N-MFP3 0000742212 XXXXXXXX 2024-12-31 Northwestern Mutual Series Fund, Inc. 0000742212 549300T1UBX7MDSNZA55 Government Money Market Portfolio 549300XTQ77FEJGLVS15 S000000048 1 N N 002-89971 Mason Street Advisors, LLC 801-60721 BlackRock Advisors, LLC 801-47710 PricewaterhouseCoopers LLP Milwaukee WI The Northwestern Mutual Life Insurance Company None N N Y Government N N 37 102 437647171.42 451916334.53 0.8400 0.8700 2024-12-02 423344081.09 436830511.29 0.8400 0.8700 2024-12-03 424074914.24 438062575.52 0.8400 0.8700 2024-12-04 422709531.63 436699336.01 0.8400 0.8700 2024-12-05 422272518.43 436264372.59 0.8300 0.8600 2024-12-06 423716923.14 443013679.66 0.8300 0.8700 2024-12-09 425434431.16 444232566.48 0.8300 0.8700 2024-12-10 423513516.44 442313688.65 0.8300 0.8600 2024-12-11 420280993.16 440521765.98 0.8300 0.8700 2024-12-12 421803221.06 439232953.84 0.8400 0.8700 2024-12-13 431452759.87 448888763.72 0.8400 0.8700 2024-12-16 430366589.36 447804936.93 0.8400 0.8700 2024-12-17 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2024-12-05 1.0003 2024-12-06 1.0002 2024-12-09 1.0002 2024-12-10 1.0002 2024-12-11 1.0003 2024-12-12 1.0003 2024-12-13 1.0002 2024-12-16 1.0003 2024-12-17 1.0002 2024-12-18 1.0002 2024-12-19 1.0003 2024-12-20 1.0002 2024-12-23 1.0003 2024-12-24 1.0002 2024-12-26 1.0003 2024-12-27 1.0002 2024-12-30 1.0003 2024-12-31 N N Underlying Fund C000000083 0.01 504732456.78 504730311.1410 1.0002 2024-12-02 1.0002 2024-12-03 1.0002 2024-12-04 1.0002 2024-12-05 1.0003 2024-12-06 1.0002 2024-12-09 1.0002 2024-12-10 1.0002 2024-12-11 1.0003 2024-12-12 1.0003 2024-12-13 1.0002 2024-12-16 1.0003 2024-12-17 1.0002 2024-12-18 1.0002 2024-12-19 1.0003 2024-12-20 1.0002 2024-12-23 1.0003 2024-12-24 1.0002 2024-12-26 1.0003 2024-12-27 1.0002 2024-12-30 1.0003 2024-12-31 1225850.16 2936871.66 2024-12-02 1256146.21 551464.63 2024-12-03 547619.13 1066146.45 2024-12-04 457058.70 943150.67 2024-12-05 1136385.18 854352.29 2024-12-06 2753798.02 1233802.39 2024-12-09 782118.62 2589509.50 2024-12-10 1418389.12 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2025-01-23 N N N 0.0481 1079221.06 1079221.06 0.0021 N Y Y N US Treasury US Treasury 0.375 91282CAZ4 254900HROIFWPRGM1V77 US91282CAZ41 U.S. Treasury Debt Y 2025-11-30 2025-11-30 2025-11-30 N N N 0.0444 193131.67 193131.67 0.0004 N Y Y N US Treasury US Treasury 0.000 912797LX3 254900HROIFWPRGM1V77 US912797LX35 U.S. Treasury Debt Y 2025-01-09 2025-01-09 2025-01-09 N N N 0.0505 5518379.79 5518379.79 0.0109 N Y Y N Federal Farm Credit Bank Federal Farm Credit Bank 4.510 3133ERQ46 254900C5LP6DN9OP9V83 US3133ERQ466 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2026-12-30 2026-12-30 N N N 0.0451 299988.78 299988.78 0.0006 N N N N US Treasury US Treasury 0.000 912797NK9 254900HROIFWPRGM1V77 US912797NK95 U.S. Treasury Debt Y 2025-03-04 2025-03-04 2025-03-04 N N N 0.0456 10028691.78 10028691.78 0.0199 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.370 3130B45A5 2549001DPIFGXC1TOL40 US3130B45A50 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2025-05-20 2025-05-20 N N N 0.0437 1919968.81 1919968.81 0.0038 N N N N US Treasury US Treasury 0.000 912797MS3 254900HROIFWPRGM1V77 US912797MS31 U.S. Treasury