000		1,198,009
Series 2020-BA, Class B, 2.760% 7/15/53 (c)		956,000		929,502
Series 2017-A, Class B, 3.500% 6/17/41 (c)		300,000		298,836
Series 2017-B, Class B, 3.500% 12/16/41 (c)		150,000		149,559
SoFi Professional Loan Program LLC
Series 2017-D, Class R1, 0.010% 9/25/40 (c)		1,000,000		345,020
Series 2018-A, Class R1, 0.010% 2/25/42 (c)		1,000,000		413,442
Series 2018-D, Class R1, 0.010% 2/25/48 (c)		968,900		214,224
Series 2019-A, Class R1, 0.010% 6/15/48 (c)		1,661,200		393,538
Series 2016-B, Class A1, 1 mo. USD LIBOR + 1.200% 1.348% FRN 6/25/33 (c)		56,046		56,226
Series 2019-C, Class BFX, 3.050% 11/16/48 (c)		646,000		663,601
Series 2017-D, Class BFX, 3.610% 9/25/40 (c)		500,000		496,336
South Carolina Student Loan Corp., Series 2010-1, Class A3, 3 mo. USD LIBOR + 1.050%
1.295% FRN 10/27/36		169,966		168,894
				21,353,953
Whole Loan Collateral Collateralized Mortgage Obligations — 0.2%
Countrywide Home Loans, Inc.
Series 2004-2, Class 1A1, 3.666% VRN 2/25/34 (f)		15,567		15,029
Series 2003-42, Class 1A1, 3.991% VRN 9/25/33 (f)		3,930		3,770
Deephaven Residential Mortgage Trust
Series 2018-1A, Class A1, 2.976% VRN 12/25/57 (c) (f)		148,743		149,672
Series 2018-1A, Class A3, 3.202% VRN 12/25/57 (c) (f)		42,498		42,518
Series 2019-1A, Class A3, 3.948% VRN 1/25/59 (c) (f)		139,333		140,863

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
GSR Mortgage Loan Trust, Series 2004-9, Class 2A1,
3.490% VRN 8/25/34 (f)	$	5,644	$	5,698
IndyMac Index Mortgage Loan Trust, Series 2004-AR4, Class 1A,
3.165% VRN 8/25/34 (f)		35,477		35,373
JP Morgan Mortgage Trust, Series 2017-1, Class A11,
3.500% VRN 1/25/47 (c) (f)		297,426		303,196
Merrill Lynch Mortgage Investors, Inc.
Series 2003-A4, Class IA, 3.032% VRN 7/25/33 (f)		1,970		1,878
Series 2004-A1, Class IA, 3.250% VRN 2/25/34 (f)		1,963		1,938
PSMC Trust, Series 2018-2, Class A1,
3.500% VRN 6/25/48 (c) (f)		284,942		290,015
Sequoia Mortgage Trust
Series 2018-CH2, Class A3, 4.000% VRN 6/25/48 (c) (f)		265,972		273,394
Series 2018-CH4, Class A2, 4.000% VRN 10/25/48 (c) (f)		133,799		136,531
Series 2019-1, Class A1, 4.000% VRN 2/25/49 (c) (f)		37,041		37,754
Structured Adjustable Rate Mortgage Loan Trust, Series 2004-2, Class 2A,
2.970% VRN 3/25/34 (f)		15,809		15,691
Washington Mutual Mortgage Pass-Through Certificates, Series 2004-AR2, Class A, 12 mo. MTA + 1.400%
2.419% FRN 4/25/44		45,318		43,342
Wells Fargo Mortgage Backed Securities Trust, Series 2019-1, Class A1,
4.000% VRN 11/25/48 (c) (f)		160,774		164,158
				1,660,820
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS   (Cost $78,486,947)				77,942,740
Sovereign Debt Obligations — 0.3%
Colombia Government International Bond
6.125% 1/18/41		620,000		795,150
Mexico Government International Bond
4.750% 3/08/44		824,000		898,572
6.750% 9/27/34		160,000		214,560
				1,908,282
TOTAL SOVEREIGN DEBT OBLIGATIONS   (Cost $1,630,907)				1,908,282
U.S. Government Agency Obligations and Instrumentalities — 7.9%
Collateralized Mortgage Obligations — 0.1%
Federal Home Loan Mortgage Corp.
Series 2617, Class Z, 5.500% 5/15/33		133,995		154,964
Series 2693, Class Z, 5.500% 10/15/33		245,045		278,236
				433,200
Pass-Through Securities — 7.6%
Federal Home Loan Mortgage Corp.
Pool #RA2483 3.500% 6/01/50		2,544,709		2,710,308
Pool #C55867 7.500% 2/01/30		24,937		28,111
Pool #C01079 7.500% 10/01/30		3,707		4,350
Pool #C01135 7.500% 2/01/31		14,720		17,168
Pool #C00470 8.000% 8/01/26		9,077		10,208
Pool #G00924 8.000% 3/01/28		8,423		9,471
Federal National Mortgage Association
Pool #MA3029 3.000% 6/01/32		637,262		671,715

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #MA3090 3.000% 8/01/32	$	273,042	$	287,804
Pool #725692 1 year CMT + 2.137% 3.138% FRN 10/01/33		22,485		23,552
Pool #888586 1 year CMT + 2.196% 3.326% FRN 10/01/34		47,383		49,931
Pool #AS1304 3.500% 12/01/28		150,985		162,352
Pool #AV1897 3.500% 12/01/28		25,733		27,670
Pool #AV2325 3.500% 12/01/28		81,830		87,991
Pool #MA1356 3.500% 2/01/43		1,183,563		1,284,626
Pool #CA6096 3.500% 6/01/50		2,330,810		2,505,069
Pool #FM4017 3.500% 8/01/50		199,704		211,514
Pool #CA1909 4.500% 6/01/48		1,100,805		1,191,926
Pool #AD6437 5.000% 6/01/40		56,661		64,944
Pool #AD6996 5.000% 7/01/40		372,608		427,073
Pool #AL8173 5.000% 2/01/44		148,326		168,756
Pool #564594 7.000% 1/01/31		8,366		9,615
Pool #572844 7.000% 4/01/31		19,217		22,571
Pool #253795 7.000% 5/01/31		29,734		34,676
Pool #499386 7.500% 9/01/29		1,009		1,172
Pool #521006 7.500% 12/01/29		394		462
Pool #522769 7.500% 12/01/29		55		64
Pool #252981 7.500% 1/01/30		4,828		5,613
Pool #524317 7.500% 3/01/30		903		1,061
Pool #530520 7.500% 3/01/30		9,039		10,392
Pool #253183 7.500% 4/01/30		1,733		2,015
Pool #253265 7.500% 5/01/30		925		1,076
Pool #536949 8.000% 5/01/30		1,253		1,479
Pool #535351 8.000% 6/01/30		1,822		2,124
Pool #253481 8.000% 10/01/30		1,251		1,467
Pool #190317 8.000% 8/01/31		543		635
Pool #602008 8.000% 8/01/31		1,908		2,231
Government National Mortgage Association I
Pool #337539 7.000% 7/15/23		126		133
Pool #363066 7.000% 8/15/23		2,030		2,135
Pool #354674 7.000% 10/15/23		1,530		1,612
Pool #352021 7.000% 11/15/23		972		1,022
Government National Mortgage Association II
Pool# MA6656 3.000% 5/20/50		2,412,332		2,531,567
Pool# MA6710 3.000% 6/20/50		2,427,318		2,552,603
Pool #MA4321 3.500% 3/20/47		1,677,691		1,794,659
Government National Mortgage Association II TBA
Pool #548 3.000% 8/01/49 (e)		575,000		601,998
Pool #1635 3.500% 6/01/49 (e)		16,430,000		17,302,844
Uniform Mortgage Backed Securities TBA
Pool #505 2.000% 5/01/35 (e)		8,525,000		8,862,003
Pool #1082 2.000% 4/01/50 (e)		3,850,000		3,981,141
Pool #17115 3.500% 4/01/49 (e)		7,300,000		7,695,797
Pool #21133 4.500% 9/01/48 (e)		575,000		621,943
				55,990,649
Whole Loans — 0.2%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes
Series 2020-DNA3, Class M1, 1 mo. USD LIBOR + 1.500% 1.648% FRN 6/25/50 (c)		650,000		651,093
Series 2019-DNA3, Class M2, 1 mo. USD LIBOR + 2.050% 2.198% FRN 7/25/49 (c)		253,097		247,942

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Federal National Mortgage Association Connecticut Avenue Securities Trust, Series 2019-R01, Class 2M2, 1 mo. USD LIBOR + 2.450%
2.598% FRN 7/25/31 (c)	$	338,557	$	335,926
				1,234,961
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES   (Cost $57,478,910)				57,658,810
U.S. Treasury Obligations — 1.0%
U.S. Treasury Bonds & Notes — 1.0%
U.S. Treasury Bond
2.250% 8/15/49 (g)		1,890,000		2,253,231
3.500% 2/15/39 (g)		2,120,000		2,978,432
U.S. Treasury Note
0.375% 4/30/25		2,400,000		2,414,284
				7,645,947
TOTAL U.S. TREASURY OBLIGATIONS   (Cost $7,192,522)				7,645,947
TOTAL BONDS & NOTES   (Cost $239,715,331)				246,246,257
TOTAL PURCHASED OPTIONS (#) — 0.1% (Cost $607,842)				398,474
	Number of Shares
Rights — 0.0%
Consumer, Non-cyclical — 0.0%
Pharmaceuticals — 0.0%
Bristol-Myers Squibb Co., Expires 3/31/21 (a)		25,576		57,546
TOTAL RIGHTS   (Cost $54,477)				57,546
Warrants — 0.0%
Energy — 0.0%
Oil & Gas — 0.0%
Occidental Petroleum Corp., Expires 8/03/27 (a)		453		1,359
TOTAL WARRANTS   (Cost $2,242)				1,359
Mutual Funds — 0.0%
Diversified Financial Services — 0.0%
State Street Navigator Securities Lending Prime Portfolio (h)		341,438		341,438
TOTAL MUTUAL FUNDS   (Cost $341,438)				341,438
TOTAL LONG-TERM INVESTMENTS   (Cost $556,674,270)				731,431,001

MML Blend Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Short-Term Investments — 5.7%
Commercial Paper — 5.2%
American Electric Power Co., Inc.
0.152% 10/27/20 (c)	$	1,000,000	$	999,858
American Honda Finance Corp.
0.315% 11/19/20		3,000,000		2,998,929
Avangrid, Inc.
0.223% 12/07/20 (c)		2,000,000		1,999,188
Bemis Co., Inc.
0.142% 10/05/20 (c)		1,000,000		999,981
0.172% 10/15/20 (c)		2,000,000		1,999,850
BPCE SA
0.203% 10/28/20 (c)		3,000,000		2,999,778
Dominion Resources, Inc.
0.203% 10/13/20		3,000,000		2,999,811
Duke Energy Corp.
0.223% 10/02/20 (c)		2,000,000		1,999,990
0.223% 1/05/21 (c)		1,000,000		999,356
Harley-Davidson Funding Corp.
0.304% 10/19/20 (c)		2,000,000		1,999,779
Intercontinental Exchange, Inc.
0.376% 11/13/20 (c) (i)		1,000,000		999,557
0.376% 12/03/20 (c) (i)		2,000,000		1,998,674
Keurig Dr Pepper, Inc.
0.193% 10/13/20 (c)		3,000,000		2,999,810
NRW. Bank
0.162% 11/03/20 (c)		3,000,000		2,999,660
Nutrien Ltd.
0.213% 12/21/20 (c)		3,000,000		2,998,463
Societe Generale SA
0.081% 10/06/20 (c)		1,000,000		999,983
Spire, Inc.
0.152% 10/15/20 (c)		1,000,000		999,925
0.183% 10/13/20 (c)		2,000,000		1,999,874
Suncor Energy, Inc.
0.223% 11/23/20 (c)		2,000,000		1,999,382
				37,991,848
Repurchase Agreement — 0.4%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/20, 0.000%, due 10/01/20 (j)		2,957,601		2,957,601
U.S. Treasury Bill — 0.1%
U.S. Treasury Bill
0.000% 10/06/20		1,000,000		999,991
TOTAL SHORT-TERM INVESTMENTS   (Cost $41,949,082)				41,949,440
TOTAL INVESTMENTS — 105.6% (Cost $598,623,352) (k)				773,380,441
Other Assets/(Liabilities) — (5.6)%				(41,126,795	)
NET ASSETS — 100.0%			$	732,253,646

MML Blend Fund — Portfolio of Investments (Continued)

Abbreviation Legend 

ARS	Auction Rate Security
BAB	Build America Bonds
CLO	Collateralized Loan Obligation
FRN	Floating Rate Note
STEP	Step Up Bond
TBA	To Be Announced
VRN	Variable Rate Note

Notes to Portfolio of Investments 

Percentages are stated as a percent of net assets. 

(a)	Non-income producing security.
(b)	Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2020, was $1,032,152 or 0.14% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $717,741 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).
(c)	Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At September 30, 2020, the aggregate market value of these securities amounted to $123,666,257 or 16.89% of net assets.
(d)	Security is perpetual and has no stated maturity date.
(e)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.
(f)	Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions. These securities do not indicate a reference rate and spread in their description above. The rates shown are the current interest rates at September 30, 2020.
(g)	A portion of this security is pledged/held as collateral for open derivatives.
(h)	Represents investment of security lending cash collateral. (Note 2).
(i)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At September 30, 2020, these securities amounted to a value of $2,998,231 or 0.41% of net assets.
(j)	Maturity value of $2,957,601. Collateralized by U.S. Government Agency obligations with a rate of 2.375%, maturity date of 3/15/22, and an aggregate market value, including accrued interest, of $3,016,793.
(k)	See Note 3 for aggregate cost for federal tax purposes.

MML Blend Fund — Portfolio of Investments (Continued)

(#) Interest Rate Swaptions Purchased 

			Paid by Fund		Received by Fund
Description	Counterparty	Expiration Date	Rate	Frequency	Rate	Frequency	Notional Amount		Value		Premium Paid (Received)			Unrealized Appreciation/ (Depreciation)
Call
10 Year Interest Rate Swap, 2/02/43	Credit Suisse International	1/31/33	3-Month USD LIBOR BBA	Quarterly	2.61%	Semi-Annually	USD	748,250	$	102,959	$	35,916	$	67,043
Put
10 Year Interest Rate Swap, 2/02/43	Credit Suisse International	1/31/33	3.11%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	USD	11,940,000	$	295,515	$	571,926	$	(276,411	)
									$	398,474	$	607,842	$	(209,368	)

Futures contracts  

	Expiration Date	Number of Contracts		Notional Amount			Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Long Bond	12/21/20		17	$	3,000,515		$	(3,734	)
U.S. Treasury Ultra Bond	12/21/20		61		13,725,893			(195,330	)
U.S. Treasury Note 2 Year	12/31/20		194		42,849,982			16,440
U.S. Treasury Note 5 Year	12/31/20		50		6,299,477			2,086
							$	(180,538	)
Short
90 Day Eurodollar	12/14/20		2	$	(487,568	)	$	(11,207	)
U.S. Treasury Ultra 10 Year	12/21/20		12		(1,915,012	)		(4,051	)
90 Day Eurodollar	3/15/21		2		(487,743	)		(11,282	)
90 Day Eurodollar	9/13/21		4		(975,637	)		(22,463	)
90 Day Eurodollar	3/14/22		4		(975,337	)		(22,463	)
90 Day Eurodollar	9/19/22		3		(731,203	)		(16,997	)
90 Day Eurodollar	3/13/23		3		(730,753	)		(17,147	)
90 Day Eurodollar	12/18/23		4		(973,436	)		(22,664	)
90 Day Eurodollar	12/16/24		10		(2,430,591	)		(54,784	)
							$	(183,058	)

Centrally Cleared Credit Default Swaps - Buy Protection
Reference Obligation/Index	Rate Paid by Fund	Payment Frequency	Termination Date	Notional Amount			Value			Upfront Premium Paid/ (Received)			Unrealized Appreciation (Depreciation)
CDX.NA.IG Series 35†	1.000%	Quarterly	12/20/2025	USD	1,000,000	$	(20,841	)	$	(24,501	)	$	3,660
CDX.NA.IG Series 35†	1.000%	Quarterly	12/20/2025	USD	1,100,000		(22,925	)		(26,286	)		3,361
						$	(43,766	)	$	(50,787	)	$	7,021

†  Payment is based on a percentage of the index. Reference entities are a number of individual issuers comprising the index.

Currency Legend 

USD U.S. Dollar

MML Dynamic Bond Fund — Portfolio of Investments

September 30, 2020 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 98.8%
BANK LOANS — 3.5%
Advertising — 0.0%
Clear Channel Outdoor Holdings, Inc., Term Loan B, 3 mo. LIBOR + 3.500% 3.761% VRN 8/21/26	$	9,900	$	8,987
Terrier Media Buyer, Inc., Term Loan B, 1 mo. LIBOR + 4.250% 4.397% VRN 12/17/26		59,550		57,997
				66,984
Aerospace & Defense — 0.0%
TransDigm, Inc., 2020 Term Loan F, 1 mo. LIBOR + 2.250% 2.397% VRN 12/09/25		170,450		160,862
Airlines — 0.0%
American Airlines, Inc., 2017 Incremental Term Loan, 1 mo. LIBOR + 2.000% 2.152% VRN 12/15/23		74,853		60,937
Kestrel Bidco Inc., Term Loan B, 6 mo. LIBOR + 3.000% 4.000% VRN 12/11/26		69,413		59,993
				120,930
Auto Parts & Equipment — 0.0%
Clarios Global LP, USD Term Loan B, 1 mo. LIBOR + 3.500% 3.647% VRN 4/30/26		39,600		38,523
Automotive & Parts — 0.1%
Tempo Acquisition LLC, 2020 Extended Term Loan, 1 mo. LIBOR + 3.250% 3.750% VRN 11/02/26		202,275		195,891
Biotechnology — 0.0%
Aldevron LLC, 2019 Term Loan B, 1 mo. LIBOR + 4.250% 5.250% VRN 10/12/26		109,475		109,429
Chemicals — 0.1%
Axalta Coating Systems US Holdings, Inc., USD Term Loan B3, 3 mo. LIBOR + 1.750% 1.970% VRN 6/01/24		274,958		268,134
GrafTech Finance, Inc., 2018 Term Loan B, 1 mo. LIBOR + 3.500% 4.500% VRN 2/12/25		40,228		39,658
				307,792
Commercial Services — 0.1%
AlixPartners LLP, 2017 Term Loan B, 1 mo. LIBOR + 2.500% 2.647% VRN 4/04/24		222,845		217,100
Allied Universal Holdco LLC, 2019 Term Loan B, 1 mo. LIBOR + 4.250% 4.397% VRN 7/10/26		129,025		127,459
Mister Car Wash Holdings, Inc., 2019 Term Loan B, 0.000% 5/14/26 (a)		64,836		61,165

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Prime Security Services Borrower LLC, 2019 Term Loan B1, 1 mo. LIBOR + 3.250%, 3 mo. LIBOR + 3.250%, 12 mo. LIBOR + 3.250% 4.250% VRN 9/23/26	$	64,511	$	63,855
				469,579
Computers — 0.0%
Flexential Intermediate Corp., 2017 1st Lien Term Loan, 3 mo. LIBOR + 3.500% 3.720% VRN 8/01/24		29,770		25,388
Surf Holdings, LLC, USD Term Loan, 3 mo. LIBOR + 3.500% 3.750% VRN 3/05/27		129,675		126,595
				151,983
Distribution & Wholesale — 0.1%
American Tire Distributors Holdings, Inc., 2015 Term Loan, 1 mo. LIBOR + 7.500%, 3 mo. LIBOR + 7.500% 8.500% VRN 9/02/24		29,699		25,159
HD Supply, Inc., Term Loan B5, 1 mo. LIBOR + 1.750% 1.897% VRN 10/17/23		320,101		318,785
				343,944
Diversified Financial Services — 0.1%
Blackhawk Network Holdings, Inc., 2018 1st Lien Term Loan, 1 mo. LIBOR  + 3.000% 3.147% VRN 6/15/25		115,431		108,541
Deerfield Dakota Holding, LLC, 2020 USD Term Loan B, 1 mo. LIBOR + 3.750% 4.750% VRN 4/09/27		109,725		108,925
				217,466
Electric — 0.1%
Calpine Corp., Term Loan B9, 1 mo. LIBOR + 2.250% 2.400% VRN 4/05/26		312,300		303,581
Electronics — 0.0%
Compass Power Generation LLC, 2018 Term Loan B, 1 mo. LIBOR + 3.500% 4.500% VRN 12/20/24		54,198		53,182
Tech Data Corp., ABL Term Loan, 1 mo. LIBOR + 3.500% 3.645% VRN 6/30/25		105,000		105,184
				158,366
Engineering & Construction — 0.0%
Brand Energy & Infrastructure Services, Inc., 2017 Term Loan, 3 mo. LIBOR + 4.250% 5.250% VRN 6/21/24		64,602		59,989
Entertainment — 0.0%
Playtika Holding Corp., Term Loan B, 0.000% 12/10/24 (a)		44,423		44,407
Environmental Controls — 0.1%
Filtration Group Corp., 2018 1st Lien Term Loan, 1 mo. LIBOR + 3.000% 3.147% VRN 3/29/25		201,385		197,138

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Foods — 0.2%
Froneri International Ltd., 2020 USD Term Loan, 1 mo. LIBOR + 2.250% 2.397% VRN 1/31/27	$	239,400	$	229,568
Hearthside Food Solutions LLC, 2018 Term Loan B, 1 mo. LIBOR + 3.687% 3.834% VRN 5/23/25		49,556		48,018
JBS USA LUX SA/JBS USA Finance, Inc., 2019 Term Loan B, 1 mo. LIBOR + 2.000% 2.147% VRN 5/01/26		253,712		246,482
United Natural Foods, Inc., Term Loan B, 1 mo. LIBOR + 4.250% 4.397% VRN 10/22/25		28,564		27,783
				551,851
Gas — 0.0%
Pacific Gas & Electric Company, 2020 Exit Term Loan B, 3 mo. LIBOR + 4.500% 5.500% VRN 6/23/25		74,813		73,191
Health Care – Products — 0.1%
Sotera Health Holdings, LLC, 2019 Term Loan, 3 mo. LIBOR + 4.500% 5.500% VRN 12/11/26		169,150		168,304
Health Care – Services — 0.2%
Air Methods Corp., 2017 Term Loan B, 3 mo. LIBOR + 3.500% 4.500% VRN 4/22/24		54,577		47,610
Envision Healthcare Corp., 2018 1st Lien Term Loan, 1 mo. LIBOR + 3.750% 3.897% VRN 10/10/25		44,659		32,115
Gentiva Health Services, Inc., 2020 Term Loan, 1 mo. LIBOR + 3.250% 3.438% VRN 7/02/25		198,592		194,249
Global Medical Response, Inc., 2018 Term Loan B1, 3 mo. LIBOR + 3.250% 4.250% VRN 4/28/22		59,541		59,327
RegionalCare Hospital Partners Holdings, Inc., 2018 Term Loan B, 1 mo. LIBOR + 3.750% 3.897% VRN 11/16/25		110,000		106,700
Select Medical Corporation, 2017 Term Loan B, 3 mo. LIBOR + 2.500% 2.780% VRN 3/06/25		115,000		111,694
Team Health Holdings, Inc., 1st Lien Term Loan, 1 mo. LIBOR + 2.750% 3.750% VRN 2/06/24		24,807		20,741
				572,436
Household Products & Wares — 0.0%
Diamond (BC) B.V., USD Term Loan, 3 mo. LIBOR + 3.000% 3.261% VRN 9/06/24		74,338		69,320
Kronos Acquisition Holdings, Inc., 2015 Term Loan B, 3 mo. LIBOR + 4.000% 5.000% VRN 5/15/23		49,938		49,552
				118,872
Insurance — 0.2%
Acrisure LLC, 2020 Term Loan B, 1 mo. LIBOR + 3.500% 3.647% VRN 2/15/27		123,742		119,256
AssuredPartners, Inc., 2020 Term Loan B, 1 mo. LIBOR + 3.500% 3.647% VRN 2/12/27		242,459		235,098
Asurion LLC
2018 Term Loan B6, 1 mo. LIBOR + 3.000% 3.147% VRN 11/03/23		104,446		102,793

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
2017 2nd Lien Term Loan, 1 mo. LIBOR + 6.500% 6.647% VRN 8/04/25	$	46,970	$	46,980
Sedgwick Claims Management Services, Inc., 2019 Term Loan B, 1 mo. LIBOR + 4.000% 4.147% VRN 9/03/26		34,563		34,006
				538,133
Internet — 0.1%
Go Daddy Operating Company, LLC
2017 Repriced Term Loan, 1 mo. LIBOR + 1.750% 1.897% VRN 2/15/24		243,325		238,229
2020 Term Loan B3, 1 mo. LIBOR + 2.500% 2.647% VRN 8/10/27		84,788		83,428
ION Trading Technologies S.a.r.l., USD Incremental Term Loan B, 3 mo. LIBOR + 4.000% 5.000% VRN 11/21/24		19,794		19,390
Uber Technologies, Inc., 2018 Term Loan, 1 mo. LIBOR + 4.000% 5.000% VRN 4/04/25		114,075		113,035
Web.com Group, Inc., 2018 Term Loan B, 1 mo. LIBOR + 3.750% 3.901% VRN 10/10/25		40,000		38,570
				492,652
Investment Companies — 0.1%
Solenis Holdings LLC, 2018 1st Lien Term Loan, 3 mo. LIBOR + 4.000% 4.256% VRN 6/26/25		74,429		72,568
UFC Holdings LLC, 2019 Term Loan, 6 mo. LIBOR + 3.250% 4.250% VRN 4/29/26		197,747		194,040
				266,608
Leisure Time — 0.0%
ClubCorp Holdings, Inc., 2017 Term Loan B, 3 mo. LIBOR + 2.750% 2.970% VRN 9/18/24		34,731		29,565
Equinox Holdings, Inc., 2017 1st Lien Term Loan, 3 mo. LIBOR + 3.000% 4.000% VRN 3/08/24		44,087		33,677
				63,242
Lodging — 0.1%
Caesars Resort Collection, LLC
2017 1st Lien Term Loan B, 1 mo. LIBOR + 2.750% 2.897% VRN 12/23/24		158,372		147,986
2020 Term Loan, 1 mo. LIBOR + 4.500%, 3 mo. LIBOR + 4.500% 4.647% VRN 7/21/25		60,000		57,983
Golden Nugget, Inc., 2017 Incremental Term Loan B, 1 mo. LIBOR + 2.500%, 2 mo. LIBOR + 2.500% 3.250% VRN 10/04/23		154,565		137,399
Hilton Worldwide Finance LLC, 2019 Term Loan B2, 1 mo. LIBOR + 1.750% 1.898% VRN 6/22/26		65,000		62,636
				406,004
Machinery - Diversified — 0.1%
Titan Acquisition Ltd., 2018 Term Loan B, 3 mo. LIBOR + 3.000% 3.220% VRN 3/28/25		39,649		37,357

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Vertical US Newco, Inc., USD Term Loan B, 6 mo. LIBOR + 4.250% 4.570% VRN 7/30/27	$	200,000	$	198,108
				235,465
Media — 0.2%
Cengage Learning, Inc., 2016 Term Loan B, 3 mo. LIBOR + 4.250% 5.250% VRN 6/07/23		74,302		61,936
CSC Holdings LLC, 2019 Term Loan B5, 1 mo. LIBOR + 2.500% 2.652% VRN 4/15/27		203,208		196,647
E.W. Scripps Co.(The), 2019 Term Loan B2, 1 mo. LIBOR + 2.500% 2.647% VRN 5/01/26		307,051		298,703
Getty Images, Inc., 2019 USD Term Loan B, 1 mo. LIBOR + 4.500% 4.688% VRN 2/19/26		34,361		31,955
Radiate Holdco, LLC
2020 Term Loan, 0.000% 9/25/26 (a)		135,000		132,469
1st Lien Term Loan, 1 mo. LIBOR + 3.000% 3.750% VRN 2/01/24		99,487		97,715
				819,425
Oil & Gas Services — 0.0%
Illuminate Buyer, LLC, Term Loan, 1 Week LIBOR + 4.000% 4.220% VRN 6/16/27		85,000		84,203
Packaging & Containers — 0.1%
Charter NEX US, Inc., Incremental Term Loan, 1 mo. LIBOR + 3.250% 3.397% VRN 5/16/24		49,039		47,762
Flex Acquisition Co., Inc.
2018 Incremental Term Loan, 3 mo. LIBOR + 3.250% 3.546% VRN 6/29/25		25,000		24,219
1st Lien Term Loan, 3 mo. LIBOR + 3.000% 4.000% VRN 12/29/23		72,249		70,533
Graham Packaging Company, Inc. ., Term Loan, 1 mo. LIBOR + 3.750% 4.500% VRN 8/04/27		80,000		79,433
Klockner-Pentaplast of America, Inc., USD 2017 Term Loan B2, 6 mo. LIBOR + 4.250% 5.250% VRN 6/30/22		9,834		9,531
				231,478
Pharmaceuticals — 0.1%
HC Group Holdings II, Inc., Term Loan B, 1 mo. LIBOR + 4.500% 4.647% VRN 8/06/26		154,611		152,936
Parexel International Corp., Term Loan B, 1 mo. LIBOR + 2.750% 2.897% VRN 9/27/24		155,000		148,510
				301,446
Pipelines — 0.0%
Blackstone CQP Holdco LP, Term Loan B, 3 mo. LIBOR + 3.500% 3.725% VRN 9/30/24		79,397		77,591
Buckeye Partners LP, 2019 Term Loan B, 1 mo. LIBOR + 2.750% 2.897% VRN 11/01/26		69,650		68,257
				145,848

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Retail — 0.1%
Asplundh Tree Expert LLC, Term Loan B, 3 mo. LIBOR + 2.500% 2.655% VRN 9/07/27	$	70,000	$	69,869
Bass Pro Group, LLC, Term Loan B, 3 mo. LIBOR + 5.000% 5.750% VRN 9/25/24		59,692		59,059
IRB Holding Corp, 2020 Term Loan B, 3 mo. LIBOR + 2.750% 3.750% VRN 2/05/25		153,317		146,140
PetSmart, Inc., Consenting Term Loan, 3 mo. LIBOR + 3.500% 4.500% VRN 3/11/22		182,661		182,105
				457,173
Software — 0.8%
Ascend Learning LLC, 2017 Term Loan B, 1 mo. LIBOR + 3.000% 4.000% VRN 7/12/24		158,242		155,868
Camelot U.S. Acquisition 1 Co., Term Loan B, 0.000% 10/30/26 (a)		120,000		119,350
Castle US Holding Corp., USD Term Loan B, 3 mo. LIBOR + 3.750% 3.970% VRN 1/29/27		159,333		152,818
Cornerstone OnDemand, Inc., Term Loan B, 1 mo. LIBOR + 4.250% 4.406% VRN 4/22/27		90,000		89,756
Cvent, Inc., 1st Lien Term Loan, 1 mo. LIBOR + 3.750% 3.897% VRN 11/29/24		99,237		89,383
Dun & Bradstreet Corp. (The), Term Loan, 1 mo. LIBOR + 3.750% 3.895% VRN 2/06/26		154,225		152,451
Finastra USA, Inc.
USD 1st Lien Term Loan, 3 mo. LIBOR + 3.500%, 6 mo. LIBOR + 3.500% 4.500% VRN 6/13/24		64,019		59,713
USD 2nd Lien Term Loan, 6 mo. LIBOR + 7.250% 8.250% VRN 6/13/25		20,000		18,730
Greeneden U.S. Holdings II, LLC, 2018 USD Term Loan B, 1 mo. LIBOR + 3.250% 3.397% VRN 12/01/23		153,399		152,888
Hyland Software, Inc., 2018 1st Lien Term Loan, 1 mo. LIBOR + 3.250% 4.000% VRN 7/01/24		223,118		221,956
Milano Acquisition Corp, Term Loan B, 0.000% 10/01/27 (a)		125,000		123,437
Mitchell International, Inc., 2017 1st Lien Term Loan, 1 mo. LIBOR + 3.250% 3.397% VRN 11/29/24		148,855		141,987
Project Alpha Intermediate Holding, Inc., 2017 Term Loan B, 3 mo. LIBOR + 3.500% 4.500% VRN 4/26/24		188,745		184,970
Solera LLC, USD Term Loan B, 2 mo. LIBOR + 2.750% 2.938% VRN 3/03/23		198,442		194,088
Sophia, L.P.
2020 1st Lien Term Loan, 0.000% 10/07/27 (a)		150,000		148,912
2017 Term Loan B, 1 mo. LIBOR + 3.250% 4.250% VRN 9/30/22		199,597		198,557
Tibco Software, Inc., 2020 Term Loan B, 1 mo. LIBOR + 3.750% 3.900% VRN 6/30/26		129,638		126,235
Ultimate Software Group, Inc. (The)
Term Loan B, 1 mo. LIBOR + 3.750% 3.897% VRN 5/04/26		139,083		137,732
2020 Incremental Term Loan B, 3 mo. LIBOR + 4.000% 4.750% VRN 5/04/26		105,000		104,620

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
VS Buyer, LLC, Term Loan B, 1 mo. LIBOR + 3.250% 3.397% VRN 2/28/27	$	149,300	$	146,438
				2,719,889
Telecommunications — 0.4%
Altice France S.A., 2018 Term Loan B13, 1 mo. LIBOR + 4.000% 4.152% VRN 8/14/26		154,494		149,775
Avaya, Inc., 2018 Term Loan B, 1 mo. LIBOR + 4.250% 4.401% VRN 12/15/24		70,000		69,541
CenturyLink, Inc., 2020 Term Loan B, 1 mo. LIBOR + 2.250% 2.397% VRN 3/15/27		223,872		214,718
Intelsat Jackson Holdings S.A.
2020 DIP Term Loan, 3 mo. LIBOR + 5.500% 6.500% VRN 7/13/22 (b)		23,306		23,675
2017 Term Loan B3, PRIME + 4.750% 8.000% 11/27/23		155,000		155,538
Level 3 Financing, Inc., 2019 Term Loan B, 1 mo. LIBOR + 1.750% 1.897% VRN 3/01/27		250,000		241,952
MLN US HoldCo LLC, 2018 1st Lien Term Loan, 1 mo. LIBOR + 4.500% 4.656% VRN 11/30/25		19,798		16,859
Nexstar Broadcasting, Inc., 2019 Term Loan B4, 1 mo. LIBOR + 2.750% 2.899% VRN 9/18/26		196,160		191,584
T-Mobile USA, Inc., 2020 Term Loan, 1 mo. LIBOR + 3.000% 3.147% VRN 4/01/27		84,788		84,659
Virgin Media Bristol LLC, USD Term Loan N, 1 mo. LIBOR + 2.500% 2.652% VRN 1/31/28		100,000		96,917
Zayo Group Holdings, Inc., USD Term Loan, 1 mo. LIBOR + 3.000% 3.147% VRN 3/09/27		228,850		221,781
				1,466,999
TOTAL BANK LOANS (Cost $12,864,397)				12,660,083
CORPORATE DEBT — 24.9%
Advertising — 0.1%
The Interpublic Group of Cos., Inc.
5.400% 10/01/48		300,000		353,169
Aerospace & Defense — 0.3%
Bombardier, Inc.
6.000% 10/15/22 (c)		90,000		83,475
Lockheed Martin Corp.
4.700% 5/15/46		315,000		429,245
Northrop Grumman Corp.
5.150% 5/01/40		250,000		336,052
TransDigm, Inc.
5.500% 11/15/27		100,000		96,105
6.250% 3/15/26 (c)		150,000		156,644
6.375% 6/15/26		60,000		60,236
8.000% 12/15/25 (c)		15,000		16,312
Triumph Group, Inc.
7.750% 8/15/25		55,000		35,269
				1,213,338

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Agriculture — 0.4%
Altria Group, Inc. 4.800% 2/14/29	$	475,000	$	563,633
BAT Capital Corp. 3.462% 9/06/29		695,000		740,024
Imperial Brands Finance PLC 3.500% 7/26/26 (c)		265,000		286,688
				1,590,345
Airlines — 0.1%
Delta Air Lines, Inc./SkyMiles IP Ltd. 4.750% 10/20/28 (c)		40,000		41,531
Latam Finance Ltd. 6.875% 4/11/24 (c) (d)		200,000		74,000
7.000% 3/01/26 (c) (d)		300,000		111,000
Southwest Airlines Co. 4.750% 5/04/23		235,000		251,171
				477,702
Apparel — 0.1%
The William Carter Co. 5.500% 5/15/25 (c)		185,000		193,788
Auto Manufacturers — 0.4%
Ford Motor Co. 9.000% 4/22/25		65,000		74,523
Ford Motor Credit Co. LLC 5.750% 2/01/21		200,000		201,250
General Motors Financial Co., Inc. 3 mo. USD LIBOR + .990% 1.294% FRN 1/05/23		575,000		568,774
Hyundai Capital America 1.800% 10/15/25 (c)		5,000		4,974
2.650% 2/10/25 (c)		460,000		473,708
Volkswagen Group of America Finance LLC 4.250% 11/13/23 (c)		220,000		241,733
				1,564,962
Auto Parts & Equipment — 0.0%
Clarios Global LP/Clarios US Finance Co. 6.250% 5/15/26 (c)		115,000		120,583
Banks — 3.9%
Banco de Credito del Peru 5 year CMT + 3.000% 3.125% VRN 7/01/30 (c)		200,000		200,626
Banco de Credito del Peru/Panama 3 mo. USD LIBOR + 7.043% 6.125% VRN 4/24/27 (c)		150,000		157,875
Banco de Reservas de la Republica Dominicana 7.000% 2/01/23 (c)		200,000		205,500
Banco Macro SA 5 year USD Swap + 5.463% 6.750% VRN 11/04/26 (c)		200,000		153,800
Banco Mercantil del Norte SA/Grand Cayman 10 year CMT + 5.353% 7.625% VRN (c) (e)		400,000		398,760
Banco Nacional de Panama 2.500% 8/11/30 (c)		200,000		197,900
Banco Santander SA 3 mo. USD LIBOR + 1.090% 1.346% FRN 2/23/23		400,000		400,903

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Bancolombia SA 3.000% 1/29/25	$	200,000	$	200,324
Bank of America Corp. 3 mo. USD LIBOR + 1.210% 3.974% VRN 2/07/30		350,000		405,578
Bank of Montreal 5 year USD Swap + 1.432% 3.803% VRN 12/15/32		300,000		334,376
Bank of New Zealand 3.500% 2/20/24 (c)		530,000		577,249
The Bank of Nova Scotia 1.625% 5/01/23		217,000		222,661
Barclays PLC 3 mo. USD LIBOR + 1.380% 1.660% FRN 5/16/24		425,000		426,158
BDO Unibank, Inc. 2.950% 3/06/23 (c)		300,000		311,261
BNP Paribas SA SOFR + 1.507% 3.052% VRN 1/13/31 (c)		390,000		418,261
Citigroup, Inc. 3 mo. USD LIBOR + 1.100% 1.380% FRN 5/17/24		635,000		640,551
Commonwealth Bank of Australia 4.316% 1/10/48 (c)		505,000		615,965
Credit Agricole SA 3.750% 4/24/23 (c)		535,000		573,323
Credit Suisse Group AG 3 mo. USD LIBOR + 1.240% 1.489% FRN 6/12/24 (c)		430,000		433,504
DBS Group Holdings Ltd. 5 year USD Swap + 2.390% 3.600% VRN (c) (e)		600,000		603,000
Gilex Holding Sarl 8.500% 5/02/23 (c)		150,000		152,626
8.500% 5/02/23 (c)		150,000		152,626
HSBC Holdings PLC 3 mo. USD LIBOR + 1.380% 1.629% FRN 9/12/26		835,000		827,287
JP Morgan Chase & Co. SOFR + 2.040% 2.522% VRN 4/22/31		275,000		292,620
Lloyds Banking Group PLC 3 mo. USD LIBOR + 1.205% 3.574% VRN 11/07/28		400,000		438,233
Macquarie Group Ltd. 3 mo. USD LIBOR + 1.023% 3.189% VRN 11/28/23 (c)		160,000		167,302
3 mo. USD LIBOR + 1.330% 4.150% VRN 3/27/24 (c)		280,000		300,166
Malayan Banking Bhd 5 year USD Swap + 2.542% 3.905% VRN 10/29/26 (c)		300,000		305,967
Mitsubishi UFJ Financial Group, Inc. 1.412% 7/17/25		435,000		441,086
Morgan Stanley 3 mo. USD LIBOR + 1.340% 3.591% VRN 7/22/28		230,000		258,679
Multibank, Inc. 4.375% 11/09/22 (c)		200,000		203,100
NongHyup Bank 1.250% 7/20/25 (c)		200,000		201,926
Sumitomo Mitsui Financial Group, Inc. 3 mo. USD LIBOR + .740% 1.013% FRN 1/17/23		715,000		718,185
The Bank of Nova Scotia 3.400% 2/11/24		100,000		108,643
The Goldman Sachs Group, Inc. 3 mo. USD LIBOR + 1.170% 1.450% FRN 5/15/26		565,000		570,492
Union Bank of the Philippines 3.369% 11/29/22 (c)		400,000		415,898
United Overseas Bank Ltd. 5 year USD Swap + 1.654% 2.880% VRN 3/08/27 (c)		200,000		203,548

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
5 year USD Swap + 1.794% 3.875% VRN (c) (e)	$	300,000	$	306,915
Wells Fargo & Co. 3 mo. USD LIBOR + 1.170% 2.879% VRN 10/30/30		115,000		123,498
3 mo. USD LIBOR + 1.170% 3.196% VRN 6/17/27		245,000		267,376
				13,933,748
Beverages — 0.3%
Anheuser-Busch InBev Worldwide, Inc. 4.600% 4/15/48		440,000		524,676
Constellation Brands, Inc. 2.875% 5/01/30		25,000		26,993
3.150% 8/01/29		200,000		218,320
Keurig Dr Pepper, Inc. 3.800% 5/01/50		140,000		161,073
				931,062
Biotechnology — 0.1%
Royalty Pharma PLC 3.300% 9/02/40 (c)		235,000		233,054
Building Materials — 0.2%
Builders FirstSource, Inc. 5.000% 3/01/30 (c)		80,000		82,800
6.750% 6/01/27 (c)		110,000		117,838
Carrier Global Corp. 3.377% 4/05/40 (c)		310,000		324,794
Griffon Corp. 5.750% 3/01/28		170,000		177,451
Owens Corning 4.400% 1/30/48		175,000		194,897
				897,780
Chemicals — 0.6%
Braskem Netherlands Finance BV 5 year CMT + 8.220% 8.500% VRN 1/23/81 (c)		200,000		201,802
CNAC HK Finbridge Co. Ltd. 3.375% 6/19/24 (c)		200,000		207,790
DuPont de Nemours, Inc. 5.419% 11/15/48		205,000		274,116
MEGlobal Canada ULC 5.000% 5/18/25 (c)		400,000		431,086
Nutrien Ltd. 4.200% 4/01/29		265,000		315,176
Syngenta Finance NV 5.676% 4/24/48 (c)		200,000		214,394
UPL Corp. Ltd. 3.250% 10/13/21 (c)		200,000		202,506
WR Grace & Co-Conn 4.875% 6/15/27 (c)		165,000		170,395
				2,017,265
Coal — 0.0%
Peabody Energy Corp. 6.000% 3/31/22 (c)		105,000		60,900

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
SunCoke Energy Partners LP/SunCoke Energy Partners Finance Corp. 7.500% 6/15/25 (c)	$	120,000	$	108,242
				169,142
Commercial Services — 0.3%
Allied Universal Holdco LLC / Allied Universal Finance Corp. 6.625% 7/15/26 (c)		70,000		74,550
9.750% 7/15/27 (c)		130,000		141,248
Garda World Security Corp. 8.750% 5/15/25 (c)		95,000		95,950
Jaguar Holding Co. II / Pharmaceutical Product Development LLC 5.000% 6/15/28 (c)		50,000		52,187
MPH Acquisition Holdings LLC 7.125% 6/01/24 (c)		160,000		164,376
Prime Security Services Borrower LLC / Prime Finance, Inc. 3.375% 8/31/27 (c)		110,000		105,517
PSA Treasury Pte Ltd. 2.125% 9/05/29 (c)		200,000		208,454
Verscend Escrow Corp. 9.750% 8/15/26 (c)		237,000		257,688
				1,099,970
Computers — 0.1%
NetApp, Inc. 1.875% 6/22/25		230,000		238,233
Tempo Acquisition LLC / Tempo Acquisition Finance Corp. 6.750% 6/01/25 (c)		190,000		193,916
				432,149
Distribution & Wholesale — 0.0%
Performance Food Group, Inc. 5.500% 10/15/27 (c)		115,000		118,450
Diversified Financial Services — 1.7%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust 3.500% 1/15/25		450,000		438,392
Air Lease Corp. 3.750% 2/01/22		470,000		479,590
Avolon Holdings Funding Ltd. 3.250% 2/15/27 (c)		390,000		347,931
Banco BTG Pactual SA 5 year CMT + 5.257% 7.750% VRN 2/15/29 (c)		200,000		205,750
BOC Aviation Ltd. 3 mo. USD LIBOR + 1.125% 1.358% FRN 9/26/23 (c)		565,000		551,813
Capital One Financial Corp. 3 mo. USD LIBOR + .720% 0.988% FRN 1/30/23		140,000		140,067
Credito Real SAB de CV SOFOM ER 5 year CMT + 7.026% 9.125% VRN (c) (e)		200,000		151,002
Discover Financial Services 4.100% 2/09/27		570,000		632,112
Global Aircraft Leasing Co. Ltd. 6.500% 9/15/24 (c)		108,806		60,659
Interoceanica IV Finance Ltd. 0.000% 11/30/25 (c)		712,411		658,652
Mexarrend SAPI de CV 10.250% 7/24/24 (c)		200,000		147,500

