MML Blend Fund —  Portfolio of Investments

March 31, 2021 (Unaudited)

	Number of Shares		Value
Mutual Funds — 104.2%
Diversified Financial Services — 104.2%
iShares 5-10 Year Investment Grade Corporate Bond ETF		497,160	$	29,446,787
iShares Core S&P 500 ETF		545,366		216,957,502
iShares Core S&P Mid-Cap ETF		65,904		17,153,493
iShares Core S&P Small-Cap ETF		70,551		7,656,900
iShares Core S&P Total US Stock Market ETF (a)		2,611,399		239,204,149
iShares Core Total USD Bond Market ETF		2,349,140		123,917,135
iShares Core U.S. Aggregate Bond ETF		1,088,787		123,936,624
iShares iBoxx High Yield Corporate Bond ETF (a)		347,578		30,301,850
State Street Navigator Securities Lending Prime Portfolio (b)		33,411,110		33,411,110
TOTAL MUTUAL FUNDS (Cost $782,167,933)				821,985,550
TOTAL LONG-TERM INVESTMENTS (Cost $782,167,933)				821,985,550

	Principal Amount
Short-Term Investments — 0.1%
Repurchase Agreement — 0.1%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/21, 0.000%, due 4/01/21 (c)	$	1,134,189	$	1,134,189
TOTAL SHORT-TERM INVESTMENTS (Cost $1,134,189)				1,134,189
TOTAL INVESTMENTS — 104.3% (Cost $783,302,122) (d)				823,119,739
Other Assets/(Liabilities) — (4.3)%				(34,212,584	)
NET ASSETS — 100.0%			$	788,907,155

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 March 31, 2021, was $35,803,758 or 4.54% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $3,139,938 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)	Represents investment of security lending cash collateral. (Note 2).
(c)	Maturity value of $1,134,189. Collateralized by U.S. Government Agency obligations with a rate of 1.750%, maturity date of 12/31/24, and an aggregate market value, including accrued interest, of $1,156,887.
(d)	See Note 3 for aggregate cost for federal tax purposes.

MML Dynamic Bond Fund —  Portfolio of Investments

March 31, 2021 (Unaudited)

	Principal Amount		Value
Bonds & Notes — 96.8%
Bank Loans — 3.8%
Advertising — 0.0%
Clear Channel Outdoor Holdings, Inc., Term Loan B, 3 mo. USD LIBOR + 3.500%
3.712% VRN 8/21/26	$	39,698	$	38,078
Terrier Media Buyer, Inc., 2021 Term Loan, 1 mo. USD LIBOR + 3.500%
3.609% VRN 12/17/26		59,252		58,667
				96,745
Aerospace & Defense — 0.1%
Spin Holdco, Inc., 2021 Term Loan, 3 mo. USD LIBOR + 4.000%
4.750% VRN 3/01/28		85,000		84,211
TransDigm, Inc., 2020 Term Loan F, 1 mo. USD LIBOR + 2.250%
2.359% VRN 12/09/25		169,591		165,916
				250,127
Airlines — 0.1%
AAdvantage Loyalty IP Ltd., 2021 Term Loan,
0.000% 4/20/28 (a)		120,000		122,813
American Airlines, Inc., 2017 Incremental Term Loan, 1 mo. USD LIBOR + 2.000%
2.106% VRN 12/15/23		74,081		70,686
Kestrel Bidco Inc., Term Loan B, 6 mo. USD LIBOR + 3.000%
4.000% VRN 12/11/26		69,063		66,926
				260,425
Auto Parts & Equipment — 0.1%
Clarios Global LP, 2021 USD Term Loan B, 3 mo. USD LIBOR + 3.250%
3.359% VRN 4/30/26		148,132		146,465
Biotechnology — 0.0%
Aldevron, L.L.C., 2021 Term Loan B, 1 mo. USD LIBOR + 3.250%
4.250% VRN 10/12/26		113,912		113,722
Building Materials — 0.0%
CP Atlas Buyer, Inc., 2021 Term Loan B, 3 mo. USD LIBOR + 3.750%
4.250% VRN 11/23/27		120,000		119,119
Chemicals — 0.1%
Diamond (BC) B.V., USD Term Loan, 1 mo. USD LIBOR + 3.000%
3.109% VRN 9/06/24		73,955		73,532
Illuminate Buyer, LLC, 2021 Term Loan, 1 mo. USD LIBOR + 3.500%
3.609% VRN 6/30/27		84,788		84,328
INEOS Styrolution US Holding LLC, 2021 USD Term Loan B, 3 mo. USD LIBOR + 2.750%
3.250% VRN 1/29/26		115,000		114,569
Solenis Holdings LLC, 2018 1st Lien Term Loan, 3 mo. USD LIBOR + 4.000%
4.190% VRN 6/26/25		73,604		73,301
				345,730
Commercial Services — 0.2%
AlixPartners, LLP, 2021 USD Term Loan B, 1 mo. USD LIBOR + 2.750%
3.250% VRN 2/04/28		100,000		99,569
Allied Universal Holdco LLC, 2019 Term Loan B, 1 mo. USD LIBOR + 4.250%
4.359% VRN 7/10/26		128,375		127,926
Mister Car Wash Holdings, Inc., 2019 Term Loan B, 1 mo. USD LIBOR + 3.250%
3.358% VRN 5/14/26		64,508		63,701
Parexel International Corp., Term Loan B, 1 mo. USD LIBOR + 2.750%
2.859% VRN 9/27/24		230,738		227,891
Prime Security Services Borrower LLC, 2021 Term Loan, 1 mo. USD LIBOR + 2.750%, 3 mo. USD LIBOR + 2.750%, 12 mo. USD LIBOR + 2.750%
3.500% VRN 9/23/26		130,430		129,819
Team Health Holdings, Inc., 1st Lien Term Loan, 1 mo. USD LIBOR + 2.750%
3.750% VRN 2/06/24		24,679		22,891
Verscend Holding Corp., 2018 Term Loan B,
0.000% 8/27/25 (a)		70,000		69,921
				741,718
Computers — 0.2%
Flexential Intermediate Corp., 2017 1st Lien Term Loan, 3 mo. USD LIBOR + 3.500%
3.703% VRN 8/01/24		29,616		27,548
Peraton Holding Corp.
Term Loan B,
0.000% 2/01/28 (a)		76,520		76,457
Term Loan B, 3 mo. USD LIBOR + 3.750%
4.500% VRN 2/01/28		43,480		43,443
Surf Holdings, LLC, USD Term Loan, 3 mo. USD LIBOR + 3.500%
3.676% VRN 3/05/27		129,025		127,661
Tempo Acquisition LLC, 2020 Extended Term Loan, 1 mo. USD LIBOR + 3.250%
3.750% VRN 11/02/26		201,261		201,094
				476,203
Distribution & Wholesale — 0.0%
American Tire Distributors Holdings, Inc., 2015 Term Loan, 1 mo. USD LIBOR + 7.500%
8.500% VRN 9/02/24		29,549		28,822

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Diversified Financial Services — 0.1%
Blackhawk Network Holdings, Inc., 2018 1st Lien Term Loan, 1 mo. USD LIBOR + 3.000%
3.109% VRN 6/15/25	$	114,841	$	113,077
Deerfield Dakota Holding LLC, 2020 USD Term Loan B, 1 mo. USD LIBOR + 3.750%
4.750% VRN 4/09/27		119,125		119,106
				232,183
Electric — 0.0%
Pacific Gas and Electric Co., 2020 Term Loan, 3 mo. USD LIBOR + 3.000%
3.500% VRN 6/23/25		74,438		74,275
Electrical Components & Equipment — 0.0%
Energizer Holdings, Inc., 2020 Term Loan, 1 mo. USD LIBOR + 2.250%
2.750% VRN 12/22/27		105,000		104,431
Electronics — 0.1%
Compass Power Generation LLC, 2018 Term Loan B, 1 mo. USD LIBOR + 3.500%
4.500% VRN 12/20/24		52,260		51,881
Tech Data Corp., ABL Term Loan, 1 mo. USD LIBOR + 3.500%
3.609% VRN 6/30/25		104,475		104,680
				156,561
Engineering & Construction — 0.0%
Brand Energy & Infrastructure Services, Inc., 2017 Term Loan, 3 mo. USD LIBOR + 4.250%
5.250% VRN 6/21/24		64,268		63,200
Entertainment — 0.1%
Caesars Resort Collection LLC
2017 1st Lien Term Loan B, 1 mo. USD LIBOR + 2.750%
2.859% VRN 12/23/24		157,557		155,128
2020 Term Loan B1, 1 mo. USD LIBOR + 4.500%
4.609% VRN 7/21/25		59,700		59,775
UFC Holdings LLC, 2021 Term Loan B, 6 mo. USD LIBOR + 3.000%
3.750% VRN 4/29/26		196,739		195,816
				410,719
Environmental Controls — 0.1%
Filtration Group Corp., 2018 1st Lien Term Loan, 1 mo. USD LIBOR + 3.000%
3.115% VRN 3/29/25		200,311		197,257
Food — 0.0%
H Food Holdings LLC, 2018 Term Loan B, 1 mo. USD LIBOR + 3.688%
3.796% VRN 5/23/25		49,303		48,779
United Natural Foods, Inc., Term Loan B, 1 mo. USD LIBOR + 3.500%
3.609% VRN 10/22/25		16,878		16,855
				65,634
Health Care – Products — 0.1%
Avantor Funding, Inc., 2020 Incremental Term Loan B4, 1 mo. USD LIBOR + 2.250%
3.250% VRN 11/08/27		129,675		129,610
Sotera Health Holdings LLC, 2021 Term Loan, 3 mo. USD LIBOR + 2.750%
3.250% VRN 12/11/26		90,000		89,663
				219,273
Health Care – Services — 0.2%
Air Methods Corp., 2017 Term Loan B, 3 mo. USD LIBOR + 3.500%
4.500% VRN 4/22/24		54,295		52,483
Envision Healthcare Corp., 2018 1st Lien Term Loan, 1 mo. USD LIBOR + 3.750%
3.859% VRN 10/10/25		79,343		68,268
Gentiva Health Services, Inc., 2020 Term Loan, 1 mo. USD LIBOR + 2.750%
2.875% VRN 7/02/25		173,064		171,838
Radiology Partners, Inc., 2018 1st Lien Term Loan B, 3 mo. USD LIBOR + 4.250%
5.295% - 5.295% VRN 7/09/25		120,000		118,950
RegionalCare Hospital Partners Holdings, Inc., 2018 Term Loan B, 1 mo. USD LIBOR + 3.750%
3.859% VRN 11/16/25		95,193		94,921
				506,460
Household Products & Wares — 0.0%
Kronos Acquisition Holdings, Inc., 2021 Term Loan B, 3 mo. USD LIBOR + 3.750%
4.250% VRN 12/22/26		119,700		117,861
Insurance — 0.3%
Acrisure LLC, 2020 Term Loan B, 3 mo. USD LIBOR + 3.500%
3.703% VRN 2/13/27		123,120		121,479
AssuredPartners, Inc., 2020 Term Loan B, 1 mo. USD LIBOR + 3.500%
3.609% VRN 2/12/27		241,237		238,323
Asurion LLC
2018 Term Loan B6, 1 mo. USD LIBOR + 3.000%
3.109% VRN 11/03/23		70,273		70,039
2020 Term Loan B8, 1 mo. USD LIBOR + 3.250%
3.359% VRN 12/23/26		154,613		153,536
OneDigital Borrower LLC
2020 Delayed Draw Term Loan,
0.000% 11/16/27 (a) (b)		15,273		15,261
2020 Term Loan, 3 mo. USD LIBOR + 4.500%
5.250% VRN 11/16/27		154,727		154,598
Sedgwick Claims Management Services, Inc., 2019 Term Loan B, 1 mo. USD LIBOR + 3.750%
3.859% VRN 9/03/26		34,388		34,161
				787,397

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Internet — 0.2%
Arches Buyer, Inc., 2021 Term Loan B, 1 mo. USD LIBOR + 3.250%
3.750% VRN 12/06/27	$	119,700	$	118,742
Endure Digital, Inc., Term Loan, 3 mo. USD LIBOR + 3.500%
4.250% VRN 2/10/28		140,000		138,355
Getty Images, Inc., 2019 USD Term Loan B, 1 mo. USD LIBOR + 4.500%
4.609% VRN 2/19/26		34,184		33,798
ION Trading Finance Limited, 2021 Term Loan,
0.000% 3/26/28 (a)		230,000		229,713
ION Trading Technologies S.a.r.l., USD Incremental Term Loan B, 3 mo. USD LIBOR + 4.000%
5.000% VRN 11/21/24		19,690		19,676
Uber Technologies, Inc., 2021 1st Lien Term Loan B, 1 mo. USD LIBOR + 3.500%
3.609% VRN 4/04/25		194,500		193,446
				733,730
Leisure Time — 0.0%
ClubCorp Holdings, Inc., 2017 Term Loan B, 3 mo. USD LIBOR + 2.750%
2.953% VRN 9/18/24		59,488		55,788
Machinery – Diversified — 0.1%
Titan Acquisition Ltd., 2018 Term Loan B, 6 mo. USD LIBOR + 3.000%
3.267% VRN 3/28/25		39,491		38,635
Vertical Midco GmbH, USD Term Loan B, 6 mo. USD LIBOR + 4.250%
4.478% VRN 7/30/27		199,001		199,300
				237,935
Media — 0.1%
Cengage Learning, Inc., 2016 Term Loan B, 3 mo. USD LIBOR + 4.250%
5.250% VRN 6/07/23		73,914		73,037
The E.W. Scripps Co., 2019 Term Loan B2, 1 mo. USD LIBOR + 2.563%
3.313% VRN 5/01/26		115,982		115,224
Radiate Holdco, LLC, 2020 Term Loan, 1 mo. USD LIBOR + 3.500%
4.250% VRN 9/25/26		134,663		134,525
				322,786
Packaging & Containers — 0.1%
Flex Acquisition Co., Inc., 2018 Incremental Term Loan, 3 mo. USD LIBOR + 3.000%
3.202% VRN 6/29/25		24,707		24,275
Graham Packaging Company, Inc., 2021 Term Loan, 1 mo. USD LIBOR + 3.000%
3.750% VRN 8/04/27		78,373		77,830
TricorBraun Holdings, Inc.
2021 Delayed Draw Term Loan, 3 mo. USD LIBOR + 3.250%
3.750% VRN 2/03/28 (b)		12,854		12,720
2021 Term Loan, 3 mo. USD LIBOR + 3.250%
3.750% VRN 2/03/28		57,146		56,550
				171,375
Pharmaceuticals — 0.1%
Gainwell Acquisition Corp., Term Loan B, 3 mo. USD LIBOR + 4.000%
4.750% VRN 10/01/27		124,688		124,064
HC Group Holdings II, Inc., Term Loan B, 1 mo. USD LIBOR + 3.750%
3.859% VRN 8/06/26		153,832		153,159
				277,223
Pipelines — 0.0%
Blackstone CQP Holdco LP, Term Loan B, 3 mo. USD LIBOR + 3.500%
3.687% VRN 9/30/24		78,995		78,749
Retail — 0.2%
Foundation Building Materials Holding Co. LLC
2021 Delayed Draw Term Loan, 1 mo. USD LIBOR + 3.250%
3.750% VRN 2/03/28		25,649		25,386
2021 Term Loan, 1 mo. USD LIBOR + 3.250%
3.750% VRN 2/03/28		44,351		43,896
Great Outdoors Group LLC, 2021 Term Loan B, 6 mo. USD LIBOR + 4.250%
5.000% VRN 3/06/28		174,563		174,650
Harbor Freight Tools USA, Inc., 2020 Term Loan B, 1 mo. USD LIBOR + 3.000%
3.750% VRN 10/19/27		99,750		99,568
IRB Holding Corp, 2020 Term Loan B, 3 mo. USD LIBOR + 2.750%, 6 mo. USD LIBOR + 2.750%
2.953% VRN 2/05/25		152,530		151,161
Petco Animal Supplies, Inc., 2021 Term Loan B, 3 mo. USD LIBOR + 3.250%
4.000% VRN 2/24/28		125,000		124,434
PetSmart, Inc., 2021 Term Loan B, 3 mo. USD LIBOR + 3.750%
4.500% VRN 2/12/28		70,000		69,839
				688,934

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Software — 1.0%
Applied Systems, Inc., 2017 1st Lien Term Loan, 3 mo. USD LIBOR + 3.000%
3.500% VRN 9/19/24	$	130,000	$	129,415
Ascend Learning LLC, 2017 Term Loan B, 1 mo. USD LIBOR + 3.000%
4.000% VRN 7/12/24		157,426		156,600
Camelot U.S. Acquisition 1 Co., 2020 Incremental Term Loan B, 1 mo. USD LIBOR + 3.000%
4.000% VRN 10/30/26		119,700		119,580
Castle US Holding Corp., USD Term Loan B, 3 mo. USD LIBOR + 3.750%
3.953% VRN 1/29/27		158,667		156,683
Cornerstone OnDemand, Inc., Term Loan B, 1 mo. USD LIBOR + 4.250%
4.361% VRN 4/22/27		76,338		76,350
Cvent, Inc., 1st Lien Term Loan, 2 mo. USD LIBOR + 3.750%
3.900% VRN 11/29/24		98,728		95,917
DCert Buyer, Inc., 2019 Term Loan B, 1 mo. USD LIBOR + 4.000%
4.109% VRN 10/16/26		74,811		74,614
The Dun & Bradstreet Corp., Term Loan, 1 mo. USD LIBOR + 3.250%
3.359% VRN 2/06/26		173,403		172,319
Finastra USA, Inc.
USD 1st Lien Term Loan, 3 mo. USD LIBOR + 3.500%
4.500% VRN 6/13/24		63,671		62,336
USD 2nd Lien Term Loan, 6 mo. USD LIBOR + 7.250%
8.250% VRN 6/13/25		20,000		20,075
Greeneden U.S. Holdings II, LLC, 2020 USD Term Loan B4, 1 mo. USD LIBOR + 4.000%
4.750% VRN 12/01/27		248,399		248,212
Helios Software Holdings, Inc., 2021 USD Term Loan B, 3 mo. USD LIBOR + 3.750%
3.930% VRN 3/05/28		240,000		238,051
Hyland Software, Inc., 2018 1st Lien Term Loan, 1 mo. USD LIBOR + 3.500%
4.250% VRN 7/01/24		222,144		221,798
Mitchell International, Inc., 2017 1st Lien Term Loan, 1 mo. USD LIBOR + 3.250%
3.359% VRN 11/29/24		148,092		145,583
Playtika Holding Corp, 2021 Term Loan,
0.000% 3/13/28 (a)		150,000		149,063
Project Alpha Intermediate Holding, Inc., 2021 Term Loan B, 1 mo. USD LIBOR + 4.000%
4.110% VRN 4/26/24		187,787		187,083
Rackspace Hosting, Inc., 2021 Term Loan, 3 mo. USD LIBOR + 2.750%
3.500% VRN 2/15/28		145,000		143,595
RealPage, Inc., Term Loan,
0.000% 2/17/28 (a)		125,000		124,358
Sophia, L.P., 2020 1st Lien Term Loan, 3 mo. USD LIBOR + 3.750%
4.500% VRN 10/07/27		149,625		149,438
Tibco Software, Inc., 2020 Term Loan B3, 1 mo. USD LIBOR + 3.750%
3.860% VRN 6/30/26		128,988		127,174
The Ultimate Software Group, Inc.
Term Loan B, 1 mo. USD LIBOR + 3.750%
3.859% VRN 5/04/26		123,419		123,209
2021 Incremental Term Loan, 3 mo. USD LIBOR + 3.250%
4.000% VRN 5/04/26		104,476		104,476
VS Buyer, LLC, Term Loan B, 1 mo. USD LIBOR + 3.000%
3.109% VRN 2/28/27		148,550		147,869
				3,173,798
Telecommunications — 0.2%
Altice France S.A., 2018 Term Loan B13, 3 mo. USD LIBOR + 4.000%
4.198% VRN 8/14/26		153,707		153,169
Avaya, Inc.
2021 Term Loan B2, 1 mo. USD LIBOR + 4.000%
4.106% VRN 12/15/27		140,000		139,901
2020 Term Loan B, 1 mo. USD LIBOR + 4.250%
4.356% VRN 12/15/27		38,781		38,775
Delta TopCo, Inc., 2020 Term Loan B, 3 mo. USD LIBOR + 3.750%
4.500% VRN 12/01/27		70,000		69,850
Intelsat Jackson Holdings S.A.
2020 DIP Term Loan, 3 mo. USD LIBOR + 3.600%, 3 mo. USD LIBOR + 5.500%
3.600% - 6.500% VRN 7/13/22		23,306		23,551
2017 Term Loan B3, 1 mo. USD LIBOR + 4.750%
8.000% VRN 11/27/23		155,000		157,325
Zayo Group Holdings, Inc., USD Term Loan, 1 mo. USD LIBOR + 3.000%
3.109% VRN 3/09/27		59,882		59,356
				641,927
TOTAL BANK LOANS (Cost $11,887,878)				11,896,572
Corporate Debt — 24.6%
Advertising — 0.1%
The Interpublic Group of Cos., Inc.
5.400% 10/01/48		250,000		307,110

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Aerospace & Defense — 0.4%
The Boeing Co.
2.950% 2/01/30	$	235,000	$	232,299
Northrop Grumman Corp.
5.150% 5/01/40		250,000		312,918
Teledyne Technologies, Inc.
2.250% 4/01/28		205,000		203,857
TransDigm, Inc.
5.500% 11/15/27		100,000		103,375
6.250% 3/15/26 (c)		150,000		158,985
6.375% 6/15/26		60,000		62,025
8.000% 12/15/25 (c)		15,000		16,335
Triumph Group, Inc.
7.750% 8/15/25		55,000		55,275
				1,145,069
Agriculture — 0.3%
Altria Group, Inc.
4.800% 2/14/29		71,000		81,694
BAT Capital Corp.
3.462% 9/06/29		545,000		568,151
Imperial Brands Finance PLC
3.500% 7/26/26 (c)		265,000		283,034
				932,879
Airlines — 0.1%
American Airlines, Inc. /AAdvantage Loyalty IP Ltd.
5.750% 4/20/29 (c)		125,000		133,225
Mileage Plus Holdings LLC / Mileage Plus Intellectual Property Assets Ltd.
6.500% 6/20/27 (c)		100,000		109,500
Southwest Airlines Co.
4.750% 5/04/23		200,000		215,931
				458,656
Auto Manufacturers — 0.5%
Ford Motor Co.
9.000% 4/22/25		65,000		78,722
Ford Motor Credit Co. LLC 3 mo. USD LIBOR + 1.235%
1.429% FRN 2/15/23		210,000		207,912
General Motors Financial Co., Inc. 3 mo. USD LIBOR + .990%
1.228% FRN 1/05/23		575,000		579,919
Hyundai Capital America
1.800% 10/15/25 (c)		5,000		4,993
2.650% 2/10/25 (c)		410,000		423,384
Volkswagen Group of America Finance LLC
4.250% 11/13/23 (c)		220,000		239,082
				1,534,012
Auto Parts & Equipment — 0.0%
Clarios Global LP/Clarios US Finance Co.
6.250% 5/15/26 (c)		115,000		122,135
Banks — 3.8%
Banco BBVA Peru SA 5 year CMT + 2.750%
5.250% VRN 9/22/29 (c)		100,000		107,750
Banco de Credito del Peru
5 year CMT + 3.000% 3.125% VRN 7/01/30 (c)		200,000		200,000
3 mo. USD LIBOR + 7.043% 6.125% VRN 4/24/27 (c)		150,000		157,126
Banco de Reservas de la Republica Dominicana
7.000% 2/01/23 (c)		200,000		208,002
Banco do Estado do Rio Grande do Sul SA 5 year CMT + 4.928%
5.375% VRN 1/28/31 (c)		200,000		196,200
Banco Internacional del Peru SAA Interbank 1 year CMT + 3.711%
4.000% VRN 7/08/30 (c)		150,000		152,944
Banco Macro SA 5 year USD Swap + 5.463%
6.750% VRN 11/04/26 (c)		200,000		160,002
Banco Mercantil del Norte SA
7.625% VRN (c) (d)		200,000		218,802
Banco Santander SA 3 mo. USD LIBOR + 1.090%
1.265% FRN 2/23/23		400,000		404,609
Bangkok Bank PCL
5.000% VRN (c) (d)		200,000		210,250
Bank of America Corp. 3 mo. USD LIBOR + 1.210%
3.974% VRN 2/07/30		350,000		386,686
Bank of Montreal 5 year USD Swap + 1.432%
3.803% VRN 12/15/32		225,000		247,012
Bank of New Zealand
3.500% 2/20/24 (c)		280,000		301,265
The Bank of Nova Scotia
1.625% 5/01/23		142,000		145,578
3.400% 2/11/24		100,000		107,372
Barclays PLC 3 mo. USD LIBOR + 1.380%
1.574% FRN 5/16/24		425,000		431,072

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
BNP Paribas SA SOFR + 1.507%
3.052% VRN 1/13/31 (c)	$	390,000	$	400,489
BPCE SA
1.000% 1/20/26 (c)		250,000		243,841
Citigroup, Inc. 3 mo. USD LIBOR + 1.100%
1.292% FRN 5/17/24		560,000		568,041
Commonwealth Bank of Australia
4.316% 1/10/48 (c)		305,000		336,296
Credit Agricole SA
3.750% 4/24/23 (c)		285,000		302,934
Credit Suisse Group AG SOFR + .980%
1.305% VRN 2/02/27 (c)		500,000		484,119
DBS Group Holdings Ltd. 5 year USD Swap + 2.390%
3.600% VRN (c) (d)		400,000		402,000
Gilex Holding Sarl
8.500% 5/02/23 (c)		150,000		153,750
8.500% 5/02/23 (c)		150,000		153,750
The Goldman Sachs Group, Inc. 3 mo. USD LIBOR + 1.170%
1.364% FRN 5/15/26		490,000		497,205
HSBC Holdings PLC 3 mo. USD LIBOR + 1.380%
1.564% FRN 9/12/26		510,000		525,793
JP Morgan Chase & Co. SOFR + 2.040%
2.522% VRN 4/22/31		275,000		273,252
Lloyds Banking Group PLC 3 mo. USD LIBOR + 1.205%
3.574% VRN 11/07/28		400,000		431,685
Macquarie Group Ltd.
3 mo. USD LIBOR + 1.023% 3.189% VRN 11/28/23 (c)		60,000		62,452
3 mo. USD LIBOR + 1.330% 4.150% VRN 3/27/24 (c)		280,000		298,383
Malayan Banking Bhd 5 year USD Swap + 2.542%
3.905% VRN 10/29/26 (c)		300,000		303,966
Mitsubishi UFJ Financial Group, Inc.
1.412% 7/17/25		435,000		434,543
Morgan Stanley 3 mo. USD LIBOR + 1.340%
3.591% VRN 7/22/28		230,000		250,605
Multibank, Inc.
4.375% 11/09/22 (c)		200,000		205,100
NongHyup Bank
1.250% 7/20/25 (c)		200,000		198,798
Oversea-Chinese Banking Corp. Ltd. 5 year CMT + 1.580%
1.832% VRN 9/10/30 (c)		300,000		297,393
Sumitomo Mitsui Financial Group, Inc. 3 mo. USD LIBOR + .740%
0.963% FRN 1/17/23		615,000		619,271
United Overseas Bank Ltd.
5 year USD Swap + 1.654% 2.880% VRN 3/08/27 (c)		200,000		203,114
5 year USD Swap + 1.794% 3.875% VRN (c) (d)		300,000		309,900
Wells Fargo & Co.
3 mo. USD LIBOR + 1.170% 2.879% VRN 10/30/30		115,000		118,383
3 mo. USD LIBOR + 1.170% 3.196% VRN 6/17/27		195,000		208,909
				11,918,642
Beverages — 0.3%
Anheuser-Busch InBev Worldwide, Inc.
4.600% 4/15/48		355,000		405,970
Constellation Brands, Inc.
2.875% 5/01/30		25,000		25,527
3.150% 8/01/29		200,000		209,352
Keurig Dr Pepper, Inc.
3.800% 5/01/50		190,000		201,320
Triton Water Holdings, Inc.
6.250% 4/01/29 (c)		65,000		66,300
				908,469
Biotechnology — 0.1%
Illumina, Inc.
0.550% 3/23/23		145,000		144,873
Royalty Pharma PLC
3.300% 9/02/40 (c)		200,000		192,326
				337,199
Building Materials — 0.2%
Builders FirstSource, Inc.
6.750% 6/01/27 (c)		98,000		105,105
Carrier Global Corp.
3.377% 4/05/40		235,000		232,611
Griffon Corp.
5.750% 3/01/28		170,000		181,178
Owens Corning
4.400% 1/30/48		175,000		190,212
				709,106

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Chemicals — 0.2%
DuPont de Nemours, Inc.
5.419% 11/15/48	$	155,000	$	199,257
MEGlobal Canada ULC
5.000% 5/18/25 (c)		200,000		222,250
Nutrien Ltd.
4.200% 4/01/29		265,000		298,038
				719,545
Coal — 0.0%
Peabody Energy Corp.
8.500% 12/31/24 (c)		45,000		18,900
SunCoke Energy Partners LP/SunCoke Energy Partners Finance Corp.
7.500% 6/15/25 (c)		120,000		124,650
				143,550
Commercial Services — 0.3%
Allied Universal Holdco LLC / Allied Universal Finance Corp.
6.625% 7/15/26 (c)		70,000		74,234
9.750% 7/15/27 (c)		130,000		142,636
Garda World Security Corp.
8.750% 5/15/25 (c)		95,000		99,394
Jaguar Holding Co. II / Pharmaceutical Product Development LLC
5.000% 6/15/28 (c)		50,000		52,075
MPH Acquisition Holdings LLC
5.750% 11/01/28 (c)		120,000		117,672
NESCO Holdings II, Inc.
5.500% 4/15/29 (c) (e)		20,000		20,510
Prime Security Services Borrower LLC / Prime Finance, Inc.
3.375% 8/31/27 (c)		110,000		106,700
PSA Treasury Pte Ltd.
2.125% 9/05/29 (c)		200,000		197,821
Verscend Escrow Corp.
9.750% 8/15/26 (c)		237,000		254,116
				1,065,158
Computers — 0.3%
Dell International LLC / EMC Corp.
5.300% 10/01/29 (c)		375,000		438,394
Fortinet, Inc.
1.000% 3/15/26		215,000		210,108
NetApp, Inc.
1.875% 6/22/25		230,000		234,685
				883,187
Distribution & Wholesale — 0.0%
Performance Food Group, Inc.
5.500% 10/15/27 (c)		115,000		120,262
Diversified Financial Services — 1.5%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust
3.500% 1/15/25		180,000		188,701
Air Lease Corp.
3.750% 2/01/22		125,000		127,587
Aircastle Ltd.
2.850% 1/26/28 (c)		215,000		204,639
Aviation Capital Group LLC
5.500% 12/15/24 (c)		205,000		229,198
Avolon Holdings Funding Ltd.
3.250% 2/15/27 (c)		265,000		262,694
BOC Aviation Ltd. 3 mo. USD LIBOR + 1.125%
1.320% FRN 9/26/23 (c)		340,000		339,173
Capital One Financial Corp. 3 mo. USD LIBOR + .720%
0.932% FRN 1/30/23		65,000		65,469
The Charles Schwab Corp.
0.750% 3/18/24		50,000		50,256
3.550% 2/01/24		340,000		367,335
Credito Real SAB de CV SOFOM ER 5 year CMT + 7.026%
9.125% VRN (c) (d)		200,000		179,000
Discover Financial Services
4.100% 2/09/27		390,000		432,614
Global Aircraft Leasing Co. Ltd.
6.500% 9/15/24 (c)		112,750		108,127
Interoceanica IV Finance Ltd.
0.000% 11/30/25 (c)		624,586		592,632
Nationstar Mortgage Holdings, Inc.
5.500% 8/15/28 (c)		75,000		75,304
Navient Corp.
5.000% 3/15/27		60,000		60,150
NFP Corp.
6.875% 8/15/28 (c)		70,000		72,702
OneMain Finance Corp.
6.625% 1/15/28		120,000		135,997

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
PennyMac Financial Services, Inc.
4.250% 2/15/29 (c)	$	120,000	$	114,750
SPARC EM SPC Panama Metro Line 2 SP
0.000% 12/05/22 (c)		100,819		98,300
Synchrony Financial
3.950% 12/01/27		320,000		344,597
Unifin Financiera SAB de CV 5 year CMT + 6.308%
8.875% VRN (c) (d)		300,000		246,000
The Western Union Co.
2.750% 3/15/31		425,000		406,242
				4,701,467
Electric — 3.5%
AES Andres BV/Dominican Power Partners/Empresa Generadora de Electricidad It
7.950% 5/11/26 (c)		300,000		311,253
AES Argentina Generacion SA
7.750% 2/02/24 (c)		150,000		119,626
AES Gener SA 5 year USD Swap + 4.644%
7.125% VRN 3/26/79 (c)		200,000		214,750
American Electric Power Co., Inc.
2.950% 12/15/22		313,000		323,466
Arizona Public Service Co.
3.350% 5/15/50		130,000		128,415
Calpine Corp.
4.625% 2/01/29 (c)		40,000		38,972
5.125% 3/15/28 (c)		100,000		100,465
Chile Electricity PEC SpA
0.000% 1/25/28 (c)		200,000		162,800
DTE Energy Co.
3.800% 3/15/27		500,000		550,383
Duke Energy Corp.
3.950% 8/15/47		240,000		246,893
Duke Energy Progress, Inc.
4.150% 12/01/44		240,000		270,682
Empresa Electrica Angamos SA
4.875% 5/25/29 (c)		147,800		147,800
Empresa Electrica Guacolda SA
4.560% 4/30/25 (c)		400,000		335,961
Entergy Corp.
2.800% 6/15/30		110,000		110,687
Eversource Energy
1.650% 8/15/30		250,000		231,682
Fenix Power Peru SA
4.317% 9/20/27 (c)		258,529		270,489
Georgia Power Co.
2.200% 9/15/24		385,000		401,625
3.250% 3/15/51		355,000		337,839
Korea East-West Power Co. Ltd.
1.750% 5/06/25 (c)		200,000		203,850
1.750% 5/06/25 (c)		200,000		203,850
LLPL Capital Pte Ltd.
6.875% 2/04/39 (c)		273,600		318,881
Minejesa Capital BV
4.625% 8/10/30 (c)		400,000		416,500
Monongahela Power Co.
5.400% 12/15/43 (c)		145,000		178,136
NextEra Energy Capital Holdings, Inc.
2.250% 6/01/30		750,000		733,266
3.550% 5/01/27		195,000		213,071
NRG Energy, Inc.
2.000% 12/02/25 (c)		145,000		144,992
3.625% 2/15/31 (c)		145,000		141,375
Pacific Gas and Electric Co.
1.367% 3/10/23		240,000		240,068
2.500% 2/01/31		230,000		217,035
Pampa Energia SA
9.125% 4/15/29 (c)		150,000		124,875
PG&E Corp.
5.000% 7/01/28		45,000		47,541
Pike Corp.
5.500% 9/01/28 (c)		85,000		86,488
PSEG Power LLC
3.850% 6/01/23		260,000		277,078
Sierra Pacific Power Co.
2.600% 5/01/26		1,000,000		1,054,183
The Southern Co.
3.700% 4/30/30		500,000		539,890
Transelec SA
3.875% 1/12/29 (c)		250,000		272,287
Xcel Energy, Inc.
3.300% 6/01/25		1,000,000		1,072,493
				10,789,647

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Electrical Components & Equipment — 0.0%
Energizer Holdings, Inc.
4.750% 6/15/28 (c)	$	110,000	$	113,438
Electronics — 0.1%
Arrow Electronics, Inc.
3.875% 1/12/28		195,000		211,501
Vontier Corp.
2.400% 4/01/28 (c)		115,000		112,986
				324,487
Energy – Alternate Sources — 0.2%
Empresa Electrica Cochrane SpA
5.500% 5/14/27 (c)		361,120		377,339
UEP Penonome II SA
6.500% 10/01/38 (c)		200,000		201,502
				578,841
Engineering & Construction — 0.2%
Sydney Airport Finance Co. Pty Ltd.
3.375% 4/30/25 (c)		300,000		319,183
3.625% 4/28/26 (c)		300,000		323,383
				642,566
Entertainment — 0.4%
Bally's Corp.
6.750% 6/01/27 (c)		135,000		144,788
Caesars Entertainment, Inc.
6.250% 7/01/25 (c)		105,000		111,699
Caesars Resort Collection LLC/CRC Finco, Inc.
5.250% 10/15/25 (c)		130,000		131,126
Cedar Fair LP
5.250% 7/15/29		75,000		77,250
Lions Gate Capital Holdings LLC
5.500% 4/15/29 (c) (e)		80,000		80,009
6.375% 2/01/24 (c)		160,000		165,101
Live Nation Entertainment, Inc.
6.500% 5/15/27 (c)		90,000		99,789
Scientific Games International, Inc.
7.250% 11/15/29 (c)		75,000		81,375
Six Flags Theme Parks, Inc.
7.000% 7/01/25 (c)		180,000		194,800
				1,085,937
Environmental Controls — 0.1%
GFL Environmental, Inc.
3.500% 9/01/28 (c)		140,000		135,800
4.000% 8/01/28 (c)		140,000		135,450
				271,250
Food — 0.5%
Albertsons Cos., Inc. / Safeway, Inc. / New Albertsons LP / Albertson's LLC
3.500% 3/15/29 (c)		75,000		71,373
B&G Foods, Inc.
5.250% 9/15/27		50,000		52,031
Campbell Soup Co.
2.375% 4/24/30		115,000		112,396
Flowers Foods, Inc.
2.400% 3/15/31		100,000		97,471
Kraft Heinz Foods Co.
5.000% 7/15/35		40,000		46,025
5.200% 7/15/45		115,000		132,672
Mondelez International, Inc.
1.875% 10/15/32		135,000		125,678
Post Holdings, Inc.
4.625% 4/15/30 (c)		110,000		110,209
Smithfield Foods, Inc.
4.250% 2/01/27 (c)		365,000		402,036
Sysco Corp.
3.300% 2/15/50		330,000		307,265
United Natural Foods, Inc.
6.750% 10/15/28 (c)		75,000		80,156
US Foods, Inc.
6.250% 4/15/25 (c)		15,000		16,080
				1,553,392
Gas — 0.3%
The Brooklyn Union Gas Co.
4.487% 3/04/49 (c)		255,000		290,046
The East Ohio Gas Co.
3.000% 6/15/50 (c)		245,000		227,236
ENN Energy Holdings Ltd.
3.250% 7/24/22 (c)		200,000		204,994
NiSource, Inc.
3.600% 5/01/30		110,000		119,144
				841,420

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Health Care – Products — 0.0%
Ortho-Clinical Diagnostics, Inc. / Ortho-Clinical Diagnostics SA
7.250% 2/01/28 (c)	$	84,000	$	92,035
Health Care – Services — 0.6%
Anthem, Inc.
2.375% 1/15/25		140,000		146,275
Centene Corp.
2.500% 3/01/31		310,000		295,275
3.000% 10/15/30		60,000		59,900
CHS/Community Health Systems, Inc.
6.000% 1/15/29 (c)		95,000		100,463
6.875% 4/15/29 (c)		70,000		73,168
HCA, Inc.
4.125% 6/15/29		175,000		193,814
Health Care Service Corp.
3.200% 6/01/50 (c)		50,000		47,151
Legacy LifePoint Health LLC
4.375% 2/15/27 (c)		90,000		88,200
6.750% 4/15/25 (c)		55,000		58,438
Radiology Partners, Inc.
9.250% 2/01/28 (c)		95,000		103,431
RP Escrow Issuer LLC
5.250% 12/15/25 (c)		105,000		108,806
Select Medical Corp.
6.250% 8/15/26 (c)		150,000		159,414
Tenet Healthcare Corp.
5.125% 11/01/27 (c)		155,000		162,084
6.125% 10/01/28 (c)		130,000		135,395
				1,731,814
Home Builders — 0.0%
Mattamy Group Corp.
4.625% 3/01/30 (c)		120,000		119,194
Home Furnishing — 0.0%
Tempur Sealy International, Inc.
4.000% 4/15/29 (c)		60,000		59,700
Household Products & Wares — 0.1%
Kronos Acquisition Holdings, Inc. / KIK Custom Products, Inc.
5.000% 12/31/26 (c)		100,000		100,000
7.000% 12/31/27 (c)		65,000		62,294
Spectrum Brands, Inc.
3.875% 3/15/31 (c)		105,000		102,638
				264,932
Insurance — 0.4%
Acrisure LLC / Acrisure Finance, Inc.
4.250% 2/15/29 (c)		125,000		122,931
Alliant Holdings Intermediate LLC / Alliant Holdings Co-Issuer
6.750% 10/15/27 (c)		80,000		85,853
Athene Global Funding
3.000% 7/01/22 (c)		325,000		335,022
Berkshire Hathaway Finance Corp.
2.850% 10/15/50		140,000		128,602
GTCR AP Finance, Inc.
8.000% 5/15/27 (c)		95,000		102,006
Prudential Financial, Inc.
3.905% 12/07/47		185,000		199,576
Willis North America, Inc.
4.500% 9/15/28		290,000		329,623
				1,303,613
Internet — 0.3%
Endure Digital, Inc.
6.000% 2/15/29 (c)		95,000		92,744
Expedia Group, Inc.
2.950% 3/15/31 (c)		85,000		83,755
3.800% 2/15/28		200,000		211,724
JD.com, Inc.
3.375% 1/14/30		400,000		411,983
Uber Technologies, Inc.
7.500% 9/15/27 (c)		90,000		99,454
				899,660
Investment Companies — 0.2%
Ares Capital Corp.
2.150% 7/15/26		210,000		204,211
Temasek Financial I Ltd. Co.
1.000% 10/06/30 (c)		350,000		320,628
				524,839

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Iron & Steel — 0.2%
CSN Islands XII Corp.
7.000% (c) (d)	$	100,000	$	100,250
POSCO
2.375% 1/17/23 (c)		200,000		205,378
2.750% 7/15/24 (c)		200,000		211,008
				516,636
Leisure Time — 0.1%
Carnival Corp.
11.500% 4/01/23 (c)		30,000		34,387
5.750% 3/01/27 (c)		95,000		97,656
Viking Cruises Ltd.
13.000% 5/15/25 (c)		30,000		35,269
5.875% 9/15/27 (c)		160,000		156,400
				323,712
Lodging — 0.2%
Boyd Gaming Corp.
4.750% 12/01/27		150,000		152,884
Hilton Domestic Operating Co., Inc.
5.375% 5/01/25 (c)		20,000		21,080
5.750% 5/01/28 (c)		20,000		21,525
Marriott International, Inc.
3.125% 6/15/26		200,000		209,069
MGM Resorts International
6.750% 5/01/25		135,000		145,125
Wyndham Hotels & Resorts, Inc.
4.375% 8/15/28 (c)		75,000		75,863
				625,546
Media — 0.4%
CCO Holdings LLC/CCO Holdings Capital Corp.
4.750% 3/01/30 (c)		105,000		108,806
Cengage Learning, Inc.
9.500% 6/15/24 (c)		85,000		86,594
Charter Communications Operating LLC/Charter Communications Operating Capital
4.908% 7/23/25		325,000		368,602
Comcast Corp.
3.400% 4/01/30		195,000		210,977
Diamond Sports Group LLC/Diamond Sports Finance Co.
5.375% 8/15/26 (c)		50,000		35,988
DISH DBS Corp.
5.875% 11/15/24		40,000		41,862
GCI LLC
4.750% 10/15/28 (c)		90,000		92,137
iHeartCommunications, Inc.
8.375% 5/01/27		25,000		26,844
Nexstar Broadcasting, Inc.
5.625% 7/15/27 (c)		65,000		68,330
Radiate Holdco LLC / Radiate Finance, Inc.
4.500% 9/15/26 (c)		75,000		75,844
Scripps Escrow II, Inc.
3.875% 1/15/29 (c)		40,000		39,300
Scripps Escrow, Inc.
5.875% 7/15/27 (c)		80,000		82,392
				1,237,676
Mining — 0.4%
Anglo American Capital PLC
4.500% 3/15/28 (c)		385,000		431,890
Arconic Corp.
6.125% 2/15/28 (c)		130,000		138,866
Novelis Corp.
4.750% 1/30/30 (c)		50,000		51,506
Vedanta Resources Co.
9.250% 4/23/26 (c)		200,000		168,244
Vedanta Resources Ltd.
6.125% 8/09/24 (c)		400,000		321,500
				1,112,006
Miscellaneous - Manufacturing — 0.2%
Bombardier, Inc.
6.000% 10/15/22 (c)		90,000		90,000
General Electric Co.
5.875% 1/14/38		210,000		271,439
6.875% 1/10/39		110,000		154,279
				515,718