Debt Y 2025-10-02 2025-10-02 2025-10-02 N N N 0.0424 1339088.58 1339088.58 0.0027 N Y Y N Tri-Party Goldman Sachs Group LP Tri-Party Goldman Sachs Group LP 4.460 BYDCXX543 FOR8UP27PHTHYVLBNG30 U.S. Government Agency Repurchase Agreement, collateralized only by U.S. Government Agency securities, U.S. Treasuries, and cash Y N N Y Government National Mortgage Association 549300M8ZYFG0OCMTT87 BYDCXX543 2032-03-15 2064-08-20 2.000000 - 7.000000 N/A 20381146.00 20400000.08 Agency Mortgage-Backed Securities Y 2025-01-02 2025-01-02 2025-01-02 N N N 0.0446 20000000.00 20000000.00 0.0396 N Y Y N US Treasury US Treasury 0.000 912797LZ8 254900HROIFWPRGM1V77 US912797LZ82 U.S. Treasury Debt Y 2025-01-30 2025-01-30 2025-01-30 N N N 0.0480 4883878.76 4883878.76 0.0097 N Y Y N US Treasury US Treasury 0.000 912797NJ2 254900HROIFWPRGM1V77 US912797NJ23 U.S. Treasury Debt Y 2025-02-25 2025-02-25 2025-02-25 N N N 0.0457 4471644.92 4471644.92 0.0089 N Y Y N US Treasury US Treasury 0.000 912797NE3 254900HROIFWPRGM1V77 US912797NE36 U.S. Treasury Debt Y 2025-05-08 2025-05-08 2025-05-08 N N N 0.0441 10470914.65 10470914.65 0.0207 N Y Y N Federal Farm Credit Bank Federal Farm Credit Bank 4.540 3133EN6L9 254900C5LP6DN9OP9V83 US3133EN6L97 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2025-01-23 2025-01-23 N N N 0.0454 2685104.02 2685104.02 0.0053 N N N N US Treasury US Treasury 4.481 91282CLT6 254900HROIFWPRGM1V77 US91282CLT61 U.S. Treasury Debt Y 2025-01-07 2026-10-31 2026-10-31 N N N 0.0448 8559084.55 8559084.55 0.0170 N Y Y N US Treasury US Treasury 0.000 912797MZ7 254900HROIFWPRGM1V77 US912797MZ73 U.S. Treasury Debt Y 2025-01-28 2025-01-28 2025-01-28 N N N 0.0457 11255773.46 11255773.46 0.0223 N Y Y N US Treasury US Treasury 0.000 912797PA9 254900HROIFWPRGM1V77 US912797PA95 U.S. Treasury Debt Y 2025-04-22 2025-04-22 2025-04-22 N N N 0.0434 5627116.89 5627116.89 0.0111 N Y Y N Federal National Mortgage Association Federal National Mortgage Association 4.510 3135G07L1 B1V7KEBTPIMZEU4LTD58 US3135G07L12 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2026-10-23 2026-10-23 N N N 0.0493 1509670.73 1509670.73 0.0030 N N N N US Treasury US Treasury 0.000 912797KJ5 254900HROIFWPRGM1V77 US912797KJ59 U.S. Treasury Debt Y 2025-03-20 2025-03-20 2025-03-20 N N N 0.0436 891960.21 891960.21 0.0018 N Y Y N Tri-Party Bank of Nova Scotia Tri-Party Bank of Nova Scotia 4.450 BYDCXX469 L3I9ZG2KFGXZ61BMYR72 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDCXX469 2026-03-31 2031-06-30 0.125000 - 4.625000 N/A 20639837.00 20405101.55 U.S. Treasuries (including strips) Y 2025-01-02 2025-01-02 2025-01-02 N N N 0.0445 20000000.00 20000000.00 0.0396 N Y Y N Federal National Mortgage Association Federal National Mortgage Association 4.510 3135G1AB7 B1V7KEBTPIMZEU4LTD58 US3135G1AB74 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2026-12-11 2026-12-11 N N N 0.0476 1899871.90 1899871.90 0.0038 N N N N US Treasury US Treasury 0.000 912797NF0 254900HROIFWPRGM1V77 US912797NF01 U.S. Treasury Debt Y 2025-02-04 2025-02-04 2025-02-04 N N N 0.0454 3964698.06 3964698.06 0.0079 N Y Y N US Treasury US Treasury 0.000 912797NP8 254900HROIFWPRGM1V77 US912797NP82 U.S. Treasury Debt Y 2025-06-05 2025-06-05 