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Nationstar Mortgage Holdings, Inc. 5.500% 8/15/28 (c)	$	75,000	$	74,906
Navient Corp. 5.000% 3/15/27		60,000		56,342
NFP Corp. 6.875% 8/15/28 (c)		70,000		70,866
OneMain Finance Corp. 5.375% 11/15/29		55,000		57,200
6.625% 1/15/28		120,000		133,176
Operadora de Servicios Mega SA de CV Sofom ER 8.250% 2/11/25 (c)		200,000		184,000
PennyMac Financial Services, Inc. 5.375% 10/15/25 (c)		75,000		75,938
SPARC EM SPC Panama Metro Line 2 SP 0.010% 12/05/22 (c)		190,236		184,293
Synchrony Financial 3.950% 12/01/27		420,000		451,971
The Charles Schwab Corp. 3.550% 2/01/24		465,000		507,864
Unifin Financiera SAB de CV 5 year CMT + 6.308% 8.875% VRN (c) (e)		600,000		409,500
				6,019,524
Electric — 3.0%
AES Andres BV/Dominican Power Partners/Empresa Generadora de Electricidad It 7.950% 5/11/26 (c)		500,000		508,130
AES Argentina Generacion SA 7.750% 2/02/24 (c)		150,000		103,781
AES Gener SA 5 year CMT + 4.917% 6.350% VRN 10/07/79 (c)		200,000		201,750
5 year USD Swap + 4.644% 7.125% VRN 3/26/79 (c)		400,000		408,914
AES Panama Generation Holdings SRL 4.375% 5/31/30 (c)		200,000		205,250
American Electric Power Co., Inc. 2.950% 12/15/22		313,000		327,401
Arizona Public Service Co. 3.350% 5/15/50		130,000		143,180
Calpine Corp. 4.625% 2/01/29 (c)		40,000		39,925
5.125% 3/15/28 (c)		100,000		103,500
DTE Energy Co. 3.800% 3/15/27		500,000		558,285
Duke Energy Corp. 3.750% 9/01/46		90,000		102,745
3.950% 8/15/47		240,000		283,503
Duke Energy Progress, Inc. 4.150% 12/01/44		315,000		392,690
Empresa Electrica Angamos SA 4.875% 5/25/29 (c)		156,500		156,696
Empresa Electrica Guacolda SA 4.560% 4/30/25 (c)		400,000		327,061
Entergy Corp. 2.800% 6/15/30		110,000		118,919
Eversource Energy 1.650% 8/15/30		250,000		247,713
FirstEnergy Corp. 2.250% 9/01/30		60,000		58,682

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Georgia Power Co. 2.200% 9/15/24	$	385,000	$	406,153
Korea East-West Power Co. Ltd. 1.750% 5/06/25 (c)		200,000		206,656
LLPL Capital Pte Ltd. 6.875% 2/04/39 (c)		281,700		324,352
Minejesa Capital BV 4.625% 8/10/30 (c)		400,000		411,044
Monongahela Power Co. 5.400% 12/15/43 (c)		145,000		204,098
NextEra Energy Capital Holdings, Inc. 2.250% 6/01/30		750,000		776,646
3.550% 5/01/27		195,000		220,399
Pampa Energia SA 9.125% 4/15/29 (c)		150,000		117,057
PG&E Corp. 5.000% 7/01/28		45,000		43,650
Pike Corp. 5.500% 9/01/28 (c)		85,000		85,526
Pinnacle West Capital Corp. 1.300% 6/15/25		230,000		233,655
PSEG Power LLC 3.850% 6/01/23		340,000		365,797
Sierra Pacific Power Co. 2.600% 5/01/26		1,000,000		1,089,884
State Grid Overseas Investment Ltd. 3.125% 5/22/23 (c)		200,000		210,794
3.750% 5/02/23 (c)		200,000		213,872
Transelec SA 3.875% 1/12/29 (c)		250,000		272,875
Xcel Energy, Inc. 3.300% 6/01/25		1,000,000		1,103,560
				10,574,143
Electrical Components & Equipment — 0.0%
Energizer Holdings, Inc. 4.750% 6/15/28 (c)		110,000		113,839
Electronics — 0.2%
Arrow Electronics, Inc. 3.875% 1/12/28		195,000		216,195
Roper Technologies, Inc. 1.750% 2/15/31		510,000		510,275
				726,470
Engineering & Construction — 0.2%
Sydney Airport Finance Co. Pty Ltd. 3.375% 4/30/25 (c)		300,000		317,189
3.625% 4/28/26 (c)		300,000		324,270
				641,459
Entertainment — 0.3%
Caesars Entertainment, Inc. 6.250% 7/01/25 (c)		105,000		109,751
Caesars Resort Collection LLC/CRC Finco, Inc. 5.250% 10/15/25 (c)		130,000		125,775

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Cedar Fair LP 5.250% 7/15/29	$	75,000	$	72,000
Lions Gate Capital Holdings LLC 6.375% 2/01/24 (c)		160,000		158,400
Live Nation Entertainment, Inc. 6.500% 5/15/27 (c)		90,000		97,132
Scientific Games International, Inc. 7.250% 11/15/29 (c)		75,000		76,125
Six Flags Theme Parks, Inc. 7.000% 7/01/25 (c)		180,000		191,475
Twin River Worldwide Holdings, Inc. 6.750% 6/01/27 (c)		110,000		109,436
				940,094
Environmental Controls — 0.1%
GFL Environmental, Inc. 3.750% 8/01/25 (c)		100,000		100,552
4.250% 6/01/25 (c)		80,000		80,800
5.125% 12/15/26 (c)		125,000		129,075
8.500% 5/01/27 (c)		51,000		55,335
Tervita Corp. 7.625% 12/01/21 (c)		105,000		95,813
				461,575
Foods — 0.6%
Albertsons Cos., Inc. / Safeway, Inc. / New Albertsons LP / Albertson's LLC 3.500% 3/15/29 (c)		75,000		72,797
4.625% 1/15/27 (c)		95,000		97,203
B&G Foods, Inc. 5.250% 9/15/27		50,000		52,166
Campbell Soup Co. 2.375% 4/24/30		115,000		119,583
JBS USA LUX SA/JBS USA Finance, Inc. 5.750% 6/15/25 (c)		20,000		20,616
5.875% 7/15/24 (c)		15,000		15,302
6.750% 2/15/28 (c)		126,000		137,015
Kraft Heinz Foods Co. 5.000% 7/15/35		40,000		46,060
5.200% 7/15/45		115,000		125,722
The Kroger Co. 3.400% 4/15/22		195,000		202,271
Mondelez International, Inc. 1.500% 5/04/25		130,000		133,593
1.875% 10/15/32 (f)		240,000		239,563
Pilgrim's Pride Corp. 5.875% 9/30/27 (c)		85,000		87,763
Post Holdings, Inc. 4.625% 4/15/30 (c)		110,000		113,162
Smithfield Foods, Inc. 4.250% 2/01/27 (c)		415,000		453,458
Sysco Corp. 3.300% 2/15/50		380,000		356,555
US Foods, Inc. 6.250% 4/15/25 (c)		15,000		15,881
				2,288,710

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Gas — 0.3%
The Brooklyn Union Gas Co. 4.487% 3/04/49 (c)	$	335,000	$	430,548
The East Ohio Gas Co. 3.000% 6/15/50 (c)		245,000		248,548
ENN Energy Holdings Ltd. 3.250% 7/24/22 (c)		200,000		205,408
NiSource, Inc. 3.600% 5/01/30		110,000		125,342
				1,009,846
Health Care – Products — 0.0%
Ortho-Clinical Diagnostics, Inc. / Ortho-Clinical Diagnostics SA 7.250% 2/01/28 (c)		80,000		83,200
Health Care – Services — 0.4%
Anthem, Inc. 2.375% 1/15/25		215,000		228,647
Centene Corp. 3.000% 10/15/30 (f)		60,000		61,212
HCA, Inc. 4.125% 6/15/29		215,000		243,176
5.375% 9/01/26		125,000		138,125
Health Care Service Corp. 3.200% 6/01/50 (c)		50,000		51,876
LifePoint Health, Inc. 4.375% 2/15/27 (c)		90,000		90,112
6.750% 4/15/25 (c)		55,000		57,887
Radiology Partners, Inc. 9.250% 2/01/28 (c)		95,000		98,800
Select Medical Corp. 6.250% 8/15/26 (c)		150,000		156,000
Tenet Healthcare Corp. 5.125% 11/01/27 (c)		155,000		159,216
West Street Merger Sub, Inc. 6.375% 9/01/25 (c)		145,000		147,870
				1,432,921
Home Builders — 0.0%
Mattamy Group Corp. 4.625% 3/01/30 (c)		120,000		121,512
Home Furnishing — 0.1%
Tempur Sealy International, Inc. 5.500% 6/15/26		238,000		247,032
Household Products & Wares — 0.0%
Kronos Acquisition Holdings, Inc. 9.000% 8/15/23 (c)		105,000		106,444
Insurance — 0.5%
Alliant Holdings Intermediate LLC / Alliant Holdings Co-Issuer 6.750% 10/15/27 (c)		75,000		78,684
Athene Global Funding 3.000% 7/01/22 (c)		400,000		413,072
Equitable Holdings, Inc. 3.900% 4/20/23		385,000		413,923

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
GTCR AP Finance, Inc. 8.000% 5/15/27 (c)	$	95,000	$	100,225
Prudential Financial, Inc. 3.905% 12/07/47		185,000		205,811
Willis North America, Inc. 4.500% 9/15/28		360,000		428,044
				1,639,759
Internet — 0.4%
Baidu, Inc. 3.425% 4/07/30		200,000		219,919
Expedia, Inc. Co. 3.800% 2/15/28		275,000		277,706
JD.com, Inc. 3.375% 1/14/30		400,000		433,364
Tencent Holdings Ltd. 2.390% 6/03/30 (c)		300,000		305,049
Uber Technologies, Inc. 7.500% 9/15/27 (c)		90,000		96,300
				1,332,338
Investment Companies — 0.1%
Temasek Financial I Ltd. Co. 1.000% 10/06/30 (c) (f)		350,000		344,843
Iron & Steel — 0.2%
CSN Islands XII Corp. 7.000% (c) (e)		200,000		175,000
POSCO 2.375% 1/17/23 (c)		200,000		204,934
2.750% 7/15/24 (c)		200,000		209,352
				589,286
Leisure Time — 0.1%
Carnival Corp. 11.500% 4/01/23 (c)		30,000		33,619
Viking Cruises Ltd. 13.000% 5/15/25 (c)		30,000		34,725
5.875% 9/15/27 (c)		160,000		124,400
				192,744
Lodging — 0.1%
Boyd Gaming Corp. 4.750% 12/01/27		150,000		147,188
Hilton Domestic Operating Co., Inc. 5.375% 5/01/25 (c)		20,000		20,886
5.750% 5/01/28 (c)		20,000		21,075
MGM Resorts International 6.750% 5/01/25		135,000		141,484
Wyndham Hotels & Resorts, Inc. 4.375% 8/15/28 (c)		75,000		72,750
				403,383

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Machinery – Construction & Mining — 0.0%
BWX Technologies, Inc. 4.125% 6/30/28 (c)	$	50,000	$	51,125
Media — 0.5%
CCO Holdings LLC/CCO Holdings Capital Corp. 4.750% 3/01/30 (c)		105,000		111,169
Cengage Learning, Inc. 9.500% 6/15/24 (c)		75,000		49,500
Charter Communications Operating LLC/Charter Communications Operating Capital 4.908% 7/23/25		325,000		375,772
Comcast Corp. 1.500% 2/15/31		330,000		326,910
3.400% 4/01/30		195,000		225,003
Diamond Sports Group LLC/Diamond Sports Finance Co. 5.375% 8/15/26 (c)		65,000		45,988
DISH DBS Corp. 5.875% 11/15/24		40,000		41,020
GCI LLC 4.750% 10/15/28 (c) (f)		90,000		91,126
Gray Escrow, Inc. 7.000% 5/15/27 (c)		145,000		157,200
iHeartCommunications, Inc. 8.375% 5/01/27		25,000		24,625
Nexstar Broadcasting, Inc. 5.625% 7/15/27 (c)		65,000		68,275
Radiate Holdco LLC / Radiate Finance, Inc. 4.500% 9/15/26 (c)		75,000		74,984
Scripps Escrow, Inc. 5.875% 7/15/27 (c)		80,000		77,200
Sirius XM Radio, Inc. 4.125% 7/01/30 (c)		140,000		142,625
				1,811,397
Mining — 0.4%
Anglo American Capital PLC 4.500% 3/15/28 (c)		385,000		440,421
Arconic Corp. 6.125% 2/15/28 (c)		110,000		112,956
Freeport-McMoRan, Inc. 4.625% 8/01/30		100,000		105,145
Novelis Corp. 4.750% 1/30/30 (c)		50,000		49,111
Vedanta Resources Finance II PLC 9.250% 4/23/26 (c)		200,000		149,100
Vedanta Resources Ltd. 6.125% 8/09/24 (c)		600,000		422,728
				1,279,461
Miscellaneous - Manufacturing — 0.1%
Gates Global LLC / Gates Corp. 6.250% 1/15/26 (c)		65,000		67,001

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
General Electric Co. 5.875% 1/14/38	$	225,000	$	263,105
				330,106
Multi-National — 0.1%
Banco Latinoamericano de Comercio Exterior SA 2.375% 9/14/25 (c)		200,000		202,800
Oil & Gas — 1.7%
Apache Corp. 4.375% 10/15/28		60,000		54,900
4.625% 11/15/25		40,000		38,125
Canacol Energy Ltd. 7.250% 5/03/25 (c)		200,000		205,502
Cenovus Energy, Inc. 5.375% 7/15/25		65,000		62,558
CNOOC Finance 2015 USA LLC 3.750% 5/02/23		370,000		394,690
CNOOC Finance Ltd. 3.000% 5/09/23		200,000		209,594
Cosan Overseas Ltd. 8.250% (c) (e)		500,000		510,000
Delek & Avner Tamar Bond Ltd. 5.082% 12/30/23 (c)		100,000		101,711
5.412% 12/30/25 (c)		100,000		101,691
Diamondback Energy, Inc. 2.875% 12/01/24		59,000		59,738
EOG Resources, Inc. 4.375% 4/15/30		70,000		82,480
EQT Corp. 7.875% STEP 2/01/25		60,000		66,507
Exxon Mobil Corp. 2.610% 10/15/30		165,000		178,350
4.227% 3/19/40		190,000		232,471
Geopark Ltd. 6.500% 9/21/24 (c)		200,000		189,500
Gran Tierra Energy International Holdings Ltd. 6.250% 2/15/25 (c)		400,000		136,004
Gulfport Energy Corp. 6.375% 5/15/25		105,000		64,050
Hilcorp Energy I LP / Hilcorp Finance Co. 6.250% 11/01/28 (c)		100,000		91,000
Indigo Natural Resources LLC 6.875% 2/15/26 (c)		50,000		48,664
Marathon Petroleum Corp. 5.125% 12/15/26		360,000		417,364
Medco Bell Pte Ltd. 6.375% 1/30/27 (c)		200,000		172,000
MEG Energy Corp. 7.125% 2/01/27 (c)		155,000		139,009
Occidental Petroleum Corp. 3.500% 8/15/29		65,000		49,803
6.625% 9/01/30		60,000		55,350
8.000% 7/15/25		50,000		50,311
Parkland Corp. 5.875% 7/15/27 (c)		135,000		141,919
Petrobras Global Finance BV 7.250% 3/17/44		100,000		113,950

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Petronas Capital Ltd. 3.500% 4/21/30 (c)	$	200,000	$	223,516
Pioneer Natural Resources Co. 1.900% 8/15/30		245,000		229,791
PTTEP Treasury Center Co. Ltd. 2.587% 6/10/27 (c)		200,000		206,464
QEP Resources, Inc. 5.625% 3/01/26		165,000		93,637
Reliance Industries Ltd. 5.400% 2/14/22 (c)		500,000		526,801
Sinopec Group Overseas Development 2018 Ltd. 2.700% 5/13/30 (c)		350,000		368,062
Sunoco LP / Sunoco Finance Corp. 5.500% 2/15/26		130,000		129,837
6.000% 4/15/27		90,000		92,475
Transocean Poseidon Ltd. 6.875% 2/01/27 (c)		150,000		120,222
Transocean, Inc. 11.500% 1/30/27 (c)		36,000		14,767
WPX Energy, Inc. 4.500% 1/15/30		65,000		63,904
5.875% 6/15/28		60,000		62,700
				6,099,417
Oil & Gas Services — 0.1%
Halliburton Co. 2.920% 3/01/30		125,000		123,172
Schlumberger Investment SA 2.650% 6/26/30		110,000		111,048
USA Compression Partners LP / USA Compression Finance Corp. 6.875% 9/01/27		185,000		183,450
				417,670
Packaging & Containers — 0.3%
CCL Industries, Inc. 3.050% 6/01/30 (c)		165,000		176,118
Flex Acquisition Co., Inc. 6.875% 1/15/25 (c)		90,000		89,945
Packaging Corp. of America 3.400% 12/15/27		215,000		240,149
Silgan Holdings, Inc. 4.125% 2/01/28		110,000		112,475
WRKCo, Inc. 3.750% 3/15/25		420,000		469,361
				1,088,048
Pharmaceuticals — 1.1%
AbbVie, Inc. 4.700% 5/14/45		260,000		320,138
Bausch Health Cos., Inc. 6.250% 2/15/29 (c)		170,000		174,855
Becton Dickinson and Co. 2.894% 6/06/22		610,000		631,600
Bristol-Myers Squibb Co. 4.350% 11/15/47		355,000		468,854

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Cigna Corp. 3 mo. USD LIBOR + .890% 1.165% FRN 7/15/23	$	205,000	$	207,118
4.900% 12/15/48		265,000		343,973
CVS Health Corp. 5.050% 3/25/48		180,000		229,754
Eli Lilly and Co. 2.250% 5/15/50		488,000		459,814
Merck & Co., Inc. 3.400% 3/07/29		385,000		448,553
Shire Acquisitions Investments Ireland DAC 2.875% 9/23/23		380,000		402,781
Upjohn, Inc. 1.650% 6/22/25 (c)		135,000		138,192
				3,825,632
Pipelines — 1.1%
Antero Midstream Partners LP / Antero Midstream Finance Corp. 5.750% 3/01/27 (c)		54,000		44,685
Cheniere Energy Partners LP 5.250% 10/01/25		30,000		30,690
5.625% 10/01/26		95,000		98,800
CNPC Global Capital Ltd. 1.125% 6/23/23 (c)		200,000		199,844
1.350% 6/23/25 (c)		200,000		200,230
Enable Midstream Partners LP 4.400% 3/15/27		170,000		162,924
Energy Transfer Operating LP 4.750% 1/15/26		470,000		500,528
EQM Midstream Partners LP 6.500% 7/01/27 (c)		120,000		127,202
Fermaca Enterprises S de RL de CV 6.375% 3/30/38 (c)		211,835		226,663
GNL Quintero SA 4.634% 7/31/29 (c)		250,000		267,637
Hess Midstream Operations LP 5.125% 6/15/28 (c)		110,000		109,793
Kinder Morgan Energy Partners LP 6.950% 1/15/38		300,000		392,598
NuStar Logistics LP 6.375% 10/01/30		90,000		93,375
ONEOK, Inc. 3.400% 9/01/29		140,000		137,172
Peru LNG SRL 5.375% 3/22/30 (c)		250,000		191,485
Rattler Midstream LP 5.625% 7/15/25 (c)		55,000		55,413
Sabine Pass Liquefaction LLC 5.000% 3/15/27		220,000		248,146
Sunoco Logistics Partners Operations LP 3.900% 7/15/26		750,000		770,136
Targa Resources Partners LP/Targa Resources Partners Finance Corp. 5.500% 3/01/30 (c)		100,000		100,105
Western Midstream Operating LP 4.100% STEP 2/01/25		75,000		71,438
				4,028,864

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Real Estate — 0.1%
Radiant Access Ltd. 4.600% (c) (e)	$	200,000	$	200,336
Realogy Group LLC / Realogy Co-Issuer Corp. 7.625% 6/15/25 (c)		35,000		36,663
				236,999
Real Estate Investment Trusts (REITS) — 0.9%
Alexandria Real Estate Equities, Inc. 4.000% 1/15/24		320,000		352,367
American Tower Corp. 3.600% 1/15/28		470,000		527,199
Boston Properties LP 3.400% 6/21/29		435,000		473,264
Crown Castle International Corp. 3.650% 9/01/27		460,000		514,729
3.700% 6/15/26		700,000		780,689
4.000% 3/01/27		225,000		255,661
Equinix, Inc. 1.800% 7/15/27		130,000		131,215
ESH Hospitality, Inc. 5.250% 5/01/25 (c)		70,000		70,700
Iron Mountain, Inc. 4.500% 2/15/31 (c)		60,000		60,564
National Retail Properties, Inc. 2.500% 4/15/30		115,000		114,049
Simon Property Group LP 2.450% 9/13/29		25,000		24,763
VICI Properties LP / VICI Note Co., Inc. 3.750% 2/15/27 (c)		15,000		14,749
4.125% 8/15/30 (c)		60,000		59,025
				3,378,974
Retail — 0.8%
Asbury Automotive Group, Inc. 4.500% 3/01/28 (c)		16,000		16,100
4.750% 3/01/30 (c)		16,000		16,120
Beacon Roofing Supply, Inc. 4.875% 11/01/25 (c)		160,000		156,800
Carvana Co. 8.875% 10/01/23 (c)		40,000		41,775
CK Hutchison International 20 Ltd. 2.500% 5/08/30 (c)		200,000		209,742
Costco Wholesale Corp. 1.750% 4/20/32		75,000		76,948
Dollar Tree, Inc. 4.000% 5/15/25		375,000		423,063
Golden Nugget, Inc. 6.750% 10/15/24 (c)		175,000		146,125
Group 1 Automotive, Inc. 4.000% 8/15/28 (c)		25,000		24,563
The Home Depot, Inc. 3.900% 6/15/47		220,000		271,622
IRB Holding Corp. 6.750% 2/15/26 (c)		120,000		120,000
7.000% 6/15/25 (c)		60,000		63,975

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
McDonald's Corp. 3.600% 7/01/30	$	205,000	$	239,049
4.450% 3/01/47		190,000		236,943
PetSmart, Inc. 5.875% 6/01/25 (c)		39,000		39,920
7.125% 3/15/23 (c)		75,000		75,656
Staples, Inc. 7.500% 4/15/26 (c)		115,000		106,278
Target Corp. 3.375% 4/15/29		405,000		470,893
Yum! Brands, Inc. 3.625% 3/15/31		135,000		135,000
				2,870,572
Semiconductors — 0.5%
Broadcom, Inc. 3.150% 11/15/25		345,000		373,679
Lam Research Corp. 2.875% 6/15/50		185,000		191,251
Marvell Technology Group Ltd. 4.200% 6/22/23		385,000		415,666
Micron Technology, Inc. 2.497% 4/24/23		190,000		197,306
NXP BV / NXP Funding LLC / NXP USA, Inc. 3.875% 6/18/26 (c)		190,000		212,856
Texas Instruments, Inc. 1.750% 5/04/30		105,000		108,305
Xilinx, Inc. 2.375% 6/01/30		220,000		230,954
				1,730,017
Software — 0.1%
Activision Blizzard, Inc. 1.350% 9/15/30		100,000		97,754
BY Crown Parent LLC / BY Bond Finance, Inc. 4.250% 1/31/26 (c)		50,000		50,906
Oracle Corp. 3.850% 4/01/60		265,000		312,837
				461,497
Telecommunications — 1.0%
AT&T, Inc. 3.500% 9/15/53 (c)		729,000		704,815
Avaya, Inc. 6.125% 9/15/28 (c)		80,000		81,568
CenturyLink, Inc. 4.000% 2/15/27 (c)		85,000		86,352
5.125% 12/15/26 (c)		105,000		107,876
Corning, Inc. 4.375% 11/15/57		180,000		217,947
Digicel Group 0.5 Ltd. 7.000% (c) (e)		76,581		9,190
8.000% 4/01/25 (c)		51,222		17,928
Front Range BidCo, Inc. 4.000% 3/01/27 (c)		90,000		88,580
6.125% 3/01/28 (c)		50,000		51,610

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Frontier Communications Corp. 8.000% 4/01/27 (c) (d)	$	105,000	$	104,637
Gogo Intermediate Holdings LLC / Gogo Finance Co., Inc. 9.875% 5/01/24 (c)		75,000		80,175
GTT Communications, Inc. 7.875% 12/31/24 (c)		50,000		25,750
Intelsat Jackson Holdings SA 8.500% 10/15/24 (c) (d)		85,000		54,825
Level 3 Financing, Inc. 4.250% 7/01/28 (c)		165,000		167,528
Ooredoo International Finance Ltd. 3.250% 2/21/23 (c)		400,000		417,840
T-Mobile USA, Inc. 1.500% 2/15/26 (c)		50,000		50,386
2.550% 2/15/31 (c)		500,000		517,305
3.500% 4/15/25 (c)		220,000		241,406
Telesat Canada/telesat L 6.500% 10/15/27 (c)		40,000		40,288
Verizon Communications, Inc. 4.400% 11/01/34		485,000		604,637
				3,670,643
Toys, Games & Hobbies — 0.1%
Hasbro, Inc. 3.500% 9/15/27		250,000		260,213
Transportation — 0.6%
Burlington Northern Santa Fe LLC 3.050% 2/15/51		215,000		236,765
CSX Corp. 3.800% 11/01/46		400,000		466,102
Empresa de Transporte de Pasajeros Metro SA 5.000% 1/25/47 (c)		750,000		935,625
FedEx Corp. 4.750% 11/15/45		195,000		241,268
Fideicomiso PA Pacifico Tres 8.250% 1/15/35 (c)		200,000		232,000
Mileage Plus Holdings LLC / Mileage Plus Intellectual Property Assets Ltd. 6.500% 6/20/27 (c)		100,000		104,125
				2,215,885
Trucking & Leasing — 0.1%
Penske Truck Leasing Co. LP/PTL Finance Corp. 4.200% 4/01/27 (c)		225,000		252,280
Water — 0.1%
Essential Utilities, Inc. 2.704% 4/15/30		220,000		235,398
TOTAL CORPORATE DEBT (Cost $85,991,624)				89,062,627
Municipal Obligations — 0.1%
Missouri Highway & Transportation Commission, Revenue Bonds 5.063% 5/01/24		135,000		152,292

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
State of California BAB, General Obligation 7.550% 4/01/39	$	190,000	$	332,428
				484,720
TOTAL MUNICIPAL OBLIGATIONS (Cost $428,519)				484,720
Non-U.S. Government Agency Obligations — 24.7%
Commercial Mortgage-Backed Securities — 6.8%
BANK Series 2020-BN28, Class AS, 2.140% 3/15/63		380,000		390,221
Series 2018-BN10, Class C, 4.163% VRN 2/15/61  (g)		310,000		308,281
Benchmark Mortgage Trust Series 2020-B19, Class AS, 2.148% 9/15/53		380,000		390,859
Series 2020-B18, Class C, 3.772% VRN 7/15/53  (g)		354,000		376,399
Series 2020-B18, Class AGNF, 4.139% 7/15/53  (c)		378,000		378,361
BFLD 2019-DPLO, Series 2019-DPLO, Class E, 1 mo. USD LIBOR + 2.240% 2.392% FRN 10/15/34  (c)		491,000		427,509
BX Trust, Series 2019-OC11, Class E, 4.076% VRN 12/09/41  (c) (g)		391,000		355,870
BXMT Ltd., Series 2020-FL2, Class A, 1 mo. USD LIBOR + .900% 1.051% FRN 2/16/37  (c)		312,000		306,554
CFCRE Commercial Mortgage Trust, Series 2016-C3, Class XA, 1.162% VRN 1/10/48  (g)		5,585,728		243,880
CHT Mortgage Trust Series 2017-CSMO, Class B, 1 mo. USD LIBOR + 1.400% 1.552% FRN 11/15/36  (c)		298,000		287,301
Series 2017-CSMO, Class E, 1 mo. USD LIBOR + 3.000% 3.152% FRN 11/15/36  (c)		273,000		255,261
Series 2017-CSMO, Class F, 1 mo. USD LIBOR + 3.741% 3.894% FRN 11/15/36  (c)		320,000		295,218
Citigroup Commercial Mortgage Trust Series 2016-GC36, Class D, 2.850% 2/10/49  (c)		201,000		124,465
Series 2019-GC41, Class B, 3.199% 8/10/56		377,000		404,212
Series 2017-C4, Class B, 4.096% VRN 10/12/50  (g)		340,000		363,451
Series 2015-GC31, Class C, 4.190% VRN 6/10/48  (g)		700,000		673,347
COMM Mortgage Trust Series 2012-CR4, Class D, 4.745% VRN 10/15/45  (c) (g)		738,000		132,840
Series 2015-LC23, Class C, 4.791% VRN 10/10/48  (g)		470,000		461,630
Commercial Mortgage Pass-Through Certificates, Series 2016-CR28, Class C, 4.794% VRN 2/10/49  (g)		465,000		464,059
CSAIL Commercial Mortgage Trust Series 2015-C1, Class XA, 0.976% VRN 4/15/50  (g)		8,278,785		242,973
Series 2020-C19, Class XA, 1.245% VRN 3/15/53  (g)		3,778,722		319,500
Series 2020-C19, Class C, 3.735% VRN 3/15/53  (g)		332,000		317,433
Series 2019-C16, Class B, 3.885% 6/15/52		334,000		360,271
Series 2016-C6, Class B, 3.924% VRN 1/15/49  (g)		298,000		323,975
Series 2015-C4, Class C, 4.709% VRN 11/15/48  (g)		427,000		452,455
Series 2018-C14, Class C, 5.054% VRN 11/15/51  (g)		405,000		429,091
Series 2016-C6, Class C, 5.088% VRN 1/15/49  (g)		378,000		393,993
DBGS Mortgage Trust, Series 2018-5BP, Class F, 1 mo. USD LIBOR + 2.450% 2.602% FRN 6/15/33  (c)		550,000		499,709
Fontainebleau Miami Beach Trust Series 2019-FBLU, Class E, 4.095% VRN 12/10/36  (c) (g)		262,000		245,980
Series 2019-FBLU, Class G, 4.095% VRN 12/10/36  (c) (g)		236,000		202,926

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
FREMF Mortgage Trust, Series 2019-K102, Class B, 3.652% VRN 12/25/51  (c) (g)	$	298,000	$	325,576
GS Mortgage Securities Corp. Trust Series 2018-RIVR, Class C, 1 mo. USD LIBOR + 1.250% 1.402% FRN 7/15/35  (c)		329,000		305,247
Series 2019-SOHO, Class E, 1 mo. USD LIBOR + 1.875% 2.027% FRN 6/15/36  (c)		318,000		298,278
GS Mortgage Securities Trust Series 2015-GS1, Class XA, 0.915% VRN 11/10/48  (g)		7,883,131		264,779
Series 2013-GC10, Class XA, 1.639% VRN 2/10/46  (g)		4,427,685		135,146
Series 2014-GC26, Class D, 4.662% VRN 11/10/47  (c) (g)		1,258,000		757,814
Series 2016-GS2, Class C, 4.677% VRN 5/10/49  (g)		340,000		357,994
GSCG Trust, Series 2019-600C, Class E, 4.118% VRN 9/06/34  (c) (g)		497,000		467,145
HPLY Trust, Series 2019-HIT, Class F, 1 mo. USD LIBOR + 3.150% 3.302% FRN 11/15/36  (c)		412,255		358,943
JP Morgan Chase Commercial Mortgage Securities Trust Series 2015-JP1, Class XA, 1.191% VRN 1/15/49  (g)		4,998,818		152,211
Series 2016-JP2, Class B, 3.460% 8/15/49		174,000		177,668
JPMBB Commercial Mortgage Securities Trust Series 2015-C30, Class XA, 0.653% VRN 7/15/48  (g)		9,396,509		197,899
Series 2015-C29, Class XA, 0.834% VRN 5/15/48  (g)		7,836,148		197,027
Series 2014-C25, Class XA, 0.998% VRN 11/15/47  (g)		4,163,829		117,586
Series 2015-C28, Class XA, 1.110% VRN 10/15/48  (g)		6,746,970		224,341
Series 2015-C27, Class D, 3.945% VRN 2/15/48  (c) (g)		704,000		546,907
Series 2015-C28, Class B, 3.986% 10/15/48		340,000		350,579
Series 2015-C29, Class C, 4.352% VRN 5/15/48  (g)		325,000		303,062
Series 2015-C33, Class C, 4.765% VRN 12/15/48  (g)		527,000		499,098
Series 2015-C32, Class C, 4.804% VRN 11/15/48  (g)		87,000		79,931
JPMDB Commercial Mortgage Securities Trust, Series 2020-COR7, Class C, 3.851% VRN 5/13/53  (g)		327,000		339,965
MF1 Ltd., Series 2020-FL3, Class AS, 1 mo. USD LIBOR + 2.850% 3.002% FRN 7/15/35  (c)		318,000		320,995
Morgan Stanley Bank of America Merrill Lynch Trust Series 2015-C27, Class D, 3.237% VRN 12/15/47  (c) (g)		504,000		322,490
Series 2015-C23, Class C, 4.289% VRN 7/15/50  (g)		650,000		602,560
Series 2015-C27, Class C, 4.675% VRN 12/15/47  (g)		351,000		323,694
Morgan Stanley Capital I Trust, Series 2015-UBS8, Class XA, 1.029% VRN 12/15/48  (g)		6,253,784		235,203
MSCG Trust, Series 2018-SELF, Class F, 1 mo. USD LIBOR + 3.050% 3.202% FRN 10/15/37  (c)		413,000		372,892
Natixis Commercial Mortgage Securities Trust, Series 2018-FL1, Class C, 1 mo. USD LIBOR + 2.200% 2.362% FRN 6/15/35  (c)		368,000		334,686
One Market Plaza Trust, Series 2017-1MKT, Class E 4.142% 2/10/32 (c)		381,000		387,688
SG Commercial Mortgage Securities Trust, Series 2016-C5, Class XA, 2.125% VRN 10/10/48  (g)		3,822,488		257,441
UBS Commercial Mortgage Trust Series 2017-C2, Class B, 3.993% VRN 8/15/50  (g)		332,000		354,020
Series 2017-C1, Class B, 4.036% 6/15/50		328,000		339,192
Series 2017-C6, Class B, 4.154% VRN 12/15/50  (g)		340,000		356,757
Wells Fargo Commercial Mortgage Trust Series 2015-NXS2, Class XA, 0.808% VRN 7/15/58  (g)		10,216,900		271,630
Series 2015-P2, Class XA, 1.076% VRN 12/15/48  (g)		5,089,318		175,058
Series 2019-C53, Class XA, 1.154% VRN 10/15/52  (g)		4,354,169		305,752
Series 2020-C57, Class XA, 2.238% VRN 8/15/53  (g)		2,238,651		357,379
Series 2016-C35, Class B, 3.438% 7/15/48		328,000		335,171

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2014-LC16, Class D, 3.938% 8/15/50  (c)	$	169,000	$	89,530
Series 2019-C50, Class B, 4.192% 5/15/52		409,000		430,352
Series 2019-C50, Class C, 4.345% 5/15/52		409,000		375,588
Series 2016-C37, Class C, 4.639% VRN 12/15/49  (g)		376,000		382,335
Series 2015-NXS4, Class C, 4.820% VRN 12/15/48  (g)		421,000		433,866
				24,249,499
Home Equity Asset-Backed Securities — 1.5%
GSAA Home Equity Trust, Series 2007-10, Class A2A 6.500% 11/25/37		3,847,264		2,666,370
Morgan Stanley ABS Capital I, Inc. Trust, Series 2006-HE6, Class A2C, 1 mo. USD LIBOR + .150% 0.298% FRN 9/25/36		5,876,761		2,683,196
				5,349,566
Other Asset-Backed Securities — 9.1%
AASET US Ltd., Series 2018-1A, Class A 3.844% 1/16/38 (c)		513,749		474,600
ALM R Ltd., Series 2013-7RA, Class CR, 3 mo. USD LIBOR + 4.040% 4.315% FRN 10/15/28  (c)		1,000,000		1,000,017
ANCHORAGE CAPITAL CLO 13 LLC, Series 2019-13A, Class B, 3 mo. USD LIBOR + 2.000% 2.275% FRN 4/15/32  (c)		500,000		499,082
Blackbird Capital Aircraft Lease Securitization Ltd., Series 2016-1A, Class B, 5.682% STEP 12/16/41  (c)		770,833		503,145
BlueMountain CLO Ltd. Series 2015-3A, Class CR, 3 mo. USD LIBOR + 2.600% 2.872% FRN 4/20/31  (c)		1,000,000		863,524
Series 2013-1A, Class CR, 3 mo. USD LIBOR + 4.150% 4.422% FRN 1/20/29  (c)		1,000,000		911,785
CLI Funding LLC Series 2014-2A, Class A, 3.380% 10/18/29  (c)		263,330		263,356
Series 2019-1A, Class A, 3.710% 5/18/44  (c)		433,790		441,591
Dryden 40 Senior Loan Fund, Series 2015-40A, Class DR, 3 mo. USD LIBOR + 3.100% 3.380% FRN 8/15/31  (c)		500,000		478,479
Gilbert Park CLO Ltd. Series 2017-1A, Class D, 3 mo. USD LIBOR + 2.950% 3.225% FRN 10/15/30  (c)		500,000		482,499
Series 2017-1A, Class E, 3 mo. USD LIBOR + 6.400% 6.675% FRN 10/15/30  (c)		1,000,000		920,216
Global SC Finance SRL, Series 2014-1A, Class A1 3.190% 7/17/29 (c)		272,167		270,741
Grippen Park CLO Ltd., Series 2017-1A, Class D, 3 mo. USD LIBOR + 3.300% 3.572% FRN 1/20/30  (c)		1,000,000		973,017
Helios Issuer LLC Series 2020-AA, Class A, 2.980% 6/20/47  (c)		473,814		491,044
Series 2017-1A, Class A, 4.940% 9/20/49  (c)		211,236		224,863
Hero Funding Trust, Series 2016-4A, Class A2 4.290% 9/20/47 (c)		205,670		216,093
Highbridge Loan Management Ltd., Series 13A-18, Class D, 3 mo. USD LIBOR + 3.000% 3.275% FRN 10/15/30  (c)		500,000		456,435
Invitation Homes Trust Series 2018-SFR1, Class C, 1 mo. USD LIBOR + 1.250% 1.401% FRN 3/17/37  (c)		1,145,000		1,145,681

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2018-SFR1, Class D, 1 mo. USD LIBOR + 1.450% 1.601% FRN 3/17/37  (c)	$	750,000	$	749,108
JOL Air Ltd., Series 2019-1, Class A 3.967% 4/15/44 (c)		447,332		424,175
Long Beach Mortgage Loan Trust, Series 2006-7, Class 1A, 1 mo. USD LIBOR + .155% 0.303% FRN 8/25/36		3,195,147		2,088,384
MACH 1 Cayman Ltd., Series 2019-1, Class A 3.474% 10/15/39 (c)		464,193		422,214
Madison Park Funding Ltd., Series 2014-14A, Class DRR, 3 mo. USD LIBOR + 2.950% 3.208% FRN 10/22/30  (c)		500,000		462,498
Merrill Lynch Mortgage Investors Trust, Series 2006-OPT1, Class A2C, 1 mo. USD LIBOR + .150% 0.298% FRN 8/25/37		1,940,758		1,861,927
Mosaic Solar Loans LLC Series 2020-1A, Class A, 2.100% 4/20/46  (c)		475,127		480,467
Series 2020-2A, Class B, 2.210% 8/20/46  (f)		500,000		492,826
Series 2017-1A, Class A, 4.450% 6/20/42  (c)		395,592		424,633
Newark BSL CLO 2 Ltd., Series 2017-1A, Class C, 3 mo. USD LIBOR + 3.650% 3.895% FRN 7/25/30  (c)		500,000		493,041
Oak Hill Credit Partners Ltd., Series 2018-1A, Class D, 3 mo. USD LIBOR + 3.050% 3.322% FRN 10/20/30  (c)		500,000		471,285
Octagon Investment Partners Ltd., Series 2017-1A, Class C, 3 mo. USD LIBOR + 3.500% 3.772% FRN 3/17/30  (c)		1,000,000		947,872
Primose Funding LLC, Series 2019-1A, Class A2 4.475% 7/30/49 (c)		992,500		1,027,079
Sprite Ltd., Series 2017-1, Class A 4.250% 12/15/37 (c)		322,873		293,773
START Ireland, Series 2019-1, Class A 4.089% 3/15/44 (c)		329,827		307,452
Sunrun Atlas Issuer 2019-2 LLC, Series 2019-2, Class A 3.610% 2/01/55 (c)		737,161		772,420
Symphony CLO Ltd., Series 2015-16A, Class DR, 3 mo. USD LIBOR + 3.050% 3.325% FRN 10/15/31  (c)		500,000		470,183
Taco Bell Funding LLC, Series 2018-1A, Class A2I 4.318% 11/25/48 (c)		982,500		1,003,377
Textainer Marine Containers VII Ltd., Series 2019-1A, Class A 3.960% 4/20/44 (c)		443,333		443,333
Textainer Marine Containers VIII Ltd., Series 2020-2A, Class A 2.100% 9/20/45 (c)		500,000		499,917
Thacher Park CLO Ltd., Series 2014-1A, Class D1R, 3 mo. USD LIBOR + 3.400% 3.672% FRN 10/20/26  (c)		1,000,000		995,365
Thunderbolt Aircraft Lease Ltd. Series 2018-A, Class A, 4.147% STEP 9/15/38  (c)		442,900		416,372
Series 2017-A, Class A, 4.212% STEP 5/17/32  (c)		864,559		814,627
TPG Real Estate Finance Issuer Ltd., Series 2018-FL2, Class AS, 1 mo. USD LIBOR + 1.450% 1.601% FRN 11/15/37  (c)		314,000		309,122
Trip Rail Master Funding LLC, Series 2017-1A, Class A1 2.709% 8/15/47 (c)		138,172		138,295
Vantage Data Centers Issuer LLC, Series 2018-1A, Class A2 4.072% 2/16/43 (c)		730,625		755,765

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Vantage Data Centers LLC, Series 2020-2A, Class A2 1.992% 9/15/45 (c) (f)	$	375,000	$	375,172
VB-S1 Issuer LLC, Series 2020-1A, Class C2 3.031% 6/15/50 (c)		500,000		520,490
Vericrest Opportunity Loan Trust, Series 2019-NPL2, Class A1, 3.967% STEP 2/25/49  (c)		848,125		854,438
VOLT LXXXVII LLC, Series 2020-NPL3, Class A1A, 2.981% STEP 2/25/50  (c)		562,728		562,728
Westcott Park CLO Ltd., Series 2016-1A, Class DR, 3 mo. USD LIBOR + 3.250% 3.522% FRN 7/20/28  (c)		500,000		488,333
Willis Engine Structured Trust IV, Series 2018-A, Class A, 4.750% STEP 9/15/43  (c)		781,267		658,953
Wind River CLO Ltd., Series 2017-1A, Class D, 3 mo. USD LIBOR + 3.750% 4.022% FRN 4/18/29  (c)		1,000,000		962,726
				32,604,518
Student Loans Asset-Backed Securities — 0.3%
College Avenue Student Loans LLC, Series 2018-A, Class A1, 1 mo. USD LIBOR + 1.200% 1.348% FRN 12/26/47  (c)		362,972		359,355
SoFi Professional Loan Program LLC Series 2017-D, Class BFX, 3.610% 9/25/40  (c)		350,000		347,436
Series 2018-B, Class BFX, 3.830% 8/25/47  (c)		500,000		480,640
				1,187,431
Whole Loan Collateral Collateralized Mortgage Obligations — 6.6%
CIM Trust, Series 2017-6, Class A1, 3.015% VRN 6/25/57  (c) (g)		1,759,989		1,748,777
Citigroup Mortgage Loan Trust, Series 2007-AR5, Class 1A2A, 3.969% VRN 4/25/37  (g)		1,227,391		1,142,688
CitiMortgage Alternative Loan Trust, Series 2006-A1, Class 1A5 5.500% 4/25/36		2,030,827		2,043,098
Countrywide Alternative Loan Trust Series 2006-13T1, Class A11, 6.000% 5/25/36		1,983,305		1,429,797
Series 2006-36T2, Class 2A1, 6.250% 12/25/36		3,447,817		2,330,562
Countrywide Home Loans Mortgage Pass-Through Trust Series 2007-HYB2, Class 3A1, 3.360% VRN 2/25/47  (g)		1,230,360		1,096,841
Series 2007-14, Class A6, 6.000% 9/25/37		1,535,313		1,236,310
HarborView Mortgage Loan Trust, Series 2006-11, Class A1A, 1 mo. USD LIBOR + .170% 0.326% FRN 12/19/36		977,857		884,717
IndyMac INDX Mortgage Loan Trust, Series 2007-AR5, Class 2A1, 3.398% VRN 5/25/37  (g)		2,434,559		2,175,024
Lehman XS Trust, Series 2007-12N, Class 1A3A, 1 mo. LIBOR + .200% 0.348% FRN 7/25/47		2,761,335		2,548,259
Morgan Stanley Mortgage Loan Trust, Series 2005-3AR, Class 2A1, 3.208% VRN 7/25/35  (g)		442,742		415,384
Nomura Asset Acceptance Corp. Alternative Loan Trust, Series 2006-AR1, Class 2A1, 3.526% VRN 2/25/36  (g)		2,212,291		1,914,494
RBSSP Resecuritization Trust, Series 2009-5, Class 2A3, 6.500% VRN 10/26/37  (c) (g)		956,696		706,568
RFMSI Trust, Series 2007-S4, Class A5, 1 mo. USD LIBOR + .600% 6.000% FRN 4/25/37		282,390		269,391
Structured Adjustable Rate Mortgage Loan Trust, Series 2008-1, Class A2, 3.200% VRN 10/25/37  (g)		958,988		854,273

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Voyager OPTONE Delaware Trust, Series 2009-1, Class SAC3, 1 mo. LIBOR +0.000% 11.628% VRN 2/25/38  (c)	$	2,222,178	$	1,709,832
Washington Mutual Mortgage Pass-Through Certificates Trust, Series 2006-4, Class 3A5, 6.350% STEP 5/25/36		1,008,439		954,933
				23,460,948
Whole Loan Collateral Planned Amortization Classes — 0.4%
Countrywide Alternative Loan Trust, Series 2006-19CB, Class A15 6.000% 8/25/36		1,808,264		1,496,102
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $93,949,071)				88,348,064
Sovereign Debt Obligations — 1.1%
Abu Dhabi Government International Bond 0.750% 9/02/23 (c)		200,000		199,750
3.125% 4/16/30 (c)		200,000		223,576
Indonesia Government International Bond 3.375% 4/15/23 (c)		200,000		210,908
Korea Electric Power Corp. 1.125% 6/15/25 (c)		200,000		201,028
Mexico Government International Bond 3.750% 1/11/28		535,000		575,933
4.150% 3/28/27		343,000		381,588
Panama Government International Bond 3.750% 3/16/25		200,000		218,302
4.000% 9/22/24		200,000		218,702
Perusahaan Penerbit SBSN Indonesia 4.150% 3/29/27 (c)		200,000		224,802
Peruvian Government International Bond 2.392% 1/23/26		100,000		104,901
2.783% 1/23/31		300,000		324,150
Qatar Government International Bond 3.375% 3/14/24 (c)		400,000		430,632
3.875% 4/23/23 (c)		200,000		214,600
Saudi Government International Bond 2.375% 10/26/21 (c)		200,000		203,251
2.900% 10/22/25 (c)		250,000		267,001
				3,999,124
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $3,815,566)				3,999,124
U.S. Government Agency Obligations and Instrumentalities — 18.7%
Collateralized Mortgage Obligations — 10.4%
Federal Home Loan Mortgage Corp 3.500% 7/15/49		3,238,429		3,454,575
Federal Home Loan Mortgage Corp. REMICS Series 4934, Class P, 2.500% 11/15/40		2,360,016		2,505,060
Series 4093, Class PA, 3.000% 8/15/42		3,089,572		3,207,139
Series 4481, Class B, 3.000% 12/15/42		4,071,049		4,196,226
Series 4483, Class CA, 3.000% 6/15/44		4,321,284		4,547,708
Series 4750, Class PA, 3.000% 7/15/46		1,572,961		1,621,083
Federal Home Loan Mortgage Corp. STRIPS Series 355, Class 300, 3.000% 8/15/47		2,555,432		2,750,500

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Series 358, Class 300, 3.000% 10/15/47	$	2,256,279	$	2,429,644
Federal National Mortgage Association REMICS Series 2018-21, Class PO, 0.010% 4/25/48		2,299,558		2,153,496
Series 2015-9, Class HA, 3.000% 1/25/45		607,248		650,992
Government National Mortgage Association Series 2015-74, Class LZ, 3.500% 5/20/45		3,451,120		3,704,497
Series 2015-92, Class CZ, 3.500% 6/20/45		5,491,254		5,972,567
				37,193,487
Pass-Through Securities — 7.5%
Federal Home Loan Mortgage Corp. Pool #RE6066 2.000% 10/01/50  (f)		7,000,000		7,170,910
Pool #BL5484 2.260% 1/01/30		3,000,000		3,329,314
Pool #G08520 2.500% 1/01/43		987,180		1,044,090
Pool #SB0048 3.000% 8/01/34		2,142,192		2,275,412
Pool #G08632 3.500% 3/01/45		1,712,866		1,843,572
Federal National Mortgage Association Pool #MA4158 2.000% 10/01/50		4,000,000		4,137,663
Pool #BP5817 2.500% 5/01/50		2,933,491		3,076,776
Pool #MA2248 3.000% 4/01/45		1,390,897		1,440,462
Pool #AS7661 3.000% 8/01/46		925,153		958,121
Pool #AX2501 4.000% 10/01/44		1,456,098		1,597,841
				26,874,161
Whole Loans — 0.8%
Federal Home Loan Mortgage Corp. SCRT Series 2018-2, Class HV  3.000% VRN 11/25/57(g)		2,782,757		3,015,189
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $63,198,952)				67,082,837
U.S. Treasury Obligations — 25.8%
U.S. Treasury Bonds & Notes — 25.8%
U.S. Treasury Bond 1.125% 8/15/40		3,150,000		3,097,308
1.375% 8/15/50		2,450,000		2,404,343
2.750% 11/15/42		300,000		384,761
2.750% 11/15/47		2,720,000		3,541,755
3.125% 2/15/43		2,590,000		3,514,267
3.625% 8/15/43		2,430,000		3,548,340
U.S. Treasury Note 0.125% 9/30/22		4,780,000		4,779,998
0.125% 9/15/23		7,150,000		7,143,821
0.250% 9/30/25		7,960,000		7,951,826
0.375% 9/30/27		11,830,000		11,756,165
0.625% 8/15/30		4,370,000		4,348,315
1.625% 10/31/26		3,980,000		4,278,562
1.625% 8/15/29		3,600,000		3,920,759
1.750% 11/30/21		5,460,000		5,562,254
2.125% 9/30/24		4,070,000		4,379,982
2.250% 10/31/24		4,325,000		4,681,753
2.250% 3/31/26		3,340,000		3,690,741
2.250% 8/15/27		725,000		813,453
2.250% 11/15/27		4,060,000		4,566,259
2.625% 1/31/26		660,000		740,928
2.750% 2/28/25		2,480,000		2,753,502

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
3.000% 9/30/25	$	3,980,000	$	4,517,286
				92,376,378
TOTAL U.S. TREASURY OBLIGATIONS (Cost $88,599,664)				92,376,378
TOTAL BONDS & NOTES (Cost $348,847,793)				354,013,833
TOTAL LONG-TERM INVESTMENTS (Cost $348,847,793)				354,013,833
Short-Term Investments — 3.2%
Repurchase Agreement — 2.7%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/20, 0.000%, due 10/01/20 (h)		9,556,271		9,556,271
U.S. Treasury Bill — 0.5%
U.S. Treasury Bill 0.000% 11/05/20		90,000		89,992
0.000% 11/27/20		1,680,000		1,679,747
				1,769,739
TOTAL SHORT-TERM INVESTMENTS (Cost $11,325,720)				11,326,010
TOTAL INVESTMENTS — 102.0% (Cost $360,173,513) (i)				365,339,843
Less Unfunded Loan Commitments (0.00)%				(23,306	)
NET INVESTMENTS — 102.0% (Cost $360,150,207)				365,316,537
Other Assets/(Liabilities) — (2.0)%				(7,289,020	)
NET ASSETS — 100.0%			$	358,027,517

Abbreviation Legend

BAB	Build America Bonds
CLO	Collateralized Loan Obligation
DIP	Debtor In Possession
FRN	Floating Rate Note
PO	Principal Only
REMICS	Real Estate Mortgage Investment Conduits
SCRT	Seasoned Credit Risk Transfer
STEP	Step Up Bond
STRIPS	Separate Trading of Registered Interest and Principal of Securities
VRN	Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	All or a portion of the security represents unsettled loan commitments at September 30, 2020 where the rate will be determined at time of settlement.
(b)	Unfunded or partially unfunded loan commitments.
(c)	Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At September 30, 2020, the aggregate market value of these securities amounted to $85,241,033 or 23.81% of net assets.
(d)	Security is currently in default due to bankruptcy or failure to make payment of principal or interest of the issuer. Income is not being accrued. At September 30, 2020, these securities amounted to a value of $344,462 or 0.10% of net assets.
(e)	Security is perpetual and has no stated maturity date.
(f)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.
(g)	Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions.  These securities do not indicate a reference rate and spread in their description above. The rates shown are the current interest rates at September 30, 2020.
(h)	Maturity value of $9,556,271. Collateralized by U.S. Government Agency obligations with a rate of 2.375%, maturity date of 3/15/22, and an aggregate market value, including accrued interest, of $9,747,491.
(i)	See Note 3 for aggregate cost for federal tax purposes.

