NPORT-P false 0000067160 XXXXXXXX S000011478 C000031708 C000067766 MML SERIES INVESTMENT FUND 811-02224 0000067160 VQ1HG47DNRJG3HBJH467 1295 State Street Springfield 01111-0001 413-744-1000 MML Small/Mid Cap Value Fund S000011478 5493001OCN5BF7GVLF58 2025-12-31 2025-06-30 N 124281300.88 4504046.92 119777253.96 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 UST Nexstar Media Group Inc 52990083ZRR5UT591988 65336K103 10576.00000000 NS USD 1829119.20000000 1.527100630150 Long EC CORP US N 1 N N N First BanCorp/Puerto Rico N/A 318672706 51957.00000000 NS USD 1082264.31000000 0.903564136110 Long EC CORP PR N 1 N N N Independence Realty Trust Inc 549300Z3L8NU44NQEB29 45378A106 84430.00000000 NS USD 1493566.70000000 1.246953533012 Long EC US N 1 N N Stifel Financial Corp 549300E5F07FE5GHJX84 860630102 13477.00000000 NS USD 1398643.06000000 1.167703394224 Long EC CORP US N 1 N N N Comerica Inc I9Q57JVPWHHZ3ZGBW498 200340107 15369.00000000 NS USD 916760.85000000 0.765388101405 Long EC CORP US N 1 N N N Core & Main Inc N/A 21874C102 23099.00000000 NS USD 1394024.65000000 1.163847561963 Long EC CORP US N 1 N N N Jones Lang LaSalle Inc 6SYKCME112RT8TQUO411 48020Q107 7686.00000000 NS USD 1965925.08000000 1.641317541522 Long EC CORP US N 1 N N N Avient Corp SM8L9RZYIB34LNTWO040 05368V106 37217.00000000 NS USD 1202481.27000000 1.003931239233 Long EC CORP US N 1 N N N Pentair PLC 549300EVR9D56WPSRP15 000000000 17581.00000000 NS USD 1804865.46000000 1.506851593544 Long EC CORP IE N 1 N N N Walker & Dunlop Inc N/A 93148P102 11937.00000000 NS USD 841319.76000000 0.702403613528 Long EC CORP US N 1 N N N Flagstar Financial Inc 529900HVXOTLY61GL030 649445400 67066.00000000 NS USD 710899.60000000 0.593518031593 Long EC CORP US N 1 N N N Nomad Foods Ltd 5493000ZZ1837DS2SI43 000000000 91032.00000000 NS USD 1546633.68000000 1.291258255525 Long EC CORP VG N 1 N N N State Street Global Advisors 5493008BJIBKQ5KTIF74 857509301 1570123.50000000 NS USD 1570123.50000000 1.310869508266 Long STIV RF US N 1 N N Belden Inc 68BKYO1JC791TTJHUE82 077454106 7435.00000000 NS USD 860973.00000000 0.718811770628 Long EC CORP US N 1 N N N MillerKnoll Inc U98HXD3PNK7HYU2MU887 600544100 55418.00000000 NS USD 1076217.56000000 0.898515806982 Long EC CORP US N 1 N N N TD SYNNEX Corp 5493004HI6PFLF46NS53 87162W100 10616.00000000 NS USD 1440591.20000000 1.202725185602 Long EC CORP US N 1 N N N CubeSmart N/A 229663109 17125.00000000 NS USD 727812.50000000 0.607638325255 Long EC US N 1 N N N Herc Holdings Inc 549300TP80QLITMSBP82 42704L104 9794.00000000 NS USD 1289771.86000000 1.076808673899 Long EC CORP US N 1 N N N Graphic Packaging Holding Co N/A 388689101 73767.00000000 NS USD 1554270.69000000 1.297634265783 Long EC CORP US N 1 N N Globant SA 2221008DCMSPYS42DS88 000000000 13315.00000000 NS USD 1209534.60000000 1.009819944948 Long EC CORP LU N 1 N N N WillScot Holdings Corp 549300HJ4VIXF476Q166 971378104 45686.00000000 NS USD 1251796.40000000 1.045103605746 Long EC CORP US N 1 N N N CNH Industrial NV 549300WGC2HZ5J67V817 000000000 100000.00000000 NS USD 1296000.00000000 1.082008442465 Long EC