2025-06-05 N N N 0.0446 1886020.19 1886020.19 0.0037 N Y Y N US Treasury US Treasury 0.000 912797NB9 254900HROIFWPRGM1V77 US912797NB96 U.S. Treasury Debt Y 2025-04-10 2025-04-10 2025-04-10 N N N 0.0445 914135.89 914135.89 0.0018 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.395 3130B2V69 2549001DPIFGXC1TOL40 US3130B2V692 U.S. Government Agency Debt (if categorized as coupon-paying 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0.0447 2154794.09 2154794.09 0.0043 N Y Y N Federal Farm Credit Bank Federal Farm Credit Bank 4.510 3133EPZU2 254900C5LP6DN9OP9V83 US3133EPZU20 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2025-05-27 2025-05-27 N N N 0.0451 3226448.77 3226448.77 0.0064 N N N N Federal Home Loan Bank Federal Home Loan Bank 0.000 313385FB7 2549001DPIFGXC1TOL40 US313385FB79 U.S. Government Agency Debt (if categorized as no-coupon discount notes) Y 2025-05-02 2025-05-02 2025-05-02 N N N 0.0439 1676206.61 1676206.61 0.0033 N N N N US Treasury US Treasury 4.250 91282CJS1 254900HROIFWPRGM1V77 US91282CJS17 U.S. Treasury Debt Y 2025-12-31 2025-12-31 2025-12-31 N N N 0.0426 490124.31 490124.31 0.0010 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 0.000 313385BS4 2549001DPIFGXC1TOL40 US313385BS41 U.S. Government Agency Debt (if categorized as no-coupon discount notes) Y 2025-02-10 2025-02-10 2025-02-10 N N N 0.0500 1442035.95 1442035.95 0.0029 N N Y N US Treasury US 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Tri-Party Natixis S.A. 4.450 BYDCXX5X9 549300L8G1E7ZHVEOG75 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDCXX5X9 2025-12-15 2043-08-15 0.750000 - 4.875000 N/A 16238580.00 15300040.06 U.S. Treasuries (including strips) Y 2025-01-02 2025-01-02 2025-01-02 N N N 0.0445 15000000.00 15000000.00 0.0297 N Y Y N US Treasury US Treasury 4.476 91282CGF2 254900HROIFWPRGM1V77 US91282CGF23 U.S. Treasury Debt Y 2025-01-07 2025-01-31 2025-01-31 N N N 0.0448 5000162.20 5000162.20 0.0099 N Y Y N US Treasury US Treasury 0.000 912797ND5 254900HROIFWPRGM1V77 US912797ND52 U.S. Treasury Debt Y 2025-05-01 2025-05-01 2025-05-01 N N N 0.0448 6312038.46 6312038.46 0.0125 N Y Y N US Treasury US Treasury 4.401 91282CHS3 254900HROIFWPRGM1V77 US91282CHS35 U.S. Treasury Debt Y 2025-01-07 2025-07-31 2025-07-31 N N N 0.0441 10742716.47 10742716.47 0.0213 N Y Y N US Treasury US Treasury 0.000 912797NA1 254900HROIFWPRGM1V77 US912797NA14 U.S. Treasury Debt Y 2025-10-30 2025-10-30 2025-10-30 N N N 0.0429 1701149.27 1701149.27 0.0034 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.375 3130B3KK8 2549001DPIFGXC1TOL40 US3130B3KK89 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2025-03-05 2025-03-05 N N N 0.0438 1400074.64 1400074.64 0.0028 N N N N Federal Home Loan Bank Federal Home Loan Bank 4.370 3130B3KJ1 2549001DPIFGXC1TOL40 US3130B3KJ17 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2025-02-03 2025-02-03 N N N 0.0437 1300132.43 1300132.43 0.0026 N N N N US Treasury US Treasury 0.000 912797NC7 254900HROIFWPRGM1V77 US912797NC79 U.S. Treasury Debt Y 2025-04-24 2025-04-24 2025-04-24 N N N 0.0450 789653.25 789653.25 0.0016 N Y Y N US Treasury US Treasury 0.000 912797NV5 254900HROIFWPRGM1V77 US912797NV50 U.S. Treasury Debt Y 2025-06-20 