MassMutual Equity Opports I (MFVZX) NPORT-P MassMutual Select T. Rowe Price Retirement 2020 Fund (Jun 2024 report)

MassMutual Total Return Bond Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 102.6%
BANK LOANS — 1.3%
Aerospace & Defense — 0.0%
TransDigm, Inc., 2024 Term Loan I, 3 mo. USD Term SOFR + 2.750%
8.085% VRN 8/24/28	$	204,935	$	205,235
Beverages — 0.1%
City Brewing Co. LLC
Closing Date Term Loan, 3 mo. USD Term SOFR + 3.500%
9.090% VRN 4/05/28		244,994		161,899
2024 First Lien Second Out PIK TL, 1 mo. USD Term SOFR + 3.500%
10.590% VRN 4/05/28		41,380		32,690
Naked Juice LLC
Term Loan, 1 mo. USD Term SOFR + 3.250%, 3 mo. USD Term SOFR + 3.250%
8.685% - 8.694% VRN 1/24/29		386,201		357,537
2nd Lien Term Loan, 3 mo. USD Term SOFR + 6.000%
11.435% VRN 1/24/30		68,440		54,600
Triton Water Holdings, Inc., Term Loan, 3 mo. USD Term SOFR + 3.250%
8.846% VRN 3/31/28		67,385		67,385
				674,111
Chemicals — 0.0%
Chemours Co., 2023 USD Term Loan B, 1 mo. USD Term SOFR + 3.500%
8.844% VRN 8/18/28		166,607		165,774
Mativ Holdings, Inc., Delayed Draw Term Loan A, 1 mo. USD Term SOFR + 2.500%
7.944% VRN 5/06/27		44,880		44,319
				210,093
Commercial Services — 0.1%
Element Materials Technology Group US Holdings Inc.
2022 USD Delayed Draw Term Loan, 3 mo. USD Term SOFR + 4.250%
9.685% VRN 7/06/29		22,036		22,101
2022 USD Term Loan, 3 mo. USD Term SOFR + 4.250%
9.685% VRN 7/06/29		47,745		47,884
GTCR W Merger Sub LLC, USD Term Loan B, 3 mo. USD Term SOFR + 3.000%
8.335% VRN 1/31/31		166,159		166,136
Pre-Paid Legal Services, Inc., 2021 Term Loan, 1 mo. USD Term SOFR + 3.750%
9.208% VRN 12/15/28		102,239		102,063
Spin Holdco, Inc., 2021 Term Loan, 3 mo. USD Term SOFR + 4.000%
9.600% VRN 3/04/28		227,442		192,757
Trans Union LLC 2024 Term Loan B8, 1 mo. USD Term SOFR + 1.750%
7.094% VRN 6/24/31		24,003		23,937

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
2024 Term Loan B7, 1 mo. USD Term SOFR + 2.000%
7.344% VRN 12/01/28	$	81,114	$	81,070
TruGreen Ltd. Partnership, 2020 Term Loan, 1 mo. USD Term SOFR + 4.000%
9.444% VRN 11/02/27		56,318		54,178
				690,126
Computers — 0.0%
Amentum Government Services Holdings LLC, Term Loan B, 1 mo. USD Term SOFR + 4.000%
9.458% VRN 1/29/27		68,098		68,184
Peraton Corp., Term Loan B, 1 mo. USD Term SOFR + 3.750%
9.194% VRN 2/01/28		218,214		218,122
				286,306
Cosmetics & Personal Care — 0.0%
Prestige Brands, Inc., 2021 Term Loan B5, 1 mo. USD Term SOFR + 2.000%
7.458% VRN 7/03/28		79,545		79,728
Distribution & Wholesale — 0.0%
Patriot Container Corp., 2018 1st Lien Term Loan, 1 mo. USD Term SOFR + 3.750%
9.194% VRN 3/20/25		34,282		33,308
Diversified Financial Services — 0.1%
Avolon TLB Borrower 1 (US) LLC, 2023 Term Loan B6, 1 mo. USD Term SOFR + 2.000%
7.339% VRN 6/22/28		146,745		146,883
Deerfield Dakota Holding LLC, 2020 USD Term Loan B, 3 mo. USD Term SOFR + 3.750%
9.085% VRN 4/09/27		138,786		138,612
Jane Street Group LLC, 2024 Term Loan B, 1 mo. USD Term SOFR + 2.500%
7.958% VRN 1/26/28		133,776		133,593
				419,088
Engineering & Construction — 0.0%
Artera Services LLC, 2024 Term Loan, 3 mo. USD Term SOFR + 4.500%
9.835% VRN 2/15/31		92,739		93,070
Entertainment — 0.1%
Caesars Entertainment, Inc., 2024 Term Loan B1, 3 mo. USD Term SOFR + 2.750%
8.097% VRN 2/06/31		163,359		163,205
Churchill Downs, Inc., 2021 Incremental Term Loan B1, 1 mo. USD Term SOFR + 2.000%
7.444% VRN 3/17/28		98,725		98,848
PENN Entertainment, Inc., 2022 Term Loan B, 1 mo. USD Term SOFR + 2.750%
8.194% VRN 5/03/29		52,136		52,158
William Morris Endeavor Entertainment LLC, 2018 1st Lien Term Loan, 1 mo. USD Term SOFR + 2.750%
8.208% VRN 5/18/25		216,045		216,199
				530,410

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Environmental Controls — 0.0%
Clean Harbors, Inc., 2023 Term Loan, 1 mo. USD Term SOFR + 1.750%
7.208% VRN 10/08/28	$	160,942	$	161,579
Food — 0.0%
8th Avenue Food & Provisions, Inc., 2018 1st Lien Term Loan, 1 mo. USD Term SOFR + 3.750%
9.208% VRN 10/01/25		17,178		16,266
Froneri International Ltd., 2020 USD Term Loan, 1 mo. USD Term SOFR + 2.250%
7.694% VRN 1/29/27		81,488		81,402
United Natural Foods, Inc., 2024 Term Loan, 1 mo. USD Term SOFR + 4.750%
10.094% VRN 5/01/31		141,308		141,308
				238,976
Health Care - Products — 0.1%
Bausch & Lomb Corp., Term Loan, 1 mo. USD Term SOFR + 3.250%
8.689% VRN 5/10/27		153,341		151,577
Carestream Dental Equipment, Inc.
2017 1st Lien Term Loan, 1 mo. USD LIBOR + 3.250%
8.708% VRN 9/01/24		135,410		116,452
2021 Term Loan, 1 mo. USD Term SOFR + 4.500%
9.944% VRN 9/01/24		41,358		34,017
Medline Borrower LP, 2024 Term Loan B, 1 mo. USD Term SOFR + 2.750%
8.094% VRN 10/23/28		93,495		93,621
				395,667
Health Care - Services — 0.1%
Modivcare, Inc., 2024 Term Loan B, 3 mo. USD Term SOFR + 4.750%
10.085% VRN 6/20/31		322,158		314,105
Star Parent, Inc., Term Loan B, 3 mo. USD Term SOFR + 3.750%
9.085% VRN 9/27/30		85,405		85,278
				399,383
Home Furnishing — 0.0%
AI Aqua Merger Sub, Inc., 2021 1st Lien Term Loan B, 1 mo. USD Term SOFR + 4.000%
9.329% VRN 7/31/28		97,121		97,237
Insurance — 0.1%
Acrisure LLC, 2024 Term Loan B1, 3 mo. USD Term SOFR + 3.000%
8.344% VRN 2/15/27		218,163		218,163
AmWINS Group, Inc., 2021 Term Loan B, 1 mo. USD Term SOFR + 2.250%
7.594% VRN 2/19/28		433,980		433,407
Asurion LLC
2020 Term Loan B8, 1 mo. USD Term SOFR + 3.250%
8.708% VRN 12/23/26		285,210		282,595
2022 Term Loan B10, 1 mo. USD Term SOFR + 4.000%
9.444% VRN 8/19/28		130,417		128,827
				1,062,992
Internet — 0.1%
Arches Buyer, Inc., 2021 Term Loan B, 1 mo. USD Term SOFR + 3.250%
8.694% VRN 12/06/27		63,923		61,066

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Buzz Finco LLC, Term Loan B, 1 mo. USD Term SOFR + 2.750%
8.194% VRN 1/29/27	$	61,772	$	61,746
Gen Digital, Inc., 2021 Term Loan A, 1 mo. USD Term SOFR + 1.500%
6.944% VRN 9/10/27		184,486		184,198
Magnite, Inc., 2024 Term Loan B, 1 mo. USD Term SOFR + 4.500%, 3 mo. USD Term SOFR + 4.500%, 6 mo. USD Term SOFR + 4.500%
9.596% - 9.844% VRN 2/06/31		37,386		37,495
Match Group, Inc., 2020 Term Loan B, 3 mo. USD Term SOFR + 1.750%
7.244% VRN 2/13/27		27,175		27,107
MH Sub I LLC, 2023 Term Loan, 1 mo. USD Term SOFR + 4.250%
9.594% VRN 5/03/28		44,037		43,964
Research Now Group, Inc., 2017 1st Lien Term Loan, 3 mo. USD Term SOFR + 5.500%
11.068% VRN 12/20/24		72,546		53,845
				469,421
Media — 0.1%
Charter Communications Operating LLC, 2019 Term Loan B2, 1 mo. USD Term SOFR + 1.750%
7.052% VRN 2/01/27		95,489		95,351
CSC Holdings LLC, 2019 Term Loan B5, 1 mo. USD LIBOR + 2.500%
7.943% VRN 4/15/27		112,193		92,980
Telenet Financing USD LLC, 2020 USD Term Loan AR, 1 mo. USD Term SOFR + 2.000%
7.443% VRN 4/30/28		65,220		61,946
Virgin Media Bristol LLC, USD Term Loan N, 1 mo. USD Term SOFR + 2.500%
7.943% VRN 1/31/28		129,989		124,109
				374,386
Packaging & Containers — 0.1%
Berry Global, Inc., 2023 Term Loan AA, 1 mo. USD Term SOFR + 1.750%
7.191% VRN 7/01/29		568,795		568,960
Pharmaceuticals — 0.1%
Gainwell Acquisition Corp., Term Loan B, 3 mo. USD Term SOFR + 4.000%
9.435% VRN 10/01/27		219,318		212,098
Jazz Financing Lux SARL, 2024 Term Loan B, 1 mo. USD Term SOFR + 3.000%
8.458% VRN 5/05/28		302,373		302,373
				514,471
Real Estate Investment Trusts (REITS) — 0.0%
Invitation Homes Operating Partnership LP, 2020 Term Loan A, 1 mo. USD Term SOFR + 1.000%
6.444% VRN 1/31/25		83,792		83,007
Retail — 0.0%
1011778 B.C. Unlimited Liability Co., 2024 Term Loan B6, 1 mo. USD Term SOFR + 1.750%
7.094% VRN 9/20/30		140,636		140,131
KFC Holding Co., 2021 Term Loan B, 1 mo. USD Term SOFR + 1.750%
7.196% VRN 3/15/28		100,094		99,950

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Whatabrands LLC, 2024 Term Loan B, 1 mo. USD Term SOFR + 2.750%
8.094% VRN 8/03/28	$	64,838	$	64,821
				304,902
Software — 0.1%
Athenahealth Group, Inc., 2022 Term Loan B, 1 mo. USD Term SOFR + 3.250%
8.594% VRN 2/15/29		37,910		37,744
Central Parent, Inc., 2024 Term Loan B, 3 mo. USD Term SOFR + 3.250%
8.585% VRN 7/06/29		100,000		98,488
DTI Holdco, Inc., 2022 Term Loan, 1 mo. USD Term SOFR + 4.750%
10.094% VRN 4/26/29		22,676		22,745
EagleView Technology Corp., 2018 Add On Term Loan B, 3 mo. USD Term SOFR + 3.500%
9.097% VRN 8/14/25		204,042		195,540
Iron Mountain, Inc., 2023 Term Loan B, 1 mo. USD Term SOFR + 2.250%
7.594% VRN 1/31/31		68,815		68,442
Renaissance Holding Corp., 2024 Term Loan, 3 mo. USD Term SOFR + 4.250%
9.597% VRN 4/05/30		81,551		81,436
				504,395
Telecommunications — 0.1%
Altice France SA, 2023 USD Term Loan B14, 3 mo. USD Term SOFR + 5.500%
10.829% VRN 8/15/28		85,069		62,243
CCI Buyer, Inc., Term Loan, 3 mo. USD Term SOFR + 4.000%
9.335% VRN 12/17/27		74,425		74,448
Frontier Communications Corp., 2021 1st Lien Term Loan, 1 mo. USD Term SOFR + 3.750%
9.208% VRN 10/08/27		155,774		155,502
SBA Senior Finance II LLC, 2024 Term Loan B, 1 mo. USD Term SOFR + 2.000%
7.350% VRN 1/25/31		230,689		230,834
Zayo Group Holdings, Inc., USD Term Loan, 1 mo. USD Term SOFR + 3.000%
8.458% VRN 3/09/27		283,790		246,307
				769,334
TOTAL BANK LOANS (Cost $9,248,549)				9,166,185
CORPORATE DEBT — 17.7%
Aerospace & Defense — 0.2%
Boeing Co.
5.805% 5/01/50		860,000		775,032
6.528% 5/01/34 (a)		405,000		414,679
				1,189,711
Agriculture — 0.3%
BAT Capital Corp.
5.650% 3/16/52		495,000		441,941
Imperial Brands Finance PLC
3.875% 7/26/29 (a)		50,000		46,308
6.125% 7/27/27 (a)		690,000		701,973

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Philip Morris International, Inc.
1.450% 8/01/39 EUR (b)	$	255,000	$	182,099
Reynolds American, Inc.
5.850% 8/15/45		1,160,000		1,069,904
				2,442,225
Banks — 4.9%
Bank of America Corp.
1 day USD SOFR + 1.370% 1.922% VRN 10/24/31		120,000		98,173
1 day USD SOFR + 1.060% 2.087% VRN 6/14/29		2,270,000		2,013,817
1 day USD SOFR + 1.050% 2.551% VRN 2/04/28		2,311,000		2,156,947
1 day USD SOFR + 2.150% 2.592% VRN 4/29/31		290,000		250,739
3 mo. USD Term SOFR + 1.837% 3.824% VRN 1/20/28		2,564,000		2,471,275
3 mo. USD Term SOFR + 1.332% 3.970% VRN 3/05/29		920,000		879,651
Citigroup, Inc.
1 day USD SOFR + 0.770% 1.462% VRN 6/09/27		50,000		46,341
1 day USD SOFR + 1.167% 2.561% VRN 5/01/32		325,000		270,841
1 day USD SOFR + 1.422% 2.976% VRN 11/05/30		500,000		445,332
1 day USD SOFR + 1.351% 3.057% VRN 1/25/33		470,000		399,222
Goldman Sachs Group, Inc.
1 day USD SOFR + 0.798% 1.431% VRN 3/09/27		2,295,000		2,141,452
1 day USD SOFR + 0.818% 1.542% VRN 9/10/27		485,000		445,450
1 day USD SOFR + 0.913% 1.948% VRN 10/21/27		1,550,000		1,431,318
1 day USD SOFR + 0.486% 5.844% FRN 10/21/24		895,000		895,099
HSBC Holdings PLC
1 day USD SOFR + 1.732% 2.013% VRN 9/22/28		155,000		139,201
1 day USD SOFR + 1.929% 2.099% VRN 6/04/26		1,480,000		1,430,865
1 day USD SOFR + 1.285% 2.206% VRN 8/17/29		265,000		232,952
JP Morgan Chase & Co.
1 day USD SOFR + 0.605% 1.561% VRN 12/10/25		1,890,000		1,854,871
1 day USD SOFR + 0.885% 1.578% VRN 4/22/27		1,320,000		1,231,835
1 day USD SOFR + 1.015% 2.069% VRN 6/01/29		885,000		787,258
1 day USD SOFR + 1.180% 2.545% VRN 11/08/32		190,000		158,210
3 mo. USD Term SOFR + 1.250% 2.580% VRN 4/22/32		525,000		443,410
3 mo. USD Term SOFR + 1.510% 2.739% VRN 10/15/30		540,000		477,786
3 mo. USD Term SOFR + 1.382% 4.005% VRN 4/23/29		410,000		392,026
1 day USD SOFR + 1.310% 5.012% VRN 1/23/30		315,000		312,584
Lloyds Banking Group PLC
1 yr. CMT + 0.850% 1.627% VRN 5/11/27		315,000		292,619
3 mo. USD LIBOR + 1.205% 3.574% VRN 11/07/28		25,000		23,518
1 yr. CMT + 3.500% 3.870% VRN 7/09/25		415,000		414,811
Morgan Stanley
1 day USD SOFR + 0.560% 1.164% VRN 10/21/25		2,885,000		2,843,339
1 day USD SOFR + 0.879% 1.593% VRN 5/04/27		910,000		848,357
1 day USD SOFR + 1.178% 2.239% VRN 7/21/32		290,000		236,903
PNC Financial Services Group, Inc.
1 day USD SOFR + 1.902% 5.676% VRN 1/22/35		130,000		130,698
1 day USD SOFR Index + 2.140% 6.037% VRN 10/28/33		855,000		880,880
1 day USD SOFR + 2.284% 6.875% VRN 10/20/34		130,000		141,683
Santander UK Group Holdings PLC
1 yr. CMT + 1.250% 1.532% VRN 8/21/26		295,000		280,750
1 day USD SOFR + 0.989% 1.673% VRN 6/14/27		340,000		314,308
1 day USD SOFR + 1.220% 2.469% VRN 1/11/28		285,000		262,932
US Bancorp
1 day USD SOFR + 1.600% 4.839% VRN 2/01/34		935,000		886,416
1 day USD SOFR + 2.260% 5.836% VRN 6/12/34		80,000		81,112
1 day USD SOFR + 2.090% 5.850% VRN 10/21/33		585,000		594,105
Wells Fargo & Co.

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
1 day USD SOFR + 2.100% 2.393% VRN 6/02/28	$	1,280,000	$	1,178,865
1 day USD SOFR + 1.500% 3.350% VRN 3/02/33		1,400,000		1,214,088
1 day USD SOFR + 1.510% 3.526% VRN 3/24/28		1,055,000		1,006,309
1 day USD SOFR + 2.100% 4.897% VRN 7/25/33		795,000		764,682
1 day USD SOFR + 1.740% 5.574% VRN 7/25/29		1,075,000		1,084,753
				34,887,783
Chemicals — 0.3%
International Flavors & Fragrances, Inc.
1.832% 10/15/27 (a)		85,000		75,891
2.300% 11/01/30 (a)		1,860,000		1,550,738
3.268% 11/15/40 (a)		350,000		247,486
4.375% 6/01/47		230,000		177,125
				2,051,240
Commercial Services — 0.1%
Adtalem Global Education, Inc.
5.500% 3/01/28 (a)		185,000		177,952
Global Payments, Inc.
4.875% 3/17/31 EUR (b)		370,000		409,229
Worldline SA
4.125% 9/12/28 EUR (a) (b)		400,000		424,642
				1,011,823
Diversified Financial Services — 0.5%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust
3.000% 10/29/28		640,000		581,613
Air Lease Corp.
3.250% 3/01/25		950,000		933,236
5.850% 12/15/27		505,000		511,320
Avolon Holdings Funding Ltd.
2.528% 11/18/27 (a)		859,000		772,596
2.875% 2/15/25 (a)		45,000		44,086
4.375% 5/01/26 (a)		815,000		792,781
Discover Financial Services
3.950% 11/06/24		150,000		149,037
				3,784,669
Electric — 2.0%
Amprion GmbH
0.625% 9/23/33 EUR (a) (b)		100,000		81,330
Duke Energy Carolinas LLC
3.700% 12/01/47		738,000		542,083
Duke Energy Corp.
3.750% 4/01/31 EUR (b)		705,000		744,639
Duke Energy Florida LLC
5.875% 11/15/33		195,000		202,727
Duke Energy Progress LLC
5.100% 3/15/34		495,000		490,915
5.250% 3/15/33		875,000		872,383
Entergy Louisiana LLC
3.780% 4/01/25		1,250,000		1,228,567
Eversource Energy
4.600% 7/01/27		735,000		719,758
5.950% 2/01/29		835,000		853,289

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
FirstEnergy Pennsylvania Electric Co.
4.000% 4/15/25 (a)	$	985,000	$	969,309
FirstEnergy Transmission LLC
2.866% 9/15/28 (a)		1,401,000		1,279,452
MidAmerican Energy Co.
4.400% 10/15/44		1,000,000		849,531
MVM Energetika Zrt
6.500% 3/13/31 (a)		250,000		250,703
Public Service Co. of Colorado
5.250% 4/01/53		770,000		703,623
Southwestern Electric Power Co.
3.250% 11/01/51		425,000		267,416
5.300% 4/01/33		1,400,000		1,356,431
TenneT Holding BV
2.750% 5/17/42 EUR (a) (b)		515,000		479,431
4.500% 10/28/34 EUR (a) (b)		325,000		370,885
4.750% 10/28/42 EUR (a) (b)		185,000		215,352
Wisconsin Power & Light Co.
4.950% 4/01/33		1,535,000		1,485,200
				13,963,024
Electronics — 0.1%
Honeywell International, Inc.
3.750% 3/01/36 EUR (b)		545,000		573,977
4.125% 11/02/34 EUR (b)		205,000		224,257
				798,234
Engineering & Construction — 0.0%
Artera Services LLC
8.500% 2/15/31 (a)		195,000		200,752
Entertainment — 0.5%
Everi Holdings, Inc.
5.000% 7/15/29 (a)		85,000		83,620
Warnermedia Holdings, Inc.
5.050% 3/15/42		1,760,000		1,431,600
5.141% 3/15/52		3,001,000		2,336,603
				3,851,823
Environmental Controls — 0.0%
Waste Pro USA, Inc.
5.500% 2/15/26 (a)		172,000		169,628
Food — 0.4%
ELO SACA
6.000% 3/22/29 EUR (a) (b)		600,000		630,875
JBS USA Holding Lux SARL/JBS USA Food Co./JBS Lux Co. SARL
6.500% 12/01/52		900,000		901,818
6.750% 3/15/34 (a)		1,073,000		1,137,496
Pilgrim's Pride Corp.
3.500% 3/01/32 (a)		500,000		425,220
				3,095,409
Gas — 0.4%
East Ohio Gas Co.
2.000% 6/15/30 (a)		995,000		824,442

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
KeySpan Gas East Corp.
5.819% 4/01/41 (a)	$	1,337,000	$	1,281,749
National Gas Transmission PLC
4.250% 4/05/30 EUR (a) (b)		375,000		408,381
				2,514,572
Health Care - Products — 0.1%
Embecta Corp.
5.000% 2/15/30 (a)		64,000		52,705
Medtronic Global Holdings SCA
3.375% 10/15/34 EUR (b)		300,000		315,191
				367,896
Health Care - Services — 0.6%
Aetna, Inc.
3.500% 11/15/24		500,000		495,936
Catalent Pharma Solutions, Inc.
3.500% 4/01/30 (a)		380,000		363,769
CommonSpirit Health
3.347% 10/01/29		65,000		59,664
HCA, Inc.
5.125% 6/15/39		650,000		602,087
5.250% 4/15/25		644,000		640,966
5.375% 9/01/26		590,000		588,528
Kedrion SpA
6.500% 9/01/29 (a)		565,000		516,622
ModivCare Escrow Issuer, Inc.
5.000% 10/01/29 (a)		853,000		601,102
ModivCare, Inc.
5.875% 11/15/25 (a)		150,000		152,204
				4,020,878
Household Products & Wares — 0.0%
Central Garden & Pet Co.
5.125% 2/01/28		22,000		21,397
Spectrum Brands, Inc.
3.875% 3/15/31 (a) (c)		61,000		50,979
				72,376
Insurance — 1.3%
Athene Global Funding
1.985% 8/19/28 (a)		1,185,000		1,031,510
3.205% 3/08/27 (a)		445,000		415,479
Farmers Exchange Capital II 3 mo. USD LIBOR + 3.744%
6.151% VRN 11/01/53 (a)		350,000		314,977
Farmers Exchange Capital III 3 mo. USD LIBOR + 3.454%
5.454% VRN 10/15/54 (a)		3,290,000		2,763,600
Metropolitan Life Global Funding I
5.150% 3/28/33 (a)		480,000		474,038
Teachers Insurance & Annuity Association of America 3 mo. USD LIBOR + 2.661%
4.375% VRN 9/15/54 (a)		4,000,000		3,982,077
				8,981,681

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Investment Companies — 0.1%
Icahn Enterprises LP/Icahn Enterprises Finance Corp.
9.000% 6/15/30 (a)	$	620,000	$	616,872
Lodging — 0.1%
Hyatt Hotels Corp.
1.800% 10/01/24		930,000		920,175
Machinery - Diversified — 0.0%
OT Merger Corp.
7.875% 10/15/29 (a)		250,000		112,500
Media — 1.1%
Cable One, Inc.
4.000% 11/15/30 (a) (c)		1,085,000		809,789
CCO Holdings LLC/CCO Holdings Capital Corp.
4.750% 3/01/30 (a)		80,000		69,290
Charter Communications Operating LLC/Charter Communications Operating Capital
3.700% 4/01/51		1,335,000		811,803
3.750% 2/15/28		500,000		464,707
3.900% 6/01/52		1,289,000		808,315
4.800% 3/01/50		375,000		275,095
4.908% 7/23/25		255,000		252,523
5.375% 4/01/38		5,000		4,354
5.375% 5/01/47		180,000		143,803
5.750% 4/01/48		1,088,000		909,619
CSC Holdings LLC
5.375% 2/01/28 (a)		100,000		75,977
5.750% 1/15/30 (a)		124,000		46,803
6.500% 2/01/29 (a)		1,067,000		778,784
7.500% 4/01/28 (a)		80,000		42,457
11.250% 5/15/28 (a)		200,000		174,177
11.750% 1/31/29 (a)		212,000		180,805
Time Warner Cable LLC
5.500% 9/01/41		875,000		728,687
5.875% 11/15/40		360,000		312,361
VZ Secured Financing BV
5.000% 1/15/32 (a)		970,000		827,091
				7,716,440
Mining — 0.0%
Corp. Nacional del Cobre de Chile
5.125% 2/02/33 (a)		200,000		190,427
Oil & Gas — 0.2%
Ecopetrol SA
8.875% 1/13/33		100,000		103,276
KazMunayGas National Co. JSC
4.750% 4/19/27 (a)		200,000		193,430
Occidental Petroleum Corp.
0.000% 10/10/36		115,000		61,900
4.500% 7/15/44		400,000		307,072
Pertamina Persero PT
3.100% 8/27/30 (a)		675,000		594,878
Petroleos Mexicanos
6.625% 6/15/35		700,000		532,218
				1,792,774

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Packaging & Containers — 0.4%
Ardagh Packaging Finance PLC/Ardagh Holdings USA, Inc.
4.125% 8/15/26 (a) (c)	$	120,000	$	104,156
5.250% 8/15/27 (a)		900,000		558,290
Berry Global, Inc.
1.650% 1/15/27		85,000		77,410
4.875% 7/15/26 (a)		273,000		268,055
5.500% 4/15/28		310,000		309,345
5.650% 1/15/34 (a)		570,000		556,724
Sealed Air Corp.
1.573% 10/15/26 (a)		1,200,000		1,092,623
				2,966,603
Pharmaceuticals — 0.8%
1375209 BC Ltd.
9.000% 1/30/28 (a) (c)		541,000		520,213
Bayer US Finance II LLC
4.375% 12/15/28 (a)		2,416,000		2,294,352
4.625% 6/25/38 (a)		1,310,000		1,100,782
Bayer US Finance LLC
6.875% 11/21/53 (a)		865,000		888,643
Grifols SA
3.875% 10/15/28 EUR (a) (b)		630,000		553,253
Johnson & Johnson
3.550% 6/01/44 EUR (b)		200,000		212,641
MSD Netherlands Capital BV
3.700% 5/30/44 EUR (b)		420,000		438,526
				6,008,410
Pipelines — 0.2%
Columbia Pipelines Operating Co. LLC
6.036% 11/15/33 (a)		65,000		66,425
Energy Transfer LP
4.950% 6/15/28		1,131,000		1,116,057
Galaxy Pipeline Assets Bidco Ltd.
2.160% 3/31/34 (a)		324,160		277,958
TransCanada PipeLines Ltd.
5.850% 3/15/36		50,000		50,334
				1,510,774
Real Estate — 0.3%
Annington Funding PLC
2.308% 10/06/32 GBP (a) (b)		220,000		214,065
3.184% 7/12/29 GBP (a) (b)		200,000		223,870
3.685% 7/12/34 GBP (a) (b)		200,000		209,465
Blackstone Property Partners Europe Holdings SARL
1.000% 5/04/28 EUR (a) (b)		225,000		212,119
1.625% 4/20/30 EUR (a) (b)		500,000		456,500
1.750% 3/12/29 EUR (a) (b)		350,000		330,464
LEG Immobilien SE
1.500% 1/17/34 EUR (a) (b)		100,000		83,816
Vonovia SE
0.750% 9/01/32 EUR (a) (b)		400,000		329,567
2.250% 4/07/30 EUR (a) (b)		100,000		97,359
				2,157,225

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Real Estate Investment Trusts (REITS) — 2.0%
American Assets Trust LP
3.375% 2/01/31	$	865,000	$	708,712
American Homes 4 Rent LP
3.625% 4/15/32		862,000		753,636
4.300% 4/15/52		350,000		271,294
American Tower Corp.
1.000% 1/15/32 EUR (b)		100,000		86,366
2.300% 9/15/31		1,050,000		856,654
2.700% 4/15/31		195,000		164,918
Crown Castle, Inc.
2.100% 4/01/31		1,277,000		1,034,149
Digital Intrepid Holding BV
0.625% 7/15/31 EUR (a) (b)		1,050,000		884,112
DOC DR LLC
4.300% 3/15/27		105,000		102,727
Extra Space Storage LP
2.400% 10/15/31		1,040,000		854,457
3.900% 4/01/29		670,000		630,840
GLP Capital LP/GLP Financing II, Inc.
3.250% 1/15/32		584,000		490,760
4.000% 1/15/31		380,000		340,687
5.375% 4/15/26		715,000		709,162
Healthcare Realty Holdings LP
2.050% 3/15/31		106,000		82,022
2.400% 3/15/30		615,000		506,815
3.100% 2/15/30		700,000		612,107
3.625% 1/15/28		157,000		145,105
Hudson Pacific Properties LP
3.250% 1/15/30		240,000		165,766
4.650% 4/01/29 (c)		1,295,000		997,325
5.950% 2/15/28		15,000		12,750
Invitation Homes Operating Partnership LP
2.000% 8/15/31		1,084,000		860,636
4.150% 4/15/32		125,000		114,034
5.500% 8/15/33		221,000		217,873
LXP Industrial Trust
6.750% 11/15/28		230,000		238,526
Prologis Euro Finance LLC
4.250% 1/31/43 EUR (b)		710,000		744,704
Realty Income Corp.
5.125% 7/06/34 EUR (b)		685,000		790,388
VICI Properties LP
4.950% 2/15/30		135,000		130,240
5.125% 5/15/32		303,000		288,679
5.625% 5/15/52		73,000		65,726
VICI Properties LP/VICI Note Co., Inc.
3.875% 2/15/29 (a)		190,000		175,621
4.125% 8/15/30 (a)		50,000		45,473
4.500% 1/15/28 (a)		135,000		129,884
4.625% 6/15/25 (a)		40,000		39,477
5.750% 2/01/27 (a)		10,000		10,000
				14,261,625
Retail — 0.2%
Ferrellgas LP/Ferrellgas Finance Corp.
5.875% 4/01/29 (a)		455,000		418,622

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Michaels Cos., Inc.
5.250% 5/01/28 (a)	$	556,000	$	444,798
7.875% 5/01/29 (a)		339,000		217,533
				1,080,953
Savings & Loans — 0.1%
Nationwide Building Society 1 day USD SOFR + 1.290%
2.972% VRN 2/16/28 (a)		720,000		674,857
Software — 0.0%
Open Text Corp.
6.900% 12/01/27 (a)		125,000		129,732
Telecommunications — 0.4%
CommScope, Inc.
4.750% 9/01/29 (a)		350,000		242,309
Frontier Communications Holdings LLC
8.625% 3/15/31 (a)		505,000		520,214
Intelsat Jackson Holdings SA
6.500% 3/15/30 (a)		420,000		390,756
Sprint Spectrum Co. LLC/Sprint Spectrum Co. II LLC/Sprint Spectrum Co. III LLC
4.738% 9/20/29 (a)		149,062		148,129
5.152% 9/20/29 (a)		1,511,250		1,504,024
				2,805,432
Water — 0.1%
Thames Water Utilities Finance PLC
4.375% 1/18/31 EUR (a) (b)		405,000		372,629
TOTAL CORPORATE DEBT (Cost $133,908,774)				126,721,152
MUNICIPAL OBLIGATIONS — 0.6%
Florida — 0.0%
County of Miami-Dade, FL, Aviation Revenue, Revenue Bonds, Series B,
2.707% 10/01/33		375,000		307,186
New York — 0.6%
City of New York, NY, General Obligation, Series A,
3.000% 8/01/34		945,000		789,645
New York City Transitional Finance Authority, NY, Future Tax Secured Revenue
Revenue Bonds, Series A2, 4.600% 5/01/31		530,000		520,170
Revenue Bonds, Series F3, 5.130% 2/01/35		1,033,000		1,031,894
Revenue Bonds, Series F3, 5.150% 2/01/36		1,033,000		1,029,625
New York State Dormitory Authority, Revenue Bonds, Series F,
5.628% 3/15/39		860,000		871,810
				4,243,144
TOTAL MUNICIPAL OBLIGATIONS (Cost $4,855,489)				4,550,330
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 17.6%
Automobile Asset-Backed Securities — 0.3%
SBNA Auto Receivables Trust, Series 2024-A, Class A3
5.320% 12/15/28 (a)		2,000,000		1,994,860

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Commercial Mortgage-Backed Securities — 3.4%
Arbor Realty Commercial Real Estate Notes Ltd., Series 2021-FL3, Class A, 1 mo. USD Term SOFR + 1.184%
6.513% FRN 8/15/34 (a)	$	1,306,616	$	1,294,336
BAMLL Commercial Mortgage Securities Trust
Series 2019-BPR, Class AMP, 3.287% 11/05/32 (a)		1,920,000		1,830,766
Series 2018-PARK, Class A, 4.227% VRN 8/10/38 (a) (d)		1,280,000		1,183,733
BX Commercial Mortgage Trust
Series 2020-VIV4, Class A, 2.843% 3/09/44 (a)		2,870,000		2,486,848
Series 2024-KING, Class B, 1 mo. USD Term SOFR + 1.741% 7.070% FRN 5/15/34 (a)		1,199,000		1,185,543
BX Trust
Series 2019-OC11, Class A, 3.202% 12/09/41 (a)		420,000		373,578
Series 2019-OC11, Class B, 3.605% 12/09/41 (a)		1,110,000		987,695
Series 2019-OC11, Class E, 4.076% VRN 12/09/41 (a) (d)		700,000		592,561
Series 2022-VAMF, Class C, 1 mo. USD Term SOFR + 1.580% 6.909% FRN 1/15/39 (a)		1,057,000		1,036,519
Series 2022-PSB, Class D, 1 mo. USD Term SOFR + 4.693% 10.022% FRN 8/15/39 (a)		1,069,307		1,068,972
Century Plaza Towers
Series 2019-CPT, Class A, 2.865% 11/13/39 (a)		805,000		680,294
Series 2019-CPT, Class B, 3.097% VRN 11/13/39 (a) (d)		1,000,000		816,433
Citigroup Commercial Mortgage Trust, Series 2020-420K, Class D,
3.422% VRN 11/10/42 (a) (d)		700,000		581,807
CyrusOne Data Centers Issuer I LLC, Series 2024-1A, Class A2
4.760% 3/22/49 (a)		2,270,000		2,119,868
DC Office Trust, Series 2019-MTC, Class A
2.965% 9/15/45 (a)		860,000		721,195
GWT Trust, Series 2024-WLF2, Class B, 1 mo. USD Term SOFR + 2.141%
7.469% FRN 5/15/41 (a)		1,532,000		1,531,040
Hudson Yards Mortgage Trust
Series 2019-55HY, Class A, 3.041% VRN 12/10/41 (a) (d)		860,000		746,428
Series 2019-30HY, Class A, 3.228% 7/10/39 (a)		880,000		782,194
JP Morgan Chase Commercial Mortgage Securities Trust, Series 2019-OSB, Class A
3.397% 6/05/39 (a)		900,000		793,543
MKT Mortgage Trust, Series 2020-525M, Class A
2.694% 2/12/40 (a)		570,000		459,549
One Bryant Park Trust, Series 2019-OBP, Class A
2.516% 9/15/54 (a)		1,085,000		918,859
SFAVE Commercial Mortgage Securities Trust, Series 2015-5AVE, Class A2B,
4.144% VRN 1/05/43 (a) (d)		50,000		41,606
TTAN, Series 2021-MHC, Class E, 1 mo. USD Term SOFR + 2.514%
7.844% FRN 3/15/38 (a)		1,041,628		1,028,607
Vantage Data Centers Issuer LLC, Series 2020-1A, Class A2
1.645% 9/15/45 (a)		1,062,000		1,005,656
				24,267,630
Home Equity Asset-Backed Securities — 1.1%
Argent Securities, Inc. Asset-Backed Pass-Through Certificates, Series 2005-W2, Class M1, 1 mo. USD Term SOFR + 0.849%
6.195% FRN 10/25/35		1,053,313		1,020,117
Countrywide Asset-Backed Certificates Trust
Series 2007-7, Class 1A, 1 mo. USD Term SOFR + 0.314% 5.660% FRN 10/25/47		2,494,265		2,314,969

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2004-5, Class M1, 1 mo. USD Term SOFR + 0.969% 6.315% FRN 8/25/34	$	67,790	$	67,112
Morgan Stanley Capital I, Inc. Trust
Series 2006-HE1, Class A4, 1 mo. USD Term SOFR + 0.694% 6.040% FRN 1/25/36		1,575,461		1,468,313
Series 2006-NC2, Class A2D, 1 mo. USD Term SOFR + 0.694% 6.040% FRN 2/25/36		875,384		861,667
Option One Mortgage Loan Trust, Series 2006-3, Class 1A1, 1 mo. USD Term SOFR + 0.394%
5.740% FRN 2/25/37		3,327,899		2,021,223
				7,753,401
Other Asset-Backed Securities — 4.0%
AIMCO CLO 11 Ltd., Series 2020-11A, Class AR, 3 mo. USD Term SOFR + 1.392%
6.709% FRN 10/17/34 (a)		1,715,000		1,716,429
AMMC CLO 15 Ltd., Series 2014-15A, Class AR3, 3 mo. USD Term SOFR + 1.382%
6.710% FRN 1/15/32 (a)		1,686,373		1,689,060
AMMC CLO 30 Ltd., Series 2024-30A, Class A1, 3 mo. USD Term SOFR + 1.680%
6.971% FRN 1/15/37 (a)		2,400,000		2,421,084
Apidos CLO XXV Ltd., Series 2016-25A, Class A1R2, 3 mo. USD Term SOFR + 1.150%
6.475% FRN 10/20/31 (a)		2,155,126		2,155,555
Barings CLO Ltd., Series 2018-4A, Class A1R, 3 mo. USD Term SOFR + 1.150%
6.479% FRN 10/15/30 (a)		2,125,000		2,125,425
Clover CLO Ltd., Series 2019-2A, Class BR, 3 mo. USD Term SOFR + 1.862%
7.185% FRN 10/25/33 (a)		2,400,000		2,400,864
CRSO Trust
7.121% 7/10/40		2,780,000		2,810,892
Flatiron CLO 21 Ltd., Series 2021-1A, Class B, 3 mo. USD Term SOFR + 1.862%
7.188% FRN 7/19/34 (a)		2,400,000		2,402,973
OCP CLO Ltd., Series 2014-6A, Class A1R2, 3 mo. USD Term SOFR + 1.150%
6.467% FRN 10/17/30 (a)		2,100,000		2,100,416
Progress Residential Trust
Series 2021-SFR8, Class C, 1.931% 10/17/38 (a)		2,500,000		2,289,217
Series 2020-SFR3, Class F, 2.796% 10/17/27 (a)		860,000		822,334
Series 2021-SFR10, Class F, 4.608% 12/17/40 (a)		1,126,396		998,168
Rad CLO 4 Ltd., Series 2019-4A, Class AR, 3 mo. USD Term SOFR + 1.230%
6.558% FRN 4/25/32 (a)		2,000,000		2,002,400
Rockford Tower CLO Ltd., Series 2019-1A, Class AR, 3 mo. USD Term SOFR + 1.382%
6.706% FRN 4/20/34 (a)		2,435,000		2,436,256
				28,371,073
Student Loans Asset-Backed Securities — 0.7%
Nelnet Student Loan Trust, Series 2005-4, Class A4, 90 day USD SOFR Average + 0.442%
5.795% FRN 3/22/32		1,585,558		1,533,882

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
SLM Student Loan Trust, Series 2008-5, Class B, 90 day USD SOFR Average + 2.112%
7.460% FRN 7/25/73	$	3,735,000	$	3,741,229
				5,275,111
Whole Loan Collateral Collateralized Mortgage Obligations — 8.1%
Ajax Mortgage Loan Trust
Series 2019-F, 2.860% STEP 7/25/59 (a)		1,391,238		1,317,566
Series 2022-B, Class A1, 3.500% STEP 3/27/62 (a)		2,461,428		2,314,805
American Home Mortgage Investment Trust, Series 2006-1, Class 12A1, 1 mo. USD Term SOFR + 0.514%
5.860% FRN 3/25/46		1,281,324		1,129,674
Bear Stearns ALT-A Trust, Series 2005-4, Class 25A1,
5.364% VRN 5/25/35 (d)		590,618		553,969
BINOM Securitization Trust, Series 2022-RPL1, Class A1,
3.000% VRN 2/25/61 (a) (d)		2,320,683		2,098,262
CIM Trust
Series 2021-J3, Class A1, 2.500% VRN 6/25/51 (a) (d)		4,970,181		3,961,001
Series 2023-NR1, Class A1, 6.000% STEP 6/25/62 (a)		2,905,763		2,849,675
COLT Mortgage Loan Trust, Series 2023-1, Class A1,
6.048% STEP 4/25/68 (a)		2,355,549		2,353,225
Credit Suisse Mortgage Trust
Series 2021-NQM6, Class A1, 1.174% VRN 7/25/66 (a) (d)		2,652,903		2,188,806
Series 2018-RPL9, Class A, 3.850% VRN 9/25/57 (a) (d)		1,357,771		1,276,942
Deutsche Alt-A Securities, Inc. Mortgage Loan Trust, Series 2007-OA3, Class A2, 1 mo. USD Term SOFR + 0.364%
5.710% FRN 7/25/47		2,755,861		2,288,334
First Horizon Alternative Mortgage Securities Trust, Series 2005-AA9, Class 2A1,
6.032% VRN 11/25/35 (d)		1,014,891		852,095
HarborView Mortgage Loan Trust
Series 2007-6, Class 1A1A, 1 mo. USD Term SOFR + 0.314% 5.653% FRN 8/19/37		2,168,395		1,740,280
Series 2006-10, Class 1A1A, 1 mo. USD Term SOFR + 0.514% 5.835% FRN 11/19/36		2,454,607		1,872,427
Series 2007-3, Class 2A1A, 1 mo. USD Term SOFR + 0.514% 5.853% FRN 5/19/37		2,606,789		2,322,592
HomeBanc Mortgage Trust, Series 2005-5, Class A1, 1 mo. USD Term SOFR + 0.634%
5.980% FRN 1/25/36		1,350,528		1,297,828
JP Morgan Mortgage Trust
Series 2021-13, Class A3, 2.500% VRN 4/25/52 (a) (d)		3,490,911		2,782,093
Series 2005-A5, Class 1A2, 4.623% VRN 8/25/35 (d)		68,912		66,463
MASTR Adjustable Rate Mortgages Trust, Series 2004-3, Class 4A1,
4.579% VRN 4/25/34 (d)		439,038		390,976
OBX Trust, Series 2021-J3, Class A1,
2.500% VRN 10/25/51 (a) (d)		3,923,726		3,122,121
Onslow Bay Mortgage Loan Trust, Series 2021-NQM4, Class A1,
1.957% VRN 10/25/61 (a) (d)		3,495,488		2,906,511
Preston Ridge Partners Mortgage LLC
Series 2021-6, Class A1, 1.793% STEP 7/25/26 (a)		1,191,140		1,162,141
Series 2022-1, Class A1, 3.720% STEP 2/25/27 (a)		3,096,325		3,026,965
Series 2021-5, Class A1, 4.793% STEP 6/25/26 (a)		3,045,372		2,978,351
Series 2022-4, Class A1, 5.000% STEP 8/25/27 (a)		752,115		735,073
Residential Accredit Loans, Inc. Trust, Series 2006-QA7, Class 2A1, 1 mo. USD Term SOFR + 0.484%
5.830% FRN 8/25/36		457,063		388,144

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Residential Asset Securitization Trust, Series 2006-A14C, Class 1A1
6.250% 12/25/36	$	1,781,968	$	1,238,126
Structured Asset Mortgage Investments II Trust, Series 2006-AR1, Class 3A1, 1 mo. USD Term SOFR + 0.574%
5.920% FRN 2/25/36		1,278,221		1,048,539
VOLT CIII LLC, Series 2021-CF1, Class A1,
1.992% STEP 8/25/51 (a)		1,832,345		1,779,171
Washington Mutual Mortgage Pass-Through Certificates Trust
Series 2006-AR12, Class 1A4, 4.478% VRN 10/25/36 (d)		3,547,456		3,083,287
Series 2005-AR2, Class 2A1A, 1 mo. USD Term SOFR + 0.734% 6.080% FRN 1/25/45		392,918		380,568
Series 2005-7, Class 4CB, 7.000% 8/25/35		2,052,687		1,596,788
Wells Fargo Mortgage-Backed Securities Trust, Series 2007-AR3, Class A4,
6.331% VRN 4/25/37 (d)		614,819		547,140
				57,649,938
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $128,901,693)				125,312,013
SOVEREIGN DEBT OBLIGATIONS — 0.5%
Brazilian Government International Bond
6.125% 3/15/34		730,000		701,577
Colombia Government International Bond
3.125% 4/15/31		200,000		157,410
Costa Rica Government International Bond
6.550% 4/03/34 (a)		300,000		308,522
Dominican Republic International Bond
4.500% 1/30/30 (a)		440,000		399,309
Guatemala Government Bond
3.700% 10/07/33 (a)		300,000		244,645
Mexico Government International Bond
2.659% 5/24/31		413,000		338,851
4.750% 4/27/32		200,000		184,576
Oman Government International Bond
6.750% 10/28/27 (a)		200,000		206,264
Panama Government International Bond
3.160% 1/23/30		425,000		357,989
Paraguay Government International Bond
4.950% 4/28/31 (a)		200,000		190,812
Perusahaan Penerbit SBSN Indonesia III
2.800% 6/23/30 (a)		200,000		174,826
Republic of South Africa Government International Bond
5.875% 4/20/32		200,000		185,520
Romanian Government International Bond
3.000% 2/14/31 (a)		270,000		223,846
				3,674,147
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $3,977,475)				3,674,147
U.S. Government Agency Obligations and Instrumentalities (e) — 37.5%
Collateralized Mortgage Obligations — 0.5%
Federal Home Loan Mortgage Corp. Multifamily Structured Pass-Through Certificates Series K155, Class A3 3.750% 4/25/33		2,115,000		1,930,142
Federal National Mortgage Association REMICS

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2018-43, Class CT, 3.000% 6/25/48	$	485,670	$	421,082
Series 2018-54, Class KA, 3.500% 1/25/47		288,862		277,953
Series 2018-38, Class PA, 3.500% 6/25/47		513,601		484,818
Government National Mortgage Association REMICS
Series 2018-124, Class NW, 3.500% 9/20/48		442,932		394,929
Series 2019-15, Class GT, 3.500% 2/20/49		489,380		435,747
				3,944,671
Pass-Through Securities — 36.6%
Federal Home Loan Mortgage Corp.
Pool #SD8193 2.000% 2/01/52		3,853,148		3,018,337
Pool #SD8199 2.000% 3/01/52		9,257,225		7,251,583
Pool #QE0312 2.000% 4/01/52		1,841,924		1,442,858
Pool #SD8204 2.000% 4/01/52		2,232,436		1,748,763
Pool #RA4179 2.500% 12/01/50		2,019,023		1,650,955
Pool #SD8147 2.500% 5/01/51		3,035,573		2,497,366
Pool #SD8189 2.500% 1/01/52		2,155,932		1,765,938
Pool #SD8194 2.500% 2/01/52		3,550,132		2,905,717
Pool #SD8200 2.500% 3/01/52		2,123,834		1,738,318
Pool #SD8212 2.500% 5/01/52		3,723,964		3,046,831
Pool #G08710 3.000% 6/01/46		50,309		44,108
Pool #G08715 3.000% 8/01/46		1,078,165		943,928
Pool #G08721 3.000% 9/01/46		145,006		126,952
Pool #G08726 3.000% 10/01/46		1,948,811		1,706,174
Pool #G08732 3.000% 11/01/46		1,383,501		1,211,248
Pool #G08741 3.000% 1/01/47		939,660		820,318
Pool #SD8213 3.000% 5/01/52 (f)		1,316,499		1,121,408
Pool #SD3016 3.000% 6/01/52		2,022,123		1,730,681
Pool #G60038 3.500% 1/01/44		474,625		436,788
Pool #G07848 3.500% 4/01/44		3,629,007		3,337,081
Pool #G07924 3.500% 1/01/45		996,765		907,008
Pool #G60138 3.500% 8/01/45		2,084,830		1,894,571
Pool #G08711 3.500% 6/01/46		820,535		742,801
Pool #G08716 3.500% 8/01/46		1,184,766		1,070,675
Pool #G08792 3.500% 12/01/47		1,003,009		903,287
Pool #G67707 3.500% 1/01/48		1,362,692		1,235,353
Pool #G67711 4.000% 3/01/48		372,946		349,280
Pool #G67713 4.000% 6/01/48		976,650		912,844
Pool #G67714 4.000% 7/01/48		1,340,962		1,255,450
Pool #G67717 4.000% 11/01/48		1,191,229		1,115,266
Pool #SD5202 4.000% 10/01/52 (f)		3,717,735		3,401,462
Pool #G08843 4.500% 10/01/48		437,780		418,734
Pool #G08826 5.000% 6/01/48		145,357		143,319
Pool #G08844 5.000% 10/01/48		50,534		49,746
Federal National Mortgage Association
Pool #MA4093 2.000% 8/01/40		742,332		623,025
Pool #MA4176 2.000% 11/01/40		1,959,704		1,644,741
Pool #MA4333 2.000% 5/01/41		605,947		506,855
Pool #MA4158 2.000% 10/01/50		2,707,043		2,134,924
Pool #BT9728 2.000% 10/01/51		4,726,868		3,705,713
Pool #BQ6913 2.000% 12/01/51		4,019,925		3,151,493
Pool #CB2767 2.000% 1/01/52		3,889,253		3,063,635
Pool #CB2766 2.000% 2/01/52		2,620,173		2,068,870
Pool #FS1598 2.000% 4/01/52		3,911,863		3,064,331
Pool #MA4577 2.000% 4/01/52		7,776,027		6,091,297
Pool #BL6060 2.455% 4/01/40		1,265,000		897,892
Pool #FS6925 2.500% 12/01/51		2,439,232		1,994,561
Pool #MA4548 2.500% 2/01/52		3,572,159		2,923,746

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #MA4563 2.500% 3/01/52	$	8,479,705	$	6,940,480
Pool #MA1607 3.000% 10/01/33		1,450,973		1,349,765
Pool #BN7755 3.000% 9/01/49		1,540,441		1,338,640
Pool #BO2259 3.000% 10/01/49		2,719,327		2,359,692
Pool #MA3811 3.000% 10/01/49		434,245		371,930
Pool #MA4579 3.000% 4/01/52		3,558,719		3,034,691
Pool #BV8526 3.000% 5/01/52		4,118,844		3,508,476
Pool #AB4262 3.500% 1/01/32		932,432		891,936
Pool #MA1148 3.500% 8/01/42		2,006,714		1,843,333
Pool #CA0996 3.500% 1/01/48		70,798		63,918
Pool #MA3276 3.500% 2/01/48		155,393		139,709
Pool #MA3305 3.500% 3/01/48		526,052		472,957
Pool #MA3332 3.500% 4/01/48		20,962		18,846
Pool #CA3633 3.500% 6/01/49		596,177		537,308
Pool #MA2995 4.000% 5/01/47		425,653		396,126
Pool #AS9830 4.000% 6/01/47		246,293		228,977
Pool #MA3027 4.000% 6/01/47		400,106		371,976
Pool #AS9972 4.000% 7/01/47		223,713		207,985
Pool #CB4121 4.000% 7/01/52 (f)		4,383,822		4,010,884
Pool #CB4818 4.000% 10/01/52		1,933,890		1,769,976
Pool #AL9106 4.500% 2/01/46		195,067		188,224
Pool #CA1710 4.500% 5/01/48		776,483		742,204
Pool #CA1711 4.500% 5/01/48		13,702		13,097
Pool #CA2208 4.500% 8/01/48		542,932		518,794
Pool #BW9897 4.500% 10/01/52		1,970,798		1,859,497
Pool #FS4233 4.500% 12/01/52		1,468,628		1,385,894
Pool #MA4840 4.500% 12/01/52		6,077,927		5,735,530
Pool #MA4917 4.500% 2/01/53		4,802,761		4,530,325
Pool #FS4701 4.500% 4/01/53		2,078,344		1,959,800
Pool #CB6854 4.500% 8/01/53		2,523,621		2,380,271
Pool #BY0545 5.000% 5/01/53		1,537,773		1,486,865
Pool #FS7252 5.000% 11/01/53 (f)		3,379,491		3,266,450
Government National Mortgage Association II
Pool #MA4126 3.000% 12/20/46		1,249,183		1,101,983
Pool #MA4836 3.000% 11/20/47		880,536		775,951
Pool #MA6209 3.000% 10/20/49		381,877		325,779
Pool #MA4127 3.500% 12/20/46		847,788		770,872
Pool #MA4382 3.500% 4/20/47		144,007		130,852
Pool #MA4719 3.500% 9/20/47		1,259,128		1,142,532
Pool #MA4837 3.500% 11/20/47		172,016		156,034
Pool #MA4962 3.500% 1/20/48		429,102		389,232
Pool #MA5019 3.500% 2/20/48		589,243		534,495
Pool #MA4838 4.000% 11/20/47		356,843		333,887
Pool #MA4901 4.000% 12/20/47		295,769		276,742
Pool #MA5078 4.000% 3/20/48		239,303		223,759
Pool #MA5466 4.000% 9/20/48		166,810		155,922
Pool #MA5528 4.000% 10/20/48		668,147		624,327
Pool #MA4264 4.500% 2/20/47		183,726		178,133
Pool #MA4512 4.500% 6/20/47		1,116,095		1,080,728
Pool #MA8347 4.500% 10/20/52		4,449,667		4,233,575
Pool #MA3666 5.000% 5/20/46		25,034		25,029
Pool #MA3806 5.000% 7/20/46		161,708		161,637
Pool #MA4072 5.000% 11/20/46		32,841		32,811
Pool #MA4454 5.000% 5/20/47		588,494		587,330
Government National Mortgage Association II, TBA
2.500% 7/20/54 (f)		11,675,000		9,818,551
4.500% 7/20/54 (f)		7,275,000		6,915,403
5.000% 7/20/54 (f)		10,000,000		9,736,427

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
5.500% 7/20/54 (f)	$	5,125,000	$	5,084,768
Uniform Mortgage-Backed Security, TBA
2.000% 7/01/54 (f)		9,400,000		7,351,828
2.500% 7/01/54 (f)		3,200,000		2,613,500
3.000% 7/01/54 (f)		8,600,000		7,318,067
3.500% 7/01/54 (f)		10,975,000		9,713,727
4.000% 7/01/54 (f)		19,425,000		17,770,841
4.500% 7/01/54 (f)		14,050,000		13,243,769
5.000% 7/01/54 (f)		9,550,000		9,229,550
5.500% 7/01/54 (f)		10,750,000		10,602,607
				261,381,435
Whole Loans — 0.4%
Federal National Mortgage Association Connecticut Avenue Securities, Series 2022-R03, Class 1M2, 30 day USD SOFR Average + 3.500%
8.835% FRN 3/25/42 (a)		2,400,000		2,521,146
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $279,506,309)				267,847,252
U.S. TREASURY OBLIGATIONS — 27.4%
U.S. Treasury Bonds & Notes — 27.4%
U.S. Treasury Bonds
4.500% 2/15/44		7,425,000		7,315,945
4.625% 5/15/44 (c)		41,685,000		41,600,159
4.625% 5/15/54		31,289,000		31,719,521
U.S. Treasury Notes
4.250% 6/30/29 (f)		45,435,000		45,236,490
4.375% 5/15/34		46,222,000		46,236,458
4.500% 5/31/29 (c)		14,405,000		14,500,743
4.625% 6/30/26		6,115,000		6,103,265
4.625% 6/15/27		2,825,000		2,832,851
				195,545,432
TOTAL U.S. TREASURY OBLIGATIONS (Cost $195,254,335)				195,545,432
TOTAL BONDS & NOTES (Cost $755,652,624)				732,816,511
	Number of Shares
EQUITIES — 0.1%
COMMON STOCK — 0.1%
Communication Services — 0.1%
Intelsat SA (g)		16,791		617,069
TOTAL COMMON STOCK (Cost $1,575,355)				617,069
TOTAL EQUITIES (Cost $1,575,355)				617,069
TOTAL LONG-TERM INVESTMENTS (Cost $757,227,979)				733,433,580

MassMutual Total Return Bond Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
SHORT-TERM INVESTMENTS — 26.3%
Investment of Cash Collateral from Securities Loaned — 6.1%
State Street Navigator Securities Lending Government Money Market Portfolio (h)		43,381,450	$	43,381,450
	Principal Amount
Repurchase Agreement — 20.2%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/28/24, 1.600%, due 7/01/24 (i)	$	144,112,363		144,112,363
TOTAL SHORT-TERM INVESTMENTS (Cost $187,493,813)				187,493,813
TOTAL INVESTMENTS — 129.0% (Cost $944,721,792) (j)				920,927,393
Other Assets/(Liabilities) — (29.0)%				(207,063,879)
NET ASSETS — 100.0%			$	713,863,514

Abbreviation Legend

CLO Collateralized Loan Obligation

CMT Constant Maturity Treasury Index

FRN Floating Rate Note

LIBOR London InterBank Offered Rate

PIK Payment in kind

REMICS Real Estate Mortgage Investment Conduits

SOFR Secured Overnight Financing Rate

STEP Step Coupon 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 June 30, 2024, the aggregate market value of these securities amounted to $139,221,717 or 19.50% of net assets.

(b) The principal amount of the security is in foreign currency. The market value is in U.S. dollars.

(c) Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2024, was $57,052,046 or 7.99% of net assets. The Fund received $14,873,163 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).

(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 June 30, 2024.

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

(g) Non-income producing security.

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

(i) Maturity value of $144,131,578. Collateralized by U.S. Government Agency obligations with a rate of 5.385%, maturity date of 4/30/26, and an aggregate market value, including accrued interest, of $146,994,733.

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

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
Bank of America N.A.	7/12/24	USD	231,761	EUR	214,000	$	2,472
Bank of New York	7/12/24	GBP	213,000	USD	265,350		3,919
Bank of New York	7/12/24	USD	362,676	EUR	336,000		2,670
Citibank N.A.	7/01/24	USD	417,686	EUR	390,135		(129)
Citibank N.A.	7/12/24	USD	950,327	GBP	748,000		4,724
Citibank N.A.	7/12/24	USD	11,526,832	EUR	10,560,000		212,354
Citibank N.A.	7/12/24	EUR	490,000	USD	526,187		(1,178)
Goldman Sachs International	7/12/24	EUR	388,000	USD	422,756		(7,035)
						$	217,797

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/Net Unrealized Appreciation (Depreciation)
Long
U.S. Treasury Note 2 Year	9/30/24		946	$	192,786,930	$	404,008
U.S. Treasury Note 5 Year	9/30/24		848		90,022,860		355,390
						$	759,398
Short
Euro-BOBL	9/06/24		31	$	(3,827,915)	$	(37,831)
Euro-Bund	9/06/24		34		(4,738,851)		(53,738)
Euro-Buxl 30 Year Bond	9/06/24		9		(1,228,187)		(27,138)
U.S. Treasury Note 10 Year	9/19/24		67		(7,333,333)		(35,620)
U.S. Treasury Ultra 10 Year	9/19/24		18		(2,021,028)		(22,535)
UK Long Gilt	9/26/24		4		(489,808)		(3,545)
						$	(180,407)

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)

Fixed 3.520%

Annually

12-Month USD SOFR

Annually

12/20/53

USD

4,836,000

$

202,006

$

—

$

202,006

Currency Legend

EUR Euro

GBP British Pound

USD U.S. Dollar

MassMutual Strategic Bond Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 98.8%
BANK LOANS — 1.5%
Auto Parts & Equipment — 0.0%
Clarios Global LP, 2024 Term Loan B, 1 mo. USD Term SOFR + 3.000%
8.344% VRN 5/06/30	$	69,825	$	69,912
Beverages — 0.1%
Triton Water Holdings, Inc., Term Loan, 3 mo. USD Term SOFR + 3.250%
8.595% VRN 3/31/28		239,572		239,572
Building Materials — 0.1%
Emrld Borrower LP, Term Loan B, 1 mo. USD Term SOFR + 2.500%
7.844% VRN 5/31/30		99,674		99,570
Quikrete Holdings, Inc., 2024 Term Loan B1, 1 mo. USD Term SOFR + 2.250%
7.594% VRN 3/19/29		137,891		137,891
				237,461
Commercial Services — 0.1%
APi Group DE, Inc., 2024 Term Loan B, 1 mo. USD Term SOFR + 2.000%
7.344% VRN 1/03/29		89,014		88,910
GTCR W Merger Sub LLC, USD Term Loan B, 3 mo. USD Term SOFR + 3.000%
8.335% VRN 1/31/31		380,000		379,947
				468,857
Computers — 0.0%
Peraton Corp., Term Loan B, 1 mo. USD Term SOFR + 3.750%
9.194% VRN 2/01/28		158,672		158,605
Diversified Financial Services — 0.1%
Avolon TLB Borrower 1 (US) LLC, 2023 Term Loan B6, 1 mo. USD Term SOFR + 2.000%
7.339% VRN 6/22/28		37,080		37,115
Castlelake Aviation Ltd., Term Loan B, 3 mo. USD Term SOFR + 2.500%
7.839% VRN 10/22/26		113,896		113,996
Citadel Securities LP, 2024 Term Loan B, 1 mo. USD Term SOFR + 2.250%
7.594% VRN 7/29/30		20,003		20,054
Deerfield Dakota Holding LLC, 2020 USD Term Loan B, 3 mo. USD Term SOFR + 3.750%
9.085% VRN 4/09/27		224,691		224,410
Focus Financial Partners LLC, 2024 Term Loan B7, 1 mo. USD Term SOFR + 2.750%
8.094% VRN 6/30/28		118,204		118,011
				513,586

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Electronics — 0.0%
II-VI, Inc., 2024 Term Loan B, 1 mo. USD Term SOFR + 2.500%
7.844% VRN 7/02/29	$	136,259	$	136,157
Entertainment — 0.3%
Caesars Entertainment, Inc.
Term Loan B, 3 mo. USD Term SOFR + 2.750%
8.097% VRN 2/06/30		17,318		17,302
2024 Term Loan B1, 3 mo. USD Term SOFR + 2.750%
8.097% VRN 2/06/31		290,000		289,727
Flutter Financing BV, Term Loan B, 3 mo. USD Term SOFR + 2.250%
7.585% VRN 11/25/30		278,600		278,427
Light and Wonder International, Inc., 2024 Term Loan, 1 mo. USD Term SOFR + 2.750%
8.070% VRN 4/14/29		235,809		235,642
PCI Gaming Authority, Term Loan, 1 mo. USD Term SOFR + 2.500%
7.845% VRN 5/29/26		244,417		243,806
				1,064,904
Health Care - Products — 0.1%
Sotera Health Holdings LLC, 2024 Term Loan B, 1 mo. USD Term SOFR + 3.250%
8.594% VRN 5/30/31		200,000		199,334
Health Care - Services — 0.1%
Phoenix Guarantor, Inc., 2024 Term Loan, 1 mo. USD Term SOFR + 3.250%
8.594% VRN 2/21/31		543,005		541,311
Insurance — 0.1%
Acrisure LLC, 2021 First Lien Term Loan B, 1 mo. USD LIBOR + 4.250%
9.708% VRN 2/15/27		88,864		88,809
AmWINS Group, Inc., 2021 Term Loan B, 1 mo. USD Term SOFR + 2.250%
7.708% VRN 2/19/28		281,564		281,192
				370,001
Leisure Time — 0.0%
Alterra Mountain Co., 2024 Term Loan B4, 1 mo. USD Term SOFR + 3.250%
8.594% VRN 8/17/28		163,676		163,949
Lodging — 0.0%
Four Seasons Hotels Ltd., 2024 Term Loan B, 1 mo. USD Term SOFR + 2.000%
7.344% VRN 11/30/29		109,444		109,794
Machinery - Diversified — 0.0%
Ali Group North America Corp., 2021 Term Loan B, 1 mo. USD Term SOFR + 2.000%
7.458% VRN 7/30/29		116,161		116,554
Media — 0.1%
Nexstar Broadcasting, Inc., 2019 Term Loan B4, 1 mo. USD Term SOFR + 2.500%
7.958% VRN 9/18/26		160,766		161,078
Virgin Media Bristol LLC, USD Term Loan N, 1 mo. USD Term SOFR + 2.500%
7.943% VRN 1/31/28		203,954		194,729
				355,807

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Retail — 0.1%
Harbor Freight Tools USA, Inc., 2024 Term Loan B,
0.000% 6/05/31 (a)	$	200,000	$	199,296
Software — 0.2%
Athenahealth Group, Inc., 2022 Term Loan B, 1 mo. USD Term SOFR + 3.250%
8.594% VRN 2/15/29		223,003		222,028
Cloudera, Inc., 2021 Term Loan, 1 mo. USD Term SOFR + 3.750%
9.194% VRN 10/08/28		90,838		90,838
Cotiviti Corp., 2024 Term Loan, 1 mo. USD Term SOFR + 3.250%
8.579% VRN 5/01/31		408,975		406,419
DCert Buyer, Inc., 2019 Term Loan B, 1 mo. USD Term SOFR + 4.000%
9.344% VRN 10/16/26		31,211		30,386
				749,671
Transportation — 0.1%
Genesee & Wyoming Inc., 2024 Term Loan B, 3 mo. USD Term SOFR + 2.000%
7.335% VRN 4/10/31		170,000		169,765
TOTAL BANK LOANS (Cost $5,857,955)				5,864,536
CORPORATE DEBT — 23.9%
Aerospace & Defense — 0.6%
Boeing Co.
2.196% 2/04/26		180,000		169,177
2.700% 2/01/27		90,000		82,971
2.800% 3/01/27		150,000		138,128
3.100% 5/01/26		80,000		75,907
3.550% 3/01/38		80,000		57,895
3.750% 2/01/50		40,000		26,174
General Dynamics Corp.
4.250% 4/01/40		20,000		17,558
4.250% 4/01/50		50,000		42,114
L3Harris Technologies, Inc.
5.054% 4/27/45		50,000		46,144
Lockheed Martin Corp.
3.900% 6/15/32		50,000		46,635
4.150% 6/15/53		260,000		209,762
4.500% 5/15/36		60,000		56,324
5.200% 2/15/64		40,000		37,818
Northrop Grumman Corp.
2.930% 1/15/25		160,000		157,720
3.250% 1/15/28		290,000		273,116
5.250% 5/01/50		160,000		151,795
RTX Corp.
2.250% 7/01/30		110,000		93,946
3.030% 3/15/52		120,000		76,509
4.125% 11/16/28		160,000		154,016
4.500% 6/01/42		130,000		112,594
6.000% 3/15/31		120,000		124,998
TransDigm, Inc.
6.375% 3/01/29 (b)		40,000		40,202
6.625% 3/01/32 (b)		60,000		60,604

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
7.125% 12/01/31 (b)	$	90,000	$	92,734
				2,344,841
Agriculture — 0.4%
Altria Group, Inc.
2.450% 2/04/32		140,000		113,201
5.800% 2/14/39		160,000		160,089
5.950% 2/14/49		260,000		254,927
6.200% 2/14/59		56,000		55,544
6.875% 11/01/33		270,000		291,757
BAT Capital Corp.
3.557% 8/15/27		45,000		42,744
4.540% 8/15/47		360,000		277,194
Philip Morris International, Inc.
2.100% 5/01/30		40,000		33,874
4.500% 3/20/42		80,000		68,361
4.875% 2/13/29		70,000		69,220
5.125% 2/13/31		20,000		19,788
5.250% 2/13/34		50,000		49,053
Reynolds American, Inc.
5.850% 8/15/45		110,000		101,457
				1,537,209
Airlines — 0.4%
American Airlines, Inc.
8.500% 5/15/29 (b)		100,000		103,897
Delta Air Lines, Inc.
2.900% 10/28/24		180,000		178,050
Delta Air Lines, Inc./SkyMiles IP Ltd.
4.500% 10/20/25 (b)		160,000		158,062
4.750% 10/20/28 (b)		300,000		292,172
Mileage Plus Holdings LLC/Mileage Plus Intellectual Property Assets Ltd.
6.500% 6/20/27 (b)		198,000		198,395
Spirit Loyalty Cayman Ltd./Spirit IP Cayman Ltd.
8.000% 9/20/25 (b) (c)		250,000		182,495
8.000% 9/20/25 (b)		240,000		175,195
United Airlines, Inc.
4.375% 4/15/26 (b)		80,000		77,280
4.625% 4/15/29 (b)		290,000		270,080
				1,635,626
Apparel — 0.1%
NIKE, Inc.
2.850% 3/27/30		170,000		153,060
3.250% 3/27/40		130,000		101,134
3.375% 3/27/50		20,000		14,411
				268,605
Auto Manufacturers — 1.4%
Ford Motor Co.
4.750% 1/15/43		90,000		72,779
6.100% 8/19/32 (c)		90,000		89,871
Ford Motor Credit Co. LLC
2.900% 2/16/28		390,000		352,768
3.625% 6/17/31		220,000		189,627
4.000% 11/13/30		200,000		178,543

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
4.125% 8/17/27	$	200,000	$	190,039
4.950% 5/28/27		250,000		244,028
5.125% 6/16/25		200,000		198,488
General Motors Co.
5.150% 4/01/38		40,000		36,796
5.600% 10/15/32		40,000		40,009
5.950% 4/01/49 (c)		110,000		106,760
6.125% 10/01/25		20,000		20,104
6.600% 4/01/36		10,000		10,464
Nissan Motor Co. Ltd.
3.522% 9/17/25 (b)		410,000		397,822
4.345% 9/17/27 (b)		300,000		286,437
Toyota Motor Credit Corp.
4.450% 5/18/26		3,070,000		3,030,709
				5,445,244
Auto Parts & Equipment — 0.0%
ZF North America Capital, Inc.
6.875% 4/23/32 (b)		170,000		175,755
Banks — 6.7%
ABN AMRO Bank NV
4.750% 7/28/25 (b)		260,000		256,378
Banco Santander SA
2.746% 5/28/25		400,000		389,613
Bank of America Corp.
1 day USD SOFR + 1.210% 2.572% VRN 10/20/32		60,000		49,731
1 day USD SOFR + 2.150% 2.592% VRN 4/29/31		360,000		311,262
1 day USD SOFR + 1.330% 2.972% VRN 2/04/33		550,000		465,451
3 mo. USD Term SOFR + 1.302% 3.419% VRN 12/20/28		570,000		535,984
3 mo. USD Term SOFR + 1.632% 3.593% VRN 7/21/28		270,000		256,981
3 mo. USD Term SOFR + 1.332% 3.970% VRN 3/05/29		760,000		726,669
3 mo. USD Term SOFR + 1.472% 3.974% VRN 2/07/30		270,000		255,696
4.000% 1/22/25		140,000		138,668
3 mo. USD Term SOFR + 3.412% 4.083% VRN 3/20/51		420,000		335,431
4.200% 8/26/24		380,000		379,041
4.250% 10/22/26		50,000		48,759
3 mo. USD Term SOFR + 1.782% 4.330% VRN 3/15/50		90,000		75,131
1 day USD SOFR + 1.580% 4.376% VRN 4/27/28		300,000		292,812
4.450% 3/03/26		50,000		49,169
5.000% 1/21/44		130,000		122,298
3 mo. USD Term SOFR + 3.967% 6.250% VRN (d)		170,000		169,295
Bank of Montreal
1.850% 5/01/25		70,000		67,900
5 yr. USD Swap + 1.432% 3.803% VRN 12/15/32		90,000		84,561
Bank of New York Mellon Corp.
1.600% 4/24/25		170,000		164,785
Bank of Nova Scotia
1.300% 6/11/25		120,000		115,306
5 yr. CMT + 2.050% 4.588% VRN 5/04/37		100,000		90,064
Barclays PLC 3 mo. USD LIBOR + 3.054%
5.088% VRN 6/20/30		510,000		487,585
BNP Paribas SA
1 day USD SOFR + 2.074% 2.219% VRN 6/09/26 (b)		200,000		193,335
5 yr. USD Swap + 1.483% 4.375% VRN 3/01/33 (b)		220,000		207,638
4.400% 8/14/28 (b)		400,000		384,100
4.625% 3/13/27 (b)		260,000		253,090
1 yr. CMT + 1.450% 5.125% VRN 1/13/29 (b)		400,000		396,543

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
1 day USD SOFR + 1.866% 5.894% VRN 12/05/34 (b)	$	200,000	$	204,856
5 yr. CMT + 4.354% 8.500% VRN (b) (c) (d)		200,000		204,843
Citigroup, Inc.
1 day USD SOFR + 2.107% 2.572% VRN 6/03/31		140,000		120,165
1 day USD SOFR + 1.939% 3.785% VRN 3/17/33		370,000		329,681
3 mo. USD Term SOFR + 1.600% 3.980% VRN 3/20/30		180,000		169,922
4.125% 7/25/28		150,000		143,988
4.300% 11/20/26		510,000		497,478
1 day USD SOFR + 3.914% 4.412% VRN 3/31/31		410,000		390,759
4.450% 9/29/27		370,000		360,652
4.650% 7/30/45		181,000		158,028
4.650% 7/23/48		70,000		61,066
1 day USD SOFR + 1.887% 4.658% VRN 5/24/28		50,000		49,204
4.750% 5/18/46		40,000		34,314
1 day USD SOFR + 2.086% 4.910% VRN 5/24/33		130,000		124,834
5.300% 5/06/44		16,000		14,904
3 mo. USD Term SOFR + 4.167% 5.950% VRN (d)		150,000		149,020
6.625% 6/15/32		20,000		21,347
8.125% 7/15/39		50,000		62,506
3 mo. USD Term SOFR + 3.685% 9.007% VRN (d)		50,000		49,874
Cooperatieve Rabobank UA 1 yr. CMT + 1.220%
3.649% VRN 4/06/28 (b)		300,000		286,343
Credit Agricole SA 1 day USD SOFR + 1.676%
1.907% VRN 6/16/26 (b)		270,000		259,912
Goldman Sachs Capital II 3 mo. USD Term SOFR + 1.029%
6.375% VRN (d)		8,000		6,866
Goldman Sachs Group, Inc.
1 day USD SOFR + 1.472% 2.908% VRN 7/21/42		80,000		56,178
1 day USD SOFR + 1.513% 3.210% VRN 4/22/42		40,000		29,573
3.500% 4/01/25		370,000		364,341
3.500% 11/16/26		200,000		191,957
1 day USD SOFR + 1.846% 3.615% VRN 3/15/28		50,000		47,809
3 mo. USD Term SOFR + 1.772% 3.691% VRN 6/05/28		350,000		334,818
3.850% 7/08/24		90,000		89,966
3 mo. USD Term SOFR + 1.563% 4.223% VRN 5/01/29		490,000		471,686
4.250% 10/21/25		160,000		157,196
4.750% 10/21/45		80,000		71,819
5.150% 5/22/45		290,000		271,274
6.250% 2/01/41		130,000		138,039
6.750% 10/01/37		80,000		86,306
HSBC Holdings PLC
1 day USD SOFR + 1.929% 2.099% VRN 6/04/26		510,000		493,068
1 day USD SOFR + 2.530% 4.762% VRN 3/29/33		200,000		185,533
Intesa Sanpaolo SpA
5.710% 1/15/26 (b)		200,000		198,099
JP Morgan Chase & Co.
1 day USD SOFR + 1.850% 2.083% VRN 4/22/26		340,000		330,161
1 day USD SOFR + 2.040% 2.522% VRN 4/22/31		300,000		259,298
1 day USD SOFR + 1.180% 2.545% VRN 11/08/32		100,000		83,268
1 day USD SOFR + 2.440% 3.109% VRN 4/22/51		80,000		54,469
3 mo. USD Term SOFR + 1.207% 3.509% VRN 1/23/29		70,000		66,196
3.875% 9/10/24		300,000		298,828
3 mo. USD Term SOFR + 1.522% 4.203% VRN 7/23/29		310,000		298,332
4.250% 10/01/27		70,000		68,226
3 mo. USD Term SOFR + 1.592% 4.452% VRN 12/05/29		700,000		679,572
4.950% 6/01/45		10,000		9,360
Lloyds Banking Group PLC
4.550% 8/16/28		370,000		359,356

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Mitsubishi UFJ Financial Group, Inc. 1 yr. CMT + 1.125%
3.837% VRN 4/17/26	$	200,000	$	196,988
Morgan Stanley
1 day USD SOFR + 1.990% 2.188% VRN 4/28/26		260,000		252,497
1 day USD SOFR + 1.143% 2.699% VRN 1/22/31		10,000		8,766
1 day USD SOFR + 3.120% 3.622% VRN 4/01/31		640,000		587,273
3 mo. USD Term SOFR + 1.402% 3.772% VRN 1/24/29		350,000		333,168
3 mo. USD Term SOFR + 1.890% 4.431% VRN 1/23/30		10,000		9,674
National Securities Clearing Corp.
1.500% 4/23/25 (b)		250,000		242,360
PNC Financial Services Group, Inc.
1 day USD SOFR + 1.841% 5.582% VRN 6/12/29		200,000		202,188
1 day USD SOFR + 1.322% 5.812% VRN 6/12/26		70,000		70,069
Royal Bank of Canada
1.150% 6/10/25		250,000		240,061
3.875% 5/04/32		40,000		36,639
5.150% 2/01/34		110,000		109,154
Santander Holdings USA, Inc.
4.500% 7/17/25		50,000		49,277
Toronto-Dominion Bank
1.150% 6/12/25		280,000		268,945
Truist Financial Corp. 1 day USD SOFR + 2.050%
6.047% VRN 6/08/27		130,000		130,910
UBS AG
5.000% 7/09/27		250,000		247,942
7.950% 1/09/25		710,000		717,457
UBS Group AG
1 day USD SOFR + 2.044% 2.193% VRN 6/05/26 (b)		480,000		463,862
1 day USD SOFR + 1.730% 3.091% VRN 5/14/32 (b)		350,000		298,552
1 day USD SOFR + 3.730% 4.194% VRN 4/01/31 (b)		250,000		233,381
4.253% 3/23/28 (b)		340,000		325,369
5 yr. CMT + 4.745% 9.250% VRN (b) (d)		200,000		215,181
US Bancorp
1.450% 5/12/25 (c)		200,000		193,159
1 day USD SOFR + 0.730% 2.215% VRN 1/27/28		30,000		27,737
1 day USD SOFR + 2.020% 5.775% VRN 6/12/29		140,000		142,120
1 day USD SOFR + 2.260% 5.836% VRN 6/12/34		50,000		50,695
Wells Fargo & Co.
1 day USD SOFR + 2.000% 2.188% VRN 4/30/26		200,000		194,209
1 day USD SOFR + 2.100% 2.393% VRN 6/02/28		230,000		211,827
3 mo. USD Term SOFR + 1.432% 2.879% VRN 10/30/30		150,000		133,058
3.000% 10/23/26		350,000		332,477
1 day USD SOFR + 1.500% 3.350% VRN 3/02/33		300,000		260,162
4.300% 7/22/27		240,000		233,657
4.400% 6/14/46		160,000		129,050
3 mo. USD Term SOFR + 4.032% 4.478% VRN 4/04/31		210,000		201,053
4.650% 11/04/44		70,000		59,132
4.750% 12/07/46		10,000		8,468
4.900% 11/17/45		220,000		191,299
3 mo. USD Term SOFR + 4.502% 5.013% VRN 4/04/51		1,010,000		920,026
5.375% 11/02/43		100,000		93,765
1 day USD SOFR + 1.990% 5.557% VRN 7/25/34		160,000		159,882
1 day USD SOFR + 1.740% 5.574% VRN 7/25/29		120,000		121,089
5.875% VRN (d) (e)		50,000		49,772
				25,650,916

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Beverages — 0.2%
Anheuser-Busch Cos. LLC/Anheuser-Busch InBev Worldwide, Inc.
4.900% 2/01/46	$	50,000	$	46,098
Anheuser-Busch InBev Worldwide, Inc.
3.500% 6/01/30		130,000		120,772
4.350% 6/01/40		30,000		26,441
4.600% 4/15/48		3,000		2,653
4.750% 1/23/29		190,000		188,923
5.550% 1/23/49		110,000		110,822
Coca-Cola Co.
2.500% 6/01/40		10,000		7,020
Constellation Brands, Inc.
4.350% 5/09/27		80,000		78,022
PepsiCo, Inc.
1.625% 5/01/30		170,000		142,274
				723,025
Biotechnology — 0.0%
Amgen, Inc.
4.663% 6/15/51		24,000		20,505
Gilead Sciences, Inc.
4.500% 2/01/45		10,000		8,638
4.750% 3/01/46		40,000		35,651
				64,794
Building Materials — 0.0%
Builders FirstSource, Inc.
4.250% 2/01/32 (b)		20,000		17,679
Carrier Global Corp.
3.577% 4/05/50		20,000		14,547
				32,226
Chemicals — 0.3%
MEGlobal BV
4.250% 11/03/26 (b)		230,000		222,163
OCP SA
3.750% 6/23/31 (b)		260,000		223,794
5.125% 6/23/51 (b)		220,000		165,279
6.750% 5/02/34 (b)		200,000		205,220
Orbia Advance Corp. SAB de CV
2.875% 5/11/31 (b) (c)		490,000		405,399
				1,221,855
Coal — 0.0%
Teck Resources Ltd.
6.000% 8/15/40		20,000		19,659
Commercial Services — 0.2%
Cintas Corp. No. 2
3.700% 4/01/27		160,000		154,009
DP World Ltd.
5.625% 9/25/48 (b)		330,000		313,500
United Rentals North America, Inc.
3.750% 1/15/32		80,000		69,605
3.875% 11/15/27		60,000		56,647

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3.875% 2/15/31	$	20,000	$	17,843
6.125% 3/15/34 (b)		320,000		318,833
				930,437
Cosmetics & Personal Care — 0.1%
Haleon US Capital LLC
3.375% 3/24/29		260,000		241,410
Kenvue, Inc.
4.900% 3/22/33		160,000		158,239
Procter & Gamble Co.
3.000% 3/25/30		100,000		92,012
				491,661
Diversified Financial Services — 0.5%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust
2.450% 10/29/26		320,000		298,507
3.000% 10/29/28		160,000		145,403
3.300% 1/30/32		160,000		137,474
Air Lease Corp.
3.375% 7/01/25		80,000		78,172
5.300% 2/01/28		80,000		79,827
American Express Co.
4.050% 5/03/29		140,000		135,107
Charles Schwab Corp.
5.875% 8/24/26		280,000		283,218
1 day USD SOFR + 2.010% 6.136% VRN 8/24/34		50,000		52,067
ILFC E-Capital Trust II 3 mo. USD Term SOFR + 2.062%
7.409% VRN 12/21/65 (b)		10,000		8,286
Intercontinental Exchange, Inc.
4.600% 3/15/33		50,000		47,716
Jane Street Group/JSG Finance, Inc.
7.125% 4/30/31 (b)		80,000		82,038
KKR Group Finance Co. II LLC
5.500% 2/01/43 (b) (c)		20,000		19,041
Mastercard, Inc.
3.850% 3/26/50		50,000		39,437
Vanguard Group Inc.
3.050% 8/22/50		450,000		282,786
Visa, Inc.
4.300% 12/14/45		160,000		138,765
				1,827,844
Electric — 0.2%
American Transmission Systems, Inc.
2.650% 1/15/32 (b)		440,000		366,020
Consolidated Edison Co. of New York, Inc.
3.350% 4/01/30		70,000		64,266
3.950% 4/01/50		50,000		39,012
Duke Energy Ohio, Inc.
3.650% 2/01/29		210,000		198,199
Exelon Corp.
5.625% 6/15/35		40,000		39,915
Pacific Gas & Electric Co.
2.100% 8/01/27		140,000		126,319
2.500% 2/01/31		40,000		32,973
3.300% 8/01/40		50,000		35,607

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3.500% 8/01/50	$	80,000	$	52,208
				954,519
Electronics — 0.1%
Honeywell International, Inc.
5.000% 3/01/35		190,000		188,364
Entertainment — 0.1%
Caesars Entertainment, Inc.
7.000% 2/15/30 (b)		30,000		30,650
Warnermedia Holdings, Inc.
3.755% 3/15/27		60,000		56,965
4.054% 3/15/29 (c)		80,000		73,880
4.279% 3/15/32		200,000		174,566
5.050% 3/15/42		20,000		16,268
5.141% 3/15/52		10,000		7,786
6.412% 3/15/26		110,000		110,000
Wynn Resorts Finance LLC/Wynn Resorts Capital Corp.
7.125% 2/15/31 (b)		90,000		93,323
				563,438
Environmental Controls — 0.0%
Waste Connections, Inc.
5.000% 3/01/34		120,000		117,296
Food — 0.1%
Mars, Inc.
3.200% 4/01/30 (b)		80,000		73,150
Mondelez International, Inc.
1.500% 5/04/25		340,000		328,571
				401,721
Forest Products & Paper — 0.1%
Suzano Austria GmbH
3.125% 1/15/32		10,000		8,185
3.750% 1/15/31		290,000		252,672
				260,857
Health Care - Products — 0.2%
Abbott Laboratories
4.750% 11/30/36		80,000		77,665
Medline Borrower LP/Medline Co.-Issuer, Inc.
6.250% 4/01/29 (b)		100,000		101,132
Medtronic, Inc.
4.625% 3/15/45		18,000		16,257
Solventum Corp.
5.400% 3/01/29 (b)		160,000		159,512
5.450% 3/13/31 (b)		150,000		148,116
5.600% 3/23/34 (b)		220,000		216,078
5.900% 4/30/54 (b)		160,000		152,938
				871,698
Health Care - Services — 0.4%
Centene Corp.
2.625% 8/01/31		10,000		8,212

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3.000% 10/15/30	$	10,000	$	8,551
4.250% 12/15/27		70,000		66,835
4.625% 12/15/29		120,000		113,499
CommonSpirit Health
4.350% 11/01/42		20,000		16,903
Elevance Health, Inc.
3.350% 12/01/24		120,000		118,912
3.650% 12/01/27		90,000		86,026
4.100% 5/15/32		60,000		55,665
4.550% 5/15/52		10,000		8,381
Fresenius Medical Care US Finance II, Inc.
4.750% 10/15/24 (b)		70,000		69,608
HCA, Inc.
3.500% 9/01/30		70,000		63,143
4.500% 2/15/27		40,000		39,086
5.250% 6/15/26		60,000		59,732
5.500% 6/15/47		80,000		73,958
Humana, Inc.
2.150% 2/03/32		40,000		31,917
4.500% 4/01/25		50,000		49,636
4.625% 12/01/42		70,000		58,771
4.800% 3/15/47		10,000		8,454
UnitedHealth Group, Inc.
1.250% 1/15/26		50,000		47,111
2.300% 5/15/31		20,000		16,781
3.125% 5/15/60		30,000		18,913
3.875% 12/15/28		110,000		105,391
3.875% 8/15/59		90,000		66,597
4.000% 5/15/29		100,000		96,173
4.200% 5/15/32		70,000		65,877
4.250% 6/15/48		110,000		90,904
4.450% 12/15/48		50,000		42,868
5.800% 3/15/36		70,000		73,199
				1,561,103
Home Builders — 0.0%
Lennar Corp.
4.750% 11/29/27		40,000		39,442
MDC Holdings, Inc.
6.000% 1/15/43		20,000		21,035
				60,477
Insurance — 0.3%
Aon North America, Inc.
5.450% 3/01/34		280,000		278,770
Berkshire Hathaway Finance Corp.
4.250% 1/15/49		160,000		136,599
Brighthouse Financial, Inc.
4.700% 6/22/47		11,000		8,535
Chubb INA Holdings LLC
3.350% 5/03/26		120,000		116,117
Guardian Life Global Funding
1.100% 6/23/25 (b)		120,000		114,973
MetLife Capital Trust IV
7.875% 12/15/67 (b)		200,000		214,221
New York Life Global Funding
0.950% 6/24/25 (b)		100,000		95,716

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Principal Life Global Funding II
1.250% 6/23/25 (b)	$	110,000	$	105,574
Teachers Insurance & Annuity Association of America
4.900% 9/15/44 (b)		50,000		44,198
6.850% 12/16/39 (b)		22,000		24,541
				1,139,244
Internet — 0.5%
Alphabet, Inc.
1.900% 8/15/40		100,000		65,130
Amazon.com, Inc.
2.100% 5/12/31		80,000		67,398
2.500% 6/03/50		60,000		36,691
3.150% 8/22/27		470,000		446,282
3.450% 4/13/29		80,000		75,890
3.600% 4/13/32		320,000		293,887
4.250% 8/22/57		70,000		58,570
4.950% 12/05/44		180,000		174,013
Prosus NV
3.061% 7/13/31 (b)		370,000		306,314
3.832% 2/08/51 (b)		210,000		136,595
4.027% 8/03/50 (b)		310,000		209,229
				1,869,999
Investment Companies — 0.4%
Golub Capital BDC, Inc.
2.500% 8/24/26		1,570,000		1,444,159
Iron & Steel — 0.1%
ArcelorMittal SA
7.000% STEP 10/15/39		60,000		64,443
Vale Overseas Ltd.
6.875% 11/21/36		174,000		186,726
				251,169
Leisure Time — 0.1%
NCL Corp. Ltd.
8.125% 1/15/29 (b)		90,000		94,298
Royal Caribbean Cruises Ltd.
6.250% 3/15/32 (b)		70,000		70,588
VOC Escrow Ltd.
5.000% 2/15/28 (b)		210,000		203,571
				368,457
Lodging — 0.3%
Hilton Domestic Operating Co., Inc.
6.125% 4/01/32 (b)		70,000		70,340
Las Vegas Sands Corp.
2.900% 6/25/25		100,000		97,050
3.900% 8/08/29		40,000		36,588
6.000% 8/15/29		70,000		70,361
Sands China Ltd.
4.050% STEP 1/08/26		280,000		270,961
5.125% STEP 8/08/25		750,000		743,428
				1,288,728