CORP NL N 1 N N N Group 1 Automotive Inc 549300US8QAZJLWYAF63 398905109 2836.00000000 NS USD 1238509.56000000 1.034010648143 Long EC CORP US N 1 N N N Wintrust Financial Corp Q774KI4AW80FHFW33O61 97650W108 11379.00000000 NS USD 1410768.42000000 1.177826651854 Long EC CORP US N 1 N N N GXO Logistics Inc 5493007CNWMXN78JRN66 36262G101 32748.00000000 NS USD 1594827.60000000 1.331494542805 Long EC CORP US N 1 N N N First Hawaiian Inc 5493002DJSH46F5OLV06 32051X108 44609.00000000 NS USD 1113440.64000000 0.929592725820 Long EC CORP US N 1 N N N MasTec Inc 549300TMDIT8WREDOF45 576323109 4981.00000000 NS USD 848911.83000000 0.708742104142 Long EC CORP US N 1 N N N BJ's Wholesale Club Holdings Inc 549300UCIWH1C93V0J03 05550J101 21962.00000000 NS USD 2368162.46000000 1.977138715161 Long EC CORP US N 1 N N N Dollar Tree Inc 549300PMSTQITB1WHR43 256746108 16257.00000000 NS USD 1610093.28000000 1.344239600398 Long EC CORP US N 1 N N N Regal Rexnord Corp QH78R09VCJGQKPBPYU33 758750103 11401.00000000 NS USD 1652688.96000000 1.379802011951 Long EC CORP US N 1 N N N UMB Financial Corp 549300MGEH3N3CUCV828 902788108 14925.00000000 NS USD 1569513.00000000 1.310359812159 Long EC CORP US N 1 N N N Ryman Hospitality Properties Inc 529900GCCWW9SRMPJR11 78377T107 9103.00000000 NS USD 898193.01000000 0.749886126375 Long EC US N 1 N N N Fluor Corp CQ7WZ4NOFWT7FAE6Q943 343412102 27007.00000000 NS USD 1384648.89000000 1.156019898788 Long EC CORP US N 1 N N N Calix Inc 5299002RQRZ4SXSCSJ58 13100M509 14888.00000000 NS USD 791892.72000000 0.661137815252 Long EC CORP US N 1 N N N Robert Half Inc 529900VPCUY9H3HLIC08 770323103 9505.00000000 NS USD 390180.25000000 0.325754880079 Long EC CORP US N 1 N N N COPT Defense Properties YY1J47X6LF9TYY8JY420 22002T108 58300.00000000 NS USD 1607914.00000000 1.342420156448 Long EC US N 1 N N N American Healthcare REIT Inc 2549004GGE2APGNT6O92 398182303 42020.00000000 NS USD 1543814.80000000 1.288904820372 Long EC US N 1 N N N Nice Ltd 254900YTY4EF5Z4W0A51 653656108 6710.00000000 NS USD 1133386.10000000 0.946244852447 Long EC CORP IL N 1 N N N Brunswick Corp/DE YM4O38W15AX4YLLQKU27 117043109 22181.00000000 NS USD 1225278.44000000 1.022964210224 Long EC CORP US N 1 N N N American Financial Group Inc/OH 549300AFOM7IVKIU1G39 025932104 12411.00000000 NS USD 1566392.31000000 1.307754400950 Long EC CORP US N 1 N N N Crane NXT Co 549300EXNPSXEWUD3N21 224441105 21480.00000000 NS USD 1157772.00000000 0.966604227198 Long EC CORP US N 1 N N N Broadstone Net Lease Inc 549300U8D7PT70B49V21 11135E203 42908.00000000 NS USD 688673.40000000 0.574961753781 Long EC US N 1 N N N Kirby Corp I7NO6FZO5GUCG585T325 497266106 11776.00000000 NS USD 1335516.16000000 1.114999814944 Long EC CORP US N 1 N N N Fixed Income Clearing Corp 549300H47WTHXPU08X20 000000000 987049.16000000 PA USD 987049.16000000 0.824070620561 Long RA CORP US N 2 Repurchase N 2.75000000 2025-07-01 988400.00000000 USD 1006790.14000000 USD UST N N N First Citizens BancShares Inc/NC 549300N3Z00ZHE2XC526 31946M103 773.00000000 NS USD 1512351.31000000 1.262636485642 Long EC CORP US N 1 N N N Cracker Barrel Old