N-MFP3 0000742212 XXXXXXXX 2025-12-31 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 42 110 438905510.47 442351666.03 0.8400 0.8500 2025-12-01 434103060.27 435809384.65 0.8500 0.8500 2025-12-02 438440967.12 440147460.03 0.8500 0.8500 2025-12-03 430064222.08 431770883.51 0.8400 0.8500 2025-12-04 427231720.43 431079890.33 0.8400 0.8500 2025-12-05 428388963.15 432237902.97 0.8400 0.8500 2025-12-08 422991907.78 428157881.67 0.8400 0.8500 2025-12-09 425858050.23 429467665.14 0.8400 0.8400 2025-12-10 421076507.36 424096322.29 0.8300 0.8400 2025-12-11 422220992.18 425961006.36 0.8300 0.8400 2025-12-12 423688732.50 428247131.08 0.8300 0.8400 2025-12-15 420824735.87 427390691.29 0.8300 0.8400 2025-12-16 422839469.07 429183452.27 0.8300 0.8400 2025-12-17 429343470.10 435183876.36 0.8300 0.8400 2025-12-18 425881388.73 431476950.72 0.8300 0.8400 2025-12-19 434868634.62 441004641.89 0.8300 0.8400 2025-12-22 433656312.32 439293684.53 0.8300 0.8400 2025-12-23 435570068.52 438826356.15 0.8400 0.8400 2025-12-24 418125668.80 421382244.84 0.8300 0.8400 2025-12-26 420337928.85 421855004.69 0.8400 0.8400 2025-12-29 418042514.69 419559731.25 0.8300 0.8300 2025-12-30 414116810.40 415634176.07 0.8200 0.8300 2025-12-31 150361.26 500535893.35 500392969.86 3157335.04 3669139.73 500031526.43 500032393.6310 Y 1.0000 0.0406 2025-12-01 0.0406 2025-12-02 0.0405 2025-12-03 0.0404 2025-12-04 0.0403 2025-12-05 0.0398 2025-12-08 0.0397 2025-12-09 0.0396 2025-12-10 0.0394 2025-12-11 0.0392 2025-12-12 0.0386 2025-12-15 0.0383 2025-12-16 0.0382 2025-12-17 0.0381 2025-12-18 0.0380 2025-12-19 0.0379 2025-12-22 0.0379 2025-12-23 0.0378 2025-12-24 0.0378 2025-12-26 0.0379 2025-12-29 0.0380 2025-12-30 0.0381 2025-12-31 1.0002 2025-12-01 1.0002 2025-12-02 1.0003 2025-12-03 1.0003 2025-12-04 1.0003 2025-12-05 1.0002 2025-12-08 1.0002 2025-12-09 1.0003 2025-12-10 1.0003 2025-12-11 1.0004 2025-12-12 1.0003 2025-12-15 1.0003 2025-12-16 1.0003 2025-12-17 1.0003 2025-12-18 1.0004 2025-12-19 1.0003 2025-12-22 1.0003 2025-12-23 1.0003 2025-12-24 1.0003 2025-12-26 1.0003 2025-12-29 1.0003 2025-12-30 1.0003 2025-12-31 N N Underlying Fund C000000083 0.01 500031526.43 500032393.6310 1.0002 2025-12-01 1.0002 2025-12-02 1.0003 2025-12-03 1.0003 2025-12-04 1.0003 2025-12-05 1.0002 2025-12-08 1.0002 2025-12-09 1.0003 2025-12-10 1.0003 2025-12-11 1.0004 2025-12-12 1.0003 2025-12-15 1.0003 2025-12-16 1.0003 2025-12-17 1.0003 2025-12-18 1.0004 2025-12-19 1.0003 2025-12-22 1.0003 2025-12-23 1.0003 2025-12-24 1.0003 2025-12-26 1.0003 2025-12-29 1.0003 2025-12-30 1.0003 2025-12-31 1446706.20 1742796.20 2025-12-01 1440074.05 146452.57 2025-12-02 3905818.60 511124.50 2025-12-03 897536.37 3478307.75 2025-12-04 2847156.38 2109830.35 2025-12-05 1973193.46 4405797.24 2025-12-08 1202788.40 683892.41 2025-12-09 510582.16 649231.95 2025-12-10 1592367.40 498301.18 2025-12-11 849792.64 981744.55 2025-12-12 2494235.07 2856486.37 2025-12-15 662274.69 551136.31 2025-12-16 1659137.82 1248184.16 2025-12-17 3059671.37 2242018.07 2025-12-18 738142.63 1801340.73 2025-12-19 1249949.20 2221227.22 2025-12-22 896206.28 735436.45 2025-12-23 190468.11 232598.67 2025-12-24 95401.99 14460.29 2025-12-26 1240121.71 3459208.25 2025-12-29 1167848.00 1022725.68 2025-12-30 862881.36 914822.32 2025-12-31 30982353.89 32507123.22 0.0373 2025-12-01 0.0374 2025-12-02 0.0373 2025-12-03 0.0372 2025-12-04 