2025-06-20 2025-06-20 N N N 0.0431 9001367.72 9001367.72 0.0178 N Y Y N US Treasury US Treasury 0.000 912797NU7 254900HROIFWPRGM1V77 US912797NU77 U.S. Treasury Debt Y 2025-12-26 2025-12-26 2025-12-26 N N N 0.0426 5090623.87 5090623.87 0.0101 N Y Y N Tri-Party Citigroup Global Markets, Inc. Tri-Party Citigroup Global Markets, Inc. 4.460 BYDCXX4P7 MBNUM2BPBDO7JBLYG310 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDCXX4P7 2025-03-31 0.500000 N/A 10296619.00 10200026.12 U.S. Treasuries (including strips) Y 2025-01-02 2025-01-02 2025-01-02 N N N 0.0446 10000000.00 10000000.00 0.0198 N Y Y N US Treasury US Treasury 0.000 912797KS5 254900HROIFWPRGM1V77 US912797KS58 U.S. Treasury Debt Y 2025-04-17 2025-04-17 2025-04-17 N N N 0.0442 5433258.60 5433258.60 0.0108 N Y Y N Federal Farm Credit Bank Federal Farm Credit Bank 4.505 3133ERXN6 254900C5LP6DN9OP9V83 US3133ERXN60 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2026-10-15 2026-10-15 N N N 0.0451 4100068.43 4100068.43 0.0081 N N N N US Treasury US Treasury 0.000 912797LN5 254900HROIFWPRGM1V77 US912797LN52 U.S. Treasury Debt Y 2025-06-12 2025-06-12 2025-06-12 N N N 0.0435 4514865.55 4514865.55 0.0089 N Y Y N US Treasury US Treasury 0.000 912797LY1 254900HROIFWPRGM1V77 US912797LY18 U.S. Treasury Debt Y 2025-01-16 2025-01-16 2025-01-16 N N N 0.0463 1996705.62 1996705.62 0.0040 N Y Y N Tri-Party Mitsubishi UFJ Tri-Party Mitsubishi UFJ 4.460 BYDCXX5Q4 K5HU16E3LMSVCCJJJ255 U.S. Government Agency Repurchase Agreement, collateralized only by U.S. Government Agency securities, U.S. Treasuries, and cash Y N N Y Government National Mortgage Association 549300M8ZYFG0OCMTT87 BYDCXX5Q4 2029-01-20 2054-11-20 1.500000 - 6.500000 N/A 16298785.00 15470645.48 Agency Mortgage-Backed Securities Federal Home Loan Bank 2549001DPIFGXC1TOL40 BYDCXX5Q4 2031-09-23 1.125000 N/A 1003619.00 849354.50 Agency Mortgage-Backed Securities Y 2025-01-02 2025-01-02 2025-01-02 N N N 0.0446 16000000.00 16000000.00 0.0317 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 0.000 313385BT2 2549001DPIFGXC1TOL40 US313385BT24 U.S. Government Agency Debt (if categorized as no-coupon discount notes) Y 2025-02-11 2025-02-11 2025-02-11 N N N 0.0500 2492667.07 2492667.07 0.0049 N N Y N US Treasury US Treasury 0.001 912797NY9 254900HROIFWPRGM1V77 US912797NY99 U.S. Treasury Debt Y 2025-04-08 2025-04-08 2025-04-08 N N N 0.0443 1161911.53 1161911.53 0.0023 N Y Y N Tri-Party BNP Paribas Tri-Party BNP Paribas 4.450 BYDCXX3Z6 R0MUWSFPU8MPRO8K5P83 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDCXX3Z6 2029-01-15 2046-08-15 0.000000 - 2.500000 N/A 19631577.00 10200000.00 U.S. Treasuries (including strips) Y 2025-01-02 2025-01-02 2025-01-02 N N N 0.0445 10000000.00 10000000.00 0.0198 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 0.000 313385DX1 2549001DPIFGXC1TOL40 US313385DX18 U.S. Government Agency Debt (if categorized as no-coupon discount notes) Y 2025-04-04 2025-04-04 2025-04-04 N N N 0.0443 5262212.99 5262212.99 0.0104 N N N N Federal National Mortgage Association Federal National Mortgage Association 4.510 3135G1AA9 B1V7KEBTPIMZEU4LTD58 US3135G1AA91 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2026-11-20 2026-11-20 N N N 0.0451 