Country Store Inc 8P4PHQIUWPIECBFBW745 22410J106 11913.00000000 NS USD 727646.04000000 0.607499350622 Long EC CORP US N 1 N N N First Advantage Corp 549300RNJ0PXU8FP7D06 31846B108 65094.00000000 NS USD 1081211.34000000 0.902685029297 Long EC CORP US N 1 N N N First Industrial Realty Trust Inc N/A 32054K103 18299.00000000 NS USD 880730.87000000 0.735307281542 Long EC US N 1 N N N ICON PLC 6354008SRQGEMC4XFI67 000000000 10032.00000000 NS USD 1459154.40000000 1.218223286774 Long EC CORP IE N 1 N N N IPG Photonics Corp 5493002KZ51CADQ94G15 44980X109 17820.00000000 NS USD 1223343.00000000 1.021348344159 Long EC CORP US N 1 N N N Cameco Corp N4BHALMXL3GMZKCUON55 13321L108 10808.00000000 NS USD 802277.84000000 0.669808175989 Long EC CORP CA N 1 N N N WD-40 Co 549300UZHTN0CNKBOB19 929236107 5649.00000000 NS USD 1288480.41000000 1.075730464175 Long EC CORP US N 1 N N N Crocs Inc 549300B0J6YCXD63OG72 227046109 15423.00000000 NS USD 1562041.44000000 1.304121933302 Long EC CORP US N 1 N N N Northern Oil & Gas Inc OKFF0PIZDDMNH4UCYE51 665531307 37090.00000000 NS USD 1051501.50000000 0.877880787241 Long EC CORP US N 1 N N N BorgWarner Inc 549300DSFX2IE88NSX47 099724106 45901.00000000 NS USD 1536765.48000000 1.283019462537 Long EC CORP US N 1 N N N AutoNation Inc N/A 05329W102 7110.00000000 NS USD 1412401.50000000 1.179190082677 Long EC CORP US N 1 N N N Lumentum Holdings Inc 549300JLWRRC38DWEF52 55024U109 13459.00000000 NS USD 1279412.54000000 1.068159853144 Long EC CORP US N 1 N N N TXNM Energy Inc 5493003JOBJGLZSDDQ28 69349H107 37138.00000000 NS USD 2091612.16000000 1.746251555156 Long EC CORP US N 1 N N N Criteo SA 969500EELFB4RDMFHA76 226718104 42551.00000000 NS USD 1019521.96000000 0.851181611109 Long EC CORP FR N 1 N N N FormFactor Inc 549300YCEEO6SZD1ZR61 346375108 24993.00000000 NS USD 860009.13000000 0.718007051895 Long EC CORP US N 1 N N N Envista Holdings Corp 549300BX623VURJZ5269 29415F104 74560.00000000 NS USD 1456902.40000000 1.216343130129 Long EC CORP US N 1 N N N Star Bulk Carriers Corp 549300SO3FMK7H6DDY54 000000000 45418.00000000 NS USD 783460.50000000 0.654097897637 Long EC CORP MH N 1 N N N HF Sinclair Corp 2549009G116AM01XHN24 403949100 13276.00000000 NS USD 545378.08000000 0.455326918900 Long EC CORP US N 1 N N N F5 Inc 54930015FPK9KT966303 315616102 4098.00000000 NS USD 1206123.36000000 1.006971958467 Long EC CORP US N 1 N N N Avnet Inc XJI53DCPL7QABOWK4Z75 053807103 20831.00000000 NS USD 1105709.48000000 0.923138111322 Long EC CORP US N 1 N N N ONE Gas Inc 549300HXDWI0LATTX840 68235P108 17141.00000000 NS USD 1231752.26000000 1.028369092859 Long EC CORP US N 1 N N N Bath & Body Works Inc GR3KVMWVCR54YWQNXU90 070830104 55450.00000000 NS USD 1661282.00000000 1.386976195459 Long EC CORP US N 1 N N N ArcBest Corp 5493006S3KBNE8ZS3J23 03937C105 17790.00000000 NS USD 1370007.90000000 1.143796384293 Long EC CORP US N 1 N N N Federated Hermes Inc R05X5UQ874RGFF7HHD84 314211103 36428.00000000 NS USD 1614488.96000000 1.347909479156 Long EC CORP US N 1 N N N Magnolia Oil & Gas Corp N/A 559663109 54465.00000000 NS USD 1224373.20000000 1.022208440685 