MassMutual Total Return Bond Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 109.8%
BANK LOANS — 2.4%
Aerospace & Defense — 0.0%
TransDigm, Inc., 2020 Term Loan E, 1 mo. USD LIBOR + 2.250%
2.354% VRN 5/30/25	$	292,025	$	287,776
Airlines — 0.0%
American Airlines, Inc., 2017 1st Lien Term Loan, 1 mo. USD LIBOR + 1.750%
1.852% VRN 1/29/27		87,750		82,397
Auto Parts & Equipment — 0.0%
Clarios Global LP, 2021 USD Term Loan B, 1 mo. USD LIBOR + 3.250%
3.354% VRN 4/30/26		211,302		209,876
Chemicals — 0.0%
Zep, Inc., 2017 1st Lien Term Loan, 3 mo. USD LIBOR + 4.000%
5.000% VRN 8/12/24		259,801		252,656
Commercial Services — 0.0%
Spin Holdco, Inc., 2021 Term Loan, 3 mo. USD LIBOR + 4.000%
4.750% VRN 3/04/28		199,000		199,470
Diversified Financial Services — 0.6%
Avolon TLB Borrower 1 (US) LLC, Term Loan B3, 1 mo. USD LIBOR + 1.750%
2.500% VRN 1/15/25		70,325		70,267
Setanta Aircraft Leasing Designated Activity Company, Term Loan B, 3 mo. USD LIBOR + 2.000%
2.140% VRN 11/05/28		4,750,000		4,744,062
				4,814,329

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

	Principal Amount		Value
Entertainment — 0.0%
Churchill Downs, Inc., 2017 Term Loan B, 1 mo. USD LIBOR + 2.000%
2.104% VRN 12/27/24	$	96,482	$	96,000
Penn National Gaming, Inc., 2018 1st Lien Term Loan B, 1 mo. USD LIBOR + 2.250%
3.000% VRN 10/15/25		151,921		151,683
				247,683
Environmental Controls — 0.0%
Clean Harbors, Inc., 2017 Term Loan B, 1 mo. USD LIBOR + 1.750%
1.854% VRN 6/28/24		96,717		96,665
GFL Environmental, Inc., 2020 Term Loan, 1 mo. USD LIBOR + 3.000%
3.500% VRN 5/30/25		158,707		159,047
				255,712
Food — 0.1%
Hostess Brands LLC, 2019 Term Loan, 3 mo. USD LIBOR + 2.250%
3.000% VRN 8/03/25		318,484		317,258
Health Care – Products — 0.1%
Avantor Funding, Inc., 2021 Term Loan B5, 1 mo. USD LIBOR + 2.250%
2.750% VRN 11/08/27		669,946		669,108
Health Care – Services — 0.1%
ICON Luxembourg S.A.R.L.
LUX Term Loan, 3 mo. USD LIBOR + 2.250%
2.750% VRN 7/03/28		333,943		333,803
US Term Loan, 3 mo. USD LIBOR + 2.250%
2.750% VRN 7/03/28		83,202		83,167
IQVIA, Inc., 2017 USD Term Loan B2, 1 mo. USD LIBOR + 1.750%
1.854% VRN 1/17/25		148,567		147,918
				564,888
Insurance — 0.1%
AmWINS Group, Inc., 2021 Term Loan B, 1 mo. USD LIBOR + 2.250%
3.000% VRN 2/19/28		965,253		957,212
Lodging — 0.0%
Caesars Resort Collection LLC, 2017 1st Lien Term Loan B, 1 mo. USD LIBOR + 2.750%
2.851% VRN 12/23/24		1,250		1,242

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

	Principal Amount		Value
Media — 0.1%
Charter Communications Operating LLC, 2019 Term Loan B2, 1 mo. USD LIBOR + 1.750%
1.860% VRN 2/01/27	$	97,995	$	96,999
CSC Holdings LLC, 2017 Term Loan B1, 3 mo. USD LIBOR + 2.250%
2.360% VRN 7/17/25		173,187		170,372
Diamond Sports Group LLC, Term Loan, 1 mo. USD LIBOR + 3.250%
3.353% VRN 8/24/26		173,668		80,031
DIRECTV Financing LLC, Term Loan, 3 mo. USD LIBOR + 5.000%
5.750% VRN 8/02/27		439,875		440,003
Sinclair Television Group, Inc., 2021 Term Loan B3, 1 mo. USD LIBOR + 3.000%
3.110% VRN 4/01/28		398,000		390,040
				1,177,445
Packaging & Containers — 0.1%
Berry Global, Inc., 2021 Term Loan Z, 2 mo. USD LIBOR + 1.750%
1.864% VRN 7/01/26		985,634		978,488
Pharmaceuticals — 0.5%
Change Healthcare Holdings LLC, 2017 Term Loan B, 1 mo. USD LIBOR + 2.500%
3.500% FRN 3/01/24		255,307		255,016
Elanco Animal Health, Inc., Term Loan B, 3 mo. USD LIBOR + 1.750%
1.849% VRN 8/01/27		1,035,654		1,021,093
Endo Luxembourg Finance Company I S.a r.l., 2021 Term Loan, 3 mo. USD LIBOR + 5.000%
5.750% VRN 3/27/28		498,744		484,031
Grifols Worldwide Operations USA, Inc., USD 2019 Term Loan B, 1 mo. USD LIBOR + 2.000%
2.104% VRN 11/15/27		723,383		712,532
Horizon Therapeutics USA, Inc., 2021 Term Loan B2, 1 mo. USD LIBOR + 1.750%
2.250% VRN 3/15/28		820,875		817,353
Jazz Financing Lux S.a.r.l., USD Term Loan, 1 mo. USD LIBOR + 3.500%
4.000% VRN 5/05/28		412,925		414,242
Organon & Co, USD Term Loan, 3 mo. USD LIBOR + 3.000%
3.500% VRN 6/02/28		723,125		723,277
				4,427,544

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

	Principal Amount		Value
Retail — 0.1%
1011778 B.C. Unlimited Liability Co., Term Loan B4, 1 mo. USD LIBOR + 1.750%
1.854% VRN 11/19/26	$	369,769	$	364,222
Telecommunications — 0.6%
CenturyLink, Inc.
2020 Term Loan A, 1 mo. USD LIBOR + 2.000%
2.104% VRN 1/31/25		225,000		223,594
2020 Term Loan B, 1 mo. USD LIBOR + 2.250%
2.354% VRN 3/15/27		639,970		632,149
CommScope, Inc., 2019 Term Loan B, 1 mo. USD LIBOR + 3.250%
3.354% VRN 4/06/26		293,250		289,156
Intelsat Jackson Holdings S.A.
2021 DIP Term Loan, 3 mo. USD LIBOR + 4.750%
5.750% VRN 10/13/22 (a)		640,000		639,002
2017 Term Loan B5, 1 mo. USD LIBOR + 8.625%,
8.625% VRN 1/02/24		250,000		249,492
Level 3 Financing, Inc., 2019 Term Loan B, 1 mo. USD LIBOR + 1.750%
1.854% VRN 3/01/27		1,460,000		1,439,925
SBA Senior Finance II LLC, 2018 Term Loan B, 1 mo. USD LIBOR + 1.750%
1.852% VRN 4/11/25		482,500		476,773
Telenet Financing USD LLC, 2020 USD Term Loan AR, 3 mo. USD LIBOR + 2.000%
2.110% VRN 4/30/28		300,000		294,375
Zayo Group Holdings, Inc., USD Term Loan, 1 mo. USD LIBOR + 3.000%
3.104% VRN 3/09/27		962,204		948,570
				5,193,036
TOTAL BANK LOANS (Cost $20,937,872)				21,000,342
CORPORATE DEBT — 24.9%
Aerospace & Defense — 0.2%
The Boeing Co.
1.167% 2/04/23		1,855,000		1,855,232
Agriculture — 0.5%
BAT Capital Corp.
4.390% 8/15/37		340,000		359,029
4.540% 8/15/47		2,165,000		2,271,254

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

	Principal Amount		Value
Reynolds American, Inc.
5.850% 8/15/45	$	1,160,000	$	1,413,395
				4,043,678
Airlines — 0.2%
Continental Airlines, Inc.
5.983% 10/19/23		713,477		721,626
US Airways, Inc.
7.125% 4/22/25		674,003		710,034
				1,431,660
Auto Manufacturers — 0.6%
Ford Motor Credit Co. LLC
3.219% 1/09/22		1,050,000		1,050,000
3.339% 3/28/22		955,000		956,671
4.250% 9/20/22		435,000		442,830
General Motors Co.
4.875% 10/02/23		150,000		159,361
General Motors Financial Co., Inc.
3.150% 6/30/22		805,000		814,059
3.450% 4/10/22		1,720,000		1,725,256
3.550% 7/08/22		410,000		415,954
				5,564,131
Banks — 7.1%
Bank of America Corp.
SOFR + 1.060% 2.087% VRN 6/14/29		1,835,000		1,823,661
3 mo. USD LIBOR + .790% 3.004% VRN 12/20/23		355,000		362,359
3 mo. USD LIBOR + .810% 3.366% VRN 1/23/26		1,900,000		1,999,557
3 mo. USD LIBOR + .970% 3.458% VRN 3/15/25		3,465,000		3,624,357
3 mo. USD LIBOR + 1.070% 3.970% VRN 3/05/29		1,670,000		1,829,842
Citigroup, Inc. SOFR + .770%
1.462% VRN 6/09/27		1,225,000		1,204,011
Credit Suisse Group AG
SOFR + .980% 1.305% VRN 2/02/27 (c)		1,315,000		1,270,503
SOFR + 2.044% 2.193% VRN 6/05/26 (c)		885,000		890,331
SOFR + 1.560% 2.593% VRN 9/11/25 (c)		875,000		893,696
SOFR + 1.730% 3.091% VRN 5/14/32 (c)		975,000		993,220
4.282% 1/09/28 (c)		345,000		374,723
Discover Bank
4.200% 8/08/23		1,120,000		1,176,287

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

	Principal Amount		Value
DNB Bank ASA 1 year CMT + .680%
1.605% VRN 3/30/28 (c)	$	1,400,000	$	1,366,995
Global Bank Corp. 3 mo. USD LIBOR + 3.300%
5.250% VRN 4/16/29 (c)		200,000		206,700
The Goldman Sachs Group, Inc.
SOFR + .486% 0.925% VRN 10/21/24		895,000		891,248
SOFR + .789% 1.093% VRN 12/09/26		485,000		472,850
1.217% 12/06/23		2,245,000		2,250,146
SOFR + .798% 1.431% VRN 3/09/27		2,295,000		2,249,432
SOFR + .913% 1.948% VRN 10/21/27		1,755,000		1,748,328
3 mo. USD LIBOR + .990% 2.905% VRN 7/24/23		885,000		894,990
HSBC Holdings PLC
SOFR + 1.290% 1.589% VRN 5/24/27		1,695,000		1,658,518
SOFR + 1.732% 2.013% VRN 9/22/28		1,370,000		1,342,034
SOFR + 1.929% 2.099% VRN 6/04/26		1,480,000		1,490,236
SOFR + 1.285% 2.206% VRN 8/17/29		1,135,000		1,113,556
JP Morgan Chase & Co.
SOFR + .580% 0.969% VRN 6/23/25		2,650,000		2,624,719
SOFR + .885% 1.578% VRN 4/22/27		1,360,000		1,344,703
JPMorgan Chase & Co.
SOFR + .580% 0.697% VRN 3/16/24		440,000		438,958
SOFR + .490% 0.768% VRN 8/09/25		880,000		866,234
SOFR + .605% 1.561% VRN 12/10/25		1,890,000		1,892,943
Lloyds Banking Group PLC
1 year CMT + .850% 1.627% VRN 5/11/27		1,000,000		984,997
3 mo. USD LIBOR + 1.249% 2.858% VRN 3/17/23		885,000		888,439
3 mo. USD LIBOR + .810% 2.907% VRN 11/07/23		1,255,000		1,275,290
1 year CMT + 3.500% 3.870% VRN 7/09/25		415,000		438,482
Macquarie Group Ltd.
SOFR + 1.069% 1.340% VRN 1/12/27 (c)		920,000		895,565
SOFR + 1.440% 2.691% VRN 6/23/32 (c) (d)		5,000		4,992
SOFR + 1.532% 2.871% VRN 1/14/33 (c)		1,335,000		1,332,549
Morgan Stanley
SOFR + .560% 1.164% VRN 10/21/25		2,885,000		2,862,845
SOFR + .879% 1.593% VRN 5/04/27		1,365,000		1,351,159
Natwest Group PLC 3 mo. USD LIBOR + 1.762%
4.269% VRN 3/22/25		1,710,000		1,811,400
Santander UK Group Holdings PLC
SOFR + .787% 1.089% VRN 3/15/25		1,825,000		1,806,456
1 year CMT + 1.250% 1.532% VRN 8/21/26		295,000		290,311
SOFR + .989% 1.673% VRN 6/14/27		340,000		333,070
3 mo. USD LIBOR + 1.570% 4.796% VRN 11/15/24		525,000		557,277

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

	Principal Amount		Value
Santander UK PLC
5.000% 11/07/23 (c)	$	1,390,000	$	1,478,251
UBS AG
0.700% 8/09/24 (c)		1,355,000		1,339,540
Wells Fargo & Co.
3 mo. USD LIBOR + .750% 2.164% VRN 2/11/26		1,800,000		1,827,583
SOFR + 2.100% 2.393% VRN 6/02/28		1,710,000		1,739,081
3 mo. USD LIBOR + 1.310% 3.584% VRN 5/22/28		1,345,000		1,446,843
				61,959,267
Beverages — 0.4%
Anheuser-Busch Cos. LLC/Anheuser-Busch InBev Worldwide, Inc.
4.900% 2/01/46		2,215,000		2,808,294
Bacardi Ltd.
5.300% 5/15/48 (c)		275,000		359,885
				3,168,179
Chemicals — 0.3%
International Flavors & Fragrances, Inc.
2.300% 11/01/30 (c)		1,685,000		1,654,056
5.000% 9/26/48		430,000		554,524
				2,208,580
Commercial Services — 0.4%
IHS Markit Ltd.
4.000% 3/01/26 (c)		399,000		431,187
4.750% 2/15/25 (c)		930,000		1,012,538
4.750% 8/01/28		750,000		869,062
5.000% 11/01/22 (c)		845,000		869,083
				3,181,870
Diversified Financial Services — 0.8%
AerCap Ireland Capital DAC / AerCap Global Aviation Trust
3.300% 1/30/32		2,270,000		2,317,224
AerCap Ireland Capital DAC/AerCap Global Aviation Trust
3.875% 1/23/28 (d)		265,000		281,230
4.125% 7/03/23		220,000		228,515
Air Lease Corp.
3.250% 3/01/25		950,000		986,092
Avolon Holdings Funding Ltd.

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

	Principal Amount		Value
2.528% 11/18/27 (c)	$	999,000	$	971,131
2.875% 2/15/25 (c)		860,000		878,833
3.950% 7/01/24 (c)		380,000		398,262
5.250% 5/15/24 (c)		110,000		118,032
Discover Financial Services
3.950% 11/06/24		150,000		159,560
Park Aerospace Holdings Ltd.
4.500% 3/15/23 (c)		700,000		722,448
5.500% 2/15/24 (c)		75,000		80,437
				7,141,764
Electric — 1.3%
Ameren Illinois Co.
3.700% 12/01/47		480,000		546,654
Consolidated Edison Co. of New York, Inc.
4.650% 12/01/48		1,000,000		1,240,806
Duke Energy Carolinas LLC
3.700% 12/01/47		738,000		823,493
Duke Energy Corp.
2.550% 6/15/31		560,000		561,292
Entergy Louisiana LLC
3.780% 4/01/25		1,250,000		1,325,069
FirstEnergy Transmission LLC
2.866% 9/15/28 (c)		1,401,000		1,404,756
5.450% 7/15/44 (c)		600,000		759,249
Florida Power & Light Co.
3.990% 3/01/49		1,000,000		1,223,717
Metropolitan Edison Co.
4.000% 4/15/25 (c)		985,000		1,043,222
MidAmerican Energy Co.
4.400% 10/15/44		1,905,000		2,336,710
Mong Duong Finance Holdings BV
5.125% 5/07/29 (c)		250,000		242,188
				11,507,156
Engineering & Construction — 0.0%
Artera Services LLC
9.033% 12/04/25 (c)		257,000		271,889
Food — 0.3%
JBS USA LUX SA / JBS USA Food Co. / JBS USA Finance, Inc.
3.000% 5/15/32 (c)		910,000		910,000

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

	Principal Amount		Value
Kraft Heinz Foods Co.
4.875% 10/01/49	$	815,000	$	1,025,109
5.200% 7/15/45		750,000		954,862
Pilgrim's Pride Corp.
5.875% 9/30/27 (c)		75,000		79,195
				2,969,166
Gas — 0.2%
KeySpan Gas East Corp.
5.819% 4/01/41 (c)		1,337,000		1,765,307
Health Care – Products — 0.1%
Mozart Debt Merger Sub, Inc.
3.875% 4/01/29 (c)		643,000		640,730
Health Care – Services — 1.1%
Aetna, Inc.
3.500% 11/15/24		500,000		527,472
Centene Corp.
2.450% 7/15/28		1,951,000		1,921,735
4.250% 12/15/27		435,000		453,488
CommonSpirit Health
2.782% 10/01/30		455,000		466,174
HCA, Inc.
2.375% 7/15/31		230,000		226,689
4.125% 6/15/29		1,262,000		1,389,875
5.000% 3/15/24		975,000		1,048,573
5.125% 6/15/39		650,000		802,386
5.250% 4/15/25		644,000		712,681
5.250% 6/15/26		390,000		438,792
5.250% 6/15/49		485,000		624,930
Molina Healthcare, Inc.
3.875% 11/15/30 (c)		417,000		432,638
3.875% 5/15/32 (c)		850,000		855,312
				9,900,745
Household Products & Wares — 0.0%
Central Garden & Pet Co.
5.125% 2/01/28		22,000		22,990

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

	Principal Amount		Value
Insurance — 1.2%
Athene Global Funding
1.985% 8/19/28 (c)	$	2,200,000	$	2,139,608
Farmers Exchange Capital
3 mo. USD LIBOR + 3.454% 5.454% VRN 10/15/54 (c)		3,290,000		3,971,724
3 mo. USD LIBOR + 3.744% 6.151% VRN 11/01/53 (c)		350,000		443,939
Teachers Insurance & Annuity Association of America 3 mo. USD LIBOR + 2.661%
4.375% VRN 9/15/54 (c)		4,000,000		4,157,724
				10,712,995
Internet — 0.2%
Tencent Holdings Ltd.
3.680% 4/22/41 (c)		455,000		473,101
3.840% 4/22/51 (c)		455,000		479,274
3.975% 4/11/29 (c)		410,000		446,191
				1,398,566
Lodging — 0.1%
Hyatt Hotels Corp.
1.800% 10/01/24		930,000		930,155
Media — 0.8%
Cable One, Inc.
4.000% 11/15/30 (c)		900,000		882,000
Charter Communications Operating LLC/Charter Communications Operating Capital
3.750% 2/15/28		500,000		536,032
4.908% 7/23/25		1,105,000		1,216,059
5.375% 4/01/38		5,000		5,964
5.375% 5/01/47		180,000		215,495
5.750% 4/01/48		1,088,000		1,360,897
CSC Holdings LLC
5.375% 2/01/28 (c)		125,000		129,421
Diamond Sports Group LLC/Diamond Sports Finance Co.
5.375% 8/15/26 (c)		1,175,000		587,500
Virgin Media Secured Finance PLC
4.500% 8/15/30 (c)		1,200,000		1,207,572
The Walt Disney Co.
3.600% 1/13/51		385,000		437,037
				6,577,977

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

	Principal Amount		Value
Mining — 0.0%
Corp. Nacional del Cobre de Chile
3.150% 1/14/30 (c)	$	200,000	$	204,072
Miscellaneous - Manufacturing — 0.2%
GE Capital International Funding Co.
4.418% 11/15/35		1,067,000		1,275,193
General Electric Co.
6.750% 3/15/32		480,000		655,311
				1,930,504
Oil & Gas — 0.9%
Antero Resources Corp.
8.375% 7/15/26 (c)		81,000		92,224
Exxon Mobil Corp.
3.452% 4/15/51		1,020,000		1,109,492
KazMunayGas National Co. JSC
3.500% 4/14/33 (c)		200,000		207,187
3.500% 4/14/33 (c)		200,000		207,187
4.750% 4/19/27 (c)		200,000		220,764
Occidental Petroleum Corp.
0.000% 10/10/36		499,000		283,183
4.500% 7/15/44		400,000		412,000
Pertamina Persero PT
3.100% 8/27/30 (c)		875,000		891,401
Petroleos Mexicanos
6.625% 6/15/35		2,100,000		2,017,669
7.690% 1/23/50		295,000		284,675
Petronas Capital Ltd.
3.500% 4/21/30 (c)		200,000		216,129
Saudi Arabian Oil Co.
1.625% 11/24/25 (c)		200,000		198,739
Shell International Finance BV
4.550% 8/12/43		660,000		825,439
Sunoco LP / Sunoco Finance Corp.
4.500% 4/30/30 (c)		271,000		277,752
Transocean Guardian Ltd.
5.875% 1/15/24 (c)		227,800		215,841
Transocean Pontus Ltd.
6.125% 8/01/25 (c)		269,340		263,280

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

	Principal Amount		Value
Transocean Poseidon Ltd.
6.875% 2/01/27 (c)	$	233,000	$	225,136
				7,948,098
Oil & Gas Services — 0.0%
Transocean Proteus Ltd.
6.250% 12/01/24 (c)		85,500		84,218
USA Compression Partners LP/USA Compression Finance Corp.
6.875% 4/01/26		70,000		72,800
6.875% 9/01/27		217,000		229,206
				386,224
Packaging & Containers — 0.2%
Berry Global, Inc.
4.875% 7/15/26 (c)		585,000		605,136
Mauser Packaging Solutions Holding Co.
5.500% 4/15/24 (c)		70,000		70,642
Sealed Air Corp.
1.573% 10/15/26 (c)		1,200,000		1,164,198
4.000% 12/01/27 (c)		70,000		72,949
				1,912,925
Pharmaceuticals — 1.7%
AbbVie, Inc.
4.450% 5/14/46		1,395,000		1,692,412
4.500% 5/14/35		234,000		280,724
4.550% 3/15/35		576,000		694,525
Bayer US Finance II LLC
4.250% 12/15/25 (c)		955,000		1,033,394
4.375% 12/15/28 (c)		2,735,000		3,057,296
4.625% 6/25/38 (c)		1,310,000		1,533,172
4.875% 6/25/48 (c)		220,000		271,261
Becton Dickinson and Co.
2.823% 5/20/30		1,735,000		1,797,639
Cigna Corp.
3.400% 3/15/51		210,000		220,416
4.125% 11/15/25		695,000		760,410
CVS Health Corp.
3.250% 8/15/29		5,000		5,336
5.050% 3/25/48		2,165,000		2,839,830

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

	Principal Amount		Value
Endo DAC / Endo Finance LLC / Endo Finco, Inc.
6.000% 6/30/28 (c)	$	423,000	$	315,135
				14,501,550
Pipelines — 1.0%
Energy Transfer LP
4.950% 6/15/28		1,291,000		1,453,324
5.350% 5/15/45		370,000		426,106
5.400% 10/01/47		1,275,000		1,500,742
5.500% 6/01/27		264,000		301,159
5.950% 10/01/43		750,000		903,762
Galaxy Pipeline Assets Bidco Ltd.
2.160% 3/31/34 (c)		400,000		392,048
Kinder Morgan, Inc.
5.550% 6/01/45		565,000		716,409
Plains All American Pipeline LP / PAA Finance Corp.
4.500% 12/15/26		228,000		250,427
Rockies Express Pipeline LLC
4.950% 7/15/29 (c)		1,000,000		1,066,250
6.875% 4/15/40 (c)		745,000		841,850
Southern Gas Corridor CJSC
6.875% 3/24/26 (c)		400,000		459,456
				8,311,533
Real Estate Investment Trusts (REITS) — 1.4%
American Campus Communities Operating Partnership LP
3.625% 11/15/27		1,220,000		1,303,676
CyrusOne LP / CyrusOne Finance Corp.
3.450% 11/15/29		430,000		464,056
CyrusOne LP/CyrusOne Finance Corp.
2.150% 11/01/30		1,020,000		1,009,362
GLP Capital LP/GLP Financing II, Inc.
4.000% 1/15/30		60,000		63,483
5.250% 6/01/25		680,000		744,771
5.300% 1/15/29		620,000		703,824
5.375% 4/15/26		1,755,000		1,954,315
Healthpeak Properties, Inc.
4.000% 6/01/25		1,675,000		1,802,951
Hudson Pacific Properties LP
4.650% 4/01/29		1,185,000		1,339,322

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

	Principal Amount		Value
SL Green Operating Partnership LP
3.250% 10/15/22	$	1,000,000	$	1,016,301
Ventas Realty LP
2.500% 9/01/31		530,000		525,309
3.750% 5/01/24 (d)		1,050,000		1,099,812
3.850% 4/01/27		165,000		179,597
				12,206,779
Retail — 0.1%
Michaels Cos., Inc.
5.250% 5/01/28 (c)		895,000		893,881
Savings & Loans — 0.3%
Nationwide Building Society
3 mo. USD LIBOR + 1.181% 3.622% VRN 4/26/23 (c)		620,000		625,056
3 mo. USD LIBOR + 1.064% 3.766% VRN 3/08/24 (c)		1,215,000		1,251,536
3 mo. USD LIBOR + 1.392% 4.363% VRN 8/01/24 (c)		300,000		314,199
				2,190,791
Semiconductors — 0.1%
Intel Corp.
3.050% 8/12/51 (d)		1,129,000		1,159,435
Software — 0.3%
Change Healthcare Holdings LLC/Change Healthcare Finance, Inc.
5.750% 3/01/25 (c)		325,000		327,788
Oracle Corp.
2.875% 3/25/31		115,000		115,860
3.950% 3/25/51		1,748,000		1,821,351
				2,264,999
Telecommunications — 2.9%
AT&T, Inc.
2.550% 12/01/33		1,115,000		1,092,047
3.800% 12/01/57		4,820,000		5,038,263
4.500% 5/15/35		110,000		127,247
4.750% 5/15/46		100,000		121,140
4.850% 3/01/39		366,000		438,503
5.250% 3/01/37		850,000		1,053,610
Intelsat Jackson Holdings SA
8.500% 10/15/24 (c) (e)		378,000		173,232

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

	Principal Amount		Value
9.750% 7/15/25 (c) (e)	$	1,379,000	$	633,058
Level 3 Financing, Inc.
3.400% 3/01/27 (c)		825,000		851,771
Sprint Corp.
7.875% 9/15/23		74,000		81,493
Sprint Spectrum Co. LLC/Sprint Spectrum Co. II LLC/Sprint Spectrum Co. III LLC
4.738% 3/20/25 (c)		2,799,063		2,928,379
5.152% 9/20/29 (c)		2,015,000		2,221,437
T-Mobile USA, Inc.
2.250% 2/15/26		840,000		842,100
2.250% 2/15/26 (c)		377,000		377,942
2.550% 2/15/31		955,000		951,259
3.750% 4/15/27		1,270,000		1,376,130
3.875% 4/15/30		580,000		635,173
4.375% 4/15/40		840,000		962,696
4.750% 2/01/28		175,000		184,188
Verizon Communications, Inc.
2.355% 3/15/32 (c)		1,885,000		1,859,629
2.550% 3/21/31		410,000		414,109
Vodafone Group PLC
4.875% 6/19/49		1,260,000		1,594,336
5.250% 5/30/48		1,000,000		1,306,725
				25,264,467
Transportation — 0.0%
Empresa de Transporte de Pasajeros Metro SA
3.650% 5/07/30 (c)		200,000		212,250
TOTAL CORPORATE DEBT (Cost $209,754,713)				216,639,545
MUNICIPAL OBLIGATIONS — 0.4%
City of New York NY, General Obligation
3.000% 8/01/34		945,000		986,659
County of Miami-Dade FL Aviation Revenue, Revenue Bond
2.707% 10/01/33		375,000		378,471
New York City Transitional Finance Authority, Revenue Bond
5.508% 8/01/37		985,000		1,294,757

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

	Principal Amount		Value
New York State Dormitory Authority, Revenue Bond
5.051% 9/15/27	$	600,000	$	701,463
				3,361,350
TOTAL MUNICIPAL OBLIGATIONS (Cost $3,331,090)				3,361,350
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 11.9%
Commercial Mortgage-Backed Securities — 2.0%
BAMLL Commercial Mortgage Securities Trust
Series 2019-BPR, Class AMP, 3.287% 11/05/32 (c)		1,920,000		1,965,867
Series 2018-PARK, Class A, 4.091% VRN 8/10/38 (c) (f)		1,280,000		1,434,139
BX Trust, Series 2019-OC11, Class A
3.202% 12/09/41 (c)		420,000		442,994
CALI Mortgage Trust, Series 2019-101C, Class A
3.957% 3/10/39 (c)		945,000		1,049,053
COMM Mortgage Trust, Series 2015-CR27, Class A3
3.349% 10/10/48		2,631,943		2,758,965
CPT Mortgage Trust, Series 2019-CPT, Class A
2.865% 11/13/39 (c)		805,000		836,124
DC Office Trust, Series 2019-MTC, Class A
2.965% 9/15/45 (c)		860,000		896,042
Hudson Yards Mortgage Trust
Series 2019-55HY, Class A, 2.943% VRN 12/10/41 (c) (f)		860,000		898,633
Series 2019-30HY, Class A, 3.228% 7/10/39 (c)		880,000		941,435
JP Morgan Chase Commercial Mortgage Securities Trust Series 2021-HTL5, Class A, 1 mo. USD LIBOR + 1.115%
1.225% FRN 11/15/38 (c)		2,138,000		2,129,986
JP Morgan Chase Commercial Mortgage Securities Trust, Series 2019-OSB, Class A
3.397% 6/05/39 (c)		900,000		970,620
MKT Mortgage Trust, Series 2020-525M, Class A
2.694% 2/12/40 (c)		1,030,000		1,057,291
One Bryant Park Trust, Series 2019-OBP, Class A
2.516% 9/15/54 (c)		1,085,000		1,097,497
RBS Commercial Funding, Inc. Trust, Series 2013-GSP, Class A,
3.834% VRN 1/15/32 (c) (f)		640,000		663,383
SFAVE Commercial Mortgage Securities Trust, Series 2015-5AVE, Class A2B,
4.144% VRN 1/05/43 (c) (f)		50,000		54,382
				17,196,411

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

	Principal Amount		Value
Home Equity Asset-Backed Securities — 0.4%
Argent Securities, Inc., Series 2005-W2, Class M1, 1 mo. USD LIBOR + .735%
0.837% FRN 10/25/35	$	3,167,776	$	3,166,838
Option One Mortgage Loan Trust, Series 2006-1, Class 1A1, 1 mo. USD LIBOR + .440%
0.542% FRN 1/25/36		522,331		521,854
				3,688,692
Other Asset-Backed Securities — 4.0%
AGL CLO 13 Ltd., Series 2021-13A, Class A1, 3 mo. USD LIBOR + 1.160%
1.320% FRN 10/20/34 (c)		2,400,000		2,398,581
AIG CLO 2019-2 Ltd., Series 2019-2A, Class BR, 3 mo. USD LIBOR + 1.600%
1.729% FRN 10/25/33 (c)		2,400,000		2,399,993
Aimco CLO 11 Ltd., Series 2020-11A, Class AR, 3 mo. USD LIBOR + 1.130%
1.253% FRN 10/17/34 (c)		2,075,000		2,070,138
Ajax Mortgage Loan Trust, Series 2019-,Class A1,
2.860% STEP 7/25/59 (c)		2,420,260		2,359,280
Barings CLO Ltd., Series 2013-IA, Class AR, 3 mo. USD LIBOR + .800%
0.932% FRN 1/20/28 (c)		2,913,386		2,912,218
BSPRT Issuer Ltd., Series 2018-FL4, Class A, 1 mo. USD LIBOR + 1.050%
1.160% FRN 9/15/35 (c)		313,274		313,275
Countrywide Asset-Backed Certificates Trust, Series 2004-5, Class M1, 1 mo. USD LIBOR + .855%
0.957% FRN 8/25/34		213,880		212,019
Dryden 33 Senior Loan Fund, Series 2014-33A, Class AR3, 3 mo. USD LIBOR + 1.000%
1.124% FRN 4/15/29 (c)		1,436,611		1,436,159
First Franklin Mortgage Loan Trust, Series 2005-FF9, Class A4, 1 mo. USD LIBOR + .720%
0.822% FRN 10/25/35		276,978		276,160
Flatiron CLO 21 Ltd., Series 2021-1A, Class B, 3 mo. USD LIBOR + 1.600%
1.751% FRN 7/19/34 (c)		2,400,000		2,375,633
GoldenTree Loan Opportunities Ltd., Series 2014-9A, Class AR2, 3 mo. USD LIBOR + 1.110%
1.239% FRN 10/29/29 (c)		2,100,000		2,100,701
GSAMP Trust, Series 2006-HE1, Class M1, 1 mo. USD LIBOR + .585%
0.687% FRN 1/25/36		1,944,316		1,926,804
LCM Ltd., Series 19A, Class AR, 3 mo. USD LIBOR + 1.240%
1.364% FRN 7/15/27 (c)		650,650		650,893

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

	Principal Amount		Value
Lehman XS Trust, Series 2005-4, Class 1A3, 1 mo. USD LIBOR + .800%
0.902% FRN 10/25/35	$	106,940	$	106,797
LoanCore 2018-CRE1 Issuer Ltd., Series 2018-CRE1, Class B, 1 mo. USD LIBOR + 1.700%
1.810% FRN 5/15/28 (c)		2,570,000		2,565,902
Magnetite Ltd., Series 2012-7A, Class A1R2, 3 mo. USD LIBOR + .800%
0.924% FRN 1/15/28 (c)		1,460,056		1,461,202
Morgan Stanley Capital, Inc. Trust
Series 2006-HE1, Class A4, 1 mo. USD LIBOR + .580% 0.682% FRN 1/25/36		2,599,354		2,532,755
Series 2006-NC2, Class A2D, 1 mo. USD LIBOR + .580% 0.682% FRN 2/25/36		2,284,222		2,283,677
Rockford Tower Ltd., Series 2019-1A, Class AR, 3 mo. USD LIBOR + 1.120%
1.252% FRN 4/20/34 (c)		2,435,000		2,428,552
TRTX Issuer Ltd., Series 2019-FL3, Class A, SOFR30A + 1.264%
1.315% FRN 10/15/34 (c)		2,192,764		2,192,078
				35,002,817
Student Loans Asset-Backed Securities — 2.2%
Access Group, Inc., Series 2015-1, Class A, 1 mo. USD LIBOR + .700%
0.802% FRN 7/25/56 (c)		1,672,412		1,660,518
Education Loan Asset-Backed Trust, Series 2013-1, Class A2, 1 mo. USD LIBOR + .800%
0.902% FRN 4/26/32 (c)		3,251,500		3,247,636
SLM Student Loan Trust
Series 2014-1, Class A3, 1 mo. USD LIBOR + .600% 0.703% FRN 2/26/29		1,402,356		1,399,405
Series 2012-7, Class A3, 1 mo. USD LIBOR + .650% 0.753% FRN 5/26/26		2,634,876		2,655,939
Series 2008-5, Class B, 3 mo. USD LIBOR + 1.850% 1.850% FRN 7/25/73		3,735,000		3,738,704
Series 2008-9, Class B, 3 mo. USD LIBOR + 2.250% 2.374% FRN 10/25/83		3,630,000		3,653,984
Wachovia Student Loan Trust, Series 2006-1, Class A6, 3 mo. USD LIBOR + .170%
0.294% FRN 4/25/40 (c)		2,280,838		2,240,763
				18,596,949
Whole Loan Collateral Collateralized Mortgage Obligations — 3.3%
American Home Mortgage Investment Trust, Series 2006-1, Class 12A1, 1 mo. USD LIBOR + .400%
0.502% FRN 3/25/46		1,770,684		1,712,642

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

	Principal Amount		Value
Bear Stearns ALT-A Trust, Series 2005-4, Class 25A1,
2.530% VRN 5/25/35 (f)	$	1,066,193	$	1,033,588
Citigroup Mortgage Loan Trust, Series 2006-AR2, Class 1A2,
2.549% VRN 3/25/36 (f)		3,516		3,330
Credit Suisse Mortgage Trust, Series 2018-RPL9, Class A,
3.850% VRN 9/25/57 (c) (f)		1,972,550		2,059,815
First Horizon Alternative Mortgage Securities Trust, Series 2005-AA9, Class 2A1,
2.298% VRN 11/25/35 (f)		1,711,356		1,539,842
HarborView Mortgage Loan Trust
Series 2006-10, Class 1A1A, 1 mo. USD LIBOR + .200% 0.304% FRN 11/19/36		2,902,890		2,645,261
Series 2007-6, Class 1A1A, 1 mo. USD LIBOR + .200% 0.304% FRN 8/19/37		2,886,588		2,515,458
HomeBanc Mortgage Trust, Series 2005-5, Class A1, 1 mo. USD LIBOR + .520%
0.622% FRN 1/25/36		3,193,566		3,123,987
JP Morgan Mortgage Trust
Series 2005-A5, Class 1A2, 2.460% VRN 8/25/35 (f)		107,652		107,055
Series 2021-13, Class A3, 2.500% VRN 4/25/52 (c) (f)		4,333,022		4,324,560
MASTR Adjustable Rate Mortgages Trust, Series 2004-3, Class 4A1,
2.207% VRN 4/25/34 (f)		493,381		485,258
Morgan Stanley Resecuritization Trust, Series 2014-R8, Class 3A, 12 mo. MTA + .750%
0.834% FRN 6/26/47 (c)		195,375		194,302
RALI Trust, Series 2006-QA7, Class 2A1, 1 mo. USD LIBOR + .370%
0.472% FRN 8/25/36		589,018		567,421
Residential Asset Securitization Trust, Series 2006-A14C, Class 1A1
6.250% 12/25/36		2,123,013		2,015,664
Structured Asset Mortgage Investments Trust, Series 2006-AR1, Class 3A1, 1 mo. USD LIBOR + .460%
0.562% FRN 2/25/36		2,586,335		2,425,798
Washington Mutual Mortgage Pass-Through Certificates Trust
Series 2005-AR2, Class 2A1A, 1 mo. USD LIBOR + .620% 0.722% FRN 1/25/45		715,666		711,280
Series 2005-7, Class 4CB, 7.000% 8/25/35		2,756,880		2,366,762
Wells Fargo Mortgage-Backed Securities Trust, Series 2007-AR3, Class A4,
2.672% VRN 4/25/37 (f)		980,259		945,652
				28,777,675
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $101,828,993)				103,262,544

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

	Principal Amount		Value
SOVEREIGN DEBT OBLIGATIONS — 1.0%
Abu Dhabi Government International Bond
2.500% 9/30/29 (c)	$	647,000	$	671,314
Brazilian Government International Bond
3.875% 6/12/30		730,000		708,100
Chile Government International Bond
2.550% 1/27/32		200,000		199,500
Colombia Government International Bond
3.000% 1/30/30 (d)		600,000		548,400
4.500% 1/28/26		400,000		418,504
Dominican Republic International Bond
4.500% 1/30/30 (c)		440,000		447,150
Egypt Government International Bond
7.600% 3/01/29 (c) (d)		200,000		198,183
Hungary Government International Bond
2.125% 9/22/31 (c)		250,000		245,962
Indonesia Government International Bond
2.850% 2/14/30		300,000		312,547
Mexico Government International Bond
2.659% 5/24/31		613,000		597,681
3.750% 1/11/28		420,000		451,294
4.750% 4/27/32		200,000		226,100
Panama Government International Bond
2.252% 9/29/32		200,000		189,750
3.160% 1/23/30		400,000		414,004
Peruvian Government International Bond
2.844% 6/20/30		200,000		202,066
4.125% 8/25/27		254,000		279,085
Philippine Government International Bond
2.457% 5/05/30		200,000		206,258
Qatar Government International Bond
4.500% 4/23/28 (c)		600,000		688,920
Republic of South Africa Government International Bond
4.850% 9/30/29		400,000		413,000
4.875% 4/14/26		200,000		213,000
Republic of Turkey International Bond
3.250% 3/23/23		200,000		194,207
Romanian Government International Bond
3.000% 2/14/31 (c)		270,000		273,794
Saudi Government International Bond
3.250% 10/26/26 (c)		400,000		426,013

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

	Principal Amount		Value
3.625% 3/04/28 (c)	$	200,000	$	217,740
				8,742,572
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $8,917,084)				8,742,572
U.S. Government Agency Obligations and Instrumentalities (g) — 32.0%
Collateralized Mortgage Obligations — 0.9%
Federal Home Loan Mortgage Corp. Multifamily Structured Pass-Through Certificates Series K155, Class A3 3.750% 4/25/33		2,115,000		2,475,474
Federal National Mortgage Association REMICS
Series 2018-43, Class CT, 3.000% 6/25/48		753,543		784,018
Series 2018-55, Class PA, 3.500% 1/25/47		846,955		867,166
Series 2018-54, Class KA, 3.500% 1/25/47		816,209		834,597
Series 2018-38, Class PA, 3.500% 6/25/47		1,088,636		1,118,699
Government National Mortgage Association
Series 2018-124, Class NW, 3.500% 9/20/48		678,860		715,662
Series 2019-15, Class GT, 3.500% 2/20/49		818,399		863,159
				7,658,775
Pass-Through Securities — 30.1%
Federal Home Loan Mortgage Corp.
Pool #G18596 3.000% 4/01/31		325,806		341,878
Pool #G18691 3.000% 6/01/33		120,669		126,470
Pool #G08710 3.000% 6/01/46		70,348		73,634
Pool #G08715 3.000% 8/01/46		1,488,094		1,557,613
Pool #G08721 3.000% 9/01/46		201,808		211,173
Pool #G08726 3.000% 10/01/46		2,695,131		2,820,196
Pool #G08732 3.000% 11/01/46		1,906,973		1,995,465
Pool #G08741 3.000% 1/01/47		1,274,983		1,333,351
Pool #G18713 3.500% 11/01/33		877,824		927,379
Pool #G16756 3.500% 1/01/34		363,110		384,970
Pool #G60038 3.500% 1/01/44		653,052		700,757
Pool #G07848 3.500% 4/01/44		5,103,965		5,523,261
Pool #G07924 3.500% 1/01/45		1,431,713		1,543,066
Pool #G60138 3.500% 8/01/45		2,941,657		3,184,236
Pool #G08711 3.500% 6/01/46		1,209,910		1,287,707

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

	Principal Amount		Value
Pool #G08716 3.500% 8/01/46	$	1,773,631	$	1,887,120
Pool #G67703 3.500% 4/01/47		2,050,104		2,202,506
Pool #G67706 3.500% 12/01/47		1,636,967		1,757,633
Pool #G08792 3.500% 12/01/47		1,452,476		1,537,813
Pool #G67707 3.500% 1/01/48		1,910,938		2,069,716
Pool #G67708 3.500% 3/01/48		3,550,578		3,801,208
Pool #G67709 3.500% 3/01/48		4,635,556		4,970,379
Pool #G67711 4.000% 3/01/48		543,316		592,318
Pool #G67713 4.000% 6/01/48		1,430,764		1,550,862
Pool #G67714 4.000% 7/01/48		1,986,777		2,163,170
Pool #G67717 4.000% 11/01/48		1,748,111		1,902,768
Pool #G08843 4.500% 10/01/48		741,455		795,632
Pool #G08826 5.000% 6/01/48		268,230		292,776
Pool #G08844 5.000% 10/01/48		91,808		99,980
Federal National Mortgage Association
Pool #MA4093 2.000% 8/01/40		954,396		964,265
Pool #MA4152 2.000% 10/01/40		3,532,884		3,569,418
Pool #MA4176 2.000% 11/01/40		2,583,229		2,609,942
Pool #MA4333 2.000% 5/01/41		753,524		762,494
Pool #BL6060 2.455% 4/01/40		1,265,000		1,275,063
Pool #MA3029 3.000% 6/01/32		327,182		343,204
Pool #MA1607 3.000% 10/01/33		2,258,608		2,383,569
Pool #BN7755 3.000% 9/01/49		2,177,821		2,288,955
Pool #MA3811 3.000% 10/01/49		603,940		619,424
Pool #BO2259 3.000% 10/01/49		3,665,266		3,837,415
Pool #AB4262 3.500% 1/01/32		1,499,499		1,596,295
Pool #MA1148 3.500% 8/01/42		3,130,647		3,378,719
Pool #CA0996 3.500% 1/01/48		97,722		104,526
Pool #MA3276 3.500% 2/01/48		225,901		238,736
Pool #MA3305 3.500% 3/01/48		770,256		814,021
Pool #MA3332 3.500% 4/01/48		30,687		32,431
Pool #CA3633 3.500% 6/01/49		870,232		935,178
Pool #MA2995 4.000% 5/01/47		664,430		715,928
Pool #AS9830 4.000% 6/01/47		410,213		440,853
Pool #MA3027 4.000% 6/01/47		598,990		643,730
Pool #AS9972 4.000% 7/01/47		343,593		369,258
Pool #AL9106 4.500% 2/01/46		321,809		352,549
Pool #CA1710 4.500% 5/01/48		1,298,714		1,392,067
Pool #CA1711 4.500% 5/01/48		22,826		24,563
Pool #CA2208 4.500% 8/01/48		953,003		1,024,602
Government National Mortgage Association II
Pool #MA4126 3.000% 12/20/46		1,849,936		1,933,952
Pool #MA4836 3.000% 11/20/47		1,322,959		1,380,561

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

	Principal Amount		Value
Pool #MA6209 3.000% 10/20/49	$	576,269	$	590,195
Pool #MA4127 3.500% 12/20/46		1,269,003		1,337,475
Pool #MA4382 3.500% 4/20/47		219,569		231,004
Pool #MA4719 3.500% 9/20/47		1,983,630		2,082,602
Pool #MA4837 3.500% 11/20/47		267,599		280,449
Pool #MA4962 3.500% 1/20/48		681,710		716,309
Pool #MA5019 3.500% 2/20/48		928,244		974,196
Pool #MA4838 4.000% 11/20/47		583,834		620,417
Pool #MA4901 4.000% 12/20/47		472,211		501,209
Pool #MA5078 4.000% 3/20/48		398,237		422,070
Pool #MA5466 4.000% 9/20/48		268,443		283,817
Pool #MA5528 4.000% 10/20/48		1,073,085		1,134,204
Pool #MA4264 4.500% 2/20/47		281,629		304,294
Pool #MA4512 4.500% 6/20/47		1,771,504		1,906,324
Pool #MA3666 5.000% 5/20/46		35,520		39,371
Pool #MA3806 5.000% 7/20/46		229,282		254,144
Pool #MA4072 5.000% 11/20/46		47,329		52,515
Pool #MA4454 5.000% 5/20/47		937,503		1,029,202
Government National Mortgage Association II TBA
2.000% 5/01/51 (h)		8,625,000		8,696,763
2.500% 4/01/51 (h)		6,900,000		7,074,656
2.500% 4/01/51 (h)		5,775,000		5,908,547
Uniform Mortgage Backed Securities TBA
1.500% 8/01/36 (h)		6,850,000		6,867,928
2.000% 7/01/36 (h)		11,150,000		11,406,537
2.000% 7/01/51 (h)		54,175,000		53,954,914
2.500% 7/01/51 (h)		64,625,000		65,844,293
3.000% 5/01/49 (h)		7,875,000		8,150,010
				262,330,200
U.S. Agencies Notes — 1.0%
Federal Home Loan Banks 1.040% 6/14/24		8,900,000		8,892,445
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $275,684,991)				278,881,420
U.S. TREASURY OBLIGATIONS — 37.2%
U.S. Treasury Bonds & Notes — 37.2%
U.S. Treasury Bond
1.750% 8/15/41		1,105,000		1,069,110
1.875% 11/15/51		49,795,000		49,437,098
2.000% 11/15/41		1,550,000		1,567,438
2.250% 5/15/41		10,435,000		10,941,216
U.S. Treasury Inflation Index
0.125% 2/15/51		2,023,281		2,397,747

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

	Principal Amount		Value
U.S. Treasury Note
0.250% 9/30/23	$	3,001,000	$	2,979,952
0.375% 10/31/23		35,825,000		35,619,952
0.500% 11/30/23 (d)		61,540,000		61,308,794
0.750% 12/31/23		19,425,000		19,431,838
0.875% 9/30/26		4,656,000		4,576,328
1.125% 10/31/26		29,660,000		29,485,306
1.250% 11/30/26		54,015,000		54,023,826
1.250% 12/31/26		33,810,000		33,796,780
1.375% 11/15/31		17,215,000		16,999,813
				323,635,198
TOTAL U.S. TREASURY OBLIGATIONS (Cost $323,724,390)				323,635,198
TOTAL BONDS & NOTES (Cost $944,179,133)				955,522,971
TOTAL PURCHASED OPTIONS (#) — 0.0% (Cost $445,579)				333,908
		Number of Shares
MUTUAL FUNDS — 6.7%
DIVERSIFIED FINANCIAL SERVICES — 6.7%
State Street Navigator Securities Lending Government Money Market Portfolio
(i)		58,507,243		58,507,243
TOTAL MUTUAL FUNDS (Cost $58,507,243)				58,507,243
TOTAL LONG-TERM INVESTMENTS (Cost $1,003,131,955)				1,014,364,122
		Principal Amount
SHORT-TERM INVESTMENTS — 10.2%
Repurchase Agreement — 0.8%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (j)		6,745,624		6,745,624

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

	Principal Amount		Value
U.S. Treasury Bill — 9.4%
Japan Treasury Discount Bill
(0.149)% 2/28/22 JPY (k) (l)	$	1,020,000,000	$	8,868,767
U.S. Treasury Bill
0.023% 3/03/22 (k)		2,625,000		2,624,796
0.036% 3/03/22 (k)		2,960,000		2,959,770
0.037% 3/03/22 (k)		7,440,000		7,439,421
0.042% 3/03/22 (k)		3,990,000		3,989,689
0.046% 2/03/22 (k)		830,000		829,979
0.046% 1/13/22 (k)		2,885,000		2,884,988
0.047% 4/07/22 (k)		8,260,000		8,258,426
0.047% 4/14/22 (k)		13,910,000		13,907,073
0.048% 4/07/22 (k)		4,120,000		4,119,215
0.048% 4/28/22 (k)		3,030,000		3,029,262
0.049% 4/07/22 (k)		3,090,000		3,089,411
0.051% 2/17/22 (k)		2,270,000		2,269,915
0.051% 4/21/22 (k)		4,805,000		4,803,937
0.082% 5/26/22 (k)		4,925,000		4,923,161
0.122% 6/09/22 (k)		2,515,000		2,513,793
0.129% 6/16/22 (k)		2,535,000		2,533,484
0.173% 6/23/22 (k)		2,815,000		2,812,760
				81,857,847
TOTAL SHORT-TERM INVESTMENTS (Cost $88,620,946)				88,603,471
TOTAL INVESTMENTS — 126.7% (Cost $1,091,752,901) (m)				1,102,967,593
Less Unfunded Loan Commitments — (0.0)%				(92,258)
NET INVESTMENTS — 126.7% (Cost $1,091,660,643)				1,102,875,335
Other Assets/(Liabilities) — (26.7)%				(232,080,754)
NET ASSETS — 100.0%			$	870,794,581

Abbreviation Legend

CLO Collateralized Loan Obligation

DIP Debtor In Possession

FRN Floating Rate Note

REMICS Real Estate Mortgage Investment Conduits

STEP Step Up Bond

TBA To Be Announced

VRN Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Unfunded or partially unfunded loan commitments.

(c) Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At December 31, 2021, the aggregate market value of these securities amounted to $127,721,093 or 14.67% of net assets.

(d) Denotes all or a portion of security on loan. The total value of securities on loan as of December 31, 2021, was $58,663,927 or 6.74% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $1,406,361 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 currently in default due to bankruptcy or failure to make payment of principal or interest of the issuer. Income is not being accrued. At December 31, 2021, these securities amounted to a value of $806,290 or 0.09% of net assets.

(f) Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions. These securities do not indicate a reference rate and spread in their description above. The rates shown are the current interest rates at December 31, 2021.

(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 $6,745,624. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $6,880,599.

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

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

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

(#) Exchange-Traded Options Purchased
Description	Expiration Date	Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
Eurodollar 1 Year Mid Curve Future	9/16/22		98.75		535	USD	131,690,250	$	240,750	$	336,134	$	(95,384)

(#) 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, 1/23/54

Goldman Sachs & Co.

1/19/24

2.75%##

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

USD

3,710,000

$

93,158

$

109,445

$

(16,287)

Exchange-Traded Options Written
Description	Expiration Date	Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
Eurodollar 1 Year Mid Curve Future	9/16/22		99.00		535	USD	132,954,188	$	(133,750)	$	(176,992)	$	43,242
Eurodollar 2 Year Mid Curve Future	9/16/22		98.25		255	USD	62,682,188		(221,531)		(206,585)		(14,946)
								$	(355,281)	$	(383,577)	$	28,296
Put
Eurodollar 1 Year Mid Curve Future	9/16/22		97.88		535	USD	132,954,188	$	(137,094)	$	(134,560)	$	(2,534)
Eurodollar 2 Year Mid Curve Future	9/16/22		98.25		255	USD	62,682,188		(173,719)		(219,336)		45,617
								$	(310,813)	$	(353,896)	$	43,083
								$	(666,094)	$	(737,473)	$	71,379

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
Goldman Sachs International	2/28/22	USD	8,948,193	JPY	1,020,000,000	$	77,396

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Ultra Bond	3/22/22		28	$	5,421,578	$	97,922
Short
U.S. Treasury Note 2 Year	3/31/22		13	$	(2,840,529)	$	4,295

Centrally Cleared Interest Rate Swaps
Paid by the Fund		Received by the Fund
Rate/ Reference	Frequency	Rate/ Reference		Frequency		Termination Date		Notional Amount		Value		Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
3-Month USD LIBOR BBA	Quarterly		Fixed 1.073%		Semi-Annually		7/24/25	USD	10,155,000	$	(103,987)	$	—	$	(103,987)
3-Month USD LIBOR BBA	Quarterly		Fixed 1.026%		Semi-Annually		7/24/25	USD	20,310,000		(226,578)		—		(226,578)
3-Month USD LIBOR BBA	Quarterly		Fixed 1.034%		Semi-Annually		7/24/25	USD	15,025,000		(165,277)		—		(165,277)
3-Month USD LIBOR BBA	Quarterly		Fixed 1.390%		Semi-Annually		9/28/25	USD	25,970,000		(115,019)		—		(115,019)
3-Month USD LIBOR BBA	Quarterly		Fixed 1.688%		Semi-Annually		12/07/25	USD	22,425,000		25,134		—		25,134
Fixed 1.808%	Semi-Annually		3-Month USD LIBOR BBA		Quarterly		7/24/53	USD	850,000		(5,663)		—		(5,663)
Fixed 1.785%	Semi-Annually		3-Month USD LIBOR BBA		Quarterly		7/24/53	USD	1,250,000		(1,657)		—		(1,657)
Fixed 1.773%	Semi-Annually		3-Month USD LIBOR BBA		Quarterly		7/24/53	USD	1,700,000		2,786		—		2,786
Fixed 1.870%	Semi-Annually		3-Month USD LIBOR BBA		Quarterly		9/28/53	USD	2,215,000		(47,357)		—		(47,357)
Fixed 1.743%	Semi-Annually		3-Month USD LIBOR BBA		Quarterly		12/07/53	USD	1,875,000		16,340		—		16,340
										$	(621,278)	$	—	$	(621,278)

## Exercise Rate.

Currency Legend

JPY Japanese Yen

USD U.S. Dollar

MassMutual Strategic Bond Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 69.6%
BANK LOANS — 4.1%
Advertising — 0.1%
Terrier Media Buyer, Inc., 2021 Term Loan, 1 mo. USD LIBOR + 3.500%
3.604% VRN 12/17/26	$	440,898	$	438,583
Airlines — 0.1%
United Airlines, Inc., 2021 Term Loan B, 3 mo. USD LIBOR + 3.750%
4.500% VRN 4/21/28		487,425		488,088
Auto Parts & Equipment — 0.1%
Clarios Global LP, 2021 USD Term Loan B, 1 mo. USD LIBOR + 3.250%
3.354% VRN 4/30/26		380,344		377,776
Beverages — 0.1%
Triton Water Holdings, Inc., Term Loan, 3 mo. USD LIBOR + 3.500%
4.000% VRN 3/31/28		487,660		481,896
Building Materials — 0.1%
Quikrete Holdings, Inc., 2021 Term Loan B1,
0.000% 6/11/28 (a)		290,000		289,194
Chemicals — 0.1%
INEOS Styrolution US Holding LLC, 2021 USD Term Loan B, 1 mo. USD LIBOR + 2.750%
3.250% VRN 1/29/26		328,350		327,188
Commercial Services — 0.2%
API Group DE, Inc., Term Loan B, 1 mo. USD LIBOR + 2.500%
2.601% VRN 10/01/26		491,803		491,065
Prime Security Services Borrower LLC, 2021 Term Loan, 1 mo. USD LIBOR + 2.750%, 6 mo. USD LIBOR + 2.750%, 12 mo. USD LIBOR + 2.750%
3.500% VRN 9/23/26		486,297		485,577
Verscend Holding Corp., 2021 Term Loan B, 1 mo. USD LIBOR + 4.000%
4.104% VRN 8/27/25		506,282		505,650
				1,482,292
Computers — 0.2%
Magenta Buyer LLC, 2021 USD 1st Lien Term Loan, 3 mo. USD LIBOR + 5.000%
5.750% VRN 7/27/28		488,775		487,094
Peraton Corp., Term Loan B, 1 mo. USD LIBOR + 3.750%
4.500% VRN 2/01/28		485,554		485,379
				972,473
Diversified Financial Services — 0.5%
AllSpring Buyer LLC, Term Loan B, 3 mo. USD LIBOR + 3.250%
3.750% VRN 11/01/28		332,000		332,690

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Avolon TLB Borrower 1 (US) LLC, 2021 Term Loan B5, 1 mo. USD LIBOR + 2.250%
2.750% VRN 12/01/27	$	88,575	$	88,631
Castlelake Aviation Ltd., Term Loan B, 3 mo. USD LIBOR + 2.750%
3.250% VRN 10/22/26		389,025		386,959
Citadel Securities LP, 2021 Term Loan B, 1 mo. USD LIBOR + 2.500%
2.604% VRN 2/02/28		452,837		449,663
Deerfield Dakota Holding LLC, 2020 USD Term Loan B, 1 mo. USD LIBOR + 3.750%
4.750% VRN 4/09/27		491,104		491,335
Focus Financial Partners LLC, 2020 Term Loan, 1 mo. USD LIBOR + 2.000%
2.104% VRN 7/03/24		390,715		387,054
Hudson River Trading LLC, 2021 Term Loan, 1 mo. USD LIBOR + 3.000%
3.104% VRN 3/20/28		307,675		305,094
Jane Street Group LLC, 2021 Term Loan, 1 mo. USD LIBOR + 2.750%
2.854% VRN 1/26/28		350,987		347,990
				2,789,416
Entertainment — 0.1%
PCI Gaming Authority, Term Loan, 1 mo. USD LIBOR + 2.500%
2.604% VRN 5/29/26		258,892		257,557
Scientific Games International, Inc., 2018 Term Loan B5, 1 mo. USD LIBOR + 2.750%
2.854% VRN 8/14/24		300,089		298,822
				556,379
Food — 0.1%
Froneri International Ltd., 2020 USD Term Loan, 1 mo. USD LIBOR + 2.250%
2.354% VRN 1/29/27		305,350		301,014
US Foods, Inc., 2019 Term Loan B, 1 mo. USD LIBOR + 2.000%
2.104% VRN 9/13/26		431,983		426,799
				727,813
Food Services — 0.1%
Ali Group S.R.L., 2021 Term Loan B,
0.000% 10/12/28 (a)		290,000		287,987
Health Care – Products — 0.1%
Medline Borrower LP, USD Term Loan B, 1 mo. USD LIBOR + 3.250%
3.750% VRN 10/23/28		330,000		329,855
Sotera Health Holdings LLC, 2021 Term Loan, 3 mo. USD LIBOR + 2.750%
3.250% VRN 12/11/26		490,000		487,702
				817,557
Health Care – Services — 0.2%
Global Medical Response, Inc., 2020 Term Loan B, 3 mo. USD LIBOR + 4.750%
4.250% VRN 10/02/25		385,913		383,887
Phoenix Guarantor, Inc., 2020 Term Loan B, 1 mo. USD LIBOR + 3.250%
3.354% VRN 3/05/26		492,427		488,734
RegionalCare Hospital Partners Holdings, Inc., 2018 Term Loan B, 1 mo. USD LIBOR + 3.750%
3.852% VRN 11/16/25		215,677		215,274
				1,087,895

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Insurance — 0.2%
AmWINS Group, Inc., 2021 Term Loan B, 1 mo. USD LIBOR + 2.250%
3.000% VRN 2/19/28	$	306,901	$	304,344
Asurion LLC
2018 Term Loan B7, 1 mo. USD LIBOR + 3.000%
3.104% VRN 11/03/24		339,887		338,126
2020 Term Loan B8, 1 mo. USD LIBOR + 3.250%
3.354% VRN 12/23/26		414,594		411,485
				1,053,955
Leisure Time — 0.1%
Alterra Mountain Co, 2021 Series B-2 Consenting Term Loan, 1 mo. USD LIBOR + 3.500%
4.000% VRN 8/17/28		369,478		368,554
Lodging — 0.4%
Caesars Resort Collection LLC, 2017 1st Lien Term Loan B, 1 mo. USD LIBOR + 2.750%
2.851% VRN 12/23/24		495,041		491,947
Four Seasons Hotels Ltd., New 1st Lien Term Loan, 1 mo. USD LIBOR + 2.000%
2.104% VRN 11/30/23		403,559		401,541
Golden Nugget, Inc., 2017 Incremental Term Loan B, 2 mo. USD LIBOR + 2.500%, 3 mo. USD LIBOR + 2.500%
3.250% VRN 10/04/23		347,912		345,459
Hilton Worldwide Finance LLC, 2019 Term Loan B2, 1 mo. USD LIBOR + 1.750%
1.852% VRN 6/22/26		496,204		491,704
Station Casinos LLC, 2020 Term Loan B, 1 mo. USD LIBOR + 2.250%
2.500% VRN 2/08/27		466,294		461,948
				2,192,599
Media — 0.2%
iHeartCommunications, Inc., 2020 Term Loan, 1 mo. USD LIBOR + 3.000%
3.104% VRN 5/01/26		495,927		492,297
Nexstar Broadcasting, Inc., 2019 Term Loan B4, 3 mo. USD LIBOR + 2.500%
2.599% VRN 9/18/26		492,275		490,862
Virgin Media Bristol LLC, USD Term Loan N, 3 mo. USD LIBOR + 2.500%
2.610% VRN 1/31/28		493,954		489,118
				1,472,277
Packaging & Containers — 0.1%
Berry Global, Inc., 2021 Term Loan Z, 2 mo. USD LIBOR + 1.750%
1.864% VRN 7/01/26		461,100		457,757
Pharmaceuticals — 0.4%
Bausch Health Cos., Inc.
Term Loan B, 1 mo. USD LIBOR + 2.750%
2.854% VRN 11/27/25		220,424		219,000
2018 Term Loan B, 1 mo. USD LIBOR + 3.000%
3.104% VRN 6/02/25		241,230		239,964
Change Healthcare Holdings LLC, 2017 Term Loan B, 1 mo. USD LIBOR + 2.500%
3.500% FRN 3/01/24		468,015		467,481

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Grifols Worldwide Operations USA, Inc., USD 2019 Term Loan B, 1 mo. USD LIBOR + 2.000%
2.104% VRN 11/15/27	$	467,795	$	460,778
Horizon Therapeutics USA, Inc., 2021 Term Loan B2, 1 mo. USD LIBOR + 1.750%
2.250% VRN 3/15/28		477,600		475,551
Jazz Financing Lux S.a.r.l., USD Term Loan, 1 mo. USD LIBOR + 3.500%
4.000% VRN 5/05/28		487,550		489,105
				2,351,879
Retail — 0.2%
1011778 B.C. Unlimited Liability Co., Term Loan B4, 1 mo. USD LIBOR + 1.750%
1.854% VRN 11/19/26		499,719		492,223
Harbor Freight Tools USA, Inc., 2021 Term Loan B, 1 mo. USD LIBOR + 2.750%
3.250% VRN 10/19/27		376,374		375,252
Michaels Cos., Inc., 2021 Term Loan B, 3 mo. USD LIBOR + 4.250%
5.000% VRN 4/15/28		59,600		59,015
Pilot Travel Centers LLC, 2021 Term Loan B, 1 mo. USD LIBOR + 2.000%
2.104% FRN 8/04/28		500,000		496,605
				1,423,095
Semiconductors — 0.0%
II-VI, Inc., 2021 Bridge Term Loan B,
0.000% 12/01/28 (a)		160,000		159,600
Software — 0.2%
Athenahealth, Inc., 2021 Term Loan B1, 3 mo. USD LIBOR + 4.250%
4.400% VRN 2/11/26		129,328		129,199
Cloudera, Inc., 2021 Term Loan, 1 mo. USD LIBOR + 3.750%
4.250% VRN 10/08/28		200,000		199,250
DCert Buyer, Inc., 2019 Term Loan B, 1 mo. USD LIBOR + 4.000%
4.104% VRN 10/16/26		237,849		237,228
Rackspace Technology Global, Inc., 2021 Term Loan, 3 mo. USD LIBOR + 2.750%
3.500% VRN 2/15/28		446,625		442,931
				1,008,608
Telecommunications — 0.1%
Level 3 Financing, Inc., 2019 Term Loan B, 1 mo. USD LIBOR + 1.750%
1.854% VRN 3/01/27		498,362		491,509
Zayo Group Holdings, Inc., USD Term Loan, 1 mo. USD LIBOR + 3.000%
3.104% VRN 3/09/27		430,000		423,907
				915,416
Transportation — 0.1%
Genesee & Wyoming, Inc., Term Loan, 3 mo. USD LIBOR + 2.000%
2.224% VRN 12/30/26		498,822		495,415
TOTAL BANK LOANS (Cost $23,098,779)				23,023,692
CORPORATE DEBT — 29.9%
Aerospace & Defense — 1.6%
The Boeing Co.

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
2.196% 2/04/26	$	230,000	$	230,009
2.700% 2/01/27		90,000		91,566
2.800% 3/01/27		150,000		153,135
3.100% 5/01/26		80,000		83,396
3.200% 3/01/29		290,000		298,717
3.250% 2/01/35		360,000		363,274
3.550% 3/01/38		80,000		81,547
3.750% 2/01/50		240,000		250,329
3.950% 8/01/59		860,000		896,913
5.150% 5/01/30		160,000		186,589
5.705% 5/01/40		770,000		991,351
5.805% 5/01/50		1,710,000		2,323,043
5.930% 5/01/60		910,000		1,267,497
General Dynamics Corp.
3.500% 5/15/25		50,000		53,325
4.250% 4/01/40		20,000		24,484
4.250% 4/01/50		60,000		76,792
L3Harris Technologies, Inc.
5.054% 4/27/45		50,000		65,736
Lockheed Martin Corp.
3.550% 1/15/26		90,000		97,470
4.500% 5/15/36		60,000		73,328
Northrop Grumman Corp.
2.930% 1/15/25		160,000		166,732
3.250% 1/15/28		290,000		310,598
5.250% 5/01/50		160,000		224,871
Raytheon Technologies Corp.
2.250% 7/01/30		110,000		109,804
4.125% 11/16/28		160,000		179,111
4.500% 6/01/42		80,000		99,703
				8,699,320
Agriculture — 0.3%
Altria Group, Inc.
2.450% 2/04/32		140,000		133,080
4.400% 2/14/26		192,000		211,315
5.800% 2/14/39		240,000		289,116
5.950% 2/14/49		120,000		150,204
6.200% 2/14/59		56,000		73,247
BAT Capital Corp.
3.557% 8/15/27		170,000		178,411
4.540% 8/15/47		250,000		262,269
Cargill, Inc.
1.375% 7/23/23 (b)		180,000		181,427
Philip Morris International, Inc.
1.125% 5/01/23		190,000		190,837
2.100% 5/01/30		40,000		39,182
4.500% 3/20/42		80,000		93,034
Reynolds American, Inc.
5.850% 8/15/45		110,000		134,029
				1,936,151
Airlines — 1.2%
Delta Air Lines, Inc.
3.625% 3/15/22		250,000		250,002
3.800% 4/19/23		90,000		92,023
2.900% 10/28/24		180,000		183,561

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
7.000% 5/01/25 (b)	$	1,670,000	$	1,910,252
7.375% 1/15/26		380,000		447,321
Delta Air Lines, Inc./SkyMiles IP Ltd.
4.500% 10/20/25 (b)		320,000		336,425
4.750% 10/20/28 (b)		2,410,000		2,633,342
Mileage Plus Holdings LLC / Mileage Plus Intellectual Property Assets Ltd.
6.500% 6/20/27 (b)		330,000		352,275
Spirit Loyalty Cayman Ltd. / Spirit IP Cayman Ltd.
8.000% 9/20/25 (b)		240,000		264,473
United Airlines, Inc.
4.375% 4/15/26 (b)		10,000		10,427
4.625% 4/15/29 (b)		270,000		278,438
				6,758,539
Apparel — 0.1%
NIKE, Inc.
2.850% 3/27/30		280,000		297,938
3.250% 3/27/40		130,000		141,801
3.375% 3/27/50		40,000		45,388
				485,127
Auto Manufacturers — 0.6%
Ford Motor Co.
4.750% 1/15/43		90,000		99,337
Ford Motor Credit Co. LLC
2.900% 2/16/28		390,000		390,975
3.339% 3/28/22		370,000		370,647
3.625% 6/17/31		220,000		230,909
4.000% 11/13/30		200,000		215,160
4.125% 8/17/27		200,000		215,876
5.125% 6/16/25		200,000		217,500
General Motors Co.
5.150% 4/01/38		40,000		48,317
5.400% 10/02/23		130,000		139,161
5.950% 4/01/49		110,000		151,039
6.125% 10/01/25		20,000		22,985
General Motors Financial Co., Inc.
4.250% 5/15/23		10,000		10,408
Nissan Motor Co. Ltd.
3.043% 9/15/23 (b)		200,000		205,238
3.522% 9/17/25 (b)		410,000		429,946
4.345% 9/17/27 (b)		300,000		324,075
				3,071,573
Banks — 8.5%
ABN AMRO Bank NV
4.750% 7/28/25 (b)		260,000		283,100
Banco Santander SA
3 mo. USD LIBOR + 1.120% 1.241% FRN 4/12/23		200,000		202,024
2.746% 5/28/25		600,000		620,419
Bank of America Corp.
SOFR + 1.210% 2.572% VRN 10/20/32		60,000		60,360
SOFR + 2.150% 2.592% VRN 4/29/31		360,000		364,036
3 mo. USD LIBOR + 1.040% 3.419% VRN 12/20/28		570,000		609,002
3 mo. USD LIBOR + 1.370% 3.593% VRN 7/21/28		270,000		290,789
3 mo. USD LIBOR + 1.070% 3.970% VRN 3/05/29		600,000		657,428

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3 mo. USD LIBOR + 1.210% 3.974% VRN 2/07/30	$	270,000	$	297,669
4.000% 4/01/24		270,000		287,073
4.000% 1/22/25		270,000		288,447
3 mo. USD LIBOR + 3.150% 4.083% VRN 3/20/51		480,000		578,716
4.200% 8/26/24		380,000		407,404
4.250% 10/22/26		50,000		55,203
3 mo. USD LIBOR + 1.520% 4.330% VRN 3/15/50		90,000		111,732
4.450% 3/03/26		50,000		55,075
5.000% 1/21/44		130,000		171,204
3 mo. USD LIBOR + 3.705% 6.250% VRN (c)		170,000		182,963
Bank of Montreal
SOFR + .680% 0.730% FRN 3/10/23		4,090,000		4,109,505
1.850% 5/01/25		70,000		71,064
5 year USD Swap + 1.432% 3.803% VRN 12/15/32		90,000		96,601
The Bank of New York Mellon Corp.
1.600% 4/24/25		170,000		171,632
The Bank of Nova Scotia
SOFR + .550% 0.600% FRN 9/15/23		4,820,000		4,834,799
1.300% 6/11/25		120,000		119,356
Barclays Bank PLC
1.700% 5/12/22		240,000		240,814
Barclays PLC 3 mo. USD LIBOR + 3.054%
5.088% VRN 6/20/30		510,000		579,011
BNP Paribas SA
SOFR + 2.074% 2.219% VRN 6/09/26 (b)		200,000		201,948
5 year USD Swap + 1.483% 4.375% VRN 3/01/33 (b)		220,000		238,804
4.400% 8/14/28 (b)		400,000		448,648
4.625% 3/13/27 (b)		260,000		288,372
Canadian Imperial Bank of Commerce
SOFR + .800% 0.850% FRN 3/17/23		3,360,000		3,377,290
0.950% 6/23/23		120,000		120,157
Citigroup, Inc.
SOFR + 2.107% 2.572% VRN 6/03/31		170,000		171,648
3 mo. USD LIBOR + 1.338% 3.980% VRN 3/20/30		180,000		198,874
4.125% 7/25/28		150,000		164,729
4.300% 11/20/26		670,000		741,705
SOFR + 3.914% 4.412% VRN 3/31/31		410,000		468,697
4.450% 9/29/27		480,000		535,531
4.650% 7/30/45		181,000		228,952
4.650% 7/23/48		70,000		90,190
4.750% 5/18/46		40,000		49,343
5.300% 5/06/44		16,000		20,939
3 mo. USD LIBOR + 3.905% 5.950% VRN (c)		320,000		342,400
3 mo. USD LIBOR + 4.068% 5.950% VRN (c)		50,000		51,500
3 mo. USD LIBOR + 3.423% 6.300% VRN (c)		60,000		62,888
6.625% 6/15/32		20,000		26,565
8.125% 7/15/39		50,000		84,725
Commonwealth Bank of Australia SOFR + .400%
0.449% FRN 7/07/25 (b)		4,840,000		4,840,001
Cooperatieve Rabobank UA
4.375% 8/04/25		470,000		509,371
Credit Agricole SA SOFR + 1.676%
1.907% VRN 6/16/26 (b)		270,000		270,637
Credit Suisse Group AG
SOFR + 2.044% 2.193% VRN 6/05/26 (b)		480,000		482,891
SOFR + 1.730% 3.091% VRN 5/14/32 (b)		350,000		356,540
SOFR + 3.730% 4.194% VRN 4/01/31 (b)		250,000		275,977

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Danske Bank A/S
5.375% 1/12/24 (b)	$	240,000	$	258,390
Goldman Sachs Capital II 3 mo. USD LIBOR + .768%
4.000% VRN (c)		8,000		7,840
The Goldman Sachs Group, Inc.
SOFR + 1.472% 2.908% VRN 7/21/42		80,000		79,770
SOFR + 1.513% 3.210% VRN 4/22/42		40,000		41,602
3.500% 4/01/25		370,000		391,375
3.500% 11/16/26		200,000		213,242
3 mo. USD LIBOR + 1.510% 3.691% VRN 6/05/28		140,000		150,856
3.850% 7/08/24		90,000		95,139
4.000% 3/03/24		100,000		106,036
3 mo. USD LIBOR + 1.301% 4.223% VRN 5/01/29		490,000		544,725
4.250% 10/21/25		260,000		283,660
4.750% 10/21/45		130,000		167,845
5.150% 5/22/45		290,000		378,055
6.250% 2/01/41		130,000		189,458
6.750% 10/01/37		80,000		113,662
HSBC Holdings PLC
SOFR + 1.929% 2.099% VRN 6/04/26		510,000		513,527
4.250% 8/18/25		330,000		354,967
Intesa Sanpaolo SpA
3.375% 1/12/23 (b)		350,000		357,633
5.017% 6/26/24 (b)		900,000		964,557
5.710% 1/15/26 (b)		200,000		221,292
JP Morgan Chase & Co.
SOFR + 1.850% 2.083% VRN 4/22/26		340,000		345,234
SOFR + 2.040% 2.522% VRN 4/22/31		300,000		303,531
SOFR + 2.440% 3.109% VRN 4/22/51		80,000		82,975
3 mo. USD LIBOR + .945% 3.509% VRN 1/23/29		70,000		75,043
3.875% 9/10/24		300,000		318,286
3 mo. USD LIBOR + 1.260% 4.203% VRN 7/23/29		310,000		347,052
4.250% 10/01/27		70,000		78,577
3 mo. USD LIBOR + 1.330% 4.452% VRN 12/05/29		550,000		624,710
4.950% 6/01/45		140,000		182,770
JPMorgan Chase & Co. SOFR + 1.180%
2.545% VRN 11/08/32		160,000		161,299
Lloyds Banking Group PLC
4.550% 8/16/28		370,000		421,149
Mitsubishi UFJ Financial Group, Inc.
2.998% 2/22/22		60,000		60,213
Morgan Stanley
SOFR + 1.143% 2.699% VRN 1/22/31		10,000		10,241
SOFR + 3.120% 3.622% VRN 4/01/31		750,000		818,077
3 mo. USD LIBOR + 1.140% 3.772% VRN 1/24/29		350,000		381,147
3 mo. USD LIBOR + 1.628% 4.431% VRN 1/23/30		10,000		11,405
National Securities Clearing Corp.
1.500% 4/23/25 (b)		250,000		251,604
Natwest Group PLC 3 mo. USD LIBOR + 1.550%
4.519% VRN 6/25/24		200,000		209,261
Royal Bank of Canada
1.150% 6/10/25		310,000		307,457
1.600% 4/17/23		30,000		30,339
Santander Holdings USA, Inc.
4.500% 7/17/25		50,000		54,149
The Toronto-Dominion Bank
1.150% 6/12/25		300,000		297,608
UBS Group AG

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
4.253% 3/23/28 (b)	$	340,000	$	376,767
5 year USD Swap + 4.344% 7.000% VRN (b) (c)		500,000		539,125
UniCredit SpA
6.572% 1/14/22 (b)		640,000		640,928
US Bancorp
1.450% 5/12/25		280,000		281,271
Wells Fargo & Co.
SOFR + 2.000% 2.188% VRN 4/30/26		200,000		203,618
SOFR + 2.100% 2.393% VRN 6/02/28		230,000		233,911
SOFR + 1.432% 2.879% VRN 10/30/30		150,000		156,089
3.000% 10/23/26		350,000		367,924
4.300% 7/22/27		370,000		412,477
4.400% 6/14/46		180,000		214,012
SOFR + 4.032% 4.478% VRN 4/04/31		210,000		244,197
4.650% 11/04/44		80,000		97,141
4.750% 12/07/46		10,000		12,521
4.900% 11/17/45		250,000		315,352
SOFR + 4.502% 5.013% VRN 4/04/51		1,350,000		1,849,926
5.375% 11/02/43		110,000		145,790
3 mo. USD LIBOR + 3.990% 5.875% VRN (c)		50,000		54,625
				47,346,180
Beverages — 0.4%
Anheuser-Busch Cos. LLC/Anheuser-Busch InBev Worldwide, Inc.
3.650% 2/01/26		320,000		343,732
4.900% 2/01/46		50,000		63,393
Anheuser-Busch InBev Worldwide, Inc.
3.500% 6/01/30		130,000		142,627
4.000% 4/13/28		80,000		89,050
4.350% 6/01/40		30,000		35,350
4.500% 6/01/50		360,000		445,375
4.750% 1/23/29		230,000		267,923
5.550% 1/23/49		80,000		111,036
The Coca-Cola Co.
1.450% 6/01/27		250,000		248,705
2.500% 6/01/40		10,000		10,067
2.600% 6/01/50		80,000		78,430
Molson Coors Beverage Co.
3.000% 7/15/26		50,000		52,365
3.500% 5/01/22		20,000		20,165
4.200% 7/15/46		50,000		55,600
PepsiCo, Inc.
1.625% 5/01/30		170,000		165,035
				2,128,853
Biotechnology — 0.0%
Amgen, Inc.
4.663% 6/15/51		24,000		30,812
Gilead Sciences, Inc.
3.700% 4/01/24		130,000		136,675
4.500% 2/01/45		10,000		12,229
4.750% 3/01/46		40,000		50,844
				230,560

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Building Materials — 0.0%
Carrier Global Corp.
3.577% 4/05/50	$	20,000	$	21,343
Chemicals — 0.2%
Equate Petrochemical BV
4.250% 11/03/26 (b)		230,000		249,869
OCP SA
3.750% 6/23/31 (b)		260,000		252,304
5.125% 6/23/51 (b)		220,000		207,508
Orbia Advance Corp. SAB de CV
2.875% 5/11/31 (b)		490,000		478,975
				1,188,656
Commercial Services — 0.2%
Cintas Corp. No 2
2.900% 4/01/22		100,000		100,402
3.700% 4/01/27		160,000		175,145
DP World Ltd.
5.625% 9/25/48 (b)		330,000		404,860
PayPal Holdings, Inc.
1.650% 6/01/25		270,000		273,416
United Rentals North America, Inc.
3.875% 11/15/27		60,000		62,171
				1,015,994
Computers — 1.0%
Apple, Inc.
2.450% 8/04/26		480,000		501,536
Dell International LLC/EMC Corp.
5.300% 10/01/29		4,090,000		4,798,438
International Business Machines Corp.
3.000% 5/15/24		320,000		334,335
				5,634,309
Cosmetics & Personal Care — 0.0%
The Procter & Gamble Co.
3.000% 3/25/30		100,000		108,798
Diversified Financial Services — 0.6%
AerCap Ireland Capital DAC / AerCap Global Aviation Trust
2.450% 10/29/26		170,000		171,506
3.000% 10/29/28		160,000		162,401
3.150% 2/15/24		190,000		195,985
3.300% 1/30/32		160,000		163,329
Air Lease Corp.
3.375% 7/01/25		80,000		83,509
Blue Owl Finance LLC
3.125% 6/10/31 (b)		1,610,000		1,577,248
ILFC E-Capital Trust II
3.670% VRN 12/21/65 (b) (d)		10,000		8,525
International Lease Finance Corp.
5.875% 8/15/22		70,000		72,160
KKR Group Finance Co. II LLC
5.500% 2/01/43 (b)		20,000		26,775

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Mastercard, Inc.
3.850% 3/26/50	$	50,000	$	60,313
Park Aerospace Holdings Ltd.
4.500% 3/15/23 (b)		10,000		10,321
5.250% 8/15/22 (b)		16,000		16,351
5.500% 2/15/24 (b)		50,000		53,625
Vanguard Group, Inc.
3.050% 8/22/50		450,000		440,051
Visa, Inc.
3.150% 12/14/25		200,000		213,263
4.300% 12/14/45		160,000		201,991
				3,457,353
Electric — 1.1%
The AES Corp.
3.950% 7/15/30 (b)		2,080,000		2,216,032
AES Panama Generation Holdings SRL
4.375% 5/31/30 (b)		1,730,000		1,801,380
American Transmission Systems, Inc.
2.650% 1/15/32 (b)		400,000		404,190
Consolidated Edison Co. of New York, Inc.
3.350% 4/01/30		70,000		75,352
3.950% 4/01/50		50,000		57,326
Duke Energy Ohio, Inc.
3.650% 2/01/29		260,000		281,308
Exelon Corp.
5.625% 6/15/35		40,000		50,930
FirstEnergy Corp.
7.375% 11/15/31		460,000		620,724
Pacific Gas and Electric Co.
1.750% 6/16/22		450,000		450,001
2.100% 8/01/27		140,000		135,255
2.500% 2/01/31		40,000		38,123
3.300% 8/01/40		50,000		46,478
3.500% 8/01/50		80,000		74,363
				6,251,462
Electronics — 0.0%
Honeywell International, Inc.
1.350% 6/01/25		80,000		80,354
Environmental Controls — 0.0%
Republic Services, Inc.
2.500% 8/15/24		230,000		236,732
Food — 0.2%
Danone SA
2.589% 11/02/23 (b)		310,000		317,850
The Hershey Co.
0.900% 6/01/25		50,000		49,359
Mars, Inc.
2.700% 4/01/25 (b)		140,000		145,638
3.200% 4/01/30 (b)		80,000		86,233
Mondelez International, Inc.
1.500% 5/04/25		390,000		390,523
				989,603

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Forest Products & Paper — 0.1%
Suzano Austria GmbH
3.125% 1/15/32	$	80,000	$	77,401
3.750% 1/15/31		430,000		436,992
				514,393
Health Care – Products — 0.1%
Abbott Laboratories
3.750% 11/30/26		139,000		153,687
4.750% 11/30/36		80,000		102,244
4.900% 11/30/46		100,000		137,164
Medtronic, Inc.
3.500% 3/15/25		86,000		91,599
4.625% 3/15/45		18,000		23,648
				508,342
Health Care – Services — 0.3%
Aetna, Inc.
2.800% 6/15/23		40,000		40,988
Anthem, Inc.
3.350% 12/01/24		120,000		126,797
3.650% 12/01/27		140,000		153,692
CommonSpirit Health
4.350% 11/01/42		20,000		23,012
Fresenius Medical Care US Finance II, Inc.
4.750% 10/15/24 (b)		70,000		75,446
5.875% 1/31/22 (b)		50,000		50,177
HCA, Inc.
4.500% 2/15/27		40,000		44,089
4.750% 5/01/23		150,000		157,118
5.000% 3/15/24		50,000		53,773
5.250% 6/15/26		60,000		67,506
5.500% 6/15/47		80,000		105,006
Humana, Inc.
4.500% 4/01/25		50,000		54,510
4.625% 12/01/42		70,000		86,404
4.800% 3/15/47		10,000		12,708
UnitedHealth Group, Inc.
1.250% 1/15/26		110,000		109,636
2.000% 5/15/30		100,000		99,382
3.125% 5/15/60		30,000		31,118
3.875% 12/15/28		110,000		123,384
3.875% 8/15/59		90,000		108,175
4.250% 6/15/48		110,000		136,729
4.450% 12/15/48		50,000		64,029
5.800% 3/15/36		70,000		97,265
				1,820,944
Home Builders — 0.1%
Lennar Corp.
4.500% 4/30/24		100,000		106,230
4.750% 11/29/27		40,000		45,296
MDC Holdings, Inc.
6.000% 1/15/43		20,000		25,300

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
NVR, Inc.
3.950% 9/15/22	$	100,000	$	101,570
				278,396
Insurance — 0.9%
Ambac Assurance Corp.
5.100% (b) (c)		4,362		5,875
Athene Global Funding SOFR + .700%
0.750% FRN 5/24/24 (b)		3,860,000		3,867,711
Berkshire Hathaway Finance Corp.
4.250% 1/15/49		160,000		197,148
Brighthouse Financial, Inc.
4.700% 6/22/47		11,000		12,110
Chubb INA Holdings, Inc.
3.350% 5/03/26		120,000		128,720
Guardian Life Global Funding
1.100% 6/23/25 (b)		120,000		118,906
MetLife Capital Trust IV
7.875% 12/15/67 (b)		200,000		273,000
New York Life Global Funding
0.950% 6/24/25 (b)		100,000		98,578
Principal Life Global Funding II
1.250% 6/23/25 (b)		110,000		108,739
Teachers Insurance & Annuity Association of America
4.900% 9/15/44 (b)		50,000		64,375
6.850% 12/16/39 (b)		22,000		32,898
				4,908,060
Internet — 0.6%
Alphabet, Inc.
0.450% 8/15/25		50,000		48,871
0.800% 8/15/27		90,000		87,210
2.050% 8/15/50		160,000		143,407
Amazon.com, Inc.
2.100% 5/12/31		80,000		81,153
2.500% 6/03/50		60,000		57,363
3.150% 8/22/27		470,000		507,942
4.050% 8/22/47		100,000		121,660
4.250% 8/22/57		70,000		90,001
4.950% 12/05/44		180,000		246,406
Prosus NV
3.061% 7/13/31 (b)		570,000		556,250
3.832% 2/08/51 (b)		210,000		196,543
4.027% 8/03/50 (b)		310,000		298,712
Tencent Holdings Ltd.
3.680% 4/22/41 (b)		210,000		218,355
3.840% 4/22/51 (b)		520,000		547,742
				3,201,615
Investment Companies — 0.3%
Golub Capital BDC, Inc.
2.500% 8/24/26		1,870,000		1,838,841
Iron & Steel — 0.1%
ArcelorMittal SA
7.000% STEP 10/15/39		60,000		82,661

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Vale Overseas Ltd.
6.875% 11/21/36	$	174,000	$	231,204
				313,865
Leisure Time — 0.0%
VOC Escrow Ltd.
5.000% 2/15/28 (b)		210,000		207,900
Lodging — 0.3%
Las Vegas Sands Corp.
2.900% 6/25/25		100,000		99,769
3.200% 8/08/24		630,000		641,523
Sands China Ltd.
3.800% 1/08/26		280,000		281,439
5.125% 8/08/25		750,000		786,795
				1,809,526
Machinery – Diversified — 0.1%
Deere & Co.
3.100% 4/15/30		60,000		64,728
3.750% 4/15/50		260,000		308,235
Otis Worldwide Corp.
2.056% 4/05/25		140,000		142,385
				515,348
Media — 0.8%
CCO Holdings LLC/CCO Holdings Capital Corp.
4.500% 8/15/30 (b)		30,000		30,696
4.500% 5/01/32		830,000		853,862
Charter Communications Operating LLC/Charter Communications Operating Capital
3.500% 3/01/42		60,000		58,358
4.200% 3/15/28		190,000		208,121
4.800% 3/01/50		100,000		112,331
4.908% 7/23/25		270,000		297,137
5.050% 3/30/29		360,000		412,469
5.375% 4/01/38		100,000		119,289
6.484% 10/23/45		160,000		219,106
6.834% 10/23/55		60,000		86,091
Comcast Corp.
2.887% 11/01/51 (b)		260,000		252,452
3.150% 3/01/26		280,000		298,670
3.250% 11/01/39		30,000		31,735
3.300% 4/01/27		120,000		129,059
3.400% 4/01/30		180,000		196,643
3.400% 7/15/46		30,000		31,888
3.750% 4/01/40		40,000		44,898
4.000% 3/01/48		50,000		57,792
4.150% 10/15/28		180,000		204,504
4.250% 10/15/30		190,000		219,493
4.250% 1/15/33		20,000		23,438
6.500% 11/15/35		41,000		58,959
DISH DBS Corp.
5.250% 12/01/26 (b)		50,000		50,770
Fox Corp.
5.476% 1/25/39		90,000		116,337
Time Warner Cable, Inc.

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
6.550% 5/01/37	$	10,000	$	13,110
6.750% 6/15/39		120,000		163,860
7.300% 7/01/38		100,000		141,833
Time Warner Entertainment Co. LP
8.375% 7/15/33		20,000		29,153
ViacomCBS, Inc.
3.875% 4/01/24		30,000		31,593
The Walt Disney Co.
6.200% 12/15/34		20,000		27,975
6.650% 11/15/37		50,000		74,260
				4,595,882
Mining — 0.5%
Anglo American Capital PLC
4.750% 4/10/27 (b)		230,000		255,952
Barrick Gold Corp.
5.250% 4/01/42		20,000		26,006
Barrick North America Finance LLC
5.700% 5/30/41		80,000		109,001
5.750% 5/01/43		80,000		108,984
BHP Billiton Finance USA Ltd.
5.000% 9/30/43		100,000		132,622
Freeport-McMoRan, Inc.
4.550% 11/14/24		10,000		10,715
4.625% 8/01/30		120,000		128,700
5.450% 3/15/43		426,000		535,520
Glencore Funding LLC
3.875% 10/27/27 (b)		90,000		96,703
4.000% 3/27/27 (b)		270,000		291,457
4.125% 5/30/23 (b)		130,000		135,190
4.125% 3/12/24 (b)		130,000		136,717
Southern Copper Corp.
5.250% 11/08/42		450,000		566,437
Teck Resources Ltd.
6.000% 8/15/40		20,000		25,641
				2,559,645
Miscellaneous - Manufacturing — 0.2%
3M Co.
2.375% 8/26/29		140,000		143,747
3.050% 4/15/30		60,000		64,399
3.700% 4/15/50		150,000		176,471
Eaton Corp.
2.750% 11/02/22		240,000		244,479
4.150% 11/02/42		40,000		46,893
General Electric Co.
6.750% 3/15/32		114,000		155,636
				831,625
Oil & Gas — 4.2%
Apache Corp.
4.250% 1/15/44		570,000		577,125
4.750% 4/15/43		150,000		165,000
5.100% 9/01/40		120,000		135,600
6.000% 1/15/37		17,000		20,740
BP Capital Markets America, Inc.

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3.000% 2/24/50	$	340,000	$	332,679
3.119% 5/04/26		290,000		306,755
3.588% 4/14/27		100,000		108,061
3.633% 4/06/30		120,000		132,648
BP Capital Markets PLC
3.506% 3/17/25		330,000		351,338
Chevron Corp.
1.995% 5/11/27		110,000		111,719
3.078% 5/11/50		20,000		21,191
Chevron USA, Inc.
3.850% 1/15/28		300,000		332,366
ConocoPhillips
4.300% 8/15/28 (b)		220,000		247,266
ConocoPhillips Co.
6.950% 4/15/29		75,000		98,753
Continental Resources, Inc.
2.268% 11/15/26 (b)		70,000		69,475
4.375% 1/15/28		130,000		140,537
5.750% 1/15/31 (b)		250,000		294,405
Coterra Energy, Inc.
3.900% 5/15/27 (b)		230,000		247,315
4.375% 3/15/29 (b)		220,000		246,029
Devon Energy Corp.
4.750% 5/15/42		10,000		11,609
5.000% 6/15/45		440,000		533,423
5.250% 10/15/27		32,000		33,758
5.600% 7/15/41		140,000		176,041
5.850% 12/15/25		120,000		137,267
5.875% 6/15/28		26,000		28,166
8.250% 8/01/23		30,000		32,769
Diamondback Energy, Inc.
3.250% 12/01/26		10,000		10,552
3.500% 12/01/29		100,000		106,041
Ecopetrol SA
5.875% 5/28/45		770,000		736,320
EOG Resources, Inc.
3.900% 4/01/35		200,000		227,020
4.150% 1/15/26		70,000		76,500
4.375% 4/15/30		60,000		69,400
4.950% 4/15/50		40,000		54,227
EQT Corp.
3.000% 10/01/22		560,000		565,600
3.900% 10/01/27		70,000		75,163
6.625% STEP 2/01/25		20,000		22,550
Exxon Mobil Corp.
2.992% 3/19/25		340,000		357,453
3.043% 3/01/26		130,000		137,594
3.482% 3/19/30		190,000		208,273
4.114% 3/01/46		200,000		234,521
4.327% 3/19/50		20,000		24,644
KazMunayGas National Co. JSC
5.375% 4/24/30 (b)		200,000		233,100
Marathon Oil Corp.
6.600% 10/01/37		4,330,000		5,669,369
Occidental Petroleum Corp.
3.200% 8/15/26		300,000		309,155
4.100% 2/15/47		590,000		578,200
4.200% 3/15/48		120,000		120,000

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
4.400% 4/15/46	$	40,000	$	41,000
4.625% 6/15/45		80,000		83,000
6.450% 9/15/36		240,000		306,000
6.600% 3/15/46		630,000		817,425
7.875% 9/15/31		160,000		213,600
Petrobras Global Finance BV
5.500% 6/10/51		610,000		565,775
5.999% 1/27/28		900,000		981,000
7.375% 1/17/27		260,000		302,640
Petroleos Mexicanos
6.375% 1/23/45		220,000		191,070
6.625% 6/15/35		303,000		291,121
6.875% 8/04/26		160,000		175,920
7.690% 1/23/50		2,470,000		2,383,550
Pioneer Natural Resources Co.
1.125% 1/15/26		40,000		38,868
2.150% 1/15/31		190,000		182,774
Qatar Energy
3.125% 7/12/41 (b)		380,000		384,034
3.300% 7/12/51 (b)		390,000		401,454
Shell International Finance BV
2.750% 4/06/30		160,000		167,286
2.875% 5/10/26		130,000		137,966
3.250% 4/06/50		230,000		245,638
4.000% 5/10/46		180,000		210,027
4.550% 8/12/43		100,000		125,067
Sinopec Group Overseas Development 2014 Ltd.
4.375% 4/10/24 (b)		330,000		352,278
Southwestern Energy Co.
4.750% 2/01/32		50,000		52,636
				23,357,846
Oil & Gas Services — 0.0%
Halliburton Co.
3.800% 11/15/25		5,000		5,377
4.850% 11/15/35		20,000		23,538
5.000% 11/15/45		110,000		131,814
Schlumberger Holdings Corp.
3.900% 5/17/28 (b)		31,000		33,512
				194,241
Packaging & Containers — 0.0%
Ball Corp.
3.125% 9/15/31		100,000		98,750
WestRock RKT LLC
4.000% 3/01/23		30,000		30,805
				129,555
Pharmaceuticals — 1.6%
AbbVie, Inc.
2.600% 11/21/24		550,000		570,837
2.950% 11/21/26		260,000		274,128
3.200% 11/21/29		570,000		610,010
3.600% 5/14/25		130,000		138,282
3.800% 3/15/25		180,000		191,676
4.250% 11/21/49		20,000		23,977

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
4.550% 3/15/35	$	90,000	$	108,520
Becton Dickinson and Co.
3.363% 6/06/24		82,000		85,865
4.685% 12/15/44		20,000		25,172
Bristol-Myers Squibb Co.
2.900% 7/26/24		206,000		215,606
3.200% 6/15/26		310,000		333,510
3.400% 7/26/29		60,000		65,762
3.875% 8/15/25		38,000		41,135
5.000% 8/15/45		146,000		194,546
Cigna Corp.
3.750% 7/15/23		161,000		167,440
4.125% 11/15/25		100,000		109,411
4.375% 10/15/28		740,000		841,677
CVS Health Corp.
2.125% 9/15/31		140,000		137,262
3.750% 4/01/30		150,000		164,610
4.125% 4/01/40		120,000		138,124
4.250% 4/01/50		30,000		36,388
4.300% 3/25/28		578,000		649,100
5.050% 3/25/48		100,000		131,170
5.125% 7/20/45		100,000		130,380
CVS Pass-Through Trust
5.298% 1/11/27 (b)		5,389		5,795
5.880% 1/10/28		66,215		74,929
6.036% 12/10/28		60,231		68,678
6.943% 1/10/30		54,786		64,949
GlaxoSmithKline Capital PLC
2.850% 5/08/22		10,000		10,085
Johnson & Johnson
0.550% 9/01/25		120,000		117,309
0.950% 9/01/27		40,000		39,149
3.625% 3/03/37		320,000		367,998
Merck & Co., Inc.
0.750% 2/24/26		200,000		196,137
1.450% 6/24/30		120,000		115,028
Pfizer, Inc.
0.800% 5/28/25		270,000		266,760
1.700% 5/28/30		280,000		274,602
Teva Pharmaceutical Finance Co. BV
2.950% 12/18/22		110,000		110,125
Teva Pharmaceutical Finance Netherlands III BV
2.800% 7/21/23		420,000		421,455
3.150% 10/01/26		900,000		846,000
6.000% 4/15/24		350,000		366,625
7.125% 1/31/25		390,000		417,300
				9,147,512
Pipelines — 1.3%
Cameron LNG LLC
2.902% 7/15/31 (b)		40,000		41,692
3.302% 1/15/35 (b)		130,000		135,888
Cheniere Energy Partners LP
3.250% 1/31/32 (b)		170,000		171,700
El Paso Natural Gas Co. LLC
8.375% 6/15/32		289,000		414,046
Energy Transfer LP
2.900% 5/15/25		170,000		175,481

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3.750% 5/15/30	$	430,000	$	456,092
4.950% 6/15/28		50,000		56,287
5.250% 4/15/29		80,000		91,707
5.300% 4/01/44		20,000		22,965
6.250% 4/15/49		260,000		340,651
5 year CMT + 5.134% 6.750% VRN (c)		150,000		150,000
Enterprise Products Operating LLC
3.700% 1/31/51		10,000		10,530
4.150% 10/16/28		980,000		1,101,048
5.700% 2/15/42		40,000		52,119
Kinder Morgan Energy Partners LP
5.500% 3/01/44		30,000		36,878
Kinder Morgan, Inc.
4.300% 3/01/28		140,000		155,681
5.200% 3/01/48		20,000		24,781
MPLX LP
4.500% 4/15/38		70,000		78,569
4.700% 4/15/48		210,000		243,089
4.800% 2/15/29		190,000		217,137
4.875% 12/01/24		90,000		97,705
5.500% 2/15/49		100,000		128,104
Southern Natural Gas Co. LLC
8.000% 3/01/32		148,000		206,035
Tennessee Gas Pipeline Co. LLC
2.900% 3/01/30 (b)		170,000		172,844
Transcontinental Gas Pipe Line Co. LLC
7.850% 2/01/26		60,000		73,271
Western Midstream Operating LP
3 mo. USD LIBOR + 2.100% 1.972% FRN 1/13/23		90,000		89,868
4.350% STEP 2/01/25		240,000		250,805
5.300% STEP 2/01/30		900,000		990,918
5.500% 8/15/48		20,000		23,900
6.500% STEP 2/01/50		230,000		271,975
The Williams Cos., Inc.
3.750% 6/15/27		170,000		183,643
7.500% 1/15/31		200,000		270,762
7.750% 6/15/31		350,000		474,189
				7,210,360
Real Estate Investment Trusts (REITS) — 0.1%
GLP Capital LP/GLP Financing II, Inc.
5.250% 6/01/25		10,000		10,953
5.375% 4/15/26		40,000		44,543
WEA Finance LLC/Westfield UK & Europe Finance PLC
3.750% 9/17/24 (b)		220,000		230,809
				286,305
Retail — 0.3%
Costco Wholesale Corp.
1.375% 6/20/27		190,000		188,664
1.600% 4/20/30		110,000		106,677
The Home Depot, Inc.
2.700% 4/15/30		70,000		73,520
3.300% 4/15/40		120,000		130,452
3.350% 4/15/50		220,000		240,835
3.900% 12/06/28		30,000		33,810
3.900% 6/15/47		40,000		46,891

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Lowe's Cos., Inc.
4.500% 4/15/30	$	50,000	$	58,095
McDonald's Corp.
3.300% 7/01/25		60,000		63,632
3.500% 7/01/27		180,000		195,327
3.600% 7/01/30		190,000		210,169
3.625% 9/01/49		40,000		44,303
3.800% 4/01/28		110,000		120,944
4.200% 4/01/50		140,000		170,051
Target Corp.
2.250% 4/15/25		110,000		113,406
Walmart, Inc.
1.500% 9/22/28		80,000		79,577
1.800% 9/22/31		40,000		39,647
				1,916,000
Semiconductors — 0.3%
Broadcom, Inc.
3.137% 11/15/35 (b)		490,000		493,669
Intel Corp.
1.600% 8/12/28		190,000		187,863
3.050% 8/12/51		90,000		92,426
3.700% 7/29/25		40,000		43,179
4.750% 3/25/50		80,000		106,909
NVIDIA Corp.
2.850% 4/01/30		90,000		95,687
3.500% 4/01/40		240,000		270,435
3.500% 4/01/50		170,000		194,528
3.700% 4/01/60		170,000		204,074
NXP BV / NXP Funding LLC / NXP USA, Inc.
2.700% 5/01/25 (b)		120,000		124,006
Texas Instruments, Inc.
1.750% 5/04/30		110,000		107,984
				1,920,760
Software — 0.4%
Microsoft Corp.
2.400% 8/08/26		600,000		628,227
2.525% 6/01/50		133,000		130,215
2.675% 6/01/60		17,000		17,023
2.921% 3/17/52		107,000		114,065
3.041% 3/17/62		83,000		89,201
3.300% 2/06/27		290,000		316,219
Oracle Corp.
1.650% 3/25/26		320,000		317,654
2.875% 3/25/31		350,000		352,616
salesforce.com, Inc.
3.250% 4/11/23		60,000		61,893
3.700% 4/11/28		50,000		55,523
				2,082,636
Telecommunications — 1.2%
AT&T, Inc.
1.650% 2/01/28		280,000		274,296
2.300% 6/01/27		250,000		254,504
2.550% 12/01/33		80,000		78,353

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3.100% 2/01/43	$	240,000	$	234,021
3.300% 2/01/52		40,000		39,323
3.500% 9/15/53		180,000		182,309
3.550% 9/15/55		173,000		174,322
3.650% 9/15/59		60,000		60,847
3.800% 12/01/57		10,000		10,453
4.350% 6/15/45		101,000		114,197
5.350% 9/01/40		40,000		50,883
5.550% 8/15/41		40,000		52,659
Sprint Spectrum Co. LLC/Sprint Spectrum Co. II LLC/Sprint Spectrum Co. III LLC
4.738% 3/20/25 (b)		178,750		187,008
T-Mobile USA, Inc.
2.050% 2/15/28		70,000		69,539
2.250% 2/15/26		70,000		70,175
2.250% 11/15/31		70,000		68,004
2.550% 2/15/31		130,000		129,491
2.625% 2/15/29		230,000		226,550
2.875% 2/15/31		170,000		167,892
3.000% 2/15/41		60,000		58,746
3.300% 2/15/51		20,000		19,607
3.500% 4/15/25		350,000		370,964
3.500% 4/15/31		80,000		83,200
3.500% 4/15/31 (b)		210,000		218,400
3.750% 4/15/27		50,000		54,178
Telefonica Emisiones SA
5.213% 3/08/47		150,000		186,808
Verizon Communications, Inc.
1.750% 1/20/31		280,000		265,310
2.550% 3/21/31		570,000		575,713
2.650% 11/20/40		260,000		247,774
2.875% 11/20/50		530,000		504,899
3.850% 11/01/42		40,000		44,837
3.875% 2/08/29		130,000		144,183
4.000% 3/22/50		120,000		139,450
4.125% 8/15/46		180,000		209,439
4.329% 9/21/28		440,000		500,226
4.400% 11/01/34		270,000		314,916
5.250% 3/16/37		170,000		221,341
5.500% 3/16/47		30,000		41,980
Vodafone Group PLC
4.375% 5/30/28		70,000		78,824
				6,725,621
Transportation — 0.1%
Union Pacific Corp.
2.150% 2/05/27		50,000		51,296
2.891% 4/06/36		270,000		283,395
3.750% 7/15/25		70,000		75,647
3.750% 2/05/70		150,000		170,753
3.839% 3/20/60		120,000		141,901
				722,992
TOTAL CORPORATE DEBT (Cost $159,511,270)				167,239,117

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
MUNICIPAL OBLIGATIONS — 0.0%
Northeast Ohio Regional Sewer District, Revenue Bond
5.000% 11/15/43	$	50,000	$	53,251
State of California
General Obligation, 5.000% 4/01/42		70,000		70,782
General Obligation, 5.000% 11/01/43		50,000		54,088
				178,121
TOTAL MUNICIPAL OBLIGATIONS (Cost $173,256)				178,121
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 9.5%
Auto Floor Plan Asset-Backed Securities — 0.2%
Ford Credit Floorplan Master, Series 2018-4, Class A
4.060% 11/15/30		1,100,000		1,226,674
Automobile Asset-Backed Securities — 0.5%
Hertz Vehicle Financing III LP, Series 2021-2A, Class C
2.520% 12/27/27 (b)		2,500,000		2,486,392
Commercial Mortgage-Backed Securities — 4.2%
Banc of America Merrill Lynch Trust, Series 2016-GG10, Class AJA,
5.830% VRN 8/10/45 (b) (d)		708,576		288,745
BANK, Series 2017-BNK4, Class XA,
1.379% VRN 5/15/50 (d)		3,586,401		188,020
Benchmark Mortgage Trust, Series 2021-B29, Class XA,
1.049% VRN 9/15/54 (b) (d)		2,517,864		187,895
BX Commercial Mortgage Trust, Series 2018-IND, Class G, 1 mo. USD LIBOR + 2.050%
2.160% FRN 11/15/35 (b)		357,000		356,122
Citigroup Commercial Mortgage Trust, Series 2014-GC23, Class B,
4.175% VRN 7/10/47 (d)		350,000		368,162
Credit Suisse Mortgage Trust
Series 2014-USA, Class A2, 3.953% 9/15/37 (b)		190,000		199,649
Series 2019-RIO Class A, 1 mo. USD LIBOR + 3.024% 4.024% FRN 12/15/22 (b)		2,500,000		2,454,552
Series 2014-USA, Class E, 4.373% 9/15/37 (b)		140,000		125,857
Series 2014-USA, Class F, 4.373% 9/15/37 (b)		2,440,000		1,925,096
Series 2017-CHOP, Class G, 1 mo. USD LIBOR + 5.600% 5.710% FRN 7/15/32 (b)		1,160,000		1,075,726
Grace Trust, Series 2020-GRCE, Class D,
2.680% VRN 12/10/40 (b) (d)		4,500,000		4,317,287
GS Mortgage Securities Trust
Series 2021-ROSS, Class A, 1 mo. USD LIBOR + 1.150% 1.260% FRN 5/15/26 (b)		370,000		369,456
Series 2018-SRP5, Class A, 1 mo. USD LIBOR + 1.550% 1.660% FRN 9/15/31 (b)		1,294,677		1,217,211
JPMBB Commercial Mortgage Securities Trust
Series 2014-C19, Class XA, 0.656% VRN 4/15/47 (d)		1,068,408		11,677
Series 2015-C31, Class B, 4.621% VRN 8/15/48 (d)		160,000		171,294
Series 2013-C17, Class B, 4.886% VRN 1/15/47 (d)		30,000		31,483
JPMDB Commercial Mortgage Securities Trust, Series 2017-C7, Class XA,
0.852% VRN 10/15/50 (d)		7,532,126		293,329
ML-CFC Commercial Mortgage Trust, Series 2007-9, Class AJ,
6.193% VRN 9/12/49 (d)		4,586		4,430
Morgan Stanley Capital I Trust
Series 2019-L2, Class B, 4.494% VRN 3/15/52 (d)		850,000		945,377

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2006-IQ12, Class AJ, 5.399% 12/15/43	$	—	$	—
PFP Ltd., Series 2021-8, Class A, 1 mo. USD LIBOR + 1.000%
1.109% FRN 8/09/37 (b)		790,000		787,075
Ready Capital Mortgage Financing LLC, Series 2021-FL7, Class A, 1 mo. USD LIBOR + 1.200%
1.280% FRN 11/25/36 (b)		979,947		979,361
Shops at Crystals Trust, Series 2016-CSTL, Class A
3.126% 7/05/36 (b)		320,000		329,153
UBS Commercial Mortgage Trust, Series 2017-C1, Class A4
3.460% 6/15/50		170,000		180,980
Waterfall Commercial Mortgage Trust, Series 2015-SBC5, Class A,
4.104% VRN 9/14/22 (b) (d)		77,151		77,355
Wells Fargo Commercial Mortgage Trust
Series 2019-C52, Class XA, 1.593% VRN 8/15/52 (d)		5,692,927		534,409
Series 2016-BNK1, Class B, 2.967% 8/15/49		780,000		782,323
Series 2013-LC12, Class B, 4.306% VRN 7/15/46 (d)		140,000		138,599
WFRBS Commercial Mortgage Trust
Series 2014-C24, Class B, 4.204% VRN 11/15/47 (d)		190,000		187,922
Series 2014-C24, Class C, 4.290% VRN 11/15/47 (d)		190,000		171,296
Series 2014-LC14, Class D, 4.586% VRN 3/15/47 (b) (d)		5,000,000		4,997,226
				23,697,067
Home Equity Asset-Backed Securities — 0.5%
Accredited Mortgage Loan Trust, Series 2006-2, Class M1, 1 mo. USD LIBOR + .270%
0.372% FRN 9/25/36		420,000		399,204
Asset Backed Securities Corp. Home Equity Loan Trust, Series 2003-HE6, Class A3B, 1 mo. USD LIBOR + .960%
1.062% FRN 11/25/33		1,237,405		1,122,322
GSAA Home Equity Trust, Series 2006-5, Class 2A3, 1 mo. USD LIBOR + .540%
0.642% FRN 3/25/36		345,359		208,898
RBSSP Resecuritization Trust, Series 2010-4, Class 6A2,
5.825% STEP 2/26/36 (b)		939,015		939,340
				2,669,764
Manufactured Housing Asset-Backed Securities — 0.1%
Conseco Finance Corp., Series 1996-4, Class M1,
7.750% VRN 6/15/27 (d)		616,913		653,306
Other Asset-Backed Securities — 2.6%
Arbor Realty Commercial Real Estate Notes Ltd.
Series 2021-FL3, Class A, 1 mo. USD LIBOR + 1.070% 1.180% FRN 8/15/34 (b)		790,000		788,024
Series 2021-FL4, Class A, 1 mo. USD LIBOR + 1.350% 1.440% FRN 11/15/36 (b)		790,000		790,612
Dividend Solar Loans LLC, Series 2019-1, Class A
3.670% 8/22/39 (b)		888,870		926,526
First Franklin Mortgage Loan Trust, Series 2006-FF15, Class A2, 1 mo. USD LIBOR + .120%
0.222% FRN 11/25/36		341,208		324,843
HGI CRE CLO Ltd., Series 2021-FL2, Class A, 1 mo. USD LIBOR + 1.000%
1.108% FRN 9/19/36 (b)		790,000		787,532
InStar Leasing III LLC, Series 2021-1A, Class A
2.300% 2/15/54 (b)		602,602		598,222
Legacy Mortgage Asset Trust, Series 2019-GS5, Class A1,
3.200% STEP 5/25/59 (b)		1,157,361		1,158,423

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Magnolia Finance XI DAC, Series 2019-1OTF, Class A1, 3 mo. USD LIBOR + 2.900%
3.032% FRN 8/09/24 (b)	$	960,000	$	931,060
PFCA Home Equity Investment Trust, Series 2003-IFC6, Class A,
4.644% VRN 4/22/35 (b) (d)		497,530		494,414
Popular ABS Mortgage Pass-Through Trust, Series 2005-2, Class M2 (ABS),
6.217% STEP 4/25/35		1,124		995
Saxon Asset Securities Trust, Series 2006-3, Class A4, 1 mo. USD LIBOR + .240%
0.342% FRN 10/25/46		440,000		407,954
SBA Small Business Investment Cos.
Series 2019-25G, Class 1, 2.690% 7/01/44		237,113		249,627
Series 2019-20D, Class 1, 2.980% 4/01/39		155,127		164,271
Series 2019-10A, Class 1, 3.113% 3/10/29		419,430		433,454
Series 2018-10B, Class 1, 3.548% 9/10/28		286,293		301,530
Structured Asset Investment Loan Trust, Series 2004-8, Class A9, 1 mo. USD LIBOR + 1.000%
1.102% FRN 9/25/34		851,630		832,914
Taco Bell Funding LLC, Series 2021-1A, Class A23
2.542% 8/25/51 (b)		4,000,000		3,907,887
Towd Point Mortgage Trust, Series 2017-4, Class B2,
3.433% VRN 6/25/57 (b) (d)		740,000		779,026
USQ Rail LLC, Series 2021-1A, Class A
2.250% 2/28/51 (b)		748,626		747,109
				14,624,423
Student Loans Asset-Backed Securities — 0.2%
College Ave Student Loans LLC, Series 2019-A, Class A2
3.280% 12/28/48 (b)		301,782		305,740
SLM Student Loan Trust, Series 2003-7A, Class A5A, 3 mo. USD LIBOR + 1.200%
1.403% FRN 12/15/33 (b)		379,480		379,643
SMB Private Education Loan Trust, Series 2021-A, Class B
2.310% 1/15/53 (b)		600,000		594,628
				1,280,011
Whole Loan Collateral Collateralized Mortgage Obligations — 1.2%
Bear Stearns Asset -Backed Securities I Trust, Series 2005-AC8, Class A3, 1 mo. USD LIBOR + 7.650%
7.548% FRN 11/25/35		674,733		202,299
Citigroup Mortgage Loan Trust, Series 2007-6, Class 2A4, 1 mo. USD LIBOR + .350%
0.452% FRN 5/25/37		1,616,372		679,247
Credit Suisse Mortgage Trust
Series 2015-4R, Class 3A3, 1 mo. USD LIBOR + .310% 0.712% FRN 10/27/36 (b)		746,752		363,996
Series 2021-2R, Class 1A1, 1 mo. USD LIBOR + 1.750% 1.844% FRN 7/25/47 (b)		715,870		721,275
Flagstar Mortgage Trust, Series 2018-2, Class A4,
3.500% VRN 4/25/48 (b) (d)		54,553		54,668
GS Mortgage Securities Trust, Series 2014-2R, Class 3B
0.702% 11/26/37 (b)		1,220,000		1,070,383
GSR Mortgage Loan Trust, Series 2005-AR5, Class 2A3,
2.604% VRN 10/25/35 (d)		50,388		34,503
HarborView Mortgage Loan Trust, Series 2006-2, Class 1A,
2.598% VRN 2/25/36 (d)		27,446		12,163
JP Morgan Mortgage Trust

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2018-3, Class A1, 3.500% VRN 9/25/48 (b) (d)	$	346,251	$	351,288
Series 2018-4, Class A1, 3.500% VRN 10/25/48 (b) (d)		143,618		145,314
Series 2018-5, Class A1, 3.500% VRN 10/25/48 (b) (d)		176,587		178,657
Morgan Stanley Resecuritization Trust, Series 2015-R3, Class 7A2, 12 mo. MTA + .770%
0.854% FRN 4/26/47 (b)		195,589		192,604
New Residential Mortgage Loan Trust
Series 2018-RPL1, Class M2, 3.500% VRN 12/25/57 (b) (d)		730,000		773,784
Series 2017-4A, Class A1, 4.000% VRN 5/25/57 (b) (d)		296,044		312,343
Prime Mortgage Trust
Series 2006-DR1, Class 1A1, 5.500% 5/25/35 (b)		7,587		7,353
Series 2006-DR1, Class 2A2, 6.000% 5/25/35 (b)		555,272		491,095
Structured Adjustable Rate Mortgage Loan Trust, Series 2006-7, Class 1A1,
2.751% VRN 8/25/36 (d)		182,075		139,141
Structured Asset Mortgage Investments, Inc., Series 2005-AR7, Class 4A1, 12 mo. MTA + 2.150%
2.232% FRN 3/25/46		177,767		173,794
Washington Mutual Mortgage Pass-Through Certificates, Series 2006-AR3, Class A1B, 12 mo. MTA + 1.000%
1.082% FRN 2/25/46		540,442		526,980
				6,430,887
Whole Loan Collateral Planned Amortization Classes — 0.0%
Alternative Loan Trust, Series 2006-18CB, Class A6, 1 mo. USD LIBOR + 28.600%
28.193% FRN 7/25/36		44,403		59,647
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $54,119,680)				53,128,171
SOVEREIGN DEBT OBLIGATIONS — 5.7%
Abu Dhabi Government International Bond
3.125% 9/30/49 (b)		1,330,000		1,357,164
Argentine Republic Government International Bond
1.125% STEP 7/09/35		1,927,319		616,761
2.500% STEP 7/09/41		110,000		38,775
Brazil Notas do Tesouro Nacional Serie F
10.000% 1/01/23 BRL (e)		5,801,000		975,586
10.000% 1/01/25 BRL (e)		7,440,000		1,251,425
10.000% 1/01/27 BRL (e)		2,568,000		429,777
10.000% 1/01/31 BRL (e)		10,208,000		1,757,779
Brazilian Government International Bond
5.000% 1/27/45		510,000		477,870
5.625% 1/07/41		900,000		917,811
Colombia Government International Bond
3.250% 4/22/32		430,000		386,462
4.125% 2/22/42		440,000		367,400
Egypt Government International Bond
5.577% 2/21/23 (b)		370,000		382,906
Indonesia Government International Bond
3.500% 1/11/28		400,000		431,448
5.125% 1/15/45 (b)		830,000		1,030,996
6.500% 2/15/31 IDR (e)		58,983,000,000		4,176,092
Kuwait Government International Bond
3.500% 3/20/27 (b)		320,000		348,451
Mexican Bonos
7.750% 11/13/42 MXN (e)		34,785,600		1,648,636

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
8.000% 11/07/47 MXN (e)	$	76,980,000	$	3,725,741
8.500% 5/31/29 MXN (e)		28,500,000		1,472,401
Mexico Government International Bond
4.750% 3/08/44		630,000		685,919
Nigeria Government International Bond
7.143% 2/23/30 (b)		210,000		206,073
Panama Government International Bond
4.500% 4/01/56		350,000		385,528
Peruvian Government International Bond
6.550% 3/14/37		460,000		626,755
Provincia de Buenos Aires/Government Bonds,
3.900% STEP 9/01/37 (b)		540,019		229,508
Qatar Government International Bond
4.000% 3/14/29 (b)		380,000		428,100
4.817% 3/14/49 (b)		640,000		838,810
Republic of Kenya Government International Bond
6.300% 1/23/34 (b)		370,000		362,578
Republic of Poland Government International Bond
4.000% 1/22/24		540,000		570,909
Russian Federal Bond— OFZ
6.900% 5/23/29 RUB (e)		269,798,000		3,324,258
7.250% 5/10/34 RUB (e)		60,500,000		745,688
7.700% 3/16/39 RUB (e)		86,260,000		1,092,599
State of Israel
2.750% 7/03/30		310,000		329,467
				31,619,673
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $35,675,663)				31,619,673
U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (F) — 10.2%
Collateralized Mortgage Obligations — 1.7%
Federal Home Loan Mortgage Corp.
Series 3422, Class AI, 0.250% STEP 1/15/38		8,928		64
Series 5018, Class MI, 2.000% 10/25/50		369,310		45,558
Series 5140, Class NI, 2.500% 5/25/49		295,185		38,086
Series 5010, Class IK, 2.500% 9/25/50		225,105		28,397
Series 5010, Class JI, 2.500% 9/25/50		533,848		74,941
Series 5013, Class IN, 2.500% 9/25/50		279,542		38,767
Series 5040, Class IB, 2.500% 11/25/50		170,487		23,221
Series 5059, Class IB, 2.500% 1/25/51		755,027		112,024
Series 5069, Class MI, 2.500% 2/25/51		90,513		12,825
Series 4793, Class CB, 3.000% 5/15/48		275,972		286,544
Series 4793, Class CD, 3.000% 6/15/48		170,834		177,383
Series 4813, Class CJ, 3.000% 8/15/48		137,264		141,643
Series 353, Class S1, 1 mo. USD LIBOR + 6.000% 5.890% FRN 12/15/46		257,637		47,445
Series 334, Class S7, 1 mo. USD LIBOR + 6.100% 5.990% FRN 8/15/44		111,077		20,757
Series R007, Class ZA, 6.000% 5/15/36		68,639		78,176
Series 3621, Class SB, 1 mo. USD LIBOR + 6.230% 6.120% FRN 1/15/40		24,902		4,805
Series 4203, Class PS, 1 mo. USD LIBOR + 6.250% 6.140% FRN 9/15/42		105,252		13,645
Series 3973, Class SA, 1 mo. USD LIBOR + 6.490% 6.380% FRN 12/15/41		165,353		33,116
Federal Home Loan Mortgage Corp. Multifamily Structured Pass-Through Certificates
Series 2012-K20, Class X2A, 0.200% 5/25/45 (b)		2,779,988		592
Series K741, Class X1, 0.572% VRN 12/25/27 (d)		2,998,779		91,919
Series K094, Class X1, 0.880% VRN 6/25/29 (d)		997,325		57,868
Series K743, Class X1, 0.926% VRN 5/25/28 (d)		4,000,000		214,932

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series KC05, Class X1, 1.202% VRN 6/25/27 (d)	$	1,571,680	$	64,065
Series K736, Class X1, 1.311% VRN 7/25/26 (d)		2,184,378		104,916
Series K110, Class X1, 1.697% VRN 4/25/30 (d)		1,297,182		155,354
Series 2019-KF58, Class B, 1 mo. USD LIBOR + 2.150% 2.244% FRN 1/25/26 (b)		615,134		615,944
Federal National Mortgage Association
Series 2006-118, Class IP1, 0.152% FRN 12/25/36 (d)		62,825		3,778
Series 2006-118, Class IP2, 0.152% FRN 12/25/36 (d)		45,439		2,858
Series 2005-88, Class IP, 1.588% FRN 10/25/35 (d)		24,955		1,032
Series 2006-88, Class IP, 1.839% 3/25/36		35,348		1,696
Series 2020-47, Class GZ, 2.000% 7/25/50		309,129		287,962
Series 2020-97, Class AI, 2.000% 1/25/51		189,631		24,154
Series 2006-59, Class IP, 2.459% FRN 7/25/36 (d)		73,970		5,202
Series 2020-56, Class DI, 2.500% 8/25/50		434,559		62,523
Series 2020-57, Class NI, 2.500% 8/25/50		359,641		53,502
Series 2020-74, Class EI, 2.500% 10/25/50		174,049		27,061
Series 2020-89, Class DI, 2.500% 12/25/50		1,203,761		161,585
Series 2021-3, Class QI, 2.500% 2/25/51		816,388		107,238
Series 2021-3, Class IB, 2.500% 2/25/51		283,058		45,586
Series 409, Class C2, 3.000% 4/25/27		57,179		2,921
Series 409, Class C13, 3.500% 11/25/41		63,404		7,755
Series 409, Class C18, 4.000% 4/25/42		72,458		11,055
Series 409, Class C22, 4.500% 11/25/39		48,916		7,666
Series 2011-59, Class NZ, 5.500% 7/25/41		318,933		360,359
Series 2013-9, Class CB, 5.500% 4/25/42		263,036		294,785
Series 2013-124, Class SB, 1 mo. USD LIBOR + 5.950% 5.848% FRN 12/25/43		266,301		46,200
Series 2016-61, Class BS, 1 mo. USD LIBOR + 6.100% 5.998% FRN 9/25/46		93,888		15,227
Series 2017-76, Class SB, 1 mo. USD LIBOR + 6.100% 5.998% FRN 10/25/57		553,739		113,759
Series 2012-46, Class BA, 6.000% 5/25/42		66,172		74,879
Series 2012-133, Class CS, 1 mo. USD LIBOR + 6.150% 6.048% FRN 12/25/42		80,329		15,461
Series 2012-134, Class SK, 1 mo. USD LIBOR + 6.150% 6.048% FRN 12/25/42		145,974		31,594
Series 2013-54, Class BS, 1 mo. USD LIBOR + 6.150% 6.048% FRN 6/25/43		209,040		40,302
Series 2017-85, Class SC, 1 mo. USD LIBOR + 6.200% 6.098% FRN 11/25/47		160,890		29,157
Series 2012-35, Class SC, 1 mo. USD LIBOR + 6.500% 6.398% FRN 4/25/42		74,821		13,971
Series 2011-87, Class SG, 1 mo. USD LIBOR + 6.550% 6.448% FRN 4/25/40		85,196		5,617
Series 2011-96, Class SA, 1 mo. USD LIBOR + 6.550% 6.448% FRN 10/25/41		165,203		29,566
Series 2012-28, Class B, 6.500% 6/25/39		7,925		8,502
Series 2013-9, Class BC, 6.500% 7/25/42		77,637		86,956
Series 2012-74, Class SA, 1 mo. USD LIBOR + 6.650% 6.548% FRN 3/25/42		41,617		6,871
Series 2012-51, Class B, 7.000% 5/25/42		57,416		67,677
Federal National Mortgage Association ACES
Series 2020-M36, Class X1, 1.465% VRN 9/25/34 (d)		1,288,207		123,216
Series 2019-M19, Class A2, 2.560% 9/25/29		460,181		484,189
Federal National Mortgage Association Grantor Trust Series 2017-T1, Class A 2.898% 6/25/27		99,538		105,846
Government National Mortgage Association
Series 2012-144, Class IO, 0.354% VRN 1/16/53 (d)		2,390,343		35,459

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2018-H07, Class FD, 1 mo. USD LIBOR + .300% 0.381% FRN 5/20/68	$	338,560	$	339,178
Series 2010-H28, Class FE, 1 mo. USD LIBOR + .400% 0.481% FRN 12/20/60		99,912		100,405
Series 2014-186, Class IO, 0.492% VRN 8/16/54 (d)		589,272		9,339
Series 2014-H20, Class FA, 1 mo. USD LIBOR + .430% 0.511% FRN 10/20/64		1,030,313		1,036,404
Series 2012-135, Class IO, 0.538% VRN 1/16/53 (d)		3,078,739		64,753
Series 2020-H13, Class FA, 1 mo. USD LIBOR + .450% 0.554% FRN 7/20/70		163,232		164,648
Series 2020-H13, Class FC, 1 mo. USD LIBOR + .450% 0.554% FRN 7/20/70		70,023		70,640
Series 2011-H08, Class FG, 1 mo. USD LIBOR + .480% 0.561% FRN 3/20/61		77,310		77,998
Series 2011-H09, Class AF, 1 mo. USD LIBOR + .500% 0.581% FRN 3/20/61		56,694		57,161
Series 2017-41, Class IO, 0.617% VRN 7/16/58 (d)		967,057		38,783
Series 2021-60, Class IO, 0.835% VRN 5/16/63 (d)		2,466,360		187,463
Series 2020-H09, Class FL, 1 mo. USD LIBOR + 1.150% 1.254% FRN 5/20/70		496,614		526,696
Series 2014-22, Class IA, 1.306% FRN 11/20/42 (d)		22,842		650
Series 2020-H09, Class NF, 1 mo. USD LIBOR + 1.250% 1.354% FRN 4/20/70		147,435		153,823
Series 2017-H18, Class BI, 1.614% VRN 9/20/67 (d)		3,385,570		219,361
Series 2012-H27, Class AI, 1.764% VRN 10/20/62 (d)		433,797		20,249
Series 2020-181, Class WI, 2.000% 12/20/50		1,457,851		153,525
Series 2017-H20, Class IB, 2.034% VRN 10/20/67 (d)		70,169		5,684
Series 2017-H15, Class KI, 2.199% VRN 7/20/67 (d)		132,965		12,958
Series 2020-123, Class NI, 2.500% 8/20/50		453,475		57,719
Series 2020-123, Class IL, 2.500% 8/20/50		185,276		23,933
Series 2020-127, Class IN, 2.500% 8/20/50		180,927		23,012
Series 2020-129, Class IE, 2.500% 9/20/50		185,388		23,805
Series 2020-160, Class IH, 2.500% 10/20/50		187,778		24,911
Series 2020-160, Class YI, 2.500% 10/20/50		740,150		97,668
Series 2020-160, Class VI, 2.500% 10/20/50		276,752		36,559
Series 2013-107, Class AD, 2.768% VRN 11/16/47 (d)		206,179		211,015
3.000% 9/20/51		195,880		203,246
Series 2012-66, Class CI, 3.500% 2/20/38		4,066		4
Series 2013-53, Class OI, 3.500% 4/20/43		428,202		43,786
Series 2020-47, Class MI, 3.500% 4/20/50		337,867		48,651
Series 2020-47, Class NI, 3.500% 4/20/50		86,970		12,704
Series 2014-176, Class IA, 4.000% 11/20/44		46,083		6,723
Series 2015-167, Class OI, 4.000% 4/16/45		57,153		9,366
Series 2016-84, Class IG, 4.500% 11/16/45		259,434		47,524
Series 2016-135, Class SB, 1 mo. USD LIBOR + 6.100% 5.993% FRN 10/16/46		112,096		28,687
Series 2016-21, Class ST, 1 mo. USD LIBOR + 6.150% 6.046% FRN 2/20/46		71,693		14,072
Series 2010-85, Class HS, 1 mo. USD LIBOR + 6.650% 6.546% FRN 1/20/40		10,513		467
				9,439,724
Pass-Through Securities — 7.8%
Federal Home Loan Mortgage Corp.
Pool #RB5125 2.000% 9/01/41		977,738		989,987
Pool #RA3882 2.000% 11/01/50		361,055		360,980
Pool #QB8602 2.000% 2/01/51		92,052		92,367
Pool #QB9087 2.000% 2/01/51		460,868		461,529

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #QB9090 2.000% 2/01/51	$	96,261	$	96,309
Pool #SD0552 2.000% 3/01/51		467,099		467,112
Pool #QB9482 2.000% 3/01/51		92,023		92,055
Pool #QC0041 2.000% 3/01/51		89,942		89,972
Pool #QC0160 2.000% 3/01/51		91,442		91,531
Pool #QC0161 2.000% 3/01/51		91,246		91,277
Pool #QB9290 2.000% 3/01/51		287,852		288,319
Pool #QC0297 2.000% 4/01/51		196,423		196,521
Pool #SD0573 2.000% 4/01/51		183,381		184,008
Pool #QC0885 2.000% 4/01/51		94,877		95,201
Pool #QC1164 2.000% 4/01/51		93,137		93,271
Pool #840698 5 year CMT + 1.286% 2.078% FRN 3/01/47		24,089		23,951
Pool #QK0701 2.500% 4/01/41		92,114		94,985
Pool #QB5092 2.500% 11/01/50		182,615		187,984
Pool #QB5093 2.500% 11/01/50		86,635		88,986
Pool #QB8934 2.500% 2/01/51		178,456		182,672
Pool #QC0165 2.500% 3/01/51		91,930		94,655
Pool #QC6551 2.500% 9/01/51		98,191		100,840
Pool #841077 12 mo. USD LIBOR + 1.620% 2.875% FRN 11/01/47		168,933		173,822
Pool #ZS8669 3.000% 9/01/32		86,253		90,477
Pool #ZS8673 3.000% 10/01/32		60,020		62,959
Pool #ZT1257 3.000% 1/01/46		173,062		184,422
Pool #G67701 3.000% 10/01/46		692,637		733,464
Pool #G60985 3.000% 5/01/47		1,380,603		1,461,981
Pool #ZT1493 3.000% 9/01/48		147,140		155,487
Pool #RA1293 3.000% 9/01/49		470,473		496,246
Pool #RA3175 3.000% 7/01/50		114,744		119,820
Pool #841076 12 mo. USD LIBOR + 1.628% 3.016% FRN 11/01/48		622,392		638,650
Pool #841081 12 mo. USD LIBOR + 1.622% 3.090% FRN 2/01/50		273,094		282,069
Pool #ZS9316 3.500% 1/01/38		337,690		362,021
Pool #Q41209 3.500% 6/01/46		160,496		172,026
Pool #Q19135 4.000% 6/01/43		28,693		31,433
Pool #Q19236 4.000% 6/01/43		18,924		20,606
Pool #Q19985 4.000% 7/01/43		884,271		965,840
Pool #Q19615 4.000% 7/01/43		28,167		30,856
Pool #C09071 4.000% 2/01/45		171,299		184,380
Pool #G67713 4.000% 6/01/48		609,556		660,722
Pool #ZA6680 4.000% 4/01/49		424,679		458,888
Pool #U92272 4.500% 12/01/43		3,986		4,373
Pool #Q49177 4.500% 6/01/47		156,916		171,287
Pool #Q56002 5.000% 5/01/48		38,876		42,433
Pool #G06875 5.500% 12/01/38		5,395		6,141
Pool #G06669 6.500% 9/01/39		10,819		12,808
Pool #G07509 6.500% 9/01/39		10,195		12,148
Pool #G07335 7.000% 3/01/39		24,870		30,338
Federal National Mortgage Association
Pool #CA8377 1.500% 12/01/35		91,179		91,660
Pool #BQ0254 2.000% 8/01/50		81,661		81,786
Pool #BQ1528 2.000% 9/01/50		81,875		82,000
Pool #BQ9224 2.000% 1/01/51		186,874		186,806
Pool #BR2641 2.000% 2/01/51		90,208		90,338
Pool #BR2643 2.000% 2/01/51		85,696		85,779
Pool #BR2644 2.000% 2/01/51		89,675		89,706
Pool #BR2664 2.000% 2/01/51		349,406		349,908
Pool #BR3500 2.000% 2/01/51		89,203		89,165
Pool #BR3256 2.000% 2/01/51		89,567		90,027
Pool #BR3257 2.000% 2/01/51		89,612		89,918
Poll #BR3290 2.000% 3/01/51		373,536		373,547

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #BR3286 2.000% 3/01/51	$	91,415	$	91,425
Pool #BR4722 2.000% 3/01/51		90,873		90,904
Pool #BR4753 2.000% 3/01/51		92,208		92,341
Pool #BR4756 2.000% 3/01/51		88,234		88,264
Pool #BR5458 2.000% 3/01/51		93,727		93,774
Pool #BR5487 2.000% 3/01/51		90,687		90,718
Pool #BR5587 2.000% 3/01/51		91,534		91,623
Pool #BR5577 2.000% 3/01/51		93,608		93,640
Pool #BR5649 2.000% 3/01/51		95,654		95,687
Pool #BR5633 2.000% 3/01/51		94,415		94,448
Pool #BR6462 2.000% 3/01/51		96,402		96,345
Pool #FM6343 2.000% 3/01/51		95,335		95,367
Pool #BQ9453 2.000% 3/01/51		185,665		185,966
Pool #BR4080 2.000% 3/01/51		91,155		91,101
Pool #BR5589 2.000% 3/01/51		91,235		91,181
Pool #FM6418 2.000% 3/01/51		92,741		92,932
Pool #BR7745 2.000% 4/01/51		92,837		92,970
Pool #BR7744 2.000% 4/01/51		91,638		91,827
Pool #BR8478 2.000% 4/01/51		93,031		93,223
Pool #BR8518 2.000% 4/01/51		92,956		93,089
Pool #BL5850 2.260% 4/01/30		386,694		399,152
Pool #MA2749 2.500% 9/01/36		51,273		52,800
Pool #FM3123 2.500% 3/01/38		498,756		513,617
Pool #CA9358 2.500% 3/01/41		93,191		96,696
Pool #CB0100 2.500% 4/01/41		188,614		196,415
Pool #CB0101 2.500% 4/01/41		95,093		98,670
Pool #CB0114 2.500% 4/01/41		376,670		389,894
Pool #CB0470 2.500% 5/01/41		755,458		780,800
Pool #FM4577 2.500% 10/01/50		261,897		268,964
Pool #BQ5876 2.500% 11/01/50		92,834		95,354
Pool #BR0001 2.500% 12/01/50		89,247		91,513
Pool #FM5423 2.500% 1/01/51		444,685		456,684
Pool #FM5713 2.500% 2/01/51		168,918		172,750
Pool #FM6460 2.500% 3/01/51		187,223		192,283
Pool #BR7222 2.500% 4/01/51		194,002		199,082
Pool #FM6871 2.500% 4/01/51		190,761		196,699
Pool #FM7304 2.500% 5/01/51		190,667		195,687
Pool #FM7675 2.500% 6/01/51		281,038		288,674
Pool #FM7676 2.500% 6/01/51		96,132		98,717
Pool #FM7900 2.500% 7/01/51		193,258		198,630
Pool #BT3303 2.500% 8/01/51		99,039		101,704
Pool #BU0051 2.500% 9/01/51		593,246		607,456
Pool #FM8864 2.500% 10/01/51		196,978		202,662
Pool #FM9335 2.500% 10/01/51		99,631		101,822
Pool #AM8674 2.810% 4/01/25		50,000		52,086
Pool #MA2320 3.000% 7/01/35		49,422		51,909
Pool #MA2523 3.000% 2/01/36		334,616		351,456
Pool #MA2579 3.000% 4/01/36		244,845		257,167
Pool #MA2707 3.000% 8/01/36		297,295		311,978
Pool #MA2773 3.000% 10/01/36		1,092,628		1,146,592
Pool #MA2832 3.000% 12/01/36		554,183		581,554
Pool #AQ7306 3.000% 1/01/43		31,637		33,674
Pool #AR1202 3.000% 1/01/43		37,466		39,878
Pool #AS7738 3.000% 8/01/46		431,273		455,942
Pool #BC1509 3.000% 8/01/46		40,642		42,840
Pool #AS7844 3.000% 9/01/46		73,446		77,395
Pool #BC2817 3.000% 9/01/46		55,094		58,056
Pool #BD8104 3.000% 10/01/46		193,708		205,031

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #AL9397 3.000% 10/01/46	$	81,038	$	85,395
Pool #BM1565 3.000% 4/01/47		759,543		803,939
Pool #CA4979 3.000% 1/01/50		170,248		177,539
Pool #FM8576 3.000% 2/01/50		94,885		99,246
Pool #BP7009 3.000% 8/01/50		136,997		143,056
Pool #AN8048 3.080% 1/01/28		210,000		225,157
Pool #BL2454 3.160% 5/01/29		86,972		94,129
Pool #MA2110 3.500% 12/01/34		75,519		80,630
Pool #MA2138 3.500% 1/01/35		38,746		41,368
Pool #AS8740 3.500% 2/01/37		82,887		88,419
Pool #FM5754 3.500% 3/01/37		67,147		71,692
Pool #890827 3.500% 12/01/37		49,005		52,520
Pool #FM6015 3.500% 8/01/39		66,605		71,091
Pool #FM0068 3.500% 2/01/40		248,451		269,614
Pool #FM0071 3.500% 2/01/40		53,605		57,300
Pool #MA1177 3.500% 9/01/42		21,532		23,238
Pool #MA1213 3.500% 10/01/42		133,078		143,623
Pool #AL3026 3.500% 12/01/42		39,521		42,393
Pool #AY6181 3.500% 4/01/45		100,249		107,222
Pool #AS6328 3.500% 12/01/45		417,068		442,401
Pool #AS6541 3.500% 1/01/46		109,062		117,295
Pool #AS6562 3.500% 1/01/46		87,659		94,030
Pool #AL9546 3.500% 11/01/46		219,096		234,006
Pool #BC9096 3.500% 12/01/46		89,480		95,172
Pool #FM3347 3.500% 5/01/47		241,260		256,683
Pool #CA0907 3.500% 12/01/47		42,958		45,962
Pool #FM3469 3.500% 8/01/48		467,736		497,929
Pool #FM3773 3.500% 11/01/48		483,718		514,641
Pool #FM3278 3.500% 11/01/48		131,818		139,925
Pool #AK8441 4.000% 4/01/42		16,544		17,914
Pool #AO2711 4.000% 5/01/42		10,470		11,337
Pool #AO6086 4.000% 6/01/42		21,953		23,771
Pool #AP0692 4.000% 7/01/42		16,483		17,848
Pool #AP5333 4.000% 7/01/42		150,218		162,658
Pool #AP2530 4.000% 8/01/42		16,116		17,450
Pool #AP4903 4.000% 9/01/42		27,592		29,877
Pool #AP7399 4.000% 9/01/42		40,451		43,801
Pool #AP9229 4.000% 10/01/42		12,948		14,020
Pool #MA1217 4.000% 10/01/42		101,532		110,924
Pool #AP9766 4.000% 10/01/42		79,079		86,271
Pool #MA1253 4.000% 11/01/42		60,927		66,468
Pool #AQ3599 4.000% 11/01/42		16,890		18,283
Pool #AQ7003 4.000% 12/01/42		37,531		40,627
Pool #AQ4555 4.000% 12/01/42		33,050		35,777
Pool #AQ7082 4.000% 1/01/43		47,446		51,361
Pool #AL3508 4.000% 4/01/43		29,483		32,284
Pool #AQ4078 4.000% 6/01/43		30,166		33,031
Pool #AQ4080 4.000% 6/01/43		21,000		22,857
Pool #AT8394 4.000% 6/01/43		29,288		32,070
Pool #AB9683 4.000% 6/01/43		43,062		46,615
Pool #AT9637 4.000% 7/01/43		86,509		94,161
Pool #AT9653 4.000% 7/01/43		65,116		71,303
Pool #AT9657 4.000% 7/01/43		50,055		54,184
Pool #AS0070 4.000% 8/01/43		25,408		27,718
Pool #MA1547 4.000% 8/01/43		29,294		31,959
Pool #AS4347 4.000% 1/01/45		49,738		54,214
Pool #BF0104 4.000% 2/01/56		94,041		103,798
Pool #BF0183 4.000% 1/01/57		52,657		58,120

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #BF0191 4.000% 6/01/57	$	94,132	$	103,751
Pool #MA0706 4.500% 4/01/31		13,366		14,563
Pool #MA0734 4.500% 5/01/31		46,850		51,047
Pool #MA0776 4.500% 6/01/31		15,955		17,384
Pool #MA0913 4.500% 11/01/31		11,480		12,508
Pool #MA0939 4.500% 12/01/31		12,288		13,389
Pool #993117 4.500% 1/01/39		1,077		1,178
Pool #AA0856 4.500% 1/01/39		7,276		8,009
Pool #AA3495 4.500% 2/01/39		6,350		6,976
Pool #935520 4.500% 8/01/39		10,968		12,060
Pool #AD5481 4.500% 5/01/40		317,058		349,131
Pool #AD6914 4.500% 6/01/40		34,275		37,734
Pool #AD8685 4.500% 8/01/40		90,815		99,845
Pool #MA1591 4.500% 9/01/43		57,781		63,373
Pool #MA1629 4.500% 10/01/43		51,375		56,347
Pool #AL4341 4.500% 10/01/43		3,135		3,432
Pool #MA1664 4.500% 11/01/43		26,276		28,818
Pool #MA1711 4.500% 12/01/43		55,381		60,740
Pool #AL4741 4.500% 1/01/44		23,718		26,014
Pool #AW0318 4.500% 2/01/44		47,345		51,883
Pool #AL5562 4.500% 4/01/44		10,994		12,051
Pool #890604 4.500% 10/01/44		230,374		253,100
Pool #AS4271 4.500% 1/01/45		29,769		33,348
Pool #CA2047 4.500% 7/01/48		235,926		256,969
Pool #CA5379 4.500% 3/01/50		234,448		255,213
Pool #BF0148 4.500% 4/01/56		429,911		473,815
Pool #BF0222 4.500% 9/01/57		485,475		541,406
Pool #BF0301 4.500% 8/01/58		50,266		56,042
Pool #BF0338 4.500% 1/01/59		123,254		137,415
Pool #915154 5.000% 4/01/37		34,882		38,992
Pool #974965 5.000% 4/01/38		96,703		108,132
Pool #983077 5.000% 5/01/38		26,837		30,051
Pool #310088 5.000% 6/01/38		22,883		25,587
Pool #AE2266 5.000% 3/01/40		57,763		64,592
Pool #937948 5.500% 6/01/37		7,914		9,104
Pool #995072 5.500% 8/01/38		12,940		14,878
Pool #BF0141 5.500% 9/01/56		480,785		549,473
Pool #481473 6.000% 2/01/29		13		14
Pool #867557 6.000% 2/01/36		1,665		1,851
Pool #AE0469 6.000% 12/01/39		107,503		125,052
Pool #BM1948 6.000% 7/01/41		119,020		137,987
Pool #AL4324 6.500% 5/01/40		66,598		79,403
Pool #AE0758 7.000% 2/01/39		37,538		45,935
Government National Mortgage Association
Pool #AB2892 3.000% 9/15/42		90,464		95,666
Pool #AA5649 3.000% 9/15/42		92,313		97,622
Pool #783669 3.000% 9/15/42		172,909		182,853
Pool #AB9108 3.000% 10/15/42		634,791		671,297
Pool #AB9109 3.000% 10/15/42		54,128		57,241
Pool #AB9207 3.000% 11/15/42		48,078		50,828
Pool #784571 3.500% 6/15/48		206,890		221,603
Pool #BS8439 3.500% 5/15/50		202,356		213,204
Pool #487588 6.000% 4/15/29		732		808
Pool #595077 6.000% 10/15/32		237		267
Pool #596620 6.000% 10/15/32		195		220
Pool #604706 6.000% 10/15/33		31,878		36,167
Pool #636251 6.000% 3/15/35		3,805		4,349
Pool #782034 6.000% 1/15/36		33,277		37,941

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #658029 6.000% 7/15/36	$	11,006	$	12,590
Government National Mortgage Association II
Pool #MA4068 3.000% 11/20/46		25,022		26,166
Pool #MA1995 3.500% 6/20/44		62,734		66,942
Pool #MA2678 3.500% 3/20/45		27,115		28,756
Pool #784106 3.500% 1/20/46		71,766		75,817
Pool #MA3597 3.500% 4/20/46		114,479		120,835
Pool #BC4732 3.500% 10/20/47		257,660		272,931
Pool #BD0384 3.500% 10/20/47		181,675		192,443
Pool #784825 3.500% 10/20/49		84,594		87,361
Pool #BM7534 3.500% 2/20/50		86,328		91,688
Pool #MA4511 4.000% 6/20/47		737,980		786,297
Pool #MA4720 4.000% 9/20/47		495,789		527,320
Pool #BM9734 4.000% 10/20/49		50,695		54,014
Pool #BM9743 4.000% 11/20/49		60,439		64,396
Pool #BS1728 4.000% 1/20/50		61,372		65,390
Pool #BS1742 4.000% 2/20/50		57,037		60,771
Pool #BS1757 4.000% 3/20/50		50,609		53,923
Pool #BS8420 4.000% 4/20/50		224,122		238,796
Pool #783298 4.500% 4/20/41		97,634		107,322
Pool #783368 4.500% 7/20/41		14,507		15,947
Pool #MA4654 4.500% 8/20/47		166,184		178,676
Pool #MA5138 4.500% 4/20/48		264,246		281,611
Pool #MA5193 4.500% 5/20/48		268,296		285,591
Pool #MA5265 4.500% 6/20/48		235,538		250,557
Pool #MA5331 4.500% 7/20/48		59,851		63,648
Pool #MA5818 4.500% 3/20/49		80,230		85,120
Pool #4747 5.000% 7/20/40		60,961		67,649
Uniform Mortgage Backed Securities TBA
2.500% 7/01/51 (g)		200,000		203,773
2.500% 7/01/51 (g)		600,000		612,844
3.000% 5/01/49 (g)		400,000		414,562
3.000% 5/01/49 (g)		100,000		103,492
				43,302,159
Whole Loans — 0.7%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes
Series 2020-DNA2, Class M2, 1 mo. USD LIBOR + 1.850% 1.953% FRN 2/25/50 (b)		537,954		539,737
Series 2020-DNA6, Class M2, SOFR30A + 2.000% 2.050% FRN 12/25/50 (b)		780,000		783,728
Series 2020-DNA1, Class B1, 1 mo. USD LIBOR + 2.300% 2.403% FRN 1/25/50 (b)		380,000		379,564
Series 2017-DNA1, Class B1, 1 mo. USD LIBOR + 4.950% 5.053% FRN 7/25/29		1,450,000		1,574,276
Federal National Mortgage Association Connecticut Avenue Securities Trust
Series 2019-R07, Class 1M2, 1 mo. USD LIBOR + 2.100% 2.203% FRN 10/25/39 (b)		167,075		167,582
Series 2019-R02, Class 1M2, 1 mo. USD LIBOR + 2.300% 2.403% FRN 8/25/31 (b)		265,861		266,987
Series 2018-C05, Class 1B1, 1 mo. USD LIBOR + 4.250% 4.353% FRN 1/25/31		370,000		387,811
				4,099,685
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $56,922,106)				56,841,568

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
U.S. TREASURY OBLIGATIONS — 10.2%
U.S. Treasury Bonds & Notes — 10.2%
U.S. Treasury Bond
1.625% 11/15/50	$	710,000	$	659,993
1.750% 8/15/41		20,000		19,351
1.875% 2/15/51		4,340,000		4,285,073
1.875% 11/15/51		7,215,000		7,163,142
2.000% 11/15/41		3,060,000		3,094,425
2.000% 2/15/50		1,730,000		1,754,659
2.000% 8/15/51		1,700,000		1,729,051
2.250% 5/15/41		300,000		314,554
2.375% 5/15/51		2,910,000		3,208,176
3.000% 2/15/48		16,000		19,506
3.750% 11/15/43		1,560,000		2,065,050
U.S. Treasury Note
0.250% 11/15/23		70,000		69,422
0.250% 10/31/25		200,000		193,359
0.625% 12/31/27		155,100		148,517
1.250% 11/30/26		8,460,000		8,461,382
1.250% 12/31/26		3,150,000		3,148,768
1.250% 8/15/31		1,640,000		1,603,997
1.375% 12/31/28		2,510,000		2,499,803
1.375% 11/15/31		13,940,000		13,765,750
1.625% 5/15/31		1,890,000		1,914,363
U.S. Treasury Strip
0.010% 5/15/49		1,450,000		859,328
				56,977,669
TOTAL U.S. TREASURY OBLIGATIONS (Cost $56,575,893)				56,977,669
TOTAL BONDS & NOTES (Cost $386,076,647)				389,008,011
TOTAL PURCHASED OPTIONS (#) — 0.0% (Cost $74,547)				98,616
TOTAL LONG-TERM INVESTMENTS (Cost $386,151,194)				389,106,627
SHORT-TERM INVESTMENTS — 29.0%
Discount Notes — 0.3%
Federal Home Loan Bank Discount Notes
0.051% 3/18/22 (h)		1,450,000		1,449,851
0.053% 3/09/22 (h)		490,000		489,956
				1,939,807
Repurchase Agreement — 0.1%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (i)		796,897		796,897

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
U.S. Treasury Bill — 28.6%
U.S. Treasury Bill
0.130% 6/16/22 (h)	$	1,930,000	$	1,928,846
United States Cash Management Bill
0.112% 4/26/22 (h)		2,850,000		2,849,379
United States Treasury Floating Rate Note
3 mo. Treasury money market yield + .049% 0.000%FRN 1/31/23		35,475,000		35,487,274
3 mo. Treasury money market yield + .034% 0.000%FRN 4/30/23		54,600,000		54,607,808
3 mo. Treasury money market yield + .029% 0.000%FRN 7/31/23		2,215,000		2,215,133
3 mo. Treasury money market yield + .029% 0.000%FRN 7/31/23		54,600,000		54,603,276
3 mo. Treasury money market yield + .029% 0.000%FRN 7/31/23		2,860,000		2,860,171
3 mo. Treasury money market yield + .035% 0.000%FRN 10/31/23		5,400,000		5,400,594
				159,952,481
TOTAL SHORT-TERM INVESTMENTS (Cost $162,693,910)				162,689,185
TOTAL INVESTMENTS — 98.6% (Cost $548,845,104) (j)				551,795,812
Other Assets/(Liabilities) — 1.4%				7,859,548
NET ASSETS — 100.0%			$	559,655,360

Abbreviation Legend

CLO Collateralized Loan Obligation

FRN Floating Rate Note

IO Interest Only

STEP Step Up Bond

TBA To Be Announced

VRN Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) All or a portion of the security represents unsettled loan commitments at December 31, 2021 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 December 31, 2021, the aggregate market value of these securities amounted to $87,646,863 or 15.66% of net assets.

