N-MFP3 0000742212 XXXXXXXX 2025-05-31 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 49 111 424676202.30 433263418.60 0.8100 0.8300 2025-05-01 425205162.48 433793570.18 0.8100 0.8300 2025-05-02 427535316.29 436126848.76 0.8100 0.8200 2025-05-05 413940627.39 422533194.02 0.8000 0.8200 2025-05-06 430022243.87 438615487.77 0.8100 0.8300 2025-05-07 428895718.51 437490264.95 0.8100 0.8200 2025-05-08 426092215.78 434687785.10 0.8000 0.8200 2025-05-09 425459658.27 434058210.15 0.8000 0.8200 2025-05-12 410361728.56 421081662.76 0.8000 0.8200 2025-05-13 414598793.08 425119423.19 0.8000 0.8200 2025-05-14 407273187.29 418595879.72 0.8000 0.8200 2025-05-15 407042927.08 417865354.49 0.8000 0.8200 2025-05-16 415187503.33 427318156.24 0.8000 0.8300 2025-05-19 413250061.64 424981753.04 0.8000 0.8300 2025-05-20 421288282.56 432720919.66 0.8100 0.8300 2025-05-21 414010450.79 425444033.71 0.8000 0.8300 2025-05-22 418036689.93 426246187.31 0.8100 0.8300 2025-05-23 416656270.39 419940042.69 0.8200 0.8200 2025-05-27 418775364.66 422059613.82 0.8200 0.8200 2025-05-28 416192738.75 419477347.15 0.8200 0.8200 2025-05-29 416626832.50 419911825.78 0.8200 0.8200 2025-05-30 442822.08 508900690.16 508851325.72 2068861.36 5095632.89 506267376.27 506275481.7710 Y 1.0000 0.0438 2025-05-01 0.0439 2025-05-02 0.0440 2025-05-05 0.0439 2025-05-06 0.0439 2025-05-07 0.0438 2025-05-08 0.0438 2025-05-09 0.0436 2025-05-12 0.0436 2025-05-13 0.0436 2025-05-14 0.0436 2025-05-15 0.0436 2025-05-16 0.0436 2025-05-19 0.0436 2025-05-20 0.0435 2025-05-21 0.0435 2025-05-22 0.0434 2025-05-23 0.0434 2025-05-27 0.0435 2025-05-28 0.0435 2025-05-29 0.0436 2025-05-30 1.0001 2025-05-01 1.0001 2025-05-02 1.0001 2025-05-05 1.0001 2025-05-06 1.0001 2025-05-07 1.0001 2025-05-08 1.0001 2025-05-09 1.0000 2025-05-12 1.0000 2025-05-13 1.0000 2025-05-14 1.0000 2025-05-15 1.0001 2025-05-16 1.0000 2025-05-19 1.0000 2025-05-20 1.0000 2025-05-21 1.0000 2025-05-22 1.0001 2025-05-23 1.0000 2025-05-27 1.0000 2025-05-28 1.0000 2025-05-29 1.0001 2025-05-30 N N Underlying Fund C000000083 0.01 506267376.27 506275481.7710 1.0001 2025-05-01 1.0001 2025-05-02 1.0001 2025-05-05 1.0001 2025-05-06 1.0001 2025-05-07 1.0001 2025-05-08 1.0001 2025-05-09 1.0000 2025-05-12 1.0000 2025-05-13 1.0000 2025-05-14 1.0000 2025-05-15 1.0001 2025-05-16 1.0000 2025-05-19 1.0000 2025-05-20 1.0000 2025-05-21 1.0000 2025-05-22 1.0001 2025-05-23 1.0000 2025-05-27 1.0000 2025-05-28 1.0000 2025-05-29 1.0001 2025-05-30 1474415.07 1444793.05 2025-05-01 922928.51 1848479.58 2025-05-02 890633.42 550205.06 2025-05-05 1197639.42 698053.78 2025-05-06 1390201.39 1179775.62 2025-05-07 718468.88 1649956.17 2025-05-08 1351398.03 804113.35 2025-05-09 988850.38 4124164.04 2025-05-12 1186202.18 319154.16 2025-05-13 1929379.29 4676875.25 2025-05-14 929086.27 1662695.69 2025-05-15 690671.01 546089.91 2025-05-16 1908036.20 998705.49 2025-05-19 2122874.35 997446.31 2025-05-20 1396903.13 2651436.47 2025-05-21 1393950.74 623077.00 2025-05-22 455077.82 2718070.03 2025-05-23 588100.59 