2000049.54 2000049.54 0.0040 N N N N US Treasury US Treasury 0.000 912797MX2 254900HROIFWPRGM1V77 US912797MX26 U.S. Treasury Debt Y 2025-01-14 2025-01-14 2025-01-14 N N N 0.0481 8048731.24 8048731.24 0.0159 N Y Y N US Treasury US Treasury 0.000 912797MV6 254900HROIFWPRGM1V77 US912797MV69 U.S. Treasury Debt Y 2025-04-03 2025-04-03 2025-04-03 N N N 0.0437 3421467.61 3421467.61 0.0068 N Y Y N Federal Farm Credit Bank Federal Farm Credit Bank 4.541 3133ERXT3 254900C5LP6DN9OP9V83 US3133ERXT31 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-07 2026-10-16 2026-10-16 N N N 0.0454 2200056.36 2200056.36 0.0044 N N N N US Treasury US Treasury 4.426 91282CKM2 254900HROIFWPRGM1V77 US91282CKM28 U.S. Treasury Debt Y 2025-01-07 2026-04-30 2026-04-30 N N N 0.0442 5800101.50 5800101.50 0.0115 N Y Y N Federal Farm Credit Bank Federal Farm Credit Bank 4.470 3133ERHZ7 254900C5LP6DN9OP9V83 US3133ERHZ74 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2026-06-24 2026-06-24 N N N 0.0447 299934.96 299934.96 0.0006 N N N N US Treasury US Treasury 0.000 912797MK0 254900HROIFWPRGM1V77 US912797MK05 U.S. Treasury Debt Y 2025-02-13 2025-02-13 2025-02-13 N N N 0.0498 2634903.81 2634903.81 0.0052 N Y Y N US Treasury US Treasury 3.875 91282CGU9 254900HROIFWPRGM1V77 US91282CGU99 U.S. Treasury Debt Y 2025-03-31 2025-03-31 2025-03-31 N N N 0.0504 114882.37 114882.37 0.0002 N Y Y N Tri-Party Citigroup Global Markets, Inc. Tri-Party Citigroup Global Markets, Inc. 4.450 BYDCXX4R3 MBNUM2BPBDO7JBLYG310 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDCXX4R3 2030-08-15 0.625000 N/A 18815878.00 15300055.59 U.S. Treasuries (including strips) Y 2025-01-02 2025-01-02 2025-01-02 N N N 0.0445 15000000.00 15000000.00 0.0297 N Y Y N US Treasury US Treasury 0.000 912797MM6 254900HROIFWPRGM1V77 US912797MM60 U.S. Treasury Debt Y 2025-03-06 2025-03-06 2025-03-06 N N N 0.0467 3474368.28 3474368.28 0.0069 N Y Y N Tri-Party TD Securities Tri-Party TD Securities 4.480 BYDCXX659 SUVUFHICNZMP2WKHG940 U.S. Government Agency Repurchase Agreement, collateralized only by U.S. Government Agency securities, U.S. Treasuries, and cash Y N N Y Federal Home Loan Mortgage Corp. S6XOOCT0IEG5ABCC6L87 BYDCXX659 2054-09-01 5.500000 N/A 25011130.00 24720000.18 Agency Mortgage-Backed Securities Y 2025-01-02 2025-01-02 2025-01-02 N N N 0.0448 24000000.00 24000000.00 0.0475 N Y Y N US Treasury US Treasury 0.000 912797NS2 254900HROIFWPRGM1V77 US912797NS22 U.S. Treasury Debt Y 2025-03-25 2025-03-25 2025-03-25 N N N 0.0451 7824808.83 7824808.83 0.0155 N Y Y N US Treasury US Treasury 0.000 912797NZ6 254900HROIFWPRGM1V77 US912797NZ64 U.S. Treasury Debt Y 2025-04-15 2025-04-15 2025-04-15 N N N 0.0435 1472189.81 1472189.81 0.0029 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.375 3130B25V3 2549001DPIFGXC1TOL40 US3130B25V34 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2025-02-27 2025-02-27 N N N 0.0455 1400167.87 1400167.87 0.0028 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 4.470 3133ERJN2 254900C5LP6DN9OP9V83 US3133ERJN27 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2026-06-26 2026-06-26 N N N 0.0447 804827.05 804827.05 0.0016 N N N N US Treasury US Treasury 0.000 912797NR4 254900HROIFWPRGM1V77 