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

(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 December 31, 2021.

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

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

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

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

(i) Maturity value of $796,897. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $812,836.

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

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

(#) Exchange-Traded Options Purchased
Description	Expiration Date	Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
Eurodollar Future	3/14/22		99.88		98	USD	24,415,475	$	1,225	$	1,431	$	(206)
Put
U.S. Treasury Note 10 Year Future	1/07/22		130.50		43	USD	5,610,156	$	16,797	$	19,559	$	(2,762)
Eurodollar Future	3/14/22		99.63		353	USD	87,945,538		41,919		32,891		9,028
Eurodollar Future	6/13/22		99.50		91	USD	22,614,638		38,675		20,666		18,009
								$	97,391	$	73,116	$	24,275
								$	98,616	$	74,547	$	24,069

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	1/21/22		131.50		43	USD	5,610,156	$	(8,062)	$	(27,222)	$	19,160
U.S. Treasury Note 5 Year Future	1/21/22		121.25		34	USD	4,113,203		(7,969)		(9,668)		1,699
U.S. Treasury Note 5 Year Future	1/21/22		121.50		34	USD	4,113,203		(5,047)		(8,441)		3,394
U.S. Treasury Bond Future	2/18/22		169.00		65	USD	10,428,438		(15,234)		(59,793)		44,559
U.S. Treasury Note 10 Year Future	2/18/22		133.50		45	USD	5,871,094		(4,219)		(12,985)		8,766
Eurodollar Future	3/14/22		99.75		98	USD	24,415,475		(5,513)		(16,945)		11,432
								$	(46,044)	$	(135,054)	$	89,010
Put
U.S. Treasury Note 10 Year Future	1/21/22		131.50		43	USD	5,610,156	$	(52,405)	$	(34,049)	$	(18,356)
U.S. Treasury Note 10 Year Future	2/18/22		129.00		70	USD	9,132,813		(28,437)		(34,661)		6,224
Eurodollar Future	3/14/22		99.38		231	USD	57,550,763		(2,888)		(10,990)		8,102
Eurodollar Future	3/14/22		99.75		98	USD	24,415,475		(28,788)		(19,395)		(9,393)
Eurodollar Future	6/13/22		99.00		91	USD	22,614,638		(5,688)		(5,497)		(191)
Eurodollar Future	6/19/23		97.00		88	USD	21,698,600		(13,750)		(17,415)		3,665
								$	(131,956)	$	(122,007)	$	(9,949)
								$	(178,000)	$	(257,061)	$	79,061

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
BNP Paribas SA	1/18/22	BRL	2,644,832	USD	463,685	$	9,667
BNP Paribas SA	1/18/22	USD	1,088,397	EUR	940,000		17,910
Citibank N.A.	1/18/22	IDR	23,023,950,712	USD	1,594,766		19,008
Citibank N.A.	1/18/22	CAD	9,030,000	USD	7,189,204		(50,668)
Citibank N.A.	1/18/22	AUD	7,820,330	USD	5,703,156		(13,262)
Citibank N.A.	1/18/22	EUR	308,166	USD	357,224		(6,279)
Citibank N.A.	1/18/22	BRL	4,477,000	USD	785,122		16,137
Citibank N.A.	1/18/22	USD	193,591	CAD	240,000		3,862
Citibank N.A.	1/18/22	USD	148,603	AUD	200,000		3,088
Citibank N.A.	1/18/22	MXN	4,555,250	USD	$219,020		2,938
Goldman Sachs International	1/18/22	RUB	358,346,359	USD	4,838,229		(74,255)
Goldman Sachs International	1/18/22	GBP	2,632,114	USD	3,591,893		(29,296)
Goldman Sachs International	1/18/22	MXN	10,900,000	USD	509,942		21,169
Goldman Sachs International	1/18/22	USD	648,739	RUB	46,590,000		29,357
Morgan Stanley & Co. LLC	1/18/22	ZAR	6,889,002	USD	446,726		(15,253)
Morgan Stanley & Co. LLC	1/18/22	CAD	6,756,746	USD	5,382,171		(40,723)
Morgan Stanley & Co. LLC	1/18/22	JPY	642,474,779	USD	5,660,032		(74,236)
Morgan Stanley & Co. LLC	1/18/22	USD	876,858	BRL	4,863,493		6,427
						$	(174,409)

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/ Net Unrealized Appreciation/ (Depreciation)
Long
Euro-OAT	3/08/22		14	$	2,646,063	$	(45,616)
Australia Treasury Bond 10 Year	3/15/22		48		4,857,441		2,616
U.S. Treasury Long Bond	3/22/22		52		8,206,642		136,108
U.S. Treasury Ultra Bond	3/22/22		258		50,482,156		376,094
U.S. Treasury Note 2 Year	3/31/22		12		2,617,521		542
U.S. Treasury Note 5 Year	3/31/22		1,755		211,956,193		357,675
90 Day Eurodollar	12/19/22		331		82,089,558		(204,295)
90 Day Eurodollar	6/19/23		82		20,345,761		(126,611)
90 Day Eurodollar	12/18/23		474		117,255,383		(639,533)
						$	(143,020)
Short
Euro-Bund	3/08/22		73	$	(14,425,159)	$	182,517
Euro-Buxl 30 Year Bond	3/08/22		2		(484,406)		13,659
90 Day Eurodollar	3/14/22		63		(15,709,172)		13,509
Japanese Government Bond 10 Year	3/14/22		4		(5,289,723)		18,402
U.S. Treasury Note 10 Year	3/22/22		1,022		(132,680,183)		(658,880)
U.S. Treasury Ultra 10 Year	3/22/22		41		(5,917,853)		(86,085)
						$	(516,878)

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

Centrally Cleared Credit Default Swap - 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 37†	1.000%		Quarterly		12/20/26		BBB+*	USD	46,558,000	$	1,131,033	$	1,117,518	$	13,515
CDX.NA.HY Series 37†	5.000%		Quarterly		12/20/26		BB*	USD	5,990,000		547,504		567,371		(19,867)
										$	1,678,537	$	1,684,889	$	(6,352)

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-MXN-TIIE-Banxico	Monthly	Fixed 7.450%		Monthly		7/18/29	MXN	88,370,000	$	(5,035)	$	37,242	$	(42,277)
3-Month USD LIBOR	Quarterly	Fixed 0.190%		Semi-Annually		6/15/22	USD	15,757,000		(6,611)		(71)		(6,540)
Fixed 3.970%	Maturity	U.S. Consumer Price Index		Maturity		11/18/23	USD	3,530,000		(18,971)		(19,506)		535
Fixed 2.950%	Maturity	U.S. Consumer Price Index		Maturity		10/20/26	USD	3,480,000		(38,505)		(1,826)		(36,679)
U.S. Consumer Price Index	Maturity	Fixed 3.370%		Maturity		11/18/26	USD	3,530,000		41,868		55,349		(13,481)
Fixed 1.520%	Annually	12-Month USD SOFR		Annually		11/20/26	USD	4,000,000		(17,209)		(9,570)		(7,639)
Fixed 0.710%	Annually	12-Month USD SOFR		Annually		5/15/27	USD	17,179,000		382,822		45,133		337,689
Fixed 1.350%	Semi-Annually	3-Month USD LIBOR		Quarterly		2/15/28	USD	6,275,000		26,025		(43,386)		69,411
Fixed 1.130%	Annually	12-Month USD SOFR		Annually		8/15/28	USD	980,000		3,898		6,525		(2,627)
Fixed 1.220%	Annually	12-Month USD SOFR		Annually		8/15/28	USD	2,942,000		(5,383)		(190)		(5,193)
Fixed 1.200%	Annually	12-Month USD SOFR		Annually		11/01/28	USD	2,290,000		101		(134)		235
Fixed 1.733	Annually	12-Month USD SOFR		Annually		10/20/31	USD	3,490,000		(35,787)		13,723		(49,510)
U.S. Consumer Price Index	Maturity	Fixed 2.770%		Maturity		10/20/31	USD	3,480,000		(43,883)		3,003		(46,886)
Fixed 0.560%	Annually	12-Month USD SOFR		Annually		7/20/45	USD	3,470,000		635,094		78,573		556,521
Fixed 0.740%	Annually	12-Month USD SOFR		Annually		8/19/45	USD	2,400,000		352,920		—		352,920
Fixed 1.000%	Semi-Annually	3-Month USD LIBOR		Quarterly		2/15/47	USD	193,000		29,939		1,398		28,541
Fixed 1.225%	Semi-Annually	3-Month USD LIBOR		Quarterly		2/15/47	USD	434,000		46,736		498		46,238
Fixed 1.200%	Semi-Annually	3-Month USD LIBOR		Quarterly		2/15/47	USD	861,000		97,258		4,743		92,515
Fixed 1.600%	Semi-Annually	3-Month USD LIBOR		Quarterly		2/15/47	USD	1,140,000		32,627		6,103		26,524
Fixed 1.729%	Annually	Fed Funds		Annually		2/15/47	USD	935,000		(53,462)		—		(53,462)
Fixed 1.630%	Semi-Annually	3-Month USD LIBOR		Quarterly		2/15/47	USD	737,000		16,433		(2,267)		18,700
Fixed 1.520%	Annually	12-Month USD SOFR		Annually		2/15/47	USD	1,137,000		(14,434)		(29,927)		15,493
Fixed 2.000%	Semi-Annually	3-Month USD LIBOR		Quarterly		6/03/51	USD	199,000		(13,448)		2,070		(15,518)
Fixed 2.050%	Semi-Annually	3-Month USD LIBOR		Quarterly		6/07/51	USD	614,000		(48,859)		77		(48,936)
Fixed 1.671%	Semi-Annually	3-Month USD LIBOR		Quarterly		7/09/51	USD	1,535,000		16,959		(6,841)		23,800
									$	1,381,093	$	140,719	$	1,240,374

MassMutual Strategic Bond Fund —  Portfolio of Investments (Continued)

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 7.024%

Maturity

Citibank N.A.

1/04/27

BRL

9,300,000

$

(90,560)

$

—

$

(90,560)

BRL CDI

Maturity

Fixed 7.024%

Maturity

Citibank N.A.

1/04/27

BRL

11,000,000

(107,114)

5,820

(112,934)

BRL CDI

Maturity

Fixed 7.024%

Maturity

Citibank N.A.

1/04/27

BRL

11,846,000

(115,352)

7,253

(122,605)

$

(313,026)

$

13,073

$

(326,099)

* 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

EUR Euro

GBP British Pound

IDR Indonesian Rupiah

JPY Japanese Yen

MXN Mexican Peso

RUB Russian Ruble

USD U.S. Dollar

ZAR South African Rand

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 67.5%
COMMON STOCK — 66.5%
Australia — 0.1%
Australia & New Zealand Banking Group Ltd.		515	$	10,311
BHP Group Ltd. (a)		3,253		98,452
Commonwealth Bank of Australia		108		7,938
CSL Ltd.		247		52,306
Endeavour Group Ltd.		13,960		68,476
Goodman Group		1,292		24,949
Magellan Financial Group Ltd. (a)		653		10,095
Quintis Group (Acquired 7/20/16-12/04/18, Cost $355,478) (b) (c) (d) (e)		578,796		130,542
Rio Tinto Ltd.		165		12,055
Santos Ltd.		5,969		27,441
South32 Ltd.		107,736		315,793
Treasury Wine Estates Ltd.		3,820		34,439
Westpac Banking Corp.		2,113		32,851
Woodside Petroleum Ltd.		4,695		74,992
				900,640
Belgium — 0.0%
Etablissements Franz Colruyt NV		2,400		101,814
Umicore SA		433		17,667
				119,481
Bermuda — 0.1%
China Gas Holdings Ltd.		6,400		13,296
IHS Markit Ltd.		278		36,952
Jardine Matheson Holdings Ltd.		200		11,010
Nine Dragons Paper Holdings Ltd.		8,000		8,590
Signet Jewelers Ltd.		3,369		293,204
				363,052
Brazil — 0.0%
B3 SA - Brasil Bolsa Balcao		11,121		22,224
Banco do Brasil SA		1,714		8,871
Cosan SA		2,468		9,694
Engie Brasil Energia SA		4,495		31,018
Locaweb Servicos de Internet SA (e) (f)		31,767		74,225
Natura & Co. Holding SA (e)		5,051		23,472
Sendas Distribuidora SA		3,146		7,433
WEG SA		3,581		21,196
				198,133
British Virgin Islands — 0.1%
Capri Holdings Ltd. (e)		7,601		493,381

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Number of Shares		Value
Canada — 1.1%
Alimentation Couche-Tard, Inc.		858	$	35,949
Barrick Gold Corp.		854		16,237
Brookfield Asset Management, Inc. Class A		262		15,822
Brookfield Renewable Corp. Class A		184		6,771
Canadian Natural Resources Ltd.		648		27,381
Cenovus Energy, Inc.		23,745		291,589
Cenovus Energy, Inc.		112,007		1,373,358
CGI, Inc. (e)		642		56,767
Enbridge, Inc.		123,727		4,832,880
George Weston Ltd.		218		25,275
Great-West Lifeco, Inc.		681		20,436
Lions Gate Entertainment Corp. Class A (e)		12,274		204,239
Loblaw Cos. Ltd.		281		23,023
Nutrien Ltd.		1,160		87,192
Restaurant Brands International, Inc.		347		21,040
Rogers Communications, Inc. Class B		305		14,522
Saputo, Inc.		973		21,922
Shopify, Inc. Class A (e)		221		304,403
Shopify, Inc. Class A (e)		13		17,900
TC Energy Corp. (a)		597		27,765
Thomson Reuters Corp.		837		100,093
Waste Connections, Inc.		581		79,173
				7,603,737
Cayman Islands — 1.6%
AAC Technologies Holdings, Inc.		19,000		74,854
Alibaba Group Holding Ltd. (e)		33,000		494,075
Alibaba Group Holding Ltd. Sponsored ADR (e)		6,770		804,208
Angelalign Technology, Inc. (e) (f)		2,600		83,166
ANTA Sports Products Ltd.		20,600		309,051
ASM Pacific Technology Ltd.		500		5,390
China Feihe Ltd. (f)		29,000		38,932
China Hongqiao Group Ltd.		78,500		82,865
China Resources Cement Holdings Ltd.		20,000		15,135
Dali Foods Group Co. Ltd. (f)		15,500		8,111
Diversey Holdings Ltd. (e)		70,626		940,032
ENN Energy Holdings Ltd.		4,000		75,356
GlobalFoundries, Inc. (e)		25,182		1,636,074
Haidilao International Holding Ltd. (f)		41,000		92,630
Hedosophia European Growth (e)		20,637		231,193
Hengan International Group Co. Ltd.		1,500		7,723
Highland Transcend Partners I Corp. (e)		21,145		218,005
Huazhu Group Ltd. ADR (e)		6,137		229,156
Hygeia Healthcare Holdings Co. Ltd. (f)		22,200		139,056
JD Health International, Inc. (e) (f)		81,500		643,421
Jinxin Fertility Group Ltd. (e) (f)		120,000		134,064
Kingdee International Software Group Co. Ltd. (e)		69,000		212,729
Kingsoft Corp. Ltd.		30,200		132,666
Li Auto, Inc. ADR (e)		26,227		841,887
Meituan (e) (f)		2,800		80,948
Microport Cardioflow Medtech Corp. (e) (f)		343,000		170,096
Ming Yuan Cloud Group Holdings Ltd.		34,000		77,458
NetEase.com, Inc. ADR		1,138		115,826
NU Holdings Ltd/Cayman Islands (e)		39,199		367,687
Sands China Ltd. (e)		4,000		9,318
Sea Ltd. ADR (e)		62		13,870

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Number of Shares		Value
Shimao Group Holdings Ltd.		11,500	$	7,523
SITC International Holdings Co. Ltd.		13,000		47,054
Tencent Holdings Ltd.		37,100		2,176,406
Tingyi Cayman Islands Holding Corp.		20,000		41,099
Trip.com Group Ltd. ADR (e)		570		14,033
Vipshop Holdings Ltd. ADR (e)		3,853		32,365
Want Want China Holdings Ltd.		127,000		116,616
Weibo Corp. Sponsored ADR (e)		741		22,956
Wuxi Biologics Cayman, Inc. (e) (f)		25,098		298,325
				11,041,359
China — 0.9%
Agricultural Bank of China Ltd. Class H		170,000		58,452
Aier Eye Hospital Group Co. Ltd. Class A		24,632		163,394
Amoy Diagnostics Co. Ltd. Class A		14,450		171,179
Anhui Gujing Distillery Co. Ltd. Class B		400		5,694
Asymchem Laboratories Tianjin Co. Ltd. Class A		2,527		172,462
Bank of China Ltd. Class H		50,000		18,019
BYD Co. Ltd. Class A		19,600		823,646
China Construction Bank Corp. Class H		101,000		69,981
China COSCO Holdings Co. Ltd. Class H (e)		17,600		34,173
China Galaxy Securities Co. Ltd. Class H		11,500		6,607
China Life Insurance Co. Ltd. Class H		12,000		19,881
China Merchants Bank Co. Ltd. Class H		17,000		132,119
China National Building Material Co. Ltd. Class H		88,000		107,952
China Pacific Insurance Group Co. Ltd. Class H		6,400		17,367
China Petroleum & Chemical Corp. Class H		150,000		69,910
China Tower Corp. Ltd. Class H (f)		96,000		10,592
Contemporary Amperex Technology Co. Ltd. Class A		18,200		1,678,539
Dongfeng Motor Group Co. Ltd. Class H		40,000		33,258
Foshan Haitian Flavouring & Food Co. Ltd. Class A		14,700		242,395
Ganfeng Lithium Co. Ltd. Class H (f)		13,800		217,201
Glodon Co. Ltd. Class A		13,900		139,550
Guangzhou Baiyun International Airport Co. Ltd.		126,300		239,371
Haitong Securities Co. Ltd. Class H		9,200		8,156
Hangzhou Robam Appliances Co. Ltd. Class A		16,400		92,451
Hangzhou Tigermed Consulting Co. Ltd. Class H (f)		6,000		76,218
Hundsun Technologies, Inc. Class A		21,193		206,484
Industrial & Commercial Bank of China Ltd. Class H		178,000		100,485
Jafron Biomedical Co. Ltd. Class A		4,500		37,646
Jiangsu Hengrui Medicine Co. Ltd. Class A		20,000		159,094
JiuGui Liquor Co. Ltd.		400		13,331
Kweichow Moutai Co. Ltd. Class A		700		225,132
Nongfu Spring Co. Ltd. Class H (f)		4,200		27,739
PetroChina Co. Ltd. Class H		72,000		32,066
Pharmaron Beijing Co. Ltd. Class H (f)		1,000		15,428
PICC Property & Casualty Co. Ltd. Class H		32,000		26,158
Ping An Insurance Group Co. of China Ltd. Class H		9,000		64,871
Shenzhen Mindray Bio-Medical Electronics Co. Ltd. Class A		300		17,924
Venustech Group, Inc. Class A		27,650		123,764
WuXi AppTec Co. Ltd. Class A		7,224		134,415
Yifeng Pharmacy Chain Co. Ltd. Class A		13,884		120,039
Yonyou Network Technology Co. Ltd. Class A		40,028		225,053
				6,138,196

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Number of Shares		Value
Denmark — 0.3%
AP Moller - Maersk A/S Class B		29	$	104,079
DSV A/S		3,849		889,376
GN Store Nord A/S		801		50,051
Novo Nordisk A/S Class B		4,879		545,447
Pandora A/S		4,932		613,840
				2,202,793
Finland — 0.2%
Neste OYJ		20,028		987,587
Nordea Bank Abp		1,226		14,931
Wartsila OYJ Abp		1,573		21,906
				1,024,424
France — 2.2%
Alstom SA		39,450		1,405,011
Arkema SA		11,522		1,625,098
BNP Paribas SA		14,919		1,030,814
Cie de Saint-Gobain		22,069		1,552,341
Cie Generale des Etablissements Michelin SCA		64		10,491
Credit Agricole SA		1,124		16,055
Danone SA		25,600		1,590,148
Electricite de France SA		4,471		52,542
EssilorLuxottica SA		3,802		809,328
Kering SA		309		247,939
La Francaise des Jeux SAEM (f)		536		23,748
LVMH Moet Hennessy Louis Vuitton SE		4,283		3,534,333
Orange SA		1,264		13,541
Orpea SA		214		21,403
Pernod-Ricard SA		209		50,285
Remy Cointreau SA		152		37,000
Safran SA		19,959		2,451,338
Schneider Electric SE		729		142,920
Societe Generale SA		16,076		552,043
TotalEnergies SE		454		23,059
				15,189,437
Germany — 3.1%
adidas AG		266		76,715
Allianz SE		5,654		1,336,715
Auto1 Group SE (e) (f)		27,837		609,051
Bayer AG Registered		199		10,653
Bayerische Motoren Werke AG		1,074		108,229
Brenntag SE		379		34,337
Covestro AG (f)		7,596		468,710
Daimler AG Registered		55,298		4,246,324
Daimler Truck Holding AG (e)		19,472		715,833
Deutsche Boerse AG		484		81,080
Deutsche Post AG Registered		498		32,055
Deutsche Telekom AG		167,395		3,111,059
Evonik Industries AG		639		20,710
Fresenius Medical Care AG & Co. KGaA		201		13,021
Fresenius SE & Co. KGaA		331		13,346
Infineon Technologies AG		18,340		850,408
Puma SE		12,729		1,558,604
SAP SE		579		82,693

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Number of Shares		Value
Siemens AG		32,298	$	5,614,124
Siemens Energy AG (e)		2,649		67,823
Teamviewer AG (e) (f)		899		12,065
Telefonica Deutschland Holding AG		2,603		7,201
Vantage Towers AG		63,641		2,331,587
Vitesco Technologies Group AG (e)		355		17,416
				21,419,759
Hong Kong — 0.4%
AIA Group Ltd.		230,400		2,322,759
Hang Lung Properties Ltd.		33,000		67,887
Lenovo Group Ltd.		86,000		98,831
Sun Art Retail Group Ltd.		15,500		6,222
				2,495,699
India — 0.1%
HCL Technologies Ltd.		4,544		80,660
Indian Oil Corp. Ltd.		13,076		19,617
InterGlobe Aviation Ltd. (e) (f)		4,060		109,196
Reliance Industries Ltd.		7,573		241,152
Tata Consultancy Services Ltd.		345		17,360
				467,985
Indonesia — 0.0%
Bank Central Asia Tbk PT		374,700		189,884
Ireland — 0.2%
Accenture PLC Class A		73		30,262
Allegion PLC		118		15,628
Aon PLC Class A		36		10,820
Eaton Corp. PLC		605		104,556
Johnson Controls International PLC		5,086		413,543
Linde PLC		1,518		525,881
Medtronic PLC		1,125		116,381
Trane Technologies PLC		1,804		364,462
Willis Towers Watson PLC		369		87,634
				1,669,167
Israel — 0.4%
Nice Ltd. Sponsored ADR (a) (e)		8,673		2,633,123
SimilarWeb Ltd. (e)		4,399		78,786
				2,711,909
Italy — 0.8%
Enel SpA		236,669		1,884,824
Eni SpA		1,321		18,261
Intesa Sanpaolo		1,257,842		3,249,808
				5,152,893
Japan — 2.2%
Advantest Corp.		800		75,113
AGC, Inc.		1,700		81,144
Aisin Corp.		1,100		42,177
Asahi Group Holdings Ltd.		300		11,643

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Number of Shares		Value
Asahi Kasei Corp.		1,600	$	15,038
Astellas Pharma, Inc.		10,850		176,463
Capcom Co. Ltd.		2,000		47,089
Chubu Electric Power Co., Inc.		2,300		24,284
Chugai Pharmaceutical Co. Ltd.		4,000		129,735
Daifuku Co. Ltd.		2,700		220,669
Daikin Industries Ltd.		300		68,056
Disco Corp.		1,300		397,312
Electric Power Development Co. Ltd.		600		7,965
Fanuc Ltd.		12,300		2,607,426
Fast Retailing Co. Ltd.		100		56,784
Fujitsu		800		137,070
GLP J-REIT		11		19,007
GMO Payment Gateway, Inc.		2,300		285,124
Honda Motor Co. Ltd.		5,000		140,412
Hoya Corp.		16,009		2,373,727
Inpex Corp.		2,600		22,672
ITOCHU Corp.		3,000		91,761
Kao Corp.		3,300		172,684
KDDI Corp.		1,700		49,689
Keyence Corp.		1,735		1,090,382
Kirin Holdings Co. Ltd. (a)		7,400		118,676
Kose Corp.		5,400		612,688
Kyocera Corp.		1,400		87,482
LIXIL Group Corp.		1,800		47,967
Marubeni Corp.		8,000		77,869
Mazda Motor Corp. (e)		13,300		102,336
Mitsubishi Corp.		3,400		107,955
Mitsubishi Electric Corp.		17,000		215,571
Mitsubishi Heavy Industries Ltd.		2,900		67,125
Mitsui & Co. Ltd.		3,000		71,038
Mizuho Financial Group, Inc.		11,200		142,455
MS&AD Insurance Group Holdings, Inc.		2,000		61,711
Murata Manufacturing Co. Ltd.		900		71,455
NEC Corp.		4,200		193,899
Nidec Corp.		800		94,041
Nintendo Co. Ltd.		100		46,644
Nippon Paint Holdings Co. Ltd.		1,600		17,445
Nippon Telegraph & Telephone Corp.		4,800		131,241
Nippon Yusen KK		1,100		83,783
Nissan Motor Co. Ltd. (e)		6,300		30,444
Nitto Denko Corp.		700		54,105
Nomura Holdings, Inc.		35,600		155,257
Obic Co. Ltd.		100		18,718
Olympus Corp.		3,700		84,986
Oracle Corp.		1,200		91,106
Oriental Land Co. Ltd.		1,900		320,183
Osaka Gas Co. Ltd.		900		14,903
Otsuka Holdings Co. Ltd.		2,500		90,467
Pan Pacific International Holding Corp.		10,800		148,743
Panasonic Corp.		8,400		92,388
Recruit Holdings Co. Ltd.		16,909		1,025,005
Ricoh Co. Ltd.		4,000		37,246
Rohm Co. Ltd.		600		54,285
Softbank Corp.		7,800		98,634
SoftBank Group Corp.		1,700		80,324
Sony Group Corp.		7,200		910,147
Subaru Corp.		3,500		62,594

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Number of Shares		Value
Sumco Corp.		1,200	$	24,297
Sumitomo Corp.		7,500		110,884
Sumitomo Mitsui Trust Holdings, Inc.		600		20,031
Suzuki Motor Corp.		3,100		119,376
Takeda Pharmaceutical Co. Ltd.		3,100		84,721
Terumo Corp.		1,600		67,609
Tokyo Electron Ltd.		200		114,491
Tokyo Gas Co. Ltd.		400		7,190
Toray Industries, Inc.		2,400		14,227
Toyota Motor Corp.		12,400		228,902
Yamato Holdings Co. Ltd.		4,000		93,802
				14,949,872
Luxembourg — 0.0%
ArcelorMittal SA		8,776		282,283
Mexico — 0.0%
Fomento Economico Mexicano SAB de CV		2,448		19,068
Grupo Bimbo SAB de CV Series A		9,325		28,733
				47,801
Netherlands — 2.2%
Adyen NV (e) (f)		789		2,064,200
ASML Holding NV		5,370		4,281,891
Ferrari NV		2,263		582,082
Heineken Holding NV		107		9,879
ING Groep NV		290,783		4,051,920
Koninklijke Ahold Delhaize NV		989		33,888
Koninklijke Philips NV		4,327		160,832
NXP Semiconductors NV		12,297		2,801,011
QIAGEN NV (e)		9,343		519,284
QIAGEN NV (e)		318		17,720
Randstad NV		1,278		87,553
Stellantis Nv		6,360		119,417
STMicroelectronics NV		7,960		390,175
				15,119,852
Norway — 0.1%
LINK Mobility Group Holding ASA (a) (e)		19,500		42,413
Norsk Hydro ASA		39,922		314,444
				356,857
Poland — 0.0%
Dino Polska SA (e) (f)		123		11,212
Polski Koncern Naftowy ORLEN SA		1,009		18,601
				29,813
Portugal — 0.0%
Jeronimo Martins SGPS SA		6,985		159,860
Republic of Korea — 0.6%
Amorepacific Corp.		7,728		1,077,473
DL E&C Co. Ltd. (e)		106		10,605
Fila Holdings Corp.		406		12,236
Hana Financial Group, Inc.		1,122		39,511

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Number of Shares		Value
Kakao Corp. (e)		7,457	$	703,324
KB Financial Group, Inc.		787		36,277
Kia Corp.		277		19,017
Krafton, Inc. (e)		182		70,321
Kumho Petrochemical Co. Ltd.		189		26,309
LG Chem Ltd.		1,252		645,968
LG Household & Health Care Ltd.		29		26,754
Lotte Chemical Corp.		60		10,946
OCI Co. Ltd. (e)		72		6,295
POSCO		524		120,289
Samsung Biologics Co. Ltd. (e) (f)		32		24,278
Samsung Electronics Co. Ltd.		1,432		94,011
Samsung Fire & Marine Insurance Co. Ltd.		102		17,289
Samsung SDI Co. Ltd. (e)		1,557		852,822
SK Hynix, Inc. (e)		164		17,943
SK Innovation Co. Ltd. (e)		176		35,290
				3,846,958
Saudi Arabia — 0.0%
Dr Sulaiman Al Habib Medical Services Group Co.		191		8,212
Singapore — 0.1%
DBS Group Holdings Ltd.		8,900		215,480
Singapore Press Holdings Ltd.		3,800		6,570
United Overseas Bank Ltd.		9,400		187,716
				409,766
South Africa — 0.0%
FirstRand Ltd.		4,486		17,115
Impala Platinum Holdings Ltd.		3,089		43,629
Kumba Iron Ore Ltd.		844		24,412
Standard Bank Group Ltd.		1,098		9,646
				94,802
Spain — 0.4%
Banco Santander SA		3,322		11,088
Cellnex Telecom SA (f)		44,034		2,556,616
Endesa SA (a)		1,947		44,883
Iberdrola SA		6,188		72,514
				2,685,101
Sweden — 0.9%
Atlas Copco AB Class A		9,653		668,215
Elekta AB (a)		1,680		21,224
Epiroc AB Class A		13,650		346,069
EQT AB		142		7,718
H & M Hennes & Mauritz AB (a)		3,567		69,956
Hexagon AB Class B		44,195		695,786
Kinnevik AB Class B (e)		338		11,957
Lundin Energy AB		190		6,814
Saab AB Class B		570		14,495
Sandvik AB		70,257		1,962,969
Svenska Handelsbanken AB Class A		5,049		54,505
Volvo AB Class B		102,577		2,364,980
				6,224,688

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Number of Shares		Value
Switzerland — 1.0%
ABB Ltd. Registered		4,227	$	161,054
Adecco Group AG Registered		2,206		112,784
Alcon, Inc. (a)		1,200		104,544
Cie Financiere Richemont SA		3,089		461,259
Garmin Ltd.		82		11,166
Julius Baer Group Ltd.		650		43,437
Kuehne & Nagel International AG Registered		113		36,340
Lonza Group AG Registered		857		713,918
Nestle SA		4,313		602,922
Novartis AG Registered		246		21,603
On Holding AG, Class A (e)		4,789		181,072
Partners Group Holding AG		137		225,847
Roche Holding AG		52		21,556
Sika AG Registered		2,420		1,004,531
Straumann Holding AG Registered		305		644,479
The Swatch Group AG		171		52,094
TE Connectivity Ltd.		15,460		2,494,316
UBS Group AG Registered		682		12,241
Vifor Pharma AG		35		6,267
				6,911,430
Taiwan — 0.9%
ASE Technology Holding Co. Ltd.		6,000		23,002
Asustek Computer Inc		1,000		13,591
Cathay Financial Holding Co. Ltd.		61,000		137,454
Evergreen Marine Corp. Taiwan Ltd.		10,000		51,240
Formosa Plastics Corp.		29,000		108,794
Fubon Financial Holding Co. Ltd.		64,497		177,833
Hon Hai Precision Industry Co. Ltd.		34,080		127,765
MediaTek, Inc.		4,000		171,019
Nan Ya Plastics Corp.		40,000		123,214
Nanya Technology Corp.		4,000		11,287
Novatek Microelectronics Corp.		4,000		77,598
SinoPac Financial Holdings Co. Ltd.		27,000		15,743
Taiwan Cooperative Financial Holding Co. Ltd.		29,000		26,649
Taiwan Glass Industry Corp.		24,000		23,132
Taiwan Semiconductor Manufacturing Co. Ltd.		219,000		4,849,264
Uni-President Enterprises Corp.		30,000		74,390
United Microelectronics Corp.		15,000		35,045
Yageo Corporation		2,000		34,560
				6,081,580
Thailand — 0.0%
Intouch Holdings PCL		53,700		129,005
Turkey — 0.0%
BIM Birlesik Magazalar AS		1,965		8,907
United Kingdom — 2.9%
Alphawave IP Group PLC (a) (e)		69,703		188,259
Anglo American PLC		14,721		602,573
Aptiv PLC (e)		10,336		1,704,923
AstraZeneca PLC		22,801		2,656,890
Atlassian Corp. PLC Class A (e)		1,390		529,993
Auto Trader Group PLC (f)		28,943		289,310
Barclays PLC		81,222		206,449

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Number of Shares		Value
BHP Group PLC		19,992	$	595,812
BP PLC		31,627		140,699
BP PLC Sponsored ADR		17,098		455,320
British American Tobacco PLC		503		18,637
Burberry Group PLC		2,500		61,258
Compass Group PLC (e)		71,259		1,587,385
Diageo PLC		2,573		140,262
Dr. Martens Plc (e)		8,175		47,274
Experian PLC		311		15,256
Ferguson PLC		3,113		552,996
Genius Sports Ltd. (e)		23,710		180,196
GlaxoSmithKline PLC		1,824		39,661
Glencore PLC		184,571		939,034
Hargreaves Lansdown PLC		801		14,699
Intertek Group PLC		179		13,612
Kingfisher PLC		10,173		46,512
Legal & General Group PLC		12,918		52,001
Lloyds Banking Group PLC		6,811,930		4,391,531
London Stock Exchange Group PLC		154		14,414
National Grid PLC		1,782		25,711
Natwest Group PLC		7,350		22,396
NMC Health PLC (b) (d) (e)		27,178		—
RELX PLC		923		30,082
Rio Tinto PLC		6,964		459,145
Royal Dutch Shell PLC Class A		1,767		38,771
Royal Mail PLC		6,395		43,868
Smith & Nephew PLC		2,354		41,203
Spirax-Sarco Engineering PLC		1,811		394,052
THG PLC (e)		256,750		796,799
Unilever PLC		52,435		2,809,174
Vodafone Group PLC		10,463		15,605
				20,161,762
United States — 43.6%
Abbott Laboratories		40,000		5,629,600
AbbVie, Inc.		37,237		5,041,890
Activision Blizzard, Inc.		1,091		72,584
Adobe, Inc. (e)		308		174,654
Advance Auto Parts, Inc.		2,765		663,268
Advanced Micro Devices, Inc. (e)		364		52,380
Agilent Technologies, Inc.		545		87,009
Air Products & Chemicals, Inc.		10,274		3,125,967
Airbnb, Inc.Class A (e)		1,094		182,140
Akamai Technologies, Inc. (e)		102		11,938
Albemarle Corp.		5,513		1,288,774
Alcoa Corp.		2,851		169,863
The Allstate Corp.		259		30,471
Alnylam Pharmaceuticals, Inc. (e)		1,985		336,616
Alphabet, Inc. Class A (e)		22		63,735
Alphabet, Inc. Class C (e) (h)		4,362		12,621,840
Altair Engineering, Inc. Class A (e)		8,307		642,297
AltC Acquisition Corp. (e)		20,946		206,318
Altice USA, Inc. Class A (e)		3,910		63,264
Amazon.com, Inc. (e) (h)		2,848		9,496,200
American Tower Corp.		18,846		5,512,455
American Water Works Co., Inc.		2,452		463,085
AMETEK, Inc.		382		56,169
Amphenol Corp. Class A		295		25,801

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Number of Shares		Value
Analog Devices, Inc.		191	$	33,572
ANSYS, Inc. (e)		1,668		669,068
Anthem, Inc.		6,486		3,006,520
Apple, Inc.		78,347		13,912,077
Applied Materials, Inc.		19,017		2,992,515
Arthur J Gallagher & Co.		131		22,227
Autodesk, Inc. (e)		9,077		2,552,362
AutoZone, Inc. (e)		17		35,639
AvidXchange Holdings, Inc. (a) (e)		539		8,117
Bank of America Corp.		125,997		5,605,607
The Bank of New York Mellon Corp.		411		23,871
Bath & Body Works, Inc.		5,720		399,199
Becton Dickinson and Co.		300		75,444
Berkshire Hathaway, Inc. Class B (e)		459		137,241
Best Buy Co., Inc.		4,922		500,075
Bio-Rad Laboratories, Inc. Class A (e)		14		10,578
Booking Holdings, Inc. (e)		5		11,996
Boston Scientific Corp. (e)		110,157		4,679,469
Bristol-Myers Squibb Co.		45,049		2,808,805
Brown & Brown, Inc.		216		15,180
Brown-Forman Corp. Class B		1,734		126,339
Cadence Design Systems, Inc. (e)		3,797		707,571
California Resources Corp.		11,883		507,523
Capital One Financial Corp.		28,287		4,104,161
Cardinal Health, Inc.		229		11,791
Carrier Global Corp.		8,531		462,721
CBRE Group, Inc. Class A (e)		421		45,683
Cerner Corp.		508		47,178
CF Industries Holdings, Inc.		4,235		299,753
Charles River Laboratories International, Inc. (e)		63		23,737
The Charles Schwab Corp.		52,249		4,394,141
Charter Communications, Inc. Class A (e)		3,878		2,528,340
Cigna Corp.		219		50,289
Citigroup, Inc.		319		19,264
Citrix Systems, Inc.		187		17,688
CME Group, Inc.		2,286		522,260
Comcast Corp. Class A		76,239		3,837,109
ConocoPhillips		72,525		5,234,854
Constellation Brands, Inc. Class A (g)		615		154,347
Corteva, Inc.		1,939		91,676
Costco Wholesale Corp.		8,184		4,646,057
Crowdstrike Holdings, Inc. Class A (e)		5,836		1,194,921
Crown Castle International Corp.		457		95,394
D.R. Horton, Inc.		31,370		3,402,076
Danaher Corp.		942		309,927
Datadog, Inc. Class A (e)		1,908		339,834
DaVita, Inc. (e)		1,030		117,173
Deere & Co.		596		204,362
Dell Technologies Class C (e)		1,140		64,034
Delta Air Lines, Inc. (e)		6,227		243,351
Devon Energy Corp.		6,690		294,694
DexCom, Inc. (e)		1,280		687,296
Dick's Sporting Goods, Inc. (a)		1,966		226,070
DocuSign, Inc. (e)		392		59,706
Dominion Energy, Inc.		107		8,406
Duke Energy Corp.		72		7,553
Dynatrace, Inc. (e)		7,393		446,168
Edwards Lifesciences Corp. (e)		18,535		2,401,209

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Number of Shares		Value
Electronic Arts, Inc.		1,052	$	138,759
Element Solutions, Inc.		6,100		148,108
Eli Lilly & Co.		55		15,192
Emerson Electric Co.		1,809		168,183
Energy Transfer LP		27,583		227,008
Enphase Energy, Inc. (e)		48		8,781
EPAM Systems, Inc. (e)		403		269,385
EQT Corp. (e)		126,550		2,760,055
Equity Residential		771		69,776
Essex Property Trust, Inc.		73		25,713
The Estee Lauder Cos., Inc. Class A		809		299,492
Expedia Group, Inc. (e)		2,963		535,473
Extra Space Storage, Inc.		51		11,563
Exxon Mobil Corp.		4,991		305,399
FedEx Corp.		1,758		454,689
Fidelity National Information Services, Inc.		303		33,072
Floor & Decor Holdings, Inc. Class A (e)		4,007		520,950
FMC Corp.		576		63,297
Ford Motor Co.		23,883		496,050
Fortinet, Inc. (e)		2,724		979,006
Fortive Corp.		54,117		4,128,586
Fortune Brands Home & Security, Inc.		3,660		391,254
Franklin Resources, Inc.		2,024		67,784
Freeport-McMoRan, Inc.		83,749		3,494,846
Frontier Communications Parent, Inc. (e)		11,618		342,615
Gartner, Inc. (e)		135		45,133
Generac Holdings, Inc. (e)		1,298		456,792
General Motors Co. (e)		17,876		1,048,070
Genuine Parts Co.		367		51,453
Gilead Sciences, Inc.		241		17,499
Gitlab, Inc. (e)		58		5,046
Global Payments, Inc.		84		11,355
Globe Life, Inc.		121		11,340
Gores Holdings VIII, Inc. (e)		6,535		66,657
Green Plains, Inc. (e)		3,903		135,668
Hasbro, Inc.		157		15,979
HCA Healthcare, Inc.		573		147,215
Hess Corp.		341		25,244
Hewlett Packard Enterprise Co.		3,248		51,221
Hilton Worldwide Holdings, Inc. (e)		12,388		1,932,404
Hologic, Inc. (e)		402		30,777
Honeywell International, Inc.		69		14,387
HP, Inc.		1,203		45,317
Humana, Inc.		21		9,741
IDEXX Laboratories, Inc. (e)		119		78,357
Informatica, Inc. (e)		9,928		367,137
Ingersoll Rand, Inc.		311		19,242
International Flavors & Fragrances, Inc.		12,096		1,822,262
International Paper Co.		325		15,269
Intuit, Inc.		115		73,970
Intuitive Surgical, Inc. (e)		5,705		2,049,806
IQVIA Holdings, Inc. (e)		125		35,268
Johnson & Johnson		32,401		5,542,839
JP Morgan Chase & Co.		976		154,550
Khosla Ventures Acquisition Co. (e)		21,089		204,563
Kinder Morgan, Inc.		1,739		27,581
The Kroger Co.		708		32,044
Lam Research Corp.		138		99,243

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Number of Shares		Value
Leidos Holdings, Inc.		251	$	22,314
Lennar Corp. Class A		193		22,419
Liberty Broadband Corp. Class C (e)		64		10,310
Liberty Media Acquisition Co. (e)		41,914		444,708
Liberty Media Corp-Liberty SiriusXM Class A (e)		23,363		1,188,009
Liberty Media Corp-Liberty SiriusXM Class C (e)		32,331		1,644,031
Live Nation Entertainment, Inc. (e)		4,288		513,231
LKQ Corp.		1,055		63,332
Lookout, Inc. (Acquired 3/04/15, Cost $42,391) (b) (c) (d) (e)		3,711		40,895
Lowe's Cos., Inc.		7,114		1,838,827
Lululemon Athletica, Inc. (e)		213		83,379
Marsh & McLennan Cos., Inc.		23,996		4,170,985
Masco Corp.		48,247		3,387,904
Masimo Corp. (e)		1,937		567,115
Mastercard, Inc. Class A		13,330		4,789,736
McDonald's Corp.		13,249		3,551,659
MercadoLibre, Inc. (e)		1,715		2,312,506
Merck & Co., Inc.		998		76,487
Meta Platforms, Inc. Class A (e)		6,321		2,126,068
Mettler-Toledo International Inc (e)		80		135,777
Micron Technology, Inc.		24,042		2,239,512
Microsoft Corp. (h)		50,282		16,910,842
Moderna, Inc. (e)		1,722		437,354
Mondelez International Inc. Class A		104		6,896
MongoDB, Inc. (e)		872		461,593
Monolithic Power Systems, Inc.		36		17,760
Moody's Corp.		33		12,889
Morgan Stanley		33,479		3,286,299
The Mosaic Co.		1,441		56,617
Motorola Solutions, Inc.		34		9,238
MSCI, Inc.		13		7,965
Netflix, Inc. (e)		149		89,764
New Relic, Inc. (e)		3,710		407,952
Newmont Corp.		132		8,187
NextEra Energy, Inc.		57,050		5,326,188
NIKE, Inc. Class B		3,348		558,011
Northern Trust Corp.		499		59,685
NortonLifeLock, Inc.		2,095		54,428
NVIDIA Corp.		12,207		3,590,201
NVR, Inc. (e)		2		11,818
O'Reilly Automotive, Inc. (e)		885		625,014
Okta, Inc. (e)		2,129		477,258
ONEOK, Inc.		1,165		68,455
Oracle Corp.		178		15,523
Otis Worldwide Corp.		797		69,395
Palantir Technologies, Inc. (e)		1,887		34,362
Palo Alto Networks, Inc. (e)		1,691		941,481
Park Hotels & Resorts, Inc. (e)		3,553		67,081
Parker Hannifin Corp.		5,888		1,873,091
PayPal Holdings, Inc. (e)		7,685		1,449,237
Peloton Interactive, Inc. Class A (e)		16,836		602,055
Penn National Gaming, Inc. (e)		4,601		238,562
PepsiCo, Inc.		2,538		440,876
Petco Health & Wellness Co., Inc. (a) (e)		5,799		114,762
Philip Morris International, Inc.		747		70,965
Pinterest, Inc. Class A (e)		677		24,609
Playtika Holding Corp. (e)		49,574		857,134
The PNC Financial Services Group, Inc.		225		45,117

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Number of Shares		Value
PPG Industries, Inc.		22,661	$	3,907,663
Prologis, Inc.		1,080		181,829
Public Storage		51		19,103
PVH Corp.		3,002		320,163
QUALCOMM, Inc.		3,826		699,661
Raytheon Technologies Corp.		170		14,630
Regeneron Pharmaceuticals, Inc. (e)		1,426		900,548
ResMed, Inc.		2,663		693,658
RingCentral, Inc. Class A (e)		443		82,996
Rivian Automotive, Inc. (e)		12,142		1,259,004
Robert Half International, Inc.		175		19,516
Rockwell Automation, Inc.		279		97,329
Roku, Inc. (e)		26		5,933
Rollins, Inc.		234		8,005
S&P Global, Inc.		1,048		494,583
salesforce.com, Inc. (e)		20,733		5,268,877
SBA Communications Corp.		414		161,054
Seagen, Inc. (e)		6,384		986,966
Sempra Energy		27,645		3,656,881
ServiceNow, Inc. (e)		5,483		3,559,070
Skyworks Solutions, Inc.		120		18,617
SmartRent, Inc. (e)		24,601		238,138
Snap-on, Inc.		256		55,137
Snowflake, Inc. Class A (e)		153		51,829
Sonos, Inc. (e)		20,833		620,823
The Southern Co.		299		20,505
Southwest Airlines Co. (e)		928		39,756
Splunk, Inc. (e)		1,341		155,181
Starbucks Corp.		135		15,791
Starwood Property Trust, Inc.		12,558		305,159
State Street Corp.		184		17,112
Stryker Corp.		1,518		405,944
Synopsys, Inc. (e)		46		16,951
T-Mobile US, Inc. (e)		44		5,103
T. Rowe Price Group, Inc.		267		52,503
Target Corp.		171		39,576
Teledyne Technologies, Inc. (e)		51		22,281
Tesla, Inc. (e)		153		161,687
The The Home Depot, Inc.		9,406		3,903,584
Thermo Fisher Scientific, Inc.		8,268		5,516,740
The TJX Cos., Inc.		43,470		3,300,242
Toast, Inc., Class A (e)		13,416		465,669
TransDigm Group, Inc. (e)		1,113		708,180
Trimble, Inc. (e)		242		21,100
Twilio, Inc. Class A (e)		2,671		703,381
Twitter, Inc. (e)		854		36,910
U.S. Bancorp		6,132		344,434
Uber Technologies, Inc. (e)		5,047		211,621
UDR, Inc.		283		16,977
Ulta Beauty, Inc. (e)		659		271,732
United Parcel Service, Inc. Class B		22,510		4,824,793
United Rentals, Inc. (e)		1,213		403,068
United States Oil Fund LP (e) (i)		5,869		319,039
United States Steel Corp. (a)		8,964		213,433
UnitedHealth Group, Inc.		16,701		8,386,240
Vail Resorts, Inc.		182		59,678
Valero Energy Corp.		33,405		2,509,050
VeriSign, Inc. (e)		2,866		727,448

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Number of Shares		Value
Verisk Analytics, Inc.		2,491	$	569,766
Verizon Communications, Inc.		3,861		200,618
Vertex Pharmaceuticals, Inc. (e)		271		59,512
Vertiv Holdings Co.		116,203		2,901,589
VF Corp.		1,072		78,492
Victoria's Secret & Co. (e)		2,640		146,626
Visa, Inc. Class A		54		11,702
VMware, Inc. Class A		770		89,228
Vulcan Materials Co.		17,443		3,620,818
W.R. Berkley Corp.		167		13,759
Walmart, Inc.		11,387		1,647,585
The Walt Disney Co. (e)		26,849		4,158,642
Waters Corp. (e)		210		78,246
Western Digital Corp. (e)		9,410		613,626
Weyerhaeuser Co.		10,466		430,990
Williams-Sonoma, Inc.		8,137		1,376,211
WillScot Mobile Mini Holdings Corp. (e)		11,737		479,339
Workday, Inc. Class A (e)		1,635		446,649
Wynn Resorts Ltd. (e)		1,039		88,357
Xilinx, Inc.		5,452		1,155,988
Yum China Holdings, Inc.		2,752		137,160
Yum! Brands, Inc.		299		41,519
Zebra Technologies Corp. Class A (e)		112		66,662
Zimmer Biomet Holdings, Inc.		640		81,306
Zoetis, Inc.		3,070		749,172
Zoom Video Communications, Inc. Class A (e)		303		55,725
Zscaler, Inc. (e)		2,635		846,705
				298,277,742
TOTAL COMMON STOCK (Cost $352,998,422)				455,168,220
PREFERRED STOCK — 1.0%
Brazil — 0.0%
Banco Bradesco SA 4.760%
		24,069		83,027
Itau Unibanco Holding SA 4.630%
BRL		3,762		14,308
Petroleo Brasileiro SA 21.130%
		10,021		50,851
				148,186
Germany — 0.2%
Henkel AG & Co. KGaA, 21.130%
EUR		145		11,742
Porsche Automobil Holding SE 2.510%
		3,156		299,503
Volkswagen AG 2.540%
		4,231		855,040
				1,166,285
United Kingdom — 0.1%
Aptiv PLC, Convertible
5.500%		3,561		655,545

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Number of Shares		Value
United States — 0.7%
2020 Cash Mandatory Exchangeable Trust, Convertible
5.250% (f)		914	$	955,176
Becton Dickinson and Co., Convertible
6.000% (a)		13,598		717,295
Boston Scientific Corp., Convertible
5.500%		2,343		268,648
Citigroup Capital XIII, 3 mo. USD LIBOR + 6.370%
6.499% VRN		16,932		472,403
Databricks, Inc., Series F (Acquired 10/22/19, Cost $283,760)
(b) (c) (d) (e)		6,607		1,337,389
Grand Rounds, Inc., Series C (Acquired 3/31/15, Cost $336,853)
(b) (c) (d) (e)		121,323		306,947
Grand Rounds, Inc., Series D (Acquired 5/01/18, Cost $185,458)
(b) (c) (d) (e)		76,520		192,065
Lookout, Inc., Series F (Acquired 9/19/14-10/22/14, Cost $628,910)
(b) (c) (d) (e)		55,056		606,717
Wells Fargo & Co. Series L 1.06%
7.500%		153		228,051
				5,084,691
TOTAL PREFERRED STOCK (Cost $5,850,915)				7,054,707
TOTAL EQUITIES (Cost $358,849,337)				462,222,927
	Principal Amount
BONDS & NOTES — 15.7%
BANK LOANS — 3.1%
Canada — 0.1%
Bausch Health Cos., Inc., 2018 Term Loan B, 1 mo. USD LIBOR + 3.000%
3.104% VRN 6/02/25	$	282,357		280,875
Kronos Acquisition Holdings, Inc., 2021 1st Lien Term Loan,
0.000% 12/22/26 (j)		52,000		51,513
Raptor Acquisition Corp., 2021 Term Loan, 3 mo. USD LIBOR + 4.000%
4.750% VRN 11/01/26		80,000		80,150
				412,538
France — 0.3%
Babilou Group, 2021 EUR Term Loan B, EURIBOR + 4.000%
4.000% VRN 11/30/27 EUR (g)		713,000		811,547
Cablevision Lightpath LLC, Term Loan B, 3 mo. USD LIBOR + 3.250%
3.750% VRN 11/30/27		63,360		63,201
IRB Holding Corp, 2020 Fourth Amendment Incremental Term Loan, 3 mo. USD LIBOR + 3.250%
4.250% VRN 12/15/27		398,526		398,151
LBM Acquisition LLC, Term Loan B, 1 mo. USD LIBOR + 3.750%
4.500% VRN 12/17/27		475,924		471,241
White Cap Buyer LLC, Term Loan B, 1 mo. USD LIBOR + 4.000%
4.500% VRN 10/19/27		442,530		442,579
				2,186,719

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
Luxembourg — 0.0%
AEA International Holdings (Lux) SARL, Term Loan B, 3 mo. USD LIBOR + 3.750%
4.250% VRN 9/07/28	$	101,459	$	101,459
Cobham Ultra SeniorCo S.a.r.l, USD Term Loan B,
0.000% 11/16/28 (j)		38,000		37,846
				139,305
Netherlands — 0.2%
The Stars Group Holdings B.V., 2018 USD Incremental Term Loan, 3 mo. USD LIBOR + 2.250%
2.474% VRN 7/21/26		497,848		495,742
Ziggo BV, 2019 Term Loan H, EURIBOR + 3.000%
3.000% VRN 1/31/29 EUR (g)		1,017,786		1,141,148
				1,636,890
United Kingdom — 0.1%
Constellation Automotive Ltd. SONIA CMPD + 7.500%
7.500% VRN 7/30/29 GBP		110,000		150,239
GVC Holdings (Gibraltar) Lld., 2021 USD Term Loan B4, 3 mo. USD LIBOR + 2.500%
3.000% VRN 3/16/27		460,685		459,073
				609,312
United States — 2.4%
ACProducts, Inc., 2021 Term Loan B, 6 mo. USD LIBOR + 4.250%
4.750% VRN 5/17/28		367,155		361,648
Aimbridge Acquisition Co., Inc., 2020 Incremental Term Loan B, 1 mo. USD LIBOR + 4.750%
5.500% VRN 2/02/26		247,506		245,650
Allied Universal Holdco LLC, 2021 USD Incremental Term Loan B, 3 mo. USD LIBOR + 3.750%
4.250% VRN 5/12/28		33,915		33,767
Altar Bidco, Inc., 2021 Term Loan,
0.000% 11/17/28 (j)		185,000		184,306
American Rock Salt Co. LLC, 2021 Term Loan, 1 mo. USD LIBOR + 4.000%
4.750% VRN 6/04/28		90,773		90,432
Applied Systems, Inc., 2017 1st Lien Term Loan, 3 mo. USD LIBOR + 3.000%, PRIME + 2.000%
3.500% - 5.250% VRN 9/19/24		46,000		45,954
Athenahealth, Inc., 2021 Term Loan B1, 3 mo. USD LIBOR + 4.250%
4.400% VRN 2/11/26		70,468		70,397
Avantor Funding, Inc., 2021 Term Loan B5, 1 mo. USD LIBOR + 2.250%
2.750% VRN 11/08/27		168,282		168,071
Avaya, Inc.
2021 Term Loan B2, 3 mo. USD LIBOR + 4.000%
4.110% VRN 12/15/27		85,000		84,872
2020 Term Loan B, 3 mo. USD LIBOR + 4.250%
4.360% VRN 12/15/27		110,410		110,618
Caesars Resort Collection LLC, 2020 Term Loan B1, 1 mo. USD LIBOR + 3.500%
3.604% VRN 7/21/25		115,538		115,509
Change Healthcare Holdings LLC, 2017 Term Loan B, 1 mo. USD LIBOR + 2.500%
3.500% FRN 3/01/24		58,585		58,519

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
City Brewing Co., LLC, Closing Date Term Loan, 3 mo. USD LIBOR + 3.500%
4.250% VRN 4/05/28	$	266,000	$	251,258
Columbus McKinnon Corp., 2021 Term Loan B, 3 mo. USD LIBOR + 2.750%
3.250% VRN 5/14/28		28,257		28,257
Conair Holdings, LLC, Term Loan B, 3 mo. USD LIBOR + 3.750%
4.250% VRN 5/17/28		118,703		118,638
ConnectWise, LLC, 2021 Term Loan B, 3 mo. USD LIBOR + 3.500%
4.000% VRN 9/29/28		116,000		115,607
Davis-Standard, LLC, Term Loan,
0.000% 12/10/28 (j)		156,000		151,710
Digital Room Holdings, Inc., 2021 Term Loan,
0.000% 12/15/28 (j)		97,000		96,181
DirecTV Financing, LLC, Term Loan, 3 mo. USD LIBOR + 5.000%
5.750% VRN 8/02/27		374,383		374,491
DT Midstream, Inc., Term Loan B, 3 mo. USD LIBOR + 2.000%, 6 mo. USD LIBOR + 2.000%
2.500% VRN 6/26/28		244,770		245,115
The Dun & Bradstreet Corp., Term Loan, 1 mo. USD LIBOR + 3.250%
3.352% VRN 2/06/26		109,197		108,690
ECL Entertainment, LLC, Term Loan, 1 mo. USD LIBOR + 7.500%
8.250% VRN 3/31/28		175,120		177,747
Fanatics Commerce Intermediate Holdco, LLC, Term Loan B, 3 mo. USD LIBOR + 3.250%
3.750% VRN 11/24/28		129,000		128,194
Flexera Software LLC, 2021 Term Loan B, 3 mo. USD LIBOR + 3.750%
4.500% VRN 3/03/28		74,547		74,537
Foundation Building Materials Holding Co. LLC, 2021 Term Loan, 3 mo. USD LIBOR + 3.250%
3.750% VRN 2/03/28		84,257		83,595
Frontier Communications Corp., 2021 DIP Term Loan B, 3 mo. USD LIBOR + 3.750%
4.500% VRN 5/01/28		224,011		223,563
Gray Television, Inc. ., 2021 Term Loan D, 1 mo. USD LIBOR + 3.000%
3.099% VRN 12/01/28		430,000		427,527
Herschend Entertainment Co. LLC, 2021 Term Loan, 1 mo. USD LIBOR + 3.750%
4.250% VRN 8/27/28		105,735		105,426
Hilton Grand Vacations Borrower LLC, 2021 Term Loan B, 1 mo. USD LIBOR + 3.000%
3.500% VRN 8/02/28		502,740		503,117
Hilton Worldwide Finance LLC, 2019 Term Loan B2, 1 mo. USD LIBOR + 1.750%
1.852% VRN 6/22/26		491,275		486,819
Hydrofarm Holdings LLC, 2021 Term Loan, 3 mo. USD LIBOR + 5.500%
5.678% VRN 9/27/28		73,000		70,810
Informatica LLC, 2021 USD Term Loan B, 1 mo. USD LIBOR + 2.750%
2.875% VRN 10/27/28		323,000		321,559
IPS Corp.
2021 Term Loan,
0.000% 10/02/28 (j)		41,964		41,859
2021 Delayed Draw Term Loan,
0.000% 10/02/28 (j) (k)		8,393		8,372
ITT Holdings LLC, 2021 Term Loan, 1 mo. USD LIBOR + 2.750%
3.250% VRN 7/10/28		131,670		130,880
J&J Ventures Gaming, LLC, Term Loan, 1 mo. USD LIBOR + 4.000%
4.750% VRN 4/26/28		218,000		218,000

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
Jack Ohio Finance LLC, Term Loan, 1 mo. USD LIBOR + 4.750%
4.854% VRN 10/04/28	$	68,000	$	67,788
Jazz Financing Lux SARL, USD Term Loan, 1 mo. USD LIBOR + 3.500%
4.000% VRN 5/05/28		443,457		444,871
Jeld-Wen, Inc., 2021 Term Loan B, 1 mo. USD LIBOR + 2.250%
2.351% VRN 7/28/28		314,212		313,820
Jo-Ann Stores, Inc., 2021 Term Loan B1, 3 mo. USD LIBOR + 4.750%
5.500% VRN 7/07/28		242,393		239,515
Knowlton Development Corp., Inc., 2020 EUR Term Loan B, EURIBOR + 5.000%
5.000% VRN 12/22/25 EUR (g)		622,310		710,051
Leslie's Poolmart, Inc., 2021 Term Loan B, 3 mo. USD LIBOR + 2.500%
3.000% VRN 3/09/28		324,831		323,382
LogMeIn, Inc., Term Loan B, 1 mo. USD LIBOR + 4.750%
4.839% VRN 8/31/27		333,335		331,158
LSF11 A5 Holdco LLC, Term Loan, 3 mo. USD LIBOR + 3.750%
4.250% VRN 10/15/28		189,000		188,684
Maverick Gaming LLC, Term Loan B, 3 mo. USD LIBOR + 7.500%
8.500% VRN 9/03/26		95,000		95,119
McAfee LLC, 2018 USD Term Loan B, 1 mo. USD LIBOR + 3.750%
3.852% VRN 9/30/24		64,087		64,123
Medical Solutions LLC, 2021 2nd Lien Term Loan, 3 mo. USD LIBOR + 7.000%
7.500% VRN 11/01/29		52,000		51,307
Medline Borrower, LP, USD Term Loan B, 1 mo. USD LIBOR + 3.250%
3.750% FRN 10/23/28		444,000		443,805
Metronet Systems Holdings LLC, 2021 1st Lien Term Loan, 1 mo. USD LIBOR + 3.750%
4.500% VRN 5/26/28		71,836		71,782
Michaels Cos. Inc., 2021 Term Loan B, 3 mo. USD LIBOR + 4.250%
5.000% VRN 4/15/28		175,120		173,400
MIP V Waste Holdings, LLC, Term Loan B,
0.000% 12/08/28 (j)		87,000		86,674
Organon & Co, USD Term Loan, 3 mo. USD LIBOR + 3.000%
3.500% VRN 6/02/28		225,615		225,662
OVG Business Services, LLC, Initial Term Loan, 3 mo. USD LIBOR + 6.250%
7.250% VRN 10/13/28		193,000		190,105
Pacific Gas & Electric Co., 2020 Term Loan, 3 mo. USD LIBOR + 3.000%
3.500% VRN 6/23/25		219,975		217,335
Park River Holdings, Inc., Term Loan, 3 mo. USD LIBOR + 3.250%
4.000% VRN 12/28/27		207,082		204,978
Peraton Corp., Term Loan B, 1 mo. USD LIBOR + 3.750%
4.500% VRN 2/01/28		103,697		103,660
Playtika Holding Corp., 2021 Term Loan, 1 mo. USD LIBOR + 2.750%
2.854% VRN 3/13/28		535,234		532,333
Project Ruby Ultimate Parent Corp., 2021 Term Loan, 1 mo. USD LIBOR + 3.250%
4.000% VRN 3/03/28		301,720		301,216
Proofpoint, Inc., 1st Lien Term Loan, 3 mo. USD LIBOR + 3.250%
3.750% VRN 8/31/28		69,000		68,661
RealPage, Inc., 1st Lien Term Loan, 1 mo. USD LIBOR + 3.250%
3.750% VRN 4/24/28		178,000		177,361
Redstone Buyer LLC
2021 Term Loan, 3 mo. USD LIBOR + 4.750%
5.500% VRN 4/27/28		332,000		316,333
2021 2nd Lien Term Loan, 3 mo. USD LIBOR + 7.750%
8.500% VRN 4/27/29		182,000		167,136

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
Rexnord LLC, 2021 Term Loan B, 1 mo. USD LIBOR + 2.250%
2.750% VRN 10/04/28	$	18,000	$	17,994
SCIH Salt Holdings, Inc., 2021 Incremental Term Loan B, 3 mo. USD LIBOR + 4.000%
4.750% VRN 3/16/27		390,432		386,204
SeaWorld Parks & Entertainment, Inc., 2021 Term Loan B, 1 mo. USD LIBOR + 3.000%
3.500% VRN 8/25/28		415,958		413,878
Select Medical Corp., 2017 Term Loan B, 1 mo. USD LIBOR + 2.250%
2.360% VRN 3/06/25		141,646		140,584
Shearer's Foods, Inc., 2021 Term Loan, 1 mo. USD LIBOR + 3.500%
4.250% VRN 9/23/27		219,207		218,323
Signal Parent, Inc., Term Loan B, 1 mo. USD LIBOR + 3.500%
4.250% VRN 4/03/28		276,610		268,312
Southwestern Energy Co., 2021 Term Loan, SOFR + 2.500%
3.000% 6/22/27		24,000		24,015
Sovos Brands Intermediate, Inc., 2021 Term Loan, 3 mo. USD LIBOR + 3.750%
4.500% VRN 6/08/28		68,163		68,063
SRS Distribution, Inc., 2021 Term Loan B, 3 mo. USD LIBOR + 3.750%
4.250% VRN 6/02/28		412,965		411,648
Surf Holdings, LLC, USD Term Loan, 3 mo. USD LIBOR + 3.500%
3.690% VRN 3/05/27		227,602		225,579
The The Enterprise Development Authority, Term Loan B, 1 mo. USD LIBOR + 4.250%
5.000% VRN 2/28/28		369,525		368,756
Tory Burch LLC, Term Loan B, 1 mo. USD LIBOR + 3.000%
3.500% VRN 4/16/28		176,550		176,108
Triton Water Holdings, Inc., Term Loan, 3 mo. USD LIBOR + 3.500%
4.000% VRN 3/31/28		279,658		276,352
Twin River Worldwide Holdings, Inc., 2021 Term Loan B, 6 mo. USD LIBOR + 3.250%
3.750% VRN 10/02/28		388,000		387,837
Ultimate Software Group, Inc., 2021 Term Loan, 3 mo. USD LIBOR + 3.250%
3.750% VRN 5/04/26		120,093		119,379
Univision Communication, Inc.
2021 Term Loan B,
0.000% 5/05/28 (j)		125,000		124,687
2021 First Lien Term Loan B, 1 mo. USD LIBOR + 3.250%
4.000% VRN 3/15/26		74,813		74,883
Valcour Packaging LLC, 2021 1st Lien Term Loan, 3 mo. USD LIBOR + 3.750%
4.250% VRN 10/04/28		51,000		50,936
VS Buyer, LLC, Term Loan B, 1 mo. USD LIBOR + 3.000%
3.104% VRN 2/28/27		158,676		157,816
WIN Waste Innovations Holdings, Inc., 2021 Term Loan B, 3 mo. USD LIBOR + 2.750%
3.250% VRN 3/24/28		97,510		97,242
WOOF Holdings, Inc., 1st Lien Term Loan, 3 mo. USD LIBOR + 3.750%
4.500% VRN 12/21/27		168,403		168,403
				16,348,953
TOTAL BANK LOANS (Cost $21,407,414)				21,333,717

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
CORPORATE DEBT — 5.2%
Argentina — 0.0%
Genneia SA
8.750% 9/02/27 (f)	$	56,800	$	53,619
Australia — 0.3%
Quintis (Australia) Pty Limited First Lien Note (Acquired 7/20/16-10/01/20, Cost $1,123,715)
7.500% 10/01/26 (b) (c) (d) (f)		1,176,001		1,176,001
Quintis (Australia) Pty Limited Second Lien Note (Acquired 7/20/16, Cost $1,077,000)
12.000% 10/01/28 (b) (c) (d) (f)		1,095,355		1,095,355
				2,271,356
Austria — 0.0%
Suzano Austria GmbH
3.125% 1/15/32		50,000		48,375
Bahrain — 0.0%
The Oil and Gas Holding Co. BSCC
7.625% 11/07/24 (f)		200,000		215,500
Bermuda — 0.0%
Inkia Energy Ltd.
5.875% 11/09/27 (f)		200,000		208,000
Brazil — 0.0%
Oi SA
10.000% 7/27/25		64,000		56,161
Canada — 0.1%
Bausch Health Cos., Inc.
4.875% 6/01/28 (f)		92,000		94,070
Bombardier, Inc.
7.125% 6/15/26 (f)		57,000		59,133
Brookfield Residential Properties, Inc. / Brookfield Residential US Corp.
6.250% 9/15/27 (f)		9,000		9,394
Brookfield Residential Properties, Inc. / Brookfield Residential US LLC
5.000% 6/15/29 (f)		53,000		53,037
First Quantum Minerals Ltd.
6.875% 10/15/27 (f)		200,000		215,250
Masonite International Corp.
5.375% 2/01/28 (f)		7,000		7,341
Mattamy Group Corp.
4.625% 3/01/30 (f)		120,000		122,214
				560,439
Cayman Islands — 0.1%
MAF Sukuk Ltd.
4.638% 5/14/29 (f)		200,000		221,708
Shelf Drilling Holdings Ltd.
8.875% 11/15/24 (f)		15,000		15,375
				237,083

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
Colombia — 0.1%
Ecopetrol SA
4.625% 11/02/31	$	45,000	$	43,749
Empresas Publicas de Medellin ESP
4.250% 7/18/29 (f)		200,000		189,702
				233,451
Germany — 0.2%
APCOA Parking Holdings GmbH 3 mo. EURIBOR + 5.000%
5.000% FRN 1/15/27 EUR (f) (g)		252,000		288,049
Douglas GmbH
6.000% 4/08/26 EUR (f) (g)		316,000		358,687
Kirk Beauty SUN GmbH
8.250% 10/01/26 EUR (f) (g)		229,238		249,243
KME SE
6.750% 2/01/23 EUR (a) (f) (g)		318,000		346,475
				1,242,454
India — 0.0%
Muthoot Finance Ltd.
6.125% 10/31/22 (f)		200,000		205,500
REI Agro, Ltd.
5.500% 11/13/14 (d) (f) (l)		618,000		5,166
				210,666
Indonesia — 0.0%
Pertamina Persero PT
3.650% 7/30/29 (f)		200,000		212,258
Ireland — 0.0%
ASG Finance Designated Activity Co.
7.875% 12/03/24 (f)		200,000		196,000
Israel — 0.0%
Bank Leumi Le-Israel BM 5 year CMT + 1.631%
3.275% VRN 1/29/31 (f)		200,000		200,250
Italy — 0.1%
Marcolin SpA
6.125% 11/15/26 EUR (f) (g)		274,000		317,706
Shiba Bidco SpA
4.500% 10/31/28 EUR (f) (g)		277,000		318,518
				636,224
Luxembourg — 0.2%
Garfunkelux Holdco 3 SA
6.750% 11/01/25 EUR (f) (g)		133,000		156,947
7.750% 11/01/25 GBP (f) (g)		226,000		317,756
Herens Midco Sarl
5.250% 5/15/29 EUR (f) (g)		317,000		338,495
Kenbourne Invest SA
6.875% 11/26/24 (f)		200,000		208,000
Picard Bondco Co.
5.375% 7/01/27 EUR (f) (g)		230,000		263,492

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
Sani/Ikos Financial Holdings 1 Sarl
5.625% 12/15/26 EUR (f) (g)	$	213,000	$	245,944
				1,530,634
Mexico — 0.1%
Banco Mercantil del Norte SA 5 year CMT + 4.967%
6.750% VRN (f) (m)		200,000		207,102
BBVA Bancomer SA 5 year CMT + 2.650%
5.125% VRN 1/18/33 (f)		200,000		205,252
Grupo Bimbo SAB de CV 5 year CMT + 3.280%
5.950% VRN (a) (f) (m)		200,000		207,000
Petroleos Mexicanos
5.950% 1/28/31 (a)		63,000		61,219
6.375% 1/23/45		33,000		28,661
6.500% 3/13/27		94,000		100,283
6.700% 2/16/32 (f)		45,000		45,450
6.750% 9/21/47		59,000		52,362
				907,329
Netherlands — 0.1%
Bio City Development Co. B.V. (Acquired 7/05/11, Cost $1,400,000)
8.000% 7/06/21 (b) (c) (d) (f) (l)		1,400,000		110,320
Braskem Netherlands Finance BV 5 year CMT + 8.220%
8.500% VRN 1/23/81 (f)		200,000		232,500
Titan Holdings II BV
5.125% 7/15/29 EUR (f) (g)		166,000		187,649
				530,469
Panama — 0.0%
Avianca Holdings SA
9.000% 3/31/22 (f)		38,993		39,285
Switzerland — 0.1%
Credit Suisse Group AG 5 year CMT + 4.822%
6.375% VRN (f) (m)		200,000		215,560
UBS Group AG 5 year USD Swap + 4.344%
7.000% VRN (f) (m)		200,000		215,650
				431,210
United Kingdom — 0.5%
BCP V Modular Services Finance II PLC
6.125% 11/30/28 GBP (f) (g)		346,000		465,987
BCP V Modular Services Finance PLC
6.750% 11/30/29 EUR (f) (g)		461,000		516,319
Boparan Finance PLC
7.625% 11/30/25 GBP (a) (f) (g)		230,000		257,614
Constellation Automotive Financing PLC
4.875% 7/15/27 GBP (f) (g)		100,000		133,149
Deuce Finco PLC
5.500% 6/15/27 GBP (f) (g)		597,000		802,145
Ellaktor Value PLC
6.375% 12/15/24 EUR (f) (g)		420,000		455,871
Inspired Entertainment Financing PLC
7.875% 6/01/26 GBP (f) (g)		197,000		271,982
Vodafone Group PLC 5 year CMT + 2.767%
4.125% VRN 6/04/81		104,000		102,956

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
Wheel Bidco Ltd.
6.750% 7/15/26 GBP (f) (g)	$	109,000	$	144,586
				3,150,609
United States — 3.3%
Acadia Healthcare Co., Inc.
5.000% 4/15/29 (f)		18,000		18,495
5.500% 7/01/28 (f)		22,000		23,124
Affinity Gaming
6.875% 12/15/27 (f)		68,000		70,720
Air Lease Corp.
3.125% 12/01/30		129,000		131,765
Albertsons Cos., Inc./Safeway, Inc./New Albertsons LP/Albertson's LLC
3.500% 3/15/29 (f)		318,000		318,623
Ally Financial, Inc. 5 year CMT + 3.868%
4.700% VRN (a) (m)		101,000		104,788
AMC Networks, Inc.
4.750% 8/01/25		11,000		11,234
5.000% 4/01/24		6,000		6,045
American Express Co. 5 year CMT + 2.854%
3.550% VRN (m)		105,000		105,184
AMN Healthcare, Inc.
4.000% 4/15/29 (f)		23,000		23,316
Aramark Services, Inc.
5.000% 2/01/28 (f)		15,000		15,506
Ashton Woods USA LLC / Ashton Woods Finance Co.
4.625% 8/01/29 (f)		39,000		38,513
Avantor Funding, Inc.
4.625% 7/15/28 (f)		59,000		61,508
Avaya, Inc.
6.125% 9/15/28 (a) (f)		160,000		169,600
Aviation Capital Group LLC
1.950% 9/20/26 (f)		107,000		103,993
Bank of America Corp.
SOFR + 1.320% 2.687% VRN 4/22/32		129,000		131,060
3 mo. USD LIBOR + 3.292% 5.125% VRN (m)		100,000		104,625
Blue Racer Midstream LLC / Blue Racer Finance Corp.
7.625% 12/15/25 (f)		27,000		28,620
Bristow Group, Inc.
6.875% 3/01/28 (f)		118,000		122,746
Broadcom, Inc.
1.950% 2/15/28 (f)		34,000		33,641
Buckeye Partners LP
4.125% 3/01/25 (f)		125,000		129,063
Caesars Entertainment, Inc.
4.625% 10/15/29 (f)		57,000		57,000
6.250% 7/01/25 (f)		361,000		378,915
Caesars Resort Collection LLC / CRC Finco Inc.
5.750% 7/01/25 (f)		73,000		76,235
Capital One Financial Corp. 5 year CMT + 3.157%
3.950% VRN (m)		103,000		103,515
Carrols Restaurant Group, Inc.
5.875% 7/01/29 (a) (f)		40,000		36,000
Cedar Fair LP
5.250% 7/15/29 (a)		7,000		7,175
Cedar Fair LP / Canada's Wonderland Co. / Magnum Management Corp. / Millennium Op
5.375% 4/15/27		7,000		7,175

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
Centene Corp.
2.450% 7/15/28	$	240,000	$	236,400
2.625% 8/01/31		160,000		156,800
4.250% 12/15/27		35,000		36,488
Centennial Resource Production LLC
5.375% 1/15/26 (f)		15,000		14,700
CenturyLink, Inc.
5.125% 12/15/26 (f)		180,000		187,313
The Charles Schwab Corp. 5 year CMT + 3.168%
4.000% VRN (a) (m)		101,000		103,020
Charter Communications Operating LLC/Charter Communications Operating Capital
2.800% 4/01/31		200,000		197,867
3.900% 6/01/52		147,000		147,940
Cheniere Energy Partners LP
3.250% 1/31/32 (f)		18,000		18,180
Cheniere Energy, Inc.
4.625% 10/15/28		61,000		64,508
Chesapeake Energy Corp.
5.500% 2/01/26 (f)		133,000		139,982
5.875% 2/01/29 (f)		25,000		26,744
Churchill Downs, Inc.
5.500% 4/01/27 (f)		9,000		9,270
Citigroup, Inc.
SOFR + 1.167% 2.561% VRN 5/01/32		96,000		96,608
SOFR + 3.914% 4.412% VRN 3/31/31		170,000		194,338
SOFR + 3.234% 4.700% VRN (m)		102,000		103,040
Clean Harbors, Inc.
4.875% 7/15/27 (f)		8,000		8,240
Colgate Energy Partners III LLC
7.750% 2/15/26 (f)		44,000		47,520
Colt Merger Sub, Inc.
8.125% 7/01/27 (f)		215,000		237,922
CrownRock LP / CrownRock Finance, Inc.
5.625% 10/15/25 (f)		15,000		15,338
CSC Holdings LLC
4.125% 12/01/30 (f)		255,000		248,944
4.625% 12/01/30 (f)		416,000		393,640
Dana, Inc.
4.250% 9/01/30		27,000		27,371
Darling Ingredients, Inc.
5.250% 4/15/27 (f)		7,000		7,228
DaVita, Inc.
3.750% 2/15/31 (f)		406,000		394,835
4.625% 6/01/30 (f)		228,000		233,415
Directv Financing LLC / Directv Financing Co-Obligor, Inc.
5.875% 8/15/27 (f)		20,000		20,467
DISH DBS Corp.
5.250% 12/01/26 (f)		195,000		198,003
Edison International 5 year CMT + 4.698%
5.375% VRN (m)		104,000		108,950
Emergent BioSolutions, Inc.
3.875% 8/15/28 (a) (f)		11,000		10,557
Endeavor Energy Resources LP / EER Finance, Inc.
5.750% 1/30/28 (f)		13,000		13,771
Equinix, Inc.
2.500% 5/15/31		59,000		59,027
Ford Motor Co.
3.250% 2/12/32		63,000		64,512

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
Forestar Group, Inc.
3.850% 5/15/26 (f)	$	48,000	$	48,120
5.000% 3/01/28 (f)		322,000		330,452
The Fresh Market, Inc.
9.750% 5/01/23 (f)		87,000		89,501
Front Range BidCo, Inc.
4.000% 3/01/27 (f)		120,000		118,200
Frontier Communications Holdings LLC
5.000% 5/01/28 (f)		143,000		147,290
5.875% 10/15/27 (f)		60,000		63,450
6.750% 5/01/29 (f)		227,000		236,080
Frontier North, Inc.
6.730% 2/15/28		50,000		53,000
Full House Resorts, Inc.
8.250% 2/15/28 (f)		23,000		24,150
GCI LLC
4.750% 10/15/28 (f)		38,000		38,998
General Motors Financial Co., Inc.
2.700% 8/20/27		228,000		232,068
5 year CMT + 4.997% 5.700% VRN (m)		93,000		106,020
Genesis Energy LP / Genesis Energy Finance Corp.
8.000% 1/15/27		31,000		31,947
The Goldman Sachs Group, Inc.
SOFR + 1.281% 2.615% VRN 4/22/32		274,000		276,280
5 year CMT + 2.969% 3.800% VRN (m)		104,000		103,480
Great Western Petroleum LLC / Great Western Finance Corp.
12.000% 9/01/25 (f)		30,000		31,500
HCA, Inc.
3.500% 9/01/30		117,000		123,654
5.375% 2/01/25		131,000		143,969
5.875% 2/01/29		13,000		15,490
Hilton Domestic Operating Co., Inc.
3.625% 2/15/32 (f)		381,000		378,996
Hilton Worldwide Finance LLC/Hilton Worldwide Finance Corp.
4.875% 4/01/27		8,000		8,240
Hologic, Inc.
3.250% 2/15/29 (f)		220,000		220,000
Howard Hughes Corp.
4.125% 2/01/29 (f)		96,000		97,282
4.375% 2/01/31 (f)		106,000		107,060
5.375% 8/01/28 (f)		185,000		197,033
iHeartCommunications, Inc.
5.250% 8/15/27 (f)		10,000		10,401
6.375% 5/01/26		11,313		11,737
Iron Mountain, Inc.
4.500% 2/15/31 (f)		266,000		268,844
5.250% 7/15/30 (f)		153,000		161,235
JBS USA LUX SA/JBS USA Finance, Inc.
6.500% 4/15/29 (f)		21,000		23,100
6.750% 2/15/28 (f)		14,000		15,103
Joseph T Ryerson & Son, Inc.
8.500% 8/01/28 (f)		16,000		17,400
JP Morgan Chase & Co. SOFR + 3.125%
4.600% VRN (m)		302,000		309,927
Legends Hospitality Holding Co LLC / Legends Hospitality Co-Issuer, Inc.
5.000% 2/01/26 (f)		12,000		12,060
Level 3 Financing, Inc.
3.625% 1/15/29 (f)		252,000		239,400

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
4.250% 7/01/28 (f)	$	477,000	$	472,230
Lions Gate Capital Holdings LLC
5.500% 4/15/29 (f)		20,000		20,350
LogMeIn, Inc.
5.500% 9/01/27 (f)		65,000		65,780
Lumen Technologies, Inc.
5.375% 6/15/29 (a) (f)		179,000		179,000
Marriott Ownership Resorts, Inc.
6.125% 9/15/25 (f)		97,000		101,123
Meritor, Inc.
4.500% 12/15/28 (f)		2,000		2,005
MGM Growth Properties Operating Partnership LP / MGP Finance Co-Issuer, Inc.
3.875% 2/15/29 (f)		87,000		91,350
5.625% 5/01/24		15,000		16,031
Midwest Gaming Borrower LLC / Midwest Gaming Finance Corp.
4.875% 5/01/29 (f)		124,000		124,620
Molina Healthcare, Inc.
3.875% 11/15/30 (f)		34,000		35,275
Morgan Stanley 3 mo. USD LIBOR + 3.610%
3.734% VRN (m)		277,000		277,141
Mozart Debt Merger Sub, Inc.
3.875% 4/01/29 (f)		332,000		330,828
MPT Operating Partnership LP/MPT Finance Corp.
5.000% 10/15/27		20,000		20,925
Nationstar Mortgage Holdings, Inc.
5.125% 12/15/30 (f)		31,000		30,613
5.500% 8/15/28 (f)		54,000		55,080
The New Home Co., Inc.
7.250% 10/15/25 (f)		70,000		71,400
Nexstar Media, Inc.
4.750% 11/01/28 (f)		83,000		84,556
NRG Energy, Inc.
5.250% 6/15/29 (f)		10,000		10,714
5.750% 1/15/28		12,000		12,685
NuStar Logistics LP
5.750% 10/01/25		222,000		238,899
ONEOK Partners LP
4.900% 3/15/25		260,000		283,257
Oracle Corp.
3.950% 3/25/51		131,000		136,497
Outfront Media Capital LLC / Outfront Media Capital Corp.
5.000% 8/15/27 (f)		9,000		9,210
Pacific Gas and Electric Co.
2.100% 8/01/27		125,000		120,763
4.500% 7/01/40		92,500		96,566
4.550% 7/01/30		35,000		37,877
Park Intermediate Holdings LLC / PK Domestic Property LLC / PK Finance Co-Issuer
4.875% 5/15/29 (f)		173,000		176,892
5.875% 10/01/28 (f)		28,000		29,120
Parsley Energy LLC/Parsley Finance Corp.
5.625% 10/15/27 (f)		10,000		10,213
Party City Holdings, Inc.
8.750% 2/15/26 (f)		50,000		51,625
Peninsula Pacific Entertainment LLC / Peninsula Pacific Entertainment Finance In
8.500% 11/15/27 (f)		68,000		73,440
PG&E Corp.
5.000% 7/01/28		271,000		285,043

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
5.250% 7/01/30	$	28,000	$	29,364
Pilgrim's Pride Corp.
5.875% 9/30/27 (f)		12,000		12,671
Pitney Bowes, Inc.
6.875% 3/15/27 (f)		195,000		199,875
7.250% 3/15/29 (a) (f)		165,000		169,537
Playtika Holding Corp.
4.250% 3/15/29 (f)		56,000		54,880
Prudential Financial, Inc.
3 mo. USD LIBOR + 3.920% 5.625% VRN 6/15/43		143,000		148,806
3 mo. USD LIBOR + 4.175% 5.875% VRN 9/15/42		211,000		215,651
Radiate Holdco LLC / Radiate Finance, Inc.
4.500% 9/15/26 (f)		67,000		67,670
Rattler Midstream LP
5.625% 7/15/25 (f)		50,000		52,000
Renewable Energy Group, Inc.
5.875% 6/01/28 (f)		26,000		26,715
Rocket Mortgage LLC / Rocket Mortgage Co-Issuer, Inc.
3.625% 3/01/29 (f)		303,000		304,136
3.875% 3/01/31 (f)		234,000		237,510
Sabre GLBL, Inc.
9.250% 4/15/25 (f)		130,000		146,900
Select Medical Corp.
6.250% 8/15/26 (f)		514,000		544,254
Service Properties Trust
4.500% 6/15/23		230,000		229,887
5.000% 8/15/22		316,000		315,646
7.500% 9/15/25		31,000		33,600
Sirius XM Radio, Inc.
4.125% 7/01/30 (f)		182,000		182,000
5.000% 8/01/27 (f)		21,000		21,826
5.500% 7/01/29 (f)		18,000		19,395
Six Flags Entertainment Corp.
4.875% 7/31/24 (f)		14,000		14,140
SM Energy Co.
10.000% 1/15/25 (a) (f)		144,000		158,400
SRS Distribution, Inc.
4.625% 7/01/28 (f)		29,000		29,109
Standard Industries, Inc.
5.000% 2/15/27 (f)		7,000		7,206
Stem, Inc., Convertible,
0.500% 12/01/28 (f)		20,000		19,076
Summit Materials LLC / Summit Materials Finance Corp.
5.250% 1/15/29 (f)		15,000		15,711
Sunoco LP / Sunoco Finance Corp.
4.500% 5/15/29		32,000		32,497
4.500% 4/30/30 (f)		116,000		118,890
6.000% 4/15/27		8,000		8,343
Talen Energy Supply LLC
7.625% 6/01/28 (a) (f)		215,000		191,371
Tap Rock Resources LLC
7.000% 10/01/26 (f)		273,000		283,920
Targa Resources Partners LP/Targa Resources Partners Finance Corp.
4.000% 1/15/32 (f)		281,000		293,645
5.375% 2/01/27		7,000		7,214
5.875% 4/15/26		14,000		14,609
6.500% 7/15/27		11,000		11,792
6.875% 1/15/29		12,000		13,425

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
TEGNA, Inc.
4.750% 3/15/26 (f)	$	53,000	$	55,120
Teleflex, Inc.
4.625% 11/15/27		7,000		7,280
Tenet Healthcare Corp.
4.250% 6/01/29 (f)		445,000		451,893
4.375% 1/15/30 (f)		146,000		147,851
4.625% 9/01/24 (f)		8,000		8,180
4.625% 6/15/28 (f)		21,000		21,578
4.875% 1/01/26 (f)		29,000		29,787
6.250% 2/01/27 (f)		22,000		22,770
TransDigm, Inc.
6.250% 3/15/26 (f)		965,000		1,002,997
Travel & Leisure Co.
6.625% 7/31/26 (f)		54,000		59,877
United Airlines 2020-1 Class A Pass Through Trust
5.875% 4/15/29		506,751		555,195
United Rentals North America, Inc.
4.875% 1/15/28		23,000		24,170
5.500% 5/15/27		15,000		15,600
United Shore Financial Services LLC
5.500% 11/15/25 (f)		282,000		287,287
USB Capital IX 3 mo. USD LIBOR + 1.020%
3.500% VRN (m)		100,000		96,303
Venture Global Calcasieu Pass LLC
3.875% 11/01/33 (f)		85,000		89,267
Verizon Communications, Inc.
3.700% 3/22/61		86,000		93,650
VICI Properties LP / VICI Note Co., Inc.
3.500% 2/15/25 (f)		95,000		96,425
3.750% 2/15/27 (f)		95,000		98,120
4.125% 8/15/30 (f)		110,000		116,325
Vistra Corp. 5 year CMT + 5.740%
7.000% VRN (f) (m)		80,000		81,031
Vistra Operations Co. LLC
5.000% 7/31/27 (f)		18,000		18,681
5.625% 2/15/27 (f)		295,000		303,850
Weekley Homes LLC / Weekley Finance Corp.
4.875% 9/15/28 (f)		81,000		83,430
The William Carter Co.
5.625% 3/15/27 (f)		7,000		7,236
Wyndham Hotels & Resorts, Inc.
4.375% 8/15/28 (f)		23,000		23,690
Xerox Holdings Corp.
5.000% 8/15/25 (f)		57,000		60,420
XHR LP
4.875% 6/01/29 (f)		27,000		27,473
6.375% 8/15/25 (f)		213,000		225,296
				22,426,150
TOTAL CORPORATE DEBT (Cost $37,611,512)				35,597,522
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 3.2%
United States — 3.2%
1211 Avenue of the Americas Trust, Series 2015-1211, Class D,
4.142% VRN 8/10/35 (f) (n)		115,000		117,411

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
AccessLex Institute, Series 2007-A, Class A3, 3 mo. USD LIBOR + .300%
0.480% FRN 5/25/36	$	68,280	$	67,085
Alen 2021-ACEN Mortgage Trust, Series 2021-ACEN, Class D, 1 mo. USD LIBOR + 3.100%
3.210% FRN 4/15/34 (f)		138,000		137,570
BANK
Series 2017-BNK9, Class A4, 3.538% 11/15/54		57,084		62,019
Series 2017-BNK8, Class B, 3.925% VRN 11/15/50 (n)		41,354		44,193
Barclays Commercial Mortgage Trust, Series 2018-TALL, Class C, 1 mo. USD LIBOR + 1.121%
1.231% FRN 3/15/37 (f)		128,000		122,889
Bayview Commercial Asset Trust
Series 2006-3A, Class M1, 1 mo. USD LIBOR + .340% 0.442% FRN 10/25/36 (f)		12,959		12,219
Series 2005-3A, Class M6, 1 mo. USD LIBOR + 1.050% 1.152% FRN 11/25/35 (f)		10,566		9,944
Beast Mortgage Trust
Series 2021-SSCP, Class B, 1 mo. USD LIBOR + 1.100% 1.210% FRN 4/15/36 (f)		127,000		126,008
Series 2021-SSCP, Class C, 1 mo. USD LIBOR + 1.350% 1.460% FRN 4/15/36 (f)		162,000		160,735
Series 2021-SSCP, Class D, 1 mo. USD LIBOR + 1.600% 1.710% FRN 4/15/36 (f)		148,000		146,613
Series 2021-SSCP, Class E, 1 mo. USD LIBOR + 2.100% 2.210% FRN 4/15/36 (f)		127,000		125,731
Series 2021-SSCP, Class F, 1 mo. USD LIBOR + 2.900% 3.010% FRN 4/15/36 (f)		120,000		119,189
Series 2021-SSCP, Class G, 1 mo. USD LIBOR + 3.800% 3.910% FRN 4/15/36 (f)		134,000		133,633
Series 2021-SSCP, Class H, 1 mo. USD LIBOR + 4.902% 5.012% FRN 4/15/36 (f)		99,000		99,000
Benchmark Mortgage Trust
Series 2021-B25, Class XA, 1.110% VRN 4/15/54 (n)		768,231		63,244
Series 2021-B23, Class XA, 1.277% VRN 2/15/54 (n)		1,584,793		142,844
Series 2021-B25, Class A5, 2.577% 4/15/54		134,384		138,668
BHG Securitization Trust, Series 2021-A, Class A,
1.420% 11/17/33 (f)		103,893		102,740
BHMS Mortgage Trust, Series 2018-ATLS, Class A, 1 mo. USD LIBOR + 1.250%
1.360% FRN 7/15/35 (f)		152,559		152,464
Brex Commercial Charge Card Master Trust, Series 2021-1, Class A,
2.090% 7/15/24 (f)		140,000		140,831
BWAY Mortgage Trust, Series 2013-1515, Class D,
3.633% 3/10/33 (f)		100,000		102,163
BX Commercial Mortgage Trust
Series 2020-BXLP, Class D, 1 mo. USD LIBOR + 1.250% 1.360% FRN 12/15/36 (f)		83,504		83,191
Series 2018-BIOA, Class E, 1 mo. USD LIBOR + 1.951% 2.061% FRN 3/15/37 (f)		248,174		247,013
Series 2018-IND, Class G, 1 mo. USD LIBOR + 2.050% 2.160% FRN 11/15/35 (f)		70,000		69,828
Series 2021-21M, Class E, 1 mo. USD LIBOR + 2.171% 2.281% FRN 10/15/36 (f)		390,000		385,125
Series 2021-XL2, Class F, 1 mo. USD LIBOR + 2.244% 2.354% FRN 10/15/38 (f)		435,000		435,000
Series 2021-ARIA, Class E, 1 mo. USD LIBOR + 2.245% 2.355% FRN 10/15/36 (f)		244,134		242,763
1 mo. USD LIBOR + 2.250% 2.360% FRN 1/15/34 (f)		80,000		78,784

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2019-XL, Class G, 1 mo. USD LIBOR + 2.300% 2.410% FRN 10/15/36 (f)	$	233,750	$	231,861
Series 2018-BIOA, Class F, 1 mo. USD LIBOR + 2.471% 2.581% FRN 3/15/37 (f)		200,354		198,479
Series 2020-BXLP, Class G, 1 mo. USD LIBOR + 2.500% 2.610% FRN 12/15/36 (f)		83,504		82,252
Series 2019-XL, Class J, 1 mo. USD LIBOR + 2.650% 2.760% FRN 10/15/36 (f)		365,815		361,945
Series 2021-SOAR, Class G, 1 mo. USD LIBOR + 2.800% 2.910% FRN 6/15/38 (f)		440,000		435,884
Series 2021-VINO, Class F, 1 mo. USD LIBOR + 2.802% 2.912% FRN 5/15/38 (f)		333,000		332,253
Series 2021-CIP, Class E, 1 mo. USD LIBOR + 2.820% 2.920% FRN 12/15/28 (f)		346,750		346,642
1 mo. USD LIBOR + 3.000% 3.110% FRN 1/15/34 (f)		130,000		129,681
Series 2020-VKNG, Class G, 1 mo. USD LIBOR + 3.250% 3.360% FRN 10/15/37 (f)		82,243		81,991
Series 2019-OC11, Class D, 4.076% VRN 12/09/41 (f) (n)		204,000		209,417
Series 2019-OC11, Class E, 4.076% VRN 12/09/41 (f) (n)		286,000		284,876
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class E, 1 mo. USD LIBOR + 2.150%
2.260% FRN 12/15/37 (f)		100,000		99,879
CD Commercial Mortgage Trust, Series 2017-CD6, Class B,
3.911% VRN 11/13/50 (n)		22,907		23,847
Citigroup Commercial Mortgage Trust
Series 2018-C6, Class A4, 4.412% 11/10/51		53,900		61,695
Series 2014-GC19, Class D, 5.091% VRN 3/10/47 (f) (n)		31,563		32,848
COMM Mortgage Trust
Series 2014-CR21, Class A3, 3.528% 12/10/47		109,637		113,168
Series 2014-CR17, Class C, 4.784% VRN 5/10/47 (n)		52,161		53,967
CORE Mortgage Trust, Series 2019-CORE, Class F, 1 mo. USD LIBOR + 2.350%
2.460% FRN 12/15/31 (f)		42,400		41,638
Credit Suisse Mortgage Capital Certificates
Series 2019-ICE4, Class D, 1 mo. USD LIBOR + 1.600% 1.710% FRN 5/15/36 (f)		200,000		199,251
Series 2020-NET, Class A, 2.257% 8/15/37 (f)		108,000		108,858
Series 2019-ICE4, Class E, 1 mo. USD LIBOR + 2.150% 2.260% FRN 5/15/36 (f)		200,000		199,001
Series 2019-ICE4, Class F, 1 mo. USD LIBOR + 2.650% 2.760% FRN 5/15/36 (f)		229,000		227,292
CSAIL Commercial Mortgage Trust
Series 2020-C19, Class A3, 2.561% 3/15/53		309,965		316,216
Series 2016-C5, Class C, 4.646% VRN 11/15/48 (n)		33,371		34,752
CSMC 2020-FACT, Series 2020-FACT, Class E, 1 mo. USD LIBOR + 4.862%
4.972% FRN 10/15/37 (f)		101,000		102,623
DBGS Mortgage Trust
Series 2018-BIOD, Class D, 1 mo. USD LIBOR + 1.300% 1.402% FRN 5/15/35 (f)		92,814		92,583
Series 2018-BIOD, Class F, 1 mo. USD LIBOR + 2.000% 2.102% FRN 5/15/35 (f)		204,191		202,279
DBWF Mortgage Trust, Series 2018-GLKS, Class B, 1 mo. USD LIBOR + 1.350%
1.454% FRN 12/19/30 (f)		100,000		99,633
ELP Commercial Mortgage Trust 2021-ELP, Series 2021-ELP, Class F, 1 mo. USD LIBOR + 2.667%
2.777% FRN 11/15/38 (f)		175,000		173,907

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
Extended Stay America Trust
Series 2021-ESH, Class D, 1 mo. USD LIBOR + 2.250% 2.360% FRN 7/15/38 (f)	$	397,930	$	397,930
Series 2021-ESH, Class E, 1 mo. USD LIBOR + 2.850% 2.960% FRN 7/15/38 (f)		258,654		258,654
GoodLeap Sustainable Home Solutions Trust, Series 2021-3CS, Class A,
2.100% 5/20/48 (f)		389,625		383,823
GS Mortgage Securities Trust
Series 2020-GC47, Class AS, 2.731% 5/12/53		118,084		120,417
Series 2021-DM, Class E, 1 mo. USD LIBOR + 2.935% 3.035% FRN 11/15/36 (f)		675,000		673,038
JP Morgan Chase Commercial Mortgage Securities Trust
Series 2021-MHC, Class E, 1 mo. USD LIBOR + 2.450% 2.560% FRN 4/15/38 (f)		200,000		199,626
Series 2021-MHC, Class F, 1 mo. USD LIBOR + 2.950% 3.060% FRN 4/15/38 (f)		210,000		209,739
Series 2019-MFP, Class F, 1 mo. USD LIBOR + 3.000% 3.110% FRN 7/15/36 (f)		102,000		99,902
Series 2019-COR4, Class A5, 4.029% 3/10/52		114,000		127,833
Series 2018-WPT, Class DFX, 5.350% 7/05/33 (f)		58,198		59,878
Lendmark Funding Trust
Series 2021-1A, Class A, 1.900% 11/20/31 (f)		300,000		295,760
Series 2021-1A, Class B, 2.470% 11/20/31 (f)		100,000		99,279
Series 2021-1A, Class C, 3.410% 11/20/31 (f)		100,000		101,931
Life Mortgage Trust, Series 2021-BMR, Class F, 1 mo. USD LIBOR + 2.350%
2.460% FRN 3/15/38 (f)		405,000		403,636
Loanpal Solar Loan, Series 2020-2GF, Class A,
2.750% 7/20/47 (f)		110,472		112,413
LUXE Trust 2021-TRIP, Series 2021-TRIP, Class E, 1 mo. USD LIBOR + 2.750%
2.860% FRN 10/15/38 (f)		128,845		128,603
Mariner Finance Issuance Trust, Series 2020-AA, Class A,
2.190% 8/21/34 (f)		150,000		151,703
Med Trust 2021-MDLN
Series 2021-MDLN, Class F, 1 mo. USD LIBOR + 4.000% 4.110% FRN 11/15/38 (f)		434,944		430,600
Series 2021-MDLN, Class G, 1 mo. USD LIBOR + 5.250% 5.360% FRN 11/15/38 (f)		468,000		463,296
Mercury Financial Credit Card Master Trust, Series 2021-1A, Class A,
1.540% 3/20/26 (f)		550,000		550,253
MF1 2021-W10X, Series 2021-W10, Class F, SOFR30A + 3.370%
3.423% FRN 12/15/34 (f)		226,799		226,612
MHC Commercial Mortgage Trust
Series 2021-MHC, Class E, 1 mo. USD LIBOR + 2.101% 2.211% FRN 4/15/38 (f)		420,000		419,343
Series 2021-MHC, Class F, 1 mo. USD LIBOR + 2.601% 2.711% FRN 4/15/38 (f)		368,917		368,340
MHP 2021-STOR, Series 2021-STOR, Class G, 1 mo. USD LIBOR + 2.750%
2.860% FRN 7/15/38 (f)		105,000		104,031
Morgan Stanley Bank of America Merrill Lynch Trust
Series 2016-C32, Class A4, 3.720% 12/15/49		89,000		96,208
Series 2015-C24, Class C, 4.343% VRN 5/15/48 (n)		17,233		17,735
Morgan Stanley Capital I Trust
Series 2020-L4, Class A3, 2.698% 2/15/53		76,000		78,637
Series 2018-MP, Class A, 4.276% VRN 7/11/40 (f) (n)		56,000		61,315
Mosaic Solar Loans LLC
Series 2021-2A, Class B, 2.090% 4/22/47 (f)		104,414		102,077

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2017-2A, Class A, 3.820% 6/22/43 (f)	$	50,455	$	52,479
Navient Private Education Refi Loan Trust
Series 2021-DA, Class A, PRIME - 1.990% 1.260% FRN 4/15/60 (f)		441,848		440,604
Series 2021-DA, Class B, 2.610% 4/15/60 (f)		100,000		100,352
Series 2021-DA, Class C, 3.480% 4/15/60 (f)		190,000		192,277
Series 2021-DA, Class D, 4.000% 4/15/60 (f)		100,000		99,278
Nelnet Student Loan Trust
Series 2021-BA, Class B, 2.680% 4/20/62 (f)		600,000		598,200
Series 2021-A, Class B2, 2.850% 4/20/62 (f)		597,000		599,190
Series 2021-BA, Class C, 3.570% 4/20/62 (f)		170,000		169,817
Series 2021-A, Class C, 3.750% 4/20/62 (f)		378,250		381,061
Series 2021-CA, Class D, 4.440% 4/20/62 (f)		100,000		101,062
Series 2021-BA, Class D, 4.750% 4/20/62 (f)		100,000		99,611
Series 2021-A, Class D, 4.930% 4/20/62 (f)		160,000		161,810
Pagaya AI Debt Selection Trust,, Series 2021-2, Class NOTE,
3.000% 1/25/29 (f)		362,227		360,292
PKHL Commercial Mortgage Trust 2021-MF, Series 2021-MF, Class F, 1 mo. USD LIBOR + 3.350%
3.460% FRN 7/15/38 (f)		100,000		99,709
Progress Residential, Series 2021-SFR3, Class F,
3.436% 5/17/26 (f)		100,000		99,176
SLM Private Credit Student Loan Trust, Series 2010-C, Class A5, 1 mo. USD LIBOR + 4.750%
4.860% FRN 10/15/41 (f)		422,000		466,830
SMB Private Education Loan Trust
Series 2021-A, Class B, 2.310% 1/15/53 (f)		150,000		148,657
Series 2020-BA, Class B, 2.760% 7/15/53 (f)		100,000		100,803
Series 2021-A, Class C, 2.990% 1/15/53 (f)		380,000		378,284
Series 2021-A, Class D1, 3.860% 1/15/53 (f)		200,000		199,497
Series 2021-A, Class D2, 3.860% 1/15/53 (f)		110,000		109,723
SREIT Trust
Series 2021-FLWR, Class E, 1 mo. USD LIBOR + 1.924% 2.034% FRN 7/15/36 (f)		87,000		85,455
Series 2021-MFP2, Class F, 1 mo. USD LIBOR + 2.618% 2.718% FRN 11/15/36 (f)		100,000		99,500
Series 2021-MFP, Class F, 1 mo. USD LIBOR + 2.625% 2.725% FRN 11/15/38 (f)		260,000		258,540
UBS Commercial Mortgage Trust, Series 2019-C17, Class A4,
2.921% 10/15/52		31,331		32,872
UBS-Barclays Commercial Mortgage Trust, Series 2012-C3, Class D,
5.047% VRN 8/10/49 (f) (n)		46,431		46,741
VNO Mortgage Trust
3.903% VRN 1/10/35 (f) (n)		100,000		101,567
Wells Fargo Commercial Mortgage Trust
Series 2021-C59, Class XA, 1.551% VRN 4/15/54 (n)		999,287		111,353
Series 2020-C58, Class XA, 1.880% VRN 7/15/53 (n)		993,172		129,307
Series 2018-1745, Class A, 3.749% VRN 6/15/36 (f) (n)		100,000		108,422
Series 2015-C28, Class AS, 3.872% VRN 5/15/48 (n)		90,000		94,377
Series 2017-C38, Class C, 3.903% VRN 7/15/50 (n)		34,422		35,795
Series 2017-C41, Class B, 4.188% VRN 11/15/50 (n)		82,814		86,835
				21,639,703
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $21,676,163)				21,639,703

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
SOVEREIGN DEBT OBLIGATIONS — 2.5%
Argentina — 0.2%
Argentine Republic Government International Bond
0.500% STEP 7/09/30	$	957,844	$	335,255
1.000% 7/09/29		100,849		36,559
1.125% STEP 7/09/35		1,206,206		385,998
2.000% STEP 1/09/38		389,621		147,082
2.500% STEP 7/09/41		142,000		50,055
				954,949
Austria — 0.1%
Republic of Austria Government International Bond
2.100% EUR (f) (g)		419,000		735,077
Bahrain — 0.0%
Bahrain Government International Bond
6.750% 9/20/29 (f)		200,000		215,185
Brazil — 0.3%
Brazil Letras do Tesouro Nacional
7/01/24BRL (g)		15,649,000		2,173,309
Canada — 0.5%
Canadian Government Bond
0.500% 9/01/25 CAD (g)		4,498,000		3,471,103
China — 0.3%
China Government International Bond
2.680% 5/21/30 CNY (g)		11,830,000		1,828,591
Colombia — 0.0%
Colombia Government International Bond
4.125% 5/15/51 (a)		200,000		162,300
Dominican Republic — 0.1%
Dominican Republic International Bond
4.500% 1/30/30 (f)		150,000		152,437
4.875% 9/23/32 (f)		150,000		152,438
				304,875
Egypt — 0.1%
Egypt Government International Bond
5.875% 6/11/25 (f)		317,000		325,577
Japan — 0.4%
Japan Government Thirty Year Bond
0.700% 9/20/51 JPY (g)		289,700,000		2,522,881
Mexico — 0.1%
Mexico Government International Bond
3.750% 1/11/28		266,000		285,820
Morocco — 0.0%
Morocco Government International Bond
3.000% 12/15/32 (f)		200,000		190,608

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
Panama — 0.0%
Panama Government International Bond
4.500% 4/16/50	$	200,000	$	220,302
Russia — 0.0%
Russian Foreign Bond - Eurobond
5.250% 6/23/47 (f)		200,000		253,008
Saudi Arabia — 0.0%
Saudi Government International Bond
2.250% 2/02/33 (f)		202,000		196,901
Spain — 0.4%
Spain Government International Bond
3.450% 7/30/66 EUR (f) (g)		1,697,000		2,907,865
Ukraine — 0.0%
Ukraine Government International Bond
7.253% 3/15/33 (f)		200,000		176,000
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $18,180,284)				16,924,351
U.S. Government Agency Obligations and Instrumentalities(o) — 0.1%
	Number of Shares
United States — 0.1%
Federal Home Loan Mortgage Corp. Multifamily Structured Pass Through Certificates
0.802% VRN 5/25/29 (n)		1,554,474		75,081
Series K120, Class X1, 1.039% VRN 10/25/30 (n)		1,361,199		105,115
Series KL06, Class XFX, 1.364% 12/25/29		220,639		19,061
Series K116, Class X1, 1.426% VRN 7/25/30 (n)		207,415		21,336
Series K105, Class X1, 1.523% VRN 3/25/53 (n)		959,371		102,042
Series K109, Class X1, 1.582% VRN 4/25/30 (n)		309,704		34,669
Series K110, Class X1, 1.697% VRN 4/25/30 (n)		357,400		42,803
Federal National Mortgage Association ACES, Series 2018-M13, Class A2,
3.710% VRN 9/25/30 (n)		58,000		66,651
				466,758
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $516,678)				466,758
	Principal Amount
U.S. TREASURY OBLIGATIONS — 1.6%
United States — 1.6%
U.S. Treasury Bond
1.750% 8/15/41	$	1,333,200		1,289,898
1.875% 11/15/51		903,300		896,808
2.000% 8/15/51 (h)		1,896,800		1,929,214
U.S. Treasury Note
0.125% 11/30/22 (i)		5,000,000		4,988,562

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Principal Amount		Value
1.375% 11/15/31 (h)	$	1,848,300	$	1,825,196
				10,929,678
TOTAL U.S. TREASURY OBLIGATIONS (Cost $10,850,416)				10,929,678
TOTAL BONDS & NOTES (Cost $110,242,467)				106,891,729
	Number of Shares
MUTUAL FUNDS — 3.9%
Diversified Financial Services — 3.9%
United States — 3.9%
Consumer Discretionary Select Sector SPDR Fund (a)		3,257		665,861
Financial Select Sector SPDR Fund		20,568		803,180
Health Care Select Sector SPDR Fund (a)		5,533		779,544
Industrial Select Sector SPDR Fund (a)		12,313		1,302,838
Invesco Senior Loan ETF (a)		47,956		1,059,828
iShares Biotechnology ETF		529		80,736
iShares China Large-Cap ETF (a)		12,680		463,834
iShares iBoxx $ Investment Grade Corporate Bond ETF (a)		1,408		186,588
iShares Latin America 40 ETF (a)		10,184		238,917
iShares MSCI Brazil ETF (a)		11,766		330,272
iShares MSCI Emerging Markets ETF		1,380		67,413
iShares S&P 500 Value ETF		5,829		912,996
KraneShares Bosera MSCI China A ETF		4,278		185,751
KraneShares CSI China Internet ETF (a)		14,791		539,724
SPDR Blackstone Senior Loan ETF		8,205		374,394
SPDR Bloomberg High Yield Bond ETF		1,645		178,598
SPDR Gold Shares (i)		8,005		1,368,535
SPDR S&P 500 Trust ETF		22,800		10,602,000
State Street Navigator Securities Lending Government Money Market Portfolio (p)		6,077,810		6,077,810
VanEck Semiconductor ETF (a)		793		244,870
				26,463,689
TOTAL MUTUAL FUNDS (Cost $26,079,246)				26,463,689
TOTAL PURCHASED OPTIONS (#) — 0.3% (Cost $3,175,508)				2,261,074
WARRANTS — 0.0%
Cayman Islands — 0.0%
Austerlitz Acquisition Corp. I Expires 02/19/26, Strike 11.50 (e)		5,545		5,823
Hedosophia European Growth Expires 05/13/27, Strike 11.50 (d) (e)		6,879		5,482
TPG Pace Beneficial Finance Corp. Expires 10/09/27, Strike 11.50 (e)		1,740		1,444
				12,749
Switzerland — 0.0%
Cie Financiere Richemont SA Expires 11/22/23, Strike 67.00 (e)		124		136

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

	Number of Shares		Value
United Kingdom — 0.0%
Genius Sports Ltd. Expires 12/31/28, Strike 11.50 (e)		4,165	$	9,121
United States — 0.0%
Altus Power, Inc. Expires 01/22/26, Strike 11.00 (e)		1,832		4,708
Cano Health, Inc. Expires 3/03/26, Strike 11.50 (e)		7,127		17,034
EVGO, Inc. Expires 09/15/25, Strike 11.50 (e)		3,880		10,282
Gores Holdings VIII, Inc. Expires 12/31/27, Strike 11.50 (e)		289		587
Hippo Holdings, Inc. Expires 08/02/26, Strike 11.50 (e)		3,279		1,566
Innovid Corp. Expires 12/31/27, Strike 11.50 (e)		1,313		1,339
Latch, Inc. Expires 6/04/26, Strike 11.50 (e)		8,977		16,473
Offerpad Solutions, Inc. Expires 10/13/25, Strike 11.50 (e)		5,981		6,400
Sarcos Technology and Robotics Corp. Expires 06/15/27, Strike 11.50 (e)		20,716		42,053
Volta, Inc. Expires 08/26/26, Strike 11.50 (e)		4,000		7,440
				107,882
TOTAL WARRANTS (Cost $165,326)				129,888
TOTAL LONG-TERM INVESTMENTS (Cost $498,511,884)				597,969,307
	Principal Amount
SHORT-TERM INVESTMENTS — 13.5%
Repurchase Agreement — 13.5%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (q)	$	92,560,505		92,560,505
TOTAL SHORT-TERM INVESTMENTS (Cost $92,560,505)				92,560,505
TOTAL INVESTMENTS — 100.9% (Cost $591,072,389) (r)				690,529,812
Less Unfunded Loan Commitments — 0.0%				(8,393)
NET INVESTMENTS — 100.9% (Cost $591,063,996)				690,521,419
Other Assets/(Liabilities) — (0.9)%				(6,251,045)
NET ASSETS — 100.0%			$	684,270,374

	Number of Shares
Equities Sold Short — (0.1)%
United States — (0.1)%
The J.M. Smucker Co.		(1,376	)	(186,888	)
Walgreens Boots Alliance, Inc.		(12,466	)	(650,226	)
				(837,114	)
TOTAL EQUITIES SOLD SHORT (Cost $(690,788))				(837,114	)

Abbreviation Legend

ADR American Depositary Receipt

DIP Debtor In Possession

ETF Exchange-Traded Fund

FRN Floating Rate Note

STEP Step Up Bond

VRN Variable Rate Note

Notes to Consolidated 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 December 31, 2021, was $11,022,909 or 1.61% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $5,240,666 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) Investment was valued using significant unobservable inputs.

(c) Restricted security. Certain securities are restricted as to resale. At December 31, 2021, these securities amounted to a value of $4,996,231 or 0.73% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

(d) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At December 31, 2021, these securities amounted to a value of $5,006,879 or 0.73% of net assets.

(e) Non-income producing security.

(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 December 31, 2021, the aggregate market value of these securities amounted to $62,125,239 or 9.08% of net assets.

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

(h) A portion of this security is pledged/held as collateral for open derivatives.

(i) All or a portion of this security is held by a wholly owned subsidiary. See Note 1 of the Notes to Consolidated Portfolio Statements for details on the wholly owned subsidiary.

(j) All or a portion of the security represents unsettled loan commitments at December 31, 2021 where the rate will be determined at time of settlement.

(k) Unfunded or partially unfunded loan commitments.

(l) 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 December 31, 2021, these securities amounted to a value of $115,486 or 0.02% of net assets.

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

(n) 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 December 31, 2021.

(o) 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.

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

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

Notes to Consolidated Portfolio of Investments (Continued)

(q) Maturity value of $92,560,505. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $94,411,747.

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

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

(#) OTC Options Purchased
Description	Counterparty	Expiration Date		Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
LVMH Moet Hennessy Louis Vuitton SE	Barclays Bank PLC		3/18/22		730.00		453	EUR	330,690	$	15,338	$	14,148	$	1,190
USD Call CNH Put	Citibank N.A.		3/29/22		6.45		3,421,000	USD	3,421,000		17,577		19,610		(2,033)
USD Call CNH Put	Citibank N.A.		3/29/22		6.75		3,421,000	USD	3,421,000		2,538		3,053		(515)
Royal Dutch Shell PLC	Citibank N.A.		4/14/22		50.00		21,692	USD	1,084,600		12,219		62,876		(50,657)
Amazon.com, Inc.	Citibank N.A.		6/17/22		4,150.00		267	USD	1,108,050		12,448		36,846		(24,398)
Euro Stoxx 50 Index	Credit Suisse International		3/18/22		4,600.00		225	EUR	1,035,000		3,610		10,146		(6,536)
Euro Stoxx 50 Index	Credit Suisse International		6/17/22		4,650.00		225	EUR	1,046,250		8,500		14,249		(5,749)
Vodafone Group PLC	Goldman Sachs International		1/21/22		1.20		217,849	GBP	261,419		1,514		10,959		(9,445)
EssilorLuxottica SA	Goldman Sachs International		6/17/22		200.00		3,370	EUR	674,000		21,202		23,903		(2,701)
EssilorLuxottica SA	JP Morgan Chase Bank N.A.		9/16/22		200.00		2,010	EUR	402,000		18,535		22,073		(3,538)
Pioneer Natural Resources Co.	Morgan Stanley & Co. LLC		1/21/22		205.00		5,976	USD	1,225,080		3,960		48,827		(44,867)
Pioneer Natural Resources Co.	Morgan Stanley & Co. LLC		4/14/22		210.00		10,911	USD	2,291,310		52,681		113,488		(60,807)
Royal Dutch Shell PLC	Nomura International PLC		1/21/22		45.00		12,305	USD	553,725		5,387		14,274		(8,887)
Eli Lilly & Co.	Wells Fargo Securities LLC		1/21/22		275.00		27	USD	742,500		20,299		27,060		(6,761)
										$	195,808	$	421,512	$	(225,704)
Put
EUR Put USD Call	BNP Paribas SA		3/17/22		1.13		4,531,000	EUR	4,531,000	$	25,225	$	50,486	$	(25,261)
EUR Put USD Call	Deutsche Bank AG		1/06/22		1.13		19,370,073	EUR	19,370,073		2,955		130,855		(127,900)
										$	28,180	$	181,341	$	(153,161)
										$	223,988	$	602,853	$	(378,865)

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

(#) Exchange-Traded Options Purchased
Description	Expiration Date	Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
SPDR S&P 500 Trust	1/07/22		472.00		221	USD	10,431,200	$	107,627	$	57,201	$	50,426
SPDR S&P 500 Trust	1/14/22		475.00		228	USD	10,830,000		105,108		110,336		(5,228)
Alcoa Corp.	1/21/22		50.00		64	USD	320,000		66,688		21,900		44,788
Alcoa Corp.	1/21/22		55.00		121	USD	665,500		73,810		44,914		28,896
Alibaba Group Holding Ltd.	1/21/22		190.00		40	USD	760,000		280		36,489		(36,209)
Amazon.com, Inc.	1/21/22		3,900.00		2	USD	780,000		376		11,842		(11,466)
Atlassian Corp. PLC	1/21/22		470.00		8	USD	376,000		519		13,218		(12,699)
Autodesk, Inc.	1/21/22		310.00		21	USD	651,000		1,323		16,952		(15,629)
BP PLC	1/21/22		27.00		109	USD	294,300		5,232		9,956		(4,724)
BP PLC	1/21/22		31.00		178	USD	551,800		534		19,732		(19,198)
BP PLC	1/21/22		32.00		126	USD	403,200		126		8,668		(8,542)
Caesars Entertainment, Inc.	1/21/22		100.00		21	USD	210,000		3,654		33,306		(29,652)
CF Industries Holdings, Inc.	1/21/22		65.00		38	USD	247,000		24,700		10,101		14,599
Comcast Corp.	1/21/22		55.00		71	USD	390,500		355		12,742		(12,387)
Comcast Corp.	1/21/22		57.50		45	USD	258,750		90		4,461		(4,371)
D.R. Horton, Inc.	1/21/22		105.00		48	USD	504,000		19,824		12,867		6,957
Deere & Co.	1/21/22		380.00		8	USD	304,000		240		9,843		(9,603)
Devon Energy Corp.	1/21/22		40.00		273	USD	1,092,000		126,945		104,131		22,814
Devon Energy Corp.	1/21/22		44.00		28	USD	123,200		5,348		5,326		22
Devon Energy Corp.	1/21/22		46.00		78	USD	358,800		8,502		14,992		(6,490)
DiamondBack Energy, Inc.	1/21/22		115.00		32	USD	368,000		6,656		31,431		(24,775)
Dick's Sporting Goods, Inc.	1/21/22		140.00		61	USD	854,000		3,050		37,477		(34,427)
Energy Transfer LP	1/21/22		10.00		224	USD	224,000		224		11,837		(11,613)
Exxon Mobil Corp.	1/21/22		62.50		43	USD	268,750		3,526		9,573		(6,047)
FedEx Corp.	1/21/22		280.00		13	USD	364,000		624		11,673		(11,049)
Ford Motor Co.	1/21/22		22.00		258	USD	567,600		9,030		31,533		(22,503)
Freeport-McMoRan, Inc.	1/21/22		41.00		187	USD	766,700		34,782		61,190		(26,408)
Generac Holdings, Inc.	1/21/22		440.00		3	USD	132,000		75		4,644		(4,569)
General Motors Co.	1/21/22		65.00		64	USD	416,000		1,856		16,702		(14,846)
Global Payments, Inc.	1/21/22		170.00		44	USD	748,000		486		25,178		(24,692)
Hilton Worldwide Holdings, Inc.	1/21/22		140.00		21	USD	294,000		35,280		12,862		22,418
iShares MSCI Emerging Markets ETF	1/21/22		54.00		385	USD	2,079,000		385		30,886		(30,501)
Lions Gate Entertainment Corp.	1/21/22		19.00		12	USD	22,800		256		639		(383)
MongoDB, Inc.	1/21/22		610.00		6	USD	366,000		2,154		20,713		(18,559)
O'Reilly Automotive, Inc.	1/21/22		660.00		5	USD	330,000		25,720		5,161		20,559
Ovintiv, Inc.	1/21/22		38.00		80	USD	304,000		3,600		26,578		(22,978)
Sabre Corp.	1/21/22		12.00		14	USD	16,800		14		486		(472)
salesforce.com, Inc.	1/21/22		290.00		15	USD	435,000		360		6,761		(6,401)
SPDR S&P 500 Trust	1/21/22		468.00		231	USD	10,810,800		248,325		128,958		119,367
SPDR S&P 500 Trust	1/21/22		470.00		277	USD	13,019,000		254,840		173,464		81,376
SPDR S&P Biotech ETF	1/21/22		134.00		76	USD	1,018,400		304		24,375		(24,071)
SPDR S&P Biotech ETF	1/21/22		135.00		90	USD	1,215,000		900		28,257		(27,357)
Tesla, Inc.	1/21/22		1,200.00		8	USD	960,000		13,520		30,172		(16,652)
Uber Technologies, Inc.	1/21/22		50.00		260	USD	1,300,000		4,420		49,836		(45,416)

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

Description	Expiration Date	Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
Zscaler, Inc.	1/21/22		370.00		10	USD	370,000		980		17,972		(16,992)
Alphabet, Inc.	2/18/22		3,200.00		3	USD	960,000		5,880		27,179		(21,299)
ARK Innovation ETF	2/18/22		97.00		85	USD	824,500		37,825		43,454		(5,629)
Ford Motor Co.	2/18/22		22.00		306	USD	673,200		27,540		37,400		(9,860)
Generac Holdings, Inc.	2/18/22		390.00		3	USD	117,000		2,760		5,201		(2,441)
iShares China Large-Cap ETF	2/18/22		39.00		370	USD	1,443,000		17,020		38,160		(21,140)
iShares China Large-Cap ETF	2/18/22		44.00		651	USD	2,864,400		3,255		60,661		(57,406)
Micron Technology, Inc.	2/18/22		90.00		41	USD	369,000		27,306		24,937		2,369
Microsoft Corp.	2/18/22		340.00		45	USD	1,530,000		45,630		56,550		(10,920)
Microsoft Corp.	2/18/22		350.00		23	USD	805,000		14,030		26,386		(12,356)
Xerox Holdings Corp.	2/18/22		25.00		18	USD	45,000		810		807		3
Dexcom, Inc.	3/18/22		600.00		7	USD	420,000		14,840		17,376		(2,536)
BP PLC	4/14/22		32.00		354	USD	1,132,800		7,434		49,238		(41,804)
Twilio, Inc.	4/14/22		310.00		18	USD	558,000		19,926		47,857		(27,931)
Western Digital Corp.	4/14/22		80.00		34	USD	272,000		5,916		3,847		2,069
Xerox Holdings Corp.	4/14/22		30.00		19	USD	57,000		190		308		(118)
General Motors Co.	6/17/22		65.00		123	USD	799,500		45,018		37,242		7,776
Xerox Holdings Corp.	7/15/22		30.00		10	USD	30,000		370		482		(112)
								$	1,478,398	$	1,834,420	$	(356,022)
Put
Cboe Volatility Index	1/19/22		22.00		250	USD	550,000	$	92,500	$	64,305	$	28,195
Invesco QQQ Trust Series	1/21/22		360.00		4	USD	144,000		268		1,578		(1,310)
iShares iBoxx $ High Yield Corporate Bond ETF	1/21/22		82.00		374	USD	3,066,800		2,244		22,897		(20,653)
iShares iBoxx $ High Yield Corporate Bond ETF	1/21/22		84.00		748	USD	6,283,200		6,732		39,062		(32,330)
iShares iBoxx $ High Yield Corporate Bond ETF	1/21/22		85.00		16	USD	136,000		160		964		(804)
iShares Russell 2000 ETF	1/21/22		195.00		10	USD	195,000		270		1,740		(1,470)
salesforce.com, Inc.	1/21/22		280.00		15	USD	420,000		36,570		18,293		18,277
Invesco QQQ Trust Series	2/18/22		325.00		12	USD	390,000		1,236		3,737		(2,501)
Invesco QQQ Trust Series	2/18/22		350.00		9	USD	315,000		2,052		2,052		—
iShares iBoxx $ High Yield Corporate Bond ETF	2/18/22		84.00		11	USD	92,400		297		860		(563)
iShares Russell 2000 ETF	2/18/22		190.00		7	USD	133,000		679		2,125		(1,446)
iShares Russell 2000 ETF	2/18/22		205.00		20	USD	410,000		4,700		4,711		(11)
U.S. Treasury Note 10 Year Future	2/18/22		129.00		2	USD	260,938		813		1,004		(191)
U.S. Treasury Note 10 Year Future	2/18/22		129.50		137	USD	17,874,219		74,922		83,902		(8,980)
American Airlines Group, Inc.	3/18/22		10.00		23	USD	23,000		138		812		(674)
United Airlines Holdings, Inc.	3/18/22		25.00		11	USD	27,500		66		524		(458)
Invesco Senior Loan ETF	4/14/22		20.00		59	USD	118,000		660		806		(146)
Pitney Bowes, Inc.	4/14/22		6.00		6	USD	3,600		240		406		(166)
								$	224,547	$	249,778	$	(25,231)
								$	1,702,945	$	2,084,198	$	(381,253)

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

(#) 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
Buy Protection on 5-Year Credit Default Swap, 12/20/26	Bank of America N.A.	1/19/22	106.00	5.000%	Semi-Annually	CDX. NA.HY Series 37†	Quarterly	USD	285,000	$	232	$	1,140	$	(908)
Buy Protection on 5-Year Credit Default Swap, 12/20/26	Bank of America N.A.	1/19/22	106.00	5.000%	Semi-Annually	CDX. NA.HY Series 37†	Quarterly	USD	155,000		126		697	(571)
Buy Protection on 5-Year Credit Default Swap, 12/20/26	Goldman Sachs International	1/19/22	106.00	5.000%	Semi-Annually	CDX. NA.HY Series 37†	Quarterly	USD	415,000		339		1,760	(1,421)
Buy Protection on 5-Year Credit Default Swap, 12/20/26	JP Morgan Chase Bank N.A.	1/19/22	70.00	1.000%	Semi-Annually	CDX. NA.IG Series 37†	Quarterly	USD	2,345,000		170		1,689	(1,519)
Buy Protection on 5-Year Credit Default Swap, 12/20/26	JP Morgan Chase Bank N.A.	2/16/22	104.00	5.000%	Semi-Annually	CDX. NA.HY Series 37†	Quarterly	USD	205,000		379		1,189	(810)
Buy Protection on 5-Year Credit Default Swap, 12/20/26	Morgan Stanley & Co. LLC	1/19/22	106.00	5.000%	Semi-Annually	CDX. NA.HY Series 37†	Quarterly	USD	340,000		277		1,360	(1,083)
										$	1,523	$	7,835	$	(6,312)

(#) Interest Rate Swaptions Purchased

Paid by Fund

Received by Fund

Description

Counterparty

Expiration Date

Rate

Frequency

Rate

Frequency

Notional Amount

Value

Premium Paid (Received)

Unrealized Appreciation/ (Depreciation)

Call

30-Year Interest Rate Swap, 7/7/52

Citibank N.A.