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Machinery - Diversified — 0.1%
Deere & Co.
3.100% 4/15/30	$	60,000	$	54,567
3.750% 4/15/50		90,000		70,547
Otis Worldwide Corp.
2.056% 4/05/25		140,000		136,225
				261,339
Media — 1.3%
Altice Financing SA
5.750% 8/15/29 (b)		210,000		152,472
CCO Holdings LLC/CCO Holdings Capital Corp.
4.500% 8/15/30 (b)		30,000		25,397
4.500% 5/01/32		840,000		676,554
4.750% 2/01/32 (b)		70,000		57,328
Charter Communications Operating LLC/Charter Communications Operating Capital
3.500% 3/01/42		60,000		39,917
4.200% 3/15/28		140,000		132,305
4.400% 4/01/33 (c)		140,000		123,416
4.800% 3/01/50		30,000		22,008
4.908% 7/23/25		63,000		62,388
5.050% 3/30/29		360,000		346,209
5.125% 7/01/49		100,000		76,760
5.375% 4/01/38		100,000		87,072
5.375% 5/01/47		20,000		15,978
5.500% 4/01/63		80,000		61,992
6.484% 10/23/45		160,000		146,141
6.550% 6/01/34		60,000		60,020
6.834% 10/23/55		60,000		56,728
Comcast Corp.
2.800% 1/15/51		30,000		18,533
2.887% 11/01/51		260,000		162,212
3.150% 3/01/26		280,000		270,645
3.250% 11/01/39		30,000		23,087
3.300% 4/01/27		120,000		114,745
3.400% 4/01/30		180,000		165,473
3.400% 7/15/46		30,000		21,697
3.450% 2/01/50		40,000		28,222
3.750% 4/01/40		80,000		65,077
3.969% 11/01/47		80,000		62,398
3.999% 11/01/49		20,000		15,608
4.000% 8/15/47		20,000		15,717
4.000% 3/01/48		50,000		39,232
4.150% 10/15/28		180,000		174,255
4.250% 10/15/30		190,000		182,201
4.250% 1/15/33		20,000		18,698
4.950% 10/15/58		10,000		8,949
6.500% 11/15/35		41,000		44,748
CSC Holdings LLC
4.125% 12/01/30 (b)		210,000		135,732
4.500% 11/15/31 (b)		200,000		129,044
6.500% 2/01/29 (b)		250,000		182,471
DISH DBS Corp.
5.250% 12/01/26 (b)		120,000		94,655
5.750% 12/01/28 (b)		120,000		83,198
Fox Corp.
5.476% 1/25/39		90,000		85,805

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
6.500% 10/13/33	$	120,000	$	125,702
Time Warner Cable Enterprises LLC
8.375% 7/15/33		20,000		22,097
Time Warner Cable LLC
6.550% 5/01/37		50,000		47,350
6.750% 6/15/39		120,000		116,084
7.300% 7/01/38		100,000		101,196
Virgin Media Secured Finance PLC
5.500% 5/15/29 (b)		210,000		191,972
Walt Disney Co.
6.200% 12/15/34		20,000		21,731
6.650% 11/15/37		50,000		56,212
				4,967,431
Mining — 0.6%
Anglo American Capital PLC
4.750% 4/10/27 (b)		230,000		225,748
Barrick North America Finance LLC
5.700% 5/30/41		80,000		79,062
5.750% 5/01/43		80,000		79,384
BHP Billiton Finance USA Ltd.
5.000% 9/30/43		100,000		93,305
First Quantum Minerals Ltd.
6.875% 10/15/27 (b)		230,000		224,700
8.625% 6/01/31 (b)		200,000		199,664
Freeport-McMoRan, Inc.
4.550% 11/14/24		10,000		9,948
4.625% 8/01/30		120,000		115,441
5.450% 3/15/43		416,000		395,129
Glencore Funding LLC
3.875% 10/27/27 (b)		90,000		85,886
4.000% 3/27/27 (b)		270,000		260,270
Southern Copper Corp.
5.250% 11/08/42		450,000		420,153
				2,188,690
Miscellaneous - Manufacturing — 0.0%
Eaton Corp.
4.150% 11/02/42		40,000		33,986
Multi-National — 0.4%
Inter-American Development Bank
7.350% 10/06/30 INR (f)		114,000,000		1,384,269
Oil & Gas — 1.9%
BP Capital Markets America, Inc.
3.000% 2/24/50		320,000		208,259
3.588% 4/14/27		100,000		96,164
3.633% 4/06/30		120,000		111,816
Chevron Corp.
1.995% 5/11/27		110,000		101,636
3.078% 5/11/50		20,000		13,651
ConocoPhillips Co.
6.950% 4/15/29		75,000		81,293
Continental Resources, Inc.
2.268% 11/15/26 (b)		70,000		64,990
4.375% 1/15/28		130,000		124,982

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
5.750% 1/15/31 (b)	$	240,000	$	235,986
Coterra Energy, Inc.
3.900% 5/15/27		310,000		298,198
4.375% 3/15/29		220,000		210,384
Devon Energy Corp.
4.750% 5/15/42		10,000		8,374
5.000% 6/15/45		410,000		349,491
5.250% 10/15/27		32,000		31,899
5.600% 7/15/41		140,000		130,243
5.850% 12/15/25		120,000		120,298
5.875% 6/15/28		26,000		26,084
7.875% 9/30/31		330,000		372,904
Diamondback Energy, Inc.
3.250% 12/01/26		10,000		9,556
3.500% 12/01/29		160,000		147,551
Ecopetrol SA
5.875% 5/28/45		770,000		551,999
EOG Resources, Inc.
3.900% 4/01/35		200,000		179,037
4.375% 4/15/30		60,000		58,550
4.950% 4/15/50		140,000		128,356
EQT Corp.
3.900% 10/01/27		280,000		267,624
7.000% STEP 2/01/30 (c)		50,000		53,061
Exxon Mobil Corp.
3.482% 3/19/30		190,000		177,139
4.114% 3/01/46		200,000		165,231
4.327% 3/19/50		20,000		16,843
KazMunayGas National Co. JSC
5.375% 4/24/30 (b) (c)		200,000		194,820
Occidental Petroleum Corp.
4.400% 4/15/46		70,000		54,940
4.625% 6/15/45		80,000		63,229
6.600% 3/15/46 (c)		660,000		688,534
Petrobras Global Finance BV
5.999% 1/27/28 (c)		780,000		778,881
Petroleos Mexicanos
6.875% 8/04/26		160,000		156,684
Pioneer Natural Resources Co.
1.125% 1/15/26		40,000		37,514
2.150% 1/15/31		190,000		159,520
Reliance Industries Ltd.
3.625% 1/12/52 (b)		330,000		230,712
Shell International Finance BV
2.750% 4/06/30		160,000		142,669
3.250% 4/06/50		190,000		131,904
4.000% 5/10/46		180,000		144,770
4.550% 8/12/43		70,000		62,383
Southwestern Energy Co.
4.750% 2/01/32		60,000		55,196
5.375% 3/15/30		20,000		19,322
				7,262,677
Oil & Gas Services — 0.0%
Halliburton Co.
4.850% 11/15/35		20,000		19,023
5.000% 11/15/45		110,000		99,576

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Schlumberger Holdings Corp.
3.900% 5/17/28 (b)	$	31,000	$	29,606
				148,205
Packaging & Containers — 0.0%
Ball Corp.
3.125% 9/15/31		100,000		84,578
Pharmaceuticals — 1.6%
AbbVie, Inc.
2.600% 11/21/24		290,000		286,804
2.950% 11/21/26		260,000		247,844
3.200% 11/21/29		540,000		495,505
3.600% 5/14/25		130,000		127,897
3.800% 3/15/25		180,000		177,780
4.250% 11/21/49		20,000		16,667
4.550% 3/15/35		90,000		85,370
4.800% 3/15/29		150,000		149,420
4.875% 11/14/48		20,000		18,374
4.950% 3/15/31		60,000		59,844
5.050% 3/15/34		90,000		89,737
Becton Dickinson & Co.
4.685% 12/15/44		18,000		15,859
Bristol-Myers Squibb Co.
2.900% 7/26/24		206,000		205,591
3.400% 7/26/29		19,000		17,705
5.100% 2/22/31		80,000		80,307
5.200% 2/22/34		230,000		229,531
5.550% 2/22/54		30,000		29,576
5.650% 2/22/64		40,000		39,074
Cigna Group
4.375% 10/15/28		160,000		155,371
4.800% 8/15/38		190,000		174,581
4.900% 12/15/48		100,000		87,891
CVS Health Corp.
1.875% 2/28/31		30,000		24,071
2.125% 9/15/31		140,000		112,398
3.750% 4/01/30		150,000		138,041
4.125% 4/01/40		120,000		96,943
4.250% 4/01/50		30,000		22,822
4.300% 3/25/28		168,000		162,224
5.050% 3/25/48		280,000		241,250
5.125% 7/20/45		100,000		88,006
CVS Pass-Through Trust
5.880% 1/10/28		41,759		40,866
6.036% 12/10/28		40,993		41,095
6.943% 1/10/30		24,575		24,839
Eli Lilly & Co.
4.700% 2/09/34		200,000		196,105
5.000% 2/09/54		30,000		28,649
5.100% 2/09/64		160,000		152,816
Johnson & Johnson
3.625% 3/03/37		180,000		157,096
Merck & Co., Inc.
1.450% 6/24/30		120,000		99,283
2.750% 12/10/51		200,000		125,037
Pfizer, Inc.
1.700% 5/28/30		250,000		210,430

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Teva Pharmaceutical Finance Netherlands III BV
3.150% 10/01/26	$	900,000	$	844,684
7.125% 1/31/25		390,000		390,944
				5,988,327
Pipelines — 2.0%
Blue Racer Midstream LLC/Blue Racer Finance Corp.
7.250% 7/15/32 (b)		60,000		61,689
Cameron LNG LLC
2.902% 7/15/31 (b)		40,000		34,432
3.302% 1/15/35 (b)		130,000		107,045
Cheniere Energy Partners LP
3.250% 1/31/32		170,000		145,099
Columbia Pipelines Operating Co. LLC
6.036% 11/15/33 (b)		260,000		265,699
6.544% 11/15/53 (b)		40,000		42,148
El Paso Natural Gas Co. LLC
8.375% 6/15/32		199,000		230,180
Energy Transfer LP
2.900% 5/15/25		170,000		165,831
3.750% 5/15/30		410,000		377,161
4.950% 6/15/28		50,000		49,339
5.250% 4/15/29		80,000		79,683
5.300% 4/01/44		20,000		17,992
5.400% 10/01/47		40,000		35,784
5.550% 5/15/34		100,000		98,968
6.100% 2/15/42		140,000		136,959
6.250% 4/15/49		230,000		228,801
5 yr. CMT + 5.694% 6.500% VRN (d)		50,000		49,318
5 yr. CMT + 5.134% 6.750% VRN (d)		160,000		159,191
5 yr. CMT + 5.306% 7.125% VRN (d)		150,000		148,581
Enterprise Products Operating LLC
3.700% 1/31/51		260,000		191,671
4.150% 10/16/28		900,000		870,044
4.850% 1/31/34		220,000		213,642
3 mo. USD Term SOFR + 2.832% 5.375% VRN 2/15/78		40,000		37,360
5.700% 2/15/42		40,000		40,018
EQM Midstream Partners LP
5.500% 7/15/28		10,000		9,847
Kinder Morgan Energy Partners LP
5.500% 3/01/44		30,000		27,712
MPLX LP
4.500% 4/15/38		70,000		61,037
4.700% 4/15/48		210,000		172,735
4.800% 2/15/29		190,000		186,236
4.875% 12/01/24		90,000		89,615
5.500% 2/15/49		40,000		36,898
ONEOK, Inc.
5.550% 11/01/26		50,000		50,204
5.800% 11/01/30		80,000		81,888
6.050% 9/01/33		140,000		144,142
6.625% 9/01/53		220,000		234,770
Southern Natural Gas Co. LLC
8.000% 3/01/32 (c)		148,000		168,066
Targa Resources Corp.
4.200% 2/01/33		60,000		53,951
4.950% 4/15/52		40,000		34,087

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Targa Resources Partners LP/Targa Resources Partners Finance Corp.
4.875% 2/01/31	$	130,000	$	124,053
Transcontinental Gas Pipe Line Co. LLC
7.850% 2/01/26		60,000		61,728
Venture Global Calcasieu Pass LLC
3.875% 11/01/33 (b)		80,000		68,169
Western Midstream Operating LP
3.100% STEP 2/01/25		240,000		235,862
4.050% STEP 2/01/30		850,000		790,541
5.250% STEP 2/01/50		230,000		201,595
5.500% 8/15/48		20,000		17,384
Williams Cos., Inc.
3.750% 6/15/27		90,000		86,382
5.150% 3/15/34		170,000		165,857
7.500% 1/15/31		200,000		220,967
7.750% 6/15/31		350,000		386,344
				7,496,705
Real Estate Investment Trusts (REITS) — 0.1%
GLP Capital LP/GLP Financing II, Inc.
5.250% 6/01/25		10,000		9,916
5.375% 4/15/26		40,000		39,673
Service Properties Trust
8.375% 6/15/29		90,000		88,471
WEA Finance LLC/Westfield UK & Europe Finance PLC
3.750% 9/17/24 (b)		220,000		218,360
				356,420
Retail — 0.3%
Costco Wholesale Corp.
1.375% 6/20/27		190,000		172,583
1.600% 4/20/30		110,000		92,460
Home Depot, Inc.
2.700% 4/15/30		70,000		62,361
3.300% 4/15/40		120,000		93,477
3.350% 4/15/50		190,000		134,943
3.900% 12/06/28		30,000		28,981
3.900% 6/15/47		40,000		31,551
Lowe's Cos., Inc.
4.500% 4/15/30		50,000		48,521
McDonald's Corp.
3.500% 7/01/27		100,000		95,831
3.600% 7/01/30		190,000		175,941
3.625% 9/01/49		40,000		28,994
3.800% 4/01/28		110,000		105,625
4.200% 4/01/50		140,000		111,596
Walmart, Inc.
1.500% 9/22/28		80,000		70,664
1.800% 9/22/31 (c)		40,000		32,958
				1,286,486
Semiconductors — 0.3%
Broadcom, Inc.
3.137% 11/15/35 (b)		340,000		272,268
Intel Corp.
1.600% 8/12/28		130,000		113,790

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3.050% 8/12/51	$	50,000	$	31,716
4.750% 3/25/50		20,000		17,215
5.125% 2/10/30		100,000		100,418
Micron Technology, Inc.
5.300% 1/15/31		100,000		99,775
5.875% 2/09/33		60,000		61,293
NVIDIA Corp.
3.700% 4/01/60		170,000		128,556
NXP BV/NXP Funding LLC/NXP USA, Inc.
2.700% 5/01/25		120,000		117,155
Texas Instruments, Inc.
1.750% 5/04/30		110,000		92,932
				1,035,118
Software — 0.2%
Microsoft Corp.
2.921% 3/17/52		27,000		18,329
Oracle Corp.
1.650% 3/25/26		240,000		224,963
2.875% 3/25/31		280,000		241,773
2.950% 4/01/30		20,000		17,787
3.600% 4/01/50		10,000		6,999
4.650% 5/06/30		100,000		97,987
Salesforce, Inc.
3.700% 4/11/28		50,000		48,199
				656,037
Telecommunications — 1.2%
AT&T, Inc.
2.250% 2/01/32		20,000		16,224
2.300% 6/01/27		250,000		231,263
2.550% 12/01/33		60,000		47,709
3.500% 9/15/53		130,000		88,249
3.550% 9/15/55		183,000		123,377
3.650% 9/15/59		60,000		40,237
3.800% 12/01/57		10,000		6,986
4.350% 6/15/45		101,000		83,755
5.350% 9/01/40		40,000		38,340
5.550% 8/15/41		40,000		38,965
Rogers Communications, Inc.
5.300% 2/15/34		130,000		127,563
T-Mobile USA, Inc.
2.250% 2/15/26		70,000		66,471
2.250% 11/15/31		70,000		57,211
2.550% 2/15/31		130,000		110,354
2.625% 2/15/29		170,000		152,264
2.875% 2/15/31		170,000		147,426
3.000% 2/15/41		60,000		42,933
3.300% 2/15/51		20,000		13,502
3.375% 4/15/29		70,000		64,643
3.500% 4/15/25		350,000		344,105
3.500% 4/15/31		380,000		341,398
3.750% 4/15/27		50,000		48,058
3.875% 4/15/30		190,000		177,617
5.150% 4/15/34		90,000		88,458
Telefonica Emisiones SA
5.213% 3/08/47		150,000		132,487

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Verizon Communications, Inc.
1.750% 1/20/31	$	280,000	$	226,596
2.550% 3/21/31		282,000		239,590
2.650% 11/20/40		120,000		82,653
3.400% 3/22/41		40,000		30,588
3.850% 11/01/42		40,000		31,726
3.875% 2/08/29		130,000		123,558
4.000% 3/22/50		100,000		77,891
4.329% 9/21/28		440,000		427,833
4.400% 11/01/34		270,000		250,193
4.500% 8/10/33		30,000		28,203
5.250% 3/16/37		170,000		167,931
5.500% 3/16/47		30,000		29,970
Vmed O2 UK Financing I PLC
4.750% 7/15/31 (b)		200,000		168,675
				4,515,002
Transportation — 0.1%
Union Pacific Corp.
2.150% 2/05/27		50,000		46,573
2.891% 4/06/36		270,000		217,497
3.750% 2/05/70		150,000		104,675
3.839% 3/20/60		120,000		88,110
				456,855
TOTAL CORPORATE DEBT (Cost $99,856,108)				91,833,051
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 7.7%
Automobile Asset-Backed Securities — 0.2%
Avis Budget Rental Car Funding AESOP LLC
Series 2024-3A, Class A, 5.230% 12/20/30 (b)		430,000		425,628
Series 2024-1A, Class A, 5.360% 6/20/30 (b)		480,000		481,328
				906,956
Commercial Mortgage-Backed Securities — 2.6%
Arbor Realty Commercial Real Estate Notes Ltd., Series 2021-FL3, Class A, 1 mo. USD Term SOFR + 1.184%
6.513% FRN 8/15/34 (b)		511,510		506,703
Bank
Series 2017-BNK4, Class XA, 1.495% VRN 5/15/50 (e)		2,962,805		82,039
Series 2017-BNK8, Class A3, 3.229% 11/15/50		266,465		249,457
Series 2022-BNK40, Class A4, 3.506% VRN 3/15/64 (e)		270,000		237,408
Bank5 Trust, Series 2024-5YR6, Class C,
7.199% VRN 5/15/57 (e)		230,000		234,025
Benchmark Mortgage Trust, Series 2021-B29, Class XA,
1.138% VRN 9/15/54 (e)		2,488,940		110,721
BPR Trust
Series 2021-TY, Class A, 1 mo. USD Term SOFR + 1.164% 6.494% FRN 9/15/38 (b)		140,000		138,862
Series 2022-OANA, Class A, 1 mo. USD Term SOFR + 1.898% 7.227% FRN 4/15/37 (b)		170,000		170,000
BX Commercial Mortgage Trust
Series 2021-VINO, Class A, 1 mo. USD Term SOFR + 0.767% 6.096% FRN 5/15/38 (b)		598,389		590,909

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2021-21M, Class A, 1 mo. USD Term SOFR + 0.844% 6.174% FRN 10/15/36 (b)	$	654,667	$	646,483
Series 2024-XL5, Class A, 1 mo. USD Term SOFR + 1.392% 6.721% FRN 3/15/41 (b)		182,207		181,068
Series 2023-XL3, Class A, 1 mo. USD Term SOFR + 1.761% 7.090% FRN 12/09/40 (b)		240,000		239,700
Series 2024-KING, Class E, 1 mo. USD Term SOFR + 3.688% 9.017% FRN 5/15/34 (b)		380,000		378,110
BX Trust, Series 2021-LBA, Class AV, 1 mo. USD Term SOFR + 0.914%
6.244% FRN 2/15/36 (b)		197,702		195,355
CD Mortgage Trust, Series 2017-CD3, Class A4
3.631% 2/10/50		130,000		120,738
Citigroup Commercial Mortgage Trust, Series 2014-GC23, Class B,
4.175% VRN 7/10/47 (e)		350,000		345,051
Credit Suisse Mortgage Trust
Series 2014-USA, Class A2, 3.953% 9/15/37 (b)		190,000		166,269
Series 2014-USA, Class E, 4.373% 9/15/37 (b)		140,000		76,609
Series 2017-CHOP, Class G, U.S. (Fed) Prime Rate + 2.294% 10.794% FRN 7/15/32 (b)		750,000		724,328
DBJPM Mortgage Trust, Series 2016-C3, Class A4
2.632% 8/10/49		113,500		107,674
DTP Commercial Mortgage Trust, Series 2023-STE2, Class A,
6.038% VRN 1/15/41 (b) (e)		240,000		239,728
FS Commercial Mortgage Trust, Series 2023-4SZN, Class B,
7.795% VRN 11/10/39 (b) (e)		440,000		454,665
GS Mortgage Securities Corp. II, Series 2024-70P, Class E,
9.263% VRN 3/10/41 (b) (e)		260,000		261,272
GS Mortgage Securities Corp. Trust, Series 2018-SRP5, Class A, 1 mo. USD Term SOFR + 1.847%
7.176% FRN 9/15/31 (b)		489,575		347,907
JPMBB Commercial Mortgage Securities Trust, Series 2015-C31, Class B,
4.777% VRN 8/15/48 (e)		160,000		140,678
LAQ Mortgage Trust, Series 2023-LAQ, Class A, 1 mo. USD Term SOFR + 2.091%
7.420% FRN 3/15/36 (b)		30,831		30,822
MSWF Commercial Mortgage Trust, Series 2023-2, Class A5,
6.014% VRN 12/15/56 (e)		280,000		292,873
MTN Commercial Mortgage Trust, Series 2022-LPFL, Class A, 1 mo. USD Term SOFR + 1.397%
6.727% FRN 3/15/39 (b)		190,000		187,684
NJ Trust, Series 2023-GSP, Class A,
6.697% VRN 1/06/29 (b) (e)		220,000		226,831
NRTH Mortgage Trust, Series 2024-PARK, Class A, 1 mo. USD Term SOFR + 1.641%
6.970% FRN 3/15/41 (b)		290,000		289,275
PFP Ltd., Series 2021-8, Class A, 1 mo. USD Term SOFR + 1.114%
6.445% FRN 8/09/37 (b)		126,807		125,222
Shops at Crystals Trust, Series 2016-CSTL, Class A
3.126% 7/05/36 (b)		320,000		302,856
UBS Commercial Mortgage Trust
Series 2017-C7, Class A3, 3.418% 12/15/50		150,502		142,562
Series 2017-C1, Class A4, 3.460% 6/15/50		170,000		159,790
Wells Fargo Commercial Mortgage Trust
Series 2019-C52, Class XA, 1.735% VRN 8/15/52 (e)		5,308,377		319,547
Series 2017-C42, Class D, 2.800% VRN 12/15/50 (b) (e)		710,000		520,082
WFRBS Commercial Mortgage Trust
Series 2014-C24, Class B, 4.204% VRN 11/15/47 (e)		190,000		179,122

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2014-C24, Class C, 4.290% VRN 11/15/47 (e)	$	190,000	$	175,693
				9,898,118
Home Equity Asset-Backed Securities — 0.4%
Asset-Backed Securities Corp. Home Equity Loan Trust, Series 2003-HE6, Class A3B, 1 mo. USD Term SOFR + 1.074%
6.420% FRN 11/25/33		1,150,827		1,160,889
GSAA Home Equity Trust, Series 2006-5, Class 2A3, 1 mo. USD Term SOFR + 0.654%
6.000% FRN 3/25/36		283,124		135,353
Structured Asset Investment Loan Trust, Series 2004-8, Class A9, 1 mo. USD Term SOFR + 1.114%
6.460% FRN 9/25/34		318,460		321,491
				1,617,733
Other Asset-Backed Securities — 1.8%
AB BSL CLO 4 Ltd., Series 2023-4A, Class A, 3 mo. USD Term SOFR + 2.000%
7.325% FRN 4/20/36 (b)		220,000		221,756
ARES Loan Funding IV Ltd., Series 2023-ALF4A, Class A1, 3 mo. USD Term SOFR + 1.750%
7.079% FRN 10/15/36 (b)		490,000		493,549
Birch Grove CLO 4 Ltd., Series 2022-4A, Class A1R, 3 mo. USD Term SOFR + 1.480%
6.819% FRN 7/15/37 (b)		190,000		190,000
Birch Grove CLO 7 Ltd., Series 2023-7A, Class A1, 3 mo. USD Term SOFR + 1.800%
7.178% FRN 10/20/36 (b)		220,000		221,532
Cayuga Park CLO Ltd., Series 2020-1A, Class AR, 3 mo. USD Term SOFR + 1.382%
6.699% FRN 7/17/34 (b)		220,000		220,204
Dividend Solar Loans LLC, Series 2019-1, Class A
3.670% 8/22/39 (b)		596,224		514,639
Dryden 55 CLO Ltd., Series 2018-55A, Class A1, 3 mo. USD Term SOFR + 1.282%
6.610% FRN 4/15/31 (b)		244,921		245,075
Elmwood CLO 29 Ltd., Series 2024-5A, Class AR1, 3 mo. USD Term SOFR + 1.520%
6.841% FRN 4/20/37 (b)		190,000		191,024
Elmwood CLO I Ltd., Series 2019-1A, Class A1RR, 3 mo. USD Term SOFR + 1.520%
6.831% FRN 4/20/37 (b)		210,000		211,453
Empower CLO Ltd., Series 2023-2A, Class A1, 3 mo. USD Term SOFR + 2.200%
7.529% FRN 7/15/36 (b)		290,000		293,476
HPS Loan Management Ltd., Series 15A-19, Class A1R, 3 mo. USD Term SOFR + 1.320%
6.645% FRN 1/22/35 (b)		250,000		250,187
InStar Leasing III LLC, Series 2021-1A, Class A
2.300% 2/15/54 (b)		534,870		475,716
ITE Rail Fund Levered LP, Series 2021-1A, Class A
2.250% 2/28/51 (b)		667,842		596,869
Mosaic Solar Loan Trust, Series 2021-3A, Class B
1.920% 6/20/52 (b)		667,403		520,695
Neuberger Berman CLO XX Ltd., Series 2015-20A, Class ARR, 3 mo. USD Term SOFR + 1.422%
6.750% FRN 7/15/34 (b)		250,000		250,259

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Octagon 66 Ltd., Series 2022-1A, Class A1R, 3 mo. USD Term SOFR + 1.750%
7.077% FRN 11/16/36 (b)	$	400,000	$	403,000
Rad CLO 22 Ltd., Series 2023-22A, Class A1, 3 mo. USD Term SOFR + 1.830%
7.202% FRN 1/20/37 (b)		430,000		435,104
Storm King Park CLO Ltd., Series 2022-1A, Class A1, 3 mo. USD Term SOFR + 2.050%
7.379% FRN 10/15/35 (b)		250,000		250,886
Symphony CLO 40 Ltd., Series 2023-40A, Class A1, 3 mo. USD Term SOFR + 1.640%
6.969% FRN 1/14/34 (b)		410,000		410,940
US Small Business Administration
Series 2019-25G, Class 1, 2.690% 7/01/44		168,942		150,282
Series 2019-20D, Class 1, 2.980% 4/01/39		110,567		99,333
Whitebox CLO I Ltd., Series 2019-1A, Class A1RR, 3 mo. USD Term SOFR + 1.320%
6.659% FRN 7/24/36 (b)		330,000		330,000
Whitebox CLO II Ltd., Series 2020-2A, Class A1R, 3 mo. USD Term SOFR + 1.482%
6.805% FRN 10/24/34 (b)		150,000		150,190
				7,126,169
Student Loans Asset-Backed Securities — 0.4%
College Avenue Student Loans LLC, Series 2019-A, Class A2
3.280% 12/28/48 (b)		189,880		175,858
Navient Private Education Refi Loan Trust
Series 2020-FA, Class A, 1.220% 7/15/69 (b)		220,734		200,278
Series 2020-IA, Class A1A, 1.330% 4/15/69 (b)		276,018		245,674
SMB Private Education Loan Trust
Series 2020-A, Class A2A, 2.230% 9/15/37 (b)		297,993		280,135
Series 2021-A, Class B, 2.310% 1/15/53 (b)		538,269		505,674
				1,407,619
Whole Loan Collateral Collateralized Mortgage Obligations — 2.2%
Bear Stearns Asset-Backed Securities I Trust, Series 2005-AC8, Class A3, 1 mo. USD Term SOFR + 7.536%
2.190% FRN 11/25/35		607,327		105,296
BRAVO Residential Funding Trust
Series 2022-NQM3, Class A1, 5.108% VRN 7/25/62 (b) (e)		278,056		276,069
Series 2024-NQM3, Class A1, 6.191% STEP 3/25/64 (b)		491,977		493,323
Citigroup Mortgage Loan Trust, Series 2007-6, Class 2A4, 1 mo. USD Term SOFR + 0.464%
5.789% FRN 5/25/37		1,170,220		611,717
GSMSC Resecuritization Trust, Series 2014-2R, Class 3B
0.702% 11/26/37 (b) (e)		986,136		868,223
GSR Mortgage Loan Trust, Series 2005-AR5, Class 2A3,
4.931% VRN 10/25/35 (e)		43,881		23,347
HOMES Trust, Series 2023-NQM1, Class A1,
6.182% STEP 1/25/68 (b)		442,835		443,307
IndyMac INDX Mortgage Loan Trust, Series 2005-AR18, Class 1A1, 1 mo. USD Term SOFR + 0.734%
6.080% FRN 10/25/36		648,515		279,006
JP Morgan Mortgage Trust, Series 2018-3, Class A1,
3.500% VRN 9/25/48 (b) (e)		215,914		187,668
Morgan Stanley Residential Mortgage Loan Trust
Series 2024-INV2, Class A1, 6.500% VRN 2/25/54 (b) (e)		468,685		471,413

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2024-INV3, Class A1, 6.500% VRN 6/25/54 (b) (e)	$	400,000	$	402,328
New Residential Mortgage Loan Trust
Series 2018-RPL1, Class M2, 3.500% VRN 12/25/57 (b) (e)		730,000		604,148
Series 2017-4A, Class A1, 4.000% VRN 5/25/57 (b) (e)		176,005		164,069
OBX Trust
Series 2022-NQM6, Class A1, 4.700% STEP 7/25/62 (b)		450,326		440,744
Series 2024-NQM1, Class A1, 5.928% STEP 11/25/63 (b)		442,457		441,487
Series 2023-NQM3, Class A1, 5.949% STEP 2/25/63 (b)		414,615		413,985
Prime Mortgage Trust, Series 2006-DR1, Class 2A2
6.000% 5/25/35 (b)		405,591		334,448
PRKCM Trust, Series 2023-AFC1, Class A1,
6.598% STEP 2/25/58 (b)		378,292		380,070
RCKT Mortgage Trust, Series 2024-INV1, Class A1,
6.500% VRN 6/25/54 (b) (e)		600,000		603,492
Structured Adjustable Rate Mortgage Loan Trust, Series 2006-7, Class 1A1,
5.707% VRN 8/25/36 (e)		132,262		90,177
Structured Asset Mortgage Investments II Trust, Series 2005-AR7, Class 4A1, 1 yr. MTA + 2.150%
7.303% FRN 3/25/46		85,317		75,813
Towd Point Mortgage Trust, Series 2017-4, Class B2,
3.668% VRN 6/25/57 (b) (e)		740,000		606,673
				8,316,803
Whole Loan Collateral Planned Amortization Classes — 0.0%
Countrywide Alternative Loan Trust, Series 2006-18CB, Class A6,
6.761% FRN 7/25/36		38,265		29,594
Whole Loan Collateral Support Collateralized Mortgage Obligations — 0.1%
Washington Mutual Mortgage Pass-Through Certificates Trust, Series 2006-AR3, Class A1B, 1 yr. MTA + 1.000%
6.153% FRN 2/25/46		413,053		345,053
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $31,073,128)				29,648,045
SOVEREIGN DEBT OBLIGATIONS — 3.0%
Argentina Republic Government International Bond,
3.500% STEP 7/09/41		110,000		42,778
Brazil Notas do Tesouro Nacional Serie F
10.000% 1/01/27 BRL (f)		3,328,000		543,722
10.000% 1/01/33 BRL (f)		3,703,000		555,171
Colombia Government International Bond
3.250% 4/22/32		430,000		328,942
4.125% 2/22/42		440,000		286,086
Indonesia Government International Bond
5.125% 1/15/45 (b) (c)		220,000		213,675
Israel Government International Bond
2.750% 7/03/30		310,000		261,327
Mexican Bonos
7.750% 11/23/34 MXN (f)		17,120,000		805,253
7.750% 11/13/42 MXN (f)		46,165,600		2,032,800
8.000% 11/07/47 MXN (f)		76,980,000		3,434,625
8.500% 5/31/29 MXN (f)		18,880,000		970,997
Mexico Government International Bond
4.750% 3/08/44		730,000		584,719

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Nigeria Government International Bond
7.143% 2/23/30 (b)	$	210,000	$	182,333
Peruvian Government International Bond
6.550% 3/14/37		210,000		224,070
Provincia de Buenos Aires/Government Bond,
6.375% STEP 9/01/37 (b)		1,884,883		775,158
Republic of Kenya Government International Bond
6.300% 1/23/34 (b)		370,000		276,073
				11,517,729
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $14,067,758)				11,517,729
U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (g) — 38.0%
Collateralized Mortgage Obligations — 2.4%
Federal Home Loan Mortgage Corp. Multifamily Structured Pass-Through Certificates
Series KG06, Class X1, 0.626% VRN 10/25/31 (e)		3,095,439		92,288
Series K741, Class X1, 0.650% VRN 12/25/27 (e)		2,974,521		46,992
Series K124, Class X1, 0.808% VRN 12/25/30 (e)		2,883,135		105,379
Series K094, Class X1, 1.013% VRN 6/25/29 (e)		986,793		35,470
Series K743, Class X1, 1.021% VRN 5/25/28 (e)		3,969,411		119,836
Series KC05, Class X1, 1.363% VRN 6/25/27 (e)		1,526,289		31,502
Series K736, Class X1, 1.405% VRN 7/25/26 (e)		1,998,891		40,101
Series K115, Class X1, 1.424% VRN 6/25/30 (e)		1,388,843		86,438
Series K110, Class X1, 1.811% VRN 4/25/30 (e)		1,387,305		102,942
Federal Home Loan Mortgage Corp. Reference REMICS Series R007, Class ZA 6.000% 5/15/36		43,037		43,819
Federal Home Loan Mortgage Corp. REMICS
Series 3422, Class AI, 0.250% STEP 1/15/38		5,669		41
Series 3621, Class SB, 30 day USD SOFR Average + 6.116% 0.783% FRN 1/15/40		16,504		1,408
Series 4203, Class PS, 30 day USD SOFR Average + 6.136% 0.803% FRN 9/15/42		69,680		4,642
Series 3973, Class SA, 30 day USD SOFR Average + 6.376% 1.043% FRN 12/15/41		103,167		9,890
Series 5092, Class AP, 2.000% 4/25/41		75,308		64,066
Series 5018, Class MI, 2.000% 10/25/50		316,388		41,822
Series 5293, Class IO, 2.000% 3/25/51		915,730		116,444
Series 5085, Class NI, 2.000% 3/25/51		569,613		70,625
Series 5140, Class NI, 2.500% 5/25/49		255,022		36,722
Series 5010, Class IK, 2.500% 9/25/50		189,875		28,928
Series 5010, Class JI, 2.500% 9/25/50		454,384		74,152
Series 5013, Class IN, 2.500% 9/25/50		234,074		40,001
Series 5040, Class IB, 2.500% 11/25/50		132,958		19,831
Series 5274, Class IO, 2.500% 1/25/51		633,845		103,393
Series 5059, Class IB, 2.500% 1/25/51		717,017		124,370
Series 5069, Class MI, 2.500% 2/25/51		71,291		10,326
Series 5377, Class IO, 2.500% 12/25/51		866,832		113,566
Series 4391, Class MZ, 3.000% 9/15/44		267,857		228,797
Series 4793, Class CB, 3.000% 5/15/48		166,952		144,691
Series 4793, Class CD, 3.000% 6/15/48		106,344		92,058
Series 4813, Class CJ, 3.000% 8/15/48		92,095		77,345
Series 5224, Class HL, 4.000% 4/25/52		400,000		353,370
Federal Home Loan Mortgage Corp. STRIPS
Series 353, Class S1, 30 day USD SOFR Average + 5.886% 0.553% FRN 12/15/46		173,136		15,631

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 334, Class S7, 30 day USD SOFR Average + 5.986% 0.653% FRN 8/15/44	$	73,977	$	7,207
Federal National Mortgage Association Grantor Trust Series 2017-T1, Class A 2.898% 6/25/27		99,017		93,052
Federal National Mortgage Association Interest STRIPS
Series 409, Class C2, 3.000% 4/25/27		19,020		549
Series 409, Class C13, 3.500% 11/25/41		43,135		6,231
Series 409, Class C18, 4.000% 4/25/42		49,440		8,335
Series 409, Class C22, 4.500% 11/25/39		31,976		5,980
Federal National Mortgage Association REMICS
Series 2013-124, Class SB, 30 day USD SOFR Average + 5.836% 0.500% FRN 12/25/43		171,111		15,071
Series 2016-61, Class BS, 30 day USD SOFR Average + 5.986% 0.650% FRN 9/25/46		55,938		2,939
Series 2017-76, Class SB, 30 day USD SOFR Average + 5.986% 0.650% FRN 10/25/57		386,485		42,590
Series 2012-133, Class CS, 30 day USD SOFR Average + 6.036% 0.700% FRN 12/25/42		53,218		6,294
Series 2012-134, Class SK, 30 day USD SOFR Average + 6.036% 0.700% FRN 12/25/42		101,239		10,613
Series 2013-54, Class BS, 30 day USD SOFR Average + 6.036% 0.700% FRN 6/25/43		123,694		11,892
Series 2017-85, Class SC, 30 day USD SOFR Average + 6.086% 0.750% FRN 11/25/47		101,233		8,047
Series 2012-35, Class SC, 30 day USD SOFR Average + 6.386% 1.050% FRN 4/25/42		47,465		4,979
Series 2011-87, Class SG, 30 day USD SOFR Average + 6.436% 1.100% FRN 4/25/40		19,994		141
Series 2011-96, Class SA, 30 day USD SOFR Average + 6.436% 1.100% FRN 10/25/41		96,161		6,312
Series 2012-74, Class SA, 30 day USD SOFR Average + 6.536% 1.200% FRN 3/25/42		22,024		1,103
Series 2005-88, Class IP, 1.206% FRN 10/25/35 (e)		16,913		686
Series 2006-28, Class IP, 1.301% VRN 3/25/36 (e)		21,797		1,333
Series 2021-65, Class JA, 2.000% 1/25/46		69,835		59,924
Series 2020-57, Class TA, 2.000% 4/25/50		187,256		157,005
Series 2020-47, Class GZ, 2.000% 7/25/50		324,964		183,324
Series 2023-2, Class CI, 2.000% 10/25/50		915,198		116,067
Series 2020-97, Class AI, 2.000% 1/25/51		169,150		23,437
Series 2006-59, Class IP, 2.007% FRN 7/25/36 (e)		48,323		2,800
Series 2014-6, Class Z, 2.500% 2/25/44		259,424		217,623
Series 2020-56, Class DI, 2.500% 8/25/50		219,643		37,609
Series 2020-74, Class EI, 2.500% 10/25/50		144,339		24,535
Series 2020-89, Class DI, 2.500% 12/25/50		1,002,331		154,375
Series 2021-3, Class QI, 2.500% 2/25/51		752,617		118,709
Series 2012-118, Class VZ, 3.000% 11/25/42		123,533		109,253
Series 2024-18, Class IO, 4.000% 11/25/49		1,461,906		265,519
Series 2011-59, Class NZ, 5.500% 7/25/41		207,405		210,416
Series 2013-9, Class CB, 5.500% 4/25/42		164,459		164,981
Series 2006-118, Class IP1, 5.682% FRN 12/25/36 (e)		43,154		3,633
Series 2006-118, Class IP2, 5.682% FRN 12/25/36 (e)		33,588		1,414
Series 2012-46, Class BA, 6.000% 5/25/42		42,064		42,528
Series 2012-28, Class B, 6.500% 6/25/39		1,742		1,753
Series 2013-9, Class BC, 6.500% 7/25/42		49,688		51,564
Series 2012-51, Class B, 7.000% 5/25/42		34,812		36,650
Federal National Mortgage Association-ACES
Series 2020-M36, Class X1 1.544% 9/25/34 (e)		1,134,337		65,392

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
FREMF Mortgage Trust
Series 2019-KF58, Class B 30 day USD SOFR Average + 2.264% 7.589% 1/25/26 (b)	$	506,574	$	501,804
Government National Mortgage Association
Series 2012-144, Class IO, 0.328% VRN 1/16/53 (e)		1,955,930		12,777
Series 2012-135, Class IO, 0.337% VRN 1/16/53 (e)		2,161,660		34,437
Series 2014-186, Class IO, 0.370% VRN 8/16/54 (e)		326,999		3,158
Series 2017-41, Class IO, 0.570% VRN 7/16/58 (e)		434,809		11,076
Series 2021-60, Class IO, 0.826% VRN 5/16/63 (e)		2,227,098		131,975
Series 2020-91, Class IU, 0.989% VRN 5/16/62 (e)		3,628,870		247,233
Series 2016-113, Class IO, 1.170% VRN 2/16/58 (e)		4,113,234		262,655
Series 2022-3, Class B, 1.850% 2/16/61		200,000		101,557
Series 2023-92, Class AH, 2.000% 6/16/64		699,830		525,867
Series 2013-107, Class AD, 2.802% VRN 11/16/47 (e)		130,266		117,433
Series 2022-196, Class BE, 3.000% VRN 10/16/64 (e)		200,000		136,362
Series 2022-220, Class E, 3.000% VRN 10/16/64 (e)		100,000		74,293
Government National Mortgage Association REMICS
Series 2013-150, Class IA, 0.000% FRN 11/20/42 (e)		14,938		530
Series 2017-H18, Class BI, 0.048% VRN 9/20/67 (e)		2,363,739		82,847
Series 2017-H20, Class IB, 0.252% VRN 10/20/67 (e)		47,020		1,678
Series 2016-135, Class SB, 1 mo. USD Term SOFR + 5.986% 0.657% FRN 10/16/46		93,451		10,630
Series 2016-21, Class ST, 1 mo. USD Term SOFR + 6.036% 0.697% FRN 2/20/46		48,960		4,957
Series 2017-H15, Class KI, 0.884% VRN 7/20/67 (e)		96,319		5,580
Series 2010-85, Class HS, 1 mo. USD Term SOFR + 6.536% 1.197% FRN 1/20/40		463		1
Series 2012-H27, Class AI, 1.725% VRN 10/20/62 (e)		140,633		4,728
Series 2020-181, Class WI, 2.000% 12/20/50		1,243,738		139,535
Series 2021-188, Class PA, 2.000% 10/20/51		459,396		366,520
Series 2022-9, Class GA, 2.000% 1/20/52		160,248		129,317
Series 2020-123, Class NI, 2.500% 8/20/50		357,604		49,166
Series 2020-123, Class IL, 2.500% 8/20/50		127,128		16,563
Series 2020-127, Class IN, 2.500% 8/20/50		138,754		19,168
Series 2020-129, Class IE, 2.500% 9/20/50		145,428		19,749
Series 2020-160, Class IH, 2.500% 10/20/50		150,630		20,928
Series 2020-160, Class YI, 2.500% 10/20/50		583,095		79,629
Series 2020-160, Class VI, 2.500% 10/20/50		216,478		30,097
Series 2021-115, Class MI, 2.500% 5/20/51		292,901		32,475
Series 2022-189, Class PT, 2.500% 10/20/51		271,372		223,070
Series 2013-53, Class OI, 3.500% 4/20/43		212,883		23,598
Series 2020-47, Class MI, 3.500% 4/20/50		229,454		40,673
Series 2020-47, Class NI, 3.500% 4/20/50		66,487		11,866
Series 2014-176, Class IA, 4.000% 11/20/44		31,702		5,871
Series 2015-167, Class OI, 4.000% 4/16/45		39,416		7,408
Series 2016-84, Class IG, 4.500% 11/16/45		183,063		35,513
Series 2018-H07, Class FD, 1 mo. USD Term SOFR + 0.414% 5.737% FRN 5/20/68		110,840		110,169
Series 2010-H28, Class FE, 1 mo. USD Term SOFR + 0.514% 5.837% FRN 12/20/60		35,240		35,089
Series 2020-H13, Class FA, 1 mo. USD Term SOFR + 0.564% 5.887% FRN 7/20/70		184,934		183,069
Series 2020-H13, Class FC, 1 mo. USD Term SOFR + 0.564% 5.887% FRN 7/20/70		44,931		44,469
Series 2011-H08, Class FG, 1 mo. USD Term SOFR + 0.594% 5.917% FRN 3/20/61		32,779		32,690
Series 2011-H09, Class AF, 1 mo. USD Term SOFR + 0.614% 5.937% FRN 3/20/61		15,936		15,886

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2020-H09, Class FL, 1 mo. USD Term SOFR + 1.264% 6.587% FRN 5/20/70	$	356,080	$	358,315
Series 2020-H09, Class NF, 1 mo. USD Term SOFR + 1.364% 6.687% FRN 4/20/70		91,448		92,033
				9,153,195
Pass-Through Securities — 34.9%
Federal Home Loan Mortgage Corp.
Pool #RB5084 1.500% 11/01/40		280,641		228,661
Pool #RB5110 1.500% 5/01/41		625,375		507,786
Pool #RB5117 1.500% 7/01/41		477,287		387,543
Pool #RA4537 1.500% 2/01/51		79,131		59,603
Pool #RB5071 2.000% 9/01/40		58,142		48,798
Pool #SC0093 2.000% 10/01/40		268,672		225,492
Pool #RB5105 2.000% 3/01/41		216,438		181,044
Pool #SC0160 2.000% 7/01/41		225,159		189,464
Pool #RB5121 2.000% 8/01/41		156,825		130,689
Pool #SC0188 2.000% 9/01/41		77,265		64,944
Pool #RB5125 2.000% 9/01/41		787,424		656,194
Pool #RB5131 2.000% 10/01/41		160,265		133,556
Pool #SC0206 2.000% 11/01/41		155,197		130,448
Pool #RB5138 2.000% 12/01/41		244,940		203,583
Pool #RB0714 2.000% 12/01/41		82,374		68,929
Pool #SC0313 2.000% 1/01/42		708,735		589,069
Pool #QK1354 2.000% 2/01/42		82,905		68,907
Pool #RB5145 2.000% 2/01/42		335,197		278,601
Pool #SC0384 2.000% 4/01/42		367,304		307,238
Pool #RB5153 2.000% 4/01/42		257,464		213,349
Pool #SC0319 2.000% 4/01/42		87,440		72,867
Pool #SI2038 2.000% 7/01/50		368,875		291,607
Pool #SD8079 2.000% 7/01/50		226,212		178,828
Pool #RA3882 2.000% 11/01/50		295,452		233,379
Pool #QB8602 2.000% 2/01/51		70,546		56,629
Pool #QB9087 2.000% 2/01/51		335,302		268,314
Pool #QB9482 2.000% 3/01/51		69,589		55,360
Pool #QC0041 2.000% 3/01/51		72,030		57,302
Pool #QC0160 2.000% 3/01/51		60,614		48,296
Pool #QC0161 2.000% 3/01/51		74,023		58,887
Pool #QB9290 2.000% 3/01/51		231,977		184,980
Pool #SD0573 2.000% 4/01/51		131,613		105,566
Pool #QC0885 2.000% 4/01/51		74,371		59,652
Pool #QC1164 2.000% 4/01/51		68,121		54,469
Pool #SD0745 2.000% 11/01/51		82,098		65,312
Pool #840698 5 yr. CMT + 1.285% 2.140% FRN 3/01/47		16,550		15,463
Pool #RB5149 2.500% 3/01/42		83,582		71,845
Pool #RB5154 2.500% 4/01/42		171,018		147,003
Pool #SD7521 2.500% 7/01/50		248,528		207,570
Pool #SD7525 2.500% 10/01/50		130,539		109,027
Pool #QB5092 2.500% 11/01/50		136,800		114,170
Pool #QB5093 2.500% 11/01/50		71,505		59,542
Pool #RA3913 2.500% 11/01/50		406,176		338,985
Pool #RA4175 2.500% 12/01/50		344,575		286,066
Pool #RA4142 2.500% 12/01/50		67,855		56,630
Pool #QC0165 2.500% 3/01/51		69,128		57,887
Pool #QC5830 2.500% 8/01/51		160,280		133,465
Pool #SD2991 2.500% 9/01/51		90,416		75,375
Pool #QC6551 2.500% 9/01/51		79,364		66,086
Pool #QC7411 2.500% 9/01/51		83,711		69,523

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #SD1751 2.500% 10/01/51	$	172,775	$	143,600
Pool #SD7548 2.500% 11/01/51		811,429		676,184
Pool #SD0849 2.500% 1/01/52		81,541		67,874
Pool #RA6562 2.500% 1/01/52		159,585		133,236
Pool #SD7552 2.500% 1/01/52		417,398		346,654
Pool #QD6079 2.500% 2/01/52		84,200		70,048
Pool #QD8675 2.500% 3/01/52		84,037		69,859
Pool #SD7554 2.500% 4/01/52		1,103,640		918,139
Pool #SD5344 2.500% 4/01/52		98,118		80,537
Pool #SD1749 2.500% 4/01/52		266,737		220,778
Pool #841077 1 yr. USD RFUCCT + 1.619% 2.883% FRN 11/01/47		100,545		97,706
Pool #RB5166 3.000% 7/01/42		86,992		77,064
Pool #SC0340 3.000% 9/01/42		175,236		155,237
Pool #ZT1257 3.000% 1/01/46		125,341		111,829
Pool #G67701 3.000% 10/01/46		503,640		441,564
Pool #G60985 3.000% 5/01/47		1,010,245		884,464
Pool #SD7509 3.000% 11/01/49		43,376		37,694
Pool #QC9154 3.000% 10/01/51		84,989		73,523
Pool #SD0781 3.000% 11/01/51		75,461		64,738
Pool #QD7333 3.000% 2/01/52		87,995		75,560
Pool #RA6954 3.000% 3/01/52		86,350		74,121
Pool #QE0399 3.000% 4/01/52		169,916		145,692
Pool #841076 1 yr. USD RFUCCT + 1.627% 3.007% FRN 11/01/48		385,528		364,485
Pool #841081 1 yr. USD RFUCCT + 1.621% 3.103% FRN 2/01/50		165,050		157,620
Pool #ZS9316 3.500% 1/01/38		227,657		213,643
Pool #Q41209 3.500% 6/01/46		108,088		97,882
Pool #SD1936 3.500% 6/01/52		90,769		80,700
Pool #Q19135 4.000% 6/01/43		20,287		19,213
Pool #Q19236 4.000% 6/01/43		14,541		13,749
Pool #Q19985 4.000% 7/01/43		606,854		573,959
Pool #Q19615 4.000% 7/01/43		19,860		18,791
Pool #G67713 4.000% 6/01/48		416,087		388,904
Pool #SD2866 4.000% 7/01/49		89,563		83,602
Pool #SD5352 4.000% 7/01/50		97,795		91,622
Pool #RA7186 4.000% 4/01/52		249,729		230,533
Pool #SD7560 4.000% 2/01/53		269,472		249,580
Pool #U92272 4.500% 12/01/43		2,245		2,191
Pool #SD2792 4.500% 3/01/47		85,418		83,069
Pool #SD1143 4.500% 9/01/50		75,998		72,595
Pool #SD0615 4.500% 1/01/51		79,282		75,980
Pool #SD1807 4.500% 7/01/52		90,571		86,007
Pool #SD8245 4.500% 9/01/52		2,667,029		2,516,783
Pool #SD8257 4.500% 10/01/52		1,876,908		1,771,173
Pool #SD2394 4.500% 11/01/52		89,523		84,648
Pool #SD1775 4.500% 11/01/52		180,025		170,840
Pool #SD2355 4.500% 12/01/52		90,025		85,123
Pool #SD1305 5.000% 7/01/52		390,631		378,247
Pool #SD2374 5.000% 1/01/53		88,289		85,511
Pool #SD2591 5.000% 3/01/53		182,157		177,146
Pool #RA8790 5.000% 4/01/53		189,774		183,960
Pool #RA8694 5.000% 4/01/53		185,084		180,686
Pool #SD3722 5.000% 5/01/53		88,840		86,423
Pool #SD8268 5.500% 11/01/52		6,100,274		6,021,351
Pool #SD2245 5.500% 12/01/52		90,665		89,832
Pool #SD2138 5.500% 1/01/53		93,605		93,057
Pool #SD2723 5.500% 3/01/53		91,348		90,537
Pool #SD2511 5.500% 4/01/53		89,274		88,419
Pool #QG1295 5.500% 4/01/53		95,290		94,248

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #SD2762 5.500% 5/01/53	$	186,957	$	185,356
Pool #SD2756 5.500% 5/01/53		90,475		89,752
Pool #SD3171 5.500% 6/01/53		92,665		91,785
Pool #QG7311 5.500% 7/01/53		94,784		93,865
Pool #RA9437 5.500% 7/01/53		95,365		94,429
Pool #SD3475 5.500% 8/01/53		185,562		183,799
Pool #SD4365 5.500% 9/01/53		94,841		93,969
Pool #QF4924 6.000% 12/01/52		73,402		74,213
Pool #SD3432 6.000% 7/01/53		89,800		90,724
Pool #SD3642 6.000% 9/01/53		186,341		189,177
Pool #SD3737 6.000% 9/01/53		97,129		97,909
Pool #RJ1350 6.000% 4/01/54		99,724		100,556
Pool #G06669 6.500% 9/01/39		6,907		7,203
Pool #G07509 6.500% 9/01/39		6,723		7,043
Pool #QF6690 6.500% 1/01/53		69,803		71,278
Pool #SD2452 6.500% 2/01/53		87,183		89,377
Pool #RA8904 6.500% 4/01/53		167,478		171,640
Pool #RA9081 6.500% 5/01/53		90,121		92,586
Pool #SD2981 6.500% 5/01/53		169,114		172,735
Pool #RJ0954 6.500% 2/01/54		96,984		99,333
Pool #RJ1358 6.500% 4/01/54		99,846		102,265
Pool #G07335 7.000% 3/01/39		14,859		15,850
Federal National Mortgage Association
Pool #MA4473 1.500% 11/01/41		248,046		201,096
Pool #MA4519 1.500% 1/01/42		84,445		68,329
Pool #MA4236 1.500% 1/01/51		159,071		119,517
Pool #MA4280 1.500% 3/01/51		283,705		212,806
Pool #CA7422 2.000% 10/01/40		270,103		226,692
Pool #MA4422 2.000% 9/01/41		78,538		65,449
Pool #MA4474 2.000% 11/01/41		80,475		67,064
Pool #MA4501 2.000% 12/01/41		491,745		408,717
Pool #MA4540 2.000% 2/01/42		248,595		206,621
Pool #MA4586 2.000% 4/01/42		85,622		71,165
Pool #FS4613 2.000% 5/01/42		91,893		76,579
Pool #FS7180 2.000% 5/01/42		96,964		80,592
Pool #FS5191 2.000% 8/01/42		187,192		155,585
Pool #FS7170 2.000% 8/01/42		97,364		81,442
Pool #BQ0254 2.000% 8/01/50		61,615		49,286
Pool #BQ1528 2.000% 9/01/50		61,583		49,260
Pool #BR2641 2.000% 2/01/51		69,624		55,714
Pool #BR2643 2.000% 2/01/51		67,008		53,432
Pool #BR2644 2.000% 2/01/51		65,242		51,943
Pool #BR2664 2.000% 2/01/51		262,516		210,070
Pool #BR3256 2.000% 2/01/51		65,755		52,844
Pool #BR3257 2.000% 2/01/51		68,347		54,864
Pool #BR3286 2.000% 3/01/51		72,430		57,960
Pool #BR4722 2.000% 3/01/51		67,943		54,051
Pool #BR4753 2.000% 3/01/51		76,738		61,360
Pool #BR4756 2.000% 3/01/51		66,575		52,962
Pool #BR5487 2.000% 3/01/51		75,525		60,082
Pool #BR5587 2.000% 3/01/51		74,466		59,333
Pool #BR5633 2.000% 3/01/51		76,477		60,840
Pool #FM6343 2.000% 3/01/51		77,894		61,967
Pool #BQ9453 2.000% 3/01/51		152,652		121,725
Pool #FM6418 2.000% 3/01/51		75,031		60,229
Pool #BR7745 2.000% 4/01/51		69,539		55,603
Pool #BR7744 2.000% 4/01/51		69,299		55,584
Pool #BR8478 2.000% 4/01/51		77,234		61,949

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #BR8518 2.000% 4/01/51	$	72,099	$	57,650
Pool #FS4269 2.000% 10/01/51		183,528		146,116
Pool #FS1014 2.000% 2/01/52		82,841		65,850
Pool #FS1015 2.000% 2/01/52		258,336		205,030
Pool #FS1112 2.000% 3/01/52		167,481		133,916
Pool #MA2749 2.500% 9/01/36		35,561		32,145
Pool #FM3123 2.500% 3/01/38		349,735		316,143
Pool #MA4177 2.500% 11/01/40		55,853		48,429
Pool #CA9358 2.500% 3/01/41		72,312		63,016
Pool #CB0100 2.500% 4/01/41		150,220		131,097
Pool #FS0697 2.500% 2/01/42		159,505		138,901
Pool #MA4571 2.500% 3/01/42		82,537		70,946
Pool #FS0995 2.500% 3/01/42		82,416		71,564
Pool #MA4587 2.500% 4/01/42		84,788		72,882
Pool #FS4471 2.500% 9/01/42		90,709		78,084
Pool #BK2620 2.500% 6/01/50		58,661		48,773
Pool #FM4577 2.500% 10/01/50		185,251		153,795
Pool #BM6623 2.500% 10/01/50		86,521		68,342
Pool #CA7257 2.500% 10/01/50		70,021		58,307
Pool #FM5313 2.500% 10/01/50		76,332		63,157
Pool #FM4899 2.500% 11/01/50		148,925		124,010
Pool #BQ5876 2.500% 11/01/50		75,684		63,022
Pool #BQ8435 2.500% 12/01/50		54,498		45,381
Pool #BQ8482 2.500% 12/01/50		51,908		43,224
Pool #FM6460 2.500% 3/01/51		142,099		118,459
Pool #FM7675 2.500% 6/01/51		189,926		158,270
Pool #FM7676 2.500% 6/01/51		79,217		65,840
Pool #CB1136 2.500% 7/01/51		158,431		130,935
Pool #FM7900 2.500% 7/01/51		152,577		126,812
Pool #CB1301 2.500% 8/01/51		628,334		520,072
Pool #BT3303 2.500% 8/01/51		77,113		64,212
Pool #FS0024 2.500% 9/01/51		71,099		59,448
Pool #FM8864 2.500% 10/01/51		152,122		126,672
Pool #CB2276 2.500% 11/01/51		84,666		69,708
Pool #FS0434 2.500% 11/01/51		79,492		66,566
Pool #FS1104 2.500% 11/01/51		79,246		66,062
Pool #FS8108 2.500% 1/01/52		99,177		81,779
Pool #BU2599 2.500% 1/01/52		81,971		68,193
Pool #FS0366 2.500% 1/01/52		80,917		67,658
Pool #FS0424 2.500% 1/01/52		82,159		68,298
Pool #BV3089 2.500% 2/01/52		80,072		66,563
Pool #FS0523 2.500% 2/01/52		85,615		70,957
Pool #FS0551 2.500% 2/01/52		83,840		69,696
Pool #FS0549 2.500% 2/01/52		258,266		213,565
Pool #FS0835 2.500% 3/01/52		170,708		141,162
Pool #FS6620 2.500% 3/01/52		193,729		160,894
Pool #CB3044 2.500% 3/01/52		87,736		72,715
Pool #FS3368 2.500% 3/01/52		444,877		367,947
Pool #BF0560 2.500% 9/01/61		82,314		65,534
Pool #AM8674 2.810% 4/01/25		50,000		48,929
Pool #MA2320 3.000% 7/01/35		31,943		29,505
Pool #MA2523 3.000% 2/01/36		220,215		202,928
Pool #MA2579 3.000% 4/01/36		158,877		146,404
Pool #MA2773 3.000% 10/01/36		459,806		421,555
Pool #MA4632 3.000% 6/01/42		174,434		154,526
Pool #AQ7306 3.000% 1/01/43		22,655		20,154
Pool #AR1202 3.000% 1/01/43		30,050		26,635
Pool #AR7399 3.000% 6/01/43		16,908		15,056

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #AS0038 3.000% 7/01/43	$	37,542	$	33,442
Pool #AU6735 3.000% 10/01/43		22,975		20,459
Pool #BC1509 3.000% 8/01/46		30,155		26,365
Pool #AS7844 3.000% 9/01/46		53,440		46,723
Pool #BC2817 3.000% 9/01/46		39,410		34,457
Pool #BD8104 3.000% 10/01/46		144,355		126,211
Pool #AL9397 3.000% 10/01/46		60,974		53,310
Pool #BM1565 3.000% 4/01/47		554,017		484,383
Pool #FM8576 3.000% 2/01/50		69,385		60,664
Pool #CA6315 3.000% 7/01/50		85,458		73,649
Pool #FM4311 3.000% 8/01/50		64,377		55,641
Pool #CA7531 3.000% 10/01/50		69,515		60,300
Pool #FM7531 3.000% 5/01/51		61,494		53,034
Pool #FM8577 3.000% 8/01/51		144,908		126,038
Pool #FS0037 3.000% 8/01/51		66,304		57,670
Pool #FM8648 3.000% 9/01/51		73,163		62,996
Pool #CB1878 3.000% 10/01/51		157,250		134,857
Pool #FM9464 3.000% 11/01/51		155,554		134,617
Pool #FS0034 3.000% 12/01/51		79,180		68,721
Pool #BU1421 3.000% 1/01/52		168,988		145,952
Pool #CB2664 3.000% 1/01/52		494,169		425,186
Pool #FS1171 3.000% 1/01/52		404,137		345,448
Pool #FS0240 3.000% 1/01/52		79,161		68,779
Pool #FS0331 3.000% 1/01/52		82,809		71,197
Pool #FS1374 3.000% 3/01/52		26,165		22,284
Pool #FS0751 3.000% 3/01/52		164,830		141,486
Pool #FS1074 3.000% 3/01/52		411,431		356,633
Pool #FS1289 3.000% 3/01/52		81,028		70,426
Pool #CB3234 3.000% 4/01/52		170,115		146,235
Pool #FS8124 3.000% 6/01/52		395,885		341,735
Pool #CB3833 3.000% 6/01/52		87,658		75,244
Pool #MA2110 3.500% 12/01/34		47,809		45,299
Pool #MA2138 3.500% 1/01/35		24,364		23,085
Pool #FM5754 3.500% 3/01/37		42,128		39,916
Pool #890827 3.500% 12/01/37		34,810		32,591
Pool #FM0068 3.500% 2/01/40		174,883		162,697
Pool #FM0071 3.500% 2/01/40		36,088		33,573
Pool #MA1177 3.500% 9/01/42		14,668		13,464
Pool #MA1213 3.500% 10/01/42		90,458		83,038
Pool #AL3026 3.500% 12/01/42		28,560		26,250
Pool #AS6541 3.500% 1/01/46		75,758		68,585
Pool #AL9546 3.500% 11/01/46		141,239		127,866
Pool #MA3210 3.500% 12/01/47		250,146		225,055
Pool #FS5059 3.500% 11/01/48		817,562		739,389
Pool #FM3773 3.500% 11/01/48		334,711		302,602
Pool #FM7100 3.500% 6/01/50		53,162		47,780
Pool #FS1237 3.500% 12/01/51		78,583		70,431
Pool #FS1240 3.500% 12/01/51		80,708		72,033
Pool #FS2296 3.500% 1/01/52		81,822		72,848
Pool #CB2680 3.500% 1/01/52		78,703		70,219
Pool #FS1462 3.500% 1/01/52		81,402		72,957
Pool #FS2707 3.500% 4/01/52		170,172		151,348
Pool #BV5395 3.500% 4/01/52		73,825		66,166
Pool #FS1092 3.500% 4/01/52		250,938		223,367
Pool #FS1454 3.500% 4/01/52		84,371		75,118
Pool #FS1555 3.500% 4/01/52		84,963		75,751
Pool #FS1603 3.500% 5/01/52		85,240		75,744
Pool #BV8546 3.500% 5/01/52		80,888		72,396

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #FS1556 3.500% 5/01/52	$	339,993	$	304,296
Pool #AK8441 4.000% 4/01/42		12,572		11,918
Pool #AO2711 4.000% 5/01/42		9,585		9,060
Pool #AO6086 4.000% 6/01/42		18,006		17,021
Pool #AP0692 4.000% 7/01/42		13,521		12,832
Pool #AP5333 4.000% 7/01/42		138,289		130,599
Pool #AP2530 4.000% 8/01/42		14,521		13,751
Pool #AP4903 4.000% 9/01/42		22,075		20,921
Pool #AP7399 4.000% 9/01/42		34,594		32,678
Pool #AP9229 4.000% 10/01/42		6,632		6,263
Pool #AP9766 4.000% 10/01/42		50,879		48,054
Pool #MA1217 4.000% 10/01/42		65,472		61,913
Pool #MA1253 4.000% 11/01/42		39,909		37,724
Pool #AQ3599 4.000% 11/01/42		12,137		11,467
Pool #AQ7003 4.000% 12/01/42		25,462		24,126
Pool #AQ4555 4.000% 12/01/42		25,799		24,380
Pool #AQ7082 4.000% 1/01/43		32,892		31,114
Pool #AL3508 4.000% 4/01/43		20,973		19,811
Pool #AQ4078 4.000% 6/01/43		19,755		18,727
Pool #AQ4080 4.000% 6/01/43		13,690		12,974
Pool #AT8394 4.000% 6/01/43		21,913		20,707
Pool #AB9683 4.000% 6/01/43		29,981		28,328
Pool #AT9637 4.000% 7/01/43		58,335		55,112
Pool #AT9653 4.000% 7/01/43		45,643		43,126
Pool #AT9657 4.000% 7/01/43		35,536		33,577
Pool #AS0070 4.000% 8/01/43		18,222		17,185
Pool #MA1547 4.000% 8/01/43		20,939		19,755
Pool #FM3049 4.000% 4/01/44		190,806		180,195
Pool #AS4347 4.000% 1/01/45		35,208		33,096
Pool #CA2472 4.000% 10/01/48		81,813		75,524
Pool #MA4626 4.000% 6/01/52		10,955,988		10,058,185
Pool #BF0104 4.000% 2/01/56		69,781		64,146
Pool #BF0183 4.000% 1/01/57		39,919		36,676
Pool #BF0191 4.000% 6/01/57		67,397		61,647
Pool #MA0706 4.500% 4/01/31		7,296		7,181
Pool #MA0734 4.500% 5/01/31		26,142		25,731
Pool #MA0776 4.500% 6/01/31		8,638		8,502
Pool #MA0913 4.500% 11/01/31		6,568		6,465
Pool #MA0939 4.500% 12/01/31		6,786		6,679
Pool #MA1591 4.500% 9/01/43		37,958		36,960
Pool #MA1629 4.500% 10/01/43		32,723		31,860
Pool #MA1664 4.500% 11/01/43		15,820		15,406
Pool #MA1711 4.500% 12/01/43		36,720		35,763
Pool #AL4741 4.500% 1/01/44		14,555		14,177
Pool #890604 4.500% 10/01/44		164,414		158,954
Pool #AS4271 4.500% 1/01/45		19,927		19,290
Pool #CA2047 4.500% 7/01/48		149,077		143,287
Pool #FM1263 4.500% 7/01/49		37,110		35,564
Pool #FS3589 4.500% 1/01/50		362,612		352,606
Pool #FS4480 4.500% 3/01/50		86,736		83,802
Pool #CA5379 4.500% 3/01/50		154,873		148,520
Pool #MA4031 4.500% 5/01/50		63,508		60,526
Pool #FS0067 4.500% 9/01/51		63,121		60,418
Pool #FS2914 4.500% 9/01/52		88,724		84,280
Pool #MA4733 4.500% 9/01/52		3,809,541		3,594,932
Pool #FS3813 4.500% 11/01/52		85,177		80,459
Pool #FS3977 4.500% 11/01/52		91,224		86,256
Pool #FS3836 4.500% 1/01/53		90,256		85,341

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #CB6030 4.500% 4/01/53	$	36,136	$	34,098
Pool #BF0148 4.500% 4/01/56		318,541		302,781
Pool #BF0222 4.500% 9/01/57		336,769		318,534
Pool #BF0301 4.500% 8/01/58		33,010		31,222
Pool #BF0338 4.500% 1/01/59		81,160		76,664
Pool #BZ0874 4.760% 6/01/29		300,000		299,863
Pool #310088 5.000% 6/01/38		16,183		16,175
Pool #FS4570 5.000% 12/01/47		168,252		168,004
Pool #CB3880 5.000% 6/01/52		78,672		76,876
Pool #BW0048 5.000% 7/01/52		79,691		77,299
Pool #CB4103 5.000% 7/01/52		169,816		167,213
Pool #BW9916 5.000% 10/01/52		89,195		86,395
Pool #MA4785 5.000% 10/01/52		1,435,940		1,390,601
Pool #FS3249 5.000% 11/01/52		83,355		80,906
Pool #MA4806 5.000% 11/01/52		6,835,041		6,617,095
Pool #FS5155 5.000% 7/01/53		182,094		178,905
Pool #995072 5.500% 8/01/38		9,251		9,430
Pool #CB5108 5.500% 11/01/52		180,719		178,946
Pool #FS3672 5.500% 2/01/53		186,022		185,185
Pool #FS4166 5.500% 4/01/53		91,840		90,876
Pool #CB6322 5.500% 5/01/53		91,445		90,605
Pool #FS4805 5.500% 5/01/53		95,976		95,109
Pool #FS5647 5.500% 7/01/53		93,837		93,262
Pool #FS5270 5.500% 7/01/53 (h)		93,260		92,462
Pool #FS6451 5.500% 8/01/53		189,732		188,048
Pool #BF0141 5.500% 9/01/56		347,595		349,181
Pool #481473 6.000% 2/01/29		6		6
Pool #FS4000 6.000% 7/01/41		82,280		84,656
Pool #CB5316 6.000% 12/01/52		85,360		86,019
Pool #FS3411 6.000% 1/01/53		83,975		84,754
Pool #FS4132 6.000% 3/01/53		93,182		93,901
Pool #FS4573 6.000% 5/01/53		178,660		180,263
Pool #CB6540 6.000% 6/01/53		278,582		281,865
Pool #CB6753 6.000% 7/01/53		278,211		280,794
Pool #FS5306 6.000% 7/01/53		90,029		91,708
Pool #AL4324 6.500% 5/01/40		43,151		45,154
Pool #CB5497 6.500% 1/01/53		84,964		87,262
Pool #BX7702 6.500% 2/01/53		83,309		85,405
Pool #FS6779 6.500% 12/01/53		91,781		93,947
Pool #CB8226 6.500% 3/01/54		98,922		101,194
Pool #FS7624 6.500% 3/01/54		97,318		99,675
Pool #AE0758 7.000% 2/01/39		22,759		24,206
Government National Mortgage Association
Pool #AB2892 3.000% 9/15/42		67,816		60,823
Pool #AA5649 3.000% 9/15/42		64,002		57,350
Pool #783669 3.000% 9/15/42		120,846		108,452
Pool #AB9108 3.000% 10/15/42		461,525		413,555
Pool #AB9109 3.000% 10/15/42		40,241		36,058
Pool #AB9207 3.000% 11/15/42		34,369		30,797
Pool #784571 3.500% 6/15/48		143,750		131,891
Pool #BS8439 3.500% 5/15/50		114,832		104,078
Pool #487588 6.000% 4/15/29		425		428
Pool #595077 6.000% 10/15/32		146		148
Pool #604706 6.000% 10/15/33		20,697		21,060
Pool #636251 6.000% 3/15/35		3,206		3,270
Pool #782034 6.000% 1/15/36		21,861		22,286
Pool #658029 6.000% 7/15/36		6,083		6,217
Government National Mortgage Association II

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #MA6930 2.000% 10/20/50	$	759,477	$	615,418
Pool #MA7051 2.000% 12/20/50		859,510		696,477
Pool #MA7135 2.000% 1/20/51		537,445		435,502
Pool #MA7192 2.000% 2/20/51		873,777		708,037
Pool #MA7184 2.000% 2/20/51		296,480		232,599
Pool #786726 2.000% 3/20/51		276,422		219,109
Pool #MA7303 2.000% 4/20/51		305,028		239,306
Pool #BS8546 2.500% 12/20/50		68,558		57,072
Pool #MA7136 2.500% 1/20/51		57,846		48,751
Pool #785565 2.500% 6/20/51		156,075		130,073
Pool #785558 2.500% 7/20/51		76,303		63,448
Pool #785568 2.500% 8/20/51		233,047		193,857
Pool #785657 2.500% 10/20/51		481,475		400,509
Pool #785663 2.500% 10/20/51		156,289		130,007
Pool #785667 2.500% 10/20/51		159,317		132,526
Pool #785762 2.500% 11/20/51		83,093		69,119
Pool #785789 2.500% 12/20/51		81,046		67,291
Pool #785821 2.500% 12/20/51		166,545		138,278
Pool #785791 2.500% 12/20/51		161,372		134,033
Pool #MA4068 3.000% 11/20/46		16,742		14,774
Pool #MA7590 3.000% 9/20/51		581,343		507,389
Pool #CJ9477 3.000% 1/20/52		246,451		212,635
Pool #785944 3.000% 2/20/52		82,768		71,566
Pool #786150 3.000% 3/20/52		258,715		223,216
Pool #786843 3.000% 3/20/52		183,722		158,628
Pool #786095 3.000% 4/20/52		84,488		72,394
Pool #786134 3.000% 4/20/52		75,513		64,809
Pool #MA1995 3.500% 6/20/44		42,172		38,761
Pool #MA2678 3.500% 3/20/45		18,231		16,668
Pool #784106 3.500% 1/20/46		48,037		43,859
Pool #MA3597 3.500% 4/20/46		75,773		69,111
Pool #BC4732 3.500% 10/20/47		162,381		146,989
Pool #BD0384 3.500% 10/20/47		122,251		110,663
Pool #784894,Pool #784894 3.500% 2/20/48		189,761		171,359
Pool #MA5465 3.500% 9/20/48		119,940		108,796
Pool #MA5594 3.500% 11/20/48		151,416		137,252
Pool #784825 3.500% 10/20/49		38,243		33,973
Pool #BM7534 3.500% 2/20/50		55,095		49,373
Pool #MA6711 3.500% 6/20/50		286,899		259,615
Pool #MA6997 3.500% 11/20/50		354,590		320,896
Pool #786216 3.500% 6/20/52		87,454		77,580
Pool #MA4511 4.000% 6/20/47		462,616		433,577
Pool #MA4720 4.000% 9/20/47		304,597		285,002
Pool #MA5078 4.000% 3/20/48		249,613		233,399
Pool #MA5763 4.000% 2/20/49		103,668		96,869
Pool #BM9734 4.000% 10/20/49		28,325		26,281
Pool #BM9743 4.000% 11/20/49		32,980		30,601
Pool #BS1728 4.000% 1/20/50		33,107		30,709
Pool #BS1742 4.000% 2/20/50		30,054		27,876
Pool #BS1757 4.000% 3/20/50		29,217		27,100
Pool #BS8420 4.000% 4/20/50		115,233		106,883
Pool #CK9592 4.000% 6/20/52		85,496		78,901
Pool #786429 4.000% 6/20/52		89,842		83,304
Pool #783298 4.500% 4/20/41		67,431		65,758
Pool #783368 4.500% 7/20/41		10,079		9,829
Pool #MA4654 4.500% 8/20/47		102,924		99,533
Pool #MA5138 4.500% 4/20/48		153,779		148,377
Pool #MA5193 4.500% 5/20/48		155,856		150,284

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #MA5265 4.500% 6/20/48	$	211,326	$	203,639
Pool #MA5331 4.500% 7/20/48		34,009		32,772
Pool #MA5711 4.500% 1/20/49		68,061		65,394
Pool #MA5764 4.500% 2/20/49		85,297		81,954
Pool #MA5818 4.500% 3/20/49		254,606		244,628
Pool #786366 4.500% 8/20/52		179,991		171,812
Pool #786335 4.500% 9/20/52		176,466		168,448
Pool #4747 5.000% 7/20/40		41,666		41,624
Pool #MA5194 5.000% 5/20/48		17,349		17,195
Pool #MA5530 5.000% 10/20/48		70,850		69,824
Pool #MA5597 5.000% 11/20/48		34,945		34,439
Pool #MA5653 5.000% 12/20/48		42,763		42,090
Pool #MA5712 5.000% 1/20/49		190,434		187,439
Pool #MA5878 5.000% 4/20/49		17,183		16,934
Pool #MA6287 5.000% 11/20/49		15,289		15,125
Pool #MA6413 5.000% 1/20/50		34,030		33,665
Pool #MA8202 5.000% 8/20/52		87,920		85,768
Pool #786340 5.000% 9/20/52		90,072		88,430
Pool #786474 5.000% 1/20/53		179,399		175,848
Pool #MA8647 5.000% 2/20/53		3,861,892		3,761,327
Pool #MA8725 5.000% 3/20/53		3,909,564		3,810,201
Pool #786709 5.000% 5/20/53		93,662		91,809
Pool #MA8947 5.000% 6/20/53		2,133,378		2,077,824
Pool #787058 5.000% 8/20/53		375,578		367,793
Pool #MA8429 5.500% 11/20/52		264,005		262,217
Pool #MA8648 5.500% 2/20/53		1,570,706		1,559,087
Pool #786535 5.500% 2/20/53		93,161		93,112
Pool #MA8726 5.500% 3/20/53		271,657		269,732
Pool #MA8801 5.500% 4/20/53		4,952,709		4,914,523
Pool #MA8879 5.500% 5/20/53		4,334,229		4,300,811
Pool #MA8948 5.500% 6/20/53		1,383,398		1,373,596
Pool #786831 5.500% 7/20/53		94,677		94,628
Pool #786835 5.500% 8/20/53		192,059		191,659
Pool #786916 5.500% 8/20/53		482,206		481,200
Pool #MA9171 5.500% 9/20/53		4,124,425		4,095,203
Pool #MA9241 5.500% 10/20/53		3,648,134		3,620,006
Pool #MA9488 5.500% 2/20/54		2,523,721		2,505,051
Pool #786963,Pool #786963 6.000% 9/20/53		370,443		376,422
Pool #787228 6.000% 1/20/54		193,318		196,685
Pool #786928 6.500% 9/20/53		90,229		93,519
Pool #787236 6.500% 1/20/54		98,891		101,785
Government National Mortgage Association II, TBA
3.000% 7/20/54 (h)		400,000		348,795
3.500% 7/20/54 (h)		300,000		269,635
6.000% 7/20/54 (h)		500,000		502,149
6.500% 7/20/54 (h)		500,000		506,943
Uniform Mortgage-Backed Security, TBA
2.000% 7/01/54 (h)		800,000		625,688
2.500% 7/01/54 (h)		2,200,000		1,796,781
3.000% 7/01/54 (h)		1,900,000		1,616,782
4.500% 7/01/54 (h)		200,000		188,523
5.500% 7/01/54 (h)		1,800,000		1,775,320
6.000% 7/01/54 (h)		1,500,000		1,504,220
6.500% 7/01/54 (h)		600,000		610,640
				133,936,447
Whole Loans — 0.7%
Federal Home Loan Mortgage Corp. STACR REMICS Trust

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2024-DNA1, Class M2, 30 day USD SOFR Average + 1.950% 7.285% FRN 2/25/44 (b)	$	340,000	$	344,126
Series 2023-DNA2, Class M1A, 30 day USD SOFR Average + 2.100% 7.435% FRN 4/25/43 (b)		227,179		231,491
Series 2022-DNA2, Class M1B, 30 day USD SOFR Average + 2.400% 7.735% FRN 2/25/42 (b)		460,000		471,572
Series 2021-DNA6, Class B1, 30 day USD SOFR Average + 3.400% 8.735% FRN 10/25/41 (b)		260,000		269,385
Series 2022-DNA2, Class M2, 30 day USD SOFR Average + 3.750% 9.085% FRN 2/25/42 (b)		170,000		178,436
Series 2022-DNA3, Class B1, 30 day USD SOFR Average + 5.650% 10.985% FRN 4/25/42 (b)		120,000		130,357
Federal National Mortgage Association Connecticut Avenue Securities
Series 2023-R08, Class 1M2, 30 day USD SOFR Average + 2.500% 7.835% FRN 10/25/43 (b)		260,000		267,776
Series 2022-R07, Class 1M1, 30 day USD SOFR Average + 2.950% 8.285% FRN 6/25/42 (b)		222,165		229,799
Series 2022-R04, Class 1M2, 30 day USD SOFR Average + 3.100% 8.435% FRN 3/25/42 (b)		680,000		707,723
				2,830,665
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $153,324,172)				145,920,307
U.S. TREASURY OBLIGATIONS — 24.7%
U.S. Treasury Bonds & Notes — 24.7%
U.S. Treasury Bonds
2.000% 2/15/50		410,000		248,951
2.375% 5/15/51		730,000		480,737
2.875% 5/15/49		210,000		155,100
3.000% 2/15/48		16,000		12,173
3.000% 2/15/49		570,000		431,674
3.000% 8/15/52		29,880,000		22,484,631
3.625% 2/15/44		20,000		17,315
3.875% 2/15/43		80,000		72,306
4.000% 11/15/42		240,000		221,193
4.125% 8/15/53		570,000		530,876
4.375% 8/15/43		290,000		279,919
4.500% 2/15/44		100,000		98,531
4.750% 11/15/43		5,910,000		5,988,179
4.750% 11/15/53		2,770,000		2,863,488
U.S. Treasury Floating Rate Notes 3 mo. Treasury money market yield + 0.170%
5.475% FRN 10/31/25		10,730,000		10,735,561
U.S. Treasury Inflation-Indexed Notes
1.125% 1/15/33		631,488		584,232
U.S. Treasury Notes
3.750% 12/31/28		210,000		204,581
3.875% 11/30/29		20,000		19,534
3.875% 8/15/33		47,020,000		45,230,673
4.000% 1/31/31		270,000		264,397
4.000% 2/15/34		260,000		252,363
4.125% 3/31/29 (c)		120,000		118,749
4.125% 8/31/30		20,000		19,742
4.250% 2/28/29 (c)		220,000		218,965
4.250% 2/28/31 (c)		1,550,000		1,539,784
4.375% 11/30/30		1,020,000		1,020,717

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
4.500% 3/31/26	$	50,000	$	49,732
4.500% 5/31/29 (c)		40,000		40,266
4.625% 2/28/26		40,000		39,856
4.625% 4/30/29		90,000		91,013
4.750% 7/31/25		60,000		59,783
U.S. Treasury STRIPS Principal
0.000% 5/15/49		1,450,000		461,010
				94,836,031
TOTAL U.S. TREASURY OBLIGATIONS (Cost $97,722,877)				94,836,031
TOTAL BONDS & NOTES (Cost $401,901,998)				379,619,699
TOTAL PURCHASED OPTIONS(#) — 0.0% (Cost $63,065)				147,498
TOTAL LONG-TERM INVESTMENTS (Cost $401,965,063)				379,767,197
		Number of Shares
SHORT-TERM INVESTMENTS — 2.8%
Investment of Cash Collateral from Securities Loaned — 0.7%
State Street Navigator Securities Lending Government Money Market Portfolio (i)		2,455,915		2,455,915
	Principal Amount
Repurchase Agreement — 1.9%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/28/24, 1.600%, due 7/01/24 (j)	$	7,174,705		7,174,705
U.S. Treasury Bill — 0.2%
U.S. Treasury Bill
5.377% 10/29/24 (h) (k)		660,000		648,624
TOTAL SHORT-TERM INVESTMENTS (Cost $10,279,250)				10,279,244
TOTAL INVESTMENTS — 101.6% (Cost $412,244,313) (l)				390,046,441
Other Assets/(Liabilities) — (1.6)%				(6,144,079)
NET ASSETS — 100.0%			$	383,902,362

Forward Sale Commitment — (0.3)%
U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES  — (0.3)%
Pass-Through Securities — (0.3)%
Government National Mortgage Association II, TBA
4.500% 7/20/54 (h)	(200,000	)		(190,114	)
5.000% 7/20/54 (h)	(100,000	)		(97,364	)
Uniform Mortgage-Backed Security, TBA
4.500% 7/01/54 (h)	(800,000	)		(754,094	)
TOTAL FORWARD SALE COMMITMENT (Proceeds $(1,044,578))			$	(1,041,572	)

Abbreviation Legend

CLO Collateralized Loan Obligation

CMT Constant Maturity Treasury Index

FRN Floating Rate Note

LIBOR London InterBank Offered Rate

MTA Monthly Treasury Average Index

REMICS Real Estate Mortgage Investment Conduits

RFUCCT Refinitiv USD IBOR Consumer Cash Fallbacks Term

SOFR Secured Overnight Financing Rate

STEP Step Coupon Bond

STRIPS Separate Trading of Registered Interest and Principal of Securities

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 bank loan commitments at June 30, 2024 where the rate will be determined at time of settlement.

(b) 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 June 30, 2024, the aggregate market value of these securities amounted to $44,363,049 or 11.56% of net assets.

(c) Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2024, was $5,005,583 or 1.30% of net assets. The Fund received $2,671,251 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).

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

(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 June 30, 2024.

(f) The principal amount of the security is in foreign currency. The market value is in U.S. dollars.

(g) 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.

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

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

(j) Maturity value of $7,175,661. Collateralized by U.S. Government Agency obligations with a rate of 5.385%, maturity date of 4/30/26, and an aggregate market value, including accrued interest, of $7,318,386.

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

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

(#) OTC Options Purchased

Description

Counterparty

Expiration Date

Exercise Price

No. of Contracts

Notional Amount

Value

Premiums Paid/(Received)

Unrealized Appreciation (Depreciation)

Call

USD Call MXN Put

Goldman Sachs & Co.

7/09/24

17.23

1,550,000

USD

1,550,000

$

92,535

$

12,648

$

79,887

(#) Exchange-Traded Options Purchased
Description	Expiration Date	Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid/(Received)		Unrealized Appreciation (Depreciation)
Call
U.S. Treasury Bond Future	7/05/24		119.00		18	USD	2,129,625	$	8,156	$	4,796	$	3,360
U.S. Treasury Note 6-7 Year Future	7/05/24		110.50		31	USD	3,409,516		5,813		3,632		2,181
3 Month SOFR Future	9/13/24		95.13		175	USD	41,862,188		9,844		15,680		(5,836)
								$	23,813	$	24,108	$	(295)
Put
3 Month SOFR Future	12/13/24		95.50		28	USD	6,660,150	$	31,150	$	26,309	$	4,841
								$	54,963	$	50,417	$	4,546

OTC Options Written
Description	Counterparty	Expiration Date		Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid/(Received)		Unrealized Appreciation (Depreciation)
Call
USD Call MXN Put	Citigroup Global Markets Inc.		7/09/24		17.36		621,000	USD	621,000	$	(32,603)	$	(13,287)	$	(19,316)
Put
USD Put AUD Call	Goldman Sachs & Co.		7/09/24		0.68		1,550,000	USD	1,550,000	$	(930)	$	(11,176)	$	10,246
										$	33,533	$	(24,463)	$	(9,070)

Exchange-Traded Options Written
Description	Expiration Date	Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid/(Received)		Unrealized Appreciation (Depreciation)
Call
U.S. Treasury Note 10 Year Future	8/23/24		113.50		31	USD	3,409,516	$	(5,328)	$	(6,243)	$	915
3 Month SOFR Future	9/13/24		96.13		175	USD	41,862,188		(4,375)		(4,608)		233
3 Month SOFR Future	9/13/24		96.88		32	USD	7,654,800		(600)		(13,958)		13,358
3 Month SOFR Future	12/13/24		97.13		57	USD	13,558,163		(2,494)		(30,943)		28,449
3 Month SOFR Future	6/13/25		97.00		175	USD	41,862,188		(44,844)		(52,133)		7,289
								$	(57,641)	$	(107,885)	$	50,244
Put
U.S. Treasury Note 10 Year Future	7/26/24		109.50		36	USD	3,959,438	$	(18,563)	$	(16,063)	$	(2,500)
3 Month SOFR Future	12/13/24		95.00		28	USD	6,660,150		(7,525)		(11,491)		3,966
								$	(26,088)	$	(27,554)	$	1,466
								$	(83,729)	$	(135,439)	$	51,710

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
Bank of America N.A.	7/19/24	EUR	1,200,000	USD	1,281,574	$	4,588
Bank of America N.A.	7/19/24	CHF	210,000	USD	230,376		3,837
Bank of America N.A.	7/19/24	USD	3,452,438	EUR	3,221,944		(848)
Bank of America N.A.	7/19/24	USD	620,678	CHF	562,576		(6,763)
Bank of America N.A.	7/19/24	MXN	13,770,000	USD	774,726		(23,997)
BNP Paribas SA	7/19/24	JPY	489,779,083	USD	3,276,038		(223,983)
BNP Paribas SA	7/19/24	CAD	730,000	USD	530,837		2,978
BNP Paribas SA	7/19/24	NOK	12,818,698	USD	1,174,160		26,959
BNP Paribas SA	7/19/24	USD	699,809	CHF	630,000		(2,830)
BNP Paribas SA	7/19/24	USD	425,171	NOK	4,540,000		(229)
BNP Paribas SA	7/19/24	USD	719,216	CAD	980,000		2,587
Citibank N.A.	7/02/24	BRL	3,450,000	USD	641,461		(24,299)
Citibank N.A.	7/02/24	USD	628,653	BRL	3,450,000		11,491
Citibank N.A.	7/11/24	USD	253,000	MXN	4,391,726		13,270
Citibank N.A.	7/18/24	INR	21,650,000	USD	258,929		577
Citibank N.A.	7/19/24	AUD	6,786,180	USD	4,434,524		94,582
Citibank N.A.	7/19/24	GBP	390,000	USD	483,680		9,368
Citibank N.A.	7/19/24	USD	1,711,761	CNH	12,372,265		14,604
Citibank N.A.	7/19/24	USD	2,467,310	MXN	41,203,833		220,912
Citibank N.A.	7/19/24	USD	2,649,154	GBP	2,113,025		(22,188)
Citibank N.A.	7/19/24	USD	1,081,455	AUD	1,630,000		(6,409)
Citibank N.A.	7/19/24	USD	122,822	JPY	19,040,000		4,175
Goldman Sachs International	7/02/24	BRL	6,862,845	USD	1,252,424		(24,746)
Goldman Sachs International	7/02/24	USD	1,255,391	BRL	6,862,845		27,712
Goldman Sachs International	7/19/24	CHF	400,000	USD	439,590		6,530
Goldman Sachs International	7/19/24	USD	113,609	JPY	17,280,000		5,928
Goldman Sachs International	7/19/24	USD	767,779	NOK	8,280,000		(8,061)
Goldman Sachs International	7/19/24	USD	190,622	GBP	150,000		988
Goldman Sachs International	7/19/24	MXN	7,565,000	USD	428,683		(16,246)
Goldman Sachs International	7/19/24	USD	1,657,990	CHF	1,490,000		(3,806)
Goldman Sachs International	7/19/24	USD	771,611	CAD	1,054,235		697
Goldman Sachs International	8/02/24	BRL	3,928,651	USD	717,437		(17,218)
Morgan Stanley & Co. LLC	7/02/24	BRL	1,272,845	USD	241,931		(14,234)
Morgan Stanley & Co. LLC	7/02/24	USD	228,974	BRL	1,272,845		1,278
Morgan Stanley & Co. LLC	7/19/24	CAD	1,879,864	USD	1,368,266		6,391
Morgan Stanley & Co. LLC	7/19/24	BRL	9,468,611	USD	1,846,898		(156,387)
Morgan Stanley & Co. LLC	7/19/24	MXN	2,090,000	USD	119,850		(5,905)
Morgan Stanley & Co. LLC	7/19/24	USD	160,045	MXN	2,715,000		12,025
Morgan Stanley & Co. LLC	7/19/24	USD	969,426	JPY	148,490,000		44,114
Morgan Stanley & Co. LLC	7/19/24	USD	985,491	CAD	1,340,000		5,612
						$	(36,946)

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/Net Unrealized Appreciation (Depreciation)
Long
U.S. Treasury Long Bond	9/19/24		169	$	19,756,316	$	238,497
U.S. Treasury Ultra 10 Year	9/19/24		147		16,436,303		252,791
U.S. Treasury Ultra Bond	9/19/24		77		9,560,894		90,575
UK Long Gilt	9/26/24		22		2,693,733		19,707
U.S. Treasury Note 5 Year	9/30/24		1,485		157,039,350		1,229,165
3 Month SOFR	3/18/25		47		11,233,631		(54,093)
3 Month SOFR	3/17/26		172		41,309,298		(16,398)
						$	1,760,244
Short
Japanese 10 Year Bond	9/12/24		4	$	(3,566,143)	$	14,400
U.S. Treasury Note 10 Year	9/19/24		190		(20,759,622)		(137,409)
U.S. Treasury Ultra 10 Year	9/19/24		26		(2,930,945)		(20,869)
U.S. Treasury Note 2 Year	9/30/24		206		(42,027,343)		(41,720)
						$	(185,598)

Centrally Cleared Credit Default Swaps - Buy Protection

Reference Obligation/Index

Rate Paid by Fund

Payment Frequency

Termination Date

Notional Amount

Value

Upfront Premium Paid/ (Received)

Unrealized Appreciation (Depreciation)

CDX.NA.HY Series 42†

5.000%

Quarterly

6/20/29

USD

1,349,800

$

(84,666)

$

(94,926)

$

10,260

Centrally Cleared Credit Default Swaps - Sell Protection††

Reference Obligation/ Index

Rate Received by Fund

Payment Frequency

Termination Date

Credit Rating

Notional Amount

Value

Upfront Premium Paid/ (Received)

Unrealized Appreciation (Depreciation)

CDX.NA.IG Series 42†

1.000%

Quarterly

6/20/29

BBB*

USD

23,380,000

$

481,441

$

523,561

$

(42,120)

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)
28 Day-MXNTIIE-Banxico	Monthly		Fixed 7.450%		Monthly		7/18/29	MXN	88,370,000	$	(405,770)	$	37,242	$	(443,012)
12-Month USD SOFR	Annually		Fixed 3.650%		Annually		3/18/30	USD	9,070,000		(68,508)		(224,033)		155,525
Fixed 3.870%	Annually		12-Month USD SOFR		Annually		2/28/31	USD	13,369,000		81,985		(35,361)		117,346
Fixed 4.200%	Annually		12-Month USD SOFR		Annually		4/30/31	USD	6,776,000		(107,679)		(64,717)		(42,962)
Fixed 3.050%	Annually		12-Month USD SOFR		Annually		2/15/48	USD	1,200,000		142,528		50,350		92,178
Fixed 3.150%	Annually		12-Month USD SOFR		Annually		5/15/48	USD	5,300,000		546,983		(8,020)		555,003
Fixed 3.510%	Annually		12-Month USD SOFR		Annually		3/18/55	USD	2,291,000		43,893		158,802		(114,909)
										$	233,432	$	(85,737)	$	319,169

OTC Interest Rate Swaps

Paid by the Fund

Received by the Fund

Rate/ Reference

Frequency

Rate/ Reference

Frequency

Counterparty

Termination Date

Notional Amount

Value

Upfront Premium Paid/ (Received)

Unrealized Appreciation (Depreciation)

BRL-CDI

Maturity

Fixed 10.238%

Maturity

Citigroup Global Markets, Inc.

