INV OPP DIS MID CAP GROWT SI

NPORT-P false 0000067160 XXXXXXXX S000018542 C000051438 C000067781 MML SERIES INVESTMENT FUND 811-02224 0000067160 VQ1HG47DNRJG3HBJH467 100 BRIGHT MEADOW BLVD. ENFIELD 06082-1981 8605621000 MML Growth Allocation Fund S000018542 549300OHEZTGTW6ANP74 2020-12-31 2020-03-31 N 1222651450.97 1145893.68 1221505557.29 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N INVESCO OPPENHEIMER VI DISCOVE 549300UVBOIFRDMXQ155 INV OPP DIS MID CAP GROWT SI 00900X751 108984.189 NS USD 7606006.55 0.6226747398 Long EC RF US N 1 N N N INVESCO OPPENHEIMER VI GLOBAL 54930087GU0ETZ1LHG81 INV OPP GLOBAL FD/VA SI 00900X504 625073.178 NS USD 20783683.17 1.7014808525 Long EC RF US N 1 N N N INVESCO OPPENHEIMER VI GLOBAL 549300NCC31DI84NL880 INV OPP GB STR INC FD/VA SI 00900X884 3252412.246 NS USD 13497510.82 1.1049897186 Long EC RF US N 1 N N N INVESCO OPPENHEIMER VI INTERNA 5493008MREBGKTF7VG26 INV OPP INTL GROW SI 00900X843 3378783.891 NS USD 6622416.43 0.542151969 Long EC RF US N 1 N N N INVESCO OPPENHEIMER VI MAIN ST 549300EYSBUJ511UGD39 INV OPP MAIN ST FUND VA SI 00900X827 723831.464 NS USD 16966609.52 1.3889915947 Long EC RF US N 1 N N N MML BLUE CHIP GROWTH FD VQ1HG47DNRJG3HBJH467 MUTUAL FUND 553097742 4772662.027 NS USD 68344520.23 5.5951051407 Long EC RF US N 1 N N N MML DYNAMIC BOND FUND 54930080JS98DQHKPB49 DYNAMIC BD FD CL II 55312G689 6047142.648 NS USD 58475869.41 4.7871963464 Long EC RF US N 1 N N N MML EQUITY INCOME FD 549300NLQECK0VBFCG40 MUTUAL FUND 553097775 8063989.134 NS USD 64511913.07 5.2813442137 Long EC RF US N 1 N N N MML FOCUSED EQUITY FUND 549300SLRZRGITT1HD33 MUTUAL FUND 553097197 16005742.478 NS USD 90592502.43 7.4164625686 Long EC RF US N 1 N N N MML FOREIGN FD VQ1HG47DNRJG3HBJH467 MUTUAL FUND 553097650 6315310.299 NS USD 46606990.01 3.8155364691 Long EC RF US N 1 N N N MML FUNDAMENTAL GROWTH FUND 5493004SX3XV4PR5XZ31 MUTUAL FUND 553097171 3888687.233 NS USD 32703859.63 2.6773402245 Long EC RF US N 1 N N N MML FUNDAMENTAL VALUE FUND 549300C6NIUE0KC40C89 MUTUAL FUND 553097213 6189217.019 NS USD 57745394.79 4.727395176 Long EC RF US N 1 N N N MML GLOBAL FD VQ1HG47DNRJG3HBJH467 MUTUAL FUND 553097668 11901446.224 NS USD 119490520.09 9.7822330301 Long EC RF US N 1 N N N MML HIGH YIELD FUND 54930080JS98DQHKPB49 MUTUAL FUND 55312G739 2164644.572 NS USD 18074782.18 1.4797134628 Long EC RF US N 1 N N N MML INCOME AND GROWTH FD UQWC7R69CJ01IKYBPI08 MUTUAL FUND 553097767 8720910.728 NS USD 60261493.13 4.9333785483 Long EC RF US N 1 N N N MML INFLATION PROTECTED BD FD 54930080JS98DQHKPB49 MUTUAL FUND 55312G200 4937541.097 NS USD 50017291.31 4.0947248264 Long EC RF US N 1 N N N MML INTERNATIONAL EQUITY FUND 549300H6NY8A0TMQJW78 MUTUAL FUND 553097155 7699269.478 NS USD 48967353.88 4.0087704544 Long EC RF US N 1 N N N MML LARGE CAP GROWTH FD 5493005JIDUT7TI47C17 MUTUAL FUND 553097734 2664461.561 NS USD 26165012.53 2.1420297578 Long EC RF US N 1 N N N MML MANAGED BOND FUND P1YXM1SSOECE52ITGE86 MUTUAL FUND 55312G309 8126804.27 NS USD 98504474.44 8.0641855333 Long EC RF US N 1 N N N MML MID CAP GROWTH FD VQ1HG47DNRJG3HBJH467 MUTUAL FUND 553097692 5757929.007 NS USD 70477051.05 5.7696873035 Long EC RF US N 1 N N N MML MID CAP VALUE FD VQ1HG47DNRJG3HBJH467 MUTUAL FUND 553097718 7719049.823 NS USD 59282302.64 4.8532159585 Long EC RF US N 1 N N N MML SER INVT FD VQ1HG47DNRJG3HBJH467 MML EQUITY INDEX FD 553097833 154411.337 NS USD 4019327.1 0.3290469762 Long EC RF US N 1 N N N MML SHORT DURATION BOND FUND 54930080JS98DQHKPB49 MUTUAL FUND 55312G754 4183970.741 NS USD 37697576.38 3.0861567641 Long EC RF US N 1 N N N MML SMALL CAP GROWTH EQUITY FD HQ4SSOSDU7DRRXL6HW28 MUTUAL FUND 553097205 1028147.509 NS USD 10364645.03 0.8485139481 Long EC RF US N 1 N N N MML SMALL COMPANY VALUE FUND VQ1HG47DNRJG3HBJH467 MUTUAL FUND 553097262 2010320.833 NS USD 20505272.5 1.6786884331 Long EC RF US N 1 N N N MML SMALL/MID CAP VALUE VQ1HG47DNRJG3HBJH467 MUTUAL FUND 553097684 2170530.055 NS USD 15345647.49 1.2562896172 Long EC RF US N 1 N N N MML STRG EMERGING MARKETS FUND 54930080JS98DQHKPB49 MUTUAL FUND 55312G770 4369860.467 NS USD 42693536.76 3.4951569811 Long EC RF US N 1 N N N MML TOTAL RETURN BOND FUND VQ1HG47DNRJG3HBJH467 MUTUAL FUND 553097221 5138182.69 NS USD 56108954.97 4.5934260909 Long EC RF US N 1 N N N 2020-05-20 MML SERIES INVESTMENT FUND /s/ Renee Hitchcock Renee Hitchcock Treasurer and CFO XXXX