0.0371 2025-12-05 0.0366 2025-12-08 0.0365 2025-12-09 0.0364 2025-12-10 0.0362 2025-12-11 0.0360 2025-12-12 0.0353 2025-12-15 0.0351 2025-12-16 0.0349 2025-12-17 0.0349 2025-12-18 0.0348 2025-12-19 0.0347 2025-12-22 0.0346 2025-12-23 0.0346 2025-12-24 0.0346 2025-12-26 0.0347 2025-12-29 0.0348 2025-12-30 0.0349 2025-12-31 Y 22.99 Insurance company 1.0000 1.0000 N Federal Farm Credit Bank Federal Farm Credit Bank 3.795 3133ETUZ8 254900C5LP6DN9OP9V83 US3133ETUZ83 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-01-27 2027-01-27 N N N 0.0379 443009.59 443009.59 0.0009 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.867 3133ERXT3 254900C5LP6DN9OP9V83 US3133ERXT31 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-06 2026-10-16 2026-10-16 N N N 0.0387 2201122.00 2201122.00 0.0044 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.775 3133ETR33 254900C5LP6DN9OP9V83 US3133ETR338 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-03-05 2027-03-05 N N N 0.0377 4929776.77 4929776.77 0.0099 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.775 3133ETAU1 254900C5LP6DN9OP9V83 US3133ETAU17 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-03-26 2027-03-26 N N N 0.0377 470349.32 470349.32 0.0009 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.810 3133ERHZ7 254900C5LP6DN9OP9V83 US3133ERHZ74 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-06-24 2026-06-24 N N N 0.0381 300370.44 300370.44 0.0006 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.720 3133ET3F2 254900C5LP6DN9OP9V83 US3133ET3F20 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-06-05 2026-06-05 N N N 0.0372 294993.72 294993.72 0.0006 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.785 3133ETNT0 254900C5LP6DN9OP9V83 US3133ETNT07 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-02-01 2027-02-01 N N N 0.0404 1199633.50 1199633.50 0.0024 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.790 3133ET5D5 254900C5LP6DN9OP9V83 US3133ET5D53 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-11-23 2027-11-23 N N N 0.0385 149998.44 149998.44 0.0003 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.755 3133ET5N3 254900C5LP6DN9OP9V83 US3133ET5N36 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-05-24 2027-05-24 N N N 0.0375 629995.21 629995.21 0.0013 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.845 3133ERXN6 254900C5LP6DN9OP9V83 US3133ERXN60 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-10-15 2026-10-15 N N N 0.0385 4107572.25 4107572.25 0.0082 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.750 3133ET4Q7 254900C5LP6DN9OP9V83 US3133ET4Q75 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-02-16 2027-02-16 N N N 0.0375 4114217.53 4114217.53 0.0082 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.755 3133ET5A1 254900C5LP6DN9OP9V83 US3133ET5A15 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-04-19 2027-04-19 N N N 0.0377 209998.54 209998.54 0.0004 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.810 3133ERJN2 254900C5LP6DN9OP9V83 US3133ERJN27 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-06-26 2026-06-26 N N N 0.0381 805310.69 805310.69 0.0016 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.755 3133ETR66 254900C5LP6DN9OP9V83 US3133ETR668 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-11-06 2026-11-06 N N N 0.0375 904952.65 904952.65 0.0018 