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Oil & Gas — 1.5%
Apache Corp.
4.375% 10/15/28	$	60,000	$	59,820
4.625% 11/15/25		40,000		41,212
BP Capital Markets America, Inc.
2.939% 6/04/51		140,000		124,563
Chesapeake Energy Corp.
5.875% 2/01/29 (c)		100,000		106,000
CNX Resources Corp.
6.000% 1/15/29 (c)		65,000		67,547
Cosan Overseas Ltd.
8.250% (c) (d)		500,000		510,000
Delek & Avner Tamar Bond Ltd.
5.082% 12/30/23 (c)		100,000		103,450
Diamondback Energy, Inc.
0.900% 3/24/23		125,000		124,982
2.875% 12/01/24		124,000		130,752
EQT Corp.
8.500% STEP 2/01/30		50,000		63,765
Exxon Mobil Corp.
2.610% 10/15/30		165,000		167,837
4.227% 3/19/40		190,000		214,111
Gran Tierra Energy International Holdings Ltd.
6.250% 2/15/25 (c)		400,000		331,000
Hilcorp Energy I LP / Hilcorp Finance Co.
5.750% 2/01/29 (c)		45,000		45,394
6.250% 11/01/28 (c)		100,000		103,000
Indigo Natural Resources LLC
5.375% 2/01/29 (c)		75,000		73,891
Marathon Petroleum Corp.
5.125% 12/15/26		310,000		361,582
Medco Bell Pte Ltd.
6.375% 1/30/27 (c)		200,000		200,600
MEG Energy Corp.
5.875% 2/01/29 (c)		15,000		15,038
7.125% 2/01/27 (c)		105,000		109,987
Occidental Petroleum Corp.
3.500% 8/15/29		65,000		60,937
6.125% 1/01/31		85,000		93,857
6.625% 9/01/30		60,000		67,428
8.000% 7/15/25		50,000		57,396
Ovintiv Exploration, Inc.
5.625% 7/01/24		95,000		104,428
Ovintiv, Inc.
7.375% 11/01/31		55,000		69,877
Parkland Corp.
4.500% 10/01/29 (c) (e)		90,000		90,310
Petronas Capital Ltd.
3.500% 4/21/30 (c)		200,000		213,922
Pioneer Natural Resources Co.
1.900% 8/15/30		300,000		278,728
PTTEP Treasury Center Co. Ltd.
2.587% 6/10/27 (c)		200,000		205,668
Sunoco LP / Sunoco Finance Corp.
4.500% 5/15/29 (c)		35,000		34,869
5.500% 2/15/26		130,000		133,548
6.000% 4/15/27		90,000		94,500
Transocean Poseidon Ltd.
6.875% 2/01/27 (c)		150,000		138,646
Transocean, Inc.
11.500% 1/30/27 (c)		36,000		30,878
				4,629,523
Oil & Gas Services — 0.1%
Halliburton Co.
2.920% 3/01/30		125,000		124,802
5.000% 11/15/45		10,000		11,115
Schlumberger Investment SA
2.650% 6/26/30		85,000		85,372
USA Compression Partners LP/USA Compression Finance Corp.
6.875% 9/01/27		185,000		190,550
				411,839
Packaging & Containers — 0.3%
CCL Industries, Inc.
3.050% 6/01/30 (c)		165,000		167,008
Packaging Corp. of America
3.400% 12/15/27		215,000		234,433
WRKCo, Inc.
3.750% 3/15/25		370,000		403,874
				805,315

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pharmaceuticals — 0.9%
AbbVie, Inc.
4.700% 5/14/45	$	260,000	$	308,445
Bausch Health Cos., Inc.
6.250% 2/15/29 (c)		170,000		180,413
Becton Dickinson and Co.
2.894% 6/06/22		520,000		533,465
Bristol-Myers Squibb Co.
4.350% 11/15/47		320,000		378,861
Cigna Corp.
3 mo. USD LIBOR + .890% 1.131% FRN 7/15/23		205,000		207,472
4.900% 12/15/48		230,000		280,924
CVS Health Corp.
5.050% 3/25/48		180,000		220,281
Endo Luxembourg Finance Co. I Sarl / Endo US, Inc.
6.125% 4/01/29 (c)		60,000		60,613
Merck & Co., Inc.
3.400% 3/07/29		385,000		422,698
Viatris, Inc.
1.650% 6/22/25 (c)		135,000		135,448
				2,728,620
Pipelines — 1.2%
Antero Midstream Partners LP / Antero Midstream Finance Corp.
5.750% 3/01/27 (c)		54,000		54,012
Cheniere Energy Partners LP
5.625% 10/01/26		95,000		99,341
Enable Midstream Partners LP
4.400% 3/15/27		120,000		129,644
Energy Transfer Operating LP
4.750% 1/15/26		370,000		410,662
EQM Midstream Partners LP
4.750% 1/15/31 (c)		140,000		135,800
Fermaca Enterprises S de RL de CV
6.375% 3/30/38 (c)		208,394		233,401
GNL Quintero SA
4.634% 7/31/29 (c)		250,000		274,562
Hess Midstream Operations LP
5.125% 6/15/28 (c)		110,000		111,210
Kinder Morgan Energy Partners LP
6.950% 1/15/38		300,000		401,728
NGL Energy Operating LLC / NGL Energy Finance Corp.
7.500% 2/01/26 (c)		135,000		138,519
NuStar Logistics LP
6.375% 10/01/30		90,000		97,200
ONEOK, Inc.
3.400% 9/01/29		90,000		92,235
Peru LNG SRL
5.375% 3/22/30 (c)		250,000		224,065
Rattler Midstream LP
5.625% 7/15/25 (c)		55,000		57,427
Sabine Pass Liquefaction LLC
5.000% 3/15/27		170,000		193,412
Sunoco Logistics Partners Operations LP
3.900% 7/15/26		750,000		807,022
Targa Resources Partners LP/Targa Resources Partners Finance Corp.
5.500% 3/01/30		100,000		105,000
Western Midstream Operating LP
4.350% STEP 2/01/25		75,000		77,625
				3,642,865
Real Estate — 0.0%
Realogy Group LLC / Realogy Co-Issuer Corp.
5.750% 1/15/29 (c)		70,000		69,037
7.625% 6/15/25 (c)		50,000		54,590
				123,627
Real Estate Investment Trusts (REITS) — 1.2%
Alexandria Real Estate Equities, Inc.
3.000% 5/18/51		130,000		117,960
American Tower Corp.
3.375% 10/15/26		472,000		509,773
3.600% 1/15/28		370,000		398,908
Boston Properties LP
3.400% 6/21/29		335,000		351,710
Corporate Office Properties LP
2.750% 4/15/31		50,000		48,311
Crown Castle International Corp.
3.650% 9/01/27		360,000		392,095
3.700% 6/15/26		700,000		764,739
4.000% 3/01/27		225,000		248,736
Equinix, Inc.
1.800% 7/15/27		130,000		127,467
Iron Mountain, Inc.
4.500% 2/15/31 (c)		60,000		59,316
National Retail Properties, Inc.
2.500% 4/15/30		115,000		112,685
Omega Healthcare Investors, Inc.
3.250% 4/15/33		50,000		48,001
Simon Property Group LP
2.450% 9/13/29		190,000		187,963
Uniti Group LP / Uniti Group Finance, Inc. / CSL Capital LLC
6.500% 2/15/29 (c)		70,000		69,580
VICI Properties LP / VICI Note Co., Inc.
3.750% 2/15/27 (c)		15,000		15,016
4.125% 8/15/30 (c)		60,000		60,522
Welltower, Inc.
2.800% 6/01/31		210,000		208,562
				3,721,344

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Retail — 0.6%
Asbury Automotive Group, Inc.
4.500% 3/01/28	$	16,000	$	16,367
4.750% 3/01/30		16,000		16,480
Beacon Roofing Supply, Inc.
4.875% 11/01/25 (c)		160,000		163,600
CK Hutchison International 20 Ltd.
2.500% 5/08/30 (c)		200,000		198,498
Dollar Tree, Inc.
4.000% 5/15/25		325,000		358,707
Ferrellgas Escrow LLC / FG Operating Finance Escrow Corp.
5.375% 4/01/26 (c)		55,000		54,631
Golden Nugget, Inc.
6.750% 10/15/24 (c)		175,000		176,750
The Home Depot, Inc.
3.900% 6/15/47		170,000		190,505
IRB Holding Corp.
6.750% 2/15/26 (c)		120,000		124,200
McDonald's Corp.
3.600% 7/01/30		205,000		223,451
4.450% 3/01/47		190,000		220,208
Staples, Inc.
7.500% 4/15/26 (c)		115,000		121,325
Superior Plus LP / Superior General Partner, Inc.
4.500% 3/15/29 (c)		120,000		121,224
				1,985,946
Semiconductors — 0.4%
Broadcom, Inc.
3.150% 11/15/25		69,000		73,513
3.419% 4/15/33 (c)		226,000		227,198
Marvell Technology Group Ltd.
4.200% 6/22/23		385,000		411,928
Micron Technology, Inc.
2.497% 4/24/23		190,000		196,867
NXP BV / NXP Funding LLC / NXP USA, Inc.
3.875% 6/18/26 (c)		190,000		208,696
Texas Instruments, Inc.
1.750% 5/04/30		105,000		100,118
				1,218,320
Software — 0.3%
Activision Blizzard, Inc.
1.350% 9/15/30		230,000		207,617
Oracle Corp.
3.850% 4/01/60		240,000		234,685
Roper Technologies, Inc.
1.750% 2/15/31		455,000		422,173
				864,475
Telecommunications — 0.9%
AT&T, Inc.
3.500% 9/15/53 (c)		679,000		624,474
Avaya, Inc.
6.125% 9/15/28 (c)		80,000		85,104
Bell Canada
0.750% 3/17/24		210,000		209,706
CenturyLink, Inc.
4.000% 2/15/27 (c)		85,000		86,822
5.125% 12/15/26 (c)		105,000		110,605
Digicel Group 0.5 Ltd.
7.000% (c) (d)		78,040		56,946
8.000% 4/01/25 (c)		52,337		43,178
Front Range BidCo, Inc.
4.000% 3/01/27 (c)		90,000		88,560
6.125% 3/01/28 (c)		50,000		51,422
Frontier Communications Corp.
5.000% 5/01/28 (c)		60,000		61,050
5.875% 10/15/27 (c)		30,000		31,800
6.750% 5/01/29 (c)		30,000		31,641
Gogo Intermediate Holdings LLC / Gogo Finance Co., Inc.
9.875% 5/01/24 (c)		75,000		78,937
GTT Communications, Inc.
7.875% 12/31/24 (c)		50,000		8,250
T-Mobile USA, Inc.
2.250% 2/15/26		135,000		135,971
2.550% 2/15/31 (c)		500,000		488,865
2.875% 2/15/31		30,000		28,995
3.375% 4/15/29		35,000		35,360
3.500% 4/15/25 (c)		130,000		140,323
Telesat Canada/telesat L
6.500% 10/15/27 (c)		40,000		40,069
Verizon Communications, Inc.
2.650% 11/20/40		25,000		22,794
4.400% 11/01/34		335,000		382,589
				2,843,461

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Transportation — 0.5%
CSX Corp.
3.800% 11/01/46	$	350,000	$	371,970
Empresa de Transporte de Pasajeros Metro SA
5.000% 1/25/47 (c)		750,000		874,875
FedEx Corp.
4.750% 11/15/45		160,000		186,842
				1,433,687
Trucking & Leasing — 0.1%
Penske Truck Leasing Co. LP/PTL Finance Corp.
4.200% 4/01/27 (c)		185,000		206,940
Water — 0.1%
Essential Utilities, Inc.
2.704% 4/15/30		220,000		221,516
TOTAL CORPORATE DEBT (Cost $74,114,912)				76,371,983
Municipal Obligations — 0.1%
Missouri Highway & Transportation Commission, Revenue Bonds,
5.063% 5/01/24		135,000		153,216
State of California BAB, General Obligation
7.550% 4/01/39		190,000		306,936
TOTAL MUNICIPAL OBLIGATIONS (Cost $428,519)				460,152
Non-U.S. Government Agency Obligations — 27.4%
Commercial Mortgage-Backed Securities — 8.2%
BANK
Series 2020-BN28, Class AS, 2.140% 3/15/63		380,000		366,189
Series 2018-BN10, Class C, 4.163% VRN 2/15/61 (f)		310,000		323,693
Series 2017-BNK5, Class C, 4.255% VRN 6/15/60 (f)		200,000		206,504
Benchmark Mortgage Trust
Series 2020-B19, Class AS, 2.148% 9/15/53		380,000		366,493
Series 2020-B18, Class C, 3.647% VRN 7/15/53 (f)		354,000		363,895
Series 2020-B18, Class AGNF, 4.139% 7/15/53 (c)		378,000		382,107
BFLD 2019-DPLO, Series 2019-DPLO, Class E, 1 mo. USD LIBOR + 2.240%
2.346% FRN 10/15/34 (c)		300,000		297,002
BX Trust, Series 2019-OC11, Class E,
4.076% VRN 12/09/41 (c) (f)		391,000		383,501
CFCRE Commercial Mortgage Trust, Series 2016-C3, Class XA,
0.991% VRN 1/10/48 (f)		5,540,316		231,232
CHT Mortgage Trust
Series 2017-CSMO, Class E, 1 mo. USD LIBOR + 3.000% 3.106% FRN 11/15/36 (c)		273,000		273,426
Series 2017-CSMO, Class F, 1 mo. USD LIBOR + 3.741% 3.847% FRN 11/15/36 (c)		320,000		318,203
Citigroup Commercial Mortgage Trust
Series 2016-GC36, Class D, 2.850% 2/10/49 (c)		201,000		144,238
Series 2019-GC41, Class B, 3.199% 8/10/56		377,000		386,254
Series 2020-420K, Class D, 3.312% VRN 11/10/42 (c) (f)		200,000		190,433
Series 2020-420K, Class E, 3.312% VRN 11/10/42 (c) (f)		200,000		181,392
Series 2015-GC31, Class C, 4.055% VRN 6/10/48 (f)		700,000		726,455
Series 2017-C4, Class B, 4.096% VRN 10/12/50 (f)		340,000		361,317
Commercial Mortgage Pass-Through Certificates
Series 2014-CR20, Class C, 4.514% VRN 11/10/47 (f)		411,000		429,749
Series 2015-LC23, Class C, 4.617% VRN 10/10/48 (f)		470,000		511,400
Series 2016-CR28, Class C, 4.641% VRN 2/10/49 (f)		465,000		503,549
CSAIL Commercial Mortgage Trust
Series 2015-C1, Class XA, 0.827% VRN 4/15/50 (f)		8,116,513		214,334
Series 2020-C19, Class C, 3.614% VRN 3/15/53 (f)		332,000		333,229
Series 2019-C16, Class B, 3.885% 6/15/52		334,000		367,170
Series 2016-C6, Class B, 3.924% VRN 1/15/49 (f)		298,000		322,491
Series 2015-C4, Class C, 4.563% VRN 11/15/48 (f)		427,000		464,031
Series 2018-C14, Class C, 4.891% VRN 11/15/51 (f)		405,000		436,171
Series 2016-C6, Class C, 4.953% VRN 1/15/49 (f)		378,000		397,884
DBGS Mortgage Trust, Series 2018-5BP, Class F, 1 mo. USD LIBOR + 2.450%
2.556% FRN 6/15/33 (c)		550,000		522,511
Fontainebleau Miami Beach Trust
Series 2019-FBLU, Class E, 3.963% VRN 12/10/36 (c) (f)		200,000		204,368
Series 2019-FBLU, Class G, 3.963% VRN 12/10/36 (c) (f)		236,000		234,318
Grace Trust, Series 2020-GRCE, Class D,
2.680% VRN 12/10/40 (c) (f)		125,000		120,991
GS Mortgage Securities Trust
Series 2015-GS1, Class XA, 0.762% VRN 11/10/48 (f)		7,824,374		249,812
Series 2018-RIVR, Class C, 1 mo. USD LIBOR + 1.250% 1.356% FRN 7/15/35 (c)		167,000		162,514
Series 2013-GC10, Class XA, 1.487% VRN 2/10/46 (f)		4,348,698		98,409
Series 2019-SOHO, Class E, 1 mo. USD LIBOR + 1.875% 1.981% FRN 6/15/36 (c)		318,000		304,827
Series 2014-GC26, Class D, 4.514% VRN 11/10/47 (c) (f)		1,117,000		760,888
Series 2016-GS2, Class C, 4.709% VRN 5/10/49 (f)		340,000		360,220

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
GSCG Trust, Series 2019-600C, Class E,
3.985% VRN 9/06/34 (c) (f)	$	497,000	$	486,977
HPLY Trust, Series 2019-HIT, Class F, 1 mo. USD LIBOR + 3.150%
3.256% FRN 11/15/36 (c)		409,208		391,825
JP Morgan Chase Commercial Mortgage Securities Trust
Series 2015-JP1, Class XA, 0.922% VRN 1/15/49 (f)		4,007,249		151,125
Series 2016-JP2, Class B, 3.460% 8/15/49		174,000		181,313
JPMBB Commercial Mortgage Securities Trust
Series 2015-C30, Class XA, 0.506% VRN 7/15/48 (f)		9,295,056		178,547
Series 2015-C29, Class XA, 0.653% VRN 5/15/48 (f)		7,720,486		181,871
Series 2014-C25, Class XA, 0.844% VRN 11/15/47 (f)		4,032,913		106,073
Series 2015-C28, Class XA, 0.969% VRN 10/15/48 (f)		6,668,518		203,493
Series 2015-C27, Class D, 3.854% VRN 2/15/48 (c) (f)		704,000		637,134
Series 2015-C28, Class B, 3.986% 10/15/48		340,000		365,227
Series 2015-C29, Class C, 4.198% VRN 5/15/48 (f)		162,000		162,522
Series 2015-C33, Class C, 4.612% VRN 12/15/48 (f)		527,000		565,024
Series 2015-C32, Class C, 4.652% VRN 11/15/48 (f)		87,000		71,266
JPMDB Commercial Mortgage Securities Trust, Series 2020-COR7, Class C,
3.726% VRN 5/13/53 (f)		327,000		336,162
MF1 Ltd., Series 2020-FL3, Class AS, 1 mo. USD LIBOR + 2.850%
2.956% FRN 7/15/35 (c)		318,000		323,135
Morgan Stanley Bank of America Merrill Lynch Trust
Series 2015-C27, Class D, 3.237% VRN 12/15/47 (c) (f)		504,000		459,518
Series 2015-C23, Class C, 4.145% VRN 7/15/50 (f)		650,000		675,608
Series 2015-C27, Class C, 4.516% VRN 12/15/47 (f)		351,000		359,459
Morgan Stanley Capital I Trust, Series 2015-UBS8, Class XA,
0.874% VRN 12/15/48 (f)		6,192,570		211,164
MSCG Trust, Series 2018-SELF, Class F, 1 mo. USD LIBOR + 3.050%
3.156% FRN 10/15/37 (c)		413,000		412,744
Natixis Commercial Mortgage Securities Trust, Series 2018-FL1, Class C, 1 mo. USD LIBOR + 2.200%
2.306% FRN 6/15/35 (c)		368,000		338,287
SG Commercial Mortgage Securities Trust
Series 2016-C5, Class XA, 1.952% VRN 10/10/48 (f)		3,793,616		255,069
Series 2016-C5, Class B, 3.933% 10/10/48		411,000		429,108
UBS Commercial Mortgage Trust
Series 2017-C2, Class B, 3.993% VRN 8/15/50 (f)		332,000		351,851
Series 2017-C1, Class B, 4.036% 6/15/50		328,000		347,799
Series 2017-C6, Class B, 4.154% VRN 12/15/50 (f)		340,000		376,303
Wells Fargo Commercial Mortgage Trust
Series 2015-NXS2, Class XA, 0.663% VRN 7/15/58 (f)		10,116,752		234,884
Series 2015-P2, Class XA, 0.926% VRN 12/15/48 (f)		4,379,017		165,364
Series 2019-C53, Class XA, 1.020% VRN 10/15/52 (f)		4,342,343		305,174
Series 2020-C57, Class XA, 2.100% VRN 8/15/53 (f)		2,229,839		342,821
Series 2016-C35, Class B, 3.438% 7/15/48		328,000		346,179
Series 2016-NXS6, Class B, 3.811% 11/15/49		248,000		267,329
Series 2014-LC16, Class D, 3.938% 8/15/50 (c)		169,000		38,997
Series 2015-C28, Class C, 4.094% VRN 5/15/48 (f)		248,000		254,266
Series 2019-C50, Class B, 4.192% 5/15/52		409,000		458,401
Series 2019-C50, Class C, 4.345% 5/15/52		409,000		424,109
Series 2016-LC24, Class C, 4.458% VRN 10/15/49 (f)		325,000		336,638
Series 2016-C37, Class C, 4.485% VRN 12/15/49 (f)		376,000		403,627
Series 2015-NXS4, Class C, 4.699% VRN 12/15/48 (f)		421,000		447,547
Series 2019-C49, Class C, 4.866% VRN 3/15/52 (f)		248,000		271,937
				25,357,077
Home Equity Asset-Backed Securities — 1.6%
GSAA Home Equity Trust, Series 2007-10, Class A2A
6.500% 11/25/37		3,703,131		2,399,522
Morgan Stanley ABS Capital I, Inc. Trust, Series 2006-HE6, Class A2C, 1 mo. USD LIBOR + .150%
0.259% FRN 9/25/36		5,664,419		2,497,700
				4,897,222
Other Asset-Backed Securities — 10.2%
AASET US Ltd., Series 2018-1A, Class A
3.844% 1/16/38 (c)		513,749		491,099
Blackbird Capital Aircraft Lease Securitization Ltd., Series 2016-1A, Class B,
5.682% STEP 12/16/41 (c)		752,144		743,151
BlueMountain CLO Ltd.
Series 2015-3A, Class CR, 3 mo. USD LIBOR + 2.600% 2.824% FRN 4/20/31 (c)		1,000,000		934,389
Series 2013-1A, Class CR, 3 mo. USD LIBOR + 4.150% 4.374% FRN 1/20/29 (c)		1,000,000		985,592
Catamaran CLO 2016-1 Ltd., Series 2016-1A, Class CR, 3 mo. USD LIBOR + 3.750%
3.940% FRN 1/18/29 (c)		500,000		492,686
CLI Funding VI LLC
Series 2020-3A, Class A, 2.070% 10/18/45 (c)		236,042		236,034
Series 2019-1A, Class A, 3.710% 5/18/44 (c)		408,344		409,230
Dividend Solar Loans LLC, Series 2018-1, Class B
4.290% 7/20/38 (c)		691,956		741,189
Dryden 40 Senior Loan Fund, Series 2015-40A, Class DR, 3 mo. USD LIBOR + 3.100%
3.294% FRN 8/15/31 (c)		500,000		500,279

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Gilbert Park CLO Ltd.
Series 2017-1A, Class D, 3 mo. USD LIBOR + 2.950% 3.191% FRN 10/15/30 (c)	$	500,000	$	498,588
Series 2017-1A, Class E, 3 mo. USD LIBOR + 6.400% 6.641% FRN 10/15/30 (c)		1,000,000		991,553
Grippen Park CLO Ltd., Series 2017-1A, Class D, 3 mo. USD LIBOR + 3.300%
3.524% FRN 1/20/30 (c)		1,000,000		1,000,193
Helios Issuer LLC
Series 2020-AA, Class A, 2.980% 6/20/47 (c)		447,296		451,593
Series 2017-1A, Class A, 4.940% 9/20/49 (c)		207,636		220,217
Hero Funding Trust, Series 2016-4A, Class A2
4.290% 9/20/47 (c)		180,308		187,768
Highbridge Loan Management Ltd., Series 13A-18, Class D, 3 mo. USD LIBOR + 3.000%
3.241% FRN 10/15/30 (c)		500,000		485,380
Invitation Homes Trust
Series 2018-SFR1, Class C, 1 mo. USD LIBOR + 1.250% 1.358% FRN 3/17/37 (c)		1,145,000		1,147,487
Series 2018-SFR1, Class D, 1 mo. USD LIBOR + 1.450% 1.558% FRN 3/17/37 (c)		749,727		750,887
ITE Rail Fund Levered LP, Series 2021-1A, Class A
2.250% 2/28/51 (c)		995,683		991,858
JOL Air Ltd., Series 2019-1, Class A
3.967% 4/15/44 (c)		434,262		436,889
Long Beach Mortgage Loan Trust, Series 2006-7, Class 1A, 1 mo. USD LIBOR + .155%
0.264% FRN 8/25/36		3,090,927		1,930,510
MACH 1 Cayman Ltd., Series 2019-1, Class A
3.474% 10/15/39 (c)		418,398		420,885
Madison Park Funding Ltd., Series 2014-14A, Class DRR, 3 mo. USD LIBOR + 2.950%
3.172% FRN 10/22/30 (c)		500,000		496,846
Merrill Lynch Mortgage Investors Trust, Series 2006-OPT1, Class A2C, 1 mo. USD LIBOR + .150%
0.259% FRN 8/25/37		1,751,583		1,697,015
Mosaic Solar Loans Trust
Series 2020-1A, Class A, 2.100% 4/20/46 (c)		414,864		413,175
Series 2020-2A, Class B, 2.210% 8/20/46 (c)		462,271		459,845
Series 2017-1A, Class A, 4.450% 6/20/42 (c)		346,051		377,147
Oak Hill Credit Partners Ltd., Series 2018-1A, Class D, 3 mo. USD LIBOR + 3.050%
3.274% FRN 10/20/30 (c)		500,000		498,423
Octagon Investment Partners 30 Ltd., Series 2017-1A, Class CR, 3 mo. USD LIBOR + 3.300%
3.524% FRN 3/17/30 (c)		1,000,000		1,000,003
Primose Funding LLC, Series 2019-1A, Class A2
4.475% 7/30/49 (c)		987,500		1,006,282
Sprite Ltd., Series 2017-1, Class A
4.250% 12/15/37 (c)		321,051		324,393
START Ireland, Series 2019-1, Class A
4.089% 3/15/44 (c)		308,478		309,674
Sunrun Atlas Issuer LLC, Series 2019-2, Class A
3.610% 2/01/55 (c)		726,297		766,263
Symphony CLO Ltd., Series 2015-16A, Class DR, 3 mo. USD LIBOR + 3.050%
3.291% FRN 10/15/31 (c)		500,000		500,031
Taco Bell Funding LLC, Series 2018-1A, Class A2I
4.318% 11/25/48 (c)		977,500		982,394
Textainer Marine Containers Ltd.
Series 2020-2A, Class A, 2.100% 9/20/45 (c)		476,606		477,636
Series 2019-1A, Class A, 3.960% 4/20/44 (c)		423,333		422,745
Thunderbolt Aircraft Lease Ltd.
Series 2018-A, Class A, 4.147% STEP 9/15/38 (c)		442,900		443,729
Series 2017-A, Class A, 4.212% STEP 5/17/32 (c)		855,185		867,649
TIF Funding II LLC, Series 2021-1A, Class A
1.650% 2/20/46 (c)		987,083		969,571
TPG Real Estate Finance Issuer Ltd., Series 2018-FL2, Class AS, 1 mo. USD LIBOR + 1.450%
1.558% FRN 11/15/37 (c)		314,000		313,998
Trip Rail Master Funding LLC, Series 2017-1A, Class A1
2.709% 8/15/47 (c)		59,189		59,227
Vantage Data Centers LLC, Series 2020-2A, Class A2
1.992% 9/15/45 (c)		375,000		368,313
VB-S1 Issuer LLC, Series 2020-1A, Class C2
3.031% 6/15/50 (c)		500,000		517,887
Westcott Park CLO Ltd., Series 2016-1A, Class DR, 3 mo. USD LIBOR + 3.250%
3.474% FRN 7/20/28 (c)		500,000		499,827
Willis Engine Structured Trust IV, Series 2018-A, Class A,
4.750% STEP 9/15/43 (c)		757,554		753,297
Wind River CLO Ltd.
Series 2017-1A, Class D, 3 mo. USD LIBOR + 3.750% 3.973% FRN 4/18/29 (c)		1,000,000		999,041
Series 2017-1A, Class DR, 3 mo. USD LIBOR + 3.720% 4.000% FRN 4/18/36 (c) (e)		1,000,000		989,895
				31,561,763
Student Loans Asset-Backed Securities — 0.4%
College Avenue Student Loans LLC, Series 2018-A, Class A1, 1 mo. USD LIBOR + 1.200%
1.309% FRN 12/26/47 (c)		325,239		327,183
SoFi Professional Loan Program LLC
Series 2017-D, Class BFX, 3.610% 9/25/40 (c)		350,000		353,693
Series 2018-B, Class BFX, 3.830% 8/25/47 (c)		500,000		511,945
				1,192,821

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Whole Loan Collateral Collateralized Mortgage Obligations — 6.6%
CIM Trust, Series 2017-6, Class A1,
3.015% VRN 6/25/57 (c) (f)	$	1,543,518	$	1,527,074
Citigroup Mortgage Loan Trust, Series 2007-AR5, Class 1A2A,
3.107% VRN 4/25/37 (f)		1,060,547		1,001,921
Countrywide Alternative Loan Trust
Series 2006-13T1, Class A11, 6.000% 5/25/36		1,869,097		1,249,185
Series 2006-36T2, Class 2A1, 6.250% 12/25/36		3,328,450		2,052,899
Countrywide Home Loans Mortgage Pass-Through Trust
Series 2007-HYB2, Class 3A1, 2.837% VRN 2/25/47 (f)		1,107,848		1,028,661
Series 2007-3, Class A21, 6.000% 4/25/37		1,703,607		1,271,532
Series 2007-14, Class A6, 6.000% 9/25/37		1,373,189		1,039,558
HarborView Mortgage Loan Trust, Series 2006-11, Class A1A, 1 mo. USD LIBOR + .340%
0.450% FRN 12/19/36		891,146		808,877
IndyMac INDX Mortgage Loan Trust, Series 2007-AR5, Class 2A1,
3.222% VRN 5/25/37 (f)		2,277,263		1,999,072
Lehman XS Trust, Series 2007-12N, Class 1A3A, 1 mo. USD LIBOR + .200%
0.309% FRN 7/25/47		2,532,548		2,500,243
Morgan Stanley Mortgage Loan Trust, Series 2005-3AR, Class 2A1,
3.014% VRN 7/25/35 (f)		367,622		350,750
Nomura Asset Acceptance Corp. Alternative Loan Trust, Series 2006-AR1, Class 2A1,
3.078% VRN 2/25/36 (f)		2,047,701		1,763,849
RBSSP Resecuritization Trust, Series 2009-5, Class 2A3,
6.500% VRN 10/26/37 (c) (f)		864,323		595,415
RFMSI Trust, Series 2007-S4, Class A5, 1 mo. USD LIBOR + .600%
6.000% FRN 4/25/37		228,644		214,564
Structured Adjustable Rate Mortgage Loan Trust, Series 2008-1, Class A2,
2.727% VRN 10/25/37 (f)		784,317		689,523
Voyager OPTONE Delaware Trust, Series 2009-1, Class SAC3,
3.285% VRN 2/25/38 (c) (f)		2,109,186		1,519,984
Washington Mutual Mortgage Pass-Through Certificates Trust, Series 2006-4, Class 3A5,
6.350% STEP 5/25/36		911,434		840,011
				20,453,118
Whole Loan Collateral Planned Amortization Classes — 0.4%
Countrywide Alternative Loan Trust, Series 2006-19CB, Class A15
6.000% 8/25/36		1,650,952		1,348,107
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $88,678,864)				84,810,108
Sovereign Debt Obligations — 2.4%
Abu Dhabi Government International Bond
3.125% 4/16/30 (c)		200,000		214,315
3.125% 9/30/49 (c)		400,000		380,952
Brazilian Government International Bond
5.625% 2/21/47		300,000		304,428
Chile Government International Bond
3.100% 1/22/61		700,000		648,067
Colombia Government International Bond
4.125% 5/15/51		250,000		237,500
5.000% 6/15/45		200,000		212,630
Dominican Republic International Bond
5.875% 1/30/60 (c)		300,000		286,950
Indonesia Government International Bond
3.375% 4/15/23 (c)		200,000		209,832
3.700% 10/30/49		250,000		253,891
Korea Electric Power Corp.
1.125% 6/15/25 (c)		200,000		198,499
Mexico Government International Bond
3.750% 1/11/28		535,000		571,728
3.771% 5/24/61		500,000		440,040
Panama Government International Bond
3.870% 7/23/60		200,000		197,232
4.300% 4/29/53		200,000		213,937
Perusahaan Penerbit SBSN Indonesia
3.800% 6/23/50 (c)		200,000		202,270
4.150% 3/29/27 (c)		200,000		220,530
Peruvian Government International Bond
2.780% 12/01/60		150,000		123,562
2.783% 1/23/31		200,000		199,802
3.300% 3/11/41		100,000		96,968
3.550% 3/10/51		300,000		291,336
Philippine Government International Bond
1.648% 6/10/31		400,000		377,784
3.700% 3/01/41		450,000		469,742
Qatar Government International Bond
3.375% 3/14/24 (c)		200,000		214,493
Saudi Government International Bond
2.900% 10/22/25 (c)		250,000		265,000
3.450% 2/02/61 (c)		200,000		183,698
3.750% 1/21/55 (c)		200,000		195,840
State of Israel
3.375% 1/15/50		200,000		202,000
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $7,399,706)				7,413,026

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
U.S. Government Agency Obligations and Instrumentalities — 15.1%
Collateralized Mortgage Obligations — 9.8%
Federal Home Loan Mortgage Corp. REMICS
Series 4934, Class P, 2.500% 11/15/40	$	2,134,712	$	2,233,173
Series 4093, Class PA, 3.000% 8/15/42		2,113,335		2,190,908
Series 4481, Class B, 3.000% 12/15/42		2,627,040		2,676,050
Series 4483, Class CA, 3.000% 6/15/44		3,227,935		3,376,277
Series 4750, Class PA, 3.000% 7/15/46		1,055,412		1,081,967
Federal Home Loan Mortgage Corp. STRIPS
Series 355, Class 300, 3.000% 8/15/47		2,253,176		2,382,747
Series 358, Class 300, 3.000% 10/15/47		1,905,061		2,009,414
Federal National Mortgage Association Series 2018-44, Class PZ  3.500% 6/25/48		2,870,636		3,126,071
Federal National Mortgage Association REMICS
Series 2018-21, Class PO, 0.000% 4/25/48		1,393,474		1,245,222
Series 2015-9, Class HA, 3.000% 1/25/45		530,542		559,551
Government National Mortgage Association
Series 2015-74, Class LZ, 3.500% 5/20/45		3,501,743		3,647,294
Series 2015-92, Class CZ, 3.500% 6/20/45		5,571,803		5,928,776
				30,457,450
Pass-Through Securities — 4.4%
Federal Home Loan Mortgage Corp.
Pool #BL5484 2.260% 1/01/30		3,000,000		3,110,522
Pool #G08520 2.500% 1/01/43		781,208		808,079
Pool #SB0048 3.000% 8/01/34		1,641,941		1,751,213
Pool #G08632 3.500% 3/01/45		1,227,323		1,321,038
Federal National Mortgage Association
Pool #MA4281 2.000% 3/01/51		3,990,291		3,980,972
Pool #MA2248 3.000% 4/01/45		681,376		712,074
Pool #AS7661 3.000% 8/01/46		555,336		578,446
Pool #AX2501 4.000% 10/01/44		1,114,832		1,224,653
				13,486,997
Whole Loans — 0.9%
Federal Home Loan Mortgage Corp. SCRT Series 2018-2, Class HV  3.000% VRN 11/25/57 (f)		2,734,195		2,888,596
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $44,403,905)				46,833,043
U.S. Treasury Obligations — 23.4%
U.S. Treasury Bonds & Notes — 23.4%
U.S. Treasury Bond
1.250% 5/15/50		10,880,000		8,186,039
1.875% 2/15/41		4,250,000		3,946,037
1.875% 2/15/51		3,960,000		3,500,695
2.750% 11/15/42		165,000		176,332
2.750% 11/15/47		2,070,000		2,206,464
4.750% 2/15/37		1,880,000		2,566,787
U.S. Treasury Note
0.125% 6/30/22		6,720,000		6,721,450
0.250% 11/15/23		340,000		339,801
0.250% 3/15/24		13,290,000		13,252,555
0.375% 11/30/25		430,000		420,408
0.500% 6/30/27		3,300,000		3,147,537
0.500% 10/31/27		480,000		454,378
0.750% 3/31/26		5,940,000		5,885,652
0.875% 11/15/30		420,000		388,102
1.125% 2/15/31		1,870,000		1,765,087
1.250% 3/31/28		6,280,000		6,210,900
1.625% 10/31/26		1,830,000		1,881,930
2.125% 9/30/24		2,410,000		2,545,297
2.250% 10/31/24		2,990,000		3,171,279
2.625% 1/31/26		500,000		540,995
2.750% 2/28/25		1,810,000		1,958,217
3.000% 9/30/25		2,930,000		3,215,540
				72,481,482
TOTAL U.S. TREASURY OBLIGATIONS (Cost $74,888,541)				72,481,482
TOTAL BONDS & NOTES (Cost $301,802,325)				300,266,366
TOTAL LONG-TERM INVESTMENTS (Cost $301,802,325)				300,266,366

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Short-Term Investments — 3.1%
Repurchase Agreement — 1.4%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/21, 0.000%, due 4/01/21 (g)	$	4,213,011	$	4,213,011
U.S. Treasury Bill — 1.7%
U.S. Treasury Bill
0.000% 5/06/21		5,150,000		5,149,912
TOTAL SHORT-TERM INVESTMENTS (Cost $9,362,873)				9,362,923
TOTAL INVESTMENTS — 99.9% (Cost $311,165,198) (h)				309,629,289
Less Unfunded Loan Commitments (0.00)%				(27,764	)
NET INVESTMENTS — 99.9% (Cost $311,137,434)				309,601,525
Other Assets/(Liabilities) — 0.1%				200,937
NET ASSETS — 100.0%			$	309,802,462

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 March 31, 2021 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 March 31, 2021, the aggregate market value of these securities amounted to $78,021,397 or 25.18% 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 March 31, 2021.
(g)	Maturity value of $4,213,011. Collateralized by U.S. Government Agency obligations with a rate of 1.750%, maturity date of 12/31/24, and an aggregate market value, including accrued interest, of $4,297,354.
(h)	See Note 3 for aggregate cost for federal tax purposes.

