INV OPP DIS MID CAP GROWT SI

NPORT-P false 0000067160 XXXXXXXX S000018541 C000051437 C000067780 MML SERIES INVESTMENT FUND 811-02224 0000067160 VQ1HG47DNRJG3HBJH467 100 BRIGHT MEADOW BLVD. ENFIELD 06082-1981 8605621000 MML Moderate Allocation Fund S000018541 549300K83VW6FJ00TG70 2020-12-31 2020-03-31 N 1720944037.86 7904445.16 1713039592.7 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 112967.795 NS USD 7884022.41 0.4602358547 Long EC RF US N 1 N N N INVESCO OPPENHEIMER VI GLOBAL 54930087GU0ETZ1LHG81 INV OPP GLOBAL FD/VA SI 00900X504 757399.922 NS USD 25183547.41 1.470108894 Long EC RF US N 1 N N N INVESCO OPPENHEIMER VI GLOBAL 549300NCC31DI84NL880 INV OPP GB STR INC FD/VA SI 00900X884 4953333.632 NS USD 20556334.57 1.1999917957 Long EC RF US N 1 N N N INVESCO OPPENHEIMER VI INTERNA 5493008MREBGKTF7VG26 INV OPP INTL GROW SI 00900X843 1710643.572 NS USD 3352861.4 0.1957258556 Long EC RF US N 1 N N N INVESCO OPPENHEIMER VI MAIN ST 549300EYSBUJ511UGD39 INV OPP MAIN ST FUND VA SI 00900X827 722828.561 NS USD 16943101.47 0.9890665424 Long EC RF US N 1 N N N MML BLUE CHIP GROWTH FD VQ1HG47DNRJG3HBJH467 MUTUAL FUND 553097742 5122406.838 NS USD 73352865.92 4.2820298044 Long EC RF US N 1 N N N MML DYNAMIC BOND FUND 54930080JS98DQHKPB49 DYNAMIC BD FD CL II 55312G689 15650803.631 NS USD 151343271.11 8.8347795203 Long EC RF US N 1 N N N MML EQUITY INCOME FD 549300NLQECK0VBFCG40 MUTUAL FUND 553097775 9523146.39 NS USD 76185171.12 4.4473677926 Long EC RF US N 1 N N N MML FOCUSED EQUITY FUND 549300SLRZRGITT1HD33 MUTUAL FUND 553097197 20181308.677 NS USD 114226207.11 6.6680424432 Long EC RF US N 1 N N N MML FOREIGN FD VQ1HG47DNRJG3HBJH467 MUTUAL FUND 553097650 7475198.265 NS USD 55166963.2 3.2204137858 Long EC RF US N 1 N N N MML FUNDAMENTAL GROWTH FUND 5493004SX3XV4PR5XZ31 MUTUAL FUND 553097171 4691702.955 NS USD 39457221.85 2.3033455863 Long EC RF US N 1 N N N MML FUNDAMENTAL VALUE FUND 549300C6NIUE0KC40C89 MUTUAL FUND 553097213 7515519.352 NS USD 70119795.55 4.093296842 Long EC RF US N 1 N N N MML GLOBAL FD VQ1HG47DNRJG3HBJH467 MUTUAL FUND 553097668 14178207.246 NS USD 142349200.75 8.3097437652 Long EC RF US N 1 N N N MML HIGH YIELD FUND 54930080JS98DQHKPB49 MUTUAL FUND 55312G739 3586524.465 NS USD 29947479.28 1.7482070705 Long EC RF US N 1 N N N MML INCOME AND GROWTH FD UQWC7R69CJ01IKYBPI08 MUTUAL FUND 553097767 10814291.137 NS USD 74726751.76 4.3622314439 Long EC RF US N 1 N N N MML INFLATION PROTECTED BD FD 54930080JS98DQHKPB49 MUTUAL FUND 55312G200 4850213.015 NS USD 49132657.84 2.8681565826 Long EC RF US N 1 N N N MML INTERNATIONAL EQUITY FUND 549300H6NY8A0TMQJW78 MUTUAL FUND 553097155 8483625.03 NS USD 53955855.19 3.1497144269 Long EC RF US N 1 N N N MML LARGE CAP GROWTH FD 5493005JIDUT7TI47C17 MUTUAL FUND 553097734 2727476.495 NS USD 26783819.18 1.5635259859 Long EC RF US N 1 N N N MML MANAGED BOND FUND P1YXM1SSOECE52ITGE86 MUTUAL FUND 55312G309 19209302.755 NS USD 232834729.3 13.5919058901 Long EC RF US N 1 N N N MML MID CAP GROWTH FD VQ1HG47DNRJG3HBJH467 MUTUAL FUND 553097692 6616230.545 NS USD 80982661.87 4.7274249944 Long EC RF US N 1 N N N MML MID CAP VALUE FD VQ1HG47DNRJG3HBJH467 MUTUAL FUND 553097718 8528038.804 NS USD 65495338.01 3.8233405865 Long EC RF US N 1 N N N MML SER INVT FD VQ1HG47DNRJG3HBJH467 MML EQUITY INDEX FD 553097833 183993.921 NS USD 4789361.76 0.2795826658 Long EC RF US N 1 N N N MML SHORT DURATION BOND FUND 54930080JS98DQHKPB49 MUTUAL FUND 55312G754 7217138.742 NS USD 65026420.07 3.7959671421 Long EC RF US N 1 N N N MML SMALL CAP GROWTH EQUITY FD HQ4SSOSDU7DRRXL6HW28 MUTUAL FUND 553097205 1084960.453 NS USD 10937370.24 0.6384773759 Long EC RF US N 1 N N N MML SMALL COMPANY VALUE FUND VQ1HG47DNRJG3HBJH467 MUTUAL FUND 553097262 2147017.165 NS USD 21899575.08 1.2784044907 Long EC RF US N 1 N N N MML SMALL/MID CAP VALUE VQ1HG47DNRJG3HBJH467 MUTUAL FUND 553097684 2623646.027 NS USD 18549177.41 1.0828224572 Long EC RF US N 1 N N N MML STRG EMERGING MARKETS FUND 54930080JS98DQHKPB49 MUTUAL FUND 55312G770 4355454.426 NS USD 42552789.74 2.484051736 Long EC RF US N 1 N N N MML TOTAL RETURN BOND FUND VQ1HG47DNRJG3HBJH467 MUTUAL FUND 553097221 12893666.409 NS USD 140798837.19 8.2192401034 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