MML Series Investment Fund II NPORT-P MML iShares 60/40 Allocation Fund (Mar 2022 report)

MML Blend Fund —  Portfolio of Investments

March 31, 2022 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 103.8%
Diversified Financial Services — 103.8%
iShares 5-10 Year Investment Grade Corporate Bond ETF (a)		539,876	$	29,622,996
iShares Core S&P 500 ETF		467,524		212,110,964
iShares Core S&P Mid-Cap ETF		61,912		16,613,466
iShares Core S&P Small-Cap ETF (a)		67,765		7,310,488
iShares Core S&P Total US Stock Market ETF		2,303,954		232,561,117
iShares Core Total USD Bond Market ETF		2,508,276		124,485,738
iShares Core U.S. Aggregate Bond ETF		1,160,952		124,337,959
iShares iBoxx High Yield Corporate Bond ETF (a)		357,788		29,442,374
State Street Navigator Securities Lending Government Money Market Portfolio (b)		29,282,810		29,282,810
TOTAL MUTUAL FUNDS (Cost $742,690,712)				805,767,912
TOTAL LONG-TERM INVESTMENTS (Cost $742,690,712)				805,767,912
	Principal Amount
SHORT-TERM INVESTMENTS — 0.1%
Repurchase Agreement — 0.1%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/22, 0.000%, due 4/01/22 (c)	$	1,288,514		1,288,514
TOTAL SHORT-TERM INVESTMENTS (Cost $1,288,514)				1,288,514
TOTAL INVESTMENTS — 103.9% (Cost $743,979,226) (d)				807,056,426
Other Assets/(Liabilities) — (3.9)%				(30,590,641)
NET ASSETS — 100.0%			$	776,465,785

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, 2022, was $36,184,202 or 4.66% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $7,848,355 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 $1,288,514. Collateralized by U.S. Government Agency obligations with a rate of 0.500%, maturity date of 4/15/24, and an aggregate market value, including accrued interest, of $1,314,366.

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

MML Dynamic Bond Fund —  Portfolio of Investments

March 31, 2022 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 90.9%
BANK LOANS — 4.7%
Advertising — 0.0%
CMG Media Corp., 2021 Term Loan, 1 mo. USD LIBOR + 3.500%
3.957% VRN 12/17/26	$	58,658	$	57,695
Aerospace & Defense — 0.1%
TransDigm, Inc., 2020 Term Loan F, 1 mo. USD LIBOR + 2.250%
2.707% VRN 12/09/25		167,874		164,936
Airlines — 0.1%
AAdvantage Loyalty IP Ltd., 2021 Term Loan, 3 mo. USD LIBOR + 4.750%
5.500% VRN 4/20/28		120,000		121,387
Air Canada, 2021 Term Loan B, 3 mo. USD LIBOR + 3.500%
4.250% VRN 8/11/28		75,000		74,219
American Airlines, Inc., 2017 Incremental Term Loan, 6 mo. USD LIBOR + 2.000%
2.840% VRN 12/15/23		73,310		72,322
Kestrel Bidco, Inc., Term Loan B, 6 mo. USD LIBOR + 3.000
4.000% VRN 12/11/26		68,539		65,897
United Airlines, Inc., 2021 Term Loan B, 3 mo. USD LIBOR + 3.750%
4.500% VRN 4/21/28		84,363		83,238
				417,063
Auto Parts & Equipment — 0.0%
Clarios Global LP, 2021 USD Term Loan B, 1 mo. USD LIBOR + 3.250%
3.707% VRN 4/30/26		129,445		127,666
Building Materials — 0.1%
CP Atlas Buyer, Inc., 2021 Term Loan B, 1 mo. USD LIBOR + 3.750%
4.250% VRN 11/23/27		26,897		26,094
Solis IV BV, USD Term Loan B1, 3 mo. SOFR + 3.500%
4.000% VRN 2/26/29		250,000		244,688
				270,782
Chemicals — 0.2%
Diamond (BC) B.V., 2021 Term Loan B, 1 mo. USD LIBOR + 2.750%
3.250% VRN 9/29/28		174,563		170,809
Illuminate Buyer, LLC, 2021 Term Loan, 1 mo. USD LIBOR + 3.500%
3.957% VRN 6/30/27		79,892		77,146
Kraton Corp., 2022 USD Term Loan, 3 mo. USD LIBOR + 3.250%
3.990% VRN 3/15/29		75,000		74,016
Olympus Water U.S. Holding Corp., 2021 USD Term Loan B, 3 mo. USD LIBOR + 3.750%
4.746% VRN 11/09/28		99,750		96,929
PMHC II, Inc., 2022 Term Loan B,
0.000% VRN 2/01/29 (a)		195,000		185,656

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
W.R. Grace & Co., 2021 Term Loan B, 3 mo. USD LIBOR + 3.750%
4.813% VRN 9/22/28	$	144,638	$	143,191
				747,747
Commercial Services — 0.3%
Allied Universal Holdco LLC, 2021 USD Incremental Term Loan B, 1 mo. USD LIBOR + 3.750%
4.250% VRN 5/12/28		291,908		287,060
CHG Healthcare Services, Inc., 2021 Term Loan, 3 mo. USD LIBOR + 3.500%, 6 mo. USD LIBOR + 3.500%
4.506% - 5.000% VRN 9/29/28		134,325		132,940
CoreLogic, Inc., Term Loan, 1 mo. USD LIBOR + 3.500%
4.000% VRN 6/02/28		64,838		63,987
EAB Global, Inc., 2021 Term Loan, 1 mo. USD LIBOR + 3.500%, 3 mo. USD LIBOR + 3.500%
3.949% - 3.949% VRN 8/16/28		160,000		158,200
Mister Car Wash Holdings, Inc., 2019 Term Loan B, 1 mo. USD LIBOR + 3.000%
3.457% VRN 5/14/26		47,781		47,081
Spin Holdco, Inc., 2021 Term Loan, 3 mo. USD LIBOR + 4.000%
4.750% VRN 3/04/28		84,363		83,612
Team Health Holdings, Inc., 1st Lien Term Loan, 1 mo. USD LIBOR + 2.750%
3.750% VRN 2/06/24		24,418		23,162
Trans Union, LLC, 2021 Term Loan B6, 1 mo. USD LIBOR + 2.250%
2.750% VRN 12/01/28		86,847		86,087
Verscend Holding Corp., 2021 Term Loan B, 1 mo. USD LIBOR + 4.000%
4.457% VRN 8/27/25		69,475		69,128
				951,257
Computers — 0.1%
McAfee, LLC, 2022 USD Term Loan B, 3 mo. SOFR + 4.000%
4.500% VRN 3/01/29		110,000		109,037
Peraton Corp., Term Loan B, 1 mo. USD LIBOR + 3.750%
4.500% VRN 2/01/28		116,654		115,669
Tempo Acquisition LLC, 2022 Term Loan B, 1 mo. SOFR + 3.000%
3.500% VRN 8/31/28		74,813		74,233
				298,939
Diversified Financial Services — 0.2%
AllSpring Buyer LLC, Term Loan B, 3 mo. USD LIBOR + 3.250%
4.313% VRN 11/01/28		93,145		92,418
Astra Acquisition Corp., 2021 1st Lien Term Loan, 1 mo. USD LIBOR + 5.250%
5.750% VRN 10/25/28		249,375		241,582
Blackhawk Network Holdings, Inc., 2018 1st Lien Term Loan, 1 mo. USD LIBOR + 3.000%
3.457% VRN 6/15/25		113,660		111,387
Castlelake Aviation Ltd., Term Loan B, 3 mo. USD LIBOR + 2.750%
3.250% VRN 10/22/26		144,275		140,218
Deerfield Dakota Holding LLC, 2020 USD Term Loan B, 1 mo. USD LIBOR + 3.750%
4.750% VRN 4/09/27		117,925		117,187
				702,792

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Electric — 0.0%
Pacific Gas & Electric Co., 2020 Term Loan, 1 mo. USD LIBOR + 3.000%
3.500% VRN 6/23/25	$	73,688	$	72,674
Electronics — 0.1%
Compass Power Generation LLC, 2018 Term Loan B, 1 mo. USD LIBOR + 3.500%
4.500% VRN 12/20/24		49,647		48,835
Mirion Technologies, Inc., 2021 Term Loan, 2 mo. USD LIBOR + 2.750%
3.250% VRN 10/20/28		94,810		93,709
				142,544
Entertainment — 0.1%
UFC Holdings LLC, 2021 Term Loan B, 6 mo. USD LIBOR + 2.750%
3.500% VRN 4/29/26		200,914		198,654
Environmental Controls — 0.0%
Filtration Group Corp., 2018 1st Lien Term Loan, 1 mo. USD LIBOR + 3.000%
3.457% VRN 3/29/25		109,424		107,703
Food — 0.1%
CHG PPC Parent LLC, 2021 Term Loan, 1 mo. USD LIBOR + 3.000%
3.500% VRN 12/08/28		120,000		117,000
H Food Holdings LLC, 2018 Term Loan B, 1 mo. USD LIBOR + 3.688%
4.145% VRN 5/23/25		48,796		46,928
United Natural Foods, Inc., Term Loan B, 1 mo. USD LIBOR + 3.250%
3.707% VRN 10/22/25		8,733		8,644
				172,572
Health Care – Products — 0.1%
Medline Borrower LP, USD Term Loan B, 1 mo. USD LIBOR + 3.250%
3.750% VRN 10/23/28		245,000		242,428
Health Care – Services — 0.3%
ADMI Corp., 2021 Incremental Term Loan B3, 1 mo. USD LIBOR + 3.500%
4.000% VRN 12/23/27		64,675		63,813
Aveanna Healthcare, LLC
2021 Term Loan B,
0.000% 7/17/28 (a)		141,626		137,696
2021 Delayed Draw Term Loan,
0.000% 7/17/28 (a) (b)		33,019		32,102
Envision Healthcare Corp., 2018 1st Lien Term Loan, 1 mo. USD LIBOR + 3.750%
4.207% VRN 10/10/25		46,068		30,482
Radiology Partners, Inc., 2018 1st Lien Term Loan B, 1 mo. USD LIBOR + 4.250%
4.718% - 4.697% VRN 7/09/25		145,000		142,903
Radnet Management, Inc., 2021 Term Loan, 3 mo. USD LIBOR + 3.000%, 3. mo Prime + 2.000%
3.750% - 5.500% VRN 4/21/28		288,136		283,918
RegionalCare Hospital Partners Holdings, Inc., 2018 Term Loan B, 1 mo. USD LIBOR + 3.750%
4.197% VRN 11/16/25		95,193		94,529
				785,443

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
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	$	118,500	$	110,107
Housewares — 0.1%
Springs Windows Fashions, LLC, 2021 Term Loan B, 1 mo. USD LIBOR + 4.000%
4.750% VRN 10/06/28		290,000		280,816
Insurance — 0.3%
Acrisure LLC
2020 Term Loan B, 1 mo. USD LIBOR + 3.500%
3.957% VRN 2/15/27		121,877		119,947
2021 First Lien Term Loan B, 1 mo. USD LIBOR + 4.250%
4.750% VRN 2/15/27		124,688		123,987
Asurion LLC
2020 Term Loan B8, 1 mo. USD LIBOR + 3.250%
3.707% VRN 12/23/26		153,063		149,554
2021 Term Loan B9, 1 mo. USD LIBOR + 3.250%
3.707% VRN 7/31/27		74,436		72,831
OneDigital Borrower LLC, 2021 Term Loan, 3 mo. SOFR + 4.250%
4.750% VRN 11/16/27		329,175		326,502
Sedgwick Claims Management Services, Inc., 2019 Term Loan B, 1 mo. USD LIBOR + 3.750%
4.207% VRN 9/03/26		34,038		33,772
				826,593
Internet — 0.1%
Getty Images, Inc., 2019 USD Term Loan B, 3 mo. USD LIBOR + 4.500%
5.063% VRN 2/19/26		33,831		33,556
ION Trading Finance Ltd., 2021 USD Term Loan, 3 mo. USD LIBOR + 4.750%
5.207% VRN 4/03/28		228,275		226,182
Proofpoint, Inc., 1st Lien Term Loan, 3 mo. USD LIBOR + 3.250%
3.758% VRN 8/31/28		130,000		128,464
				388,202
Leisure Time — 0.1%
Carnival Corp., 2021 Incremental Term Loan B, 3 mo. USD LIBOR + 3.250%
4.000% VRN 10/18/28		219,450		214,238
ClubCorp Holdings, Inc., 2017 Term Loan B, 3 mo. USD LIBOR + 2.750%
3.756% VRN 9/18/24		19,286		18,262
				232,500
Lodging — 0.0%
Caesars Resort Collection LLC, 2020 Term Loan B1, 1 mo. USD LIBOR + 3.500%
3.957% VRN 7/21/25		59,100		58,834
Machinery – Diversified — 0.1%
Titan Acquisition Ltd., 2018 Term Loan B, 3 mo. USD LIBOR + 3.000%
4.006% VRN 3/28/25		39,084		38,177

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Vertical U.S. Newco Inc, Term Loan B, 6 mo. USD LIBOR + 3.500%
4.000% - 4.019% VRN 7/30/27	$	197,512	$	195,415
				233,592
Media — 0.2%
Cengage Learning, Inc., 2021 Term Loan B, 3 mo. USD LIBOR + 4.750%
5.750% VRN 7/14/26		159,575		158,080
DirecTV Financing LLC, Term Loan, 3 mo. USD LIBOR + 5.000%
5.750% VRN 8/02/27		69,834		69,680
The E.W. Scripps Co., 2019 Term Loan B2, 1 mo. USD LIBOR + 2.563%
3.313% VRN 5/01/26		115,099		113,557
Radiate Holdco LLC, 2021 Term Loan B, 1 mo. USD LIBOR + 3.250%
4.000% VRN 9/25/26		144,638		143,246
				484,563
Packaging & Containers — 0.1%
Flex Acquisition Co., Inc., 2018 Incremental Term Loan, 3 mo. USD LIBOR + 3.000%
3.214% VRN 6/29/25		24,491		24,431
Pretium PKG Holdings, Inc., 2021 1st Lien Term Loan, 3 mo. USD LIBOR + 4.000%
4.500% VRN 10/02/28		109,725		106,414
TricorBraun Holdings, Inc. ., 2021 Term Loan, 1 mo. USD LIBOR + 3.250%
3.750% VRN 3/03/28		69,496		67,652
				198,497
Pharmaceuticals — 0.3%
Gainwell Acquisition Corp., Term Loan B, 3 mo. USD LIBOR + 4.000%
5.006% VRN 10/01/27		237,285		236,691
ICON Luxembourg SARL
US Term Loan, 3 mo. USD LIBOR + 2.250%
3.256% VRN 7/03/28		17,183		17,086
LUX Term Loan, 3 mo. USD LIBOR + 2.250%
3.256% VRN 7/03/28		68,967		68,579
Jazz Financing Lux SARL, USD Term Loan, 1 mo. USD LIBOR + 3.500%
4.000% VRN 5/05/28		223,313		222,281
Organon & Co, USD Term Loan, 3 mo. USD LIBOR + 3.000%
3.563% VRN 6/02/28		216,938		215,582
				760,219
Pipelines — 0.1%
CQP Holdco LP, 2021 Term Loan B, 3 mo. USD LIBOR + 3.750%
4.756% VRN 6/05/28		218,054		216,726
Traverse Midstream Partners LLC, 2017 Term Loan, 3 mo. SOFR + 4.250%
5.250% 9/27/24		53,816		53,524
				270,250
Retail — 0.2%
Great Outdoors Group LLC, 2021 Term Loan B1, 1 mo. USD LIBOR + 3.750%
4.500% VRN 3/06/28		172,819		171,955
Petco Health & Wellness Co., Inc., 2021 Term Loan B, 3 mo. USD LIBOR + 3.250%
4.256% VRN 3/03/28		124,063		122,734

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
PetSmart, Inc., 2021 Term Loan B, 3 mo. USD LIBOR + 3.750%
4.500% VRN 2/11/28	$	69,650	$	69,360
SRS Distribution, Inc., 2021 Term Loan B, 3 mo. USD LIBOR + 3.500%, 3 mo. USD LIBOR + 3.750%
4.000% - 4.250% VRN 6/02/28		99,500		98,174
Whatabrands LLC, 2021 Term Loan B, 1 mo. USD LIBOR + 3.250%
3.750% VRN 8/03/28		114,713		113,207
				575,430
Software — 1.1%
Ascend Learning LLC, 2021 Term Loan, 1 mo. USD LIBOR + 3.500%
4.000% VRN 12/11/28		275,000		271,631
Athenahealth, Inc.
2022 Delayed Draw Term Loan, 3 mo. SOFR + 0.000%
4.000% VRN 2/15/29 (b)		28,986		28,630
2022 Term Loan B, 1 mo. SOFR + 3.500%
4.000% VRN 2/15/29		171,014		168,920
Camelot U.S. Acquisition 1 Co., 2020 Incremental Term Loan B, 1 mo. USD LIBOR + 3.000%
4.000% VRN 10/30/26		118,500		117,242
Castle U.S. Holding Corp., USD Term Loan B, 3 mo. USD LIBOR + 3.750%
4.756% VRN 1/29/27		157,667		152,174
Cornerstone OnDemand, Inc., 2021 Term Loan, 3 mo. USD LIBOR + 3.750%
4.250% VRN 10/16/28		130,000		128,537
Cvent, Inc., 1st Lien Term Loan, 1 mo. USD LIBOR + 3.750%
4.207% VRN 11/29/24		34,082		33,628
DCert Buyer, Inc., 2019 Term Loan B, 1 mo. USD LIBOR + 4.000%
4.457% VRN 10/16/26		74,055		73,428
Finastra USA, Inc., 2021 EUR Term Loan B, 3 mo. USD LIBOR + 7.250%
8.250% VRN 6/13/25		20,000		19,641
Greeneden U.S. Holdings II LLC, 2020 USD Term Loan B4, 1 mo. USD LIBOR + 4.000%
4.449% VRN 12/01/27		245,915		245,300
Hyland Software, Inc., 2018 1st Lien Term Loan, 1 mo. USD LIBOR + 3.500%
3.957% VRN 7/01/24		219,866		218,457
Mitchell International, Inc., 2021 Term Loan B, 1 mo. USD LIBOR + 3.750%
4.250% VRN 10/15/28		305,000		299,629
Polaris Newco LLC, USD Term Loan B, 1 mo. USD LIBOR + 4.000%
4.500% VRN 6/02/28		308,450		305,905
Project Alpha Intermediate Holding, Inc., 2021 Term Loan B, 3 mo. USD LIBOR + 4.000%
4.300% VRN 4/26/24		186,375		184,861
Sophia, L.P., 2021 Term Loan B, 3 mo. USD LIBOR + 3.250%
4.256% VRN 10/07/27		148,131		146,495
The Ultimate Software Group, Inc.
2021 Term Loan, 3 mo. USD LIBOR + 3.250%
3.750% VRN 5/04/26		183,492		181,824
Term Loan B, 3 mo. USD LIBOR + 3.750%
4.756% VRN 5/04/26		122,166		121,578
Tibco Software, Inc., 2020 Term Loan B3, 1 mo. USD LIBOR + 3.750%
4.210% VRN 6/30/26		127,688		126,890
Zelis Healthcare Corp.
2021 Delayed Draw Term Loan, 3 mo. USD LIBOR + 3.500%
3.500% VRN 9/30/26 (b)		35,333		34,925
2021 Term Loan B, 1 mo. USD LIBOR + 3.500%
3.731% VRN 9/30/26		193,844		191,603
				3,051,298

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Telecommunications — 0.1%
Avaya, Inc., 2020 Term Loan B, 1 mo. USD LIBOR + 4.250%
4.647% VRN 12/15/27	$	38,781	$	38,461
Gogo Intermediate Holdings LLC, Term Loan B, 3 mo. USD LIBOR + 3.750%
4.500% VRN 4/30/28		59,700		59,178
Intelsat Jackson Holdings S.A., 2021 Exit Term Loan B, 6 mo. SOFR + 4.250%
4.920% VRN 2/01/29		129,675		127,365
				225,004
Transportation — 0.1%
First Student Bidco, Inc.
Term Loan C, 3 mo. USD LIBOR + 3.000%
3.983% VRN 7/21/28		41,789		41,406
Term Loan B, 3 mo. USD LIBOR + 3.000%
3.983% VRN 7/21/28		112,928		111,892
				153,298
TOTAL BANK LOANS (Cost $13,442,259)				13,310,098
CORPORATE DEBT — 24.4%
Advertising — 0.1%
Clear Channel Outdoor Holdings, Inc.
7.500% 6/01/29 (c)		95,000		95,066
The Interpublic Group of Cos., Inc.
5.400% 10/01/48		125,000		148,628
				243,694
Aerospace & Defense — 0.4%
The Boeing Co.
2.950% 2/01/30		235,000		217,769
3.750% 2/01/50		120,000		106,796
Northrop Grumman Corp.
5.150% 5/01/40		285,000		331,949
Raytheon Technologies Corp.
3.030% 3/15/52		240,000		210,143
TransDigm, Inc.
5.500% 11/15/27		100,000		99,250
6.250% 3/15/26 (c)		150,000		154,219
				1,120,126
Agriculture — 0.1%
BAT Capital Corp.
3.462% 9/06/29		460,000		433,049
Airlines — 0.1%
American Airlines, Inc. /AAdvantage Loyalty IP Ltd.
5.750% 4/20/29 (c)		125,000		124,531
Southwest Airlines Co.
4.750% 5/04/23		215,000		219,567

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
United Airlines, Inc.
4.625% 4/15/29 (c)	$	65,000	$	61,812
				405,910
Auto Manufacturers — 0.6%
Ford Motor Co.
3.250% 2/12/32		110,000		98,080
Ford Motor Credit Co. LLC 3 mo. USD LIBOR + 1.235%
1.741% FRN 2/15/23		410,000		406,834
General Motors Financial Co., Inc.
2.400% 10/15/28		245,000		219,677
3.100% 1/12/32		235,000		211,253
Hyundai Capital America
1.800% 10/15/25 (c)		5,000		4,676
2.650% 2/10/25 (c)		455,000		441,304
Volkswagen Group of America Finance LLC
4.250% 11/13/23 (c)		220,000		224,230
				1,606,054
Auto Parts & Equipment — 0.1%
American Axle & Manufacturing, Inc.
5.000% 10/01/29 (d)		55,000		51,598
Aptiv PLC
3.100% 12/01/51		260,000		206,577
Dealer Tire LLC / DT Issuer LLC
8.000% 2/01/28 (c)		15,000		15,037
The Goodyear Tire & Rubber Co.
5.250% 7/15/31 (c) (d)		105,000		97,093
				370,305
Banks — 3.6%
Australia & New Zealand Banking Group Ltd. 5 year CMT + 1.700%
2.570% VRN 11/25/35 (c)		405,000		353,585
Banco Davivienda SA 10 year CMT + 5.097%
6.650% VRN (c) (e)		200,000		184,002
Banco Macro SA 5 year USD Swap + 5.463%
6.643% VRN 11/04/26 (c)		200,000		165,000
Banco Mercantil del Norte SA 10 year CMT + 5.353%
7.625% VRN (c) (e)		200,000		200,914
Bangkok Bank PCL 5 year CMT + 4.729%
5.000% VRN (c) (e)		200,000		197,250
Bank of America Corp.
5 year CMT + 1.200% 2.482% VRN 9/21/36		450,000		386,955
SOFR + 1.210% 2.572% VRN 10/20/32		170,000		154,496
Bank of Montreal 5 year USD Swap + 1.432%
3.803% VRN 12/15/32		310,000		306,857
Barclays PLC 3 mo. USD LIBOR + 1.380%
1.839% FRN 5/16/24		425,000		427,054
BNP Paribas SA SOFR + 1.507%
3.052% VRN 1/13/31 (c)		390,000		364,862
BPCE SA
1.000% 1/20/26 (c)		250,000		229,507
Citigroup, Inc.
3 mo. USD LIBOR + 1.100% 1.569% FRN 5/17/24 (d)		510,000		512,728
SOFR + 0.694% 2.014% VRN 1/25/26		95,000		91,551
SOFR + 1.280% 3.070% VRN 2/24/28		135,000		131,784

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Commonwealth Bank of Australia
4.316% 1/10/48 (c)	$	305,000	$	303,020
Deutsche Bank AG SOFR + 1.219%
2.311% VRN 11/16/27		215,000		197,307
The Goldman Sachs Group, Inc.
SOFR + .820% 1.071% FRN 9/10/27		165,000		160,799
3 mo. USD LIBOR + 1.170% 1.676% FRN 5/15/26		530,000		532,719
HSBC Holdings PLC 3 mo. USD LIBOR + 1.380%
2.183% FRN 9/12/26		510,000		516,196
JP Morgan Chase & Co.
SOFR + 1.015% 2.069% VRN 6/01/29		195,000		180,039
SOFR + 2.040% 2.522% VRN 4/22/31		290,000		268,871
SOFR + 1.250% 2.580% VRN 4/22/32		240,000		219,909
SOFR + 0.915% 2.595% VRN 2/24/26		160,000		157,085
SOFR + 1.260% 2.963% VRN 1/25/33		230,000		216,866
The Korea Development Bank
1.625% 1/19/31		200,000		177,096
Lloyds Banking Group PLC 3 mo. USD LIBOR + 1.205%
3.574% VRN 11/07/28		400,000		391,362
Macquarie Group Ltd. SOFR + 1.532%
2.871% VRN 1/14/33 (c)		530,000		470,482
Mitsubishi UFJ Financial Group, Inc.
1.412% 7/17/25		435,000		408,442
Morgan Stanley
SOFR + 1.360% 2.484% VRN 9/16/36		450,000		385,535
SOFR + 1.290% 2.943% VRN 1/21/33		115,000		107,856
National Australia Bank Ltd.
2.990% 5/21/31 (c)		250,000		226,887
NatWest Markets PLC
0.800% 8/12/24 (c)		200,000		188,438
Oversea-Chinese Banking Corp. Ltd. 5 year CMT + 1.580%
1.832% VRN 9/10/30 (c)		500,000		471,140
Santander Holdings SOFR + 1.249%
2.490% VRN 1/06/28		135,000		126,137
United Overseas Bank Ltd. 5 year CMT + 1.520%
1.750% VRN 3/16/31 (c)		200,000		186,190
Wells Fargo & Co.
SOFR + 1.432% 2.879% VRN 10/30/30		210,000		199,617
3 mo. USD LIBOR + 1.170% 3.196% VRN 6/17/27		245,000		242,283
Westpac Banking Corp. 5 year CMT + 1.530%
3.020% VRN 11/18/36		245,000		217,740
				10,258,561
Beverages — 0.4%
Anheuser-Busch InBev Worldwide, Inc.
4.600% 4/15/48		405,000		435,291
Constellation Brands, Inc.
2.875% 5/01/30		55,000		51,596
3.150% 8/01/29		175,000		168,775
Keurig Dr Pepper, Inc.
3.800% 5/01/50		225,000		213,623
Primo Water Holdings, Inc.
4.375% 4/30/29 (c)		70,000		63,357
Triton Water Holdings, Inc.
6.250% 4/01/29 (c)		145,000		123,975
				1,056,617

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Biotechnology — 0.1%
Illumina, Inc.
0.550% 3/23/23	$	165,000	$	161,860
Royalty Pharma PLC
3.300% 9/02/40		250,000		212,701
				374,561
Building Materials — 0.2%
Carrier Global Corp.
3.377% 4/05/40		355,000		322,988
Griffon Corp.
5.750% 3/01/28		170,000		163,455
Owens Corning
4.400% 1/30/48		190,000		188,958
				675,401
Chemicals — 0.3%
ASP Unifrax Holdings, Inc.
5.250% 9/30/28 (c)		105,000		98,025
CF Industries, Inc.
5.375% 3/15/44		195,000		219,260
CVR Partners LP / CVR Nitrogen Finance Corp.
6.125% 6/15/28 (c)		65,000		64,981
EverArc Escrow SARL
5.000% 10/30/29 (c)		140,000		127,925
The Sherwin-Williams Co.
2.900% 3/15/52		100,000		81,907
WR Grace Holdings LLC
5.625% 8/15/29 (c)		135,000		126,238
				718,336
Coal — 0.0%
SunCoke Energy, Inc.
4.875% 6/30/29 (c)		90,000		84,849
Commercial Services — 0.3%
Adani International Container Terminal Pvt Ltd.
3.000% 2/16/31 (c)		192,000		171,444
Adani Ports & Special Economic Zone Ltd.
4.000% 7/30/27 (c)		200,000		194,196
Allied Universal Holdco LLC / Allied Universal Finance Corp.
6.625% 7/15/26 (c)		70,000		70,828
9.750% 7/15/27 (c)		130,000		134,225
Garda World Security Corp.
6.000% 6/01/29 (c)		115,000		103,613
NESCO Holdings II, Inc.
5.500% 4/15/29 (c)		20,000		19,650
Triton Container International Ltd.
1.150% 6/07/24 (c)		90,000		85,454
Triton Container International Ltd. / TAL International Container Corp.
3.250% 3/15/32		120,000		110,536
WASH Multifamily Acquisition, Inc.
5.750% 4/15/26 (c)		85,000		85,212
				975,158

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Computers — 0.1%
Fortinet, Inc.
1.000% 3/15/26	$	235,000	$	214,114
NetApp, Inc.
1.875% 6/22/25		220,000		210,619
				424,733
Cosmetics & Personal Care — 0.0%
Coty, Inc.
5.000% 4/15/26 (c)		65,000		63,298
Diversified Financial Services — 1.6%
AerCap Ireland Capital DAC / AerCap Global Aviation Trust
3.400% 10/29/33		420,000		376,507
Air Lease Corp.
1.875% 8/15/26		170,000		156,449
Aircastle Ltd.
2.850% 1/26/28 (c)		240,000		215,963
Aviation Capital Group LLC
1.950% 9/20/26 (c)		395,000		357,543
Avolon Holdings Funding Ltd.
3.250% 2/15/27 (c)		330,000		310,838
BOC Aviation Ltd. 3 mo. USD LIBOR + 1.125%
2.091% FRN 9/26/23 (c)		340,000		340,074
CI Financial Corp.
4.100% 6/15/51 (d)		115,000		100,597
Discover Financial Services
4.100% 2/09/27		505,000		515,621
Global Aircraft Leasing Co. Ltd.
6.500% 9/15/24 (c)		112,750		102,543
Interoceanica IV Finance Ltd.
0.000% 11/30/25 (c)		449,288		420,264
Nasdaq, Inc.
3.950% 3/07/52		45,000		43,637
Nationstar Mortgage Holdings, Inc.
5.750% 11/15/31 (c)		185,000		176,436
Navient Corp.
5.000% 3/15/27		60,000		57,372
NFP Corp.
6.875% 8/15/28 (c)		70,000		66,675
OneMain Finance Corp.
6.625% 1/15/28		120,000		125,437
PennyMac Financial Services, Inc.
4.250% 2/15/29 (c)		145,000		124,410
SPARC EM SPC Panama Metro Line 2 SP
0.000% 12/05/22 (c)		37,207		36,686
Synchrony Financial
3.950% 12/01/27		425,000		421,599
Unifin Financiera SAB de CV 5 year CMT + 6.308%
8.875% VRN (c) (e)		300,000		108,030
The Western Union Co.
1.350% 3/15/26		55,000		50,753
2.750% 3/15/31		425,000		386,665
				4,494,099

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Electric — 3.0%
AES Argentina Generacion SA
7.750% 2/02/24 (c)	$	150,000	$	126,568
American Electric Power Co., Inc.
2.950% 12/15/22		313,000		314,233
Calpine Corp.
4.625% 2/01/29 (c)		40,000		36,800
5.125% 3/15/28 (c)		100,000		95,258
Duke Energy Carolinas LLC
2.850% 3/15/32		35,000		33,834
Duke Energy Corp.
3.950% 8/15/47		310,000		302,728
Empresa Electrica Angamos SA
4.875% 5/25/29 (c)		130,400		123,880
Empresas Publicas de Medellin ESP
4.375% 2/15/31 (c)		400,000		345,404
Entergy Corp.
2.800% 6/15/30		110,000		103,188
Exelon Corp.
4.100% 3/15/52 (c)		65,000		65,982
Fenix Power Peru SA
4.317% 9/20/27 (c)		236,029		230,131
Georgia Power Co.
2.200% 9/15/24		240,000		235,487
3.250% 3/15/51		500,000		433,253
Guacolda Energia SA
4.560% 4/30/25 (c)		400,000		134,000
Korea East-West Power Co. Ltd.
1.750% 5/06/25 (c)		200,000		191,814
LLPL Capital Pte Ltd.
6.875% 2/04/39 (c)		261,510		261,641
Mercury Chile Holdco LLC
6.500% 1/24/27 (c)		200,000		191,454
Minejesa Capital BV
4.625% 8/10/30 (c)		400,000		379,000
Monongahela Power Co.
5.400% 12/15/43 (c)		145,000		166,013
NextEra Energy Capital Holdings, Inc.
2.250% 6/01/30		750,000		686,162
NRG Energy, Inc.
2.000% 12/02/25 (c)		145,000		136,500
3.625% 2/15/31 (c)		145,000		127,541
Pacific Gas and Electric Co.
1.367% 3/10/23		305,000		299,491
2.500% 2/01/31		255,000		219,840
Pampa Energia SA
9.125% 4/15/29 (c)		150,000		133,500
Pike Corp.
5.500% 9/01/28 (c)		210,000		197,925
Sierra Pacific Power Co.
2.600% 5/01/26		1,000,000		983,377
The Southern Co.
3.700% 4/30/30 (d)		500,000		502,171
5 year CMT + 2.915% 3.750% VRN 9/15/51		165,000		152,138
Southwestern Electric Power Co.
3.250% 11/01/51		160,000		137,494
Transelec SA
3.875% 1/12/29 (c)		250,000		254,065

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Xcel Energy, Inc.
3.300% 6/01/25	$	1,000,000	$	1,000,673
				8,601,545
Electrical Components & Equipment — 0.0%
Energizer Holdings, Inc.
4.750% 6/15/28 (c)		110,000		100,007
Electronics — 0.1%
Arrow Electronics, Inc.
3.875% 1/12/28		200,000		200,992
Vontier Corp.
2.400% 4/01/28		115,000		101,108
				302,100
Energy – Alternate Sources — 0.1%
UEP Penonome II SA
6.500% 10/01/38 (c)		192,383		182,764
Engineering & Construction — 0.2%
Sydney Airport Finance Co. Pty Ltd.
3.375% 4/30/25 (c)		300,000		298,566
3.625% 4/28/26 (c)		300,000		301,401
				599,967
Entertainment — 0.4%
Boyne USA, Inc.
4.750% 5/15/29 (c)		195,000		187,200
Caesars Entertainment, Inc.
4.625% 10/15/29 (c)		70,000		65,687
Cedar Fair LP
5.250% 7/15/29 (d)		75,000		73,877
Lions Gate Capital Holdings LLC
5.500% 4/15/29 (c)		80,000		77,200
Magallanes, Inc.
3.755% 3/15/27 (c)		175,000		174,668
Midwest Gaming Borrower LLC/Midwest Gaming Finance Corp.
4.875% 5/01/29 (c)		65,000		60,186
Premier Entertainment Sub LLC/Premier Entertainment Finance Corp.
5.625% 9/01/29 (c)		105,000		89,898
5.875% 9/01/31 (c)		105,000		89,775
Scientific Games Holdings LP/Scientific Games US FinCo, Inc.
6.625% 3/01/30 (c)		120,000		118,294
Scientific Games International, Inc.
7.250% 11/15/29 (c)		75,000		78,656
				1,015,441
Environmental Controls — 0.0%
Madison IAQ LLC
4.125% 6/30/28 (c)		85,000		78,413
5.875% 6/30/29 (c)		70,000		62,125
				140,538
Food — 0.4%
Performance Food Group, Inc.