Currency Legend
USD	U.S. Dollar

MML Equity Fund —  Portfolio of Investments

March 31, 2021 (Unaudited)

	Number of Shares		Value
Equities — 99.0%
Common Stock — 98.9%
Basic Materials — 3.6%
Chemicals — 2.2%
Celanese Corp.		9,600	$	1,438,176
Eastman Chemical Co.		11,200		1,233,344
FMC Corp.		10,700		1,183,527
Huntsman Corp.		11,000		317,130
International Flavors & Fragrances, Inc.		9,484		1,324,061
Linde PLC		19,542		5,474,496
LyondellBasell Industries NV Class A		27,500		2,861,375
The Mosaic Co.		31,200		986,232
PPG Industries, Inc.		16,569		2,489,658
RPM International, Inc.		10,700		982,795
The Sherwin-Williams Co.		1,150		848,712
				19,139,506
Forest Products & Paper — 0.8%
International Paper Co.		127,305		6,883,381
Iron & Steel — 0.4%
Nucor Corp.		24,800		1,990,696
Reliance Steel & Aluminum Co.		5,200		791,908
Steel Dynamics, Inc.		17,300		878,148
				3,660,752
Mining — 0.2%
Freeport-McMoRan, Inc. (a)		24,400		803,492
Southern Copper Corp.		1,112		75,471
Teck Resources Ltd. Class B		26,000		498,680
				1,377,643
				31,061,282
Communications — 7.1%
Advertising — 0.2%
The Interpublic Group of Cos., Inc.		18,400		537,280
Omnicom Group, Inc.		17,700		1,312,455
				1,849,735
Internet — 2.7%
Alphabet, Inc. Class C (a)		7,971		16,489,049
CDW Corp.		11,800		1,955,850
eBay, Inc.		56,700		3,472,308
Facebook, Inc. Class A (a)		5,900		1,737,727
				23,654,934
Media — 2.5%
Charter Communications, Inc. Class A (a)		1,000		617,020
Comcast Corp. Class A		275,600		14,912,716
Discovery, Inc. Class A (a) (b)		10,300		447,638
Fox Corp. Class A		27,800		1,003,858
The Walt Disney Co. (a)		26,213		4,836,823
				21,818,055
Telecommunications — 1.7%
Cisco Systems, Inc.		232,800		12,038,088
Corning, Inc.		40,300		1,753,453
Juniper Networks, Inc.		18,900		478,737
				14,270,278
				61,593,002
Consumer, Cyclical — 11.6%
Airlines — 0.3%
Southwest Airlines Co.		39,361		2,403,383
Apparel — 0.1%
Hanesbrands, Inc.		13,300		261,611
Skechers U.S.A., Inc. Class A (a)		7,600		316,996
				578,607
Auto Manufacturers — 2.1%
Cummins, Inc.		12,200		3,161,142
Ford Motor Co. (a)		320,900		3,931,025
General Motors Co.		161,353		9,271,344
PACCAR, Inc.		22,300		2,072,116
				18,435,627
Auto Parts & Equipment — 0.1%
Lear Corp.		3,400		616,250
Distribution & Wholesale — 0.3%
LKQ Corp. (a)		25,000		1,058,250
W.W. Grainger, Inc.		3,200		1,282,976
				2,341,226
Entertainment — 0.1%
Live Nation Entertainment, Inc. (a) (b)		6,257		529,655
Vail Resorts, Inc.		600		174,996
				704,651
Home Builders — 0.7%
D.R. Horton, Inc.		30,000		2,673,600
Lennar Corp. Class A		22,700		2,297,921
PulteGroup, Inc.		22,100		1,158,924
Toll Brothers, Inc.		7,000		397,110
				6,527,555

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Home Furnishing — 0.2%
Tempur Sealy International, Inc.		6,800	$	248,608
Whirlpool Corp.		5,100		1,123,785
				1,372,393
Housewares — 0.1%
Newell Brands, Inc.		34,800		931,944
The Scotts Miracle-Gro Co.		1,200		293,964
				1,225,908
Leisure Time — 0.1%
Brunswick Corp.		6,400		610,368
Polaris, Inc.		2,500		333,750
				944,118
Lodging — 0.4%
Hilton Worldwide Holdings, Inc.		14,573		1,762,167
Hyatt Hotels Corp. Class A		3,200		264,640
Marriott International, Inc. Class A		7,337		1,086,683
				3,113,490
Retail — 7.0%
Advance Auto Parts, Inc.		5,500		1,009,195
AutoNation, Inc. (a)		7,200		671,184
AutoZone, Inc. (a)		2,000		2,808,600
Best Buy Co., Inc.		21,300		2,445,453
CarMax, Inc. (a)		6,300		835,758
Casey's General Stores, Inc.		3,000		648,570
Dollar Tree, Inc. (a)		19,300		2,209,078
Genuine Parts Co.		11,900		1,375,521
The Home Depot, Inc.		31,700		9,676,425
L Brands, Inc.		12,481		772,075
Lowe's Cos., Inc.		64,900		12,342,682
McDonald's Corp.		5,509		1,234,787
O'Reilly Automotive, Inc. (a)		5,900		2,992,775
Ross Stores, Inc.		7,290		874,144
Starbucks Corp.		18,200		1,988,714
Target Corp.		41,200		8,160,484
The TJX Cos., Inc.		28,964		1,915,968
Tractor Supply Co.		6,400		1,133,312
Walgreens Boots Alliance, Inc.		36,600		2,009,340
Walmart, Inc.		9,100		1,236,053
Williams-Sonoma, Inc.		4,400		788,480
Yum! Brands, Inc.		34,005		3,678,661
				60,807,259
Textiles — 0.1%
Mohawk Industries, Inc. (a)		5,800		1,115,398
				100,185,865
Consumer, Non-cyclical — 18.7%
Agriculture — 1.9%
Altria Group, Inc.		63,000		3,223,080
Archer-Daniels-Midland Co.		45,700		2,604,900
Bunge Ltd.		11,500		911,605
Darling Ingredients, Inc. (a)		24,032		1,768,275
Philip Morris International, Inc.		88,100		7,817,994
				16,325,854
Beverages — 0.0%
Molson Coors Beverage Co. Class B		6,800		347,820
Biotechnology — 1.3%
Alexion Pharmaceuticals, Inc. (a)		12,100		1,850,211
Amgen, Inc.		33,700		8,384,897
Bio-Rad Laboratories, Inc. Class A (a)		2,100		1,199,457
				11,434,565
Commercial Services — 0.8%
AMERCO		1,700		1,041,420
Quanta Services, Inc.		8,800		774,224
Service Corp. International		14,400		735,120
United Rentals, Inc. (a)		14,550		4,791,460
				7,342,224
Cosmetics & Personal Care — 1.1%
The Procter & Gamble Co.		68,200		9,236,326
Food — 0.8%
Conagra Brands, Inc.		31,400		1,180,640
The J.M. Smucker Co.		6,300		797,139
The Kraft Heinz Co.		78,400		3,136,000
Mondelez International, Inc. Class A		12,680		742,160
Tyson Foods, Inc. Class A		18,800		1,396,840
				7,252,779
Health Care – Products — 2.3%
Abbott Laboratories		13,100		1,569,904
Danaher Corp.		24,653		5,548,897
Hologic, Inc. (a)		21,200		1,576,856
Medtronic PLC		31,551		3,727,119
Stryker Corp.		9,791		2,384,892
Thermo Fisher Scientific, Inc.		10,494		4,789,252
				19,596,920

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Health Care – Services — 5.9%
Anthem, Inc.	29,664	$	10,647,893
Centene Corp. (a)	4,311		275,516
DaVita, Inc. (a)	9,200		991,484
HCA Healthcare, Inc.	49,853		9,389,314
Laboratory Corp. of America Holdings (a)	8,000		2,040,240
Molina Healthcare, Inc. (a)	4,900		1,145,424
Quest Diagnostics, Inc.	11,100		1,424,574
UnitedHealth Group, Inc.	65,612		24,412,257
Universal Health Services, Inc. Class B	6,400		853,696
			51,180,398
Household Products & Wares — 0.3%
Avery Dennison Corp.	11,978		2,199,760
Pharmaceuticals — 4.3%
AbbVie, Inc.	21,437		2,319,912
AmerisourceBergen Corp.	16,800		1,983,576
AstraZeneca PLC Sponsored ADR (b)	4,700		233,684
Bausch Health Cos., Inc. (a)	25,129		797,594
Cigna Corp.	19,900		4,810,626
Elanco Animal Health, Inc. (a)	48,428		1,426,205
Eli Lilly and Co.	11,006		2,056,141
Henry Schein, Inc. (a)	8,200		567,768
Jazz Pharmaceuticals PLC (a)	4,600		756,102
Johnson & Johnson	115,716		19,017,925
McKesson Corp.	13,200		2,574,528
Merck & Co., Inc.	7,100		547,339
			37,091,400
			162,008,046
Energy — 2.6%
Energy – Alternate Sources — 0.0%
First Solar, Inc. (a)	3,600		314,280
Oil & Gas — 2.1%
ConocoPhillips	6,800		360,196
Continental Resources, Inc.	30,000		776,100
Devon Energy Corp.	47,950		1,047,708
EOG Resources, Inc.	54,600		3,960,138
Exxon Mobil Corp.	143,300		8,000,439
Marathon Oil Corp.	26,700		285,156
Phillips 66	28,000		2,283,120
Valero Energy Corp.	26,100		1,868,760
			18,581,617
Pipelines — 0.5%
Cheniere Energy, Inc. (a)	20,800		1,497,808
The Williams Cos., Inc.	99,900		2,366,631
			3,864,439
			22,760,336
Financial — 27.5%
Banks — 15.4%
Bank of America Corp.	709,619		27,455,159
The Bank of New York Mellon Corp.	56,900		2,690,801
Citizens Financial Group, Inc.	49,787		2,198,096
Comerica, Inc.	8,800		631,312
Commerce Bancshares, Inc.	6,672		511,142
Cullen/Frost Bankers, Inc.	3,300		358,908
East West Bancorp, Inc.	9,000		664,200
Fifth Third Bancorp	45,600		1,707,720
The Goldman Sachs Group, Inc.	31,635		10,344,645
Huntington Bancshares, Inc.	56,200		883,464
JP Morgan Chase & Co.	210,800		32,090,084
KeyCorp	62,700		1,252,746
M&T Bank Corp.	7,900		1,197,719
Morgan Stanley	169,963		13,199,327
Northern Trust Corp.	13,300		1,397,963
The PNC Financial Services Group, Inc.	37,844		6,638,216
Regions Financial Corp.	61,600		1,272,656
State Street Corp.	22,700		1,907,027
SVB Financial Group (a)	3,300		1,629,078
Truist Financial Corp.	54,800		3,195,936
US Bancorp	92,973		5,142,337
Wells Fargo & Co.	411,551		16,079,297
Western Alliance Bancorp	6,200		585,528
Zions Bancorp NA	10,500		577,080
			133,610,441

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Diversified Financial Services — 3.6%
Ally Financial, Inc.		24,000	$	1,085,040
American Express Co.		600		84,864
Ameriprise Financial, Inc.		7,900		1,836,355
BlackRock, Inc.		8,800		6,634,848
Capital One Financial Corp.		29,300		3,727,839
The Charles Schwab Corp.		74,314		4,843,786
Discover Financial Services		11,700		1,111,383
LPL Financial Holdings, Inc.		5,100		725,016
Nasdaq, Inc.		10,500		1,548,330
OneMain Holdings, Inc.		4,600		247,112
Raymond James Financial, Inc.		8,700		1,066,272
SEI Investments Co.		9,200		560,556
Synchrony Financial		37,500		1,524,750
T. Rowe Price Group, Inc.		14,500		2,488,200
Visa, Inc. Class A		13,900		2,943,047
The Western Union Co.		33,800		833,508
				31,260,906
Insurance — 6.9%
Aflac, Inc.		45,000		2,303,100
Alleghany Corp. (a)		500		313,145
The Allstate Corp.		19,500		2,240,550
American Financial Group, Inc.		5,600		638,960
American International Group, Inc.		130,078		6,010,904
Arch Capital Group Ltd. (a)		25,000		959,250
Assurant, Inc.		3,800		538,726
Chubb Ltd.		45,508		7,188,899
Cincinnati Financial Corp.		5,400		556,686
Equitable Holdings, Inc.		167,996		5,480,030
Everest Re Group Ltd.		2,500		619,525
First American Financial Corp.		5,900		334,235
The Hartford Financial Services Group, Inc.		69,750		4,658,602
Lincoln National Corp.		12,400		772,148
Loews Corp.		22,310		1,144,057
Markel Corp. (a)		890		1,014,262
Marsh & McLennan Cos., Inc.		10,411		1,268,060
MetLife, Inc.		140,337		8,531,086
Old Republic International Corp.		12,200		266,448
Principal Financial Group, Inc.		22,769		1,365,229
The Progressive Corp.		37,600		3,594,936
Prudential Financial, Inc.		25,300		2,304,830
The Travelers Cos., Inc.		41,300		6,211,520
Voya Financial, Inc. (b)		8,500		540,940
W.R. Berkley Corp.		11,400		858,990
				59,715,118
Real Estate — 0.3%
CBRE Group, Inc. Class A (a)		27,600		2,183,436
Jones Lang LaSalle, Inc. (a)		4,200		751,968
				2,935,404
Real Estate Investment Trusts (REITS) — 1.3%
Equinix, Inc.		800		543,672
Prologis, Inc.		53,190		5,638,140
Welltower, Inc.		26,834		1,922,120
Weyerhaeuser Co.		84,834		3,020,090
				11,124,022
				238,645,891
Industrial — 13.2%
Aerospace & Defense — 0.5%
General Dynamics Corp.		23,600		4,284,816
Building Materials — 1.0%
Fortune Brands Home & Security, Inc.		11,500		1,101,930
Johnson Controls International PLC		83,858		5,003,807
Masco Corp.		21,600		1,293,840
Owens Corning		8,900		819,601
				8,219,178
Electrical Components & Equipment — 0.4%
Emerson Electric Co.		33,400		3,013,348
Schneider Electric SE		5,495		839,557
				3,852,905
Electronics — 1.5%
Agilent Technologies, Inc.		21,401		2,720,923
Allegion PLC		3,600		452,232
Arrow Electronics, Inc. (a)		6,200		687,084
Fortive Corp.		3,600		254,304
Honeywell International, Inc.		22,396		4,861,500
Hubbell, Inc.		14,335		2,679,068
Jabil, Inc.		12,400		646,784
Keysight Technologies, Inc. (a)		509		72,991
Sensata Technologies Holding PLC (a)		9,000		521,550
				12,896,436
Engineering & Construction — 0.4%
Jacobs Engineering Group, Inc.		26,656		3,445,821

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Environmental Controls — 0.1%
Pentair PLC		13,700	$	853,784
Hand & Machine Tools — 0.1%
Snap-on, Inc.		4,500		1,038,330
Machinery – Construction & Mining — 0.9%
BWX Technologies, Inc.		3,700		243,978
Caterpillar, Inc.		28,595		6,630,323
Oshkosh Corp.		4,000		474,640
				7,348,941
Machinery – Diversified — 1.0%
AGCO Corp.		6,100		876,265
Deere & Co.		13,214		4,943,886
Dover Corp.		11,900		1,631,847
Westinghouse Air Brake Technologies Corp.		15,600		1,234,896
				8,686,894
Miscellaneous - Manufacturing — 2.9%
3M Co.		47,460		9,144,593
Carlisle Cos., Inc.		4,400		724,152
General Electric Co.		871,482		11,442,558
ITT, Inc.		7,100		645,461
Parker-Hannifin Corp.		7,300		2,302,639
Textron, Inc.		18,800		1,054,304
				25,313,707
Packaging & Containers — 1.8%
Amcor PLC		129,100		1,507,888
Ball Corp.		8,339		706,647
Berry Global Group, Inc. (a)		7,300		448,220
Crown Holdings, Inc.		11,100		1,077,144
Packaging Corp. of America		37,326		5,019,601
Sealed Air Corp.		12,800		586,496
Sonoco Products Co.		5,500		348,150
WestRock Co.		114,709		5,970,603
				15,664,749
Transportation — 2.6%
CSX Corp.		48,600		4,686,012
Expeditors International of Washington, Inc.		3,800		409,222
FedEx Corp.		9,454		2,685,314
Knight-Swift Transportation Holdings, Inc.		14,000		673,260
Norfolk Southern Corp.		14,907		4,002,828
Union Pacific Corp.		5,820		1,282,786
United Parcel Service, Inc. Class B		53,084		9,023,749
				22,763,171
				114,368,732
Technology — 11.3%
Computers — 1.2%
Cognizant Technology Solutions Corp. Class A		44,000		3,437,280
Genpact Ltd.		15,500		663,710
Hewlett Packard Enterprise Co.		106,400		1,674,736
HP, Inc.		106,100		3,368,675
NetApp, Inc.		18,300		1,329,861
				10,474,262
Semiconductors — 6.6%
Analog Devices, Inc.		17,400		2,698,392
Applied Materials, Inc.		117,717		15,726,991
ASML Holding NV		4,691		2,896,036
Broadcom, Inc.		31,163		14,449,036
Intel Corp.		14,800		947,200
KLA Corp.		3,929		1,298,142
Microchip Technology, Inc.		5,000		776,100
Micron Technology, Inc. (a)		88,185		7,778,799
NXP Semiconductor NV		19,427		3,911,432
Qorvo, Inc. (a)		6,200		1,132,740
QUALCOMM, Inc.		30,113		3,992,683
Texas Instruments, Inc.		6,476		1,223,899
Xilinx, Inc.		1,300		161,070
				56,992,520

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Software — 3.5%
CDK Global, Inc.		6,700	$	362,202
Citrix Systems, Inc.		418		58,670
Fiserv, Inc. (a)		18,888		2,248,428
Microsoft Corp.		45,696		10,773,746
Oracle Corp.		242,000		16,981,140
salesforce.com, Inc. (a)		1,500		317,805
Synopsys, Inc. (a)		602		149,164
				30,891,155
				98,357,937
Utilities — 3.3%
Electric — 3.2%
AES Corp.		90,375		2,422,954
Ameren Corp.		11,350		923,436
Dominion Energy, Inc.		5,826		442,543
DTE Energy Co.		2,700		359,478
Evergy, Inc.		16,000		952,480
Exelon Corp.		80,300		3,512,322
FirstEnergy Corp.		6,400		222,016
NextEra Energy, Inc.		34,801		2,631,303
NRG Energy, Inc.		20,100		758,373
OGE Energy Corp.		10,900		352,724
Pinnacle West Capital Corp.		9,500		772,825
Public Service Enterprise Group, Inc.		80,265		4,832,756
Sempra Energy		37,697		4,997,868
The Southern Co.		65,551		4,074,650
WEC Energy Group, Inc.		4,852		454,099
Xcel Energy, Inc.		3,500		232,785
				27,942,612
Gas — 0.1%
UGI Corp.		17,200		705,372
				28,647,984
TOTAL COMMON STOCK (Cost $622,458,524)				857,629,075
Preferred Stock — 0.1%
Communications — 0.0%
Media — 0.0%
ViacomCBS, Inc. Convertible 5.750%		1,435		96,360
Utilities — 0.1%
Electric — 0.1%
The AES Corp. Convertible 6.875%		6,246		645,212
The Southern Co. Convertible 6.750%		7,930		403,875
				1,049,087
TOTAL PREFERRED STOCK (Cost $1,118,161)				1,145,447
TOTAL EQUITIES (Cost $623,576,685)				858,774,522
Mutual Funds — 1.0%
Diversified Financial Services — 1.0%
iShares Russell 1000 Value ETF		50,639		7,674,340
State Street Navigator Securities Lending Prime Portfolio (c)		533,546		533,546
TOTAL MUTUAL FUNDS (Cost $7,631,049)				8,207,886
TOTAL LONG-TERM INVESTMENTS (Cost $631,207,734)				866,982,408

MML Equity Fund —  Portfolio of Investments (Continued)

Short-Term Investments — 0.2%
	Number of Shares		Value
Mutual Fund — 0.0%
T. Rowe Price Government Reserve Investment Fund		318,297	$	318,297

	Principal Amount
Repurchase Agreement — 0.2%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/21, 0.000%, due 4/01/21 (d)	$	2,106,874	$	2,106,874
TOTAL SHORT-TERM INVESTMENTS (Cost $2,425,171)				2,425,171
TOTAL INVESTMENTS — 100.2% (Cost $633,632,905) (e)				869,407,579
Other Assets/(Liabilities) — (0.2)%				(1,834,412	)
NET ASSETS — 100.0%			$	867,573,167

Abbreviation Legend

ADR   American Depositary Receipt

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 March 31, 2021, was $1,668,617 or 0.19% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $1,174,332 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 $2,106,874. Collateralized by U.S. Government Agency obligations with a rate of 1.750%, maturity date of 12/31/24, and an aggregate market value, including accrued interest, of $2,149,149.
(e)	See Note 3 for aggregate cost for federal tax purposes.

MML Equity Momentum Fund —  Portfolio of Investments

March 31, 2021 (Unaudited)

	Number of Shares		Value
Equities — 100.0%
Common Stock — 100.0%
Basic Materials — 1.9%
Chemicals — 0.8%
Albemarle Corp.		639	$	93,364
DuPont de Nemours, Inc.		2,164		167,234
Eastman Chemical Co.		439		48,343
				308,941
Mining — 1.1%
Freeport-McMoRan, Inc. (a)		9,015		296,864
Newmont Corp.		2,343		141,213
				438,077
				747,018
Communications — 13.8%
Internet — 12.9%
Amazon.com, Inc. (a)		1,168		3,613,885
eBay, Inc.		3,816		233,692
Etsy, Inc. (a)		922		185,940
F5 Networks, Inc. (a)		300		62,586
Netflix, Inc. (a)		1,731		902,993
NortonLifeLock, Inc.		1,860		39,544
Twitter, Inc. (a)		2,652		168,747
				5,207,387
Media — 0.1%
News Corp. Class A		1,319		33,542
Telecommunications — 0.8%
T-Mobile US, Inc. (a)		2,773		347,429
				5,588,358
Consumer, Cyclical — 17.1%
Apparel — 1.5%
NIKE, Inc. Class B		4,470		594,018
Auto Manufacturers — 10.0%
Cummins, Inc.		594		153,911
General Motors Co.		4,099		235,529
PACCAR, Inc.		966		89,761
Tesla, Inc. (a)		5,350		3,573,425
				4,052,626
Auto Parts & Equipment — 0.3%
Aptiv PLC		837		115,422
Distribution & Wholesale — 0.4%
Fastenal Co.		1,890		95,029
Pool Corp.		179		61,798
				156,827
Retail — 4.9%
Chipotle Mexican Grill, Inc. (a)		133		188,969
Costco Wholesale Corp.		1,206		425,091
Dollar General Corp.		812		164,528
Domino's Pizza, Inc.		117		43,031
L Brands, Inc.		722		44,663
Lowe's Cos., Inc.		2,471		469,935
Target Corp.		2,862		566,876
Tractor Supply Co.		533		94,384
				1,997,477
				6,916,370
Consumer, Non-cyclical — 19.6%
Beverages — 0.3%
Monster Beverage Corp. (a)		1,174		106,940
Biotechnology — 1.2%
Bio-Rad Laboratories, Inc. Class A (a)		102		58,260
Illumina, Inc. (a)		538		206,624
Regeneron Pharmaceuticals, Inc. (a)		420		198,719
				463,603
Commercial Services — 5.1%
MarketAxess Holdings, Inc.		151		75,186
PayPal Holdings, Inc. (a)		7,358		1,786,817
Quanta Services, Inc.		730		64,225
Rollins, Inc.		874		30,083
United Rentals, Inc. (a)		291		95,829
				2,052,140
Food — 0.2%
The Kroger Co.		2,573		92,602
Health Care – Products — 8.8%
Abbott Laboratories		6,958		833,847
ABIOMED, Inc. (a)		283		90,200
Align Technology, Inc. (a)		349		188,994
Danaher Corp.		3,003		675,915
Hologic, Inc. (a)		957		71,182
IDEXX Laboratories, Inc. (a)		502		245,634
Intuitive Surgical, Inc. (a)		341		251,978
PerkinElmer, Inc.		572		73,382
Thermo Fisher Scientific, Inc.		2,150		981,217
West Pharmaceutical Services, Inc.		532		149,907
				3,562,256
Health Care – Services — 0.3%
Catalent, Inc. (a)		924		97,306
DaVita, Inc. (a)		288		31,038
				128,344

MML Equity Momentum Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Household Products & Wares — 0.2%
The Clorox Co.		482	$	92,968
Pharmaceuticals — 3.5%
AbbVie, Inc.		6,131		663,497
DexCom, Inc. (a)		347		124,708
Eli Lilly and Co.		3,228		603,055
				1,391,260
				7,890,113
Energy — 0.4%
Energy – Alternate Sources — 0.4%
Enphase Energy, Inc. (a)		943		152,917
Financial — 0.7%
Banks — 0.3%
SVB Financial Group (a)		224		110,580
Real Estate Investment Trusts (REITS) — 0.4%
Equinix, Inc.		245		166,500
				277,080
Industrial — 7.8%
Building Materials — 0.6%
Carrier Global Corp.		5,973		252,180
Electronics — 1.2%
Agilent Technologies, Inc.		1,329		168,969
Keysight Technologies, Inc. (a)		771		110,561
Mettler-Toledo International, Inc. (a)		105		121,348
Trimble, Inc. (a)		914		71,100
				471,978
Machinery – Construction & Mining — 1.1%
Caterpillar, Inc.		1,918		444,727
Machinery – Diversified — 2.2%
Deere & Co.		1,848		691,411
Otis Worldwide Corp.		1,433		98,089
Rockwell Automation, Inc.		312		82,817
				872,317
Miscellaneous - Manufacturing — 0.3%
Trane Technologies PLC		809		133,938
Packaging & Containers — 0.1%
Packaging Corp. of America		342		45,992
Transportation — 2.3%
FedEx Corp.		1,043		296,254
Old Dominion Freight Line, Inc.		386		92,798
United Parcel Service, Inc. Class B		3,243		551,277
				940,329
				3,161,461
Technology — 38.7%
Computers — 9.0%
Apple, Inc.		29,803		3,640,436
Office & Business Equipment — 0.3%
Zebra Technologies Corp. Class A (a)		231		112,076
Semiconductors — 16.0%
Advanced Micro Devices, Inc. (a)		5,522		433,477
Applied Materials, Inc.		3,693		493,385
Broadcom, Inc.		1,554		720,528
IPG Photonics Corp. (a)		170		35,860
KLA Corp.		637		210,465
Lam Research Corp.		522		310,715
Micron Technology, Inc. (a)		3,539		312,175
Monolithic Power Systems, Inc.		239		84,417
NVIDIA Corp.		3,998		2,134,652
Qorvo, Inc. (a)		434		79,292
QUALCOMM, Inc.		6,139		813,970
Skyworks Solutions, Inc.		562		103,116
Teradyne, Inc.		761		92,598
Texas Instruments, Inc.		3,222		608,926
				6,433,576
Software — 13.4%
Activision Blizzard, Inc.		3,737		347,541
Autodesk, Inc. (a)		680		188,462
Cadence Design Systems, Inc. (a)		1,555		213,019
Electronic Arts, Inc.		962		130,226
Microsoft Corp.		15,552		3,666,695
MSCI, Inc.		245		102,724
ServiceNow, Inc. (a)		817		408,590
Synopsys, Inc. (a)		837		207,392
Take-Two Interactive Software, Inc. (a)		552		97,538
Tyler Technologies, Inc. (a)		133		56,463
				5,418,650
				15,604,738
TOTAL COMMON STOCK (Cost $38,763,600)				40,338,055
TOTAL EQUITIES (Cost $38,763,600)				40,338,055
TOTAL LONG-TERM INVESTMENTS (Cost $38,763,600)				40,338,055
TOTAL INVESTMENTS — 100.0% (Cost $38,763,600) (b)				40,338,055
Other Assets/(Liabilities) — 0.0%				9,128
NET ASSETS — 100.0%			$	40,347,183

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Non-income producing security.
(b)	See Note 3 for aggregate cost for federal tax purposes.

MML Equity Rotation Fund —  Portfolio of Investments

March 31, 2021 (Unaudited)

	Number of Shares		Value
Equities — 99.9%
Common Stock — 99.9%
Basic Materials — 5.2%
Chemicals — 3.3%
Air Products & Chemicals, Inc.		188	$	52,892
Albemarle Corp.		1,368		199,878
Axalta Coating Systems Ltd. (a)		688		20,351
Celanese Corp.		607		90,935
The Chemours Co.		3,904		108,961
Dow, Inc.		1,365		87,278
DuPont de Nemours, Inc.		390		30,139
Eastman Chemical Co.		1,790		197,115
Ecolab, Inc.		149		31,896
Element Solutions, Inc.		1,359		24,856
FMC Corp.		528		58,402
Huntsman Corp.		2,232		64,349
International Flavors & Fragrances, Inc.		209		29,179
Linde PLC		116		32,496
LyondellBasell Industries NV Class A		469		48,799
The Mosaic Co.		464		14,667
Olin Corp.		3,410		129,478
PPG Industries, Inc.		421		63,259
RPM International, Inc.		874		80,277
The Sherwin-Williams Co.		72		53,137
Valvoline, Inc.		1,717		44,762
Westlake Chemical Corp.		282		25,039
				1,488,145
Forest Products & Paper — 0.4%
International Paper Co.		3,104		167,833
Iron & Steel — 0.6%
Nucor Corp.		1,216		97,608
Reliance Steel & Aluminum Co.		515		78,430
Steel Dynamics, Inc.		2,079		105,530
				281,568
Mining — 0.9%
Freeport-McMoRan, Inc. (a)		6,164		202,981
Newmont Corp.		3,088		186,114
Royal Gold, Inc.		116		12,484
Southern Copper Corp.		190		12,895
				414,474
				2,352,020
Communications — 7.3%
Advertising — 0.3%
The Interpublic Group of Cos., Inc.		2,509		73,263
Omnicom Group, Inc.		229		16,980
The Trade Desk, Inc. Class A (a)		88		57,346
				147,589
Internet — 4.5%
Alphabet, Inc. Class A (a)		5		10,313
Alphabet, Inc. Class C (a)		5		10,343
Amazon.com, Inc. (a)		9		27,847
Anaplan, Inc. (a)		253		13,624
Booking Holdings, Inc. (a)		12		27,958
CDW Corp.		273		45,250
eBay, Inc.		3,378		206,869
Etsy, Inc. (a)		541		109,103
Expedia Group, Inc.		758		130,467
F5 Networks, Inc. (a)		368		76,772
Facebook, Inc. Class A (a)		35		10,309
GoDaddy, Inc. Class A (a)		475		36,869
GrubHub, Inc. (a)		786		47,160
IAC/InterActiveCorp (a)		1,602		346,529
Match Group, Inc. (a)		456		62,645
Netflix, Inc. (a)		33		17,215
NortonLifeLock, Inc.		7,015		149,139
Okta, Inc. (a)		297		65,468
Palo Alto Networks, Inc. (a)		179		57,649
Pinterest, Inc. Class A (a)		655		48,490
Roku, Inc. (a)		264		86,003
Spotify Technology SA (a)		190		50,910
Twitter, Inc. (a)		2,321		147,685
VeriSign, Inc. (a)		126		25,044
Wayfair, Inc. Class A (a) (b)		268		84,353
Zendesk, Inc. (a)		478		63,392
Zillow Group, Inc. Class A  (a)		341		44,801
Zillow Group, Inc. Class C Class C  (a)		493		63,912
				2,066,119

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Media — 1.5%
Altice USA, Inc. Class A (a)	2,379	$	77,389
Cable One, Inc.	30		54,851
Charter Communications, Inc. Class A (a)	77		47,511
Comcast Corp. Class A	545		29,490
Discovery, Inc. Class C (a)	334		12,321
DISH Network Corp. Class A (a)	988		35,766
FactSet Research Systems, Inc.	177		54,620
Fox Corp. Class A	347		12,530
Liberty Broadband Corp. Class C (a)	1,302		195,495
Liberty Media Corp-Liberty SiriusXM Class C (a)	340		14,997
The New York Times Co. Class A	1,078		54,568
News Corp. Class A	1,436		36,518
Nexstar Media Group, Inc. Class A	153		21,486
ViacomCBS, Inc. Class B	772		34,817
			682,359
Telecommunications — 1.0%
Arista Networks, Inc. (a)	294		88,756
Ciena Corp. (a)	592		32,394
Corning, Inc.	3,579		155,722
Juniper Networks, Inc.	877		22,214
Lumen Technologies, Inc.	1,897		25,325
Motorola Solutions, Inc.	260		48,893
T-Mobile US, Inc. (a)	202		25,309
Ubiquiti, Inc.	41		12,230
Verizon Communications, Inc.	264		15,352
			426,195
			3,322,262
Consumer, Cyclical — 16.7%
Airlines — 0.1%
JetBlue Airways Corp. (a)	556		11,309
Southwest Airlines Co.	575		35,110
			46,419
Apparel — 0.3%
Capri Holdings Ltd. (a)	471		24,021
Hanesbrands, Inc.	2,925		57,535
NIKE, Inc. Class B	183		24,319
Tapestry, Inc.	566		23,325
VF Corp.	130		10,389
			139,589
Auto Manufacturers — 1.4%
Cummins, Inc.	872		225,944
Ford Motor Co. (a)	6,909		84,635
General Motors Co.	3,325		191,055
PACCAR, Inc.	1,388		128,973
			630,607
Auto Parts & Equipment — 0.6%
Allison Transmission Holdings, Inc.	314		12,821
Aptiv PLC	737		101,632
BorgWarner, Inc.	635		29,439
Gentex Corp.	1,375		49,046
Lear Corp.	453		82,106
			275,044
Distribution & Wholesale — 1.2%
Copart, Inc. (a)	520		56,477
Fastenal Co.	1,778		89,398
IAA, Inc. (a)	988		54,479
LKQ Corp. (a)	1,452		61,463
Pool Corp.	322		111,167
W.W. Grainger, Inc.	211		84,596
Watsco, Inc.	388		101,171
			558,751
Entertainment — 0.2%
Live Nation Entertainment, Inc. (a)	210		17,776
Madison Square Garden Entertainment Corp. (a)	117		9,571
Vail Resorts, Inc.	120		34,999
			62,346
Home Builders — 2.4%
D.R. Horton, Inc.	3,270		291,422
Lennar Corp. Class A	2,967		300,349
Lennar Corp. Class B	201		16,550
NVR, Inc. (a)	15		70,664
PulteGroup, Inc.	2,447		128,321
Thor Industries, Inc. (b)	1,271		171,255
Toll Brothers, Inc.	2,177		123,501
			1,102,062

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Home Furnishing — 1.0%
Dolby Laboratories, Inc. Class A		536	$	52,914
Leggett & Platt, Inc.		411		18,762
Tempur Sealy International, Inc.		1,790		65,442
Whirlpool Corp.		1,460		321,711
				458,829
Housewares — 0.6%
Newell Brands, Inc.		2,951		79,028
The Scotts Miracle-Gro Co.		755		184,952
				263,980
Leisure Time — 0.5%
Brunswick Corp.		706		67,331
Harley-Davidson, Inc.		1,174		47,077
Peloton Interactive, Inc. Class A (a)		777		87,366
Polaris, Inc.		311		41,519
				243,293
Lodging — 0.2%
Choice Hotels International, Inc.		91		9,763
Extended Stay America, Inc.		643		12,699
Hilton Worldwide Holdings, Inc.		157		18,984
MGM Resorts International		650		24,694
Travel + Leisure Co.		334		20,428
				86,568
Retail — 8.0%
Advance Auto Parts, Inc.		203		37,248
AutoNation, Inc. (a)		1,226		114,288
AutoZone, Inc. (a)		29		40,725
Best Buy Co., Inc.		2,674		307,002
Burlington Stores, Inc. (a)		193		57,668
CarMax, Inc. (a)		648		85,964
Carvana Co. (a) (b)		226		59,302
Casey's General Stores, Inc.		447		96,637
Chipotle Mexican Grill, Inc. (a)		76		107,982
Costco Wholesale Corp.		164		57,807
Darden Restaurants, Inc.		250		35,500
Dick's Sporting Goods, Inc. (b)		1,476		112,397
Dollar General Corp.		551		111,644
Dollar Tree, Inc. (a)		528		60,435
Domino's Pizza, Inc.		235		86,431
Five Below, Inc. (a)		301		57,428
Floor & Decor Holdings, Inc. Class A (a)		1,045		99,777
Foot Locker, Inc.		1,182		66,487
The Gap, Inc. (a)		4,365		129,990
Genuine Parts Co.		434		50,166
The Home Depot, Inc.		62		18,926
L Brands, Inc.		5,485		339,302
Lowe's Cos., Inc.		424		80,636
Lululemon Athletica, Inc. (a)		197		60,422
McDonald's Corp.		88		19,724
MSC Industrial Direct Co., Inc. Class A		626		56,459
Nu Skin Enterprises, Inc. Class A		1,207		63,838
O'Reilly Automotive, Inc. (a)		88		44,638
Ollie's Bargain Outlet Holdings, Inc. (a)		486		42,282
Penske Automotive Group, Inc.		540		43,330
Qurate Retail, Inc.		9,102		107,040
Ross Stores, Inc.		267		32,016
Starbucks Corp.		185		20,215
Target Corp.		794		157,268
The TJX Cos., Inc.		542		35,853
Tractor Supply Co.		1,179		208,777
Ulta Beauty, Inc. (a)		238		73,582
Walmart, Inc.		56		7,606
The Wendy's Co.		749		15,175
Williams-Sonoma, Inc.		1,749		313,421
Yum China Holdings, Inc.		1,650		97,696
Yum! Brands, Inc.		387		41,866
				3,654,950
Textiles — 0.1%
Mohawk Industries, Inc. (a)		270		51,924
Toys, Games & Hobbies — 0.1%
Hasbro, Inc.		215		20,666
Mattel, Inc. (a)		1,685		33,565
				54,231
				7,628,593

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Consumer, Non-cyclical — 21.7%
Agriculture — 0.3%
Archer-Daniels-Midland Co.	1,694	$	96,558
Bunge Ltd.	280		22,195
Philip Morris International, Inc.	231		20,499
			139,252
Beverages — 0.6%
The Boston Beer Co., Inc. Class A (a)	81		97,709
Brown-Forman Corp. Class B	234		16,139
Constellation Brands, Inc. Class A	170		38,760
Keurig Dr Pepper, Inc.	425		14,607
Molson Coors Beverage Co. Class B	333		17,033
Monster Beverage Corp. (a)	566		51,557
PepsiCo, Inc.	98		13,862
			249,667
Biotechnology — 1.9%
ACADIA Pharmaceuticals, Inc. (a)	168		4,334
Acceleron Pharma, Inc. (a)	268		36,343
Alexion Pharmaceuticals, Inc. (a)	683		104,438
Amgen, Inc.	63		15,675
Bio-Rad Laboratories, Inc. Class A (a)	338		193,055
Biogen, Inc. (a)	98		27,416
Corteva, Inc.	1,925		89,743
Exact Sciences Corp. (a)	200		26,356
Exelixis, Inc. (a)	1,462		33,027
Gilead Sciences, Inc.	436		28,179
Guardant Health, Inc. (a)	255		38,926
Illumina, Inc. (a)	33		12,674
Incyte Corp. (a)	134		10,890
Iovance Biotherapeutics, Inc. (a)	226		7,155
Moderna, Inc. (a)	255		33,392
Regeneron Pharmaceuticals, Inc. (a)	185		87,531
Royalty Pharma PLC Class A (b)	680		29,662
Seagen, Inc. (a)	223		30,966
United Therapeutics Corp. (a)	215		35,963
Vertex Pharmaceuticals, Inc. (a)	64		13,753
			859,478
Commercial Services — 4.5%
ADT, Inc. (b)	1,080		9,115
AMERCO	68		41,657
Automatic Data Processing, Inc.	129		24,313
Avalara, Inc. (a)	420		56,041
Booz Allen Hamilton Holding Corp.	1,126		90,677
Bright Horizons Family Solutions, Inc. (a)	177		30,347
Chegg, Inc. (a)	834		71,440
Cintas Corp.	211		72,016
CoreLogic, Inc.	1,313		104,055
CoStar Group, Inc. (a)	80		65,751
Equifax, Inc.	220		39,849
FleetCor Technologies, Inc. (a)	49		13,163
FTI Consulting, Inc. (a)	128		17,934
Gartner, Inc. (a)	162		29,573
Global Payments, Inc.	91		18,344
Grand Canyon Education, Inc. (a)	110		11,781
IHS Markit Ltd.	485		46,938
ManpowerGroup, Inc.	300		29,670
MarketAxess Holdings, Inc.	130		64,729
Moody's Corp.	129		38,521
Morningstar, Inc.	158		35,556
Paylocity Holding Corp. (a)	236		42,440
PayPal Holdings, Inc. (a)	102		24,770
Quanta Services, Inc.	3,270		287,694
Robert Half International, Inc.	602		46,998
Rollins, Inc.	1,254		43,163
S&P Global, Inc.	127		44,814
Service Corp. International	932		47,579
Square, Inc. Class A (a)	272		61,757
StoneCo Ltd. Class A (a)	785		48,058
Terminix Global Holdings, Inc. (a)	1,244		59,301
TransUnion	436		39,240
United Rentals, Inc. (a)	1,045		344,129
Verisk Analytics, Inc.	369		65,199
			2,066,612
Cosmetics & Personal Care — 0.3%
Colgate-Palmolive Co.	760		59,911
The Estee Lauder Cos., Inc. Class A	192		55,843
			115,754

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Food — 2.3%
Albertsons Cos., Inc. Class A (b)		622	$	11,861
Beyond Meat, Inc. (a) (b)		324		42,159
Campbell Soup Co.		714		35,893
Conagra Brands, Inc.		1,954		73,470
Flowers Foods, Inc.		1,420		33,796
General Mills, Inc.		2,119		129,937
Grocery Outlet Holding Corp. (a)		621		22,909
The Hain Celestial Group, Inc. (a)		1,263		55,067
The Hershey Co.		273		43,178
Hormel Foods Corp.		751		35,883
Ingredion, Inc.		252		22,660
The J.M. Smucker Co.		884		111,852
Kellogg Co.		448		28,358
The Kraft Heinz Co.		1,063		42,520
The Kroger Co.		5,537		199,277
Lamb Weston Holdings, Inc.		125		9,685
McCormick & Co., Inc.		495		44,134
Mondelez International, Inc. Class A		586		34,299
Post Holdings, Inc. (a)		106		11,206
Sprouts Farmers Market, Inc. (a)		1,411		37,561
Sysco Corp.		282		22,205
US Foods Holding Corp. (a)		263		10,025
				1,057,935
Health Care – Products — 4.3%
10X Genomics, Inc. Class A (a)		316		57,196
Abbott Laboratories		217		26,005
ABIOMED, Inc. (a)		348		110,918
Adaptive Biotechnologies Corp. (a)		459		18,479
Align Technology, Inc. (a)		199		107,765
Avantor, Inc. (a)		2,423		70,097
Baxter International, Inc.		273		23,025
Bio-Techne Corp.		213		81,351
Bruker Corp.		233		14,977
The Cooper Cos., Inc.		83		31,880
Danaher Corp.		154		34,662
Dentsply Sirona, Inc.		253		16,144
Edwards Lifesciences Corp. (a)		305		25,510
Envista Holdings Corp. (a)		1,007		41,086
Globus Medical, Inc. Class A (a)		171		10,546
Haemonetics Corp. (a)		102		11,323
Hill-Rom Holdings, Inc.		120		13,258
Hologic, Inc. (a)		1,934		143,851
ICU Medical, Inc. (a)		62		12,737
IDEXX Laboratories, Inc. (a)		206		100,798
Insulet Corp. (a)		260		67,839
Intuitive Surgical, Inc. (a)		47		34,730
Masimo Corp. (a)		299		68,668
Medtronic PLC		98		11,577
Novocure Ltd. (a)		447		59,084
Penumbra, Inc. (a)		241		65,210
PerkinElmer, Inc.		579		74,280
QIAGEN NV (a)		596		29,019
Quidel Corp. (a)		352		45,031
Repligen Corp. (a)		366		71,154
ResMed, Inc.		390		75,668
Steris PLC		436		83,049
Stryker Corp.		110		26,794
Tandem Diabetes Care, Inc. (a)		416		36,712
Teleflex, Inc.		58		24,097
Thermo Fisher Scientific, Inc.		63		28,752
Varian Medical Systems, Inc. (a)		336		59,314
West Pharmaceutical Services, Inc.		406		114,403
Zimmer Biomet Holdings, Inc.		197		31,536
				1,958,525
Health Care – Services — 4.2%
Acadia Healthcare Co., Inc. (a)		1,867		106,680
Amedisys, Inc. (a)		322		85,262
Anthem, Inc.		191		68,559
Catalent, Inc. (a)		1,301		137,008
Centene Corp. (a)		1,378		88,068
Charles River Laboratories International, Inc. (a)		494		143,176
Chemed Corp.		78		35,866
DaVita, Inc. (a)		1,824		196,573
Encompass Health Corp.		914		74,857
HCA Healthcare, Inc.		372		70,062
Humana, Inc.		274		114,875
IQVIA Holdings, Inc. (a)		241		46,547
Laboratory Corp. of America Holdings (a)		611		155,823
Molina Healthcare, Inc. (a)		1,406		328,667
PPD, Inc. (a)		444		16,801
Quest Diagnostics, Inc.		879		112,811
Syneos Health, Inc. (a)		490		37,167
Teladoc Health, Inc. (a) (b)		288		52,344
UnitedHealth Group, Inc.		49		18,231
Universal Health Services, Inc. Class B		261		34,815
				1,924,192

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Household Products & Wares — 0.8%
Avery Dennison Corp.		452	$	83,010
Church & Dwight Co., Inc.		870		75,994
The Clorox Co.		674		130,001
Kimberly-Clark Corp.		319		44,357
Reynolds Consumer Products, Inc.		320		9,530
Spectrum Brands Holdings, Inc.		498		42,330
				385,222
Pharmaceuticals — 2.5%
AbbVie, Inc.		271		29,328
AmerisourceBergen Corp.		861		101,658
Becton Dickinson and Co.		34		8,267
Bristol-Myers Squibb Co.		202		12,752
Cardinal Health, Inc.		1,192		72,414
Cigna Corp.		308		74,456
CVS Health Corp.		538		40,474
DexCom, Inc. (a)		211		75,831
Elanco Animal Health, Inc. (a)		606		17,847
Eli Lilly and Co.		163		30,452
Henry Schein, Inc. (a)		647		44,798
Herbalife Nutrition Ltd. (a)		529		23,466
Horizon Therapeutics PLC (a)		1,862		171,378
Jazz Pharmaceuticals PLC (a)		180		29,587
McKesson Corp.		1,422		277,347
Perrigo Co. PLC		297		12,020
Pfizer, Inc.		372		13,478
PRA Health Sciences, Inc. (a)		230		35,266
Premier, Inc. Class A		259		8,767
Viatris, Inc. (a)		976		13,635
Zoetis, Inc.		272		42,834
				1,136,055
				9,892,692
Energy — 1.1%
Energy – Alternate Sources — 0.5%
Enphase Energy, Inc. (a)		578		93,729
First Solar, Inc. (a)		627		54,737
SolarEdge Technologies, Inc. (a)		360		103,478
				251,944
Oil & Gas — 0.4%
Cabot Oil & Gas Corp.		2,899		54,443
EQT Corp.		6,572		122,108
				176,551
Oil & Gas Services — 0.0%
Baker Hughes Co.		504		10,891
Pipelines — 0.2%
Antero Midstream Corp.		1,445		13,048
Cheniere Energy, Inc. (a)		459		33,053
The Williams Cos., Inc.		1,513		35,843
				81,944
				521,330
Financial — 12.4%
Banks — 2.6%
The Bank of New York Mellon Corp.		271		12,816
Bank OZK		690		28,186
Citizens Financial Group, Inc.		775		34,216
Comerica, Inc.		182		13,057
Commerce Bancshares, Inc.		432		33,095
Cullen/Frost Bankers, Inc.		154		16,749
East West Bancorp, Inc.		556		41,033
Fifth Third Bancorp		1,124		42,094
First Citizens BancShares, Inc. Class A		49		40,953
First Republic Bank		413		68,868
The Goldman Sachs Group, Inc.		257		84,039
Huntington Bancshares, Inc.		1,488		23,391
KeyCorp		1,096		21,898
M&T Bank Corp.		80		12,129
Morgan Stanley		1,812		140,720
Northern Trust Corp.		288		30,272
Pinnacle Financial Partners, Inc.		203		17,998
The PNC Financial Services Group, Inc.		138		24,207
Popular, Inc.		336		23,627
Prosperity Bancshares, Inc.		144		10,784
Regions Financial Corp.		2,680		55,369
Signature Bank		83		18,766
State Street Corp.		570		47,886
SVB Financial Group (a)		513		253,248
Synovus Financial Corp.		436		19,947
Truist Financial Corp.		214		12,480
Western Alliance Bancorp		527		49,770
Zions Bancorp NA		236		12,970
				1,190,568

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Diversified Financial Services — 3.5%
Affiliated Managers Group, Inc.		362	$	53,949
Air Lease Corp.		247		12,103
Ally Financial, Inc.		2,254		101,903
American Express Co.		156		22,065
Ameriprise Financial, Inc.		591		137,378
Apollo Global Management, Inc.		547		25,714
BlackRock, Inc.		85		64,087
Capital One Financial Corp.		299		38,042
The Charles Schwab Corp.		391		25,485
Discover Financial Services		593		56,329
Evercore, Inc. Class A		738		97,224
Franklin Resources, Inc.		426		12,610
Interactive Brokers Group, Inc. Class A		1,245		90,935
Intercontinental Exchange, Inc.		336		37,524
Invesco Ltd.		1,726		43,530
Jefferies Financial Group, Inc.		3,715		111,821
Lazard Ltd. Class A		881		38,332
LPL Financial Holdings, Inc.		436		61,982
Nasdaq, Inc.		396		58,394
OneMain Holdings, Inc.		665		35,724
Raymond James Financial, Inc.		751		92,043
Rocket Cos., Inc. Class A (b)		1,846		42,624
Santander Consumer USA Holdings, Inc.		547		14,802
SLM Corp.		6,373		114,523
Synchrony Financial		942		38,302
T. Rowe Price Group, Inc.		517		88,717
Tradeweb Markets, Inc. Class A		804		59,496
Virtu Financial, Inc. Class A		626		19,437
The Western Union Co.		537		13,242
				1,608,317
Insurance — 3.6%
Aflac, Inc.		697		35,672
Alleghany Corp. (a)		17		10,647
The Allstate Corp.		524		60,208
American Financial Group, Inc.		197		22,478
American International Group, Inc.		380		17,560
Aon PLC Class A		100		23,011
Arch Capital Group Ltd. (a)		535		20,528
Arthur J Gallagher & Co.		764		95,324
Assurant, Inc.		548		77,690
Athene Holding Ltd. Class A (a)		498		25,099
Axis Capital Holdings Ltd.		283		14,028
Berkshire Hathaway, Inc. Class B (a)		68		17,372
Brighthouse Financial, Inc. (a)		274		12,125
Brown & Brown, Inc.		1,122		51,287
Chubb Ltd.		265		41,862
Cincinnati Financial Corp.		164		16,907
Erie Indemnity Co. Class A		236		52,135
Everest Re Group Ltd.		111		27,507
Fidelity National Financial, Inc.		482		19,598
First American Financial Corp.		472		26,739
Globe Life, Inc.		270		26,090
The Hanover Insurance Group, Inc.		137		17,736
The Hartford Financial Services Group, Inc.		393		26,248
Kemper Corp.		430		34,280
Lincoln National Corp.		174		10,835
Loews Corp.		453		23,230
Markel Corp. (a)		31		35,328
Marsh & McLennan Cos., Inc.		252		30,694
Mercury General Corp.		270		16,419
MetLife, Inc.		1,105		67,173
MGIC Investment Corp.		1,148		15,900
Old Republic International Corp.		954		20,835
Primerica, Inc.		204		30,155
Principal Financial Group, Inc.		1,076		64,517
The Progressive Corp.		2,728		260,824
Prudential Financial, Inc.		432		39,355
Reinsurance Group of America, Inc.		73		9,202
RenaissanceRe Holdings Ltd.		169		27,082
The Travelers Cos., Inc.		641		96,406
Unum Group		434		12,078
Voya Financial, Inc.		471		29,974
W.R. Berkley Corp.		475		35,791
Willis Towers Watson PLC		149		34,103
				1,632,032
Private Equity — 0.1%
KKR & Co., Inc.		1,007		49,192
Real Estate — 0.2%
CBRE Group, Inc. Class A (a)		878		69,458
Jones Lang LaSalle, Inc. (a)		75		13,428
				82,886