Long EC CORP US N 1 N N ACI Worldwide Inc 5493003BPVMZUJ6F5C02 004498101 25912.00000000 NS USD 1189619.92000000 0.993193516022 Long EC CORP US N 1 N N N Texas Capital Bancshares Inc 549300466Q2SXRX0YM48 88224Q107 12623.00000000 NS USD 1002266.20000000 0.836775069442 Long EC CORP US N 1 N N N Tenet Healthcare Corp 0W9AIBT6U6ADJ2I8HK17 88033G407 10488.00000000 NS USD 1845888.00000000 1.541100617164 Long EC CORP US N 1 N N N IDACORP Inc N134NUJDWN8UEFA8B673 451107106 16113.00000000 NS USD 1860245.85000000 1.553087742870 Long EC CORP US N 1 N N N HA Sustainable Infrastructure Capital Inc 254900ZZRL7MWL1X8E92 41068X100 43997.00000000 NS USD 1181759.42000000 0.986630917748 Long EC CORP US N 1 N N N ON Semiconductor Corp ZV20P4CNJVT8V1ZGJ064 682189105 23322.00000000 NS USD 1222306.02000000 1.020482587126 Long EC CORP US N 1 N N N ADT Inc N/A 00090Q103 191985.00000000 NS USD 1626112.95000000 1.357614151467 Long EC CORP US N 1 N N N Webster Financial Corp KMRURHT0VWKYS6Z5KU67 947890109 18197.00000000 NS USD 993556.20000000 0.829503238011 Long EC CORP US N 1 N N N CACI International Inc SYRPI2D1O9WRTS2WX210 127190304 3579.00000000 NS USD 1706109.30000000 1.424401748740 Long EC CORP US N 1 N N N Matador Resources Co 549300CI3Q2UUK5R4G79 576485205 27877.00000000 NS USD 1330290.44000000 1.110636949853 Long EC CORP US N 1 N N N RPM International Inc 549300TJCKW4BRXPJ474 749685103 15189.00000000 NS USD 1668359.76000000 1.392885297368 Long EC CORP US N 1 N N N NCR Atleos Corp 9845005FC3S0VA714741 63001N106 56742.00000000 NS USD 1618849.26000000 1.351549819751 Long EC CORP US N 1 N N N Cboe Global Markets Inc 529900RLNSGA90UPEH54 12503M108 7069.00000000 NS USD 1648561.49000000 1.376356057178 Long EC CORP US N 1 N N N Integer Holdings Corp 549300SUD2ED5XG6X569 45826H109 13212.00000000 NS USD 1624679.64000000 1.356417505232 Long EC CORP US N 1 N N N JBT Marel Corp 5493007CT6ATBZ2L6826 477839104 11978.00000000 NS USD 1440474.28000000 1.202627571075 Long EC CORP US N 1 N N N STAG Industrial Inc 549300QWYX2W6FASVQ07 85254J102 36568.00000000 NS USD 1326687.04000000 1.107628532244 Long EC US N 1 N N N Commvault Systems Inc 65T5VRP62VXG39YFML83 204166102 4516.00000000 NS USD 787274.28000000 0.657281957944 Long EC CORP US N 1 N N N Hexcel Corp S6Q7LW43WUBUHXY2QP69 428291108 19378.00000000 NS USD 1094663.22000000 0.913915775999 Long EC CORP US N 1 N N N O-I Glass Inc N/A 67098H104 74583.00000000 NS USD 1099353.42000000 0.917831544516 Long EC CORP US N 1 N N N Encompass Health Corp 549300FVRPM9DRQZRG64 29261A100 17649.00000000 NS USD 2164296.87000000 1.806934788071 Long EC CORP US N 1 N N N Independent Bank Corp 549300C5K3W8THR3GE10 453836108 18050.00000000 NS USD 1135074.25000000 0.947654260281 Long EC CORP US N 1 N N N CH Robinson Worldwide Inc 529900WNWN5L0OVDHA79 12541W209 13954.00000000 NS USD 1338886.30000000 1.117813487732 Long EC CORP US N 1 N N N Hanover Insurance Group Inc/The JJYR6MFKFF6CF8DBZ078 410867105 10940.00000000 NS USD 1858377.80000000 1.551528139575 Long EC CORP US N 1 N N N 2025-07-28 MML SERIES INVESTMENT FUND Renee Hitchcock Renee Hitchcock CFO and Treasurer