Currency Legend

USD U.S. Dollar

MML Equity Fund —  Portfolio of Investments
September 30, 2020 (Unaudited)
	Number of Shares		Value
Equities — 98.0%
Common Stock — 97.9%
Basic Materials — 3.1%
Chemicals — 2.2%
Air Liquide SA		1,270	$	201,528
Albemarle Corp.		6,300		562,464
Celanese Corp.		7,100		762,895
DuPont de Nemours, Inc.		18,300		1,015,284
Eastman Chemical Co.		8,000		624,960
FMC Corp.		7,700		815,507
Huntsman Corp.		11,500		255,415
Linde PLC		22,933		5,461,035
LyondellBasell Industries NV Class A		23,000		1,621,270
The Mosaic Co.		12,100		221,067
PPG Industries, Inc.		27,766		3,389,673
				14,931,098
Forest Products & Paper — 0.5%
International Paper Co.		86,566		3,509,386
Iron & Steel — 0.2%
Nucor Corp.		18,000		807,480
Reliance Steel & Aluminum Co.		4,000		408,160
Steel Dynamics, Inc.		12,700		363,601
				1,579,241
Mining — 0.2%
Freeport-McMoRan, Inc.		82,700		1,293,428
				21,313,153
Communications — 10.1%
Advertising — 0.2%
The Interpublic Group of Cos., Inc.		19,300		321,731
Omnicom Group, Inc.		12,900		638,550
				960,281
Internet — 2.2%
Alphabet, Inc. Class C (a)		6,511		9,568,566
Booking Holdings, Inc. (a)		12		20,528
CDW Corp.		4,600		549,838
E*TRADE Financial Corp.		48,118		2,408,306
eBay, Inc.		48,000		2,500,800
Facebook, Inc. Class A (a)		200		52,380
				15,100,418

MML Equity Fund —  Portfolio of Investments (Continued)
	Number of Shares		Value
Media — 2.2%
Comcast Corp. Class A		267,000	$	12,351,420
Discovery, Inc. Class A (a) (b)		9,100		198,107
Fox Corp. Class A		19,000		528,770
The Walt Disney Co.		19,079		2,367,322
				15,445,619
Telecommunications — 5.5%
AT&T, Inc.		406,600		11,592,166
Ciena Corp. (a)		5,000		198,450
Cisco Systems, Inc.		240,800		9,485,112
Corning, Inc.		42,100		1,364,461
Juniper Networks, Inc.		19,800		425,700
Motorola Solutions, Inc.		4,824		756,451
Verizon Communications, Inc.		244,200		14,527,458
				38,349,798
				69,856,116
Consumer, Cyclical — 5.9%
Apparel — 0.1%
Deckers Outdoor Corp. (a)		600		132,006
Hanesbrands, Inc.		11,200		176,400
Skechers U.S.A., Inc. Class A (a)		7,900		238,738
				547,144
Auto Manufacturers — 1.2%
Cummins, Inc.		12,800		2,702,848
Ford Motor Co.		118,600		789,876
General Motors Co.		109,047		3,226,701
PACCAR, Inc.		20,500		1,748,240
				8,467,665
Auto Parts & Equipment — 0.3%
BorgWarner, Inc.		12,200		472,628
Gentex Corp.		14,100		363,075
Lear Corp.		3,400		370,770
Magna International, Inc.		19,080		872,910
				2,079,383
Distribution & Wholesale — 0.3%
HD Supply Holdings, Inc. (a)		8,800		362,912
LKQ Corp. (a)		18,200		504,686
W.W. Grainger, Inc.		3,300		1,177,341
				2,044,939
Home Builders — 0.8%
D.R. Horton, Inc.		21,900		1,656,297
Lennar Corp. Class A		38,000		3,103,840
PulteGroup, Inc.		15,400		712,866
Toll Brothers, Inc.		4,000		194,640
				5,667,643

MML Equity Fund —  Portfolio of Investments (Continued)
	Number of Shares		Value
Home Furnishing — 0.1%
Whirlpool Corp.		3,900	$	717,171
Housewares — 0.0%
Newell Brands, Inc.		13,600		233,376
Leisure Time — 0.0%
Brunswick Corp.		4,300		253,313
Lodging — 0.7%
Hilton Worldwide Holdings, Inc.		23,300		1,987,956
Marriott International, Inc. Class A		16,938		1,568,120
MGM Resorts International		42,455		923,396
				4,479,472
Retail — 2.4%
Advance Auto Parts, Inc.		3,900		598,650
AutoZone, Inc. (a)		1,500		1,766,460
Best Buy Co., Inc.		15,400		1,713,866
Dollar Tree, Inc. (a)		7,600		694,184
Genuine Parts Co.		8,600		818,462
The Home Depot, Inc.		2,600		722,046
McDonald's Corp.		16,826		3,693,139
O'Reilly Automotive, Inc. (a)		1,989		917,088
Ross Stores, Inc.		12,557		1,171,819
The TJX Cos., Inc.		19,400		1,079,610
Williams-Sonoma, Inc.		4,500		406,980
Yum! Brands, Inc.		29,482		2,691,707
				16,274,011
				40,764,117
Consumer, Non-cyclical — 21.4%
Agriculture — 1.5%
Archer-Daniels-Midland Co.		32,900		1,529,521
Bunge Ltd.		4,500		205,650
Darling Ingredients, Inc. (a)		5,200		187,356
Philip Morris International, Inc.		115,722		8,677,993
				10,600,520
Beverages — 0.2%
The Coca-Cola Co.		18,300		903,471
PepsiCo, Inc.		900		124,740
				1,028,211
Biotechnology — 2.9%
Alexion Pharmaceuticals, Inc. (a)		12,600		1,441,818
Amgen, Inc.		35,200		8,946,432
Bio-Rad Laboratories, Inc. Class A (a)		1,500		773,190
Biogen, Inc. (a)		11,400		3,233,952
Corteva, Inc.		24,100		694,321
Gilead Sciences, Inc.		75,000		4,739,250
				19,828,963

MML Equity Fund —  Portfolio of Investments (Continued)
	Number of Shares		Value
Commercial Services — 0.5%
AMERCO		1,300	$	462,774
ManpowerGroup, Inc.		3,600		263,988
Quanta Services, Inc.		8,500		449,310
Robert Half International, Inc.		6,500		344,110
United Rentals, Inc. (a)		12,700		2,216,150
				3,736,332
Foods — 1.4%
Conagra Brands, Inc.		28,800		1,028,448
Ingredion, Inc.		4,100		310,288
The J.M. Smucker Co.		6,500		750,880
Kellogg Co.		20,300		1,311,177
The Kraft Heinz Co.		69,500		2,081,525
The Kroger Co.		24,900		844,359
Tyson Foods, Inc. Class A		61,737		3,672,117
				9,998,794
Health Care – Products — 3.3%
Boston Scientific Corp. (a)		67,600		2,582,996
Danaher Corp.		44,018		9,478,396
Henry Schein, Inc. (a)		8,700		511,386
Medtronic PLC		17,214		1,788,879
Stryker Corp.		10,093		2,103,078
Thermo Fisher Scientific, Inc.		12,606		5,565,801
Zimmer Biomet Holdings, Inc.		5,564		757,483
				22,788,019
Health Care – Services — 4.1%
Anthem, Inc.		22,347		6,002,181
DaVita, Inc. (a)		8,200		702,330
HCA Healthcare, Inc.		47,004		5,860,459
Humana, Inc.		4,200		1,738,338
Laboratory Corp. of America Holdings (a)		5,700		1,073,139
Molina Healthcare, Inc. (a)		3,300		604,032
Quest Diagnostics, Inc.		8,000		915,920
UnitedHealth Group, Inc.		36,112		11,258,638
Universal Health Services, Inc. Class B		1,700		181,934
				28,336,971
Household Products & Wares — 0.3%
Avery Dennison Corp.		4,600		588,064
Kimberly-Clark Corp.		11,000		1,624,260
				2,212,324
Pharmaceuticals — 7.2%
AbbVie, Inc.		33,376		2,923,404
AmerisourceBergen Corp.		12,200		1,182,424
Bausch Health Cos., Inc. (a)		52,231		811,670
Becton Dickinson and Co.		3,827		890,466
Cardinal Health, Inc.		17,300		812,235
Cigna Corp.		20,400		3,455,964
CVS Health Corp.		897		52,385
Elanco Animal Health, Inc. (a)		31,942		892,140

MML Equity Fund —  Portfolio of Investments (Continued)
	Number of Shares		Value
Jazz Pharmaceuticals PLC (a)		3,400	$	484,806
Johnson & Johnson		84,416		12,567,854
McKesson Corp.		10,800		1,608,444
Merck & Co., Inc.		150,600		12,492,270
Perrigo Co. PLC		8,000		367,280
Pfizer, Inc.		306,679		11,255,119
				49,796,461
				148,326,595
Energy — 2.3%
Oil & Gas — 1.1%
Chevron Corp.		110,400		7,948,800
EOG Resources, Inc.		5,986		215,137
Exxon Mobil Corp.		3,600		123,588
				8,287,525
Oil & Gas Services — 0.1%
Halliburton Co.		31,844		383,720
Pipelines — 1.1%
Cheniere Energy, Inc. (a)		8,100		374,787
Enbridge, Inc.		63,896		1,865,763
TC Energy Corp.		42,318		1,778,202
The Williams Cos., Inc.		187,204		3,678,559
				7,697,311
				16,368,556
Financial — 20.6%
Banks — 9.7%
Bank of America Corp.		753,919		18,161,909
The Bank of New York Mellon Corp.		54,400		1,868,096
Commerce Bancshares, Inc.		6,645		374,047
Cullen/Frost Bankers, Inc. (b)		3,400		217,430
East West Bancorp, Inc.		7,800		255,372
Fifth Third Bancorp		39,300		837,876
The Goldman Sachs Group, Inc.		25,035		5,031,284
JP Morgan Chase & Co.		211,200		20,332,224
Morgan Stanley		244,567		11,824,815
Northern Trust Corp.		12,400		966,828
The PNC Financial Services Group, Inc.		33,875		3,723,201
Signature Bank		3,100		257,269
State Street Corp.		21,400		1,269,662
SVB Financial Group (a)		3,200		769,984
Wells Fargo & Co.		62,200		1,462,322
				67,352,319
Diversified Financial Services — 3.6%
Ally Financial, Inc.		12,000		300,840
American Express Co.		48,500		4,862,125
Ameriprise Financial, Inc.		8,300		1,279,113
BlackRock, Inc.		9,300		5,241,015
Capital One Financial Corp.		71,771		5,157,464
The Charles Schwab Corp.		63,403		2,297,091

MML Equity Fund —  Portfolio of Investments (Continued)
	Number of Shares		Value
CME Group, Inc.		4,642	$	776,653
Credit Acceptance Corp. (a) (b)		1,200		406,368
Eaton Vance Corp.		6,600		251,790
Intercontinental Exchange, Inc.		4,000		400,200
LPL Financial Holdings, Inc.		4,600		352,682
Raymond James Financial, Inc.		8,200		596,632
SEI Investments Co.		8,500		431,120
T. Rowe Price Group, Inc.		13,800		1,769,436
The Western Union Co.		23,500		503,605
				24,626,134
Insurance — 5.3%
Aflac, Inc.		43,500		1,581,225
The Allstate Corp.		19,300		1,816,902
American International Group, Inc.		152,930		4,210,163
Arch Capital Group Ltd. (a)		23,900		699,075
Assurant, Inc.		3,700		448,847
Chubb Ltd.		31,670		3,677,520
Equitable Holdings, Inc.		169,378		3,089,455
Everest Re Group Ltd.		2,300		454,342
First American Financial Corp.		6,200		315,642
Globe Life, Inc.		13,800		1,102,620
The Hartford Financial Services Group, Inc.		30,796		1,135,140
Kemper Corp.		1,500		100,245
Loews Corp.		17,600		611,600
Markel Corp. (a)		890		866,593
Marsh & McLennan Cos., Inc.		18,591		2,132,388
MetLife, Inc.		118,052		4,387,993
Old Republic International Corp.		12,700		187,198
Primerica, Inc.		2,300		260,222
Principal Financial Group, Inc.		19,027		766,217
The Progressive Corp.		33,300		3,152,511
Prudential Financial, Inc.		23,700		1,505,424
The Travelers Cos., Inc.		31,300		3,386,347
Voya Financial, Inc.		9,000		431,370
W.R. Berkley Corp.		9,400		574,810
				36,893,849
Real Estate — 0.1%
CBRE Group, Inc. Class A (a)		20,000		939,400
Real Estate Investment Trusts (REITS) — 1.9%
Prologis, Inc.		83,687		8,420,586
Sun Communities, Inc.		11,215		1,576,941
Welltower, Inc.		18,234		1,004,511
Weyerhaeuser Co.		69,556		1,983,737
				12,985,775
				142,797,477
Industrial — 15.3%
Aerospace & Defense — 1.7%
General Dynamics Corp.		17,100		2,367,153
Lockheed Martin Corp.		16,700		6,400,776

MML Equity Fund —  Portfolio of Investments (Continued)
	Number of Shares		Value
Northrop Grumman Corp.		10,100	$	3,186,449
				11,954,378
Building Materials — 0.8%
Fortune Brands Home & Security, Inc.		8,100		700,812
Johnson Controls International PLC		82,658		3,376,579
Masco Corp.		16,800		926,184
Owens Corning		6,400		440,384
				5,443,959
Electrical Components & Equipment — 0.3%
Emerson Electric Co.		34,800		2,281,836
Electronics — 2.3%
Agilent Technologies, Inc.		21,386		2,158,703
Arrow Electronics, Inc. (a)		4,700		369,702
Honeywell International, Inc.		60,296		9,925,325
Hubbell, Inc.		3,300		451,572
Jabil, Inc.		8,300		284,358
Keysight Technologies, Inc. (a)		11,209		1,107,225
Roper Technologies, Inc.		2,795		1,104,332
Sensata Technologies Holding PLC (a)		9,500		409,830
				15,811,047
Engineering & Construction — 0.2%
Jacobs Engineering Group, Inc.		18,456		1,712,163
Environmental Controls — 0.1%
Pentair PLC		9,600		439,392
Hand & Machine Tools — 0.3%
Lincoln Electric Holdings, Inc.		3,300		303,732
Snap-on, Inc.		3,300		485,529
Stanley Black & Decker, Inc.		8,800		1,427,360
				2,216,621
Machinery – Construction & Mining — 1.1%
BWX Technologies, Inc.		3,000		168,930
Caterpillar, Inc.		48,838		7,284,188
Oshkosh Corp.		4,100		301,350
				7,754,468
Machinery – Diversified — 1.8%
AGCO Corp.		4,300		319,361
Deere & Co.		39,100		8,665,733
Dover Corp.		8,200		888,388
The Middleby Corp. (a)		1,800		161,478
Otis Worldwide Corp.		9,952		621,204
Rockwell Automation, Inc.		8,100		1,787,508
				12,443,672
Miscellaneous - Manufacturing — 2.0%
3M Co.		31,760		5,087,317
Carlisle Cos., Inc.		3,200		391,584
Eaton Corp. PLC		24,500		2,499,735

MML Equity Fund —  Portfolio of Investments (Continued)
	Number of Shares		Value
General Electric Co.		559,282	$	3,484,327
ITT, Inc.		4,700		277,535
Parker-Hannifin Corp.		7,600		1,537,784
Textron, Inc.		7,300		263,457
				13,541,739
Packaging & Containers — 1.1%
Amcor PLC		50,400		556,920
Crown Holdings, Inc. (a)		8,000		614,880
Packaging Corp. of America		38,675		4,217,509
Sealed Air Corp.		8,900		345,409
Sonoco Products Co.		4,600		234,922
WestRock Co.		49,925		1,734,394
				7,704,034
Transportation — 3.6%
CSX Corp.		46,000		3,572,820
FedEx Corp.		6,954		1,749,070
Knight-Swift Transportation Holdings, Inc.		10,200		415,140
Norfolk Southern Corp.		29,737		6,363,421
Union Pacific Corp.		12,500		2,460,875
United Parcel Service, Inc. Class B		63,345		10,555,177
				25,116,503
				106,419,812
Technology — 14.6%
Computers — 2.1%
Apple, Inc.		28,037		3,246,965
Cognizant Technology Solutions Corp. Class A		30,800		2,138,136
HP, Inc.		81,300		1,543,887
International Business Machines Corp.		52,400		6,375,508
Leidos Holdings, Inc.		4,600		410,090
NetApp, Inc.		12,600		552,384
				14,266,970
Semiconductors — 8.8%
Analog Devices, Inc.		8,400		980,616
Applied Materials, Inc.		107,217		6,374,051
ASML Holding NV		2,591		956,778
Broadcom, Inc.		33,263		12,118,376
Intel Corp.		255,900		13,250,502
KLA Corp.		5,000		968,700
Lam Research Corp.		8,600		2,853,050
Micron Technology, Inc. (a)		111,205		5,222,187
NVIDIA Corp.		5,400		2,922,588
NXP Semiconductor NV		30,627		3,822,556
ON Semiconductor Corp. (a)		24,000		520,560
Qorvo, Inc. (a)		6,500		838,565
QUALCOMM, Inc.		66,649		7,843,254
Teradyne, Inc.		5,300		421,138
Texas Instruments, Inc.		16,276		2,324,050
				61,416,971

MML Equity Fund —  Portfolio of Investments (Continued)
	Number of Shares		Value
Software — 3.7%
CDK Global, Inc.		6,800	$	296,412
Electronic Arts, Inc. (a)		17,300		2,256,093
Fiserv, Inc. (a)		7,636		786,890
Microsoft Corp.		43,616		9,173,753
Oracle Corp.		184,400		11,008,680
salesforce.com, Inc. (a)		700		175,924
SAP SE		2,210		344,149
Synopsys, Inc. (a)		9,007		1,927,318
				25,969,219
				101,653,160
Utilities — 4.6%
Electric — 4.5%
AES Corp.		91,921		1,664,689
Ameren Corp.		27,644		2,186,088
American Electric Power Co., Inc.		38,200		3,122,086
Dominion Energy, Inc.		2,600		205,218
Duke Energy Corp.		4,033		357,162
Edison International		2,763		140,471
Entergy Corp.		10,575		1,041,955
Evergy, Inc.		13,400		680,988
Exelon Corp.		31,300		1,119,288
Iberdrola SA		3,690		45,416
NextEra Energy, Inc.		29,647		8,228,821
NRG Energy, Inc.		14,900		458,026
OGE Energy Corp.		11,400		341,886
Pinnacle West Capital Corp.		10,000		745,500
Public Service Enterprise Group, Inc.		74,949		4,115,450
Sempra Energy		39,297		4,651,193
The Southern Co.		37,377		2,026,581
Vistra Corp.		28,500		537,510
				31,668,328
Gas — 0.1%
NiSource, Inc.		25,503		561,066
				32,229,394
TOTAL COMMON STOCK                                                                                                                 (Cost $613,590,829)				679,728,380
Preferred Stock — 0.1%
Utilities — 0.1%
Electric — 0.1%
The Southern Co. Convertible 6.750%		9,130		424,910
TOTAL PREFERRED STOCK (Cost $456,500)				424,910
TOTAL EQUITIES (Cost $614,047,329)				680,153,290

MML Equity Fund —  Portfolio of Investments (Continued)
	Number of Shares		Value
Mutual Funds — 2.2%
Diversified Financial Services — 2.2%
iShares Russell 1000 Value ETF (b)		86,139	$	10,175,600
State Street Navigator Securities Lending Prime Portfolio (c)		5,086,243		5,086,243
				15,261,843
TOTAL MUTUAL FUNDS (Cost $14,786,458)				15,261,843
TOTAL LONG-TERM INVESTMENTS (Cost $628,833,787)				695,415,133
Short-Term Investments — 0.5%
Mutual Fund — 0.2%
T. Rowe Price Government Reserve Investment Fund		1,501,349		1,501,349
	Principal Amount
Repurchase Agreement — 0.3%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/20, 0.000%, due 10/01/20 (d)	$	2,357,493		2,357,493
TOTAL SHORT-TERM INVESTMENTS (Cost $3,858,842)				3,858,842
TOTAL INVESTMENTS — 100.7% (Cost $632,692,629) (e)				699,273,975
Other Assets/(Liabilities) — (0.7)%				(5,023,780	)
NET ASSETS — 100.0%			$	694,250,195

Abbreviation Legend
ETF	Exchange-Traded Fund

Notes to Portfolio of Investments
Percentages are stated as a percent of net assets.
(a)	Non-income producing security.
(b)	Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2020, was $5,592,961 or 0.81% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $610,238 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments.  (Note 2).
(c)	Represents investment of security lending cash collateral. (Note 2).
(d)	Maturity value of $2,357,493. Collateralized by U.S. Government Agency obligations with a rate of 2.375%, maturity date of 3/15/22, and an aggregate market value, including accrued interest, of $2,404,751.
(e)	See Note 3 for aggregate cost for federal tax purposes.

MML Equity Rotation Fund —  Portfolio of Investments

September 30, 2020 (Unaudited)

	Number of Shares		Value
Equities — 97.6%
Common Stock — 97.6%
Basic Materials — 2.5%
Chemicals — 1.5%
Celanese Corp.		1,840	$	197,708
Eastman Chemical Co.		300		23,436
Ecolab, Inc.		565		112,910
LyondellBasell Industries NV Class A		153		10,785
The Mosaic Co.		2,028		37,051
Nutrien Ltd. (a)		1,091		42,800
Olin Corp.		2,900		35,902
The Sherwin-Williams Co.		110		76,641
				537,233
Forest Products & Paper — 0.2%
Domtar Corp.		1,500		39,405
International Paper Co.		751		30,446
				69,851
Iron & Steel — 0.8%
Nucor Corp.		566		25,391
Reliance Steel & Aluminum Co.		2,446		249,590
Steel Dynamics, Inc.		700		20,041
				295,022
Mining — 0.0%
Arconic Corp. (b)		300		5,715
				907,821
Communications — 13.9%
Advertising — 0.1%
The Trade Desk, Inc. Class A (b)		70		36,315
Internet — 11.9%
Alphabet, Inc. Class A (b)		1,106		1,620,954
Alphabet, Inc. Class C (b)		124		182,230
Amazon.com, Inc. (b)		539		1,697,165
eBay, Inc.		7,616		396,794
Facebook, Inc. Class A (b)		520		136,188
Netflix, Inc. (b)		87		43,503
Palo Alto Networks, Inc. (b)		242		59,229
Shopify, Inc. Class A (b)		120		122,756
				4,258,819

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Media — 1.2%
Comcast Corp. Class A		8,656	$	400,427
Discovery, Inc. Class A (a) (b)		560		12,191
				412,618
Telecommunications — 0.7%
AT&T, Inc.		3,655		104,204
CenturyLink, Inc.		1,874		18,909
Cisco Systems, Inc.		2,669		105,132
Juniper Networks, Inc.		805		17,307
Verizon Communications, Inc.		237		14,099
				259,651
				4,967,403
Consumer, Cyclical — 13.9%
Airlines — 0.0%
American Airlines Group, Inc. (a)		932		11,454
Apparel — 0.1%
Ralph Lauren Corp.		690		46,899
Auto Manufacturers — 4.4%
Cummins, Inc.		4,772		1,007,656
Ford Motor Co.		2,980		19,847
PACCAR, Inc.		5,908		503,834
Wabash National Corp.		3,900		46,644
				1,577,981
Auto Parts & Equipment — 0.7%
Magna International, Inc.		5,300		242,475
Distribution & Wholesale — 0.6%
LKQ Corp. (b)		1,000		27,730
Pool Corp.		600		200,724
				228,454
Home Builders — 1.0%
Thor Industries, Inc. (a)		800		76,208
Toll Brothers, Inc.		5,926		288,359
				364,567
Leisure Time — 0.0%
Carnival Corp. (a)		527		8,000
Lodging — 0.1%
Hilton Worldwide Holdings, Inc.		243		20,733
Retail — 6.9%
Costco Wholesale Corp.		110		39,050
Dollar General Corp.		260		54,501
Dollar Tree, Inc. (b)		471		43,021
Genuine Parts Co.		1,028		97,835
The Home Depot, Inc.		930		258,270
Lowe's Cos., Inc.		326		54,070

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
McDonald's Corp.		397	$	87,138
The Michaels Cos., Inc. (a) (b)		5,800		55,999
Target Corp.		999		157,263
Tractor Supply Co.		656		94,031
Walgreens Boots Alliance, Inc.		1,782		64,010
Walmart, Inc.		10,130		1,417,288
Yum! Brands, Inc.		388		35,424
				2,457,900
Textiles — 0.1%
Mohawk Industries, Inc. (b)		200		19,518
				4,977,981
Consumer, Non-cyclical — 14.6%
Beverages — 0.2%
Brown-Forman Corp. Class A		500		34,340
Coca-Cola European Partners PLC		899		34,890
Molson Coors Beverage Co. Class B		427		14,330
				83,560
Biotechnology — 0.9%
Amgen, Inc.		174		44,224
Biogen, Inc. (b)		220		62,409
Vertex Pharmaceuticals, Inc. (b)		790		214,975
				321,608
Commercial Services — 3.8%
Automatic Data Processing, Inc.		225		31,385
CoreLogic, Inc.		200		13,534
IHS Markit Ltd.		204		16,016
ManpowerGroup, Inc.		2,155		158,026
Paylocity Holding Corp. (b)		150		24,213
PayPal Holdings, Inc. (b)		980		193,089
Quanta Services, Inc.		400		21,144
RELX PLC		4,717		105,519
Robert Half International, Inc.		1,083		57,334
S&P Global, Inc.		1,494		538,737
StoneCo Ltd. Class A (b)		200		10,578
TrueBlue, Inc. (b)		2,400		37,176
Verisk Analytics, Inc.		758		140,465
				1,347,216
Cosmetics & Personal Care — 0.1%
Colgate-Palmolive Co.		248		19,133
Foods — 0.3%
Conagra Brands, Inc.		500		17,855
General Mills, Inc.		600		37,008
The J.M. Smucker Co.		500		57,760
Pilgrim's Pride Corp. (b)		496		7,423
				120,046
Health Care – Products — 2.4%
Abbott Laboratories		1,352		147,138

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Danaher Corp.		1,717	$	369,722
Henry Schein, Inc. (b)		184		10,816
Medtronic PLC		132		13,717
Quidel Corp. (b)		90		19,744
Thermo Fisher Scientific, Inc.		611		269,769
West Pharmaceutical Services, Inc.		120		32,988
				863,894
Health Care – Services — 1.6%
Anthem, Inc.		328		88,097
Centene Corp. (b)		314		18,316
HCA Healthcare, Inc.		1,317		164,204
Laboratory Corp. of America Holdings (b)		243		45,750
Quest Diagnostics, Inc.		595		68,121
UnitedHealth Group, Inc.		561		174,903
				559,391
Household Products & Wares — 0.1%
Quanex Building Products Corp.		2,900		53,476
Pharmaceuticals — 5.2%
AbbVie, Inc.		2,707		237,106
AmerisourceBergen Corp.		995		96,435
Bristol-Myers Squibb Co.		10,621		640,340
Cardinal Health, Inc.		374		17,559
Cigna Corp.		300		50,823
CVS Health Corp.		884		51,626
DexCom, Inc. (b)		130		53,590
Horizon Therapeutics PLC (b)		237		18,410
Jazz Pharmaceuticals PLC (b)		261		37,216
McKesson Corp.		3,077		458,258
Merck & Co., Inc.		1,077		89,337
Pfizer, Inc.		2,745		100,742
				1,851,442
				5,219,766
Energy — 1.2%
Energy – Alternate Sources — 0.1%
SolarEdge Technologies, Inc. (b)		130		30,985
Oil & Gas — 0.7%
Chevron Corp.		651		46,872
Cimarex Energy Co.		490		11,922
Concho Resources, Inc.		385		16,986
Exxon Mobil Corp.		4,978		170,895
Occidental Petroleum Corp.		514		5,145
Phillips 66		154		7,983
				259,803
Oil & Gas Services — 0.3%
Schlumberger NV		6,671		103,801
Pipelines — 0.1%
Kinder Morgan, Inc.		1,993		24,574
				419,163

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Financial — 14.3%
Banks — 7.4%
Bank of America Corp.		25,300	$	609,477
CIT Group, Inc.		600		10,626
Citigroup, Inc.		14,700		633,717
The Goldman Sachs Group, Inc.		2,060		413,998
JP Morgan Chase & Co.		7,200		693,144
KeyCorp		17,863		213,106
Morgan Stanley		1,600		77,360
				2,651,428
Diversified Financial Services — 5.2%
AerCap Holdings NV (b)		2,000		50,380
Capital One Financial Corp.		504		36,217
Discover Financial Services		400		23,112
Mastercard, Inc. Class A		1,155		390,586
Nasdaq, Inc.		170		20,861
SEI Investments Co.		2,300		116,656
Synchrony Financial		5,400		141,318
Visa, Inc. Class A		5,460		1,091,836
				1,870,966
Insurance — 1.5%
Aflac, Inc.		3,600		130,860
Berkshire Hathaway, Inc. Class B (b)		1,900		404,586
				535,446
Real Estate Investment Trusts (REITS) — 0.2%
Iron Mountain, Inc. (a)		1,000		26,790
SBA Communications Corp.		110		35,033
				61,823
				5,119,663
Industrial — 8.5%
Aerospace & Defense — 0.4%
Barnes Group, Inc.		900		32,166
Lockheed Martin Corp.		147		56,342
Raytheon Technologies Corp.		635		36,538
Spirit AeroSystems Holdings, Inc. Class A		172		3,253
				128,299
Building Materials — 0.5%
Carrier Global Corp.		3,635		111,013
Patrick Industries, Inc.		1,100		63,272
				174,285
Electrical Components & Equipment — 0.0%
AMETEK, Inc.		140		13,916

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Electronics — 1.9%
Agilent Technologies, Inc.		300	$	30,282
Allegion PLC		195		19,287
Amphenol Corp. Class A		237		25,660
Garmin Ltd.		212		20,110
Honeywell International, Inc.		1,320		217,285
Keysight Technologies, Inc. (b)		1,270		125,451
Roper Technologies, Inc.		110		43,462
Sensata Technologies Holding PLC (b)		954		41,156
TE Connectivity Ltd.		838		81,906
Trimble, Inc. (b)		200		9,740
TTM Technologies, Inc. (b)		4,400		50,204
				664,543
Engineering & Construction — 0.4%
AECOM (b)		957		40,041
Arcosa, Inc.		2,083		91,839
				131,880
Environmental Controls — 0.5%
Republic Services, Inc.		754		70,386
Waste Management, Inc.		895		101,287
				171,673
Machinery – Diversified — 1.4%
AGCO Corp.		4,400		326,788
Cognex Corp.		300		19,530
Dover Corp.		307		33,261
Ingersoll Rand, Inc. (b)		420		14,952
Otis Worldwide Corp.		1,817		113,417
				507,948
Miscellaneous - Manufacturing — 0.6%
3M Co.		158		25,308
Eaton Corp. PLC		1,193		121,722
General Electric Co.		2,143		13,351
Parker-Hannifin Corp.		73		14,771
Trane Technologies PLC		476		57,715
				232,867
Packaging & Containers — 0.8%
WestRock Co.		8,100		281,394
Shipbuilding — 0.1%
Huntington Ingalls Industries, Inc.		246		34,624
Transportation — 1.9%
Kansas City Southern		280		50,632
Norfolk Southern Corp.		1,800		385,182
Union Pacific Corp.		1,220		240,182
				675,996
				3,017,425

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Technology — 28.7%
Computers — 9.5%
Accenture PLC Class A		158	$	35,706
Apple, Inc.		21,548		2,495,474
Cognizant Technology Solutions Corp. Class A		2,025		140,575
Crowdstrike Holdings, Inc. Class A (b)		220		30,210
DXC Technology Co.		10,081		179,946
Fortinet, Inc. (b)		960		113,098
HP, Inc.		803		15,249
International Business Machines Corp.		1,246		151,601
Seagate Technology PLC		5,006		246,646
				3,408,505
Semiconductors — 8.7%
Advanced Micro Devices, Inc. (b)		751		61,575
Applied Materials, Inc.		2,244		133,406
ASML Holding NV		810		299,109
Broadcom, Inc.		2,798		1,019,367
Entegris, Inc.		100		7,434
Intel Corp.		896		46,395
KLA Corp.		680		131,743
Lam Research Corp.		1,295		429,616
Micron Technology, Inc. (b)		9,400		441,424
Monolithic Power Systems, Inc.		90		25,165
NVIDIA Corp.		670		362,617
Skyworks Solutions, Inc.		900		130,950
Texas Instruments, Inc.		176		25,131
				3,113,932
Software — 10.5%
ANSYS, Inc. (b)		281		91,952
Citrix Systems, Inc.		259		35,667
Fair Isaac Corp. (b)		330		140,375
j2 Global, Inc. (b)		500		34,610
Microsoft Corp.		12,722		2,675,818
MSCI, Inc.		760		271,153
Oracle Corp.		421		25,134
Paychex, Inc.		641		51,133
Take-Two Interactive Software, Inc. (b)		120		19,826
Veeva Systems, Inc. Class A (b)		866		243,511
VMware, Inc. Class A (a) (b)		1,038		149,129
				3,738,308
				10,260,745
TOTAL COMMON STOCK (Cost $28,514,868)				34,889,967
TOTAL EQUITIES (Cost $28,514,868)				34,889,967

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Warrants — 0.0%
Energy — 0.0%
Oil & Gas — 0.0%
Occidental Petroleum Corp., Expires 8/03/27 (b)		64	$	192
TOTAL WARRANTS (Cost $317)				192
Rights — 0.0%
Consumer, Non-cyclical — 0.0%
Pharmaceuticals — 0.0%
Bristol-Myers Squibb Co., Expires 3/31/21 (b)		993		2,234
TOTAL RIGHTS (Cost $2,115)				2,234
Mutual Funds — 0.4%
Diversified Financial Services — 0.4%
State Street Navigator Securities Lending Prime Portfolio (c)		133,048		133,048
TOTAL MUTUAL FUNDS (Cost $133,048)				133,048
TOTAL LONG-TERM INVESTMENTS (Cost $28,650,348)				35,025,441

	Principal Amount
Short-Term Investments — 2.5%
Repurchase Agreement — 2.5%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/20, 0.000%, due 10/01/20 (d)	$	895,491		895,491
TOTAL SHORT-TERM INVESTMENTS (Cost $895,491)				895,491
TOTAL INVESTMENTS — 100.5% (Cost $29,545,839) (e)				35,920,932
Other Assets/(Liabilities) — (0.5)%				(179,950	)
NET ASSETS — 100.0%			$	35,740,982

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2020, was $378,625 or 1.06% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $255,871 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments.  (Note 2).
(b)	Non-income producing security.
(c)	Represents investment of security lending cash collateral. (Note 2).
(d)	Maturity value of $895,491. Collateralized by U.S. Government Agency obligations with a rate of 2.375%, maturity date of 3/15/22, and an aggregate market value, including accrued interest, of $913,462.
(e)	See Note 3 for aggregate cost for federal tax purposes.