1802650.96 2025-05-27 904360.63 1374157.52 2025-05-28 648500.46 1229747.21 2025-05-29 1434420.66 75584.40 2025-05-30 24522098.43 31975231.05 0.0405 2025-05-01 0.0406 2025-05-02 0.0407 2025-05-05 0.0406 2025-05-06 0.0406 2025-05-07 0.0405 2025-05-08 0.0405 2025-05-09 0.0403 2025-05-12 0.0403 2025-05-13 0.0403 2025-05-14 0.0403 2025-05-15 0.0403 2025-05-16 0.0403 2025-05-19 0.0403 2025-05-20 0.0402 2025-05-21 0.0402 2025-05-22 0.0401 2025-05-23 0.0401 2025-05-27 0.0402 2025-05-28 0.0402 2025-05-29 0.0403 2025-05-30 Y 90.40 Insurance company 1.0000 1.0000 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 196142.19 196142.19 0.0004 N Y Y N Federal Farm Credit Bank Federal Farm Credit Bank 4.470 3133ERQ46 254900C5LP6DN9OP9V83 US3133ERQ466 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2026-12-30 2026-12-30 N N N 0.0447 299985.57 299985.57 0.0006 N N N N US Treasury US Treasury 0.000 912797QV2 254900HROIFWPRGM1V77 US912797QV24 U.S. Treasury Debt Y 2025-09-23 2025-09-23 2025-09-23 N N N 0.0435 6611142.39 6611142.39 0.0131 N Y Y N Tri-Party Mitsubishi UFJ Tri-Party Mitsubishi UFJ 4.360 BYDKSEYQ2 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 BYDKSEYQ2 2028-12-20 2054-09-20 2.000000 - 6.500000 N/A 27017772.00 25499999.98 Agency Mortgage-Backed Securities Y 2025-06-02 2025-06-02 2025-06-02 N N N 0.0436 25000000.00 25000000.00 0.0494 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 0.000 313385LA2 2549001DPIFGXC1TOL40 US313385LA23 U.S. Government Agency Debt (if categorized as no-coupon discount notes) Y 2025-08-29 2025-08-29 2025-08-29 N N N 0.0426 5559908.15 5559908.15 0.0110 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 1361660.57 1361660.57 0.0027 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.335 3130B52Z0 2549001DPIFGXC1TOL40 US3130B52Z02 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-09-12 2025-09-12 N N N 0.0435 2635003.00 2635003.00 0.0052 N N N N Federal Home Loan Bank Federal Home Loan Bank 4.325 3130B53M8 2549001DPIFGXC1TOL40 US3130B53M89 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-07-21 2025-07-21 N N N 0.0381 924989.22 924989.22 0.0018 N N N N US Treasury US Treasury 4.506 91282CLT6 254900HROIFWPRGM1V77 US91282CLT61 U.S. Treasury Debt Y 2025-06-03 2026-10-31 2026-10-31 N N N 0.0451 8562595.78 8562595.78 0.0169 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.345 3130B6E69 2549001DPIFGXC1TOL40 US3130B6E699 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-12-12 2025-12-12 N N N 0.0432 1200005.52 1200005.52 0.0024 N N N N Federal National Mortgage Association Federal National Mortgage Association 4.470 3135G07L1 B1V7KEBTPIMZEU4LTD58 US3135G07L12 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2026-10-23 2026-10-23 N N N 0.0460 1511515.50 1511515.50 0.0030 N N N N US Treasury US Treasury 0.000 912797QU4 254900HROIFWPRGM1V77 US912797QU41 U.S. Treasury Debt Y 2025-09-16 2025-09-16 2025-09-16 N N N 0.0436 3160222.53 3160222.53 0.0062 N Y Y N US Treasury US Treasury 0.000 912797PQ4 254900HROIFWPRGM1V77 US912797PQ48 