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Real Estate Investment Trusts (REITS) — 2.4%
AGNC Investment Corp.		2,041	$	34,207
Alexandria Real Estate Equities, Inc.		165		27,109
American Campus Communities, Inc.		247		10,663
American Homes 4 Rent Class A		917		30,573
American Tower Corp.		67		16,017
Americold Realty Trust (b)		505		19,427
Apartment Income REIT Corp.		213		9,108
Apartment Investment and Management Co. Class A		213		1,308
AvalonBay Communities, Inc.		70		12,916
Camden Property Trust		173		19,014
CoreSite Realty Corp.		215		25,768
Corporate Office Properties Trust		453		11,927
Crown Castle International Corp.		215		37,008
CubeSmart		818		30,945
CyrusOne, Inc.		407		27,562
Digital Realty Trust, Inc.		427		60,139
Duke Realty Corp.		1,208		50,651
Equinix, Inc.		70		47,571
Equity Commonwealth		516		14,345
Equity LifeStyle Properties, Inc.		163		10,373
Equity Residential		138		9,885
Essex Property Trust, Inc.		56		15,223
Extra Space Storage, Inc.		363		48,116
First Industrial Realty Trust, Inc.		499		22,849
Gaming and Leisure Properties, Inc.		730		30,974
Healthcare Trust of America, Inc. Class A		331		9,129
Healthpeak Properties, Inc.		554		17,584
Host Hotels & Resorts, Inc.		870		14,659
Invitation Homes, Inc.		620		19,834
Iron Mountain, Inc.		553		20,467
Lamar Advertising Co. Class A		160		15,027
Life Storage, Inc.		354		30,426
Medical Properties Trust, Inc.		1,016		21,620
Mid-America Apartment Communities, Inc.		197		28,439
Omega Healthcare Investors, Inc.		317		11,612
Prologis, Inc.		330		34,980
Public Storage		157		38,741
Realty Income Corp.		174		11,049
Rexford Industrial Realty, Inc.		354		17,842
SBA Communications Corp.		154		42,743
STORE Capital Corp.		320		10,720
Sun Communities, Inc.		101		15,154
UDR, Inc.		259		11,360
Ventas, Inc.		385		20,536
VICI Properties, Inc. (b)		1,561		44,083
Welltower, Inc.		155		11,103
Weyerhaeuser Co.		650		23,140
WP Carey, Inc.		243		17,195
				1,111,121
Savings & Loans — 0.0%
New York Community Bancorp, Inc.		872		11,005
				5,685,121
Industrial — 17.8%
Aerospace & Defense — 0.6%
General Dynamics Corp.		143		25,963
HEICO Corp.		90		11,322
HEICO Corp. Class A		301		34,194
Howmet Aerospace, Inc.		1,374		44,147
L3 Harris Technologies, Inc.		146		29,591
Lockheed Martin Corp.		61		22,539
Northrop Grumman Corp.		75		24,273
Teledyne Technologies, Inc. (a)		111		45,915
TransDigm Group, Inc. (a)		43		25,281
				263,225
Building Materials — 1.8%
Carrier Global Corp.		2,084		87,986
Eagle Materials, Inc.		207		27,823
Fortune Brands Home & Security, Inc.		1,428		136,831
Johnson Controls International PLC		1,614		96,307
Lennox International, Inc.		222		69,173
Martin Marietta Materials, Inc.		108		36,269
Masco Corp.		1,653		99,015
MDU Resources Group, Inc.		569		17,986
Owens Corning		1,101		101,391
Trex Co., Inc. (a)		1,059		96,941
Vulcan Materials Co.		212		35,775
				805,497

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Electrical Components & Equipment — 0.8%
AMETEK, Inc.		532	$	67,952
Emerson Electric Co.		538		48,538
Generac Holdings, Inc. (a)		540		176,823
Littelfuse, Inc.		176		46,542
Universal Display Corp.		97		22,967
				362,822
Electronics — 2.2%
Agilent Technologies, Inc.		632		80,352
Allegion PLC		138		17,335
Amphenol Corp. Class A		1,002		66,102
Arrow Electronics, Inc. (a)		752		83,337
Fortive Corp.		745		52,627
Garmin Ltd.		448		59,069
Honeywell International, Inc.		151		32,777
Hubbell, Inc.		312		58,310
Jabil, Inc.		823		42,928
Keysight Technologies, Inc. (a)		412		59,081
Mettler-Toledo International, Inc. (a)		78		90,144
nVent Electric PLC		421		11,750
Sensata Technologies Holding PLC (a)		322		18,660
SYNNEX Corp.		994		114,151
Trimble, Inc. (a)		1,790		139,244
Vontier Corp. (a)		1,141		34,538
Waters Corp. (a)		94		26,712
Woodward, Inc.		107		12,907
				1,000,024
Engineering & Construction — 0.5%
AECOM (a)		1,416		90,780
frontdoor, Inc. (a)		306		16,447
Jacobs Engineering Group, Inc.		917		118,541
				225,768
Environmental Controls — 0.4%
Clean Harbors, Inc. (a)		115		9,667
Pentair PLC		1,120		69,798
Republic Services, Inc.		505		50,172
Stericycle, Inc. (a)		254		17,147
Waste Management, Inc.		430		55,479
				202,263
Hand & Machine Tools — 0.8%
Lincoln Electric Holdings, Inc.		506		62,208
MSA Safety, Inc.		178		26,703
Regal Beloit Corp.		969		138,257
Snap-on, Inc.		284		65,530
Stanley Black & Decker, Inc.		380		75,875
				368,573
Machinery – Construction & Mining — 0.5%
BWX Technologies, Inc.		180		11,869
Caterpillar, Inc.		463		107,356
Oshkosh Corp.		198		23,495
Vertiv Holdings Co.		5,245		104,900
				247,620
Machinery – Diversified — 2.3%
AGCO Corp.		902		129,572
Cognex Corp.		671		55,686
Deere & Co.		509		190,437
Dover Corp.		456		62,531
Graco, Inc.		1,110		79,498
IDEX Corp.		241		50,446
Ingersoll Rand, Inc. (a)		809		39,811
The Middleby Corp. (a)		495		82,046
Nordson Corp.		291		57,816
Otis Worldwide Corp.		852		58,320
Rockwell Automation, Inc.		302		80,163
The Toro Co.		499		51,467
Westinghouse Air Brake Technologies Corp.		331		26,202
Xylem, Inc.		755		79,411
				1,043,406
Metal Fabricate & Hardware — 0.3%
The Timken Co.		1,395		113,232
Valmont Industries, Inc.		202		48,010
				161,242

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Miscellaneous - Manufacturing — 2.0%
3M Co.		152	$	29,287
A.O. Smith Corp.		1,230		83,160
Axon Enterprise, Inc. (a)		456		64,943
Carlisle Cos., Inc.		162		26,662
Donaldson Co., Inc.		324		18,844
Eaton Corp. PLC		1,031		142,567
General Electric Co.		1,716		22,531
Illinois Tool Works, Inc.		233		51,614
ITT, Inc.		334		30,364
Parker-Hannifin Corp.		472		148,883
Textron, Inc.		1,325		74,306
Trane Technologies PLC		1,176		194,699
Trinity Industries, Inc.		761		21,681
				909,541
Packaging & Containers — 2.1%
Amcor PLC		9,029		105,459
AptarGroup, Inc.		365		51,709
Ball Corp.		1,490		126,263
Berry Global Group, Inc. (a)		2,104		129,186
Crown Holdings, Inc.		1,948		189,034
Graphic Packaging Holding Co.		1,816		32,978
Packaging Corp. of America		836		112,425
Sealed Air Corp.		1,283		58,787
Silgan Holdings, Inc.		1,222		51,361
Sonoco Products Co.		447		28,295
WestRock Co.		1,486		77,346
				962,843
Transportation — 3.5%
C.H. Robinson Worldwide, Inc.		1,583		151,066
CSX Corp.		924		89,092
Expeditors International of Washington, Inc.		929		100,044
FedEx Corp.		719		204,225
J.B. Hunt Transport Services, Inc.		533		89,581
Kansas City Southern		417		110,055
Knight-Swift Transportation Holdings, Inc.		1,584		76,174
Landstar System, Inc.		464		76,588
Norfolk Southern Corp.		356		95,593
Old Dominion Freight Line, Inc.		585		140,640
Ryder System, Inc.		916		69,295
Schneider National, Inc. Class B		935		23,347
Union Pacific Corp.		143		31,519
United Parcel Service, Inc. Class B		487		82,785
XPO Logistics, Inc. (a)		1,947		240,065
				1,580,069
				8,132,893
Technology — 14.9%
Computers — 3.1%
Accenture PLC Class A		105		29,006
Amdocs Ltd.		328		23,009
Apple, Inc.		444		54,235
CACI International, Inc. Class A (a)		121		29,846
Cognizant Technology Solutions Corp. Class A		1,342		104,837
Crowdstrike Holdings, Inc. Class A (a) (b)		425		77,567
Dell Technologies C (a)		5,150		453,972
EPAM Systems, Inc. (a)		311		123,371
Fortinet, Inc. (a)		256		47,211
Genpact Ltd.		532		22,780
Globant SA (a)		357		74,117
HP, Inc.		4,808		152,654
International Business Machines Corp.		193		25,719
Leidos Holdings, Inc.		584		56,227
Lumentum Holdings, Inc. (a)		342		31,242
NetApp, Inc.		407		29,577
Pure Storage, Inc. Class A (a)		703		15,143
Science Applications International Corp.		535		44,721
Zscaler, Inc. (a)		273		46,866
				1,442,100

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Office & Business Equipment — 0.3%
Zebra Technologies Corp. Class A (a)		282	$	136,821
Semiconductors — 4.5%
Advanced Micro Devices, Inc. (a)		533		41,840
Analog Devices, Inc.		312		48,385
Applied Materials, Inc.		942		125,851
Broadcom, Inc.		71		32,920
Cirrus Logic, Inc. (a)		173		14,669
Cree, Inc. (a)		558		60,337
Entegris, Inc.		1,307		146,123
Inphi Corp. (a)		353		62,979
IPG Photonics Corp. (a)		247		52,102
KLA Corp.		450		148,680
Lam Research Corp.		227		135,119
Marvell Technology Group Ltd.		3,322		162,712
Maxim Integrated Products, Inc.		1,106		101,055
Microchip Technology, Inc.		530		82,267
Micron Technology, Inc. (a)		1,003		88,475
MKS Instruments, Inc.		279		51,732
Monolithic Power Systems, Inc.		274		96,780
NVIDIA Corp.		27		14,416
ON Semiconductor Corp. (a)		2,086		86,798
Qorvo, Inc. (a)		512		93,542
QUALCOMM, Inc.		385		51,047
Skyworks Solutions, Inc.		524		96,143
Teradyne, Inc.		1,107		134,700
Texas Instruments, Inc.		209		39,499
Xilinx, Inc.		617		76,446
				2,044,617
Software — 7.0%
Activision Blizzard, Inc.		784		72,912
Adobe, Inc. (a)		39		18,539
Akamai Technologies, Inc. (a)		652		66,439
Alteryx, Inc. Class A (a)		158		13,108
ANSYS, Inc. (a)		147		49,915
Aspen Technology, Inc. (a)		191		27,567
Atlassian Corp. PLC Class A (a)		340		71,658
Autodesk, Inc. (a)		203		56,261
Bill.com Holdings, Inc. (a)		425		61,838
Black Knight, Inc. (a)		809		59,858
Broadridge Financial Solutions, Inc.		435		66,599
Cadence Design Systems, Inc. (a)		1,060		145,209
CDK Global, Inc.		200		10,812
Ceridian HCM Holding, Inc. (a)		514		43,315
Cerner Corp.		431		30,980
Change Healthcare, Inc. (a)		1,647		36,399
Citrix Systems, Inc.		416		58,390
Cloudflare, Inc. Class A (a)		443		31,125
Concentrix Corp. (a)		425		63,631
Coupa Software, Inc. (a)		234		59,548
Datadog, Inc. Class A (a)		598		49,837
DocuSign, Inc. (a)		318		64,379
Dropbox, Inc. Class A (a)		711		18,955
Dynatrace, Inc. (a)		438		21,129
Elastic NV (a)		325		36,140
Electronic Arts, Inc.		592		80,139
Everbridge, Inc. (a)		228		27,629
Fair Isaac Corp. (a)		118		57,354
Fastly, Inc. Class A (a) (b)		500		33,640
Fidelity National Information Services, Inc.		94		13,217
Fiserv, Inc. (a)		89		10,595
Five9, Inc. (a)		422		65,971
Guidewire Software, Inc. (a)		150		15,245
HubSpot, Inc. (a)		191		86,754
Intuit, Inc.		128		49,032
Jack Henry & Associates, Inc.		213		32,316
Manhattan Associates, Inc. (a)		296		34,744
Microsoft Corp.		124		29,235
MongoDB, Inc. (a)		210		56,160
MSCI, Inc.		227		95,177
Nuance Communications, Inc. (a)		2,247		98,059
Oracle Corp.		225		15,788
PagerDuty, Inc. (a) (b)		269		10,822
Paychex, Inc.		398		39,012
Paycom Software, Inc. (a)		151		55,879
Pegasystems, Inc.		214		24,469
PTC, Inc. (a)		537		73,918

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
RealPage, Inc. (a)	483	$	42,118
RingCentral, Inc. Class A (a)	260		77,449
Roper Technologies, Inc.	126		50,821
salesforce.com, Inc. (a)	86		18,221
ServiceNow, Inc. (a)	103		51,511
Slack Technologies, Inc. Class A (a)	631		25,638
Smartsheet, Inc. Class A (a)	302		19,304
Splunk, Inc. (a)	189		25,606
SS&C Technologies Holdings, Inc	810		56,595
Synopsys, Inc. (a)	501		124,138
Take-Two Interactive Software, Inc. (a)	501		88,527
Twilio, Inc. Class A (a)	220		74,967
Tyler Technologies, Inc. (a)	151		64,104
Veeva Systems, Inc. Class A (a)	331		86,470
VMware, Inc. Class A (a)	134		20,160
Workday, Inc. Class A (a)	171		42,482
Zoom Video Communications, Inc. Class A (a)	90		28,916
Zynga, Inc. Class A (a)	5,300		54,113
			3,190,838
			6,814,376
Utilities — 2.8%
Electric — 2.4%
AES Corp.	4,139		110,967
Alliant Energy Corp.	559		30,275
Ameren Corp.	766		62,322
American Electric Power Co., Inc.	287		24,309
CenterPoint Energy, Inc.	1,435		32,503
CMS Energy Corp.	715		43,772
Consolidated Edison, Inc.	382		28,574
Dominion Energy, Inc.	327		24,839
DTE Energy Co.	516		68,700
Duke Energy Corp.	645		62,262
Edison International	249		14,591
Entergy Corp.	386		38,395
Evergy, Inc.	441		26,253
Eversource Energy	573		49,616
Exelon Corp.	1,415		61,892
IDACORP, Inc.	98		9,797
NextEra Energy, Inc.	493		37,276
NRG Energy, Inc.	438		16,526
OGE Energy Corp.	262		8,478
PG&E Corp. (a)	2,638		30,891
Pinnacle West Capital Corp.	362		29,449
PPL Corp.	793		22,870
Public Service Enterprise Group, Inc.	1,026		61,776
Sempra Energy	178		23,599
The Southern Co.	707		43,947
Vistra Corp.	807		14,268
WEC Energy Group, Inc.	560		52,410
Xcel Energy, Inc.	1,088		72,363
			1,102,920
Gas — 0.2%
Atmos Energy Corp.	163		16,112
National Fuel Gas Co.	257		12,847
NiSource, Inc.	1,026		24,737
UGI Corp.	456		18,701
			72,397
Water — 0.2%
American Water Works Co., Inc.	575		86,204
Essential Utilities, Inc.	280		12,530
			98,734
			1,274,051
TOTAL COMMON STOCK (Cost $42,162,581)			45,623,338
TOTAL EQUITIES (Cost $42,162,581)			45,623,338

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Mutual Funds — 0.1%
Diversified Financial Services — 0.1%
State Street Navigator Securities Lending Prime Portfolio (c)		55,400	$	55,400
TOTAL MUTUAL FUNDS (Cost $55,400)				55,400
TOTAL LONG-TERM INVESTMENTS (Cost $42,217,981)				45,678,738
TOTAL INVESTMENTS — 100.0% (Cost $42,217,981) (d)				45,678,738
Other Assets/(Liabilities) — (0.0)%				(175	)
NET ASSETS — 100.0%			$	45,678,563

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 March 31, 2021, was $772,331 or 1.69% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $733,283 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)	See Note 3 for aggregate cost for federal tax purposes.

MML High Yield Fund —  Portfolio of Investments

March 31, 2021 (Unaudited)

	Number of Shares		Value
Equities — 1.1%
Common Stock — 1.1%
Energy — 1.1%
Oil & Gas — 1.1%
Fieldwood Energy LLC  (a)		3,193	$	—
Fieldwood Energy LLC (a)		13,011		—
Tourmaline Oil Corp.		45,264		861,553
Tourmaline Oil Corp. (Escrow Shares) (a) (b) (c)		195,880		155,869
TOTAL COMMON STOCK (Cost $1,191,070)				1,017,422
TOTAL EQUITIES (Cost $1,191,070)				1,017,422

	Principal Amount		Value
Bonds & Notes — 97.0%
Bank Loans — 13.0%
Advertising — 0.5%
Clear Channel Outdoor Holdings, Inc., Term Loan B, 3 mo. USD LIBOR + 3.500%
3.712% VRN 8/21/26	$	468,621	$	449,487
Aerospace & Defense — 1.2%
AAdvantage Loyalty IP Ltd., 2021 Term Loan,
0.000% 4/20/28 (d)		506,512		518,385
Spin Holdco, Inc., 2021 Term Loan, 3 mo. USD LIBOR + 4.000%
4.750% VRN 3/01/28		627,323		621,496
				1,139,881
Chemicals — 0.7%
Consolidated Energy Finance, SA, Term Loan B, 1 mo. USD LIBOR + 2.500%
2.609% VRN 5/07/25		693,635		676,295
Commercial Services — 1.2%
City Brewing Company, LLC, Term Loan B,
0.000% 3/31/28 (d)		233,168		233,168
Syniverse Holdings, Inc., 2018 1st Lien Term Loan, 3 mo. USD LIBOR + 5.000%
6.000% VRN 3/09/23		903,708		890,252
				1,123,420
Entertainment — 0.3%
Delta 2 (LUX) S.A.R.L., 2018 USD Term Loan, 1 mo. USD LIBOR + 2.500%
3.500% VRN 2/01/24		259,676		256,835
Health Care – Services — 0.5%
Radiology Partners, Inc., 2018 1st Lien Term Loan B, 1 mo. USD LIBOR + 4.250%, 3 mo. USD LIBOR + 4.250%
4.357% - 5.295% VRN 7/09/25		471,000		466,879
Oil & Gas — 0.0%
Fieldwood Energy LLC, Exit 2nd Lien Term Loan, 12 mo. USD LIBOR + 0.000%
0.000% VRN4/11/23  (e)		387,384		17,917
Packaging & Containers — 2.7%
BWAY Holding Co., 2017 Term Loan B, 3 mo. USD LIBOR + 3.250%
3.443% VRN 4/03/24		1,178,374		1,151,861
Flex Acquisition Company, Inc., 2021 Term Loan, 1 mo. USD LIBOR + 3.500%
4.000% VRN 2/23/28		619,310		610,893
Proampac PG Borrower LLC, 2020 Term Loan, 1 mo. USD LIBOR + 4.000%, 3 mo. USD LIBOR + 4.000%
5.000% VRN 11/03/25		681,195		680,234
Trident TPI Holdings, Inc., 2017 USD Term Loan B1, 3 mo. USD LIBOR + 3.000%
4.000% VRN 10/17/24		160,890		159,106
				2,602,094
Retail — 0.5%
Great Outdoors Group LLC, 2021 Term Loan B, 6 mo. USD LIBOR + 4.250%
5.000% VRN 3/06/28		468,969		469,203
Software — 5.4%
Banff Merger Sub, Inc., 2021 USD Term Loan, 1 mo. USD LIBOR + 3.750%
3.859% VRN 10/02/25		763,358		759,541
Cvent, Inc., 1st Lien Term Loan, 2 mo. USD LIBOR + 3.750%
3.900% VRN 11/29/24		778,411		756,250
Finastra USA, Inc.
USD 1st Lien Term Loan, 3 mo. USD LIBOR + 3.500%
4.500% VRN 6/13/24		1,679,768		1,644,560
USD 2nd Lien Term Loan, 6 mo. USD LIBOR + 7.250%
8.250% VRN 6/13/25		1,400,000		1,405,250
Renaissance Holding Corp., 2018 2nd Lien Term Loan, 1 mo. USD LIBOR + 7.000%
7.203% VRN 5/29/26		539,037		536,881
				5,102,482
TOTAL BANK LOANS (Cost $12,424,123)				12,304,493

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Corporate Debt — 84.0%
Advertising — 1.1%
Clear Channel Outdoor Holdings, Inc.
7.750% 4/15/28 (f)	$	301,000	$	298,390
Outfront Media Capital LLC / Outfront Media Capital Corp.
4.250% 1/15/29 (f)		141,000		135,744
Terrier Media Buyer, Inc.
8.875% 12/15/27 (f)		523,000		562,774
				996,908
Aerospace & Defense — 2.6%
TransDigm, Inc.
4.625% 1/15/29 (f)		160,000		157,566
6.250% 3/15/26 (f)		316,000		334,929
6.375% 6/15/26		154,000		159,198
8.000% 12/15/25 (f)		255,000		277,695
Triumph Group, Inc.
6.250% 9/15/24 (f)		306,000		310,498
7.750% 8/15/25		1,243,000		1,249,215
				2,489,101
Airlines — 1.6%
American Airlines, Inc.
11.750% 7/15/25 (f)		379,000		468,539
American Airlines, Inc. /AAdvantage Loyalty IP Ltd.
5.500% 4/20/26 (f)		535,000		557,737
5.750% 4/20/29 (f)		229,000		244,068
Mileage Plus Holdings LLC / Mileage Plus Intellectual Property Assets Ltd.
6.500% 6/20/27 (f)		265,000		290,175
				1,560,519
Auto Manufacturers — 4.5%
Ford Motor Co.
7.450% 7/16/31		472,000		595,112
8.500% 4/21/23		312,000		347,880
9.000% 4/22/25		241,000		291,879
9.625% 4/22/30		726,000		1,013,162
Ford Motor Credit Co. LLC
4.125% 8/17/27		289,000		298,392
4.134% 8/04/25		200,000		209,185
4.542% 8/01/26		1,039,000		1,099,470
JB Poindexter & Co., Inc.
7.125% 4/15/26 (f)		435,000		459,469
				4,314,549
Auto Parts & Equipment — 1.0%
Adient Global Holdings Ltd.
4.875% 8/15/26 (f)		170,000		174,463
American Axle & Manufacturing, Inc.
6.500% 4/01/27		219,000		227,212
Clarios Global LP/Clarios US Finance Co.
8.500% 5/15/27 (f)		467,000		502,847
				904,522
Building Materials — 0.4%
Cornerstone Building Brands, Inc.
6.125% 1/15/29 (f)		171,000		182,115
CP Atlas Buyer, Inc.
7.000% 12/01/28 (f)		208,000		218,618
				400,733
Chemicals — 1.4%
CF Industries, Inc.
4.950% 6/01/43		63,000		72,156
5.375% 3/15/44		240,000		284,700
Consolidated Energy Finance SA
6.875% 6/15/25 (f)		815,000		830,281
Nouryon Holding BV
8.000% 10/01/26 (f)		141,000		149,783
				1,336,920
Coal — 2.3%
Peabody Energy Corp.
8.500% 12/31/24 (f)		583,000		244,860
PIC AU Holdings LLC / PIC AU Holdings Corp.
10.000% 12/31/24 (f)		656,000		601,880
SunCoke Energy Partners LP/SunCoke Energy Partners Finance Corp.
7.500% 6/15/25 (f)		759,000		788,411
Warrior Met Coal, Inc.
8.000% 11/01/24 (f)		534,000		547,350
				2,182,501

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Commercial Services — 0.6%
Alta Equipment Group, Inc.
5.625% 4/15/26 (f) (g)	$	60,000	$	60,825
NESCO Holdings II, Inc.
5.500% 4/15/29 (f) (g)		43,000		44,097
Prime Security Services Borrower LLC / Prime Finance, Inc.
6.250% 1/15/28 (f)		487,000		506,962
				611,884
Computers — 1.3%
Banff Merger Sub, Inc.
9.750% 9/01/26 (f)		466,000		496,560
Diebold Nixdorf, Inc.
9.375% 7/15/25 (f)		675,000		751,781
				1,248,341
Distribution & Wholesale — 1.3%
Core & Main Holdings LP
8.625% 9/15/24 (f)		155,000		157,325
Core & Main LP
6.125% 8/15/25 (f)		313,000		321,244
Resideo Funding, Inc.
6.125% 11/01/26 (f)		433,000		456,127
Univar Solutions USA, Inc.
5.125% 12/01/27 (f)		254,000		264,317
				1,199,013
Diversified Financial Services — 3.3%
Alliance Data Systems Corp.
4.750% 12/15/24 (f)		767,000		787,134
7.000% 1/15/26 (f)		169,000		180,864
Global Aircraft Leasing Co. Ltd.
6.500% 9/15/24 (f)		1,445,880		1,386,599
OneMain Finance Corp.
4.000% 9/15/30		169,000		164,352
5.375% 11/15/29		552,000		587,190
				3,106,139
Electric — 1.7%
FirstEnergy Corp.
2.250% 9/01/30		148,000		137,270
5.350% STEP 7/15/47		352,000		395,357
7.375% 11/15/31		48,000		64,186
PG&E Corp.
5.000% 7/01/28		567,000		599,021
Pike Corp.
5.500% 9/01/28 (f)		447,000		454,823
				1,650,657
Engineering & Construction — 0.5%
Arcosa, Inc. Co.
4.375% 4/15/29 (f) (g)		108,000		108,000
New Enterprise Stone & Lime Co., Inc.
9.750% 7/15/28 (f)		323,000		361,760
				469,760
Entertainment — 2.1%
Banijay Entertainment SASU
5.375% 3/01/25 (f)		241,000		248,832
Caesars Entertainment, Inc.
8.125% 7/01/27 (f)		443,000		488,718
Caesars Resort Collection LLC/CRC Finco, Inc.
5.250% 10/15/25 (f)		266,000		268,305
CCM Merger, Inc.
6.375% 5/01/26 (f)		193,000		204,941
Live Nation Entertainment, Inc.
4.750% 10/15/27 (f)		407,000		410,052
Scientific Games International, Inc.
7.250% 11/15/29 (f)		187,000		202,895
8.250% 3/15/26 (f)		37,000		39,683
8.625% 7/01/25 (f)		147,000		159,818
				2,023,244
Food — 3.9%
JBS USA LUX SA/JBS USA Finance, Inc.
6.750% 2/15/28 (f)		824,000		905,617
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc.
5.500% 1/15/30 (f)		826,000		914,171
6.500% 4/15/29 (f)		1,094,000		1,235,673
Kraft Heinz Foods Co.
4.250% 3/01/31		204,000		224,662
6.875% 1/26/39		206,000		283,218
Simmons Foods, Inc. /Simmons Prepared Foods, Inc. /Simmons Pet Food, Inc. /Simmons Feed
4.625% 3/01/29 (f)		161,000		162,412
				3,725,753

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Forest Products & Paper — 0.2%
Clearwater Paper Corp.
4.750% 8/15/28 (f)	$	230,000	$	231,725
Health Care – Services — 1.9%
CHS/Community Health Systems, Inc.
4.750% 2/15/31 (f)		108,000		105,505
Molina Healthcare, Inc.
4.375% 6/15/28 (f)		200,000		205,792
Radiology Partners, Inc.
9.250% 2/01/28 (f)		300,000		326,625
Tenet Healthcare Corp.
4.625% 7/15/24		400,000		406,700
4.625% 9/01/24 (f)		323,000		332,286
6.125% 10/01/28 (f)		350,000		364,525
US Acute Care Solutions LLC
6.375% 3/01/26 (f)		99,000		102,713
				1,844,146
Home Builders — 2.7%
Brookfield Residential Properties, Inc.
6.375% 5/15/25 (f)		491,000		502,661
Brookfield Residential Properties, Inc. / Brookfield Residential US Corp.
4.875% 2/15/30 (f)		261,000		261,162
Empire Communities Corp.
7.000% 12/15/25 (f)		123,000		129,611
M/I Homes, Inc.
4.950% 2/01/28		368,000		381,110
Mattamy Group Corp.
4.625% 3/01/30 (f)		668,000		663,511
STL Holding Co. LLC
7.500% 2/15/26 (f)		440,000		457,600
TRI Pointe Group, Inc.
5.700% 6/15/28		153,000		169,097
				2,564,752
Insurance — 0.5%
AssuredPartners, Inc.
5.625% 1/15/29 (f)		152,000		154,888
Highlands Holdings Bond Issuer Ltd. / Highlands Holdings Bond Co-Issuer, Inc.
7.625% 10/15/25 (f)		293,000		314,243
				469,131
Internet — 1.6%
Endure Digital, Inc.
6.000% 2/15/29 (f)		350,000		341,687
Netflix, Inc.
5.375% 11/15/29 (f)		523,000		618,474
Northwest Fiber LLC / Northwest Fiber Finance Sub, Inc.
6.000% 2/15/28 (f)		171,000		170,573
10.750% 6/01/28 (f)		169,000		190,919
Uber Technologies, Inc.
6.250% 1/15/28 (f)		174,000		188,127
				1,509,780
Iron & Steel — 0.4%
United States Steel Corp.
6.875% 3/01/29		361,000		370,025
Leisure Time — 2.2%
Carlson Travel, Inc.
6.750% 12/15/25 (f)		296,000		270,840
11.500% 12/15/26 (f)		894,257		679,635
Carnival Corp.
5.750% 3/01/27 (f)		487,000		500,617
NCL Corp. Ltd.
5.875 % 3/15/26 (f)		499,000		505,682
NCL Finance Ltd.
6.125% 3/15/28 (f)		94,000		95,762
				2,052,536
Lodging — 1.6%
Wyndham Destinations, Inc.
6.625% 7/31/26 (f)		213,000		241,830
Wyndham Hotels & Resorts, Inc.
4.375% 8/15/28 (f)		185,000		187,127
Wynn Las Vegas LLC/Wynn Las Vegas Capital Corp.
5.500% 3/01/25 (f)		740,000		781,810
Wynn Macau Ltd.
5.125% 12/15/29 (f)		268,000		274,700
				1,485,467

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Machinery – Diversified — 0.4%
Clark Equipment Co.
5.875% 6/01/25 (f)	$	321,000	$	339,458
Media — 4.7%
Altice Financing SA
5.000% 1/15/28 (f)		316,000		312,464
CCO Holdings LLC/CCO Holdings Capital Corp.
4.750% 3/01/30 (f)		236,000		244,555
Clear Channel Worldwide Holdings, Inc.
5.125% 8/15/27 (f)		313,000		315,050
9.250% 2/15/24		209,000		217,423
DISH DBS Corp.
7.750% 7/01/26		217,000		239,026
DISH Network Corp.
3.375% 8/15/26		680,000		653,684
iHeartCommunications, Inc.
8.375% 5/01/27		482,000		517,547
LCPR Senior Secured Financing DAC
5.125% 7/15/29 (f)		465,000		473,193
6.750% 10/15/27 (f)		314,000		334,771
McGraw Hill LLC / McGraw-Hill Global Education Finance, Inc.
8.000% 11/30/24 (f)		359,000		362,159
Midcontinent Communications / Midcontinent Finance Corp.
5.375% 8/15/27 (f)		205,000		213,139
Nexstar Broadcasting, Inc.
4.750% 11/01/28 (f)		118,000		119,243
Virgin Media Finance PLC
5.000% 7/15/30 (f)		147,000		146,816
Virgin Media Secured Finance PLC
4.500% 8/15/30 (f)		280,000		282,450
				4,431,520
Mining — 4.6%
Compass Minerals International, Inc.
4.875% 7/15/24 (f)		294,000		304,725
6.750% 12/01/27 (f)		192,000		205,440
First Quantum Minerals Ltd.
6.875% 10/15/27 (f)		600,000		643,500
7.250% 4/01/23 (f)		659,000		670,532
7.500% 4/01/25 (f)		647,000		668,027
Freeport-McMoRan, Inc.
4.125% 3/01/28		69,000		72,533
4.375% 8/01/28		359,000		380,809
4.625% 8/01/30		200,000		217,645
Hecla Mining Co.
7.250% 2/15/28		423,000		453,668
Hudbay Minerals, Inc.
6.125% 4/01/29 (f)		147,000		156,923
Kinross Gold Corp.
6.875% 9/01/41		476,000		618,104
Northwest Acquisitions ULC/Dominion Finco, Inc.
7.125% 11/01/22 (e) (f)		884,000		88
				4,391,994
Miscellaneous - Manufacturing — 0.8%
Gates Global LLC / Gates Corp.
6.250% 1/15/26 (f)		700,000		733,250
Oil & Gas — 9.7%
Antero Resources Corp.
7.625% 2/01/29 (f)		62,000		66,030
8.375% 7/15/26 (f)		156,000		171,990
Apache Corp.
4.750% 4/15/43		65,000		60,288
5.100% 9/01/40		130,000		127,075
5.350% 7/01/49		197,000		188,135
Chesapeake Energy Corp.
5.500% 2/01/26 (f)		90,000		93,681
5.875% 2/01/29 (f)		182,000		192,920
Comstock Resources, Inc.
6.750% 3/01/29 (f)		126,000		129,150
Continental Resources, Inc.
4.375% 1/15/28		168,000		177,416
CVR Energy, Inc.
5.750% 2/15/28 (f)		1,323,000		1,286,617
EQT Corp.
8.500% STEP 2/01/30		55,000		70,142

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Hilcorp Energy I LP / Hilcorp Finance Co.
5.000% 12/01/24 (f)	$	79,000	$	79,593
5.750% 10/01/25 (f)		43,000		43,108
6.250% 11/01/28 (f)		365,000		375,950
MEG Energy Corp.
7.125% 2/01/27 (f)		379,000		397,002
Murphy Oil Corp.
6.375% 7/15/28		182,000		182,227
Nabors Industries Ltd.
7.250% 1/15/26 (f)		184,000		152,720
7.500% 1/15/28 (f)		119,000		97,878
Neptune Energy Bondco PLC
6.625% 5/15/25 (f)		594,000		596,227
Occidental Petroleum Corp.
2.700% 2/15/23		32,000		31,927
2.900% 8/15/24		93,000		91,969
3.500% 6/15/25		190,000		188,100
4.200% 3/15/48		31,000		24,955
4.400% 4/15/46		198,000		167,805
4.400% 8/15/49		78,000		64,740
4.500% 7/15/44		81,000		68,850
5.875% 9/01/25		178,000		189,792
6.125% 1/01/31		210,000		231,882
6.200% 3/15/40		550,000		565,125
6.375% 9/01/28		182,000		199,764
6.450% 9/15/36		215,000		237,387
6.600% 3/15/46		352,000		374,000
6.950% 7/01/24		88,000		96,562
Ovintiv Exploration, Inc.
5.375% 1/01/26		88,000		96,602
5.625% 7/01/24		56,000		61,557
Ovintiv, Inc.
6.500% 8/15/34		108,000		129,859
6.500% 2/01/38		47,000		56,829
7.200% 11/01/31		29,000		36,109
7.375% 11/01/31		89,000		113,074
8.125% 9/15/30		84,000		108,893
Parkland Corp.
5.875% 7/15/27 (f)		247,000		263,364
PBF Holding Co. LLC / PBF Finance Corp.
6.000% 2/15/28		1,474,000		1,088,917
9.250% 5/15/25 (f)		82,000		83,613
Range Resources Corp.
8.250% 1/15/29 (f)		123,000		131,610
				9,191,434
Oil & Gas Services — 0.9%
CGG SA
8.750% 4/01/27 (f) (g)		214,000		215,648
Welltec A/S
9.500% 12/01/22 (f)		683,000		672,755
				888,403
Packaging & Containers — 1.3%
Mauser Packaging Solutions Holding Co.
7.250% 4/15/25 (f)		781,000		781,000
Trident TPI Holdings, Inc.
9.250% 8/01/24 (f)		386,000		409,160
				1,190,160
Pharmaceuticals — 2.0%
Bausch Health Americas, Inc.
8.500% 1/31/27 (f)		250,000		277,344
Bausch Health Cos., Inc.
5.000% 1/30/28 (f)		446,000		454,563
5.250% 1/30/30 (f)		320,000		321,283
Endo DAC / Endo Finance LLC / Endo Finco, Inc.
6.000% 6/30/28 (f)		181,000		146,610
Par Pharmaceutical, Inc.
7.500% 4/01/27 (f)		629,000		668,753
				1,868,553

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pipelines — 4.1%
Buckeye Partners LP
5.850% 11/15/43	$	66,000	$	64,110
Cheniere Energy Partners LP
5.625% 10/01/26		325,000		339,852
DCP Midstream Operating LP
5.625% 7/15/27		216,000		234,505
6.450% 11/03/36 (f)		10,000		11,175
EnLink Midstream LLC
5.375% 6/01/29		173,000		161,755
EnLink Midstream Partners LP
4.850% 7/15/26		56,000		54,098
5.450% 6/01/47		97,000		78,242
5.600% 4/01/44		257,000		213,310
EQM Midstream Partners LP
4.500% 1/15/29 (f)		157,000		152,990
4.750% 1/15/31 (f)		142,000		137,740
6.000% 7/01/25 (f)		182,000		195,877
6.500% 7/01/27 (f)		151,000		164,175
Genesis Energy LP/Genesis Energy Finance Corp.
6.500% 10/01/25		440,000		431,310
Harvest Midstream I LP
7.500% 9/01/28 (f)		228,000		245,032
NGL Energy Operating LLC / NGL Energy Finance Corp.
7.500% 2/01/26 (f)		229,000		234,969
Targa Resources Partners LP/Targa Resources Partners Finance Corp.
4.875% 2/01/31 (f)		295,000		298,909
5.000% 1/15/28		33,000		34,361
5.500% 3/01/30		28,000		29,400
6.875% 1/15/29		61,000		67,204
Western Midstream Operating LP
5.300% STEP 2/01/30		145,000		157,144
5.300% 3/01/48		399,000		400,412
5.450% 4/01/44		202,000		207,151
				3,913,721
Real Estate — 0.3%
Realogy Group LLC / Realogy Co-Issuer Corp.
5.750% 1/15/29 (f)		311,000		306,724
Real Estate Investment Trusts (REITS) — 2.4%
ESH Hospitality, Inc.
4.625% 10/01/27 (f)		388,000		410,364
Iron Mountain, Inc.
5.250% 7/15/30 (f)		303,000		312,635
Park Intermediate Holdings LLC / PK Domestic Property LLC / PK Finance Co-Issuer
5.875% 10/01/28 (f)		108,000		114,507
RHP Hotel Properties LP/RHP Finance Corp.
4.750% 10/15/27		425,000		435,038
Service Properties Trust
3.950% 1/15/28		73,000		67,525
4.375% 2/15/30		115,000		105,651
4.950% 2/15/27		58,000		57,348
7.500% 9/15/25		467,000		530,522
Uniti Group LP / Uniti Fiber Holdings, Inc. / CSL Capital LLC
7.125% 12/15/24 (f)		45,000		46,294
7.875% 2/15/25 (f)		25,000		27,050
8.250% 10/15/23		169,000		169,423
				2,276,357
Retail — 2.7%
BCPE Ulysses Intermediate, Inc.
7.750% 4/01/27 (f)		260,000		269,750
L Brands, Inc.
6.750% 7/01/36		97,000		114,460
6.875% 11/01/35		299,000		356,345
LBM Acquisition LLC
6.250% 1/15/29 (f)		143,000		147,290
Macy's Retail Holdings LLC
5.875% 4/01/29 (f)		40,000		41,018
NMG Holding Co., Inc. / Neiman Marcus Group LLC
7.125% 4/01/26 (f)		473,000		482,460
Nordstrom, Inc.
4.000% 3/15/27		65,000		66,950
4.375% 4/01/30		65,000		66,344
5.000% 1/15/44		331,000		325,561
Party City Holdings, Inc.
8.750% 2/15/26 (f)		75,000		77,250
Staples, Inc.
7.500% 4/15/26 (f)		461,000		486,355
Superior Plus LP / Superior General Partner, Inc.
4.500% 3/15/29 (f)		145,000		146,479
				2,580,262

MML High Yield Fund —  Portfolio of Investments (Continued)

		Principal Amount		Value
Software — 3.1%
Avaya Holdings Corp., Convertible,
2.250% 6/15/23	$	335,000	$	413,390
BY Crown Parent LLC
7.375% 10/15/24 (f)		191,000		194,104
Solera LLC/ Solera Finance, Inc.
10.500% 3/01/24 (f)		465,000		480,391
Veritas US, Inc./Veritas Bermuda Ltd.
10.500% 2/01/24(f)		1,796,000		1,838,655
				2,926,540
Storage & Warehousing — 1.2%
LBC Tank Terminals Holding Netherlands BV
6.875% 5/15/23 (f)		1,111,000		1,111,000
Telecommunications — 3.3%
Avaya, Inc.
6.125% 9/15/28 (f)		107,000		113,827
CenturyLink, Inc.
5.125% 12/15/26 (f)		110,000		115,872
CommScope Technologies Finance LLC
6.000% 6/15/25 (f)		196,000		199,930
CommScope Technologies LLC
5.000% 3/15/27 (f)		174,000		172,370
CommScope, Inc.
7.125% 7/01/28 (f)		200,000		212,416
Consolidated Communications, Inc.
6.500% 10/01/28 (f)		391,000		422,331
Hughes Satellite Systems Corp.
6.625% 8/01/26		687,000		761,265
Sprint Capital Corp.
8.750% 3/15/32		126,000		186,322
Sprint Corp.
7.625% 3/01/26		386,000		472,825
Telecom Italia Capital
6.000% 9/30/34		150,000		170,122
Windstream Escrow LLC / Windstream Escrow Finance Corp.
7.750% 8/15/28 (f)		330,000		335,362
				3,162,642
Transportation — 1.8%
Kenan Advantage Group, Inc.
7.875% 7/31/23 (f)		1,700,000		1,695,750
TOTAL CORPORATE DEBT (Cost $76,927,573)				79,755,874
TOTAL BONDS & NOTES (Cost $89,351,696)				92,060,367
TOTAL LONG-TERM INVESTMENTS (Cost $90,542,766)				93,077,789
Short-Term Investments — 2.8%
Repurchase Agreement — 2.8%
Fixed Income Clearing Corp., Repurchase Agreement, dated  3/31/21, 0.000%, due 4/01/21 (h)		2,711,288		2,711,288
TOTAL SHORT-TERM INVESTMENTS (Cost $2,711,288)				2,711,288
TOTAL INVESTMENTS — 100.9% (Cost $93,254,054) (i)				95,789,077
Other Assets/(Liabilities) — (0.9)%				(846,975	)
NET ASSETS — 100.0%			$	94,942,102

MML High Yield Fund —  Portfolio of Investments (Continued)

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)	Non-income producing security.
(b)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At March 31, 2021, these securities amounted to a value of $155,869 or 0.16% of net assets.
(c)	Investment was valued using significant unobservable inputs.
(d)	All or a portion of the security represents unsettled loan commitments at March 31, 2021 where the rate will be determined at time of settlement.
(e)	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 March 31, 2021, these securities amounted to a value of $18,005 or 0.02% of net assets.
(f)	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 March 31, 2021, the aggregate market value of these securities amounted to $54,845,760 or 57.77% of net assets.
(g)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.
(h)	Maturity value of $2,711,288. Collateralized by U.S. Government Agency obligations with a rate of 1.750%, maturity date of 12/31/24, and an aggregate market value, including accrued interest, of $2,765,603.
(i)	See Note 3 for aggregate cost for federal tax purposes.