MML High Yield Fund — Portfolio of Investments

September 30, 2020 (Unaudited)

	Number of Shares		Value
Equities — 0.1%
Common Stock — 0.1%
Consumer, Non-cyclical — 0.0%
Agriculture — 0.0%
Pinnacle Operating Corp. (a) (b)		178,174	$	—
Energy — 0.1%
Oil & Gas — 0.1%
Fieldwood Energy LLC (b)		3,193		33
Fieldwood Energy LLC (b)		13,011		130
Jupiter Resources, Inc. (b)		191,606		143,704
				143,867
TOTAL COMMON STOCK (Cost $1,318,416)				143,867
TOTAL EQUITIES (Cost $1,318,416)				143,867

	Principal Amount
Bonds & Notes — 97.8%
Bank Loans — 4.3%
Oil & Gas — 0.0%
Fieldwood Energy LLC, Exit 2nd Lien Term Loan, 0.000% 4/11/23 (c)	$	387,384	89
Packaging & Containers — 1.8%
BWAY Holding Co., 2017 Term Loan B, 3 mo. LIBOR + 3.250% 3.523% VRN 4/03/24		1,184,496	1,109,730
Consolidated Energy Finance, SA, Term Loan B, 1 mo. LIBOR + 2.500% 2.656% VRN 5/07/25		883,485	802,867
Trident TPI Holdings, Inc., 2017 USD Term Loan B1, 3 mo. LIBOR + 3.000% 4.000% VRN 10/17/24		161,721	157,476
			2,070,073
Software — 2.5%
Banff Merger Sub, Inc., 2018 USD Term Loan B, 1 mo. LIBOR + 4.250% 4.397% VRN 10/02/25		860,644	833,457
Finastra USA, Inc.
USD 1st Lien Term Loan, 3 mo. LIBOR + 3.500%, 6 mo. LIBOR + 3.500% 4.500% VRN 6/13/24		919,552	857,712

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
USD 2nd Lien Term Loan, 6 mo. LIBOR + 7.250% 8.250% VRN 6/13/25	$	1,400,000	$	1,311,100
				3,002,269
TOTAL BANK LOANS (Cost $5,444,882)				5,072,431
Corporate Debt — 93.5%
Advertising — 0.4%
Terrier Media Buyer, Inc. 8.875% 12/15/27 (d)		523,000		526,922
Aerospace & Defense — 3.9%
Signature Aviation US Holdings, Inc. 4.000% 3/01/28 (d)		651,000		605,430
TransDigm, Inc. 5.500% 11/15/27		963,000		925,491
6.250% 3/15/26 (d)		316,000		329,997
6.375% 6/15/26		654,000		656,570
8.000% 12/15/25 (d)		255,000		277,313
Triumph Group, Inc. 5.250% 6/01/22		305,000		250,100
6.250% 9/15/24 (d)		306,000		260,418
7.750% 8/15/25		1,243,000		797,074
8.875% 6/01/24 (d)		466,000		496,290
				4,598,683
Agriculture — 0.4%
JBS Investments II GmbH 7.000% 1/15/26 (d)		390,000		416,325
Airlines — 0.1%
American Airlines Group, Inc. 3.750% 3/01/25 (d)		218,000		110,533
Auto Manufacturers — 4.2%
Allison Transmission, Inc. 4.750% 10/01/27 (d)		589,000		605,934
Ford Motor Co. 7.450% 7/16/31		472,000		544,570
8.500% 4/21/23		312,000		340,080
9.000% 4/22/25		241,000		276,309
9.625% 4/22/30		726,000		937,447
Ford Motor Credit Co. LLC 3.087% 1/09/23		92,000		90,150
3.664% 9/08/24		200,000		195,705
4.125% 8/17/27		289,000		281,052
4.134% 8/04/25		200,000		198,083
4.542% 8/01/26		1,039,000		1,036,538
5.596% 1/07/22		200,000		204,500
5.875% 8/02/21		281,000		286,269
				4,996,637
Auto Parts & Equipment — 0.5%
Adient Global Holdings Ltd. 4.875% 8/15/26 (d)		170,000		161,925

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Clarios Global LP/Clarios US Finance Co. 8.500% 5/15/27 (d)	$	467,000	$	482,177
				644,102
Building Materials — 2.3%
Cemex SAB de CV 5.200% 9/17/30 (d)		218,000		219,068
7.375% 6/05/27 (d)		352,000		380,340
Cornerstone Building Brands, Inc. 6.125% 1/15/29 (d)		171,000		173,204
Forterra Finance LLC / FRTA Finance Corp. 6.500% 7/15/25 (d)		150,000		158,483
Griffon Corp. 5.750% 3/01/28		211,000		220,248
James Hardie International Finance DAC 4.750% 1/15/25 (d)		126,000		128,678
5.000% 1/15/28 (d)		485,000		505,612
PGT Innovations, Inc. 6.750% 8/01/26 (d)		368,000		391,920
Standard Industries, Inc. 4.750% 1/15/28 (d)		581,000		602,787
				2,780,340
Chemicals — 1.8%
CF Industries, Inc. 4.950% 6/01/43		63,000		73,258
5.375% 3/15/44		240,000		288,811
Consolidated Energy Finance SA 6.875% 6/15/25 (d)		915,000		832,650
CVR Partners LP/CVR Nitrogen Finance Corp. 9.250% 6/15/23 (d)		451,000		417,175
Nouryon Holding BV 8.000% 10/01/26 (d)		141,000		149,246
Valvoline, Inc. 4.250% 2/15/30 (d)		206,000		210,120
4.375% 8/15/25		157,000		161,514
				2,132,774
Coal — 1.7%
Peabody Energy Corp. 6.000% 3/31/22 (d)		1,383,000		802,140
SunCoke Energy Partners LP/SunCoke Energy Partners Finance Corp. 7.500% 6/15/25 (d)		759,000		684,633
Warrior Met Coal, Inc. 8.000% 11/01/24 (d)		534,000		543,847
				2,030,620
Commercial Services — 0.9%
Korn Ferry 4.625% 12/15/27 (d)		95,000		95,950
Prime Security Services Borrower LLC / Prime Finance, Inc. 6.250% 1/15/28 (d)		802,000		812,025

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
United Rentals North America, Inc. 3.875% 2/15/31	$	168,000	$	170,520
				1,078,495
Computers — 2.4%
Banff Merger Sub, Inc. 9.750% 9/01/26 (d)		466,000		492,609
Dell International LLC/EMC Corp. 7.125% 6/15/24 (d)		904,000		940,332
Diebold Nixdorf, Inc. 9.375% 7/15/25 (d)		675,000		712,125
NCR Corp. 5.000% 10/01/28 (d)		235,000		235,188
5.250% 10/01/30 (d)		113,000		113,000
Science Applications International Corp. 4.875% 4/01/28 (d)		189,000		191,890
Western Digital Corp. 4.750% 2/15/26		104,000		112,645
				2,797,789
Distribution & Wholesale — 1.7%
Core & Main Holdings LP 8.625% 9/15/24 (d)		155,000		156,163
Core & Main LP 6.125% 8/15/25 (d)		313,000		317,046
KAR Auction Services, Inc. 5.125% 6/01/25 (d)		475,000		474,990
Resideo Funding, Inc. 6.125% 11/01/26 (d)		800,000		788,000
Univar Solutions USA, Inc. 5.125% 12/01/27 (d)		254,000		260,667
				1,996,866
Diversified Financial Services — 2.3%
Alliance Data Systems Corp. 4.750% 12/15/24 (d)		767,000		718,909
Global Aircraft Leasing Co. Ltd. 6.500% 9/15/24 (d)		1,895,301		1,056,631
LPL Holdings, Inc. 4.625% 11/15/27 (d)		346,000		349,460
5.750% 9/15/25 (d)		87,000		90,148
OneMain Finance Corp. 5.375% 11/15/29		552,000		574,080
				2,789,228
Electric — 2.6%
NRG Energy, Inc. 5.250% 6/15/29 (d)		374,000		406,725
6.625% 1/15/27		702,000		742,365
PG&E Corp. 5.000% 7/01/28		567,000		549,990
5.250% 7/01/30		289,000		279,607
Pike Corp. 5.500% 9/01/28 (d)		447,000		449,767

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Vistra Operations Co. LLC 4.300% 7/15/29 (d)	$	568,000	$	619,985
				3,048,439
Electrical Components & Equipment — 0.4%
WESCO Distribution, Inc. Co. 7.125% 6/15/25 (d)		233,000		253,807
7.250% 6/15/28 (d)		241,000		264,058
				517,865
Engineering & Construction — 0.4%
New Enterprise Stone & Lime Co., Inc. 9.750% 7/15/28 (d)		323,000		348,840
Weekley Homes LLC / Weekley Finance Corp. 4.875% 9/15/28 (d)		152,000		153,520
				502,360
Entertainment — 2.2%
Banijay Entertainment SASU 5.375% 3/01/25 (d)		241,000		242,506
Caesars Entertainment, Inc. 6.250% 7/01/25 (d)		432,000		451,546
8.125% 7/01/27 (d)		443,000		469,580
Caesars Resort Collection LLC / CRC Finco, Inc. 5.750% 7/01/25 (d)		242,000		249,563
Caesars Resort Collection LLC/CRC Finco, Inc. 5.250% 10/15/25 (d)		266,000		257,355
Live Nation Entertainment, Inc. 4.750% 10/15/27 (d)		407,000		381,180
Scientific Games International, Inc. 5.000% 10/15/25 (d)		204,000		205,020
7.250% 11/15/29 (d)		187,000		189,805
8.250% 3/15/26 (d)		37,000		38,631
8.625% 7/01/25 (d)		147,000		153,391
				2,638,577
Foods — 3.9%
JBS USA LUX SA/JBS USA Finance, Inc. 5.875% 7/15/24 (d)		323,000		329,492
6.750% 2/15/28 (d)		824,000		896,034
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc. 5.500% 1/15/30 (d)		826,000		899,076
6.500% 4/15/29 (d)		1,094,000		1,214,307
Kraft Heinz Foods Co. 3.750% 4/01/30 (d)		126,000		133,095
3.875% 5/15/27 (d)		250,000		264,803
4.250% 3/01/31 (d)		204,000		223,819
5.200% 7/15/45		178,000		194,596
6.500% 2/09/40		94,000		119,466
6.875% 1/26/39		206,000		275,928
Simmons Foods, Inc. 7.750% 1/15/24 (d)		100,000		104,750
				4,655,366

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Forest Products & Paper — 0.2%
Clearwater Paper Corp. 4.750% 8/15/28 (d)	$	230,000	$	230,575
Hand & Machine Tools — 0.5%
Apex Tool Group LLC/BC Mountain Finance, Inc. 9.000% 2/15/23 (d)		701,000		648,425
Health Care – Products — 1.1%
Avanos Medical, Inc. 6.250% 10/15/22		1,300,000		1,300,520
Health Care – Services — 4.1%
Centene Corp. 4.250% 12/15/27		241,000		252,190
4.625% 12/15/29		918,000		990,210
5.250% 4/01/25 (d)		232,000		241,106
5.375% 6/01/26 (d)		52,000		54,795
Encompass Health Corp. Co. 4.625% 4/01/31 (e)		189,000		189,000
HCA, Inc. 3.500% 9/01/30		1,106,000		1,126,881
Molina Healthcare, Inc. 4.375% 6/15/28 (d)		200,000		204,100
Radiology Partners, Inc. 9.250% 2/01/28 (d)		300,000		312,000
Tenet Healthcare Corp. 4.625% 7/15/24		400,000		402,000
4.625% 9/01/24 (d)		323,000		325,623
6.125% 10/01/28 (d)		350,000		340,375
8.125% 4/01/22		340,000		378,046
				4,816,326
Home Builders — 2.0%
Brookfield Residential Properties, Inc. 6.375% 5/15/25 (d)		491,000		491,000
Brookfield Residential Properties, Inc. / Brookfield Residential US Corp. 4.875% 2/15/30 (d)		261,000		244,298
M/I Homes, Inc. 4.950% 2/01/28		368,000		379,040
Mattamy Group Corp. 4.625% 3/01/30 (d)		668,000		676,417
STL Holding Co. LLC 7.500% 2/15/26 (d)		440,000		441,650
TRI Pointe Group, Inc. 5.700% 6/15/28		153,000		167,535
				2,399,940
Housewares — 0.4%
Newell Brands, Inc. 4.700% STEP 4/01/26		337,000		358,905
5.875% STEP 4/01/36		126,000		144,315
				503,220
Insurance — 1.0%
Acrisure LLC/Acrisure Finance, Inc.

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
7.000% 11/15/25 (d)	$	691,000	$	678,821
8.125% 2/15/24 (d)		509,000		533,178
				1,211,999
Internet — 1.7%
Netflix, Inc. 4.875% 6/15/30 (d)		321,000		365,940
5.375% 11/15/29 (d)		523,000		616,434
5.875% 11/15/28		595,000		709,957
Northwest Fiber LLC / Northwest Fiber Finance Sub, Inc. 10.750% 6/01/28 (d)		121,000		131,890
Uber Technologies, Inc. 6.250% 1/15/28 (d)		174,000		178,733
				2,002,954
Investment Companies — 0.9%
Icahn Enterprises LP/ Icahn Enterprises Finance Corp. 4.750% 9/15/24		141,000		142,763
Icahn Enterprises LP/Icahn Enterprises Finance Corp. 5.250% 5/15/27		113,000		117,723
6.375% 12/15/25		761,000		782,281
				1,042,767
Iron & Steel — 0.2%
Big River Steel LLC / BRS Finance Corp. 6.625% 1/31/29 (d)		254,000		256,832
Leisure Time — 1.6%
Brunswick Corp. 7.375% 9/01/23		285,000		329,425
7.125% 8/01/27		569,000		701,976
Carlson Travel, Inc. 6.750% 12/15/25 (d)		296,000		223,480
11.500% 12/15/26 (d)		988,000		595,181
				1,850,062
Lodging — 1.4%
Wyndham Destinations, Inc. 6.625% 7/31/26 (d)		213,000		223,141
Wyndham Hotels & Resorts, Inc. 4.375% 8/15/28 (d)		185,000		179,450
Wynn Las Vegas LLC/Wynn Las Vegas Capital Corp. 5.250% 5/15/27 (d)		385,000		358,050
5.500% 3/01/25 (d)		740,000		698,375
Wynn Macau Ltd. 5.125% 12/15/29 (d)		268,000		257,139
				1,716,155
Machinery – Diversified — 0.3%
Clark Equipment Co. 5.875% 6/01/25 (d)		291,000		301,549
Vertical US Newco, Inc. 5.250% 7/15/27 (d)		84,000		87,298
				388,847

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Media — 6.8%
Altice Financing SA 5.000% 1/15/28 (d)	$	316,000	$	306,915
Block Communications, Inc. 4.875% 3/01/28 (d)		340,000		346,800
CCO Holdings LLC/CCO Holdings Capital Corp. 4.500% 8/15/30 (d)		702,000		737,131
4.500% 5/01/32 (d)		647,000		675,306
4.750% 3/01/30 (d)		236,000		249,865
Clear Channel Worldwide Holdings, Inc. 5.125% 8/15/27 (d)		313,000		300,558
9.250% 2/15/24		210,000		203,574
CSC Holdings LLC 3.375% 2/15/31 (d)		500,000		484,125
4.625% 12/01/30 (d)		484,000		487,630
DISH DBS Corp. 5.000% 3/15/23		207,000		211,140
7.750% 7/01/26		217,000		238,561
DISH Network Corp. 3.375% 8/15/26		680,000		624,238
LCPR Senior Secured Financing DAC 6.750% 10/15/27 (d)		314,000		328,130
Midcontinent Communications / Midcontinent Finance Corp. 5.375% 8/15/27 (d)		205,000		210,637
Radiate Holdco LLC / Radiate Finance, Inc. 4.500% 9/15/26 (d)		397,000		396,917
6.500% 9/15/28 (d)		502,000		514,431
Sirius XM Radio, Inc. 5.375% 7/15/26 (d)		167,000		173,797
5.500% 7/01/29 (d)		226,000		242,385
TEGNA, Inc. 4.625% 3/15/28 (d)		447,000		437,077
Townsquare Media, Inc. 6.500% 4/01/23 (d)		124,000		113,615
Virgin Media Finance PLC 5.000% 7/15/30 (d)		147,000		146,265
Ziggo BV 4.875% 1/15/30 (d)		153,000		158,355
5.500% 1/15/27 (d)		440,000		460,900
				8,048,352
Mining — 4.2%
Compass Minerals International, Inc. 4.875% 7/15/24 (d)		294,000		299,942
6.750% 12/01/27 (d)		350,000		378,000
First Quantum Minerals Ltd. 6.875% 10/15/27 (d) (e)		800,000		771,000
7.250% 4/01/23 (d)		659,000		658,176
7.500% 4/01/25 (d)		647,000		639,954
Freeport-McMoRan, Inc. 4.125% 3/01/28		69,000		69,862
4.375% 8/01/28		359,000		371,190
4.625% 8/01/30		600,000		630,870
Hudbay Minerals, Inc. 6.125% 4/01/29 (d)		147,000		145,530
Kinross Gold Corp. 6.875% 9/01/41		476,000		623,253

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Northwest Acquisitions ULC/Dominion Finco, Inc. 7.125% 11/01/22 (c) (d)	$	884,000	$	14,144
Novelis Corp. 4.750% 1/30/30 (d)		417,000		409,586
				5,011,507
Miscellaneous - Manufacturing — 1.2%
Amsted Industries, Inc. 5.625% 7/01/27 (d)		617,000		656,377
Gates Global LLC / Gates Corp. 6.250% 1/15/26 (d)		700,000		721,553
				1,377,930
Oil & Gas — 7.3%
Antero Resources Corp. 5.375% 11/01/21		410,000		389,500
Apache Corp. 4.375% 10/15/28		130,000		118,950
4.750% 4/15/43		65,000		57,809
5.100% 9/01/40		130,000		116,431
5.350% 7/01/49		197,000		173,852
Cenovus Energy, Inc. 4.250% 4/15/27		93,000		84,079
5.400% 6/15/47		138,000		116,589
6.750% 11/15/39		155,000		155,829
Continental Resources, Inc. 3.800% 6/01/24		149,000		137,453
4.375% 1/15/28		168,000		145,530
CVR Energy, Inc. 5.750% 2/15/28 (d)		1,323,000		1,124,550
Endeavor Energy Resources LP / EER Finance, Inc. 6.625% 7/15/25 (d)		295,000		303,112
Hilcorp Energy I LP / Hilcorp Finance Co. 5.000% 12/01/24 (d)		79,000		71,693
5.750% 10/01/25 (d)		43,000		38,915
6.250% 11/01/28 (d)		365,000		332,150
Jonah Energy LLC/Jonah Energy Finance Corp. 7.250% 10/15/25 (d)		745,000		82,881
Jupiter Resources, Inc 10.000% 1/31/24 (a) (f)		231,906		225,280
Laredo Petroleum, Inc. 9.500% 1/15/25		268,000		159,707
10.125% 1/15/28		330,000		194,700
MEG Energy Corp. 7.125% 2/01/27 (d)		379,000		339,899
Nabors Industries Ltd. 7.250% 1/15/26 (d)		184,000		90,620
7.500% 1/15/28 (d)		119,000		57,269
Neptune Energy Bondco PLC 6.625% 5/15/25 (d)		594,000		529,800
Occidental Petroleum Corp. 2.700% 8/15/22		163,000		152,302
2.700% 2/15/23		65,000		59,475
2.900% 8/15/24		93,000		78,904
3.500% 6/15/25		190,000		157,700
4.200% 3/15/48		31,000		21,313
4.400% 4/15/46		198,000		140,622

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
4.400% 8/15/49	$	78,000	$	54,608
4.500% 7/15/44		81,000		57,966
5.875% 9/01/25		178,000		163,130
6.200% 3/15/40		550,000		455,730
6.375% 9/01/28		182,000		168,477
6.450% 9/15/36		215,000		183,287
6.600% 3/15/46		352,000		303,160
6.950% 7/01/24		88,000		85,166
Ovintiv, Inc. 6.500% 8/15/34		108,000		100,572
6.500% 2/01/38		47,000		42,682
7.200% 11/01/31		29,000		28,728
7.375% 11/01/31		17,000		16,972
Parkland Corp. 5.875% 7/15/27 (d)		247,000		259,659
PBF Holding Co. LLC / PBF Finance Corp. 6.000% 2/15/28 (d)		1,474,000		989,128
9.250% 5/15/25 (d)		82,000		84,052
				8,650,231
Oil & Gas Services — 0.5%
Welltec A/S 9.500% 12/01/22 (d)		696,000		612,480
Packaging & Containers — 1.1%
Graphic Packaging International LLC 3.500% 3/15/28 (d)		194,000		193,515
Mauser Packaging Solutions Holding Co. 7.250% 4/15/25 (d)		781,000		735,116
Trident TPI Holdings, Inc. 9.250% 8/01/24 (d)		386,000		409,759
				1,338,390
Pharmaceuticals — 2.2%
Bausch Health Americas, Inc. 8.500% 1/31/27 (d)		250,000		274,688
9.250% 4/01/26 (d)		600,000		660,000
Bausch Health Cos., Inc. 5.000% 1/30/28 (d)		446,000		433,177
5.250% 1/30/30 (d)		320,000		315,200
5.500% 3/01/23 (d)		140,000		139,475
5.875% 5/15/23 (d)		5,000		4,975
6.125% 4/15/25 (d)		75,000		76,781
Par Pharmaceutical, Inc. 7.500% 4/01/27 (d)		629,000		658,991
				2,563,287
Pipelines — 3.9%
Buckeye Partners LP 5.850% 11/15/43		66,000		61,139
Cheniere Energy Partners LP 4.500% 10/01/29		271,000		277,984
5.625% 10/01/26		725,000		754,000
DCP Midstream Operating LP 5.625% 7/15/27		216,000		220,968
6.450% 11/03/36 (d)		10,000		9,583

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
EnLink Midstream LLC 5.375% 6/01/29	$	173,000	$	140,130
EnLink Midstream Partners LP 4.850% 7/15/26		56,000		48,446
EQM Midstream Partners LP 6.000% 7/01/25 (d)		182,000		187,688
6.500% 7/01/27 (d)		151,000		160,063
Genesis Energy LP/Genesis Energy Finance Corp. 6.000% 5/15/23		765,000		694,237
6.500% 10/01/25		440,000		380,600
Harvest Midstream I LP 7.500% 9/01/28 (d)		228,000		226,860
PBF Logistics LP / PBF Logistics Finance Corp. 6.875% 5/15/23		400,000		376,000
Targa Resources Partners LP/Targa Resources Partners Finance Corp. 4.875% 2/01/31 (d)		295,000		285,685
5.000% 1/15/28		33,000		32,175
5.500% 3/01/30 (d)		28,000		28,029
6.875% 1/15/29		61,000		65,252
Western Midstream Operating LP 5.050% STEP 2/01/30		145,000		141,123
5.300% 3/01/48		399,000		321,195
5.450% 4/01/44		202,000		172,710
				4,583,867
Real Estate Investment Trusts (REITS) — 2.7%
ESH Hospitality, Inc. 4.625% 10/01/27 (d)		388,000		380,733
Iron Mountain, Inc. 5.250% 7/15/30 (d)		303,000		315,877
MPT Operating Partnership LP/MPT Finance Corp. 5.000% 10/15/27		539,000		562,015
Park Intermediate Holdings LLC / PK Domestic Property LLC / PK Finance Co-Issuer 5.875% 10/01/28 (d)		108,000		107,730
RHP Hotel Properties LP/RHP Finance Corp. 4.750% 10/15/27		425,000		391,816
5.000% 4/15/23		789,000		772,644
Service Properties Trust 3.950% 1/15/28		73,000		60,590
4.375% 2/15/30		115,000		95,450
4.950% 2/15/27		58,000		51,620
7.500% 9/15/25		467,000		496,281
				3,234,756
Retail — 1.6%
Asbury Automotive Group, Inc. 4.500% 3/01/28 (d)		152,000		152,950
Penske Automotive Group, Inc. 3.500% 9/01/25		500,000		497,962
5.500% 5/15/26		1,000,000		1,031,580
Specialty Building Products Holdings LLC / SBP Finance Corp. 6.375% 9/30/26 (d)		193,000		196,378
				1,878,870

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Software — 3.8%
BY Crown Parent LLC 7.375% 10/15/24 (d)	$	191,000	$	193,865
CDK Global, Inc. 5.250% 5/15/29 (d)		66,000		70,290
Open Text Corp. 3.875% 2/15/28 (d)		302,000		305,491
Open Text Holdings, Inc. 4.125% 2/15/30 (d)		131,000		134,726
Solera LLC/ Solera Finance, Inc. 10.500% 3/01/24 (d)		465,000		485,925
SS&C Technologies, Inc. 5.500% 9/30/27 (d)		720,000		765,158
Veritas US, Inc./Veritas Bermuda Ltd. 7.500% 9/01/25 (d)		700,000		721,875
10.500% 2/01/24 (d)		2,020,000		1,899,608
				4,576,938
Storage & Warehousing — 0.9%
LBC Tank Terminals Holding Netherlands BV 6.875% 5/15/23 (d)		1,111,000		1,102,667
Telecommunications — 5.5%
Avaya, Inc. 6.125% 9/15/28 (d)		260,000		265,096
CenturyLink, Inc. 5.125% 12/15/26 (d)		526,000		540,407
CommScope Technologies Finance LLC 6.000% 6/15/25 (d)		211,000		213,859
CommScope Technologies LLC 5.000% 3/15/27 (d)		174,000		167,040
CommScope, Inc. 7.125% 7/01/28 (d)		200,000		205,500
8.250% 3/01/27 (d)		270,000		280,800
Consolidated Communications, Inc. 6.500% 10/01/28 (d) (e)		391,000		398,820
Hughes Satellite Systems Corp. 6.625% 8/01/26		687,000		743,471
Sprint Capital Corp. 8.750% 3/15/32		126,000		184,440
Sprint Corp. 7.625% 3/01/26		386,000		466,437
7.875% 9/15/23		1,386,000		1,592,168
Telecom Italia Capital 6.000% 9/30/34		150,000		174,000
Telecom Italia SpA 5.303% 5/30/24 (d)		586,000		634,345
ViaSat, Inc. 5.625% 4/15/27 (d)		197,000		202,664
6.500% 7/15/28 (d)		387,000		387,561
Windstream Escrow LLC / Windstream Escrow Finance Corp. 7.750% 8/15/28 (d)		116,000		113,970
				6,570,578
Toys, Games & Hobbies — 0.5%
Mattel, Inc. 6.750% 12/31/25 (d)		305,000		321,775

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
5.875% 12/15/27 (d)	$	224,000	$	241,080
				562,855
Transportation — 3.8%
Kenan Advantage Group, Inc. 7.875% 7/31/23 (d)		3,200,000		3,104,000
Mileage Plus Holdings LLC / Mileage Plus Intellectual Property Assets Ltd. 6.500% 6/20/27 (d)		265,000		275,931
XPO Logistics, Inc. 6.250% 5/01/25 (d)		350,000		374,016
6.750% 8/15/24 (d)		716,000		758,387
				4,512,334
TOTAL CORPORATE DEBT (Cost $113,424,709)				111,255,585
TOTAL BONDS & NOTES (Cost $118,869,591)				116,328,016

	Number of Shares
Warrants — 0.0%
Basic Materials — 0.0%
Forest Products & Paper — 0.0%
Appvion Holding Corp. Tranche A, Expires 6/13/23, Strike price 31.25 (a) (b) (f)		2,106		—
Appvion Holding Corp. Tranche B, Expires 6/13/23, Strike price 31.25 (a) (b) (f)		2,106		—
				—
TOTAL WARRANTS (Cost $0)				—
TOTAL LONG-TERM INVESTMENTS (Cost $120,188,007)				116,471,883
TOTAL INVESTMENTS — 97.9% (Cost $120,188,007) (g)				116,471,883
Other Assets/(Liabilities) — 2.1%				2,521,173
NET ASSETS — 100.0%			$	118,993,056

Abbreviation Legend 

STEP	Step Up Bond
VRN	Variable Rate Note

Notes to Portfolio of Investments 

Percentages are stated as a percent of net assets. 

(a)  This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At September 30, 2020, these securities amounted to a value of $225,280 or 0.19% of net assets.

(b)  Non-income producing security.

(c)  Security is currently in default due to bankruptcy or failure to make payment of principal or interest of the issuer. Income is not being accrued. At September 30, 2020, these securities amounted to a value of $14,233 or 0.01% of net assets.

(d)  Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At September 30, 2020, the aggregate market value of these securities amounted to $73,874,228 or 62.08% of net assets.

(e)  A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.

(f)  Investment was valued using significant unobservable inputs.

(g)  See Note 3 for aggregate cost for federal tax purposes.

MML Inflation-Protected and Income Fund —  Portfolio of Investments

September 30, 2020 (Unaudited)

	Principal Amount		Value
Bonds & Notes — 89.0%
Municipal Obligations — 0.0%
Louisiana State Public Facilities Authority, Revenue Bonds, Series 2011-A, Class A2, 3 mo. USD LIBOR
1.168% FRN 4/26/27	$	24,791	$	24,811
TOTAL MUNICIPAL OBLIGATIONS (Cost $24,791)				24,811
Non-U.S. Government Agency Obligations — 62.4%
Auto Floor Plan Asset-Backed Securities — 3.6%
Navistar Financial Dealer Note Master Owner Trust II
Series 2019-1, Class A, 1 mo. USD LIBOR + .640% 0.788% FRN 5/25/24 (a)		5,700,000		5,693,922
Series 2019-1, Class B, 1 mo. USD LIBOR + .750% 0.898% FRN 5/25/24 (a)		3,000,000		2,993,032
Series 2019-1, Class C, 1 mo. USD LIBOR + .950% 1.098% FRN 5/25/24 (a)		1,300,000		1,293,231
NextGear Floorplan Master Owner Trust, Series 2017-2A, Class A1, 1 mo. USD LIBOR + .680%
0.832% FRN 10/17/22 (a)		2,000,000		2,000,200
				11,980,385
Automobile Asset-Backed Securities — 12.5%
American Credit Acceptance Receivables Trust
Series 2019-1, Class C, 3.500% 4/14/25 (a)		1,300,000		1,328,946
Series 2018-3, Class C, 3.750% 10/15/24 (a)		2,741,364		2,764,000
AmeriCredit Automobile Receivables Trust, Series 2020-2, Class A2A
0.600% 12/18/23		3,444,000		3,450,197
Avis Budget Rental Car Funding AESOP LLC, Series 2019-1A, Class C
4.530% 3/20/23 (a)		388,000		392,901
CarMax Auto Owner Trust, Series 2017-2, Class D
3.390% 10/16/23		2,400,000		2,443,497
Chesapeake Funding II LLC, Series 2018-1A, Class A2, 1 mo. USD LIBOR + .450%
0.602% FRN 4/15/30 (a)		439,174		439,586
CPS Auto Trust, Series 2018-C, Class B
3.430% 7/15/22 (a)		25,894		25,914
Drive Auto Receivables Trust, Series 2019-1, Class C
3.780% 4/15/25		963,000		991,099
Exeter Automobile Receivables Trust
Series 2020-2A, Class A, 1.130% 8/15/23 (a)		661,366		663,271
Series 2019-3A, Class A, 2.590% 9/15/22 (a)		128,520		128,677
Series 2019-1A, Class B, 3.450% 2/15/23 (a)		227,452		228,020
Flagship Credit Auto Trust
Series 2016-4, Class C, 2.710% 11/15/22 (a)		247,588		248,633
Series 2018-2, Class A, 2.970% 10/17/22 (a)		340,201		341,444

MML Inflation-Protected and Income Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Hertz Fleet Lease Funding LP, Series 2018-1, Class A1, 1 mo. USD LIBOR + .500%
0.656% FRN 5/10/32 (a)	$	1,196,340	$	1,196,459
Hertz Vehicle Financing II LP
Series 2017-1A, Class B, 3.560% 10/25/21 (a)		2,530,000		2,508,827
Series 2019-2A, Class C, 4.260% 5/25/25 (a)		2,525,000		2,442,035
OneMain Direct Auto Receivables Trust
Series 2017-2A, Class C, 2.820% 7/15/24 (a)		6,459,490		6,464,132
Series 2018-1A, Class A, 3.430% 12/16/24 (a)		502,338		508,957
Series 2017-2A, Class E, 4.740% 11/14/25 (a)		968,000		968,092
OSCAR US Funding XI LLC, Series 2019-2A, Class A2
2.490% 8/10/22 (a)		678,440		683,025
Santander Drive Auto Receivables Trust, Series 2020-2, Class A2A
0.620% 5/15/23		4,674,000		4,679,850
Tesla Auto Lease Trust, Series 2018-B, Class A
3.710% 8/20/21 (a)		4,809,751		4,854,736
World Omni Auto Receivables Trust, Series 2019-C, Class A2B, 1 mo. USD LIBOR + .230%
0.382% FRN 2/15/23		4,403,494		4,406,131
				42,158,429
Commercial Mortgage-Backed Securities — 2.6%
BHMS Mortgage Trust, Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500%
1.652% FRN 7/15/35 (a)		1,700,000		1,576,794
BX Commercial Mortgage Trust
Series 2020-BXLP, Class E, 1 mo. USD LIBOR + 1.600% 1.752% FRN 12/15/36 (a)		1,298,811		1,283,474
Series 2018-IND, Class E, 1 mo. USD LIBOR + 1.700% 1.852% FRN 11/15/35 (a)		1,582,000		1,569,255
Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000% 2.152% FRN 10/15/36 (a)		1,661,271		1,641,658
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class D, 1 mo. USD LIBOR + 1.750%
1.902% FRN 12/15/37 (a)		308,865		302,014
DBJPM 17-C6 Mortgage Trust, Series 2017-C6, Class A1
1.907% 6/10/50		525,324		529,512
JP Morgan Chase Commercial Mortgage Securities Corp., Series 2018-LAQ, Class A, 1 mo. USD LIBOR + 1.000%
1.152% FRN 6/15/32 (a)		1,364,866		1,303,473
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800%
1.952% FRN 5/15/36 (a)		476,000		470,796
				8,676,976
Credit Card Asset-Backed Securities — 0.3%
Citibank Credit Card Issuance Trust, Series 2017-A6, Class A6, 1 mo. LIBOR + .770%
0.921% FRN 5/14/29		1,100,000		1,097,852
Home Equity Asset-Backed Securities — 0.1%
Asset Backed Securities Corp. Home Equity Loan Trust, Series 2006-HE3, Class A4, 1 mo. USD LIBOR + .170%
0.318% FRN 3/25/36		181,549		180,441

MML Inflation-Protected and Income Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Other Asset-Backed Securities — 20.1%
321 Henderson Receivables I LLC, Series 2006-1A, Class A1, 1 mo. USD LIBOR + .200%
0.352% FRN 3/15/41 (a)	$	216,155	$	212,654
Series 2006-2A, Class A1, 1 mo. USD LIBOR + .200%
0.352% FRN 6/15/41 (a)		1,014,003		980,587
321 Henderson Receivables LLC
Series 2006-3A, Class A1, 1 mo. USD LIBOR + .200% 0.352% FRN 9/15/41 (a)		117,161		114,942
Series 2006-4A, Class A1, 1 mo. USD LIBOR + .200% 0.352% FRN 12/15/41 (a)		130,157		128,649
Series 2007-1A, Class A1, 1 mo. USD LIBOR + .200% 0.352% FRN 3/15/42 (a)		542,194		523,572
AASET Trust
Series 2017-1A, Class A, 3.967% 5/16/42  (a)		159,224		143,949
Series 2018-2A, Class A, 4.454% 11/18/38 (a)		1,591,266		1,479,985
Affirm Asset Securitization Trust, Series 2020-Z1, Class A
3.460% 10/15/24 (a)		2,884,761		2,903,743
AIMCO CLO, Series 2015-AA, Class AR, 3 mo. USD LIBOR + .850%
1.125% FRN 1/15/28  (a)		2,328,639		2,314,005
Arbor Realty Commercial Real Estate Notes, Series 2018-FL1, Class A, 1 mo. USD LIBOR + 1.150%
1.302% FRN 6/15/28 (a)		780,000		770,274
Avant Loans Funding Trust
Series 2019-B, Class A, 2.720% 10/15/26 (a)		848,091		851,282
Series 2019-A, Class A, 3.480% 7/15/22 (a)		49,664		49,680
Avery Point IV CLO Ltd., Series 2014-1A, Class AR, 3 mo. USD LIBOR + 1.100%
1.345% FRN 4/25/26 (a)		481,146		480,772
BCC Funding XIV LLC, Series 2018-1A, Class A2
2.960% 6/20/23 (a)		116,391		116,516
Carlyle Global Market Strategies CLO Ltd., Series 2013-2A, Class AR, 3 mo. USD LIBOR + .890%
1.162% FRN 1/18/29 (a)		1,997,380		1,972,986
CCG Receivables Trust, Series 2018-2, Class A2
3.090% 12/15/25 (a)		367,942		368,694
Elara HGV Timeshare Issuer LLC, Series 2014-A, Class B,
3.020% VRN 2/25/27 (a) (b)		107,407		107,252
FCI Funding  LLC, Series 2019-1A, Class A
3.630% 2/18/31 (a)		192,341		195,701
First Franklin Mortgage Loan Trust, Series 2005-FF9, Class A4, 1 mo. USD LIBOR + .360%
0.508% FRN 10/25/35		1,236,863		1,212,743
KREF Ltd.
Series 2018-FL1, Class A, 1 mo. USD LIBOR + 1.100% 1.251% FRN 6/15/36 (a)		3,980,000		3,951,898
Series 2018-FL1, Class AS, 1 mo. USD LIBOR + 1.350% 1.501% FRN 6/15/36 (a)		2,000,000		1,981,436
Series 2018-FL1, Class D, 1 mo. USD LIBOR + 2.550% 2.701% FRN 6/15/36 (a)		2,450,000		2,353,717
LCM Ltd., Series 19A, Class AR, 3 mo. USD LIBOR + 1.240%
1.515% FRN 7/15/27 (a)		1,300,000		1,296,173
Lendmark Funding Trust, Series 2018-1A, Class A
3.810% 12/21/26 (a)		630,000		641,818
Marlette Funding Trust
Series 2019-4A, Class A, 2.390% 12/17/29 (a)		3,683,974		3,718,255
Series 2019-3A, Class A, 2.690% 9/17/29 (a)		2,321,822		2,342,104
Series 2019-2A, Class A, 3.130% 7/16/29 (a)		3,483,712		3,520,932

MML Inflation-Protected and Income Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2019-1A, Class A, 3.440% 4/16/29 (a)	$	5,139,459	$	5,191,512
Series 2019-2A, Class B, 3.530% 7/16/29 (a)		385,000		392,547
Series 2018-1A, Class C, 3.690% 3/15/28 (a)		3,010,145		3,019,986
Series 2018-3A, Class B, 3.860% 9/15/28 (a)		3,204,834		3,225,626
MVW Owner Trust, Series 2017-1A, Class A
2.420% 12/20/34 (a)		73,734		75,174
Neuberger Berman CLO XX Ltd., Series 2015-20A, Class AR, 3 mo. USD LIBOR + .800%
1.075% FRN 1/15/28 (a)		2,320,782		2,303,497
NP SPE II LLC, Series 2019-1A, Class A1
2.574% 9/20/49 (a)		345,659		343,255
OCP CLO Ltd., Series 2015-10A, Class A1R, 3 mo. USD LIBOR + .820%
1.065% FRN 10/26/27 (a)		1,660,390		1,649,619
Orange Lake Timeshare Trust, Series 2016-A, Class A
2.610% 3/08/29 (a)		174,645		175,004
Oxford Finance Funding Trust, Series 2016-1A, Class A
3.968% 6/17/24 (a)		61,089		61,113
PFS Financing Corp.
Series 2019-B, Class A, 1 mo. USD LIBOR + .550% 0.702% FRN 9/15/23 (a)		400,000		400,256
Series 2019-B, Class B, 1 mo. USD LIBOR + .800% 0.952% FRN 9/15/23 (a)		900,000		896,650
Planet Fitness Master Issuer LLC, Series 2018-1A, Class A2I
4.262% 9/05/48 (a)		2,352,000		2,351,050
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850%
2.998% FRN 2/25/23 (a)		440,000		429,446
Saxon Asset Securities Trust, Series 2006-2, Class A3C, 1 mo. USD LIBOR + .150%
0.298% FRN 9/25/36		1,303,420		1,290,675
SCF Equipment Leasing LLC, Series 2020-1A, Class A2
0.680% 10/20/25 (a)		1,579,000		1,581,913
Sierra Receivables Funding LLC
Series 2019-3A, Class C, 3.000% 8/20/36 (a)		2,261,656		2,229,222
Series 2015-3A, Class B, 3.080% 9/20/32 (a)		20,298		20,279
Series 2019-1A, Class C, 3.770% 1/20/36 (a)		494,619		496,623
Series 2019-3A, Class D, 4.180% 8/20/36 (a)		579,111		544,781
Series 2019-1A, Class D, 4.750% 1/20/36 (a)		447,513		432,047
SoFi Consumer Loan Program  Trust
Series 2017-4, Class A, 2.500% 5/26/26 (a)		240,815		242,469
Series 2017-6, Class A2, 2.820% 11/25/26 (a)		266,018		268,037
Series 2016-1A, Class A, 3.260% 8/25/25 (a)		241,619		243,506
Series 2017-2, Class A, 3.280% 2/25/26 (a)		56,084		56,057
SoFi Consumer Loan Program LLC, Series 2016-2A, Class B,
4.770% VRN 10/27/25 (a) (b)		1,924,674		1,936,085
Structured Asset Securities Corp. Mortgage Loan Trust, Series 2006-GEL1, Class M2, 1 mo. USD LIBOR + .800%
0.948% FRN 11/25/35 (a)		1,165,614		1,110,339
TLF National Tax Lien Trust, Series 2017-1A, Class A
3.090% 12/15/29 (a)		438,755		441,648
Trip Rail Master Funding LLC, Series 2017-1A, Class A1
2.709% 8/15/47 (a)		88,430		88,509
Verizon Owner Trust., Series 2018-1A, Class A1A
2.820% 9/20/22 (a)		822,587		828,564
Westgate Resorts LLC
Series 2017-1A, Class A, 3.050% 12/20/30 (a)		235,027		234,313

MML Inflation-Protected and Income Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2018-1A, Class A, 3.380% 12/20/31 (a)	$	350,008	$	347,708
				67,641,829
Student Loans Asset-Backed Securities — 14.1%
Brazos Higher Education Authority, Inc.
Series 2006-2, Class A10, 3 mo. USD LIBOR + .120% 0.345% FRN 6/25/26		947,470		935,195
Revenue Bonds, Series 2006-2, Class B2, 1.656% 6/25/42		1,200,000		1,143,768
Chase Education Loan Trust, Series 2007-A, Class A4, 3 mo. USD LIBOR + .100%
0.333% FRN 6/28/39		3,247,090		3,087,020
College Loan Corp. Trust I, Series 2005-2, Class B, 3 mo. USD LIBOR + .490%
0.765% FRN 1/15/37		414,274		372,107
Commonbond Student Loan Trust, Series 2018-CGS, Class C
4.350% 2/25/46 (a)		39,027		39,288
DRB Prime Student Loan Trust
Series 2016-R, Class A1, 1 mo. USD LIBOR + 1.900% 2.048% FRN 10/25/44 (a)		781,663		783,565
Series 2016-A, Class A1, 1 mo. USD LIBOR + 2.000% 2.148% FRN 4/25/40 (a)		173,115		171,273
Earnest Student Loan Program LLC, Series 2016-B, Class A1, 1 mo. USD LIBOR + 2.050%
2.198% FRN 2/26/35 (a)		133,993		126,401
ECMC Group Student Loan Trust
Series 2017-1A, Class A, 1 mo. USD LIBOR + 1.200% 1.348% FRN 12/27/66 (a)		1,323,486		1,316,159
Series 2016-1A, Class A, 1 mo. USD LIBOR + 1.350% 1.498% FRN 7/26/66 (a)		891,154		899,896
EdLinc Student Loan Funding Trust, Series 2017-A, Class A, PRIME - 1.150%
3.600% FRN 12/01/47 (a)		629,548		622,110
Edsouth Indenture
No.9 LLC, Series 2015-1, Class A, 1 mo. USD LIBOR + .800% 0.948% FRN 10/25/56 (a)		356,321		347,183
No.10 LLC, Series 2015-2, Class B, 1 mo. USD LIBOR + 1.500% 1.648% FRN 12/25/58 (a)		1,000,000		983,922
ELFI Graduate Loan Program LLC, Series 2018-A, Class A1, 1 mo. USD LIBOR + .750%
0.898% FRN 8/25/42 (a)		406,341		403,337
Goal Capital Funding Trust, Series 2010-1, Class A, 3 mo. USD LIBOR + .700%
0.950% FRN 8/25/48 (a)		247,778		243,161
JP Morgan Student Loan Trust, Series 2007-A, Class B, 3 mo. USD LIBOR + .350%
0.597% FRN 6/28/39 (a)		464,342		416,318
KeyCorp Student Loan Trust
Series 2000-A, Class A2, 3 mo. USD LIBOR + .320% 0.570% FRN 5/25/29		34,487		33,975
Series 2005-A, Class 2B, 3 mo. USD LIBOR + .730% 0.963% FRN 9/27/38		1,600,367		1,578,384
Laurel Road Prime Student Loan Trust, Series 2019-A, Class A1FX
2.340% 10/25/48 (a)		556,347		544,941
Navient Student Loan Trust
Series 2017-3A, Class A2, 1 mo. USD LIBOR + .600% 0.748% FRN 7/26/66 (a)		758,627		755,247
Series 2018-1A, Class A3, 1 mo. USD LIBOR + .720% 0.868% FRN 3/25/67 (a)		1,120,000		1,109,251
Series 2016-3A, Class A2, 1 mo. USD LIBOR + .850% 0.998% FRN 6/25/65 (a)		58,643		58,591

MML Inflation-Protected and Income Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2019-2A, Class A2, 1 mo. USD LIBOR + 1.000% 1.148% FRN 2/27/68 (a)	$	3,387,000	$	3,390,324
Series 2017-1A, Class A3, 1 mo. USD LIBOR + 1.150% 1.298% FRN 7/26/66 (a)		410,000		410,000
Series 2015-AA, Class A2B, 1 mo. USD LIBOR + 1.200% 1.352% FRN 12/15/28  (a)		334,696		335,356
Series 2016-5A, Class A, 1 mo. USD LIBOR + 1.250% 1.398% FRN 6/25/65 (a)		1,971,604		1,971,603
Series 2016-6A, Class A3, 1 mo. USD LIBOR + 1.300% 1.448% FRN 3/25/66 (a)		2,200,000		2,219,235
Series 2019-3A, Class B, 1 mo. USD LIBOR + 1.550% 1.698% FRN 7/25/68 (a)		2,900,000		2,554,351
Nelnet Private Education Loan Trust, Series 2016-A, Class A1A, 1 mo. USD LIBOR + 1.750%
1.898% FRN 12/26/40 (a)		247,858		236,752
Nelnet Student Loan Trust
Series 2005-2, Class B, 3 mo. USD LIBOR + .170% 0.395% FRN 3/23/37		854,830		729,007
Series 2006-2, Class B, 3 mo. USD LIBOR + .200% 0.445% FRN 1/25/38		643,394		549,271
Series 2006-3, Class B, 3 mo. USD LIBOR + .250% 0.475% FRN 6/25/41		303,665		262,711
Series 2004-3, Class B, 3 mo. USD LIBOR + .350% 0.595% FRN 10/25/40		1,028,313		967,833
Series 2014-2A, Class B, 1 mo. USD LIBOR + 1.500% 1.675% FRN 6/25/41 (a)		375,000		355,049
SLC Student Loan Trust
Series 2006-2, Class B, 3 mo. USD LIBOR + .230% 0.480% FRN 12/15/39		1,140,814		990,660
Series 2005-2, Class B, 3 mo. USD LIBOR + .280% 0.530% FRN 3/15/40		1,721,727		1,505,618
SLM Private Credit Student Loan Trust, Series 2004-B, Class B, 3 mo. USD LIBOR + .470%
0.720% FRN 9/15/33		464,578		463,575
SLM Student Loan Trust
Series 2005-5, Class A4, 3 mo. USD LIBOR + .140% 0.385% FRN 10/25/28		335,074		332,055
Series 2006-4, Class B, 3 mo. USD LIBOR + .200% 0.445% FRN 1/25/70		338,641		302,190
Series 2006-5, Class B, 3 mo. USD LIBOR + .210% 0.455% FRN 10/25/40		360,234		322,064
Series 2006-2, Class B, 3 mo. USD LIBOR + .220% 0.465% FRN 1/25/41		397,070		355,065
Series 2003-14, Class A6, 3 mo. USD LIBOR + .300% 0.545% FRN 7/25/25		233,572		228,226
Series 2005-8, Class B, 3 mo. USD LIBOR + .310% 0.555% FRN 1/25/55		358,713		318,908
Series 2004-8, Class B, 3 mo. USD LIBOR + .460% 0.705% FRN 1/25/40		396,506		357,528
Series 2004-3, Class B, 3 mo. USD LIBOR + .470% 0.715% FRN 10/25/64		275,194		244,410
Series 2003-14, Class A7, 3 mo. USD LIBOR + .600% 0.845% FRN 10/25/65 (a)		2,100,000		2,051,448
Series 2003-11, Class B, 3 mo. USD LIBOR + .650% 0.900% FRN 12/15/38		401,945		369,211
SMB Private Education Loan Trust
Series 2019-A, Class A1, 1 mo. USD LIBOR + .350% 0.502% FRN 2/16/26 (a)		212,255		209,882
Series 2019-B, Class A1, 1 mo. USD LIBOR + .350% 0.502% FRN 7/15/26 (a)		153,909		153,793
Series 2018-B, Class A2B, 1 mo. USD LIBOR + .720% 0.872% FRN 1/15/37 (a)		1,302,832		1,289,033
Series 2019-A, Class A2B, 1 mo. USD LIBOR + .870% 1.022% FRN 7/15/36 (a)		1,639,000		1,618,321
Series 2014-A, Class A2B, 1 mo. USD LIBOR + 1.150% 1.302% FRN 5/15/26 (a)		663,018		664,483
Series 2014-A, Class A2A, 3.050% 5/15/26 (a)		148,811		150,353
SoFi Alternative Trust, Series 2019-C, Class PT,
4.861% VRN 1/25/45 (a) (b)		1,610,413		1,731,194
SoFi Professional Loan Program LLC
Series 2017-A, Class A1, 1 mo. USD LIBOR + .700% 0.848% FRN 3/26/40 (a)		220,297		220,059

MML Inflation-Protected and Income Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2016-A, Class A1, 1 mo. USD LIBOR + 1.750% 1.898% FRN 8/25/36 (a)	$	206,180	$	207,656
Series 2019-C, Class A1FX, 2.130% 11/16/48 (a)		1,061,511		1,068,806
Series 2016-B, Class A2B, 2.740% 10/25/32 (a)		2,191,320		2,226,559
				47,333,681
Whole Loan Collateral Collateralized Mortgage Obligations — 9.1%
Angel Oak Mortgage Trust, Series 2018-3, Class A3,
3.238% VRN 5/25/59 (a) (b)		1,153,744		1,165,630
Banc of America Funding, Series 2006-G, Class 2A1, 1 mo. USD LIBOR + .440%
0.596% FRN 7/20/36		1,169,119		1,159,385
BRAVO Residential Funding Trust, Series 2019-NQM1, Class A1,
2.666% VRN 7/25/59 (a) (b)		6,626,095		6,726,920
CIM Trust, Series 2019-INV3, Class A11, 1 mo. USD LIBOR + 1.000%
1.125% FRN 8/25/49 (a)		3,255,113		3,254,985
Citigroup Mortgage Loan Trust, Series 2019-IMC1, Class A3,
3.030% VRN 7/25/49 (a) (b)		976,492		973,447
Deephaven Residential Mortgage Trust
Series 2018-1A, Class A1, 2.976% VRN 12/25/57 (a) (b)		259,239		260,856
Series 2018-1A, Class A2, 3.027% VRN 12/25/57 (a) (b)		259,239		260,991
Series 2018-2A, Class A1, 3.479% VRN 4/25/58 (a) (b)		863,812		873,761
Series 2019-1A, Class A3, 3.948% VRN 1/25/59 (a) (b)		182,923		184,932
Series 2018-4A, Class A3, 4.285% VRN 10/25/58 (a) (b)		1,284,010		1,296,900
JP Morgan Mortgage Trust
Series 2018-1, Class A5, 3.500% VRN 6/25/48 (a) (b)		251,440		251,939
Series 2018-3, Class A5, 3.500% VRN 9/25/48 (a) (b)		460,642		463,826
Series 2017-6, Class A5, 3.500% VRN 12/25/48 (a) (b)		313,270		316,972
New Residential Mortgage Loan Trust, Series 2019-NQM1, Class A3,
3.928% VRN 1/25/49 (a) (b)		866,104		881,058
Onslow Bay Financial LLC, Series 2020-EXP1, Class 2A2, 1 mo. USD LIBOR + .950%
1.098% FRN 2/25/60 (a)		1,621,699		1,624,272
Opteum Mortgage Acceptance Corp. Asset Backed Pass-Through Certificates, Series 2005-4, Class 1APT, 1 mo. USD LIBOR + .310%
0.458% FRN 11/25/35		970,575		935,861
PSMC Trust, Series 2018-1, Class A3,
3.500% VRN 2/25/48 (a) (b)		324,511		327,994
Sequoia Mortgage Trust
Series 2018-3, Class A4, 3.500% VRN 3/25/48 (a) (b)		358,028		359,092
Series 2018-CH1, Class A10, 4.000% VRN 2/25/48 (a) (b)		223,333		225,126
Series 2018-CH2, Class A12, 4.000% VRN 6/25/48 (a) (b)		752,314		761,322
Series 2018-CH3, Class A11, 4.000% VRN 8/25/48 (a) (b)		159,570		160,432
Starwood Mortgage Residential Trust, Series 2019-INV1, Class A3,
2.916% VRN 9/27/49 (a) (b)		919,707		932,072
Verus Securitization Trust
Series 2019-INV2, Class A3, 3.219% VRN 7/25/59 (a) (b)		894,965		914,165
Series 2019-1, Class A1, 3.836% VRN 2/25/59 (a) (b)		1,848,279		1,869,457
Series 2019-1, Class A3, 4.040% VRN 2/25/59 (a) (b)		4,257,297		4,316,726
				30,498,121
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $209,976,780)				209,567,714