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
4.250% 8/01/29 (c)	$	65,000	$	59,231
5.500% 10/15/27 (c)		115,000		114,569
Post Holdings, Inc.
4.625% 4/15/30 (c)		110,000		99,049
Smithfield Foods, Inc.
3.000% 10/15/30 (c)		35,000		31,769
4.250% 2/01/27 (c)		360,000		364,370
Sysco Corp.
3.300% 2/15/50		370,000		323,070
United Natural Foods, Inc.
6.750% 10/15/28 (c)		75,000		76,313
US Foods, Inc.
4.625% 6/01/30 (c)		140,000		129,850
				1,198,221
Gas — 0.2%
The Brooklyn Union Gas Co.
4.487% 3/04/49 (c)		425,000		427,239
The East Ohio Gas Co.
3.000% 6/15/50 (c)		45,000		38,849
				466,088
Health Care – Products — 0.2%
Mozart Debt Merger Sub, Inc.
5.250% 10/01/29 (c)		135,000		126,176
Ortho-Clinical Diagnostics, Inc. / Ortho-Clinical Diagnostics SA
7.250% 2/01/28 (c)		84,000		86,520
Thermo Fisher Scientific, Inc.
1.215% 10/18/24		465,000		447,583
				660,279
Health Care – Services — 0.6%
Anthem, Inc.
2.375% 1/15/25		210,000		207,224
Centene Corp.
2.500% 3/01/31		380,000		336,300
3.000% 10/15/30		60,000		55,335
CHS/Community Health Systems, Inc.
6.000% 1/15/29 (c)		95,000		96,111
6.875% 4/15/29 (c) (d)		100,000		98,250
HCA, Inc.
4.125% 6/15/29		195,000		198,786
Health Care Service Corp.
3.200% 6/01/50 (c)		145,000		126,736
Legacy LifePoint Health LLC
4.375% 2/15/27 (c)		90,000		87,075
ModivCare Escrow Issuer, Inc.
5.000% 10/01/29 (c)		35,000		32,627
Radiology Partners, Inc.
9.250% 2/01/28 (c)		95,000		95,000
RP Escrow Issuer LLC
5.250% 12/15/25 (c)		135,000		131,825
Select Medical Corp.
6.250% 8/15/26 (c)		150,000		154,938

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Tenet Healthcare Corp.
6.125% 10/01/28 (c)	$	130,000	$	132,112
				1,752,319
Home Builders — 0.0%
Mattamy Group Corp.
4.625% 3/01/30 (c)		120,000		112,717
Household Products & Wares — 0.1%
Kronos Acquisition Holdings, Inc. / KIK Custom Products, Inc.
5.000% 12/31/26 (c)		100,000		91,840
7.000% 12/31/27 (c) (d)		65,000		53,138
				144,978
Housewares — 0.0%
SWF Escrow Issuer Corp.
6.500% 10/01/29 (c)		110,000		95,062
Insurance — 0.7%
Acrisure LLC / Acrisure Finance, Inc.
4.250% 2/15/29 (c)		55,000		50,052
Alliant Holdings Intermediate LLC / Alliant Holdings Co-Issuer
6.750% 10/15/27 (c)		80,000		79,200
AmWINS Group, Inc.
4.875% 6/30/29 (c)		105,000		100,275
Athene Global Funding SOFR + .560%
0.761% FRN 8/19/24 (c)		465,000		457,423
Berkshire Hathaway Finance Corp.
2.850% 10/15/50		150,000		129,787
3.850% 3/15/52		90,000		91,978
Brighthouse Financial Global Funding
1.000% 4/12/24 (c)		145,000		138,971
2.000% 6/28/28 (c)		170,000		151,587
GTCR AP Finance, Inc.
8.000% 5/15/27 (c)		95,000		96,107
Prudential Financial, Inc.
3.905% 12/07/47		190,000		189,267
Willis North America, Inc.
4.500% 9/15/28		375,000		386,006
				1,870,653
Internet — 0.2%
Expedia Group, Inc.
2.950% 3/15/31		100,000		92,507
3.800% 2/15/28		205,000		204,261
5.000% 2/15/26		105,000		110,047
Uber Technologies, Inc.
4.500% 8/15/29 (c)		65,000		61,051
				467,866
Investment Companies — 0.2%
Ares Capital Corp.
2.150% 7/15/26		210,000		190,034

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Temasek Financial I Ltd. Co.
1.000% 10/06/30 (c)	$	350,000	$	299,850
				489,884
Iron & Steel — 0.1%
CAP SA
3.900% 4/27/31 (c)		200,000		181,202
Leisure Time — 0.2%
Carnival Corp.
5.750% 3/01/27 (c)		290,000		276,275
NCL Corp. Ltd.
5.875% 2/15/27 (c)		65,000		64,025
Viking Cruises Ltd.
5.875% 9/15/27 (c)		160,000		145,827
				486,127
Lodging — 0.2%
Marriott International, Inc.
2.750% 10/15/33		255,000		225,083
3.125% 6/15/26		230,000		227,560
				452,643
Machinery – Construction & Mining — 0.1%
The Weir Group PLC
2.200% 5/13/26 (c)		245,000		229,101
Machinery – Diversified — 0.1%
Flowserve Corp.
2.800% 1/15/32		250,000		221,148
Media — 0.6%
CCO Holdings LLC/CCO Holdings Capital Corp.
4.250% 1/15/34 (c)		65,000		56,452
4.750% 3/01/30 (c)		105,000		100,763
4.750% 2/01/32 (c)		65,000		60,583
Cengage Learning, Inc.
9.500% 6/15/24 (c)		85,000		84,787
Charter Communications Operating LLC/Charter Communications Operating Capital
3.500% 3/01/42		205,000		169,646
4.908% 7/23/25		215,000		223,204
Comcast Corp.
3.400% 4/01/30		220,000		222,842
3.950% 10/15/25		155,000		160,267
Diamond Sports Group LLC / Diamond Sports Finance Co.
5.375% 8/15/26 (c)		50,000		19,375
DIRECTV Financing LLC / DIRECTV Financing Co-Obligor, Inc.
5.875% 8/15/27 (c)		60,000		59,058
DISH DBS Corp.
5.125% 6/01/29		60,000		51,095
5.750% 12/01/28 (c)		70,000		66,238
GCI LLC
4.750% 10/15/28 (c)		90,000		88,120
McGraw-Hill Education, Inc.
5.750% 8/01/28 (c)		70,000		66,764
News Corp.
5.125% 2/15/32 (c)		40,000		40,192

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Scripps Escrow, Inc.
5.875% 7/15/27 (c)	$	95,000	$	95,524
Univision Communications, Inc.
4.500% 5/01/29 (c)		65,000		61,873
				1,626,783
Mining — 0.3%
Arconic Corp.
6.125% 2/15/28 (c)		130,000		130,438
Freeport-McMoRan, Inc.
5.450% 3/15/43		190,000		212,819
Glencore Funding LLC
1.625% 4/27/26 (c)		215,000		198,540
3.375% 9/23/51 (c)		155,000		130,253
Vedanta Resources Finance II PLC
9.250% 4/23/26 (c)		200,000		172,500
				844,550
Oil & Gas — 1.3%
BP Capital Markets America, Inc.
2.939% 6/04/51		155,000		132,088
3.001% 3/17/52 (d)		205,000		174,636
Chesapeake Energy Corp.
5.875% 2/01/29 (c)		100,000		103,250
CNX Resources Corp.
6.000% 1/15/29 (c)		80,000		80,800
Continental Resources, Inc.
2.268% 11/15/26 (c)		170,000		158,734
Ecopetrol SA
5.875% 5/28/45		50,000		43,813
5.875% 11/02/51		300,000		254,628
Exxon Mobil Corp.
4.227% 3/19/40		205,000		221,666
Gran Tierra Energy International Holdings Ltd.
6.250% 2/15/25 (c)		200,000		185,250
Hilcorp Energy I LP / Hilcorp Finance Co.
5.750% 2/01/29 (c)		45,000		45,027
6.250% 11/01/28 (c)		100,000		101,285
Marathon Petroleum Corp.
5.125% 12/15/26		165,000		175,809
MEG Energy Corp.
5.875% 2/01/29 (c)		15,000		15,162
7.125% 2/01/27 (c)		105,000		109,935
Occidental Petroleum Corp.
6.125% 1/01/31 (d)		85,000		95,731
6.450% 9/15/36		50,000		58,919
6.625% 9/01/30		60,000		68,850
Parkland Corp.
4.500% 10/01/29 (c)		90,000		83,443
Patterson-UTI Energy, Inc.
3.950% 2/01/28		200,000		187,209
Petrobras Global Finance BV
5.500% 6/10/51 (d)		340,000		291,754
Petroleos del Peru SA
4.750% 6/19/32 (c)		200,000		179,100
Petroleos Mexicanos
6.750% 9/21/47		150,000		121,935

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pioneer Natural Resources Co.
1.900% 8/15/30	$	150,000	$	132,988
Qatar Energy
2.250% 7/12/31 (c)		200,000		184,028
Southwestern Energy Co.
4.750% 2/01/32		70,000		69,913
5.375% 2/01/29		75,000		76,219
Sunoco LP/Sunoco Finance Corp.
4.500% 5/15/29		35,000		33,020
6.000% 4/15/27		90,000		91,687
Transocean Poseidon Ltd.
6.875% 2/01/27 (c)		140,625		139,219
Transocean, Inc.
11.500% 1/30/27 (c)		36,000		37,170
Valero Energy Corp.
4.000% 6/01/52		75,000		70,446
				3,723,714
Oil & Gas Services — 0.2%
Halliburton Co.
2.920% 3/01/30 (d)		105,000		101,517
5.000% 11/15/45		100,000		108,538
USA Compression Partners LP/USA Compression Finance Corp.
6.875% 9/01/27		185,000		185,710
Weatherford International Ltd.
6.500% 9/15/28 (c)		70,000		72,098
				467,863
Packaging & Containers — 0.3%
Berry Global, Inc.
1.650% 1/15/27		150,000		136,797
CCL Industries, Inc.
3.050% 6/01/30 (c)		160,000		150,235
Packaging Corp. of America
3.400% 12/15/27		215,000		213,836
WRKCo, Inc.
3.750% 3/15/25		395,000		399,604
				900,472
Pharmaceuticals — 0.5%
AbbVie, Inc.
4.700% 5/14/45		410,000		444,933
Bausch Health Cos., Inc.
6.125% 2/01/27 (c)		50,000		50,368
6.250% 2/15/29 (c)		60,000		49,200
Bristol-Myers Squibb Co.
4.350% 11/15/47		220,000		241,154
Cigna Corp.
4.900% 12/15/48		230,000		257,594
CVS Health Corp.
5.050% 3/25/48		190,000		215,614
Endo Luxembourg Finance Co. I SARL / Endo US, Inc.
6.125% 4/01/29 (c)		65,000		59,312
Owens & Minor, Inc.
6.625% 4/01/30 (c)		95,000		97,756

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Viatris, Inc.
1.650% 6/22/25	$	145,000	$	135,092
				1,551,023
Pipelines — 1.4%
Antero Midstream Partners LP / Antero Midstream Finance Corp.
5.750% 3/01/27 (c)		54,000		54,993
Enbridge, Inc.
3.400% 8/01/51		195,000		172,719
Energy Transfer LP
3.900% 7/15/26		750,000		754,375
4.400% 3/15/27		130,000		132,352
4.750% 1/15/26		215,000		223,573
5.000% STEP 5/15/44		225,000		220,433
EQM Midstream Partners LP
4.750% 1/15/31 (c)		140,000		130,900
Fermaca Enterprises S de RL de CV
6.375% 3/30/38 (c)		200,563		190,785
Galaxy Pipeline Assets Bidco Ltd.
2.625% 3/31/36 (c)		200,000		179,277
2.940% 9/30/40 (c)		294,783		265,798
GNL Quintero SA
4.634% 7/31/29 (c)		220,600		223,084
Hess Midstream Operations LP
4.250% 2/15/30 (c)		130,000		122,668
5.125% 6/15/28 (c)		110,000		110,275
Kinder Morgan Energy Partners LP
6.950% 1/15/38		295,000		369,189
NGL Energy Operating LLC / NGL Energy Finance Corp.
7.500% 2/01/26 (c)		135,000		132,798
NGPL PipeCo LLC
3.250% 7/15/31 (c)		95,000		88,709
NuStar Logistics LP
6.375% 10/01/30		90,000		91,219
Oleoducto Central SA
4.000% 7/14/27 (c)		200,000		188,492
ONEOK, Inc.
3.400% 9/01/29		115,000		110,661
Sabine Pass Liquefaction LLC
5.000% 3/15/27		190,000		201,286
The Williams Cos., Inc.
3.500% 10/15/51		125,000		109,348
				4,072,934
Real Estate — 0.1%
Realogy Group LLC / Realogy Co-Issuer Corp.
5.250% 4/15/30 (c)		130,000		120,250
5.750% 1/15/29 (c)		70,000		66,145
				186,395
Real Estate Investment Trusts (REITS) — 1.4%
Agree LP
2.600% 6/15/33		135,000		118,918
Alexandria Real Estate Equities, Inc.
3.000% 5/18/51		200,000		168,189
American Tower Corp.

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3.375% 10/15/26	$	472,000	$	466,301
3.600% 1/15/28		345,000		342,087
Boston Properties LP
3.400% 6/21/29		195,000		193,326
Corporate Office Properties LP
2.900% 12/01/33		175,000		154,508
Crown Castle International Corp.
3.300% 7/01/30		35,000		33,485
3.650% 9/01/27		410,000		407,672
3.700% 6/15/26		700,000		704,671
4.000% 3/01/27		225,000		228,455
Equinix, Inc.
1.800% 7/15/27		245,000		223,116
Host Hotels & Resorts LP
2.900% 12/15/31		250,000		223,717
Invitation Homes Operating Partnership LP
2.700% 1/15/34		220,000		192,307
Iron Mountain, Inc.
4.500% 2/15/31 (c)		60,000		55,411
Office Properties Income Trust
2.400% 2/01/27		200,000		178,152
2.650% 6/15/26		90,000		82,400
Park Intermediate Holdings LLC / PK Domestic Property LLC / PK Finance Co-Issuer
4.875% 5/15/29 (c)		75,000		70,309
Sabra Health Care LP
3.200% 12/01/31 (d)		95,000		84,759
Vornado Realty LP
2.150% 6/01/26		95,000		88,902
				4,016,685
Retail — 0.7%
At Home Group, Inc.
7.125% 7/15/29 (c)		40,000		34,701
AutoNation, Inc.
3.850% 3/01/32		205,000		198,481
Dick's Sporting Goods, Inc.
3.150% 1/15/32		380,000		348,408
4.100% 1/15/52		100,000		85,300
Dollar Tree, Inc.
3.375% 12/01/51		40,000		34,380
4.000% 5/15/25		395,000		404,518
Ferrellgas LP / Ferrellgas Finance Corp.
5.375% 4/01/26 (c)		55,000		52,232
McDonald's Corp.
4.450% 3/01/47		205,000		220,047
Michaels Cos., Inc.
5.250% 5/01/28 (c)		35,000		32,134
Sonic Automotive, Inc.
4.625% 11/15/29 (c)		140,000		125,125
SRS Distribution, Inc.
4.625% 7/01/28 (c)		100,000		95,521
Staples, Inc.
7.500% 4/15/26 (c)		55,000		53,411
Suburban Propane Partners LP / Suburban Energy Finance Corp.
5.000% 6/01/31 (c)		125,000		117,187
Superior Plus LP / Superior General Partner, Inc.
4.500% 3/15/29 (c)		120,000		112,756

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Victoria's Secret & Co.
4.625% 7/15/29 (c)	$	175,000	$	157,500
				2,071,701
Semiconductors — 0.6%
Broadcom, Inc.
3.419% 4/15/33 (c)		351,000		328,160
Marvell Technology, Inc.
4.200% 6/22/23		410,000		416,764
NXP BV / NXP Funding LLC / NXP USA, Inc.
3.875% 6/18/26 (c)		220,000		221,145
Renesas Electronics Corp.
2.170% 11/25/26 (c)		410,000		382,226
TSMC Global Ltd.
1.250% 4/23/26 (c) (d)		255,000		236,086
				1,584,381
Software — 0.3%
Clarivate Science Holdings Corp.
4.875% 7/01/29 (c)		135,000		127,009
Minerva Merger Sub, Inc.
6.500% 2/15/30 (c)		140,000		136,136
Oracle Corp.
3.850% 4/01/60		340,000		278,864
VMware, Inc.
2.200% 8/15/31		225,000		198,127
Workday, Inc.
3.700% 4/01/29 (f)		95,000		95,116
				835,252
Telecommunications — 1.0%
AT&T, Inc.
2.750% 6/01/31		160,000		150,050
3.500% 9/15/53		619,000		543,641
3.550% 9/15/55		120,000		105,773
Avaya, Inc.
6.125% 9/15/28 (c) (d)		80,000		78,894
The Bell Telephone Co. of Canada or Bell Canada
3.650% 8/15/52		50,000		47,628
CommScope, Inc.
4.750% 9/01/29 (c)		80,000		73,800
Digicel Group Holdings Ltd.
7.000% (c) (e)		77,097		61,292
8.000% 4/01/25 (c)		55,246		48,341
Frontier Communications Holdings LLC
5.000% 5/01/28 (c)		60,000		57,600
5.875% 10/15/27 (c)		30,000		29,851
6.000% 1/15/30 (c) (d)		70,000		64,750
Intelsat Jackson Holdings S.A.
6.500% 3/15/30 (c)		65,000		64,837
KT Corp.
2.500% 7/18/26 (c)		200,000		194,906
Lumen Technologies, Inc.
5.125% 12/15/26 (c)		105,000		100,088
NBN Co. Ltd.
1.450% 5/05/26 (c)		200,000		185,308

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
T-Mobile USA, Inc.
2.250% 2/15/26	$	205,000	$	193,692
2.550% 2/15/31		500,000		453,465
3.375% 4/15/29		35,000		33,360
3.375% 4/15/29 (c)		15,000		14,297
3.400% 10/15/52 (c)		205,000		175,182
Verizon Communications, Inc.
2.650% 11/20/40		25,000		21,288
3.875% 3/01/52		65,000		65,367
				2,763,410
Transportation — 0.5%
CSX Corp.
3.800% 11/01/46		435,000		435,345
Empresa de Transporte de Pasajeros Metro SA
5.000% 1/25/47 (c)		750,000		754,687
FedEx Corp.
4.750% 11/15/45		180,000		192,204
				1,382,236
Trucking & Leasing — 0.1%
Penske Truck Leasing Co. LP/PTL Finance Corp.
4.200% 4/01/27 (c)		195,000		200,111
TOTAL CORPORATE DEBT (Cost $73,490,479)				69,302,911
MUNICIPAL OBLIGATIONS — 0.1%
State of California BAB, General Obligation
7.550% 4/01/39		190,000		281,741
TOTAL MUNICIPAL OBLIGATIONS (Cost $282,944)				281,741
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 26.1%
Commercial Mortgage-Backed Securities — 6.8%
BANK
Series 2020-BN28, Class AS, 2.140% 3/15/63		380,000		336,414
Series 2021-BN37, Class C, 3.109% VRN 11/15/64 (g)		181,000		166,160
Series 2022-BNK39, Class AS, 3.181% 2/15/55		302,000		290,344
Series 2017-BNK5, Class C, 4.240% VRN 6/15/60 (g)		200,000		195,506
Benchmark Mortgage Trust
Series 2020-B19, Class AS, 2.148% 9/15/53		380,000		338,205
Series 2022-B32, Class AS, 3.411% VRN 1/15/55 (g)		262,000		256,476
Series 2020-B18, Class AGNF, 4.139% 7/15/53 (c)		378,000		334,802
BMO Mortgage Trust, Series 2022-C1, Class AS
3.676% 2/15/55		309,000		310,812
BX Commercial Mortgage Trust
Series 2021-VOLT, Class F, 1 mo. USD LIBOR + 2.400% 2.797% FRN 9/15/36 (c)		405,000		390,699
Series 2021-21M, Class H, 1 mo. USD LIBOR + 4.010% 4.407% FRN 10/15/36 (c)		396,000		388,371
BX Trust, Series 2019-OC11, Class E,
4.076% VRN 12/09/41 (c) (g)		374,000		324,125
CFCRE Commercial Mortgage Trust, Series 2016-C3, Class XA,
0.987% VRN 1/10/48 (g)		5,394,045		168,016
Citigroup Commercial Mortgage Trust

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2016-GC36, Class D, 2.850% 2/10/49 (c)	$	201,000	$	137,568
Series 2019-GC41, Class B, 3.199% 8/10/56		163,000		155,806
Series 2020-420K, Class D, 3.312% VRN 11/10/42 (c) (g)		200,000		175,996
Series 2020-420K, Class E, 3.312% VRN 11/10/42 (c) (g)		200,000		167,099
Series 2015-GC31, Class C, 4.040% VRN 6/10/48 (g)		700,000		671,576
Series 2017-C4, Class B, 4.096% VRN 10/12/50 (g)		340,000		337,673
Commercial Mortgage Pass-Through Certificates, Series 2016-CR28, Class C,
4.638% VRN 2/10/49 (g)		465,000		458,480
CSAIL Commercial Mortgage Trust
Series 2015-C1, Class XA, 0.822% VRN 4/15/50 (g)		7,954,864		143,714
Series 2019-C16, Class B, 3.885% 6/15/52		334,000		323,313
Series 2016-C6, Class B, 3.924% VRN 1/15/49 (g)		298,000		296,640
Series 2015-C4, Class C, 4.561% VRN 11/15/48 (g)		427,000		422,563
Series 2016-C6, Class C, 4.922% VRN 1/15/49 (g)		378,000		367,278
CSMC 2021-B33
Series 2021-B33, Class C, 3.645% VRN 10/10/43 (c) (g)		101,000		90,286
Series 2021-B33, Class B, 3.645% VRN 10/10/43 (c) (g)		300,000		279,274
DBGS Mortgage Trust, Series 2018-5BP, Class F, 1 mo. USD LIBOR + 2.600%
2.997% FRN 6/15/33 (c)		550,000		509,781
GS Mortgage Securities Trust
Series 2015-GS1, Class XA, 0.760% VRN 11/10/48 (g)		7,736,075		187,478
Series 2013-GC10, Class XA, 1.472% VRN 2/10/46 (g)		4,187,577		28,310
Series 2018-RIVR, Class C, 1 mo. USD LIBOR + 1.250% 1.647% FRN 7/15/35 (c)		167,000		161,949
Series 2014-GC26, Class D, 4.524% VRN 11/10/47 (c) (g)		763,000		532,178
Hospitality Mortgage Trust, Series 2019-HIT, Class F, 1 mo. USD LIBOR + 3.150%
3.547% FRN 11/15/36 (c)		397,354		379,535
JP Morgan Chase Commercial Mortgage Securities Trust
Series 2015-JP1, Class XA, 0.888% VRN 1/15/49 (g)		3,643,151		100,983
Series 2016-JP2, Class B, 3.460% 8/15/49		174,000		165,893
JPMBB Commercial Mortgage Securities Trust
Series 2015-C30, Class XA, 0.492% VRN 7/15/48 (g)		8,793,319		121,792
Series 2015-C29, Class XA, 0.603% VRN 5/15/48 (g)		6,169,280		94,989
Series 2014-C25, Class XA, 0.825% VRN 11/15/47 (g)		3,822,349		67,641
Series 2015-C28, Class XA, 0.961% VRN 10/15/48 (g)		6,507,934		134,783
Series 2015-C27, Class D, 3.797% VRN 2/15/48 (c) (g)		704,000		605,751
Series 2014-C23, Class D, 3.981% VRN 9/15/47 (c) (g)		391,000		368,775
Series 2015-C28, Class B, 3.986% 10/15/48		340,000		335,462
Series 2015-C29, Class C, 4.200% VRN 5/15/48 (g)		162,000		152,016
Series 2015-C33, Class C, 4.612% VRN 12/15/48 (g)		527,000		516,076
Series 2015-C32, Class C, 4.654% VRN 11/15/48 (g)		87,000		67,223
Series 2013-C17, Class C, 4.886% VRN 1/15/47 (g)		400,000		399,175
Med Trust 2021-MDLN, Series 2021-MDLN, Class D, 1 mo. USD LIBOR + 2.000%
2.397% FRN 11/15/38 (c)		396,000		387,336
MF1 Ltd., Series 2020-FL3, Class AS, 1 mo. TSFR + 2.964%
3.266% FRN 7/15/35 (c)		318,000		318,803
Morgan Stanley Bank of America Merrill Lynch Trust, Series 2015-C23, Class C,
4.144% VRN 7/15/50 (g)		650,000		625,144
Morgan Stanley Capital I Trust
Series 2015-UBS8, Class XA, 0.865% VRN 12/15/48 (g)		5,980,478		153,737
Series 2021-L6, Class C, 3.464% VRN 6/15/54 (g)		388,000		366,692
Natixis Commercial Mortgage Securities Trust, Series 2018-FL1, Class C, 1 mo. USD LIBOR + 2.200%
2.597% FRN 6/15/35 (c)		368,000		339,430

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

		Principal Amount		Value
SG Commercial Mortgage Securities Trust
Series 2016-C5, Class XA, 1.902% VRN 10/10/48 (g)		$	3,537,299	$	181,540
Series 2016-C5, Class B, 3.933% 10/10/48			411,000		396,922
SLG Office Trust
Series 2021-OVA, Class E, 2.851% 7/15/41 (c)			260,000		222,898
Series 2021-OVA, Class F, 2.851% 7/15/41 (c)			260,000		211,797
TTAN, Series 2021-MHC, Class F, 1 mo. USD LIBOR + 2.900%
3.297% FRN 3/15/38 (c)			384,429		369,065
UBS Commercial Mortgage Trust
Series 2017-C2, Class B, 3.993% VRN 8/15/50 (g)			332,000		321,588
Series 2017-C1, Class B, 4.036% 6/15/50			328,000		321,019
UBS-Barclays Commercial Mortgage Trust, Series 2013-C5, Class C,
4.074% VRN 3/10/46 (c) (g)			393,000		385,228
Wells Fargo Commercial Mortgage Trust
Series 2015-NXS2, Class XA, 0.647% VRN 7/15/58 (g)			9,766,638		168,705
Series 2015-P2, Class XA, 0.959% VRN 12/15/48 (g)			3,865,285		113,478
Series 2019-C53, Class XA, 1.011% VRN 10/15/52 (g)			4,309,709		248,949
Series 2016-C35, Class B, 3.438% 7/15/48			328,000		318,548
Series 2016-NXS6, Class B, 3.811% 11/15/49			248,000		244,399
Series 2017-C39, Class C, 4.118% 9/15/50			206,000		199,962
Series 2015-NXS4, Class C, 4.178% VRN 12/15/48 (g)			421,000		422,482
Series 2019-C50, Class C, 4.345% 5/15/52			409,000		370,213
Series 2016-LC24, Class C, 4.433% VRN 10/15/49 (g)			325,000		316,839
					19,461,760
Home Equity Asset-Backed Securities — 0.7%
GSAA Home Equity Trust, Series 2007-10, Class A2A
6.500% 11/25/37			3,554,867		2,043,271
Other Asset-Backed Securities — 10.8%
AASET US Ltd., Series 2018-1A, Class A
3.844% 1/16/38 (c)			466,907		322,167
Bain Capital Credit Clo Ltd., Series 2019-3A, Class DR, 3 mo. USD LIBOR + 3.100%
3.355% FRN 10/21/34 (c)			1,000,000		975,253
Blackbird Capital Aircraft, Series 2021-1A, Class B
3.446% 7/15/46 (c)			721,540		598,843
Blackbird Capital Aircraft Lease Securitization Ltd., Series 2016-1A, Class B,
5.682% STEP 12/16/41 (c)			711,025		620,115
BlueMountain CLO Ltd., Series 2015-3A, Class CR, 3 mo. USD LIBOR + 2.600%
2.854% FRN 4/20/31 (c)			1,000,000		936,332
Cent CLO 27 Ltd., Series 2018-27A, Class DR, 3 mo. USD LIBOR + 3.830%
4.082% FRN 1/25/35 (c)			500,000		502,339
CLI Funding VI LLC, Series 2020-3A, Class A
2.070% 10/18/45 (c)			206,875		192,152
Dividend Solar Loans LLC, Series 2018-1, Class B
4.290% 7/20/38 (c)			616,751		623,537
Dryden 40 Senior Loan Fund, Series 2015-40A, Class DR, 3 mo. USD LIBOR + 3.100%
3.606% FRN 8/15/31 (c)	��		500,000		495,422
Gilbert Park CLO Ltd.
Series 2017-1A, Class D, 3 mo. USD LIBOR + 2.950% 3.191% FRN 10/15/30 (c)			500,000		493,704
Series 2017-1A, Class E, 3 mo. USD LIBOR + 6.400% 6.641% FRN 10/15/30 (c)			1,000,000		978,299

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Grippen Park CLO Ltd., Series 2017-1A, Class D, 3 mo. USD LIBOR + 3.300%
3.554% FRN 1/20/30 (c)	$	1,000,000	$	994,752
Helios Issuer LLC, Series 2020-AA, Class A
2.980% 6/20/47 (c)		401,055		362,906
Hero Funding Trust, Series 2016-4A, Class A2
4.290% 9/20/47 (c)		127,403		127,480
Highbridge Loan Management Ltd., Series 13A-18, Class D, 3 mo. USD LIBOR + 3.000%
3.241% FRN 10/15/30 (c)		500,000		479,339
Invitation Homes Trust, Series 2018-SFR1, Class C, 1 mo. USD LIBOR + 1.250%
1.691% FRN 3/17/37 (c)		1,144,836		1,138,063
JOL Air Ltd., Series 2019-1, Class A
3.967% 4/15/44 (c)		407,700		371,317
Long Beach Mortgage Loan Trust, Series 2006-7, Class 1A, 1 mo. USD LIBOR + .155%
0.612% FRN 8/25/36		2,757,390		1,733,338
MACH 1 Cayman Ltd., Series 2019-1, Class A
3.474% 10/15/39 (c)		351,226		325,992
Madison Park Funding Ltd., Series 2014-14A, Class DRR, 3 mo. USD LIBOR + 2.950%
3.209% FRN 10/22/30 (c)		500,000		491,279
Marble Point CLO XXI Ltd., Series 2021-3A, Class D1, 3 mo. USD LIBOR + 3.500%
3.741% FRN 10/17/34 (c)		500,000		500,217
Merrill Lynch Mortgage Investors Trust, Series 2006-OPT1, Class A2C, 1 mo. USD LIBOR + .150%
0.607% FRN 8/25/37		1,351,629		1,299,335
Mosaic Solar Loans LLC
Series 2021-3A, Class B, 1.920% 6/20/52 (c)		467,118		425,613
Series 2020-1A, Class A, 2.100% 4/20/46 (c)		299,049		286,068
Series 2020-2A, Class B, 2.210% 8/20/46 (c)		334,048		314,862
Series 2017-1A, Class A, 4.450% 6/20/42 (c)		254,675		255,213
Oak Hill Credit Partners Ltd., Series 2018-1A, Class D, 3 mo. USD LIBOR + 3.050%
3.304% FRN 10/20/30 (c)		500,000		491,876
Octagon Investment Partners 30 Ltd., Series 2017-1A, Class CR, 3 mo. USD LIBOR + 3.300%
3.554% FRN 3/17/30 (c)		1,000,000		992,734
Pagaya AI Debt Selection Trust, Series 2021-2, Class NOTE
3.000% 1/25/29 (c)		571,231		557,629
Primose Funding LLC, Series 2019-1A, Class A2
4.475% 7/30/49 (c)		977,500		954,511
Sound Point CLO XXIII, Series 2019-2A, Class DR, 3 mo. USD LIBOR + 3.300%
3.541% FRN 7/15/34 (c)		500,000		493,946
Sprite Ltd.
Series 2021-1, Class A, 3.750% 11/15/46 (c)		484,850		447,077
Series 2017-1, Class A, 4.250% 12/15/37 (c)		1,960		1,916
START Ireland, Series 2019-1, Class A
4.089% 3/15/44 (c)		285,729		264,495
Sunnova Helios VII Issuer LLC, Series 2021-C, Class C
2.630% 10/20/48 (c)		486,125		466,239
Sunnova Sol III Issuer LLC, Series 2021-1, Class A
2.580% 4/28/56 (c)		479,439		437,016
Sunrun Atlas Issuer LLC, Series 2019-2, Class A
3.610% 2/01/55 (c)		705,293		692,145

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Symphony CLO Ltd., Series 2015-16A, Class DR, 3 mo. USD LIBOR + 3.050%
3.291% FRN 10/15/31 (c)	$	500,000	$	488,768
Textainer Marine Containers Ltd., Series 2020-2A, Class A
2.100% 9/20/45 (c)		428,847		402,767
THL Credit Wind River CLO Ltd., Series 2017-1A, Class DR, 3 mo. USD LIBOR + 3.720%
3.961% FRN 4/18/36 (c)		1,000,000		973,925
Thunderbolt Aircraft Lease Ltd.
Series 2018-A, Class A, 4.147% STEP 9/15/38 (c)		411,642		367,040
Series 2017-A, Class A, 4.212% STEP 5/17/32 (c)		779,350		694,769
TIF Funding II LLC, Series 2021-1A, Class A
1.650% 2/20/46 (c)		909,583		826,061
Triumph Rail LLC, Series 2021-2, Class A
2.150% 6/19/51 (c)		730,684		676,082
Upstart Securitization Trust
Series 2021-3, Class B, 1.660% 7/20/31 (c)		500,000		478,416
Series 2021-4, Class B, 1.840% 9/20/31 (c)		700,000		657,894
Series 2021-3, Class C, 3.280% 7/20/31 (c)		500,000		476,209
USQ Rail LLC, Series 2021-1A, Class A
2.250% 2/28/51 (c)		948,407		877,474
Vantage Data Centers LLC, Series 2020-2A, Class A2
1.992% 9/15/45 (c)		375,000		338,527
Vault DI Issuer LLC, Series 2021-1A, Class A2
2.804% 7/15/46 (c)		500,000		465,540
Washington Mutural Asset-Backed Certificates Trust, Series 2006-HE5, Class 2A2, 1 mo. USD LIBOR + .180%
0.637% FRN 10/25/36		58,897		27,921
Wellfleet CLO X Ltd., Series 2019-XA, Class A1R, 3 mo. USD LIBOR + 1.170%
1.424% FRN 7/20/32 (c)		500,000		494,441
Willis Engine Structured Trust IV, Series 2018-A, Class A,
4.750% STEP 9/15/43 (c)		700,606		647,866
				30,537,221
Student Loans Asset-Backed Securities — 0.4%
College Avenue Student Loans LLC, Series 2018-A, Class A1, 1 mo. USD LIBOR + 1.200%
1.657% FRN 12/26/47 (c)		260,135		258,059
SoFi Professional Loan Program LLC
Series 2017-D, Class BFX, 3.610% 9/25/40 (c)		350,000		346,259
Series 2018-B, Class BFX, 3.830% 8/25/47 (c)		500,000		481,879
				1,086,197
Whole Loan Collateral Collateralized Mortgage Obligations — 7.0%
CHL GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.750%
3.207% FRN 5/25/23 (c)		500,000		495,011
Citigroup Mortgage Loan Trust, Series 2007-AR5, Class 1A2A,
3.037% VRN 4/25/37 (g)		742,002		686,043
Countrywide Alternative Loan Trust
Series 2006-13T1, Class A11, 6.000% 5/25/36		1,719,334		1,007,475
Series 2006-12CB, Class A5, 6.000% 5/25/36		1,981,968		1,357,142
Series 2006-36T2, Class 2A1, 6.250% 12/25/36		3,198,156		1,808,552
Countrywide Home Loans Mortgage Pass-Through Trust
Series 2007-HYB2, Class 3A1, 2.674% VRN 2/25/47 (g)		890,351		818,406
Series 2007-3, Class A21, 6.000% 4/25/37		1,401,504		909,968

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2007-14, Class A6, 6.000% 9/25/37	$	1,221,087	$	838,444
HarborView Mortgage Loan Trust, Series 2006-11, Class A1A, 1 mo. USD LIBOR + .340%
0.789% FRN 12/19/36		699,887		628,162
Imperial Fund Mortgage Trust, Series 2021-NQM2, Class M1,
2.489% VRN 9/25/56 (c) (g)		1,028,000		901,772
IndyMac INDX Mortgage Loan Trust, Series 2007-AR5, Class 2A1,
2.941% VRN 5/25/37 (g)		1,824,783		1,590,134
Lehman XS Trust, Series 2007-12N, Class 1A3A, 1 mo. USD LIBOR + .200%
0.657% FRN 7/25/47		1,928,759		1,916,395
Morgan Stanley Mortgage Loan Trust, Series 2005-3AR, Class 2A1,
2.500% VRN 7/25/35 (g)		267,466		245,702
Nomura Asset Acceptance Corp. Alternative Loan Trust, Series 2006-AR1, Class 2A1,
2.996% VRN 2/25/36 (g)		1,594,097		1,309,675
RBSSP Resecuritization Trust, Series 2009-5, Class 2A3,
6.500% VRN 10/26/37 (c) (g)		721,219		408,304
RFMSI Trust, Series 2007-S4, Class A5, 1 mo. USD LIBOR + .600%
6.000% FRN 4/25/37		186,137		174,651
Structured Adjustable Rate Mortgage Loan Trust, Series 2008-1, Class A2,
2.722% VRN 10/25/37 (g)		612,262		516,075
Verus Securitization Trust
Series 2021-4, Class M1, 2.195% VRN 7/25/66 (c) (g)		1,000,000		875,837
Series 2021-R1, Class M1, 2.338% 10/25/63 (c)		1,500,000		1,432,392
Voyager OPTONE Delaware Trust, Series 2009-1, Class SAC3,
10.383% VRN 2/25/38 (c) (g)		1,862,871		1,409,166
Washington Mutual Mortgage Pass-Through Certificates Trust, Series 2006-4, Class 3A5,
6.850% STEP 5/25/36		748,273		693,402
				20,022,708
Whole Loan Collateral Planned Amortization Classes — 0.4%
Countrywide Alternative Loan Trust, Series 2006-19CB, Class A15
6.000% 8/25/36		1,398,993		1,039,807
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $83,071,303)				74,190,964
SOVEREIGN DEBT OBLIGATIONS — 1.6%
Abu Dhabi Government International Bond
3.125% 4/16/30 (c)		200,000		204,220
Brazilian Government International Bond
3.750% 9/12/31		300,000		270,750
5.625% 2/21/47		300,000		284,076
Chile Government International Bond
2.550% 1/27/32 (d)		200,000		187,910
3.100% 5/07/41 (d)		200,000		176,574
Colombia Government International Bond
3.250% 4/22/32		200,000		167,080
4.125% 5/15/51 (d)		250,000		189,093
5.000% 6/15/45		200,000		168,636
Dominican Republic International Bond
6.000% 2/22/33 (c)		250,000		244,002
Indonesia Government International Bond
3.700% 10/30/49		250,000		240,923
Mexico Government International Bond
2.659% 5/24/31 (d)		200,000		181,938

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3.750% 1/11/28	$	535,000	$	544,780
4.280% 8/14/41		450,000		420,367
Panama Government International Bond
2.252% 9/29/32		200,000		176,894
3.870% 7/23/60		200,000		175,238
4.300% 4/29/53		200,000		192,228
Philippine Government International Bond
1.648% 6/10/31		400,000		355,910
Saudi Government International Bond
2.250% 2/02/33 (c)		300,000		276,000
				4,456,619
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $4,881,042)				4,456,619
U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (h) — 12.1%
Collateralized Mortgage Obligations — 4.8%
Federal Home Loan Mortgage Corp. REMICS
Series 4481, Class B, 3.000% 12/15/42		1,370,382		1,414,181
Series 4483, Class CA, 3.000% 6/15/44		2,064,910		2,054,048
Federal Home Loan Mortgage Corp. SCRT (g) Series 2018-2, Class HV 3.000% 11/25/57		2,634,863		2,596,548
Federal Home Loan Mortgage Corp. Strips Series 379, Class C1 1.500% 1/25/51		1,559,584		151,412
Federal National Mortgage Association
Series 2018-18, Class ZG, 3.000% 6/25/50		2,480,211		2,307,189
Series 2021-48, Class NS, 30 day SOFR + 3.650% 3.551% FRN 8/25/51		1,083,544		107,211
Federal National Mortgage Association REMICS
Series 2018-21, Class PO, 0.000% 4/25/48		750,993		623,463
Series 2018-44, Class PZ, 3.500% 6/25/48		2,972,736		3,022,915
Government National Mortgage Association
Series 2021-218, Class IO, 0.962% VRN 10/16/61 (g)		1,231,130		105,784
Series 2021-164, Class IO, 0.967% VRN 10/16/63 (g)		1,264,296		106,843
Series 2020-175, Class GI, 2.000% 11/20/50		1,005,240		112,763
Series 2020-115, Class IG, 2.500% 8/20/50		1,079,361		148,968
Series 2021-140, Class IH, 2.500% 8/20/51		1,027,715		154,237
Series 2021-176, Class SD, 30 day SOFR + 2.700% 2.650% FRN 9/20/51		2,486,734		85,631
Series 2021-98, Class IG, 3.000% 6/20/51		1,091,060		161,346
Series 2021-137, Class IQ, 3.000% 8/20/51		1,596,264		228,992
Series 2021-103, Class SA, 30 day SOFR + 3.250% 3.200% FRN 4/20/51		1,386,411		82,292
Series 2021-117, Class ID, 3.500% 6/20/51		921,100		104,073
				13,567,896
Pass-Through Securities — 7.3%
Federal Home Loan Mortgage Corp.
Pool #SD0715 2.000% 9/01/51		2,060,809		1,928,321
Pool #G08520 2.500% 1/01/43		566,459		548,700
Pool #SD8174 3.000% 10/01/51		2,542,207		2,494,126
Pool #G08632 3.500% 3/01/45		754,287		768,958
Federal National Mortgage Association
Pool #FM4052 2.500% 9/01/50		2,732,129		2,629,127
Pool #MA4256 2.500% 2/01/51		1,862,338		1,783,398
Pool #FM9846 2.500% 12/01/51		644,181		615,970
Pool #FS0174 2.500% 1/01/52		671,702		642,285
Pool #MA2248 3.000% 4/01/45		340,299		335,478
Pool #AS7661 3.000% 8/01/46		329,802		324,511

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #FM9934 3.000% 12/01/48	$	1,020,679	$	1,013,236
Pool #FM9564 3.000% 2/01/50		1,167,283		1,158,771
Pool #AX2501 4.000% 10/01/44		714,961		743,691
Pool #FM8214 4.000% 5/01/49		1,022,274		1,051,693
Pool #FM8972 4.000% 6/01/49		559,709		577,128
Federal National Mortgage Association TBA
Pool #BS4941 2.460% 4/01/32 (f)		987,000		949,987
Government National Mortgage Association II
Pool # 785662 2.500% 10/20/51		2,469,667		2,394,296
Pool # 785764 2.500% 11/20/51		737,725		715,211
				20,674,887
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $35,669,802)				34,242,783
U.S. TREASURY OBLIGATIONS — 21.9%
U.S. Treasury Bonds & Notes — 21.9%
U.S. Treasury Bond
1.250% 5/15/50		19,000,000		14,208,437
2.250% 5/15/41		2,370,000		2,241,093
2.250% 2/15/52		4,220,000		4,044,608
2.375% 2/15/42		3,340,000		3,223,621
U.S. Treasury Note
0.125% 1/31/23		130,000		128,461
0.125% 3/31/23		3,750,000		3,691,731
0.125% 4/30/23		4,090,000		4,017,601
0.125% 7/31/23		1,150,000		1,121,393
0.375% 11/30/25		3,030,000		2,804,293
1.250% 3/31/28		1,450,000		1,354,023
1.500% 2/15/25		455,000		442,806
1.750% 3/15/25		5,560,000		5,447,933
1.875% 2/15/32		2,550,000		2,448,398
2.250% 3/31/24		5,260,000		5,256,097
2.375% 3/31/29		5,245,000		5,234,347
2.500% 3/31/27		6,460,000		6,482,713
				62,147,555
TOTAL U.S. TREASURY OBLIGATIONS (Cost $64,002,193)				62,147,555
TOTAL BONDS & NOTES (Cost $274,840,022)				257,932,671
	Number of Shares
MUTUAL FUNDS — 2.8%
Diversified Financial Services — 2.8%
DoubleLine Global Bond Fund		614,210		5,687,585
State Street Navigator Securities Lending Government Money Market Portfolio (i)		2,264,805		2,264,805
TOTAL MUTUAL FUNDS (Cost $8,615,737)				7,952,390
TOTAL LONG-TERM INVESTMENTS (Cost $283,455,759)				265,885,061

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
SHORT-TERM INVESTMENTS — 5.6%
Repurchase Agreement — 5.5%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/22, 0.000%, due 4/01/22 (j)	$	15,794,615	$	15,794,615
U.S. Treasury Bill — 0.1%
U.S. Treasury Bill
0.010% 6/30/22 (k)		260,000		259,665
TOTAL SHORT-TERM INVESTMENTS (Cost $16,054,289)				16,054,280
TOTAL INVESTMENTS — 99.3% (Cost $299,510,048) (l)				281,939,341
Less Unfunded Loan Commitments — (0.0%)				(97,255)
NET INVESTMENTS — 99.3% (Cost $299,412,793)				281,842,086
Other Assets/(Liabilities) — 0.7%				1,961,436
NET ASSETS — 100.0%			$	283,803,522

Abbreviation Legend

BAB Build America Bonds

CLO Collateralized Loan Obligation

FRN Floating Rate Note

REMICS Real Estate Mortgage Investment Conduits

SCRT Seasoned Credit Risk Transfer

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) All or a portion of the security represents unsettled loan commitments at March 31, 2022 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, 2022, the aggregate market value of these securities amounted to $70,528,878 or 24.85% of net assets.