MML Inflation-Protected and Income Fund —  Portfolio of Investments

March 31, 2021 (Unaudited)

	Principal Amount		Value
Bonds & Notes — 85.1%
Corporate Debt — 0.5%
Real Estate Investment Trusts (REITS) — 0.5%
SBA Tower Trust
3.168% 4/09/47 (a)	$	1,500,000	$	1,502,631
TOTAL CORPORATE DEBT (Cost $1,044,102)				1,502,631
Municipal Obligations — 0.0%
Louisiana State Public Facilities Authority, Revenue Bonds, Series 2011-A, Class A2, 3 mo. USD LIBOR
1.118% FRN 4/26/27		10,638		10,655
TOTAL MUNICIPAL OBLIGATIONS (Cost $10,638)				10,655
Non-U.S. Government Agency Obligations — 53.6%
Auto Floor Plan Asset-Backed Securities — 2.9%
Navistar Financial Dealer Note Master Owner Trust II
Series 2019-1, Class A, 1 mo. USD LIBOR + .640% 0.749% FRN 5/25/24  (a)		5,700,000		5,703,649
Series 2019-1, Class B, 1 mo. USD LIBOR + .750% 0.859% FRN 5/25/24  (a)		3,000,000		3,001,102
Series 2019-1, Class C, 1 mo. USD LIBOR + .950% 1.059% FRN 5/25/24  (a)		1,300,000		1,299,904
				10,004,655
Automobile Asset-Backed Securities — 4.7%
American Credit Acceptance Receivables Trust
Series 2019-1, Class C, 3.500% 4/14/25  (a)		1,118,421		1,131,552
Series 2018-3, Class C, 3.750% 10/15/24  (a)		519,060		519,752
Avis Budget Rental Car Funding AESOP LLC, Series 2019-1A, Class C
4.530% 3/20/23 (a)		388,000		397,008
CarMax Auto Owner Trust, Series 2017-2, Class D
3.390% 10/16/23		2,400,000		2,413,539
Chesapeake Funding II LLC, Series 2018-1A, Class A2, 1 mo. USD LIBOR + .450%
0.556% FRN 4/15/30  (a)		298,965		299,148
Drive Auto Receivables Trust, Series 2019-1, Class C
3.780% 4/15/25		825,944		836,882
Exeter Automobile Receivables Trust, Series 2020-2A, Class A
1.130% 8/15/23 (a)		263,983		264,543
Hertz Fleet Lease Funding LP, Series 2018-1, Class A1, 1 mo. USD LIBOR + .500%
0.606% FRN 5/10/32  (a)		757,535		757,471
Hertz Vehicle Financing II LP
Series 2017-1A, Class B, 3.560% 10/25/21  (a)		2,530,000		2,519,586
Series 2019-2A, Class C, 4.260% 5/25/25  (a)		2,525,000		2,519,884
OneMain Direct Auto Receivables Trust, Series 2018-1A, Class A
3.430% 12/16/24 (a)		260,970		262,840
OSCAR US Funding XI LLC, Series 2019-2A, Class A2
2.490% 8/10/22 (a)		385,584		386,714
Santander Drive Auto Receivables Trust, Series 2020-2, Class A2A
0.620% 5/15/23		2,028,584		2,029,804
World Omni Auto Receivables Trust, Series 2019-C, Class A2B, 1 mo. USD LIBOR + .230%
0.336% FRN 2/15/23		1,729,416		1,729,840
				16,068,563
Commercial Mortgage-Backed Securities — 3.3%
BHMS Mortgage Trust, Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500%
1.606% FRN 7/15/35  (a)		1,000,000		993,754
BX Commercial Mortgage Trust
Series 2020-BXLP, Class E, 1 mo. USD LIBOR + 1.600% 1.706% FRN 12/15/36  (a)		1,297,370		1,295,750
Series 2018-IND, Class E, 1 mo. USD LIBOR + 1.700% 1.806% FRN 11/15/35  (a)		1,582,000		1,581,999
Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000% 2.106% FRN 10/15/36  (a)		1,645,895		1,644,354
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class D, 1 mo. USD LIBOR + 1.750%
1.856% FRN 12/15/37  (a)		308,865		308,961
Credit Suisse Mortgage Capital Certificates, Series 2019-ICE4, Class D, 1 mo. USD LIBOR + 1.600%
1.706% FRN 5/15/36  (a)		4,000,000		4,002,504
JP Morgan Chase Commercial Mortgage Securities Corp., Series 2018-LAQ, Class A, 1 mo. USD LIBOR + 1.000%
1.106% FRN 6/15/32  (a)		950,066		950,065
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800%
1.906% FRN 5/15/36  (a)		476,000		475,851
				11,253,238
Home Equity Asset-Backed Securities — 2.6%
Asset Backed Securities Corp. Home Equity Loan Trust, Series 2006-HE3, Class A4, 1 mo. USD LIBOR + .170%
0.279% FRN 3/25/36		30,320		30,274
Centex Home Equity Loan Trust
Series 2006-A, Class M1, 1 mo. USD LIBOR + .300% 0.409% FRN 6/25/36		979,292		968,523
Series 2005-D, Class M3, 1 mo. USD LIBOR + .720% 0.829% FRN 10/25/35		1,946,953		1,941,840
Citigroup Mortgage Loan Trust, Inc., Series 2006-HE2, Class M1, 1 mo. USD LIBOR + .290%
0.399% FRN 8/25/36		1,428,689		1,414,201
Home Equity Asset Trust, Series 2005-9, Class M1, 1 mo. USD LIBOR + .615%
0.724% FRN 4/25/36		3,123,034		3,092,906
RASC Trust, Series 2005-EMX1, Class M1, 1 mo. USD LIBOR + .645%
0.754% FRN 3/25/35		1,239,013		1,232,066
				8,679,810

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

	Principal Amount		Value
Other Asset-Backed Securities — 25.3%
321 Henderson Receivables I LLC, Series 2006-1A, Class A1, 1 mo. USD LIBOR + .200%
0.306% FRN 3/15/41  (a)	$	179,946	$	178,173
321 Henderson Receivables LLC
Series 2006-2A, Class A1, 1 mo. USD LIBOR + .200% 0.306% FRN 6/15/41  (a)		858,040		836,635
Series 2006-3A, Class A1, 1 mo. USD LIBOR + .200% 0.306% FRN 9/15/41  (a)		95,617		93,751
Series 2006-4A, Class A1, 1 mo. USD LIBOR + .200% 0.306% FRN 12/15/41  (a)		93,294		92,679
Series 2007-1A, Class A1, 1 mo. USD LIBOR + .200% 0.306% FRN 3/15/42  (a)		509,002		492,171
Affirm Asset Securitization Trust
Series 2020-Z2, Class A, 1.900% 1/15/25  (a)		3,293,788		3,320,653
Series 2020-A, Class A, 2.100% 2/18/25  (a)		6,800,000		6,871,495
Series 2020-Z1, Class A, 3.460% 10/15/24  (a)		1,951,782		1,978,210
Series 2020-A, Class B, 3.540% 2/18/25  (a)		1,000,000		1,022,072
AIMCO CLO, Series 2015-AA, Class AR, 3 mo. USD LIBOR + .850%
1.091% FRN 1/15/28  (a)		2,197,790		2,197,942
Arbor Realty Commercial Real Estate Notes, Series 2018-FL1, Class A, 1 mo. USD LIBOR + 1.150%
1.256% FRN 6/15/28  (a)		780,000		780,239
Avant Loans Funding Trust, Series 2019-B, Class A
2.720% 10/15/26 (a)		203,385		203,662
Avery Point IV CLO Ltd., Series 2014-1A, Class AR, 3 mo. USD LIBOR + 1.100%
1.318% FRN 4/25/26  (a)		26,203		26,210
Carlyle Global Market Strategies CLO Ltd., Series 2013-2A, Class AR, 3 mo. USD LIBOR + .890%
1.113% FRN 1/18/29  (a)		1,997,380		1,997,430
CCG Receivables Trust, Series 2018-2, Class A2
3.090% 12/15/25 (a)		157,105		158,161
Citigroup Mortgage Loan Trust, Inc., Series 2006-WFH2, Class M1, 1 mo. USD LIBOR + .405%
0.514% FRN 8/25/36		2,080,793		2,062,847
Crossroads Asset Trust, Series 2021-A, Class A2
0.820% 3/20/24 (a)		690,000		688,973
Elara HGV Timeshare Issuer LLC, Series 2014-A, Class B,
3.020% VRN 2/25/27  (a) (b)		71,804		71,736
FCI Funding  LLC, Series 2019-1A, Class A
3.630% 2/18/31 (a)		112,172		113,828
First Franklin Mortgage Loan Trust
Series 2006-FF15, Class A5, 1 mo. USD LIBOR + .160% 0.269% FRN 11/25/36		923,585		904,551
Series 2005-FF9, Class A4, 1 mo. USD LIBOR + .720% 0.829% FRN 10/25/35		978,787		973,579
FNA VI LLC, Series 2021-1A, Class A
1.350% 1/10/32 (a)		4,459,109		4,451,788
JP Morgan Mortgage Acquisition Trust, Series 2007-CH3, Class A5, 1 mo. USD LIBOR + .260%
0.369% FRN 3/25/37		346,834		341,041
KREF Ltd.
Series 2018-FL1, Class A, 1 mo. USD LIBOR + 1.100% 1.208% FRN 6/15/36  (a)		3,957,991		3,957,963
Series 2018-FL1, Class AS, 1 mo. USD LIBOR + 1.350% 1.458% FRN 6/15/36  (a)		2,000,000		1,998,743
Series 2018-FL1, Class D, 1 mo. USD LIBOR + 2.550% 2.658% FRN 6/15/36  (a)		2,450,000		2,431,636
LCM Ltd., Series 19A, Class AR, 3 mo. USD LIBOR + 1.240%
1.481% FRN 7/15/27  (a)		1,078,257		1,078,431
Lendmark Funding Trust
Series 2019-2A, Class A, 2.780% 4/20/28  (a)		6,600,000		6,779,513
Series 2018-1A, Class A, 3.810% 12/21/26  (a)		630,000		641,572
Series 2018-2A, Class A, 4.230% 4/20/27  (a)		1,000,000		1,021,486
Long Beach Mortgage Loan Trust
Series 2004-5, Class A1, 1 mo. USD LIBOR + .320% 0.429% FRN 9/25/34		1,372,985		1,370,097
Series 2006-WL1, Class 2A4, 1 mo. USD LIBOR + .680% 0.789% FRN 1/25/46		485,140		479,781
Marlette Funding Trust
Series 2020-1A, Class B, 2.380% 3/15/30  (a)		3,200,000		3,243,700
Series 2019-4A, Class A, 2.390% 12/17/29  (a)		2,180,033		2,196,679
Series 2019-3A, Class A, 2.690% 9/17/29  (a)		1,090,907		1,097,075
Series 2019-2A, Class A, 3.130% 7/16/29  (a)		1,643,565		1,656,361
Series 2019-1A, Class A, 3.440% 4/16/29  (a)		2,034,377		2,046,601
Series 2019-2A, Class B, 3.530% 7/16/29  (a)		1,985,000		2,025,820
Series 2018-3A, Class B, 3.860% 9/15/28  (a)		62,952		63,029
MVW Owner Trust, Series 2017-1A, Class A
2.420% 12/20/34 (a)		59,593		61,486
Neuberger Berman CLO XX Ltd., Series 2015-20A, Class AR, 3 mo. USD LIBOR + .800%
1.041% FRN 1/15/28  (a)		2,083,470		2,083,561
New Residential Advance Receivables Trust Advance Receivables Backed, Series 2020-T1, Class AT1
1.426% 8/15/53 (a)		2,250,000		2,253,090
NP SPE II LLC, Series 2019-1A, Class A1
2.574% 9/20/49 (a)		313,333		321,615
NRZ Advance Receivables Trust, Series 2020-T3, Class CT3
1.814% 10/15/52 (a)		894,000		893,999
OCP CLO Ltd., Series 2015-10A, Class A1R, 3 mo. USD LIBOR + .820%
1.035% FRN 10/26/27  (a)		1,034,495		1,034,576
Orange Lake Timeshare Trust, Series 2016-A, Class A
2.610% 3/08/29 (a)		141,594		142,949
PFS Financing Corp., Series 2019-B, Class B, 1 mo. USD LIBOR + .800%
0.906% FRN 9/15/23  (a)		900,000		900,665
Planet Fitness Master Issuer LLC, Series 2018-1A, Class A2I
4.262% 9/05/48 (a)		2,340,000		2,378,514
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850%
2.959% FRN 2/25/23  (a)		440,000		439,474
RAMP Trust, Series 2005-EFC5, Class M2, ABS, FRN, 1 mo. USD LIBOR + .440%
0.769% FRN 10/25/35		1,360,953		1,358,096
Saxon Asset Securities Trust, Series 2006-2, Class A3C, 1 mo. USD LIBOR + .150%
0.259% FRN 9/25/36		278,026		277,869

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

		Principal Amount		Value
Sierra Receivables Funding LLC
Series 2019-3A, Class C, 3.000% 8/20/36  (a)	$	1,817,079	$	1,842,801
Series 2019-1A, Class C, 3.770% 1/20/36  (a)		397,849		408,171
Series 2019-3A, Class D, 4.180% 8/20/36  (a)		465,275		468,157
Series 2019-1A, Class D, 4.750% 1/20/36  (a)		359,959		371,109
SoFi Consumer Loan Program LLC
Series 2017-4, Class A, 2.500% 5/26/26  (a)		14,589		14,608
Series 2017-6, Class A2, 2.820% 11/25/26  (a)		24,105		24,142
Series 2016-1A, Class A, 3.260% 8/25/25  (a)		135,082		135,302
Series 2016-2A, Class B, 4.770% VRN 10/27/25  (a) (b)		1,001,041		1,003,789
Structured Asset Investment Loan Trust, Series 2005-2, Class M2, 1 mo. USD LIBOR + .735%
0.844% FRN 3/25/35		1,723,325		1,715,332
Structured Asset Securities Corp. Mortgage Loan Trust
Series 2006-BC6, Class A4, 1 mo. USD LIBOR + .170% 0.279% FRN 1/25/37		485,245		475,216
Series 2006-WF1, Class M4, 1 mo. USD LIBOR + .645% 0.754% FRN 2/25/36		510,000		501,913
Series 2006-GEL1, Class M2, 1 mo. USD LIBOR + 1.200% 0.909% FRN 11/25/35  (a)		948,828		919,188
TLF National Tax Lien Trust, Series 2017-1A, Class A
3.090% 12/15/29 (a)		37,805		38,044
Trip Rail Master Funding LLC, Series 2017-1A, Class A1
2.709% 8/15/47 (a)		37,881		37,905
Upstart Securitization Trust, Series 2020-3, Class A
1.702% 11/20/30 (a)		3,052,799		3,077,136
Verizon Owner Trust., Series 2018-1A, Class A1A
2.820% 9/20/22 (a)		122,554		122,758
Westgate Resorts LLC
Series 2017-1A, Class A, 3.050% 12/20/30  (a)		164,343		165,880
Series 2018-1A, Class A, 3.380% 12/20/31  (a)		276,360		280,273
				85,693,931
Student Loans Asset-Backed Securities — 8.8%
Brazos Higher Education Authority, Inc.
Series 2006-2, Class A10, 3 mo. USD LIBOR + .120% 0.321% FRN 6/25/26		890,634		888,971
Series 2006-2, Class B2, 1.603% 6/25/42		1,200,000		1,178,348
Chase Education Loan Trust, Series 2007-A, Class A4, 3 mo. USD LIBOR + .100%
0.351% FRN 3/28/68		2,542,434		2,492,262
College Loan Corp. Trust I, Series 2005-2, Class B, 3 mo. USD LIBOR + .490%
0.731% FRN 1/15/37		388,390		347,998
Commonbond Student Loan Trust
Series 2021-AGS, Class B, 1.400% 3/25/52  (a)		503,000		502,744
Series 2018-CGS, Class C, 4.350% 2/25/46  (a)		28,910		28,256
DRB Prime Student Loan Trust
Series 2017-A, Class A1, 1 mo. USD LIBOR + .850% 0.959% FRN 5/27/42  (a)		817,205		817,580
Series 2016-A, Class A1, 1 mo. USD LIBOR + 2.000% 2.109% FRN 4/25/40  (a)		110,500		109,502
Earnest Student Loan Program LLC, Series 2016-B, Class A1, 1 mo. USD LIBOR + 2.050%
2.159% FRN 2/26/35  (a)		100,104		95,048
EdLinc Student Loan Funding Trust, Series 2017-A, Class A, PRIME - 1.150%
2.100% FRN 12/01/47  (a)		524,298		517,748
Edsouth Indenture
No.9 LLC, Series 2015-1, Class A, 1 mo. USD LIBOR + .800% 0.909% FRN 10/25/56  (a)		327,397		324,790
No.10 LLC, Series 2015-2, Class B, 1 mo. USD LIBOR + 1.500% 1.609% FRN 12/25/58  (a)		1,000,000		996,335
ELFI Graduate Loan Program LLC, Series 2018-A, Class A1, 1 mo. USD LIBOR + .750%
0.868% FRN 8/25/42  (a)		341,060		338,734
Goal Capital Funding Trust, Series 2010-1, Class A, 3 mo. USD LIBOR + .700%
0.888% FRN 8/25/48  (a)		224,469		225,420
JP Morgan Student Loan Trust, Series 2007-A, Class B, 3 mo. USD LIBOR + .350%
0.569% FRN 6/28/39  (a)		438,102		406,568
KeyCorp Student Loan Trust, Series 2005-A, Class 2B, 3 mo. USD LIBOR + .730%
0.981% FRN 9/27/38		1,181,367		1,182,250
Laurel Road Prime Student Loan Trust, Series 2019-A, Class A1FX
2.340% 10/25/48 (a)		384,144		374,989
Navient Student Loan Trust
Series 2017-3A, Class A2, 1 mo. USD LIBOR + .600% 0.709% FRN 7/26/66  (a)		618,757		619,982
Series 2017-1A, Class A3, 1 mo. USD LIBOR + 1.150% 1.259% FRN 7/26/66  (a)		410,000		419,597
Series 2015-AA, Class A2B, 1 mo. USD LIBOR + 1.200% 1.306% FRN 12/15/28  (a)		274,704		275,157
Series 2019-3A, Class B, 1 mo. USD LIBOR + 1.550% 1.659% FRN 7/25/68  (a)		2,900,000		2,902,885
Nelnet Private Education Loan Trust, Series 2016-A, Class A1A, 1 mo. USD LIBOR + 1.750%
1.859% FRN 12/26/40  (a)		181,929		182,680
Nelnet Student Loan Trust
Series 2005-2, Class B, 3 mo. USD LIBOR + .170% 0.357% FRN 3/23/37		854,830		729,101
Series 2006-2, Class B, 3 mo. USD LIBOR + .200% 0.418% FRN 1/25/38		616,300		536,579
Series 2006-3, Class B, 3 mo. USD LIBOR + .250% 0.451% FRN 6/25/41		286,155		253,523
Series 2004-3, Class B, 3 mo. USD LIBOR + .350% 0.568% FRN 10/25/40		970,195		880,853
Series 2014-2A, Class B, 1 mo. USD LIBOR + 1.500% 1.609% FRN 6/25/41  (a)		375,000		373,633
SLC Student Loan Trust
Series 2006-2, Class B, 3 mo. USD LIBOR + .230% 0.414% FRN 12/15/39		1,078,850		962,203
Series 2005-2, Class B, 3 mo. USD LIBOR + .280% 0.464% FRN 3/15/40		1,630,699		1,479,458

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

	Principal Amount		Value
SLM Student Loan Trust
Series 2005-5, Class A4, 3 mo. USD LIBOR + .140% 0.358% FRN 10/25/28	$	289,443	$	287,898
Series 2006-4, Class B, 3 mo. USD LIBOR + .200% 0.418% FRN 1/25/70		321,627		294,219
Series 2006-5, Class B, 3 mo. USD LIBOR + .210% 0.428% FRN 10/25/40		340,287		314,082
Series 2006-2, Class B, 3 mo. USD LIBOR + .220% 0.438% FRN 1/25/41		377,329		341,842
Series 2003-14, Class A6, 3 mo. USD LIBOR + .300% 0.518% FRN 7/25/25		189,988		188,990
Series 2005-8, Class B, 3 mo. USD LIBOR + .310% 0.528% FRN 1/25/55		339,860		318,017
Series 2004-8, Class B, 3 mo. USD LIBOR + .460% 0.678% FRN 1/25/40		374,993		350,794
Series 2004-3, Class B, 3 mo. USD LIBOR + .470% 0.688% FRN 10/25/64		259,105		245,342
Series 2003-11, Class B, 3 mo. USD LIBOR + .650% 0.834% FRN 12/15/38		379,993		348,727
SMB Private Education Loan Trust
Series 2018-B, Class A2B, 1 mo. USD LIBOR + .720% 0.826% FRN 1/15/37  (a)		1,169,542		1,168,081
Series 2019-A, Class A2B, 1 mo. USD LIBOR + .870% 0.976% FRN 7/15/36  (a)		1,461,606		1,471,599
Series 2014-A, Class A2B, 1 mo. USD LIBOR + 1.150% 1.256% FRN 5/15/26  (a)		342,714		343,094
Series 2014-A, Class A2A, 3.050% 5/15/26  (a)		76,920		77,393
SoFi Alternative Trust, Series 2019-C, Class PT,
2.322% VRN 1/25/45  (a) (b)		1,234,968		1,313,475
SoFi Professional Loan Program LLC
Series 2017-A, Class A1, 1 mo. USD LIBOR + .700% 0.809% FRN 3/26/40  (a)		180,179		180,009
Series 2016-A, Class A1, 1 mo. USD LIBOR + 1.750% 1.859% FRN 8/25/36  (a)		181,946		183,129
Series 2019-C, Class A1FX, 2.130% 11/16/48  (a)		437,399		438,720
Series 2016-B, Class A2B, 2.740% 10/25/32  (a)		1,386,804		1,403,499
				29,712,104
Whole Loan Collateral Collateralized Mortgage Obligations — 6.0%
Angel Oak Mortgage Trust, Series 2018-3, Class A3,
3.238% VRN 5/25/59  (a) (b)		826,574		834,798
Banc of America Funding, Series 2006-G, Class 2A1, 1 mo. USD LIBOR + .440%
0.551% FRN 7/20/36		736,110		731,287
BRAVO Residential Funding Trust, Series 2019-NQM1, Class A1,
2.666% VRN 7/25/59  (a) (b)		4,968,256		5,062,235
CIM Trust, Series 2019-INV3, Class A11, 1 mo. USD LIBOR + 1.000%
1.068% FRN 8/25/49  (a)		2,233,813		2,237,990
Citigroup Mortgage Loan Trust, Series 2019-IMC1, Class A3,
3.030% VRN 7/25/49  (a) (b)		751,706		763,738
HomeBanc Mortgage Trust, Series 2005-3, Class A1, 1 mo. USD LIBOR + .480%
0.589% FRN 7/25/35		949,678		946,222
JP Morgan Mortgage Trust
Series 2018-1, Class A5, 3.500% VRN 6/25/48  (a) (b)		27,707		27,744
Series 2018-3, Class A5, 3.500% VRN 9/25/48  (a) (b)		129,394		130,226
Series 2017-6, Class A5, 3.500% VRN 12/25/48  (a) (b)		48,252		48,343
Onslow Bay Financial LLC, Series 2020-EXP1, Class 2A2, 1 mo. USD LIBOR + .950%
1.059% FRN 2/25/60  (a)		1,291,735		1,293,692
Opteum Mortgage Acceptance Corp. Asset Backed Pass-Through Certificates, Series 2005-4, Class 1APT, 1 mo. USD LIBOR + .620%
0.729% FRN 11/25/35		1,034,321		1,024,079
Sequoia Mortgage Trust
Series 2018-3, Class A4, 3.500% VRN 3/25/48  (a) (b)		60,898		61,038
Series 2018-CH1, Class A10, 4.000% VRN 2/25/48  (a) (b)		70,145		70,350
Series 2018-CH2, Class A12, 4.000% VRN 6/25/48  (a) (b)		172,125		172,690
Series 2018-CH3, Class A11, 4.000% VRN 8/25/48  (a) (b)		15,829		15,836
STAR Trust, Series 2021-1, Class A3,
1.528% VRN 5/25/65  (a) (b)		5,040,000		5,041,674
Starwood Mortgage Residential Trust, Series 2019-INV1, Class A3,
2.916% VRN 9/27/49  (a) (b)		919,707		936,326
Verus Securitization Trust, Series 2019-INV2, Class A3,
3.219% VRN 7/25/59  (a) (b)		894,965		913,066
				20,311,334
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $181,315,107)				181,723,635
U.S. Government Agency Obligations and Instrumentalities — 9.0%
Pass-Through Securities — 0.1%
Federal Home Loan Mortgage Corp. Pool #1Q0239, 1 year CMT + 2.212% 2.531% 3/01/37		168,341		177,000
Whole Loans — 8.9%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes
Series 2021-DNA1, Class M1, SOFR30A + .650% 0.667% FRN 1/25/51  (a)		1,453,000		1,452,118
Series 2020-DNA6, Class M1, SOFR30A + .900% 0.917% FRN 12/25/50  (a)		1,514,507		1,515,551

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

	Principal Amount		Value
Series 2018-DNA2, Class M2AS, 1 mo. USD LIBOR + .950% 1.059% FRN 12/25/30  (a)	$	1,500,000	$	1,498,746
Series 2020-DNA5, Class M1, SOFR30A + 1.300% 1.317% FRN 10/25/50  (a)		846,598		847,551
Series 2020-DNA4, Class M1, 1 mo. USD LIBOR + 1.500% 1.609% FRN 8/25/50  (a)		659,791		660,115
Series 2018-DNA3, Class M2A, 1 mo. USD LIBOR + 2.100% 2.209% FRN 9/25/48  (a)		1,505,000		1,510,349
Series 2018-DNA2, Class M2A, 1 mo. USD LIBOR + 2.150% 2.259% FRN 12/25/30  (a)		3,800,000		3,825,202
Series 2020-DNA5, Class M2, SOFR30A + 2.800% 2.817% FRN 10/25/50  (a)		504,000		507,235
Series 2020-DNA3, Class M2, 1 mo. USD LIBOR + 3.000% 3.109% FRN 6/25/50  (a)		906,214		909,259
Federal National Mortgage Association Connecticut Avenue Securities Trust
Series 2019-R05, Class 1M2, 1 mo. USD LIBOR + 2.000% 2.109% FRN 7/25/39  (a)		6,251,277		6,257,223
Series 2019-R03, Class 1M2, 1 mo. USD LIBOR + 2.150% 2.259% FRN 9/25/31  (a)		7,306,275		7,322,615
Series 2019-R02, Class 1M2, 1 mo. USD LIBOR + 2.300% 2.409% FRN 8/25/31  (a)		4,090,317		4,093,007
				30,398,971
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $30,618,056)				30,575,971
U.S. Treasury Obligations — 22.0%
U.S. Treasury Bonds & Notes — 22.0%
U.S. Treasury Inflation Index
0.125% 7/15/24		1,542,100		1,668,239
0.125% 10/15/24		2,548,525		2,755,891
0.125% 4/15/25		607,536		657,527
0.125% 10/15/25		5,241,600		5,707,713
0.125% 7/15/26		2,782,382		3,039,208
0.125% 1/15/30		2,439,768		2,636,522
0.125% 7/15/30		816,088		884,563
0.125% 1/15/31		6,128,853		6,590,193
0.125% 2/15/51		1,004,590		1,004,747
0.250% 1/15/25		2,236,106		2,427,704
0.250% 7/15/29		3,425,342		3,764,798
0.250% 2/15/50		2,161,784		2,242,766
0.375% 7/15/25 (c)		2,889,598		3,182,113
0.375% 1/15/27		2,382,028		2,626,000
0.375% 7/15/27		2,726,460		3,022,483
0.500% 4/15/24		1,244,424		1,348,572
0.500% 1/15/28		1,351,921		1,504,329
0.625% 4/15/23		2,105,920		2,241,406
0.625% 1/15/24		2,578,139		2,794,360
0.625% 1/15/26		1,348,394		1,498,693
0.625% 2/15/43		910,080		1,023,520
0.750% 7/15/28		1,901,559		2,166,366
0.750% 2/15/42		1,099,616		1,265,481
0.750% 2/15/45		1,832,639		2,108,859
0.875% 1/15/29		2,071,640		2,373,039
0.875% 2/15/47		541,745		648,454
1.000% 2/15/48		848,496		1,048,821
1.000% 2/15/49		467,726		581,770
1.375% 2/15/44		1,010,007		1,312,792
2.000% 1/15/26		790,656		934,040
2.125% 2/15/40		363,024		518,493
2.125% 2/15/41		776,308		1,118,445
2.375% 1/15/25		2,011,933		2,356,516
2.500% 1/15/29		730,920		934,250
3.375% 4/15/32		368,375		536,072
3.625% 4/15/28		727,686		979,249
3.875% 4/15/29		2,227,372		3,123,759
				74,627,753
TOTAL U.S. TREASURY OBLIGATIONS (Cost $74,057,656)				74,627,753
TOTAL BONDS & NOTES (Cost $287,045,559)				288,440,645
TOTAL PURCHASED OPTIONS (#) — 0.5% (Cost $1,845,236)				1,816,671
TOTAL LONG-TERM INVESTMENTS (Cost $288,890,795)				290,257,316

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

	Principal Amount		Value
Short-Term Investments — 14.3%
Commercial Paper — 13.9%
Amcor Flexibles North American, Inc.
0.203% 4/29/21 (a)	$	1,000,000	$	999,856
American Electric Power Co., Inc.
0.203% 4/19/21 (a)		2,000,000		1,999,826
AT&T, Inc.
0.346% 9/21/21 (a)		4,000,000		3,994,857
BAT International Finance PLC
0.304% 4/22/21 (a)		4,000,000		3,999,587
Dominion Resources
0.203% 4/12/21		2,000,000		1,999,896
Duke Energy Corp.
0.172% 4/06/21 (a)		3,000,000		2,999,952
E.I. du Point Nemours & Co.
0.233% 5/17/21 (a)		4,000,000		3,998,914
Entergy Corp.
0.193% 4/05/21 (a)		3,000,000		2,999,955
0.254% 4/20/21 (a)		4,000,000		3,999,518
Holcim US Finance SARL & Cie
0.223% 4/23/21 (a)		4,000,000		3,999,563
Intercontinental Exchange, Inc.
0.355% 4/05/21 (a)		1,000,000		999,965
Southern Power Co.
0.193% 4/05/21 (a)		2,000,000		1,999,958
Spire, Inc.
0.193% 4/16/21 (a)		4,000,000		3,999,714
Volkswagen Credit, Inc
0.244% 4/19/21 (a)		4,000,000		3,999,652
Waste Management, Inc.
0.356% 7/01/21 (a)		5,000,000		4,996,703
				46,987,916
Repurchase Agreement — 0.4%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/21, 0.000%, due 4/01/21 (d)		1,358,916		1,358,916
TOTAL SHORT-TERM INVESTMENTS (Cost $48,343,526)				48,346,832
TOTAL INVESTMENTS — 99.9% (Cost $337,234,321) (e)				338,604,148
Other Assets/(Liabilities) — 0.1%				293,011
NET ASSETS — 100.0%			$	338,897,159

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 March 31, 2021, the aggregate market value of these securities amounted to $216,140,015 or 63.78% 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 March 31, 2021.
(c)	A portion of this security is pledged/held as collateral for open derivatives.
(d)	Maturity value of $1,358,916. Collateralized by U.S. Government Agency obligations with a rate of 1.750%, maturity date of 12/31/24, and an aggregate market value, including accrued interest, of $1,386,104.
(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	Quaterly	2.44%	Semi-Annually	USD	1,967,000	$	113,889	$	98,334	$	15,555
Put
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	2.94%	Semi-Annually	3-Month USD LIBOR BBA	Quaterly	USD	22,880,000	$	1,137,365	$	1,143,841	$	(6,476	)
10-Year Interest Rate Swap, 2/02/43	Credit Suisse International	1/31/33	3.11%	Semi-Annually	3-Month USD LIBOR BBA	Quaterly	USD	12,590,000		565,417		603,061		(37,644	)
										1,702,782		1,746,902		(44,120	)
									$	1,816,671	$	1,845,236	$	(28,565	)

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

Futures contracts
	Expiration Date	Number of Contracts	Notional Amount			Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Long Bond	6/21/21	33	$	5,300,218		$	(198,624	)
U.S. Treasury Note 2 Year	6/30/21	74		16,340,887			(7,121	)
U.S. Treasury Note 5 Year	6/30/21	2		247,194			(397	)
						$	(206,142	)
Short
U.S. Treasury Ultra 10 Year	6/21/21	48	$	(6,936,500	)	$	39,500
U.S. Treasury Ultra Bond	6/21/21	11		(2,065,700	)		72,294
						$	111,794

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)
1.978%	Maturity	U.S. Consumer Price Index	Maturity	Bank of America N.A.	12/24/22	USD	2,000,000	$	29,759	$	—	$	29,759
1.833%	Maturity	U.S. Consumer Price Index	Maturity	Goldman Sachs International	8/28/23	USD	500,000		15,245		—		15,245
1.880%	Maturity	U.S. Consumer Price Index	Maturity	Goldman Sachs International	8/28/25	USD	2,000,000		86,149		—		86,149
2.000%	Maturity	U.S. Consumer Price Index	Maturity	JP Morgan Chase Bank N.A.	12/24/23	USD	4,000,000		79,793		—		79,793
2.295%	Maturity	U.S. Consumer Price Index	Maturity	JP Morgan Chase Bank N.A.	1/26/26	USD	10,000,000		152,264		—		152,264
								$	363,210		—	$	363,210

OTC Total Return Swaps 

Paid by the Fund		Received by the Fund
Rate/ Reference	Frequency	Rate/ Reference	Frequency	Counterparty	Termination Date	No. of Contracts/ Notional		Value			Upfront Premium Received (Paid)/ Received		Unrealized Appreciation (Depreciation)
0.24%	Maturity	Bloomberg Barclays US Treasury Inflation Notes TR Index	Maturity	BNP Paribas SA	7/30/21	$43,803,722	$	(786,653	)	$	—	$	(786,653	)
0.24%	Maturity	Bloomberg Barclays US Treasury Inflation Notes TR Index	Maturity	BNP Paribas SA	8/31/21	64,759,039		(121,729	)		—		(121,729	)
0.26%	Maturity	Bloomberg Barclays US Treasury Inflation Notes TR Index	Maturity	Goldman Sachs International	5/28/21	33,123,588		257,278			—		257,278
0.24%	Maturity	Bloomberg Barclays US Treasury Inflation Notes TR Index	Maturity	Goldman Sachs International	7/30/21	55,262,635		(992,439	)		—		(992,439	)
0.24%	Maturity	Bloomberg Barclays US Treasury Inflation Notes TR Index	Maturity	Goldman Sachs International	8/31/21	53,965,865		(101,440	)		—		(101,440	)
							$	(1,744,983	)	$	—	$	(1,744,983	)

Currency Legend

USD           U.S. Dollar

MML Managed Bond Fund —  Portfolio of Investments

March 31, 2021 (Unaudited)

	Principal Amount		Value
Bonds & Notes — 98.2%
Corporate Debt — 38.0%
Aerospace & Defense — 0.7%
BAE Systems PLC
1.900% 2/15/31 (a)	$	595,000	$	555,896
The Boeing Co.
1.433% 2/04/24		5,060,000		5,068,906
Raytheon Technologies Corp.
4.500% 6/01/42		1,000,000		1,189,527
				6,814,329
Agriculture — 0.7%
BAT Capital Corp.
2.259% 3/25/28		725,000		713,259
4.700% 4/02/27		1,050,000		1,181,341
4.758% 9/06/49		540,000		553,235
Imperial Brands Finance PLC
3.875% 7/26/29 (a)		2,764,000		2,937,190
Reynolds American, Inc.
5.850% 8/15/45		985,000		1,158,278
				6,543,303
Airlines — 0.3%
Delta Air Lines, Inc./SkyMiles IP Ltd.
4.500% 10/20/25 (a)		980,000		1,043,560
Spirit Airlines Pass-Through Trust, Series 2015-1, Class A,
4.100% 10/01/29		1,384,317		1,381,686
United Airlines Pass-Through Trust, Series 2018-1, Class B,
4.600% 9/01/27		438,326		443,288
				2,868,534
Auto Manufacturers — 0.7%
Ford Motor Credit Co. LLC
3.087% 1/09/23		1,410,000		1,432,884
4.140% 2/15/23		1,360,000		1,405,424
General Motors Co.
4.200% 10/01/27		565,000		619,732
5.150% 4/01/38		800,000		914,238
6.800% 10/01/27		1,890,000		2,343,462
				6,715,740
Banks — 5.8%
Associated Banc-Corp.
4.250% 1/15/25		2,411,000		2,596,756
Banco Santander SA
2.958% 3/25/31		1,600,000		1,589,485
Bank of America Corp.
SOFR + 2.150% 2.592% VRN 4/29/31		1,255,000		1,250,837
4.183% 11/25/27		1,090,000		1,211,563
3 mo. USD LIBOR + 1.814% 4.244% VRN 4/24/38		1,150,000		1,305,495
3 mo. USD LIBOR + 1.310% 4.271% VRN 7/23/29		475,000		533,744
6.110% 1/29/37		1,550,000		2,049,599
7.750% 5/14/38		400,000		612,842
The Bank of Nova Scotia 3 mo. USD LIBOR + 2.648%
4.650% VRN (b)		3,575,000		3,579,683
Barclays Bank PLC
10.179% 6/12/21 (a)		3,351,000		3,408,541
Barclays PLC
4.337% 1/10/28		920,000		1,020,475
BPCE SA SOFR + 1.520%
1.652% VRN 10/06/26  (a)		3,635,000		3,624,993
Citigroup, Inc.
4.450% 9/29/27		450,000		506,770
6.625% 6/15/32		375,000		496,045
Credit Suisse AG
6.500% 8/08/23 (a)		3,069,000		3,375,133
Discover Bank 5 year USD Swap + 1.730%
4.682% VRN 8/09/28		2,905,000		3,098,473
First Republic Bank
4.375% 8/01/46		3,210,000		3,670,994
Fulton Financial Corp.
3.600% 3/16/22		226,000		232,324
The Goldman Sachs Group, Inc.
4.250% 10/21/25		550,000		613,939
5.950% 1/15/27		1,410,000		1,703,643
6.750% 10/01/37		1,145,000		1,610,698
HSBC Holdings PLC
4.250% 3/14/24		1,225,000		1,331,619
4.250% 8/18/25		2,662,000		2,925,613
ING Groep NV SOFR + .920%
1.726% VRN 4/01/27  (c)		1,153,000		1,151,347
JP Morgan Chase & Co.
5.600% 7/15/41		1,125,000		1,500,394
Mizrahi Tefahot Bank Ltd. 5 year CMT + 2.250%
3.077% VRN 4/07/31  (a) (c)		2,780,000		2,776,525
Morgan Stanley
4.350% 9/08/26		3,200,000		3,617,201
Nordea Bank Abp 5 year CMT + 4.110%
6.625% VRN (a) (b)		2,208,000		2,522,640
Valley National Bancorp
5.125% 9/27/23		1,530,000		1,668,762
Wells Fargo & Co.
5.375% 11/02/43		909,000		1,134,197
				56,720,330

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Beverages — 0.6%
Anheuser-Busch Cos. LLC/Anheuser-Busch InBev Worldwide, Inc.
4.900% 2/01/46	$	3,475,000	$	4,115,862
Bacardi Ltd.
5.150% 5/15/38 (a)		450,000		537,084
Molson Coors Beverage Co.
4.200% 7/15/46		1,124,000		1,167,567
5.000% 5/01/42		360,000		414,204
				6,234,717
Chemicals — 0.9%
DuPont de Nemours, Inc.
5.319% 11/15/38		1,750,000		2,193,638
Nutrition & Biosciences, Inc.
1.832% 10/15/27 (a)		755,000		737,783
Syngenta Finance NV
4.441% 4/24/23 (a)		2,065,000		2,163,302
Yara International ASA
3.148% 6/04/30 (a)		295,000		303,542
4.750% 6/01/28 (a)		3,328,000		3,788,819
				9,187,084
Computers — 0.9%
Apple, Inc.
2.650% 5/11/50		700,000		634,272
Dell International LLC/EMC Corp.
6.020% 6/15/26 (a)		2,702,000		3,197,405
8.100% 7/15/36 (a)		325,000		475,738
Genpact Luxembourg Sarl
3.700% STEP 4/01/22		2,400,000		2,459,841
Leidos, Inc.
2.300% 2/15/31 (a)		1,260,000		1,188,634
4.375% 5/15/30 (a)		575,000		639,193
				8,595,083
Diversified Financial Services — 3.5%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust
4.500% 9/15/23		1,370,000		1,473,520
6.500% 7/15/25		645,000		751,655
Aircastle Ltd.
4.400% 9/25/23		3,095,000		3,296,081
Antares Holdings LP
3.950% 7/15/26 (a)		1,035,000		1,043,315
6.000% 8/15/23 (a)		2,945,000		3,088,504
8.500% 5/18/25 (a)		720,000		840,812
Ares Finance Co. LLC
4.000% 10/08/24 (a)		2,080,000		2,216,410
Aviation Capital Group LLC
1.950% 1/30/26 (a)		1,220,000		1,188,125
Avolon Holdings Funding Ltd.
3.250% 2/15/27 (a)		1,365,000		1,353,124
Brookfield Finance, Inc.
4.350% 4/15/30		2,825,000		3,186,948
4.850% 3/29/29		1,752,000		2,023,407
GE Capital International Funding Co. Unlimited Co.
4.418% 11/15/35		335,000		383,949
Global Aircraft Leasing Co. Ltd.
6.500% 9/15/24 (a)		1,449,648		1,390,212
Lazard Group LLC
3.625% 3/01/27		1,253,000		1,349,772
4.500% 9/19/28		755,000		851,219
LeasePlan Corp. NV
2.875% 10/24/24 (a)		1,535,000		1,613,723
Legg Mason, Inc.
5.625% 1/15/44		1,195,000		1,557,039
Park Aerospace Holdings Ltd.
4.500% 3/15/23 (a)		1,550,000		1,618,742
5.250% 8/15/22 (a)		5,055,000		5,306,704
				34,533,261

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Electric — 1.4%
Appalachian Power Co.
4.500%  3/01/49	$	1,250,000	$	1,418,099
CMS Energy Corp.
4.875%  3/01/44		780,000		922,205
Entergy Arkansas LLC
2.650%  6/15/51		1,765,000		1,555,907
Entergy Louisiana LLC
4.950%  1/15/45		1,005,000		1,089,409
FirstEnergy Transmission LLC
4.550%  4/01/49  (a)		880,000		925,435
Infraestructura Energetica Nova SAB de CV
3.750%  1/14/28  (a)		820,000		870,225
ITC Holdings Corp.
2.950%  5/14/30  (a)		895,000		911,666
Nevada Power Co.
6.650%  4/01/36		550,000		770,989
Oncor Electric Delivery Co.
7.500%  9/01/38		495,000		757,522
Pacific Gas and Electric Co.
2.500%  2/01/31		775,000		731,313
Potomac Electric Power Co.
4.150%  3/15/43		700,000		788,669
Tampa Electric Co.
2.400%  3/15/31		1,320,000		1,310,504
Xcel Energy, Inc.
6.500%  7/01/36		1,250,000		1,766,034
				13,817,977
Food — 0.3%
Flowers Foods, Inc.
2.400%  3/15/31		690,000		672,550
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc.
5.500%  1/15/30  (a)		776,000		858,834
Smithfield Foods, Inc.
3.000%  10/15/30  (a)		943,000		937,804
				2,469,188
Gas — 0.6%
CenterPoint Energy Resources Corp.
6.625%  11/01/37		1,250,000		1,655,526
NiSource, Inc.
4.800% 2/15/44		1,035,000		1,206,728
5.800% 2/01/42		950,000		1,193,801
Piedmont Natural Gas Co., Inc.
2.500%  3/15/31		1,915,000		1,893,530
				5,949,585
Health Care – Services — 0.1%
City of Hope
4.378% 8/15/48		1,050,000		1,227,034
Insurance — 5.0%
Allstate Corp. 3 mo. USD LIBOR + 2.938%
5.750% VRN 8/15/53		4,260,000		4,504,950
American International Group, Inc.
4.500% 7/16/44		725,000		818,750
3 mo. USD LIBOR + 2.868% 5.750% VRN 4/01/48		3,087,000		3,442,005
AmTrust Financial Services, Inc.
6.125% 8/15/23		3,370,000		3,371,826
Arch Capital Group US, Inc.
5.144% 11/01/43		540,000		661,234
Athene Global Funding
2.500% 1/14/25 (a)		1,390,000		1,439,371
Athene Holding Ltd.
6.150% 4/03/30		3,300,000		4,020,252
AXIS Specialty Finance LLC
3.900% 7/15/29		1,110,000		1,192,077
5 year CMT + 3.186% 4.900% VRN 1/15/40		1,315,000		1,347,875
AXIS Specialty Finance PLC
4.000% 12/06/27		2,500,000		2,798,706
Brighthouse Financial, Inc.
3.700% 6/22/27		785,000		830,048
4.700% 6/22/47		1,125,000		1,151,418
5.625% 5/15/30		2,492,000		2,912,987
CNO Financial Group, Inc.
5.250% 5/30/29		2,094,000		2,411,759