7/05/22

3-Month USD LIBOR BBA

Quarterly

1.52%##

Semi-Annually

USD

2,859,698

$

81,094

$

75,682

$

5,412

30-Year Interest Rate Swap, 7/8/52

Deutsche Bank AG

7/06/22

3-Month USD LIBOR BBA

Quarterly

1.55%##

Semi-Annually

USD

604,233

18,614

16,491

2,123

30-Year Interest Rate Swap, 7/8/52

Deutsche Bank AG

7/06/22

3-Month USD LIBOR BBA

Quarterly

1.55%##

Semi-Annually

USD

604,233

18,614

16,276

2,338

30-Year Interest Rate Swap, 4/22/52

Goldman Sachs International

4/20/22

3-Month USD LIBOR BBA

Quarterly

1.60%##

Semi-Annually

USD

1,363,314

35,170

42,103

(6,933)

30-Year Interest Rate Swap, 4/22/52

Goldman Sachs International

4/20/22

3-Month USD LIBOR BBA

Quarterly

1.60%##

Semi-Annually

USD

1,363,000

35,165

42,227

(7,062)

30-Year Interest Rate Swap, 4/20/52

Morgan Stanley & Co. LLC

4/14/22

3-Month USD LIBOR BBA

Quarterly

1.50%##

Semi-Annually

USD

5,344,240

94,579

100,846

(6,267)

10-Year Interest Rate Swap, 4/25/32

Morgan Stanley & Co. LLC

4/21/22

3-Month USD LIBOR BBA

Quarterly

1.30%##

Semi-Annually

USD

2,892,513

15,611

34,498

(18,887)

1-Year Interest Rate Swap, 3/20/24

Morgan Stanley & Co. LLC

3/16/23

3-Month USD LIBOR BBA

Quarterly

0.80%##

Semi-Annually

USD

36,619,299

27,391

116,449

(89,058)

326,238

444,572

(118,334)

Put

30-Year Interest Rate Swap, 1/21/52

Morgan Stanley & Co. LLC

1/19/22

1.96%##

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

USD

2,861,145

$

6,380

$

36,050

$

(29,670)

$

332,618

$

480,622

$

(148,004)

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

OTC Options Written
Description	Counterparty	Expiration Date		Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
LVMH Moet Hennessy Louis Vuitton SE	Barclays Bank PLC		3/18/22		800.00		680	EUR	544,000	$	(6,033)	$	(5,808)	$	(225)
Charter Communications, Inc.	Citibank N.A.		3/18/22		680.00		1,000	USD	680,000		(20,915)		(10,700)		(10,215)
USD Call CNH Put	Citibank N.A.		3/29/22		6.60		6,842,000	USD	6,842,000		(11,590)		(12,961)		1,371
Royal Dutch Shell PLC	Citibank N.A.		4/14/22		60.00		21,692	USD	1,301,520		(2,353)		(14,098)		11,745
Vodafone Group PLC	Goldman Sachs International		1/21/22		1.35		217,849	GBP	294,096		(56)		(2,718)		2,662
EssilorLuxottica SA	Goldman Sachs International		6/17/22		220.00		3,370	EUR	741,400		(7,801)		(7,499)		(302)
EssilorLuxottica SA	JP Morgan Chase Bank N.A.		9/16/22		225.00		2,010	EUR	452,250		(6,701)		(7,658)		957
Pioneer Natural Resources Co.	Morgan Stanley & Co. LLC		1/21/22		225.00		2,988	USD	672,300		(378)		(10,694)		10,316
Pioneer Natural Resources Co.	Morgan Stanley & Co. LLC		4/14/22		240.00		10,911	USD	2,618,640		(16,811)		(40,999)		24,188
Royal Dutch Shell PLC	Nomura International PLC		1/21/22		50.00		12,305	USD	615,250		(623)		(2,461)		1,838
Eli Lilly & Co.	Wells Fargo Securities LLC		1/21/22		295.00		27	USD	796,500		(3,919)		(12,090)		8,171
										$	(77,180)	$	(127,686)	$	50,506
Put
LVMH Moet Hennessy Louis Vuitton SE	Barclays Bank PLC		3/18/22		650.00		453	EUR	294,450		(5,289)		(7,687)		2,398
EUR Put USD Call	BNP Paribas SA		3/17/22		1.10		4,531,000	EUR	4,531,000		(6,128)		(21,712)		15,584
Charter Communications, Inc.	Citibank N.A.		3/18/22		560.00		1,000	USD	560,000		(5,640)		(15,000)		9,360
Royal Dutch Shell PLC	Citibank N.A.		4/14/22		40.00		21,692	USD	867,680		(28,341)		(21,321)		(7,020)
Amazon.com, Inc.	Citibank N.A.		6/17/22		2,800.00		133	USD	372,400		(10,303)		(19,337)		9,034
Euro Stoxx 50 Index	Credit Suisse International		6/17/22		3,400.00		337	EUR	1,145,800		(20,567)		(20,286)		(281)
EUR Put USD Call	Deutsche Bank AG		1/06/22		1.11		14,527,555	EUR	14,527,555		(66)		(44,601)		44,535
EssilorLuxottica SA	Goldman Sachs International		6/17/22		160.00		3,370	EUR	539,200		(17,483)		(16,912)		(571)
EssilorLuxottica SA	JP Morgan Chase Bank N.A.		9/16/22		160.00		2,010	EUR	321,600		(15,279)		(14,865)		(414)
Pioneer Natural Resources Co.	Morgan Stanley & Co. LLC		1/21/22		160.00		3,986	USD	637,760		(2,662)		(18,110)		15,448
Pioneer Natural Resources Co.	Morgan Stanley & Co. LLC		4/14/22		155.00		10,911	USD	1,691,205		(63,011)		(73,364)		10,353
Royal Dutch Shell PLC	Nomura International PLC		1/21/22		40.00		16,595	USD	663,800		(3,049)		(11,673)		8,624
										$	(177,818)	$	(284,868)	$	107,050
										$	(254,998)	$	(412,554)	$	157,556

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

Exchange-Traded Options Written
Description	Expiration Date	Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
SPDR S&P 500 Trust	1/07/22		480.00		148	USD	7,104,000	$	(12,136)	$	(11,197)	$	(939)
Abbott Laboratories	1/21/22		146.00		36	USD	525,600		(2,916)		(3,548)		632
Alcoa Corp.	1/21/22		65.00		73	USD	474,500		(10,950)		(12,467)		1,517
Alibaba Group Holding Ltd.	1/21/22		215.00		40	USD	860,000		(160)		(12,510)		12,350
Amazon.com, Inc.	1/21/22		4,250.00		2	USD	850,000		(102)		(4,086)		3,984
Apple, Inc.	1/21/22		195.00		229	USD	4,465,500		(8,473)		(53,240)		44,767
Atlassian Corp. PLC	1/21/22		520.00		8	USD	416,000		(166)		(4,782)		4,616
Autodesk, Inc.	1/21/22		330.00		21	USD	693,000		(315)		(7,618)		7,303
BP PLC	1/21/22		30.00		109	USD	327,000		(327)		(2,286)		1,959
Caesars Entertainment, Inc.	1/21/22		130.00		21	USD	273,000		(294)		(11,529)		11,235
Capital One Financial Corp.	1/21/22		164.40		59	USD	969,960		(826)		(19,416)		18,590
Costco Wholesale Corp.	1/21/22		585.00		23	USD	1,345,500		(8,050)		(10,465)		2,415
D.R. Horton, Inc.	1/21/22		100.00		39	USD	390,000		(34,515)		(10,404)		(24,111)
Devon Energy Corp.	1/21/22		50.00		273	USD	1,365,000		(8,190)		(26,648)		18,458
Devon Energy Corp.	1/21/22		55.00		78	USD	429,000		(546)		(2,795)		2,249
DiamondBack Energy, Inc.	1/21/22		140.00		32	USD	448,000		(320)		(10,489)		10,169
Exxon Mobil Corp.	1/21/22		70.00		43	USD	301,000		(129)		(1,823)		1,694
Freeport-McMoRan, Inc.	1/21/22		46.00		172	USD	791,200		(4,644)		(19,780)		15,136
Freeport-McMoRan, Inc.	1/21/22		49.00		187	USD	916,300		(1,309)		(18,472)		17,163
Global Payments, Inc.	1/21/22		195.00		44	USD	858,000		(83)		(4,301)		4,218
iShares MSCI Emerging Markets ETF	1/21/22		57.00		385	USD	2,194,500		(52)		(7,229)		7,177
Lowes Co., Inc.	1/21/22		270.00		30	USD	810,000		(3,690)		(7,168)		3,478
Micron Technology, Inc.	1/21/22		92.50		21	USD	194,250		(7,140)		(7,811)		671
MongoDB, Inc.	1/21/22		680.00		6	USD	408,000		(326)		(8,387)		8,061
Ovintiv, Inc.	1/21/22		50.00		80	USD	400,000		(210)		(6,302)		6,092
SPDR S&P 500 Trust	1/21/22		488.00		87	USD	4,245,600		(6,699)		(13,229)		6,530
Tesla, Inc.	1/21/22		1,400.00		8	USD	1,120,000		(2,760)		(12,774)		10,014
The TJX Cos., Inc.	1/21/22		77.50		64	USD	496,000		(5,184)		(2,802)		(2,382)
Uber Technologies, Inc.	1/21/22		60.00		212	USD	1,272,000		(212)		(9,479)		9,267
Zscaler, Inc.	1/21/22		410.00		10	USD	410,000		(200)		(7,203)		7,003
Alphabet, Inc.	2/18/22		3,400.00		3	USD	1,020,000		(1,620)		(13,181)		11,561
ARK Innovation ETF	2/18/22		108.00		85	USD	918,000		(11,220)		(15,621)		4,401
D.R. Horton, Inc.	2/18/22		115.00		94	USD	1,081,000		(21,244)		(24,122)		2,878
Ford Motor Co.	2/18/22		27.00		306	USD	826,200		(4,590)		(9,724)		5,134
The Home Depot, Inc.	2/18/22		440.00		32	USD	1,408,000		(12,960)		(12,163)		(797)
iShares China Large-Cap ETF	2/18/22		42.00		370	USD	1,554,000		(4,070)		(9,939)		5,869
iShares China Large-Cap ETF	2/18/22		48.00		651	USD	3,124,800		(986)		(16,739)		15,753
Marsh & McLennan Cos., Inc.	2/18/22		180.00		61	USD	1,098,000		(10,980)		(9,796)		(1,184)
McDonald's Corp.	2/18/22		280.00		41	USD	1,148,000		(8,323)		(10,062)		1,739
Micron Technology, Inc.	2/18/22		100.00		41	USD	410,000		(10,250)		(5,158)		(5,092)
Micron Technology, Inc.	2/18/22		105.00		41	USD	430,500		(6,109)		(10,077)		3,968
Microsoft Corp.	2/18/22		365.00		68	USD	2,482,000		(17,340)		(32,489)		15,149
Microsoft Corp.	2/18/22		380.00		34	USD	1,292,000		(3,604)		(11,151)		7,547
NVIDIA Corp.	2/18/22		350.00		26	USD	910,000		(12,480)		(17,189)		4,709
DexCom, Inc.	3/18/22		680.00		10	USD	680,000		(4,900)		(6,018)		1,118
NextEra Energy, Inc.	3/18/22		100.00		168	USD	1,680,000		(18,480)		(15,755)		(2,725)
UnitedHealth Group, Inc.	3/18/22		530.00		9	USD	477,000		(8,820)		(4,751)		(4,069)
Twilio, Inc.	4/14/22		390.00		18	USD	702,000		(3,402)		(13,668)		10,266
General Motors Co.	6/17/22		80.00		123	USD	984,000		(13,530)		(11,731)		(1,799)
								$	(295,832)	$	(579,574)	$	283,742

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

Put
Cboe Volatility Index	1/19/22	18.00	376	USD	676,800	$	(30,080)	$	(22,101)	$	(7,979)
Alcoa Corp.	1/21/22	40.00	112	USD	448,000		(784)		(20,685)		19,901
Alibaba Group Holding Ltd.	1/21/22	150.00	40	USD	600,000		(126,000)		(20,311)		(105,689)
Aptiv PLC	1/21/22	150.00	23	USD	345,000		(1,610)		(5,469)		3,859
Atlassian Corp. PLC	1/21/22	380.00	8	USD	304,000		(9,240)		(4,782)		(4,458)
Autodesk, Inc.	1/21/22	270.00	21	USD	567,000		(6,720)		(27,148)		20,428
Boston Scientific Corp.	1/21/22	38.00	84	USD	319,200		(1,008)		(4,601)		3,593
BP PLC	1/21/22	25.00	89	USD	222,500		(1,602)		(4,242)		2,640
CF Industries Holdings, Inc.	1/21/22	52.50	38	USD	199,500		(134)		(5,633)		5,499
Comcast Corp.	1/21/22	50.00	116	USD	580,000		(10,904)		(12,669)		1,765
D.R. Horton, Inc.	1/21/22	90.00	48	USD	432,000		(864)		(8,014)		7,150
Deere & Co.	1/21/22	320.00	8	USD	256,000		(1,184)		(4,719)		3,535
Devon Energy Corp.	1/21/22	35.00	28	USD	98,000		(364)		(4,278)		3,914
Dick's Sporting Goods, Inc.	1/21/22	100.00	42	USD	420,000		(2,730)		(8,449)		5,719
Dick's Sporting Goods, Inc.	1/21/22	110.00	19	USD	209,000		(4,275)		(5,487)		1,212
Edwards Lifesciences Corp.	1/21/22	105.00	32	USD	336,000		(160)		(5,377)		5,217
Energy Transfer LP	1/21/22	8.00	224	USD	179,200		(3,360)		(8,236)		4,876
FedEx Corp.	1/21/22	220.00	13	USD	286,000		(143)		(7,814)		7,671
Generac Holdings, Inc.	1/21/22	360.00	3	USD	108,000		(5,127)		(2,824)		(2,303)
Global Payments, Inc.	1/21/22	135.00	33	USD	445,500		(12,540)		(6,197)		(6,343)
Intuitive Surgical, Inc.	1/21/22	320.00	10	USD	320,000		(1,990)		(2,828)		838
iShares iBoxx $ High Yield Corporate Bond ETF	1/21/22	78.00	374	USD	2,917,200		(89)		(10,015)		9,926
iShares iBoxx $ High Yield Corporate Bond ETF	1/21/22	80.00	748	USD	5,984,000		(2,244)		(14,046)		11,802
iShares iBoxx $ High Yield Corporate Bond ETF	1/21/22	81.00	16	USD	129,600		(16)		(316)		300
Microsoft Corp.	1/21/22	300.00	23	USD	690,000		(1,357)		(9,379)		8,022
MongoDB, Inc.	1/21/22	490.00	6	USD	294,000		(5,208)		(11,087)		5,879
O'Reilly Automotive, Inc.	1/21/22	560.00	5	USD	280,000		(63)		(3,489)		3,426
salesforce.com, Inc.	1/21/22	240.00	12	USD	288,000		(1,908)		(4,627)		2,719
salesforce.com, Inc.	1/21/22	250.00	59	USD	1,475,000		(23,895)		(24,643)		748
Uber Technologies, Inc.	1/21/22	40.00	48	USD	192,000		(4,800)		(6,410)		1,610
Zscaler, Inc.	1/21/22	290.00	10	USD	290,000		(3,120)		(6,228)		3,108
Alphabet, Inc.	2/18/22	2,700.00	3	USD	810,000		(12,840)		(15,580)		2,740
Generac Holdings, Inc.	2/18/22	300.00	3	USD	90,000		(1,770)		(2,211)		441
Live Nation Entertainment, Inc.	2/18/22	85.00	33	USD	280,500		(1,980)		(11,670)		9,690
Micron Technology, Inc.	2/18/22	72.50	41	USD	297,250		(1,230)		(7,576)		6,346
salesforce.com, Inc.	2/18/22	230.00	39	USD	897,000		(10,257)		(17,562)		7,305
Twilio, Inc.	2/18/22	200.00	14	USD	280,000		(4,200)		(11,249)		7,049
U.S. Treasury Note 10 Year Future	2/18/22	127.50	206	USD	26,876,563		(32,188)		(44,705)		12,517
DexCom, Inc.	3/18/22	580.00	7	USD	406,000		(43,890)		(20,886)		(23,004)
UnitedHealth Group, Inc.	3/18/22	430.00	9	USD	387,000		(3,465)		(7,990)		4,525
BP PLC	4/14/22	24.00	480	USD	1,152,000		(37,920)		(31,598)		(6,322)
Twilio, Inc.	4/14/22	260.00	18	USD	468,000		(44,190)		(35,254)		(8,936)
						$	(457,449)	$	(488,385)	$	30,936
						$	(753,281)	$	(1,067,959)	$	314,678

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

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)
Put
Sell Protection on 5-Year Credit Default Swap, 12/20/26	Bank of America N.A.	1/19/22	101.00	CDX. NA.HY Series 37†	Quarterly	5.000%	Semi-Annually	USD	285,000	$	(15)	$	(234)	$	219
Sell Protection on 5-Year Credit Default Swap, 12/20/26	Goldman Sachs International	1/19/22	101.00	CDX. NA.HY Series 37†	Quarterly	5.000%	Semi-Annually	USD	415,000		(22)		(415)		393
Sell Protection on 5-Year Credit Default Swap, 12/20/26	JP Morgan Chase Bank N.A.	1/19/22	85.00	CDX. NA.IG Series 37†	Quarterly	1.000%	Semi-Annually	USD	2,345,000		(61)		(774)		713
Sell Protection on 5-Year Credit Default Swap, 12/20/26	Morgan Stanley & Co. LLC	1/19/22	101.00	CDX. NA.HY Series 37†	Quarterly	5.000%	Semi-Annually	USD	340,000		(18)		(289)		271
										$	(116)	$	(1,712)	$	1,596

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)

Call

1-Year Interest Rate Swap, 3/20/24

Morgan Stanley & Co. LLC

3/16/23

0.40%##

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

USD

36,619,299

$

(7,697)

$

(40,281)

$

32,584

1-Year Interest Rate Swap, 3/20/24

Morgan Stanley & Co. LLC

3/16/23

0.60%##

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

USD

36,619,299

(14,937)

(69,577)

54,640

(22,634)

(109,858)

87,224

Put

5-Year Interest Rate Swap, 6/17/31

Barclays Bank PLC

6/15/26

3-Month USD LIBOR BBA

Quarterly

3.04%##

Semi-Annually

USD

5,700,000

$

(67,277)

$

(95,475)

$

28,198

5-Year Interest Rate Swap, 6/17/31

Barclays Bank PLC

6/15/26

3-Month USD LIBOR BBA

Quarterly

3.04%##

Semi-Annually

USD

5,696,231

(67,232)

(95,269)

28,037

5-Year Interest Rate Swap, 7/7/27

Citibank N.A.

1/05/22

3-Month USD LIBOR BBA

Quarterly

1.39%##

Semi-Annually

USD

11,121,046

(13,205)

(26,103)

12,898

5-Year Interest Rate Swap, 1/10/27

Deutsche Bank AG

1/06/22

3-Month USD LIBOR BBA

Quarterly

1.42%##

Semi-Annually

USD

2,265,872

(2,114)

(4,758)

2,644

5-Year Interest Rate Swap, 1/10/27

Deutsche Bank AG

1/06/22

3-Month USD LIBOR BBA

Quarterly

1.42%##

Semi-Annually

USD

2,265,872

(2,114)

(4,645)

2,531

10-Year Interest Rate Swap, 1/28/32

Goldman Sachs International

1/26/22

3-Month USD LIBOR BBA

Quarterly

1.76%##

Semi-Annually

USD

6,955,806

(16,232)

(57,907)

41,675

10-Year Interest Rate Swap, 1/28/32

Goldman Sachs International

1/26/22

3-Month USD LIBOR BBA

Quarterly

1.76%##

Semi-Annually

USD

3,477,903

(8,116)

(28,258)

20,142

5-Year Interest Rate Swap, 2/9/27

Goldman Sachs International

2/07/22

3-Month USD LIBOR BBA

Quarterly

1.63%##

Semi-Annually

USD

15,098,032

(23,912)

(47,106)

23,194

2-Year Interest Rate Swap, 3/18/24

Goldman Sachs International

3/16/22

1-Day SOFR

Semi-Annually

1.08%##

Semi-Annually

USD

30,652,276

(41,371)

(31,878)

(9,493)

5-Year Interest Rate Swap, 1/14/27

Morgan Stanley & Co. LLC

1/12/22

3-Month USD LIBOR BBA

Quarterly

1.47%##

Semi-Annually

USD

1,651,779

(1,785)

(4,592)

2,807

5-Year Interest Rate Swap, 7/2/31

Morgan Stanley & Co. LLC

6/30/26

3-Month USD LIBOR BBA

Quarterly

3.04%##

Semi-Annually

USD

5,226,729

(62,078)

(70,561)

8,483

(305,436)

(466,552)

161,116

$

(328,070)

$

(576,410)

$

248,340

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
Bank of America N.A.	1/20/22	USD	1,049,429	EUR	902,000	$	22,176
Bank of America N.A.	2/17/22	JPY	239,929,000	USD	2,096,510		(10,052)
Bank of America N.A.	3/10/22	USD	1,671,374	SEK	15,171,206		(8,444)
Bank of America N.A.	3/17/22	GBP	1,036,309	EUR	1,213,798		18,292
Barclays Bank PLC	2/03/22	EUR	898,513	USD	1,013,142		10,429
Barclays Bank PLC	3/10/22	JPY	1,212,990,826	USD	10,691,549		(141,372)
Barclays Bank PLC	3/17/22	GBP	1,316,913	USD	1,747,536		34,421
Barclays Bank PLC	3/17/22	USD	403,731	INR	30,841,814		(7,859)
BNP Paribas SA	1/20/22	USD	8,306,083	EUR	7,135,013		180,291
BNP Paribas SA	2/03/22	NOK	15,326,958	CHF	1,639,685		(61,375)
BNP Paribas SA	2/11/22	USD	3,236,923	CNH	20,875,726		(38,947)
BNP Paribas SA	2/17/22	AUD	2,212,000	USD	1,618,397		(8,876)
BNP Paribas SA	3/03/22	USD	1,052,071	INR	79,334,467		(8,517)
BNP Paribas SA	3/17/22	EUR	12,974,603	USD	14,695,165		98,466
Citibank N.A.	1/20/22	JPY	160,967,000	USD	1,409,559		(10,061)
Citibank N.A.	1/20/22	USD	1,719,680	JPY	195,242,136		22,183
Citibank N.A.	1/27/22	CNH	3,320,318	USD	517,014		4,546
Citibank N.A.	2/11/22	CNH	20,875,726	USD	3,258,319		17,551
Citibank N.A.	2/24/22	KRW	3,122,349,000	USD	2,633,138		(9,457)
Citibank N.A.	3/10/22	EUR	1,529,449	USD	1,723,827		19,759
Citibank N.A.	3/10/22	USD	1,365,810	INR	103,805,674		(20,720)
Citibank N.A.	3/16/22	EUR	1,517,456	USD	1,710,120		20,041
Citibank N.A.	3/16/22	USD	1,378,889	EUR	1,216,209		(7,798)
Citibank N.A.	3/17/22	RUB	64,316,346	USD	857,151		(13,249)
Deutsche Bank AG	1/20/22	GBP	1,777,000	USD	2,451,469		(46,289)
Deutsche Bank AG	1/20/22	USD	1,705,846	NOK	14,314,000		80,937
Deutsche Bank AG	2/10/22	EUR	1,660,686	USD	1,929,328		(37,236)
Deutsche Bank AG	2/17/22	NOK	9,403,930	CHF	993,363		(24,417)
Deutsche Bank AG	3/10/22	JPY	341,816,505	USD	3,012,374		(39,372)
Deutsche Bank AG	3/17/22	USD	3,193,448	CNH	20,476,386		(12,854)
Goldman Sachs International	1/20/22	CAD	2,182,000	USD	1,760,380		(35,435)
Goldman Sachs International	1/20/22	MXN	31,097,000	USD	1,513,380		1,330
Goldman Sachs International	1/20/22	JPY	162,040,000	USD	1,419,862		(11,035)
Goldman Sachs International	2/17/22	AUD	1,867,239	USD	1,359,891		(1,229)
HSBC Bank PLC	1/27/22	IDR	10,179,488,000	USD	711,305		1,727
HSBC Bank PLC	2/10/22	USD	2,792,275	HKD	21,748,194		2,982
HSBC Bank PLC	2/10/22	USD	1,025,083	JPY	117,126,738		6,585
HSBC Bank PLC	3/08/22	USD	1,229,630	BRL	7,075,904		(21,477)
HSBC Bank PLC	3/17/22	GBP	1,053,587	USD	1,393,153		32,489
JP Morgan Chase Bank	1/06/22	EUR	3,000,000	USD	3,488,849		(73,217)
JP Morgan Chase Bank	1/06/22	USD	2,763,162	CNH	17,939,000		(58,419)
JP Morgan Chase Bank	1/13/22	JPY	193,028,615	EUR	1,472,000		1,996
JP Morgan Chase Bank	1/20/22	USD	1,124,145	JPY	127,764,864		13,317
JP Morgan Chase Bank	3/17/22	JPY	547,598,479	USD	4,821,534		(58,271)
Morgan Stanley & Co. LLC	1/20/22	CAD	2,186,000	USD	1,768,837		(40,730)
Morgan Stanley & Co. LLC	1/20/22	JPY	323,666,718	EUR	2,443,000		31,822
Morgan Stanley & Co. LLC	1/20/22	USD	1,565,591	EUR	1,347,168		31,353
Morgan Stanley & Co. LLC	2/03/22	USD	1,043,126	EUR	898,513		19,555
Morgan Stanley & Co. LLC	3/03/22	AUD	1,873,952	USD	1,340,269		23,304
Morgan Stanley & Co. LLC	3/03/22	USD	1,856,976	SEK	16,753,769		2,064
Morgan Stanley & Co. LLC	3/10/22	USD	1,342,630	NZD	1,989,134		(18,421)
Morgan Stanley & Co. LLC	3/17/22	BRL	5,790,577	USD	1,014,627		6,571
Morgan Stanley & Co. LLC	3/22/22	JPY	1,484,069,000	USD	13,103,171		(193,207)
UBS AG	1/13/22	USD	2,494,902	CNH	16,190,642		(50,826)
UBS AG	1/27/22	USD	515,655	CNH	3,320,318		(5,905)
UBS AG	1/27/22	USD	2,788,596	HKD	21,696,594		5,995
UBS AG	2/10/22	JPY	271,810,677	USD	2,410,146		(46,563)
UBS AG	3/17/22	CAD	1,552,265	USD	1,207,326		19,623
UBS AG	3/24/22	EUR	2,401,163	USD	2,709,924		28,335
						$	(363,490)

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/ Net Unrealized Appreciation/ (Depreciation)
Long
Euro-BTP	3/08/22		45	$	7,682,024	$	(150,337)
Euro-Bund	3/08/22		66		13,097,140		(220,231)
Japan Bonds 10 Year	3/14/22		6		7,925,516		(18,535)
Australia Bonds 10 Year	3/15/22		100		10,116,346		8,773
S&P TSX 60 Index	3/17/22		3		597,223		10,342
E-mini Russell 2000 Index	3/18/22		69		7,620,577		117,083
FTSE 100 Index	3/18/22		20		1,948,134		34,546
FTSE MIB Index	3/18/22		3		452,731		12,596
Mini MSCI Emerging Market Index	3/18/22		15		929,487		(9,762)
U.S. Treasury Long Bond	3/22/22		19		3,006,931		41,382
U.S. Treasury Note 10 Year	3/22/22		171		22,175,571		134,585
U.S. Treasury Note 5 Year	3/31/22		660		79,576,460		268,072
						$	228,514
Short
Euro-Buxl 30 Year Bond	3/08/22		14	$	(3,471,909)	$	176,681
Yen Denom Nikkei Index	3/10/22		1		(124,986)		(307)
Euro Stoxx 50 Index	3/18/22		44		(2,094,680)		(53,100)
Nasdaq 100 E Mini Index	3/18/22		15		(4,899,016)		2,791
S&P 500 E Mini Index	3/18/22		214		(50,200,493)		(715,457)
U.S. Treasury Note Ultra 10 Year	3/22/22		267		(38,803,685)		(295,128)
U.S. Treasury Ultra Bond	3/22/22		1		(197,956)		831
UK Long Gilt	3/29/22		21		(3,535,992)		(14,234)
U.S. Treasury Note 2 Year	3/31/22		110		(24,033,630)		34,724
						$	(863,199)

Centrally Cleared Credit Default Swaps - Buy Protection
Reference Obligation/Index	Rate Paid by Fund	Payment Frequency		Termination Date		Notional Amount		Value		Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
CDX.NA.IG Series 33†	1.000%		Quarterly		12/20/2024	USD	22,361,180	$	(400,466)	$	(493,336)	$	92,870
CDX.NA.IG Series 36†	1.000%		Quarterly		6/20/2026	USD	1,398,129		(33,970)		(34,695)		725
								$	(434,436)	$	(528,031)	$	93,595

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

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)
Avis Budget Group, Inc.	5.000%		Quarterly		Bank of America N.A.		12/20/26	USD	326,000	$	(43,761)	$	(48,061)	$	4,300
Bombardier, Inc.	5.000%		Quarterly		Barclays Bank PLC		6/20/23	USD	230,995		(6,838)		33,494		(40,332)
										$	(50,599)	$	(14,567)	$	(36,032)

Centrally Cleared Credit Default Swap - 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)
iTraxx Europe Crossover Series 34†	5.000%		Quarterly		12/20/25		BB-	EUR	1,860,490	$	250,291	$	173,481	$	76,810
iTraxx Europe Crossover Series 35†	5.000%		Quarterly		6/20/26		BB-	EUR	1,372,000		182,182		194,359		(12,177)
iTraxx Europe Crossover Series 36†	5.000%		Quarterly		12/20/26		BB-	EUR	3,666,941		492,845		499,956		(7,111)
CDX.NA.HY Series 37†	5.000%		Quarterly		12/20/26		BB-	USD	3,370,791		308,100		296,414		11,686
										$	1,233,418	$	1,164,210	$	69,208

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)
Trust Fibra Uno	1.000%		Quarterly		Citibank N.A.		Baa2		6/20/26	USD	104,000	$	(3,001)	$	(11,477)	$	8,476
Trust Fibra Uno	1.000%		Quarterly		Citibank N.A.		Baa2		6/20/26	USD	19,000		(548)		(2,084)		1,536
												$	(3,549)	$	(13,561)	$	10,012

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

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 0.020%

Annually

6-Month EURIBOR

Semi-Annually

8/26/31

EUR

2,752,656

$

80,789

$

62

$

80,727

28 Day- MXN-TIIE-Banxico

Monthly

Fixed 4.415%

Monthly

2/28/23

MXN

25,811,467

(37,500)

10

(37,510)

28 Day- MXN-TIIE-Banxico

Monthly

Fixed 4.495%

Monthly

3/03/23

MXN

25,803,353

(36,631)

10

(36,641)

28 Day- MXN-TIIE-Banxico

Monthly

Fixed 4.680%

Monthly

2/27/24

MXN

18,315,395

(48,389)

7

(48,396)

28 Day- MXN-TIIE-Banxico

Monthly

Fixed 4.855%

Monthly

3/01/24

MXN

18,315,395

(45,384)

7

(45,391)

28 Day- MXN-TIIE-Banxico

Monthly

Fixed 6.478%

Monthly

8/12/26

MXN

15,361,130

(28,033)

10

(28,043)

28 Day- MXN-TIIE-Banxico

Monthly

Fixed 6.465%

Monthly

8/13/26

MXN

21,092,847

(39,008)

13

(39,021)

28 Day- MXN-TIIE-Banxico

Monthly

Fixed 6.428%

Monthly

8/13/26

MXN

21,207,351

(40,758)

13

(40,771)

28 Day- MXN-TIIE-Banxico

Monthly

Fixed 6.440%

Monthly

8/14/26

MXN

10,432,408

(19,804)

6

(19,810)

28 Day- MXN-TIIE-Banxico

Monthly

Fixed 6.415%

Monthly

8/14/26

MXN

17,195,149

(33,473)

11

(33,484)

28 Day- MXN-TIIE-Banxico

Monthly

Fixed 6.420%

Monthly

8/17/26

MXN

15,490,115

(30,021)

9

(30,030)

Fixed 1.060%

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

3/27/22

USD

27,703,212

(56,401)

218

(56,619)

Fixed 0.880%

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

8/17/22

USD

15,490,278

(51,163)

122

(51,285)

Fixed 0.398%

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

3/08/24

USD

23,190,000

288,969

184

288,785

Fixed 0.526%

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

6/06/24

USD

5,548,326

74,574

43

74,531

Fixed 0.574%

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

6/28/24

USD

5,258,177

62,292

66

62,226

Fixed 0.510%

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

7/13/24

USD

4,871,565

67,502

60

67,442

Fixed 0.547%

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

7/16/24

USD

7,348,639

95,231

91

95,140

Fixed 0.551%

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

7/20/24

USD

4,868,729

63,424

60

63,364

Fixed 0.553%

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

7/20/24

USD

2,434,364

31,619

30

31,589

Fixed 0.492%

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

7/23/24

USD

4,805,476

69,986

52

69,934

Fixed 0.495%

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

7/23/24

USD

4,805,476

69,621

52

69,569

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

Fixed 0.557%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	8/12/24	USD	7,351,186	99,360	80	99,280
Fixed 0.569%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	8/13/24	USD	4,783,300	63,350	52	63,298
Fixed 0.565%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	8/27/24	USD	2,406,020	33,101	26	33,075
Fixed 0.568%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	8/27/24	USD	2,406,020	32,943	26	32,917
Fixed 0.569%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	8/27/24	USD	2,381,960	32,520	26	32,494
Fixed 0.571%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	8/27/24	USD	2,418,048	32,904	26	32,878
Fixed 0.573%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	8/27/24	USD	2,418,040	32,784	26	32,758
Fixed 1.600%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	1/24/25	USD	10,965,933	(144,049)	286	(144,335)
Fixed 0.351%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	8/27/25	USD	4,334,000	139,315	54	139,261
3-Month USD LIBOR BBA	Quarterly	Fixed 0.370%	Semi-Annually	10/29/25	USD	12,517,428	(419,222)	157	(419,379)
3-Month USD LIBOR BBA	Quarterly	Fixed 0.455%	Semi-Annually	11/23/25	USD	3,480,000	(108,338)	44	(108,382)
3-Month USD LIBOR BBA	Quarterly	Fixed 0.385%	Semi-Annually	2/10/26	USD	8,745,368	(318,151)	109	(318,260)
Fixed 0.682%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	2/19/26	USD	4,277,961	105,506	53	105,453
Fixed 0.700%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	2/22/26	USD	1,169,132	28,080	15	28,065
3-Month USD LIBOR BBA	Quarterly	Fixed 0.834%	Semi-Annually	3/08/26	USD	14,230,000	(268,355)	177	(268,532)
Fixed 0.620%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	4/08/26	USD	8,487,296	241,534	107	241,427
3-Month USD LIBOR BBA	Quarterly	Fixed 0.870%	Semi-Annually	4/08/26	USD	8,487,296	(152,829)	107	(152,936)
Fixed 0.600%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	4/08/26	USD	20,612,004	603,817	259	603,558
3-Month USD LIBOR BBA	Quarterly	Fixed 0.850%	Semi-Annually	4/08/26	USD	20,612,004	(388,390)	259	(388,649)
Fixed 0.630%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	5/26/26	USD	19,779,000	580,655	248	580,407
Fixed 0.850%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	5/27/26	USD	9,981,909	198,543	125	198,418
Fixed 0.640%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	5/27/26	USD	29,945,725	866,671	376	866,295
3-Month USD LIBOR BBA	Quarterly	Fixed 0.976%	Semi-Annually	6/28/26	USD	3,154,906	(47,648)	40	(47,688)
3-Month USD LIBOR BBA	Quarterly	Fixed 0.874%	Semi-Annually	7/13/26	USD	2,870,743	(56,867)	36	(56,903)

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

Fixed 0.940%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	10/14/26	USD	1,682,837	31,481	21	31,460
Fixed 1.165%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	10/14/26	USD	2,642,901	21,667	33	21,634
Fixed 1.150%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	11/10/26	USD	7,007,033	65,027	88	64,939
Fixed 0.690%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	6/23/30	USD	1,360,000	91,009	24	90,985
3-Month USD LIBOR BBA	Quarterly	Fixed 1.080%	Semi-Annually	8/17/30	USD	3,116,195	(113,563)	56	(113,619)
3-Month USD LIBOR BBA	Quarterly	Fixed 0.639%	Semi-Annually	8/21/30	USD	1,490,558	(108,338)	27	(108,365)
3-Month USD LIBOR BBA	Quarterly	Fixed 0.675%	Semi-Annually	9/14/30	USD	526,252	(37,108)	9	(37,117)
Fixed 0.710%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	9/25/30	USD	800,000	54,365	14	54,351
3-Month USD LIBOR BBA	Quarterly	Fixed 0.660%	Semi-Annually	9/25/30	USD	800,000	(57,649)	14	(57,663)
3-Month USD LIBOR BBA	Quarterly	Fixed 0.693%	Semi-Annually	9/29/30	USD	640,000	(44,445)	12	(44,457)
Fixed 0.764%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	9/29/30	USD	640,000	40,671	12	40,659
Fixed 0.810%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	11/23/30	USD	2,290,817	139,964	42	139,922
Fixed 1.173%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	2/04/31	USD	1,508,382	47,864	27	47,837
Fixed 1.195%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	2/05/31	USD	889,175	26,511	16	26,495
3-Month USD LIBOR BBA	Quarterly	Fixed 1.400%	Semi-Annually	4/07/31	USD	6,584,667	(84,236)	121	(84,357)
3-Month USD LIBOR BBA	Quarterly	Fixed 1.420%	Semi-Annually	4/08/31	USD	3,793,814	(41,942)	70	(42,012)
Fixed 1.570%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	5/27/31	USD	2,494,308	(4,335)	46	(4,381)
Fixed 1.540%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	5/28/31	USD	442,341	389	8	381
Fixed 2.179%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	6/17/31	USD	3,820,000	(70,059)	59	(70,118)
Fixed 2.180%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	6/17/31	USD	3,756,231	(69,105)	58	(69,163)
Fixed 2.162%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	6/18/31	USD	3,820,000	(67,024)	59	(67,083)
Fixed 1.994%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	7/02/31	USD	3,658,729	(35,868)	57	(35,925)

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

Fixed 1.990%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	7/02/31	USD	1,568,000	(15,085)	24	(15,109)
Fixed 1.400%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	10/12/31	USD	2,143,673	32,204	39	32,165
Fixed 1.383%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	10/14/31	USD	1,312,043	21,775	24	21,751
Fixed 1.380%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	10/14/31	USD	1,904,115	32,128	34	32,094
3-Month USD LIBOR BBA	Quarterly	Fixed 1.590%	Semi-Annually	10/14/31	USD	9,925,889	24,746	181	24,565
3-Month USD LIBOR BBA	Quarterly	Fixed 1.620%	Semi-Annually	11/19/31	USD	6,729,307	33,639	123	33,516
Fixed 1.443%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	11/26/31	USD	1,147,099	13,292	21	13,271
Fixed 1.412%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	11/30/31	USD	795,815	11,508	14	11,494
Fixed 1.699%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	11/26/41	USD	615,517	4,630	18	4,612
Fixed 0.885%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	7/02/50	USD	1,012,000	198,086	33	198,053
Fixed 0.875%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	7/21/50	USD	665,841	131,985	22	131,963
3-Month USD LIBOR BBA	Quarterly	Fixed 1.080%	Semi-Annually	9/28/50	USD	341,000	(51,458)	11	(51,469)
3-Month USD LIBOR BBA	Quarterly	Fixed 1.075%	Semi-Annually	9/28/50	USD	1,453,737	(221,084)	48	(221,132)
3-Month USD LIBOR BBA	Quarterly	Fixed 1.070%	Semi-Annually	10/21/50	USD	998,761	(153,212)	34	(153,246)
Fixed 1.270%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	10/23/50	USD	2,145,000	228,022	73	227,949
Fixed 1.170%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	10/28/50	USD	848,013	110,142	29	110,113
3-Month USD LIBOR BBA	Quarterly	Fixed 0.970%	Semi-Annually	10/28/50	USD	816,000	(144,443)	27	(144,470)
Fixed 0.980%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	10/29/50	USD	2,472,955	431,739	84	431,655
Fixed 1.300%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	11/19/50	USD	1,876,740	186,512	63	186,449
Fixed 1.220%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	11/27/50	USD	848,013	100,344	29	100,315

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

Fixed 1.450%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	12/11/50	USD	616,988		39,508		21		39,487
3-Month USD LIBOR BBA	Quarterly	Fixed 1.200%	Semi-Annually	12/22/50	USD	3,275,100		(403,522)		111		(403,633)
Fixed 1.270%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	12/30/50	USD	848,013		90,366		29		90,337
Fixed 1.445%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	1/07/51	USD	2,018,820		131,702		68		131,634
Fixed 1.520%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	1/08/51	USD	691,273		32,816		23		32,793
Fixed 1.625%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	1/25/51	USD	1,484,866		33,441		50		33,391
Fixed 1.480%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	1/28/51	USD	2,638,779		150,221		88		150,133
Fixed 1.575%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	2/01/51	USD	1,530,734		52,695		51		52,644
Fixed 1.660%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	2/04/51	USD	858,617		12,233		29		12,204
Fixed 1.680%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	2/05/51	USD	889,175		8,450		30		8,420
3-Month USD LIBOR BBA	Quarterly	Fixed 1.238%	Semi-Annually	2/10/51	USD	2,385,100		(273,238)		80		(273,318)
Fixed 0.888%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	2/10/51	USD	1,590,067		314,328		53		314,275
Fixed 1.912%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	2/22/51	USD	347,273		(15,877)		12		(15,889)
Fixed 2.010%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	5/27/51	USD	1,290,159		(90,238)		44		(90,282)
Fixed 1.973%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	5/28/51	USD	212,324		(12,985)		7		(12,992)
Fixed 2.035%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	6/07/51	USD	401,839		(30,533)		14		(30,547)
3-Month USD LIBOR BBA	Quarterly	Fixed 1.827%	Semi-Annually	6/22/51	USD	882,938		23,031		30		23,001
Fixed 1.626%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	8/23/51	USD	307,469		6,709		10		6,699
Fixed 1.850%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	10/15/51	USD	430,377		(13,991)		14		(14,005)
Fixed 1.820%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	10/18/51	USD	668,374		(16,896)		22		(16,918)
3-Month USD LIBOR BBA	Quarterly	Fixed 1.835%	Semi-Annually	11/08/51	USD	726,300		21,076		24		21,052
Fixed 1.705%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	11/30/51	USD	291,425		698		10		688
							$	2,445,416	$	6,474	$	2,438,942

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

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 9.385%

Maturity

JP Morgan Chase Bank N.A.

1/02/25

BRL

7,665,832

$

(30,774)

$

—

$

(30,774)

BRL CDI

Maturity

Fixed 9.420%

Maturity

JP Morgan Chase Bank N.A.

1/02/25

BRL

8,362,847

(32,159)

—

(32,159)

BRL CDI

Maturity

Fixed 9.540%

Maturity

JP Morgan Chase Bank N.A.

1/02/25

BRL

8,332,021

(26,410)

—

(26,410)

$

(89,343)

$

—

$

(89,343)

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)

Snap, Inc., Class A

2,997

Maturity

1Day-SOFR + 18 bp

USD 132,942

Maturity

BNP Paribas SA

3/16/22

$

(8,007)

$

—

$

(8,007)

Snap, Inc., Class A

8,000

Maturity

1Day-SOFR + 25 bp

USD 362,256

Maturity

BNP Paribas SA

3/17/22

(13,984)

—

(13,984)

Universal Health Services, Inc.

519

Quarterly

1Day-SOFR + 8 bp

USD 66,352

Quarterly

BNP Paribas SA

6/10/22

(941)

—

(941)

Markit iBoxx USD Liquid Leveraged Loan Index

6,400

Maturity

12Month-SOFR + 60 bp

USD 847,232

Maturity

Citibank N.A.

1/19/22

(896)

—

(896)

Markit iBoxx USD Liquid Leveraged Loan Index

4,925

Maturity

12Month-SOFR + 210 bp

USD 429,657

Maturity

Citibank N.A.

1/19/22

1,133

—

1,133

Markit iBoxx USD Liquid Leveraged Loan Index

3,161

Maturity

12Month-SOFR + 60 bp

USD 416,557

Maturity

Citibank N.A.

1/21/22

(2,339)

—

(2,339)

3-Month USD LIBOR BBA USD

USD

552,066

Quarterly

Markit iBoxx USD Liquid Leveraged Loan Index

3,006

Maturity

Goldman Sachs International

3/20/22

2,517

—

2,517

3-Month USD LIBOR BBA USD

USD

552,067

Quarterly

Markit iBoxx USD Liquid Leveraged Loan Index

3,004

Maturity

Goldman Sachs International

6/20/22

3,499

—

3,499

3-Month USD LIBOR BBA USD

USD

368,045

Quarterly

Markit iBoxx USD Liquid Leveraged Loan Index

2,001

Quarterly

Morgan Stanley & Co. LLC

3/20/22

1,174

—

1,174

3-Month USD LIBOR BBA USD

USD

368,044

Quarterly

Markit iBoxx USD Liquid Leveraged Loan Index

2,002

Maturity

Morgan Stanley & Co. LLC

6/20/22

2,333

—

2,333

$

(15,511)

$

—

$

(15,511)

MassMutual Select BlackRock Global Allocation Fund Consolidated —  Portfolio of Investments (Continued)

OTC Total Return Swaps
Reference Entity	Counterparty	Termination Date	Notional Amount		Net Value of Reference Entities			Unrealized Appreciation/ (Depreciation)			Gross Notional Amount Asset %
Equity Securities Short (a)	Citigroup Global Markets Inc.	01/26/2022 - 02/24/2023	USD	(1,409,694)	$	(1,409,701	)	$	(23,054	)	0.2%
Equity Securities Short (b)	JP Morgan Chase Bank N.A.	02/08/2023	USD	(2,149,481)		(2,133,652	)		15,829		0.3%
					$	(3,543,346	)	$	(7,225	)

##	Exercise Rate
(a)	The Fund pays the total return on a portfolio of short positions underlying the total return swap. In addition, the Fund pays or receives a variable rate of interest, based on a specific benchmark, plus or minus a spread in a range of 17.5 to 150 basis points. Net payments are exchanged monthly. The benchmark and spread are determined based upon the country and/or currency of the individual underlying positions. The following are the specified benchmarks used in determining the variable rate of interest: 1 month USD LIBOR 1 week USD LIBOR
(b)	The Fund pays the total return on a portfolio of short positions underlying the total return swap. In addition, the Fund pays or receives a variable rate of interest, based on a specific benchmark, plus or minus a spread in a range of 17.5 to 150 basis points. Net payments are exchanged monthly. The benchmark and spread are determined based upon the country and/or currency of the individual underlying positions. The following are the specified benchmarks used in determining the variable rate of interest: 1 month USD LIBOR Federal Funds 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. The reference entity rating represents the creditworthiness of the underlying issuer. As the credit rating declines, the likelihood of payment by the fund increases. 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

CNY Chinese Yuan Renminbi

EUR Euro

GBP British Pound

HKD Hong Kong Dollar

IDR Indonesian Rupiah

INR Indian Rupee

JPY Japanese Yen

KRW South Korean Won

MXN Mexican Peso

NOK Norwegian Krone

NZD New Zealand Dollar

RUB Russian Ruble

SEK Swedish Krona

USD U.S. Dollar

MassMutual Diversified Value Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.3%
COMMON STOCK — 97.4%
Basic Materials — 3.7%
Chemicals — 2.1%
Celanese Corp.		4,000	$	672,240
CF Industries Holdings, Inc.		37,344		2,643,208
DuPont de Nemours, Inc.		12,900		1,042,062
Eastman Chemical Co.		4,600		556,186
FMC Corp.		3,200		351,648
International Flavors & Fragrances, Inc.		16,761		2,525,045
The Mosaic Co.		12,900		506,841
				8,297,230
Forest Products & Paper — 0.8%
International Paper Co.		66,052		3,103,123
Iron & Steel — 0.5%
Nucor Corp.		10,200		1,164,330
Reliance Steel & Aluminum Co.		2,200		356,884
Steel Dynamics, Inc.		7,000		434,490
				1,955,704
Mining — 0.3%
Newmont Corp.		19,800		1,227,996
				14,584,053
Communications — 5.6%
Advertising — 0.2%
The Interpublic Group of Cos., Inc.		7,500		280,875
Omnicom Group, Inc.		7,200		527,544
				808,419
Internet — 0.5%
eBay, Inc.		23,300		1,549,450
NortonLifeLock, Inc.		13,900		361,122
				1,910,572
Media — 3.1%
Comcast Corp. Class A		191,131		9,619,623
Fox Corp. Class A		11,400		420,660
The Walt Disney Co. (a)		13,536		2,096,591
				12,136,874

MassMutual Diversified Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Telecommunications — 1.8%
Cisco Systems, Inc.		110,700	$	7,015,059
				21,870,924
Consumer, Cyclical — 7.9%
Apparel — 0.2%
Capri Holdings Ltd. (a)		3,800		246,658
PVH Corp.		1,700		181,305
Skechers U.S.A., Inc. Class A (a)		3,200		138,880
Tapestry, Inc.		3,400		138,040
				704,883
Auto Manufacturers — 1.2%
Ford Motor Co.		131,000		2,720,870
General Motors Co. (a)		37,600		2,204,488
				4,925,358
Auto Parts & Equipment — 0.1%
BorgWarner, Inc.		3,000		135,210
Lear Corp.		1,600		292,720
				427,930
Distribution & Wholesale — 0.2%
LKQ Corp.		10,300		618,309
Home Builders — 0.9%
D.R. Horton, Inc.		12,400		1,344,780
Lennar Corp. Class A		9,300		1,080,288
NVR, Inc. (a)		90		531,798
PulteGroup, Inc.		9,100		520,156
Toll Brothers, Inc.		3,000		217,170
				3,694,192
Home Furnishing — 0.2%
Tempur Sealy International, Inc.		5,200		244,556
Whirlpool Corp.		2,100		492,786
				737,342
Leisure Time — 0.1%
Brunswick Corp.		2,700		271,971
Lodging — 0.4%
Las Vegas Sands Corp. (a)		40,125		1,510,305
Retail — 4.5%
Advance Auto Parts, Inc.		2,300		551,724
AutoNation, Inc. (a)		3,000		350,550
AutoZone, Inc. (a)		700		1,467,473
BJ's Wholesale Club Holdings, Inc. (a)		3,700		247,789
CarMax, Inc. (a)		4,400		573,012
Dick's Sporting Goods, Inc. (b)		1,600		183,984
Genuine Parts Co.		4,900		686,980
Lowe's Cos., Inc.		24,800		6,410,304
O'Reilly Automotive, Inc. (a)		2,400		1,694,952

MassMutual Diversified Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Penske Automotive Group, Inc.		2,200	$	235,884
Target Corp.		16,900		3,911,336
Walgreens Boots Alliance, Inc.		22,700		1,184,032
Williams-Sonoma, Inc.		2,000		338,260
				17,836,280
Textiles — 0.1%
Mohawk Industries, Inc. (a)		2,400		437,232
				31,163,802
Consumer, Non-cyclical — 24.6%
Agriculture — 2.5%
Altria Group, Inc.		48,700		2,307,893
Archer-Daniels-Midland Co.		18,800		1,270,692
Bunge Ltd.		4,700		438,792
Darling Ingredients, Inc. (a)		2,000		138,580
Philip Morris International, Inc.		61,116		5,806,020
				9,961,977
Beverages — 0.0%
Molson Coors Beverage Co. Class B		2,500		115,875
Biotechnology — 1.4%
Bio-Rad Laboratories, Inc. Class A (a)		900		680,013
Biogen, Inc. (a)		3,500		839,720
Gilead Sciences, Inc.		31,200		2,265,432
Regeneron Pharmaceuticals, Inc. (a)		2,800		1,768,256
				5,553,421
Commercial Services — 0.6%
AMERCO		700		508,361
Booz Allen Hamilton Holding Corp.		3,400		288,286
Quanta Services, Inc.		3,700		424,242
Service Corp. International		5,900		418,841
United Rentals, Inc. (a)		1,900		631,351
				2,271,081
Food — 2.9%
Conagra Brands, Inc.		39,488		1,348,515
General Mills, Inc.		15,900		1,071,342
The J.M. Smucker Co.		2,900		393,878
Kellogg Co.		8,500		547,570
The Kraft Heinz Co.		32,200		1,155,980
The Kroger Co.		19,600		887,096
Mondelez International, Inc. Class A		16,800		1,114,008
Tyson Foods, Inc. Class A		53,719		4,682,148
				11,200,537
Health Care – Products — 0.6%
Henry Schein, Inc. (a)		3,800		294,614
Hologic, Inc. (a)		6,200		474,672
Medtronic PLC		16,929		1,751,305
				2,520,591

MassMutual Diversified Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Health Care – Services — 4.6%
Anthem, Inc.		24,561	$	11,385,006
Centene Corp. (a)		14,500		1,194,800
DaVita, Inc. (a)		3,900		443,664
HCA Healthcare, Inc.		11,500		2,954,580
Laboratory Corp. of America Holdings (a)		3,300		1,036,893
Quest Diagnostics, Inc.		4,600		795,846
Universal Health Services, Inc. Class B		2,700		350,082
				18,160,871
Household Products & Wares — 1.0%
Kimberly-Clark Corp.		26,597		3,801,243
Pharmaceuticals — 11.0%
AbbVie, Inc.		71,813		9,723,480
AmerisourceBergen Corp.		6,900		916,941
Becton Dickinson and Co.		16,793		4,223,104
Cigna Corp.		9,100		2,089,633
CVS Health Corp.		61,303		6,324,018
Johnson & Johnson		65,300		11,170,871
McKesson Corp.		5,300		1,317,421
Merck & Co., Inc.		66,700		5,111,888
Sanofi Sponsored ADR		51,950		2,602,695
				43,480,051
				97,065,647
Energy — 5.4%
Energy – Alternate Sources — 0.1%
First Solar, Inc. (a)		2,900		252,764
Oil & Gas — 4.6%
APA Corp.		9,000		242,010
EOG Resources, Inc.		36,541		3,245,937
Exxon Mobil Corp.		111,100		6,798,209
Marathon Oil Corp.		19,380		318,219
Ovintiv, Inc.		6,500		219,050
TotalEnergies SE		99,027		5,029,657
TotalEnergies SE Sponsored ADR		32,209		1,593,057
Valero Energy Corp.		10,800		811,188
				18,257,327
Pipelines — 0.7%
Kinder Morgan, Inc.		59,500		943,670
ONEOK, Inc.		11,100		652,236
The Williams Cos., Inc.		41,000		1,067,640
				2,663,546
				21,173,637
Financial — 26.6%
Banks — 14.4%
Bank of America Corp.		222,900		9,916,821
The Bank of New York Mellon Corp.		23,400		1,359,072

MassMutual Diversified Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Citizens Financial Group, Inc.		11,300	$	533,925
Comerica, Inc.		3,700		321,900
Commerce Bancshares, Inc.		3,255		223,749
Cullen/Frost Bankers, Inc.		1,400		176,498
East West Bancorp, Inc.		3,800		298,984
Fifth Third Bancorp		107,438		4,678,925
First Horizon Corp.		14,300		233,519
The Goldman Sachs Group, Inc.		15,171		5,803,666
Huntington Bancshares, Inc.		140,860		2,172,061
JP Morgan Chase & Co.		72,500		11,480,375
KeyCorp.		25,800		596,754
M&T Bank Corp.		3,300		506,814
Northern Trust Corp.		5,400		645,894
The PNC Financial Services Group, Inc.		11,200		2,245,824
Regions Financial Corp.		25,300		551,540
State Street Corp.		19,000		1,767,000
Truist Financial Corp.		35,300		2,066,815
US Bancorp		39,400		2,213,098
Wells Fargo & Co.		175,623		8,426,391
Western Alliance Bancorp		2,600		279,890
Zions Bancorp NA		4,400		277,904
				56,777,419
Diversified Financial Services — 2.7%
Ally Financial, Inc.		9,900		471,339
American Express Co.		20,500		3,353,800
Ameriprise Financial, Inc.		3,100		935,146
Capital One Financial Corp.		12,100		1,755,589
Credit Acceptance Corp. (a)		400		275,072
Discover Financial Services		7,700		889,812
OneMain Holdings, Inc.		3,300		165,132
Raymond James Financial, Inc.		5,250		527,100
SEI Investments Co.		3,900		237,666
Synchrony Financial		15,400		714,406
T. Rowe Price Group, Inc.		5,900		1,160,176
				10,485,238
Insurance — 8.0%
Aflac, Inc.		18,500		1,080,215
Alleghany Corp. (a)		400		267,036
The Allstate Corp.		7,900		929,435
American Financial Group, Inc.		2,300		315,836
American International Group, Inc.		88,488		5,031,428
Arch Capital Group Ltd. (a)		10,600		471,170
Assurant, Inc.		1,600		249,376
Chubb Ltd.		28,963		5,598,838
Cincinnati Financial Corp.		4,300		489,899
Equitable Holdings, Inc.		11,700		383,643
Everest Re Group Ltd.		1,300		356,096
Fidelity National Financial, Inc.		7,500		391,350
First American Financial Corp.		3,000		234,690
Globe Life, Inc.		2,500		234,300
The Hartford Financial Services Group, Inc.		9,500		655,880
Lincoln National Corp.		5,100		348,126
Loews Corp.		51,753		2,989,253
Markel Corp. (a)		390		481,260
MetLife, Inc.		66,958		4,184,205

MassMutual Diversified Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Old Republic International Corp.		5,400	$	132,732
Principal Financial Group, Inc.		7,200		520,776
The Progressive Corp.		15,500		1,591,075
Prudential Financial, Inc.		10,400		1,125,696
RenaissanceRe Holdings Ltd.		1,200		203,196
The Travelers Cos., Inc.		12,300		1,924,089
Voya Financial, Inc.		3,600		238,716
W.R. Berkley Corp.		4,700		387,233
Willis Towers Watson PLC		3,500		831,215
				31,646,764
Real Estate — 0.2%
CBRE Group, Inc. Class A (a)		4,100		444,891
Jones Lang LaSalle, Inc. (a)		1,700		457,878
				902,769
Real Estate Investment Trusts (REITS) — 1.3%
Equity Residential		31,183		2,822,062
Weyerhaeuser Co.		51,555		2,123,035
				4,945,097
				104,757,287
Industrial — 11.0%
Aerospace & Defense — 3.1%
The Boeing Co. (a)		8,153		1,641,362
General Dynamics Corp.		9,700		2,022,159
L3 Harris Technologies, Inc.		21,482		4,580,822
Lockheed Martin Corp.		6,800		2,416,788
Northrop Grumman Corp.		4,300		1,664,401
				12,325,532
Building Materials — 0.4%
Fortune Brands Home & Security, Inc.		4,700		502,430
Masco Corp.		8,900		624,958
Owens Corning		3,700		334,850
				1,462,238
Electronics — 0.2%
Arrow Electronics, Inc. (a)		2,600		349,102
Jabil, Inc.		5,100		358,785
Sensata Technologies Holding PLC (a)		3,800		234,422
				942,309
Hand & Machine Tools — 0.1%
Snap-on, Inc.		1,900		409,222
Machinery – Construction & Mining — 0.0%
Oshkosh Corp.		1,700		191,607
Machinery – Diversified — 1.1%
Deere & Co.		8,200		2,811,698
Dover Corp.		4,900		889,840

MassMutual Diversified Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Westinghouse Air Brake Technologies Corp.		6,400	$	589,504
				4,291,042
Miscellaneous - Manufacturing — 2.8%
3M Co.		19,500		3,463,785
General Electric Co.		60,059		5,673,774
Parker-Hannifin Corp.		3,500		1,113,420
Textron, Inc.		7,700		594,440
				10,845,419
Packaging & Containers — 0.5%
Amcor PLC		52,800		634,128
Berry Global Group, Inc. (a)		3,000		221,340
Crown Holdings, Inc.		4,600		508,852
Packaging Corp. of America		3,200		435,680
Sealed Air Corp.		5,200		350,844
				2,150,844
Shipbuilding — 0.1%
Huntington Ingalls Industries, Inc.		1,100		205,414
Transportation — 2.7%
C.H. Robinson Worldwide, Inc.		3,300		355,179
Expeditors International of Washington, Inc.		4,300		577,447
Knight-Swift Transportation Holdings, Inc.		4,500		274,230
United Parcel Service, Inc. Class B		44,251		9,484,759
				10,691,615
				43,515,242
Technology — 6.7%
Computers — 1.4%
Genpact Ltd.		6,300		334,404
Hewlett Packard Enterprise Co.		43,700		689,149
HP, Inc.		43,600		1,642,412
International Business Machines Corp.		22,300		2,980,618
				5,646,583
Semiconductors — 1.6%
QUALCOMM, Inc.		34,916		6,385,089
Software — 3.7%
Citrix Systems, Inc.		12,121		1,146,525
Microsoft Corp.		14,173		4,766,663
Oracle Corp.		98,700		8,607,627
				14,520,815
				26,552,487
Utilities — 5.9%
Electric — 5.4%
Alliant Energy Corp.		6,500		399,555
Dominion Energy, Inc.		21,300		1,673,328
Edison International		9,400		641,550

MassMutual Diversified Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Entergy Corp.		5,200	$	585,780
Evergy, Inc.		6,000		411,660
Eversource Energy		8,500		773,330
Exelon Corp.		33,000		1,906,080
FirstEnergy Corp.		14,400		598,896
NRG Energy, Inc.		6,000		258,480
PPL Corp.		18,700		562,122
Public Service Enterprise Group, Inc.		17,800		1,187,794
Sempra Energy		35,515		4,697,924
The Southern Co.		108,885		7,467,334
Vistra Corp.		12,000		273,240
				21,437,073
Gas — 0.4%
NiSource, Inc.		43,061		1,188,914
UGI Corp.		7,000		321,370
				1,510,284
Water — 0.1%
Essential Utilities, Inc.		5,600		300,664
				23,248,021
TOTAL COMMON STOCK (Cost $295,109,856)				383,931,100
PREFERRED STOCK — 0.9%
Consumer, Cyclical — 0.4%
Auto Manufacturers — 0.4%
Volkswagen AG 2.560%		8,172		1,651,475
Consumer, Non-cyclical — 0.1%
Pharmaceuticals — 0.1%
Becton Dickinson and Co. Convertible 6.000% (b)		9,376		494,584
Utilities — 0.4%
Electric — 0.2%
The Southern Co. Convertible		14,685		789,319
Gas — 0.2%
NiSource, Inc. 7.750%		4,958		555,246
				1,344,565
TOTAL PREFERRED STOCK (Cost $3,650,798)				3,490,624
TOTAL EQUITIES (Cost $298,760,654)				387,421,724
MUTUAL FUNDS — 0.9%
Diversified Financial Services — 0.9%
iShares Russell 1000 Value ETF		18,200		3,056,326

MassMutual Diversified Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
State Street Navigator Securities Lending Government Money Market Portfolio (c)		671,721	$	671,721
				3,728,047
TOTAL MUTUAL FUNDS (Cost $3,665,100)				3,728,047
TOTAL LONG-TERM INVESTMENTS (Cost $302,425,754)				391,149,771
SHORT-TERM INVESTMENTS — 1.9%
Mutual Fund — 0.0%
T. Rowe Price Government Reserve Investment Fund		104		104
	Principal Amount
Repurchase Agreement — 1.9%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (d)	$	7,458,135		7,458,135
TOTAL SHORT-TERM INVESTMENTS (Cost $7,458,239)				7,458,239
TOTAL INVESTMENTS — 101.1% (Cost $309,883,993) (e)				398,608,010
Other Assets/(Liabilities) — (1.1)%				(4,469,610)
NET ASSETS — 100.0%			$	394,138,400

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 December 31, 2021, was $671,352 or 0.17% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $15,184 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 $7,458,135. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $7,607,369.

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

MassMutual Fundamental Value Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.1%
COMMON STOCK — 99.1%
Basic Materials — 5.6%
Chemicals — 5.4%
Air Products & Chemicals, Inc.		21,739	$	6,614,309
Axalta Coating Systems Ltd. (a)		161,623		5,352,953
DuPont de Nemours, Inc.		132,055		10,667,403
Element Solutions, Inc.		139,260		3,381,233
International Flavors & Fragrances, Inc.		46,203		6,960,482
				32,976,380
Mining — 0.2%
Newmont Corp.		25,670		1,592,053
				34,568,433
Communications — 5.7%
Internet — 2.1%
Alphabet, Inc. Class A (a)		2,466		7,144,101
Meta Platforms, Inc. Class A (a)		11,906		4,004,583
NortonLifeLock, Inc.		73,034		1,897,423
				13,046,107
Media — 1.6%
Altice USA, Inc. Class A (a)		81,482		1,318,379
Charter Communications, Inc. Class A (a)		2,689		1,753,147
Comcast Corp. Class A		132,503		6,668,876
				9,740,402
Telecommunications — 2.0%
Cisco Systems, Inc.		117,820		7,466,254
T-Mobile US, Inc. (a)		38,051		4,413,155
				11,879,409
				34,665,918
Consumer, Cyclical — 9.3%
Apparel — 0.6%
Ralph Lauren Corp.		18,083		2,149,345
Tapestry, Inc.		39,039		1,584,984
				3,734,329
Distribution & Wholesale — 0.4%
LKQ Corp.		46,186		2,772,546

MassMutual Fundamental Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Entertainment — 0.9%
Marriott Vacations Worldwide Corp.		16,002	$	2,704,018
SeaWorld Entertainment, Inc. (a)		38,858		2,520,330
				5,224,348
Food Services — 0.3%
Aramark		43,652		1,608,576
Home Builders — 0.7%
Lennar Corp. Class A		36,540		4,244,486
Home Furnishing — 0.6%
Sony Group Corp. Sponsored ADR (b)		30,659		3,875,298
Leisure Time — 0.3%
Harley-Davidson, Inc.		25,795		972,213
Polaris, Inc.		8,881		976,111
				1,948,324
Lodging — 0.9%
Las Vegas Sands Corp. (a)		63,281		2,381,897
MGM Resorts International		64,976		2,916,123
				5,298,020
Retail — 4.2%
Advance Auto Parts, Inc.		19,555		4,690,853
AutoZone, Inc. (a)		3,615		7,578,450
Kohl's Corp.		26,549		1,311,255
Lithia Motors, Inc.		6,329		1,879,397
Lowe's Cos., Inc.		24,572		6,351,371
Restaurant Brands International, Inc.		14,311		868,391
The TJX Cos., Inc.		39,045		2,964,296
				25,644,013
Textiles — 0.4%
Mohawk Industries, Inc. (a)		14,853		2,705,919
				57,055,859
Consumer, Non-cyclical — 24.8%
Agriculture — 0.9%
Altria Group, Inc.		42,923		2,034,121
Philip Morris International, Inc.		37,384		3,551,480
				5,585,601
Beverages — 2.7%
Coca-Cola Europacific Partners PLC		180,290		10,083,620
Keurig Dr Pepper, Inc.		110,712		4,080,844
Molson Coors Beverage Co. Class B		44,484		2,061,833
				16,226,297
Biotechnology — 0.8%
Corteva, Inc.		95,874		4,532,923

MassMutual Fundamental Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Commercial Services — 1.6%
FleetCor Technologies, Inc. (a)		9,887	$	2,213,106
Global Payments, Inc.		21,835		2,951,656
PROG Holdings, Inc. (a)		27,793		1,253,742
United Rentals, Inc. (a)		9,614		3,194,636
				9,613,140
Cosmetics & Personal Care — 0.7%
The Procter & Gamble Co.		26,935		4,406,027
Food — 0.3%
US Foods Holding Corp. (a)		57,708		2,009,970
Health Care – Products — 2.2%
Avantor, Inc. (a)		90,359		3,807,728
Envista Holdings Corp. (a)		36,184		1,630,451
Hologic, Inc. (a)		22,409		1,715,633
LivaNova PLC (a)		18,468		1,614,657
Medtronic PLC		47,106		4,873,116
				13,641,585
Health Care – Services — 4.2%
Anthem, Inc.		6,468		2,998,177
Centene Corp. (a)		55,088		4,539,251
Humana, Inc.		2,763		1,281,645
ICON PLC (a)		8,195		2,537,992
UnitedHealth Group, Inc.		28,846		14,484,730
				25,841,795
Pharmaceuticals — 11.4%
AbbVie, Inc.		27,100		3,669,340
AmerisourceBergen Corp.		19,577		2,601,588
Becton Dickinson and Co.		11,410		2,869,387
Bristol-Myers Squibb Co.		51,940		3,238,459
Cigna Corp.		49,049		11,263,122
CVS Health Corp.		114,539		11,815,843
Johnson & Johnson		74,974		12,825,802
McKesson Corp.		11,804		2,934,120
Merck & Co., Inc.		108,879		8,344,487
Novartis AG Sponsored ADR		30,539		2,671,246
Perrigo Co. PLC		100,200		3,897,780
Sanofi Sponsored ADR		73,982		3,706,498
				69,837,672
				151,695,010
Energy — 7.2%
Oil & Gas — 6.8%
Canadian Natural Resources Ltd. (b)		69,731		2,946,135
Cenovus Energy, Inc.		109,369		1,343,051
ConocoPhillips		102,424		7,392,964
EOG Resources, Inc.		31,353		2,785,087
Hess Corp.		79,519		5,886,792
HollyFrontier Corp.		40,343		1,322,444
Marathon Petroleum Corp.		70,904		4,537,147

MassMutual Fundamental Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Phillips 66		83,028	$	6,016,209
Pioneer Natural Resources Co.		36,239		6,591,149
Valero Energy Corp.		32,849		2,467,288
				41,288,266
Oil & Gas Services — 0.4%
Schlumberger NV		88,319		2,645,154
				43,933,420
Financial — 21.4%
Banks — 10.7%
Bank of America Corp.		114,894		5,111,634
Citigroup, Inc.		53,938		3,257,316
Fifth Third Bancorp		52,766		2,297,959
The Goldman Sachs Group, Inc.		16,282		6,228,679
JP Morgan Chase & Co.		104,406		16,532,690
M&T Bank Corp.		16,205		2,488,764
Northern Trust Corp.		47,496		5,680,997
Truist Financial Corp.		67,198		3,934,443
US Bancorp		113,924		6,399,111
Wells Fargo & Co.		277,485		13,313,730
				65,245,323
Diversified Financial Services — 3.5%
AerCap Holdings NV (a)		46,853		3,065,123
American Express Co.		33,487		5,478,473
Capital One Financial Corp.		27,981		4,059,764
The Charles Schwab Corp.		53,072		4,463,355
Discover Financial Services		13,918		1,608,364
SLM Corp.		136,262		2,680,274
				21,355,353
Insurance — 5.6%
The Allstate Corp.		39,802		4,682,705
American International Group, Inc.		72,942		4,147,482
Axis Capital Holdings Ltd.		21,781		1,186,411
Berkshire Hathaway, Inc. Class B (a)		28,975		8,663,525
Chubb Ltd.		47,972		9,273,467
Everest Re Group Ltd.		7,972		2,183,690
Fidelity National Financial, Inc.		34,603		1,805,585
Willis Towers Watson PLC		10,710		2,543,518
				34,486,383
Real Estate — 0.3%
The Howard Hughes Corp. (a)		20,738		2,110,714
Real Estate Investment Trusts (REITS) — 1.3%
American Campus Communities, Inc.		30,651		1,755,996
Corporate Office Properties Trust		96,596		2,701,790
MGM Growth Properties LLC Class A		39,483		1,612,880

MassMutual Fundamental Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
VICI Properties, Inc. (b)		53,135	$	1,599,895
				7,670,561
				130,868,334
Industrial — 12.2%
Aerospace & Defense — 3.1%
BWX Technologies, Inc.		41,360		1,980,317
General Dynamics Corp.		35,813		7,465,936
Howmet Aerospace, Inc.		93,955		2,990,588
Raytheon Technologies Corp.		78,035		6,715,692
				19,152,533
Building Materials — 0.7%
CRH PLC Sponsored ADR		38,105		2,011,944
MDU Resources Group, Inc.		15,497		477,927
Owens Corning		16,758		1,516,599
				4,006,470
Electrical Components & Equipment — 0.2%
Emerson Electric Co.		16,001		1,487,613
Electronics — 0.1%
Allegion PLC		6,996		926,550
Engineering & Construction — 0.8%
AECOM (a)		38,608		2,986,329
Jacobs Engineering Group, Inc.		11,918		1,659,343
				4,645,672
Hand & Machine Tools — 0.9%
Stanley Black & Decker, Inc.		28,340		5,345,491
Machinery – Construction & Mining — 1.0%
Caterpillar, Inc.		11,310		2,338,230
Vertiv Holdings Co.		160,926		4,018,322
				6,356,552
Machinery – Diversified — 3.2%
Deere & Co.		29,535		10,127,256
Dover Corp.		10,021		1,819,814
The Middleby Corp. (a)		6,586		1,295,861
Otis Worldwide Corp.		32,987		2,872,178
Westinghouse Air Brake Technologies Corp.		41,293		3,803,498
				19,918,607
Miscellaneous - Manufacturing — 0.8%
Eaton Corp. PLC		26,890		4,647,130
Transportation — 1.4%
Canadian National Railway Co.		21,713		2,667,659
J.B. Hunt Transport Services, Inc.		14,833		3,031,865

MassMutual Fundamental Value Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Union Pacific Corp.		11,204	$	2,822,624
				8,522,148
				75,008,766
Technology — 9.2%
Computers — 1.5%
Cognizant Technology Solutions Corp. Class A		88,824		7,880,465
NetApp, Inc.		14,231		1,309,110
				9,189,575
Semiconductors — 5.3%
Applied Materials, Inc.		25,273		3,976,959
Broadcom, Inc.		5,568		3,705,003
KLA Corp.		4,535		1,950,549
Lam Research Corp.		2,834		2,038,071
Microchip Technology, Inc.		30,949		2,694,420
Micron Technology, Inc.		57,518		5,357,802
NXP Semiconductor NV		8,480		1,931,574
Qorvo, Inc. (a)		19,271		3,013,792
QUALCOMM, Inc.		44,239		8,089,986
				32,758,156
Software — 2.4%
Activision Blizzard, Inc.		30,215		2,010,204
Fidelity National Information Services, Inc.		41,483		4,527,869
Oracle Corp.		63,008		5,494,928
SS&C Technologies Holdings, Inc		32,035		2,626,229
				14,659,230
				56,606,961
Utilities — 3.7%
Electric — 3.7%
CenterPoint Energy, Inc.		276,797		7,725,404
Dominion Energy, Inc.		38,482		3,023,146
Edison International		14,218		970,379
Entergy Corp.		28,076		3,162,761
Exelon Corp.		109,166		6,305,428
Pinnacle West Capital Corp.		23,937		1,689,713
				22,876,831
				22,876,831
TOTAL COMMON STOCK (Cost $449,441,598)				607,279,532
TOTAL EQUITIES (Cost $449,441,598)				607,279,532
TOTAL LONG-TERM INVESTMENTS (Cost $449,441,598)				607,279,532

MassMutual Fundamental Value Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
SHORT-TERM INVESTMENTS — 1.4%
Repurchase Agreement — 1.4%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (c)	$	8,606,935	$	8,606,935
TOTAL SHORT-TERM INVESTMENTS (Cost $8,606,935)				8,606,935
TOTAL INVESTMENTS — 100.5% (Cost $458,048,533) (d)				615,886,467
Other Assets/(Liabilities) — (0.5)%				(3,051,327)
NET ASSETS — 100.0%			$	612,835,140

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 December 31, 2021, was $4,571,501 or 0.75% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $4,671,362 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 $8,606,935. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity dates ranging from 7/31/28, and an aggregate market value, including accrued interest, of $8,779,238.

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

MM S&P 500 Index Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.9%
COMMON STOCK — 99.9%
Basic Materials — 2.1%
Chemicals — 1.7%
Air Products & Chemicals, Inc.		19,831	$	6,033,780
Albemarle Corp.		10,440		2,440,559
Celanese Corp.		9,880		1,660,433
CF Industries Holdings, Inc.		18,960		1,341,989
Dow, Inc.		65,862		3,735,693
DuPont de Nemours, Inc.		46,726		3,774,526
Eastman Chemical Co.		12,051		1,457,086
Ecolab, Inc.		22,351		5,243,321
FMC Corp.		11,266		1,238,021
International Flavors & Fragrances, Inc.		22,965		3,459,677
Linde PLC		45,941		15,915,341
LyondellBasell Industries NV Class A		23,750		2,190,462
The Mosaic Co.		33,403		1,312,404
PPG Industries, Inc.		21,229		3,660,729
The Sherwin-Williams Co.		21,576		7,598,204
				61,062,225
Forest Products & Paper — 0.0%
International Paper Co.		34,644		1,627,575
Iron & Steel — 0.1%
Nucor Corp.		25,737		2,937,878
Mining — 0.3%
Freeport-McMoRan, Inc.		132,131		5,513,827
Newmont Corp.		71,456		4,431,701
				9,945,528
				75,573,206
Communications — 15.1%
Advertising — 0.1%
The Interpublic Group of Cos., Inc.		35,464		1,328,127
Omnicom Group, Inc.		19,386		1,420,412
				2,748,539
Internet — 11.2%
Alphabet, Inc. Class A (a)		26,966		78,121,581
Alphabet, Inc. Class C (a)		25,062		72,519,153
Amazon.com, Inc. (a)		39,106		130,392,700
Booking Holdings, Inc. (a)		3,678		8,824,368
CDW Corp.		12,242		2,506,917
eBay, Inc.		56,470		3,755,255

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

	Number of Shares		Value
Etsy, Inc. (a)		11,371	$	2,489,567
Expedia Group, Inc. (a)		13,185		2,382,793
F5, Inc. (a)		5,332		1,304,794
Match Group, Inc. (a)		25,545		3,378,326
Meta Platforms, Inc. Class A (a)		212,129		71,349,589
Netflix, Inc. (a)		39,694		23,913,253
NortonLifeLock, Inc.		51,719		1,343,660
Twitter, Inc. (a)		71,555		3,092,607
VeriSign, Inc. (a)		8,608		2,184,882
				407,559,445
Media — 1.7%
Charter Communications, Inc. Class A (a)		11,077		7,221,872
Comcast Corp. Class A		408,666		20,568,160
Discovery, Inc. Class A (a)		15,277		359,620
Discovery, Inc. Class C (a)		27,104		620,681
DISH Network Corp. Class A (a)		21,937		711,636
FactSet Research Systems, Inc.		3,377		1,641,256
Fox Corp. Class A		28,043		1,034,787
Fox Corp. Class B		13,434		460,383
News Corp. Class A		34,116		761,128
News Corp. Class B		11,666		262,485
ViacomCBS, Inc. Class B		54,061		1,631,561
The Walt Disney Co. (a)		162,958		25,240,565
				60,514,134
Telecommunications — 2.1%
Arista Networks, Inc. (a)		20,048		2,881,900
AT&T, Inc.		640,090		15,746,214
Cisco Systems, Inc.		378,258		23,970,210
Corning, Inc.		69,527		2,588,490
Juniper Networks, Inc.		28,437		1,015,485
Lumen Technologies, Inc.		83,264		1,044,963
Motorola Solutions, Inc.		15,159		4,118,700
T-Mobile US, Inc. (a)		52,579		6,098,112
Verizon Communications, Inc.		371,333		19,294,463
				76,758,537
				547,580,655
Consumer, Cyclical — 10.2%
Airlines — 0.2%
Alaska Air Group, Inc. (a)		10,880		566,848
American Airlines Group, Inc. (a)		58,397		1,048,810
Delta Air Lines, Inc. (a)		57,535		2,248,468
Southwest Airlines Co. (a)		53,274		2,282,258
United Airlines Holdings, Inc. (a)		29,106		1,274,261
				7,420,645
Apparel — 0.7%
NIKE, Inc. Class B		114,410		19,068,715
PVH Corp.		6,511		694,398
Ralph Lauren Corp.		4,303		511,454
Tapestry, Inc.		25,201		1,023,161
Under Armour, Inc. Class A (a)		17,298		366,545

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

	Number of Shares		Value
Under Armour, Inc. Class C (a)		19,459	$	351,040
VF Corp.		29,450		2,156,329
				24,171,642
Auto Manufacturers — 2.7%
Cummins, Inc.		12,768		2,785,212
Ford Motor Co.		350,922		7,288,650
General Motors Co. (a)		130,448		7,648,166
PACCAR, Inc.		31,186		2,752,476
Tesla, Inc. (a)		72,919		77,059,341
				97,533,845
Auto Parts & Equipment — 0.2%
Aptiv PLC (a)		24,384		4,022,141
BorgWarner, Inc.		21,439		966,256
				4,988,397
Distribution & Wholesale — 0.3%
Copart, Inc. (a)		19,285		2,923,992
Fastenal Co.		51,917		3,325,803
LKQ Corp.		24,430		1,466,533
Pool Corp.		3,594		2,034,204
W.W. Grainger, Inc.		3,889		2,015,435
				11,765,967
Entertainment — 0.1%
Caesars Entertainment, Inc. (a)		19,144		1,790,538
Live Nation Entertainment, Inc. (a)		12,190		1,459,021
Penn National Gaming, Inc. (a)		14,603		757,166
				4,006,725
Home Builders — 0.3%
D.R. Horton, Inc.		29,409		3,189,406
Lennar Corp. Class A		24,537		2,850,218
NVR, Inc. (a)		295		1,743,117
PulteGroup, Inc.		22,528		1,287,700
				9,070,441
Home Furnishing — 0.0%
Whirlpool Corp.		5,553		1,303,067
Housewares — 0.0%
Newell Brands, Inc.		34,574		755,096
Leisure Time — 0.1%
Carnival Corp. (a) (b)		71,666		1,441,920
Norwegian Cruise Line Holdings Ltd. (a) (b)		32,810		680,479
Royal Caribbean Cruises Ltd. (a)		20,083		1,544,383
				3,666,782
Lodging — 0.3%
Hilton Worldwide Holdings, Inc. (a)		25,004		3,900,374
Las Vegas Sands Corp. (a)		30,944		1,164,732
Marriott International, Inc. Class A (a)		24,570		4,059,947

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

	Number of Shares		Value
MGM Resorts International		34,730	$	1,558,682
Wynn Resorts Ltd. (a)		9,402		799,546
				11,483,281
Retail — 5.3%
Advance Auto Parts, Inc.		5,634		1,351,484
AutoZone, Inc. (a)		1,889		3,960,081
Bath & Body Works, Inc.		23,944		1,671,052
Best Buy Co., Inc.		19,959		2,027,834
CarMax, Inc. (a)		14,619		1,903,832
Chipotle Mexican Grill, Inc. (a)		2,512		4,391,604
Costco Wholesale Corp.		39,567		22,462,186
Darden Restaurants, Inc.		11,783		1,774,991
Dollar General Corp.		20,966		4,944,412
Dollar Tree, Inc. (a)		20,294		2,851,713
Domino's Pizza, Inc.		3,306		1,865,675
The Gap, Inc.		20,168		355,965
Genuine Parts Co.		12,636		1,771,567
The Home Depot, Inc.		94,557		39,242,101
Lowe's Cos., Inc.		61,981		16,020,849
McDonald's Corp.		66,956		17,948,895
O'Reilly Automotive, Inc. (a)		6,070		4,286,816
Ross Stores, Inc.		31,762		3,629,761
Starbucks Corp.		105,735		12,367,823
Target Corp.		43,643		10,100,736
The TJX Cos., Inc.		108,100		8,206,952
Tractor Supply Co.		10,254		2,446,604
Ulta Beauty, Inc. (a)		4,888		2,015,518
Walgreens Boots Alliance, Inc.		64,552		3,367,032
Walmart, Inc.		127,398		18,433,217
Yum! Brands, Inc.		26,132		3,628,690
				193,027,390
Textiles — 0.0%
Mohawk Industries, Inc. (a)		4,913		895,050
Toys, Games & Hobbies — 0.0%
Hasbro, Inc.		11,368		1,157,035
				371,245,363
Consumer, Non-cyclical — 19.8%
Agriculture — 0.7%
Altria Group, Inc.		165,072		7,822,762
Archer-Daniels-Midland Co.		50,314		3,400,723
Philip Morris International, Inc.		139,372		13,240,340
				24,463,825
Beverages — 1.4%
Brown-Forman Corp. Class B		16,113		1,173,993
The Coca-Cola Co.		348,312		20,623,554
Constellation Brands, Inc. Class A		14,783		3,710,089
Molson Coors Beverage Co. Class B		16,755		776,594
Monster Beverage Corp. (a)		33,948		3,260,366

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

	Number of Shares		Value
PepsiCo, Inc.		123,874	$	21,518,153
				51,062,749
Biotechnology — 1.4%
Amgen, Inc.		50,498		11,360,535
Bio-Rad Laboratories, Inc. Class A (a)		1,923		1,452,961
Biogen, Inc. (a)		13,253		3,179,660
Corteva, Inc.		65,789		3,110,504
Gilead Sciences, Inc.		112,581		8,174,506
Illumina, Inc. (a)		14,002		5,326,921
Incyte Corp. (a)		16,612		1,219,321
Moderna, Inc. (a)		31,610		8,028,308
Regeneron Pharmaceuticals, Inc. (a)		9,463		5,976,073
Vertex Pharmaceuticals, Inc. (a)		22,773		5,000,951
				52,829,740
Commercial Services — 2.1%
Automatic Data Processing, Inc.		37,717		9,300,258
Cintas Corp.		7,855		3,481,100
Equifax, Inc.		10,902		3,191,997
FleetCor Technologies, Inc. (a)		7,349		1,645,000
Gartner, Inc. (a)		7,406		2,475,974
Global Payments, Inc.		26,174		3,538,201
IHS Markit Ltd.		35,882		4,769,436
MarketAxess Holdings, Inc.		3,371		1,386,391
Moody's Corp.		14,437		5,638,804
Nielsen Holdings PLC		32,744		671,579
PayPal Holdings, Inc. (a)		105,330		19,863,131
Quanta Services, Inc.		12,818		1,469,712
Robert Half International, Inc.		10,135		1,130,255
Rollins, Inc.		19,665		672,740
S&P Global, Inc.		21,643		10,213,981
United Rentals, Inc. (a)		6,469		2,149,584
Verisk Analytics, Inc.		14,397		3,293,026
				74,891,169
Cosmetics & Personal Care — 1.4%
Colgate-Palmolive Co.		75,265		6,423,115
The Estee Lauder Cos., Inc. Class A		20,797		7,699,049
The Procter & Gamble Co.		217,051		35,505,203
				49,627,367
Food — 0.9%
Campbell Soup Co.		17,963		780,672
Conagra Brands, Inc.		43,374		1,481,222
General Mills, Inc.		54,619		3,680,228
The Hershey Co.		13,143		2,542,776
Hormel Foods Corp.		24,926		1,216,638
The J.M. Smucker Co.		9,798		1,330,764
Kellogg Co.		22,825		1,470,387
The Kraft Heinz Co.		63,231		2,269,993
The Kroger Co.		61,030		2,762,218
Lamb Weston Holdings, Inc.		12,882		816,461
McCormick & Co., Inc.		22,260		2,150,539
Mondelez International, Inc. Class A		124,682		8,267,664
Sysco Corp.		46,255		3,633,330

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

	Number of Shares		Value
Tyson Foods, Inc. Class A		26,569	$	2,315,754
				34,718,646
Health Care – Products — 4.1%
Abbott Laboratories		158,624		22,324,742
ABIOMED, Inc. (a)		4,050		1,454,638
Align Technology, Inc. (a)		6,589		4,330,159
Baxter International, Inc.		44,903		3,854,473
Bio-Techne Corp.		3,530		1,826,210
Boston Scientific Corp. (a)		127,697		5,424,569
The Cooper Cos., Inc.		4,377		1,833,700
Danaher Corp.		57,020		18,760,150
Dentsply Sirona, Inc.		19,848		1,107,320
Edwards Lifesciences Corp. (a)		55,899		7,241,715
Henry Schein, Inc. (a)		12,435		964,085
Hologic, Inc. (a)		22,748		1,741,587
IDEXX Laboratories, Inc. (a)		7,582		4,992,444
Intuitive Surgical, Inc. (a)		31,982		11,491,133
Medtronic PLC		120,755		12,492,105
PerkinElmer, Inc.		11,360		2,284,042
ResMed, Inc.		13,035		3,395,357
Steris PLC		9,012		2,193,611
Stryker Corp.		30,131		8,057,632
Teleflex, Inc.		4,168		1,369,105
Thermo Fisher Scientific, Inc.		35,333		23,575,591
Waters Corp. (a)		5,430		2,023,218
West Pharmaceutical Services, Inc.		6,601		3,095,935
Zimmer Biomet Holdings, Inc.		18,689		2,374,251
				148,207,772
Health Care – Services — 2.3%
Anthem, Inc.		21,795		10,102,854
Catalent, Inc. (a)		15,417		1,973,839
Centene Corp. (a)		52,151		4,297,242
Charles River Laboratories International, Inc. (a)		4,475		1,686,091
DaVita, Inc. (a)		5,909		672,208
HCA Healthcare, Inc.		21,461		5,513,760
Humana, Inc.		11,507		5,337,637
IQVIA Holdings, Inc. (a)		17,207		4,854,783
Laboratory Corp. of America Holdings (a)		8,651		2,718,231
Quest Diagnostics, Inc.		10,930		1,890,999
UnitedHealth Group, Inc.		84,493		42,427,315
Universal Health Services, Inc. Class B		6,618		858,090
				82,333,049
Household Products & Wares — 0.3%
Avery Dennison Corp.		7,345		1,590,707
Church & Dwight Co., Inc.		21,907		2,245,467
The Clorox Co.		11,097		1,934,873
Kimberly-Clark Corp.		30,008		4,288,743
				10,059,790
Pharmaceuticals — 5.2%
AbbVie, Inc.		158,411		21,448,849
AmerisourceBergen Corp.		13,375		1,777,404
Becton Dickinson and Co.		25,789		6,485,418

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

	Number of Shares		Value
Bristol-Myers Squibb Co.		198,745	$	12,391,751
Cardinal Health, Inc.		25,327		1,304,087
Cigna Corp.		29,620		6,801,640
CVS Health Corp.		118,224		12,195,988
DexCom, Inc. (a)		8,725		4,684,889
Eli Lilly & Co.		71,153		19,653,882
Johnson & Johnson		236,087		40,387,403
McKesson Corp.		13,764		3,421,317
Merck & Co., Inc.		226,425		17,353,212
Organon & Co.		23,583		718,102
Pfizer, Inc.		503,114		29,708,882
Viatris, Inc.		109,755		1,484,985
Zoetis, Inc.		42,490		10,368,835
				190,186,644
				718,380,751
Energy — 2.8%
Energy – Alternate Sources — 0.1%
Enphase Energy, Inc. (a)		12,108		2,215,038
SolarEdge Technologies, Inc. (a)		4,737		1,329,060
				3,544,098
Oil & Gas — 2.3%
APA Corp.		32,848		883,283
Chevron Corp.		172,614		20,256,253
ConocoPhillips		118,493		8,552,825
Coterra Energy, Inc.		73,431		1,395,189
Devon Energy Corp.		55,877		2,461,382
Diamondback Energy, Inc.		15,147		1,633,604
EOG Resources, Inc.		52,409		4,655,491
Exxon Mobil Corp.		379,361		23,213,099
Hess Corp.		24,957		1,847,567
Marathon Oil Corp.		70,516		1,157,873
Marathon Petroleum Corp.		54,796		3,506,396
Occidental Petroleum Corp.		79,533		2,305,662
Phillips 66		39,383		2,853,692
Pioneer Natural Resources Co.		20,470		3,723,083
Valero Energy Corp.		36,728		2,758,640
				81,204,039
Oil & Gas Services — 0.2%
Baker Hughes Co.		78,609		1,891,333
Halliburton Co.		80,335		1,837,261
Schlumberger NV		125,055		3,745,397
				7,473,991
Pipelines — 0.2%
Kinder Morgan, Inc.		175,950		2,790,567
ONEOK, Inc.		40,241		2,364,561
The Williams Cos., Inc.		107,962		2,811,331
				7,966,459
				100,188,587

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

	Number of Shares		Value
Financial — 14.5%
Banks — 4.9%
Bank of America Corp.		645,523	$	28,719,318
The Bank of New York Mellon Corp.		68,493		3,978,073
Citigroup, Inc.		177,780		10,736,134
Citizens Financial Group, Inc.		37,674		1,780,097
Comerica, Inc.		11,677		1,015,899
Fifth Third Bancorp		61,542		2,680,154
First Republic Bank		16,168		3,338,854
The Goldman Sachs Group, Inc.		30,369		11,617,661
Huntington Bancshares, Inc.		130,015		2,004,831
JP Morgan Chase & Co.		265,061		41,972,409
KeyCorp.		83,192		1,924,231
M&T Bank Corp.		11,372		1,746,512
Morgan Stanley		128,493		12,612,873
Northern Trust Corp.		18,828		2,252,017
The PNC Financial Services Group, Inc.		37,922		7,604,120
Regions Financial Corp.		85,757		1,869,503
Signature Bank		5,466		1,768,087
State Street Corp.		32,835		3,053,655
SVB Financial Group (a)		5,293		3,589,924
Truist Financial Corp.		119,248		6,981,970
US Bancorp		120,636		6,776,124
Wells Fargo & Co.		357,369		17,146,565
Zions Bancorp NA		13,880		876,661
				176,045,672
Diversified Financial Services — 3.6%
American Express Co.		56,219		9,197,428
Ameriprise Financial, Inc.		10,002		3,017,203
BlackRock, Inc.		12,799		11,718,253
Capital One Financial Corp.		38,004		5,514,000
Cboe Global Markets, Inc.		9,697		1,264,489
The Charles Schwab Corp.		134,694		11,327,765
CME Group, Inc.		32,205		7,357,554
Discover Financial Services		26,456		3,057,255
Franklin Resources, Inc.		24,983		836,681
Intercontinental Exchange, Inc.		50,601		6,920,699
Invesco Ltd.		29,998		690,554
Mastercard, Inc. Class A		77,778		27,947,191
Nasdaq, Inc.		10,373		2,178,434
Raymond James Financial, Inc.		16,734		1,680,094
Synchrony Financial		49,387		2,291,063
T. Rowe Price Group, Inc.		20,246		3,981,173
Visa, Inc. Class A		150,388		32,590,584
				131,570,420
Insurance — 3.2%
Aflac, Inc.		54,657		3,191,422
The Allstate Corp.		25,854		3,041,723
American International Group, Inc.		74,029		4,209,289
Aon PLC Class A		19,747		5,935,158
Arthur J Gallagher & Co.		18,514		3,141,270
Assurant, Inc.		5,117		797,536
Berkshire Hathaway, Inc. Class B (a)		164,279		49,119,421
Brown & Brown, Inc.		21,156		1,486,844

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

	Number of Shares		Value
Chubb Ltd.		38,579	$	7,457,707
Cincinnati Financial Corp.		13,531		1,541,587
Everest Re Group Ltd.		3,546		971,320
Globe Life, Inc.		8,284		776,376
The Hartford Financial Services Group, Inc.		30,727		2,121,392
Lincoln National Corp.		15,366		1,048,883
Loews Corp.		18,217		1,052,214
Marsh & McLennan Cos., Inc.		45,237		7,863,095
MetLife, Inc.		63,956		3,996,610
Principal Financial Group, Inc.		21,750		1,573,178
The Progressive Corp.		52,571		5,396,413
Prudential Financial, Inc.		33,795		3,657,971
The Travelers Cos., Inc.		21,918		3,428,633
W.R. Berkley Corp.		12,355		1,017,928
Willis Towers Watson PLC		11,248		2,671,288
				115,497,258
Real Estate — 0.1%
CBRE Group, Inc. Class A (a)		29,912		3,245,751
Real Estate Investment Trusts (REITS) — 2.7%
Alexandria Real Estate Equities, Inc.		12,558		2,799,932
American Tower Corp.		40,855		11,950,087
AvalonBay Communities, Inc.		12,536		3,166,468
Boston Properties, Inc.		12,620		1,453,572
Crown Castle International Corp.		38,774		8,093,685
Digital Realty Trust, Inc.		25,433		4,498,335
Duke Realty Corp.		34,288		2,250,664
Equinix, Inc.		8,076		6,831,004
Equity Residential		30,595		2,768,847
Essex Property Trust, Inc.		5,787		2,038,355
Extra Space Storage, Inc.		11,890		2,695,820
Federal Realty Investment Trust		6,401		872,584
Healthpeak Properties, Inc.		47,954		1,730,660
Host Hotels & Resorts, Inc. (a)		64,014		1,113,203
Iron Mountain, Inc. (b)		26,160		1,368,953
Kimco Realty Corp.		55,902		1,377,984
Mid-America Apartment Communities, Inc.		10,345		2,373,557
Prologis, Inc.		66,221		11,148,968
Public Storage		13,717		5,137,839
Realty Income Corp.		50,571		3,620,378
Regency Centers Corp.		14,049		1,058,592
SBA Communications Corp.		9,733		3,786,332
Simon Property Group, Inc.		29,422		4,700,753
UDR, Inc.		26,316		1,578,697
Ventas, Inc.		35,460		1,812,715
Vornado Realty Trust		13,707		573,775
Welltower, Inc.		38,886		3,335,252
Weyerhaeuser Co.		67,398		2,775,450
				96,912,461
Savings & Loans — 0.0%
People's United Financial, Inc.		39,240		699,257
				523,970,819

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

	Number of Shares		Value
Industrial — 7.5%
Aerospace & Defense — 1.3%
The Boeing Co. (a)		49,639	$	9,993,324
General Dynamics Corp.		20,656		4,306,156
Howmet Aerospace, Inc.		33,679		1,072,003
L3 Harris Technologies, Inc.		17,499		3,731,487
Lockheed Martin Corp.		22,048		7,836,080
Northrop Grumman Corp.		13,334		5,161,191
Raytheon Technologies Corp.		134,451		11,570,853
Teledyne Technologies, Inc. (a)		4,210		1,839,307
TransDigm Group, Inc. (a)		4,726		3,007,059
				48,517,460
Building Materials — 0.5%
Carrier Global Corp.		77,640		4,211,193
Fortune Brands Home & Security, Inc.		11,929		1,275,210
Johnson Controls International PLC		63,788		5,186,602
Martin Marietta Materials, Inc.		5,642		2,485,414
Masco Corp.		21,712		1,524,617
Vulcan Materials Co.		11,993		2,489,507
				17,172,543
Electrical Components & Equipment — 0.3%
AMETEK, Inc.		20,708		3,044,904
Emerson Electric Co.		53,646		4,987,469
Generac Holdings, Inc. (a)		5,632		1,982,013
				10,014,386
Electronics — 1.1%
Agilent Technologies, Inc.		27,099		4,326,355
Allegion PLC		7,979		1,056,739
Amphenol Corp. Class A		53,688		4,695,552
Fortive Corp.		31,989		2,440,441
Garmin Ltd.		13,499		1,838,159
Honeywell International, Inc.		61,723		12,869,863
Keysight Technologies, Inc. (a)		16,458		3,398,742
Mettler-Toledo International, Inc. (a)		2,067		3,508,133
TE Connectivity Ltd.		29,316		4,729,843
Trimble, Inc. (a)		22,305		1,944,773
				40,808,600
Engineering & Construction — 0.0%
Jacobs Engineering Group, Inc.		11,545		1,607,410
Environmental Controls — 0.3%
Pentair PLC		14,540		1,061,856
Republic Services, Inc.		18,754		2,615,245
Waste Management, Inc.		34,491		5,756,548
				9,433,649
Hand & Machine Tools — 0.1%
Snap-on, Inc.		4,700		1,012,286

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

	Number of Shares		Value
Stanley Black & Decker, Inc.		14,685	$	2,769,885
				3,782,171
Machinery – Construction & Mining — 0.3%
Caterpillar, Inc.		48,432		10,012,832
Machinery – Diversified — 0.7%
Deere & Co.		25,253		8,659,001
Dover Corp.		12,958		2,353,173
IDEX Corp.		6,759		1,597,287
Ingersoll Rand, Inc.		36,617		2,265,494
Otis Worldwide Corp.		38,182		3,324,507
Rockwell Automation, Inc.		10,449		3,645,134
Westinghouse Air Brake Technologies Corp.		16,803		1,547,724
Xylem, Inc.		16,023		1,921,478
				25,313,798
Miscellaneous - Manufacturing — 1.1%
3M Co.		51,634		9,171,747
A.O. Smith Corp.		12,220		1,049,087
Eaton Corp. PLC		35,588		6,150,318
General Electric Co.		98,386		9,294,526
Illinois Tool Works, Inc.		25,684		6,338,811
Parker-Hannifin Corp.		11,495		3,656,789
Textron, Inc.		19,569		1,510,727
Trane Technologies PLC		21,288		4,300,815
				41,472,820
Packaging & Containers — 0.2%
Amcor PLC		138,745		1,666,327
Ball Corp.		29,099		2,801,361
Packaging Corp. of America		8,475		1,153,871
Sealed Air Corp.		13,179		889,187
WestRock Co.		24,013		1,065,217
				7,575,963
Shipbuilding — 0.0%
Huntington Ingalls Industries, Inc.		3,554		663,674
Transportation — 1.6%
C.H. Robinson Worldwide, Inc.		11,732		1,262,715
CSX Corp.		198,547		7,465,367
Expeditors International of Washington, Inc.		15,242		2,046,848
FedEx Corp.		21,888		5,661,113
J.B. Hunt Transport Services, Inc.		7,566		1,546,491
Norfolk Southern Corp.		21,782		6,484,719
Old Dominion Freight Line, Inc.		8,392		3,007,525
Union Pacific Corp.		57,641		14,521,497
United Parcel Service, Inc. Class B		65,374		14,012,263
				56,008,538
				272,383,844

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

	Number of Shares		Value
Technology — 25.4%
Computers — 8.5%
Accenture PLC Class A		56,600	$	23,463,530
Apple, Inc.		1,397,281		248,115,187
Cognizant Technology Solutions Corp. Class A		47,105		4,179,156
DXC Technology Co. (a)		22,535		725,402
EPAM Systems, Inc. (a)		5,076		3,393,052
Fortinet, Inc. (a)		12,221		4,392,227
Hewlett Packard Enterprise Co.		118,059		1,861,790
HP, Inc.		103,973		3,916,663
International Business Machines Corp.		80,378		10,743,324
Leidos Holdings, Inc.		12,609		1,120,940
NetApp, Inc.		20,244		1,862,246
Seagate Technology Holdings PLC		18,476		2,087,418
Western Digital Corp. (a)		28,101		1,832,466
				307,693,401
Office & Business Equipment — 0.1%
Zebra Technologies Corp. Class A (a)		4,757		2,831,366
Semiconductors — 6.3%
Advanced Micro Devices, Inc. (a)		108,227		15,573,865
Analog Devices, Inc.		48,253		8,481,430
Applied Materials, Inc.		80,903		12,730,896
Broadcom, Inc.		36,904		24,556,291
Intel Corp.		364,654		18,779,681
IPG Photonics Corp. (a)		3,140		540,520
KLA Corp.		13,571		5,837,023
Lam Research Corp.		12,616		9,072,796
Microchip Technology, Inc.		49,659		4,323,312
Micron Technology, Inc.		100,434		9,355,427
Monolithic Power Systems, Inc.		3,912		1,929,907
NVIDIA Corp.		224,113		65,913,874
NXP Semiconductor NV		23,797		5,420,481
Qorvo, Inc. (a)		9,795		1,531,840
QUALCOMM, Inc.		100,411		18,362,160
Skyworks Solutions, Inc.		14,855		2,304,605
Teradyne, Inc.		14,677		2,400,130
Texas Instruments, Inc.		82,826		15,610,216
Xilinx, Inc.		22,169		4,700,493
				227,424,947
Software — 10.5%
Activision Blizzard, Inc.		69,811		4,644,526
Adobe, Inc. (a)		42,648		24,183,975
Akamai Technologies, Inc. (a)		14,776		1,729,383
ANSYS, Inc. (a)		7,842		3,145,583
Autodesk, Inc. (a)		19,762		5,556,877
Broadridge Financial Solutions, Inc.		10,549		1,928,568
Cadence Design Systems, Inc. (a)		24,943		4,648,128
Ceridian HCM Holding, Inc. (a)		12,232		1,277,755
Cerner Corp.		26,361		2,448,146
Citrix Systems, Inc.		11,380		1,076,434
Electronic Arts, Inc.		25,445		3,356,195
Fidelity National Information Services, Inc.		54,485		5,947,038
Fiserv, Inc. (a)		53,190		5,520,590

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

	Number of Shares		Value
Intuit, Inc.		25,361	$	16,312,702
Jack Henry & Associates, Inc.		6,704		1,119,501
Microsoft Corp.		673,161		226,397,507
MSCI, Inc.		7,385		4,524,716
Oracle Corp.		144,555		12,606,642
Paychex, Inc.		28,603		3,904,309
Paycom Software, Inc. (a)		4,315		1,791,545
PTC, Inc. (a)		9,305		1,127,301
Roper Technologies, Inc.		9,497		4,671,194
salesforce.com, Inc. (a)		87,764		22,303,465
ServiceNow, Inc. (a)		17,805		11,557,404
Synopsys, Inc. (a)		13,620		5,018,970
Take-Two Interactive Software, Inc. (a)		10,272		1,825,540
Tyler Technologies, Inc. (a)		3,687		1,983,422
				380,607,416
				918,557,130
Utilities — 2.5%
Electric — 2.3%
AES Corp.		60,471		1,469,445
Alliant Energy Corp.		22,596		1,388,976
Ameren Corp.		22,972		2,044,738
American Electric Power Co., Inc.		45,157		4,017,618
CenterPoint Energy, Inc.		56,558		1,578,534
CMS Energy Corp.		25,762		1,675,818
Consolidated Edison, Inc.		31,475		2,685,447
Dominion Energy, Inc.		72,851		5,723,174
DTE Energy Co.		17,400		2,079,996
Duke Energy Corp.		69,007		7,238,834
Edison International		34,004		2,320,773
Entergy Corp.		17,919		2,018,575
Evergy, Inc.		20,337		1,395,322
Eversource Energy		30,907		2,811,919
Exelon Corp.		88,004		5,083,111
FirstEnergy Corp.		48,635		2,022,730
NextEra Energy, Inc.		176,131		16,443,590
NRG Energy, Inc.		22,370		963,700
Pinnacle West Capital Corp.		10,000		705,900
PPL Corp.		66,913		2,011,405
Public Service Enterprise Group, Inc.		45,712		3,050,362
Sempra Energy		28,555		3,777,255
The Southern Co.		95,291		6,535,057
WEC Energy Group, Inc.		28,239		2,741,160
Xcel Energy, Inc.		48,119		3,257,656
				85,041,095
Gas — 0.1%
Atmos Energy Corp.		12,032		1,260,593
NiSource, Inc.		34,851		962,236
				2,222,829
Water — 0.1%
American Water Works Co., Inc.		16,206		3,060,665

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

	Number of Shares		Value
			$	90,324,589
TOTAL COMMON STOCK (Cost $1,638,131,318)				3,618,204,944
TOTAL EQUITIES (Cost $1,638,131,318)				3,618,204,944
TOTAL LONG-TERM INVESTMENTS (Cost $1,638,131,318)				3,618,204,944
	Principal Amount
SHORT-TERM INVESTMENTS — 0.7%
Repurchase Agreement — 0.5%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (c)	$	16,855,370		16,855,370
U.S. Treasury Bill — 0.2%
U.S. Treasury Bill
0.038% 1/27/22 (d) (e)		7,365,000		7,364,865
TOTAL SHORT-TERM INVESTMENTS (Cost $24,220,170)				24,220,235
TOTAL INVESTMENTS — 100.6% (Cost $1,662,351,488) (f)				3,642,425,179
Other Assets/(Liabilities) — (0.6)%				(20,276,046)
NET ASSETS — 100.0%			$	3,622,149,133

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 December 31, 2021, was $2,171,068 or 0.06% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $2,231,960 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 $16,855,370. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $17,192,499.

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

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

(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	3/18/22	108	$	25,437,994	$	257,906

MassMutual Equity Opportunities Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 100.6%
COMMON STOCK — 99.9%
Basic Materials — 7.1%
Chemicals — 6.6%
CF Industries Holdings, Inc.		58,000	$	4,105,240
Ecolab, Inc.		101,259		23,754,349
International Flavors & Fragrances, Inc.		26,600		4,007,290
Linde PLC		57,471		19,909,678
				51,776,557
Forest Products & Paper — 0.5%
International Paper Co.		81,200		3,814,776
				55,591,333
Communications — 1.1%
Media — 1.1%
Comcast Corp. Class A		111,400		5,606,762
The Walt Disney Co. (a)		20,950		3,244,945
				8,851,707
Consumer, Cyclical — 11.2%
Apparel — 3.1%
NIKE, Inc. Class B		148,631		24,772,329
Lodging — 0.3%
Las Vegas Sands Corp. (a)		62,100		2,337,444
Retail — 7.8%
McDonald's Corp.		104,752		28,080,869
The TJX Cos., Inc.		435,458		33,059,971
				61,140,840
				88,250,613
Consumer, Non-cyclical — 36.2%
Agriculture — 0.4%
Philip Morris International, Inc.		30,800		2,926,000
Beverages — 8.3%
The Coca-Cola Co.		363,651		21,531,776
Diageo PLC		272,371		14,847,737
PepsiCo, Inc.		167,009		29,011,133
				65,390,646

MassMutual Equity Opportunities Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Cosmetics & Personal Care — 7.1%
Colgate-Palmolive Co.		364,837	$	31,135,190
The Procter & Gamble Co.		152,988		25,025,777
				56,160,967
Food — 1.0%
Conagra Brands, Inc.		62,500		2,134,375
Tyson Foods, Inc. Class A		71,500		6,231,940
				8,366,315
Health Care – Products — 7.2%
Baxter International, Inc.		183,077		15,715,330
Danaher Corp.		25,563		8,410,482
Medtronic PLC		234,803		24,290,370
Stryker Corp.		30,154		8,063,783
				56,479,965
Health Care – Services — 5.3%
Anthem, Inc.		25,627		11,879,140
UnitedHealth Group, Inc.		59,216		29,734,722
				41,613,862
Household Products & Wares — 0.6%
Kimberly-Clark Corp.		35,500		5,073,660
Pharmaceuticals — 6.3%
AbbVie, Inc.		43,200		5,849,280
Becton Dickinson and Co.		25,650		6,450,462
CVS Health Corp.		43,950		4,533,882
Johnson & Johnson		167,992		28,738,392
Sanofi Sponsored ADR		80,400		4,028,040
				49,600,056
				285,611,471
Energy — 1.6%
Oil & Gas — 1.6%
EOG Resources, Inc.		25,550		2,269,607
TotalEnergies SE		155,200		7,882,726
TotalEnergies SE Sponsored ADR		50,000		2,473,000
				12,625,333
				12,625,333
Financial — 21.7%
Banks — 3.7%
Fifth Third Bancorp		138,700		6,040,385
The Goldman Sachs Group, Inc.		9,750		3,729,862
Huntington Bancshares, Inc.		218,000		3,361,560
State Street Corp.		30,000		2,790,000
Wells Fargo & Co.		271,800		13,040,964
				28,962,771

MassMutual Equity Opportunities Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Diversified Financial Services — 6.4%
American Express Co.		127,996	$	20,940,146
Visa, Inc. Class A		137,012		29,691,870
				50,632,016
Insurance — 9.6%
American International Group, Inc.		135,300		7,693,158
Chubb Ltd.		168,081		32,491,738
Loews Corp.		69,600		4,020,096
Marsh & McLennan Cos., Inc.		156,852		27,264,015
MetLife, Inc.		67,200		4,199,328
				75,668,335
Real Estate Investment Trusts (REITS) — 2.0%
American Tower Corp.		26,697		7,808,873
Equity Residential		47,550		4,303,275
Weyerhaeuser Co.		78,800		3,244,984
				15,357,132
				170,620,254
Industrial — 12.2%
Aerospace & Defense — 6.6%
The Boeing Co. (a)		12,400		2,496,368
L3 Harris Technologies, Inc.		25,200		5,373,648
Lockheed Martin Corp.		52,635		18,707,006
Northrop Grumman Corp.		65,732		25,442,885
				52,019,907
Electronics — 0.7%
Honeywell International, Inc.		25,214		5,257,371
Miscellaneous - Manufacturing — 1.1%
General Electric Co.		92,950		8,780,986
Transportation — 3.8%
Union Pacific Corp.		85,497		21,539,259
United Parcel Service, Inc. Class B		40,000		8,573,600
				30,112,859
				96,171,123
Technology — 6.6%
Computers — 1.7%
Accenture PLC Class A		32,703		13,557,029
Semiconductors — 1.3%
QUALCOMM, Inc.		53,450		9,774,401
Software — 3.6%
Citrix Systems, Inc.		19,950		1,887,070

MassMutual Equity Opportunities Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Microsoft Corp.		79,058	$	26,588,787
				28,475,857
				51,807,287
Utilities — 2.2%
Electric — 2.0%
Sempra Energy		54,350		7,189,418
The Southern Co.		126,100		8,647,938
				15,837,356
Gas — 0.2%
NiSource, Inc.		63,400		1,750,474
				17,587,830
TOTAL COMMON STOCK (Cost $580,914,450)				787,116,951
PREFERRED STOCK — 0.7%
Consumer, Cyclical — 0.3%
Auto Manufacturers — 0.3%
Volkswagen AG 2.560%		13,450		2,718,103
Consumer, Non-cyclical — 0.1%
Pharmaceuticals — 0.1%
Becton Dickinson and Co. Convertible 6.000% (b)		14,700		775,425
Utilities — 0.3%
Electric — 0.2%
The Southern Co. Convertible 6.750%		23,100		1,241,625
Gas — 0.1%
NiSource, Inc. 7.750%		8,204		918,766
				2,160,391
TOTAL PREFERRED STOCK (Cost $5,893,466)				5,653,919
TOTAL EQUITIES (Cost $586,807,916)				792,770,870
MUTUAL FUNDS — 0.1%
Diversified Financial Services — 0.1%
State Street Navigator Securities Lending Government Money Market Portfolio (c)		783,810		783,810
TOTAL MUTUAL FUNDS (Cost $783,810)				783,810
TOTAL LONG-TERM INVESTMENTS (Cost $587,591,726)				793,554,680
SHORT-TERM INVESTMENTS — 2.3%

MassMutual Equity Opportunities Fund —  Portfolio of Investments (Continued)

	Number of Shares
Mutual Fund — 0.0%
T. Rowe Price Government Reserve Investment Fund		156	$	156
	Principal Amount
Repurchase Agreement — 2.3%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (d)	$	17,702,521		17,702,521
TOTAL SHORT-TERM INVESTMENTS (Cost $17,702,677)				17,702,677
TOTAL INVESTMENTS — 103.0% (Cost $605,294,403) (e)				811,257,357
Other Assets/(Liabilities) — (3.0)%				(23,409,085)
NET ASSETS — 100.0%			$	787,848,272

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 December 31, 2021, was $767,681 or 0.10% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $2,495 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 $17,702,521. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $18,056,682.

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

MassMutual Fundamental Growth Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.1%
COMMON STOCK — 99.1%
Basic Materials — 0.7%
Chemicals — 0.7%
Celanese Corp.		2,130	$	357,968
Communications — 11.5%
Internet — 9.8%
CDW Corp.		5,238		1,072,638
Etsy, Inc. (a)		3,391		742,426
Expedia Group, Inc. (a)		1,800		325,296
Match Group, Inc. (a)		6,605		873,511
Palo Alto Networks, Inc. (a)		2,548		1,418,624
Zendesk, Inc. (a)		5,300		552,737
				4,985,232
Telecommunications — 1.7%
Juniper Networks, Inc.		8,540		304,963
Nice Ltd. Sponsored ADR (a) (b)		1,760		534,336
				839,299
				5,824,531
Consumer, Cyclical — 12.8%
Apparel — 1.0%
Tapestry, Inc.		11,980		486,388
Distribution & Wholesale — 1.9%
Copart, Inc. (a)		3,540		536,735
WESCO International, Inc. (a)		3,380		444,774
				981,509
Entertainment — 1.8%
Live Nation Entertainment, Inc. (a)		4,740		567,331
Vail Resorts, Inc.		1,130		370,527
				937,858
Lodging — 1.8%
Hilton Worldwide Holdings, Inc. (a)		5,717		891,795
Retail — 6.3%
Freshpet, Inc. (a)		5,078		483,781
Lululemon Athletica, Inc. (a)		2,050		802,472
Ross Stores, Inc.		2,230		254,844
Ulta Beauty, Inc. (a)		1,290		531,919
Williams-Sonoma, Inc. (b)		2,200		372,086

MassMutual Fundamental Growth Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Wingstop, Inc.		4,372	$	755,482
				3,200,584
				6,498,134
Consumer, Non-cyclical — 31.0%
Biotechnology — 5.2%
Ascendis Pharma A/S ADR (a)		3,300		443,949
Horizon Therapeutics PLC (a)		4,340		467,678
Rocket Pharmaceuticals, Inc. (a)		4,530		98,890
Seagen, Inc. (a)		10,566		1,633,504
				2,644,021
Commercial Services — 11.4%
Chegg, Inc. (a)		17,801		546,491
Gartner, Inc. (a)		3,129		1,046,087
Global Payments, Inc.		3,750		506,925
MarketAxess Holdings, Inc.		2,127		874,771
Shift4 Payments, Inc. Class A (a)		13,724		795,031
TransUnion		16,879		2,001,512
				5,770,817
Health Care – Products — 7.9%
ABIOMED, Inc. (a)		1,174		421,666
Align Technology, Inc. (a)		1,260		828,047
Avantor, Inc. (a)		8,890		374,625
The Cooper Cos., Inc.		915		383,330
IDEXX Laboratories, Inc. (a)		893		588,005
Insulet Corp. (a)		1,250		332,587
Omnicell, Inc. (a)		6,074		1,095,992
				4,024,252
Health Care – Services — 5.7%
ICON PLC (a)		7,699		2,384,380
Quest Diagnostics, Inc.		2,740		474,048
				2,858,428
Pharmaceuticals — 0.8%
DexCom, Inc. (a)		740		397,343
				15,694,861
Energy — 0.9%
Oil & Gas — 0.9%
Devon Energy Corp.		10,860		478,383
Financial — 5.9%
Diversified Financial Services — 3.2%
Hamilton Lane, Inc. Class A		7,622		789,792
LPL Financial Holdings, Inc.		3,180		509,086
Tradeweb Markets, Inc. Class A		3,410		341,477
				1,640,355

MassMutual Fundamental Growth Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Insurance — 1.3%
Arthur J Gallagher & Co.		3,910	$	663,410
Real Estate Investment Trusts (REITS) — 1.4%
Douglas Emmett, Inc.		7,270		243,545
Essex Property Trust, Inc.		1,320		464,943
				708,488
				3,012,253
Industrial — 10.2%
Aerospace & Defense — 4.0%
BWX Technologies, Inc.		12,179		583,131
Hexcel Corp. (a)		11,349		587,878
Teledyne Technologies, Inc. (a)		855		373,541
TransDigm Group, Inc. (a)		779		495,662
				2,040,212
Building Materials — 1.9%
Fortune Brands Home & Security, Inc.		9,040		966,376
Electrical Components & Equipment — 0.9%
AMETEK, Inc.		2,880		423,475
Environmental Controls — 0.7%
Waste Connections, Inc.		2,720		370,654
Machinery – Diversified — 1.9%
IDEX Corp.		1,600		378,112
Rockwell Automation, Inc.		1,655		577,347
				955,459
Miscellaneous - Manufacturing — 0.8%
Trane Technologies PLC		2,020		408,101
				5,164,277
Technology — 26.1%
Computers — 5.1%
Cognizant Technology Solutions Corp. Class A		4,780		424,082
Fortinet, Inc. (a)		2,430		873,342
NetApp, Inc.		4,070		374,399
Varonis Systems, Inc. (a)		18,380		896,577
				2,568,400
Semiconductors — 7.4%
KLA Corp.		1,992		856,779
Microchip Technology, Inc.		6,120		532,807
ON Semiconductor Corp. (a)		4,900		332,808
Skyworks Solutions, Inc.		3,027		469,609
Synaptics, Inc. (a)		2,364		684,402
Teradyne, Inc.		2,480		405,554
Xilinx, Inc.		2,270		481,308
				3,763,267

MassMutual Fundamental Growth Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Software — 13.6%
Avalara, Inc. (a)		7,614	$	983,043
Ceridian HCM Holding, Inc. (a)		9,187		959,674
Digital Turbine, Inc. (a) (b)		7,522		458,767
Guidewire Software, Inc. (a)		4,107		466,268
HubSpot, Inc. (a)		754		496,999
Lightspeed Commerce, Inc. (a)		5,650		228,429
MongoDB, Inc. (a)		500		264,675
MSCI, Inc.		755		462,581
Nutanix, Inc. Class A (a)		11,560		368,302
Splunk, Inc. (a)		2,850		329,802
Twilio, Inc. Class A (a)		1,435		377,893
ZoomInfo Technologies, Inc. Class A (a)		23,110		1,483,662
				6,880,095
				13,211,762
TOTAL COMMON STOCK (Cost $43,433,546)				50,242,169
TOTAL EQUITIES (Cost $43,433,546)				50,242,169
TOTAL LONG-TERM INVESTMENTS (Cost $43,433,546)				50,242,169
	Principal Amount
SHORT-TERM INVESTMENTS — 1.0%
Repurchase Agreement — 1.0%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (c)	$	531,270		531,270
TOTAL SHORT-TERM INVESTMENTS (Cost $531,270)				531,270
TOTAL INVESTMENTS — 100.1% (Cost $43,964,816) (d)				50,773,439
Other Assets/(Liabilities) — (0.1)%				(61,376)
NET ASSETS — 100.0%			$	50,712,063

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 December 31, 2021, was $1,349,308 or 2.66% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $1,383,909 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 $531,270. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $541,923.

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

MassMutual Blue Chip Growth Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.1%
COMMON STOCK — 99.0%
Basic Materials — 0.2%
Chemicals — 0.2%
Linde PLC		19,246	$	6,667,392
The Sherwin-Williams Co.		4,427		1,559,012
				8,226,404
Communications — 33.3%
Internet — 29.7%
Alibaba Group Holding Ltd. Sponsored ADR (a)		193,981		23,043,003
Alphabet, Inc. Class A (a)		43,329		125,525,846
Alphabet, Inc. Class C (a)		94,051		272,145,033
Amazon.com, Inc. (a)		111,703		372,455,781
Booking Holdings, Inc. (a)		4,955		11,888,185
Delivery Hero SE (a) (b)		28,090		3,136,169
DoorDash, Inc., Class A (a)		101,819		15,160,849
Meta Platforms, Inc. Class A (a)		846,500		284,720,275
Netflix, Inc. (a)		74,378		44,808,283
Opendoor Technologies, Inc. (a)		218,590		3,193,600
Pinterest, Inc. Class A (a)		253,590		9,217,997
Roku, Inc. (a)		9,706		2,214,909
Sea Ltd. ADR (a)		175,765		39,320,388
Shopify, Inc. Class A (a)		11,590		15,963,950
Snap, Inc. Class A (a)		655,509		30,828,588
Spotify Technology SA (a)		31,705		7,419,921
Tencent Holdings Ltd.		213,700		12,536,332
				1,273,579,109
Media — 2.6%
FactSet Research Systems, Inc.		71,240		34,623,352
The Walt Disney Co. (a)		504,049		78,072,150
				112,695,502
Telecommunications — 1.0%
Cisco Systems, Inc.		596,520		37,801,472
T-Mobile US, Inc. (a)		39,706		4,605,102
				42,406,574
				1,428,681,185
Consumer, Cyclical — 7.2%
Apparel — 0.5%
NIKE, Inc. Class B		121,169		20,195,237

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

	Number of Shares		Value
Auto Manufacturers — 2.1%
Rivian Automotive, Inc. Class A (a)		97,857	$	10,146,793
Rivian Automotive, Inc., Lockup Shares (Acquired 1/19/21-11/18/21, Cost $12,901,166) (a) (c) (d)		265,643		26,167,297
Tesla, Inc. (a)		51,808		54,749,658
				91,063,748
Distribution & Wholesale — 0.2%
Copart, Inc. (a)		43,129		6,539,219
Retail — 4.4%
Carvana Co. (a)		102,789		23,825,462
Chipotle Mexican Grill, Inc. (a)		9,938		17,374,109
Dollar General Corp.		69,809		16,463,056
Lululemon Athletica, Inc. (a)		46,807		18,322,600
Ross Stores, Inc.		157,112		17,954,759
Starbucks Corp.		455,542		53,284,748
The TJX Cos., Inc.		57,254		4,346,724
Yum China Holdings, Inc.		240,506		11,986,819
Yum! Brands, Inc.		188,972		26,240,652
				189,798,929
				307,597,133
Consumer, Non-cyclical — 16.6%
Beverages — 1.4%
Monster Beverage Corp. (a)		628,115		60,324,164
Biotechnology — 3.4%
Illumina, Inc. (a)		120,321		45,774,921
Regeneron Pharmaceuticals, Inc. (a)		80,165		50,625,801
Vertex Pharmaceuticals, Inc. (a)		231,393		50,813,903
				147,214,625
Commercial Services — 2.1%
Affirm Holdings, Inc. (a)		71,534		7,193,459
Ant International Co. Ltd., Class C (Acquired 6/07/18, Cost $3,358,253) (a) (c) (d) (e)		881,113		3,226,548
Automatic Data Processing, Inc.		64,494		15,902,930
Block, Inc. (a)		87,013		14,053,470
Cintas Corp.		6,206		2,750,313
CoStar Group, Inc. (a)		2,297		181,532
Equifax, Inc.		11,073		3,242,064
PayPal Holdings, Inc. (a)		126,892		23,929,293
S&P Global, Inc.		35,488		16,747,852
Toast, Inc., Class A (a)		9,938		344,948
TransUnion		35,125		4,165,122
				91,737,531
Cosmetics & Personal Care — 0.6%
Colgate-Palmolive Co.		281,300		24,006,142
Health Care – Products — 3.3%
Align Technology, Inc. (a)		6,452		4,240,125
Danaher Corp.		87,644		28,835,752

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

	Number of Shares		Value
Intuitive Surgical, Inc. (a)		192,015	$	68,990,989
Stryker Corp.		63,209		16,903,351
Teleflex, Inc.		16,764		5,506,639
Thermo Fisher Scientific, Inc.		23,048		15,378,548
				139,855,404
Health Care – Services — 1.8%
HCA Healthcare, Inc.		79,075		20,315,949
Humana, Inc.		18,425		8,546,621
UnitedHealth Group, Inc.		93,710		47,055,539
				75,918,109
Pharmaceuticals — 4.0%
AstraZeneca PLC Sponsored ADR		90,154		5,251,471
Eli Lilly & Co.		100,050		27,635,811
Novartis AG Sponsored ADR		594,077		51,963,915
Novo Nordisk A/S Sponsored ADR		192,537		21,564,144
Roche Holding AG Sponsored ADR		966,455		49,956,059
Zoetis, Inc.		65,703		16,033,503
				172,404,903
				711,460,878
Energy — 0.6%
Oil & Gas Services — 0.6%
Schlumberger NV		889,126		26,629,324
Financial — 6.3%
Banks — 0.6%
The Goldman Sachs Group, Inc.		61,967		23,705,476
Diversified Financial Services — 5.4%
The Charles Schwab Corp.		134,954		11,349,631
Mastercard, Inc. Class A		124,496		44,733,903
SEI Investments Co.		405,254		24,696,179
Visa, Inc. Class A		701,788		152,084,477
				232,864,190
Insurance — 0.3%
Chubb Ltd.		34,015		6,575,440
Marsh & McLennan Cos., Inc.		25,592		4,448,401
				11,023,841
				267,593,507
Industrial — 4.4%
Aerospace & Defense — 2.0%
The Boeing Co. (a)		431,624		86,894,544
Electronics — 0.1%
TE Connectivity Ltd.		27,458		4,430,074
Machinery – Diversified — 1.2%
Deere & Co.		143,854		49,326,098

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

	Number of Shares		Value
Miscellaneous - Manufacturing — 0.1%
General Electric Co.		66,186	$	6,252,591
Transportation — 1.0%
Expeditors International of Washington, Inc.		322,842		43,354,452
				190,257,759
Technology — 30.4%
Computers — 3.7%
Apple, Inc.		785,605		139,499,880
Crowdstrike Holdings, Inc. Class A (a)		11,733		2,402,332
Fortinet, Inc. (a)		44,938		16,150,717
				158,052,929
Semiconductors — 8.3%
Advanced Micro Devices, Inc. (a)		216,708		31,184,281
ASML Holding NV		26,208		20,865,237
Marvell Technology, Inc.		137,556		12,034,774
Monolithic Power Systems, Inc.		16,108		7,946,560
NVIDIA Corp.		741,688		218,137,858
QUALCOMM, Inc.		250,374		45,785,893
Taiwan Semiconductor Manufacturing Co. Ltd. Sponsored ADR Sponsored ADR		66,729		8,028,166
Texas Instruments, Inc.		59,135		11,145,174
				355,127,943
Software — 18.4%
Atlassian Corp. PLC Class A (a)		28,344		10,807,284
Autodesk, Inc. (a)		276,814		77,837,329
Bill.com Holdings, Inc. (a)		33,621		8,376,672
Canva, Inc. (Acquired 8/16/21, Cost $676,552) (a) (c) (d) (e)		1,351		2,302,322
Coupa Software, Inc. (a)		24,293		3,839,510
Datadog, Inc. Class A (a)		36,534		6,507,071
DocuSign, Inc. (a)		48,704		7,418,106
Fiserv, Inc. (a)		101,145		10,497,840
Gusto, Inc. (Acquired 7/13/21, Cost $1,117,484) (a) (c) (d) (e)		26,606		764,985
HashiCorp, Inc. Class A (a)		18,050		1,643,272
Intuit, Inc.		77,622		49,928,023
Microsoft Corp.		842,361		283,302,851
MongoDB, Inc. (a)		31,052		16,437,376
MSCI, Inc.		5,409		3,314,040
Oracle Corp.		953,667		83,169,299
Paycom Software, Inc. (a)		4,950		2,055,190
Roper Technologies, Inc.		22,007		10,824,363
salesforce.com, Inc. (a)		307,386		78,116,004
ServiceNow, Inc. (a)		87,045		56,501,780
Snowflake, Inc. Class A (a)		13,313		4,509,779
Synopsys, Inc. (a)		68,957		25,410,654
Twilio, Inc. Class A (a)		12,433		3,274,106
Veeva Systems, Inc. Class A (a)		25,127		6,419,446
Workday, Inc. Class A (a)		101,173		27,638,440

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

	Number of Shares		Value
Zoom Video Communications, Inc. Class A (a)		56,195	$	10,334,822
				791,230,564
				1,304,411,436
TOTAL COMMON STOCK (Cost $2,237,086,938)				4,244,857,626
PREFERRED STOCK — 0.1%
Technology — 0.1%
Software — 0.1%
Canva, Inc., Series A (Acquired 11/04/21-12/17/21, Cost $144,893) (a) (c) (d) (e)		85		144,854
Canva, Inc., Series A-3 (Acquired 11/04/21-12/17/21, Cost $17,043) (a) (c) (d) (e)		10		17,042
Databricks, Inc., Series G (Acquired 2/01/21, Cost $815,183) (a) (c) (d) (e)		4,596		930,322
Databricks, Inc., Series H (Acquired 8/31/21, Cost $2,202,319) (a) (c) (d) (e)		9,990		2,022,176
Gusto, Inc., Series E (Acquired 7/13/21, Cost $1,117,484) (a) (c) (d) (e)		36,765		1,117,484
				4,231,878
TOTAL PREFERRED STOCK (Cost $4,296,922)				4,231,878
TOTAL EQUITIES (Cost $2,241,383,860)				4,249,089,504
TOTAL LONG-TERM INVESTMENTS (Cost $2,241,383,860)				4,249,089,504
SHORT-TERM INVESTMENTS — 0.9%
Mutual Fund — 0.0%
T. Rowe Price Government Reserve Investment Fund		100		100
	Principal Amount
Repurchase Agreement — 0.9%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (f)	$	37,993,273		37,993,273
TOTAL SHORT-TERM INVESTMENTS (Cost $37,993,373)				37,993,373
TOTAL INVESTMENTS — 100.0% (Cost $2,279,377,233) (g)				4,287,082,877
Other Assets/(Liabilities) — (0.0)%				(1,290,080)
NET ASSETS — 100.0%			$	4,285,792,797

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 December 31, 2021, the aggregate market value of these securities amounted to $3,136,169 or 0.07% of net assets.

(c) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At December 31, 2021, these securities amounted to a value of $36,693,030 or 0.86% of net assets.

(d) Restricted security. Certain securities are restricted as to resale. At December 31, 2021, these securities amounted to a value of $36,693,030 or 0.86% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

(e) Investment was valued using significant unobservable inputs.

(f) Maturity value of $37,993,273. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $38,753,149.

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

MassMutual Growth Opportunities Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.5%
COMMON STOCK — 99.5%
Communications — 34.8%
Internet — 31.5%
Airbnb, Inc. Class A (a)		50,374	$	8,386,767
Amazon.com, Inc. (a)		9,904		33,023,303
DoorDash, Inc., Class A (a)		32,146		4,786,540
Fiverr International Ltd. (a) (b)		15,880		1,805,556
Match Group, Inc. (a)		124,596		16,477,821
Meta Platforms, Inc. Class A (a)		29,078		9,780,385
Netflix, Inc. (a)		37,267		22,451,132
Sea Ltd. ADR (a)		70,965		15,875,580
Shopify, Inc. Class A (a)		5,273		7,262,978
Uber Technologies, Inc. (a)		481,975		20,209,212
Wix.com Ltd. (a)		27,418		4,326,286
				144,385,560
Media — 3.3%
Charter Communications, Inc. Class A (a)		23,128		15,078,762
				159,464,322
Consumer, Cyclical — 4.7%
Apparel — 1.9%
NIKE, Inc. Class B		51,456		8,576,172
Entertainment — 1.1%
Warner Music Group Corp. Class A		113,577		4,904,255
Retail — 1.7%
Carvana Co. (a)		11,734		2,719,824
Floor & Decor Holdings, Inc. Class A (a)		40,441		5,257,734
				7,977,558
				21,457,985
Consumer, Non-cyclical — 19.6%
Commercial Services — 4.0%
Block, Inc. (a)		72,233		11,666,352
CoStar Group, Inc. (a)		81,944		6,476,034
				18,142,386
Health Care – Products — 9.8%
10X Genomics, Inc. Class A (a)		48,402		7,209,962
Align Technology, Inc. (a)		21,968		14,436,930
Edwards Lifesciences Corp. (a)		120,977		15,672,570

MassMutual Growth Opportunities Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Intuitive Surgical, Inc. (a)		21,283	$	7,646,982
				44,966,444
Health Care – Services — 1.9%
Catalent, Inc. (a)		69,865		8,944,816
Pharmaceuticals — 3.9%
DexCom, Inc. (a)		11,832		6,353,193
Sarepta Therapeutics, Inc. (a)		53,323		4,801,736
Zoetis, Inc.		26,838		6,549,277
				17,704,206
				89,757,852
Financial — 9.9%
Diversified Financial Services — 8.6%
Mastercard, Inc. Class A		35,927		12,909,289
Visa, Inc. Class A (b)		122,642		26,577,748
				39,487,037
Private Equity — 1.3%
KKR & Co., Inc.		78,679		5,861,586
				45,348,623
Industrial — 2.7%
Environmental Controls — 1.4%
Waste Management, Inc.		39,169		6,537,306
Transportation — 1.3%
Canadian Pacific Railway Ltd.		83,485		6,005,911
				12,543,217
Technology — 27.8%
Software — 27.8%
Adobe, Inc. (a)		7,954		4,510,395
Atlassian Corp. PLC Class A (a)		21,030		8,018,529
Cloudflare, Inc. Class A (a)		19,754		2,597,651
Coupa Software, Inc. (a)		32,074		5,069,296
Datadog, Inc. Class A (a)		47,366		8,436,358
Intuit, Inc.		16,159		10,393,792
Microsoft Corp.		75,564		25,413,685
ServiceNow, Inc. (a)		38,767		25,164,047
Snowflake, Inc. Class A (a)		40,055		13,568,631
Twilio, Inc. Class A (a)		64,533		16,994,120
Veeva Systems, Inc. Class A (a)		28,213		7,207,857

MassMutual Growth Opportunities Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
			$	127,374,361
TOTAL COMMON STOCK (Cost $292,197,270)				455,946,360
TOTAL EQUITIES (Cost $292,197,270)				455,946,360
TOTAL LONG-TERM INVESTMENTS (Cost $292,197,270)				455,946,360
	Principal Amount
SHORT-TERM INVESTMENTS — 2.1%
Repurchase Agreement — 2.1%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (c)	$	9,656,660		9,656,660
TOTAL SHORT-TERM INVESTMENTS (Cost $9,656,660)				9,656,660
TOTAL INVESTMENTS — 101.6% (Cost $301,853,930) (d)				465,603,020
Other Assets/(Liabilities) — (1.6)%				(7,453,432)
NET ASSETS — 100.0%			$	458,149,588

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 December 31, 2021, was $2,711,596 or 0.59% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $2,773,786 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 $9,656,660. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $9,849,881.

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

MassMutual Mid Cap Value Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 97.9%
COMMON STOCK — 97.9%
Basic Materials — 3.9%
Chemicals — 2.1%
Axalta Coating Systems Ltd. (a)		34,435	$	1,140,487
CF Industries Holdings, Inc.		10,632		752,533
LyondellBasell Industries NV Class A		7,491		690,895
Olin Corp.		706		40,609
				2,624,524
Forest Products & Paper — 1.2%
International Paper Co.		13,648		641,183
Mondi PLC		24,145		594,976
Sylvamo Corp. (a)		407		11,351
West Fraser Timber Co. Ltd.		3,000		286,080
				1,533,590
Iron & Steel — 0.3%
United States Steel Corp. (b)		12,800		304,768
Mining — 0.3%
Kinross Gold Corp.		64,100		372,421
				4,835,303
Communications — 6.6%
Advertising — 0.5%
The Interpublic Group of Cos., Inc.		17,731		664,026
Internet — 1.1%
eBay, Inc.		3,600		239,400
F5, Inc. (a)		1,800		440,478
GoDaddy, Inc. Class A (a)		804		68,227
IAC/InterActiveCorp (a)		4,600		601,266
Roku, Inc. (a)		44		10,041
				1,359,412
Media — 4.3%
Altice USA, Inc. Class A (a)		40,300		652,054
Discovery, Inc. Class C (a)		14,200		325,180
DISH Network Corp. Class A (a)		18,700		606,628
Fox Corp. Class A		16,100		594,090
Fox Corp. Class B		16,919		579,814
Liberty Broadband Corp. Class C (a)		5,800		934,380
Liberty Global PLC Class A (a)		19,600		543,704
Liberty Media Corp-Liberty SiriusXM Class C (a)		15,700		798,345
The New York Times Co. Class A		876		42,311

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

	Number of Shares		Value
News Corp. Class A		13,717	$	306,026
				5,382,532
Telecommunications — 0.7%
Ciena Corp. (a)		5,709		439,422
Corning, Inc.		2,941		109,494
Juniper Networks, Inc.		6,837		244,149
				793,065
				8,199,035
Consumer, Cyclical — 9.3%
Airlines — 0.6%
Southwest Airlines Co. (a)		18,156		777,803
Apparel — 0.7%
Columbia Sportswear Co.		199		19,391
Deckers Outdoor Corp. (a)		188		68,866
PVH Corp.		2,653		282,943
Tapestry, Inc.		13,342		541,685
				912,885
Auto Manufacturers — 0.7%
Cummins, Inc.		900		196,326
Honda Motor Co. Ltd. Sponsored ADR		7,195		204,698
PACCAR, Inc.		4,443		392,139
				793,163
Auto Parts & Equipment — 0.7%
BorgWarner, Inc.		13,575		611,825
Bridgestone Corp.		4,700		202,233
				814,058
Distribution & Wholesale — 0.7%
LKQ Corp.		10,600		636,318
W.W. Grainger, Inc.		538		278,813
				915,131
Food Services — 0.3%
Sodexo SA		4,760		417,377
Home Builders — 1.0%
NVR, Inc. (a)		100		590,887
PulteGroup, Inc.		10,802		617,442
				1,208,329
Home Furnishing — 0.2%
Dolby Laboratories, Inc. Class A		2,380		226,623
Tempur Sealy International, Inc.		458		21,540
				248,163
Leisure Time — 0.5%
Brunswick Corp.		2,979		300,075

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

	Number of Shares		Value
Polaris, Inc.		2,744	$	301,593
				601,668
Retail — 3.9%
Advance Auto Parts, Inc.		3,430		822,788
Bath & Body Works, Inc.		5,717		398,989
Beacon Roofing Supply, Inc. (a)		3,860		221,371
Cracker Barrel Old Country Store, Inc.		1,657		213,157
Dick's Sporting Goods, Inc. (b)		753		86,587
Dollar Tree, Inc. (a)		9,323		1,310,068
Kohl's Corp.		3,704		182,941
MSC Industrial Direct Co., Inc. Class A		7,517		631,879
O'Reilly Automotive, Inc. (a)		600		423,738
Ross Stores, Inc.		2,800		319,984
Victoria's Secret & Co. (a)		1,288		71,536
Williams-Sonoma, Inc.		1,226		207,353
				4,890,391
				11,578,968
Consumer, Non-cyclical — 19.1%
Agriculture — 0.6%
Archer-Daniels-Midland Co.		10,722		724,700
Beverages — 0.8%
Brown-Forman Corp. Class B		1,380		100,547
Molson Coors Beverage Co. Class B		18,268		846,721
				947,268
Biotechnology — 0.8%
Corteva, Inc.		15,730		743,715
Incyte Corp. (a)		1,815		133,221
Novavax, Inc. (a) (b)		90		12,876
United Therapeutics Corp. (a)		600		129,648
				1,019,460
Commercial Services — 1.5%
Euronet Worldwide, Inc. (a)		7,222		860,646
FleetCor Technologies, Inc. (a)		3,500		783,440
Gartner, Inc. (a)		77		25,742
ManpowerGroup, Inc.		2,187		212,861
Morningstar, Inc.		84		28,727
				1,911,416
Food — 4.1%
Conagra Brands, Inc.		25,535		872,020
General Mills, Inc.		4,682		315,473
The J.M. Smucker Co.		2,455		333,438
Kellogg Co.		4,277		275,524
Koninklijke Ahold Delhaize NV		17,603		603,163
The Kraft Heinz Co.		19,300		692,870
Orkla ASA		32,260		323,453
Post Holdings, Inc. (a)		11,900		1,341,487

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

	Number of Shares		Value
Sysco Corp.		3,972	$	312,001
				5,069,429
Health Care – Products — 3.0%
Bruker Corp.		173		14,516
Envista Holdings Corp. (a)		8,658		390,130
Globus Medical, Inc. Class A (a)		377		27,219
Henry Schein, Inc. (a)		8,686		673,426
Hologic, Inc. (a)		9,049		692,791
Koninklijke Philips NV		7,248		267,089
PerkinElmer, Inc.		1,732		348,236
Zimmer Biomet Holdings, Inc.		10,265		1,304,066
				3,717,473
Health Care – Services — 3.1%
Centene Corp. (a)		13,387		1,103,089
Laboratory Corp. of America Holdings (a)		4,455		1,399,805
Quest Diagnostics, Inc.		3,779		653,805
Universal Health Services, Inc. Class B		5,670		735,172
				3,891,871
Household Products & Wares — 0.6%
Avery Dennison Corp.		204		44,180
The Clorox Co.		1,613		281,243
Kimberly-Clark Corp.		3,291		470,350
				795,773
Pharmaceuticals — 4.6%
AmerisourceBergen Corp.		9,761		1,297,139
Becton Dickinson and Co.		1,781		447,886
Cardinal Health, Inc.		9,087		467,890
Herbalife Nutrition Ltd. (a)		355		14,530
Jazz Pharmaceuticals PLC (a)		2,946		375,320
McKesson Corp.		5,984		1,487,443
Organon & Co.		23,330		710,399
Perrigo Co. PLC		8,200		318,980
Viatris, Inc.		43,600		589,908
				5,709,495
				23,786,885
Energy — 5.0%
Oil & Gas — 3.4%
APA Corp.		14,261		383,478
Chesapeake Energy Corp.		3,600		232,272
ConocoPhillips		8,139		587,473
Devon Energy Corp.		21,320		939,146
DTE Midstream LLC (a)		501		24,038
EQT Corp. (a)		15,600		340,236
Hess Corp.		5,149		381,180
HollyFrontier Corp.		16,900		553,982
Marathon Oil Corp.		27,707		454,949

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

	Number of Shares		Value
Pioneer Natural Resources Co.		2,054	$	373,582
				4,270,336
Oil & Gas Services — 0.6%
Baker Hughes Co.		30,495		733,710
Pipelines — 1.0%
Targa Resources Corp.		8,395		438,555
The Williams Cos., Inc.		31,100		809,844
				1,248,399
				6,252,445
Financial — 24.2%
Banks — 6.2%
The Bank of New York Mellon Corp.		14,165		822,703
CIT Group, Inc.		11,200		575,008
Comerica, Inc.		4,250		369,750
Commerce Bancshares, Inc.		1,059		72,796
First Hawaiian, Inc.		12,838		350,863
KeyCorp.		33,807		781,956
M&T Bank Corp.		3,195		490,688
Northern Trust Corp.		8,438		1,009,269
Prosperity Bancshares, Inc.		5,846		422,666
Regions Financial Corp.		30,389		662,480
State Street Corp.		10,403		967,479
Synovus Financial Corp.		5,523		264,386
Truist Financial Corp.		11,171		654,062
Webster Financial Corp.		478		26,691
Westamerica Bancorp.		4,195		242,177
Wintrust Financial Corp.		301		27,337
				7,740,311
Diversified Financial Services — 2.6%
AerCap Holdings NV (a)		3,600		235,512
Affiliated Managers Group, Inc.		1,872		307,963
Alliance Data Systems Corp.		276		18,373
Ally Financial, Inc.		13,400		637,974
Ameriprise Financial, Inc.		1,458		439,820
Cboe Global Markets, Inc.		3,600		469,440
Discover Financial Services		5,091		588,316
Janus Henderson Group PLC		907		38,040
SLM Corp.		1,603		31,531
T. Rowe Price Group, Inc.		2,474		486,487
				3,253,456
Insurance — 8.7%
Aflac, Inc.		12,302		718,314
Alleghany Corp. (a)		1,500		1,001,385
The Allstate Corp.		10,192		1,199,089
American International Group, Inc.		6,700		380,962
Arch Capital Group Ltd. (a)		24,100		1,071,245
Arthur J Gallagher & Co.		977		165,768
Chubb Ltd.		3,324		642,562
Fidelity National Financial, Inc.		19,000		991,420

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

	Number of Shares		Value
First American Financial Corp.		2,324	$	181,807
The Hartford Financial Services Group, Inc.		10,556		728,786
Loews Corp.		15,900		918,384
Markel Corp. (a)		700		863,800
Old Republic International Corp.		18,300		449,814
The Progressive Corp.		2,234		229,320
Reinsurance Group of America, Inc.		9,657		1,057,345
Unum Group		7,341		180,368
				10,780,369
Private Equity — 0.7%
KKR & Co., Inc.		10,725		799,012
Real Estate — 0.6%
CBRE Group, Inc. Class A (a)		6,910		749,804
Jones Lang LaSalle, Inc. (a)		175		47,135
				796,939
Real Estate Investment Trusts (REITS) — 5.3%
Annaly Capital Management, Inc.		78,500		613,870
Duke Realty Corp.		13,106		860,278
Equinix, Inc.		437		369,632
Essex Property Trust, Inc.		1,154		406,473
Gaming and Leisure Properties, Inc.		9,600		467,136
Healthcare Trust of America, Inc. Class A		13,372		446,491
Healthpeak Properties, Inc.		16,136		582,348
JBG SMITH Properties		33,263		954,981
MGM Growth Properties LLC Class A		10,897		445,143
Regency Centers Corp.		5,251		395,663
Weyerhaeuser Co.		24,011		988,773
				6,530,788
Savings & Loans — 0.1%
Capitol Federal Financial, Inc.		15,292		173,258
				30,074,133
Industrial — 12.3%
Aerospace & Defense — 0.8%
BAE Systems PLC		58,626		436,840
General Dynamics Corp.		2,742		571,625
				1,008,465
Building Materials — 1.5%
Fortune Brands Home & Security, Inc.		6,261		669,301
Louisiana-Pacific Corp.		463		36,276
Masco Corp.		9,409		660,700
Owens Corning		5,180		468,790
				1,835,067
Electrical Components & Equipment — 0.6%
Acuity Brands, Inc.		186		39,380
Emerson Electric Co.		8,030		746,549
				785,929

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

	Number of Shares		Value
Electronics — 3.1%
Flex Ltd. (a)		29,800	$	546,234
Garmin Ltd.		4,311		587,029
Hubbell, Inc.		1,145		238,469
nVent Electric PLC		22,816		867,008
Trimble, Inc. (a)		8,079		704,408
Vontier Corp.		30,002		921,962
				3,865,110
Environmental Controls — 0.3%
Clean Harbors, Inc. (a)		1,945		194,053
Republic Services, Inc.		1,628		227,024
				421,077
Hand & Machine Tools — 0.4%
Snap-on, Inc.		2,011		433,129
Machinery – Construction & Mining — 0.5%
Oshkosh Corp.		6,025		679,078
Machinery – Diversified — 0.6%
Dover Corp.		4,054		736,206
IMI PLC		1,217		28,524
				764,730
Miscellaneous - Manufacturing — 0.8%
A.O. Smith Corp.		703		60,353
Axon Enterprise, Inc. (a)		95		14,915
Textron, Inc.		9,022		696,498
Trane Technologies PLC		965		194,959
				966,725
Packaging & Containers — 2.8%
Amcor PLC		13,518		162,351
Berry Global Group, Inc. (a)		4,000		295,120
Graphic Packaging Holding Co.		34,900		680,550
Packaging Corp. of America		3,133		426,558
Sealed Air Corp.		9,000		607,230
Sonoco Products Co.		12,854		744,118
WestRock Co.		12,681		562,529
				3,478,456
Shipbuilding — 0.5%
Huntington Ingalls Industries, Inc.		3,100		578,894
Transportation — 0.4%
Heartland Express, Inc.		16,793		282,458
Ryder System, Inc.		1,979		163,129
				445,587
				15,262,247

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

	Number of Shares		Value
Technology — 7.4%
Computers — 1.8%
Amdocs Ltd.		3,773	$	282,371
Fortinet, Inc. (a)		76		27,314
HP, Inc.		26,707		1,006,053
Lumentum Holdings, Inc. (a)		2,661		281,454
NCR Corp. (a)		5,700		229,140
NetApp, Inc.		385		35,416
Western Digital Corp. (a)		6,400		417,344
				2,279,092
Semiconductors — 0.6%
Cirrus Logic, Inc. (a)		2,182		200,788
Qorvo, Inc. (a)		3,939		616,020
				816,808
Software — 5.0%
Akamai Technologies, Inc. (a)		4,096		479,396
ANSYS, Inc. (a)		495		198,554
Cadence Design Systems, Inc. (a)		106		19,753
CDK Global, Inc.		25,885		1,080,440
Cerner Corp.		19,950		1,852,756
DocuSign, Inc. (a)		61		9,291
Dropbox, Inc. Class A (a)		736		18,061
HubSpot, Inc. (a)		30		19,775
Manhattan Associates, Inc. (a)		229		35,607
Open Text Corp.		9,266		439,950
SS&C Technologies Holdings, Inc		7,500		614,850
Synopsys, Inc. (a)		1,975		727,788
Take-Two Interactive Software, Inc. (a)		3,733		663,429
Teradata Corp. (a)		409		17,370
				6,177,020
				9,272,920
Utilities — 10.1%
Electric — 8.2%
CenterPoint Energy, Inc.		42,886		1,196,948
DTE Energy Co.		1,671		199,751
Edison International		11,994		818,591
Entergy Corp.		6,674		751,826
Evergy, Inc.		17,289		1,186,198
Eversource Energy		11,882		1,081,024
NorthWestern Corp. (b)		10,504		600,409
OGE Energy Corp.		26,100		1,001,718
Pinnacle West Capital Corp.		8,869		626,063
Vistra Corp.		43,700		995,049
WEC Energy Group, Inc.		7,699		747,342
Xcel Energy, Inc.		14,687		994,310
				10,199,229
Gas — 1.9%
Atmos Energy Corp.		3,743		392,154
NiSource, Inc.		36,000		993,960

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

	Number of Shares		Value
Spire, Inc.		4,386	$	286,055
UGI Corp.		16,500		757,515
				2,429,684
				12,628,913
TOTAL COMMON STOCK (Cost $110,920,485)				121,890,849
TOTAL EQUITIES (Cost $110,920,485)				121,890,849
MUTUAL FUNDS — 0.0%
Diversified Financial Services — 0.0%
State Street Navigator Securities Lending Government Money Market Portfolio (c)		12,994		12,994
TOTAL MUTUAL FUNDS (Cost $12,994)				12,994
TOTAL LONG-TERM INVESTMENTS (Cost $110,933,479)				121,903,843
	Principal Amount
SHORT-TERM INVESTMENTS — 0.8%
Repurchase Agreement — 0.8%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (d)	$	960,825		960,825
TOTAL SHORT-TERM INVESTMENTS (Cost $960,825)				960,825
TOTAL INVESTMENTS — 98.7% (Cost $111,894,304) (e)				122,864,668
Other Assets/(Liabilities) — 1.3%				1,584,826
NET ASSETS — 100.0%			$	124,449,494

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 December 31, 2021, was $987,589 or 0.79% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $996,248 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 $960,825. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $980,078.