U.S. Treasury Debt Y 2025-08-28 2025-08-28 2025-08-28 N N N 0.0432 989752.85 989752.85 0.0020 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.340 3130B5YA0 2549001DPIFGXC1TOL40 US3130B5YA00 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-08-11 2025-08-12 N N N 0.0440 500016.73 500016.73 0.0010 N N N N Federal National Mortgage Association Federal National Mortgage Association 4.470 3135G1AB7 B1V7KEBTPIMZEU4LTD58 US3135G1AB74 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2026-12-11 2026-12-11 N N N 0.0463 1901838.45 1901838.45 0.0038 N N N 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 1919319.84 1919319.84 0.0038 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.335 3130B4DB4 2549001DPIFGXC1TOL40 US3130B4DB47 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-06-23 2025-06-23 N N N 0.0433 899989.59 899989.59 0.0018 N N N N Federal National Mortgage Association Federal National Mortgage Association 4.465 3135G07J6 B1V7KEBTPIMZEU4LTD58 US3135G07J65 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2026-08-21 2026-08-21 N N N 0.0455 1451507.83 1451507.83 0.0029 N N N N Tri-Party Bank of Nova Scotia Tri-Party Bank of Nova Scotia 4.340 BYDKSEX42 L3I9ZG2KFGXZ61BMYR72 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 BYDKSEX42 2025-09-30 2034-07-15 0.125000 - 4.875000 N/A 20550240.00 20404217.25 Agency Mortgage-Backed Securities US Treasury 254900HROIFWPRGM1V77 BYDKSEX42 2048-02-15 1.000000 N/A 4426.00 3181.93 U.S. Treasuries (including strips) Y 2025-06-02 2025-06-02 2025-06-02 N N N 0.0434 20000000.00 20000000.00 0.0395 N Y Y N US Treasury US Treasury 0.000 912797PV3 254900HROIFWPRGM1V77 US912797PV33 U.S. Treasury Debt Y 2026-03-19 2026-03-19 2026-03-19 N N N 0.0414 7934656.45 7934656.45 0.0157 N Y Y N US Treasury US Treasury 0.000 912797QP5 254900HROIFWPRGM1V77 US912797QP55 U.S. Treasury Debt Y 2025-11-06 2025-11-06 2025-11-06 N N N 0.0422 1317685.77 1317685.77 0.0026 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.395 3130B5Q84 2549001DPIFGXC1TOL40 US3130B5Q844 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2027-03-25 2027-03-25 N N N 0.0448 1029973.02 1029973.02 0.0020 N N N N US Treasury US Treasury 0.000 912797QA8 254900HROIFWPRGM1V77 US912797QA86 U.S. Treasury Debt Y 2025-07-15 2025-07-15 2025-07-15 N N N 0.0429 994959.44 994959.44 0.0020 N Y Y N Tri-Party Citigroup Global Markets, Inc. Tri-Party Citigroup Global Markets, Inc. 4.340 BYDKSEXT7 MBNUM2BPBDO7JBLYG310 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDKSEXT7 2026-02-28 2036-02-15 0.000000 - 4.625000 N/A 15262152.00 15300132.10 U.S. Treasuries (including strips) Y 2025-06-02 2025-06-02 2025-06-02 N N N 0.0434 15000000.00 15000000.00 0.0296 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.335 3130B4GT2 2549001DPIFGXC1TOL40 US3130B4GT28 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-07-09 2025-07-09 N N N 0.0433 1299979.62 1299979.62 0.0026 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 0.0423 989777.64 989777.64 0.0020 N Y Y N US