MML Inflation-Protected and Income Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
U.S. Government Agency Obligations and Instrumentalities — 4.6%
Pass-Through Securities — 0.1%
Federal Home Loan Mortgage Corp.      Pool #1Q0239, 1 year CMT + 2.211% 3.823% 3/01/37	$	172,609	$	181,891
Whole Loans — 4.5%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes
Series 2020-DNA3, Class M1, 1 mo. USD LIBOR + 1.500% 1.648% FRN 6/25/50 (a)		9,600,000		9,616,151
Series 2020-DNA4, Class M1, 1 mo. USD LIBOR + 1.500% 1.648% FRN 8/25/50 (a)		5,040,000		5,055,288
Federal National Mortgage Association Connecticut Avenue Securities Trust, Series 2019-R03, Class 1M2, 1 mo. USD LIBOR + 2.150%
2.298% FRN 9/25/31 (a)		670,903		669,138
				15,340,577
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $15,490,335)				15,522,468
U.S. Treasury Obligations — 22.0%
U.S. Treasury Bonds & Notes — 22.0%
U.S. Treasury Inflation Index
0.125% 10/15/24		6,260,202		6,645,229
0.125% 4/15/25		601,758		640,457
0.125% 7/15/26		2,215,538		2,403,425
0.125% 1/15/30		4,732,383		5,231,501
0.125% 7/15/30		1,919,760		2,135,533
0.250% 1/15/25		5,249,952		5,602,068
0.250% 7/15/29		3,899,126		4,362,706
0.250% 2/15/50		2,216,786		2,620,195
0.375% 7/15/25 (c)		1,988,186		2,158,735
0.375% 7/15/27		52,952		58,881
0.500% 4/15/24		2,773,332		2,944,679
0.500% 1/15/28		1,339,056		1,503,143
0.625% 4/15/23		3,076,673		3,219,209
0.625% 1/15/24		2,109,494		2,241,832
0.625% 1/15/26		2,425,829		2,674,428
0.625% 2/15/43		1,690,155		2,085,493
0.750% 7/15/28		2,244,665		2,586,684
0.750% 2/15/45		1,925,210		2,454,342
0.875% 1/15/29		2,051,920		2,390,888
0.875% 2/15/47		965,862		1,286,797
1.000% 2/15/48		1,575,723		2,176,714
1.375% 2/15/44		1,889,635		2,691,869
2.125% 2/15/41		1,301,256		2,023,555
2.375% 1/15/25		2,817,377		3,271,403
3.375% 4/15/32		364,870		554,225
3.625% 4/15/28		1,521,606		2,087,066

MML Inflation-Protected and Income Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3.875% 4/15/29	$	4,097,184	$	5,892,103
				73,943,160
TOTAL U.S. TREASURY OBLIGATIONS (Cost $69,215,388)				73,943,160
TOTAL BONDS & NOTES (Cost $294,707,294)				299,058,153
TOTAL PURCHASED OPTIONS (#) — 0.4% (Cost $1,845,236)				1,192,932
TOTAL LONG-TERM INVESTMENTS (Cost $296,552,530)				300,251,085
Short-Term Investments — 10.5%
Commercial Paper — 8.9%
Avangrid, Inc.
0.254% 10/20/20 (a)		1,000,000		999,898
BP Capital Markets PLC
1.274% 11/02/20 (a)		3,000,000		2,999,667
Carnival Corp.
1.746% 11/25/20 (a)		4,000,000		3,975,690
1.902% 11/25/20 (a)		2,000,000		1,987,845
Dominion Resources, Inc.
0.203%, 10/13/20		1,000,000		999,937
0.335%, 11/03/20		3,000,000		2,999,453
Duke Energy Corp.
0.223% 1/05/21 (a)		2,000,000		1,998,712
Harley-Davidson Funding Corp.
0.304% 10/19/20 (a)		3,000,000		2,999,669
NRW Bank
0.183% 12/08/20 (a)		1,000,000		999,707
Nutrien Ltd.
0.223% 12/17/20 (a)		4,000,000		3,998,076
Schlumberger Holdings Corp.
0.254% 1/11/21 (a)		1,000,000		999,671
Societe Generale SA
0.081% 10/06/20 (a)		1,000,000		999,983
Suncor Energy, Inc.
0.254% 12/07/20 (a)		4,000,000		3,998,376
				29,956,684
Repurchase Agreement — 0.7%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/20, 0.000%, due 10/01/20 (d)		2,321,040		2,321,040
U.S. Treasury Bill — 0.9%
U.S. Treasury Bill
0.000% 10/06/20		3,000,000		2,999,972
TOTAL SHORT-TERM INVESTMENTS (Cost $35,294,112)				35,277,696
TOTAL INVESTMENTS — 99.9% (Cost $331,846,642) (e)				335,528,781
Other Assets/(Liabilities) — 0.1%				323,397
NET ASSETS — 100.0%			$	335,852,178

MML Inflation-Protected and Income Fund —  Portfolio of Investments (Continued)

Abbreviation Legend

CLO	Collateralized Loan Obligation
FRN	Floating Rate Note
VRN	Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At September 30, 2020, the aggregate market value of these securities amounted to $213,039,561 or 63.43% of net assets.
(b)	Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions.  These securities do not indicate a reference rate and spread in their description above. The rates shown are the current interest rates at September 30, 2020.
(c)	A portion of this security is pledged/held as collateral for open derivatives.
(d)	Maturity value of $2,321,040. Collateralized by U.S. Government Agency obligations with a rate of 2.375%, maturity date of 3/15/22, and an aggregate market value, including accrued interest, of $2,367,539.
(e)	See Note 3 for aggregate cost for federal tax purposes.

(#) Interest Rate Swaptions Purchased
			Paid by Fund		Received by Fund
Description	Counterparty	Expiration Date	Rate	Frequency	Rate	Frequency	Notional Amount		Value		Premium Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	3-Month USD LIBOR BBA	Quarterly	2.44%	Semi-Annually	USD	1,967,000	$	249,612	$	98,335	$	151,277
Put
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	2.94%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	USD	22,880,000	$	631,717	$	1,143,840	$	(512,123	)
10-Year Interest Rate Swap, 2/02/43	Credit Suisse International	1/31/33	3.11%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	USD	12,590,000		311,603		603,061		(291,458	)
										943,320		1,746,901		(803,581	)
									$	1,192,932	$	1,845,236	$	(652,304	)

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount			Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Long Bond	12/21/20		36	$	6,355,798		$	(9,673	)
U.S. Treasury Note 2 Year	12/31/20		2		441,897			25
U.S. Treasury Note 5 Year	12/31/20		48		6,048,199			1,301
							$	(8,347	)
Short
U.S. Treasury Ultra 10 Year	12/21/20		34	$	(5,423,486	)	$	(13,858	)
U.S. Treasury Ultra Bond	12/21/20		16		(3,591,369	)		42,369
							$	28,511

MML Inflation-Protected and Income Fund —  Portfolio of Investments (Continued)

Centrally Cleared Credit Default Swaps - Buy Protection
Reference Obligation/Index	Rate Paid by Fund	Payment Frequency	Termination Date	Notional Amount		Value			Upfront Premium Paid/ (Received)			Unrealized Appreciation (Depreciation)
CDX.NA.IG Series 35†	1.00%	Quarterly	12/20/2025	USD	1,800,000	$	(37,514	)	$	(44,103	)	$	6,589

OTC Interest Rate Swaps
Paid by the Fund		Received by the Fund
Rate/ Reference	Frequency	Rate/ Reference	Frequency	Counterparty	Termination Date	Notional Amount		Value			Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
1.833%	Maturity	U.S. Consumer Price Index	Maturity	Goldman Sachs & Co.	8/28/23	USD	3,000,000	$	(3,500	)	$	—	$	(3,500	)
1.880%	Maturity	U.S. Consumer Price Index	Maturity	Goldman Sachs & Co.	8/28/25	USD	2,000,000		(3,660	)		—		(3,660	)
1.643%	Maturity	U.S. Consumer Price Index	Maturity	Goldman Sachs International	12/09/21	USD	11,000,000		(77,658	)		—		(77,658	)
1.180%	Maturity	U.S. Consumer Price Index	Maturity	Goldman Sachs International	6/22/22	USD	3,000,000		34,335			—		34,335
1.669%	Maturity	U.S. Consumer Price Index	Maturity	Goldman Sachs International	11/08/22	USD	1,920,000		(15,200	)		—		(15,200	)
								$	(65,683	)	$	—	$	(65,683	)

OTC Total Return Swaps
Paid by the Fund				Received by the Fund
Rate/ Reference	No. of Contracts/ Notional		Frequency		Rate/ Reference	No. of Contracts/ Notional	Frequency	Counterparty	Termination Date	Value			Upfront Premium Received (Paid)/ Received		Unrealized Appreciation (Depreciation)
0.29%	USD	42,656,014	Maturity		Bloomberg Barclays US Treasury Inflation Notes TR Index	123,929	Maturity	BNP Paribas SA	1/29/21	$	306,525		$	—	$	306,525
0.30%	USD	64,794,997	Maturity		Bloomberg Barclays US Treasury Inflation Notes TR Index	186,216	Maturity	BNP Paribas SA	2/26/21		(239,621	)		—		(239,621	)
0.31%	USD	32,000,000	Maturity		Bloomberg Barclays US Treasury Inflation Notes TR Index	96,168	Maturity	Goldman Sachs International	10/30/20		1,338,554			—		1,338,554
0.29%	USD	53,814,689	Maturity		Bloomberg Barclays US Treasury Inflation Notes TR Index	156,349	Maturity	Goldman Sachs International	1/29/21		386,715			—		386,715
0.30%	USD	53,995,831	Maturity		Bloomberg Barclays US Treasury Inflation Notes TR Index	155,180	Maturity	Goldman Sachs International	2/26/21		(199,684	)		—		(199,684	)
										$	1,592,489		$	—	$	1,592,489

† Payment is based on a percentage of the index. Reference entities are a number of individual issuers comprising the index.

Currency Legend 

USD U.S. Dollar

MML Managed Bond Fund —  Portfolio of Investments

September 30, 2020 (Unaudited)

	Number of Shares		Value
Equities — 0.2%
Preferred Stock — 0.2%
Financial — 0.2%
Insurance — 0.2%
Allstate Corp., 3 mo. USD LIBOR + 3.165% 5.100% VRN 1/15/53		95,000	$	2,467,150
TOTAL PREFERRED STOCK (Cost $2,375,000)				2,467,150
TOTAL EQUITIES (Cost $2,375,000)				2,467,150

	Principal Amount
Bonds & Notes — 98.4%
Corporate Debt — 40.0%
Aerospace & Defense — 0.2%
BAE Systems PLC 1.900% 2/15/31 (a)	$	595,000	592,274
Raytheon Technologies Corp. 4.500% 6/01/42		1,000,000	1,262,526
			1,854,800
Agriculture — 1.0%
BAT Capital Corp. 2.259% 3/25/28		725,000	728,597
4.700% 4/02/27		1,050,000	1,204,592
4.758% 9/06/49		540,000	586,469
Bunge Ltd. Finance Corp. 1.630% 8/17/25		385,000	386,684
3.250% 8/15/26		1,179,000	1,271,374
4.350% 3/15/24		1,810,000	1,994,441
Imperial Brands Finance PLC 3.875% 7/26/29 (a)		2,764,000	2,993,921
Reynolds American, Inc. 5.850% 8/15/45		985,000	1,196,917
			10,362,995
Airlines — 0.3%
American Airlines Pass-Through Trust, Series 2014-1, Class B, 4.375% 4/01/24		140,132	99,245
Delta Air Lines, Inc. / SkyMiles IP Ltd. 4.500% 10/20/25 (a)		980,000	1,006,315
Spirit Airlines Pass-Through Trust, Series 2015-1, Class A, 4.100% 10/01/29		1,431,516	1,284,875

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
United Airlines Pass-Through Trust, Series 2018-1, Class B, 4.600% 9/01/27	$	465,264	$	360,777
				2,751,212
Auto Manufacturers — 1.7%
Ford Motor Credit Co. LLC 3.087% 1/09/23		1,410,000		1,381,645
4.140% 2/15/23		2,760,000		2,777,167
General Motors Co. 4.200% 10/01/27		565,000		605,520
5.150% 4/01/38		800,000		849,574
General Motors Financial Co., Inc. 3.500% 11/07/24		2,100,000		2,206,149
4.150% 6/19/23		2,193,000		2,327,913
4.200% 11/06/21		1,216,000		1,255,088
Hyundai Capital America 2.850% 11/01/22 (a)		1,705,000		1,763,175
3.000% 2/10/27 (a)		4,225,000		4,365,570
				17,531,801
Banks — 5.7%
ABN AMRO Bank NV 4.750% 7/28/25 (a)		310,000		349,091
Associated Banc-Corp. 4.250% 1/15/25		2,411,000		2,568,832
Bank of America Corp. SOFR + 2.150% 2.592% VRN 4/29/31		1,255,000		1,335,221
4.183% 11/25/27		1,090,000		1,248,832
3 mo. USD LIBOR + 1.814% 4.244% VRN 4/24/38		1,150,000		1,401,404
3 mo. USD LIBOR + 1.310% 4.271% VRN 7/23/29		475,000		557,204
6.110% 1/29/37		1,550,000		2,188,062
7.750% 5/14/38		400,000		662,475
The Bank of Nova Scotia 4.500% 12/16/25		795,000		920,915
3 mo. USD LIBOR + 2.648% 4.650% VRN (b)		3,575,000		3,465,533
Barclays Bank PLC 10.179% 6/12/21 (a)		3,351,000		3,525,617
Barclays PLC 3 mo. USD LIBOR + 1.380% 1.660% FRN 5/16/24		2,085,000		2,090,679
4.337% 1/10/28		1,720,000		1,915,323
BPCE SA 1.652% 10/06/26 (a) (c)		3,635,000		3,640,844
Citigroup, Inc. 4.125% 7/25/28		1,725,000		1,986,878
4.450% 9/29/27		450,000		521,817
6.625% 6/15/32		375,000		523,924
Credit Suisse AG 6.500% 8/08/23 (a)		3,069,000		3,475,642
Deutsche Bank AG 3.150% 1/22/21		1,998,000		2,010,088
Discover Bank 5 year USD Swap + 1.730% 4.682% VRN 8/09/28		2,905,000		3,045,428
First Republic Bank 4.375% 8/01/46		3,210,000		3,888,295
Fulton Financial Corp. 3.600% 3/16/22		1,565,000		1,599,513
The Goldman Sachs Group, Inc.

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
4.250% 10/21/25	$	550,000	$	625,736
5.950% 1/15/27		1,410,000		1,735,001
6.750% 10/01/37		1,145,000		1,663,603
HSBC Holdings PLC 4.250% 3/14/24		1,225,000		1,313,646
4.250% 8/18/25		1,512,000		1,643,199
JP Morgan Chase & Co. SOFR + 2.515% 2.956% VRN 5/13/31		990,000		1,062,175
5.600% 7/15/41		1,125,000		1,649,805
Morgan Stanley 4.350% 9/08/26		3,200,000		3,704,003
Valley National Bancorp 5.125% 9/27/23		1,530,000		1,639,389
Wells Fargo & Co. 5.375% 11/02/43		909,000		1,203,290
				59,161,464
Beverages — 0.6%
Anheuser-Busch Cos. LLC/Anheuser-Busch InBev Worldwide, Inc. 4.900% 2/01/46		3,475,000		4,284,777
Bacardi Ltd. 5.150% 5/15/38 (a)		450,000		548,776
Molson Coors Beverage Co. 4.200% 7/15/46		1,124,000		1,185,640
5.000% 5/01/42		360,000		407,720
				6,426,913
Chemicals — 1.0%
DuPont de Nemours, Inc. 5.319% 11/15/38		1,750,000		2,220,676
Huntsman International LLC 5.125% 11/15/22		1,000,000		1,075,298
Nutrition & Biosciences, Inc. 1.832% 10/15/27 (a)		755,000		758,423
Syngenta Finance NV 4.441% 4/24/23 (a)		2,065,000		2,180,931
Yara International ASA 3.148% 6/04/30 (a)		295,000		315,676
4.750% 6/01/28 (a)		3,328,000		3,899,811
				10,450,815
Commercial Services — 0.1%
ERAC USA Finance LLC 6.700% 6/01/34 (a)		125,000		172,648
PayPal Holdings, Inc. 3.250% 6/01/50		695,000		768,818
				941,466
Computers — 0.9%
Apple, Inc. 2.650% 5/11/50		700,000		733,518
Dell International LLC/EMC Corp. 6.020% 6/15/26 (a)		2,702,000		3,172,633
Genpact Luxembourg Sarl 3.375% 12/01/24		2,660,000		2,785,523
3.700% STEP 4/01/22		2,400,000		2,456,983

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Leidos, Inc. 4.375% 5/15/30 (a)	$	575,000	$	673,871
				9,822,528
Diversified Financial Services — 3.3%
AerCap Ireland Capital DAC / AerCap Global Aviation Trust 4.500% 9/15/23		1,370,000		1,411,855
AerCap Ireland Capital DAC/AerCap Global Aviation Trust 6.500% 7/15/25		645,000		696,320
Aircastle Ltd. 4.400% 9/25/23		3,095,000		3,061,729
5.000% 4/01/23		1,750,000		1,753,943
Antares Holdings LP 6.000% 8/15/23 (a)		2,945,000		2,978,152
8.500% 5/18/25 (a)		720,000		759,324
Ares Finance Co. LLC 4.000% 10/08/24 (a)		2,080,000		2,223,481
Avolon Holdings Funding Ltd. 3.250% 2/15/27 (a)		1,365,000		1,217,759
Brookfield Finance, Inc. 4.350% 4/15/30		2,825,000		3,298,015
4.850% 3/29/29		1,752,000		2,090,352
GE Capital International Funding Co. Unlimited Co. 4.418% 11/15/35		335,000		353,612
Global Aircraft Leasing Co. Ltd. 6.500% 9/15/24 (a)		1,398,937		779,907
Lazard Group LLC 3.625% 3/01/27		1,253,000		1,353,346
3.750% 2/13/25		800,000		867,172
4.500% 9/19/28		755,000		873,386
LeasePlan Corp. NV 2.875% 10/24/24 (a)		1,535,000		1,584,146
Legg Mason, Inc. 5.625% 1/15/44		1,195,000		1,654,600
Park Aerospace Holdings Ltd. 4.500% 3/15/23 (a)		1,550,000		1,535,971
5.250% 8/15/22 (a)		5,055,000		5,075,450
5.500% 2/15/24 (a)		545,000		549,155
				34,117,675
Electric — 1.2%
Appalachian Power Co. 4.500% 3/01/49		1,250,000		1,562,679
CMS Energy Corp. 4.875% 3/01/44		780,000		1,021,222
Entergy Arkansas LLC 2.650% 6/15/51		1,765,000		1,781,240
Entergy Louisiana LLC 4.950% 1/15/45		1,005,000		1,105,999
Infraestructura Energetica Nova SAB de CV 3.750% 1/14/28 (a)		820,000		811,800
ITC Holdings Corp. 2.950% 5/14/30 (a)		895,000		962,428
Nevada Power Co.  6.650% 4/01/36		550,000		812,511
Oncor Electric Delivery Co. 7.500% 9/01/38		495,000		815,771

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pacific Gas and Electric Co. 2.500% 2/01/31	$	775,000	$	737,389
Potomac Electric Power Co. 4.150% 3/15/43		700,000		846,996
Xcel Energy, Inc. 6.500% 7/01/36		1,250,000		1,832,624
				12,290,659
Foods — 0.3%
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc. 5.500% 1/15/30 (a)		776,000		844,653
Kraft Heinz Foods Co. 3.950% 7/15/25		616,000		668,390
Mars, Inc. 3.950% 4/01/49 (a)		660,000		798,983
Smithfield Foods, Inc. 3.000% 10/15/30 (a)		943,000		945,037
				3,257,063
Forest Products & Paper — 0.1%
Fibria Overseas Finance Ltd. 4.000% 1/14/25		1,250,000		1,325,000
Gas — 0.4%
CenterPoint Energy Resources Corp. 6.625% 11/01/37		1,250,000		1,793,018
NiSource, Inc. 4.800% 2/15/44		1,035,000		1,293,507
5.800% 2/01/42		950,000		1,291,512
				4,378,037
Health Care – Products — 0.1%
Dentsply Sirona, Inc. 3.250% 6/01/30		600,000		652,309
Health Care – Services — 0.3%
City of Hope 4.378% 8/15/48		1,050,000		1,277,470
Humana, Inc. 4.800% 3/15/47		830,000		1,086,563
UnitedHealth Group, Inc. 3.125% 5/15/60		845,000		906,882
				3,270,915
Insurance — 5.7%
Allstate Corp. 3 mo. USD LIBOR + 2.938% 5.750% VRN 8/15/53		4,260,000		4,435,827
American International Group, Inc. 3.400% 6/30/30		745,000		824,986
4.200% 4/01/28		1,025,000		1,188,694
4.500% 7/16/44		725,000		845,753
4.750% 4/01/48		505,000		618,705
3 mo. USD LIBOR + 2.868% 5.750% VRN 4/01/48		2,860,000		3,123,952
AmTrust Financial Services, Inc. 6.125% 8/15/23		3,370,000		3,124,659

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Arch Capital Group US, Inc.
5.144% 11/01/43	$	540,000	$	687,035
Athene Global Funding 2.500% 1/14/25 (a)		2,780,000		2,865,524
Athene Holding Ltd. 4.125% 1/12/28		5,728,000		6,220,088
6.150% 4/03/30		200,000		237,505
AXIS Specialty Finance LLC 3.900% 7/15/29		1,110,000		1,213,182
5 year CMT + 3.186% 4.900% VRN 1/15/40		1,315,000		1,313,753
AXIS Specialty Finance PLC
4.000% 12/06/27		2,500,000		2,736,529
Brighthouse Financial, Inc. 3.700% 6/22/27		1,175,000		1,218,901
4.700% 6/22/47		1,125,000		1,082,697
5.625% 5/15/30		1,055,000		1,228,616
Brown & Brown, Inc. 2.375% 3/15/31		600,000		603,690
4.200% 9/15/24		1,132,000		1,249,173
CNO Financial Group, Inc.
5.250% 5/30/25		2,621,000		3,006,193
Enstar Group Ltd. 4.500% 3/10/22		920,000		958,502
4.950% 6/01/29		1,600,000		1,792,891
Equitable Holdings, Inc.
5.000% 4/20/48		900,000		1,063,827
Markel Corp.
3.350% 9/17/29		585,000		645,907
New York Life Insurance Co.
3.750% 5/15/50 (a)		510,000		574,985
The Progressive Corp. 3 mo. USD LIBOR + 2.539% 5.375% VRN (b)		1,625,000		1,625,000
Prudential Financial, Inc. 5 year CMT + 3.035% 3.700% VRN 10/01/50		460,000		469,338
3 mo. USD LIBOR + 3.920% 5.625% VRN 6/15/43		1,025,000		1,088,730
3 mo. USD LIBOR + 2.665% 5.700% VRN 9/15/48		2,440,000		2,758,543
3 mo. USD LIBOR + 4.175% 5.875% VRN 9/15/42		550,000		579,265
Reinsurance Group of America, Inc.
3.150% 6/15/30		1,160,000		1,262,935
Teachers Insurance & Annuity Association of America
4.270% 5/15/47 (a)		750,000		878,114
USF&G Capital I
8.500% 12/15/45 (a)		885,000		1,390,803
Voya Financial, Inc. 3 mo. USD LIBOR + 2.084%
4.700% VRN 1/23/48		1,080,000		1,081,013
Willis North America, Inc. 2.950% 9/15/29		905,000		975,209
4.500% 9/15/28		1,965,000		2,336,406
XLIT Ltd. 4.450% 3/31/25		2,250,000		2,544,654
				59,851,584
Internet — 0.2%
Alphabet, Inc. 2.250% 8/15/60		820,000		775,374

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Amazon.com, Inc.
4.050% 8/22/47	$	775,000	$	1,006,886
				1,782,260
Investment Companies — 1.3%
Ares Capital Corp. 3.500% 2/10/23		2,600,000		2,670,648
4.200% 6/10/24		1,450,000		1,510,462
BlackRock TCP Capital Corp. 3.900% 8/23/24		2,910,000		2,956,618
4.125% 8/11/22		2,870,000		2,910,846
Sixth Street Specialty Lending, Inc. 3.875% 11/01/24		3,575,000		3,621,657
				13,670,231
Iron & Steel — 0.2%
Vale Overseas Ltd. 6.250% 8/10/26		1,250,000		1,478,125
6.875% 11/21/36		630,000		820,065
				2,298,190
Machinery – Diversified — 0.3%
CNH Industrial Capital LLC 1.950% 7/02/23		560,000		570,499
3.875% 10/15/21		2,280,000		2,342,042
				2,912,541
Media — 1.4%
Charter Communications Operating LLC/Charter Communications Operating Capital
6.484% 10/23/45		735,000		985,821
Comcast Corp. 3.450% 2/01/50		1,340,000		1,513,743
3.969% 11/01/47		630,000		753,094
4.750% 3/01/44		880,000		1,159,427
6.950% 8/15/37		265,000		419,479
Discovery Communications LLC 3.950% 3/20/28		1,052,000		1,196,754
4.000% 9/15/55 (a)		1,210,000		1,228,519
4.650% 5/15/50		490,000		561,694
Grupo Televisa SAB 6.625% 3/18/25		2,196,000		2,644,808
Time Warner Cable, Inc.
6.750% 6/15/39		985,000		1,332,030
ViacomCBS, Inc. 4.200% 5/19/32		1,220,000		1,396,114
The Walt Disney Co.
3.600% 1/13/51		1,515,000		1,707,264
				14,898,747
Mining — 0.9%
Glencore Finance Canada Ltd. 5.550% STEP 10/25/42 (a)		894,000		1,047,983
Glencore Funding LLC
3.875% 10/27/27 (a)		975,000		1,063,120

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
4.000% 4/16/25 (a)	$	2,150,000	$	2,359,818
4.625% 4/29/24 (a)		3,065,000		3,376,562
Kinross Gold Corp. 4.500% 7/15/27		470,000		533,070
Teck Resources Ltd. 6.000% 8/15/40		850,000		962,518
				9,343,071
Miscellaneous - Manufacturing — 0.2%
Carlisle Cos., Inc. 2.750% 3/01/30		1,353,000		1,438,188
General Electric Co. 4.125% 10/09/42		113,000		114,327
6.875% 1/10/39		298,000		382,809
				1,935,324
Oil & Gas — 2.4%
BP Capital Markets PLC 5 year CMT + 4.036% 4.375% VRN (b)		1,500,000		1,563,750
Cenovus Energy, Inc. 4.250% 4/15/27		1,125,000		1,017,090
6.750% 11/15/39		765,000		769,092
Devon Energy Corp. 5.850% 12/15/25		1,510,000		1,692,252
Diamondback Energy, Inc. 3.250% 12/01/26		1,105,000		1,108,640
EQT Corp. 3.900% 10/01/27		4,510,000		4,152,019
7.875% STEP 2/01/25		1,725,000		1,912,076
Marathon Petroleum Corp. 4.500% 4/01/48		510,000		516,861
6.500% 3/01/41		1,120,000		1,365,410
Newfield Exploration Co. 5.375% 1/01/26		1,650,000		1,549,565
5.625% 7/01/24		975,000		945,799
5.750% 1/30/22		1,904,000		1,903,177
Occidental Petroleum Corp. 6.600% 3/15/46		1,258,000		1,083,453
Ovintiv, Inc.
6.500% 2/01/38		545,000		494,933
Patterson-UTI Energy, Inc. 3.950% 2/01/28		1,680,000		1,298,460
Petroleos Mexicanos
5.350% 2/12/28		665,000		575,225
6.375% 1/23/45		595,000		456,068
6.500% 3/13/27		585,000		548,163
6.625% 6/15/35		140,000		116,262
Saudi Arabian Oil Co.
4.250% 4/16/39 (a)		2,075,000		2,385,183
				25,453,478
Oil & Gas Services — 0.3%
National Oilwell Varco, Inc. 3.600% 12/01/29		1,570,000		1,524,895

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3.950% 12/01/42	$	1,506,000	$	1,354,236
				2,879,131
Packaging & Containers — 0.3%
Amcor Finance USA, Inc. 3.625% 4/28/26		2,230,000		2,484,153
WRKCo, Inc. 3.000% 6/15/33		655,000		712,505
				3,196,658
Pharmaceuticals — 1.6%
AbbVie, Inc. 4.050% 11/21/39 (a)		1,045,000		1,201,706
4.700% 5/14/45		1,260,000		1,551,439
Bristol-Myers Squibb Co. 4.350% 11/15/47		830,000		1,096,192
Cigna Corp. 4.800% 7/15/46 (a)		880,000		1,102,696
CVS Health Corp. 4.300% 3/25/28		425,000		497,450
5.050% 3/25/48		455,000		580,766
6.125% 9/15/39		560,000		778,116
CVS Pass-Through Trust 5.926% 1/10/34 (a)		1,048,962		1,213,960
7.507% 1/10/32 (a)		895,812		1,118,664
McKesson Corp. 6.000% 3/01/41		550,000		749,359
Mylan NV 3.950% 6/15/26		2,230,000		2,508,817
5.250% 6/15/46		1,375,000		1,706,518
Takeda Pharmaceutical Co. Ltd. 3.375% 7/09/60		970,000		1,021,837
Teva Pharmaceutical Finance Netherlands III BV 2.200% 7/21/21		724,000		717,122
Upjohn, Inc. 2.700% 6/22/30 (a)		1,235,000		1,278,671
				17,123,313
Pipelines — 2.0%
Energy Transfer Operating LP 4.200% 4/15/27		1,085,000		1,122,594
5.875% 1/15/24		1,150,000		1,266,136
6.125% 12/15/45		1,000,000		1,003,791
3 mo. USD LIBOR + 4.028% 6.250% VRN   (b)		2,370,000		1,546,425
EnLink Midstream Partners LP 4.150% 6/01/25		2,924,000		2,517,652
4.850% 7/15/26		951,000		822,720
Enterprise Products Operating LLC 3 mo. USD LIBOR + 3.033% 5.250% VRN 8/16/77		1,775,000		1,690,244
3 mo. USD LIBOR + 2.570% 5.375% VRN 2/15/78		1,205,000		1,072,450
EQM Midstream Partners LP 4.750% 7/15/23		2,325,000		2,320,466
MPLX LP 4.500% 4/15/38		595,000		609,130
6.250% 10/15/22		652,000		652,708
3 mo. USD LIBOR + 4.652% 6.875% VRN   (b)		1,775,000		1,453,521

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Plains All American Pipeline LP 3 mo. USD LIBOR + 4.110% 6.125% VRN (b)	$	2,345,000	$	1,487,668
Plains All American Pipeline LP/PAA Finance Corp. 3.800% 9/15/30		1,150,000		1,115,134
4.500% 12/15/26		617,000		656,022
4.700% 6/15/44		1,195,000		1,059,543
6.650% 1/15/37		375,000		410,338
Sunoco Logistics Partners Operations LP 5.300% 4/01/44		525,000		489,137
				21,295,679
Private Equity — 0.7%
Apollo Management Holdings LP 5 year CMT + 3.266% 4.950% VRN 1/14/50 (a)		805,000		804,696
Carlyle Finance Subsidiary LLC 3.500% 9/19/29 (a)		1,100,000		1,190,348
Hercules Capital, Inc. 4.625% 10/23/22		2,910,000		2,945,776
KKR Group Finance Co. VI LLC 3.750% 7/01/29 (a)		1,260,000		1,449,564
KKR Group Finance Co. VIII LLC 3.500% 8/25/50 (a)		710,000		723,516
				7,113,900
Real Estate Investment Trusts (REITS) — 2.3%
Agree LP 2.900% 10/01/30		470,000		487,492
American Tower Trust #1
3.652% 3/15/48 (a)		1,910,000		2,072,114
Crown Castle International Corp. 5.200% 2/15/49		287,000		377,680
Healthcare Trust of America Holdings LP 3.500% 8/01/26		915,000		1,018,534
Highwoods Realty LP 4.125% 3/15/28		475,000		524,052
Host Hotels & Resorts LP 3.500% 9/15/30		2,120,000		2,029,286
SBA Tower Trust 1.884% 7/15/50 (a)		1,441,000		1,473,005
Service Properties Trust 4.500% 6/15/23		760,000		745,317
4.950% 10/01/29		1,155,000		990,412
Spirit Realty LP 3.200% 1/15/27		2,280,000		2,309,250
3.400% 1/15/30		515,000		512,037
4.000% 7/15/29		1,290,000		1,341,849
4.450% 9/15/26		133,000		142,713
Store Capital Corp. 4.625% 3/15/29		1,626,000		1,743,563
Tanger Properties LP 3.875% 12/01/23		1,448,000		1,456,272
VEREIT Operating Partnership LP 3.100% 12/15/29		2,790,000		2,794,878
3.400% 1/15/28		365,000		381,094
4.625% 11/01/25		2,260,000		2,497,086

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
WP Carey, Inc.
4.250% 10/01/26	$	757,000	$	854,647
				23,751,281
Retail — 0.6%
Advance Auto Parts, Inc.
1.750% 10/01/27		315,000		314,065
AutoZone, Inc.
1.650% 1/15/31		975,000		954,528
El Puerto de Liverpool SAB de CV
3.950% 10/02/24 (a)		2,620,000		2,728,101
Starbucks Corp.
2.550% 11/15/30		1,595,000		1,693,498
				5,690,192
Semiconductors — 0.2%
KLA Corp.
3.300% 3/01/50		1,615,000		1,706,282
Software — 0.4%
Broadridge Financial Solutions, Inc.
2.900% 12/01/29		1,210,000		1,310,827
Microsoft Corp.
4.450% 11/03/45		2,064,000		2,916,399
				4,227,226
Telecommunications — 1.5%
AT&T, Inc.
1.650% 2/01/28		680,000		681,286
3.500% 9/15/53 (a)		1,578,000		1,525,648
3.550% 9/15/55 (a)		5,153,000		4,994,147
Crown Castle Towers LLC
3.222% 5/15/42 (a)		1,700,000		1,724,814
4.241% 7/15/48 (a)		2,750,000		3,133,828
Qwest Corp
6.750% 12/01/21		725,000		765,636
Telefonica Emisiones SAU
4.665% 3/06/38		1,105,000		1,273,551
Verizon Communications, Inc.
6.550% 9/15/43		885,000		1,440,586
				15,539,496
Transportation — 0.3%
Autoridad del Canal de Panama
4.950% 7/29/35 (a)		1,050,000		1,305,948
CSX Corp.
4.750% 11/15/48		650,000		862,931
Norfolk Southern Corp.
4.050% 8/15/52		860,000		1,053,887
				3,222,766
TOTAL CORPORATE DEBT (Cost $394,012,068)				416,487,002

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Municipal Obligations — 0.4%
AccessLex Institute, Revenue Bonds, Series 2004-A, Class A3 1.699% 7/01/39 (d)	$	50,000	$	49,951
JobsOhio Beverage System Series B, Revenue Bonds 4.532% 1/01/35		1,950,000		2,503,585
Orange County Local Transportation Authority BAB, Revenue Bonds 6.908% 2/15/41		1,350,000		2,067,768
				4,621,304
TOTAL MUNICIPAL OBLIGATIONS (Cost $3,992,089)				4,621,304
Non-U.S. Government Agency Obligations — 31.1%
Automobile Asset-Backed Securities — 1.3%
Avis Budget Rental Car Funding AESOP LLC, Series 2019-1A, Class C 4.530% 3/20/23 (a)		1,271,000		1,287,054
Carmax Auto Owner Trust, Series 2019-3, Class D 2.850% 1/15/26		1,974,000		1,990,112
Carvana Auto Receivables Trust, Series 2019-4A, Class D 3.070% 7/15/25 (a)		1,625,000		1,671,771
Hertz Vehicle Financing II LP Series 2019-3A, Class B, 3.030% 12/26/25 (a)		2,293,000		2,282,684
Series 2018-1A, Class B, 3.600% 2/25/24 (a)		2,310,000		2,290,217
OneMain Direct Auto Receivables Trust, Series 2019-1A, Class B 3.950% 11/14/28 (a)		1,774,000		1,864,521
Santander Revolving Auto Loan Trust Series 2019-A, Class B, 2.800% 1/26/32 (a)		856,000		900,661
Series 2019-A, Class C, 3.000% 1/26/32 (a)		561,000		567,995
Series 2019-A, Class D, 3.450% 1/26/32 (a)		1,087,000		1,083,077
				13,938,092
Commercial Mortgage-Backed Securities — 5.5%
Aventura Mall Trust, Series 2018-AVM, Class C, 4.249% VRN 7/05/40 (a) (d)		4,270,000		4,009,047
BAMLL Commercial Mortgage Securities Trust, Series 2018-DSNY, Class C, 1 mo. USD LIBOR + 1.350% 1.502% FRN 9/15/34 (a)		670,000		626,465
BANK Series 2019-BN17, Class B, 4.128% VRN 4/15/52 (d)		441,000		510,490
Series 2019-BN16, Class AS, 4.267% 2/15/52		665,833		792,590
Series 2019-BN16, Class B, 4.438% VRN 2/15/52 (d)		547,420		612,081
BBCMS Mortgage Trust Series 2020-C7, Class AS, 2.444% 4/15/53		1,326,000		1,392,874
Series 2018-CHRS, Class B, 4.409% VRN 8/05/38 (a) (d)		2,250,000		2,000,607
Series 2018-CHRS, Class C, 4.409% VRN 8/05/38 (a) (d)		1,610,000		1,321,506
Series 2018-CHRS, Class D, 4.409% VRN 8/05/38 (a) (d)		1,370,000		1,030,630
Bear Stearns Commercial Mortgage Securities, Series 2007-T26, Class AM, 5.513% VRN 1/12/45 (d)		362,773		359,064
BHMS Mortgage Trust Series 2018-ATLS, Class A, 1 mo. USD LIBOR + 1.250% 1.402% FRN 7/15/35 (a)		4,450,000		4,255,385
Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500% 1.652% FRN 7/15/35 (a)		4,950,000		4,591,252
BX Commercial Mortgage Trust Series 2018-IND, Class B, 1 mo. USD LIBOR + .900% 1.052% FRN 11/15/35 (a)		735,000		732,303

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2020-BXLP, Class E, 1 mo. USD LIBOR + 1.600% 1.752% FRN 12/15/36 (a)	$	4,113,235	$	4,064,664
Series 2018-IND, Class E, 1 mo. USD LIBOR + 1.700% 1.852% FRN 11/15/35 (a)		1,876,000		1,860,886
Series 2019-XL, Class E, 1 mo. USD LIBOR + 1.800% 1.952% FRN 10/15/36 (a)		1,641,336		1,626,062
Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000% 2.152% FRN 10/15/36 (a)		1,982,134		1,958,732
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class D, 1 mo. USD LIBOR + 1.750%
1.902% FRN 12/15/37 (a)		898,516		878,586
Century Plaza Towers
Series 2019-CPT, Class D, 3.097% VRN 11/13/39 (a) (d)		982,000		979,183
Series 2019-CPT, Class E, 3.097% VRN 11/13/39 (a) (d)		1,556,000		1,468,825
Commercial Mortgage Pass-Through Certificates
Series 2012-CR4, Class B, 3.703% 10/15/45 (a)		1,060,000		692,134
Series 2014-UBS2, Class AM, 4.199% 3/10/47		1,375,000		1,477,202
Series 2015-CR23, Class C, 4.435% VRN 5/10/48  (d)		1,000,000		1,006,746
Series 2014-LC17, Class C, 4.705% VRN 10/10/47  (d)		2,908,000		2,943,687
Jackson Park Trust, Series 2019-LIC, Class C,
3.131% VRN 10/14/39 (a) (d)		2,300,000		2,374,559
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800%
1.952% FRN 5/15/36 (a)		1,505,000		1,488,548
Manhattan West, Series 2020-1MW, Class B,
2.413% VRN 9/10/39 (a) (d)		2,122,000		2,174,247
MFT Trust
Series 2020-ABC, Class A, 3.358% 2/10/42 (a)		919,000		950,507
Series 2020-ABC, Class B, 3.477% VRN 2/10/42 (a) (d)		1,003,000		1,018,731
MKT Mortgage Trust
Series 2020-525M, Class D, 2.941% VRN 2/12/40 (a) (d)		475,000		464,465
Series 2020-525M, Class E, 2.941% VRN 2/12/40 (a) (d)		976,000		911,014
Morgan Stanley Capital I Trust
Series 2019-L2, Class AS, 4.272% 3/15/52		1,950,000		2,291,275
Series 2018-H3, Class B, 4.620% VRN 7/15/51  (d)		760,000		878,977
Series 2011-C2, Class B, 5.200% VRN 6/15/44 (a) (d)		1,325,000		1,330,081
Wells Fargo Commercial Mortgage Trust
Series 2018-C45, Class AS, 4.405% VRN 6/15/51  (d)		1,450,000		1,701,505
Series 2018-C45, Class B, 4.556% 6/15/51		400,000		439,686
				57,214,596
Other Asset-Backed Securities — 14.8%
321 Henderson Receivables LLC, Series 2015-1A, Class A
3.260%9/15/72 (a)		1,863,640		1,938,805
522 Funding CLO I Ltd., Series 2018-2A, Class C, 3 mo. USD LIBOR + 2.250%
2.522% FRN 10/20/31 (a)		820,000		798,516
AASET Trust
Series 2020-1A, Class A, 3.351% 1/16/40 (a)		1,549,240		1,427,493
Series 2019-1, Class A, 3.844% 5/15/39 (a)		1,683,470		1,568,743
Series 2018-2A, Class A, 4.454% 11/18/38 (a)		1,495,616		1,391,025
Adams Outdoor Advertising LP, Series 2018-1, Class A
4.810% 11/15/48 (a)		1,920,026		1,997,748
AGL CLO 7 Ltd., Series 2020-7A, Class A1, 3 mo. USD LIBOR + 1.800%
2.050% FRN 7/15/31 (a)		375,000		375,860
AIMCO CLO, Series 2019-10A, Class C, 3 mo. USD LIBOR + 2.450%
2.708% FRN 7/22/32 (a)		2,000,000		1,963,998

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Allegro CLO X Ltd., Series 2019-1A, Class C, 3 mo. USD LIBOR + 2.750% 3.022% FRN 4/20/32 (a)	$	2,200,000	$	2,200,587
Anchorage Capital CLO Ltd., Series 2020-15A, Class A, 3 mo. USD LIBOR + 1.850% 2.089% FRN 7/20/31 (a)		1,500,000		1,505,416
Atrium XV, Series 15A, Class B, 3 mo. USD LIBOR + 1.750% 2.006% FRN 1/23/31 (a)		1,190,000		1,175,055
Avery Point VII CLO Ltd., Series 2015-7A, Class DR, 3 mo. USD LIBOR + 3.600% 3.875% FRN 1/15/28 (a)		1,000,000		954,041
Ballyrock CLO Ltd., Series 2019-2A, Class C, 3 mo. USD LIBOR + 4.100% 4.353% FRN 11/20/30 (a)		400,000		399,904
Benefit Street Partners CLO X Ltd., Series 2016-10A, Class CR, 3 mo. USD LIBOR + 3.500% 3.775% FRN 1/15/29 (a)		500,000		470,490
Benefit Street Partners CLO XVIII Ltd., Series 2019-18A, Class B, 3 mo. USD LIBOR + 1.950% 2.225% FRN 10/15/32 (a)		500,000		500,310
BRE Grand Islander Timeshare Issuer LLC, Series 2017-1A, Class A 2.940% 5/25/29 (a)		499,493		501,748
CAL Funding II Ltd., Series 2018-2A, Class A 4.340% 9/25/43 (a)		1,216,000		1,205,816
Canyon Capital CLO Ltd., Series 2019-2A, Class C, 3 mo. USD LIBOR + 2.750% 3.025% FRN 10/15/32 (a)		250,000		247,272
Capital Automotive REIT Series 2014-1A, Class A, 3.660% 10/15/44 (a)		850,298		848,845
Series 2017-1A, Class A2, 4.180% 4/15/47 (a)		938,608		941,552
Carlyle Global Market Strategies CLO Ltd., Series 2015-3A, Class CR, 3 mo. USD LIBOR + 2.850% 3.097% FRN 7/28/28 (a)		330,000		308,274
CARS-DB4 LP Series 2020-1A, Class A3, 3.250% 2/15/50 (a)		495,699		508,473
Series 2020-1A, Class A6, 3.810% 2/15/50 (a)		398,000		412,485
Castlelake Aircraft Securitization Trust, Series 2019-1A, Class A 3.967% 4/15/39 (a)		1,289,292		1,193,185
Castlelake Aircraft Structured Trust, Series 2018-1, Class A 4.125% 6/15/43 (a)		1,343,348		1,254,108
CBAM Ltd. Series 2019-10A, Class B, 3 mo. USD LIBOR + 2.050% 2.322% FRN 4/20/32 (a)		1,900,000		1,902,316
Series 2018-6A, Class B1R, 3 mo. USD LIBOR + 2.100% 2.375% FRN 1/15/31 (a)		900,000		900,474
CF Hippolyta LLC Series 2020-1, Class A1, 1.690% 7/15/60 (a)		1,200,000		1,213,561
Series 2020-1, Class B1, 2.280% 7/15/60 (a)		547,000		556,555
CIFC Funding Ltd. Series 2017-5A, Class A1, 3 mo. USD LIBOR + 1.180% 1.453% FRN 11/16/30 (a)		2,330,000		2,309,547
Series 2020-1A, Class A1, 3 mo. USD LIBOR + 1.700% 1.942% FRN 7/15/32 (a)		1,000,000		1,003,013
Clear Creek CLO Ltd., Series 2015-1A, Class AR, 3 mo. USD LIBOR + 1.200% 1.472% FRN 10/20/30 (a)		2,040,000		2,014,592
Cronos Containers Program Ltd., Series 2014-2A, Class A 3.270% 11/18/29 (a)		211,111		211,445
DB Master Finance LLC, Series 2019-1A, Class A23 4.352% 5/20/49 (a)		1,542,420		1,686,093