(e) 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.	3/31/22	JPY	1,444,645	USD	$12,718	$	(149)
Bank of America N.A.	3/31/22	USD	364,360	JPY	41,360,065		4,524
Credit Suisse International	3/31/22	USD	1,100,614	EUR	971,876		(7,888)
JP Morgan Chase Bank N.A.	3/31/22	USD	885,340	GBP	669,273		(20,207)
UBS AG*	3/31/22	USD	267,612	NOK	2,420,726		(6,820)
						$	(30,540)

Currency Legend

EUR Euro

GBP British Pound

JPY Japanese Yen

NOK Norwegian Krone

USD U.S. Dollar

MassMutual Small Cap Value Equity Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 97.6%
COMMON STOCK — 97.6%
Basic Materials — 5.3%
Chemicals — 2.8%
Axalta Coating Systems Ltd. (a)		11,761	$	389,524
Element Solutions, Inc.		28,698		696,787
H.B. Fuller Co.		4,345		351,945
Orion Engineered Carbons SA (a)		21,768		399,661
				1,837,917
Forest Products & Paper — 0.7%
Neenah, Inc.		10,211		472,565
Iron & Steel — 1.3%
Allegheny Technologies, Inc. (a)		55,509		884,258
Mining — 0.5%
Ferroglobe PLC (a)		47,521		295,106
Ferroglobe Representation & Warranty Insurance Trust (b) (c)		234,800		—
				295,106
				3,489,846
Communications — 3.0%
Media — 0.6%
WideOpenWest, Inc. (a)		19,126		411,591
Telecommunications — 2.4%
Ciena Corp. (a)		10,426		802,489
Infinera Corp. (a) (d)		81,743		783,916
				1,586,405
				1,997,996
Consumer, Cyclical — 10.5%
Apparel — 0.8%
Kontoor Brands, Inc.		9,800		502,250
Auto Parts & Equipment — 5.0%
Adient PLC (a)		25,412		1,216,726
American Axle & Manufacturing Holdings, Inc. (a)		82,952		773,942
Gentherm, Inc. (a)		10,032		871,781
Visteon Corp. (a)		3,898		433,224
				3,295,673

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

	Number of Shares		Value
Food Services — 0.9%
Aramark		15,930	$	587,021
Home Builders — 0.7%
TRI Pointe Group, Inc. (a)		17,879		498,645
Home Furnishing — 1.0%
Whirlpool Corp.		2,964		695,532
Lodging — 0.5%
Wyndham Hotels & Resorts, Inc.		3,377		302,748
Office Furnishings — 1.1%
Interface, Inc.		47,378		755,679
Textiles — 0.5%
UniFirst Corp.		1,674		352,210
				6,989,758
Consumer, Non-cyclical — 13.9%
Agriculture — 1.6%
Darling Ingredients, Inc. (a)		15,252		1,056,811
Beverages — 0.4%
C&C Group PLC (a)		83,931		263,220
Commercial Services — 3.1%
BrightView Holdings, Inc. (a)		19,665		276,883
CBIZ, Inc. (a)		10,844		424,217
Huron Consulting Group, Inc. (a)		10,895		543,661
ICF International, Inc.		4,297		440,657
Monro, Inc.		6,774		394,721
				2,080,139
Food — 2.2%
Cranswick PLC		7,019		351,366
Hostess Brands, Inc. (a)		17,889		365,293
Post Holdings, Inc. (a)		3,465		390,610
SunOpta, Inc. (a)		51,325		356,709
				1,463,978
Health Care – Products — 2.0%
Apria, Inc. (a)		8,531		278,110
Haemonetics Corp. (a)		9,849		522,391
ICU Medical, Inc. (a)		755		179,192
Invacare Corp. (a)		15,235		41,439
Lantheus Holdings, Inc. (a)		10,657		307,881
				1,329,013
Health Care – Services — 2.0%
Encompass Health Corp.		6,980		455,515
LHC Group, Inc. (a)		1,000		137,230
MEDNAX, Inc. (a)		15,127		411,606
Syneos Health, Inc. (a)		2,934		301,263
				1,305,614

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

	Number of Shares		Value
Household Products & Wares — 1.8%
ACCO Brands Corp.		42,235	$	348,861
Spectrum Brands Holdings, Inc.		7,969		810,607
				1,159,468
Pharmaceuticals — 0.8%
Owens & Minor, Inc.		12,650		550,275
				9,208,518
Energy — 0.8%
Oil & Gas — 0.4%
Chesapeake Energy Corp.		4,216		272,017
Oil & Gas Services — 0.4%
NOW, Inc. (a)		27,706		236,609
				508,626
Financial — 26.4%
Banks — 12.6%
1st Source Corp.		4,752		235,699
Atlantic Union Bankshares Corp.		8,463		315,585
Cadence Bank		12,471		371,511
Eastern Bankshares, Inc.		14,876		300,049
First Citizens BancShares, Inc. Class A		511		424,048
First Midwest Bancorp, Inc.		14,483		296,612
Great Western Bancorp, Inc.		10,229		347,377
Hancock Whitney Corp.		10,311		515,756
International Bancshares Corp.		9,854		417,711
OFG Bancorp		36,949		981,366
Old National Bancorp		39,462		715,052
Prosperity Bancshares, Inc.		9,817		709,769
Synovus Financial Corp.		10,517		503,449
Texas Capital Bancshares, Inc. (a)		16,684		1,005,211
Umpqua Holdings Corp.		42,899		825,377
Webster Financial Corp.		6,766		377,813
				8,342,385
Diversified Financial Services — 0.5%
Air Lease Corp.		8,154		360,651
Insurance — 6.9%
Alleghany Corp. (a)		964		643,557
Argo Group International Holdings Ltd.		4,816		279,858
Assured Guaranty Ltd.		6,256		314,051
Kemper Corp.		8,006		470,673
MGIC Investment Corp.		65,546		945,173
NMI Holdings, Inc. Class A (a)		15,747		344,072
ProAssurance Corp.		14,348		363,004
Reinsurance Group of America, Inc.		2,984		326,718
SiriusPoint Ltd. (a)		36,316		295,249
White Mountains Insurance Group Ltd.		560		567,784
				4,550,139

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

	Number of Shares		Value
Real Estate — 0.7%
Alexander & Baldwin, Inc.		18,562	$	465,721
Real Estate Investment Trusts (REITS) — 4.5%
Brandywine Realty Trust		28,763		385,999
Centerspace		3,051		338,356
Corporate Office Properties Trust		8,447		236,263
LXP Industrial Trust		21,183		330,878
Physicians Realty Trust		22,732		428,044
Piedmont Office Realty Trust, Inc. Class A		22,779		418,678
PotlatchDeltic Corp.		5,205		313,445
RPT Realty		37,692		504,319
				2,955,982
Savings & Loans — 1.2%
Banc of California, Inc.		26,361		517,203
Northwest Bancshares, Inc.		19,784		280,141
				797,344
				17,472,222
Industrial — 25.3%
Aerospace & Defense — 0.6%
Hexcel Corp. (a)		7,328		379,591
Building Materials — 5.0%
American Woodmark Corp. (a)		5,343		348,364
Apogee Enterprises, Inc.		19,713		949,181
Cornerstone Building Brands, Inc. (a)		53,494		932,935
Gibraltar Industries, Inc. (a)		7,940		529,439
Tyman PLC		105,578		571,927
				3,331,846
Electrical Components & Equipment — 1.9%
Belden, Inc.		8,547		561,794
Encore Wire Corp.		5,005		716,216
				1,278,010
Electronics — 2.3%
FARO Technologies, Inc. (a)		8,671		607,143
II-VI, Inc. (a)		9,974		681,524
Vishay Precision Group, Inc. (a)		7,225		268,192
				1,556,859
Engineering & Construction — 1.9%
Primoris Services Corp.		12,978		311,212
WillScot Mobile Mini Holdings Corp. (a)		23,534		961,129
				1,272,341
Environmental Controls — 2.0%
Clean Harbors, Inc. (a)		3,821		381,221

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

	Number of Shares		Value
Harsco Corp. (a)		55,508	$	927,539
				1,308,760
Hand & Machine Tools — 1.4%
Kennametal, Inc.		17,678		634,817
Luxfer Holdings PLC		17,301		334,082
				968,899
Machinery – Diversified — 0.6%
Albany International Corp. Class A		1,419		125,510
Thermon Group Holdings, Inc. (a)		14,620		247,517
				373,027
Metal Fabricate & Hardware — 0.8%
Standex International Corp.		4,780		528,955
Miscellaneous - Manufacturing — 1.5%
Enerpac Tool Group Corp.		23,040		467,251
Materion Corp.		5,534		508,796
				976,047
Packaging & Containers — 2.3%
Sealed Air Corp.		10,714		722,874
TriMas Corp.		20,981		776,297
				1,499,171
Transportation — 3.1%
Air Transport Services Group, Inc. (a)		34,861		1,024,216
Dorian LPG Ltd.		17,740		225,121
Kirby Corp. (a)		13,230		786,126
				2,035,463
Trucking & Leasing — 1.9%
GATX Corp.		4,010		417,802
The Greenbrier Cos., Inc.		18,588		853,003
				1,270,805
				16,779,774
Technology — 9.8%
Computers — 1.7%
Exlservice Holdings, Inc. (a)		1,868		270,430
Science Applications International Corp.		5,844		488,500
WNS Holdings Ltd. ADR (a)		4,326		381,640
				1,140,570
Semiconductors — 5.6%
Azenta, Inc.		8,918		919,535
Cohu, Inc. (a)		21,449		816,992
CTS Corp.		11,226		412,219
Diodes, Inc. (a)		9,056		994,439

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

	Number of Shares		Value
Photronics, Inc. (a)		31,362	$	591,174
				3,734,359
Software — 2.5%
ACI Worldwide, Inc. (a)		9,913		343,981
Allscripts Healthcare Solutions, Inc. (a)		19,082		352,063
CDK Global, Inc.		12,971		541,410
Progress Software Corp.		8,224		396,972
				1,634,426
				6,509,355
Utilities — 2.6%
Electric — 0.8%
Portland General Electric Co.		10,489		555,078
Gas — 1.8%
New Jersey Resources Corp.		8,233		338,047
Spire, Inc.		4,778		311,621
UGI Corp.		11,315		519,472
				1,169,140
				1,724,218
TOTAL COMMON STOCK (Cost $46,371,980)				64,680,313
TOTAL EQUITIES (Cost $46,371,980)				64,680,313
MUTUAL FUNDS — 0.5%
Diversified Financial Services — 0.5%
State Street Navigator Securities Lending Government Money Market Portfolio (e)		340,620		340,620
TOTAL MUTUAL FUNDS (Cost $340,620)				340,620
TOTAL LONG-TERM INVESTMENTS (Cost $46,712,600)				65,020,933
	Principal Amount
SHORT-TERM INVESTMENTS — 3.0%
Repurchase Agreement — 3.0%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (f)	$	1,992,564		1,992,564
TOTAL SHORT-TERM INVESTMENTS (Cost $1,992,564)				1,992,564

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

	Principal Amount	Value
TOTAL INVESTMENTS — 101.1% (Cost $48,705,164) (g)		$	67,013,497
Other Assets/(Liabilities) — (1.1)%			(747,805)
NET ASSETS — 100.0%		$	66,265,692

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) Investment was valued using significant unobservable inputs.

(c) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At December 31, 2021, these securities amounted to a value of $0 or 0.00% of net assets.

(d) Denotes all or a portion of security on loan. The total value of securities on loan as of December 31, 2021, was $326,655 or 0.49% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. (Note 2).

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

(f) Maturity value of $1,992,564. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $2,032,433.

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

MassMutual Small Company Value Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.8%
COMMON STOCK — 99.8%
Basic Materials — 4.9%
Chemicals — 3.5%
AdvanSix, Inc.		41,760	$	1,973,160
GCP Applied Technologies, Inc. (a)		5,906		186,984
H.B. Fuller Co.		33,440		2,708,640
Innospec, Inc.		14,530		1,312,640
Minerals Technologies, Inc.		12,980		949,487
Orion Engineered Carbons SA (a)		107,408		1,972,011
Trinseo PLC		23,259		1,220,167
				10,323,089
Iron & Steel — 1.4%
Carpenter Technology Corp.		62,898		1,835,993
Commercial Metals Co.		34,070		1,236,400
Schnitzer Steel Industries, Inc. Class A		20,710		1,075,263
				4,147,656
Mining — 0.0%
Ferroglobe Representation & Warranty Insurance Trust (a) (b) (c)		49,975		—
				14,470,745
Communications — 3.6%
Internet — 1.0%
Criteo SA Sponsored ADR (a)		70,301		2,732,600
Solo Brands, Inc. Class A (a) (d)		12,780		199,751
				2,932,351
Media — 1.2%
Entravision Communications Corp. Class A		109,345		741,359
Houghton Mifflin Harcourt Co. (a)		159,202		2,563,152
Townsquare Media, Inc. Class A (a)		11,505		153,362
				3,457,873
Telecommunications — 1.4%
A10 Networks, Inc.		171,219		2,838,811
Casa Systems, Inc. (a)		243,830		1,382,516
				4,221,327
				10,611,551

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

	Number of Shares		Value
Consumer, Cyclical — 21.7%
Airlines — 0.8%
SkyWest, Inc. (a)		56,276	$	2,211,647
Apparel — 1.3%
Kontoor Brands, Inc.		41,740		2,139,175
Tapestry, Inc.		38,954		1,581,532
				3,720,707
Auto Manufacturers — 1.2%
Blue Bird Corp. (a) (d)		102,919		1,609,653
REV Group, Inc.		135,100		1,911,665
				3,521,318
Auto Parts & Equipment — 3.1%
Dana, Inc.		86,936		1,983,880
The Goodyear Tire & Rubber Co. (a)		189,150		4,032,678
The Shyft Group, Inc.		64,718		3,179,595
				9,196,153
Distribution & Wholesale — 1.1%
A-Mark Precious Metals, Inc.		6,241		381,325
H&E Equipment Services, Inc.		42,608		1,886,256
KAR Auction Services, Inc. (a)		65,423		1,021,908
				3,289,489
Entertainment — 1.8%
Accel Entertainment, Inc. (a)		55,514		722,792
IMAX Corp. (a)		142,380		2,540,059
Penn National Gaming, Inc. (a)		6,780		351,543
Scientific Games Corp. Class A (a)		24,230		1,619,291
				5,233,685
Food Services — 0.1%
Healthcare Services Group, Inc.		19,984		355,515
Home Builders — 2.6%
KB Home		66,520		2,975,440
Skyline Champion Corp. (a)		15,793		1,247,331
Taylor Morrison Home Corp. (a)		97,069		3,393,532
				7,616,303
Home Furnishing — 0.9%
MillerKnoll, Inc.		68,840		2,697,840
Leisure Time — 1.6%
Brunswick Corp.		16,382		1,650,159
Malibu Boats, Inc. Class A (a)		28,277		1,943,478
OneWater Marine, Inc. Class A		18,826		1,147,821
				4,741,458
Lodging — 0.7%
Hilton Grand Vacations, Inc. (a)		40,370		2,103,681

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

	Number of Shares		Value
Retail — 6.3%
Beacon Roofing Supply, Inc. (a)		25,795	$	1,479,343
BJ's Restaurants, Inc. (a)		10,784		372,587
Dave & Buster's Entertainment, Inc. (a)		34,032		1,306,829
Dine Brands Global, Inc.		28,730		2,178,021
Genesco, Inc. (a)		31,560		2,025,205
GMS, Inc. (a)		13,621		818,759
MarineMax, Inc. (a)		23,221		1,370,968
Papa John's International, Inc.		19,340		2,581,310
Penske Automotive Group, Inc.		19,319		2,071,383
Red Robin Gourmet Burgers, Inc. (a)		28,848		476,858
Ruth's Hospitality Group, Inc. (a)		98,827		1,966,657
Sally Beauty Holdings, Inc. (a)		109,630		2,023,770
				18,671,690
Textiles — 0.2%
Mohawk Industries, Inc. (a)		3,052		556,013
				63,915,499
Consumer, Non-cyclical — 12.1%
Commercial Services — 5.1%
AMN Healthcare Services, Inc. (a)		3,801		464,976
Barrett Business Services, Inc.		5,707		394,126
The Brink's Co.		25,725		1,686,788
Deluxe Corp.		34,703		1,114,313
Euronet Worldwide, Inc. (a)		7,331		873,635
EVERTEC, Inc.		42,040		2,101,159
Herc Holdings, Inc.		20,674		3,236,515
Korn Ferry		50,560		3,828,909
Loomis AB		24,917		663,700
Viad Corp. (a)		16,420		702,612
				15,066,733
Cosmetics & Personal Care — 0.6%
Edgewell Personal Care Co.		38,630		1,765,777
The Honest Co., Inc. (a)		12,015		97,201
				1,862,978
Food — 1.9%
The Hain Celestial Group, Inc. (a)		67,434		2,873,363
Nomad Foods Ltd. (a)		111,508		2,831,188
				5,704,551
Health Care – Products — 1.2%
Apria, Inc. (a)		24,392		795,179
Integra LifeSciences Holdings Corp. (a)		38,370		2,570,407
Varex Imaging Corp. (a)		7,475		235,836
				3,601,422
Health Care – Services — 2.1%
Acadia Healthcare Co., Inc. (a)		40,460		2,455,922
MEDNAX, Inc. (a)		118,960		3,236,902

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

	Number of Shares		Value
National HealthCare Corp.		5,044	$	342,689
				6,035,513
Household Products & Wares — 0.9%
Spectrum Brands Holdings, Inc.		24,864		2,529,166
Pharmaceuticals — 0.3%
Patterson Cos., Inc.		33,322		978,001
				35,778,364
Energy — 1.7%
Energy – Alternate Sources — 0.3%
Enviva Partners LP (e)		10,103		711,453
Oil & Gas — 1.1%
Coterra Energy, Inc.		60,209		1,143,971
Earthstone Energy, Inc. Class A (a)		19,209		210,146
HollyFrontier Corp.		58,120		1,905,174
				3,259,291
Oil & Gas Services — 0.3%
ChampionX Corp. (a)		44,149		892,252
NCS Multistage Holdings, Inc. (a)		1,061		30,769
				923,021
				4,893,765
Financial — 32.2%
Banks — 16.0%
1st Source Corp.		36,868		1,828,653
Ameris Bancorp		20,420		1,014,466
Associated Banc-Corp.		74,699		1,687,450
Bank of Marin Bancorp		33,156		1,234,398
BankUnited, Inc.		94,989		4,018,985
Carter Bankshares, Inc. (a)		92,835		1,428,731
CVB Financial Corp.		22,185		474,981
F.N.B. Corp.		107,237		1,300,785
First BanCorp		70,306		968,817
First Hawaiian, Inc.		11,752		321,182
First Mid Bancshares, Inc.		4,801		205,435
HarborOne Bancorp, Inc.		162,807		2,416,056
Heritage Financial Corp.		74,682		1,825,228
Home BancShares, Inc.		41,364		1,007,213
Independent Bank Corp.		6,751		550,409
Independent Bank Group, Inc.		47,004		3,391,339
Old National Bancorp		75,838		1,374,184
Origin Bancorp, Inc.		10,070		432,204
Premier Financial Corp.		55,944		1,729,229
QCR Holdings, Inc.		4,968		278,208
Renasant Corp.		5,994		227,472
Sandy Spring Bancorp, Inc.		37,159		1,786,605
SouthState Corp.		20,678		1,656,515
Synovus Financial Corp.		49,077		2,349,316
Texas Capital Bancshares, Inc. (a)		44,300		2,669,075
Towne Bank		11,415		360,600

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

	Number of Shares		Value
TriCo Bancshares		41,426	$	1,779,661
UMB Financial Corp.		15,092		1,601,412
Umpqua Holdings Corp.		110,564		2,127,251
Valley National Bancorp		136,872		1,881,990
Veritex Holdings, Inc.		13,282		528,358
Webster Financial Corp.		46,572		2,600,580
				47,056,788
Diversified Financial Services — 1.8%
Enact Holdings, Inc.		17,281		357,198
Moelis & Co. Class A		42,661		2,666,739
Stifel Financial Corp.		32,005		2,253,792
				5,277,729
Insurance — 2.5%
Axis Capital Holdings Ltd.		28,300		1,541,501
The Hanover Insurance Group, Inc.		17,560		2,301,414
James River Group Holdings Ltd.		10,114		291,384
ProAssurance Corp.		24,479		619,319
Selective Insurance Group, Inc.		32,152		2,634,535
				7,388,153
Investment Companies — 0.7%
Compass Diversified Holdings (e)		65,888		2,014,855
Private Equity — 0.1%
Patria Investments Ltd.		11,053		179,059
Real Estate Investment Trusts (REITS) — 8.2%
Armada Hoffler Properties, Inc.		64,365		979,635
Brandywine Realty Trust		65,629		880,741
Broadstone Net Lease, Inc.		65,820		1,633,652
CareTrust REIT, Inc.		24,663		563,056
Cousins Properties, Inc.		64,163		2,584,486
Easterly Government Properties, Inc.		16,008		366,903
Four Corners Property Trust, Inc.		26,024		765,366
Getty Realty Corp.		11,999		385,048
Healthcare Realty Trust, Inc.		8,532		269,952
Highwoods Properties, Inc.		7,614		339,508
Independence Realty Trust, Inc.		144,710		3,737,859
Kite Realty Group Trust		20,146		438,780
National Health Investors, Inc.		7,784		447,347
National Storage Affiliates Trust		32,094		2,220,905
NETSTREIT Corp.		76,460		1,750,934
Physicians Realty Trust		172,164		3,241,848
Sabra Health Care REIT, Inc.		14,716		199,255
STAG Industrial, Inc.		68,828		3,300,991
Summit Hotel Properties, Inc. (a)		20,647		201,515
				24,307,781
Savings & Loans — 2.9%
Berkshire Hills Bancorp, Inc.		95,200		2,706,536
Pacific Premier Bancorp, Inc.		76,360		3,056,691
Provident Financial Services, Inc.		16,559		401,059

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

	Number of Shares		Value
WSFS Financial Corp.		51,116	$	2,561,934
				8,726,220
				94,950,585
Industrial — 16.1%
Building Materials — 1.4%
Cornerstone Building Brands, Inc. (a)		59,770		1,042,389
Masonite International Corp. (a)		19,337		2,280,799
Tecnoglass, Inc. (d)		27,301		715,013
				4,038,201
Electrical Components & Equipment — 1.0%
Belden, Inc.		42,685		2,805,685
Graham Corp.		12,497		155,463
				2,961,148
Electronics — 2.2%
Advanced Energy Industries, Inc.		4,369		397,841
Avnet, Inc.		40,372		1,664,538
Cadre Holdings, Inc. (a)		5,006		127,252
Coherent, Inc. (a)		5,537		1,475,832
II-VI, Inc. (a)		35,584		2,431,455
Vontier Corp.		13,553		416,484
				6,513,402
Engineering & Construction — 2.2%
Arcosa, Inc.		10,905		574,693
Dycom Industries, Inc. (a)		40,792		3,824,658
Great Lakes Dredge & Dock Corp. (a)		141,990		2,232,083
				6,631,434
Environmental Controls — 0.1%
CECO Environmental Corp. (a)		28,207		175,730
Charah Solutions, Inc. (a) (d)		33,036		156,260
				331,990
Hand & Machine Tools — 0.7%
Luxfer Holdings PLC		10,822		208,973
Regal Rexnord Corp.		10,350		1,761,363
				1,970,336
Machinery – Construction & Mining — 1.3%
The Manitowoc Co., Inc. (a)		99,680		1,853,051
Terex Corp.		46,069		2,024,732
				3,877,783
Machinery – Diversified — 3.2%
Albany International Corp. Class A		5,140		454,633
Applied Industrial Technologies, Inc.		17,260		1,772,602
Cactus, Inc. Class A		79,840		3,044,299
Colfax Corp. (a)		29,259		1,345,036

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

	Number of Shares		Value
Crane Co.		11,399	$	1,159,620
DXP Enterprises, Inc. (a)		18,565		476,564
Gates Industrial Corp. PLC (a)		70,252		1,117,710
				9,370,464
Metal Fabricate & Hardware — 0.7%
The Timken Co.		28,649		1,985,089
Miscellaneous - Manufacturing — 0.2%
DIRTT Environmental Solutions (a) (d)		61,401		133,854
EnPro Industries, Inc.		3,625		399,004
				532,858
Packaging & Containers — 1.1%
Graphic Packaging Holding Co.		108,236		2,110,602
Karat Packaging, Inc. (a)		6,044		122,149
Pactiv Evergreen, Inc.		76,281		967,243
				3,199,994
Transportation — 1.4%
ArcBest Corp.		33,430		4,006,585
Trucking & Leasing — 0.6%
GATX Corp.		18,200		1,896,258
				47,315,542
Technology — 5.7%
Computers — 0.9%
KBR, Inc.		16,939		806,635
Unisys Corp. (a)		83,572		1,719,076
				2,525,711
Semiconductors — 1.9%
Cohu, Inc. (a)		9,540		363,379
Kulicke & Soffa Industries, Inc.		49,970		3,025,184
Magnachip Semiconductor Corp. (a)		108,120		2,267,276
				5,655,839
Software — 2.9%
Avaya Holdings Corp. (a)		57,688		1,142,222
Change Healthcare, Inc. (a)		111,630		2,386,649
CommVault Systems, Inc. (a)		30,487		2,101,164
Donnelley Financial Solutions, Inc. (a)		26,764		1,261,655
IBEX Holdings Ltd. (a) (d)		14,223		183,335
Teradata Corp. (a)		34,738		1,475,323
				8,550,348
				16,731,898
Utilities — 1.8%
Electric — 1.0%
IDACORP, Inc.		26,030		2,949,459

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

	Number of Shares		Value
Gas — 0.8%
South Jersey Industries, Inc. (d)		18,931	$	494,478
Southwest Gas Holdings, Inc.		25,230		1,767,362
				2,261,840
				5,211,299
TOTAL COMMON STOCK (Cost $233,997,590)				293,879,248
TOTAL EQUITIES (Cost $233,997,590)				293,879,248
MUTUAL FUNDS — 0.4%
Diversified Financial Services — 0.4%
State Street Navigator Securities Lending Government Money Market Portfolio (f)		1,062,233		1,062,233
TOTAL MUTUAL FUNDS (Cost $1,062,233)				1,062,233
TOTAL LONG-TERM INVESTMENTS (Cost $235,059,823)				294,941,481
	Principal Amount
SHORT-TERM INVESTMENTS — 0.8%
Repurchase Agreement — 0.8%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (g)	$	2,387,399		2,387,399
TOTAL SHORT-TERM INVESTMENTS (Cost $2,387,399)				2,387,399
TOTAL INVESTMENTS — 101.0% (Cost $237,447,222) (h)				297,328,880
Other Assets/(Liabilities) — (1.0)%				(2,944,193)
NET ASSETS — 100.0%			$	294,384,687

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) Investment was valued using significant unobservable inputs.

(c) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At December 31, 2021, these securities amounted to a value of $0 or 0.00% of net assets.

(d) Denotes all or a portion of security on loan. The total value of securities on loan as of December 31, 2021, was $1,767,616 or 0.60% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $746,008 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 a Master Limited Partnership

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

(g) Maturity value of $2,387,399. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $2,435,281.

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

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
UBS AG	3/31/22	USD	556,996	SEK	5,078,832		(5,479)

Currency Legend

SEK Swedish Krona

USD U.S. Dollar

MM S&P Mid Cap Index Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.8%
COMMON STOCK — 99.8%
Basic Materials — 4.7%
Chemicals — 2.2%
Ashland Global Holdings, Inc.		10,645	$	1,146,041
Cabot Corp.		10,698		601,228
The Chemours Co.		30,713		1,030,728
Ingevity Corp. (a)		7,404		530,867
Minerals Technologies, Inc.		6,288		459,967
NewMarket Corp.		1,302		446,222
Olin Corp.		26,977		1,551,717
RPM International, Inc.		24,357		2,460,057
Sensient Technologies Corp.		7,922		792,675
Valvoline, Inc.		33,898		1,264,056
				10,283,558
Iron & Steel — 1.7%
Cleveland-Cliffs, Inc. (a)		85,408		1,859,332
Commercial Metals Co.		22,728		824,799
Reliance Steel & Aluminum Co.		11,760		1,907,707
Steel Dynamics, Inc.		35,396		2,197,030
United States Steel Corp. (b)		50,924		1,212,500
				8,001,368
Mining — 0.8%
Alcoa Corp.		35,126		2,092,807
Compass Minerals International, Inc.		6,358		324,767
Royal Gold, Inc.		12,310		1,295,135
				3,712,709
				21,997,635
Communications — 2.2%
Internet — 0.4%
Mimecast Ltd. (a)		11,636		925,876
TripAdvisor, Inc. (a)		18,665		508,808
Yelp, Inc. (a)		12,944		469,091
				1,903,775
Media — 0.9%
Cable One, Inc.		930		1,640,009
The New York Times Co. Class A		31,349		1,514,157
TEGNA, Inc.		41,702		773,989

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

	Number of Shares		Value
World Wrestling Entertainment, Inc. Class A (b)		8,454	$	417,120
				4,345,275
Telecommunications — 0.9%
Ciena Corp. (a)		29,088		2,238,903
Iridium Communications, Inc. (a)		24,911		1,028,575
ViaSat, Inc. (a)		13,839		616,389
				3,883,867
				10,132,917
Consumer, Cyclical — 16.7%
Airlines — 0.2%
JetBlue Airways Corp. (a)		59,957		853,788
Apparel — 2.0%
Capri Holdings Ltd. (a)		28,238		1,832,928
Carter's, Inc.		7,963		806,015
Columbia Sportswear Co.		6,465		629,950
Crocs, Inc. (a)		11,042		1,415,805
Deckers Outdoor Corp. (a)		5,152		1,887,229
Hanesbrands, Inc.		65,804		1,100,243
Skechers U.S.A., Inc. Class A (a)		25,417		1,103,098
Urban Outfitters, Inc. (a)		12,416		364,534
				9,139,802
Auto Parts & Equipment — 1.7%
Adient PLC (a)		17,755		850,109
Dana, Inc.		27,181		620,270
Fox Factory Holding Corp. (a)		7,897		1,343,280
Gentex Corp.		44,376		1,546,504
The Goodyear Tire & Rubber Co. (a)		52,950		1,128,894
Lear Corp.		11,191		2,047,393
Visteon Corp. (a)		5,275		586,264
				8,122,714
Distribution & Wholesale — 1.1%
Avient Corp.		17,245		964,858
IAA, Inc. (a)		25,409		1,286,203
Univar Solutions, Inc. (a)		32,217		913,352
Watsco, Inc.		6,199		1,939,543
				5,103,956
Entertainment — 1.0%
Churchill Downs, Inc.		6,476		1,560,069
Marriott Vacations Worldwide Corp.		7,989		1,349,981
Scientific Games Corp. Class A (a)		18,186		1,215,370
Six Flags Entertainment Corp. (a)		14,583		620,944
				4,746,364
Home Builders — 1.0%
KB Home		16,150		722,389
Taylor Morrison Home Corp. (a)		23,157		809,569
Thor Industries, Inc.		10,464		1,085,849

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

	Number of Shares		Value
Toll Brothers, Inc.		21,468	$	1,554,069
TRI Pointe Group, Inc. (a)		20,945		584,156
				4,756,032
Home Furnishing — 0.7%
Leggett & Platt, Inc.		25,130		1,034,351
MillerKnoll, Inc.		14,279		559,594
Tempur Sealy International, Inc.		36,128		1,699,100
				3,293,045
Housewares — 0.3%
The Scotts Miracle-Gro Co.		7,676		1,235,836
Leisure Time — 1.2%
Brunswick Corp.		14,462		1,456,757
Callaway Golf Co. (a)		22,080		605,875
Harley-Davidson, Inc.		28,997		1,092,897
Polaris, Inc.		10,748		1,181,313
YETI Holdings, Inc. (a)		16,440		1,361,725
				5,698,567
Lodging — 1.0%
Boyd Gaming Corp. (a)		15,371		1,007,876
Choice Hotels International, Inc.		6,185		964,798
Travel + Leisure Co.		16,265		898,967
Wyndham Hotels & Resorts, Inc.		17,483		1,567,351
				4,438,992
Retail — 6.2%
American Eagle Outfitters, Inc. (b)		28,909		731,976
AutoNation, Inc. (a)		7,533		880,231
BJ's Wholesale Club Holdings, Inc. (a)		25,624		1,716,039
Casey's General Stores, Inc.		6,990		1,379,477
Cracker Barrel Old Country Store, Inc.		4,424		569,103
Dick's Sporting Goods, Inc. (b)		12,171		1,399,543
FirstCash Holdings, Inc.		7,556		565,264
Five Below, Inc. (a)		10,517		2,175,862
Foot Locker, Inc.		17,016		742,408
GameStop Corp. Class A (a) (b)		11,637		1,726,815
Jack in the Box, Inc.		4,085		357,356
Kohl's Corp.		28,239		1,394,724
Lithia Motors, Inc.		5,682		1,687,270
Macy's, Inc.		58,104		1,521,163
MSC Industrial Direct Co., Inc. Class A		8,822		741,577
Murphy USA, Inc.		4,437		884,028
Nordstrom, Inc. (a) (b)		20,962		474,161
Nu Skin Enterprises, Inc. Class A		9,389		476,492
Ollie's Bargain Outlet Holdings, Inc. (a)		11,402		583,668
Papa John's International, Inc.		6,079		811,364
RH (a)		3,255		1,744,485
Texas Roadhouse, Inc.		13,125		1,171,800
Victoria's Secret & Co. (a)		13,652		758,232
The Wendy's Co.		33,049		788,219
Williams-Sonoma, Inc.		13,964		2,361,731

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

	Number of Shares		Value
Wingstop, Inc.		5,621	$	971,309
				28,614,297
Toys, Games & Hobbies — 0.3%
Mattel, Inc. (a)		66,014		1,423,262
				77,426,655
Consumer, Non-cyclical — 16.3%
Agriculture — 0.5%
Darling Ingredients, Inc. (a)		30,374		2,104,614
Beverages — 0.2%
The Boston Beer Co., Inc. Class A (a)		1,769		893,522
Biotechnology — 1.1%
Arrowhead Pharmaceuticals, Inc. (a)		19,558		1,296,696
Exelixis, Inc. (a)		59,611		1,089,689
Halozyme Therapeutics, Inc. (a)		26,391		1,061,182
United Therapeutics Corp. (a)		8,453		1,826,524
				5,274,091
Commercial Services — 4.1%
ASGN, Inc. (a)		9,819		1,211,665
Avis Budget Group, Inc. (a)		7,521		1,559,630
The Brink's Co.		9,192		602,719
FTI Consulting, Inc. (a)		6,461		991,247
Graham Holdings Co. Class B		752		473,632
Grand Canyon Education, Inc. (a)		7,549		647,025
GXO Logistics, Inc. (a)		18,502		1,680,537
H&R Block, Inc.		33,098		779,789
HealthEquity, Inc. (a)		15,735		696,116
Insperity, Inc.		6,748		797,006
John Wiley & Sons, Inc. Class A		8,208		470,072
LiveRamp Holdings, Inc. (a)		12,831		615,246
ManpowerGroup, Inc.		10,221		994,810
Paylocity Holding Corp. (a)		7,436		1,756,086
PROG Holdings, Inc. (a)		10,687		482,091
Progyny, Inc. (a)		13,120		660,592
R1 RCM, Inc. (a)		25,005		637,377
Sabre Corp. (a) (b)		60,947		523,535
Service Corp. International		30,961		2,197,921
WEX, Inc. (a)		8,445		1,185,594
				18,962,690
Cosmetics & Personal Care — 0.1%
Coty, Inc. Class A (a)		63,236		663,978
Food — 1.8%
Flowers Foods, Inc.		37,446		1,028,642
Grocery Outlet Holding Corp. (a) (b)		16,464		465,602
The Hain Celestial Group, Inc. (a)		17,387		740,860
Ingredion, Inc.		12,538		1,211,672
Lancaster Colony Corp.		3,734		618,350
Performance Food Group Co. (a)		29,077		1,334,344
Pilgrim's Pride Corp. (a)		9,105		256,761
Post Holdings, Inc. (a)		11,031		1,243,525

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

	Number of Shares		Value
Sanderson Farms, Inc.		3,997	$	763,747
Sprouts Farmers Market, Inc. (a)		21,152		627,791
				8,291,294
Health Care – Products — 4.2%
Bruker Corp.		19,064		1,599,660
Envista Holdings Corp. (a)		30,270		1,363,966
Globus Medical, Inc. Class A (a)		14,893		1,075,275
Haemonetics Corp. (a)		9,630		510,775
ICU Medical, Inc. (a)		3,762		892,873
Integra LifeSciences Holdings Corp. (a)		13,726		919,505
LivaNova PLC (a)		10,030		876,923
Masimo Corp. (a)		9,541		2,793,414
Neogen Corp. (a)		20,252		919,643
NuVasive, Inc. (a)		9,749		511,627
Penumbra, Inc. (a)		6,591		1,893,726
Quidel Corp. (a)		7,146		964,639
Repligen Corp. (a)		9,656		2,557,295
STAAR Surgical Co. (a)		8,969		818,870
Tandem Diabetes Care, Inc. (a)		11,925		1,794,951
				19,493,142
Health Care – Services — 3.0%
Acadia Healthcare Co., Inc. (a)		16,952		1,028,986
Amedisys, Inc. (a)		6,144		994,591
Chemed Corp.		2,888		1,527,867
Encompass Health Corp.		18,753		1,223,821
LHC Group, Inc. (a)		5,968		818,989
Medpace Holdings, Inc. (a)		5,417		1,178,956
Molina Healthcare, Inc. (a)		10,970		3,489,337
Syneos Health, Inc. (a)		19,465		1,998,666
Tenet Healthcare Corp. (a)		20,101		1,642,051
				13,903,264
Household Products & Wares — 0.2%
Helen of Troy Ltd. (a)		4,546		1,111,361
Pharmaceuticals — 1.1%
Jazz Pharmaceuticals PLC (a)		11,533		1,469,304
Neurocrine Biosciences, Inc. (a)		17,800		1,516,026
Option Care Health, Inc. (a)		26,104		742,398
Patterson Cos., Inc.		16,323		479,080
Perrigo Co. PLC		25,207		980,552
				5,187,360
				75,885,316
Energy — 2.8%
Energy – Alternate Sources — 0.7%
First Solar, Inc. (a)		18,556		1,617,341
SunPower Corp. (a)		15,645		326,511
Sunrun, Inc. (a) (b)		38,830		1,331,869
				3,275,721

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

	Number of Shares		Value
Oil & Gas — 0.9%
CNX Resources Corp. (a)		39,801	$	547,264
DTE Midstream LLC (a)		18,229		874,627
EQT Corp. (a)		56,976		1,242,646
HollyFrontier Corp.		28,165		923,249
Murphy Oil Corp.		27,363		714,448
				4,302,234
Oil & Gas Services — 0.4%
ChampionX Corp. (a)		38,080		769,597
Nov, Inc.		73,631		997,700
				1,767,297
Pipelines — 0.8%
Antero Midstream Corp.		61,196		592,377
Equitrans Midstream Corp.		76,621		792,261
Targa Resources Corp.		42,989		2,245,746
				3,630,384
				12,975,636
Financial — 24.2%
Banks — 6.1%
Associated Banc-Corp.		28,289		639,049
Bank of Hawaii Corp.		7,624		638,586
Bank OZK		22,781		1,060,000
Cadence Bank		36,919		1,099,817
Cathay General Bancorp		14,445		620,991
CIT Group, Inc.		18,688		959,442
Commerce Bancshares, Inc.		20,910		1,437,353
Cullen/Frost Bankers, Inc.		10,637		1,341,007
East West Bancorp, Inc.		26,640		2,096,035
F.N.B. Corp.		60,120		729,256
First Financial Bankshares, Inc.		24,160		1,228,294
First Horizon Corp.		101,472		1,657,038
Fulton Financial Corp.		30,400		516,800
Glacier Bancorp, Inc.		20,439		1,158,891
Hancock Whitney Corp.		16,362		818,427
Home BancShares, Inc.		28,402		691,589
International Bancshares Corp.		10,029		425,129
PacWest Bancorp		22,097		998,121
Pinnacle Financial Partners, Inc.		14,281		1,363,835
Prosperity Bancshares, Inc.		17,345		1,254,044
Synovus Financial Corp.		27,291		1,306,420
Texas Capital Bancshares, Inc. (a)		9,536		574,544
UMB Financial Corp.		8,110		860,552
Umpqua Holdings Corp.		40,818		785,338
United Bankshares, Inc.		25,690		932,033
Valley National Bancorp		76,693		1,054,529
Webster Financial Corp.		17,070		953,189
Wintrust Financial Corp.		10,741		975,498
				28,175,807
Diversified Financial Services — 2.9%
Affiliated Managers Group, Inc.		7,660		1,260,147

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

	Number of Shares		Value
Alliance Data Systems Corp.		9,383	$	624,626
Evercore, Inc. Class A		7,352		998,769
Federated Hermes, Inc.		18,196		683,806
Interactive Brokers Group, Inc. Class A		16,464		1,307,571
Janus Henderson Group PLC		31,996		1,341,912
Jefferies Financial Group, Inc.		36,853		1,429,896
Navient Corp.		30,376		644,579
SEI Investments Co.		19,960		1,216,362
SLM Corp.		55,246		1,086,689
Stifel Financial Corp.		19,616		1,381,359
The Western Union Co.		75,408		1,345,279
				13,320,995
Insurance — 4.4%
Alleghany Corp. (a)		2,571		1,716,374
American Financial Group, Inc.		12,414		1,704,691
Brighthouse Financial, Inc. (a)		15,044		779,279
CNO Financial Group, Inc.		23,255		554,399
Essent Group Ltd.		20,807		947,343
First American Financial Corp.		20,597		1,611,303
The Hanover Insurance Group, Inc.		6,707		879,020
Kemper Corp.		11,276		662,916
Kinsale Capital Group, Inc.		4,042		961,551
Mercury General Corp.		4,965		263,443
MGIC Investment Corp.		61,350		884,667
Old Republic International Corp.		53,551		1,316,284
Primerica, Inc.		7,442		1,140,635
Reinsurance Group of America, Inc.		12,681		1,388,443
RenaissanceRe Holdings Ltd.		8,634		1,461,995
RLI Corp.		7,503		841,086
Selective Insurance Group, Inc.		11,332		928,544
Unum Group		38,537		946,854
Voya Financial, Inc.		20,869		1,383,823
				20,372,650
Real Estate — 0.5%
Jones Lang LaSalle, Inc. (a)		9,477		2,552,535
Real Estate Investment Trusts (REITS) — 9.8%
American Campus Communities, Inc.		26,108		1,495,727
Apartment Income REIT Corp.		29,458		1,610,469
Brixmor Property Group, Inc.		55,710		1,415,591
Camden Property Trust		19,197		3,430,120
Corporate Office Properties Trust		21,172		592,181
Cousins Properties, Inc.		28,020		1,128,646
CyrusOne, Inc.		23,827		2,137,758
Douglas Emmett, Inc.		33,069		1,107,811
EastGroup Properties, Inc.		7,635		1,739,635
EPR Properties		14,097		669,467
First Industrial Realty Trust, Inc.		24,448		1,618,458
Healthcare Realty Trust, Inc.		27,804		879,719
Highwoods Properties, Inc.		19,671		877,130
Hudson Pacific Properties, Inc.		28,737		710,091
JBG SMITH Properties		21,512		617,609
Kilroy Realty Corp.		19,660		1,306,604
Kite Realty Group Trust		41,277		899,013
Lamar Advertising Co. Class A		16,297		1,976,826

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

	Number of Shares		Value
Life Storage, Inc.		15,400	$	2,358,972
The Macerich Co.		40,147		693,740
Medical Properties Trust, Inc.		111,978		2,646,040
National Retail Properties, Inc.		32,951		1,583,955
National Storage Affiliates Trust		15,445		1,068,794
Omega Healthcare Investors, Inc.		45,032		1,332,497
Park Hotels & Resorts, Inc. (a)		44,563		841,349
Pebblebrook Hotel Trust		24,757		553,814
Physicians Realty Trust		41,515		781,727
PotlatchDeltic Corp.		12,645		761,482
PS Business Parks, Inc.		3,789		697,820
Rayonier, Inc.		26,976		1,088,751
Rexford Industrial Realty, Inc.		28,442		2,306,931
Sabra Health Care REIT, Inc.		43,096		583,520
SL Green Realty Corp.		12,531		898,473
Spirit Realty Capital, Inc.		23,241		1,119,984
STORE Capital Corp.		46,048		1,584,051
Urban Edge Properties		20,758		394,402
				45,509,157
Savings & Loans — 0.5%
New York Community Bancorp, Inc.		87,635		1,070,023
Sterling Bancorp		36,307		936,358
Washington Federal, Inc.		12,279		409,873
				2,416,254
				112,347,398
Industrial — 20.6%
Aerospace & Defense — 0.3%
Hexcel Corp. (a)		15,808		818,855
Mercury Systems, Inc. (a)		10,673		587,655
				1,406,510
Building Materials — 3.1%
Builders FirstSource, Inc. (a)		35,967		3,082,732
Eagle Materials, Inc.		7,666		1,276,082
Lennox International, Inc.		6,319		2,049,631
Louisiana-Pacific Corp.		16,502		1,292,932
MDU Resources Group, Inc.		38,318		1,181,727
Owens Corning		18,857		1,706,558
Simpson Manufacturing Co., Inc.		8,186		1,138,427
Trex Co., Inc. (a)		21,620		2,919,349
				14,647,438
Electrical Components & Equipment — 1.3%
Acuity Brands, Inc.		6,551		1,386,978
Belden, Inc.		8,461		556,142
Energizer Holdings, Inc.		11,855		475,385
EnerSys		7,893		624,021
Littelfuse, Inc.		4,621		1,454,136
Universal Display Corp.		8,168		1,347,965
				5,844,627

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

	Number of Shares		Value
Electronics — 3.4%
Arrow Electronics, Inc. (a)		13,067	$	1,754,506
Avnet, Inc.		18,696		770,836
Coherent, Inc. (a)		4,623		1,232,215
Hubbell, Inc.		10,215		2,127,478
II-VI, Inc. (a) (b)		19,910		1,360,450
Jabil, Inc.		26,904		1,892,696
National Instruments Corp.		24,723		1,079,654
nVent Electric PLC		31,704		1,204,752
TD SYNNEX Corp.		7,780		889,721
Vicor Corp. (a)		4,041		513,126
Vishay Intertechnology, Inc.		24,982		546,356
Vontier Corp.		31,853		978,843
Woodward, Inc.		11,824		1,294,255
				15,644,888
Engineering & Construction — 1.6%
AECOM (a)		27,044		2,091,853
Dycom Industries, Inc. (a)		5,686		533,119
EMCOR Group, Inc.		10,033		1,278,104
Fluor Corp. (a) (b)		26,650		660,121
MasTec, Inc. (a)		10,783		995,055
TopBuild Corp. (a)		6,179		1,704,848
				7,263,100
Environmental Controls — 0.8%
Clean Harbors, Inc. (a)		9,433		941,130
Stericycle, Inc. (a)		17,309		1,032,309
Tetra Tech, Inc.		10,147		1,722,961
				3,696,400
Hand & Machine Tools — 1.1%
Kennametal, Inc.		15,766		566,157
Lincoln Electric Holdings, Inc.		11,079		1,545,188
MSA Safety, Inc.		6,870		1,037,095
Regal Rexnord Corp.		12,721		2,164,860
				5,313,300
Machinery – Construction & Mining — 0.4%
Oshkosh Corp.		12,876		1,451,254
Terex Corp.		13,156		578,206
				2,029,460
Machinery – Diversified — 3.7%
AGCO Corp.		11,510		1,335,390
Cognex Corp.		33,201		2,581,710
Colfax Corp. (a)		25,377		1,166,581
Crane Co.		9,409		957,177
Curtiss-Wright Corp.		7,394		1,025,326
Flowserve Corp.		24,551		751,260
Graco, Inc.		31,916		2,573,068
The Middleby Corp. (a)		10,442		2,054,568
Nordson Corp.		10,149		2,590,735

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

	Number of Shares		Value
The Toro Co.		19,982	$	1,996,402
				17,032,217
Metal Fabricate & Hardware — 0.5%
The Timken Co.		12,963		898,206
Valmont Industries, Inc.		4,000		1,002,000
Worthington Industries, Inc.		6,097		333,262
				2,233,468
Miscellaneous - Manufacturing — 1.7%
Axon Enterprise, Inc. (a)		12,329		1,935,653
Carlisle Cos., Inc.		9,817		2,435,794
Donaldson Co., Inc.		23,183		1,373,825
ITT, Inc.		16,063		1,641,478
Trinity Industries, Inc.		15,420		465,684
				7,852,434
Packaging & Containers — 0.8%
AptarGroup, Inc.		12,349		1,512,505
Greif, Inc. Class A		4,959		299,375
Silgan Holdings, Inc.		15,826		677,986
Sonoco Products Co.		18,540		1,073,281
				3,563,147
Transportation — 1.8%
Kirby Corp. (a)		11,327		673,050
Knight-Swift Transportation Holdings, Inc.		31,149		1,898,220
Landstar System, Inc.		7,180		1,285,364
Ryder System, Inc.		10,120		834,192
Saia, Inc. (a)		4,942		1,665,602
Werner Enterprises, Inc.		11,468		546,565
XPO Logistics, Inc. (a)		18,506		1,432,919
				8,335,912
Trucking & Leasing — 0.1%
GATX Corp.		6,692		697,239
				95,560,140
Technology — 9.2%
Computers — 2.2%
CACI International, Inc. Class A (a)		4,374		1,177,524
Genpact Ltd.		32,470		1,723,508
KBR, Inc.		26,438		1,258,978
Kyndryl Holdings, Inc. (a)		33,758		611,020
Lumentum Holdings, Inc. (a)		13,564		1,434,664
MAXIMUS, Inc.		11,582		922,738
NCR Corp. (a)		24,874		999,935
Qualys, Inc. (a)		6,291		863,251
Science Applications International Corp.		10,848		906,784
				9,898,402
Office & Business Equipment — 0.1%
Xerox Holdings Corp.		25,905		586,489

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

	Number of Shares		Value
Semiconductors — 3.6%
Amkor Technology, Inc.		18,888	$	468,234
Azenta, Inc.		13,947		1,438,075
Cirrus Logic, Inc. (a)		10,771		991,148
CMC Materials, Inc.		5,354		1,026,308
Lattice Semiconductor Corp. (a)		25,705		1,980,827
MKS Instruments, Inc.		10,408		1,812,761
Power Integrations, Inc.		11,366		1,055,788
Semtech Corp. (a)		12,140		1,079,610
Silicon Laboratories, Inc. (a)		7,540		1,556,407
SiTime Corp. (a)		2,824		826,133
Synaptics, Inc. (a)		7,383		2,137,452
Wolfspeed, Inc. (a)		21,761		2,432,227
				16,804,970
Software — 3.3%
ACI Worldwide, Inc. (a)		22,154		768,744
Aspen Technology, Inc. (a)		12,561		1,911,784
Blackbaud, Inc. (a)		7,807		616,597
CDK Global, Inc.		22,294		930,552
Cerence, Inc. (a)		7,162		548,896
CommVault Systems, Inc. (a)		8,583		591,540
Concentrix Corp.		8,049		1,437,712
Digital Turbine, Inc. (a) (b)		16,569		1,010,543
Envestnet, Inc. (a)		10,295		816,805
Fair Isaac Corp. (a)		5,137		2,227,763
Manhattan Associates, Inc. (a)		11,878		1,846,910
SailPoint Technologies Holding, Inc. (a)		17,574		849,527
Teradata Corp. (a)		20,380		865,539
Ziff Davis, Inc. (a)		9,086		1,007,274
				15,430,186
				42,720,047
Utilities — 3.1%
Electric — 1.3%
ALLETE, Inc.		9,906		657,263
Black Hills Corp.		12,026		848,675
Hawaiian Electric Industries, Inc.		20,598		854,817
IDACORP, Inc.		9,518		1,078,485
NorthWestern Corp. (b)		9,922		567,141
OGE Energy Corp.		37,552		1,441,246
PNM Resources, Inc.		16,173		737,650
				6,185,277
Gas — 1.3%
National Fuel Gas Co.		17,183		1,098,681
New Jersey Resources Corp.		18,173		746,184
ONE Gas, Inc.		10,097		783,426
Southwest Gas Holdings, Inc.		11,379		797,099
Spire, Inc.		9,740		635,243
UGI Corp.		39,245		1,801,738
				5,862,371

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

	Number of Shares		Value
Water — 0.5%
Essential Utilities, Inc.		43,184	$	2,318,549
				14,366,197
TOTAL COMMON STOCK (Cost $332,343,916)				463,411,941
TOTAL EQUITIES (Cost $332,343,916)				463,411,941
MUTUAL FUNDS — 0.3%
Diversified Financial Services — 0.3%
State Street Navigator Securities Lending Government Money Market Portfolio (c)		1,458,188		1,458,188
TOTAL MUTUAL FUNDS (Cost $1,458,188)				1,458,188
TOTAL LONG-TERM INVESTMENTS (Cost $333,802,104)				464,870,129
	Principal Amount
SHORT-TERM INVESTMENTS — 0.5%
Repurchase Agreement — 0.3%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (d)	$	1,449,151		1,449,151
U.S. Treasury Bill — 0.2%
U.S. Treasury Bill
0.038% 1/27/22 (e) (f)		930,000		929,983
TOTAL SHORT-TERM INVESTMENTS (Cost $2,379,126)				2,379,134
TOTAL INVESTMENTS — 100.6% (Cost $336,181,230) (g)				467,249,263
Other Assets/(Liabilities) — (0.6)%				(2,967,172)
NET ASSETS — 100.0%			$	464,282,091

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 December 31, 2021, was $7,604,691 or 1.64% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $6,331,294 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 $1,449,151. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $1,478,186.

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

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

(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 Mid Cap 400 E Mini Index	3/18/22	9	$	2,468,680	$	85,250

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.6%
COMMON STOCK — 99.6%
Basic Materials — 3.2%
Chemicals — 1.9%
AdvanSix, Inc.		2,677	$	126,488
American Vanguard Corp.		2,876		47,138
Amyris, Inc. (a) (b)		17,213		93,122
Balchem Corp.		3,151		531,259
Cabot Corp.		5,449		306,234
Codexis, Inc. (a)		5,877		183,774
Danimer Scientific, Inc. (a) (b)		8,836		75,283
Ecovyst, Inc.		5,039		51,599
Ferro Corp. (a)		8,051		175,753
GCP Applied Technologies, Inc. (a)		4,807		152,190
H.B. Fuller Co.		5,079		411,399
Hawkins, Inc.		1,889		74,521
Ingevity Corp. (a)		3,862		276,905
Innospec, Inc.		2,369		214,015
Intrepid Potash, Inc. (a)		976		41,704
Koppers Holdings, Inc. (a)		2,040		63,852
Kraton Corp. (a)		3,071		142,249
Kronos Worldwide, Inc.		2,208		33,142
Marrone Bio Innovations, Inc. (a)		9,622		6,930
Minerals Technologies, Inc.		3,236		236,713
Oil-Dri Corp. of America		513		16,791
Orion Engineered Carbons SA (a)		5,997		110,105
Quaker Chemical Corp.		1,315		303,476
Rayonier Advanced Materials, Inc. (a)		6,136		35,037
Rogers Corp. (a)		1,828		499,044
Sensient Technologies Corp.		4,121		412,347
Stepan Co.		2,084		259,020
Trinseo PLC		3,810		199,873
Tronox Holdings PLC Class A		11,175		268,535
Unifi, Inc. (a)		1,315		30,442
Valhi, Inc.		230		6,613
Zymergen, Inc. (a)		7,816		52,289
				5,437,842
Forest Products & Paper — 0.1%
Clearwater Paper Corp. (a)		1,621		59,442
Glatfelter Corp.		4,308		74,098
Neenah, Inc.		1,659		76,778
Schweitzer-Mauduit International, Inc.		3,095		92,540
Verso Corp. Class A		2,649		71,576
				374,434
Iron & Steel — 0.3%
Allegheny Technologies, Inc. (a)		12,450		198,329

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Carpenter Technology Corp.		4,654	$	135,850
Commercial Metals Co.		11,703		424,702
Schnitzer Steel Industries, Inc. Class A		2,532		131,461
				890,342
Mining — 0.9%
Arconic Corp. (a)		10,427		344,195
Century Aluminum Co. (a)		5,049		83,612
Coeur Mining, Inc. (a)		25,003		126,015
Compass Minerals International, Inc.		3,340		170,607
Constellium SE (a)		12,122		217,105
Energy Fuels, Inc. (a)		15,096		115,183
Ferroglobe Representation & Warranty Insurance Trust (a) (c) (d)		10,133		—
Gatos Silver, Inc. (a)		4,553		47,260
Hecla Mining Co.		51,762		270,198
Kaiser Aluminum Corp.		1,545		145,137
Livent Corp. (a) (b)		15,807		385,375
MP Materials Corp. (a)		7,404		336,290
Novagold Resources, Inc. (a)		23,212		159,234
Perpetua Resources Corp. (a)		3,093		14,692
PolyMet Mining Corp. (a)		2,882		7,205
United States Lime & Minerals, Inc.		206		26,578
Ur-Energy, Inc. (a)		17,906		21,845
Uranium Energy Corp. (a) (b)		24,978		83,676
				2,554,207
				9,256,825
Communications — 4.2%
Advertising — 0.1%
Advantage Solutions, Inc. (a) (b)		7,502		60,166
Boston Omaha Corp. Class A (a)		1,981		56,914
Clear Channel Outdoor Holdings, Inc. (a)		35,475		117,422
Fluent, Inc. (a) (b)		4,210		8,378
National CineMedia, Inc.		5,819		16,351
Quotient Technology, Inc. (a)		8,732		64,792
Stagwell, Inc. (a)		6,052		52,471
				376,494
Internet — 1.9%
1-800-Flowers.com, Inc. Class A (a)		2,618		61,183
1stdibs.com, Inc. (a)		643		8,044
aka Brands Holding Corp. (a)		912		8,436
Bright Health Group, Inc. (a)		5,304		18,246
Cargurus, Inc. (a)		9,318		313,458
CarParts.com, Inc. (a) (b)		4,802		53,782
Cars.com, Inc. (a)		6,682		107,513
ChannelAdvisor Corp. (a)		2,871		70,856
Cogent Communications Holdings, Inc.		4,146		303,404
Comscore, Inc. (a)		6,825		22,796
Couchbase, Inc. (a)		957		23,887
Digital Media Solutions, Inc. Class A (a)		308		1,472
ePlus, Inc. (a)		2,630		141,704
Eventbrite, Inc. Class A (a) (b)		7,426		129,510
Everquote, Inc. Class A (a)		1,898		29,723
fuboTV, Inc. (a) (b)		13,211		205,035
Groupon, Inc. (a) (b)		2,313		53,569

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
HealthStream, Inc. (a)		2,484	$	65,478
HyreCar, Inc. (a)		1,754		8,261
Lands' End, Inc. (a)		1,420		27,875
Limelight Networks, Inc. (a) (b)		12,410		42,566
Liquidity Services, Inc. (a)		2,602		57,452
Liveone, Inc. Common Stock Usd.001 (a)		5,679		7,269
Lulu's Fashion Lounge Holdings, Inc. (a)		551		5,637
Magnite, Inc. (a) (b)		12,658		221,515
MediaAlpha, Inc. Class A (a)		2,105		32,501
Mimecast Ltd. (a)		5,948		473,282
Open Lending Corp. Class A (a)		10,156		228,307
Overstock.com, Inc. (a)		4,193		247,429
Perficient, Inc. (a)		3,173		410,237
Q2 Holdings, Inc. (a)		5,335		423,813
QuinStreet, Inc. (a)		4,897		89,077
RealReal, Inc. (a)		7,776		90,279
Revolve Group, Inc. (a)		3,510		196,700
Shutterstock, Inc.		2,280		252,806
Solo Brands, Inc. Class A (a)		1,131		17,678
Stitch Fix, Inc. Class A (a)		7,945		150,319
TechTarget, Inc. (a)		2,554		244,316
TrueCar, Inc. (a)		9,462		32,171
Tucows, Inc. Class A (a)		959		80,383
Upwork, Inc. (a)		11,511		393,216
VirnetX Holding Corp. (a) (b)		6,322		16,437
Yelp, Inc. (a)		6,949		251,832
				5,619,454
Media — 0.7%
AMC Networks, Inc. Class A (a)		2,842		97,878
CuriosityStream, Inc. (a)		2,523		14,961
The E.W. Scripps Co. Class A		5,598		108,321
Entercom Communications Corp. (a)		11,703		30,077
Entravision Communications Corp. Class A		5,897		39,982
Gannett Co., Inc. (a)		13,850		73,820
Gray Television, Inc.		8,353		168,396
Hemisphere Media Group, Inc. (a)		1,570		11,414
Houghton Mifflin Harcourt Co. (a)		12,410		199,801
iHeartMedia, Inc. Class A (a)		10,902		229,378
Liberty Latin America Ltd. Class A (a)		3,909		45,579
Liberty Latin America Ltd. Class C (a)		15,154		172,756
Scholastic Corp.		2,577		102,977
Sinclair Broadcast Group, Inc. Class A		4,490		118,671
TEGNA, Inc.		21,567		400,284
Thryv Holdings, Inc. (a) (b)		748		30,765
Value Line, Inc.		91		4,261
WideOpenWest, Inc. (a)		5,119		110,161
				1,959,482
Telecommunications — 1.5%
A10 Networks, Inc.		5,930		98,319
ADTRAN, Inc.		4,718		107,712
Anterix, Inc. (a)		1,127		66,223
ATN International, Inc.		1,090		43,546
Aviat Networks, Inc. (a)		1,068		34,261
CalAmp Corp. (a)		3,463		24,449
Calix, Inc. (a)		5,382		430,399

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Cambium Networks Corp. (a)		1,052	$	26,963
Casa Systems, Inc. (a)		3,043		17,254
Clearfield, Inc. (a)		1,125		94,972
Consolidated Communications Holdings, Inc. (a) (b)		7,160		53,557
DZS, Inc. (a)		1,661		26,941
EchoStar Corp. Class A (a)		3,634		95,756
Extreme Networks, Inc. (a)		12,413		194,884
Globalstar, Inc. (a) (b)		59,751		69,311
Gogo, Inc. (a)		5,817		78,704
Harmonic, Inc. (a)		8,832		103,864
IDT Corp. Class B (a)		1,954		86,289
Infinera Corp. (a)		17,900		171,661
InterDigital, Inc.		2,999		214,818
Iridium Communications, Inc. (a)		11,530		476,074
KVH Industries, Inc. (a)		1,431		13,151
Maxar Technologies, Inc.		7,082		209,131
NeoPhotonics Corp. (a)		5,047		77,572
NETGEAR, Inc. (a)		2,806		81,963
Ooma, Inc. (a)		2,132		43,578
Plantronics, Inc. (a) (b)		4,123		120,969
Preformed Line Products Co.		292		18,892
Ribbon Communications, Inc. (a)		6,988		42,277
Shenandoah Telecommunications Co.		4,722		120,411
Telephone & Data Systems, Inc.		9,878		199,042
Telesat Corp. (a)		1,276		36,583
United States Cellular Corp. (a)		1,519		47,879
Viavi Solutions, Inc. (a)		23,440		413,013
Vonage Holdings Corp. (a)		23,592		490,478
				4,430,896
				12,386,326
Consumer, Cyclical — 13.4%
Airlines — 0.3%
Allegiant Travel Co. (a)		1,491		278,877
Frontier Group Holdings, Inc. (a)		3,416		46,355
Hawaiian Holdings, Inc. (a)		5,000		91,850
Mesa Air Group, Inc. (a)		3,393		19,001
SkyWest, Inc. (a)		4,888		192,098
Spirit Airlines, Inc. (a)		9,543		208,514
Sun Country Airlines Holdings, Inc. (a)		3,136		85,456
				922,151
Apparel — 0.7%
Crocs, Inc. (a)		5,689		729,444
Fossil Group, Inc. (a)		4,682		48,178
Kontoor Brands, Inc.		5,051		258,864
Oxford Industries, Inc.		1,575		159,894
PLBY Group, Inc. (a)		2,809		74,832
Rocky Brands, Inc.		678		26,984
Steven Madden Ltd.		7,890		366,648
Superior Group of Cos, Inc.		1,145		25,121
Torrid Holdings, Inc. (a)		1,252		12,370
Urban Outfitters, Inc. (a)		6,716		197,182
Wolverine World Wide, Inc.		7,892		227,368
				2,126,885

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Auto Manufacturers — 0.3%
Arcimoto, Inc. (a)		2,709	$	21,076
Blue Bird Corp. (a)		1,565		24,477
Canoo, Inc. (a) (b)		10,394		80,242
Fisker, Inc. (a)		15,923		250,469
Hyliion Holdings Corp. (a)		11,526		71,461
Lordstown Motors Corp. Class A (a) (b)		15,122		52,171
Nikola Corp. (a) (b)		22,221		219,321
REV Group, Inc.		2,792		39,507
Wabash National Corp.		4,847		94,613
Workhorse Group, Inc. (a)		11,858		51,701
XL Fleet Corp. (a) (b)		3,429		11,350
				916,388
Auto Parts & Equipment — 1.5%
Adient PLC (a)		9,243		442,555
Aeva Technologies, Inc. (a)		10,306		77,913
American Axle & Manufacturing Holdings, Inc. (a)		11,020		102,817
Commercial Vehicle Group, Inc. (a)		3,128		25,212
Cooper-Standard Holding, Inc. (a)		1,649		36,954
Dana, Inc.		14,156		323,040
Dorman Products, Inc. (a)		2,576		291,114
Douglas Dynamics, Inc.		2,237		87,377
Fox Factory Holding Corp. (a)		4,124		701,492
Gentherm, Inc. (a)		3,238		281,382
The Goodyear Tire & Rubber Co. (a)		26,981		575,235
Meritor, Inc. (a)		6,639		164,514
Methode Electronics, Inc.		3,747		184,240
Miller Industries, Inc.		1,102		36,807
Modine Manufacturing Co. (a)		4,910		49,542
Motorcar Parts of America, Inc. (a)		1,863		31,801
Romeo Power, Inc. (a)		12,357		45,103
The Shyft Group, Inc.		3,382		166,158
Standard Motor Products, Inc.		2,046		107,190
Tenneco, Inc. Class A (a)		6,687		75,563
Titan International, Inc. (a)		5,007		54,877
Velodyne Lidar, Inc. (a)		7,509		34,842
Visteon Corp. (a)		2,700		300,078
XPEL, Inc. (a)		1,753		119,695
				4,315,501
Distribution & Wholesale — 0.9%
A-Mark Precious Metals, Inc.		857		52,363
Avient Corp.		8,892		497,507
EVI Industries, Inc. (a)		555		17,333
G-III Apparel Group Ltd. (a)		4,327		119,598
Global Industrial Co.		1,250		51,125
H&E Equipment Services, Inc.		3,147		139,318
Ideanomics, Inc. (a) (b)		42,972		51,566
KAR Auction Services, Inc. (a)		11,744		183,441
Resideo Technologies, Inc. (a)		14,098		366,971
ScanSource, Inc. (a)		2,480		86,998
Titan Machinery, Inc. (a)		1,904		64,146
Veritiv Corp. (a)		1,399		171,475
VSE Corp.		1,040		63,378

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
WESCO International, Inc. (a)		4,350	$	572,417
				2,437,636
Entertainment — 1.6%
Accel Entertainment, Inc. (a)		5,537		72,092
AMC Entertainment Holdings, Inc. Class A (a)		50,377		1,370,254
Bally's Corp. (a)		3,191		121,449
Chicken Soup For The Soul Entertainment, Inc. (a)		693		9,591
Cinemark Holdings, Inc. (a)		10,557		170,179
Eros STX Global Corp. (a)		30,642		7,345
Esports Technologies, Inc. (a)		1,079		22,184
Everi Holdings, Inc. (a)		8,351		178,294
GAN Ltd. (a)		3,985		36,622
Golden Entertainment, Inc. (a)		1,676		84,688
Golden Nugget Online Gaming, Inc. (a)		3,910		38,905
Hall of Fame Resort & Entertainment Co. (a) (b)		5,532		8,409
IMAX Corp. (a)		4,914		87,666
International Game Technology PLC (b)		9,745		281,728
Liberty Media Corp-Liberty Braves Class A (a) (b)		979		28,146
Liberty Media Corp-Liberty Braves Class C (a)		3,604		101,272
Lions Gate Entertainment Corp. Class A (a) (b)		5,747		95,630
Lions Gate Entertainment Corp. Class B (a)		11,505		177,062
Madison Square Garden Entertainment Corp. (a) (b)		2,556		179,789
Monarch Casino & Resort, Inc. (a)		1,281		94,730
NEOGAMES SA (a)		1,005		27,919
RCI Hospitality Holdings, Inc.		820		63,862
Red Rock Resorts, Inc. Class A		5,825		320,433
Rush Street Interactive, Inc. (a)		5,111		84,332
Scientific Games Corp. Class A (a)		9,387		627,333
SeaWorld Entertainment, Inc. (a)		5,024		325,857
				4,615,771
Food Services — 0.1%
Healthcare Services Group, Inc.		7,335		130,490
Sovos Brands, Inc. (a)		2,487		37,429
				167,919
Home Builders — 1.5%
Beazer Homes USA, Inc. (a)		2,877		66,804
Cavco Industries, Inc. (a)		898		285,250
Century Communities, Inc.		2,914		238,336
Forestar Group, Inc. (a)		1,694		36,844
Green Brick Partners, Inc. (a)		3,035		92,052
Hovnanian Enterprises, Inc. Class A (a)		503		64,027
Installed Building Products, Inc.		2,313		323,172
KB Home		7,777		347,865
Landsea Homes Corp. (a)		1,022		7,481
LCI Industries		2,416		376,582
LGI Homes, Inc. (a)		2,109		325,798
M.D.C. Holdings, Inc.		5,559		310,359
M/I Homes, Inc. (a)		2,805		174,415
Meritage Home Corp. (a)		3,611		440,759
Skyline Champion Corp. (a)		5,121		404,457
Taylor Morrison Home Corp. (a)		11,689		408,647
TRI Pointe Group, Inc. (a)		10,890		303,722

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Winnebago Industries, Inc.		3,146	$	235,698
				4,442,268
Home Furnishing — 0.5%
Aterian, Inc. (a)		2,541		10,444
Casper Sleep, Inc. (a) (b)		2,861		19,111
Daktronics, Inc. (a)		3,621		18,286
Ethan Allen Interiors, Inc.		2,212		58,153
Flexsteel Industries, Inc. (b)		646		17,352
Hamilton Beach Brands Holding Co. Class A		723		10,382
Hooker Furnishings Corp. (b)		1,145		26,656
iRobot Corp. (a)		2,618		172,474
The Lovesac Co. (a)		1,248		82,693
MillerKnoll, Inc.		7,241		283,775
Purple Innovation, Inc. (a) (b)		5,655		75,042
Sleep Number Corp. (a)		2,160		165,456
Snap One Holdings Corp. (a)		1,315		27,720
Sonos, Inc. (a) (b)		11,729		349,524
Traeger, Inc. (a)		2,235		27,178
Universal Electronics, Inc. (a)		1,244		50,693
VOXX International Corp. (a)		1,508		15,336
Weber, Inc. Class A		1,679		21,709
				1,431,984
Housewares — 0.0%
Lifetime Brands, Inc.		1,251		19,979
Tupperware Brands Corp. (a)		4,773		72,979
				92,958
Leisure Time — 0.5%
Acushnet Holdings Corp.		3,384		179,623
Callaway Golf Co. (a)		11,285		309,660
Camping World Holdings, Inc. Class A (b)		4,077		164,711
Clarus Corp.		2,568		71,185
Drive Shack, Inc. (a)		8,323		11,902
Escalade, Inc.		991		15,648
F45 Training Holdings, Inc. Common Stock Usd.00005 (a)		2,027		22,074
Johnson Outdoors, Inc. Class A		514		48,157
Liberty TripAdvisor Holdings, Inc. Class A (a)		7,070		15,342
Life Time Group Holdings, Inc. (a)		3,844		66,155
Lindblad Expeditions Holdings, Inc. (a) (b)		3,011		46,971
Malibu Boats, Inc. Class A (a)		2,030		139,522
Marine Products Corp. (b)		791		9,887
MasterCraft Boat Holdings, Inc. (a)		1,845		52,269
Nautilus, Inc. (a)		2,975		18,237
OneSpaWorld Holdings Ltd. (a)		5,188		51,984
OneWater Marine, Inc. Class A		1,007		61,397
Vista Outdoor, Inc. (a)		5,593		257,669
Xponential Fitness, Inc. (a)		902		18,437
				1,560,830
Lodging — 0.2%
Bluegreen Vacations Holding Corp. (a)		1,384		48,578
Century Casinos, Inc. (a)		2,666		32,472
Full House Resorts, Inc. (a)		3,249		39,345
Hilton Grand Vacations, Inc. (a)		8,343		434,754

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
The Marcus Corp. (a)		2,269	$	40,524
Target Hospitality Corp. (a)		2,544		9,057
				604,730
Office Furnishings — 0.2%
CompX International, Inc.		141		3,168
HNI Corp.		4,273		179,680
Interface, Inc.		5,735		91,473
Kimball International, Inc. Class B		3,536		36,173
Steelcase, Inc. Class A		8,341		97,757
				408,251
Retail — 5.0%
Abercrombie & Fitch Co. Class A (a)		5,705		198,705
Academy Sports & Outdoors, Inc. (a)		7,576		332,586
America's Car-Mart, Inc. (a)		578		59,187
American Eagle Outfitters, Inc. (b)		14,840		375,749
Arko Corp. (a)		11,789		103,390
Asbury Automotive Group, Inc. (a)		2,263		390,888
Aspen Aerogels, Inc. (a)		2,154		107,248
Barnes & Noble Education, Inc. (a)		4,413		30,053
Bassett Furniture Industries, Inc.		922		15,462
Beacon Roofing Supply, Inc. (a)		5,427		311,238
Bed Bath & Beyond, Inc. (a)		9,915		144,561
Big 5 Sporting Goods Corp. (b)		2,069		39,332
Big Lots, Inc.		3,138		141,367
Biglari Holdings, Inc. Class B (a)		78		11,120
BJ's Restaurants, Inc. (a)		2,230		77,047
BJ's Wholesale Club Holdings, Inc. (a)		13,384		896,327
Bloomin' Brands, Inc. (a)		8,666		181,813
BlueLinx Holdings, Inc. (a)		907		86,854
Boot Barn Holdings, Inc. (a)		2,850		350,693
Brinker International, Inc. (a)		4,449		162,789
The Buckle, Inc.		2,912		123,207
Caleres, Inc.		3,631		82,351
Cannae Holdings, Inc. (a)		8,239		289,601
CarLotz, Inc. (a)		7,067		16,042
Carrols Restaurant Group, Inc.		3,351		9,919
The Cato Corp. Class A		1,963		33,685
The Cheesecake Factory, Inc. (a)		4,505		176,371
Chico's FAS, Inc. (a)		11,818		63,581
The Children's Place, Inc. (a)		1,374		108,944
Chuy's Holdings, Inc. (a)		1,954		58,855
Citi Trends, Inc. (a) (b)		840		79,590
Clean Energy Fuels Corp. (a)		15,147		92,851
Conn's, Inc. (a) (b)		1,772		41,677
The Container Store Group, Inc. (a)		3,156		31,497
Cracker Barrel Old Country Store, Inc.		2,302		296,129
Dave & Buster's Entertainment, Inc. (a)		4,226		162,278
Del Taco Restaurants, Inc.		2,903		36,142
Denny's Corp. (a)		6,075		97,200
Designer Brands, Inc. Class A (a)		5,875		83,484
Dillard's, Inc. Class A		570		139,661
Dine Brands Global, Inc.		1,597		121,069
Duluth Holdings, Inc. Class B (a)		1,180		17,912
El Pollo Loco Holdings, Inc. (a)		1,885		26,748
Fiesta Restaurant Group, Inc. (a)		1,715		18,882

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
First Watch Restaurant Group, Inc. (a)		1,051	$	17,615
FirstCash Holdings, Inc.		3,918		293,106
Franchise Group, Inc.		2,770		144,483
Genesco, Inc. (a)		1,447		92,854
GMS, Inc. (a)		4,155		249,757
Group 1 Automotive, Inc.		1,713		334,412
GrowGeneration Corp. (a)		5,325		69,491
Guess?, Inc.		3,981		94,270
Haverty Furniture Cos., Inc.		1,595		48,759
Hibbett, Inc.		1,446		104,011
Jack in the Box, Inc.		2,140		187,207
JOANN, Inc.		1,180		12,248
Kirkland's, Inc. (a)		1,292		19,290
Kura Sushi USA, Inc. Class A (a)		397		32,094
La-Z-Boy, Inc.		4,278		155,334
Lazydays Holdings, Inc. (a)		725		15,617
Lumber Liquidators Holdings, Inc. (a)		2,812		48,001
Macy's, Inc.		30,666		802,836
MarineMax, Inc. (a)		2,065		121,918
MedAvail Holdings, Inc. (a)		1,307		1,830
Movado Group, Inc.		1,529		63,958
Murphy USA, Inc.		2,359		470,007
National Vision Holdings, Inc. (a)		7,960		382,000
Noodles & Co. (a)		3,986		36,153
Nu Skin Enterprises, Inc. Class A		4,835		245,376
The ODP Corp. (a)		4,495		176,564
The ONE Group Hospitality, Inc. (a)		2,053		25,888
OptimizeRx Corp. (a)		1,677		104,158
Papa John's International, Inc.		3,226		430,574
Party City Holdco, Inc. (a) (b)		10,856		60,468
PC Connection, Inc.		1,088		46,925
PetMed Express, Inc. (b)		1,935		48,878
Portillo's, Inc. Class A (a)		2,283		85,704
PriceSmart, Inc.		2,297		168,072
Red Robin Gourmet Burgers, Inc. (a)		1,542		25,489
Regis Corp. (a) (b)		4,189		7,289
Rite Aid Corp. (a) (b)		5,404		79,385
Rush Enterprises, Inc. Class A		4,085		227,289
Rush Enterprises, Inc. Class B		642		34,649
Ruth's Hospitality Group, Inc. (a)		3,236		64,396
Sally Beauty Holdings, Inc. (a)		10,970		202,506
Shake Shack, Inc. Class A (a)		3,645		263,023
Shift Technologies, Inc. (a) (b)		6,140		20,937
Shoe Carnival, Inc.		1,735		67,804
Signet Jewelers Ltd.		5,147		447,943
Sonic Automotive, Inc. Class A		2,092		103,449
Sportsman's Warehouse Holdings, Inc. (a)		4,272		50,410
Texas Roadhouse, Inc.		6,843		610,943
Tilly's, Inc. Class A		2,250		36,248
TravelCenters of America, Inc. (a)		1,226		63,286
Vera Bradley, Inc. (a)		2,535		21,573
Wingstop, Inc.		2,914		503,539
Winmark Corp.		342		84,915
World Fuel Services Corp.		6,107		161,652
Zumiez, Inc. (a) (b)		2,062		98,955
				14,589,623

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Textiles — 0.1%
UniFirst Corp.		1,469	$	309,078
Toys, Games & Hobbies — 0.0%
Funko, Inc. Class A (a)		2,599		48,861
				38,990,834
Consumer, Non-cyclical — 24.1%
Agriculture — 0.3%
22nd Century Group, Inc. (a) (b)		15,991		49,412
The Andersons, Inc.		3,107		120,272
AppHarvest, Inc. (a) (b)		6,927		26,946
Cadiz, Inc. (a)		2,044		7,890
Fresh Del Monte Produce, Inc.		3,312		91,411
Greenlane Holdings, Inc. Class A (a)		1,759		1,696
Limoneira Co.		1,539		23,085
Tejon Ranch Co. (a)		2,070		39,496
Turning Point Brands, Inc.		1,430		54,025
Universal Corp.		2,373		130,325
Vector Group Ltd.		13,962		160,284
Vital Farms, Inc. (a)		2,407		43,470
				748,312
Beverages — 0.4%
Celsius Holdings, Inc. (a) (b)		5,261		392,313
Coca-Cola Consolidated, Inc.		458		283,589
The Duckhorn Portfolio, Inc. (a) (b)		3,496		81,597
MGP Ingredients, Inc.		1,386		117,796
National Beverage Corp.		2,318		105,075
NewAge, Inc. (a)		13,019		13,409
Primo Water Corp.		15,276		269,316
The Vita Coco Co., Inc. (a)		1,042		11,639
Zevia PBC (a) (b)		1,025		7,226
				1,281,960
Biotechnology — 7.5%
2seventy bio, Inc. (a)		2,219		56,873
4D Molecular Therapeutics, Inc. (a)		2,720		59,677
89bio, Inc. (a) (b)		959		12,534
9 Meters Biopharma, Inc. (a)		21,721		21,258
Absci Corp. (a)		1,361		11,160
ACADIA Pharmaceuticals, Inc. (a)		11,672		272,424
Acumen Pharmaceuticals, Inc. (a)		904		6,111
Adagio Therapeutics, Inc. (a)		2,085		15,137
Adicet Bio, Inc. (a)		2,045		35,767
Adverum Biotechnologies, Inc. (a)		8,688		15,291
Aerovate Therapeutics, Inc. (a)		982		11,578
Affimed NV (a)		11,427		63,077
Agenus, Inc. (a)		21,401		68,911
Akero Therapeutics, Inc. (a)		2,524		53,383
Akouos, Inc. (a)		2,334		19,839
Akoya Biosciences, Inc. (a)		1,301		19,918
Albireo Pharma, Inc. (a) (b)		1,676		39,034
Aldeyra Therapeutics, Inc. (a)		4,816		19,264
Aligos Therapeutics, Inc. (a)		2,088		24,785
Allakos, Inc. (a)		3,450		33,776
Allogene Therapeutics, Inc. (a)		6,643		99,114

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Allovir, Inc. (a)		2,893	$	37,435
Alpha Teknova, Inc. (a)		681		13,947
Alpine Immune Sciences, Inc. (a)		1,145		15,858
Altimmune, Inc. (a)		3,937		36,063
ALX Oncology Holdings, Inc. (a)		1,738		37,350
Amicus Therapeutics, Inc. (a)		25,628		296,003
AnaptysBio, Inc. (a)		1,894		65,816
Anavex Life Sciences Corp. (a) (b)		6,549		113,560
Angion Biomedica Corp. (a)		2,095		6,076
ANI Pharmaceuticals, Inc. (a)		1,066		49,121
Annexon, Inc. (a)		3,058		35,136
Apellis Pharmaceuticals, Inc. (a)		6,972		329,636
Applied Molecular Transport, Inc. (a)		2,484		34,726
Applied Therapeutics, Inc. (a)		1,719		15,385
Arbutus Biopharma Corp. (a) (b)		7,864		30,591
Arcturus Therapeutics Holdings, Inc. (a)		2,077		76,870
Arcus Biosciences, Inc. (a)		4,369		176,813
Arcutis Biotherapeutics, Inc. (a)		2,711		56,226
Ardelyx, Inc. (a)		8,661		9,527
Arena Pharmaceuticals, Inc. (a)		6,037		561,079
Arrowhead Pharmaceuticals, Inc. (a)		9,893		655,906
Atara Biotherapeutics, Inc. (a)		8,484		133,708
Atea Pharmaceuticals, Inc. (a)		6,339		56,671
Athersys, Inc. (a) (b)		20,322		18,343
Athira Pharma, Inc. (a) (b)		3,161		41,188
Atossa Therapeutics, Inc. (a)		11,402		18,243
Atreca, Inc. Class A (a)		2,509		7,602
Aura Biosciences, Inc. (a)		524		8,898
Avalo Therapeutics, Inc. (a)		5,371		9,131
Avid Bioservices, Inc. (a)		5,894		171,987
Avidity Biosciences, Inc. (a)		3,679		87,450
Avrobio, Inc. (a)		3,665		14,110
Axsome Therapeutics, Inc. (a) (b)		2,714		102,535
Beam Therapeutics, Inc. (a)		4,995		398,052
Berkeley Lights, Inc. (a) (b)		4,787		87,028
BioAtla, Inc. (a)		1,540		30,230
BioCryst Pharmaceuticals, Inc. (a)		17,555		243,137
Biodesix, Inc. (a)		1,174		6,210
Biohaven Pharmaceutical Holding Co. Ltd. (a)		5,435		748,997
Biomea Fusion, Inc. (a)		2,100		15,645
Black Diamond Therapeutics, Inc. (a) (b)		2,231		11,891
Bluebird Bio, Inc. (a)		6,636		66,294
Blueprint Medicines Corp. (a)		5,712		611,812
Bolt Biotherapeutics, Inc. (a) (b)		2,223		10,893
Bridgebio Pharma, Inc. (a) (b)		10,356		172,738
Brooklyn ImmunoTherapeutics, Inc. (a)		2,916		12,160
C4 Therapeutics, Inc. (a)		3,773		121,491
Cara Therapeutics, Inc. (a)		4,361		53,117
Cardiff Oncology, Inc. (a) (b)		3,708		22,285
Caribou Biosciences, Inc. (a)		1,903		28,716
Cassava Sciences, Inc. (a) (b)		3,735		163,219
CEL-SCI Corp. (a) (b)		3,565		25,312
Celldex Therapeutics, Inc. (a)		4,488		173,416
Century Therapeutics, Inc. (a)		1,162		18,429
Cerevel Therapeutics Holdings, Inc. (a)		3,958		128,318
ChemoCentryx, Inc. (a)		5,272		191,954
Chinook Therapeutics, Inc. (a)		3,803		62,027
ChromaDex Corp. (a)		4,626		17,301

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Clene, Inc. (a)		1,884	$	7,724
Codex DNA, Inc. (a)		793		8,564
Codiak Biosciences, Inc. (a) (b)		1,548		17,245
Cogent Biosciences, Inc. (a)		3,684		31,609
Cortexyme, Inc. (a) (b)		1,974		24,912
Crinetics Pharmaceuticals, Inc. (a)		4,488		127,504
Cue Biopharma, Inc. (a)		3,053		34,529
Cullinan Management, Inc. (a)		2,536		39,130
Curis, Inc. (a)		8,606		40,965
Cymabay Therapeutics, Inc. (a)		6,854		23,167
Cyteir Therapeutics, Inc. (a)		814		9,255
Cytek Biosciences, Inc. (a)		1,592		25,981
CytomX Therapeutics, Inc. (a)		6,444		27,903
Day One Biopharmaceuticals, Inc. (a) (b)		1,086		18,299
Deciphera Pharmaceuticals, Inc. (a)		3,905		38,152
Denali Therapeutics, Inc. (a)		8,874		395,780
Design Therapeutics, Inc. (a)		2,589		55,430
DICE Therapeutics, Inc. (a)		1,354		34,270
Dynavax Technologies Corp. (a)		10,523		148,059
Dyne Therapeutics, Inc. (a)		2,942		34,980
Edgewise Therapeutics, Inc. (a)		3,770		57,606
Editas Medicine, Inc. (a)		6,677		177,274
Eiger BioPharmaceuticals, Inc. (a)		3,109		16,136
Eliem Therapeutics, Inc. (a) (b)		677		7,081
Emergent BioSolutions, Inc. (a)		4,784		207,960
Entrada Therapeutics, Inc. (a)		887		15,185
Epizyme, Inc. (a)		8,750		21,875
Erasca, Inc. (a)		2,048		31,908
Esperion Therapeutics, Inc. (a) (b)		2,572		12,860
Evelo Biosciences, Inc. (a) (b)		3,030		18,392
Evolus, Inc. (a)		3,221		20,969
Exagen, Inc. (a)		1,006		11,700
EyePoint Pharmaceuticals, Inc. (a)		2,095		25,643
Fate Therapeutics, Inc. (a)		7,921		463,458
FibroGen, Inc. (a)		8,409		118,567
Finch Therapeutics Group, Inc. (a)		758		7,557
Forma Therapeutics Holdings, Inc. (a)		3,332		47,381
Forte Biosciences, Inc. (a) (b)		1,006		2,153
Frequency Therapeutics, Inc. (a)		3,101		15,908
Gemini Therapeutics, Inc. (a)		2,082		6,059
Generation Bio Co., (a)		4,304		30,472
Geron Corp. (a) (b)		29,963		36,555
Global Blood Therapeutics, Inc. (a)		6,050		177,083
Gossamer Bio, Inc. (a)		6,109		69,093
Graphite Bio, Inc. (a)		1,600		19,888
Greenwich Lifesciences, Inc. (a)		396		9,635
GT Biopharma, Inc. (a)		1,834		5,594
Halozyme Therapeutics, Inc. (a)		13,515		543,438
Harvard Bioscience, Inc. (a)		3,836		27,044
Homology Medicines, Inc. (a)		4,136		15,055
Humanigen, Inc. (a)		4,487		16,692
iBio, Inc. (a)		21,640		11,880
Icosavax, Inc. (a)		1,326		30,339
IGM Biosciences, Inc. (a)		801		23,493
Ikena Oncology, Inc. (a) (b)		2,696		33,808
Imago Biosciences, Inc. (a)		961		22,785
Immunic, Inc. (a)		1,855		17,752
ImmunityBio, Inc. (a)		6,695		40,706

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
ImmunoGen, Inc. (a)		19,313	$	143,302
Immunovant, Inc. (a)		3,974		33,858
Impel Neuropharma, Inc. (a) (b)		508		4,384
Infinity Pharmaceuticals, Inc. (a)		8,520		19,170
Inhibrx, Inc. (a)		2,725		119,001
Innoviva, Inc. (a)		4,262		73,519
Inovio Pharmaceuticals, Inc. (a)		20,187		100,733
Inozyme Pharma, Inc. (a)		1,391		9,487
Insmed, Inc. (a)		11,535		314,213
Instil Bio, Inc. (a) (b)		5,272		90,204
Intercept Pharmaceuticals, Inc. (a) (b)		2,430		39,585
Intra-Cellular Therapies, Inc. (a)		6,887		360,466
IsoPlexis Corp. (a) (b)		795		7,306
iTeos Therapeutics, Inc. (a)		1,986		92,468
IVERIC bio, Inc. (a)		11,218		187,565
Janux Therapeutics, Inc. (a) (b)		1,291		25,471
Kaleido Biosciences, Inc. (a) (b)		1,851		4,424
Karuna Therapeutics, Inc. (a)		2,163		283,353
Karyopharm Therapeutics, Inc. (a)		7,058		45,383
KemPharm, Inc. (a) (b)		2,827		24,623
Keros Therapeutics, Inc. (a)		1,538		89,988
Kezar Life Sciences, Inc. (a)		3,356		56,112
Kiniksa Pharmaceuticals Ltd. Class A (a)		2,882		33,921
Kinnate Biopharma, Inc. (a)		2,524		44,725
Kodiak Sciences, Inc. (a)		3,266		276,891
Kronos Bio, Inc. (a)		3,809		51,764
Krystal Biotech, Inc. (a)		1,751		122,482
Kymera Therapeutics, Inc. (a)		3,356		213,072
Lexicon Pharmaceuticals, Inc. (a)		6,727		26,504
Ligand Pharmaceuticals, Inc. (a)		1,469		226,902
Lineage Cell Therapeutics, Inc. (a)		12,234		29,973
Lucid Diagnostics, Inc. (a)		508		2,728
MacroGenics, Inc. (a)		5,863		94,101
Magenta Therapeutics, Inc. (a)		2,928		12,971
MaxCyte, Inc. (a) (b)		9,343		95,205
MEI Pharma, Inc. (a)		10,610		28,329
MeiraGTx Holdings PLC (a) (b)		2,926		69,463
Mersana Therapeutics, Inc. (a)		7,013		43,621
Mind Medicine MindMed, Inc. (a)		34,176		47,163
MiNK Therapeutics, Inc. (a)		190		847
Molecular Templates, Inc. (a)		3,629		14,226
Monte Rosa Therapeutics, Inc. (a)		1,142		23,320
Mustang Bio, Inc. (a)		6,638		11,019
Myriad Genetics, Inc. (a)		7,711		212,824
NeoGenomics, Inc. (a)		11,049		376,992
NGM Biopharmaceuticals, Inc. (a)		3,094		54,795
Nkarta, Inc. (a)		1,392		21,367
Nurix Therapeutics, Inc. (a)		3,089		89,427
Nuvalent, Inc., Class A (a)		1,058		20,144
Nuvation Bio, Inc. (a)		15,501		131,758
Olema Pharmaceuticals, Inc. (a)		2,496		23,363
Omega Therapeutics, Inc. (a)		721		8,169
Omeros Corp. (a) (b)		5,912		38,014
Oncocyte Corp. (a)		5,900		12,803
Oncorus, Inc. (a)		2,055		10,830
Oncternal Therapeutics, Inc. (a)		4,400		9,988
Organogenesis Holdings, Inc. (a)		3,788		35,001
Oyster Point Pharma, Inc. (a)		1,075		19,630

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Phathom Pharmaceuticals, Inc. (a)		2,012	$	39,576
Pliant Therapeutics, Inc. (a)		2,387		32,225
Portage Biotech, Inc. (a)		478		5,129
Poseida Therapeutics, Inc. (a)		2,838		19,327
Praxis Precision Medicines, Inc. (a)		3,236		63,749
Precigen, Inc. (a)		9,418		34,941
Precision BioSciences, Inc. (a)		4,855		35,927
Prelude Therapeutics, Inc. (a)		1,083		13,483
Prothena Corp. PLC (a)		3,528		174,283
Provention Bio, Inc. (a) (b)		5,506		30,944
PTC Therapeutics, Inc. (a)		6,752		268,932
Puma Biotechnology, Inc. (a)		3,198		9,722
Pyxis Oncology, Inc. (a)		1,024		11,233
Radius Health, Inc. (a)		4,647		32,157
Rain Therapeutics, Inc. (a)		1,543		19,874
Rallybio Corp. (a)		734		7,002
RAPT Therapeutics, Inc. (a) (b)		2,094		76,913
Recursion Pharmaceuticals, Inc. Class A (a)		11,245		192,627
REGENXBIO, Inc. (a)		3,855		126,058
Relay Therapeutics, Inc. (a)		6,827		209,657
Replimune Group, Inc. (a)		2,937		79,593
Revolution Medicines, Inc. (a)		5,803		146,062
Rigel Pharmaceuticals, Inc. (a)		16,743		44,369
Rocket Pharmaceuticals, Inc. (a)		4,018		87,713
Rubius Therapeutics, Inc. (a)		4,510		43,657
Sana Biotechnology, Inc. (a) (b)		8,441		130,667
Sangamo Therapeutics, Inc. (a)		11,716		87,870
Scholar Rock Holding Corp. (a)		2,728		67,764
Seelos Therapeutics, Inc. (a)		9,529		15,532
Seer, Inc. (a) (b)		4,065		92,723
Selecta Biosciences, Inc. (a)		8,870		28,916
Sensei Biotherapeutics, Inc. (a)		2,046		11,867
Sesen Bio, Inc. (a) (b)		19,541		15,926
Shattuck Labs, Inc. (a)		2,631		22,390
Sigilon Therapeutics, Inc. (a)		1,550		4,278
Silverback Therapeutics, Inc. (a)		2,010		13,387
Singular Genomics Systems, Inc. (a)		1,158		13,386
Solid Biosciences, Inc. (a)		5,726		10,021
Sorrento Therapeutics, Inc. (a) (b)		29,139		135,496
SpringWorks Therapeutics, Inc. (a)		2,844		176,271
Spruce Biosciences, Inc. (a)		876		3,907
SQZ Biotechnologies Co. (a)		2,253		20,119
Stoke Therapeutics, Inc. (a)		1,869		44,837
Surface Oncology, Inc. (a) (b)		3,384		16,176
Sutro Biopharma, Inc. (a)		4,260		63,389
Syndax Pharmaceuticals, Inc. (a)		4,440		97,192
Talaris Therapeutics, Inc. (a)		2,071		31,666
Tarsus Pharmaceuticals, Inc. (a)		821		18,473
Taysha Gene Therapies, Inc. (a) (b)		2,207		25,712
TCR2 Therapeutics, Inc. (a)		3,057		14,246
Tenaya Therapeutics, Inc. (a)		1,360		25,772
Terns Pharmaceuticals, Inc. (a)		1,328		9,389
TG Therapeutics, Inc. (a)		12,660		240,540
Theravance Biopharma, Inc. (a)		5,893		65,118
Theseus Pharmaceuticals, Inc. (a)		1,113		14,113
TransMedics Group, Inc. (a)		2,545		48,762
Travere Therapeutics, Inc. (a)		5,757		178,697
Turning Point Therapeutics, Inc. (a)		4,489		214,125

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Twist Bioscience Corp. (a)		4,605	$	356,381
Tyra Biosciences, Inc. (a)		1,178		16,574
UroGen Pharma Ltd. (a) (b)		1,927		18,326
Vaxart, Inc. (a)		11,752		73,685
VBI Vaccines, Inc. (a)		18,256		42,719
Ventyx Biosciences, Inc. (a)		1,011		20,078
Vera Therapeutics, Inc. (a)		960		25,651
Veracyte, Inc. (a)		6,576		270,931
Verastem, Inc. (a)		16,890		34,624
Vericel Corp. (a)		4,540		178,422
Veru, Inc. (a)		6,401		37,702
Verve Therapeutics, Inc. (a) (b)		1,551		57,185
Viking Therapeutics, Inc. (a)		6,790		31,234
Vincerx Pharma, Inc. (a)		1,609		16,396
Vir Biotechnology, Inc. (a)		5,864		245,526
Viracta Therapeutics, Inc. (a)		3,632		13,257
VistaGen Therapeutics, Inc. (a)		19,263		37,563
Vor BioPharma, Inc. (a)		1,851		21,509
WaVe Life Sciences Ltd. (a)		4,210		13,219
Werewolf Therapeutics, Inc. (a)		2,567		30,573
XBiotech, Inc.		1,483		16,506
Xencor, Inc. (a)		5,479		219,817
Xilio Therapeutics, Inc. (a)		714		11,424
XOMA Corp. (a)		598		12,468
Y-mAbs Therapeutics, Inc. (a)		3,431		55,617
Zentalis Pharmaceuticals, Inc. (a)		3,544		297,909
ZIOPHARM Oncology, Inc. (a)		20,753		22,621
				21,863,759
Commercial Services — 4.8%
2U, Inc. (a)		7,092		142,336
The Aaron's Co., Inc.		3,016		74,344
ABM Industries, Inc.		6,548		267,486
Acacia Research Corp. (a) (b)		4,850		24,881
Adtalem Global Education, Inc. (a)		4,840		143,070
AirSculpt Technologies, Inc. (a)		621		10,675
Alarm.com Holdings, Inc. (a)		4,605		390,550
Alta Equipment Group, Inc. (a)		1,845		27,011
American Public Education, Inc. (a)		1,824		40,584
AMN Healthcare Services, Inc. (a)		4,602		562,963
API Group Corp. (a) (b)		19,756		509,112
Arlo Technologies, Inc. (a)		8,210		86,123
ASGN, Inc. (a)		4,977		614,162
Avis Budget Group, Inc. (a)		4,034		836,531
Barrett Business Services, Inc.		734		50,690
BrightView Holdings, Inc. (a)		4,022		56,630
The Brink's Co.		4,695		307,851
Carriage Services, Inc.		1,485		95,693
Cass Information Systems, Inc.		1,368		53,790
CBIZ, Inc. (a)		4,764		186,368
Cimpress PLC (a) (b)		1,721		123,241
CoreCivic, Inc. (a)		11,715		116,799
Corvel Corp. (a)		866		180,128
Coursera, Inc. (a)		7,132		174,306
CRA International, Inc.		699		65,259
Cross Country Healthcare, Inc. (a)		3,544		98,381
Custom Truck One Source, Inc. (a) (b)		4,590		36,720
Deluxe Corp.		4,120		132,293

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Emerald Holding, Inc. (a)		2,320	$	9,210
Ennis, Inc.		2,512		49,059
European Wax Center, Inc. (a)		1,280		38,848
EVERTEC, Inc.		5,896		294,682
Evo Payments, Inc. Class A (a)		4,688		120,013
First Advantage Corp. (a)		5,364		102,131
Forrester Research, Inc. (a)		1,109		65,132
Franklin Covey Co. (a)		1,224		56,745
Graham Holdings Co. Class B		373		234,927
Green Dot Corp. Class A (a)		5,235		189,716
The Hackett Group, Inc.		2,410		49,477
HealthEquity, Inc. (a)		7,977		352,902
Heidrick & Struggles International, Inc.		1,906		83,349
Herc Holdings, Inc.		2,434		381,043
HireQuest, Inc.		515		10,382
Huron Consulting Group, Inc. (a)		2,106		105,089
ICF International, Inc.		1,818		186,436
Insperity, Inc.		3,541		418,228
John Wiley & Sons, Inc. Class A		4,194		240,190
Kelly Services, Inc. Class A		3,458		57,991
Kforce, Inc.		1,988		149,537
Korn Ferry		5,267		398,870
Laureate Education, Inc. Class A		9,709		118,838
LiveRamp Holdings, Inc. (a)		6,443		308,942
Marathon Digital Holdings, Inc. (a) (b)		9,313		306,025
Medifast, Inc.		1,122		234,980
MoneyGram International, Inc. (a)		8,799		69,424
Monro, Inc.		3,249		189,319
Multiplan Corp. (a)		37,157		164,606
National Research Corp. Class A		1,373		57,007
Paya Holdings, Inc. Class A (a)		8,251		52,311
Perdoceo Education Corp. (a)		6,933		81,532
Priority Technology Holdings, Inc. (a)		994		7,038
PROG Holdings, Inc. (a)		6,359		286,854
Progyny, Inc. (a)		6,302		317,306
R1 RCM, Inc. (a)		11,575		295,047
Remitly Global, Inc. (a)		1,204		24,826
Rent the Runway, Inc. Class A (a)		1,656		13,496
Rent-A-Center, Inc.		6,426		308,705
Repay Holdings Corp. (a)		8,474		154,820
Resources Connection, Inc.		3,096		55,233
Riot Blockchain, Inc. (a) (b)		8,683		193,891
RR Donnelley & Sons Co. (a)		6,982		78,617
ShotSpotter, Inc. (a)		840		24,797
SP Plus Corp. (a)		2,272		64,116
StoneMor, Inc. (a)		3,165		7,216
Strategic Education, Inc.		2,384		137,891
Stride, Inc. (a)		4,029		134,287
Team, Inc. (a)		2,417		2,635
Textainer Group Holdings Ltd.		4,586		163,766
Transcat, Inc. (a)		695		64,239
TriNet Group, Inc. (a)		3,951		376,372
Triton International Ltd.		6,500		391,495
TrueBlue, Inc. (a)		3,457		95,655
Vectrus, Inc. (a)		1,136		51,995
Viad Corp. (a)		2,003		85,708
Vivint Smart Home, Inc. (a)		9,031		88,323
Willdan Group, Inc. (a)		1,093		38,474

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
WW International, Inc. (a) (b)		5,207	$	83,989
				14,131,709
Cosmetics & Personal Care — 0.3%
The Beauty Health Co. (a) (b)		8,390		202,702
Edgewell Personal Care Co.		5,284		241,532
elf Beauty, Inc. (a)		4,714		156,552
The Honest Co., Inc. (a) (b)		8,286		67,034
Inter Parfums, Inc.		1,754		187,503
Revlon, Inc. Class A (a)		722		8,187
				863,510
Food — 1.6%
AquaBounty Technologies, Inc. (a)		5,135		10,783
B&G Foods, Inc.		6,263		192,462
BellRing Brands, Inc. Class A (a)		3,935		112,265
Cal-Maine Foods, Inc.		3,965		146,665
Calavo Growers, Inc.		1,682		71,317
The Chefs' Warehouse, Inc. (a)		3,074		102,364
HF Foods Group, Inc. (a)		3,586		30,338
Hostess Brands, Inc. (a)		13,459		274,833
Ingles Markets, Inc. Class A		1,373		118,545
J&J Snack Foods Corp.		1,422		224,619
John B Sanfilippo & Son, Inc.		875		78,890
Krispy Kreme, Inc.		2,179		41,227
Laird Superfood, Inc. (a) (b)		605		7,889
Lancaster Colony Corp.		1,846		305,698
Landec Corp. (a) (b)		2,586		28,705
Mission Produce, Inc. (a)		3,644		57,211
Nathan's Famous, Inc.		280		16,349
Natural Grocers by Vitamin Cottage, Inc.		921		13,124
Performance Food Group Co. (a)		14,806		679,447
Sanderson Farms, Inc.		1,979		378,147
Seneca Foods Corp. Class A (a)		602		28,866
The Simply Good Foods Co. (a)		8,290		344,615
SpartanNash Co.		3,538		91,139
Sprouts Farmers Market, Inc. (a)		11,007		326,688
Tattooed Chef, Inc. (a) (b)		4,648		72,230
Tootsie Roll Industries, Inc.		1,528		55,359
TreeHouse Foods, Inc. (a)		5,085		206,095
United Natural Foods, Inc. (a)		5,440		266,995
Utz Brands, Inc. (b)		5,729		91,378
Village Super Market, Inc. Class A		828		19,367
Weis Markets, Inc.		1,610		106,067
Whole Earth Brands, Inc. (a)		3,713		39,878
				4,539,555
Health Care – Products — 3.8%
Accelerate Diagnostics, Inc. (a)		3,190		16,652
Accuray, Inc. (a)		8,817		42,057
Acutus Medical, Inc. (a) (b)		1,933		6,592
Alphatec Holdings, Inc. (a)		6,965		79,610
AngioDynamics, Inc. (a)		3,654		100,777
Apria, Inc. (a)		1,910		62,266
Apyx Medical Corp. (a)		3,056		39,178
Asensus Surgical, Inc. (a)		23,190		25,741
Aspira Women's Health, Inc. (a)		7,257		12,845

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
AtriCure, Inc. (a)		4,362	$	303,290
Atrion Corp.		138		97,276
Avanos Medical, Inc. (a)		4,725		163,816
Avita Medical, Inc. (a)		2,408		28,848
AxoGen, Inc. (a)		3,787		35,484
Axonics Inc. (a)		4,455		249,480
BioLife Solutions, Inc. (a)		1,010		37,643
Bionano Genomics, Inc. (a)		28,385		84,871
Bioventus, Inc. Class A (a) (b)		2,748		39,819
Butterfly Network, Inc. (a) (b)		12,178		81,471
Cardiovascular Systems, Inc. (a)		3,865		72,585
CareDx, Inc. (a)		4,930		224,216
Castle Biosciences, Inc. (a)		2,100		90,027
Celcuity, Inc. (a)		932		12,293
Cerus Corp. (a)		16,443		111,977
ClearPoint Neuro, Inc. (a)		1,855		20,813
CONMED Corp.		2,830		401,181
CryoLife, Inc. (a)		3,737		76,048
Cue Health, Inc. (a)		1,414		18,962
Cutera, Inc. (a) (b)		1,728		71,401
Cvrx, Inc. (a)		787		9,625
CytoSorbents Corp. (a)		4,071		17,058
Dermtech, Inc. (a) (b)		2,412		38,110
Eargo, Inc. (a) (b)		2,924		14,912
Glaukos Corp. (a)		4,441		197,358
Haemonetics Corp. (a)		4,917		260,798
Hanger, Inc. (a)		3,685		66,809
Inari Medical, Inc. (a)		3,357		306,393
InfuSystem Holdings, Inc. (a)		1,796		30,586
Inogen, Inc. (a)		1,920		65,280
Inspire Medical Systems, Inc. (a)		2,625		603,908
Integer Holdings Corp. (a)		3,190		273,032
Intersect ENT, Inc. (a)		3,285		89,713
Invacare Corp. (a)		3,264		8,878
iRadimed Corp. (a)		620		28,650
iRhythm Technologies, Inc. (a)		2,877		338,594
Lantheus Holdings, Inc. (a)		6,582		190,154
LeMaitre Vascular, Inc.		1,864		93,629
LivaNova PLC (a)		5,216		456,035
Meridian Bioscience, Inc. (a)		4,210		85,884
Merit Medical Systems, Inc. (a)		4,993		311,064
MiMedx Group, Inc. (a)		10,923		65,975
NanoString Technologies, Inc. (a)		4,434		187,248
Natus Medical, Inc. (a)		3,320		78,784
Neogen Corp. (a)		10,507		477,123
NeuroPace, Inc. (a)		679		6,844
Nevro Corp. (a)		3,372		273,368
NuVasive, Inc. (a)		5,033		264,132
Omnicell, Inc. (a)		4,276		771,562
OraSure Technologies, Inc. (a) (b)		7,029		61,082
Ortho Clinical Diagnostics Holdings PLC Class H (a)		11,773		251,825
Orthofix Medical, Inc. (a)		1,859		57,796
OrthoPediatrics Corp. (a)		1,362		81,529
Pacific Biosciences of California, Inc. (a)		18,970		388,126
Paragon 28, Inc. (a)		871		15,408
PAVmed, Inc. (a)		7,107		17,483
PROCEPT BioRobotics Corp. (a)		698		17,457
Pulmonx Corp. (a)		2,576		82,612

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Pulse Biosciences, Inc. (a)		1,377	$	20,393
Quanterix Corp. (a)		3,015		127,836
Quotient Ltd. (a) (b)		7,865		20,370
Rapid Micro Biosystems, Inc., Class A (a)		771		8,203
Retractable Technologies, Inc. (a) (b)		1,671		11,580
RxSight, Inc. (a)		809		9,101
SeaSpine Holdings Corp. (a)		3,112		42,385
Sera Prognostics, Inc., Class A (a)		459		3,153
Shockwave Medical, Inc. (a)		3,294		587,419
SI-BONE, Inc. (a)		3,199		71,050
Sientra, Inc. (a)		5,598		20,545
Silk Road Medical, Inc. (a)		3,354		142,914
STAAR Surgical Co. (a)		4,637		423,358
Stereotaxis, Inc. (a)		4,850		30,070
Surmodics, Inc. (a)		1,328		63,943
Tactile Systems Technology, Inc. (a)		1,904		36,233
Talis Biomedical Corp. (a)		1,441		5,778
Treace Medical Concepts, Inc. (a)		2,925		54,522
Utah Medical Products, Inc.		340		34,000
Varex Imaging Corp. (a)		3,752		118,376
ViewRay, Inc. (a)		13,614		75,013
Zynex, Inc. (a) (b)		1,892		18,863
				11,117,148
Health Care – Services — 2.0%
Accolade, Inc. (a) (b)		4,920		129,691
Addus HomeCare Corp. (a)		1,504		140,639
Agiliti, Inc. (a)		2,305		53,384
American Well Corp. Class A (a)		17,898		108,104
Aveanna Healthcare Holdings, Inc. (a)		3,849		28,483
Brookdale Senior Living, Inc. (a)		18,077		93,277
Community Health Systems, Inc. (a)		12,133		161,490
The Ensign Group, Inc.		5,124		430,211
Fulgent Genetics, Inc. (a) (b)		2,039		205,103
Innovage Holding Corp. (a) (b)		1,774		8,870
Inotiv, Inc. (a) (b)		1,439		60,539
Invitae Corp. (a) (b)		19,534		298,284
The Joint Corp. (a)		1,349		88,616
LHC Group, Inc. (a)		2,978		408,671
LifeStance Health Group, Inc. (a)		4,552		43,335
Magellan Health, Inc. (a)		2,304		218,857
MEDNAX, Inc. (a)		7,438		202,388
Medpace Holdings, Inc. (a)		2,831		616,139
ModivCare, Inc. (a)		1,214		180,024
National HealthCare Corp.		1,240		84,246
Neuronetics, Inc. (a) (b)		2,556		11,400
Ontrak, Inc. (a)		856		5,384
OPKO Health, Inc. (a) (b)		39,035		187,758
The Pennant Group, Inc. (a)		2,515		58,046
Personalis, Inc. (a) (b)		3,533		50,416
RadNet, Inc. (a)		4,441		133,718
Select Medical Holdings Corp.		10,759		316,315
SOC Telemed, Inc. (a) (b)		5,928		7,588
Surgery Partners, Inc. (a) (b)		3,317		177,161
Tenet Healthcare Corp. (a)		10,368		846,962
Thorne HealthTech, Inc. (a)		652		4,049
Tivity Health, Inc. (a)		4,304		113,798
Triple-S Management Corp. Class B (a)		2,242		79,994

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
U.S. Physical Therapy, Inc.		1,251	$	119,533
Vapotherm, Inc. (a)		2,232		46,225
Viemed Healthcare, Inc. (a)		3,491		18,223
				5,736,921
Household Products & Wares — 0.4%
ACCO Brands Corp.		9,171		75,753
Central Garden & Pet Co. (a)		967		50,893
Central Garden & Pet Co. Class A (a)		4,000		191,400
Helen of Troy Ltd. (a)		2,356		575,971
Quanex Building Products Corp.		3,304		81,873
WD-40 Co.		1,330		325,371
				1,301,261
Pharmaceuticals — 3.0%
Aclaris Therapeutics, Inc. (a)		5,013		72,889
AdaptHealth Corp. (a)		7,007		171,391
Aeglea BioTherapeutics, Inc. (a)		3,909		18,568
Aerie Pharmaceuticals, Inc. (a) (b)		4,205		29,519
Agios Pharmaceuticals, Inc. (a)		5,296		174,080
Akebia Therapeutics, Inc. (a) (b)		17,101		38,648
Alector, Inc. (a)		5,703		117,767
Alkermes PLC (a)		15,635		363,670
Amneal Pharmaceuticals, Inc. (a)		9,909		47,464
Amphastar Pharmaceuticals, Inc. (a)		3,644		84,869
Ampio Pharmaceuticals, Inc. (a)		19,481		11,104
Anika Therapeutics, Inc. (a)		1,417		50,771
Antares Pharma, Inc. (a)		16,385		58,494
Arvinas, Inc. (a)		4,597		377,598
Athenex, Inc. (a)		8,472		11,522
Beyondspring, Inc. (a) (b)		2,259		10,233
BioDelivery Sciences International, Inc. (a)		9,212		28,557
Bioxcel Therapeutics, Inc. (a) (b)		1,713		34,825
Catalyst Pharmaceuticals, Inc. (a)		9,539		64,579
Chimerix, Inc. (a)		7,158		46,026
Citius Pharmaceuticals, Inc. (a) (b)		11,197		17,243
Clovis Oncology, Inc. (a)		11,189		30,322
Coherus Biosciences, Inc. (a)		6,343		101,234
Collegium Pharmaceutical, Inc. (a)		3,373		63,008
Corcept Therapeutics, Inc. (a) (b)		9,313		184,397
CorMedix, Inc. (a)		3,683		16,758
Covetrus, Inc. (a)		10,124		202,176
Cytokinetics, Inc. (a)		7,731		352,379
Durect Corp. (a) (b)		22,361		22,046
Eagle Pharmaceuticals, Inc. (a)		1,120		57,030
Enanta Pharmaceuticals, Inc. (a)		1,881		140,661
Endo International PLC (a)		22,391		84,190
Foghorn Therapeutics, Inc. (a) (b)		1,932		44,185
Fortress Biotech, Inc. (a)		6,963		17,408
Fulcrum Therapeutics, Inc. (a) (b)		2,612		46,206
G1 Therapeutics, Inc. (a) (b)		3,842		39,227
Gritstone bio, Inc. (a)		4,143		53,279
Harmony Biosciences Holdings, Inc. (a)		2,231		95,130
Harpoon Therapeutics, Inc. (a)		1,800		13,590
Heron Therapeutics, Inc. (a) (b)		9,145		83,494
Heska Corp. (a)		956		174,460
Hookipa Pharma, Inc. (a)		1,825		4,252

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Ideaya Biosciences, Inc. (a)		3,221	$	76,144
Immuneering Corp. Class A (a)		814		13,162
Intellia Therapeutics, Inc. (a)		6,798		803,796
Ironwood Pharmaceuticals, Inc. (a)		14,349		167,309
Jounce Therapeutics, Inc. (a)		3,260		27,221
Kala Pharmaceuticals, Inc. (a) (b)		4,802		5,810
KalVista Pharmaceuticals, Inc. (a)		2,189		28,960
Kura Oncology, Inc. (a)		6,258		87,612
Landos Biopharma, Inc. (a)		475		2,280
Lyell Immunopharma, Inc. (a)		2,304		17,833
Madrigal Pharmaceuticals, Inc. (a)		1,140		96,604
MannKind Corp. (a) (b)		24,104		105,334
Marinus Pharmaceuticals, Inc. (a) (b)		3,669		43,588
Mirum Pharmaceuticals, Inc. (a)		340		5,423
Morphic Holding, Inc. (a)		2,047		96,987
Nature's Sunshine Products, Inc.		1,155		21,368
Neoleukin Therapeutics, Inc. (a)		3,491		16,827
NexImmune, Inc. (a)		1,719		7,925
Ocugen, Inc. (a) (b)		18,032		82,046
Ocular Therapeutix, Inc. (a)		7,522		52,428
Option Care Health, Inc. (a)		15,517		441,303
Oramed Pharmaceuticals, Inc. (a)		2,973		42,454
ORIC Pharmaceuticals, Inc. (a)		3,098		45,541
Outlook Therapeutics, Inc. (a)		8,800		11,968
Owens & Minor, Inc.		7,074		307,719
Pacira BioSciences, Inc. (a)		4,313		259,513
Paratek Pharmaceuticals, Inc. (a) (b)		4,702		21,112
Passage Bio, Inc. (a)		3,673		23,324
Patterson Cos., Inc.		8,331		244,515
PetIQ, Inc. (a) (b)		2,643		60,023
Phibro Animal Health Corp. Class A		2,031		41,473
PMV Pharmaceuticals, Inc. (a)		2,576		59,506
Prestige Consumer Healthcare, Inc. (a)		4,863		294,941
Prometheus Biosciences, Inc. (a)		2,921		115,496
Protagonist Therapeutics, Inc. (a)		4,367		149,351
Reata Pharmaceuticals, Inc. Class A (a) (b)		2,703		71,278
Relmada Therapeutics, Inc. (a)		1,552		34,967
Reneo Pharmaceuticals, Inc. (a)		807		6,900
Revance Therapeutics, Inc. (a)		6,855		111,874
Rhythm Pharmaceuticals, Inc. (a)		4,319		43,104
Senseonics Holdings, Inc. (a) (b)		42,202		112,679
Seres Therapeutics, Inc. (a)		6,834		56,927
SIGA Technologies, Inc. (a)		4,854		36,502
Spectrum Pharmaceuticals, Inc. (a)		16,128		20,483
Spero Therapeutics, Inc. (a)		2,401		38,440
Summit Therapeutics, Inc. (a)		2,599		6,991
Supernus Pharmaceuticals, Inc. (a)		4,800		139,968
Syros Pharmaceuticals, Inc. (a) (b)		5,687		18,540
TherapeuticsMD, Inc. (a)		38,396		13,650
Tonix Pharmaceuticals Holding Corp. (a)		43,415		15,530
Trevena, Inc. (a)		15,770		9,186
USANA Health Sciences, Inc. (a)		1,167		118,100
Vanda Pharmaceuticals, Inc. (a)		5,403		84,773
Vaxcyte, Inc. (a)		3,983		94,756
Verrica Pharmaceuticals, Inc. (a) (b)		1,294		11,853

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Zogenix, Inc. (a) (b)		5,515	$	89,619
				8,668,265
				70,252,400
Energy — 4.4%
Coal — 0.1%
Arch Resources, Inc.		1,477		134,880
CONSOL Energy, Inc. (a)		3,371		76,556
Peabody Energy Corp. (a)		8,677		87,377
SunCoke Energy, Inc.		8,160		53,774
Warrior Met Coal, Inc.		5,029		129,296
				481,883
Energy – Alternate Sources — 0.6%
Advent Technologies Holdings, Inc. (a)		1,535		10,760
Aemetis, Inc. (a)		2,649		32,583
Alto Ingredients, Inc. (a)		7,097		34,136
Array Technologies, Inc. (a)		12,478		195,780
Beam Global (a)		855		15,903
Cleanspark, Inc. (a) (b)		3,272		31,149
Eos Energy Enterprises, Inc. (a)		4,267		32,088
FuelCell Energy, Inc. (a) (b)		36,074		187,585
FutureFuel Corp.		2,565		19,597
Gevo, Inc. (a)		19,291		82,565
Green Plains, Inc. (a)		4,663		162,086
Renewable Energy Group, Inc. (a)		4,373		185,590
REX American Resources Corp. (a)		521		50,016
Stem, Inc. (a)		11,125		211,041
Sunnova Energy International, Inc. (a)		8,392		234,305
SunPower Corp. (a)		7,821		163,224
TPI Composites, Inc. (a)		3,559		53,243
				1,701,651
Oil & Gas — 2.9%
Antero Resources Corp. (a)		27,930		488,775
Berry Corp.		6,622		55,757
Brigham Minerals, Inc. Class A		4,309		90,877
California Resources Corp.		7,918		338,178
Callon Petroleum Co. (a) (b)		4,638		219,145
Centennial Resource Development, Inc. Class A (a)		17,901		107,048
Chesapeake Energy Corp.		10,253		661,524
Civitas Resources, Inc.		4,244		207,829
CNX Resources Corp. (a)		20,457		281,284
Comstock Resources, Inc. (a)		9,010		72,891
Crescent Energy, Inc. Class A (a) (b)		2,880		36,518
CVR Energy, Inc.		2,903		48,799
Delek US Holdings, Inc. (a)		6,417		96,191
Denbury, Inc. (a)		4,920		376,823
Earthstone Energy, Inc. Class A (a)		2,371		25,939
Falcon Minerals Corp.		3,901		18,998
Helmerich & Payne, Inc.		10,238		242,641
HighPeak Energy, Inc.		489		7,159
Kosmos Energy Ltd. (a)		43,736		151,327
Laredo Petroleum, Inc. (a)		1,240		74,561
Magnolia Oil & Gas Corp. Class A		14,092		265,916
Matador Resources Co.		10,796		398,588

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Murphy Oil Corp.		14,277	$	372,772
Nabors Industries Ltd. (a)		694		56,276
Northern Oil and Gas, Inc.		5,115		105,267
Oasis Petroleum, Inc.		1,933		243,539
Ovintiv, Inc.		25,593		862,484
Par Pacific Holdings, Inc. (a)		4,395		72,473
Patterson-UTI Energy, Inc.		18,227		154,018
PBF Energy, Inc. Class A (a)		9,407		122,009
PDC Energy, Inc.		9,521		464,434
Range Resources Corp. (a)		23,324		415,867
Ranger Oil Corp. Class A (a)		2,064		55,563
Riley Exploration Permian, Inc.		255		4,927
SM Energy Co.		11,702		344,975
Southwestern Energy Co. (a) (b)		99,202		462,281
Talos Energy, Inc. (a)		3,662		35,888
Tellurian, Inc. (a)		36,073		111,105
W&T Offshore, Inc. (a) (b)		9,311		30,074
Whiting Petroleum Corp. (a)		3,837		248,177
				8,428,897
Oil & Gas Services — 0.6%
Archrock, Inc.		13,325		99,671
Bristow Group, Inc. (a)		2,328		73,728
ChampionX Corp. (a)		19,787		399,895
DMC Global, Inc. (a)		1,830		72,486
Dril-Quip, Inc. (a)		3,458		68,053
Expro Group Holdings NV (a)		4,522		64,891
FTS International, Inc. Class A (a)		866		22,732
Helix Energy Solutions Group, Inc. (a) (b)		14,076		43,917
Liberty Oilfield Services, Inc. Class A (a)		8,968		86,990
Matrix Service Co. (a)		2,573		19,349
MRC Global, Inc. (a)		7,905		54,386
National Energy Services Reunited Corp. (a) (b)		3,773		35,655
Newpark Resources, Inc. (a)		8,937		26,275
NexTier Oilfield Solutions, Inc. (a)		17,002		60,357
NOW, Inc. (a)		10,773		92,001
Oceaneering International, Inc. (a)		9,738		110,137
Oil States International, Inc. (a)		6,010		29,870
ProPetro Holding Corp. (a)		8,396		68,008
RPC, Inc. (a) (b)		6,697		30,404
Select Energy Services, Inc. Class A (a)		6,043		37,648
Solaris Oilfield Infrastructure, Inc. Class A		3,044		19,938
TETRA Technologies, Inc. (a)		12,170		34,563
Tidewater, Inc. (a)		4,024		43,097
US Silica Holdings, Inc. (a)		7,219		67,859
				1,661,910
Pipelines — 0.2%
Equitrans Midstream Corp.		39,876		412,318
Golar LNG Ltd. (a)		9,808		121,521
				533,839
				12,808,180
Financial — 23.0%
Banks — 8.5%
1st Source Corp.		1,666		82,634

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Alerus Financial Corp.		1,478	$	43,276
Allegiance Bancshares, Inc.		1,874		79,102
Amalgamated Financial Corp.		1,355		22,723
American National Bankshares, Inc.		1,039		39,150
Ameris Bancorp		6,464		321,131
Arrow Financial Corp.		1,358		47,842
Associated Banc-Corp.		14,544		328,549
Atlantic Capital Bancshares, Inc. (a)		1,932		55,584
Atlantic Union Bankshares Corp.		7,347		273,970
BancFirst Corp.		1,699		119,881
The Bancorp, Inc. (a)		5,113		129,410
Bank First Corp.		655		47,317
Bank of Marin Bancorp		1,521		56,627
The Bank of NT Butterfield & Son Ltd.		4,917		187,387
BankUnited, Inc.		8,702		368,182
Banner Corp.		3,294		199,847
Bar Harbor Bankshares		1,448		41,891
Blue Foundry Bancorp (a)		2,785		40,745
Blue Ridge Bankshares, Inc.		1,696		30,358
Bridgewater Bancshares, Inc. (a)		2,091		36,990
Bryn Mawr Bank Corp.		1,951		87,814
Business First Bancshares, Inc.		1,878		53,166
Byline Bancorp, Inc.		2,453		67,090
Cadence Bank		18,381		547,570
Cambridge Bancorp		670		62,705
Camden National Corp.		1,448		69,736
Capital Bancorp, Inc. /MD		765		20,043
Capital City Bank Group, Inc.		1,337		35,297
Capstar Financial Holdings, Inc.		2,007		42,207
Carter Bankshares, Inc. (a)		2,573		39,598
Cathay General Bancorp		7,247		311,549
CBTX, Inc.		1,806		52,374
Central Pacific Financial Corp.		2,719		76,594
CIT Group, Inc.		9,693		497,639
Citizens & Northern Corp.		1,542		40,277
City Holding Co.		1,414		115,651
Civista Bancshares, Inc.		1,454		35,478
CNB Financial Corp.		1,576		41,764
Coastal Financial Corp. (a)		940		47,583
Columbia Banking System, Inc.		7,587		248,247
Community Bank System, Inc.		5,211		388,115
Community Trust Bancorp, Inc.		1,529		66,680
ConnectOne Bancorp, Inc.		3,691		120,733
CrossFirst Bankshares, Inc. (a)		4,583		71,541
Customers Bancorp, Inc. (a)		2,924		191,142
CVB Financial Corp.		12,536		268,396
Dime Community Bancshares, Inc.		3,424		120,388
Eagle Bancorp, Inc.		3,127		182,429
Eastern Bankshares, Inc.		16,716		337,162
Enterprise Bancorp, Inc.		920		41,326
Enterprise Financial Services Corp.		3,501		164,862
Equity Bancshares, Inc. Class A		1,325		44,957
Farmers National Banc Corp.		3,035		56,299
FB Financial Corp.		3,295		144,387
Fidelity D&D Bancorp, Inc.		391		23,069
Financial Institutions, Inc.		1,537		48,877
First BanCorp		19,712		271,631
First Bancorp		3,362		153,711

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
First Bancorp, Inc.		1,027	$	32,248
The First Bancshares, Inc.		2,000		77,240
First Bank		1,519		22,041
First Busey Corp.		4,798		130,122
First Commonwealth Financial Corp.		9,009		144,955
First Community Bancshares, Inc.		1,661		55,511
First Financial Bancorp		8,871		216,275
First Financial Bankshares, Inc.		12,694		645,363
First Financial Corp.		1,141		51,676
First Foundation, Inc.		3,926		97,600
First Internet Bancorp		924		43,465
First Interstate BancSystem, Inc. Class A		4,046		164,551
First Merchants Corp.		5,512		230,898
First Mid Bancshares, Inc.		1,635		69,962
First Midwest Bancorp, Inc.		10,998		225,239
The First of Long Island Corp.		2,254		48,664
Five Star Bancorp		1,202		36,060
Flagstar Bancorp, Inc.		5,053		242,241
Fulton Financial Corp.		15,397		261,749
German American Bancorp Inc.		2,446		95,345
Glacier Bancorp, Inc.		10,770		610,659
Great Southern Bancorp, Inc.		1,040		61,620
Great Western Bancorp, Inc.		5,425		184,233
Guaranty Bancshares, Inc.		791		29,726
Hancock Whitney Corp.		8,443		422,319
Hanmi Financial Corp.		2,998		70,993
HarborOne Bancorp, Inc.		4,537		67,329
HBT Financial, Inc.		944		17,681
Heartland Financial USA, Inc.		3,984		201,630
Heritage Commerce Corp.		5,743		68,571
Heritage Financial Corp.		3,285		80,285
Hilltop Holdings, Inc.		6,037		212,140
Home BancShares, Inc.		14,850		361,597
HomeStreet, Inc.		1,902		98,904
Hope Bancorp, Inc.		11,072		162,869
Horizon Bancorp, Inc.		4,225		88,091
Howard Bancorp, Inc. (a)		1,287		28,044
Independent Bank Corp.		4,458		363,461
Independent Bank Corp. of Michigan		2,037		48,623
Independent Bank Group, Inc.		3,649		263,275
International Bancshares Corp.		5,195		220,216
Kearny Financial Corp.		6,453		85,502
Lakeland Bancorp, Inc.		4,821		91,551
Lakeland Financial Corp.		2,388		191,374
Live Oak Bancshares, Inc.		3,112		271,646
Luther Burbank Corp.		1,542		21,650
Macatawa Bank Corp.		2,560		22,579
Mercantile Bank Corp.		1,527		53,491
Merchants Bancorp		965		45,673
Meta Financial Group, Inc.		3,076		183,514
Metrocity Bankshares, Inc. (b)		1,864		51,316
Metropolitan Bank Holding Corp. (a)		951		101,310
Mid Penn Bancorp, Inc.		1,391		44,150
Midland States Bancorp, Inc.		2,081		51,588
MidWestOne Financial Group, Inc.		1,420		45,965
MVB Financial Corp.		980		40,690
National Bank Holdings Corp. Class A		2,791		122,637
NBT Bancorp, Inc.		4,172		160,705

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Nicolet Bankshares, Inc. (a)		1,238	$	106,158
Northrim BanCorp, Inc.		600		26,076
OFG Bancorp		4,748		126,107
Old National Bancorp		16,026		290,391
Old Second Bancorp, Inc.		2,716		34,194
Origin Bancorp, Inc.		2,184		93,737
Orrstown Financial Services, Inc.		1,079		27,191
Park National Corp. (b)		1,412		193,882
PCSB Financial Corp.		1,268		24,143
Peapack Gladstone Financial Corp.		1,782		63,083
Peoples Bancorp, Inc.		2,497		79,430
Peoples Financial Services Corp.		696		36,672
Pioneer Bancorp, Inc. (a)		1,138		12,882
Preferred Bank		1,361		97,706
Premier Financial Corp.		3,628		112,141
Primis Financial Corp.		2,395		36,021
Provident Bancorp, Inc.		1,521		28,291
QCR Holdings, Inc.		1,490		83,440
RBB Bancorp		1,397		36,601
Red River Bancshares, Inc.		448		23,968
Reliant Bancorp, Inc.		1,495		53,072
Renasant Corp.		5,282		200,452
Republic Bancorp, Inc. Class A		924		46,976
Republic First Bancorp, Inc. (a)		4,383		16,305
S&T Bancorp, Inc.		3,835		120,879
Sandy Spring Bancorp, Inc.		4,315		207,465
Seacoast Banking Corp. of Florida		5,035		178,189
ServisFirst Bancshares, Inc.		4,866		413,318
Sierra Bancorp		1,396		37,901
Silvergate Capital Corp. Class A (a)		2,685		397,917
Simmons First National Corp. Class A		11,117		328,841
SmartFinancial, Inc.		1,375		37,620
South Plains Financial, Inc.		1,038		28,867
Southern First Bancshares, Inc. (a)		730		45,618
Southside Bancshares, Inc.		3,083		128,931
SouthState Corp.		6,823		546,591
Spirit of Texas Bancshares, Inc.		1,254		36,090
Stock Yards Bancorp, Inc.		2,362		150,885
Summit Financial Group, Inc.		1,112		30,524
Texas Capital Bancshares, Inc. (a)		4,935		297,334
Third Coast Bancshares, Inc. (a)		329		8,547
Tompkins Financial Corp.		1,398		116,845
Towne Bank		6,450		203,755
TriCo Bancshares		2,727		117,152
TriState Capital Holdings, Inc. (a)		2,860		86,544
Triumph Bancorp, Inc. (a)		2,291		272,812
TrustCo Bank Corp. NY		1,856		61,823
Trustmark Corp.		6,140		199,304
UMB Financial Corp.		4,272		453,302
United Bankshares, Inc.		12,876		467,141
United Community Banks, Inc.		8,742		314,187
Univest Financial Corp.		2,854		85,392
Valley National Bancorp		39,154		538,367
Veritex Holdings, Inc.		4,667		185,653
Walker & Dunlop, Inc.		2,851		430,159
Washington Trust Bancorp, Inc.		1,693		95,434
WesBanco, Inc.		5,941		207,876
West BanCorp, Inc.		1,582		49,153

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Westamerica Bancorp.		2,576	$	148,712
				24,757,542
Diversified Financial Services — 2.6%
Amerant Bancorp, Inc.		2,660		91,903
Artisan Partners Asset Management, Inc. Class A		5,692		271,167
Assetmark Financial Holdings, Inc. (a)		1,785		46,785
Associated Capital Group, Inc. Class A		154		6,622
Atlanticus Holdings Corp. (a)		475		33,877
B. Riley Financial, Inc.		1,977		175,676
BGC Partners, Inc. Class A		30,842		143,415
Blucora, Inc. (a)		4,791		82,980
Brightsphere Investment Group, Inc.		5,663		144,973
Cohen & Steers, Inc.		2,418		223,689
Columbia Financial, Inc. (a)		3,871		80,749
Cowen, Inc. Class A		2,565		92,596
Curo Group Holdings Corp. (b)		2,004		32,084
Diamond Hill Investment Group, Inc.		298		57,880
Enact Holdings, Inc.		1,442		29,806
Encore Capital Group, Inc. (a) (b)		2,843		176,579
Enova International, Inc. (a)		3,552		145,490
EZCORP, Inc. Class A (a)		4,893		36,061
Federal Agricultural Mortgage Corp. Class C (b)		905		112,157
Federated Hermes, Inc.		9,101		342,016
Finance Of America Cos., Inc. Class A (a)		1,772		7,035
Flywire Corp. (a)		6,151		234,107
Focus Financial Partners, Inc. Class A (a)		5,807		346,794
GAMCO Investors, Inc. Class A		519		12,965
GCM Grosvenor, Inc. Class A		4,219		44,299
Greenhill & Co., Inc.		1,366		24,492
Hamilton Lane, Inc. Class A		3,409		353,241
Hannon Armstrong Sustainable Infrastructure Capital, Inc.		7,476		397,125
Home Point Capital, Inc. (b)		663		2,983
Houlihan Lokey, Inc.		4,990		516,565
I3 Verticals, Inc. Class A (a)		2,097		47,791
International Money Express, Inc. (a)		3,142		50,146
LendingClub Corp. (a)		9,658		233,530
LendingTree, Inc. (a)		1,136		139,274
Marlin Business Services Corp.		789		18,368
Moelis & Co. Class A		5,959		372,497
Mr Cooper Group, Inc. (a)		6,044		251,491
Navient Corp.		15,453		327,913
Nelnet, Inc. Class A		1,673		163,419
Ocwen Financial Corp. (a)		810		32,376
Oportun Financial Corp. (a)		2,044		41,391
Oppenheimer Holdings, Inc. Class A		918		42,568
PennyMac Financial Services, Inc.		3,054		213,108
Piper Sandler Cos.		1,701		303,645
PJT Partners, Inc. Class A		2,305		170,777
PRA Group, Inc. (a)		4,215		211,635
Pzena Investment Management, Inc. Class A		1,661		15,730
Regional Management Corp.		754		43,325
Sculptor Capital Management, Inc.		2,145		45,796
StepStone Group, Inc. Class A		3,963		164,742
Stonex Group, Inc. (a)		1,657		101,491
Stronghold Digital Mining, Inc. Class A (a)		714		9,175
Velocity Financial, Inc. (a)		825		11,302
Virtus Investment Partners, Inc.		707		210,050

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
WisdomTree Investments, Inc.		13,273	$	81,231
World Acceptance Corp. (a) (b)		427		104,799
				7,673,681
Insurance — 2.3%
Ambac Financial Group, Inc. (a)		4,472		71,776
American Equity Investment Life Holding Co.		8,061		313,734
American National Group, Inc.		735		138,797
AMERISAFE, Inc.		1,897		102,115
Argo Group International Holdings Ltd.		3,107		180,548
BRP Group, Inc. Class A (a)		4,621		166,864
Citizens, Inc. (a)		4,945		26,258
CNO Financial Group, Inc.		11,994		285,937
Crawford & Co. Class A		1,600		11,984
Donegal Group, Inc. Class A		1,439		20,563
eHealth, Inc. (a)		2,398		61,149
Employers Holdings, Inc.		2,691		111,354
Enstar Group Ltd. (a)		1,208		299,089
Essent Group Ltd.		10,584		481,890
Genworth Financial, Inc. Class A (a)		49,530		200,596
Goosehead Insurance, Inc. Class A		1,763		229,331
Greenlight Capital Re Ltd. Class A (a)		2,578		20,212
HCI Group, Inc.		556		46,448
Heritage Insurance Holdings, Inc.		2,588		15,217
Horace Mann Educators Corp.		4,098		158,593
Independence Holding Co.		423		23,976
Investors Title Co.		129		25,432
James River Group Holdings Ltd.		3,621		104,321
Kinsale Capital Group, Inc.		2,100		499,569
Maiden Holdings Ltd. (a)		6,768		20,710
MBIA, Inc. (a)		4,707		74,324
MetroMile, Inc. (a)		9,345		20,466
National Western Life Group, Inc. Class A		252		54,039
NI Holdings, Inc. (a)		841		15,903
NMI Holdings, Inc. Class A (a)		8,219		179,585
Palomar Holdings, Inc. (a)		2,400		155,448
ProAssurance Corp.		5,251		132,850
Radian Group, Inc.		17,606		372,015
RLI Corp.		3,903		437,526
Safety Insurance Group, Inc.		1,429		121,508
Selective Insurance Group, Inc.		5,802		475,416
Selectquote, Inc. (a)		13,092		118,614
SiriusPoint Ltd. (a)		8,707		70,788
State Auto Financial Corp.		1,743		90,096
Stewart Information Services Corp.		2,613		208,334
Tiptree, Inc.		2,295		31,740
Trean Insurance Group, Inc. (a)		1,765		15,726
Trupanion, Inc. (a)		3,727		492,076
United Fire Group, Inc.		2,063		47,841
United Insurance Holdings Corp.		1,969		8,545
Universal Insurance Holdings, Inc.		2,658		45,186
				6,784,489
Investment Companies — 0.0%
Altus Midstream Co. Class A		322		19,742
Real Estate — 0.9%
Alexander & Baldwin, Inc.		7,108		178,340