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.750 3133ETJ57 254900C5LP6DN9OP9V83 US3133ETJ574 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-10-20 2026-10-20 N N N 0.0375 3099696.88 3099696.88 0.0062 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.850 3133ERQ46 254900C5LP6DN9OP9V83 US3133ERQ466 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-12-30 2026-12-30 N N N 0.0385 300174.29 300174.29 0.0006 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.820 3133ETX69 254900C5LP6DN9OP9V83 US3133ETX690 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-11-19 2027-11-19 N N N 0.0382 455215.68 455215.68 0.0009 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.745 3133ETX28 254900C5LP6DN9OP9V83 US3133ETX286 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-11-19 2026-11-19 N N N 0.0392 181993.40 181993.40 0.0004 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.840 3133ETL21 254900C5LP6DN9OP9V83 US3133ETL216 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-10-22 2027-10-22 N N N 0.0421 256133.75 256133.75 0.0005 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.750 3133ETY35 254900C5LP6DN9OP9V83 US3133ETY359 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-01-20 2027-01-20 N N N 0.0375 1344960.44 1344960.44 0.0027 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.845 3133ERP21 254900C5LP6DN9OP9V83 US3133ERP211 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-12-23 2026-12-23 N N N 0.0385 400225.76 400225.76 0.0008 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.730 3133ETVF1 254900C5LP6DN9OP9V83 US3133ETVF11 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-02-27 2026-02-27 N N N 0.0373 2099955.21 2099955.21 0.0042 N N N N Federal Farm Credit Bank Federal Farm Credit Bank 3.755 3133ET4C8 254900C5LP6DN9OP9V83 US3133ET4C89 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-03-15 2027-03-15 N N N 0.0375 715277.10 715277.10 0.0014 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.810 3130B1TL1 2549001DPIFGXC1TOL40 US3130B1TL16 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-06-26 2026-06-26 N N N 0.0381 2230853.87 2230853.87 0.0045 N N N N Federal Home Loan Bank Federal Home Loan Bank 0.000 313385UD6 2549001DPIFGXC1TOL40 US313385UD60 U.S. Government Agency Debt (if categorized as no-coupon discount notes) Y 2026-03-12 2026-03-12 2026-03-12 N N N 0.0360 3525355.12 3525355.12 0.0071 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.810 3130B7TB0 2549001DPIFGXC1TOL40 US3130B7TB04 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-03-18 2027-03-18 N N N 0.0388 1274998.04 1274998.04 0.0025 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.720 3130B8Q88 2549001DPIFGXC1TOL40 US3130B8Q889 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-08-24 2026-08-24 N N N 0.0485 574983.54 574983.54 0.0011 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.715 3130B8PK2 2549001DPIFGXC1TOL40 US3130B8PK22 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-07-21 2026-07-21 N N N 0.0371 1149984.60 1149984.60 0.0023 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.805 3130B7KF0 2549001DPIFGXC1TOL40 US3130B7KF09 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-02-25 2027-02-25 N N N 0.0381 1194806.86 1194806.86 0.0024 N N N N Federal Home Loan Bank Federal Home Loan Bank 0.000 313385SQ0 2549001DPIFGXC1TOL40 US313385SQ02 U.S. Government Agency