1/02/29

BRL

19,660,000

$

(208,131)

$

—

$

(208,131)

* Rating is determined by Western Asset Management Company and represents a weighted average of the ratings of all securities included in the underlying index for the credit default swap. Ratings used in the weighted average are from Moody's Investors Service, Inc., S&P Global Ratings, or Fitch Ratings, whichever is the highest for each constituent. All ratings are as of the report date and do not reflect subsequent changes.

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

†† For each credit derivative with sold protection, the credit ratings of the entities referenced, as rated by any rating organization, are included in the equivalent S&P Global Ratings or Western Asset Management Company's rating category, as applicable. The reference entity rating represents the likelihood of a potential payment by the Fund if the referenced entity experiences a credit event as of period end. Notional amounts represent the maximum potential amount of future payments (undiscounted) the Fund could be required to make under the credit derivatives with sold protection.

Currency Legend

AUD Australian Dollar

BRL Brazilian Real

CAD Canadian Dollar

CHF Swiss Franc

CNH Offshore Chinese Yuan

EUR Euro

GBP British Pound

INR Indian Rupee

JPY Japanese Yen

MXN Mexican Peso

NOK Norwegian Krone

USD U.S. Dollar

MassMutual Diversified Value Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.4%
COMMON STOCK — 98.4%
Communication Services — 5.3%
AT&T, Inc.		146,700	$	2,803,436
Comcast Corp. Class A		80,200		3,140,632
Fox Corp. Class A		7,700		264,649
Interpublic Group of Cos., Inc.		7,700		223,993
Omnicom Group, Inc.		4,900		439,530
Verizon Communications, Inc.		86,100		3,550,764
				10,423,004
Consumer Discretionary — 8.1%
ADT, Inc.		17,500		133,000
AutoNation, Inc. (a)		1,800		286,884
AutoZone, Inc. (a)		300		889,230
Bath & Body Works, Inc.		4,600		179,630
Best Buy Co., Inc.		4,400		370,876
CarMax, Inc. (a)		2,200		161,348
Crocs, Inc. (a)		900		131,346
Darden Restaurants, Inc.		2,400		363,168
Dick's Sporting Goods, Inc.		700		150,395
Dillard's, Inc. Class A (b)		300		132,117
DR Horton, Inc.		8,000		1,127,440
eBay, Inc.		10,300		553,316
Expedia Group, Inc. (a)		2,600		327,574
Ford Motor Co.		88,200		1,106,028
General Motors Co.		26,200		1,217,252
Gentex Corp.		4,700		158,437
Genuine Parts Co.		1,700		235,144
H&R Block, Inc.		2,900		157,267
Lear Corp.		1,000		114,210
Lennar Corp. Class A		6,300		944,181
Levi Strauss & Co. Class A		769		14,826
Lowe's Cos., Inc.		16,700		3,681,682
MGM Resorts International (a)		6,400		284,416
Murphy USA, Inc.		380		178,395
NVR, Inc. (a)		40		303,543
Penske Automotive Group, Inc.		1,400		208,628
PulteGroup, Inc.		5,900		649,590
PVH Corp.		600		63,522
Ralph Lauren Corp.		900		157,554
Service Corp. International		3,900		277,407
Skechers USA, Inc. Class A (a)		2,400		165,888
Tapestry, Inc.		4,700		201,113
Toll Brothers, Inc.		1,100		126,698
Ulta Beauty, Inc. (a)		1,000		385,870
Williams-Sonoma, Inc.		1,200		338,844

MassMutual Diversified Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Wynn Resorts Ltd.		2,300	$	205,850
				15,982,669
Consumer Staples — 6.3%
Altria Group, Inc.		35,100		1,598,805
BJ's Wholesale Club Holdings, Inc. (a)		1,300		114,192
Bunge Global SA		1,800		192,186
Campbell Soup Co.		6,100		275,659
Coca-Cola Consolidated, Inc.		120		130,200
Conagra Brands, Inc.		9,800		278,516
Dollar General Corp.		4,500		595,035
Dollar Tree, Inc. (a)		4,400		469,788
General Mills, Inc.		11,600		733,816
Ingredion, Inc.		1,300		149,110
Kellanova		7,000		403,760
Kimberly-Clark Corp.		6,300		870,660
Kraft Heinz Co.		22,700		731,394
Kroger Co.		12,900		644,097
Philip Morris International, Inc.		31,800		3,222,294
Sysco Corp.		10,200		728,178
Target Corp.		9,500		1,406,380
				12,544,070
Energy — 9.5%
Antero Midstream Corp.		9,800		144,452
Baker Hughes Co.		15,200		534,584
Cheniere Energy, Inc.		4,100		716,803
Chevron Corp.		32,400		5,068,008
ConocoPhillips		22,800		2,607,864
Coterra Energy, Inc.		15,200		405,384
Devon Energy Corp.		12,900		611,460
EOG Resources, Inc.		13,200		1,661,484
Kinder Morgan, Inc.		45,400		902,098
Marathon Oil Corp.		12,700		364,109
Marathon Petroleum Corp.		7,200		1,249,056
Murphy Oil Corp.		1,600		65,984
Nov, Inc.		4,500		85,545
Occidental Petroleum Corp.		18,100		1,140,843
Phillips 66		8,700		1,228,179
Range Resources Corp.		4,300		144,179
Valero Energy Corp.		7,100		1,112,996
Williams Cos., Inc.		18,600		790,500
				18,833,528
Financials — 30.1%
Aflac, Inc.		12,400		1,107,444
Ally Financial, Inc.		5,000		198,350
American Express Co.		13,600		3,149,080
American Financial Group, Inc.		1,600		196,832
American International Group, Inc.		12,300		913,152
Ameriprise Financial, Inc.		2,000		854,380
Apollo Global Management, Inc.		10,500		1,239,735
Arch Capital Group Ltd. (a)		7,100		716,319
Assurant, Inc.		1,000		166,250
Bank of America Corp.		146,000		5,806,420
Bank of New York Mellon Corp.		15,500		928,295

MassMutual Diversified Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Capital One Financial Corp.		6,600	$	913,770
Carlyle Group, Inc.		6,600		264,990
Chubb Ltd.		7,900		2,015,132
Cincinnati Financial Corp.		2,900		342,490
Citigroup, Inc.		33,100		2,100,526
Citizens Financial Group, Inc.		8,400		302,652
Commerce Bancshares, Inc.		2,500		139,450
Corpay, Inc. (a)		1,300		346,333
Cullen/Frost Bankers, Inc.		1,000		101,630
Discover Financial Services		5,200		680,212
East West Bancorp, Inc.		2,500		183,075
Equitable Holdings, Inc.		7,900		322,794
Fidelity National Financial, Inc.		5,200		256,984
Fifth Third Bancorp		10,500		383,145
First Citizens BancShares, Inc. Class A		260		437,739
Fiserv, Inc. (a)		9,500		1,415,880
Goldman Sachs Group, Inc.		6,200		2,804,384
Hartford Financial Services Group, Inc.		6,300		633,402
Huntington Bancshares, Inc.		27,100		357,178
JP Morgan Chase & Co.		53,200		10,760,232
KeyCorp.		10,100		143,521
Loews Corp.		4,800		358,752
LPL Financial Holdings, Inc.		1,400		391,020
M&T Bank Corp.		2,600		393,536
Markel Group, Inc. (a)		220		346,645
MetLife, Inc.		15,900		1,116,021
Morgan Stanley		31,300		3,042,047
Northern Trust Corp.		3,900		327,522
Old Republic International Corp.		5,500		169,950
PayPal Holdings, Inc. (a)		19,500		1,131,585
PNC Financial Services Group, Inc.		7,400		1,150,552
Primerica, Inc.		600		141,948
Principal Financial Group, Inc.		4,900		384,405
Prudential Financial, Inc.		7,000		820,330
Raymond James Financial, Inc.		3,900		482,079
Regions Financial Corp.		17,100		342,684
Reinsurance Group of America, Inc.		1,100		225,797
Robinhood Markets, Inc. Class A (a)		7,300		165,783
SEI Investments Co.		2,500		161,725
State Street Corp.		6,300		466,200
Stifel Financial Corp.		2,000		168,300
Synchrony Financial		8,000		377,520
T. Rowe Price Group, Inc.		4,200		484,302
Travelers Cos., Inc.		7,900		1,606,386
Unum Group		3,800		194,218
W. R. Berkley Corp.		5,000		392,900
Webster Financial Corp.		3,200		139,488
Wells Fargo & Co.		65,200		3,872,228
Willis Towers Watson PLC		1,900		498,066
				59,533,765
Health Care — 15.5%
AbbVie, Inc.		33,100		5,677,312
Amgen, Inc.		9,800		3,062,010
Cardinal Health, Inc.		5,000		491,600
Cencora, Inc.		4,700		1,058,910
Centene Corp. (a)		9,800		649,740
Cigna Group		6,100		2,016,477

MassMutual Diversified Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
DaVita, Inc. (a)		1,800	$	249,426
Elevance Health, Inc.		5,500		2,980,230
HCA Healthcare, Inc.		7,400		2,377,472
Henry Schein, Inc. (a)		2,300		147,430
Johnson & Johnson		37,100		5,422,536
Labcorp Holdings, Inc.		2,200		447,722
McKesson Corp.		3,700		2,160,948
Medtronic PLC		26,200		2,062,202
Molina Healthcare, Inc. (a)		600		178,380
Quest Diagnostics, Inc.		3,200		438,016
Teleflex, Inc.		1,000		210,330
Tenet Healthcare Corp. (a)		1,900		252,757
United Therapeutics Corp. (a)		900		286,695
Universal Health Services, Inc. Class B		1,600		295,888
Viatris, Inc.		24,400		259,372
				30,725,453
Industrials — 11.7%
Acuity Brands, Inc.		600		144,864
AGCO Corp.		1,300		127,244
Allegion PLC		1,800		212,670
Allison Transmission Holdings, Inc.		900		68,310
Builders FirstSource, Inc. (a)		2,700		373,707
CACI International, Inc. Class A (a)		260		111,834
Caterpillar, Inc.		10,000		3,331,000
CSX Corp.		40,000		1,338,000
Cummins, Inc.		2,800		775,404
Deere & Co.		5,000		1,868,150
Delta Air Lines, Inc.		6,900		327,336
Dover Corp.		2,300		415,035
FedEx Corp.		4,800		1,439,232
Fortune Brands Innovations, Inc.		2,600		168,844
Huntington Ingalls Industries, Inc.		800		197,064
Johnson Controls International PLC		11,700		777,699
L3Harris Technologies, Inc.		3,900		875,862
Leidos Holdings, Inc.		2,400		350,112
Lockheed Martin Corp.		4,960		2,316,816
Masco Corp.		5,800		386,686
Middleby Corp. (a)		1,000		122,610
Oshkosh Corp.		1,300		140,660
Owens Corning		2,300		399,556
PACCAR, Inc.		10,700		1,101,458
Pentair PLC		3,100		237,677
Regal Rexnord Corp.		800		108,176
Robert Half, Inc.		1,800		115,164
RTX Corp.		26,830		2,693,463
Science Applications International Corp.		800		94,040
Snap-on, Inc.		1,100		287,529
Textron, Inc.		5,200		446,472
Timken Co.		1,100		88,143
U-Haul Holding Co. (UHAL US) (a)		300		18,519
U-Haul Holding Co. (UHAL/B US)		4,000		240,080
UFP Industries, Inc.		1,200		134,400
United Airlines Holdings, Inc. (a)		6,700		326,022
United Rentals, Inc.		1,400		905,422
WESCO International, Inc.		1,000		158,520
				23,223,780

MassMutual Diversified Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Information Technology — 5.0%
Amkor Technology, Inc.		4,700	$	188,094
Arrow Electronics, Inc. (a)		1,500		181,140
Cisco Systems, Inc.		37,900		1,800,629
Cognizant Technology Solutions Corp. Class A		10,200		693,600
Corning, Inc.		15,500		602,175
F5, Inc. (a)		1,200		206,676
Gen Digital, Inc.		12,800		319,744
Hewlett Packard Enterprise Co.		29,000		613,930
HP, Inc.		29,000		1,015,580
International Business Machines Corp.		15,000		2,594,250
Jabil, Inc.		3,100		337,249
Microchip Technology, Inc.		8,200		750,300
Skyworks Solutions, Inc.		3,100		330,398
TD SYNNEX Corp.		1,800		207,720
Twilio, Inc. Class A (a)		3,200		181,792
				10,023,277
Materials — 3.1%
Amcor PLC		29,600		289,488
Berry Global Group, Inc.		2,200		129,470
Celanese Corp.		2,100		283,269
CF Industries Holdings, Inc.		3,400		252,008
Cleveland-Cliffs, Inc. (a)		8,700		133,893
Commercial Metals Co.		1,000		54,990
Crown Holdings, Inc.		3,200		238,048
Dow, Inc.		14,400		763,920
Eagle Materials, Inc.		700		152,222
Eastman Chemical Co.		2,400		235,128
Graphic Packaging Holding Co.		6,300		165,123
International Paper Co.		6,000		258,900
LyondellBasell Industries NV Class A		6,700		640,922
Nucor Corp.		6,900		1,090,752
Olin Corp.		2,300		108,445
PPG Industries, Inc.		2,000		251,780
Reliance, Inc.		1,300		371,280
Steel Dynamics, Inc.		4,900		634,550
US Steel Corp.		4,100		154,980
				6,209,168
Real Estate — 0.1%
Jones Lang LaSalle, Inc. (a)		500		102,640
Utilities — 3.7%
CenterPoint Energy, Inc.		7,600		235,448
Consolidated Edison, Inc.		7,100		634,882
Dominion Energy, Inc.		17,200		842,800
Duke Energy Corp.		15,800		1,583,634
Edison International		6,300		452,403
Evergy, Inc.		4,700		248,959
OGE Energy Corp.		4,100		146,370
Pinnacle West Capital Corp.		2,100		160,398
PPL Corp.		15,100		417,515
Public Service Enterprise Group, Inc.		11,700		862,290
Sempra		11,500		874,690

MassMutual Diversified Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Southern Co.		10,500	$	814,485
				7,273,874
TOTAL COMMON STOCK (Cost $161,893,352)				194,875,228
TOTAL EQUITIES (Cost $161,893,352)				194,875,228
EXCHANGE-TRADED FUND — 1.5%
iShares Russell 1000 Value ETF		16,700		2,913,649
TOTAL EXCHANGE-TRADED FUNDS (Cost $2,907,311)				2,913,649
TOTAL LONG-TERM INVESTMENTS (Cost $164,800,663)				197,788,877
SHORT-TERM INVESTMENTS — 0.6%
Investment of Cash Collateral from Securities Loaned — 0.0%
State Street Navigator Securities Lending Government Money Market Portfolio (c)		35,042		35,042
	Principal Amount
Repurchase Agreement — 0.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/28/24, 1.600%, due 7/01/24 (d)	$	1,078,840		1,078,840
TOTAL SHORT-TERM INVESTMENTS (Cost $1,113,882)				1,113,882
TOTAL INVESTMENTS — 100.5% (Cost $165,914,545) (e)				198,902,759
Other Assets/(Liabilities) — (0.5)%				(907,096)
NET ASSETS — 100.0%			$	197,995,663

Abbreviation Legend

ETF Exchange-Traded Fund

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Non-income producing security.

(b) Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2024, was $130,796 or 0.07% of net assets. The Fund received $97,597 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 $1,078,984. Collateralized by U.S. Government Agency obligations with a rate of 4.500%, maturity date of 3/31/26, and an aggregate market value, including accrued interest, of $1,100,475.

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

MassMutual Fundamental Value Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.6%
COMMON STOCK — 99.6%
Communication Services — 5.5%
Alphabet, Inc. Class A		44,615	$	8,126,622
Alphabet, Inc. Class C		14,178		2,600,529
Comcast Corp. Class A		106,808		4,182,601
Electronic Arts, Inc.		12,992		1,810,175
Omnicom Group, Inc.		24,112		2,162,846
T-Mobile US, Inc.		21,853		3,850,062
Take-Two Interactive Software, Inc. (a)		10,530		1,637,310
				24,370,145
Consumer Discretionary — 6.1%
Aptiv PLC (a)		18,534		1,305,164
Aramark		38,405		1,306,538
AutoNation, Inc. (a)		10,160		1,619,301
AutoZone, Inc. (a)		1,265		3,749,586
Booking Holdings, Inc.		497		1,968,866
Carnival Corp. (a)		119,552		2,238,013
Las Vegas Sands Corp.		39,446		1,745,486
Lennar Corp. Class A		14,784		2,215,678
Lithia Motors, Inc.		3,891		982,283
MGM Resorts International (a)		41,964		1,864,880
SharkNinja, Inc.		23,249		1,747,162
Six Flags Entertainment Corp. (a)		46,823		1,551,714
Starbucks Corp.		14,490		1,128,047
Ulta Beauty, Inc. (a)		3,702		1,428,491
United Parks & Resorts, Inc. (a)		25,832		1,402,936
Wynn Resorts Ltd.		13,004		1,163,858
				27,418,003
Consumer Staples — 8.3%
Coca-Cola Europacific Partners PLC		60,648		4,419,420
J. M. Smucker Co.		13,707		1,494,611
Kenvue, Inc.		98,958		1,799,057
Keurig Dr Pepper, Inc.		61,268		2,046,351
Kraft Heinz Co.		63,560		2,047,903
Molson Coors Beverage Co. Class B		32,461		1,649,993
Philip Morris International, Inc.		104,819		10,621,309
Procter & Gamble Co.		12,964		2,138,023
Target Corp.		13,532		2,003,277
Tyson Foods, Inc. Class A		26,440		1,510,782
US Foods Holding Corp (a)		60,030		3,180,389
Walmart, Inc.		61,546		4,167,280
				37,078,395

MassMutual Fundamental Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Energy — 10.0%
BP PLC Sponsored ADR		32,083	$	1,158,196
Canadian Natural Resources Ltd.		56,681		2,017,844
Cenovus Energy, Inc. (b)		185,841		3,653,634
ConocoPhillips		25,635		2,932,132
Diamondback Energy, Inc.		15,879		3,178,817
Enbridge, Inc.		135,824		4,833,976
Exxon Mobil Corp.		20,151		2,319,783
Halliburton Co.		45,258		1,528,815
Hess Corp.		33,571		4,952,394
Marathon Petroleum Corp.		18,186		3,154,907
Nov, Inc.		43,008		817,582
Phillips 66		50,599		7,143,061
Plains GP Holdings LP Class A		205,566		3,868,752
Schlumberger NV		65,427		3,086,846
				44,646,739
Financials — 20.2%
Allstate Corp.		24,218		3,866,646
American Express Co.		21,253		4,921,132
American International Group, Inc.		26,940		2,000,026
Aon PLC Class A		4,958		1,455,570
Arthur J Gallagher & Co.		6,312		1,636,765
Axis Capital Holdings Ltd.		19,863		1,403,321
Bank of America Corp.		47,473		1,888,001
The Bank of Nova Scotia (b)		21,755		994,639
Berkshire Hathaway, Inc. Class B (a)		23,605		9,602,514
Blue Owl Capital, Inc.		64,155		1,138,751
Charles Schwab Corp.		27,179		2,002,820
Chubb Ltd.		26,278		6,702,992
Corpay, Inc. (a)		7,747		2,063,878
Fidelity National Information Services, Inc.		127,507		9,608,927
Goldman Sachs Group, Inc.		5,891		2,664,617
Huntington Bancshares, Inc.		212,484		2,800,539
Intercontinental Exchange, Inc.		13,710		1,876,762
JP Morgan Chase & Co.		66,683		13,487,303
LPL Financial Holdings, Inc.		4,916		1,373,039
M&T Bank Corp.		9,080		1,374,349
Morgan Stanley		51,546		5,009,756
Northern Trust Corp.		18,450		1,549,431
Wells Fargo & Co.		146,717		8,713,523
Willis Towers Watson PLC		7,414		1,943,506
				90,078,807
Health Care — 13.8%
Abbott Laboratories		27,125		2,818,559
AbbVie, Inc.		17,688		3,033,846
Amgen, Inc.		10,470		3,271,351
Avantor, Inc. (a)		137,040		2,905,248
Cencora, Inc.		16,965		3,822,214
Centene Corp. (a)		32,615		2,162,375
Cigna Group		8,143		2,691,832
CVS Health Corp.		51,977		3,069,762
Elevance Health, Inc.		3,210		1,739,371
Humana, Inc.		9,110		3,403,951
ICON PLC (a)		9,430		2,956,022

MassMutual Fundamental Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
McKesson Corp.		5,086	$	2,970,427
Medtronic PLC		54,271		4,271,670
Merck & Co., Inc.		49,891		6,176,506
Sanofi SA ADR		98,398		4,774,271
Smith & Nephew PLC Sponsored ADR (b)		143,722		3,561,431
UnitedHealth Group, Inc.		15,289		7,786,076
				61,414,912
Industrials — 12.5%
AECOM		18,320		1,614,725
AerCap Holdings NV		24,180		2,253,576
Allegion PLC		9,070		1,071,621
Builders FirstSource, Inc. (a)		11,593		1,604,587
BWX Technologies, Inc.		25,619		2,433,805
CACI International, Inc. Class A (a)		4,338		1,865,904
Deere & Co.		2,838		1,060,362
Fortive Corp.		26,621		1,972,616
General Dynamics Corp.		22,779		6,609,099
Honeywell International, Inc.		13,763		2,938,951
Howmet Aerospace, Inc.		18,085		1,403,939
Jacobs Solutions, Inc.		30,731		4,293,428
JB Hunt Transport Services, Inc.		7,325		1,172,000
Johnson Controls International PLC		49,002		3,257,163
L3Harris Technologies, Inc.		7,260		1,630,451
Leidos Holdings, Inc.		18,282		2,666,978
Masco Corp.		21,630		1,442,072
MDU Resources Group, Inc.		79,675		1,999,842
Norfolk Southern Corp.		11,510		2,471,082
Stanley Black & Decker, Inc.		11,012		879,749
U-Haul Holding Co. (UHAL/B US)		19,663		1,180,173
United Rentals, Inc.		4,108		2,656,767
Vertiv Holdings Co. Class A		30,925		2,677,177
WESCO International, Inc.		5,970		946,364
Westinghouse Air Brake Technologies Corp.		14,342		2,266,753
WillScot Mobile Mini Holdings Corp. (a)		33,574		1,263,725
				55,632,909
Information Technology — 10.9%
Advanced Micro Devices, Inc. (a)		18,209		2,953,682
Applied Materials, Inc.		14,715		3,472,593
Broadcom, Inc.		1,538		2,469,305
Ciena Corp. (a)		26,370		1,270,507
Cognizant Technology Solutions Corp. Class A		40,341		2,743,188
Dell Technologies, Inc. Class C		17,195		2,371,362
Flex Ltd. (a)		77,631		2,289,338
Hewlett Packard Enterprise Co.		65,200		1,380,284
Keysight Technologies, Inc. (a)		8,975		1,227,331
Lam Research Corp.		1,081		1,151,103
Littelfuse, Inc.		2,378		607,793
Microchip Technology, Inc.		50,540		4,624,410
Micron Technology, Inc.		24,996		3,287,724
Nice Ltd. Sponsored ADR (a) (b)		6,917		1,189,516
NXP Semiconductors NV		5,970		1,606,467
Oracle Corp.		76,133		10,749,980
QUALCOMM, Inc.		20,181		4,019,652

MassMutual Fundamental Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Skyworks Solutions, Inc.		10,133	$	1,079,975
				48,494,210
Materials — 5.4%
Air Products & Chemicals, Inc.		21,162		5,460,854
Axalta Coating Systems Ltd. (a)		58,419		1,996,177
CRH PLC		75,951		5,694,806
DuPont de Nemours, Inc.		41,714		3,357,560
Element Solutions, Inc.		71,075		1,927,554
International Flavors & Fragrances, Inc.		15,987		1,522,122
Kinross Gold Corp.		84,205		700,586
Knife River Corp. (a)		26,542		1,861,656
Olin Corp.		6,110		288,086
Teck Resources Ltd. Class B		32,093		1,537,255
				24,346,656
Real Estate — 3.7%
COPT Defense Properties		41,842		1,047,305
CubeSmart		28,638		1,293,578
Extra Space Storage, Inc.		9,641		1,498,308
Mid-America Apartment Communities, Inc.		26,250		3,743,513
Prologis, Inc.		20,428		2,294,269
Public Storage		15,260		4,389,539
SBA Communications Corp.		2,891		567,503
VICI Properties, Inc.		62,151		1,780,005
				16,614,020
Utilities — 3.2%
CenterPoint Energy, Inc.		106,766		3,307,611
Entergy Corp.		47,996		5,135,572
FirstEnergy Corp.		41,819		1,600,413
Pinnacle West Capital Corp.		53,713		4,102,599
				14,146,195
TOTAL COMMON STOCK (Cost $348,037,684)				444,240,991
TOTAL EQUITIES (Cost $348,037,684)				444,240,991
TOTAL LONG-TERM INVESTMENTS (Cost $348,037,684)				444,240,991
SHORT-TERM INVESTMENTS — 1.8%
Investment of Cash Collateral from Securities Loaned — 1.3%
State Street Navigator Securities Lending Government Money Market Portfolio (c)		5,652,064		5,652,064
	Principal Amount
Repurchase Agreement — 0.5%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/28/24, 1.600%, due 7/01/24 (d)	$	2,139,510		2,139,510

MassMutual Fundamental Value Fund —  Portfolio of Investments (Continued)

	Value
TOTAL SHORT-TERM INVESTMENTS (Cost $7,791,574)	$	7,791,574
TOTAL INVESTMENTS — 101.4% (Cost $355,829,258) (e)		452,032,565
Other Assets/(Liabilities) — (1.4)%		(6,271,713)
NET ASSETS — 100.0%	$	445,760,852

Abbreviation Legend

ADR American Depositary Receipt

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Non-income producing security.

(b) Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2024, was $8,118,064 or 1.82% of net assets. The Fund received $2,723,267 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

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

(d) Maturity value of $2,139,795. Collateralized by U.S. Government Agency obligations with a rate of 4.500%, maturity date of 3/31/26, and an aggregate market value, including accrued interest, of $2,182,473.

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

MM S&P 500 Index Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.9%
COMMON STOCK — 99.9%
Communication Services — 9.3%
Alphabet, Inc. Class A		294,157	$	53,580,698
Alphabet, Inc. Class C		244,820		44,904,884
AT&T, Inc.		359,065		6,861,732
Charter Communications, Inc. Class A (a)		4,894		1,463,110
Comcast Corp. Class A		195,952		7,673,480
Electronic Arts, Inc.		12,298		1,713,480
Fox Corp. Class A		11,096		381,369
Fox Corp. Class B		7,091		227,054
Interpublic Group of Cos., Inc.		19,189		558,208
Live Nation Entertainment, Inc. (a)		7,109		666,398
Match Group, Inc. (a)		13,126		398,768
Meta Platforms, Inc. Class A		109,762		55,344,196
Netflix, Inc. (a)		21,579		14,563,235
News Corp. Class A		19,040		524,933
News Corp. Class B		5,745		163,101
Omnicom Group, Inc.		9,920		889,824
Paramount Global Class B		25,733		267,366
T-Mobile US, Inc.		25,803		4,545,972
Take-Two Interactive Software, Inc. (a)		8,041		1,250,295
Verizon Communications, Inc.		211,017		8,702,341
Walt Disney Co.		91,275		9,062,695
Warner Bros Discovery, Inc. (a)		111,181		827,187
				214,570,326
Consumer Discretionary — 9.9%
Airbnb, Inc. Class A (a)		22,098		3,350,720
Amazon.com, Inc. (a)		458,663		88,636,625
Aptiv PLC (a)		13,589		956,937
AutoZone, Inc. (a)		866		2,566,911
Bath & Body Works, Inc.		11,320		442,046
Best Buy Co., Inc.		9,767		823,260
Booking Holdings, Inc.		1,700		6,734,550
BorgWarner, Inc.		11,058		356,510
Caesars Entertainment, Inc. (a)		10,808		429,510
CarMax, Inc. (a)		7,702		564,865
Carnival Corp. (a)		50,478		944,948
Chipotle Mexican Grill, Inc. (a)		68,700		4,304,055
Darden Restaurants, Inc.		5,884		890,367
Deckers Outdoor Corp. (a)		1,271		1,230,264
Domino's Pizza, Inc.		1,720		888,088
DR Horton, Inc.		14,854		2,093,374
eBay, Inc.		25,290		1,358,579
Etsy, Inc. (a)		5,740		338,545
Expedia Group, Inc. (a)		6,348		799,785
Ford Motor Co.		196,810		2,467,997
Garmin Ltd.		7,762		1,264,585

MM S&P 500 Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
General Motors Co.		57,161	$	2,655,700
Genuine Parts Co.		7,024		971,560
Hasbro, Inc.		6,782		396,747
Hilton Worldwide Holdings, Inc.		12,542		2,736,664
Home Depot, Inc.		49,620		17,081,189
Las Vegas Sands Corp.		18,162		803,669
Lennar Corp. Class A		12,239		1,834,259
LKQ Corp.		13,407		557,597
Lowe's Cos., Inc.		28,631		6,311,990
Lululemon Athletica, Inc. (a)		5,753		1,718,421
Marriott International, Inc. Class A		12,031		2,908,735
McDonald's Corp.		36,149		9,212,211
MGM Resorts International (a)		12,603		560,077
Mohawk Industries, Inc. (a)		2,783		316,121
NIKE, Inc. Class B		60,647		4,570,964
Norwegian Cruise Line Holdings Ltd. (a)		21,315		400,509
NVR, Inc. (a)		157		1,191,404
O'Reilly Automotive, Inc. (a)		2,944		3,109,041
Pool Corp.		1,938		595,606
PulteGroup, Inc.		10,627		1,170,033
Ralph Lauren Corp.		1,874		328,062
Ross Stores, Inc.		16,868		2,451,258
Royal Caribbean Cruises Ltd. (a)		11,919		1,900,246
Starbucks Corp.		56,539		4,401,561
Tapestry, Inc.		11,858		507,404
Tesla, Inc. (a)		138,960		27,497,405
TJX Cos., Inc.		56,603		6,231,990
Tractor Supply Co.		5,360		1,447,200
Ulta Beauty, Inc. (a)		2,433		938,822
Wynn Resorts Ltd.		4,606		412,237
Yum! Brands, Inc.		14,079		1,864,904
				228,526,107
Consumer Staples — 5.8%
Altria Group, Inc.		86,210		3,926,866
Archer-Daniels-Midland Co.		24,751		1,496,198
Brown-Forman Corp. Class B		9,059		391,258
Bunge Global SA		7,090		756,999
Campbell Soup Co.		9,523		430,344
Church & Dwight Co., Inc.		12,193		1,264,170
Clorox Co.		6,326		863,309
Coca-Cola Co.		194,321		12,368,532
Colgate-Palmolive Co.		41,098		3,988,150
Conagra Brands, Inc.		23,426		665,767
Constellation Brands, Inc. Class A		8,116		2,088,085
Costco Wholesale Corp.		22,232		18,896,978
Dollar General Corp.		11,115		1,469,736
Dollar Tree, Inc. (a)		10,510		1,122,153
Estee Lauder Cos., Inc. Class A		11,805		1,256,052
General Mills, Inc.		28,211		1,784,628
Hershey Co.		7,380		1,356,665
Hormel Foods Corp.		14,027		427,683
J. M. Smucker Co.		5,452		594,486
Kellanova		13,214		762,184
Kenvue, Inc.		95,118		1,729,245
Keurig Dr Pepper, Inc.		52,616		1,757,374
Kimberly-Clark Corp.		16,773		2,318,029
Kraft Heinz Co.		39,944		1,286,996

MM S&P 500 Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Kroger Co.		33,465	$	1,670,907
Lamb Weston Holdings, Inc.		7,056		593,269
McCormick & Co., Inc.		12,817		909,238
Molson Coors Beverage Co. Class B		9,277		471,550
Mondelez International, Inc. Class A		67,131		4,393,053
Monster Beverage Corp. (a)		35,574		1,776,921
PepsiCo, Inc.		68,772		11,342,566
Philip Morris International, Inc.		77,781		7,881,549
Procter & Gamble Co.		118,261		19,503,604
Sysco Corp.		25,148		1,795,316
Target Corp.		23,130		3,424,165
Tyson Foods, Inc. Class A		14,074		804,188
Walgreens Boots Alliance, Inc.		34,931		422,490
Walmart, Inc.		213,870		14,481,138
				132,471,841
Energy — 3.6%
APA Corp.		17,560		516,966
Baker Hughes Co.		50,146		1,763,635
Chevron Corp.		85,831		13,425,685
ConocoPhillips		58,624		6,705,413
Coterra Energy, Inc.		37,124		990,097
Devon Energy Corp.		31,648		1,500,115
Diamondback Energy, Inc.		8,968		1,795,304
EOG Resources, Inc.		28,830		3,628,832
EQT Corp.		22,065		815,964
Exxon Mobil Corp.		224,701		25,867,579
Halliburton Co.		44,141		1,491,083
Hess Corp.		13,791		2,034,448
Kinder Morgan, Inc.		96,888		1,925,165
Marathon Oil Corp.		28,231		809,383
Marathon Petroleum Corp.		17,644		3,060,881
Occidental Petroleum Corp.		33,318		2,100,033
ONEOK, Inc.		29,187		2,380,200
Phillips 66		21,227		2,996,616
Schlumberger NV		71,515		3,374,078
Targa Resources Corp.		11,172		1,438,730
Valero Energy Corp.		16,376		2,567,102
Williams Cos., Inc.		61,308		2,605,590
				83,792,899
Financials — 12.4%
Aflac, Inc.		25,813		2,305,359
Allstate Corp.		13,152		2,099,848
American Express Co.		28,460		6,589,913
American International Group, Inc.		33,194		2,464,323
Ameriprise Financial, Inc.		4,974		2,124,843
Aon PLC Class A		10,889		3,196,793
Arch Capital Group Ltd. (a)		18,588		1,875,343
Arthur J Gallagher & Co.		10,932		2,834,777
Assurant, Inc.		2,691		447,379
Bank of America Corp.		341,181		13,568,768
Bank of New York Mellon Corp.		37,429		2,241,623
Berkshire Hathaway, Inc. Class B (a)		90,712		36,901,642
BlackRock, Inc.		7,006		5,515,964
Blackstone, Inc.		35,771		4,428,450
Brown & Brown, Inc.		11,997		1,072,652

MM S&P 500 Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Capital One Financial Corp.		19,059	$	2,638,718
Cboe Global Markets, Inc.		5,289		899,447
Charles Schwab Corp.		74,768		5,509,654
Chubb Ltd.		20,305		5,179,399
Cincinnati Financial Corp.		7,866		928,975
Citigroup, Inc.		95,603		6,066,966
Citizens Financial Group, Inc.		22,798		821,412
CME Group, Inc.		17,960		3,530,936
Corpay, Inc. (a)		3,500		932,435
Discover Financial Services		12,528		1,638,788
Everest Group Ltd.		2,214		843,578
FactSet Research Systems, Inc.		1,945		794,085
Fidelity National Information Services, Inc.		27,760		2,091,994
Fifth Third Bancorp		34,126		1,245,258
Fiserv, Inc. (a)		29,230		4,356,439
Franklin Resources, Inc.		14,368		321,125
Global Payments, Inc.		12,718		1,229,831
Globe Life, Inc.		4,291		353,063
Goldman Sachs Group, Inc.		16,165		7,311,753
Hartford Financial Services Group, Inc.		14,726		1,480,552
Huntington Bancshares, Inc.		71,360		940,525
Intercontinental Exchange, Inc.		28,799		3,942,295
Invesco Ltd.		23,536		352,099
Jack Henry & Associates, Inc.		3,743		621,413
JP Morgan Chase & Co.		143,886		29,102,382
KeyCorp.		46,924		666,790
KKR & Co., Inc.		33,339		3,508,596
Loews Corp.		8,932		667,578
M&T Bank Corp.		8,426		1,275,359
MarketAxess Holdings, Inc.		1,822		365,366
Marsh & McLennan Cos., Inc.		24,650		5,194,248
Mastercard, Inc. Class A		41,137		18,147,999
MetLife, Inc.		29,859		2,095,803
Moody's Corp.		7,849		3,303,880
Morgan Stanley		62,613		6,085,357
MSCI, Inc.		3,963		1,909,175
Nasdaq, Inc.		19,039		1,147,290
Northern Trust Corp.		10,277		863,062
PayPal Holdings, Inc. (a)		52,312		3,035,665
PNC Financial Services Group, Inc.		19,845		3,085,501
Principal Financial Group, Inc.		10,989		862,087
Progressive Corp.		29,325		6,091,096
Prudential Financial, Inc.		18,087		2,119,615
Raymond James Financial, Inc.		9,425		1,165,024
Regions Financial Corp.		45,504		911,900
S&P Global, Inc.		16,022		7,145,812
State Street Corp.		15,128		1,119,472
Synchrony Financial		20,040		945,688
T. Rowe Price Group, Inc.		11,218		1,293,548
Travelers Cos., Inc.		11,505		2,339,427
Truist Financial Corp.		66,823		2,596,074
US Bancorp		78,009		3,096,957
Visa, Inc. Class A		78,825		20,689,198
W. R. Berkley Corp.		10,154		797,901
Wells Fargo & Co.		174,725		10,376,918
Willis Towers Watson PLC		5,137		1,346,613
				285,049,798

MM S&P 500 Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Health Care — 11.7%
Abbott Laboratories		87,124	$	9,053,055
AbbVie, Inc.		88,369		15,157,051
Agilent Technologies, Inc.		14,571		1,888,839
Align Technology, Inc. (a)		3,569		861,664
Amgen, Inc.		26,892		8,402,405
Baxter International, Inc.		25,443		851,068
Becton Dickinson & Co.		14,539		3,397,910
Bio-Rad Laboratories, Inc. Class A (a)		1,049		286,492
Bio-Techne Corp.		8,077		578,717
Biogen, Inc. (a)		7,260		1,683,013
Boston Scientific Corp. (a)		73,596		5,667,628
Bristol-Myers Squibb Co.		101,435		4,212,596
Cardinal Health, Inc.		12,186		1,198,128
Catalent, Inc. (a)		9,327		524,457
Cencora, Inc.		8,232		1,854,670
Centene Corp. (a)		26,553		1,760,464
Charles River Laboratories International, Inc. (a)		2,641		545,578
Cigna Group		14,234		4,705,333
The Cooper Cos., Inc.		10,121		883,563
CVS Health Corp.		62,805		3,709,263
Danaher Corp.		33,007		8,246,799
DaVita, Inc. (a)		2,592		359,173
Dexcom, Inc. (a)		19,901		2,256,375
Edwards Lifesciences Corp. (a)		30,140		2,784,032
Elevance Health, Inc.		11,654		6,314,836
Eli Lilly & Co.		39,991		36,207,052
GE HealthCare Technologies, Inc. (a)		21,409		1,668,189
Gilead Sciences, Inc.		62,427		4,283,116
HCA Healthcare, Inc.		9,712		3,120,271
Henry Schein, Inc. (a)		6,510		417,291
Hologic, Inc. (a)		11,761		873,254
Humana, Inc.		6,030		2,253,110
IDEXX Laboratories, Inc. (a)		4,131		2,012,623
Incyte Corp. (a)		7,963		482,717
Insulet Corp. (a)		3,499		706,098
Intuitive Surgical, Inc. (a)		17,756		7,898,757
IQVIA Holdings, Inc. (a)		9,074		1,918,607
Johnson & Johnson		120,507		17,613,303
Labcorp Holdings, Inc.		4,254		865,732
McKesson Corp.		6,529		3,813,197
Medtronic PLC		66,618		5,243,503
Merck & Co., Inc.		126,843		15,703,163
Mettler-Toledo International, Inc. (a)		1,066		1,489,831
Moderna, Inc. (a)		16,733		1,987,044
Molina Healthcare, Inc. (a)		2,906		863,954
Pfizer, Inc.		283,707		7,938,122
Quest Diagnostics, Inc.		5,670		776,110
Regeneron Pharmaceuticals, Inc. (a)		5,323		5,594,633
ResMed, Inc.		7,298		1,396,983
Revvity, Inc.		6,043		633,669
Solventum Corp. (a)		6,642		351,229
STERIS PLC		5,020		1,102,091
Stryker Corp.		16,942		5,764,516
Teleflex, Inc.		2,428		510,681
Thermo Fisher Scientific, Inc.		19,108		10,566,724
UnitedHealth Group, Inc.		46,117		23,485,543
Universal Health Services, Inc. Class B		2,968		548,872

MM S&P 500 Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Vertex Pharmaceuticals, Inc. (a)		12,911	$	6,051,644
Viatris, Inc.		60,106		638,927
Waters Corp. (a)		2,962		859,335
West Pharmaceutical Services, Inc.		3,640		1,198,980
Zimmer Biomet Holdings, Inc.		10,178		1,104,618
Zoetis, Inc.		22,845		3,960,409
				269,087,007
Industrials — 8.1%
3M Co.		27,691		2,829,743
A.O. Smith Corp.		6,154		503,274
Allegion PLC		4,269		504,382
American Airlines Group, Inc. (a) (b)		31,450		356,329
AMETEK, Inc.		11,563		1,927,668
Automatic Data Processing, Inc.		20,474		4,886,939
Axon Enterprise, Inc. (a)		3,529		1,038,373
Boeing Co. (a)		28,863		5,253,355
Broadridge Financial Solutions, Inc.		5,976		1,177,272
Builders FirstSource, Inc. (a)		6,180		855,374
C.H. Robinson Worldwide, Inc.		6,019		530,394
Carrier Global Corp.		41,859		2,640,466
Caterpillar, Inc.		24,496		8,159,618
Cintas Corp.		4,317		3,023,022
Copart, Inc. (a)		43,780		2,371,125
CSX Corp.		97,452		3,259,769
Cummins, Inc.		6,828		1,890,878
Dayforce, Inc. (a) (b)		8,127		403,099
Deere & Co.		12,968		4,845,234
Delta Air Lines, Inc.		32,386		1,536,392
Dover Corp.		6,844		1,235,000
Eaton Corp. PLC		20,052		6,287,305
Emerson Electric Co.		28,643		3,155,313
Equifax, Inc.		6,240		1,512,950
Expeditors International of Washington, Inc.		6,994		872,781
Fastenal Co.		28,901		1,816,139
FedEx Corp.		11,324		3,395,388
Fortive Corp.		17,776		1,317,202
GE Vernova, Inc. (a)		13,729		2,354,661
Generac Holdings, Inc. (a)		2,970		392,693
General Dynamics Corp.		11,425		3,314,849
General Electric Co.		54,814		8,713,782
Honeywell International, Inc.		32,611		6,963,753
Howmet Aerospace, Inc.		19,598		1,521,393
Hubbell, Inc.		2,726		996,298
Huntington Ingalls Industries, Inc.		1,984		488,719
IDEX Corp.		3,863		777,236
Illinois Tool Works, Inc.		13,561		3,213,415
Ingersoll Rand, Inc.		20,098		1,825,702
Jacobs Solutions, Inc.		6,295		879,474
JB Hunt Transport Services, Inc.		4,182		669,120
Johnson Controls International PLC		33,698		2,239,906
L3Harris Technologies, Inc.		9,563		2,147,659
Leidos Holdings, Inc.		6,752		984,982
Lockheed Martin Corp.		10,704		4,999,838
Masco Corp.		11,011		734,103
Nordson Corp.		2,784		645,721
Norfolk Southern Corp.		11,385		2,444,246
Northrop Grumman Corp.		6,958		3,033,340

MM S&P 500 Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Old Dominion Freight Line, Inc.		8,966	$	1,583,396
Otis Worldwide Corp.		20,159		1,940,505
PACCAR, Inc.		26,207		2,697,749
Parker-Hannifin Corp.		6,464		3,269,556
Paychex, Inc.		16,165		1,916,522
Paycom Software, Inc.		2,513		359,460
Pentair PLC		8,282		634,981
Quanta Services, Inc.		7,279		1,849,521
Republic Services, Inc.		10,247		1,991,402
Rockwell Automation, Inc.		5,741		1,580,382
Rollins, Inc.		14,368		701,015
RTX Corp.		66,620		6,687,982
Snap-on, Inc.		2,588		676,477
Southwest Airlines Co.		30,422		870,373
Stanley Black & Decker, Inc.		7,859		627,856
Textron, Inc.		9,491		814,897
Trane Technologies PLC		11,331		3,727,106
TransDigm Group, Inc.		2,798		3,574,753
Uber Technologies, Inc. (a)		104,606		7,602,764
Union Pacific Corp.		30,551		6,912,469
United Airlines Holdings, Inc. (a)		16,434		799,678
United Parcel Service, Inc. Class B		36,472		4,991,193
United Rentals, Inc.		3,326		2,151,024
Veralto Corp.		10,987		1,048,929
Verisk Analytics, Inc.		7,159		1,929,708
W.W. Grainger, Inc.		2,185		1,971,394
Waste Management, Inc.		18,292		3,902,415
Westinghouse Air Brake Technologies Corp.		8,796		1,390,208
Xylem, Inc.		12,078		1,638,139
				186,767,528
Information Technology — 32.4%
Accenture PLC Class A		31,475		9,549,830
Adobe, Inc. (a)		22,426		12,458,540
Advanced Micro Devices, Inc. (a)		81,051		13,147,283
Akamai Technologies, Inc. (a)		7,727		696,048
Amphenol Corp. Class A		60,323		4,063,961
Analog Devices, Inc.		24,907		5,685,272
ANSYS, Inc. (a)		4,401		1,414,922
Apple, Inc.		722,021		152,072,063
Applied Materials, Inc.		41,618		9,821,432
Arista Networks, Inc. (a)		12,712		4,455,302
Autodesk, Inc. (a)		10,779		2,667,264
Broadcom, Inc.		21,819		35,031,059
Cadence Design Systems, Inc. (a)		13,677		4,209,097
CDW Corp.		6,712		1,502,414
Cisco Systems, Inc.		202,740		9,632,177
Cognizant Technology Solutions Corp. Class A		24,951		1,696,668
Corning, Inc.		38,844		1,509,089
Crowdstrike Holdings, Inc. Class A (a)		11,544		4,423,545
Enphase Energy, Inc. (a)		6,802		678,227
EPAM Systems, Inc. (a)		2,979		560,380
F5, Inc. (a)		2,946		507,390
Fair Isaac Corp. (a)		1,234		1,837,006
First Solar, Inc. (a)		5,353		1,206,887
Fortinet, Inc. (a)		31,679		1,909,293
Gartner, Inc. (a)		3,871		1,738,311
Gen Digital, Inc.		27,444		685,551

MM S&P 500 Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
GoDaddy, Inc. Class A (a)		7,062	$	986,632
Hewlett Packard Enterprise Co.		64,446		1,364,322
HP, Inc.		43,249		1,514,580
Intel Corp.		213,161		6,601,596
International Business Machines Corp.		45,996		7,955,008
Intuit, Inc.		14,000		9,200,940
Jabil, Inc.		6,031		656,112
Juniper Networks, Inc.		16,550		603,413
Keysight Technologies, Inc. (a)		8,641		1,181,657
KLA Corp.		6,747		5,562,969
Lam Research Corp.		6,547		6,971,573
Microchip Technology, Inc.		27,236		2,492,094
Micron Technology, Inc.		55,444		7,292,549
Microsoft Corp.		372,280		166,390,546
Monolithic Power Systems, Inc.		2,435		2,000,791
Motorola Solutions, Inc.		8,315		3,210,006
NetApp, Inc.		10,323		1,329,602
NVIDIA Corp.		1,232,072		152,210,175
NXP Semiconductors NV		12,798		3,443,814
ON Semiconductor Corp. (a)		21,622		1,482,188
Oracle Corp.		79,777		11,264,512
Palo Alto Networks, Inc. (a)		16,172		5,482,470
PTC, Inc. (a)		6,077		1,104,009
Qorvo, Inc. (a)		4,706		546,084
QUALCOMM, Inc.		55,993		11,152,686
Roper Technologies, Inc.		5,352		3,016,708
Salesforce, Inc.		48,615		12,498,916
Seagate Technology Holdings PLC		9,904		1,022,786
ServiceNow, Inc. (a)		10,250		8,063,368
Skyworks Solutions, Inc.		7,887		840,596
Super Micro Computer, Inc. (a)		2,507		2,054,110
Synopsys, Inc. (a)		7,618		4,533,167
TE Connectivity Ltd.		15,288		2,299,774
Teledyne Technologies, Inc. (a)		2,403		932,316
Teradyne, Inc.		7,795		1,155,921
Texas Instruments, Inc.		45,557		8,862,203
Trimble, Inc. (a)		12,464		696,987
Tyler Technologies, Inc. (a)		2,110		1,060,866
VeriSign, Inc. (a)		4,332		770,230
Western Digital Corp. (a)		16,245		1,230,884
Zebra Technologies Corp. Class A (a)		2,624		810,632
				745,008,803
Materials — 2.2%
Air Products & Chemicals, Inc.		11,083		2,859,968
Albemarle Corp. (b)		5,729		547,234
Amcor PLC		70,910		693,500
Avery Dennison Corp.		3,969		867,822
Ball Corp.		15,556		933,671
Celanese Corp.		5,018		676,878
CF Industries Holdings, Inc.		9,142		677,605
Corteva, Inc.		35,161		1,896,584
Dow, Inc.		35,186		1,866,617
DuPont de Nemours, Inc.		20,917		1,683,609
Eastman Chemical Co.		6,029		590,661
Ecolab, Inc.		12,715		3,026,170
FMC Corp.		6,521		375,284
Freeport-McMoRan, Inc.		71,845		3,491,667

MM S&P 500 Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
International Flavors & Fragrances, Inc.		12,634	$	1,202,883
International Paper Co.		17,660		762,029
Linde PLC (LIN US)		24,086		10,569,178
LyondellBasell Industries NV Class A		12,824		1,226,744
Martin Marietta Materials, Inc.		3,070		1,663,326
Mosaic Co.		16,375		473,238
Newmont Corp. (NEM US)		58,101		2,432,689
Nucor Corp.		11,972		1,892,534
Packaging Corp. of America		4,457		813,670
PPG Industries, Inc.		11,814		1,487,264
Sherwin-Williams Co.		11,697		3,490,736
Steel Dynamics, Inc.		7,374		954,933
Vulcan Materials Co.		6,657		1,655,463
Westrock Co.		12,875		647,097
				49,459,054
Real Estate — 2.2%
Alexandria Real Estate Equities, Inc.		7,760		907,687
American Tower Corp.		23,356		4,539,939
AvalonBay Communities, Inc.		7,192		1,487,953
Boston Properties, Inc.		7,476		460,222
Camden Property Trust		5,212		568,681
CBRE Group, Inc. Class A (a)		15,182		1,352,868
CoStar Group, Inc. (a)		20,666		1,532,177
Crown Castle, Inc.		21,729		2,122,923
Digital Realty Trust, Inc.		16,179		2,460,017
Equinix, Inc.		4,761		3,602,173
Equity Residential		17,293		1,199,097
Essex Property Trust, Inc.		3,164		861,241
Extra Space Storage, Inc.		10,585		1,645,015
Federal Realty Investment Trust		3,837		387,422
Healthpeak Properties, Inc.		35,468		695,173
Host Hotels & Resorts, Inc.		34,508		620,454
Invitation Homes, Inc.		28,401		1,019,312
Iron Mountain, Inc.		14,629		1,311,051
Kimco Realty Corp.		34,173		665,007
Mid-America Apartment Communities, Inc.		5,742		818,867
Prologis, Inc.		46,429		5,214,441
Public Storage		7,878		2,266,107
Realty Income Corp.		43,904		2,319,009
Regency Centers Corp.		7,986		496,729
SBA Communications Corp.		5,405		1,061,001
Simon Property Group, Inc.		16,227		2,463,259
UDR, Inc.		15,531		639,101
Ventas, Inc.		20,458		1,048,677
VICI Properties, Inc.		51,832		1,484,468
Welltower, Inc.		30,017		3,129,272
Weyerhaeuser Co.		36,042		1,023,232
				49,402,575
Utilities — 2.3%
AES Corp.		35,760		628,303
Alliant Energy Corp.		13,167		670,200
Ameren Corp.		13,174		936,803
American Electric Power Co., Inc.		26,347		2,311,686
American Water Works Co., Inc.		9,640		1,245,102
Atmos Energy Corp.		7,429		866,593

MM S&P 500 Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
CenterPoint Energy, Inc.		32,563	$	1,008,802
CMS Energy Corp.		14,752		878,187
Consolidated Edison, Inc.		17,296		1,546,608
Constellation Energy Corp.		15,798		3,163,865
Dominion Energy, Inc.		42,229		2,069,221
DTE Energy Co.		10,344		1,148,287
Duke Energy Corp.		38,629		3,871,785
Edison International		19,218		1,380,045
Entergy Corp.		10,595		1,133,665
Evergy, Inc.		11,225		594,588
Eversource Energy		17,787		1,008,701
Exelon Corp.		49,873		1,726,105
FirstEnergy Corp.		26,366		1,009,027
NextEra Energy, Inc.		103,008		7,293,996
NiSource, Inc.		23,030		663,494
NRG Energy, Inc.		10,515		818,698
PG&E Corp.		107,945		1,884,720
Pinnacle West Capital Corp.		5,882		449,267
PPL Corp.		36,396		1,006,349
Public Service Enterprise Group, Inc.		24,762		1,824,959
Sempra		31,531		2,398,248
Southern Co.		54,973		4,264,256
Vistra Corp.		16,391		1,409,298
WEC Energy Group, Inc.		15,612		1,224,918
Xcel Energy, Inc.		27,934		1,491,955
				51,927,731
TOTAL COMMON STOCK (Cost $1,109,839,668)				2,296,063,669
TOTAL EQUITIES (Cost $1,109,839,668)				2,296,063,669
TOTAL LONG-TERM INVESTMENTS (Cost $1,109,839,668)				2,296,063,669
	Principal Amount
SHORT-TERM INVESTMENTS — 0.3%
Repurchase Agreement — 0.3%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/28/24, 1.600%, due 7/01/24 (c)	$	7,223,202		7,223,202
U.S. Treasury Bill — 0.0%
U.S. Treasury Bills
5.326% 10/03/24 (d) (e)		20,000		19,730
5.332% 10/03/24 (d) (e)		30,000		29,595
5.339% 10/03/24 (d) (e)		25,000		24,662
5.346% 10/03/24 (d) (e)		25,000		24,662
5.347% 10/03/24 (d) (e)		15,000		14,797
5.348% 10/03/24 (d) (e)		10,000		9,865
5.350% 10/03/24 (d) (e)		40,000		39,459
5.350% 10/03/24 (d) (e)		150,000		147,973
5.352% 10/03/24 (d) (e)		390,000		384,730
5.353% 10/03/24 (d) (e)		65,000		64,122
5.354% 10/03/24 (d) (e)		170,000		167,703
5.357% 10/03/24 (d) (e)		25,000		24,662

MM S&P 500 Index Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
5.359% 10/03/24 (d) (e)	$	5,000	$	4,932
5.368% 10/03/24 (d) (e)		10,000		9,865
5.369% 10/03/24 (d) (e)		135,000		133,176
				1,099,933
TOTAL SHORT-TERM INVESTMENTS (Cost $8,322,850)				8,323,135
TOTAL INVESTMENTS — 100.2% (Cost $1,118,162,518) (f)				2,304,386,804
Other Assets/(Liabilities) — (0.2)%				(4,889,535)
NET ASSETS — 100.0%			$	2,299,497,269

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 June 30, 2024, was $1,293,485 or 0.06% of net assets. The Fund received $1,365,130 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

(c) Maturity value of $7,224,165. Collateralized by U.S. Government Agency obligations with a rate of 4.500%, maturity date of 3/31/26, and an aggregate market value, including accrued interest, of $7,367,770.

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

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

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

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/Net Unrealized Appreciation (Depreciation)
Long
S&P 500 E Mini Index	9/20/24		33	$	9,150,652	$	(40,177)

MassMutual Equity Opportunities Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 97.1%
COMMON STOCK — 96.7%
Communication Services — 1.5%
News Corp. Class A		210,400	$	5,800,728
News Corp. Class B		49,700		1,410,983
Walt Disney Co.		26,400		2,621,256
				9,832,967
Consumer Discretionary — 9.6%
Las Vegas Sands Corp.		68,500		3,031,125
McDonald's Corp.		76,819		19,576,554
NIKE, Inc. Class B		190,726		14,375,018
TJX Cos., Inc.		220,528		24,280,133
				61,262,830
Consumer Staples — 9.5%
Coca-Cola Co.		177,331		11,287,118
Kenvue, Inc.		268,600		4,883,148
Kimberly-Clark Corp.		38,600		5,334,520
PepsiCo, Inc.		98,607		16,263,253
Philip Morris International, Inc.		50,800		5,147,564
Procter & Gamble Co.		107,083		17,660,128
				60,575,731
Energy — 2.6%
ConocoPhillips		55,900		6,393,842
TotalEnergies SE (a)		120,500		8,031,214
TotalEnergies SE Sponsored ADR (a)		32,600		2,173,768
				16,598,824
Financials — 21.4%
American Express Co.		87,895		20,352,087
American International Group, Inc.		71,600		5,315,584
Charles Schwab Corp.		63,500		4,679,315
Chubb Ltd.		96,683		24,661,900
Fifth Third Bancorp		175,200		6,393,048
Marsh & McLennan Cos., Inc.		92,070		19,400,990
Mastercard, Inc. Class A		19,476		8,592,032
MetLife, Inc.		78,400		5,502,896
S&P Global, Inc.		20,733		9,246,918
US Bancorp		97,100		3,854,870
Visa, Inc. Class A		75,363		19,780,527
Wells Fargo & Co.		153,100		9,092,609
				136,872,776

MassMutual Equity Opportunities Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Health Care — 14.5%
AbbVie, Inc.		10,800	$	1,852,416
Becton Dickinson & Co.		23,700		5,538,927
Danaher Corp.		84,303		21,063,105
Elevance Health, Inc.		20,020		10,848,037
Johnson & Johnson		20,000		2,923,200
Sanofi SA ADR		59,900		2,906,348
Stryker Corp.		51,327		17,464,012
UnitedHealth Group, Inc.		45,909		23,379,617
Viatris, Inc.		198,200		2,106,866
Zimmer Biomet Holdings, Inc.		45,100		4,894,703
				92,977,231
Industrials — 12.1%
Boeing Co. (b)		19,800		3,603,798
GE Vernova, Inc. (b)		11,800		2,023,818
General Dynamics Corp.		26,348		7,644,609
General Electric Co.		37,300		5,929,581
Honeywell International, Inc.		86,391		18,447,934
L3Harris Technologies, Inc.		28,300		6,355,614
Lockheed Martin Corp.		16,502		7,708,084
Norfolk Southern Corp.		10,700		2,297,183
Northrop Grumman Corp.		16,225		7,073,289
Stanley Black & Decker, Inc.		56,400		4,505,796
Union Pacific Corp.		36,048		8,156,220
United Parcel Service, Inc. Class B		26,400		3,612,840
				77,358,766
Information Technology — 16.2%
Accenture PLC Class A		69,157		20,982,925
Apple, Inc.		92,685		19,521,315
Microsoft Corp.		64,271		28,725,923
QUALCOMM, Inc.		48,400		9,640,312
Samsung Electronics Co. Ltd.		58,200		3,420,169
Texas Instruments, Inc.		112,299		21,845,525
				104,136,169
Materials — 4.7%
CF Industries Holdings, Inc.		67,300		4,988,276
International Paper Co.		94,000		4,056,100
Linde PLC (LIN US)		48,577		21,316,073
				30,360,449
Real Estate — 2.7%
American Tower Corp.		48,417		9,411,297
Equity Residential		67,200		4,659,648
Weyerhaeuser Co.		120,800		3,429,512
				17,500,457
Utilities — 1.9%
Ameren Corp.		59,000		4,195,490

MassMutual Equity Opportunities Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Southern Co.		99,800	$	7,741,486
				11,936,976
TOTAL COMMON STOCK (Cost $490,575,670)				619,413,176
PREFERRED STOCK — 0.4%
Consumer Discretionary — 0.4%
Dr Ing hc F Porsche AG 3.323% (c)		18,600		1,382,832
Volkswagen AG 8.604%		11,600		1,308,809
				2,691,641
TOTAL PREFERRED STOCK (Cost $3,785,215)				2,691,641
TOTAL EQUITIES (Cost $494,360,885)				622,104,817
TOTAL LONG-TERM INVESTMENTS (Cost $494,360,885)				622,104,817
SHORT-TERM INVESTMENTS — 4.6%
Investment of Cash Collateral from Securities Loaned — 1.3%
State Street Navigator Securities Lending Government Money Market Portfolio (d)		8,284,014		8,284,014
Mutual Fund — 0.0%
T. Rowe Price Government Reserve Investment Fund		171		171
	Principal Amount
Repurchase Agreement — 3.3%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/28/24, 1.600%, due 7/01/24 (e)	$	21,061,195		21,061,195
TOTAL SHORT-TERM INVESTMENTS (Cost $29,345,380)				29,345,380
TOTAL INVESTMENTS — 101.7% (Cost $523,706,265) (f)				651,450,197
Other Assets/(Liabilities) — (1.7)%				(10,711,303)
NET ASSETS — 100.0%			$	640,738,894

Abbreviation Legend

ADR American Depositary Receipt

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2024, was $9,606,330 or 1.50% of net assets. The Fund received $1,774,818 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

(b) Non-income producing security.

(c) Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At June 30, 2024, the aggregate market value of these securities amounted to $1,382,832 or 0.22% of net assets.

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

(e) Maturity value of $21,064,003. Collateralized by U.S. Government Agency obligations with a rate of 4.500%, maturity date of 3/31/26, and an aggregate market value, including accrued interest, of $21,482,443.

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

MassMutual Blue Chip Growth Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 97.9%
COMMON STOCK — 97.7%
Communication Services — 18.6%
Alphabet, Inc. Class A		545,624	$	99,385,412
Alphabet, Inc. Class C		547,191		100,365,773
Meta Platforms, Inc. Class A		306,870		154,729,991
Netflix, Inc. (a)		125,510		84,704,189
Sea Ltd. ADR (a)		52,893		3,777,618
T-Mobile US, Inc.		75,305		13,267,235
Walt Disney Co.		310,551		30,834,609
				487,064,827
Consumer Discretionary — 14.5%
Alibaba Group Holding Ltd. Sponsored ADR		101,208		7,286,976
Amazon.com, Inc. (a)		991,733		191,652,402
Booking Holdings, Inc.		3,172		12,565,878
Carvana Co. (a)		110,744		14,254,968
Chipotle Mexican Grill, Inc. (a)		247,350		15,496,478
DoorDash, Inc., Class A (a)		37,545		4,084,145
Lululemon Athletica, Inc. (a)		9,116		2,722,949
NIKE, Inc. Class B		28,918		2,179,550
Ross Stores, Inc.		50,154		7,288,379
Starbucks Corp.		206,078		16,043,172
Tesla, Inc. (a)		440,822		87,229,857
TJX Cos., Inc.		58,022		6,388,222
Yum China Holdings, Inc.		98,947		3,051,526
Yum! Brands, Inc.		84,564		11,201,347
				381,445,849
Consumer Staples — 1.8%
Colgate-Palmolive Co.		62,454		6,060,536
Dollar General Corp.		56,023		7,407,921
Mondelez International, Inc. Class A		45,816		2,998,199
Monster Beverage Corp. (a)		509,388		25,443,931
Procter & Gamble Co.		28,041		4,624,522
				46,535,109
Energy — 0.2%
Schlumberger NV		88,150		4,158,917
Financials — 8.4%
Adyen NV ADR (a) (b)		216,565		2,570,626
Ant Group Balance Owed 2023 (Acquired 8/14/23, Cost $1,214,643) (a) (c) (d) (e)		1,214,643		1,225,089
Block, Inc. (a)		155,350		10,018,521
Charles Schwab Corp.		69,874		5,149,015
Chubb Ltd.		57,050		14,552,314
FactSet Research Systems, Inc.		32,196		13,144,661

MassMutual Blue Chip Growth Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Fiserv, Inc. (a)		19,379	$	2,888,246
Goldman Sachs Group, Inc.		12,787		5,783,816
Marsh & McLennan Cos., Inc.		31,514		6,640,630
Mastercard, Inc. Class A		74,236		32,749,954
Morgan Stanley		60,267		5,857,350
MSCI, Inc.		2,525		1,216,419
PayPal Holdings, Inc. (a)		140,879		8,175,208
S&P Global, Inc.		13,383		5,968,818
SEI Investments Co.		183,401		11,864,211
Visa, Inc. Class A		355,508		93,310,185
				221,115,063
Health Care — 11.6%
AstraZeneca PLC Sponsored ADR		42,808		3,338,596
Danaher Corp.		46,782		11,688,483
Elevance Health, Inc.		10,847		5,877,555
Eli Lilly & Co.		61,704		55,865,568
GRAIL, Inc. (a)		15,283		234,902
Humana, Inc.		15,664		5,852,854
Illumina, Inc. (a)		90,797		9,477,391
Intuitive Surgical, Inc. (a)		88,814		39,508,908
Novartis AG Sponsored ADR (b)		122,201		13,009,518
Novo Nordisk AS Sponsored ADR		183,697		26,220,910
Regeneron Pharmaceuticals, Inc. (a)		24,108		25,338,231
Roche Holding AG Sponsored ADR (b)		277,983		9,637,671
Stryker Corp.		23,493		7,993,493
Thermo Fisher Scientific, Inc.		48,581		26,865,293
UnitedHealth Group, Inc.		56,316		28,679,486
Vertex Pharmaceuticals, Inc. (a)		64,823		30,383,837
Zoetis, Inc.		31,720		5,498,979
				305,471,675
Industrials — 3.9%
Boeing Co. (a)		306,178		55,727,458
Cintas Corp.		4,531		3,172,878
Deere & Co.		15,068		5,629,857
Expeditors International of Washington, Inc.		122,192		15,248,340
GE Vernova, Inc. (a)		13,037		2,235,976
General Electric Co.		61,831		9,829,274
Old Dominion Freight Line, Inc.		23,456		4,142,329
TransDigm Group, Inc.		3,486		4,453,748
Veralto Corp.		9,819		937,420
				101,377,280
Information Technology — 37.9%
Advanced Micro Devices, Inc. (a)		56,424		9,152,537
Apple, Inc.		566,870		119,394,159
ASML Holding NV		18,226		18,640,277
Atlassian Corp. Class A (a)		19,123		3,382,476
Autodesk, Inc. (a)		123,230		30,493,264
Bill Holdings, Inc. (a)		34,671		1,824,388
Broadcom, Inc.		4,000		6,422,120
Canva, Inc. (Acquired 8/16/21-12/17/21, Cost $2,302,739) (a) (c) (d) (e)		1,351		1,441,059
Confluent, Inc. Class A (a)		58,406		1,724,729
Crowdstrike Holdings, Inc. Class A (a)		12,054		4,618,972
Datadog, Inc. Class A (a)		19,668		2,550,743

MassMutual Blue Chip Growth Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Fortinet, Inc. (a)		16,745	$	1,009,221
Gusto, Inc. (Acquired 10/04/21, Cost $765,943) (a) (c) (d) (e)		26,606		494,606
Intuit, Inc.		21,544		14,158,932
Lam Research Corp.		3,464		3,688,640
Microsoft Corp.		557,840		249,326,588
MongoDB, Inc. (a)		17,348		4,336,306
Monolithic Power Systems, Inc.		11,282		9,270,194
NVIDIA Corp.		2,396,938		296,117,721
Oracle Corp.		370,496		52,314,035
QUALCOMM, Inc.		118,319		23,566,778
Roper Technologies, Inc.		16,283		9,178,076
Salesforce, Inc.		123,720		31,808,412
ServiceNow, Inc. (a)		38,422		30,225,435
Shopify, Inc. Class A (a)		411,773		27,197,607
Snowflake, Inc. Class A (a)		13,060		1,764,275
Synopsys, Inc. (a)		28,185		16,771,766
Taiwan Semiconductor Manufacturing Co. Ltd. Sponsored ADR		38,047		6,612,949
TE Connectivity Ltd.		39,341		5,918,067
Texas Instruments, Inc.		11,230		2,184,572
Workday, Inc. Class A (a)		42,937		9,598,996
				995,187,900
Materials — 0.4%
Linde PLC (LIN US)		13,529		5,936,661
Sherwin-Williams Co.		18,317		5,466,342
				11,403,003
Utilities — 0.4%
Constellation Energy Corp.		52,051		10,424,254
TOTAL COMMON STOCK (Cost $1,374,852,878)				2,564,183,877
PREFERRED STOCK — 0.2%
Information Technology — 0.2%
Canva, Inc., Series A (Acquired 11/04/21-12/17/21, Cost $144,893) (a) (c) (d) (e)		85		90,666
Canva, Inc., Series A-3 (Acquired 11/04/21-12/17/21, Cost $17,043) (a) (c) (d) (e)		10		10,667
Databricks, Inc., Series G (Acquired 2/01/21, Cost $815,183) (a) (c) (d) (e)		13,788		1,013,418
Databricks, Inc., Series H (Acquired 8/31/21, Cost $2,202,319) (a) (c) (d) (e)		29,970		2,202,795
Gusto, Inc., Series E (Acquired 7/13/21, Cost $1,117,484) (a) (c) (d) (e)		36,765		683,461
				4,001,007
TOTAL PREFERRED STOCK (Cost $4,296,923)				4,001,007
TOTAL EQUITIES (Cost $1,379,149,801)				2,568,184,884

MassMutual Blue Chip Growth Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
BONDS & NOTES — 0.1%
CORPORATE DEBT — 0.1%
Retail — 0.1%
Carvana Co.
12.000% 12/01/28 (f)	$	812,093	$	873,265
13.000% 6/01/30 (f)		1,223,401		1,339,214
14.000% 6/01/31 (f)		1,454,184		1,635,496
				3,847,975
TOTAL CORPORATE DEBT (Cost $3,782,601)				3,847,975
TOTAL BONDS & NOTES (Cost $3,782,601)				3,847,975
TOTAL LONG-TERM INVESTMENTS (Cost $1,382,932,402)				2,572,032,859
	Number of Shares
SHORT-TERM INVESTMENTS — 1.5%
Investment of Cash Collateral from Securities Loaned — 0.0%
State Street Navigator Securities Lending Government Money Market Portfolio (g)		2,450		2,450
Mutual Fund — 0.0%
T. Rowe Price Government Reserve Investment Fund		110		110
	Principal Amount
Repurchase Agreement — 1.5%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/28/24, 1.600%, due 7/01/24 (h)	$	40,386,359		40,386,359
TOTAL SHORT-TERM INVESTMENTS (Cost $40,388,919)				40,388,919
TOTAL INVESTMENTS — 99.5% (Cost $1,423,321,321) (i)				2,612,421,778
Other Assets/(Liabilities) — 0.5%				12,950,168
NET ASSETS — 100.0%			$	2,625,371,946

Abbreviation Legend

ADR American Depositary Receipt

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Non-income producing security.

(b) Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2024, was $11,457,823 or 0.44% of net assets. The Fund received $11,893,675 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 June 30, 2024, these securities amounted to a value of $7,161,761 or 0.27% of net assets.

(d) Investment is valued using significant unobservable inputs.

(e) Restricted security. Certain securities are restricted to resale. At June 30, 2024, these securities amounted to a value of $7,161,761 or 0.27% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

(f) Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At June 30, 2024, the aggregate market value of these securities amounted to $3,847,975 or 0.15% of net assets.

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

(h) Maturity value of $40,391,744. Collateralized by U.S. Government Agency obligations with a rate of 4.500%, maturity date of 3/31/26, and an aggregate market value, including accrued interest, of $41,194,338.

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

MassMutual Growth Opportunities Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.9%
COMMON STOCK — 98.9%
Communication Services — 9.2%
Alphabet, Inc. Class A		24,001	$	4,371,782
Meta Platforms, Inc. Class A		8,878		4,476,465
Netflix, Inc. (a)		2,377		1,604,190
Sea Ltd. ADR (a)		24,500		1,749,790
				12,202,227
Consumer Discretionary — 10.9%
Airbnb, Inc. Class A (a)		6,051		917,513
Amazon.com, Inc. (a)		58,810		11,365,033
DoorDash, Inc., Class A (a)		11,217		1,220,185
Floor & Decor Holdings, Inc. Class A (a) (b)		9,765		970,739
				14,473,470
Financials — 13.0%
Block, Inc. (a)		26,733		1,724,011
CME Group, Inc.		12,303		2,418,770
KKR & Co., Inc.		13,345		1,404,428
Mastercard, Inc. Class A		6,798		2,999,006
NU Holdings Ltd. Class A (a)		213,678		2,754,309
S&P Global, Inc.		4,429		1,975,334
Visa, Inc. Class A		14,947		3,923,139
				17,198,997
Health Care — 12.0%
10X Genomics, Inc. Class A (a)		10,992		213,794
Align Technology, Inc. (a)		2,527		610,094
Danaher Corp.		5,736		1,433,139
Dexcom, Inc. (a)		22,594		2,561,708
Edwards Lifesciences Corp. (a)		42,817		3,955,006
Eli Lilly & Co.		1,520		1,376,178
Intuitive Surgical, Inc. (a)		4,272		1,900,399
IQVIA Holdings, Inc. (a)		5,027		1,062,909
Ultragenyx Pharmaceutical, Inc. (a)		27,310		1,122,441
Veeva Systems, Inc. Class A (a)		9,006		1,648,188
				15,883,856
Industrials — 8.5%
Boeing Co. (a)		9,464		1,722,543
Canadian Pacific Kansas City Ltd. (b)		28,517		2,245,144
Copart, Inc. (a)		26,565		1,438,760
Uber Technologies, Inc. (a)		47,174		3,428,606

MassMutual Growth Opportunities Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Waste Management, Inc.		11,762	$	2,509,305
				11,344,358
Information Technology — 43.2%
Advanced Micro Devices, Inc. (a)		10,472		1,698,663
Apple, Inc.		5,936		1,250,240
ASML Holding NV		2,905		2,971,031
Atlassian Corp. Class A (a)		10,791		1,908,712
Cloudflare, Inc. Class A (a)		7,625		631,579
Datadog, Inc. Class A (a)		26,528		3,440,416
Entegris, Inc. (b)		12,412		1,680,585
Lam Research Corp.		1,548		1,648,388
Microsoft Corp.		31,324		14,000,262
NVIDIA Corp.		119,302		14,738,569
Okta, Inc. (a)		18,626		1,743,580
Samsara, Inc. Class A (a)		30,652		1,032,972
ServiceNow, Inc. (a)		7,449		5,859,905
Shopify, Inc. Class A (a)		29,526		1,950,192
Snowflake, Inc. Class A (a)		9,798		1,323,612
Workday, Inc. Class A (a)		6,689		1,495,393
				57,374,099
Materials — 1.1%
Linde PLC (LIN US)		3,473		1,523,987
Real Estate — 1.0%
SBA Communications Corp.		6,614		1,298,328
TOTAL COMMON STOCK (Cost $89,362,040)				131,299,322
TOTAL EQUITIES (Cost $89,362,040)				131,299,322
TOTAL LONG-TERM INVESTMENTS (Cost $89,362,040)				131,299,322
SHORT-TERM INVESTMENTS — 2.8%
Investment of Cash Collateral from Securities Loaned — 1.7%
State Street Navigator Securities Lending Government Money Market Portfolio (c)		2,272,596		2,272,596
	Principal Amount
Repurchase Agreement — 1.1%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/28/24, 1.600%, due 7/01/24 (d)	$	1,537,190		1,537,190
TOTAL SHORT-TERM INVESTMENTS (Cost $3,809,786)				3,809,786
TOTAL INVESTMENTS — 101.7% (Cost $93,171,826) (e)				135,109,108
Other Assets/(Liabilities) — (1.7)%				(2,306,841)
NET ASSETS — 100.0%			$	132,802,267

Abbreviation Legend

ADR American Depositary Receipt

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Non-income producing security.

(b) Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2024, was $4,655,037 or 3.51% of net assets. The Fund received $2,498,342 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 $1,537,395. Collateralized by U.S. Government Agency obligations with a rate of 4.500%, maturity date of 3/31/26, and an aggregate market value, including accrued interest, of $1,568,266.

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

MassMutual Mid Cap Value Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.9%
COMMON STOCK — 98.6%
Communication Services — 7.6%
Altice USA, Inc. Class A (a)		44,483	$	90,745
BCE, Inc. (b)		5,235		169,557
EchoStar Corp. Class A (a)		6,842		121,856
Electronic Arts, Inc.		3,801		529,593
Fox Corp. Class A		10,400		357,448
Fox Corp. Class B		3,402		108,932
IAC, Inc. (a)		9,300		435,705
Interpublic Group of Cos., Inc.		9,126		265,475
Iridium Communications, Inc.		277		7,374
Liberty Broadband Corp. Class C (a)		9,200		504,344
Liberty Global Ltd. Class A (a)		26,500		461,895
Liberty Global Ltd. Class C (a)		844		15,066
Liberty Media Corp-Liberty SiriusXM Class C (a)		21,502		476,484
Match Group, Inc. (a)		6,500		197,470
News Corp. Class A		20,135		555,122
Omnicom Group, Inc.		643		57,677
Pinterest, Inc. Class A (a)		757		33,361
Roku, Inc. (a)		346		20,736
Spotify Technology SA (a)		246		77,192
Trade Desk, Inc. Class A (a)		922		90,052
TripAdvisor, Inc. (a)		3,338		59,450
Warner Bros Discovery, Inc. (a)		49,017		364,687
ZoomInfo Technologies, Inc. (a)		882		11,263
				5,011,484
Consumer Discretionary — 5.9%
Advance Auto Parts, Inc.		1,800		113,994
Aptiv PLC (a)		1,592		112,109
BorgWarner, Inc.		3,799		122,480
Carnival Corp. (a)		23,212		434,529
Carter's, Inc.		91		5,639
Coupang, Inc. (a)		3,580		75,001
Crocs, Inc. (a)		475		69,322
Darden Restaurants, Inc.		836		126,504
Deckers Outdoor Corp. (a)		75		72,596
Etsy, Inc. (a)		990		58,390
Garmin Ltd.		2,415		393,452
Hilton Worldwide Holdings, Inc.		1,408		307,226
LKQ Corp.		10,200		424,218
Mattel, Inc. (a)		8,586		139,608
Mohawk Industries, Inc. (a)		1,258		142,896
Ross Stores, Inc.		2,829		411,110
Skechers USA, Inc. Class A (a)		2,661		183,928
Sodexo SA		870		78,397
Tapestry, Inc.		5,737		245,486
Ulta Beauty, Inc. (a)		160		61,739

MassMutual Mid Cap Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Under Armour, Inc. Class A (a)		5,117	$	34,130
Wayfair, Inc. Class A (a) (b)		323		17,032
Wynn Resorts Ltd.		2,368		211,936
YETI Holdings, Inc. (a)		443		16,900
				3,858,622
Consumer Staples — 8.6%
Archer-Daniels-Midland Co.		6,800		411,060
Coca-Cola Consolidated, Inc.		31		33,635
Conagra Brands, Inc.		16,691		474,358
Dollar General Corp.		800		105,784
Dollar Tree, Inc. (a)		5,704		609,016
General Mills, Inc.		4,368		276,320
Heineken NV		1,856		179,149
Ingredion, Inc.		177		20,302
Kellanova		1,399		80,694
Kenvue, Inc.		13,597		247,193
Kimberly-Clark Corp.		2,679		370,238
Koninklijke Ahold Delhaize NV		14,353		423,638
Kroger Co.		7,192		359,096
Molson Coors Beverage Co. Class B		461		23,433
Performance Food Group Co. (a)		3,279		216,775
Pernod Ricard SA		978		133,093
Post Holdings, Inc. (a)		3,900		406,224
Tyson Foods, Inc. Class A		9,100		519,974
US Foods Holding Corp (a)		6,512		345,006
Walgreens Boots Alliance, Inc.		34,900		422,115
				5,657,103
Energy — 5.2%
Baker Hughes Co.		20,962		737,234
Cheniere Energy, Inc.		507		88,639
Civitas Resources, Inc.		234		16,146
Coterra Energy, Inc.		6,102		162,740
Enterprise Products Partners LP (c)		15,611		452,407
EQT Corp.		4,837		178,872
HF Sinclair Corp.		4,222		225,201
Kinder Morgan, Inc.		25,900		514,633
Marathon Oil Corp.		1,437		41,199
Noble Corp. PLC		4,500		200,925
Occidental Petroleum Corp.		4,068		256,406
Ovintiv, Inc.		948		44,433
TechnipFMC PLC		2,001		52,326
Williams Cos., Inc.		11,000		467,500
				3,438,661
Financials — 15.5%
Aflac, Inc.		1,209		107,976
AllianceBernstein Holding LP (c)		2,501		84,509
Allstate Corp.		4,987		796,224
Ally Financial, Inc.		9,429		374,048
Arch Capital Group Ltd. (a)		1,400		141,246
Axis Capital Holdings Ltd.		438		30,945
Bank of New York Mellon Corp.		8,444		505,711
Bank OZK		529		21,689
Cboe Global Markets, Inc.		1,460		248,288

MassMutual Mid Cap Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Coinbase Global, Inc. Class A (a)		454	$	100,892
Comerica, Inc.		319		16,282
Commerce Bancshares, Inc.		3,934		219,439
Corpay, Inc. (a)		1,600		426,256
Euronet Worldwide, Inc. (a)		657		68,000
Fidelity National Financial, Inc.		8,500		420,070
Fidelity National Information Services, Inc.		3,500		263,760
First Citizens BancShares, Inc. Class A		194		326,620
First Hawaiian, Inc.		5,899		122,463
First Horizon Corp.		16,149		254,670
Global Payments, Inc.		4,800		464,160
Hanover Insurance Group, Inc.		1,502		188,411
Hartford Financial Services Group, Inc.		3,998		401,959
Huntington Bancshares, Inc.		3,882		51,165
Interactive Brokers Group, Inc. Class A		2,600		318,760
LPL Financial Holdings, Inc.		286		79,880
Markel Group, Inc. (a)		300		472,698
MSCI, Inc.		755		363,721
Northern Trust Corp.		5,087		427,206
Old Republic International Corp.		3,700		114,330
PNC Financial Services Group, Inc.		876		136,201
Popular, Inc.		347		30,685
Reinsurance Group of America, Inc.		2,774		569,419
Shift4 Payments, Inc. Class A (a) (b)		934		68,509
State Street Corp.		3,305		244,570
Synchrony Financial		1,631		76,967
T. Rowe Price Group, Inc.		2,455		283,086
TPG, Inc.		493		20,435
Truist Financial Corp.		8,924		346,697
US Bancorp		3,632		144,190
Westamerica BanCorp		2,726		132,293
Willis Towers Watson PLC		2,910		762,827
				10,227,257
Health Care — 12.8%
Agilent Technologies, Inc.		3,093		400,946
Baxter International, Inc.		13,400		448,230
Becton Dickinson & Co.		901		210,573
Bio-Rad Laboratories, Inc. Class A (a)		1,695		462,921
Cardinal Health, Inc.		2,932		288,274
Cencora, Inc.		274		61,732
Centene Corp. (a)		8,714		577,738
DENTSPLY SIRONA, Inc.		4,369		108,832
Elanco Animal Health, Inc. (a)		8,564		123,578
Encompass Health Corp.		2,477		212,502
Envista Holdings Corp. (a)		7,022		116,776
GE HealthCare Technologies, Inc. (a)		1,702		132,620
Henry Schein, Inc. (a)		10,267		658,115
Hologic, Inc. (a)		3,382		251,113
Incyte Corp. (a)		284		17,216
Jazz Pharmaceuticals PLC (a)		4,700		501,631
Koninklijke Philips NV (a) (b)		12,585		317,142
Labcorp Holdings, Inc.		3,538		720,018
Neurocrine Biosciences, Inc. (a)		292		40,200
Organon & Co.		14,500		300,150
Perrigo Co. PLC		18,600		477,648
Quest Diagnostics, Inc.		3,042		416,389
United Therapeutics Corp. (a)		697		222,029

MassMutual Mid Cap Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Universal Health Services, Inc. Class B		1,684	$	311,422
Veeva Systems, Inc. Class A (a)		361		66,067
Viatris, Inc.		31,300		332,719
Zimmer Biomet Holdings, Inc.		6,288		682,437
				8,459,018
Industrials — 13.8%
Advanced Drainage Systems, Inc.		121		19,407
Allison Transmission Holdings, Inc.		3,722		282,500
Atkore, Inc.		514		69,354
AZEK Co., Inc. (a)		521		21,950
Beacon Roofing Supply, Inc. (a)		2,648		239,644
Builders FirstSource, Inc. (a)		700		96,887
Bunzl PLC		6,915		262,309
Carlisle Cos., Inc.		267		108,191
Cie de Saint-Gobain SA		1,218		94,323
Clarivate PLC (a) (b)		53,000		301,570
CNH Industrial NV		17,600		178,288
Cummins, Inc.		1,939		536,967
Curtiss-Wright Corp.		955		258,786
Delta Air Lines, Inc.		4,600		218,224
Donaldson Co., Inc.		770		55,101
Dover Corp.		339		61,172
EMCOR Group, Inc.		487		177,794
Emerson Electric Co.		3,152		347,224
Ferguson PLC		461		89,273
Flowserve Corp.		346		16,642
Fortive Corp.		5,129		380,059
Graco, Inc.		267		21,168
Heartland Express, Inc.		1,048		12,922
Howmet Aerospace, Inc.		4,044		313,936
Huntington Ingalls Industries, Inc.		2,703		665,830
IDEX Corp.		184		37,021
ITT, Inc.		1,868		241,308
Jacobs Solutions, Inc.		1,200		167,652
Johnson Controls International PLC		2,150		142,910
Kirby Corp. (a)		997		119,371
Leidos Holdings, Inc.		2,468		360,032
Lincoln Electric Holdings, Inc.		109		20,562
MSA Safety, Inc.		113		21,209
MSC Industrial Direct Co., Inc. Class A		3,183		252,444
Norfolk Southern Corp.		1,878		403,188
Oshkosh Corp.		2,265		245,073
Owens Corning		1,935		336,148
PACCAR, Inc.		2,370		243,968
Parker-Hannifin Corp.		269		136,063
Republic Services, Inc.		1,008		195,895
Southwest Airlines Co.		9,665		276,516
SS&C Technologies Holdings, Inc.		567		35,534
Timken Co.		1,413		113,224
Trane Technologies PLC		255		83,877
United Airlines Holdings, Inc. (a)		1,345		65,448
Veralto Corp.		759		72,462
Vertiv Holdings Co. Class A		1,066		92,284
Vinci SA		2,320		244,052
W.W. Grainger, Inc.		97		87,517

MassMutual Mid Cap Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Woodward, Inc.		1,491	$	260,000
				9,083,279
Information Technology — 6.7%
Amdocs Ltd.		3,322		262,172
Amkor Technology, Inc.		587		23,492
Cirrus Logic, Inc. (a)		1,751		223,533
Cognizant Technology Solutions Corp. Class A		2,606		177,208
Crowdstrike Holdings, Inc. Class A (a)		263		100,779
Datadog, Inc. Class A (a)		757		98,175
DocuSign, Inc. (a)		1,466		78,431
Dropbox, Inc. Class A (a)		1,020		22,919
Dynatrace, Inc. (a)		1,575		70,465
EPAM Systems, Inc. (a)		132		24,831
F5, Inc. (a)		1,661		286,074
Hewlett Packard Enterprise Co.		8,956		189,598
HP, Inc.		8,982		314,550
IPG Photonics Corp. (a)		478		40,338
Juniper Networks, Inc.		4,662		169,977
Monolithic Power Systems, Inc.		42		34,511
NetApp, Inc.		532		68,522
ON Semiconductor Corp. (a)		1,556		106,664
Pure Storage, Inc. Class A (a)		1,197		76,859
Qorvo, Inc. (a)		2,669		309,711
Smartsheet, Inc. Class A (a)		2,124		93,626
TD SYNNEX Corp.		1,600		184,640
TE Connectivity Ltd.		1,339		201,426
Teradyne, Inc.		409		60,651
Twilio, Inc. Class A (a)		3,717		211,163
UiPath, Inc. Class A (a)		578		7,329
VeriSign, Inc. (a)		1,974		350,977
Vontier Corp.		10,502		401,176
Zoom Video Communications, Inc. Class A (a)		3,334		197,339
				4,387,136
Materials — 4.9%
Akzo Nobel NV		3,074		186,906
Amcor PLC		6,941		67,883
Cleveland-Cliffs, Inc. (a)		10,212		157,163
Commercial Metals Co.		5,100		280,449
Corteva, Inc.		2,837		153,028
CRH PLC		1,560		116,969
DuPont de Nemours, Inc.		1,129		90,873
Graphic Packaging Holding Co.		20,136		527,764
Louisiana-Pacific Corp.		2,048		168,612
LyondellBasell Industries NV Class A		3,819		365,325
Mosaic Co.		23,215		670,913
Packaging Corp. of America		1,277		233,129
RPM International, Inc.		269		28,966
Sonoco Products Co.		3,630		184,114
				3,232,094
Real Estate — 5.8%
Cousins Properties, Inc.		449		10,394
Crown Castle, Inc.		1,200		117,240
EastGroup Properties, Inc.		1,197		203,610

MassMutual Mid Cap Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
EPR Properties		587	$	24,642
Equity Residential		9,285		643,822
Essex Property Trust, Inc.		311		84,654
Gaming & Leisure Properties, Inc.		8,000		361,680
Healthpeak Properties, Inc.		14,771		289,512
Host Hotels & Resorts, Inc.		6,195		111,386
JBG SMITH Properties		17,771		270,652
Medical Properties Trust, Inc.		3,735		16,098
Mid-America Apartment Communities, Inc.		569		81,145
Public Storage		811		233,284
Realty Income Corp.		6,466		341,534
Regency Centers Corp.		3,562		221,557
Simon Property Group, Inc.		2,776		421,397
VICI Properties, Inc.		4,975		142,484
Weyerhaeuser Co.		9,047		256,844
				3,831,935
Utilities — 11.8%
Atmos Energy Corp.		396		46,193
CenterPoint Energy, Inc.		13,100		405,838
CMS Energy Corp.		2,992		178,114
Constellation Energy Corp.		1,552		310,819
Dominion Energy, Inc.		15,900		779,100
Duke Energy Corp.		3,355		336,272
Edison International		10,793		775,045
Entergy Corp.		2,223		237,861
Evergy, Inc.		16,166		856,313
Eversource Energy		10,124		574,132
National Fuel Gas Co.		6,200		335,978
NiSource, Inc.		21,100		607,891
Northwestern Energy Group, Inc.		7,523		376,752
OGE Energy Corp.		16,419		586,158
ONE Gas, Inc.		2,834		180,951
PG&E Corp.		23,012		401,789
Pinnacle West Capital Corp.		1,626		124,194
Spire, Inc.		3,505		212,859
Vistra Corp.		518		44,537
WEC Energy Group, Inc.		3,469		272,178
Xcel Energy, Inc.		2,109		112,642
				7,755,616
TOTAL COMMON STOCK (Cost $63,469,086)				64,942,205
PREFERRED STOCK — 0.3%
Consumer Staples — 0.3%
Henkel AG & Co. KGaA 2.236%
		1,942		173,059
TOTAL PREFERRED STOCK (Cost $136,190)				173,059
TOTAL EQUITIES (Cost $63,605,276)				65,115,264
TOTAL LONG-TERM INVESTMENTS (Cost $63,605,276)				65,115,264

MassMutual Mid Cap Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
SHORT-TERM INVESTMENTS — 2.1%
Investment of Cash Collateral from Securities Loaned — 0.0%
State Street Navigator Securities Lending Government Money Market Portfolio (d)		19,080	$	19,080
	Principal Amount
Repurchase Agreement — 2.1%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/28/24, 1.600%, due 7/01/24 (e)	$	1,418,988		1,418,988
TOTAL SHORT-TERM INVESTMENTS (Cost $1,438,068)				1,438,068
TOTAL INVESTMENTS — 101.0% (Cost $65,043,344) (f)				66,553,332
Other Assets/(Liabilities) — (1.0)%				(680,870)
NET ASSETS — 100.0%			$	65,872,462

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 June 30, 2024, was $603,377 or 0.92% of net assets. The Fund received $614,759 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 $1,419,177. Collateralized by U.S. Government Agency obligations with a rate of 4.500%, maturity date of 3/31/26, and an aggregate market value, including accrued interest, of $1,447,463.