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Angel Oak Mortgage, Inc.		709	$	11,613
Cushman & Wakefield PLC (a)		13,523		300,752
Douglas Elliman, Inc. (a)		6,981		80,281
eXp World Holdings, Inc.		6,135		206,688
Fathom Holdings, Inc. (a) (b)		587		12,010
FRP Holdings, Inc. (a)		664		38,379
Kennedy-Wilson Holdings, Inc.		11,615		277,366
Legacy Housing Corp. (a)		783		20,726
Marcus & Millichap, Inc. (a)		2,344		120,622
McGrath RentCorp		2,367		189,975
Newmark Group, Inc. Class A		14,538		271,861
Radius Global Infrastructure, Inc. Class A (a)		5,826		93,799
Rafael Holdings, Inc. Class B Class B (a)		926		4,723
RE/MAX Holdings, Inc. Class A		1,817		55,400
Realogy Holdings Corp. (a)		11,262		189,314
Redfin Corp. (a) (b)		10,068		386,511
The RMR Group, Inc. Class A		1,498		51,951
The St. Joe Co.		3,269		170,151
				2,660,462
Real Estate Investment Trusts (REITS) — 7.7%
Acadia Realty Trust		8,517		185,926
AFC Gamma, Inc.		1,187		27,016
Agree Realty Corp.		6,710		478,826
Alexander's, Inc.		210		54,663
American Assets Trust, Inc.		4,937		185,286
American Finance Trust, Inc.		12,204		111,423
Apartment Investment and Management Co. Class A (a)		14,725		113,677
Apollo Commercial Real Estate Finance, Inc.		13,872		182,556
Apple Hospitality REIT, Inc.		20,853		336,776
Arbor Realty Trust, Inc.		14,040		257,213
Ares Commercial Real Estate Corp.		4,306		62,609
Armada Hoffler Properties, Inc.		5,969		90,848
ARMOUR Residential REIT, Inc. (b)		8,643		84,788
Ashford Hospitality Trust, Inc. (a) (b)		1,674		16,070
Blackstone Mortgage Trust, Inc. Class A		15,355		470,170
Braemar Hotels & Resorts, Inc. (a)		5,144		26,234
Brandywine Realty Trust		16,386		219,900
BrightSpire Capital, Inc.		8,313		85,291
Broadmark Realty Capital, Inc.		12,708		119,836
Broadstone Net Lease, Inc.		15,327		380,416
BRT Apartments Corp.		1,122		26,917
CareTrust REIT, Inc.		9,334		213,095
Catchmark Timber Trust, Inc. Class A		4,857		42,304
Centerspace		1,389		154,040
Chatham Lodging Trust (a)		4,735		64,964
Chimera Investment Corp.		22,908		345,453
City Office REIT, Inc.		4,204		82,903
Clipper Realty, Inc.		1,173		11,660
Community Healthcare Trust, Inc.		2,337		110,470
CorePoint Lodging Inc. (a)		3,865		60,680
Corporate Office Properties Trust		10,959		306,523
CTO Realty Growth, Inc. (b)		579		35,562
DiamondRock Hospitality Co. (a)		20,537		197,361
Digitalbridge Group, Inc. (a)		47,325		394,217
Diversified Healthcare Trust		23,320		72,059
Dynex Capital, Inc. (b)		3,597		60,106
Easterly Government Properties, Inc.		8,541		195,760

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
EastGroup Properties, Inc.		3,957	$	901,602
Ellington Financial, Inc.		5,174		88,424
Empire State Realty Trust, Inc. Class A		14,017		124,751
Equity Commonwealth (a)		11,372		294,535
Essential Properties Realty Trust, Inc.		11,836		341,232
Farmland Partners, Inc.		2,800		33,460
Four Corners Property Trust, Inc.		7,520		221,163
Franklin BSP Realty Trust, Inc.		3,462		51,722
Franklin Street Properties Corp.		9,938		59,131
The GEO Group, Inc. (b)		11,631		90,140
Getty Realty Corp.		3,942		126,499
Gladstone Commercial Corp.		3,592		92,566
Gladstone Land Corp.		3,042		102,698
Global Medical REIT, Inc.		5,927		105,204
Global Net Lease, Inc.		10,292		157,262
Granite Point Mortgage Trust, Inc.		5,280		61,829
Great Ajax Corp.		2,119		27,886
Healthcare Realty Trust, Inc.		14,356		454,224
Hersha Hospitality Trust (a)		3,155		28,931
Independence Realty Trust, Inc.		10,180		262,949
Indus Realty Trust, Inc.		558		45,231
Industrial Logistics Properties Trust		6,373		159,644
Innovative Industrial Properties, Inc. (b)		2,315		608,637
Invesco Mortgage Capital, Inc.		30,515		84,832
iStar, Inc. (b)		6,543		169,006
Kite Realty Group Trust		21,188		461,475
KKR Real Estate Finance Trust, Inc.		3,417		71,176
Ladder Capital Corp.		11,241		134,780
LTC Properties, Inc. (b)		3,851		131,473
LXP Industrial Trust		27,391		427,847
The Macerich Co.		20,859		360,444
MFA Financial, Inc.		42,666		194,557
Monmouth Real Estate Investment Corp.		9,176		192,788
National Health Investors, Inc.		4,237		243,500
National Storage Affiliates Trust		7,937		549,240
NETSTREIT Corp.		3,912		89,585
New York Mortgage Trust, Inc.		37,546		139,671
NexPoint Residential Trust, Inc.		2,199		184,342
Office Properties, Inc. ome Trust		4,738		117,692
One Liberty Properties, Inc.		1,582		55,813
Orchid Island Capital, Inc. (b)		13,249		59,620
Outfront Media, Inc.		14,182		380,361
Paramount Group, Inc.		18,298		152,605
Pebblebrook Hotel Trust		12,636		282,667
PennyMac Mortgage Investment Trust (b)		9,619		166,697
Phillips Edison & Co., Inc.		1,841		60,827
Physicians Realty Trust		21,642		407,519
Piedmont Office Realty Trust, Inc. Class A		11,970		220,009
Plymouth Industrial REIT, Inc.		3,054		97,728
Postal Realty Trust, Inc. Class A		1,201		23,780
PotlatchDeltic Corp.		6,436		387,576
Preferred Apartment Communities, Inc. Class A		5,073		91,618
PS Business Parks, Inc.		1,952		359,500
Ready Capital Corp. REIT		5,727		89,513
Redwood Trust, Inc.		11,178		147,438
Retail Opportunity Investments Corp.		11,486		225,126
Retail Value, Inc.		1,698		10,901
RLJ Lodging Trust		15,995		222,810

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
RPT Realty		7,980	$	106,772
Ryman Hospitality Properties, Inc. (a)		5,248		482,606
Sabra Health Care REIT, Inc.		22,325		302,280
Safehold, Inc.		2,034		162,415
Saul Centers, Inc.		1,162		61,609
Seritage Growth Properties Class A (a) (b)		3,665		48,635
Service Properties Trust		16,074		141,290
SITE Centers Corp.		16,796		265,881
STAG Industrial, Inc.		17,262		827,886
Summit Hotel Properties, Inc. (a)		10,243		99,972
Sunstone Hotel Investors, Inc. (a)		21,090		247,386
Tanger Factory Outlet Centers, Inc.		10,006		192,916
Terreno Realty Corp.		7,229		616,561
TPG RE Finance Trust, Inc.		5,903		72,725
Two Harbors Investment Corp.		33,454		193,030
UMH Properties, Inc.		4,200		114,786
Uniti Group, Inc. (b)		19,192		268,880
Universal Health Realty Income Trust		1,263		75,111
Urban Edge Properties		11,164		212,116
Urstadt Biddle Properties, Inc. Class A		2,924		62,281
Veris Residential, Inc. (a)		8,628		158,583
Washington Real Estate Investment Trust		8,317		214,994
Whitestone REIT		4,250		43,053
Xenia Hotels & Resorts, Inc. (a)		11,166		202,216
				22,471,818
Savings & Loans — 1.0%
Axos Financial, Inc. (a)		5,542		309,853
Banc of California, Inc.		5,421		106,360
Berkshire Hills Bancorp, Inc.		4,786		136,066
Brookline Bancorp, Inc.		7,597		122,995
Capitol Federal Financial, Inc.		12,750		144,458
Flushing Financial Corp.		2,899		70,446
FS Bancorp, Inc.		708		23,810
Hingham Institution for Savings		142		59,623
Home Bancorp Inc.		734		30,468
HomeTrust Bancshares, Inc.		1,491		46,191
Investors Bancorp, Inc.		22,244		336,997
Northfield Bancorp, Inc.		4,327		69,924
Northwest Bancshares, Inc.		12,102		171,364
OceanFirst Financial Corp.		5,604		124,409
Pacific Premier Bancorp, Inc.		9,128		365,394
Provident Financial Services, Inc.		7,504		181,747
Southern Missouri Bancorp, Inc.		748		39,023
Washington Federal, Inc.		6,288		209,893
Waterstone Financial, Inc.		2,123		46,409
WSFS Financial Corp.		4,546		227,846
				2,823,276
				67,191,010
Government — 0.0%
Multi-National — 0.0%
Banco Latinoamericano de Comercio Exterior SA		3,042		50,497

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Industrial — 13.0%
Aerospace & Defense — 0.6%
AAR Corp. (a)		3,365	$	131,336
Aerojet Rocketdyne Holdings, Inc.		7,295		341,114
Aerovironment, Inc. (a)		2,197		136,280
AerSale Corp. (a)		876		15,540
Astronics Corp. (a)		2,416		28,992
Barnes Group, Inc.		4,576		213,196
Ducommun, Inc. (a)		1,068		49,951
Kaman Corp.		2,734		117,972
Kratos Defense & Security Solutions, Inc. (a)		11,933		231,500
Moog, Inc. Class A		2,797		226,473
National Presto Industries, Inc.		508		41,671
Park Aerospace Corp.		1,938		25,582
Triumph Group, Inc. (a)		6,300		116,739
				1,676,346
Building Materials — 1.4%
AAON, Inc.		4,083		324,313
American Woodmark Corp. (a)		1,594		103,929
Apogee Enterprises, Inc.		2,397		115,415
Boise Cascade Co.		3,828		272,554
Caesarstone Ltd.		2,251		25,526
Cornerstone Building Brands, Inc. (a)		5,396		94,106
Forterra, Inc. (a)		2,861		68,035
Gibraltar Industries, Inc. (a)		3,189		212,642
Griffon Corp.		4,557		129,783
JELD-WEN Holding, Inc. (a)		8,924		235,237
Masonite International Corp. (a)		2,325		274,234
Patrick Industries, Inc.		2,223		179,374
PGT Innovations, Inc. (a)		5,702		128,238
Simpson Manufacturing Co., Inc.		4,260		592,438
SPX Corp. (a)		4,254		253,879
Summit Materials, Inc. Class A (a)		11,594		465,383
UFP Industries, Inc.		5,883		541,295
View, Inc. (a) (b)		13,598		53,168
				4,069,549
Electrical Components & Equipment — 0.7%
American Superconductor Corp. (a) (b)		2,739		29,800
Belden, Inc.		4,304		282,902
Blink Charging Co. (a) (b)		3,569		94,614
Encore Wire Corp.		1,926		275,611
Energizer Holdings, Inc.		6,599		264,620
EnerSys		4,170		329,680
Insteel Industries, Inc.		1,832		72,932
nLight, Inc. (a)		4,208		100,782
Novanta, Inc. (a)		3,449		608,162
Powell Industries, Inc.		901		26,570
				2,085,673
Electronics — 1.7%
Advanced Energy Industries, Inc.		3,685		335,556
Akoustis Technologies, Inc. (a) (b)		4,793		32,017
Allied Motion Technologies, Inc.		1,140		41,599
Atkore, Inc. (a)		4,502		500,577

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Badger Meter, Inc.		2,837	$	302,311
Benchmark Electronics, Inc.		3,348		90,731
Brady Corp. Class A		4,569		246,269
Cadre Holdings, Inc. (a)		611		15,532
Comtech Telecommunications Corp. (b)		2,505		59,343
FARO Technologies, Inc. (a)		1,781		124,706
Fluidigm Corp. (a) (b)		7,555		29,616
GoPro, Inc. Class A (a)		12,464		128,504
Identiv, Inc. (a)		2,088		58,756
II-VI, Inc. (a)		10,325		705,507
Itron, Inc. (a)		4,409		302,105
Kimball Electronics, Inc. (a)		2,363		51,419
Knowles Corp. (a)		8,573		200,179
Kopin Corp. (a)		7,704		31,509
Luna Innovations, Inc. (a)		3,012		25,421
Mesa Laboratories, Inc.		486		159,452
MicroVision, Inc. (a)		16,060		80,461
Napco Security Technologies, Inc. (a)		1,425		71,221
NVE Corp.		473		32,306
OSI Systems, Inc. (a)		1,675		156,110
Plexus Corp. (a)		2,720		260,821
Sanmina Corp. (a)		6,206		257,301
Stoneridge, Inc. (a)		2,561		50,554
TTM Technologies, Inc. (a)		10,159		151,369
Turtle Beach Corp. (a)		1,508		33,568
Vicor Corp. (a)		2,055		260,944
Vishay Intertechnology, Inc.		12,949		283,195
Vishay Precision Group, Inc. (a)		1,218		45,212
				5,124,171
Engineering & Construction — 1.6%
908 Devices, Inc. (a)		1,816		46,980
Arcosa, Inc.		4,694		247,374
Aris Water Solution, Inc. Class A (a)		1,867		24,178
Atlas Technical Consultants, Inc. (a)		1,363		11,476
Comfort Systems USA, Inc.		3,472		343,520
Concrete Pumping Holdings, Inc. (a)		2,548		20,894
Construction Partners, Inc. Class A Class A (a)		2,875		84,554
Dycom Industries, Inc. (a)		2,874		269,466
EMCOR Group, Inc.		5,218		664,721
Exponent, Inc.		5,073		592,171
Fluor Corp. (a) (b)		13,854		343,164
Granite Construction, Inc.		4,493		173,879
Great Lakes Dredge & Dock Corp. (a)		6,399		100,592
IES Holdings, Inc. (a)		849		42,993
Infrastructure and Energy Alternatives, Inc. (a)		2,716		24,987
INNOVATE Corp. (a)		4,662		17,249
Iteris, Inc. (a)		4,239		16,956
Latham Group, Inc. (a)		3,117		78,018
Mistras Group, Inc. (a)		1,934		14,370
MYR Group, Inc. (a)		1,618		178,870
NV5 Global, Inc. (a)		1,290		178,175
Primoris Services Corp.		5,244		125,751
Sterling Construction Co., Inc. (a)		2,736		71,957
Tutor Perini Corp. (a)		4,050		50,098
WillScot Mobile Mini Holdings Corp. (a)		20,640		842,938
				4,565,331

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Environmental Controls — 0.9%
Casella Waste Systems, Inc. Class A (a)		4,795	$	409,589
CECO Environmental Corp. (a)		3,116		19,413
Centrus Energy Corp. Class A (a)		952		47,514
Energy Recovery, Inc. (a) (b)		4,072		87,507
Evoqua Water Technologies Corp. (a)		11,306		528,556
Harsco Corp. (a)		7,660		127,999
Heritage-Crystal Clean, Inc. (a)		1,533		49,087
Montrose Environmental Group, Inc. (a)		2,553		180,012
Pure Cycle Corp. (a)		1,907		27,842
PureCycle Technologies, Inc. (a)		5,205		49,812
Sharps Compliance Corp. (a)		1,740		12,406
Tetra Tech, Inc.		5,268		894,506
US Ecology, Inc. (a)		3,117		99,557
				2,533,800
Hand & Machine Tools — 0.3%
Franklin Electric Co., Inc.		4,520		427,411
Kennametal, Inc.		8,121		291,625
Luxfer Holdings PLC		2,703		52,195
				771,231
Machinery – Construction & Mining — 0.3%
Argan, Inc.		1,465		56,681
Astec Industries, Inc.		2,217		153,572
Babcock & Wilcox Enterprises, Inc. (a)		5,445		49,114
Bloom Energy Corp. Class A (a)		13,894		304,695
Hyster-Yale Materials Handling, Inc.		992		40,771
The Manitowoc Co., Inc. (a)		3,373		62,704
Terex Corp.		6,658		292,619
				960,156
Machinery – Diversified — 1.9%
AgEagle Aerial Systems, Inc. (a) (b)		6,762		10,616
Alamo Group, Inc.		983		144,678
Albany International Corp. Class A		2,983		263,846
Altra Industrial Motion Corp.		6,308		325,304
Applied Industrial Technologies, Inc.		3,755		385,639
Cactus, Inc. Class A		5,390		205,521
Chart Industries, Inc. (a)		3,566		568,741
CIRCOR International, Inc. (a)		1,807		49,114
Columbus McKinnon Corp.		2,754		127,400
CSW Industrials, Inc.		1,454		175,730
DXP Enterprises, Inc. (a)		1,700		43,639
Eastman Kodak Co. (a)		4,439		20,775
The Gorman-Rupp Co.		2,248		100,148
GrafTech International Ltd.		19,577		231,596
Hydrofarm Holdings Group, Inc. (a)		3,804		107,615
Ichor Holdings Ltd. (a)		2,742		126,214
Kadant, Inc.		1,118		257,677
Lindsay Corp.		1,070		162,640
Mueller Water Products, Inc. Class A		15,239		219,442
NN, Inc. (a)		4,153		17,027
Ranpak Holdings Corp. (a)		3,676		138,144
SPX FLOW, Inc.		4,052		350,417
Tennant Co.		1,825		147,898
Thermon Group Holdings, Inc. (a)		3,236		54,786

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Watts Water Technologies, Inc. Class A		2,687	$	521,735
Welbilt, Inc. (a)		12,747		302,996
Zurn Water Solutions Corp.		11,836		430,830
				5,490,168
Metal Fabricate & Hardware — 0.7%
AZZ, Inc.		2,460		136,013
Helios Technologies, Inc.		3,146		330,865
Lawson Products, Inc. (a)		464		25,404
Mayville Engineering Co., Inc. (a)		877		13,076
Mueller Industries, Inc.		5,469		324,640
Northwest Pipe Co. (a) (b)		959		30,496
Olympic Steel, Inc.		925		21,738
Omega Flex, Inc.		308		39,101
Park-Ohio Holdings Corp.		826		17,486
Proto Labs, Inc. (a)		2,716		139,467
RBC Bearings, Inc. (a)		2,732		551,782
Ryerson Holding Corp.		1,633		42,540
Standex International Corp.		1,148		127,038
TimkenSteel Corp. (a)		4,513		74,464
Tredegar Corp.		2,598		30,708
Worthington Industries, Inc.		3,215		175,732
Xometry, Inc. Class A (a)		801		41,051
				2,121,601
Miscellaneous - Manufacturing — 1.0%
American Outdoor Brands, Inc. (a)		1,397		27,842
AMMO, Inc. (a) (b)		8,446		46,031
Byrna Technologies, Inc. (a)		1,827		24,390
Chase Corp.		731		72,778
Enerpac Tool Group Corp.		5,926		120,179
EnPro Industries, Inc.		2,000		220,140
ESCO Technologies, Inc.		2,478		222,995
Fabrinet (a)		3,606		427,203
Federal Signal Corp.		5,831		252,716
Haynes International, Inc.		1,226		49,445
Hillenbrand, Inc.		7,098		369,025
John Bean Technologies Corp.		3,065		470,661
Materion Corp.		1,990		182,961
Meta Materials, Inc. (a) (b)		19,736		48,551
Myers Industries, Inc.		3,550		71,035
NL Industries, Inc.		785		5,809
Sight Sciences, Inc. (a)		1,101		19,345
Smith & Wesson Brands, Inc.		4,734		84,265
Sturm, Ruger & Co., Inc.		1,681		114,342
Trinity Industries, Inc.		7,536		227,587
				3,057,300
Packaging & Containers — 0.3%
Greif, Inc. Class A		2,532		152,857
Greif, Inc. Class B		580		34,672
Karat Packaging, Inc. (a)		459		9,276
Matthews International Corp. Class A		3,032		111,184
O-I Glass, Inc. (a)		15,446		185,815
Pactiv Evergreen, Inc.		4,221		53,522
TriMas Corp.		4,240		156,880

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
UFP Technologies, Inc. (a)		679	$	47,707
				751,913
Transportation — 1.4%
Air Transport Services Group, Inc. (a)		5,775		169,669
ArcBest Corp.		2,467		295,670
Atlas Air Worldwide Holdings, Inc. (a)		2,800		263,536
Costamare, Inc.		5,185		65,590
Covenant Logistics Group, Inc. (a)		1,200		31,716
CryoPort, Inc. (a)		3,953		233,899
Daseke, Inc. (a)		3,990		40,060
DHT Holdings, Inc.		13,951		72,406
Dorian LPG Ltd.		3,050		38,704
Eagle Bulk Shipping, Inc.		887		40,358
Forward Air Corp.		2,621		317,377
Frontline Ltd. (a) (b)		11,769		83,207
Genco Shipping & Trading Ltd.		3,152		50,432
Heartland Express, Inc.		4,699		79,037
Hub Group, Inc. Class A (a)		3,204		269,905
International Seaways, Inc.		4,520		66,354
Marten Transport Ltd.		5,881		100,918
Matson, Inc.		4,061		365,612
Nordic American Tankers Ltd.		16,435		27,775
PAM Transportation Services, Inc. (a)		355		25,209
Radiant Logistics, Inc. (a)		3,835		27,957
Safe Bulkers, Inc. (a)		6,154		23,201
Saia, Inc. (a)		2,591		873,245
Scorpio Tankers, Inc.		4,791		61,373
SFL Corp. Ltd.		11,997		97,775
Teekay Corp. (a)		6,863		21,550
Teekay Tankers Ltd. Class A (a)		2,373		25,866
Universal Logistics Holdings, Inc.		737		13,900
US Xpress Enterprises, Inc. Class A (a)		2,708		15,896
Werner Enterprises, Inc.		6,043		288,009
Yellow Corp. (a)		4,955		62,383
				4,148,589
Trucking & Leasing — 0.2%
GATX Corp.		3,437		358,101
The Greenbrier Cos., Inc. (b)		3,122		143,268
Willis Lease Finance Corp. (a)		266		10,015
				511,384
				37,867,212
Technology — 11.6%
Computers — 2.3%
3D Systems Corp. (a)		12,127		261,215
Cantaloupe, Inc. (a)		5,718		50,776
Conduent, Inc. (a)		16,565		88,457
Corsair Gaming, Inc. (a) (b)		2,687		56,454
Desktop Metal, Inc. Class A (a) (b)		18,303		90,600
Diebold Nixdorf, Inc. (a) (b)		7,069		63,974
Exlservice Holdings, Inc. (a)		3,204		463,843
Grid Dynamics Holdings, Inc. (a)		4,435		168,397
iCAD, Inc. (a)		2,189		15,761
Insight Enterprises, Inc. (a)		3,355		357,643

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Integral Ad Science Holding Corp. (a)		1,685	$	37,424
KBR, Inc.		13,822		658,204
MAXIMUS, Inc.		5,985		476,825
Mitek Systems, Inc. (a)		4,231		75,100
NetScout Systems, Inc. (a)		6,822		225,672
Onespan, Inc. (a)		3,459		58,561
PAE, Inc. (a)		6,824		67,762
PAR Technology Corp. (a) (b)		2,476		130,658
Parsons Corp. (a)		2,598		87,423
Ping Identity Holding Corp. (a)		5,894		134,855
PlayAGS, Inc. (a)		2,668		18,116
Qualys, Inc. (a)		3,328		456,668
Quantum Corp. (a)		5,692		31,420
Rapid7, Inc. (a)		5,485		645,530
Rekor Systems, Inc. (a) (b)		3,253		21,307
Rimini Street, Inc. (a) (b)		4,338		25,898
SecureWorks Corp. Class A (a)		967		15,443
Startek, Inc. (a)		1,664		8,686
Sterling Check Corp. (a)		1,604		32,898
Super Micro Computer, Inc. (a)		4,263		187,359
Telos Corp. (a)		3,922		60,477
Tenable Holdings, Inc. (a)		9,025		497,007
TTEC Holdings, Inc.		1,824		165,163
Unisys Corp. (a)		6,427		132,203
Varonis Systems, Inc. (a)		10,454		509,946
Vocera Communications, Inc. (a)		3,372		218,640
Vuzix Corp. (a)		5,761		49,948
				6,646,313
Office & Business Equipment — 0.1%
Pitney Bowes, Inc.		17,167		113,817
Semiconductors — 3.6%
Alpha & Omega Semiconductor Ltd. (a)		2,086		126,328
Ambarella, Inc. (a)		3,450		699,970
Amkor Technology, Inc.		9,959		246,884
Atomera, Inc. (a) (b)		1,990		40,039
Axcelis Technologies, Inc. (a)		3,238		241,425
AXT, Inc. (a)		3,962		34,905
CEVA, Inc. (a)		2,229		96,382
CMC Materials, Inc.		2,771		531,173
Cohu, Inc. (a)		4,688		178,566
CTS Corp.		3,158		115,962
Diodes, Inc. (a)		4,254		467,132
EMCORE Corp. (a)		3,612		25,212
FormFactor, Inc. (a)		7,580		346,558
Impinj, Inc. (a)		1,844		163,563
Kulicke & Soffa Industries, Inc.		5,973		361,605
Lattice Semiconductor Corp. (a)		13,254		1,021,353
MACOM Technology Solutions Holdings, Inc. (a)		4,746		371,612
MaxLinear, Inc. (a)		6,929		522,377
Onto Innovation, Inc. (a)		4,755		481,349
Ouster, Inc. (a) (b)		15,273		79,420
Photronics, Inc. (a)		5,773		108,821
Power Integrations, Inc.		5,899		547,958
Rambus, Inc. (a)		10,549		310,035
Semtech Corp. (a)		6,326		562,571
Silicon Laboratories, Inc. (a)		3,895		804,006

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
SiTime Corp. (a)		1,555	$	454,900
SkyWater Technology, Inc. (a) (b)		779		12,635
SMART Global Holdings, Inc. (a)		1,712		121,535
Synaptics, Inc. (a)		3,826		1,107,665
Ultra Clean Holdings, Inc. (a)		4,324		248,025
Veeco Instruments, Inc. (a)		4,926		140,243
				10,570,209
Software — 5.6%
1Life Healthcare, Inc. (a)		11,404		200,368
8x8, Inc. (a)		10,959		183,673
ACI Worldwide, Inc. (a)		11,502		399,119
Agilysys, Inc. (a)		2,069		91,988
Alignment Healthcare, Inc. (a)		7,742		108,853
Alkami Technology, Inc. (a)		2,769		55,546
Allscripts Healthcare Solutions, Inc. (a)		11,854		218,706
Altair Engineering, Inc. Class A (a)		4,498		347,785
American Software, Inc. Class A		3,097		81,048
Apollo Medical Holdings, Inc. (a)		3,676		270,112
Appfolio, Inc. Class A (a) (b)		1,850		223,961
Appian Corp. (a)		3,838		250,276
Arteris, Inc. (a)		488		10,302
Asana, Inc. Class A (a)		6,952		518,272
Avaya Holdings Corp. (a)		8,066		159,707
Avid Technology, Inc. (a)		3,531		115,005
AvidXchange Holdings, Inc. (a) (b)		2,480		37,349
Bandwidth, Inc. Class A (a)		2,257		161,962
Benefitfocus, Inc. (a)		2,438		25,989
BigCommerce Holdings, Inc. (a)		4,726		167,159
Blackbaud, Inc. (a)		4,678		369,468
Blackline, Inc. (a)		5,294		548,141
Bottomline Technologies de, Inc. (a)		4,372		246,887
Box, Inc. Class A (a)		13,630		356,970
Brightcove, Inc. (a)		4,041		41,299
BTRS Holdings, Inc. (a)		6,352		49,673
Cardlytics, Inc. (a)		3,158		208,712
Castlight Health, Inc. Class B (a)		11,808		18,184
Cerence, Inc. (a)		3,689		282,725
CommVault Systems, Inc. (a)		4,462		307,521
Computer Programs & Systems, Inc. (a)		1,401		41,049
Consensus Cloud Solutions, Inc. (a)		1,566		90,624
Convey Health Solutions Holdings, Inc. (a)		1,285		10,743
CoreCard Corp. (a)		719		27,897
CS Disco, Inc. (a)		746		26,670
CSG Systems International, Inc.		3,216		185,306
Daily Journal Corp. (a)		120		42,808
DarioHealth Corp. (a) (b)		1,311		17,004
Digi International, Inc. (a)		3,331		81,843
Digimarc Corp. (a) (b)		1,251		49,389
Digital Turbine, Inc. (a) (b)		8,862		540,493
DigitalOcean Holdings, Inc. (a)		4,953		397,875
Domo, Inc. Class B (a)		2,722		135,011
Donnelley Financial Solutions, Inc. (a)		2,880		135,763
E2open Parent Holdings, Inc. (a)		19,408		218,534
Ebix, Inc.		2,613		79,435
eGain Corp. (a)		2,018		20,140
Enfusion, Inc. Class A (a)		2,117		44,330
EngageSmart, Inc. (a)		1,570		37,868

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Envestnet, Inc. (a)		5,300	$	420,502
EverCommerce, Inc. (a)		1,646		25,925
Evolent Health, Inc. Class A (a)		7,787		215,466
Forian, Inc. (a)		1,823		16,443
Genius Brands International, Inc. (a) (b)		28,006		29,406
GreenBox POS (a) (b)		1,769		7,430
GTY Technology Holdings, Inc. (a)		3,179		21,299
Health Catalyst, Inc. (a)		5,090		201,666
HireRight Holdings Corp. (a)		2,166		34,656
IBEX Holdings Ltd. (a) (b)		560		7,218
Inseego Corp. (a) (b)		8,181		47,695
Instructure Holdings, Inc. (a)		1,187		28,464
Intapp, Inc. (a)		996		25,059
JFrog Ltd. (a)		5,181		153,876
Kaltura, Inc. (a)		1,671		5,631
LivePerson, Inc. (a)		6,403		228,715
ManTech International Corp. Class A		2,706		197,349
MeridianLink, Inc. (a)		1,236		26,673
MicroStrategy, Inc. Class A (a) (b)		826		449,749
Model N, Inc. (a) (b)		3,508		105,345
Momentive Global, Inc. (a)		12,641		267,357
NantHealth, Inc. (a)		2,418		2,551
NextGen Healthcare, Inc. (a)		5,542		98,592
ON24, Inc. (a)		2,638		45,769
Outbrain, Inc. (a)		788		11,032
Outset Medical, Inc. (a)		4,561		210,216
PagerDuty, Inc. (a) (b)		7,975		277,131
PDF Solutions, Inc. (a)		2,935		93,304
Phreesia, Inc. (a)		4,829		201,176
Porch Group, Inc. (a)		7,530		117,393
PowerSchool Holdings, Inc., Class A (a)		5,252		86,500
Privia Health Group, Inc. (a)		1,570		40,616
Progress Software Corp.		4,310		208,044
PROS Holdings, Inc. (a) (b)		3,907		134,752
Rackspace Technology, Inc. (a)		5,361		72,213
SailPoint Technologies Holding, Inc. (a)		8,929		431,628
Sapiens International Corp. NV		3,055		105,245
Schrodinger, Inc. /United States (a)		4,432		154,367
Simulations Plus, Inc. (b)		1,504		71,139
Smith Micro Software, Inc. (a)		4,491		22,096
Society Pass, Inc. (a)		308		3,206
Sprout Social, Inc. Class A (a)		4,416		400,487
SPS Commerce, Inc. (a)		3,523		501,499
Sumo Logic, Inc. (a)		8,485		115,057
Tabula Rasa HealthCare, Inc. (a)		2,221		33,315
Udemy, Inc. (a)		1,355		26,477
Upland Software, Inc. (a)		2,838		50,914
Verint Systems, Inc. (a)		6,276		329,553
Veritone, Inc. (a) (b)		2,795		62,832
Verra Mobility Corp. (a)		14,023		216,375
Viant Technology, Inc. (a)		1,129		10,957
Weave Communications, Inc. (a)		450		6,831
Workiva, Inc. (a)		4,182		545,709
Xperi Holding Corp.		10,198		192,844
Yext, Inc. (a)		10,989		109,011
Ziff Davis, Inc. (a)		4,243		470,379

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Zuora, Inc. Class A Class A (a)		10,838	$	202,454
				16,417,130
				33,747,469
Utilities — 2.7%
Electric — 1.3%
ALLETE, Inc.		5,102		338,518
Ameresco, Inc. Class A (a)		3,014		245,460
Avista Corp.		6,845		290,844
Black Hills Corp.		6,219		438,875
Clearway Energy, Inc. Class A		3,441		115,205
Clearway Energy, Inc. Class C		8,091		291,519
FTC Solar, Inc. (a) (b)		1,844		13,941
MGE Energy, Inc.		3,535		290,754
NorthWestern Corp. (b)		5,191		296,717
Ormat Technologies, Inc. (b)		4,422		350,665
Otter Tail Corp.		3,989		284,894
PNM Resources, Inc.		8,341		380,433
Portland General Electric Co.		8,782		464,743
Unitil Corp.		1,534		70,549
Via Renewables, Inc. (b)		1,159		13,247
				3,886,364
Gas — 0.9%
Brookfield Infrastructure Corp. Class A (b)		6,025		411,267
Chesapeake Utilities Corp.		1,666		242,920
New Jersey Resources Corp.		9,415		386,580
Northwest Natural Holding Co.		3,019		147,267
ONE Gas, Inc.		5,139		398,735
South Jersey Industries, Inc. (b)		10,012		261,513
Southwest Gas Holdings, Inc.		5,928		415,256
Spire, Inc.		4,924		321,143
				2,584,681
Water — 0.5%
American States Water Co.		3,588		371,143
Artesian Resources Corp. Class A		808		37,435
California Water Service Group		5,153		370,295
Global Water Resources, Inc.		1,254		21,443
Middlesex Water Co.		1,695		203,908
SJW Group		2,664		195,005
The York Water Co.		1,280		63,718
				1,262,947
				7,733,992
TOTAL COMMON STOCK (Cost $232,688,202)				290,284,745
TOTAL EQUITIES (Cost $232,688,202)				290,284,745

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
WARRANTS — 0.0%
Energy — 0.0% Oil & Gas — 0.0%
Nabors Industries Ltd. (a) (b)		326	$	1,216
TOTAL WARRANTS (Cost $0)				1,216
RIGHTS — 0.0%
Consumer, Non-cyclical — 0.0%
Biotechnology — 0.0%
Aduro Biotech, Inc., CVR (a) (c) (d)		1,859		—
Tobira Therapeutics Inc., CVR (a) (c) (d)		1,376		10,471
				10,471
Pharmaceuticals — 0.0%
GTx, Inc., CVR (a) (b) (c) (d)		111		—
				10,471
TOTAL RIGHTS (Cost $310)				10,471
	Principal Amount
BONDS & NOTES — 0.0%
CORPORATE DEBT — 0.0%
Diversified Financial Services — 0.0%
GAMCO Investors, Inc.	$	1,000		990
TOTAL CORPORATE DEBT (Cost $1,000)				990
TOTAL BONDS & NOTES (Cost $1,000)				990
	Number of Shares
MUTUAL FUNDS — 1.3%
Diversified Financial Services — 1.3%
State Street Navigator Securities Lending Government Money Market Portfolio (e)		3,792,218		3,792,218
TOTAL MUTUAL FUNDS (Cost $3,792,218)				3,792,218
TOTAL LONG-TERM INVESTMENTS (Cost $236,481,730)				294,089,640

MM Russell 2000 Small Cap Index Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
SHORT-TERM INVESTMENTS — 0.7%
Repurchase Agreement — 0.3%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (f)	$	1,034,016	$	1,034,016
U.S. Treasury Bill — 0.4%
U.S. Treasury Bill
0.038% 1/27/22 (g) (h)		1,155,000		1,154,978
TOTAL SHORT-TERM INVESTMENTS (Cost $2,188,984)				2,188,994
TOTAL INVESTMENTS — 101.6% (Cost $238,670,714) (i)				296,278,634
Other Assets/(Liabilities) — (1.6)%				(4,697,222)
NET ASSETS — 100.0%			$	291,581,412

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) Denotes all or a portion of security on loan. The total value of securities on loan as of December 31, 2021, was $13,254,844 or 4.55% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $9,821,504 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) Investment was valued using significant unobservable inputs.

(d) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At December 31, 2021, these securities amounted to a value of $10,471 or 0.00% of net assets.

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

(f) Maturity value of $1,034,016. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $1,054,702.

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

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

(i) 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
Russell 2000 E Mini Index	3/18/22		20	$	2,180,582	$	62,218

MassMutual Mid Cap Growth Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.5%
COMMON STOCK — 98.1%
Basic Materials — 0.8%
Chemicals — 0.7%
RPM International, Inc.		397,000	$	40,097,000
The Sherwin-Williams Co.		50,365		17,736,537
				57,833,537
Mining — 0.1%
Kirkland Lake Gold Ltd.		219,000		9,187,050
				67,020,587
Communications — 6.2%
Advertising — 0.4%
The Trade Desk, Inc. Class A (a)		406,167		37,221,144
Internet — 4.5%
Chewy, Inc. Class A (a) (b)		239,920		14,148,083
Deliveroo PLC Class A (a) (c)		3,494,800		9,873,442
DoorDash, Inc., Class A (a)		61,000		9,082,900
Etsy, Inc. (a)		199,000		43,569,060
Farfetch Ltd. Class A (a)		434,000		14,508,620
IAC/InterActiveCorp (a)		392,859		51,350,599
Match Group, Inc. (a)		173,000		22,879,250
Okta, Inc. (a)		119,477		26,783,159
Palo Alto Networks, Inc. (a)		140,715		78,344,484
Roku, Inc. (a)		93,926		21,433,913
Spotify Technology SA (a)		242,000		56,635,260
Twitter, Inc. (a)		329,742		14,251,449
Upwork, Inc. (a)		256,000		8,744,960
Vimeo, Inc. (a)		1,029,727		18,493,897
				390,099,076
Media — 0.6%
Liberty Media Corp-Liberty Formula One Class C (a)		753,000		47,619,720
Telecommunications — 0.7%
Arista Networks, Inc. (a)		93,879		13,495,106
Corning, Inc.		1,316,000		48,994,680
				62,489,786
				537,429,726
Consumer, Cyclical — 18.2%
Airlines — 0.8%
Azul SA (a) (b)		982,695		12,971,574

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

	Number of Shares		Value
Southwest Airlines Co. (a)		1,224,000	$	52,436,160
				65,407,734
Apparel — 0.4%
Deckers Outdoor Corp. (a)		44,000		16,117,640
On Holding AG, Class A (a)		66,000		2,495,460
VF Corp.		211,000		15,449,420
				34,062,520
Auto Manufacturers — 1.7%
Rivian Automotive, Inc., Lockup Shares (Acquired 12/23/19-7/10/20, Cost $17,656,722) (a) (d) (e)		1,469,560		144,759,743
Auto Parts & Equipment — 0.3%
Aptiv PLC (a)		129,000		21,278,550
BorgWarner, Inc.		202,813		9,140,782
				30,419,332
Distribution & Wholesale — 0.2%
Leslie's, Inc. (a)		837,255		19,809,453
Entertainment — 2.2%
Caesars Entertainment, Inc. (a)		860,666		80,498,091
DraftKings, Inc. Class A (a) (b)		423,000		11,619,810
Live Nation Entertainment, Inc. (a)		435,455		52,119,609
Vail Resorts, Inc.		145,000		47,545,500
				191,783,010
Leisure Time — 0.5%
Peloton Interactive, Inc. Class A (a)		194,000		6,937,440
Planet Fitness, Inc. Class A (a)		441,645		40,004,204
				46,941,644
Lodging — 1.8%
Hilton Worldwide Holdings, Inc. (a)		677,000		105,605,230
MGM Resorts International		1,145,000		51,387,600
				156,992,830
Retail — 9.3%
Advance Auto Parts, Inc.		151,669		36,382,360
Bath & Body Works, Inc.		302,000		21,076,580
Bed Bath & Beyond, Inc. (a) (b)		362,555		5,286,052
Burlington Stores, Inc. (a)		431,975		125,925,032
Carvana Co. (a)		41,259		9,563,424
Casey's General Stores, Inc.		346,000		68,283,100
Chipotle Mexican Grill, Inc. (a)		55,510		97,045,358
Darden Restaurants, Inc.		129,789		19,551,415
Dollar General Corp.		426,945		100,686,439
Dollar Tree, Inc. (a)		363,000		51,008,760
Domino's Pizza, Inc.		85,000		47,968,050
Five Below, Inc. (a)		110,000		22,757,900
Floor & Decor Holdings, Inc. Class A (a)		175,225		22,781,002
Lululemon Athletica, Inc. (a)		107,067		41,911,377
O'Reilly Automotive, Inc. (a)		101,535		71,707,063

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

	Number of Shares		Value
Olaplex Holdings, Inc. (a)		358,000	$	10,428,540
Ross Stores, Inc.		483,396		55,242,495
Warby Parker, Inc. Class A (a)		53,000		2,467,680
				810,072,627
Toys, Games & Hobbies — 1.0%
Mattel, Inc. (a)		3,852,477		83,059,404
				1,583,308,297
Consumer, Non-cyclical — 28.3%
Beverages — 0.3%
The Boston Beer Co., Inc. Class A (a)		53,000		26,770,300
Biotechnology — 2.6%
Alnylam Pharmaceuticals, Inc. (a)		272,000		46,125,760
Argenx SE ADR (a)		107,000		37,470,330
BioMarin Pharmaceutical, Inc. (a)		89,276		7,887,535
Exelixis, Inc. (a)		405,000		7,403,400
Guardant Health, Inc. (a)		142,380		14,240,847
Horizon Therapeutics PLC (a)		130,888		14,104,491
Illumina, Inc. (a)		24,393		9,280,073
Incyte Corp. (a)		122,000		8,954,800
Ionis Pharmaceuticals, Inc. (a)		639,000		19,444,770
Kodiak Sciences, Inc. (a)		53,000		4,493,340
Seagen, Inc. (a)		298,000		46,070,800
Ultragenyx Pharmaceutical, Inc. (a)		169,000		14,211,210
				229,687,356
Commercial Services — 7.1%
Block, Inc. (a)		224,297		36,226,208
Bright Horizons Family Solutions, Inc. (a)		384,885		48,449,324
Cintas Corp.		109,105		48,352,063
CoStar Group, Inc. (a)		697,000		55,083,910
Dlocal Ltd. (a)		398,534		14,223,678
Equifax, Inc.		217,000		63,535,430
FleetCor Technologies, Inc. (a)		296,000		66,256,640
Global Payments, Inc.		112,676		15,231,542
GXO Logistics, Inc. (a)		147,984		13,441,387
Legalzoom.com Inc. (a)		47,937		770,348
MarketAxess Holdings, Inc.		78,000		32,079,060
Moody's Corp.		38,491		15,033,815
Multiplan Corp. (a) (b)		2,668,000		11,819,240
Quanta Services, Inc.		275,401		31,577,479
Terminix Global Holdings, Inc. (a)		1,045,000		47,265,350
Toast, Inc., Class A (a)		23,198		805,202
TransUnion		730,000		86,563,400
Verisk Analytics, Inc.		149,000		34,080,770
				620,794,846
Food — 0.3%
TreeHouse Foods, Inc. (a)		585,000		23,710,050
Health Care – Products — 11.6%
Alcon, Inc. (b)		775,476		67,559,469
Align Technology, Inc. (a)		44,729		29,395,004

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

	Number of Shares		Value
Avantor, Inc. (a)		2,490,000	$	104,928,600
Bruker Corp.		1,304,000		109,418,640
The Cooper Cos., Inc.		218,000		91,328,920
Edwards Lifesciences Corp. (a)		94,249		12,209,958
Exact Sciences Corp. (a)		408,205		31,770,595
Hologic, Inc. (a)		2,444,203		187,128,181
ICU Medical, Inc. (a)		155,000		36,787,700
IDEXX Laboratories, Inc. (a)		40,654		26,769,033
Insulet Corp. (a)		88,612		23,576,995
Natera, Inc. (a)		131,938		12,321,690
Novocure Ltd. (a)		104,181		7,821,909
Ortho Clinical Diagnostics Holdings PLC Class H (a)		1,032,000		22,074,480
Quidel Corp. (a)		300,000		40,497,000
ResMed, Inc.		29,537		7,693,798
Teleflex, Inc.		415,739		136,561,947
West Pharmaceutical Services, Inc.		141,000		66,130,410
				1,013,974,329
Health Care – Services — 3.5%
Acadia Healthcare Co., Inc. (a)		890,000		54,023,000
agilon health, Inc. (a)		238,000		6,426,000
Amedisys, Inc. (a)		55,295		8,951,155
Catalent, Inc. (a)		1,258,000		161,061,740
Humana, Inc.		56,275		26,103,721
Molina Healthcare, Inc. (a)		147,128		46,798,474
				303,364,090
Household Products & Wares — 1.0%
Avery Dennison Corp.		289,000		62,588,730
Reynolds Consumer Products, Inc.		687,000		21,571,800
				84,160,530
Pharmaceuticals — 1.9%
Alkermes PLC (a)		1,149,000		26,725,740
Dentsply Sirona, Inc.		291,000		16,234,890
DexCom, Inc. (a)		64,936		34,867,385
Elanco Animal Health, Inc. (a)		1,077,520		30,580,018
Neurocrine Biosciences, Inc. (a)		252,000		21,462,840
Perrigo Co. PLC		733,000		28,513,700
Sarepta Therapeutics, Inc. (a)		110,140		9,918,107
				168,302,680
				2,470,764,181
Energy — 0.2%
Energy – Alternate Sources — 0.1%
Shoals Technologies Group, Inc. Class A (a)		394,000		9,574,200
Oil & Gas — 0.1%
Venture Global LNG, Inc., Series B (Acquired 3/08/18, Cost $652,320) (a) (d) (e) (f)		216		1,285,237

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

	Number of Shares		Value
Venture Global LNG, Inc., Series C (Acquired 10/16/17-3/08/18, Cost $4,872,708) (a) (d) (e) (f)		1,328	$	7,901,826
				9,187,063
				18,761,263
Financial — 6.6%
Banks — 1.1%
SVB Financial Group (a)		108,227		73,403,880
Webster Financial Corp.		431,000		24,067,040
				97,470,920
Diversified Financial Services — 2.1%
Cboe Global Markets, Inc.		346,000		45,118,400
LPL Financial Holdings, Inc.		164,220		26,289,980
Raymond James Financial, Inc.		197,000		19,778,800
SoFi Technologies, Inc. (a) (b)		1,269,000		20,062,890
Tradeweb Markets, Inc. Class A		743,000		74,404,020
				185,654,090
Insurance — 1.7%
Aon PLC Class A		152,987		45,981,773
Assurant, Inc.		341,000		53,148,260
Axis Capital Holdings Ltd.		626,000		34,098,220
Kemper Corp.		220,000		12,933,800
				146,162,053
Private Equity — 1.6%
KKR & Co., Inc.		1,949,258		145,219,721
Real Estate — 0.1%
eXp World Holdings, Inc.		141,000		4,750,290
				579,257,074
Industrial — 17.0%
Aerospace & Defense — 0.4%
BWX Technologies, Inc.		719,000		34,425,720
Building Materials — 0.7%
Builders FirstSource, Inc. (a)		246,760		21,149,800
Martin Marietta Materials, Inc.		90,000		39,646,800
				60,796,600
Electrical Components & Equipment — 0.1%
Littelfuse, Inc.		34,000		10,699,120
Electronics — 5.0%
Agilent Technologies, Inc.		939,677		150,019,433
Amphenol Corp. Class A		689,216		60,278,831
Fortive Corp.		801,000		61,108,290
II-VI, Inc. (a) (b)		288,799		19,733,636
Keysight Technologies, Inc. (a)		470,000		97,059,700

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

	Number of Shares		Value
National Instruments Corp.		1,061,000	$	46,333,870
				434,533,760
Engineering & Construction — 0.2%
MasTec, Inc. (a)		192,670		17,779,587
Environmental Controls — 0.7%
Waste Connections, Inc.		423,819		57,753,815
Machinery – Diversified — 3.4%
Cognex Corp.		212,000		16,485,120
Colfax Corp. (a)		1,558,000		71,621,260
IDEX Corp.		278,000		65,696,960
Ingersoll Rand, Inc.		2,374,000		146,879,380
				300,682,720
Miscellaneous - Manufacturing — 1.8%
Textron, Inc.		2,029,000		156,638,800
Packaging & Containers — 3.1%
Ardagh Metal Packaging SA (a)		865,381		7,814,391
Ball Corp.		1,978,186		190,439,966
Packaging Corp. of America		70,000		9,530,500
Sealed Air Corp.		928,000		62,612,160
				270,397,017
Transportation — 1.6%
J.B. Hunt Transport Services, Inc.		540,000		110,376,000
Knight-Swift Transportation Holdings, Inc.		322,397		19,646,873
XPO Logistics, Inc. (a)		169,209		13,101,853
				143,124,726
				1,486,831,865
Technology — 20.6%
Computers — 2.0%
Crowdstrike Holdings, Inc. Class A (a)		150,000		30,712,500
Fortinet, Inc. (a)		219,000		78,708,600
Genpact Ltd.		409,982		21,761,844
KBR, Inc.		530,235		25,249,791
Leidos Holdings, Inc.		190,000		16,891,000
Thoughtworks Holding, Inc. (a)		197,823		5,303,635
				178,627,370
Semiconductors — 8.9%
Advanced Micro Devices, Inc. (a)		315,255		45,365,194
Entegris, Inc.		523,000		72,477,340
KLA Corp.		302,579		130,142,253
Lam Research Corp.		33,948		24,413,704
Lattice Semiconductor Corp. (a)		196,000		15,103,760
Marvell Technology, Inc.		2,284,612		199,880,704
Microchip Technology, Inc.		2,402,349		209,148,504
Skyworks Solutions, Inc.		295,000		45,766,300

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

	Number of Shares		Value
Wolfspeed, Inc. (a)		340,836	$	38,095,240
				780,392,999
Software — 9.7%
Atlassian Corp. PLC Class A (a)		141,938		54,119,540
Autodesk, Inc. (a)		53,066		14,921,628
BigCommerce Holdings, Inc. (a)		191,388		6,769,394
Bill.com Holdings, Inc. (a)		91,000		22,672,650
Black Knight, Inc. (a)		647,000		53,629,830
Broadridge Financial Solutions, Inc.		103,000		18,830,460
CCC Intelligent Solutions Holdings, Inc. (a)		974,000		11,093,860
Ceridian HCM Holding, Inc. (a)		675,000		70,510,500
Citrix Systems, Inc.		363,000		34,336,170
Clarivate PLC (a)		2,912,000		68,490,240
Clear Secure Inc. Class A (a)		106,028		3,326,098
Coupa Software, Inc. (a)		110,991		17,542,128
DocuSign, Inc. (a)		315,000		47,977,650
Doximity, Inc. Class A (a)		189,000		9,474,570
Fair Isaac Corp. (a)		46,159		20,017,773
HashiCorp, Inc. Class A (a)		10,971		998,800
HubSpot, Inc. (a)		34,644		22,835,593
MongoDB, Inc. (a)		54,207		28,694,475
MSCI, Inc.		63,243		38,748,354
nCino, Inc. (a)		148,000		8,119,280
Paycom Software, Inc. (a)		107,860		44,782,393
Playtika Holding Corp. (a)		530,000		9,163,700
Procore Technologies, Inc. (a) (b)		59,000		4,718,230
PTC, Inc. (a)		302,000		36,587,300
Roper Technologies, Inc.		113,000		55,580,180
SentinelOne Inc. Class A (a)		158,000		7,977,420
Signify Health, Inc. Class A (a) (b)		628,958		8,943,783
Veeva Systems, Inc. Class A (a)		312,276		79,780,272
Workday, Inc. Class A (a)		70,542		19,270,664
Zynga, Inc. Class A (a)		3,508,000		22,451,200
				842,364,135
				1,801,384,504
Utilities — 0.2%
Electric — 0.2%
Ameren Corp.		17,000		1,513,170
Eversource Energy		171,000		15,557,580
				17,070,750
TOTAL COMMON STOCK (Cost $5,636,778,625)				8,561,828,247
PREFERRED STOCK — 0.4%
Consumer, Cyclical — 0.0%
Auto Manufacturers — 0.0%
Nuro, Inc., Series D (Acquired 10/29/21, Cost $3,125,295) (a) (d) (e) (f)		149,925		3,125,295

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

	Number of Shares		Value
Consumer, Non-cyclical — 0.1%
Commercial Services — 0.0%
Redwood Materials, Inc., Series C (Acquired 5/28/21, Cost $3,678,889) (a) (d) (e) (f)		77,608	$	3,678,889
Health Care – Services — 0.1%
Caris Life Sciences, Inc., Series D (Acquired 5/11/21, Cost $5,006,003) (a) (d) (e) (f)		618,025		5,006,003
				8,684,892
Financial — 0.1%
Investment Companies — 0.1%
Maplebear, Inc., Series E (Acquired 11/19/21-12/01/21, Cost $10,196,717) (a) (d) (e) (f)		84,807		10,070,831
Maplebear, Inc., Series I (Acquired 2/26/21, Cost $1,765,375) (a) (d) (e) (f)		14,123		1,677,106
				11,747,937
Industrial — 0.1%
Electrical Components & Equipment — 0.1%
Sila Nanotechnologies, Inc., Series F (Acquired 1/07/21, Cost $7,310,569) (a) (d) (e) (f)		177,128		7,310,569
Technology — 0.1%
Software — 0.1%
Databricks, Inc., Series G (Acquired 2/01/21, Cost $2,400,675) (a) (d) (e) (f)		13,535		2,739,755
Databricks, Inc., Series H (Acquired 8/31/21, Cost $3,616,301) (a) (d) (e) (f)		16,404		3,320,498
				6,060,253
TOTAL PREFERRED STOCK (Cost $37,099,821)				36,928,946
TOTAL EQUITIES (Cost $5,673,878,446)				8,598,757,193
MUTUAL FUNDS — 0.7%
Diversified Financial Services — 0.7%
State Street Navigator Securities Lending Government Money Market Portfolio (g)		62,714,082		62,714,082
TOTAL MUTUAL FUNDS (Cost $62,714,082)				62,714,082
TOTAL LONG-TERM INVESTMENTS (Cost $5,736,592,528)				8,661,471,275
SHORT-TERM INVESTMENTS — 2.3%
Mutual Fund — 1.2%
T. Rowe Price Government Reserve Investment Fund		103,905,748		103,905,748

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

	Principal Amount		Value
Repurchase Agreement — 1.1%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (h)	$	92,604,728	$	92,604,728
TOTAL SHORT-TERM INVESTMENTS (Cost $196,510,476)				196,510,476
TOTAL INVESTMENTS — 101.5% (Cost $5,933,103,004) (i)				8,857,981,751
Other Assets/(Liabilities) — (1.5)%				(133,329,109)
NET ASSETS — 100.0%			$	8,724,652,642

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 December 31, 2021, was $120,446,520 or 1.38% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $60,650,804 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

(c) Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At December 31, 2021, the aggregate market value of these securities amounted to $9,873,442 or 0.11% of net assets.

(d) Restricted security. Certain securities are restricted as to resale. At December 31, 2021, these securities amounted to a value of $190,875,752 or 2.19% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

(e) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At December 31, 2021, these securities amounted to a value of $190,875,752 or 2.19% of net assets.

(f) Investment was valued using significant unobservable inputs.

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

(h) Maturity value of $92,604,728. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $94,456,932.

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

MassMutual Small Cap Growth Equity Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.4%
COMMON STOCK — 99.4%
Basic Materials — 2.4%
Chemicals — 2.3%
Cabot Corp.		40,917	$	2,299,535
Element Solutions, Inc.		159,977		3,884,242
Methanex Corp. (a)		59,618		2,357,892
Olin Corp.		100,018		5,753,035
Rogers Corp. (b)		13,807		3,769,311
				18,064,015
Mining — 0.1%
Livent Corp. (b)		32,099		782,574
				18,846,589
Communications — 5.2%
Internet — 3.5%
Cargurus, Inc. (b)		115,876		3,898,069
Criteo SA Sponsored ADR (b)		79,435		3,087,639
Mimecast Ltd. (b)		52,356		4,165,967
Overstock.com, Inc. (b)		19,998		1,180,082
Perficient, Inc. (b)		42,496		5,494,308
RealReal, Inc. (b)		109,322		1,269,228
Revolve Group, Inc. (b)		39,511		2,214,196
Shutterstock, Inc.		51,517		5,712,205
				27,021,694
Media — 0.2%
The New York Times Co. Class A		33,338		1,610,225
Telecommunications — 1.5%
Calix, Inc. (b)		84,636		6,768,341
Ciena Corp. (b)		26,718		2,056,484
Viavi Solutions, Inc. (b)		142,232		2,506,128
				11,330,953
				39,962,872
Consumer, Cyclical — 13.9%
Apparel — 1.6%
Carter's, Inc.		18,229		1,845,139
Crocs, Inc. (b)		24,798		3,179,600
Deckers Outdoor Corp. (b)		2,789		1,021,639
Oxford Industries, Inc.		29,527		2,997,581
Steven Madden Ltd.		61,068		2,837,830

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

	Number of Shares		Value
Wolverine World Wide, Inc.		22,957	$	661,391
				12,543,180
Auto Parts & Equipment — 1.0%
Dana, Inc.		135,627		3,095,008
Fox Factory Holding Corp. (b)		29,092		4,948,549
				8,043,557
Distribution & Wholesale — 1.1%
SiteOne Landscape Supply, Inc. (b)		25,387		6,150,762
WESCO International, Inc. (b)		15,438		2,031,487
				8,182,249
Entertainment — 0.8%
Cinemark Holdings, Inc. (b)		101,468		1,635,664
Red Rock Resorts, Inc. Class A		80,004		4,401,020
				6,036,684
Food Services — 0.3%
Sovos Brands, Inc. (b)		153,112		2,304,336
Home Builders — 1.1%
Cavco Industries, Inc. (b)		5,068		1,609,850
Skyline Champion Corp. (b)		89,922		7,102,040
				8,711,890
Leisure Time — 1.2%
Acushnet Holdings Corp.		34,196		1,815,124
Planet Fitness, Inc. Class A (b)		36,680		3,322,474
YETI Holdings, Inc. (b)		48,826		4,044,258
				9,181,856
Lodging — 0.8%
Boyd Gaming Corp. (b)		32,524		2,132,598
Choice Hotels International, Inc.		28,321		4,417,793
				6,550,391
Retail — 6.0%
BJ's Restaurants, Inc. (b)		47,750		1,649,763
Boot Barn Holdings, Inc. (b)		47,301		5,820,388
Denny's Corp. (b)		107,689		1,723,024
Dutch Bros, Inc., Class A (b)		12,606		641,771
FirstCash Holdings, Inc.		30,622		2,290,832
Five Below, Inc. (b)		25,873		5,352,865
Floor & Decor Holdings, Inc. Class A (b)		17,667		2,296,887
Freshpet, Inc. (b)		25,445		2,424,145
La-Z-Boy, Inc.		33,437		1,214,097
National Vision Holdings, Inc. (b)		55,178		2,647,992
Nu Skin Enterprises, Inc. Class A		55,123		2,797,492
Ollie's Bargain Outlet Holdings, Inc. (a) (b)		34,436		1,762,779
Papa John's International, Inc.		34,558		4,612,456
Portillo's, Inc. Class A (b)		23,758		891,875
Rush Enterprises, Inc. Class A		43,640		2,428,130
Victoria's Secret & Co. (b)		38,555		2,141,345

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

	Number of Shares		Value
Wingstop, Inc.		32,016	$	5,532,365
				46,228,206
				107,782,349
Consumer, Non-cyclical — 22.6%
Biotechnology — 4.8%
Akero Therapeutics, Inc. (b)		28,458		601,887
ALX Oncology Holdings, Inc. (b)		22,805		490,079
Amicus Therapeutics, Inc. (b)		191,222		2,208,614
Apellis Pharmaceuticals, Inc. (b)		40,475		1,913,658
Arena Pharmaceuticals, Inc. (b)		21,814		2,027,393
Ascendis Pharma A/S ADR (b)		10,096		1,358,215
BioAtla, Inc. (b)		31,434		617,049
Blueprint Medicines Corp. (b)		16,833		1,802,983
Celldex Therapeutics, Inc. (b)		13,540		523,186
Certara, Inc. (b)		21,314		605,744
Crinetics Pharmaceuticals, Inc. (b)		17,400		494,334
Fate Therapeutics, Inc. (b)		16,573		969,686
Halozyme Therapeutics, Inc. (b)		75,656		3,042,128
ImmunoGen, Inc. (b)		167,676		1,244,156
Karuna Therapeutics, Inc. (b)		6,435		842,985
Kodiak Sciences, Inc. (b)		15,150		1,284,417
Kymera Therapeutics, Inc. (b)		22,903		1,454,111
Mersana Therapeutics, Inc. (b)		61,001		379,426
Myriad Genetics, Inc. (b)		56,788		1,567,349
NeoGenomics, Inc. (b)		60,040		2,048,565
RAPT Therapeutics, Inc. (b)		25,819		948,332
Relay Therapeutics, Inc. (b)		30,300		930,513
Revolution Medicines, Inc. (b)		44,590		1,122,330
Rocket Pharmaceuticals, Inc. (b)		54,850		1,197,376
Sage Therapeutics, Inc. (b)		12,479		530,857
Scholar Rock Holding Corp. (b)		16,514		410,208
Turning Point Therapeutics, Inc. (b)		33,138		1,580,683
Veracyte, Inc. (b)		106,782		4,399,418
Y-mAbs Therapeutics, Inc. (b)		53,268		863,474
				37,459,156
Commercial Services — 3.8%
AMN Healthcare Services, Inc. (b)		13,080		1,600,077
ASGN, Inc. (b)		6,486		800,372
Cross Country Healthcare, Inc. (b)		134,824		3,742,714
Herc Holdings, Inc.		43,668		6,836,226
LiveRamp Holdings, Inc. (b)		41,660		1,997,597
Mister Car Wash, Inc. (b)		114,244		2,080,383
Paylocity Holding Corp. (b)		12,887		3,043,394
Payoneer Global, Inc. (b)		132,625		974,794
R1 RCM, Inc. (b)		119,823		3,054,288
Repay Holdings Corp. (a) (b)		89,689		1,638,618
Textainer Group Holdings Ltd. (a)		62,623		2,236,267
TriNet Group, Inc. (b)		14,523		1,383,461
				29,388,191
Food — 0.4%
BellRing Brands, Inc. Class A (b)		35,146		1,002,716

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

	Number of Shares		Value
Performance Food Group Co. (b)		43,388	$	1,991,075
				2,993,791
Health Care – Products — 9.0%
AtriCure, Inc. (b)		11,596		806,270
Axonics Inc. (b)		55,330		3,098,480
CareDx, Inc. (b)		38,604		1,755,710
Glaukos Corp. (b)		36,037		1,601,484
Globus Medical, Inc. Class A (b)		101,400		7,321,080
Haemonetics Corp. (b)		33,902		1,798,162
Inari Medical, Inc. (b)		29,333		2,677,223
Inmode Ltd. (b)		16,585		1,170,569
Inspire Medical Systems, Inc. (b)		41,142		9,465,129
Integra LifeSciences Holdings Corp. (b)		46,872		3,139,955
Masimo Corp. (b)		11,259		3,296,410
NanoString Technologies, Inc. (b)		49,060		2,071,804
Omnicell, Inc. (b)		39,771		7,176,279
Penumbra, Inc. (b)		13,792		3,962,718
Quanterix Corp. (b)		19,487		826,249
Repligen Corp. (b)		26,937		7,133,995
Shockwave Medical, Inc. (b)		13,492		2,406,028
Tandem Diabetes Care, Inc. (b)		64,708		9,739,848
				69,447,393
Health Care – Services — 3.3%
Acadia Healthcare Co., Inc. (b)		34,535		2,096,274
Accolade, Inc. (a) (b)		56,225		1,482,091
Amedisys, Inc. (b)		12,975		2,100,393
LHC Group, Inc. (b)		38,921		5,341,129
Medpace Holdings, Inc. (b)		51,719		11,256,123
Surgery Partners, Inc. (a) (b)		53,629		2,864,325
				25,140,335
Household Products & Wares — 0.3%
Spectrum Brands Holdings, Inc.		23,078		2,347,494
Pharmaceuticals — 1.0%
Aclaris Therapeutics, Inc. (b)		52,455		762,696
Covetrus, Inc. (b)		60,700		1,212,179
Intellia Therapeutics, Inc. (b)		10,374		1,226,622
KalVista Pharmaceuticals, Inc. (b)		38,320		506,973
Madrigal Pharmaceuticals, Inc. (b)		7,805		661,396
Myovant Sciences Ltd. (b)		43,498		677,264
Owens & Minor, Inc.		60,515		2,632,402
				7,679,532
				174,455,892
Energy — 2.8%
Energy – Alternate Sources — 0.8%
Atlantica Sustainable Infrastructure PLC		65,636		2,347,143
First Solar, Inc. (b)		23,375		2,037,365
Maxeon Solar Technologies Ltd. (a) (b)		111,206		1,545,764

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

	Number of Shares		Value
Stem, Inc. (a) (b)		27,020	$	512,569
				6,442,841
Oil & Gas — 2.0%
Brigham Minerals, Inc. Class A		54,446		1,148,266
Chesapeake Energy Corp.		56,957		3,674,866
Magnolia Oil & Gas Corp. Class A		135,918		2,564,773
Matador Resources Co.		85,838		3,169,139
Viper Energy Partners LP (c)		109,130		2,325,560
Whiting Petroleum Corp. (b)		36,393		2,353,899
				15,236,503
				21,679,344
Financial — 13.8%
Banks — 4.4%
Ameris Bancorp		110,931		5,511,052
Atlantic Union Bankshares Corp.		75,318		2,808,608
Cadence Bank		75,577		2,251,439
First Interstate BancSystem, Inc. Class A		48,727		1,981,727
Great Western Bancorp, Inc.		70,478		2,393,433
National Bank Holdings Corp. Class A		64,592		2,838,172
Pinnacle Financial Partners, Inc.		45,726		4,366,833
Seacoast Banking Corp. of Florida		83,608		2,958,887
Silvergate Capital Corp. Class A (b)		9,454		1,401,083
Simmons First National Corp. Class A		82,892		2,451,945
Synovus Financial Corp.		45,042		2,156,161
Western Alliance Bancorp		28,610		3,079,867
				34,199,207
Diversified Financial Services — 3.5%
Air Lease Corp.		66,032		2,920,596
Cohen & Steers, Inc.		27,328		2,528,113
Evercore, Inc. Class A		26,660		3,621,761
Hamilton Lane, Inc. Class A		56,708		5,876,083
Hannon Armstrong Sustainable Infrastructure Capital, Inc.		70,623		3,751,494
LPL Financial Holdings, Inc.		26,442		4,233,100
PRA Group, Inc. (b)		61,554		3,090,626
StepStone Group, Inc. Class A		18,769		780,227
				26,802,000
Insurance — 1.7%
Assured Guaranty Ltd.		51,085		2,564,467
Kemper Corp.		34,610		2,034,722
Kinsale Capital Group, Inc.		12,960		3,083,054
MGIC Investment Corp.		80,671		1,163,276
Selective Insurance Group, Inc.		34,333		2,813,246
SiriusPoint Ltd. (b)		177,537		1,443,376
				13,102,141
Real Estate — 0.3%
McGrath RentCorp		31,502		2,528,350
Real Estate Investment Trusts (REITS) — 3.9%
Centerspace		18,449		2,045,994

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

	Number of Shares		Value
Essential Properties Realty Trust, Inc.		162,519	$	4,685,423
Hudson Pacific Properties, Inc.		70,426		1,740,227
Independence Realty Trust, Inc.		95,107		2,456,614
Life Storage, Inc.		15,219		2,331,246
National Storage Affiliates Trust		52,742		3,649,746
Pebblebrook Hotel Trust		55,081		1,232,162
Phillips Edison & Co., Inc.		57,500		1,899,800
PotlatchDeltic Corp.		44,353		2,670,938
PS Business Parks, Inc.		16,565		3,050,776
Ryman Hospitality Properties, Inc. (b)		24,957		2,295,046
Xenia Hotels & Resorts, Inc. (b)		119,367		2,161,736
				30,219,708
				106,851,406
Industrial — 19.8%
Aerospace & Defense — 0.7%
Mercury Systems, Inc. (b)		51,099		2,813,511
Spirit AeroSystems Holdings, Inc. Class A		61,596		2,654,172
				5,467,683
Building Materials — 2.4%
Builders FirstSource, Inc. (b)		47,308		4,054,769
Gibraltar Industries, Inc. (b)		25,148		1,676,868
Louisiana-Pacific Corp.		35,832		2,807,437
Patrick Industries, Inc.		28,729		2,318,143
SPX Corp. (b)		28,107		1,677,426
Trex Co., Inc. (b)		43,338		5,851,930
				18,386,573
Electrical Components & Equipment — 1.4%
Acuity Brands, Inc.		13,910		2,945,025
EnerSys		27,262		2,155,334
Novanta, Inc. (b)		32,863		5,794,733
				10,895,092
Electronics — 0.4%
II-VI, Inc. (a) (b)		44,974		3,073,073
Engineering & Construction — 1.5%
Fluor Corp. (a) (b)		265,666		6,580,547
WillScot Mobile Mini Holdings Corp. (b)		120,106		4,905,129
				11,485,676
Environmental Controls — 1.3%
Casella Waste Systems, Inc. Class A (b)		65,356		5,582,710
Clean Harbors, Inc. (b)		42,251		4,215,382
				9,798,092
Hand & Machine Tools — 0.6%
Kennametal, Inc.		69,898		2,510,037
Regal Rexnord Corp.		11,825		2,012,379
				4,522,416

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

	Number of Shares		Value
Machinery – Diversified — 6.1%
Albany International Corp. Class A		26,553	$	2,348,613
Altra Industrial Motion Corp.		71,789		3,702,159
Applied Industrial Technologies, Inc.		49,369		5,070,196
Chart Industries, Inc. (b)		40,636		6,481,036
Colfax Corp. (b)		73,056		3,358,384
Curtiss-Wright Corp.		20,159		2,795,448
Hydrofarm Holdings Group, Inc. (b)		26,472		748,893
Kornit Digital Ltd. (b)		70,011		10,659,175
The Middleby Corp. (b)		18,888		3,716,403
Ranpak Holdings Corp. (b)		83,146		3,124,627
SPX FLOW, Inc.		32,230		2,787,250
Zurn Water Solutions Corp.		65,826		2,396,066
				47,188,250
Metal Fabricate & Hardware — 1.6%
Advanced Drainage Systems, Inc.		52,134		7,097,001
Helios Technologies, Inc.		43,674		4,593,195
Xometry, Inc. Class A (a) (b)		10,503		538,279
				12,228,475
Miscellaneous - Manufacturing — 1.5%
Enerpac Tool Group Corp.		86,586		1,755,964
Federal Signal Corp.		85,282		3,696,122
ITT, Inc.		40,546		4,143,396
John Bean Technologies Corp.		13,099		2,011,482
				11,606,964
Packaging & Containers — 0.3%
Graphic Packaging Holding Co.		136,589		2,663,485
Transportation — 1.7%
CryoPort, Inc. (a) (b)		48,117		2,847,083
Kirby Corp. (b)		32,871		1,953,195
Saia, Inc. (b)		25,178		8,485,741
				13,286,019
Trucking & Leasing — 0.3%
GATX Corp.		25,874		2,695,812
				153,297,610
Technology — 18.5%
Computers — 3.1%
CyberArk Software Ltd. (b)		25,650		4,444,632
Globant SA (b)		19,821		6,225,578
Rapid7, Inc. (b)		47,873		5,634,173
Varonis Systems, Inc. (b)		163,054		7,953,774
				24,258,157
Semiconductors — 7.4%
Ambarella, Inc. (b)		35,096		7,120,627
FormFactor, Inc. (b)		59,717		2,730,261
Impinj, Inc. (a) (b)		9,104		807,525

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

	Number of Shares		Value
Lattice Semiconductor Corp. (b)		116,134	$	8,949,286
MACOM Technology Solutions Holdings, Inc. (b)		67,231		5,264,187
MKS Instruments, Inc.		17,563		3,058,948
Nova Ltd. (b)		27,979		4,098,924
Power Integrations, Inc.		47,953		4,454,354
SiTime Corp. (b)		15,029		4,396,584
Synaptics, Inc. (b)		24,135		6,987,324
Tower Semiconductor Ltd. (b)		225,838		8,961,252
				56,829,272
Software — 8.0%
Avalara, Inc. (b)		11,220		1,448,614
Bandwidth, Inc. Class A (a) (b)		44,053		3,161,243
Cardlytics, Inc. (a) (b)		27,673		1,828,909
Cerence, Inc. (b)		11,062		847,792
Concentrix Corp.		17,827		3,184,259
Digital Turbine, Inc. (a) (b)		50,263		3,065,540
DigitalOcean Holdings, Inc. (b)		26,782		2,151,398
Health Catalyst, Inc. (b)		69,206		2,741,942
Jamf Holding Corp. (a) (b)		132,424		5,033,436
Manhattan Associates, Inc. (b)		60,000		9,329,400
Momentive Global, Inc. (b)		117,814		2,491,766
New Relic, Inc. (b)		53,148		5,844,154
Paymentus Holdings, Inc. Class A (b)		16,123		563,983
Phreesia, Inc. (b)		38,989		1,624,282
Porch Group, Inc. (Acquired 12/23/20, Cost $798,940) (b) (d) (e)		79,894		1,245,547
Porch Group, Inc. (b)		26,692		416,128
Sprout Social, Inc. Class A (b)		74,058		6,716,320
Verra Mobility Corp. (b)		201,333		3,106,568
Workiva, Inc. (b)		34,680		4,525,393
Ziff Davis, Inc. (b)		23,532		2,608,758
				61,935,432
				143,022,861
Utilities — 0.4%
Electric — 0.4%
Portland General Electric Co.		50,212		2,657,219
TOTAL COMMON STOCK (Cost $601,003,336)				768,556,142
TOTAL EQUITIES (Cost $601,003,336)				768,556,142
MUTUAL FUNDS — 1.7%
Diversified Financial Services — 1.7%
iShares Russell 2000 ETF (a)		18,817		4,185,842
iShares Russell 2000 Growth ETF		12,647		3,706,203

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

	Number of Shares		Value
State Street Navigator Securities Lending Government Money Market Portfolio (f)		4,923,245	$	4,923,245
TOTAL MUTUAL FUNDS (Cost $12,881,939)				12,815,290
TOTAL LONG-TERM INVESTMENTS (Cost $613,885,275)				781,371,432
	Principal Amount
SHORT-TERM INVESTMENTS — 1.8%
Repurchase Agreement — 1.8%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (g)	$	14,099,397		14,099,397
TOTAL SHORT-TERM INVESTMENTS (Cost $14,099,397)				14,099,397
TOTAL INVESTMENTS — 102.9% (Cost $627,984,672) (h)				795,470,829
Other Assets/(Liabilities) — (2.9)%				(22,267,387)
NET ASSETS — 100.0%			$	773,203,442

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) Denotes all or a portion of security on loan. The total value of securities on loan as of December 31, 2021, was $23,890,053 or 3.09% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $19,501,788 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 a Master Limited Partnership

(d) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At December 31, 2021, these securities amounted to a value of $1,245,547 or 0.16% of net assets.

(e) Restricted security. Certain securities are restricted as to resale. At December 31, 2021, these securities amounted to a value of $1,245,547 or 0.16% 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 $14,099,397. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $14,381,461.

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

MM MSCI EAFE International Index Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.2%
COMMON STOCK — 97.7%
Australia — 6.6%
Afterpay Ltd. (a)		2,413	$	144,430
Ampol Ltd.		2,684		57,935
APA Group (b)		13,088		95,889
Aristocrat Leisure Ltd.		6,606		209,512
ASX Ltd.		2,078		140,501
Aurizon Holdings Ltd.		21,848		55,485
AusNet Services Ltd.		22,416		41,905
Australia & New Zealand Banking Group Ltd.		31,694		634,534
BHP Group Ltd. (b)		32,649		988,121
BlueScope Steel Ltd.		5,211		79,606
Brambles Ltd.		16,087		124,440
Cochlear Ltd.		692		108,643
Coles Group Ltd.		14,785		193,019
Commonwealth Bank of Australia		19,674		1,446,082
Computershare Ltd.		6,056		88,147
Crown Resorts Ltd. (a) (b)		3,912		34,116
CSL Ltd.		5,299		1,122,140
Dexus		12,141		98,253
Domino's Pizza Enterprises Ltd.		703		60,384
Endeavour Group Ltd.		15,205		74,583
Evolution Mining Ltd.		20,954		62,004
Fortescue Metals Group Ltd.		18,928		265,601
Goodman Group		18,237		352,161
The GPT Group		21,615		85,257
IDP Education Ltd.		2,383		60,094
Insurance Australia Group Ltd.		28,277		87,654
Lendlease Corp Ltd.		7,587		59,029
Macquarie Group Ltd.		3,901		583,146
Magellan Financial Group Ltd. (b)		1,634		25,260
Medibank Pvt. Ltd.		30,129		73,451
Mirvac Group		43,859		92,994
National Australia Bank Ltd.		36,734		771,001
Newcrest Mining Ltd.		9,202		164,045
Northern Star Resources Ltd.		11,947		81,886
Orica Ltd.		4,653		46,408
Origin Energy Ltd.		18,713		71,493
Qantas Airways Ltd. (a)		9,166		33,426
QBE Insurance Group Ltd.		16,495		136,259
Ramsay Health Care Ltd.		2,040		105,902
REA Group Ltd.		575		70,156
Reece Ltd.		3,292		64,843
Rio Tinto Ltd.		4,155		303,576
Santos Ltd.		34,167		157,074
Scentre Group		58,781		135,189
SEEK Ltd.		3,498		83,458
Sonic Healthcare Ltd.		4,879		165,730
South32 Ltd.		52,530		153,975

MM MSCI EAFE International Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Stockland		26,198	$	80,851
Suncorp Group Ltd.		14,569		117,409
Sydney Airport (a)		14,103		89,112
Tabcorp Holdings Ltd.		25,053		91,638
Telstra Corp. Ltd.		44,794		136,251
Transurban Group		33,509		337,188
Treasury Wine Estates Ltd.		7,676		69,202
Vicinity Centres		40,053		49,342
Washington H Soul Pattinson & Co. Ltd. (b)		2,387		51,493
Wesfarmers Ltd.		12,530		540,664
Westpac Banking Corp.		40,982		637,157
WiseTech Global Ltd.		1,698		72,100
Woodside Petroleum Ltd.		10,821		172,840
Woolworths Group Ltd.		13,944		385,693
				12,919,737
Austria — 0.2%
Erste Group Bank AG		3,787		178,022
OMV AG		1,637		93,014
Raiffeisen Bank International AG		1,629		47,908
Verbund AG		753		84,986
voestalpine AG		1,272		46,370
				450,300
Belgium — 0.8%
Ageas SA		1,960		101,611
Anheuser-Busch InBev SA		8,420		509,775
Elia Group SA/NV		363		47,868
Etablissements Franz Colruyt NV		572		24,266
Groupe Bruxelles Lambert SA		1,194		133,435
KBC Group NV		2,794		239,976
Proximus SADP		1,822		35,529
Sofina SA		166		81,628
Solvay SA		848		98,862
UCB SA		1,385		158,272
Umicore SA		2,273		92,739
				1,523,961
Bermuda — 0.1%
CK Infrastructure Holdings Ltd.		8,000		50,942
Hongkong Land Holdings Ltd.		12,300		63,916
Jardine Matheson Holdings Ltd.		2,500		137,627
				252,485
Cayman Islands — 0.6%
Budweiser Brewing Co. APAC Ltd. (c)		19,625		51,473
Chow Tai Fook Jewellery Group Ltd.		22,600		40,651
CK Asset Holdings Ltd.		22,245		140,281
CK Hutchison Holdings Ltd.		30,245		195,172
ESR Cayman Ltd. (a) (c)		20,400		69,050
Futu Holdings Ltd. ADR (a) (b)		616		26,673
Melco Resorts & Entertainment Ltd. ADR (a)		2,260		23,007
Sands China Ltd. (a)		27,600		64,292
Sea Ltd. ADR (a)		1,515		338,921
SITC International Holdings Co. Ltd.		16,000		57,912
WH Group Ltd. (c)		97,072		60,890

MM MSCI EAFE International Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Wharf Real Estate Investment Co. Ltd.		19,000	$	96,515
Xinyi Glass Holdings Co. Ltd.		18,000		45,072
				1,209,909
Denmark — 2.7%
Ambu A/S Class B		1,881		49,233
AP Moller - Maersk A/S Class A		33		110,004
AP Moller - Maersk A/S Class B		65		233,281
Carlsberg A/S Class B		1,088		186,892
Chr Hansen Holding A/S		1,171		92,063
Coloplast A/S Class B		1,324		231,626
Danske Bank A/S		7,327		125,221
Demant A/S (a)		1,191		60,420
DSV A/S		2,264		523,135
Genmab A/S (a)		739		295,895
GN Store Nord A/S		1,387		86,667
Novo Nordisk A/S Class B		18,667		2,086,873
Novozymes A/S Class B		2,321		190,061
Orsted A/S (c)		2,132		273,780
Pandora A/S		1,093		136,036
ROCKWOOL International A/S Class B		100		43,768
Tryg A/S		3,970		98,124
Vestas Wind Systems A/S		11,042		333,918
				5,156,997
Finland — 1.2%
Elisa OYJ		1,572		96,546
Fortum OYJ		4,799		146,581
Kesko OYJ Class B		2,991		99,221
Kone OYJ Class B		3,806		270,647
Neste OYJ		4,729		233,188
Nokia OYJ (a)		60,326		378,974
Nordea Bank Abp		35,661		434,294
Orion OYJ Class B		1,077		44,692
Sampo OYJ Class A		5,605		279,632
Stora Enso OYJ Class R		6,640		120,751
UPM-Kymmene OYJ		5,843		220,827
Wartsila OYJ Abp		5,240		72,975
				2,398,328
France — 10.6%
Accor SA (a)		1,772		57,344
Aeroports de Paris (a) (b)		299		38,633
Air Liquide SA		5,238		913,383
Alstom SA (b)		3,470		123,584
Amundi SA (c)		671		55,390
Arkema SA		710		100,141
AXA SA		21,661		645,543
BioMerieux		470		66,809
BNP Paribas SA		12,449		860,152
Bollore SA		8,720		48,793
Bouygues SA		2,626		94,089
Bureau Veritas SA		3,315		110,033
Capgemini SE		1,776		433,788
Carrefour SA		6,934		127,089
Cie de Saint-Gobain		5,609		394,539

MM MSCI EAFE International Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Cie Generale des Etablissements Michelin SCA		1,901	$	311,609
CNP Assurances		1,968		48,738
Covivio		612		50,321
Credit Agricole SA		12,726		181,774
Danone SA		7,203		447,415
Dassault Aviation SA		231		24,960
Dassault Systemes SE		7,450		441,950
Edenred		2,709		125,027
Eiffage SA		907		93,553
Electricite de France SA		5,175		60,816
Engie SA		20,568		304,553
EssilorLuxottica SA		3,184		677,775
Eurazeo SE		441		38,552
Faurecia SE		1,004		47,762
Faurecia SE		249		11,626
Gecina SA		532		74,411
Getlink SE		4,856		80,559
Hermes International		353		616,399
Ipsen SA		415		37,949
Kering SA		836		670,801
Klepierre		2,030		48,137
L'Oreal SA		2,788		1,321,627
La Francaise des Jeux SAEM (c)		1,064		47,141
Legrand SA		3,016		352,976
LVMH Moet Hennessy Louis Vuitton SE		3,082		2,543,268
Orange SA		22,150		237,294
Orpea SA		516		51,606
Pernod Ricard SA		2,320		558,187
Publicis Groupe SA		2,482		167,104
Remy Cointreau SA		238		57,934
Renault SA (a)		2,161		75,045
Safran SA		3,781		464,378
Sanofi		12,601		1,266,068
Sartorius Stedim Biotech		312		170,873
Schneider Electric SE		5,996		1,175,510
SEB SA		308		47,973
Societe Generale SA		9,063		311,219
Sodexo SA		1,024		89,789
Suez SA		3,791		85,503
Teleperformance		654		291,582
Thales SA		1,220		103,825
TotalEnergies SE		27,840		1,414,015
Ubisoft Entertainment SA (a)		943		46,248
Unibail Rodamco Westfield (a)		9,567		33,217
Unibail Rodamco Westfield (a)		937		65,324
Valeo SE		2,551		77,107
Veolia Environnement SA		7,295		267,599
Vinci SA		5,916		626,823
Vivendi SE		7,769		105,106
Wendel SE		290		34,770
Worldline SA (a) (c)		2,543		141,708
				20,694,816
Germany — 8.1%
adidas AG		2,108		607,949
Allianz SE Registered		4,567		1,079,727
BASF SE		10,111		711,162
Bayer AG Registered		10,886		582,776

MM MSCI EAFE International Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Bayerische Motoren Werke AG		3,702	$	373,058
Bechtle AG		960		68,816
Beiersdorf AG		1,110		114,210
Brenntag SE		1,727		156,466
Carl Zeiss Meditec AG		458		96,375
Commerzbank AG (a)		11,272		85,899
Continental AG (a)		1,165		123,339
Covestro AG (c)		2,155		132,974
Daimler AG Registered		9,518		730,885
Daimler Truck Holding AG (a)		4,759		174,951
Delivery Hero SE (a) (c)		1,818		202,974
Deutsche Bank AG Registered (a)		22,462		281,934
Deutsche Boerse AG		2,087		349,614
Deutsche Lufthansa AG Registered (a)		6,544		46,051
Deutsche Post AG Registered		10,978		706,618
Deutsche Telekom AG Registered		37,005		687,743
E.ON SE		24,607		341,334
Evonik Industries AG		2,198		71,238
Fresenius Medical Care AG & Co. KGaA		2,231		144,523
Fresenius SE & Co. KGaA		4,653		187,606
GEA Group AG		1,673		91,606
Hannover Rueck SE		679		129,293
HeidelbergCement AG		1,630		110,435
HelloFresh SE (a)		1,868		143,688
Henkel AG & Co. KGaA		1,105		86,395
Infineon Technologies AG		14,403		667,853
KION Group AG		814		89,423
Knorr-Bremse AG		792		78,161
LANXESS AG		973		60,375
LEG Immobilien SE		815		113,848
Merck KGaA		1,423		367,893
MTU Aero Engines AG		593		120,566
Muenchener Rueckversicherungs-Gesellschaft AG in Muenchen Registered		1,544		458,051
Nemetschek SE		657		84,281
Puma SE		172		21,061
Puma SE		980		119,941
Rational AG		54		55,361
RWE AG		7,183		291,840
SAP SE		11,576		1,653,296
Scout24 SE (c)		975		68,350
Siemens AG Registered		8,481		1,474,190
Siemens Energy AG (a)		4,514		115,573
Siemens Healthineers AG (c)		3,128		234,392
Symrise AG		1,452		215,376
Telefonica Deutschland Holding AG		12,247		33,882
Uniper SE		876		41,663
United Internet AG Registered		1,173		46,530
Volkswagen AG		368		108,239
Vonovia SE		8,190		452,223
Zalando SE (a) (c)		2,407		195,188
				15,787,195
Hong Kong — 2.1%
AIA Group Ltd.		133,780		1,348,692
BOC Hong Kong Holdings Ltd.		40,500		132,734
CLP Holdings Ltd.		17,499		176,731
Galaxy Entertainment Group Ltd. (a)		25,000		129,543
Hang Lung Properties Ltd.		21,000		43,201

MM MSCI EAFE International Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Hang Seng Bank Ltd.		8,300	$	151,960
Henderson Land Development Co. Ltd.		15,325		65,274
HK Electric Investments & HK Electric Investments Ltd. Class SS		31,706		31,110
HKT Trust & HKT Ltd.		41,840		56,243
Hong Kong & China Gas Co. Ltd.		124,290		193,502
Hong Kong Exchanges & Clearing Ltd.		13,281		776,265
Link REIT		23,997		211,403
MTR Corp. Ltd.		16,528		88,712
New World Development Co. Ltd.		15,722		62,237
Power Assets Holdings Ltd.		15,500		96,611
Sino Land Co. Ltd.		32,986		41,091
Sun Hung Kai Properties Ltd.		14,758		179,153
Swire Pacific Ltd. Class A		6,000		34,141
Swire Properties Ltd.		12,196		30,566
Techtronic Industries Co. Ltd.		15,403		306,607
				4,155,776
Ireland — 0.8%
CRH PLC		8,695		459,273
DCC PLC		1,047		85,617
Flutter Entertainment PLC (a)		1,815		286,391
James Hardie Industries PLC		5,051		203,303
Kerry Group PLC Class A		1,776		228,940
Kingspan Group PLC		1,712		204,913
Smurfit Kappa Group PLC		2,653		146,663
				1,615,100
Israel — 0.7%
Azrieli Group Ltd.		461		43,953
Bank Hapoalim B.M.		12,177		125,394
Bank Leumi Le-Israel BM		16,272		174,846
Check Point Software Technologies Ltd. (a)		1,179		137,424
CyberArk Software Ltd. (a)		449		77,803
Elbit Systems Ltd.		301		52,127
Fiverr International Ltd. (a)		331		37,635
ICL Group Ltd.		7,997		76,827
Inmode Ltd. (a)		566		39,948
Israel Discount Bank Ltd. Class A		12,730		85,506
Kornit Digital Ltd. (a)		524		79,779
Mizrahi Tefahot Bank Ltd.		1,617		62,338
Nice Ltd. (a)		686		208,228
Teva Pharmaceutical Industries Ltd. Sponsored ADR (a)		12,434		99,596
Wix.com Ltd. (a)		632		99,723
				1,401,127
Italy — 1.8%
Amplifon SpA		1,317		70,769
Assicurazioni Generali SpA (b)		12,185		257,171
Atlantia SpA (a)		5,678		112,792
DiaSorin SpA		288		54,787
Enel SpA		90,422		720,118
Eni SpA		27,699		382,901
FinecoBank Banca Fineco SpA		6,746		117,483
Infrastrutture Wireless Italiane SpA (c)		3,597		43,551
Intesa Sanpaolo SpA		183,359		473,733
Mediobanca Banca di Credito Finanziario SpA		6,714		76,747

MM MSCI EAFE International Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Moncler SpA		2,309	$	166,884
Nexi SpA (a) (c)		5,297		83,718
Poste Italiane SpA (c)		5,760		75,588
Prysmian SpA		2,820		106,252
Recordati Industria Chimica e Farmaceutica SpA		1,234		79,045
Snam SpA		22,812		137,111
Telecom Italia SpA		101,113		49,723
Terna - Rete Elettrica Nazionale		14,635		118,080
UniCredit SpA		23,725		365,218
				3,491,671
Japan — 22.2%
Advantest Corp.		2,200		206,561
Aeon Co. Ltd.		7,200		169,577
AGC, Inc.		2,100		100,236
Aisin Corp.		1,800		69,017
Ajinomoto Co. Inc.		5,000		152,016
ANA Holdings, Inc. (a)		1,900		39,720
Asahi Group Holdings Ltd.		5,000		194,045
Asahi Intecc Co. Ltd.		2,500		53,558
Asahi Kasei Corp.		14,000		131,582
Astellas Pharma, Inc.		20,400		331,782
Azbil Corp.		1,500		68,340
Bandai Namco Holdings, Inc.		2,200		172,036
Benefit One, Inc.		900		38,616
Bridgestone Corp.		6,400		275,381
Brother Industries Ltd.		2,300		44,216
Canon, Inc. (b)		11,100		270,314
Capcom Co. Ltd.		1,900		44,734
Central Japan Railway Co.		1,600		213,458
The Chiba Bank Ltd.		6,200		35,470
Chubu Electric Power Co. Inc.		7,100		74,963
Chugai Pharmaceutical Co. Ltd.		7,500		243,254
Concordia Financial Group Ltd.		12,700		46,155
Cosmos Pharmaceutical Corp.		200		29,382
CyberAgent, Inc.		4,300		71,559
Dai Nippon Printing Co. Ltd.		2,400		60,366
Dai-ichi Life Holdings, Inc.		11,300		228,297
Daifuku Co. Ltd.		1,100		89,902
Daiichi Sankyo Co. Ltd.		19,600		498,399
Daikin Industries Ltd.		2,800		635,191
Daito Trust Construction Co. Ltd.		700		79,971
Daiwa House Industry Co. Ltd.		6,400		184,066
Daiwa House REIT Investment Corp.		23		69,683
Daiwa Securities Group, Inc.		16,400		92,497
Denso Corp.		4,800		396,355
Dentsu Group, Inc. (b)		2,300		81,989
Disco Corp.		300		91,687
East Japan Railway Co.		3,300		202,928
Eisai Co. Ltd.		2,700		153,310
ENEOS Holdings, Inc.		34,200		128,018
FANUC Corp.		2,100		445,170
Fast Retailing Co. Ltd.		600		340,704
Fuji Electric Co. Ltd.		1,500		81,907
FUJIFILM Holdings Corp.		3,900		289,102
Fujitsu Ltd.		2,200		376,943
GLP J-REIT		48		82,942
GMO Payment Gateway, Inc.		500		61,983

MM MSCI EAFE International Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Hakuhodo DY Holdings, Inc. (b)		2,900	$	48,312
Hamamatsu Photonics KK		1,600		102,107
Hankyu Hanshin Holdings, Inc.		2,400		68,128
Hikari Tsushin, Inc.		200		30,795
Hino Motors Ltd.		3,000		24,728
Hirose Electric Co. Ltd.		325		54,649
Hitachi Construction Machinery Co. Ltd.		1,300		37,584
Hitachi Ltd.		10,800		585,003
Hitachi Metals Ltd. (a)		2,600		48,157
Honda Motor Co. Ltd.		18,300		513,909
Hoshizaki Corp.		600		44,987
Hoya Corp.		4,100		607,926
Hulic Co. Ltd.		3,800		36,078
Ibiden Co. Ltd.		1,200		70,928
Idemitsu Kosan Co. Ltd.		2,171		55,450
Iida Group Holdings Co. Ltd.		1,800		41,761
Inpex Corp.		11,400		99,409
Isuzu Motors Ltd.		6,400		79,629
Ito En Ltd.		600		31,508
ITOCHU Corp.		13,300		406,805
Itochu Techno-Solutions Corp.		1,000		32,169
Japan Airlines Co. Ltd. (a)		1,800		34,367
Japan Exchange Group, Inc.		5,800		126,978
Japan Metropolitan Fund Invest		82		70,647
Japan Post Bank Co. Ltd.		4,300		39,440
Japan Post Holdings Co. Ltd.		26,800		209,176
Japan Post Insurance Co. Ltd.		1,900		30,529
Japan Real Estate Investment Corp.		14		79,478
Japan Tobacco, Inc. (b)		13,400		270,174
JFE Holdings, Inc.		5,400		68,878
JSR Corp.		2,200		83,683
Kajima Corp.		5,200		59,723
Kakaku.com, Inc.		1,300		34,701
The Kansai Electric Power Co., Inc.		7,700		72,065
Kansai Paint Co. Ltd.		1,900		41,297
Kao Corp.		5,200		272,108
KDDI Corp.		17,700		517,351
Keio Corp.		1,200		52,895
Keisei Electric Railway Co. Ltd.		1,200		32,448
Keyence Corp.		2,200		1,382,617
Kikkoman Corp.		1,600		134,522
Kintetsu Group Holdings Co. Ltd. (a)		2,000		55,912
Kirin Holdings Co. Ltd. (b)		9,200		147,543
Kobayashi Pharmaceutical Co. Ltd.		600		47,156
Kobe Bussan Co. Ltd.		1,600		61,902
Koei Tecmo Holdings Co. Ltd.		580		22,818
Koito Manufacturing Co. Ltd.		1,200		63,541
Komatsu Ltd.		9,500		222,481
Konami Holdings Corp.		1,000		47,994
Kose Corp.		400		45,384
Kubota Corp.		11,300		250,878
Kurita Water Industries Ltd.		1,200		56,736
Kyocera Corp.		3,500		218,706
Kyowa Kirin Co. Ltd.		2,900		79,046
Lasertec Corp.		800		243,198
Lawson, Inc.		600		28,393
Lion Corp.		2,700		36,078
LIXIL Group Corp.		3,000		79,945

MM MSCI EAFE International Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
M3, Inc.		4,800	$	241,772
Makita Corp.		2,400		101,894
Marubeni Corp.		17,600		171,312
Mazda Motor Corp. (a)		6,800		52,322
McDonald's Holdings Co. Japan Ltd.		1,000		44,250
Medipal Holdings Corp.		2,100		39,345
MEIJI Holdings Co. Ltd.		1,400		83,494
Mercari, Inc. (a)		1,200		61,139
MinebeaMitsumi, Inc.		4,000		113,559
MISUMI Group, Inc.		3,100		127,218
Mitsubishi Chemical Holding Corp.		14,200		105,190
Mitsubishi Corp.		14,200		450,869
Mitsubishi Electric Corp.		20,600		261,221
Mitsubishi Estate Co. Ltd.		13,100		181,601
Mitsubishi Gas Chemical Co., Inc.		1,900		32,181
Mitsubishi HC Capital, Inc.		8,100		40,071
Mitsubishi Heavy Industries Ltd.		3,600		83,327
Mitsubishi UFJ Financial Group, Inc.		135,500		736,164
Mitsui & Co. Ltd.		17,300		409,653
Mitsui Chemicals, Inc.		2,100		56,418
Mitsui Fudosan Co. Ltd.		10,300		204,036
Miura Co. Ltd.		900		30,988
Mizuho Financial Group, Inc.		27,000		343,419
MonotaRO Co. Ltd.		3,000		54,070
MS&AD Insurance Group Holdings, Inc.		4,900		151,192
Murata Manufacturing Co. Ltd.		6,300		500,186
NEC Corp.		2,800		129,266
Nexon Co. Ltd.		5,500		106,066
NGK Insulators Ltd.		2,600		43,947
Nidec Corp.		5,000		587,754
Nihon M&A Center Holdings, Inc.		3,400		83,126
Nintendo Co. Ltd.		1,200		559,725
Nippon Building Fund, Inc.		17		99,022
Nippon Express Co., Ltd. (a) (d)		900		54,064
Nippon Paint Holdings Co. Ltd.		8,000		87,225
Nippon Prologis REIT, Inc.		23		81,326
Nippon Sanso Holdings Corp.		1,800		39,329
Nippon Shinyaku Co. Ltd.		600		41,700
Nippon Steel Corp.		9,200		150,465
Nippon Telegraph & Telephone Corp.		14,500		396,458
Nippon Yusen KK		1,800		137,099
Nissan Chemical Corp.		1,400		81,314
Nissan Motor Co. Ltd. (a)		25,900		125,159
Nisshin Seifun Group, Inc.		2,400		34,540
Nissin Foods Holdings Co. Ltd.		700		50,988
Nitori Holdings Co. Ltd.		900		134,594
Nitto Denko Corp.		1,600		123,670
Nomura Holdings, Inc.		34,900		152,204
Nomura Real Estate Holdings, Inc.		1,600		36,822
Nomura Real Estate Master Fund, Inc.		49		68,923
Nomura Research Institute Ltd.		3,700		157,566
NTT Data Corp.		6,800		145,798
Obayashi Corp.		6,700		51,844
Obic Co. Ltd.		800		149,745
Odakyu Electric Railway Co. Ltd.		3,200		59,426
Oji Holdings Corp.		9,900		47,859
Olympus Corp.		12,000		275,630
Omron Corp.		2,100		209,249

MM MSCI EAFE International Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Ono Pharmaceutical Co. Ltd.		4,100	$	101,635
Open House Co. Ltd.		1,000		52,412
Oracle Corp.		400		30,369
Oriental Land Co. Ltd.		2,200		370,738
ORIX Corp.		13,500		275,535
Orix JREIT, Inc.		26		40,640
Osaka Gas Co. Ltd.		4,100		67,892
Otsuka Corp.		1,200		57,276
Otsuka Holdings Co. Ltd.		4,300		155,604
Pan Pacific International Holding Corp.		4,500		61,976
Panasonic Corp.		24,800		272,764
Persol Holdings Co. Ltd.		1,900		55,176
Pola Orbis Holdings, Inc. (b)		900		15,000
Rakuten Group, Inc. (a) (b)		10,000		100,330
Recruit Holdings Co. Ltd.		15,100		915,345
Renesas Electronics Corp. (a)		14,200		174,365
Resona Holdings, Inc.		23,500		91,409
Ricoh Co. Ltd.		7,600		70,768
Rinnai Corp.		400		35,980
Rohm Co. Ltd.		900		81,428
Ryohin Keikaku Co. Ltd.		3,100		47,275
Santen Pharmaceutical Co. Ltd.		3,700		45,144
SBI Holdings, Inc.		2,642		72,013
SCSK Corp.		1,800		35,823
Secom Co. Ltd.		2,400		166,634
Seiko Epson Corp.		2,800		50,418
Sekisui Chemical Co. Ltd.		4,200		70,185
Sekisui House Ltd.		6,800		145,970
Seven & i Holdings Co. Ltd.		8,200		360,447
SG Holdings Co. Ltd.		3,600		84,290
Sharp Corp.		2,600		29,793
Shimadzu Corp.		2,500		105,531
Shimano, Inc.		800		212,608
Shimizu Corp.		6,700		41,533
Shin-Etsu Chemical Co. Ltd.		3,900		675,460
Shionogi & Co. Ltd.		3,000		211,921
Shiseido Co. Ltd.		4,500		250,944
The Shizuoka Bank Ltd. (b)		5,500		39,307
SMC Corp.		600		404,776
Softbank Corp.		32,100		405,915
SoftBank Group Corp.		13,400		633,141
Sohgo Security Services Co. Ltd.		900		35,759
Sompo Holdings, Inc.		3,500		147,857
Sony Group Corp.		14,000		1,769,730
Square Enix Holdings Co. Ltd.		1,000		51,296
Stanley Electric Co. Ltd.		1,300		32,541
Subaru Corp.		6,700		119,824
SUMCO Corp.		3,700		74,914
Sumitomo Chemical Co. Ltd.		16,700		78,697
Sumitomo Corp.		12,600		186,286
Sumitomo Dainippon Pharma Co. Ltd.		2,300		26,496
Sumitomo Electric Industries Ltd.		8,200		106,908
Sumitomo Metal Mining Co. Ltd.		2,700		102,116
Sumitomo Mitsui Financial Group, Inc.		14,400		492,211
Sumitomo Mitsui Trust Holdings, Inc.		3,700		123,527
Sumitomo Realty & Development Co. Ltd.		3,300		97,062
Suntory Beverage & Food Ltd.		1,500		54,251
Suzuki Motor Corp.		4,000		154,033

MM MSCI EAFE International Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Sysmex Corp.		1,900	$	255,987
T&D Holdings, Inc.		6,000		76,789
Taisei Corp.		2,000		60,772
Taisho Pharmaceutical Holdings Co. Ltd.		400		18,397
Takeda Pharmaceutical Co. Ltd.		17,341		473,917
TDK Corp.		4,300		167,870
Terumo Corp.		7,200		304,240
TIS, Inc.		2,300		68,256
Tobu Railway Co. Ltd.		1,900		43,345
Toho Co. Ltd.		1,200		51,384
Tokio Marine Holdings, Inc.		6,900		383,455
Tokyo Century Corp.		500		24,259
Tokyo Electric Power Co. Holdings, Inc. (a)		16,600		42,961
Tokyo Electron Ltd.		1,700		973,174
Tokyo Gas Co. Ltd.		4,100		73,694
Tokyu Corp.		5,600		74,395
TOPPAN, INC.		3,100		58,110
Toray Industries, Inc.		15,600		92,475
Toshiba Corp.		4,400		180,941
Tosoh Corp.		2,800		41,532
TOTO Ltd.		1,700		78,193
Toyo Suisan Kaisha Ltd.		1,100		46,527
Toyota Industries Corp.		1,700		135,836
Toyota Motor Corp.		117,700		2,172,727
Toyota Tsusho Corp.		2,400		110,598
Trend Micro, Inc. (a)		1,500		82,976
Tsuruha Holdings, Inc.		400		38,352
Unicharm Corp.		4,400		191,226
USS Co. Ltd.		2,700		42,160
Welcia Holdings Co. Ltd.		900		28,055
West Japan Railway Co.		2,300		95,964
Yakult Honsha Co. Ltd.		1,500		78,138
Yamaha Corp.		1,400		69,017
Yamaha Motor Co. Ltd. (b)		3,200		76,762
Yamato Holdings Co. Ltd.		3,100		72,697
Yaskawa Electric Corp.		2,600		127,503
Yokogawa Electric Corp.		2,800		50,492
Z Holdings Corp.		29,700		172,348
ZOZO, Inc.		1,500		46,707
				43,218,495
Luxembourg — 0.3%
ArcelorMittal SA		7,586		244,007
Aroundtown SA		10,132		61,368
Eurofins Scientific SE		1,470		181,999
InPost SA (a)		2,436		29,426
Tenaris SA		5,299		55,304
				572,104
Netherlands — 6.2%
ABN AMRO Bank NV (c)		4,622		67,947
Adyen NV (a) (c)		218		570,337
Aegon NV		20,722		103,274
Airbus SE (a)		6,561		837,930
Akzo Nobel NV		2,027		223,131
Argenx SE (a)		512		180,960
ASM International NV		527		231,421

MM MSCI EAFE International Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
ASML Holding NV		4,584	$	3,655,156
CNH Industrial NV		11,292		216,871
Davide Campari-Milano NV		6,088		88,636
Euronext NV (c)		974		101,133
EXOR NV		1,237		110,106
Ferrari NV		16		4,115
Ferrari NV		1,419		367,266
Heineken Holding NV		1,294		119,469
Heineken NV		2,824		317,540
IMCD NV		608		134,981
ING Groep NV		43,404		604,814
JDE Peet's NV (b)		1,179		36,328
Just Eat Takeaway.com (a) (c)		2,076		111,983
Koninklijke Ahold Delhaize NV		11,469		392,983
Koninklijke DSM NV		1,928		432,890
Koninklijke KPN NV		38,018		118,057
Koninklijke Philips NV		10,116		376,006
NN Group NV		2,876		155,437
Prosus NV		10,360		864,161
QIAGEN NV (a)		2,568		143,095
Randstad NV		1,335		91,458
Stellantis NV		11,197		210,239
Stellantis NV (b)		11,145		209,080
STMicroelectronics NV		7,617		373,362
Universal Music Group NV (b)		8,199		231,167
Wolters Kluwer NV		2,945		346,142
				12,027,475
New Zealand — 0.3%
Auckland International Airport Ltd. (a)		14,720		77,677
Fisher & Paykel Healthcare Corp. Ltd.		6,462		144,911
Mercury NZ Ltd.		8,257		34,591
Meridian Energy Ltd.		13,498		44,907
Ryman Healthcare Ltd.		5,035		42,224
Spark New Zealand Ltd.		19,662		60,887
Xero Ltd. (a)		1,445		148,007
				553,204
Norway — 0.7%
Adevinta ASA (a)		2,933		38,980
Aker BP ASA		1,513		46,475
DNB Bank ASA		10,150		232,539
Equinor ASA		10,664		281,361
Gjensidige Forsikring ASA		2,172		52,755
Mowi ASA		4,615		109,222
Norsk Hydro ASA		15,174		119,517
Orkla ASA		8,630		86,528
Schibsted ASA Class A		860		33,229
Schibsted ASA Class B		1,026		34,356
Telenor ASA		7,927		124,732
Yara International ASA		1,864		94,166
				1,253,860
Portugal — 0.2%
Banco Espirito Santo SA (a) (d)		39,664		—
EDP - Energias de Portugal SA		31,373		172,092

MM MSCI EAFE International Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Galp Energia SGPS SA		5,427	$	52,625
Jeronimo Martins SGPS SA		3,225		73,808
				298,525
Singapore — 1.0%
Ascendas REIT		34,932		76,505
CapitaLand Integrated Commercial Trust		54,634		82,744
Capitaland Investment Ltd. (a)		28,646		72,489
City Developments Ltd.		4,900		24,781
DBS Group Holdings, Ltd.		20,222		489,600
Genting Singapore Ltd.		69,200		39,798
Keppel Corp. Ltd.		16,500		62,691
Mapletree Commercial Trust (a) (d)		22,600		33,641
Mapletree Logistics Trust		29,513		41,612
Oversea-Chinese Banking Corp. Ltd.		37,887		320,740
Singapore Airlines Ltd. (a) (b)		14,649		54,296
Singapore Exchange Ltd.		8,900		61,458
Singapore Technologies Engineering Ltd.		17,600		49,142
Singapore Telecommunications Ltd.		93,500		160,972
United Overseas Bank Ltd.		13,193		263,460
UOL Group Ltd.		4,769		25,107
Venture Corp. Ltd.		3,200		43,513
Wilmar International Ltd.		22,400		68,866
				1,971,415
Spain — 2.2%
ACS Actividades de Construccion y Servicios SA		2,877		77,166
Aena SME SA (a) (c)		857		135,369
Amadeus IT Group SA (a)		4,920		331,384
Banco Bilbao Vizcaya Argentaria SA		73,312		435,251
Banco Santander SA		193,165		644,733
CaixaBank SA		48,414		132,761
Cellnex Telecom SA (c)		5,597		324,962
EDP Renovaveis SA		3,338		82,774
Enagas SA		2,678		61,938
Endesa SA (b)		3,398		78,332
Ferrovial SA		5,402		169,419
Grifols SA		3,422		65,475
Iberdrola SA		63,074		739,131
Industria de Diseno Textil SA		12,131		393,146
Naturgy Energy Group SA (b)		2,264		73,500
Red Electrica Corp. SA		4,779		103,439
Repsol SA		15,679		186,102
Siemens Gamesa Renewable Energy SA (a)		2,805		66,528
Telefonica SA (b)		59,633		259,600
				4,361,010
Sweden — 3.7%
Alfa Laval AB		3,382		135,314
Assa Abloy AB Class B		11,042		335,433
Atlas Copco AB Class A		7,504		519,453
Atlas Copco AB Class B		4,262		248,769
Boliden AB		2,906		112,653
Electrolux AB (b)		2,492		60,245
Embracer Group AB (a) (b)		5,466		57,917
Epiroc AB Class A		7,407		187,790

MM MSCI EAFE International Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Epiroc AB Class B		4,369	$	92,652
EQT AB		3,196		173,717
Essity AB Class B		6,848		223,452
Evolution AB (c)		1,916		269,545
Fastighets AB Balder Class B (a)		1,148		82,810
Getinge AB Class B		2,601		112,976
Hennes & Mauritz AB Class B (b)		7,938		155,679
Hexagon AB Class B		21,553		339,321
Husqvarna AB Class B		4,846		77,156
Industrivarden AB Class A		1,465		46,499
Industrivarden AB Class C		1,855		58,019
Investment AB Latour		1,586		64,682
Investor AB		5,656		148,267
Investor AB Class B		20,182		504,719
Kinnevik AB Class B (a)		2,704		95,656
L E Lundbergforetagen AB Class B		776		43,360
Lifco AB		2,656		79,532
Lundin Energy AB		2,255		80,870
Nibe Industrier AB Class B		15,966		239,379
Sagax AB		1,845		62,277
Sandvik AB		12,686		354,445
Securitas AB Class B		3,012		41,399
Sinch AB (a) (c)		5,573		70,278
Skandinaviska Enskilda Banken AB Class A		18,302		253,547
Skanska AB Class B		3,813		98,214
SKF AB Class B		4,309		101,580
Svenska Cellulosa AB Class B		6,899		122,209
Svenska Handelsbanken AB Class A		16,027		173,015
Swedbank AB Class A		10,082		202,474
Swedish Match AB		16,920		134,437
Tele2 AB Class B		5,545		79,033
Telefonaktiebolaget LM Ericsson Class B		32,115		352,746
Telia Co AB		30,424		118,961
Volvo AB Class A		2,189		51,170
Volvo AB Class B		15,847		365,363
				7,127,013
Switzerland — 10.3%
ABB Ltd. Registered		18,285		696,682
Adecco Group AG Registered		1,794		91,720
Alcon, Inc.		5,517		486,075
Bachem Holding AG Registered Class B		70		54,836
Baloise Holding AG Registered		530		86,530
Barry Callebaut AG Registered		40		97,190
Chocoladefabriken Lindt & Spruengli AG		12		165,730
Chocoladefabriken Lindt & Spruengli AG Registered		1		134,052
Cie Financiere Richemont SA Registered		5,756		859,504
Clariant AG		2,515		52,488
Coca-Cola HBC AG		2,245		77,399
Credit Suisse Group AG Registered		28,962		280,910
EMS-Chemie Holding AG Registered		79		88,160
Geberit AG Registered		391		318,294
Givaudan SA Registered		102		536,714
Holcim Ltd.		4,338		220,844
Holcim Ltd.		1,513		76,999
Julius Baer Group Ltd.		2,501		167,131
Kuehne & Nagel International AG Registered		603		193,922
Logitech International SA Registered		1,945		162,791

MM MSCI EAFE International Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Lonza Group AG Registered		830	$	691,426
Nestle SA Registered		31,241		4,367,237
Novartis AG Registered		24,269		2,131,214
Partners Group Holding AG		252		415,426
Roche Holding AG		347		155,272
Roche Holding AG		7,794		3,230,889
Schindler Holding AG		451		121,004
Schindler Holding AG Registered		248		66,222
SGS SA Registered		65		216,516
Sika AG Registered (b)		1,572		652,530
Sonova Holding AG Registered		613		239,419
Straumann Holding AG Registered		115		243,000
The Swatch Group AG		326		99,314
The Swatch Group AG Registered		586		34,195
Swiss Life Holding AG Registered		356		217,890
Swiss Prime Site AG Registered		789		77,388
Swiss Re AG		3,297		325,648
Swisscom AG Registered		296		166,986
Temenos Group AG Registered		771		106,389
UBS Group AG Registered		39,134		702,381
VAT Group AG (c)		287		141,899
Vifor Pharma AG		556		99,553
Zurich Insurance Group AG		1,670		731,841
				20,081,610
United Kingdom — 14.3%
3i Group PLC		10,981		214,842
Abrdn PLC		23,789		77,535
Admiral Group PLC		2,127		90,936
Anglo American PLC		14,246		583,130
Antofagasta PLC		4,597		83,558
Ashtead Group PLC		4,929		394,997
Associated British Foods PLC		4,045		109,718
AstraZeneca PLC		17,160		1,999,571
Auto Trader Group PLC (c)		10,821		108,165
Aveva Group PLC		1,295		59,434
Aviva PLC		41,997		233,223
BAE Systems PLC		34,975		260,609
Barclays PLC		185,862		472,421
Barratt Developments PLC		11,648		117,666
Berkeley Group Holdings PLC		1,259		81,157
BHP Group PLC		23,453		698,958
BP PLC		222,675		990,618
British American Tobacco PLC		24,309		900,682
The British Land Co. PLC		9,913		71,080
BT Group PLC (b)		99,043		226,475
Bunzl PLC		3,767		146,895
Burberry Group PLC		4,618		113,157
Coca-Cola Europacific Partners PLC		2,270		126,961
Compass Group PLC (a)		19,712		439,110
Croda International PLC		1,511		207,234
Diageo PLC		25,910		1,412,430
Entain PLC (a)		6,631		150,556
Evraz PLC		5,623		45,898
Experian PLC		10,205		500,602
Ferguson PLC		2,443		433,977
GlaxoSmithKline PLC		55,715		1,211,473
Glencore PLC		110,227		560,798

MM MSCI EAFE International Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Halma PLC		4,278	$	184,760
Hargreaves Lansdown PLC		3,882		71,237
Hikma Pharmaceuticals PLC		1,994		59,805
HSBC Holdings PLC		226,384		1,369,872
Imperial Brands PLC		10,515		229,936
Informa PLC (a)		17,243		120,059
InterContinental Hotels Group PLC (a)		2,060		132,595
Intertek Group PLC		1,792		136,270
J Sainsbury PLC		19,850		74,010
JD Sports Fashion PLC		28,160		82,738
Johnson Matthey PLC		2,135		59,305
Kingfisher PLC		23,726		108,477
Land Securities Group PLC		8,036		84,281
Legal & General Group PLC		67,097		270,095
Lloyds Banking Group PLC		787,949		507,977
London Stock Exchange Group PLC		3,688		345,190
M&G PLC		29,236		78,924
Melrose Industries PLC		49,060		106,454
Mondi PLC		5,142		126,708
National Grid PLC		40,229		580,444
Natwest Group PLC		62,195		189,514
Next PLC		1,472		161,954
Ocado Group PLC (a)		5,571		126,399
Pearson PLC		8,248		68,296
Persimmon PLC		3,411		131,561
Phoenix Group Holdings PLC		7,282		64,230
Prudential PLC		28,913		498,577
Reckitt Benckiser Group PLC		7,943		681,410
RELX PLC		21,560		702,676
Rentokil Initial PLC		20,980		165,962
Rio Tinto PLC		12,370		815,569
Rolls-Royce Holdings PLC (a)		92,238		153,831
Royal Dutch Shell PLC Class A		45,383		995,791
Royal Dutch Shell PLC Class B		40,872		897,151
The Sage Group PLC		11,729		134,922
Schroders PLC		1,324		63,608
Segro PLC		13,310		258,550
Severn Trent PLC		2,684		107,190
Smith & Nephew PLC		9,619		168,365
Smiths Group PLC		4,419		94,199
Spirax-Sarco Engineering PLC		832		181,033
SSE PLC		11,702		260,943
St. James's Place PLC		5,728		130,483
Standard Chartered PLC		29,756		179,840
Taylor Wimpey PLC		41,210		97,609
Tesco PLC		84,655		331,902
Unilever PLC		28,778		1,541,764
United Utilities Group PLC		7,572		111,767
Vodafone Group PLC		305,997		456,388
Whitbread PLC (a)		2,277		91,972
WPP PLC		13,433		203,045
				27,919,504
TOTAL COMMON STOCK (Cost $149,573,795)				190,441,617

MM MSCI EAFE International Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
PREFERRED STOCK — 0.5%
Germany — 0.5%
Bayerische Motoren Werke AG 2.590%
		567	$	47,326
Fuchs Petrolub SE 2.460%
EUR		771		35,041
Henkel AG & Co. KGaA 2.130%
		2,030		164,396
Porsche Automobil Holding SE 2.350%
		1,713		162,562
Sartorius AG 0.130%
		283		191,547
Volkswagen AG 2.560%
		2,035		411,252
				1,012,124
TOTAL PREFERRED STOCK (Cost $815,887)				1,012,124
TOTAL EQUITIES (Cost $150,389,682)				191,453,741
MUTUAL FUNDS — 0.9%
United States — 0.9%
iShares Core MSCI EAFE ETF		4,050		302,292
State Street Navigator Securities Lending Government Money Market Portfolio (e)		1,400,773		1,400,773
TOTAL MUTUAL FUNDS (Cost $1,700,587)				1,703,065
TOTAL LONG-TERM INVESTMENTS (Cost $152,090,269)				193,156,806
	Principal Amount
SHORT-TERM INVESTMENTS — 0.9%
Repurchase Agreement — 0.9%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (f)	$	1,706,029		1,706,029
TOTAL SHORT-TERM INVESTMENTS (Cost $1,706,029)				1,706,029
TOTAL INVESTMENTS — 100.0% (Cost $153,796,298) (g)				194,862,835
Other Assets/(Liabilities) — 0.0%				47,756
NET ASSETS — 100.0%			$	194,910,591

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 December 31, 2021, was $4,196,410 or 2.15% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $3,008,733 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

(c) Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At December 31, 2021, the aggregate market value of these securities amounted to $3,637,785 or 1.87% of net assets.

(d) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At December 31, 2021, these securities amounted to a value of $87,705 or 0.04% of net assets.

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

(f) Maturity value of $1,706,029. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $1,740,199.

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

MM MSCI EAFE International Index Fund —  Portfolio of Investments (Continued)

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
Bank of Montreal	3/16/22	GBP	187,946	USD	$248,377	$	5,939
Bank of Montreal	3/16/22	SEK	804,954	USD	88,789		345
Bank of Montreal	3/16/22	DKK	164,266	USD	24,989		197
Bank of Montreal	3/16/22	EUR	104,693	USD	118,270		1,098
Bank of Montreal	3/16/22	USD	11,233	NOK	101,065		(228)
Bank of New York Mellon	3/16/22	HKD	167,890	USD	21,537		(3)
Bank of New York Mellon	3/16/22	EUR	70,000	USD	79,222		590
Bank of New York Mellon	3/16/22	JPY	7,890,000	USD	68,783		(153)
Bank of New York Mellon	3/16/22	USD	119,652	JPY	13,680,000		659
BNP Paribas SA	3/16/22	USD	1,946	SGD	2,658		(26)
BNP Paribas SA	3/16/22	USD	169,932	EUR	150,000		(1,094)
JP Morgan Chase Bank N.A.	3/16/22	CHF	16,884	USD	18,357		207
Morgan Stanley & Co. LLC	3/16/22	EUR	544,061	USD	615,606		4,717
Morgan Stanley & Co. LLC	3/16/22	GBP	50,624	USD	66,992		1,509
Morgan Stanley & Co. LLC	3/16/22	JPY	87,562,924	USD	772,416		(10,764)
Morgan Stanley & Co. LLC	3/16/22	AUD	191,300	USD	137,573		1,632
Morgan Stanley & Co. LLC	3/16/22	USD	38,684	ILS	119,805		125
Morgan Stanley & Co. LLC	3/16/22	USD	93,844	GBP	70,000		(876)
						$	3,874

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/ Net Unrealized Appreciation/ (Depreciation)
Long
Hang Seng Index	1/28/22		1	$	148,403	$	1,971
Topix Index	3/10/22		5		850,125		15,736
SPI 200 Index	3/17/22		4		528,922		5,609
Euro Stoxx 50 Index	3/18/22		34		1,622,180		37,468
FTSE 100 Index	3/18/22		7		684,518		9,420
						$	70,204

Currency Legend

AUD Australian Dollar

CHF Swiss Franc

DKK Danish Krone

EUR Euro

GBP British Pound

HKD Hong Kong Dollar

ILS Israeli Shekel

JPY Japanese Yen

NOK Norwegian Krone

SEK Swedish Krona

SGD Singapore Dollar

USD U.S. Dollar

MassMutual Overseas Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.7%
COMMON STOCK — 99.2%
Australia — 0.7%
Brambles Ltd.		208,200	$	1,610,516
Orica Ltd.		288,729		2,879,712
				4,490,228
Belgium — 1.2%
Anheuser-Busch InBev SA		73,000		4,419,664
KBC Group NV		38,700		3,323,928
				7,743,592
Brazil — 0.2%
Ambev SA ADR		400,441		1,121,235
Canada — 3.5%
Canadian National Railway Co.		68,404		8,404,115
Intact Financial Corp.		19,536		2,539,317
Open Text Corp.		49,800		2,363,723
Restaurant Brands International, Inc.		34,500		2,093,460
Suncor Energy, Inc.		96,163		2,406,071
The Toronto-Dominion Bank		61,925		4,747,608
				22,554,294
Cayman Islands — 2.0%
Alibaba Group Holding Ltd. (a)		305,940		4,580,520
NetEase, Inc.		98,300		2,015,436
Tencent Holdings Ltd.		66,900		3,924,570
Trip.com Group Ltd. (a)		19,499		478,925
Vipshop Holdings Ltd. ADR (a)		228,308		1,917,787
				12,917,238
Denmark — 2.1%
Carlsberg A/S Class B		18,275		3,139,201
Novo Nordisk A/S Class B		92,660		10,358,903
				13,498,104
Finland — 0.2%
UPM-Kymmene OYJ		43,600		1,647,792
France — 16.9%
Accor SA (a)		140,692		4,552,984
Air Liquide SA		64,941		11,324,176
BNP Paribas SA		108,931		7,526,484
Capgemini SE		50,427		12,316,805
Cie Generale des Etablissements Michelin SCA		19,149		3,138,871

MassMutual Overseas Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Danone SA		47,200	$	2,931,835
Dassault Systemes SE		55,448		3,289,296
Engie SA		319,152		4,725,715
EssilorLuxottica SA		27,688		5,893,920
L'Oreal SA		9,342		4,428,495
Legrand SA		39,373		4,608,002
LVMH Moet Hennessy Louis Vuitton SE		13,154		10,854,686
Pernod Ricard SA		32,565		7,835,062
Publicis Groupe SA		53,369		3,593,145
Schneider Electric SE		78,934		15,474,929
Valeo SE		116,830		3,531,318
Worldline SA (a) (b)		81,000		4,513,688
				110,539,411
Germany — 14.5%
Allianz SE Registered		31,430		7,430,661
Bayer AG Registered		245,140		13,123,440
Bayerische Motoren Werke AG		68,485		6,901,365
Beiersdorf AG		62,964		6,478,481
Continental AG (a)		60,380		6,392,450
Daimler AG Registered		73,573		5,649,658
Daimler Truck Holding AG (a)		48,936		1,798,993
Deutsche Boerse AG		49,161		8,235,452
Fresenius Medical Care AG & Co. KGaA		69,700		4,515,115
Fresenius SE & Co. KGaA		84,200		3,394,898
Henkel AG & Co. KGaA		33,000		2,580,132
Merck KGaA		31,910		8,249,795
MTU Aero Engines AG		10,778		2,191,341
SAP SE		90,021		12,856,890
thyssenkrupp AG (a)		353,517		3,894,266
Vitesco Technologies Group AG (a)		11,236		551,232
				94,244,169
Hong Kong — 1.3%
AIA Group Ltd.		836,800		8,436,132
India — 2.1%
Axis Bank Ltd. (a)		265,905		2,417,604
HDFC Bank Ltd.		99,578		1,976,136
Housing Development Finance Corp. Ltd.		104,653		3,625,940
Tata Consultancy Services Ltd.		113,487		5,710,607
				13,730,287
Indonesia — 0.2%
Bank Mandiri Persero Tbk PT		2,769,300		1,364,618
Ireland — 1.9%
Linde PLC (a)		15,784		5,498,393
Ryanair Holdings PLC (a)		11,700		203,620
Ryanair Holdings PLC Sponsored ADR (a)		63,980		6,547,073
				12,249,086
Israel — 0.7%
Check Point Software Technologies Ltd. (a)		37,278		4,345,124

MassMutual Overseas Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Italy — 2.2%
Eni SpA		184,937	$	2,556,502
Intesa Sanpaolo SpA		4,566,888		11,799,186
				14,355,688
Japan — 11.5%
Daikin Industries Ltd.		36,600		8,302,854
Denso Corp.		47,800		3,947,034
Hitachi Ltd.		151,800		8,222,549
Hoya Corp.		47,000		6,968,902
Japan Tobacco, Inc. (c)		127,800		2,576,734
Koito Manufacturing Co. Ltd.		58,400		3,092,340
Komatsu Ltd.		62,400		1,461,346
Kose Corp.		26,900		3,052,092
Kubota Corp.		277,600		6,163,164
Kyocera Corp.		70,900		4,430,362
Olympus Corp.		236,800		5,439,108
Shin-Etsu Chemical Co. Ltd.		15,100		2,615,243
SMC Corp.		6,800		4,587,458
Sony Group Corp.		51,600		6,522,720
Terumo Corp.		126,800		5,358,004
Toyota Motor Corp.		136,400		2,517,926
				75,257,836
Mexico — 0.4%
Grupo Televisa SAB Sponsored ADR		255,500		2,394,035
Netherlands — 5.9%
Akzo Nobel NV		54,711		6,022,563
CNH Industrial NV		293,597		5,638,742
EXOR NV		53,900		4,797,683
ING Groep NV		290,039		4,041,553
Koninklijke Philips NV		150,607		5,597,971
Prosus NV		54,423		4,539,600
QIAGEN NV (a)		68,883		3,838,317
Randstad NV		57,224		3,920,275
				38,396,704
Portugal — 0.3%
Galp Energia SGPS SA		218,706		2,120,777
Republic of Korea — 0.4%
NAVER Corp.		8,505		2,700,069
Singapore — 0.7%
DBS Group Holdings, Ltd.		198,900		4,815,617
South Africa — 0.3%
Naspers Ltd.		10,764		1,670,264
Spain — 1.0%
Amadeus IT Group SA (a)		99,688		6,714,439
Sweden — 1.6%
Hennes & Mauritz AB Class B (c)		214,794		4,212,514
SKF AB Class B		142,500		3,359,273

MassMutual Overseas Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Volvo AB Class B		123,800	$	2,854,290
				10,426,077
Switzerland — 13.2%
Cie Financiere Richemont SA Registered		52,085		7,777,496
Credit Suisse Group AG Registered		731,994		7,099,787
Holcim Ltd.		89,684		4,564,185
Julius Baer Group Ltd.		50,290		3,360,659
Nestle SA Registered		123,043		17,200,406
Novartis AG Registered		114,714		10,073,758
Roche Holding AG		38,556		15,982,825
Sika AG Registered (c)		11,577		4,805,562
The Swatch Group AG		5,805		1,768,467
UBS Group AG Registered		440,314		7,902,797
Zurich Insurance Group AG		12,595		5,519,487
				86,055,429
Taiwan — 1.0%
Taiwan Semiconductor Manufacturing Co. Ltd. Sponsored ADR Sponsored ADR		53,547		6,442,240
United Kingdom — 12.9%
Compass Group PLC (a)		395,166		8,802,824
Diageo PLC		140,194		7,642,384
Experian PLC		135,500		6,646,891
Glencore PLC		1,257,200		6,396,206
Informa PLC (a)		242,700		1,689,867
Liberty Global PLC Class A (a)		147,400		4,088,876
Lloyds Banking Group PLC		12,784,297		8,241,810
London Stock Exchange Group PLC		23,871		2,234,279
Natwest Group PLC		786,300		2,395,933
Prudential PLC		139,500		2,405,546
Reckitt Benckiser Group PLC		71,017		6,092,374
RELX PLC		230,300		7,505,860
Rio Tinto PLC		53,704		3,540,769
Rolls-Royce Holdings PLC (a)		2,038,726		3,400,115
Schroders PLC		70,168		3,371,046
Smiths Group PLC		147,473		3,143,641
Tesco PLC		1,117,287		4,380,477
WPP PLC		153,444		2,319,367
				84,298,265
United States — 0.3%
Yum China Holdings, Inc.		45,539		2,269,664
TOTAL COMMON STOCK (Cost $505,152,339)				646,798,414
PREFERRED STOCK — 0.5%
Germany — 0.0%
Henkel AG & Co. KGaA 2.130%
		1,900		153,868
Republic of Korea — 0.5%
Samsung Electronics Co. Ltd. 3.760%
		47,700		2,855,159

MassMutual Overseas Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
TOTAL PREFERRED STOCK (Cost $2,938,931)			$	3,009,027
TOTAL EQUITIES (Cost $508,091,270)				649,807,441
MUTUAL FUNDS — 1.2%
United States — 1.2%
State Street Navigator Securities Lending Government Money Market Portfolio (d)		7,702,956		7,702,956
TOTAL MUTUAL FUNDS (Cost $7,702,956)				7,702,956
TOTAL LONG-TERM INVESTMENTS (Cost $515,794,226)				657,510,397
	Principal Amount
SHORT-TERM INVESTMENTS — 1.5%
Repurchase Agreement — 1.5%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (e)	$	9,879,915		9,879,915
TOTAL SHORT-TERM INVESTMENTS (Cost $9,879,915)				9,879,915
TOTAL INVESTMENTS — 102.4% (Cost $525,674,141) (f)				667,390,312
Other Assets/(Liabilities) — (2.4)%				(15,359,410)
NET ASSETS — 100.0%			$	652,030,902

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 December 31, 2021, the aggregate market value of these securities amounted to $4,513,688 or 0.69% of net assets.

(c) Denotes all or a portion of security on loan. The total value of securities on loan as of December 31, 2021, was $11,366,131 or 1.74% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $4,285,248 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) Represents investment of security lending cash collateral. (Note 2).

(e) Maturity value of $9,879,915. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $10,077,566.