(d) Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2022, was $3,205,584 or 1.13% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $1,017,997 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).

(e) Security is perpetual and has no stated maturity date.

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

(g) Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions. These securities do not indicate a reference rate and spread in their description above. The rates shown are the current interest rates at March 31, 2022.

(h) May contain securities that are issued by a U.S. Government Agency, but are unsecured and are not guaranteed by a U.S. Government Agency.

(i) Represents investment of security lending cash collateral. (Note 2).

(j) Maturity value of $15,794,615. Collateralized by U.S. Government Agency obligations with a rate of 0.375%, maturity date of 9/15/24, and an aggregate market value, including accrued interest, of $16,110,556.

(k) The rate shown represents yield-to-maturity.

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

Currency Legend

USD U.S. Dollar

MML Equity Fund —  Portfolio of Investments

March 31, 2022 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.3%
COMMON STOCK — 98.2%
Basic Materials — 3.4%
Chemicals — 2.0%
Celanese Corp.		9,100	$	1,300,117
Dow, Inc.		21,500		1,369,980
DuPont de Nemours, Inc.		29,600		2,177,968
Eastman Chemical Co.		10,600		1,187,836
FMC Corp.		7,300		960,461
Huntsman Corp.		6,300		236,313
International Flavors & Fragrances, Inc.		22,765		2,989,727
Linde PLC		10,024		3,201,966
LyondellBasell Industries NV Class A		9,600		987,072
The Mosaic Co.		29,300		1,948,450
Nutrien Ltd.		11,344		1,179,663
Olin Corp.		4,500		235,260
				17,774,813
Iron & Steel — 0.6%
Nucor Corp.		23,300		3,463,545
Reliance Steel & Aluminum Co.		4,900		898,415
Steel Dynamics, Inc.		16,300		1,359,909
				5,721,869
Mining — 0.8%
BHP Group Ltd. Sponsored ADR		12,500		965,625
Freeport-McMoRan, Inc.		42,600		2,118,924
Newmont Corp.		45,600		3,622,920
				6,707,469
				30,204,151
Communications — 5.8%
Advertising — 0.3%
The Interpublic Group of Cos., Inc.		17,300		613,285
Omnicom Group, Inc.		16,600		1,409,008
				2,022,293
Internet — 2.0%
Alphabet, Inc. Class C (a)		4,226		11,803,176
Amazon.com, Inc. (a)		50		162,997
Booking Holdings, Inc. (a)		960		2,254,512
eBay, Inc.		53,500		3,063,410

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
NortonLifeLock, Inc.		31,800	$	843,336
				18,127,431
Media — 1.7%
Charter Communications, Inc. Class A (a)		1,200		654,624
Comcast Corp. Class A		276,500		12,945,730
Fox Corp. Class A		26,100		1,029,645
Nexstar Media Group, Inc. Class A		1,200		226,176
The Walt Disney Co. (a)		3,200		438,912
				15,295,087
Telecommunications — 1.8%
Cisco Systems, Inc.		254,400		14,185,344
Corning, Inc.		7,900		291,589
Motorola Solutions, Inc.		8,020		1,942,444
				16,419,377
				51,864,188
Consumer, Cyclical — 7.5%
Apparel — 0.1%
Capri Holdings Ltd. (a)		8,600		441,954
Ralph Lauren Corp.		1,400		158,816
Skechers U.S.A., Inc. Class A (a)		7,200		293,472
Tapestry, Inc.		6,500		241,475
				1,135,717
Auto Manufacturers — 0.7%
Ford Motor Co.		301,600		5,100,056
PACCAR, Inc.		10,200		898,314
				5,998,370
Auto Parts & Equipment — 0.1%
BorgWarner, Inc.		6,800		264,520
Lear Corp.		3,600		513,324
				777,844
Distribution & Wholesale — 0.1%
LKQ Corp.		23,500		1,067,135
Home Builders — 0.6%
D.R. Horton, Inc.		28,200		2,101,182
Lennar Corp. Class A		21,400		1,737,038
NVR, Inc. (a)		200		893,454
PulteGroup, Inc.		20,800		871,520
				5,603,194
Home Furnishing — 0.1%
Whirlpool Corp.		4,800		829,344
Leisure Time — 0.1%
Brunswick Corp.		6,000		485,340

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Lodging — 0.0%
Boyd Gaming Corp.		3,200	$	210,496
Retail — 5.7%
Advance Auto Parts, Inc.		5,100		1,055,496
AutoNation, Inc. (a)		6,800		677,144
AutoZone, Inc. (a)		1,500		3,066,870
Bath & Body Works, Inc.		6,400		305,920
BJ's Wholesale Club Holdings, Inc. (a)		8,200		554,402
Darden Restaurants, Inc.		3,700		491,915
Dick's Sporting Goods, Inc. (b)		3,600		360,072
Dollar General Corp.		10,200		2,270,826
Genuine Parts Co.		11,200		1,411,424
Lowe's Cos., Inc.		56,700		11,464,173
Macy's, Inc.		8,500		207,060
McDonald's Corp.		8,800		2,176,064
O'Reilly Automotive, Inc. (a)		5,500		3,767,280
Penske Automotive Group, Inc.		4,900		459,228
Target Corp.		38,800		8,234,136
Walgreens Boots Alliance, Inc.		52,000		2,328,040
Walmart, Inc.		44,977		6,697,975
Williams-Sonoma, Inc.		4,600		667,000
Yum! Brands, Inc.		42,383		5,023,657
				51,218,682
				67,326,122
Consumer, Non-cyclical — 28.8%
Agriculture — 2.6%
Altria Group, Inc.		111,500		5,825,875
Archer-Daniels-Midland Co.		43,100		3,890,206
Bunge Ltd.		10,800		1,196,748
Darling Ingredients, Inc. (a)		22,184		1,783,150
Philip Morris International, Inc.		109,100		10,248,854
				22,944,833
Beverages — 1.0%
The Coca-Cola Co.		72,500		4,495,000
Keurig Dr Pepper, Inc.		118,950		4,508,205
Molson Coors Beverage Co. Class B		5,900		314,942
				9,318,147
Biotechnology — 1.5%
Amgen, Inc.		16,300		3,941,666
Bio-Rad Laboratories, Inc. Class A (a)		2,100		1,182,783
Gilead Sciences, Inc.		71,700		4,262,565
Regeneron Pharmaceuticals, Inc. (a)		6,400		4,469,888
				13,856,902
Commercial Services — 0.5%
AMERCO		1,700		1,014,798
Booz Allen Hamilton Holding Corp.		7,700		676,368
Service Corp. International		13,600		895,152

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
United Rentals, Inc. (a)		4,400	$	1,562,924
				4,149,242
Cosmetics & Personal Care — 0.5%
The Procter & Gamble Co.		20,200		3,086,560
Unilever PLC		31,010		1,403,814
				4,490,374
Food — 1.7%
Campbell Soup Co.		8,800		392,216
Conagra Brands, Inc.		12,300		412,911
General Mills, Inc.		36,600		2,478,552
The J.M. Smucker Co.		6,600		893,706
Kellogg Co.		19,400		1,251,106
The Kraft Heinz Co.		74,000		2,914,860
The Kroger Co.		45,000		2,581,650
Mondelez International, Inc. Class A		48,857		3,067,243
Tyson Foods, Inc. Class A		17,800		1,595,414
				15,587,658
Health Care – Products — 2.4%
Abbott Laboratories		11,077		1,311,074
Danaher Corp.		21,907		6,425,980
Henry Schein, Inc. (a)		8,400		732,396
Hologic, Inc. (a)		14,400		1,106,208
Medtronic PLC		19,252		2,136,009
PerkinElmer, Inc.		14,000		2,442,440
Steris PLC		5,100		1,233,027
Thermo Fisher Scientific, Inc.		10,241		6,048,847
				21,435,981
Health Care – Services — 5.2%
Anthem, Inc.		32,525		15,976,931
Centene Corp. (a)		84,244		7,092,502
DaVita, Inc. (a)		8,700		984,057
HCA Healthcare, Inc.		45,760		11,468,371
Laboratory Corp. of America Holdings (a)		14,300		3,770,338
Quest Diagnostics, Inc.		10,500		1,437,030
UnitedHealth Group, Inc.		10,013		5,106,330
Universal Health Services, Inc. Class B		6,000		869,700
				46,705,259
Household Products & Wares — 0.1%
Kimberly-Clark Corp.		9,600		1,182,336
Pharmaceuticals — 13.3%
AbbVie, Inc.		160,037		25,943,598
AmerisourceBergen Corp.		15,900		2,459,889
AstraZeneca PLC		13,437		1,781,896
AstraZeneca PLC Sponsored ADR		126,313		8,379,604
Becton Dickinson and Co.		29,526		7,853,916
Bristol-Myers Squibb Co.		107,400		7,843,422
Cardinal Health, Inc.		8,100		459,270
Cigna Corp.		27,501		6,589,515
CVS Health Corp.		75,485		7,639,837

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Elanco Animal Health, Inc. (a)		38,934	$	1,015,788
Johnson & Johnson		177,516		31,461,161
McKesson Corp.		12,500		3,826,625
Merck & Co., Inc.		152,800		12,537,240
Roche Holding AG		4,764		1,884,044
				119,675,805
				259,346,537
Energy — 5.7%
Energy – Alternate Sources — 0.1%
First Solar, Inc. (a)		6,500		544,310
Oil & Gas — 4.8%
APA Corp.		20,700		855,531
Chevron Corp.		56,728		9,237,020
ConocoPhillips		17,300		1,730,000
Devon Energy Corp.		14,400		851,472
EOG Resources, Inc.		45,300		5,401,119
Exxon Mobil Corp.		255,400		21,093,486
Marathon Oil Corp.		44,515		1,117,772
Ovintiv, Inc.		15,000		811,050
Valero Energy Corp.		24,700		2,508,038
				43,605,488
Oil & Gas Services — 0.2%
Baker Hughes Co.		57,400		2,089,934
Pipelines — 0.6%
Kinder Morgan, Inc.		136,800		2,586,888
ONEOK, Inc.		25,400		1,794,002
TC Energy Corp.		17,900		1,009,918
				5,390,808
				51,630,540
Financial — 23.0%
Banks — 11.6%
Bank of America Corp.		723,842		29,836,767
The Bank of New York Mellon Corp.		53,700		2,665,131
Citizens Financial Group, Inc.		25,700		1,164,981
Comerica, Inc.		8,400		759,612
Commerce Bancshares, Inc.		7,430		531,914
Cullen/Frost Bankers, Inc.		3,200		442,912
East West Bancorp, Inc.		8,600		679,572
Fifth Third Bancorp		43,000		1,850,720
First Horizon Corp.		24,713		580,508
The Goldman Sachs Group, Inc.		20,500		6,767,050
JP Morgan Chase & Co.		216,000		29,445,120
KeyCorp.		59,000		1,320,420
M&T Bank Corp.		7,500		1,271,250
Morgan Stanley		69,500		6,074,300
Northern Trust Corp.		12,600		1,467,270
Pinnacle Financial Partners, Inc.		2,000		184,160
The PNC Financial Services Group, Inc.		25,500		4,703,475
Regions Financial Corp.		58,000		1,291,080

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
State Street Corp.		38,159	$	3,324,412
Synovus Financial Corp.		3,700		181,300
Truist Financial Corp.		80,800		4,581,360
US Bancorp		90,173		4,792,695
Wells Fargo & Co.		1,449		70,219
Zions Bancorp NA		9,900		649,044
				104,635,272
Diversified Financial Services — 3.0%
Ally Financial, Inc.		22,600		982,648
American Express Co.		46,900		8,770,300
Ameriprise Financial, Inc.		6,900		2,072,484
Capital One Financial Corp.		27,600		3,623,604
The Charles Schwab Corp.		62,924		5,305,122
CME Group, Inc.		8,944		2,127,420
Credit Acceptance Corp. (a) (b)		1,000		550,370
Discover Financial Services		17,800		1,961,382
Raymond James Financial, Inc.		12,400		1,362,884
SEI Investments Co.		8,700		523,827
				27,280,041
Insurance — 7.2%
Aflac, Inc.		42,400		2,730,136
The Allstate Corp.		18,200		2,520,882
American Financial Group, Inc.		5,200		757,224
American International Group, Inc.		143,291		8,994,376
Arch Capital Group Ltd. (a)		24,200		1,171,764
Assurant, Inc.		3,600		654,588
Chubb Ltd.		62,926		13,459,871
Cincinnati Financial Corp.		9,800		1,332,408
Equitable Holdings, Inc.		27,953		864,027
Everest Re Group Ltd.		2,800		843,864
Fidelity National Financial, Inc.		17,200		840,048
First American Financial Corp.		6,700		434,294
Globe Life, Inc.		5,600		563,360
The Hartford Financial Services Group, Inc.		66,005		4,739,819
Lincoln National Corp.		11,700		764,712
Loews Corp.		16,100		1,043,602
Markel Corp. (a)		890		1,312,964
MetLife, Inc.		54,200		3,809,176
Old Republic International Corp.		12,600		325,962
Principal Financial Group, Inc.		16,600		1,218,606
Prudential Financial, Inc.		23,800		2,812,446
Reinsurance Group of America, Inc.		2,000		218,920
RenaissanceRe Holdings Ltd.		2,700		427,977
The Travelers Cos., Inc.		53,601		9,794,511
Voya Financial, Inc. (b)		8,000		530,800
W.R. Berkley Corp.		16,200		1,078,758
Willis Towers Watson PLC		7,800		1,842,516
				65,087,611
Real Estate — 0.2%
CBRE Group, Inc. Class A (a)		9,700		887,744
Jones Lang LaSalle, Inc. (a)		3,900		933,894
				1,821,638

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Real Estate Investment Trusts (REITS) — 1.0%
Alexandria Real Estate Equities, Inc.		2,138	$	430,273
Equinix, Inc.		2,210		1,638,980
Equity LifeStyle Properties, Inc.		4,868		372,305
Prologis, Inc.		37,430		6,044,196
				8,485,754
				207,310,316
Industrial — 9.6%
Aerospace & Defense — 2.5%
General Dynamics Corp.		22,300		5,378,314
L3 Harris Technologies, Inc.		22,288		5,537,899
Lockheed Martin Corp.		15,800		6,974,120
Northrop Grumman Corp.		9,700		4,338,034
				22,228,367
Building Materials — 0.3%
Martin Marietta Materials, Inc.		1,946		748,996
Masco Corp.		20,300		1,035,300
Owens Corning		8,400		768,600
				2,552,896
Electronics — 0.5%
Arrow Electronics, Inc. (a)		5,800		688,054
Honeywell International, Inc.		9,761		1,899,296
Hubbell, Inc.		2,951		542,305
Jabil, Inc.		11,700		722,241
Sensata Technologies Holding PLC (a)		8,500		432,225
				4,284,121
Engineering & Construction — 0.1%
Jacobs Engineering Group, Inc.		3,727		513,618
Environmental Controls — 0.2%
Republic Services, Inc.		12,464		1,651,480
Hand & Machine Tools — 0.1%
Snap-on, Inc.		4,200		863,016
Machinery – Construction & Mining — 0.1%
Caterpillar, Inc.		4,900		1,091,818
Oshkosh Corp.		3,700		372,405
				1,464,223
Machinery – Diversified — 0.9%
AGCO Corp.		2,200		321,266
Deere & Co.		19,000		7,893,740
				8,215,006
Miscellaneous - Manufacturing — 1.5%
General Electric Co.		95,284		8,718,486
Parker-Hannifin Corp.		7,800		2,213,328
Siemens AG Registered		10,941		1,516,009

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Textron, Inc.		17,700	$	1,316,526
				13,764,349
Packaging & Containers — 0.6%
Amcor PLC		121,500		1,376,595
Berry Global Group, Inc. (a)		6,900		399,924
Crown Holdings, Inc.		10,500		1,313,445
Packaging Corp. of America		8,582		1,339,736
Sealed Air Corp.		12,100		810,216
WestRock Co.		10,345		486,525
				5,726,441
Shipbuilding — 0.1%
Huntington Ingalls Industries, Inc.		2,500		498,600
Transportation — 2.7%
C.H. Robinson Worldwide, Inc.		7,500		807,825
CSX Corp.		148,457		5,559,714
Expeditors International of Washington, Inc.		9,700		1,000,652
Knight-Swift Transportation Holdings, Inc.		10,100		509,646
Norfolk Southern Corp.		10,226		2,916,660
Union Pacific Corp.		3,372		921,264
United Parcel Service, Inc. Class B		58,621		12,571,860
				24,287,621
				86,049,738
Technology — 7.2%
Computers — 1.9%
Accenture PLC Class A		4,457		1,503,034
Cognizant Technology Solutions Corp. Class A		22,422		2,010,581
DXC Technology Co. (a)		6,500		212,095
Genpact Ltd.		14,700		639,597
Hewlett Packard Enterprise Co.		100,100		1,672,671
HP, Inc.		99,900		3,626,370
International Business Machines Corp.		51,200		6,657,024
Leidos Holdings, Inc.		4,000		432,080
				16,753,452
Semiconductors — 1.9%
Advanced Micro Devices, Inc. (a)		18,400		2,011,856
ASML Holding NV		1,750		1,168,877
KLA Corp.		223		81,631
Micron Technology, Inc.		33,768		2,630,190
QUALCOMM, Inc.		65,090		9,947,054
Texas Instruments, Inc.		5,400		990,792
Wolfspeed, Inc. (a)		2,600		296,036
				17,126,436
Software — 3.4%
Fiserv, Inc. (a)		39,475		4,002,765
Microsoft Corp.		19,994		6,164,350
Oracle Corp.		227,500		18,821,075
salesforce.com, Inc. (a)		5,600		1,188,992

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Synopsys, Inc. (a)		2,700	$	899,829
				31,077,011
				64,956,899
Utilities — 7.2%
Electric — 6.9%
Alliant Energy Corp.		15,200		949,696
American Electric Power Co., Inc.		33,023		3,294,705
CMS Energy Corp.		8,628		603,442
Dominion Energy, Inc.		94,792		8,054,476
DTE Energy Co.		8,955		1,183,941
Duke Energy Corp.		22,500		2,512,350
Edison International		21,700		1,521,170
Entergy Corp.		12,200		1,424,350
Evergy, Inc.		13,900		949,926
Eversource Energy		19,600		1,728,524
Exelon Corp.		75,600		3,600,828
FirstEnergy Corp.		32,900		1,508,794
NextEra Energy, Inc.		43,862		3,715,550
NRG Energy, Inc.		14,000		537,040
OGE Energy Corp.		5,900		240,602
PG&E Corp. (a)		135,240		1,614,766
Pinnacle West Capital Corp.		3,300		257,730
PPL Corp.		43,000		1,228,080
Public Service Enterprise Group, Inc.		40,900		2,863,000
Sempra Energy		46,596		7,833,719
The Southern Co.		169,627		12,299,654
Vistra Corp.		27,600		641,700
Xcel Energy, Inc.		57,395		4,142,197
				62,706,240
Gas — 0.2%
NiSource, Inc.		60,500		1,923,900
Water — 0.1%
Essential Utilities, Inc.		13,100		669,803
				65,299,943
TOTAL COMMON STOCK (Cost $680,825,175)				883,988,434
PREFERRED STOCK — 0.1%
Utilities — 0.1%
Electric — 0.1%
The AES Corp. Convertible 6.875% (b)		3,525		348,729
TOTAL PREFERRED STOCK (Cost $352,500)				348,729
TOTAL EQUITIES (Cost $681,177,675)				884,337,163

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
MUTUAL FUNDS — 1.4%
Diversified Financial Services — 1.4%
iShares Russell 1000 Value ETF		70,139	$	11,641,671
State Street Navigator Securities Lending Government Money Market Portfolio (c)		1,223,304		1,223,304
				12,864,975
TOTAL MUTUAL FUNDS (Cost $12,782,466)				12,864,975
TOTAL LONG-TERM INVESTMENTS (Cost $693,960,141)				897,202,138
SHORT-TERM INVESTMENTS — 1.1%
Mutual Fund — 0.5%
T. Rowe Price Government Reserve Investment Fund		4,757,086		4,757,086
		Principal Amount
Repurchase Agreement — 0.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/22, 0.000%, due 4/01/22 (d)	$	5,364,477		5,364,477
TOTAL SHORT-TERM INVESTMENTS (Cost $10,121,563)				10,121,563
TOTAL INVESTMENTS — 100.8% (Cost $704,081,704) (e)				907,323,701
Other Assets/(Liabilities) — (0.8)%				(7,261,812)
NET ASSETS — 100.0%			$	900,061,889

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, 2022, was $2,028,065 or 0.23% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $858,146 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 $5,364,477. Collateralized by U.S. Government Agency obligations with a rate of 0.500%, maturity date of 4/15/24, and an aggregate market value, including accrued interest, of $5,471,879.

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

MML Equity Momentum Fund —  Portfolio of Investments

March 31, 2022 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.9%
COMMON STOCK — 99.9%
Basic Materials — 0.5%
Iron & Steel — 0.5%
Nucor Corp.		1,428	$	212,272
Communications — 14.9%
Advertising — 0.1%
The Interpublic Group of Cos., Inc.		1,417		50,233
Internet — 14.2%
Alphabet, Inc. Class A (a)		1,214		3,376,559
Alphabet, Inc. Class C (a)		1,139		3,181,215
				6,557,774
Media — 0.1%
FactSet Research Systems, Inc.		145		62,952
Telecommunications — 0.5%
Juniper Networks, Inc.		1,241		46,115
Motorola Solutions, Inc.		659		159,610
				205,725
				6,876,684
Consumer, Cyclical — 5.1%
Auto Manufacturers — 0.7%
Ford Motor Co.		17,399		294,217
Distribution & Wholesale — 0.1%
LKQ Corp.		1,259		57,171
Retail — 4.3%
Advance Auto Parts, Inc.		300		62,088
AutoZone, Inc. (a)		143		292,375
Bath & Body Works, Inc.		923		44,119
Costco Wholesale Corp.		1,989		1,145,366
Genuine Parts Co.		596		75,108
O'Reilly Automotive, Inc. (a)		367		251,380
Tractor Supply Co.		493		115,052
				1,985,488
				2,336,876

MML Equity Momentum Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Consumer, Non-cyclical — 24.4%
Agriculture — 1.9%
Archer-Daniels-Midland Co.		2,964	$	267,531
Philip Morris International, Inc.		6,462		607,040
				874,571
Beverages — 4.6%
The Coca-Cola Co.		17,515		1,085,930
PepsiCo, Inc.		6,135		1,026,876
				2,112,806
Commercial Services — 0.5%
Gartner, Inc. (a)		482		143,376
Robert Half International, Inc.		677		77,300
				220,676
Cosmetics & Personal Care — 3.2%
The Procter & Gamble Co.		9,588		1,465,046
Food — 0.6%
The Hershey Co.		774		167,672
Tyson Foods, Inc. Class A		1,292		115,802
				283,474
Health Care – Services — 6.7%
Anthem, Inc.		1,036		508,904
HCA Healthcare, Inc.		858		215,032
IQVIA Holdings, Inc. (a)		660		152,598
UnitedHealth Group, Inc.		4,370		2,228,569
				3,105,103
Pharmaceuticals — 6.9%
AbbVie, Inc.		7,428		1,204,153
CVS Health Corp.		6,576		665,557
McKesson Corp.		678		207,556
Pfizer, Inc.		21,543		1,115,281
				3,192,547
				11,254,223
Energy — 14.6%
Oil & Gas — 13.4%
APA Corp.		1,757		72,617
Chevron Corp.		10,230		1,665,751
ConocoPhillips		9,795		979,500
Devon Energy Corp.		4,801		283,883
Diamondback Energy, Inc.		849		116,381
EOG Resources, Inc.		3,673		437,932
Exxon Mobil Corp.		23,955		1,978,443
Marathon Oil Corp.		5,080		127,559
Marathon Petroleum Corp.		2,772		237,006

MML Equity Momentum Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Pioneer Natural Resources Co.		1,133	$	283,284
				6,182,356
Oil & Gas Services — 0.5%
Schlumberger NV		5,492		226,874
Pipelines — 0.7%
ONEOK, Inc.		1,925		135,963
The Williams Cos., Inc.		5,519		184,390
				320,353
				6,729,583
Financial — 25.8%
Banks — 7.8%
Bank of America Corp.		33,572		1,383,838
The Bank of New York Mellon Corp.		3,163		156,980
Comerica, Inc.		548		49,556
Fifth Third Bancorp		2,704		116,380
Morgan Stanley		6,146		537,160
The PNC Financial Services Group, Inc.		1,525		281,286
Signature Bank		273		80,123
Wells Fargo & Co.		20,120		975,015
				3,580,338
Diversified Financial Services — 2.9%
American Express Co.		2,439		456,093
Ameriprise Financial, Inc.		497		149,279
The Charles Schwab Corp.		7,550		636,540
Raymond James Financial, Inc.		923		101,447
				1,343,359
Insurance — 9.6%
Aflac, Inc.		2,594		167,028
American International Group, Inc.		3,381		212,225
Arthur J Gallagher & Co.		847		147,886
Berkshire Hathaway, Inc. Class B (a)		8,752		3,088,668
Brown & Brown, Inc.		1,287		93,011
Marsh & McLennan Cos., Inc.		2,443		416,336
Principal Financial Group, Inc.		965		70,841
Prudential Financial, Inc.		1,503		177,610
W.R. Berkley Corp.		794		52,839
				4,426,444
Real Estate — 0.3%
CBRE Group, Inc. Class A (a)		1,632		149,361
Real Estate Investment Trusts (REITS) — 5.2%
AvalonBay Communities, Inc.		826		205,154
Duke Realty Corp.		2,118		122,971
Equity Residential		1,736		156,101
Essex Property Trust, Inc.		259		89,479
Extra Space Storage, Inc.		1,005		206,628
Federal Realty Investment Trust		282		34,424
Mid-America Apartment Communities, Inc.		711		148,919

MML Equity Momentum Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Prologis, Inc.		4,345	$	701,631
Public Storage		1,037		404,720
Regency Centers Corp.		762		54,361
Simon Property Group, Inc.		1,439		189,315
UDR, Inc.		1,575		90,358
				2,404,061
				11,903,563
Industrial — 3.3%
Aerospace & Defense — 0.7%
General Dynamics Corp.		1,315		317,152
Building Materials — 0.5%
Johnson Controls International PLC		3,227		211,594
Environmental Controls — 0.9%
Republic Services, Inc.		1,058		140,185
Waste Management, Inc.		1,782		282,447
				422,632
Machinery – Diversified — 0.2%
Dover Corp.		694		108,889
Miscellaneous - Manufacturing — 0.6%
Eaton Corp. PLC		1,436		217,927
Textron, Inc.		784		58,314
				276,241
Packaging & Containers — 0.1%
Sealed Air Corp.		790		52,898
Transportation — 0.3%
Old Dominion Freight Line, Inc.		434		129,627
				1,519,033
Technology — 10.2%
Computers — 3.1%
Accenture PLC Class A		2,900		977,967
Fortinet, Inc. (a)		763		260,748
HP, Inc.		3,765		136,669
Seagate Technology Holdings PLC		712		64,009
				1,439,393
Semiconductors — 5.7%
NVIDIA Corp.		9,618		2,624,368
Software — 1.4%
Intuit, Inc.		1,018		489,495
Paychex, Inc.		1,217		166,084
				655,579
				4,719,340

MML Equity Momentum Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Utilities — 1.1%
Electric — 1.0%
CenterPoint Energy, Inc.		2,389	$	73,199
Exelon Corp.		5,069		241,437
FirstEnergy Corp.		2,648		121,437
				436,073
Gas — 0.1%
NiSource, Inc.		1,700		54,060
				490,133
TOTAL COMMON STOCK (Cost $44,511,773)				46,041,707
TOTAL EQUITIES (Cost $44,511,773)				46,041,707
TOTAL LONG-TERM INVESTMENTS (Cost $44,511,773)				46,041,707
TOTAL INVESTMENTS — 99.9% (Cost $44,511,773) (b)				46,041,707
Other Assets/(Liabilities) — 0.1%				64,804
NET ASSETS — 100.0%			$	46,106,511

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, 2022 (Unaudited)

	Number of Shares		Value
EQUITIES — 100.0%
COMMON STOCK — 100.0%
Basic Materials — 1.3%
Chemicals — 0.9%
Air Products & Chemicals, Inc.		602	$	150,446
Ecolab, Inc.		699		123,415
The Sherwin-Williams Co.		755		188,463
				462,324
Mining — 0.4%
Newmont Corp.		2,190		173,996
				636,320
Communications — 16.8%
Internet — 12.7%
Alphabet, Inc. Class A (a)		478		1,329,485
Alphabet, Inc. Class C (a)		454		1,268,018
Amazon.com, Inc. (a)		697		2,272,185
eBay, Inc.		2,117		121,219
F5, Inc. (a)		87		18,179
Meta Platforms, Inc. Class A (a)		5,309		1,180,509
VeriSign, Inc. (a)		284		63,179
				6,252,774
Media — 0.2%
FactSet Research Systems, Inc.		216		93,776
The New York Times Co. Class A		384		17,603
Sirius XM Holdings, Inc. (b)		2,141		14,173
				125,552
Telecommunications — 3.9%
Cisco Systems, Inc.		22,576		1,258,838
Motorola Solutions, Inc.		359		86,950
Verizon Communications, Inc.		10,915		556,010
				1,901,798
				8,280,124
Consumer, Cyclical — 9.8%
Apparel — 0.0%
Columbia Sportswear Co.		125		11,316
Auto Parts & Equipment — 0.1%
Gentex Corp.		1,128		32,904

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Distribution & Wholesale — 0.8%
Copart, Inc. (a)		758	$	95,106
Fastenal Co.		2,720		161,568
Pool Corp.		203		85,839
Watsco, Inc.		174		53,007
				395,520
Home Furnishing — 0.0%
Dolby Laboratories, Inc. Class A		172		13,454
Housewares — 0.1%
The Scotts Miracle-Gro Co.		121		14,878
Retail — 8.8%
Advance Auto Parts, Inc.		167		34,562
Costco Wholesale Corp.		1,558		897,174
Dollar General Corp.		1,328		295,653
Dollar Tree, Inc. (a)		671		107,461
Domino's Pizza, Inc.		108		43,957
Genuine Parts Co.		440		55,449
The Home Depot, Inc.		2,886		863,866
Lowe's Cos., Inc.		1,842		372,434
O'Reilly Automotive, Inc. (a)		305		208,913
Target Corp.		1,462		310,266
Tractor Supply Co.		474		110,617
Walmart, Inc.		7,019		1,045,269
				4,345,621
				4,813,693
Consumer, Non-cyclical — 29.7%
Agriculture — 1.7%
Altria Group, Inc.		6,804		355,509
Philip Morris International, Inc.		5,066		475,900
				831,409
Beverages — 0.3%
Brown-Forman Corp. Class B		478		32,035
Monster Beverage Corp. (a)		1,814		144,939
				176,974
Biotechnology — 1.7%
Amgen, Inc.		1,642		397,068
Bio-Rad Laboratories, Inc. Class A (a)		68		38,300
Regeneron Pharmaceuticals, Inc. (a)		263		183,685
United Therapeutics Corp. (a)		103		18,479
Vertex Pharmaceuticals, Inc. (a)		747		194,945
				832,477
Commercial Services — 3.0%
Automatic Data Processing, Inc.		2,098		477,379
FTI Consulting, Inc. (a)		128		20,124
Grand Canyon Education, Inc. (a)		133		12,916
MarketAxess Holdings, Inc.		146		49,669

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Moody's Corp.		785	$	264,867
Morningstar, Inc.		103		28,136
Rollins, Inc.		1,197		41,955
S&P Global, Inc.		1,269		520,518
Verisk Analytics, Inc.		344		73,833
				1,489,397
Cosmetics & Personal Care — 4.6%
Colgate-Palmolive Co.		3,971		301,121
The Procter & Gamble Co.		12,763		1,950,187
				2,251,308
Food — 0.6%
Flowers Foods, Inc.		588		15,118
General Mills, Inc.		1,394		94,402
The Hershey Co.		453		98,133
Hormel Foods Corp.		1,221		62,930
The J.M. Smucker Co.		261		35,342
				305,925
Health Care – Products — 5.2%
Abbott Laboratories		5,401		639,262
Bio-Techne Corp.		90		38,973
Edwards Lifesciences Corp. (a)		1,879		221,196
Globus Medical, Inc. Class A (a)		215		15,863
Henry Schein, Inc. (a)		435		37,928
IDEXX Laboratories, Inc. (a)		301		164,665
Intuitive Surgical, Inc. (a)		1,077		324,909
Masimo Corp. (a)		198		28,817
ResMed, Inc.		510		123,680
Thermo Fisher Scientific, Inc.		1,301		768,436
Waters Corp. (a)		151		46,869
West Pharmaceutical Services, Inc.		348		142,927
				2,553,525
Health Care – Services — 3.6%
Anthem, Inc.		688		337,960
Chemed Corp.		86		43,563
Humana, Inc.		402		174,938
Quest Diagnostics, Inc.		386		52,828
UnitedHealth Group, Inc.		2,260		1,152,532
				1,761,821
Household Products & Wares — 0.6%
Church & Dwight Co., Inc.		839		83,380
The Clorox Co.		532		73,964
Kimberly-Clark Corp.		977		120,327
				277,671
Pharmaceuticals — 8.4%
Bristol-Myers Squibb Co.		4,716		344,409
Eli Lilly & Co.		2,198		629,441
Johnson & Johnson		10,551		1,869,954
Merck & Co., Inc.		5,471		448,896

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Pfizer, Inc.		11,800	$	610,886
Premier, Inc. Class A		494		17,581
Zoetis, Inc.		1,252		236,115
				4,157,282
				14,637,789
Financial — 14.2%
Diversified Financial Services — 5.8%
Cboe Global Markets, Inc.		423		48,400
Lazard Ltd. Class A		255		8,797
Mastercard, Inc. Class A		3,136		1,120,744
Nasdaq, Inc.		409		72,884
SEI Investments Co.		551		33,176
T. Rowe Price Group, Inc.		1,117		168,879
Visa, Inc. Class A		6,342		1,406,465
				2,859,345
Insurance — 6.9%
The Allstate Corp.		749		103,744
Aon PLC Class A		855		278,414
Arthur J Gallagher & Co.		472		82,411
Berkshire Hathaway, Inc. Class B (a)		5,997		2,116,401
Brown & Brown, Inc.		856		61,863
Erie Indemnity Co. Class A		127		22,369
Marsh & McLennan Cos., Inc.		2,114		360,268
The Progressive Corp.		3,378		385,058
White Mountains Insurance Group Ltd.		18		20,452
				3,430,980
Real Estate Investment Trusts (REITS) — 1.5%
AvalonBay Communities, Inc.		321		79,727
Equity LifeStyle Properties, Inc.		489		37,399
Equity Residential		866		77,871
Essex Property Trust, Inc.		139		48,022
Extra Space Storage, Inc.		404		83,062
First Industrial Realty Trust, Inc.		369		22,845
Highwoods Properties, Inc.		263		12,029
Public Storage		937		365,692
				726,647
				7,016,972
Industrial — 5.4%
Aerospace & Defense — 1.3%
L3 Harris Technologies, Inc.		472		117,278
Lockheed Martin Corp.		1,207		532,770
				650,048
Building Materials — 0.1%
Lennox International, Inc.		116		29,912
Masco Corp.		739		37,689
				67,601

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Electrical Components & Equipment — 0.1%
AMETEK, Inc.		541	$	72,050
Electronics — 0.8%
Agilent Technologies, Inc.		702		92,896
Garmin Ltd.		760		90,144
Keysight Technologies, Inc. (a)		414		65,399
Mettler-Toledo International, Inc. (a)		97		133,199
				381,638
Environmental Controls — 0.2%
Pentair PLC		377		20,437
Republic Services, Inc.		547		72,478
				92,915
Hand & Machine Tools — 0.1%
Snap-on, Inc.		160		32,877
Machinery – Diversified — 0.5%
Cognex Corp.		377		29,086
Graco, Inc.		773		53,894
IDEX Corp.		192		36,812
Otis Worldwide Corp.		1,131		87,030
The Toro Co.		358		30,605
				237,427
Miscellaneous - Manufacturing — 0.8%
3M Co.		1,545		230,019
A.O. Smith Corp.		547		34,948
Illinois Tool Works, Inc.		679		142,183
				407,150
Packaging & Containers — 0.1%
Ardagh Group SA (a) (b) (c) (d)		463		9,829
Sonoco Products Co.		223		13,951
				23,780
Shipbuilding — 0.0%
Huntington Ingalls Industries, Inc.		95		18,947
Transportation — 1.4%
Expeditors International of Washington, Inc.		810		83,560
J.B. Hunt Transport Services, Inc.		322		64,654
Knight-Swift Transportation Holdings, Inc.		428		21,597
Landstar System, Inc.		107		16,139
Old Dominion Freight Line, Inc.		337		100,655
United Parcel Service, Inc. Class B		1,925		412,835
				699,440
				2,683,873
Technology — 22.8%
Computers — 8.6%
Accenture PLC Class A		2,552		860,611

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Amdocs Ltd.		382	$	31,404
Apple, Inc.		17,989		3,141,059
Cognizant Technology Solutions Corp. Class A		1,252		112,267
EPAM Systems, Inc. (a)		120		35,593
Fortinet, Inc. (a)		193		65,956
				4,246,890
Semiconductors — 2.1%
Intel Corp.		8,303		411,497
Monolithic Power Systems, Inc.		84		40,797
Texas Instruments, Inc.		3,237		593,925
				1,046,219
Software — 12.1%
Activision Blizzard, Inc.		2,311		185,134
Adobe, Inc. (a)		1,551		706,666
Aspen Technology, Inc. (a)		117		19,348
Broadridge Financial Solutions, Inc.		662		103,080
Cadence Design Systems, Inc. (a)		671		110,353
Cerner Corp.		1,422		133,042
Citrix Systems, Inc.		338		34,104
Electronic Arts, Inc.		1,008		127,522
Intuit, Inc.		724		348,128
Jack Henry & Associates, Inc.		412		81,185
Microsoft Corp.		9,014		2,779,106
MSCI, Inc.		373		187,574
Oracle Corp.		3,547		293,443
Paychex, Inc.		1,844		251,651
salesforce.com, Inc. (a)		1,387		294,488
Synopsys, Inc. (a)		380		126,643
Take-Two Interactive Software, Inc. (a) (b)		256		39,358
Tyler Technologies, Inc. (a)		107		47,603
Veeva Systems, Inc. Class A (a)		295		62,676
VMware, Inc. Class A		117		13,324
				5,944,428
				11,237,537
TOTAL COMMON STOCK (Cost $49,425,275)				49,306,308
TOTAL EQUITIES (Cost $49,425,275)				49,306,308
MUTUAL FUNDS — 0.1%
Diversified Financial Services — 0.1%
State Street Navigator Securities Lending Government Money Market Portfolio (e)		26,398		26,398
TOTAL MUTUAL FUNDS (Cost $26,398)				26,398
TOTAL LONG-TERM INVESTMENTS (Cost $49,451,673)				49,332,706

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares	Value
TOTAL INVESTMENTS — 100.1% (Cost $49,451,673) (f)		$	49,332,706
Other Assets/(Liabilities) — (0.1)%			(32,801)
NET ASSETS — 100.0%		$	49,299,905

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, 2022, was $64,846 or 0.13% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $40,282 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)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At March 31, 2022, these securities amounted to a value of $9,829 or 0.02% of net assets.
(d)	Investment was valued using significant unobservable inputs.