Treasury US Treasury 4.399 91282CMJ7 254900HROIFWPRGM1V77 US91282CMJ70 U.S. Treasury Debt Y 2025-06-03 2027-01-31 2027-01-31 N N N 0.0440 10403463.51 10403463.51 0.0205 N Y Y N US Treasury US Treasury 0.375 91282CBC4 254900HROIFWPRGM1V77 US91282CBC47 U.S. Treasury Debt Y 2025-12-31 2025-12-31 2025-12-31 N N N 0.0426 1114784.18 1114784.18 0.0022 N Y Y N US Treasury US Treasury 4.483 91282CLA7 254900HROIFWPRGM1V77 US91282CLA70 U.S. Treasury Debt Y 2025-06-03 2026-07-31 2026-07-31 N N N 0.0454 4616107.97 4616107.97 0.0091 N Y Y N US Treasury US Treasury 0.000 912797QT7 254900HROIFWPRGM1V77 US912797QT77 U.S. Treasury Debt Y 2025-09-09 2025-09-09 2025-09-09 N N N 0.0432 15765544.70 15765544.70 0.0311 N Y Y N US Treasury US Treasury 0.000 912797QR1 254900HROIFWPRGM1V77 US912797QR12 U.S. Treasury Debt Y 2025-11-20 2025-11-20 2025-11-20 N N N 0.0429 6023118.72 6023118.72 0.0119 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.330 3130B52Y3 2549001DPIFGXC1TOL40 US3130B52Y37 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-08-14 2025-08-14 N N N 0.0429 3159966.63 3159966.63 0.0062 N N N N US Treasury US Treasury 4.426 91282CHS3 254900HROIFWPRGM1V77 US91282CHS35 U.S. Treasury Debt Y 2025-06-03 2025-07-31 2025-07-31 N N N 0.0444 10741047.58 10741047.58 0.0212 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 0.0426 4971766.26 4971766.26 0.0098 N Y Y N Federal Home Loan Mortgage Corp. Federal Home Loan Mortgage Corp. 0.375 3137EAEX3 S6XOOCT0IEG5ABCC6L87 US3137EAEX33 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-09-23 2025-09-23 2025-09-23 N N N 0.0424 1679452.83 1679452.83 0.0033 N N N N Federal Home Loan Bank Federal Home Loan Bank 4.380 3130B5B72 2549001DPIFGXC1TOL40 US3130B5B721 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-03-23 2026-03-23 2026-03-23 N N N 0.0438 2197320.88 2197320.88 0.0043 N N N N Federal Home Loan Bank Federal Home Loan Bank 4.340 3130B5N87 2549001DPIFGXC1TOL40 US3130B5N874 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-04-17 2026-04-17 2026-04-17 N N N 0.0434 3803022.56 3803022.56 0.0075 N N N N US Treasury US Treasury 0.000 912797QW0 254900HROIFWPRGM1V77 US912797QW07 U.S. Treasury Debt Y 2025-09-30 2025-09-30 2025-09-30 N N N 0.0434 3528902.41 3528902.41 0.0070 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 8959986.97 8959986.97 0.0177 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 5174839.18 5174839.18 0.0102 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.340 3130B62Z8 2549001DPIFGXC1TOL40 US3130B62Z83 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-09-02 2025-09-02 N N N 0.0433 1300010.66 1300010.66 0.0026 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 4.465 3133ERXN6 254900C5LP6DN9OP9V83 US3133ERXN60 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2026-10-15 2026-10-15 N N N 0.0447 4102132.78 4102132.78 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 3895395.11 3895395.11 0.0077 N Y Y N US Treasury US Treasury 1.625 912828R36 254900HROIFWPRGM1V77 US912828R366 U.S. Treasury Debt