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

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
State Street Bank and Trust Co.	6/15/22	USD	3,159,833	CHF	2,902,000		(40,339)

Currency Legend

CHF Swiss Franc

USD U.S. Dollar

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 97.9%
COMMON STOCK — 97.3%
Australia — 2.2%
Australia & New Zealand Banking Group Ltd.		107,861	$	2,159,447
BHP Group Ltd. (a)		135,875		4,112,253
Challenger Ltd.		203,921		969,147
Downer EDI Ltd.		682,403		2,960,531
IGO Ltd.		589,944		4,946,732
Incitec Pivot Ltd.		946,620		2,238,384
Macquarie Group Ltd.		19,290		2,883,591
Rio Tinto Ltd.		13,511		987,152
Scentre Group		1,524,699		3,506,608
South32 Ltd.		2,352,090		6,894,395
Treasury Wine Estates Ltd.		259,381		2,338,416
Worley Ltd.		608,439		4,714,732
				38,711,388
Austria — 0.7%
BAWAG Group AG (b)		79,173		4,868,931
Erste Group Bank AG		161,710		7,601,769
				12,470,700
Belgium — 0.3%
KBC Group NV		40,581		3,485,487
Umicore SA		38,843		1,584,814
				5,070,301
Bermuda — 0.4%
China Resources Gas Group Ltd.		580,000		3,277,086
Hongkong Land Holdings Ltd.		312,200		1,622,331
Kunlun Energy Co. Ltd.		2,426,000		2,275,497
				7,174,914
Brazil — 0.8%
Ambev SA		672,900		1,895,551
B3 SA - Brasil Bolsa Balcao		755,000		1,508,771
Banco BTG Pactual SA		307,600		1,158,546
EDP - Energias do Brasil SA		484,151		1,820,353
Lojas Renner SA		111,603		488,620
Magazine Luiza SA		1,011,915		1,307,154
Raia Drogasil SA		373,841		1,630,288
Rede D'Or Sao Luiz SA (b)		271,815		2,184,942
Suzano SA (c)		240,627		2,593,045
				14,587,270

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

	Number of Shares		Value
British Virgin Islands — 0.0%
VK Co., Ltd. (c)		37,617	$	435,442
Canada — 3.5%
Canadian Pacific Railway Ltd.		69,483		4,998,607
Constellation Software, Inc.		973		1,805,267
Definity Financial Corp. (c)		84,970		1,983,607
Element Fleet Management Corp.		274,850		2,798,583
Franco-Nevada Corp.		17,132		2,369,321
Magna International, Inc. (a)		83,810		6,783,581
Manulife Financial Corp.		152,174		2,900,443
National Bank of Canada (a)		100,965		7,697,589
Shopify, Inc. Class A (c)		2,843		3,915,920
Sun Life Financial, Inc.		233,909		13,019,908
TC Energy Corp.		54,173		2,519,465
TELUS International CDA, Inc. (a) (c)		39,965		1,320,635
TMX Group Ltd.		54,263		5,501,585
Waste Connections, Inc.		34,169		4,656,210
				62,270,721
Cayman Islands — 4.9%
AAC Technologies Holdings, Inc.		204,000		803,695
Alibaba Group Holding Ltd. (c)		319,580		4,784,738
Alibaba Group Holding Ltd. Sponsored ADR (c)		94,818		11,263,430
Baidu, Inc. Sponsored ADR (c)		52,421		7,799,721
Budweiser Brewing Co. APAC Ltd. (b)		1,054,000		2,764,467
China Mengniu Dairy Co. Ltd.		359,000		2,035,068
CK Hutchison Holdings Ltd.		348,000		2,245,654
ENN Energy Holdings Ltd.		88,200		1,661,595
Greentown Service Group Co. Ltd.		508,000		469,523
I-Mab (c)		6,936		328,697
JD Health International, Inc. (b) (c)		143,450		1,132,500
JOYY, Inc. ADR		88,007		3,998,158
Kanzhun Ltd. (c)		13,311		464,288
KE Holdings, Inc. ADR (c)		53,587		1,078,170
Kingdee International Software Group Co. Ltd. (c)		182,000		561,112
Longfor Group Holdings Ltd. (b)		449,000		2,113,530
Meituan Class B (b) (c)		127,300		3,680,230
Pagseguro Digital Ltd. Class A (c)		20,937		548,968
Pinduoduo, Inc. ADR (c)		15,800		921,140
Sea Ltd. ADR (c)		4,239		948,307
Sino Biopharmaceutical Ltd.		1,374,000		962,782
StoneCo Ltd. Class A (c)		24,333		410,254
Sunny Optical Technology Group Co. Ltd.		22,900		724,298
Tencent Holdings Ltd.		329,300		19,317,802
Tongcheng Travel Holdings Ltd. (c)		1,350,400		2,500,944
Trip.com Group Ltd. ADR (c)		100,971		2,485,906
Weibo Corp. Sponsored ADR (a) (c)		74,239		2,299,924
Wuxi Biologics Cayman, Inc. (b) (c)		267,000		3,173,667
XP, Inc. Class A (c)		124,526		3,578,877
Zhongsheng Group Holdings Ltd.		278,000		2,169,561
				87,227,006
Chile — 0.1%
Banco de Chile		15,325,063		1,202,995

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

	Number of Shares		Value
Banco Santander Chile Sponsored ADR		92,606	$	1,508,552
				2,711,547
China — 3.5%
Beijing Capital International Airport Co. Ltd. Class H (c)		2,302,000		1,408,936
BTG Hotels Group Co. Ltd. Class A (c)		427,425		1,752,137
China Construction Bank Corp. Class H		4,022,000		2,786,768
Fuyao Glass Industry Group Co. Ltd.		195,600		1,447,243
Gree Electric Appliances, Inc. of Zhuhai Class A		1,113,100		6,453,133
Hisense Home Appliances Group Co. Ltd.		992,555		2,358,374
Hongfa Technology Co. Ltd.		128,600		1,505,750
Huayu Automotive Systems Co. Ltd.		1,586,900		7,037,064
Hundsun Technologies, Inc. Class A		248,800		2,424,068
Jiangsu Hengrui Medicine Co. Ltd. Class A		133,760		1,064,018
Kweichow Moutai Co. Ltd. Class A		13,498		4,341,188
Midea Group Co. Ltd. Class A		99,300		1,148,179
NARI Technology Co. Ltd.		946,399		5,942,678
PICC Property & Casualty Co. Ltd. Class H		2,028,000		1,657,761
Ping An Bank Co. Ltd. Class A		676,700		1,749,761
Ping An Insurance Group Co. of China Ltd. Class H		824,000		5,939,292
Ping An Insurance Group Co. of China Ltd. Class A		232,600		1,836,038
Sangfor Technologies, Inc.		30,000		898,123
Shandong Pharmaceutical Glass Co. Ltd.		261,500		1,801,036
Sinopharm Group Co. Ltd. Class H		350,800		763,480
Songcheng Performance Development Co. Ltd.		858,000		1,924,608
Tsingtao Brewery Co. Ltd. Class H		324,000		3,034,786
Yifeng Pharmacy Chain Co. Ltd. Class A		164,616		1,423,250
Zhejiang Runtu Co. Ltd.		711,453		1,070,019
				61,767,690
Cyprus — 0.0%
Ozon Holdings PLC (c)		18,310		542,159
Czech Republic — 0.1%
Komercni banka AS		25,868		1,106,036
Denmark — 0.1%
Chr Hansen Holding A/S		5,681		446,637
Genmab A/S (c)		4,568		1,829,021
				2,275,658
Finland — 0.7%
Kojamo OYJ		60,162		1,454,032
Sampo OYJ Class A		183,610		9,160,268
Stora Enso OYJ Class R		153,767		2,796,303
				13,410,603
France — 7.2%
Air Liquide SA		29,567		5,155,786
Alstom SA		110,949		3,951,446
AXA SA		488,673		14,563,468
BNP Paribas SA		141,401		9,769,968
Dassault Aviation SA		62,050		6,704,728
Engie SA		641,182		9,494,046
EssilorLuxottica SA		47,055		10,016,556
Ipsen SA		15,282		1,397,447

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

	Number of Shares		Value
Kering SA		5,335	$	4,280,769
L'Oreal SA		10,944		5,187,909
Legrand SA		21,854		2,557,674
LVMH Moet Hennessy Louis Vuitton SE		2,369		1,954,900
Safran SA		18,816		2,310,957
Sanofi		215,589		21,661,012
Teleperformance		5,804		2,587,682
Thales SA		140,551		11,961,283
TotalEnergies SE		272,079		13,819,099
Valeo SE		57,291		1,731,685
				129,106,415
Germany — 6.0%
BASF SE		77,288		5,436,086
Bayer AG Registered		156,702		8,388,959
Beiersdorf AG		31,201		3,210,328
Covestro AG (b)		80,022		4,937,749
Daimler AG Registered		49,449		3,797,180
Daimler Truck Holding AG (c)		24,631		905,489
Deutsche Boerse AG		29,873		5,004,325
Deutsche Telekom AG Registered		423,550		7,871,735
Evotec SE (c)		105,154		5,085,045
Fresenius SE & Co. KGaA		132,619		5,347,125
GEA Group AG		54,697		2,994,949
HeidelbergCement AG		27,363		1,853,884
KION Group AG		36,150		3,971,285
Knorr-Bremse AG		34,707		3,425,160
MorphoSys AG (c)		21,427		813,598
Muenchener Rueckversicherungs-Gesellschaft AG in Muenchen Registered		32,190		9,549,661
SAP SE		30,226		4,316,908
Siemens AG Registered		102,138		17,753,897
Siemens Healthineers AG (b)		56,199		4,211,188
Stroeer SE & Co KGaA		18,802		1,484,105
Teamviewer AG (b) (c)		73,298		983,689
Telefonica Deutschland Holding AG		484,906		1,341,515
Zalando SE (b) (c)		53,587		4,345,468
				107,029,328
Hong Kong — 1.6%
AIA Group Ltd.		1,388,200		13,995,027
Beijing Enterprises Holdings Ltd.		234,500		809,028
China Overseas Land & Investment Ltd.		1,074,500		2,543,975
Fosun International Ltd.		1,439,500		1,552,651
Galaxy Entertainment Group Ltd. (c)		1,064,000		5,513,373
Guangdong Investment Ltd.		2,372,000		3,014,799
Hong Kong Exchanges & Clearing Ltd.		5,300		309,781
				27,738,634
Hungary — 0.4%
OTP Bank Nyrt (c)		125,663		6,420,763
India — 3.9%
Ambuja Cements Ltd.		555,700		2,825,630
Ashok Leyland Ltd.		483,145		797,272
Axis Bank Ltd. (c)		448,778		4,080,283
HDFC Asset Management Co. Ltd. (b)		28,023		922,804

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

	Number of Shares		Value
HDFC Bank Ltd.		178,570	$	3,543,741
Hindalco Industries Ltd.		135,194		863,601
Housing Development Finance Corp. Ltd.		432,536		14,986,187
ICICI Bank Ltd.		322,911		3,201,487
ICICI Bank Ltd. Sponsored ADR		143,716		2,844,140
Indus Towers Ltd.		489,406		1,625,128
Infosys Ltd.		148,268		3,773,453
Kotak Mahindra Bank Ltd.		204,586		4,944,823
Maruti Suzuki India Ltd.		32,493		3,241,240
NTPC Ltd.		2,745,004		4,590,472
Petronet LNG Ltd.		1,086,876		3,164,874
Reliance Industries Ltd.		134,457		4,281,594
Shriram Transport Finance Co. Ltd.		243,890		3,956,189
Tata Consultancy Services Ltd.		15,413		775,574
Tech Mahindra Ltd.		156,637		3,768,628
Voltas Ltd.		82,484		1,353,965
				69,541,085
Indonesia — 0.7%
Bank Central Asia Tbk PT		12,334,200		6,250,518
Bank Rakyat Indonesia Persero Tbk PT		11,175,864		3,221,432
Sarana Menara Nusantara Tbk PT		38,612,800		3,047,305
				12,519,255
Ireland — 0.5%
Accenture PLC Class A		3,400		1,409,470
DCC PLC		26,017		2,127,509
Linde PLC (c)		15,349		5,346,860
				8,883,839
Italy — 1.3%
Banca Mediolanum SpA		347,216		3,403,628
DiaSorin SpA		13,573		2,582,041
Enel SpA		636,422		5,068,443
Intesa Sanpaolo SpA		626,570		1,618,830
Leonardo SpA (c)		258,031		1,841,225
Moncler SpA		42,242		3,053,068
Prysmian SpA		159,061		5,993,131
				23,560,366
Japan — 14.9%
Asahi Group Holdings Ltd.		84,100		3,263,829
Asahi Kasei Corp.		225,600		2,120,343
Asics Corp.		92,500		2,050,823
Astellas Pharma, Inc.		657,700		10,696,726
Benesse Holdings, Inc.		52,200		1,023,011
Bridgestone Corp.		57,500		2,474,127
Central Japan Railway Co.		13,600		1,814,396
Chugai Pharmaceutical Co. Ltd.		23,400		758,952
CyberAgent, Inc.		192,400		3,201,837
Dai-ichi Life Holdings, Inc.		134,900		2,725,418
Daiichi Sankyo Co. Ltd.		89,500		2,275,853
Daikin Industries Ltd.		4,200		952,787
Denso Corp.		30,700		2,535,019
DIC Corp.		72,900		1,838,914
Disco Corp.		5,900		1,803,186

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

	Number of Shares		Value
Electric Power Development Co. Ltd.		74,600	$	990,347
Fujitsu General Ltd.		127,800		3,034,524
Fujitsu Ltd.		35,400		6,065,352
Hamamatsu Photonics KK		39,100		2,495,249
Hikari Tsushin, Inc.		8,200		1,262,592
Hitachi Ltd.		118,800		6,435,038
Hitachi Metals Ltd. (c)		157,100		2,909,819
Honda Motor Co. Ltd.		37,400		1,050,284
Hoshizaki Corp.		29,100		2,181,870
JGC Holdings Corp.		125,000		1,044,418
Kansai Paint Co. Ltd.		60,600		1,317,161
Kirin Holdings Co. Ltd. (a)		231,400		3,711,028
MatsukiyoCocokara & Co.		78,800		2,910,225
Mitsubishi Corp.		69,000		2,190,841
Mitsubishi Electric Corp.		569,100		7,216,548
Mitsubishi Estate Co. Ltd.		151,600		2,101,583
Mitsubishi HC Capital, Inc.		204,800		1,013,156
Mitsubishi UFJ Financial Group, Inc.		1,124,300		6,108,262
Mitsui Fudosan Co. Ltd.		291,300		5,770,444
Murata Manufacturing Co. Ltd.		91,400		7,256,660
Nippon Shokubai Co. Ltd.		31,200		1,443,078
Nippon Steel Corp.		119,300		1,951,132
Nippon Telegraph & Telephone Corp.		826,100		22,587,195
NSK Ltd.		178,900		1,147,905
NTT Data Corp.		390,700		8,376,929
Omron Corp.		20,800		2,072,560
ORIX Corp.		207,700		4,239,154
Otsuka Holdings Co. Ltd.		312,300		11,301,193
Outsourcing, Inc. (a)		140,200		1,889,435
Pan Pacific International Holding Corp.		84,500		1,163,777
Panasonic Corp.		219,000		2,408,680
Persol Holdings Co. Ltd.		206,100		5,985,191
Pola Orbis Holdings, Inc.		27,200		453,346
Recruit Holdings Co. Ltd.		66,300		4,019,032
Renesas Electronics Corp. (c)		121,400		1,490,695
Seven & i Holdings Co. Ltd.		191,500		8,417,766
Shimadzu Corp.		50,600		2,135,955
Shiseido Co. Ltd.		12,900		719,374
SMC Corp.		1,900		1,281,790
SoftBank Group Corp.		30,300		1,431,655
Sompo Holdings, Inc.		78,000		3,295,093
Sony Group Corp.		74,200		9,379,570
Stanley Electric Co. Ltd.		222,000		5,557,039
Sumitomo Corp.		363,500		5,374,194
Sumitomo Mitsui Trust Holdings, Inc.		44,100		1,472,306
Sumitomo Rubber Industries Ltd.		65,700		669,474
Suzuki Motor Corp.		102,800		3,958,647
Taiheiyo Cement Corp.		74,900		1,481,296
Takeda Pharmaceutical Co. Ltd.		120,200		3,284,981
TechnoPro Holdings, Inc.		93,300		2,830,949
THK Co. Ltd.		41,000		988,575
Tokio Marine Holdings, Inc.		67,000		3,723,402
Tokyo Electron Ltd.		16,700		9,560,000
Tosoh Corp.		21,300		315,937
Toyota Motor Corp.		859,600		15,868,104
Welcia Holdings Co. Ltd.		36,400		1,134,665

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

	Number of Shares		Value
Z Holdings Corp.		1,155,300	$	6,704,169
				266,714,865
Luxembourg — 0.3%
Globant SA (c)		4,558		1,431,622
InPost SA (c)		33,000		398,624
Millicom International Cellular SA (c)		53,497		1,516,007
Samsonite International SA (b) (c)		468,600		952,077
Tenaris SA		184,626		1,926,901
				6,225,231
Malaysia — 0.2%
CIMB Group Holdings Bhd		2,699,063		3,531,042
Mexico — 0.7%
Gruma SAB de CV Class B		191,275		2,444,617
Grupo Aeroportuario del Pacifico SAB de CV ADR (a)		17,431		2,396,240
Grupo Aeroportuario del Sureste SAB de CV ADR		9,094		1,874,819
Grupo Financiero Banorte SAB de CV Class O		220,100		1,431,502
Grupo Mexico SAB de CV Series B		360,084		1,569,734
Orbia Advance Corp. SAB de CV		633,179		1,616,075
Wal-Mart de Mexico SAB de CV		451,700		1,681,452
				13,014,439
Netherlands — 7.2%
Adyen NV (b) (c)		441		1,153,754
AerCap Holdings NV (c)		47,891		3,133,029
Airbus SE (c)		47,672		6,088,373
Akzo Nobel NV		121,128		13,333,717
ASML Holding NV		35,419		28,242,143
Heineken NV (a)		13,853		1,557,679
ING Groep NV		1,072,685		14,947,345
Koninklijke DSM NV		12,176		2,733,853
Koninklijke Philips NV		280,974		10,443,634
NXP Semiconductor NV		52,705		12,005,145
Prosus NV		215,056		17,938,522
Prosus NV		82,953		6,819,757
Shop Apotheke Europe NV (b) (c)		7,595		979,344
Signify NV (b)		53,278		2,455,826
Stellantis NV		176,267		3,340,989
X5 Retail Group NV GDR		51,304		1,354,942
Yandex NV Class A (c)		20,900		1,264,450
				127,792,502
Norway — 0.7%
DNB Bank ASA		228,828		5,242,511
Equinor ASA		185,422		4,892,200
Storebrand ASA		319,219		3,202,796
				13,337,507
Philippines — 0.3%
Bank of the Philippine Islands		479,240		866,167
SM Investments Corp.		173,030		3,200,619

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

	Number of Shares		Value
Universal Robina Corp.		387,460	$	972,543
				5,039,329
Poland — 0.1%
Powszechny Zaklad Ubezpieczen SA		252,615		2,214,591
Portugal — 0.8%
Banco Comercial Portugues SA (c)		5,632,934		903,348
Galp Energia SGPS SA		758,984		7,359,816
Jeronimo Martins SGPS SA		233,694		5,348,362
				13,611,526
Republic of Korea — 3.9%
Amorepacific Corp.		19,021		2,651,995
Hyundai Motor Co.		12,901		2,266,757
KakaoBank Corp. (c)		1,754		86,824
Kangwon Land, Inc. (c)		37,519		756,857
KT Corp. Sponsored ADR (c)		178,169		2,239,584
KT Corp. (c)		50,108		1,288,127
LG Household & Health Care Ltd.		7,148		6,594,351
NAVER Corp.		43,848		13,920,357
Samsung Electronics Co. Ltd.		607,119		39,857,451
				69,662,303
Russia — 0.8%
LUKOIL PJSC Sponsored ADR		16,354		1,459,523
Moscow Exchange MICEX-RTS PJSC		734,670		1,496,890
Novatek PJSC Sponsored GDR Registered		7,779		1,816,027
Sberbank of Russia PJSC Sponsored ADR		544,173		8,709,818
				13,482,258
Saudi Arabia — 0.5%
Al Rajhi Bank		43,677		1,644,745
The Saudi British Bank		207,364		1,819,947
Saudi Tadawul Group Holding Co. (c)		21,865		732,638
The Saudi National Bank		316,482		5,422,856
				9,620,186
Singapore — 1.0%
DBS Group Holdings, Ltd.		79,300		1,919,952
Jardine Cycle & Carriage Ltd.		86,900		1,329,463
United Overseas Bank Ltd.		382,400		7,636,420
Wilmar International Ltd.		821,600		2,525,921
Yangzijiang Shipbuilding Holdings Ltd.		3,770,500		3,752,842
				17,164,598
South Africa — 0.6%
Capitec Bank Holdings Ltd.		30,222		3,868,342
Clicks Group Ltd.		53,561		1,059,734
FirstRand Ltd.		1,026,169		3,915,008
Naspers Ltd.		10,076		1,563,506
Shoprite Holdings Ltd.		89,462		1,172,027
				11,578,617

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

	Number of Shares		Value
Spain — 0.9%
Amadeus IT Group SA (c)		61,894	$	4,168,842
Banco Bilbao Vizcaya Argentaria SA		632,143		3,753,016
Fluidra SA		27,410		1,097,826
Iberdrola SA		457,971		5,366,720
Indra Sistemas SA (c)		126,414		1,360,214
				15,746,618
Sweden — 1.3%
Assa Abloy AB Class B		75,157		2,283,114
Elekta AB (a)		151,824		1,918,059
Essity AB Class B		59,061		1,927,179
Lundin Energy AB		48,566		1,741,692
Olink Holding AB (a) (c)		24,220		440,804
Svenska Handelsbanken AB Class A		245,480		2,650,018
Swedbank AB Class A		384,808		7,727,988
Telefonaktiebolaget LM Ericsson Class B		382,572		4,202,112
				22,890,966
Switzerland — 6.5%
ABB Ltd. Registered		125,751		4,791,275
Alcon, Inc.		66,809		5,886,204
Barry Callebaut AG Registered		1,734		4,213,177
Holcim Ltd.		42,889		2,182,701
Julius Baer Group Ltd.		144,798		9,676,211
Lonza Group AG Registered		8,813		7,341,612
Nestle SA Registered		197,101		27,553,110
Novartis AG Registered		164,147		14,414,781
PolyPeptide Group AG (b) (c)		7,677		1,153,385
Roche Holding AG		57,702		23,919,520
UBS Group AG Registered		260,569		4,676,717
Zurich Insurance Group AG		23,855		10,453,938
				116,262,631
Taiwan — 4.0%
Hon Hai Precision Industry Co. Ltd.		1,031,000		3,865,191
Largan Precision Co. Ltd.		11,000		979,712
MediaTek, Inc.		143,000		6,113,911
President Chain Store Corp.		182,000		1,797,384
Taiwan Semiconductor Manufacturing Co. Ltd.		2,592,000		57,394,024
Vanguard International Semiconductor Corp.		219,000		1,250,924
				71,401,146
Thailand — 0.6%
Airports of Thailand PCL (c)		272,300		497,240
Bangkok Dusit Medical Services PCL		2,908,600		2,002,628
CP ALL PCL		3,006,900		5,310,795
Land & Houses PCL		7,936,900		2,087,800
				9,898,463
Turkey — 0.0%
D-MARKET Elektronik Hizmetler ve Ticaret AS (c)		83,678		159,825

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

	Number of Shares		Value
United Arab Emirates — 0.2%
First Abu Dhabi Bank PJSC		583,150	$	2,990,782
United Kingdom — 11.7%
Amcor PLC		369,923		4,455,314
Antofagasta PLC		144,803		2,632,042
Ashtead Group PLC		52,750		4,227,250
ASOS PLC (c)		149,475		4,839,490
AstraZeneca PLC Sponsored ADR		404,498		23,562,009
Aviva PLC		371,905		2,065,305
BHP Group PLC		267,808		7,981,348
boohoo Group PLC (c)		1,245,623		2,071,516
Bridgepoint Group PLC (b) (c)		375,296		2,499,011
British American Tobacco PLC		71,931		2,665,143
Bunzl PLC		43,281		1,687,753
Burberry Group PLC		196,259		4,809,003
Close Brothers Group PLC		47,218		894,699
Compass Group PLC (c)		174,057		3,877,341
Deliveroo PLC Class A (b) (c)		325,010		918,212
Diageo PLC		80,536		4,390,252
Direct Line Insurance Group PLC		841,958		3,173,885
Dr. Martens Plc (c)		251,746		1,455,772
Fresnillo PLC		191,978		2,316,516
GlaxoSmithKline PLC Sponsored ADR		236,288		10,420,301
Great Portland Estates PLC		438,206		4,311,812
Hargreaves Lansdown PLC		47,358		869,053
HSBC Holdings PLC		349,281		2,113,534
Imperial Brands PLC		146,771		3,209,500
Informa PLC (c)		311,707		2,170,348
Investec PLC		263,335		1,431,087
Johnson Matthey PLC		82,277		2,285,460
Kingfisher PLC		919,966		4,206,154
Lloyds Banking Group PLC		10,166,338		6,554,058
London Stock Exchange Group PLC		73,980		6,924,382
Meggitt PLC (c)		339,552		3,392,921
Melrose Industries PLC		1,351,856		2,933,347
Mondi PLC		49,203		1,212,449
National Grid PLC		231,472		3,339,793
Network International Holdings PLC (b) (c)		727,327		2,865,593
Next PLC		58,667		6,454,712
Persimmon PLC		68,736		2,651,130
Playtech PLC (c)		83,052		823,264
Prudential PLC		77,135		1,330,120
Rolls-Royce Holdings PLC (c)		2,251,271		3,754,590
Royal Dutch Shell PLC Class B Sponsored ADR		44,840		1,943,814
Royal Dutch Shell PLC Class B		266,876		5,857,999
Smith & Nephew PLC		264,868		4,636,092
Smiths Group PLC		158,910		3,387,440
Standard Chartered PLC		157,178		949,959
Taylor Wimpey PLC		504,781		1,195,616
THG PLC (c)		312,694		970,416
Unilever PLC		264,463		14,168,448
Unilever PLC		89,624		4,799,416
Vodafone Group PLC		2,272,934		3,390,034
Vodafone Group PLC Sponsored ADR (a)		188,082		2,808,064
Whitbread PLC (c)		58,766		2,373,673
Wizz Air Holdings Plc (b) (c)		11,488		652,820

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

	Number of Shares		Value
WPP PLC		547,725	$	8,279,081
				209,188,341
United States — 1.2%
Autoliv, Inc.		19,377		2,005,983
Broadcom, Inc.		9,348		6,220,253
Canva, Inc. (Acquired 8/16/21-11/4/21, Cost $652,842) (c) (d) (e) (f)		383		652,694
Coupang, Inc. (c)		56,077		1,647,542
Ermenegildo Zegna N.V., PIPE Shares (Acquired 7/19/21, Cost $958,190) (c) (e) (f)		95,819		953,974
Mastercard, Inc. Class A		8,304		2,983,793
MercadoLibre, Inc. (c)		1,426		1,922,818
Yum China Holdings, Inc.		102,400		5,103,616
				21,490,673
TOTAL COMMON STOCK (Cost $1,497,609,911)				1,737,579,559
PREFERRED STOCK — 0.6%
Brazil — 0.2%
Banco Bradesco SA 3.340%
		485,820		1,675,849
Itau Unibanco Holding SA 0.550%
		596,250		2,267,749
				3,943,598
Germany — 0.2%
Sartorius AG 0.130%
		1,511		1,022,711
Volkswagen AG 2.560%
		19,710		3,983,182
				5,005,893
Italy — 0.1%
Telecom Italia SpA 6.110%
		2,132,106		1,009,275
Republic of Korea — 0.1%
Samsung Electronics Co. Ltd. 3.760%
		17,981		1,076,281
United States — 0.0%
Canva, Inc., Series A , (Acquired 11/04/21, Cost $39,209)
(c) (d) (e) (f)		23		39,196
TOTAL PREFERRED STOCK (Cost $10,631,253)				11,074,243
TOTAL EQUITIES (Cost $1,508,241,164)				1,748,653,802
MUTUAL FUNDS — 0.7%
United States — 0.7%
State Street Navigator Securities Lending Government Money Market Portfolio (g)		12,375,372		12,375,372

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

	Number of Shares		Value
TOTAL MUTUAL FUNDS (Cost $12,375,372)			$	12,375,372
RIGHTS — 0.0%
Russia — 0.0%
Moscow Exchange (c)		83,990		171,130
TOTAL RIGHTS (Cost $150,842)				171,130
TOTAL LONG-TERM INVESTMENTS (Cost $1,520,767,378)				1,761,200,304
SHORT-TERM INVESTMENTS — 2.1%
Mutual Fund — 2.0%
T. Rowe Price Government Reserve Investment Fund		34,889,042		34,889,042
	Principal Amount
Repurchase Agreement — 0.1%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/21, —%,due 1/03/22 (h)	$	1,469,293		1,469,293
TOTAL SHORT-TERM INVESTMENTS (Cost $36,358,335)				36,358,335
TOTAL INVESTMENTS — 100.7% (Cost $1,557,125,713) (i)				1,797,558,639
Other Assets/(Liabilities) — (0.7)%				(12,098,827)
NET ASSETS — 100.0%			$	1,785,459,812

Abbreviation Legend

ADR American Depositary Receipt

GDR Global Depositary Receipt

PIPE Private Investment in Public Equity

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 December 31, 2021, was $26,944,223 or 1.51% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $15,718,827 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 December 31, 2021, the aggregate market value of these securities amounted to $48,949,187 or 2.74% of net assets.

(c) Non-income producing security.

(d) Investment was valued using significant unobservable inputs.

(e) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At December 31, 2021, these securities amounted to a value of $1,645,864 or 0.09% of net assets.

(f) Restricted security. Certain securities are restricted as to resale. At December 31, 2021, these securities amounted to a value of $1,645,864 or 0.09% 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 $1,469,293. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $1,498,725.

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

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
State Street Bank and Trust	1/04/22	JPY	6,770,281	USD	$58,932	$	(76)
State Street Bank and Trust	1/05/22	JPY	8,641,556	USD	75,033		91
						$	15

Currency Legend

JPY Japanese Yen

USD U.S. Dollar

MassMutual 20/80 Allocation Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 22.0%
DFA Commodity Strategy Portfolio		467,392	$	2,210,764
Invesco Real Estate Fund, Class R6		24,386		586,483
MassMutual Blue Chip Growth Fund, Class I (a)		124,066		3,586,739
MassMutual Diversified Value Fund, Class I (a)		227,679		2,902,905
MassMutual Equity Opportunities Fund, Class I (a)		223,871		4,423,700
MassMutual Fundamental Value Fund, Class I (a)		345,730		3,464,216
MassMutual Growth Opportunities Fund, Class I (a)		167,019		1,394,610
MassMutual International Equity Fund, Class I (a)		85,878		786,644
MassMutual Mid Cap Growth Fund, Class I (a)		57,939		1,525,535
MassMutual Mid Cap Value Fund, Class I (a)		194,043		2,425,540
MassMutual Overseas Fund, Class I (a)		290,783		2,803,146
MassMutual Small Cap Growth Equity Fund, Class I (a)		16,127		272,377
MassMutual Small Cap Value Equity Fund, Class I (a)		86,479		942,617
MassMutual Strategic Emerging Markets Fund, Class I (a)		97,830		1,198,421
MM Equity Asset Fund, Class I (a)		1,258,415		11,501,917
Vanguard Developed Markets Index Fund, Admiral Shares		153,855		2,529,371
Vanguard Emerging Markets Stock Index Fund, Admiral Shares		11,692		479,354
Vanguard Mid-Cap Index Fund, Admiral Shares		4,715		1,487,433
Vanguard Small-Cap Index Fund, Admiral Shares		7,825		847,987
				45,369,759
Fixed Income Funds — 78.0%
Invesco International Bond Fund, Class R6		1,342,817		6,848,366
MassMutual Core Bond Fund, Class I (a)		3,163,057		34,445,686
MassMutual Global Floating Rate Fund, Class Y (a)		167,305		1,569,317
MassMutual High Yield Fund, Class I (a)		145,722		1,294,008
MassMutual Inflation-Protected and Income Fund, Class I (a)		571,898		6,239,410
MassMutual Short-Duration Bond Fund, Class I (a)		4,132,233		40,619,855
MassMutual Strategic Bond Fund, Class I (a)		2,454,445		25,182,607
MassMutual Total Return Bond Fund, Class I (a)		3,644,574		36,518,628
Vanguard Long-Term Treasury Index Fund, Admiral Shares		10,800		324,757
Vanguard Total Bond Market Index Fund, Institutional Shares		690,409		7,725,673
				160,768,307
TOTAL MUTUAL FUNDS (Cost $203,998,288)				206,138,066
TOTAL LONG-TERM INVESTMENTS (Cost $203,998,288)				206,138,066
TOTAL INVESTMENTS — 100.0% (Cost $203,998,288) (b)				206,138,066
Other Assets/(Liabilities) — (0.0)%				(30,148)
NET ASSETS — 100.0%			$	206,107,918

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 40/60 Allocation Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 41.9%
DFA Commodity Strategy Portfolio		391,006	$	1,849,459
Invesco Real Estate Fund, Class R6		44,856		1,078,782
MassMutual Blue Chip Growth Fund, Class I (a)		320,938		9,278,304
MassMutual Diversified Value Fund, Class I (a)		479,831		6,117,845
MassMutual Equity Opportunities Fund, Class I (a)		521,844		10,311,643
MassMutual Fundamental Value Fund, Class I (a)		758,132		7,596,480
MassMutual Growth Opportunities Fund, Class I (a)		354,167		2,957,292
MassMutual International Equity Fund, Class I (a)		219,502		2,010,639
MassMutual Mid Cap Growth Fund, Class I (a)		101,285		2,666,846
MassMutual Mid Cap Value Fund, Class I (a)		355,732		4,446,645
MassMutual Overseas Fund, Class I (a)		642,272		6,191,499
MassMutual Small Cap Growth Equity Fund, Class I (a)		38,568		651,421
MassMutual Small Cap Value Equity Fund, Class I (a)		229,478		2,501,305
MassMutual Strategic Emerging Markets Fund, Class I (a)		161,255		1,975,371
MM Equity Asset Fund, Class I (a)		2,984,943		27,282,377
Vanguard Developed Markets Index Fund, Institutional Shares		386,296		6,358,438
Vanguard Emerging Markets Stock Index Fund, Admiral Shares		24,235		993,615
Vanguard Mid-Cap Index Fund, Admiral Shares		10,471		3,303,029
Vanguard Small-Cap Index Fund, Admiral Shares		18,052		1,956,268
				99,527,258
Fixed Income Funds — 58.2%
Invesco International Bond Fund, Class R6		1,174,305		5,988,954
MassMutual Core Bond Fund, Class I (a)		2,590,889		28,214,783
MassMutual Global Floating Rate Fund, Class Y (a)		228,465		2,142,998
MassMutual High Yield Fund, Class I (a)		173,028		1,536,492
MassMutual Inflation-Protected and Income Fund, Class I (a)		380,247		4,148,495
MassMutual Short-Duration Bond Fund, Class I (a)		2,843,879		27,955,327
MassMutual Strategic Bond Fund, Class I (a)		2,389,187		24,513,054
MassMutual Total Return Bond Fund, Class I (a)		3,531,469		35,385,320
Vanguard Long-Term Treasury Index Fund, Admiral Shares		11,565		347,774
Vanguard Total Bond Market Index Fund, Institutional Shares		726,995		8,135,069
				138,368,266
TOTAL MUTUAL FUNDS (Cost $232,197,461)				237,895,524
TOTAL LONG-TERM INVESTMENTS (Cost $232,197,461)				237,895,524
TOTAL INVESTMENTS — 100.1% (Cost $232,197,461) (b)				237,895,524
Other Assets/(Liabilities) — (0.1)%				(157,284)
NET ASSETS — 100.0%			$	237,738,240

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 60/40 Allocation Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 63.2%
DFA Commodity Strategy Portfolio		324,668	$	1,535,680
Invesco Real Estate Fund, Class R6		52,988		1,274,362
MassMutual Blue Chip Growth Fund, Class I (a)		407,182		11,771,644
MassMutual Diversified Value Fund, Class I (a)		680,788		8,680,050
MassMutual Equity Opportunities Fund, Class I (a)		739,401		14,610,567
MassMutual Fundamental Value Fund, Class I (a)		1,020,978		10,230,204
MassMutual Growth Opportunities Fund, Class I (a)		442,613		3,695,820
MassMutual International Equity Fund, Class I (a)		335,612		3,074,210
MassMutual Mid Cap Growth Fund, Class I (a)		153,369		4,038,195
MassMutual Mid Cap Value Fund, Class I (a)		405,643		5,070,543
MassMutual Overseas Fund, Class I (a)		639,433		6,164,132
MassMutual Small Cap Growth Equity Fund, Class I (a)		76,819		1,297,475
MassMutual Small Cap Value Equity Fund, Class I (a)		383,700		4,182,331
MassMutual Strategic Emerging Markets Fund, Class I (a)		53,229		652,053
MM Equity Asset Fund, Class I (a)		4,994,738		45,651,904
Vanguard Developed Markets Index Fund, Institutional Shares		483,140		7,952,489
Vanguard Emerging Markets Stock Index Fund, Admiral Shares		41,252		1,691,328
Vanguard Mid-Cap Index Fund, Institutional Shares		71,655		4,993,643
Vanguard Small-Cap Index Fund, Admiral Shares		12,743		1,380,954
				137,947,584
Fixed Income Funds — 36.9%
Invesco International Bond Fund, Class R6		795,655		4,057,841
MassMutual Core Bond Fund, Class I (a)		1,527,994		16,639,859
MassMutual Global Floating Rate Fund, Class Y (a)		390,160		3,659,697
MassMutual High Yield Fund, Class I (a)		437,620		3,886,066
MassMutual Inflation-Protected and Income Fund, Class I (a)		175,431		1,913,955
MassMutual Short-Duration Bond Fund, Class I (a)		1,373,765		13,504,110
MassMutual Strategic Bond Fund, Class I (a)		1,016,773		10,432,088
MassMutual Total Return Bond Fund, Class I (a)		2,087,025		20,911,986
Vanguard Long-Term Treasury Index Fund, Admiral Shares		12,690		381,576
Vanguard Total Bond Market Index Fund, Institutional Shares		469,661		5,255,507
				80,642,685
TOTAL MUTUAL FUNDS (Cost $207,165,547)				218,590,269
TOTAL LONG-TERM INVESTMENTS (Cost $207,165,547)				218,590,269
TOTAL INVESTMENTS — 100.1% (Cost $207,165,547) (b)				218,590,269
Other Assets/(Liabilities) — (0.1)%				(130,540)
NET ASSETS — 100.0%			$	218,459,729

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 80/20 Allocation Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 77.7%
DFA Commodity Strategy Portfolio		194,283	$	918,958
Invesco Real Estate Fund, Class R6		55,309		1,330,187
MassMutual Blue Chip Growth Fund, Class I (a)		357,655		10,339,795
MassMutual Diversified Value Fund, Class I (a)		482,338		6,149,814
MassMutual Equity Opportunities Fund, Class I (a)		502,627		9,931,917
MassMutual Fundamental Value Fund, Class I (a)		780,060		7,816,202
MassMutual Growth Opportunities Fund, Class I (a)		361,531		3,018,785
MassMutual International Equity Fund, Class I (a)		223,898		2,050,902
MassMutual Mid Cap Growth Fund, Class I (a)		163,558		4,306,474
MassMutual Mid Cap Value Fund, Class I (a)		348,411		4,355,143
MassMutual Overseas Fund, Class I (a)		769,343		7,416,469
MassMutual Small Cap Growth Equity Fund, Class I (a)		80,298		1,356,237
MassMutual Small Cap Value Equity Fund, Class I (a)		307,087		3,347,245
MassMutual Strategic Emerging Markets Fund, Class I (a)		255,864		3,134,332
MM Equity Asset Fund, Class I (a)		3,845,594		35,148,732
Vanguard Developed Markets Index Fund, Institutional Shares		486,755		8,011,981
Vanguard Emerging Markets Stock Index Fund, Admiral Shares		45,799		1,877,759
Vanguard Mid-Cap Index Fund, Admiral Shares		17,282		5,451,802
Vanguard Small-Cap Index Fund, Admiral Shares		25,175		2,728,220
				118,690,954
Fixed Income Funds — 22.4%
Invesco International Bond Fund, Class R6		539,650		2,752,216
MassMutual Core Bond Fund, Class I (a)		468,373		5,100,587
MassMutual Global Floating Rate Fund, Class Y (a)		313,215		2,937,961
MassMutual High Yield Fund, Class I (a)		373,581		3,317,396
MassMutual Inflation-Protected and Income Fund, Class I (a)		53,414		582,750
MassMutual Short-Duration Bond Fund, Class I (a)		636,336		6,255,187
MassMutual Strategic Bond Fund, Class I (a)		360,314		3,696,822
MassMutual Total Return Bond Fund, Class I (a)		827,830		8,294,858
Vanguard Long-Term Treasury Index Fund, Admiral Shares		6,073		182,626
Vanguard Total Bond Market Index Fund, Admiral Shares		97,385		1,089,743
				34,210,146
TOTAL MUTUAL FUNDS (Cost $142,669,191)				152,901,100
TOTAL LONG-TERM INVESTMENTS (Cost $142,669,191)				152,901,100
TOTAL INVESTMENTS — 100.1% (Cost $142,669,191) (b)				152,901,100
Other Assets/(Liabilities) — (0.1)%				(82,745)
NET ASSETS — 100.0%			$	152,818,355

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 36.3%
JPMorgan International Research Enhanced Equity Fund, Class R6		151,530	$	3,116,962
JPMorgan Realty Income Fund, Class R6		68,151		1,168,105
MassMutual Blue Chip Growth Fund, Class I (a)		59,926		1,732,464
MassMutual Diversified Value Fund, Class I (a)		159,079		2,028,259
MassMutual Equity Opportunities Fund, Class I (a)		153,521		3,033,567
MassMutual Fundamental Value Fund, Class I (a)		182,485		1,828,496
MassMutual Growth Opportunities Fund, Class I (a)		59,169		494,058
MassMutual International Equity Fund, Class I (a)		206,582		1,892,293
MassMutual Mid Cap Growth Fund, Class I (a)		28,356		746,609
MassMutual Mid Cap Value Fund, Class I (a)		62,869		785,859
MassMutual Overseas Fund, Class I (a)		510,866		4,924,753
MassMutual Small Cap Growth Equity Fund, Class I (a)		34,027		574,723
MassMutual Small Cap Value Equity Fund, Class I (a)		74,160		808,343
MassMutual Strategic Emerging Markets Fund, Class I (a)		175,305		2,147,489
MM Equity Asset Fund, Class I (a)		1,006,290		9,197,487
Vanguard Developed Markets Index Fund, Admiral Shares		157,120		2,583,054
Vanguard Emerging Markets Stock Index Fund, Admiral Shares		30,807		1,263,072
Vanguard Mid-Cap Index Fund, Admiral Shares		2,136		673,764
Vanguard Real Estate Index Fund, Admiral Shares		7,334		1,204,674
Vanguard Small-Cap Index Fund, Admiral Shares		5,588		605,551
				40,809,582
Fixed Income Funds — 63.8%
JPMorgan Emerging Markets Debt Fund, Class R6		272,165		2,095,668
JPMorgan Emerging Markets Strategic Debt Fund, Class R6		274,065		2,104,818
JPMorgan U.S. Government Money Market Fund, Class IM		5,634,499		5,634,499
MassMutual Core Bond Fund, Class I (a)		1,925,346		20,967,021
MassMutual Global Floating Rate Fund, Class Y (a)		155,359		1,457,269
MassMutual High Yield Fund, Class I (a)		1,282,020		11,384,341
MassMutual Inflation-Protected and Income Fund, Class I (a)		774,908		8,454,242
MassMutual Strategic Bond Fund, Class I (a)		687,829		7,057,123
MassMutual Total Return Bond Fund, Class I (a)		705,156		7,065,664
Vanguard Total Bond Market Index Fund, Institutional Shares		487,293		5,452,811
				71,673,456
TOTAL MUTUAL FUNDS (Cost $110,298,352)				112,483,038
TOTAL LONG-TERM INVESTMENTS (Cost $110,298,352)				112,483,038

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

	Number of Shares	Value
TOTAL INVESTMENTS — 100.1% (Cost $110,298,352) (b)		$	112,483,038
Other Assets/(Liabilities) — (0.1)%			(131,678)
NET ASSETS — 100.0%		$	112,351,360

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 RetireSMART^sm by JPMorgan 2020 Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 36.3%
JPMorgan International Research Enhanced Equity Fund, Class R6		329,139	$	6,770,383
JPMorgan Realty Income Fund, Class R6		147,686		2,531,341
MassMutual Blue Chip Growth Fund, Class I (a)		130,282		3,766,442
MassMutual Diversified Value Fund, Class I (a)		344,631		4,394,049
MassMutual Equity Opportunities Fund, Class I (a)		334,179		6,603,380
MassMutual Fundamental Value Fund, Class I (a)		396,637		3,974,304
MassMutual Growth Opportunities Fund, Class I (a)		128,177		1,070,274
MassMutual International Equity Fund, Class I (a)		447,260		4,096,897
MassMutual Mid Cap Growth Fund, Class I (a)		61,423		1,617,274
MassMutual Mid Cap Value Fund, Class I (a)		136,197		1,702,466
MassMutual Overseas Fund, Class I (a)		1,109,686		10,697,377
MassMutual Small Cap Growth Equity Fund, Class I (a)		73,714		1,245,037
MassMutual Small Cap Value Equity Fund, Class I (a)		160,659		1,751,185
MassMutual Strategic Emerging Markets Fund, Class I (a)		379,346		4,646,989
MM Equity Asset Fund, Class I (a)		2,187,270		19,991,651
Vanguard Developed Markets Index Fund, Institutional Shares		342,546		5,638,309
Vanguard Emerging Markets Stock Index Fund, Admiral Shares		67,271		2,758,123
Vanguard Mid-Cap Index Fund, Admiral Shares		4,663		1,471,121
Vanguard Real Estate Index Fund, Admiral Shares		16,021		2,631,824
Vanguard Small-Cap Index Fund, Admiral Shares		12,200		1,322,151
				88,680,577
Fixed Income Funds — 63.8%
JPMorgan Emerging Markets Debt Fund, Class R6		589,399		4,538,373
JPMorgan Emerging Markets Strategic Debt Fund, Class R6		592,704		4,551,963
JPMorgan U.S. Government Money Market Fund, Class IM		12,201,154		12,201,154
MassMutual Core Bond Fund, Class I (a)		4,184,142		45,565,311
MassMutual Global Floating Rate Fund, Class Y (a)		339,373		3,183,317
MassMutual High Yield Fund, Class I (a)		2,789,756		24,773,032
MassMutual Inflation-Protected and Income Fund, Class I (a)		1,678,129		18,308,386
MassMutual Strategic Bond Fund, Class I (a)		1,494,786		15,336,507
MassMutual Total Return Bond Fund, Class I (a)		1,532,411		15,354,762
Vanguard Total Bond Market Index Fund, Institutional Shares		1,064,526		11,912,051
				155,724,856
TOTAL MUTUAL FUNDS (Cost $238,440,706)				244,405,433
TOTAL LONG-TERM INVESTMENTS (Cost $238,440,706)				244,405,433

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

	Number of Shares	Value
TOTAL INVESTMENTS — 100.1% (Cost $238,440,706) (b)		$	244,405,433
Other Assets/(Liabilities) — (0.1)%			(197,207)
NET ASSETS — 100.0%		$	244,208,226

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 RetireSMART^sm by JPMorgan 2025 Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 52.3%
JPMorgan International Research Enhanced Equity Fund, Class R6		380,998	$	7,837,132
JPMorgan Realty Income Fund, Class R6		179,360		3,074,225
MassMutual Blue Chip Growth Fund, Class I (a)		151,944		4,392,700
MassMutual Diversified Value Fund, Class I (a)		404,138		5,152,757
MassMutual Equity Opportunities Fund, Class I (a)		390,529		7,716,850
MassMutual Fundamental Value Fund, Class I (a)		462,977		4,639,029
MassMutual Growth Opportunities Fund, Class I (a)		149,384		1,247,355
MassMutual International Equity Fund, Class I (a)		519,907		4,762,347
MassMutual Mid Cap Growth Fund, Class I (a)		74,457		1,960,458
MassMutual Mid Cap Value Fund, Class I (a)		164,693		2,058,657
MassMutual Overseas Fund, Class I (a)		1,291,169		12,446,870
MassMutual Small Cap Growth Equity Fund, Class I (a)		81,334		1,373,725
MassMutual Small Cap Value Equity Fund, Class I (a)		176,706		1,926,096
MassMutual Strategic Emerging Markets Fund, Class I (a)		462,693		5,667,992
MM Equity Asset Fund, Class I (a)		2,556,478		23,366,213
Vanguard Developed Markets Index Fund, Institutional Shares		399,227		6,571,275
Vanguard Emerging Markets Stock Index Fund, Admiral Shares		82,069		3,364,811
Vanguard Mid-Cap Index Fund, Admiral Shares		5,657		1,784,509
Vanguard Real Estate Index Fund, Admiral Shares		19,472		3,198,712
Vanguard Small-Cap Index Fund, Admiral Shares		13,504		1,463,441
				104,005,154
Fixed Income Funds — 47.8%
JPMorgan Emerging Markets Debt Fund, Class R6		409,735		3,154,960
JPMorgan Emerging Markets Strategic Debt Fund, Class R6		413,213		3,173,475
MassMutual Core Bond Fund, Class I (a)		3,119,913		33,975,857
MassMutual Global Floating Rate Fund, Class Y (a)		222,094		2,083,242
MassMutual High Yield Fund, Class I (a)		1,681,751		14,933,945
MassMutual Inflation-Protected and Income Fund, Class I (a)		548,095		5,979,717
MassMutual Strategic Bond Fund, Class I (a)		1,115,209		11,442,045
MassMutual Total Return Bond Fund, Class I (a)		1,143,308		11,455,949
Vanguard Total Bond Market Index Fund, Institutional Shares		794,216		8,887,281
				95,086,471
TOTAL MUTUAL FUNDS (Cost $192,027,401)				199,091,625
TOTAL LONG-TERM INVESTMENTS (Cost $192,027,401)				199,091,625

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

	Number of Shares	Value
TOTAL INVESTMENTS — 100.1% (Cost $192,027,401) (b)		$	199,091,625
Other Assets/(Liabilities) — (0.1)%			(135,370)
NET ASSETS — 100.0%		$	198,956,255

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 RetireSMART^sm by JPMorgan 2030 Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 64.8%
JPMorgan International Research Enhanced Equity Fund, Class R6		842,947	$	17,339,416
JPMorgan Realty Income Fund, Class R6		492,927		8,448,763
MassMutual Blue Chip Growth Fund, Class I (a)		413,614		11,957,583
MassMutual Diversified Value Fund, Class I (a)		1,093,482		13,941,897
MassMutual Equity Opportunities Fund, Class I (a)		1,053,235		20,811,921
MassMutual Fundamental Value Fund, Class I (a)		1,259,198		12,617,166
MassMutual Growth Opportunities Fund, Class I (a)		404,655		3,378,871
MassMutual International Equity Fund, Class I (a)		1,411,194		12,926,536
MassMutual Mid Cap Growth Fund, Class I (a)		203,981		5,370,831
MassMutual Mid Cap Value Fund, Class I (a)		452,099		5,651,237
MassMutual Overseas Fund, Class I (a)		3,941,956		38,000,452
MassMutual Small Cap Growth Equity Fund, Class I (a)		213,575		3,607,278
MassMutual Small Cap Value Equity Fund, Class I (a)		465,592		5,074,949
MassMutual Strategic Emerging Markets Fund, Class I (a)		1,285,893		15,752,189
MM Equity Asset Fund, Class I (a)		6,942,022		63,450,077
Vanguard Developed Markets Index Fund, Institutional Shares		1,035,331		17,041,542
Vanguard Emerging Markets Stock Index Fund, Institutional Shares		285,381		8,898,183
Vanguard Mid-Cap Index Fund, Admiral Shares		14,927		4,708,799
Vanguard Real Estate Index Fund, Institutional Shares		332,959		8,467,142
Vanguard Small-Cap Index Fund, Admiral Shares		34,069		3,692,027
				281,136,859
Fixed Income Funds — 35.3%
JPMorgan Emerging Markets Debt Fund, Class R6		785,560		6,048,810
JPMorgan Emerging Markets Strategic Debt Fund, Class R6		789,962		6,066,908
MassMutual Core Bond Fund, Class I (a)		5,402,278		58,830,811
MassMutual High Yield Fund, Class I (a)		3,100,163		27,529,448
MassMutual Strategic Bond Fund, Class I (a)		1,932,325		19,825,651
MassMutual Total Return Bond Fund, Class I (a)		1,980,884		19,848,461
Vanguard Total Bond Market Index Fund, Institutional Shares		1,317,772		14,745,869
				152,895,958
TOTAL MUTUAL FUNDS (Cost $409,291,608)				434,032,817
TOTAL LONG-TERM INVESTMENTS (Cost $409,291,608)				434,032,817
TOTAL INVESTMENTS — 100.1% (Cost $409,291,608) (b)				434,032,817
Other Assets/(Liabilities) — (0.1)%				(299,913)
NET ASSETS — 100.0%			$	433,732,904

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 RetireSMART^sm by JPMorgan 2035 Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 76.9%
JPMorgan International Research Enhanced Equity Fund, Class R6		365,876	$	7,526,067
JPMorgan Realty Income Fund, Class R6		256,584		4,397,858
MassMutual Blue Chip Growth Fund, Class I (a)		320,746		9,272,757
MassMutual Diversified Value Fund, Class I (a)		511,418		6,520,573
MassMutual Equity Opportunities Fund, Class I (a)		338,673		6,692,172
MassMutual Fundamental Value Fund, Class I (a)		651,824		6,531,279
MassMutual Growth Opportunities Fund, Class I (a)		347,509		2,901,701
MassMutual International Equity Fund, Class I (a)		962,455		8,816,087
MassMutual Mid Cap Growth Fund, Class I (a)		106,282		2,798,402
MassMutual Mid Cap Value Fund, Class I (a)		235,750		2,946,870
MassMutual Overseas Fund, Class I (a)		2,386,726		23,008,043
MassMutual Small Cap Growth Equity Fund, Class I (a)		107,955		1,823,362
MassMutual Small Cap Value Equity Fund, Class I (a)		235,696		2,569,091
MassMutual Strategic Emerging Markets Fund, Class I (a)		355,698		4,357,305
MM Equity Asset Fund, Class I (a)		3,593,981		32,848,987
Vanguard Developed Markets Index Fund, Admiral Shares		278,838		4,584,089
Vanguard Emerging Markets Stock Index Fund, Institutional Shares		288,898		9,007,848
Vanguard Mid-Cap Index Fund, Admiral Shares		8,132		2,565,308
Vanguard Real Estate Index Fund, Admiral Shares		27,953		4,591,803
Vanguard Small-Cap Index Fund, Admiral Shares		18,036		1,954,607
				145,714,209
Fixed Income Funds — 23.2%
JPMorgan Emerging Markets Debt Fund, Class R6		245,502		1,890,369
JPMorgan Emerging Markets Strategic Debt Fund, Class R6		246,882		1,896,054
MassMutual Core Bond Fund, Class I (a)		573,749		6,248,123
MassMutual High Yield Fund, Class I (a)		1,006,830		8,940,654
MassMutual Strategic Bond Fund, Class I (a)		1,141,992		11,716,837
MassMutual Total Return Bond Fund, Class I (a)		1,171,105		11,734,470
Vanguard Total Bond Market Index Fund, Admiral Shares		145,120		1,623,889
				44,050,396
TOTAL MUTUAL FUNDS (Cost $177,820,803)				189,764,605
TOTAL LONG-TERM INVESTMENTS (Cost $177,820,803)				189,764,605
TOTAL INVESTMENTS — 100.1% (Cost $177,820,803) (b)				189,764,605
Other Assets/(Liabilities) — (0.1)%				(135,718)
NET ASSETS — 100.0%			$	189,628,887

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 RetireSMART^sm by JPMorgan 2040 Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 85.9%
JPMorgan International Research Enhanced Equity Fund, Class R6		609,297	$	12,533,247
JPMorgan Realty Income Fund, Class R6		482,676		8,273,074
MassMutual Blue Chip Growth Fund, Class I (a)		593,309		17,152,562
MassMutual Diversified Value Fund, Class I (a)		940,835		11,995,649
MassMutual Equity Opportunities Fund, Class I (a)		622,785		12,306,226
MassMutual Fundamental Value Fund, Class I (a)		1,204,199		12,066,079
MassMutual Growth Opportunities Fund, Class I (a)		641,179		5,353,844
MassMutual International Equity Fund, Class I (a)		1,780,717		16,311,365
MassMutual Mid Cap Growth Fund, Class I (a)		198,790		5,234,132
MassMutual Mid Cap Value Fund, Class I (a)		440,648		5,508,099
MassMutual Overseas Fund, Class I (a)		4,582,779		44,177,993
MassMutual Small Cap Growth Equity Fund, Class I (a)		198,778		3,357,363
MassMutual Small Cap Value Equity Fund, Class I (a)		433,928		4,729,815
MassMutual Strategic Emerging Markets Fund, Class I (a)		664,010		8,134,117
MM Equity Asset Fund, Class I (a)		6,643,905		60,725,292
Vanguard Developed Markets Index Fund, Institutional Shares		507,240		8,349,177
Vanguard Emerging Markets Stock Index Fund, Institutional Shares		529,877		16,521,571
Vanguard Mid-Cap Index Fund, Admiral Shares		14,985		4,727,174
Vanguard Real Estate Index Fund, Admiral Shares		51,947		8,533,415
Vanguard Small-Cap Index Fund, Admiral Shares		32,741		3,548,170
				269,538,364
Fixed Income Funds — 14.2%
JPMorgan Emerging Markets Debt Fund, Class R6		303,710		2,338,569
JPMorgan Emerging Markets Strategic Debt Fund, Class R6		306,083		2,350,715
MassMutual Core Bond Fund, Class I (a)		491,965		5,357,494
MassMutual High Yield Fund, Class I (a)		1,448,725		12,864,681
MassMutual Strategic Bond Fund, Class I (a)		979,594		10,050,632
MassMutual Total Return Bond Fund, Class I (a)		1,004,172		10,061,807
Vanguard Total Bond Market Index Fund, Admiral Shares		122,716		1,373,193
				44,397,091
TOTAL MUTUAL FUNDS (Cost $291,026,154)				313,935,455
TOTAL LONG-TERM INVESTMENTS (Cost $291,026,154)				313,935,455
TOTAL INVESTMENTS — 100.1% (Cost $291,026,154) (b)				313,935,455
Other Assets/(Liabilities) — (0.1)%				(195,715)
NET ASSETS — 100.0%			$	313,739,740

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 RetireSMART^sm by JPMorgan 2045 Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 95.0%
JPMorgan International Research Enhanced Equity Fund, Class R6		260,450	$	5,357,465
JPMorgan Realty Income Fund, Class R6		227,169		3,893,682
MassMutual Blue Chip Growth Fund, Class I (a)		281,253		8,131,024
MassMutual Diversified Value Fund, Class I (a)		445,955		5,685,922
MassMutual Equity Opportunities Fund, Class I (a)		295,298		5,835,081
MassMutual Fundamental Value Fund, Class I (a)		571,373		5,725,155
MassMutual Growth Opportunities Fund, Class I (a)		302,105		2,522,580
MassMutual International Equity Fund, Class I (a)		837,160		7,668,385
MassMutual Mid Cap Growth Fund, Class I (a)		94,091		2,477,427
MassMutual Mid Cap Value Fund, Class I (a)		208,736		2,609,198
MassMutual Overseas Fund, Class I (a)		2,218,705		21,388,321
MassMutual Small Cap Growth Equity Fund, Class I (a)		93,085		1,572,209
MassMutual Small Cap Value Equity Fund, Class I (a)		202,713		2,209,575
MassMutual Strategic Emerging Markets Fund, Class I (a)		313,299		3,837,911
MM Equity Asset Fund, Class I (a)		3,152,976		28,818,196
Vanguard Developed Markets Index Fund, Admiral Shares		245,331		4,033,235
Vanguard Emerging Markets Stock Index Fund, Institutional Shares		257,314		8,023,047
Vanguard Mid-Cap Index Fund, Admiral Shares		7,266		2,292,261
Vanguard Real Estate Index Fund, Admiral Shares		24,998		4,106,467
Vanguard Small-Cap Index Fund, Admiral Shares		15,678		1,698,985
				127,886,126
Fixed Income Funds — 5.1%
JPMorgan Emerging Markets Debt Fund, Class R6		83,096		639,838
JPMorgan Emerging Markets Strategic Debt Fund, Class R6		84,006		645,164
MassMutual Core Bond Fund, Class I (a)		21,418		233,246
MassMutual High Yield Fund, Class I (a)		491,119		4,361,139
MassMutual Strategic Bond Fund, Class I (a)		42,683		437,923
MassMutual Total Return Bond Fund, Class I (a)		43,755		438,422
Vanguard Total Bond Market Index Fund, Admiral Shares		5,397		60,394
				6,816,126
TOTAL MUTUAL FUNDS (Cost $123,876,834)				134,702,252
TOTAL LONG-TERM INVESTMENTS (Cost $123,876,834)				134,702,252
TOTAL INVESTMENTS — 100.1% (Cost $123,876,834) (b)				134,702,252
Other Assets/(Liabilities) — (0.1)%				(105,545)
NET ASSETS — 100.0%			$	134,596,707

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 RetireSMART^sm by JPMorgan 2050 Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 95.0%
JPMorgan International Research Enhanced Equity Fund, Class R6		408,388	$	8,400,540
JPMorgan Realty Income Fund, Class R6		355,917		6,100,424
MassMutual Blue Chip Growth Fund, Class I (a)		439,441		12,704,229
MassMutual Diversified Value Fund, Class I (a)		696,401		8,879,111
MassMutual Equity Opportunities Fund, Class I (a)		461,793		9,125,028
MassMutual Fundamental Value Fund, Class I (a)		892,059		8,938,431
MassMutual Growth Opportunities Fund, Class I (a)		474,953		3,965,858
MassMutual International Equity Fund, Class I (a)		1,318,672		12,079,036
MassMutual Mid Cap Growth Fund, Class I (a)		147,978		3,896,266
MassMutual Mid Cap Value Fund, Class I (a)		327,314		4,091,421
MassMutual Overseas Fund, Class I (a)		3,479,978		33,546,990
MassMutual Small Cap Growth Equity Fund, Class I (a)		146,516		2,474,655
MassMutual Small Cap Value Equity Fund, Class I (a)		318,682		3,473,633
MassMutual Strategic Emerging Markets Fund, Class I (a)		495,383		6,068,447
MM Equity Asset Fund, Class I (a)		4,920,803		44,976,137
Vanguard Developed Markets Index Fund, Admiral Shares		374,070		6,149,708
Vanguard Emerging Markets Stock Index Fund, Institutional Shares		392,373		12,234,180
Vanguard Mid-Cap Index Fund, Admiral Shares		11,080		3,495,337
Vanguard Real Estate Index Fund, Admiral Shares		38,113		6,260,785
Vanguard Small-Cap Index Fund, Admiral Shares		23,907		2,590,757
				199,450,973
Fixed Income Funds — 5.1%
JPMorgan Emerging Markets Debt Fund, Class R6		130,250		1,002,924
JPMorgan Emerging Markets Strategic Debt Fund, Class R6		131,269		1,008,149
MassMutual Core Bond Fund, Class I (a)		33,138		360,868
MassMutual High Yield Fund, Class I (a)		766,075		6,802,743
MassMutual Strategic Bond Fund, Class I (a)		66,037		677,544
MassMutual Total Return Bond Fund, Class I (a)		67,695		678,303
Vanguard Total Bond Market Index Fund, Admiral Shares		8,229		92,079
				10,622,610
TOTAL MUTUAL FUNDS (Cost $193,944,315)				210,073,583
TOTAL LONG-TERM INVESTMENTS (Cost $193,944,315)				210,073,583
TOTAL INVESTMENTS — 100.1% (Cost $193,944,315) (b)				210,073,583
Other Assets/(Liabilities) — (0.1)%				(111,705)
NET ASSETS — 100.0%			$	209,961,878

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 RetireSMART^sm by JPMorgan 2055 Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 95.0%
JPMorgan International Research Enhanced Equity Fund, Class R6		127,689	$	2,626,568
JPMorgan Realty Income Fund, Class R6		111,600		1,912,830
MassMutual Blue Chip Growth Fund, Class I (a)		138,556		4,005,668
MassMutual Diversified Value Fund, Class I (a)		218,501		2,785,891
MassMutual Equity Opportunities Fund, Class I (a)		144,735		2,859,972
MassMutual Fundamental Value Fund, Class I (a)		281,505		2,820,675
MassMutual Growth Opportunities Fund, Class I (a)		148,069		1,236,380
MassMutual International Equity Fund, Class I (a)		408,818		3,744,774
MassMutual Mid Cap Growth Fund, Class I (a)		46,417		1,222,149
MassMutual Mid-Cap Value Fund, Class I (a)		102,652		1,283,154
MassMutual Overseas Fund, Class I (a)		1,087,689		10,485,325
MassMutual Small Cap Growth Equity Fund, Class I (a)		45,898		775,217
MassMutual Small Cap Value Equity Fund, Class I (a)		99,978		1,089,758
MassMutual Strategic Emerging Markets Fund, Class I (a)		153,847		1,884,627
MM Equity Asset Fund, Class I (a)		1,554,842		14,211,252
Vanguard Developed Markets Index Fund, Admiral Shares		124,036		2,039,149
Vanguard Emerging Markets Stock Index Fund, Admiral Shares		98,910		4,055,320
Vanguard Mid-Cap Index Fund, Admiral Shares		3,674		1,158,945
Vanguard Real Estate Index Fund, Admiral Shares		12,639		2,076,149
Vanguard Small-Cap Index Fund, Admiral Shares		7,926		858,994
				63,132,797
Fixed Income Funds — 5.1%
JPMorgan Emerging Markets Debt Fund, Class R6		41,415		318,896
JPMorgan Emerging Markets Strategic Debt Fund, Class R6		41,637		319,771
MassMutual Core Bond Fund, Class I (a)		10,690		116,415
MassMutual High Yield Fund, Class I (a)		241,758		2,146,810
MassMutual Strategic Bond Fund, Class I (a)		21,301		218,548
MassMutual Total Return Bond Fund, Class I (a)		21,839		218,824
Vanguard Total Bond Market Index Fund, Admiral Shares		2,729		30,534
				3,369,798
TOTAL MUTUAL FUNDS (Cost $61,681,613)				66,502,595
TOTAL LONG-TERM INVESTMENTS (Cost $61,681,613)				66,502,595
TOTAL INVESTMENTS — 100.1% (Cost $61,681,613) (b)				66,502,595
Other Assets/(Liabilities) — (0.1)%				(44,089)
NET ASSETS — 100.0%			$	66,458,506

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 RetireSMART^sm by JPMorgan 2060 Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 99.9%
Equity Funds — 94.8%
JPMorgan International Research Enhanced Equity Fund, Class R6		42,606	$	876,405
JPMorgan Realty Income Fund, Class R6		37,440		641,723
MassMutual Blue Chip Growth Fund, Class I (a)		46,359		1,340,244
MassMutual Diversified Value Fund, Class I (a)		73,048		931,367
MassMutual Equity Opportunities Fund, Class I (a)		48,447		957,318
MassMutual Fundamental Value Fund, Class I (a)		94,405		945,936
MassMutual Growth Opportunities Fund, Class I (a)		49,363		412,177
MassMutual International Equity Fund, Class I (a)		136,230		1,247,871
MassMutual Mid Cap Growth Fund, Class I (a)		15,451		406,817
MassMutual Mid Cap Value Fund, Class I (a)		34,358		429,471
MassMutual Overseas Fund, Class I (a)		362,440		3,493,919
MassMutual Small Cap Growth Equity Fund, Class I (a)		15,280		258,077
MassMutual Small Cap Value Equity Fund, Class I (a)		33,317		363,159
MassMutual Strategic Emerging Markets Fund, Class I (a)		50,665		620,646
MM Equity Asset Fund, Class I (a)		520,892		4,760,952
Vanguard Developed Markets Index Fund, Admiral Shares		42,264		694,815
Vanguard Emerging Markets Stock Index Fund, Admiral Shares		33,703		1,381,806
Vanguard Mid-Cap Index Fund, Admiral Shares		1,252		394,859
Vanguard Real Estate Index Fund, Admiral Shares		4,307		707,535
Vanguard Small-Cap Index Fund, Admiral Shares		2,700		292,650
				21,157,747
Fixed Income Funds — 5.1%
JPMorgan Emerging Markets Debt Fund, Class R6		13,880		106,878
JPMorgan Emerging Markets Strategic Debt Fund, Class R6		13,956		107,180
MassMutual Core Bond Fund, Class I (a)		3,572		38,902
MassMutual High Yield Fund, Class I (a)		80,938		718,730
MassMutual Strategic Bond Fund, Class I (a)		7,120		73,047
MassMutual Total Return Bond Fund, Class I (a)		7,299		73,135
Vanguard Total Bond Market Index Fund, Admiral Shares		930		10,406
				1,128,278
TOTAL MUTUAL FUNDS (Cost $20,992,758)				22,286,025
TOTAL LONG-TERM INVESTMENTS (Cost $20,992,758)				22,286,025
TOTAL INVESTMENTS — 99.9% (Cost $20,992,758) (b)				22,286,025
Other Assets/(Liabilities) — 0.1%				29,534
NET ASSETS — 100.0%			$	22,315,559

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.

MM Equity Asset Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.5%
COMMON STOCK — 99.5%
Basic Materials — 2.0%
Chemicals — 1.9%
Air Products & Chemicals, Inc.		2,064	$	627,993
Celanese Corp.		3,600		605,016
DuPont de Nemours, Inc.		15,897		1,284,160
Eastman Chemical Co.		16,651		2,013,272
Linde PLC		3,890		1,347,613
PPG Industries, Inc.		12,730		2,195,161
				8,073,215
Mining — 0.1%
Ferroglobe Representation & Warranty Insurance Trust (a) (b) (c)		3,141		—
Freeport-McMoRan, Inc.		12,761		532,516
				8,605,731
Communications — 14.5%
Internet — 12.2%
Alphabet, Inc. Class A (c)		4,023		11,654,792
Alphabet, Inc. Class C (c)		3,060		8,854,385
Amazon.com, Inc. (c)		5,037		16,795,071
Booking Holdings, Inc. (c)		705		1,691,457
Lyft, Inc. Class A (c)		11,090		473,876
Meta Platforms, Inc. Class A (c)		25,166		8,464,584
Netflix, Inc. (c)		5,276		3,178,473
Shopify, Inc. Class A (c)		411		566,107
				51,678,745
Media — 1.3%
Charter Communications, Inc. Class A (c)		2,304		1,502,139
Comcast Corp. Class A		60,751		3,057,598
Fox Corp. Class A		2,411		88,966
The Walt Disney Co. (c)		5,117		792,572
				5,441,275
Telecommunications — 1.0%
Motorola Solutions, Inc.		1,480		402,116
T-Mobile US, Inc. (c)		20,572		2,385,941
Verizon Communications, Inc.		24,722		1,284,555
				4,072,612
				61,192,632

MM Equity Asset Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Consumer, Cyclical — 9.8%
Airlines — 0.2%
Southwest Airlines Co. (c)		20,627	$	883,661
Apparel — 0.8%
NIKE, Inc. Class B		19,553		3,258,899
Auto Manufacturers — 2.4%
General Motors Co. (c)		16,683		978,124
Rivian Automotive, Inc. Class A (c)		3,180		329,734
Tesla, Inc. (c)		8,288		8,758,593
				10,066,451
Auto Parts & Equipment — 0.3%
Aptiv PLC (c)		2,595		428,045
Magna International, Inc. (d)		9,299		752,661
				1,180,706
Home Builders — 0.7%
D.R. Horton, Inc.		1,437		155,843
Lennar Corp. Class A		16,939		1,967,634
Toll Brothers, Inc.		8,270		598,665
				2,722,142
Leisure Time — 0.0%
Royal Caribbean Cruises Ltd. (c)		2,251		173,102
Lodging — 0.3%
Hilton Worldwide Holdings, Inc. (c)		7,818		1,219,530
Retail — 5.1%
AutoZone, Inc. (c)		380		796,628
Best Buy Co., Inc.		15,360		1,560,576
Dollar General Corp.		1,559		367,659
Dollar Tree, Inc. (c)		3,488		490,134
The Home Depot, Inc.		7,481		3,104,690
Lowe's Cos., Inc.		18,105		4,679,781
McDonald's Corp.		15,348		4,114,338
O'Reilly Automotive, Inc. (c)		4,197		2,964,047
Target Corp.		8,289		1,918,406
The TJX Cos., Inc.		21,958		1,667,051
				21,663,310
				41,167,801
Consumer, Non-cyclical — 19.6%
Agriculture — 0.9%
Altria Group, Inc.		37,759		1,789,399
Philip Morris International, Inc.		22,562		2,143,390
				3,932,789
Beverages — 1.3%
The Coca-Cola Co.		63,430		3,755,690

MM Equity Asset Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Constellation Brands, Inc. Class A		6,015	$	1,509,585
				5,265,275
Biotechnology — 1.3%
Biogen, Inc. (c)		3,291		789,577
BioMarin Pharmaceutical, Inc. (c)		2,457		217,076
Illumina, Inc. (c)		1,500		570,660
Moderna, Inc. (c)		1,566		397,733
Regeneron Pharmaceuticals, Inc. (c)		2,851		1,800,463
Vertex Pharmaceuticals, Inc. (c)		7,501		1,647,219
				5,422,728
Commercial Services — 1.5%
Booz Allen Hamilton Holding Corp.		5,694		482,794
Cintas Corp.		1,081		479,067
FleetCor Technologies, Inc. (c)		4,771		1,067,940
PayPal Holdings, Inc. (c)		4,427		834,844
S&P Global, Inc.		7,730		3,648,019
				6,512,664
Cosmetics & Personal Care — 1.6%
The Estee Lauder Cos., Inc. Class A		4,059		1,502,642
The Procter & Gamble Co.		31,607		5,170,273
				6,672,915
Food — 0.5%
Mondelez International, Inc. Class A		32,018		2,123,114
Health Care – Products — 4.0%
Abbott Laboratories		20,635		2,904,170
ABIOMED, Inc. (c)		460		165,218
Baxter International, Inc.		6,270		538,217
Boston Scientific Corp. (c)		36,172		1,536,587
Danaher Corp.		4,037		1,328,213
Intuitive Surgical, Inc. (c)		2,074		745,188
Medtronic PLC		25,947		2,684,217
PerkinElmer, Inc.		1,606		322,902
Thermo Fisher Scientific, Inc.		7,450		4,970,938
Zimmer Biomet Holdings, Inc.		12,646		1,606,548
				16,802,198
Health Care – Services — 2.8%
Anthem, Inc.		6,380		2,957,385
Centene Corp. (c)		22,419		1,847,326
Humana, Inc.		1,856		860,924
Town Health International Medical Group Ltd. (c)		62,000		3,501
UnitedHealth Group, Inc.		12,131		6,091,460
				11,760,596
Household Products & Wares — 0.5%
Avery Dennison Corp.		3,472		751,931
Kimberly-Clark Corp.		9,253		1,322,439
				2,074,370

MM Equity Asset Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Pharmaceuticals — 5.2%
AbbVie, Inc.		36,214	$	4,903,376
Becton Dickinson and Co.		4,468		1,123,613
Bristol-Myers Squibb Co.		55,269		3,446,022
DexCom, Inc. (c)		966		518,694
Eli Lilly & Co.		14,722		4,066,511
Johnson & Johnson		24,501		4,191,386
McKesson Corp.		2,067		513,794
Merck & Co., Inc.		20,984		1,608,214
Neurocrine Biosciences, Inc. (c)		2,520		214,628
Pfizer, Inc.		23,469		1,385,844
				21,972,082
				82,538,731
Energy — 2.7%
Oil & Gas — 2.5%
Chevron Corp.		21,529		2,526,428
ConocoPhillips		42,875		3,094,718
Coterra Energy, Inc.		4,897		93,043
Diamondback Energy, Inc.		16,052		1,731,208
EOG Resources, Inc.		11,391		1,011,863
Phillips 66		2,255		163,397
Pioneer Natural Resources Co.		10,631		1,933,566
Untrade Brightoil (c)		52,000		10,003
				10,564,226
Pipelines — 0.2%
Cheniere Energy, Inc.		4,933		500,305
The Williams Cos., Inc.		12,322		320,865
				821,170
				11,385,396
Financial — 14.9%
Banks — 5.4%
Bank of America Corp.		49,469		2,200,876
Citigroup, Inc.		39,365		2,377,252
Fifth Third Bancorp		23,004		1,001,824
The Goldman Sachs Group, Inc.		5,771		2,207,696
Morgan Stanley		20,011		1,964,280
Regions Financial Corp.		55,692		1,214,086
State Street Corp.		26,241		2,440,413
SVB Financial Group (c)		1,036		702,657
Truist Financial Corp.		25,900		1,516,445
US Bancorp		46,080		2,588,313
Wells Fargo & Co.		93,932		4,506,857
				22,720,699
Diversified Financial Services — 3.6%
Capital One Financial Corp.		8,780		1,273,890
Intercontinental Exchange, Inc.		9,684		1,324,481
Mastercard, Inc. Class A		16,638		5,978,366
T. Rowe Price Group, Inc.		10,990		2,161,073

MM Equity Asset Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Visa, Inc. Class A		21,594	$	4,679,636
				15,417,446
Insurance — 3.3%
Berkshire Hathaway, Inc. Class B (c)		18,874		5,643,326
Chubb Ltd.		10,313		1,993,606
The Hartford Financial Services Group, Inc.		24,828		1,714,125
The Progressive Corp.		27,634		2,836,630
Prudential Financial, Inc.		7,898		854,880
The Travelers Cos., Inc.		2,568		401,712
Voya Financial, Inc. (d)		5,153		341,696
				13,785,975
Real Estate Investment Trusts (REITS) — 2.6%
Camden Property Trust		7,313		1,306,687
Equinix, Inc.		1,583		1,338,965
Equity LifeStyle Properties, Inc.		9,764		855,912
Host Hotels & Resorts, Inc. (c)		20,145		350,321
Kimco Realty Corp.		27,261		671,984
Prologis, Inc.		19,021		3,202,375
SBA Communications Corp.		2,094		814,608
Sun Communities, Inc.		5,245		1,101,293
UDR, Inc.		3,025		181,470
Ventas, Inc.		20,923		1,069,584
				10,893,199
				62,817,319
Industrial — 7.5%
Aerospace & Defense — 0.8%
Northrop Grumman Corp.		3,679		1,424,031
Raytheon Technologies Corp.		23,037		1,982,564
				3,406,595
Building Materials — 0.5%
Johnson Controls International PLC		16,114		1,310,230
Masco Corp.		13,269		931,749
				2,241,979
Electronics — 0.4%
Honeywell International, Inc.		7,130		1,486,676
Hand & Machine Tools — 0.6%
Stanley Black & Decker, Inc.		12,349		2,329,268
Machinery – Diversified — 1.5%
Deere & Co.		10,081		3,456,674
Ingersoll Rand, Inc.		11,585		716,764
Otis Worldwide Corp.		26,091		2,271,743
				6,445,181
Miscellaneous - Manufacturing — 1.6%
Eaton Corp. PLC		14,826		2,562,229
Parker-Hannifin Corp.		4,828		1,535,884

MM Equity Asset Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Trane Technologies PLC		14,032	$	2,834,885
				6,932,998
Packaging & Containers — 0.1%
WestRock Co.		10,949		485,698
Transportation — 2.0%
FedEx Corp.		5,596		1,447,349
Norfolk Southern Corp.		7,835		2,332,558
Union Pacific Corp.		6,101		1,537,025
United Parcel Service, Inc. Class B		15,042		3,224,102
				8,541,034
				31,869,429
Technology — 26.0%
Computers — 9.5%
Accenture PLC Class A		11,748		4,870,133
Apple, Inc.		164,855		29,273,302
Fortinet, Inc. (c)		1,466		526,880
International Business Machines Corp.		15,619		2,087,636
Leidos Holdings, Inc.		11,992		1,066,089
Seagate Technology Holdings PLC		20,007		2,260,391
				40,084,431
Semiconductors — 7.1%
Advanced Micro Devices, Inc. (c)		23,896		3,438,634
Analog Devices, Inc.		15,736		2,765,917
Applied Materials, Inc.		20,436		3,215,809
Intel Corp.		6,173		317,910
KLA Corp.		1,556		669,251
Lam Research Corp.		5,033		3,619,482
Microchip Technology, Inc.		9,850		857,541
Micron Technology, Inc.		4,592		427,745
NVIDIA Corp.		23,350		6,867,468
NXP Semiconductor NV		11,035		2,513,552
QUALCOMM, Inc.		7,318		1,338,243
Texas Instruments, Inc.		20,599		3,882,294
				29,913,846
Software — 9.4%
Ceridian HCM Holding, Inc. (c)		1,865		194,818
Intuit, Inc.		6,310		4,058,718
Microsoft Corp.		89,950		30,251,984
Oracle Corp.		17,107		1,491,901
salesforce.com, Inc. (c)		6,163		1,566,203
Workday, Inc. Class A (c)		5,236		1,430,371
ZoomInfo Technologies, Inc. Class A (c)		10,095		648,099
				39,642,094
				109,640,371

MM Equity Asset Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Utilities — 2.5%
Electric — 2.5%
CenterPoint Energy, Inc.		59,941	$	1,672,953
DTE Energy Co.		6,993		835,943
Edison International		11,918		813,404
Evergy, Inc.		14,533		997,109
Exelon Corp.		14,762		852,653
FirstEnergy Corp.		36,609		1,522,568
NextEra Energy, Inc.		41,719		3,894,886
				10,589,516
TOTAL COMMON STOCK (Cost $272,592,111)				419,806,926
TOTAL EQUITIES (Cost $272,592,111)				419,806,926
RIGHTS — 0.0%
Consumer, Non-cyclical — 0.0%
Biotechnology — 0.0%
Tobira Therapeutics Inc., CVR (a) (b) (c)		505		3,843
TOTAL RIGHTS (Cost $30)				3,843
MUTUAL FUNDS — 0.0%
Diversified Financial Services — 0.0%
State Street Navigator Securities Lending Government Money Market Portfolio (e)		7,779		7,779
TOTAL MUTUAL FUNDS (Cost $7,779)				7,779
TOTAL LONG-TERM INVESTMENTS (Cost $272,599,920)				419,818,548
	Principal Amount
SHORT-TERM INVESTMENTS — 0.9%
Repurchase Agreement — 0.9%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (f)	$	3,920,550		3,920,550
TOTAL SHORT-TERM INVESTMENTS (Cost $3,920,550)				3,920,550
TOTAL INVESTMENTS — 100.4% (Cost $276,520,470) (g)				423,739,098
Other Assets/(Liabilities) — (0.4)%				(1,639,591)
NET ASSETS — 100.0%			$	422,099,507

Abbreviation Legend

CVR Contingent Value Rights

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Investment was valued using significant unobservable inputs.

(b) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At December 31, 2021, these securities amounted to a value of $3,843 or 0.00% of net assets.

(c) Non-income producing security.

(d) Denotes all or a portion of security on loan. The total value of securities on loan as of December 31, 2021, was $114,056 or 0.03% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $110,238 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

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

(f) Maturity value of $3,920,550. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $3,999,045.

(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	3/18/22		11	$	2,574,560	$	42,615

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 0.0%
PREFERRED STOCK — 0.0%
Energy — 0.0%
Pipelines — 0.0%
Targa Resources Corp.
9.500%		235	$	232,123
TOTAL PREFERRED STOCK (Cost $252,693)				232,123
TOTAL EQUITIES (Cost $252,693)				232,123
	Principal Amount
BONDS & NOTES — 94.0%
BANK LOANS — 2.5%
Advertising — 0.1%
Clear Channel Outdoor Holdings, Inc., Term Loan B, 1 mo. USD LIBOR + 3.500%
3.629% VRN 8/21/26	$	301,891		297,489
Lamar Media Corp., 2020 Term Loan B, 3 mo. USD LIBOR + 1.500%
1.610% VRN 2/05/27		305,000		302,713
				600,202
Aerospace & Defense — 0.0%
Dynasty Acquisition Co., Inc.
2020 Term Loan B1, 3 mo. USD LIBOR + 3.500%
3.724% VRN 4/06/26		106,010		102,982
2020 CAD Term Loan B2, 3 mo. USD LIBOR + 3.500%
3.724% VRN 4/06/26		56,994		55,367

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

	Principal Amount		Value
TransDigm, Inc., 2020 Term Loan G, 1 mo. USD LIBOR + 2.250%
2.354% VRN 8/22/24	$	180,341	$	178,162
				336,511
Airlines — 0.1%
AAdvantage Loyalty IP Ltd., 2021 Term Loan, 1 mo. USD LIBOR + 4.750%
5.500% VRN 4/20/28		440,000		455,162
Mileage Plus Holdings LLC, 2020 Term Loan B, 3 mo. USD LIBOR + 5.250%
6.250% VRN 6/21/27		425,000		447,580
United Airlines, Inc., 2021 Term Loan B, 1 mo. USD LIBOR + 3.750%
4.500% VRN 4/21/28		173,688		173,924
				1,076,666
Auto Parts & Equipment — 0.0%
Clarios Global LP, 2021 USD Term Loan B, 1 mo. USD LIBOR + 3.250%
3.354% VRN 4/30/26		278,229		276,351
Commercial Services — 0.0%
CoreLogic, Inc., Term Loan, 1 mo. USD LIBOR + 3.500%
4.000% VRN 6/02/28		329,175		328,517
Computers — 0.0%
Peraton Corp., Term Loan B, 1 mo. USD LIBOR + 3.750%
4.500% VRN 2/01/28		297,750		297,643
Cosmetics & Personal Care — 0.1%
Sunshine Luxembourg VII SARL, 2021 Term Loan B3, 1 mo. USD LIBOR + 3.750%
4.500% VRN 10/01/26		436,700		438,067
Electric — 0.0%
Pike Corporation, 2021 Incremental Term Loan B, 1 mo. USD LIBOR + 3.000%
3.110% VRN 1/21/28		181,301		180,518
Entertainment — 0.2%
Churchill Downs, Inc., 2021 Incremental Term Loan B1, 1 mo. USD LIBOR + 2.000%
2.110% VRN 3/17/28		590,538		586,108
Delta 2 (LUX) S.A.R.L., 2018 USD Term Loan, 3 mo. USD LIBOR + 2.500%
3.500% VRN 2/01/24		605,000		603,990

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

	Principal Amount		Value
SeaWorld Parks & Entertainment, Inc., 2021 Term Loan B, 1 mo. USD LIBOR + 3.000%
3.500% VRN 8/25/28	$	180,000	$	179,100
UFC Holdings LLC, 2021 Term Loan B, 6 mo. USD LIBOR + 2.750%
3.500% VRN 4/29/26		507,128		504,319
				1,873,517
Environmental Controls — 0.1%
Filtration Group Corp., 2018 1st Lien Term Loan, 1 mo. USD LIBOR + 3.000%
3.104% VRN 3/29/25		471,276		466,710
GFL Environmental, Inc., 2020 Term Loan, 1 mo. USD LIBOR + 3.000%
3.500% VRN 5/30/25		277,272		277,865
Madison IAQ LLC, Term Loan, 1 mo. USD LIBOR + 3.250%
3.750% VRN 6/21/28		174,125		173,859
				918,434
Health Care – Products — 0.1%
Avantor Funding, Inc., 2021 Term Loan B5, 1 mo. USD LIBOR + 2.250%
2.750% VRN 11/08/27		289,275		288,913
ICU Medical, Inc., Term Loan B,
0.000% 1/08/29 (a)		65,000		65,054
Maravai Intermediate Holdings LLC, 2020 Term Loan B, 1 mo. USD LIBOR + 3.750%
4.750% VRN 10/19/27		291,782		292,876
Medline Borrower LP, USD Term Loan B,
0.000% 10/21/28 (a)		130,000		129,943
				776,786
Health Care – Services — 0.2%
ADMI Corp.
2021 Term Loan B2, 1 mo. USD LIBOR + 3.375%
3.875% VRN 12/23/27		263,013		261,150
2021 Incremental Term Loan B3, 1 mo. USD LIBOR + 3.500%
4.000% VRN 12/23/27		184,538		184,047
Catalent Pharma Solutions, Inc., 2021 Term Loan B3, 1 mo. USD LIBOR + 2.000%
2.500% VRN 2/22/28		104,737		104,763
HCA, Inc., 2021 Term Loan B14, 1 mo. USD LIBOR + 1.750%
1.852% VRN 6/30/28		44,775		44,903

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

	Principal Amount		Value
RegionalCare Hospital Partners Holdings, Inc., 2018 Term Loan B, 1 mo. USD LIBOR + 3.750%
3.852% VRN 11/16/25	$	209,589	$	209,197
Surgery Center Holdings, Inc., 2021 Term Loan, 1 mo. USD LIBOR + 3.750%
4.500% VRN 8/31/26		296,981		296,610
U.S. Renal Care, Inc., 2019 Term Loan B, 1 mo. USD LIBOR + 5.000%
5.104% VRN 6/26/26		118,785		115,266
				1,215,936
Insurance — 0.3%
Alliant Holdings Intermediate LLC
2018 Term Loan B, 1 mo. USD LIBOR + 3.250%
3.354% VRN 5/09/25		226,339		223,894
2021 Term Loan B4, 1 mo. USD LIBOR + 3.500%
4.000% VRN 11/06/27		215,000		214,579
Asurion LLC
2018 Term Loan B7, 1 mo. USD LIBOR + 3.000%
3.104% VRN 11/03/24		322,786		321,114
2020 Term Loan B8, 1 mo. USD LIBOR + 3.250%
3.354% VRN 12/23/26		549,436		545,316
2021 2nd Lien Term Loan B3, 1 mo. USD LIBOR + 5.250%
5.354% VRN 1/31/28		74,697		74,884
2021 Second Lien Term Loan B4, 1 mo. USD LIBOR + 5.250%
5.354% VRN 1/20/29		545,000		542,389
Hub International Limited, 2021 Term Loan B, 1 mo. USD LIBOR + 3.250%
4.000% VRN 4/25/25		437,970		437,558
				2,359,734
Internet — 0.0%
Eagle Broadband Investments LLC, Term Loan,
0.000% VRN 11/12/27 (a)		49,875		49,782
Lodging — 0.1%
Caesars Resort Collection LLC
2017 1st Lien Term Loan B, 1 mo. USD LIBOR + 2.750%
2.854% VRN 12/23/24		193,123		191,916
2020 Term Loan B1, 1 mo. USD LIBOR + 3.500%
3.604% VRN 7/21/25		261,874		261,808
				453,724

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

	Principal Amount		Value
Machinery – Construction & Mining — 0.0%
Brookfield WEC Holdings, Inc., 2021 Term Loan, 1 mo. USD LIBOR + 2.750%
3.250% VRN 8/01/25	$	237,600	$	235,595
Machinery – Diversified — 0.1%
TK Elevator Vertical US Newco, Inc., Term Loan B, 6 mo. USD LIBOR + 3.500%
4.000% VRN 7/30/27		730,985		730,883
Media — 0.1%
The E.W. Scripps Co., 2020 Term Loan B3, 1 mo. USD LIBOR + 3.000%
3.750% VRN 1/07/28		147,475		147,270
Mission Broadcasting, Inc., 2021 Term Loan B, 1 mo. USD LIBOR + 2.500%
2.599% VRN 5/26/28		174,563		173,981
Univision Communication, Inc. 2021 Term Loan B
0.000% 5/05/28 (a)		250,000		249,375
				570,626
Packaging & Containers — 0.1%
Charter NEX US, Inc., 2021 Term Loan, 1 mo. USD LIBOR + 3.750%
4.500% VRN 12/01/27		715,544		716,439
Pharmaceuticals — 0.1%
Gainwell Acquisition Corp., Term Loan B, 1 mo. USD LIBOR + 4.000%
4.750% VRN 10/01/27		287,349		287,780
ICON Luxembourg S.A.R.L.
LUX Term Loan, 1 mo. USD LIBOR + 2.250%
2.750% VRN 7/03/28		185,121		185,043
US Term Loan, 1 mo. USD LIBOR + 2.250%
2.750% VRN 7/03/28		46,123		46,104
PetVet Care Centers, LLC, 2021 Term Loan B3, 1 mo. USD LIBOR + 3.500%
4.250% VRN 2/14/25		292,050		291,685
				810,612
Pipelines — 0.1%
Buckeye Partners, L.P., 2021 Term Loan B, 1 mo. USD LIBOR + 2.250%
2.354% VRN 11/01/26		378,291		376,615

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

	Principal Amount		Value
Retail — 0.2%
IRB Holding Corp., 2020 Fourth Amendment Incremental Term Loan, 1 mo. USD LIBOR + 3.250%
4.250% VRN 12/15/27	$	362,035	$	361,694
KFC Holding Co., 2021 Term Loan B, 1 mo. USD LIBOR + 1.750%
1.854% VRN 3/15/28		728,798		726,218
Staples, Inc., 7 Year Term Loan, 3 mo. USD LIBOR + 5.000%
5.132% VRN 4/16/26		8,121		7,833
WOOF Holdings, Inc., 1st Lien Term Loan, 3 mo. USD LIBOR + 3.750%
4.500% VRN 12/21/27		278,600		278,600
				1,374,345
Software — 0.5%
Applied Systems, Inc., 2017 1st Lien Term Loan, 1 mo. USD LIBOR + 3.000%
3.500% VRN 9/19/24		872,227		871,355
Ascend Learning LLC, 2021 Term Loan,
0.000% 12/10/28 (a)		315,000		314,279
Camelot U.S. Acquisition 1 Co.
Term Loan B, 1 mo. USD LIBOR + 3.000%
3.104% VRN 10/30/26		102,900		102,107
2020 Incremental Term Loan B, 1 mo. USD LIBOR + 3.000%
4.000% VRN 10/30/26		108,900		108,730
CCC Intelligent Solutions, Inc., Term Loan B, 3 mo. USD LIBOR + 2.500%
3.000% FRN 9/21/28		185,000		184,711
Epicor Software Corp., 2020 Term Loan, 1 mo. USD LIBOR + 3.250%
4.000% VRN 7/30/27		297,415		297,005
Hyland Software, Inc., 2018 1st Lien Term Loan, 1 mo. USD LIBOR + 3.500%
4.250% VRN 7/01/24		24,808		24,882
Polaris Newco LLC, USD Term Loan B, 1 mo. USD LIBOR + 4.000%
4.500% VRN 6/02/28		159,788		159,637
RealPage, Inc., 1st Lien Term Loan, 1 mo. USD LIBOR + 3.250%
3.750% VRN 4/24/28		455,000		453,366
The Ultimate Software Group, Inc.
2021 Term Loan, 3 mo. USD LIBOR + 3.250%
3.750% VRN 5/04/26		946,488		940,866
2021 2nd Lien Term Loan, 1 mo. USD LIBOR + 5.250%
5.750% VRN 5/03/27		70,000		70,132
				3,527,070

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

	Principal Amount		Value
Telecommunications — 0.0%
Iridium Satellite LLC, 2021 Term Loan B2, 1 mo. USD LIBOR + 2.500%
3.250% VRN 11/04/26	$	201,994	$	201,814
TOTAL BANK LOANS (Cost $19,714,865)				19,726,387
CORPORATE DEBT — 30.4%
Agriculture — 0.3%
BAT Capital Corp.
3.557% 8/15/27		770,000		808,096
BAT International Finance PLC
1.668% 3/25/26		205,000		201,345
3.950% 6/15/25 (b)		786,000		835,147
Bunge Finance Europe BV
1.850% 6/16/23 EUR (c)		220,000		255,920
Reynolds American, Inc.
4.450% 6/12/25		395,000		426,495
				2,527,003
Airlines — 0.1%
American Airlines, Inc. /AAdvantage Loyalty IP Ltd.
5.500% 4/20/26 (b)		170,000		176,779
5.750% 4/20/29 (b)		160,000		170,814
Mileage Plus Holdings LLC / Mileage Plus Intellectual Property Assets Ltd.
6.500% 6/20/27 (b)		525,000		560,438
United Airlines Pass Through Trust
2.900% 11/01/29		148,813		147,561
2.700% 11/01/33		93,558		92,806
				1,148,398
Apparel — 0.0%
Wolverine World Wide, Inc.
4.000% 8/15/29 (b)		285,000		277,097
Auto Manufacturers — 1.2%
American Honda Finance Corp.
0.750% 11/25/26 GBP (c)		130,000		169,740
1.950% 10/18/24 EUR (c)		200,000		240,073
BMW Finance NV
0.010% 3/24/23 EUR (b) (c)		117,000		133,680

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

	Principal Amount		Value
0.010% 4/14/23 EUR (b) (c)	$	84,000	$	95,974
0.500% 11/22/22 EUR (b) (c)		105,000		120,499
1.250% 9/05/22 EUR (b) (c)		92,000		105,932
Daimler Finance North America LLC
2.450% 3/02/31 (b) (d)		255,000		259,363
Daimler International Finance BV
0.625% 2/27/23 EUR (b) (c)		112,000		128,938
0.750% 5/11/23 EUR (b) (c)		80,000		92,365
2.375% 9/12/22 EUR (b) (c)		72,000		83,559
Ford Motor Co.
9.000% 4/22/25		90,000		110,034
9.625% 4/22/30		145,000		212,244
General Motors Financial Co., Inc.
0.850% 2/26/26 EUR (b) (c)		350,000		402,561
0.955% 9/07/23 EUR (b) (c)		110,000		127,155
4.000% 10/06/26		620,000		669,822
4.350% 4/09/25		750,000		807,221
5.100% 1/17/24		435,000		466,495
Hyundai Capital America
1.800% 10/15/25 (b)		300,000		298,521
2.100% 9/15/28 (b)		470,000		457,015
RCI Banque SA
0.250% 3/08/23 EUR (b) (c)		55,000		62,766
0.750% 9/26/22 EUR (b) (c)		71,000		81,192
0.750% 4/10/23 EUR (b) (c)		68,000		77,923
Stellantis NV
2.375% 4/14/23 EUR (b) (c)		53,000		62,206
Toyota Motor Credit Corp.
0.750% 7/21/22 EUR (b) (c)		104,000		119,146
2.375% 2/01/23 EUR (b) (c)		81,000		94,911
Volkswagen Bank GmbH
0.750% 6/15/23 EUR (b) (c)		80,000		92,128
2.500% 7/31/26 EUR (b) (c)		700,000		869,926
Volkswagen Financial Services AG
0.875% 4/12/23 EUR (b) (c)		72,000		82,976
2.500% 4/06/23 EUR (b) (c)		67,000		78,777
Volkswagen Group of America Finance LLC
3.200% 9/26/26 (b) (d)		1,320,000		1,389,622
3.350% 5/13/25 (b)		500,000		526,270
Volkswagen International Finance NV
0.875% 1/16/23 EUR (b) (c)		120,000		138,192
1.875% 3/30/27 EUR (b) (c)		200,000		244,113
Volkswagen Leasing GmbH

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

	Principal Amount		Value
1.500% 6/19/26 EUR (b) (c)	$	145,000	$	172,754
1.625% 8/15/25 EUR (b) (c)		150,000		178,567
2.375% 9/06/22 EUR (b) (c)		100,000		115,898
				9,368,558
Auto Parts & Equipment — 0.1%
Continental AG
0.010% 9/12/23 EUR (b) (c)		45,000		51,304
The Goodyear Tire & Rubber Co.
5.000% 7/15/29 (b)		315,000		338,373
Tenneco, Inc.
7.875% 1/15/29 (b)		155,000		167,400
5.125% 4/15/29 (b)		79,000		77,222
				634,299
Banks — 7.3%
ABN AMRO Bank NV
2.500% 11/29/23 EUR (b) (c)		114,000		136,548
AIB Group PLC
2.250% 7/03/25 EUR (b) (c)		300,000		364,641
Arion Banki HF
1.000% 3/20/23 EUR (b) (c)		150,000		172,633
Banco Bilbao Vizcaya Argentaria SA
0.375% 10/02/24 EUR (b) (c)		200,000		229,197
0.750% 9/11/22 EUR (b) (c)		100,000		114,738
Banco Comercial Portugues SA 5 year EUR Swap + 4.267%
4.500% VRN 12/07/27 EUR (b) (c)		100,000		115,273
Banco de Bogota SA
6.250% 5/12/26 (b)		250,000		270,000
Banco de Credito del Peru
5 year CMT + 3.000% 3.125% VRN 7/01/30 (b)		240,000		237,002
5 year CMT + 3.000% 3.125% VRN 7/01/30 (b) (d)		135,000		133,314
Banco de Sabadell SA
0.875% 3/05/23 EUR (b) (c)		300,000		344,859
Banco Santander SA
1.125% 1/17/25 EUR (b) (c)		300,000		350,922
1.375% 12/14/22 EUR (b) (c)		100,000		115,767
1 year CMT + .900% 1.722% VRN 9/14/27		400,000		392,953
2.746% 5/28/25		1,200,000		1,240,838
3.490% 5/28/30		200,000		211,341
Bangkok Bank PCL

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

	Principal Amount		Value
5 year CMT + 1.900% 3.733% VRN 9/25/34 (b)	$	450,000	$	459,873
4.450% 9/19/28 (b)		330,000		376,032
Bank Hapoalim BM 5 year CMT + 2.155%
3.255% VRN 1/21/32 (b)		200,000		198,000
Bank of America Corp.
0.750% 7/26/23 EUR (b) (c)		110,000		126,977
1.625% 9/14/22 EUR (b) (c)		111,000		128,206
SOFR + .960% 1.734% VRN 7/22/27		585,000		581,073
SOFR + 1.530% 1.898% VRN 7/23/31		1,240,000		1,188,053
SOFR + 1.220% 2.299% VRN 7/21/32		935,000		920,377
2.375% 6/19/24 EUR (b) (c)		150,000		180,819
2.375% 6/19/24 EUR (b) (c)		150,000		180,819
3 mo. USD LIBOR + .990% 2.496% VRN 2/13/31		1,735,000		1,741,172
SOFR + 2.150% 2.592% VRN 4/29/31		585,000		591,559
3 mo. USD LIBOR + 1.040% 3.419% VRN 12/20/28		55,000		58,763
3 mo. USD LIBOR + 1.060% 3.559% VRN 4/23/27		495,000		529,608
3.950% 4/21/25		1,365,000		1,459,566
4.250% 10/22/26		700,000		772,839
Banque Federative du Credit Mutuel SA
0.750% 6/15/23 EUR (b) (c)		100,000		115,467
Barclays PLC
1.875% 12/08/23 EUR (b) (c)		113,000		133,507
SOFR + 2.714% 2.852% VRN 5/07/26		670,000		691,299
3 mo. USD LIBOR + 1.610% 3.932% VRN 5/07/25		475,000		499,626
BBVA Bancomer SA 5 year CMT + 2.650%
5.125% VRN 1/18/33 (b)		300,000		307,878
BNP Paribas SA
SOFR + 1.004% 1.323% VRN 1/13/27 (b)		890,000		866,468
3 mo. EURIBOR + 1.800% 2.125% VRN 1/23/27 EUR (b) (c)		300,000		363,959
SOFR + 1.218% 2.159% VRN 9/15/29 (b)		345,000		338,090
2.875% 10/24/22 EUR (b) (c)		96,000		112,225
2.875% 9/26/23 EUR (b) (c)		153,000		183,574
4.500% 3/21/23 EUR (b) (c)		157,000		189,253
BPCE SA
0.375% 10/05/23 EUR (b) (c)		100,000		114,998
4.625% 7/18/23 EUR (b) (c)		100,000		121,785
CaixaBank SA
1.125% 1/12/23 EUR (b) (c)		100,000		115,295
1.125% 5/17/24 EUR (b) (c)		100,000		116,542
1.750% 10/24/23 EUR (b) (c)		100,000		117,332
5 year EUR Swap + 2.350% 2.750% VRN 7/14/28 EUR (b) (c)		200,000		235,096
Citigroup, Inc.
0.750% 10/26/23 EUR (b) (c)		110,000		127,008

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

	Principal Amount		Value
SOFR + 1.167% 2.561% VRN 5/01/32	$	300,000	$	301,899
SOFR + 2.842% 3.106% VRN 4/08/26		475,000		498,159
Commerzbank AG
0.500% 8/28/23 EUR (b) (c)		142,000		163,292
1.500% 9/21/22 EUR (c)		18,000		20,765
Cooperatieve Rabobank UA
0.750% 8/29/23 EUR (b) (c)		100,000		115,615
2.375% 5/22/23 EUR (b) (c)		130,000		153,495
3.875% 7/25/23 EUR (b) (c)		118,000		142,839
4.125% 9/14/22 EUR (b) (c)		115,000		134,909
4.625% 5/23/29 GBP (b) (c)		150,000		235,258
Credit Agricole SA
0.875% 1/14/32 EUR (b) (c)		200,000		227,988
1.000% 9/16/24 EUR (b) (c)		200,000		234,306
Credit Suisse AG/London
1.000% 6/07/23 EUR (b) (c)		111,000		128,507
Credit Suisse Group AG
BPSW1 + 1.230% 2.125% VRN 9/12/25 GBP (b) (c)		250,000		340,159
SOFR + 3.730% 4.194% VRN 4/01/31 (b)		480,000		529,875
Danske Bank A/S
0.250% 11/28/22 EUR (b) (c)		109,000		124,824
0.875% 5/22/23 EUR (b) (c)		110,000		126,743
5 year EUR Swap + 1.700% 1.375% VRN 2/12/30 EUR (b) (c)		200,000		230,751
3 mo. USD LIBOR + 1.591% 3.244% VRN 12/20/25 (b)		1,040,000		1,080,782
3.875% 9/12/23 (b)		5,000		5,201
5.375% 1/12/24 (b)		200,000		215,325
Deutsche Bank AG
1.125% 8/30/23 EUR (b) (c)		114,000		132,393
2.375% 1/11/23 EUR (b) (c)		100,000		116,928
Discover Bank
4.650% 9/13/28		405,000		459,900
DNB Bank ASA
0.050% 11/14/23 EUR (b) (c)		109,000		124,653
DNB Boligkreditt AS
1.875% 11/21/22 EUR (b) (c)		100,000		116,272
The Goldman Sachs Group, Inc.
1.375% 7/26/22 EUR (b) (c)		118,000		135,720
1.375% 5/15/24 EUR (b) (c)		40,000		46,463
SOFR + .818% 1.542% VRN 9/10/27		605,000		593,092
1.625% 7/27/26 EUR (b) (c)		140,000		168,197
2.000% 7/27/23 EUR (b) (c)		130,000		152,973
SOFR + 1.248% 2.383% VRN 7/21/32		510,000		502,731
SOFR + 1.281% 2.615% VRN 4/22/32		2,950,000		2,974,550

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

	Principal Amount		Value
SOFR + 1.264% 2.650% VRN 10/21/32	$	520,000	$	523,873
3.250% 2/01/23 EUR (b) (c)		134,000		158,288
3.500% 11/16/26		745,000		794,325
Heta Asset Resolution AG
2.375% 12/13/22 EUR (b) (c)		1,100,000		1,286,789
HSBC Continental Europe SA
0.600% 3/20/23 EUR (b) (c)		100,000		115,091
HSBC Holdings PLC
SOFR + 1.538% 1.645% VRN 4/18/26		940,000		932,599
SOFR + 1.929% 2.099% VRN 6/04/26		610,000		614,219
6.500% 5/20/24 GBP (b) (c)		100,000		150,844
ING Groep NV
1.000% 9/20/23 EUR (b) (c)		100,000		116,094
SOFR + 1.005% 1.726% VRN 4/01/27		260,000		258,392
Intesa Sanpaolo SpA
1.000% 7/04/24 EUR (b) (c)		300,000		348,494
2.125% 8/30/23 EUR (b) (c)		114,000		134,467
JP Morgan Chase & Co.
1.500% 10/26/22 EUR (b) (c)		111,000		128,414
SOFR + .885% 1.578% VRN 4/22/27		630,000		622,914
SOFR + 1.105% 1.764% VRN 11/19/31		955,000		906,159
SOFR + 1.890% 2.182% VRN 6/01/28		675,000		680,960
SOFR + 1.510% 2.739% VRN 10/15/30		445,000		457,671
2.750% 2/01/23 EUR (b) (c)		114,000		134,120
SOFR + 2.515% 2.956% VRN 5/13/31		2,320,000		2,404,515
KBC Group NV
0.750% 10/18/23 EUR (b) (c)		100,000		115,804
Kookmin Bank
2.500% 11/04/30 (b)		200,000		195,938
Kreditanstalt fuer Wiederaufbau
4.700% 6/02/37 CAD (c)		75,000		75,319
4.700% 6/02/37 CAD (c)		65,000		65,276
Landsbankinn HF
0.375% 5/23/25 EUR (b) (c)		265,000		299,158
1.000% 5/30/23 EUR (b) (c)		100,000		115,022
Lloyds Bank Corporate Markets PLC
0.250% 10/04/22 EUR (b) (c)		100,000		114,419
Morgan Stanley
3 mo. EURIBOR + .698% 0.406% VRN 10/29/27 EUR (c)		100,000		113,070
3 mo. EURIBOR + .753% 0.637% VRN 7/26/24 EUR (c)		100,000		115,138
1.000% 12/02/22 EUR (c)		110,000		126,853
SOFR + .858% 1.512% VRN 7/20/27		730,000		718,908
SOFR + .879% 1.593% VRN 5/04/27		670,000		663,206

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

	Principal Amount		Value
1.875% 3/30/23 EUR (c)	$	113,000	$	132,046
SOFR + 1.020% 1.928% VRN 4/28/32		215,000		205,675
SOFR + 1.178% 2.239% VRN 7/21/32		460,000		450,442
SOFR + 1.485% 3.217% VRN 4/22/42		165,000		173,358
National Australia Bank Ltd.
0.625% 11/10/23 EUR (b) (c)		56,000		64,740
2.750% 8/08/22 EUR (b) (c)		92,000		106,760
The Nationale-Nederlanden Bank NV
0.375% 2/26/25 EUR (b) (c)		100,000		114,992
Natwest Group PLC
3 mo. EURIBOR + 2.039% 2.000% VRN 3/08/23 EUR (b) (c)		110,000		125,751
2.500% 3/22/23 EUR (b) (c)		114,000		133,951
Nordea Bank Abp
1.000% 2/22/23 EUR (b) (c)		111,000		128,328
QNB Finance Ltd.
2.750% 2/12/27 (b)		800,000		821,000
Raiffeisen Bank International AG 5 year EUR Swap + 2.150%
1.500% VRN 3/12/30 EUR (b) (c)		300,000		345,474
Santander UK Group Holdings PLC
1.125% 9/08/23 EUR (b) (c)		111,000		128,977
1 year CMT + 1.250% 1.532% VRN 8/21/26		1,465,000		1,441,716
Shinhan Bank Co. Ltd.
3.875% 3/24/26 (b)		200,000		213,784
4.000% 4/23/29 (b)		1,000,000		1,102,117
Societe Generale SA
4.250% 7/13/22 EUR (b) (c)		100,000		116,663
Standard Chartered PLC
5 year EUR Swap + 2.800% 2.500% VRN 9/09/30 EUR (b) (c)		300,000		357,746
3 mo. USD LIBOR + 1.209% 2.819% VRN 1/30/26 (b)		200,000		205,097
1 year CMT + 3.850% 4.644% VRN 4/01/31 (b)		2,030,000		2,299,047
The Toronto-Dominion Bank
0.625% 7/20/23 EUR (b) (c)		110,000		126,918
UBS Group AG 1 year CMT + 1.080%
1.364% VRN 1/30/27 (b)		235,000		229,814
UniCredit SpA
2.000% 3/04/23 EUR (b) (c)		313,000		365,117
EUAMDB05 + 4.739% 4.875% VRN 2/20/29 EUR (b) (c)		200,000		244,240
Wells Fargo & Co.
1.500% 9/12/22 EUR (b) (c)		111,000		128,080
2.250% 5/02/23 EUR (b) (c)		114,000		133,928
SOFR + 2.100% 2.393% VRN 6/02/28		1,105,000		1,123,792
SOFR + 1.262% 2.572% VRN 2/11/31		1,225,000		1,251,812
2.625% 8/16/22 EUR (b) (c)		113,000		131,098

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

	Principal Amount		Value
SOFR + 1.432% 2.879% VRN 10/30/30	$	2,145,000	$	2,232,067
SOFR + 2.530% 3.068% VRN 4/30/41		335,000		344,505
4.300% 7/22/27		290,000		323,293
				57,996,395
Beverages — 0.3%
Anheuser-Busch InBev SA/NV
2.000% 1/23/35 EUR (b) (c)		150,000		187,028
Anheuser-Busch InBev Worldwide, Inc.
4.439% 10/06/48		215,000		257,841
4.500% 6/01/50		1,935,000		2,393,893
				2,838,762
Building Materials — 0.3%
Boral Finance Pty Ltd.
3.000% 11/01/22 (b)		170,000		171,855
3.750% 5/01/28 (b)		1,060,000		1,125,147
Cemex SAB de CV
3.875% 7/11/31 (b)		400,000		398,532
Cie de Saint-Gobain
1.750% 4/03/23 EUR (b) (c)		100,000		116,449
CRH Finance UK PLC
4.125% 12/02/29 GBP (b) (c)		150,000		236,017
HeidelbergCement Finance Luxembourg SA
0.500% 8/09/22 EUR (b) (c)		64,000		73,069
Holcim Finance Luxembourg SA
1.375% 5/26/23 EUR (b) (c)		111,000		128,585
Johnson Controls International PLC
1.000% 9/15/23 EUR (c)		111,000		128,482
				2,378,136
Chemicals — 0.3%
BASF SE
0.101% 6/05/23 EUR (b) (c)		100,000		114,339
Eastman Chemical Co.
1.500% 5/26/23 EUR (c)		111,000		128,510
Equate Petrochemical BV
2.625% 4/28/28 (b)		200,000		200,250
4.250% 11/03/26 (b)		500,000		543,194
Evonik Industries AG
1.000% 1/23/23 EUR (b) (c)		84,000		96,619

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

	Principal Amount		Value
LANXESS AG
2.625% 11/21/22 EUR (b) (c)	$	60,000	$	70,085
Methanex Corp.
5.125% 10/15/27		225,000		236,250
Westlake Chemical Corp.
1.625% 7/17/29 EUR (c)		675,000		794,577
				2,183,824
Commercial Services — 0.4%
Abertis Infraestructuras SA
3.000% 3/27/31 EUR (b) (c)		100,000		130,438
Adani Ports & Special Economic Zone Ltd.
4.200% 8/04/27 (b)		250,000		259,481
Holding d'Infrastructures de Transport SASU
0.625% 3/27/23 EUR (b) (c)		100,000		114,628
Prime Security Services Borrower LLC/Prime Finance, Inc.
5.750% 4/15/26 (b)		105,000		112,735
Shanghai Port Group BVI Development Co. Ltd.
2.375% 7/13/30 (b)		200,000		199,289
2.850% 9/11/29 (b)		520,000		537,336
3.375% 6/18/29 (b)		400,000		427,808
Transurban Finance Co.
2.450% 3/16/31 (b)		920,000		912,106
3.375% 3/22/27 (b)		560,000		594,653
Verisure Holding AB
3.250% 2/15/27 EUR (b) (c)		100,000		113,431
3.875% 7/15/26 EUR (b) (c)		100,000		115,809
				3,517,714
Computers — 0.1%
Capgemini SE
1.625% 4/15/26 EUR (b) (c)		200,000		240,944
2.500% 7/01/23 EUR (b) (c)		100,000		117,687
International Business Machines Corp.
0.375% 1/31/23 EUR (c)		109,000		124,941
				483,572
Diversified Financial Services — 1.4%
AerCap Ireland Capital DAC / AerCap Global Aviation Trust
2.450% 10/29/26		525,000		529,652
3.000% 10/29/28		265,000		268,976

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

	Principal Amount		Value
3.300% 1/30/32	$	280,000	$	285,825
3.500% 1/15/25 (d)		150,000		156,621
4.450% 4/03/26		270,000		293,428
4.875% 1/16/24		540,000		574,343
6.500% 7/15/25		150,000		171,482
Avolon Holdings Funding Ltd.
2.528% 11/18/27 (b)		531,000		516,187
3.950% 7/01/24 (b)		125,000		131,007
4.250% 4/15/26 (b)		150,000		159,035
4.375% 5/01/26 (b)		270,000		289,332
Capital One Financial Corp.
1.650% 6/12/29 EUR (c)		300,000		357,323
3.650% 5/11/27		510,000		549,744
3.750% 3/09/27		115,000		124,576
Discover Financial Services
4.100% 2/09/27		510,000		553,103
Encore Capital Group, Inc.
5.375% 2/15/26 GBP (b) (c)		140,000		196,129
FCA Bank SpA/Ireland
0.500% 9/18/23 EUR (b) (c)		109,000		124,972
0.500% 9/13/24 EUR (b) (c)		160,000		183,676
0.625% 11/24/22 EUR (b) (c)		109,000		124,902
Intercontinental Exchange, Inc.
1.850% 9/15/32		1,960,000		1,879,946
2.100% 6/15/30		805,000		798,694
2.650% 9/15/40		185,000		179,389
Iqera Group SAS
4.250% 9/30/24 EUR (b) (c)		100,000		113,850
LeasePlan Corp. NV
0.125% 9/13/23 EUR (c)		108,000		123,273
0.750% 10/03/22 EUR (b) (c)		109,000		125,024
EUAMDB05 + 7.556% 7.375% VRN EUR (b) (c) (e)		200,000		251,292
LSEGA Financing PLC
2.000% 4/06/28 (b)		1,225,000		1,210,153
2.500% 4/06/31 (b)		435,000		436,754
3.200% 4/06/41 (b)		200,000		209,340
Navient Corp.
6.750% 6/15/26		210,000		232,123
				11,150,151
Electric — 1.4%
Ausgrid Finance Pty Ltd.

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

	Principal Amount		Value
3.850% 5/01/23 (b)	$	585,000	$	600,756
4.350% 8/01/28 (b)		260,000		291,066
China Southern Power Grid International Finance BVI Co. Ltd.
4.250% 9/18/28 (b) (d)		400,000		453,124
ContourGlobal Power Holdings SA
3.125% 1/01/28 EUR (b) (c)		100,000		111,693
DPL, Inc.
4.125% 7/01/25		105,000		109,766
E.ON International Finance BV
0.750% 11/30/22 EUR (b) (c)		79,000		90,574
E.ON SE
0.010% 9/29/22 EUR (b) (c)		53,000		60,486
0.010% 10/24/22 EUR (b) (c)		85,000		97,010
0.375% 4/20/23 EUR (b) (c)		104,000		119,268
Edison International
4.950% 4/15/25		30,000		32,637
Enel Finance International NV
4.875% 4/17/23 EUR (b) (c)		120,000		145,780
5.000% 9/14/22 EUR (b) (c)		135,000		159,473
5.250% 9/29/23 EUR (c)		26,000		32,415
5.625% 8/14/24 GBP (b) (c)		150,000		225,411
Engie SA
0.375% 2/28/23 EUR (b) (c)		100,000		114,527
3.000% 2/01/23 EUR (b) (c)		84,000		99,088
IE2 Holdco SAU
2.875% 6/01/26 EUR (b) (c)		200,000		247,459
Minejesa Capital BV
5.625% 8/10/37 (b)		300,000		313,500
NextEra Energy Capital Holdings, Inc.
2.440% 1/15/32		595,000		597,011
3.000% 1/15/52		550,000		550,526
NRG Energy, Inc.
4.450% 6/15/29 (b)		230,000		250,414
OmGrid Funding Ltd.
5.196% 5/16/27 (b)		425,000		436,739
Pacific Gas and Electric Co.
2.100% 8/01/27		540,000		521,697
2.500% 2/01/31		600,000		571,844
3.300% 8/01/40		500,000		464,781
4.550% 7/01/30		1,700,000		1,839,740
State Grid Overseas Investment BVI Ltd.
1.375% 5/02/25 EUR (b) (c)		100,000		117,898
3.500% 5/04/27 (b)		600,000		647,586

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

	Principal Amount		Value
TNB Global Ventures Capital Bhd
3.244% 10/19/26 (b)	$	380,000	$	396,564
Vistra Operations Co. LLC
3.550% 7/15/24 (b)		1,285,000		1,323,512
4.375% 5/01/29 (b)		250,000		250,408
				11,272,753
Electrical Components & Equipment — 0.0%
Schneider Electric SE
1.500% 9/08/23 EUR (b) (c)		100,000		116,829
Electronics — 0.1%
Arrow Electronics, Inc.
4.000% 4/01/25		375,000		399,963
Engineering & Construction — 0.1%
Cellnex Telecom SA
1.750% 10/23/30 EUR (b) (c) (d)		200,000		218,737
Infrastrutture Wireless Italiane SpA
1.625% 10/21/28 EUR (b) (c)		155,000		178,475
				397,212
Entertainment — 0.1%
Cirsa Finance International Sarl
4.500% 3/15/27 EUR (b) (c)		100,000		111,288
6.250% 12/20/23 EUR (b) (c)		84,917		97,737
International Game Technology PLC
3.500% 6/15/26 EUR (b) (c)		100,000		116,041
3.500% 6/15/26 EUR (b) (c)		100,000		116,042
Pinewood Finance Co. Ltd.
3.625% 11/15/27 GBP (b) (c)		100,000		134,766
				575,874
Environmental Controls — 0.1%
Madison IAQ LLC
4.125% 6/30/28 (b)		155,000		155,387
Waste Connections, Inc.
2.200% 1/15/32		415,000		406,932
				562,319

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

	Principal Amount		Value
Food — 0.3%
Albertsons Cos., Inc./Safeway, Inc./New Albertsons LP/Albertson's LLC
4.875% 2/15/30 (b)	$	170,000	$	183,552
Bellis Acquisition Co. PLC
3.250% 2/16/26 GBP (b) (c)		100,000		130,127
Bellis Finco PLC
4.000% 2/16/27 GBP (b) (c)		100,000		127,741
Carrefour SA
1.750% 7/15/22 EUR (b) (c)		110,000		125,972
China Mengniu Dairy Co. Ltd.
2.500% 6/17/30 (b)		400,000		396,628
Chobani LLC / Chobani Finance Corp., Inc.
4.625% 11/15/28 (b)		240,000		246,589
Danone SA
0.424% 11/03/22 EUR (b) (c)		100,000		114,418
Iceland Bondco PLC
4.625% 3/15/25 GBP (b) (c)		150,000		190,089
Mondelez International Holdings Netherlands BV
0.250% 9/09/29 EUR (b) (c)		198,000		220,068
Nestle Finance International Ltd.
0.750% 5/16/23 EUR (b) (c)		39,000		44,921
Tesco Corporate Treasury Services PLC
0.875% 5/29/26 EUR (b) (c)		150,000		173,608
Yili Holding Investment Co.
1.625% 11/19/25 (b)		566,000		556,344
				2,510,057
Forest Products & Paper — 0.2%
Celulosa Arauco y Constitucion SA
4.200% 1/29/30 (b)		1,500,000		1,601,250
Gas — 0.2%
APT Pipelines Ltd.
4.250% 7/15/27 (b)		885,000		974,624
NiSource, Inc.
1.700% 2/15/31		370,000		345,832
				1,320,456
Hand & Machine Tools — 0.0%
IMA Industria Macchine Automatiche SpA
3.750% 1/15/28 EUR (b) (c)		100,000		112,859

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

	Principal Amount		Value
Health Care – Products — 0.4%
Abbott Ireland Financing DAC
0.875% 9/27/23 EUR (b) (c)	$	111,000	$	128,759
Baxter International, Inc.
2.272% 12/01/28 (b)		345,000		347,808
2.539% 2/01/32 (b)		470,000		475,369
Becton Dickinson Euro Finance Sarl
0.334% 8/13/28 EUR (c)		100,000		111,844
0.632% 6/04/23 EUR (c)		109,000		125,240
1.213% 2/12/36 EUR (c)		100,000		110,952
Medtronic Global Holdings SCA
0.375% 3/07/23 EUR (c)		160,000		183,481
0.375% 10/15/28 EUR (c)		100,000		113,668
Mozart Debt Merger Sub
3.875% 4/01/29 (b)		345,000		343,782
PerkinElmer, Inc.
1.900% 9/15/28		410,000		400,627
2.250% 9/15/31		220,000		214,172
3.300% 9/15/29		195,000		206,575
Thermo Fisher Scientific, Inc.
0.125% 3/01/25 EUR (c)		240,000		273,521
0.875% 10/01/31 EUR (c)		240,000		275,479
2.375% 4/15/32 EUR (c)		100,000		130,300
				3,441,577
Health Care – Services — 0.6%
CAB SELAS
3.375% 2/01/28 EUR (b) (c)		135,000		153,492
Centene Corp.
2.450% 7/15/28		230,000		226,550
2.500% 3/01/31		485,000		472,155
2.625% 8/01/31		315,000		308,700
3.375% 2/15/30		515,000		525,408
4.250% 12/15/27		570,000		594,225
4.625% 12/15/29		875,000		943,653
Fresenius Medical Care AG & Co. KGaA
0.250% 11/29/23 EUR (b) (c)		72,000		82,396
Humana, Inc.
2.150% 2/03/32		210,000		203,307
4.875% 4/01/30		645,000		756,490

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

	Principal Amount		Value
UnitedHealth Group, Inc.
2.000% 5/15/30	$	190,000	$	188,826
				4,455,202
Holding Company – Diversified — 0.0%
CK Hutchison Finance 16 Ltd.
1.250% 4/06/23 EUR (b) (c)		111,000		128,500
Insurance — 0.6%
AIA Group Ltd.
3.900% 4/06/28 (b)		640,000		706,525
Allianz SE 10 mo. EURIBOR ICE Swap + 3.200%
3.375% VRN EUR (b) (c) (e)		400,000		488,835
American International Group, Inc.
5.000% 4/26/23 GBP (b) (c)		150,000		213,066
AmWINS Group, Inc.
4.875% 6/30/29 (b)		30,000		30,300
Berkshire Hathaway Finance Corp.
2.375% 6/19/39 GBP (c)		300,000		422,435
Berkshire Hathaway, Inc.
0.750% 3/16/23 EUR (c)		160,000		183,991
CNO Financial Group, Inc.
5.250% 5/30/25		217,000		239,584
CNP Assurances
1.875% 10/20/22 EUR (b) (c)		100,000		115,592
Equitable Holdings, Inc.
4.350% 4/20/28		610,000		684,324
Hannover Rueck SE 3 mo. EURIBOR + 3.000%
1.750% VRN 10/08/40 EUR (b) (c)		300,000		348,647
Legal & General Group PLC 5 Year UK Gilt + 4.580%
5.375% VRN 10/27/45 GBP (b) (c)		185,000		277,661
Marsh & McLennan Cos., Inc.
2.250% 11/15/30		185,000		184,816
MGIC Investment Corp.
5.250% 8/15/28		95,000		99,750
Trinity Acquisition PLC
4.400% 3/15/26		545,000		596,494
XLIT Ltd. 3 mo. EURIBOR + 2.900%
3.250% VRN 6/29/47 EUR (c)		100,000		124,923
				4,716,943

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

	Principal Amount		Value
Internet — 0.5%
Adevinta ASA
3.000% 11/15/27 EUR (b) (c)	$	100,000	$	116,569
Baidu, Inc.
2.875% 7/06/22		710,000		716,017
3.625% 7/06/27		200,000		214,390
4.375% 3/29/28		530,000		586,703
Booking Holdings, Inc.
2.150% 11/25/22 EUR (c)		100,000		115,658
MercadoLibre, Inc.
3.125% 1/14/31 (d)		200,000		189,002
Netflix, Inc.
4.625% 5/15/29 EUR (c)		470,000		667,537
Tencent Holdings Ltd.
1.810% 1/26/26 (b)		400,000		398,944
3.575% 4/11/26 (b)		550,000		586,020
United Group BV
4.625% 8/15/28 EUR (b) (c)		100,000		113,698
				3,704,538
Investment Companies — 0.1%
Criteria Caixa SA
1.500% 5/10/23 EUR (b) (c)		100,000		116,196
JAB Holdings BV
2.000% 5/18/28 EUR (b) (c)		300,000		364,658
				480,854
Iron & Steel — 0.0%
ABJA Investment Co. Pte Ltd.
5.450% 1/24/28 (b)		200,000		218,511
Leisure Time — 0.1%
Carnival Corp.
4.000% 8/01/28 (b)		185,000		183,612
Deuce Finco Plc
5.500% 6/15/27 GBP (b) (c)		100,000		134,363
Pinnacle Bidco PLC
5.500% 2/15/25 EUR (b) (c)		100,000		116,184
Royal Caribbean Cruises Ltd.
10.875% 6/01/23 (b)		155,000		169,337

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

	Principal Amount		Value
9.125% 6/15/23 (b)	$	30,000	$	31,725
				635,221
Lodging — 0.0%
Las Vegas Sands Corp.
3.200% 8/08/24		130,000		132,378
3.500% 8/18/26		210,000		212,674
				345,052
Machinery – Diversified — 0.1%
Highland Holdings Sarl
0.318% 12/15/26 EUR (c)		122,000		138,551
TK Elevator Midco GmbH
4.375% 7/15/27 EUR (b) (c)		100,000		117,550
TK Elevator US Newco, Inc.
5.250% 7/15/27 (b)		285,000		299,606
				555,707
Media — 0.8%
Altice Financing SA
4.250% 8/15/29 EUR (b) (c)		100,000		111,231
Bertelsmann SE & Co. KGaA
2.625% 8/02/22 EUR (b) (c)		100,000		115,810
CCO Holdings LLC/CCO Holdings Capital Corp.
4.250% 2/01/31 (b)		295,000		297,590
5.375% 6/01/29 (b)		80,000		86,331
Charter Communications Operating LLC/Charter Communications Operating Capital
2.250% 1/15/29		355,000		346,680
2.300% 2/01/32		270,000		256,607
2.800% 4/01/31		1,060,000		1,048,695
4.200% 3/15/28		485,000		531,256
4.800% 3/01/50		145,000		162,879
5.125% 7/01/49		215,000		250,186
5.750% 4/01/48		45,000		56,287
6.484% 10/23/45		105,000		143,789
Comcast Corp.
2.887% 11/01/51 (b)		1,135,000		1,102,051
3.250% 11/01/39		835,000		883,286
DISH DBS Corp.
5.750% 12/01/28 (b)		180,000		181,800

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

	Principal Amount		Value
Sirius XM Radio, Inc.
4.000% 7/15/28 (b)	$	215,000	$	216,202
Summer BidCo BV
9.000% 11/15/25 EUR (b) (c)		262,188		304,470
TDF Infrastructure SASU
2.875% 10/19/22 EUR (b) (c)		100,000		115,668
Ziggo BV
2.875% 1/15/30 EUR (b) (c)		100,000		113,281
2.875% 1/15/30 EUR (b) (c)		100,000		113,281
				6,437,380
Mining — 0.1%
Arconic Corp.
6.125% 2/15/28 (b)		165,000		175,593
Constellium SE
4.250% 2/15/26 EUR (b) (c)		200,000		229,453
Hudbay Minerals, Inc.
6.125% 4/01/29 (b)		200,000		212,000
				617,046
Miscellaneous - Manufacturing — 0.2%
Siemens Financieringsmaatschappij NV
0.010% 2/20/23 EUR (b) (c)		100,000		114,269
0.375% 9/06/23 EUR (b) (c)		107,000		123,248
1.700% 3/11/28 (b)		250,000		248,009
2.150% 3/11/31 (b)		800,000		798,060
				1,283,586
Oil & Gas — 1.2%
Aker BP ASA
2.875% 1/15/26 (b)		180,000		186,662
BP Capital Markets PLC
1.109% 2/16/23 EUR (b) (c)		150,000		173,425
2.213% 9/25/26 EUR (b) (c)		160,000		198,860
Continental Resources, Inc.
5.750% 1/15/31 (b)		160,000		188,419
Diamondback Energy, Inc.
3.250% 12/01/26		545,000		575,103
Ecopetrol SA
4.625% 11/02/31		300,000		291,660
Eni SpA

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

	Principal Amount		Value
3.250% 7/10/23 EUR (b) (c)	$	117,000	$	140,019
4.750% 9/12/28 (b)		875,000		1,008,781
EQT Corp.
5.000% 1/15/29		130,000		143,975
7.500% STEP 2/01/30		85,000		109,225
Leviathan Bond Ltd.
5.750% 6/30/23 (b)		300,000		307,608
Occidental Petroleum Corp.
8.500% 7/15/27		225,000		280,688
8.875% 7/15/30		270,000		364,500
OMV AG
0.010% 6/16/23 EUR (b) (c)		71,000		81,111
Petrobras Global Finance BV
5.600% 1/03/31		275,000		291,225
Petroleos Mexicanos
5.125% 3/15/23 EUR (b) (c)		850,000		1,003,531
PTTEP Treasury Center Co. Ltd.
2.587% 6/10/27 (b)		570,000		580,176
Reliance Industries Ltd.
3.667% 11/30/27 (b)		600,000		640,662
Thaioil Treasury Center Co. Ltd.
4.625% 11/20/28 (b)		330,000		361,808
TotalEnergies Capital International SA
2.125% 3/15/23 EUR (b) (c)		100,000		117,224
Wintershall Dea Finance BV
0.452% 9/25/23 EUR (b) (c)		100,000		114,561
Woodside Finance Ltd.
3.700% 9/15/26 (b)		2,000,000		2,128,800
				9,288,023
Packaging & Containers — 0.1%
Ardagh Metal Packaging Finance USA LLC / Ardagh Metal Packaging Finance PLC
3.000% 9/01/29 EUR (b) (c)		180,000		200,575
Graphic Packaging International LLC
2.625% 2/01/29 EUR (b) (c)		100,000		115,956
Titan Holdings II BV
5.125% 7/15/29 EUR (b) (c)		100,000		113,042
Trivium Packaging Finance BV
3.750% 8/15/26 EUR (b) (c)		100,000		115,239
				544,812

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

	Principal Amount		Value
Pharmaceuticals — 2.1%
AbbVie, Inc.
2.950% 11/21/26	$	410,000	$	432,279
3.200% 11/21/29		340,000		363,866
4.050% 11/21/39		270,000		311,232
4.250% 11/21/49		325,000		389,619
4.700% 5/14/45		530,000		659,555
4.875% 11/14/48		1,210,000		1,562,360
Astrazeneca Finance LLC
1.750% 5/28/28		445,000		442,742
2.250% 5/28/31		140,000		141,140
Bausch Health Americas, Inc.
8.500% 1/31/27 (b)		150,000		157,500
Bausch Health Cos., Inc.
4.875% 6/01/28 (b)		40,000		40,900
Bayer Capital Corp. BV
0.625% 12/15/22 EUR (b) (c)		100,000		114,555
1.250% 11/13/23 EUR (b) (c)		56,000		65,206
Becton Dickinson and Co.
1.957% 2/11/31		645,000		620,738
2.823% 5/20/30		1,610,000		1,668,126
3.020% 5/24/25 GBP (c)		150,000		212,293
3.700% 6/06/27		899,000		980,317
3.794% 5/20/50		390,000		439,209
4.669% 6/06/47		460,000		581,876
Cardinal Health, Inc.
4.368% 6/15/47		515,000		582,242
4.500% 11/15/44		100,000		113,582
4.900% 9/15/45		105,000		126,533
Cigna Corp.
3.400% 3/01/27		325,000		349,357
CVS Health Corp.
1.300% 8/21/27		450,000		436,550
1.875% 2/28/31		405,000		389,006
2.700% 8/21/40		425,000		410,517
3.625% 4/01/27		2,095,000		2,274,680
5.050% 3/25/48		1,075,000		1,410,077
GlaxoSmithKline Capital PLC
0.125% 5/12/23 EUR (b) (c)		100,000		114,516
Gruenenthal GmbH
4.125% 5/15/28 EUR (b) (c)		100,000		117,310

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

	Principal Amount		Value
Merck Financial Services GmbH
1.375% 9/01/22 EUR (b) (c)	$	48,000	$	55,047
Organon & Co. / Organon Foreign Debt Co-Issuer BV
2.875% 4/30/28 EUR (b) (c)		100,000		114,614
Roche Finance Europe BV
0.500% 2/27/23 EUR (b) (c)		92,000		105,573
Sanofi
0.500% 3/21/23 EUR (b) (c)		100,000		114,757
2.500% 11/14/23 EUR (b) (c)		100,000		118,948
Takeda Pharmaceutical Co. Ltd.
2.250% 11/21/26 EUR (b) (c)		270,000		334,842
Teva Pharmaceutical Finance Netherlands BV
6.000% 1/31/25 EUR (c)		100,000		122,389
7.125% 1/31/25		200,000		214,000
				16,688,053
Pipelines — 2.1%
Boardwalk Pipelines LP
3.400% 2/15/31		1,040,000		1,074,647
4.950% 12/15/24		1,415,000		1,533,719
Cameron LNG LLC
2.902% 7/15/31 (b)		180,000		187,614
3.302% 1/15/35 (b)		200,000		209,059
3.701% 1/15/39 (b)		150,000		161,957
Cheniere Corpus Christi Holdings LLC
3.700% 11/15/29		465,000		498,532
5.125% 6/30/27		140,000		158,057
5.875% 3/31/25		760,000		842,591
7.000% 6/30/24		290,000		320,854
Cheniere Energy Partners LP
3.250% 1/31/32 (b)		95,000		95,950
Cheniere Energy, Inc.
4.625% 10/15/28		420,000		444,150
DCP Midstream Operating LP
6.750% 9/15/37 (b)		160,000		213,800
Energy Transfer LP
2.900% 5/15/25		185,000		190,965
3.750% 5/15/30		390,000		413,665
4.500% 4/15/24		105,000		111,303
4.950% 6/15/28		160,000		180,118
5.000% 5/15/50		90,000		103,901
5.250% 4/15/29		685,000		785,244

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

	Principal Amount		Value
5.500% 6/01/27	$	355,000	$	404,967
5.875% 1/15/24		600,000		645,843
6.000% 6/15/48		780,000		971,888
6.250% 4/15/49		105,000		137,571
Gray Oak Pipeline LLC
2.000% 9/15/23 (b)		55,000		55,594
2.600% 10/15/25 (b)		170,000		170,408
3.450% 10/15/27 (b)		70,000		73,119
NuStar Logistics LP
5.750% 10/01/25		255,000		274,411
Sabine Pass Liquefaction LLC
4.500% 5/15/30		95,000		107,261
5.000% 3/15/27		290,000		325,902
5.875% 6/30/26		1,715,000		1,968,563
Tallgrass Energy Partners LP/Tallgrass Energy Finance Corp.
7.500% 10/01/25 (b)		250,000		270,625
Targa Resources Partners LP/Targa Resources Partners Finance Corp.
4.000% 1/15/32 (b)		125,000		130,625
4.875% 2/01/31		25,000		27,149
6.875% 1/15/29		240,000		268,507
Transcanada Trust 3 mo. CDOR + 3.080%
4.650% VRN 5/18/77 CAD (c)		650,000		528,062
Transcontinental Gas Pipe Line Co. LLC
4.000% 3/15/28		125,000		136,678
4.600% 3/15/48		575,000		697,373
Venture Global Calcasieu Pass LLC
3.875% 8/15/29 (b)		55,000		57,062
3.875% 11/01/33 (b)		180,000		189,036
4.125% 8/15/31 (b)		65,000		68,900
The Williams Cos., Inc.
3.750% 6/15/27		1,170,000		1,263,895
5.100% 9/15/45		660,000		813,547
				17,113,112
Private Equity — 0.1%
Blackstone Property Partners Europe Holdings SARL
0.500% 9/12/23 EUR (b) (c)		100,000		114,423
1.750% 3/12/29 EUR (b) (c)		280,000		323,854
				438,277

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

	Principal Amount		Value
Real Estate — 0.4%
ADLER Group SA
1.500% 7/26/24 EUR (b) (c)	$	100,000	$	99,334
Akelius Residential Property AB
1.750% 2/07/25 EUR (b) (c)		370,000		439,684
Country Garden Holdings Co. Ltd.
5.125% 1/17/25 (b)		250,000		237,269
Dar Al-Arkan Sukuk Co. Ltd.
6.750% 2/15/25 (b)		300,000		311,025
Howard Hughes Corp.
4.125% 2/01/29 (b)		250,000		253,338
5.375% 8/01/28 (b)		45,000		47,927
Logicor Financing Sarl
1.500% 11/14/22 EUR (b) (c)		110,000		126,496
Samhallsbyggnadsbolaget i Norden AB
1.000% 8/12/27 EUR (b) (c)		260,000		292,624
Shimao Group Holdings Ltd.
5.600% 7/15/26 (b)		400,000		246,000
Sun Hung Kai Properties Capital Market Ltd.
2.875% 1/21/30 (b)		1,150,000		1,188,701
Vonovia Finance BV
2.250% 12/15/23 EUR (b) (c)		100,000		118,989
				3,361,387
Real Estate Investment Trusts (REITS) — 2.8%
American Campus Communities Operating Partnership LP
2.850% 2/01/30		810,000		827,171
3.300% 7/15/26		405,000		426,905
3.625% 11/15/27		1,045,000		1,116,673
American Tower Corp.
0.875% 5/21/29 EUR (c)		150,000		168,733
2.300% 9/15/31		315,000		306,300
Boston Properties LP
2.900% 3/15/30		785,000		800,160
3.250% 1/30/31		765,000		800,645
Brixmor Operating Partnership LP
4.050% 7/01/30		485,000		529,738
4.125% 6/15/26		2,000,000		2,167,433
4.125% 5/15/29		160,000		177,405
Crown Castle International Corp.
2.250% 1/15/31		1,830,000		1,785,105
3.800% 2/15/28		665,000		724,109

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

	Principal Amount		Value
Digital Dutch Finco BV
0.125% 10/15/22 EUR (b) (c)	$	108,000	$	123,250
Essex Portfolio LP
1.650% 1/15/31 (d)		380,000		354,333
4.000% 3/01/29		760,000		841,404
Extra Space Storage LP
2.350% 3/15/32		775,000		754,300
GLP Capital LP/GLP Financing II, Inc.
3.350% 9/01/24		125,000		129,434
Healthcare Realty Trust, Inc.
2.050% 3/15/31		230,000		220,077
3.625% 1/15/28		850,000		915,436
Healthpeak Properties, Inc.
2.875% 1/15/31		695,000		723,515
3.500% 7/15/29		70,000		75,971
Highwoods Realty LP
3.050% 2/15/30		675,000		694,146
4.125% 3/15/28		405,000		446,580
Inmobiliaria Colonial Socimi SA
1.625% 11/28/25 EUR (b) (c)		200,000		238,359
Klepierre SA
1.000% 4/17/23 EUR (b) (c)		100,000		115,234
MGM Growth Properties Operating Partnership LP / MGP Finance Co-Issuer, Inc.
5.750% 2/01/27		55,000		62,150
Prologis LP
1.250% 10/15/30		210,000		195,515
2.250% 6/30/29 GBP (c)		150,000		212,636
Realty Income Corp.
2.200% 6/15/28		120,000		121,224
2.850% 12/15/32		580,000		602,628
3.400% 1/15/28		400,000		431,708
3.950% 8/15/27		1,850,000		2,052,521
Regency Centers LP
3.600% 2/01/27		305,000		328,900
3.700% 6/15/30		205,000		224,591
4.125% 3/15/28		815,000		909,959
SBA Tower Trust
1.840% 4/15/27 (b)		635,000		630,589
2.593% 10/15/31 (b)		515,000		521,913
Scentre Group Trust 1 / Scentre Group Trust 2
1.375% 3/22/23 EUR (b) (c)		111,000		128,289

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

	Principal Amount		Value
Simon Property Group LP
2.650% 7/15/30 (d)	$	435,000	$	443,623
				22,328,662
Retail — 0.5%
Bath & Body Works, Inc.
6.625% 10/01/30 (b)		265,000		300,112
EG Global Finance PLC
4.375% 2/07/25 EUR (b) (c)		100,000		114,135
JMH Co Ltd.
2.500% 4/09/31 (b)		599,000		602,237
Next Group PLC
3.625% 5/18/28 GBP (b) (c)		250,000		365,705
PetSmart, Inc. / PetSmart Finance Corp.
4.750% 2/15/28 (b)		255,000		261,694
QVC, Inc.
4.375% 3/15/23		1,750,000		1,802,500
Ross Stores, Inc.
1.875% 4/15/31		495,000		475,096
				3,921,479
Savings & Loans — 0.0%
Nationwide Building Society
3 mo. EURIBOR + .930% 1.500% VRN 3/08/26 EUR (b) (c)		140,000		165,508
5 year EUR Swap + 1.500% 2.000% VRN 7/25/29 EUR (b) (c)		150,000		176,955
				342,463
Semiconductors — 0.4%
Asml Holding NV
0.625% 7/07/22 EUR (b) (c)		100,000		114,156
1.625% 5/28/27 EUR (b) (c)		100,000		122,618
Infineon Technologies AG
1.125% 6/24/26 EUR (b) (c)		400,000		471,094
Micron Technology, Inc.
4.185% 2/15/27		277,000		303,345
4.975% 2/06/26		435,000		482,981
NXP BV / NXP Funding LLC
5.350% 3/01/26 (b)		1,115,000		1,260,327
NXP BV / NXP Funding LLC / NXP USA, Inc.
2.700% 5/01/25 (b)		45,000		46,502
3.150% 5/01/27 (b)		95,000		99,959

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

	Principal Amount		Value
TSMC Global Ltd.
1.000% 9/28/27 (b)	$	620,000	$	585,671
				3,486,653
Software — 0.1%
Fidelity National Information Services, Inc.
0.125% 12/03/22 EUR (c)		109,000		124,477
0.750% 5/21/23 EUR (c)		110,000		126,582
Fiserv, Inc.
3.000% 7/01/31 GBP (c)		250,000		362,787
Oracle Corp.
2.300% 3/25/28		355,000		354,142
SAP SE
1.125% 2/20/23 EUR (b) (c)		106,000		122,262
				1,090,250
Telecommunications — 2.6%
Altice France SA
3.375% 1/15/28 EUR (b) (c)		135,000		149,340
5.500% 1/15/28 (b)		290,000		287,468
America Movil SAB de CV
5.750% 6/28/30 GBP (c)		140,000		243,508
AT&T, Inc.
1.600% 5/19/28 EUR (c)		200,000		240,578
1.650% 2/01/28		415,000		406,546
2.050% 5/19/32 EUR (c)		100,000		123,688
2.250% 2/01/32		1,250,000		1,209,389
2.300% 6/01/27		450,000		458,106
2.500% 3/15/23 EUR (c)		113,000		131,979
2.550% 12/01/33		480,000		470,119
2.750% 6/01/31		825,000		842,645
4.300% 2/15/30		275,000		309,798
British Telecommunications PLC
1.125% 3/10/23 EUR (b) (c)		111,000		128,079
Chorus Ltd.
1.125% 10/18/23 EUR (b) (c)		100,000		116,253
CK Hutchison Group Telecom Finance SA
0.375% 10/17/23 EUR (b) (c)		109,000		124,746
Deutsche Telekom International Finance BV
0.625% 4/03/23 EUR (b) (c)		112,000		128,899
4.250% 7/13/22 EUR (b) (c)		80,000		93,293

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

	Principal Amount		Value
HKT Capital No 4 Ltd.
3.000% 7/14/26 (b)	$	800,000	$	834,610
NBN Co., Ltd.
2.625% 5/05/31 (b)		480,000		482,267
NTT Finance Corp.
1.591% 4/03/28 (b)		765,000		747,956
Ooredoo International Finance Co.
2.625% 4/08/31 (b)		225,000		225,844
Orange SA
0.750% 9/11/23 EUR (b) (c)		100,000		115,541
0.875% 2/03/27 EUR (b) (c)		200,000		234,656
PLT VII Finance Sarl
4.625% 1/05/26 EUR (b) (c)		100,000		116,127
Sprint Capital Corp.
6.875% 11/15/28		250,000		316,250
T-Mobile USA, Inc.
3.750% 4/15/27		2,560,000		2,773,931
Tele2 AB
0.750% 3/23/31 EUR (b) (c)		130,000		144,589
Telefonica Emisiones SA
2.242% 5/27/22 EUR (b) (c)		200,000		230,062
3.987% 1/23/23 EUR (b) (c)		100,000		119,038
Telstra Corp. Ltd.
3.500% 9/21/22 EUR (b) (c)		114,000		133,407
Verizon Communications, Inc.
1.300% 5/18/33 EUR (c)		390,000		454,000
2.100% 3/22/28		365,000		365,990
2.355% 3/15/32 (b)		590,000		582,059
2.550% 3/21/31		565,000		570,663
2.650% 11/20/40		530,000		505,077
2.987% 10/30/56		2,595,000		2,467,092
4.329% 9/21/28		520,000		591,177
4.750% 11/01/41		165,000		204,502
Vmed O2 UK Financing I PLC
4.500% 7/15/31 GBP (b) (c)		155,000		209,015
4.500% 7/15/31 GBP (b) (c)		150,000		202,273
4.750% 7/15/31 (b)		305,000		308,813
Vodafone Group PLC
1.750% 8/25/23 EUR (b) (c)		113,000		132,946
4.875% 6/19/49		700,000		885,742
5.250% 5/30/48		848,000		1,108,103
				20,526,164

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

	Principal Amount		Value
Toys, Games & Hobbies — 0.0%
Hasbro, Inc.
3.550% 11/19/26	$	250,000	$	268,188
Transportation — 0.2%
Canadian Pacific Railway Co.
3.100% 12/02/51		370,000		378,875
Deutsche Post AG
2.750% 10/09/23 EUR (b) (c)		62,000		74,323
Guangzhou Metro Investment Finance BVI Ltd.
2.310% 9/17/30 (b)		600,000		568,537
InPost SA
2.250% 7/15/27 EUR (b) (c)		100,000		111,060
SF Holding Investment Ltd.
2.875% 2/20/30 (b)		570,000		564,266
				1,697,061
Water — 0.0%
Veolia Environnement SA
0.314% 10/04/23 EUR (b) (c)		100,000		114,739
TOTAL CORPORATE DEBT (Cost $237,766,720)				241,602,921
MUNICIPAL OBLIGATIONS — 0.1%
Commonwealth of Puerto Rico, General Obligation
8.000% 7/01/35		600,000		532,500
TOTAL MUNICIPAL OBLIGATIONS (Cost $483,000)				532,500
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 9.6%
Auto Floor Plan Asset-Backed Securities — 0.1%
Ford Credit Floorplan Master Owner Trust A, Series 2020-2, Class B
1.320% 9/15/27		410,000		408,046
GMF Floorplan Owner Revolving Trust, Series 2020-2, Class C
1.310% 10/15/25 (b)		290,000		289,247
Navistar Financial Dealer Note Master Trust, Series 2020-1, Class C, 1 mo. USD LIBOR + 2.150%
2.252% FRN 7/25/25 (b)		270,000		271,669
				968,962

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

	Principal Amount		Value
Automobile Asset-Backed Securities — 0.4%
AmeriCredit Automobile Receivables Trust, Series 2020-3, Class D
1.490% 9/18/26	$	275,000	$	275,206
GM Financial Automobile Leasing Trust, Series 2020-3, Class C
1.110% 10/21/24		305,000		305,799
Santander Bank NA - SBCLN, Series 2021-1A, Class B
1.833% 12/15/31 (b)		250,000		249,757
Santander Consumer Auto Receivables Trust, Series 2021-AA, Class D
1.570% 1/15/27 (b)		735,000		726,369
Santander Retail Auto Lease Trust
Series 2021-A, Class D, 1.380% 3/22/27 (b)		715,000		706,427
Series 2019-B, Class D, 3.310% 6/20/24 (b)		715,000		724,444
World Omni Auto Receivables Trust, Series 2018-B, Class B
3.170% 1/15/25		200,000		201,925
				3,189,927
Commercial Mortgage-Backed Securities — 2.8%
Austin Fairmont Hotel Trust, Series 2019-FAIR, Class B, 1 mo. USD LIBOR + 1.250%
1.360% FRN 9/15/32 (b)		235,000		233,835
Aventura Mall Trust, Series 2018-AVM, Class A,
4.112% VRN 7/05/40 (b) (f)		380,000		422,082
BANK, Series 2018-BNK13, Class A5,
4.217% VRN 8/15/61 (f)		415,000		468,566
Barclays Commercial Mortgage Trust, Series 2019-BWAY, Class D, 1 mo. USD LIBOR + 2.160%
2.270% FRN 11/15/34 (b)		245,000		238,334
Benchmark Mortgage Trust
Series 2018-B1, Class AM, 3.878% VRN 1/15/51 (f)		290,000		313,778
Series 2018-B3, Class AS, 4.195% VRN 4/10/51 (f)		375,000		413,347
Series 2018-B8, Class A5, 4.232% 1/15/52		620,000		702,629
BX Commercial Mortgage Trust 2021-21M, Series 2021-21M, Class C, 1 mo. USD LIBOR + 1.177%
1.287% FRN 10/15/36 (b)		340,000		335,750
BX Trust
Series 2021-LGCY, Class C, 1 mo. USD LIBOR + 1.004% 1.114% FRN 10/15/23 (b)		385,000		380,831
Series 2021-ARIA, Class B, 1 mo. USD LIBOR + 1.297% 1.407% FRN 10/15/36 (b)		475,000		473,814
Cantor Commercial Real Estate Lending, Series 2019-CF2, Class B
3.267% 11/15/52		295,000		306,073
Citigroup Commercial Mortgage Trust

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

	Principal Amount		Value
Series 2013-375P, Class D, 3.518% VRN 5/10/35 (b) (f)	$	315,000	$	315,427
Series 2013-375P, Class C, 3.518% VRN 5/10/35 (b) (f)		390,000		392,832
Series 2017-C4, Class AS, 3.764% 10/12/50		520,000		551,755
Cold Storage Trust, Series 2020-ICE5, Class C, 1 mo. USD LIBOR + 1.650%
1.760% FRN 11/15/37 (b)		285,067		284,088
Commercial Mortgage Pass-Through Certificates, Series 2015-CR26, Class B,
4.478% VRN 10/10/48 (f)		627,000		670,473
Commercial Mortgage Trust, Series 2015-LC23, Class AM,
4.158% VRN 10/10/48 (f)		1,650,000		1,750,832
Credit Suisse Mortgage Trust
Series 2020-NET, Class A, 2.257% 8/15/37 (b)		305,000		307,423
Series 2020-NET, Class C, 3.526% 8/15/37 (b)		480,000		490,767
CSAIL Commercial Mortgage Trust
Series 2019-C17, Class A4, 2.763% 9/15/52		655,000		675,136
Series 2019-C17, Class AS, 3.278% 9/15/52		285,000		300,304
DC Office Trust, Series 2019-MTC, Class D,
3.072% VRN 9/15/45 (b) (f)		520,000		503,602
Great Wolf Trust
Series 2019-WOLF, Class A, 1 mo. USD LIBOR + 1.034% 1.144% FRN 12/15/36 (b)		710,000		708,673
Series 2019-WOLF, Class C, 1 mo. USD LIBOR + 1.633% 1.743% FRN 12/15/36 (b)		435,000		432,285
Series 2019-WOLF, Class D, 1 mo. USD LIBOR + 1.933% 2.043% FRN 12/15/36 (b)		820,000		809,762
GS Mortgage Securities Trust
Series 2019-GSA1, Class B, 3.511% 11/10/52		870,000		905,593
Series 2015-GC28, Class AS, 3.759% 2/10/48		400,000		420,183
Hilton Orlando Trust, Series 2018-ORL, Class B, 1 mo. USD LIBOR + 1.200%
1.310% FRN 12/15/34 (b)		715,000		710,090
Independence Plaza Trust, Series 2018-INDP, Class A
3.763% 7/10/35 (b)		845,000		872,868
InTown Hotel Portfolio Trust, Series 2018-STAY, Class C, 1 mo. USD LIBOR + 1.500%
1.610% FRN 1/15/33 (b)		500,000		498,774
JP Morgan Chase Commercial Mortgage Securities Trust, Series 2018-WPT, Class AFX
4.248% 7/05/33 (b)		115,000		119,292
Manhattan West, Series 2020-1MW, Class D,
2.335% VRN 9/10/39 (b) (f)		290,000		279,258
Morgan Stanley Capital I Trust, Series 2018-H4, Class A4
4.310% 12/15/51		1,015,000		1,151,516

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

	Principal Amount		Value
VNO Mortgage Trust,
3.903% VRN 1/10/35 (b) (f)	$	750,000	$	761,754
Wells Fargo Commercial Mortgage Trust
Series 2021-SAVE, Class C, 1 mo. USD LIBOR + 1.800% 1.910% FRN 2/15/40 (b)		368,154		368,387
Series 2019-JWDR, Class A, 2.501% VRN 9/15/31 (b) (f)		710,000		705,407
Series 2014-LC18, Class AS, 3.808% 12/15/47		1,695,000		1,750,847
Series 2017-C39, Class B, 4.025% 9/15/50		1,010,000		1,072,844
				22,099,211
Other Asset-Backed Securities — 3.0%
Applebee's Funding LLC/IHOP Funding LLC, Series 2019-1A, Class A2I
4.194% 6/05/49 (b)		678,150		684,019
Ballyrock CLO 15 Ltd., Series 2021-1A, Class A1, 3 mo. USD LIBOR + 1.060%
1.184% FRN 4/15/34 (b)		495,000		492,056
Bayview Mortgage Fund IV Trust, Series 2017-RT3, Class A,
3.500% VRN 1/28/58 (b) (f)		362,400		359,296
Benefit Street Partners CLO Ltd.
Series 2020-20A, Class AR, 3 mo. USD LIBOR + 1.170% 1.313% FRN 7/15/34 (b)		470,000		469,999
Series 2021-25A, Class B, 3 mo. USD LIBOR + 1.700% 1.943% FRN 1/15/35 (b)		260,000		259,488
Bluemountain CLO Ltd., Series 2015-2A, Class A1R, 3 mo. USD LIBOR + .930%
1.052% FRN 7/18/27 (b)		125,738		125,747
CBAM Ltd., Series 2019-9A, Class A, 3 mo. USD LIBOR + 1.280%
1.404% FRN 2/12/30 (b)		1,230,000		1,230,033
CIFC Funding Ltd.
Series 2020-3A, Class A1R, 3 mo. USD LIBOR + 1.130% 1.254% FRN 10/20/34 (b)		610,000		609,644
Series 2021-3A, Class A, 3 mo. USD LIBOR + 1.140% 1.264% FRN 7/15/36 (b)		585,000		584,999
Series 2020-1A, Class A1R, 3 mo. USD LIBOR + 1.150% 1.274% FRN 7/15/36 (b)		925,000		925,141
DB Master Finance LLC, Series 2021-1A, Class A2I
2.045% 11/20/51 (b)		795,000		781,701
Driven Brands Funding LLC
Series 2020-2A, Class A2, 3.237% 1/20/51 (b)		560,763		569,877
Series 2020-1A, Class A2, 3.786% 7/20/50 (b)		271,563		279,498