Debt (if categorized as no-coupon discount notes) Y 2026-02-03 2026-02-03 2026-02-03 N N N 0.0402 943847.27 943847.27 0.0019 N N Y N Federal Home Loan Bank Federal Home Loan Bank 3.715 3130B8QF2 2549001DPIFGXC1TOL40 US3130B8QF28 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-07-24 2026-07-24 N N N 0.0385 1149984.38 1149984.38 0.0023 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.720 3130B8A51 2549001DPIFGXC1TOL40 US3130B8A511 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-05-20 2026-05-20 N N N 0.0372 499987.82 499987.82 0.0010 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.710 3130B8PH9 2549001DPIFGXC1TOL40 US3130B8PH92 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-06-22 2026-06-22 N N N 0.0371 574991.71 574991.71 0.0011 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.715 3130B7ZT4 2549001DPIFGXC1TOL40 US3130B7ZT48 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-04-07 2026-04-07 N N N 0.0401 1199982.48 1199982.48 0.0024 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.710 3130B6YX8 2549001DPIFGXC1TOL40 US3130B6YX85 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-01-13 2026-01-13 N N N 0.0371 2349983.50 2349983.50 0.0047 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.715 3130B8S94 2549001DPIFGXC1TOL40 US3130B8S943 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-05-05 2026-05-05 N N N 0.0377 1134985.05 1134985.05 0.0023 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.710 3130B8QE5 2549001DPIFGXC1TOL40 US3130B8QE52 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-06-25 2026-06-25 N N N 0.0373 574993.44 574993.44 0.0011 N N N N Federal Home Loan Bank Federal Home Loan Bank 0.000 313385VR4 2549001DPIFGXC1TOL40 US313385VR48 U.S. Government Agency Debt (if categorized as no-coupon discount notes) Y 2026-04-17 2026-04-17 2026-04-17 N N N 0.0359 4343809.87 4343809.87 0.0087 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.710 3130B87K2 2549001DPIFGXC1TOL40 US3130B87K24 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-03-20 2026-03-20 N N N 0.0371 499993.91 499993.91 0.0010 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.720 3130B8NY4 2549001DPIFGXC1TOL40 US3130B8NY44 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-08-19 2026-08-19 N N N 0.0378 574983.94 574983.94 0.0011 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.8 3130B8F64 2549001DPIFGXC1TOL40 US3130B8F643 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-06-04 2026-06-04 N N N 0.0381 1199971.72 1199971.72 0.0024 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.730 3130B8ME9 2549001DPIFGXC1TOL40 US3130B8ME98 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-07-17 2026-07-17 N N N 0.0389 1139985.07 1139985.07 0.0023 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.740 3130B7J21 2549001DPIFGXC1TOL40 US3130B7J217 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-04-17 2026-04-17 N N N 0.0374 1200052.79 1200052.79 0.0024 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.92 3130B7XL3 2549001DPIFGXC1TOL40 US3130B7XL30 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-04-02 2027-04-02 N N N 0.0432 870038.77 870038.77 0.0017 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.725 3130B8M74 2549001DPIFGXC1TOL40 US3130B8M748 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-06-18 2026-06-18 N N N 0.0370 1139983.47 1139983.47 