US912797NR49 U.S. Treasury Debt Y 2025-03-18 2025-03-18 2025-03-18 N N N 0.0450 5878442.27 5878442.27 0.0116 N Y Y N US Treasury US Treasury 0.000 912797NG8 254900HROIFWPRGM1V77 US912797NG83 U.S. Treasury Debt Y 2025-02-11 2025-02-11 2025-02-11 N N N 0.0452 8112114.17 8112114.17 0.0161 N Y Y N US Treasury US Treasury 1.125 912828ZC7 254900HROIFWPRGM1V77 US912828ZC78 U.S. Treasury Debt Y 2025-02-28 2025-02-28 2025-02-28 N N N 0.0499 114414.98 114414.98 0.0002 N Y Y N US Treasury US Treasury 2.750 9128283Z1 254900HROIFWPRGM1V77 US9128283Z13 U.S. Treasury Debt Y 2025-02-28 2025-02-28 2025-02-28 N N N 0.0503 115708.05 115708.05 0.0002 N Y Y N Tri-Party BNP Paribas Tri-Party BNP Paribas 4.460 BYDCXX436 R0MUWSFPU8MPRO8K5P83 U.S. Government Agency Repurchase Agreement, collateralized only by U.S. Government Agency securities, U.S. Treasuries, and cash Y N N Y Government National Mortgage Association 549300M8ZYFG0OCMTT87 BYDCXX436 2032-11-15 2064-05-20 2.500000 - 6.500000 N/A 15727873.00 15300000.01 Agency Mortgage-Backed Securities Y 2025-01-02 2025-01-02 2025-01-02 N N N 0.0446 15000000.00 15000000.00 0.0297 N Y Y N Tri-Party Mizuho Securities Tri-Party Mizuho Securities 4.460 BYDCXX5S0 7TK5RJIZDFROZCA6XF66 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDCXX5S0 2029-12-31 4.375000 N/A 25494200.00 25500038.17 U.S. Treasuries (including strips) Y 2025-01-02 2025-01-02 2025-01-02 N N N 0.0446 25000000.00 25000000.00 0.0495 N Y Y N US Treasury US Treasury 0.000 912797NL7 254900HROIFWPRGM1V77 US912797NL78 U.S. Treasury Debt Y 2025-11-28 2025-11-28 2025-11-28 N N N 0.0436 1252751.32 1252751.32 0.0025 N Y Y N Federal Farm Credit Bank Federal Farm Credit Bank 4.420 3133ERBW0 254900C5LP6DN9OP9V83 US3133ERBW08 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2025-06-20 2025-06-20 N N N 0.0442 205998.16 205998.16 0.0004 N N N N Federal Home Loan Bank Federal Home Loan Bank 0.000 313385CT1 2549001DPIFGXC1TOL40 US313385CT15 U.S. Government Agency Debt (if categorized as no-coupon discount notes) Y 2025-03-07 2025-03-07 2025-03-07 N N N 0.0439 3373820.00 3373820.00 0.0067 N N N N US Treasury US Treasury 4.446 91282CJD4 254900HROIFWPRGM1V77 US91282CJD48 U.S. Treasury Debt Y 2025-01-07 2025-10-31 2025-10-31 N N N 0.0447 7133360.72 7133360.72 0.0141 N Y Y N Federal Home Loan Mortgage Corp. Federal Home Loan Mortgage Corp. 4.510 3134HAMW0 S6XOOCT0IEG5ABCC6L87 US3134HAMW00 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2026-09-23 2026-09-23 N N N 0.0470 1299972.34 1299972.34 0.0026 N N N N US Treasury US Treasury 0.000 912797MW4 254900HROIFWPRGM1V77 US912797MW43 U.S. Treasury Debt Y 2025-01-07 2025-01-07 2025-01-07 N N N 0.0493 7295850.82 7295850.82 0.0145 N Y Y N Federal Farm Credit Bank Federal Farm Credit Bank 4.440 3133ERES6 254900C5LP6DN9OP9V83 US3133ERES68 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2025-11-17 2025-11-17 N N N 0.0444 800570.45 800570.45 0.0016 N N N N Federal Home Loan Bank Federal Home Loan Bank 4.370 3130B4DA6 2549001DPIFGXC1TOL40 US3130B4DA63 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2025-05-22 2025-05-22 N N N 0.0437 299997.74 299997.74 0.0006 N N N N US Treasury US Treasury 0.000 912797MY0 254900HROIFWPRGM1V77 