(e) Represents investment of security lending cash collateral. (Note 2).

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

MML High Yield Fund —  Portfolio of Investments

March 31, 2022 (Unaudited)

	Number of Shares		Value
EQUITIES — 0.7%
COMMON STOCK — 0.7%
Energy — 0.7%
Oil & Gas — 0.7%
Fieldwood Energy LLC (a) (b)		3,193	$	—
Fieldwood Energy LLC (a) (b)		13,011		—
Tourmaline Oil Corp.		11,112		511,979
				511,979
				511,979
TOTAL COMMON STOCK (Cost $550,886)				511,979
TOTAL EQUITIES (Cost $550,886)				511,979
	Principal Amount
BONDS & NOTES — 91.0%
BANK LOANS — 2.9%
Food — 0.2%
Florida Food Products, LLC, 2021 EUR Term Loan B, 1 mo. USD LIBOR + 5.000%
5.750% VRN 10/18/28	$	167,281		164,771
Media — 0.5%
MSG National Properties, LLC, EUR Term Loan B, 3 mo. USD LIBOR + 6.250%
7.000% VRN 11/12/25		351,379		349,622
Packaging & Containers — 0.1%
Clydesdale Acquisition Holdings, Inc., Term Loan B
0.000% VRN 3/30/29 (c)		95,966		94,366
Software — 2.1%
Finastra USA, Inc., 2021 EUR Term Loan B, 3 mo. USD LIBOR + 7.250%
8.250% VRN 6/13/25		1,169,026		1,148,019
Quest Software US Holdings, Inc., 2021 2nd Lien Term Loan, 3 mo. SOFR + 7.500%
8.150% VRN 2/01/30		342,316		331,406
				1,479,425
TOTAL BANK LOANS (Cost $2,097,935)				2,088,184

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
CORPORATE DEBT — 88.1%
Advertising — 1.3%
Stagwell Global LLC
5.625% 8/15/29 (d)	$	220,000	$	208,501
Terrier Media Buyer, Inc.
8.875% 12/15/27 (d)		712,000		730,056
				938,557
Aerospace & Defense — 1.8%
Triumph Group, Inc.
6.250% 9/15/24 (d)		306,000		304,393
7.750% 8/15/25 (e)		984,000		991,262
				1,295,655
Airlines — 2.4%
American Airlines, Inc.
11.750% 7/15/25 (d)		379,000		442,392
American Airlines, Inc. /AAdvantage Loyalty IP Ltd.
5.500% 4/20/26 (d)		535,000		539,066
5.750% 4/20/29 (d)		229,000		228,141
Mileage Plus Holdings LLC / Mileage Plus Intellectual Property Assets Ltd.
6.500% 6/20/27 (d)		265,000		276,262
United Airlines, Inc.
4.375% 4/15/26 (d)		122,000		120,094
4.625% 4/15/29 (d)		121,000		115,065
				1,721,020
Auto Manufacturers — 0.9%
Ford Motor Co.
7.450% 7/16/31		153,000		180,852
JB Poindexter & Co., Inc.
7.125% 4/15/26 (d)		435,000		442,513
				623,365
Auto Parts & Equipment — 1.0%
Adient Global Holdings Ltd.
4.875% 8/15/26 (d)		277,000		264,189
Clarios Global LP/Clarios US Finance Co.
8.500% 5/15/27 (d)		467,000		484,512
				748,701
Beverages — 0.0%
Triton Water Holdings, Inc.
6.250% 4/01/29 (d)		21,000		17,955
Biotechnology — 0.4%
Emergent BioSolutions, Inc.
3.875% 8/15/28 (d)		347,000		311,290
Building Materials — 1.2%
Jeld-Wen, Inc.
4.875% 12/15/27 (d)		68,000		65,110
New Enterprise Stone & Lime Co., Inc.
5.250% 7/15/28 (d)		222,000		213,426

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
9.750% 7/15/28 (d)	$	602,000	$	607,268
				885,804
Chemicals — 2.7%
ASP Unifrax Holdings, Inc.
7.500% 9/30/29 (d)		96,000		85,369
Consolidated Energy Finance SA
5.625% 10/15/28 (d)		595,000		550,375
6.500% 5/15/26 (d)		174,000		177,597
LSF11 A5 HoldCo LLC
6.625% 10/15/29 (d)		217,000		201,886
Olympus Water US Holding Corp.
4.250% 10/01/28 (d)		326,000		296,279
6.250% 10/01/29 (d) (e)		459,000		406,215
PMHC II, Inc.
9.000% 2/15/30 (d)		295,000		259,576
				1,977,297
Coal — 1.5%
Coronado Finance Pty Ltd.
10.750% 5/15/26 (d)		247,000		264,599
PIC AU Holdings LLC / PIC AU Holdings Corp.
10.000% 12/31/24 (d)		656,000		673,220
Warrior Met Coal, Inc.
7.875% 12/01/28 (d)		135,000		141,919
				1,079,738
Commercial Services — 2.2%
Alta Equipment Group, Inc.
5.625% 4/15/26 (d)		298,000		283,234
APi Escrow Corp.
4.750% 10/15/29 (d)		179,000		166,246
The Hertz Corp.
5.000% 12/01/29 (d)		315,000		285,693
PECF USS Intermediate Holding III Corp.
8.000% 11/15/29 (d)		52,000		50,180
Prime Security Services Borrower LLC / Prime Finance, Inc.
6.250% 1/15/28 (d)		418,000		409,389
PROG Holdings, Inc.
6.000% 11/15/29 (d) (e)		304,000		281,960
WASH Multifamily Acquisition, Inc.
5.750% 4/15/26 (d)		124,000		124,310
				1,601,012
Computers — 1.6%
CA Magnum Holdings
5.375% 10/31/26 (d)		272,000		267,920
Condor Merger Sub, Inc.
7.375% 2/15/30 (d)		437,000		418,427
Presidio Holdings, Inc.
8.250% 2/01/28 (d)		462,000		471,240
				1,157,587

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Cosmetics & Personal Care — 0.6%
Coty, Inc. /HFC Prestige Products, Inc. /HFC Prestige International US LLC
4.750% 1/15/29 (d)	$	446,000	$	415,895
Distribution & Wholesale — 0.4%
Resideo Funding, Inc.
4.000% 9/01/29 (d)		308,000		280,295
Diversified Financial Services — 5.1%
Coinbase Global, Inc.
3.375% 10/01/28 (d) (e)		168,000		149,688
3.625% 10/01/31 (d)		136,000		115,940
Global Aircraft Leasing Co. Ltd.
6.500% 9/15/24 (d)		1,445,880		1,314,984
Jefferson Capital Holdings LLC
6.000% 8/15/26 (d)		380,000		361,950
Midcap Financial Issuer Trust
5.625% 1/15/30 (d)		339,000		299,564
6.500% 5/01/28 (d)		270,000		253,940
NFP Corp.
6.875% 8/15/28 (d)		200,000		190,500
OneMain Finance Corp.
4.000% 9/15/30 (e)		169,000		149,143
5.375% 11/15/29		552,000		536,307
PRA Group, Inc.
5.000% 10/01/29 (d)		385,000		364,872
				3,736,888
Electric — 1.5%
PG&E Corp.
5.000% 7/01/28		567,000		548,062
Pike Corp.
5.500% 9/01/28 (d)		593,000		558,903
				1,106,965
Electrical Components & Equipment — 0.3%
Energizer Holdings, Inc.
6.500% 12/31/27 (d)		215,000		212,850
Electronics — 0.4%
Atkore, Inc.
4.250% 6/01/31 (d)		347,000		322,710
Engineering & Construction — 0.4%
Arcosa, Inc. Co.
4.375% 4/15/29 (d)		184,000		174,570
Railworks Holdings LP / Railworks Rally, Inc.
8.250% 11/15/28 (d)		117,000		120,137
				294,707
Entertainment — 1.1%
CCM Merger, Inc.
6.375% 5/01/26 (d)		193,000		194,930
Live Nation Entertainment, Inc.
4.750% 10/15/27 (d)		260,000		254,184

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Scientific Games Holdings LP/Scientific Games US FinCo, Inc.
6.625% 3/01/30 (d)	$	365,000	$	359,810
				808,924
Food — 3.2%
JBS Finance Luxembourg SARL
3.625% 1/15/32 (d)		420,000		384,300
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc.
5.500% 1/15/30 (d)		826,000		844,403
6.500% 4/15/29 (d)		1,027,000		1,086,731
				2,315,434
Forest Products & Paper — 0.7%
Clearwater Paper Corp.
4.750% 8/15/28 (d)		230,000		213,613
Sylvamo Corp.
7.000% 9/01/29 (d)		270,000		264,978
				478,591
Health Care – Products — 0.3%
Mozart Debt Merger Sub, Inc.
5.250% 10/01/29 (d)		229,000		214,033
Health Care – Services — 3.7%
Centene Corp.
4.625% 12/15/29		448,000		453,376
Charles River Laboratories International, Inc.
3.750% 3/15/29 (d)		40,000		37,750
4.250% 5/01/28 (d)		146,000		142,168
CHS/Community Health Systems, Inc.
4.750% 2/15/31 (d)		108,000		102,060
5.250% 5/15/30 (d)		468,000		449,767
6.125% 4/01/30 (d) (e)		213,000		198,190
ModivCare Escrow Issuer, Inc.
5.000% 10/01/29 (d)		143,000		133,306
Radiology Partners, Inc.
9.250% 2/01/28 (d)		655,000		655,000
Tenet Healthcare Corp.
4.375% 1/15/30 (d)		165,000		158,388
6.125% 10/01/28 (d)		350,000		355,687
				2,685,692
Home Builders — 1.7%
Ashton Woods USA LLC / Ashton Woods Finance Co.
4.625% 8/01/29 (d)		198,000		174,602
Empire Communities Corp.
7.000% 12/15/25 (d)		123,000		121,524
M/I Homes, Inc.
4.950% 2/01/28		368,000		346,840
Mattamy Group Corp.
4.625% 3/01/30 (d)		668,000		627,459
				1,270,425

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Insurance — 0.4%
Highlands Holdings Bond Issuer Ltd. / Highlands Holdings Bond Co-Issuer, Inc.
7.625% 10/15/25 (d)	$	305,269	$	306,530
Internet — 2.4%
Acuris Finance Us, Inc. / Acuris Finance SARL
5.000% 5/01/28 (d)		359,000		329,831
Getty Images, Inc.
9.750% 3/01/27 (d)		74,000		76,590
ION Trading Technologies SARL
5.750% 5/15/28 (d)		298,000		287,198
Millennium Escrow Corp.
6.625% 8/01/26 (d)		296,000		281,034
Northwest Fiber LLC / Northwest Fiber Finance Sub, Inc.
4.750% 4/30/27 (d)		114,000		108,243
6.000% 2/15/28 (d) (e)		171,000		150,104
10.750% 6/01/28 (d)		227,000		236,650
Twitter, Inc.
5.000% 3/01/30 (d)		272,000		270,640
				1,740,290
Leisure Time — 2.3%
Carnival Corp.
5.750% 3/01/27 (d)		487,000		463,950
6.000% 5/01/29 (d)		305,000		287,414
NCL Corp. Ltd.
5.875% 3/15/26 (d)		499,000		474,050
5.875% 2/15/27 (d)		49,000		48,265
NCL Finance Ltd.
6.125% 3/15/28 (d)		94,000		87,170
Royal Caribbean Cruises Ltd.
5.500% 8/31/26 (d)		343,000		330,556
				1,691,405
Lodging — 0.9%
Hilton Grand Vacations Borrower Escrow LLC / Hilton Grand Vacations Borrower Esc
4.875% 7/01/31 (d)		199,000		184,573
Sugarhouse HSP Gaming Prop Mezz LP / Sugarhouse HSP Gaming Finance Corp.
5.875% 5/15/25 (d)		225,000		221,625
Travel & Leisure Co.
6.625% 7/31/26 (d)		213,000		222,052
				628,250
Machinery – Diversified — 0.3%
OT Merger Corp.
7.875% 10/15/29 (d)		219,000		189,435
Media — 8.5%
Altice Financing SA
5.000% 1/15/28 (d)		152,000		136,245
CCO Holdings LLC/CCO Holdings Capital Corp.
4.250% 1/15/34 (d)		486,000		422,089

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
CSC Holdings LLC
4.625% 12/01/30 (d)	$	311,000	$	260,086
Cumulus Media New Holdings, Inc.
6.750% 7/01/26 (d) (e)		230,000		230,055
DIRECTV Financing LLC / DIRECTV Financing Co-Obligor, Inc.
5.875% 8/15/27 (d)		543,000		534,475
DISH DBS Corp.
5.250% 12/01/26 (d)		53,000		50,453
5.750% 12/01/28 (d)		68,000		64,345
7.375% 7/01/28		32,000		30,320
DISH Network Corp.
3.375% 8/15/26		680,000		611,660
Gray Escrow II, Inc.
5.375% 11/15/31 (d)		246,000		235,229
iHeartCommunications, Inc.
8.375% 5/01/27		831,000		860,085
LCPR Senior Secured Financing DAC
5.125% 7/15/29 (d)		465,000		443,933
6.750% 10/15/27 (d)		283,000		290,726
Nexstar Media, Inc.
4.750% 11/01/28 (d)		118,000		114,905
Radiate Holdco LLC / Radiate Finance, Inc.
6.500% 9/15/28 (d)		336,000		318,772
Sinclair Television Group Inc, SERIES 144A, 144A,
5.125% 2/15/27 (d)		178,000		161,535
Sirius XM Radio, Inc.
3.125% 9/01/26 (d)		225,000		212,731
3.875% 9/01/31 (d)		333,000		305,471
Townsquare Media, Inc.
6.875% 2/01/26 (d)		429,000		441,806
Virgin Media Secured Finance PLC
4.500% 8/15/30 (d)		280,000		261,100
Virgin Media Vendor Financing Notes IV DAC
5.000% 7/15/28 (d)		200,000		192,000
				6,178,021
Metal Fabricate & Hardware — 0.2%
Park-Ohio Industries, Inc.
6.625% 4/15/27 (e)		146,000		122,275
Mining — 2.0%
Compass Minerals International, Inc.
4.875% 7/15/24 (d)		294,000		290,693
6.750% 12/01/27 (d)		192,000		194,419
First Quantum Minerals Ltd.
7.250% 4/01/23 (d)		407,000		407,008
Hecla Mining Co.
7.250% 2/15/28 (e)		423,000		443,621
Novelis Corp.
3.250% 11/15/26 (d)		48,000		45,854
3.875% 8/15/31 (d)		50,000		45,733
				1,427,328
Office & Business Equipment — 0.3%
Pitney Bowes, Inc.
6.875% 3/15/27 (d) (e)		250,000		235,000

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Oil & Gas — 9.3%
Apache Corp.
4.750% 4/15/43	$	65,000	$	61,792
5.100% 9/01/40		130,000		130,975
5.350% 7/01/49		197,000		189,382
Chesapeake Energy Corp.
5.500% 2/01/26 (d)		90,000		92,212
5.875% 2/01/29 (d)		205,000		211,662
Comstock Resources, Inc.
5.875% 1/15/30 (d)		114,000		112,324
6.750% 3/01/29 (d)		126,000		129,979
CVR Energy, Inc.
5.750% 2/15/28 (d) (e)		949,000		900,041
Hilcorp Energy I LP / Hilcorp Finance Co.
6.250% 11/01/28 (d)		365,000		369,690
MEG Energy Corp.
7.125% 2/01/27 (d)		379,000		396,813
Murphy Oil Corp.
6.375% 7/15/28		182,000		189,508
Nabors Industries Ltd.
7.250% 1/15/26 (d)		339,000		339,000
7.500% 1/15/28 (d)		169,000		164,775
Nabors Industries, Inc.
5.750% 2/01/25		55,000		53,659
7.375% 5/15/27 (d)		227,000		236,164
Neptune Energy Bondco PLC
6.625% 5/15/25 (d)		594,000		594,772
Occidental Petroleum Corp.
6.125% 1/01/31 (e)		387,000		435,859
6.200% 3/15/40		550,000		610,500
6.450% 9/15/36		215,000		253,353
6.950% 7/01/24		88,000		94,398
Parkland Corp.
4.625% 5/01/30 (d)		105,000		97,650
5.875% 7/15/27 (d)		269,000		268,327
Range Resources Corp. Co.
8.250% 1/15/29		123,000		134,797
Rockcliff Energy II LLC
5.500% 10/15/29 (d)		124,000		124,260
Southwestern Energy Co.
4.750% 2/01/32		109,000		108,864
Transocean Guardian Ltd.
5.875% 1/15/24 (d)		28,501		27,290
Transocean Poseidon Ltd.
6.875% 2/01/27 (d)		27,188		26,916
Transocean, Inc.
7.250% 11/01/25 (d)		172,000		149,640
7.500% 1/15/26 (d)		241,000		209,288
8.000% 2/01/27 (d)		66,000		55,770
				6,769,660
Oil & Gas Services — 0.6%
Weatherford International Ltd.
6.500% 9/15/28 (d)		126,000		129,776
8.625% 4/30/30 (d)		302,000		306,636
				436,412

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Packaging & Containers — 1.2%
Clydesdale Acquisition Holdings, Inc.
6.625% 4/15/29 (f)	$	79,000	$	79,889
8.750% 4/15/30 (d) (f)		263,000		247,549
Mauser Packaging Solutions Holding Co.
5.500% 4/15/24 (d)		164,000		163,348
Trident TPI Holdings, Inc.
9.250% 8/01/24 (d)		386,000		387,930
				878,716
Pharmaceuticals — 3.4%
AdaptHealth LLC
5.125% 3/01/30 (d)		451,000		418,866
Bausch Health Americas, Inc.
8.500% 1/31/27 (d) (e)		250,000		249,817
Bausch Health Cos., Inc.
4.875% 6/01/28 (d)		295,000		282,462
5.000% 1/30/28 (d)		446,000		367,312
5.250% 1/30/30 (d)		320,000		251,373
5.250% 2/15/31 (d)		384,000		300,480
Jazz Securities DAC
4.375% 1/15/29 (d)		97,000		94,100
Organon & Co. / Organon Foreign Debt Co-Issuer BV
4.125% 4/30/28 (d)		200,000		190,929
Par Pharmaceutical, Inc.
7.500% 4/01/27 (d)		352,000		328,469
				2,483,808
Pipelines — 7.0%
Antero Midstream Partners LP / Antero Midstream Finance Corp.
5.375% 6/15/29 (d)		853,000		852,130
Buckeye Partners LP
5.850% 11/15/43		66,000		56,261
CQP Holdco LP / BIP-V Chinook Holdco LLC
5.500% 6/15/31 (d)		379,000		372,912
EnLink Midstream LLC
5.375% 6/01/29		173,000		173,000
EnLink Midstream Partners LP
4.850% 7/15/26		56,000		56,140
5.450% 6/01/47		97,000		81,965
5.600% 4/01/44		257,000		221,662
EQM Midstream Partners LP
4.500% 1/15/29 (d)		157,000		147,691
4.750% 1/15/31 (d)		142,000		132,770
6.000% 7/01/25 (d)		182,000		184,462
6.500% 7/01/27 (d)		151,000		157,725
Genesis Energy LP/Genesis Energy Finance Corp.
6.500% 10/01/25		440,000		433,972
Harvest Midstream I LP
7.500% 9/01/28 (d)		228,000		233,518
ITT Holdings LLC
6.500% 8/01/29 (d)		565,000		521,902
NGL Energy Operating LLC / NGL Energy Finance Corp.
7.500% 2/01/26 (d)		546,000		537,095
Targa Resources Partners LP/Targa Resources Partners Finance Corp.
4.875% 2/01/31		295,000		297,950

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
5.000% 1/15/28	$	33,000	$	33,445
5.500% 3/01/30		28,000		29,190
6.875% 1/15/29		61,000		65,383
Venture Global Calcasieu Pass LLC
3.875% 8/15/29 (d)		133,000		129,120
4.125% 8/15/31 (d)		152,000		149,135
Western Midstream Operating LP
5.450% 4/01/44		202,000		205,030
				5,072,458
Real Estate — 0.4%
Realogy Group LLC / Realogy Co-Issuer Corp.
5.750% 1/15/29 (d)		311,000		293,875
Real Estate Investment Trusts (REITS) — 1.6%
Ladder Capital Finance Holdings LLLP / Ladder Capital Finance Corp.
4.750% 6/15/29 (d)		425,000		402,681
RLJ Lodging Trust LP
3.750% 7/01/26 (d)		107,000		101,650
Service Properties Trust
3.950% 1/15/28		73,000		62,054
4.375% 2/15/30		115,000		95,466
4.950% 2/15/27		58,000		53,827
7.500% 9/15/25		267,000		280,296
Uniti Group LP / Uniti Fiber Holdings, Inc. / CSL Capital LLC
4.750% 4/15/28 (d)		180,000		170,374
7.875% 2/15/25 (d)		25,000		25,975
				1,192,323
Retail — 4.2%
Asbury Automotive Group, Inc.
4.625% 11/15/29 (d)		81,000		75,772
Bath & Body Works, Inc.
6.750% 7/01/36		97,000		99,192
6.875% 11/01/35		299,000		309,316
BCPE Ulysses Intermediate, Inc.
7.750% 4/01/27 (d)		405,000		367,538
Macy's Retail Holdings LLC
5.875% 4/01/29 (d) (e)		40,000		39,700
5.875% 3/15/30 (d)		71,000		70,252
6.125% 3/15/32 (d)		78,000		77,025
NMG Holding Co., Inc. / Neiman Marcus Group LLC
7.125% 4/01/26 (d)		473,000		485,771
Nordstrom, Inc.
4.000% 3/15/27		65,000		62,611
4.375% 4/01/30		65,000		60,731
5.000% 1/15/44 (e)		331,000		296,374
Sonic Automotive, Inc.
4.625% 11/15/29 (d)		108,000		96,525
4.875% 11/15/31 (d)		63,000		55,843
Staples, Inc.
7.500% 4/15/26 (d)		461,000		447,679
10.750% 4/15/27 (d) (e)		422,000		375,143
Superior Plus LP / Superior General Partner, Inc.
4.500% 3/15/29 (d)		145,000		136,246
				3,055,718

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Software — 1.4%
Avaya Holdings Corp., Convertible,
2.250% 6/15/23	$	335,000	$	324,447
Consensus Cloud Solutions, Inc.
6.000% 10/15/26 (d)		94,000		93,295
6.500% 10/15/28 (d)		68,000		67,570
Open Text Corp.
3.875% 2/15/28 (d)		43,000		41,227
3.875% 12/01/29 (d)		82,000		77,900
Open Text Holdings, Inc.
4.125% 12/01/31 (d)		72,000		67,410
Veritas US, Inc./Veritas Bermuda Ltd.
7.500% 9/01/25 (d)		402,000		381,671
				1,053,520
Telecommunications — 3.8%
Altice France SA
5.125% 7/15/29 (d)		368,000		329,820
Avaya, Inc.
6.125% 9/15/28 (d)		219,000		215,971
Connect Finco SARL / Connect US Finco LLC
6.750% 10/01/26 (d)		84,000		85,461
Consolidated Communications, Inc.
6.500% 10/01/28 (d)		391,000		360,267
Frontier Communications Holdings LLC
6.000% 1/15/30 (d) (e)		572,000		529,100
Sprint Capital Corp.
6.875% 11/15/28		476,000		552,174
8.750% 3/15/32		401,000		539,717
Windstream Escrow LLC / Windstream Escrow Finance Corp.
7.750% 8/15/28 (d) (e)		179,000		181,238
				2,793,748
Transportation — 1.5%
Carriage Purchaser, Inc.
7.875% 10/15/29 (d)		186,000		171,684
First Student Bidco, Inc./First Transit Parent, Inc.
4.000% 7/31/29 (d)		425,000		396,321
Seaspan Corp.
5.500% 8/01/29 (d)		571,000		533,885
				1,101,890
TOTAL CORPORATE DEBT (Cost $65,754,671)				64,152,052
TOTAL BONDS & NOTES (Cost $67,852,606)				66,240,236

MML High Yield Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
MUTUAL FUNDS — 6.6%
Diversified Financial Services — 6.6%
State Street Navigator Securities Lending Government Money Market Portfolio (g)		4,829,550	$	4,829,550
TOTAL MUTUAL FUNDS (Cost $4,829,550)				4,829,550
TOTAL LONG-TERM INVESTMENTS (Cost $73,233,042)				71,581,765
	Principal Amount
SHORT-TERM INVESTMENTS — 5.2%
Repurchase Agreement — 5.2%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/22, 0.000%, due 4/01/22 (h)	$	3,819,989		3,819,989
TOTAL SHORT-TERM INVESTMENTS (Cost $3,819,989)				3,819,989
TOTAL INVESTMENTS — 103.5% (Cost $77,053,031) (i)				75,401,754
Other Assets/(Liabilities) — (3.5)%				(2,560,334)
NET ASSETS — 100.0%			$	72,841,420

Abbreviation Legend

VRN Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Investment was valued using significant unobservable inputs.

(b) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At March 31, 2022, these securities amounted to a value of $0 or 0.00% of net assets.

(c) All or a portion of the security represents unsettled loan commitments at March 31, 2022 where the rate will be determined at time of settlement.

(d) Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At March 31, 2022, the aggregate market value of these securities amounted to $52,145,070 or 71.59% of net assets.

(e) Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2022, was $5,310,468 or 7.29% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $592,329 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).

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

(g) Represents investment of security lending cash collateral. (Note 2).

(h) Maturity value of $3,819,989. Collateralized by U.S. Government Agency obligations with a rate of 0.500%, maturity date of 4/15/24, and an aggregate market value, including accrued interest, of $3,896,404.

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

MML Inflation-Protected and Income Fund —  Portfolio of Investments

March 31, 2022 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 96.0%
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 55.9%
Automobile Asset-Backed Securities — 3.2%
Carvana Auto Receivables Trust
Series 2020-N3, Class B, 0.660% 6/12/28	$	5,879,000	$	5,783,886
Series 2021-P2, 1.880% 5/10/28 (a)		334,835		334,539
Westlake Automobile Receivables Trust, Series 2020-3A, Class D
1.650% 2/17/26 (a)		2,306,000		2,236,385
				8,354,810
Commercial Mortgage-Backed Securities — 2.7%
BHMS Mortgage Trust, Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500%
1.897% FRN 7/15/35 (a)		1,000,000		982,502
BX Commercial Mortgage Trust, Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000%
2.397% FRN 10/15/36 (a)		1,487,500		1,459,683
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class D, 1 mo. USD LIBOR + 1.750%
2.147% FRN 12/15/37 (a)		308,865		303,667
Credit Suisse Mortgage Capital Certificates, Series 2019-ICE4, Class D, 1 mo. USD LIBOR + 1.600%
1.997% FRN 5/15/36 (a)		4,000,000		3,955,023
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800%
2.197% FRN 5/15/36 (a)		476,000		469,186
				7,170,061
Home Equity Asset-Backed Securities — 1.4%
Centex Home Equity Loan Trust, Series 2006-A, Class M1, 1 mo. USD LIBOR + .450%
0.907% FRN 6/25/36		437,375		435,306
Citigroup Mortgage Loan Trust, Series 2006-HE2, Class M1, 1 mo. USD LIBOR + .435%
0.892% FRN 8/25/36		705,920		701,477
Home Equity Asset Trust, Series 2005-9, Class M1, 1 mo. USD LIBOR + .615%
1.072% FRN 4/25/36		1,924,678		1,901,221
Residential Asset Securities Trust, Series 2005-EMX1, Class M1, 1 mo. USD LIBOR + .645%
1.102% FRN 3/25/35		691,467		689,960
				3,727,964
Other Asset-Backed Securities — 28.1%
321 Henderson Receivables LLC
Series 2006-1A, Class A1, 1 mo. USD LIBOR + .200% 0.597% FRN 3/15/41 (a)		100,078		99,707

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

	Principal Amount		Value
Series 2006-3A, Class A1, 1 mo. USD LIBOR + .200% 0.597% FRN 9/15/41 (a)	$	72,981	$	71,607
Series 2006-4A, Class A1, 1 mo. USD LIBOR + .200% 0.597% FRN 12/15/41 (a)		36,044		36,007
Affirm Asset Securitization Trust
Series 2021-Z1, Class A, 1.070% 8/15/25 (a)		1,654,225		1,629,526
Series 2021-Z2, Class A, 1.170% 11/16/26 (a)		1,438,099		1,407,131
Series 2022-X1, Class A, 1.750% 2/15/27 (a)		2,143,000		2,117,639
Series 2020-Z2, Class A, 1.900% 1/15/25 (a)		1,479,876		1,471,751
Series 2021-A, Class D, 3.490% 8/15/25 (a)		1,600,000		1,579,470
Series 2020-A, Class B, 3.540% 2/18/25 (a)		1,000,000		999,189
BHG Securitization Trust, Series 2021-B, Class A
0.900% 10/17/34 (a)		1,393,901		1,346,565
Cascade Funding Mortgage Trust, Series 2021-EBO1, Class A,
0.985% VRN 11/25/50 (a) (b)		1,948,005		1,918,122
Citigroup Mortgage Loan Trust, Series 2006-WFH2, Class M1, 1 mo. USD LIBOR + .405%
0.862% FRN 8/25/36		553,405		552,648
Crossroads Asset Trust, Series 2021-A, Class A2
0.820% 3/20/24 (a)		399,187		395,998
FCI Funding LLC
Series 2021-1A, Class A, 1.130% 4/15/33 (a)		2,699,917		2,672,368
Series 2021-1A, Class B, 1.530% 4/15/33 (a)		1,800,157		1,783,760
Series 2019-1A, Class A, 3.630% 2/18/31 (a)		33,284		33,334
First Franklin Mortgage Loan Trust
Series 2006-FF15, Class A5, 1 mo. USD LIBOR + .160% 0.617% FRN 11/25/36		532,127		521,169
Series 2005-FF9, Class A4, 1 mo. USD LIBOR + .720% 1.177% FRN 10/25/35		354,348		353,248
FNA VI LLC, Series 21-1A, Class A
1.350% 1/10/32 (a)		3,602,304		3,439,093
FREED ABS Trust, Series 2021-2, Class B
1.030% 6/19/28 (a)		2,348,000		2,321,229
Gracie Point International Funding
Series 2021-1A, Class A, 1 mo. USD LIBOR + .750% 0.981% FRN 11/01/23 (a)		5,832,076		5,830,282
Series 2022-1A, Class C, 30 Day SOFR + .350% 3.555% FRN 4/01/24 (a) (c)		1,700,000		1,700,000
Series 2022-1A, Class E, 30 Day SOFR + .575% 5.800% FRN 4/01/24 (a) (c)		800,000		799,959
JP Morgan Mortgage Acquisition Trust, Series 2007-CH3, Class A5, 1 mo. USD LIBOR + .260%
0.717% FRN 3/25/37		214,158		211,673
KREF Ltd., Series 2021-FL2, Class D, 1 mo. USD LIBOR + 2.200%
2.641% FRN 2/15/39 (a)		700,000		692,583
LCM Ltd., Series 19A, Class AR, 3 mo. USD LIBOR + 1.240%
1.481% FRN 7/15/27 (a)		495,811		495,518
Lendmark Funding Trust, Series 2019-2A, Class A
2.780% 4/20/28 (a)		6,600,000		6,534,702
Long Beach Mortgage Loan Trust, Series 2006-WL1, Class 2A4, 1 mo. USD LIBOR + .680%
1.137% FRN 1/25/46		120,221		120,172
Marlette Funding Trust
Series 2020-1A, Class B, 2.380% 3/15/30 (a)		550,822		551,039
Series 2019-2A, Class B, 3.530% 7/16/29 (a)		1,895		1,896
New Residential Advance Receivables Trust Advance Receivables Backed
Series 2020-T1, Class AT1, ABS, 144A, 1.426% 8/15/53 (a)		2,250,000		2,196,711
Series 2020-T1, Class BT1, 1.823% 8/15/53 (a)		1,100,000		1,074,607

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

	Principal Amount		Value
NP SPE II LP, Series 2019-1A, Class A1
2.574% 9/20/49 (a)	$	240,442	$	226,822
NRZ Advance Receivables Trust, Series 2020-T3, Class CT3
1.814% 10/15/52 (a)		536,400		511,725
Oportun Funding LLC
3.250% 6/15/29 (a)		2,900,000		2,891,979
Orange Lake Timeshare Trust, Series 2016-A, Class A
2.610% 3/08/29 (a)		90,473		90,586
Pagaya AI Debt Selection Trust, Series 2021-3, Class A
1.150% 5/15/29 (a)		3,331,557		3,268,127
Pagaya AI Debt Trust 2022-1, Series 2022-1, Class A
2.030% 10/15/29 (a)		10,600,000		10,400,518
Sierra Receivables Funding LLC
Series 2019-3A, Class C, 3.000% 8/20/36 (a)		1,107,846		1,093,861
Series 2019-1A, Class C, 3.770% 1/20/36 (a)		250,440		250,820
Series 2019-3A, Class D, 4.180% 8/20/36 (a)		283,671		279,612
Series 2019-1A, Class D, 4.750% 1/20/36 (a)		226,589		226,486
Sierra Timeshare Receivables Funding LLC, Series 2019-2A, Class C
3.120% 5/20/36 (a)		1,858,949		1,832,250
SoFi Consumer Loan Program Trust, Series 2019-3, Class D
3.890% 5/25/28 (a)		946,000		951,834
Structured Asset Investment Loan Trust, Series 2005-2, Class M2, 1 mo. USD LIBOR + .735%
1.192% FRN 3/25/35		837,312		833,872
Structured Asset Securities Corp. Mortgage Loan Trust
Series 2006-BC6, Class A4, 1 mo. USD LIBOR + .170% 0.627% FRN 1/25/37		267,273		263,811
Series 2006-WF1, Class M4, 1 mo. USD LIBOR + .645% 1.102% FRN 2/25/36		426,039		425,071
Series 2006-GEL1, Class M2, 1 mo. USD LIBOR + 1.200% 1.657% FRN 11/25/35 (a)		601,581		589,111
Upstart Securitization Trust
Series 2021-4, Class A, 0.840% 9/20/31 (a)		4,586,777		4,461,357
Series 2020-3, Class A, 1.702% 11/20/30 (a)		915,769		912,739
				74,469,284
Student Loans Asset-Backed Securities — 7.7%
Chase Education Loan Trust, Series 2007-A, Class A4, 3 mo. USD LIBOR + .100%
1.066% FRN 3/28/68		2,188,434		2,120,528
College Loan Corp. Trust, Series 2005-2, Class B, 3 mo. USD LIBOR + .490%
0.729% FRN 1/15/37		332,755		302,689
Commonbond Student Loan Trust
Series 2021-AGS, Class B, 1.400% 3/25/52 (a)		184,161		173,024
Series 2018-CGS, Class C, 4.350% 2/25/46 (a)		17,137		16,287
DRB Prime Student Loan Trust, Series 2017-A, Class A1, 1 mo. USD LIBOR + .850%
1.307% FRN 5/27/42 (a)		547,242		547,361
EdLinc Student Loan Funding Trust, Series 2017-A, Class A, PRIME - 1.150%
2.100% FRN 12/01/47 (a)		326,885		323,016
Edsouth Indenture
No.9 LLC, Series 2015-1, Class A, 1 mo. USD LIBOR + .800% 1.257% FRN 10/25/56 (a)		265,822		265,149
No.10 LLC, Series 2015-2, Class B, 1 mo. USD LIBOR + 1.500% 1.957% FRN 12/25/58 (a)		1,000,000		998,383