0.0023 N N N N Federal Home Loan Bank Federal Home Loan Bank 0.000 313385TA4 2549001DPIFGXC1TOL40 US313385TA41 U.S. Government Agency Debt (if categorized as no-coupon discount notes) Y 2026-02-13 2026-02-13 2026-02-13 N N N 0.0384 573518.40 573518.40 0.0011 N N Y N Federal Home Loan Bank Federal Home Loan Bank 3.500 3130B8WC2 2549001DPIFGXC1TOL40 US3130B8WC23 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2027-01-11 2027-01-11 2027-01-11 N N N 0.0367 3398659.79 3398659.79 0.0068 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.720 3130B8SD5 2549001DPIFGXC1TOL40 US3130B8SD51 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-06-02 2026-06-02 N N N 0.0372 1134969.92 1134969.92 0.0023 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.740 3130B8F56 2549001DPIFGXC1TOL40 US3130B8F569 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-07-02 2026-07-02 N N N 0.0397 1294973.61 1294973.61 0.0026 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.720 3130B8NZ1 2549001DPIFGXC1TOL40 US3130B8NZ19 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-08-21 2026-08-21 N N N 0.0387 4024891.36 4024891.36 0.0080 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.740 3130B8EX6 2549001DPIFGXC1TOL40 US3130B8EX61 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-06-30 2026-06-30 N N N 0.0383 589989.71 589989.71 0.0012 N N N N Federal Home Loan Bank Federal Home Loan Bank 0.000 313385TU0 2549001DPIFGXC1TOL40 US313385TU05 U.S. Government Agency Debt (if categorized as no-coupon discount notes) Y 2026-03-03 2026-03-03 2026-03-03 N N N 0.0360 2300965.96 2300965.96 0.0046 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.720 3130B6TL0 2549001DPIFGXC1TOL40 US3130B6TL03 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-02-17 2026-02-17 N N N 0.0372 599990.27 599990.27 0.0012 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.740 3130B8ZS4 2549001DPIFGXC1TOL40 US3130B8ZS48 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-01-04 2027-01-04 N N N 0.0370 500000.00 500000.00 0.0010 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.710 3130B8MR0 2549001DPIFGXC1TOL40 US3130B8MR02 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2026-04-17 2026-04-17 N N N 0.0385 569996.68 569996.68 0.0011 N N N N Federal Home Loan Bank Federal Home Loan Bank 3.775 3130B5Q84 2549001DPIFGXC1TOL40 US3130B5Q844 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-03-25 2027-03-25 N N N 0.0384 1030226.00 1030226.00 0.0021 N N N N Federal Home Loan Mortgage Corp. Federal Home Loan Mortgage Corp. 3.825 3134HBPD7 S6XOOCT0IEG5ABCC6L87 US3134HBPD74 U.S. Government Agency Debt (if categorized as coupon-paying notes) Y 2026-01-02 2027-05-05 2027-05-05 N N N 0.0411 799978.21 799978.21 0.0016 N N N N Federal Home Loan Mortgage Corp. 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Tri-Party Citigroup Global Markets, Inc. 3.820 BYDWSJLZ9 MBNUM2BPBDO7JBLYG310 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDWSJLZ9 2027-08-15 2027-09-30 3.375000 - 4.125000 N/A 10091246.00 10199946.40 U.S. Treasuries (including strips) Y 2026-01-02 2026-01-02 2026-01-02 N N N 0.0382 10000000.00 10000000.00 0.0200 N Y Y N Tri-Party Citigroup Global Markets, Inc. Tri-Party Citigroup Global Markets, Inc. 3.830 BYDWSJM13 MBNUM2BPBDO7JBLYG310 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDWSJM13 2026-02-15 2027-08-15 0.500000 - 