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Enstar Group Ltd.
4.950% 6/01/29	$	1,600,000	$	1,787,282
Markel Corp. 5 year CMT + 5.662%
6.000% VRN (b)		930,000		1,011,375
MetLife Capital Trust IV
7.875% 12/15/67 (a)		725,000		1,007,569
New York Life Insurance Co.
3.750% 5/15/50 (a)		510,000		535,272
Prudential Financial, Inc.
5 year CMT + 3.035% 3.700% VRN 10/01/50		460,000		465,152
3 mo. USD LIBOR + 3.920% 5.625% VRN 6/15/43		1,025,000		1,098,213
3 mo. USD LIBOR + 2.665% 5.700% VRN 9/15/48		2,440,000		2,786,594
3 mo. USD LIBOR + 4.175% 5.875% VRN 9/15/42		550,000		580,712
Reinsurance Group of America, Inc.
3.150% 6/15/30		1,160,000		1,199,012
RenaissanceRe Finance, Inc.
3.450% 7/01/27		1,860,000		2,008,059
Teachers Insurance & Annuity Association of America
4.270% 5/15/47 (a)		750,000		840,650
USF&G Capital I
8.500% 12/15/45 (a)		885,000		1,287,673
Voya Financial, Inc. 3 mo. USD LIBOR + 2.084%
4.700% VRN 1/23/48		1,080,000		1,101,600
Willis North America, Inc.
2.950% 9/15/29		905,000		933,905
XLIT Ltd.
4.450% 3/31/25		1,439,000		1,602,280
				49,148,606
Internet — 0.1%
Amazon.com, Inc.
4.050% 8/22/47		775,000		898,086
Investment Companies — 1.5%
Ares Capital Corp.
2.150% 7/15/26		1,850,000		1,799,004
4.200% 6/10/24		1,450,000		1,563,302
BlackRock TCP Capital Corp.
3.900% 8/23/24		2,910,000		3,085,432
4.125% 8/11/22		2,870,000		2,968,063
Golub Capital BDC, Inc.
2.500% 8/24/26		880,000		860,488
Sixth Street Specialty Lending, Inc.
2.500% 8/01/26		885,000		877,251
3.875% 11/01/24		3,575,000		3,750,820
				14,904,360
Iron & Steel — 0.2%
Vale Overseas Ltd.
6.250% 8/10/26		1,250,000		1,486,875
6.875% 11/21/36		630,000		837,311
				2,324,186
Lodging — 0.1%
Marriott International, Inc. /MD
2.850% 4/15/31		1,115,000		1,095,682
Machinery – Diversified — 0.2%
CNH Industrial Capital LLC
3.875% 10/15/21		2,280,000		2,318,590
Media — 1.2%
Charter Communications Operating LLC/Charter Communications Operating Capital
3.900% 6/01/52		765,000		732,575
6.484% 10/23/45		735,000		954,713
Comcast Corp.
3.450% 2/01/50		940,000		966,759
3.969% 11/01/47		630,000		702,882
4.750% 3/01/44		880,000		1,078,744
6.950% 8/15/37		265,000		393,722
Discovery Communications LLC
4.000% 9/15/55 (a)		1,210,000		1,187,194
4.650% 5/15/50		490,000		538,786
Time Warner Cable, Inc.
6.750% 6/15/39		985,000		1,317,032
ViacomCBS, Inc.
4.200% 5/19/32		872,000		977,436
4.950% 1/15/31		1,008,000		1,191,509
The Walt Disney Co.
3.600% 1/13/51		1,515,000		1,598,494
				11,639,846

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Metal Fabricate & Hardware — 0.2%
The Timken Co.
4.500% 12/15/28	$	2,055,000	$	2,203,395
Mining — 0.5%
Glencore Finance Canada Ltd.
5.550% STEP 10/25/42  (a)		894,000		1,087,827
Glencore Funding LLC
3.875% 10/27/27 (a)		975,000		1,069,575
4.625% 4/29/24 (a)		1,565,000		1,722,902
Teck Resources Ltd.
6.000% 8/15/40		850,000		1,018,470
				4,898,774
Miscellaneous - Manufacturing — 0.1%
General Electric Co.
4.125% 10/09/42		113,000		121,241
6.875% 1/10/39		298,000		417,955
				539,196
Oil & Gas — 2.6%
BP Capital Markets PLC 5 year CMT + 4.036%
4.375% VRN (b)		2,900,000		3,067,620
Cenovus Energy, Inc.
4.250% 4/15/27		1,125,000		1,216,099
6.750% 11/15/39		765,000		952,263
Devon Energy Corp.
5.600% 7/15/41		800,000		920,938
5.850% 12/15/25		1,510,000		1,759,360
EQT Corp.
3.900% 10/01/27		4,510,000		4,604,372
Marathon Petroleum Corp.
4.500% 4/01/48		510,000		538,390
6.500% 3/01/41		1,120,000		1,485,826
Occidental Petroleum Corp.
6.600% 3/15/46		1,258,000		1,336,625
Ovintiv Exploration, Inc.
5.375% 1/01/26		1,650,000		1,811,293
5.625% 7/01/24		975,000		1,071,757
5.750% 1/30/22		904,000		933,605
Ovintiv, Inc.
6.500% 2/01/38		545,000		658,977
Patterson-UTI Energy, Inc.
3.950% 2/01/28		1,680,000		1,574,524
Petroleos Mexicanos
5.350% 2/12/28		665,000		646,646
6.375% 1/23/45		595,000		493,850
6.500% 3/13/27		585,000		611,325
6.625% 6/15/35		140,000		133,000
Saudi Arabian Oil Co.
4.250% 4/16/39 (a)		2,075,000		2,233,492
				26,049,962
Oil & Gas Services — 0.4%
Halliburton Co.
5.000% 11/15/45		1,000,000		1,111,523
NOV, Inc.
3.600% 12/01/29		1,570,000		1,577,926
3.950% 12/01/42		1,506,000		1,372,419
				4,061,868
Pharmaceuticals — 1.3%
AbbVie, Inc.
4.050% 11/21/39		1,045,000		1,166,587
4.700% 5/14/45		1,260,000		1,494,772
Bristol-Myers Squibb Co.
4.350% 11/15/47		830,000		982,670
Cigna Corp.
4.800% 7/15/46		880,000		1,051,867
CVS Health Corp.
4.300% 3/25/28		240,000		272,472
5.050% 3/25/48		455,000		556,823
6.125% 9/15/39		560,000		728,543
CVS Pass-Through Trust
5.926% 1/10/34 (a)		1,022,694		1,178,339
7.507% 1/10/32 (a)		869,478		1,087,566
McKesson Corp.
6.000% 3/01/41		550,000		711,070
Takeda Pharmaceutical Co. Ltd.
3.375% 7/09/60		970,000		927,705
Utah Acquisition Sub, Inc.
5.250% 6/15/46		1,375,000		1,613,264
Viatris, Inc.
2.700% 6/22/30 (a)		1,235,000		1,220,759
				12,992,437

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pipelines — 2.1%
Energy Transfer Operating LP
4.200% 4/15/27	$	1,085,000	$	1,181,831
6.125% 12/15/45		1,000,000		1,141,819
3 mo. USD LIBOR + 4.028% 6.250% VRN (b)		2,370,000		1,932,024
EnLink Midstream Partners LP
4.150% 6/01/25		2,924,000		2,858,824
4.850% 7/15/26		951,000		918,695
Enterprise Products Operating LLC
3 mo. USD LIBOR + 3.033% 5.250% VRN 8/16/77		1,775,000		1,769,212
3 mo. USD LIBOR + 2.570% 5.375% VRN 2/15/78		1,205,000		1,207,210
EQM Midstream Partners LP
4.750% 7/15/23		2,325,000		2,412,188
MPLX LP
4.500% 4/15/38		595,000		647,406
3 mo. USD LIBOR + 4.652% 6.875% VRN (b)		1,775,000		1,775,000
Plains All American Pipeline LP 3 mo. USD LIBOR + 4.110%
6.125% VRN (b)		2,345,000		1,905,453
Plains All American Pipeline LP/PAA Finance Corp.
3.800% 9/15/30		1,150,000		1,170,383
4.700% 6/15/44		1,195,000		1,136,345
6.650% 1/15/37		375,000		437,866
Sunoco Logistics Partners Operations LP
5.300% 4/01/44		525,000		551,268
				21,045,524
Private Equity — 0.6%
Apollo Management Holdings LP 5 year CMT + 3.266%
4.950% VRN 1/14/50  (a)		1,505,000		1,550,150
Carlyle Finance Subsidiary LLC
3.500% 9/19/29 (a)		1,100,000		1,148,551
Hercules Capital, Inc.
4.625% 10/23/22		2,910,000		2,962,434
KKR Group Finance Co. VIII LLC
3.500% 8/25/50 (a)		710,000		700,783
				6,361,918
Real Estate Investment Trusts (REITS) — 2.5%
Agree LP
2.900% 10/01/30		470,000		473,034
American Tower Trust #1
3.652% 3/15/48 (a)		1,910,000		2,067,466
Highwoods Realty LP
4.125% 3/15/28		475,000		513,682
Host Hotels & Resorts LP
3.500% 9/15/30		2,120,000		2,121,143
Kimco Realty Corp.
4.125% 12/01/46		710,000		749,796
4.450% 9/01/47		800,000		885,131
SBA Tower Trust
1.884% 7/15/50 (a)		1,441,000		1,457,881
Service Properties Trust
4.500% 6/15/23		760,000		772,054
4.950% 10/01/29		1,155,000		1,100,138
Spirit Realty LP
2.700% 2/15/32		550,000		522,121
3.200% 1/15/27		2,280,000		2,379,834
3.400% 1/15/30		515,000		533,753
4.000% 7/15/29		1,290,000		1,396,416
4.450% 9/15/26		133,000		147,469
STORE Capital Corp.
2.750% 11/18/30		370,000		361,982
4.625% 3/15/29		1,881,000		2,091,990
Tanger Properties LP
3.875% 12/01/23		1,448,000		1,518,069
VEREIT Operating Partnership LP
2.850% 12/15/32		95,000		91,922
3.100% 12/15/29		2,790,000		2,848,085
3.400% 1/15/28		365,000		384,625
WEA Finance LLC
2.875% 1/15/27 (a)		1,345,000		1,336,254
WP Carey, Inc.
4.250% 10/01/26		757,000		849,622
				24,602,467
Retail — 0.5%
El Puerto de Liverpool SAB de CV
3.950% 10/02/24 (a)		2,620,000		2,804,081
Starbucks Corp.
2.550% 11/15/30		1,595,000		1,596,983
				4,401,064
Semiconductors — 0.3%
Broadcom, Inc.
2.450% 2/15/31 (a)		2,585,000		2,442,638
Software — 0.3%
Broadridge Financial Solutions, Inc.
2.900% 12/01/29		1,210,000		1,237,412
Microsoft Corp.
2.921% 3/17/52		2,064,000		2,012,599
				3,250,011
Telecommunications — 1.6%
AT&T, Inc.
1.650% 2/01/28		680,000		657,553
3.500% 9/15/53 (a)		1,578,000		1,451,282
3.550% 9/15/55 (a)		5,153,000		4,705,591
Crown Castle Towers LLC
3.222% 5/15/42 (a)		1,700,000		1,710,128
4.241% 7/15/48 (a)		2,750,000		3,062,724
Qwest Corp
6.750% 12/01/21		725,000		749,469
Telefonica Emisiones SAU
4.665% 3/06/38		1,105,000		1,249,497
Verizon Communications, Inc.
2.550% 3/21/31		760,000		757,973
2.875% 11/20/50		755,000		668,796
2.987% 10/30/56 (a)		1,257,000		1,105,589
				16,118,602

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Transportation — 0.2%
Canadian Pacific Railway Co.
2.050%  3/05/30	$	648,000	$	625,569
CSX Corp.
4.750%  11/15/48		650,000		779,074
Norfolk Southern Corp.
4.050%  8/15/52		860,000		938,061
				2,342,704
TOTAL CORPORATE DEBT  (Cost $359,475,178)				375,316,081
Municipal Obligations — 0.2%
JobsOhio Beverage System Series B, Revenue Bonds
4.532%  1/01/35		1,950,000		2,353,962
TOTAL MUNICIPAL OBLIGATIONS (Cost $2,074,878)				2,353,962
Non-U.S. Government Agency Obligations — 32.9%
Automobile Asset-Backed Securities — 1.7%
Avis Budget Rental Car Funding AESOP LLC, Series 2019-1A, Class C
4.530%  3/20/23  (a)		1,271,000		1,300,507
CarMax Auto Owner Trust
Series 2020-4, Class D, 1.750% 4/15/27		3,900,000		3,925,251
Series 2019-3, Class D, 2.850% 1/15/26		1,974,000		2,055,779
Carvana Auto Receivables Trust
Series 2021-P1, Class D, 1.820% 12/10/27		1,749,000		1,735,489
Series 2019-4A, Class D, 3.070% 7/15/25  (a)		1,625,000		1,687,155
OneMain Direct Auto Receivables Trust, Series 2019-1A, Class B
3.950%  11/14/28  (a)		1,774,000		1,890,353
Santander Revolving Auto Loan Trust, Series 2019-A, Class D
3.450%  1/26/32  (a)		1,087,000		1,118,973
Westlake Automobile Receivables Trust, Series 2021-1A, Class E
2.330%  8/17/26  (a)		3,226,000		3,216,592
				16,930,099
Commercial Mortgage-Backed Securities — 6.8%
Aventura Mall Trust, Series 2018-AVM, Class C,
4.112% VRN 7/05/40  (a) (d)		4,270,000		4,437,550
BAMLL Commercial Mortgage Securities Trust, Series 2018-DSNY, Class C, 1 mo. USD LIBOR + 1.350%
1.456% FRN 9/15/34  (a)		670,000		665,028
BANK
Series 2020-BN30, Class MCDF, 2.918% VRN 12/15/53  (d)		2,100,000		1,912,999
Series 2019-BN17, Class B, 4.128% VRN 4/15/52  (d)		441,000		493,389
Series 2019-BN16, Class AS, 4.267% 2/15/52		665,833		750,951
Series 2019-BN16, Class B, 4.438% VRN 2/15/52  (d)		547,420		622,049
BBCMS Mortgage Trust
Series 2018-CHRS, Class B, 4.267% VRN 8/05/38  (a) (d)		2,250,000		2,383,650
Series 2018-CHRS, Class C, 4.267% VRN 8/05/38  (a) (d)		1,610,000		1,628,093
Series 2018-CHRS, Class D, 4.267% VRN 8/05/38  (a) (d)		1,370,000		1,322,931
Bear Stearns Commercial Mortgage Securities, Series 2007-T26, Class AM,
5.432% VRN 1/12/45  (d)		359,516		355,830
Benchmark Mortgage Trust
Series 2021-B23, Class AS, 2.274% 2/15/54		1,960,000		1,886,434
Series 2021-B23, Class 360A, 2.759% VRN 2/15/54  (a) (d)		2,200,000		2,159,827
Series 2021-B23, Class 360B, 2.759% VRN 2/15/54  (a) (d)		3,587,000		3,423,983
BHMS Mortgage Trust, Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500%
1.606% FRN 7/15/35  (a)		2,760,000		2,742,762
BX Commercial Mortgage Trust
Series 2020-BXLP, Class E, 1 mo. USD LIBOR + 1.600% 1.706% FRN 12/15/36  (a)		4,108,672		4,103,541
Series 2018-IND, Class E, 1 mo. USD LIBOR + 1.700% 1.806% FRN 11/15/35  (a)		1,876,000		1,875,999
Series 2019-XL, Class E, 1 mo. USD LIBOR + 1.800% 1.906% FRN 10/15/36  (a)		1,626,144		1,625,127
Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000% 2.106% FRN 10/15/36  (a)		1,963,787		1,961,949
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class D, 1 mo. USD LIBOR + 1.750%
1.856% FRN 12/15/37  (a)		898,516		898,794
Century Plaza Towers
Series 2019-CPT, Class D, 2.997% VRN 11/13/39  (a) (d)		982,000		966,810
Series 2019-CPT, Class E, 2.997% VRN 11/13/39  (a) (d)		1,556,000		1,465,128
Cold Storage Trust, Series 2020-ICE5, Class D, 1 mo. USD LIBOR + 2.100%
2.206% FRN 11/15/37  (a)		3,440,467		3,444,762
Commercial Mortgage Pass-Through Certificates
Series 2020-CX, Class B, 2.446% 11/10/46  (a)		1,056,000		1,037,125
Series 2012-CR4, Class B, 3.703% 10/15/45  (a)		1,060,000		967,787
Series 2014-UBS2, Class AM, 4.199% 3/10/47		1,375,000		1,477,920
Series 2015-CR23, Class C, 4.293% VRN 5/10/48  (d)		1,000,000		1,064,460
Series 2014-LC17, Class C, 4.553% VRN 10/10/47  (d)		2,908,000		3,065,226
Credit Suisse Mortgage Capital Certificates, Series 2019-ICE4, Class E, 1 mo. USD LIBOR + 2.150%
2.256% FRN 5/15/36  (a)		570,000		570,357
Jackson Park Trust, Series 2019-LIC, Class C,
3.131% VRN 10/14/39  (a) (d)		2,300,000		2,264,864
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800%
1.906% FRN 5/15/36  (a)		1,505,000		1,504,531
Life 2021-BMR Mortgage Trust, Series 2021-BMR, Class E, 1 mo. USD LIBOR + 1.750%
1.856% FRN 3/15/38  (a)		1,935,000		1,938,096
Manhattan West Mortgage Trust, Series 2020-1MW, Class B,
2.335% VRN 9/10/39  (a) (d)		2,122,000		2,128,330
MFT Trust
Series 2020-ABC, Class A, 3.358% 2/10/42  (a)		919,000		939,775
Series 2020-ABC, Class B, 3.477% VRN 2/10/42  (a) (d)		1,003,000		1,016,023
MKT Mortgage Trust
Series 2020-525M, Class D, 2.941% VRN 2/12/40  (a) (d)		475,000		468,074
Series 2020-525M, Class E, 2.941% VRN 2/12/40  (a) (d)		976,000		920,793
Morgan Stanley Capital I Trust
Series 2019-L2, Class AS, 4.272% 3/15/52		1,950,000		2,183,214
Series 2018-H3, Class B, 4.620% VRN 7/15/51  (d)		760,000		862,379
Series 2011-C2, Class B, 5.200% VRN 6/15/44  (a) (d)		1,325,000		1,326,933
Wells Fargo Commercial Mortgage Trust
Series 2018-C45, Class AS, 4.405% VRN 6/15/51  (d)		1,450,000		1,629,665
Series 2018-C45, Class B, 4.556% 6/16/51		400,000		445,561
				66,938,699

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Other Asset-Backed Securities — 17.3%
321 Henderson Receivables LLC, Series 2015-1A, Class A
3.260%  9/15/72  (a)	$	1,792,174	$	1,890,155
AASET Trust
Series 2020-1A, Class A, 3.351% 1/16/40  (a)		1,505,327		1,502,694
Series 2019-1, Class A, 3.844% 5/15/39  (a)		585,987		581,389
Series 2018-2A, Class A, 4.454% 11/18/38  (a)		305,768		308,235
Adams Outdoor Advertising LP, Series 2018-1, Class A
4.810%  11/15/48  (a)		1,887,047		2,021,332
AGL CLO 7 Ltd., Series 2020-7A, Class A1, 3 mo. USD LIBOR + 1.800%
2.041% FRN 7/15/31  (a)		375,000		375,791
AIMCO CLO, Series 2019-10A, Class C, 3 mo. USD LIBOR + 2.450%
2.672% FRN 7/22/32  (a)		2,000,000		2,000,918
Allegro CLO X Ltd., Series 2019-1A, Class C, 3 mo. USD LIBOR + 2.750%
2.974% FRN 4/20/32  (a)		2,200,000		2,200,260
Anchorage Capital CLO Ltd., Series 2020-15A, Class A, 3 mo. USD LIBOR + 1.850%
2.074% FRN 7/20/31  (a)		1,500,000		1,503,545
Assurant CLO Ltd., Series 2018-2A, Class C, 3 mo. USD LIBOR + 2.250%
2.474% FRN 10/20/31  (a)		820,000		820,063
Atrium XV, Series 15A, Class B, 3 mo. USD LIBOR + 1.750%
1.968% FRN 1/23/31  (a)		1,190,000		1,190,155
Avery Point VII CLO Ltd., Series 2015-7A, Class DR, 3 mo. USD LIBOR + 3.600%
3.841% FRN 1/15/28  (a)		1,000,000		1,000,205
Ballyrock CLO Ltd., Series 2019-2A, Class CR, 3 mo. USD LIBOR + 3.150%
3.332% FRN 11/20/30  (a)		400,000		394,481
Benefit Street Partners CLO XVIII Ltd., Series 2019-18A, Class B, 3 mo. USD LIBOR + 1.950%
2.191% FRN 10/15/32  (a)		500,000		501,118
BRE Grand Islander Timeshare Issuer LLC, Series 2017-1A, Class A
2.940%  5/25/29  (a)		427,821		428,960
Business Jet Securities LLC
Series 2021-1A, Class A, 2.162% 4/15/36  (a)		3,450,000		3,439,497
Series 2020-1A, Class A, 2.981% 11/15/35  (a)		686,869		695,194
Series 2021-1A, Class C, 5.067% 4/15/36  (a)		1,228,000		1,228,894
Canyon Capital CLO Ltd.
Series 2019-2A, Class A, 3 mo. USD LIBOR + 1.370% 1.611% FRN 10/15/32  (a)		1,400,000		1,404,907
Series 2019-2A, Class C, 3 mo. USD LIBOR + 2.750% 2.991% FRN 10/15/32  (a)		250,000		250,284
Capital Automotive REIT
Series 2020-1A, Class A3, 3.250% 2/15/50  (a)		471,238		485,517
Series 2014-1A, Class A, 3.660% 10/15/44  (a)		827,449		838,849
Series 2020-1A, Class A6, 3.810% 2/15/50  (a)		397,585		406,578
Series 2017-1A, Class A2, 4.180% 4/15/47  (a)		917,022		974,454
Carlyle Global Market Strategies CLO Ltd., Series 2015-3A, Class CR, 3 mo. USD LIBOR + 2.850%
3.069% FRN 7/28/28  (a)		330,000		321,616
Castlelake Aircraft Securitization Trust, Series 2019-1A, Class A
3.967%  4/15/39  (a)		1,229,665		1,227,051
Castlelake Aircraft Structured Trust, Series 2018-1, Class A
4.125%  6/15/43  (a)		1,223,607		1,226,069
CBAM Ltd.
Series 2019-10A, Class B, 3 mo. USD LIBOR + 2.050% 2.274% FRN 4/20/32  (a)		1,900,000		1,900,602
Series 2018-6A, Class B1R, 3 mo. USD LIBOR + 2.100% 2.341% FRN 1/15/31  (a)		900,000		900,259
Cedar Funding IX CLO Ltd., Series 2018-9A, Class A1, 3 mo. USD LIBOR + .980%
1.204% FRN 4/20/31  (a)		750,000		750,003
CF Hippolyta LLC, Series 2020-1, Class B1
2.280%  7/15/60  (a)		522,045		530,641
CIFC Funding Ltd.
Series 2017-5A, Class A1, 3 mo. USD LIBOR + 1.180% 1.403% FRN 11/16/30  (a)		2,330,000		2,330,364
Series 2020-1A, Class A1, 3 mo. USD LIBOR + 1.700% 1.941% FRN 7/15/32  (a)		1,000,000		1,001,876
Clear Creek CLO Ltd., Series 2015-1A, Class AR, 3 mo. USD LIBOR + 1.200%
1.424% FRN 10/20/30  (a)		2,040,000		2,040,414
CLI Funding VI LLC, Series 2020-3A, Class A
2.070%  10/18/45  (a)		1,557,875		1,557,827
DB Master Finance LLC, Series 2019-1A, Class A23
4.352%  5/20/49  (a)		1,534,630		1,650,964
Domino's Pizza Master Issuer LLC
Series 2019-1A, Class A2, 3.668% 10/25/49  (a)		1,089,000		1,150,906
Series 2017-1A, Class A23, 4.118% 7/25/47  (a)		756,600		813,102
Series 2015-1A, Class A2II, 4.474% 10/25/45  (a)		2,968,250		3,131,901
Dryden 72 CLO Ltd., Series 2019-72A, Class B, 3 mo. USD LIBOR + 1.900%
2.094% FRN 5/15/32  (a)		1,500,000		1,500,714
Eaton Vance CLO Ltd.
Series 2018-1A, Class B, 3 mo. USD LIBOR + 1.750% 1.991% FRN 10/15/30  (a)		1,700,000		1,700,192
Series 2019-1A, Class B, 3 mo. USD LIBOR + 1.950% 2.191% FRN 4/15/31  (a)		1,800,000		1,802,686
Series 2020-1A, Class C, 3 mo. USD LIBOR + 2.800% 3.041% FRN 10/15/30  (a)		350,000		351,104
Elmwood CLO II Ltd.
Series 2019-2A, Class AR, 3 mo. USD LIBOR + 1.150% 1.000% FRN 4/20/34  (a) (c)		2,800,000		2,800,000
Series 2019-2A, Class A, 3 mo. USD LIBOR + 1.450% 1.674% FRN 4/20/31  (a)		2,900,000		2,900,554
Elmwood CLO III Ltd., Series 2019-3A, Class B, 3 mo. USD LIBOR + 1.950%
2.191% FRN 10/15/32  (a)		350,000		351,051
FCI Funding  LLC, Series 2019-1A, Class A
3.630%  2/18/31  (a)		180,808		183,477
Flatiron CLO Ltd.
Series 2019-1A, Class B, 3 mo. USD LIBOR + 1.900% 2.094% FRN 11/16/32  (a)		350,000		350,775
Series 2019-1A, Class C, 3 mo. USD LIBOR + 2.700% 2.894% FRN 11/16/32  (a)		250,000		250,344

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Goodgreen Trust
Series 2019-2A, Class A, 2.760% 10/15/54  (a)	$	2,554,081	$	2,590,375
Series 2016-1A, Class A, 3.230% 10/15/52  (a)		1,431,824		1,457,752
Series 2017-1A, Class A, 3.740% 10/15/52  (a)		668,092		692,034
Series 2019-1A, Class A, 3.860% 10/15/54  (a)		1,169,110		1,226,602
Harbor Park CLO Ltd., Series 2018-1A, Class B1, 3 mo. USD LIBOR + 1.700%
1.924% FRN 1/20/31  (a)		1,290,000		1,290,246
Helios Issuer LLC, Series 2017-1A, Class A
4.940%  9/20/49  (a)		1,453,451		1,541,520
Hero Funding Trust
Series 2016-3A, Class A1, 3.080% 9/20/42  (a)		732,616		752,363
Series 2017-3A, Class A1, 3.190% 9/20/48  (a)		767,047		801,579
Series 2017-2A, Class A1, 3.280% 9/20/48  (a)		226,715		233,277
Series 2016-4A, Class A1, 3.570% 9/20/47  (a)		901,542		938,724
Series 2017-2A, Class A2, 4.070% 9/20/48  (a)		182,345		188,049
Series 2018-1A, Class A2, 4.670% 9/20/48  (a)		1,371,878		1,504,527
Horizon Aircraft Finance I Ltd.
Series 2019-1, Class A, 3.721% 7/15/39  (a)		1,298,330		1,296,791
Series 2018-1, Class A, 4.458% 12/15/38  (a)		925,711		936,638
Horizon Aircraft Finance III Ltd., Series 2019-2, Class A
3.425%  11/15/39  (a)		2,826,118		2,789,656
HPS Loan Management Ltd., Series 15A-19, Class A1, 3 mo. USD LIBOR + 1.320%
1.542% FRN 7/22/32  (a)		1,300,000		1,302,644
ICG US CLO Ltd., Series 2019-1A, Class A1A, 3 mo. USD LIBOR + 1.380%
1.595% FRN 10/26/32  (a)		750,000		751,601
ITE Rail Fund Levered LP, Series 2021-1A, Class A
2.250%  2/28/51  (a)		1,598,072		1,591,932
J.G. Wentworth LLC, Series 2018-2A, Class A
3.960%  10/15/75  (a)		1,327,773		1,467,670
KKR CLO Ltd., Series 28A, Class A, 3 mo. USD LIBOR + 1.140%
1.324% FRN 3/15/31  (a)		900,000		900,036
KREF Ltd., Series 2018-FL1, Class C, 1 mo. USD LIBOR + 2.000%
2.108% FRN 6/15/36  (a)		1,670,000		1,665,818
Labrador Aviation Finance Ltd., Series 2016-1A, Class A1
4.300%  1/15/42  (a)		2,129,134		2,084,951
Lunar Aircraft Ltd., Series 2020-1A, Class A
3.376%  2/15/45  (a)		618,842		606,438
MACH 1 Cayman Ltd., Series 2019-1, Class A
3.474%  10/15/39  (a)		1,854,339		1,865,363
Madison Park Funding Ltd.
Series 2018-28A, Class B, 3 mo. USD LIBOR + 1.600% 1.841% FRN 7/15/30  (a)		1,665,000		1,665,063
Series 2018-32A, Class CR, 3 mo. USD LIBOR + 2.000% 2.188% FRN 1/22/31  (a)		1,000,000		998,098
Series 2018-29A, Class C, 3 mo. USD LIBOR + 2.200% 2.423% FRN 10/18/30  (a)		620,000		620,078
Magnetite XXVI Ltd., Series 2020-26A, Class A, 3 mo. USD LIBOR + 1.750%
1.991% FRN 7/15/30  (a)		1,500,000		1,502,901
Magnetite XXVII Ltd., Series 2020-27A, Class C, 3 mo. USD LIBOR + 2.650%
2.874% FRN 7/20/33  (a)		450,000		450,769
Mariner Finance Issuance Trust
Series 2021-AA, Class B, 2.330% 3/20/36  (a)		1,336,000		1,338,471
Series 2021-AA, Class C, 2.960% 3/20/36  (a)		637,000		639,233
Mosaic Solar Loans LLC
Series 2018-1A, Class A, 4.010% 6/22/43  (a)		259,281		279,463
Series 2017-1A, Class A, 4.450% 6/20/42  (a)		262,998		286,631
MP CLO III Ltd., Series 2013-1A, Class AR, 3 mo. USD LIBOR + 1.250%
1.474% FRN 10/20/30  (a)		1,750,000		1,750,131
MVW Owner Trust, Series 2017-1A, Class A
2.420%  12/20/34  (a)		135,438		139,742
NP SPE LLC, Series 2017-1A, Class A2
4.219%  10/21/47  (a)		2,260,000		2,295,636
Oak Street Investment Grade Net Lease Fund, Series 2020-1A, Class A5
3.390%  11/20/50  (a)		1,200,000		1,224,713
OCP CLO 2018-15 Ltd., Series 2018-15A, Class A1, 3 mo. USD LIBOR + 1.100%
1.324% FRN 7/20/31  (a)		250,000		250,004
OHA Credit Funding Ltd.
Series 2019-4A, Class A1, 3 mo. USD LIBOR + 1.330% 1.552% FRN 10/22/32  (a)		1,000,000		1,002,663
Series 2019-4A, Class C, 3 mo. USD LIBOR + 2.650% 2.872% FRN 10/22/32  (a)		500,000		501,237

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
OHA Loan Funding 2015-1 Ltd., Series 2015-1A, Class A1R2, 3 mo. USD LIBOR + 1.340%
1.534% FRN 11/15/32  (a)	$	550,000	$	551,984
OneMain Financial Issuance Trust
Series 2020-2A, Class B, 2.210% 9/14/35  (a)		396,000		398,125
Series 2019-2A, Class A, 3.140% 10/14/36  (a)		8,400,000		8,923,708
Oxford Finance Funding Trust, Series 2020-1A, Class A2
3.101%  2/15/28  (a)		1,536,000		1,570,241
Pioneer Aircraft Finance Ltd., Series 2019-1, Class A
3.967%  6/15/44  (a)		1,476,910		1,466,085
Planet Fitness Master Issuer LLC, Series 2019-1A, Class A2
3.858%  12/05/49  (a)		2,292,975		2,185,780
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850%
2.959% FRN 2/25/23  (a)		1,270,000		1,268,482
Renew, Series 2021-1, Class A
2.060%  11/20/56  (a) (c)		1,805,000		1,804,729
Rockford Tower CLO Ltd., Series 2019-1A, Class B1R, 3 mo. USD LIBOR + 1.550%
1.738% FRN 4/20/34  (a)		1,500,000		1,500,149
RR 3 Ltd., Series 2018-3A, Class A1R2, 3 mo. USD LIBOR + 1.090%
1.331% FRN 1/15/30  (a)		2,450,000		2,447,653
Sierra Receivables Funding LLC
Series 2020-2A, Class B, 2.320% 7/20/37  (a)		769,740		781,008
Series 2021-1A, Class D, 3.170% 11/20/37  (a)		1,631,000		1,612,888
Series 2018-3A, Class D, 5.200% 9/20/35  (a)		597,722		612,986
Stack Infrastructure Issuer LLC, Series 2020-1A, Class A2
1.893%  8/25/45  (a)		874,000		875,905
Steele Creek CLO Ltd., Series 2018-2A, Class C, 3 mo. USD LIBOR + 2.300%
2.489% FRN 8/18/31  (a)		1,170,000		1,132,290
Store Master Funding I-VII
Series 2019-1, Class A2, 3.650% 11/20/49  (a)		2,836,947		2,894,807
Series 2018-1A, Class A2, 4.290% 10/20/48  (a)		1,288,589		1,365,968
Structured Asset Securities Corp. Mortgage Loan Trust, Series 2006-GEL1, Class M2, 1 mo. USD LIBOR + 1.200%
0.909% FRN 11/25/35  (a)		2,682,893		2,599,082
Structured Receivables Finance LLC, Series 2010-B, Class A
3.730%  8/15/36  (a)		126,837		132,530
Sunnova Helios II Issuer LLC, Series 2018-1A, Class A
4.870%  7/20/48  (a)		428,027		458,602
SuttonPark Structured Settlements LLC, Series 2017-1A, Class A
4.190%  1/15/71  (a)		1,889,629		2,048,449
Taco Bell Funding LLC, Series 2018-1A, Class A2II
4.940%  11/25/48  (a)		1,114,350		1,201,007
TAL Advantage VII LLC, Series 2020-1A, Class A
2.050%  9/20/45  (a)		4,263,750		4,256,814
Textainer Marine Containers Ltd., Series 2019-1A, Class A
3.960%  4/20/44  (a)		463,973		463,328
Tif Funding II LLC, Series 2020-1A, Class A
2.090%  8/20/45  (a)		617,738		618,049
Trinity Rail Leasing LP
Series 2019-2A, Class A2, 3.100% 10/18/49  (a)		3,289,000		3,354,118
Series 2018-1A, Class A2, 4.620% 6/17/48  (a)		2,420,000		2,450,944
Trip Rail Master Funding LLC, Series 2017-1A, Class A1
2.709%  8/15/47  (a)		74,578		74,626
Triton Container Finance VIII LLC, Series 2020-1A, Class A
2.110%  9/20/45  (a)		3,016,125		2,989,998
Vantage Data Centers LLC, Series 2020-2A, Class A2
1.992%  9/15/45  (a)		1,301,000		1,277,801
Vivint Solar Financing V LLC, Series 2018-1A, Class B
7.370%  4/30/48  (a)		2,430,695		2,587,497
WAVE LLC
Series 2019-1A, Class A, 3.597% 9/15/44  (a)		3,764,151		3,765,021
Series 2017-1A, Class C, 6.656% 11/15/42  (a)		1,874,228		1,522,013
WAVE Trust, Series 2017-1A, Class A
3.844%  11/15/42  (a)		1,441,989		1,416,810
Willis Engine Structured Trust IV, Series 2018-A, Class A,
4.750% STEP 9/15/43  (a)		1,136,332		1,129,946
Wind River CLO Ltd.
Series 2018-2A, Class B, 3 mo. USD LIBOR + 1.750% 1.991% FRN 7/15/30  (a)		1,150,000		1,150,068
Series 2016-2A, Class BR, 3 mo. USD LIBOR + 1.800% 2.005% FRN 11/01/31  (a)		900,000		900,167
				170,379,044

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Student Loans Asset-Backed Securities — 6.8%
Chase Education Loan Trust, Series 2007-A, Class A4, 3 mo. USD LIBOR + .100%
0.351% FRN 3/28/68	$	3,474,660	$	3,406,091
College Avenue Student Loans LLC
Series 2019-A, Class B, 3.810% 12/28/48  (a)		2,244,000		2,305,042
Series 2019-A, Class C, 4.460% 12/28/48  (a)		1,281,000		1,307,611
College Loan Corp. Trust I, Series 2007-1, Class B2,
1.627% FRN 1/25/47  (d)		900,000		719,572
ECMC Group Student Loan Trust, Series 2018-2A, Class A, 1 mo. USD LIBOR + .800%
0.909% FRN 9/25/68  (a)		1,922,301		1,926,217
EdLinc Student Loan Funding, Series 2017-A, Class A, PRIME - 1.150%
2.100% FRN 12/01/47  (a)		1,532,564		1,513,417
Education Services of America
Series 2014-4, Class B, 1 mo. USD LIBOR + 1.500% 1.609% FRN 6/25/48  (a)		1,200,000		1,171,378
Series 2015-1, Class B, 1 mo. USD LIBOR + 1.500% 1.609% FRN 10/25/56  (a)		1,100,000		1,082,231
Educational Funding of the South, Inc., Series 2011-1, Class B, 3 mo. USD LIBOR + 3.700%
3.918% FRN 4/25/46		625,000		594,653
EDvestinU Private Education Loan Issue No 1 LLC, Series 2019-A, Class A,
3.580% VRN 11/25/38  (a) (d)		1,159,016		1,201,593
Higher Education Funding I
Series 2004-1, Class B2, 0.000% FRN 1/01/44  (a) (d)		450,000		392,810
Series 2004-1, Class B1, 1.796% FRN 1/01/44  (a) (d)		450,000		401,157
Laurel Road Prime Student Loan Trust, Series 2017-B, Class BFX
3.020%  8/25/42  (a)		547,785		542,476
Navient Private Education Loan Trust, Series 2020-IA, Class B
2.950%  4/15/69  (a)		2,352,000		2,359,924
Navient Private Education Refi Loan Trust
Series 2021-BA, Class B, 2.520% 7/15/69  (a)		2,620,000		2,581,231
Series 2019-CA, Class B, 3.670% 2/15/68  (a)		2,249,000		2,221,855
Series 2019-A, Class B, 3.900% 1/15/43  (a)		1,190,000		1,177,116
Series 2018-CA, Class B, 4.220% 6/16/42  (a)		1,530,000		1,572,964
Navient Student Loan Trust
Series 2019-1A, Class A2, 1 mo. USD LIBOR + .900% 1.009% FRN 12/27/67  (a)		4,514,941		4,585,483
Series 2016-7A, Class A, 1 mo. USD LIBOR + 1.150% 1.259% FRN 3/25/66  (a)		1,688,069		1,708,092
Series 2016-5A, Class A, 1 mo. USD LIBOR + 1.250% 1.359% FRN 6/25/65  (a)		3,051,360		3,116,115
Series 2015-3, Class B, 1 mo. USD LIBOR + 1.500% 1.609% FRN 10/25/58		940,000		946,480
Series 2016-2, Class A3, 1 mo. USD LIBOR + 1.500% 1.609% FRN 6/25/65  (a)		2,370,000		2,452,204
Series 2019-BA, Class B, 4.040% 12/15/59  (a)		2,950,000		2,924,490
Nelnet Private Education Loan Trust, Series 2016-A, Class A1B
3.600%  12/26/40  (a)		262,818		264,063
Nelnet Student Loan Trust
Series 2006-3, Class B, 3 mo. USD LIBOR + .250% 0.451% FRN 6/25/41		531,955		471,292
Series 2019-2A, Class A, 1 mo. USD LIBOR + .900% 1.009% FRN 6/27/67  (a)		1,598,572		1,601,943
Series 2005-4, Class A4A, 1.145% FRN 3/22/32  (d)		275,000		264,675
Series 2019-1A, Class B, 1 mo. USD LIBOR + 1.400% 1.509% FRN 4/25/67  (a)		3,250,000		3,210,604
Series 2019-5, Class B, 3.450% 10/25/67  (a)		2,150,000		2,008,976
SLC Student Loan Trust, Series 2007-1, Class A5, 3 mo. USD LIBOR + .090%
0.284% FRN 2/15/68		1,500,000		1,444,195
SLM Student Loan Trust
Series 2006-2, Class R, 0.000% 1/25/41		7,308		4,509,604
Series 2006-5, Class B, 3 mo. USD LIBOR + .210% 0.428% FRN 10/25/40		1,756,731		1,621,446
Series 2005-6, Class B, 3 mo. USD LIBOR + .290% 0.508% FRN 1/25/44		1,824,363		1,681,234
SoFi Alternative Trust, Series 2019-C, Class PT,
2.322% VRN 1/25/45  (a) (d)		3,869,565		4,115,554
SoFi Professional Loan Program LLC, Series 2017-C, Class C,
4.210% VRN 7/25/40  (a) (d)		990,000		1,016,813
South Carolina Student Loan Corp., Series 2014-1, Class B, 1 mo. USD LIBOR + 1.500%
1.615% FRN 8/01/35		3,050,000		2,933,448
				67,354,049

MML Managed Bond Fund —  Portfolio of Investments (Contiuned)

	Principal Amount		Value
Whole Loan Collateral Collateralized Mortgage Obligations — 0.3%
Bank of America Mortgage Securities, Series 2004-G, Class 2A7,
3.074% VRN 8/25/34  (d)	$	15,883	$	15,654
JP Morgan Mortgage Trust, Series 2017-1, Class A11,
3.500% VRN 1/25/47  (a) (d)		1,233,846		1,236,484
PSMC Trust, Series 2018-2, Class A1,
3.500% VRN 6/25/48  (a) (d)		775,695		784,714
Wells Fargo Mortgage Backed Securities Trust, Series 2019-1, Class A1,
4.000% VRN 11/25/48  (a) (d)		416,232		422,264
				2,459,116
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $319,260,059)				324,061,007
Sovereign Debt Obligations — 0.8%
Colombia Government International Bond
6.125% 1/18/41		2,080,000		2,463,219
Mexico Government International Bond
4.500% 4/22/29		875,000		969,386
4.750% 3/08/44		3,727,000		3,913,946
6.750% 9/27/34		685,000		875,951
TOTAL SOVEREIGN DEBT OBLIGATIONS  (Cost $7,715,553)				8,222,502
U.S. Government Agency Obligations and Instrumentalities — 21.3%
Collateralized Mortgage Obligations — 1.3%
Federal Home Loan Mortgage Corp.
Series 2178, Class PB  7.000% 8/15/29		27,865		31,465
Federal Home Loan Mortgage Corp. Multifamily Structured Pass Through Certificates
Series K124, Class A2, 1.658% 2/25/54		3,352,000		3,275,867
Series K125, Class A2, 1.846% 1/25/31		5,915,000		5,877,499
Federal National Mortgage Association ACES
Series 2021-M4, Class A2  1.466% 2/25/31 (d)		3,396,000		3,248,714
				12,433,545
Pass-Through Securities — 19.8%
Federal Home Loan Mortgage Corp.
Pool #RA4245 2.000% 12/01/50		2,574,284		2,572,295
Pool #RA4255 2.000% 1/01/51		5,411,989		5,414,572
Pool #J13972 3.500% 1/01/26		22,261		23,755
Pool #C91344 3.500% 11/01/30		72,016		76,838
Pool #C91424 3.500% 1/01/32		43,832		46,849
Pool #RA2483 3.500% 6/01/50		8,102,222		8,590,860
Pool #C91239 4.500% 3/01/29		3,676		4,081
Pool #C91251 4.500% 6/01/29		24,265		26,939
Pool #C90939 5.500% 12/01/25		12,685		14,173
Pool #D97258 5.500% 4/01/27		9,322		10,445
Pool #C91026 5.500% 4/01/27		22,301		24,988
Pool #C91074 5.500% 8/01/27		2,340		2,622
Pool #D97417 5.500% 10/01/27		8,891		9,963
Pool #C91128 5.500% 12/01/27		1,261		1,413
Pool #C91148 5.500% 1/01/28		53,052		59,476
Pool #C91176 5.500% 5/01/28		19,270		21,604
Pool #C91217 5.500% 11/01/28		5,526		6,201
Federal National Mortgage Association
Pool #775539 12 mo. USD LIBOR + 1.641% 2.516% FRN 5/01/34		13,410		13,913
Pool #MA3029 3.000% 6/01/32		2,224,428		2,355,086
Pool #MA3090 3.000% 8/01/32		927,880		980,932
Pool #AO8180 3.000% 9/01/42		17,980		19,077
Pool #AB7397 3.000% 12/01/42		104,539		110,882
Pool #AB7401 3.000% 12/01/42		86,453		91,699
Pool #AP8668 3.000% 12/01/42		121,132		128,482
Pool #AR1975 3.000% 12/01/42		26,251		27,844
Pool #AR0306 3.000% 1/01/43		7,801		8,275
Pool #AR5391 3.000% 1/01/43		41,207		43,708
Pool #AL3215 3.000% 2/01/43		83,992		89,088
Pool #AR4109 3.000% 2/01/43		87,808		93,136
Pool #AR4432 3.000% 3/01/43		37,437		39,709
Pool #AT0169 3.000% 3/01/43		198,636		210,689
Pool #AB8809 3.000% 3/01/43		42,871		45,473
Pool #MA1368 3.000% 3/01/43		164,306		174,275
Pool #AR2174 3.000% 4/01/43		161,415		171,209
Pool #AS1304 3.500% 12/01/28		839,677		900,815
Pool #MA1356 3.500% 2/01/43		6,559,403		7,164,076
Pool #CA6096 3.500% 6/01/50		7,744,541		8,250,331
Pool #FM4017 3.500% 8/01/50		709,542		748,343
Pool #AA3980 4.500% 4/01/28		44,459		48,345
Pool #CA1909 4.500% 6/01/48		4,137,335		4,513,097
Pool #AD6437 5.000% 6/01/40		316,033		364,053
Pool #AD6996 5.000% 7/01/40		1,929,641		2,222,841
Pool #AL8173 5.000% 2/01/44		866,063		995,763
Pool #AD0836 5.500% 11/01/28		42,583		47,700