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

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
Bank of America N.A.	9/27/24	EUR	36,974	USD	39,813	$	(50)
Bank of America N.A.	9/27/24	USD	336,688	EUR	312,044		1,111
Bank of America N.A.	9/27/24	USD	146,522	CAD	199,616		308
Citibank N.A.	9/27/24	USD	336,534	EUR	312,044		958
Goldman Sachs & Co.	9/27/24	USD	225,705	GBP	177,743		877
Morgan Stanley & Co. LLC	9/27/24	USD	336,888	EUR	312,044		1,312
UBS AG	9/27/24	USD	336,686	EUR	312,044		1,109
						$	5,625

Currency Legend

CAD Canadian Dollar

EUR Euro

GBP British Pound

USD U.S. Dollar

MassMutual Small Cap Value Equity Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.7%
COMMON STOCK — 98.7%
Communication Services — 0.6%
Shutterstock, Inc. (a)		6,376	$	246,751
Consumer Discretionary — 10.8%
Adient PLC (b)		14,966		369,810
American Axle & Manufacturing Holdings, Inc. (b)		54,379		380,109
Aramark		10,625		361,463
Century Communities, Inc.		2,559		208,968
Dave & Buster's Entertainment, Inc. (b)		7,317		291,290
Five Below, Inc. (b)		1,490		162,365
Gentherm, Inc. (b)		8,813		434,657
Goodyear Tire & Rubber Co. (b)		22,337		253,525
Kontoor Brands, Inc.		3,589		237,412
LKQ Corp.		4,143		172,307
Monro, Inc.		7,553		180,215
Oxford Industries, Inc.		2,625		262,894
Sonos, Inc. (b)		19,103		281,960
Tri Pointe Homes, Inc. (b)		7,356		274,011
Visteon Corp. (b)		2,356		251,385
Wyndham Hotels & Resorts, Inc.		3,853		285,122
				4,407,493
Consumer Staples — 4.8%
Darling Ingredients, Inc. (b)		12,638		464,446
Hain Celestial Group, Inc. (b)		52,716		364,268
Post Holdings, Inc. (b)		2,694		280,607
Spectrum Brands Holdings, Inc.		3,419		293,795
SunOpta, Inc. (b)		46,896		253,238
US Foods Holding Corp (b)		5,354		283,655
				1,940,009
Energy — 4.2%
Antero Resources Corp. (b)		7,768		253,470
Atlas Energy Solutions, Inc. (a)		24,944		497,134
Chesapeake Energy Corp. (a)		3,315		272,460
Chord Energy Corp.		2,182		365,878
Sitio Royalties Corp. Class A		14,412		340,267
				1,729,209
Financials — 18.2%
Assured Guaranty Ltd.		3,473		267,942
Bank OZK		6,708		275,028
Bread Financial Holdings, Inc.		7,170		319,495
Burford Capital Ltd.		28,270		368,924
Cadence Bank		9,430		266,680
Columbia Banking System, Inc.		21,618		429,982

MassMutual Small Cap Value Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Everest Group Ltd.		596	$	227,088
First Citizens BancShares, Inc. Class A		241		405,750
Hancock Whitney Corp.		6,011		287,506
Houlihan Lokey, Inc.		2,045		275,789
Kemper Corp.		5,662		335,927
Live Oak Bancshares, Inc.		14,301		501,393
NMI Holdings, Inc. Class A (b)		6,513		221,703
OFG Bancorp		14,852		556,207
ProAssurance Corp. (b)		13,029		159,214
Reinsurance Group of America, Inc.		1,156		237,292
Seacoast Banking Corp. of Florida		10,378		245,336
Synovus Financial Corp.		6,123		246,083
Texas Capital Bancshares, Inc. (b)		10,112		618,248
Triumph Financial, Inc. (b)		8,148		666,099
Webster Financial Corp.		5,882		256,396
White Mountains Insurance Group Ltd.		137		248,991
				7,417,073
Health Care — 3.2%
Acadia Healthcare Co., Inc. (b)		2,559		172,835
AMN Healthcare Services, Inc. (b)		3,599		184,377
Haemonetics Corp. (b)		3,055		252,740
ICU Medical, Inc. (b)		2,159		256,381
Integra LifeSciences Holdings Corp. (b)		8,798		256,374
ModivCare, Inc. (b)		6,319		165,810
				1,288,517
Industrials — 25.2%
Air Lease Corp.		7,409		352,150
Air Transport Services Group, Inc. (b)		27,486		381,231
American Woodmark Corp. (b)		3,356		263,782
Brady Corp. Class A		4,476		295,506
Columbus McKinnon Corp.		9,595		331,411
DNOW, Inc. (b)		34,257		470,349
Enerpac Tool Group Corp.		22,025		840,914
Enviri Corp. (b)		49,390		426,236
Fortune Brands Innovations, Inc.		4,271		277,359
Generac Holdings, Inc. (b)		1,546		204,412
Gibraltar Industries, Inc. (b)		7,816		535,787
Greenbrier Cos., Inc.		14,966		741,565
Helios Technologies, Inc.		8,170		390,117
Huron Consulting Group, Inc. (b)		2,266		223,201
Interface, Inc.		26,774		393,042
Janus International Group, Inc. (b)		18,575		234,602
John Bean Technologies Corp.		1,956		185,761
Kennametal, Inc.		18,958		446,271
Kirby Corp. (b)		6,585		788,422
Knight-Swift Transportation Holdings, Inc.		3,518		175,619
Maximus, Inc.		2,294		196,596
Middleby Corp. (b)		2,296		281,513
Ryder System, Inc.		2,330		288,640
Science Applications International Corp.		1,507		177,148
Standex International Corp.		2,328		375,157
Vestis Corp.		24,285		297,006
WillScot Mobile Mini Holdings Corp. (b)		12,638		475,694

MassMutual Small Cap Value Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
WNS Holdings Ltd. (b)		4,969	$	260,872
				10,310,363
Information Technology — 13.2%
ACI Worldwide, Inc. (b)		10,064		398,434
Belden, Inc.		3,869		362,912
Ciena Corp. (b)		12,472		600,901
Coherent Corp. (b)		15,348		1,112,116
CTS Corp.		4,226		213,962
Diodes, Inc. (b)		7,816		562,205
ePlus, Inc. (b)		3,426		252,428
Infinera Corp. (a) (b)		100,019		609,116
Knowles Corp. (b)		12,933		223,224
Progress Software Corp.		6,436		349,217
Tower Semiconductor Ltd. (b)		18,126		712,533
				5,397,048
Materials — 10.6%
ATI, Inc. (b)		12,638		700,777
Axalta Coating Systems Ltd. (b)		10,407		355,607
Cabot Corp.		2,717		249,665
Element Solutions, Inc.		14,507		393,430
Ferroglobe PLC		70,926		380,163
HB Fuller Co.		3,339		256,969
Kaiser Aluminum Corp.		7,649		672,347
Materion Corp.		4,073		440,414
Mativ Holdings, Inc.		16,631		282,062
Sealed Air Corp.		6,957		242,034
TriMas Corp.		14,560		372,154
				4,345,622
Real Estate — 6.2%
Alexander & Baldwin, Inc.		9,819		166,530
Centerspace		3,245		219,459
Colliers International Group, Inc. (a)		2,406		268,630
DiamondRock Hospitality Co.		28,529		241,070
Independence Realty Trust, Inc.		17,173		321,822
Kimco Realty Corp.		15,787		307,215
LXP Industrial Trust		18,543		169,112
NETSTREIT Corp.		14,431		232,339
Pebblebrook Hotel Trust		7,908		108,735
Phillips Edison & Co., Inc.		7,636		249,774
PotlatchDeltic Corp.		6,668		262,653
				2,547,339
Utilities — 1.7%
ONE Gas, Inc.		4,258		271,874
PNM Resources, Inc.		5,122		189,309

MassMutual Small Cap Value Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Portland General Electric Co.		5,730	$	247,765
				708,948
TOTAL COMMON STOCK (Cost $36,502,549)				40,338,372
TOTAL EQUITIES (Cost $36,502,549)				40,338,372
TOTAL LONG-TERM INVESTMENTS (Cost $36,502,549)				40,338,372
SHORT-TERM INVESTMENTS — 3.8%
Investment of Cash Collateral from Securities Loaned — 1.3%
State Street Navigator Securities Lending Government Money Market Portfolio (c)		520,758		520,758
	Principal Amount
Repurchase Agreement — 2.5%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/28/24, 1.600%, due 7/01/24 (d)	$	1,014,481		1,014,481
TOTAL SHORT-TERM INVESTMENTS (Cost $1,535,239)				1,535,239
TOTAL INVESTMENTS — 102.5% (Cost $38,037,788) (e)				41,873,611
Other Assets/(Liabilities) — (2.5)%				(1,021,370)
NET ASSETS — 100.0%			$	40,852,241

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 June 30, 2024, was $1,778,795 or 4.35% of net assets. The Fund received $1,246,183 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

(b) Non-income producing security.

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

(d) Maturity value of $1,014,617. Collateralized by U.S. Government Agency obligations with a rate of 4.500%, maturity date of 3/31/26, and an aggregate market value, including accrued interest, of $1,034,977.

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

MassMutual Small Company Value Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 100.5%
COMMON STOCK — 100.5%
Communication Services — 2.4%
Cable One, Inc. (a)		1,129	$	399,666
Criteo SA Sponsored ADR (b)		30,333		1,144,161
Entravision Communications Corp. Class A		51,956		105,471
Nexstar Media Group, Inc.		7,413		1,230,632
Townsquare Media, Inc. Class A		2,889		31,663
				2,911,593
Consumer Discretionary — 12.3%
A-Mark Precious Metals, Inc.		7,209		233,355
Accel Entertainment, Inc. (b)		16,477		169,054
Adient PLC (b)		47,530		1,174,466
ADT, Inc.		175,417		1,333,169
AutoNation, Inc. (b)		7,280		1,160,287
BorgWarner, Inc.		34,129		1,100,319
Boyd Gaming Corp.		5,179		285,363
BRP, Inc. (a)		4,777		305,871
Brunswick Corp.		5,877		427,669
Build-A-Bear Workshop, Inc. (a)		27,512		695,228
Cavco Industries, Inc. (b)		469		162,354
Citi Trends, Inc. (b)		24,623		523,485
Dana, Inc.		44,503		539,376
Dave & Buster's Entertainment, Inc. (b)		6,027		239,935
Dine Brands Global, Inc.		14,655		530,511
Everi Holdings, Inc. (b)		12,561		105,512
Genesco, Inc. (b)		31,380		811,487
KB Home		12,129		851,213
Malibu Boats, Inc. Class A (b)		1,011		35,426
MarineMax, Inc. (b)		9,692		313,730
OneWater Marine, Inc. Class A (a) (b)		8,043		221,746
Penske Automotive Group, Inc.		1,506		224,424
Red Robin Gourmet Burgers, Inc. (b)		1,298		9,826
Skyline Champion Corp. (b)		7,019		475,537
Solo Brands, Inc. Class A (a) (b)		27,471		62,634
Tapestry, Inc.		15,978		683,699
Taylor Morrison Home Corp. (b)		18,206		1,009,341
Topgolf Callaway Brands Corp. (b)		16,030		245,259
Visteon Corp. (b)		1,821		194,301
Winnebago Industries, Inc.		17,901		970,234
				15,094,811
Consumer Staples — 2.0%
Edgewell Personal Care Co.		15,441		620,574
Nomad Foods Ltd.		72,391		1,193,004
Spectrum Brands Holdings, Inc.		5,862		503,721

MassMutual Small Company Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Turning Point Brands, Inc.		4,210	$	135,099
				2,452,398
Energy — 9.6%
Cactus, Inc. Class A		34,347		1,811,461
ChampionX Corp.		43,376		1,440,517
Chord Energy Corp.		3,467		581,346
Crescent Energy Co. Class A		28,789		341,150
HF Sinclair Corp.		8,512		454,030
International Seaways, Inc.		6,468		382,453
Mach Natural Resources LP		10,013		190,447
Magnolia Oil & Gas Corp. Class A		86,348		2,188,058
Matador Resources Co.		23,867		1,422,473
NexGen Energy Ltd. (a) (b)		101,970		711,751
Northern Oil & Gas, Inc.		49,817		1,851,698
Permian Resources Corp.		21,102		340,797
TXO Partners LP		4,812		97,010
				11,813,191
Financials — 25.5%
1st Source Corp.		16,098		863,175
Ameris Bancorp		7,889		397,211
Associated Banc-Corp.		57,585		1,217,923
Axis Capital Holdings Ltd.		10,945		773,264
Axos Financial, Inc. (b)		2,472		141,275
Banc of California, Inc.		11,673		149,181
Bank of Marin Bancorp		19,976		323,411
BankUnited, Inc.		41,079		1,202,382
Berkshire Hills Bancorp, Inc.		37,033		844,352
Bowhead Specialty Holdings, Inc. (b)		2,356		59,701
Carter Bankshares, Inc. (b)		37,965		574,031
Columbia Banking System, Inc.		21,535		428,331
Comerica, Inc.		14,960		763,558
Compass Diversified Holdings		27,556		603,201
CVB Financial Corp.		26,559		457,877
Euronet Worldwide, Inc. (b)		4,861		503,114
EVERTEC, Inc.		21,466		713,745
Federated Hermes, Inc.		32,757		1,077,050
Fidelis Insurance Holdings Ltd.		12,437		202,848
First BanCorp		82,319		1,505,615
First Busey Corp.		49,766		1,204,835
First Interstate BancSystem, Inc. Class A		10,998		305,414
First Merchants Corp.		4,377		145,710
FNB Corp.		59,945		820,048
Hamilton Insurance Group Ltd. Class B (b)		10,471		174,342
Hanover Insurance Group, Inc.		4,359		546,793
HarborOne Bancorp, Inc.		66,815		743,651
Heritage Financial Corp.		49,445		891,493
Home BancShares, Inc.		25,738		616,683
Moelis & Co. Class A		11,536		655,937
NCR Atleos Corp. (b)		40,409		1,091,851
Nicolet Bankshares, Inc.		9,353		776,673
Old National Bancorp		53,476		919,252
Pacific Premier Bancorp, Inc.		60,995		1,401,055
Patria Investments Ltd. Class A		9,754		117,633
Peoples Bancorp, Inc.		17,428		522,840
Popular, Inc.		3,705		327,633

MassMutual Small Company Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Premier Financial Corp.		38,471	$	787,117
Provident Financial Services, Inc.		3,337		47,886
Repay Holdings Corp. (b)		12,500		132,000
SouthState Corp.		8,280		632,758
StoneX Group, Inc. (b)		1,387		104,455
Texas Capital Bancshares, Inc. (b)		18,740		1,145,764
TriCo Bancshares		23,062		912,563
UMB Financial Corp.		5,364		447,465
Valley National Bancorp		9,628		67,203
Walker & Dunlop, Inc.		12,310		1,208,842
Webster Financial Corp.		12,732		554,988
WSFS Financial Corp.		23,740		1,115,780
				31,219,909
Health Care — 3.3%
Acadia Healthcare Co., Inc. (b)		6,639		448,398
AMN Healthcare Services, Inc. (b)		14,329		734,075
Embecta Corp.		15,624		195,300
Enovis Corp. (b)		7,621		344,469
Envista Holdings Corp. (b)		15,668		260,559
Fortrea Holdings, Inc. (b)		27,486		641,523
Integra LifeSciences Holdings Corp. (b)		26,394		769,121
Pediatrix Medical Group, Inc. (b)		89,600		676,480
				4,069,925
Industrials — 19.0%
ABM Industries, Inc.		26,339		1,331,963
Alaska Air Group, Inc. (b)		18,041		728,856
ArcBest Corp.		10,807		1,157,214
Atmus Filtration Technologies, Inc. (b)		9,272		266,848
Barrett Business Services, Inc.		2,380		77,993
Beacon Roofing Supply, Inc. (b)		6,578		595,309
Blue Bird Corp. (b)		29,514		1,589,329
BrightView Holdings, Inc. (b)		83,809		1,114,660
Brink's Co.		7,245		741,888
Deluxe Corp.		10,271		230,687
DIRTT Environmental Solutions (a) (b)		64,948		27,278
DXP Enterprises, Inc. (b)		3,410		156,314
Fluor Corp. (b)		26,721		1,163,700
Franklin Covey Co. (b)		24,007		912,266
Gates Industrial Corp. PLC (b)		83,634		1,322,253
GMS, Inc. (b)		7,323		590,307
Great Lakes Dredge & Dock Corp. (b)		124,823		1,095,946
Hayward Holdings, Inc. (b)		24,179		297,402
Hillman Solutions Corp. (b)		126,096		1,115,950
IBEX Holdings Ltd. (b)		6,356		102,840
John Bean Technologies Corp.		9,489		901,170
Karat Packaging, Inc.		565		16,713
Korn Ferry		6,777		455,008
Loomis AB		7,447		194,278
Luxfer Holdings PLC		3,132		36,300
MasTec, Inc. (b)		10,491		1,122,432
MillerKnoll, Inc.		41,679		1,104,077
NV5 Global, Inc. (b)		2,322		215,876
Proficient Auto Logistics, Inc. (b)		6,182		99,283
REV Group, Inc.		50,096		1,246,889
Science Applications International Corp.		1,849		217,350

MassMutual Small Company Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Sensata Technologies Holding PLC		5,154	$	192,708
Shyft Group, Inc.		47,449		562,745
Tecnoglass, Inc.		24,622		1,235,532
Timken Co.		9,754		781,588
Titan Machinery, Inc. (b)		5,657		89,946
UL Solutions, Inc. Class A		3,734		157,537
Verra Mobility Corp. (b)		2,973		80,866
				23,329,301
Information Technology — 11.4%
ACI Worldwide, Inc. (b)		15,159		600,145
Amkor Technology, Inc.		31,129		1,245,783
Avnet, Inc.		11,103		571,693
Axcelis Technologies, Inc. (b)		1,894		269,308
Belden, Inc.		11,096		1,040,805
Calix, Inc. (b)		31,696		1,122,989
Coherent Corp. (b)		9,528		690,399
Cohu, Inc. (b)		20,700		685,170
CommVault Systems, Inc. (b)		4,642		564,328
Extreme Networks, Inc. (b)		26,873		361,442
Grid Dynamics Holdings, Inc. (b)		81,136		852,739
Harmonic, Inc. (b)		83,668		984,772
Ichor Holdings Ltd. (b)		23,088		890,042
Kulicke & Soffa Industries, Inc.		9,482		466,420
SMART Global Holdings, Inc. (b)		51,984		1,188,874
Synaptics, Inc. (b)		9,984		880,589
Teradata Corp. (b)		16,973		586,587
TTM Technologies, Inc. (b)		53,131		1,032,335
				14,034,420
Materials — 6.0%
AdvanSix, Inc.		42,254		968,462
Avient Corp.		26,803		1,169,951
Ecovyst, Inc. (b)		108,500		973,245
Element Solutions, Inc.		36,948		1,002,030
Graphic Packaging Holding Co.		32,022		839,297
Ingevity Corp. (b)		3,575		156,263
Minerals Technologies, Inc.		3,387		281,663
O-I Glass, Inc. (b)		76,291		849,119
Pactiv Evergreen, Inc.		19,582		221,668
Silgan Holdings, Inc.		20,032		847,954
				7,309,652
Real Estate — 7.0%
Acadia Realty Trust		62,980		1,128,602
Broadstone Net Lease, Inc.		47,065		746,922
CareTrust REIT, Inc.		10,103		253,585
First Industrial Realty Trust, Inc.		17,528		832,755
Independence Realty Trust, Inc.		79,240		1,484,958
National Storage Affiliates Trust		12,848		529,595
NETSTREIT Corp. (a)		45,245		728,444
Ryman Hospitality Properties, Inc.		13,184		1,316,554
STAG Industrial, Inc.		20,857		752,103
Terreno Realty Corp.		8,782		519,719

MassMutual Small Company Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
UMH Properties, Inc.		14,325	$	229,057
				8,522,294
Utilities — 2.0%
ALLETE, Inc.		534		33,295
IDACORP, Inc.		11,676		1,087,620
Portland General Electric Co.		23,793		1,028,809
Southwest Gas Holdings, Inc.		4,176		293,907
				2,443,631
TOTAL COMMON STOCK (Cost $120,449,080)				123,201,125
TOTAL EQUITIES (Cost $120,449,080)				123,201,125
TOTAL LONG-TERM INVESTMENTS (Cost $120,449,080)				123,201,125
SHORT-TERM INVESTMENTS — 2.1%
Investment of Cash Collateral from Securities Loaned — 0.9%
State Street Navigator Securities Lending Government Money Market Portfolio (c)		1,053,009		1,053,009
	Principal Amount
Repurchase Agreement — 1.2%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/28/24, 1.600%, due 7/01/24 (d)	$	1,529,149		1,529,149
TOTAL SHORT-TERM INVESTMENTS (Cost $2,582,158)				2,582,158
TOTAL INVESTMENTS — 102.6% (Cost $123,031,238) (e)				125,783,283
Other Assets/(Liabilities) — (2.6)%				(3,181,511)
NET ASSETS — 100.0%			$	122,601,772

Abbreviation Legend

ADR American Depositary Receipt

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2024, was $3,042,174 or 2.48% of net assets. The Fund received $2,110,935 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

(b) Non-income producing security.

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

(d) Maturity value of $1,529,353. Collateralized by U.S. Government Agency obligations with a rate of 4.500%, maturity date of 3/31/26, and an aggregate market value, including accrued interest, of $1,559,975.

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

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
Citibank N.A.	9/27/24	SEK	65,831	USD	6,259	$	(20)
Citibank N.A.	9/27/24	USD	173,217	SEK	1,807,834		1,894
						$	1,874

Currency Legend

SEK Swedish Krona

USD U.S. Dollar

MassMutual Mid Cap Growth Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 96.7%
COMMON STOCK — 96.4%
Communication Services — 5.1%
Liberty Media Corp-Liberty Formula One Class C (a)		512,124	$	36,790,988
Match Group, Inc. (a) (b)		819,591		24,899,174
New York Times Co. Class A		415,400		21,272,634
Pinterest, Inc. Class A (a)		330,985		14,586,509
Reddit, Inc. Class A (a)		78,076		4,988,276
Spotify Technology SA (a)		128,100		40,196,499
Trade Desk, Inc. Class A (a)		1,156,385		112,944,123
				255,678,203
Consumer Discretionary — 12.3%
Bath & Body Works, Inc.		608,264		23,752,710
Birkenstock Holding PLC (a)		203,358		11,064,709
BorgWarner, Inc.		263,228		8,486,471
Bright Horizons Family Solutions, Inc. (a)		279,578		30,775,946
Burlington Stores, Inc. (a)		220,650		52,956,000
Caesars Entertainment, Inc. (a)		690,544		27,442,219
Chipotle Mexican Grill, Inc. (a)		276,850		17,344,652
Domino's Pizza, Inc.		180,233		93,059,705
DraftKings, Inc. Class A (a)		936,479		35,745,403
Five Below, Inc. (a)		179,800		19,592,806
Hilton Worldwide Holdings, Inc.		252,000		54,986,400
Lithia Motors, Inc.		24,230		6,116,864
Lululemon Athletica, Inc. (a)		64,200		19,176,540
Mattel, Inc. (a)		802,420		13,047,349
Mobileye Global, Inc. Class A (a) (b)		575,588		16,165,389
On Holding AG, Class A (a) (b)		245,135		9,511,238
Ross Stores, Inc.		474,928		69,016,537
Tractor Supply Co.		48,996		13,228,920
Ulta Beauty, Inc. (a)		82,203		31,719,672
Viking Holdings Ltd. (a)		371,580		12,611,425
Yum! Brands, Inc.		374,259		49,574,347
				615,375,302
Consumer Staples — 3.3%
Boston Beer Co., Inc. Class A (a)		32,100		9,792,105
Casey's General Stores, Inc.		107,000		40,826,920
Dollar General Corp.		178,304		23,577,138
Dollar Tree, Inc. (a)		448,200		47,854,314
McCormick & Co., Inc.		179,100		12,705,354
Reynolds Consumer Products, Inc.		507,100		14,188,658
TreeHouse Foods, Inc. (a)		389,900		14,285,936
				163,230,425

MassMutual Mid Cap Growth Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Energy — 4.4%
Cheniere Energy, Inc.		297,300	$	51,976,959
Chesapeake Energy Corp. (b)		217,200		17,851,668
Coterra Energy, Inc.		1,130,373		30,147,048
EQT Corp.		895,000		33,097,100
Permian Resources Corp. (b)		946,049		15,278,691
Range Resources Corp.		450,600		15,108,618
TechnipFMC PLC		1,502,434		39,288,649
Weatherford International PLC (a)		147,000		18,000,150
				220,748,883
Financials — 7.8%
Aon PLC Class A		34,532		10,137,905
Apollo Global Management, Inc.		316,263		37,341,172
Assurant, Inc.		255,000		42,393,750
Axis Capital Holdings Ltd.		192,700		13,614,255
Block, Inc. (a)		162,444		10,476,014
Carlyle Group, Inc.		250,450		10,055,568
Cboe Global Markets, Inc.		154,100		26,206,246
Corpay, Inc. (a)		102,200		27,227,102
Global Payments, Inc.		110,700		10,704,690
Intercontinental Exchange, Inc.		339,900		46,528,911
KKR & Co., Inc.		406,810		42,812,684
Markel Group, Inc. (a)		9,500		14,968,770
MarketAxess Holdings, Inc.		128,400		25,748,052
MSCI, Inc.		23,875		11,501,781
Nasdaq, Inc.		80,632		4,858,884
Raymond James Financial, Inc.		240,300		29,703,483
Toast, Inc., Class A (a) (b)		313,400		8,076,318
Tradeweb Markets, Inc. Class A		170,200		18,041,200
				390,396,785
Health Care — 21.9%
Acadia Healthcare Co., Inc. (a)		485,200		32,770,408
Agilent Technologies, Inc.		703,815		91,235,539
Alcon, Inc. (b)		571,468		50,906,369
Align Technology, Inc. (a)		96,924		23,400,361
Alnylam Pharmaceuticals, Inc. (a)		242,721		58,981,203
Apellis Pharmaceuticals, Inc. (a) (b)		173,400		6,651,624
Argenx SE ADR (a)		57,600		24,770,304
Avantor, Inc. (a)		2,780,396		58,944,395
Biogen, Inc. (a)		166,500		38,598,030
BioMarin Pharmaceutical, Inc. (a)		70,832		5,831,599
Bruker Corp.		701,147		44,740,190
The Cooper Cos., Inc.		433,500		37,844,550
CRISPR Therapeutics AG (a) (b)		126,814		6,849,224
Cytokinetics, Inc. (a)		231,264		12,529,884
DENTSPLY SIRONA, Inc.		548,500		13,663,135
Dexcom, Inc. (a)		201,543		22,850,945
Enovis Corp. (a)		412,200		18,631,440
Exact Sciences Corp. (a)		304,067		12,846,831
GE HealthCare Technologies, Inc. (a)		52,405		4,083,398
Hologic, Inc. (a)		1,555,025		115,460,606
Humana, Inc.		33,842		12,645,063
IDEXX Laboratories, Inc. (a)		41,449		20,193,953
Insmed, Inc. (a)		32,915		2,205,305

MassMutual Mid Cap Growth Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Inspire Medical Systems, Inc. (a) (b)		107,075	$	14,329,847
Ionis Pharmaceuticals, Inc. (a)		602,600		28,719,916
Mettler-Toledo International, Inc. (a)		26,371		36,855,846
Molina Healthcare, Inc. (a)		99,400		29,551,620
Natera, Inc. (a)		221,656		24,003,128
Quidelortho Corp. (a)		421,900		14,015,518
ResMed, Inc.		43,349		8,297,866
Sarepta Therapeutics, Inc. (a) (b)		115,869		18,307,302
Steris PLC		67,036		14,717,083
Teleflex, Inc.		390,426		82,118,301
Vaxcyte, Inc. (a)		101,571		7,669,626
Veeva Systems, Inc. Class A (a)		421,007		77,048,491
West Pharmaceutical Services, Inc.		64,100		21,113,899
				1,093,382,799
Industrials — 16.2%
Beacon Roofing Supply, Inc. (a)		185,876		16,821,778
Broadridge Financial Solutions, Inc.		165,700		32,642,900
Builders FirstSource, Inc. (a)		122,678		16,979,862
BWX Technologies, Inc.		340,498		32,347,310
Cintas Corp.		14,505		10,157,271
Equifax, Inc.		282,802		68,568,173
Esab Corp.		396,800		37,469,824
Ferguson PLC		92,900		17,990,085
Fortive Corp.		573,800		42,518,580
FTAI Aviation Ltd. (b)		299,051		30,871,035
Howmet Aerospace, Inc.		76,400		5,930,932
IDEX Corp.		105,100		21,146,120
Ingersoll Rand, Inc.		627,800		57,029,352
JB Hunt Transport Services, Inc.		374,874		59,979,840
KBR, Inc.		285,214		18,293,626
Knight-Swift Transportation Holdings, Inc.		133,132		6,645,949
L3Harris Technologies, Inc.		88,778		19,937,763
MasTec, Inc. (a)		42,655		4,563,658
Paylocity Holding Corp. (a)		221,325		29,181,701
Quanta Services, Inc.		113,561		28,854,715
Shoals Technologies Group, Inc. Class A (a)		314,300		1,961,232
Southwest Airlines Co. (b)		479,000		13,704,190
Stanley Black & Decker, Inc.		69,774		5,574,245
Textron, Inc.		824,800		70,817,328
TransUnion		343,686		25,487,754
UL Solutions, Inc. Class A		115,798		4,885,518
United Rentals, Inc.		44,700		28,908,831
Veralto Corp.		253,100		24,163,457
Verisk Analytics, Inc.		89,400		24,097,770
Waste Connections, Inc.		148,410		26,025,178
XPO, Inc. (a)		212,502		22,557,087
				806,113,064
Information Technology — 19.5%
Amphenol Corp. Class A		595,392		40,111,559
Arista Networks, Inc. (a)		61,744		21,640,037
Atlassian Corp. Class A (a)		121,600		21,508,608
Bill Holdings, Inc. (a)		91,618		4,820,939
CCC Intelligent Solutions Holdings, Inc. (a)		2,863,220		31,810,374
Cognex Corp.		388,608		18,171,310
Cognizant Technology Solutions Corp. Class A		238,696		16,231,328

MassMutual Mid Cap Growth Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Crowdstrike Holdings, Inc. Class A (a)		140,862	$	53,976,910
Datadog, Inc. Class A (a)		83,858		10,875,544
Elastic NV (a)		30,042		3,422,084
EPAM Systems, Inc. (a)		76,502		14,390,791
Fair Isaac Corp. (a)		53,259		79,284,543
Fortinet, Inc. (a)		586,565		35,352,273
Gartner, Inc. (a)		14,919		6,699,526
Guidewire Software, Inc. (a)		122,901		16,946,819
HubSpot, Inc. (a)		24,274		14,316,563
Keysight Technologies, Inc. (a)		251,000		34,324,250
KLA Corp.		13,247		10,922,284
Lattice Semiconductor Corp. (a) (b)		773,499		44,855,207
Littelfuse, Inc.		25,600		6,543,104
Marvell Technology, Inc.		1,757,161		122,825,554
Microchip Technology, Inc.		1,144,400		104,712,600
MongoDB, Inc. (a)		59,515		14,876,369
Monolithic Power Systems, Inc.		31,068		25,527,954
NXP Semiconductors NV		86,000		23,141,740
Palantir Technologies, Inc. Class A (a)		762,904		19,324,358
Palo Alto Networks, Inc. (a)		21,383		7,249,051
PTC, Inc. (a)		343,256		62,359,318
Pure Storage, Inc. Class A (a)		287,600		18,466,796
Roper Technologies, Inc.		29,700		16,740,702
Twilio, Inc. Class A (a)		78,090		4,436,293
Tyler Technologies, Inc. (a)		94,700		47,613,266
Zoom Video Communications, Inc. Class A (a)		297,300		17,597,187
				971,075,241
Materials — 5.1%
ATI, Inc. (a)		288,510		15,997,880
Avery Dennison Corp.		252,000		55,099,800
Ball Corp.		1,077,000		64,641,540
Eagle Materials, Inc.		80,594		17,525,971
Martin Marietta Materials, Inc.		101,200		54,830,160
RPM International, Inc.		153,400		16,518,112
Sealed Air Corp.		595,500		20,717,445
Summit Materials, Inc. Class A (a)		210,294		7,698,863
				253,029,771
Real Estate — 0.8%
CoStar Group, Inc. (a)		431,596		31,998,527
First Industrial Realty Trust, Inc.		132,590		6,299,351
				38,297,878
TOTAL COMMON STOCK (Cost $3,837,541,878)				4,807,328,351
PREFERRED STOCK — 0.3%
Consumer Discretionary — 0.0%
Nuro, Inc., Series D, (Acquired 10/29/21, Cost $3,125,295)
(a) (c) (d) (e)		149,925		613,193
Health Care — 0.0%
Caris Life Sciences, Inc., Series D, (Acquired 5/11/21, Cost $5,006,003)
(a) (c) (d) (e)		618,025		2,249,611

MassMutual Mid Cap Growth Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Industrials — 0.1%
Sila Nanotechnologies, Inc., Series F, (Acquired 1/07/21, Cost $7,310,569) (a) (c) (d) (e)		177,128	$	3,463,525
Information Technology — 0.1%
Databricks, Inc., Series H, (Acquired 8/31/21, Cost $3,472,860) (a) (c) (d) (e)		47,260		3,473,610
Materials — 0.1%
Redwood Materials, Inc., Series C, (Acquired 5/28/21, Cost $3,678,889) (a) (c) (d) (e)		77,608		3,998,364
TOTAL PREFERRED STOCK (Cost $22,593,614)				13,798,303
TOTAL EQUITIES (Cost $3,860,135,492)				4,821,126,654
TOTAL LONG-TERM INVESTMENTS (Cost $3,860,135,492)				4,821,126,654
SHORT-TERM INVESTMENTS — 3.3%
Investment of Cash Collateral from Securities Loaned — 0.2%
State Street Navigator Securities Lending Government Money Market Portfolio (f)		11,609,030		11,609,030
Mutual Fund — 0.0%
T. Rowe Price Treasury Reserve Fund		361		361
	Principal Amount
Repurchase Agreement — 3.1%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/28/24, 1.600%, due 7/01/24 (g)	$	156,806,774		156,806,774
TOTAL SHORT-TERM INVESTMENTS (Cost $168,416,165)				168,416,165
TOTAL INVESTMENTS — 100.0% (Cost $4,028,551,657) (h)				4,989,542,819
Other Assets/(Liabilities) — (0.0)%				(1,377,978)
NET ASSETS — 100.0%			$	4,988,164,841

Abbreviation Legend

ADR American Depositary Receipt

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Non-income producing security.

(b) Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2024, was $155,264,941 or 3.11% of net assets. The Fund received $148,410,887 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 June 30, 2024, these securities amounted to a value of $13,798,303 or 0.28% of net assets.

(d) Investment is valued using significant unobservable inputs.

(e) Restricted security. Certain securities are restricted to resale. At June 30, 2024, these securities amounted to a value of $13,798,303 or 0.28% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

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

(g) Maturity value of $156,827,681. Collateralized by U.S. Government Agency obligations with a rate of 4.500%, maturity date of 3/31/26, and an aggregate market value, including accrued interest, of $159,943,113.

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

MassMutual Small Cap Growth Equity Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.0%
COMMON STOCK — 98.0%
Communication Services — 2.1%
Cargurus, Inc. (a)		153,497	$	4,021,621
Cinemark Holdings, Inc. (a)		105,533		2,281,624
Criteo SA Sponsored ADR (a)		64,921		2,448,820
Eventbrite, Inc. Class A (a)		308,351		1,492,419
Ibotta, Inc. Class A (a)		8,136		611,502
New York Times Co. Class A		51,840		2,654,726
Ziff Davis, Inc. (a)		31,528		1,735,616
				15,246,328
Consumer Discretionary — 11.5%
Abercrombie & Fitch Co. Class A (a)		16,013		2,847,752
Acushnet Holdings Corp.		22,774		1,445,694
American Eagle Outfitters, Inc.		86,713		1,730,791
Boot Barn Holdings, Inc. (a)		31,494		4,060,521
Carter's, Inc.		21,163		1,311,471
Cava Group, Inc. (a)		21,085		1,955,634
Century Communities, Inc.		23,269		1,900,147
Crocs, Inc. (a)		14,850		2,167,209
Duolingo, Inc. (a) (b)		31,681		6,610,874
European Wax Center, Inc. Class A (a) (b)		122,474		1,216,167
Genius Sports Ltd. (a) (b)		273,422		1,490,150
Global-e Online Ltd. (a) (b)		50,846		1,844,184
Goodyear Tire & Rubber Co. (a)		160,949		1,826,771
H&R Block, Inc.		55,858		3,029,179
Modine Manufacturing Co. (a)		65,794		6,591,901
Ollie's Bargain Outlet Holdings, Inc. (a)		37,630		3,694,137
Patrick Industries, Inc. (b)		14,757		1,601,872
Red Rock Resorts, Inc. Class A		34,152		1,875,969
Shake Shack, Inc. Class A (a)		42,655		3,838,950
Skyline Champion Corp. (a)		74,999		5,081,182
Steven Madden Ltd.		48,314		2,043,682
Sweetgreen, Inc. Class A (a)		53,628		1,616,348
Taylor Morrison Home Corp. (a)		50,849		2,819,069
Texas Roadhouse, Inc.		26,636		4,573,668
TopBuild Corp. (a)		8,001		3,082,545
Visteon Corp. (a)		15,138		1,615,225
Wingstop, Inc.		22,762		9,620,587
YETI Holdings, Inc. (a)		80,370		3,066,116
				84,557,795
Consumer Staples — 3.3%
BellRing Brands, Inc. (a)		82,306		4,702,965
elf Beauty, Inc. (a)		54,507		11,485,715
Freshpet, Inc. (a)		44,785		5,794,731

MassMutual Small Cap Growth Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Simply Good Foods Co. (a)		55,619	$	2,009,515
				23,992,926
Energy — 5.6%
Cactus, Inc. Class A		63,765		3,362,966
Chord Energy Corp.		27,420		4,597,786
Gulfport Energy Corp. (a)		16,554		2,499,654
Magnolia Oil & Gas Corp. Class A (b)		93,091		2,358,926
Matador Resources Co.		39,918		2,379,113
Northern Oil & Gas, Inc.		62,099		2,308,220
Seadrill Ltd. (a)		88,806		4,573,509
Sitio Royalties Corp. Class A (b)		86,385		2,039,550
TechnipFMC PLC		146,737		3,837,172
Tidewater, Inc. (a)		21,267		2,024,831
Viper Energy, Inc.		191,232		7,176,937
Weatherford International PLC (a)		32,300		3,955,135
				41,113,799
Financials — 8.4%
Ameris Bancorp		48,896		2,461,914
Assured Guaranty Ltd.		29,870		2,304,471
Banner Corp.		34,401		1,707,666
Cadence Bank		166,114		4,697,704
Cohen & Steers, Inc. (b)		9,795		710,725
Essent Group Ltd.		26,781		1,504,824
Evercore, Inc. Class A		27,966		5,828,953
Hamilton Lane, Inc. Class A		55,074		6,806,045
Hancock Whitney Corp.		52,717		2,521,454
Hannon Armstrong Sustainable Infrastructure Capital, Inc. (b)		165,757		4,906,407
Kemper Corp.		26,894		1,595,621
Kinsale Capital Group, Inc.		4,011		1,545,358
MGIC Investment Corp.		78,218		1,685,598
Mr Cooper Group, Inc. (a)		39,199		3,184,135
National Bank Holdings Corp. Class A		67,426		2,632,985
PJT Partners, Inc. Class A (b)		42,473		4,583,261
PRA Group, Inc. (a)		95,423		1,876,016
Seacoast Banking Corp. of Florida		89,804		2,122,967
Selective Insurance Group, Inc.		16,495		1,547,726
SiriusPoint Ltd. (a)		195,415		2,384,063
StepStone Group, Inc. Class A		73,672		3,380,808
UMB Financial Corp.		24,169		2,016,178
				62,004,879
Health Care — 19.5%
Acadia Healthcare Co., Inc. (a)		79,227		5,350,992
Akero Therapeutics, Inc. (a)		70,565		1,655,455
Apellis Pharmaceuticals, Inc. (a) (b)		36,067		1,383,530
Apogee Therapeutics, Inc. (a)		22,285		876,915
Arcturus Therapeutics Holdings, Inc. (a) (b)		21,474		522,892
Avidity Biosciences, Inc. (a)		48,610		1,985,718
Axsome Therapeutics, Inc. (a) (b)		11,774		947,807
Blueprint Medicines Corp. (a)		40,262		4,339,438
BrightSpring Health Services, Inc. (a)		71,315		810,138
Celldex Therapeutics, Inc. (a)		41,279		1,527,736
Crinetics Pharmaceuticals, Inc. (a)		44,747		2,004,218
Cytokinetics, Inc. (a) (b)		59,962		3,248,741

MassMutual Small Cap Growth Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Disc Medicine, Inc. (a) (b)		39,869	$	1,796,896
Encompass Health Corp.		65,025		5,578,495
Evolent Health, Inc. Class A (a)		65,843		1,258,918
Geron Corp. (a) (b)		205,729		872,291
Glaukos Corp. (a)		46,356		5,486,233
Globus Medical, Inc. Class A (a)		36,445		2,496,118
Haemonetics Corp. (a)		61,850		5,116,850
Halozyme Therapeutics, Inc. (a)		42,400		2,220,064
HealthEquity, Inc. (a)		74,099		6,387,334
Hims & Hers Health, Inc. (a)		89,977		1,816,636
Immatics NV (a)		160,338		1,863,128
Immunocore Holdings PLC ADR (a)		14,925		505,808
Inari Medical, Inc. (a)		36,625		1,763,494
Insmed, Inc. (a)		36,397		2,438,599
Inspire Medical Systems, Inc. (a) (b)		22,978		3,075,146
Integer Holdings Corp. (a) (b)		21,045		2,436,801
Intellia Therapeutics, Inc. (a)		20,875		467,182
Intra-Cellular Therapies, Inc. (a)		57,129		3,912,765
iRhythm Technologies, Inc. (a) (b)		6,186		665,861
Krystal Biotech, Inc. (a)		6,918		1,270,421
Kymera Therapeutics, Inc. (a) (b)		42,834		1,278,595
Lantheus Holdings, Inc. (a)		12,845		1,031,325
Longboard Pharmaceuticals, Inc. (a)		30,595		826,983
Medpace Holdings, Inc. (a)		19,478		8,022,014
Merit Medical Systems, Inc. (a)		30,774		2,645,025
Merus NV (a)		51,321		3,036,664
Morphic Holding, Inc. (a) (b)		30,652		1,044,314
Myriad Genetics, Inc. (a)		96,480		2,359,901
Nurix Therapeutics, Inc. (a)		80,391		1,677,760
PROCEPT BioRobotics Corp. (a) (b)		96,189		5,876,186
Prothena Corp. PLC (a)		13,859		286,050
PTC Therapeutics, Inc. (a)		25,842		790,248
RadNet, Inc. (a)		52,064		3,067,611
Repligen Corp. (a)		16,599		2,092,470
REVOLUTION Medicines, Inc. (a)		87,643		3,401,425
Rocket Pharmaceuticals, Inc. (a) (b)		104,974		2,260,090
RxSight, Inc. (a)		43,165		2,597,238
Savara, Inc. (a)		97,118		391,386
Select Medical Holdings Corp.		38,700		1,356,822
SpringWorks Therapeutics, Inc. (a)		19,274		726,052
Spyre Therapeutics, Inc. (a)		12,636		297,072
Structure Therapeutics, Inc. ADR (a)		34,372		1,349,788
Surgery Partners, Inc. (a) (b)		119,080		2,832,913
Syndax Pharmaceuticals, Inc. (a)		56,483		1,159,596
TransMedics Group, Inc. (a)		36,051		5,430,002
Twist Bioscience Corp. (a)		46,985		2,315,421
Ultragenyx Pharmaceutical, Inc. (a)		16,237		667,341
Vaxcyte, Inc. (a)		47,512		3,587,631
Veracyte, Inc. (a)		68,351		1,481,166
Vericel Corp. (a) (b)		30,449		1,397,000
Verona Pharma PLC ADR (a) (b)		40,926		591,790
Viking Therapeutics, Inc. (a)		9,499		503,542
Xenon Pharmaceuticals, Inc. (a)		20,967		817,503
				143,281,544
Industrials — 21.9%
AAON, Inc.		40,471		3,530,690
Acuity Brands, Inc.		8,711		2,103,184

MassMutual Small Cap Growth Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
AeroVironment, Inc. (a)		6,248	$	1,138,136
Air Lease Corp.		63,992		3,041,540
Ameresco, Inc. Class A (a) (b)		48,676		1,402,356
Applied Industrial Technologies, Inc.		44,397		8,613,018
Aris Water Solutions, Inc. Class A		72,944		1,143,032
Atmus Filtration Technologies, Inc. (a)		36,456		1,049,204
AZEK Co., Inc. (a)		220,030		9,269,864
Boise Cascade Co.		18,683		2,227,387
Casella Waste Systems, Inc. Class A (a)		71,268		7,071,211
Clean Harbors, Inc. (a)		34,592		7,822,981
Comfort Systems USA, Inc.		36,675		11,153,601
Crane Co.		28,277		4,099,599
Curtiss-Wright Corp.		33,873		9,178,905
EMCOR Group, Inc.		13,146		4,799,342
Enpro, Inc.		15,450		2,249,056
Esab Corp.		25,258		2,385,113
Exlservice Holdings, Inc. (a)		124,401		3,901,215
Federal Signal Corp.		34,300		2,869,881
Flowserve Corp.		53,888		2,592,013
Fluor Corp. (a)		201,592		8,779,332
GATX Corp.		15,663		2,073,155
H&E Equipment Services, Inc.		24,701		1,091,043
Helios Technologies, Inc.		38,518		1,839,234
Herc Holdings, Inc.		7,296		972,484
Kennametal, Inc. (b)		56,148		1,321,724
Kirby Corp. (a)		46,357		5,550,324
Leonardo DRS, Inc. (a)		93,639		2,388,731
Loar Holdings, Inc. (a)		11,327		604,975
ManpowerGroup, Inc.		22,786		1,590,463
McGrath RentCorp		17,560		1,871,018
Middleby Corp. (a)		13,492		1,654,254
NEXTracker, Inc. Class A (a)		37,560		1,760,813
Parsons Corp. (a)		52,226		4,272,609
Rush Enterprises, Inc. Class A		115,419		4,832,593
RXO, Inc. (a) (b)		87,933		2,299,448
Ryder System, Inc.		18,480		2,289,302
Saia, Inc. (a) (b)		6,725		3,189,600
Shoals Technologies Group, Inc. Class A (a)		279,880		1,746,451
SPX Technologies, Inc. (a)		32,171		4,572,786
TriNet Group, Inc.		27,348		2,734,800
Verra Mobility Corp. (a)		231,639		6,300,581
Zurn Elkay Water Solutions Corp. Class C		177,239		5,210,827
				160,587,875
Information Technology — 18.2%
Allegro MicroSystems, Inc. (a)		110,917		3,132,296
Altair Engineering, Inc. Class A (a)		39,637		3,887,597
Appfolio, Inc. Class A (a)		12,166		2,975,439
Astera Labs, Inc. (a)		14,184		858,274
Belden, Inc.		23,008		2,158,150
Calix, Inc. (a)		25,390		899,568
Celestica, Inc. (a) (b)		65,464		3,753,051
Cirrus Logic, Inc. (a)		17,325		2,211,709
Clearwater Analytics Holdings, Inc. Class A (a)		116,813		2,163,377
Coherent Corp. (a) (b)		59,684		4,324,703
Confluent, Inc. Class A (a)		58,920		1,739,908
Crane NXT Co. (b)		37,193		2,284,394
CyberArk Software Ltd. (a)		32,528		8,893,806

MassMutual Small Cap Growth Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
DoubleVerify Holdings, Inc. (a)		97,265	$	1,893,749
ePlus, Inc. (a)		18,362		1,352,912
Fabrinet (a)		18,591		4,550,891
Five9, Inc. (a)		35,382		1,560,346
FormFactor, Inc. (a)		82,066		4,967,455
Guidewire Software, Inc. (a)		32,409		4,468,877
Impinj, Inc. (a) (b)		20,281		3,179,452
Informatica, Inc. Class A (a)		65,217		2,013,901
Intapp, Inc. (a) (b)		32,270		1,183,341
Itron, Inc. (a)		22,683		2,244,710
Jamf Holding Corp. (a)		233,676		3,855,654
JFrog Ltd. (a)		99,065		3,719,891
MACOM Technology Solutions Holdings, Inc. (a)		41,348		4,609,061
Manhattan Associates, Inc. (a)		9,853		2,430,538
MKS Instruments, Inc.		16,272		2,124,798
Nova Ltd. (a) (b)		24,883		5,835,810
Novanta, Inc. (a)		35,096		5,724,508
Onto Innovation, Inc. (a)		25,637		5,628,860
Perficient, Inc. (a)		20,629		1,542,843
Power Integrations, Inc.		23,844		1,673,610
PowerSchool Holdings, Inc. Class A (a)		151,410		3,390,070
Q2 Holdings, Inc. (a)		39,854		2,404,392
Rambus, Inc. (a)		27,785		1,632,647
SiTime Corp. (a)		19,221		2,390,708
Sprout Social, Inc. Class A (a) (b)		82,047		2,927,437
SPS Commerce, Inc. (a)		15,531		2,922,313
Squarespace, Inc. Class A (a)		113,920		4,970,330
Synaptics, Inc. (a)		20,440		1,802,808
Universal Display Corp.		6,249		1,313,852
Varonis Systems, Inc. (a)		63,644		3,053,003
Viavi Solutions, Inc. (a)		188,981		1,298,299
Vontier Corp.		35,827		1,368,591
				133,317,929
Materials — 4.0%
Arcadium Lithium PLC (a) (b)		493,585		1,658,446
ATI, Inc. (a) (b)		71,392		3,958,686
Cabot Corp.		88,392		8,122,341
Carpenter Technology Corp.		41,588		4,557,213
Eagle Materials, Inc.		10,464		2,275,501
Element Solutions, Inc.		115,840		3,141,581
Graphic Packaging Holding Co. (b)		89,118		2,335,783
Hudbay Minerals, Inc.		118,089		1,068,705
Methanex Corp.		51,450		2,482,977
				29,601,233
Real Estate — 2.9%
Acadia Realty Trust		50,600		906,752
American Healthcare REIT, Inc.		135,097		1,973,767
Douglas Emmett, Inc. (b)		116,983		1,557,044
Essential Properties Realty Trust, Inc.		71,992		1,994,898
Independence Realty Trust, Inc.		91,108		1,707,364
Phillips Edison & Co., Inc.		134,142		4,387,785
PotlatchDeltic Corp.		12,403		488,554
Ryman Hospitality Properties, Inc.		34,404		3,435,584
Terreno Realty Corp.		57,263		3,388,824

MassMutual Small Cap Growth Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Xenia Hotels & Resorts, Inc.		110,125	$	1,578,091
				21,418,663
Utilities — 0.6%
IDACORP, Inc.		21,135		1,968,725
ONE Gas, Inc.		32,444		2,071,550
				4,040,275
TOTAL COMMON STOCK (Cost $595,123,417)				719,163,246
TOTAL EQUITIES (Cost $595,123,417)				719,163,246
EXCHANGE-TRADED FUNDS — 0.4%
iShares Russell 2000 ETF (b)		15,597		3,164,475
TOTAL EXCHANGE-TRADED FUNDS (Cost $3,163,710)				3,164,475
TOTAL LONG-TERM INVESTMENTS (Cost $598,287,127)				722,327,721
SHORT-TERM INVESTMENTS — 1.9%
Investment of Cash Collateral from Securities Loaned — 0.3%
State Street Navigator Securities Lending Government Money Market Portfolio (c)		2,047,705		2,047,705
	Principal Amount
Repurchase Agreement — 1.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/28/24, 1.600%, due 7/01/24 (d)	$	11,862,393		11,862,393
TOTAL SHORT-TERM INVESTMENTS (Cost $13,910,098)				13,910,098
TOTAL INVESTMENTS — 100.3% (Cost $612,197,225) (e)				736,237,819
Other Assets/(Liabilities) — (0.3)%				(2,434,813)
NET ASSETS — 100.0%			$	733,803,006

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 June 30, 2024, was $74,073,348 or 10.09% of net assets. The Fund received $73,936,001 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 $11,863,975. Collateralized by U.S. Government Agency obligations with a rate of 4.500%, maturity date of 3/31/26, and an aggregate market value, including accrued interest, of $12,099,912.

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

MassMutual Overseas Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.8%
COMMON STOCK — 98.3%
Australia — 1.4%
Brambles Ltd.		114,600	$	1,113,340
Glencore PLC		531,200		3,028,786
Rio Tinto PLC		38,598		2,540,740
				6,682,866
Belgium — 1.1%
Anheuser-Busch InBev SA		30,500		1,761,874
KBC Group NV		27,813		1,961,888
Liberty Global Ltd. Class A (a)		80,274		1,399,176
				5,122,938
Canada — 3.1%
Canadian National Railway Co.		34,098		4,027,997
Intact Financial Corp.		14,040		2,340,017
Open Text Corp.		83,690		2,513,055
Suncor Energy, Inc. (SU CN)		76,800		2,927,613
Toronto-Dominion Bank		52,221		2,870,523
				14,679,205
China — 3.0%
Alibaba Group Holding Ltd.		310,540		2,791,782
NetEase, Inc.		116,200		2,218,514
Prosus NV (PRX NA)		114,099		4,041,982
Tencent Holdings Ltd.		85,800		4,072,152
Yum China Holdings, Inc.		30,324		935,192
				14,059,622
Denmark — 3.2%
Carlsberg AS Class B		30,036		3,594,569
DSV AS		17,615		2,695,545
Novo Nordisk AS Class B		64,159		9,165,509
				15,455,623
France — 15.1%
Accor SA		55,870		2,303,483
Air Liquide SA		51,162		8,808,155
Airbus SE		12,900		1,778,725
BNP Paribas SA		84,531		5,416,744
Capgemini SE		43,994		8,713,955
Cie de Saint-Gobain SA		55,497		4,297,745
Cie Generale des Etablissements Michelin SCA Class A		81,705		3,152,582
Danone SA		32,900		2,007,890
Dassault Systemes SE		39,853		1,500,243

MassMutual Overseas Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Edenred SE		115,661	$	4,880,215
Engie SA		250,524		3,568,204
EssilorLuxottica SA		25,003		5,364,846
Kering SA		12,790		4,649,660
Legrand SA		28,300		2,820,187
LVMH Moet Hennessy Louis Vuitton SE		8,776		6,739,541
Pernod Ricard SA		23,405		3,185,122
Publicis Groupe SA		7,969		844,662
Valeo SE		33,082		353,857
Worldline SA (a) (b)		132,300		1,433,004
				71,818,820
Germany — 14.1%
adidas AG		7,495		1,788,777
Allianz SE Registered		11,640		3,234,109
Bayer AG Registered		189,825		5,368,054
Bayerische Motoren Werke AG		37,785		3,574,907
Beiersdorf AG		39,992		5,842,928
Brenntag SE		26,700		1,799,238
Continental AG		68,299		3,868,376
Daimler Truck Holding AG		61,161		2,433,267
Deutsche Boerse AG		29,728		6,076,833
Fresenius Medical Care AG		100,921		3,859,498
Fresenius SE & Co. KGaA (a)		124,200		3,709,674
Henkel AG & Co. KGaA		16,722		1,315,945
Mercedes Benz Group AG		60,673		4,192,741
Merck KGaA		30,971		5,132,046
MTU Aero Engines AG		7,744		1,979,961
SAP SE		48,624		9,872,371
Siemens AG Registered		12,340		2,295,106
thyssenkrupp AG		172,517		747,061
				67,090,892
Hong Kong — 2.2%
AIA Group Ltd.		619,800		4,202,833
Prudential PLC		694,150		6,297,265
				10,500,098
India — 1.5%
Axis Bank Ltd.		75,405		1,141,272
HDFC Bank Ltd.		222,604		4,499,928
Tata Consultancy Services Ltd.		29,530		1,379,265
				7,020,465
Indonesia — 0.2%
Bank Mandiri Persero Tbk. PT		2,231,300		833,253
Ireland — 0.7%
AIB Group PLC		478,363		2,520,302
Smurfit Kappa Group PLC		23,100		1,026,962
				3,547,264
Israel — 0.6%
Check Point Software Technologies Ltd. (a)		18,478		3,048,870

MassMutual Overseas Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Italy — 4.0%
Eni SpA		237,215	$	3,653,151
Intesa Sanpaolo SpA		2,303,290		8,600,296
Ryanair Holdings PLC Sponsored ADR		57,478		6,692,739
				18,946,186
Japan — 11.2%
Daikin Industries Ltd.		24,900		3,439,747
Denso Corp.		266,000		4,151,473
Fujitsu Ltd.		140,700		2,210,661
Hitachi Ltd.		420,700		9,483,195
Hoya Corp.		16,800		1,965,729
Komatsu Ltd.		49,000		1,425,996
Kose Corp. (c)		32,100		2,043,635
Kubota Corp.		78,300		1,100,152
Kyocera Corp.		241,300		2,774,423
Mitsubishi Electric Corp.		212,800		3,401,791
Olympus Corp.		197,800		3,182,188
Seven & i Holdings Co. Ltd.		229,500		2,795,194
Shin-Etsu Chemical Co. Ltd.		95,500		3,714,585
SMC Corp.		5,600		2,673,679
Sony Group Corp.		48,500		4,121,140
Terumo Corp.		170,700		2,834,001
ZOZO, Inc.		77,400		1,941,754
				53,259,343
Luxembourg — 0.4%
Eurofins Scientific SE (c)		39,200		1,948,896
Netherlands — 3.1%
Akzo Nobel NV		87,111		5,296,534
EXOR NV		22,100		2,303,297
ING Groep NV Series N		326,322		5,591,424
Koninklijke Ahold Delhaize NV		44,800		1,322,299
				14,513,554
Portugal — 0.6%
Galp Energia SGPS SA		133,409		2,818,551
Republic of Korea — 1.3%
NAVER Corp.		21,790		2,640,070
Samsung Electronics Co. Ltd.		56,993		3,349,239
				5,989,309
Singapore — 0.9%
DBS Group Holdings Ltd.		157,150		4,141,009
Spain — 1.1%
Amadeus IT Group SA		80,755		5,373,895
Sweden — 1.0%
Sandvik AB		59,800		1,202,080
SKF AB Class B		93,500		1,865,683
Volvo AB Class B		61,900		1,587,970
				4,655,733

MassMutual Overseas Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Switzerland — 7.7%
Cie Financiere Richemont SA Registered Class A		48,586	$	7,582,757
Julius Baer Group Ltd.		34,702		1,937,571
Novartis AG Registered		79,538		8,521,096
Schindler Holding AG		2,885		722,883
Sika AG Registered		8,416		2,395,717
Sonova Holding AG Registered		7,460		2,295,208
Swatch Group AG		9,790		2,005,832
UBS Group AG Registered		196,548		5,753,270
Zurich Insurance Group AG		9,748		5,186,036
				36,400,370
Taiwan — 1.2%
Taiwan Semiconductor Manufacturing Co. Ltd. Sponsored ADR		33,709		5,858,961
United Kingdom — 9.8%
Ashtead Group PLC		29,100		1,938,901
Bunzl PLC		8,600		326,227
Compass Group PLC		283,405		7,715,990
Diageo PLC		101,852		3,204,302
Informa PLC		24,100		260,912
Lloyds Banking Group PLC		7,436,797		5,152,287
London Stock Exchange Group PLC		35,555		4,214,577
Reckitt Benckiser Group PLC		46,000		2,482,350
RELX PLC		135,351		6,204,632
Rolls-Royce Holdings PLC (a)		747,321		4,319,819
Schroders PLC		639,564		2,944,705
Smith & Nephew PLC		128,600		1,589,867
Smiths Group PLC		46,856		1,010,739
Tesco PLC		711,733		2,755,459
WPP PLC		285,123		2,613,777
				46,734,544
United States — 9.8%
CNH Industrial NV		490,497		4,968,734
Experian PLC		133,349		6,183,900
Holcim AG		12,184		1,080,644
Linde PLC (LIN US)		9,207		4,040,124
Nestle SA Registered		79,510		8,116,185
Qiagen NV		60,979		2,517,738
Roche Holding AG		34,664		9,619,760
Schneider Electric SE		43,165		10,299,333
				46,826,418
TOTAL COMMON STOCK (Cost $400,457,262)				467,326,685
PREFERRED STOCK — 0.5%
Republic of Korea — 0.5%
Samsung Electronics Co. Ltd. 1.704%
		55,300		2,539,501

MassMutual Overseas Fund —  Portfolio of Investments (Continued)

			Value
TOTAL PREFERRED STOCK (Cost $2,892,768)			$	2,539,501
TOTAL EQUITIES (Cost $403,350,030)				469,866,186
TOTAL LONG-TERM INVESTMENTS (Cost $403,350,030)				469,866,186
SHORT-TERM INVESTMENTS — 1.0%
	Principal Amount
Repurchase Agreement — 1.0%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/28/24, 1.600%, due 7/01/24 (d)	$	4,649,272		4,649,272
TOTAL SHORT-TERM INVESTMENTS (Cost $4,649,272)				4,649,272
TOTAL INVESTMENTS — 99.8% (Cost $407,999,302) (e)				474,515,458
Other Assets/(Liabilities) — 0.2%				795,161
NET ASSETS — 100.0%			$	475,310,619

Abbreviation Legend

ADR American Depositary Receipt

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Non-income producing security.

(b) 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 June 30, 2024, the aggregate market value of these securities amounted to $1,433,004 or 0.30% of net assets.

(c) Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2024, was $3,865,291 or 0.81% of net assets. The Fund received $4,106,090 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).

(d) Maturity value of $4,649,892. Collateralized by U.S. Government Agency obligations with a rate of 4.500%, maturity date of 3/31/26, and an aggregate market value, including accrued interest, of $4,742,375.

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

MassMutual Select T. Rowe Price International Equity Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.3%
COMMON STOCK — 98.8%
Argentina — 0.0%
Grupo Financiero Galicia SA ADR (a)		12,981	$	396,699
Australia — 1.9%
ANZ Group Holdings Ltd.		90,497		1,704,086
BHP Group Ltd.		138,548		3,968,903
BHP Group Ltd. Class DI Class DI		176,643		5,058,744
Challenger Ltd.		143,336		669,640
Downer EDI Ltd.		561,934		1,731,089
IGO Ltd. (a)		211,470		795,108
Macquarie Group Ltd.		15,229		2,077,216
Pilbara Minerals Ltd. (a)		594,422		1,217,006
Scentre Group		1,001,733		2,085,713
South32 Ltd.		1,510,762		3,686,869
Worley Ltd.		296,019		2,946,810
				25,941,184
Austria — 0.6%
BAWAG Group AG (b)		63,956		4,036,105
Erste Group Bank AG		46,351		2,195,233
OMV AG		44,199		1,922,264
				8,153,602
Belgium — 0.2%
KBC Group NV		25,915		1,828,006
Umicore SA (a)		51,600		774,218
				2,602,224
Brazil — 2.1%
Arcos Dorados Holdings, Inc. Class A		44,273		398,457
B3 SA - Brasil Bolsa Balcao		1,989,275		3,643,973
Banco BTG Pactual SA		384,800		2,127,720
Embraer SA (c)		367,700		2,377,839
Hypera SA		95,966		492,697
Itau Unibanco Holding SA Sponsored ADR		184,500		1,077,480
Klabin SA		545,531		2,092,303
Localiza Rent a Car SA		210,166		1,579,037
MercadoLibre, Inc. (c)		3,966		6,517,724
Multiplan Empreendimentos Imobiliarios SA		628,359		2,533,624
Petroleo Brasileiro SA Sponsored ADR		64,791		938,822
Raia Drogasil SA		547,620		2,515,676
Vale SA Sponsored ADR		74,742		834,868

MassMutual Select T. Rowe Price International Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
WEG SA		191,940	$	1,448,623
				28,578,843
Canada — 4.3%
Brookfield Corp.		55,046		2,289,476
Canadian National Railway Co.		38,864		4,591,004
Canadian Pacific Kansas City Ltd. (a)		34,865		2,744,921
Cenovus Energy, Inc.		197,063		3,873,414
Constellation Software, Inc.		1,686		4,858,017
Definity Financial Corp.		109,258		3,592,285
Descartes Systems Group, Inc. (c)		18,746		1,815,363
Element Fleet Management Corp. (a)		411,258		7,482,337
Magna International, Inc.		61,182		2,563,526
National Bank of Canada		90,881		7,208,433
Shopify, Inc. Class A (c)		47,073		3,109,172
Sun Life Financial, Inc.		102,629		5,032,238
Suncor Energy, Inc. (SU CN)		125,456		4,782,377
Suncor Energy, Inc. (SU US)		1,771		67,475
TMX Group Ltd.		168,454		4,688,957
				58,698,995
Chile — 0.4%
Antofagasta PLC		108,908		2,887,899
Banco de Chile		19,236,927		2,188,314
				5,076,213
China — 7.9%
Alibaba Group Holding Ltd.		469,200		4,218,149
Alibaba Group Holding Ltd. Sponsored ADR		96,123		6,920,856
Baidu, Inc. Class A (c)		165,100		1,786,647
Baidu, Inc. Sponsored ADR (a) (c)		14,024		1,212,796
Bank of Ningbo Co. Ltd. Class A		598,600		1,817,726
BeiGene Ltd. ADR (c)		14,371		2,050,311
Beijing Enterprises Holdings Ltd.		96,000		322,189
Budweiser Brewing Co. APAC Ltd. (b)		373,900		440,171
China Oilfield Services Ltd. Class A		949,900		2,249,988
China Pacific Insurance Group Co. Ltd. Class A (c)		249,100		952,840
China Resources Gas Group Ltd.		390,900		1,369,796
China Resources Land Ltd.		487,000		1,654,136
Eastroc Beverage Group Co. Ltd. Class A		7,900		234,159
Fosun International Ltd.		993,000		534,088
Fuyao Glass Industry Group Co. Ltd. Class A		490,000		3,231,837
Hangcha Group Co. Ltd. Class A		177,240		479,420
JD Health International, Inc. (b) (c)		169,300		460,152
Jiumaojiu International Holdings Ltd. (b)		401,000		207,282
KE Holdings, Inc. ADR		463,097		6,552,823
Kuaishou Technology (b) (c)		239,000		1,411,154
Kweichow Moutai Co. Ltd. Class A		9,298		1,875,239
Meituan Class B (b) (c)		96,100		1,361,534
NARI Technology Co. Ltd. Class A		567,521		1,948,192
NetEase, Inc. ADR		10,991		1,050,520
New Oriental Education & Technology Group, Inc. ADR (c)		12,878		1,001,007
Nongfu Spring Co. Ltd. Class H (b)		105,000		497,967
NXP Semiconductor NV		21,054		5,665,421
PDD Holdings, Inc. ADR (c)		25,503		3,390,624
Prosus NV (PRX NA)		278,917		9,880,696

MassMutual Select T. Rowe Price International Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Prosus NV (PRX SJ)		84,299	$	2,995,300
Sany Heavy Industry Co. Ltd. Class A		885,500		2,011,783
Shandong Pharmaceutical Glass Co. Ltd. Class A		282,000		983,518
Shenzhen Inovance Technology Co. Ltd. Class A		265,300		1,872,741
Shenzhen Mindray Bio-Medical Electronics Co. Ltd. Class A		16,700		669,426
Silergy Corp.		231,000		3,266,397
Tencent Holdings Ltd.		190,400		9,036,570
Tongcheng Travel Holdings Ltd. (b)		1,104,400		2,197,284
Trip.com Group Ltd. (c)		53,900		2,552,176
Tsingtao Brewery Co. Ltd. Class H		296,000		1,972,048
Wanhua Chemical Group Co. Ltd.		130,500		1,449,796
Weichai Power Co. Ltd. Class A		943,100		2,108,695
Wilmar International Ltd.		778,400		1,774,462
Yangzijiang Shipbuilding Holdings Ltd.		2,256,200		4,085,209
Yifeng Pharmacy Chain Co. Ltd. Class A		338,598		1,142,997
Yum China Holdings, Inc.		120,468		3,715,233
Zhongsheng Group Holdings Ltd.		305,000		445,608
ZTO Express Cayman, Inc. ADR		58,875		1,221,656
				108,278,619
Denmark — 1.4%
Coloplast AS Class B		2,559		307,326
Genmab AS (c)		8,925		2,238,202
Novo Nordisk AS Class B		53,562		7,651,662
Novo Nordisk AS Sponsored ADR		59,483		8,490,603
				18,687,793
Finland — 0.5%
Mandatum OYJ		59,639		266,798
Sampo OYJ Class A		128,064		5,497,936
Stora Enso OYJ Class R		117,313		1,604,207
				7,368,941
France — 6.6%
Air Liquide SA		19,529		3,362,153
Airbus SE		31,964		4,407,377
Alstom SA		88,809		1,490,471
AXA SA		359,948		11,852,128
BNP Paribas SA		96,968		6,213,707
Capgemini SE		16,004		3,169,935
Cie de Saint-Gobain SA		35,335		2,736,379
Dassault Aviation SA		25,064		4,541,852
Dassault Systemes SE		32,636		1,228,563
Engie SA		482,166		6,867,473
EssilorLuxottica SA		10,498		2,252,536
Forvia SE		70,844		843,777
Kering SA		4,434		1,611,930
L'Oreal SA		7,377		3,243,771
Legrand SA		30,172		3,006,738
LVMH Moet Hennessy Louis Vuitton SE		5,270		4,047,103
Safran SA		38,518		8,103,640
Sartorius Stedim Biotech		13,570		2,217,255
Teleperformance SE		9,256		970,876
Thales SA		17,929		2,880,909
TotalEnergies SE		219,337		14,618,609

MassMutual Select T. Rowe Price International Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Ubisoft Entertainment SA (c)		76,738	$	1,685,315
				91,352,497
Germany — 6.6%
Allianz SE Registered		12,603		3,501,673
BASF SE		65,501		3,165,050
Bayer AG Registered		101,465		2,869,325
Covestro AG (b) (c)		86,407		5,064,895
Daimler Truck Holding AG		55,625		2,213,019
Deutsche Boerse AG		5,509		1,126,119
Deutsche Post AG		54,229		2,194,183
Deutsche Telekom AG Registered		404,412		10,173,338
Douglas AG (c)		55,219		1,008,775
Evotec SE (c)		190,470		1,830,058
Fresenius SE & Co. KGaA (c)		116,107		3,467,948
Heidelberg Materials AG		19,707		2,042,106
KION Group AG		59,394		2,485,702
Mercedes Benz Group AG		31,762		2,194,878
Merck KGaA		7,650		1,267,642
Muenchener Rueckversicherungs-Gesellschaft AG in Muenchen Registered		14,052		7,026,490
Puma SE		47,060		2,162,836
SAP SE		54,277		11,020,127
Schott Pharma AG & Co. KGaA (a)		36,452		1,194,839
Siemens AG Registered		107,007		19,902,140
Siemens Healthineers AG (b)		96,201		5,541,684
				91,452,827
Guatemala — 0.1%
Millicom International Cellular SA SDR (c)		73,325		1,783,533
Hong Kong — 1.2%
AIA Group Ltd.		1,416,000		9,601,825
Hong Kong Exchanges & Clearing Ltd.		45,500		1,449,715
Hongkong Land Holdings Ltd.		307,500		993,279
Jardine Matheson Holdings Ltd.		26,300		929,546
Prudential PLC		315,145		2,858,966
Sun Hung Kai Properties Ltd.		66,000		570,618
Wharf Real Estate Investment Co. Ltd.		306,000		808,706
				17,212,655
Hungary — 0.4%
OTP Bank Nyrt		112,613		5,583,403
India — 4.8%
Ashok Leyland Ltd.		691,838		1,995,809
Asian Paints Ltd.		25,800		900,512
Axis Bank Ltd.		401,179		6,071,936
HDFC Asset Management Co. Ltd. (b)		17,131		821,958
HDFC Bank Ltd.		303,146		6,128,081
HDFC Life Insurance Co. Ltd. (b)		162,555		1,158,974
Hindalco Industries Ltd.		317,239		2,625,946
Hindustan Unilever Ltd.		24,313		717,986
ICICI Bank Ltd.		382,513		5,483,229
ICICI Bank Ltd. Sponsored ADR		60,592		1,745,656
Indraprastha Gas Ltd.		363,209		2,185,694
Infosys Ltd.		105,405		1,979,094
InterGlobe Aviation Ltd. (b) (c)		9,672		490,106

MassMutual Select T. Rowe Price International Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Jio Financial Services Ltd. (c)		75,913	$	324,811
Kotak Mahindra Bank Ltd.		223,942		4,817,924
Larsen & Toubro Ltd.		92,692		3,924,197
NTPC Ltd.		1,139,844		5,156,368
Reliance Industries Ltd.		255,250		9,547,444
Shree Cement Ltd.		7,044		2,355,633
Shriram Finance Ltd.		84,635		2,959,964
Tata Consultancy Services Ltd.		14,148		660,814
Tech Mahindra Ltd.		107,554		1,842,676
Titan Co. Ltd.		15,756		640,945
Varun Beverages Ltd.		71,691		1,392,718
Voltas Ltd.		12,730		224,469
				66,152,944
Indonesia — 0.9%
Bank Central Asia Tbk. PT		8,686,100		5,240,056
Bank Mandiri Persero Tbk. PT		2,042,600		762,785
Bank Rakyat Indonesia Persero Tbk. PT		9,818,964		2,739,280
Sarana Menara Nusantara Tbk. PT		16,896,000		757,443
Sumber Alfaria Trijaya Tbk. PT		2,872,100		480,667
Telkom Indonesia Persero Tbk. PT		10,484,300		1,989,519
				11,969,750
Ireland — 0.2%
AerCap Holdings NV		23,273		2,169,044
Italy — 2.0%
Banca Mediolanum SpA		178,678		1,978,957
DiaSorin SpA		22,607		2,246,028
Enel SpA		597,143		4,165,378
Ermenegildo Zegna NV (a)		104,330		1,235,267
Intesa Sanpaolo SpA		632,421		2,361,408
Leonardo SpA		152,955		3,565,223
Moncler SpA		34,106		2,088,683
Prysmian SpA		65,680		4,046,473
UniCredit SpA		157,789		5,879,288
				27,566,705
Japan — 14.4%
Asahi Group Holdings Ltd.		70,800		2,500,857
Asahi Kasei Corp.		157,300		1,007,151
Astellas Pharma, Inc.		417,300		4,127,051
Calbee, Inc.		101,800		1,951,127
Central Japan Railway Co.		64,600		1,394,480
Chugai Pharmaceutical Co. Ltd.		146,500		5,229,583
CyberAgent, Inc.		176,700		1,101,114
Daiichi Sankyo Co. Ltd.		90,200		3,151,013
Daikin Industries Ltd.		10,500		1,450,496
Denso Corp.		164,500		2,567,359
Disco Corp.		11,500		4,406,510
Electric Power Development Co. Ltd. Class C		86,600		1,349,644
Fujitsu Ltd.		143,600		2,256,225
Hamamatsu Photonics KK		36,600		987,189
Hikari Tsushin, Inc.		10,400		1,932,995
Hitachi Ltd.		297,000		6,694,816
Honda Motor Co. Ltd.		81,500		876,752

MassMutual Select T. Rowe Price International Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Isetan Mitsukoshi Holdings Ltd.		78,700	$	1,483,705
Kao Corp. (a)		56,200		2,283,505
Keyence Corp.		7,400		3,264,698
Kirin Holdings Co. Ltd. (a)		68,300		881,018
LY Corp.		820,900		1,977,617
MatsukiyoCocokara & Co.		113,600		1,635,615
MINEBEA MITSUMI, Inc.		56,100		1,156,949
Mitsubishi Corp.		89,400		1,758,370
Mitsubishi Electric Corp.		376,700		6,021,873
Mitsubishi Estate Co. Ltd.		170,300		2,682,722
Mitsubishi HC Capital, Inc.		174,400		1,154,204
Mitsubishi UFJ Financial Group, Inc.		820,000		8,846,907
Mitsui Fudosan Co. Ltd.		885,700		8,146,838
Murata Manufacturing Co. Ltd.		233,300		4,842,579
Nextage Co. Ltd. (a)		96,600		1,446,222
Nippon Sanso Holdings Corp.		54,800		1,630,401
Nippon Steel Corp. (a)		76,000		1,601,261
Nippon Telegraph & Telephone Corp.		7,931,700		7,496,609
Niterra Co. Ltd.		37,800		1,102,423
Nomura Research Institute Ltd.		56,800		1,603,492
NTT Data Group Corp.		148,300		2,190,151
Olympus Corp.		253,100		4,071,849
Omron Corp.		21,700		748,986
Open House Group Co. Ltd.		16,800		513,281
ORIX Corp.		138,600		3,074,890
Otsuka Holdings Co. Ltd.		64,100		2,703,003
Panasonic Holdings Corp.		212,400		1,745,065
Persol Holdings Co. Ltd.		2,329,400		3,236,654
Recruit Holdings Co. Ltd.		125,800		6,770,400
Renesas Electronics Corp.		91,700		1,731,391
Resona Holdings, Inc.		245,100		1,627,479
Sega Sammy Holdings, Inc.		75,900		1,127,050
Seven & i Holdings Co. Ltd.		791,200		9,636,417
Shimadzu Corp.		55,900		1,403,581
Shionogi & Co. Ltd.		23,100		903,510
SMC Corp.		2,500		1,193,607
Sompo Holdings, Inc.		141,700		3,027,714
Sony Group Corp.		81,800		6,950,707
Stanley Electric Co. Ltd.		104,000		1,858,986
SUMCO Corp. (a)		89,000		1,292,613
Sumitomo Corp.		215,300		5,406,814
Sumitomo Metal Mining Co. Ltd.		31,000		957,271
Sumitomo Mitsui Trust Holdings, Inc.		54,600		1,247,024
Suzuki Motor Corp.		165,400		1,914,211
Taiheiyo Cement Corp.		63,600		1,601,082
Takeda Pharmaceutical Co. Ltd.		58,900		1,527,788
TechnoPro Holdings, Inc. (a)		77,600		1,272,508
THK Co. Ltd.		44,700		802,997
Tokio Marine Holdings, Inc.		133,300		5,003,495
Tokyo Electron Ltd.		27,700		6,082,840
Toyota Motor Corp.		572,800		11,792,976
Welcia Holdings Co. Ltd. (a)		28,500		355,449
				197,773,159
Luxembourg — 0.3%
ArcelorMittal SA		71,875		1,638,626

MassMutual Select T. Rowe Price International Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
CVC Capital Partners PLC (b) (c)		168,784	$	3,097,311
				4,735,937
Macau — 0.2%
Galaxy Entertainment Group Ltd.		723,000		3,367,731
Malaysia — 0.3%
CIMB Group Holdings Bhd.		1,400,096		2,014,546
Tenaga Nasional Bhd.		620,300		1,811,808
				3,826,354
Mexico — 0.6%
Becle SAB de CV (a)		261,363		471,439
Fomento Economico Mexicano SAB de CV ADR		3,041		327,364
Gruma SAB de CV Class B		148,628		2,722,423
Grupo Aeroportuario del Pacifico SAB de CV ADR		6,525		1,016,399
Grupo Mexico SAB de CV Series B		529,039		2,854,411
Wal-Mart de Mexico SAB de CV		392,630		1,341,101
				8,733,137
Netherlands — 5.1%
Adyen NV (b) (c)		2,090		2,491,807
Akzo Nobel NV		52,949		3,219,412
Argenx SE ADR (c)		8,327		3,580,943
ASML Holding NV		26,388		27,224,437
ASR Nederland NV		33,067		1,575,464
Euronext NV (b)		16,093		1,485,682
Heineken NV (a)		89,769		8,664,868
ING Groep NV Series N		857,663		14,695,783
Koninklijke Philips NV (c)		268,564		6,753,376
				69,691,772
Norway — 1.0%
DNB Bank ASA		219,957		4,319,172
Equinor ASA		164,675		4,705,209
Equinor ASA ADR		78,933		2,254,326
Storebrand ASA		233,637		2,383,887
				13,662,594
Peru — 0.0%
Credicorp Ltd.		3,402		548,845
Philippines — 0.3%
BDO Unibank, Inc.		370,144		810,359
Jollibee Foods Corp.		168,590		649,272
SM Investments Corp.		153,480		2,170,709
				3,630,340
Poland — 0.1%
Powszechny Zaklad Ubezpieczen SA		149,869		1,911,791
Portugal — 0.9%
Banco Comercial Portugues SA Class R		4,867,016		1,757,870
Galp Energia SGPS SA		353,128		7,460,587

MassMutual Select T. Rowe Price International Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Jeronimo Martins SGPS SA		175,421	$	3,425,583
				12,644,040
Republic of Korea — 4.3%
CJ CheilJedang Corp.		6,425		1,793,149
Coupang, Inc. (c)		44,526		932,820
HL Mando Co. Ltd.		28,785		913,828
Hyundai Mobis Co. Ltd.		5,461		994,710
Hyundai Motor Co.		15,484		3,301,932
KB Financial Group, Inc.		22,111		1,253,800
KT Corp. Sponsored ADR (a)		140,056		1,914,566
KT Corp.		60,425		1,637,448
LG Chem Ltd.		10,614		2,653,550
NAVER Corp.		21,235		2,572,826
Samsung Electronics Co. Ltd.		568,681		33,418,990
Samsung Life Insurance Co. Ltd.		26,296		1,680,332
SK Hynix, Inc.		35,060		5,945,825
				59,013,776
Russia — 0.0%
Gazprom PJSC (c) (d) (e)		496,602		—
Novatek PJSC (c) (d) (e)		73,140		—
				—
Saudi Arabia — 1.0%
Al Rajhi Bank		74,229		1,615,918
Arabian Internet & Communications Services Co.		5,536		431,310
Saudi Awwal Bank		298,899		3,077,093
Saudi Basic Industries Corp.		119,222		2,335,516
Saudi National Bank		630,226		6,198,794
				13,658,631
Singapore — 0.7%
DBS Group Holdings Ltd.		80,190		2,113,061
Sea Ltd. ADR (c)		22,193		1,585,024
United Overseas Bank Ltd.		267,900		6,186,238
				9,884,323
South Africa — 0.5%
Bid Corp. Ltd.		27,213		634,097
Capitec Bank Holdings Ltd.		3,108		448,930
Clicks Group Ltd. (a)		44,989		851,560
FirstRand Ltd.		547,353		2,306,062
Foschini Group Ltd.		125,580		876,132
Kumba Iron Ore Ltd.		50,323		1,210,272
Sanlam Ltd.		61,384		272,874
				6,599,927
Spain — 0.5%
Amadeus IT Group SA		85,880		5,714,942
Puig Brands SA (c)		45,695		1,277,258
				6,992,200

MassMutual Select T. Rowe Price International Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Sweden — 1.9%
Assa Abloy AB Class B		89,045	$	2,523,543
Autoliv, Inc.		21,685		2,314,820
Boliden AB		49,837		1,587,513
Elekta AB Class B		169,836		1,060,371
Essity AB Class B		167,804		4,289,482
Hexagon AB Class B		174,589		1,959,806
Sandvik AB		115,367		2,319,069
Svenska Handelsbanken AB Class A		254,521		2,424,489
Swedbank AB Class A		130,105		2,684,220
Telefonaktiebolaget LM Ericsson Class B		794,524		4,932,318
				26,095,631
Switzerland — 3.0%
ABB Ltd. Registered		93,633		5,183,341
Alcon, Inc.		61,993		5,515,581
Barry Callebaut AG Registered		667		1,086,994
Cie Financiere Richemont SA Registered Class A		20,300		3,168,196
Julius Baer Group Ltd.		128,892		7,196,628
Novartis AG Registered		88,768		9,509,927
Partners Group Holding AG		2,453		3,154,580
Sandoz Group AG		65,202		2,359,044
Sonova Holding AG Registered		2,962		911,315
Zurich Insurance Group AG		7,070		3,761,313
				41,846,919
Taiwan — 5.4%
Accton Technology Corp.		34,000		577,544
Advantech Co. Ltd.		51,000		580,064
ASE Technology Holding Co. Ltd.		637,000		3,286,967
Bizlink Holding, Inc.		91,308		1,048,710
Chailease Holding Co. Ltd.		224,720		1,061,891
Delta Electronics, Inc.		145,000		1,722,518
Hon Hai Precision Industry Co. Ltd.		962,000		6,306,085
Largan Precision Co. Ltd.		11,000		927,905
MediaTek, Inc.		154,000		6,583,544
Taiwan Semiconductor Manufacturing Co. Ltd.		1,777,000		52,850,661
				74,945,889
Thailand — 0.5%
Bangkok Dusit Medical Services PCL Class F		609,100		444,119
Bangkok Dusit Medical Services PCL NVDR		769,900		561,365
Bumrungrad Hospital PCL		83,400		561,341
SCB X PCL		1,146,200		3,215,653
True Corp. PCL NVDR (c)		6,751,300		1,611,743
				6,394,221
United Arab Emirates — 0.1%
ADNOC Drilling Co. PJSC		933,999		1,042,784
United Kingdom — 9.5%
Ashtead Group PLC		22,012		1,466,636
AstraZeneca PLC Sponsored ADR		306,291		23,887,635
Barclays PLC		1,192,073		3,145,088
Bridgepoint Group PLC (b)		706,275		1,969,870

MassMutual Select T. Rowe Price International Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
British American Tobacco PLC		49,289	$	1,515,150
BT Group PLC (a)		2,515,960		4,466,418
Bunzl PLC		53,476		2,028,527
CK Hutchison Holdings Ltd.		298,000		1,426,438
Compass Group PLC		141,631		3,856,048
DCC PLC		25,854		1,812,179
Diageo PLC		80,850		2,543,572
Dowlais Group PLC		503,524		462,701
Great Portland Estates PLC		404,244		1,719,610
Hiscox Ltd.		110,098		1,599,435
HSBC Holdings PLC		595,261		5,151,385
Imperial Brands PLC		168,962		4,326,073
Informa PLC		198,809		2,152,355
Investec PLC		167,688		1,216,816
Johnson Matthey PLC		63,832		1,260,828
Kingfisher PLC		836,902		2,634,492
Lloyds Banking Group PLC		4,073,804		2,822,372
London Stock Exchange Group PLC		28,278		3,351,985
Melrose Industries PLC		370,771		2,589,341
National Grid PLC		570,629		6,363,367
Next PLC		24,039		2,748,937
Pearson PLC		134,993		1,684,688
Persimmon PLC		80,635		1,370,581
Rentokil Initial PLC		192,390		1,121,787
Rolls-Royce Holdings PLC (c)		1,403,590		8,113,320
Smith & Nephew PLC		208,125		2,573,025
Smiths Group PLC		85,082		1,835,318
SSE PLC		94,427		2,129,740
Standard Chartered PLC		241,866		2,179,279
Taylor Wimpey PLC		869,703		1,554,109
Unilever PLC (ULVR LN)		242,339		13,342,617
Unilever PLC (UNA NA)		48,044		2,638,262
WPP PLC		555,778		5,094,922
				130,154,906
United States — 6.1%
Amcor PLC CDI		206,971		2,055,635
BP PLC		986,340		5,943,175
Broadcom, Inc.		4,697		7,541,174
BRP, Inc. (a)		28,151		1,803,615
Canva, Inc. (Acquired 8/16/21-11/04/21, Cost $652,842) (c) (d) (e) (f)		383		408,531
Cognizant Technology Solutions Corp. Class A		22,790		1,549,720
Experian PLC		52,913		2,453,777
Globant SA (c)		3,180		566,867
GSK PLC Sponsored ADR (a)		126,858		4,884,033
Holcim AG		2,195		194,683
Las Vegas Sands Corp.		12,551		555,382
Linde PLC (LIN GR)		5,116		2,248,343
Linde PLC (LIN US)		117		51,341
Mastercard, Inc. Class A		2,766		1,220,248
Nestle SA Registered		147,546		15,061,132
Roche Holding AG		40,621		11,272,913
Samsonite International SA (b)		341,700		1,019,385
Sanofi SA		126,792		12,187,415
Schneider Electric SE		2,699		643,992
Shell PLC ADR		55,887		4,033,924
Signify NV (b)		54,462		1,358,170
Stellantis NV		126,882		2,497,089

MassMutual Select T. Rowe Price International Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Tenaris SA		93,603	$	1,434,119
Waste Connections, Inc.		20,438		3,584,008
				84,568,671
TOTAL COMMON STOCK (Cost $1,174,647,153)				1,360,750,049
PREFERRED STOCK — 0.5%
Brazil — 0.1%
Banco Bradesco SA 10.595%
		599,700		1,328,113
Germany — 0.4%
Dr Ing hc F Porsche AG 3.323% (b)		22,436		1,668,022
Sartorius AG 0.340%
		6,369		1,492,703
Volkswagen AG 8.604%
		20,962		2,365,109
				5,525,834
United States — 0.0%
Canva, Inc., Series A, (Acquired 11/04/21, Cost $39,209) (c) (d) (e) (f)		23		24,533
TOTAL PREFERRED STOCK (Cost $9,108,796)				6,878,480
TOTAL EQUITIES (Cost $1,183,755,949)				1,367,628,529
WARRANTS — 0.0%
Canada — 0.0%
Constellation Software, Inc. (a) (c) (d) (e)		1,982		—
TOTAL WARRANTS (Cost $0)				—
RIGHTS — 0.0%
Brazil — 0.0%
Localiza Rent A Car SA (c)		2,232		3,594
Russia — 0.0%
Moscow Exchange (MOEX RM) (c) (d) (e)		1,181,630		—
Moscow Exchange (MOEX RU) (c) (d) (e)		83,990		—
				—
TOTAL RIGHTS (Cost $2,619,126)				3,594
TOTAL LONG-TERM INVESTMENTS (Cost $1,186,375,075)				1,367,632,123

MassMutual Select T. Rowe Price International Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
SHORT-TERM INVESTMENTS — 2.5%
Investment of Cash Collateral from Securities Loaned — 1.6%
State Street Navigator Securities Lending Government Money Market Portfolio (g)		21,332,293	$	21,332,293
Mutual Fund — 0.8%
T. Rowe Price Government Reserve Investment Fund		10,924,829		10,924,829
	Principal Amount
Repurchase Agreement — 0.1%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/28/24, 1.600%, due 7/01/24 (h)	$	1,318,481		1,318,481
TOTAL SHORT-TERM INVESTMENTS (Cost $33,575,603)				33,575,603
TOTAL INVESTMENTS — 101.8% (Cost $1,219,950,678) (i)				1,401,207,726
Other Assets/(Liabilities) — (1.8)%				(24,443,056)
NET ASSETS — 100.0%			$	1,376,764,670

Abbreviation Legend

ADR American Depositary Receipt

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2024, was $43,604,985 or 3.17% of net assets. The Fund received $24,528,117 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) 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 June 30, 2024, the aggregate market value of these securities amounted to $36,779,513 or 2.67% of net assets.