6.375000 N/A 10219086.00 10200172.25 U.S. Treasuries (including strips) Y 2026-01-02 2026-01-02 2026-01-02 N N N 0.0383 10000000.00 10000000.00 0.0200 N Y Y N Tri-Party Goldman Sachs Group LP Tri-Party Goldman Sachs Group LP 3.840 BYDWSJMW5 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 BYDWSJMW5 2038-07-20 2055-12-20 3.000000 - 6.500000 N/A 26476056.00 25500000.12 Agency Mortgage-Backed Securities Y 2026-01-02 2026-01-02 2026-01-02 N N N 0.0384 25000000.00 25000000.00 0.0500 N Y Y N Tri-Party Mitsubishi UFJ Tri-Party Mitsubishi UFJ 3.830 BYDWSJN79 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 BYDWSJN79 2028-12-20 2054-07-20 2.500000 - 7.500000 N/A 26018708.00 25500000.01 Agency Mortgage-Backed Securities Y 2026-01-02 2026-01-02 2026-01-02 N N N 0.0383 25000000.00 25000000.00 0.0500 N Y Y N Tri-Party Mizuho Securities Tri-Party Mizuho Securities 3.840 BYDWSJNA2 7TK5RJIZDFROZCA6XF66 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDWSJNA2 2034-02-15 4.000000 N/A 30586932.00 30600084.59 U.S. Treasuries (including strips) Y 2026-01-02 2026-01-02 2026-01-02 N N N 0.0384 30000000.00 30000000.00 0.0600 N Y Y N Tri-Party Natixis S.A. Tri-Party Natixis S.A. 3.840 BYDWSJNE4 549300L8G1E7ZHVEOG75 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDWSJNE4 2026-03-19 2049-02-15 0.000000 - 4.375000 N/A 32445624.00 30600072.40 U.S. Treasuries (including strips) Y 2026-01-02 2026-01-02 2026-01-02 N N N 0.0384 30000000.00 30000000.00 0.0600 N Y Y N Tri-Party TD Securities Tri-Party TD Securities 3.830 BYDWSJNM6 SUVUFHICNZMP2WKHG940 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US Treasury 254900HROIFWPRGM1V77 BYDWSJNM6 2029-09-30 2052-05-15 2.875000 - 3.500000 N/A 26001360.00 25500037.94 U.S. Treasuries (including strips) Y 2026-01-02 2026-01-02 2026-01-02 N N N 0.0383 25000000.00 25000000.00 0.0500 N Y Y N US Treasury US Treasury 0.000 912797SB4 254900HROIFWPRGM1V77 US912797SB42 U.S. Treasury Debt Y 2026-03-12 2026-03-12 2026-03-12 N N N 0.0372 1243489.88 1243489.88 0.0025 N Y Y N US Treasury US Treasury 0.000 912797SY4 254900HROIFWPRGM1V77 US912797SY45 U.S. Treasury Debt Y 2026-03-10 2026-03-10 2026-03-10 N N N 0.0387 5752520.34 5752520.34 0.0115 N Y Y N US Treasury US Treasury 0.000 912797PM3 254900HROIFWPRGM1V77 US912797PM34 U.S. Treasury Debt Y 2026-02-19 2026-02-19 2026-02-19 N N N 0.0386 785251.28 785251.28 0.0016 N Y Y N US Treasury US Treasury 0.000 912797SQ1 254900HROIFWPRGM1V77 US912797SQ11 U.S. Treasury Debt Y 2026-02-10 2026-02-10 2026-02-10 N N N 0.0383 5655289.92 5655289.92 0.0113 N Y Y N US Treasury US Treasury 0.000 912797QD2 254900HROIFWPRGM1V77 US912797QD26 U.S. Treasury Debt Y 2026-04-16 2026-04-16 2026-04-16 N N N 0.0381 5693441.25 5693441.25 0.0114 N Y Y N US Treasury US Treasury 3.752 91282CKM2 254900HROIFWPRGM1V77 US91282CKM28 U.S. Treasury Debt Y 2026-01-06 2026-04-30 2026-04-30 N N N 0.0374 7299495.57 7299495.57 0.0146 N Y Y N US Treasury US Treasury 0.000 912797SS7 254900HROIFWPRGM1V77 US912797SS76 U.S. Treasury Debt Y 2026-02-24 2026-02-24 2026-02-24 N N N 0.0383 1960747.53 1960747.53 0.0039 N Y Y N US Treasury US Treasury 0.000 912797RG4 254900HROIFWPRGM1V77 US912797RG48 U.S. Treasury Debt Y 2026-08-06 2026-08-06 2026-08-06 N N N 0.0392 444723.50 444723.50 0.0009 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 794371.83 794371.83 0.0016 N Y Y N US Treasury US Treasury 