Y 2026-05-15 2026-05-15 2026-05-15 N N N 0.0404 781200.00 781200.00 0.0015 N Y Y N Tri-Party BNP Paribas Tri-Party BNP Paribas 4.350 BYDKSEXQ3 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 BYDKSEXQ3 2044-08-20 2048-03-20 3.500000 - 4.625000 N/A 587700.00 529851.90 Agency Mortgage-Backed Securities US Treasury 254900HROIFWPRGM1V77 BYDKSEXQ3 2035-10-20 2055-03-20 2.500000 - 6.567000 N/A 9997406.00 9670148.10 U.S. Treasuries (including strips) Y 2025-06-02 2025-06-02 2025-06-02 N N N 0.0435 10000000.00 10000000.00 0.0198 N Y Y N Tri-Party Natixis S.A. Tri-Party Natixis S.A. 4.340 BYDKSEYX7 549300L8G1E7ZHVEOG75 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 BYDKSEYX7 2027-07-31 2052-11-15 0.375000 - 4.125000 N/A 33081338.00 30600026.16 Agency Mortgage-Backed Securities Y 2025-06-02 2025-06-02 2025-06-02 N N N 0.0434 30000000.00 30000000.00 0.0593 N Y Y N Federal National Mortgage Association Federal National Mortgage Association 4.470 3135G1AA9 B1V7KEBTPIMZEU4LTD58 US3135G1AA91 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2026-11-20 2026-11-20 N N N 0.0447 2002060.14 2002060.14 0.0040 N N N N US Treasury US Treasury 0.000 912797PE1 254900HROIFWPRGM1V77 US912797PE18 U.S. Treasury Debt Y 2025-07-17 2025-07-17 2025-07-17 N N N 0.0433 9947220.80 9947220.80 0.0196 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.330 3130B5DQ8 2549001DPIFGXC1TOL40 US3130B5DQ80 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-08-29 2025-08-29 N N N 0.0433 4474995.35 4474995.35 0.0088 N N N N Federal Home Loan Bank Federal Home Loan Bank 4.335 3130B4FY2 2549001DPIFGXC1TOL40 US3130B4FY22 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-07-03 2025-07-03 N N N 0.0433 8989867.49 8989867.49 0.0178 N N N N US Treasury US Treasury 0.000 912797QH3 254900HROIFWPRGM1V77 US912797QH30 U.S. Treasury Debt Y 2025-08-05 2025-08-05 2025-08-05 N N N 0.0432 18360364.78 18360364.78 0.0363 N Y Y N Federal Farm Credit Bank Federal Farm Credit Bank 4.566 3133ERXT3 254900C5LP6DN9OP9V83 US3133ERXT31 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-03 2026-10-16 2026-10-16 N N N 0.0457 2204206.03 2204206.03 0.0044 N N N N US Treasury US Treasury 0.375 91282CBH3 254900HROIFWPRGM1V77 US91282CBH34 U.S. Treasury Debt Y 2026-01-31 2026-01-31 2026-01-31 N N N 0.0424 584771.48 584771.48 0.0012 N Y Y N US Treasury US Treasury 4.451 91282CKM2 254900HROIFWPRGM1V77 US91282CKM28 U.S. Treasury Debt Y 2025-06-03 2026-04-30 2026-04-30 N N N 0.0444 7305410.98 7305410.98 0.0144 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.335 3130B4VH1 2549001DPIFGXC1TOL40 US3130B4VH15 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-08-05 2025-08-05 N N N 0.0433 5729916.06 5729916.06 0.0113 N N N N Federal Home Loan Bank Federal Home Loan Bank 0.000 313385HH2 2549001DPIFGXC1TOL40 US313385HH22 U.S. Government Agency Debt (if categorized as no-coupon discount notes) Y 2025-06-25 2025-06-25 2025-06-25 N N N 0.0425 3284993.28 3284993.28 0.0065 N N Y N Federal Farm Credit Bank Federal Farm Credit Bank 