(c) Non-income producing security.

(d) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At June 30, 2024, these securities amounted to a value of $433,064 or 0.03% of net assets.

(e) Investment is valued using significant unobservable inputs.

(f) Restricted security. Certain securities are restricted to resale. At June 30, 2024, these securities amounted to a value of $433,064 or 0.03% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

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

(h) Maturity value of $1,318,657. Collateralized by U.S. Government Agency obligations with a rate of 4.500%, maturity date of 3/31/26, and an aggregate market value, including accrued interest, of $1,345,016.

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

MassMutual 20/80 Allocation Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 20.6%
DFA Commodity Strategy Portfolio		197,603	$	903,047
Invesco Real Estate Fund, Class R6		42,743		703,119
MassMutual Blue Chip Growth Fund, Class I (a)		146,553		3,534,866
MassMutual Diversified Value Fund, Class I (a)		172,890		2,140,374
MassMutual Equity Opportunities Fund, Class I (a)		266,035		4,801,934
MassMutual Fundamental Value Fund, Class I (a)		213,754		1,968,673
MassMutual Growth Opportunities Fund, Class I (a) (b)		125,716		898,867
MassMutual International Equity Fund, Class I (a)		158,624		1,338,783
MassMutual Mid Cap Growth Fund, Class I (a)		49,243		1,015,884
MassMutual Mid Cap Value Fund, Class I (a)		86,199		1,020,593
MassMutual Overseas Fund, Class I (a)		302,266		2,653,893
MassMutual Small Cap Growth Equity Fund, Class I (a) (b)		17,929		280,406
MassMutual Small Cap Value Equity Fund, Class I (a)		64,014		545,398
MassMutual Strategic Emerging Markets Fund, Class I (a)		52,276		536,878
MM Equity Asset Fund, Class I (a)		1,091,459		9,200,997
Vanguard Developed Markets Index Fund, Admiral Shares		168,066		2,662,164
Vanguard Emerging Markets Stock Index Fund, Admiral Shares		15,259		557,102
Vanguard Mid-Cap Index Fund, Admiral Shares		4,577		1,372,556
Vanguard Small-Cap Index Fund, Admiral Shares		5,168		540,583
				36,676,117
Fixed Income Funds — 79.4%
Invesco International Bond Fund, Class R6		1,664,337		7,023,501
MassMutual Core Bond Fund, Class I (a)		3,343,857		29,827,206
MassMutual Global Floating Rate Fund, Class I (a)		24,423		214,923
MassMutual High Yield Fund, Class I (a)		63,738		502,894
MassMutual Inflation-Protected and Income Fund, Class I (a)		77,246		712,209
MassMutual Short-Duration Bond Fund, Class I (a)		1,276,028		11,509,773
MassMutual Strategic Bond Fund, Class I (a)		4,228,577		35,350,901
MassMutual Total Return Bond Fund, Class I (a)		5,022,197		41,433,128
Vanguard Long-Term Treasury Index Fund, Admiral Shares		153,387		2,963,444
Vanguard Total Bond Market Index Fund, Institutional Shares		1,245,581		11,808,109
				141,346,088
TOTAL MUTUAL FUNDS (Cost $190,948,281)				178,022,205
TOTAL LONG-TERM INVESTMENTS (Cost $190,948,281)				178,022,205
TOTAL INVESTMENTS — 100.0% (Cost $190,948,281) (c)				178,022,205
Other Assets/(Liabilities) — (0.0)%				(65,355)
NET ASSETS — 100.0%			$	177,956,850

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

(b) Non-income producing security.

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

MassMutual 40/60 Allocation Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 40.7%
DFA Commodity Strategy Portfolio		202,029	$	923,272
Invesco Real Estate Fund, Class R6		86,082		1,416,053
MassMutual Blue Chip Growth Fund, Class I (a)		291,858		7,039,617
MassMutual Diversified Value Fund, Class I (a)		351,229		4,348,217
MassMutual Equity Opportunities Fund, Class I (a)		539,249		9,733,453
MassMutual Fundamental Value Fund, Class I (a)		424,112		3,906,067
MassMutual Growth Opportunities Fund, Class I (a) (b)		250,499		1,791,069
MassMutual International Equity Fund, Class I (a)		317,747		2,681,784
MassMutual Mid Cap Growth Fund, Class I (a)		99,824		2,059,370
MassMutual Mid Cap Value Fund, Class I (a)		174,766		2,069,229
MassMutual Overseas Fund, Class I (a)		596,601		5,238,156
MassMutual Small Cap Growth Equity Fund, Class I (a) (b)		36,035		563,590
MassMutual Small Cap Value Equity Fund, Class I (a)		128,964		1,098,777
MassMutual Strategic Emerging Markets Fund, Class I (a)		103,341		1,061,315
MM Equity Asset Fund, Class I (a)		2,179,150		18,370,231
Vanguard Developed Markets Index Fund, Institutional Shares		342,714		5,435,439
Vanguard Emerging Markets Stock Index Fund, Admiral Shares		31,175		1,138,211
Vanguard Mid-Cap Index Fund, Admiral Shares		9,350		2,803,788
Vanguard Small-Cap Index Fund, Admiral Shares		10,557		1,104,275
				72,781,913
Fixed Income Funds — 59.4%
Invesco International Bond Fund, Class R6		1,269,659		5,357,959
MassMutual Core Bond Fund, Class I (a)		2,497,021		22,273,425
MassMutual Global Floating Rate Fund, Class I (a)		18,672		164,313
MassMutual High Yield Fund, Class I (a)		48,426		382,080
MassMutual Inflation-Protected and Income Fund, Class I (a)		58,644		540,701
MassMutual Short-Duration Bond Fund, Class I (a)		968,005		8,731,409
MassMutual Strategic Bond Fund, Class I (a)		3,158,713		26,406,844
MassMutual Total Return Bond Fund, Class I (a)		3,751,734		30,951,805
Vanguard Long-Term Treasury Index Fund, Admiral Shares		128,764		2,487,716
Vanguard Total Bond Market Index Fund, Institutional Shares		948,751		8,994,162
				106,290,414
TOTAL MUTUAL FUNDS (Cost $188,013,272)				179,072,327
TOTAL LONG-TERM INVESTMENTS (Cost $188,013,272)				179,072,327
TOTAL INVESTMENTS — 100.1% (Cost $188,013,272) (c)				179,072,327
Other Assets/(Liabilities) — (0.1)%				(133,200)
NET ASSETS — 100.0%			$	178,939,127

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

(b) Non-income producing security.

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

MassMutual 60/40 Allocation Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 60.7%
DFA Commodity Strategy Portfolio		187,841	$	858,433
Invesco Real Estate Fund, Class R6		113,173		1,861,693
MassMutual Blue Chip Growth Fund, Class I (a)		392,394		9,464,549
MassMutual Diversified Value Fund, Class I (a)		459,958		5,694,283
MassMutual Equity Opportunities Fund, Class I (a)		713,894		12,885,780
MassMutual Fundamental Value Fund, Class I (a)		570,419		5,253,557
MassMutual Growth Opportunities Fund, Class I (a) (b)		329,635		2,356,892
MassMutual International Equity Fund, Class I (a)		403,305		3,403,894
MassMutual Mid Cap Growth Fund, Class I (a)		130,914		2,700,758
MassMutual Mid Cap Value Fund, Class I (a)		229,395		2,716,040
MassMutual Overseas Fund, Class I (a)		777,490		6,826,359
MassMutual Small Cap Growth Equity Fund, Class I (a) (b)		47,569		743,972
MassMutual Small Cap Value Equity Fund, Class I (a)		169,952		1,447,992
MassMutual Strategic Emerging Markets Fund, Class I (a)		134,772		1,384,111
MM Equity Asset Fund, Class I (a)		2,929,425		24,695,052
Vanguard Developed Markets Index Fund, Institutional Shares		478,096		7,582,602
Vanguard Emerging Markets Stock Index Fund, Admiral Shares		43,508		1,588,461
Vanguard Mid-Cap Index Fund, Admiral Shares		13,046		3,911,992
Vanguard Small-Cap Index Fund, Admiral Shares		14,731		1,540,831
				96,917,251
Fixed Income Funds — 39.4%
Invesco International Bond Fund, Class R6		739,158		3,119,245
MassMutual Core Bond Fund, Class I (a)		1,464,691		13,065,048
MassMutual Global Floating Rate Fund, Class I (a)		11,533		101,488
MassMutual High Yield Fund, Class I (a)		28,087		221,604
MassMutual Inflation-Protected and Income Fund, Class I (a)		35,147		324,056
MassMutual Short-Duration Bond Fund, Class I (a)		565,184		5,097,961
MassMutual Strategic Bond Fund, Class I (a)		1,850,563		15,470,704
MassMutual Total Return Bond Fund, Class I (a)		2,197,691		18,130,948
Vanguard Long-Term Treasury Index Fund, Admiral Shares		94,066		1,817,365
Vanguard Total Bond Market Index Fund, Institutional Shares		582,361		5,520,784
				62,869,203
TOTAL MUTUAL FUNDS (Cost $158,410,350)				159,786,454
TOTAL LONG-TERM INVESTMENTS (Cost $158,410,350)				159,786,454
TOTAL INVESTMENTS — 100.1% (Cost $158,410,350) (c)				159,786,454
Other Assets/(Liabilities) — (0.1)%				(98,323)
NET ASSETS — 100.0%			$	159,688,131

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

(b) Non-income producing security.

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

MassMutual 80/20 Allocation Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 80.7%
DFA Commodity Strategy Portfolio		142,830	$	652,731
Invesco Real Estate Fund, Class R6		119,167		1,960,301
MassMutual Blue Chip Growth Fund, Class I (a)		407,075		9,818,647
MassMutual Diversified Value Fund, Class I (a)		487,286		6,032,603
MassMutual Equity Opportunities Fund, Class I (a)		751,362		13,562,081
MassMutual Fundamental Value Fund, Class I (a)		591,213		5,445,068
MassMutual Growth Opportunities Fund, Class I (a) (b)		346,706		2,478,949
MassMutual International Equity Fund, Class I (a)		435,451		3,675,204
MassMutual Mid Cap Growth Fund, Class I (a)		138,120		2,849,422
MassMutual Mid Cap Value Fund, Class I (a)		241,910		2,864,214
MassMutual Overseas Fund, Class I (a)		824,381		7,238,068
MassMutual Small Cap Growth Equity Fund, Class I (a) (b)		49,863		779,858
MassMutual Small Cap Value Equity Fund, Class I (a)		178,886		1,524,112
MassMutual Strategic Emerging Markets Fund, Class I (a)		142,818		1,466,743
MM Equity Asset Fund, Class I (a)		3,041,089		25,636,383
Vanguard Developed Markets Index Fund, Institutional Shares		485,179		7,694,941
Vanguard Emerging Markets Stock Index Fund, Admiral Shares		44,150		1,611,929
Vanguard Mid-Cap Index Fund, Admiral Shares		13,238		3,969,569
Vanguard Small-Cap Index Fund, Admiral Shares		14,947		1,563,445
				100,824,268
Fixed Income Funds — 19.4%
Invesco International Bond Fund, Class R6		293,038		1,236,621
MassMutual Core Bond Fund, Class I (a)		556,295		4,962,153
MassMutual Global Floating Rate Fund, Class I (a)		7,530		66,267
MassMutual High Yield Fund, Class I (a)		8,156		64,354
MassMutual Inflation-Protected and Income Fund, Class I (a)		13,879		127,968
MassMutual Short-Duration Bond Fund, Class I (a)		221,507		1,997,992
MassMutual Strategic Bond Fund, Class I (a)		703,130		5,878,165
MassMutual Total Return Bond Fund, Class I (a)		835,866		6,895,892
Vanguard Long-Term Treasury Index Fund, Admiral Shares		52,116		1,006,885
Vanguard Total Bond Market Index Fund, Admiral Shares		214,844		2,036,716
				24,273,013
TOTAL MUTUAL FUNDS (Cost $118,614,338)				125,097,281
TOTAL LONG-TERM INVESTMENTS (Cost $118,614,338)				125,097,281
TOTAL INVESTMENTS — 100.1% (Cost $118,614,338) (c)				125,097,281
Other Assets/(Liabilities) — (0.1)%				(68,306)
NET ASSETS — 100.0%			$	125,028,975

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

(b) Non-income producing security.

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

MassMutual RetireSMART^sm by JPMorgan In Retirement Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.2%
Equity Funds — 40.1%
JPMorgan Emerging Markets Research Enhanced Equity Fund, Class R6		51,373	$	857,416
JPMorgan Large Cap Value Fund, Class R6		48,818		975,881
MassMutual Blue Chip Growth Fund, Class I (a)		61,461		1,482,440
MassMutual Diversified Value Fund, Class I (a)		66,680		825,495
MassMutual Equity Opportunities Fund, Class I (a)		124,780		2,252,275
MassMutual Fundamental Value Fund, Class I (a)		118,472		1,091,128
MassMutual Growth Opportunities Fund, Class I (a) (b)		59,557		425,834
MassMutual International Equity Fund, Class I (a)		148,176		1,250,609
MassMutual Mid Cap Growth Fund, Class I (a)		30,146		621,921
MassMutual Mid Cap Value Fund, Class I (a)		52,846		625,699
MassMutual Overseas Fund, Class I (a)		241,650		2,121,690
MassMutual Small Cap Growth Equity Fund, Class I (a) (b)		19,313		302,055
MassMutual Small Cap Value Equity Fund, Class I (a)		46,482		396,030
MassMutual Strategic Emerging Markets Fund, Class I (a)		151,128		1,552,088
MM Equity Asset Fund, Class I (a)		859,217		7,243,202
Vanguard Developed Markets Index Fund, Admiral Shares		208,751		3,306,608
Vanguard Mid-Cap Index Fund, Admiral Shares		2,013		603,624
Vanguard Real Estate Index Fund, Admiral Shares		4,884		580,266
Vanguard Small-Cap Index Fund, Admiral Shares		3,156		330,072
				26,844,333
Fixed Income Funds — 60.1%
JPMorgan Emerging Markets Debt Fund, Class R6		195,722		1,195,864
JPMorgan U.S. Government Money Market Fund, Class IM		3,394,172		3,394,172
MassMutual Core Bond Fund, Class I (a)		1,597,718		14,251,648
MassMutual High Yield Fund, Class I (a)		573,575		4,525,508
MassMutual Inflation-Protected and Income Fund, Class I (a)		367,204		3,385,619
MassMutual Strategic Bond Fund, Class I (a)		566,253		4,733,873
MassMutual Total Return Bond Fund, Class I (a)		576,768		4,758,333
Vanguard Total Bond Market Index Fund, Admiral Shares		423,172		4,011,671
				40,256,688
TOTAL MUTUAL FUNDS (Cost $66,404,120)				67,101,021
TOTAL LONG-TERM INVESTMENTS (Cost $66,404,120)				67,101,021
TOTAL INVESTMENTS — 100.2% (Cost $66,404,120) (c)				67,101,021
Other Assets/(Liabilities) — (0.2)%				(100,924)
NET ASSETS — 100.0%			$	67,000,097

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

(b) Non-income producing security.

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

MassMutual RetireSMART^sm by JPMorgan 2020 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 40.0%
JPMorgan Emerging Markets Research Enhanced Equity Fund, Class R6		83,940	$	1,400,966
JPMorgan Large Cap Value Fund, Class R6		80,642		1,612,025
MassMutual Blue Chip Growth Fund, Class I (a)		96,633		2,330,792
MassMutual Diversified Value Fund, Class I (a)		110,429		1,367,116
MassMutual Equity Opportunities Fund, Class I (a)		210,415		3,797,983
MassMutual Fundamental Value Fund, Class I (a)		186,460		1,717,297
MassMutual Growth Opportunities Fund, Class I (a) (b)		98,015		700,809
MassMutual International Equity Fund, Class I (a)		252,430		2,130,508
MassMutual Mid Cap Growth Fund, Class I (a)		50,011		1,031,719
MassMutual Mid Cap Value Fund, Class I (a)		87,605		1,037,248
MassMutual Overseas Fund, Class I (a)		370,721		3,254,930
MassMutual Small Cap Growth Equity Fund, Class I (a) (b)		31,981		500,187
MassMutual Small Cap Value Equity Fund, Class I (a)		76,657		653,116
MassMutual Strategic Emerging Markets Fund, Class I (a)		256,187		2,631,041
MM Equity Asset Fund, Class I (a)		1,351,384		11,392,170
Vanguard Developed Markets Index Fund, Institutional Shares		327,742		5,197,982
Vanguard Mid-Cap Index Fund, Admiral Shares		3,166		949,434
Vanguard Real Estate Index Fund, Admiral Shares		7,681		912,695
Vanguard Small-Cap Index Fund, Admiral Shares		4,963		519,167
				43,137,185
Fixed Income Funds — 60.1%
JPMorgan Emerging Markets Debt Fund, Class R6		321,918		1,966,921
JPMorgan U.S. Government Money Market Fund, Class IM		5,607,335		5,607,335
MassMutual Core Bond Fund, Class I (a)		2,524,396		22,517,614
MassMutual High Yield Fund, Class I (a)		966,511		7,625,773
MassMutual Inflation-Protected and Income Fund, Class I (a)		615,577		5,675,616
MassMutual Strategic Bond Fund, Class I (a)		894,710		7,479,772
MassMutual Total Return Bond Fund, Class I (a)		911,310		7,518,309
Vanguard Total Bond Market Index Fund, Institutional Shares		666,951		6,322,696
				64,714,036
TOTAL MUTUAL FUNDS (Cost $106,717,090)				107,851,221
TOTAL LONG-TERM INVESTMENTS (Cost $106,717,090)				107,851,221
TOTAL INVESTMENTS — 100.1% (Cost $106,717,090) (c)				107,851,221
Other Assets/(Liabilities) — (0.1)%				(131,060)
NET ASSETS — 100.0%			$	107,720,161

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

(b) Non-income producing security.

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

MassMutual RetireSMART^sm by JPMorgan 2025 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 45.3%
JPMorgan Emerging Markets Research Enhanced Equity Fund, Class R6		110,416	$	1,842,836
JPMorgan Large Cap Value Fund, Class R6		105,473		2,108,404
MassMutual Blue Chip Growth Fund, Class I (a)		130,045		3,136,683
MassMutual Diversified Value Fund, Class I (a)		144,402		1,787,693
MassMutual Equity Opportunities Fund, Class I (a)		271,617		4,902,687
MassMutual Fundamental Value Fund, Class I (a)		250,868		2,310,490
MassMutual Growth Opportunities Fund, Class I (a) (b)		128,010		915,275
MassMutual International Equity Fund, Class I (a)		323,557		2,730,822
MassMutual Mid Cap Growth Fund, Class I (a)		64,526		1,331,176
MassMutual Mid Cap Value Fund, Class I (a)		113,646		1,345,564
MassMutual Overseas Fund, Class I (a)		511,338		4,489,547
MassMutual Small Cap Growth Equity Fund, Class I (a) (b)		41,558		649,971
MassMutual Small Cap Value Equity Fund, Class I (a)		99,598		848,575
MassMutual Strategic Emerging Markets Fund, Class I (a)		328,603		3,374,755
MM Equity Asset Fund, Class I (a)		1,816,611		15,314,031
Vanguard Developed Markets Index Fund, Institutional Shares		436,879		6,928,909
Vanguard Mid-Cap Index Fund, Admiral Shares		4,221		1,265,727
Vanguard Real Estate Index Fund, Admiral Shares		10,207		1,212,766
Vanguard Small-Cap Index Fund, Admiral Shares		6,616		692,080
				57,187,991
Fixed Income Funds — 54.8%
JPMorgan Emerging Markets Debt Fund, Class R6		339,268		2,072,929
JPMorgan U.S. Government Money Market Fund, Class IM		3,884,310		3,884,310
MassMutual Core Bond Fund, Class I (a)		2,894,290		25,817,067
MassMutual High Yield Fund, Class I (a)		1,002,963		7,913,379
MassMutual Inflation-Protected and Income Fund, Class I (a)		561,762		5,179,443
MassMutual Strategic Bond Fund, Class I (a)		1,026,848		8,584,452
MassMutual Total Return Bond Fund, Class I (a)		1,045,877		8,628,483
Vanguard Total Bond Market Index Fund, Institutional Shares		759,278		7,197,955
				69,278,018
TOTAL MUTUAL FUNDS (Cost $125,551,731)				126,466,009
TOTAL LONG-TERM INVESTMENTS (Cost $125,551,731)				126,466,009
TOTAL INVESTMENTS — 100.1% (Cost $125,551,731) (c)				126,466,009
Other Assets/(Liabilities) — (0.1)%				(87,756)
NET ASSETS — 100.0%			$	126,378,253

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

(b) Non-income producing security.

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

MassMutual RetireSMART^sm by JPMorgan 2030 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 58.3%
JPMorgan Emerging Markets Research Enhanced Equity Fund, Class R6		287,405	$	4,796,797
JPMorgan Large Cap Value Fund, Class R6		275,396		5,505,158
MassMutual Blue Chip Growth Fund, Class I (a)		337,088		8,130,554
MassMutual Diversified Value Fund, Class I (a)		374,850		4,640,639
MassMutual Equity Opportunities Fund, Class I (a)		701,496		12,662,003
MassMutual Fundamental Value Fund, Class I (a)		651,170		5,997,277
MassMutual Growth Opportunities Fund, Class I (a) (b)		331,199		2,368,071
MassMutual International Equity Fund, Class I (a)		841,700		7,103,950
MassMutual Mid Cap Growth Fund, Class I (a)		167,123		3,447,742
MassMutual Mid Cap Value Fund, Class I (a)		295,287		3,496,194
MassMutual Overseas Fund, Class I (a)		1,348,823		11,842,666
MassMutual Small Cap Growth Equity Fund, Class I (a) (b)		106,397		1,664,054
MassMutual Small Cap Value Equity Fund, Class I (a)		254,627		2,169,424
MassMutual Strategic Emerging Markets Fund, Class I (a)		857,228		8,803,734
MM Equity Asset Fund, Class I (a)		4,717,093		39,765,093
Vanguard Developed Markets Index Fund, Institutional Shares		1,110,063		17,605,604
Vanguard Mid-Cap Index Fund, Admiral Shares		10,674		3,200,725
Vanguard Real Estate Index Fund, Admiral Shares		25,725		3,056,699
Vanguard Small-Cap Index Fund, Admiral Shares		16,597		1,736,039
				147,992,423
Fixed Income Funds — 41.8%
JPMorgan Emerging Markets Debt Fund, Class R6		522,379		3,191,734
MassMutual Core Bond Fund, Class I (a)		5,022,941		44,804,634
MassMutual High Yield Fund, Class I (a)		1,536,897		12,126,118
MassMutual Inflation-Protected and Income Fund, Class I (a)		424,172		3,910,864
MassMutual Strategic Bond Fund, Class I (a)		1,782,242		14,899,542
MassMutual Total Return Bond Fund, Class I (a)		1,815,188		14,975,302
Vanguard Total Bond Market Index Fund, Institutional Shares		1,285,324		12,184,869
				106,093,063
TOTAL MUTUAL FUNDS (Cost $245,445,118)				254,085,486
TOTAL LONG-TERM INVESTMENTS (Cost $245,445,118)				254,085,486
TOTAL INVESTMENTS — 100.1% (Cost $245,445,118) (c)				254,085,486
Other Assets/(Liabilities) — (0.1)%				(229,781)
NET ASSETS — 100.0%			$	253,855,705

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

(b) Non-income producing security.

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

MassMutual RetireSMART^sm by JPMorgan 2035 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 70.6%
JPMorgan Emerging Markets Research Enhanced Equity Fund, Class R6		393,530	$	6,568,018
JPMorgan Large Cap Value Fund, Class R6		195,050		3,899,044
MassMutual Blue Chip Growth Fund, Class I (a)		377,701		9,110,147
MassMutual Diversified Value Fund, Class I (a)		265,739		3,289,846
MassMutual Equity Opportunities Fund, Class I (a)		310,438		5,603,399
MassMutual Fundamental Value Fund, Class I (a)		425,695		3,920,647
MassMutual Growth Opportunities Fund, Class I (a) (b)		397,763		2,844,005
MassMutual International Equity Fund, Class I (a)		765,658		6,462,154
MassMutual Mid Cap Growth Fund, Class I (a)		119,491		2,465,090
MassMutual Mid Cap Value Fund, Class I (a)		209,452		2,479,913
MassMutual Overseas Fund, Class I (a)		1,181,055		10,369,666
MassMutual Small Cap Growth Equity Fund, Class I (a) (b)		75,758		1,184,856
MassMutual Small Cap Value Equity Fund, Class I (a)		181,507		1,546,440
MassMutual Strategic Emerging Markets Fund, Class I (a)		331,176		3,401,175
MM Equity Asset Fund, Class I (a)		3,521,786		29,688,654
Vanguard Developed Markets Index Fund, Institutional Shares		638,677		10,129,413
Vanguard Mid-Cap Index Fund, Admiral Shares		7,901		2,369,062
Vanguard Real Estate Index Fund, Admiral Shares		19,106		2,270,182
Vanguard Small-Cap Index Fund, Admiral Shares		12,176		1,273,593
				108,875,304
Fixed Income Funds — 29.5%
JPMorgan Emerging Markets Debt Fund, Class R6		218,816		1,336,963
MassMutual Core Bond Fund, Class I (a)		875,858		7,812,650
MassMutual High Yield Fund, Class I (a)		647,743		5,110,694
MassMutual Strategic Bond Fund, Class I (a)		1,731,148		14,472,396
MassMutual Total Return Bond Fund, Class I (a)		1,762,857		14,543,569
Vanguard Total Bond Market Index Fund, Admiral Shares		222,896		2,113,050
				45,389,322
TOTAL MUTUAL FUNDS (Cost $148,166,465)				154,264,626
TOTAL LONG-TERM INVESTMENTS (Cost $148,166,465)				154,264,626
TOTAL INVESTMENTS — 100.1% (Cost $148,166,465) (c)				154,264,626
Other Assets/(Liabilities) — (0.1)%				(114,443)
NET ASSETS — 100.0%			$	154,150,183

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

(b) Non-income producing security.

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

MassMutual RetireSMART^sm by JPMorgan 2040 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 80.4%
JPMorgan Emerging Markets Research Enhanced Equity Fund, Class R6		588,605	$	9,823,813
JPMorgan Large Cap Value Fund, Class R6		287,986		5,756,843
MassMutual Blue Chip Growth Fund, Class I (a)		546,191		13,174,128
MassMutual Diversified Value Fund, Class I (a)		394,322		4,881,711
MassMutual Equity Opportunities Fund, Class I (a)		459,956		8,302,210
MassMutual Fundamental Value Fund, Class I (a)		614,668		5,661,094
MassMutual Growth Opportunities Fund, Class I (a) (b)		588,979		4,211,198
MassMutual International Equity Fund, Class I (a)		1,144,897		9,662,927
MassMutual Mid Cap Growth Fund, Class I (a)		178,513		3,682,720
MassMutual Mid Cap Value Fund, Class I (a)		312,663		3,701,930
MassMutual Overseas Fund, Class I (a)		1,697,431		14,903,446
MassMutual Small Cap Growth Equity Fund, Class I (a) (b)		113,069		1,768,394
MassMutual Small Cap Value Equity Fund, Class I (a)		271,494		2,313,131
MassMutual Strategic Emerging Markets Fund, Class I (a)		483,069		4,961,114
MM Equity Asset Fund, Class I (a)		5,091,191		42,918,742
Vanguard Developed Markets Index Fund, Institutional Shares		912,465		14,471,702
Vanguard Mid-Cap Index Fund, Admiral Shares		11,330		3,397,489
Vanguard Real Estate Index Fund, Admiral Shares		27,586		3,277,816
Vanguard Small-Cap Index Fund, Admiral Shares		17,507		1,831,208
				158,701,616
Fixed Income Funds — 19.7%
JPMorgan Emerging Markets Debt Fund, Class R6		193,488		1,182,211
MassMutual Core Bond Fund, Class I (a)		747,434		6,667,114
MassMutual High Yield Fund, Class I (a)		561,848		4,432,983
MassMutual Strategic Bond Fund, Class I (a)		1,478,619		12,361,255
MassMutual Total Return Bond Fund, Class I (a)		1,505,004		12,416,284
Vanguard Total Bond Market Index Fund, Admiral Shares		187,068		1,773,404
				38,833,251
TOTAL MUTUAL FUNDS (Cost $183,619,670)				197,534,867
TOTAL LONG-TERM INVESTMENTS (Cost $183,619,670)				197,534,867
TOTAL INVESTMENTS — 100.1% (Cost $183,619,670) (c)				197,534,867
Other Assets/(Liabilities) — (0.1)%				(150,241)
NET ASSETS — 100.0%			$	197,384,626

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

(b) Non-income producing security.

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

MassMutual RetireSMART^sm by JPMorgan 2045 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 88.0%
JPMorgan Emerging Markets Research Enhanced Equity Fund, Class R6		385,089	$	6,427,129
JPMorgan Large Cap Value Fund, Class R6		189,428		3,786,661
MassMutual Blue Chip Growth Fund, Class I (a)		367,263		8,858,380
MassMutual Diversified Value Fund, Class I (a)		259,276		3,209,840
MassMutual Equity Opportunities Fund, Class I (a)		301,988		5,450,881
MassMutual Fundamental Value Fund, Class I (a)		412,720		3,801,150
MassMutual Growth Opportunities Fund, Class I (a) (b)		386,706		2,764,946
MassMutual International Equity Fund, Class I (a)		743,560		6,275,647
MassMutual Mid Cap Growth Fund, Class I (a)		116,954		2,412,754
MassMutual Mid Cap Value Fund, Class I (a)		204,920		2,426,258
MassMutual Overseas Fund, Class I (a)		1,140,006		10,009,249
MassMutual Small Cap Growth Equity Fund, Class I (a) (b)		74,252		1,161,304
MassMutual Small Cap Value Equity Fund, Class I (a)		177,817		1,515,003
MassMutual Strategic Emerging Markets Fund, Class I (a)		319,585		3,282,139
MM Equity Asset Fund, Class I (a)		3,424,708		28,870,293
Vanguard Developed Markets Index Fund, Institutional Shares		621,950		9,864,121
Vanguard Mid-Cap Index Fund, Admiral Shares		7,728		2,317,421
Vanguard Real Estate Index Fund, Admiral Shares		18,754		2,228,362
Vanguard Small-Cap Index Fund, Admiral Shares		11,873		1,241,911
				105,903,449
Fixed Income Funds — 12.1%
JPMorgan Emerging Markets Debt Fund, Class R6		71,773		438,536
MassMutual Core Bond Fund, Class I (a)		281,227		2,508,547
MassMutual High Yield Fund, Class I (a)		207,464		1,636,893
MassMutual Strategic Bond Fund, Class I (a)		555,812		4,646,588
MassMutual Total Return Bond Fund, Class I (a)		566,068		4,670,059
Vanguard Total Bond Market Index Fund, Admiral Shares		71,772		680,403
				14,581,026
TOTAL MUTUAL FUNDS (Cost $111,897,213)				120,484,475
TOTAL LONG-TERM INVESTMENTS (Cost $111,897,213)				120,484,475
TOTAL INVESTMENTS — 100.1% (Cost $111,897,213) (c)				120,484,475
Other Assets/(Liabilities) — (0.1)%				(85,234)
NET ASSETS — 100.0%			$	120,399,241

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

(b) Non-income producing security.

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

MassMutual RetireSMART^sm by JPMorgan 2050 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 92.1%
JPMorgan Emerging Markets Research Enhanced Equity Fund, Class R6		515,082	$	8,596,716
JPMorgan Large Cap Value Fund, Class R6		251,043		5,018,345
MassMutual Blue Chip Growth Fund, Class I (a)		486,417		11,732,375
MassMutual Diversified Value Fund, Class I (a)		344,628		4,266,489
MassMutual Equity Opportunities Fund, Class I (a)		401,031		7,238,605
MassMutual Fundamental Value Fund, Class I (a)		548,177		5,048,713
MassMutual Growth Opportunities Fund, Class I (a) (b)		514,830		3,681,037
MassMutual International Equity Fund, Class I (a)		1,003,005		8,465,366
MassMutual Mid Cap Growth Fund, Class I (a)		155,692		3,211,930
MassMutual Mid Cap Value Fund, Class I (a)		272,634		3,227,984
MassMutual Overseas Fund, Class I (a)		1,538,675		13,509,562
MassMutual Small Cap Growth Equity Fund, Class I (a) (b)		98,743		1,544,335
MassMutual Small Cap Value Equity Fund, Class I (a)		236,523		2,015,172
MassMutual Strategic Emerging Markets Fund, Class I (a)		428,752		4,403,281
MM Equity Asset Fund, Class I (a)		4,537,450		38,250,702
Vanguard Developed Markets Index Fund, Institutional Shares		782,806		12,415,301
Vanguard Mid-Cap Index Fund, Admiral Shares		9,727		2,916,823
Vanguard Real Estate Index Fund, Admiral Shares		23,687		2,814,516
Vanguard Small-Cap Index Fund, Admiral Shares		14,944		1,563,163
				139,920,415
Fixed Income Funds — 8.0%
JPMorgan Emerging Markets Debt Fund, Class R6		61,314		374,630
MassMutual Core Bond Fund, Class I (a)		232,440		2,073,362
MassMutual High Yield Fund, Class I (a)		174,571		1,377,364
MassMutual Strategic Bond Fund, Class I (a)		459,579		3,842,081
MassMutual Total Return Bond Fund, Class I (a)		467,780		3,859,188
Vanguard Total Bond Market Index Fund, Admiral Shares		56,269		533,435
				12,060,060
TOTAL MUTUAL FUNDS (Cost $138,049,941)				151,980,475
TOTAL LONG-TERM INVESTMENTS (Cost $138,049,941)				151,980,475
TOTAL INVESTMENTS — 100.1% (Cost $138,049,941) (c)				151,980,475
Other Assets/(Liabilities) — (0.1)%				(100,482)
NET ASSETS — 100.0%			$	151,879,993

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

(b) Non-income producing security.

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

MassMutual RetireSMART^sm by JPMorgan 2055 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 92.2%
JPMorgan Emerging Markets Research Enhanced Equity Fund, Class R6		225,690	$	3,766,767
JPMorgan Large Cap Value Fund, Class R6		110,309		2,205,078
MassMutual Blue Chip Growth Fund, Class I (a)		218,851		5,278,684
MassMutual Diversified Value Fund, Class I (a)		150,683		1,865,451
MassMutual Equity Opportunities Fund, Class I (a)		176,187		3,180,167
MassMutual Fundamental Value Fund, Class I (a)		245,861		2,264,378
MassMutual Growth Opportunities Fund, Class I (a) (b)		225,037		1,609,015
MassMutual International Equity Fund, Class I (a)		431,200		3,639,328
MassMutual Mid Cap Growth Fund, Class I (a)		68,256		1,408,118
MassMutual Mid Cap Value Fund, Class I (a)		119,393		1,413,611
MassMutual Overseas Fund, Class I (a)		684,181		6,007,105
MassMutual Small Cap Growth Equity Fund, Class I (a) (b)		43,429		679,231
MassMutual Small Cap Value Equity Fund, Class I (a)		103,938		885,552
MassMutual Strategic Emerging Markets Fund, Class I (a)		191,066		1,962,250
MM Equity Asset Fund, Class I (a)		2,039,893		17,196,297
Vanguard Developed Markets Index Fund, Institutional Shares		366,250		5,808,717
Vanguard Mid-Cap Index Fund, Admiral Shares		4,551		1,364,689
Vanguard Real Estate Index Fund, Admiral Shares		11,083		1,316,870
Vanguard Small-Cap Index Fund, Admiral Shares		6,992		731,360
				62,582,668
Fixed Income Funds — 7.9%
JPMorgan Emerging Markets Debt Fund, Class R6		27,036		165,192
MassMutual Core Bond Fund, Class I (a)		103,905		926,835
MassMutual High Yield Fund, Class I (a)		76,940		607,060
MassMutual Strategic Bond Fund, Class I (a)		205,385		1,717,020
MassMutual Total Return Bond Fund, Class I (a)		209,147		1,725,460
Vanguard Total Bond Market Index Fund, Admiral Shares		26,326		249,573
				5,391,140
TOTAL MUTUAL FUNDS (Cost $62,363,740)				67,973,808
TOTAL LONG-TERM INVESTMENTS (Cost $62,363,740)				67,973,808
TOTAL INVESTMENTS — 100.1% (Cost $62,363,740) (c)				67,973,808
Other Assets/(Liabilities) — (0.1)%				(54,036)
NET ASSETS — 100.0%			$	67,919,772

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

(b) Non-income producing security.

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

MassMutual RetireSMART^sm by JPMorgan 2060 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 92.2%
JPMorgan Emerging Markets Research Enhanced Equity Fund, Class R6		88,920	$	1,484,071
JPMorgan Large Cap Value Fund, Class R6		43,023		860,022
MassMutual Blue Chip Growth Fund, Class I (a)		84,995		2,050,074
MassMutual Diversified Value Fund, Class I (a)		59,008		730,517
MassMutual Equity Opportunities Fund, Class I (a)		68,323		1,233,228
MassMutual Fundamental Value Fund, Class I (a)		95,355		878,215
MassMutual Growth Opportunities Fund, Class I (a) (b)		88,562		633,218
MassMutual International Equity Fund, Class I (a)		170,827		1,441,776
MassMutual Mid Cap Growth Fund, Class I (a)		26,826		553,421
MassMutual Mid Cap Value Fund, Class I (a)		47,032		556,864
MassMutual Overseas Fund, Class I (a)		265,329		2,329,587
MassMutual Small Cap Growth Equity Fund, Class I (a) (b)		17,044		266,568
MassMutual Small Cap Value Equity Fund, Class I (a)		40,743		347,130
MassMutual Strategic Emerging Markets Fund, Class I (a)		74,762		767,809
MM Equity Asset Fund, Class I (a)		791,872		6,675,480
Vanguard Developed Markets Index Fund, Admiral Shares		138,800		2,198,597
Vanguard Mid-Cap Index Fund, Admiral Shares		1,722		516,255
Vanguard Real Estate Index Fund, Admiral Shares		4,193		498,206
Vanguard Small-Cap Index Fund, Admiral Shares		2,645		276,675
				24,297,713
Fixed Income Funds — 7.9%
JPMorgan Emerging Markets Debt Fund, Class R6		10,511		64,220
MassMutual Core Bond Fund, Class I (a)		40,361		360,022
MassMutual High Yield Fund, Class I (a)		29,811		235,207
MassMutual Strategic Bond Fund, Class I (a)		79,800		667,130
MassMutual Total Return Bond Fund, Class I (a)		81,250		670,309
Vanguard Total Bond Market Index Fund, Admiral Shares		9,959		94,409
				2,091,297
TOTAL MUTUAL FUNDS (Cost $23,986,187)				26,389,010
TOTAL LONG-TERM INVESTMENTS (Cost $23,986,187)				26,389,010
TOTAL INVESTMENTS — 100.1% (Cost $23,986,187) (c)				26,389,010
Other Assets/(Liabilities) — (0.1)%				(16,007)
NET ASSETS — 100.0%			$	26,373,003

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

(b) Non-income producing security.

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

MassMutual RetireSMART^sm by JPMorgan 2065 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 94.9%
Equity Funds — 87.4%
JPMorgan Emerging Markets Research Enhanced Equity Fund, Class R6		4,204	$	70,171
JPMorgan Large Cap Value Fund, Class R6		1,981		39,599
MassMutual Blue Chip Growth Fund, Class I (a)		3,786		91,314
MassMutual Diversified Value Fund, Class I (a)		2,716		33,621
MassMutual Equity Opportunities Fund, Class I (a)		3,150		56,857
MassMutual Fundamental Value Fund, Class I (a)		4,295		39,561
MassMutual Growth Opportunities Fund, Class I (a) (b)		4,047		28,939
MassMutual International Equity Fund, Class I (a)		8,247		69,607
MassMutual Mid Cap Growth Fund, Class I (a)		1,234		25,463
MassMutual Mid Cap Value Fund, Class I (a)		2,156		25,528
MassMutual Overseas Fund, Class I (a)		12,541		110,113
MassMutual Small Cap Growth Equity Fund, Class I (a) (b)		779		12,190
MassMutual Small Cap Value Equity Fund, Class I (a)		1,877		15,996
MassMutual Strategic Emerging Markets Fund, Class I (a)		3,554		36,501
MM Equity Asset Fund, Class I (a)		35,371		298,180
Vanguard Developed Markets Index Fund, Admiral Shares		4,982		78,908
Vanguard Mid-Cap Index Fund, Admiral Shares		62		18,529
Vanguard Real Estate Index Fund, Admiral Shares		151		17,884
Vanguard Small-Cap Index Fund, Admiral Shares		95		9,930
				1,078,891
Fixed Income Funds — 7.5%
JPMorgan Emerging Markets Debt Fund, Class R6		478		2,919
MassMutual Core Bond Fund, Class I (a)		1,801		16,062
MassMutual High Yield Fund, Class I (a)		1,356		10,699
MassMutual Strategic Bond Fund, Class I (a)		3,568		29,826
MassMutual Total Return Bond Fund, Class I (a)		3,629		29,940
Vanguard Total Bond Market Index Fund, Admiral Shares		357		3,388
				92,834
TOTAL MUTUAL FUNDS (Cost $1,078,250)				1,171,725
TOTAL LONG-TERM INVESTMENTS (Cost $1,078,250)				1,171,725
TOTAL INVESTMENTS — 94.9% (Cost $1,078,250) (c)				1,171,725
Other Assets/(Liabilities) — 5.1%				62,547
NET ASSETS — 100.0%			$	1,234,272

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

(b) Non-income producing security.

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

MM Equity Asset Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 101.9%
COMMON STOCK — 101.9%
Communication Services — 8.8%
Alphabet, Inc. Class A		41,879	$	7,628,260
Alphabet, Inc. Class C		31,090		5,702,528
Charter Communications, Inc. Class A (a)		2,162		646,351
Comcast Corp. Class A		58,499		2,290,821
Liberty Media Corp.-Liberty SiriusXM Class A (a)		10,495		232,464
Meta Platforms, Inc. Class A		17,887		9,018,983
Netflix, Inc. (a)		1,103		744,393
T-Mobile US, Inc.		5,934		1,045,452
Warner Music Group Corp. Class A		12,023		368,505
				27,677,757
Consumer Discretionary — 11.7%
Amazon.com, Inc. (a)		73,202		14,146,287
Aptiv PLC (a)		6,175		434,844
AutoNation, Inc. (a)		422		67,258
AutoZone, Inc. (a)		788		2,335,711
Best Buy Co., Inc.		8,273		697,331
Booking Holdings, Inc.		527		2,087,711
Burlington Stores, Inc. (a)		3,115		747,600
Chipotle Mexican Grill, Inc. (a)		26,100		1,635,165
Expedia Group, Inc. (a)		6,411		807,722
Hilton Worldwide Holdings, Inc.		4,091		892,656
Lennar Corp. Class A		2,812		421,434
LKQ Corp.		4,848		201,628
Lowe's Cos., Inc.		13,497		2,975,549
McDonald's Corp.		5,656		1,441,375
O'Reilly Automotive, Inc. (a)		486		513,245
Ross Stores, Inc.		7,537		1,095,277
Royal Caribbean Cruises Ltd. (a)		7,361		1,173,564
Tesla, Inc. (a)		16,149		3,195,564
TJX Cos., Inc.		3,692		406,489
Toll Brothers, Inc.		2,957		340,587
Yum! Brands, Inc.		11,452		1,516,932
				37,133,929
Consumer Staples — 4.8%
Altria Group, Inc.		9,515		433,408
Church & Dwight Co., Inc.		3,569		370,034
Coca-Cola Co.		49,366		3,142,146
Costco Wholesale Corp.		3,272		2,781,167
Estee Lauder Cos., Inc. Class A		2,770		294,728
Kenvue, Inc.		34,818		632,991
Mondelez International, Inc. Class A		37,869		2,478,147
Monster Beverage Corp. (a)		18,062		902,197
PepsiCo, Inc.		12,126		1,999,941

MM Equity Asset Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Philip Morris International, Inc.		8,593	$	870,729
Procter & Gamble Co.		7,853		1,295,117
				15,200,605
Energy — 3.8%
Baker Hughes Co.		12,281		431,923
Chevron Corp.		3,566		557,794
ConocoPhillips		18,006		2,059,526
Diamondback Energy, Inc.		7,075		1,416,344
EOG Resources, Inc.		15,635		1,967,977
Exxon Mobil Corp.		47,696		5,490,764
				11,924,328
Financials — 12.7%
Aflac, Inc.		10,420		930,610
Ameriprise Financial, Inc.		914		390,452
Aon PLC Class A		1,082		317,654
Bank of America Corp.		93,154		3,704,735
Berkshire Hathaway, Inc. Class B (a)		10,410		4,234,788
Block, Inc. (a)		3,346		215,784
Charles Schwab Corp.		17,191		1,266,805
Citigroup, Inc.		6,458		409,825
CME Group, Inc.		7,979		1,568,671
Corpay, Inc. (a)		4,080		1,086,953
Fidelity National Information Services, Inc.		13,073		985,181
Fifth Third Bancorp		34,994		1,276,931
Goldman Sachs Group, Inc.		4,284		1,937,739
Intercontinental Exchange, Inc.		9,411		1,288,272
Mastercard, Inc. Class A		10,961		4,835,555
MetLife, Inc.		12,497		877,164
Principal Financial Group, Inc.		8,043		630,973
Progressive Corp.		9,691		2,012,918
State Street Corp.		15,179		1,123,246
Travelers Cos., Inc.		8,622		1,753,197
Truist Financial Corp.		41,788		1,623,464
US Bancorp		27,085		1,075,274
Visa, Inc. Class A		13,618		3,574,316
Wells Fargo & Co.		48,265		2,866,458
				39,986,965
Health Care — 12.0%
AbbVie, Inc.		22,132		3,796,081
Baxter International, Inc.		6,166		206,253
Becton Dickinson & Co.		1,690		394,970
Biogen, Inc. (a)		2,500		579,550
BioMarin Pharmaceutical, Inc. (a)		1,615		132,963
Boston Scientific Corp. (a)		22,425		1,726,949
Bristol-Myers Squibb Co.		40,176		1,668,509
Danaher Corp.		7,131		1,781,680
Dexcom, Inc. (a)		2,678		303,632
Elevance Health, Inc.		2,722		1,474,943
Eli Lilly & Co.		4,984		4,512,414
HCA Healthcare, Inc.		1,122		360,476
Humana, Inc.		2,114		789,896
Johnson & Johnson		12,475		1,823,346
McKesson Corp.		913		533,229

MM Equity Asset Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Medtronic PLC		18,345	$	1,443,935
Merck & Co., Inc.		15,021		1,859,600
Neurocrine Biosciences, Inc. (a)		2,129		293,099
Regeneron Pharmaceuticals, Inc. (a)		1,954		2,053,713
Sarepta Therapeutics, Inc. (a)		1,035		163,530
Stryker Corp.		7,096		2,414,414
Thermo Fisher Scientific, Inc.		4,807		2,658,271
Town Health International Medical Group Ltd.		62,000		2,223
UnitedHealth Group, Inc.		9,530		4,853,248
Vertex Pharmaceuticals, Inc. (a)		4,281		2,006,590
				37,833,514
Industrials — 8.8%
AMETEK, Inc.		1,201		200,219
Carrier Global Corp.		20,922		1,319,760
Cintas Corp.		602		421,557
CSX Corp.		34,212		1,144,391
Deere & Co.		6,097		2,278,022
Delta Air Lines, Inc.		10,059		477,199
Eaton Corp. PLC		5,798		1,817,963
FedEx Corp.		3,912		1,172,974
Honeywell International, Inc.		15,146		3,234,277
Howmet Aerospace, Inc.		17,687		1,373,042
Ingersoll Rand, Inc.		5,928		538,499
Leidos Holdings, Inc.		7,270		1,060,548
Masco Corp.		10,744		716,302
Northrop Grumman Corp.		986		429,847
Otis Worldwide Corp.		17,318		1,667,031
RTX Corp.		3,782		379,675
Textron, Inc.		12,569		1,079,174
Trane Technologies PLC		8,116		2,669,596
TransDigm Group, Inc.		436		557,038
Uber Technologies, Inc. (a)		27,663		2,010,547
Union Pacific Corp.		3,317		750,504
United Parcel Service, Inc. Class B		14,008		1,916,995
United Rentals, Inc.		936		605,339
				27,820,499
Information Technology — 32.9%
Accenture PLC Class A		5,389		1,635,076
Adobe, Inc. (a)		1,059		588,317
Advanced Micro Devices, Inc. (a)		14,846		2,408,170
Analog Devices, Inc.		11,903		2,716,979
Apple, Inc.		105,614		22,244,421
Broadcom, Inc.		1,887		3,029,635
Cadence Design Systems, Inc. (a)		1,910		587,802
Cognizant Technology Solutions Corp. Class A		19,348		1,315,664
Corning, Inc.		6,867		266,783
Hewlett Packard Enterprise Co.		32,603		690,205
Intuit, Inc.		3,469		2,279,861
Lam Research Corp.		1,031		1,097,860
Micron Technology, Inc.		14,780		1,944,013
Microsoft Corp.		57,637		25,760,857
Motorola Solutions, Inc.		1,172		452,451
NVIDIA Corp.		184,617		22,807,584
NXP Semiconductors NV		10,568		2,843,743
Qorvo, Inc. (a)		2,839		329,438

MM Equity Asset Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Salesforce, Inc.		10,509	$	2,701,864
Seagate Technology Holdings PLC		15,592		1,610,186
ServiceNow, Inc. (a)		3,655		2,875,279
TE Connectivity Ltd.		2,155		324,177
Texas Instruments, Inc.		15,186		2,954,133
Western Digital Corp. (a)		4,009		303,762
				103,768,260
Materials — 2.1%
Dow, Inc.		26,878		1,425,878
Eastman Chemical Co.		3,201		313,602
Linde PLC (LIN US)		6,288		2,759,237
LyondellBasell Industries NV Class A		8,376		801,248
Martin Marietta Materials, Inc.		778		421,521
Nucor Corp.		2,534		400,575
PPG Industries, Inc.		3,353		422,109
				6,544,170
Real Estate — 2.0%
Digital Realty Trust, Inc.		7,686		1,168,656
Equity LifeStyle Properties, Inc.		10,440		679,957
Prologis, Inc.		16,295		1,830,091
SBA Communications Corp.		4,860		954,018
Ventas, Inc.		21,335		1,093,632
Welltower, Inc.		6,906		719,951
				6,446,305
Utilities — 2.3%
CMS Energy Corp.		11,437		680,845
NextEra Energy, Inc.		31,436		2,225,983
NRG Energy, Inc.		1,603		124,810
PG&E Corp.		86,764		1,514,899
Southern Co.		34,288		2,659,720
Vistra Corp.		2,380		204,632
				7,410,889
TOTAL COMMON STOCK (Cost $221,422,543)				321,747,221
TOTAL EQUITIES (Cost $221,422,543)				321,747,221
RIGHTS — 0.0%
Health Care — 0.0%
Tobira Therapeutics Inc., CVR (a) (b) (c)		505		—
TOTAL RIGHTS (Cost $30)				—
TOTAL LONG-TERM INVESTMENTS (Cost $221,422,573)				321,747,221

MM Equity Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
SHORT-TERM INVESTMENTS — 0.6%
Repurchase Agreement — 0.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/28/24, 1.600%, due 7/01/24 (d)	$	1,891,240	$	1,891,240
TOTAL SHORT-TERM INVESTMENTS (Cost $1,891,240)				1,891,240
TOTAL INVESTMENTS — 102.5% (Cost $223,313,813) (e)				323,638,461
Other Assets/(Liabilities) — (2.5)%				(7,958,819)
NET ASSETS — 100.0%			$	315,679,642

Abbreviation Legend

CVR Contingent Value Rights

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Non-income producing security.

(b) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At June 30, 2024, these securities amounted to a value of $0 or 0.00% of net assets.

(c) Investment is valued using significant unobservable inputs.

(d) Maturity value of $1,891,492. Collateralized by U.S. Government Agency obligations with a rate of 4.500%, maturity date of 3/31/26, and an aggregate market value, including accrued interest, of $1,929,235.

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

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/Net Unrealized Appreciation (Depreciation)
Long
S&P 500 E Mini Index	9/20/24		7	$	1,926,027	$	6,498

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 98.3%
BANK LOANS — 1.5%
Advertising — 0.1%
Lamar Media Corp., 2020 Term Loan B, 1 mo. USD Term SOFR + 1.500%
6.944% VRN 2/05/27	$	305,000	$	304,366
Aerospace & Defense — 0.0%
TransDigm, Inc., 2024 Term Loan K, 3 mo. USD Term SOFR + 2.750%
8.085% VRN 3/22/30		117,704		117,892
Airlines — 0.0%
American Airlines, Inc., 2021 Term Loan, 3 mo. USD Term SOFR + 4.750%
10.336% VRN 4/20/28		68,000		70,160
Mileage Plus Holdings LLC, 2020 Term Loan B, 3 mo. USD Term SOFR + 5.250%
10.744% VRN 6/21/27		61,895		63,098
				133,258
Building Materials — 0.0%
Summit Materials LLC, 2023 Incremental Term Loan B, 3 mo. USD Term SOFR + 2.500%
7.799% VRN 1/12/29		155,000		155,969
Commercial Services — 0.1%
GTCR W Merger Sub LLC, USD Term Loan B, 3 mo. USD Term SOFR + 3.000%
8.335% VRN 1/31/31		220,000		219,969
Diversified Financial Services — 0.1%
Citadel Securities LP, 2024 Term Loan B, 1 mo. USD Term SOFR + 2.250%
7.594% VRN 7/29/30		421,003		422,055
Electric — 0.1%
NRG Energy, Inc., 2024 Term Loan, 1 mo. USD Term SOFR + 2.000%
7.344% VRN 4/16/31		329,175		329,010
Vistra Zero Operating Company LLC, Term Loan B, 1 mo. USD Term SOFR + 2.750%
8.094% VRN 4/30/31		39,900		40,060
				369,070
Entertainment — 0.1%
Caesars Entertainment, Inc., 2024 Term Loan B1, 3 mo. USD Term SOFR + 2.750%
8.097% VRN 2/06/31		65,000		64,939
Delta 2 (LUX) SARL, 2022 Term Loan B, 3 mo. USD Term SOFR + 2.250%
7.585% VRN 1/15/30		240,000		240,350

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
UFC Holdings LLC, 2021 Term Loan B, 3 mo. USD Term SOFR + 2.750%
8.336% VRN 4/29/26	$	263,786	$	264,266
				569,555
Environmental Controls — 0.1%
Filtration Group Corp., 2021 Incremental Term Loan, 1 mo. USD Term SOFR + 3.500%
8.958% VRN 10/21/28		390,335		391,982
Health Care - Products — 0.0%
Medline Borrower LP, 2024 Term Loan B, 1 mo. USD Term SOFR + 2.750%
8.094% VRN 10/23/28		194,072		194,332
Health Care - Services — 0.2%
ICON Luxembourg SARL, 2024 LUX Term Loan B, 3 mo. USD Term SOFR + 2.000%
7.335% VRN 7/03/28		8,910		8,936
IQVIA, Inc., 2023 USD Term Loan B4, 3 mo. USD Term SOFR + 2.000%
7.335% VRN 1/02/31		1,139,275		1,143,012
PRA Health Sciences, Inc., 2024 US Term Loan B, 3 mo. USD Term SOFR + 2.000%
7.335% VRN 7/03/28		2,255		2,261
				1,154,209
Insurance — 0.3%
Assured Partners, Inc., 2024 Incremental Term Loan B5, 1 mo. USD Term SOFR + 3.500%
8.844% VRN 2/14/31		224,438		224,889
Asurion LLC
2023 Term Loan B11, 1 mo. USD Term SOFR + 4.250%
9.694% VRN 8/19/28		148,528		147,249
2021 2nd Lien Term Loan B3, 1 mo. USD Term SOFR + 5.250%
10.708% VRN 1/31/28		15,338		14,229
2021 Second Lien Term Loan B4, 1 mo. USD Term SOFR + 5.250%
10.708% VRN 1/20/29		150,000		137,953
HUB International Ltd., 2024 Term Loan B, 3 mo. USD Term SOFR + 3.250%
8.575% VRN 6/20/30		407,014		407,726
Truist Insurance Holdings LLC, 1st Lien Term Loan, 3 mo. USD Term SOFR + 3.250%
8.585% VRN 5/06/31		390,000		390,347
				1,322,393
Internet — 0.0%
Gen Digital, Inc., 2021 Term Loan A, 1 mo. USD Term SOFR + 1.500%
6.944% VRN 9/10/27		120,250		120,062
Investment Companies — 0.0%
WEC US Holdings Ltd., 2024 Term Loan, 1 mo. USD Term SOFR + 2.750%
8.094% VRN 1/27/31		135,145		135,174
Lodging — 0.1%
Hilton Domestic Operating Co., Inc., 2023 Term Loan B4, 1 mo. USD Term SOFR + 1.750%
7.095% VRN 11/08/30		440,000		440,304

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Packaging & Containers — 0.0%
Charter NEX US, Inc., 2024 Term Loan B, 1 mo. USD Term SOFR + 3.500%
8.844% VRN 12/01/27	$	204,212	$	204,433
Software — 0.3%
Applied Systems, Inc.
2024 1st Lien Term Loan, 3 mo. USD Term SOFR + 3.500%
8.835% VRN 2/24/31		478,611		481,846
2024 2nd Lien Term Loan, 3 mo. USD Term SOFR + 5.250%
10.585% VRN 2/23/32		5,000		5,163
Ascend Learning LLC, 2021 Term Loan, 1 mo. USD Term SOFR + 3.500%
8.944% VRN 12/11/28		96,384		96,246
Athenahealth Group, Inc., 2022 Term Loan B, 1 mo. USD Term SOFR + 3.250%
8.594% VRN 2/15/29		96,113		95,693
Banff Merger Sub, Inc., 2023 USD Term Loan, 1 mo. USD Term SOFR + 4.250%
9.344% VRN 12/29/28		114,330		114,431
Epicor Software Corp., 2024 Term Loan, 1 mo. USD Term SOFR + 3.250%
8.578% VRN 5/23/31 (a)		233,394		234,236
UKG, Inc., 2024 Term Loan B, 1 mo. USD Term SOFR + 3.250%
8.576% VRN 2/10/31		611,898		613,886
				1,641,501
TOTAL BANK LOANS (Cost $7,889,898)				7,896,524
CORPORATE DEBT — 26.5%
Advertising — 0.0%
Interpublic Group of Cos., Inc.
4.650% 10/01/28		183,000		178,974
Aerospace & Defense — 0.4%
BAE Systems PLC
5.300% 3/26/34 (b)		305,000		302,196
Boeing Co.
3.250% 2/01/28		84,000		76,927
3.750% 2/01/50		122,000		79,832
5.040% 5/01/27		536,000		524,190
6.388% 5/01/31 (b)		209,000		212,774
6.528% 5/01/34 (b)		476,000		487,376
TransDigm, Inc.
6.875% 12/15/30 (b)		126,000		128,627
7.125% 12/01/31 (b)		220,000		226,683
				2,038,605
Agriculture — 0.2%
BAT Capital Corp.
2.259% 3/25/28		131,000		117,372
6.000% 2/20/34		212,000		214,468
6.343% 8/02/30		73,000		76,105
7.079% 8/02/43		183,000		192,838
7.081% 8/02/53		395,000		420,026

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Philip Morris International, Inc.
5.125% 2/15/30	$	238,000	$	237,144
				1,257,953
Apparel — 0.1%
VF Corp.
4.125% 3/07/26 EUR (c)		112,000		118,515
4.250% 3/07/29 EUR (c)		115,000		118,416
2.950% 4/23/30 (d)		390,000		323,722
				560,653
Auto Manufacturers — 0.7%
American Honda Finance Corp.
0.750% 11/25/26 GBP (c)		130,000		149,370
1.950% 10/18/24 EUR (c)		200,000		212,938
Daimler Truck Finance North America LLC
5.375% 1/18/34 (b)		150,000		148,479
Ford Motor Co.
9.625% 4/22/30		136,000		158,241
Ford Motor Credit Co. LLC
4.867% 8/03/27 EUR (c)		271,000		297,574
4.950% 5/28/27		265,000		258,670
5.125% 2/20/29 EUR (c)		110,000		122,304
6.798% 11/07/28		200,000		206,659
7.122% 11/07/33		200,000		211,335
7.350% 11/04/27		200,000		208,399
General Motors Financial Co., Inc.
0.850% 2/26/26 EUR (b) (c)		150,000		153,480
5.550% 7/15/29		306,000		305,989
5.800% 6/23/28		152,000		153,862
Hyundai Capital America
5.350% 3/19/29 (b)		136,000		135,786
5.400% 1/08/31 (b)		76,000		75,499
5.500% 3/30/26 (b)		115,000		114,879
6.500% 1/16/29 (b)		157,000		163,946
Rivian Holdings LLC/Rivian LLC/Rivian Automotive LLC 6 mo. USD SOFR + 6.028%
11.310% FRN 10/15/26 (b)		220,000		221,924
Volkswagen Bank GmbH
4.375% 5/03/28 EUR (b) (c)		100,000		109,297
Volkswagen Financial Services AG
0.375% 2/12/30 EUR (b) (c)		140,000		124,657
Volkswagen Leasing GmbH
1.625% 8/15/25 EUR (b) (c)		150,000		156,999
				3,690,287
Auto Parts & Equipment — 0.1%
Clarios Global LP/Clarios US Finance Co.
6.750% 5/15/28 (b)		123,000		124,483
Dana Financing Luxembourg SARL
8.500% 7/15/31 EUR (b) (c)		100,000		116,587
ZF North America Capital, Inc.
7.125% 4/14/30 (b)		150,000		155,305
6.750% 4/23/30 (b)		150,000		152,766

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
6.875% 4/23/32 (b)	$	150,000	$	155,078
				704,219
Banks — 6.2%
Banca Transilvania SA 1 yr. EURIBOR ICE Swap + 5.580%
8.875% VRN 4/27/27 EUR (b) (c)		300,000		338,634
Banco Bilbao Vizcaya Argentaria SA 5 yr. EURIBOR ICE Swap + 2.800%
5.750% VRN 9/15/33 EUR (b) (c)		100,000		111,704
Banco Comercial Portugues SA 3 mo. EURIBOR + 2.000%
1.750% VRN 4/07/28 EUR (b) (c)		100,000		100,937
Banco de Sabadell SA
1 yr. EURIBOR ICE Swap + 1.150% 0.875% VRN 6/16/28 EUR (b) (c)		200,000		196,898
1 yr. EUR Swap + 2.000% 5.000% VRN 6/07/29 EUR (b) (c)		100,000		111,808
1 yr. EUR Swap + 2.250% 5.125% VRN 11/10/28 EUR (b) (c)		100,000		111,649
Banco Santander SA
1.125% 1/17/25 EUR (b) (c)		200,000		211,067
2.746% 5/28/25		1,000,000		974,032
Bank of America Corp.
3 mo. EURIBOR + 0.890% 1.662% VRN 4/25/28 EUR (b) (c)		100,000		101,785
1 day USD SOFR + 1.530% 1.898% VRN 7/23/31		1,070,000		881,349
1 day USD SOFR + 1.220% 2.299% VRN 7/21/32		361,000		295,524
3 mo. USD Term SOFR + 1.252% 2.496% VRN 2/13/31		1,475,000		1,274,915
1 day USD SOFR + 1.570% 5.819% VRN 9/15/29		1,130,000		1,153,656
Bank of New York Mellon Corp.
1 day USD SOFR + 1.418% 5.188% VRN 3/14/35		361,000		356,333
1 day USD SOFR + 1.845% 6.474% VRN 10/25/34		434,000		468,068
Banque Federative du Credit Mutuel SA
1.250% 5/26/27 EUR (b) (c)		100,000		100,289
3.125% 9/14/27 EUR (b) (c)		100,000		105,445
5.125% 1/13/33 EUR (b) (c)		100,000		111,645
Barclays PLC
1 yr. EUR Swap + 1.260% 0.577% VRN 8/09/29 EUR (b) (c)		215,000		201,696
1 yr. EURIBOR ICE Swap + 0.850% 0.877% VRN 1/28/28 EUR (b) (c)		100,000		99,595
1 yr. CMT + 2.300% 5.304% VRN 8/09/26		202,000		200,661
1 yr. CMT + 2.650% 5.501% VRN 8/09/28		225,000		224,577
1 day USD SOFR + 1.740% 5.690% VRN 3/12/30		395,000		396,059
1 yr. U.K. Government Bond + 2.800% 6.369% VRN 1/31/31 GBP (b) (c)		125,000		162,794
BBVA Bancomer SA 5 yr. CMT + 2.650%
5.125% VRN 1/18/33 (b)		300,000		273,392
BNP Paribas SA 3 mo. EURIBOR + 1.800%
2.125% VRN 1/23/27 EUR (b) (c)		200,000		208,448
BPCE SA
0.250% 1/14/31 EUR (b) (c)		200,000		172,088
CaixaBank SA
3 mo. EURIBOR + 1.000% 0.750% VRN 5/26/28 EUR (b) (c)		100,000		98,774
3.750% 9/07/29 EUR (b) (c)		200,000		217,191
1 day USD SOFR + 2.260% 6.037% VRN 6/15/35 (b)		490,000		490,995
1 day USD SOFR + 2.700% 6.208% VRN 1/18/29 (b)		500,000		507,872
5 yr. EUR Swap + 3.550% 6.250% VRN 2/23/33 EUR (b) (c)		100,000		112,659
1 day USD SOFR + 2.080% 6.684% VRN 9/13/27 (b)		420,000		428,020
Citigroup, Inc.
1 day USD SOFR + 1.167% 2.561% VRN 5/01/32		255,000		212,506
1 day USD SOFR + 2.842% 3.106% VRN 4/08/26		204,000		199,861
4.450% 9/29/27		119,000		115,993
1 day USD SOFR + 2.056% 5.827% VRN 2/13/35		1,373,000		1,358,704
Cooperatieve Rabobank UA
4.625% 5/23/29 GBP (b) (c)		150,000		181,635
Credit Agricole SA

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
0.875% 1/14/32 EUR (b) (c)	$	200,000	$	172,589
1.000% 9/16/24 EUR (b) (c)		200,000		212,892
Danske Bank AS
1 yr. EURIBOR ICE Swap + 0.880% 0.750% VRN 6/09/29 EUR (b) (c)		100,000		95,278
1 yr. EUR Swap + 0.850% 1.375% VRN 2/17/27 EUR (b) (c)		110,000		113,183
5 yr. EUR Swap + 1.700% 1.375% VRN 2/12/30 EUR (b) (c)		100,000		105,076
3 mo. USD LIBOR + 1.591% 3.244% VRN 12/20/25 (b)		840,000		828,874
1 yr. EUR Swap + 1.350% 4.500% VRN 11/09/28 EUR (b) (c)		100,000		109,310
1 yr. CMT + 1.400% 5.705% VRN 3/01/30 (b)		335,000		335,934
Deutsche Bank AG 1 day USD SOFR + 2.581%
3.961% VRN 11/26/25		320,000		317,267
Fifth Third Bancorp
2.375% 1/28/25		76,000		74,520
2.550% 5/05/27		42,000		38,898
3.950% 3/14/28		131,000		125,044
1 day USD SOFR + 1.840% 5.631% VRN 1/29/32		128,000		126,885
1 day USD SOFR + 2.340% 6.339% VRN 7/27/29		277,000		283,949
Goldman Sachs Group, Inc.
1.625% 7/27/26 EUR (b) (c)		140,000		144,341
1 day USD SOFR + 1.248% 2.383% VRN 7/21/32		433,000		355,593
1 day USD SOFR + 1.846% 3.615% VRN 3/15/28		467,000		446,534
1 yr. U.K. Government Bond + 1.950% 3.625% VRN 10/29/29 GBP (b) (c)		85,000		100,851
3 mo. USD Term SOFR + 1.772% 3.691% VRN 6/05/28		162,000		154,973
1 day USD SOFR + 1.725% 4.482% VRN 8/23/28		442,000		431,973
HSBC Holdings PLC 3 mo. EURIBOR + 1.290%
4.752% VRN 3/10/28 EUR (b) (c)		140,000		153,557
Huntington National Bank 1 day USD SOFR + 1.215%
5.699% VRN 11/18/25		250,000		249,619
ING Groep NV
3 mo. EURIBOR + 0.700% 0.375% VRN 9/29/28 EUR (b) (c)		100,000		96,321
3 mo. EURIBOR + 0.850% 1.250% VRN 2/16/27 EUR (b) (c)		200,000		205,796
1 day USD SOFR + 2.090% 6.114% VRN 9/11/34		575,000		592,823
Intesa Sanpaolo SpA
1.000% 7/04/24 EUR (b) (c)		300,000		321,234
1.750% 7/04/29 EUR (b) (c)		100,000		97,702
JP Morgan Chase & Co.
3 mo. EURIBOR + 0.840% 1.638% VRN 5/18/28 EUR (b) (c)		100,000		101,487
3 mo. USD Term SOFR + 1.105% 1.764% VRN 11/19/31		811,000		659,705
1 day USD SOFR + 2.040% 2.522% VRN 4/22/31		141,000		121,870
3 mo. USD Term SOFR + 1.510% 2.739% VRN 10/15/30		225,000		199,078
3 mo. USD Term SOFR + 2.515% 2.956% VRN 5/13/31		991,000		868,531
1 day USD SOFR + 1.190% 5.040% VRN 1/23/28		230,000		228,755
1 day USD SOFR + 1.620% 5.336% VRN 1/23/35		212,000		210,733
Kreditanstalt fuer Wiederaufbau
4.700% 6/02/37 CAD (c)		65,000		48,857
4.700% 6/02/37 CAD (c)		75,000		56,374
Landsbankinn Hf.
0.375% 5/23/25 EUR (b) (c)		265,000		274,031
Morgan Stanley
3 mo. EURIBOR + 0.698% 0.406% VRN 10/29/27 EUR (c)		100,000		99,438
1 day USD SOFR + 0.858% 1.512% VRN 7/20/27		535,000		494,610
1 day USD SOFR + 1.730% 5.123% VRN 2/01/29		748,000		745,043
3 mo. EURIBOR + 1.954% 5.148% VRN 1/25/34 EUR (c)		100,000		116,126
1 day USD SOFR + 1.450% 5.173% VRN 1/16/30		357,000		356,115
Nationale-Nederlanden Bank NV
0.375% 2/26/25 EUR (b) (c)		100,000		104,684
NatWest Group PLC 5 yr. EUR Swap + 1.270%
1.043% VRN 9/14/32 EUR (b) (c)		135,000		130,201

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
OTP Bank Nyrt 3 mo. EURIBOR + 4.523%
7.350% VRN 3/04/26 EUR (b) (c)	$	140,000	$	152,214
PNC Financial Services Group, Inc.
1 day USD SOFR + 1.342% 5.300% VRN 1/21/28		118,000		117,838
1 day USD SOFR + 2.284% 6.875% VRN 10/20/34		293,000		319,331
QNB Finance Ltd.
2.750% 2/12/27 (b)		200,000		187,659
4.875% 1/30/29 (b)		200,000		197,250
Royal Bank of Canada
4.125% 7/05/28 EUR (b) (c)		100,000		109,374
Santander Holdings USA, Inc.
1 day USD SOFR + 1.232% 6.124% VRN 5/31/27		105,000		105,434
1 day USD SOFR + 2.138% 6.342% VRN 5/31/35		520,000		518,508
Santander UK Group Holdings PLC
1 yr. EUR Swap + 0.800% 0.603% VRN 9/13/29 EUR (b) (c)		275,000		256,904
1 yr. CMT + 1.250% 1.532% VRN 8/21/26		1,265,000		1,203,895
1 yr. GBP SONIA Linked ICE Swap + 1.250% 2.421% VRN 1/17/29 GBP (b) (c)		100,000		113,817
Shinhan Bank Co. Ltd.
4.500% 4/12/28 (b)		330,000		325,043
Societe Generale SA 1 yr. CMT + 1.500%
5.519% VRN 1/19/28 (b)		740,000		730,676
Standard Chartered PLC
1 yr. CMT + 1.000% 1.456% VRN 1/14/27 (b)		295,000		276,310
5 yr. EUR Swap + 2.800% 2.500% VRN 9/09/30 EUR (b) (c)		180,000		188,944
1 yr. CMT + 1.450% 5.905% VRN 5/14/35 (b)		615,000		609,581
Toronto-Dominion Bank
2.551% 8/03/27 EUR (b) (c)		100,000		103,856
UBS Group AG
1 day USD SOFR Index + 0.980% 1.305% VRN 2/02/27 (b)		340,000		316,982
1 yr. GBP Swap + 1.230% 2.125% VRN 9/12/25 GBP (b) (c)		250,000		313,818
1 yr. EUR Swap + 1.950% 2.875% VRN 4/02/32 EUR (b) (c)		185,000		185,257
1 day USD SOFR + 1.730% 3.091% VRN 5/14/32 (b)		550,000		469,153
1 day USD SOFR + 3.920% 6.537% VRN 8/12/33 (b)		825,000		865,745
1 yr. EURIBOR ICE Swap + 4.950% 7.750% VRN 3/01/29 EUR (b) (c)		100,000		120,968
US Bancorp
1 day USD SOFR + 1.560% 5.384% VRN 1/23/30		157,000		157,421
1 day USD SOFR + 1.860% 5.678% VRN 1/23/35		599,000		601,297
Wells Fargo & Co.
3 mo. USD Term SOFR + 1.262% 2.572% VRN 2/11/31		914,000		791,040
1 day USD SOFR + 1.500% 5.198% VRN 1/23/30		467,000		465,039
				33,779,266
Beverages — 0.1%
Anheuser-Busch InBev SA
1.150% 1/22/27 EUR (b) (c)		100,000		101,548
1.650% 3/28/31 EUR (b) (c)		165,000		159,302
Anheuser-Busch InBev Worldwide, Inc.
5.550% 1/23/49		340,000		342,542
Carlsberg Breweries AS
0.375% 6/30/27 EUR (b) (c)		100,000		97,645
				701,037
Building Materials — 0.1%
Holcim Finance Luxembourg SA
2.250% 5/26/28 EUR (b) (c)		100,000		102,282
Owens Corning

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
5.700% 6/15/34	$	215,000	$	216,979
5.950% 6/15/54		220,000		221,758
				541,019
Chemicals — 0.2%
Braskem Netherlands Finance BV
4.500% 1/31/30 (b)		300,000		253,671
MEGlobal BV
2.625% 4/28/28 (b)		200,000		179,700
2.625% 4/28/28 (b)		200,000		179,700
Westlake Corp.
1.625% 7/17/29 EUR (c)		735,000		707,676
				1,320,747
Commercial Services — 0.4%
Albion Financing 1 SARL/Aggreko Holdings, Inc.
5.250% 10/15/26 EUR (b) (c)		100,000		107,350
Autostrade per l'Italia SpA
1.625% 1/25/28 EUR (b) (c)		100,000		98,738
2.000% 12/04/28 EUR (b) (c)		165,000		162,818
2.000% 1/15/30 EUR (b) (c)		625,000		599,344
Boost Newco Borrower LLC
7.500% 1/15/31 (b)		200,000		208,531
GTCR W Dutch Finance Sub BV
8.500% 1/15/31 GBP (b) (c)		100,000		135,455
Holding d'Infrastructures de Transport SASU
1.475% 1/18/31 EUR (b) (c)		200,000		182,974
Loxam SAS
6.375% 5/15/28 EUR (b) (c)		100,000		110,058
Transurban Finance Co. Pty. Ltd.
1.750% 3/29/28 EUR (b) (c)		100,000		100,220
3.000% 4/08/30 EUR (b) (c)		300,000		308,492
Verisure Holding AB
3.875% 7/15/26 EUR (b) (c)		100,000		105,756
Wolters Kluwer NV
1.500% 3/22/27 EUR (b) (c)		100,000		101,967
				2,221,703
Computers — 0.0%
Booz Allen Hamilton, Inc.
5.950% 8/04/33		162,000		167,090
Distribution & Wholesale — 0.0%
Ritchie Bros Holdings, Inc.
7.750% 3/15/31 (b)		15,000		15,665
Diversified Financial Services — 0.9%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust
3.300% 1/30/32		570,000		489,753
5.100% 1/19/29		215,000		212,937
CA Auto Bank SpA
0.500% 9/13/24 EUR (b) (c)		160,000		170,166
4.750% 1/25/27 EUR (b) (c)		100,000		109,627
Capital One Financial Corp.
1.650% 6/12/29 EUR (c)		300,000		285,570
1 day USD SOFR + 1.337% 2.359% VRN 7/29/32		115,000		89,840
1 day USD SOFR + 1.790% 3.273% VRN 3/01/30		225,000		203,096

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3.750% 3/09/27	$	178,000	$	170,956
1 day USD SOFR + 2.160% 4.985% VRN 7/24/26		447,000		443,114
1 day USD SOFR + 2.600% 5.247% VRN 7/26/30		118,000		115,926
1 day USD SOFR + 1.905% 5.700% VRN 2/01/30		80,000		80,380
1 day USD SOFR + 2.260% 6.051% VRN 2/01/35		220,000		221,278
1 day USD SOFR + 3.070% 7.624% VRN 10/30/31		73,000		80,363
Encore Capital Group, Inc.
5.375% 2/15/26 GBP (b) (c)		140,000		174,319
Intercontinental Exchange, Inc.
2.650% 9/15/40		110,000		76,181
Jane Street Group/JSG Finance, Inc.
7.125% 4/30/31 (b)		325,000		333,279
Jerrold Finco PLC
5.250% 1/15/27 GBP (b) (c)		100,000		122,618
Kane Bidco Ltd.
5.000% 2/15/27 EUR (b) (c)		225,000		237,930
London Stock Exchange Group PLC
1.750% 12/06/27 EUR (b) (c)		100,000		101,326
Lseg US Fin Corp.
5.297% 3/28/34 (b)		340,000		339,086
LSEGA Financing PLC
2.500% 4/06/31 (b)		435,000		366,754
Navient Corp.
9.375% 7/25/30		160,000		168,236
11.500% 3/15/31		130,000		143,185
OneMain Finance Corp.
9.000% 1/15/29		300,000		316,507
				5,052,427
Electric — 2.8%
American Electric Power Co., Inc.
5.200% 1/15/29		170,000		169,083
Appalachian Power Co.
5.650% 4/01/34		51,000		50,496
AusNet Services Holdings Pty. Ltd.
1.500% 2/26/27 EUR (b) (c)		100,000		101,431
Baltimore Gas & Electric Co.
5.400% 6/01/53		170,000		162,168
Constellation Energy Generation LLC
5.750% 3/15/54		330,000		319,811
DTE Energy Co.
4.875% 6/01/28		76,000		74,806
5.100% 3/01/29		544,000		539,549
Duke Energy Corp.
3.750% 4/01/31 EUR (c)		230,000		242,932
5.000% 8/15/52		447,000		388,323
6.100% 9/15/53		505,000		512,533
E.ON International Finance BV
6.250% 6/03/30 GBP (b) (c)		305,000		406,397
Edison International
6.950% 11/15/29		72,000		76,549
EDP - Energias de Portugal SA
2.875% 6/01/26 EUR (b) (c)		200,000		211,713
Electricite de France SA
6.125% 6/02/34 GBP (b) (c)		200,000		257,078
Enel Finance International NV
5.625% 8/14/24 GBP (b) (c)		150,000		189,599
Engie SA

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
5.250% 4/10/29 (b)	$	200,000	$	199,398
5.625% 4/10/34 (b)		220,000		218,857
Eversource Energy
5.850% 4/15/31		311,000		314,880
5.950% 7/15/34		591,000		596,119
Exelon Corp.
5.450% 3/15/34		204,000		202,549
5.600% 3/15/53		612,000		587,975
FirstEnergy Corp.
2.250% 9/01/30		68,000		56,920
2.650% 3/01/30		368,000		319,884
3.400% 3/01/50		466,000		311,710
Georgia Power Co.
4.950% 5/17/33		382,000		372,454
5.250% 3/15/34		264,000		263,167
Indianapolis Power & Light Co.
5.700% 4/01/54 (b)		128,000		125,250
Interchile SA
4.500% 6/30/56 (b)		280,000		235,301
IPALCO Enterprises, Inc.
5.750% 4/01/34 (b)		220,000		218,361
MidAmerican Energy Co.
5.850% 9/15/54		149,000		152,577
National Grid Electricity Distribution East Midlands PLC
3.530% 9/20/28 EUR (b) (c)		100,000		106,506
NextEra Energy Capital Holdings, Inc.
2.440% 1/15/32		369,000		302,519
Niagara Mohawk Power Corp.
5.664% 1/17/54 (b)		217,000		208,248
NRG Energy, Inc.
4.450% 6/15/29 (b)		144,000		135,970
Orsted AS
4.875% 1/12/32 GBP (b) (c)		150,000		185,815
Pacific Gas & Electric Co.
2.100% 8/01/27		325,000		293,239
2.500% 2/01/31		395,000		325,605
4.550% 7/01/30		514,000		487,091
5.800% 5/15/34		298,000		296,107
6.700% 4/01/53		123,000		127,989
6.750% 1/15/53		311,000		322,800
6.950% 3/15/34		225,000		242,263
PacifiCorp
5.300% 2/15/31		306,000		305,012
Palomino Funding Trust I
7.233% 5/17/28 (b)		290,000		304,384
RTE Reseau de Transport d'Electricite SADIR
0.750% 1/12/34 EUR (b) (c)		200,000		166,401
Sempra
3.400% 2/01/28		81,000		76,174
3.700% 4/01/29		123,000		115,200
Southern California Edison Co.
5.450% 6/01/31		110,000		110,786
5.700% 3/01/53		187,000		181,146
Southern Co.
5.200% 6/15/33		565,000		554,698
5.700% 3/15/34		502,000		510,377
Southwestern Public Service Co.
6.000% 6/01/54		130,000		129,620

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
State Grid Overseas Investment BVI Ltd.
1.375% 5/02/25 EUR (b) (c)	$	100,000	$	104,840
Talen Energy Supply LLC
8.625% 6/01/30 (b)		300,000		319,867
Vistra Corp.
5 yr. CMT + 6.930% 8.000% VRN (b) (e)		355,000		358,018
5 yr. CMT + 5.045% 8.875% VRN (b) (e)		390,000		403,294
Vistra Operations Co. LLC
6.000% 4/15/34 (b)		141,000		141,337
6.950% 10/15/33 (b)		162,000		173,386
7.750% 10/15/31 (b)		215,000		223,899
				15,090,461
Engineering & Construction — 0.3%
ABB Finance BV
3.250% 1/16/27 EUR (b) (c)		100,000		107,300
3.375% 1/16/31 EUR (b) (c)		115,000		123,138
Avinor AS
0.750% 10/01/30 EUR (b) (c)		140,000		127,906
Cellnex Telecom SA
1.750% 10/23/30 EUR (b) (c)		800,000		751,239
Heathrow Funding Ltd.
2.750% 10/13/31 GBP (b) (c)		225,000		253,849
HTA Group Ltd.
7.500% 6/04/29 (b)		200,000		198,800
Sydney Airport Finance Co. Pty. Ltd.
4.375% 5/03/33 EUR (b) (c)		220,000		243,583
				1,805,815
Entertainment — 0.3%
Banijay Entertainment SASU
7.000% 5/01/29 EUR (b) (c)		100,000		111,647
Caesars Entertainment, Inc.
7.000% 2/15/30 (b)		155,000		158,361
Cirsa Finance International SARL
7.875% 7/31/28 EUR (b) (c)		120,000		135,904
Inter Media & Communication SpA
6.750% 2/09/27 EUR (b) (c)		145,000		152,958
Motion Finco SARL
7.375% 6/15/30 EUR (b) (c)		170,000		189,344
Six Flags Entertainment Corp./Six Flags Theme Parks, Inc.
6.625% 5/01/32 (b)		190,000		193,085
Warnermedia Holdings, Inc.
3.755% 3/15/27		534,000		506,990
				1,448,289
Food — 0.2%
Bimbo Bakeries USA, Inc.
6.050% 1/15/29 (b)		225,000		231,261
6.400% 1/15/34 (b)		200,000		211,440
Mars, Inc.
4.750% 4/20/33 (b)		374,000		362,862
Mondelez International, Inc.
1.625% 3/08/27 EUR (c)		100,000		102,136

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Tesco Corporate Treasury Services PLC
2.750% 4/27/30 GBP (b) (c)	$	150,000	$	168,265
				1,075,964
Forest Products & Paper — 0.0%
Mondi Finance Europe GmbH
2.375% 4/01/28 EUR (b) (c)		100,000		102,536
Gas — 0.1%
APA Infrastructure Ltd.
2.000% 3/22/27 EUR (b) (c)		100,000		102,222
3.500% 3/22/30 GBP (b) (c)		150,000		170,615
Boston Gas Co.
6.119% 7/20/53 (b)		131,000		129,489
NiSource, Inc.
5.250% 3/30/28		73,000		72,921
Snam SpA
0.875% 10/25/26 EUR (b) (c)		185,000		186,244
				661,491
Hand & Machine Tools — 0.0%
IMA Industria Macchine Automatiche SpA 3 mo. EURIBOR + 3.750%
7.652% FRN 4/15/29 EUR (b) (c)		100,000		107,888
Stanley Black & Decker, Inc.
2.750% 11/15/50		215,000		123,092
				230,980
Health Care - Products — 0.6%
Becton Dickinson Euro Finance SARL
1.213% 2/12/36 EUR (c)		100,000		80,659
Medline Borrower LP/Medline Co.-Issuer, Inc.
6.250% 4/01/29 (b)		287,000		290,248
Medtronic Global Holdings SCA
0.375% 10/15/28 EUR (c)		100,000		94,401
Revvity, Inc.
1.900% 9/15/28		348,000		304,430
2.250% 9/15/31		186,000		152,191
3.300% 9/15/29		191,000		173,836
Sartorius Finance BV
4.500% 9/14/32 EUR (b) (c)		200,000		220,089
4.875% 9/14/35 EUR (b) (c)		300,000		333,960
Solventum Corp.
5.400% 3/01/29 (b)		369,000		367,874
5.600% 3/23/34 (b)		450,000		441,979
5.900% 4/30/54 (b)		390,000		372,785
6.000% 5/15/64 (b)		390,000		369,912
Thermo Fisher Scientific, Inc.
0.875% 10/01/31 EUR (c)		140,000		125,989
2.375% 4/15/32 EUR (c)		100,000		99,185
				3,427,538
Health Care - Services — 1.4%
Centene Corp.
2.450% 7/15/28		196,000		174,015
2.625% 8/01/31		267,000		219,265
3.375% 2/15/30		437,000		387,887

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
4.250% 12/15/27	$	81,000	$	77,338
4.625% 12/15/29		824,000		779,360
Elevance Health, Inc.
5.125% 2/15/53		187,000		172,005
Fresenius SE & Co. KGaA
5.000% 11/28/29 EUR (b) (c)		100,000		112,813
HCA, Inc.
3.500% 9/01/30		509,000		459,137
Health Care Service Corp. A Mutual Legal Reserve Co.
5.200% 6/15/29 (b)		165,000		164,289
5.450% 6/15/34 (b)		215,000		212,484
5.875% 6/15/54 (b)		435,000		428,014
Humana, Inc.
4.875% 4/01/30		468,000		459,170
5.375% 4/15/31		353,000		351,126
5.750% 4/15/54		149,000		143,579
5.950% 3/15/34		220,000		224,895
Icon Investments Six DAC
5.849% 5/08/29		200,000		203,222
6.000% 5/08/34		200,000		204,314
IQVIA, Inc.
6.250% 2/01/29		322,000		330,949
Sutter Health
5.164% 8/15/33		119,000		119,317
UnitedHealth Group, Inc.
4.500% 4/15/33		356,000		340,226
5.000% 4/15/34		531,000		524,101
5.050% 4/15/53		728,000		674,303
5.875% 2/15/53		625,000		649,083
				7,410,892
Holding Company - Diversified — 0.0%
ProGroup AG
5.375% 4/15/31 EUR (b) (c)		70,000		74,427
Home Furnishing — 0.0%
Electrolux AB
4.500% 9/29/28 EUR (b) (c)		100,000		108,821
Household Products & Wares — 0.0%
Reckitt Benckiser Treasury Services PLC
3.875% 9/14/33 EUR (b) (c)		145,000		156,032
Insurance — 0.9%
Alliant Holdings Intermediate LLC/Alliant Holdings Co-Issuer
6.750% 4/15/28 (b)		295,000		295,468
7.000% 1/15/31 (b)		70,000		70,716
Allianz SE 10 yr. EURIBOR ICE Swap + 3.200%
3.375% VRN EUR (b) (c) (e)		200,000		213,129
AmWINS Group, Inc.
6.375% 2/15/29 (b)		150,000		150,409
Aon Corp.
2.800% 5/15/30		123,000		107,810
Arthur J Gallagher & Co.
5.750% 7/15/54		70,000		67,974
6.750% 2/15/54		205,000		225,709
Athene Global Funding
0.832% 1/08/27 EUR (b) (c)		165,000		163,874

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
5.684% 2/23/26 (b)	$	539,000	$	540,222
Berkshire Hathaway Finance Corp.
1.500% 3/18/30 EUR (c)		167,000		161,417
CNO Financial Group, Inc.
5.250% 5/30/25		185,000		183,822
Corebridge Financial, Inc.
3.850% 4/05/29		81,000		75,916
3.900% 4/05/32		251,000		224,669
Corebridge Global Funding
5.200% 1/12/29 (b)		76,000		75,644
Credit Agricole Assurances SA 5 yr. EURIBOR ICE Swap + 2.650%
2.625% VRN 1/29/48 EUR (b) (c)		200,000		199,461
Hannover Rueck SE
1.125% 4/18/28 EUR (b) (c)		100,000		101,073
3 mo. EURIBOR + 2.380% 1.125% VRN 10/09/39 EUR (b) (c)		200,000		184,312
3 mo. EURIBOR + 3.000% 1.750% VRN 10/08/40 EUR (b) (c)		100,000		93,034
HUB International Ltd.
7.250% 6/15/30 (b)		385,000		394,675
Jackson Financial, Inc.
5.170% 6/08/27		340,000		338,926
Jones Deslauriers Insurance Management, Inc.
8.500% 3/15/30 (b)		217,000		226,303
Legal & General Group PLC 5 yr. U.K. Government Bond + 4.580%
5.375% VRN 10/27/45 GBP (b) (c)		185,000		231,543
Marsh & McLennan Cos., Inc.
5.700% 9/15/53		180,000		181,808
Metropolitan Life Global Funding I
5.000% 1/10/30 GBP (b) (c)		100,000		126,816
NN Group NV
1.625% 6/01/27 EUR (b) (c)		100,000		101,623
Panther Escrow Issuer LLC
7.125% 6/01/31 (b)		130,000		131,486
				4,867,839
Internet — 0.2%
Match Group Holdings II LLC
5.000% 12/15/27 (b)		128,000		122,706
MercadoLibre, Inc.
3.125% 1/14/31		200,000		169,436
Meta Platforms, Inc.
5.600% 5/15/53		565,000		576,676
Netflix, Inc.
3.625% 5/15/27 EUR (c)		100,000		107,594
3.875% 11/15/29 EUR (b) (c)		125,000		135,552
4.625% 5/15/29 EUR (c)		100,000		111,969
United Group BV
4.625% 8/15/28 EUR (b) (c)		100,000		103,266
				1,327,199
Investment Companies — 0.4%
Gaci First Investment Co.
4.875% 2/14/35 (b)		475,000		448,722
5.125% 2/14/53 (b)		785,000		679,692
Hannon Armstrong Sustainable Infrastructure Capital, Inc.
6.375% 7/01/34 (b)		880,000		861,477
				1,989,891

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Leisure Time — 0.2%
Carnival Corp.
7.000% 8/15/29 (b)	$	95,000	$	98,476
10.500% 6/01/30 (b)		285,000		309,598
Deuce Finco PLC
5.500% 6/15/27 GBP (b) (c)		100,000		120,813
Harley-Davidson Financial Services, Inc.
5.125% 4/05/26 EUR (b) (c)		210,000		229,442
Royal Caribbean Cruises Ltd.
8.250% 1/15/29 (b)		200,000		211,176
6.250% 3/15/32 (b)		90,000		90,756
				1,060,261
Lodging — 0.2%
Hilton Domestic Operating Co., Inc.
6.125% 4/01/32 (b)		130,000		130,631
Las Vegas Sands Corp.
3.500% 8/18/26		178,000		169,836
5.900% 6/01/27		89,000		89,472
MGM China Holdings Ltd.
7.125% 6/26/31 (b)		200,000		201,057
Wynn Macau Ltd.
5.500% 1/15/26 (b)		200,000		195,788
				786,784
Machinery - Diversified — 0.2%
AGCO Corp.
5.800% 3/21/34		102,000		101,602
Highland Holdings SARL
0.318% 12/15/26 EUR (c)		122,000		120,731
Ingersoll Rand, Inc.
5.314% 6/15/31		196,000		197,038
5.450% 6/15/34		162,000		163,405
5.700% 6/15/54		136,000		136,885
TK Elevator Midco GmbH
4.375% 7/15/27 EUR (b) (c)		100,000		103,224
				822,885
Media — 0.7%
Altice Financing SA
4.250% 8/15/29 EUR (b) (c)		100,000		81,044
CCO Holdings LLC/CCO Holdings Capital Corp.
4.250% 2/01/31 (b)		130,000		106,137
6.375% 9/01/29 (b)		75,000		71,290
7.375% 3/01/31 (b)		70,000		69,020
Charter Communications Operating LLC/Charter Communications Operating Capital
2.800% 4/01/31		502,000		410,294
3.750% 2/15/28		209,000		194,247
5.250% 4/01/53		536,000		420,504
6.484% 10/23/45		89,000		81,291
6.650% 2/01/34		471,000		475,777
Comcast Corp.
3.250% 11/01/39		251,000		193,162
5.650% 6/01/54		735,000		733,747
CSC Holdings LLC
11.750% 1/31/29 (b)		200,000		170,571

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
RCS & RDS SA
3.250% 2/05/28 EUR (b) (c)	$	200,000	$	199,841
Sirius XM Radio, Inc.
4.000% 7/15/28 (b)		130,000		117,436
5.000% 8/01/27 (b)		116,000		111,038
Summer BidCo BV
10.000% 2/15/29 EUR (b) (c)		102,986		110,477
VZ Secured Financing BV
3.500% 1/15/32 EUR (b) (c)		100,000		93,570
Walt Disney Co.
3.600% 1/13/51		217,000		161,737
Ziggo BV
2.875% 1/15/30 EUR (b) (c)		100,000		93,780
				3,894,963
Mining — 0.4%
Anglo American Capital PLC
3.375% 3/11/29 GBP (b) (c)		140,000		163,910
Corp. Nacional del Cobre de Chile
6.300% 9/08/53 (b)		620,000		614,406
6.300% 9/08/53 (b)		380,000		376,571
6.440% 1/26/36 (b)		270,000		278,727
Freeport Indonesia PT
4.763% 4/14/27 (b)		240,000		235,044
5.315% 4/14/32 (b)		505,000		489,727
Freeport-McMoRan, Inc.
4.375% 8/01/28		161,000		155,508
5.000% 9/01/27		38,000		37,575
				2,351,468
Miscellaneous - Manufacturing — 0.0%
Knorr-Bremse AG
3.250% 9/21/27 EUR (b) (c)		100,000		106,368
Oil & Gas — 1.4%
BP Capital Markets PLC
2.213% 9/25/26 EUR (b) (c)		160,000		167,058
Continental Resources, Inc.
4.375% 1/15/28		81,000		77,873
Diamondback Energy, Inc.
5.150% 1/30/30		136,000		135,424
5.400% 4/18/34		618,000		611,850
5.750% 4/18/54		252,000		244,299
5.900% 4/18/64		264,000		254,835
6.250% 3/15/53		186,000		191,420
Eni SpA
5.500% 5/15/34 (b)		360,000		356,688
5.950% 5/15/54 (b)		445,000		437,070
Hilcorp Energy I LP/Hilcorp Finance Co.
8.375% 11/01/33 (b)		239,000		254,716
Occidental Petroleum Corp.
6.125% 1/01/31		329,000		336,741
6.200% 3/15/40		267,000		267,520
6.375% 9/01/28		110,000		113,504
6.450% 9/15/36		68,000		71,026
6.625% 9/01/30		505,000		529,604
7.500% 5/01/31		285,000		314,421

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
8.500% 7/15/27	$	97,000	$	103,916
8.875% 7/15/30		646,000		743,932
Petroleos Mexicanos
4.875% 2/21/28 EUR (b) (c)		460,000		447,985
6.500% 3/13/27		1,185,000		1,129,145
QatarEnergy
3.125% 7/12/41 (b)		300,000		223,607
Raizen Fuels Finance SA
6.450% 3/05/34 (b)		200,000		203,160
6.950% 3/05/54 (b)		200,000		203,426
Sunoco LP
7.000% 5/01/29 (b)		55,000		56,369
7.250% 5/01/32 (b)		102,000		105,505
				7,581,094
Pharmaceuticals — 1.6%
AbbVie, Inc.
2.125% 11/17/28 EUR (c)		100,000		101,600
2.625% 11/15/28 EUR (c)		225,000		234,090
4.050% 11/21/39		230,000		199,778
4.250% 11/21/49		277,000		230,839
4.500% 5/14/35		492,000		464,083
4.875% 11/14/48		832,000		764,339
5.050% 3/15/34		526,000		524,461
Astrazeneca Finance LLC
5.000% 2/26/34		1,005,000		999,431
Bayer US Finance LLC
6.375% 11/21/30 (b)		480,000		491,891
Becton Dickinson & Co.
2.823% 5/20/30		433,000		382,870
3.020% 5/24/25 GBP (c)		150,000		185,681
3.519% 2/08/31 EUR (c)		113,000		119,836
Bristol-Myers Squibb Co.
5.650% 2/22/64		230,000		224,677
6.250% 11/15/53		264,000		283,549
CVS Health Corp.
5.050% 3/25/48		699,000		602,263
5.625% 2/21/53		366,000		339,761
5.875% 6/01/53		196,000		187,819
Eli Lilly & Co.
4.700% 2/09/34		1,020,000		1,000,134
Gruenenthal GmbH
6.750% 5/15/30 EUR (b) (c)		100,000		112,455
Pfizer Investment Enterprises Pte. Ltd.
5.300% 5/19/53		233,000		224,733
5.340% 5/19/63		374,000		353,021
Teva Pharmaceutical Finance Netherlands III BV
8.125% 9/15/31		200,000		222,372
Upjohn Finance BV
1.908% 6/23/32 EUR (b) (c)		145,000		129,970
Utah Acquisition Sub, Inc.
3.125% 11/22/28 EUR (b) (c)		155,000		160,794
				8,540,447
Pipelines — 1.4%
Boardwalk Pipelines LP
3.400% 2/15/31		756,000		661,940

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Cheniere Corpus Christi Holdings LLC
5.125% 6/30/27	$	199,000	$	198,668
Cheniere Energy Partners LP
4.500% 10/01/29		107,000		101,933
5.750% 8/15/34 (b)		607,000		609,418
5.950% 6/30/33		318,000		322,434
Cheniere Energy, Inc.
4.625% 10/15/28		162,000		157,221
5.650% 4/15/34 (b)		395,000		395,312
Columbia Pipelines Holding Co. LLC
5.681% 1/15/34 (b)		390,000		383,723
Enbridge, Inc.
5.300% 4/05/29		179,000		179,289
5.625% 4/05/34		322,000		321,470
6.200% 11/15/30		60,000		62,998
6.700% 11/15/53		196,000		214,022
Energy Transfer LP
2.900% 5/15/25		157,000		153,150
5.550% 5/15/34		209,000		206,843
5.950% 5/15/54		141,000		137,301
6.400% 12/01/30		264,000		277,601
6.550% 12/01/33		128,000		135,652
Kinetik Holdings LP
5.875% 6/15/30 (b)		90,000		88,687
6.625% 12/15/28 (b)		41,000		41,654
ONEOK, Inc.
5.650% 11/01/28		76,000		77,142
5.800% 11/01/30		217,000		222,122
6.050% 9/01/33		212,000		218,272
Sabine Pass Liquefaction LLC
4.200% 3/15/28		84,000		81,040
Tallgrass Energy Partners LP/Tallgrass Energy Finance Corp.
7.375% 2/15/29 (b)		25,000		25,122
Targa Resources Corp.
6.150% 3/01/29		210,000		216,764
Targa Resources Partners LP/Targa Resources Partners Finance Corp.
4.000% 1/15/32		107,000		96,400
4.875% 2/01/31		20,000		19,085
5.000% 1/15/28		76,000		74,440
5.500% 3/01/30		128,000		127,214
6.875% 1/15/29		181,000		185,610
Transcanada Trust 3 mo. CAD CDOR + 3.080%
4.650% VRN 5/18/77 CAD (c)		650,000		454,884
Venture Global Calcasieu Pass LLC
4.125% 8/15/31 (b)		140,000		125,631
6.250% 1/15/30 (b)		115,000		116,713
Venture Global LNG, Inc.
8.375% 6/01/31 (b)		65,000		67,420
9.500% 2/01/29 (b)		435,000		476,367
Western Midstream Operating LP
4.500% 3/01/28		81,000		78,109
6.350% 1/15/29		76,000		78,386
				7,390,037
Private Equity — 0.1%
HAT Holdings I LLC/HAT Holdings II LLC
8.000% 6/15/27 (b)		234,000		243,275

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Real Estate — 0.1%
Blackstone Property Partners Europe Holdings SARL
1.750% 3/12/29 EUR (b) (c)	$	280,000	$	264,372
Howard Hughes Corp.
5.375% 8/01/28 (b)		140,000		133,051
Logicor Financing SARL
0.875% 1/14/31 EUR (b) (c)		185,000		156,425
1.500% 7/13/26 EUR (b) (c)		167,000		168,614
				722,462
Real Estate Investment Trusts (REITS) — 0.8%
Alexandria Real Estate Equities, Inc.
5.250% 5/15/36		60,000		57,733
American Tower Corp.
5.200% 2/15/29		144,000		143,503
5.450% 2/15/34		421,000		417,322
Brixmor Operating Partnership LP
4.050% 7/01/30		255,000		236,646
4.125% 6/15/26		1,700,000		1,655,128
4.125% 5/15/29		136,000		128,365
Crown Castle, Inc.
2.500% 7/15/31		316,000		261,100
5.600% 6/01/29		73,000		73,623
5.800% 3/01/34		196,000		197,986
GLP Capital LP/GLP Financing II, Inc.
3.350% 9/01/24		107,000		106,371
Healthcare Realty Holdings LP
2.050% 3/15/31		196,000		151,662
3.625% 1/15/28		722,000		667,300
Inmobiliaria Colonial Socimi SA
1.625% 11/28/25 EUR (b) (c)		200,000		207,978
MGM Growth Properties Operating Partnership LP/MGP Finance Co.-Issuer, Inc.
5.750% 2/01/27		55,000		55,069
Prologis LP
2.250% 6/30/29 GBP (c)		150,000		167,136
				4,526,922
Retail — 0.3%
The Home Depot, Inc.
4.950% 6/25/34		425,000		420,570
5.300% 6/25/54		220,000		214,798
Lowe's Cos., Inc.
4.250% 4/01/52		96,000		75,448
5.625% 4/15/53		165,000		159,764
5.750% 7/01/53		128,000		126,060
Next Group PLC
3.625% 5/18/28 GBP (b) (c)		250,000		300,367
Ross Stores, Inc.
1.875% 4/15/31		455,000		372,713
Yum! Brands, Inc.
5.375% 4/01/32		140,000		134,579
				1,804,299
Savings & Loans — 0.1%
Nationwide Building Society

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3 mo. EURIBOR + 0.930% 1.500% VRN 3/08/26 EUR (b) (c)	$	140,000	$	147,487
5 yr. EUR Swap + 1.500% 2.000% VRN 7/25/29 EUR (b) (c)		150,000		160,395
				307,882
Semiconductors — 0.3%
Broadcom, Inc.
2.600% 2/15/33 (b)		280,000		226,914
3.419% 4/15/33 (b)		382,000		329,341
Intel Corp.
3.050% 8/12/51		447,000		283,539
3.250% 11/15/49		646,000		433,274
Micron Technology, Inc.
6.750% 11/01/29		251,000		266,968
				1,540,036
Software — 0.3%
Atlassian Corp.
5.250% 5/15/29		123,000		123,005
Fiserv, Inc.
1.625% 7/01/30 EUR (c)		100,000		94,944
3.000% 7/01/31 GBP (c)		250,000		274,000
4.500% 5/24/31 EUR (c)		200,000		222,340
IPD 3 BV
8.000% 6/15/28 EUR (b) (c)		100,000		112,450
Oracle Corp.
4.900% 2/06/33		382,000		370,552
UKG, Inc.
6.875% 2/01/31 (b)		190,000		192,381
				1,389,672
Telecommunications — 1.5%
Altice France SA
3.375% 1/15/28 EUR (b) (c)		135,000		101,179
America Movil SAB de CV
5.750% 6/28/30 GBP (c)		190,000		248,681
AT&T, Inc.
3.500% 9/15/53		259,000		175,819
3.950% 4/30/31 EUR (c)		250,000		271,723
Chorus Ltd.
3.625% 9/07/29 EUR (c)		215,000		228,451
Lorca Telecom Bondco SA
4.000% 9/18/27 EUR (b) (c)		235,000		245,419
Motorola Solutions, Inc.
5.000% 4/15/29		157,000		155,786
5.400% 4/15/34		183,000		181,420
NBN Co. Ltd.
4.125% 3/15/29 EUR (b) (c)		355,000		391,295
Orange SA
3.250% 1/15/32 GBP (b) (c)		200,000		225,049
Rogers Communications, Inc.
3.800% 3/15/32		251,000		224,269
4.350% 5/01/49		34,000		27,048
4.550% 3/15/52		1,535,000		1,253,150
5.000% 2/15/29		436,000		430,626
5.300% 2/15/34		489,000		479,834
Sprint Capital Corp.