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

	Principal Amount		Value
ELFI Graduate Loan Program LLC, Series 2018-A, Class A1, 1 mo. USD LIBOR + .750%
1.207% FRN 8/25/42 (a)	$	262,044	$	261,634
Goal Capital Funding Trust, Series 2010-1, Class A, 3 mo. USD LIBOR + .700%
1.198% FRN 8/25/48 (a)		172,173		171,295
JP Morgan Student Loan Trust, Series 2007-A, Class B, 3 mo. USD LIBOR + .350%
0.628% FRN 6/28/39 (a)		378,667		346,184
KeyCorp Student Loan Trust, Series 2005-A, Class 2B, 3 mo. USD LIBOR + .730%
1.696% FRN 9/27/38		386,252		385,829
Laurel Road Prime Student Loan Trust, Series 2019-A, Class A1FX
2.340% 10/25/48 (a)		188,133		187,349
Navient Private Education Refi Loan Trust
Series 2021-A, Class A, 0.840% 5/15/69 (a)		2,470,665		2,361,489
Series 2020-HA, Class A, 1.310% 1/15/69 (a)		488,848		473,502
Navient Student Loan Trust
Series 2017-3A, Class A2, 1 mo. USD LIBOR + .600% 1.057% FRN 7/26/66 (a)		343,838		343,070
Series 2015-AA, Class A2B, 1 mo. USD LIBOR + 1.200% 1.597% FRN 12/15/28 (a)		159,852		159,901
Series 2017-1A, Class A3, 1 mo. USD LIBOR + 1.150% 1.607% FRN 7/26/66 (a)		396,940		395,943
Nelnet Private Education Loan Trust, Series 2016-A, Class A1A, 1 mo. USD LIBOR + 1.750%
2.207% FRN 12/26/40 (a)		65,686		65,651
Nelnet Student Loan Trust
Series 2006-2, Class B, 3 mo. USD LIBOR + .200% 0.458% FRN 1/25/38		532,391		477,320
Series 2004-3, Class B, 3 mo. USD LIBOR + .350% 0.608% FRN 10/25/40		870,503		799,388
Series 2005-2, Class B, 3 mo. USD LIBOR + .170% 1.104% FRN 3/23/37		854,830		784,085
Series 2006-3, Class B, 3 mo. USD LIBOR + .250% 1.216% FRN 6/25/41		256,646		235,946
Series 2014-2A, Class B, 1 mo. USD LIBOR + 1.500% 1.957% FRN 6/25/41 (a)		375,000		374,998
SLC Student Loan Trust
Series 2006-2, Class B, 3 mo. USD LIBOR + .230% 1.056% FRN 12/15/39		941,056		849,031
Series 2005-2, Class B, 3 mo. USD LIBOR + .280% 1.106% FRN 3/15/40		1,425,854		1,329,002
SLM Student Loan Trust
Series 2005-5, Class A4, 3 mo. USD LIBOR + .140% 0.398% FRN 10/25/28		186,329		185,400
Series 2006-4, Class B, 3 mo. USD LIBOR + .200% 0.458% FRN 1/25/70		285,849		267,185
Series 2006-5, Class B, 3 mo. USD LIBOR + .210% 0.468% FRN 10/25/40		322,919		301,359
Series 2006-2, Class B, 3 mo. USD LIBOR + .220% 0.478% FRN 1/25/41		333,969		312,540
Series 2003-14, Class A6, 3 mo. USD LIBOR + .300% 0.558% FRN 7/25/25		99,092		98,940
Series 2005-8, Class B, 3 mo. USD LIBOR + .310% 0.568% FRN 1/25/55		299,071		283,673
Series 2004-8, Class B, 3 mo. USD LIBOR + .460% 0.718% FRN 1/25/40		327,961		309,920
Series 2004-3, Class B, 3 mo. USD LIBOR + .470% 0.728% FRN 10/25/64		228,338		217,789
Series 2003-11, Class B, 3 mo. USD LIBOR + .650% 1.476% FRN 12/15/38		327,414		311,430
SMB Private Education Loan Trust
Series 2018-B, Class A2B, 1 mo. USD LIBOR + .720% 1.117% FRN 1/15/37 (a)		882,960		879,698
Series 2019-A, Class A2B, 1 mo. USD LIBOR + .870% 1.267% FRN 7/15/36 (a)		1,109,969		1,109,438
SoFi Alternative Trust, Series 2019-C, Class PT,
3.997% VRN 1/25/45 (a) (b)		744,650		767,229
SoFi Professional Loan Program LLC

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

	Principal Amount		Value
Series 2017-A, Class A1, 1 mo. USD LIBOR + .700% 1.157% FRN 3/26/40 (a)	$	87,676	$	87,597
Series 2016-B, Class A2B, 2.740% 10/25/32 (a)		427,605		427,603
				20,307,855
Whole Loan Collateral Collateralized Mortgage Obligations — 12.8%
Angel Oak Mortgage Trust, Series 2022-2, Class A1,
3.353% VRN 1/25/67 (a)		2,283,554		2,252,161
Angel Oak Mortgage Trust 2020-6, Series 2020-6, Class A1,
1.261% VRN 5/25/65 (a) (b)		1,261,867		1,233,646
CIM Trust, Series 2019-INV3, Class A11, 1 mo. USD LIBOR + 1.000%
1.137% FRN 8/25/49 (a)		1,086,012		1,083,616
Citigroup Mortgage Loan Trust, Series 2019-IMC1, Class A3,
3.030% VRN 7/25/49 (a) (b)		250,888		250,136
COLT Mortgage Loan Trust, Series 2022-1, Class A1,
2.284% VRN 12/27/66 (a) (b)		7,539,193		7,298,208
Lakeview Trust, Series 2022-1, Class M3
4.585% 4/25/52 (a) (d)		700,000		700,000
NewRez Warehouse Securitization Trust, Series 2021-1, Class A, 1 mo. USD LIBOR + .750%
1.207% FRN 5/25/55 (a)		4,667,000		4,634,566
Oceanview Trust 2021-EBO1
Series 2021-1, Class A, 1.219% VRN 12/29/51 (a) (b)		4,232,843		4,180,749
Series 2021-1, Class M3, 3.090% VRN 12/29/51 (a) (b)		2,000,000		1,948,413
Onslow Bay Financial LLC
Series 2021-NQM2, Class A2, 1.357% VRN 5/25/61 (a) (b)		1,639,617		1,548,954
Series 2020-EXP1, Class 2A2, 1 mo. USD LIBOR + .950% 1.407% FRN 2/25/60 (a)		504,582		503,726
Opteum Mortgage Acceptance Corp. Asset Backed Pass-Through Certificates, Series 2005-4, Class 1APT, 1 mo. USD LIBOR + .620%
1.077% FRN 11/25/35		271,499		270,880
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850%
3.307% FRN 2/25/23 (a)		440,000		438,103
PSMC Trust, Series 2020-2, Class A2,
3.000% VRN 5/25/50 (a) (b)		868,076		860,511
STAR Trust, Series 2021-1, Class A3,
1.528% VRN 5/25/65 (a) (b)		4,547,551		4,349,496
Starwood Mortgage Residential Trust, Series 2019-INV1, Class A3,
2.916% VRN 9/27/49 (a) (b)		919,707		911,170
Verus Securitization Trust
Series 2021-3, Class A3, 1.437% VRN 6/25/66 (a) (b)		978,548		924,478
Series 2019-INV2, Class A3, 3.219% VRN 7/25/59 (a) (b)		563,978		559,331
				33,948,144
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $149,355,358)				147,978,118
U.S. Government Agency Obligations and Instrumentalities (e) — 11.7%
Pass-Through Securities — 0.0%
Federal Home Loan Mortgage Corp. Pool #1Q0239, 1 year CMT + 2.189% 2.346% 3/01/37		108,459		112,441
Whole Loans — 11.7%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes

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

	Principal Amount		Value
Series 2021-DNA1, Class M1, 30 Day SOFR + .650% 0.749% FRN 1/25/51 (a)	$	98,685	$	98,439
Series 2021-DNA6, Class M1, 30 Day SOFR + .800% 0.899% FRN 10/25/41 (a)		6,550,000		6,479,437
Series 2021-HQA3, Class M1, 30 Day SOFR + .850% 0.949% FRN 9/25/41 (a)		7,667,000		7,473,370
Series 2020-DNA6, Class M1, 30 Day SOFR + .900% 0.999% FRN 12/25/50 (a)		140,701		140,490
Series 2018-DNA2, Class M2AS, 1 mo. USD LIBOR + .950% 1.407% FRN 12/25/30 (a)		3,951,640		3,928,198
Series 2020-DNA1, Class M2, 1 mo. USD LIBOR + 1.700% 2.157% FRN 1/25/50 (a)		1,821,881		1,820,331
Series 2018-DNA3, Class M2A, 1 mo. USD LIBOR + 2.100% 2.557% FRN 9/25/48 (a)		1,267,541		1,269,210
Series 2018-DNA2, Class M2A, 1 mo. USD LIBOR + 2.150% 2.607% FRN 12/25/30 (a)		3,754,058		3,763,223
Series 2020-DNA5, Class M2, 30 Day SOFR + 2.800% 2.899% FRN 10/25/50 (a)		292,673		293,740
Federal National Mortgage Association Connecticut Avenue Securities Trust
Series 2021-R01, Class 1M1, 30 Day SOFR + .750% 0.849% FRN 10/25/41 (a)		2,612,872		2,594,133
Series 2019-R05, Class 1M2, 1 mo. USD LIBOR + 2.000% 2.457% FRN 7/25/39 (a)		143,880		143,901
Series 2019-R03, Class 1M2, 1 mo. USD LIBOR + 2.150% 2.607% FRN 9/25/31 (a)		1,929,477		1,933,301
Series 2019-R02, Class 1M2, 1 mo. USD LIBOR + 2.300% 2.757% FRN 8/25/31 (a)		1,037,788		1,038,125
				30,975,898
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $31,424,419)				31,088,339
U.S. TREASURY OBLIGATIONS — 28.4%
U.S. Treasury Bonds & Notes — 28.4%
U.S. Treasury Inflation Index
0.125% 2/15/52		151,454		159,772
0.125% 7/15/24		2,988,918		3,139,590
0.125% 10/15/24		3,396,112		3,558,024
0.125% 4/15/25		1,958,688		2,050,234
0.125% 10/15/25		1,733,216		1,819,606
0.125% 4/15/26		2,143,540		2,244,730
0.125% 7/15/26		2,931,475		3,087,095
0.125% 10/15/26		1,902,910		2,002,553
0.125% 1/15/30		2,621,904		2,773,722
0.125% 7/15/30		2,850,276		3,035,915
0.125% 1/15/31		3,050,237		3,247,271
0.125% 7/15/31		2,831,490		3,027,445
0.125% 1/15/32 (f)		2,534,900		2,712,277
0.125% 2/15/51		2,429,078		2,528,391
0.250% 1/15/25		2,403,047		2,524,138
0.250% 7/15/29		2,692,109		2,880,206
0.250% 2/15/50		655,956		699,712
0.375% 7/15/25 (g)		2,838,650		3,007,583
0.375% 1/15/27		2,152,623		2,285,732
0.375% 7/15/27		2,642,746		2,819,514
0.500% 1/15/28		1,452,850		1,557,727
0.625% 1/15/26		1,449,065		1,547,641

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

	Principal Amount		Value
0.625% 2/15/43	$	978,024	$	1,103,181
0.750% 7/15/28		2,043,526		2,239,856
0.750% 2/15/42		1,306,095		1,508,421
0.750% 2/15/45		1,104,089		1,282,253
0.875% 1/15/29		2,226,300		2,463,975
0.875% 2/15/47		582,190		706,087
1.000% 2/15/46		237,248		292,229
1.000% 2/15/48		911,848		1,146,174
1.000% 2/15/49		502,641		637,366
1.375% 2/15/44		1,447,212		1,877,569
2.000% 1/15/26		849,684		953,704
2.125% 2/15/40		390,126		554,807
2.125% 2/15/41		834,269		1,191,624
2.375% 1/15/25		2,087,582		2,320,763
2.375% 1/15/27		418,128		485,935
2.500% 1/15/29		785,484		958,950
3.375% 4/15/32		395,878		560,669
3.625% 4/15/28		782,010		992,527
3.875% 4/15/29		854,880		1,133,902
				75,118,870
TOTAL U.S. TREASURY OBLIGATIONS (Cost $77,208,062)				75,118,870
TOTAL BONDS & NOTES (Cost $257,987,839)				254,185,327
TOTAL PURCHASED OPTIONS (#) — 0.7% (Cost $1,845,236)				1,890,498
MUTUAL FUNDS — 1.0%
Diversified Financial Services — 1.0%
State Street Navigator Securities Lending Government Money Market Portfolio (h)		2,716,698		2,716,698
TOTAL MUTUAL FUNDS (Cost $2,716,698)				2,716,698
TOTAL LONG-TERM INVESTMENTS (Cost $262,549,773)				258,792,523
SHORT-TERM INVESTMENTS — 5.6%
Commercial Paper — 3.4%
Ingredion, Inc.
0.913% 4/11/22 (a)		3,000,000		2,999,432
Mccormick & Co, Inc.
0.608% 4/06/22 (a)		3,000,000		2,999,718
NRW Bank
0.289% 4/12/22 (a)		1,000,000		999,903
Sempra Energy
0.700% 4/18/22 (a)		2,000,000		1,999,242
				8,998,295

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

	Principal Amount		Value
Repurchase Agreement — 2.2%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/22, 0.000%, due 4/01/22 (i)	$	5,827,618	$	5,827,618
TOTAL SHORT-TERM INVESTMENTS (Cost $14,825,823)				14,825,913
TOTAL INVESTMENTS — 103.3% (Cost $277,375,596) (j)				273,618,436
Other Assets/(Liabilities) — (3.3)%				(8,706,430)
NET ASSETS — 100.0%			$	264,912,006

Abbreviation Legend

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, 2022, the aggregate market value of these securities amounted to $165,315,863 or 62.40% 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, 2022.

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

(d) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At March 31, 2022, these securities amounted to a value of $700,000 or 0.26% of net assets.

(e) May contain securities that are issued by a U.S. Government Agency, but are unsecured and are not guaranteed by a U.S. Government Agency.

(f) Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2022, was $2,661,102 or 1.00% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments.

(g) All or a portion of this security is pledged/held as collateral for open derivatives.

(h) Represents investment of security lending cash collateral. (Note 2).

(i) Maturity value of $5,827,618. Collateralized by U.S. Government Agency obligations with a rate of 0.375%, maturity date of 9/15/24, and an aggregate market value, including accrued interest, of $5,944,248.

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

(#) Interest Rate Swaptions Purchased
			Paid by Fund		Received by Fund
Description	Counterparty	Expiration Date	Rate	Frequency	Rate	Frequency	Notional Amount		Value		Premium Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	3-Month USD LIBOR BBA	Quarterly	2.44%##	Semi-Annual	USD	1,967,000	$	137,061	$	98,335	$	38,726
Put
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	2.94%##	Semi-Annual	3-Month USD LIBOR BBA	Quarterly	USD	22,880,000	$	1,165,736	$	1,143,840	$	21,896
10-Year Interest Rate Swap, 2/02/43	Credit Suisse International	1/31/33	3.11%##	Semi-Annual	3-Month USD LIBOR BBA	Quarterly	USD	12,590,000		587,701		603,061		(15,360)
										1,753,437		1,746,901		6,536
									$	1,890,498	$	1,845,236	$	45,262

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	6/21/22		26	$	4,036,574	$	(134,949)
U.S. Treasury Note 2 Year	6/30/22		21		4,472,666		(22,307)
						$	(157,256)
Short
U.S. Treasury Ultra 10 Year	6/21/22		31	$	(4,310,244)	$	110,713
U.S. Treasury Ultra Bond	6/21/22		9		(1,611,501)		17,376
						$	128,089

OTC Inflation-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)
3.630%	Maturity	U.S. Consumer Price Index	Maturity	Bank of America N.A.	12/02/23	USD	7,000,000	$	250,802	$	—	$	250,802
2.000%	Maturity	U.S. Consumer Price Index	Maturity	JP Morgan Chase Bank N.A.	12/24/23	USD	4,000,000		416,330		—		416,330
4.130%	Maturity	U.S. Consumer Price Index	Maturity	JP Morgan Chase Bank N.A.	3/09/24	USD	8,000,000		69,378		—		69,378
								$	736,510	$	—	$	736,510

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

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)
0.00%	Maturity	Bloomberg Barclays US Treasury Inflation Notes TR Index	Maturity	BNP Paribas SA	7/29/22	32,807,085	$	(335,134)	$	—	$	(335,134)
0.00%	Maturity	Bloomberg Barclays US Treasury Inflation Notes TR Index	Maturity	BNP Paribas SA	8/31/22	55,570,512		(1,033,460)		—		(1,033,460)
0.20%	Maturity	Bloomberg Barclays US Treasury Inflation Notes TR Index	Maturity	Goldman Sachs International	5/31/22	10,445,535		(283,752)		—		(283,752)
0.00%	Maturity	Bloomberg Barclays US Treasury Inflation Notes TR Index	Maturity	Goldman Sachs International	7/29/22	41,389,577		(422,807)		—		(422,807)
0.00%	Maturity	Bloomberg Barclays US Treasury Inflation Notes TR Index	Maturity	Goldman Sachs International	8/31/22	46,308,698		(861,216)		—		(861,216)
							$	(2,936,369)	$	—	$	(2,936,369)

## Exercise Rate.

Currency Legend

USD U.S. Dollar

MML iShares 60/40 Allocation Fund —  Portfolio of Investments

March 31, 2022 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 104.7%
Equity Funds — 59.3%
iShares Core Dividend Growth ETF		14,409	$	769,584
iShares Core MSCI Emerging Markets ETF		9,251		513,893
iShares Core MSCI International Developed Markets ETF		52,390		3,333,576
iShares Core S&P 500 ETF		5,078		2,303,838
iShares Core S&P Mid-Cap ETF		1,893		507,967
iShares Core S&P Total US Stock Market ETF		78,505		7,924,295
				15,353,153
Fixed Income Funds — 45.4%
iShares 20+ Year Treasury Bond ETF		4,002		528,584
iShares Broad USD High Yield Corporate Bond ETF		6,689		259,935
iShares Core International Aggregate Bond ETF		2,519		131,316
iShares Core U.S. Aggregate Bond ETF		77,122		8,259,766
iShares Trust iShares 1-5 Year Investment Grade Corporate Bond ETF (a)		25,302		1,308,619
State Street Navigator Securities Lending Government Money Market Portfolio (b)		1,255,040		1,255,040
				11,743,260
TOTAL MUTUAL FUNDS (Cost $27,442,165)				27,096,413
TOTAL LONG-TERM INVESTMENTS (Cost $27,442,165)				27,096,413
TOTAL INVESTMENTS — 104.7% (Cost $27,442,165) (c)				27,096,413
Other Assets/(Liabilities) — (4.7)%				(1,224,247)
NET ASSETS — 100.0%			$	25,872,166

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, 2022, was $1,224,730 or 4.73% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. (Note 2).
(b)	Represents investment of security lending cash collateral. (Note 2).
(c)	See Note 3 for aggregate cost for federal tax purposes.

MML iShares 80/20 Allocation Fund —  Portfolio of Investments

March 31, 2022 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 104.4%
Diversified Financial Services — 104.4%
iShares 20+ Year Treasury Bond ETF		2,238	$	295,595
iShares Broad USD High Yield Corporate Bond ETF		7,482		290,750
iShares Core Dividend Growth ETF		16,116		860,756
iShares Core International Aggregate Bond ETF		5,634		293,700
iShares Core MSCI Emerging Markets ETF		25,867		1,436,912
iShares Core MSCI International Developed Markets ETF		67,609		4,301,961
iShares Core S&P 500 ETF		5,049		2,290,681
iShares Core S&P Mid-Cap ETF		4,235		1,136,420
iShares Core S&P Total US Stock Market ETF		127,457		12,865,510
iShares Core U.S. Aggregate Bond ETF		32,859		3,519,199
iShares Trust iShares 1-5 Year Investment Grade Corporate Bond ETF (a)		28,299		1,463,624
State Street Navigator Securities Lending Government Money Market Portfolio (b)		1,397,557		1,397,557
TOTAL MUTUAL FUNDS (Cost $30,389,737)				30,152,665
TOTAL LONG-TERM INVESTMENTS (Cost $30,389,737)				30,152,665
TOTAL INVESTMENTS — 104.4% (Cost $30,389,737) (c)				30,152,665
Other Assets/(Liabilities) — (4.4)%				(1,259,399)
NET ASSETS — 100.0%			$	28,893,266

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, 2022, was $1,363,805 or 4.72% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. This amount is not reflected on the Portfolio of Investments. (Note 2).

(b) Represents investment of security lending cash collateral. (Note 2).

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

MML Managed Bond Fund —  Portfolio of Investments

March 31, 2022 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 99.1%
CORPORATE DEBT — 36.9%
Aerospace & Defense — 0.3%
The Boeing Co.
5.150% 5/01/30	$	2,200,000	$	2,346,483
5.930% 5/01/60		605,000		698,155
				3,044,638
Agriculture — 1.1%
Altria Group, Inc.
5.800% 2/14/39		1,375,000		1,483,128
BAT Capital Corp.
2.259% 3/25/28		725,000		651,691
4.700% 4/02/27		2,365,000		2,429,066
4.758% 9/06/49		540,000		496,495
Imperial Brands Finance PLC
3.875% 7/26/29 (a)		2,764,000		2,705,561
Reynolds American, Inc.
5.850% 8/15/45		985,000		1,008,199
Viterra Finance BV
3.200% 4/21/31 (a)		1,315,000		1,210,280
				9,984,420
Airlines — 0.2%
Spirit Airlines Pass-Through Trust, Series 2015-1, Class A,
4.100% 4/01/28		1,289,919		1,260,313
United Airlines Pass-Through Trust, Series 2018-1, Class B,
4.600% 3/01/26		384,450		351,299
				1,611,612
Auto Manufacturers — 0.8%
Ford Motor Credit Co. LLC
3.087% 1/09/23		1,410,000		1,410,423
4.140% 2/15/23		1,360,000		1,371,492
General Motors Co.
5.150% 4/01/38		800,000		813,332
6.800% 10/01/27		1,890,000		2,136,471
General Motors Financial Co., Inc.
3.100% 1/12/32		1,750,000		1,573,163
				7,304,881
Auto Parts & Equipment — 0.1%
Lear Corp.
3.550% 1/15/52 (b)		1,325,000		1,089,442

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount			Value
Banks — 6.8%
ABN AMRO Bank NV
4.750% 7/28/25 (a)	$	1,875,000		$	1,916,719
Bank Hapoalim BM 5 year CMT + 2.155%
3.255% VRN 1/21/32 (a)		2,600,000			2,392,000
Bank of America Corp.
SOFR + 1.220% 2.299% VRN 7/21/32		1,355,000			1,206,151
5 year CMT + 1.200% 2.482% VRN 9/21/36		2,635,000			2,265,838
SOFR + 2.150% 2.592% VRN 4/29/31		1,255,000			1,157,972
5 year CMT + 2.000% 3.846% VRN 3/08/37		2,145,000			2,054,449
4.183% 11/25/27		1,090,000			1,112,833
3 mo. USD LIBOR + 1.814% 4.244% VRN 4/24/38		1,150,000			1,198,394
3 mo. USD LIBOR + 1.310% 4.271% VRN 7/23/29		475,000			490,943
6.110% 1/29/37		1,550,000			1,851,963
7.750% 5/14/38		400,000			558,613
The Bank of Nova Scotia 3 mo. USD LIBOR + 2.648%
4.650% VRN (c)		3,575,000			3,450,769
Barclays PLC
4.337% 1/10/28		920,000			936,312
5.200% 5/12/26		1,320,000			1,372,483
BPCE SA SOFR + 1.730%
3.116% VRN 10/19/32 (a)		1,860,000			1,683,692
Citigroup, Inc.
4.450% 9/29/27		1,825,000			1,885,360
6.625% 6/15/32		1,525,000			1,843,201
Credit Suisse AG
6.500% 8/08/23 (a)		1,630,000			1,670,750
Deutsche Bank AG SOFR + 1.318%
2.552% VRN 1/07/28		2,580,000			2,381,252
Discover Bank 5 year USD Swap + 1.730%
4.682% VRN 8/09/28		1,955,000			1,983,454
First Republic Bank
4.375% 8/01/46		1,700,000			1,754,293
The Goldman Sachs Group, Inc.
5.950% 1/15/27		1,410,000			1,549,867
6.750% 10/01/37		1,795,000			2,262,378
HSBC Holdings PLC
SOFR + 1.285% 2.206% VRN 8/17/29		1,203,000			1,084,125
4.250% 3/14/24		995,000	��		1,010,259
4.250% 8/18/25		2,781,000			2,816,374
4.375% 11/23/26		699,000			712,829
JP Morgan Chase & Co.
SOFR + 2.515% 2.956% VRN 5/13/31		1,000,000			935,817
5.600% 7/15/41		1,125,000			1,363,966
Mizrahi Tefahot Bank Ltd. 5 year CMT + 2.250%
3.077% VRN 4/07/31 (a)		2,780,000			2,578,450
Morgan Stanley
SOFR + 1.360% 2.484% VRN 9/16/36		1,270,000			1,088,065
SOFR + 1.485% 3.217% VRN 4/22/42		1,345,000			1,238,528
4.350% 9/08/26		3,200,000			3,308,595
National Australia Bank Ltd. 5 year CMT + 1.700%
3.347% VRN 1/12/37 (a)		2,960,000			2,732,547
Societe Generale SA 1 year CMT + 1.000%
1.792% VRN 6/09/27 (a)		2,010,000			1,813,494
Valley National Bancorp
5.125% 9/27/23		1,530,000			1,571,725

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Wells Fargo & Co.
5.375% 11/02/43	$	909,000	$	1,055,303
				62,289,763
Beverages — 0.7%
Anheuser-Busch Cos. LLC/Anheuser-Busch InBev Worldwide, Inc.
4.900% 2/01/46		3,475,000		3,862,909
Bacardi Ltd.
5.150% 5/15/38 (a) (b)		450,000		489,539
Molson Coors Beverage Co.
4.200% 7/15/46		1,859,000		1,802,729
5.000% 5/01/42		360,000		381,152
				6,536,329
Biotechnology — 0.3%
Amgen, Inc.
3.000% 1/15/52		840,000		711,989
Bio-Rad Laboratories, Inc.
3.700% 3/15/32 (b)		1,935,000		1,912,444
				2,624,433
Chemicals — 0.5%
DuPont de Nemours, Inc.
5.319% 11/15/38		1,200,000		1,379,372
Syngenta Finance NV
4.441% 4/24/23 (a)		1,183,000		1,198,819
Yara International ASA
3.800% 6/06/26 (a)		1,850,000		1,849,428
				4,427,619
Computers — 0.2%
Apple, Inc.
2.650% 5/11/50		700,000		609,334
Dell International LLC / EMC Corp.
8.100% 7/15/36		325,000		427,442
Leidos, Inc.
2.300% 2/15/31		1,260,000		1,095,696
				2,132,472
Diversified Financial Services — 3.2%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust
3.300% 1/30/32		4,115,000		3,710,060
Antares Holdings LP
2.750% 1/15/27 (a)		1,275,000		1,122,185
3.950% 7/15/26 (a)		2,555,000		2,384,638
6.000% 8/15/23 (a)		1,330,000		1,358,346
8.500% 5/18/25 (a)		720,000		792,640
Ares Finance Co. III LLC 5 year CMT + 3.237%
4.125% VRN 6/30/51 (a)		1,585,000		1,505,596
Ares Finance Co. LLC
4.000% 10/08/24 (a)		2,080,000		2,092,593
Avolon Holdings Funding Ltd.
2.528% 11/18/27 (a)		2,755,000		2,437,723
3.250% 2/15/27 (a)		1,610,000		1,516,510
4.250% 4/15/26 (a)		2,976,000		2,938,314

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
5.500% 1/15/26 (a)	$	190,000	$	196,319
Blue Owl Finance LLC
3.125% 6/10/31 (a)		3,120,000		2,648,074
4.125% 10/07/51 (a)		1,675,000		1,327,059
Brookfield Finance, Inc.
4.350% 4/15/30		1,765,000		1,835,979
Global Aircraft Leasing Co. Ltd.
6.500% 9/15/24 (a)		1,449,648		1,318,411
Lazard Group LLC
3.625% 3/01/27		1,253,000		1,248,879
Synchrony Financial
2.875% 10/28/31		950,000		842,036
				29,275,362
Electric — 0.5%
CMS Energy Corp.
4.875% 3/01/44		780,000		862,360
Duke Energy Corp.
3.750% 9/01/46		1,500,000		1,412,918
NextEra Energy Capital Holdings, Inc. 5 year CMT + 2.547%
3.800% VRN 3/15/82		1,250,000		1,150,285
Pacific Gas and Electric Co.
2.500% 2/01/31		775,000		668,141
Puget Energy, Inc.
2.379% 6/15/28		840,000		769,404
				4,863,108
Food — 0.8%
JBS Finance Luxembourg SARL
3.625% 1/15/32 (a)		5,300,000		4,849,500
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc.
5.500% 1/15/30 (a)		776,000		793,289
Smithfield Foods, Inc.
2.625% 9/13/31 (a)		1,280,000		1,122,642
3.000% 10/15/30 (a)		943,000		855,946
				7,621,377
Gas — 0.4%
CenterPoint Energy Resources Corp.
6.625% 11/01/37		1,250,000		1,521,694
NiSource, Inc.
5.800% 2/01/42		950,000		1,093,388
NiSource, Inc.
4.800% 2/15/44		1,035,000		1,071,225
				3,686,307
Health Care – Services — 0.2%
City of Hope
4.378% 8/15/48		1,050,000		1,133,151
HCA, Inc.
3.500% 7/15/51		1,250,000		1,077,895
				2,211,046

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Insurance — 5.9%
Allianz SE 5 year CMT + 2.973%
3.500% VRN (a) (c)	$	4,200,000	$	3,979,500
Allstate Corp. 3 mo. USD LIBOR + 2.938%
5.750% VRN 8/15/53		2,885,000		2,863,363
American International Group, Inc. 3 mo. USD LIBOR + 2.868%
5.750% VRN 4/01/48 (b)		2,177,000		2,189,409
AmTrust Financial Services, Inc.
6.125% 8/15/23		3,370,000		3,378,125	��
Ascot Group Ltd.
4.250% 12/15/30 (a)		1,990,000		1,951,286
Athene Global Funding
2.673% 6/07/31 (a)		2,505,000		2,248,898
AXIS Specialty Finance LLC 5 year CMT + 3.186%
4.900% VRN 1/15/40		1,315,000		1,282,125
Brighthouse Financial, Inc.
4.700% 6/22/47		1,125,000		1,092,273
5.625% 5/15/30		3,067,000		3,362,472
CNO Financial Group, Inc.
5.250% 5/30/29		2,619,000		2,755,465
Enstar Finance LLC 5 year CMT + 5.468%
5.750% VRN 9/01/40		2,200,000		2,175,250
Enstar Group Ltd.
4.950% 6/01/29		2,480,000		2,574,666
Global Atlantic Fin Co.
3.125% 6/15/31 (a)		1,675,000		1,496,562
5 year CMT + 3.796% 4.700% VRN 10/15/51 (a)		3,060,000		2,884,050
Hanwha Life Insurance Co. Ltd. 5 year CMT + 1.850%
3.379% VRN 2/04/32 (a)		2,485,000		2,382,771
Hill City Funding Trust
4.046% 8/15/41 (a)		4,000,000		3,359,585
Liberty Mutual Group, Inc. 5 year CMT + 3.315%
4.125% VRN 12/15/51 (a)		1,220,000		1,149,850
Markel Corp. 5 year CMT + 5.662%
6.000% VRN (c)		1,580,000		1,635,300
MetLife Capital Trust IV
7.875% 12/15/37 (a)		725,000		864,563
New York Life Insurance Co.
3.750% 5/15/50 (a)		510,000		494,098
Prudential Financial, Inc.
3 mo. USD LIBOR + 3.920% 5.625% VRN 6/15/43		1,025,000		1,031,406
3 mo. USD LIBOR + 2.665% 5.700% VRN 9/15/48		2,440,000		2,489,239
3 mo. USD LIBOR + 4.175% 5.875% VRN 9/15/42		550,000		554,125
Sammons Financial Group, Inc.
3.350% 4/16/31 (a)		3,805,000		3,505,644
Teachers Insurance & Annuity Association of America
4.270% 5/15/47 (a)		750,000		791,973
USF&G Capital I
8.500% 12/15/45 (a)		885,000		1,233,862
				53,725,860
Internet — 0.4%
Expedia Group, Inc.
4.625% 8/01/27		1,330,000		1,381,642

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Netflix, Inc.
5.875% 11/15/28	$	1,687,000	$	1,859,580
				3,241,222
Investment Companies — 1.6%
Ares Capital Corp.
2.150% 7/15/26		1,850,000		1,674,107
BlackRock TCP Capital Corp.
3.900% 8/23/24		1,908,000		1,899,890
Blackstone Private Credit Fund
1.750% 9/15/24 (a)		335,000		315,008
2.625% 12/15/26 (a)		3,425,000		3,086,737
Golub Capital BDC, Inc.
2.500% 8/24/26		880,000		809,513
3.375% 4/15/24		2,438,000		2,401,809
OWL Rock Core, Income Corp.
4.700% 2/08/27 (a)		1,945,000		1,873,272
Sixth Street Specialty Lending, Inc.
3.875% 11/01/24		2,440,000		2,433,901
				14,494,237
Iron & Steel — 0.4%
Vale Overseas Ltd.
6.250% 8/10/26		2,400,000		2,643,480
6.875% 11/21/36		1,030,000		1,242,448
				3,885,928
Lodging — 0.2%
Las Vegas Sands Corp.
3.200% 8/08/24		2,070,000		1,977,880
Media — 1.0%
Charter Communications Operating LLC/Charter Communications Operating Capital
3.900% 6/01/52		765,000		642,700
6.484% 10/23/45		1,485,000		1,692,041
Comcast Corp.
2.887% 11/01/51 (a)		350,000		294,883
2.937% 11/01/56 (a)		1,184,000		977,061
3.969% 11/01/47		630,000		639,695
Discovery Communications LLC
4.000% 9/15/55		1,210,000		1,043,383
4.650% 5/15/50		490,000		474,688
Paramount Global
4.200% 5/19/32		872,000		873,367
4.950% 1/15/31		1,008,000		1,072,084
Time Warner Cable, Inc.
6.750% 6/15/39		985,000		1,142,943
				8,852,845
Metal Fabricate & Hardware — 0.2%
The Timken Co.
4.500% 12/15/28		2,055,000		2,112,347
Mining — 0.6%
Glencore Finance Canada Ltd.
5.550% STEP 10/25/42 (a)		894,000		989,817

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount			Value
Glencore Funding LLC
2.625% 9/23/31 (a)	$	2,685,000		$	2,402,115
3.875% 10/27/27 (a)		975,000			970,913
Teck Resources Ltd.
6.000% 8/15/40		850,000			975,566
					5,338,411
Oil & Gas — 2.2%
BP Capital Markets PLC
5 year CMT + 4.036% 4.375% VRN (c)		2,400,000			2,413,200
5 year CMT + 4.398% 4.875% VRN (c)		1,475,000			1,478,687
Cenovus Energy, Inc.
6.750% 11/15/39		765,000			945,302
Devon Energy Corp.
5.600% 7/15/41		800,000			924,011
EQT Corp.
3.900% 10/01/27		2,160,000			2,160,000
Marathon Petroleum Corp.
6.500% 3/01/41		1,120,000			1,381,156
Occidental Petroleum Corp.
6.600% 3/15/46		1,258,000			1,478,150
Ovintiv Exploration, Inc.
5.375% 1/01/26		1,650,000			1,750,750
Ovintiv, Inc.
6.500% 8/15/34		1,050,000			1,246,475
6.500% 2/01/38		545,000			645,853
Patterson-UTI Energy, Inc.
3.950% 2/01/28		1,355,000			1,268,341
5.150% 11/15/29		1,225,000			1,195,114
Petroleos Mexicanos
5.350% 2/12/28		665,000			633,100
6.375% 1/23/45		595,000			475,875
6.500% 3/13/27		585,000	��		594,067
6.625% 6/15/35		140,000			125,476
Santos Finance Ltd.
3.649% 4/29/31 (a)		1,490,000			1,396,055
					20,111,612
Oil & Gas Services — 0.6%
Halliburton Co.
5.000% 11/15/45		1,000,000			1,085,380
NOV, Inc.
3.600% 12/01/29 (b)		3,123,000			3,070,466
3.950% 12/01/42		1,506,000			1,325,581
					5,481,427
Pharmaceuticals — 0.9%
AbbVie, Inc.
4.700% 5/14/45		1,260,000			1,367,354
Bristol-Myers Squibb Co.
4.350% 11/15/47		830,000			909,808
Cigna Corp.
4.800% 7/15/46		880,000			973,170
CVS Health Corp.
5.050% 3/25/48		455,000			516,339
6.125% 9/15/39		560,000			691,778