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

	Principal Amount		Value
Dryden 86 CLO Ltd., Series 2020-86A, Class A1R, 3 mo. USD LIBOR + 1.100%
1.222% FRN 7/17/34 (b)	$	600,000	$	598,652
Hardee's Funding LLC
Series 2021-1A, Class A2, 2.865% 6/20/51 (b)		298,500		294,402
Series 2018-1A, Class AII, 4.959% 6/20/48 (b)		314,438		330,288
Hilton Grand Vacations Trust, Series 2020-AA, Class A
2.740% 2/25/39 (b)		247,938		254,244
HPS Loan Management, Series 11A-17, Class BR, 3 mo. USD LIBOR + 1.550%
1.694% FRN 5/06/30 (b)		265,000		263,815
Jack In The Box Funding LLC, Series 2019-1A, Class A2I
3.982% 8/25/49 (b)		535,950		539,614
Kings Park CLO Ltd., Series 2021-1A, Class A, 3 mo. USD LIBOR + 1.130%
1.478% FRN 1/21/35 (b) (g) (h)		610,000		610,000
KKR CLO Ltd., Series 36A, Class B, 3 mo. USD LIBOR + 1.700%
1.815% FRN 10/15/34 (b)		1,205,000		1,200,521
Madison Park Funding Ltd., Series 2019-33A, Class A, 3 mo. USD LIBOR + 1.330%
1.454% FRN 10/15/32 (b)		1,020,000		1,020,253
Mill City Mortgage Loan Trust, Series 2018-1, Class A1,
3.250% VRN 5/25/62 (b) (f)		240,283		244,278
Morgan Stanley Eaton Vance CLO, Series 2021-1A, Class B, 3 mo. USD LIBOR + 1.650%
1.783% FRN 10/20/34 (b)		440,000		436,769
MVW LLC, Series 2020-1A, Class C
4.210% 10/20/37 (b)		184,679		190,158
Neuberger Berman Loan Advisers CLO Ltd.
Series 2019-32A, Class AR, 3 mo. USD LIBOR + .990% 1.114% FRN 1/20/32 (b)		1,445,000		1,445,257
Series 2017-16SA, Class AR, 3 mo. USD LIBOR + 1.040% 1.164% FRN 4/15/34 (b)		765,000		760,807
Series 2021-43A, Class A, 3 mo. USD LIBOR + 1.130% 1.242% FRN 7/17/35 (b)		685,000		684,741
OCP CLO Ltd.
Series 2014-7A, Class A1RR, 3 mo. USD LIBOR + 1.120% 1.252% FRN 7/20/29 (b)		725,000		725,115
Series 2020-19A, Class AR, 3 mo. USD LIBOR + 1.150% 1.282% FRN 10/20/34 (b)		935,000		933,912
Octagon Investment Partners Ltd., Series 2016-1A, Class AR, 3 mo. USD LIBOR + 1.180%
1.304% FRN 1/24/33 (b)		1,300,000		1,297,774

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

	Principal Amount		Value
OZLM Ltd., Series 2014-7RA, Class A1R, 3 mo. USD LIBOR + 1.010%
1.132% FRN 7/17/29 (b)	$	330,759	$	330,795
Palmer Square CLO Ltd., Series 2021-2A, Class A, 3 mo. USD LIBOR + 1.150%
1.274% FRN 7/15/34 (b)		695,000		695,106
Peace Park CLO Ltd., Series 2021-1A, Class A, 3 mo. USD LIBOR + 1.130%
1.268% FRN 10/20/34 (b)		1,225,000		1,224,996
Sierra Receivables Funding LLC, Series 2020-2A, Class C
3.510% 7/20/37 (b)		209,561		213,083
Symphony CLO Ltd.
Series 2016-17A, Class AR, 3 mo. USD LIBOR + .880% 1.004% FRN 4/15/28 (b)		412,293		412,250
Series 2021-26A, Class AR, 3 mo. USD LIBOR + 1.080% 1.212% FRN 4/20/33 (b)		425,000		424,071
Towd Point Mortgage Trust
Series 2015-6, Class A1, 3.500% VRN 4/25/55 (b) (f)		8,329		8,324
Series 2018-3, Class A1, 3.750% VRN 5/25/58 (b) (f)		388,122		399,575
Wellfleet CLO Ltd., Series 2017-2A, Class A1R, 3 mo. USD LIBOR + 1.060%
1.192% FRN 10/20/29 (b)		650,000		650,263
				23,560,561
Student Loans Asset-Backed Securities — 0.7%
Navient Private Education Refi Loan Trust
Series 2020-HA, Class A, 1.310% 1/15/69 (b)		237,529		236,832
Series 2020-DA, Class A, 1.690% 5/15/69 (b)		214,553		214,632
Series 2019-FA, Class A2, 2.600% 8/15/68 (b)		446,747		452,752
Series 2020-CA, Class B, 2.830% 11/15/68 (b)		470,000		479,283
Nelnet Student Loan Trust, Series 2020-1A, Class A, 1 mo. USD LIBOR + .740%
0.843% FRN 3/26/68 (b)		243,191		244,755
SMB Private Education Loan Trust
Series 2021-A, Class APT1, 1.070% 1/15/53 (b)		587,792		570,548
Series 2020-BA, Class A1A, 1.290% 7/15/53 (b)		257,513		255,129
Series 2020-PTB, Class A2A, 1.600% 9/15/54 (b)		509,565		507,681
Series 2021-A, Class B, 2.310% 1/15/53 (b)		570,000		564,897
Series 2016-B, Class A2A, 2.430% 2/17/32 (b)		503,007		506,937
Series 2018-A, Class A2A, 3.500% 2/15/36 (b)		907,673		936,082
Series 2018-C, Class A2A, 3.630% 11/15/35 (b)		658,788		679,209
				5,648,737

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

	Principal Amount		Value
Whole Loan Collateral Collateralized Mortgage Obligations — 2.0%
Angel Oak Mortgage Trust
Series 2021-4, Class A3, 1.446% VRN 1/20/65 (b) (f)	$	428,147	$	425,556
Series 2020-6, Class A3, 1.775% VRN 5/25/65 (b) (f)		388,321		386,769
Series 2020-5, Class A3, 2.041% VRN 5/25/65 (b) (f)		127,062		127,171
Series 2020-5, Class M1, 2.970% VRN 5/25/65 (b) (f)		275,000		277,444
Series 2019-1, Class A2, 4.022% VRN 11/25/48 (b) (f)		39,736		39,712
BINOM Securitization Trust, Series 2021-INV1, Class A1,
2.034% VRN 6/25/56 (b) (f)		395,000		395,674
BRAVO Residential Funding Trust, Series 2021-NQM3, Class A1,
1.699% VRN 4/26/60 (b) (f)		776,017		778,304
CIM Trust
Series 2020-INV1, Class A2, 2.500% VRN 4/25/50 (b) (f)		547,595		550,678
Series 2021-INV1, Class A29, 2.500% VRN 7/01/51 (b) (f)		657,086		650,875
COLT Mortgage Loan Trust, Series 2020-3, Class A1,
1.506% VRN 4/27/65 (b) (f)		93,323		93,508
Ellington Financial Mortgage Trust
Series 2021-2, Class A2, 1.085% VRN 6/25/66 (b) (f)		415,980		411,557
Series 2021-3, Class A1, 1.241% VRN 9/25/66 (b) (f)		401,825		399,386
Series 2019-2, Class A1, 2.739% VRN 11/25/59 (b) (f)		244,320		246,127
Series 2020-1, Class A3, 3.999% VRN 5/25/65 (b) (f)		430,000		436,610
Flagstar Mortgage Trust
Series 2020-1INV, Class A11, 1 mo. USD LIBOR + .850% 0.952% FRN 3/25/50 (b)		115,972		116,035
Series 2018-6RR, Class 2A4, 4.000% VRN 9/25/48 (b) (f)		38,813		39,145
Galton Funding Mortgage Trust
Series 2020-H1, Class A1, 2.310% VRN 1/25/60 (b) (f)		146,475		147,704
Series 2019-H1, Class A1, 2.657% VRN 10/25/59 (b) (f)		4,273		4,295
Series 2019-H1, Class A3, 2.964% VRN 10/25/59 (b) (f)		484,990		486,939
Series 2018-1, Class A23, 3.500% VRN 11/25/57 (b) (f)		36,956		37,303
GCAT Trust, Series 2021-NQM4, Class A3,
1.556% VRN 8/25/66 (b) (f)		253,941		251,811
GMRF Mortgage Acquisition Co., Series 2019-1, Class A22,
4.000% VRN 2/25/59 (b) (f)		22,783		23,023
GS Mortgage-Backed Securities Trust
Series 2021-GR2, Class A4, 2.500% VRN 2/25/52 (b) (f)		518,572		518,648
Series 2020-INV1, Class A14, 2.962% VRN 10/25/50 (b) (f)		315,879		318,269
Homeward Opportunities Fund I Trust
Series 2020-2, Class A1, 1.657% VRN 5/25/65 (b) (f)		158,340		158,582
Series 2019-3, Class A3, 3.031% VRN 11/25/59 (b) (f)		142,999		143,022
Imperial Fund Mortgage Trust, Series 2021-NQM2, Class A1,
1.073% VRN 9/25/56 (b) (f)		270,652		268,693

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

	Principal Amount		Value
JP Morgan Mortgage Trust
Series 2020-INV1, Class A11, 1 mo. USD LIBOR + .830% 0.922% FRN 8/25/50 (b)	$	98,482	$	98,517
Series 2020-LTV1, Class B1, 3.342% VRN 6/25/50 (b) (f)		363,490		369,989
Series 2019-INV2, Class A3, 3.500% VRN 2/25/50 (b) (f)		80,213		81,163
Series 2019-INV3, Class A3, 3.500% VRN 5/25/50 (b) (f)		178,853		182,052
Series 2020-LTV1, Class A3, 3.500% VRN 6/25/50 (b) (f)		84,761		85,146
Series 2020-INV1, Class A3, 3.500% VRN 8/25/50 (b) (f)		155,499		157,893
Series 2020-5, Class B2, 3.623% VRN 12/25/50 (b) (f)		343,722		352,424
MFA Trust, Series 2021-NQM2, Class A1,
1.029% VRN 11/25/64 (b) (f)		312,046		309,685
New Residential Mortgage Loan Trust
Series 2020-NQM1, Class A1, 2.464% VRN 1/26/60 (b) (f)		186,197		187,063
Series 2021-INV2, Class A2, 2.500% VRN 9/25/51 (b) (f)		778,300		777,753
Series 2019-NQM5, Class A1, 2.710% VRN 11/25/59 (b) (f)		375,560		378,953
OBX Trust
Series 2021-NQM3, Class A1, 1.054% VRN 7/25/61 (b) (f)		395,103		391,933
Series 2020-EXP1, Class 1A8, 3.500% VRN 2/25/60 (b) (f)		359,984		366,032
Onslow Bay Financial LLC
Series 2020-EXP1, Class 2A1, 1 mo. USD LIBOR + .750% 0.852% FRN 2/25/60 (b)		247,782		248,016
Series 2020-EXP2, Class A8, 3.000% VRN 5/25/60 (b) (f)		407,218		411,634
Series 2020-INV1, Class A5, 3.500% VRN 12/25/49 (b) (f)		197,805		201,329
Series 2019-EXP3, Class 1A8, 3.500% VRN 10/25/59 (b) (f)		114,886		117,004
Series 2019-INV2, Class A25, 4.000% VRN 5/27/49 (b) (f)		174,353		177,136
Series 2019-EXP2, Class 1A3, 4.000% VRN 6/25/59 (b) (f)		144,020		146,685
Sequoia Mortgage Trust
Series 2017-CH1, Class A2, 3.500% VRN 8/25/47 (b) (f)		150,509		151,717
Series 2017-CH1, Class A13, 4.000% VRN 8/25/47 (b) (f)		187,097		188,737
Series 2018-CH3, Class A2, 4.000% VRN 8/25/48 (b) (f)		41,987		42,279
Series 2018-CH4, Class A2, 4.000% VRN 10/25/48 (b) (f)		49,989		50,292
SG Residential Mortgage Trust, Series 2019-3, Class A1,
2.703% VRN 9/25/59 (b) (f)		44,231		44,203
TRK Trust, Series 2021-INV1, Class A1,
1.153% VRN 7/25/56 (b) (f)		399,607		395,361
Verus Securitization Trust
Series 2021-5, Class A2, 1.218% VRN 9/25/66 (b) (f)		372,509		369,681
Series 2019-4, Class A1, 2.642% STEP 11/25/59 (b)		249,441		251,449
Series 2019-INV3, Class A1, 2.692% VRN 11/25/59 (b) (f)		468,069		472,297
Series 2019-3, Class A3, 3.040% STEP 7/25/59 (b)		194,582		195,337
Series 2019-INV2, Class A2, 3.117% VRN 7/25/59 (b) (f)		408,494		411,294
Series 2020-INV1, Class A3, 3.889% VRN 3/25/60 (b) (f)		100,000		102,385
Vista Point Securitization Trust

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

	Principal Amount		Value
Series 2020-1, Class A1, 1.763% VRN 3/25/65 (b) (f)	$	187,272	$	187,647
Series 2020-2, Class M1, 3.401% VRN 4/25/65 (b) (f)		350,000		355,436
				15,991,362
Whole Loan Collateral Support Collateralized Mortgage Obligations — 0.6%
Bayview MSR Opportunity Master Fund Trust
Series 2021-2, Class A20, 2.500% VRN 6/25/51 (b) (f)		1,054,083		1,041,296
Series 2021-4, Class A20, 2.500% VRN 10/25/51 (b) (f)		477,578		473,063
CIM Trust, Series 2019-INV3, Class A15,
3.500% VRN 8/25/49 (b) (f)		92,053		93,434
GS Mortgage-Backed Securities Trust, Series 2021-GR1, Class A4,
2.500% VRN 11/25/51 (b) (f)		503,065		498,309
Hundred Acre Wood Trust
2.500% VRN 7/25/51 (b) (f)		952,987		943,978
Series 2021-INV2, Class A27, 2.500% VRN 10/25/51 (b) (f)		301,440		297,961
JP Morgan Mortgage Trust
Series 2019-INV3, Class A15, 3.500% VRN 5/25/50 (b) (f)		153,969		156,419
Series 2020-LTV1, Class A15, 3.500% VRN 6/25/50 (b) (f)		36,234		36,386
MFA 2021-AEINV2 Trust, Series 2021-AEI2, Class A15,
2.500% VRN 10/25/51 (b) (f)		605,000		595,499
Onslow Bay Financial LLC, Series 2020-EXP3, Class 1A8,
3.000% VRN 1/25/60 (b) (f)		382,943		385,532
Sequoia Mortgage Trust
Series 2018-CH1, Class A19, 4.000% VRN 3/25/48 (b) (f)		141,602		143,175
Series 2018-CH2, Class A21, 4.000% VRN 6/25/48 (b) (f)		40,541		41,086
				4,706,138
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $75,839,066)				76,164,898
SOVEREIGN DEBT OBLIGATIONS — 16.0%
1Malaysia Development Berhad Global Investments Ltd.
4.400% 3/09/23 (b)		1,000,000		1,009,500
Albania Government International Bond
3.500% 10/09/25 EUR (b) (c)		160,000		189,902
3.500% 10/09/25 EUR (b) (c)		115,000		136,492
3.500% 6/16/27 EUR (b) (c)		105,000		124,145
3.500% 11/23/31 EUR (b) (c)		490,000		547,544
Australia Government International Bond
3.000% 3/21/47 AUD (b) (c)		1,550,000		1,259,185
Bonos de la Tesoreria de la Republica en pesos

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

	Principal Amount		Value
4.700% 9/01/30 CLP (b) (c)	$	3,325,000,000	$	3,713,697
5.000% 10/01/28 CLP (b) (c)		385,000,000		443,861
Bonos Tesoreria Pesos
4.500% 3/01/26 CLP (c)		445,000,000		512,899
Brazil Notas do Tesouro Nacional Serie F
10.000% 1/01/25 BRL (c)		4,471,000		752,032
Canadian Government Real Return Bond
4.000% 12/01/31 CAD (c)		4,016,167		4,644,812
Croatia Government International Bond
1.125% 6/19/29 EUR (b) (c)		465,000		539,329
1.125% 3/04/33 EUR (b) (c)		184,000		207,913
3.875% 5/30/22 EUR (b) (c)		400,000		462,768
Cyprus Government International Bond
0.010% 2/09/26 EUR (b) (c)		245,000		276,824
1.250% 1/21/40 EUR (b) (c)		45,000		51,452
1.500% 4/16/27 EUR (b) (c)		70,000		84,298
2.375% 9/25/28 EUR (b) (c)		1,177,000		1,510,732
2.750% 2/26/34 EUR (b) (c)		93,000		128,231
2.750% 5/03/49 EUR (b) (c)		114,000		169,751
3.750% 7/26/23 EUR (b) (c)		100,000		121,136
3.750% 7/26/23 EUR (b) (c)		120,000		145,364
3.875% 5/06/22 EUR (b) (c)		220,000		254,002
4.250% 11/04/25 EUR (b) (c)		10,000		13,229
4.250% 11/04/25 EUR (b) (c)		460,000		608,558
Czech Republic Government Bond
2.400% 9/17/25 CZK (b) (c)		22,450,000		992,556
Czech Republic International Bond
3.875% 5/24/22 EUR (b) (c)		460,000		531,775
Deutsche Bundesrepublik Inflation Linked Bond
0.100% 4/15/26 EUR (b) (c)		3,691,227		4,651,670
0.500% 4/15/30 EUR (b) (c)		5,009,794		7,056,691
Egypt Government International Bond
4.750% 4/11/25 EUR (b) (c)		290,000		326,863
Export Import Bank of Thailand
1.457% 10/15/25 (b)		200,000		197,928
France Government Bond OAT
0.010% 11/25/30 EUR (b) (c)		3,295,000		3,716,670
1.250% 5/25/36 EUR (b) (c)		1,872,000		2,362,724
Hellenic Republic Government Bond
0.750% 6/18/31 EUR (b) (c)		585,000		631,939
Hungary Government Bond
2.250% 4/20/33 HUF (c)		1,188,650,000		2,937,585

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

	Principal Amount		Value
Iceland Government International Bond
0.010% 4/15/28 EUR (b) (c)	$	346,000	$	385,252
Indonesia Government International Bond
3.750% 6/14/28 EUR (b) (c)		1,280,000		1,692,324
6.125% 5/15/28 IDR (c)		14,144,000,000		1,009,249
8.750% 5/15/31 IDR (c)		4,710,000,000		380,683
Ireland Government International Bond
0.200% 10/18/30 EUR (b) (c)		1,582,000		1,812,381
1.350% 3/18/31 EUR (b) (c)		1,335,000		1,692,460
1.500% 5/15/50 EUR (b) (c)		73,000		95,619
2.000% 2/18/45 EUR (b) (c)		191,000		277,353
Israel Government International Bond
1.500% 1/18/27 EUR (b) (c)		530,000		645,983
1.750% 8/31/25 ILS (c)		4,274,000		1,453,122
5.500% 1/31/42 ILS (c)		3,981,000		2,095,106
Italy Buoni Poliennali Del Tesoro
0.650% 5/15/26 EUR (b) (c)		2,827,707		3,482,074
1.600% 6/01/26 EUR (b) (c)		3,023,000		3,630,086
2.800% 3/01/67 EUR (b) (c)		1,146,000		1,473,682
Ivory Coast Government International Bond
4.875% 1/30/32 EUR (b) (c)		105,000		114,837
Japan Government Thirty Year Bond
1.700% 9/20/44 JPY (c)		298,550,000		3,235,983
2.200% 9/20/39 JPY (c)		275,600,000		3,125,807
2.500% 9/20/37 JPY (c)		427,550,000		4,945,389
Japan Government Twenty Year Bond
0.600% 6/20/37 JPY (c)		337,100,000		3,052,362
0.700% 3/20/37 JPY (c)		149,900,000		1,377,365
1.200% 12/20/34 JPY (c)		126,050,000		1,232,393
Japanese Government CPI Linked Bond
0.005% 3/10/31 JPY (c)		500,185,564		4,515,715
0.100% 3/10/24 JPY (c)		166,263,600		1,468,520
0.100% 9/10/24 JPY (c)		169,357,800		1,501,002
0.100% 3/10/25 JPY (c)		186,740,900		1,661,561
0.200% 3/10/30 JPY (c)		83,299,086		778,824
Korea National Oil Corp.
1.625% 10/05/30 (b)		440,000		417,960
Korea South-East Power Co. Ltd.
1.000% 2/03/26 (b)		400,000		389,584
Latvia Government International Bond
0.375% 10/07/26 EUR (b) (c)		2,114,000		2,438,558
Malaysia Government Bond
3.844% 4/15/33 MYR (c)		590,000		142,187

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

	Principal Amount		Value
4.642% 11/07/33 MYR (c)	$	3,255,000	$	839,685
4.736% 3/15/46 MYR (c)		5,640,000		1,429,364
4.921% 7/06/48 MYR (c)		6,645,000		1,737,182
Malaysia Government International Bond
4.065% 6/15/50 MYR (c)		3,336,000		781,606
4.935% 9/30/43 MYR (c)		325,000		85,191
Mexican Bonos
8.500% 5/31/29 MXN (c)		21,830,000		1,127,808
Morocco Government International Bond
1.375% 3/30/26 EUR (b) (c)		160,000		182,725
National Highways Authority of India
7.300% 5/18/22 INR (b) (c)		100,000,000		1,354,157
New South Wales Treasury Corp.
4.000% 5/20/26 AUD (b) (c)		680,000		547,581
4.000% 5/20/26 AUD (b) (c)		860,000		692,529
North Macedonia Government International Bond
1.625% 3/10/28 EUR (b) (c)		400,000		426,937
Norway Government Bond
3.000% 3/14/24 NOK (b) (c)		2,700,000		317,015
Philippine Government International Bond
0.250% 4/28/25 EUR (c)		125,000		141,649
Portugal Obrigacoes do Tesouro OT
4.100% 2/15/45 EUR (b) (c)		217,000		399,799
Province of Ontario Canada
3.500% 6/02/43 CAD (c)		140,000		129,810
3.500% 6/02/43 CAD (c)		62,000		57,487
Republic of South Africa Government Bond
7.000% 2/28/31 ZAR (c)		7,094,000		374,210
8.000% 1/31/30 ZAR (c)		7,265,000		420,444
10.500% 12/21/26 ZAR (c)		12,155,000		843,652
Romanian Government International Bond
1.375% 12/02/29 EUR (b) (c)		110,000		119,398
2.000% 1/28/32 EUR (b) (c)		110,000		116,155
2.000% 1/28/32 EUR (b) (c)		380,000		401,264
2.124% 7/16/31 EUR (b) (c)		642,000		696,548
2.875% 10/28/24 EUR (b) (c)		100,000		121,229
2.875% 5/26/28 EUR (b) (c)		560,000		686,135
2.875% 3/11/29 EUR (b) (c)		96,000		116,188
3.624% 5/26/30 EUR (b) (c)		670,000		826,769
Russian Federal Bond - OFZ
8.150% 2/03/27 RUB (c)		29,733,000		394,048
Serbia Government International Bond
1.500% 6/26/29 EUR (b) (c)		450,000		493,984

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

	Principal Amount		Value
2.050% 9/23/36 EUR (b) (c)	$	430,000	$	447,086
Serbia International Bond
1.000% 9/23/28 EUR (b) (c)		850,000		915,928
Serbia Treasury Bonds
4.500% 8/20/32 RSD (c)		81,410,000		804,955
Singapore Government International Bond
2.875% 7/01/29 SGD (c)		990,000		796,693
3.125% 9/01/22 SGD (c)		1,130,000		852,867
Slovenia Government International Bond
0.275% 1/14/30 EUR (b) (c)		639,000		726,637
1.500% 3/25/35 EUR (b) (c)		398,000		501,157
3.125% 8/07/45 EUR (b) (c)		237,000		394,699
5.250% 2/18/24 (b)		200,000		217,507
5.250% 2/18/24 (b)		200,000		217,507
Thailand Government International Bond
1.600% 12/17/29 THB (c)		4,400,000		129,128
2.000% 12/17/31 THB (c)		61,000,000		1,841,079
3.650% 6/20/31 THB (c)		22,344,000		769,880
United Kingdom Gilt
0.625% 6/07/25 GBP (b) (c)		2,408,000		3,253,531
0.625% 10/22/50 GBP (b) (c)		732,000		870,608
4.250% 12/07/46 GBP (b) (c)		1,119,000		2,511,020
4.750% 12/07/30 GBP (b) (c)		1,784,000		3,209,931
United Kingdom Inflation-Linked Gilt
0.750% 3/22/34 GBP (b) (c)		402,909		826,116
				126,984,356
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $132,504,113)				126,984,356
U.S. Government Agency Obligations and Instrumentalities (i) — 17.9%
Collateralized Mortgage Obligations — 0.3%
Federal Home Loan Mortgage Corp. REMICS Series 4977, Class IO 4.500% 5/25/50		317,623		50,944
Federal Home Loan Multifamily Structured Pass Through Certificates
Series 2019-K98, Class B, 3.737% VRN 10/25/52 (b) (f)		335,000		361,919
Series 2019-K736, Class B, 3.758% VRN 7/25/26 (b) (f)		585,000		624,114
Series 2018-K73, Class B, 3.852% VRN 2/25/51 (b) (f)		665,000		716,611
Series 2018-K731, Class B, 3.933% VRN 2/25/25 (b) (f)		720,000		762,854
				2,516,442

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

	Principal Amount		Value
Pass-Through Securities — 16.7%
Federal Home Loan Mortgage Corp.
Pool #SB8509 2.000% 1/01/36	$	970,573	$	995,489
Pool #RC2163 2.000% 8/01/36		287,657		295,312
Pool #RC2083 2.000% 9/01/36		470,038		482,546
Pool #RC2220 2.000% 9/01/36		515,524		529,241
Pool #RA6505 2.000% 12/01/51 (j)		1,568,500		1,567,564
Pool #QC1292 2.500% 5/01/51		20,932		21,412
Pool #QC3425 2.500% 6/01/51		279,526		286,347
Pool #QC2902 2.500% 6/01/51		51,671		53,223
Pool #QC3551 2.500% 7/01/51		23,798		24,379
Pool #QC5137 2.500% 8/01/51		69,444		71,044
Pool #QC5575 2.500% 8/01/51		87,359		89,360
Pool #SB0222 3.000% 11/01/34		208,478		220,251
Pool #ZS4693 3.000% 12/01/46		85,866		89,812
Pool #G08756 3.000% 4/01/47		36,351		38,015
Pool #SD0080 3.000% 9/01/49		162,898		172,942
Pool #SD7531 3.000% 12/01/50		192,401		202,655
Pool #SB0015 3.500% 6/01/33		194,488		205,614
Pool #U90690 3.500% 6/01/42		62,667		67,659
Pool #U99051 3.500% 6/01/43		63,351		68,298
Pool #ZT0179 3.500% 11/01/47		902,633		965,244
Pool #RA1202 3.500% 8/01/49		144,698		153,994
Pool #SD0212 3.500% 12/01/49		197,394		210,074
Pool #SD0617 3.500% 11/01/50		137,089		146,024
Pool #RA1906 4.000% 12/01/49		499,660		537,528
Pool #SD8039 4.000% 1/01/50		345,625		367,175
Pool #SD0422 4.500% 7/01/45		148,252		163,067
Pool #RA2607 4.500% 5/01/50		77,978		84,007
Pool #ZS3941 5.000% 12/01/41		49,119		55,122
Federal National Mortgage Association
Pool #CB0570 2.000% 5/01/36		1,076,716		1,104,694
Pool #CB2357 2.000% 12/01/51 (j)		2,109,486		2,108,228
Pool #BM3859 2.500% 8/01/31		116,278		120,593
Pool #BC9043 2.500% 11/01/31		363,219		377,264
Pool #BM1890 2.500% 1/01/32		89,968		93,306
Pool #BT1265 2.500% 6/01/51		613,445		628,416
Pool #BT0163 2.500% 6/01/51		67,354		69,377
Pool #BT1288 2.500% 7/01/51		521,922		534,659
Pool #CB1331 2.500% 8/01/51		812,005		829,792
Pool #FM8320 2.500% 8/01/51		90,122		92,321
Pool #CB1783 2.500% 10/01/51		2,191,486		2,245,826

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

	Principal Amount		Value
Pool #CB1866 2.500% 10/01/51	$	1,726,770	$	1,770,127
Pool #AS7056 3.000% 4/01/31		285,363		299,427
Pool #BM5111 3.000% 11/01/33		131,801		138,585
Pool #CA4885 3.000% 12/01/34		484,344		512,149
Pool #BO7256 3.000% 1/01/35		229,571		241,961
Pool #FM2547 3.000% 2/01/35		409,283		432,779
Pool #FM8540 3.000% 11/01/35		269,098		282,359
Pool #AL9412 3.000% 11/01/36		261,739		275,975
Pool #CA5597 3.000% 4/01/40		915,670		970,338
Pool #BM4221 3.000% 1/01/43		142,611		150,323
Pool #BM5468 3.000% 2/01/43		224,590		236,735
Pool #AB9248 3.000% 5/01/43		61,623		64,917
Pool #AU1629 3.000% 7/01/43		15,998		16,853
Pool #AS0406 3.000% 9/01/43		89,115		94,964
Pool #BM5469 3.000% 3/01/44		410,114		432,035
Pool #BM3380 3.000% 6/01/46		358,549		379,843
Pool #MA2670 3.000% 7/01/46		135,206		141,461
Pool #FM5500 3.000% 9/01/46		468,786		494,136
Pool #AS8295 3.000% 11/01/46		315,652		336,469
Pool #MA2806 3.000% 11/01/46		249,792		261,271
Pool #BD8462 3.000% 11/01/46		1,408,785		1,486,729
Pool #BM4896 3.000% 2/01/47		722,905		761,546
Pool #FM1000 3.000% 4/01/47		208,777		218,370
Pool #MA2956 3.000% 4/01/47		162,344		169,703
Pool #BM1418 3.000% 4/01/47		1,606,164		1,695,029
Pool #BM4744 3.000% 6/01/47		140,982		150,280
Pool #FM1572 3.000% 9/01/48		289,322		302,617
Pool #FM5499 3.000% 2/01/49		195,565		204,552
Pool #FM1445 3.000% 8/01/49		141,595		150,324
Pool #CA4108 3.000% 9/01/49		899,997		947,632
Pool #CA4794 3.000% 12/01/49		384,399		400,020
Pool #CA5337 3.000% 3/01/50		750,820		781,567
Pool #CA5540 3.000% 4/01/50		16,793		17,591
Pool #CA6314 3.000% 7/01/50		233,879		244,224
Pool #BQ1348 3.000% 8/01/50		155,413		161,809
Pool #CA6738 3.000% 8/01/50		300,461		313,001
Pool #BQ5052 3.000% 9/01/50		23,706		24,682
Pool #CA7755 3.000% 10/01/50		565,749		589,536
Pool #FM7072 3.000% 4/01/51		792,130		830,634
Pool #FM3462 3.500% 12/01/33		435,208		460,715
Pool #AS4449 3.500% 2/01/35		131,638		140,547
Pool #FM3340 3.500% 5/01/35		14,276		15,054
Pool #FM8137 3.500% 9/01/35		150,229		159,128

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

	Principal Amount		Value
Pool #MA1283 3.500% 12/01/42	$	50,617	$	54,549
Pool #MA1373 3.500% 3/01/43		78,134		84,203
Pool #MA1437 3.500% 5/01/43		74,453		80,236
Pool #MA1546 3.500% 8/01/43		175,852		189,512
Pool #AL6167 3.500% 1/01/44		702,186		756,730
Pool #AS5182 3.500% 6/01/45		425,821		455,038
Pool #BC1747 3.500% 1/01/46		1,148,298		1,222,423
Pool #BM5785 3.500% 9/01/46		114,355		122,201
Pool #BM4582 3.500% 8/01/47		130,574		140,145
Pool #BM3122 3.500% 10/01/47		1,817,315		1,949,393
Pool #MA3210 3.500% 12/01/47		42,871		45,508
Pool #CA0858 3.500% 12/01/47		65,685		69,519
Pool #MA3238 3.500% 1/01/48		834,870		882,567
Pool #BH9277 3.500% 2/01/48		463,489		489,823
Pool #CA1189 3.500% 2/01/48		194,658		205,718
Pool #FM1001 3.500% 11/01/48		56,676		60,246
Pool #FM8196 3.500% 12/01/48		928,926		987,729
Pool #FM3972 3.500% 7/01/50		322,286		341,077
Pool #FM8086 3.500% 7/01/51		140,800		149,471
Pool #BF0198 4.000% 11/01/40		132,439		143,076
Pool #MA0639 4.000% 2/01/41		413,381		447,833
Pool #AL2745 4.000% 3/01/42		617,978		672,441
Pool #BM3385 4.000% 6/01/45		699,829		756,038
Pool #FM2673 4.000% 10/01/45		1,008,109		1,092,147
Pool #AL8387 4.000% 3/01/46		991,020		1,070,617
Pool #MA3088 4.000% 8/01/47		41,022		44,086
Pool #MA3149 4.000% 10/01/47		519,309		557,125
Pool #MA3467 4.000% 9/01/48		5,455		5,804
Pool #BM5527 4.000% 10/01/48		136,370		147,280
Pool #BM5147 4.000% 10/01/48		30,926		33,770
Pool #FM3664 4.000% 3/01/49		1,090,941		1,162,882
Pool #CA3503 4.000% 5/01/49		85,795		91,151
Pool #CA4571 4.000% 11/01/49		114,191		121,275
Pool #CA4823 4.000% 12/01/49		180,515		191,714
Pool #AL0065 4.500% 4/01/41		228,432		250,466
Pool #AI1888 4.500% 5/01/41		263,335		288,736
Pool #AL0160 4.500% 5/01/41		336,478		368,935
Pool #AL6536 4.500% 3/01/45		360,183		394,701
Pool #BM4185 4.500% 9/01/46		181,678		198,862
Pool #FM2899 4.500% 11/01/46		423,628		466,273
Pool #FM5708 4.500% 5/01/47		217,560		238,546
Pool #BM3148 4.500% 11/01/47		183,442		200,471
Pool #BM4343 4.500% 5/01/48		382,357		419,837

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

	Principal Amount		Value
Pool #CA2204 4.500% 8/01/48	$	62,694	$	67,223
Pool #CA2207 4.500% 8/01/48		44,689		48,144
Pool #FM7311 4.500% 3/01/49		573,081		614,704
Pool #CA5186 4.500% 1/01/50		33,793		36,374
Pool #CA5696 4.500% 5/01/50		132,119		142,458
Pool #AD6438 5.000% 6/01/40		58,922		66,018
Pool #AL9893 5.000% 2/01/45		325,295		364,743
Pool #FM4212 5.000% 12/01/47		531,021		591,995
Pool #BM3279 5.500% 5/01/44		1,270,525		1,441,181
Pool #BM4971 6.000% 7/01/41		229,028		265,577
Government National Mortgage Association Pool #AA5821 3.000% 11/15/42		48,276		51,188
Government National Mortgage Association II
Pool #MA7649 2.500% 10/20/51		3,418,438		3,509,065
Pool #MA7767 2.500% 12/20/51 (j)		3,110,000		3,192,693
Pool #MA2600 3.000% 2/20/45		99,953		105,055
Pool #MA2825 3.000% 5/20/45		198,188		208,118
Pool #MA2891 3.000% 6/20/45		1,095,916		1,150,825
Pool #MA3662 3.000% 5/20/46		131,589		137,730
Pool #MA3802 3.000% 7/20/46		63,320		66,275
Pool #MA3873 3.000% 8/20/46		364,965		381,997
Pool #MA4195 3.000% 1/20/47		442,891		463,005
Pool #MA6144 3.000% 9/20/49		19,123		19,585
Pool #MA6209 3.000% 10/20/49		111,331		114,021
Pool #MA6399 3.000% 1/20/50		60,973		62,446
Pool #MA6531 3.000% 3/20/50		191,640		196,271
Pool #MA6589 3.000% 4/20/50		85,519		87,452
Pool #MA6757 3.000% 7/20/50		152,320		155,763
Pool #MA7473 3.000% 7/20/51		1,856,388		1,924,309
Pool #MA7650 3.000% 10/20/51		340,848		353,852
Pool #MA0318 3.500% 8/20/42		195,187		208,890
Pool #MA1012 3.500% 5/20/43		413,003		441,999
Pool #MA1090 3.500% 6/20/43		164,476		176,023
Pool #AL1773 3.500% 1/20/45		210,479		224,335
Pool #MA3310 3.500% 12/20/45		93,108		98,365
Pool #MA3597 3.500% 4/20/46		139,704		147,460
Pool #MA3663 3.500% 5/20/46		109,268		115,335
Pool #MA3736 3.500% 6/20/46		296,821		312,837
Pool #MA3803 3.500% 7/20/46		21,276		22,424
Pool #MA3937 3.500% 9/20/46		141,852		149,506
Pool #MA4004 3.500% 10/20/46		541,503		570,721
Pool #MA4382 3.500% 4/20/47		25,526		26,856
Pool #MA4586 3.500% 7/20/47		49,118		51,569

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

	Principal Amount		Value
Pool #MA4719 3.500% 9/20/47	$	17,466	$	18,338
Pool #MA4900 3.500% 12/20/47		237,697		249,111
Pool #784474 3.500% 2/20/48		200,373		213,314
Pool #MA784472 3.500% 2/20/48		352,358		379,078
Pool #785087 3.500% 2/20/48		770,019		811,567
Pool #784504 3.500% 2/20/48		150,181		159,880
Pool #784891 3.500% 4/20/48		854,867		909,542
Pool #MA7536 3.500% 8/20/51		957,293		1,000,270
Pool #MA3245 4.000% 11/20/45		202,939		218,509
Pool #MA4511 4.000% 6/20/47		131,867		140,501
Pool #MA4720 4.000% 9/20/47		477,103		507,445
Pool #MA4838 4.000% 11/20/47		118,594		126,025
Pool #MA6934 4.000% 10/20/50		1,402,800		1,476,561
Pool #MA2894 4.500% 6/20/45		188,350		206,745
Pool #MA2963 4.500% 7/20/45		71,115		78,060
Pool #MA3312 4.500% 12/20/45		3,420		3,748
Pool #MA4588 4.500% 7/20/47		368,297		396,327
Pool #MA4654 4.500% 8/20/47		55,672		59,856
Pool #MA4781 5.000% 10/20/47		395,811		432,423
Pool #MA5194 5.000% 5/20/48		85,475		91,779
Pool #BF2644 5.000% 5/20/48		4,731		5,165
Pool #MA5266 5.000% 6/20/48		599,174		642,239
Pool #BF2878 5.000% 6/20/48		16,043		17,517
Pool #MA5988 5.000% 6/20/49		214,156		228,645
Pool #MA5081 5.500% 3/20/48		66,268		72,021
Pool #MA5140 5.500% 4/20/48		48,090		52,175
Pool #MA5195 5.500% 5/20/48		155,788		168,485
Pool #MA5469 5.500% 9/20/48		554		597
Pool #MA5531 5.500% 10/20/48		14,529		15,658
Pool #MA5598 5.500% 11/20/48		66,235		71,385
Pool #MA5654 5.500% 12/20/48		211,930		228,275
Pool #MA5713 5.500% 1/20/49		54,344		58,535
Pool #MA5820 5.500% 3/20/49		51,980		55,940
Government National Mortgage Association II TBA
2.000% 5/01/51 (j)		4,470,000		4,515,398
2.500% 4/01/51 (j)		1,315,000		1,348,286
3.000% 7/01/49 (j)		3,160,000		3,271,341
3.500% 4/01/49 (j)		655,000		682,230
Uniform Mortgage Backed Securities TBA
2.000% 7/01/51 (j)		22,130,000		22,088,506
2.500% 7/01/51 (j)		15,275,000		15,601,980
3.000% 5/01/49 (j)		1,415,000		1,464,414
4.000% 2/01/49 (j)		1,245,000		1,324,272

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

	Principal Amount		Value
4.500% 6/01/48 (j)	$	2,505,000	$	2,684,264
				132,216,819
Whole Loans — 0.9%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes
Series 2021-HQA1, Class M1, SOFR30A + .700% 0.750% FRN 8/25/33 (b)		146,175		146,092
Series 2018-DNA3, Class M1, 1 mo. USD LIBOR + .750% 0.853% FRN 9/25/48 (b)		709		709
Series 2021-HQA3, Class M1, SOFR30A + .850% 0.900% FRN 9/25/41 (b)		560,000		559,652
Series 2018-DNA2, Class M1, 1 mo. USD LIBOR + .800% 0.903% FRN 12/25/30 (b)		92,427		92,442
Series 2021-HQA4, Class M1, SOFR30A + .950% 1.000% FRN 12/25/41 (b)		710,000		708,593
Series 2018-DNA1, Class M2AT, 1 mo. USD LIBOR + 1.050% 1.153% FRN 7/25/30		378,220		378,633
Series 2018-HQA1, Class M2AS, 1 mo. USD LIBOR + 1.100% 1.203% FRN 9/25/30		310,721		310,868
Series 2019, Class M2, 1 mo. USD LIBOR + 1.400% 1.503% FRN 2/25/49 (b)		389,013		390,141
Series 2021-DNA5, Class M2, SOFR30A + 1.650% 1.700% FRN 1/25/34 (b)		285,000		286,145
Series 2017-HQA3, Class M2, 1 mo. USD LIBOR + 2.350% 2.453% FRN 4/25/30		602,437		611,059
Series 2020-DNA5, Class M2, SOFR30A + 2.800% 2.850% FRN 10/25/50 (b)		454,126		457,672
Series 2015-DNA3, Class M3, 1 mo. USD LIBOR + 4.700% 4.803% FRN 4/25/28		456,581		470,753
Series 2016-HQA2, Class M3, 1 mo. USD LIBOR + 5.150% 5.253% FRN 11/25/28		682,822		706,221
Federal National Mortgage Association Connecticut Avenue Securities Trust
Series 2018-C01, Class 1ED2, 1 mo. USD LIBOR + .850% 0.953% FRN 7/25/30		618,153		618,153
Series 2017-C04, Class 2ED2, 1 mo. USD LIBOR + 1.100% 1.203% FRN 11/25/29		720,993		721,875
Series 2017-C02, Class 2ED3, 1 mo. USD LIBOR + 1.350% 1.453% FRN 9/25/29		48,322		48,722
Series 2021-R03, Class 1M2, SOFR30A + 1.650% 1.700% FRN 12/25/41 (b)		345,000		345,276

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

	Principal Amount		Value
Series 2017-C06, Class 1M2B, 1 mo. USD LIBOR + 2.650% 2.753% FRN 2/25/30	$	520,000	$	528,009
				7,381,015
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $141,393,485)				142,114,276
U.S. TREASURY OBLIGATIONS — 17.5%
U.S. Treasury Bonds & Notes — 17.5%
U.S. Treasury Bond
2.000% 11/15/41		11,405,000		11,533,306
2.000% 8/15/51		6,090,000		6,194,071
2.375% 5/15/51		10,455,000		11,526,283
U.S. Treasury Note
0.125% 5/15/23		8,480,000		8,431,298
0.125% 6/30/23		11,180,000		11,103,234
0.125% 1/15/24 (k)		15,795,000		15,594,656
0.125% 2/15/24 (d)		2,320,000		2,289,845
0.250% 3/15/24		7,210,000		7,124,110
0.250% 5/15/24		4,805,000		4,740,270
0.250% 6/15/24		17,785,000		17,525,223
0.375% 7/15/24		800,000		790,215
0.625% 10/15/24		800,000		793,745
0.875% 9/30/26		13,510,000		13,278,821
1.125% 10/31/26		11,500,000		11,432,266
1.250% 11/30/26		16,605,000		16,607,713
				138,965,056
TOTAL U.S. TREASURY OBLIGATIONS (Cost $139,723,830)				138,965,056
TOTAL BONDS & NOTES (Cost $747,425,079)				746,090,394

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

	Number of Shares		Value
MUTUAL FUNDS — 0.5%
Diversified Financial Services — 0.5%
State Street Navigator Securities Lending Government Money Market Portfolio (l)		3,973,213	$	3,973,213
TOTAL MUTUAL FUNDS (Cost $3,973,213)				3,973,213
TOTAL PURCHASED OPTIONS — 0.0% (Cost $75,761)				95,149
TOTAL LONG-TERM INVESTMENTS (Cost $751,726,746)				750,390,879
SHORT-TERM INVESTMENTS — 13.3%
Mutual Fund — 12.9%
T. Rowe Price Government Reserve Investment Fund		102,412,072		102,412,072
	Principal Amount
Repurchase Agreement — 0.2%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (m)	$	2,065,406		2,065,406
Sovereign Debt Obligation — 0.1%
Egypt Treasury Bills 0.010% 1/04/22 EGP (c)		8,100,000		515,454
U.S. Treasury Bill — 0.1%
U.S. Treasury Bill
0.101% 5/19/22 (n)		900,000		899,668
TOTAL SHORT-TERM INVESTMENTS (Cost $105,891,898)				105,892,600

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

	Principal Amount	Value
TOTAL INVESTMENTS — 107.8% (Cost $857,618,644) (o)		$	856,283,479
Other Assets/(Liabilities) — (7.8)%			(62,080,913)
NET ASSETS — 100.0%		$	794,202,566

Abbreviation Legend

CLO Collateralized Loan Obligation

FRN Floating Rate Note

IO Interest Only

REMICS Real Estate Mortgage Investment Conduits

STEP Step Up Bond

TBA To Be Announced

VRN Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) All or a portion of the security represents unsettled loan commitments at December 31, 2021 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 December 31, 2021, the aggregate market value of these securities amounted to $239,570,982 or 30.16% 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 December 31, 2021, was $5,608,178 or 0.71% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $1,762,658 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) 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 December 31, 2021.

(g) Investment was valued using significant unobservable inputs.

(h) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At December 31, 2021, these securities amounted to a value of $610,000 or 0.08% of net assets.

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

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

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

(m) Maturity value of $2,065,406. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $2,106,763.

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

(o) 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)

Put

USD Put EUR Call

UBS AG

2/25/22

1.14

11,060,000

USD

11,060,000

$

95,149

$

75,761

$

19,388

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

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
Bank of America N.A.	1/21/22	USD	880,381	CNH	5,735,769	$	(20,978)
Bank of America N.A.	1/21/22	IDR	4,903,916,712	USD	340,620		3,026
Bank of America N.A.	2/25/22	USD	129,209	GBP	96,760		(1,735)
Barclays Bank PLC	1/21/22	USD	1,151,919	CNH	7,501,872		(26,978)
Barclays Bank PLC	1/21/22	USD	504,477	TWD	13,973,000		(553)
Barclays Bank PLC	1/21/22	USD	762,257	INR	57,296,923		(7,152)
Barclays Bank PLC	1/21/22	USD	9,307,178	JPY	1,063,205,463		63,262
Barclays Bank PLC	1/21/22	USD	1,016,169	AUD	1,431,000		(25,003)
Barclays Bank PLC	2/25/22	USD	897,440	GBP	680,000		(22,799)
BNP Paribas SA	1/07/22	USD	801,451	CLP	653,198,907		35,044
BNP Paribas SA	1/07/22	CLP	1,580,823,574	USD	1,857,719		(2,918)
BNP Paribas SA	1/21/22	CNH	18,264,800	USD	2,805,181		65,078
BNP Paribas SA	1/21/22	USD	1,208,237	CAD	1,525,000		2,674
BNP Paribas SA	1/21/22	USD	1,968,674	RUB	147,057,000		14,916
BNP Paribas SA	2/25/22	EUR	397,001	USD	448,611		3,846
BNP Paribas SA	2/25/22	USD	1,513,016	SEK	13,670,000		(401)
BNP Paribas SA	3/11/22	USD	1,763,427	MYR	7,485,747		(28,314)
BNP Paribas SA	3/11/22	USD	196,255	THB	6,636,259		(2,349)
BNP Paribas SA	3/11/22	USD	506,823	CLP	430,216,404		6,986
BNP Paribas SA	4/08/22	USD	796,309	CLP	690,414,574		(2,224)
Citibank N.A.	1/12/22	USD	452,087	RSD	46,140,000		5,351
Citibank N.A.	1/14/22	CZK	21,763,239	USD	986,713		8,403
Citibank N.A.	1/14/22	MXN	23,685,492	USD	1,128,116		26,767
Citibank N.A.	1/14/22	USD	202,952	MXN	4,180,000		(861)
Citibank N.A.	1/20/22	ILS	3,222,200	USD	1,001,848		34,633
Citibank N.A.	1/20/22	USD	3,366,292	ILS	10,916,716		(145,276)
Citibank N.A.	1/21/22	CAD	1,138,000	USD	921,970		(22,343)
Citibank N.A.	1/21/22	USD	2,777,414	AUD	3,873,000		(40,519)
Citibank N.A.	1/21/22	USD	80,222	CNH	512,000		(237)
Citibank N.A.	1/21/22	USD	1,975,406	CAD	2,528,000		(23,061)
Citibank N.A.	1/21/22	USD	439,714	JPY	49,865,279		6,166
Citibank N.A.	2/18/22	USD	452,980	RSD	46,140,575		6,879
Citibank N.A.	2/25/22	USD	1,212,207	GBP	910,000		(19,288)
Citibank N.A.	2/25/22	USD	3,445,612	EUR	3,050,839		(31,387)
Citibank N.A.	3/11/22	USD	500,457	COP	1,970,950,500		19,303
Citibank N.A.	3/11/22	USD	176,286	THB	5,884,210		189
Deutsche Bank AG	1/21/22	USD	604,833	AUD	845,991		(10,696)
Deutsche Bank AG	2/25/22	USD	110,094	EUR	97,479		(1,002)
Deutsche Bank AG	3/11/22	USD	102,477	MYR	429,000		(206)

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

Goldman Sachs International	1/20/22	ILS	2,986,000	USD	946,790		13,713
Goldman Sachs International	1/21/22	USD	586,001	CNH	3,821,018		(14,461)
Goldman Sachs International	1/21/22	USD	505,179	TWD	13,973,000		149
Goldman Sachs International	1/21/22	AUD	4,117,000	USD	3,101,295		(105,833)
Goldman Sachs International	1/21/22	IDR	3,821,913,738	USD	265,468		2,357
Goldman Sachs International	1/21/22	USD	1,515,235	CAD	1,930,000		(10,494)
Goldman Sachs International	2/25/22	USD	22,903,412	EUR	19,717,786		431,316
Goldman Sachs International	3/03/22	USD	423,197	BRL	2,415,822		(4,546)
Goldman Sachs International	3/11/22	USD	500,075	COP	1,970,950,500		18,920
Goldman Sachs International	3/11/22	USD	2,079,484	THB	70,154,145		(20,031)
HSBC Bank USA	1/21/22	CNH	3,223,200	USD	495,024		11,492
HSBC Bank USA	1/21/22	USD	761,139	INR	57,296,923		(8,270)
HSBC Bank USA	1/21/22	USD	1,910	IDR	27,566,386		(21)
HSBC Bank USA	2/25/22	USD	12,526,456	GBP	9,353,466		(131,510)
HSBC Bank USA	3/11/22	MYR	67,804	USD	16,055		174
HSBC Bank USA	3/11/22	USD	1,764,840	MYR	7,485,747		(26,901)
Morgan Stanley & Co. LLC	1/07/22	USD	533,883	CLP	437,409,982		20,664
Morgan Stanley & Co. LLC	1/14/22	MXN	19,293,082	USD	914,026		26,687
Morgan Stanley & Co. LLC	1/21/22	IDR	7,863,541,860	USD	546,953		4,093
Morgan Stanley & Co. LLC	2/25/22	EUR	333,705	USD	380,737		(419)
Morgan Stanley & Co. LLC	2/25/22	USD	28,133,979	EUR	24,236,155		512,358
Morgan Stanley & Co. LLC	3/03/22	USD	423,342	BRL	2,415,822		(4,402)
Morgan Stanley & Co. LLC	3/11/22	THB	1,055,863	USD	31,482		117
Royal Bank of Canada	1/21/22	USD	4,389,823	CAD	5,457,049		75,846
State Street Bank and Trust Co.	1/14/22	HUF	31,495,000	USD	101,040		(4,067)
State Street Bank and Trust Co.	1/14/22	USD	48,027	HUF	15,008,425		1,816
State Street Bank and Trust Co.	1/21/22	CNY	516,000	USD	80,118		740
State Street Bank and Trust Co.	1/21/22	USD	351,713	NOK	2,939,186		18,066
State Street Bank and Trust Co.	1/21/22	JPY	330,899,000	USD	2,931,322		(54,360)
State Street Bank and Trust Co.	1/21/22	USD	115,276	CAD	145,095		574
State Street Bank and Trust Co.	1/21/22	USD	19,267,516	JPY	2,197,724,007		159,660
State Street Bank and Trust Co.	2/18/22	CZK	1,333,000	USD	60,127		623
State Street Bank and Trust Co.	2/18/22	USD	237,358	PLN	951,000		2,084
State Street Bank and Trust Co.	2/25/22	GBP	211,674	USD	283,770		2,686
State Street Bank and Trust Co.	2/25/22	EUR	499,000	USD	566,083		2,621
State Street Bank and Trust Co.	2/25/22	USD	2,009,960	SEK	18,130,000		2,772
State Street Bank and Trust Co.	2/25/22	USD	1,008,606	EUR	883,708		1,456
UBS AG	1/07/22	USD	1,466,724	CLP	1,187,568,101		73,335
UBS AG	1/07/22	CLP	348,676,708	USD	410,715		(1,608)
UBS AG	1/14/22	USD	1,581,431	ZAR	23,893,182		84,080
UBS AG	1/14/22	MXN	5,361,084	USD	249,117		12,285
UBS AG	1/21/22	USD	2,637,547	AUD	3,530,149		69,068
UBS AG	1/21/22	USD	97,111	JPY	11,068,263		879
UBS AG	1/21/22	USD	1,613,753	IDR	23,221,157,000		(13,494)
UBS AG	1/21/22	CAD	86,608	USD	67,729		738
UBS AG	1/21/22	RUB	147,057,000	USD	1,985,477		(31,719)
UBS AG	1/21/22	USD	969,388	CNH	6,307,341		(21,791)
UBS AG	2/18/22	CZK	17,780,255	USD	801,996		8,318
UBS AG	2/18/22	PLN	8,661,000	USD	2,117,707		24,991
UBS AG	2/18/22	USD	171,855	PLN	700,000		(1,322)
UBS AG	2/25/22	EUR	2,246,000	USD	2,556,307		3,429
UBS AG	2/25/22	USD	54,888,230	EUR	47,597,478		642,025
UBS AG	2/25/22	USD	197,272	GBP	149,000		(4,369)
UBS AG	3/11/22	USD	1,000,407	COP	3,912,794,782		45,203
UBS AG	3/11/22	USD	294,487	THB	9,903,486		(1,896)
UBS AG	3/11/22	USD	1,538,389	CLP	1,290,649,216		38,878
UBS AG	3/18/22	USD	236,656	ZAR	3,832,764		(1,374)
UBS AG	3/18/22	USD	1,662,214	SGD	2,274,246		(24,773)
UBS AG	4/08/22	USD	402,157	RUB	30,306,576		6,596
UBS AG	4/08/22	USD	405,155	CLP	348,676,708		1,876
						$	1,701,267

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

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/ Net Unrealized Appreciation/ (Depreciation)
Long
Euro-BTP	3/08/22		2	$	341,668	$	(6,926)
Australia 3 Year Treasury Bond	3/15/22		97		8,043,328		12,513
Korea 10 Year Bond	3/15/22		29		3,052,011		(20,154)
Korea 3 Year Bond	3/15/22		37		3,389,325		6,738
Canada 10 Year Bond	3/22/22		15		1,661,234		29,979
U.S. Treasury Long Bond	3/22/22		69		11,055,739		14,449
U.S. Treasury Ultra 10 Year	3/22/22		138		19,937,985		270,390
U.S. Treasury Ultra Bond	3/22/22		213		41,318,165		669,460
U.S. Treasury Note 2 Year	3/31/22		121		26,450,961		(52,164)
						$	924,285
Short
Euro-BOBL	3/08/22		13	$	(1,987,545)	$	15,527
Euro-Bund	3/08/22		7		(1,390,185)		24,452
Euro-Buxl 30 Year Bond	3/08/22		7		(1,730,801)		83,187
Euro-OAT	3/08/22		7		(1,324,442)		24,219
Euro-Schatz	3/08/22		94		(12,009,030)		19,695
U.S. Treasury Note 10 Year	3/22/22		132		(17,209,029)		(12,846)
UK Long Gilt	3/29/22		23		(3,875,244)		(13,099)
U.S. Treasury Note 5 Year	3/31/22		63		(7,615,683)		(5,840)
						$	135,295

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

Centrally Cleared Credit Default Swaps - Buy Protection
Reference Obligation/Index	Rate Paid by Fund	Payment Frequency		Termination Date		Notional Amount		Value		Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
iTraxx Europe Crossover Series 35†	5.000%		Quarterly		6/20/2026	EUR	815,000	$	(108,286)	$	(113,479)	$	5,193
iTraxx Europe Crossover Series 36†	5.000%		Quarterly		12/20/2026	EUR	3,550,000		(104,956)		(88,302)		(16,654)
iTraxx Europe Crossover Series 36†	5.000%		Quarterly		12/20/2026	EUR	1,775,000		(238,704)		(200,806)		(37,898)
								$	(451,946)	$	(402,587)	$	(49,359)

Centrally Cleared Credit Default Swap - 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)
Republic of Chile	1.000%		Quarterly		12/20/26		A1*	USD	3,735,000	$	51,887	$	40,656	$	11,231
Republic of Indonesia	1.000%		Quarterly		12/20/26		BBB*	USD	6,225,000		74,163		63,060		11,103
CDX.NA.IG Series 37†	1.000%		Quarterly		12/20/26		BBB+*	USD	7,540,000		182,864		167,024		15,840
Republic of Mexico	1.000%		Quarterly		12/20/26		Baa1*	USD	9,050,000		43,110		39,337		3,773
										$	352,024	$	310,077	$	41,947

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.		BB*		6/20/22	USD	260,000	$	893	$	(7,203)	$	8,096
Republic of Greece	1.000%		Quarterly		Bank of America N.A.		BB*		12/20/24	USD	151,000		1,203		(4,578)		5,781
Republic of Greece	1.000%		Quarterly		Bank of America N.A.		BB*		12/20/24	USD	303,000		2,415		(9,187)		11,602
Republic of Greece	1.000%		Quarterly		Bank of America N.A.		BB*		12/20/24	USD	152,000		1,211		(10,490)		11,701
Republic of Greece	1.000%		Quarterly		Bank of America N.A.		BB*		12/20/29	USD	225,000		(8,615)		(11,045)		2,430
Republic of Greece	1.000%		Quarterly		Bank of America N.A.		BB*		12/20/29	USD	225,000		(8,615)		(11,239)		2,624
Republic of Greece	1.000%		Quarterly		Barclays Bank PLC		BB*		6/20/24	USD	67,500		597		(3,879)		4,476
Republic of Greece	1.000%		Quarterly		Barclays Bank PLC		BB*		6/20/24	USD	135,000		1,194		(8,192)		9,386
Republic of Greece	1.000%		Quarterly		Barclays Bank PLC		BB*		6/20/24	USD	67,500		597		(3,879)		4,476
Republic of Greece	1.000%		Quarterly		Barclays Bank PLC		BB*		12/20/24	USD	450,000		3,586		(2,504)		6,090
Republic of Greece	1.000%		Quarterly		Citibank N.A.		BB*		6/20/25	USD	150,000		793		(9,034)		9,827
Republic of Greece	1.000%		Quarterly		Citibank N.A.		BB*		6/20/25	USD	75,000		397		(4,350)		4,747
Republic of Greece	1.000%		Quarterly		Citibank N.A.		BB*		12/20/25	USD	300,000		793		(281)		1,074
Barclays Bank PLC	1.000%		Quarterly		JP Morgan Chase Bank N.A.		A+*		6/20/24	EUR	100,000		1,928		1,278		650
Republic of Greece	1.000%		Quarterly		Morgan Stanley & Co. LLC		BB*		12/20/24	USD	134,000		1,068		(993)		2,061
Republic of Greece	1.000%		Quarterly		Morgan Stanley & Co. LLC		BB*		6/20/25	USD	94,000		497		(4,497)		4,994
												$	(58)	$	(90,073)	$	90,015

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 2.558%

Quarterly

7/17/25

CNY

30,000,000

$

39,383

$

—

$

39,383

3-Month CNREPOFIX=CFXS-Reuters

Quarterly

Fixed 2.600%

Quarterly

8/06/25

CNY

7,500,000

11,604

—

11,604

3-Month CNREPOFIX=CFXS-Reuters

Quarterly

Fixed 2.855%

Quarterly

11/24/25

CNY

26,575,000

513,217

—

513,217

3-Month CNREPOFIX=CFXS-Reuters

Quarterly

Fixed 2.605%

Quarterly

1/15/26

CNY

58,525,000

598,779

—

598,779

3-Month CNREPOFIX=CFXS-Reuters

Quarterly

Fixed 2.780%

Quarterly

6/28/26

CNY

9,775,000

175,925

—

175,925

3-Month CNREPOFIX=CFXS-Reuters

Quarterly

Fixed 2.560%

Quarterly

7/28/26

CNY

2,800,000

24,442

—

24,442

6-Month PRIBOR

Semi-Annually

Fixed 2.208%

Annually

2/13/22

CZK

78,554,000

4,406

—

4,406

Fixed 2.208%

Annually

6-Month PRIBOR

Semi-Annually

2/13/22

CZK

24,570,000

(1,377)

(19,181)

17,804

6-Month PRIBOR

Semi-Annually

Fixed 2.245%

Annually

2/20/22

CZK

71,067,000

4,605

—

4,605

6-Month PRIBOR

Semi-Annually

Fixed 2.230%

Annually

2/21/22

CZK

75,130,000

4,918

—

4,918

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

6-Month EURIBOR	Semi-Annually	Fixed -0.001%	Annually	10/20/25	EUR	1,090,000		(4,126)		—		(4,126)
6-Month EURIBOR	Semi-Annually	Fixed -0.001%	Annually	11/04/25	EUR	1,030,000		(1,604)		—		(1,604)
6-Month EURIBOR	Semi-Annually	Fixed -0.057%	Annually	5/19/28	EUR	1,060,000		(12,081)		—		(12,081)
6-Month EURIBOR	Semi-Annually	Fixed -0.101%	Annually	6/01/28	EUR	500,000		(7,452)		—		(7,452)
6-Month EURIBOR	Semi-Annually	Fixed -0.100%	Annually	6/03/28	EUR	365,000		(5,416)		—		(5,416)
6-Month EURIBOR	Semi-Annually	Fixed -0.079%	Annually	6/29/28	EUR	384,000		(5,255)		—		(5,255)
28 Day-MXN-TIIE-Banxico	Monthly	Fixed 5.499%	Monthly	5/04/27	MXN	15,000,000		(61,408)		—		(61,408)
Fixed 3.090%	Annually	6-Month WIBOR	Semi-Annually	2/20/28	PLN	1,070,000		7,540		—		7,540
Fixed 2.850%	Annually	6-Month WIBOR	Semi-Annually	4/06/28	PLN	100,000		969		—		969
Fixed 2.920%	Annually	6-Month WIBOR	Semi-Annually	5/07/28	PLN	200,000		1,902		—		1,902
Fixed 3.030%	Annually	6-Month WIBOR	Semi-Annually	5/18/28	PLN	300,000		2,410		—		2,410
Fixed 1.715%	Annually	6-Month WIBOR	Semi-Annually	9/24/29	PLN	1,700,000		50,307		—		50,307
Fixed 1.780%	Annually	6-Month WIBOR	Semi-Annually	10/22/29	PLN	823,529		23,609		—		23,609
Fixed 1.775%	Annually	6-Month WIBOR	Semi-Annually	10/22/29	PLN	1,176,471		33,824		—		33,824
Fixed 1.820%	Annually	6-Month WIBOR	Semi-Annually	11/05/29	PLN	317,460		9,074		—		9,074
Fixed 1.803%	Annually	6-Month WIBOR	Semi-Annually	11/05/29	PLN	317,460		9,166		—		9,166
Fixed 1.860%	Annually	6-Month WIBOR	Semi-Annually	11/07/29	PLN	312,699		8,768		—		8,768
Fixed 1.710%	Annually	6-Month WIBOR	Semi-Annually	12/19/29	PLN	2,500,000		78,377		—		78,377
Fixed 1.098%	Annually	6-Month WIBOR	Semi-Annually	11/12/30	PLN	1,075,000		48,026		—		48,026
Fixed 1.950%	Annually	6-Month WIBOR	Semi-Annually	5/04/31	PLN	650,000		19,146		—		19,146
							$	1,571,678	$	(19,181)	$	1,590,859

* 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.

† 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. 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

CLP Chilean Peso

CNH Offshore Chinese Yuan

CNY Chinese Yuan Renminbi

COP Colombian Peso

CZK Czech Koruna

EUR Euro

GBP British Pound

HUF Hungarian Forint

IDR Indonesian Rupiah

ILS Israeli Shekel

INR Indian Rupee

JPY Japanese Yen

MXN Mexican Peso

MYR Malaysian Ringgit

NOK Norwegian Krone

PLN Polish Zloty

RSD Serbian dinar

RUB Russian Ruble

SEK Swedish Krona

SGD Singapore Dollar

THB Thai Baht

TWD Taiwan Dollar

USD U.S. Dollar

ZAR South African Rand

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

December 31, 2021 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 96.5%
CORPORATE DEBT — 34.1%
Bermuda — 0.2%
Ooredoo International Finance Co.
2.625% 4/08/31 (a)	$	260,000	$	260,975
Brazil — 0.4%
Globo Comunicacao e Participacoes SA
4.875% 1/22/30 (a)		450,000		437,067
British Virgin Islands — 0.6%
State Grid Overseas Investment BVI Ltd.
3.500% 5/04/27 (a)		200,000		215,862
4.375% 5/22/43 (a)		300,000		376,879
				592,741
Canada — 0.2%
MEGlobal Canada ULC
5.875% 5/18/30 (a)		200,000		242,250
Cayman Islands — 4.1%
AAC Technologies Holdings, Inc.
2.625% 6/02/26 (a)		230,000		225,565
Agile Group Holdings Ltd.
5.750% 1/02/25 (a)		400,000		259,200
Cosan Overseas Ltd.
8.250% (a) (b)		100,000		102,125
Country Garden Holdings Co. Ltd.
3.300% 1/12/31 (a)		200,000		170,068
8.000% 1/27/24 (a)		200,000		200,994
CSN Inova Ventures
6.750% 1/28/28 (a)		200,000		210,052
DP World Crescent Ltd.
3.875% 7/18/29 (a)		500,000		532,500
Grupo Aval Ltd.
4.375% 2/04/30 (a)		200,000		191,554
Health & Happiness H&H International Holdings Ltd.
5.625% 10/24/24 (a)		200,000		199,578
Huazhu Group Ltd., Convertible,
3.000% 5/01/26		129,000		143,754
Kaisa Group Holdings Ltd.
11.950% 10/22/22 (a)		280,000		74,620
KSA Sukuk Ltd.
2.969% 10/29/29 (a)		310,000		325,733
Lamar Funding Ltd.
3.958% 5/07/25 (a)		500,000		497,385
Lima Metro Line 2 Finance Ltd.
5.875% 7/05/34 (a)		100,068		115,014

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

	Principal Amount		Value
Sea Ltd., Convertible,
0.250% 9/15/26	$	220,000	$	202,268
Shimao Group Holdings Ltd.
3.450% 1/11/31 (a)		725,000		428,838
Times China Holdings Ltd.
6.750% 7/08/25 (a)		300,000		204,300
Tingyi Cayman Islands Holding Corp.
1.625% 9/24/25 (a)		205,000		202,368
				4,285,916
Chile — 2.1%
AES Andes SA 5 year USD Swap + 4.644%
7.125% VRN 3/26/79 (a)		450,000		465,754
Banco Santander Chile
3.177% 10/26/31 (a)		375,000		380,625
Celulosa Arauco y Constitucion SA
5.150% 1/29/50 (a)		250,000		284,625
Corp. Nacional del Cobre de Chile
3.150% 1/15/51 (a) (c)		200,000		187,096
3.750% 1/15/31 (a) (c)		200,000		212,971
Empresa De Los Ferrocarr
3.068% 8/18/50 (a)		250,000		214,360
Empresa de Transporte de Pasajeros Metro SA
3.693% 9/13/61 (a)		200,000		194,000
4.700% 5/07/50 (a) (c)		200,000		232,502
				2,171,933
Colombia — 1.2%
Banco Davivienda SA 10 year CMT + 5.097%
6.650% VRN (a) (b)		200,000		203,000
Banco de Bogota SA
6.250% 5/12/26 (a)		250,000		270,000
Bancolombia SA 5 year CMT + 2.944%
4.625% VRN 12/18/29		325,000		325,000
Ecopetrol SA
4.625% 11/02/31		110,000		106,942
5.875% 5/28/45		400,000		382,504
				1,287,446
Hong Kong — 0.2%
Lenovo Group Ltd.
3.421% 11/02/30 (a)		200,000		201,785
India — 1.3%
Adani International Container Terminal Pvt Ltd.
3.000% 2/16/31 (a)		539,000		519,702
Adani Ports & Special Economic Zone Ltd.
4.200% 8/04/27 (a)		200,000		207,585
4.375% 7/03/29 (a)		200,000		208,760
Bharti Airtel Ltd.
3.250% 6/03/31 (a)		400,000		404,714
				1,340,761
Indonesia — 1.5%
Bank Negara Indonesia Persero Tbk PT
3.750% 3/30/26 (a)		413,000		417,244

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

	Principal Amount		Value
Pertamina Persero PT
5.625% 5/20/43 (a)	$	400,000	$	472,823
6.000% 5/03/42 (a)		200,000		244,420
Perusahaan Perseroan Persero PT Perusahaan Listrik Negara
4.000% 6/30/50 (a)		200,000		194,130
6.150% 5/21/48 (a)		200,000		246,770
				1,575,387
Ireland — 1.0%
Gtlk Europe Capital DAC
5.950% 4/17/25 (a)		300,000		316,840
GTLK Europe DAC
5.125% 5/31/24 (a)		300,000		312,600
LCPR Senior Secured Financing DAC
5.125% 7/15/29 (a)		400,000		402,000
				1,031,440
Israel — 1.0%
ICL Group Ltd.
6.375% 5/31/38 (a)		200,000		256,500
Israel Chemicals Ltd.
6.375% 5/31/38 (a)		150,000		192,375
Israel Electric Corp. Ltd.
4.250% 8/14/28 (a)		250,000		274,475
Leviathan Bond Ltd.
6.125% 6/30/25 (a)		300,000		316,596
				1,039,946
Jamaica — 0.1%
TransJamaican Highway Ltd.
5.750% 10/10/36 (a)		147,282		146,840
Kazakhstan — 0.4%
KazMunayGas National Co. JSC
3.500% 4/14/33 (a)		400,000		414,374
Luxembourg — 0.2%
Millicom International Cellular SA
4.500% 4/27/31 (a)		200,000		201,502
Mauritius — 0.2%
HTA Group Ltd/Mauritius
7.000% 12/18/25 (a)		200,000		208,200
Mexico — 9.3%
Axtel SAB de CV
6.375% 11/14/24 (a)		200,000		206,000
Banco Mercantil De Norte 10 year CMT + 7.760%
8.375% VRN (a) (b)		200,000		229,502
Banco Mercantil del Norte SA/Grand Cayman 5 year CMT + 4.967%
6.750% VRN (a) (b)		200,000		207,102
Banco Santander Mexico SA Institucion de Banca Multiple Grupo Financiero Santand
5.375% 4/17/25 (a)		285,000		311,009
BBVA Bancomer SA 5 year CMT + 2.650%
5.125% VRN 1/18/33 (a)		600,000		615,756

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

	Principal Amount		Value
Cemex SAB de CV
5.450% 11/19/29 (a)	$	200,000	$	214,250
Cometa Energia SA de CV
6.375% 4/24/35 (a)		359,600		409,494
Controladora Mabe SA de CV
5.600% 10/23/28 (a)		250,000		284,375
Industrias Penoles SAB de CV
4.750% 8/06/50 (a)		200,000		218,502
Infraestructura Energetica Nova SAB de CV
4.875% 1/14/48 (a)		300,000		303,000
Mexico City Airport Trust
5.500% 7/31/47 (a)		1,542,000		1,544,267
Petroleos Mexicanos
4.500% 1/23/26		500,000		505,750
5.625% 1/23/46		125,000		103,120
6.500% 3/13/27		1,200,000		1,280,208
6.500% 6/02/41		3,635,000		3,261,086
				9,693,421
Netherlands — 0.2%
Petrobras Global Finance BV
5.500% 6/10/51		185,000		171,587
Oman — 0.2%
Bank Muscat SAOG
4.750% 3/17/26 (a)		200,000		206,100
Panama — 0.7%
Aeropuerto Internacional de Tocumen SA
4.000% 8/11/41 (a)		200,000		203,877
Banco General SA 10 year CMT + 3.665%
5.250% VRN (a) (b)		200,000		202,502
Banco Nacional de Panama
2.500% 8/11/30 (a)		310,000		290,628
				697,007
Paraguay — 0.2%
Telfon Celuar Del Paragu SA
5.875% 4/15/27 (a)		200,000		207,000
Peru — 0.2%
Consorcio Transmantaro SA
4.700% 4/16/34 (a)		200,000		219,752
Philippines — 1.1%
Globe Telecom, Inc.
3.000% 7/23/35 (a)		400,000		365,482
International Container Terminal Services, Inc.
4.750% 6/17/30 (a)		400,000		436,997
Manila Water Co., Inc.
4.375% 7/30/30 (a)		300,000		310,515
				1,112,994
Qatar — 0.7%
Qatar Energy
2.250% 7/12/31 (a)		270,000		267,454

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

	Principal Amount		Value
3.125% 7/12/41 (a)	$	450,000	$	454,777
				722,231
Saudi Arabia — 1.4%
Saudi Arabian Oil Co.
3.500% 4/16/29 (a)		550,000		587,812
4.250% 4/16/39 (a)		800,000		901,725
				1,489,537
Sri Lanka — 0.2%
SriLankan Airlines Ltd.
7.000% 6/25/24 (a)		300,000		165,978
Thailand — 0.9%
Bangkok Bank PCL 5 year CMT + 1.900%
3.733% VRN 9/25/34 (a)		375,000		383,228
Bangkok Bank PCL/Hong Kong 5 year CMT + 2.150%
3.466% VRN 9/23/36 (a)		200,000		200,299
Thaioil Treasury Center Co. Ltd.
3.500% 10/17/49 (a)		200,000		172,054
3.500% 10/17/49 (a)		200,000		172,054
				927,635
Ukraine — 0.3%
VF Ukraine PAT via VFU Funding PLC
6.200% 2/11/25 (a)		275,000		275,825
United Arab Emirates — 1.9%
Abu Dhabi Ports Co. PJSC
2.500% 5/06/31 (a)		400,000		400,184
Acwa Power Management And Investments One Ltd.
5.950% 12/15/39 (a)		299,430		354,824
Emirates NBD Bank PJSC 6 year USD Swap + 3.656%
6.125% VRN (a) (b)		200,000		209,290
Oztel Holdings SPC Ltd.
6.625% 4/24/28 (a)		450,000		490,122
Ruwais Power Co. PJSC
6.000% 8/31/36 (a)		400,000		527,000
				1,981,420
United Kingdom — 0.9%
Gazprom PJSC via Gaz Finance PLC
3.500% 7/14/31 (a)		450,000		433,404
HTA Group Ltd., Convertible,
2.875% 3/18/27 (a)		200,000		211,040
Ukraine Railways Via Rail Capital Markets PLC
8.250% 7/09/24 (a)		350,000		343,875
				988,319
United States — 0.7%
Citgo Holding, Inc.
9.250% 8/01/24 (a)		165,000		165,825
Kosmos Energy Ltd.
7.125% 4/04/26 (a)		200,000		193,760

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

	Principal Amount		Value
MercadoLibre, Inc., Convertible,
2.000% 8/15/28	$	65,000	$	201,584
Periama Holdings LLC/DE
5.950% 4/19/26 (a)		200,000		212,672
				773,841
Venezuela — 0.5%
Petroleos de Venezuela SA
5.375% 4/12/27 (a) (d)		900,000		34,920
6.000% 5/16/24 (a) (d)		2,400,000		93,120
6.000% 11/15/26 (a) (d)		1,750,000		67,900
8.500% 10/27/20 (a) (d)		250,000		40,000
9.000% 11/17/21 (a) (d)		4,990,000		187,125
9.750% 5/17/35 (a) (d)		150,000		5,820
12.750% 2/17/22 (a) (d)		1,500,000		58,200
				487,085
TOTAL CORPORATE DEBT (Cost $38,359,805)				35,558,295
SOVEREIGN DEBT OBLIGATIONS — 61.2%
Albania — 0.9%
Albania Government International Bond
3.500% 6/16/27 EUR (a) (e)		350,000		413,816
3.500% 11/23/31 EUR (a) (e)		500,000		558,719
				972,535
Angola — 2.5%
Angolan Government International Bond
8.000% 11/26/29 (a)		450,000		443,142
8.250% 5/09/28 (a)		975,000		978,120
9.125% 11/26/49 (a)		300,000		287,311
9.500% 11/12/25 (a)		800,000		854,736
				2,563,309
Argentina — 1.4%
Argentine Republic Government International Bond
0.500% STEP 7/09/30		571,224		199,934
1.000% 12/15/35		845,000		8,459
1.125% STEP 7/09/35		1,999,923		639,995
2.000% STEP 1/09/38		1,727,891		652,279
				1,500,667
Bahamas — 1.1%
Bahamas Government International Bond
6.000% 11/21/28 (a)		1,075,000		917,792
8.950% 10/15/32 (a)		300,000		275,628
				1,193,420
Bahrain — 2.6%
Bahrain Government International Bond
5.625% 5/18/34 (a)		1,100,000		1,042,250
7.000% 10/12/28 (a)		1,325,000		1,436,173

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

	Principal Amount		Value
7.500% 9/20/47 (a)	$	200,000	$	202,080
				2,680,503
Barbados — 0.3%
Barbados Government International Bond
6.500% 10/01/29 (a)		300,000		299,250
Benin — 0.5%
Benin Government International Bond
4.875% 1/19/32 EUR (a) (e)		440,000		489,188
Bermuda — 0.2%
Bermuda Government International Bond
3.375% 8/20/50 (a)		251,000		250,686
Brazil — 1.3%
Brazilian Government International Bond
3.875% 6/12/30		700,000		679,000
5.000% 1/27/45		740,000		693,380
				1,372,380
Chile — 0.4%
Bonos de la Tesoreria de la Republica en pesos
4.700% 9/01/30 CLP (a) (e)		285,000,000		318,317
5.800% 6/01/24 CLP (a) (e)		100,000,000		118,335
				436,652
Colombia — 1.5%
Colombia Government International Bond
3.000% 1/30/30 (c)		500,000		457,000
3.125% 4/15/31		400,000		359,092
4.125% 5/15/51 (c)		200,000		162,300
4.500% 1/28/26		200,000		209,252
5.625% 2/26/44		400,000		388,036
				1,575,680
Dominican Republic — 2.8%
Dominican Republic International Bond
4.500% 1/30/30 (a)		505,000		513,206
4.875% 9/23/32 (a)		525,000		533,531
4.875% 9/23/32 (a)		300,000		304,875
6.500% 2/15/48 (a)		300,000		318,003
6.850% 1/27/45 (a)		1,150,000		1,267,875
				2,937,490
Ecuador — 1.8%
Ecuador Government International Bond
0.000% 7/31/30 (a)		165,446		93,063
0.500% STEP 7/31/40 (a)		408,900		239,207
1.000% STEP 7/31/35 (a)		1,358,550		891,548
1.000% STEP 7/31/35 (a)		50,000		32,813
5.000% STEP 7/31/30 (a)		702,100		581,865
				1,838,496

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

	Principal Amount		Value
Egypt — 3.2%
Egypt Government International Bond
5.875% 2/16/31 (a) (c)	$	200,000	$	176,936
5.875% 2/16/31 (a)		200,000		176,936
6.588% 2/21/28 (a)		500,000		485,740
7.600% 3/01/29 (a)		300,000		297,274
7.600% 3/01/29 (a)		675,000		668,867
8.500% 1/31/47 (a)		550,000		486,728
8.500% 1/31/47 (a)		1,200,000		1,061,952
				3,354,433
El Salvador — 0.8%
El Salvador Government International Bond
5.875% 1/30/25 (a)		1,140,000		709,661
7.650% 6/15/35 (a)		100,000		56,375
7.650% 6/15/35 (a)		200,000		112,750
				878,786
Ghana — 0.4%
Ghana Government International Bond
8.125% 1/18/26 (a)		100,000		92,250
8.125% 1/18/26 (a)		400,000		369,000
				461,250
Guatemala — 0.4%
Guatemala Government Bond
4.875% 2/13/28 (a)		400,000		429,504
Hungary — 0.6%
Hungary Government International Bond
2.125% 9/22/31 (a)		655,000		644,420
India — 1.7%
Export Import Bank of India
2.250% 1/13/31 (a)		205,000		192,694
3.250% 1/15/30 (a)		1,500,000		1,525,237
				1,717,931
Indonesia — 5.6%
Indonesia Government International Bond
4.625% 4/15/43 (a)		1,000,000		1,173,991
Perusahaan Penerbit SBSN Indonesia
3.800% 6/23/50 (a)		200,000		209,410
4.450% 2/20/29 (a)		1,050,000		1,197,578
4.550% 3/29/26 (a)		2,450,000		2,745,102
Perusahaan Penerbit SBSN Indonesia III
2.800% 6/23/30 (a)		450,000		463,883
				5,789,964
Ivory Coast — 1.6%
Ivory Coast Government International Bond
5.750% STEP 12/31/32 (a)		164,236		164,693
5.750% STEP 12/31/32 (a)		98,542		98,816
6.125% 6/15/33 (a)		1,200,000		1,263,000

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

	Principal Amount		Value
6.625% 3/22/48 EUR (a) (e)	$	150,000	$	169,347
				1,695,856
Jamaica — 1.1%
Jamaica Government International Bond
6.750% 4/28/28		200,000		229,500
8.000% 3/15/39		500,000		691,875
8.000% 3/15/39		175,000		242,156
				1,163,531
Jordan — 1.2%
Jordan Government International Bond
5.850% 7/07/30 (a)		1,200,000		1,212,156
Lebanon — 0.2%
Lebanon Government International Bond
6.000% 1/27/23 (a) (d)		1,640,000		169,051
Morocco — 1.7%
Morocco Government International Bond
2.375% 12/15/27 (a)		525,000		511,219
3.000% 12/15/32 (a)		400,000		381,216
3.000% 12/15/32 (a)		225,000		214,434
4.000% 12/15/50 (a)		750,000		679,687
				1,786,556
Oman — 3.3%
Oman Government International Bond
4.750% 6/15/26 (a)		600,000		617,096
4.750% 6/15/26 (a)		550,000		565,672
5.375% 3/08/27 (a)		200,000		209,410
6.500% 3/08/47 (a)		390,000		386,451
6.750% 10/28/27 (a)		400,000		448,000
6.750% 10/28/27 (a)		400,000		448,000
6.750% 1/17/48 (a)		300,000		304,830
7.000% 1/25/51 (a)		400,000		418,320
				3,397,779
Pakistan — 0.5%
Pakistan Government International Bond
7.875% 3/31/36 (a)		562,000		543,021
Paraguay — 1.5%
Paraguay Government International Bond
2.739% 1/29/33 (a)		200,000		192,500
4.950% 4/28/31 (a)		400,000		449,000
5.400% 3/30/50 (a)		600,000		684,750
5.400% 3/30/50 (a)		200,000		228,250
				1,554,500
Peru — 1.0%
Peruvian Government International Bond
2.780% 12/01/60		670,000		587,932
3.300% 3/11/41		300,000		300,003

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

	Principal Amount		Value
3.550% 3/10/51	$	130,000	$	135,201
				1,023,136
Philippines — 0.5%
Philippine Government International Bond
2.650% 12/10/45		600,000		567,312
Qatar — 2.0%
Qatar Government International Bond
4.400% 4/16/50 (a)		200,000		248,459
4.400% 4/16/50 (a)		200,000		248,458
4.817% 3/14/49 (a)		1,200,000		1,572,768
				2,069,685
Romania — 1.6%
Romanian Government International Bond
2.875% 4/13/42 EUR (a) (e)		125,000		127,345
3.000% 2/14/31 (a) (c)		174,000		176,445
3.000% 2/14/31 (a)		500,000		507,026
4.000% 2/14/51 (a)		160,000		159,754
4.000% 2/14/51 (a)		722,000		720,888
				1,691,458
Russia — 2.8%
Russian Foreign Bond
4.375% 3/21/29 (a)		2,000,000		2,201,624
5.250% 6/23/47 (a)		600,000		759,024
				2,960,648
Saudi Arabia — 1.4%
Saudi Government International Bond
2.750% 2/03/32 (a)		500,000		514,435
3.750% 1/21/55 (a)		400,000		428,824
5.000% 4/17/49 (a)		400,000		506,981
				1,450,240
Senegal — 0.7%
Senegal Government International Bond
4.750% 3/13/28 EUR (a) (e)		300,000		346,222
6.250% 5/23/33 (a)		150,000		154,225
6.250% 5/23/33 (a)		200,000		205,634
				706,081
Serbia — 1.2%
Serbia International Bond
2.125% 12/01/30 (a)		200,000		187,140
2.125% 12/01/30 (a)		1,100,000		1,029,270
				1,216,410
South Africa — 0.4%
Republic of South Africa Government International Bond
6.250% 3/08/41		400,000		423,520

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

	Principal Amount		Value
Sri Lanka — 0.9%
Sri Lanka Government International Bond
6.125% 6/03/25 (a)	$	500,000	$	260,000
6.125% 6/03/25 (a)		200,000		104,000
6.825% 7/18/26 (a)		200,000		101,080
6.850% 11/03/25 (a)		900,000		461,412
				926,492
Suriname — 0.2%
Suriname Government International Bond
9.250% 10/26/26 (a)		216,000		164,268
Trinidad And Tobago — 0.5%
Trinidad & Tobago Government International Bond
4.500% 6/26/30 (a)		510,000		516,630
Turkey — 1.5%
Turkey Government International Bond
4.250% 4/14/26		400,000		357,960
4.875% 10/09/26		600,000		542,983
4.875% 4/16/43		450,000		344,340
6.000% 1/14/41		350,000		290,500
				1,535,783
Ukraine — 2.6%
Ukraine Government International Bond
0.000%FRN 5/31/40 (a) (f)		115,000		104,535
7.750% 9/01/25 (a)		800,000		766,240
7.750% 9/01/27 (a)		975,000		922,346
8.994% 2/01/24 (a)		300,000		298,994
9.750% 11/01/28 (a)		600,000		605,508
				2,697,623
United Arab Emirates — 0.3%
Abu Dhabi Government International Bond
3.125% 4/16/30 (a)		250,000		270,687
Uruguay — 0.2%
Uruguay Government International Bond
5.100% 6/18/50		150,000		198,077
Uzbekistan — 0.9%
Republic of Uzbekistan International Bond
3.900% 10/19/31 (a)		298,000		284,626
5.375% 2/20/29 (a)		400,000		425,323
5.375% 2/20/29 (a)		200,000		212,662
				922,611
Venezuela — 0.1%
Venezuela Government International Bond
7.750% 10/13/19 (a) (d)		1,000,000		60,000
9.250% 9/15/27 (d)		300,000		18,000
11.750% 10/21/26 (a) (d)		300,000		18,000
12.750% 8/23/22 (a) (d)		255,000		15,300
				111,300

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

	Principal Amount		Value
Vietnam — 0.9%
Vietnam Government International Bond
4.800% 11/19/24 (a)	$	850,000	$	919,638
Zambia — 0.4%
Zambia Government International Bond
5.375% 9/20/22 (a) (d)		600,000		447,850
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $66,213,136)				63,728,443
TOTAL BONDS & NOTES (Cost $104,572,941)				99,286,738
	Number of Shares
MUTUAL FUNDS — 1.1%
Diversified Financial Services — 1.1%
United States — 1.1%
State Street Navigator Securities Lending Government Money Market Portfolio (g)		1,108,985		1,108,985
TOTAL MUTUAL FUNDS (Cost $1,108,985)				1,108,985
TOTAL LONG-TERM INVESTMENTS (Cost $105,681,926)				100,395,723
SHORT-TERM INVESTMENTS — 3.7%
Mutual Fund — 2.7%
T. Rowe Price Government Reserve Investment Fund		2,865,319		2,865,319
	Principal Amount
Repurchase Agreement — 0.9%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21,
0.000%, due 1/03/22 (h)	$	918,606		918,606
U.S. Treasury Bill — 0.1%
U.S. Treasury Bill
0.124% 6/16/22 (i) (j)		100,000		99,940
TOTAL SHORT-TERM INVESTMENTS (Cost $3,883,869)				3,883,865
TOTAL INVESTMENTS — 100.1% (Cost $109,565,795) (k)				104,279,588
Other Assets/(Liabilities) — (0.1)%				(61,998)
NET ASSETS — 100.0%			$	104,217,590

Abbreviation Legend

FRN Floating Rate Note

STEP Step Up Bond

VRN Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At December 31, 2021, the aggregate market value of these securities amounted to $83,224,849 or 79.86% of net assets.

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

(c) Denotes all or a portion of security on loan. The total value of securities on loan as of December 31, 2021, was $1,265,708 or 1.21% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $186,078 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 currently in default due to bankruptcy or failure to make payment of principal or interest of the issuer. Income is not being accrued. At December 31, 2021, these securities amounted to a value of $1,215,286 or 1.17% of net assets.

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

(f) Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions. These securities do not indicate a reference rate and spread in their description above. The rates shown are the current interest rates at December 31, 2021.

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

(h) Maturity value of $918,606. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $937,045.

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

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

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

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
BNP Paribas SA	2/25/22	USD	234,369	EUR	206,541		(1,023)
Citibank N.A.	2/25/22	USD	110,595	EUR	97,442		(458)
Goldman Sachs International	2/25/22	USD	413,981	EUR	356,400		7,796
Morgan Stanley & Co. LLC	2/25/22	USD	717,214	EUR	623,042		7,141
UBS AG	2/25/22	USD	723,170	EUR	622,286		13,959
						$	27,415

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

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Ultra Bond	3/22/22		19	$	3,685,658	$	59,717
Short
U.S. Treasury Note 10 Year	3/22/22		43	$	(5,592,962)	$	(17,194)

Currency Legend

CLP Chilean Peso

EUR	Euro
USD	U.S. Dollar

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.1%
COMMON STOCK — 98.5%
Basic Materials — 2.3%
Chemicals — 2.1%
Air Products & Chemicals, Inc.		16,879	$	5,135,604
Albemarle Corp.		114		26,650
CF Industries Holdings, Inc.		256		18,120
International Flavors & Fragrances, Inc.		51,024		7,686,766
Linde PLC		59,922		20,758,778
RPM International, Inc.		423		42,723
The Sherwin-Williams Co.		52,594		18,521,503
				52,190,144
Forest Products & Paper — 0.0%
International Paper Co.		882		41,436
West Fraser Timber Co. Ltd.		127		12,111
				53,547
Mining — 0.2%
BHP Group Ltd. Sponsored ADR (a)		77,562		4,680,867
				56,924,558
Communications — 20.7%
Advertising — 0.1%
The Trade Desk, Inc. Class A (b)		46,400		4,252,096
Internet — 18.8%
Airbnb, Inc. Class A (b)		3,835		638,489
Alphabet, Inc. Class A (b)		16,153		46,795,887
Alphabet, Inc. Class C (b)		45,178		130,726,609
Amazon.com, Inc. (b)		34,912		116,408,478
Booking Holdings, Inc. (b)		6,371		15,285,494
CDW Corp.		216		44,232
Coupang, Inc. (a) (b)		117,920		3,464,490
DoorDash, Inc., Class A (b)		40,343		6,007,073
Expedia Group, Inc. (b)		28,603		5,169,134
Farfetch Ltd. Class A (b)		133,255		4,454,715
IAC/InterActiveCorp (b)		4,301		562,184
Kuaishou Technology (b) (c)		10,900		100,736
Match Group, Inc. (b)		50,338		6,657,200
Meituan Class B (b) (c)		78,000		2,254,972
Meta Platforms, Inc. Class A (b)		167,923		56,480,901
Netflix, Inc. (b)		35,018		21,096,244
NortonLifeLock, Inc.		3,653		94,905
Opendoor Technologies, Inc. (b)		1,019		14,888

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

	Number of Shares		Value
Pinduoduo, Inc. ADR (b)		24,000	$	1,399,200
Pinterest, Inc. Class A (b)		69,581		2,529,269
Sea Ltd. ADR (b)		76,641		17,145,358
Shopify, Inc. Class A (b)		4,385		6,039,855
Snap, Inc. Class A (b)		324,708		15,271,017
Spotify Technology SA (b)		43,911		10,276,491
VeriSign, Inc. (b)		5,779		1,466,826
Vimeo, Inc. (b)		25,537		458,645
				470,843,292
Media — 1.2%
Charter Communications, Inc. Class A (b)		9,100		5,932,927
Comcast Corp. Class A		64,771		3,259,925
DISH Network Corp. Class A (b)		155		5,028
Liberty Broadband Corp. Class C (b)		555		89,411
The Walt Disney Co. (b)		133,461		20,671,774
				29,959,065
Telecommunications — 0.6%
AT&T, Inc.		4,886		120,195
Cisco Systems, Inc.		3,837		243,151
Motorola Solutions, Inc.		20,297		5,514,695
T-Mobile US, Inc. (b)		73,094		8,477,442
Verizon Communications, Inc.		1,983		103,037
				14,458,520
				519,512,973
Consumer, Cyclical — 9.3%
Airlines — 0.0%
Delta Air Lines, Inc. (b)		19,463		760,614
Southwest Airlines Co. (b)		991		42,454
United Airlines Holdings, Inc. (b)		634		27,757
				830,825
Apparel — 0.2%
NIKE, Inc. Class B		36,397		6,066,288
VF Corp.		355		25,993
				6,092,281
Auto Manufacturers — 3.2%
Cummins, Inc.		584		127,394
Ferrari NV		33,917		8,778,398
General Motors Co. (b)		132,762		7,783,836
PACCAR, Inc.		1,537		135,655
Rivian Automotive, Inc. Class A (b)		56,685		5,877,668
Rivian Automotive, Inc., Lockup Shares (Acquired 12/23/19 - 1/19/21, Cost $9,376,340) (b) (d) (e)		581,398		57,270,901
Tesla, Inc. (b)		437		461,813
				80,435,665
Auto Parts & Equipment — 0.0%
Aptiv PLC (b)		401		66,145

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

	Number of Shares		Value
Aurora Innovation, Inc., Lockup Shares (Acquired 3/01/19, Cost $439,191) (b) (d) (e)		103,180	$	1,103,716
Magna International, Inc. (a)		595		48,159
				1,218,020
Entertainment — 0.1%
DraftKings, Inc. Class A (b)		59,945		1,646,689
Home Builders — 0.0%
NVR, Inc. (b)		10		59,089
Leisure Time — 0.1%
Peloton Interactive, Inc. Class A (b)		55,313		1,977,993
Lodging — 1.5%
Hilton Worldwide Holdings, Inc. (b)		100,069		15,609,763
Las Vegas Sands Corp. (b)		97,212		3,659,060
Marriott International, Inc. Class A (b)		70,124		11,587,290
MGM Resorts International		1,144		51,343
Wynn Resorts Ltd. (b)		73,790		6,275,101
				37,182,557
Retail — 4.2%
AutoZone, Inc. (b)		32		67,084
Burlington Stores, Inc. (b)		250		72,878
CarMax, Inc. (b)		139		18,102
Carvana Co. (b)		20,377		4,723,185
Chipotle Mexican Grill, Inc. (b)		4,068		7,111,881
Costco Wholesale Corp.		431		244,679
Dollar General Corp.		38,481		9,074,974
Dollar Tree, Inc. (b)		349		49,041
The Home Depot, Inc.		27,358		11,353,844
Lowe's Cos., Inc.		534		138,028
Lululemon Athletica, Inc. (b)		21,068		8,247,069
McDonald's Corp.		6,456		1,730,660
O'Reilly Automotive, Inc. (b)		144		101,697
Ross Stores, Inc.		161,594		18,466,962
Starbucks Corp.		38,724		4,529,546
The TJX Cos., Inc.		81,625		6,196,970
Ulta Beauty, Inc. (b)		106		43,708
Walmart, Inc.		83,972		12,149,909
Yum! Brands, Inc.		146,947		20,405,060
				104,725,277
				234,168,396
Consumer, Non-cyclical — 16.6%
Agriculture — 0.0%
Altria Group, Inc.		1,782		84,449
Darling Ingredients, Inc. (b)		168		11,641
Philip Morris International, Inc.		1,783		169,385
				265,475
Beverages — 0.9%
The Coca-Cola Co.		180,316		10,676,510
Constellation Brands, Inc. Class A		442		110,929

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

	Number of Shares		Value
Keurig Dr Pepper, Inc.		220,360	$	8,122,470
Monster Beverage Corp. (b)		786		75,487
PepsiCo, Inc.		15,994		2,778,318
				21,763,714
Biotechnology — 0.1%
Amgen, Inc.		574		129,133
Argenx SE ADR (b)		7,004		2,452,731
Biogen, Inc. (b)		71		17,034
Moderna, Inc. (b)		241		61,209
Regeneron Pharmaceuticals, Inc. (b)		75		47,364
Vertex Pharmaceuticals, Inc. (b)		288		63,245
				2,770,716
Commercial Services — 1.9%
Affirm Holdings, Inc. (b)		13,134		1,320,755
Afterpay Ltd. (b)		94,856		5,677,603
Ant International Co. Ltd., Class C (Acquired 6/07/18, Cost $ 1,171,890) (b) (d) (e) (f)		307,471		1,125,928
Block, Inc. (b)		12,800		2,067,328
Cintas Corp.		12,576		5,573,306
Equifax, Inc.		66		19,324
FleetCor Technologies, Inc. (b)		573		128,260
Global Payments, Inc.		44,012		5,949,542
MarketAxess Holdings, Inc.		4,538		1,866,343
PayPal Holdings, Inc. (b)		26,676		5,030,560
S&P Global, Inc.		13,319		6,285,636
Toast, Inc., Class A (b)		4,335		150,468
TransUnion		55,593		6,592,218
United Rentals, Inc. (b)		14,390		4,781,653
				46,568,924
Cosmetics & Personal Care — 0.0%
Colgate-Palmolive Co.		77		6,571
The Estee Lauder Cos., Inc. Class A		259		95,882
The Procter & Gamble Co.		1,950		318,981
				421,434
Food — 0.4%
Conagra Brands, Inc.		740		25,271
Mondelez International, Inc. Class A		148,929		9,875,482
Mowi ASA		304		7,212
Tyson Foods, Inc. Class A		647		56,393
				9,964,358
Health Care – Products — 5.3%
Abbott Laboratories		18,335		2,580,468
Align Technology, Inc. (b)		3,763		2,472,968
Avantor, Inc. (b)		125,806		5,301,465
Boston Scientific Corp. (b)		29,184		1,239,736
The Cooper Cos., Inc.		40		16,758
Danaher Corp.		110,253		36,274,339
Hologic, Inc. (b)		716		54,817
Intuitive Surgical, Inc. (b)		45,597		16,383,002
Medtronic PLC		190,009		19,656,431

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

	Number of Shares		Value
PerkinElmer, Inc.		40,145	$	8,071,554
Steris PLC		10,691		2,602,296
Stryker Corp.		48,780		13,044,748
Thermo Fisher Scientific, Inc.		35,771		23,867,842
West Pharmaceutical Services, Inc.		1,304		611,589
Zimmer Biomet Holdings, Inc.		9,077		1,153,142
				133,331,155
Health Care – Services — 4.0%
Anthem, Inc.		51,016		23,647,957
Centene Corp. (b)		204,916		16,885,078
HCA Healthcare, Inc.		105,039		26,986,620
Humana, Inc.		7,638		3,542,963
UnitedHealth Group, Inc.		54,495		27,364,119
				98,426,737
Household Products & Wares — 0.2%
Avery Dennison Corp.		3,553		769,473
Kimberly-Clark Corp.		33,326		4,762,952
				5,532,425
Pharmaceuticals — 3.8%
AbbVie, Inc.		151,138		20,464,085
AstraZeneca PLC Sponsored ADR		435,198		25,350,283
Becton Dickinson and Co.		34,981		8,797,022
Cigna Corp.		48,439		11,123,048
CVS Health Corp.		840		86,654
Elanco Animal Health, Inc. (b)		144,201		4,092,424
Eli Lilly & Co.		71,857		19,848,341
Johnson & Johnson		20,114		3,440,902
McKesson Corp.		80		19,886
Merck & Co., Inc.		8,651		663,013
Pfizer, Inc.		3,307		195,278
Roche Holding AG Sponsored ADR		975		50,398
Sanofi Sponsored ADR		1,964		98,396
Zoetis, Inc.		6,927		1,690,396
				95,920,126
				414,965,064
Energy — 0.0%
Oil & Gas — 0.0%
Chevron Corp.		1,047		122,865
ConocoPhillips		3,032		218,850
EOG Resources, Inc.		1,022		90,784
Exxon Mobil Corp.		1,834		112,223
Marathon Petroleum Corp.		772		49,400
Pioneer Natural Resources Co.		202		36,740
TotalEnergies SE Sponsored ADR		1,952		96,546
				727,408
Oil & Gas Services — 0.0%
Halliburton Co.		4,244		97,060

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

	Number of Shares		Value
			$	824,468
Financial — 13.4%
Banks — 3.5%
Bank of America Corp.		798,457		35,523,352
The Bank of New York Mellon Corp.		32,171		1,868,492
Citigroup, Inc.		2,205		133,160
Citizens Financial Group, Inc.		1,828		86,373
Fifth Third Bancorp		4,722		205,643
The Goldman Sachs Group, Inc.		11,641		4,453,264
Huntington Bancshares, Inc.		10,748		165,734
JP Morgan Chase & Co.		755		119,554
Morgan Stanley		145,923		14,323,802
The PNC Financial Services Group, Inc.		22,833		4,578,473
Signature Bank		285		92,189
State Street Corp.		132,191		12,293,763
Wells Fargo & Co.		302,958		14,535,925
				88,379,724
Diversified Financial Services — 2.8%
Apollo Global Management, Inc. (a)		357		25,858
Cboe Global Markets, Inc.		420		54,768
The Charles Schwab Corp.		315,239		26,511,600
CME Group, Inc.		721		164,720
Intercontinental Exchange, Inc.		946		129,384
Maplebear, Inc. (Non-Voting) (Acquired 8/07/20, Cost $14,781) (b) (d) (e) (f)		319		37,881
Maplebear, Inc. (Voting) (Acquired 8/07/20, Cost $282,637) (b) (d) (e) (f)		6,100		724,375
Mastercard, Inc. Class A		48,462		17,413,366
SoFi Technologies, Inc. (a) (b)		182,924		2,892,029
Tradeweb Markets, Inc. Class A		19,124		1,915,077
Visa, Inc. Class A		91,392		19,805,560
				69,674,618
Insurance — 4.4%
American International Group, Inc.		641,602		36,481,490
Assurant, Inc.		400		62,344
Berkshire Hathaway, Inc. Class B (b)		1,397		417,703
Chubb Ltd.		121,156		23,420,666
Equitable Holdings, Inc.		265,060		8,691,317
The Hartford Financial Services Group, Inc.		226,575		15,642,738
Marsh & McLennan Cos., Inc.		36,948		6,422,301
MetLife, Inc.		76,499		4,780,423
RenaissanceRe Holdings Ltd.		7,271		1,231,198
The Travelers Cos., Inc.		77,036		12,050,742
Voya Financial, Inc.		1,100		72,941
				109,273,863
Private Equity — 0.0%
KKR & Co., Inc.		893		66,529
Real Estate Investment Trusts (REITS) — 2.7%
Alexandria Real Estate Equities, Inc.		26,315		5,867,192
American Tower Corp.		3,375		987,188
AvalonBay Communities, Inc.		262		66,179
Camden Property Trust		59,965		10,714,546

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

	Number of Shares		Value
Equinix, Inc.		113	$	95,580
Equity LifeStyle Properties, Inc.		82,178		7,203,723
Equity Residential		18,051		1,633,615
Essex Property Trust, Inc.		106		37,336
Prologis, Inc.		206,883		34,830,822
Public Storage		53		19,852
SBA Communications Corp.		27		10,504
Simon Property Group, Inc.		160		25,563
Sun Communities, Inc.		80		16,798
Welltower, Inc.		40,751		3,495,213
Weyerhaeuser Co.		79,917		3,290,982
				68,295,093
				335,689,827
Industrial — 9.5%
Aerospace & Defense — 0.7%
Airbus SE (b)		58,044		7,413,021
The Boeing Co. (b)		571		114,954
Howmet Aerospace, Inc.		56,780		1,807,307
L3 Harris Technologies, Inc.		421		89,774
Raytheon Technologies Corp.		284		24,441
Teledyne Technologies, Inc. (b)		20,447		8,933,090
TransDigm Group, Inc. (b)		31		19,724
				18,402,311
Building Materials — 0.4%
Martin Marietta Materials, Inc.		15,419		6,792,378
Vulcan Materials Co.		17,808		3,696,584
				10,488,962
Electrical Components & Equipment — 0.3%
Generac Holdings, Inc. (b)		18,131		6,380,662
Electronics — 1.5%
Agilent Technologies, Inc.		84,661		13,516,129
Amphenol Corp. Class A		21,343		1,866,659
Fortive Corp.		94,041		7,174,388
Honeywell International, Inc.		26,444		5,513,838
Hubbell, Inc.		43,897		9,142,428
Keysight Technologies, Inc. (b)		107		22,097
TE Connectivity Ltd.		7,466		1,204,564
Trimble, Inc. (b)		18		1,569
				38,441,672
Engineering & Construction — 0.2%
Jacobs Engineering Group, Inc.		43,689		6,082,819
Environmental Controls — 0.7%
Republic Services, Inc.		105,876		14,764,408
Waste Connections, Inc.		12,914		1,759,791
				16,524,199

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

	Number of Shares		Value
Machinery – Construction & Mining — 0.1%
Caterpillar, Inc.		7,104	$	1,468,681
Machinery – Diversified — 0.2%
Deere & Co.		13,617		4,669,133
Flowserve Corp.		705		21,573
Ingersoll Rand, Inc.		1,170		72,388
Otis Worldwide Corp.		1,222		106,400
				4,869,494
Miscellaneous - Manufacturing — 1.9%
General Electric Co.		368,274		34,790,845
Illinois Tool Works, Inc.		5,397		1,331,980
Parker-Hannifin Corp.		227		72,213
Siemens AG Registered		64,340		11,183,749
Textron, Inc.		1,416		109,315
				47,488,102
Packaging & Containers — 0.7%
Ball Corp.		1,033		99,447
Packaging Corp. of America		29,109		3,963,190
Sealed Air Corp.		1,483		100,058
WestRock Co.		292,930		12,994,375
				17,157,070
Transportation — 2.8%
Canadian Pacific Railway Ltd.		585		42,085
CSX Corp.		423,471		15,922,510
FedEx Corp.		34,670		8,967,049
Norfolk Southern Corp.		70,431		20,968,013
Union Pacific Corp.		58,000		14,611,940
United Parcel Service, Inc. Class B		51,025		10,936,698
				71,448,295
				238,752,267
Technology — 22.9%
Computers — 3.2%
Accenture PLC Class A		27,744		11,501,275
Apple, Inc.		375,168		66,618,582
Cognizant Technology Solutions Corp. Class A		15,668		1,390,065
Fortinet, Inc. (b)		93		33,424
Leidos Holdings, Inc.		534		47,473
				79,590,819
Semiconductors — 5.2%
Advanced Micro Devices, Inc. (b)		89,288		12,848,543
Analog Devices, Inc.		33,856		5,950,869
Applied Materials, Inc.		76,303		12,007,040
ASML Holding NV		29,551		23,526,733
Broadcom, Inc.		34,580		23,009,878
KLA Corp.		22,219		9,556,614
Lam Research Corp.		6,242		4,488,934
Marvell Technology, Inc.		76		6,649

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

	Number of Shares		Value
Monolithic Power Systems, Inc.		111	$	54,760
NVIDIA Corp.		71,001		20,882,104
QUALCOMM, Inc.		68,912		12,601,938
Taiwan Semiconductor Manufacturing Co. Ltd. Sponsored ADR Sponsored ADR		49,861		5,998,777
Texas Instruments, Inc.		102		19,224
Xilinx, Inc.		656		139,092
				131,091,155
Software — 14.5%
Atlassian Corp. PLC Class A (b)		7,700		2,935,933
Avalara, Inc. (b)		17,293		2,232,699
Bill.com Holdings, Inc. (b)		3,632		904,913
Black Knight, Inc. (b)		80,731		6,691,793
Broadridge Financial Solutions, Inc.		7,790		1,424,168
Cadence Design Systems, Inc. (b)		565		105,288
Canva, Inc. (Acquired 12/17/21-12/22/21, Cost $872,531) (b) (d) (e) (f)		512		872,531
Celonis SE (Acquired 6/17/21, Cost $435,243) (b) (d) (e) (f)		1,177		435,243
Ceridian HCM Holding, Inc. (b)		27,382		2,860,324
Citrix Systems, Inc.		897		84,847
Clarivate PLC (b)		934		21,968
Datadog, Inc. Class A (b)		33,758		6,012,637
Electronic Arts, Inc.		395		52,100
Epic Games, Inc. (Acquired 6/18/20-3/29/21, Cost $2,419,150) (b) (d) (e) (f)		3,660		3,519,493
Fidelity National Information Services, Inc.		7,867		858,683
Fiserv, Inc. (b)		100,448		10,425,498
HashiCorp, Inc. Class A (b)		8,584		781,487
Intuit, Inc.		42,686		27,456,489
Microsoft Corp.		564,013		189,688,852
MongoDB, Inc. (b)		14,446		7,646,990
MSCI, Inc.		3,293		2,017,588
Paycom Software, Inc. (b)		5,735		2,381,115
Playtika Holding Corp. (b)		1,497		25,883
ROBLOX Corp. Class A (b)		61,424		6,336,500
Roper Technologies, Inc.		20,885		10,272,496
salesforce.com, Inc. (b)		142,875		36,308,824
SentinelOne Inc. Class A (b)		93,331		4,712,282
ServiceNow, Inc. (b)		23,743		15,411,819
Snowflake, Inc. Class A (b)		8,151		2,761,151
Stripe, Inc., Class B (Acquired 12/17/19, Cost $295,694) (b) (d) (e) (f)		18,846		1,218,394
Synopsys, Inc. (b)		294		108,339
Twilio, Inc. Class A (b)		9,300		2,449,062
UiPath, Inc. Class A (b)		119,442		5,151,533
Workday, Inc. Class A (b)		11,481		3,136,379
Zoom Video Communications, Inc. Class A (b)		30,057		5,527,783
				362,831,084
				573,513,058
Utilities — 3.8%
Electric — 3.7%
AES Corp.		114,592		2,784,586
Ameren Corp.		1,261		112,242
CMS Energy Corp.		24,117		1,568,811
Dominion Energy, Inc.		96,051		7,545,767
Entergy Corp.		40,246		4,533,712
Eversource Energy		38,285		3,483,169

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

	Number of Shares		Value
NextEra Energy, Inc.		237,104	$	22,136,029
PG&E Corp. (b)		448,209		5,441,257
Public Service Enterprise Group, Inc.		265		17,683
Sempra Energy		123,210		16,298,219
The Southern Co.		239,878		16,450,833
WEC Energy Group, Inc.		584		56,689
Xcel Energy, Inc.		184,217		12,471,491
				92,900,488
Gas — 0.1%
Atmos Energy Corp.		149		15,611
NiSource, Inc.		59,896		1,653,728
				1,669,339
				94,569,827
TOTAL COMMON STOCK (Cost $1,841,822,230)				2,468,920,438
PREFERRED STOCK — 0.6%
Consumer, Cyclical — 0.2%
Auto Manufacturers — 0.1%
Nuro, Inc., Series C (Acquired 10/30/20-3/21/21, Cost $1,236,023)
(b) (d) (e) (f)		94,681		1,973,694
Nuro, Inc., Series D (Acquired 10/29/21, Cost $487,977)
(b) (d) (e) (f)		23,409		487,977
Waymo LLC, Series A-2 (Acquired 5/08/20, Cost $748,934)
(b) (d) (e) (f)		8,722		799,999
				3,261,670
Auto Parts & Equipment — 0.1%
GM Cruise Holdings, LLC, Class F (Acquired 5/07/19, Cost $ 921,625)
(b) (d) (e) (f)		50,500		1,330,675
GM Cruise Holdings, LLC, Class G (Acquired 1/21/21, Cost $979,851)
(b) (d) (e) (f)		37,186		979,851
				2,310,526
Consumer, Non-cyclical — 0.1%
Commercial Services — 0.1%
Redwood Materials, Inc., Series C, (Acquired 5/28/21, Cost $1,059,705)
(b) (d) (e) (f)		22,355		1,059,705
Financial — 0.1%
Investment Companies — 0.1%
Maplebear, Inc., Series A (Acquired 11/18/20, Cost $53,081)
(b) (d) (e) (f)		870		103,313
Maplebear, Inc., Series G (Acquired 7/02/20, Cost $599,129)
(b) (d) (e) (f)		12,458		1,479,388
Maplebear, Inc., Series I (Acquired 2/26/21, Cost $240,750)
(b) (d) (e) (f)		1,926		228,713
				1,811,414
				1,811,414

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

	Number of Shares		Value
Industrial — 0.0%
Electrical Components & Equipment — 0.0%
Sila Nanotechnologies, Inc., Series F (Acquired 1/07/21, Cost $760,988) (b) (d) (e) (f)		18,438	$	760,988
Technology — 0.1%
Software — 0.1%
Canva, Inc., Series A (Acquired 12/17/21, Cost $49,421) (b) (d) (e) (f)		29		49,421
Canva, Inc., Series A-3 (Acquired 12/17/21, Cost $13,633) (b) (d) (e) (f)		8		13,633
Celonis SE, Series D (Acquired 6/17/21, Cost $1,135,255) (b) (d) (e) (f)		3,070		1,135,255
Formagrid, Inc., Series F (Acquired 12/08/21, Cost $1,130,824) (b) (d) (e) (f)		6,038		1,130,824
Rappi, Inc., Series E (Acquired 9/08/20-9/24/20, Cost $1,092,516) (b) (d) (e) (f)		18,286		1,178,041
				3,507,174
				3,507,174
Utilities — 0.1%
Electric — 0.1%
The AES Corp. Convertible 6.875%		13,043		1,252,128
The Southern Co. Convertible		25,817		1,387,663
				2,639,791
				2,639,791
TOTAL PREFERRED STOCK (Cost $13,133,795)				15,351,268
TOTAL EQUITIES (Cost $1,854,956,025)				2,484,271,706
MUTUAL FUNDS — 0.2%
Diversified Financial Services — 0.2%
State Street Navigator Securities Lending Government Money Market Portfolio (g)		4,810,724		4,810,724
TOTAL MUTUAL FUNDS (Cost $4,810,724)				4,810,724
TOTAL LONG-TERM INVESTMENTS (Cost $1,859,766,749)				2,489,082,430
SHORT-TERM INVESTMENTS — 1.3%
Mutual Fund — 1.1%
T. Rowe Price Government Reserve Investment Fund		27,678,011		27,678,011
	Principal Amount
Repurchase Agreement — 0.2%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (h)	$	4,417,252		4,417,252

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

	Principal Amount	Value
TOTAL SHORT-TERM INVESTMENTS (Cost $32,095,263)		$	32,095,263
TOTAL INVESTMENTS — 100.6% (Cost $1,891,862,012) (i)			2,521,177,693
Other Assets/(Liabilities) — (0.6)%			(14,482,820)
NET ASSETS — 100.0%		$	2,506,694,873

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 December 31, 2021, was $9,772,197 or 0.39% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $5,180,312 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 December 31, 2021, the aggregate market value of these securities amounted to $2,355,708 or 0.09% of net assets.

(d) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At December 31, 2021, these securities amounted to a value of $79,019,939 or 3.15% of net assets.

(e) Restricted security. Certain securities are restricted as to resale. At December 31, 2021, these securities amounted to a value of $79,019,939 or 3.15% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

(f) Investment was valued using significant unobservable inputs.

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

(h) Maturity value of $4,417,252. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $4,505,662.

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

MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 99.8%
CORPORATE DEBT — 3.9%
Auto Manufacturers — 0.5%
Hyundai Capital America
0.875% 6/14/24 (a)	$	535,000	$	524,756
1.150% 11/10/22 (a)		160,000		160,406
1.250% 9/18/23 (a)		285,000		284,793
Nissan Motor Co. Ltd.
3.043% 9/15/23 (a)		200,000		205,238
Volkswagen Group of America Finance LLC
0.875% 11/22/23 (a)		260,000		258,293
				1,433,486
Banks — 0.9%
Bank of America Corp. SOFR + .410%
0.523% VRN 6/14/24		750,000		745,089
Bank of Montreal
0.625% 7/09/24		575,000		567,293
The Goldman Sachs Group, Inc. SOFR + .505%
0.657% VRN 9/10/24		750,000		743,783
Mitsubishi UFJ Financial Group, Inc. 1 year CMT + .550%
0.953% VRN 7/19/25		700,000		691,552
				2,747,717
Beverages — 0.0%
JDE Peet's NV
0.800% 9/24/24 (a)		150,000		147,008
Building Materials — 0.1%
Martin Marietta Materials, Inc.
0.650% 7/15/23		170,000		169,404
Commercial Services — 0.1%
HPHT Finance 17 Ltd.
2.750% 9/11/22 (a)		450,000		454,121
Computers — 0.2%
HCL America, Inc.
1.375% 3/10/26 (a)		600,000		584,215
Diversified Financial Services — 0.4%
Air Lease Corp.
3.500% 1/15/22		455,000		455,400
Ally Financial, Inc.
1.450% 10/02/23		160,000		160,505
Avolon Holdings Funding Ltd.
4.250% 4/15/26 (a)		115,000		121,927

MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Park Aerospace Holdings Ltd.
5.250% 8/15/22 (a)	$	425,000	$	434,316
				1,172,148
Electric — 0.3%
Alexander Funding Trust
1.841% 11/15/23 (a)		730,000		732,633
Consorcio Transmantaro SA
4.375% 5/07/23 (a) (b)		300,000		309,153
				1,041,786
Food — 0.1%
Mondelez International Holdings Netherlands BV
0.750% 9/24/24 (a)		340,000		334,367
Insurance — 0.1%
Brighthouse Financial Global Funding
0.600% 6/28/23 (a)		280,000		278,596
Iron & Steel — 0.1%
POSCO
2.375% 1/17/23 (a)		200,000		202,224
Leisure Time — 0.0%
YMCA of Greater New York
2.303% 8/01/26		70,000		69,407
Oil & Gas — 0.3%
Bharat Petroleum Corp. Ltd.
4.375% 1/24/22 (a)		400,000		400,679
SA Global Sukuk Ltd.
0.946% 6/17/24 (a)		500,000		492,276
				892,955
Pharmaceuticals — 0.1%
Perrigo Finance Unlimited Co.
3.900% 12/15/24		300,000		314,395
Pipelines — 0.3%
Energy Transfer LP
4.250% 3/15/23		582,000		598,094
Gray Oak Pipeline LLC
2.000% 9/15/23 (a)		30,000		30,324
Plains All American Pipeline LP/PAA Finance Corp.
3.850% 10/15/23		215,000		222,977
				851,395
Real Estate — 0.1%
MAF Sukuk Ltd.
4.500% 11/03/25 (a)		350,000		378,875
Retail — 0.0%
Nordstrom, Inc.
2.300% 4/08/24		60,000		60,000

MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Transportation — 0.1%
Eastern Creation II Investment Holdings Ltd.
1.350% 10/20/24 (a)	$	280,000	$	277,883
Trucking & Leasing — 0.2%
DAE Funding LLC
1.550% 8/01/24 (a)		200,000		198,500
SMBC Aviation Capital Finance DAC
3.000% 7/15/22 (a)		370,000		373,807
				572,307
TOTAL CORPORATE DEBT (Cost $9,703,542)				11,982,289
MUNICIPAL OBLIGATIONS — 0.3%
California State University, Revenue Bond
0.563% 11/01/24		125,000		123,249
City & County of Denver Co. Airport System Revenue
Revenue Bond, 0.877% 11/15/23		20,000		19,998
Revenue Bond, 1.115% 11/15/24		30,000		29,974
City of Atlanta GA Water & Wastewater Revenue
Revenue Bond, 0.271% 11/01/22		15,000		14,958
Revenue Bond, 0.407% 11/01/23		15,000		14,850
Revenue Bond, 0.616% 11/01/24		15,000		14,750
Dallas Area Rapid Transit
Revenue Bond, 0.397% 12/01/22		15,000		14,994
Revenue Bond, 0.541% 12/01/23		10,000		9,952
Revenue Bond, 0.761% 12/01/24		10,000		9,913
New York Transportation Development Corp., Revenue Bond
1.610% 12/01/22		15,000		15,077
Oklahoma Turnpike Authority, Revenue Bond
0.491% 1/01/22		30,000		30,000
State of Illinois, General Obligation
2.840% 10/01/23		485,000		496,699
Tobacco Settlement Finance Authority
Revenue Bond, 0.947% 6/01/22		30,000		30,045
Revenue Bond, 1.193% 6/01/23		50,000		50,081
Revenue Bond, 1.497% 6/01/24		65,000		65,036
				939,576
TOTAL MUNICIPAL OBLIGATIONS (Cost $930,000)				939,576
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 4.9%
Automobile Asset-Backed Securities — 0.6%
AmeriCredit Automobile Receivables Trust, Series 2020-3, Class C
1.060% 8/18/26		120,000		119,633
Avis Budget Rental Car Funding AESOP LLC, Series 2017-2A, Class A
2.970% 3/20/24 (a)		310,000		316,317
Carvana Auto Receivables Trust, Series 2021-P4, Class A3
1.310% 1/11/27		695,000		694,564
Exeter Automobile Receivables Trust, Series 2020-1A, Class B
2.260% 4/15/24 (a)		18,648		18,656
Santander Drive Auto Receivables Trust, Series 2020-4, Class C
1.010% 1/15/26		195,000		195,319
Santander Retail Auto Lease Trust
Series 2019-C, Class C, 2.390% 11/20/23 (a)		230,000		232,130

MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2019-B, Class C, 2.770% 8/21/23 (a)	$	170,000	$	171,431
				1,748,050
Commercial Mortgage-Backed Securities — 0.4%
BX Commercial Mortgage Trust, Series 2019-IMC, Class C, 1 mo. USD LIBOR + 1.600%
1.710% FRN 4/15/34 (a)		210,000		207,903
Commercial Mortgage Pass-Through Certificates
Series 2014-UBS4, Class AM, 3.968% 8/10/47		250,000		260,678
Series 2014-UBS2, Class AM, 4.199% 3/10/47		100,000		104,179
Extended Stay America Trust, Series 2021-ESH, Class B, 1 mo. USD LIBOR + 1.380%
1.490% FRN 7/15/38 (a)		258,654		258,654
Fontainebleau Miami Beach Trust, Series 2019-FBLU, Class C
3.750% 12/10/36 (a)		295,000		301,170
New Orleans Hotel Trust, Series 2019-HNLA, Class C, 1 mo. USD LIBOR + 1.589%
1.699% FRN 4/15/32 (a)		100,000		98,638
				1,231,222
Other Asset-Backed Securities — 0.9%
BRE Grand Islander Timeshare Issuer LLC, Series 2019-A, Class A
3.280% 9/26/33 (a)		50,982		52,483
Elara HGV Timeshare Issuer LLC, Series 2016-A, Class A
2.730% 4/25/28 (a)		272,373		277,415
HPEFS Equipment Trust, Series 2021-2A, Class C
0.880% 9/20/28 (a)		360,000		355,720
Madison Park Funding XXXVII Ltd., Series 2019-37A, Class AR, 3 mo. USD LIBOR + 1.070%
1.194% FRN 7/15/33 (a)		475,000		475,025
Magnetite XXV Ltd., Series 2020-25A, Class A, 3 mo. USD LIBOR + 1.200%
1.324% FRN 1/25/32 (a)		250,000		250,040
MVW Owner Trust, Series 2018-1A, Class A
3.450% 1/21/36 (a)		82,393		84,624
OZLM VIII Ltd., Series 2014-8A, Class A1R3, 3 mo. USD LIBOR + .980%
1.069% FRN 10/17/29 (a)		780,000		780,000
Sierra Receivables Funding LLC, Series 2019-3A, Class A
2.340% 8/20/36 (a)		59,508		60,346
Towd Point Mortgage Trust
Series 2017-6, Class A1, 2.750% VRN 10/25/57 (a) (c)		100,065		101,370
Series 2018-2, Class A1, 3.250% VRN 3/25/58 (a) (c)		116,185		118,765
Series 2018-5, Class A1A, 3.250% VRN 7/25/58 (a) (c)		80,035		81,633
Series 2015-6, Class A1, 3.500% VRN 4/25/55 (a) (c)		2,304		2,302
Series 2018-3, Class A1, 3.750% VRN 5/25/58 (a) (c)		59,165		60,911
				2,700,634
Student Loans Asset-Backed Securities — 0.5%
Navient Private Education Refi Loan Trust
Series 2021-EA, Class A, 0.970% 12/16/69 (a)		205,492		199,697
Series 2019-GA, Class A, 2.400% 10/15/68 (a)		159,095		160,941
Nelnet Student Loan Trust, Series 2021-CA, Class AFX
1.320% 4/20/62 (a)		658,024		647,320
SMB Private Education Loan Trust
Series 2016-B, Class A2A, 2.430% 2/17/32 (a)		141,201		142,304
Series 2017-B, Class A2A, 2.820% 10/15/35 (a)		242,747		246,652

MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2017-A, Class A2A, 2.880% 9/15/34 (a)	$	83,507	$	84,855
				1,481,769
Whole Loan Collateral Collateralized Mortgage Obligations — 2.5%
Angel Oak Mortgage Trust, Series 2019-2, Class A1,
3.628% VRN 3/25/49 (a) (c)		27,658		27,767
Bayview MSR Opportunity Master Fund Trust, Series 2021-2, Class A5,
2.500% VRN 6/25/51 (a) (c)		400,865		407,289
Citigroup Mortgage Loan Trust, Series 2019-IMC1, Class A1,
2.720% VRN 7/25/49 (a) (c)		53,553		53,520
COLT Funding LLC, Series 2021-6, Class A1,
1.907% VRN 12/25/66 (a) (c)		660,000		661,256
CSMC 2021-RPL6 Trust, Series 2021-RPL6, Class A1,
2.000% VRN 10/25/60 (a) (c)		356,164		358,434
Ellington Financial Mortgage Trust, Series 2019-2, Class A1,
2.739% VRN 11/25/59 (a) (c)		128,225		129,173
Flagstar Mortgage Trust, Series 2021-5INV, Class A5,
2.500% VRN 7/25/51 (a) (c)		423,842		429,616
FWD Securitization Trust, Series 2020-INV1, Class A3,
2.440% VRN 1/25/50 (a) (c)		97,280		97,924
Galton Funding Mortgage Trust
Series 2020-H1, Class A3, 2.617% VRN 1/25/60 (a) (c)		154,702		155,620
Series 2018-1, Class A33, 3.500% VRN 11/25/57 (a) (c)		85,850		86,656
Series 2018-2, Class A31, 4.500% VRN 10/25/58 (a) (c)		49,462		50,357
GS Mortgage-Backed Securities Trust, Series 2021-PJ6, Class A8,
2.500% VRN 11/25/51 (a) (c)		711,990		719,914
Homeward Opportunities Fund I Trust, Series 2019-3, Class A3,
3.031% VRN 11/25/59 (a) (c)		54,476		54,484
JP Morgan Mortgage Trust, Series 2019-INV2, Class A3,
3.500% VRN 2/25/50 (a) (c)		29,668		30,019
Metlife Securitization Trust, Series 2018-1A, Class A,
3.750% VRN 3/25/57 (a) (c)		107,376		111,987
New Residential Mortgage Loan Trust
Series 2020-NQM1, Class A1, 2.464% VRN 1/26/60 (a) (c)		75,858		76,211
Series 2019-NQM5, Class A3, 3.065% VRN 11/25/59 (a) (c)		69,966		70,375
Onslow Bay Financial LLC
Series 2020-EXP1, Class 2A1, 1 mo. USD LIBOR + .750% 0.852% FRN 2/25/60 (a)		32,726		32,757
Series 2019-EXP3, Class 2A1, 1 mo. USD LIBOR + .900% 1.002% FRN 10/25/59 (a)		67,142		67,142
Series 2019-EXP3, Class 2A2, 1 mo. USD LIBOR + 1.100% 1.202% FRN 10/25/59 (a)		37,703		37,703
Series 2020-INV1, Class A21, 3.500% VRN 12/25/49 (a) (c)		44,097		44,904
Series 2020-EXP1, Class 1A9, 3.500% VRN 2/25/60 (a) (c)		82,918		84,039
Series 2019-EXP1, Class 1A3, 4.000% VRN 1/25/59 (a) (c)		84,272		85,269
Series 2019-EXP2, Class 1A3, 4.000% VRN 6/25/59 (a) (c)		125,176		127,492
Sequoia Mortgage Trust
Series 2017-CH1, Class A2, 3.500% VRN 8/25/47 (a) (c)		41,161		41,492
Series 2017-CH1, Class A13, 4.000% VRN 8/25/47 (a) (c)		111,912		112,893
Series 2018-CH2, Class A3, 4.000% VRN 6/25/48 (a) (c)		14,595		14,806
Series 2018-CH3, Class A2, 4.000% VRN 8/25/48 (a) (c)		13,313		13,406
Series 2018-CH4, Class A2, 4.000% VRN 10/25/48 (a) (c)		9,579		9,637
SG Residential Mortgage Trust
Series 2021-1, Class A1, 1.160% VRN 7/25/61 (a) (c)		510,778		510,157
Series 2019-3, Class A3, 3.082% VRN 9/25/59 (a) (c)		100,009		99,911
Starwood Mortgage Residential Trust
Series 2021-3, Class A1, 1.127% VRN 6/25/56 (a) (c)		517,130		514,136
Series 2020-1, Class A3, 2.562% VRN 2/25/50 (a) (c)		120,236		120,616

MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2019-INV1, Class A1, 2.610% VRN 9/27/49 (a) (c)	$	55,397	$	55,830
Verus Securitization Trust
Series 2021-3, Class A1, 1.046% VRN 6/25/66 (a) (c)		477,326		474,037
Series 2021-8, Class A2, 2.286% VRN 11/25/66 (a) (c)		175,000		174,897
Series 2020-1, Class A1, 2.417% STEP 1/25/60 (a)		107,137		107,805
Series 2020-1, Class A3, 2.724% STEP 1/25/60 (a)		199,458		200,407
Series 2019-4, Class A3, 3.000% STEP 11/25/59 (a)		361,026		363,479
Series 2019-3, Class A3, 3.040% STEP 7/25/59 (a)		214,612		215,446
Series 2019-INV3, Class A3, 3.100% VRN 11/25/59 (a) (c)		367,597		370,546
Wells Fargo Mortgage Backed Securities Trust, Series 2021-RR1, Class A3,
2.500% VRN 12/25/50 (a) (c)		333,837		336,732
				7,736,141
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $14,888,209)				14,897,816
U.S. Government Agency Obligations and Instrumentalities (d) — 0.9%
Collateralized Mortgage Obligations — 0.0%
Government National Mortgage Association Series 2019-65, Class B 3.500% 5/20/49		74,042		78,263
Whole Loans — 0.9%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes
Series 2021-HQA2, Class M1, SOFR30A + .700% 0.750% FRN 12/25/33 (a)		440,000		439,843
Series 2018-DNA3, Class M1, 1 mo. USD LIBOR + .750% 0.853% FRN 9/25/48 (a)		531		531
Series 2018-DNA2, Class M1, 1 mo. USD LIBOR + .800% 0.903% FRN 12/25/30 (a)		36,104		36,110
Series 2018-DNA3, Class M2AS, 1 mo. USD LIBOR + .900% 1.003% FRN 9/25/48 (a)		140,000		139,778
Series 2018-DNA2, Class M2AS, 1 mo. USD LIBOR + .950% 1.053% FRN 12/25/30 (a)		80,000		79,801
Series 2017-DNA2, Class M1, 1 mo. USD LIBOR + 1.200% 1.303% FRN 10/25/29		20,895		20,904
Federal National Mortgage Association Connecticut Avenue Securities Trust
Series 2018-C01, Class 1ED2, 1 mo. USD LIBOR + .850% 0.953% FRN 7/25/30		256,644		256,644
Series 2018-C03, Class 1EB2, 1 mo. USD LIBOR + .850% 0.953% FRN 10/25/30		440,000		439,522
Series 2018-C03, Class 1ED2, 1 mo. USD LIBOR + .850% 0.953% FRN 10/25/30		318,273		312,631
Series 2017-C04, Class 2ED2, 1 mo. USD LIBOR + 1.100% 1.203% FRN 11/25/29		356,741		357,178
Series 2017-C05, Class 1ED3, 1 mo. USD LIBOR + 1.200% 1.303% FRN 1/25/30		218,116		217,855
Series 2017-C02, Class 2ED3, 1 mo. USD LIBOR + 1.350% 1.453% FRN 9/25/29		27,473		27,700
Series 2017-C06, Class 1M2B, 1 mo. USD LIBOR + 2.650% 2.753% FRN 2/25/30		205,000		208,158
				2,536,655
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $2,620,432)				2,614,918

MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
U.S. TREASURY OBLIGATIONS — 89.7%
U.S. Treasury Bonds & Notes — 89.7%
U.S. Treasury Bond
1.875% 11/15/51	$	2,855,000	$	2,834,480
U.S. Treasury Inflation Index
0.125% 4/15/22		6,696,989		6,795,293
0.125% 1/15/23		9,942,469		10,268,574
0.125% 10/15/24		17,961,086		19,185,737
0.125% 4/15/25		32,777,503		35,066,166
0.125% 10/15/25		20,177,774		21,755,345
0.125% 4/15/26		7,722,636		8,335,470
0.125% 10/15/26		23,803,698		25,889,311
0.125% 7/15/31		5,633,956		6,335,559
0.250% 1/15/25		12,472,335		13,363,669
0.375% 7/15/23		27,132,785		28,529,169
0.375% 7/15/25		5,818,490		6,320,448
0.375% 1/15/27		4,235,427		4,659,549
0.500% 4/15/24		14,449,411		15,403,581
0.625% 4/15/23		2,003,796		2,094,720
0.625% 1/15/24 (e)		25,434,424		27,068,784
0.625% 1/15/26		23,772,676		26,112,799
U.S. Treasury Note
0.750% 8/31/26 (e)		7,820,000		7,648,939
1.250% 11/30/26		843,000		843,138
1.375% 11/15/31		3,901,100		3,852,336
				272,363,067
TOTAL U.S. TREASURY OBLIGATIONS (Cost $271,236,525)				272,363,067
TOTAL BONDS & NOTES (Cost $299,378,708)				302,797,666
TOTAL LONG-TERM INVESTMENTS (Cost $299,378,708)				302,797,666
	Number of Shares
SHORT-TERM INVESTMENTS — 0.4%
Mutual Fund — 0.0%
T. Rowe Price Government Reserve Investment Fund		574		574
	Principal Amount
Repurchase Agreement — 0.4%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (f)	$	1,083,282		1,083,282
TOTAL SHORT-TERM INVESTMENTS (Cost $1,083,856)				1,083,856
TOTAL INVESTMENTS — 100.1% (Cost $300,462,564) (g)				303,881,522
Other Assets/(Liabilities) — (0.1)%				(285,420)
NET ASSETS — 100.0%			$	303,596,102

Abbreviation Legend

FRN Floating Rate Note

STEP Step Up Bond

VRN Variable Rate Note

MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund —  Portfolio of Investments (Continued)

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At December 31, 2021, the aggregate market value of these securities amounted to $21,403,896 or 7.05% of net assets.

(b) Denotes all or a portion of security on loan. The total value of securities on loan as of December 31, 2021, was $307,974 or 0.10% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $319,567 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) 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 December 31, 2021.

(d) 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.

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

(f) Maturity value of $1,083,282. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $1,104,972.

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

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	1/21/22		131.50		46	USD	6,001,563	$	(8,625)	$	(17,177)	$	8,552
Put
U.S. Treasury Note 10 Year Future	1/21/22		130.00		46	USD	6,001,563	$	(17,969)	$	(22,200)	$	4,231
U.S. Treasury Note 10 Year Future	2/18/22		129.50		47	USD	6,132,031		(25,703)		(27,089)		1,386
								$	(43,672)	$	(49,289)	$	5,617
								$	(52,297)	$	(66,466)	$	14,169

MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund —  Portfolio of Investments (Continued)

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
Bank of America N.A.	1/21/22	NOK	9,846,141	USD	1,082,612	$	35,092
Bank of America N.A.	1/21/22	USD	590,090	NOK	5,366,141		(19,058)
Citibank N.A.	1/21/22	AUD	1,525,415	USD	1,085,180		24,687
Citibank N.A.	1/21/22	USD	505,452	NZD	720,000		12,409
Citibank N.A.	1/21/22	USD	589,097	AUD	830,415		(15,100)
Citibank N.A.	2/25/22	USD	508,562	GBP	380,000		(5,689)
Goldman Sachs International	1/21/22	USD	504,540	CAD	635,000		2,552
Goldman Sachs International	1/21/22	USD	507,361	NOK	4,480,000		(1,195)
Goldman Sachs International	2/25/22	GBP	805,297	USD	1,068,155		21,647
Goldman Sachs International	2/25/22	EUR	1,345,000	USD	1,526,286		6,592
Goldman Sachs International	2/25/22	USD	566,345	GBP	425,297		(9,206)
HSBC Bank USA	1/21/22	NZD	1,587,394	USD	1,075,274		11,745
HSBC Bank USA	1/21/22	USD	590,131	CAD	756,619		(8,001)
Morgan Stanley & Co. LLC	1/21/22	CAD	1,391,619	USD	1,098,549		1,572
Morgan Stanley & Co. LLC	2/25/22	EUR	1,338,671	USD	1,514,063		11,602
Morgan Stanley & Co. LLC	2/25/22	USD	505,637	EUR	440,000		4,175
UBS AG	1/21/22	USD	507,513	AUD	695,000		1,842
UBS AG	1/21/22	USD	589,852	NZD	867,394		(4,124)
UBS AG	2/25/22	EUR	440,000	USD	501,375		87
						$	71,629

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Long Bond	3/22/22		65	$	10,511,710	$	(83,272)
Short
U.S. Treasury Note 10 Year	3/22/22		4	$	(521,617)	$	(258)
U.S. Treasury Ultra 10 Year	3/22/22		27		(3,905,258)		(48,555)
U.S. Treasury Note 2 Year	3/31/22		63		(13,742,186)		(2,642)
U.S. Treasury Note 5 Year	3/31/22		224		(27,057,065)		(41,685)
						$	(93,140)

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)

Fixed 1.60%

Maturity

U.S. Consumer Price Index

Maturity

Bank of America N.A.

2/21/23

USD

3,638,000

$

237,917

$

—

$

237,917

Fixed 1.66%

Maturity

U.S. Consumer Price Index

Maturity

Barclays Bank PLC

7/08/22

USD

1,250,000

74,072

—

74,072

Fixed 1.74%

Maturity

U.S. Consumer Price Index

Maturity

Barclays Bank PLC

12/16/22

USD

2,800,000

174,152

—

174,152

Fixed 1.42%

Maturity

U.S. Consumer Price Index

Maturity

Citibank N.A.

10/07/22

USD

3,420,000

245,478

—

245,478

Fixed 1.43%

Maturity

U.S. Consumer Price Index

Maturity

Citibank N.A.

10/08/22

USD

1,710,000

122,140

—

122,140

Fixed 1.44%

Maturity

U.S. Consumer Price Index

Maturity

Citibank N.A.

10/08/22

USD

1,710,000

122,087

—

122,087

Fixed 1.59%

Maturity

U.S. Consumer Price Index

Maturity

Citibank N.A.

2/18/23

USD

1,311,000

85,751

—

85,751

Fixed 1.60%

Maturity

U.S. Consumer Price Index

Maturity

Citibank N.A.

2/18/23

USD

1,789,000

116,823

—

116,823

Fixed 1.59%

Maturity

U.S. Consumer Price Index

Maturity

Citibank N.A.

2/20/23

USD

2,867,000

188,164

—

188,164

Fixed 1.49%

Maturity

U.S. Consumer Price Index

Maturity

Citibank N.A.

2/26/23

USD

2,061,000

142,099

—

142,099

Fixed 1.61%

Maturity

U.S. Consumer Price Index

Maturity

Goldman Sachs International

2/21/23

USD

2,993,000

195,274

—

195,274

Fixed 1.57%

Maturity

U.S. Consumer Price Index

Maturity

HSBC Bank USA

2/25/23

USD

2,241,000

149,069

—

149,069

Fixed 3.14%

Maturity

U.S. Consumer Price Index

Maturity

JP Morgan Chase Bank N.A.

8/03/23

USD

4,650,000

102,996

—

102,996

Fixed 2.30%

Maturity

U.S. Consumer Price Index

Maturity

JP Morgan Chase Bank N.A.

2/22/24

USD

5,500,000

336,840

—

336,840

Fixec 2.96%

Maturity

U.S. Consumer Price Index

Maturity

JP Morgan Chase Bank N.A.

8/02/24

USD

5,501,000

143,402

—

143,402

Fixed 2.95%

Maturity

U.S. Consumer Price Index

Maturity

JP Morgan Chase Bank N.A.

8/03/24

USD

3,133,000

81,631

—

81,631

Fixed 2.94%

Maturity

U.S. Consumer Price Index

Maturity

JP Morgan Chase Bank N.A.

8/03/24

USD

1,567,000

41,681

—

41,681

Fixed 2.94%

Maturity

U.S. Consumer Price Index

Maturity

JP Morgan Chase Bank N.A.