0.000 912797PD3 254900HROIFWPRGM1V77 US912797PD35 U.S. Treasury Debt Y 2026-01-22 2026-01-22 2026-01-22 N N N 0.0403 861296.38 861296.38 0.0017 N Y Y N US Treasury US Treasury 0.000 912797RS8 254900HROIFWPRGM1V77 US912797RS85 U.S. Treasury Debt Y 2026-09-03 2026-09-03 2026-09-03 N N N 0.0382 8723529.03 8723529.03 0.0174 N Y Y N US Treasury US Treasury 2.375 9128286S4 254900HROIFWPRGM1V77 US9128286S43 U.S. Treasury Debt Y 2026-04-30 2026-04-30 2026-04-30 N N N 0.0407 268990.84 268990.84 0.0005 N Y Y N US Treasury US Treasury 0.000 912797SZ1 254900HROIFWPRGM1V77 US912797SZ10 U.S. Treasury Debt Y 2026-03-17 2026-03-17 2026-03-17 N N N 0.0387 174734.09 174734.09 0.0003 N Y Y N US Treasury US Treasury 0.000 912797SL2 254900HROIFWPRGM1V77 US912797SL24 U.S. Treasury Debt Y 2026-04-09 2026-04-09 2026-04-09 N N N 0.0382 2937580.91 2937580.91 0.0059 N Y Y N US Treasury US Treasury 0.000 912797SX6 254900HROIFWPRGM1V77 US912797SX61 U.S. Treasury Debt Y 2026-06-04 2026-06-04 2026-06-04 N N N 0.0375 10379025.01 10379025.01 0.0208 N Y Y N US Treasury US Treasury 3.807 91282CLT6 254900HROIFWPRGM1V77 US91282CLT61 U.S. Treasury Debt Y 2026-01-06 2026-10-31 2026-10-31 N N N 0.0381 8556563.66 8556563.66 0.0171 N Y Y N US Treasury US Treasury 0.000 912797RT6 254900HROIFWPRGM1V77 US912797RT68 U.S. Treasury Debt Y 2026-02-12 2026-02-12 2026-02-12 N N N 0.0401 7867705.67 7867705.67 0.0157 N Y Y N US Treasury US Treasury 3.792 91282CPG0 254900HROIFWPRGM1V77 US91282CPG05 U.S. Treasury Debt Y 2026-01-06 2027-10-31 2027-10-31 N N N 0.0375 8751118.00 8751118.00 0.0175 N Y Y N US Treasury US Treasury 0.000 912797TG2 254900HROIFWPRGM1V77 US912797TG20 U.S. Treasury Debt Y 2026-04-07 2026-04-07 2026-04-07 N N N 0.0371 2635262.98 2635262.98 0.0053 N Y Y N US Treasury US Treasury 0.000 912797TJ6 254900HROIFWPRGM1V77 US912797TJ68 U.S. Treasury Debt Y 2026-04-21 2026-04-21 2026-04-21 N N N 0.0363 2206158.62 2206158.62 0.0044 N Y Y N US Treasury US Treasury 0.000 912797SD0 254900HROIFWPRGM1V77 US912797SD08 U.S. Treasury Debt Y 2026-04-02 2026-04-02 2026-04-02 N N N 0.0383 1972320.93 1972320.93 0.0039 N Y Y N US Treasury US Treasury 0.000 912797SW8 254900HROIFWPRGM1V77 US912797SW88 U.S. Treasury Debt Y 2026-05-28 2026-05-28 2026-05-28 N N N 0.0378 7691135.37 7691135.37 0.0154 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 298438.33 298438.33 0.0006 N Y Y N US Treasury US Treasury 0.000 912797TB3 254900HROIFWPRGM1V77 US912797TB33 U.S. Treasury Debt Y 2026-03-31 2026-03-31 2026-03-31 N N N 0.0384 5051214.54 5051214.54 0.0101 N Y Y N US Treasury US Treasury 4.250 91282CLY5 254900HROIFWPRGM1V77 US91282CLY56 U.S. Treasury Debt Y 2026-11-30 2026-11-30 2026-11-30 N N N 0.0367 177078.22 177078.22 0.0004 N Y Y N US Treasury US Treasury 3.784 91282CLA7 254900HROIFWPRGM1V77 US91282CLA70 U.S. Treasury Debt Y 2026-01-06 2026-07-31 2026-07-31 N N N 0.0384 4611584.97 4611584.97 0.0092 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 0.0415 1769131.98 1769131.98 0.0035 N Y Y N US Treasury US Treasury 0.000 912797ST5 254900HROIFWPRGM1V77 US912797ST59 U.S. Treasury Debt Y 2026-03-03 2026-03-03 2026-03-03 N N N 0.0364 198815.38 198815.38 0.0004 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 0.0381 5788580.06 5788580.06 0.0116 N Y Y N US Treasury US Treasury 0.000 912797SJ7 254900HROIFWPRGM1V77 US912797SJ77 U.S. Treasury Debt Y 2026-02-03 2026-02-03 