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
CVS Pass-Through Trust
5.926% 1/10/34 (a)	$	967,772	$	1,070,220
7.507% 1/10/32 (a)		813,759		948,238
Utah Acquisition Sub, Inc.
5.250% 6/15/46		1,375,000		1,358,659
				7,835,566
Pipelines — 1.9%
Energy Transfer LP
4.200% 4/15/27		885,000		900,880
6.125% 12/15/45		1,000,000		1,103,230
3 mo. USD LIBOR + 4.028% 6.250% VRN (c)		2,370,000		2,029,312
EnLink Midstream Partners LP
4.150% 6/01/25		2,924,000		2,909,146
4.850% 7/15/26		951,000		953,378
Enterprise Products Operating LLC 3 mo. USD LIBOR + 3.033%
5.250% VRN 8/16/77		2,475,000		2,326,974
MPLX LP 3 mo. USD LIBOR + 4.652%
6.875% VRN (c)		1,775,000		1,739,500
Plains All American Pipeline LP 3 mo. USD LIBOR + 4.110%
6.125% VRN (c)		2,345,000		1,988,560
Plains All American Pipeline LP / PAA Finance Corp.
4.500% 12/15/26		1,050,000		1,078,574
Plains All American Pipeline LP/PAA Finance Corp.
3.800% 9/15/30		1,150,000		1,128,160
4.700% 6/15/44		1,195,000		1,122,368
6.650% 1/15/37		375,000		425,511
				17,705,593
Private Equity — 0.8%
Apollo Management Holdings LP 5 year CMT + 3.266%
4.950% VRN 1/14/50 (a)		1,505,000		1,426,181
Hercules Capital, Inc.
2.625% 9/16/26		3,284,000		3,020,109
3.375% 1/20/27		1,745,000		1,640,514
KKR Group Finance Co. VIII LLC
3.500% 8/25/50 (a)		710,000		618,983
KKR Group Finance Co. X LLC
3.250% 12/15/51 (a)		1,035,000		862,103
				7,567,890
Real Estate Investment Trusts (REITS) — 2.2%
Broadstone Net Lease LLC
2.600% 9/15/31		1,835,000		1,634,229
Global Net Lease, Inc./Global Net Lease Operating Partnership LP
3.750% 12/15/27 (a)		2,625,000		2,423,265
Host Hotels & Resorts LP
2.900% 12/15/31		580,000		519,023
3.500% 9/15/30		2,120,000		2,021,601
Invitation Homes Operating Partnership LP
4.150% 4/15/32 (d)		505,000		515,816
Kimco Realty Corp.
4.125% 12/01/46		710,000		705,662
4.450% 9/01/47		800,000		835,162
Omega Healthcare Investors, Inc.
3.375% 2/01/31		1,625,000		1,488,846

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Piedmont Operating Partnership LP
2.750% 4/01/32	$	1,035,000	$	922,378
Rexford Industrial Realty LP
2.125% 12/01/30		533,000		466,020
Service Properties Trust
4.500% 6/15/23		760,000		752,932
4.950% 10/01/29		1,155,000		996,187
Spirit Realty LP
2.700% 2/15/32		550,000		494,968
3.200% 1/15/27		2,280,000		2,233,402
3.400% 1/15/30		515,000		498,097
4.000% 7/15/29		1,290,000		1,303,771
WEA Finance LLC
2.875% 1/15/27 (a) (b)		2,420,000		2,302,817
WP Carey, Inc.
2.450% 2/01/32		596,000		526,625
				20,640,801
Software — 0.3%
Electronic Arts, Inc.
2.950% 2/15/51		1,100,000		916,476
Microsoft Corp.
2.921% 3/17/52		2,064,000		1,935,615
				2,852,091
Telecommunications — 1.4%
AT&T, Inc.
3.500% 9/15/53		328,000		288,068
3.550% 9/15/55		5,153,000		4,542,052
British Telecommunications PLC
9.625% STEP 12/15/30		700,000		955,165
Crown Castle Towers LLC
4.241% 7/15/28 (a)		2,750,000		2,827,227
Verizon Communications, Inc.
2.875% 11/20/50		755,000		630,445
2.987% 10/30/56		2,292,000		1,885,290
Vodafone Group PLC
5.250% 5/30/48		1,150,000		1,287,259
				12,415,506
Transportation — 0.2%
CSX Corp.
4.750% 11/15/48		650,000		744,037
Norfolk Southern Corp.
4.050% 8/15/52		860,000		902,655
				1,646,692
TOTAL CORPORATE DEBT (Cost $354,807,578)				338,588,717
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 26.6%
Automobile Asset-Backed Securities — 0.4%
Santander Revolving Auto Loan Trust, Series 2019-A, Class D
3.450% 1/26/32 (a)		1,087,000		1,074,242

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Westlake Automobile Receivables Trust, Series 2021-1A, Class E
2.330% 8/17/26 (a)	$	3,226,000	$	3,037,869
				4,112,111
Commercial Mortgage-Backed Securities — 8.7%
Aventura Mall Trust, Series 2018-AVM, Class C,
4.112% VRN 7/05/40 (a) (e)		4,270,000		4,492,681
BAMLL Commercial Mortgage Securities Trust, Series 2018-DSNY, Class C, 1 mo. USD LIBOR + 1.350%
1.747% FRN 9/15/34 (a)		670,000		654,931
BANK, Series 2020-BN30, Class MCDF,
2.918% VRN 12/15/53 (e)		2,100,000		1,786,061
BBCMS Mortgage Trust
Series 2018-CHRS, Class B, 4.267% VRN 8/05/38 (a) (e)		2,250,000		2,194,447
Series 2018-CHRS, Class C, 4.267% VRN 8/05/38 (a) (e)		1,610,000		1,515,967
Series 2018-CHRS, Class D, 4.267% VRN 8/05/38 (a) (e)		1,370,000		1,222,557
Benchmark Mortgage Trust
Series 2021-B23, Class 360A, 2.760% VRN 2/15/54 (a) (e)		2,200,000		1,975,781
Series 2021-B23, Class 360B, 2.760% VRN 2/15/54 (a) (e)		3,587,000		3,141,733
Series 2021-B25, Class 300C, 2.994% VRN 4/15/54 (a) (e)		2,500,000		2,218,988
BGME Trust
Series 2021-VR, Class C, 2.995% VRN 1/10/43 (a) (e)		12,518,000		11,469,390
Series 2021-VR, Class D, 2.995% VRN 1/10/43 (a) (e)		2,800,000		2,509,348
BX Commercial Mortgage Trust
Series 2019-XL, Class E, 1 mo. USD LIBOR + 1.800% 2.197% FRN 10/15/36 (a)		1,469,650		1,454,103
Series 2021-SOAR, Class E, 1 mo. USD LIBOR + 1.800% 2.197% FRN 6/15/38 (a)		1,900,000		1,850,178
Series 2021-VOLT, Class E, 1 mo. USD LIBOR + 2.000% 2.397% FRN 9/15/36 (a)		4,999,000		4,809,981
Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000% 2.397% FRN 10/15/36 (a)		1,774,800		1,741,610
COLEM Mortgage Trust, Series 2022-HLNE
2.543% 4/12/42 (a)		1,600,000		1,389,281
Commercial Mortgage Pass-Through Certificates
Series 2012-CR4, Class B, 3.703% 10/15/45 (a)		1,060,000		933,531
Series 2014-UBS2, Class AM, 4.199% 3/10/47		1,375,000		1,383,138
Series 2015-CR23, Class C, 4.288% VRN 5/10/48 (e)		1,000,000		978,704
Series 2014-LC17, Class C, 4.558% VRN 10/10/47 (e)		2,908,000		2,881,932
Credit Suisse Mortgage Capital Certificates, Series 2019-ICE4, Class E, 1 mo. USD LIBOR + 2.150%
2.547% FRN 5/15/36 (a)		570,000		558,641
DROP Mortgage Trust
Series 2021-FILE, Class C, 1 mo. USD LIBOR + 2.250% 2.650% FRN 4/15/26 (a)		2,629,000		2,536,990
Series 2021-FILE, Class D, 1 mo. USD LIBOR + 2.750% 3.150% FRN 4/15/26 (a)		908,000		867,140
Extended Stay America Trust, Series 2021-ESH, Class D, 1 mo. USD LIBOR + 2.250%
2.647% FRN 7/15/38 (a)		1,987,766		1,957,981
J.P. Morgan Chase Commercial Mortgage Securities Trust, Series 2022-OPO, Class C,
3.450% VRN 1/05/39 (a) (e)		2,500,000		2,339,345
KIND Trust, Series 2021-KIND, Class C, 1 mo. USD LIBOR + 1.750%
2.147% FRN 8/15/38 (a)		2,600,000		2,564,476
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800%
2.197% FRN 5/15/36 (a)		1,505,000		1,483,455

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Life Mortgage Trust, Series 2021-BMR, Class E, 1 mo. USD LIBOR + 1.750%
2.147% FRN 3/15/38 (a)	$	1,902,047	$	1,827,199
MFT Trust
Series 2020-ABC, Class A, 3.358% 2/10/42 (a)		919,000		831,245
Series 2020-ABC, Class B, 3.477% VRN 2/10/42 (a) (e)		2,253,000		2,012,697
MHC Commercial Mortgage Trust
Series 2021-MHC, Class D, 1 mo. USD LIBOR + 1.601% 1.998% FRN 4/15/38 (a)		1,600,000		1,569,997
Series 2021-MHC, Class E, 1 mo. USD LIBOR + 2.101% 2.498% FRN 4/15/38 (a)		4,000,000		3,904,996
MKT Mortgage Trust
Series 2020-525M, Class D, 2.941% VRN 2/12/40 (a) (e)		475,000		417,475
Series 2020-525M, Class E, 2.941% VRN 2/12/40 (a) (e)		976,000		834,821
Oak Street Investment Grade Net Lease Fund, Series 2020-1A, Class A5
3.390% 11/20/50 (a)		1,200,000		1,160,781
VASA Trust, Series 2021-VASA, Class D, 1 mo. USD LIBOR + 2.100%
2.497% FRN 7/15/39 (a)		3,761,000		3,704,728
Wells Fargo Commercial Mortgage Trust, Series 2018-C45, Class B
4.556% 6/16/51		400,000		407,368
				79,583,677
Other Asset-Backed Securities — 11.7%
AASET Trust
Series 2020-1A, Class A, 3.351% 1/16/40 (a)		1,252,546		1,101,996
Series 2021-2A, Class B, 3.538% 1/15/47 (a)		1,056,553		972,972
Adams Outdoor Advertising LP, Series 2018-1, Class A
4.810% 11/15/48 (a)		1,803,867		1,826,197
Anchorage Capital CLO Ltd., Series 2021-19A, Class A, 3 mo. USD LIBOR + 1.210%
1.375% FRN 10/15/34 (a)		2,000,000		1,982,938
ASSURANT CLO Ltd., Series 2018-3A, Class CR, 3 mo. USD LIBOR + 2.050%
2.304% FRN 10/20/31 (a)		950,000		937,392
Atrium XV, Series 15A, Class B, 3 mo. USD LIBOR + 1.750%
2.009% FRN 1/23/31 (a)		1,190,000		1,184,602
Ballyrock CLO Ltd., Series 2019-2A, Class CR, 3 mo. USD LIBOR + 3.150%
3.630% FRN 11/20/30 (a)		400,000		391,957
BRE Grand Islander Timeshare Issuer LLC, Series 2017-1A, Class A
2.940% 5/25/29 (a)		303,631		300,758
Business Jet Securities LLC
Series 2021-1A, Class A, 2.162% 4/15/36 (a)		1,335,438		1,243,013
Series 2020-1A, Class A, 2.981% 11/15/35 (a)		518,186		499,408
Series 2021-1A, Class C, 5.067% 4/15/36 (a)		898,783		846,818
Canyon Capital CLO Ltd., Series 2019-2A, Class CR, 3 mo. USD LIBOR + 2.150%
2.391% FRN 10/15/34 (a)		700,000		689,275
Capital Automotive REIT
Series 2020-1A, Class A3, 3.250% 2/15/50 (a)		457,319		443,215
Series 2020-1A, Class A6, 3.810% 2/15/50 (a)		396,425		392,221
Castlelake Aircraft Securitization Trust, Series 2019-1A, Class A
3.967% 4/15/39 (a)		428,454		388,078
CBAM Ltd., Series 2018-6A, Class B1R, 3 mo. USD LIBOR + 2.100%
2.341% FRN 1/15/31 (a)		900,000		885,277
Cedar Funding IX CLO Ltd., Series 2018-9A, Class A1, 3 mo. USD LIBOR + .980%
1.234% FRN 4/20/31 (a)		750,000		745,922

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
CIFC Funding Ltd., Series 2017-5A, Class A1, 3 mo. USD LIBOR + 1.180%
1.421% FRN 11/16/30 (a)	$	2,330,000	$	2,323,024
Clear Creek CLO Ltd., Series 2015-1A, Class AR, 3 mo. USD LIBOR + 1.200%
1.454% FRN 10/20/30 (a)		2,040,000		2,032,756
Diameter Capital CLO Ltd., Series 2021-2A, Class A1, 3 mo. USD LIBOR + 1.220%
1.343% FRN 10/15/36 (a)		2,000,000		1,980,746
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		1,678,748
Series 2020-1A, Class CR, 3 mo. USD LIBOR + 2.050% 2.291% FRN 10/15/34 (a)		350,000		346,924
Elmwood CLO II Ltd., Series 2019-2A, Class AR, 3 mo. USD LIBOR + 1.150%
1.404% FRN 4/20/34 (a)		2,800,000		2,769,105
Elmwood CLO III Ltd., Series 2019-3A, Class BR, 3 mo. USD LIBOR + 1.650%
1.904% FRN 10/20/34 (a)		350,000		347,552
FCI Funding LLC, Series 2019-1A, Class A
3.630% 2/18/31 (a)		53,650		53,730
Flexential Issuer
Series 2021-1A, Class B, 3.720% 11/27/51 (a)		4,000,000		3,791,147
Series 2021-1A, Class C, 6.930% 11/27/51 (a)		4,000,000		3,759,995
Goldentree Loan Management US CLO Ltd., Series 2019-5A, Class CR, 3 mo. USD LIBOR + 2.050%
2.304% FRN 10/20/32 (a)		1,000,000		989,546
Goodgreen Trust
Series 2019-2A, Class A, 2.760% 4/15/55 (a)		2,035,358		1,942,532
Series 2016-1A, Class A, 3.230% 10/15/52 (a)		1,109,981		1,085,655
Series 2017-1A, Class A, 3.740% 10/15/52 (a)		531,714		523,018
Series 2019-1A, Class A, 3.860% 10/15/54 (a)		911,005		899,535
Gulf Stream Meridian 6 Ltd., Series 2021-6A, Class A2, 3 mo. USD LIBOR + 1.750%
1.867% FRN 1/15/37 (a)		500,000		497,641
Harbor Park CLO Ltd., Series 2018-1A, Class B1, 3 mo. USD LIBOR + 1.700%
1.954% FRN 1/20/31 (a)		1,290,000		1,280,936
Hero Funding Trust
Series 2016-3A, Class A1, 3.080% 9/20/42 (a)		495,787		489,502
Series 2017-3A, Class A1, 3.190% 9/20/48 (a)		548,677		539,950
Series 2017-2A, Class A1, 3.280% 9/20/48 (a)		159,313		157,177
Series 2016-4A, Class A1, 3.570% 9/20/47 (a)		637,015		631,676
Series 2017-2A, Class A2, 4.070% 9/20/48 (a)		128,075		127,785
Series 2018-1A, Class A2, 4.670% 9/20/48 (a)		963,192		973,189
Horizon Aircraft Finance I Ltd., Series 2018-1, Class A
4.458% 12/15/38 (a)		850,676		783,283
Horizon Aircraft Finance II Ltd, Series 2019-1, Class A
3.721% 7/15/39 (a)		1,212,145		1,081,214
Horizon Aircraft Finance III Ltd., Series 2019-2, Class A
3.425% 11/15/39 (a)		2,686,482		2,476,567
KKR CLO Ltd.
Series 28A, Class A, 3 mo. USD LIBOR + 1.140% 1.966% FRN 3/15/31 (a)		900,000		894,459
Series 36A, Class C, 3 mo. USD LIBOR + 2.150% 2.265% FRN 10/15/34 (a)		500,000		491,298
KREF Ltd.

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2021-FL2, Class B, 1 mo. USD LIBOR + 1.650% 2.091% FRN 2/15/39 (a)	$	2,900,000	$	2,870,917
Series 2021-FL2, Class C, 1 mo. USD LIBOR + 2.000% 2.441% FRN 2/15/39 (a)		5,000,000		4,948,519
Series 2021-FL2, Class D, 1 mo. USD LIBOR + 2.200% 2.641% FRN 2/15/39 (a)		4,100,000		4,056,559
Labrador Aviation Finance Ltd., Series 2016-1A, Class A1
4.300% 1/15/42 (a)		1,972,781		1,806,121
MACH 1 Cayman Ltd., Series 2019-1, Class A
3.474% 10/15/39 (a)		1,556,635		1,444,798
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		1,648,928
Series 2018-32A, Class CR, 3 mo. USD LIBOR + 2.000% 2.259% FRN 1/22/31 (a)		1,000,000		986,257
Series 2018-29A, Class C, 3 mo. USD LIBOR + 2.200% 2.441% FRN 10/18/30 (a)		620,000		615,651
Mariner Finance Issuance Trust
Series 2021-AA, Class B, 2.330% 3/20/36 (a)		1,336,000		1,249,006
Series 2021-AA, Class C, 2.960% 3/20/36 (a)		637,000		573,654
Mosaic Solar Loans LLC
Series 2018-1A, Class A, 4.010% 6/22/43 (a)		198,478		197,183
Series 2017-1A, Class A, 4.450% 6/20/42 (a)		193,553		193,962
Neuberger Berman CLO Ltd., Series 2015-20A, Class BRR, 3 mo. USD LIBOR + 1.650%
1.891% FRN 7/15/34 (a)		1,800,000		1,793,938
NP SPE LLC, Series 2017-1A, Class A2
4.219% 10/21/47 (a)		2,260,000		2,232,105
OCP CLO Ltd., Series 2018-15A, Class A1, 3 mo. USD LIBOR + 1.100%
1.354% FRN 7/20/31 (a)		250,000		248,672
Oxford Finance Funding Trust, Series 2020-1A, Class A2
3.101% 2/15/28 (a)		1,469,316		1,465,996
Parallel Ltd., Series 2021-2A, Class A2, 3 mo. USD LIBOR + 1.850%
1.969% FRN 10/20/34 (a)		450,000		440,333
Pioneer Aircraft Finance Ltd., Series 2019-1, Class A
3.967% 6/15/44 (a)		1,396,474		1,292,886
Planet Fitness Master Issuer LLC, Series 2019-1A, Class A2
3.858% 12/05/49 (a)		2,269,755		2,134,716
Rad CLO 12 Ltd., Series 2021-12A, Class A, 3 mo. USD LIBOR + 1.170%
1.311% FRN 10/30/34 (a)		1,000,000		990,181
Rockford Tower CLO Ltd., Series 2019-1A, Class B1R, 3 mo. USD LIBOR + 1.550%
1.804% FRN 4/20/34 (a)		1,500,000		1,481,730
RR 3 Ltd., Series 2018-3A, Class A1R2, 3 mo. USD LIBOR + 1.090%
1.331% FRN 1/15/30 (a)		2,450,000		2,437,341
Sierra Receivables Funding LLC
Series 2021-1A, Class D, 3.170% 11/20/37 (a)		920,917		895,597
Series 2018-3A, Class D, 5.200% 9/20/35 (a)		382,014		384,613
Steele Creek CLO Ltd., Series 2018-2A, Class C, 3 mo. USD LIBOR + 2.300%
2.788% FRN 8/18/31 (a)		1,170,000		1,135,205
Structured Asset Securities Corp. Mortgage Loan Trust, Series 2006-GEL1, Class M2, 1 mo. USD LIBOR + 1.200%
1.657% FRN 11/25/35 (a)		1,701,023		1,665,762
Structured Receivables Finance LLC, Series 2010-B, Class A
3.730% 8/15/36 (a)		93,279		93,084
Sunnova Helios II Issuer LLC, Series 2018-1A, Class A
4.870% 7/20/48 (a)		409,461		409,545

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
SuttonPark Structured Settlements LLC, Series 2017-1A, Class A
4.190% 1/15/71 (a)	$	1,832,360	$	1,875,925
Thrust Engine Leasing
Series 2021-1A, Class A, 4.163% 7/15/40 (a)		2,645,704		2,474,678
Series 2021-1A, Class B, 6.121% 7/15/40 (a)		1,264,059		1,171,829
Series 2021-1A, Class C, 7.386% 7/15/40 (a)		959,181		894,457
TICP CLO XIV Ltd., Series 2019-14A, Class A2R, 3 mo. USD LIBOR + 1.650%
FRN 10/20/32 (a)		1,000,000		990,106
Vivint Solar Financing V LLC, Series 2018-1A, Class B
7.370% 4/30/48 (a)		2,284,611		2,294,240
WAVE LLC
Series 2019-1A, Class A, 3.597% 9/15/44 (a)		3,503,031		3,091,211
Series 2017-1A, Class A, 3.844% 11/15/42 (a)		357,898		337,376
Series 2017-1A, Class C, 6.656% 11/15/42 (a)		2,036,365		1,067,891
Willis Engine Structured Trust IV, Series 2018-A, Class A,
4.750% STEP 9/15/43 (a)		1,050,909		971,799
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		1,142,392
Series 2016-2A, Class BR, 3 mo. USD LIBOR + 1.800% 2.117% FRN 11/01/31 (a)		900,000		896,539
Zaxby's Funding LLC, Series 2021-1A, Class A2
3.238% 7/30/51 (a)		870,625		805,766
				107,488,197
Student Loans Asset-Backed Securities — 2.9%
College Avenue Student Loans LLC
Series 2019-A, Class B, 3.810% 12/28/48 (a)		1,593,620		1,555,462
Series 2019-A, Class C, 4.460% 12/28/48 (a)		1,062,683		1,043,565
College Loan Corp. Trust I, Series 2007-1, Class B2,
FRN 1/25/47 (e)		252,727		208,668
EdLinc Student Loan Funding, Series 2017-A, Class A, PRIME - 1.150%
2.100% FRN 12/01/47 (a)		955,511		944,199
Education Services of America
Series 2014-4, Class B, 1 mo. USD LIBOR + 1.500% 1.957% FRN 6/25/48 (a)		1,200,000		1,190,022
Series 2015-1, Class B, 1 mo. USD LIBOR + 1.500% 1.957% FRN 10/25/56 (a)		1,100,000		1,093,607
Educational Funding of the South, Inc., Series 2011-1, Class B, 3 mo. USD LIBOR + 3.700%
3.958% FRN 4/25/46		625,000		664,168
EDvestinU Private Education Loan Issue No 1 LLC, Series 2019-A, Class A
3.580% 11/25/38 (a)		793,376		791,339
Higher Education Funding I
Series 2004-1, Class B2, 0.000% FRN 1/01/44 (a) (e)		450,000		391,962
Series 2004-1, Class B1, 0.000% FRN 1/01/44 (a) (e)		450,000		403,783
Laurel Road Prime Student Loan Trust, Series 2017-B, Class BFX
3.020% 8/25/42 (a)		547,785		544,086
Navient Student Loan Trust
Series 2021-2A, Class B, 1 mo. USD LIBOR + 1.350% 1.807% FRN 2/25/70 (a)		2,330,000		2,295,287
Series 2015-3, Class B, 1 mo. USD LIBOR + 1.500% 1.957% FRN 10/25/58		940,000		929,539
Series 2016-2, Class A3, 1 mo. USD LIBOR + 1.500% 1.957% FRN 6/25/65 (a)		2,370,000		2,390,940
Nelnet Student Loan Trust
Series 2005-4, Class A4A, 0.000% FRN 3/22/32 (e)		225,000		222,064

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2006-3, Class B, 3 mo. USD LIBOR + .250% 1.216% FRN 6/25/41	$	477,098	$	438,617
Series 2019-1A, Class B, 1 mo. USD LIBOR + 1.400% 1.857% FRN 4/25/67 (a)		3,250,000		3,249,998
Series 2019-5, Class B, 3.450% 10/25/67 (a)		2,150,000		2,000,922
SLM Student Loan Trust
Series 2006-5, Class B, 3 mo. USD LIBOR + .210% 0.468% FRN 10/25/40		1,667,068		1,555,765
Series 2005-6, Class B, 3 mo. USD LIBOR + .290% 0.548% FRN 1/25/44		1,593,934		1,500,847
SoFi Alternative Trust, Series 2019-C, Class PT,
3.997% VRN 1/25/45 (a) (e)		2,333,237		2,403,983
SoFi Professional Loan Program LLC, Series 2017-C, Class C,
4.210% VRN 7/25/40 (a) (e)		990,000		948,299
				26,767,122
Whole Loan Collateral Collateralized Mortgage Obligations — 2.9%
Bank of America Mortgage Securities, Series 2004-G, Class 2A7,
2.507% VRN 8/25/34 (e)		10,232		9,996
CSMC, Series 2021-NQM3, Class M1,
2.317% VRN 4/25/66 (a) (e)		1,330,000		1,212,959
Flagstar Mortgage Trust, Series 2021-6INV, Class A18,
2.500% VRN 8/25/51 (a) (e)		4,084,674		3,738,913
GS Mortgage-Backed Securities Trust
Series 2021-GR2, Class A2, 2.500% VRN 2/25/52 (a) (e)		2,250,589		2,086,412
Series 2021-GR2, Class A4, 2.500% VRN 2/25/52 (a) (e)		1,494,766		1,371,039
JP Morgan Mortgage Trust, Series 2017-1, Class A11,
3.460% VRN 1/25/47 (a) (e)		608,668		601,183
New Residential Mortgage Loan Trust, Series 2021-INV1, Class A4,
2.500% VRN 6/25/51 (a) (e)		2,657,219		2,440,594
NewRez Warehouse Securitization Trust, Series 2021-1, Class D, 1 mo. USD LIBOR + 1.400%
1.857% FRN 5/25/55 (a)		2,606,000		2,605,630
NMLT Trust, Series 2021-INV1, Class M1,
2.711% VRN 5/25/56 (a) (e)		5,400,000		4,793,816
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850%
3.307% FRN 2/25/23 (a)		1,270,000		1,264,523
Starwood Mortgage Residential Trust, Series 2021-3, Class M1,
2.491% VRN 6/25/56 (a) (e)		2,448,000		2,239,158
Verus Securitization Trust
Series 2021-3, Class M1, 2.397% VRN 6/25/66 (a) (e)		3,640,000		3,312,056
Series 2021-R3, Class M1, 2.411% VRN 4/25/64 (a) (e)		1,147,000		1,083,859
Wells Fargo Mortgage Backed Securities Trust, Series 2019-1, Class A1,
3.980% VRN 11/25/48 (a) (e)		91,847		91,960
				26,852,098
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $255,110,614)				244,803,205
SOVEREIGN DEBT OBLIGATIONS — 1.0%
Colombia Government International Bond
6.125% 1/18/41		2,080,000		2,021,115
Mexico Government International Bond
3.500% 2/12/34		1,965,000		1,826,074
4.500% 4/22/29		875,000		922,329
4.750% 3/08/44		3,727,000		3,670,424

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
6.750% 9/27/34	$	685,000	$	841,180
				9,281,122
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $9,669,863)				9,281,122
U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (f) — 23.6%
Collateralized Mortgage Obligations — 0.0%
Federal Home Loan Mortgage Corp. Series 2178, Class PB 7.000% 8/15/29		20,202		21,635
Pass-Through Securities — 23.6%
Federal Home Loan Mortgage Corp.
Pool #RA4245 2.000% 12/01/50		2,346,747		2,187,810
Pool #RA4255 2.000% 1/01/51		4,881,044		4,556,569
Pool #SD0905 3.000% 3/01/52 (d)		3,729,807		3,668,516
Pool #J13972 3.500% 1/01/26		12,848		13,138
Pool #C91344 3.500% 11/01/30		50,999		51,847
Pool #C91424 3.500% 1/01/32		28,890		29,443
Pool #RA2483 3.500% 6/01/50		4,758,165		4,780,130
Pool #C91239 4.500% 3/01/29		2,563		2,678
Pool #C91251 4.500% 6/01/29		16,542		17,283
Pool #C90939 5.500% 12/01/25		8,484		9,024
Pool #D97258 5.500% 4/01/27		4,803		5,113
Pool #C91026 5.500% 4/01/27		16,126		17,184
Pool #C91074 5.500% 8/01/27		1,674		1,784
Pool #D97417 5.500% 10/01/27		7,734		8,241
Pool #C91128 5.500% 12/01/27		987		1,052
Pool #C91148 5.500% 1/01/28		37,361		39,811
Pool #C91176 5.500% 5/01/28		14,197		15,137
Pool #C91217 5.500% 11/01/28		4,687		4,997
Federal National Mortgage Association Pool #FS1075 3.000% 3/01/52 (d)		3,750,000		3,690,721
Federal National Mortgage Association
Pool #775539 12 mo. USD LIBOR + 1.641% 1.891% FRN 5/01/34		12,345		12,743
Pool #FM8596 2.500% 9/01/51		2,259,852		2,164,592
Pool #FM9104 2.500% 10/01/51		6,416,165		6,143,196
Pool #FM9227 2.500% 10/01/51		4,853,779		4,644,246
Pool #MA3029 3.000% 6/01/32		1,437,282		1,453,964
Pool #MA3090 3.000% 8/01/32		580,775		587,516
Pool #AO8180 3.000% 9/01/42		10,859		10,844
Pool #AB7397 3.000% 12/01/42		73,704		73,604
Pool #AB7401 3.000% 12/01/42		58,819		58,739
Pool #AP8668 3.000% 12/01/42		87,398		87,279
Pool #AR1975 3.000% 12/01/42		17,314		17,290
Pool #AR0306 3.000% 1/01/43		5,870		5,862
Pool #AR5391 3.000% 1/01/43		32,612		32,568
Pool #AL3215 3.000% 2/01/43		57,576		57,498
Pool #AR4109 3.000% 2/01/43		62,869		62,784
Pool #AR4432 3.000% 3/01/43		27,119		27,082
Pool #AT0169 3.000% 3/01/43		138,309		138,122
Pool #AB8809 3.000% 3/01/43		30,939		30,897
Pool #MA1368 3.000% 3/01/43		116,237		116,079
Pool #AR2174 3.000% 4/01/43		110,761		110,611
Pool #AS1304 3.500% 12/01/28		560,827		573,222
Pool #MA1356 3.500% 2/01/43		4,430,784		4,535,699
Pool #CA6096 3.500% 6/01/50		4,768,642		4,792,146

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #FM4017 3.500% 8/01/50	$	328,968	$	330,384
Pool #AA3980 4.500% 4/01/28		32,627		33,983
Pool #CA1909 4.500% 6/01/48		2,390,061		2,492,906
Pool #AD6437 5.000% 6/01/40		221,948		238,915
Pool #AD6996 5.000% 7/01/40		1,419,619		1,524,472
Pool #AL8173 5.000% 2/01/44		485,371		527,176
Pool #AD0836 5.500% 11/01/28		29,988		31,931
Government National Mortgage Association
Pool #MA6409 3.000% 1/20/50		4,703,440		4,672,653
Pool #371146 7.000% 9/15/23		3		3
Pool #352022 7.000% 11/15/23		914		941
Pool #374440 7.000% 11/15/23		78		80
Pool #491089 7.000% 12/15/28		4,391		4,610
Pool #480539 7.000% 4/15/29		84		90
Pool #500928 7.000% 5/15/29		2,661		2,891
Pool #488634 7.000% 5/15/29		1,620		1,749
Pool #499410 7.000% 7/15/29		964		1,049
Pool #510083 7.000% 7/15/29		300		324
Pool #493723 7.000% 8/15/29		1,963		2,139
Pool #581417 7.000% 7/15/32		3,736		4,034
Government National Mortgage Association II
Pool #008746 1 year CMT + 1.500% 1.750% FRN 11/20/25		1,365		1,365
Pool #080136 1 year CMT + 1.500% 1.750% FRN 11/20/27		394		396
Pool #MA6038 3.000% 7/20/49		2,612,471		2,603,330
Pool #MA6283 3.000% 11/20/49		4,591,989		4,566,236
Pool #MA4321 3.500% 3/20/47		2,837,104		2,894,199
Government National Mortgage Association II TBA 3.000% 11/01/51 (d)		17,700,000		17,505,024
Government National Mortgage Association TBA 3.500% 1/01/52 (d)		14,620,000		14,713,659
Uniform Mortgage Backed Securities TBA
2.000% 12/01/51 (d)		8,925,000		8,273,405
2.500% 1/01/52 (d)		18,700,000		17,819,054
3.000% 2/01/52 (d)		47,900,000		46,893,353
3.500% 3/01/52 (d)		24,875,000		24,841,964
4.000% 2/01/49 (d)		21,225,000		21,588,147
				216,407,523
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $221,176,584)				216,429,158
U.S. TREASURY OBLIGATIONS — 11.0%
U.S. Treasury Bonds & Notes — 11.0%
U.S. Treasury Bond
2.250% 8/15/49 (g)		28,450,000		27,079,535
3.500% 2/15/39		14,700,000		16,832,620
U.S. Treasury Note
0.500% 2/28/26		61,350,000		56,789,683
				100,701,838
TOTAL U.S. TREASURY OBLIGATIONS (Cost $107,131,520)				100,701,838
TOTAL BONDS & NOTES (Cost $947,896,159)				909,804,040

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
TOTAL PURCHASED OPTIONS (#) — 0.3% (Cost $2,989,579)			$	3,116,111
MUTUAL FUNDS — 0.2%
Diversified Financial Services — 0.2%
State Street Navigator Securities Lending Government Money Market Portfolio (h)
		2,279,145		2,279,145
TOTAL MUTUAL FUNDS (Cost $2,279,145)				2,279,145
TOTAL LONG-TERM INVESTMENTS (Cost $953,164,883)				915,199,296
	Principal Amount
SHORT-TERM INVESTMENTS — 18.0%
Commercial Paper — 17.0%
Boston Scientific Corp.
0.659% 4/07/22	$	12,000,000		11,998,670
Enterprise Products Operating LLC
0.923% 4/11/22 (a)		12,000,000		11,997,672
Fortive Corp.
0.893% 4/06/22 (a)		9,000,000		8,999,156
0.933% 4/05/22 (a)		3,000,000		2,999,768
Ingredion, Inc.
0.913% 4/11/22 (a)		6,000,000		5,998,863
0.964% 4/08/22 (a)		6,000,000		5,999,253
Mccormick & Co, Inc.
0.608% 4/06/22 (a)		5,000,000		4,999,531
MUFG Bank Ltd.
0.294% 4/07/22		12,000,000		11,999,300
National Grid USA
0.761% 4/06/22 (a)		13,000,000		12,998,780
National Rural Utilities Cooperative Finance Corp.
0.467% 4/25/22		12,000,000		11,996,742
NRW Bank
0.264% 4/07/22 (a)		12,000,000		11,999,323
Oge Energy Corp.
1.065% 4/12/22 (a)		7,000,000		6,998,481
Ryder System, Inc.
0.862% 4/06/22		10,000,000		9,999,062
Sherwin Williams Co.
0.822% 4/19/22 (a)		10,000,000		9,997,414
Southern Co. Gas Capital Corp.
0.761% 4/04/22 (a)		5,000,000		4,999,673
Tampa Electric Co.
0.609% 4/01/22 (a)		3,000,000		2,999,975
Walgreens Boots Alliance, Inc.
1.066% 5/13/22 (a)		2,000,000		1,997,422
Waste Management, Inc.
0.558% 4/11/22 (a)		7,000,000		6,998,674

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Xcel Energy, Inc.
0.913% 4/11/22 (a)	$	10,000,000	$	9,998,060
				155,975,819
Repurchase Agreement — 1.0%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/22, 0.000%, due 4/01/22 (i)		8,812,056		8,812,056
TOTAL SHORT-TERM INVESTMENTS (Cost $164,783,349)				164,787,875
TOTAL INVESTMENTS — 117.6% (Cost $1,117,948,232) (j)				1,079,987,171
Other Assets/(Liabilities) — (17.6)%				(161,393,374)
NET ASSETS — 100.0%			$	918,593,797

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, 2022, the aggregate market value of these securities amounted to $444,446,984 or 48.38% of net assets.

(b) Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2022, was $4,703,916 or 0.51% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $2,532,386 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 perpetual and has no stated maturity date.

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

(e) 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, 2022.

(f) May contain securities that are issued by a U.S. Government Agency, but are unsecured and are not guaranteed by a U.S. Government Agency.

(g) All or a portion of this security is pledged/held as collateral for open derivatives.

(h) Represents investment of security lending cash collateral. (Note 2).

(i) Maturity value of $8,812,056. Collateralized by U.S. Government Agency obligations with a rate of 0.500%, maturity date of 4/15/24, and an aggregate market value, including accrued interest, of $8,988,381.