8/03/24

USD

2,200,000

58,519

—

58,519

Fixed 2.29%

Maturity

U.S. Consumer Price Index

Maturity

UBS AG

6/05/23

USD

1,700,000

73,673

—

73,673

$

2,691,768

$

—

$

2,691,768

Currency Legend

AUD Australian Dollar

CAD Canadian Dollar

EUR Euro

GBP British Pound

NOK Norwegian Krone

NZD New Zealand Dollar

USD U.S. Dollar

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 93.7%
COMMON STOCK — 92.8%
Australia — 7.9%
ALS Ltd.		148,435	$	1,413,317
BHP Group Ltd. (a)		191,533		5,796,741
Centuria Office REIT		101,068		172,206
Goodman Group		33,727		651,277
IGO Ltd.		91,182		764,569
Northern Star Resources Ltd.		255,874		1,753,798
OZ Minerals Ltd.		42,514		877,021
Perseus Mining Ltd.		1,186,691		1,400,431
Rio Tinto Ltd.		11,911		870,252
Scentre Group		195,818		450,356
Tietto Minerals Ltd. (b)		525,419		189,564
				14,339,532
Austria — 0.2%
Mayr Melnhof Karton AG		1,577		317,208
Belgium — 0.0%
Azelis Group NV (b)		2,858		82,041
Bermuda — 0.3%
Hongkong Land Holdings Ltd.		106,400		552,902
Brazil — 0.4%
Vale SA		48,257		676,241
Canada — 5.1%
Canadian Apartment Properties		6,165		292,228
Canadian National Railway Co.		1,407		172,829
Canadian Natural Resources Ltd.		6,414		271,021
Canadian Pacific Railway Ltd.		2,487		178,915
Dundee Precious Metals, Inc.		21,590		133,471
Enbridge, Inc.		5,645		220,607
Enerflex Ltd.		27,500		166,528
ERO Copper Corp. (b)		48,827		744,979
Franco-Nevada Corp.		3,408		471,319
K92 Mining, Inc. (b)		122,180		694,473
Karora Resources, Inc. (b)		88,138		296,128
Magna International, Inc. (a)		1,115		90,248
Pan American Silver Corp.		5,930		148,072
Rhyolite Resources Ltd., PIPE Shares (Acquired 12/20/21,Cost $145,618) (b) (c) (d)		214,075		147,912
Summit Industrial Income REIT		49,448		918,636
TC Energy Corp.		9,689		450,926
Victoria Gold Corp. (b)		96,608		1,088,315
Wesdome Gold Mines Ltd. (b)		245,672		2,235,412
West Fraser Timber Co. Ltd.		2,423		231,161

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

	Number of Shares		Value
Wheaton Precious Metals Corp.		4,533	$	194,515
				9,147,695
Cayman Islands — 0.4%
Bluescape Opportunities Acquisition Corp. (b)		11,882		120,721
China Resources Mixc Lifestyle Services Ltd. (e)		49,400		230,319
Huazhu Group Ltd. ADR (b)		7,519		280,760
				631,800
Denmark — 0.2%
ROCKWOOL International A/S Class B		755		330,451
Finland — 1.4%
Kojamo OYJ		26,255		634,547
Metso Outotec OYJ		101,537		1,079,965
Stora Enso OYJ Class R		13,773		250,466
UPM-Kymmene OYJ		15,254		576,500
				2,541,478
France — 2.6%
Air Liquide SA		2,618		456,517
Constellium SE (b)		34,964		626,205
Gecina SA		1,458		203,930
Legrand SA		3,156		369,361
Safran SA		654		80,323
Schneider Electric SE		2,359		462,480
TotalEnergies SE		42,179		2,142,304
Verallia SA (e)		10,353		364,817
				4,705,937
Germany — 0.5%
Infineon Technologies AG		3,355		155,568
Vonovia SE		13,997		772,865
				928,433
Hong Kong — 0.4%
Sun Hung Kai Properties Ltd.		59,000		716,225
Ireland — 0.7%
Linde PLC		3,462		1,199,341
Japan — 2.4%
Bridgestone Corp.		2,400		103,268
Daiwa Office Investment Corp.		59		359,370
Heiwa Real Estate Co. Ltd.		7,300		245,617
Hoshino Resorts REIT, Inc.		26		147,599
Industrial & Infrastructure Fund Investment Corp.		259		500,033
Kyoritsu Maintenance Co. Ltd.		10,300		361,346
Mitsui Fudosan Co. Ltd.		39,000		772,562
Mitsui Fudosan Logistics Park, Inc.		83		465,399
Nippon Steel Corp.		34,900		570,784
Recruit Holdings Co. Ltd.		2,000		121,238
Shin-Etsu Chemical Co. Ltd.		1,500		259,792
SUMCO Corp.		10,300		208,545

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

	Number of Shares		Value
Tokyo Tatemono Co. Ltd.		15,900	$	232,246
				4,347,799
Kazakhstan — 0.4%
NAC Kazatomprom JSC		17,098		627,794
Luxembourg — 0.2%
Ardagh Metal Packaging SA (b)		7,090		64,023
Shurgard Self Storage SA		5,206		340,801
				404,824
Mexico — 0.4%
Grupo Mexico SAB de CV Series B		159,075		693,465
Netherlands — 0.8%
Akzo Nobel NV		5,593		615,675
CTP NV (e)		18,576		395,253
Koninklijke DSM NV		1,926		432,441
				1,443,369
Norway — 1.1%
Aker BP ASA		10,579		324,958
Equinor ASA		48,399		1,276,966
Norsk Hydro ASA		50,913		401,014
				2,002,938
Portugal — 0.4%
Galp Energia SGPS SA		82,488		799,881
Russia — 1.3%
Alrosa PJSC		737,090		1,198,777
MMC Norilsk Nickel PJSC		1,943		590,149
Polyus PJSC		3,279		570,754
				2,359,680
Singapore — 0.6%
CapitaLand Mall Trust		276,300		418,460
Daiwa House Logistics Trust (b)		320,900		190,502
Digital Core REIT Management Pte Ltd. (b)		380,300		441,148
				1,050,110
South Africa — 0.2%
Impala Platinum Holdings Ltd.		8,324		117,567
Sibanye Stillwater Ltd.		101,782		314,524
				432,091
Spain — 0.4%
Cellnex Telecom SA (e)		5,296		307,486
Iberdrola SA		22,251		260,748
Inmobiliaria Colonial SA		21,714		203,959
				772,193

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

	Number of Shares		Value
Sweden — 5.3%
Atlas Copco AB Class B		3,879	$	226,413
Boliden AB		70,032		2,714,837
Epiroc AB Class A		76,818		1,947,569
Epiroc AB Class B		22,153		469,792
Fabege AB		23,492		391,920
Granges AB		64,148		753,849
Hexpol AB		16,290		218,812
Lundin Energy AB		14,567		522,407
Sandvik AB		75,811		2,118,147
Svenska Cellulosa AB Class B		15,198		269,217
				9,632,963
United Kingdom — 5.1%
Anglo American PLC		18,787		769,006
Antofagasta PLC		29,226		531,233
BHP Group PLC		77,265		2,302,690
Big Yellow Group PLC		11,563		266,769
Croda International PLC		3,502		480,299
Derwent London PLC		13,056		603,161
Great Portland Estates PLC		48,197		474,244
Mondi PLC		23,919		589,407
Rio Tinto PLC		17,699		1,166,916
The UNITE Group PLC		15,495		232,544
The Weir Group PLC		61,028		1,407,936
Whitbread PLC (b)		8,526		344,382
				9,168,587
United States — 54.1%
3M Co.		564		100,183
Acadia Realty Trust		66,973		1,462,021
AGCO Corp.		2,237		259,537
Agree Realty Corp.		145		10,347
Air Products & Chemicals, Inc.		2,174		661,461
Alamo Group, Inc.		1,233		181,473
Alaska Air Group, Inc. (b)		4,413		229,917
Albemarle Corp.		4,991		1,166,746
Alexandria Real Estate Equities, Inc.		12,175		2,714,538
Allegiant Travel Co. (b)		1,486		277,941
Ameren Corp.		4,290		381,853
American Campus Communities, Inc.		24,188		1,385,730
Apartment Income REIT Corp.		14,440		789,435
Apple Hospitality REIT, Inc.		77,694		1,254,758
AvalonBay Communities, Inc.		10,827		2,734,792
Avery Dennison Corp.		1,912		414,082
Ball Corp.		3,908		376,223
BWX Technologies, Inc.		1,513		72,442
Cactus, Inc. Class A		7,244		276,214
Camden Property Trust		20,526		3,667,586
Caterpillar, Inc.		11,350		2,346,499
CF Industries Holdings, Inc.		3,417		241,855
ChampionX Corp. (b)		10,697		216,186
Chevron Corp.		11,218		1,316,432
CMS Energy Corp.		5,048		328,372
ConocoPhillips		26,458		1,909,738
Copart, Inc. (b)		758		114,928

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

	Number of Shares		Value
CoStar Group, Inc. (b)		1,000	$	79,030
CSX Corp.		5,328		200,333
CubeSmart		42,092		2,395,456
Darling Ingredients, Inc. (b)		5,056		350,330
Deere & Co.		1,321		452,958
Delta Air Lines, Inc. (b)		6,020		235,262
Devon Energy Corp.		24,018		1,057,993
Dominion Energy, Inc.		5,095		400,263
Douglas Emmett, Inc.		44,498		1,490,683
EastGroup Properties, Inc.		5,013		1,142,212
Element Solutions, Inc.		18,068		438,691
Entegris, Inc.		3,384		468,955
EOG Resources, Inc.		14,201		1,261,475
EPR Properties		1,365		64,824
Equinix, Inc.		4,425		3,742,842
Equity LifeStyle Properties, Inc.		31,060		2,722,720
Equity Residential		29,981		2,713,280
Essential Properties Realty Trust, Inc.		1,944		56,046
Essex Property Trust, Inc.		7,312		2,575,506
Federal Realty Investment Trust		3,903		532,057
Frontier Group Holdings, Inc. (b)		16,209		219,956
Halliburton Co.		7,152		163,566
Healthcare Realty Trust, Inc.		21,390		676,780
Healthcare Trust of America, Inc. Class A		20,268		676,749
Hess Corp.		4,276		316,552
Highwoods Properties, Inc.		7,413		330,546
Hilton Worldwide Holdings, Inc. (b)		1,821		284,058
Host Hotels & Resorts, Inc. (b)		20,807		361,834
The Howard Hughes Corp. (b)		7,535		766,912
Hubbell, Inc.		2,332		485,686
IDACORP, Inc.		1,622		183,789
Innovative Industrial Properties, Inc.		72		18,930
International Paper Co.		12,267		576,304
JetBlue Airways Corp. (b)		16,441		234,120
Kadant, Inc.		1,110		255,833
Kilroy Realty Corp.		15,686		1,042,492
Kimco Realty Corp.		44,657		1,100,795
Knight-Swift Transportation Holdings, Inc.		2,234		136,140
Leidos Holdings, Inc.		863		76,721
Lockheed Martin Corp.		262		93,117
LXP Industrial Trust		923		14,417
Magnolia Oil & Gas Corp. Class A		20,307		383,193
Marriott International, Inc. Class A (b)		5,496		908,159
Martin Marietta Materials, Inc.		3,471		1,529,045
National Retail Properties, Inc.		1,839		88,401
NextEra Energy, Inc.		3,419		319,198
Norfolk Southern Corp.		1,977		588,573
Northrop Grumman Corp.		328		126,959
Nucor Corp.		8,063		920,391
Old Dominion Freight Line, Inc.		417		149,444
Orion Office REIT, Inc. (b)		523		9,764
Packaging Corp. of America		6,033		821,393
Pebblebrook Hotel Trust		44,915		1,004,749
Pioneer Natural Resources Co.		5,602		1,018,892
PPG Industries, Inc.		3,222		555,602
Prologis, Inc.		34,838		5,865,326
PS Business Parks, Inc.		5,597		1,030,799
Public Storage		6,382		2,390,442

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

	Number of Shares		Value
Quaker Chemical Corp.		1,035	$	238,857
Quanta Services, Inc.		2,341		268,419
Rayonier, Inc.		2,285		92,223
Realty Income Corp.		5,231		374,487
Regency Centers Corp.		15,013		1,131,230
Reliance Steel & Aluminum Co.		14,527		2,356,570
Rexford Industrial Realty, Inc.		22,424		1,818,811
Rockwell Automation, Inc.		397		138,493
Roper Technologies, Inc.		252		123,949
Royal Gold, Inc.		1,343		141,297
RPM International, Inc.		7,849		792,749
Sanderson Farms, Inc.		1,040		198,723
SBA Communications Corp.		1,806		702,570
Sempra Energy		2,319		306,757
The Sherwin-Williams Co.		4,004		1,410,049
Shoals Technologies Group, Inc. Class A (b)		13,699		332,886
Simon Property Group, Inc.		10,140		1,620,068
SL Green Realty Corp.		8,939		640,926
Southern Copper Corp.		10,709		660,852
Southwest Airlines Co. (b)		4,899		209,873
Spirit Realty Capital, Inc.		596		28,721
Steel Dynamics, Inc.		18,446		1,144,943
STORE Capital Corp.		3,555		122,292
Sun Country Airlines Holdings, Inc. (b)		6,936		189,006
Sunstone Hotel Investors, Inc. (b)		61,719		723,964
Sylvamo Corp. (b)		78		2,175
Terreno Realty Corp.		18,892		1,611,299
The Timken Co.		2,677		185,489
Union Pacific Corp.		2,196		553,238
United Airlines Holdings, Inc. (b)		5,273		230,852
Verisk Analytics, Inc.		659		150,733
Vulcan Materials Co.		6,588		1,367,537
WEC Energy Group, Inc.		3,935		381,970
Welltower, Inc.		39,983		3,429,342
WestRock Co.		6,081		269,753
WP Carey, Inc.		4,428		363,317
Xcel Energy, Inc.		5,778		391,171
				97,703,423
TOTAL COMMON STOCK (Cost $136,061,703)				167,608,401
PREFERRED STOCK — 0.9%
United States — 0.9%
Jetti Holdings, Inc., Series C, (Acquired 5/24/21-6/30/21, Cost $130,426)
(b) (c) (d) (f)		2,253		130,426
Lilac Solutions, Inc., Series B, (Acquired 9/08/21,Cost $329,342)
(b) (c) (d) (f)		25,087		329,342
NextEra Energy, Inc. Convertible 5.279% (a)		10,074		579,658
The Southern Co. Convertible 6.750%		10,111		543,467
				1,582,893
TOTAL PREFERRED STOCK (Cost $1,354,476)				1,582,893
TOTAL EQUITIES (Cost $137,416,179)				169,191,294

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

	Number of Shares		Value
MUTUAL FUNDS — 8.1%
United States — 8.1%
SPDR Dow Jones REIT ETF (a)		3,475	$	424,506
SPDR S&P Homebuilders ETF (a)		27,868		2,390,517
SPDR S&P Oil & Gas Exploration & Production ETF (a)		38,914		3,730,685
State Street Navigator Securities Lending Government Money Market Portfolio (g)		6,809,829		6,809,829
VanEck Gold Miners ETF		26,150		837,584
VanEck Oil Services ETF (a)		1,758		324,949
				14,518,070
TOTAL MUTUAL FUNDS (Cost $12,701,662)				14,518,070
TOTAL LONG-TERM INVESTMENTS (Cost $150,117,841)				183,709,364
SHORT-TERM INVESTMENTS — 2.0%
Mutual Fund — 1.0%
T. Rowe Price Government Reserve Investment Fund		1,865,474		1,865,473
	Principal Amount
Repurchase Agreement — 0.8%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (h)	$	1,499,835		1,499,835
U.S. Treasury Bill — 0.2%
U.S. Treasury Bill
0.169% 6/23/22 (i) (j)		390,000		389,690
TOTAL SHORT-TERM INVESTMENTS (Cost $3,754,997)				3,754,998
TOTAL INVESTMENTS — 103.8% (Cost $153,872,838) (k)				187,464,362
Other Assets/(Liabilities) — (3.8)%				(6,854,323)
NET ASSETS — 100.0%			$	180,610,039

Abbreviation Legend

ADR American Depositary Receipt

ETF Exchange-Traded Fund

PIPE Private Investment in Public Equity

REIT Real Estate Investment Trust

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 December 31, 2021, was $12,773,135 or 7.07% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $6,405,302 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) Restricted security. Certain securities are restricted as to resale. At December 31, 2021, these securities amounted to a value of $607,680 or 0.34% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

(d) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At December 31, 2021, these securities amounted to a value of $607,680 or 0.34% of net assets.

(e) Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At December 31, 2021, the aggregate market value of these securities amounted to $1,297,875 or 0.72% of net assets.

(f) Investment was valued using significant unobservable inputs.

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

(h) Maturity value of $1,499,835. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $1,529,924.

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

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

(k) 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 TSX 60 Index	3/17/22		6	$	1,195,998	$	19,133
Russell 2000 E Mini Index	3/18/22		23		2,553,438		25,782
Xae Energy	3/18/22		30		1,752,247		(20,047)
						$	24,868
Short
Nasdaq 100 E Mini Index	3/18/22		8	$	(2,598,167)	$	(13,153)
U.S. Treasury Note 10 Year	3/22/22		20		(2,601,378)		(7,997)
U.S. Treasury Ultra Bond	3/22/22		3		(581,925)		(9,450)
						$	(30,600)

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
EQUITIES — 96.6%
COMMON STOCK — 94.6%
Basic Materials — 3.9%
Chemicals — 1.0%
AgroFresh Solutions, Inc. (a)		66,618	$	132,570
American Vanguard Corp.		15,320		251,095
Element Solutions, Inc.		97,615		2,370,092
Hawkins, Inc.		9,418		371,540
Minerals Technologies, Inc.		11,890		869,754
Oil-Dri Corp. of America		2,466		80,712
Orion Engineered Carbons SA (a)		34,206		628,022
PPG Industries, Inc.		5,751		991,702
Quaker Chemical Corp.		5,966		1,376,834
RPM International, Inc.		14,000		1,414,000
Westlake Chemical Corp.		11,901		1,155,944
				9,642,265
Forest Products & Paper — 0.2%
Clearwater Paper Corp. (a)		16,442		602,928
West Fraser Timber Co. Ltd.		10,917		1,041,514
				1,644,442
Iron & Steel — 0.1%
Carpenter Technology Corp.		18,338		535,286
Reliance Steel & Aluminum Co.		3,660		593,725
				1,129,011
Mining — 2.6%
AngloGold Ashanti Ltd. Sponsored ADR (b)		93,883		1,969,665
Cameco Corp.		170,742		3,723,883
Centerra Gold, Inc.		17,685		136,313
Cia de Minas Buenaventura SA Sponsored ADR (a) (b)		202,441		1,481,868
Constellium SE (a)		106,239		1,902,741
ERO Copper Corp. (a)		66,223		1,010,399
Franco-Nevada Corp.		37,556		5,193,918
Freeport-McMoRan, Inc.		71,550		2,985,782
Fresnillo PLC		184,544		2,226,813
Gold Fields Ltd. Sponsored ADR (b)		148,275		1,629,542
Kirkland Lake Gold Ltd.		7,544		316,471
NAC Kazatomprom JSC		222		8,151
NAC Kazatomprom JSC GDR		37,048		1,361,514

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

	Number of Shares		Value
Northern Star Resources Ltd.		69,754	$	478,104
				24,425,164
				36,840,882
Communications — 4.2%
Advertising — 0.2%
Advantage Solutions, Inc. (a) (b)		67,743		543,299
Boston Omaha Corp. Class A (a)		21,428		615,626
The Trade Desk, Inc. Class A (a)		7,900		723,956
				1,882,881
Internet — 1.6%
1stdibs.com, Inc. (a)		4,952		61,949
Bumble, Inc. (a)		3,923		132,833
Deliveroo PLC Class A (a) (c)		78,716		222,387
DoorDash, Inc., Class A (a)		2,100		312,690
Etsy, Inc. (a)		6,900		1,510,686
Farfetch Ltd. Class A (a)		14,712		491,822
Figs, Inc. Class A (a)		56,899		1,568,136
Grab Holdings Ltd. (a)		12,829		91,471
Grab Holdings, Ltd., PIPE Shares (Acquired 4/13/21, Cost $166,460) (a) (d) (e)		16,646		118,686
IAC/InterActiveCorp (a)		7,500		980,325
Match Group, Inc. (a)		6,000		793,500
MYT Netherlands Parent BV (a) (b)		3,743		79,389
Nextdoor Holdings, Inc. (a)		8,013		63,222
Okta, Inc. (a)		17,486		3,919,837
Open Lending Corp. Class A (a)		14,695		330,344
Opendoor Technologies, Inc. (a)		32,189		470,281
Poshmark, Inc. Class A (a)		3,410		58,072
RealReal, Inc. (a)		19,935		231,445
Rover Group, Inc., Earnout Shares 16.00 (Acquired 8/02/21, Cost $0) (a) (d) (e) (f)		15,883		1,542
Rover Group, Inc., Lockup Shares (Acquired 5/11/18-5/25/18, Cost $114,384) (a) (d) (e)		18,121		167,846
Spotify Technology SA (a)		8,300		1,942,449
Upwork, Inc. (a)		36,062		1,231,878
Vimeo, Inc. (a)		21,660		389,014
				15,169,804
Media — 2.0%
Cable One, Inc.		2,945		5,193,360
DISH Network Corp. Class A (a)		34,610		1,122,748
Fox Corp. Class A		39,142		1,444,340
Liberty Broadband Corp. Class C (a)		2,319		373,591
Liberty Media Corp-Liberty Formula One Class C (a)		26,200		1,656,888
News Corp. Class A		225,150		5,023,097
Saga Communications, Inc. Class A		5,561		133,520
Scholastic Corp.		49,588		1,981,536
Thryv Holdings, Inc. (a)		2,396		98,547
ViacomCBS, Inc. Class B		60,648		1,830,357
				18,857,984

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

	Number of Shares		Value
Telecommunications — 0.4%
Corning, Inc.		45,400	$	1,690,242
Harmonic, Inc. (a)		134,342		1,579,862
Infinera Corp. (a)		7,522		72,136
Telephone & Data Systems, Inc.		22,158		446,484
				3,788,724
				39,699,393
Consumer, Cyclical — 9.5%
Airlines — 0.3%
Allegiant Travel Co. (a)		963		180,120
Southwest Airlines Co. (a)		56,272		2,410,692
Sun Country Airlines Holdings, Inc. (a)		11,909		324,520
				2,915,332
Apparel — 0.7%
Allbirds, Inc. (a) (b)		8,059		121,530
Allbirds, Inc., Class B Lockup Shares (Acquired 10/09/18- 9/22/20, Cost $378,640) (a) (d) (e)		34,112		488,689
Capri Holdings Ltd. (a)		12,829		832,730
Deckers Outdoor Corp. (a)		1,500		549,465
On Holding AG, Class A (a)		6,600		249,546
Ralph Lauren Corp.		19,433		2,309,806
Skechers U.S.A., Inc. Class A (a)		12,300		533,820
Steven Madden Ltd.		16,124		749,282
VF Corp.		7,200		527,184
				6,362,052
Auto Manufacturers — 1.3%
Blue Bird Corp. (a)		14,598		228,313
PACCAR, Inc.		37,253		3,287,950
Rivian Automotive, Inc. Class A (a)		4,199		435,394
Rivian Automotive, Inc., Lockup Shares (Acquired 12/23/19 - 1/19/21, Cost $1,242,527) (a) (d) (e)		79,743		7,855,124
				11,806,781
Auto Parts & Equipment — 0.3%
Aptiv PLC (a)		4,500		742,275
Aurora Innovation, Inc., Lockup Shares (Acquired 3/01/19, Cost $32,154) (a) (d) (e)		7,554		80,805
Dorman Products, Inc. (a)		6,583		743,945
Gentherm, Inc. (a)		6,574		571,281
Meritor, Inc. (a)		22,543		558,615
Visteon Corp. (a)		4,088		454,340
				3,151,261
Distribution & Wholesale — 0.5%
Pool Corp.		975		551,850
SiteOne Landscape Supply, Inc. (a) (b)		14,584		3,533,412
thredUP, Inc. (a) (b)		17,618		224,806
Univar Solutions, Inc. (a)		26,210		743,053
				5,053,121

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

	Number of Shares		Value
Entertainment — 0.7%
Cinemark Holdings, Inc. (a)		16,881	$	272,122
DraftKings, Inc. Class A (a)		15,000		412,050
Genius Sports Ltd. (a)		12,277		93,305
Madison Square Garden Sports Corp. (a)		3,099		538,389
Marriott Vacations Worldwide Corp.		4,801		811,273
Red Rock Resorts, Inc. Class A		3,436		189,014
Vail Resorts, Inc.		12,333		4,043,991
				6,360,144
Food Services — 0.1%
Compass Group PLC (a)		54,652		1,217,443
Home Builders — 0.5%
Cavco Industries, Inc. (a)		5,408		1,717,851
Horizon Global Corp. (a)		39,691		316,734
LCI Industries		3,806		593,241
Meritage Home Corp. (a)		10,561		1,289,076
Skyline Champion Corp. (a)		12,658		999,729
				4,916,631
Leisure Time — 0.1%
Drive Shack, Inc. (a)		34,510		49,349
Peloton Interactive, Inc. Class A (a)		6,625		236,910
Rad Power Bikes, Inc., Class A (Acquired 1/22/21, Cost $69,082) (a) (d) (e) (f)		14,321		137,250
				423,509
Lodging — 0.6%
Hilton Worldwide Holdings, Inc. (a)		23,500		3,665,765
MGM Resorts International		39,200		1,759,296
				5,425,061
Retail — 4.3%
Aspen Aerogels, Inc. (a)		3,113		154,996
Bath & Body Works, Inc.		10,500		732,795
Beacon Roofing Supply, Inc. (a)		20,497		1,175,503
BJ's Restaurants, Inc. (a)		24,678		852,625
Burlington Stores, Inc. (a)		24,719		7,205,836
Casey's General Stores, Inc.		12,000		2,368,200
Chipotle Mexican Grill, Inc. (a)		1,250		2,185,313
Chuy's Holdings, Inc. (a)		13,295		400,445
Denny's Corp. (a)		19,637		314,192
Dollar General Corp.		12,100		2,853,543
Dollar Tree, Inc. (a)		12,700		1,784,604
Domino's Pizza, Inc.		2,950		1,664,774
Dutch Bros, Inc., Class A (a)		7,000		356,370
Fiesta Restaurant Group, Inc. (a)		29,583		325,709
Five Below, Inc. (a)		5,115		1,058,242
Framebridge Future Contingency Payments (Acquired 5/19/20-11/10/20, Cost $27,511) (a) (d) (e) (f)		10,553		3,025
Freshpet, Inc. (a)		1,001		95,365
Hibbett, Inc.		5,671		407,915
Lululemon Athletica, Inc. (a)		1,300		508,885
Lumber Liquidators Holdings, Inc. (a)		28,149		480,503

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

	Number of Shares		Value
O'Reilly Automotive, Inc. (a)		2,700	$	1,906,821
Olaplex Holdings, Inc. (a)		11,957		348,307
Ollie's Bargain Outlet Holdings, Inc. (a) (b)		19,843		1,015,763
Papa John's International, Inc.		20,363		2,717,850
Petco Health & Wellness Co., Inc. (a) (b)		29,112		576,126
Red Robin Gourmet Burgers, Inc. (a)		14,111		233,255
RH (a)		2,356		1,262,675
Ross Stores, Inc.		10,600		1,211,368
Rush Enterprises, Inc. Class A		16,578		922,400
Ruth's Hospitality Group, Inc. (a)		13,150		261,685
Warby Parker, Inc. Class A (a)		60,047		2,795,788
Wingstop, Inc.		5,893		1,018,310
Winmark Corp.		3,151		782,362
				39,981,550
Textiles — 0.1%
Bombas LLC. (Acquired 2/12/21, Cost $183,470) (a) (d) (e) (f)		41,514		330,830
Mohawk Industries, Inc. (a)		3,690		672,244
UniFirst Corp.		356		74,903
				1,077,977
				88,690,862
Consumer, Non-cyclical — 25.1%
Agriculture — 0.6%
Bunge Ltd.		58,331		5,445,782
Pax Labs, Inc., Class A (Acquired 4/18/19, Cost $218,578) (a) (d) (e) (f)		58,048		59,209
				5,504,991
Beverages — 0.6%
The Boston Beer Co., Inc. Class A (a)		5,495		2,775,524
Carlsberg A/S Class B		8,763		1,505,271
Coca-Cola Consolidated, Inc.		1,489		921,974
				5,202,769
Biotechnology — 4.5%
Abcam PLC (a)		40,964		960,918
Abcam PLC Sponsored ADR (a)		8,490		199,939
ACADIA Pharmaceuticals, Inc. (a)		54,782		1,278,612
ADC Therapeutics SA (a)		4,782		96,596
Akero Therapeutics, Inc. (a)		2,540		53,721
Allogene Therapeutics, Inc. (a)		4,711		70,288
Alnylam Pharmaceuticals, Inc. (a)		14,189		2,406,171
Annexon, Inc. (a)		4,827		55,462
Apellis Pharmaceuticals, Inc. (a)		15,149		716,245
Arcutis Biotherapeutics, Inc. (a)		1,908		39,572
Argenx SE ADR (a)		11,403		3,993,217
Ascendis Pharma A/S ADR (a)		10,202		1,372,475
Avidity Biosciences, Inc. (a) (b)		30,464		724,129
BeiGene Ltd. ADR (a)		759		205,636
Bicycle Therapeutics PLC (a)		1,050		63,914
BioMarin Pharmaceutical, Inc. (a)		9,831		868,569
Blueprint Medicines Corp. (a)		13,279		1,422,314
C4 Therapeutics, Inc. (a)		11,015		354,683
Cerevel Therapeutics Holdings, Inc. (a)		19,943		646,552

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

	Number of Shares		Value
Certara, Inc. (a)		9,395	$	267,006
Corteva, Inc.		74,310		3,513,377
CRISPR Therapeutics AG (a) (b)		2,187		165,731
Day One Biopharmaceuticals, Inc. (a) (b)		3,093		52,117
Denali Therapeutics, Inc. (a)		9,199		410,275
DICE Therapeutics, Inc. (a)		3,144		79,575
Entrada Therapeutics, Inc. (a)		3,453		59,115
Exelixis, Inc. (a)		30,413		555,950
Exscientia Plc (a) (b)		1,673		33,058
Fate Therapeutics, Inc. (a)		8,080		472,761
Generation Bio Co., (a)		24,766		175,343
Global Blood Therapeutics, Inc. (a)		13,268		388,354
Homology Medicines, Inc. (a)		8,680		31,595
Icosavax, Inc. (a)		10,322		236,167
IGM Biosciences, Inc. (a)		8,038		235,755
Imago Biosciences, Inc. (a)		1,216		28,831
Imago Biosciences, Inc., Lockup Shares (Acquired 11/12/20, Cost $31,278) (a) (d) (e)		3,082		69,421
Incyte Corp. (a)		16,317		1,197,668
Insmed, Inc. (a)		50,161		1,366,386
Ionis Pharmaceuticals, Inc. (a)		30,434		926,107
Iovance Biotherapeutics, Inc. (a)		7,175		136,971
IVERIC bio, Inc. (a)		5,965		99,735
Karuna Therapeutics, Inc. (a)		4,792		627,752
Kodiak Sciences, Inc. (a)		20,231		1,715,184
Kronos Bio, Inc. (a)		3,205		43,556
Kymera Therapeutics, Inc. (a)		11,654		739,912
MeiraGTx Holdings PLC (a)		6,593		156,518
Mirati Therapeutics, Inc. (a)		2,856		418,947
Monte Rosa Therapeutics, Inc. (a)		11,586		236,586
Nkarta, Inc. (a)		8,061		123,736
Nurix Therapeutics, Inc. (a)		15,538		449,825
Olink Holding AB (a) (b)		19,646		357,557
Pacific Biosciences of California, Inc. (Acquired 7/21/21, Cost $160,286) (a) (d) (e)		5,992		116,467
Pardes Biosciences, Inc. Common Stock Usd.0001 (a)		4,736		77,528
Prothena Corp. PLC (a)		22,273		1,100,286
PTC Therapeutics, Inc. (a)		3,901		155,377
Radius Health, Inc. (a)		10,167		70,356
RAPT Therapeutics, Inc. (a)		11,530		423,497
Relay Therapeutics, Inc. (a)		9,610		295,123
Replimune Group, Inc. (a)		17,325		469,507
Rocket Pharmaceuticals, Inc. (a)		7,194		157,045
Sage Therapeutics, Inc. (a)		1,670		71,042
Sana Biotechnology, Inc. (a)		1,857		28,746
Scholar Rock Holding Corp. (a)		17,276		429,136
Seagen, Inc. (a)		15,972		2,469,271
Seer, Inc. (a) (b)		11,352		258,939
Sema4 Holdings Corp. (a) (b)		3,695		16,480
Tenaya Therapeutics, Inc. (a)		8,027		152,112
Tenaya Therapeutics, Inc., Lockup Shares (Acquired 12/17/20, Cost $31,389) (a) (d) (e)		2,524		45,438
Turning Point Therapeutics, Inc. (a)		13,649		651,057
Twist Bioscience Corp. (a)		1,787		138,296
Ultragenyx Pharmaceutical, Inc. (a)		25,980		2,184,658
Xencor, Inc. (a)		20,939		840,073
Zai Lab Ltd. ADR (a)		2,317		145,623
Zentalis Pharmaceuticals, Inc. (a)		12,117		1,018,555

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

	Number of Shares		Value
Zymeworks, Inc. (a) (b)		2,417	$	39,615
				42,254,111
Commercial Services — 5.4%
ABM Industries, Inc.		7,914		323,287
ADT, Inc.		56,432		474,593
Altus Group Ltd. (b)		10,077		565,370
American Public Education, Inc. (a)		15,821		352,017
ASGN, Inc. (a)		2,303		284,190
Booz Allen Hamilton Holding Corp.		54,413		4,613,678
Bright Horizons Family Solutions, Inc. (a)		20,886		2,629,130
The Brink's Co.		6,684		438,270
Cintas Corp.		1,543		683,811
CoStar Group, Inc. (a)		71,579		5,656,888
Equifax, Inc.		7,600		2,225,204
Euronet Worldwide, Inc. (a)		4,791		570,944
FleetCor Technologies, Inc. (a)		10,300		2,305,552
FTI Consulting, Inc. (a)		1,997		306,380
Green Dot Corp. Class A (a)		12,959		469,634
Herc Holdings, Inc.		463		72,483
Huron Consulting Group, Inc. (a)		9,570		477,543
Korn Ferry		11,715		887,177
Legalzoom.com Inc. (a)		27,361		439,691
MarketAxess Holdings, Inc.		6,316		2,597,581
Monro, Inc.		23,425		1,364,975
Multiplan Corp. (a)		117,905		522,319
Paylocity Holding Corp. (a)		18,556		4,382,185
Payoneer Global, Inc. (a)		84,908		624,074
PROG Holdings, Inc. (a)		32,314		1,457,685
Rent the Runway, Inc. Class A (a)		12,575		102,486
Rent the Runway, Inc., Lockup Shares (Acquired 3/21/19 - 4/30/20, Cost $108,185) (a) (d) (e)		5,781		44,759
Rentokil Initial PLC		436,311		3,451,422
Repay Holdings Corp. (a)		13,864		253,295
SEACOR Marine Holdings Inc. (a)		42,525		144,585
Strategic Education, Inc.		27,255		1,576,429
Terminix Global Holdings, Inc. (a)		36,100		1,632,803
Toast, Inc., Class A (a)		6,595		228,913
Toast, Inc., Class B, Lockup Shares (Acquired 6/27/18- 2/14/20, Cost $316,308) (a) (d) (e)		72,297		2,383,957
TransUnion		37,290		4,421,848
Verisk Analytics, Inc.		5,200		1,189,396
				50,154,554
Food — 2.1%
BellRing Brands, Inc. Class A (a)		9,269		264,445
Cal-Maine Foods, Inc.		13,633		504,285
Campbell Soup Co.		61,501		2,672,833
Flowers Foods, Inc.		209,441		5,753,344
Grocery Outlet Holding Corp. (a)		9,999		282,772
The Kraft Heinz Co.		17,397		624,552
Nomad Foods Ltd. (a)		55,710		1,414,477
Post Holdings, Inc. (a)		14,252		1,606,628
The Simply Good Foods Co. (a)		14,899		619,351
Sweetgreen, Inc. (a)		26,414		845,248
Sysco Corp.		41,890		3,290,460
TreeHouse Foods, Inc. (a)		36,229		1,468,361

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

	Number of Shares		Value
Utz Brands, Inc.		47,597	$	759,172
				20,105,928
Food — 0.0%
Sweetgreen, Inc., Lockup Shares (Acquired 2/27/18- 9/13/19, Cost $103,201) (a) (d) (e)		7,919		240,738
Health Care – Products — 5.9%
Adaptive Biotechnologies Corp. (a)		31,876		894,440
Alcon, Inc.		19,000		1,655,280
AtriCure, Inc. (a)		7,750		538,857
Atrion Corp.		1,023		721,113
Avantor, Inc. (a)		86,500		3,645,110
Baxter International, Inc.		40,902		3,511,028
Bruker Corp.		62,393		5,235,397
The Cooper Cos., Inc.		7,500		3,142,050
Cvrx, Inc. (a)		4,148		50,730
Exact Sciences Corp. (a)		20,197		1,571,932
Hanger, Inc. (a)		24,336		441,212
Hologic, Inc. (a)		97,739		7,482,898
ICU Medical, Inc. (a)		8,986		2,132,737
IDEXX Laboratories, Inc. (a)		1,203		792,127
Inari Medical, Inc. (a)		6,297		574,727
Lantheus Holdings, Inc. (a)		8,752		252,845
Nevro Corp. (a)		6,988		566,517
Novocure Ltd. (a)		1,645		123,507
NuVasive, Inc. (a)		5,254		275,730
Ortho Clinical Diagnostics Holdings PLC Class H (a)		58,476		1,250,802
Pacific Biosciences of California, Inc. (a)		7,773		159,036
Penumbra, Inc. (a)		1,612		463,160
PROCEPT BioRobotics Corp. (a)		1,570		39,266
Quanterix Corp. (a)		2,219		94,086
Quidel Corp. (a)		18,173		2,453,173
Rapid Micro Biosystems, Inc., Class A (a)		8,715		92,728
Repligen Corp. (a)		6,535		1,730,729
Sartorius Stedim Biotech		933		510,977
Shockwave Medical, Inc. (a)		4,783		852,952
SomaLogic, Inc. (a)		9,663		112,477
Teleflex, Inc.		12,940		4,250,531
Utah Medical Products, Inc.		2,658		265,800
West Pharmaceutical Services, Inc.		13,773		6,459,675
Zimmer Biomet Holdings, Inc.		20,466		2,600,001
				54,943,630
Health Care – Services — 3.0%
Acadia Healthcare Co., Inc. (a)		31,000		1,881,700
Accolade, Inc. (a) (b)		5,108		134,647
Agiliti, Inc. (a)		22,788		527,770
agilon health, Inc. (a)		7,761		209,547
Amedisys, Inc. (a)		3,997		647,034
Catalent, Inc. (a)		55,764		7,139,465
Centene Corp. (a)		20,351		1,676,922
dentalcorp Holdings Ltd. (a)		18,974		244,047
The Ensign Group, Inc.		8,915		748,503
Eurofins Scientific SE		15,018		1,859,363
Flame Biosciences, Inc. (Acquired 9/28/20, Cost $28,106) (a) (d) (e) (f)		9,173		60,083
Fresenius Medical Care AG & Co. KGaA		4,290		277,903

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

	Number of Shares		Value
Fresenius SE & Co. KGaA		40,919	$	1,649,832
Ginkgo Bioworks Holdings, Inc. (a)		1,715		14,252
Innovage Holding Corp. (a)		11,623		58,115
ModivCare, Inc. (a)		3,955		586,487
Molina Healthcare, Inc. (a)		10,189		3,240,917
The Pennant Group, Inc. (a)		22,888		528,255
Select Medical Holdings Corp.		193,812		5,698,073
Surgery Partners, Inc. (a)		8,218		438,923
U.S. Physical Therapy, Inc.		4,813		459,882
				28,081,720
Household Products & Wares — 0.5%
Avery Dennison Corp.		10,000		2,165,700
Kimberly-Clark Corp.		11,502		1,643,866
Reynolds Consumer Products, Inc.		29,864		937,729
				4,747,295
Pharmaceuticals — 2.5%
Agios Pharmaceuticals, Inc. (a)		8,659		284,621
Alector, Inc. (a)		2,433		50,241
Alkermes PLC (a)		100,391		2,335,095
Arvinas, Inc. (a)		8,885		729,814
Cardinal Health, Inc.		111,006		5,715,699
Centessa Pharmaceuticals PLC (a)		2,356		26,529
Covetrus, Inc. (a)		27,929		557,742
Dentsply Sirona, Inc.		61,131		3,410,499
Elanco Animal Health, Inc. (a)		37,148		1,054,260
G1 Therapeutics, Inc. (a) (b)		3,812		38,921
Galapagos NV (a) (b)		12,927		714,290
Ideaya Biosciences, Inc. (a)		4,901		115,860
Immuneering Corp. Class A (a)		6,924		111,961
Intellia Therapeutics, Inc. (a)		5,009		592,264
Longboard Pharmaceuticals, Inc. (a)		4,121		19,946
Lyell Immunopharma, Inc. (a)		7,284		56,378
Morphic Holding, Inc. (a)		2,272		107,647
Neurocrine Biosciences, Inc. (a)		9,922		845,057
Option Care Health, Inc. (a)		54,343		1,545,515
Patterson Cos., Inc.		114,714		3,366,856
Perrigo Co. PLC		35,134		1,366,713
Reata Pharmaceuticals, Inc. Class A (a) (b)		3,516		92,717
Repare Therapeutics, Inc. (a)		12,961		273,347
uniQure NV (a)		1,829		37,933
				23,449,905
				234,685,641
Diversified — 0.2%
Holding Companies-Diversified — 0.0%
Dynamics Special Purpose Corp., Founders Shares (Acquired 12/22/21, Cost $0) (a) (d) (e)		607		5,387
Dynamics Special Purpose Corp., Restricted Shares (Acquired 5/26/21, Cost $54,620) (a) (d) (e)		5,462		51,163
				56,550

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

	Number of Shares		Value
Holding Company – Diversified — 0.2%
Big Sky Growth Partners, Inc. (a)		32,563	$	318,792
Bluescape Opportunities Acquisition Corp. (a)		30,711		312,024
Conyers Park III Acquisition Corp. (a)		31,244		315,252
KKR Acquisition Holdings I Corp. (a)		24,852		249,017
Post Holdings Partnering Corp. (a)		21,493		214,930
Professional Holding Corp. Class A (a) (b)		14,210		272,263
Revolution Healthcare Acquisition Corp. (a)		8,585		84,562
				1,766,840
				1,823,390
Energy — 3.9%
Energy – Alternate Sources — 0.3%
Array Technologies, Inc. (a)		9,302		145,948
NextEra Energy Partners LP		14,160		1,195,104
REX American Resources Corp. (a)		4,075		391,200
Shoals Technologies Group, Inc. Class A (a)		41,030		997,029
Sunnova Energy International, Inc. (a)		5,939		165,817
				2,895,098
Oil & Gas — 2.3%
Advantage Energy Ltd. (a)		153,490		899,135
APA Corp.		51,494		1,384,674
ARC Resources Ltd. (b)		104,590		950,856
Canadian Natural Resources Ltd. (b)		88,954		3,758,306
Devon Energy Corp.		55,697		2,453,453
Diamondback Energy, Inc.		10,928		1,178,585
EQT Corp. (a)		107,314		2,340,518
Imperial Oil Ltd. (b)		146,725		5,296,772
Kimbell Royalty Partners LP		19,419		264,681
Magnolia Oil & Gas Corp. Class A (b)		103,674		1,956,328
Matador Resources Co.		26,226		968,264
Venture Global LNG, Inc., Series B (Acquired 3/08/18, Cost $33,220) (a) (d) (e) (f)		11		65,452
Venture Global LNG, Inc., Series C (Acquired 3/08/18, Cost $27,180) (a) (d) (e) (f)		9		53,552
				21,570,576
Oil & Gas Services — 1.1%
ChampionX Corp. (a)		38,736		782,855
Enerflex Ltd.		62,335		377,474
Expro Group Holdings NV (a) (b)		119,375		1,713,031
Halliburton Co.		25,153		575,249
Liberty Oilfield Services, Inc. Class A (a)		74,085		718,625
NexTier Oilfield Solutions, Inc. (a)		115,854		411,282
Nov, Inc.		106,235		1,439,484
Ranger Energy Services, Inc. (a)		32,148		330,160
TechnipFMC PLC (a)		442,723		2,620,920
TETRA Technologies, Inc. (a)		44,239		125,639
Tidewater, Inc. (a)		75,369		807,202
				9,901,921

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

	Number of Shares		Value
Pipelines — 0.2%
Equitrans Midstream Corp.		206,737	$	2,137,661
				36,505,256
Financial — 18.5%
Banks — 6.5%
Atlantic Capital Bancshares, Inc. (a)		15,894		457,270
BankUnited, Inc.		54,653		2,312,368
Blue Foundry Bancorp (a)		17,719		259,229
Burke & Herbert Bank & Trust Co.		98		215,600
Coastal Financial Corp. (a)		4,775		241,710
Columbia Banking System, Inc.		22,515		736,691
CrossFirst Bankshares, Inc. (a)		32,234		503,173
Dime Community Bancshares, Inc.		12,840		451,454
Dogwood State Bank (Non-Voting) (Acquired 5/06/19, Cost $53,690) (a) (d) (e) (f)		5,369		70,495
Dogwood State Bank. (Voting) (Acquired 5/06/19, Cost $26,370) (a) (d) (e) (f)		2,637		34,624
East West Bancorp, Inc.		19,724		1,551,884
Eastern Bankshares, Inc.		20,684		417,196
Equity Bancshares, Inc. Class A		9,959		337,909
Farmers & Merchants Bank of Long Beach/Long Beach CA (b)		31		248,930
FB Financial Corp.		31,967		1,400,794
Fifth Third Bancorp		124,950		5,441,572
The First Bancshares, Inc.		19,900		768,538
Five Star Bancorp		6,258		187,740
Glacier Bancorp, Inc.		13,055		740,218
HarborOne Bancorp, Inc.		44,393		658,792
Heritage Commerce Corp.		36,181		432,001
Heritage Financial Corp.		10,209		249,508
Home BancShares, Inc.		75,983		1,850,186
Independent Bank Corp.		12,631		1,029,805
Independent Bank Group, Inc.		11,044		796,825
John Marshall Bancorp, Inc. (a)		12,810		254,919
Kearny Financial Corp.		31,239		413,917
Live Oak Bancshares, Inc.		38,791		3,386,066
Metropolitan Bank Holding Corp. (a)		2,256		240,332
National Bank Holdings Corp. Class A		20,382		895,585
Northern Trust Corp.		29,532		3,532,323
Origin Bancorp, Inc.		21,728		932,566
P10, Inc. (a)		19,765		276,315
PCSB Financial Corp.		13,101		249,443
Pinnacle Financial Partners, Inc.		29,874		2,852,967
Ponce de Leon Federal Bank (a)		12,479		182,693
Popular, Inc.		40,570		3,328,363
Preferred Bank		9,769		701,317
Provident Bancorp, Inc.		14,894		277,028
Sandy Spring Bancorp, Inc.		19,550		939,964
Seacoast Banking Corp. of Florida		20,201		714,913
Signature Bank		5,370		1,737,034
Southern First Bancshares, Inc. (a)		4,113		257,021
SouthState Corp.		20,360		1,631,040
State Street Corp.		62,223		5,786,739
SVB Financial Group (a)		992		672,814
Texas Capital Bancshares, Inc. (a)		10,419		627,745
Towne Bank		29,764		940,245
Walker & Dunlop, Inc.		4,628		698,273

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

	Number of Shares		Value
Webster Financial Corp.		39,649	$	2,214,000
Westamerica Bancorp.		36,016		2,079,204
Western Alliance Bancorp		37,698		4,058,190
				61,275,528
Diversified Financial Services — 2.1%
Air Lease Corp.		17,875		790,611
Apiture, Inc. (Acquired 7/01/20, Cost $87,167) (a) (d) (e) (f)		5,500		118,855
Assetmark Financial Holdings, Inc. (a)		13,205		346,103
Cboe Global Markets, Inc.		22,314		2,909,746
Columbia Financial, Inc. (a)		10,725		223,724
Encore Capital Group, Inc. (a) (b)		7,127		442,658
Flywire Corp. (a)		7,653		291,273
Grasshopper Bancorp, Inc. (Acquired 5/02/19, Cost $83,390) (a) (d) (e) (f)		8,339		30,688
Hannon Armstrong Sustainable Infrastructure Capital, Inc.		24,235		1,287,363
Houlihan Lokey, Inc.		10,552		1,092,343
I3 Verticals, Inc. Class A (a)		13,235		301,626
Lazard Ltd. Class A		32,551		1,420,200
NerdWallet, Inc. (a)		4,917		76,459
Nerdwallet, Inc., Class A Lockup Shares (Acquired 3/18/20, Cost $120,540) (a) (d) (e)		8,610		127,191
On Holding AG, Lockup Shares (Acquired 2/25/20- 9/16/21, Cost $98,306) (a) (d) (e)		13,500		484,913
OTC Markets Group, Inc. Class A		5,600		331,016
PennyMac Financial Services, Inc.		26,186		1,827,259
PRA Group, Inc. (a)		16,820		844,532
Raymond James Financial, Inc.		7,050		707,820
SoFi Technologies, Inc. (a)		45,793		723,987
Stash Financial, Inc. (Acquired 1/06/21-1/26/21, Cost $15,690) (a) (d) (e) (f)		487		38,142
StepStone Group, Inc. Class A		32,933		1,369,025
Tradeweb Markets, Inc. Class A		26,000		2,603,640
Virtus Investment Partners, Inc.		3,338		991,720
				19,380,894
Insurance — 3.7%
Assurant, Inc.		18,369		2,862,992
Axis Capital Holdings Ltd.		38,227		2,082,225
Brighthouse Financial, Inc. (a)		44,796		2,320,433
Brown & Brown, Inc.		53,002		3,724,981
BRP Group, Inc. Class A (a)		37,000		1,336,070
CNA Financial Corp.		59,223		2,610,550
Essent Group Ltd.		14,129		643,293
Hagerty Group, LLC. (Acquired 8/18/21, Cost $164,468) (a) (d) (e)		16,892		227,552
The Hanover Insurance Group, Inc.		5,561		728,825
Jackson Financial, Inc., Class A (b)		31,269		1,307,982
James River Group Holdings Ltd.		17,051		491,239
Kemper Corp.		45,649		2,683,705
Loews Corp.		88,321		5,101,421
Marsh & McLennan Cos., Inc.		9,769		1,698,048
Palomar Holdings, Inc. (a)		6,378		413,103
ProAssurance Corp.		22,201		561,685
Radian Group, Inc.		43,142		911,590
RenaissanceRe Holdings Ltd.		16,223		2,747,041
Ryan Specialty Group Holdings, Inc. Class A (a)		11,449		461,967
Selective Insurance Group, Inc.		18,209		1,492,045
				34,406,747

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

	Number of Shares		Value
Investment Companies — 0.3%
Groupe Bruxelles Lambert SA		22,942	$	2,563,868
Private Equity — 0.3%
KKR & Co., Inc.		41,100		3,061,950
Real Estate — 0.8%
eXp World Holdings, Inc.		4,800		161,712
FirstService Corp.		23,188		4,555,746
IQHQ, Inc. (Acquired 10/30/19-8/21/20, Cost $204,242) (a) (e) (f)		13,062		238,512
McGrath RentCorp		7,713		619,045
The St. Joe Co.		30,460		1,585,443
Tricon Residential, Inc.		26,359		402,766
				7,563,224
Real Estate Investment Trusts (REITS) — 4.3%
American Campus Communities, Inc.		26,616		1,524,831
Apartment Income REIT Corp.		14,418		788,232
Apartment Investment and Management Co. Class A (a)		201,737		1,557,409
Blackstone Mortgage Trust, Inc. Class A		5,369		164,399
Cedar Realty Trust, Inc.		17,954		450,825
Community Healthcare Trust, Inc.		6,622		313,022
CubeSmart		28,420		1,617,382
EastGroup Properties, Inc.		14,319		3,262,584
Equity Commonwealth (a)		114,199		2,957,754
Equity Residential		21,154		1,914,437
Essential Properties Realty Trust, Inc.		21,258		612,868
First Industrial Realty Trust, Inc.		7,506		496,897
Flagship Communities		5,389		104,008
Franklin BSP Realty Trust, Inc.		9,951		148,668
Healthcare Realty Trust, Inc.		24,792		784,419
JBG SMITH Properties		49,452		1,419,767
NexPoint Residential Trust, Inc.		1,990		166,822
Pebblebrook Hotel Trust		28,402		635,353
PennyMac Mortgage Investment Trust		30,500		528,565
PotlatchDeltic Corp.		13,931		838,925
PS Business Parks, Inc.		12,369		2,277,999
Rayonier, Inc.		93,326		3,766,637
Regency Centers Corp.		36,003		2,712,826
Rexford Industrial Realty, Inc.		14,381		1,166,443
Safehold, Inc.		8,822		704,437
Saul Centers, Inc.		15,798		837,610
Sunstone Hotel Investors, Inc. (a)		63,090		740,046
Terreno Realty Corp.		21,245		1,811,986
UMH Properties, Inc.		4,714		128,833
Washington Real Estate Investment Trust		33,564		867,629
Weyerhaeuser Co.		116,528		4,798,623
				40,100,236
Savings & Loans — 0.5%
Capitol Federal Financial, Inc.		115,379		1,307,244
FS Bancorp, Inc.		7,052		237,159
Pacific Premier Bancorp, Inc.		31,539		1,262,506
Sterling Bancorp		41,265		1,064,225

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

	Number of Shares		Value
WSFS Financial Corp.		23,785	$	1,192,104
				5,063,238
				173,415,685
Industrial — 13.2%
Aerospace & Defense — 0.8%
BWX Technologies, Inc.		25,400		1,216,152
Kratos Defense & Security Solutions, Inc. (a)		19,131		371,141
Rolls-Royce Holdings PLC (a)		994,262		1,658,195
Teledyne Technologies, Inc. (a)		8,089		3,534,003
Triumph Group, Inc. (a)		59,692		1,106,093
				7,885,584
Building Materials — 1.6%
Armstrong World Industries, Inc.		11,403		1,324,116
Gibraltar Industries, Inc. (a)		12,037		802,627
JELD-WEN Holding, Inc. (a)		19,331		509,565
Lennox International, Inc.		2,248		729,161
Martin Marietta Materials, Inc.		3,231		1,423,320
PGT Innovations, Inc. (a)		8,460		190,266
SPX Corp. (a)		21,902		1,307,111
Summit Materials, Inc. Class A (a)		87,953		3,530,434
Trex Co., Inc. (a)		11,835		1,598,080
UFP Industries, Inc.		14,326		1,318,135
Vulcan Materials Co.		8,401		1,743,880
				14,476,695
Electrical Components & Equipment — 0.7%
Belden, Inc.		26,059		1,712,858
Insteel Industries, Inc.		11,042		439,582
Littelfuse, Inc.		9,009		2,834,952
Novanta, Inc. (a)		9,270		1,634,579
				6,621,971
Electronics — 1.8%
Agilent Technologies, Inc.		26,900		4,294,585
Amphenol Corp. Class A		16,800		1,469,328
Brady Corp. Class A		14,152		762,793
Cadre Holdings, Inc. (a)		5,290		134,472
Fortive Corp.		28,000		2,136,120
Keysight Technologies, Inc. (a)		16,400		3,386,764
National Instruments Corp.		94,990		4,148,213
Stoneridge, Inc. (a)		8,757		172,863
				16,505,138
Engineering & Construction — 0.0%
Aris Water Solution, Inc. Class A (a)		19,131		247,746
Environmental Controls — 0.7%
Heritage-Crystal Clean, Inc. (a)		11,004		352,348
Stericycle, Inc. (a)		21,860		1,303,731
Tetra Tech, Inc.		4,782		811,984

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

	Number of Shares		Value
Waste Connections, Inc.		31,557	$	4,300,272
				6,768,335
Hand & Machine Tools — 0.3%
MSA Safety, Inc.		6,712		1,013,244
Regal Rexnord Corp.		8,583		1,460,655
				2,473,899
Machinery – Diversified — 2.2%
AGCO Corp.		5,386		624,884
Alamo Group, Inc.		2,677		394,001
Cactus, Inc. Class A		25,215		961,448
Chart Industries, Inc. (a)		1,332		212,441
CIRCOR International, Inc. (a)		17,303		470,296
Cognex Corp.		7,200		559,872
Colfax Corp. (a)		54,099		2,486,931
CSW Industrials, Inc.		7,599		918,415
Graco, Inc.		11,267		908,345
Hydrofarm Holdings Group, Inc. (a)		1,646		46,565
IDEX Corp.		10,000		2,363,200
Ingersoll Rand, Inc.		105,443		6,523,758
Marel HF		27,870		187,119
Mueller Water Products, Inc. Class A		36,489		525,442
Ranpak Holdings Corp. (a)		6,772		254,492
Thermon Group Holdings, Inc. (a)		26,055		441,111
The Toro Co.		18,859		1,884,203
Zurn Water Solutions Corp.		21,706		790,098
				20,552,621
Metal Fabricate & Hardware — 0.7%
AZZ, Inc.		16,093		889,782
Helios Technologies, Inc.		18,270		1,921,456
RBC Bearings, Inc. (a)		5,438		1,098,313
Strattec Security Corp. (a)		4,332		160,371
The Timken Co.		6,392		442,902
Valmont Industries, Inc.		2,551		639,025
Xometry, Inc. Class A (a)		29,057		1,489,171
				6,641,020
Miscellaneous - Manufacturing — 1.8%
Enerpac Tool Group Corp.		47,466		962,610
ESCO Technologies, Inc.		16,158		1,454,058
Federal Signal Corp.		12,143		526,278
Haynes International, Inc.		9,808		395,557
Hillenbrand, Inc.		7,512		390,549
John Bean Technologies Corp.		9,385		1,441,161
Myers Industries, Inc.		24,077		481,781
Textron, Inc.		147,291		11,370,865
				17,022,859
Packaging & Containers — 0.9%
Ardagh Metal Packaging SA (a)		28,939		261,319
Ball Corp.		55,800		5,371,866
Packaging Corp. of America		2,400		326,760

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

	Number of Shares		Value
Sealed Air Corp.		32,300	$	2,179,281
				8,139,226
Transportation — 1.7%
C.H. Robinson Worldwide, Inc.		13,394		1,441,596
International Seaways, Inc.		16,109		236,480
J.B. Hunt Transport Services, Inc.		26,052		5,325,029
Knight-Swift Transportation Holdings, Inc.		10,540		642,308
Landstar System, Inc.		8,016		1,435,024
Matson, Inc.		14,163		1,275,095
Old Dominion Freight Line, Inc.		13,661		4,895,829
Saia, Inc. (a)		2,591		873,245
US Xpress Enterprises, Inc. Class A (a)		14,799		86,870
				16,211,476
				123,546,570
Technology — 12.5%
Computers — 0.9%
Coalition, Inc. (Acquired 9/13/21, Cost $4,230) (a) (d) (e) (f)		256		4,230
Crowdstrike Holdings, Inc. Class A (a)		5,300		1,085,175
Endava PLC Sponsored ADR (a)		12,319		2,068,606
ForgeRock, Inc. (a)		3,004		80,177
Fortinet, Inc. (a)		7,700		2,767,380
Integral Ad Science Holding Corp. (a)		8,664		192,427
Leidos Holdings, Inc.		6,800		604,520
PAR Technology Corp. (a)		18,688		986,166
Parsons Corp. (a)		17,519		589,514
Thoughtworks Holding, Inc. (a)		6,586		176,571
				8,554,766
Semiconductors — 3.4%
Applied Materials, Inc.		14,473		2,277,471
CTS Corp.		17,950		659,124
Entegris, Inc.		49,161		6,812,731
KLA Corp.		7,800		3,354,858
Lattice Semiconductor Corp. (a)		40,594		3,128,174
Marvell Technology, Inc.		63,300		5,538,117
MaxLinear, Inc. (a)		13,644		1,028,621
Microchip Technology, Inc.		69,000		6,007,140
Onto Innovation, Inc. (a)		4,758		481,652
Semtech Corp. (a)		7,994		710,907
Skyworks Solutions, Inc.		10,300		1,597,942
				31,596,737
Software — 8.2%
Alignment Healthcare, Inc. (a)		41,024		576,797
Atlassian Corp. PLC Class A (a)		14,796		5,641,567
Bill.com Holdings, Inc. (a)		8,824		2,198,500
Black Knight, Inc. (a)		22,300		1,848,447
Braze, Inc. (a)		1,157		89,274
Broadridge Financial Solutions, Inc.		3,600		658,152
CCC Intelligent Solutions Holdings, Inc. (a)		33,582		382,499
Ceridian HCM Holding, Inc. (a)		62,907		6,571,265
Checkr, Inc. (Acquired 6/29/18-12/02/19, Cost $116,452) (a) (d) (e) (f)		5,148		277,992

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

	Number of Shares		Value
Citrix Systems, Inc.		12,700	$	1,201,293
Clarivate PLC (a)		147,089		3,459,533
Clear Secure Inc. Class A (a)		30,312		950,887
Clearwater Analytics Holdings, Inc. Class A (a)		13,520		310,690
Coupa Software, Inc. (a)		16,032		2,533,858
Databricks, Inc. (Acquired 7/24/20, Cost $16,140) (a) (d) (e) (f)		515		104,246
Datadog, Inc. Class A (a)		18,187		3,239,287
Definitive Healthcare Corp. (a)		3,177		86,827
The Descartes Systems Group, Inc. (a)		34,247		2,831,542
DocuSign, Inc. (a)		18,278		2,783,922
DoubleVerify Holdings, Inc. (a)		18,036		600,238
Doximity, Inc. Class A (a)		26,407		1,323,783
Duck Creek Technologies, Inc. (a)		15,754		474,353
Duolingo, Inc. (a)		476		50,508
Five9, Inc. (a)		4,357		598,303
Ginkgo Bioworks, Inc., Earnout Shares 15.00 (Acquired 9/17/21, Cost $0) (a) (d) (e) (f)		874		4,828
Ginkgo Bioworks, Inc., Earnout Shares 17.50 (Acquired 9/17/21, Cost $0) (a) (d) (e) (f)		874		4,625
Ginkgo Bioworks, Inc., Earnout Shares 20.00 (Acquired 9/17/21, Cost $0) (a) (d) (e) (f)		874		4,442
Ginkgo Bioworks, Inc., Lockup Shares (Acquired 7/30/19- 9/9/19, Cost $88,178) (a) (d) (e)		29,154		230,156
Gusto, Inc. (Acquired 8/18/20-11/09/20, Cost $204,799) (a) (d) (e) (f)		15,332		440,831
HashiCorp, Inc. Class A (a)		1,428		130,005
HashiCorp, Inc., Lockup Shares (Acquired 3/13/20-6/25/20, Cost $106,316) (a) (d) (e)		3,854		333,325
HubSpot, Inc. (a)		7,068		4,658,872
Manhattan Associates, Inc. (a)		3,100		482,019
ManTech International Corp. Class A		1,292		94,226
Megaport Ltd. (a)		42,318		571,739
Monday.com Ltd. (a)		4,611		1,423,508
MSCI, Inc.		3,503		2,146,253
nCino, Inc. (a)		34,031		1,866,941
Outset Medical, Inc. (a)		3,465		159,702
Paycom Software, Inc. (a)		1,390		577,114
Paycor HCM, Inc. (a)		14,666		422,527
Phreesia, Inc. (a)		22,242		926,602
Playtika Holding Corp. (a)		18,290		316,234
Privia Health Group, Inc. (a) (b)		7,115		184,065
Procore Technologies, Inc. (a) (b)		10,411		832,568
PTC, Inc. (a)		10,500		1,272,075
Roper Technologies, Inc.		10,935		5,378,489
SentinelOne Inc. Class A (a)		5,467		276,029
ServiceTitan, Inc. (Acquired 11/09/18, Cost $12,280) (a) (d) (e) (f)		637		75,778
Socure, Inc. (Acquired 12/22/21, Cost $62,185) (a) (d) (e) (f)		3,870		62,185
Sophia Genetics SA (a)		6,168		86,969
SS&C Technologies Holdings, Inc		16,763		1,374,231
Tanium, Inc., Class B (Acquired 9/24/20, Cost $30,277) (a) (d) (e) (f)		2,657		24,498
Themis Solutions, Inc. (Acquired 4/14/21, Cost $108,219) (a) (d) (e) (f)		4,820		116,210
Twilio, Inc. Class A (a)		8,652		2,278,418
Veeva Systems, Inc. Class A (a)		25,948		6,629,195
Workiva, Inc. (a)		7,196		939,006
Xero Ltd. (a)		22,382		2,292,528

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

	Number of Shares		Value
Zynga, Inc. Class A (a)		176,994	$	1,132,762
				76,542,718
				116,694,221
Utilities — 3.6%
Electric — 2.3%
Ameren Corp.		600		53,406
Ameresco, Inc. Class A (a)		2,781		226,485
CenterPoint Energy, Inc.		94,959		2,650,306
Eversource Energy		5,800		527,684
FirstEnergy Corp.		153,598		6,388,141
IDACORP, Inc.		17,192		1,948,025
MGE Energy, Inc.		13,505		1,110,786
NorthWestern Corp. (b)		20,404		1,166,293
PG&E Corp. (a)		417,093		5,063,509
PNM Resources, Inc.		4,712		214,914
Portland General Electric Co.		10,340		547,193
Vistra Corp.		79,504		1,810,306
				21,707,048
Gas — 1.0%
Atmos Energy Corp.		8,609		901,965
Chesapeake Utilities Corp.		15,190		2,214,854
National Fuel Gas Co.		38,007		2,430,167
ONE Gas, Inc.		22,544		1,749,189
RGC Resources, Inc.		5,618		129,270
Southwest Gas Holdings, Inc.		20,259		1,419,143
				8,844,588
Water — 0.3%
California Water Service Group		15,180		1,090,835
Middlesex Water Co.		7,713		927,874
SJW Group		11,574		847,217
				2,865,926
				33,417,562
TOTAL COMMON STOCK (Cost $643,198,160)				885,319,462
PREFERRED STOCK — 2.0%
Communications — 0.1%
Internet — 0.1%
1661, Inc., Series F (Acquired 5/28/21, Cost $288,836) (a) (d) (e) (f)		49,629		288,836
Evolve Vacation Rental Network, Inc., Series 8 (Acquired 3/29/18, Cost $44,816) (a) (d) (e) (f)		5,266		102,002
Evolve Vacation Rental Network, Inc., Series 9 (Acquired 5/29/20, Cost $20,111) (a) (d) (e) (f)		3,470		67,214
Minted, Inc., Series E (Acquired 10/30/18, Cost $113,257) (a) (d) (e) (f)		8,410		124,552

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

	Number of Shares		Value
SecurityScorecard, Inc., Series E (Acquired 3/05/21, Cost $262,495) (a) (d) (e) (f)		17,323	$	262,495
				845,099
				845,099
Consumer, Cyclical — 0.1%
Auto Manufacturers — 0.1%
Nuro, Inc., Series C, (Acquired 10/30/20-3/02/21, Cost $282,254)
(a) (d) (e) (f)		21,621		450,705
Nuro, Inc., Series D (Acquired 10/29/21, Cost $252,025)
(a) (d) (e) (f)		12,090		252,025
				702,730
Leisure Time — 0.0%
Rad Power Bikes, Inc., Series C, (Acquired 1/22/21, Cost $69,082)
(a) (d) (e) (f)		14,321		137,250
Rad Power Bikes, Inc., Series D, (Acquired 9/16/21, Cost $107,722)
(a) (d) (e) (f)		11,240		107,722
				244,972
Retail — 0.0%
OfferUp, Inc., Series F, (Acquired 7/01/20, Cost $9,217)
(a) (d) (e) (f)		4,025		5,836
Consumer, Non-cyclical — 0.8%
Agriculture — 0.1%
Bunge Ltd.
4.875% (a)		2,962		375,404
Farmer's Business Network, Inc., Series E, (Acquired 2/11/19, Cost $191,081)
(a) (d) (e) (f)		8,198		509,570
Farmer's Business Network, Inc., Series F, (Acquired 7/31/20, Cost $48,329)
(a) (d) (e) (f)		5,211		323,904
				1,208,878
				1,208,878
Biotechnology — 0.2%
Genesis Therapeutics, Inc., Series A, (Acquired 11/24/20, Cost $25,262)
(a) (d) (e) (f)		4,946		25,262
Inscripta, Inc., Series E, (Acquired 3/30/21, Cost $148,812)
(a) (d) (e) (f)		16,853		148,812
Insitro, Inc., Series B, (Acquired 5/21/20, Cost $34,456)
(a) (d) (e) (f)		5,530		101,150
Insitro, Inc., Series C, (Acquired 4/07/21, Cost $62,208)
(a) (d) (e) (f)		3,401		62,208
Kardium, Inc., Series D-5, (Acquired 11/29/18, Cost $29,906)
(a) (d) (e) (f)		30,866		31,355
Kardium, Inc., Series D-6, (Acquired 1/08/21, Cost $145,349)
(a) (d) (e) (f)		143,083		145,349
Laronde, Inc., Series B, (Acquired 7/28/21, Cost $109,340)
(a) (d) (e) (f)		3,905		109,340
National Resilience, Inc., Series B, (Acquired 10/23/20, Cost $263,720)
(a) (d) (e) (f)		19,306		857,379

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

	Number of Shares		Value
National Resilience, Inc., Series C, (Acquired 6/09/21, Cost $315,045)
(a) (d) (e) (f)		7,094	$	315,045
Treeline Biosciences, Inc., Series A, (Acquired 4/09/21, Cost $40,640)
(a) (d) (e) (f)		5,192		40,640
				1,836,540
				1,836,540
Commercial Services — 0.1%
Honor Technology, Inc., Series D, (Acquired 10/16/20, Cost $225,290)
(a) (d) (e) (f)		93,556		295,768
Honor Technology, Inc., Series E, (Acquired 9/29/21, Cost $116,646)
(a) (d) (e) (f)		36,897		116,646
Redwood Materials, Inc., Series C, (Acquired 5/28/21, Cost $214,074)
(a) (d) (e) (f)		4,516		214,074
				626,488
				626,488
Food — 0.2%
Cava Group, Inc., Series E, (Acquired 6/23/20-3/26/21, Cost $475,884)
(a) (d) (e) (f)		18,159		1,061,575
Cava Group, Inc., Series F, (Acquired 3/26/21, Cost $512,596)
(a) (d) (e) (f)		13,622		796,342
				1,857,917
				1,857,917
Health Care – Products — 0.1%
Prime Medicine, Inc., Series B, (Acquired 4/19/21, Cost $40,943)
(a) (d) (e) (f)		9,347		40,943
Ring Therapeutics, Inc., Series B, (Acquired 4/12/21, Cost $50,885)
(a) (d) (e) (f)		5,531		50,885
Tempus Labs, Inc., Series D, (Acquired 3/16/18, Cost $21,326)
(a) (d) (e) (f)		2,275		128,333
Tempus Labs, Inc., Series E, (Acquired 8/23/18, Cost $29,149)
(a) (d) (e) (f)		1,741		100,699
Tempus Labs, Inc., Series F, (Acquired 4/30/19, Cost $17,059)
(a) (d) (e) (f)		689		40,362
Tempus Labs, Inc., Series G, (Acquired 2/06/20, Cost $19,176)
(a) (d) (e) (f)		500		29,630
Tempus Labs, Inc., Series G-2, (Acquired 11/19/20, Cost $26,075)
(a) (d) (e) (f)		455		26,931
				417,783
				417,783
Health Care – Services — 0.1%
Caris Life Sciences, Inc., Series C, (Acquired 8/14/20, Cost $71,520)
(a) (d) (e) (f)		45,403		367,764
Caris Life Sciences, Inc., Series D, (Acquired 5/11/21, Cost $378,132)
(a) (d) (e) (f)		46,683		378,133

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

	Number of Shares		Value
Gyroscope Therapeutics, Inc., Series C-1, (Acquired 3/30/21, Cost $45,899)
(a) (d) (e) (f)		19,956	$	88,265
				834,162
				834,162
Pharmaceuticals — 0.0%
Capsule Corporation, Series D, (Acquired 4/07/21, Cost $144,670)
(a) (d) (e) (f)		9,983		144,670
Haul Hub, Inc., Series B, (Acquired 2/14/20-3/03/21, Cost $108,854)
(a) (d) (e) (f)		7,466		108,854
				253,524
				253,524
				7,035,292
Financial — 0.3%
Diversified Financial Services — 0.3%
Color Health, Inc., Series D, (Acquired 12/17/20, Cost $43,490)
(a) (d) (e) (f)		1,155		115,464
Color Health, Inc., Series D-1, (Acquired 1/13/20, Cost $56,632)
(a) (d) (e) (f)		2,655		265,418
Color Health, Inc., Series E, (Acquired 10/26/21, Cost $15,095)
(a) (d) (e) (f)		151		15,096
Convoy, Inc., Series C, (Acquired 9/14/18, Cost $127,740)
(a) (d) (e) (f)		17,990		296,797
Convoy, Inc., Series D, (Acquired 10/30/19, Cost $417,858)
(a) (d) (e) (f)		30,861		509,142
Convoy, Inc., Series E, (Acquired 9/30/21, Cost $72,706)
(a) (d) (e) (f)		4,407		72,706
Stash Financial, Inc., Series F, (Acquired 4/24/20, Cost $126,801)
(a) (d) (e) (f)		5,060		396,299
Stash Financial, Inc., Series G, (Acquired 1/26/21, Cost $174,908)
(a) (d) (e) (f)		4,667		365,519
				2,036,441
Insurance — 0.0%
Go Maps, Inc., Series B-1, (Acquired 5/15/19, Cost $1,626)
(a) (d) (e) (f)		755		7,565
Investment Companies — 0.0%
Maplebear, Inc., Series E, (Acquired 11/19/21-12/01/21, Cost $348,680)
(a) (d) (e) (f)		2,900		344,375
Maplebear, Inc., Series I, (Acquired 2/26/21, Cost $58,500)
(a) (d) (e) (f)		468		55,575
				399,950
				2,443,956
Industrial — 0.2%
Aerospace & Defense — 0.0%
ABL Space Systems Company, Series B (Acquired 3/24/21, Cost $328,985) (a) (d) (e) (f)		7,305		496,712

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

	Number of Shares		Value
Electrical Components & Equipment — 0.1%
Sila Nanotechnologies, Inc., Series F (Acquired 1/07/21, Cost $505,509) (a) (d) (e) (f)		12,248	$	505,509
Electronics — 0.1%
Sartorius AG 0.130%		1,480		1,001,728
				2,003,949
Technology — 0.5%
Computers — 0.0%
Coalition, Inc., Series E (Acquired 9/07/21, Cost $253,711) (a) (d) (e) (f)		15,355		253,711
Mesosphere, Inc., Series D (Acquired 5/04/18, Cost $72,584) (a) (d) (e) (f)		6,566		9,849
				263,560
Software — 0.5%
Checkr, Inc., Series C (Acquired 4/10/18, Cost $106,628) (a) (d) (e) (f)		7,811		421,794
Checkr, Inc., Series D (Acquired 9/06/19, Cost $308,786) (a) (d) (e) (f)		10,209		551,286
Databricks, Inc., Series F (Acquired 10/22/19, Cost $104,923) (a) (d) (e) (f)		2,443		494,512
Databricks, Inc., Series G (Acquired 2/01/21, Cost $128,414) (a) (d) (e) (f)		724		146,552
Databricks, Inc., Series H (Acquired 8/31/21, Cost $121,028) (a) (d) (e) (f)		549		111,129
Eikon Therapeutics, Inc., Series B (Acquired 3/12/21, Cost $89,186) (a) (d) (e) (f)		5,042		89,186
Flexe, Inc., Series C (Acquired 11/18/20, Cost $134,849) (a) (d) (e) (f)		11,083		146,628
Gusto, Inc., Series B (Acquired 8/18/20, Cost $20,633) (a) (d) (e) (f)		3,644		110,760
Gusto, Inc., Series B-2 (Acquired 8/18/20, Cost $11,553) (a) (d) (e) (f)		6,804		206,810
Gusto, Inc., Series C (Acquired 7/16/18, Cost $84,209) (a) (d) (e) (f)		11,076		336,659
Gusto, Inc., Series D (Acquired 7/16/19, Cost $187,638) (a) (d) (e) (f)		14,095		428,422
JetClosing, Inc., Series A (Acquired 5/25/18, Cost $22,781) (a) (d) (e) (f)		11,678		7,707
JetClosing, Inc., Series B-1 (Acquired 7/13/20-2/25/21, Cost $36,276) (a) (d) (e) (f)		27,130		16,007
JetClosing, Inc., Series B-2 (Acquired 2/06/20, Cost $5,769) (a) (d) (e) (f)		5,185		3,059
Seismic Software, Inc., Series E (Acquired 12/13/18, Cost $117,981) (a) (d) (e) (f)		18,715		269,982
Seismic Software, Inc., Series F (Acquired 9/25/20-3/24/21, Cost $18,592) (a) (d) (e) (f)		2,115		30,511
ServiceTitan, Inc., Series A-1 (Acquired 11/09/18, Cost $263) (a) (d) (e) (f)		10		1,190
ServiceTitan, Inc., Series D (Acquired 11/09/18, Cost $124,743) (a) (d) (e) (f)		4,744		564,351
ServiceTitan, Inc., Series E (Acquired 4/23/20, Cost $7,435) (a) (d) (e) (f)		220		26,171
ServiceTitan, Inc., Series F (Acquired 3/25/21, Cost $25,650) (a) (d) (e) (f)		239		28,432
Socure, Inc., Series A (Acquired 12/22/21, Cost $103,787) (a) (d) (e) (f)		6,459		103,787
Socure, Inc., Series A-1 (Acquired 12/22/21, Cost $34,290) (a) (d) (e) (f)		2,134		34,290
Socure, Inc., Series B (Acquired 12/22/21, Cost $611) (a) (d) (e) (f)		38		611
Socure, Inc., Series E (Acquired 10/27/21, Cost $143,750) (a) (d) (e) (f)		8,946		143,750
Themis Solutions, Inc., Series AA (Acquired 4/14/21, Cost $24,473) (a) (d) (e) (f)		1,090		26,280
Themis Solutions, Inc., Series AB (Acquired 4/14/21, Cost $2,694) (a) (d) (e) (f)		120		2,893
Themis Solutions, Inc., Series B (Acquired 4/14/21, Cost $2,694) (a) (d) (e) (f)		120		2,893

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

	Number of Shares		Value
Themis Solutions, Inc., Series E (Acquired 4/14/21, Cost $309,164) (a) (d) (e) (f)		13,770	$	331,995
				4,637,647
				4,901,207
TOTAL PREFERRED STOCK (Cost $11,086,841)				18,183,041
TOTAL EQUITIES (Cost $654,285,001)				903,502,503
	Principal Amount
BONDS & NOTES — 0.0%
CORPORATE DEBT — 0.0%
Oil & Gas Services — 0.0%
Weatherford International Ltd.
11.000% 12/01/24 (c)	$	73,000		75,190
TOTAL CORPORATE DEBT (Cost $52,943)				75,190
TOTAL BONDS & NOTES (Cost $52,943)				75,190
	Number of Shares
RIGHTS — 0.0%
Consumer, Non-cyclical — 0.0%
Pharmaceuticals — 0.0%
Progenic Pharmaceuticals, Inc., CVR (a) (d) (f)		25,104		1,218
TOTAL RIGHTS (Cost $0)				1,218
WARRANTS — 0.0%
Communications — 0.0%
Internet — 0.0%
Grab Holdings Ltd.		2,565		5,412
Consumer, Non-cyclical — 0.0%
Biotechnology — 0.0%
Sema4 Holdings Corp. (a)		3,133		3,070
				3,070
Commercial Services — 0.0%
Advantage Solutions, Inc., Expires 10/28/25 (a)		7,777		19,209
Health Care – Products — 0.0%
SomaLogic, Inc. (a)		660		2,218
Pharmaceuticals — 0.0%
EQRx, Inc. (a)		1,166		1,213

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

	Number of Shares		Value
			$	25,710
Financial — 0.0%
Banks — 0.0%
Dogwood State Bank (Acquired 5/06/19, Cost $0) (a) (d) (e) (f)		800		3,856
Diversified Financial Services — 0.0%
Grasshopper Bancorp, Inc. (Acquired 10/15/18, Cost $0) (a) (d) (e) (f)		1,432		—
Insurance — 0.0%
Hagerty Group, LLC. (Acquired 8/18/21, Cost $4,451) (a) (d) (e)		3,040		12,678
				16,534
TOTAL WARRANTS (Cost $38,876)				47,656
MUTUAL FUNDS — 0.6%
Diversified Financial Services — 0.6%
State Street Navigator Securities Lending Government Money Market Portfolio
(g)		4,956,949		4,956,949
TOTAL MUTUAL FUNDS (Cost $4,956,949)				4,956,949
TOTAL LONG-TERM INVESTMENTS (Cost $659,333,769)				908,583,516
SHORT-TERM INVESTMENTS — 3.7%
Mutual Fund — 3.5%
T. Rowe Price Government Reserve Investment Fund		33,013,446		33,013,446
	Principal Amount
Repurchase Agreement — 0.2%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (h)	$	2,101,031		2,101,031
TOTAL SHORT-TERM INVESTMENTS (Cost $35,114,477)				35,114,477
TOTAL INVESTMENTS — 100.9% (Cost $694,448,246) (i)				943,697,993
Other Assets/(Liabilities) — (0.9)%				(8,122,542)
NET ASSETS — 100.0%			$	935,575,451

Abbreviation Legend

ADR American Depositary Receipt

GDR Global Depositary Receipt

PIPE Private Investment in Public Equity

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 December 31, 2021, was $13,365,848 or 1.43% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $8,881,099 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).

(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 December 31, 2021, the aggregate market value of these securities amounted to $297,577 or 0.03% of net assets.

(d) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At December 31, 2021, these securities amounted to a value of $32,018,890 or 3.42% of net assets.

(e) Restricted security. Certain securities are restricted as to resale. At December 31, 2021, these securities amounted to a value of $32,256,184 or 3.45% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

(f) Investment was valued using significant unobservable inputs.

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

(h) Maturity value of $2,101,031. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $2,143,145.

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

MassMutual Select T. Rowe Price U.S. Treasury Long-Term Index Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 99.1%
U.S. Government Agency Obligations and Instrumentalities (a) — 3.8%
Collateralized Mortgage Obligations — 1.0%
Government National Mortgage Association
Series 2016-121, Class JF, 1 mo. USD LIBOR + 0.400% 0.504% FRN 9/20/46	$	223,830	$	225,871
Series 2019-78, Class FB, 1 mo. USD LIBOR + 0.400% 0.504% FRN 6/20/49		125,495		126,473
Series 2019-112, Class GF, 1 mo. USD LIBOR + 0.430% 0.534% FRN 9/20/49		118,856		119,726
Series 2019-103, Class CF, 1 mo. USD LIBOR + 0.450% 0.554% FRN 8/20/49		226,256		228,647
Series 2019-111, Class FB, 1 mo. USD LIBOR + 0.450% 0.554% FRN 9/20/49		89,480		90,550
Series 2019-125, Class DF, 1 mo. USD LIBOR + 0.450% 0.554% FRN 10/20/49		183,613		185,666
Series 2020-7, Class KE, 2.500% 1/20/50		224,925		230,515
				1,207,448
Pass-Through Securities — 2.8%
Government National Mortgage Association II
Pool #MA7767 2.500% 12/20/51 (b)		675,000		692,948
Pool #MA4484 3.000% 6/20/32		177,025		185,528
Pool #MA6255 3.000% 12/20/34		167,467		175,668
Pool #MA6381 3.000% 1/20/35		91,800		96,295
Pool #MA6630 3.000% 5/20/35		41,361		43,387
Pool #MA6209 3.000% 10/20/49		23,646		24,217
Pool #MA6399 3.000% 1/20/50		58,392		59,803
Pool #MA6464 3.000% 2/20/50		141,151		144,562
Pool #MA6531 3.000% 3/20/50		79,269		81,185
Pool #MA7650 3.000% 10/20/51		227,232		235,901
Pool #BQ0937 3.500% 9/20/49		86,402		91,806
Pool #BQ7205 3.500% 10/20/49		50,319		54,229
Pool #BS3713 3.500% 1/20/50		161,426		171,548
Pool #BS3771 3.500% 2/20/50		123,928		131,350
Pool #MA4588 4.500% 7/20/47		150,871		162,353
Pool #MA4781 5.000% 10/20/47		69,599		76,037
Pool #MA4840 5.000% 11/20/47		52,288		57,124
Pool #MA5653 5.000% 12/20/48		180,530		193,012
Pool #MA5820 5.500% 3/20/49		24,059		25,892
Government National Mortgage Association II TBA
2.500% 1/21/52 (b)		685,000		702,339

MassMutual Select T. Rowe Price U.S. Treasury Long-Term Index Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3.000% 7/20/49 (b)	$	225,000	$	232,928
				3,638,112
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $4,701,833)				4,845,560
U.S. TREASURY OBLIGATIONS — 95.3%
U.S. Treasury Bonds & Notes — 95.3%
U.S. Treasury Bond
1.125% 5/15/40		4,445,000		3,891,351
1.125% 8/15/40		6,270,000		5,465,649
1.250% 5/15/50		3,770,000		3,194,882
1.375% 11/15/40		2,610,000		2,374,056
1.375% 8/15/50		7,400,000		6,470,151
1.500% 2/15/30 (c)		895,000		899,825
1.625% 11/15/50		3,580,000		3,327,851
1.750% 8/15/41		1,840,000		1,780,238
1.875% 2/15/41		7,480,000		7,391,954
1.875% 2/15/51		6,875,000		6,787,990
1.875% 11/15/51		7,120,000		7,068,825
2.000% 11/15/41		8,995,000		9,096,194
2.000% 2/15/50		4,050,000		4,107,728
2.000% 8/15/51		630,000		640,766
2.250% 5/15/41		7,690,000		8,063,053
2.250% 8/15/46		2,505,000		2,645,294
2.250% 8/15/49		2,550,000		2,724,590
2.375% 11/15/49		2,220,000		2,435,145
2.375% 5/15/51		2,440,000		2,690,017
2.500% 2/15/46		1,700,000		1,875,732
2.500% 5/15/46		3,925,000		4,333,987
2.875% 11/15/46		1,700,000		2,009,384
2.875% 5/15/49		2,480,000		2,982,852
3.000% 11/15/45		850,000		1,020,726
3.000% 2/15/47		1,560,000		1,886,117
3.000% 5/15/47		1,200,000		1,454,122
3.000% 8/15/48		2,330,000		2,848,092
3.000% 2/15/49		2,480,000		3,044,085
3.125% 5/15/48 (d)		4,125,000		5,147,564
3.375% 11/15/48		2,330,000		3,044,089
U.S. Treasury Note
1.375% 11/15/31		12,180,000		12,027,750
				122,730,059
TOTAL U.S. TREASURY OBLIGATIONS (Cost $123,851,121)				122,730,059
TOTAL BONDS & NOTES (Cost $128,552,954)				127,575,619
TOTAL LONG-TERM INVESTMENTS (Cost $128,552,954)				127,575,619

MassMutual Select T. Rowe Price U.S. Treasury Long-Term Index Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
SHORT-TERM INVESTMENTS — 1.3%
Mutual Fund — 0.5%
T. Rowe Price Government Reserve Investment Fund		696,522	$	696,522
	Principal Amount
Repurchase Agreement — 0.8%
Fixed Income Clearing Corp., Repurchase Agreement, dated 12/31/21, 0.000%, due 1/03/22 (e)	$	1,000,000		1,000,000
TOTAL SHORT-TERM INVESTMENTS (Cost $1,696,522)				1,696,522
TOTAL INVESTMENTS — 100.4% (Cost $130,249,476) (f)				129,272,141
Other Assets/(Liabilities) — (0.4)%				(532,376)
NET ASSETS — 100.0%			$	128,739,765

Abbreviation Legend

FRN Floating Rate Note

TBA To Be Announced

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) 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.

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

(c) Denotes all or a portion of security on loan. The total value of securities on loan as of December 31, 2021, was $904,934 or 0.70% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $923,343 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).

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

(e) Maturity value of $1,000,000. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 7/31/28, and an aggregate market value, including accrued interest, of $1,020,080.

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

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	1/21/22		131.50		17	USD	2,217,969	$	(3,187)	$	(6,348)	$	3,161
Put
U.S. Treasury Note 10 Year Future	1/21/22		130.00		17	USD	2,217,969	$	(6,641)	$	(8,204)	$	1,563
U.S. Treasury Note 10 Year Future	2/18/22		129.50		20	USD	2,609,375		(10,938)		(11,528)		590
								$	(17,579)	$	(19,732)	$	2,153
								$	(20,766)	$	(26,080)	$	5,314

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Long Bond	3/22/22		249	$	40,006,071	$	(57,133)
U.S. Treasury Ultra Bond	3/22/22		7		1,372,389		7,486
						$	(49,647)
Short
U.S. Treasury Note 10 Year	3/22/22		13	$	(1,696,918)	$	824
U.S. Treasury Ultra 10 Year	3/22/22		182		(26,270,304)		(381,321)
U.S. Treasury Note 2 Year	3/31/22		135		(29,474,598)		21,395
U.S. Treasury Note 5 Year	3/31/22		84		(10,154,763)		(7,268)
						$	(366,370)

Currency Legend

USD U.S. Dollar

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 38.9%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		1,982,286	$	22,399,831
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		1,729,677		27,000,252
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		181,954		2,367,219
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		831,929		12,146,169
MM S&P 500 Index Fund, Class I (a)		676,590		14,167,796
				78,081,267
Fixed Income Funds — 61.1%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		4,394,560		44,428,999
MassMutual Select T. Rowe Price Emerging Markets Bond Fund, Class I (a)		880,615		7,969,568
MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I (a)		3,877,414		40,518,974
MassMutual Select T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I (a)		495,427		3,809,836
State Street Institutional U.S. Government Money Market Fund		6,323,347		6,323,347
T. Rowe Price Dynamic Global Bond Fund, Class I		807,506		7,695,531
T. Rowe Price Institutional Floating Rate Fund		441,856		4,308,094
T. Rowe Price Institutional High Yield Fund		863,980		7,628,947
				122,683,296
TOTAL MUTUAL FUNDS (Cost $195,430,653)				200,764,563
TOTAL LONG-TERM INVESTMENTS (Cost $195,430,653)				200,764,563
TOTAL INVESTMENTS — 100.0% (Cost $195,430,653) (b)				200,764,563
Other Assets/(Liabilities) — (0.0)%				(41,154)
NET ASSETS — 100.0%			$	200,723,409

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 99.9%
Equity Funds — 41.7%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		310,685	$	3,510,740
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		272,627		4,255,711
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		27,247		354,478
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		133,051		1,942,540
MM S&P 500 Index Fund, Class I (a)		117,838		2,467,535
				12,531,004
Fixed Income Funds — 58.2%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		673,405		6,808,127
MassMutual Select T. Rowe Price Emerging Markets Bond Fund, Class I (a)		142,218		1,287,069
MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I (a)		492,650		5,148,189
MassMutual Select T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I (a)		77,084		592,776
State Street Institutional U.S. Government Money Market Fund		640,889		640,889
T. Rowe Price Dynamic Global Bond Fund, Class I		123,323		1,175,265
T. Rowe Price Institutional Floating Rate Fund		65,407		637,723
T. Rowe Price Institutional High Yield Fund		139,099		1,228,246
				17,518,284
TOTAL MUTUAL FUNDS (Cost $29,496,830)				30,049,288
TOTAL LONG-TERM INVESTMENTS (Cost $29,496,830)				30,049,288
TOTAL INVESTMENTS — 99.9% (Cost $29,496,830) (b)				30,049,288
Other Assets/(Liabilities) — 0.1%				26,770
NET ASSETS — 100.0%			$	30,076,058

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 45.7%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		1,696,751	$	19,173,286
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		1,506,344		23,514,036
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		149,636		1,946,763
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		740,557		10,812,129
MM S&P 500 Index Fund, Class I (a)		613,575		12,848,262
				68,294,476
Fixed Income Funds — 54.3%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		3,148,458		31,830,911
MassMutual Select T. Rowe Price Emerging Markets Bond Fund, Class I (a)		636,809		5,763,124
MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I (a)		2,152,181		22,490,294
MassMutual Select T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I (a)		389,800		2,997,560
State Street Institutional U.S. Government Money Market Fund		4,058,445		4,058,445
T. Rowe Price Dynamic Global Bond Fund, Class I		567,065		5,404,128
T. Rowe Price Institutional Floating Rate Fund		302,959		2,953,854
T. Rowe Price Institutional High Yield Fund		625,185		5,520,383
				81,018,699
TOTAL MUTUAL FUNDS (Cost $143,027,387)				149,313,175
TOTAL LONG-TERM INVESTMENTS (Cost $143,027,387)				149,313,175
TOTAL INVESTMENTS — 100.0% (Cost $143,027,387) (b)				149,313,175
Other Assets/(Liabilities) — (0.0)%				(33,737)
NET ASSETS — 100.0%			$	149,279,438

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 48.7%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		1,969,949	$	22,260,419
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		1,720,063		26,850,181
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		175,144		2,278,625
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		829,375		12,108,870
MM S&P 500 Index Fund, Class I (a)		687,245		14,390,903
				77,888,998
Fixed Income Funds — 51.3%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		3,229,032		32,645,510
MassMutual Select T. Rowe Price Emerging Markets Bond Fund, Class I (a)		625,276		5,658,744
MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I (a)		1,999,757		20,897,457
MassMutual Select T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I (a)		420,629		3,234,634
State Street Institutional U.S. Government Money Market Fund		5,271,652		5,271,652
T. Rowe Price Dynamic Global Bond Fund, Class I		596,838		5,687,870
T. Rowe Price Institutional Floating Rate Fund		321,226		3,131,953
T. Rowe Price Institutional High Yield Fund		611,418		5,398,824
				81,926,644
TOTAL MUTUAL FUNDS (Cost $150,954,638)				159,815,642
TOTAL LONG-TERM INVESTMENTS (Cost $150,954,638)				159,815,642
TOTAL INVESTMENTS — 100.0% (Cost $150,954,638) (b)				159,815,642
Other Assets/(Liabilities) — (0.0)%				(25,165)
NET ASSETS — 100.0%			$	159,790,477

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 52.8%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		10,508,708	$	118,748,395
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		9,280,294		144,865,385
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		977,299		12,714,663
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		4,090,189		59,716,753
MM S&P 500 Index Fund, Class I (a)		3,657,809		76,594,527
				412,639,723
Fixed Income Funds — 47.2%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		15,107,234		152,734,137
MassMutual Select T. Rowe Price Emerging Markets Bond Fund, Class I (a)		2,817,179		25,495,469
MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I (a)		8,155,815		85,228,263
MassMutual Select T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I (a)		2,103,321		16,174,541
State Street Institutional U.S. Government Money Market Fund		25,452,316		25,452,316
T. Rowe Price Dynamic Global Bond Fund, Class I		2,730,399		26,020,705
T. Rowe Price Institutional Floating Rate Fund		1,480,680		14,436,630
T. Rowe Price Institutional High Yield Fund		2,711,873		23,945,841
				369,487,902
TOTAL MUTUAL FUNDS (Cost $726,305,633)				782,127,625
TOTAL LONG-TERM INVESTMENTS (Cost $726,305,633)				782,127,625
TOTAL INVESTMENTS — 100.0% (Cost $726,305,633) (b)				782,127,625
Other Assets/(Liabilities) — (0.0)%				(363,858)
NET ASSETS — 100.0%			$	781,763,767

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 61.0%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		11,567,065	$	130,707,834
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		10,205,432		159,306,787
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		1,061,793		13,813,925
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		4,608,926		67,290,322
MM S&P 500 Index Fund, Class I (a)		3,873,996		81,121,469
				452,240,337
Fixed Income Funds — 39.0%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		12,498,533		126,360,166
MassMutual Select T. Rowe Price Emerging Markets Bond Fund, Class I (a)		2,110,931		19,103,925
MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I (a)		4,907,930		51,287,873
MassMutual Select T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I (a)		2,206,349		16,966,827
State Street Institutional U.S. Government Money Market Fund		24,447,463		24,447,463
T. Rowe Price Dynamic Global Bond Fund, Class I		2,255,776		21,497,546
T. Rowe Price Institutional Floating Rate Fund		1,200,233		11,702,273
T. Rowe Price Institutional High Yield Fund		2,061,520		18,203,219
				289,569,292
TOTAL MUTUAL FUNDS (Cost $683,783,804)				741,809,629
TOTAL LONG-TERM INVESTMENTS (Cost $683,783,804)				741,809,629
TOTAL INVESTMENTS — 100.0% (Cost $683,783,804) (b)				741,809,629
Other Assets/(Liabilities) — (0.0)%				(332,199)
NET ASSETS — 100.0%			$	741,477,430

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 72.6%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		31,199,851	$	352,558,312
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		29,158,244		455,160,186
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		2,771,798		36,061,095
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		12,366,915		180,556,956
MM S&P 500 Index Fund, Class I (a)		9,838,118		206,010,199
				1,230,346,748
Fixed Income Funds — 27.5%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		21,769,588		220,090,533
MassMutual Select T. Rowe Price Emerging Markets Bond Fund, Class I (a)		3,045,311		27,560,063
MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I (a)		3,724,840		38,924,579
MassMutual Select T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I (a)		5,371,696		41,308,343
State Street Institutional U.S. Government Money Market Fund		54,935,701		54,935,701
T. Rowe Price Dynamic Global Bond Fund, Class I		3,983,245		37,960,326
T. Rowe Price Institutional Floating Rate Fund		1,939,407		18,909,218
T. Rowe Price Institutional High Yield Fund		3,081,425		27,208,982
				466,897,745
TOTAL MUTUAL FUNDS (Cost $1,498,378,450)				1,697,244,493
TOTAL LONG-TERM INVESTMENTS (Cost $1,498,378,450)				1,697,244,493
TOTAL INVESTMENTS — 100.1% (Cost $1,498,378,450) (b)				1,697,244,493
Other Assets/(Liabilities) — (0.1)%				(920,893)
NET ASSETS — 100.0%			$	1,696,323,600

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 81.7%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		16,876,203	$	190,701,094
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		17,053,380		266,203,255
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		1,477,273		19,219,316
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		6,727,785		98,225,661
MM S&P 500 Index Fund, Class I (a)		4,206,966		88,093,867
				662,443,193
Fixed Income Funds — 18.3%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		6,884,087		69,598,116
MassMutual Select T. Rowe Price Emerging Markets Bond Fund, Class I (a)		783,907		7,094,354
MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I (a)		708,829		7,407,268
MassMutual Select T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I (a)		2,160,334		16,612,966
State Street Institutional U.S. Government Money Market Fund		23,325,287		23,325,287
T. Rowe Price Dynamic Global Bond Fund, Class I		1,244,833		11,863,257
T. Rowe Price Institutional Floating Rate Fund		540,814		5,272,935
T. Rowe Price Institutional High Yield Fund		865,042		7,638,321
				148,812,504
TOTAL MUTUAL FUNDS (Cost $715,659,331)				811,255,697
TOTAL LONG-TERM INVESTMENTS (Cost $715,659,331)				811,255,697
TOTAL INVESTMENTS — 100.0% (Cost $715,659,331) (b)				811,255,697
Other Assets/(Liabilities) — (0.0)%				(401,641)
NET ASSETS — 100.0%			$	810,854,056

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 90.1%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		32,669,318	$	369,163,295
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		35,555,656		555,023,786
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		2,800,123		36,429,599
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		13,068,974		190,807,014
MM S&P 500 Index Fund, Class I (a)		6,534,209		136,826,343
				1,288,250,037
Fixed Income Funds — 10.0%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		6,688,119		67,616,886
MassMutual Select T. Rowe Price Emerging Markets Bond Fund, Class I (a)		478,605		4,331,372
MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I (a)		1,250,514		13,067,874
MassMutual Select T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I (a)		2,195,017		16,879,678
State Street Institutional U.S. Government Money Market Fund		21,624,077		21,624,077
T. Rowe Price Dynamic Global Bond Fund, Class I		1,218,737		11,614,559
T. Rowe Price Institutional High Yield Fund		782,565		6,910,052
				142,044,498
TOTAL MUTUAL FUNDS (Cost $1,220,024,695)				1,430,294,535
TOTAL LONG-TERM INVESTMENTS (Cost $1,220,024,695)				1,430,294,535
TOTAL INVESTMENTS — 100.1% (Cost $1,220,024,695) (b)				1,430,294,535
Other Assets/(Liabilities) — (0.1)%				(826,416)
NET ASSETS — 100.0%			$	1,429,468,119

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 94.5%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		14,671,566	$	165,788,690
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		16,085,160		251,089,342
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		1,272,460		16,554,709
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		6,175,837		90,167,221
MM S&P 500 Index Fund, Class I (a)		2,881,584		60,340,359
				583,940,321
Fixed Income Funds — 5.6%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		1,329,381		13,440,041
MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I (a)		538,704		5,629,454
MassMutual Select T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I (a)		508,737		3,912,188
State Street Institutional U.S. Government Money Market Fund		9,385,514		9,385,514
T. Rowe Price Dynamic Global Bond Fund, Class I		210,048		2,001,758
				34,368,955
TOTAL MUTUAL FUNDS (Cost $534,262,281)				618,309,276
TOTAL LONG-TERM INVESTMENTS (Cost $534,262,281)				618,309,276
TOTAL INVESTMENTS — 100.1% (Cost $534,262,281) (b)				618,309,276
Other Assets/(Liabilities) — (0.1)%				(323,788)
NET ASSETS — 100.0%			$	617,985,488

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 95.6%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		22,939,321	$	259,214,332
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		25,217,500		393,645,179
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		1,980,943		25,772,062
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		9,624,734		140,521,112
MM S&P 500 Index Fund, Class I (a)		4,513,010		94,502,434
				913,655,119
Fixed Income Funds — 4.5%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		1,873,340		18,939,464
MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I (a)		834,056		8,715,889
MassMutual Select T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I (a)		533,092		4,099,475
State Street Institutional U.S. Government Money Market Fund		7,954,060		7,954,060
T. Rowe Price Dynamic Global Bond Fund, Class I		297,679		2,836,882
				42,545,770
TOTAL MUTUAL FUNDS (Cost $814,064,600)				956,200,889
TOTAL LONG-TERM INVESTMENTS (Cost $814,064,600)				956,200,889
TOTAL INVESTMENTS — 100.1% (Cost $814,064,600) (b)				956,200,889
Other Assets/(Liabilities) — (0.1)%				(566,152)
NET ASSETS — 100.0%			$	955,634,737

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

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 95.6%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		8,505,434	$	96,111,400
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		9,330,471		145,648,657
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		734,731		9,558,850
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		3,578,955		52,252,748
MM S&P 500 Index Fund, Class I (a)		1,672,396		35,019,966
				338,591,621
Fixed Income Funds — 4.5%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		687,351		6,949,118
MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I (a)		309,877		3,238,213
MassMutual Select T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I (a)		197,088		1,515,606
State Street Institutional U.S. Government Money Market Fund		3,064,408		3,064,408
T. Rowe Price Dynamic Global Bond Fund, Class I		107,366		1,023,198
				15,790,543
TOTAL MUTUAL FUNDS (Cost $309,433,656)				354,382,164
TOTAL LONG-TERM INVESTMENTS (Cost $309,433,656)				354,382,164
TOTAL INVESTMENTS — 100.1% (Cost $309,433,656) (b)				354,382,164
Other Assets/(Liabilities) — (0.1)%				(178,965)
NET ASSETS — 100.0%			$	354,203,199

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 2060 Fund —  Portfolio of Investments

December 31, 2021 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Equity Funds — 95.6%
MassMutual Select T. Rowe Price International Equity Fund, Class I (a)		3,139,074	$	35,471,537
MassMutual Select T. Rowe Price Large Cap Blend Fund, Class I (a)		3,447,187		53,810,594
MassMutual Select T. Rowe Price Real Assets Fund, Class I (a)		270,323		3,516,899
MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I (a)		1,309,652		19,120,922
MM S&P 500 Index Fund, Class I (a)		619,466		12,971,616
				124,891,568
Fixed Income Funds — 4.4%
MassMutual Select T. Rowe Price Bond Asset Fund, Class I (a)		253,141		2,559,254
MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund, Class I (a)		113,450		1,185,553
MassMutual Select T. Rowe Price U.S. Treasury Long-Term Index Fund, Class I (a)		73,168		562,665
State Street Institutional U.S. Government Money Market Fund		1,125,464		1,125,464
T. Rowe Price Dynamic Global Bond Fund, Class I		40,955		390,300
				5,823,236
TOTAL MUTUAL FUNDS (Cost $120,614,093)				130,714,804
TOTAL LONG-TERM INVESTMENTS (Cost $120,614,093)				130,714,804
TOTAL INVESTMENTS — 100.0% (Cost $120,614,093) (b)				130,714,804
Other Assets/(Liabilities) — (0.0)%				(37,822)
NET ASSETS — 100.0%			$	130,676,982

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 Select BlackRock Global Allocation Fund (“MM Select BlackRock Global Allocation 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 Fundamental Growth Fund (“Fundamental Growth 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”)

MM S&P^® Mid Cap Index Fund (“S&P Mid Cap Index Fund”)

MM Russell 2000^® Small Cap Index Fund (“Russell 2000 Small Cap Index Fund”)

MassMutual Mid Cap Growth Fund (“Mid Cap Growth Fund”)

MassMutual Small Cap Growth Equity Fund (“Small Cap Growth Equity Fund”)

MM MSCI EAFE^® International Index Fund (“MSCI EAFE International Index 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”)

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”)

Notes to Portfolio of Investments (Unaudited) (Continued)

MassMutual RetireSMART^SM by JPMorgan 2060 Fund (“MM RetireSMART by JPMorgan 2060 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 Emerging Markets Bond Fund (“MM Select T. Rowe Price Emerging Markets Bond Fund”)

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

MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund (“MM Select T. Rowe Price Limited Duration Inflation Focused Bond 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 U.S. Treasury Long-Term Index Fund (“MM Select T. Rowe Price U.S. Treasury Long-Term Index 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”)

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”)

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 series of the Trust, MassMutual Premier Funds, and MassMutual Advantage Funds (advised by MML Investment Advisers, LLC, a wholly-owned subsidiary of Massachusetts Mutual Life Insurance Company (“MassMutual”)) 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, and MM RetireSMART by JPMorgan 2060 Fund (the “MM RetireSMART by JPMorgan Funds”) invest their investable assets in shares of series of the Trust, MassMutual Premier Funds, MassMutual Advantage 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”).

Notes to Portfolio of Investments (Unaudited) (Continued)

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, and MM Select T. Rowe Price Retirement 2060 Fund (the “MM Select T. Rowe Price Retirement Funds”) invest their investable assets primarily in shares of series of the Trust 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”).

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.

Basis of Consolidation

The accompanying portfolio of investments for the MM Select BlackRock Global Allocation Fund includes the accounts of MassMutual Select Cayman Global Allocation Fund I, Ltd. (the “Subsidiary”), a wholly owned subsidiary of the MM Select BlackRock Global Allocation Fund, which primarily invests in commodity-related investments consistent with the MM Select BlackRock Global Allocation Fund’s investment objectives and policies as stated in its Prospectus and Statement of Additional Information. The Subsidiary allows the MM Select BlackRock Global Allocation Fund to hold these commodity-related investments and still satisfy regulated investment company tax requirements. The MM Select BlackRock Global Allocation Fund may invest up to 25% of its total assets in the Subsidiary. Intercompany accounts and transactions have been eliminated. As of December 31, 2021, the MM Select BlackRock Global Allocation Fund’s net assets were approximately $684,270,374, of which approximately $6,479,840 or approximately 0.95%, represents the Subsidiary’s net assets.

Investment Valuation

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

Notes to Portfolio of Investments (Unaudited) (Continued)

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.

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.

Notes to Portfolio of Investments (Unaudited) (Continued)

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

The Funds 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.

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

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

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

Notes to Portfolio of Investments (Unaudited) (Continued)

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

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

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

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

Notes to Portfolio of Investments (Unaudited) (Continued)

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

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

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

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

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

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

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

The Fundamental Value Fund, Fundamental Growth Fund, and Growth Opportunities Fund characterized all long-term investments at Level 1, and all short-term investments at Level 2, as of December 31, 2021. 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 December 31, 2021. 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 December 31, 2021, for the remaining Funds’ investments:

Total Return Bond Fund
Asset Investments		Level 1			Level 2			Level 3		Total
Bank Loans (Less Unfunded Loan Commitments)	$	—		$	20,893,842		$	—	$	20,893,842
Corporate Debt		—			216,639,545			—		216,639,545
Municipal Obligations		—			3,361,350			—		3,361,350
Non-U.S. Government Agency Obligations		—			103,262,544			—		103,262,544
Sovereign Debt Obligations		—			8,742,572			—		8,742,572
U.S. Government Agency Obligations and Instrumentalities		—			278,881,420			—		278,881,420
U.S. Treasury Obligations		—			323,635,198			—		323,635,198
Purchased Options		240,750			93,158			—		333,908
Mutual Funds		58,507,243			—			—		58,507,243
Short-Term Investments		—			88,603,471			—		88,603,471
Unfunded Loan Commitments**		—			14,242			—		14,242
Total Investments	$	58,747,993		$	1,044,127,342		$	—	$	1,102,875,335
Asset Derivatives
Forward Contracts	$	—		$	77,396		$	—	$	77,396
Futures Contracts		102,217			—			—		102,217
Swap Agreements		—			44,260			—		44,260
Total	$	102,217		$	121,656		$	—	$	223,873
Liability Derivatives
Swap Agreements	$	—		$	(665,538	)	$	—	$	(665,538	)
Written Options		(666,094	)		—			—		(666,094	)
Total	$	(666,094	)	$	(665,538	)	$	—	$	(1,331,632	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Strategic Bond Fund
Asset Investments		Level 1			Level 2			Level 3		Total
Bank Loans	$	—		$	23,023,692		$	—	$	23,023,692
Corporate Debt		—			167,239,117			—		167,239,117
Municipal Obligations		—			178,121			—		178,121
Non-U.S. Government Agency Obligations		—			53,128,171			—		53,128,171
Sovereign Debt Obligations		—			31,619,673			—		31,619,673
U.S. Government Agency Obligations and Instrumentalities		—			56,841,568			—		56,841,568
U.S. Treasury Obligations		—			56,977,669			—		56,977,669
Purchased Options		98,616			—			—		98,616
Short-Term Investments		—			162,689,185			—		162,689,185
Total Investments	$	98,616		$	551,697,196		$	—	$	551,795,812
Asset Derivatives
Forward Contracts	$	—		$	129,563		$	—	$	129,563
Futures Contracts		1,101,122			—			—		1,101,122
Swap Agreements		—			3,361,217			—		3,361,217
Total	$	1,101,122		$	3,490,780		$	—	$	4,591,902
Liability Derivatives
Forward Contracts	$	—		$	(303,972	)	$	—	$	(303,972	)
Futures Contracts		(1,761,020	)		—			—		(1,761,020	)
Swap Agreements		—			(614,613	)		—		(614,613	)
Written Options		(178,000	)		—			—		(178,000	)
Total	$	(1,939,020	)	$	(918,585	)	$	—	$	(2,857,605	)

Notes to Portfolio of Investments (Unaudited) (Continued)

MM Select BlackRock Global Allocation Fund
Asset Investments		Level 1			Level 2			Level 3			Total
Common Stock*
Australia	$	—		$	770,098		$	130,542		$	900,640
Belgium		—			119,481			—			119,481
Bermuda		330,156			32,896			—			363,052
Brazil		—			198,133			—			198,133
British Virgin Islands		493,381			—			—			493,381
Canada		7,603,737			—			—			7,603,737
Cayman Islands		5,467,292			5,574,067			—			11,041,359
China		—			6,138,196			—			6,138,196
Denmark		—			2,202,793			—			2,202,793
Finland		—			1,024,424			—			1,024,424
France		—			15,189,437			—			15,189,437
Germany		715,833			20,703,926			—			21,419,759
Hong Kong		—			2,495,699			—			2,495,699
India		—			467,985			—			467,985
Indonesia		—			189,884			—			189,884
Ireland		1,669,167			—			—			1,669,167
Israel		2,711,909			—			—			2,711,909
Italy		—			5,152,893			—			5,152,893
Japan		—			14,949,872			—			14,949,872
Luxembourg		—			282,283			—			282,283
Mexico		47,801			—			—			47,801
Netherlands		3,320,295			11,799,557			—			15,119,852
Norway		—			356,857			—			356,857
Poland		—			29,813			—			29,813
Portugal		—			159,860			—			159,860
Republic of Korea		—			3,846,958			—			3,846,958
Saudi Arabia		—			8,212			—			8,212
Singapore		—			409,766			—			409,766
South Africa		—			94,802			—			94,802
Spain		—			2,685,101			—			2,685,101
Sweden		—			6,224,688			—			6,224,688
Switzerland		2,791,098			4,120,332			—			6,911,430
Taiwan		—			6,081,580			—			6,081,580
Thailand		129,005			—			—			129,005
Turkey		—			8,907			—			8,907
United Kingdom		2,870,432			17,291,330			—+			20,161,762
United States		298,236,847			—			40,895			298,277,742
Preferred Stock*
Brazil		—			148,186			—			148,186
Germany		—			1,166,285			—			1,166,285
United Kingdom		655,545			—			—			655,545
United States		2,641,573			—			2,443,118			5,084,691
Bank Loans (Less Unfunded Loan Commitments)		—			21,325,345			—			21,325,345
Corporate Debt		—			33,215,846			2,381,676			35,597,522
Non-U.S. Government Agency Obligations		—			21,639,703			—			21,639,703
Sovereign Debt Obligations		—			16,924,351			—			16,924,351
U.S. Government Agency Obligations and Instrumentalities		—			466,758			—			466,758
U.S. Treasury Obligations		—			10,929,678			—			10,929,678
Mutual Funds		26,463,689			—			—			26,463,689
Purchased Options		1,701,024			560,050			—			2,261,074
Warrants		124,406			5,482			—			129,888
Short-Term Investments		—			92,560,505			—			92,560,505
Unfunded Loan Commitments**		—			(21	)		—			(21	)
Total Investments	$	357,973,190		$	327,551,998		$	4,996,231		$	690,521,419
Liability Investments
Equities Sold Short	$	(837,114	)	$	—		$	—		$	(837,114	)
Asset Derivatives
Forward Contracts	$	—		$	758,140		$	—		$	758,140
Futures Contracts		842,406			—			—			842,406
Swap Agreements		—			8,251,967			—			8,251,967
Total	$	842,406		$	9,010,107		$	—		$	9,852,513
Liability Derivatives
Forward Contracts	$	—		$	(1,121,630	)	$	—		$	(1,121,630	)
Futures Contracts		(1,477,091	)		—			—			(1,477,091	)
Swap Agreements		—			(5,151,805	)		(21,991	)		(5,173,796	)
Written Options		(751,172	)		(585,293	)		—			(1,336,465	)
Total	$	(2,228,263	)	$	(6,858,728	)	$	(21,991	)	$	(9,108,982	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Diversified Value Fund
Asset Investments		Level 1		Level 2			Level 3		Total
Common Stock	$	378,901,443	$	5,029,657	*	$	—	$	383,931,100
Preferred Stock		1,839,149		1,651,475	*		—		3,490,624
Mutual Funds		3,728,047		—			—		3,728,047
Short-Term Investments		104		7,458,135			—		7,458,239
Total Investments	$	384,468,743	$	14,139,267		$	—	$	398,608,010

Notes to Portfolio of Investments (Unaudited) (Continued)

S&P 500 Index Fund
Asset Investments		Level 1		Level 2		Level 3		Total
Common Stock	$	3,618,204,944	$	—	$	—	$	3,618,204,944
Short-Term Investments		—		24,220,235		—		24,220,235
Total Investments	$	3,618,204,944	$	24,220,235	$	—	$	3,642,425,179
Asset Derivatives
Futures Contracts	$	257,906	$	—	$	—	$	257,906

Notes to Portfolio of Investments (Unaudited) (Continued)

Equity Opportunities Fund
Asset Investments		Level 1		Level 2		Level 3		Total
Common Stock	$	764,386,488	$	22,730,463	$	—	$	787,116,951
Preferred Stock		2,935,816		2,718,103		—		5,653,919
Mutual Funds		783,810		—		—		783,810
Short-Term Investments		156		17,702,521		—		17,702,677
Total Investments	$	768,106,270	$	43,151,087	$	—	$	811,257,357

Notes to Portfolio of Investments (Unaudited) (Continued)

Blue Chip Growth Fund
Asset Investments		Level 1		Level 2			Level 3		Total
Common Stock	$	4,196,723,972	$	41,839,798	*	$	6,293,856	$	4,244,857,626
Preferred Stock		—		—			4,231,878		4,231,878
Short-Term Investments		100		37,993,273			—		37,993,373
Total Investments	$	4,196,724,072	$	79,833,071		$	10,525,734	$	4,287,082,877

Notes to Portfolio of Investments (Unaudited) (Continued)

Mid Cap Value Fund
Asset Investments		Level 1		Level 2			Level 3		Total
Common Stock	$	119,284,283	$	2,606,566		$	—	$	121,890,849
Mutual Funds		12,994		—			—		12,994
Short-Term Investments		—		960,825			—		960,825
Total Investments	$	119,297,277	$	3,567,391		$	—	$	122,864,668
Asset Derivatives
Forward Contracts	$	—	$	4,524		$	—	$	4,524
Liability Derivatives
Forward Contracts	$	—	$	(35,064	)	$	—	$	(35,064	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Small Cap Value Equity Fund
Asset Investments		Level 1		Level 2			Level 3			Total
Common Stock	$	63,493,800	$	1,186,513	*	$	—	+	$	64,680,313
Mutual Funds		340,620		—			—			340,620
Short-Term Investments		—		1,992,564			—			1,992,564
Total Investments	$	63,834,420	$	3,179,077		$	—		$	67,013,497

Notes to Portfolio of Investments (Unaudited) (Continued)

Small Company Value Fund
Asset Investments		Level 1		Level 2			Level 3			Total
Common Stock	$	293,215,548	$	663,700	*	$	—	+	$	293,879,248
Mutual Funds		1,062,233		—			—			1,062,233
Short-Term Investments		—		2,387,399			—			2,387,399
Total Investments	$	294,277,781	$	3,051,099		$	—		$	297,328,880
Liability Derivatives
Forward Contracts	$	—	$	(5,479	)	$	—		$	(5,479	)

Notes to Portfolio of Investments (Unaudited) (Continued)

S&P Mid Cap Index Fund
Asset Investments		Level 1		Level 2		Level 3		Total
Common Stock	$	463,411,941	$	—	$	—	$	463,411,941
Mutual Funds		1,458,188		—		—		1,458,188
Short-Term Investments		—		2,379,134		—		2,379,134
Total Investments	$	464,870,129	$	2,379,134	$	—	$	467,249,263
Asset Derivatives
Futures Contracts	$	85,250	$	—	$	—	$	85,250

Notes to Portfolio of Investments (Unaudited) (Continued)

Russell 2000 Small Cap Index Fund
Asset Investments		Level 1		Level 2		Level 3		Total
Common Stock	$	290,284,745	$	—	$	—+	$	290,284,745
Warrants		—		1,216		—		1,216
Rights		—		—		10,471		10,471
Corporate Debt		—		990		—		990
Mutual Funds		3,792,218		—		—		3,792,218
Short-Term Investments		—		2,188,994		—		2,188,994
Total Investments	$	294,076,963	$	2,191,200	$	10,471	$	296,278,634
Asset Derivatives
Futures Contracts	$	62,218	$	—	$	—	$	62,218

Notes to Portfolio of Investments (Unaudited) (Continued)

Mid Cap Growth Fund
Asset Investments		Level 1		Level 2		Level 3		Total
Common Stock	$	8,398,007,999	$	154,633,185	$	9,187,063	$	8,561,828,247
Preferred Stock		—		—		36,928,946		36,928,946
Mutual Funds		62,714,082		—		—		62,714,082
Short-Term Investments		103,905,748		92,604,728		—		196,510,476
Total Investments	$	8,564,627,829	$	247,237,913	$	46,116,009	$	8,857,981,751

Notes to Portfolio of Investments (Unaudited) (Continued)

Small Cap Growth Equity Fund
Asset Investments		Level 1		Level 2		Level 3		Total
Common Stock	$	767,310,595	$	1,245,547	$	—	$	768,556,142
Mutual Funds		12,815,290		—		—		12,815,290
Short-Term Investments		—		14,099,397		—		14,099,397
Total Investments	$	780,125,885	$	15,344,944	$	—	$	795,470,829

Notes to Portfolio of Investments (Unaudited) (Continued)

MSCI EAFE International Index Fund
Asset Investments	Level 1		Level 2			Level 3		Total
Common Stock*
Australia	$	894,047	$	12,025,690		$	—	$	12,919,737
Austria		—		450,300			—		450,300
Belgium		—		1,523,961			—		1,523,961
Bermuda		201,543		50,942			—		252,485
Cayman Islands		388,601		821,308			—		1,209,909
Denmark		—		5,156,997			—		5,156,997
Finland		—		2,398,328			—		2,398,328
France		271,410		20,423,406			—		20,694,816
Germany		294,892		15,492,303			—		15,787,195
Hong Kong		211,403		3,944,373			—		4,155,776
Ireland		203,303		1,411,797			—		1,615,100
Israel		571,908		829,219			—		1,401,127
Italy		—		3,491,671			—		3,491,671
Japan		592,661		42,625,834			—		43,218,495
Luxembourg		—		572,104			—		572,104
Netherlands		644,293		11,383,182			—		12,027,475
New Zealand		405,197		148,007			—		553,204
Norway		—		1,253,860			—		1,253,860
Portugal		—		298,525			—		298,525
Singapore		200,861		1,770,554			—		1,971,415
Spain		—		4,361,010			—		4,361,010
Sweden		—		7,127,013			—		7,127,013
Switzerland		—		20,081,610			—		20,081,610
United Kingdom		540,872		27,378,632			—		27,919,504
Preferred Stock*
Germany		—		1,012,124			—		1,012,124
Mutual Funds		1,703,065		—			—		1,703,065
Short-Term Investments		—		1,706,029			—		1,706,029
Total Investments	$	7,124,056	$	187,738,779		$	—	$	194,862,835
Asset Derivatives
Futures Contracts	$	70,204	$	—		$	—	$	70,204
Forward Contracts		—		17,018			—		17,018
Total	$	70,204	$	17,018		$	—	$	87,222
Liability Derivatives
Forward Contracts	$	—	$	(13,144	)	$	—	$	(13,144	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Overseas Fund
Asset Investments		Level 1		Level 2			Level 3		Total
Common Stock*
Australia	$	—	$	4,490,228		$	—	$	4,490,228
Belgium		—		7,743,592			—		7,743,592
Brazil		1,121,235		—			—		1,121,235
Canada		22,554,294		—			—		22,554,294
Cayman Islands		1,917,787		10,999,451			—		12,917,238
Denmark		—		13,498,104			—		13,498,104
Finland		—		1,647,792			—		1,647,792
France		—		110,539,411			—		110,539,411
Germany		1,798,993		92,445,176			—		94,244,169
Hong Kong		—		8,436,132			—		8,436,132
India		—		13,730,287			—		13,730,287
Indonesia		—		1,364,618			—		1,364,618
Ireland		6,547,073		5,702,013			—		12,249,086
Israel		4,345,124		—			—		4,345,124
Italy		—		14,355,688			—		14,355,688
Japan		—		75,257,836			—		75,257,836
Mexico		2,394,035		—			—		2,394,035
Netherlands		—		38,396,704			—		38,396,704
Portugal		—		2,120,777			—		2,120,777
Republic of Korea		—		2,700,069			—		2,700,069
Singapore		—		4,815,617			—		4,815,617
South Africa		—		1,670,264			—		1,670,264
Spain		—		6,714,439			—		6,714,439
Sweden		—		10,426,077			—		10,426,077
Switzerland		—		86,055,429			—		86,055,429
Taiwan		6,442,240		—			—		6,442,240
United Kingdom		4,088,876		80,209,389			—		84,298,265
United States		2,269,664		—			—		2,269,664
Preferred Stock*
Germany		—		153,868			—		153,868
Republic of Korea		—		2,855,159			—		2,855,159
Mutual Funds		7,702,956		—			—		7,702,956
Short-Term Investments		—		9,879,915			—		9,879,915
Total Investments	$	61,182,277	$	606,208,035		$	—	$	667,390,312
Liability Derivatives
Forward Contracts	$	—	$	(40,339	)	$	—	$	(40,339	)

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*
Australia	$	—	$	38,711,388		$	—	$	38,711,388
Austria		—		12,470,700			—		12,470,700
Belgium		—		5,070,301			—		5,070,301
Bermuda		—		7,174,914			—		7,174,914
Brazil		—		14,587,270			—		14,587,270
British Virgin Islands		435,442		—			—		435,442
Canada		62,270,721		—			—		62,270,721
Cayman Islands		36,125,840		51,101,166			—		87,227,006
Chile		1,508,552		1,202,995			—		2,711,547
China		—		61,767,690			—		61,767,690
Cyprus		542,159		—			—		542,159
Czech Republic		—		1,106,036			—		1,106,036
Denmark		—		2,275,658			—		2,275,658
Finland		—		13,410,603			—		13,410,603
France		—		129,106,415			—		129,106,415
Germany		905,489		106,123,839			—		107,029,328
Hong Kong		—		27,738,634			—		27,738,634
Hungary		—		6,420,763			—		6,420,763
India		2,844,140		66,696,945			—		69,541,085
Indonesia		—		12,519,255			—		12,519,255
Ireland		1,409,470		7,474,369			—		8,883,839
Italy		—		23,560,366			—		23,560,366
Japan		—		266,714,865			—		266,714,865
Luxembourg		1,431,622		4,793,609			—		6,225,231
Malaysia		—		3,531,042			—		3,531,042
Mexico		13,014,439		—			—		13,014,439
Netherlands		17,757,566		110,034,936			—		127,792,502
Norway		—		13,337,507			—		13,337,507
Philippines		5,039,329		—			—		5,039,329
Poland		2,214,591		—			—		2,214,591
Portugal		—		13,611,526			—		13,611,526
Republic of Korea		2,239,584		67,422,719			—		69,662,303
Russia		—		13,482,258			—		13,482,258
Saudi Arabia		732,638		8,887,548			—		9,620,186
Singapore		—		17,164,598			—		17,164,598
South Africa		—		11,578,617			—		11,578,617
Spain		—		15,746,618			—		15,746,618
Sweden		440,804		22,450,162			—		22,890,966
Switzerland		—		116,262,631			—		116,262,631
Taiwan		—		71,401,146			—		71,401,146
Thailand		7,810,663		2,087,800			—		9,898,463
Turkey		159,825		—			—		159,825
United Arab Emirates		—		2,990,782			—		2,990,782
United Kingdom		43,189,502		165,998,839			—		209,188,341
United States		19,884,005		953,974			652,694		21,490,673
Preferred Stock*
Brazil		—		3,943,598			—		3,943,598
Germany		—		5,005,893			—		5,005,893
Italy		—		1,009,275			—		1,009,275
Republic of Korea		—		1,076,281			—		1,076,281
United States		—		—			39,196		39,196
Mutual Funds		12,375,372		—			—		12,375,372
Rights		—		171,130			—		171,130
Short-Term Investments		34,889,042		1,469,293			—		36,358,335
Total Investments	$	267,220,795	$	1,529,645,954		$	691,890	$	1,797,558,639
Asset Derivatives
Forward Contracts	$	—	$	91		$	—	$	91
Liability Derivatives
Forward Contracts	$	—	$	(76	)	$	—	$	(76	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Equity Asset Fund
Asset Investments		Level 1		Level 2			Level 3			Total
Common Stock	$	419,793,422	$	13,504	*	$	—	+	$	419,806,926
Rights		—		—			3,843			3,843
Mutual Funds		7,779		—			—			7,779
Short-Term Investments		—		3,920,550			—			3,920,550
Total Investments	$	419,801,201	$	3,934,054		$	3,843		$	423,739,098
Asset Derivatives
Futures Contracts	$	42,615	$	—		$	—		$	42,615

Notes to Portfolio of Investments (Unaudited) (Continued)

MM Select T. Rowe Price Bond Asset Fund
Asset Investments		Level 1			Level 2			Level 3		Total
Preferred Stock	$	—		$	232,123		$	—	$	232,123
Bank Loans		—			19,726,387			—		19,726,387
Corporate Debt		—			241,602,921			—		241,602,921
Municipal Obligations		—			532,500			—		532,500
Non-U.S. Government Agency Obligations		—			75,554,898			610,000		76,164,898
Sovereign Debt Obligations		—			126,984,356			—		126,984,356
U.S. Government Agency Obligations and Instrumentalities		—			142,114,276			—		142,114,276
U.S. Treasury Obligations		—			138,965,056			—		138,965,056
Mutual Funds		3,973,213			—			—		3,973,213
Purchased Options		—			95,149			—		95,149
Short-Term Investments		102,412,072			3,480,528			—		105,892,600
Total Investments	$	106,385,285		$	749,288,194		$	610,000	$	856,283,479
Asset Derivatives
Forward Contracts	$	—		$	2,625,208		$	—	$	2,625,208
Futures Contracts		1,170,609			—			—		1,170,609
Swap Agreements		—			2,039,593			—		2,039,593
Total	$	1,170,609		$	4,664,801		$	—	$	5,835,410
Liability Derivatives
Forward Contracts	$	—		$	(923,941	)	$	—	$	(923,941	)
Futures Contracts		(111,029	)		—			—		(111,029	)
Swap Agreements		—			(567,895	)		—		(567,895	)
Total	$	(111,029	)	$	(1,491,836	)	$	—	$	(1,602,865	)

Notes to Portfolio of Investments (Unaudited) (Continued)

MM Select T. Rowe Price Emerging Markets Bond Fund
Asset Investments		Level 1			Level 2			Level 3		Total
Corporate Debt	$	—		$	35,558,295		$	—	$	35,558,295
Sovereign Debt Obligations		—			63,728,443			—		63,728,443
Mutual Funds		1,108,985			—			—		1,108,985
Short-Term Investments		2,865,319			1,018,546			—		3,883,865
Total Investments	$	3,974,304		$	100,305,284		$	—	$	104,279,588
Asset Derivatives
Forward Contracts	$	—		$	28,896		$	—	$	28,896
Futures Contracts		59,717			—			—		59,717
Total	$	59,717		$	28,896		$	—	$	88,613
Liability Derivatives
Forward Contracts	$	—		$	(1,481	)	$	—	$	(1,481	)
Futures Contracts		(17,194	)		—			—		(17,194	)
Total	$	(17,194	)	$	(1,481	)	$	—	$	(18,675	)

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	$	2,375,981,895	$	85,004,698	*	$	7,933,845	$	2,468,920,438
Preferred Stock		2,639,791		—			12,711,477		15,351,268
Mutual Funds		4,810,724		—			—		4,810,724
Short-Term Investments		27,678,011		4,417,252			—		32,095,263
Total Investments	$	2,411,110,421	$	89,421,950		$	20,645,322	$	2,521,177,693

Notes to Portfolio of Investments (Unaudited) (Continued)

MM Select T. Rowe Price Limited Duration Inflation Focused Bond Fund

Asset Investments		Level 1			Level 2			Level 3		Total
Corporate Debt	$	—		$	11,982,289		$	—	$	11,982,289
Municipal Obligations		—			939,576			—		939,576
Non-U.S. Government Agency Obligations		—			14,897,816			—		14,897,816
U.S. Government Agency Obligations and Instrumentalities		—			2,614,918			—		2,614,918
U.S. Treasury Obligations		—			272,363,067			—		272,363,067
Short-Term Investments		574			1,083,282			—		1,083,856
Total Investments	$	574		$	303,880,948		$	—	$	303,881,522
Asset Derivatives
Forward Contracts	$	—		$	134,002		$	—	$	134,002
Swap Agreements		—			2,691,768			—		2,691,768
Total	$	—		$	2,825,770		$	—	$	2,825,770
Liability Derivatives
Forward Contracts	$	—		$	(62,373	)	$	—	$	(62,373	)
Futures Contracts		(176,412	)		—			—		(176,412	)
Written Options		(52,297	)		—			—		(52,297	)
Total	$	(228,709	)	$	(62,373	)	$	—	$	(291,082	)

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	$	—		$	14,339,532	$	—	$	14,339,532
Austria		—			317,208		—		317,208
Belgium		—			82,041		—		82,041
Bermuda		—			552,902		—		552,902
Brazil		—			676,241		—		676,241
Canada		8,999,783			147,912		—		9,147,695
Cayman Islands		401,481			230,319		—		631,800
Denmark		—			330,451		—		330,451
Finland		—			2,541,478		—		2,541,478
France		626,205			4,079,732		—		4,705,937
Germany		—			928,433		—		928,433
Hong Kong		—			716,225		—		716,225
Ireland		1,199,341			—		—		1,199,341
Japan		—			4,347,799		—		4,347,799
Kazakhstan		—			627,794		—		627,794
Luxembourg		64,023			340,801		—		404,824
Mexico		693,465			—		—		693,465
Netherlands		—			1,443,369		—		1,443,369
Norway		—			2,002,938		—		2,002,938
Portugal		—			799,881		—		799,881
Russia		—			2,359,680		—		2,359,680
Singapore		631,650			418,460		—		1,050,110
South Africa		—			432,091		—		432,091
Spain		—			772,193		—		772,193
Sweden		—			9,632,963		—		9,632,963
United Kingdom		—			9,168,587		—		9,168,587
United States		97,703,423			—		—		97,703,423
Preferred Stock
United States		1,123,125			—		459,768		1,582,893
Mutual Funds		14,518,070			—		—		14,518,070
Short-Term Investments		1,865,473			1,889,525		—		3,754,998
Total Investments	$	127,826,039		$	59,178,555	$	459,768	$	187,464,362
Asset Derivatives
Futures Contracts	$	44,915		$	—	$	—	$	44,915
Liability Derivatives
Futures Contracts	$	(50,647	)	$	—	$	—	$	(50,647	)

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	$	846,943,463	$	36,013,875	$	2,362,124	$	885,319,462
Preferred Stock		—		1,377,132		16,805,909		18,183,041
Corporate Debt		—		75,190		—		75,190
Rights		—		—		1,218		1,218
Warrants		31,122		12,678		3,856		47,656
Mutual Funds		4,956,949		—		—		4,956,949
Short-Term Investments		33,013,446		2,101,031		—		35,114,477
Total Investments	$	884,944,980	$	39,579,906	$	19,173,107	$	943,697,993

Notes to Portfolio of Investments (Unaudited) (Continued)

MM Select T. Rowe Price U.S. Treasury Long-Term Index Fund

Asset Investments	Level 1			Level 2		Level 3		Total
U.S. Government Agency Obligations and Instrumentalities	$	—		$	4,845,560	$	—	$	4,845,560
U.S. Treasury Obligations		—			122,730,059		—		122,730,059
Short-Term Investments		696,522			1,000,000		—		1,696,522
Total Investments	$	696,522		$	128,575,619	$	—	$	129,272,141
Asset Derivatives
Futures Contracts		29,705			—		—		29,705
Liability Derivatives
Futures Contracts		(445,722	)		—		—		(445,722	)
Written Options		(20,766	)		—		—		(20,766	)
Total	$	(466,488	)	$	—	$	—	$	(466,488	)

*	Includes foreign equity securities whose values were adjusted to reflect market trading of comparable securities or other correlated instruments after the close of trading in their respective foreign markets, as applicable.
**	Unfunded loan commitments are valued at the unrealized appreciation (depreciation) on the commitment.
+	Represents a security at $0 value as of December 31, 2021.

Notes to Portfolio of Investments (Unaudited) (Continued)

Derivative Instruments

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

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

Securities Lending

Each Fund, 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 December 31, 2021, the Funds’ collateral was equal to or greater than 100% of the market value of securities on loan and all of the Funds’ cash collateral was invested in the State Street Navigator Securities Lending Government Money Market Portfolio.

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

Notes to Portfolio of Investments (Unaudited) (Continued)

Accounting for Investment Transactions

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

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

Each of the MM Select BlackRock Global Allocation Fund and Strategic Bond Fund invests a significant amount of its assets in foreign securities and each of the MSCI EAFE International Index Fund, Overseas Fund, MM Select T. Rowe Price International Equity Fund, and MM Select T. Rowe Price Emerging Markets Bond 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, and diplomatic risks. In addition, fluctuations in currency exchange rates may adversely affect the values of foreign securities and the price of a Fund’s shares. Emerging markets securities are subject to greater risks than securities issued in developed foreign markets, including less liquidity, greater price volatility, higher relative rates of inflation, greater political, economic, and social instability, greater custody and operational risks, and greater volatility in currency exchange rates.

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 (the “Code”), applicable to a regulated investment company. Under such provisions, the Funds would not be subject to federal income taxes on their ordinary income and net realized capital gains to the extent they are distributed or deemed to have been distributed to their shareholders. Therefore, the Funds have not made any provision for federal income tax.

The Subsidiary is classified as a controlled foreign corporation under the Code. Therefore, the MM Select BlackRock Global Allocation Fund is required to increase its taxable income by its share of the Subsidiary’s income. Net losses of the Subsidiary cannot be deducted by the MM Select BlackRock Global Allocation Fund in the current period nor carried forward to offset taxable income in future periods.

Dividends and Distributions to Shareholders

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

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

3. Federal Income Tax Information

At December 31, 2021, the aggregate cost of investments and the unrealized appreciation (depreciation) in the value of all investments owned by the Fund(s), as computed on a federal income tax basis, were as follows:

Notes to Portfolio of Investments (Unaudited) (Continued)

	Federal Income Tax Cost		Tax Basis Unrealized Appreciation		Tax Basis Unrealized (Depreciation)		Net Unrealized Appreciation (Depreciation)
Total Return Bond Fund	$	1,091,660,643	$	16,337,017	$	(5,122,325)	$	11,214,692
Strategic Bond Fund		548,845,104		12,518,166		(9,567,458)		2,950,708
MM Select BlackRock Global Allocation Fund		591,063,996		118,567,133		(19,109,710)		99,457,423
Diversified Value Fund		309,883,993		92,822,792		(4,098,775)		88,724,017
Fundamental Value Fund		458,048,533		164,444,356		(6,606,422)		157,837,934
S&P 500 Index Fund		1,662,351,488		2,031,250,762		(51,177,071)		1,980,073,691
Equity Opportunities Fund		605,294,403		208,745,881		(2,782,927)		205,962,954
Fundamental Growth Fund		43,964,816		9,387,854		(2,579,231)		6,808,623
Blue Chip Growth Fund		2,279,377,233		2,069,655,698		(61,950,054)		2,007,705,644
Growth Opportunities Fund		301,853,930		169,785,832		(6,036,742)		163,749,090
Mid Cap Value Fund		111,894,304		13,538,633		(2,568,269)		10,970,364
Small Cap Value Equity Fund		48,705,164		18,865,438		(557,105)		18,308,333
Small Company Value Fund		237,447,222		64,302,907		(4,421,249)		59,881,658
S&P Mid Cap Index Fund		336,181,230		143,931,254		(12,863,221)		131,068,033
Russell 2000 Small Cap Index Fund		238,670,714		89,757,806		(32,149,886)		57,607,920
Mid Cap Growth Fund		5,933,103,004		3,219,117,522		(294,238,775)		2,924,878,747
Small Cap Growth Equity Fund		627,984,672		196,094,426		(28,608,269)		167,486,157
MSCI EAFE International Index Fund		153,796,298		53,668,081		(12,601,544)		41,066,537
Overseas Fund		525,674,141		162,164,335		(20,448,164)		141,716,171
MM Select T. Rowe Price International Equity Fund		1,557,125,713		335,422,168		(94,989,242)		240,432,926
20/80 Allocation Fund		203,998,288		5,848,381		(3,708,603)		2,139,778
40/60 Allocation Fund		232,197,461		10,902,056		(5,203,993)		5,698,063
60/40 Allocation Fund		207,165,547		14,877,057		(3,452,335)		11,424,722
80/20 Allocation Fund		142,669,191		12,082,794		(1,850,885)		10,231,909
MM RetireSMART by JPMorgan In Retirement Fund		110,298,352		4,364,241		(2,179,555)		2,184,686
MM RetireSMART by JPMorgan 2020 Fund		238,440,706		10,114,687		(4,149,960)		5,964,727
MM RetireSMART by JPMorgan 2025 Fund		192,027,401		10,915,131		(3,850,907)		7,064,224
MM RetireSMART by JPMorgan 2030 Fund		409,291,608		31,424,446		(6,683,237)		24,741,209
MM RetireSMART by JPMorgan 2035 Fund		177,820,803		15,219,955		(3,276,153)		11,943,802
MM RetireSMART by JPMorgan 2040 Fund		291,026,154		27,592,733		(4,683,432)		22,909,301
MM RetireSMART by JPMorgan 2045 Fund		123,876,834		12,512,183		(1,686,765)		10,825,418
MM RetireSMART by JPMorgan 2050 Fund		193,944,315		18,812,024		(2,682,756)		16,129,268
MM RetireSMART by JPMorgan 2055 Fund		61,681,613		5,693,623		(872,641)		4,820,982
MM RetireSMART by JPMorgan 2060 Fund		20,992,758		1,619,805		(326,538)		1,293,267
Equity Asset Fund		276,520,470		148,531,362		(1,312,734)		147,218,628
MM Select T. Rowe Price Bond Asset Fund		857,618,644		12,407,897		(13,743,062)		(1,335,165)
MM Select T. Rowe Price Emerging Markets Bond Fund		109,565,795		2,763,092		(8,049,299)		(5,286,207)
MM Select T. Rowe Price Large Cap Blend Fund		1,891,862,012		661,414,350		(32,098,669)		629,315,681
MM Select T. Rowe Price Limited Duration Inflation Focused Bond Fund		300,462,564		5,123,650		(1,704,692)		3,418,958
MM Select T. Rowe Price Real Assets Fund		153,872,838		37,047,409		(3,455,885)		33,591,524
MM Select T. Rowe Price Small and Mid Cap Blend Fund		694,448,246		276,359,137		(27,109,390)		249,249,747
MM Select T. Rowe Price U.S. Treasury Long-Term Index Fund		130,249,476		4,224,349		(5,201,684)		(977,335)
MM Select T. Rowe Price Retirement Balanced Fund		195,430,653		7,923,001		(2,589,091)		5,333,910

Notes to Portfolio of Investments (Unaudited) (Continued)

MM Select T. Rowe Price Retirement 2005 Fund	29,496,830	885,282	(332,824)	552,458
MM Select T. Rowe Price Retirement 2010 Fund	143,027,387	7,759,404	(1,473,616)	6,285,788
MM Select T. Rowe Price Retirement 2015 Fund	150,954,638	10,512,505	(1,651,501)	8,861,004
MM Select T. Rowe Price Retirement 2020 Fund	726,305,633	64,288,280	(8,466,288)	55,821,992
MM Select T. Rowe Price Retirement 2025 Fund	683,783,804	66,752,369	(8,726,544)	58,025,825
MM Select T. Rowe Price Retirement 2030 Fund	1,498,378,450	213,878,963	(15,012,920)	198,866,043
MM Select T. Rowe Price Retirement 2035 Fund	715,659,331	100,801,146	(5,204,780)	95,596,366
MM Select T. Rowe Price Retirement 2040 Fund	1,220,024,695	216,761,181	(6,491,341)	210,269,840
MM Select T. Rowe Price Retirement 2045 Fund	534,262,281	85,422,744	(1,375,749)	84,046,995
MM Select T. Rowe Price Retirement 2050 Fund	814,064,600	143,488,576	(1,352,287)	142,136,289
MM Select T. Rowe Price Retirement 2055 Fund	309,433,656	45,382,365	(433,857)	44,948,508
MM Select T. Rowe Price Retirement 2060 Fund	120,614,093	10,257,421	(156,710)	10,100,711

4. New Accounting Pronouncements

In January 2021, FASB issued Accounting Standards Update 2021-01 — Reference Rate Reform (Topic 848) — Scope (“ASU 2021-01”) as an update to Accounting Standards Update 2020-04 — Reference Rate Reform (Topic 848) — Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”) in order to make certain clarifications. ASU 2020-04 and ASU 2021-01 provide optional temporary financial reporting relief from the effect of certain types of contract modifications due to the planned discontinuation of the London Interbank Offered Rate (“LIBOR”) and other interbank-offered based reference rates. The temporary relief provided by ASU 2020-04 and ASU 2021-01 is effective for certain reference rate-related contract modifications that occur during the period March 12, 2020 through December 31, 2022. Management does not believe the impact of adopting ASU 2020-04 and ASU 2021-01 will have a material impact on the financial statements.

5. Legal Proceedings

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

Notes to Portfolio of Investments (Unaudited) (Continued)

In addition, on June 2, 2011, the Diversified Value Fund and S&P 500 Index Fund, were named as defendants in a closely related, parallel adversary proceeding brought in connection with the Tribune Company’s LBO by Deutsche Bank Trust Company Americas, in its capacity as successor indenture trustee for a certain series of Senior Notes, Law Debenture Trust Company of New York, in its capacity as successor indenture trustee for a certain series of Senior Notes, and Wilmington Trust Company, in its capacity as successor indenture trustee for the PHONES Notes (together, the “Plaintiffs”), in the United States District Court for the District of Massachusetts. The Plaintiffs also seek to recover payments of the Proceeds. On December 20, 2011, this action was transferred to the Southern District of New York for consolidated pretrial proceedings. This case also has been dismissed. The district court’s dismissal of the case was affirmed by the Second Circuit Court of Appeals, and the Plaintiffs’ petition for certiorari was denied by the United States Supreme Court.

6. Coronavirus (COVID-19) Pandemic

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