2026-02-03 N N N 0.0388 7713831.28 7713831.28 0.0154 N Y Y N US Treasury US Treasury 0.000 912797TE7 254900HROIFWPRGM1V77 US912797TE71 U.S. Treasury Debt Y 2026-06-25 2026-06-25 2026-06-25 N N N 0.0360 8819300.07 8819300.07 0.0176 N Y Y N US Treasury US Treasury 0.000 912797RK5 254900HROIFWPRGM1V77 US912797RK59 U.S. Treasury Debt Y 2026-01-29 2026-01-29 2026-01-29 N N N 0.0427 997359.21 997359.21 0.0020 N Y Y 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 400519.88 400519.88 0.0008 N Y Y N US Treasury US Treasury 0.000 912797TD9 254900HROIFWPRGM1V77 US912797TD98 U.S. Treasury Debt Y 2026-06-18 2026-06-18 2026-06-18 N N N 0.0361 2272516.45 2272516.45 0.0045 N Y Y N US Treasury US Treasury 0.000 912797RL3 254900HROIFWPRGM1V77 US912797RL33 U.S. Treasury Debt Y 2026-02-05 2026-02-05 2026-02-05 N N N 0.0412 6327765.26 6327765.26 0.0127 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 236876.52 236876.52 0.0005 N Y Y N US Treasury US Treasury 0.000 912797SN8 254900HROIFWPRGM1V77 US912797SN89 U.S. Treasury Debt Y 2026-04-30 2026-04-30 2026-04-30 N N N 0.0376 8946385.65 8946385.65 0.0179 N Y Y N US Treasury US Treasury 4.125 91282CLS8 254900HROIFWPRGM1V77 US91282CLS88 U.S. Treasury Debt Y 2026-10-31 2026-10-31 2026-10-31 N N N 0.0373 227969.73 227969.73 0.0005 N Y Y N US Treasury US Treasury 0.000 912797TF4 254900HROIFWPRGM1V77 US912797TF47 U.S. Treasury Debt Y 2026-07-02 2026-07-02 2026-07-02 N N N 0.0361 407686.28 407686.28 0.0008 N Y Y 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 598441.14 598441.14 0.0012 N Y Y N US Treasury US Treasury 0.000 912797QX8 254900HROIFWPRGM1V77 US912797QX89 U.S. Treasury Debt Y 2026-06-11 2026-06-11 2026-06-11 N N N 0.0404 4481188.43 4481188.43 0.0090 N Y Y N US Treasury US Treasury 0.000 912797RV1 254900HROIFWPRGM1V77 US912797RV15 U.S. Treasury Debt Y 2026-03-05 2026-03-05 2026-03-05 N N N 0.0397 15146234.27 15146234.27 0.0303 N Y Y N US Treasury US Treasury 0.000 912797RA7 254900HROIFWPRGM1V77 US912797RA77 U.S. Treasury Debt Y 2026-01-02 2026-01-02 2026-01-02 N N N 0.0426 4785000.00 4785000.00 0.0096 N Y Y N US Treasury US Treasury 0.000 912797SR9 254900HROIFWPRGM1V77 US912797SR93 U.S. Treasury Debt Y 2026-02-17 2026-02-17 2026-02-17 N N N 0.0366 7109752.23 7109752.23 0.0142 N Y Y N US Treasury US Treasury 3.700 91282CMJ7 254900HROIFWPRGM1V77 US91282CMJ70 U.S. Treasury Debt Y 2026-01-06 2027-01-31 2027-01-31 N N N 0.0370 10396982.13 10396982.13 0.0208 N Y Y N US Treasury US Treasury 0.000 912797RU3 254900HROIFWPRGM1V77 US912797RU32 U.S. Treasury Debt Y 2026-02-26 2026-02-26 2026-02-26 N N N 0.0402 3525563.60 3525563.60 0.0071 N Y Y N US Treasury US Treasury 0.000 912797SM0 254900HROIFWPRGM1V77 US912797SM07 U.S. Treasury Debt Y 2026-04-23 2026-04-23 2026-04-23 N N N 0.0378 5029614.28 5029614.28 0.0101 N Y Y N US Treasury US Treasury 0.000 912797TA5 254900HROIFWPRGM1V77 US912797TA59 U.S. Treasury Debt Y 2026-03-24 2026-03-24 2026-03-24 N N N 0.0384 1426597.63 1426597.63 0.0029 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 4203923.66 4203923.66 0.0084 N Y Y N US Treasury US Treasury 0.000 912797TC1 254900HROIFWPRGM1V77 US912797TC16 U.S. Treasury Debt Y 2026-12-24 2026-12-24 2026-12-24 N N N 0.0352 3671193.54 3671193.54 0.0073 N Y Y N Northwestern Mutual Series Fund, Inc. 2026-01-07 /s/Linda Wisniewski Linda Wisniewski Controller and Chief Accounting Officer