(j) 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

$

257,816

$

184,971

$

72,845

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

$

2,858,295

$

2,804,608

$

53,687

$

3,116,111

$

2,989,579

$

126,532

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Long Bond	6/21/22		114	$	17,503,039	$	(395,914)
U.S. Treasury Ultra Bond	6/21/22		178		32,734,764		(1,206,514)
U.S. Treasury Note 2 Year	6/30/22		329		70,692,319		(970,022)
U.S. Treasury Note 5 Year	6/30/22		173		20,289,714		(448,776)
						$	(3,021,226)
Short
U.S. Treasury Ultra 10 Year	6/21/22		99	$	(13,722,056)	$	310,650

## Exercise Rate.

Currency Legend

USD U.S. Dollar

MML Short-Duration Bond Fund —  Portfolio of Investments

March 31, 2022 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 92.4%
CORPORATE DEBT — 50.2%
Aerospace & Defense — 0.2%
The Boeing Co.
2.196% 2/04/26	$	425,000	$	402,257
Agriculture — 1.7%
BAT Capital Corp.
4.700% 4/02/27		1,185,000		1,217,101
Imperial Brands Finance PLC
3.125% 7/26/24 (a)		400,000		396,610
3.500% 2/11/23 (a)		387,000		389,568
Wens Foodstuffs Group Co. Ltd.
2.349% 10/29/25 (a)		900,000		720,534
				2,723,813
Airlines — 0.6%
Delta Air Lines, Inc./SkyMiles IP Ltd.
4.500% 10/20/25 (a)		1,000,000		1,006,614
Auto Manufacturers — 3.1%
Ford Motor Credit Co. LLC
3 mo. USD LIBOR + 1.235% 1.741% FRN 2/15/23		275,000		272,876
2.300% 2/10/25		645,000		612,245
3.087% 1/09/23		260,000		260,078
3.350% 11/01/22		1,050,000		1,052,415
General Motors Co.
6.125% 10/01/25		605,000		650,263
Harley-Davidson Financial Services, Inc.
3.350% 6/08/25 (a)		449,000		441,889
Hyundai Capital America
1.500% 6/15/26 (a)		850,000		773,819

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

	Principal Amount		Value
Nissan Motor Acceptance Co. LLC
1.850% 9/16/26 (a)	$	885,000	$	793,506
				4,857,091
Auto Parts & Equipment — 0.3%
Metalsa S A P I De Cv
4.900% 4/24/23 (a)		450,000		453,938
Banks — 10.5%
ABN AMRO Bank NV
4.750% 7/28/25 (a)		825,000		843,356
Arab National Bank 5 year CMT + 2.974%
3.326% VRN 10/28/30 (a)		650,000		633,750
Banco Santander SA
1.849% 3/25/26		600,000		561,490
Bank of America Corp.
SOFR + .960% 1.734% VRN 7/22/27		265,000		246,431
3.950% 4/21/25		178,000		181,192
4.000% 1/22/25		647,000		659,526
The Bank of Nova Scotia
4.500% 12/16/25		829,000		857,532
Barclays PLC
5.200% 5/12/26		1,055,000		1,096,947
BPCE SA
4.625% 7/11/24 (a)		200,000		203,795
5.700% 10/22/23 (a)		1,085,000		1,122,974
Citigroup, Inc.
4.400% 6/10/25		855,000		880,555
4.450% 9/29/27		465,000		480,379
Credit Suisse AG
6.500% 8/08/23 (a)		930,000		953,250
Danske Bank A/S 1 year CMT + .730%
1.549% VRN 9/10/27 (a)		485,000		442,243
Deutsche Bank AG
SOFR + 2.159% 2.222% VRN 9/18/24		435,000		425,710
SOFR + 1.219% 2.311% VRN 11/16/27		430,000		394,614
SOFR + 1.318% 2.552% VRN 1/07/28		425,000		392,261
The Goldman Sachs Group, Inc.
4.250% 10/21/25		1,160,000		1,189,646
HSBC Holdings PLC
SOFR + 1.430% 2.999% VRN 3/10/26		430,000		422,056
4.250% 3/14/24		210,000		213,221

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

	Principal Amount		Value
4.250% 8/18/25	$	483,000	$	489,144
4.375% 11/23/26		73,000		74,444
JP Morgan Chase & Co. SOFR + .765%
1.470% VRN 9/22/27 (b)		445,000		410,669
Macquarie Group Ltd. SOFR + 1.069%
1.340% VRN 1/12/27 (a)		525,000		479,703
Morgan Stanley
4.350% 9/08/26		1,150,000		1,189,026
Natwest Group PLC 1 year CMT + .900%
1.642% VRN 6/14/27		345,000		315,817
Santander UK Group Holdings PLC SOFR + 1.220%
2.469% VRN 1/11/28		370,000		344,620
Societe Generale SA
1 year CMT + 1.100% 1.488% VRN 12/14/26 (a)		525,000		475,270
1 year CMT + 1.300% 2.797% VRN 1/19/28 (a)		200,000		187,450
Wells Fargo & Co.
4.100% 6/03/26		405,000		416,521
				16,583,592
Beverages — 0.5%
Bacardi Ltd.
4.450% 5/15/25 (a)		378,000		387,293
JDE Peet's NV
1.375% 1/15/27 (a)		457,000		410,855
				798,148
Biotechnology — 0.2%
Bio-Rad Laboratories, Inc.
3.300% 3/15/27		260,000		256,192
Chemicals — 1.0%
Celanese US Holdings LLC
1.400% 8/05/26		250,000		225,453
MEGlobal Canada ULC
5.000% 5/18/25 (a)		450,000		463,891
Syngenta Finance NV
4.441% 4/24/23 (a)		183,000		185,447
4.892% 4/24/25 (a)		335,000		341,364

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

	Principal Amount		Value
Yara International ASA
3.800% 6/06/26 (a)	$	325,000	$	324,900
				1,541,055
Commercial Services — 0.7%
Element Fleet Management Corp.
1.600% 4/06/24 (a)		240,000		231,628
Triton Container International Ltd.
2.050% 4/15/26 (a)		950,000		887,000
				1,118,628
Computers — 0.3%
Dell International LLC/EMC Corp.
5.850% 7/15/25		432,000		461,175
Distribution & Wholesale — 0.8%
Li & Fung Ltd.
4.500% 8/18/25 (a)		1,350,000		1,289,365
Diversified Financial Services — 3.5%
AerCap Ireland Capital DAC / AerCap Global Aviation Trust
2.450% 10/29/26		555,000		513,226
6.500% 7/15/25		300,000		318,008
Aircastle Ltd.
4.125% 5/01/24		740,000		739,334
Antares Holdings LP
2.750% 1/15/27 (a)		310,000		272,845
3.950% 7/15/26 (a)		605,000		564,660
6.000% 8/15/23 (a)		323,000		329,884
Avolon Holdings Funding Ltd.
2.875% 2/15/25 (a)		1,000,000		961,196
4.250% 4/15/26 (a)		250,000		246,834
BGC Partners, Inc.
4.375% 12/15/25		505,000		509,023
LeasePlan Corp. NV
2.875% 10/24/24 (a)		280,000		273,768
SPARC EM SPC Panama Metro Line 2 SP
0.000% 12/05/22 (a)		86,196		84,990
Synchrony Financial
3.950% 12/01/27		800,000		793,599
				5,607,367

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

	Principal Amount		Value
Electric — 1.3%
Alliant Energy Finance LLC
1.400% 3/15/26 (a)	$	260,000	$	236,724
American Electric Power Co., Inc.
2.031% 3/15/24		305,000		299,934
Enel Finance International NV
1.375% 7/12/26 (a)		620,000		569,500
Pacific Gas and Electric Co.
1.750% 6/16/22		970,000		968,607
				2,074,765
Energy – Alternate Sources — 0.4%
Contemporary Ruiding Development Ltd.
1.500% 9/09/26 (a)		682,000		614,346
Entertainment — 0.3%
Magallanes, Inc.
3.638% 3/15/25 (a)		475,000		477,963
Food — 0.9%
JBS Finance Luxembourg SARL
2.500% 1/15/27 (a)		860,000		798,734
Smithfield Foods, Inc.
4.250% 2/01/27 (a)		575,000		581,980
				1,380,714
Health Care – Services — 0.8%
HCA, Inc.
5.375% 2/01/25		1,170,000		1,218,321
Insurance — 3.6%
AmTrust Financial Services, Inc.
6.125% 8/15/23		620,000		621,495
Athene Global Funding
1.730% 10/02/26 (a)		445,000		404,633
2.500% 1/14/25 (a)		420,000		408,053
Brighthouse Financial Global Funding
1.550% 5/24/26 (a)		484,000		447,814
CNO Financial Group, Inc.
5.250% 5/30/25		530,000		550,400
CNO Global Funding
1.750% 10/07/26 (a)		714,000		659,188

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

	Principal Amount		Value
Corebridge Financial, Inc.
3.650% 4/05/27 (c)	$	235,000	$	234,671
GA Global Funding Trust
2.250% 1/06/27 (a)		685,000		640,381
Jackson Financial, Inc.
1.125% 11/22/23 (a) (b)		245,000		237,769
Sammons Financial Group, Inc.
4.450% 5/12/27 (a)		780,000		802,758
Unum Group
3.875% 11/05/25		620,000		625,284
				5,632,446
Internet — 1.2%
Expedia Group, Inc.
4.625% 8/01/27		189,000		196,339
Netflix, Inc.
5.875% 11/15/28		430,000		473,989
Prosus NV
3.257% 1/19/27 (a)		850,000		777,634
Weibo Corp.
3.500% 7/05/24		450,000		439,636
				1,887,598
Investment Companies — 2.4%
Ares Capital Corp.
3.875% 1/15/26		535,000		525,420
BlackRock TCP Capital Corp.
3.900% 8/23/24		236,000		234,997
Blackstone Private Credit Fund
2.625% 12/15/26 (a)		890,000		802,101
2.700% 1/15/25 (a)		325,000		310,687
Golub Capital BDC, Inc.
2.500% 8/24/26		270,000		248,373
3.375% 4/15/24		330,000		325,101
Icahn Enterprises LP/ Icahn Enterprises Finance Corp.
4.750% 9/15/24		445,000		446,113
OWL Rock Core, Income Corp.
4.700% 2/08/27 (a)		500,000		481,561

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

	Principal Amount		Value
Sixth Street Specialty Lending, Inc.
3.875% 11/01/24	$	410,000	$	408,975
				3,783,328
Iron & Steel — 0.7%
Vale Overseas Ltd.
6.250% 8/10/26		1,030,000		1,134,493
Leisure Time — 0.2%
Harley-Davidson, Inc.
3.500% 7/28/25		255,000		250,935
Lodging — 0.7%
Hyatt Hotels Corp.
1.800% 10/01/24		342,000		329,354
Las Vegas Sands Corp.
3.200% 8/08/24		875,000		836,060
				1,165,414
Machinery – Construction & Mining — 0.5%
The Weir Group PLC
2.200% 5/13/26 (a)		880,000		822,895
Media — 0.4%
Cable Onda SA
4.500% 1/30/30 (a)		630,000		614,565
Mining — 1.0%
Alcoa Nederland Holding BV
6.125% 5/15/28 (a)		395,000		413,763
Freeport-McMoRan, Inc.
4.550% 11/14/24		370,000		381,366
Glencore Funding LLC
1.625% 4/27/26 (a)		470,000		434,019
4.125% 5/30/23 (a)		360,000		365,731
				1,594,879
Multi-National — 0.6%
Africa Finance Corp.
3.125% 6/16/25 (a)		957,000		927,811

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

	Principal Amount		Value
Oil & Gas — 1.9%
EQT Corp.
6.625% STEP 2/01/25	$	644,000	$	680,257
Occidental Petroleum Corp.
5.500% 12/01/25		735,000		773,441
Ovintiv Exploration, Inc.
5.375% 1/01/26		275,000		291,792
Petroleos Mexicanos
4.625% 9/21/23		1,215,000		1,229,446
				2,974,936
Packaging & Containers — 0.4%
Berry Global, Inc.
1.650% 1/15/27		670,000		611,025
Pharmaceuticals — 0.7%
Bayer US Finance II LLC
4.250% 12/15/25 (a)		400,000		407,233
Viatris, Inc.
2.300% 6/22/27		865,000		788,519
				1,195,752
Pipelines — 2.1%
Energy Transfer LP
4.200% 9/15/23		299,000		303,092
4.950% 6/15/28		750,000		786,500
EnLink Midstream Partners LP
4.400% 4/01/24		900,000		911,751
EQM Midstream Partners LP
4.750% 7/15/23		505,000		508,787
Plains All American Pipeline LP / PAA Finance Corp.
4.500% 12/15/26		90,000		92,449
4.650% 10/15/25		760,000		781,760
				3,384,339
Private Equity — 0.5%
Hercules Capital, Inc.
2.625% 9/16/26		560,000		515,000

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

	Principal Amount		Value
3.375% 1/20/27	$	270,000	$	253,833
				768,833
Real Estate — 1.4%
Country Garden Holdings Co. Ltd.
4.750% 1/17/23 (a)		250,000		230,000
8.000% 1/27/24 (a)		1,351,000		1,156,726
MAF Sukuk Ltd.
4.500% 11/03/25 (a)		625,000		642,256
Shimao Group Holdings Ltd.
6.125% 2/21/24 (a)		400,000		120,200
				2,149,182
Real Estate Investment Trusts (REITS) — 1.5%
Global Net Lease, Inc./Global Net Lease Operating Partnership LP
3.750% 12/15/27 (a)		275,000		253,866
Omega Healthcare Investors, Inc.
4.750% 1/15/28		609,000		619,982
SBA Tower Trust
1.884% 1/15/26 (a)		287,000		271,058
Service Properties Trust
4.350% 10/01/24		935,000		901,433
Vornado Realty LP
2.150% 6/01/26		310,000		290,101
				2,336,440
Retail — 0.6%
Nordstrom, Inc.
2.300% 4/08/24		268,000		264,227
4.000% 3/15/27 (b)		86,000		82,839
QVC, Inc.
4.375% 3/15/23		590,000		592,012
				939,078
Telecommunications — 1.8%
Ericsson LM
4.125% 5/15/22		628,000		628,000
Sprint Communications, Inc.
9.250% 4/15/22		330,000		330,413

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

	Principal Amount		Value
Telecom Italia SpA
5.303% 5/30/24 (a)	$	430,000	$	436,428
Tower Bersama Infrastructure Tbk PT
4.250% 1/21/25 (a)		1,445,000		1,469,866
				2,864,707
Toys, Games & Hobbies — 0.6%
Mattel, Inc.
3.375% 4/01/26 (a)		900,000		881,177
Trucking & Leasing — 0.3%
Penske Truck Leasing Co. LP/PTL Finance Corp.
1.700% 6/15/26 (a)		585,000		543,520
TOTAL CORPORATE DEBT (Cost $83,823,946)				79,328,697
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 40.5%
Automobile Asset-Backed Securities — 2.7%
Avis Budget Rental Car Funding AESOP LLC
Series 2019-3A, Class C, 3.150% 3/20/26 (a)		1,083,000		1,045,304
Series 2018-1A, Class C, 4.730% 9/20/24 (a)		500,000		504,277
Canadian Pacer Auto Receivables Trust, Series 2018-2A, Class B
3.630% 1/19/24 (a)		180,000		180,159
Carmax Auto Owner Trust, Series 2021-4, Class D
1.480% 3/15/28		250,000		232,898
Carvana Auto Receivables Trust
Series 2021-N1, Class D, 1.500% 1/10/28		1,243,000		1,224,390
Series 2021-P3, Class D, 2.250% 9/11/28		855,000		784,282
Santander Revolving Auto Loan Trust, Series 2019-A, Class D
3.450% 1/26/32 (a)		215,000		212,477
				4,183,787
Commercial Mortgage-Backed Securities — 5.9%
BAMLL Commercial Mortgage Securities Trust
Series 2018-DSNY, Class C, 1 mo. USD LIBOR + 1.350% 1.747% FRN 9/15/34 (a)		130,000		127,076
Series 2019-BPR, Class CMP, 3.895% VRN 11/05/32 (a) (d)		370,000		349,229
Series 2019-BPR, Class DMP, 3.895% VRN 11/05/32 (a) (d)		450,000		422,108
BHMS Mortgage Trust, Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500%
1.897% FRN 7/15/35 (a)		500,000		491,251

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

	Principal Amount		Value
BX Commercial Mortgage Trust
Series 2019-XL, Class E, 1 mo. USD LIBOR + 1.800% 2.197% FRN 10/15/36 (a)	$	268,600	$	265,758
Series 2021-SOAR, Class E, 1 mo. USD LIBOR + 1.800% 2.197% FRN 6/15/38 (a)		327,000		318,425
Series 2021-VOLT, Class E, 1 mo. USD LIBOR + 2.000% 2.397% FRN 9/15/36 (a)		792,000		762,053
Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000% 2.397% FRN 10/15/36 (a)		753,100		739,017
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class E, 1 mo. USD LIBOR + 2.150%
2.547% FRN 12/15/37 (a)		545,194		535,677
Commercial Mortgage Trust, Series 2014-CR14, Class A2
3.147% 2/10/47		78,531		78,903
Credit Suisse Mortgage Capital Certificates, Series 2019-ICE4, Class D, 1 mo. USD LIBOR + 1.600%
1.997% FRN 5/15/36 (a)		200,000		197,751
KIND Trust
Series 2021-KIND, Class B, 1 mo. USD LIBOR + 1.350% 1.747% FRN 8/15/38 (a)		550,000		538,321
Series 2021-KIND, Class C, 1 mo. USD LIBOR + 1.750% 2.147% FRN 8/15/38 (a)		600,000		591,802
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800%
2.197% FRN 5/15/36 (a)		251,000		247,407
Life Mortgage Trust, Series 2021-BMR, Class E, 1 mo. USD LIBOR + 1.750%
2.147% FRN 3/15/38 (a)		365,665		351,275
MHC Commercial Mortgage Trust, Series 2021-MHC, Class E, 1 mo. USD LIBOR + 2.101%
2.498% FRN 4/15/38 (a)		620,000		605,274
Morgan Stanley Bank of America Merrill Lynch Trust, Series 2013-C7, Class B
3.769% 2/15/46		250,000		247,796
Morgan Stanley Capital I Trust, Series 2012-STAR, Class D,
3.927% VRN 8/05/34 (a) (d)		400,000		397,214
Oak Street Investment Grade Net Lease Fund, Series 2020-1A, Class A3
2.260% 11/20/50 (a)		400,000		376,180
One New York Plaza Trust
Series 2020-1NYP, Class C, 1 mo. USD LIBOR + 2.200% 2.597% FRN 1/15/36 (a)		616,000		606,889
Series 2020-1NYP, Class D, 1 mo. USD LIBOR + 2.750% 3.147% FRN 1/15/36 (a)		414,000		407,877

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

	Principal Amount		Value
VASA Trust, Series 2021-VASA, Class D, 1 mo. USD LIBOR + 2.100%
2.497% FRN 7/15/39 (a)	$	711,000	$	700,362
				9,357,645
Home Equity Asset-Backed Securities — 0.0%
Credit Suisse Seasoned Loan Trust, Series 2006-1, Class A, 1 mo. USD LIBOR + .480%
0.937% FRN 10/25/34 (a)		26,340		26,325
Other Asset-Backed Securities — 17.9%
321 Henderson Receivables LLC
Series 2006-1A, Class A1, 1 mo. USD LIBOR + .200% 0.597% FRN 3/15/41 (a)		12,317		12,272
Series 2010-3A, Class A, 3.820% 12/15/48 (a)		112,508		112,215
Adams Outdoor Advertising LP, Series 2018-1, Class A
4.810% 11/15/48 (a)		362,586		367,075
Affirm Asset Securitization Trust, Series 2021-A, Class D
3.490% 8/15/25 (a)		950,000		937,810
AIMCO CLO 10 Ltd., Series 2019-10A, Class AR, 3 mo. USD LIBOR + 1.060%
1.319% FRN 7/22/32 (a)		1,000,000		990,909
Apidos CLO XXVI, Series 2017-26A, Class A2R, 3 mo. USD LIBOR + 1.500%
1.741% FRN 7/18/29 (a)		500,000		495,541
Aqua Finance Trust, Series 2021-A, Class A
1.540% 7/17/46 (a)		1,377,996		1,315,230
Ballyrock CLO Ltd., Series 2020-2A, Class A2R, 3 mo. USD LIBOR + 1.550%
1.804% FRN 10/20/31 (a)		800,000		790,034
Bankers Healthcare Group Trust, Series 2021-B, Class C
2.240% 10/17/34 (a)		448,000		410,151
BlueMountain Fuji US CLO I Ltd., Series 2017-1A, Class A1R, 3 mo. USD LIBOR + .980%
1.234% FRN 7/20/29 (a)		550,000		547,004
BRE Grand Islander Timeshare Issuer LLC
Series 2017-1A, Class A, 2.940% 5/25/29 (a)		59,840		59,273
Series 2019-A, Class B, 3.780% 9/26/33 (a)		180,933		179,094
Business Jet Securities LLC
Series 2021-1A, Class A, 2.162% 4/15/36 (a)		557,742		519,141
Series 2020-1A, Class A, 2.981% 11/15/35 (a)		169,407		163,268

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

	Principal Amount		Value
Canyon Capital CLO Ltd., Series 2017-1A, Class CR, 3 mo. USD LIBOR + 2.000%
2.241% FRN 7/15/30 (a)	$	300,000	$	296,313
Capital Automotive REIT
Series 2020-1A, Class B1, 4.170% 2/15/50 (a)		484,000		474,413
Series 2017-1A, Class A2, 4.180% 4/15/47 (a)		586,369		584,666
Castlelake Aircraft Structured Trust, Series 2018-1, Class A
4.125% 6/15/43 (a)		179,652		161,988
Cedar Funding IX CLO Ltd., Series 2018-9A, Class A1, 3 mo. USD LIBOR + .980%
1.234% FRN 4/20/31 (a)		250,000		248,641
CF Hippolyta LLC, Series 2020-1, Class B1
2.280% 7/15/60 (a)		92,971		87,066
CIFC Funding Ltd., Series 2017-4A, Class A2R, 3 mo. USD LIBOR + 1.550%
1.809% FRN 10/24/30 (a)		500,000		496,831
DataBank Issuer, Series 2021-1A, Class A2
2.060% 2/27/51 (a)		991,000		917,902
Diamond Resorts Owner Trust, Series 2018-1, Class A
3.700% 1/21/31 (a)		77,416		77,761
Elara HGV Timeshare Issuer LLC
Series 2017-A, Class A, 2.690% 3/25/30 (a)		64,098		64,125
Series 2016-A, Class A, 2.730% 4/25/28 (a)		110,449		109,773
Series 2017-A, Class B, 2.960% 3/25/30 (a)		189,920		186,599
Series 2019-A, Class C, 3.450% 1/25/34 (a)		391,319		386,795
FCI Funding LLC, Series 2019-1A, Class A
3.630% 2/18/31 (a)		18,125		18,152
Firstkey Homes Trust, Series 2021, Class E2
2.489% 8/17/38 (a)		460,000		411,489
Flatiron CLO 17 Ltd., Series 2017-1A, Class AR, 3 mo. USD LIBOR + .980%
1.486% FRN 5/15/30 (a)		500,000		497,250
FNA VI LLC, Series 21-1A, Class A
1.350% 1/10/32 (a)		1,626,485		1,552,794
Goodgreen Trust
Series 2019-2A, Class A, 2.760% 4/15/55 (a)		420,079		400,920
Series 2016-1A, Class A, 3.230% 10/15/52 (a)		203,437		198,978
Series 2019-1A, Class A, 3.860% 10/15/54 (a)		196,446		193,973
Series 2018-1A, Class A, 3.930% VRN 10/15/53 (a) (d)		178,852		177,487
Hero Funding Trust
Series 2017-3A, Class A1, 3.190% 9/20/48 (a)		107,652		105,940
Series 2016-4A, Class A1, 3.570% 9/20/47 (a)		105,745		104,858
Series 2015-1A, Class A, 3.840% 9/21/40 (a)		219,885		221,075
Series 2018-1A, Class A2, 4.670% 9/20/48 (a)		191,900		193,892

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

	Principal Amount		Value
HIN Timeshare Trust, Series 2020-A, Class B
2.230% 10/09/39 (a)	$	632,632	$	603,175
Horizon Aircraft Finance I Ltd., Series 2018-1, Class A
4.458% 12/15/38 (a)		481,515		443,368
Horizon Aircraft Finance III Ltd.
Series 2019-2, Class A, 3.425% 11/15/39 (a)		362,548		334,220
Series 2019-2, Class B, 4.458% 11/15/39 (a)		683,333		614,308
KKR CLO Ltd., Series 28A, Class A, 3 mo. USD LIBOR + 1.140%
1.966% FRN 3/15/31 (a)		250,000		248,461
KREF Ltd., Series 2021-FL2, Class AS, 1 mo. USD LIBOR + 1.300%
1.741% FRN 2/15/39 (a)		900,000		880,504
Lendingpoint Asset Securitization, Series 2021-A, Class B
1.110% 2/15/29 (a)		1,128,710		1,112,068
MACH 1 Cayman Ltd., Series 2019-1, Class A
3.474% 10/15/39 (a)		282,386		262,098
Marlette Funding Trust, Series 2019-2A, Class B
3.530% 7/16/29 (a)		139		139
Mosaic Solar Loans LLC
Series 2018-2GS, Class A, 4.200% 2/22/44 (a)		158,512		157,567
Series 2017-1A, Class A, 4.450% 6/20/42 (a)		38,201		38,282
Neuberger Berman Loan Advisers CLO 25 Ltd., Series 2017-25A, Class BR, 3 mo. USD LIBOR + 1.350%
1.591% FRN 10/18/29 (a)		1,000,000		990,405
Newark BSL CLO 2 Ltd., Series 2017-1A, Class A2R, 3 mo. USD LIBOR + 1.400%
1.658% FRN 7/25/30 (a)		250,000		246,283
NP SPE II LP, Series 2017-1A, Class A1
3.372% 10/21/47 (a)		109,140		107,878
NRZ Advance Receivables Trust, Series 2020-T3, Class DT3
2.458% 10/15/52 (a)		246,600		235,922
Orange Lake Timeshare Trust, Series 2016-A, Class B
2.910% 3/08/29 (a)		72,633		72,698
Oxford Finance Funding Trust, Series 2020-1A, Class A2
3.101% 2/15/28 (a)		268,801		268,193
Rad CLO 1 Ltd., Series 2018-1A, Class BR, 3 mo. USD LIBOR + 1.400%
1.641% FRN 7/15/31 (a)		350,000		345,792
RAMP Trust, Series 2005-EFC1, Class M5, 1 mo. USD LIBOR + .650%
1.432% FRN 5/25/35		338,369		336,499
RR 3 Ltd., Series 2018-3A, Class A1R2, 3 mo. USD LIBOR + 1.090%
1.331% FRN 1/15/30 (a)		400,000		397,933
SBA Tower Trust, Series 2014-2A, Class C,
3.869% STEP 10/15/49 (a)		430,000		434,344
Sierra Receivables Funding LLC

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

	Principal Amount		Value
Series 2020-2A, Class C, 3.510% 7/20/37 (a)	$	55,630	$	55,184
Series 2018-1A, Class B, 4.036% 4/20/35		174,464		175,437
SoFi Consumer Loan Program Trust, Series 2019-3, Class D
3.890% 5/25/28 (a)		772,000		776,761
Store Master Funding I-VII, Series 2018-1A, Class A3
4.400% 10/20/48 (a)		507,433		500,241
Structured Asset Securities Corp. Mortgage Loan Trust, Series 2006-GEL1, Class M2, 1 mo. USD LIBOR + 1.200%
1.657% FRN 11/25/35 (a)		124,465		121,885
TAL Advantage VII LLC, Series 2020-1A, Class B
3.290% 9/20/45 (a)		758,250		732,991
Thrust Engine Leasing, Series 2021-1A, Class A
4.163% 7/15/40 (a)		587,934		549,929
TICP CLO XI Ltd., Series 2018-11A, Class A, 3 mo. USD LIBOR + 1.180%
1.434% FRN 10/20/31 (a)		400,000		398,155
Treman Park CLO Ltd., Series 2015-1A, Class ARR, 3 mo. USD LIBOR + 1.070%
1.324% FRN 10/20/28 (a)		491,231		491,044
Vantage Data Centers Issuer LLC, Series 2020-1A, Class A2
1.645% 9/15/45 (a)		675,000		634,388
VERDE CLO Ltd., Series 2019-1A, Class AR, 3 mo. USD LIBOR + 1.100%
1.341% FRN 4/15/32 (a)		500,000		495,453
Welk Resorts LLC, Series 2017-AA, Class B
3.410% 6/15/33 (a)		61,195		61,135
Willis Engine Structured Trust IV, Series 2018-A, Class A,
4.750% STEP 9/15/43 (a)		202,397		187,161
				28,378,599
Student Loans Asset-Backed Securities — 5.8%
Access Group, Inc., Series 2015-1, Class B, 1 mo. USD LIBOR + 1.500%
1.957% FRN 7/25/58 (a)		140,000		128,072
College Avenue Student Loans LLC
Series 2018-A, Class A1, 1 mo. USD LIBOR + 1.200% 1.657% FRN 12/26/47 (a)		312,161		309,672
Series 2017-A, Class A1, FRN, 1 mo. USD LIBOR + 1.650% 2.107% FRN 11/26/46 (a)		233,088		235,424
Series 2021-A, Class B, 2.320% 7/25/51 (a)		1,091,000		1,044,960
Series 2017-A, Class B, 4.500% 11/26/46 (a)		352,987		348,382
College Loan Corp. Trust, Series 2005-2, Class B, 3 mo. USD LIBOR + .490%
0.729% FRN 1/15/37		133,102		121,076
Commonbond Student Loan Trust

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

	Principal Amount		Value
Series 2018-AGS, Class C, 3.820% 2/25/44 (a)	$	20,370	$	19,112
Series 2018-BGS, Class C, 4.120% 9/25/45 (a)		22,275		21,186
Series 2018-CGS, Class C, 4.350% 2/25/46 (a)		10,784		10,249
Series 2017-AGS, Class C, 5.280% 5/25/41 (a)		44,411		43,569
Credit Suisse ABS Repackaging Trust, Series 2013-A, Class B
2.500% 1/25/30 (a)		42,942		42,096
DRB Prime Student Loan Trust, Series 2017-B, Class CFX
3.610% 8/25/42 (a)		172,101		169,594
EdLinc Student Loan Funding, Series 2017-A, Class A, Prime Rate - 1.150%
2.100% 12/01/47 (a)		176,015		173,932
ELFI Graduate Loan Program LLC, Series 2018-A, Class B
4.000% 8/25/42 (a)		70,337		69,638
Higher Education Funding I, Series 2004-1, Class B1,
1.796% FRN 1/01/44 (a) (d)		950,000		852,430
Laurel Road Prime Student Loan Trust
Series 2019-A, Class BFX, 3.000% 10/25/48 (a)		256,646		250,165
Series 2018-B, Class BFX, 3.720% 5/26/43 (a)		191,151		188,322
Navient Private Education Refi Loan Trust, Series 2020-BA, Class B
2.770% 1/15/69 (a)		2,200,000		2,113,062
Nelnet Private Education Loan Trust, Series 2016-A, Class A1A, 1 mo. USD LIBOR + 1.750%
2.207% FRN 12/26/40 (a)		26,066		26,052
Nelnet Student Loan Trust, Series 2015-3A, Class B, 1 mo. USD LIBOR + 1.500%
1.957% FRN 6/25/54 (a)		130,000		129,999
Pennsylvania Higher Education Assistance Agency, Series 2006-2, Class B,
1.420% FRN 10/25/42 (d)		300,000		299,370
SLC Student Loan Trust, Series 2005-1, Class B, 3 mo. USD LIBOR + .200%
0.706% FRN 2/15/45		243,772		226,137
SLM Student Loan Trust
Series 2006-7, Class B, 3 mo. USD LIBOR + .200% 0.458% FRN 1/27/42		742,904		687,491
Series 2006-5, Class B, 3 mo. USD LIBOR + .210% 0.468% FRN 10/25/40		322,919		301,359
Series 2005-6, Class B, 3 mo. USD LIBOR + .290% 0.548% FRN 1/25/44		402,678		379,161
Series 2003-14, Class A6, 3 mo. USD LIBOR + .300% 0.558% FRN 7/25/25		37,159		37,103
Series 2005-9, Class B, 3 mo. USD LIBOR + .300% 0.558% FRN 1/25/41		308,025		287,782
Series 2005-8, Class B, 3 mo. USD LIBOR + .310% 0.568% FRN 1/25/55		120,316		114,122
SMB Private Education Loan Trust
Series 2018-C, Class A2B, 1 mo. USD LIBOR + .750% 1.147% FRN 11/15/35 (a)		307,706		307,497
Series 2016-C, Class A2B, 1 mo. USD LIBOR + 1.100% 1.497% FRN 9/15/34 (a)		105,921		106,399
SoFi Professional Loan Program LLC

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

	Principal Amount		Value
Series 2016-D, Class A1, 1 mo. USD LIBOR + .950% 1.407% FRN 1/25/39 (a)	$	13,395	$	13,257
Series 2016-B, Class A1, 1 mo. USD LIBOR + 1.200% 1.657% FRN 6/25/33 (a)		25,473		25,485
				9,082,155
Whole Loan Collateral Collateralized Mortgage Obligations — 8.2%
Angel Oak Mortgage Trust
Series 2020-5, Class A2, 1.579% VRN 5/25/65 (a) (d)		146,470		143,632
Series 2020-5, Class A3, 2.041% VRN 5/25/65 (a) (d)		132,020		129,751
Series 2021-1, Class M1, 2.215% VRN 1/25/66 (a) (d)		314,000		297,903
Bank of America Mortgage Securities, Series 2004-G, Class 2A7,
2.507% VRN 8/25/34 (d)		1,949		1,904
BRAVO Residential Funding Trust, Series 2020-NQM1, Class A3,
2.406% VRN 5/25/60 (a) (d)		124,641		124,035
CIM Trust, Series 2019-INV3, Class A11, 1 mo. USD LIBOR + 1.000%
1.137% FRN 8/25/49 (a)		407,255		406,356
Citigroup Mortgage Loan Trust
Series 2019-IMC1, Class A3, 3.030% VRN 7/25/49 (a) (d)		113,171		112,832
Series 2019-IMC1, Class M1, 3.170% VRN 7/25/49 (a) (d)		391,000		387,477
Credit Suisse Mortgage Capital Certificates, Series 2021-NQM4, Class M1,
2.472% VRN 5/25/66 (a) (d)		500,000		458,021
Credit Suisse Mortgage Trust, Series 2021-NQM2, Class A3,
1.538% VRN 2/25/66 (a) (d)		659,726		627,856
Deephaven Residential Mortgage Trust, Series 2021-1, Class A3,
1.128% VRN 5/25/65 (a) (d)		209,224		203,607
Flagstar Mortgage Trust, Series 2021-6INV, Class A18,
2.500% VRN 8/25/51 (a) (d)		621,443		568,839
Homeward Opportunities Fund I Trust, Series 2020-2, Class A1,
1.657% VRN 5/25/65 (a) (d)		81,958		81,263
Lakeview Trust, Series 2022-1, Class M3
4.585% 4/25/52 (a) (e)		1,600,000		1,600,000
MFRA Trust, Series 2021-NQM2, Class A3,
1.472% VRN 11/25/64 (a) (d)		509,153		481,934
New Residential Mortgage Loan Trust, Series 2016-4A, Class A1,
3.750% VRN 11/25/56 (a) (d)		142,660		143,354
NewRez Warehouse Securitization Trust, Series 2021-1, Class C, 1 mo. USD LIBOR + 1.050%
1.507% FRN 5/25/55 (a)		927,000		926,869
NLT Trust
Series 2021-INV2, Class A3, 1.520% VRN 8/25/56 (a) (d)		790,722		734,837
Series 2021-INV2, Class M1, 2.569% VRN 8/25/56 (a) (d)		700,000		615,204

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

	Principal Amount		Value
OBX Trust, Series 2020-INV1, Class A21,
3.500% VRN 12/25/49 (a) (d)	$	179,817	$	178,768
Onslow Bay Financial LLC
Series 2021-NQM3, Class A3, 1.362% VRN 7/25/61 (a) (d)		936,182		876,766
Series 2021-NQM1, Class M1, 2.219% VRN 2/25/66 (a) (d)		333,000		308,753
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850%
3.307% FRN 2/25/23 (a)		250,000		248,922
Shellpoint Co-Originator Trust, Series 2016-1, Class 2A3,
3.000% VRN 10/25/31 (a) (d)		230,723		227,769
STAR Trust, Series 2021-1, Class A3,
1.528% VRN 5/25/65 (a) (d)		875,303		837,182
Starwood Mortgage Residential Trust
Series 2021-3, Class A3, 1.518% VRN 6/25/56 (a) (d)		270,777		255,783
Series 2019-INV1, Class A3, 2.916% VRN 9/27/49 (a) (d)		532,984		528,037
Verus Securitization Trust
Series 2021-5, Class A3, 1.373% VRN 9/25/66 (a) (d)		249,898		229,956
Series 2019-INV2, Class A3, 3.219% VRN 7/25/59 (a) (d)		512,707		508,482
Series 2019-INV3, Class M1, 3.279% VRN 11/25/59 (a) (d)		265,000		254,696
Series 2020-4, Class M1, 3.291% VRN 5/25/65 (a) (d)		548,000		527,986
				13,028,774
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $65,999,241)				64,057,285
U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (f) — 1.3%
Pass-Through Securities — 0.0%
Federal National Mortgage Association Pool #775539 12 mo. USD LIBOR + 1.641% 1.891% 5/01/34		2,351		2,427
Government National Mortgage Association
Pool #371146 7.000% 9/15/23		2		2
Pool #352022 7.000% 11/15/23		184		189
Pool #491089 7.000% 12/15/28		847		889
Pool #500928 7.000% 5/15/29		493		535
Pool #499410 7.000% 7/15/29		184		200
Pool #510083 7.000% 7/15/29		57		62
Pool #493723 7.000% 8/15/29		369		402
Pool #581417 7.000% 7/15/32		712		768
Government National Mortgage Association II
Pool #008746 1 year CMT + 1.500% 1.750% FRN 11/20/25		261		261

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

	Principal Amount		Value
Pool #080136 1 year CMT + 1.500% 1.750% FRN 11/20/27	$	72	$	73
				5,808
Whole Loans — 1.3%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes
Series 2021-DNA6, Class M2, 30 Day SOFR + 1.500% 1.599% FRN 10/25/41 (a)		1,046,000		998,499
Series 2021-DNA2, Class M2, 30 Day SOFR + 2.300% 2.399% FRN 8/25/33 (a)		1,121,000		1,104,975
				2,103,474
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $2,172,333)				2,109,282
U.S. TREASURY OBLIGATIONS — 0.4%
U.S. Treasury Bonds & Notes — 0.4%
U.S. Treasury Note
1.750% 12/31/24 (g)		700,000		686,402
TOTAL U.S. TREASURY OBLIGATIONS (Cost $711,922)				686,402
TOTAL BONDS & NOTES (Cost $152,707,442)				146,181,666
TOTAL PURCHASED OPTIONS (#) — 0.1% (Cost $147,532)				143,774
MUTUAL FUNDS — 0.2%
Diversified Financial Services — 0.2%
State Street Navigator Securities Lending Government Money Market Portfolio (h)		324,515		324,515
TOTAL MUTUAL FUNDS (Cost $324,515)				324,515
TOTAL LONG-TERM INVESTMENTS (Cost $153,179,489)				146,649,955

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

	Principal Amount		Value
SHORT-TERM INVESTMENTS — 4.7%
Commercial Paper — 2.5%
Ingredion, Inc.
0.964% 4/08/22 (a)	$	1,000,000	$	999,875
Southern Co. Gas Capital Corp.
0.761% 4/04/22 (a)		3,000,000		2,999,804
				3,999,679
Repurchase Agreement — 2.2%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/22, 0.000%, due 4/01/22 (i)		3,452,027		3,452,027
TOTAL SHORT-TERM INVESTMENTS (Cost $7,451,655)				7,451,706
TOTAL INVESTMENTS — 97.4% (Cost $160,631,144) (j)				154,101,661
Other Assets/(Liabilities) — 2.6%				4,100,403
NET ASSETS — 100.0%			$	158,202,064

Abbreviation Legend

CLO Collateralized Loan Obligation

FRN Floating Rate Note

STEP Step Up Bond

VRN Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At March 31, 2022, the aggregate market value of these securities amounted to $101,441,857 or 64.12% of net assets.

(b) Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2022, was $723,282 or 0.46% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $415,388 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) 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, 2022.

(e) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At March 31, 2022, these securities amounted to a value of $1,600,000 or 1.01% of net assets.