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
6.875% 11/15/28	$	569,000	$	603,198
8.750% 3/15/32		357,000		429,404
T-Mobile USA, Inc.
5.750% 1/15/54		727,000		723,575
6.000% 6/15/54		656,000		678,279
TDC Net AS
5.056% 5/31/28 EUR (b) (c)		100,000		108,994
5.618% 2/06/30 EUR (b) (c)		240,000		263,942
Tele2 AB
0.750% 3/23/31 EUR (b) (c)		230,000		209,989
2.125% 5/15/28 EUR (b) (c)		100,000		101,303
Verizon Communications, Inc.
2.625% 12/01/31 EUR (c)		235,000		237,147
Vmed O2 UK Financing I PLC
4.500% 7/15/31 GBP (b) (c)		155,000		161,598
7.750% 4/15/32 (b)		270,000		263,369
				8,420,547
Toys, Games & Hobbies — 0.1%
Mattel, Inc.
5.875% 12/15/27 (b)		366,000		366,638
Transportation — 0.1%
Brambles Finance PLC
4.250% 3/22/31 EUR (b) (c)		180,000		197,509
Burlington Northern Santa Fe LLC
5.500% 3/15/55		345,000		345,628
Genesee & Wyoming, Inc.
6.250% 4/15/32 (b)		140,000		139,475
				682,612
Water — 0.1%
Severn Trent Utilities Finance PLC
4.625% 11/30/34 GBP (b) (c)		160,000		187,537
Veolia Environnement SA
1.940% 1/07/30 EUR (b) (c)		200,000		196,852
				384,389
TOTAL CORPORATE DEBT (Cost $148,774,411)				144,930,861
MUNICIPAL OBLIGATIONS — 0.1%
California — 0.0%
City of Los Angeles Department of Airports, CA, Revenue Bonds, Series C,
6.582% 5/15/39		90,000		96,961
Illinois — 0.0%
State of Illinois, General Obligation,
7.350% 7/01/35		98,571		105,774
Puerto Rico — 0.1%
Commonwealth of Puerto Rico, General Obligation, Series CW,
0.000% 11/01/43 (f)		653,665		400,370
TOTAL MUNICIPAL OBLIGATIONS (Cost $544,707)				603,105

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 8.0%
Automobile Asset-Backed Securities — 1.8%
AmeriCredit Automobile Receivables Trust, Series 2023-1, Class C
5.800% 12/18/28	$	400,000	$	404,903
Bayview Opportunity Master Fund VII LLC
Series 2024-CAR1, Class A, 30 day USD SOFR Average + 1.100% 6.435% FRN 12/26/31 (b)		282,602		283,496
Series 2024-CAR1, Class C, 30 day USD SOFR Average + 1.500% 6.835% FRN 12/26/31 (b)		224,287		224,286
CarMax Auto Owner Trust, Series 2024-1, Class B
5.170% 8/15/29		70,000		69,281
Carmax Select Receivables Trust
Series 2024-A, Class B, 5.350% 1/15/30		145,000		145,079
Series 2024-A, Class A3, 5.400% 11/15/28		125,000		124,895
Carvana Auto Receivables Trust
Series 2024-P2, Class A4, 5.210% 6/10/30		335,000		335,478
Series 2024-N1, Class A3, 5.600% 3/10/28 (b)		185,000		184,850
Series 2024-N1, Class B, 5.630% 5/10/30 (b)		225,000		225,379
Series 2024-N2, Class A3, 5.710% 7/10/28 (b)		355,000		356,483
Enterprise Fleet Financing LLC, Series 2024-1, Class A3
5.160% 9/20/30 (b)		280,000		279,277
Exeter Automobile Receivables Trust
Series 2021-2A, Class D, 1.400% 4/15/27		235,000		225,859
Series 2022-3A, Class C, 5.300% 9/15/27		520,000		517,789
Series 2023-1A, Class D, 6.690% 6/15/29		85,000		85,822
Ford Credit Auto Lease Trust
Series 2024-A, Class A4, 5.050% 6/15/27		120,000		119,101
Series 2023-A, Class C, 5.540% 12/15/26		850,000		847,926
Ford Credit Auto Owner Trust
Series 2023-1, Class A, 4.850% 8/15/35 (b)		895,000		886,949
Series 2022-C, Class C, 5.220% 3/15/30		200,000		199,168
Huntington Bank Auto Credit-Linked Notes, Series 2024-1, Class B1
6.153% 5/20/32 (b)		360,000		360,741
Hyundai Auto Lease Securitization Trust, Series 2024-A, Class A4
5.070% 2/15/28 (b)		150,000		149,402
Navistar Financial Dealer Note Master Owner Trust, Series 2024-1, Class A
5.590% 4/25/29 (b)		305,000		305,576
Octane Receivables Trust
Series 2024-1A, Class A2, 5.680% 5/20/30 (b)		270,000		269,968
Series 2023-1A, Class A, 5.870% 5/21/29 (b)		73,802		73,812
Series 2023-3A, Class B, 6.480% 7/20/29 (b)		150,000		151,932
Series 2023-3A, Class C, 6.740% 8/20/29 (b)		100,000		101,916
Santander Bank Auto Credit-Linked Notes
Series 2021-1A, Class B, 1.833% 12/15/31 (b)		24,321		24,087
Series 2023-B, Class B, 5.640% 12/15/33 (b)		250,000		249,454
Santander Consumer Auto Receivables Trust, Series 2021-AA, Class D
1.570% 1/15/27 (b)		735,000		697,983
Santander Drive Auto Receivables Trust
Series 2021-4, Class D, 1.670% 10/15/27		310,000		298,181
Series 2022-6, Class B, 4.720% 6/15/27		850,000		843,972
SBNA Auto Lease Trust
Series 2024-A, Class A4, 5.240% 1/22/29 (b)		165,000		164,602
Series 2024-A, Class A3, 5.390% 11/20/26 (b)		175,000		174,733
SFS Auto Receivables Securitization Trust
Series 2024-1A, Class A4, 4.940% 1/21/31 (b)		130,000		129,104
Series 2024-1A, Class C, 5.510% 1/20/32 (b)		65,000		65,004

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
US Bank NA, Series 2023-1, Class B
6.789% 8/25/32 (b)	$	184,699	$	185,543
				9,762,031
Commercial Mortgage-Backed Securities — 1.2%
Austin Fairmont Hotel Trust, Series 2019-FAIR, Class B, 1 mo. USD Term SOFR + 1.297%
6.626% FRN 9/15/32 (b)		235,000		234,559
BBCMS Mortgage Trust
Series 2024-5C27, Class A3, 6.014% 7/15/57 (g)		120,000		122,971
Series 2019-BWAY, Class D, 1 mo. USD Term SOFR + 2.274% 7.604% FRN 11/15/34 (b)		245,000		18,604
BX Commercial Mortgage Trust, Series 2024-MDHS, Class A, 1 mo. USD Term SOFR + 1.641%
6.970% FRN 5/15/41 (b)		1,175,000		1,172,430
BX Trust, Series 2021-ARIA, Class B, 1 mo. USD Term SOFR + 1.411%
6.741% FRN 10/15/36 (b)		475,000		468,171
Cantor Commercial Real Estate Lending, Series 2019-CF2, Class B
3.267% 11/15/52		295,000		248,445
Cold Storage Trust, Series 2020-ICE5, Class A, 1 mo. USD Term SOFR + 1.014%
6.342% FRN 11/15/37 (b)		211,343		210,555
Credit Suisse Mortgage Trust
Series 2020-NET, Class A, 2.257% 8/15/37 (b)		268,738		254,119
Series 2020-NET, Class C, 3.526% 8/15/37 (b)		480,000		450,496
CyrusOne Data Centers Issuer I LLC
Series 2024-2A, Class A2, 4.500% 5/20/49 (b)		1,155,000		1,067,972
Series 2024-3A, Class A2, 4.650% 5/20/49 (b)		435,000		392,742
Series 2024-1A, Class A2, 4.760% 3/22/49 (b)		160,000		149,418
JP Morgan Chase Commercial Mortgage Securities Trust, Series 2018-WPT, Class AFX
4.248% 7/05/33 (b)		115,000		106,394
MED Commercial Mortgage Trust, Series 2024-MOB, Class A, 1 mo. USD Term SOFR + 1.592%
6.920% FRN 5/15/41 (b)		330,000		327,526
SDR Commercial Mortgage Trust, Series 2024-DSNY, Class A, 1 mo. USD Term SOFR + 1.392%
6.721% FRN 5/15/39 (b)		690,000		686,549
TX Trust, Series 2024-HOU, Class A, 1 mo. USD Term SOFR + 1.591%
6.910% FRN 6/15/39 (b)		190,000		188,339
VNDO Trust, Series 2016-350P, Class D,
4.033% VRN 1/10/35 (b) (h)		215,000		195,542
WB Commercial Mortgage Trust, Series 2024-HQ, Class A,
6.134% VRN 3/15/40 (b) (h)		150,000		149,909
Wells Fargo Commercial Mortgage Trust, Series 2021-SAVE, Class C, 1 mo. USD Term SOFR + 1.914%
7.244% FRN 2/15/40 (b)		324,000		319,964
				6,764,705
Other Asset-Backed Securities — 3.7%
522 Funding CLO Ltd., Series 2019-5A, Class BR, 3 mo. USD Term SOFR + 1.850%
7.179% FRN 4/15/35 (b)		465,000		465,795
Amur Equipment Finance Receivables X LLC, Series 2022-1A, Class C
2.370% 4/20/28 (b)		175,000		167,319
Amur Equipment Finance Receivables XIII LLC, Series 2024-1A, Class A2
5.380% 1/21/31 (b)		400,000		398,927

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Auxilior Term Funding LLC
Series 2024-1A, Class A3, 5.490% 7/15/31 (b) (g)	$	140,000	$	139,883
Series 2024-1A, Class A2, 5.840% 3/15/27 (b) (g)		170,000		170,001
CIFC Funding Ltd., Series 2020-1A, Class A1R, 3 mo. USD Term SOFR + 1.412%
6.740% FRN 7/15/36 (b)		925,000		925,875
Cologix Canadian Issuer LP, Series 2022-1CAN, Class A2
4.940% 1/25/52 CAD (b) (c)		275,000		187,699
Crossroads Asset Trust, Series 2024-A, Class A2
5.900% 8/20/30 (b)		220,000		219,897
Dell Equipment Finance Trust
Series 2024-1, Class C, 5.730% 3/22/30 (b)		100,000		100,333
Series 2023-3, Class C, 6.170% 4/23/29 (b)		125,000		125,745
DLLST LLC
Series 2024-1A, Class A4, 4.930% 4/22/30 (b)		45,000		44,542
Series 2024-1A, Class A3, 5.050% 8/20/27 (b)		190,000		188,583
Driven Brands Funding LLC
Series 2020-2A, Class A2, 3.237% 1/20/51 (b)		546,638		497,531
Series 2020-1A, Class A2, 3.786% 7/20/50 (b)		264,688		247,681
Series 2019-1A, Class A2, 4.641% 4/20/49 (b)		161,075		157,278
Dryden 86 CLO Ltd., Series 2020-86A, Class A1R, 3 mo. USD Term SOFR + 1.362%
6.679% FRN 7/17/34 (b)		300,000		300,188
Elara HGV Timeshare Issuer LLC
Series 2023-A, Class A, 6.160% 2/25/38 (b)		174,270		176,096
Series 2023-A, Class B, 6.530% 2/25/38 (b)		140,038		141,428
Elmwood CLO 20 Ltd., Series 2022-7A, Class AR, 3 mo. USD Term SOFR + 1.500%
6.823% FRN 1/17/37 (b)		305,000		306,754
FirstKey Homes Trust, Series 2020-SFR2, Class C
1.667% 10/19/37 (b)		340,000		321,473
Hardee's Funding LLC
Series 2021-1A, Class A2, 2.865% 6/20/51 (b)		291,000		250,211
Series 2024-1A, Class A2, 7.253% 3/20/54 (b)		623,438		631,223
HPEFS Equipment Trust
Series 2022-1A, Class C, 1.960% 5/21/29 (b)		129,000		127,106
Series 2022-1A, Class D, 2.400% 11/20/29 (b)		350,000		339,404
Series 2024-2A, Class B, 5.350% 10/20/31 (b)		100,000		100,106
Series 2024-2A, Class A3, 5.360% 10/20/31 (b)		145,000		144,919
Series 2023-2A, Class B, 6.250% 1/21/31 (b)		100,000		100,191
Series 2023-2A, Class C, 6.480% 1/21/31 (b)		140,000		140,240
Series 2023-2A, Class D, 6.970% 7/21/31 (b)		100,000		99,974
HPS Loan Management Ltd., Series 11A-17, Class BR, 3 mo. USD Term SOFR + 1.812%
7.148% FRN 5/06/30 (b)		265,000		265,056
Invesco US CLO Ltd., Series 2023-1A, Class AR, 3 mo. USD Term SOFR + 1.570%
6.856% FRN 4/22/37 (b)		500,000		502,000
Jamestown CLO XV Ltd., Series 2020-15A, Class A1R, 3 mo. USD Term SOFR + 1.370%
6.698% FRN 7/15/35 (b)		465,000		465,202
Kubota Credit Owner Trust
Series 2023-1A, Class A4, 5.070% 2/15/29 (b)		110,000		108,822
Series 2024-2A, Class A4, 5.190% 5/15/30 (b)		145,000		144,876
Series 2024-2A, Class A3, 5.260% 11/15/28 (b)		275,000		274,786
Madison Park Funding LXI Ltd., Series 2023-61A, Class A, 3 mo. USD Term SOFR + 1.730%
7.037% FRN 1/20/37 (b)		275,000		277,479

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Madison Park Funding XXXIII Ltd., Series 2019-33A, Class AR, 3 mo. USD Term SOFR + 1.290%
6.619% FRN 10/15/32 (b)	$	465,000	$	465,466
MidOcean Credit CLO XI Ltd., Series 2022-11A, Class A1R, 3 mo. USD Term SOFR + 1.730%
7.057% FRN 10/18/33 (b)		455,000		456,810
MVW LLC
Series 2023-1A, Class A, 4.930% 10/20/40 (b)		437,418		432,406
Series 2023-2A, Class A, 6.180% 11/20/40 (b)		185,517		188,062
Series 2023-2A, Class B, 6.330% 11/20/40 (b)		111,654		113,221
Northwoods Capital XIV-B Ltd., Series 2018-14BA, Class AR, 3 mo. USD Term SOFR + 1.250%
6.574% FRN 11/13/31 (b)		530,000		529,586
Octagon Investment Partners 49 Ltd., Series 2020-5A, Class AR, 3 mo. USD Term SOFR + 1.520%
6.811% FRN 4/15/37 (b)		830,000		833,133
Palmer Square CLO Ltd., Series 2020-3A, Class A1R2, 3 mo. USD Term SOFR + 1.650%
6.972% FRN 11/15/36 (b)		430,000		434,512
Post Road Equipment Finance LLC, Series 2024-1A, Class A2
5.590% 11/15/29 (b)		130,000		130,036
Progress Residential Trust
Series 2021-SFR1, Class A, 1.052% 4/17/38 (b)		288,102		266,351
Series 2020-SFR3, Class B, 1.495% 10/17/27 (b)		100,000		95,015
RR 28 Ltd., Series 2024-28RA, Class A1R, 3 mo. USD Term SOFR + 1.550%
6.841% FRN 4/15/37 (b)		650,000		655,253
SBA Tower Trust
1.840% 4/15/27 (b)		635,000		571,135
2.593% 10/15/56 (b)		515,000		420,501
SCF Equipment Leasing LLC, Series 2024-1A, Class A3
5.520% 1/20/32 (b)		325,000		326,855
SEB Funding LLC, Series 2024-1A, Class A2
7.386% 4/30/54 (b)		740,000		750,064
Symphony CLO XVI Ltd., Series 2015-16A, Class ARR, 3 mo. USD Term SOFR + 1.200%
6.523% FRN 10/15/31 (b)		1,075,000		1,075,727
Symphony CLO XXXI Ltd., Series 2022-31A, Class B, 3 mo. USD Term SOFR + 1.850%
7.175% FRN 4/22/35 (b)		410,000		410,625
TIAA CLO I Ltd., Series 2016-1A, Class ARR, 3 mo. USD Term SOFR + 1.250%
6.575% FRN 7/20/31 (b)		750,000		750,724
Tricon Residential Trust, Series 2024-SFR2, Class A
4.750% 6/17/40 (b)		565,000		550,736
Trinitas CLO VI Ltd., 3 mo. USD Term SOFR + 1.330%
6.663% FRN 1/25/34 (b)		1,000,000		998,287
Verdant Receivables LLC, Series 2024-1A, Class A2
5.680% 12/12/31 (b)		130,000		130,416
Verizon Master Trust, Series 2023-1, Class C
4.980% 1/22/29		250,000		239,677
Wellfleet CLO Ltd., Series 2017-2A, Class A1R, 3 mo. USD Term SOFR + 1.322%
6.646% FRN 10/20/29 (b)		45,074		45,078
Wise CLO Ltd., Series 2024-2A, Class A, 3 mo. USD Term SOFR + 1.460%
6.805% FRN 7/15/37 (b) (g)		300,000		300,000
				20,424,299

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Student Loans Asset-Backed Securities — 0.3%
Navient Private Education Refi Loan Trust, Series 2020-CA, Class B
2.830% 11/15/68 (b)	$	470,000	$	388,108
SMB Private Education Loan Trust
Series 2020-B, Class A1A, 1.290% 7/15/53 (b)		131,645		120,656
Series 2021-A, Class B, 2.310% 1/15/53 (b)		511,355		480,391
Series 2018-A, Class A2A, 3.500% 2/15/36 (b)		350,940		339,707
				1,328,862
Whole Loan Collateral Collateralized Mortgage Obligations — 0.8%
Angel Oak Mortgage Trust
Series 2022-1, Class A1, 2.881% STEP 12/25/66 (b)		272,145		247,261
Series 2020-5, Class M1, 2.970% VRN 5/25/65 (b) (h)		275,000		238,252
BINOM Securitization Trust, Series 2021-INV1, Class A1,
2.034% VRN 6/25/56 (b) (h)		239,925		204,472
CIM Trust, Series 2021-INV1, Class A29,
2.500% VRN 7/01/51 (b) (h)		552,558		434,146
Citigroup Mortgage Loan Trust, Series 2022-INV1, Class A4B,
3.000% VRN 11/27/51 (b) (h)		203,241		166,348
Flagstar Mortgage Trust
Series 2018-6RR, Class 2A4, 4.000% VRN 9/25/48 (b) (h)		13,226		12,468
Series 2020-1INV, Class A11, 1 mo. USD Term SOFR + 0.964% 6.000% FRN 3/25/50 (b)		76,818		73,781
Galton Funding Mortgage Trust, Series 2018-1, Class A23,
3.500% VRN 11/25/57 (b) (h)		16,975		15,175
GS Mortgage-Backed Securities Trust, Series 2020-INV1, Class A14,
2.921% VRN 10/25/50 (b) (h)		219,231		182,694
Imperial Fund Mortgage Trust, Series 2021-NQM2, Class A1,
1.073% VRN 9/25/56 (b) (h)		178,793		145,509
JP Morgan Mortgage Trust
Series 2020-LTV1, Class B1A, 3.262% VRN 6/25/50 (b) (h)		345,510		279,963
Series 2019-INV3, Class A3, 3.500% VRN 5/25/50 (b) (h)		95,524		83,313
Series 2020-LTV1, Class A3, 3.500% VRN 6/25/50 (b) (h)		11,940		11,552
Series 2020-INV1, Class A3, 3.500% VRN 8/25/50 (b) (h)		82,189		71,378
Series 2020-5, Class B2, 3.570% VRN 12/25/50 (b) (h)		323,443		274,634
Series 2020-INV1, Class A11, 1 mo. USD Term SOFR + 0.944% 6.000% FRN 8/25/50 (b)		52,053		50,011
Morgan Stanley Residential Mortgage Loan Trust, Series 2023-NQM1, Class A2,
7.530% STEP 9/25/68 (b)		151,277		154,088
OBX Trust
Series 2020-EXP1, Class 1A8, 3.500% VRN 2/25/60 (b) (h)		229,091		195,529
Series 2019-INV2, Class A25, 4.000% VRN 5/27/49 (b) (h)		93,564		84,820
Series 2023-NQM9, Class A2, 7.513% STEP 10/25/63 (b)		87,504		89,292
Sequoia Mortgage Trust
Series 2017-CH1, Class A2, 3.500% VRN 8/25/47 (b) (h)		33,802		30,422
Series 2017-CH1, Class A13, 4.000% VRN 8/25/47 (b) (h)		42,020		38,768
Series 2018-CH3, Class A2, 4.000% VRN 8/25/48 (b) (h)		6,523		6,207
SG Residential Mortgage Trust, Series 2019-3, Class A1,
2.703% VRN 9/25/59 (b) (h)		4,497		4,426
Towd Point Mortgage Trust, Series 2019-HY3, Class A1A, 1 mo. USD Term SOFR + 1.114%
6.460% FRN 10/25/59 (b)		79,644		80,661
Verus Securitization Trust
Series 2021-5, Class A2, 1.218% VRN 9/25/66 (b) (h)		245,073		206,682
Series 2022-1, Class A1, 2.724% STEP 1/25/67 (b)		669,719		602,827

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2020-INV1, Class A3, 4.889% VRN 3/25/60 (b) (h)	$	100,000	$	97,768
				4,082,447
Whole Loan Collateral Support Collateralized Mortgage Obligations — 0.2%
Bayview MSR Opportunity Master Fund Trust, Series 2021-4, Class A20,
2.500% VRN 10/25/51 (b) (h)		392,117		308,088
GS Mortgage-Backed Securities Trust
Series 2021-GR1, Class A4, 2.500% VRN 11/25/51 (b) (h)		413,280		324,715
Series 2021-GR2, Class A4, 2.500% VRN 2/25/52 (b) (h)		427,397		335,807
JP Morgan Mortgage Trust
Series 2019-INV3, Class A15, 3.500% VRN 5/25/50 (b) (h)		82,234		71,519
Series 2020-LTV1, Class A15, 3.500% VRN 6/25/50 (b) (h)		5,104		4,943
Sequoia Mortgage Trust
Series 2018-CH1, Class A19, 4.000% VRN 3/25/48 (b) (h)		54,521		48,905
Series 2018-CH2, Class A21, 4.000% VRN 6/25/48 (b) (h)		18,593		16,741
				1,110,718
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $45,237,145)				43,473,062
SOVEREIGN DEBT OBLIGATIONS — 18.3%
Albania Government International Bond
3.500% 6/16/27 EUR (b) (c)		105,000		108,790
5.900% 6/09/28 EUR (b) (c)		410,000		452,015
Australia Government Bond
3.000% 3/21/47 AUD (b) (c)		701,000		358,835
4.500% 4/21/33 AUD (b) (c)		3,153,000		2,135,565
Brazil Notas do Tesouro Nacional Series F
10.000% 1/01/27 BRL (c)		2,855,000		466,445
10.000% 1/01/31 BRL (c)		12,107,000		1,849,908
10.000% 1/01/35 BRL (c)		3,927,000		580,910
Bulgaria Government International Bond
4.375% 5/13/31 EUR (b) (c)		446,000		495,556
4.500% 1/27/33 EUR (b) (c)		90,000		100,078
4.500% 1/27/33 EUR (b) (c)		485,000		539,307
Bundesobligation
10/09/26EUR (b) (c)		1,914,000		1,929,271
Bundesrepublik Deutschland Bundesanleihe
0.000% 2/15/30 EUR (b) (c)		2,447,000		2,293,476
0.000% 8/15/52 EUR (b) (c)		254,210		131,296
2.500% 8/15/54 EUR (b) (c)		497,000		512,782
4.750% 7/04/40 EUR (b) (c)		438,000		594,254
Canadian Government Bond
3.250% 12/01/33 CAD (c)		1,576,000		1,128,412
4.000% 3/01/29 CAD (c)		3,649,000		2,722,273
Canadian Government Real Return Bond
4.000% 12/01/31 CAD (c)		2,007,760		1,702,160
Chile Government International Bond
4.125% 7/05/34 EUR (c)		170,000		184,347
China Development Bank
3.480% 1/08/29 CNY (c)		9,000,000		1,312,576
China Government Bond
2.280% 3/25/31 CNY (c)		4,000,000		555,355
2.600% 9/01/32 CNY (c)		7,000,000		989,189
2.670% 5/25/33 CNY (c)		27,600,000		3,925,374
2.690% 8/15/32 CNY (c)		3,500,000		497,831

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3.320% 4/15/52 CNY (c)	$	13,600,000	$	2,173,044
4.000% 6/24/69 CNY (c)		1,000,000		191,994
Colombia TES
6.000% 4/28/28 COP (c)		1,597,700,000		336,709
7.000% 3/26/31 COP (c)		2,550,000,000		514,298
7.250% 10/18/34 COP (c)		1,163,500,000		219,419
13.250% 2/09/33 COP (c)		2,377,700,000		650,538
Cyprus Government International Bond
0.950% 1/20/32 EUR (b) (c)		610,000		551,953
2.750% 2/26/34 EUR (b) (c)		93,000		93,637
2.750% 5/03/49 EUR (b) (c)		99,000		88,760
Czech Republic Government Bond
1.500% 4/24/40 CZK (c)		5,960,000		173,706
2.000% 10/13/33 CZK (c)		23,970,000		857,499
Deutsche Bundesrepublik Inflation-Linked Bond
0.500% 4/15/30 EUR (b) (c)		1,189,720		1,271,940
Estonia Government International Bond
3.250% 1/17/34 EUR (b) (c)		850,000		885,115
French Republic Government Bond OAT
1.250% 5/25/36 EUR (b) (c)		636,000		540,942
3.000% 5/25/54 EUR (b) (c)		1,241,000		1,156,944
Hellenic Republic Government Bond
0.750% 6/18/31 EUR (b) (c)		585,000		523,408
Hungary Government International Bond
2.250% 4/20/33 HUF (c)		523,970,000		1,003,212
5.000% 2/22/27 EUR (b) (c)		247,000		272,242
Iceland Government International Bond
0.000% 4/15/28 EUR (b) (c)		346,000		327,232
3.500% 3/21/34 EUR (b) (c)		209,000		226,047
India Government Bond
6.540% 1/17/32 INR (c)		55,500,000		645,201
7.260% 8/22/32 INR (c)		84,100,000		1,017,691
Indonesia Government International Bond
3.750% 6/14/28 EUR (b) (c)		1,280,000		1,366,978
Indonesia Treasury Bond
5.500% 4/15/26 IDR (c)		9,880,000,000		591,477
6.375% 8/15/28 IDR (c)		10,396,000,000		624,107
6.375% 4/15/32 IDR (c)		5,431,000,000		318,814
7.000% 2/15/33 IDR (c)		22,970,000,000		1,393,630
Ireland Government Bond
1.500% 5/15/50 EUR (b) (c)		36,000		26,853
2.000% 2/18/45 EUR (b) (c)		157,000		137,719
Israel Government International Bond
1.500% 1/18/27 EUR (b) (c)		530,000		527,463
Italy Buoni Poliennali Del Tesoro
1.300% 5/15/28 EUR (b) (c)		1,062,006		1,119,158
2.800% 3/01/67 EUR (b) (c)		920,000		692,195
Ivory Coast Government International Bond
5.875% 10/17/31 EUR (b) (c)		485,000		467,782
Japan Government Forty Year Bond
1.300% 3/20/63 JPY (c)		58,600,000		269,639
Japan Government Ten Year Bond
0.400% 3/20/25 JPY (c)		283,500,000		1,765,527
Japan Government Thirty Year Bond
1.000% 3/20/52 JPY (c)		230,200,000		1,095,729
1.300% 6/20/52 JPY (c)		221,250,000		1,135,678

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
1.400% 9/20/52 JPY (c)	$	209,450,000	$	1,099,987
1.700% 9/20/44 JPY (c)		319,100,000		1,926,500
Japanese Government CPI-Linked Bond
0.005% 3/10/31 JPY (c)		205,171,932		1,362,584
0.005% 3/10/32 JPY (c)		103,449,660		683,492
0.005% 3/10/33 JPY (c)		76,664,182		503,899
0.005% 3/10/34 JPY (c)		108,588,600		712,045
0.100% 9/10/24 JPY (c)		301,334,200		1,882,285
0.100% 3/10/25 JPY (c)		270,983,800		1,704,491
Latvia Government International Bond
0.375% 10/07/26 EUR (b) (c)		2,114,000		2,105,510
3.875% 5/22/29 EUR (b) (c)		350,000		381,017
Lithuania Government International Bond
3.500% 2/13/34 EUR (b) (c)		344,000		363,568
3.875% 6/14/33 EUR (b) (c)		815,000		889,040
Magyar Export-Import Bank Zrt
6.000% 5/16/29 EUR (b) (c)		120,000		134,940
Malaysia Government Bond
3.900% 11/30/26 MYR (c)		680,000		145,683
3.906% 7/15/26 MYR (c)		4,060,000		868,481
4.065% 6/15/50 MYR (c)		2,120,000		437,960
4.457% 3/31/53 MYR (c)		1,095,000		240,621
4.642% 11/07/33 MYR (c)		1,805,000		404,974
4.736% 3/15/46 MYR (c)		5,640,000		1,287,532
4.921% 7/06/48 MYR (c)		4,655,000		1,091,641
4.935% 9/30/43 MYR (c)		325,000		75,974
Mexican Bonos
7.500% 5/26/33 MXN (c)		5,376,000		252,809
8.500% 5/31/29 MXN (c)		4,567,000		234,880
8.500% 11/18/38 MXN (c)		20,878,000		1,011,057
Mexico Government International Bond
5.000% 5/07/29		455,000		444,312
6.000% 5/07/36		430,000		418,640
Montenegro Government International Bond
7.250% 3/12/31 (b)		400,000		401,500
Morocco Government International Bond
1.375% 3/30/26 EUR (b) (c)		380,000		385,219
New South Wales Treasury Corp.
4.000% 5/20/26 AUD (b) (c)		860,000		569,377
4.000% 5/20/26 AUD (b) (c)		680,000		450,205
New Zealand Government Bond
2.750% 5/15/51 NZD (c)		521,000		213,037
3.500% 4/14/33 NZD (b) (c)		2,426,000		1,356,241
North Macedonia Government International Bond
6.960% 3/13/27 EUR (b) (c)		150,000		166,411
Panama Government International Bond
7.500% 3/01/31		915,000		956,375
Peru Government Bond
5.400% 8/12/34 PEN (c)		5,000,000		1,143,132
Peru Government International Bond
5.400% 8/12/34 PEN (b) (c)		2,185,000		500,224
Philippines Government International Bond
0.250% 4/28/25 EUR (c)		125,000		129,494
Province of Ontario
3.500% 6/02/43 CAD (c)		62,000		40,109
3.500% 6/02/43 CAD (c)		76,000		49,165
Republic of Austria Government Bond
0.750% 3/20/51 EUR (b) (c)		1,096,000		658,102

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Republic of Italy Government International Bond
2.375% 10/17/24	$	1,390,000	$	1,377,136
Republic of Poland Government Bond
5.000% 10/25/34 PLN (c)		3,475,000		814,244
6.000% 10/25/33 PLN (c)		1,650,000		419,893
Romanian Government International Bond
5.875% 1/30/29 (b)		510,000		506,736
Saudi Government International Bond
5.750% 1/16/54 (b)		340,000		331,160
Serbia International Bond
1.000% 9/23/28 EUR (b) (c)		850,000		773,880
1.500% 6/26/29 EUR (b) (c)		282,000		256,495
1.650% 3/03/33 EUR (b) (c)		435,000		348,256
3.125% 5/15/27 EUR (b) (c)		480,000		492,209
Singapore Government Bond
0.500% 11/01/25 SGD (c)		1,350,000		956,648
1.625% 7/01/31 SGD (c)		1,444,000		959,898
2.375% 6/01/25 SGD (c)		480,000		349,867
2.875% 7/01/29 SGD (c)		960,000		696,425
3.250% 6/01/54 SGD (b) (c)		276,000		212,089
Slovenia Government Bond
0.000% 2/12/31 EUR (b) (c)		155,000		135,283
1.500% 3/25/35 EUR (b) (c)		328,000		293,723
2.250% 3/03/32 EUR (b) (c)		170,000		170,628
3.125% 8/07/45 EUR (b) (c)		661,000		653,262
Spain Government Bond
0.000% 1/31/28 EUR (c)		1,561,000		1,501,690
1.900% 10/31/52 EUR (b) (c)		513,000		360,460
Sri Lanka Government Bond
11.400% 1/15/27 LKR (c)		31,000,000		102,867
11.500% 8/01/26 LKR (c)		28,000,000		93,366
20.000% 9/15/27 LKR (c)		40,000,000		162,014
Sweden Bond Inflation-Linked
0.125% 6/01/32 SEK (b) (c)		4,680,000		562,833
Sweden Government Bond
1.750% 11/11/33 SEK (b) (c)		10,800,000		979,826
2.250% 6/01/32 SEK (b) (c)		8,815,000		835,607
Thailand Government Bond
2.000% 12/17/31 THB (c)		38,404,000		1,002,071
3.450% 6/17/43 THB (c)		18,200,000		508,579
UK Gilts
0.625% 7/31/35 GBP (b) (c)		739,000		637,758
0.625% 10/22/50 GBP (b) (c)		1,799,000		907,827
3.250% 1/22/44 GBP (b) (c)		1,844,000		1,923,541
4.000% 10/22/63 GBP (b) (c)		279,000		315,158
4.250% 12/07/46 GBP (b) (c)		1,699,000		2,028,722
				100,172,949
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $109,935,444)				100,172,949
U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (i) — 21.6%
Collateralized Mortgage Obligations — 0.1%
Government National Mortgage Association REMICS Series 2022-63, Class LM 3.500% 10/20/50		260,000		215,469

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pass-Through Securities — 21.4%
Federal Home Loan Mortgage Corp.
Pool #SB0869 1.500% 2/01/36	$	179,701	$	154,667
Pool #RC1756 1.500% 2/01/36		209,722		179,982
Pool #QN7552 2.000% 8/01/36		255,117		224,339
Pool #RB5114 2.000% 6/01/41		144,231		120,645
Pool #RB5148 2.000% 3/01/42		568,560		472,562
Pool #RA3046 2.000% 7/01/50		24,269		19,322
Pool #SD8128 2.000% 2/01/51		1,476,841		1,164,719
Pool #SD8140 2.000% 4/01/51		2,144,337		1,685,783
Pool #RA5258 2.000% 5/01/51		777,661		611,363
Pool #SD8146 2.000% 5/01/51		481,620		378,628
Pool #QC2565 2.000% 6/01/51		29,206		22,960
Pool #RA6505 2.000% 12/01/51		1,344,080		1,062,116
Pool #QD9658 2.000% 2/01/52		32,690		25,577
Pool #SD1217 2.000% 3/01/52		220,972		175,514
Pool #SD8204 2.000% 4/01/52		207,039		162,183
Pool #SD3580 2.000% 4/01/52		249,220		197,950
Pool #RA7324 2.000% 5/01/52		137,525		109,147
Pool #RB5149 2.500% 3/01/42		601,791		517,285
Pool #SD8089 2.500% 7/01/50		134,936		111,265
Pool #SD8099 2.500% 10/01/50		142,047		116,995
Pool #SD7535 2.500% 2/01/51		291,118		242,960
Pool #QC2902 2.500% 6/01/51		33,830		28,286
Pool #QC3425 2.500% 6/01/51		210,190		172,004
Pool #QC5575 2.500% 8/01/51		73,002		59,694
Pool #SD8161 2.500% 8/01/51		842,345		692,208
Pool #SD7548 2.500% 11/01/51		478,117		398,427
Pool #RA6623 2.500% 1/01/52		999,158		826,535
Pool #RA6766 2.500% 2/01/52		430,635		356,101
Pool #SD8200 2.500% 3/01/52		626,615		512,872
Pool #SD5421 2.500% 4/01/52		192,902		159,123
Pool #RA7135 2.500% 4/01/52		372,089		306,873
Pool #SD8205 2.500% 4/01/52		606,009		495,818
Pool #SD8212 2.500% 5/01/52		216,948		177,500
Pool #RB5163 3.000% 5/01/42		261,736		232,683
Pool #RB5162 3.000% 6/01/42		107,266		95,024
Pool #RB5166 3.000% 7/01/42		60,894		53,945
Pool #RB5173 3.000% 8/01/42		51,124		45,289
Pool #SD1497 3.000% 4/01/43		272,374		243,501
Pool #ZS4693 3.000% 12/01/46		63,410		55,440
Pool #G08756 3.000% 4/01/47		26,999		23,570
Pool #SD0080 3.000% 9/01/49		116,577		101,706
Pool #SD7531 3.000% 12/01/50		142,651		123,785
Pool #SD1183 3.000% 1/01/52		236,529		203,732
Pool #SD8220 3.000% 6/01/52		243,285		207,233
Pool #SD7555 3.000% 8/01/52		822,337		711,397
Pool #SD2879 3.000% 8/01/52		1,197,286		1,035,762
Pool #SB0015 3.500% 6/01/33		110,248		104,906
Pool #U90690 3.500% 6/01/42		41,061		37,748
Pool #U99051 3.500% 6/01/43		41,679		38,311
Pool #ZM3532 3.500% 6/01/47		161,062		145,057
Pool #ZT0179 3.500% 11/01/47		255,814		231,034
Pool #RA1202 3.500% 8/01/49		96,776		86,978
Pool #SD0212 3.500% 12/01/49		131,355		117,892
Pool #SD1361 3.500% 2/01/50		723,142		657,160
Pool #SD0617 3.500% 11/01/50		93,103		83,503
Pool #SD8264 3.500% 11/01/52		482,365		427,009

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #SB8171 4.000% 6/01/37	$	53,942	$	51,926
Pool #SB0727 4.000% 8/01/37		190,701		184,109
Pool #RA1906 4.000% 12/01/49		176,656		164,346
Pool #SD8039 4.000% 1/01/50		214,057		198,138
Pool #SD1035 4.000% 5/01/52		205,726		188,369
Pool #SD0422 4.500% 7/01/45		101,384		98,781
Pool #RA2607 4.500% 5/01/50		46,245		44,102
Pool #SD8266 4.500% 11/01/52		416,702		393,227
Pool #ZS3941 5.000% 12/01/41		31,471		31,483
Pool #QF1305 5.000% 10/01/52		68,345		66,165
Pool #SD3041 5.000% 5/01/53		106,455		102,994
Pool #SD4977 5.000% 11/01/53		322,045		311,273
Pool #SD3630 5.500% 8/01/53		1,049,680		1,039,068
Pool #SD4967 5.500% 2/01/54		297,062		294,147
Pool #SD4694 6.500% 1/01/54		133,715		136,912
Federal National Mortgage Association
Pool #MA4581 1.500% 4/01/37		595,609		509,285
Pool #MA4601 1.500% 5/01/37		503,190		430,261
Pool #FS2037 1.500% 5/01/37		515,297		440,613
Pool #MA4519 1.500% 1/01/42		537,915		435,258
Pool #BP3454 2.000% 5/01/36		437,246		385,178
Pool #BT6754 2.000% 9/01/36		372,909		327,687
Pool #FM8732 2.000% 9/01/36		273,375		243,555
Pool #MA4567 2.000% 3/01/37		2,056,475		1,807,088
Pool #MA4582 2.000% 4/01/37		248,743		218,578
Pool #MA4602 2.000% 5/01/37		369,109		324,347
Pool #FS7471 2.000% 3/01/38		452,665		397,770
Pool #MA4570 2.000% 3/01/42		195,707		162,663
Pool #MA4586 2.000% 4/01/42		916,153		761,466
Pool #FS2763 2.000% 8/01/42		44,068		36,628
Pool #FS5191 2.000% 8/01/42		51,390		42,713
Pool #CA6587 2.000% 8/01/50		104,671		83,334
Pool #MA4158 2.000% 10/01/50		251,738		198,534
Pool #MA4208 2.000% 12/01/50		2,249,787		1,774,307
Pool #MA4237 2.000% 1/01/51		522,906		412,392
Pool #MA4255 2.000% 2/01/51		1,578,241		1,244,689
Pool #MA4281 2.000% 3/01/51		1,716,001		1,353,334
Pool #MA4305 2.000% 4/01/51		1,594,421		1,253,463
Pool #MA4325 2.000% 5/01/51		3,157,724		2,482,462
Pool #CB2357 2.000% 12/01/51		1,085,392		857,696
Pool #MA4511 2.000% 1/01/52		355,465		278,451
Pool #CB2766 2.000% 2/01/52		337,995		266,878
Pool #CB2848 2.000% 2/01/52		543,870		429,436
Pool #FS0733 2.000% 2/01/52		477,558		379,017
Pool #MA4547 2.000% 2/01/52		466,846		365,569
Pool #FS1618 2.000% 3/01/52		247,962		196,796
Pool #MA4562 2.000% 3/01/52		1,798,403		1,408,767
Pool #MA4577 2.000% 4/01/52		588,718		461,168
Pool #FS1571 2.000% 4/01/52		24,028		18,822
Pool #MA4622 2.000% 6/01/52		660,762		517,190
Pool #BM3859 2.500% 8/01/31		70,979		66,618
Pool #BC9043 2.500% 11/01/31		211,201		198,048
Pool #BM1890 2.500% 1/01/32		49,511		46,646
Pool #FS4477 2.500% 5/01/37		632,140		573,913
Pool #FS7780 2.500% 5/01/37		267,682		243,026
Pool #MA4665 2.500% 7/01/37		362,995		327,744
Pool #CB4726 2.500% 9/01/37		117,013		105,759
Pool #FS4054 2.500% 2/01/38		43,780		39,528

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #MA4078 2.500% 7/01/50	$	26,123	$	21,540
Pool #CA7026 2.500% 9/01/50		1,263,075		1,057,288
Pool #MA4326 2.500% 5/01/51		842,249		692,918
Pool #CB0414 2.500% 5/01/51		78,917		65,344
Pool #BT0163 2.500% 6/01/51		44,477		37,189
Pool #MA4356 2.500% 6/01/51		796,647		654,654
Pool #BT1265 2.500% 6/01/51		313,096		256,214
Pool #MA4379 2.500% 7/01/51		520,523		427,747
Pool #CB1331 2.500% 8/01/51		664,197		549,133
Pool #CB1280 2.500% 8/01/51		59,408		49,116
Pool #CB1866 2.500% 10/01/51		1,040,614		859,040
Pool #CB2045 2.500% 11/01/51		42,763		35,596
Pool #CB2635 2.500% 1/01/52		1,126,493		924,126
Pool #CB2538 2.500% 1/01/52		979,446		810,229
Pool #CB2638 2.500% 1/01/52		1,158,582		955,519
Pool #MA4512 2.500% 1/01/52		28,446		23,277
Pool #CB2804 2.500% 2/01/52		675,187		558,325
Pool #FS2573 2.500% 3/01/52		77,360		64,345
Pool #FS4283 2.500% 3/01/52		55,700		46,051
Pool #BV4119 2.500% 3/01/52		216,418		177,404
Pool #MA4578 2.500% 4/01/52		1,974,405		1,615,397
Pool #FS2477 2.500% 5/01/52		834,825		689,159
Pool #MA4623 2.500% 6/01/52		252,625		206,690
Pool #AS7056 3.000% 4/01/31		156,723		149,591
Pool #BM5111 3.000% 11/01/33		77,114		72,823
Pool #CA4885 3.000% 12/01/34		294,432		275,198
Pool #BO7256 3.000% 1/01/35		151,767		141,616
Pool #FM2547 3.000% 2/01/35		91,079		85,129
Pool #FM8540 3.000% 11/01/35		158,193		150,501
Pool #AL9412 3.000% 11/01/36		179,686		164,738
Pool #FS7636 3.000% 4/01/37		484,089		460,562
Pool #CA5597 3.000% 4/01/40		309,881		281,779
Pool #MA4632 3.000% 6/01/42		27,909		24,724
Pool #MA4695 3.000% 7/01/42		161,573		143,134
Pool #BM4221 3.000% 1/01/43		110,227		98,309
Pool #BM5468 3.000% 2/01/43		164,570		146,796
Pool #AB9248 3.000% 5/01/43		40,990		36,591
Pool #AU1629 3.000% 7/01/43		11,992		10,683
Pool #AS0406 3.000% 9/01/43		67,031		59,596
Pool #BM5469 3.000% 3/01/44		305,461		272,338
Pool #BM3380 3.000% 6/01/46		275,988		244,949
Pool #MA2670 3.000% 7/01/46		96,708		84,673
Pool #AS8295 3.000% 11/01/46		239,013		209,868
Pool #MA2806 3.000% 11/01/46		183,681		160,594
Pool #FM1000 3.000% 4/01/47		153,625		134,316
Pool #MA2956 3.000% 4/01/47		120,276		104,858
Pool #BM1418 3.000% 4/01/47		1,219,277		1,066,027
Pool #BM4744 3.000% 6/01/47		105,349		92,503
Pool #FM1572 3.000% 9/01/48		218,359		190,914
Pool #FM5499 3.000% 2/01/49		142,901		124,940
Pool #FM1445 3.000% 8/01/49		102,759		89,650
Pool #CA4108 3.000% 9/01/49		653,831		568,791
Pool #FM2870 3.000% 3/01/50		186,005		161,580
Pool #CA5540 3.000% 4/01/50		12,446		10,789
Pool #CA6314 3.000% 7/01/50		178,325		152,067
Pool #BQ1348 3.000% 8/01/50		104,404		90,042
Pool #CA6738 3.000% 8/01/50		203,537		175,538
Pool #BQ5052 3.000% 9/01/50		6,629		5,717

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #FM7072 3.000% 4/01/51	$	599,938	$	519,471
Pool #FS0957 3.000% 3/01/52		38,784		33,073
Pool #FS1538 3.000% 4/01/52		1,488,295		1,277,513
Pool #FM3462 3.500% 12/01/33		239,899		228,972
Pool #AS4449 3.500% 2/01/35		83,762		79,365
Pool #FM3340 3.500% 5/01/35		6,660		6,348
Pool #FM8137 3.500% 9/01/35		70,403		67,241
Pool #MA1283 3.500% 12/01/42		35,459		32,528
Pool #MA1373 3.500% 3/01/43		53,797		49,315
Pool #MA1437 3.500% 5/01/43		49,378		45,227
Pool #MA1546 3.500% 8/01/43		121,650		111,405
Pool #AL6167 3.500% 1/01/44		480,627		440,656
Pool #AS5182 3.500% 6/01/45		311,808		282,188
Pool #BC1747 3.500% 1/01/46		789,126		713,672
Pool #FS1400 3.500% 7/01/47		21,379		19,711
Pool #BM4582 3.500% 8/01/47		92,177		83,421
Pool #BM3122 3.500% 10/01/47		291,285		263,069
Pool #CA0858 3.500% 12/01/47		42,767		38,464
Pool #MA3210 3.500% 12/01/47		29,752		26,768
Pool #MA3238 3.500% 1/01/48		182,542		164,175
Pool #BH9277 3.500% 2/01/48		322,883		290,294
Pool #FM1001 3.500% 11/01/48		38,681		34,802
Pool #FM8196 3.500% 12/01/48		644,287		580,265
Pool #FM3972 3.500% 7/01/50		223,998		199,080
Pool #FM8086 3.500% 7/01/51		104,669		92,707
Pool #MA4514 3.500% 1/01/52		444,856		394,423
Pool #BV3533 3.500% 2/01/52		36,231		32,178
Pool #FS1694 4.000% 7/01/35		100,447		97,790
Pool #FS1883 4.000% 6/01/37		117,402		113,050
Pool #BF0198 4.000% 11/01/40		85,320		81,202
Pool #MA0639 4.000% 2/01/41		277,494		263,448
Pool #BM3385 4.000% 6/01/45		456,617		428,081
Pool #FS1042 4.000% 9/01/45		453,390		430,108
Pool #FM2673 4.000% 10/01/45		689,418		653,542
Pool #FS2119 4.000% 3/01/46		80,007		75,878
Pool #AL8387 4.000% 3/01/46		490,207		459,266
Pool #MA3088 4.000% 8/01/47		26,554		24,687
Pool #MA3121 4.000% 9/01/47		246,228		228,917
Pool #MA3467 4.000% 9/01/48		3,421		3,176
Pool #BM5527 4.000% 10/01/48		85,676		79,947
Pool #BM5147 4.000% 10/01/48		20,829		19,481
Pool #FM3664 4.000% 3/01/49		323,968		300,685
Pool #CA3503 4.000% 5/01/49		44,862		41,596
Pool #CA4571 4.000% 11/01/49		70,936		65,705
Pool #CA4823 4.000% 12/01/49		92,589		85,761
Pool #FS1792 4.000% 5/01/52		195,395		179,887
Pool #CB4379 4.000% 8/01/52		198,770		181,860
Pool #MA4700 4.000% 8/01/52		67,171		61,519
Pool #MA4732 4.000% 9/01/52		481,201		440,565
Pool #MA4804 4.000% 11/01/52		30,436		27,856
Pool #MA4839 4.000% 12/01/52		168,688		154,390
Pool #AL0065 4.500% 4/01/41		162,525		158,203
Pool #AI1888 4.500% 5/01/41		178,161		173,376
Pool #AL0160 4.500% 5/01/41		227,769		221,769
Pool #AL6536 4.500% 3/01/45		247,020		238,663
Pool #BM4185 4.500% 9/01/46		133,228		128,637
Pool #FM2899 4.500% 11/01/46		292,254		284,652
Pool #FM5708 4.500% 5/01/47		145,089		141,179

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #BM3148 4.500% 11/01/47	$	119,532	$	115,226
Pool #BM4343 4.500% 5/01/48		118,322		114,023
Pool #CA2207 4.500% 8/01/48		26,780		25,589
Pool #CA5186 4.500% 1/01/50		24,362		23,248
Pool #CA5696 4.500% 5/01/50		63,604		60,617
Pool #FS4297 4.500% 2/01/51		204,132		194,993
Pool #MA4656 4.500% 7/01/52		617,880		583,458
Pool #MA4701 4.500% 8/01/52		546,754		516,295
Pool #MA4805 4.500% 11/01/52		195,739		184,712
Pool #FS5865 4.500% 1/01/53		501,170		472,937
Pool #AD6438 5.000% 6/01/40		39,594		39,605
Pool #FM8543 5.000% 11/01/44		170,982		171,073
Pool #AL9893 5.000% 2/01/45		220,684		219,854
Pool #FM4212 5.000% 12/01/47		333,863		333,086
Pool #FS1510 5.000% 10/01/48		256,501		256,437
Pool #FS2620 5.000% 8/01/52		42,679		41,372
Pool #BW7752 5.000% 10/01/52		97,735		94,618
Pool #BY0545 5.000% 5/01/53		381,570		368,938
Pool #BY4131 5.000% 7/01/53		150,662		145,674
Pool #MA5071 5.000% 7/01/53		1,026,440		992,428
Pool #CB7095 5.000% 9/01/53		311,199		301,276
Pool #BM3279 5.500% 5/01/44		512,622		520,915
Pool #CB5294 5.500% 11/01/52		745,471		738,156
Pool #MA4941 5.500% 3/01/53		245,608		242,430
Pool #MA5107 5.500% 8/01/53		851,092		839,815
Pool #CB7333 5.500% 10/01/53		302,399		299,527
Pool #CB7982 5.500% 2/01/54		202,103		200,120
Pool #BM4971 6.000% 7/01/41		152,260		157,062
Pool #MA4876 6.000% 12/01/52		570,782		573,761
Pool #FS3820 6.000% 1/01/53		686,166		696,610
Pool #CB5702 6.000% 2/01/53		757,191		768,715
Pool #FS5460 6.000% 5/01/53		133,208		135,278
Pool #CB7120 6.000% 9/01/53		248,958		250,958
Pool #MA5247 6.000% 1/01/54		1,573,727		1,578,991
Pool #CB8772 6.000% 6/01/54		369,995		371,348
Pool #CB7346 6.500% 10/01/53		90,695		92,756
Pool #FS6347 6.500% 11/01/53		673,650		689,759
Pool #CB7866 6.500% 1/01/54		229,571		235,060
Government National Mortgage Association Pool #AA5821 3.000% 11/15/42		34,925		31,285
Government National Mortgage Association II
Pool #MA7736 1.500% 12/20/36		58,997		50,538
Pool #MA7796 1.500% 1/20/37		79,136		67,790
Pool #MA8015 1.500% 5/20/37		135,913		116,427
Pool #MA7135 2.000% 1/20/51		1,802,660		1,460,728
Pool #MA7192 2.000% 2/20/51		439,555		356,179
Pool #MA7254 2.000% 3/20/51		466,028		377,485
Pool #MA7471 2.000% 7/20/51		1,674,234		1,356,139
Pool #MA7826 2.000% 1/20/52		443,615		359,054
Pool #MA7935 2.000% 3/20/52		1,208,765		978,350
Pool #MA6819 2.500% 8/20/50		282,295		238,175
Pool #MA7312 2.500% 4/20/51		346,119		291,376
Pool #MA7589 2.500% 9/20/51		1,401,415		1,178,887
Pool #MA7649 2.500% 10/20/51		2,200,242		1,850,182
Pool #MA7705 2.500% 11/20/51		555,982		467,525
Pool #MA7936 2.500% 3/20/52		1,305,064		1,097,835
Pool #MA2600 3.000% 2/20/45		68,274		60,485
Pool #MA2891 3.000% 6/20/45		552,058		488,385

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #MA3662 3.000% 5/20/46	$	88,131	$	77,829
Pool #MA3802 3.000% 7/20/46		42,134		37,182
Pool #MA3873 3.000% 8/20/46		244,865		216,087
Pool #MA4195 3.000% 1/20/47		298,291		263,141
Pool #MA6144 3.000% 9/20/49		11,682		9,966
Pool #MA6209 3.000% 10/20/49		73,776		62,938
Pool #MA6399 3.000% 1/20/50		38,275		32,652
Pool #MA6531 3.000% 3/20/50		123,287		105,176
Pool #MA6589 3.000% 4/20/50		55,405		47,041
Pool #MA6757 3.000% 7/20/50		97,725		82,972
Pool #MA7473 3.000% 7/20/51		910,251		794,242
Pool #MA7650 3.000% 10/20/51		1,216,380		1,062,021
Pool #MA7937 3.000% 3/20/52		234,277		204,254
Pool #MA8098 3.000% 6/20/52		653,154		569,452
Pool #MA0318 3.500% 8/20/42		138,247		127,668
Pool #MA0852 3.500% 3/20/43		98,681		91,025
Pool #783802 3.500% 4/20/43		14,903		13,666
Pool #MA1012 3.500% 5/20/43		294,793		270,555
Pool #MA1090 3.500% 6/20/43		116,458		107,363
Pool #785587 3.500% 12/20/44		198,236		182,542
Pool #AL1773 3.500% 1/20/45		143,877		131,183
Pool #MA3173 3.500% 10/20/45		190,520		173,949
Pool #MA3310 3.500% 12/20/45		62,775		57,315
Pool #MA3597 3.500% 4/20/46		92,468		84,339
Pool #MA3663 3.500% 5/20/46		71,601		65,307
Pool #MA3736 3.500% 6/20/46		193,388		176,206
Pool #MA3803 3.500% 7/20/46		13,944		12,705
Pool #MA3937 3.500% 9/20/46		92,266		83,953
Pool #786092 3.500% 1/20/47		129,407		118,233
Pool #MA4382 3.500% 4/20/47		544,795		495,028
Pool #MA4586 3.500% 7/20/47		31,626		28,717
Pool #784346 3.500% 7/20/47		21,387		19,507
Pool #BC1919 3.500% 9/20/47		43,362		39,306
Pool #MA4719 3.500% 9/20/47		11,087		10,060
Pool #784793 3.500% 12/20/47		5,692		5,170
Pool #MA4900 3.500% 12/20/47		151,541		137,461
Pool #785087 3.500% 2/20/48		506,351		461,361
Pool #784472 3.500% 2/20/48		252,322		229,351
Pool #785327 3.500% 10/20/49		58,047		52,572
Pool #MA3245 4.000% 11/20/45		135,313		127,157
Pool #MA4511 4.000% 6/20/47		82,663		77,474
Pool #MA4720 4.000% 9/20/47		293,117		274,260
Pool #MA4838 4.000% 11/20/47		72,486		67,822
Pool #MA6934 4.000% 10/20/50		697,288		647,853
Pool #MA8346 4.000% 10/20/52		1,737,482		1,605,479
Pool #5234 4.500% 11/20/41		117,029		114,124
Pool #MA2894 4.500% 6/20/45		124,343		120,830
Pool #MA2963 4.500% 7/20/45		47,673		46,327
Pool #MA3312 4.500% 12/20/45		2,284		2,218
Pool #MA4588 4.500% 7/20/47		219,060		212,119
Pool #MA4654 4.500% 8/20/47		34,479		33,344
Pool #MA5079 4.500% 3/20/48		51,354		49,630
Pool #MA5265 4.500% 6/20/48		178		171
Pool #MA5399 4.500% 8/20/48		43,607		41,993
Pool #MA5711 4.500% 1/20/49		70,702		67,932
Pool #786255 4.500% 9/20/49		65,109		62,659
Pool #MA8347 4.500% 10/20/52		753,719		717,116
Pool #MA8799 4.500% 4/20/53		270,282		257,135

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #MA4781 5.000% 10/20/47	$	237,050	$	236,359
Pool #MA5194 5.000% 5/20/48		47,709		47,286
Pool #BF2644 5.000% 5/20/48		4,517		4,459
Pool #MA5266 5.000% 6/20/48		333,115		328,917
Pool #BF2878 5.000% 6/20/48		15,264		15,067
Pool #MA5988 5.000% 6/20/49		138,691		136,683
Pool #MA6042 5.000% 7/20/49		193,075		190,642
Pool #MA5081 5.500% 3/20/48		37,373		38,113
Pool #MA5140 5.500% 4/20/48		28,184		28,742
Pool #MA5195 5.500% 5/20/48		82,999		84,641
Pool #MA5469 5.500% 9/20/48		329		335
Pool #MA5531 5.500% 10/20/48		7,679		7,799
Pool #MA5598 5.500% 11/20/48		37,292		37,878
Pool #MA5654 5.500% 12/20/48		99,947		101,144
Pool #MA5713 5.500% 1/20/49		26,122		26,288
Pool #MA5820 5.500% 3/20/49		28,420		28,867
Government National Mortgage Association II, TBA
2.500% 7/20/54 (g)		720,000		605,512
5.000% 7/20/54 (g)		730,000		710,759
5.500% 7/20/54 (g)		1,525,000		1,513,028
6.000% 7/20/54 (g)		445,000		446,912
6.500% 7/20/54 (g)		755,000		765,484
Uniform Mortgage-Backed Security, TBA
3.500% 7/01/54 (g)		920,000		814,271
5.000% 7/01/54 (g)		1,175,000		1,135,573
5.500% 7/01/54 (g)		290,000		286,024
6.000% 7/01/54 (g)		1,195,000		1,198,362
6.500% 7/01/54 (g)		1,150,000		1,170,394
				117,083,439
Whole Loans — 0.1%
Federal Home Loan Mortgage Corp. STACR REMICS Trust, Series 2024-DNA2, Class A1, 30 day USD SOFR Average + 1.250%
6.585% FRN 5/25/44 (b)		300,745		301,591
Federal National Mortgage Association Connecticut Avenue Securities, Series 2017-C06, Class 1M2B, 30 day USD SOFR Average + 2.764%
8.100% FRN 2/25/30		148,996		150,479
				452,070
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $125,309,563)				117,750,978
U.S. TREASURY OBLIGATIONS — 22.3%
U.S. Treasury Bonds & Notes — 22.3%
U.S. Treasury Bonds
3.375% 8/15/42		9,575,000		8,087,574
3.875% 2/15/43 (j)		3,020,000		2,729,562
4.000% 11/15/42 (j)		8,030,000		7,400,739
4.250% 2/15/54		7,625,000		7,260,430
4.500% 2/15/44		6,360,000		6,266,588
4.625% 5/15/54		250,000		253,440
U.S. Treasury Inflation-Indexed Notes
1.375% 7/15/33		2,933,976		2,770,323
1.750% 1/15/34		13,640,610		13,234,676
U.S. Treasury Notes
0.625% 8/15/30		5,720,000		4,579,899
1.500% 1/31/27		22,645,000		20,952,746

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3.125% 8/31/27	$	2,660,000	$	2,552,052
3.875% 11/30/27		1,100,000		1,078,773
4.125% 6/15/26		2,875,000		2,841,790
4.125% 9/30/27		5,655,000		5,590,940
4.125% 10/31/27		1,400,000		1,384,250
4.250% 2/28/29 (d)		2,115,000		2,105,053
4.375% 5/15/34		1,035,000		1,035,324
4.500% 5/31/29 (d)		1,855,000		1,867,329
4.500% 11/15/33		865,000		872,949
4.625% 2/28/26		555,000		553,005
4.625% 9/15/26		7,588,400		7,578,115
4.625% 10/15/26 (j)		12,135,000		12,123,336
4.625% 9/30/28		6,710,000		6,765,568
4.875% 5/31/26		2,195,000		2,199,194
				122,083,655
TOTAL U.S. TREASURY OBLIGATIONS (Cost $124,204,020)				122,083,655
TOTAL BONDS & NOTES (Cost $561,895,188)				536,911,134
TOTAL PURCHASED OPTIONS(#) — 0.0% (Cost $314,895)				242,159
TOTAL LONG-TERM INVESTMENTS (Cost $562,210,083)				537,153,293
	Number of Shares
SHORT-TERM INVESTMENTS — 3.5%
Investment of Cash Collateral from Securities Loaned — 0.1%
State Street Navigator Securities Lending Government Money Market Portfolio (k)		281,295		281,295
Mutual Fund — 1.8%
T. Rowe Price Government Reserve Investment Fund		10,007,825		10,007,825
	Principal Amount
Sovereign Debt Obligations — 0.5%
Egypt Treasury Bills
30.000% 9/17/24 EGP (c) (l)	$	11,350,000		224,240
31.000% 12/10/24 EGP (c) (l)		9,875,000		184,592
31.500% 12/10/24 EGP (c) (l)		9,900,000		185,060
Japan Treasury Discount Bills, 0.000%, 8/13/24 (c) (l)		353,700,000		2,198,343
U.S. Treasury Bill — 1.1%
U.S. Treasury Bills
5.339% 7/16/24 (l)		4,410,000		4,400,344
5.361% 11/21/24 (l)		1,492,000		1,461,519
TOTAL SHORT-TERM INVESTMENTS (Cost $19,085,970)				18,943,218

MassMutual Select T. Rowe Price Bond Asset Fund —  Portfolio of Investments (Continued)

	Value
TOTAL INVESTMENTS — 101.8% (Cost $581,296,053) (m)	$	556,096,511
Other Assets/(Liabilities) — (1.8)%		(9,713,123)
NET ASSETS — 100.0%	$	546,383,388

Abbreviation Legend

CDOR Canadian Dollar Offered Rate

CLO Collateralized Loan Obligation

CMT Constant Maturity Treasury Index

EURIBOR Euro Inter-Bank Offered Rate

FRN Floating Rate Note

ICE Inter-Continental Exchange

LIBOR London InterBank Offered Rate

OAT Obligations Assimilables du Tresor

REMICS Real Estate Mortgage Investment Conduits

SOFR Secured Overnight Financing Rate

SONIA Sterling Overnight Index Average

STEP Step Coupon 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 bank loan commitments at June 30, 2024 where the rate will be determined at time of settlement.

(b) 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 June 30, 2024, the aggregate market value of these securities amounted to $138,161,633 or 25.29% of net assets.

(c) The principal amount of the security is in foreign currency. The market value is in U.S. dollars.

(d) Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2024, was $4,285,756 or 0.78% of net assets. The Fund received $4,097,343 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) Security is currently in default due to bankruptcy or failure to make payment of principal or interest of the issuer. Income is not being accrued. At June 30, 2024, these securities amounted to a value of $400,370 or 0.07% of net assets.

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

(h) 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 June 30, 2024.

(i) 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.

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

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

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

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

(#) OTC Options Purchased
Description	Counterparty	Expiration Date		Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid/(Received)		Unrealized Appreciation (Depreciation)
Call
USD Call GPB Put	Citibank N.A.		8/08/24		1.26		2,924,000	USD	2,924,000	$	16,170	$	13,860	$	2,310
USD Call JPY Put	HSBC Bank USA		7/29/24		158.50		1,458,000	USD	1,458,000		24,299		9,174		15,125
USD Call JPY Put	HSBC Bank USA		7/29/24		158.50		1,090,000	USD	1,090,000		18,166		6,477		11,689
										$	58,635	$	29,511	$	29,124
Put
USD Put GBP Call	Citibank N.A.		8/08/24		1.30		2,924,000	USD	2,924,000	$	1,977	$	12,778	$	(10,801)
										$	60,612	$	42,289	$	18,323

(#) Credit Default Index Swaptions Purchased

Paid by Fund

Received by Fund

Description

Counterparty

Expiration Date

Exercise Rate

Rate/ Reference Obligation Index

Frequency

Rate/ Reference Obligation Index

Frequency

Notional Amount

Value

Premiums Paid/(Received)

Unrealized Appreciation (Depreciation)

Put

Sell Protection on 5-Year Credit Default Swap, 6/20/29

Morgan Stanley & Co. LLC

8/21/24

0.63

iTraxx Europe Series 41†

Quarterly

Fixed 1.000%

Quarterly

EUR

20,175,000

$

53,459

$

19,003

$

34,456

(#) 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

30-Year Interest Rate Swap, 8/12/54

Barclays Bank PLC

8/08/24

3.80%##

Annually

1-Day USD SOFR

Annually

USD

1,278,000

$

20,152

$

39,618

$

(19,466)

30-Year Interest Rate Swap, 8/13/54

Barclays Bank PLC

8/09/24

3.80%##

Annually

1-Day USD SOFR

Annually

USD

2,254,000

36,073

73,030

(36,957)

30-Year Interest Rate Swap, 8/13/54

Goldman Sachs International

8/09/24

3.80%##

Annually

1-Day USD SOFR

Annually

USD

1,127,000

18,036

35,275

(17,239)

30-Year Interest Rate Swap, 8/12/54

Morgan Stanley & Co. LLC

8/08/24

3.80%##

Annually

1-Day USD SOFR

Annually

USD

1,127,000

17,771

34,373

(16,602)

30-Year Interest Rate Swap, 8/13/54

Morgan Stanley & Co. LLC

8/09/24

3.80%##

Annually

1-Day USD SOFR

Annually

USD

2,253,000

36,056

71,307

(35,251)

128,088

253,603

(125,515)

Credit Default Index Swaptions Written

Paid by Fund

Received by Fund

Description

Counterparty

Expiration Date

Exercise Rate

Rate/ Reference Obligation Index

Frequency

Rate/ Reference Obligation Index

Frequency

Notional Amount

Value

Premiums Paid/(Received)

Unrealized Appreciation (Depreciation)

Call

Buy Protection on 5-Year Credit Default Swap, 6/20/29

Morgan Stanley & Co LLC

8/21/24

0.50

iTraxx Europe Series 41†

Quarterly

Fixed 1.000%

Quarterly

EUR

20,175,000

$

(2,383)

$

(15,048)

$

12,665

Interest Rate Swaptions Written

Paid by Fund

Received by Fund

Description

Counterparty

Expiration Date

Rate

Frequency

Rate

Frequency

Notional Amount

Value

Premium Paid/ (Received)

Unrealized Appreciation (Depreciation)

Put

2-Year Interest Rate Swap, 8/12/26

Barclays Bank PLC

8/08/24

4.20%##

Annually

1-Day USD SOFR

Annually

USD

6,413,000

$

(5,946)

$

(23,247)

$

17,301

2-Year Interest Rate Swap, 8/13/26

Barclays Bank PLC

8/09/24

4.20%##

Annually

1-Day USD SOFR

Annually

USD

11,363,000

(10,897)

(43,747)

32,850

2-Year Interest Rate Swap, 8/13/26

Goldman Sachs International

8/09/24

4.20%##

Annually

1-Day USD SOFR

Annually

USD

5,594,000

(5,365)

(20,698)

15,333

2-Year Interest Rate Swap, 8/12/26

Morgan Stanley & Co. LLC

8/08/24

4.20%##

Annually

1-Day USD SOFR

Annually

USD

5,839,000

(5,414)

(20,583)

15,169

2-Year Interest Rate Swap, 8/13/26

Morgan Stanley & Co. LLC

8/09/24

4.20%##

Annually

1-Day USD SOFR

Annually

USD

11,363,000

(10,897)

(43,747)

32,850

(38,519)

(152,022)

113,503

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
Bank of America N.A.	7/05/24	INR	21,969,318	USD	263,043	$	394
Bank of America N.A.	7/12/24	MXN	14,183,000	USD	824,540		(50,456)
Bank of America N.A.	7/12/24	HUF	22,916,925	USD	61,916		197
Bank of America N.A.	7/12/24	USD	774,085	HUF	276,910,000		23,558
Bank of America N.A.	7/12/24	USD	710,835	CZK	16,214,000		17,548
Bank of America N.A.	7/12/24	USD	1,664,616	MXN	28,681,602		99,224
Bank of America N.A.	7/19/24	CAD	706,000	USD	517,368		(1,103)
Bank of America N.A.	7/19/24	NOK	6,705,000	USD	604,394		23,867
Bank of America N.A.	7/19/24	USD	610,775	CAD	840,000		(3,478)
Bank of America N.A.	7/19/24	USD	77,953	NOK	844,000		(1,131)
Bank of America N.A.	7/19/24	USD	753,061	CHF	674,000		1,349
Bank of America N.A.	8/16/24	PLN	5,708,000	USD	1,435,276		(18,057)
Bank of America N.A.	8/23/24	EUR	460,399	USD	495,301		(1,019)
Bank of America N.A.	8/30/24	USD	84,614	SEK	892,000		206
Bank of America N.A.	9/06/24	USD	3,783,186	MYR	17,635,122		29,107
Bank of America N.A.	10/11/24	USD	262,208	INR	21,969,318		(413)
Barclays Bank PLC	7/05/24	KRW	2,075,854,000	USD	1,548,024		(39,699)
Barclays Bank PLC	7/05/24	INR	128,376,000	USD	1,537,037		2,336
Barclays Bank PLC	7/05/24	TWD	10,354,074	USD	320,341		(1,081)
Barclays Bank PLC	7/12/24	TRY	5,431,000	USD	153,256		11,289
Barclays Bank PLC	7/12/24	MXN	6,740,000	USD	393,531		(25,673)
Barclays Bank PLC	7/12/24	USD	234,443	TRY	8,445,000		(21,418)
Barclays Bank PLC	7/12/24	USD	376,833	ZAR	6,973,000		(6,148)
Barclays Bank PLC	7/19/24	CHF	35,000	USD	38,903		132
Barclays Bank PLC	7/19/24	USD	335,104	JPY	52,068,191		10,642
Barclays Bank PLC	8/16/24	PLN	403,583	USD	101,267		(1,063)
Barclays Bank PLC	8/23/24	USD	9,222,033	GBP	7,252,392		50,954
Barclays Bank PLC	8/23/24	USD	51,534	EUR	48,000		2
Barclays Bank PLC	8/30/24	USD	16,708	SEK	176,000		54
Barclays Bank PLC	10/15/24	USD	322,065	TWD	10,354,074		(727)
BNP Paribas SA	7/05/24	USD	1,187,014	PEN	4,418,000		37,543
BNP Paribas SA	7/05/24	IDR	27,596,539,265	USD	1,678,233		6,973
BNP Paribas SA	7/05/24	PEN	3,302,289	USD	867,211		(8,024)
BNP Paribas SA	7/05/24	USD	1,426,834	KRW	1,977,720,000		(10,187)
BNP Paribas SA	7/12/24	USD	436,224	CZK	10,337,292		(5,783)
BNP Paribas SA	7/12/24	USD	2,052,266	HUF	734,534,490		61,410
BNP Paribas SA	7/12/24	ZAR	6,733,286	USD	358,596		11,219
BNP Paribas SA	7/12/24	MXN	1,297,268	USD	70,236		567
BNP Paribas SA	7/12/24	HUF	209,534,457	USD	573,869		(5,954)
BNP Paribas SA	7/12/24	CZK	84,789,046	USD	3,633,446		(7,990)
BNP Paribas SA	7/12/24	USD	790,745	MXN	13,192,000		70,749
BNP Paribas SA	7/19/24	JPY	87,065,000	USD	561,560		(19,015)
BNP Paribas SA	7/19/24	AUD	120,000	USD	78,477		1,611
BNP Paribas SA	7/19/24	NZD	204,418	USD	122,962		1,549
BNP Paribas SA	7/19/24	USD	9,737	JPY	1,516,000		290
BNP Paribas SA	7/19/24	USD	742,207	AUD	1,120,000		(5,282)
BNP Paribas SA	7/19/24	USD	724,305	EUR	672,000		4,054
BNP Paribas SA	9/04/24	BRL	1,313,095	USD	253,200		(19,946)
BNP Paribas SA	9/04/24	USD	1,276,959	BRL	6,641,849		97,122
BNP Paribas SA	9/06/24	USD	1,585,406	MYR	7,372,140		16,061
BNP Paribas SA	9/06/24	USD	1,521,450	COP	5,952,444,125		101,720
BNP Paribas SA	9/06/24	USD	1,031,165	THB	37,765,655		(3,405)
BNP Paribas SA	9/13/24	USD	2,479,363	SGD	3,325,351		18,654
BNP Paribas SA	9/20/24	EUR	442,675	USD	475,012		885
BNP Paribas SA	10/11/24	KRW	1,977,720,000	USD	1,434,679		10,434
BNP Paribas SA	10/11/24	USD	1,673,454	IDR	27,596,539,265		(8,815)
BNP Paribas SA	10/11/24	USD	866,983	PEN	3,302,289		7,910
BNP Paribas SA	10/18/24	USD	3,641,717	CZK	84,789,046		7,191
Citibank N.A.	7/05/24	IDR	1,366,893,000	USD	83,843		(373)
Citibank N.A.	7/05/24	TWD	23,502,000	USD	734,116		(9,450)
Citibank N.A.	7/05/24	INR	9,192,172	USD	110,178		46
Citibank N.A.	7/05/24	USD	365,697	TWD	11,849,000		342
Citibank N.A.	7/12/24	TRY	11,835,000	USD	333,926		24,644
Citibank N.A.	7/12/24	HUF	707,930,845	USD	1,965,713		(46,962)
Citibank N.A.	7/12/24	USD	227,932	TRY	7,718,000		(5,903)
Citibank N.A.	7/12/24	USD	1,846,814	CZK	42,769,000		18,073
Citibank N.A.	7/19/24	JPY	122,604,000	USD	801,749		(37,743)
Citibank N.A.	7/19/24	NZD	240,000	USD	142,439		3,745
Citibank N.A.	7/19/24	NOK	217,000	USD	20,688		(355)
Citibank N.A.	7/19/24	USD	16,822	NOK	182,492		(277)
Citibank N.A.	7/19/24	USD	366,655	JPY	56,601,000		13,946
Citibank N.A.	7/19/24	USD	22,061	CHF	20,000		(245)
Citibank N.A.	7/19/24	AUD	96,409	USD	64,140		204
Citibank N.A.	7/19/24	USD	440,953	CAD	602,167		617
Citibank N.A.	8/09/24	USD	395,302	CLP	371,394,000		746
Citibank N.A.	8/23/24	EUR	1,658,296	USD	1,807,130		(26,794)
Citibank N.A.	9/04/24	EGP	13,906,000	USD	305,379		(23,300)
Citibank N.A.	10/11/24	USD	109,824	INR	9,192,172		(59)
Citibank N.A.	3/04/25	EGP	2,595,000	USD	49,665		(688)
Citibank N.A.	3/12/25	EGP	8,701,000	USD	155,542		8,237
Deutsche Bank AG	7/05/24	TWD	3,322,000	USD	102,791		(360)
Deutsche Bank AG	7/05/24	IDR	3,000,000,000	USD	185,707		(2,509)
Deutsche Bank AG	7/05/24	USD	2,696,921	IDR	42,949,058,395		74,202
Deutsche Bank AG	7/12/24	ZAR	7,817,542	USD	424,221		5,145
Deutsche Bank AG	7/12/24	USD	598,058	HUF	218,717,000		5,255
Deutsche Bank AG	7/19/24	USD	1,016,440	JPY	157,566,000		34,569
Deutsche Bank AG	7/19/24	USD	6,616	AUD	10,000		(58)
Deutsche Bank AG	7/19/24	EUR	672,000	USD	722,121		(1,870)
Deutsche Bank AG	7/19/24	JPY	210,330,018	USD	1,359,937		(49,267)
Deutsche Bank AG	7/19/24	USD	26,348	NOK	282,000		(76)
Deutsche Bank AG	8/16/24	USD	599,566	PLN	2,390,435		6,054
Deutsche Bank AG	8/23/24	USD	18,550	EUR	17,000		299
Deutsche Bank AG	8/23/24	EUR	372,134	USD	404,901		(5,381)
Deutsche Bank AG	8/30/24	USD	12,699	SEK	135,000		(76)
Deutsche Bank AG	9/13/24	USD	560,167	CNH	4,063,685		582
Goldman Sachs International	7/05/24	USD	1,506,799	TWD	47,685,000		36,468
Goldman Sachs International	7/05/24	TWD	25,043,926	USD	774,249		(2,038)
Goldman Sachs International	7/12/24	TRY	11,138,000	USD	308,831		28,621
Goldman Sachs International	7/19/24	NOK	8,459,000	USD	793,538		(926)
Goldman Sachs International	7/19/24	NZD	69,000	USD	42,505		(477)
Goldman Sachs International	7/19/24	USD	36,097	NZD	60,000		(449)