US912797MY09 U.S. Treasury Debt Y 2025-01-21 2025-01-21 2025-01-21 N N N 0.0480 4689468.20 4689468.20 0.0093 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.470 3130B1TL1 2549001DPIFGXC1TOL40 US3130B1TL16 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2026-06-26 2026-06-26 N N N 0.0447 2229517.36 2229517.36 0.0044 N N N N Federal Home Loan Bank Federal Home Loan Bank 0.000 313385AC0 2549001DPIFGXC1TOL40 US313385AC08 U.S. Government Agency Debt (if categorized as no-coupon discount notes) Y 2025-01-03 2025-01-03 2025-01-03 N N N 0.0483 2998947.51 2998947.51 0.0059 N N Y N Federal Home Loan Bank Federal Home Loan Bank 4.375 3130B1XE2 2549001DPIFGXC1TOL40 US3130B1XE27 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2025-01-13 2025-01-13 N N N 0.0519 4200115.20 4200115.20 0.0083 N N N N Federal Home Loan Bank Federal Home Loan Bank 4.390 3130B2J55 2549001DPIFGXC1TOL40 US3130B2J556 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2025-01-27 2025-01-27 N N N 0.0468 1000040.73 1000040.73 0.0020 N N N N Tri-Party Bank of Montreal Tri-Party Bank of Montreal 4.450 BYDCXX451 NQQ6HPCNCCU6TUTQYE16 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDCXX451 2028-11-15 2052-02-15 2.250000 - 5.250000 N/A 33713136.00 30600087.65 U.S. Treasuries (including strips) Y 2025-01-02 2025-01-02 2025-01-02 N N N 0.0445 30000000.00 30000000.00 0.0594 N Y Y N Federal Farm Credit Bank Federal Farm Credit Bank 5.000 3133ERAF8 254900C5LP6DN9OP9V83 US3133ERAF83 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-04-04 2025-04-04 2025-04-04 N N N 0.0507 659019.43 659019.43 0.0013 N N N N US Treasury US Treasury 0.000 912797MJ3 254900HROIFWPRGM1V77 US912797MJ32 U.S. Treasury Debt Y 2025-02-06 2025-02-06 2025-02-06 N N N 0.0455 642352.02 642352.02 0.0013 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.530 3130AWNJ5 2549001DPIFGXC1TOL40 US3130AWNJ50 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2025-07-21 2025-07-21 N N N 0.0453 4333756.06 4333756.06 0.0086 N N N N US Treasury US Treasury 0.000 912797LW5 254900HROIFWPRGM1V77 US912797LW51 U.S. Treasury Debt Y 2025-07-10 2025-07-10 2025-07-10 N N N 0.0502 3913865.52 3913865.52 0.0078 N Y Y N US Treasury US Treasury 0.000 912797NN3 254900HROIFWPRGM1V77 US912797NN35 U.S. Treasury Debt Y 2025-05-29 2025-05-29 2025-05-29 N N N 0.0450 8454415.86 8454415.86 0.0168 N Y Y N Federal Farm Credit Bank Federal Farm Credit Bank 4.505 3133ERP21 254900C5LP6DN9OP9V83 US3133ERP211 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2026-12-23 2026-12-23 N N N 0.0450 399985.45 399985.45 0.0008 N N N N Federal Home Loan Bank Federal Home Loan Bank 0.000 313385BC9 2549001DPIFGXC1TOL40 US313385BC98 U.S. Government Agency Debt (if categorized as no-coupon discount notes) Y 2025-01-27 2025-01-27 2025-01-27 N N N 0.0485 3697288.83 3697288.83 0.0073 N N Y N Federal National Mortgage Association Federal National Mortgage Association 4.490 3135G07H0 B1V7KEBTPIMZEU4LTD58 US3135G07H00 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-01-02 2026-07-29 2026-07-29 N N N 0.0449 4309433.57 4309433.57 0.0085 N N N N Northwestern Mutual Series Fund, Inc. 2025-01-06 /s/Linda Wisniewski Linda Wisniewski Controller and Chief Accounting Officer