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount			Value
Government National Mortgage Association
Pool #371146 7.000% 9/15/23	$	35	$		36
Pool #352022 7.000% 11/15/23		1,761			1,859
Pool #374440 7.000% 11/15/23		152			160
Pool #491089 7.000% 12/15/28		5,754			6,265
Pool #480539 7.000% 4/15/29		198			223
Pool #488634 7.000% 5/15/29		1,828			2,082
Pool #500928 7.000% 5/15/29		2,941			3,383
Pool #499410 7.000% 7/15/29		1,059			1,222
Pool #510083 7.000% 7/15/29		715			817
Pool #493723 7.000% 8/15/29		2,155			2,488
Pool #581417 7.000% 7/15/32		4,192			4,778
Government National Mortgage Association II
Pool #008746 1 year CMT + 1.500% 2.125% FRN 11/20/25		2,246			2,281
Pool #080136 1 year CMT + 1.500% 2.125% FRN 11/20/27		531			541
Pool #MA6038 3.000% 7/20/49		4,975,055			5,206,418
Pool #MA6283 3.000% 11/20/49		8,856,642			9,251,218
Pool #MA6409 3.000% 1/20/50		8,957,853			9,348,540
Pool #MA4321 3.500% 3/20/47		5,033,411			5,353,780
Government National Mortgage Association II TBA
2.500% 6/01/50 (c)		14,900,000			15,359,805
3.000% 8/01/49  (c)		5,675,000			5,906,877
3.500% 6/01/49  (c)		14,620,000			15,424,100
Uniform Mortgage Backed Securities TBA
2.000% 1/01/36(c)		25,400,000			26,058,813
2.500% 7/01/50 (c)		9,675,000			9,920,654
3.000% 6/01/49 (c)		34,975,000			36,420,450
3.500% 3/01/49  (c)		10,100,000			10,667,336
					195,710,041
Whole Loans — 0.2%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes
Series 2016-HQA3, Class M2, 1 mo. USD LIBOR + 1.350% 1.459% FRN 3/25/29		44,129			44,149
Series 2020-DNA3, Class M2, 1 mo. USD LIBOR + 3.000% 3.109% FRN 6/25/50  (a)		1,571,869			1,577,151
					1,621,300
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $210,268,045)					209,764,886
U.S. Treasury Obligations — 5.0%
U.S. Treasury Bonds & Notes — 5.0%
U.S. Treasury Bond
2.250% 8/15/49  (e)		18,100,000			17,450,898
3.500% 2/15/39		13,700,000			16,379,079
U.S. Treasury Note
0.250%  10/31/25		15,800,000			15,378,473
					49,208,450
TOTAL U.S. TREASURY OBLIGATIONS  (Cost $52,696,629)					49,208,450
TOTAL BONDS & NOTES (Cost $951,490,342)					968,926,888
TOTAL PURCHASED OPTIONS (#) — 0.3% (Cost $2,989,580)					3,002,961
TOTAL LONG-TERM INVESTMENTS  (Cost $954,479,922)					971,929,849
Short-Term Investments — 13.8%
Commercial Paper — 13.0%
Amcor Flexibles North American
0.193% 4/30/21 (a)		7,000,000			6,998,950
American Electric Power Co., Inc.
0.203% 4/19/21 (a)		8,000,000			7,999,303
American Honda Finance Corp.
0.213% 6/07/21		1,000,000			999,579
0.254% 6/04/21		9,000,000			8,996,392
AT&T, Inc.
0.294% 7/13/21 (a)		1,000,000			999,350
0.346% 9/21/21 (a)		10,000,000			9,987,143
BAT International Finance PLC
0.304% 4/22/21 (a)		5,000,000			4,999,484
Dominion Resources
0.203% 4/12/21		10,000,000			9,999,480
Ei Dupont
0.213% 5/05/21 (a)		10,000,000			9,998,172
Entergy Corp.
0.213% 5/20/21 (a)		10,000,000			9,996,625
Holcim US Finance SARL & Cie
0.223% 4/23/21 (a)		3,000,000			2,999,672

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Intercontinental Exchange, Inc.
0.355% 5/24/21 (a)	$	5,000,000	$	4,997,750
Nasdaq, Inc.
0.264% 5/10/21 (a)		2,000,000		1,999,318
National Grid Holdings
0.172% 4/28/21 (a)		5,000,000		4,999,312
NextEra Energy Capital Holdings, Inc.
0.183% 4/16/21 (a)		11,000,000		10,999,213
Nisource, Inc.
0.172% 4/06/21 (a)		2,000,000		1,999,950
Societe Generale
0.203% 5/10/21 (a)		3,000,000		2,999,677
Volkswagen Credit, Inc
0.244% 4/13/21 (a)		2,000,000		1,999,887
0.244% 4/19/21 (a)		9,000,000		8,999,216
Walgreens Boots Alliance, Inc.
0.193% 4/13/21 (a)		2,000,000		1,999,865
0.233% 4/27/21 (a)		7,000,000		6,998,918
0.243% 4/20/21 (a)		1,000,000		999,891
Waste Management, Inc.
0.356% 7/01/21 (a)		5,000,000		4,996,703
				127,963,850
Repurchase Agreement — 0.8%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/21, 0.000%, due 4/01/21 (f)		7,452,684		7,452,684
TOTAL SHORT-TERM INVESTMENTS  (Cost $135,410,143)				135,416,534
TOTAL INVESTMENTS — 112.3% (Cost $1,089,890,065) (g)				1,107,346,383
Other Assets/(Liabilities) — (12.3)%				(121,110,205	)
NET ASSETS — 100.0%			$	986,236,178

Abbreviation Legend

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 March 31, 2021, the aggregate market value of these securities amounted to $489,412,537 or 49.62% 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 March 31, 2021.
(e)	A portion of this security is pledged/held as collateral for open derivatives.
(f)	Maturity value of $7,452,684. Collateralized by U.S. Government Agency obligations with a rate of 1.750%, maturity date of 12/31/24, and an aggregate market value, including accrued interest, of $7,601,817.
(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	$	214,230	$	184,972	$	29,258
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	$	2,788,731	$	2,804,608	$	(15,877	)
									$	3,002,961	$	2,989,580	$	13,381

Futures contracts

	Expiration Date	Number of Contracts	Notional Amount			Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Long Bond	6/21/21	75	$	12,045,950		$	(451,419	)
U.S. Treasury Ultra Bond	6/21/21	226		43,022,631			(2,067,193	)
U.S. Treasury Note 2 Year	6/30/21	693		153,102,107			(138,600	)
U.S. Treasury Note 5 Year	6/30/21	169		21,109,692			(255,356	)
						$	(2,912,568	)
Short
U.S. Treasury Ultra 10 Year	6/21/21	136	$	(19,893,425	)	$	351,925
90 Day Eurodollar	9/13/21	17		(4,146,456	)		(95,469	)
90 Day Eurodollar	3/14/22	15		(3,657,513	)		(83,675	)
90 Day Eurodollar	9/19/22	14		(3,412,279	)		(74,771	)
90 Day Eurodollar	3/13/23	12		(2,923,010	)		(58,840	)
90 Day Eurodollar	12/18/23	15		(3,650,388	)		(54,425	)
90 Day Eurodollar	12/16/24	40		(9,722,367	)		(90,633	)
						$	(105,888	)

Currency Legend

USD U.S. Dollar

MML Short-Duration Bond Fund —  Portfolio of Investments

March 31, 2021 (Unaudited)

	Principal Amount		Value
Bonds & Notes — 96.9%
Corporate Debt — 46.6%
Aerospace & Defense — 0.3%
The Boeing Co.
1.167% 2/04/23	$	560,000	$	562,838
Agriculture — 1.3%
BAT Capital Corp.
3.222% 8/15/24		415,000		441,752
4.700% 4/02/27		410,000		461,285
Imperial Brands Finance PLC
3.125% 7/26/24 (a)		400,000		422,685
3.500% 2/11/23 (a)		387,000		402,569
Wens Foodstuffs Group Co. Ltd.
2.349% 10/29/25 (a)		700,000		670,509
				2,398,800
Airlines — 0.1%
Delta Air Lines, Inc./SkyMiles IP Ltd.
4.500% 10/20/25 (a)		185,000		196,999
Auto Manufacturers — 2.0%
Ford Motor Credit Co. LLC
3 mo. USD LIBOR + .810% 1.048% FRN 4/05/21		405,000		405,000
3 mo. USD LIBOR + 1.235% 1.429% FRN 2/15/23		275,000		272,266
3.087% 1/09/23		260,000		264,220
3.350% 11/01/22		365,000		372,373
General Motors Co.
6.125% 10/01/25		135,000		158,687
General Motors Financial Co., Inc.
3.250% 1/05/23		829,000		863,533
Harley-Davidson Financial Services, Inc.
3.350% 6/08/25 (a)		209,000		218,944
Hyundai Capital America
2.375% 2/10/23 (a)		600,000		615,878
2.850% 11/01/22 (a)		320,000		330,002
Nissan Motor Acceptance Corp.
1.900% 9/14/21 (a)		200,000		200,894
				3,701,797
Auto Parts & Equipment — 0.3%
Metalsa SA de CV
4.900% 4/24/23 (a)		450,000		473,400
Banks — 9.1%
ABN AMRO Bank NV
4.750% 7/28/25 (a)		435,000		486,701
Arab National Bank 5 year CMT + 2.974%
3.326% VRN 10/28/30 (a)		650,000		665,928
Banco de Credito del Peru 5 year CMT + 3.000%
3.125% VRN 7/01/30 (a)		625,000		625,000
Banco Santander SA
1.849% 3/25/26		600,000		598,577
Bank of America Corp.
3 mo. USD LIBOR + .930% 2.816% VRN 7/21/23		930,000		957,363
3.950% 4/21/25		178,000		195,049
4.000% 1/22/25		647,000		706,893
The Bank of Nova Scotia
4.500% 12/16/25		829,000		936,644
Barclays Bank PLC
10.179% 6/12/21 (a)		504,000		512,654
Barclays PLC 3 mo. USD LIBOR + 1.380%
1.574% FRN 5/16/24		485,000		491,929
BPCE SA
5.700% 10/22/23 (a)		825,000		921,766
Citigroup, Inc.
4.400% 6/10/25		635,000		705,525
Credit Suisse AG
6.500% 8/08/23 (a)		930,000		1,022,767
Danske Bank A/S
5.000% 1/12/22 (a)		455,000		469,977
Deutsche Bank AG SOFR + 2.159%
2.222% VRN 9/18/24		685,000		703,097
The Goldman Sachs Group, Inc.
4.250% 10/21/25		1,675,000		1,869,724
HSBC Holdings PLC
4.250% 3/14/24		865,000		940,286
ING Groep NV SOFR + .920%
1.726% VRN 4/01/27 (b)		407,000		406,416
Macquarie Group Ltd. SOFR + 1.069%
1.340% VRN 1/12/27 (a)		525,000		514,911
Morgan Stanley
4.350% 9/08/26		1,150,000		1,299,932
Sberbank of Russia Via SB Capital SA
5.250% 5/23/23 (a)		650,000		688,089
Societe Generale SA 1 year CMT + 1.100%
1.488% VRN 12/14/26 (a)		525,000		515,728
Synchrony Bank
3.000% 6/15/22		470,000		482,816
UBS Group AG
4.125% 9/24/25 (a)		355,000		393,877
				17,111,649

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

	Principal Amount		Value
Beverages — 0.4%
Bacardi Ltd.
4.450% 5/15/25 (a)	$	548,000	$	608,975
Molson Coors Beverage Co.
2.100% 7/15/21		230,000		230,720
				839,695
Chemicals — 1.2%
DuPont de Nemours, Inc.
4.493% 11/15/25		705,000		796,444
MEGlobal Canada ULC
5.000% 5/18/25 (a)		450,000		500,063
RPM International, Inc.
3.450% 11/15/22		8,000		8,281
Syngenta Finance NV
4.441% 4/24/23 (a)		570,000		597,134
4.892% 4/24/25 (a)		335,000		358,492
				2,260,414
Commercial Services — 0.9%
Adani Ports & Special Economic Zone Ltd.
3.375% 7/24/24 (a)		1,443,000		1,512,924
Element Fleet Management
1.600% 4/06/24 (a) (b)		240,000		239,719
				1,752,643
Computers — 0.9%
Dell International LLC / EMC Corp.
4.000% 7/15/24 (a)		414,000		449,244
5.850% 7/15/25 (a)		432,000		503,438
Genpact Luxembourg Sarl
3.700% STEP 4/01/22		635,000		650,833
				1,603,515
Distribution & Wholesale — 0.7%
Li & Fung Ltd.
4.500% 8/18/25 (a)		1,350,000		1,373,952
Diversified Financial Services — 4.3%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust
2.875% 8/14/24		1,025,000		1,056,887
4.500% 9/15/23		255,000		274,268
Aircastle Ltd.
5.000% 4/01/23		1,010,000		1,076,474
Antares Holdings LP
3.950% 7/15/26 (a)		430,000		433,455
6.000% 8/15/23 (a)		473,000		496,048
Aviation Capital Group LLC
1.950% 1/30/26 (a)		480,000		467,459
Avolon Holdings Funding Ltd.
2.875% 2/15/25 (a)		335,000		333,648
BGC Partners, Inc.
4.375% 12/15/25 (a)		505,000		537,476
Brookfield Finance, Inc.
4.000% 4/01/24		330,000		358,309
Lazard Group LLC
3.750% 2/13/25		805,000		874,302
LeasePlan Corp. NV
2.875% 10/24/24 (a)		280,000		294,360
Park Aerospace Holdings Ltd.
5.250% 8/15/22 (a)		1,250,000		1,312,241
SPARC EM SPC Panama Metro Line 2 SP
0.000% 12/05/22 (a)		233,565		227,728
Synchrony Financial
2.850% 7/25/22		355,000		364,541
				8,107,196
Electric — 1.1%
Alliant Energy Finance LLC
1.400% 3/15/26 (a)		260,000		254,932
National Central Cooling Co. PJSC
2.500% 10/21/27 (a)		618,000		605,640
Pacific Gas and Electric Co.
1.750% 6/16/22		970,000		971,469
Puget Energy, Inc.
6.000% 9/01/21		260,000		265,730
				2,097,771
Energy – Alternate Sources — 0.2%
SK Battery America, Inc.
1.625% 1/26/24 (a)		300,000		297,432
Gas — 0.7%
Atmos Energy Corp.
0.625% 3/09/23		365,000		365,142
ONE Gas, Inc.
1.100% 3/11/24		960,000		959,653
				1,324,795

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

	Principal Amount		Value
Housewares — 0.5%
Newell Brands, Inc.
4.350% STEP 4/01/23	$	979,000	$	1,034,049
Insurance — 2.3%
AmTrust Financial Services, Inc.
6.125% 8/15/23		620,000		620,336
Athene Global Funding
2.750% 6/25/24 (a)		820,000		863,750
CNO Financial Group, Inc.
5.250% 5/30/25		830,000		939,525
Enstar Group Ltd.
4.500% 3/10/22		685,000		705,671
GA Global Funding Trust
1.625% 1/15/26 (a)		260,000		259,552
Trinity Acquisition PLC
3.500% 9/15/21		350,000		353,729
Unum Group
3.875% 11/05/25		620,000		670,765
				4,413,328
Internet — 0.3%
Weibo Corp.
3.500% 7/05/24		450,000		474,110
Investment Companies — 1.8%
Ares Capital Corp.
3.875% 1/15/26		535,000		563,598
4.200% 6/10/24		523,000		563,867
BlackRock TCP Capital Corp.
3.900% 8/23/24		360,000		381,703
4.125% 8/11/22		675,000		698,064
Golub Capital BDC, Inc.
2.500% 8/24/26		270,000		264,013
Sixth Street Specialty Lending, Inc.
2.500% 8/01/26		125,000		123,905
3.875% 11/01/24		755,000		792,131
				3,387,281
Iron & Steel — 1.9%
Reliance Steel & Aluminum Co.
1.300% 8/15/25		355,000		350,443
Severstal OAO Via Steel Capital SA
3.150% 9/16/24 (a)		1,443,000		1,480,599
Steel Dynamics, Inc.
2.400% 6/15/25		165,000		171,906
2.800% 12/15/24		250,000		264,348
Vale Overseas Ltd.
6.250% 8/10/26		1,030,000		1,225,185
				3,492,481
Leisure Time — 0.1%
Harley-Davidson, Inc.
3.500% 7/28/25		255,000		271,231
Lodging — 0.5%
Las Vegas Sands Corp.
3.200% 8/08/24		775,000		807,967
Marriott International, Inc.
5.750% 5/01/25		161,000		184,682
				992,649
Machinery – Diversified — 0.3%
CNH Industrial Capital LLC
3.875% 10/15/21		635,000		645,748
Media — 1.4%
Cable Onda SA
4.500% 1/30/30 (a)		630,000		669,041
Sirius XM Radio, Inc.
3.875% 8/01/22 (a)		1,047,000		1,050,926
ViacomCBS, Inc.
4.750% 5/15/25		840,000		949,656
				2,669,623
Mining — 0.5%
Glencore Finance Canada Ltd.
4.250% STEP 10/25/22 (a)		254,000		267,530
Glencore Funding LLC
4.125% 5/30/23 (a)		360,000		384,973
Kinross Gold Corp.
5.125% 9/01/21		370,000		372,668
				1,025,171
Multi-National — 0.5%
Africa Finance Corp.
3.125% 6/16/25 (a)		957,000		983,432

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

	Principal Amount		Value
Oil & Gas — 2.7%
Cenovus Energy, Inc.
3.000% 8/15/22	$	500,000	$	511,521
Continental Resources, Inc.
5.000% 9/15/22		143,000		143,115
Diamondback Energy, Inc.
0.900% 3/24/23		625,000		624,908
EQT Corp.
3.000% 10/01/22		565,000		573,475
7.625% STEP 2/01/25		320,000		368,283
Occidental Petroleum Corp.
5.500% 12/01/25		1,100,000		1,161,039
Ovintiv Exploration, Inc.
5.625% 7/01/24		505,000		555,115
Petroleos Mexicanos
4.625% 9/21/23		1,215,000		1,252,908
				5,190,364
Packaging & Containers — 0.2%
Graphic Packaging International LLC
1.512% 4/15/26 (a)		395,000		392,076
Pharmaceuticals — 1.0%
AbbVie, Inc.
3.800% 3/15/25		345,000		377,297
McKesson Corp.
0.900% 12/03/25		485,000		474,786
Mylan, Inc.
3.125% 1/15/23 (a)		525,000		546,994
Teva Pharmaceutical Finance Netherlands III BV
2.200% 7/21/21		240,000		239,700
Viatris, Inc.
1.650% 6/22/25 (a)		190,000		190,630
				1,829,407
Pipelines — 1.6%
Energy Transfer Operating LP
4.200% 9/15/23		960,000		1,027,997
EnLink Midstream Partners LP
4.400% 4/01/24		490,000		493,920
EQM Midstream Partners LP
4.750% 7/15/23		505,000		523,938
Plains All American Pipeline LP / PAA Finance Corp.
4.500% 12/15/26		90,000		98,732
Plains All American Pipeline LP/PAA Finance Corp.
4.650% 10/15/25		760,000		832,432
				2,977,019
Private Equity — 0.3%
Hercules Capital, Inc.
4.625% 10/23/22		610,000		620,991
Real Estate — 1.1%
Country Garden Holdings Co. Ltd.
8.000% 1/27/24 (a)		1,351,000		1,436,410
MAF Sukuk Ltd.
4.500% 11/03/25 (a)		625,000		683,875
				2,120,285
Real Estate Investment Trusts (REITS) — 2.2%
Host Hotels & Resorts LP
3.750% 10/15/23		950,000		1,005,303
SBA Tower Trust
1.884% 7/15/50 (a)		287,000		290,362
Service Properties Trust
4.350% 10/01/24		510,000		507,010
Tanger Properties LP
3.875% 12/01/23		610,000		639,518
Trust Fibra Uno
5.250% 1/30/26 (a)		680,000		751,400
VEREIT Operating Partnership LP
4.600% 2/06/24		570,000		623,576
4.625% 11/01/25		335,000		378,015
				4,195,184
Retail — 1.1%
Nordstrom, Inc.
2.300% 4/08/24 (a) (b)		226,000		226,359
O'Reilly Automotive, Inc.
3.850% 6/15/23		673,000		715,054
QVC, Inc.
4.375% 3/15/23		1,060,000		1,110,350
				2,051,763
Storage & Warehousing — 0.4%
GLP China Holdings Ltd.
4.974% 2/26/24 (a)		730,000		785,290

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

	Principal Amount		Value
Telecommunications — 2.4%
AT&T, Inc.
1.700% 3/25/26	$	935,000	$	934,741
Qwest Corp
6.750% 12/01/21		485,000		501,369
Sprint Communications, Inc.
9.250% 4/15/22		330,000		354,750
Telefonaktiebolaget LM Ericsson
4.125% 5/15/22		628,000		650,193
Tower Bersama Infrastructure Tbk PT
4.250% 1/21/25 (a)		1,445,000		1,517,252
Verizon Communications, Inc.
1.450% 3/20/26		485,000		485,094
				4,443,399
TOTAL CORPORATE DEBT (Cost $86,462,936)				88,097,777
Municipal Obligations — 0.2%
Louisiana State Public Facilities Authority, Revenue Bonds, Series 2011-A, Class A2, 3 mo. USD LIBOR
1.118% FRN 4/26/27		4,491		4,499
Pennsylvania Higher Education Assistance Agency, Revenue Bonds, Series 2006-2, Class B,
1.300% FRN 10/25/42 (c)		400,000		398,027
TOTAL MUNICIPAL OBLIGATIONS (Cost $398,991)				402,526
Non-U.S. Government Agency Obligations — 47.6%
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% 1.059% FRN 5/25/24 (a)		236,000		235,983
Series 2019-1, Class D, 1 mo. USD LIBOR + 1.450% 1.559% FRN 5/25/24 (a)		214,000		214,000
				449,983
Automobile Asset-Backed Securities — 8.7%
AmeriCredit Automobile Receivables Trust, Series 2020-1, Class D
1.800% 12/18/25		947,000		965,472
Avis Budget Rental Car Funding AESOP LLC
Series 2020-1A, Class C, 3.020% 8/20/26 (a)		1,259,000		1,289,633
Series 2019-3A, Class C, 3.150% 3/20/26 (a)		1,083,000		1,121,995
Series 2019-1A, Class C, 4.530% 3/20/23 (a)		233,000		238,409
Series 2018-1A, Class C, 4.730% 9/20/24 (a)		500,000		531,785
Canadian Pacer Auto Receivables Trust, Series 2018-2A, Class B
3.630% 1/19/24 (a)		180,000		182,496
Carmax Auto Owner Trust, Series 2019-4, Class D
2.800% 4/15/26		560,000		580,630
Carvana Auto Receivables Trust, Series 2019-4A, Class D
3.070% 7/15/25 (a)		719,000		746,501
Carvana Auto Receivables Trust 2021-N1
Series 2021-N1, Class C, 1.300% 1/10/28		1,660,000		1,659,255
Series 2021-N1, Class D, 1.500% 1/10/28		1,243,000		1,241,952
Drive Auto Receivables Trust, Series 2019-4, Class D
2.700% 2/16/27		550,000		567,133
Exeter Automobile Receivables Trust, Series 2019-3A, Class D
3.110% 8/15/25 (a)		400,000		414,126
Hertz Fleet Lease Funding LP, Series 2019-1, Class D
3.440% 1/10/33 (a)		649,000		650,077
Hertz Vehicle Financing II LP
Series 2019-3A, Class B, 3.030% 12/26/25 (a)		410,000		409,675
Series 2017-1A, Class B, 3.560% 10/25/21 (a)		910,000		906,254
Hertz Vehicle Financing LLC, Series 2018-3A, Class B
4.370% 7/25/24 (a)		330,000		329,936
Hertz Vehicle Financing LP, Series 2016-2A, Class C
4.990% 3/25/22 (a)		1,800,000		1,795,451
Santander Revolving Auto Loan Trust, Series 2019-A, Class D
3.450% 1/26/32 (a)		215,000		221,324
Tesla Auto Lease Trust, Series 2020-A, Class C
1.680% 2/20/24 (a)		456,000		460,381
Westlake Automobile Receivables Trust 2021-1, Series 2021-1A, Class D
1.230% 4/15/26 (a)		2,225,000		2,223,013
				16,535,498
Commercial Mortgage-Backed Securities — 4.5%
BAMLL Commercial Mortgage Securities Trust
Series 2018-DSNY, Class C, 1 mo. USD LIBOR + 1.350% 1.456% FRN 9/15/34 (a)		130,000		129,035
Series 2019-BPR, Class CMP, 3.895% VRN 11/05/32 (a) (c)		370,000		350,710
Series 2019-BPR, Class DMP, 3.895% VRN 11/05/32 (a) (c)		450,000		387,339
BHMS Mortgage Trust, Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500%
1.606% FRN 7/15/35 (a)		500,000		496,877

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

	Principal Amount		Value
BX Commercial Mortgage Trust
Series 2020-BXLP, Class D, 1 mo. USD LIBOR + 1.250% 1.356% FRN 12/15/36 (a)	$	648,685	$	648,078
Series 2020-BXLP, Class E, 1 mo. USD LIBOR + 1.600% 1.706% FRN 12/15/36 (a)		765,448		764,492
Series 2018-IND, Class E, 1 mo. USD LIBOR + 1.700% 1.806% FRN 11/15/35 (a)		728,000		728,000
Series 2019-XL, Class E, 1 mo. USD LIBOR + 1.800% 1.906% FRN 10/15/36 (a)		297,202		297,016
Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000% 2.106% FRN 10/15/36 (a)		833,293		832,513
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class E, 1 mo. USD LIBOR + 2.150%
2.256% FRN 12/15/37 (a)		545,194		545,193
Commercial Mortgage Trust, Series 2014-CR14, Class A2
3.147% 2/10/47		90,050		90,095
Credit Suisse Mortgage Capital Certificates, Series 2019-ICE4, Class D, 1 mo. USD LIBOR + 1.600%
1.706% FRN 5/15/36 (a)		200,000		200,125
Hudson Yards Mortgage Trust, Series 2019-30HY, Class E,
3.443% VRN 7/10/39 (a) (c)		700,000		699,879
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800%
1.906% FRN 5/15/36 (a)		251,000		250,922
Life 2021-BMR Mortgage Trust, Series 2021-BMR, Class E, 1 mo. USD LIBOR + 1.750%
1.856% FRN 3/15/38 (a)		372,000		372,595
Morgan Stanley Bank of America Merrill Lynch Trust, Series 2013-C7, Class B
3.769% 2/15/46		250,000		253,946
Morgan Stanley Capital I Trust, Series 2012-STAR, Class D,
3.927% VRN 8/05/34 (a) (c)		400,000		396,084
One New York Plaza Trust
Series 2020-1NYP, Class C, 1 mo. USD LIBOR + 2.200% 2.306% FRN 1/15/26 (a)		616,000		622,147
Series 2020-1NYP, Class D, 1 mo. USD LIBOR + 2.750% 2.856% FRN 1/15/26 (a)		414,000		418,131
				8,483,177
Home Equity Asset-Backed Securities — 0.0%
Credit Suisse Seasoned Loan Trust, Series 2006-1, Class A, 1 mo. USD LIBOR + .240%
0.349% FRN 10/25/34 (a)		48,061		47,694
Other Asset-Backed Securities — 20.5%
321 Henderson Receivables I LLC
Series 2006-1A, Class A1, 1 mo. USD LIBOR + .200% 0.306% FRN 3/15/41 (a)		22,147		21,929
Series 2010-3A, Class A 3.820% 12/15/48 (a)		145,977		155,960
Adams Outdoor Advertising LP, Series 2018-1, Class A
4.810% 11/15/48 (a)		379,306		406,298
Ares LV CLO Ltd., Series 2020-55A, Class A1, 3 mo. USD LIBOR + 1.700%
1.941% FRN 4/15/31 (a)		500,000		500,938
Bain Capital Credit CLO Ltd., Series 2020-2A, Class A, 3 mo. USD LIBOR + 1.850%
2.073% FRN 7/21/31 (a)		500,000		501,293
BlueMountain Fuji US CLO I Ltd., Series 2017-1A, Class A1R, 3 mo. USD LIBOR + .980%
1.170% FRN 7/20/29 (a)		550,000		550,001
BRE Grand Islander Timeshare Issuer LLC
Series 2017-1A, Class A, 2.940% 5/25/29 (a)		84,315		84,540
Series 2019-A, Class B, 3.780% 9/26/33 (a)		238,745		240,216
Business Jet Securities LLC
Series 2021-1A, Class A, 2.162% 4/15/36 (a)		960,000		957,077
Series 2020-1A, Class A, 2.981% 11/15/35 (a)		224,553		227,275
Capital Automotive REIT
Series 2017-1A, Class A1, 3.870% 4/15/47 (a)		238,426		238,821
Series 2017-1A, Class A2, 4.180% 4/15/47 (a)		596,064		633,395
CARS-DB4 LP, Series 2020-1A, Class B1
4.170% 2/15/50 (a)		484,000		509,596
Castlelake Aircraft Structured Trust, Series 2018-1, Class A
4.125% 6/15/43 (a)		264,757		265,290
Cbam CLO Management Cbam, Series 2018-6A, Class A1R, 3 mo. USD LIBOR + 1.270%
1.511% FRN 1/15/31 (a)		500,000		500,028
Cedar Funding IX CLO Ltd., Series 2018-9A, Class A1, 3 mo. USD LIBOR + .980%
1.204% FRN 4/20/31 (a)		250,000		250,001
CF Hippolyta LLC, Series 2020-1, Class B1
2.280% 7/15/60 (a)		96,392		97,979
DataBank Issuer, Series 2021-1A, Class A2
2.060% 2/27/51 (a)		991,000		989,018
DB Master Finance LLC
Series 2019-1A, Class A2I, 3.787% 5/20/49 (a)		271,860		276,603
Series 2019-1A, Class A2II, 4.021% 5/20/49 (a)		321,110		335,191
Diamond Resorts Owner Trust, Series 2018-1, Class A
3.700% 1/21/31 (a)		129,582		135,411
Domino's Pizza Master Issuer LLC, Series 2018-1A, Class A2I
4.116% 7/25/48 (a)		351,900		368,151
Elara HGV Timeshare Issuer LLC
Series 2017-A, Class A, 2.690% 3/25/30 (a)		92,016		94,776
Series 2016-A, Class A, 2.730% 4/25/28 (a)		163,523		162,636
Series 2017-A, Class B, 2.960% 3/25/30 (a)		272,639		267,973
Series 2014-A, Class B, 3.020% VRN 2/25/27 (a) (c)		16,721		16,706
Series 2019-A, Class C, 3.450% 1/25/34 (a)		563,586		550,643
Elmwood CLO II Ltd., Series 2019-2A, Class A, 3 mo. USD LIBOR + 1.450%
1.674% FRN 4/20/31 (a)		350,000		350,067
FCI Funding  LLC, Series 2019-1A, Class A
3.630% 2/18/31 (a)		61,084		61,986

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

	Principal Amount		Value
Flatiron CLO 17 Ltd., Series 2017-1A, Class AR, 3 mo. USD LIBOR + .980%
1.178% FRN 5/15/30 (a)	$	500,000	$	499,735
FNA VI LLC, Series 2021-1A, Class A
1.350% 1/10/32 (a)		2,013,343		2,010,038
Goodgreen Trust
Series 2019-2A, Class A, 2.760% 10/15/54 (a)		527,138		534,629
Series 2016-1A, Class A, 3.230% 10/15/52 (a)		262,424		267,176
Series 2019-1A, Class A, 3.860% 10/15/54 (a)		252,103		264,501
Series 2018-1A, Class A, 3.930% VRN 10/15/53 (a) (c)		228,038		245,090
Hero Funding Trust
Series 2017-3A, Class A1, 3.190% 9/20/48 (a)		150,497		157,272
Series 2016-4A, Class A1, 3.570% 9/20/47 (a)		149,656		155,828
Series 2015-1A, Class A, 3.840% 9/21/40 (a)		308,435		323,448
Series 2018-1A, Class A2, 4.670% 9/20/48 (a)		273,324		299,752
Hilton Grand Vacations Trust, Series 2017-AA, Class B
2.960% 12/26/28 (a)		101,431		102,478
HIN Timeshare Trust, Series 2020-A, Class B
2.230% 10/09/39 (a)		874,340		887,007
Horizon Aircraft Finance I Ltd., Series 2018-1, Class A
4.458% 12/15/38 (a)		523,988		530,173
Horizon Aircraft Finance III Ltd.
Series 2019-2, Class A, 3.425% 11/15/39 (a)		381,392		376,472
Series 2019-2, Class B, 4.458% 11/15/39 (a)		683,333		660,227
Kayne CLO, 3 mo. USD LIBOR + 1.400%
1.568% FRN 7/15/31 (a)		350,000		350,001
KDAC Aviation Finance Ltd., Series 2017-1A, Class A
4.212% 12/15/42 (a)		188,440		182,338
KKR CLO Ltd., Series 28A, Class A, 3 mo. USD LIBOR + 1.140%
1.324% FRN 3/15/31 (a)		250,000		250,010
KREF Ltd.
Series 2018-FL1, Class A, 1 mo. USD LIBOR + 1.100% 1.208% FRN 6/15/36 (a)		795,576		795,570
Series 2018-FL1, Class AS, 1 mo. USD LIBOR + 1.350% 1.458% FRN 6/15/36 (a)		1,150,000		1,149,277
Lendmark Funding Trust, Series 2018-1A, Class A
3.810% 12/21/26 (a)		350,000		356,429
Lunar Aircraft Ltd., Series 2020-1A, Class A
3.376% 2/15/45 (a)		167,779		164,416
MACH 1 Cayman Ltd., Series 2019-1, Class A
3.474% 10/15/39 (a)		336,392		338,392
Magnetite XXVI Ltd., Series 2020-26A, Class A, 3 mo. USD LIBOR + 1.750%
1.991% FRN 7/15/30 (a)		750,000		751,450
Marlette Funding Trust
Series 2019-2A, Class A, 3.130% 7/16/29 (a)		30,758		30,998
Series 2019-2A, Class B, 3.530% 7/16/29 (a)		146,000		149,002
Mosaic Solar Loans LLC, Series 2018-2GS, Class A
4.200% 2/22/44 (a)		205,758		223,653
Mosaic Solar Loans Trust, Series 2017-1A, Class A
4.450% 6/20/42 (a)		51,908		56,572
Neuberger Berman CLO Ltd., Series 2015-20A, Class BR, 3 mo. USD LIBOR + 1.250%
1.491% FRN 1/15/28 (a)		600,000		599,056
Neuberger Berman Loan Advisers CLO 25 Ltd., Series 2017-25A, Class BR, 3 mo. USD LIBOR + 1.350%
1.542% FRN 10/18/29 (a)		1,000,000		1,000,004
Newark BSL CLO 2 Ltd., Series 2017-1A, Class A2R, 3 mo. USD LIBOR + 1.400%
1.584% FRN 7/25/30 (a)		250,000		250,000
NP SPE II LLC
Series 2019-1A, Class A1, 2.574% 9/20/49 (a)		184,629		189,509
Series 2017-1A, Class A1, 3.372% 10/21/47 (a)		124,259		127,692
NRZ Advance Receivables Trust, Series 2020-T3, Class DT3
2.458% 10/15/52 (a)		411,000		411,009
Oak Street Investment Grade Net Lease Fund, Series 2020-1A, Class A3
2.260% 11/20/50 (a)		400,000		401,439
OneMain Financial Issuance Trust, Series 2019-2A, Class C
3.660% 10/14/36 (a)		600,000		626,263
Orange Lake Timeshare Trust
Series 2016-A, Class B, 2.910% 3/08/29 (a)		113,673		112,846
Series 2019-A, Class D, 4.930% 4/09/38 (a)		444,285		442,757
Oxford Finance Funding Trust, Series 2020-1A, Class A2
3.101% 2/15/28 (a)		281,000		287,264
Planet Fitness Master Issuer LLC, Series 2018-1A, Class A2I
4.262% 9/05/48 (a)		585,000		594,629
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850%
2.959% FRN 2/25/23 (a)		250,000		249,701
RAMP Trust, Series 2005-EFC1, Class M5, 1 mo. USD LIBOR + .650%
1.093% FRN 5/25/35		500,000		494,694
Rockford Tower CLO Ltd., Series 2017-3A, Class A, 3 mo. USD LIBOR + 1.190%
1.414% FRN 10/20/30 (a)		1,000,000		1,000,253
RR 3 Ltd., Series 2018-3A, Class A1R2, 3 mo. USD LIBOR + 1.090%
1.331% FRN 1/15/30 (a)		400,000		399,617
SBA Tower Trust, Series 2014-2A, Class C,
3.869% STEP 10/15/49 (a)		430,000		455,531

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

	Principal Amount		Value
Sierra Receivables Funding LLC
Series 2017-1A, Class A, 2.910% 3/20/34 (a)	$	124,650	$	126,546
Series 2019-3A, Class C, 3.000% 8/20/36 (a)		281,519		285,504
Series 2020-2A, Class C, 3.510% 7/20/37 (a)		93,029		95,796
Series 2018-1A, Class B, 4.036% 4/20/35		270,452		277,804
Series 2019-1A, Class D, 4.750% 1/20/36 (a)		227,342		234,385
SoFi Consumer Loan Program LLC, Series 2016-1A, Class A
3.260% 8/25/25 (a)		79,851		79,982
SoFi Consumer Loan Program Trust, Series 2019-3, Class D
3.890% 5/25/28 (a)		772,000		793,666
Stack Infrastructure Issuer LLC, Series 2020-1A, Class A2
1.893% 8/25/45 (a)		162,000		162,353
Store Master Funding I-VII, Series 2018-1A, Class A3
4.400% 10/20/48 (a)		512,633		527,806
Structured Asset Securities Corp. Mortgage Loan Trust, Series 2006-GEL1, Class M2, 1 mo. USD LIBOR + 1.200%
0.909% FRN 11/25/35 (a)		196,309		190,177
TAL Advantage VII LLC, Series 2020-1A, Class B
3.820% 9/20/45 (a)		852,750		867,284
TICP CLO XI Ltd., Series 2018-11A, Class A, 3 mo. USD LIBOR + 1.180%
1.404% FRN 10/20/31 (a)		400,000		400,017
TLF National Tax Lien Trust, Series 2017-1A, Class A
3.090% 12/15/29 (a)		29,068		29,252
Trafigura Securitisation Finance PLC
Series 2018-1A, Class A1, 1 mo. USD LIBOR + .730% 0.836% FRN 3/15/22 (a)		610,000		609,838
Series 2018-1A, Class B, 4.290% 3/15/22 (a)		920,000		921,173
Treman Park CLO Ltd., Series 2015-1A, Class ARR, 3 mo. USD LIBOR + 1.070%
1.294% FRN 10/20/28 (a)		915,644		916,121
Trinity Rail Leasing LP, Series 2019-1A, Class A
3.820% 4/17/49 (a)		625,108		638,916
Trip Rail Master Funding LLC
Series 2017-1A, Class A1, 2.709% 8/15/47 (a)		21,308		21,322
Series 2011-1A, Class A2, 6.024% 7/15/41 (a)		668,991		673,239
Vantage Data Centers LLC, Series 2020-1A, Class A2
1.645% 9/15/45 (a)		675,000		675,231
VSE VOI Mortgage LLC, Series 2018-A, Class C
4.020% 2/20/36 (a)		133,097		136,153
Welk Resorts LLC
Series 2015-AA, Class A, 2.790% 6/16/31 (a)		27,533		27,533
Series 2017-AA, Class B, 3.410% 6/15/33 (a)		94,788		93,654
Westgate Resorts LLC
Series 2017-1A, Class A, 3.050% 12/20/30 (a)		61,629		62,205
Series 2018-1A, Class A, 3.380% 12/20/31 (a)		148,543		150,647
Willis Engine Structured Trust IV, Series 2018-A, Class A,
4.750% STEP 9/15/43 (a)		218,849		217,619
				38,718,219
Student Loans Asset-Backed Securities — 6.6%
Access Group, Inc., Series 2015-1, Class B, 1 mo. USD LIBOR + 1.500%
1.609% FRN 7/25/58 (a)		140,000		128,030
College Ave Student Loans 2021-A LLC, Series 2021-A, Class B
2.320% 7/25/51 (a)		1,091,000		1,079,127
College Avenue Student Loans LLC
Series 2018-A, Class A1, 1 mo. USD LIBOR + 1.200% 1.309% FRN 12/26/47 (a)		390,287		392,619
Series 2017-A, Class A1, FRN, 1 mo. USD LIBOR + 1.650% 1.759% FRN 11/26/46 (a)		304,501		309,310
Series 2017-A, Class B, 4.500% 11/26/46 (a)		700,000		740,460
College Loan Corp. Trust I, Series 2005-2, Class B, 3 mo. USD LIBOR + .490%
0.731% FRN 1/15/37		155,356		139,199
Commonbond Student Loan Trust
Series 2018-AGS, Class C, 3.820% 2/25/44 (a)		31,054		30,348
Series 2018-BGS, Class C, 4.120% 9/25/45 (a)		35,466		35,033
Series 2018-CGS, Class C, 4.350% 2/25/46 (a)		18,192		17,781
Series 2017-AGS, Class C, 5.280% 5/25/41 (a)		65,114		66,787
Credit Suisse ABS Repackaging Trust, Series 2013-A, Class B
2.500% 1/25/30 (a)		51,661		51,807
Earnest Student Loan Program LLC, Series 2016-B, Class A1, 1 mo. USD LIBOR + 2.050%
2.159% FRN 2/26/35 (a)		40,783		38,723
ECMC Group Student Loan Trust, Series 2018-2A, Class A, 1 mo. USD LIBOR + .800%
0.909% FRN 9/25/68 (a)		384,460		385,244
EdLinc Student Loan Funding, Series 2017-A, Class A, PRIME - 1.150%
2.100% FRN 12/01/47 (a)		282,314		278,787
ELFI Graduate Loan Program LLC, Series 2018-A, Class B
4.000% 8/25/42 (a)		145,609		148,937
Higher Education Funding I, Series 2004-1, Class B1,
1.796% FRN 1/01/44 (a) (c)		950,000		846,888
Laurel Road Prime Student Loan Trust
Series 2019-A, Class BFX, 3.000% 10/25/48 (a)		256,646		251,584
Series 2017-B, Class CFX, 3.610% 8/25/42 (a)		172,101		160,558
Series 2018-B, Class BFX, 3.720% 5/26/43 (a)		191,151		189,940