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
Goldman Sachs International	7/19/24	JPY	76,388,703	USD	484,010	$	(7,994)
Goldman Sachs International	7/19/24	USD	1,909,437	NOK	20,466,000		(8,237)
Goldman Sachs International	7/19/24	USD	50,549	CAD	69,000		92
Goldman Sachs International	8/23/24	USD	19,309	EUR	18,000		(16)
Goldman Sachs International	9/04/24	USD	949,111	BRL	5,182,671		28,478
Goldman Sachs International	9/06/24	USD	249,347	THB	9,066,885		965
Goldman Sachs International	10/11/24	IDR	1,838,829,255	USD	111,742		352
Goldman Sachs International	10/15/24	USD	778,371	TWD	25,043,926		(2,384)
HSBC Bank USA	7/05/24	TWD	24,799,000	USD	769,901		(5,242)
HSBC Bank USA	7/05/24	USD	854,565	TWD	27,487,000		7,024
HSBC Bank USA	7/05/24	USD	392,581	IDR	6,342,359,238		5,279
HSBC Bank USA	7/05/24	USD	1,907,527	INR	159,537,491		(5,507)
HSBC Bank USA	7/05/24	IDR	11,637,323,370	USD	710,606		36
HSBC Bank USA	7/12/24	USD	750,812	CZK	17,502,544		2,428
HSBC Bank USA	7/12/24	USD	761,208	ZAR	14,574,464		(39,272)
HSBC Bank USA	7/12/24	USD	221,696	MXN	3,756,000		16,700
HSBC Bank USA	7/19/24	CAD	50,000	USD	36,560		3
HSBC Bank USA	7/19/24	USD	84,721	AUD	128,000		(707)
HSBC Bank USA	7/19/24	USD	7,364	NZD	12,000		54
HSBC Bank USA	7/19/24	USD	101,635	JPY	15,774,000		3,339
HSBC Bank USA	7/19/24	USD	939,520	CAD	1,282,252		1,868
HSBC Bank USA	8/09/24	USD	720,237	CLP	654,724,000		24,681
HSBC Bank USA	8/23/24	USD	8,894	GBP	7,000		42
HSBC Bank USA	8/23/24	USD	15,111	EUR	14,000		81
HSBC Bank USA	9/06/24	USD	1,096,622	MYR	5,127,000		5,211
HSBC Bank USA	9/13/24	USD	9,796,144	CNH	70,364,271		106,708
HSBC Bank USA	10/11/24	USD	708,777	IDR	11,637,323,370		(627)
JP Morgan Chase Bank N.A.	7/05/24	USD	72,030	KRW	98,134,000		726
JP Morgan Chase Bank N.A.	7/05/24	IDR	5,690,661,998	USD	347,734		(229)
JP Morgan Chase Bank N.A.	7/12/24	MXN	3,033,840	USD	179,111		(13,530)
JP Morgan Chase Bank N.A.	7/12/24	USD	69,416	MXN	1,191,000		4,413
JP Morgan Chase Bank N.A.	7/19/24	JPY	209,853,000	USD	1,369,337		(61,640)
JP Morgan Chase Bank N.A.	7/19/24	USD	210,496	NZD	354,476		(5,416)
JP Morgan Chase Bank N.A.	7/19/24	CHF	6,000	USD	6,753		(62)
JP Morgan Chase Bank N.A.	7/19/24	AUD	39,213	USD	25,888		282
JP Morgan Chase Bank N.A.	7/19/24	NZD	108,000	USD	66,342		(559)
JP Morgan Chase Bank N.A.	7/19/24	USD	328,092	JPY	51,456,000		7,445
JP Morgan Chase Bank N.A.	7/19/24	USD	84,582	CAD	115,812		(106)
JP Morgan Chase Bank N.A.	8/23/24	GBP	52,000	USD	66,433		(676)
JP Morgan Chase Bank N.A.	8/23/24	EUR	425,115	USD	463,041		(6,639)
JP Morgan Chase Bank N.A.	8/23/24	USD	18,492	EUR	17,000		241
JP Morgan Chase Bank N.A.	8/23/24	USD	169,439	GBP	134,000		(12)
JP Morgan Chase Bank N.A.	8/30/24	USD	106,967	SEK	1,129,000		131
JP Morgan Chase Bank N.A.	9/06/24	USD	384,717	COP	1,575,697,000		8,894
JP Morgan Chase Bank N.A.	9/13/24	USD	734,613	SGD	995,000		(1,672)
JP Morgan Chase Bank N.A.	9/13/24	USD	1,232,524	CNH	8,946,001		624
JP Morgan Chase Bank N.A.	9/20/24	USD	274,297	EUR	255,000		160
Morgan Stanley & Co. LLC	7/05/24	USD	278,695	PEN	1,038,673		8,454
Morgan Stanley & Co. LLC	7/12/24	HUF	68,211,497	USD	189,354		(4,476)
Morgan Stanley & Co. LLC	7/12/24	CZK	2,033,790	USD	88,053		(1,091)
Morgan Stanley & Co. LLC	7/19/24	USD	39,368	JPY	6,075,000		1,512
Morgan Stanley & Co. LLC	7/19/24	USD	21,034	NZD	35,000		(284)
Morgan Stanley & Co. LLC	7/19/24	CHF	8,000	USD	8,909		14
Morgan Stanley & Co. LLC	7/19/24	CAD	828,422	USD	607,038		(1,252)
Morgan Stanley & Co. LLC	7/19/24	NZD	48,000	USD	29,332		(96)
Morgan Stanley & Co. LLC	7/19/24	JPY	690,424,289	USD	4,468,321		(165,948)
Morgan Stanley & Co. LLC	7/19/24	USD	41,324	NOK	446,508		(514)
Morgan Stanley & Co. LLC	7/19/24	USD	29,123	CAD	40,000		(128)
Morgan Stanley & Co. LLC	8/09/24	USD	377,418	CLP	348,028,000		7,685
Royal Bank of Canada	7/12/24	MXN	24,752,670	USD	1,444,740		(93,782)
Royal Bank of Canada	7/19/24	NOK	4,253,000	USD	392,640		5,868
Royal Bank of Canada	7/19/24	AUD	73,598	USD	47,803		1,316
Royal Bank of Canada	7/19/24	CHF	51,000	USD	56,690		191
Royal Bank of Canada	7/19/24	USD	4,520,904	CAD	6,231,930		(36,218)
Royal Bank of Canada	7/19/24	USD	408,984	NOK	4,283,000		7,665
Royal Bank of Canada	7/19/24	JPY	120,165,000	USD	780,535		(31,728)
State Street Bank and Trust	7/12/24	HUF	79,390,319	USD	223,196		(8,020)
State Street Bank and Trust	7/12/24	ZAR	6,996,636	USD	378,821		5,458
State Street Bank and Trust	7/12/24	USD	232,909	MXN	4,031,089		12,899
State Street Bank and Trust	7/19/24	AUD	246,655	USD	162,235		2,383
State Street Bank and Trust	7/19/24	CAD	592,419	USD	433,656		(447)
State Street Bank and Trust	7/19/24	USD	1,496,973	NZD	2,486,302		(17,437)
State Street Bank and Trust	7/19/24	USD	2,808,431	AUD	4,363,819		(103,988)
State Street Bank and Trust	7/19/24	JPY	72,282,359	USD	451,695		(1,268)
State Street Bank and Trust	7/19/24	USD	13,024,793	JPY	1,967,336,818		765,350
State Street Bank and Trust	8/23/24	EUR	2,236,029	USD	2,433,827		(33,239)
State Street Bank and Trust	8/23/24	USD	2,234,253	GBP	1,755,768		13,980
State Street Bank and Trust	8/30/24	USD	2,289,637	SEK	24,270,842		(7,072)
State Street Bank and Trust	9/13/24	USD	1,321,083	CNY	9,569,734		(6,396)
UBS AG	7/05/24	USD	205,679	PEN	762,327		7,337
UBS AG	7/12/24	USD	261,950	HUF	94,543,000		5,704
UBS AG	7/19/24	CHF	195,000	USD	213,534		3,949
UBS AG	7/19/24	USD	21,964	CAD	30,000		26
UBS AG	7/19/24	AUD	1,092,378	USD	726,202		2,852
UBS AG	7/19/24	USD	13,125,653	JPY	1,985,927,433		750,362
UBS AG	7/19/24	USD	2,257,009	CHF	2,034,000		(11,510)
UBS AG	8/23/24	EUR	973,756	USD	1,062,245		(16,826)
UBS AG	8/23/24	USD	61,583,352	EUR	56,429,582		1,000,869
UBS AG	9/06/24	USD	249,636	THB	9,070,513		1,154
UBS AG	9/20/24	USD	526,373	EUR	489,976		(375)
						$	2,635,756

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/Net Unrealized Appreciation (Depreciation)
Long
EURO-SCHATZ	9/06/24		3	$	338,300	$	1,298
Euro-BOBL	9/06/24		10		1,237,710		9,305
Euro-OAT	9/06/24		21		2,788,640		(19,676)
Korea 10 Year Bond	9/13/24		52		4,312,348		17,648
Australia 3 Year Bond	9/16/24		13		917,232		(2,679)
U.S. Treasury Note 10 Year	9/19/24		40		4,395,057		4,318
U.S. Treasury Ultra Bond	9/19/24		134		16,608,862		187,201
U.S. Treasury Note 5 Year	9/30/24		289		30,674,174		126,904
						$	324,319
Short
Euro-BTP	9/06/24		3	$	(370,694)	$	284
Euro-Bund	9/06/24		9		(1,275,691)		7,064
Mini 10 Year Japanese Government Bond	9/11/24		3		(267,003)		865
Korea 3 Year Bond	9/13/24		31		(2,363,262)		(5,935)
Australia 10 Year Bond	9/16/24		2		(151,765)		241
U.S. Treasury Long Bond	9/19/24		10		(1,171,345)		(11,780)
U.S. Treasury Ultra 10 Year	9/19/24		293		(32,918,279)		(346,377)
UK Long Gilt	9/26/24		23		(2,805,152)		(31,626)
U.S. Treasury Note 2 Year	9/30/24		48		(9,773,181)		(29,319)
						$	(416,583)

Centrally Cleared Credit Default Swaps - Buy Protection
Reference Obligation/Index	Rate Paid by Fund	Payment Frequency		Termination Date		Notional Amount		Value		Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
iTraxx Europe Series 41†	1.000%		Quarterly		6/20/29	EUR	8,100,000	$	(153,395)	$	(188,076)	$	34,681
iTraxx Europe Series 41†	1.000%		Quarterly		6/20/29	EUR	5,120,000		(96,961)		(97,976)		1,015
Bombardier, Inc.	5.000%		Quarterly		6/20/28	USD	390,000		(48,488)		(15,794)		(32,694)
								$	(298,844)	$	(301,846)	$	3,002

OTC Credit Default Swaps-Buy Protection
Reference Obligation/Index	Rate Paid by Fund	Payment Frequency		Counterparty		Termination Date		Notional Amount		Value		Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
CMBX.NA.AAA Series 15†	0.500%		Monthly		Morgan Stanley & Co. LLC		11/18/64	USD	4,189,000	$	73,922	$	111,752	$	(37,830)
CMBX.NA.AAA Series 15†	0.500%		Monthly		Morgan Stanley & Co. LLC		11/18/64	USD	929,000		16,394		24,856		(8,462)
CMBX.NA.AAA Series 15†	0.500%		Monthly		Morgan Stanley & Co. LLC		11/18/64	USD	97,000		1,712		2,596		(884)
CMBX.NA.AAA Series 15†	0.500%		Monthly		Morgan Stanley & Co. LLC		11/18/64	USD	677,000		11,947		16,373		(4,426)
CMBX.NA.AAA Series 15†	0.500%		Monthly		Morgan Stanley & Co. LLC		11/18/64	USD	585,000		10,323		14,914		(4,591)
										$	114,298	$	170,491	$	(56,193)

Centrally Cleared Credit Default Swaps - Sell Protection††
Reference Obligation/ Index	Rate Received by Fund	Payment Frequency		Termination Date		Credit Rating		Notional Amount		Value		Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
Cellnex Telecom SA	5.000%		Quarterly		12/20/28		BBB-*	EUR	220,000	$	38,461	$	33,780	$	4,681
CDX.NA.HY Series 42†	5.000%		Quarterly		6/20/29		Not Rated	USD	1,404,000		88,066		99,403		(11,337)
CDX.NA.IG Series 42†	1.000%		Quarterly		6/20/29		Not Rated	USD	33,361,000		686,969		713,514		(26,545)
Republic of Mexico	1.000%		Quarterly		6/20/29		BBB*	USD	2,818,000		(12,461)		(651)		(11,810)
Freeport McMoran, Inc.	1.000%		Quarterly		6/20/29		BBB*	USD	787,000		5,297		(711)		6,008
Republic of Mexico	1.000%		Quarterly		6/20/29		BBB*	USD	6,433,000		(1,800)		18,788		(20,588)
										$	804,532	$	864,123	$	(59,591)

OTC Credit Default Swaps-Sell Protection††
Reference Obligation/Index	Rate Received by Fund	Payment Frequency		Counterparty		Credit Rating		Termination Date		Notional Amount		Value		Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
Republic of Greece	1.000%		Quarterly		Bank of America N.A.		BBB-*		12/20/24	USD	151,000	$	617	$	(4,578)	$	5,195
Republic of Greece	1.000%		Quarterly		Bank of America N.A.		BBB-*		12/20/24	USD	303,000		1,238		(9,187)		10,425
Republic of Greece	1.000%		Quarterly		Bank of America N.A.		BBB-*		12/20/24	USD	152,000		621		(10,490)		11,111
Republic of Greece	1.000%		Quarterly		Bank of America N.A.		BBB-*		12/20/29	USD	225,000		1,289		(11,045)		12,334
Republic of Greece	1.000%		Quarterly		Bank of America N.A.		BBB-*		12/20/29	USD	225,000		1,290		(11,239)		12,529
Republic of Greece	1.000%		Quarterly		Barclays Bank PLC		BBB-*		12/20/24	USD	450,000		1,839		(2,504)		4,343
Republic of Greece	1.000%		Quarterly		Citibank N.A.		BBB-*		6/20/25	USD	150,000		1,173		(9,034)		10,207
Republic of Greece	1.000%		Quarterly		Citibank N.A.		BBB-*		6/20/25	USD	75,000		587		(4,349)		4,936
Republic of Greece	1.000%		Quarterly		Citibank N.A.		BBB-*		12/20/25	USD	300,000		2,986		(281)		3,267
Republic of Vietnam	1.000%		Quarterly		Goldman Sachs International		BB+*		6/20/26	USD	550,000		3,742		4,327		(585)
Republic of Greece	1.000%		Quarterly		Morgan Stanley & Co. LLC		BBB-*		12/20/24	USD	134,000		547		(993)		1,540
Republic of Greece	1.000%		Quarterly		Morgan Stanley & Co. LLC		BBB-*		6/20/25	USD	94,000		735		(4,498)		5,233
												$	16,664	$	(63,871)	$	80,535

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 CNREPOFIX=CFXS-Reuters	Quarterly		Fixed 2.579%		Quarterly		5/15/28	CNY	4,373,000	$	16,213	$	—	$	16,213
3-Month CNREPOFIX=CFXS-Reuters	Quarterly		Fixed 2.568%		Quarterly		5/16/28	CNY	3,429,000		12,516		—		12,516
3-Month CNREPOFIX=CFXS-Reuters	Quarterly		Fixed 2.476%		Quarterly		6/01/28	CNY	20,850,000		65,678		—		65,678
6-Month EURIBOR	Semi-Annually		Fixed 3.155%		Annually		4/02/26	EUR	3,835,000		(9,607)		—		(9,607)
6-Month EURIBOR	Semi-Annually		Fixed 3.220%		Annually		4/16/26	EUR	7,725,000		(9,198)		—		(9,198)
6-Month EURIBOR	Semi-Annually		Fixed 3.380%		Annually		5/03/26	EUR	1,250,000		2,821		—		2,821
Fixed 2.059%	Annually		Eurozone Consumer Price Index		Semi Annually		5/15/26	EUR	3,350,000		(3,955)		—		(3,955)
6-Month EURIBOR	Semi-Annually		Fixed 3.367%		Annually		9/21/28	EUR	4,015,000		72,666		—		72,666
6-Month EURIBOR	Semi-Annually		Fixed 2.807%		Annually		3/04/29	EUR	2,007,000		(4,716)		167		(4,883)
6-Month EURIBOR	Semi-Annually		Fixed 2.638%		Annually		12/16/29	EUR	1,275,000		(15,862)		—		(15,862)
Fixed 2.953%	Annually		6-Month EURIBOR		Semi-Annually		9/21/53	EUR	590,000		(49,129)		—		(49,129)
Fixed 2.427%	Annually		6-Month EURIBOR		Semi-Annually		3/05/54	EUR	220,000		6,079		—		6,079
Fixed 4.225%	Annually		GBP-SONIA		Annually		6/19/27	GBP	3,150,000		5,594		(107)		5,701
INR-FBIL-MIBOR	Semi-Annually		Fixed 6.390%		Semi-Annually		5/28/29	INR	48,863,000		(1,034)		—		(1,034)
INR-FBIL-MIBOR	Semi-Annually		Fixed 6.387%		Semi-Annually		5/28/29	INR	46,947,000		(1,066)		—		(1,066)
INR-FBIL-MIBOR	Semi-Annually		Fixed 6.378%		Semi-Annually		5/28/29	INR	47,190,000		(148,502)		—		(148,502)
INR-FBIL-MIBOR	Semi-Annually		Fixed 6.576%		Semi-Annually		4/19/31	INR	14,191,000		1,170		—		1,170
INR-FBIL-MIBOR	Semi-Annually		Fixed 6.350%		Semi-Annually		6/20/31	INR	55,000,000		(3,317)		—		(3,317)
Fixed 0.418%	Annually		JPY-TONAR		Annually		8/10/28	JPY	446,535,000		22,671		—		22,671
Fixed 0.602%	Annually		JPY-TONAR		Annually		5/02/29	JPY	69,900,000		1,461		—		1,461
										$	(39,517)	$	60	$	(39,577)

* Rating represents a weighted average of the ratings of all securities included in the underlying index for the credit default swap. Ratings used in the weighted average are from Moody's Investors Service, Inc., S&P Global Ratings, or Fitch Ratings, whichever is the highest for each constituent. All ratings are as of the report date and do not reflect subsequent changes.

## Exercise Rate.

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

†† For each credit derivative with sold protection, the credit ratings of the entities referenced, as rated by any rating organization, are included in the equivalent S&P Global Ratings or Western Asset Management Company's rating category, as applicable. The reference entity rating represents the likelihood of a potential payment by the Fund if the referenced entity experiences a credit event as of period end. Notional amounts represent the maximum potential amount of future payments (undiscounted) the Fund could be required to make under the credit derivatives with sold protection.

Currency Legend

AUD Australian Dollar

BRL Brazilian Real

CAD Canadian Dollar

CHF Swiss Franc

CLP Chilean Peso

CNH Offshore Chinese Yuan

CNY Chinese Yuan Renminbi

COP Colombian Peso

CZK Czech Koruna

EGP Egyptian Pound

EUR Euro

GBP British Pound

HUF Hungarian Forint

IDR Indonesian Rupiah

INR Indian Rupee

JPY Japanese Yen

KRW South Korean Won

LKR Sri Lanka Rupee

MXN Mexican Peso

MYR Malaysian Ringgit

NOK Norwegian Krone

NZD New Zealand Dollar

PEN Peruvian New Sol

PLN Polish Zloty

SEK Swedish Krona

SGD Singapore Dollar

THB Thai Baht

TRY New Turkish Lira

TWD Taiwan Dollar

USD U.S. Dollar

ZAR South African Rand

MassMutual Select T. Rowe Price Large Cap Blend Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.3%
COMMON STOCK — 99.0%
Communication Services — 8.3%
Alphabet, Inc. Class A		369,874	$	67,372,550
Alphabet, Inc. Class C		207,017		37,971,058
AT&T, Inc.		79,657		1,522,245
Charter Communications, Inc. Class A (a)		1,084		324,073
Comcast Corp. Class A		165,137		6,466,765
Electronic Arts, Inc.		31,723		4,419,965
Epic Games, Inc. (Acquired 6/18/20-3/29/21, Cost $2,322,065) (a) (b) (c) (d)		3,487		2,103,358
Fox Corp. Class A		2,593		89,121
Fox Corp. Class B		1,383		44,284
Interpublic Group of Cos., Inc.		4,196		122,062
Live Nation Entertainment, Inc. (a)		1,558		146,047
Match Group, Inc. (a)		2,948		89,560
Meta Platforms, Inc. Class A		99,963		50,403,344
Netflix, Inc. (a)		34,093		23,008,684
News Corp. Class A		4,138		114,085
News Corp. Class B		1,170		33,216
Omnicom Group, Inc.		2,186		196,084
Paramount Global Class B		5,179		53,810
Pinterest, Inc. Class A (a)		81,411		3,587,783
Spotify Technology SA (a)		15,795		4,956,313
T-Mobile US, Inc.		86,433		15,227,766
Take-Two Interactive Software, Inc. (a)		1,789		278,172
Verizon Communications, Inc.		46,773		1,928,918
Walt Disney Co.		20,259		2,011,516
Warner Bros Discovery, Inc. (a)		24,488		182,191
				222,652,970
Consumer Discretionary — 8.9%
Airbnb, Inc. Class A (a)		4,900		742,987
Amazon.com, Inc. (a)		561,730		108,554,322
Aptiv PLC (a)		3,091		217,668
AutoZone, Inc. (a)		2,335		6,921,173
Bath & Body Works, Inc.		2,471		96,493
Best Buy Co., Inc.		2,170		182,909
Booking Holdings, Inc.		3,486		13,809,789
BorgWarner, Inc.		2,496		80,471
Caesars Entertainment, Inc. (a)		2,338		92,912
CarMax, Inc. (a)		1,728		126,732
Carnival Corp. (a)		11,384		213,108
Chipotle Mexican Grill, Inc. (a)		116,063		7,271,347
Cie Financiere Richemont SA Registered Class A		34,049		5,313,986
Coupang, Inc. (a)		220,345		4,616,228
Darden Restaurants, Inc.		1,318		199,440
Deckers Outdoor Corp. (a)		285		275,866

MassMutual Select T. Rowe Price Large Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Domino's Pizza, Inc.		385	$	198,787
DR Horton, Inc.		3,286		463,096
eBay, Inc.		5,701		306,258
Etsy, Inc. (a)		1,295		76,379
Expedia Group, Inc. (a)		1,439		181,300
Ferrari NV		7,581		3,095,853
Floor & Decor Holdings, Inc. Class A (a) (e)		15,554		1,546,223
Ford Motor Co.		43,494		545,415
Garmin Ltd.		1,731		282,015
General Motors Co.		12,855		597,243
Genuine Parts Co.		1,552		214,673
Hasbro, Inc.		1,413		82,660
Hilton Worldwide Holdings, Inc.		34,314		7,487,315
Home Depot, Inc.		21,891		7,535,758
Las Vegas Sands Corp.		4,073		180,230
Lennar Corp. Class A		2,714		406,747
LKQ Corp.		2,930		121,859
Lowe's Cos., Inc.		6,357		1,401,464
Lululemon Athletica, Inc. (a)		1,270		379,349
Marriott International, Inc. Class A		2,663		643,834
McDonald's Corp.		53,480		13,628,843
MGM Resorts International (a)		2,760		122,654
Mohawk Industries, Inc. (a)		567		64,406
NIKE, Inc. Class B		13,454		1,014,028
Norwegian Cruise Line Holdings Ltd. (a)		115,801		2,175,901
NVR, Inc. (a)		35		265,600
O'Reilly Automotive, Inc. (a)		4,491		4,742,765
Pool Corp.		425		130,615
PulteGroup, Inc.		2,327		256,203
Ralph Lauren Corp.		419		73,350
Rivian Automotive, Inc. Class A (a) (e)		306,967		4,119,497
Ross Stores, Inc.		3,720		540,590
Royal Caribbean Cruises Ltd. (a)		2,680		427,272
Service Corp. International		15,559		1,106,712
Starbucks Corp.		41,448		3,226,727
Tapestry, Inc.		2,496		106,804
Tesla, Inc. (a)		82,800		16,384,464
TJX Cos., Inc.		70,695		7,783,519
Tractor Supply Co.		24,566		6,632,820
Ulta Beauty, Inc. (a)		536		206,826
Wynn Resorts Ltd.		1,037		92,811
Yum! Brands, Inc.		3,189		422,415
				237,986,711
Consumer Staples — 5.5%
Altria Group, Inc.		19,068		868,547
Archer-Daniels-Midland Co.		5,570		336,707
Brown-Forman Corp. Class B		1,965		84,868
Bunge Global SA		1,600		170,832
Campbell Soup Co.		2,139		96,661
Church & Dwight Co., Inc.		2,706		280,558
Clorox Co.		1,370		186,964
Coca-Cola Co.		340,014		21,641,891
Colgate-Palmolive Co.		182,037		17,664,871
Conagra Brands, Inc.		5,259		149,461
Constellation Brands, Inc. Class A		1,785		459,245
Costco Wholesale Corp.		4,929		4,189,601
Dollar General Corp.		44,389		5,869,558

MassMutual Select T. Rowe Price Large Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Dollar Tree, Inc. (a)		50,508	$	5,392,739
Estee Lauder Cos., Inc. Class A		2,649		281,854
General Mills, Inc.		6,256		395,755
Hershey Co.		1,634		300,378
Hormel Foods Corp.		3,164		96,470
J. M. Smucker Co.		1,162		126,705
Kellanova		2,906		167,618
Kenvue, Inc.		1,103,407		20,059,939
Keurig Dr Pepper, Inc.		253,485		8,466,399
Kimberly-Clark Corp.		3,735		516,177
Kraft Heinz Co.		8,736		281,474
Kroger Co.		7,516		375,274
Lamb Weston Holdings, Inc.		1,581		132,931
McCormick & Co., Inc.		2,777		197,000
Molson Coors Beverage Co. Class B		2,024		102,880
Mondelez International, Inc. Class A		69,476		4,546,509
Monster Beverage Corp. (a)		7,861		392,657
PepsiCo, Inc.		15,279		2,519,965
Philip Morris International, Inc.		17,273		1,750,273
Procter & Gamble Co.		140,773		23,216,283
Sysco Corp.		5,519		394,001
Target Corp.		29,425		4,356,077
Tyson Foods, Inc. Class A		3,157		180,391
Walgreens Boots Alliance, Inc.		7,846		94,897
Walmart, Inc.		307,183		20,799,361
				147,143,771
Energy — 4.9%
APA Corp.		3,951		116,317
Baker Hughes Co.		11,059		388,945
Chesapeake Energy Corp. (e)		60,357		4,960,742
Chevron Corp.		57,902		9,057,031
ConocoPhillips		179,613		20,544,135
Coterra Energy, Inc.		8,322		221,948
Devon Energy Corp.		6,999		331,753
Diamondback Energy, Inc.		54,026		10,815,465
EOG Resources, Inc.		6,379		802,925
EQT Corp.		402,357		14,879,162
Exxon Mobil Corp.		129,043		14,855,430
Halliburton Co.		388,745		13,131,806
Hess Corp.		10,197		1,504,261
Kinder Morgan, Inc.		120,489		2,394,116
Marathon Oil Corp.		6,446		184,807
Marathon Petroleum Corp.		3,911		678,480
Occidental Petroleum Corp.		7,468		470,708
ONEOK, Inc.		6,474		527,955
Phillips 66		4,705		664,205
Range Resources Corp.		288,555		9,675,249
Schlumberger NV		387,319		18,273,710
Targa Resources Corp.		2,471		318,215
TechnipFMC PLC		72,564		1,897,549
Valero Energy Corp.		3,684		577,504
Williams Cos., Inc.		76,903		3,268,378
				130,540,796
Financials — 13.5%
Aflac, Inc.		5,825		520,231

MassMutual Select T. Rowe Price Large Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Allstate Corp.		80,147	$	12,796,270
American Express Co.		70,706		16,371,974
American International Group, Inc.		7,477		555,092
Ameriprise Financial, Inc.		1,119		478,026
Ant Group Balance Owed 2023 (Acquired 8/14/23, Cost $423,859) (a) (b) (c) (d)		423,859		427,504
Aon PLC Class A		2,413		708,409
Arch Capital Group Ltd. (a)		4,214		425,150
Arthur J Gallagher & Co.		2,457		637,125
Assurant, Inc.		566		94,098
Bank of America Corp.		518,391		20,616,410
Bank of New York Mellon Corp.		8,425		504,573
Berkshire Hathaway, Inc. Class B (a)		88,471		35,990,003
BlackRock, Inc.		1,551		1,221,133
Blackstone, Inc.		7,935		982,353
Brown & Brown, Inc.		2,612		233,539
Capital One Financial Corp.		4,238		586,751
Cboe Global Markets, Inc.		1,167		198,460
Charles Schwab Corp.		285,433		21,033,558
Chubb Ltd.		29,350		7,486,598
Cincinnati Financial Corp.		1,734		204,785
Citigroup, Inc.		136,346		8,652,517
Citizens Financial Group, Inc.		5,141		185,230
CME Group, Inc.		25,631		5,039,055
Corebridge Financial, Inc.		104,543		3,044,292
Corpay, Inc. (a)		11,604		3,091,422
Discover Financial Services		2,844		372,024
East West Bancorp, Inc.		21,282		1,558,481
Everest Group Ltd.		479		182,509
FactSet Research Systems, Inc.		420		171,473
Fidelity National Information Services, Inc.		6,267		472,281
Fifth Third Bancorp		7,709		281,301
Fiserv, Inc. (a)		144,898		21,595,598
Franklin Resources, Inc.		3,241		72,436
Global Payments, Inc.		2,875		278,013
Globe Life, Inc.		926		76,191
Goldman Sachs Group, Inc.		32,829		14,849,213
Hartford Financial Services Group, Inc.		3,275		329,269
Huntington Bancshares, Inc.		459,844		6,060,744
Intercontinental Exchange, Inc.		6,368		871,716
Invesco Ltd.		4,842		72,436
Jack Henry & Associates, Inc.		799		132,650
JP Morgan Chase & Co.		211,099		42,696,884
KeyCorp.		153,051		2,174,855
KKR & Co., Inc.		7,388		777,513
Loews Corp.		2,002		149,629
LPL Financial Holdings, Inc.		17,126		4,783,292
M&T Bank Corp.		1,880		284,557
MarketAxess Holdings, Inc.		410		82,217
Marsh & McLennan Cos., Inc.		29,303		6,174,728
Mastercard, Inc. Class A		44,272		19,531,036
MetLife, Inc.		204,716		14,369,016
Moody's Corp.		1,743		733,681
Morgan Stanley		13,901		1,351,038
MSCI, Inc.		879		423,458
Nasdaq, Inc.		4,207		253,514
Northern Trust Corp.		2,263		190,047
PayPal Holdings, Inc. (a)		11,609		673,670

MassMutual Select T. Rowe Price Large Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
PNC Financial Services Group, Inc.		15,893	$	2,471,044
Principal Financial Group, Inc.		2,421		189,927
Progressive Corp.		56,100		11,652,531
Prudential Financial, Inc.		3,981		466,533
Raymond James Financial, Inc.		2,083		257,480
Regions Financial Corp.		10,200		204,408
S&P Global, Inc.		3,557		1,586,422
State Street Corp.		3,343		247,382
Synchrony Financial		4,492		211,977
T. Rowe Price Group, Inc.		2,481		286,084
Travelers Cos., Inc.		38,417		7,811,713
Truist Financial Corp.		14,844		576,689
US Bancorp		17,318		687,525
Visa, Inc. Class A		161,892		42,491,793
W. R. Berkley Corp.		2,232		175,391
Wells Fargo & Co.		129,770		7,707,040
Willis Towers Watson PLC		1,132		296,742
				361,430,709
Health Care — 12.8%
Abbott Laboratories		19,331		2,008,684
AbbVie, Inc.		57,018		9,779,727
Agilent Technologies, Inc.		3,248		421,038
Align Technology, Inc. (a)		788		190,247
Amgen, Inc.		19,660		6,142,767
Argenx SE ADR (a)		9,161		3,939,596
AstraZeneca PLC Sponsored ADR		163,156		12,724,536
Baxter International, Inc.		5,606		187,521
Becton Dickinson & Co.		3,207		749,508
Bio-Rad Laboratories, Inc. Class A (a)		224		61,177
Bio-Techne Corp.		1,724		123,525
Biogen, Inc. (a)		1,647		381,808
Boston Scientific Corp. (a)		16,330		1,257,573
Bristol-Myers Squibb Co.		62,983		2,615,684
Cardinal Health, Inc.		2,695		264,972
Catalent, Inc. (a)		1,972		110,886
Cencora, Inc.		84,631		19,067,364
Centene Corp. (a)		5,913		392,032
Charles River Laboratories International, Inc. (a)		562		116,098
Cigna Group		35,744		11,815,894
The Cooper Cos., Inc.		2,195		191,624
CVS Health Corp.		13,936		823,060
Danaher Corp.		57,775		14,435,084
DaVita, Inc. (a)		583		80,786
Dexcom, Inc. (a)		4,410		500,006
Edwards Lifesciences Corp. (a)		6,686		617,586
Elevance Health, Inc.		56,629		30,684,990
Eli Lilly & Co.		49,619		44,924,050
GE HealthCare Technologies, Inc. (a)		44,703		3,483,258
Gilead Sciences, Inc.		13,833		949,082
HCA Healthcare, Inc.		15,446		4,962,491
Henry Schein, Inc. (a)		1,416		90,766
Hologic, Inc. (a)		36,710		2,725,717
Humana, Inc.		1,357		507,043
IDEXX Laboratories, Inc. (a)		3,315		1,615,068
Incyte Corp. (a)		1,719		104,206
Insulet Corp. (a)		766		154,579
Intuitive Surgical, Inc. (a)		30,015		13,352,173

MassMutual Select T. Rowe Price Large Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
IQVIA Holdings, Inc. (a)		2,020	$	427,109
Johnson & Johnson		153,494		22,434,683
Labcorp Holdings, Inc.		936		190,485
Legend Biotech Corp. ADR (a)		32,150		1,423,924
McKesson Corp.		1,444		843,354
Medtronic PLC		14,748		1,160,815
Merck & Co., Inc.		144,917		17,940,725
Mettler-Toledo International, Inc. (a)		3,347		4,677,734
Moderna, Inc. (a)		3,763		446,856
Molina Healthcare, Inc. (a)		15,588		4,634,312
Pfizer, Inc.		62,962		1,761,677
Quest Diagnostics, Inc.		1,221		167,130
Regeneron Pharmaceuticals, Inc. (a)		1,179		1,239,164
ResMed, Inc.		1,671		319,863
Revvity, Inc.		55,014		5,768,768
Solventum Corp. (a)		1,502		79,426
STERIS PLC		1,093		239,957
Stryker Corp.		13,855		4,714,164
Teleflex, Inc.		512		107,689
Tenet Healthcare Corp. (a)		54,804		7,290,576
Thermo Fisher Scientific, Inc.		45,371		25,090,163
UnitedHealth Group, Inc.		86,814		44,210,898
Universal Health Services, Inc. Class B		666		123,163
Vertex Pharmaceuticals, Inc. (a)		3,727		1,746,919
Viatris, Inc.		13,174		140,040
Waters Corp. (a)		653		189,448
West Pharmaceutical Services, Inc.		820		270,100
Zimmer Biomet Holdings, Inc.		2,316		251,355
Zoetis, Inc.		5,067		878,415
				341,321,118
Industrials — 9.6%
3M Co.		6,140		627,447
A.O. Smith Corp.		1,342		109,749
Airbus SE		20,306		2,799,906
Allegion PLC		960		113,424
American Airlines Group, Inc. (a) (e)		7,126		80,738
AMETEK, Inc.		90,982		15,167,609
Automatic Data Processing, Inc.		4,545		1,084,846
Axon Enterprise, Inc. (a)		799		235,098
Boeing Co. (a)		22,583		4,110,332
Booz Allen Hamilton Holding Corp.		32,066		4,934,957
Broadridge Financial Solutions, Inc.		22,445		4,421,665
Builders FirstSource, Inc. (a)		1,365		188,930
C.H. Robinson Worldwide, Inc.		1,271		112,000
Carrier Global Corp.		9,296		586,392
Caterpillar, Inc.		5,433		1,809,732
Cintas Corp.		957		670,149
Copart, Inc. (a)		9,704		525,569
CSX Corp.		546,484		18,279,890
Cummins, Inc.		45,997		12,737,949
Dayforce, Inc. (a) (e)		1,700		84,320
Deere & Co.		23,460		8,765,360
Delta Air Lines, Inc.		7,277		345,221
Dover Corp.		52,833		9,533,715
Eaton Corp. PLC		4,441		1,392,476
Emerson Electric Co.		6,349		699,406
Equifax, Inc.		1,403		340,171

MassMutual Select T. Rowe Price Large Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Expeditors International of Washington, Inc.		1,604	$	200,163
Fastenal Co.		6,345		398,720
FedEx Corp.		21,052		6,312,232
Ferguson PLC		17,418		3,372,996
Fortive Corp.		3,993		295,881
GE Vernova, Inc. (a)		13,917		2,386,905
Generac Holdings, Inc. (a)		667		88,191
General Dynamics Corp.		50,021		14,513,093
General Electric Co.		63,691		10,124,958
Honeywell International, Inc.		59,007		12,600,355
Howmet Aerospace, Inc.		4,294		333,343
Hubbell, Inc.		594		217,095
Huntington Ingalls Industries, Inc.		432		106,415
IDEX Corp.		20,702		4,165,242
Illinois Tool Works, Inc.		3,013		713,960
Ingersoll Rand, Inc.		48,871		4,439,442
Jacobs Solutions, Inc.		1,386		193,638
JB Hunt Transport Services, Inc.		897		143,520
Johnson Controls International PLC		7,590		504,507
L3Harris Technologies, Inc.		33,906		7,614,609
Leidos Holdings, Inc.		1,520		221,738
Lockheed Martin Corp.		2,372		1,107,961
Masco Corp.		2,420		161,341
Nordson Corp.		597		138,468
Norfolk Southern Corp.		25,750		5,528,267
Northrop Grumman Corp.		1,544		673,107
Old Dominion Freight Line, Inc.		68,898		12,167,387
Otis Worldwide Corp.		4,482		431,437
PACCAR, Inc.		5,816		598,699
Parker-Hannifin Corp.		9,527		4,818,852
Paychex, Inc.		3,551		421,007
Paycom Software, Inc.		521		74,524
Pentair PLC		1,816		139,233
Quanta Services, Inc.		1,649		418,994
Republic Services, Inc.		47,408		9,213,271
Rockwell Automation, Inc.		44,535		12,259,595
Rollins, Inc.		3,081		150,322
RTX Corp.		14,771		1,482,861
Siemens AG Registered		29,731		5,529,643
Snap-on, Inc.		580		151,606
Southwest Airlines Co.		6,574		188,082
Stanley Black & Decker, Inc.		1,683		134,455
Textron, Inc.		2,162		185,629
Trane Technologies PLC		2,513		826,601
TransDigm Group, Inc.		622		794,673
Uber Technologies, Inc. (a)		138,876		10,093,508
Union Pacific Corp.		43,413		9,822,625
United Airlines Holdings, Inc. (a)		3,617		176,003
United Parcel Service, Inc. Class B		8,101		1,108,622
United Rentals, Inc.		739		477,933
Veralto Corp.		2,425		231,515
Verisk Analytics, Inc.		1,607		433,167
W.W. Grainger, Inc.		485		437,586
Waste Management, Inc.		4,053		864,667
Westinghouse Air Brake Technologies Corp.		95,509		15,095,197
Xylem, Inc.		2,738		371,355
				255,412,247

MassMutual Select T. Rowe Price Large Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Information Technology — 30.4%
Accenture PLC Class A		19,642	$	5,959,579
Adobe, Inc. (a)		21,866		12,147,438
Advanced Micro Devices, Inc. (a)		49,480		8,026,151
Akamai Technologies, Inc. (a)		1,661		149,623
Amphenol Corp. Class A		193,622		13,044,314
Analog Devices, Inc.		63,049		14,391,565
ANSYS, Inc. (a)		989		317,963
Apple, Inc.		735,417		154,893,528
Applied Materials, Inc.		59,744		14,098,987
Arista Networks, Inc. (a)		2,818		987,653
ASML Holding NV		11,249		11,504,690
Atlassian Corp. Class A (a)		26,804		4,741,091
Autodesk, Inc. (a)		22,124		5,474,584
Broadcom, Inc.		7,642		12,269,460
Cadence Design Systems, Inc. (a)		3,021		929,713
Canva, Inc. (Acquired 12/17/21-12/22/21, Cost $872,531) (a) (b) (c) (d)		512		546,130
CDW Corp.		1,524		341,132
Celonis SE (Acquired 6/17/21, Cost $435,243) (a) (b) (c) (d)		1,177		211,107
Cisco Systems, Inc.		44,996		2,137,760
Cognizant Technology Solutions Corp. Class A		5,508		374,544
Corning, Inc.		8,742		339,627
Crowdstrike Holdings, Inc. Class A (a)		2,561		981,350
Dynatrace, Inc. (a)		57,594		2,576,756
Enphase Energy, Inc. (a)		1,495		149,066
EPAM Systems, Inc. (a)		631		118,697
F5, Inc. (a)		642		110,572
Fair Isaac Corp. (a)		273		406,404
First Solar, Inc. (a)		1,213		273,483
Fortinet, Inc. (a)		127,734		7,698,528
Gartner, Inc. (a)		860		386,192
Gen Digital, Inc.		6,134		153,227
GoDaddy, Inc. Class A (a)		1,587		221,720
Hewlett Packard Enterprise Co.		14,651		310,162
HP, Inc.		9,558		334,721
Intel Corp.		317,183		9,823,157
International Business Machines Corp.		10,206		1,765,128
Intuit, Inc.		19,398		12,748,560
Jabil, Inc.		1,404		152,741
Juniper Networks, Inc.		3,520		128,339
Keysight Technologies, Inc. (a)		84,809		11,597,631
KLA Corp.		11,409		9,406,835
Lam Research Corp.		10,029		10,679,381
Microchip Technology, Inc.		5,994		548,451
Micron Technology, Inc.		105,054		13,817,753
Microsoft Corp.		417,020		186,387,089
MongoDB, Inc. (a)		3,067		766,627
Monolithic Power Systems, Inc.		545		447,816
Motorola Solutions, Inc.		1,852		714,965
NetApp, Inc.		2,325		299,460
NVIDIA Corp.		1,365,236		168,661,255
NXP Semiconductors NV		31,324		8,428,975
ON Semiconductor Corp. (a)		4,857		332,947
Oracle Corp.		17,717		2,501,640
Palo Alto Networks, Inc. (a)		3,589		1,216,707
PTC, Inc. (a)		1,322		240,168
Qorvo, Inc. (a)		1,051		121,958
QUALCOMM, Inc.		44,117		8,787,224

MassMutual Select T. Rowe Price Large Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Roper Technologies, Inc.		10,562	$	5,953,377
Salesforce, Inc.		25,839		6,643,207
Seagate Technology Holdings PLC		2,201		227,297
ServiceNow, Inc. (a)		18,031		14,184,447
Shopify, Inc. Class A (a)		106,509		7,034,919
Skyworks Solutions, Inc.		1,762		187,794
Snowflake, Inc. Class A (a)		11,316		1,528,678
Stripe, Inc., Class B (Acquired 12/17/19, Cost $295,694) (a) (b) (c) (d)		18,846		489,996
Super Micro Computer, Inc. (a)		559		458,017
Synopsys, Inc. (a)		12,194		7,256,162
Taiwan Semiconductor Manufacturing Co. Ltd.		154,000		4,580,192
TE Connectivity Ltd.		98,770		14,857,971
Teledyne Technologies, Inc. (a)		15,854		6,151,035
Teradyne, Inc.		1,772		262,770
Texas Instruments, Inc.		75,514		14,689,738
Trimble, Inc. (a)		2,734		152,885
Tyler Technologies, Inc. (a)		482		242,340
VeriSign, Inc. (a)		969		172,288
Western Digital Corp. (a)		3,706		280,804
Zebra Technologies Corp. Class A (a)		565		174,545
				811,710,786
Materials — 2.6%
Air Products & Chemicals, Inc.		2,466		636,351
Albemarle Corp. (e)		1,293		123,507
Amcor PLC		15,904		155,541
Avery Dennison Corp.		890		194,599
Ball Corp.		3,490		209,470
Celanese Corp.		1,104		148,919
CF Industries Holdings, Inc.		2,101		155,726
Corteva, Inc.		7,725		416,686
Dow, Inc.		7,794		413,472
DuPont de Nemours, Inc.		4,710		379,108
Eastman Chemical Co.		1,285		125,891
Ecolab, Inc.		2,820		671,160
FMC Corp.		1,354		77,923
Franco-Nevada Corp.		26,163		3,100,839
Freeport-McMoRan, Inc.		132,496		6,439,306
International Flavors & Fragrances, Inc.		2,829		269,349
International Paper Co.		298,165		12,865,820
Linde PLC (LIN US)		40,902		17,948,207
LyondellBasell Industries NV Class A		2,899		277,318
Martin Marietta Materials, Inc.		13,647		7,393,945
Mosaic Co.		118,160		3,414,824
Newmont Corp. (NEM US)		12,791		535,559
Nucor Corp.		2,701		426,974
Nutrien Ltd.		23,973		1,220,465
Packaging Corp. of America		979		178,726
PPG Industries, Inc.		2,607		328,195
Sherwin-Williams Co.		2,590		772,934
Southern Copper Corp.		59,513		6,411,931
Steel Dynamics, Inc.		1,681		217,689
Vulcan Materials Co.		1,466		364,565
Westrock Co.		2,821		141,783
Wheaton Precious Metals Corp.		64,368		3,374,171
				69,390,953

MassMutual Select T. Rowe Price Large Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Real Estate — 1.3%
Alexandria Real Estate Equities, Inc.		1,740	$	203,528
American Tower Corp.		5,185		1,007,860
AvalonBay Communities, Inc.		1,615		334,127
Boston Properties, Inc.		1,570		96,649
Camden Property Trust		1,169		127,550
CBRE Group, Inc. Class A (a)		3,385		301,637
CoStar Group, Inc. (a)		4,639		343,935
Crown Castle, Inc.		4,817		470,621
Digital Realty Trust, Inc.		3,599		547,228
Equinix, Inc.		1,063		804,266
Equity LifeStyle Properties, Inc.		56,767		3,697,235
Equity Residential		3,822		265,017
Essex Property Trust, Inc.		708		192,718
Extra Space Storage, Inc.		2,402		373,295
Federal Realty Investment Trust		795		80,271
Healthpeak Properties, Inc.		7,778		152,449
Host Hotels & Resorts, Inc.		7,742		139,201
Invitation Homes, Inc.		6,359		228,224
Iron Mountain, Inc.		3,326		298,076
Kimco Realty Corp.		7,306		142,175
Mid-America Apartment Communities, Inc.		1,285		183,254
Prologis, Inc.		28,610		3,213,189
Public Storage		43,604		12,542,691
Realty Income Corp.		9,658		510,135
Regency Centers Corp.		1,790		111,338
SBA Communications Corp.		1,193		234,186
Simon Property Group, Inc.		3,616		548,909
UDR, Inc.		3,314		136,371
Ventas, Inc.		4,561		233,797
VICI Properties, Inc.		11,761		336,835
Welltower, Inc.		6,636		691,803
Weyerhaeuser Co.		177,756		5,046,493
				33,595,063
Utilities — 1.2%
AES Corp.		8,122		142,704
Alliant Energy Corp.		2,802		142,622
Ameren Corp.		78,679		5,594,864
American Electric Power Co., Inc.		5,846		512,928
American Water Works Co., Inc.		2,159		278,856
Atmos Energy Corp.		25,341		2,956,028
CenterPoint Energy, Inc.		7,275		225,379
CMS Energy Corp.		3,399		202,342
Consolidated Edison, Inc.		3,924		350,884
Constellation Energy Corp.		17,423		3,489,304
Dominion Energy, Inc.		9,293		455,357
DTE Energy Co.		2,287		253,880
Duke Energy Corp.		8,568		858,771
Edison International		4,364		313,379
Entergy Corp.		2,425		259,475
Evergy, Inc.		2,521		133,537
Eversource Energy		4,004		227,067
Exelon Corp.		11,302		391,162
FirstEnergy Corp.		5,711		218,560
NextEra Energy, Inc.		60,665		4,295,689
NiSource, Inc.		5,124		147,622

MassMutual Select T. Rowe Price Large Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
NRG Energy, Inc.		2,348	$	182,815
PG&E Corp.		23,686		413,558
Pinnacle West Capital Corp.		1,232		94,100
PPL Corp.		8,154		225,458
Public Service Enterprise Group, Inc.		5,521		406,898
Sempra		7,134		542,612
Southern Co.		12,142		941,855
Vistra Corp.		3,679		316,320
WEC Energy Group, Inc.		3,591		281,750
Xcel Energy, Inc.		113,493		6,061,661
				30,917,437
TOTAL COMMON STOCK (Cost $2,152,842,507)				2,642,102,561
PREFERRED STOCK — 0.3%
Consumer Discretionary — 0.1%
GM Cruise Holdings LLC, Class F (Acquired 5/07/19, Cost $921,625) (a) (b) (c) (d)		50,500		294,920
GM Cruise Holdings LLC, Class G (Acquired 1/21/21, Cost $979,851) (a) (b) (c) (d)		37,186		217,166
Nuro, Inc., Series C (Acquired 10/30/20-3/02/21, Cost $1,236,023) (a) (b) (c) (d)		94,681		387,245
Nuro, Inc., Series D (Acquired 10/29/21, Cost $487,977) (a) (b) (c) (d)		23,409		95,743
Rappi, Inc., Series E (Acquired 9/08/20-9/24/20, Cost $1,092,516) (a) (b) (c) (d)		18,286		415,458
Waymo LLC., Series A-2 (Acquired 5/08/20, Cost $748,934) (a) (b) (c) (d)		8,722		538,147
				1,948,679
Health Care — 0.1%
Sartorius AG 0.340%		11,134		2,609,476
Industrials — 0.0%
Sila Nanotechnologies, Inc., Series F (Acquired 1/07/21, Cost $760,988) (a) (b) (c) (d)		18,438		360,533
Information Technology — 0.0%
Canva, Inc., Series A (Acquired 12/17/21, Cost $49,421) (a) (b) (c) (d)		29		30,933
Canva, Inc., Series A-3 (Acquired 12/17/21, Cost $13,633) (a) (b) (c) (d)		8		8,533
Celonis SE, Series D (Acquired 6/17/21-10/04/22, Cost $1,306,468) (a) (b) (c) (d)		3,533		633,679
Formagrid, Inc., Series F (Acquired 12/08/21, Cost $1,130,824) (a) (b) (c) (d)		6,038		290,186
				963,331
Materials — 0.1%
Redwood Materials, Inc., Series C (Acquired 5/28/21, Cost $1,059,705) (a) (b) (c) (d)		22,355		1,151,730

MassMutual Select T. Rowe Price Large Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Redwood Materials, Inc., Series D (Acquired 6/17/22, Cost $50,373) (a) (b) (c) (d)		1,241	$	63,936
				1,215,666
TOTAL PREFERRED STOCK (Cost $14,078,396)				7,097,685
TOTAL EQUITIES (Cost $2,166,920,903)				2,649,200,246
TOTAL LONG-TERM INVESTMENTS (Cost $2,166,920,903)				2,649,200,246
SHORT-TERM INVESTMENTS — 0.0%
Mutual Fund — 0.0%
T. Rowe Price Government Reserve Investment Fund		59,412		59,412
	Principal Amount
U.S. Treasury Bill — 0.0%
U.S. Treasury Bills
5.310% 11/29/24 (f)	$	50,000		48,925
TOTAL SHORT-TERM INVESTMENTS (Cost $108,325)				108,337
TOTAL INVESTMENTS — 99.3% (Cost $2,167,029,228) (g)				2,649,308,583
Other Assets/(Liabilities) — 0.7%				19,777,365
NET ASSETS — 100.0%			$	2,669,085,948

Abbreviation Legend

ADR American Depositary Receipt

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Non-income producing security.

(b) Restricted security. Certain securities are restricted to resale. At June 30, 2024, these securities amounted to a value of $8,266,304 or 0.31% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

(c) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At June 30, 2024, these securities amounted to a value of $8,266,304 or 0.31% of net assets.

(d) Investment is valued using significant unobservable inputs.

(e) Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2024, was $5,587,632 or 0.21% of net assets. The Fund received $6,195,602 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) The rate shown represents yield-to-maturity.

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

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/Net Unrealized Appreciation (Depreciation)
Long
S&P 500 E Mini Index	9/20/24		5	$	1,377,262	$	3,113

MassMutual Select T. Rowe Price Real Assets Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 97.3%
COMMON STOCK — 96.6%
Australia — 8.2%
Bellevue Gold Ltd. (a) (b)		384,968	$	453,220
BHP Group Ltd.		339,903		9,737,001
BlueScope Steel Ltd.		16,368		222,921
Capricorn Metals Ltd. (b)		229,955		726,734
Champion Iron Ltd. (CIA AU) (a)		109,935		468,783
Champion Iron Ltd. (CIA CN) (a)		24,884		106,590
Emerald Resources NL (b)		502,553		1,170,081
Fortescue Ltd.		26,342		376,323
Glencore PLC		601,657		3,430,517
Goodman Group		95,933		2,210,913
Northern Star Resources Ltd.		190,613		1,637,977
Predictive Discovery Ltd. (b)		1,785,299		207,326
Red 5 Ltd. (b)		1,494,623		355,594
Rio Tinto Ltd. (a)		5,217		414,016
Rio Tinto PLC		46,835		3,082,946
Scentre Group		596,044		1,241,026
South32 Ltd.		179,282		437,520
				26,279,488
Austria — 0.2%
OMV AG		15,686		682,202
Bahrain — 0.1%
Aluminium Bahrain BSC		141,330		446,021
Belgium — 0.5%
Shurgard Self Storage Ltd.		22,195		856,909
Warehouses De Pauw CVA		30,123		813,445
				1,670,354
Bosnia and Herzegowina — 0.2%
Adriatic Metals PLC (b)		194,401		503,692
Brazil — 2.2%
ERO Copper Corp. (ERO CN) (a) (b)		86,522		1,849,277
Vale SA Sponsored ADR		162,766		1,818,096
Wheaton Precious Metals Corp. (a)		68,332		3,582,804
				7,250,177
Canada — 10.5%
Agnico Eagle Mines Ltd. (AEM CN)		34,533		2,258,699
Agnico Eagle Mines Ltd. (AEM US)		9,284		607,174
Alamos Gold, Inc. Class A (AGI CN)		95,112		1,491,980
Alamos Gold, Inc. Class A (AGI US)		50,925		798,504
Aya Gold & Silver, Inc. (b)		50,881		505,072

MassMutual Select T. Rowe Price Real Assets Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Barrick Gold Corp.		76,032	$	1,268,214
Boardwalk Real Estate Investment Trust		11,525		593,752
Cameco Corp.		32,454		1,596,737
Canadian Apartment Properties REIT		14,150		459,755
Canadian National Railway Co.		2,614		308,892
Canadian Natural Resources Ltd.		66,222		2,358,830
Canadian Pacific Kansas City Ltd. (a)		3,794		298,702
Colliers International Group, Inc.		4,136		461,784
Enbridge, Inc.		60,134		2,140,169
Filo Corp. (b)		22,618		414,648
Foran Mining Corp. (b)		131,126		375,727
Franco-Nevada Corp.		35,977		4,265,538
G Mining Ventures Corp. (b)		326,045		562,455
Ivanhoe Mines Ltd. Class A (a) (b)		133,461		1,721,857
Karora Resources, Inc. (b)		25,874		112,722
Kinross Gold Corp.		73,954		615,297
Lundin Gold, Inc.		48,030		709,540
New Gold, Inc. (b)		110,508		218,100
NGEx Minerals Ltd. (a) (b)		64,520		382,012
Osisko Gold Royalties Ltd. (a)		73,795		1,150,038
Osisko Mining, Inc. (b)		376,900		787,935
Skeena Resources Ltd. (b)		74,737		400,986
Snowline Gold Corp. (b)		60,718		235,229
StorageVault Canada, Inc. (a)		114,032		388,428
Suncor Energy, Inc. (SU CN)		46,158		1,759,541
Teck Resources Ltd. Class B		54,693		2,619,795
Wesdome Gold Mines Ltd. (b)		134,651		1,084,649
West Fraser Timber Co. Ltd. (WFG (CN) (a)		10,279		789,455
				33,742,216
Chile — 0.1%
Antofagasta PLC		18,539		491,596
China — 0.5%
Aluminum Corp. of China Ltd. Class H		376,000		256,521
China Hongqiao Group Ltd.		166,000		251,185
CMOC Group Ltd.		261,000		237,820
Zijin Mining Group Co. Ltd. Class H		436,000		912,613
				1,658,139
Egypt — 0.2%
Centamin PLC		326,901		498,187
France — 1.5%
Air Liquide SA		7,355		1,266,252
Gecina SA		7,332		676,986
TotalEnergies SE (a)		45,713		3,046,729
				4,989,967
Germany — 0.5%
BASF SE		7,621		368,252
LEG Immobilien SE		15,116		1,234,308
				1,602,560
Ghana — 0.2%
Kosmos Energy Ltd. (b)		107,200		593,888

MassMutual Select T. Rowe Price Real Assets Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Hong Kong — 0.6%
Kerry Properties Ltd.		137,000	$	237,826
Sun Hung Kai Properties Ltd.		133,000		1,149,882
Wharf Real Estate Investment Co. Ltd.		168,000		443,995
				1,831,703
India — 0.6%
Hindalco Industries Ltd.		38,449		318,262
JSW Steel Ltd.		30,880		344,904
Nexus Select Trust		228,490		382,186
Tata Steel Ltd.		429,354		896,403
				1,941,755
Japan — 2.8%
ARE Holdings, Inc.		4,800		62,700
Comforia Residential REIT, Inc.		317		627,321
Invincible Investment Corp.		2,488		1,007,624
Japan Metropolitan Fund Invest		464		261,008
JFE Holdings, Inc.		25,700		370,619
Kyoritsu Maintenance Co. Ltd.		12,000		223,709
Mitsubishi Estate Co. Ltd.		101,100		1,592,620
Mitsui Fudosan Co. Ltd.		190,500		1,752,256
Mitsui Fudosan Logistics Park, Inc.		188		506,968
Nippon Steel Corp. (a)		73,600		1,550,695
Shin-Etsu Chemical Co. Ltd.		31,300		1,217,450
				9,172,970
Kazakhstan — 0.3%
NAC Kazatomprom JSC GDR (c)		22,372		896,076
Luxembourg — 0.2%
ArcelorMittal SA		32,840		748,696
Mexico — 0.7%
Grupo Mexico SAB de CV Series B		220,826		1,191,458
Industrias Penoles SAB de CV (a) (b)		32,601		423,234
Southern Copper Corp.		6,717		723,690
				2,338,382
Norway — 0.6%
Equinor ASA		36,526		1,043,646
Norsk Hydro ASA		71,942		447,823
Seadrill Ltd. (b)		10,476		539,514
				2,030,983
Portugal — 0.4%
Galp Energia SGPS SA		58,686		1,239,868
Republic of Korea — 0.3%
LG Chem Ltd.		1,300		325,006
Lotte Chemical Corp.		3,049		253,220
POSCO Holdings, Inc.		1,133		297,403
				875,629

MassMutual Select T. Rowe Price Real Assets Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Russia — 0.0%
Alrosa PJSC (b) (d) (e)		688,100	$	—
MMC Norlisk Nickel PJSC (b) (d) (e)		265,400		—
Polyus PJSC (b) (d) (e)		2,282		—
				—
Singapore — 0.5%
CapitaLand Integrated Commercial Trust		542,700		789,513
Digital Core REIT Management Pte. Ltd.		414,300		236,194
Mapletree Industrial Trust		321,400		499,917
				1,525,624
South Africa — 2.7%
Anglo American Platinum Ltd. (a)		16,021		526,435
Anglo American PLC		138,631		4,360,561
Gold Fields Ltd.		61,163		913,067
Harmony Gold Mining Co. Ltd.		50,253		464,410
Impala Platinum Holdings Ltd. (a)		210,596		1,042,519
Northam Platinum Holdings Ltd.		137,800		958,157
Sibanye Stillwater Ltd.		423,179		456,123
				8,721,272
Spain — 0.1%
Cellnex Telecom SA (c)		6,803		220,787
Sweden — 0.2%
Boliden AB		16,765		534,034
Taiwan — 0.1%
China Steel Corp.		377,000		268,669
United Kingdom — 2.2%
Anglogold Ashanti PLC (ANG SJ)		36,049		907,382
Anglogold Ashanti PLC (AU US)		17,079		429,195
Big Yellow Group PLC		38,730		574,429
Derwent London PLC		13,503		385,100
InterContinental Hotels Group PLC		2,766		289,994
Persimmon PLC		42,293		718,869
Segro PLC		134,747		1,531,249
TechnipFMC PLC		50,224		1,313,358
UNITE Group PLC		47,779		539,113
Yellow Cake PLC (b) (c)		35,611		262,257
				6,950,946
United States — 58.5%
Acadia Realty Trust		104,386		1,870,597
Alcoa Corp.		4,416		175,668
Alexandria Real Estate Equities, Inc.		7,072		827,212
Ameren Corp.		4,100		291,551
American Homes 4 Rent Class A		93,568		3,476,987
American Tower Corp.		25,760		5,007,229
Apple Hospitality REIT, Inc.		78,888		1,147,032
Atlas Energy Solutions, Inc. (a)		21,804		434,554
AvalonBay Communities, Inc.		22,768		4,710,472
Baker Hughes Co.		32,126		1,129,871
Ball Corp.		12,107		726,662

MassMutual Select T. Rowe Price Real Assets Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
BP PLC Sponsored ADR		60,102	$	2,169,682
Camden Property Trust		12,714		1,387,225
CBRE Group, Inc. Class A (b)		4,138		368,737
CenterPoint Energy, Inc.		9,990		309,490
CF Industries Holdings, Inc.		12,652		937,766
Chesapeake Energy Corp. (a)		10,262		843,434
Chevron Corp.		16,123		2,521,960
Cleveland-Cliffs, Inc. (b)		17,557		270,202
Commercial Metals Co.		7,385		406,101
ConocoPhillips		37,401		4,277,926
Crown Castle, Inc.		13,375		1,306,738
CSX Corp.		8,736		292,219
CubeSmart		54,735		2,472,380
Devon Energy Corp.		7,650		362,610
Diamondback Energy, Inc.		9,095		1,820,728
Dominion Energy, Inc.		7,185		352,065
Douglas Emmett, Inc.		44,511		592,441
EastGroup Properties, Inc.		10,925		1,858,343
EOG Resources, Inc.		18,293		2,302,540
EQT Corp.		33,485		1,238,275
Equinix, Inc.		11,641		8,807,581
Equity LifeStyle Properties, Inc.		49,006		3,191,761
Equity Residential		58,377		4,047,861
Essex Property Trust, Inc.		17,000		4,627,400
Expro Group Holdings NV (b)		23,148		530,552
Extra Space Storage, Inc.		7,012		1,089,735
Exxon Mobil Corp.		54,678		6,294,531
Federal Realty Investment Trust		2,414		243,742
FirstEnergy Corp.		10,505		402,026
Freeport-McMoRan, Inc.		118,976		5,782,234
Gaming & Leisure Properties, Inc.		40,543		1,832,949
GE Vernova, Inc. (b)		4,276		733,377
Halliburton Co.		34,757		1,174,091
HB Fuller Co.		6,847		526,945
Healthcare Realty Trust, Inc.		33,510		552,245
Hess Corp.		11,639		1,716,985
Hilton Worldwide Holdings, Inc.		7,035		1,535,037
Host Hotels & Resorts, Inc.		35,167		632,303
Hubbell, Inc.		1,423		520,078
Huntsman Corp.		21,420		487,733
International Flavors & Fragrances, Inc.		7,854		747,779
International Paper Co.		10,623		458,382
Ivanhoe Electric, Inc. (a) (b)		67,594		634,032
Kilroy Realty Corp.		37,792		1,177,977
Kimco Realty Corp.		39,265		764,097
Kinder Morgan, Inc.		21,183		420,906
Linde PLC (LIN US)		7,795		3,420,524
Louisiana-Pacific Corp.		8,428		693,877
Marathon Petroleum Corp.		12,955		2,247,433
Marriott International, Inc. Class A		2,662		643,592
Mosaic Co.		17,846		515,749
MP Materials Corp. (a) (b)		32,059		408,111
Newmont Corp. (NEM AU)		29,690		1,237,597
Newmont Corp. (NEM US)		45,534		1,906,509
NextEra Energy, Inc.		13,372		946,871
Noble Corp. PLC		14,930		666,625
Norfolk Southern Corp.		1,133		243,244
Nucor Corp.		27,379		4,328,072

MassMutual Select T. Rowe Price Real Assets Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Packaging Corp. of America		4,579	$	835,942
Pebblebrook Hotel Trust		30,748		422,785
Permian Resources Corp.		38,725		625,409
PG&E Corp.		23,946		418,097
Phillips 66		5,183		731,684
Prologis, Inc.		81,507		9,154,051
Public Storage		20,358		5,855,979
Quanta Services, Inc.		2,063		524,188
Range Resources Corp.		30,130		1,010,259
Rayonier, Inc.		26,322		765,707
Regency Centers Corp.		66,426		4,131,697
Reliance, Inc.		9,766		2,789,170
Rexford Industrial Realty, Inc.		76,509		3,411,536
Royal Gold, Inc.		6,713		840,199
RPM International, Inc.		5,946		640,265
SBA Communications Corp.		9,239		1,813,616
Schlumberger NV		44,586		2,103,567
Schneider Electric SE		2,224		530,655
Shell PLC		94,002		3,378,190
Sherwin-Williams Co.		4,136		1,234,306
Simon Property Group, Inc.		35,405		5,374,479
SL Green Realty Corp.		6,004		340,067
Southern Co.		7,611		590,385
Southwestern Energy Co. (b)		137,749		927,051
Stanley Black & Decker, Inc.		5,788		462,403
Steel Dynamics, Inc.		28,244		3,657,598
Sun Communities, Inc.		19,172		2,307,159
Targa Resources Corp.		11,887		1,530,808
Tenaris SA ADR		16,560		505,411
Terreno Realty Corp.		46,039		2,724,588
Union Pacific Corp.		1,333		301,605
Valero Energy Corp.		11,140		1,746,306
Ventas, Inc.		62,531		3,205,339
Vulcan Materials Co.		3,254		809,205
Warrior Met Coal, Inc.		8,298		520,865
Weatherford International PLC (b)		3,331		407,881
Welltower, Inc.		56,275		5,866,669
Weyerhaeuser Co.		49,703		1,411,068
Williams Cos., Inc.		56,108		2,384,590
				188,370,019
Vietnam — 0.7%
Hoa Phat Group JSC (b)		2,085,930		2,318,289
Zambia — 0.2%
First Quantum Minerals Ltd.		49,536		650,679
TOTAL COMMON STOCK (Cost $302,283,150)				311,044,868
PREFERRED STOCK — 0.7%
United States — 0.7%
Jetti Holdings, Inc., Series C (Acquired 5/24/21-6/30/21, Cost $130,426)
(b) (d) (e) (f)		2,253		299,406
KoBold Metals, Inc., Series B-1 (Acquired 1/10/22, Cost $670,800)
(b) (d) (e) (f)		24,472		1,795,266

MassMutual Select T. Rowe Price Real Assets Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Lilac Solutions, Inc., Series B (Acquired 9/08/21, Cost $329,342)
(b) (d) (e) (f)		25,087	$	338,389
				2,433,061
TOTAL PREFERRED STOCK (Cost $1,130,568)				2,433,061
TOTAL EQUITIES (Cost $303,413,718)				313,477,929
EXCHANGE-TRADED FUNDS — 2.4%
United States — 2.4%
Global X Copper Miners ETF		44,645		2,013,936
Global X U.S. Infrastructure Development ETF (a)		43,963		1,627,510
iShares U.S. Home Construction ETF (a)		9,144		924,093
SPDR S&P Homebuilders ETF (a)		16,802		1,698,346
SPDR S&P Oil & Gas Exploration & Production ETF		5,471		795,866
VanEck Oil Services ETF (a)		2,245		710,352
				7,770,103
TOTAL EXCHANGE-TRADED FUNDS (Cost $7,216,107)				7,770,103
MUTUAL FUNDS — 0.1%
Canada — 0.1%
Sprott Physical Uranium Trust (b)		12,900		239,132
TOTAL MUTUAL FUNDS (Cost $295,756)				239,132
TOTAL LONG-TERM INVESTMENTS (Cost $310,925,581)				321,487,164
SHORT-TERM INVESTMENTS — 4.3%
Investment of Cash Collateral from Securities Loaned — 3.3%
State Street Navigator Securities Lending Government Money Market Portfolio (g)		10,491,458		10,491,458
Mutual Fund — 0.0%
T. Rowe Price Government Reserve Investment Fund		10,817		10,817
	Principal Amount
U.S. Treasury Bill — 1.0%
U.S. Treasury Bills
5.243% 11/29/24 (h) (i)	$	2,467,000		2,413,966
5.346% 7/09/24 (h)		150,000		149,826
5.365% 7/09/24 (h)		310,000		309,639
5.366% 9/19/24 (h) (i)		120,000		118,608
5.387% 8/06/24 (h) (i)		100,000		99,478
				3,091,517
TOTAL SHORT-TERM INVESTMENTS (Cost $13,593,982)				13,593,792

MassMutual Select T. Rowe Price Real Assets Fund —  Portfolio of Investments (Continued)

	Value
TOTAL INVESTMENTS — 104.1% (Cost $324,519,563) (j)	$	335,080,956
Other Assets/(Liabilities) — (4.1)%		(13,148,980)
NET ASSETS — 100.0%	$	321,931,976

Abbreviation Legend

ADR American Depositary Receipt

ETF Exchange-Traded Fund

GDR	Global Depositary Receipt
ICE	Inter-Continental Exchange
REIT	Real Estate Investment Trust

SOFR Secured Overnight Financing Rate

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 June 30, 2024, was $21,453,418 or 6.66% of net assets. The Fund received $11,995,099 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

(b) Non-income producing security.

(c) Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At June 30, 2024, the aggregate market value of these securities amounted to $1,379,120 or 0.43% of net assets.

(d) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At June 30, 2024, these securities amounted to a value of $2,433,061 or 0.76% of net assets.

(e) Investment is valued using significant unobservable inputs.

(f) Restricted security. Certain securities are restricted to resale. At June 30, 2024, these securities amounted to a value of $2,433,061 or 0.76% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

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

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

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

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

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
Bank of America N.A.	7/15/24	NOK	21,524,000	USD	2,038,846	$	(22,245)
Barclays Bank PLC	7/12/24	TRY	42,547,611	USD	1,276,794		12,287
BNP Paribas SA	7/15/24	IDR	8,391,619,000	USD	515,133		(2,767)
BNP Paribas SA	7/15/24	INR	132,153,921	USD	1,581,562		2,637
BNP Paribas SA	7/15/24	USD	2,082,252	SEK	21,533,400		49,329
Citibank N.A.	7/15/24	PLN	5,416,000	USD	1,341,815		3,392
Citibank N.A.	7/18/24	ILS	10,649,750	USD	2,882,755		(61,494)
Citibank N.A.	7/18/24	USD	2,873,651	ILS	10,649,750		52,389
UBS AG	7/15/24	USD	1,117,521	CNH	8,059,000		12,375
UBS AG	7/15/24	USD	4,379,684	CHF	3,891,700		41,361
Wells Fargo Bank N.A.	7/12/24	JPY	652,560,700	USD	4,168,726		(106,622)
Wells Fargo Bank N.A.	7/15/24	CLP	2,550,306,000	USD	2,823,728		(114,002)
Wells Fargo Bank N.A.	7/15/24	USD	2,792,897	CLP	2,550,306,000		83,171
						$	(50,189)

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/Net Unrealized Appreciation (Depreciation)
Long
OMX Stockholm 30 Index	7/19/24		138	$	3,358,842	$	(2,261)
KOSPI 200 Index	9/12/24		45		3,027,221		130,380
Topix Index	9/12/24		7		1,191,225		31,567
S&P 500 E Mini Index	9/20/24		11		3,033,419		3,406
Xae Energy	9/20/24		12		1,116,178		42,542
Xak Technology	9/20/24		12		2,800,825		(30,985)
Xav Health Care	9/20/24		5		744,501		249
						$	174,898
Short
Canada 10 Year Bond	9/18/24		112	$	(9,750,353)	$	(79,580)
E-Mini MSCI EAFE Index	9/20/24		10		(1,168,693)		(2,907)
E-Mini S&P 500 Real Estate Index	9/20/24		21		(991,484)		(7,329)
Euro Stoxx 50 Index	9/20/24		90		(4,804,694)		56,742
MSCI World Index	9/20/24		8		(890,012)		(10,308)
Mini MSCI Emerging Market Index	9/20/24		65		(3,536,323)		(327)
						$	(43,709)

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)
6-Month AUD-BBR-BBSW	Semi-Annually		Fixed 4.366%		Semi-Annually		2/09/34	AUD	2,008,000	$	(18,406)	$	—	$	(18,406)
6-Month AUD-BBR-BBSW	Semi-Annually		Fixed 4.343%		Semi-Annually		2/09/34	AUD	2,008,000		(20,847)		—		(20,847)
6-Month AUD-BBR-BBSW	Semi-Annually		Fixed 4.370%		Semi-Annually		2/09/34	AUD	5,021,000		(45,119)		—		(45,119)
6-Month AUD-BBR-BBSW	Semi-Annually		Fixed 4.375%		Semi-Annually		2/09/34	AUD	2,008,000		(17,519)		—		(17,519)
6-Month AUD-BBR-BBSW	Semi-Annually		Fixed 4.341%		Semi-Annually		2/09/34	AUD	2,035,000		(21,314)		—		(21,314)
6-Month AUD-BBR-BBSW	Semi-Annually		Fixed 4.381%		Semi-Annually		2/12/34	AUD	2,259,000		(18,991)		—		(18,991)
										$	(142,196)	$	—	$	(142,196)

OTC Total Return Swaps
Paid by the Fund				Received by the Fund
Rate/ Reference	No. of Contracts/ Notional		Frequency	Rate/ Reference	No. of Contracts/ Notional	Frequency	Counterparty	Termination Date	Value		Upfront Premium Paid/ Received		Unrealized Appreciation (Depreciation)
iShares MSCI ACWI ETF+30BP		3,022	Monthly	1 Day-SOFR+30BP	USD 339,582	Monthly	Bank of America N.A.	1/16/26	$	(91)	$	—	$	(91)
1 Day-SOFR+30BP	USD	98,999	Monthly	VanEck Vietnam ETF+30BP	7,826	Monthly	Bank of America N.A.	1/16/26		(3,756)		—		(3,756)
1 Day-SOFR	USD	388,126	Monthly	iShares Semiconductor ETF	1,516	Monthly	Bank of America N.A.	1/21/26		(14,235)		—		(14,235)
1 Day-SOFR	USD	207,267	Monthly	ICE Semiconductor Gross Total Return Index	129	Monthly	Goldman Sachs International	1/16/26		(7,615)		—		(7,615)
DKK-CIBOR-DKNA13+35BP	DKK	23,450	Monthly	A.P. Moller Maersk A/S+35BP	2	Monthly	Morgan Stanley & Co. LLC	1/16/26		109		—		109
DKK-CIBOR-DKNA13+35BP	DKK	22,830	Monthly	A.P. Moller Maersk A/S+35BP	2	Monthly	Morgan Stanley & Co. LLC	1/16/26		116		—		116
DKK-CIBOR-DKNA13+35BP	DKK	70,186	Monthly	Danske Bank A/S+35BP	339	Monthly	Morgan Stanley & Co. LLC	1/16/26		22		—		22
DKK-CIBOR-DKNA13+35BP	DKK	49,044	Monthly	Coloplast A/S+35BP	59	Monthly	Morgan Stanley & Co. LLC	1/16/26		45		—		45
DKK-CIBOR-DKNA13+35BP	DKK	38,534	Monthly	Novozymes A/S+35BP	91	Monthly	Morgan Stanley & Co. LLC	1/16/26		35		—		35
DKK-CIBOR-DKNA13+35BP	DKK	34,223	Monthly	Tryg A/S+35BP	228	Monthly	Morgan Stanley & Co. LLC	1/16/26		69		—		69
DKK-CIBOR-DKNA13+35BP	DKK	26,965	Monthly	Genmab A/S+35BP	15	Monthly	Morgan Stanley & Co. LLC	1/16/26		(113)		—		(113)
DKK-CIBOR-DKNA13+35BP	DKK	29,451	Monthly	Pandora A/S+35BP	28	Monthly	Morgan Stanley & Co. LLC	1/16/26		(3)		—		(3)
DKK-CIBOR-DKNA13+35BP	DKK	60,480	Monthly	DSV A/S+35BP	56	Monthly	Morgan Stanley & Co. LLC	1/16/26		(105)		—		(105)
DKK-CIBOR-DKNA13+35BP	DKK	14,688	Monthly	Vestas Wind Systems A/S+35BP	84	Monthly	Morgan Stanley & Co. LLC	1/16/26		(164)		—		(164)
DKK-CIBOR-DKNA13+35BP	DKK	26,746	Monthly	Orsted A/S+35BP	70	Monthly	Morgan Stanley & Co. LLC	1/16/26		(115)		—		(115)
DKK-CIBOR-DKNA13	DKK	350,700	Monthly	A.P. Moller Maersk A/S	30	Monthly	Morgan Stanley & Co. LLC	1/16/26		1,788		—		1,788
DKK-CIBOR-DKNA13+35BP	DKK	1,024,884	Monthly	Danske Bank A/S+35BP	4,980	Monthly	Morgan Stanley & Co. LLC	1/18/26		1,216		—		1,216
DKK-CIBOR-DKNA13+35BP	DKK	1,956,098	Monthly	Novo Nordisk A/S+35BP	1,995	Monthly	Morgan Stanley & Co. LLC	1/18/26		7,191		—		7,191
DKK-CIBOR-DKNA13+35BP	DKK	1,342,224	Monthly	DSV A/S+35BP	1,248	Monthly	Morgan Stanley & Co. LLC	1/18/26		(1,523)		—		(1,523)
DKK-CIBOR-DKNA13+35BP	DKK	847,565	Monthly	Genmab A/S+35BP	471	Monthly	Morgan Stanley & Co. LLC	1/18/26		(3,686)		—		(3,686)
DKK-CIBOR-DKNA13+35BP	DKK	927,428	Monthly	Coloplast A/S+35BP	1,087	Monthly	Morgan Stanley & Co. LLC	1/18/26		(2,591)		—		(2,591)
DKK-CIBOR-DKNA13+35BP	DKK	1,300,510	Monthly	Vestas Wind Systems A/S+35BP	7,423	Monthly	Morgan Stanley & Co. LLC	1/18/26		(14,870)		—		(14,870)
DKK-CIBOR-DKNA13+35BP	DKK	1,036,272	Monthly	Novozymes A/S+35BP	2,581	Monthly	Morgan Stanley & Co. LLC	1/18/26		9,117		—		9,117
DKK-CIBOR-DKNA13+35BP	DKK	630,750	Monthly	Pandora A/S+35BP	601	Monthly	Morgan Stanley & Co. LLC	1/18/26		129		—		129
DKK-CIBOR-DKNA13+35BP	DKK	361,529	Monthly	Tryg A/S+35BP	2,428	Monthly	Morgan Stanley & Co. LLC	1/18/26		1,151		—		1,151
DKK-CIBOR-DKNA13+35BP	DKK	592,049	Monthly	Orsted A/S+35BP	1,543	Monthly	Morgan Stanley & Co. LLC	1/18/26		(2,903)		—		(2,903)
DKK-CIBOR-DKNA13	DKK	284,750	Monthly	A.P. Moller Maersk A/S	25	Monthly	Morgan Stanley & Co. LLC	1/20/26		1,544		—		1,544
DKK-CIBOR-DKNA13	DKK	15,372	Monthly	Svitzer A/S	60	Monthly	Morgan Stanley & Co. LLC	1/20/26		29		—		29
iShares MSCI ACWI ETF		60,671	Monthly	1 Day-SOFR	USD 3,210,103	Monthly	Morgan Stanley & Co. LLC	1/16/26		(13,348)		—		(13,348)
1 Day-SOFR	USD	101,571	Monthly	db x-trackers FTSE VIETNAM UCITS ETF	3,709	Monthly	Morgan Stanley & Co. LLC	1/16/26		(6,009)		—		(6,009)
1 Day-SOFR+40BP	USD	3,263,306	Monthly	Vanguard FTSE All-World Small Cap Index+40BP	27,592	Monthly	Morgan Stanley & Co. LLC	1/16/26		(21,522)		—		(21,522)
									$	(70,088)	$	—	$	(70,088)

Currency Legend

AUD Australian Dollar

CHF Swiss Franc

CLP Chilean Peso

CNH Offshore Chinese Yuan

DKK Danish Krone

IDR Indonesian Rupiah

ILS Israeli Shekel

INR Indian Rupee

JPY Japanese Yen

NOK Norwegian Krone

PLN Polish Zloty

SEK Swedish Krona

TRY New Turkish Lira

USD U.S. Dollar

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 96.7%
COMMON STOCK — 95.4%
Communication Services — 2.7%
Advantage Solutions, Inc. (a)		61,301	$	197,388
Atlanta Braves Holdings, Inc. (a)		1,622		63,972
ESC GCI Liberty, Inc. (a) (b) (c)		29,586		—
Frontier Communications Parent, Inc. (a)		24,212		633,870
Ibotta, Inc. Class A (a)		1,036		77,866
Liberty Media Corp-Liberty Formula One Class C (a)		25,458		1,828,903
Liberty Media Corp-Liberty Live Class C (a)		24,600		941,442
Match Group, Inc. (a)		35,216		1,069,862
New York Times Co. Class A		40,609		2,079,587
News Corp. Class A		105,276		2,902,459
News Corp. Class B		14,833		421,109
Reddit, Inc. Class A (a)		5,909		377,526
Spotify Technology SA (a)		6,400		2,008,256
Trade Desk, Inc. Class A (a)		46,100		4,502,587
Vimeo, Inc. (a)		54,785		204,348
				17,309,175
Consumer Discretionary — 10.0%
Abercrombie & Fitch Co. Class A (a)		1,465		260,536
Advance Auto Parts, Inc.		43,567		2,759,098
Aramark		32,970		1,121,639
Asbury Automotive Group, Inc. (a)		1,710		389,658
Bath & Body Works, Inc.		73,129		2,855,688
Birkenstock Holding PLC (a)		10,165		553,078
BJ's Restaurants, Inc. (a)		13,216		458,595
Boot Barn Holdings, Inc. (a)		1,225		157,939
Bright Horizons Family Solutions, Inc. (a)		29,176		3,211,694
Burlington Stores, Inc. (a)		15,428		3,702,720
Caesars Entertainment, Inc. (a)		25,434		1,010,747
Caleres, Inc.		17,697		594,619
Carvana Co. (a)		4,540		584,389
Cava Group, Inc. (a)		11,275		1,045,756
Chewy, Inc. Class A (a)		3,357		91,445
Compass Group PLC		42,938		1,169,031
Domino's Pizza, Inc.		7,352		3,796,058
Dorman Products, Inc. (a)		5,909		540,555
DraftKings, Inc. Class A (a)		30,400		1,160,368
Duolingo, Inc. (a)		2,205		460,117
Dutch Bros, Inc. Class A (a)		20,311		840,875
Etsy, Inc. (a)		3,020		178,120
Figs, Inc. Class A (a)		62,424		332,720
Five Below, Inc. (a)		20,425		2,225,712
Floor & Decor Holdings, Inc. Class A (a) (d)		15,039		1,495,027

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Framebridge Future Contingency Payments (Acquired 5/19/20-11/10/20, Cost $10,553) (a) (b) (c) (e)		10,553	$	4,960
General Motors Co.		27,415		1,273,701
Group 1 Automotive, Inc.		1,398		415,597
Hilton Worldwide Holdings, Inc.		12,700		2,771,140
Installed Building Products, Inc.		1,592		327,443
LCI Industries		3,222		333,090
Leslie's, Inc. (a)		26,772		112,175
Lululemon Athletica, Inc. (a)		3,150		940,905
Marriott Vacations Worldwide Corp.		4,608		402,371
Meritage Home Corp.		8,311		1,345,135
Modine Manufacturing Co. (a)		4,872		488,126
Moncler SpA		11,854		725,950
Monro, Inc.		16,247		387,653
Norwegian Cruise Line Holdings Ltd. (a)		101,789		1,912,615
Ollie's Bargain Outlet Holdings, Inc. (a)		5,020		492,813
On Holding AG, Class A (a)		10,054		390,095
Oxford Industries, Inc.		1,681		168,352
Papa John's International, Inc.		17,253		810,546
Pax Labs, Inc., Class A (Acquired 4/18/19, Cost $218,578) (a) (b) (c) (e)		58,048		23,219
Peloton Interactive, Inc. Class A (a) (d)		49,613		167,692
Pool Corp.		501		153,972
Puma SE		29,176		1,340,903
Rad Power Bikes, Inc., Class A (Acquired 1/22/21, Cost $69,082) (a) (b) (c) (e)		39,882		12,363
Ralph Lauren Corp.		6,204		1,086,072
Red Rock Resorts, Inc. Class A		6,066		333,205
RH (a)		1,705		416,770
Rivian Automotive, Inc. Class A (a) (d)		21,560		289,335
Ross Stores, Inc.		18,300		2,659,356
Savers Value Village, Inc. (a) (d)		19,290		236,110
Shake Shack, Inc. Class A (a)		4,064		365,760
Skechers USA, Inc. Class A (a)		5,715		395,021
Skyline Champion Corp. (a)		11,434		774,654
Smith Douglas Homes Corp. (a)		4,865		113,744
Steven Madden Ltd.		14,183		599,941
Strategic Education, Inc.		15,019		1,662,003
Strattec Security Corp. (a)		1,142		28,550
Taylor Morrison Home Corp. (a)		3,828		212,224
Tractor Supply Co.		1,964		530,280
Ulta Beauty, Inc. (a)		7,953		3,068,824
United Parks & Resorts, Inc. (a)		863		46,870
Urban Outfitters, Inc. (a)		6,135		251,842
VF Corp.		126,907		1,713,245
Victoria's Secret & Co. (a)		9,193		162,440
Viking Holdings Ltd. (a)		20,676		701,744
Visteon Corp. (a)		2,163		230,792
Warby Parker, Inc. Class A (a)		15,503		248,978
Wingstop, Inc.		1,013		428,155
Wyndham Hotels & Resorts, Inc.		8,770		648,980
Yum! Brands, Inc.		18,676		2,473,823
				65,675,718
Consumer Staples — 3.2%
BellRing Brands, Inc. (a)		19,519		1,115,316
Boston Beer Co., Inc. Class A (a)		3,503		1,068,590
BRC, Inc. (a) (d)		9,600		58,848
Casey's General Stores, Inc.		5,400		2,060,424

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Celsius Holdings, Inc. (a)		235	$	13,416
Coca-Cola Consolidated, Inc.		53		57,505
Constellation Brands, Inc. Class A		5,143		1,323,191
Dollar General Corp.		12,660		1,674,032
Dollar Tree, Inc. (a)		22,377		2,389,192
elf Beauty, Inc. (a)		1,272		268,036
Farmer's Business Network, Inc. (Acquired 7/31/20, Cost $48,230) (a) (b) (c) (e)		1,459		5,500
Flowers Foods, Inc.		56,909		1,263,380
Freshpet, Inc. (a)		1,259		162,902
Inter Parfums, Inc.		3,379		392,065
Kenvue, Inc.		128,704		2,339,839
McCormick & Co., Inc.		8,900		631,366
Nomad Foods Ltd.		20,091		331,100
Post Holdings, Inc. (a)		9,763		1,016,914
Reynolds Consumer Products, Inc.		25,000		699,500
Simply Good Foods Co. (a)		15,739		568,650
TreeHouse Foods, Inc. (a)		26,172		958,942
Tyson Foods, Inc. Class A		34,702		1,982,872
Utz Brands, Inc.		28,922		481,262
				20,862,842
Energy — 6.3%
Advantage Energy Ltd. (a)		31,549		239,376
Antero Resources Corp. (a)		16,116		525,865
Baker Hughes Co.		45,307		1,593,447
Cactus, Inc. Class A		18,405		970,680
Cameco Corp.		11,180		550,056
ChampionX Corp.		27,790		922,906
Cheniere Energy, Inc.		14,900		2,604,967
Chesapeake Energy Corp. (d)		35,414		2,910,677
Coterra Energy, Inc.		36,300		968,121
DT Midstream, Inc. (a)		6,392		454,024
Enerflex Ltd.		77,454		417,829
EQT Corp.		44,500		1,645,610
Expro Group Holdings NV (a)		92,539		2,120,994
Gulfport Energy Corp. (a)		731		110,381
International Seaways, Inc.		160		9,461
Kimbell Royalty Partners LP		11,991		196,173
Kinder Morgan, Inc.		37,710		749,298
Liberty Energy, Inc.		29,678		619,973
Magnolia Oil & Gas Corp. Class A		49,402		1,251,847
Matador Resources Co.		29,219		1,741,452
Noble Corp. PLC		12,920		576,878
Permian Resources Corp.		39,318		634,986
Range Resources Corp.		71,291		2,390,387
Sitio Royalties Corp. Class A		2,743		64,762
SM Energy Co.		10,312		445,788
Southwestern Energy Co. (a)		211,394		1,422,681
Suncor Energy, Inc. (SU US)		39,810		1,516,761
TechnipFMC PLC		306,799		8,022,794
Tidewater, Inc. (a)		18,797		1,789,662
Viper Energy, Inc.		10,094		378,828
Weatherford International PLC (a)		29,719		3,639,091
				41,485,755

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Financials — 12.9%
Allstate Corp.		8,877	$	1,417,302
Apollo Global Management, Inc.		10,830		1,278,698
Assurant, Inc.		22,535		3,746,444
Axis Capital Holdings Ltd.		14,076		994,469
Baldwin Insurance Group, Inc., Class A (a)		2,944		104,424
Banc of California, Inc.		53,806		687,641
BankUnited, Inc.		14,986		438,640
Blue Foundry Bancorp (a)		16,291		147,759
Bowhead Specialty Holdings, Inc. (a)		6,535		165,597
Cadence Bank		25,737		727,842
Capitol Federal Financial, Inc.		35,800		196,542
Cathay General Bancorp		7,371		278,034
Cboe Global Markets, Inc.		12,716		2,162,483
Coastal Financial Corp. (a)		6,014		277,486
Columbia Banking System, Inc.		69,785		1,388,024
Columbia Financial, Inc. (a)		9,472		141,796
Corebridge Financial, Inc.		51,215		1,491,381
Corpay, Inc. (a)		15,842		4,220,467
CRB Group, Inc. (Acquired 4/14/22, Cost $73,283) (a) (b) (c) (e)		697		50,888
CrossFirst Bankshares, Inc. (a)		38,113		534,344
Dime Community Bancshares, Inc.		9,319		190,108
Dogwood State Bank, (Non-Voting) (Acquired 5/06/19-4/05/24, Cost $61,690) (a) (b) (c) (e)		6,169		109,561
Dogwood State Bank, (Voting) (Acquired 5/06/19, Cost $26,370) (a) (b) (c) (e)		2,637		46,833
East West Bancorp, Inc.		21,161		1,549,620
Eastern Bankshares, Inc.		53,488		747,762
Encore Capital Group, Inc. (a)		5,653		235,900
Equity Bancshares, Inc. Class A		7,043		247,914
FB Financial Corp.		27,330		1,066,690
Fifth Third Bancorp		83,025		3,029,582
First American Financial Corp.		11,697		631,053
First Bancshares, Inc.		9,866		256,319
Five Star Bancorp		9,947		235,246
FS Bancorp, Inc.		6,864		250,193
Global Payments, Inc.		11,629		1,124,524
Goosehead Insurance, Inc. Class A (a)		6,599		379,047
Grasshopper Bancorp, Inc. (Acquired 5/02/19, Cost $83,390) (a) (b) (c) (e)		8,339		25,017
Hamilton Lane, Inc. Class A		1,822		225,163
Hannon Armstrong Sustainable Infrastructure Capital, Inc. (d)		29,861		883,886
Hanover Insurance Group, Inc.		12,754		1,599,862
HarborOne Bancorp, Inc.		33,715		375,248
Helix Acquisition Corp. II (a)		3,237		33,082
Home BancShares, Inc.		41,835		1,002,367
Houlihan Lokey, Inc.		7,465		1,006,730
Intercontinental Exchange, Inc.		17,000		2,327,130
Jackson Financial, Inc. Class A		8,303		616,581
James River Group Holdings Ltd.		19,608		151,570
John Marshall Bancorp, Inc.		11,118		193,898
Kearny Financial Corp.		26,824		164,968
KKR & Co., Inc.		8,900		936,636
Live Oak Bancshares, Inc.		37,682		1,321,131
Markel Group, Inc. (a)		500		787,830
MarketAxess Holdings, Inc.		6,375		1,278,379
Metropolitan Bank Holding Corp. (a)		2,440		102,700
Morningstar, Inc.		4,288		1,268,605
National Bank Holdings Corp. Class A		15,459		603,674