4.430 3133ERHZ7 254900C5LP6DN9OP9V83 US3133ERHZ74 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2026-06-24 2026-06-24 N N N 0.0443 300165.77 300165.77 0.0006 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 4.395 3133ETAU1 254900C5LP6DN9OP9V83 US3133ETAU17 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2027-03-26 2027-03-26 N N N 0.0439 469988.83 469988.83 0.0009 N N N N Federal Home Loan Bank Federal Home Loan Bank 4.340 3130B5Y51 2549001DPIFGXC1TOL40 US3130B5Y517 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-08-12 2025-08-12 N N N 0.0431 800028.62 800028.62 0.0016 N N N N US Treasury US Treasury 4.625 91282CKB6 254900HROIFWPRGM1V77 US91282CKB62 U.S. Treasury Debt Y 2026-02-28 2026-02-28 2026-02-28 N N N 0.0412 401028.12 401028.12 0.0008 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.350 3130B6BV7 2549001DPIFGXC1TOL40 US3130B6BV76 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-06-05 2026-06-05 2026-06-05 N N N 0.0438 1895659.98 1895659.98 0.0037 N N N N Federal Home Loan Bank Federal Home Loan Bank 4.330 3130B5C97 2549001DPIFGXC1TOL40 US3130B5C976 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-08-21 2025-08-21 N N N 0.0428 609996.52 609996.52 0.0012 N N N N Tri-Party Goldman Sachs Group LP Tri-Party Goldman Sachs Group LP 4.350 BYDKSEYF6 FOR8UP27PHTHYVLBNG30 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDKSEYF6 2026-04-01 2054-06-20 4.000000 - 5.500000 N/A 22435722.00 22440857.60 U.S. Treasuries (including strips) Y 2025-06-02 2025-06-02 2025-06-02 N N N 0.0435 22000000.00 22000000.00 0.0435 N Y Y N Federal Farm Credit Bank Federal Farm Credit Bank 4.430 3133ERJN2 254900C5LP6DN9OP9V83 US3133ERJN27 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2026-06-26 2026-06-26 N N N 0.0443 804863.52 804863.52 0.0016 N N N N US Treasury US Treasury 0.000 912797PY7 254900HROIFWPRGM1V77 US912797PY71 U.S. Treasury Debt Y 2025-09-25 2025-09-25 2025-09-25 N N N 0.0423 1816309.23 1816309.23 0.0036 N Y Y N US Treasury US Treasury 0.000 912797QJ9 254900HROIFWPRGM1V77 US912797QJ95 U.S. Treasury Debt Y 2025-08-12 2025-08-12 2025-08-12 N N N 0.0437 9371014.25 9371014.25 0.0185 N Y Y N US Treasury US Treasury 0.875 91282CCJ8 254900HROIFWPRGM1V77 US91282CCJ80 U.S. Treasury Debt Y 2026-06-30 2026-06-30 2026-06-30 N N N 0.0416 231825.00 231825.00 0.0005 N Y Y N Tri-Party Mizuho Securities Tri-Party Mizuho Securities 4.350 BYDKSEYT6 7TK5RJIZDFROZCA6XF66 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDKSEYT6 2030-10-31 4.875000 N/A 24542415.00 25500060.53 U.S. Treasuries (including strips) Y 2025-06-02 2025-06-02 2025-06-02 N N N 0.0435 25000000.00 25000000.00 0.0494 N Y Y N US Treasury US Treasury 0.000 912797MH7 254900HROIFWPRGM1V77 US912797MH75 U.S. Treasury Debt Y 2025-09-04 2025-09-04 2025-09-04 N N N 0.0427 10483158.22 10483158.22 0.0207 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 0.0432 3329588.36 3329588.36 0.0066 N Y Y N Federal Farm Credit Bank Federal Farm Credit Bank 4.380 3133ERBW0 254900C5LP6DN9OP9V83 US3133ERBW08 