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

	Principal Amount		Value
Navient Private Education Refi Loan Trust, Series 2020-BA, Class B
2.770% 1/15/69 (a)	$	2,200,000	$	2,255,292
Nelnet Private Education Loan Trust
Series 2016-A, Class A1A, 1 mo. USD LIBOR + 1.750% 1.859% FRN 12/26/40 (a)		72,194		72,492
Series 2016-A, Class A1B, 3.600% 12/26/40 (a)		51,986		52,232
Nelnet Student Loan Trust
Series 2007-2A, Class A4A2, 1.497% FRN 6/25/35 (a) (c)		600,000		593,869
Series 2014-1A, Class B, 1 mo. USD LIBOR + 1.500% 1.609% FRN 10/25/47 (a)		270,000		270,611
Series 2015-3A, Class B, 1 mo. USD LIBOR + 1.500% 1.609% FRN 6/25/54 (a)		130,000		130,358
SLC Student Loan Trust, Series 2005-1, Class B, 3 mo. USD LIBOR + .200%
0.398% FRN 2/15/45		282,236		263,072
SLM Student Loan Trust
Series 2006-2, Class R, 0.000% 1/25/41		1,396		861,441
Series 2006-7, Class B, 3 mo. USD LIBOR + .200% 0.418% FRN 1/27/42		848,319		772,154
Series 2006-5, Class B, 3 mo. USD LIBOR + .210% 0.428% FRN 10/25/40		340,287		314,082
Series 2005-6, Class B, 3 mo. USD LIBOR + .290% 0.508% FRN 1/25/44		460,892		424,733
Series 2003-14, Class A6, 3 mo. USD LIBOR + .300% 0.518% FRN 7/25/25		71,246		70,871
Series 2005-9, Class B, 3 mo. USD LIBOR + .300% 0.518% FRN 1/25/41		347,182		324,362
Series 2005-8, Class B, 3 mo. USD LIBOR + .310% 0.528% FRN 1/25/55		136,725		127,938
SMB Private Education Loan Trust
Series 2018-C, Class A2B, 1 mo. USD LIBOR + .750% 0.856% FRN 11/15/35 (a)		405,823		402,816
Series 2016-C, Class A2B, 1 mo. USD LIBOR + 1.100% 1.206% FRN 9/15/34 (a)		147,286		148,600
Series 2014-A, Class A2B, 1 mo. USD LIBOR + 1.150% 1.256% FRN 5/15/26 (a)		68,543		68,619
SoFi Professional Loan Program LLC
Series 2016-D, Class A1, 1 mo. USD LIBOR + .950% 1.059% FRN 1/25/39 (a)		22,881		22,972
Series 2016-B, Class A1, 1 mo. USD LIBOR + 1.200% 1.309% FRN 6/25/33 (a)		41,446		41,688
				12,509,364
Whole Loan Collateral Collateralized Mortgage Obligations — 7.1%
Angel Oak Mortgage Trust
Series 2020-5, Class A2, 1.579% VRN 5/25/65 (a) (c)		341,581		342,253
Series 2020-5, Class A3, 2.041% VRN 5/25/65 (a) (c)		307,883		310,703
Series 2018-3, Class A3, 3.238% VRN 5/25/59 (a) (c)		179,690		181,478
Series 2019-6, Class M1, 3.389% VRN 11/25/59 (a) (c)		800,000		807,720
Angel Oak Mortgage Trust 2021-1, Series 2021-1, Class M1,
2.215% VRN 1/25/66 (a) (c)		314,000		316,243
Bank of America Mortgage Securities, Series 2004-G, Class 2A7,
3.074% VRN 8/25/34  (c)		3,025		2,982
BRAVO Residential Funding Trust, Series 2020-NQM1, Class A3,
2.406% VRN 5/25/60 (a) (c)		319,255		323,254
CIM Trust, Series 2019-INV3, Class A11, 1 mo. USD LIBOR + 1.000%
1.068% FRN 8/25/49 (a)		837,680		839,246
Citigroup Mortgage Loan Trust
Series 2019-IMC1, Class A3, 3.030% VRN 7/25/49 (a) (c)		339,082		344,509
Series 2019-IMC1, Class M1, 3.170% VRN 7/25/49 (a) (c)		391,000		398,063
Credit Suisse Mortgage Trust Series 21-NQM2, Class A3,
1.538% VRN 2/25/66 (a) (c) (d)		1,100,000		1,099,985
Deephaven Residential Mortgage Trust
Series 2021-1, Class A3, 1.128% VRN 5/25/65 (a) (c)		473,586		471,113
Series 2019-4A, Class M1, 3.484% VRN 10/25/59 (a) (c)		550,000		554,901
Homeward Opportunities Fund I Trust, Series 2020-2, Class A1,
1.657% VRN 5/25/65 (a) (c)		335,469		337,419
JP Morgan Mortgage Trust
Series 2018-1, Class A5, 3.500% VRN 6/25/48 (a) (c)		16,088		16,109
Series 2018-3, Class A5, 3.500% VRN 9/25/48 (a) (c)		76,460		76,952
Series 2017-6, Class A5, 3.500% VRN 12/25/48 (a) (c)		26,902		26,952
New Residential Mortgage Loan Trust, Series 2016-4A, Class A1,
3.750% VRN 11/25/56 (a) (c)		196,147		205,495
OBX 2021-NQM1 Trust, Series 2021-NQM1, Class M1,
2.219% VRN 2/25/66 (a) (c)		333,000		333,000
Onslow Bay Financial LLC, Series 2020-INV1, Class A21,
3.500% VRN 12/25/49 (a) (c)		425,428		425,575
Sequoia Mortgage Trust
Series 2018-3, Class A4, 3.500% VRN 3/25/48 (a) (c)		46,891		46,999
Series 2018-CH1, Class A10, 4.000% VRN 2/25/48 (a) (c)		35,073		35,175
Series 2018-CH2, Class A12, 4.000% VRN 6/25/48 (a) (c)		67,500		67,722
Series 2018-CH3, Class A11, 4.000% VRN 8/25/48 (a) (c)		11,664		11,669
Shellpoint Co-Originator Trust, Series 2016-1, Class 2A3,
3.000% VRN 10/25/31 (a) (c)		358,746		361,829
STAR Trust, Series 2021-1, Class A3,
1.528% VRN 5/25/65 (a) (c)		1,740,000		1,740,578
Starwood Mortgage Residential Trust, Series 2019-INV1, Class A3,
2.916% VRN 9/27/49 (a) (c)		532,984		542,615
Verus Securitization Trust
Series 2020-1, Class M1, 3.021% VRN 1/25/60 (a) (c)		1,034,000		1,062,751
Series 2019-4, Class M1, 3.207% VRN 11/25/59 (a) (c)		430,000		435,140
Series 2019-INV2, Class A3, 3.219% VRN 7/25/59 (a) (c)		813,605		830,060
Series 2019-INV3, Class M1, 3.279% VRN 11/25/59 (a) (c)		265,000		272,492
Series 2020-4, Class M1, 3.291% VRN 5/25/65 (a) (c)		548,000		568,272
				13,389,254
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $89,229,066)				90,133,189

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

	Principal Amount		Value
U.S. Government Agency Obligations and Instrumentalities — 1.8%
Pass-Through Securities — 0.0%
Federal National Mortgage Association Pool #775539 12 mo. USD LIBOR + 1.641% 2.516% 5/01/34	$	2,554	$	2,650
Government National Mortgage Association
Pool #371146 7.000% 9/15/23		22		22
Pool #352022 7.000% 11/15/23		355		374
Pool #491089 7.000% 12/15/28		1,109		1,208
Pool #500928 7.000% 5/15/29		545		627
Pool #499410 7.000% 7/15/29		202		233
Pool #510083 7.000% 7/15/29		136		156
Pool #493723 7.000% 8/15/29		405		467
Pool #581417 7.000% 7/15/32		798		910
Government National Mortgage Association II
Pool #008746 1 year CMT + 1.500% 2.125% FRN 11/20/25		429		436
Pool #080136 1 year CMT + 1.500% 2.125% FRN 11/20/27		97		99
				7,182
Whole Loans — 1.8%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes
Series 2021-DNA2, Class M2, SOFR30A + 2.300% 2.317% FRN 8/25/33 (a)		955,000		955,383
Series 2020-DNA5, Class M2, SOFR30A + 2.800% 2.817% FRN 10/25/50 (a)		566,000		569,633
Series 2020-DNA3, Class M2, 1 mo. USD LIBOR + 3.000% 3.109% FRN 6/25/50 (a)		1,183,021		1,186,996
Federal National Mortgage Association Connecticut Avenue Securities Trust
Series 2019-R03, Class 1M2, 1 mo. USD LIBOR + 2.150% 2.259% FRN 9/25/31 (a)		279,450		280,075
Series 2019-R02, Class 1M2, 1 mo. USD LIBOR + 2.300% 2.409% FRN 8/25/31 (a)		360,744		360,981
				3,353,068
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $3,354,826)				3,360,250
U.S. Treasury Obligations — 0.7%
U.S. Treasury Bonds & Notes — 0.7%
U.S. Treasury Note
8.000% 11/15/21 (e)		1,220,000		1,280,118
TOTAL U.S. TREASURY OBLIGATIONS (Cost $1,395,661)				1,280,118
TOTAL BONDS & NOTES (Cost $180,841,480)				183,273,860
TOTAL PURCHASED OPTIONS (#) — 0.1% (Cost $147,532)				138,323
TOTAL LONG-TERM INVESTMENTS (Cost $180,989,012)				183,412,183
Short-Term Investments — 2.0%
Commercial Paper — 1.6%
E.I. du Point Nemours & Co.
0.233% 5/17/21 (a)		1,000,000		999,728
Entergy Corp.
0.233% 5/18/21 (a)		2,000,000		1,999,355
				2,999,083
Repurchase Agreement — 0.4%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/21, 0.000%, due 4/01/21 (f)		800,049		800,049
TOTAL SHORT-TERM INVESTMENTS (Cost $3,799,155)				3,799,132
TOTAL INVESTMENTS — 99.0% (Cost $184,788,167) (g)				187,211,315
Other Assets/(Liabilities) — 1.0%				1,843,567
NET ASSETS — 100.0%			$	189,054,882

Abbreviation Legend

CLO	Collateralized Loan Obligation
FRN	Floating Rate Note
STEP	Step Up Bond
VRN	Variable Rate Note

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

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 March 31, 2021, the aggregate market value of these securities amounted to $121,587,614 or 64.31% of net assets.
(b)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.
(c)	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 March 31, 2021.
(d)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At March 31, 2021, these securities amounted to a value of $1,099,985 or 0.58% of net assets.
(e)	A portion of this security is pledged/held as collateral for open derivatives.
(f)	Maturity value of $800,049. Collateralized by U.S. Government Agency obligations with a rate of 1.750%, maturity date of 12/31/24, and an aggregate market value, including accrued interest, of $816,102.
(g)	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)

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

$

138,323

$

147,532

$

(9,209

)

Futures contracts 

	Expiration Date	Number of Contracts	Notional Amount			Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Note 10 Year	6/21/21	152	$	20,418,361		$	(515,861	)
Short
U.S. Treasury Ultra 10 Year	6/21/21	54	$	(8,036,970	)	$	277,845
U.S. Treasury Note 2 Year	6/30/21	123		(27,167,671	)		18,304
U.S. Treasury Note 5 Year	6/30/21	603		(75,270,655	)		861,397
90 Day Eurodollar	9/13/21	3		(731,728	)		(16,847	)
90 Day Eurodollar	3/14/22	3		(731,503	)		(16,735	)
90 Day Eurodollar	9/19/22	3		(731,203	)		(16,022	)
90 Day Eurodollar	3/13/23	2		(487,168	)		(9,807	)
90 Day Eurodollar	12/18/23	3		(730,078	)		(10,885	)
90 Day Eurodollar	12/16/24	7		(1,701,414	)		(15,861	)
						$	1,071,389

Currency Legend
USD	U.S. Dollar

MML Small Cap Equity Fund —  Portfolio of Investments

March 31, 2021 (Unaudited)

	Number of Shares		Value
Equities — 99.6%
Common Stock — 99.6%
Basic Materials — 2.8%
Chemicals — 0.5%
Diversey Holdings Ltd. (a)		49,541	$	728,748
Mining — 2.3%
Compass Minerals International, Inc.		23,834		1,494,869
Kaiser Aluminum Corp.		15,628		1,726,894
				3,221,763
				3,950,511
Communications — 2.8%
Internet — 2.3%
Overstock.com, Inc. (a)		23,599		1,563,670
Q2 Holdings, Inc. (a) (b)		17,286		1,732,057
				3,295,727
Telecommunications — 0.5%
EchoStar Corp. Class A (a)		29,820		715,680
				4,011,407
Consumer, Cyclical — 13.4%
Apparel — 0.5%
Carter's, Inc.		7,582		674,267
Auto Parts & Equipment — 3.1%
Allison Transmission Holdings, Inc.		18,943		773,443
Dorman Products, Inc. (a)		17,157		1,760,995
Visteon Corp. (a)		16,114		1,965,102
				4,499,540
Entertainment — 0.7%
Cedar Fair LP (c)		20,706		1,028,674
Retail — 9.1%
AutoNation, Inc. (a)		34,502		3,216,276
BJ's Wholesale Club Holdings, Inc. (a)		43,867		1,967,874
Denny's Corp. (a)		88,605		1,604,637
Foot Locker, Inc.		16,052		902,925
Jack in the Box, Inc.		16,632		1,825,861
Suburban Propane Partners LP (c)		100,014		1,482,207
Texas Roadhouse, Inc.		20,981		2,012,917
				13,012,697
				19,215,178
Consumer, Non-cyclical — 25.1%
Biotechnology — 4.0%
ADC Therapeutics SA (a) (b)		10,597		258,673
Avid Bioservices, Inc. (a)		25,960		473,251
Axsome Therapeutics, Inc. (a) (b)		5,655		320,186
Emergent BioSolutions, Inc. (a)		20,452		1,900,195
NeoGenomics, Inc. (a)		27,525		1,327,531
Twist Bioscience Corp. (a)		8,653		1,071,760
Zai Lab Ltd. ADR (a)		3,297		439,919
				5,791,515
Commercial Services — 6.2%
ASGN, Inc. (a)		32,632		3,114,398
Korn Ferry		49,173		3,066,920
Monro, Inc.		33,113		2,178,835
Paya Holdings, Inc. Class A (a)		52,905		579,839
				8,939,992
Food — 2.4%
BellRing Brands, Inc. Class A (a)		64,625		1,525,796
The Simply Good Foods Co. (a)		64,332		1,956,980
				3,482,776
Health Care – Products — 6.1%
Adaptive Biotechnologies Corp. (a)		13,690		551,159
AtriCure, Inc. (a)		25,355		1,661,260
BioLife Solutions, Inc. (a)		18,768		675,648
Inspire Medical Systems, Inc. (a)		8,708		1,802,469
iRhythm Technologies, Inc. (a)		4,971		690,273
OraSure Technologies, Inc. (a) (b)		59,619		695,754
Repligen Corp. (a)		4,881		948,915
Tandem Diabetes Care, Inc. (a)		18,640		1,644,980
				8,670,458
Health Care – Services — 4.6%
Addus HomeCare Corp. (a)		17,660		1,847,059
LHC Group, Inc. (a)		11,150		2,131,991
Ortho Clinical Diagnostics Holdings PLC Class H (a)		35,717		689,160
Tenet Healthcare Corp. (a)		35,754		1,859,208
				6,527,418
Household Products & Wares — 1.3%
Acco Brands Corp.		226,316		1,910,107

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

	Number of Shares		Value
Pharmaceuticals — 0.5%
Collegium Pharmaceutical, Inc. (a)		31,113	$	737,378
				36,059,644
Energy — 1.5%
Oil & Gas — 1.0%
CNX Resources Corp. (a)		95,304		1,400,969
Pipelines — 0.5%
Noble Midstream Partners LP (c)		49,742		721,259
				2,122,228
Financial — 19.4%
Banks — 5.6%
The Bank of NT Butterfield & Son Ltd.		46,028		1,759,190
BankUnited, Inc.		40,946		1,799,577
Cathay General Bancorp		34,018		1,387,254
Heritage Financial Corp. (b)		41,236		1,164,505
Signature Bank		5,354		1,210,539
Silvergate Capital Corp. Class A (a)		5,055		718,669
				8,039,734
Diversified Financial Services — 3.7%
Federated Hermes, Inc.		39,874		1,248,056
Focus Financial Partners, Inc. Class A (a)		40,411		1,681,906
Stifel Financial Corp.		37,579		2,407,311
				5,337,273
Real Estate Investment Trusts (REITS) — 4.3%
DiamondRock Hospitality Co. (a)		136,033		1,401,140
EPR Properties		27,814		1,295,854
Four Corners Property Trust, Inc.		72,665		1,991,021
National Storage Affiliates Trust		36,058		1,439,796
				6,127,811
Savings & Loans — 5.8%
Berkshire Hills Bancorp, Inc.		34,969		780,508
OceanFirst Financial Corp.		50,095		1,199,274
Pacific Premier Bancorp, Inc.		42,622		1,851,500
Sterling Bancorp		79,699		1,834,671
WSFS Financial Corp.		54,646		2,720,825
				8,386,778
				27,891,596
Industrial — 17.5%
Building Materials — 2.2%
Masonite International Corp. (a)		13,980		1,611,055
Summit Materials, Inc. Class A (a)		57,728		1,617,539
				3,228,594
Electrical Components & Equipment — 1.9%
Energizer Holdings, Inc.		28,743		1,364,143
EnerSys		14,498		1,316,418
				2,680,561
Electronics — 1.6%
Atkore ,Inc. (a)		31,377		2,256,006
Engineering & Construction — 3.5%
Comfort Systems USA, Inc.		12,315		920,793
KBR, Inc.		57,381		2,202,857
TopBuild Corp. (a)		9,050		1,895,341
				5,018,991
Environmental Controls — 0.4%
US Ecology, Inc. (a)		15,372		640,090
Machinery – Diversified — 1.4%
Chart Industries, Inc. (a)		8,587		1,222,359
Curtiss-Wright Corp.		6,498		770,663
				1,993,022
Metal Fabricate & Hardware — 3.0%
Rexnord Corp.		66,689		3,140,385
Valmont Industries, Inc.		4,926		1,170,763
				4,311,148
Miscellaneous - Manufacturing — 1.1%
EnPro Industries, Inc.		18,912		1,612,626
Packaging & Containers — 0.8%
Silgan Holdings, Inc.		25,747		1,082,146
Transportation — 1.6%
CryoPort, Inc. (a) (b)		25,841		1,343,990
Hub Group, Inc. Class A (a)		13,713		922,611
				2,266,601
				25,089,785
Technology — 12.5%
Computers — 2.5%
CACI International, Inc. Class A (a)		7,130		1,758,686
Perspecta, Inc.		63,086		1,832,648
				3,591,334

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

	Number of Shares		Value
Semiconductors — 4.6%
Allegro MicroSystems, Inc. (a)		29,240	$	741,234
Brooks Automation, Inc.		26,901		2,196,467
MKS Instruments, Inc.		10,593		1,964,154
Semtech Corp. (a)		24,184		1,668,696
				6,570,551
Software — 5.4%
1Life Healthcare, Inc. (a)		23,233		907,946
Bottomline Technologies de, Inc. (a)		37,421		1,693,300
Envestnet, Inc. (a)		11,645		841,118
Everbridge, Inc. (a)		5,060		613,171
j2 Global, Inc. (a)		25,240		3,025,266
Olo, Inc. Class A (a)		24,744		652,994
				7,733,795
				17,895,680
Utilities — 4.6%
Electric — 2.6%
Avista Corp.		44,544		2,126,976
Evoqua Water Technologies Corp. (a)		62,701		1,649,036
				3,776,012
Gas — 2.0%
National Fuel Gas Co.		38,611		1,930,164
Northwest Natural Holding Co.		17,230		929,559
				2,859,723
				6,635,735
TOTAL COMMON STOCK (Cost $93,484,604)				142,871,764
TOTAL EQUITIES (Cost $93,484,604)				142,871,764
Mutual Funds — 0.2%
Diversified Financial Services — 0.2%
State Street Navigator Securities Lending Prime Portfolio (d)		214,577		214,577
TOTAL MUTUAL FUNDS (Cost $214,577)				214,577
TOTAL LONG-TERM INVESTMENTS (Cost $93,699,181)				143,086,341
	Principal Amount
Short-Term Investments — 0.6%
Repurchase Agreement — 0.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/21, 0.000%, due 4/01/21 (e)	$	847,426		847,426
TOTAL SHORT-TERM INVESTMENTS (Cost $847,426)				847,426
TOTAL INVESTMENTS — 100.4% (Cost $94,546,607) (f)				143,933,767
Other Assets/(Liabilities) — (0.4)%				(529,957	)
NET ASSETS — 100.0%			$	143,403,810

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 March 31, 2021, was $3,300,955 or 2.30% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $3,159,396 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)	Represents investment of security lending cash collateral. (Note 2).
(e)	Maturity value of $847,426. Collateralized by U.S. Government Agency obligations with a rate of 1.750%, maturity date of 12/31/24, and an aggregate market value, including accrued interest, of $864,441.
(f)	See Note 3 for aggregate cost for federal tax purposes.

MML Special Situations Fund —  Portfolio of Investments

March 31, 2021 (Unaudited)

	Number of Shares		Value
Equities — 100.0%
Common Stock — 100.0%
Basic Materials — 8.0%
Chemicals — 7.2%
Dow, Inc.		41,295	$	2,640,401
Ingevity Corp. (a)		2,250		169,943
				2,810,344
Mining — 0.8%
Alcoa Corp. (a)		10,338		335,882
				3,146,226
Communications — 26.9%
Internet — 25.8%
Airbnb, Inc. Class A (a)		4,080		766,795
Bumble, Inc. (a)		2,817		175,724
Chewy, Inc. Class A (a) (b)		4,219		357,392
DoorDash, Inc., Class A (a)		1,907		250,065
Lyft, Inc. Class A (a)		14,185		896,208
Pinterest, Inc. Class A (a)		29,501		2,183,959
Snap, Inc. Class A (a)		51,379		2,686,608
Uber Technologies, Inc. (a)		51,313		2,797,072
				10,113,823
Media — 1.1%
Altice USA, Inc. Class A (a)		13,517		439,708
				10,553,531
Consumer, Cyclical — 7.2%
Apparel — 0.3%
Kontoor Brands, Inc.		2,611		126,712
Auto Parts & Equipment — 0.9%
Adient PLC (a)		5,220		230,724
Veoneer, Inc. (a) (b)		5,205		127,418
				358,142
Distribution & Wholesale — 1.6%
IAA, Inc. (a)		7,450		410,793
Resideo Technologies, Inc. (a)		7,945		224,446
				635,239
Entertainment — 2.8%
Madison Square Garden Entertainment Corp. (a)		980		80,164
Penn National Gaming, Inc. (a)		8,234		863,253
Warner Music Group Corp. Class A		4,936		169,453
				1,112,870
Lodging — 1.4%
Hilton Grand Vacations, Inc. (a)		4,731		177,365
Wyndham Hotels & Resorts, Inc.		5,157		359,856
				537,221
Retail — 0.2%
Petco Health & Wellness Co., Inc. (a)		2,765		61,272
				2,831,456
Consumer, Non-cyclical — 14.9%
Biotechnology — 5.8%
Corteva, Inc.		41,227		1,922,003
Maravai LifeSciences Holdings, Inc. (a)		3,541		126,201
Royalty Pharma PLC Class A (b)		4,740		206,759
				2,254,963
Commercial Services — 0.4%
Affirm Holdings, Inc. (a)		1,801		127,366
Driven Brands Holdings, Inc. (a)		1,766		44,892
				172,258
Food — 2.8%
Lamb Weston Holdings, Inc.		8,106		628,053
US Foods Holding Corp. (a)		12,245		466,779
				1,094,832
Health Care – Products — 2.2%
Avantor, Inc. (a)		28,630		828,266
Varex Imaging Corp. (a)		2,176		44,586
				872,852
Health Care – Services — 1.1%
Ortho Clinical Diagnostics Holdings PLC Class H (a)		4,416		85,207
PPD, Inc. (a)		6,028		228,100
Sotera Health Co. (a)		3,995		99,715
				413,022
Household Products & Wares — 0.2%
Reynolds Consumer Products, Inc.		3,026		90,114
Pharmaceuticals — 2.4%
Covetrus, Inc. (a)		5,520		165,434
Elanco Animal Health, Inc. (a)		26,152		770,177
				935,611
				5,833,652

MML Special Situations Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Energy — 1.9%
Energy – Alternate Sources — 0.8%
Array Technologies, Inc. (a)		6,049	$	180,381
Shoals Technologies Group, Inc. Class A (a)		4,413		153,484
				333,865
Oil & Gas Services — 0.6%
ChampionX Corp. (a)		10,348		224,862
Pipelines — 0.5%
Equitrans Midstream Corp.		22,641		184,751
				743,478
Financial — 11.8%
Diversified Financial Services — 1.5%
Rocket Cos., Inc. Class A (b)		6,404		147,868
Tradeweb Markets, Inc. Class A		5,630		416,620
				564,488
Insurance — 3.3%
Athene Holding Ltd. Class A (a)		6,892		347,357
Brighthouse Financial, Inc. (a)		4,850		214,612
Equitable Holdings, Inc.		21,711		708,213
				1,270,182
Real Estate — 0.2%
Newmark Group, Inc. Class A		8,997		90,015
Real Estate Investment Trusts (REITS) — 6.8%
Apartment Income REIT Corp.		8,240		352,342
Invitation Homes, Inc.		31,417		1,005,030
JBG SMITH Properties		6,136		195,064
Park Hotels & Resorts, Inc.		13,121		283,151
VICI Properties, Inc. (b)		29,724		839,406
				2,674,993
				4,599,678
Industrial — 15.4%
Building Materials — 5.6%
The AZEK Co., Inc (a)		6,957		292,542
Carrier Global Corp.		45,270		1,911,299
				2,203,841
Electronics — 4.8%
Fortive Corp.		18,730		1,323,087
nVent Electric PLC		9,335		260,540
Vontier Corp. (a)		9,356		283,206
				1,866,833
Engineering & Construction — 1.1%
Arcosa, Inc.		2,674		174,051
frontdoor, Inc. (a)		4,747		255,151
				429,202
Machinery – Diversified — 3.9%
Otis Worldwide Corp.		22,584		1,545,875
				6,045,751
Technology — 13.9%
Computers — 0.6%
Perspecta, Inc.		7,600		220,780
Software — 13.3%
Avaya Holdings Corp. (a)		4,191		117,474
C3.ai, Inc. (a) (b)		919		60,571
Concentrix Corp. (a)		2,308		345,554
Dropbox, Inc. Class A (a)		16,407		437,410
Oscar Health, Inc. (a)		2,052		55,158
Playtika Holding Corp. (a)		3,865		105,167
Qualtrics International Inc (a)		3,125		102,844
ROBLOX Corp. (a)		2,190		141,978
Snowflake, Inc. Class A (a)		3,292		754,790
Zoom Video Communications, Inc. Class A (a)		8,808		2,829,922
ZoomInfo Technologies, Inc. Class A (a) (b)		5,186		253,595
				5,204,463
				5,425,243
TOTAL COMMON STOCK (Cost $32,697,116)				39,179,015
TOTAL EQUITIES (Cost $32,697,116)				39,179,015
Mutual Funds — 1.4%
Diversified Financial Services — 1.4%
State Street Navigator Securities Lending Prime Portfolio (c)		551,154		551,154
TOTAL MUTUAL FUNDS (Cost $551,154)				551,154
TOTAL LONG-TERM INVESTMENTS (Cost $33,248,270)				39,730,169
TOTAL INVESTMENTS — 101.4% (Cost $33,248,270) (d)				39,730,169
Other Assets/(Liabilities) — (1.4)%				(551,114	)
NET ASSETS — 100.0%			$	39,179,055

MML Special Situations Fund —  Portfolio of Investments (Continued)

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 March 31, 2021, was $1,725,929 or 4.41% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $1,210,795 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)	See Note 3 for aggregate cost for federal tax purposes.

MML Strategic Emerging Markets Fund —  Portfolio of Investments

March 31, 2021 (Unaudited)

	Number of Shares		Value
Equities — 98.4%
Common Stock — 94.7%
Bermuda — 1.1%
Credicorp Ltd.		4,845	$	661,681
Jardine Strategic Holdings Ltd. (a)		15,289		505,937
				1,167,618
Brazil — 3.6%
Ambev SA		179,913		488,727
B3 SA - Brasil Bolsa Balcao		90,953		882,601
Vale SA Sponsored ADR		144,298		2,507,899
				3,879,227
Cayman Islands — 26.8%
Alibaba Group Holding Ltd. (b)		1,000		28,298
Alibaba Group Holding Ltd. Sponsored ADR (b)		13,395		3,037,048
Baidu, Inc. Sponsored ADR (b)		1,308		284,555
BeiGene Ltd. (b)		3,507		1,220,716
Blue Moon Group Holdings Ltd. (b) (c)		121,432		174,637
Budweiser Brewing Co. APAC Ltd. (c)		224,000		669,472
Hansoh Pharmaceutical Group Co. Ltd. (b) (c)		40,000		191,892
Huazhu Group Ltd. ADR (a) (b)		69,494		3,815,221
Innovent Biologics, Inc. (b) (c)		47,000		479,810
JD.com, Inc. ADR (b)		10,403		877,285
Kuaishou Technology (b) (c)		30,500		1,059,287
Meituan Class B  (b) (c)		41,700		1,606,462
NetEase, Inc. ADR		11,680		1,206,077
New Horizon Health Ltd. (b) (c)		24,000		179,365
New Oriental Education & Technology Group, Inc. Sponsored ADR (b)		75,554		1,057,756
OneConnect Financial Technology Co. Ltd. (b)		36,016		532,316
Pagseguro Digital Ltd. Class A (b)		8,040		372,252
Pinduoduo, Inc. ADR  (b)		7,622		1,020,433
TAL Education Group Sponsored ADR (b)		3,231		173,989
Tencent Holdings Ltd.		90,509		7,135,456
Tencent Music Entertainment Group ADR (b)		10,508		215,309
Wuxi Biologics Cayman, Inc. (b) (c)		117,500		1,482,147
ZTO Express Cayman, Inc. (b)		4,937		140,348
ZTO Express Cayman, Inc. ADR		73,787		2,150,891
				29,111,022
Chile — 0.9%
Falabella SA		210,511		956,078
China — 4.0%
Contemporary Amperex Technology Co. Ltd. Class A		2,300		113,668
Gree Electric Appliances, Inc. of Zhuhai Class A		45,100		431,573
Jiangsu Hengrui Medicine Co. Ltd. Class A		87,987		1,239,174
Ping An Insurance Group Co. of China Ltd. Class A		197,462		2,375,137
Remegen Co. Ltd. (b) (c)		11,159		139,300
				4,298,852
Colombia — 0.3%
Grupo Aval Acciones y Valores SA (a)		61,175		380,509
Egypt — 0.6%
Commercial International Bank Egypt SAE		179,534		662,508
France — 5.0%
Kering SA		6,090		4,204,912
LVMH Moet Hennessy Louis Vuitton SE		72		47,980
Pernod Ricard SA		6,366		1,195,036
				5,447,928
Hong Kong — 3.7%
AIA Group Ltd.		333,400		4,055,978
India — 14.1%
Godrej Properties Ltd. (b)		14,057		270,597
Havells India Ltd.		7,132		102,994
HDFC Bank Ltd. (b)		28,894		588,315
Housing Development Finance Corp. Ltd.		153,663		5,282,149
Infosys Ltd.		75,383		1,413,221
Kotak Mahindra Bank Ltd. (b)		146,881		3,536,583
Oberoi Realty Ltd. (b)		56,994		453,212
Tata Consultancy Services Ltd.		64,358		2,798,971
Zee Entertainment Enterprises Ltd.		315,798		877,105
				15,323,147
Indonesia — 1.0%
Bank Central Asia Tbk PT		339,100		726,766
Bank Rakyat Indonesia Persero Tbk PT		179,100		54,350
Indocement Tunggal Prakarsa Tbk PT		233,997		197,575
Semen Indonesia Persero Tbk PT		205,600		147,950
				1,126,641
Italy — 1.5%
Moncler SpA (b)		2,960		170,033
PRADA SpA (b)		235,000		1,469,347
				1,639,380
Luxembourg — 0.2%
InPost SA (b)		12,339		202,085
Mexico — 5.8%
Alsea SAB de CV (b)		162,774		240,663
Fomento Economico Mexicano SAB de CV		210,318		1,584,626
Fomento Economico Mexicano SAB de CV Sponsored ADR		4,791		360,906
Grupo Aeroportuario del Sureste SAB de CV Class B (b)		27,159		482,337
Grupo Mexico SAB de CV Series B		502,867		2,650,696
Wal-Mart de Mexico SAB de CV		328,444		1,037,259
				6,356,487

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

	Number of Shares		Value
Netherlands — 2.9%
Yandex NV Class A (b)		49,301	$	3,158,222
Philippines — 2.2%
Ayala Land, Inc.		1,052,300		744,683
SM Investments Corp.		61,830		1,223,859
SM Prime Holdings, Inc.		545,012		393,150
				2,361,692
Republic of Korea — 2.0%
Samsung Biologics Co. Ltd. (b) (c)		2,350		1,557,921
Samsung Electronics Co. Ltd.		9,035		652,608
				2,210,529
Russia — 4.8%
Novatek PJSC Sponsored GDR Registered (c)		104		20,540
Novatek PJSC Sponsored GDR Registered (c)		21,085		4,166,336
Polyus PJSC (b)		2,934		540,856
Polyus PJSC GDR (c) (d)		2,690		247,615
Polyus PJSC GDR (c) (d)		194		17,858
Sberbank of Russia PJSC		58,631		225,553
				5,218,758
South Africa — 0.6%
FirstRand Ltd. (a)		184,563		645,019
Switzerland — 1.8%
Cie Financiere Richemont SA Registered		20,047		1,925,029
Taiwan — 7.8%
Taiwan Semiconductor Manufacturing Co. Ltd.		405,000		8,421,333
Turkey — 0.3%
Akbank TAS		524,278		297,362
United Kingdom — 0.4%
Prudential PLC		19,913		422,146
United States — 3.3%
Yum China Holdings, Inc.		59,922		3,547,982
TOTAL COMMON STOCK (Cost $79,752,454)				102,815,532
Preferred Stock — 3.7%
Brazil — 1.7%
Banco Bradesco SA 3.340%		129,100		614,003
Lojas Americanas SA 0.640%		304,422		1,209,327
				1,823,330
India — 0.0%
Zee Entertainment Enterprises Ltd. 6.000%		503,840		13,093
Singapore — 2.0%
Grab Holdings, Inc. (Acquired 6/18/19, Cost $2,160,355) (b) (d) (e) (f)		350,542		2,160,355
TOTAL PREFERRED STOCK (Cost $4,377,540)				3,996,778
TOTAL EQUITIES (Cost $84,129,994)				106,812,310
Mutual Funds — 0.3%
United States — 0.3%
State Street Navigator Securities Lending Prime Portfolio (g)		383,585		383,585
TOTAL MUTUAL FUNDS (Cost $383,585)				383,585
Warrants — 0.0%
Switzerland — 0.0%
Cie Financiere Richemont SA, Expires 11/22/23, Strike 67.00 (b)		48,648		18,529
TOTAL WARRANTS (Cost $0)				18,529
TOTAL LONG-TERM INVESTMENTS (Cost $84,513,579)				107,214,424

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

	Principal Amount		Value
Short-Term Investments — 0.3%
Repurchase Agreement — 0.3%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/21, 0.000%, due 4/01/21 (h)	$	302,018	$	302,018
TOTAL SHORT-TERM INVESTMENTS (Cost $302,018)				302,018
TOTAL INVESTMENTS — 99.0% (Cost $84,815,597) (i)				107,516,442
Other Assets/(Liabilities) — 1.0%				1,089,371
NET ASSETS — 100.0%			$	108,605,813

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 March 31, 2021, was $4,236,463 or 3.90% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $3,984,298 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 March 31, 2021, the aggregate market value of these securities amounted to $11,992,642 or 11.04% of net assets.
(d)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At March 31, 2021, these securities amounted to a value of $2,425,828 or 2.23% of net assets.
(e)	Investment was valued using significant unobservable inputs.
(f)	Restricted security. Certain securities are restricted as to resale. At March 31, 2021, these securities amounted to a value of $2,160,355 or 1.99% 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 $302,018. Collateralized by U.S. Government Agency obligations with a rate of 1.750%, maturity date of 12/31/24, and an aggregate market value, including accrued interest, of $308,070.
(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 Blend Fund (“Blend Fund”)

MML Dynamic Bond Fund ("Dynamic Bond Fund")

MML Equity Fund (“Equity Fund”)

MML Equity Momentum Fund ("Equity Momentum 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.

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 Blend Fund, Equity Momentum Fund, 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 March 31, 2021. 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 March 31, 2021, for the remaining Funds' investments:

Dynamic Bond Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Bank Loans (less Unfunded Loan Commitments)	$	—	$	11,868,591	$	—	$	11,868,591
Corporate Debt		—		76,371,983		—		76,371,983
Municipal Obligations		—		460,152		—		460,152
Non-U.S. Government Agency Obligations		—		84,810,108		—		84,810,108
Sovereign Debt Obligations		—		7,413,026		—		7,413,026
U.S. Government Agency Obligations and Instrumentalities		—		46,833,043		—		46,833,043
U.S. Treasury Obligations		—		72,481,482		—		72,481,482
Short-Term Investments		—		9,362,923		—		9,362,923
Unfunded Loan Commitments**		—		217		—		217
Total Investments	$	—	$	309,601,525	$	—	$	309,601,525

Notes to Portfolio of Investments (Unaudited) (Continued)

Equity Fund

Asset Investments	Level 1		Level 2			Level 3		Total
Common Stock	$	856,789,518	$	839,557	*	$	—	$	857,629,075
Preferred Stock		1,145,447		—			—		1,145,447
Mutual Funds		8,207,886		—			—		8,207,886
Short-Term Investments		318,297		2,106,874			—		2,425,171
Total Investments	$	866,461,148	$	2,946,431		$	—	$	869,407,579

Notes to Portfolio of Investments (Unaudited) (Continued)

High Yield Fund

Asset Investments	Level 1		Level 2			Level 3		Total
Common Stock	$	861,553	$	—	+	$	155,869	$	1,017,422
Bank Loans		—		12,304,493			—		12,304,493
Corporate Debt		—		79,755,874			—		79,755,874
Short-Term Investments		—		2,711,288			—		2,711,288
Total Investments	$	861,553	$	94,771,655		$	155,869	$	95,789,077

Notes to Portfolio of Investments (Unaudited) (Continued)

Inflation-Protected and Income Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Corporate Debt	$	—		$	1,502,631		$	—	$	1,502,631
Municipal Obligations		—			10,655			—		10,655
Non-U.S. Government Agency Obligations		—			181,723,635			—		181,723,635
U.S. Government Agency Obligations and Instrumentalities		—			30,575,971			—		30,575,971
U.S. Treasury Obligations		—			74,627,753			—		74,627,753
Purchased Options		—			1,816,671			—		1,816,671
Short-Term Investments		—			48,346,832			—		48,346,832
Total Investments	$	—		$	338,604,148		$	—	$	338,604,148
Asset Derivatives
Futures Contracts	$	111,794		$	—		$	—	$	111,794
Swap Agreements		—			620,488			—		620,488
Total	$	111,794		$	620,488		$	—	$	732,282
Liability Derivatives
Futures Contracts	$	(206,142	)	$	—		$	—	$	(206,142	)
Swap Agreements		—			(2,002,261	)		—		(2,002,261	)
Total	$	(206,142	)	$	(2,002,261	)	$	—	$	(2,208,403	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Managed Bond Fund

Asset Investments	Level 1			Level 2		Level 3		Total
Corporate Debt	$	—		$	375,316,081	$	—	$	375,316,081
Municipal Obligations		—			2,353,962		—		2,353,962
Non-U.S. Government Agency Obligations		—			324,061,007		—		324,061,007
Sovereign Debt Obligations		—			8,222,502		—		8,222,502
U.S. Government Agency Obligations and Instrumentalities		—			209,764,886		—		209,764,886
U.S. Treasury Obligations		—			49,208,450		—		49,208,450
Purchased Options		—			3,002,961		—		3,002,961
Short-Term Investments		—			135,416,534		—		135,416,534
Total Investments	$	—		$	1,107,346,383	$	—	$	1,107,346,383
Asset Derivatives
Futures Contracts	$	351,925		$	—	$	—	$	351,925
Liability Derivatives
Futures Contracts	$	(3,370,381	)	$	—	$	—	$	(3,370,381	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Short-Duration Bond Fund

Asset Investments	Level 1			Level 2		Level 3		Total
Corporate Debt	$	—		$	88,097,777	$	—	$	88,097,777
Municipal Obligations		—			402,526		—		402,526
Non-U.S. Government Agency Obligations		—			90,133,189		—		90,133,189
U.S. Government Agency Obligations and Instrumentalities		—			3,360,250		—		3,360,250
U.S. Treasury Obligations		—			1,280,118		—		1,280,118
Purchased Options		—			138,323		—		138,323
Short-Term Investments		—			3,799,132		—		3,799,132
Total Investments	$	—		$	187,211,315	$	—	$	187,211,315
Asset Derivatives
Futures Contracts	$	1,157,546		$	—	$	—	$	1,157,546
Liability Derivatives
Futures Contracts	$	(602,018	)	$	—	$	—	$	(602,018	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Strategic Emerging Markets Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock*
Bermuda	$	661,681	$	505,937	$	—	$	1,167,618
Brazil		3,879,227		—		—		3,879,227
Cayman Islands		17,202,500		11,908,522		—		29,111,022
Chile		956,078		—		—		956,078
China		—		4,298,852		—		4,298,852
Colombia		380,509		—		—		380,509
Egypt		—		662,508		—		662,508
France		—		5,447,928		—		5,447,928
Hong Kong		—		4,055,978		—		4,055,978
India		—		15,323,147		—		15,323,147
Indonesia		—		1,126,641		—		1,126,641
Italy		—		1,639,380		—		1,639,380
Luxembourg		—		202,085		—		202,085
Mexico		6,356,487		—		—		6,356,487
Netherlands		3,158,222		—		—		3,158,222
Philippines		—		2,361,692		—		2,361,692
Republic of Korea		—		2,210,529		—		2,210,529
Russia		20,540		5,198,218		—		5,218,758
South Africa		—		645,019		—		645,019
Switzerland		—		1,925,029		—		1,925,029
Taiwan		—		8,421,333		—		8,421,333
Turkey		—		297,362		—		297,362
United Kingdom		—		422,146		—		422,146
United States		3,547,982		—		—		3,547,982
Preferred Stock
Brazil		1,823,330		—		—		1,823,330
India		13,093		—		—		13,093
Singapore		—		—		2,160,355		2,160,355
Mutual Funds		383,585		—		—		383,585
Warrants		18,529		—		—		18,529
Short-Term Investments		—		302,018		—		302,018
Total Investments	$	38,401,763	$	66,954,324	$	2,160,355	$	107,516,442

* 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 March 31, 2021.

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 March 31, 2021, 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.

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.

Notes to Portfolio of Investments (Unaudited) (Continued)

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.

3. Federal Income Tax Information

At March 31, 2021, 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:

Notes to Portfolio of Investments (Unaudited) (Continued)

	Federal Income Tax Cost		Tax Basis Unrealized Appreciation		Tax Basis Unrealized (Depreciation)			Net Unrealized Appreciation (Depreciation)
Blend Fund	$	783,302,122	$	48,882,376	$	(9,064,759	)	$	39,817,617
Dynamic Bond Fund		311,137,434		8,747,882		(10,283,791	)		(1,535,909	)
Equity Fund		633,632,905		236,852,961		(1,078,287	)		235,774,674
Equity Momentum Fund		38,763,600		2,019,201		(444,746	)		1,574,455
Equity Rotation Fund		42,217,981		4,644,021		(1,183,264	)		3,460,757
High Yield Fund		93,254,054		5,089,662		(2,554,639	)		2,535,023
Inflation-Protected and Income Fund		337,234,321		3,072,546		(1,702,719	)		1,369,827
Managed Bond Fund		1,089,890,065		30,002,047		(12,545,729	)		17,456,318
Short-Duration Bond Fund		184,788,167		3,579,980		(1,156,832	)		2,423,148
Small Cap Equity Fund		94,546,607		52,457,651		(3,070,491	)		49,387,160
Special Situations Fund		33,248,270		7,537,212		(1,055,313	)		6,481,899
Strategic Emerging Markets Fund		84,815,597		26,025,015		(3,324,170	)		22,700,845

Notes to Portfolio of Investments (Unaudited) (Continued)

4. New Accounting Pronouncements

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.

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 does not believe the impact of adopting ASU 2020-04 will have a material impact on the financial statements.

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.

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, subadviser, or other service providers to serve the Fund and could lead to disruptions that negatively impact the Fund.