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
NerdWallet, Inc. Class A (a)		16,044	$	234,242
OneMain Holdings, Inc.		29,265		1,419,060
Onex Corp.		4,423		300,740
Open Lending Corp. Class A (a)		74,230		414,203
Origin Bancorp, Inc.		16,372		519,320
Oscar Health, Inc. Class A (a)		66,911		1,058,532
OTC Markets Group, Inc. Class A		4,155		203,179
Pacific Premier Bancorp, Inc.		23,199		532,881
Palomar Holdings, Inc. (a)		629		51,043
PennyMac Financial Services, Inc.		26,805		2,535,753
PennyMac Mortgage Investment Trust		37,060		509,575
Pinnacle Financial Partners, Inc.		22,869		1,830,435
Ponce Financial Group, Inc. (a)		16,904		154,503
Popular, Inc.		40,757		3,604,141
PRA Group, Inc. (a)		15,081		296,492
Preferred Bank		6,609		498,913
Primerica, Inc.		970		229,483
ProAssurance Corp. (a)		26,927		329,048
Prosperity Bancshares, Inc.		13,548		828,325
Provident Bancorp, Inc. (a)		5,825		59,357
Raymond James Financial, Inc.		11,950		1,477,139
RenaissanceRe Holdings Ltd.		6,425		1,436,052
RLI Corp.		2,986		420,100
Root, Inc. Class A (a)		357		18,425
Ryan Specialty Holdings, Inc.		11,773		681,774
Selective Insurance Group, Inc.		11,894		1,116,014
Southern First Bancshares, Inc. (a)		4,617		135,001
SouthState Corp.		20,629		1,576,468
Stash Financial, Inc. (Acquired 1/06/21-1/26/21, Cost $15,690) (a) (b) (c) (e)		487		696
StepStone Group, Inc. Class A		29,715		1,363,621
Stifel Financial Corp.		4,145		348,802
StoneX Group, Inc. (a)		1,910		143,842
Synovus Financial Corp.		3,605		144,885
Texas Capital Bancshares, Inc. (a)		16,800		1,027,152
TMX Group Ltd.		15,107		420,507
Toast, Inc., Class A (a)		103,800		2,674,926
Towne Bank		24,431		666,233
Tradeweb Markets, Inc. Class A		8,900		943,400
Voya Financial, Inc.		3,740		266,101
Walker & Dunlop, Inc.		7,343		721,083
Webster Financial Corp.		45,992		2,004,791
Western Alliance Bancorp		47,175		2,963,533
Western Union Co.		153,075		1,870,576
White Mountains Insurance Group Ltd.		330		599,758
WSFS Financial Corp.		14,209		667,823
				84,752,997
Health Care — 15.7%
10X Genomics, Inc. Class A (a)		11,214		218,112
Acadia Healthcare Co., Inc. (a)		24,900		1,681,746
ACELYRIN, Inc. (a) (d)		22,303		98,356
Agilent Technologies, Inc.		28,700		3,720,381
Agios Pharmaceuticals, Inc. (a)		1,703		73,433
Akero Therapeutics, Inc. (a)		17,055		400,110
Alcon, Inc.		19,700		1,754,876
Align Technology, Inc. (a)		3,500		845,005
Alignment Healthcare, Inc. (a)		44,805		350,375
Alkermes PLC (a)		57,283		1,380,520

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Alnylam Pharmaceuticals, Inc. (a)		14,056	$	3,415,608
Apellis Pharmaceuticals, Inc. (a)		16,258		623,657
Arcellx, Inc. (a)		7,518		414,918
Argenx SE ADR (a)		8,089		3,478,594
Arrowhead Pharmaceuticals, Inc. (a)		14,161		368,044
Arvinas, Inc. (a)		7,198		191,611
Ascendis Pharma AS ADR (a)		2,838		387,046
Atrion Corp.		337		152,469
Autolus Therapeutics PLC ADR (a)		9,351		32,541
Avanos Medical, Inc. (a)		13,369		266,310
Avantor, Inc. (a)		126,900		2,690,280
Avidity Biosciences, Inc. (a)		15,688		640,855
Azenta, Inc. (a)		1,624		85,455
Baxter International, Inc.		58,161		1,945,485
BeiGene Ltd. ADR (a)		506		72,191
Bio-Techne Corp.		18,069		1,294,644
Biogen, Inc. (a)		8,300		1,924,106
Black Diamond Therapeutics, Inc. (a)		59,022		275,043
Blueprint Medicines Corp. (a)		11,174		1,204,334
Bridgebio Pharma, Inc. (a)		2,040		51,673
Bruker Corp.		44,171		2,818,552
Cabaletta Bio, Inc. (a)		23,140		173,087
Capsule, Corp. (Acquired 4/07/21, Cost $72,342) (a) (b) (c) (e)		4,992		11,382
Cargo Therapeutics, Inc. (a)		2,279		37,421
Catalent, Inc. (a)		32,177		1,809,313
Celldex Therapeutics, Inc. (a)		3,472		128,499
Centessa Pharmaceuticals PLC ADR (a)		7,992		72,168
Certara, Inc. (a)		17,736		245,644
CG oncology, Inc. (a)		379		11,965
Charles River Laboratories International, Inc. (a)		2,494		515,211
The Cooper Cos., Inc.		21,500		1,876,950
Crinetics Pharmaceuticals, Inc. (a)		12,964		580,658
CRISPR Therapeutics AG (a) (d)		9,477		511,853
Cytokinetics, Inc. (a)		38,851		2,104,947
Day One Biopharmaceuticals, Inc. (a)		5,025		69,244
DENTSPLY SIRONA, Inc.		80,532		2,006,052
Disc Medicine, Inc. (a)		2,114		95,278
Doximity, Inc. Class A (a)		4,474		125,138
Dyne Therapeutics, Inc. (a)		2,366		83,496
Elanco Animal Health, Inc. (a)		132,954		1,918,526
Enovis Corp. (a)		20,433		923,572
Ensign Group, Inc.		5,781		715,052
Entrada Therapeutics, Inc. (a) (d)		7,135		101,674
Erasca, Inc. (a)		42,830		101,079
Eurofins Scientific SE (d)		11,772		585,266
Exact Sciences Corp. (a)		9,100		384,475
EyePoint Pharmaceuticals, Inc. (a) (d)		16,237		141,262
Generation Bio Co. (a)		22,284		62,841
Geron Corp. (a)		7,484		31,732
Ginkgo Bioworks, Inc., Earnout Shares 15.00 (Acquired 9/17/21, Cost $0) (a) (b) (c) (e)		874		15
Ginkgo Bioworks, Inc., Earnout Shares 17.50 (Acquired 9/17/21, Cost $0) (a) (b) (c) (e)		874		12
Ginkgo Bioworks, Inc., Earnout Shares 20.00 (Acquired 9/17/21, Cost $0) (a) (b) (c) (e)		874		9
Grifols SA (a)		7,415		46,752
Gyroscope Therapeutics, Milestone Payment 1 (Acquired 2/18/22, Cost $31,900) (a) (b) (c) (e)		31,900		—

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Gyroscope Therapeutics, Milestone Payment 2 (Acquired 2/18/22, Cost $21,260) (a) (b) (c) (e)		21,260	$	—
Gyroscope Therapeutics, Milestone Payment 3 (Acquired 2/18/22, Cost $21,260) (a) (b) (c) (e)		21,260		—
Haemonetics Corp. (a)		6,491		537,000
HilleVax, Inc. (a)		18,651		269,693
Hologic, Inc. (a)		68,400		5,078,700
ICON PLC (a)		3,566		1,117,834
Ideaya Biosciences, Inc. (a)		6,633		232,885
IGM Biosciences, Inc. (a) (d)		7,918		54,397
Immatics NV (a)		44,019		511,501
Immunocore Holdings PLC ADR (a)		19,896		674,275
Immunome, Inc. (a)		23,689		286,637
Immunovant, Inc. (a)		11,974		316,114
Innovage Holding Corp. (a)		32,357		160,491
Insmed, Inc. (a)		28,484		1,908,428
Intellia Therapeutics, Inc. (a)		1,809		40,485
Intra-Cellular Therapies, Inc. (a)		2,063		141,295
Ionis Pharmaceuticals, Inc. (a)		48,272		2,300,644
Iovance Biotherapeutics, Inc. (a)		15,537		124,607
Keros Therapeutics, Inc. (a)		3,253		148,662
Kymera Therapeutics, Inc. (a)		10,979		327,723
Lantheus Holdings, Inc. (a)		4,439		356,407
Legend Biotech Corp. ADR (a)		1,548		68,561
LifeStance Health Group, Inc. (a) (d)		44,046		216,266
Longboard Pharmaceuticals, Inc. (a)		3,239		87,550
Madrigal Pharmaceuticals, Inc. (a) (d)		924		258,868
Masimo Corp. (a)		6,135		772,642
Merus NV (a)		4,281		253,307
Mettler-Toledo International, Inc. (a)		840		1,173,976
Mirum Pharmaceuticals, Inc. (a)		2,714		92,792
Molina Healthcare, Inc. (a)		10,474		3,113,920
Monte Rosa Therapeutics, Inc. (a)		15,805		59,111
MoonLake Immunotherapeutics (a)		2,236		98,317
Morphic Holding, Inc. (a)		2,870		97,781
Multiplan Corp. (a)		52,168		20,262
Neogen Corp. (a)		28,169		440,281
NeoGenomics, Inc. (a)		35,778		496,241
Neumora Therapeutics, Inc. (a) (d)		28,030		275,535
Neurocrine Biosciences, Inc. (a)		1,042		143,452
Nkarta, Inc. (a)		5,145		30,407
Novocure Ltd. (a)		10,772		184,524
Nurix Therapeutics, Inc. (a)		18,762		391,563
Nuvalent, Inc., Class A (a)		1,417		107,494
Pennant Group, Inc. (a)		11,346		263,114
Penumbra, Inc. (a)		4,977		895,711
Phreesia, Inc. (a)		11,057		234,408
Pliant Therapeutics, Inc. (a)		8,903		95,707
Praxis Precision Medicines, Inc. (a)		938		38,796
Prime Medicine, Inc. (a) (d)		23,584		121,222
Privia Health Group, Inc. (a)		29,438		511,632
PROCEPT BioRobotics Corp. (a)		6,830		417,245
Progyny, Inc. (a)		8,131		232,628
Prothena Corp. PLC (a)		6,683		137,937
Quidelortho Corp. (a)		36,336		1,207,082
RadNet, Inc. (a)		2,639		155,490
Rapport Therapeutics, Inc. (a)		8,100		188,406
Relay Therapeutics, Inc. (a)		6,895		44,955

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Repligen Corp. (a)		11,100	$	1,399,266
Replimune Group, Inc. (a)		13,217		118,953
REVOLUTION Medicines, Inc. (a)		6,778		263,054
Rocket Pharmaceuticals, Inc. (a)		3,563		76,711
Sana Biotechnology, Inc. (a) (d)		9,736		53,159
Sarepta Therapeutics, Inc. (a)		5,686		898,388
Sartorius Stedim Biotech		970		158,492
Scholar Rock Holding Corp. (a)		13,852		115,387
Select Medical Holdings Corp.		152,982		5,363,549
Sotera Health Co. (a)		36,705		435,688
SpringWorks Therapeutics, Inc. (a)		5,212		196,336
Stevanato Group SpA (d)		21,134		387,598
Structure Therapeutics, Inc. ADR (a)		6,049		237,544
Tango Therapeutics, Inc. (a)		24,498		210,193
Teleflex, Inc.		18,440		3,878,485
Tempus AI, Inc. (a) (d)		128		4,480
Tempus AI, Inc., Lockup Shares (Acquired 6/14/24, Cost $145,493) (a) (b) (e)		6,544		229,040
Tenaya Therapeutics, Inc. (a)		9,185		28,473
Third Harmonic Bio, Inc. (a)		11,106		144,378
Ultragenyx Pharmaceutical, Inc. (a)		3,318		136,370
Vaxcyte, Inc. (a)		21,802		1,646,269
Veeva Systems, Inc. Class A (a)		23,437		4,289,205
Vera Therapeutics, Inc. (a)		5,186		187,629
Verve Therapeutics, Inc. (a)		23,281		113,611
Viatris, Inc.		103,233		1,097,367
Waystar Holding Corp. (a)		21,045		452,467
West Pharmaceutical Services, Inc.		6,918		2,278,720
Xencor, Inc. (a)		5,350		101,275
Xenon Pharmaceuticals, Inc. (a)		7,158		279,090
Zentalis Pharmaceuticals, Inc. (a)		8,124		33,227
Zimmer Biomet Holdings, Inc.		21,235		2,304,635
				102,960,903
Industrials — 17.9%
AAON, Inc.		7,262		633,537
Alamo Group, Inc.		578		99,994
Allegiant Travel Co.		3,554		178,517
API Group Corp. (a)		65,253		2,455,470
Arcosa, Inc.		6,576		548,504
Armstrong World Industries, Inc.		6,955		787,584
Ashtead Group PLC		8,339		555,619
Atmus Filtration Technologies, Inc. (a)		5,038		144,994
AZZ, Inc.		13,408		1,035,768
Beacon Roofing Supply, Inc. (a)		18,311		1,657,146
Bombas LLC (Acquired 2/12/21, Cost $183,470) (a) (b) (c) (e)		41,514		108,767
Booz Allen Hamilton Holding Corp.		12,608		1,940,371
Brady Corp. Class A		10,572		697,963
BrightView Holdings, Inc. (a)		39,924		530,989
Broadridge Financial Solutions, Inc.		8,200		1,615,400
BWX Technologies, Inc.		12,736		1,209,920
Cadre Holdings, Inc.		4,628		155,316
Carrier Global Corp.		17,079		1,077,343
Casella Waste Systems, Inc. Class A (a)		8,168		810,429
Conduent, Inc. (a)		36,490		118,957
Crane Co.		5,474		793,621
CSW Industrials, Inc.		2,741		727,215
Dayforce, Inc. (a) (d)		38,871		1,928,002

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Douglas Dynamics, Inc.		2,230	$	52,182
Enerpac Tool Group Corp.		10,807		412,611
Enpro, Inc.		5,269		767,008
Equifax, Inc.		12,100		2,933,766
Esab Corp.		61,945		5,849,466
ESCO Technologies, Inc.		5,750		603,980
Federal Signal Corp.		9,529		797,291
Ferguson PLC		4,600		890,790
Fortive Corp.		28,500		2,111,850
FTAI Aviation Ltd.		7,440		768,031
FTI Consulting, Inc. (a)		2,283		492,055
GE Vernova, Inc. (a)		9,889		1,696,062
GMS, Inc. (a)		3,650		294,227
Graco, Inc.		4,255		337,336
Helios Technologies, Inc.		2,914		139,144
Herc Holdings, Inc.		2,739		365,081
Howmet Aerospace, Inc.		3,800		294,994
Hubbell, Inc.		2,667		974,735
Huntington Ingalls Industries, Inc.		5,242		1,291,262
Hydrofarm Holdings Group, Inc. (a)		6,021		4,155
IDEX Corp.		14,416		2,900,499
Ingersoll Rand, Inc.		52,988		4,813,430
JB Hunt Transport Services, Inc.		24,397		3,903,520
John Bean Technologies Corp.		6,178		586,725
L3Harris Technologies, Inc.		8,561		1,922,629
Landstar System, Inc.		5,703		1,052,090
Leidos Holdings, Inc.		1,766		257,624
Leonardo DRS, Inc. (a)		31,475		802,927
Loar Holdings, Inc. (a)		4,754		253,911
Matson, Inc.		2,348		307,518
Middleby Corp. (a)		9,519		1,167,125
Moog, Inc. Class A		3,527		590,067
MSA Safety, Inc.		3,582		672,306
MSC Industrial Direct Co., Inc. Class A		2,780		220,482
Mueller Water Products, Inc. Class A		20,902		374,564
MYR Group, Inc. (a)		654		88,754
Norfolk Southern Corp.		9,133		1,960,764
NV5 Global, Inc. (a)		2,193		203,883
Old Dominion Freight Line, Inc.		7,553		1,333,860
Parsons Corp. (a)		18,476		1,511,522
Paycor HCM, Inc. (a)		43,319		550,151
Paylocity Holding Corp. (a)		27,017		3,562,192
Quanta Services, Inc.		2,500		635,225
RBC Bearings, Inc. (a)		11,499		3,102,200
Rentokil Initial PLC		110,586		644,804
Rolls-Royce Holdings PLC (a)		158,861		918,281
Rush Enterprises, Inc. Class A		13,930		583,249
Saia, Inc. (a)		11,292		5,355,683
Shoals Technologies Group, Inc. Class A (a)		15,600		97,344
Shyft Group, Inc.		6,498		77,066
Simpson Manufacturing Co., Inc.		700		117,971
SiteOne Landscape Supply, Inc. (a)		17,759		2,156,120
Southwest Airlines Co.		105,054		3,005,595
Spirax Group PLC		2,424		260,051
Spirit AeroSystems Holdings, Inc. Class A (a)		58,074		1,908,892
SPX Technologies, Inc. (a)		8,567		1,217,713
SS&C Technologies Holdings, Inc.		23,762		1,489,165
Stanley Black & Decker, Inc.		38,379		3,066,098

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Sun Country Airlines Holdings, Inc. (a)		7,850	$	98,596
Tetra Tech, Inc.		3,211		656,585
Textron, Inc.		61,638		5,292,239
Thermon Group Holdings, Inc. (a)		25,521		785,026
Toro Co.		34,313		3,208,609
Trane Technologies PLC		3,325		1,093,692
Transcat, Inc. (a)		802		95,983
TransUnion		11,414		846,462
Trex Co., Inc. (a)		830		61,520
UFP Industries, Inc.		6,940		777,280
UL Solutions, Inc. Class A		8,411		354,860
UniFirst Corp.		448		76,845
United Rentals, Inc.		2,260		1,461,610
Valmont Industries, Inc.		895		245,633
Veralto Corp.		12,600		1,202,922
Verisk Analytics, Inc.		4,400		1,186,020
Verra Mobility Corp. (a)		57,093		1,552,930
VSE Corp.		7,610		671,811
Waste Connections, Inc.		4,400		771,584
WillScot Mobile Mini Holdings Corp. (a)		43,917		1,653,036
Zurn Elkay Water Solutions Corp. Class C		28,216		829,550
				117,482,245
Information Technology — 15.5%
Agilysys, Inc. (a)		2,969		309,192
Allegro MicroSystems, Inc. (a)		17,144		484,147
Altair Engineering, Inc. Class A (a)		6,771		664,100
Amphenol Corp. Class A		21,800		1,468,666
Amplitude, Inc. Class A (a)		47,984		427,058
Apiture, Inc. (Acquired 7/01/20-6/30/22, Cost $97,636) (a) (b) (c) (e)		6,130		102,923
Appfolio, Inc. Class A (a)		1,393		340,686
Atlassian Corp. Class A (a)		6,100		1,078,968
Aurora Innovation, Inc. (a) (d)		63,157		174,945
Bill Holdings, Inc. (a)		20,937		1,101,705
Braze, Inc. Class A (a)		12,192		473,537
CCC Intelligent Solutions Holdings, Inc. (a)		194,750		2,163,672
Checkr, Inc. (Acquired 6/29/18-12/02/19, Cost $116,452) (a) (b) (c) (e)		15,444		66,718
Coalition, Inc. (Acquired 9/13/21, Cost $4,230) (a) (b) (c) (e)		256		2,017
Cognex Corp.		21,813		1,019,976
Confluent, Inc. Class A (a)		14,564		430,075
Corning, Inc.		129,035		5,013,010
Crowdstrike Holdings, Inc. Class A (a)		3,662		1,403,242
CTS Corp.		8,517		431,216
Databricks, Inc. (Acquired 7/24/20-8/28/20, Cost $24,732) (a) (b) (c) (e)		1,545		113,558
Datadog, Inc. Class A (a)		4,850		628,996
Descartes Systems Group, Inc. (a)		18,810		1,821,560
Diodes, Inc. (a)		8,650		622,194
DocuSign, Inc. (a)		30,479		1,630,626
DoubleVerify Holdings, Inc. (a)		34,008		662,136
Endava PLC Sponsored ADR (a)		8,436		246,669
Enfusion, Inc. Class A (a)		9,311		79,330
Entegris, Inc.		14,094		1,908,328
Envestnet, Inc. (a)		8,340		522,001
Fair Isaac Corp. (a)		1,900		2,828,454
Fortinet, Inc. (a)		50,750		3,058,702
Globant SA (a)		11,946		2,129,494
GoDaddy, Inc. Class A (a)		12,922		1,805,333
Gusto, Inc. (Acquired 8/18/20-11/09/20, Cost $204,799) (a) (b) (c) (e)		15,332		285,022

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
HubSpot, Inc. (a)		2,550	$	1,503,964
Insight Enterprises, Inc. (a)		3,485		691,285
Intapp, Inc. (a)		19,233		705,274
JFrog Ltd. (a)		15,701		589,572
Keysight Technologies, Inc. (a)		12,700		1,736,725
Knowles Corp. (a)		5,830		100,626
Lattice Semiconductor Corp. (a)		50,695		2,939,803
Littelfuse, Inc.		3,460		884,341
MACOM Technology Solutions Holdings, Inc. (a)		19,044		2,122,835
Manhattan Associates, Inc. (a)		812		200,304
Marvell Technology, Inc.		78,255		5,470,024
Microchip Technology, Inc.		57,500		5,261,250
Mirion Technologies, Inc. (a)		113,023		1,213,867
MKS Instruments, Inc.		36,432		4,757,291
Monday.com Ltd. (a)		5,748		1,383,888
MongoDB, Inc. (a)		3,489		872,110
Monolithic Power Systems, Inc.		826		678,708
Napco Security Technologies, Inc.		7,471		388,118
nCino, Inc. (a) (d)		13,248		416,650
Novanta, Inc. (a)		6,383		1,041,131
NXP Semiconductors NV		4,200		1,130,178
Onto Innovation, Inc. (a)		7,451		1,635,942
PAR Technology Corp. (a) (d)		36,141		1,701,880
Power Integrations, Inc.		6,199		435,108
Procore Technologies, Inc. (a)		18,367		1,217,916
PTC, Inc. (a)		17,748		3,224,279
Pure Storage, Inc. Class A (a)		31,865		2,046,052
Roper Technologies, Inc.		4,326		2,438,393
Samsara, Inc. Class A (a)		31,664		1,067,077
ServiceTitan, Inc. (Acquired 11/09/18-5/04/21, Cost $28,780) (a) (b) (c) (e)		618		48,729
Socure, Inc. (Acquired 12/22/21, Cost $62,185) (a) (b) (c) (e)		3,870		24,188
Tanium, Inc., Class B (Acquired 9/24/20, Cost $30,277) (a) (b) (c) (e)		2,657		13,046
TE Connectivity Ltd.		18,448		2,775,133
Teledyne Technologies, Inc. (a)		6,794		2,635,936
Themis Solutions, Inc. (Acquired 4/14/21, Cost $108,219) (a) (b) (c) (e)		4,820		167,749
Tyler Technologies, Inc. (a)		4,800		2,413,344
Varonis Systems, Inc. (a)		7,376		353,827
Vertex, Inc. Class A (a)		5,700		205,485
Viavi Solutions, Inc. (a)		50,384		346,138
Vishay Intertechnology, Inc.		16,395		365,608
Vontier Corp.		15,885		606,807
Western Digital Corp. (a)		56,250		4,262,062
Workiva, Inc. (a)		9,872		720,557
Zebra Technologies Corp. Class A (a)		6,569		2,029,361
Zoom Video Communications, Inc. Class A (a)		16,000		947,040
				101,267,857
Materials — 4.7%
Alpha Metallurgical Resources, Inc.		179		50,215
Avery Dennison Corp.		12,600		2,754,990
Ball Corp.		67,868		4,073,437
Carpenter Technology Corp.		3,232		354,163
Clearwater Paper Corp. (a)		1,704		82,593
Constellium SE (a)		80,930		1,525,530
DS Smith PLC		255,877		1,354,789
Element Solutions, Inc.		55,052		1,493,010
ERO Copper Corp. (ERO CN) (a) (d)		21,905		468,186
ERO Copper Corp. (ERO US) (a) (d)		5,800		124,004

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
First Quantum Minerals Ltd.		10,571	$	138,855
FMC Corp.		27,622		1,589,646
Franco-Nevada Corp. (d)		12,257		1,453,226
Freeport-McMoRan, Inc.		16,708		812,009
Hawkins, Inc.		1,768		160,888
HB Fuller Co.		5,013		385,800
Hudbay Minerals, Inc.		8,441		76,391
International Paper Co.		29,459		1,271,156
Louisiana-Pacific Corp.		7,102		584,708
Martin Marietta Materials, Inc.		5,031		2,725,796
Orion SA		18,008		395,095
Osisko Gold Royalties Ltd. (d)		9,150		142,596
Pactiv Evergreen, Inc.		17,708		200,455
Quaker Chemical Corp.		1,915		324,975
Reliance, Inc.		4,922		1,405,723
Royal Gold, Inc.		3,047		381,363
RPM International, Inc.		7,600		818,368
Scotts Miracle-Gro Co.		18,260		1,187,996
Sealed Air Corp.		42,395		1,474,922
Summit Materials, Inc. Class A (a)		60,378		2,210,439
West Fraser Timber Co. Ltd. (WFG (CN) (d)		6,393		491,000
West Fraser Timber Co. Ltd. (WFG US) (d)		602		46,276
				30,558,600
Real Estate — 4.0%
American Assets Trust, Inc.		12,757		285,502
Apartment Investment & Management Co. Class A (a)		134,189		1,112,427
Apple Hospitality REIT, Inc.		36,446		529,925
Colliers International Group, Inc.		5,491		613,070
CoStar Group, Inc. (a)		11,353		841,711
CubeSmart		30,879		1,394,804
DigitalBridge Group, Inc.		69,400		950,780
Douglas Emmett, Inc.		21,595		287,429
EastGroup Properties, Inc.		7,930		1,348,893
Empire State Realty Trust, Inc. Class A		12,165		114,108
Equity Residential		22,606		1,567,500
Essential Properties Realty Trust, Inc.		29,367		813,760
FirstService Corp.		7,765		1,183,153
Flagship Communities REIT		14,991		208,975
Healthcare Realty Trust, Inc.		19,857		327,243
Highwoods Properties, Inc.		16,884		443,543
Independence Realty Trust, Inc.		77,030		1,443,542
Kilroy Realty Corp.		10,640		331,649
The Macerich Co.		27,466		424,075
NETSTREIT Corp.		33,523		539,720
Opendoor Technologies, Inc. (a)		77,270		142,177
Pebblebrook Hotel Trust		40,573		557,879
PotlatchDeltic Corp.		2,766		108,953
Rayonier, Inc.		37,530		1,091,748
Regency Centers Corp.		22,358		1,390,668
Rexford Industrial Realty, Inc.		45,231		2,016,850
Safehold, Inc.		23,587		454,993
Saul Centers, Inc.		8,282		304,529
St. Joe Co.		7,894		431,802
Sun Communities, Inc.		10,530		1,267,180
Terreno Realty Corp.		26,747		1,582,887
UMH Properties, Inc.		30,657		490,205
Vornado Realty Trust		32,989		867,281

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Weyerhaeuser Co.		30,915	$	877,677
				26,346,638
Utilities — 2.5%
Ameren Corp.		26,353		1,873,962
Artesian Resources Corp. Class A		4,966		174,605
California Water Service Group		17,637		855,218
CenterPoint Energy, Inc.		31,636		980,083
Chesapeake Utilities Corp.		13,072		1,388,246
Constellation Energy Corp.		4,257		852,549
Dominion Energy, Inc.		31,522		1,544,578
FirstEnergy Corp.		62,888		2,406,724
IDACORP, Inc.		9,628		896,848
MGE Energy, Inc.		5,430		405,730
Middlesex Water Co.		8,899		465,062
OGE Energy Corp.		22,607		807,070
ONE Gas, Inc.		10,657		680,449
PG&E Corp.		94,925		1,657,390
PNM Resources, Inc.		30,504		1,127,428
Talen Energy Corp. (a)		4,487		498,147
				16,614,089
TOTAL COMMON STOCK (Cost $544,642,213)				625,316,819
PREFERRED STOCK — 1.3%
Communication Services — 0.0%
Minted, Inc., Series E (Acquired 10/30/18, Cost $113,257) (a) (b) (c) (e)		8,410		109,751
Consumer Discretionary — 0.0%
1661, Inc., Series F (Acquired 5/28/21, Cost $288,836) (a) (b) (c) (e)		49,629		44,170
Nuro, Inc., Series C (Acquired 10/30/20-3/02/21, Cost $282,254) (a) (b) (c) (e)		21,621		88,430
Nuro, Inc., Series D (Acquired 10/29/21, Cost $252,025) (a) (b) (c) (e)		12,090		49,448
OfferUp, Inc., Series F (Acquired 7/01/20, Cost $9,217) (a) (b) (c) (e)		4,025		3,502
				185,550
Consumer Staples — 0.1%
Epirus, Inc., Series C-2 (Acquired 1/28/21, Cost $324,592) (a) (b) (c) (e)		58,131		283,098
Farmer's Business Network, Inc., Series E (Acquired 2/11/19, Cost $191,081) (a) (b) (c) (e)		8,198		30,906
Farmer's Business Network, Inc., Series F (Acquired 7/31/20, Cost $124,028) (a) (b) (c) (e)		3,752		14,145
				328,149
Financials — 0.0%
CRB Group, Inc., Series D (Acquired 1/28/22, Cost $255,280) (a) (b) (c) (e)		2,428		177,268
Stash Financial, Inc., Series F (Acquired 4/24/20, Cost $126,801) (a) (b) (c) (e)		5,060		35,015
Stash Financial, Inc., Series G (Acquired 1/26/21, Cost $174,908) (a) (b) (c) (e)		4,667		53,577
				265,860
Health Care — 0.5%
Capsule, Corp., Series 1 D (Acquired 4/07/21, Cost $72,328) (a) (b) (c) (e)		4,991		11,379

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Caris Life Sciences, Inc., Series C (Acquired 8/14/20, Cost $125,312) (a) (b) (c) (e)		45,403	$	165,267
Caris Life Sciences, Inc., Series D (Acquired 5/11/21, Cost $378,132) (a) (b) (c) (e)		46,683		169,926
CelLink, Inc., Series D (Acquired 1/20/22, Cost $223,836) (a) (b) (c) (e)		10,749		30,420
Cleerly, Inc. Series C (Acquired 7/08/22, Cost $200,211) (a) (b) (c) (e)		16,995		152,445
Color Health, Inc., Series D (Acquired 12/17/20, Cost $43,490) (a) (b) (c) (e)		1,155		20,444
Color Health, Inc., Series D-1 (Acquired 1/13/20, Cost $56,632) (a) (b) (c) (e)		2,655		31,833
Color Health, Inc., Series E (Acquired 10/26/21, Cost $15,095) (a) (b) (c) (e)		151		5,966
DTX Company, Series A-1 (Acquired 2/04/22, Cost $31,212) (a) (b) (c) (e)		17,154		15,309
Eikon Therapeutics, Inc., Series B (Acquired 12/03/21, Cost $89,186) (a) (b) (c) (e)		5,042		108,398
Genesis Therapeutics, Inc., Series A (Acquired 11/24/20, Cost $25,262) (a) (b) (c) (e)		4,946		25,262
Honor Technology, Inc., Series D (Acquired 10/16/20, Cost $225,290) (a) (b) (c) (e)		93,556		159,981
Honor Technology, Inc., Series E (Acquired 9/29/21, Cost $116,646) (a) (b) (c) (e)		36,897		63,094
Inscripta, Inc., Series E (Acquired 3/30/21, Cost $148,812) (a) (b) (c) (e)		16,853		31,515
Insitro, Inc., Series B (Acquired 5/21/20, Cost $34,456) (a) (b) (c) (e)		5,530		101,150
Insitro, Inc., Series C (Acquired 4/07/21, Cost $62,208) (a) (b) (c) (e)		3,401		62,208
Kardium, Inc., Series D-5 (Acquired 11/29/18, Cost $29,906) (a) (b) (c) (e)		30,866		26,236
Kardium, Inc., Series D-6 (Acquired 1/08/21, Cost $145,349) (a) (b) (c) (e)		143,083		121,621
Laronde, Inc., Series B (Acquired 7/28/21, Cost $109,340) (a) (b) (c) (e)		3,905		16,401
National Resilience, Inc., Series B (Acquired 10/23/20, Cost $263,720) (a) (b) (c) (e)		19,306		897,150
National Resilience, Inc., Series C (Acquired 6/09/21, Cost $315,045) (a) (b) (c) (e)		7,094		329,658
Ring Therapeutics, Inc., Series B (Acquired 4/12/21, Cost $50,885) (a) (b) (c) (e)		5,531		50,885
Sartorius AG 0.340%		2,365		554,285
Tessera Therapeutics, Inc., Series C (Acquired 2/25/22, Cost $34,499) (a) (b) (c) (e)		1,687		34,499
Treeline Biosciences, Inc., Series A (Acquired 4/09/21, Cost $40,640) (a) (b) (c) (e)		5,192		40,640
				3,225,972
Industrials — 0.1%
ABL Space Systems Company, Series B (Acquired 3/24/21, Cost $328,985) (a) (b) (c) (e)		7,305		256,177
Haul Hub, Inc., Series B (Acquired 2/14/20-3/03/21, Cost $108,854) (a) (b) (c) (e)		7,466		33,373
Haul Hub, Inc., Series C (Acquired 4/14/22, Cost $43,061) (a) (b) (c) (e)		2,282		10,201
Sila Nanotechnologies, Inc., Series F (Acquired 1/07/21, Cost $505,509) (a) (b) (c) (e)		12,248		239,495
				539,246
Information Technology — 0.5%
Checkr, Inc., Series C (Acquired 4/10/18, Cost $106,628) (a) (b) (c) (e)		23,433		101,231
Checkr, Inc., Series D (Acquired 9/06/19, Cost $308,786) (a) (b) (c) (e)		30,627		132,309
Coalition, Inc., Series E (Acquired 9/07/21, Cost $253,711) (a) (b) (c) (e)		15,355		120,997
Databricks, Inc., Series F (Acquired 10/22/19, Cost $104,923) (a) (b) (c) (e)		7,329		538,682
Databricks, Inc., Series G (Acquired 2/01/21, Cost $50,195) (a) (b) (c) (e)		849		62,402
Databricks, Inc., Series H (Acquired 8/31/21, Cost $114,856) (a) (b) (c) (e)		1,563		114,881
Flexe, Inc., Series C (Acquired 11/18/20, Cost $134,849) (a) (b) (c) (e)		11,083		70,488
Flexe, Inc., Series D (Acquired 4/07/22, Cost $73,849) (a) (b) (c) (e)		3,621		23,030
Gusto, Inc., Series B (Acquired 8/18/20, Cost $49,238) (a) (b) (c) (e)		3,644		67,742

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Gusto, Inc., Series B-2 (Acquired 8/18/20, Cost $91,936) (a) (b) (c) (e)		6,804	$	126,486
Gusto, Inc., Series C (Acquired 7/16/18, Cost $84,209) (a) (b) (c) (e)		11,076		205,903
Gusto, Inc., Series D (Acquired 7/16/19, Cost $187,638) (a) (b) (c) (e)		14,095		262,026
SecurityScorecard, Inc., Series E (Acquired 3/05/21, Cost $262,495) (a) (b) (c) (e)		51,969		273,877
Seismic Software, Inc., Series E (Acquired 12/13/18, Cost $117,981) (a) (b) (c) (e)		18,715		106,488
Seismic Software, Inc., Series F (Acquired 9/25/20, Cost $18,592) (a) (b) (c) (e)		2,115		12,034
ServiceTitan, Inc., Series A-1 (Acquired 11/09/18, Cost $263) (a) (b) (c) (e)		10		789
ServiceTitan, Inc., Series D (Acquired 11/09/18, Cost $124,743) (a) (b) (c) (e)		4,744		374,064
ServiceTitan, Inc., Series E (Acquired 4/23/20, Cost $7,435) (a) (b) (c) (e)		220		17,347
ServiceTitan, Inc., Series F (Acquired 3/25/21, Cost $25,650) (a) (b) (c) (e)		239		18,845
Socure, Inc., Series A (Acquired 12/22/21, Cost $75,555) (a) (b) (c) (e)		4,702		29,388
Socure, Inc., Series A-1 (Acquired 12/22/21, Cost $62,025) (a) (b) (c) (e)		3,860		24,125
Socure, Inc., Series B (Acquired 12/22/21, Cost $1,109) (a) (b) (c) (e)		69		431
Socure, Inc., Series E (Acquired 10/27/21, Cost $143,750) (a) (b) (c) (e)		8,946		55,913
Themis Solutions, Inc., Series AA (Acquired 4/14/21, Cost $24,473) (a) (b) (c) (e)		1,090		37,935
Themis Solutions, Inc., Series AB (Acquired 4/14/21, Cost $2,694) (a) (b) (c) (e)		120		4,176
Themis Solutions, Inc., Series B (Acquired 4/14/21, Cost $2,694) (a) (b) (c) (e)		120		4,176
Themis Solutions, Inc., Series E (Acquired 4/14/21, Cost $309,164) (a) (b) (c) (e)		8,790		305,916
				3,091,681
Materials — 0.1%
KoBold Metals, Inc., Series B-1 (Acquired 1/10/22, Cost $244,807) (a) (b) (c) (e)		8,931		655,178
Redwood Materials, Inc., Series C (Acquired 5/28/21, Cost $214,074) (a) (b) (c) (e)		4,516		232,664
				887,842
Real Estate — 0.0%
Evolve Vacation Rental Network, Inc., Series 8 (Acquired 3/29/18-6/15/18, Cost $44,816) (a) (b) (c) (e)		5,266		78,779
Evolve Vacation Rental Network, Inc., Series 9 (Acquired 5/29/20, Cost $20,111) (a) (b) (c) (e)		3,470		51,911
				130,690
TOTAL PREFERRED STOCK (Cost $9,850,249)				8,764,741
TOTAL EQUITIES (Cost $554,492,462)				634,081,560
	Principal Amount
BONDS & NOTES — 0.2%
CORPORATE DEBT — 0.2%
Diversified Financial Services — 0.0%
PRA Group, Inc.
7.375% 9/01/25 (f)	$	83,000		83,096

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Semiconductors — 0.2%
Wolfspeed, Inc.
Convertible, 0.250% 2/15/28	$	330,000	$	194,535
1.875% 12/01/29		1,265,000		697,015
				891,550
TOTAL CORPORATE DEBT (Cost $948,940)				974,646
TOTAL BONDS & NOTES (Cost $948,940)				974,646
	Number of Shares
RIGHTS — 0.0%
Health Care — 0.0%
AstraZeneca PLC, CVR (a) (b) (c)		16,791		—
TOTAL RIGHTS (Cost $5,205)				—
WARRANTS — 0.0%
Communication Services — 0.0%
Advantage Solutions, Inc., Expires 10/28/25, Strike 11.5 (a)		3,668		132
Financials — 0.0%
Grasshopper Bancorp, Inc. (Acquired 10/15/18, Cost $0) (a) (b) (c) (e)		1,432		444
Hagerty, Inc. (a) (b) (c)		3,040		8,004
				8,448
Health Care — 0.0%
REVOLUTION Medicines, Inc. (a)		1,166		83
TOTAL WARRANTS (Cost $11,320)				8,663
TOTAL LONG-TERM INVESTMENTS (Cost $555,457,927)				635,064,869
SHORT-TERM INVESTMENTS — 2.6%
Investment of Cash Collateral from Securities Loaned — 0.1%
State Street Navigator Securities Lending Government Money Market Portfolio (g)		956,968		956,968
Mutual Fund — 2.3%
T. Rowe Price Government Reserve Investment Fund		15,055,054		15,055,054
	Principal Amount
Repurchase Agreement — 0.2%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/28/24, 1.600%, due 7/01/24 (h)	$	1,433,662		1,433,662
TOTAL SHORT-TERM INVESTMENTS (Cost $17,445,684)				17,445,684

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund —  Portfolio of Investments (Continued)

	Value
TOTAL INVESTMENTS — 99.5% (Cost $572,903,611) (i)	$	652,510,553
Other Assets/(Liabilities) — 0.5%		3,022,338
NET ASSETS — 100.0%	$	655,532,891

Abbreviation Legend

ADR American Depositary Receipt

CVR Contingent Value Rights

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Non-income producing security.

(b) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At June 30, 2024, these securities amounted to a value of $9,671,116 or 1.48% of net assets.

(c) Investment is valued using significant unobservable inputs.

(d) Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2024, was $10,169,549 or 1.55% of net assets. The Fund received $9,679,032 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) Restricted security. Certain securities are restricted to resale. At June 30, 2024, these securities amounted to a value of $9,663,112 or 1.47% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

(f) Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At June 30, 2024, the aggregate market value of these securities amounted to $83,096 or 0.01% of net assets.

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

(h) Maturity value of $1,433,853. Collateralized by U.S. Government Agency obligations with a rate of 4.500%, maturity date of 3/31/26, and an aggregate market value, including accrued interest, of $1,462,465.

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

MassMutual Select T. Rowe Price Retirement Balanced Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 41.1%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		1,947,099	$	21,807,514
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		2,662,524		41,295,752
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		478,932		5,560,395
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		827,788		10,695,023
T. Rowe Price Hedged Equity Fund, Class I		757,021		9,106,957
				88,465,641
Fixed Income Funds — 58.9%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		5,131,202		43,974,400
T. Rowe Price Dynamic Credit Fund, Class I		337,156		2,970,348
T. Rowe Price Dynamic Global Bond Fund, Class I		990,048		7,633,268
T. Rowe Price Emerging Markets Bond Fund		857,774		7,771,435
T. Rowe Price Institutional Floating Rate Fund		301,628		2,853,401
T. Rowe Price Institutional High Yield Fund		941,578		7,297,226
T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I		9,028,402		42,433,490
T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I		904,854		6,650,674
T. Rowe Price U.S. Treasury Money Fund, Inc., Class I		5,375,277		5,375,277
				126,959,519
TOTAL MUTUAL FUNDS (Cost $213,659,231)				215,425,160
TOTAL LONG-TERM INVESTMENTS (Cost $213,659,231)				215,425,160
TOTAL INVESTMENTS — 100.0% (Cost $213,659,231) (b)				215,425,160
Other Assets/(Liabilities) — (0.0)%				(52,687)
NET ASSETS — 100.0%			$	215,372,473

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

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

MassMutual Select T. Rowe Price Retirement 2005 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 42.9%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		171,948	$	1,925,820
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		232,734		3,609,702
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		42,651		495,180
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		72,485		936,511
T. Rowe Price Hedged Equity Fund, Class I		66,560		800,711
				7,767,924
Fixed Income Funds — 57.1%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		438,364		3,756,780
T. Rowe Price Dynamic Credit Fund, Class I		28,759		253,367
T. Rowe Price Dynamic Global Bond Fund, Class I		84,305		649,992
T. Rowe Price Emerging Markets Bond Fund		71,912		651,521
T. Rowe Price Institutional Floating Rate Fund		25,421		240,483
T. Rowe Price Institutional High Yield Fund		80,322		622,495
T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I		667,795		3,138,635
T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I		79,186		582,014
T. Rowe Price U.S. Treasury Money Fund, Inc., Class I		456,684		456,684
				10,351,971
TOTAL MUTUAL FUNDS (Cost $17,304,607)				18,119,895
TOTAL LONG-TERM INVESTMENTS (Cost $17,304,607)				18,119,895
TOTAL INVESTMENTS — 100.0% (Cost $17,304,607) (b)				18,119,895
Other Assets/(Liabilities) — (0.0)%				(4,056)
NET ASSETS — 100.0%			$	18,115,839

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

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

MassMutual Select T. Rowe Price Retirement 2010 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 46.7%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		983,046	$	11,010,120
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		1,338,783		20,764,530
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		243,794		2,830,448
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		418,373		5,405,380
T. Rowe Price Hedged Equity Fund, Class I		382,257		4,598,557
				44,609,035
Fixed Income Funds — 53.3%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		2,200,001		18,854,008
T. Rowe Price Dynamic Credit Fund, Class I		139,856		1,232,131
T. Rowe Price Dynamic Global Bond Fund, Class I		423,343		3,263,973
T. Rowe Price Emerging Markets Bond Fund		358,491		3,247,928
T. Rowe Price Institutional Floating Rate Fund		125,414		1,186,418
T. Rowe Price Institutional High Yield Fund		397,699		3,082,169
T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I		3,108,585		14,610,348
T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I		418,583		3,076,583
T. Rowe Price U.S. Treasury Money Fund, Inc., Class I		2,386,241		2,386,241
				50,939,799
TOTAL MUTUAL FUNDS (Cost $94,298,823)				95,548,834
TOTAL LONG-TERM INVESTMENTS (Cost $94,298,823)				95,548,834
TOTAL INVESTMENTS — 100.0% (Cost $94,298,823) (b)				95,548,834
Other Assets/(Liabilities) — (0.0)%				(26,370)
NET ASSETS — 100.0%			$	95,522,464

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

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

MassMutual Select T. Rowe Price Retirement 2015 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 49.7%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		1,130,918	$	12,666,286
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		1,540,611		23,894,882
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		280,465		3,256,203
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		469,753		6,069,205
T. Rowe Price Hedged Equity Fund, Class I		438,397		5,273,914
				51,160,490
Fixed Income Funds — 50.3%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		2,297,031		19,685,557
T. Rowe Price Dynamic Credit Fund, Class I		145,125		1,278,549
T. Rowe Price Dynamic Global Bond Fund, Class I		433,614		3,343,166
T. Rowe Price Emerging Markets Bond Fund		367,711		3,331,463
T. Rowe Price Institutional Floating Rate Fund		130,370		1,233,300
T. Rowe Price Institutional High Yield Fund		413,699		3,206,165
T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I		2,936,148		13,799,896
T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I		450,472		3,310,967
T. Rowe Price U.S. Treasury Money Fund, Inc., Class I		2,636,051		2,636,051
				51,825,114
TOTAL MUTUAL FUNDS (Cost $101,188,786)				102,985,604
TOTAL LONG-TERM INVESTMENTS (Cost $101,188,786)				102,985,604
TOTAL INVESTMENTS — 100.0% (Cost $101,188,786) (b)				102,985,604
Other Assets/(Liabilities) — (0.0)%				(24,442)
NET ASSETS — 100.0%			$	102,961,162

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

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

MassMutual Select T. Rowe Price Retirement 2020 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 52.8%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		4,955,238	$	55,498,664
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		6,698,427		103,892,600
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		1,225,611		14,229,348
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		2,045,850		26,432,378
T. Rowe Price Hedged Equity Fund, Class I		1,923,598		23,140,885
				223,193,875
Fixed Income Funds — 47.2%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		9,079,997		77,815,573
T. Rowe Price Dynamic Credit Fund, Class I		565,423		4,981,374
T. Rowe Price Dynamic Global Bond Fund, Class I		1,674,071		12,907,088
T. Rowe Price Emerging Markets Bond Fund		1,425,559		12,915,562
T. Rowe Price Institutional Floating Rate Fund		500,723		4,736,838
T. Rowe Price Institutional High Yield Fund		1,619,285		12,549,457
T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I		10,280,901		48,320,235
T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I		1,825,903		13,420,389
T. Rowe Price U.S. Treasury Money Fund, Inc., Class I		11,728,329		11,728,329
				199,374,845
TOTAL MUTUAL FUNDS (Cost $413,713,115)				422,568,720
TOTAL LONG-TERM INVESTMENTS (Cost $413,713,115)				422,568,720
TOTAL INVESTMENTS — 100.0% (Cost $413,713,115) (b)				422,568,720
Other Assets/(Liabilities) — (0.0)%				(163,116)
NET ASSETS — 100.0%			$	422,405,604

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

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

MassMutual Select T. Rowe Price Retirement 2025 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 58.0%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		5,815,976	$	65,138,934
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		7,917,978		122,807,833
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		1,429,945		16,601,661
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		2,372,776		30,656,270
T. Rowe Price Hedged Equity Fund, Class I		1,924,494		23,151,658
				258,356,356
Fixed Income Funds — 42.0%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		8,841,957		75,775,570
T. Rowe Price Dynamic Credit Fund, Class I		476,529		4,198,217
T. Rowe Price Dynamic Global Bond Fund, Class I		1,649,775		12,719,764
T. Rowe Price Emerging Markets Bond Fund		1,334,806		12,093,344
T. Rowe Price Institutional Floating Rate Fund		463,064		4,380,581
T. Rowe Price Institutional High Yield Fund		1,436,362		11,131,808
T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I		8,446,766		39,699,801
T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I		1,960,826		14,412,071
T. Rowe Price U.S. Treasury Money Fund, Inc., Class I		12,855,369		12,855,369
				187,266,525
TOTAL MUTUAL FUNDS (Cost $432,391,648)				445,622,881
TOTAL LONG-TERM INVESTMENTS (Cost $432,391,648)				445,622,881
TOTAL INVESTMENTS — 100.0% (Cost $432,391,648) (b)				445,622,881
Other Assets/(Liabilities) — (0.0)%				(162,682)
NET ASSETS — 100.0%			$	445,460,199

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

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

MassMutual Select T. Rowe Price Retirement 2030 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 68.4%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		19,524,992	$	218,679,915
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		26,842,619		416,329,025
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		4,525,132		52,536,784
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		8,019,459		103,611,409
T. Rowe Price Hedged Equity Fund, Class I		2,682,838		32,274,538
				823,431,671
Fixed Income Funds — 31.6%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		19,704,211		168,865,088
T. Rowe Price Dynamic Credit Fund, Class I		394,617		3,476,575
T. Rowe Price Dynamic Global Bond Fund, Class I		3,698,042		28,511,902
T. Rowe Price Emerging Markets Bond Fund		2,730,727		24,740,388
T. Rowe Price Institutional Floating Rate Fund		948,703		8,974,729
T. Rowe Price Institutional High Yield Fund		3,048,239		23,623,855
T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I		10,368,022		48,729,704
T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I		5,599,910		41,159,336
T. Rowe Price U.S. Treasury Money Fund, Inc., Class I		32,726,970		32,726,970
				380,808,547
TOTAL MUTUAL FUNDS (Cost $1,162,353,445)				1,204,240,218
TOTAL LONG-TERM INVESTMENTS (Cost $1,162,353,445)				1,204,240,218
TOTAL INVESTMENTS — 100.0% (Cost $1,162,353,445) (b)				1,204,240,218
Other Assets/(Liabilities) — (0.0)%				(573,370)
NET ASSETS — 100.0%			$	1,203,666,848

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

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

MassMutual Select T. Rowe Price Retirement 2035 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 80.0%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		13,425,202	$	150,362,259
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		18,624,667		288,868,585
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		2,946,321		34,206,783
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		5,547,277		71,670,818
				545,108,445
Fixed Income Funds — 20.0%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		7,849,515		67,270,345
T. Rowe Price Dynamic Global Bond Fund, Class I		1,474,897		11,371,456
T. Rowe Price Emerging Markets Bond Fund		940,442		8,520,401
T. Rowe Price Institutional Floating Rate Fund		318,991		3,017,651
T. Rowe Price Institutional High Yield Fund		1,094,492		8,482,316
T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I		337,452		1,586,025
T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I		2,833,448		20,825,843
T. Rowe Price U.S. Treasury Money Fund, Inc., Class I		15,576,003		15,576,003
				136,650,040
TOTAL MUTUAL FUNDS (Cost $651,032,131)				681,758,485
TOTAL LONG-TERM INVESTMENTS (Cost $651,032,131)				681,758,485
TOTAL INVESTMENTS — 100.0% (Cost $651,032,131) (b)				681,758,485
Other Assets/(Liabilities) — (0.0)%				(323,293)
NET ASSETS — 100.0%			$	681,435,192

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

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

MassMutual Select T. Rowe Price Retirement 2040 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 89.6%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		25,209,268	$	282,343,807
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		35,414,401		549,277,363
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		5,524,263		64,136,692
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		10,410,190		134,499,649
				1,030,257,511
Fixed Income Funds — 10.5%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		6,387,134		54,737,738
T. Rowe Price Dynamic Global Bond Fund, Class I		1,203,528		9,279,204
T. Rowe Price Emerging Markets Bond Fund		583,837		5,289,562
T. Rowe Price Institutional Floating Rate Fund		208,079		1,968,426
T. Rowe Price Institutional High Yield Fund		758,104		5,875,307
T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I		571,204		2,684,661
T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I		2,690,513		19,775,267
T. Rowe Price U.S. Treasury Money Fund, Inc., Class I		20,626,239		20,626,239
				120,236,404
TOTAL MUTUAL FUNDS (Cost $1,081,215,671)				1,150,493,915
TOTAL LONG-TERM INVESTMENTS (Cost $1,081,215,671)				1,150,493,915
TOTAL INVESTMENTS — 100.1% (Cost $1,081,215,671) (b)				1,150,493,915
Other Assets/(Liabilities) — (0.1)%				(606,394)
NET ASSETS — 100.0%			$	1,149,887,521

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

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

MassMutual Select T. Rowe Price Retirement 2045 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 96.1%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		13,118,346	$	146,925,479
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		18,643,064		289,153,916
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		2,896,582		33,629,323
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		5,417,895		69,999,208
				539,707,926
Fixed Income Funds — 4.0%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		891,478		7,639,962
T. Rowe Price Dynamic Global Bond Fund, Class I		154,409		1,190,496
T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I		277,627		1,304,848
T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I		551,919		4,056,605
T. Rowe Price U.S. Treasury Money Fund, Inc., Class I		8,019,831		8,019,831
				22,211,742
TOTAL MUTUAL FUNDS (Cost $525,951,214)				561,919,668
TOTAL LONG-TERM INVESTMENTS (Cost $525,951,214)				561,919,668
TOTAL INVESTMENTS — 100.1% (Cost $525,951,214) (b)				561,919,668
Other Assets/(Liabilities) — (0.1)%				(282,406)
NET ASSETS — 100.0%			$	561,637,262

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

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

MassMutual Select T. Rowe Price Retirement 2050 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 97.9%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		21,274,264	$	238,271,754
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		30,267,008		469,441,299
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		4,707,520		54,654,310
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		8,815,561		113,897,049
				876,264,412
Fixed Income Funds — 2.2%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		572,844		4,909,273
T. Rowe Price Dynamic Global Bond Fund, Class I		102,959		793,814
T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I		443,752		2,085,632
T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I		305,054		2,242,150
T. Rowe Price U.S. Treasury Money Fund, Inc., Class I		9,795,822		9,795,822
				19,826,691
TOTAL MUTUAL FUNDS (Cost $833,025,756)				896,091,103
TOTAL LONG-TERM INVESTMENTS (Cost $833,025,756)				896,091,103
TOTAL INVESTMENTS — 100.1% (Cost $833,025,756) (b)				896,091,103
Other Assets/(Liabilities) — (0.1)%				(489,267)
NET ASSETS — 100.0%			$	895,601,836

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

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

MassMutual Select T. Rowe Price Retirement 2055 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 98.6%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		8,429,758	$	94,413,290
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		12,007,567		186,237,364
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		1,888,887		21,929,980
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		3,473,854		44,882,199
				347,462,833
Fixed Income Funds — 1.5%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		176,537		1,512,922
T. Rowe Price Dynamic Global Bond Fund, Class I		37,083		285,907
T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I		174,519		820,239
T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I		92,088		676,844
T. Rowe Price U.S. Treasury Money Fund, Inc., Class I		1,798,218		1,798,218
				5,094,130
TOTAL MUTUAL FUNDS (Cost $321,303,825)				352,556,963
TOTAL LONG-TERM INVESTMENTS (Cost $321,303,825)				352,556,963
TOTAL INVESTMENTS — 100.1% (Cost $321,303,825) (b)				352,556,963
Other Assets/(Liabilities) — (0.1)%				(181,767)
NET ASSETS — 100.0%			$	352,375,196

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

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

MassMutual Select T. Rowe Price Retirement 2060 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 98.6%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		6,810,457	$	76,277,115
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		9,697,275		150,404,737
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		1,511,658		17,550,350
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		2,807,824		36,277,084
				280,509,286
Fixed Income Funds — 1.5%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		149,646		1,282,468
T. Rowe Price Dynamic Global Bond Fund, Class I		32,215		248,380
T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I		141,309		664,152
T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I		78,613		577,805
T. Rowe Price U.S. Treasury Money Fund, Inc., Class I		1,484,925		1,484,925
				4,257,730
TOTAL MUTUAL FUNDS (Cost $255,642,258)				284,767,016
TOTAL LONG-TERM INVESTMENTS (Cost $255,642,258)				284,767,016
TOTAL INVESTMENTS — 100.1% (Cost $255,642,258) (b)				284,767,016
Other Assets/(Liabilities) — (0.1)%				(143,918)
NET ASSETS — 100.0%			$	284,623,098

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

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

MassMutual Select T. Rowe Price Retirement 2065 Fund —  Portfolio of Investments

June 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 98.6%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		125,347	$	1,403,885
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		177,520		2,753,340
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		27,748		322,150
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		51,185		661,309
				5,140,684
Fixed Income Funds — 1.4%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		2,657		22,772
T. Rowe Price Dynamic Global Bond Fund, Class I		596		4,593
T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I		2,627		12,347
T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I		1,336		9,820
T. Rowe Price U.S. Treasury Money Fund, Inc., Class I		25,407		25,407
				74,939
TOTAL MUTUAL FUNDS (Cost $4,781,981)				5,215,623
TOTAL LONG-TERM INVESTMENTS (Cost $4,781,981)				5,215,623
TOTAL INVESTMENTS — 100.0% (Cost $4,781,981) (b)				5,215,623
Other Assets/(Liabilities) — (0.0)%				(1,340)
NET ASSETS — 100.0%			$	5,214,283

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer.

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

Notes to Portfolio of Investments (Unaudited)

1. The Funds

MassMutual Select Funds (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 May 28, 1993, as amended and restated as of November 21, 2011, as it may be further amended from time to time. The Trust consists of the following series (each individually referred to as a "Fund" or collectively as the "Funds"):

MassMutual Total Return Bond Fund ("Total Return Bond Fund")

MassMutual Strategic Bond Fund ("Strategic Bond Fund")

MassMutual Diversified Value Fund ("Diversified Value Fund")

MassMutual Fundamental Value Fund ("Fundamental Value Fund")

MM S&P 500^® Index Fund ("S&P 500 Index Fund")

MassMutual Equity Opportunities Fund ("Equity Opportunities Fund")

MassMutual Blue Chip Growth Fund ("Blue Chip Growth Fund")

MassMutual Growth Opportunities Fund ("Growth Opportunities Fund")

MassMutual Mid Cap Value Fund ("Mid Cap Value Fund")

MassMutual Small Cap Value Equity Fund ("Small Cap Value Equity Fund")

MassMutual Small Company Value Fund ("Small Company Value Fund")

MassMutual Mid Cap Growth Fund ("Mid Cap Growth Fund")

MassMutual Small Cap Growth Equity Fund ("Small Cap Growth Equity Fund")

MassMutual Overseas Fund ("Overseas Fund")

MassMutual Select T. Rowe Price International Equity Fund ("MM Select T. Rowe Price International Equity Fund")

MassMutual 20/80 Allocation Fund ("20/80 Allocation Fund")

MassMutual 40/60 Allocation Fund ("40/60 Allocation Fund")

MassMutual 60/40 Allocation Fund ("60/40 Allocation Fund")

MassMutual 80/20 Allocation Fund ("80/20 Allocation Fund")

MassMutual RetireSMART^SM by JPMorgan In Retirement Fund ("MM RetireSMART by JPMorgan In Retirement Fund")

MassMutual RetireSMART^SM by JPMorgan 2020 Fund ("MM RetireSMART by JPMorgan 2020 Fund")

Notes to Portfolio of Investments (Unaudited) (Continued)

MassMutual RetireSMART^SM by JPMorgan 2025 Fund ("MM RetireSMART by JPMorgan 2025 Fund")

MassMutual RetireSMART^SM by JPMorgan 2030 Fund ("MM RetireSMART by JPMorgan 2030 Fund")

MassMutual RetireSMART^SM by JPMorgan 2035 Fund ("MM RetireSMART by JPMorgan 2035 Fund")

MassMutual RetireSMART^SM by JPMorgan 2040 Fund ("MM RetireSMART by JPMorgan 2040 Fund")

MassMutual RetireSMART^SM by JPMorgan 2045 Fund ("MM RetireSMART by JPMorgan 2045 Fund")

MassMutual RetireSMART^SM by JPMorgan 2050 Fund ("MM RetireSMART by JPMorgan 2050 Fund")

MassMutual RetireSMART^SM by JPMorgan 2055 Fund ("MM RetireSMART by JPMorgan 2055 Fund")

MassMutual RetireSMART^SM by JPMorgan 2060 Fund ("MM RetireSMART by JPMorgan 2060 Fund")

MassMutual RetireSMART^SM by JPMorgan 2065 Fund ("MM RetireSMART by JPMorgan 2065 Fund")

MM Equity Asset Fund ("Equity Asset Fund")

MassMutual Select T. Rowe Price Bond Asset Fund ("MM Select T. Rowe Price Bond Asset Fund")

MassMutual Select T. Rowe Price Large Cap Blend Fund ("MM Select T. Rowe Price Large Cap Blend Fund")

MassMutual Select T. Rowe Price Real Assets Fund ("MM Select T. Rowe Price Real Assets Fund")

MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund ("MM Select T. Rowe Price Small and Mid Cap Blend Fund")

MassMutual Select T. Rowe Price Retirement Balanced Fund ("MM Select T. Rowe Price Retirement Balanced Fund")

MassMutual Select T. Rowe Price Retirement 2005 Fund ("MM Select T. Rowe Price Retirement 2005 Fund")

MassMutual Select T. Rowe Price Retirement 2010 Fund ("MM Select T. Rowe Price Retirement 2010 Fund")

MassMutual Select T. Rowe Price Retirement 2015 Fund ("MM Select T. Rowe Price Retirement 2015 Fund")

MassMutual Select T. Rowe Price Retirement 2020 Fund ("MM Select T. Rowe Price Retirement 2020 Fund")

Notes to Portfolio of Investments (Unaudited) (Continued)

MassMutual Select T. Rowe Price Retirement 2025 Fund ("MM Select T. Rowe Price Retirement 2025 Fund")

MassMutual Select T. Rowe Price Retirement 2030 Fund ("MM Select T. Rowe Price Retirement 2030 Fund")

MassMutual Select T. Rowe Price Retirement 2035 Fund ("MM Select T. Rowe Price Retirement 2035 Fund")

MassMutual Select T. Rowe Price Retirement 2040 Fund ("MM Select T. Rowe Price Retirement 2040 Fund")

MassMutual Select T. Rowe Price Retirement 2045 Fund ("MM Select T. Rowe Price Retirement 2045 Fund")

MassMutual Select T. Rowe Price Retirement 2050 Fund ("MM Select T. Rowe Price Retirement 2050 Fund")

MassMutual Select T. Rowe Price Retirement 2055 Fund ("MM Select T. Rowe Price Retirement 2055 Fund")

MassMutual Select T. Rowe Price Retirement 2060 Fund ("MM Select T. Rowe Price Retirement 2060 Fund")

MassMutual Select T. Rowe Price Retirement 2065 Fund ("MM Select T. Rowe Price Retirement 2065 Fund")

The 20/80 Allocation Fund, 40/60 Allocation Fund, 60/40 Allocation Fund, and 80/20 Allocation Fund (the "MM Target Allocation Funds") invest their investable assets in shares of MassMutual Funds advised by MML Investment Advisers, LLC ("MML Advisers") and non-affiliated mutual funds (together, the "MM Target Allocation Underlying Funds").

The MM RetireSMART by JPMorgan In Retirement Fund, MM RetireSMART by JPMorgan 2020 Fund, MM RetireSMART by JPMorgan 2025 Fund, MM RetireSMART by JPMorgan 2030 Fund, MM RetireSMART by JPMorgan 2035 Fund, MM RetireSMART by JPMorgan 2040 Fund, MM RetireSMART by JPMorgan 2045 Fund, MM RetireSMART by JPMorgan 2050 Fund, MM RetireSMART by JPMorgan 2055 Fund, MM RetireSMART by JPMorgan 2060 Fund, and MM RetireSMART by JPMorgan 2065 Fund (the "MM RetireSMART by JPMorgan Funds") invest their investable assets in shares of MassMutual Funds, J.P. Morgan Funds advised by J.P. Morgan Investment Management Inc. ("J.P. Morgan") or its affiliates, and non-affiliated mutual funds (together, the "MM RetireSMART by JPMorgan Underlying Funds").

The MM Select T. Rowe Price Retirement Balanced Fund, MM Select T. Rowe Price Retirement 2005 Fund, MM Select T. Rowe Price Retirement 2010 Fund, MM Select T. Rowe Price Retirement 2015 Fund, MM Select T. Rowe Price Retirement 2020 Fund, MM Select T. Rowe Price Retirement 2025 Fund, MM Select T. Rowe Price Retirement 2030 Fund, MM Select T. Rowe Price Retirement 2035 Fund, MM Select T. Rowe Price Retirement 2040 Fund, MM Select T. Rowe Price Retirement 2045 Fund, MM Select T. Rowe Price Retirement 2050 Fund, MM Select T. Rowe Price Retirement 2055 Fund, MM Select T. Rowe Price Retirement 2060 Fund, and MM Select T. Rowe Price Retirement 2065 Fund (the "MM Select T. Rowe Price Retirement Funds") invest their investable assets in shares of MassMutual Funds and T. Rowe Price Funds (together, the "MM Select T. Rowe Price Underlying Funds"). The MM Target Allocation Underlying Funds, MM RetireSMART by JPMorgan Underlying Funds, and MM Select T. Rowe Price Underlying Funds are hereinafter collectively referred to as the ("Underlying Funds").

Notes to Portfolio of Investments (Unaudited) (Continued)

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; instead, MML Advisers will determine the fair value of a Fund's securities in accordance with MML Advisers' fair valuation policy and procedures. 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 or an Underlying Fund holds foreign securities that trade on days that foreign securities markets are open.

The net asset value of each of the MM Target Allocation Funds, MM RetireSMART by JPMorgan Funds, and MM Select T. Rowe Price Retirement Funds is based upon the net asset value(s) of its corresponding Underlying Funds. Shares of the Underlying Funds are valued at their closing net asset values as reported on each business day.

The Prospectuses and Statements of Additional Information ("SAIs") for the Underlying Funds explain the valuation methods for the Underlying Funds, including the circumstances under which the Underlying Funds may use fair value pricing and the effects of doing so. Such Prospectuses and SAIs are available on the Securities and Exchange Commission's ("SEC") EDGAR database on its website at http://www.sec.gov.

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.

The Board of Trustees ("Trustees") have designated MML Advisers as the Funds' "valuation designee," responsible for determining the fair value, in good faith, of securities and other instruments held by the Funds for which market quotations are not readily available or for which such market quotations or values are considered by MML Advisers or a 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). It is possible that a significant amount of a Fund's assets will be subject to fair valuation in accordance with MML Advisers' fair valuation policy and procedures. The fair value determined for an investment by MML Advisers may differ from recent market prices for the investment and may be significantly different from the value realized upon the sale of such investment.

Notes to Portfolio of Investments (Unaudited) (Continued)

The Funds and certain Underlying 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.

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 may be fair valued using alternate valuation approaches including the following:

Market approach: considers factors including the price of recent investments in the same or similar security or financial metrics of comparable securities.

Income approach: considers factors including expected future cash flows, security specific risks, and corresponding discount rates.

Cost approach: considers factors including the value of the security's underlying assets and liabilities.

Investments in series of preferred stock issued by Private Companies are typically valued utilizing the 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 MM Target Allocation Funds, MM RetireSMART by JPMorgan Funds, and the MM Select T. Rowe Price Retirement Funds characterized all investments at Level 1, as of June 30, 2024. For each Fund noted in the preceding sentences, 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 June 30, 2024, for remaining Funds' investments:

Total Return Bond Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Bank Loans	$	—		$	9,166,185		$	—	$	9,166,185
Corporate Debt		—			126,721,152			—		126,721,152
Municipal Obligations		—			4,550,330			—		4,550,330
Non-U.S. Government Agency Obligations		—			125,312,013			—		125,312,013
Sovereign Debt Obligations		—			3,674,147			—		3,674,147
U.S. Government Agency Obligations and Instrumentalities		—			267,847,252			—		267,847,252
U.S. Treasury Obligations		—			195,545,432			—		195,545,432
Common Stock		617,069			—			—		617,069
Short-Term Investments		43,381,450			144,112,363			—		187,493,813
Total Investments	$	43,998,519		$	876,928,874		$	—	$	920,927,393
Asset Derivatives
Forward Contracts	$	—		$	226,139		$	—	$	226,139
Futures Contracts		759,398			—			—		759,398
Swap Agreements		—			202,006			—		202,006
Total	$	759,398		$	428,145		$	—	$	1,187,543
Liability Derivatives
Forward Contracts	$	—		$	(8,342	)	$	—	$	(8,342	)
Futures Contracts		(180,407	)		—			—		(180,407	)
Total	$	(180,407	)	$	(8,342	)	$	—	$	(188,749	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Strategic Bond Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Bank Loans	$	—		$	5,864,536		$	—	$	5,864,536
Corporate Debt		—			91,833,051			—		91,833,051
Non-U.S. Government Agency Obligations		—			29,648,045			—		29,648,045
Sovereign Debt Obligations		—			11,517,729			—		11,517,729
U.S. Government Agency Obligations and Instrumentalities		—			145,920,307			—		145,920,307
U.S. Treasury Obligations		—			94,836,031			—		94,836,031
Purchased Options		54,963			92,535			—		147,498
Short-Term Investments		2,455,915			7,823,329			—		10,279,244
Total Investments	$	2,510,878		$	387,535,563		$	—	$	390,046,441
Liability Investments
U.S. Government Agency Obligations and Instrumentalities	$	—		$	(1,041,572	)	$	—	$	(1,041,572	)
Asset Derivatives
Forward Contracts	$	—		$	521,203		$	—	$	521,203
Futures Contracts		1,845,135			—			—		1,845,135
Swap Agreements		—			1,296,830			—		1,296,830
Total	$	1,845,135		$	1,818,033		$	—	$	3,663,168
Liability Derivatives
Forward Contracts	$	—		$	(558,149	)	$	—	$	(558,149	)
Futures Contracts		(270,489	)		—			—		(270,489	)
Swap Agreements		—			(874,754	)		—		(874,754	)
Written Options		(83,729	)		(33,533	)		—		(117,262	)
Total	$	(354,218	)	$	(1,466,436	)	$	—	$	(1,820,654	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Diversified Value Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock	$	194,875,228	$	—	$	—	$	194,875,228
Exchange-Traded Funds		2,913,649		—		—		2,913,649
Short-Term Investments		35,042		1,078,840		—		1,113,882
Total Investments	$	197,823,919	$	1,078,840	$	—	$	198,902,759

Notes to Portfolio of Investments (Unaudited) (Continued)

Fundamental Value Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock	$	444,240,991	$	—	$	—	$	444,240,991
Short-Term Investments		5,652,064		2,139,510		—		7,791,574
Total Investments	$	449,893,055	$	2,139,510	$	—	$	452,032,565

Notes to Portfolio of Investments (Unaudited) (Continued)

S&P 500 Index Fund

Asset Investments	Level 1			Level 2		Level 3		Total
Common Stock	$	2,296,063,669		$	—	$	—	$	2,296,063,669
Short-Term Investments		—			8,323,135		—		8,323,135
Total Investments	$	2,296,063,669		$	8,323,135	$	—	$	2,304,386,804
Liability Derivatives
Futures Contracts	$	(40,177	)	$	—	$	—	$	(40,177	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Equity Opportunities Fund

Asset Investments	Level 1		Level 2			Level 3		Total
Common Stock	$	607,961,793	$	11,451,383	*	$	—	$	619,413,176
Preferred Stock		—		2,691,641	*		—		2,691,641
Short-Term Investments		8,284,185		21,061,195			—		29,345,380
Total Investments	$	616,245,978	$	35,204,219		$	—	$	651,450,197

Notes to Portfolio of Investments (Unaudited) (Continued)

Blue Chip Growth Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock	$	2,558,452,497	$	2,570,626	$	3,160,754	$	2,564,183,877
Preferred Stock		—		—		4,001,007		4,001,007
Corporate Debt		—		3,847,975		—		3,847,975
Short-Term Investments		2,560		40,386,359		—		40,388,919
Total Investments	$	2,558,455,057	$	46,804,960	$	7,161,761	$	2,612,421,778

Notes to Portfolio of Investments (Unaudited) (Continued)

Growth Opportunities Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock	$	131,299,322	$	—	$	—	$	131,299,322
Short-Term Investments		2,272,596		1,537,190		—		3,809,786
Total Investments	$	133,571,918	$	1,537,190	$	—	$	135,109,108

Notes to Portfolio of Investments (Unaudited) (Continued)

Mid Cap Value Fund

Asset Investments	Level 1		Level 2			Level 3		Total
Common Stock	$	63,340,338	$	1,601,867	*	$	—	$	64,942,205
Preferred Stock		—		173,059	*		—		173,059
Short-Term Investments		19,080		1,418,988			—		1,438,068
Total Investments	$	63,359,418	$	3,193,914		$	—	$	66,553,332
Asset Derivatives
Forward Contracts	$	—	$	5,675		$	—	$	5,675
Liability Derivatives
Forward Contracts	$	—	$	(50	)	$	—	$	(50	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Small Cap Value Equity Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock	$	40,338,372	$	—	$	—	$	40,338,372
Short-Term Investments		520,758		1,014,481		—		1,535,239
Total Investments	$	40,859,130	$	1,014,481	$	—	$	41,873,611

Notes to Portfolio of Investments (Unaudited) (Continued)

Small Company Value Fund

Asset Investments	Level 1		Level 2			Level 3		Total
Common Stock	$	122,979,569	$	221,556	*	$	—	$	123,201,125
Short-Term Investments		1,053,009		1,529,149			—		2,582,158
Total Investments	$	124,032,578	$	1,750,705		$	—	$	125,783,283
Asset Derivatives
Forward Contracts	$	—	$	1,894		$	—	$	1,894
Liability Derivatives
Forward Contracts	$	—	$	(20	)	$	—	$	(20	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Mid Cap Growth Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock	$	4,807,328,351	$	—	$	—	$	4,807,328,351
Preferred Stock		—		—		13,798,303		13,798,303
Short-Term Investments		11,609,391		156,806,774		—		168,416,165
Total Investments	$	4,818,937,742	$	156,806,774	$	13,798,303	$	4,989,542,819

Notes to Portfolio of Investments (Unaudited) (Continued)

Small Cap Growth Equity Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock	$	719,163,246	$	—	$	—	$	719,163,246
Exchange-Traded Funds		3,164,475		—		—		3,164,475
Short-Term Investments		2,047,705		11,862,393		—		13,910,098
Total Investments	$	724,375,426	$	11,862,393	$	—	$	736,237,819

Notes to Portfolio of Investments (Unaudited) (Continued)

Overseas Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock*
Australia	$	—	$	6,682,866	$	—	$	6,682,866
Belgium		1,399,176		3,723,762		—		5,122,938
Canada		14,679,205		—		—		14,679,205
China		935,192		13,124,430		—		14,059,622
Denmark		—		15,455,623		—		15,455,623
France		—		71,818,820		—		71,818,820
Germany		—		67,090,892		—		67,090,892
Hong Kong		—		10,500,098		—		10,500,098
India		—		7,020,465		—		7,020,465
Indonesia		—		833,253		—		833,253
Ireland		—		3,547,264		—		3,547,264
Israel		3,048,870		—		—		3,048,870
Italy		6,692,739		12,253,447		—		18,946,186
Japan		—		53,259,343		—		53,259,343
Luxembourg		—		1,948,896		—		1,948,896
Netherlands		—		14,513,554		—		14,513,554
Portugal		—		2,818,551		—		2,818,551
Republic of Korea		—		5,989,309		—		5,989,309
Singapore		—		4,141,009		—		4,141,009
Spain		—		5,373,895		—		5,373,895
Sweden		—		4,655,733		—		4,655,733
Switzerland		—		36,400,370		—		36,400,370
Taiwan		5,858,961		—		—		5,858,961
United Kingdom		—		46,734,544		—		46,734,544
United States		9,008,858		37,817,560		—		46,826,418
Preferred Stock*
Republic of Korea		—		2,539,501		—		2,539,501
Short-Term Investments		—		4,649,272		—		4,649,272
Total Investments	$	41,623,001	$	432,892,457	$	—	$	474,515,458

Notes to Portfolio of Investments (Unaudited) (Continued)

MM Select T. Rowe Price International Equity Fund
Asset Investments	Level 1		Level 2		Level 3			Total
Common Stock*
Argentina	$	396,699	$	—	$	—		$	396,699
Australia		—		25,941,184		—			25,941,184
Austria		—		8,153,602		—			8,153,602
Belgium		—		2,602,224		—			2,602,224
Brazil		28,578,843		—		—			28,578,843
Canada		58,698,995		—		—			58,698,995
Chile		2,188,314		2,887,899		—			5,076,213
China		32,781,247		75,497,372		—			108,278,619
Denmark		8,490,603		10,197,190		—			18,687,793
Finland		—		7,368,941		—			7,368,941
France		—		91,352,497		—			91,352,497
Germany		—		91,452,827		—			91,452,827
Guatemala		—		1,783,533		—			1,783,533
Hong Kong		—		17,212,655		—			17,212,655
Hungary		—		5,583,403		—			5,583,403
India		1,745,656		64,407,288		—			66,152,944
Indonesia		—		11,969,750		—			11,969,750
Ireland		2,169,044		—		—			2,169,044
Italy		1,235,267		26,331,438		—			27,566,705
Japan		—		197,773,159		—			197,773,159
Luxembourg		3,097,311		1,638,626		—			4,735,937
Macau		—		3,367,731		—			3,367,731
Malaysia		—		3,826,354		—			3,826,354
Mexico		8,733,137		—		—			8,733,137
Netherlands		3,580,943		66,110,829		—			69,691,772
Norway		2,254,326		11,408,268		—			13,662,594
Peru		548,845		—		—			548,845
Philippines		—		3,630,340		—			3,630,340
Poland		—		1,911,791		—			1,911,791
Portugal		—		12,644,040		—			12,644,040
Republic of Korea		2,847,386		56,166,390		—			59,013,776
Russia		—		—		—	+		—
Saudi Arabia		—		13,658,631		—			13,658,631
Singapore		1,585,024		8,299,299		—			9,884,323
South Africa		—		6,599,927		—			6,599,927
Spain		1,277,258		5,714,942		—			6,992,200
Sweden		—		26,095,631		—			26,095,631
Switzerland		—		41,846,919		—			41,846,919
Taiwan		—		74,945,889		—			74,945,889
Thailand		561,341		5,832,880		—			6,394,221
United Arab Emirates		—		1,042,784		—			1,042,784
United Kingdom		23,887,635		106,267,271		—			130,154,906
United States		25,790,312		58,369,828		408,531			84,568,671
Preferred Stock*
Brazil		1,328,113		—		—			1,328,113
Germany		—		5,525,834		—			5,525,834
United States		—		—		24,533			24,533
Warrants		—		—		—	+		—
Rights		3,594		—		—	+		3,594
Short-Term Investments		32,257,122		1,318,481		—			33,575,603
Total Investments	$	244,037,015	$	1,156,737,647	$	433,064		$	1,401,207,726

Notes to Portfolio of Investments (Unaudited) (Continued)

Equity Asset Fund
Asset Investments	Level 1		Level 2			Level 3			Total
Common Stock	$	321,744,998	$	2,223	*	$	—		$	321,747,221
Rights		—		—			—	+		—
Short-Term Investments		—		1,891,240			—			1,891,240
Total Investments	$	321,744,998	$	1,893,463		$	—		$	323,638,461
Asset Derivatives
Futures Contracts	$	6,498	$	—		$	—		$	6,498

Notes to Portfolio of Investments (Unaudited) (Continued)

MM Select T. Rowe Price Bond Asset Fund
Asset Investments	Level 1			Level 2			Level 3		Total
Bank Loans	$	—		$	7,896,524		$	—	$	7,896,524
Corporate Debt		—			144,930,861			—		144,930,861
Municipal Obligations		—			603,105			—		603,105
Non-U.S. Government Agency Obligations		—			43,473,062			—		43,473,062
Sovereign Debt Obligations		—			100,172,949			—		100,172,949
U.S. Government Agency Obligations and Instrumentalities		—			117,750,978			—		117,750,978
U.S. Treasury Obligations		—			122,083,655			—		122,083,655
Purchased Options		—			242,159			—		242,159
Short-Term Investments		10,289,120			8,654,098			—		18,943,218
Total Investments	$	10,289,120		$	545,807,391		$	—	$	556,096,511
Asset Derivatives
Forward Contracts	$	—		$	3,819,881		$	—	$	3,819,881
Futures Contracts		355,128			—			—		355,128
Swap Agreements		—			1,156,624			—		1,156,624
Total	$	355,128		$	4,976,505		$	—	$	5,331,633
Liability Derivatives
Forward Contracts	$	—		$	(1,184,125	)	$	—	$	(1,184,125	)
Futures Contracts		(447,392	)		—			—		(447,392	)
Swap Agreements		—			(559,491	)		—		(559,491	)
Written Options		—			(40,902	)		—		(40,902	)
Total	$	(447,392	)	$	(1,784,518	)	$	—	$	(2,231,910	)

Notes to Portfolio of Investments (Unaudited) (Continued)

MM Select T. Rowe Price Large Cap Blend Fund
Asset Investments	Level 1		Level 2			Level 3		Total
Common Stock	$	2,620,100,739	$	18,223,727	*	$	3,778,095	$	2,642,102,561
Preferred Stock		—		2,609,476	*		4,488,209		7,097,685
Short-Term Investments		59,412		48,925			—		108,337
Total Investments	$	2,620,160,151	$	20,882,128		$	8,266,304	$	2,649,308,583
Asset Derivatives
Futures Contracts	$	3,113	$	—		$	—	$	3,113

Notes to Portfolio of Investments (Unaudited) (Continued)

MM Select T. Rowe Price Real Assets Fund
Asset Investments	Level 1			Level 2			Level 3			Total
Common Stock*
Australia	$	106,590		$	26,172,898		$	—		$	26,279,488
Austria		—			682,202			—			682,202
Bahrain		—			446,021			—			446,021
Belgium		—			1,670,354			—			1,670,354
Bosnia and Herzegowina		—			503,692			—			503,692
Brazil		7,250,177			—			—			7,250,177
Canada		33,742,216			—			—			33,742,216
Chile		—			491,596			—			491,596
China		—			1,658,139			—			1,658,139
Egypt		—			498,187			—			498,187
France		—			4,989,967			—			4,989,967
Germany		—			1,602,560			—			1,602,560
Ghana		593,888			—			—			593,888
Hong Kong		—			1,831,703			—			1,831,703
India		—			1,941,755			—			1,941,755
Japan		—			9,172,970			—			9,172,970
Kazakhstan		—			896,076			—			896,076
Luxembourg		—			748,696			—			748,696
Mexico		2,338,382			—			—			2,338,382
Norway		539,514			1,491,469			—			2,030,983
Portugal		—			1,239,868			—			1,239,868
Republic of Korea		—			875,629			—			875,629
Russia		—			—			—	+		—
Singapore		—			1,525,624			—			1,525,624
South Africa		—			8,721,272			—			8,721,272
Spain		—			220,787			—			220,787
Sweden		—			534,034			—			534,034
Taiwan		—			268,669			—			268,669
United Kingdom		1,742,553			5,208,393			—			6,950,946
United States		183,223,577			5,146,442			—			188,370,019
Vietnam		—			2,318,289			—			2,318,289
Zambia		650,679			—			—			650,679
Preferred Stock
United States		—			—			2,433,061			2,433,061
Exchange-Traded Funds		7,770,103			—			—			7,770,103
Mutual Funds		239,132			—			—			239,132
Short-Term Investments		10,502,275			3,091,517			—			13,593,792
Total Investments	$	248,699,086		$	83,948,809		$	2,433,061		$	335,080,956
Asset Derivatives
Forward Contracts	$	—		$	256,941		$	—		$	256,941
Futures Contracts		264,886			—			—			264,886
Swap Agreements		—			22,561			—			22,561
Total	$	264,886		$	279,502		$	—		$	544,388
Liability Derivatives
Forward Contracts	$	—		$	(307,130	)	$	—		$	(307,130	)
Futures Contracts		(133,697	)		—			—			(133,697	)
Swap Agreements		—			(234,845	)		—			(234,845	)
Total	$	(133,697	)	$	(541,975	)	$	—		$	(675,672	)

Notes to Portfolio of Investments (Unaudited) (Continued)

MM Select T. Rowe Price Small and Mid Cap Blend Fund
Asset Investments	Level 1		Level 2			Level 3			Total
Common Stock	$	615,450,095	$	8,643,552	*	$	1,223,172		$	625,316,819
Preferred Stock		—		554,285	*		8,210,456			8,764,741
Corporate Debt		—		974,646			—			974,646
Rights		—		—			—	+		—
Warrants		215		—			8,448			8,663
Short-Term Investments		16,012,022		1,433,662			—			17,445,684
Total Investments	$	631,462,332	$	11,606,145		$	9,442,076		$	652,510,553

* 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.

+ Represents a security at $0 value as of June 30, 2024.

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/Semi-annual reports and Prospectus(es) and Statement(s) of Additional Information which can be found on the SEC'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, other than the MM Target Allocation Funds, MM RetireSMART by JPMorgan Funds, and MM Select T. Rowe Price Retirement Funds 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 June 30, 2024, 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.

Notes to Portfolio of Investments (Unaudited) (Continued)

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.

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 MM Select T. Rowe Price Real Assets Fund invests a significant amount of its assets in foreign securities and each of the Overseas Fund and MM Select T. Rowe Price International Equity Fund invests substantially all of its assets in foreign securities. The other Funds and certain Underlying Funds may also invest in foreign securities. Foreign securities, including American Depositary Receipts, are subject to additional risks compared to securities of U.S. issuers, including international trade, currency, political, regulatory, public health, and diplomatic risks. In addition, fluctuations in currency exchange rates may favorably or unfavorably 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, less stringent investor protection and disclosure standards, less reliable settlement practices, greater price volatility, higher relative rates of inflation, greater political, economic, and social instability, greater custody and operational risks, greater risk of new or inconsistent government treatment of or restrictions on issuers and instruments, and greater volatility in currency exchange rates, and are more susceptible to environmental problems.

Notes to Portfolio of Investments (Unaudited) (Continued)

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 U.S. 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 U.S. federal income tax.

Dividends and Distributions to Shareholders 

Dividends from net investment income are either declared daily and paid monthly or declared and paid annually depending on the requirements of each Fund. Dividends from net investment income may also be distributed at other times throughout the year as required to satisfy tax or regulatory requirements. 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 June 30, 2024, 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 U.S. federal income tax basis, were as follows: 

		Federal Income Tax Cost		Tax Basis Unrealized Appreciation		Tax Basis Unrealized (Depreciation)			Net Unrealized Appreciation (Depreciation)
Total Return Bond Fund	$	944,721,792	$	4,490,542	$	(28,284,941	)	$	(23,794,399	)
Strategic Bond Fund		412,244,313		1,289,843		(23,487,715	)		(22,197,872	)
Diversified Value Fund		165,914,545		35,570,984		(2,582,770	)		32,988,214
Fundamental Value Fund		355,829,258		104,869,781		(8,666,474	)		96,203,307
S&P 500 Index Fund		1,118,162,518		1,242,393,481		(56,169,195	)		1,186,224,286
Equity Opportunities Fund		523,706,265		137,538,692		(9,794,760	)		127,743,932
Blue Chip Growth Fund		1,423,321,321		1,261,750,605		(72,650,148	)		1,189,100,457
Growth Opportunities Fund		93,171,826		44,434,409		(2,497,127	)		41,937,282
Mid Cap Value Fund		65,043,344		5,485,609		(3,975,621	)		1,509,988
Small Cap Value Equity Fund		38,037,788		6,368,395		(2,532,572	)		3,835,823
Small Company Value Fund		123,031,238		13,496,130		(10,744,085	)		2,752,045
Mid Cap Growth Fund		4,028,551,657		1,189,666,983		(228,675,821	)		960,991,162
Small Cap Growth Equity Fund		612,197,225		160,123,015		(36,082,421	)		124,040,594
Overseas Fund		407,999,302		99,214,857		(32,698,701	)		66,516,156
MM Select T. Rowe Price International Equity Fund		1,219,950,678		264,465,807		(83,208,759	)		181,257,048
20/80 Allocation Fund		190,948,281		2,599,972		(15,526,048	)		(12,926,076	)
40/60 Allocation Fund		188,013,272		4,652,877		(13,593,822	)		(8,940,945	)
60/40 Allocation Fund		158,410,350		7,647,861		(6,271,757	)		1,376,104
80/20 Allocation Fund		118,614,338		8,181,848		(1,698,905	)		6,482,943
MM RetireSMART by JPMorgan In Retirement Fund		66,404,120		2,411,273		(1,714,372	)		696,901
MM RetireSMART by JPMorgan 2020 Fund		106,717,090		3,920,280		(2,786,149	)		1,134,131
MM RetireSMART by JPMorgan 2025 Fund		125,551,731		4,983,714		(4,069,436	)		914,278
MM RetireSMART by JPMorgan 2030 Fund		245,445,118		13,347,762		(4,707,394	)		8,640,368
MM RetireSMART by JPMorgan 2035 Fund		148,166,465		8,698,200		(2,600,039	)		6,098,161
MM RetireSMART by JPMorgan 2040 Fund		183,619,670		15,435,363		(1,520,166	)		13,915,197
MM RetireSMART by JPMorgan 2045 Fund		111,897,213		9,320,879		(733,617	)		8,587,262
MM RetireSMART by JPMorgan 2050 Fund		138,049,941		14,409,587		(479,053	)		13,930,534
MM RetireSMART by JPMorgan 2055 Fund		62,363,740		5,846,703		(236,635	)		5,610,068
MM RetireSMART by JPMorgan 2060 Fund		23,986,187		2,468,918		(66,095	)		2,402,823
MM RetireSMART by JPMorgan 2065 Fund		1,078,250		95,921		(2,446	)		93,475
Equity Asset Fund		223,313,813		106,348,920		(6,024,272	)		100,324,648
MM Select T. Rowe Price Bond Asset Fund		581,296,053		3,017,203		(28,216,745	)		(25,199,542	)
MM Select T. Rowe Price Large Cap Blend Fund		2,167,029,228		524,958,113		(42,678,758	)		482,279,355
MM Select T. Rowe Price Real Assets Fund		324,519,563		24,890,654		(14,329,261	)		10,561,393
MM Select T. Rowe Price Small and Mid Cap Blend Fund		572,903,611		115,900,456		(36,293,514	)		79,606,942
MM Select T. Rowe Price Retirement Balanced Fund		213,659,231		9,104,604		(7,338,675	)		1,765,929
MM Select T. Rowe Price Retirement 2005 Fund		17,304,607		1,023,810		(208,522	)		815,288
MM Select T. Rowe Price Retirement 2010 Fund		94,298,823		4,835,623		(3,585,612	)		1,250,011
MM Select T. Rowe Price Retirement 2015 Fund		101,188,786		5,361,177		(3,564,359	)		1,796,818
MM Select T. Rowe Price Retirement 2020 Fund		413,713,115		23,350,459		(14,494,854	)		8,855,605
MM Select T. Rowe Price Retirement 2025 Fund		432,391,648		24,955,461		(11,724,228	)		13,231,233
MM Select T. Rowe Price Retirement 2030 Fund		1,162,353,445		68,613,106		(26,726,333	)		41,886,773
MM Select T. Rowe Price Retirement 2035 Fund		651,032,131		38,929,598		(8,203,244	)		30,726,354
MM Select T. Rowe Price Retirement 2040 Fund		1,081,215,671		74,668,590		(5,390,346	)		69,278,244
MM Select T. Rowe Price Retirement 2045 Fund		525,951,214		38,212,377		(2,243,923	)		35,968,454
MM Select T. Rowe Price Retirement 2050 Fund		833,025,756		63,671,882		(606,535	)		63,065,347
MM Select T. Rowe Price Retirement 2055 Fund		321,303,825		31,504,377		(251,239	)		31,253,138
MM Select T. Rowe Price Retirement 2060 Fund		255,642,258		29,190,097		(65,339	)		29,124,758
MM Select T. Rowe Price Retirement 2065 Fund		4,781,981		433,730		(88	)		433,642

Notes to Portfolio of Investments (Unaudited) (Continued)

4. New Accounting Pronouncements

In December 2022, FASB issued Accounting Standards Update 2022-06, "Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848" ("ASU 2022-06"). ASU 2022-06 is an update of ASU 2020-04, which responded to concerns about structural risks of interbank offered rates, and particularly the risk of cessation of LIBOR. ASU 2020-04 provides optional guidance for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. ASU 2020-04 is elective and applies to all entities, subject to meeting certain criteria, that have contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. ASU 2022-06 defers the sunset date provision included in Topic 848. The amendments in this update are effective immediately through December 31, 2024, for all entities. Management does not expect ASU 2022-06 to have a material impact on the financial statements.

5. 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 or Underlying 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, other countries, and certain international organizations. 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 or an Underlying Fund's investments, even beyond any direct exposure the Fund or the Underlying Fund may have to Russian issuers or the adjoining geographic regions. These sanctions and any other intergovernmental actions (including retaliatory actions by the Russian government) 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 or an Underlying 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 or an Underlying Fund to sell other portfolio holdings at a disadvantageous time or price in order to meet shareholder redemptions.