(f) May contain securities that are issued by a U.S. Government Agency, but are unsecured and are not guaranteed by a U.S. Government Agency.

(g) All or a portion of this security is pledged/held as collateral for open derivatives.

(h) Represents investment of security lending cash collateral. (Note 2).

(i) Maturity value of $3,452,027. Collateralized by U.S. Government Agency obligations with a rate of 0.375%, maturity date of 9/15/24, and an aggregate market value, including accrued interest, of $3,521,092.

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

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

(#) Interest Rate Swaptions Purchased

Paid by Fund

Received by Fund

Description

Counterparty

Expiration Date

Rate

Frequency

Rate

Frequency

Notional Amount

Value

Premium Paid (Received)

Unrealized Appreciation/ (Depreciation)

Put

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

Credit Suisse International

1/31/33

3.11%##

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

USD

3,080,000

$

143,774

$

147,532

$

(3,758)

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Long Bond	6/21/22		6	$	928,516	$	(28,141)
Short
U.S. Treasury Ultra 10 Year	6/21/22		19	$	(2,654,532)	$	80,626
U.S. Treasury Note 2 Year	6/30/22		55		(11,799,149)		143,446
U.S. Treasury Note 5 Year	6/30/22		384		(45,157,396)		1,117,396
						$	1,341,468

Centrally Cleared Interest Rate Swaps
Paid by the Fund		Received by the Fund
Rate/ Reference	Frequency	Rate/ Reference		Frequency		Termination Date		Notional Amount		Value		Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
3-Month USD LIBOR BBA	Quarterly		Fixed 1.047%		Semi-Annually		11/22/24	USD	27,500,000	$	(1,065,972)	$	—	$	(1,065,972)
3-Month USD LIBOR BBA	Quarterly		Fixed 1.174%		Semi-Annually		1/04/25	USD	49,500,000		(1,862,545)		—		(1,862,545)
12-Month USD SOFR	Annually		Fixed 1.462%		Annually		2/09/25	USD	50,000,000		(1,191,743)		—		(1,191,743)
										$	(4,120,260)	$	—	$	(4,120,260)

## Exercise Rate.

Currency Legend

USD U.S. Dollar

MML Small Cap Equity Fund —  Portfolio of Investments

March 31, 2022 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.9%
COMMON STOCK — 98.9%
Basic Materials — 2.8%
Chemicals — 0.8%
Amyris, Inc. (a) (b)		73,270	$	319,457
NewMarket Corp.		2,313		750,291
				1,069,748
Mining — 2.0%
Compass Minerals International, Inc.		23,344		1,465,770
Kaiser Aluminum Corp.		13,156		1,238,769
				2,704,539
				3,774,287
Communications — 2.5%
Internet — 1.5%
Bumble, Inc. Class A (a)		17,698		512,888
Q2 Holdings, Inc. (a) (b)		25,763		1,588,289
				2,101,177
Telecommunications — 1.0%
EchoStar Corp. Class A (a)		53,215		1,295,253
				3,396,430
Consumer, Cyclical — 11.6%
Airlines — 0.5%
Spirit Airlines, Inc. (a) (b)		32,798		717,292
Auto Parts & Equipment — 2.9%
Allison Transmission Holdings, Inc.		22,392		879,110
Dorman Products, Inc. (a)		16,804		1,596,884
Visteon Corp. (a)		13,202		1,440,734
				3,916,728
Entertainment — 0.9%
Cedar Fair LP (a) (c)		23,879		1,308,569
Home Builders — 0.5%
Skyline Champion Corp. (a)		12,098		663,938
Lodging — 0.6%
Boyd Gaming Corp.		11,756		773,310

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

	Number of Shares		Value
Retail — 6.2%
AutoNation, Inc. (a)		23,786	$	2,368,610
BJ's Wholesale Club Holdings, Inc. (a)		32,089		2,169,537
Denny's Corp. (a)		88,814		1,270,929
Suburban Propane Partners LP (c)		80,589		1,297,483
Texas Roadhouse, Inc.		15,477		1,295,889
				8,402,448
				15,782,285
Consumer, Non-cyclical — 22.9%
Biotechnology — 1.7%
Avid Bioservices, Inc. (a) (b)		57,442		1,170,094
Intra-Cellular Therapies, Inc. (a)		11,171		683,553
Twist Bioscience Corp. (a)		9,939		490,788
				2,344,435
Commercial Services — 5.6%
ASGN, Inc. (a)		20,508		2,393,488
Korn Ferry		35,645		2,314,786
Monro, Inc.		33,191		1,471,689
Paya Holdings, Inc. (a)		124,695		730,713
Payoneer Global, Inc. (a) (b)		157,517		702,526
				7,613,202
Food — 1.4%
The Simply Good Foods Co. (a)		50,311		1,909,302
Health Care – Products — 4.4%
AtriCure, Inc. (a)		24,834		1,630,849
BioLife Solutions, Inc. (a)		25,732		584,888
Inspire Medical Systems, Inc. (a)		9,716		2,494,000
Tandem Diabetes Care, Inc. (a)		10,889		1,266,282
				5,976,019
Health Care – Services — 7.1%
Acadia Healthcare Co., Inc. (a)		36,290		2,378,084
Addus HomeCare Corp. (a)		17,297		1,613,637
LHC Group, Inc. (a)		13,835		2,332,581
Tenet Healthcare Corp. (a)		37,647		3,236,136
				9,560,438
Household Products & Wares — 0.6%
ACCO Brands Corp.		97,682		781,456
Pharmaceuticals — 2.1%
BellRing Brands, Inc. (a) (b)		59,631		1,376,284
Collegium Pharmaceutical, Inc. (a)		32,949		670,842
Heska Corp. (a)		5,966		824,978
				2,872,104
				31,056,956

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

	Number of Shares		Value
Energy — 4.4%
Oil & Gas — 3.0%
Chesapeake Energy Corp. (b)		20,144	$	1,752,528
CNX Resources Corp. (a)		59,334		1,229,400
Helmerich & Payne, Inc.		25,852		1,105,949
				4,087,877
Oil & Gas Services — 0.8%
Nov, Inc.		54,438		1,067,529
Pipelines — 0.6%
Equitrans Midstream Corp.		91,630		773,357
				5,928,763
Financial — 20.6%
Banks — 6.8%
The Bank of NT Butterfield & Son Ltd.		23,713		850,822
BankUnited, Inc.		39,800		1,749,608
Cathay General Bancorp		33,318		1,490,981
Columbia Banking System, Inc.		19,084		615,841
FB Financial Corp.		18,142		805,868
Heritage Financial Corp.		34,698		869,532
Silvergate Capital Corp. Class A (a)		6,713		1,010,776
Webster Financial Corp.		33,026		1,853,419
				9,246,847
Diversified Financial Services — 3.9%
Federated Hermes, Inc.		38,874		1,324,049
Focus Financial Partners, Inc. Class A (a)		31,627		1,446,619
Stifel Financial Corp.		36,548		2,481,609
				5,252,277
Insurance — 1.0%
Definity Financial Corp.		55,027		1,405,441
Real Estate Investment Trusts (REITS) — 4.9%
DiamondRock Hospitality Co. (a)		166,155		1,678,166
Four Corners Property Trust, Inc.		69,398		1,876,522
National Storage Affiliates Trust		38,621		2,423,854
Sabra Health Care REIT, Inc.		44,251		658,897
				6,637,439
Savings & Loans — 4.0%
Berkshire Hills Bancorp, Inc.		33,534		971,480
OceanFirst Financial Corp.		42,528		854,813
Pacific Premier Bancorp, Inc.		41,430		1,464,550
WSFS Financial Corp.		44,326		2,066,478
				5,357,321
				27,899,325

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

	Number of Shares		Value
Industrial — 15.9%
Aerospace & Defense — 1.2%
Curtiss-Wright Corp.		11,019	$	1,654,613
Building Materials — 2.2%
Masonite International Corp. (a)		13,692		1,217,766
Summit Materials, Inc. Class A (a)		56,544		1,756,257
				2,974,023
Electronics — 1.5%
Atkore, Inc. (a)		20,583		2,026,190
Engineering & Construction — 1.7%
Primoris Services Corp.		29,083		692,757
TopBuild Corp. (a)		8,752		1,587,525
				2,280,282
Environmental Controls — 1.9%
Evoqua Water Technologies Corp. (a)		54,047		2,539,128
Hand & Machine Tools — 1.0%
Regal Rexnord Corp.		9,493		1,412,369
Machinery – Construction & Mining — 0.6%
BWX Technologies, Inc.		15,295		823,789
Machinery – Diversified — 1.4%
Zurn Water Solutions Corp.		52,890		1,872,306
Metal Fabricate & Hardware — 0.9%
Valmont Industries, Inc.		4,875		1,163,175
Miscellaneous - Manufacturing — 1.1%
EnPro Industries, Inc.		15,477		1,512,567
Packaging & Containers — 0.8%
Silgan Holdings, Inc.		25,113		1,160,974
Transportation — 1.6%
CryoPort, Inc. (a)		31,926		1,114,537
Hub Group, Inc. Class A (a)		13,572		1,047,894
				2,162,431
				21,581,847
Technology — 14.4%
Computers — 3.3%
CACI International, Inc. Class A (a)		6,983		2,103,698
KBR, Inc.		42,857		2,345,564
				4,449,262
Semiconductors — 5.3%
Allegro MicroSystems, Inc. (a)		34,732		986,389
Ambarella, Inc. (a)		8,438		885,315
Azenta, Inc.		26,271		2,177,340
MKS Instruments, Inc.		10,001		1,500,150

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

	Number of Shares		Value
Semtech Corp. (a)		23,687	$	1,642,457
				7,191,651
Software — 5.8%
Bottomline Technologies de, Inc. (a)		23,435		1,328,296
Consensus Cloud Solutions, Inc. (a)		13,246		796,482
Envestnet, Inc. (a)		11,526		857,995
Olo, Inc. Class A (a)		26,082		345,587
Paycor HCM, Inc. (a)		59,397		1,729,047
Sprout Social, Inc. Class A (a)		5,929		475,031
Ziff Davis, Inc. (a)		24,967		2,416,306
				7,948,744
				19,589,657
Utilities — 3.8%
Electric — 1.5%
Avista Corp.		44,841		2,024,571
Gas — 2.3%
National Fuel Gas Co.		25,684		1,764,491
Northwest Natural Holding Co.		25,444		1,315,964
				3,080,455
				5,105,026
TOTAL COMMON STOCK (Cost $89,606,916)				134,114,576
TOTAL EQUITIES (Cost $89,606,916)				134,114,576
MUTUAL FUNDS — 1.4%
Diversified Financial Services — 1.4%
State Street Navigator Securities Lending Government Money Market Portfolio (d)		1,907,242		1,907,242
TOTAL MUTUAL FUNDS (Cost $1,907,242)				1,907,242
TOTAL LONG-TERM INVESTMENTS (Cost $91,514,158)				136,021,818
	Principal Amount
SHORT-TERM INVESTMENTS — 2.5%
Repurchase Agreement — 2.5%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/22, 0.000%, due 4/01/22 (e)	$	3,461,298		3,461,298
TOTAL SHORT-TERM INVESTMENTS (Cost $3,461,298)				3,461,298

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

	Principal Amount	Value
TOTAL INVESTMENTS — 102.8% (Cost $94,975,456) (f)		$	139,483,116
Other Assets/(Liabilities) — (2.8)%			(3,811,188)
NET ASSETS — 100.0%		$	135,671,928

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, 2022, was $4,607,885 or 3.40% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $2,803,063 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 $3,461,298. Collateralized by U.S. Government Agency obligations with a rate of 0.500%, maturity date of 4/15/24, and an aggregate market value, including accrued interest, of $3,530,616.

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

MML Special Situations Fund —  Portfolio of Investments

March 31, 2022 (Unaudited)

	Number of Shares		Value
EQUITIES — 100.0%
COMMON STOCK — 100.0%
Basic Materials — 6.5%
Chemicals — 6.5%
Dow, Inc.		32,337	$	2,060,514
Communications — 24.3%
Internet — 23.9%
Airbnb, Inc. Class A (a)		15,134		2,599,416
Bumble, Inc. Class A (a)		3,137		90,910
Chewy, Inc. Class A (a) (b)		3,834		156,351
DoorDash, Inc., Class A (a)		7,079		829,588
Lyft, Inc. Class A (a)		12,905		495,552
Marqeta, Inc. Class A (a)		10,078		111,261
Pinterest, Inc. Class A (a)		24,606		605,554
Robinhood Markets, Inc. (a) (b)		2,530		34,180
Uber Technologies, Inc. (a)		71,264		2,542,699
Vimeo, Inc. (a)		6,757		80,273
				7,545,784
Media — 0.4%
Altice USA, Inc. Class A (a)		9,790		122,179
				7,667,963
Consumer, Cyclical — 6.3%
Apparel — 0.2%
Kontoor Brands, Inc.		2,062		85,264
Auto Manufacturers — 1.1%
Rivian Automotive, Inc. Class A (a)		6,774		340,326
Distribution & Wholesale — 1.2%
IAA, Inc. (a)		5,845		223,571
Resideo Technologies, Inc. (a)		6,259		149,152
				372,723
Entertainment — 1.8%
Madison Square Garden Entertainment Corp. (a)		1,102		91,807
Penn National Gaming, Inc. (a)		7,270		308,393
Warner Music Group Corp. Class A		4,769		180,507
				580,707
Lodging — 1.1%
Wyndham Hotels & Resorts, Inc.		4,073		344,942

MML Special Situations Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Retail — 0.9%
Olaplex Holdings, Inc. (a)		3,090	$	48,297
Petco Health & Wellness Co., Inc. (a)		3,534		69,160
Victoria's Secret & Co. (a)		3,141		161,322
				278,779
				2,002,741
Consumer, Non-cyclical — 17.6%
Biotechnology — 8.3%
Corteva, Inc.		31,864		1,831,543
Maravai LifeSciences Holdings, Inc. Class A (a)		4,728		166,756
Royalty Pharma PLC Class A		15,601		607,815
				2,606,114
Commercial Services — 2.3%
Affirm Holdings, Inc. (a) (b)		6,403		296,331
Driven Brands Holdings, Inc. (a)		2,394		62,914
GXO Logistics, Inc. (a)		4,315		307,832
Toast, Inc., Class A (a)		3,196		69,449
				736,526
Health Care – Products — 3.1%
Avantor, Inc. (a)		26,650		901,303
Ortho Clinical Diagnostics Holdings PLC Class H (a)		4,929		91,975
				993,278
Health Care – Services — 0.5%
agilon health, Inc. (a)		2,048		51,917
Sotera Health Co. (a)		4,292		92,965
				144,882
Household Products & Wares — 0.2%
Reynolds Consumer Products, Inc.		2,364		69,360
Pharmaceuticals — 3.2%
Covetrus, Inc. (a)		4,479		75,202
Elanco Animal Health, Inc. (a)		20,663		539,098
Organon & Co.		11,075		386,850
				1,001,150
				5,551,310
Energy — 2.3%
Energy – Alternate Sources — 0.4%
Array Technologies, Inc. (a)		5,173		58,300
Shoals Technologies Group, Inc. Class A (a)		4,516		76,953
				135,253
Oil & Gas — 0.7%
DTE Midstream LLC (a)		4,193		227,512

MML Special Situations Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Oil & Gas Services — 0.7%
ChampionX Corp. (a)		8,759	$	214,420
Pipelines — 0.5%
Equitrans Midstream Corp.		17,623		148,738
				725,923
Financial — 8.7%
Diversified Financial Services — 1.6%
Rocket Cos., Inc. Class A		5,858		65,141
TPG, Inc. (a)		1,466		44,185
Tradeweb Markets, Inc. Class A		4,590		403,323
				512,649
Insurance — 2.5%
Brighthouse Financial, Inc. (a)		3,460		178,744
Equitable Holdings, Inc.		16,475		509,242
Ryan Specialty Group Holdings, Inc. Class A (a)		2,525		97,945
				785,931
Real Estate — 0.4%
Newmark Group, Inc. Class A		7,127		113,462
Real Estate Investment Trusts (REITS) — 4.2%
Apartment Income REIT Corp.		6,860		366,736
JBG SMITH Properties		4,948		144,581
Orion Office REIT, Inc.		2,348		32,872
VICI Properties, Inc.		27,486		782,251
				1,326,440
				2,738,482
Industrial — 12.5%
Building Materials — 5.9%
The AZEK Co., Inc (a)		4,833		120,052
Carrier Global Corp.		37,863		1,736,776
				1,856,828
Electronics — 1.4%
nVent Electric PLC		7,292		253,616
Vontier Corp.		7,328		186,058
				439,674
Engineering & Construction — 0.7%
Arcosa, Inc.		2,095		119,939
frontdoor, Inc. (a)		3,671		109,579
				229,518
Machinery – Diversified — 4.5%
Otis Worldwide Corp.		18,571		1,429,038
				3,955,058

MML Special Situations Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Technology — 19.3%
Computers — 0.3%
Kyndryl Holdings, Inc. (a)		7,765	$	101,877
Semiconductors — 0.5%
GLOBALFOUNDRIES, Inc. (a)		2,318		144,689
Software — 18.5%
AppLovin Corp. (a) (b)		1,178		64,872
Avaya Holdings Corp. (a)		3,650		46,246
C3.ai, Inc. (a) (b)		3,053		69,303
Concentrix Corp.		1,877		312,633
Consensus Cloud Solutions, Inc. (a)		696		41,851
Doximity, Inc. Class A (a)		2,111		109,962
Dropbox, Inc. Class A (a)		12,320		286,440
Freshworks, Inc. (a)		1,494		26,772
HashiCorp, Inc. Class A (a) (b)		663		35,802
Playtika Holding Corp. (a)		4,439		85,806
PowerSchool Holdings, Inc., Class A (a)		1,780		29,388
Qualtrics International Inc (a)		4,098		116,998
ROBLOX Corp. Class A (a)		1,829		84,573
SentinelOne Inc. Class A (a)		1,807		70,003
Snowflake, Inc. Class A (a)		10,130		2,321,087
UiPath, Inc. Class A (a)		11,212		242,067
Zoom Video Communications, Inc. Class A (a)		9,472		1,110,403
ZoomInfo Technologies, Inc. (a)		13,214		789,404
				5,843,610
				6,090,176
Utilities — 2.5%
Electric — 2.5%
Constellation Energy Corp.		14,248		801,450
TOTAL COMMON STOCK (Cost $35,832,938)				31,593,617
TOTAL EQUITIES (Cost $35,832,938)				31,593,617
MUTUAL FUNDS — 1.9%
Diversified Financial Services — 1.9%
State Street Navigator Securities Lending Government Money Market Portfolio (c)		589,417		589,417
TOTAL MUTUAL FUNDS (Cost $589,417)				589,417
TOTAL LONG-TERM INVESTMENTS (Cost $36,422,355)				32,183,034

MML Special Situations Fund —  Portfolio of Investments (Continued)

	Number of Shares	Value
TOTAL INVESTMENTS — 101.9% (Cost $36,422,355) (d)		$	32,183,034
Other Assets/(Liabilities) — (1.9)%			(584,652)
NET ASSETS — 100.0%		$	31,598,382

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, 2022, was $642,488 or 2.03% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $68,249 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, 2022 (Unaudited)

	Number of Shares		Value
EQUITIES — 95.9%
COMMON STOCK — 94.6%
Bermuda — 0.1%
Credicorp Ltd.		398	$	68,404
Brazil — 4.3%
Ambev SA		171,912		556,063
Americanas SA (a) (b) (c)		2,127		14,586
Americanas SA		90,406		619,980
Lojas Renner SA		66,936		386,625
Vale SA ADR Sponsored ADR		48,646		972,434
				2,549,688
Cayman Islands — 20.1%
Alibaba Group Holding Ltd. (c)		53,200		728,163
BeiGene Ltd. ADR (c)		3,637		685,938
Brii Biosciences Ltd. (c)		80,000		112,533
Grab Holdings, Ltd. (Acquired 6/18/19, Cost $1,512,249) (b) (c) (d)		319,800		1,119,300
Huazhu Group Ltd.		1,100		3,692
Huazhu Group Ltd. ADR		45,074		1,486,991
JD.com, Inc. Class A (c)		1,845		54,036
Keymed Biosciences, Inc. (b) (c) (e)		11,000		28,734
Keymed Biosciences, Inc. (c) (e)		6,806		18,714
Meituan Class B Class B (c) (e)		29,700		585,257
NetEase, Inc. ADR		20,571		1,845,013
New Horizon Health Ltd. (c) (e)		18,500		53,414
NU Holdings Ltd/Cayman Islands Class A (c)		37,803		291,839
OneConnect Financial Technology Co. Ltd. (c)		718		1,012
Pagseguro Digital Ltd. Class A (c)		20,813		417,301
Tencent Holdings Ltd.		41,009		1,934,616
Wuxi Biologics Cayman, Inc. (c) (e)		117,000		949,130
Zai Lab Ltd. ADR (c)		11,787		518,392
ZTO Express Cayman, Inc.		3,837		96,508
ZTO Express Cayman, Inc. ADR		39,668		991,700
				11,922,283
China — 0.1%
MicroTech Medical Hangzhou Co. Ltd. (c) (e)		20,200		29,251
Remegen Co. Ltd. Class H (c) (e)		2,250		13,261
				42,512
Cyprus — 0.0%
TCS Group Holding PLC (a) (b)		4,183		—
Egypt — 0.4%
Commercial International Bank Egypt SAE (c)		94,153		237,906

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

	Number of Shares		Value
France — 4.2%
Kering SA		951	$	600,745
L'Oreal SA		75		30,020
LVMH Moet Hennessy Louis Vuitton SE		110		78,328
Pernod Ricard SA		8,007		1,756,111
				2,465,204
Hong Kong — 5.1%
AIA Group Ltd.		277,600		2,906,314
Hong Kong Exchanges & Clearing Ltd.		3,000		141,381
				3,047,695
India — 19.7%
HDFC Bank Ltd.		8,978		173,242
HDFC Life Insurance Co. Ltd. (e)		15,624		110,266
Housing Development Finance Corp. Ltd.		111,543		3,484,804
Infosys Ltd.		56,106		1,404,060
Kotak Mahindra Bank Ltd.		113,446		2,607,466
Macrotech Developers Ltd. (c)		5,481		80,641
Oberoi Realty Ltd. (c)		29,404		362,774
Tata Consultancy Services Ltd.		50,552		2,488,062
Zee Entertainment Enterprises Ltd.		261,439		988,030
				11,699,345
Indonesia — 0.9%
Bank Central Asia Tbk PT		1,002,100		555,203
Italy — 1.4%
Moncler SpA		1,654		92,111
PRADA SpA		117,800		744,621
				836,732
Luxembourg — 0.3%
InPost SA (c)		26,644		167,472
Mexico — 9.6%
America Movil SAB de CV Sponsored ADR		25,082		530,484
Fomento Economico Mexicano SAB de CV		139,063		1,154,594
Grupo Mexico SAB de CV Series B		462,096		2,758,869
Wal-Mart de Mexico SAB de CV		309,296		1,267,507
				5,711,454
Netherlands — 0.0%
Yandex N.V. (a) (b) (c)		34,725		—
Philippines — 2.5%
Ayala Land, Inc.		638,200		431,391
SM Investments Corp.		42,835		750,491
SM Prime Holdings, Inc.		373,812		272,807
				1,454,689
Republic of Korea — 6.7%
LG Chem Ltd.		1,833		794,707
NAVER Corp.		1,552		433,975

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

	Number of Shares		Value
Samsung Biologics Co. Ltd. (c) (e)		1,654	$	1,124,655
Samsung Electronics Co. Ltd.		28,259		1,614,370
				3,967,707
Russia — 0.0%
Novatek PJSC (a) (b)		12,096		—
Polyus PJSC (a) (b) (c)		1,977		—
Polyus PJSC GDR (a) (b) (e)		1,904		—
Polyus PJSC GDR (a) (b)		40		—
Sberbank of Russia PJSC (a) (b)		7,525		—
				—
South Africa — 1.0%
FirstRand Ltd. (f)		115,061		607,567
Switzerland — 3.2%
Cie Financiere Richemont SA Registered		14,880		1,887,506
Taiwan — 11.0%
MediaTek, Inc.		25,000		779,472
Taiwan Semiconductor Manufacturing Co. Ltd.		278,000		5,747,493
				6,526,965
Turkey — 0.1%
Akbank TAS		121,726		60,200
United Kingdom — 0.5%
Prudential PLC		19,250		276,890
United States — 3.4%
Yum China Holdings, Inc.		49,104		2,039,780
TOTAL COMMON STOCK (Cost $59,995,807)				56,125,202
PREFERRED STOCK — 1.3%
Brazil — 1.3%
Banco Bradesco SA 3.340%
		164,338		766,972
TOTAL PREFERRED STOCK (Cost $651,484)				766,972
TOTAL EQUITIES (Cost $60,647,291)				56,892,174
WARRANTS — 0.0%
Switzerland — 0.0%
Cie Financiere Richemont SA, Expires 11/22/23, Strike 67.00 (c)		22,580		17,838
TOTAL WARRANTS (Cost $0)				17,838
RIGHTS — 0.0%
Republic of Korea — 0.0%
Samsung Biologics Co. Ltd. (b) (c)		99		16,254

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

	Number of Shares		Value
TOTAL RIGHTS (Cost $0)			$	16,254
TOTAL LONG-TERM INVESTMENTS (Cost $60,647,291)				56,926,266
	Principal Amount
SHORT-TERM INVESTMENTS — 3.9%
Repurchase Agreement — 3.9%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/22, 0.000%, due 4/01/22 (g)	$	2,303,771	$	2,303,771
TOTAL SHORT-TERM INVESTMENTS (Cost $2,303,771)				2,303,771
TOTAL INVESTMENTS — 99.8% (Cost $62,951,062) (h)				59,230,037
Other Assets/(Liabilities) — 0.2%				121,586
NET ASSETS — 100.0%			$	59,351,623

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) Investment was valued using significant unobservable inputs.

(b) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At March 31, 2022, these securities amounted to a value of $1,178,874 or 1.99% of net assets.

(c) Non-income producing security.

(d) Restricted security. Certain securities are restricted as to resale. At March 31, 2022, these securities amounted to a value of $1,119,300 or 1.89% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

(e) 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, 2022, the aggregate market value of these securities amounted to $2,912,682 or 4.91% of net assets.

(f) Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2022, was $483,001 or 0.81% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $519,871 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

(g) Maturity value of $2,303,771. Collateralized by U.S. Government Agency obligations with a rate of 0.375%, maturity date of 9/15/24, and an aggregate market value, including accrued interest, of $2,349,866.

(h) 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, 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 15 series, including the following 14 series listed below (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 iShares^® 60/40 Allocation Fund (“iShares 60/40 Allocation Fund”)

MML iShares^® 80/20 Allocation Fund (“iShares 80/20 Allocation 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 Conservative Allocation Fund, MML Balanced Allocation Fund, MML Moderate Allocation Fund, MML Growth Allocation Fund, and MML Aggressive Allocation Fund, 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.

The Blend Fund, iShares 60/40 Allocation Fund, and iShares 80/20 Allocation Fund invest substantially all of their investable assets in shares of ETFs advised by an affiliate of the Fund’s subadviser, BlackRock Investment Management, LLC (“Underlying ETFs”).

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 indexes 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, iShares 60/40 Allocation Fund, iShares 80/20 Allocation 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, 2022. 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, 2022, for the remaining Funds' investments:

Dynamic Bond Fund

Asset Investments	Level 1		Level 2			Level 3		Total
Bank Loans (Less Unfunded Loan Commitments)	$	—	$	13,213,514		$	—	$	13,213,514
Corporate Debt		—		69,302,911			—		69,302,911
Municipal Obligations		—		281,741			—		281,741
Non-U.S. Government Agency Obligations		—		74,190,964			—		74,190,964
Sovereign Debt Obligations		—		4,456,619			—		4,456,619
U.S. Government Agency Obligations and Instrumentalities		—		34,242,783			—		34,242,783
U.S. Treasury Obligations		—		62,147,555			—		62,147,555
Mutual Funds		5,687,585		2,264,805			—		7,952,390
Short-Term Investments		—		16,054,280			—		16,054,280
Unfunded Loan Commitments**		—		(671	)		—		(671	)
Total Investments	$	5,687,585	$	276,154,501		$	—	$	281,842,086

Notes to Portfolio of Investments (Unaudited) (Continued)

Equity Fund

Asset Investments	Level 1		Level 2			Level 3		Total
Common Stock	$	877,402,671	$	6,585,764	*	$	—	$	883,988,434
Preferred Stock		348,729		—			—		348,729
Mutual Funds		12,864,975		—			—		12,864,975
Short-Term Investments		4,757,085		5,364,477			—		10,121,563
Total Investments	$	895,373,460	$	11,950,241		$	—	$	907,323,701

Notes to Portfolio of Investments (Unaudited) (Continued)

Equity Rotation Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock	$	49,296,479	$	—	$	9,829	$	49,306,308
Mutual Funds		26,398		—		—		26,398
Total Investments	$	49,322,877	$	—	$	9,829	$	49,332,706

Notes to Portfolio of Investments (Unaudited) (Continued)

High Yield Fund

Asset Investments	Level 1		Level 2		Level 3			Total
Common Stock	$	511,979	$	—	$	—	+	$	511,979
Bank Loans		—		2,088,184		—			2,088,184
Corporate Debt		—		64,152,052		—			64,152,052
Mutual Funds		4,829,550		—		—			4,829,550
Short-Term Investments		—		3,819,989		—			3,819,989
Total Investments	$	5,341,529	$	70,060,225	$	—		$	75,401,754

Notes to Portfolio of Investments (Unaudited) (Continued)

Inflation-Protected and Income Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Non-U.S. Government Agency Obligations	$	—		$	147,978,118		$	—	$	147,978,118
U.S. Government Agency Obligations and Instrumentalities		—			31,088,339			—		31,088,339
U.S. Treasury Obligations		—			75,118,870			—		75,118,870
Purchased Options		—			1,890,498			—		1,890,498
Mutual Funds		2,716,698			—			—		2,716,698
Short-Term Investments		—			14,825,913			—		14,825,913
Total Investments	$	2,716,698		$	270,901,738		$	—	$	273,618,436
Asset Derivatives
Futures Contracts		128,089			—			—		128,089
Swap Agreements		—			736,510			—		736,510
Total	$	128,089		$	736,510		$	—	$	864,599
Liability Derivatives
Futures Contracts		(157,256	)		—			—		(157,256	)
Swap Agreements		—			(2,936,369	)		—		(2,936,369	)
Total	$	(157,256	)	$	(2,936,369	)	$	—	$	(3,093,625	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Managed Bond Fund

Asset Investments	Level 1			Level 2		Level 3		Total
Corporate Debt	$	—		$	338,588,717	$	—	$	338,588,717
Non-U.S. Government Agency Obligations		—			244,803,205		—		244,803,205
Sovereign Debt Obligations		—			9,281,122		—		9,281,122
U.S. Government Agency Obligations and Instrumentalities		—			216,429,158		—		216,429,158
U.S. Treasury Obligations		—			100,701,838		—		100,701,838
Purchased Options		—			3,116,111		—		3,116,111
Mutual Funds		2,279,145			—		—		2,279,145
Short-Term Investments		—			164,787,875		—		164,787,875
Total Investments	$	2,279,145		$	1,077,708,026	$	—	$	1,079,987,171
Asset Derivatives
Futures Contracts	$	310,650		$	—	$	—	$	310,650
Liability Derivatives
Futures Contracts	$	(3,021,226	)	$	—	$	—	$	(3,021,226	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Short-Duration Bond Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Corporate Debt	$	—		$	79,328,697		$	—	$	79,328,697
Non-U.S. Government Agency Obligations		—			64,057,285			—		64,057,285
U.S. Government Agency Obligations and Instrumentalities		—			2,109,282			—		2,109,282
U.S. Treasury Obligations		—			686,402			—		686,402
Purchased Options		—			143,774			—		143,774
Mutual Funds		324,515			—			—		324,515
Short-Term Investments		—			7,451,706			—		7,451,706
Total Investments	$	324,515		$	153,777,146		$	—	$	154,101,661
Asset Derivatives
Futures Contracts		1,341,468			—			—		1,341,468
Liability Derivatives
Futures Contracts		(28,141	)		—			—		(28,141	)
Swap Agreements		—			(4,120,260	)		—		(4,120,260	)
Total	$	(28,141	)	$	(4,120,260	)	$	—	$	(4,148,401	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Strategic Emerging Markets Fund

Asset Investments	Level 1		Level 2		Level 3			Total
Common Stock*
Bermuda	$	68,404	$	—	$	—		$	68,404
Brazil		2,535,102		—		14,586			2,549,688
Cayman Islands		6,238,186		5,684,097		—			11,922,283
China		—		42,512		—			42,512
Cyprus		—		—		-—			—
Egypt		—		237,906		—			237,906
France		—		2,465,204		—			2,465,204
Hong Kong		—		3,047,695		—			3,047,695
India		—		11,699,345		—			11,699,345
Indonesia		—		555,203		—			555,203
Italy		—		836,732		—			836,732
Luxembourg		—		167,472		—			167,472
Mexico		5,711,454		—		—			5,711,454
Netherlands		—		—		—			—
Philippines		—		1,454,689		—			1,454,689
Republic of Korea		—		3,967,707		—			3,967,707
Russia		—		—		—	+		—
South Africa		—		607,567		—			607,567
Switzerland		—		1,887,506		—			1,887,506
Taiwan		—		6,526,965		—			6,526,965
Turkey		—		60,200		—			60,200
United Kingdom		—		276,890		—			276,890
United States		2,039,780		—		—			2,039,780
Preferred Stock
Brazil		766,972		—		—			766,972
Warrants		17,838		—		—			17,838
Rights		—		16,254		—			16,254
Short-Term Investments		—		2,303,771		—			2,303,771
Total Investments	$	17,377,736	$	41,837,715	$	14,586		$	59,230,037

* 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, 2022.

Notes to Portfolio of Investments (Unaudited) (Continued)

Derivative Instruments

Derivatives are financial instruments whose values are based on the values of one or more underlying 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 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, 2022, the Funds' collateral was equal to or greater than 100% of the market value of securities on loan and all of the Funds' cash collateral was invested in the State Street Navigator Securities Lending Government Money Market Portfolio.

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.

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, except for the Blend Fund, iShares 60/40 Allocation Fund, and iShares 80/20 Allocation Fund, may also invest in foreign securities. In addition, certain Underlying ETFs may invest in foreign securities. Foreign securities, including American Depositary Receipts, are subject to additional risks compared to securities of U.S. issuers, including international trade, currency, political, regulatory, and diplomatic risks. In addition, fluctuations in currency exchange rates may adversely affect the values of foreign securities and the price of a Fund’s shares. Emerging markets securities are subject to greater risks than securities issued in developed foreign markets, including less liquidity, greater price volatility, higher relative rates of inflation, greater political, economic, and social instability, greater custody and operational risks, and greater volatility in currency exchange rates.

Federal Income Tax

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

Dividends and Distributions to Shareholders

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

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

Notes to Portfolio of Investments (Unaudited) (Continued)

3. Federal Income Tax Information

At March 31, 2022, the aggregate cost of investments and the unrealized appreciation (depreciation) in the value of all investments owned by the Fund(s), as computed on a federal income tax basis, were as follows:

	Federal Income Tax Cost		Tax Basis Unrealized Appreciation		Tax Basis Unrealized (Depreciation)			Net Unrealized Appreciation (Depreciation)
Blend Fund	$	743,979,226	$	90,733,702	$	(27,656,502	)	$	63,077,200
Dynamic Bond Fund		299,412,793		1,730,219		(19,300,926	)		(17,570,707	)
Equity Fund		704,081,704		209,294,708		(6,052,711	)		203,241,997
Equity Momentum Fund		44,511,773		2,083,104		(553,170	)		1,529,934
Equity Rotation Fund		49,451,673		2,615,005		(2,733,972	)		(118,967	)
High Yield Fund		77,053,031		1,482,506		(3,133,783	)		(1,651,277	)
Inflation-Protected and Income Fund		277,375,596		1,837,036		(5,594,196	)		(3,757,160	)
iShares 60/40 Allocation Fund		27,442,165		41,872		(387,624	)		(345,752	)
iShares 80/20 Allocation Fund		30,389,737		105,813		(342,885	)		(237,072	)
Managed Bond Fund		1,117,948,232		6,542,880		(44,503,941	)		(37,961,061	)
Short-Duration Bond Fund		160,631,144		1,049,494		(7,578,977	)		(6,529,483	)
Small Cap Equity Fund		94,975,456		49,922,529		(5,414,869	)		44,507,660
Special Situations Fund		36,422,355		3,997,353		(8,236,674	)		(4,239,321	)
Strategic Emerging Markets Fund		62,951,062		8,275,264		(11,996,289	)		(3,721,025	)

4. New Accounting Pronouncements

In January 2021, FASB issued Accounting Standards Update 2021-01 — Reference Rate Reform (Topic 848) — Scope (“ASU 2021-01”) as an update to Accounting Standards Update 2020-04 — Reference Rate Reform (Topic 848) — Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”) in order to make certain clarifications. ASU 2020-04 and ASU 2021-01 provide 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. The temporary relief provided by ASU 2020-04 and ASU 2021-01 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 and ASU 2021-01 will have a material impact on the financial statements.

Notes to Portfolio of Investments (Unaudited) (Continued)

5. Coronavirus (COVID-19) Pandemic

The global pandemic outbreak of the novel coronavirus known as COVID-19 and efforts to contain its spread have produced, and will likely continue to produce, substantial market volatility, severe market dislocations and liquidity constraints in many markets, exchange trading suspensions and closures, higher default rates, and global business disruption, and they may result in future significant adverse effects, such as declines in global financial markets 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.

6. Russia-Ukraine War

In February 2022, Russia commenced a large-scale military attack on Ukraine. The outbreak of hostilities between the two countries could result in more widespread conflict and could have a severe adverse effect on the regional and the global financial markets and economies. One or more of the Funds hold positions in securities or other instruments that are economically tied to Russia. Investments in Russia are subject to political, economic, legal, market, and currency risks, as well as the risks related to the economic sanctions on Russia, Russian individuals, and Russian corporate and banking entities imposed by the United States and/or other countries. Such sanctions — which affect companies in many sectors, including energy, financial services, and defense, among others — could adversely affect the global energy and financial markets and, thus, could affect the value of a Fund’s investments, even beyond any direct exposure the Fund may have to Russian issuers or the adjoining geographic regions. Such sanctions may also result in a decline in the value and liquidity of Russian securities and a weakening of the ruble, and will impair a Fund's ability to buy, sell, receive, or deliver Russian securities. In addition, certain transactions have been or may be prohibited and/or existing investments have or may become illiquid (e.g., because transacting in certain existing investments is prohibited), which could cause a Fund to sell other portfolio holdings at a disadvantageous time or price in order to meet shareholder redemptions.