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Domino's Pizza Master Issuer LLC Series 2019-1A, Class A2, 3.668% 10/25/49 (a)	$	1,091,750	$	1,158,996
Series 2017-1A, Class A23, 4.118% 7/25/47 (a)		758,550		809,898
Series 2015-1A, Class A2II, 4.474% 10/25/45 (a)		2,976,000		3,164,523
Dryden 72 CLO Ltd., Series 2019-72A, Class B, 3 mo. USD LIBOR + 1.900% 2.180% FRN 5/15/32 (a)		1,500,000		1,500,460
Eaton Vance CLO Ltd. Series 2018-1A, Class B, 3 mo. USD LIBOR + 1.750% 2.025% FRN 10/15/30 (a)		1,700,000		1,691,638
Series 2019-1A, Class B, 3 mo. USD LIBOR + 1.950% 2.225% FRN 4/15/31 (a)		1,800,000		1,802,558
Series 2020-1A, Class C, 3 mo. USD LIBOR + 2.800% 3.050% FRN 10/15/30 (a)		350,000		350,172
Elmwood CLO Ltd., Series 2019-2A, Class A, 3 mo. USD LIBOR + 1.450% 1.722% FRN 4/20/31 (a)		2,900,000		2,901,122
Elmwood CLO Ltd., Series 2019-3A, Class B, 3 mo. USD LIBOR + 1.950% 2.225% FRN 10/15/32 (a)		350,000		350,764
FCI Funding  LLC, Series 2019-1A, Class A 3.630% 2/18/31 (a)		310,031		315,447
Flatiron CLO Ltd. Series 2019-1A, Class B, 3 mo. USD LIBOR + 1.900% 2.180% FRN 11/16/32 (a)		350,000		350,076
Series 2019-1A, Class C, 3 mo. USD LIBOR + 2.700% 2.980% FRN 11/16/32 (a)		250,000		246,273
Global SC Finance SRL, Series 2014-1A, Class A1 3.190% 7/17/29 (a)		191,667		190,663
Goodgreen Trust Series 2019-2A, Class A, 2.760% 10/15/54 (a)		2,786,653		2,824,164
Series 2016-1A, Class A, 3.230% 10/15/52 (a)		1,597,423		1,660,471
Series 2017-1A, Class A, 3.740% 10/15/52 (a)		760,272		801,850
Series 2019-1A, Class A, 3.860% 10/15/54 (a)		1,326,099		1,404,292
Harbor Park CLO Ltd., Series 2018-1A, Class B1, 3 mo. USD LIBOR + 1.700% 1.972% FRN 1/20/31 (a)		1,290,000		1,285,940
Helios Issuer LLC, Series 2017-1A, Class A 4.940% 9/20/49 (a)		1,478,654		1,574,039
Hero Funding Trust Series 2016-3A, Class A1, 3.080% 9/20/42 (a)		830,271		841,898
Series 2017-3A, Class A1, 3.190% 9/20/48 (a)		867,780		894,322
Series 2017-2A, Class A1, 3.280% 9/20/48 (a)		256,114		264,979
Series 2016-4A, Class A1, 3.570% 9/20/47 (a)		1,028,352		1,070,086
Series 2017-2A, Class A2, 4.070% 9/20/48 (a)		205,895		217,483
Series 2018-1A, Class A2, 4.670% 9/20/48 (a)		1,554,656		1,668,248
Horizon Aircraft Finance I Ltd., Series 2018-1, Class A 4.458% 12/15/38 (a)		940,892		888,848
Horizon Aircraft Finance Ltd. Series 2019-2, Class A, 3.425% 11/15/39 (a)		2,335,647		2,141,404
Series 2019-1, Class A, 3.721% 7/15/39 (a)		1,317,248		1,229,905
ICG US CLO Ltd., Series 2019-1A, Class A1A, 3 mo. USD LIBOR + 1.380% 1.625% FRN 10/26/32 (a)		750,000		744,523
J.G. Wentworth LLC, Series 2018-2A, Class A 3.960% 10/15/75 (a)		1,380,609		1,412,461
KREF Ltd., Series 2018-FL1, Class C, 1 mo. USD LIBOR + 2.000% 2.151% FRN 6/15/36 (a)		1,670,000		1,621,078
Labrador Aviation Finance Ltd., Series 2016-1A, Class A1 4.300% 1/15/42 (a)		2,173,750		1,921,755
Lunar Aircraft Ltd., Series 2020-1A, Class A 3.376% 2/15/45 (a)		957,745		887,223

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
MACH 1 Cayman Ltd., Series 2019-1, Class A 3.474% 10/15/39 (a)	$	2,057,302	$	1,871,253
Madison Park Funding Ltd. Series 2018-28A, Class B, 3 mo. USD LIBOR + 1.600% 1.875% FRN 7/15/30 (a)		1,665,000		1,635,798
Series 2018-29A, Class C, 3 mo. USD LIBOR + 2.200% 2.472% FRN 10/18/30 (a)		620,000		603,639
Magnetite XXVI Ltd., Series 2020-26A, Class A, 3 mo. USD LIBOR + 1.750% 1.949% FRN 7/15/30 (a)		1,500,000		1,504,158
Magnetite XXVII Ltd., Series 2020-27A, Class C, 3 mo. USD LIBOR + 2.650% 2.899% FRN 7/20/33 (a)		450,000		450,347
Mosaic Solar Loans LLC Series 2018-1A, Class A, 4.010% 6/22/43 (a)		289,230		305,469
Series 2017-1A, Class A, 4.450% 6/20/42 (a)		300,650		322,721
MP CLO III Ltd., Series 2013-1A, Class AR, 3 mo. USD LIBOR + 1.250% 1.522% FRN 10/20/30 (a)		1,750,000		1,728,573
MVW Owner Trust, Series 2017-1A, Class A 2.420% 12/20/34 (a)		167,577		170,849
NP SPE LLC, Series 2017-1A, Class A2 4.219% 10/21/47 (a)		2,260,000		2,322,812
OCP CLO 2018-15 Ltd., Series 2018-15A, Class A1, 1.372% FRN 7/20/31 (a) (d)		250,000		246,454
OHA Credit Funding Ltd. Series 2019-4A, Class A1, 3 mo. USD LIBOR + 1.330% 1.588% FRN 10/22/32 (a)		1,000,000		994,220
Series 2019-4A, Class C, 3 mo. USD LIBOR + 2.650% 2.908% FRN 10/22/32 (a)		500,000		498,885
OneMain Financial Issuance Trust Series 2020-2A, Class B, 2.210% 9/14/35 (a)		396,000		394,918
Series 2019-2A, Class A, 3.140% 10/14/36 (a)		8,400,000		8,951,852
Oxford Finance Funding Trust Series 2020-1A, Class A2, 3.101% 2/15/28 (a)		1,536,000		1,557,957
Series 2016-1A, Class A, 3.968% 6/17/24 (a)		171,050		171,116
Pioneer Aircraft Finance Ltd., Series 2019-1, Class A 3.967% 6/15/44 (a)		1,529,217		1,415,274
Planet Fitness Master Issuer LLC, Series 2019-1A, Class A2 3.858% 12/05/49 (a)		2,304,585		2,167,534
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850% 2.998% FRN 2/25/23 (a)		1,270,000		1,239,538
Rockford Tower CLO Ltd., Series 2019-1A, Class B1, 3 mo. USD LIBOR + 2.050% 2.322% FRN 4/20/32 (a)		1,500,000		1,500,074
RR 3 Ltd., Series 2018-3A, Class A1R2, 3 mo. USD LIBOR + 1.090% 1.365% FRN 1/15/30 (a)		2,450,000		2,424,339
Sierra Receivables Funding LLC Series 2020-2A, Class B, 2.320% 7/20/37 (a)		975,489		974,678
Series 2015-3A, Class B, 3.080% 9/20/32 (a)		71,041		70,975
Series 2018-3A, Class D, 5.200% 9/20/35 (a)		737,935		712,690
Stack Infrastructure Issuer LLC, Series 2020-1A, Class A2 1.893% 8/25/45 (a)		874,000		879,827
Steele Creek CLO Ltd., Series 2018-2A, Class C, 3 mo. USD LIBOR + 2.300% 2.570% FRN 8/18/31 (a)		1,170,000		1,092,769
Store Master Funding I-VII Series 2019-1, Class A2, 3.650% 11/20/49 (a)		2,866,967		2,908,508

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2018-1A, Class A2, 4.290% 10/20/48 (a)	$	1,296,539	$	1,373,002
Structured Asset Securities Corp. Mortgage Loan Trust, Series 2006-GEL1, Class M2, 1 mo. USD LIBOR + .800% 0.948% FRN 11/25/35 (a)		3,295,874		3,139,579
Structured Receivables Finance LLC, Series 2010-B, Class A 3.730% 8/15/36 (a)		144,382		151,428
Sunnova Helios II Issuer LLC, Series 2018-1A, Class A 4.870% 7/20/48 (a)		439,146		472,517
SuttonPark Structured Settlements LLC, Series 2017-1A, Class A 4.190% 1/15/71 (a)		1,925,081		2,227,328
Taco Bell Funding LLC, Series 2018-1A, Class A2II 4.940% 11/25/48 (a)		1,120,050		1,195,773
TAL Advantage VII LLC, Series 2020-1A, Class A 2.050% 9/20/45 (a)		4,500,000		4,508,041
Textainer Marine Containers VII Ltd., Series 2019-1A, Class A 3.960% 4/20/44 (a)		485,893		485,893
Tif Funding II LLC, Series 2020-1A, Class A 2.090% 8/20/45 (a)		641,963		640,908
Trinity Rail Leasing LP Series 2019-2A, Class A2, 3.100% 10/18/49 (a)		3,289,000		3,207,850
Series 2018-1A, Class A2, 4.620% 6/17/48 (a)		2,420,000		2,459,775
Trip Rail Master Funding LLC, Series 2017-1A, Class A1 2.709% 8/15/47 (a)		174,097		174,252
Triton Container Finance VIII LLC, Series 2020-1A, Class A 2.110% 9/20/45 (a)		3,150,000		3,154,052
Vantage Data Centers LLC, Series 2020-2A, Class A2 1.992% 9/15/45 (a) (c)		1,301,000		1,301,596
Vivint Solar Financing V LLC, Series 2018-1A, Class B 7.370% 4/30/48 (a)		2,621,999		2,661,135
WAVE LLC Series 2019-1A, Class A, 3.597% 9/15/44 (a)		3,861,264		3,581,593
Series 2017-1A, Class C, 6.656% 11/15/42 (a)		1,843,383		770,634
WAVE Trust, Series 2017-1A, Class A 3.844% 11/15/42 (a)		3,119,083		2,822,296
Willis Engine Structured Trust IV, Series 2018-A, Class A, 4.750% STEP 9/15/43 (a)		1,171,900		988,429
Wind River CLO Ltd. Series 2018-2A, Class B, 3 mo. USD LIBOR + 1.750% 2.025% FRN 7/15/30 (a)		1,150,000		1,132,864
Series 2016-2A, Class BR, 3 mo. USD LIBOR + 1.800% 2.051% FRN 11/01/31 (a)		900,000		889,574
				154,530,650
Student Loans Asset-Backed Securities — 9.0%
Chase Education Loan Trust, Series 2007-A, Class A4, 3 mo. USD LIBOR + .100% 0.333% FRN 6/28/39		5,411,817		5,145,033
College Avenue Student Loans LLC Series 2019-A, Class B, 3.810% 12/28/48 (a)		2,244,000		2,222,161
Series 2019-A, Class C, 4.460% 12/28/48 (a)		1,281,000		1,267,952
College Loan Corp. Trust I, Series 2007-1, Class B2, 28 day ARS FRN 1/25/47		900,000		716,499
ECMC Group Student Loan Trust Series 2018-2A, Class A, 1 mo. USD LIBOR + .800% 0.948% FRN 9/25/68 (a)		1,998,397		1,960,808
Series 2017-1A, Class A, 1 mo. USD LIBOR + 1.200% 1.348% FRN 12/27/66 (a)		2,142,787		2,130,925

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
EdLinc Student Loan Funding, Series 2017-A, Class A, PRIME - 1.150% 3.600% FRN 12/01/47 (a)	$	1,840,217	$	1,818,476
Education Services of America Series 2014-4, Class B, 1 mo. USD LIBOR + 1.500% 1.648% FRN 6/25/48 (a)		1,200,000		1,160,393
Series 2015-1, Class B, 1 mo. USD LIBOR + 1.500% 1.648% FRN 10/25/56 (a)		1,100,000		1,060,027
Educational Funding of the South, Inc., Series 2011-1, Class B, 3 mo. USD LIBOR + 3.700% 3.945% FRN 4/25/46		625,000		596,975
EDvestinU Private Education Loan Issue No 1 LLC, Series 2019-A, Class A, 3.580% VRN 11/25/38 (a) (d)		1,338,821		1,420,627
Higher Education Funding I Series 2004-1, Class B2, 28 day ARS 0.000%FRN 1/01/44 (a)		450,000		393,099
Series 2004-1, Class B1, 28 day ARS 1.796% FRN 1/01/44 (a)		450,000		399,331
Laurel Road Prime Student Loan Trust, Series 2017-B, Class BFX 3.020% 8/25/42 (a)		547,785		553,579
Navient Private Education Refi Loan Trust Series 2019-CA, Class B, 3.670% 2/15/68 (a)		2,249,000		2,310,289
Series 2019-A, Class B, 3.900% 1/15/43 (a)		1,190,000		1,213,879
Series 2018-CA, Class B, 4.220% 6/16/42 (a)		1,530,000		1,547,367
Navient Student Loan Trust Series 2018-3A, Class A3, 1 mo. USD LIBOR + .800% 0.948% FRN 3/25/67 (a)		4,700,000		4,653,552
Series 2019-1A, Class A2, 1 mo. USD LIBOR + .900% 1.048% FRN 12/27/67 (a)		4,530,000		4,517,987
Series 2016-7A, Class A, 1 mo. USD LIBOR + 1.150% 1.298% FRN 3/25/66 (a)		1,724,855		1,724,855
Series 2016-5A, Class A, 1 mo. USD LIBOR + 1.250% 1.398% FRN 6/25/65 (a)		3,117,011		3,117,010
Series 2016-6A, Class A3, 1 mo. USD LIBOR + 1.300% 1.448% FRN 3/25/66 (a)		7,050,000		7,111,640
Series 2015-3, Class B, 1 mo. USD LIBOR + 1.500% 1.648% FRN 10/25/58		940,000		847,173
Series 2016-2, Class A3, 1 mo. USD LIBOR + 1.500% 1.648% FRN 6/25/65 (a)		2,370,000		2,353,231
Series 2019-BA, Class B, 4.040% 12/15/59 (a)		2,950,000		3,077,619
Nelnet Private Education Loan Trust, Series 2016-A, Class A1B 3.600% 12/26/40 (a)		358,059		359,898
Nelnet Student Loan Trust Series 2006-3, Class B, 3 mo. USD LIBOR + .250% 0.475% FRN 6/25/41		564,505		488,373
Series 2019-2A, Class A, 1 mo. USD LIBOR + .900% 1.075% FRN 6/27/67 (a)		1,617,440		1,600,655
Series 2019-1A, Class B, 1 mo. USD LIBOR + 1.400% 1.548% FRN 4/25/67 (a)		3,250,000		3,066,017
Series 2005-4, Class A4A, 7 day ARS 1.929% FRN 3/22/32		315,057		302,450
Series 2019-5, Class B, 3.450% 10/25/67 (a)		2,150,000		2,047,263
SLC Student Loan Trust, Series 2007-1, Class A5, 3 mo. USD LIBOR + .090% 0.370% FRN 2/15/68		4,000,000		3,542,900
SLM Student Loan Trust Series 2006-2, Class R, 0.000% 1/25/41		7,308		4,401,722
Series 2006-5, Class B, 3 mo. USD LIBOR + .210% 0.455% FRN 10/25/40		1,859,707		1,662,654
Series 2005-6, Class B, 3 mo. USD LIBOR + .290% 0.535% FRN 1/25/44		1,933,416		1,722,662
Series 2003-14, Class A7, 3 mo. USD LIBOR + .600% 0.845% FRN 10/25/65 (a)		4,300,000		4,200,583
SoFi Alternative Trust, Series 2019-C, Class PT, 4.861% VRN 1/25/45 (a) (d)		5,045,961		5,424,408

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
SoFi Professional Loan Program LLC
Series 2017-D, Class R1, 0.000% 9/25/40 (a)	$	4,688,500	$	1,617,626
Series 2018-A, Class R1, 0.000% 2/25/42 (a)		3,759,800		1,554,459
Series 2018-B, Class R1, 0.000% 8/26/47 (a)		3,324,300		1,227,664
Series 2018-D, Class R1, 0.000% 2/25/48 (a)		4,961,600		1,097,010
Series 2019-A, Class R1, 0.000% 6/15/48 (a)		6,724,700		1,593,081
Series 2017-C, Class C, 4.210% VRN 7/25/40 (a) (d)		990,000		1,003,872
South Carolina Student Loan Corp., Series 2014-1, Class B, 1 mo. USD LIBOR + 1.500% 1.655% FRN 8/01/35		3,050,000		2,927,219
				93,161,003
Whole Loan Collateral Collateralized Mortgage Obligations — 0.5%
Bank of America Mortgage Securities, Series 2004-G, Class 2A7, 3.091% VRN 8/25/34 (d)		18,209		17,806
Countrywide Home Loans, Inc. Series 2004-2, Class 1A1, 3.666% VRN 2/25/34  (d)		14,677		14,170
Series 2003-42, Class 1A1, 3.991% VRN 9/25/33  (d)		3,871		3,713
Deephaven Residential Mortgage Trust, Series 2019-1A, Class A3, 3.948% VRN 1/25/59 (a) (d)		540,208		546,141
GSR Mortgage Loan Trust, Series 2004-9, Class 2A1, 3.490% VRN 8/25/34  (d)		5,542		5,595
IndyMac Index Mortgage Loan Trust, Series 2004-AR4, Class 1A, 3.165% VRN 8/25/34  (d)		34,625		34,524
JP Morgan Mortgage Trust, Series 2017-1, Class A11, 3.500% VRN 1/25/47 (a) (d)		1,946,788		1,984,555
Merrill Lynch Mortgage Investors, Inc. Series 2003-A4, Class IA, 3.032% VRN 7/25/33  (d)		1,857		1,770
Series 2004-A1, Class IA, 3.250% VRN 2/25/34  (d)		1,888		1,864
PSMC Trust, Series 2018-2, Class A1, 3.500% VRN 6/25/48 (a) (d)		1,687,735		1,717,781
Sequoia Mortgage Trust, Series 2019-1, Class A1, 4.000% VRN 2/25/49 (a) (d)		208,150		212,154
Structured Adjustable Rate Mortgage Loan Trust, Series 2004-2, Class 2A, 2.970% VRN 3/25/34  (d)		15,461		15,346
Washington Mutual Mortgage Pass-Through Certificates, Series 2004-AR2, Class A, 12 mo. MTA + 1.400% 2.419% FRN 4/25/44		45,680		43,688
Wells Fargo Mortgage Backed Securities Trust, Series 2019-1, Class A1, 4.000% VRN 11/25/48 (a) (d)		875,326		893,747
				5,492,854
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $329,645,284)				324,337,195
Sovereign Debt Obligations — 0.7%
Colombia Government International Bond 6.125% 1/18/41		2,080,000		2,667,600
Mexico Government International Bond 4.750% 3/08/44		3,727,000		4,064,294
6.750% 9/27/34		685,000		918,585
				7,650,479
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $6,705,365)				7,650,479

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
U.S. Government Agency Obligations and Instrumentalities — 22.9%
Collateralized Mortgage Obligations — 0.3%
Federal Home Loan Mortgage Corp. Series 2617, Class Z, 5.500% 5/15/33	$	847,821	$	980,498
Series 2693, Class Z, 5.500% 10/15/33		1,533,885		1,741,651
Series 2178, Class PB, 7.000% 8/15/29		32,207		36,556
				2,758,705
Pass-Through Securities — 22.2%
Federal Home Loan Mortgage Corp. Pool #J13972 3.500% 1/01/26		28,159		29,899
Pool #C91344 3.500% 11/01/30		89,415		96,158
Pool #C91424 3.500% 1/01/32		59,321		63,980
Pool #RA2483 3.500% 6/01/50		10,178,837		10,841,234
Pool #C91239 4.500% 3/01/29		4,349		4,801
Pool #C91251 4.500% 6/01/29		28,858		31,858
Pool #G05253 5.000% 2/01/39		149,993		172,757
Pool #C90939 5.500% 12/01/25		15,172		16,880
Pool #D97258 5.500% 4/01/27		10,355		11,537
Pool #C91026 5.500% 4/01/27		25,449		28,353
Pool #C91074 5.500% 8/01/27		2,669		2,976
Pool #D97417 5.500% 10/01/27		9,444		10,527
Pool #C91128 5.500% 12/01/27		1,393		1,553
Pool #C91148 5.500% 1/01/28		62,580		69,761
Pool #C91176 5.500% 5/01/28		21,622		24,123
Pool #C91217 5.500% 11/01/28		8,621		9,618
Pool #C01079 7.500% 10/01/30		1,037		1,217
Pool #C01135 7.500% 2/01/31		4,129		4,816
Federal National Mortgage Association Pool #775539 12 mo. USD LIBOR + 1.641% 2.516% FRN 5/01/34		13,871		14,441
Pool #MA3029 3.000% 6/01/32		2,861,431		3,016,131
Pool #MA3090 3.000% 8/01/32		1,222,188		1,288,264
Pool #AO8180 3.000% 9/01/42		23,907		25,461
Pool #AP8668 3.000% 12/01/42		148,155		157,786
Pool #AR1975 3.000% 12/01/42		34,313		36,544
Pool #AB7397 3.000% 12/01/42		133,764		142,460
Pool #AB7401 3.000% 12/01/42		119,663		127,442
Pool #AR0306 3.000% 1/01/43		8,702		9,268
Pool #AR5391 3.000% 1/01/43		69,072		73,562
Pool #AL3215 3.000% 2/01/43		109,340		116,449
Pool #AR4109 3.000% 2/01/43		107,613		114,609
Pool #AT0169 3.000% 3/01/43		211,307		225,044
Pool #AB8809 3.000% 3/01/43		58,095		61,872
Pool #MA1368 3.000% 3/01/43		207,899		221,415
Pool #AR4432 3.000% 3/01/43		46,644		49,677
Pool #AR2174 3.000% 4/01/43		213,057		226,907
Pool #725692 1 year CMT + 2.137% 3.138% FRN 10/01/33		60,615		63,492
Pool #888586 1 year CMT + 2.196% 3.326% FRN 10/01/34		76,517		80,631
Pool #AS1304 3.500% 12/01/28		968,818		1,041,756
Pool #AV1897 3.500% 12/01/28		180,129		193,690
Pool #AV2325 3.500% 12/01/28		503,572		541,483
Pool #MA1356 3.500% 2/01/43		7,774,599		8,438,460
Pool #CA6096 3.500% 6/01/50		9,323,238		10,020,276
Pool #FM4017 3.500% 8/01/50		898,668		951,813
Pool #AA3980 4.500% 4/01/28		50,116		54,342
Pool #CA1909 4.500% 6/01/48		5,554,063		6,013,807

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #AD6437 5.000% 6/01/40	$	360,572	$	413,277
Pool #AD6996 5.000% 7/01/40		2,340,446		2,682,554
Pool #AL8173 5.000% 2/01/44		964,119		1,096,911
Pool #AD0836 5.500% 11/01/28		49,796		55,498
Pool #575667 7.000% 3/01/31		6,997		8,302
Pool #529453 7.500% 1/01/30		2,322		2,726
Pool #535996 7.500% 6/01/31		3,756		4,402
Pool #252926 8.000% 12/01/29		82		95
Pool #532819 8.000% 3/01/30		112		130
Pool #534703 8.000% 5/01/30		2,382		2,775
Pool #253437 8.000% 9/01/30		99		116
Pool #253481 8.000% 10/01/30		58		68
Pool #190317 8.000% 8/01/31		2,326		2,722
Pool #602008 8.000% 8/01/31		3,299		3,857
Pool #597220 8.000% 9/01/31		2,834		3,343
Government National Mortgage Association Pool #371146 7.000% 9/15/23		50		52
Pool #374440 7.000% 11/15/23		186		197
Pool #352022 7.000% 11/15/23		2,224		2,355
Pool #491089 7.000% 12/15/28		6,398		6,976
Pool #480539 7.000% 4/15/29		212		239
Pool #488634 7.000% 5/15/29		1,927		2,191
Pool #500928 7.000% 5/15/29		3,074		3,530
Pool #499410 7.000% 7/15/29		1,104		1,272
Pool #510083 7.000% 7/15/29		756		862
Pool #493723 7.000% 8/15/29		2,245		2,588
Pool #581417 7.000% 7/15/32		4,417		5,032
Government National Mortgage Association II Pool# MA6656 3.000% 5/20/50		9,698,561		10,177,931
Pool# MA6710 3.000% 6/20/50		9,758,808		10,262,504
Pool #008746 1 year CMT + 1.500% 3.125% FRN 11/20/25		2,648		2,702
Pool #080136 1 year CMT + 1.500% 3.125% FRN 11/20/27		584		598
Pool #MA4321 3.500% 3/20/47		6,803,968		7,278,338
Government National Mortgage Association II TBA Pool #548 3.000% 8/01/49  (c)		1,975,000		2,067,732
Pool #1635 3.500% 6/01/49  (c)		58,720,000		61,839,500
Uniform Mortgage Backed Securities TBA Pool #505 2.000% 5/01/35  (c)		43,225,000		44,933,736
Pool #1082 2.000% 4/01/50  (c)		15,025,000		15,536,789
Pool #17115 3.500% 4/01/49  (c)		28,200,000		29,728,970
				230,860,000
Whole Loans — 0.4%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes Series 2016-HQA3, Class M2, 1 mo. USD LIBOR + 1.350% 1.498% FRN 3/25/29		64,131		64,029
Series 2020-DNA3, Class M1, 1 mo. USD LIBOR + 1.500% 1.648% FRN 6/25/50 (a)		2,630,000		2,634,425
Series 2020-DNA3, Class M2, 1 mo. USD LIBOR + 3.000% 3.148% FRN 6/25/50 (a)		1,908,000		1,913,328
				4,611,782
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $236,992,192)				238,230,487

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
U.S. Treasury Obligations — 3.3%
U.S. Treasury Bonds & Notes — 3.3%
U.S. Treasury Bond 2.250% 8/15/49 (e)	$	9,800,000	$	11,683,417
3.500% 2/15/39 (e)		7,000,000		9,834,446
U.S. Treasury Note 0.375% 4/30/25		12,300,000		12,373,206
				33,891,069
TOTAL U.S. TREASURY OBLIGATIONS (Cost $32,262,520)				33,891,069
TOTAL BONDS & NOTES (Cost $1,003,609,518)				1,025,217,536
TOTAL PURCHASED OPTIONS (#) — 0.2% (Cost $2,989,580)				2,018,451
TOTAL LONG-TERM INVESTMENTS (Cost $1,008,974,098)				1,029,703,137
Short-Term Investments — 15.7%
Commercial Paper — 15.7%
American Honda Finance Corp. 0.315% 11/19/20		11,000,000		10,996,074
Avangrid, Inc. 0.223% 12/07/20		1,000,000		999,594
0.233% 12/07/20		10,000,000		9,995,939
BAT International Finance 0.233% 10/14/20 (a)		3,000,000		2,999,482
Bemis Co., Inc. 0.142% 10/05/20 (a)		2,000,000		1,999,961
0.183% 10/21/20 (a)		9,000,000		8,999,034
Dominion Resources, Inc. 0.203% 10/13/20		11,000,000		10,999,305
Duke Energy Corp. 0.223% 10/02/20 (a)		4,000,000		3,999,980
Enbridge (US), Inc. 0.203% 10/20/20 (a)		7,000,000		6,999,288
FMC Tech, Inc. 0.254% 10/15/20 (a)		6,000,000		5,999,550
Harley-Davidson Funding Corp. 0.203% 10/19/20 (a)		2,000,000		1,999,779
0.203% 10/20/20 (a)		1,000,000		999,891
0.254% 10/08/20 (a)		1,000,000		999,962
0.304% 10/19/20 (a)		6,000,000		5,999,338
Intercontinental Exchange, Inc. 0.376% 12/03/20 (a) (f)		10,000,000		9,993,370
Keurig Dr Pepper, Inc. 0.193% 10/13/20 (a)		1,000,000		999,937
LyondellBasell Industries NV 0.162% 10/28/20 (a)		11,000,000		10,998,383
Macquarie Bank Ltd. 0.188% 12/17/20 (a)		4,000,000		3,998,319

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
NRW Bank 0.162% 10/15/20 (a)	$	5,000,000	$	4,999,813
0.172% 11/02/20 (a)		3,000,000		2,999,670
0.183% 12/08/20 (a)		5,000,000		4,998,534
Nutrien Ltd. 0.213% 12/22/20 (a)		1,000,000		999,481
0.223% 12/24/20 (a)		9,000,000		8,995,176
Parker-Hannifin Corp. 0.152% 11/13/20 (a)		6,000,000		5,998,423
Schlumberger Holdings Corp. 0.254% 1/11/21 (a)		1,000,000		999,671
0.406% 12/09/20 (a)		10,000,000		9,998,444
Spire, Inc. 0.183% 10/13/20 (a)		11,500,000		11,499,273
Suncor Energy, Inc. 0.223% 11/23/20 (a)		1,000,000		999,691
0.254% 12/07/20 (a)		11,000,000		10,995,533
				163,460,895
TOTAL SHORT-TERM INVESTMENTS (Cost $163,453,568)				163,460,895
TOTAL INVESTMENTS — 114.5% (Cost $1,172,427,666) (g)				1,193,164,032
Other Assets/(Liabilities) — (14.5)%				(151,242,426	)
NET ASSETS — 100.0%			$	1,041,921,606

Abbreviation Legend

ARS	Auction Rate Security
BAB	Build America Bonds
CLO	Collateralized Loan Obligation
FRN	Floating Rate Note
STEP	Step Up Bond
TBA	To Be Announced
VRN	Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At September 30, 2020, the aggregate market value of these securities amounted to $521,180,007 or 50.02% of net assets.
(b)	Security is perpetual and has no stated maturity date.
(c)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.
(d)	Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions.  These securities do not indicate a reference rate and spread in their description above. The rates shown are the current interest rates at September 30, 2020.
(e)	A portion of this security is pledged/held as collateral for open derivatives.
(f)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At September 30, 2020, these securities amounted to a value of $9,993,370 or 0.96% of net assets.
(g)	See Note 3 for aggregate cost for federal tax purposes.

MML Managed Bond Fund —  Portfolio of Investments (Continued)

(#) Interest Rate Swaptions Purchased

			Paid by Fund		Received by Fund
Description	Counterparty	Expiration Date	Rate	Frequency	Rate	Frequency	Notional Amount		Value		Premium Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	3-Month USD LIBOR BBA	Quarterly	2.44%	Semi-Annually	USD	3,700,000	$	469,530	$	184,971	$	284,559
Put
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	2.94%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	USD	56,100,000	$	1,548,921	$	2,804,609	$	(1,255,688	)
									$	2,018,451	$	2,989,580	$	(971,129	)

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount			Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Long Bond	12/21/20		113	$	19,931,978		$	(12,197	)
U.S. Treasury Ultra Bond	12/21/20		256		57,513,893			(729,893	)
U.S. Treasury Note 2 Year	12/31/20		705		155,717,919			59,542
U.S. Treasury Note 5 Year	12/31/20		315		39,675,488			24,356
							$	(658,192	)
Short
90 Day Eurodollar	12/14/20		10	$	(2,437,842	)	$	(56,033	)
U.S. Treasury Ultra 10 Year	12/21/20		72		(11,484,687	)		(29,688	)
90 Day Eurodollar	3/15/21		9		(2,194,846	)		(50,767	)
90 Day Eurodollar	9/13/21		17		(4,146,456	)		(95,469	)
90 Day Eurodollar	3/14/22		15		(3,657,513	)		(84,237	)
90 Day Eurodollar	9/19/22		14		(3,412,278	)		(79,322	)
90 Day Eurodollar	3/13/23		12		(2,923,010	)		(68,590	)
90 Day Eurodollar	12/18/23		15		(3,650,388	)		(84,987	)
90 Day Eurodollar	12/16/24		40		(9,722,367	)		(219,133	)
							$	(768,226	)

Centrally Cleared Credit Default Swaps - Buy Protection
Reference Obligation/Index	Rate Paid by Fund	Payment Frequency	Termination Date	Notional Amount		Value			Upfront Premium Paid/ (Received)			Unrealized Appreciation (Depreciation)
CDX.NA.IG Series 35†	1.000%	Quarterly	12/20/2025	USD	4,000,000	$	(83,364	)	$	(98,006	)	$	14,642
CDX.NA.IG Series 35†	1.000%	Quarterly	12/20/2025	USD	5,000,000		(104,205	)		(119,481	)		15,276
						$	(187,569	)	$	(217,487	)	$	29,918

† Payment is based on a percentage of the index. Reference entities are a number of individual issuers comprising the index.

Currency Legend

USD U.S. Dollar

MML Short-Duration Bond Fund —  Portfolio of Investments

September 30, 2020 (Unaudited)

	Principal Amount		Value
Bonds & Notes — 92.3%
Corporate Debt — 39.0%
Agriculture — 1.5%
BAT Capital Corp.
3.222% 8/15/24	$	415,000	$	444,016
Bunge Ltd. Finance Corp.
1.630% 8/17/25		140,000		140,612
3.500% 11/24/20		930,000		934,071
Imperial Brands Finance PLC
3.125% 7/26/24 (a)		400,000		422,989
3.500% 2/11/23 (a)		387,000		404,841
Reynolds American, Inc.
4.450% 6/12/25		505,000		568,296
				2,914,825
Airlines — 0.1%
American Airlines Pass-Through Trust, Series 2014-1, Class B,
4.375% 4/01/24		20,383		14,435
Delta Air Lines, Inc. / SkyMiles IP Ltd.
4.500% 10/20/25 (a)		185,000		189,968
				204,403
Auto Manufacturers — 1.7%
Ford Motor Credit Co. LLC
3 mo. USD LIBOR + .810% 1.114% FRN 4/05/21		405,000		399,079
3 mo. USD LIBOR + 1.235% 1.515% FRN 2/15/23		275,000		253,052
3.087% 1/09/23		260,000		254,771
3.350% 11/01/22		365,000		359,525
General Motors Financial Co., Inc.
3.250% 1/05/23		970,000		1,002,482
Hyundai Capital America
2.375% 2/10/23 (a)		600,000		615,985
2.850% 11/01/22 (a)		320,000		330,918
Nissan Motor Acceptance Corp.
1.900% 9/14/21 (a)		200,000		200,812
				3,416,624
Banks — 8.8%
ABN AMRO Bank NV
4.750% 7/28/25 (a)		435,000		489,853
Banco Santander SA
2.746% 5/28/25		200,000		209,791
3.500% 4/11/22		600,000		622,366
Bank of America Corp. 3 mo. USD LIBOR + .930%
2.816% VRN 7/21/23		1,910,000		1,983,772
The Bank of Nova Scotia
4.500% 12/16/25		420,000		486,521
Barclays Bank PLC
10.179% 6/12/21 (a)		504,000		530,263

MML Short-Duration Bond Fund —  Portfolio of Investments (Continued)
	Principal Amount		Value
Barclays PLC 3 mo. USD LIBOR + 1.380%
1.660% FRN 5/16/24	$	485,000	$	486,321
BPCE SA
5.700% 10/22/23 (a)		825,000		925,232
Citigroup, Inc.
4.400% 6/10/25		835,000		942,137
Credit Suisse AG
6.500% 8/08/23 (a)		930,000		1,053,225
Danske Bank A/S
5.000% 1/12/22 (a)		455,000		478,000
Deutsche Bank AG SOFR + 2.159%
2.222% VRN 9/18/24		685,000		689,761
Discover Bank
3.350% 2/06/23		673,000		711,779
4.200% 8/08/23		310,000		339,413
First Horizon National Corp.
3.500% 12/15/20		520,000		521,767
The Goldman Sachs Group, Inc.
4.250% 10/21/25		1,845,000		2,099,059
HSBC Holdings PLC
4.250% 3/14/24		865,000		927,595
Mitsubishi UFJ Financial Group, Inc.
2.665% 7/25/22		820,000		850,093
Morgan Stanley
SOFR + 1.990% 2.188% VRN 4/28/26		425,000		445,096
4.100% 5/22/23		424,000		459,264
Sumitomo Mitsui Financial Group, Inc.
1.474% 7/08/25		335,000		341,161
2.448% 9/27/24		520,000		549,357
3.748% 7/19/23		151,000		163,621
Synchrony Bank
3.000% 6/15/22		470,000		485,032
UBS Group AG
4.125% 9/24/25 (a)		355,000		404,374
				17,194,853
Beverages — 0.9%
Bacardi Ltd.
4.450% 5/15/25 (a)		778,000		868,988
Molson Coors Beverage Co.
2.100% 7/15/21		230,000		232,752
3.000% 7/15/26		505,000		538,391
3.500% 5/01/22		197,000		204,819
				1,844,950
Chemicals — 1.5%
DuPont de Nemours, Inc.
4.493% 11/15/25		705,000		812,625
Huntsman International LLC
5.125% 11/15/22		716,000		769,914
Nutrition & Biosciences, Inc.
1.230% 10/01/25 (a)		360,000		359,098
RPM International, Inc.
3.450% 11/15/22		8,000		8,290
Syngenta Finance NV
4.441% 4/24/23 (a)		570,000		602,000

MML Short-Duration Bond Fund —  Portfolio of Investments (Continued)
	Principal Amount		Value
4.892% 4/24/25 (a)	$	335,000	$	363,209
				2,915,136
Computers — 1.2%
Dell International LLC / EMC Corp.
4.000% 7/15/24 (a)		414,000		447,029
5.850% 7/15/25 (a)		432,000		503,363
Genpact Luxembourg Sarl
3.375% 12/01/24		335,000		350,808
3.700% STEP 4/01/22		635,000		650,077
Leidos, Inc.
2.950% 5/15/23 (a)		390,000		407,971
				2,359,248
Diversified Financial Services — 3.6%
AerCap Ireland Capital DAC / AerCap Global Aviation Trust
2.875% 8/14/24		1,025,000		987,219
4.500% 9/15/23		255,000		262,790
Aircastle Ltd.
5.000% 4/01/23		1,010,000		1,012,276
Antares Holdings LP
6.000% 8/15/23 (a)		473,000		478,325
Avolon Holdings Funding Ltd.
2.875% 2/15/25 (a)		335,000		307,062
BGC Partners, Inc.
4.375% 12/15/25 (a)		350,000		357,075
Brookfield Finance, Inc.
4.000% 4/01/24		580,000		638,474
Lazard Group LLC
3.750% 2/13/25		805,000		872,591
LeasePlan Corp. NV
2.875% 10/24/24 (a)		280,000		288,965
Park Aerospace Holdings Ltd.
5.250% 8/15/22 (a)		1,250,000		1,255,057
Synchrony Financial
2.850% 7/25/22		605,000		622,635
				7,082,469
Electric — 0.7%
Enel Finance International NV
2.875% 5/25/22 (a)		285,000		294,083
Entergy Texas, Inc.
2.550% 6/01/21		95,000		96,257
Pacific Gas and Electric Co.
1.750% 6/16/22		640,000		640,769
Puget Energy, Inc.
6.000% 9/01/21		260,000		272,463
				1,303,572
Gas — 0.3%
NiSource, Inc.
0.950% 8/15/25		670,000		669,298
Housewares — 0.5%
Newell Brands, Inc.
4.350% STEP 4/01/23		979,000		1,023,329

MML Short-Duration Bond Fund —  Portfolio of Investments (Continued)
	Principal Amount		Value
Insurance — 2.9%
AmTrust Financial Services, Inc.
6.125% 8/15/23	$	620,000	$	574,863
Athene Global Funding
2.750% 6/25/24 (a)		1,020,000		1,063,549
CNO Financial Group, Inc.
5.250% 5/30/25		685,000		785,670
Enstar Group Ltd.
4.500% 3/10/22		685,000		713,667
Equitable Holdings, Inc.
3.900% 4/20/23		87,000		93,536
Jackson National Life Global Funding
2.500% 6/27/22 (a)		495,000		511,345
Lincoln National Corp.
4.000% 9/01/23		122,000		133,188
Trinity Acquisition PLC
3.500% 9/15/21		600,000		614,788
Unum Group
3.875% 11/05/25		620,000		673,829
4.500% 3/15/25		265,000		294,357
Willis Towers Watson PLC
5.750% 3/15/21		190,000		194,245
				5,653,037
Investment Companies — 1.4%
Ares Capital Corp.
4.200% 6/10/24		953,000		992,738
BlackRock TCP Capital Corp.
3.900% 8/23/24		360,000		365,767
4.125% 8/11/22		675,000		684,607
Sixth Street Specialty Lending, Inc.
3.875% 11/01/24		655,000		663,548
				2,706,660
Iron & Steel — 0.4%
Reliance Steel & Aluminum Co.
1.300% 8/15/25		355,000		354,561
Steel Dynamics, Inc.
2.400% 6/15/25		165,000		172,156
2.800% 12/15/24		250,000		263,732
				790,449
Lodging — 0.6%
Las Vegas Sands Corp.
3.200% 8/08/24		1,025,000		1,036,141
Marriott International, Inc. /MD
5.750% 5/01/25		161,000		179,679
				1,215,820
Machinery – Diversified — 0.4%
CNH Industrial Capital LLC
1.950% 7/02/23		120,000		122,250
3.875% 10/15/21		635,000		652,279
				774,529

MML Short-Duration Bond Fund —  Portfolio of Investments (Continued)
	Principal Amount		Value
Media — 1.0%
Sirius XM Radio, Inc.
3.875% 8/01/22 (a)	$	1,047,000	$	1,058,124
ViacomCBS, Inc.
4.750% 5/15/25		840,000		965,070
				2,023,194
Mining — 0.9%
Glencore Finance Canada Ltd.
4.250% STEP 10/25/22 (a)		254,000		269,683
Glencore Funding LLC
4.125% 5/30/23 (a)		360,000		385,952
Kinross Gold Corp.
5.125% 9/01/21		370,000		380,718
5.950% 3/15/24		550,000		627,268
				1,663,621
Oil & Gas — 1.3%
Continental Resources, Inc.
5.000% 9/15/22		390,000		387,106
EQT Corp.
3.000% 10/01/22		565,000		551,581
7.875% STEP 2/01/25		320,000		354,704
Newfield Exploration Co.
5.625% 7/01/24		505,000		489,876
Petroleos Mexicanos
4.625% 9/21/23		495,000		490,721
Valero Energy Corp.
2.700% 4/15/23		179,000		185,458
				2,459,446
Packaging & Containers — 0.4%
Graphic Packaging International LLC
4.750% 4/15/21		759,000		764,692
Pharmaceuticals — 1.1%
AbbVie, Inc.
3.800% 3/15/25 (a)		495,000		548,877
Cardinal Health, Inc. 3 mo. USD LIBOR + .770%
1.020% FRN 6/15/22		590,000		593,570
Mylan, Inc.
3.125% 1/15/23 (a)		525,000		552,267
Teva Pharmaceutical Finance Netherlands III BV
2.200% 7/21/21		240,000		237,720
Upjohn, Inc.
1.650% 6/22/25 (a)		190,000		194,492
				2,126,926
Pipelines — 1.7%
Energy Transfer Operating LP
4.200% 9/15/23		960,000		1,013,234
EnLink Midstream Partners LP
4.400% 4/01/24		490,000		441,000
EQM Midstream Partners LP
4.750% 7/15/23		505,000		504,015

MML Short-Duration Bond Fund —  Portfolio of Investments (Continued)
	Principal Amount		Value
MPLX LP 3 mo. USD LIBOR + 1.100%
1.342% FRN 9/09/22	$	1,050,000	$	1,050,042
Plains All American Pipeline LP/PAA Finance Corp.
3.850% 10/15/23		384,000		401,898
				3,410,189
Private Equity — 0.3%
Hercules Capital, Inc.
4.625% 10/23/22		610,000		617,500
Real Estate Investment Trusts (REITS) — 2.6%
CubeSmart LP
4.375% 12/15/23		313,000		343,934
Essex Portfolio LP
3.500% 4/01/25		130,000		142,789
3.875% 5/01/24		170,000		185,871
Host Hotels & Resorts LP
3.750% 10/15/23		950,000		980,094
SBA Tower Trust
1.884% 7/15/50 (a)		287,000		293,374
2.836% 1/15/50 (a)		1,450,000		1,551,838
Service Properties Trust
4.350% 10/01/24		510,000		461,550
Tanger Properties LP
3.875% 12/01/23		610,000		613,485
VEREIT Operating Partnership LP
4.600% 2/06/24		570,000		611,496
				5,184,431
Retail — 1.1%
O'Reilly Automotive, Inc.
3.800% 9/01/22		123,000		129,611
3.850% 6/15/23		873,000		937,423
QVC, Inc.
4.375% 3/15/23		1,060,000		1,099,088
				2,166,122
Semiconductors — 0.2%
Microchip Technology, Inc.
3.922% 6/01/21		390,000		398,632
Telecommunications — 1.0%
Qwest Corp
6.750% 12/01/21		485,000		512,184
Sprint Communications, Inc.
9.250% 4/15/22		330,000		366,125
T-Mobile USA, Inc.
1.500% 2/15/26 (a)		430,000		433,320
Telefonaktiebolaget LM Ericsson
4.125% 5/15/22		628,000		654,593
				1,966,222
Transportation — 0.4%
Ryder System, Inc.
3.400% 3/01/23		175,000		185,638