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-06-20 2025-06-20 N N N 0.0438 205997.90 205997.90 0.0004 N N N N Federal Home Loan Mortgage Corp. Federal Home Loan Mortgage Corp. 4.445 3134HBPD7 S6XOOCT0IEG5ABCC6L87 US3134HBPD74 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2027-05-05 2027-05-05 N N N 0.0453 799984.56 799984.56 0.0016 N N N N Federal Home Loan Bank Federal Home Loan Bank 4.340 3130B63F1 2549001DPIFGXC1TOL40 US3130B63F11 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-08-26 2025-08-26 N N N 0.0432 900003.76 900003.76 0.0018 N N N N US Treasury US Treasury 4.471 91282CJD4 254900HROIFWPRGM1V77 US91282CJD48 U.S. Treasury Debt Y 2025-06-03 2025-10-31 2025-10-31 N N N 0.0449 7134376.25 7134376.25 0.0141 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.335 3130B6AK2 2549001DPIFGXC1TOL40 US3130B6AK21 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-09-03 2025-09-03 N N N 0.0433 700006.49 700006.49 0.0014 N N N N Federal Home Loan Mortgage Corp. Federal Home Loan Mortgage Corp. 4.470 3134HAMW0 S6XOOCT0IEG5ABCC6L87 US3134HAMW00 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2026-09-23 2026-09-23 N N N 0.0462 1300736.65 1300736.65 0.0026 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 4.400 3133ERES6 254900C5LP6DN9OP9V83 US3133ERES68 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-11-17 2025-11-17 N N N 0.0440 800301.65 800301.65 0.0016 N N N N Federal Home Loan Bank Federal Home Loan Bank 4.330 3130B4LJ8 2549001DPIFGXC1TOL40 US3130B4LJ80 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-06-18 2025-06-18 N N N 0.0433 1099991.99 1099991.99 0.0022 N N N N US Treasury US Treasury 0.000 912797QG5 254900HROIFWPRGM1V77 US912797QG56 U.S. Treasury Debt Y 2025-10-23 2025-10-23 2025-10-23 N N N 0.0425 590031.71 590031.71 0.0012 N Y Y N US Treasury US Treasury 0.500 91282CBQ3 254900HROIFWPRGM1V77 US91282CBQ33 U.S. Treasury Debt Y 2026-02-28 2026-02-28 2026-02-28 N N N 0.0411 291826.17 291826.17 0.0006 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.125 3130B6DC7 2549001DPIFGXC1TOL40 US3130B6DC77 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-11-07 2025-11-07 2025-11-07 N N N 0.0430 1199578.34 1199578.34 0.0024 N N N N Federal Home Loan Bank Federal Home Loan Bank 4.430 3130B1TL1 2549001DPIFGXC1TOL40 US3130B1TL16 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2026-06-26 2026-06-26 N N N 0.0443 2229630.78 2229630.78 0.0044 N N N N Tri-Party BNP Paribas Tri-Party BNP Paribas 4.340 BYDKSEXB6 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 BYDKSEXB6 2027-08-15 2051-08-15 0.000000 - 4.375000 N/A 21109274.00 14280060.74 Agency Mortgage-Backed Securities Y 2025-06-02 2025-06-02 2025-06-02 N N N 0.0434 14000000.00 14000000.00 0.0277 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 4.490 3130AWNJ5 2549001DPIFGXC1TOL40 US3130AWNJ50 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2025-07-21 2025-07-21 N N N 0.0449 4330710.68 4330710.68 0.0086 N N N N US Treasury US Treasury 0.000 912797PX9 