MML Short-Duration Bond Fund —  Portfolio of Investments (Continued)
	Principal Amount		Value
3.750% 6/09/23	$	482,000	$	518,106
				703,744
Trucking & Leasing — 0.5%
Penske Truck Leasing Co. LP/PTL Finance Corp.
4.875% 7/11/22 (a)		816,000		876,934
TOTAL CORPORATE DEBT (Cost $74,690,998)				76,430,855
Municipal Obligations — 0.2%
Louisiana State Public Facilities Authority, Revenue Bonds, Series 2011-A, Class A2, 3 mo. USD LIBOR
1.168% FRN 4/26/27		10,467		10,476
Pennsylvania Higher Education Assistance Agency, Revenue Bonds, Series 2006-2, Class B, 28 day ARS
1.655% FRN 10/25/42		450,000		446,634
TOTAL MUNICIPAL OBLIGATIONS (Cost $454,280)				457,110
Non-U.S. Government Agency Obligations — 50.7%
Auto Floor Plan Asset-Backed Securities — 0.2%
Navistar Financial Dealer Note Master Owner Trust II
Series 2019-1, Class C, 1 mo. USD LIBOR + .950% 1.098% FRN 5/25/24 (a)		236,000		234,771
Series 2019-1, Class D, 1 mo. USD LIBOR + 1.450% 1.598% FRN 5/25/24 (a)		214,000		212,806
				447,577
Automobile Asset-Backed Securities — 6.4%
AmeriCredit Automobile Receivables Trust
Series 2020-1, Class D, 1.800% 12/18/25		947,000		954,218
Series 2019-3, Class D, 2.580% 9/18/25		588,000		602,920
Avis Budget Rental Car Funding AESOP LLC
Series 2020-1A, Class C, 3.020% 8/20/26 (a)		1,259,000		1,226,723
Series 2019-3A, Class C, 3.150% 3/20/26 (a)		1,083,000		1,063,813
Series 2019-1A, Class C, 4.530% 3/20/23 (a)		233,000		235,943
Series 2018-1A, Class C, 4.730% 9/20/24 (a)		500,000		517,195
Canadian Pacer Auto Receivables Trust, Series 2018-2A, Class B
3.630% 1/19/24 (a)		180,000		183,661
Carmax Auto Owner Trust, Series 2019-4, Class D
2.800% 4/15/26		560,000		565,044
Carvana Auto Receivables Trust, Series 2019-4A, Class D
3.070% 7/15/25 (a)		719,000		739,695
Drive Auto Receivables Trust, Series 2019-4, Class D
2.700% 2/16/27		550,000		563,073
Exeter Automobile Receivables Trust, Series 2019-3A, Class D
3.110% 8/15/25 (a)		400,000		412,708
Hertz Fleet Lease Funding LP, Series 2019-1, Class D
3.440% 1/10/33 (a)		649,000		620,377
Hertz Vehicle Financing II LP
Series 2019-3A, Class B, 3.030% 12/26/25 (a)		410,000		408,156
Series 2017-1A, Class B, 3.560% 10/25/21 (a)		910,000		902,384
Hertz Vehicle Financing LLC, Series 2018-3A, Class B
4.370% 7/25/24 (a)		330,000		326,713

MML Short-Duration Bond Fund —  Portfolio of Investments (Continued)
	Principal Amount		Value
Hertz Vehicle Financing LP, Series 2016-2A, Class C
4.990% 3/25/22 (a)	$	1,800,000	$	1,738,725
Oscar US Funding X LLC, Series 2019-1A, Class A4
3.270% 5/11/26 (a)		500,000		527,725
Santander Revolving Auto Loan Trust
Series 2019-A, Class B, 2.800% 1/26/32 (a)		170,000		178,870
Series 2019-A, Class C, 3.000% 1/26/32 (a)		101,000		102,259
Series 2019-A, Class D, 3.450% 1/26/32 (a)		215,000		214,224
Tesla Auto Lease Trust, Series 2020-A, Class C
1.680% 2/20/24 (a)		456,000		460,641
				12,545,067
Commercial Mortgage-Backed Securities — 5.0%
BAMLL Commercial Mortgage Securities Trust
Series 2018-DSNY, Class C, 1 mo. USD LIBOR + 1.350% 1.502% FRN 9/15/34 (a)		130,000		121,553
Series 2019-BPR, Class CMP, 4.024% VRN 11/05/32 (a) (b)		370,000		333,447
Series 2019-BPR, Class DMP, 4.024% VRN 11/05/32 (a) (b)		450,000		363,881
BHMS Mortgage Trust
Series 2018-ATLS, Class A, 1 mo. USD LIBOR + 1.250% 1.402% FRN 7/15/35 (a)		770,000		736,325
Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500% 1.652% FRN 7/15/35 (a)		950,000		881,149
BX Commercial Mortgage Trust
Series 2018-IND, Class C, 1 mo. USD LIBOR + 1.100% 1.252% FRN 11/15/35 (a)		759,500		755,761
Series 2020-BXLP, Class D, 1 mo. USD LIBOR + 1.250% 1.402% FRN 12/15/36 (a)		649,406		643,362
Series 2020-BXLP, Class E, 1 mo. USD LIBOR + 1.600% 1.752% FRN 12/15/36 (a)		766,299		757,250
Series 2018-IND, Class E, 1 mo. USD LIBOR + 1.700% 1.852% FRN 11/15/35 (a)		728,000		722,135
Series 2019-XL, Class E, 1 mo. USD LIBOR + 1.800% 1.952% FRN 10/15/36 (a)		299,978		297,187
Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000% 2.152% FRN 10/15/36 (a)		841,078		831,148
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class E, 1 mo. USD LIBOR + 2.150%
2.302% FRN 12/15/37 (a)		545,194		538,413
Commercial Mortgage Trust
Series 2014-CR14, Class A2, 3.147% 2/10/47		90,050		90,062
Series 2015-DC1, Class AM, 3.724% 2/10/48		480,000		518,460
Series 2015-DC1, Class B, 4.035% VRN 2/10/48  (b)		333,000		343,865
Credit Suisse Mortgage Capital Certificates, Series 2019-ICE4, Class D, 1 mo. USD LIBOR + 1.600%
1.752% FRN 5/15/36 (a)		200,000		198,000
Hudson Yards Mortgage Trust, Series 2019-30HY, Class E,
3.558% VRN 7/10/39 (a) (b)		700,000		684,495
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800%
1.952% FRN 5/15/36 (a)		251,000		248,256
Morgan Stanley Bank of America Merrill Lynch Trust, Series 2013-C7, Class B
3.769% 2/15/46		250,000		248,896
Morgan Stanley Capital I Trust, Series 2012-STAR, Class D
4.057% 8/05/34 (a)		400,000		387,518

MML Short-Duration Bond Fund —  Portfolio of Investments (Continued)
	Principal Amount		Value
MSCG Trust, Series 2018-SELF, Class C, 1 mo. USD LIBOR + 1.180%
1.332% FRN 10/15/37 (a)	$	90,000	$	88,923
				9,790,086
Home Equity Asset-Backed Securities — 0.0%
Credit Suisse Seasoned Loan Trust, Series 2006-1, Class A, 1 mo. USD LIBOR + .240%
0.388% FRN 10/25/34 (a)		56,785		56,315
Other Asset-Backed Securities — 23.1%
321 Henderson Receivables I LLC, Series 2006-1A, Class A1, 1 mo. USD LIBOR + .200%
0.352% FRN 3/15/41 (a)		26,604		26,173
321 Henderson Receivables I LLC, Series 2010-3A, Class A
3.820% 12/15/48 (a)		159,782		166,754
AASET Trust
Series 2017-1A, Class A, 3.967% 5/16/42 (a)		142,463		128,796
Series 2018-2A, Class A, 4.454% 11/18/38 (a)		643,463		598,464
Adams Outdoor Advertising LP, Series 2018-1, Class A
4.810% 11/15/48 (a)		385,935		401,557
Affirm Asset Securitization Trust
Series 2020-A, Class A, 2.100% 2/18/25 (a)		1,235,000		1,237,323
Series 2020-Z1, Class A, 3.460% 10/15/24 (a)		423,699		426,487
American Tower Trust #1, Series 13, Class 2A
3.070% 3/15/48 (a)		500,000		511,053
Ares LV CLO Ltd., Series 2020-55A, Class A1, 3 mo. USD LIBOR + 1.700%
2.011% FRN 4/15/31 (a)		500,000		501,505
Ascentium Equipment Receivables Trust, Series 2019-2A, Class E
3.780% 5/10/27 (a)		669,000		670,381
Avant Loans Funding Trust, Series 2019-A, Class A
3.480% 7/15/22 (a)		27,446		27,455
Bain Capital Credit CLO Ltd.
Series 2016-2A, Class BR, 3 mo. USD LIBOR + 1.800% 2.075% FRN 1/15/29 (a)		750,000		746,079
Series 2020-2A, Class A, 3 mo. USD LIBOR + 1.850% 2.211% FRN 7/21/31 (a)		500,000		501,081
Benefit Street Partners CLO X Ltd., Series 2016-10A, Class A2R, 3 mo. USD LIBOR + 1.750%
2.025% FRN 1/15/29 (a)		500,000		493,570
BRE Grand Islander Timeshare Issuer LLC
Series 2017-1A, Class A, 2.940% 5/25/29 (a)		98,440		98,885
Series 2019-A, Class B, 3.780% 9/26/33 (a)		276,339		273,320
CAL Funding II Ltd., Series 2018-2A, Class A
4.340% 9/25/43 (a)		232,000		230,057
Capital Automotive REIT
Series 2017-1A, Class A1, 3.870% 4/15/47 (a)		244,038		244,485
Series 2017-1A, Class A2, 4.180% 4/15/47 (a)		610,095		612,009
CARS-DB4 LP, Series 2020-1A, Class B1
4.170% 2/15/50 (a)		484,000		499,433
Castlelake Aircraft Structured Trust, Series 2018-1, Class A
4.125% 6/15/43 (a)		290,666		271,357
Cbam CLO Management Cbam, Series 2018-6A, Class A1R, 3 mo. USD LIBOR + 1.270%
1.545% FRN 1/15/31 (a)		500,000		497,214
CF Hippolyta LLC
Series 2020-1, Class A1, 1.690% 7/15/60 (a)		250,000		252,825
Series 2020-1, Class B1, 2.280% 7/15/60 (a)		101,000		102,764

MML Short-Duration Bond Fund —  Portfolio of Investments (Continued)
	Principal Amount		Value
CIFC Funding IV Ltd., Series 2015-4A, Class A2R,
2.122% FRN 10/20/27 (a) (b)	$	300,000	$	299,522
CNH Equipment Trust, Series 2020-A, Class B
2.300% 10/15/27		235,000		245,659
DB Master Finance LLC
Series 2019-1A, Class A2I, 3.787% 5/20/49 (a)		273,240		280,550
Series 2019-1A, Class A2II, 4.021% 5/20/49 (a)		322,740		341,345
Diamond Resorts Owner Trust
Series 2019-1A, Class A, 2.890% 2/20/32 (a)		413,984		420,972
Series 2018-1, Class A, 3.700% 1/21/31 (a)		150,943		154,209
Domino's Pizza Master Issuer LLC
Series 2017-1A, Class A2II, 3.082% 7/25/47 (a)		340,375		340,741
Series 2018-1A, Class A2I, 4.116% 7/25/48 (a)		352,800		372,820
Elara HGV Timeshare Issuer LLC
Series 2017-A, Class A, 2.690% 3/25/30 (a)		106,549		106,193
Series 2016-A, Class A, 2.730% 4/25/28 (a)		194,797		193,964
Series 2017-A, Class B, 2.960% 3/25/30 (a)		315,701		310,234
Series 2014-A, Class B, 3.020% VRN 2/25/27 (a) (b)		25,013		24,977
Series 2019-A, Class C, 3.450% 1/25/34 (a)		657,609		645,947
Elmwood CLO Ltd., Series 2019-2A, Class A, 3 mo. USD LIBOR + 1.450%
1.722% FRN 4/20/31 (a)		350,000		350,135
FCI Funding  LLC, Series 2019-1A, Class A
3.630% 2/18/31 (a)		104,740		106,570
Global SC Finance II SRL, Series 2013-1A, Class A
2.980% 4/17/28 (a)		76,208		76,306
Goodgreen Trust
Series 2019-2A, Class A, 2.760% 10/15/54 (a)		575,139		582,881
Series 2016-1A, Class A, 3.230% 10/15/52 (a)		292,775		304,331
Series 2019-1A, Class A, 3.860% 10/15/54 (a)		285,956		302,817
Series 2018-1A, Class A, 3.930% VRN 10/15/53 (a) (b)		253,829		269,757
Hero Funding Trust
Series 2017-3A, Class A1, 3.190% 9/20/48 (a)		170,261		175,468
Series 2016-4A, Class A1, 3.570% 9/20/47 (a)		170,706		177,634
Series 2015-1A, Class A, 3.840% 9/21/40 (a)		352,702		370,833
Series 2018-1A, Class A2, 4.670% 9/20/48 (a)		309,740		332,371
Hilton Grand Vacations Trust
Series 2017-AA, Class A, 2.660% 12/26/28 (a)		1,126,123		1,150,646
Series 2017-AA, Class B, 2.960% 12/26/28 (a)		122,729		123,813
HIN Timeshare Trust, Series 2020-A, Class B
2.230% 10/09/39 (a)		1,027,000		1,027,995
Horizon Aircraft Finance I Ltd., Series 2018-1, Class A
4.458% 12/15/38 (a)		532,581		503,121
Horizon Aircraft Finance III Ltd, Series 2019-2, Class B
4.458% 11/15/39 (a)		683,333		515,179
KDAC Aviation Finance Ltd., Series 2017-1A, Class A
4.212% 12/15/42 (a)		190,448		167,285
KREF Ltd.
Series 2018-FL1, Class A, 1 mo. USD LIBOR + 1.100% 1.251% FRN 6/15/36 (a)		800,000		794,351
Series 2018-FL1, Class AS, 1 mo. USD LIBOR + 1.350% 1.501% FRN 6/15/36 (a)		1,150,000		1,139,326
Lendmark Funding Trust, Series 2018-1A, Class A
3.810% 12/21/26 (a)		350,000		356,565
Lunar Aircraft Ltd., Series 2020-1A, Class A
3.376% 2/15/45 (a)		175,127		162,232
MACH 1 Cayman Ltd., Series 2019-1, Class A
3.474% 10/15/39 (a)		373,211		339,460

MML Short-Duration Bond Fund —  Portfolio of Investments (Continued)
	Principal Amount		Value
Magnetite XXVI Ltd., Series 2020-26A, Class A, 3 mo. USD LIBOR + 1.750%
1.949% FRN 7/15/30 (a)	$	750,000	$	752,079
Mariner Finance Issuance Trust, Series 2018-AA, Class A
4.200% 11/20/30 (a)		903,000		907,664
Marlette Funding Trust
Series 2019-2A, Class A, 3.130% 7/16/29 (a)		65,196		65,892
Series 2019-2A, Class B, 3.530% 7/16/29 (a)		146,000		148,862
Mosaic Solar Loans LLC
Series 2018-2GS, Class A, 4.200% 2/22/44 (a)		229,463		244,115
Series 2017-1A, Class A, 4.450% 6/20/42 (a)		59,339		63,695
Neuberger Berman CLO Ltd., Series 2015-20A, Class BR, 3 mo. USD LIBOR + 1.250%
1.525% FRN 1/15/28 (a)		600,000		591,442
New Residential Advance Receivables Trust Advance Receivables Backed, Series 2019-T4, Class DT4
2.804% 10/15/51 (a)		714,000		713,995
NP SPE II LLC
Series 2019-1A, Class A1, 2.574% 9/20/49 (a)		203,677		202,260
Series 2017-1A, Class A1, 3.372% 10/21/47 (a)		135,252		138,129
OCP CLO Ltd., Series 2015-8A, Class A2AR, 3 mo. USD LIBOR + 1.450%
1.723% FRN 4/17/27 (a)		650,000		647,689
OneMain Financial Issuance Trust, Series 2019-2A, Class C
3.660% 10/14/36 (a)		600,000		627,040
Orange Lake Timeshare Trust
Series 2016-A, Class A, 2.610% 3/08/29 (a)		341,910		342,614
Series 2016-A, Class B, 2.910% 3/08/29 (a)		140,207		132,509
Series 2019-A, Class D, 4.930% 4/09/38 (a)		502,357		462,721
Oxford Finance Funding Trust
Series 2020-1A, Class A2, 3.101% 2/15/28 (a)		281,000		285,017
Series 2016-1A, Class A, 3.968% 6/17/24 (a)		24,436		24,445
Planet Fitness Master Issuer LLC, Series 2018-1A, Class A2I
4.262% 9/05/48 (a)		588,000		587,763
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850%
2.998% FRN 2/25/23 (a)		250,000		244,003
Recette CLO Ltd., Series 2015-1A, Class CR, 3 mo. USD LIBOR + 1.700%
1.972% FRN 10/20/27 (a)		250,000		248,386
Rockford Tower CLO Ltd., Series 2017-3A, Class A, 3 mo. USD LIBOR + 1.190%
1.462% FRN 10/20/30 (a)		1,000,000		990,419
RR 3 Ltd., Series 2018-3A, Class A1R2, 3 mo. USD LIBOR + 1.090%
1.365% FRN 1/15/30 (a)		400,000		395,810
SBA Tower Trust, Series 2014-2A, Class C,
3.869% STEP 10/15/49 (a)		430,000		452,747
Sierra Receivables Funding LLC
Series 2016-2A, Class B, 2.780% 7/20/33 (a)		89,880		89,606
Series 2017-1A, Class A, 2.910% 3/20/34 (a)		152,941		155,560
Series 2019-3A, Class C, 3.000% 8/20/36 (a)		350,397		345,373
Series 2015-3A, Class B, 3.080% 9/20/32 (a)		10,149		10,139
Series 2020-2A, Class C, 3.510% 7/20/37 (a)		117,895		119,022
Series 2018-1A, Class B, 4.236% 4/20/35		332,784		325,859
Series 2019-1A, Class D, 4.750% 1/20/36 (a)		282,640		272,872
SoFi Consumer Loan Program  Trust
Series 2016-1A, Class A, 3.260% 8/25/25 (a)		142,829		143,945
Series 2017-2, Class A, 3.280% 2/25/26 (a)		26,085		26,073
SoFi Consumer Loan Program Trust, Series 2019-3, Class D
3.890% 5/25/28 (a)		772,000		773,496

MML Short-Duration Bond Fund —  Portfolio of Investments (Continued)
	Principal Amount		Value
SpringCastle America Funding LLC, Series 2020-AA, Class A
1.970% 9/25/37 (a)	$	950,000	$	960,208
Stack Infrastructure Issuer LLC, Series 2020-1A, Class A2
1.893% 8/25/45 (a)		162,000		163,080
Store Master Funding I-VII, Series 2018-1A, Class A3
4.400% 10/20/48 (a)		515,017		526,183
Structured Asset Securities Corp. Mortgage Loan Trust, Series 2006-GEL1, Class M2, 1 mo. USD LIBOR + .800%
0.948% FRN 11/25/35 (a)		241,161		229,725
Taco Bell Funding LLC, Series 2018-1A, Class A2I
4.318% 11/25/48 (a)		982,500		1,003,377
TAL Advantage VII LLC, Series 2020-1A, Class B
3.290% 9/20/45 (a)		900,000		899,053
Tif Funding II LLC, Series 2020-1A, Class A
2.090% 8/20/45 (a)		118,256		118,062
TLF National Tax Lien Trust, Series 2017-1A, Class A
3.090% 12/15/29 (a)		337,362		339,587
Trafigura Securitisation Finance PLC
Series 2018-1A, Class A1, 1 mo. USD LIBOR + .730% 0.882% FRN 3/15/22 (a)		610,000		599,706
Series 2018-1A, Class B, 4.290% 3/15/22 (a)		920,000		917,468
Treman Park CLO Ltd., Series 2015-1A, Class ARR, 3 mo. USD LIBOR + 1.070%
1.342% FRN 10/20/28 (a)		1,000,000		993,488
Trinity Rail Leasing LP
Series 2018-1A, Class A1, 3.820% 6/17/48 (a)		464,572		465,597
Series 2019-1A, Class A, 3.820% 4/17/49 (a)		638,748		665,398
Trip Rail Master Funding LLC
Series 2017-1A, Class A1, 2.709% 8/15/47 (a)		49,742		49,786
Series 2011-1A, Class A2, 6.024% 7/15/41 (a)		668,991		695,714
Triton Container Finance VIII LLC, Series 2020-1A, Class A
2.110% 9/20/45 (a)		600,000		600,772
Vantage Data Centers LLC, Series 2020-1A, Class A2
1.645% 9/15/45 (a) (c)		675,000		675,000
VSE VOI Mortgage LLC, Series 2018-A, Class C
4.020% 2/20/36 (a)		160,084		149,747
Welk Resorts LLC
Series 2015-AA, Class A, 2.790% 6/16/31 (a)		34,032		33,892
Series 2017-AA, Class B, 3.410% 6/15/33 (a)		116,376		114,859
Westgate Resorts LLC
Series 2020-1A, Class A, 2.713% 3/20/34 (a)		416,610		425,910
Series 2017-1A, Class A, 3.050% 12/20/30 (a)		88,135		87,867
Series 2018-1A, Class A, 3.380% 12/20/31 (a)		188,129		186,893
Willis Engine Structured Trust IV, Series 2018-A, Class A,
4.750% STEP 9/15/43 (a)		225,699		190,364
				45,208,213
Student Loans Asset-Backed Securities — 8.9%
Access Group, Inc., Series 2015-1, Class B, 1 mo. USD LIBOR + 1.500%
1.648% FRN 7/25/58 (a)		140,000		123,627
College Avenue Student Loans LLC
Series 2018-A, Class A1, 1 mo. USD LIBOR + 1.200% 1.348% FRN 12/26/47 (a)		435,566		431,226
Series 2017-A, Class A1, FRN, 1 mo. USD LIBOR + 1.650% 1.798% FRN 11/26/46 (a)		357,733		358,850
Series 2017-A, Class B, 4.500% 11/26/46 (a)		700,000		717,224

MML Short-Duration Bond Fund —  Portfolio of Investments (Continued)
	Principal Amount		Value
College Loan Corp. Trust I, Series 2005-2, Class B, 3 mo. USD LIBOR + .490%
0.765% FRN 1/15/37	$	165,709	$	148,843
Commonbond Student Loan Trust
Series 2019-AGS, Class B, 3.040% 1/25/47 (a)		479,587		463,853
Series 2018-AGS, Class C, 3.820% 2/25/44 (a)		39,030		38,461
Series 2018-BGS, Class C, 4.120% 9/25/45 (a)		45,406		45,413
Series 2018-CGS, Class C, 4.350% 2/25/46 (a)		24,559		24,724
Series 2017-AGS, Class C, 5.280% 5/25/41 (a)		83,276		85,985
Credit Suisse ABS Repackaging Trust, Series 2013-A, Class B
2.500% 1/25/30 (a)		56,642		56,511
DRB Prime Student Loan Trust, Series 2016-R, Class A1, 1 mo. USD LIBOR + 1.900%
2.048% FRN 10/25/44 (a)		144,509		144,861
Earnest Student Loan Program LLC, Series 2016-B, Class A1, 1 mo. USD LIBOR + 2.050%
2.198% FRN 2/26/35 (a)		54,590		51,496
ECMC Group Student Loan Trust, Series 2018-2A, Class A, 1 mo. USD LIBOR + .800%
0.948% FRN 9/25/68 (a)		399,679		392,162
EdLinc Student Loan Funding, Series 2017-A, Class A, PRIME - 1.150%
3.600% FRN 12/01/47 (a)		338,987		334,982
ELFI Graduate Loan Program LLC, Series 2018-A, Class B
4.000% 8/25/42 (a)		194,218		192,922
Higher Education Funding I, Series 2004-1, Class B1, 28 day ARS
1.796% FRN 1/01/44 (a)		950,000		843,033
Laurel Road Prime Student Loan Trust
Series 2019-A, Class BFX, 3.000% 10/25/48 (a)		256,646		260,855
Series 2017-B, Class CFX, 3.610% 8/25/42 (a)		172,101		164,297
Series 2018-B, Class BFX, 3.720% 5/26/43 (a)		191,151		195,511
Navient Private Education Loan Trust, Series 2018-BA, Class A2B, 1 mo. USD LIBOR + .720%
0.872% FRN 12/15/59 (a)		155,899		149,265
Navient Private Education Refi Loan Trust, Series 2020-BA, Class B
2.770% 1/15/69 (a)		2,200,000		2,219,234
Navient Student Loan Trust
Series 2018-1A, Class A3, 1 mo. USD LIBOR + .720% 0.868% FRN 3/25/67 (a)		850,000		841,842
Series 2019-1A, Class A2, 1 mo. USD LIBOR + .900% 1.048% FRN 12/27/67 (a)		400,000		398,939
Series 2016-7A, Class A, 1 mo. USD LIBOR + 1.150% 1.298% FRN 3/25/66 (a)		701,420		701,420
Series 2016-5A, Class A, 1 mo. USD LIBOR + 1.250% 1.398% FRN 6/25/65 (a)		563,315		563,315
Nelnet Private Education Loan Trust
Series 2016-A, Class A1A, 1 mo. USD LIBOR + 1.750% 1.898% FRN 12/26/40 (a)		98,356		93,949
Series 2016-A, Class A1B, 3.600% 12/26/40 (a)		70,825		71,189
Nelnet Student Loan Trust
Series 2007-2A, Class A4A2, 28 day ARS 1.497% FRN 6/25/35 (a)		600,000		575,002
Series 2014-1A, Class B, 1 mo. USD LIBOR + 1.500% 1.648% FRN 10/25/47 (a)		270,000		253,585
Series 2015-3A, Class B, 1 mo. USD LIBOR + 1.500% 1.648% FRN 6/25/54 (a)		130,000		125,820
SLC Student Loan Trust, Series 2005-1, Class B, 3 mo. USD LIBOR + .200%
0.480% FRN 2/15/45		298,942		269,086
SLM Student Loan Trust
Series 2006-2, Class R, 0.000% 1/25/41		1,396		840,832

MML Short-Duration Bond Fund —  Portfolio of Investments (Continued)
	Principal Amount		Value
Series 2006-5, Class B, 3 mo. USD LIBOR + .210% 0.455% FRN 10/25/40	$	360,234	$	322,064
Series 2005-6, Class B, 3 mo. USD LIBOR + .290% 0.535% FRN 1/25/44		488,442		435,199
Series 2003-14, Class A6, 3 mo. USD LIBOR + .300% 0.545% FRN 7/25/25		87,589		85,585
Series 2005-9, Class B, 3 mo. USD LIBOR + .300% 0.545% FRN 1/25/41		366,476		328,633
Series 2005-8, Class B, 3 mo. USD LIBOR + .310% 0.555% FRN 1/25/55		144,310		128,296
Series 2006-7, Class B, 3 mo. USD LIBOR + .200% 1.191% FRN 1/27/42		901,701		797,937
SMB Private Education Loan Trust
Series 2018-C, Class A2B, 1 mo. USD LIBOR + .750% 0.902% FRN 11/15/35 (a)		455,940		449,621
Series 2019-A, Class A2B, 1 mo. USD LIBOR + .870% 1.022% FRN 7/15/36 (a)		504,000		497,641
Series 2019-B, Class A2B, 1 mo. USD LIBOR + 1.000% 1.152% FRN 6/15/37 (a)		500,000		499,170
Series 2016-C, Class A2B, 1 mo. USD LIBOR + 1.100% 1.252% FRN 9/15/34 (a)		167,427		166,911
Series 2014-A, Class A2B, 1 mo. USD LIBOR + 1.150% 1.302% FRN 5/15/26 (a)		132,604		132,897
Series 2016-B, Class A2B, 1 mo. USD LIBOR + 1.450% 1.602% FRN 2/17/32 (a)		73,579		73,911
SoFi Professional Loan Program LLC
Series 2017-D, Class R1, 0.000% 9/25/40 (a)		1,000,000		345,020
Series 2018-A, Class R1, 0.000% 2/25/42 (a)		1,000,000		413,442
Series 2018-D, Class R1, 0.000% 2/25/48 (a)		956,000		211,372
Series 2019-A, Class R1, 0.000% 6/15/48 (a)		1,314,800		311,476
Series 2016-D, Class A1, 1 mo. USD LIBOR + .950% 1.098% FRN 1/25/39 (a)		27,694		27,750
Series 2016-B, Class A1, 1 mo. USD LIBOR + 1.200% 1.348% FRN 6/25/33 (a)		49,819		49,978
				17,455,217
Whole Loan Collateral Collateralized Mortgage Obligations — 7.1%
Angel Oak Mortgage Trust
Series 2020-5, Class A2, 1.579% VRN 5/25/65 (a) (b)		429,457		428,882
Series 2020-5, Class A3, 2.041% VRN 5/25/65 (a) (b)		387,089		386,579
Series 2018-3, Class A3, 3.238% VRN 5/25/59 (a) (b)		250,814		253,398
Series 2019-6, Class M1, 3.389% VRN 11/25/59 (a) (b)		800,000		808,975
Bank of America Mortgage Securities, Series 2004-G, Class 2A7,
3.091% VRN 8/25/34  (b)		3,468		3,392
BRAVO Residential Funding Trust, Series 2020-NQM1, Class A3,
2.406% VRN 5/25/60 (a) (b)		415,414		414,737
CIM Trust, Series 2019-INV3, Class A11, 1 mo. USD LIBOR + 1.000%
1.125% FRN 8/25/49 (a)		1,220,667		1,220,619
Citigroup Mortgage Loan Trust
Series 2019-IMC1, Class A3, 3.030% VRN 7/25/49 (a) (b)		440,479		439,106
Series 2019-IMC1, Class M1, 3.170% VRN 7/25/49 (a) (b)		391,000		381,127
Countrywide Home Loans, Inc.
Series 2004-2, Class 1A1, 3.666% VRN 2/25/34  (b)		2,796		2,699
Series 2003-42, Class 1A1, 3.991% VRN 9/25/33  (b)		727		697
Deephaven Residential Mortgage Trust
Series 2018-1A, Class A2, 3.027% VRN 12/25/57 (a) (b)		148,743		149,749
Series 2019-4A, Class M1, 3.484% VRN 10/25/59 (a) (b)		550,000		555,016
Series 2018-2A, Class A3, 3.684% VRN 4/25/58 (a) (b)		346,132		348,680
Series 2018-3A, Class A3, 3.963% VRN 8/25/58 (a) (b)		254,021		256,953
Series 2018-4A, Class A3, 4.285% VRN 10/25/58 (a) (b)		368,559		372,258
GSR Mortgage Loan Trust, Series 2004-9, Class 2A1,
3.490% VRN 8/25/34  (b)		1,057		1,067
Homeward Opportunities Fund I Trust, Series 2020-2, Class A1,
1.657% VRN 5/25/65 (a) (b)		392,241		393,985

MML Short-Duration Bond Fund —  Portfolio of Investments (Continued)
	Principal Amount		Value
IndyMac Index Mortgage Loan Trust, Series 2004-AR4, Class 1A,
3.165% VRN 8/25/34  (b)	$	6,528	$	6,509
JP Morgan Mortgage Trust
Series 2018-1, Class A5, 3.500% VRN 6/25/48 (a) (b)		145,998		146,287
Series 2018-3, Class A5, 3.500% VRN 9/25/48 (a) (b)		272,197		274,079
Series 2018-4, Class A15, 3.500% VRN 10/25/48 (a) (b)		100,957		101,175
Series 2017-6, Class A5, 3.500% VRN 12/25/48 (a) (b)		174,655		176,719
Merrill Lynch Mortgage Investors, Inc.
Series 2003-A4, Class IA, 3.032% VRN 7/25/33  (b)		352		336
Series 2004-A1, Class IA, 3.250% VRN 2/25/34  (b)		355		351
New Residential Mortgage Loan Trust
Series 2016-4A, Class A1, 3.750% VRN 11/25/56 (a) (b)		225,527		240,636
Series 2019-NQM2, Class A3, 3.752% VRN 4/25/49 (a) (b)		153,052		155,416
Series 2019-NQM1, Class A3, 3.928% VRN 1/25/49 (a) (b)		364,675		370,972
Onslow Bay Financial LLC, Series 2020-INV1, Class A21,
3.500% VRN 12/25/49 (a) (b)		602,476		614,204
PSMC Trust
Series 2018-1, Class A3, 3.500% VRN 2/25/48 (a) (b)		199,699		201,842
Series 2018-2, Class A3, 3.500% VRN 6/25/48 (a) (b)		160,745		161,680
Sequoia Mortgage Trust
Series 2018-3, Class A4, 3.500% VRN 3/25/48 (a) (b)		275,682		276,501
Series 2018-5, Class A4, 3.500% VRN 5/25/48 (a) (b)		150,990		151,961
Series 2018-CH1, Class A10, 4.000% VRN 2/25/48 (a) (b)		111,666		112,563
Series 2018-CH2, Class A12, 4.000% VRN 6/25/48 (a) (b)		295,025		298,558
Series 2018-CH3, Class A11, 4.000% VRN 8/25/48 (a) (b)		117,578		118,213
Series 2018-7, Class A4, 4.000% VRN 9/25/48 (a) (b)		16,480		16,458
Series 2019-1, Class A4, 4.000% VRN 2/25/49 (a) (b)		7,153		7,139
Shellpoint Co-Originator Trust, Series 2016-1, Class 2A3,
3.000% VRN 10/25/31 (a) (b)		397,827		405,730
Starwood Mortgage Residential Trust, Series 2019-INV1, Class A3,
2.916% VRN 9/27/49 (a) (b)		532,984		540,149
Structured Adjustable Rate Mortgage Loan Trust, Series 2004-2, Class 2A,
2.970% VRN 3/25/34  (b)		2,953		2,931
TIAA Bank Mortgage Loan Trust, Series 2018-2, Class A4,
3.500% VRN 7/25/48 (a) (b)		87,826		87,947
Verus Securitization Trust
Series 2020-1, Class M1, 3.021% VRN 1/25/60 (a) (b)		1,034,000		1,029,256
Series 2019-4, Class M1, 3.207% VRN 11/25/59 (a) (b)		430,000		423,699
Series 2019-INV2, Class A3, 3.219% VRN 7/25/59 (a) (b)		813,605		831,059
Series 2019-INV3, Class M1, 3.279% VRN 11/25/59 (a) (b)		265,000		265,728
Series 2020-4, Class M1, 3.291% VRN 5/25/65 (a) (b)		548,000		546,650
Washington Mutual Mortgage Pass-Through Certificates, Series 2004-AR2, Class A, 12 mo. MTA + 1.400%
2.419% FRN 4/25/44		8,701		8,321
				13,990,988
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $100,546,255)				99,493,463
U.S. Government Agency Obligations and Instrumentalities — 1.7%
Collateralized Mortgage Obligations — 0.1%
Government National Mortgage Association     Series 2014-131, Class BW 2.868% FRN 5/20/41 (b)		77,749		80,236
Pass-Through Securities — 0.0%
Federal Home Loan Mortgage Corp.
Pool #C01079 7.500% 10/01/30		198		233

MML Short-Duration Bond Fund —  Portfolio of Investments (Continued)
	Principal Amount		Value
Pool #C01135 7.500% 2/01/31	$	779	$	908
Federal National Mortgage Association
Pool #775539 12 mo. USD LIBOR + 1.641% 2.516% FRN 5/01/34		2,642		2,751
Pool #725692 1 year CMT + 2.137% 3.138% FRN 10/01/33		11,523		12,070
Pool #888586 1 year CMT + 2.196% 3.326% FRN 10/01/34		14,475		15,254
Pool #575667 7.000% 3/01/31		1,333		1,581
Pool #529453 7.500% 1/01/30		443		520
Pool #535996 7.500% 6/01/31		714		836
Pool #252926 8.000% 12/01/29		13		15
Pool #532819 8.000% 3/01/30		26		31
Pool #534703 8.000% 5/01/30		443		516
Pool #253437 8.000% 9/01/30		20		23
Pool #253481 8.000% 10/01/30		9		10
Pool #602008 8.000% 8/01/31		627		734
Pool #190317 8.000% 8/01/31		434		508
Pool #597220 8.000% 9/01/31		551		650
Government National Mortgage Association I
Pool #371146 7.000% 9/15/23		31		32
Pool #352022 7.000% 11/15/23		448		474
Pool #491089 7.000% 12/15/28		1,233		1,345
Pool #500928 7.000% 5/15/29		570		654
Pool #499410 7.000% 7/15/29		210		242
Pool #510083 7.000% 7/15/29		144		164
Pool #493723 7.000% 8/15/29		422		486
Pool #581417 7.000% 7/15/32		841		959
Government National Mortgage Association II
Pool #008746 1 year CMT + 1.500% 3.125% FRN 11/20/25		506		517
Pool #080136 1 year CMT + 1.500% 3.125% FRN 11/20/27		107		110
				41,623
Whole Loans — 1.6%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes
Series 2020-DNA3, Class M1, 1 mo. USD LIBOR + 1.500% 1.648% FRN 6/25/50 (a)		490,000		490,824
Series 2020-DNA3, Class M2, 1 mo. USD LIBOR + 3.000% 3.148% FRN 6/25/50 (a)		1,436,000		1,440,010
Federal National Mortgage Association Connecticut Avenue Securities Trust
Series 2019-R03, Class 1M2, 1 mo. USD LIBOR + 2.150% 2.298% FRN 9/25/31 (a)		369,143		368,172
Series 2019-R02, Class 1M2, 1 mo. USD LIBOR + 2.300% 2.448% FRN 8/25/31 (a)		838,220		832,994
				3,132,000
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $3,263,441)				3,253,859
U.S. Treasury Obligations — 0.7%
U.S. Treasury Bonds & Notes — 0.7%
U.S. Treasury Note
8.000% 11/15/21 (d)		1,220,000		1,327,438
TOTAL U.S. TREASURY OBLIGATIONS (Cost $1,395,661)				1,327,438
TOTAL BONDS & NOTES (Cost $180,350,635)				180,962,725
TOTAL PURCHASED OPTIONS (#) — 0.0% (Cost $147,532)				76,230
TOTAL LONG-TERM INVESTMENTS (Cost $180,498,167)				181,038,955

MML Short-Duration Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Short-Term Investments — 6.1%
Commercial Paper — 5.1%
American Honda Finance Corp.
0.315% 11/19/20	$	1,000,000	$	999,643
Avangrid, Inc.
0.254% 11/09/20 (a)		1,000,000		999,781
Duke Energy Corp.
0.223% 10/02/20 (a)		2,000,000		1,999,990
Harley-Davidson Funding Corp.
0.254% 10/08/20 (a)		1,000,000		999,962
Intercontinental Exchange, Inc.
0.376% 11/13/20 (a) (e)		1,000,000		999,557
0.376% 12/03/20 (a) (e)		1,000,000		999,337
NRW. Bank
0.162% 11/03/20 (a)		2,000,000		1,999,774
Societe Generale SA
0.081% 10/06/20 (a)		1,000,000		999,983
				9,998,027
U.S. Treasury Bill — 1.0%
U.S. Treasury Bill
0.000% 10/06/20		2,000,000		1,999,982
TOTAL SHORT-TERM INVESTMENTS (Cost $11,997,839)				11,998,009
TOTAL INVESTMENTS — 98.4% (Cost $192,496,006) (f)				193,036,964
Other Assets/(Liabilities) — 1.6%				3,146,209
NET ASSETS — 100.0%			$	196,183,173

Abbreviation Legend
ARS	Auction Rate Security
CLO	Collateralized Loan Obligation
FRN	Floating Rate Note
STEP	Step Up Bond
VRN	Variable Rate Note

Notes to Portfolio of Investments
Percentages are stated as a percent of net assets.
(a)	Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At September 30, 2020, the aggregate market value of these securities amounted to $124,101,453 or 63.26% of net assets.
(b)	Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions.  These securities do not indicate a reference rate and spread in their description above. The rates shown are the current interest rates at September 30, 2020.
(c)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.
(d)	A portion of this security is pledged/held as collateral for open derivatives.
(e)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At September 30, 2020, these securities amounted to a value of $1,998,894 or 1.02% of net assets.
(f)	See Note 3 for aggregate cost for federal tax purposes.

MML Short-Duration Bond Fund —  Portfolio of Investments (Continued)

(#) Interest Rate Swaptions Purchased

Paid by Fund

Received by Fund

Description

Counterparty

Expiration Date

Rate

Frequency

Rate

Frequency

Notional Amount

Value

Premium Paid (Received)

Unrealized Appreciation/ (Depreciation)

Put

10-Year Interest Rate Swap, 2/02/43

Credit Suisse International

1/31/33

3.11%

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

USD

3,080,000

$

76,230

$

147,532

$

(71,302

)

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount			Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Note 10 Year	12/21/20		152	$	21,186,675		$	22,075
Short
90 Day Eurodollar	12/14/20		2	$	(487,568	)	$	(11,207	)
U.S. Treasury Ultra 10 Year	12/21/20		54		(8,613,771	)		(22,010	)
U.S. Treasury Note 2 Year	12/31/20		129		(28,490,861	)		(13,100	)
U.S. Treasury Note 5 Year	12/31/20		524		(65,977,525	)		(62,850	)
90 Day Eurodollar	3/15/21		2		(487,743	)		(11,282	)
90 Day Eurodollar	9/13/21		3		(731,728	)		(16,847	)
90 Day Eurodollar	3/14/22		3		(731,503	)		(16,847	)
90 Day Eurodollar	9/19/22		3		(731,203	)		(16,997	)
90 Day Eurodollar	3/13/23		2		(487,168	)		(11,432	)
90 Day Eurodollar	12/18/23		3		(730,078	)		(16,997	)
90 Day Eurodollar	12/16/24		7		(1,701,414	)		(38,349	)
							$	(237,918	)

Centrally Cleared Credit Default Swaps - Buy Protection
Reference Obligation/Index	Rate Paid by Fund	Payment Frequency	Termination Date	Notional Amount		Value			Upfront Premium Paid/ (Received)			Unrealized Appreciation (Depreciation)
CDX.NA.IG Series 35†	1.000%	Quarterly	12/20/2025	USD	900,000	$	(18,757	)	$	(21,507	)	$	2,750
CDX.NA.IG Series 35†	1.000%	Quarterly	12/20/2025	USD	800,000		(16,673	)		(19,601	)		2,928
						$	(35,430	)	$	(41,108	)	$	5,678

† Payment is based on a percentage of the index. Reference entities are a number of individual issuers comprising the index.

Currency Legend
USD	U.S. Dollar

MML Small Cap Equity Fund —  Portfolio of Investments

September 30, 2020 (Unaudited)

	Number of Shares		Value
Equities — 99.2%
Common Stock — 99.2%
Basic Materials — 2.6%
Forest Products & Paper — 0.6%
Schweitzer-Mauduit International, Inc.		19,548	$	594,064
Mining — 2.0%
Compass Minerals International, Inc.		22,969		1,363,210
Kaiser Aluminum Corp.		15,061		807,119
				2,170,329
				2,764,393
Communications — 1.4%
Internet — 1.4%
Q2 Holdings, Inc. (a) (b)		16,660		1,520,392
Consumer, Cyclical — 14.8%
Auto Parts & Equipment — 3.0%
Dorman Products, Inc. (a)		16,534		1,494,343
Visteon Corp. (a)		24,124		1,669,863
				3,164,206
Entertainment — 0.3%
Cedar Fair LP (c)		11,532		323,703
Retail — 11.5%
AutoNation, Inc. (a)		40,877		2,163,620
Big Lots, Inc.		13,696		610,842
BJ's Wholesale Club Holdings, Inc. (a)		60,784		2,525,575
Foot Locker, Inc.		15,562		514,013
Jack in the Box, Inc.		18,697		1,482,859
Ollie's Bargain Outlet Holdings, Inc. (a)		5,492		479,726
Suburban Propane Partners LP (c)		96,387		1,569,180
Texas Roadhouse, Inc.		25,636		1,558,412
The Wendy's Co.		54,677		1,219,024
				12,123,251
				15,611,160
Consumer, Non-cyclical — 26.9%
Biotechnology — 4.5%
ADC Therapeutics SA (a)		9,047		298,461
Emergent BioSolutions, Inc. (a)		19,710		2,036,634
NeoGenomics, Inc. (a)		26,800		988,652
Twist Bioscience Corp. (a)		13,931		1,058,338

MML Small Cap Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Zai Lab Ltd. ADR (a)		4,469	$	371,687
				4,753,772
Commercial Services — 5.3%
ASGN, Inc. (a)		34,083		2,166,315
Korn Ferry		55,051		1,596,479
Monro, Inc.		26,168		1,061,636
Paylocity Holding Corp. (a)		4,392		708,957
				5,533,387
Foods — 1.9%
BellRing Brands, Inc. Class A (a)		47,288		980,753
The Simply Good Foods Co. (a) (b)		48,080		1,060,164
				2,040,917
Health Care – Products — 7.5%
Adaptive Biotechnologies Corp. (a)		14,359		698,278
AtriCure, Inc. (a)		24,434		974,917
Inspire Medical Systems, Inc. (a)		10,088		1,301,856
Intersect ENT, Inc. (a)		24,122		393,430
iRhythm Technologies, Inc. (a)		4,332		1,031,492
OraSure Technologies, Inc. (a)		32,136		391,095
Repligen Corp. (a)		6,940		1,023,928
Tandem Diabetes Care, Inc. (a)		17,964		2,038,914
				7,853,910
Health Care – Services — 5.0%
Addus HomeCare Corp. (a)		16,976		1,604,402
American Well Corp. (a)		9,640		285,730
LHC Group, Inc. (a)		12,468		2,650,198
Tenet Healthcare Corp. (a)		31,242		765,741
				5,306,071
Household Products & Wares — 1.2%
Acco Brands Corp.		221,316		1,283,633
Pharmaceuticals — 1.5%
Axsome Therapeutics, Inc. (a) (b)		5,551		395,509
Collegium Pharmaceutical, Inc. (a)		29,984		624,267
G1 Therapeutics, Inc. (a) (b)		14,390		166,204
uniQure NV (a)		10,924		402,331
				1,588,311
				28,360,001
Energy — 3.1%
Energy – Alternate Sources — 2.7%
Renewable Energy Group, Inc. (a)		51,961		2,775,756
Pipelines — 0.4%
Noble Midstream Partners LP (c)		59,412		434,896
				3,210,652

MML Small Cap Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Financial — 18.6%
Banks — 5.2%
The Bank of NT Butterfield & Son Ltd.		44,792	$	997,966
BankUnited, Inc.		46,583		1,020,634
Cathay General Bancorp		27,102		587,571
CIT Group, Inc.		32,326		572,493
First Horizon National Corp.		106,969		1,008,718
Heritage Financial Corp.		47,725		877,663
Signature Bank		5,087		422,170
				5,487,215
Diversified Financial Services — 2.6%
Federated Hermes, Inc.		22,924		493,095
Focus Financial Partners, Inc. Class A (a)		30,129		987,930
Stifel Financial Corp.		24,341		1,230,681
				2,711,706
Insurance — 0.6%
ProSight Global, Inc. (a)		24,881		282,150
Selectquote, Inc. (a)		19,075		386,269
				668,419
Real Estate Investment Trusts (REITS) — 6.0%
Brandywine Realty Trust (b)		117,087		1,210,680
DiamondRock Hospitality Co.		194,360		985,405
EPR Properties		37,320		1,026,300
Four Corners Property Trust, Inc.		75,976		1,944,226
National Storage Affiliates Trust		34,751		1,136,705
				6,303,316
Savings & Loans — 4.2%
Berkshire Hills Bancorp, Inc.		41,167		416,198
OceanFirst Financial Corp.		48,157		659,269
Pacific Premier Bancorp, Inc.		49,108		989,035
Sterling Bancorp		61,596		647,990
WSFS Financial Corp.		61,438		1,656,983
				4,369,475
				19,540,131
Industrial — 16.4%
Building Materials — 2.3%
Masonite International Corp. (a)		15,280		1,503,552
Summit Materials, Inc. Class A (a)		55,636		920,219
				2,423,771
Electrical Components & Equipment — 1.9%
Energizer Holdings, Inc.		27,701		1,084,217
EnerSys		13,971		937,734
				2,021,951

MML Small Cap Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Electronics — 0.7%
Atkore International Group, Inc. (a)		34,162	$	776,502
Engineering & Construction — 3.7%
Comfort Systems USA, Inc.		11,867		611,269
KBR, Inc.		70,933		1,586,062
TopBuild Corp. (a)		10,053		1,715,947
				3,913,278
Environmental Controls — 1.6%
Evoqua Water Technologies Corp. (a)		54,229		1,150,739
US Ecology, Inc.		14,665		479,106
				1,629,845
Machinery – Diversified — 1.0%
Chart Industries, Inc. (a)		15,578		1,094,666
Metal Fabricate & Hardware — 2.4%
Rexnord Corp.		64,271		1,917,847
Valmont Industries, Inc.		4,813		597,678
				2,515,525
Miscellaneous - Manufacturing — 1.0%
EnPro Industries, Inc.		18,027		1,016,903
Transportation — 1.8%
CryoPort, Inc. (a) (b)		24,903		1,180,402
Hub Group, Inc. Class A (a)		13,215		663,327
				1,843,729
				17,236,170
Technology — 12.4%
Computers — 2.5%
CACI International, Inc. Class A (a)		6,853		1,460,785
Perspecta, Inc.		60,799		1,182,541
				2,643,326
Semiconductors — 4.7%
Brooks Automation, Inc.		30,521		1,411,901
MKS Instruments, Inc.		16,108		1,759,477
Semtech Corp. (a)		34,528		1,828,603
				4,999,981
Software — 5.2%
1Life Healthcare, Inc. (a)		15,062		427,158
Bottomline Technologies de, Inc. (a)		36,063		1,520,416
Envestnet, Inc. (a)		11,222		865,890
j2 Global, Inc. (a)		24,325		1,683,777
Zynga, Inc. Class A (a)		101,441		925,142
				5,422,383
				13,065,690

MML Small Cap Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Utilities — 3.0%
Electric — 0.9%
Avista Corp.		28,920	$	986,751
Gas — 2.1%
National Fuel Gas Co.		19,363		785,944
South Jersey Industries, Inc.		74,323		1,432,204
				2,218,148
				3,204,899
TOTAL COMMON STOCK (Cost $90,680,883)				104,513,488
TOTAL EQUITIES (Cost $90,680,883)				104,513,488
TOTAL LONG-TERM INVESTMENTS (Cost $90,680,883)				104,513,488

	Principal Amount
Short-Term Investments — 0.8%
Repurchase Agreement — 0.8%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/20, 0.000%, due 10/01/20 (d)	$	845,522		845,522
TOTAL SHORT-TERM INVESTMENTS (Cost $845,522)				845,522
TOTAL INVESTMENTS — 100.0% (Cost $91,526,405) (e)				105,359,010
Other Assets/(Liabilities) — (0.0)%				(14,880	)
NET ASSETS — 100.0%			$	105,344,130

Abbreviation Legend

ADR American Depositary Receipt

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Non-income producing security.
(b)	Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2020, was $3,483,618 or 3.31% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $3,591,138 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments.  (Note 2).
(c)	Security is a Master Limited Partnership.
(d)	Maturity value of $845,522. Collateralized by U.S. Government Agency obligations with a rate of 2.375%, maturity date of 3/15/22, and an aggregate market value, including accrued interest, of $862,502.
(e)	See Note 3 for aggregate cost for federal tax purposes.

MML Special Situations Fund —  Portfolio of Investments

September 30, 2020 (Unaudited)

	Number of Shares		Value
Equities — 99.7%
Common Stock — 99.7%
Basic Materials — 21.1%
Chemicals — 15.6%
The Chemours Co.		43,100	$	901,221
Dow, Inc.		61,300		2,884,165
DuPont de Nemours, Inc.		6,600		366,168
Ingevity Corp. (a)		7,900		390,576
				4,542,130
Mining — 5.5%
Alcoa Corp. (a)		45,300		526,839
Arconic Corp. (a)		57,100		1,087,755
				1,614,594
				6,156,724
Communications — 2.2%
Media — 2.2%
Altice USA, Inc. Class A (a)		23,956		622,856
Consumer, Cyclical — 16.6%
Apparel — 1.6%
Kontoor Brands, Inc. (a) (b)		18,900		457,380
Auto Parts & Equipment — 1.9%
Delphi Technologies PLC (a)		32,800		548,088
Distribution & Wholesale — 1.9%
IAA, Inc. (a)		10,300		536,321
Resideo Technologies, Inc. (a)		510		5,610
				541,931
Entertainment — 6.3%
Penn National Gaming, Inc. (a) (b)		25,200		1,832,040
Leisure Time — 1.2%
Brunswick Corp.		6,000		353,460
Lodging — 3.7%
Hilton Grand Vacations, Inc. (a)		14,400		302,112
Wyndham Hotels & Resorts, Inc.		15,700		792,850
				1,094,962
				4,827,861

MML Special Situations Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Consumer, Non-cyclical — 19.8%
Biotechnology — 6.9%
Corteva, Inc.		69,500	$	2,002,295
Commercial Services — 3.2%
PayPal Holdings, Inc. (a)		4,762		938,257
Foods — 5.0%
Lamb Weston Holdings, Inc.		22,100		1,464,567
Health Care – Products — 2.1%
West Pharmaceutical Services, Inc.		2,197		603,955
Pharmaceuticals — 2.6%
Zoetis, Inc.		4,649		768,805
				5,777,879
Financial — 4.6%
Insurance — 3.2%
Brighthouse Financial, Inc. (a)		34,500		928,395
Real Estate Investment Trusts (REITS) — 1.4%
Park Hotels & Resorts, Inc.		41,900		418,581
				1,346,976
Industrial — 33.7%
Building Materials — 10.6%
Carrier Global Corp.		101,300		3,093,702
Electronics — 7.9%
Fortive Corp.		12,900		983,109
Honeywell International, Inc.		3,060		503,707
Keysight Technologies, Inc. (a)		8,302		820,071
				2,306,887
Engineering & Construction — 8.3%
Arcosa, Inc.		37,179		1,639,222
frontdoor, Inc. (a)		9,900		385,209
Jacobs Engineering Group, Inc.		4,100		380,357
				2,404,788
Machinery – Diversified — 6.9%
Otis Worldwide Corp.		29,800		1,860,116
Welbilt, Inc. (a)		24,400		150,304
				2,010,420
				9,815,797
Technology — 1.7%
Computers — 1.7%
Perspecta, Inc.		25,437		494,750
TOTAL COMMON STOCK   (Cost $25,540,654)				29,042,843
TOTAL EQUITIES (Cost $25,540,654)				29,042,843
TOTAL LONG-TERM INVESTMENTS (Cost $25,540,654)				29,042,843

MML Special Situations Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Short-Term Investments — 0.5%
Repurchase Agreement — 0.5%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/20, 0.000%, due 10/01/20 (c)	$	148,206	$	148,206
TOTAL SHORT-TERM INVESTMENTS (Cost $148,206)				148,206
TOTAL INVESTMENTS — 100.2% (Cost $25,688,860) (d)				29,191,049
Other Assets/(Liabilities) — (0.2)%				(56,362	)
NET ASSETS — 100.0%			$	29,134,687

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Non-income producing security.
(b)	Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2020, was $2,131,683 or 7.32% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $2,082,736 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments.  (Note 2).
(c)	Maturity value of $148,206. Collateralized by U.S. Government Agency obligations with a rate of 2.375%, maturity date of 3/15/22, and an aggregate market value, including accrued interest, of $151,227.
(d)	See Note 3 for aggregate cost for federal tax purposes.

MML Strategic Emerging Markets Fund —  Portfolio of Investments

September 30, 2020 (Unaudited)

	Number of Shares		Value
Equities — 98.4%
Common Stock — 95.1%
Belgium — 1.0%
Anheuser-Busch InBev SA		24,487	$	1,321,749
Bermuda — 1.8%
Credicorp Ltd.		11,881		1,473,125
Jardine Strategic Holdings Ltd.		47,189		934,885
				2,408,010
Brazil — 2.3%
Ambev SA		279,013		623,021
B3 SA - Brasil Bolsa Balcao		120,253		1,177,926
Vale SA Sponsored ADR (a)		123,636		1,308,069
				3,109,016
Cayman Islands — 25.7%
Alibaba Group Holding Ltd. Sponsored ADR  (b)		30,407		8,939,050
Budweiser Brewing Co. APAC Ltd. (c)		450,100		1,314,833
Hansoh Pharmaceutical Group Co. Ltd. (b) (c)		112,000		548,497
Huazhu Group Ltd. ADR		108,203		4,678,697
Innovent Biologics, Inc. (b) (c)		94,500		703,757
Meituan Dianping Class B (b)		34,000		1,069,275
New Oriental Education & Technology Group, Inc. Sponsored ADR (b)		2,436		364,182
OneConnect Financial Technology Co. Ltd. (a) (b)		63,180		1,345,734
Pagseguro Digital Ltd. Class A (a) (b)		32,845		1,238,585
Tencent Holdings Ltd.		148,209		9,869,737
Wuxi Biologics Cayman, Inc. (b) (c)		23,000		564,431
ZTO Express Cayman, Inc. (b)		7,437		215,144
ZTO Express Cayman, Inc. ADR		114,375		3,422,100
				34,274,022
Chile — 0.7%
Falabella SA		326,307		955,980
China — 5.0%
Jiangsu Hengrui Medicine Co. Ltd. Class A		211,287		2,796,883
Ping An Insurance Group Co. of China Ltd. Class A		340,562		3,817,321
				6,614,204
Colombia — 0.3%
Grupo Aval Acciones y Valores SA (a)		94,824		437,139
Egypt — 0.9%
Commercial International Bank Egypt SAE		276,906		1,168,105
France — 6.0%
Kering SA		10,707		7,113,572

MML Strategic Emerging Markets Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
LVMH Moet Hennessy Louis Vuitton SE		109	$	50,957
Pernod Ricard SA		5,064		808,164
				7,972,693
Hong Kong — 4.0%
AIA Group Ltd.		543,000		5,349,190
India — 11.8%
HDFC Bank Ltd. (b)		95,071		1,400,098
Housing Development Finance Corp. Ltd.		218,919		5,174,668
Infosys Ltd.		42,733		589,057
Kotak Mahindra Bank Ltd. (b)		223,900		3,849,218
Oberoi Realty Ltd. (b)		88,933		478,064
Tata Consultancy Services Ltd.		99,759		3,370,837
Zee Entertainment Enterprises Ltd.		315,798		905,550
				15,767,492
Indonesia — 1.1%
Bank Central Asia Tbk PT		525,600		959,206
Indocement Tunggal Prakarsa Tbk PT		337,997		236,670
Semen Indonesia Persero Tbk PT		394,300		243,883
				1,439,759
Italy — 1.9%
Moncler SpA (b)		22,108		905,507
PRADA SpA (b)		412,800		1,611,319
				2,516,826
Mexico — 4.6%
Alsea SAB de CV (b)		243,074		231,405
Fomento Economico Mexicano SAB de CV		457,471		2,569,608
Fomento Economico Mexicano SAB de CV Sponsored ADR		10,826		608,313
Grupo Aeroportuario del Sureste SAB de CV Class B (b)		42,094		488,493
Grupo Financiero Inbursa SAB de CV Class O (b)		524,534		405,413
Grupo Mexico SAB de CV Series B		741,532		1,887,408
				6,190,640
Netherlands — 3.6%
Yandex NV Class A (a) (b)		73,892		4,821,453
Philippines — 2.4%
Ayala Land, Inc.		1,631,200		999,413
SM Investments Corp.		95,845		1,739,839
SM Prime Holdings, Inc.		855,212		520,096
				3,259,348
Republic of Korea — 1.7%
Amorepacific Corp.		920		128,087
AMOREPACIFIC Group		5,263		218,394
Samsung Biologics Co. Ltd. (b) (c)		3,161		1,863,516
				2,209,997
Russia — 5.9%
Novatek PJSC Sponsored GDR Registered (c)		1,712		234,544

MML Strategic Emerging Markets Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Novatek PJSC Sponsored GDR Registered (a) (c)		31,597	$	4,323,408
Polyus PJSC (b)		2,130		447,351
Polyus PJSC GDR (c) (d)		4,342		457,647
Polyus PJSC GDR (c) (d)		129		13,597
Sberbank of Russia PJSC (b)		802,803		2,358,422
				7,834,969
South Africa — 0.6%
FirstRand Ltd.		337,042		828,201
Switzerland — 0.7%
Cie Financiere Richemont SA Registered		12,810		858,024
Taiwan — 8.7%
MediaTek, Inc.		17,000		358,477
Taiwan Semiconductor Manufacturing Co. Ltd.		748,000		11,233,895
				11,592,372
Turkey — 0.3%
Akbank T.A.S. (b)		651,198		433,878
United States — 4.1%
Yum China Holdings, Inc.		103,507		5,480,696
TOTAL COMMON STOCK (Cost $104,603,949)				126,843,763
Preferred Stock — 3.3%
Brazil — 1.7%
Lojas Americanas SA 0.640%
		438,159		2,215,021
India — 0.0%
Zee Entertainment Enterprises Ltd. 6.000%		503,840		24,584
Singapore — 1.6%
Grab Holdings, Inc. (Acquired 6/18/19, Cost $2,160,355) (b) (d) (e) (f)		350,542		2,160,355
TOTAL PREFERRED STOCK (Cost $4,537,114)				4,399,960
TOTAL EQUITIES (Cost $109,141,063)				131,243,723
Mutual Funds — 0.2%
United States — 0.2%
State Street Navigator Securities Lending Prime Portfolio (g)		304,707		304,707
TOTAL MUTUAL FUNDS (Cost $304,707)				304,707
TOTAL LONG-TERM INVESTMENTS (Cost $109,445,770)				131,548,430

MML Strategic Emerging Markets Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Short-Term Investments — 1.7%
Repurchase Agreement — 1.7%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/20, 0.000%, due 10/01/20 (h)	$	2,248,141	$	2,248,141
TOTAL SHORT-TERM INVESTMENTS (Cost $2,248,141)				2,248,141
TOTAL INVESTMENTS — 100.3% (Cost $111,693,911) (i)				133,796,571
Other Assets/(Liabilities) — (0.3)%				(371,392	)
NET ASSETS — 100.0%			$	133,425,179

Abbreviation Legend

ADR	American Depositary Receipt
GDR	Global  Depositary Receipt

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2020, was $4,247,601 or 3.18% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $4,019,128 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments.  (Note 2).
(b)	Non-income producing security.
(c)	Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At September 30, 2020, the aggregate market value of these securities amounted to $10,024,230 or 7.51% of net assets.
(d)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At September 30, 2020, these securities amounted to a value of $2,631,599 or 1.97% of net assets.
(e)	Investment was valued using significant unobservable inputs.
(f)	Restricted security. Certain securities are restricted as to resale. At September 30, 2020, these securities amounted to a value of $2,160,355 or 1.62% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.
(g)	Represents investment of security lending cash collateral. (Note 2).
(h)	Maturity value of $2,248,141. Collateralized by U.S. Government Agency obligations with a rate of 2.375%, maturity date of 3/15/22, and an aggregate market value, including accrued interest, of $2,293,114.
(i)	See Note 3 for aggregate cost for federal tax purposes.

Notes to Portfolio of Investments (Unaudited)

1. The Funds

MML Series Investment Fund II (the “Trust”) is registered under the Investment Company Act of 1940, as amended (the “1940 Act”), as an open-end management investment company. The Trust is organized under the laws of the Commonwealth of Massachusetts as a Massachusetts business trust pursuant to an Agreement and Declaration of Trust dated February 8, 2005, which was amended and restated as of February 28, 2005 and December 15, 2011, as it may be further amended from time to time. The Trust consists of the following series (each individually referred to as a “Fund” or collectively as the “Funds”):

MML Asset Momentum Fund ("Asset Momentum Fund")

MML Blend Fund (“Blend Fund”)

MML Dynamic Bond Fund ("Dynamic Bond Fund")

MML Equity Fund (“Equity Fund”)

MML Equity Rotation Fund ("Equity Rotation Fund")

MML High Yield Fund ("High Yield Fund")

MML Inflation-Protected and Income Fund (“Inflation-Protected and Income Fund”)

MML Managed Bond Fund (“Managed Bond Fund”)

MML Short-Duration Bond Fund ("Short-Duration Bond Fund")

MML Small Cap Equity Fund ("Small Cap Equity Fund")

MML Special Situations Fund ("Special Situations Fund")

MML Strategic Emerging Markets Fund (“Strategic Emerging Markets Fund”)

The Trust makes shares of the Funds available for the investment of assets of various separate investment accounts established by Massachusetts Mutual Life Insurance Company (“MassMutual”) and by life insurance companies which are subsidiaries of MassMutual. Shares of the Trust are not offered to the general public. MassMutual, MML Bay State Life Insurance Company, C.M. Life Insurance Company, and the MML Allocation Funds, which are “funds of funds” series of MML Series Investment Fund, another open-end management investment company sponsored by MassMutual, are the record owners of all of the outstanding shares of the Funds.

2. Significant Accounting Policies

Each Fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification Topic 946, Financial Services – Investment Companies.

Investment Valuation

The net asset value of each Fund’s shares is determined once daily as of the close of regular trading on the New York Stock Exchange (“NYSE”), on each day the NYSE is open for trading (a “business day”). The NYSE normally closes at 4:00 p.m. Eastern Time, but may close earlier on some days. If the NYSE is scheduled to close early, the business day will be considered to end as of the time of the NYSE’s scheduled close. A Fund will not treat an intraday disruption in NYSE trading or other event that causes an unscheduled closing of the NYSE as a close of business of the NYSE for these purposes and will instead fair value securities in accordance with procedures approved annually by the Board of Trustees ("Trustees"), and under the general oversight of the Trustees. On holidays and other days when the NYSE is closed, each Fund’s net asset value generally is not calculated and the Funds do not anticipate accepting buy or sell orders. However, the value of each Fund’s assets may still be affected on such days to the extent that a Fund holds foreign securities that trade on days that foreign securities markets are open.

Notes to Portfolio of Investments (Unaudited) (Continued)

Equity securities and derivative contracts that are actively traded on a national securities exchange or contract market are valued on the basis of information furnished by a pricing service, which provides the last reported sale price, or, in the case of futures contracts, the settlement price, for securities or derivatives listed on the exchange or contract market or the official closing price on the NASDAQ National Market System (“NASDAQ System”), or in the case of over-the-counter (“OTC”) securities for which an official closing price is unavailable or not reported on the NASDAQ System, the last reported bid price. Portfolio securities traded on more than one national securities exchange are valued at the last price at the close of the exchange representing the principal market for such securities. Debt securities are valued on the basis of valuations furnished by a pricing service, which generally determines valuations taking into account factors such as institutional-size trading in similar securities, yield, quality, coupon rate, maturity, type of issue, trading characteristics, and other market data. Shares of other open-end mutual funds are valued at their closing net asset values as reported on each business day.

Investments for which market quotations are readily available are marked to market daily based on those quotations. Market quotations may be provided by third-party vendors or market makers, and may be determined on the basis of a variety of factors, such as broker quotations, financial modeling, and other market data, such as market indexes and yield curves, counterparty information, and foreign exchange rates. U.S. Government and agency securities may be valued on the basis of market quotations or using a model that may incorporate market observable data such as reported sales of similar securities, broker quotes, yields, bids, offers, quoted market prices, and reference data. The fair values of OTC derivative contracts, including forward, swap, and option contracts related to interest rates, foreign currencies, credit standing of reference entities, equity prices, or commodity prices, may be based on market quotations or may be modeled using a series of techniques, including simulation models, depending on the contract and the terms of the transaction. The fair values of asset-backed securities and mortgage-backed securities are estimated based on models that consider the estimated cash flows of each debt tranche of the issuer, established benchmark yield, and estimated tranche-specific spread to the benchmark yield based on the unique attributes of the tranche, including, but not limited to, prepayment speed assumptions and attributes of the collateral. Restricted securities are generally valued at a discount to similar publicly traded securities.

Investments for which market quotations are not available or for which a pricing service or vendor does not provide a value, or for which such market quotations or values are considered by the investment adviser or subadviser to be unreliable (including, for example, certain foreign securities, thinly-traded securities, certain restricted securities, certain initial public offerings, or securities whose values may have been affected by a significant event) are stated at fair valuations determined in good faith by the Funds' Valuation Committee¹ in accordance with procedures approved annually by the Trustees, and under the general oversight of the Trustees. The Funds' Valuation Committee employs various methods to determine fair valuations including a regular review of significant inputs and assumptions and review of any related market activity. The Funds' Valuation Committee reports to the Trustees at its regularly scheduled meetings. It is possible that fair value prices will be used by the Funds to a significant extent. The value determined for an investment using the Funds' fair value procedures may differ from recent market prices for the investment and may be significantly different from the value realized upon the sale of such investment.

The Funds may invest in securities that are traded principally in foreign markets and that trade on weekends and other days when the Funds do not price their shares. As a result, the values of the Funds' portfolio securities may change on days when the prices of the Funds' shares are not calculated. The prices of the Funds' shares will reflect any such changes when the prices of the Funds' shares are next calculated, which is the next business day.  The Funds may use fair value pricing more frequently for securities primarily traded in foreign markets because, among other things, most foreign markets close well before the Funds value their securities. The earlier close of these foreign markets gives rise to the possibility that significant events, including broad market moves, may have occurred in the interim. The Funds' investments may be priced based on fair values provided by a third-party vendor, based on certain factors and methodologies applied by such vendor, in the event that there is movement in the U.S. market, between the close of the foreign market and the time the Funds calculate their net asset values. All assets and liabilities expressed in foreign currencies are converted into U.S. dollars at the mean between the buying and selling rates of such currencies against the U.S. dollar at the end of each business day.

1 The voting members of the Valuation Committee consist of the President, Treasurer, Assistant Treasurers, Vice Presidents (except for the CCO, Secretary, and Assistant Secretaries) of the Trust, as well as such other members as the Trustees may from time to time designate. The non-voting members of the Valuation Committee consist of the CCO, Secretary, and Assistant Secretaries. The Valuation Committee reviews and determines the fair valuation of portfolio securities and the Funds’ pricing procedures in general.

Notes to Portfolio of Investments (Unaudited) (Continued)

For investments in equity or debt issued by privately held companies or funds (“Private Company” or collectively, the “Private Companies”) and any other investments fair valued using significant unobservable inputs, as described below, the fair valuation approaches used by third party service providers and/or the Funds’ subadvisers utilize one or a combination of, but not limited to, the following inputs:

Market approach: (i) recent market transactions, including subsequent rounds of financing, in the underlying investment or comparable issuers; (ii) recapitalizations and other transactions across the capital structure; and (iii) market multiples of comparable issuers.

Income approach: (i) future cash flows discounted to present value and adjusted as appropriate for liquidity, credit, and/or market risks; (ii) quoted prices for similar investments or assets in active markets; and (iii) other risk factors, such as interest rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks, recovery rates, liquidation amounts, and/or default rates.

Cost approach: (i) audited or unaudited financial statements, investor communications, and financial or operational metrics issued by the Private Company; (ii) changes in the valuation of relevant indices or publicly traded companies comparable to the Private Company; (iii) relevant news and other public sources; and (iv) known secondary market transactions in the Private Company's interests and merger or acquisition activity in companies comparable to the Private Company.

Investments in series of preferred stock issued by Private Companies are typically valued utilizing Market approach in determining the enterprise value of the company. Such investments often contain rights and preferences that differ from other series of preferred and common stock of the same issuer. Valuation techniques such as the current value method (“CVM”), an option pricing model (“OPM”), a probability weighted expected return model (“PWERM”), or a hybrid of those techniques are used in allocating enterprise value of the company, as deemed appropriate under the circumstances. The CVM allocates value among the various parts of a company’s capital structure assuming that the value of convertible preferred stock is represented by the most favorable claim the preferred stockholders have on the enterprise value as of the valuation date. The use of OPM and PWERM techniques involve a determination of the exit scenarios of the investment in order to appropriately allocate the enterprise value of the company among the various parts of its capital structure.

The Private Companies are not subject to the public company disclosure, timing, and reporting standards as other investments held by a Fund. Typically, the most recently available information for a Private Company is as of a date that is earlier than the date a Fund is calculating its net asset value. This factor may result in a difference between the value of the investment and the price a Fund could receive upon the sale of the investment.

Notes to Portfolio of Investments (Unaudited) (Continued)

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. A three-tier hierarchy is utilized to maximize the use of observable market data inputs and minimize the use of unobservable inputs and to establish classification of fair value measurements for disclosure purposes. Inputs refer broadly to the assumptions that market participants would use in pricing the asset or liability, including assumptions about risk, for example, the risk inherent in a particular valuation technique used to measure fair value (such as a pricing model) and/or the risk inherent in the inputs to the valuation technique. Inputs may be observable or unobservable. Observable inputs are inputs that reflect the assumptions market participants would use in pricing the asset or liability and are developed based on market data obtained from sources independent of the reporting entity. Unobservable inputs are inputs that reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability and are developed based on the best information available in the circumstances. The three-tier hierarchy of inputs is summarized in the three broad Levels listed below. The inputs or methodology used for valuing investments are not necessarily an indication of the risk associated with investing in those investments and the determination of the significance of a particular input to the fair value measurement in its entirety requires judgment and consideration of factors specific to each security.

Level 1 – quoted prices (unadjusted) in active markets for identical investments that the Funds can access at the measurement date

Level 2 – other significant observable inputs (including quoted prices for similar investments, interest rates, prepayment speeds, credit risk, etc.)

Level 3 – significant unobservable inputs, to the extent observable inputs are not available (including the Funds' own assumptions in determining the fair value of investments)

The availability of observable inputs can vary from security to security and is affected by a wide variety of factors, including, for example, the type of security, whether the security is new and not yet established in the marketplace, the liquidity of markets, and other characteristics particular to the security. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised in determining fair value is greatest for instruments categorized in Level 3.

Changes in valuation techniques may result in transfers in or out of an investment’s assigned Level within the hierarchy. In addition, in periods of market dislocation, the observability of prices and inputs may be reduced for many instruments. This condition, as well as changes related to liquidity of investments, could cause a security to be reclassified between Levels.

In certain cases, the inputs used to measure fair value may fall into different Levels of the fair value hierarchy. In such cases, for disclosure purposes, the Level in the fair value hierarchy within which the fair value measurement falls is determined based on the lowest Level input that is significant to the overall fair value measurement.

The Equity Rotation Fund, Small Cap Equity Fund, and Special Situations Fund characterized all long-term investments at Level 1, and all short-term investments at Level 2, as of September 30, 2020. For each Fund noted in the preceding sentence, the level classification by major category of investments is the same as the category presentation in the Portfolio of Investments.

Notes to Portfolio of Investments (Unaudited) (Continued)

The following is the aggregate value by input level, as of September 30, 2020, for the remaining Funds' investments:

Asset Momentum Fund
Asset Investments	Level 1			Level 2			Level 3		Total
Common Stock	$	5,925,778		$	2,645,574	*	$	—	$	8,571,352
U.S. Treasury Obligations		—			9,070,012			—		9,070,012
Mutual Funds		17,622,193			—			—		17,622,193
Short-Term Investments		—			5,383,393			—		5,383,393
Total Investments	$	23,547,971		$	17,098,979		$	—	$	40,646,950
Asset Derivatives
Futures Contracts	$	8,708		$	—		$	—	$	8,708
Liability Derivatives
Futures Contracts	$	(210,375	)	$	—		$	—	$	(210,375	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Blend Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Common Stock	$	483,866,527		$	—		$	—	$	483,866,527
Preferred Stock		519,400			—			—		519,400
Corporate Debt		—			100,131,787			—		100,131,787
Municipal Obligations		—			958,691			—		958,691
Non-U.S. Government Agency Obligations		—			77,942,740			—		77,942,740
Sovereign Debt Obligations		—			1,908,282			—		1,908,282
U.S. Government Agency Obligations and Instrumentalities		—			57,658,810			—		57,658,810
U.S. Treasury Obligations		—			7,645,947			—		7,645,947
Purchased Options		—			398,474			—		398,474
Rights		57,546			—			—		57,546
Warrants		1,359			—			—		1,359
Mutual Funds		341,438			—			—		341,438
Short-Term Investments		—			41,949,440			—		41,949,440
Total Investments	$	484,786,270		$	288,594,171		$	—	$	773,380,441
Asset Derivatives
Futures Contracts	$	18,526		$	—		$	—	$	18,526
Liability Derivatives
Futures Contracts	$	(382,122	)	$	—		$	—	$	(382,122	)
Swap Agreements		—			(43,766	)		—		(43,766	)
Total	$	(382,122	)	$	(43,766	)	$	—	$	(425,888	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Dynamic Bond Fund
Asset Investments	Level 1		Level 2		Level 3		Total
Bank Loans (Less Unfunded Loan Commitments)	$	—	$	12,636,408	$	—	$	12,636,408
Corporate Debt		—		89,062,627		—		89,062,627
Municipal Obligations		—		484,720		—		484,720
Non-U.S. Government Agency Obligations		—		88,348,064		—		88,348,064
Sovereign Debt Obligations		—		3,999,124		—		3,999,124
U.S. Government Agency Obligations and Instrumentalities		—		67,082,837		—		67,082,837
U.S. Treasury Obligations		—		92,376,378		—		92,376,378
Short-Term Investments		—		11,326,010		—		11,326,010
Unfunded Loan Commitments**		—		369		—		369
Total Investments	$	—	$	365,316,537	$	—	$	365,316,537

Notes to Portfolio of Investments (Unaudited) (Continued)

Equity Fund
Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock	$	679,137,287	$	591,093	$	—	$	679,728,380
Preferred Stock		424,910		—		—		424,910
Mutual Funds		15,261,843		—		—		15,261,843
Short-Term Investments		1,501,349		2,357,493		—		3,858,842
Total Investments	$	696,325,389	$	2,948,586	$	—	$	699,273,975

Notes to Portfolio of Investments (Unaudited) (Continued)

High Yield Fund
Asset Investments	Level 1		Level 2		Level 3			Total
Common Stock	$	143,704	$	163	$	—	+	$	143,867
Bank Loans		—		5,072,431		—			5,072,431
Corporate Debt		—		111,030,305		225,280			111,255,585
Warrants		—		—		—	+		—
Total Investments	$	143,704	$	116,102,899	$	225,280		$	116,471,883

Notes to Portfolio of Investments (Unaudited) (Continued)

Inflation-Protected and Income Fund
Asset Investments	Level 1			Level 2			Level 3		Total
Municipal Obligations	$	—		$	24,811		$	—	$	24,811
Non-U.S. Government Agency Obligations		—			209,567,714			—		209,567,714
U.S. Government Agency Obligations and Instrumentalities		—			15,522,468			—		15,522,468
U.S. Treasury Obligations		—			73,943,160			—		73,943,160
Purchased Options		—			1,192,932			—		1,192,932
Short-Term Investments		—			35,277,696			—		35,277,696
Total Investments	$	—		$	335,528,781		$	—	$	335,528,781
Asset Derivatives
Futures Contracts	$	43,695		$	—		$	—	$	43,695
Swap Agreements		—			2,066,129			—		2,066,129
Total	$	43,695		$	2,066,129		$	—	$	2,109,824
Liability Derivatives
Futures Contracts	$	(23,531	)	$	—		$	—	$	(23,531	)
Swap Agreements		—			(576,837	)		—		(576,837	)
Total	$	(23,531	)	$	(576,837	)	$	—	$	(600,368	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Managed Bond Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Preferred Stock	$	2,467,150		$	—		$	—	$	2,467,150
Corporate Debt		—			416,487,002			—		416,487,002
Municipal Obligations		—			4,621,304			—		4,621,304
Non-U.S. Government Agency Obligations		—			324,337,195			—		324,337,195
Sovereign Debt Obligations		—			7,650,479			—		7,650,479
U.S. Government Agency Obligations and Instrumentalities		—			238,230,487			—		238,230,487
U.S. Treasury Obligations		—			33,891,069			—		33,891,069
Purchased Options		—			2,018,451			—		2,018,451
Short-Term Investments		—			163,460,895			—		163,460,895
Total Investments	$	2,467,150		$	1,190,696,882		$	—	$	1,193,164,032
Asset Derivatives
Futures Contracts	$	83,898		$	—		$	—	$	83,898
Liability Derivatives
Futures Contracts	$	(1,510,316	)	$	—		$	—	$	(1,510,316	)
Swap Agreements		—			(187,569	)		—		(187,569	)
Total	$	(1,510,316	)	$	(187,569	)	$	—	$	(1,697,885	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Short-Duration Bond Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Corporate Debt	$	—		$	76,430,855		$	—	$	76,430,855
Municipal Obligations		—			457,110			—		457,110
Non-U.S. Government Agency Obligations		—			99,493,463			—		99,493,463
U.S. Government Agency Obligations and Instrumentalities		—			3,253,859			—		3,253,859
U.S. Treasury Obligations		—			1,327,438			—		1,327,438
Purchased Options		—			76,230			—		76,230
Short-Term Investments		—			11,998,009			—		11,998,009
Total Investments	$	—		$	193,036,964		$	—	$	193,036,964
Asset Derivatives
Futures Contracts	$	22,075		$	—		$	—	$	22,075
Liability Derivatives
Futures Contracts	$	(237,918	)	$	—		$	—	$	(237,918	)
Swap Agreements		—			(35,430	)		—		(35,430	)
Total	$	(237,918	)	$	(35,430	)	$	—	$	(273,348	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Strategic Emerging Markets Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock*
Belgium	$	—	$	1,321,749	$	—	$	1,321,749
Bermuda		1,473,125		934,885		—		2,408,010
Brazil		3,109,016		—		—		3,109,016
Cayman Islands		20,203,492		14,070,530		—		34,274,022
Chile		955,980		—		—		955,980
China		—		6,614,204		—		6,614,204
Colombia		437,139		—		—		437,139
Egypt		—		1,168,105		—		1,168,105
France		—		7,972,693		—		7,972,693
Hong Kong		—		5,349,190		—		5,349,190
India		—		15,767,492		—		15,767,492
Indonesia		—		1,439,759		—		1,439,759
Italy		—		2,516,826		—		2,516,826
Mexico		6,190,640		—		—		6,190,640
Netherlands		4,821,453		—		—		4,821,453
Philippines		—		3,259,348		—		3,259,348
Republic of Korea		—		2,209,997		—		2,209,997
Russia		234,544		7,600,425		—		7,834,969
South Africa		—		828,201		—		828,201
Switzerland		—		858,024		—		858,024
Taiwan		—		11,592,372		—		11,592,372
Turkey		—		433,878		—		433,878
United States		5,480,696		—		—		5,480,696
Preferred Stock
Brazil		2,215,021		—		—		2,215,021
India		24,584		—		—		24,584
Singapore		—		—		2,160,355		2,160,355
Mutual Funds		304,707		—		—		304,707
Short-Term Investments		—		2,248,141		—		2,248,141
Total Investments	$	45,450,397	$	86,185,819	$	2,160,355	$	133,796,571

Notes to Portfolio of Investments (Unaudited) (Continued)

* Includes foreign equity securities whose values were adjusted to reflect market trading of comparable securities or other correlated instruments after the close of trading in their respective foreign markets, as applicable.

** Unfunded loan commitments are valued at the unrealized appreciation (depreciation) on the commitment.

+ Represents a security at $0 value as of September 30, 2020.

Notes to Portfolio of Investments (Unaudited) (Continued)

Derivative Instruments

Derivatives are financial instruments whose values are based on the values of one or more indicators, such as a security, asset, currency, interest rate, or index. Derivative transactions can create investment leverage and may be highly volatile. Losses from derivatives can be substantially greater than the derivatives' original cost and can sometimes be unlimited. A Fund may not be able to close out a derivative transaction at a favorable time or price.

Please refer to the Funds' most recent Annual/Semiannual reports and prospectus(es) and Statement(s) of Additional Information which can be found on the Securities and Exchange Commission's ("SEC") EDGAR database on its website at http://www.sec.gov for more information regarding the derivatives and other investments held by the Fund(s).

Securities Lending

Each Fund may lend its securities; however, lending cannot exceed 33% of the total assets of the Fund taken at current value. The Funds’ securities lending activities are governed by a Securities Lending Agency Agreement (“Lending Agreement”) between each Fund and the lending agent (“Agent”). The Lending Agreement authorizes the Agent to lend portfolio securities held by a Fund to approved borrowers (each, a “Borrower”).

Each Fund expects that in connection with any securities on loan, the loan will be secured continuously by collateral consisting of cash (U.S. currency) and/or securities (U.S. Treasury and Agency obligations) adjusted daily to have value at least equal to the current market value of the securities loaned. The market value of the loaned securities is determined at the close of business of a Fund and any additional collateral is delivered to the Fund the next business day. The Funds bear the risk of loss with respect to the investment of cash collateral. As with other extensions of credit, the Funds may bear the risk of delay in recovery of the loaned securities or even loss of rights in the collateral should the Borrower of the securities fail financially. Pursuant to the Lending Agreement, the Agent has provided indemnification to the Funds in the event of default by a Borrower with respect to a loan. The Funds receive compensation for lending their securities in the form of a securities loan fee paid by the Borrower, as well as a share of the income earned on investment of the cash collateral received for the loaned securities. At September 30, 2020, the Funds' collateral was equal to or greater than 100% of the market value of securities on loan.

Subject to the terms of the Lending Agreement and the agreement between the Agent and the applicable Borrower (“Borrowing Agreement”), security loans can be terminated by the Agent, the Fund, or the Borrower and the related securities must be returned within the earlier of the customary settlement period for such securities or the period of time specified in the Borrowing Agreement.

Notes to Portfolio of Investments (Unaudited) (Continued)

Accounting for Investment Transactions

Investment transactions are accounted for on the trade date. Realized gains and losses on sales of investments and unrealized appreciation and depreciation of investments are computed by the specific identification cost method. Proceeds received from litigation, if any, are included in realized gains on investment transactions for any investments that are no longer held in the portfolio and as a reduction in cost for investments that continue to be held in the portfolio. Interest income, adjusted for amortization of discounts and premiums on debt securities, is earned from the settlement date and is recorded on the accrual basis. Dividend income is recorded on the ex-dividend date. Withholding taxes on foreign interest, dividends, and capital gains have been provided for in accordance with the applicable country's tax rules and rates. Foreign dividend income is recorded on the ex-dividend date or as soon as practicable after the Fund determines the existence of a dividend declaration after exercising reasonable due diligence. Distributions received on securities that represent a return of capital or capital gains are recorded as a reduction of cost of investments and/or as a realized gain. The Funds determine the classification of distributions received as return of capital distributions or capital gain distributions.

Foreign Currency Translation

The books and records of the Funds are maintained in U.S. dollars. The market values of foreign currencies, foreign securities, and other assets and liabilities denominated in foreign currencies are translated into U.S. dollars at the mean of the buying and selling rates of such currencies against the U.S. dollar at the end of each business day. Purchases and sales of foreign securities and income and expense items are translated at the rates of exchange prevailing on the respective dates of such transactions. The Funds do not isolate that portion of the results of operations arising from changes in the exchange rates from that portion arising from changes in the market prices of securities. Net realized foreign currency gains and losses resulting from changes in exchange rates include foreign currency gains and losses between trade date and settlement date on investment securities transactions, foreign currency transactions, and the difference between the amounts of dividends or interest recorded on the books of the Funds and the amount actually received.

Foreign Securities

The Strategic Emerging Markets Fund invests substantially all of its assets in foreign securities. The other Funds may also invest in foreign securities. Foreign securities, including American Depositary Receipts, are subject to additional risks compared to securities of U.S. issuers, including international trade, currency, political, regulatory, and diplomatic risks. In addition, fluctuations in currency exchange rates may adversely affect the values of foreign securities and the price of a Fund’s shares. Emerging markets securities are subject to greater risks than securities issued in developed foreign markets, including less liquidity, greater price volatility, higher relative rates of inflation, greater political, economic, and social instability, greater custody and operational risks, and greater volatility in currency exchange rates. 

Federal  Income Tax

It is each Fund's intent to continue to comply with the provisions of Subchapter M of the Internal Revenue Code of 1986, as amended, applicable to a regulated investment company. Under such provisions, the Funds would not be subject to federal income taxes on their ordinary income and net realized capital gains to the extent they are distributed or deemed to have been distributed to their shareholders. Therefore, the Funds have not made any provision for federal income tax.

Dividends and Distributions to Shareholders

Dividends from net investment income and distributions of any net realized capital gains of each Fund are declared and paid annually and at other times as may be required to satisfy tax or regulatory requirements. 

Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from generally accepted accounting principles. As a result, net investment income and net realized capital gains on investment transactions for a reporting period may differ significantly from distributions during such period.

Notes to Portfolio of Investments (Unaudited) (Continued)

3. Federal Income Tax Information

At September 30, 2020, the aggregate cost of investments and the unrealized appreciation (depreciation) in the value of all investments owned by the Fund(s), as computed on a federal income tax basis, were as follows:

	Federal Income Tax Cost		Tax Basis Unrealized Appreciation		Tax Basis Unrealized (Depreciation)			Net Unrealized Appreciation (Depreciation)
Asset Momentum Fund	$	37,069,260	$	4,560,797	$	(983,107	)	$	3,577,690
Blend Fund		598,623,352		190,753,946		(15,996,857	)		174,757,089
Dynamic Bond Fund		360,150,207		14,997,191		(9,830,861	)		5,166,330
Equity Fund		632,692,629		100,723,613		(34,142,267	)		66,581,346
Equity Rotation Fund		29,545,839		7,998,975		(1,623,882	)		6,375,093
High Yield Fund		120,188,007		4,325,450		(8,041,574	)		(3,716,124	)
Inflation-Protected and Income Fund		331,846,642		6,407,579		(2,725,440	)		3,682,139
Managed Bond Fund		1,172,427,666		41,700,186		(20,963,820	)		20,736,366
Short-Duration Bond Fund		192,496,006		3,542,378		(3,001,420	)		540,958
Small Cap Equity Fund		91,526,405		28,096,675		(14,264,070	)		13,832,605
Special Situations Fund		25,688,860		5,600,692		(2,098,503	)		3,502,189
Strategic Emerging Markets Fund		111,693,911		31,706,178		(9,603,518	)		22,102,660

Notes to Portfolio of Investments (Unaudited) (Continued)

4. New Accounting Pronouncements

In March 2020, FASB issued Accounting Standards Update 2020-04 — Reference Rate Reform (Topic 848) — Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). ASU 2020-04 provides optional temporary financial reporting relief from the effect of certain types of contract modifications due to the planned discontinuation of the London Interbank Offered Rate (“LIBOR”) and other interbank-offered based reference rates as of the end of 2021. ASU 2020-04 is effective for certain reference rate-related contract modifications that occur during the period March 12, 2020 through December 31, 2022. Management is currently evaluating the impact, if any, of applying ASU 2020-04.

In October 2020, Accounting Standards Update 2017-08, Receivables --Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities (“ASU 2017-08”) was amended by Accounting Standards Update 2020-08, Codification Improvements to Subtopic 310-20, Receivables --Nonrefundable Fees and Other Costs (“ASU 2020-08”). ASU 2020-08 requires entities to reevaluate whether callable debt securities fall within the scope of ASU 2017-08 at each reporting period. ASU 2020-08 also amends the relevant guidance to require premiums to be amortized to the “next call date” rather than the “earliest call date,” and further clarifies the definition of “next call date.” ASU 2020-08 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early adoption of ASU 2020-08 is not permitted. Management is currently evaluating the impact, if any, of applying ASU 2020-08.

5. Legal Proceedings

On December 7, 2010, the Trust was named as a defendant and putative member of the proposed defendant class of shareholders named in an adversary proceeding brought by The Official Committee of Unsecured Creditors of Tribune Company (the “Official Committee”) in the U.S. Bankruptcy Court for the District of Delaware, in connection with Tribune Company’s Chapter 11 bankruptcy proceeding (In re Tribune Company). The proceeding relates to a leveraged buyout (“LBO”) transaction by which Tribune Company converted to a privately-held company in 2007, and the putative defendant class is comprised of beneficial owners of shares of Tribune Company who received proceeds (the “Proceeds”) of the LBO. The Official Committee seeks to recover payments of those Proceeds. On April 5, 2012, the adversary proceeding was transferred to the Southern District of New York for consolidated pretrial proceedings. The action is now being prosecuted by the litigation trustee (“Trustee”) for the Tribune Litigation Trust.

The potential amounts sought to be recovered from the Blend Fund and Small Cap Equity Fund are approximately $207,400 and $93,500, respectively, plus interest and the Official Committee’s court costs.

In addition, on June 2, 2011, the Blend Fund was named as a defendant in a closely related, parallel adversary proceeding brought in connection with the Tribune Company’s LBO by Deutsche Bank Trust Company Americas, in its capacity as successor indenture trustee for a certain series of Senior Notes, Law Debenture Trust Company of New York, in its capacity as successor indenture trustee for a certain series of Senior Notes, and Wilmington Trust Company, in its capacity as successor indenture trustee for the PHONES Notes (together, the “Plaintiffs”), in the United States District Court for the District of Massachusetts. The Plaintiffs also seek to recover payments of the Proceeds. On December 20, 2011, this action was transferred to the Southern District of New York for consolidated pretrial proceedings.

The Funds cannot predict the outcome of these proceedings. Accordingly, the Funds have not accrued any amounts related to these proceedings. If the proceedings were to be decided in a manner adverse to the Funds, or if the Funds were to enter into a settlement agreement with the Trustee or the Plaintiffs, as applicable, the payment of such judgment or settlement could potentially have a material adverse effect on the Funds' net asset value depending on the net assets of each applicable Fund at the time of such judgment or settlement.

Notes to Portfolio of Investments (Unaudited) (Continued)

6. Coronavirus (COVID-19) Pandemic

The global pandemic outbreak of the novel coronavirus known as COVID-19 has produced, and will likely continue to produce, substantial market volatility, severe market dislocations and liquidity constraints in many markets, and global business disruption, and it may result in future significant adverse effects, such as exchange trading suspensions and closures, declines in global financial markets, higher default rates, and a substantial economic downturn or recession throughout the world. Such factors may have a significant adverse effect on a Fund’s performance and have the potential to impair the ability of a Fund’s investment adviser, subadvisers, or other service providers to serve the Fund and could lead to disruptions that negatively impact the Fund.

7. Subsequent Events

Effective November 18, 2020, the Asset Momentum Fund changed its name to the MML Equity Momentum Fund.