254900HROIFWPRGM1V77 US912797PX98 U.S. Treasury Debt Y 2025-09-18 2025-09-18 2025-09-18 N N N 0.0424 977487.39 977487.39 0.0019 N Y Y N US Treasury US Treasury 0.000 912797QN0 254900HROIFWPRGM1V77 US912797QN08 U.S. Treasury Debt Y 2026-05-14 2026-05-14 2026-05-14 N N N 0.0411 4097311.69 4097311.69 0.0081 N Y Y N US Treasury US Treasury 4.625 91282CKY6 254900HROIFWPRGM1V77 US91282CKY65 U.S. Treasury Debt Y 2026-06-30 2026-06-30 2026-06-30 N N N 0.0416 1266250.78 1266250.78 0.0025 N Y Y N Tri-Party Bank of Montreal Tri-Party Bank of Montreal 4.340 BYDKSEXX8 NQQ6HPCNCCU6TUTQYE16 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDKSEXX8 2031-11-15 1.375000 N/A 24214899.00 20400083.56 U.S. Treasuries (including strips) Y 2025-06-02 2025-06-02 2025-06-02 N N N 0.0434 20000000.00 20000000.00 0.0395 N Y Y N Tri-Party TD Securities Tri-Party TD Securities 4.350 BYDKSEZ57 SUVUFHICNZMP2WKHG940 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDKSEZ57 2055-01-01 6.000000 N/A 20305109.00 20600000.14 U.S. Treasuries (including strips) Y 2025-06-02 2025-06-02 2025-06-02 N N N 0.0435 20000000.00 20000000.00 0.0395 N Y Y 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 3982161.12 3982161.12 0.0079 N Y Y N Federal Home Loan Bank Federal Home Loan Bank 0.000 313385PY6 2549001DPIFGXC1TOL40 US313385PY62 U.S. Government Agency Debt (if categorized as no-coupon discount notes) Y 2025-12-01 2025-12-01 2025-12-01 N N N 0.0406 3916338.88 3916338.88 0.0077 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 4.465 3133ERP21 254900C5LP6DN9OP9V83 US3133ERP211 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2026-12-23 2026-12-23 N N N 0.0446 399983.39 399983.39 0.0008 N N N N Federal Home Loan Bank Federal Home Loan Bank 4.250 3130B62T2 2549001DPIFGXC1TOL40 US3130B62T24 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-05-22 2026-05-22 2026-05-22 N N N 0.0429 3496203.06 3496203.06 0.0069 N N N N US Treasury US Treasury 0.000 912797QL4 254900HROIFWPRGM1V77 US912797QL42 U.S. Treasury Debt Y 2025-08-26 2025-08-26 2025-08-26 N N N 0.0433 5208468.19 5208468.19 0.0103 N Y Y N Federal National Mortgage Association Federal National Mortgage Association 4.450 3135G07H0 B1V7KEBTPIMZEU4LTD58 US3135G07H00 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2025-06-02 2026-07-29 2026-07-29 N N N 0.0445 4312119.99 4312119.99 0.0085 N N N N Tri-Party Citigroup Global Markets, Inc. Tri-Party Citigroup Global Markets, Inc. 4.350 BYDKSEX83 MBNUM2BPBDO7JBLYG310 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDKSEX83 2036-05-15 2037-05-15 0.000000 - 0.000000 N/A 17733659.00 10199998.98 U.S. Treasuries (including strips) Y 2025-06-02 2025-06-02 2025-06-02 N N N 0.0435 10000000.00 10000000.00 0.0198 N Y Y N US Treasury US Treasury 0.000 912797QM2 254900HROIFWPRGM1V77 US912797QM25 U.S. Treasury Debt Y 2025-09-02 2025-09-02 2025-09-02 N N N 0.0431 9793065.35 9793065.35 0.0193 N Y Y N Northwestern Mutual Series Fund, Inc. 2025-06-05 /s/Linda Wisniewski Linda Wisniewski Controller and Chief Accounting Officer