NPORT-P false 0000742212 XXXXXXXX S000000045 C000000080 NORTHWESTERN MUTUAL SERIES FUND INC 811-03990 0000742212 549300T1UBX7MDSNZA55 720 E WISCONSIN AVE MILWAUKEE 53202 414-271-1444 Balanced Portfolio S000000045 4F2ZSMZDZU02NP7J8L64 2025-12-31 2025-03-31 N 1893269995.44 1149449.67 1892120545.77 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 28551960.67000000 N Balanced Portfolio Blended Composite Benchmark SPXT, SPTRMDCP, SPTRSMCP, NDDUEAFE, NDUEEGF, DWRTFT, BCOMTR, LBUSTRUU, G0O1 JPMorgan Ultra-Short Income ETF 549300VN24B8TQAGGX74 46641Q837 188550.00000000 NS USD 9546286.50000000 0.504528452023 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - International Growth Portfolio A7EFFZCFPQNSS1P3HZ68 668140684 35249709.93000000 NS USD 69759175.95000000 3.686825139442 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Domestic Equity Portfolio 5493004TKKI7X6F71K84 668140791 31008031.13000000 NS USD 47411279.59000000 2.505721937008 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Focused Appreciation Portfolio 5493007QO6Z6UMWHLZ04 668140775 9843796.73000000 NS USD 42308638.35000000 2.236043493348 Long EC RF US N 1 N N N iShares Core U.S. Aggregate Bond ETF 549300F7VSXTKBGHJE47 464287226 2333000.00000000 NS USD 230780360.00000000 12.19691633896 Long EC RF US N 1 N N N Schwab U.S. REIT ETF 549300OLDKO120DR6467 808524847 1297100.00000000 NS USD 27900621.00000000 1.474568893740 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Select Bond Portfolio 03DZ35VFRGD62UKLL347 668140759 466074311.99000000 NS USD 518274634.94000000 27.39120591965 Long EC RF US N 1 N N N abrdn Bloomberg All Commodity Strategy K-1 Free ETF 549300PWXO8WGDSMS419 003261104 258400.00000000 NS USD 5545264.00000000 0.293071390847 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Multi-Sector Bond Portfolio P0C14V6IL3O47L1ZG636 668140882 145989213.87000000 NS USD 146573170.73000000 7.746502782694 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - International Equity Portfolio 5493009J2EF7GK480170 668140692 44519866.68000000 NS USD 77865246.83000000 4.115237108125 Long EC RF US N 1 N N N SPDR Portfolio Long Term Treasury ETF 549300GYQKAMF6JUVI06 78464A664 3654800.00000000 NS USD 99629848.00000000 5.265512719193 Long EC RF US N 1 N N N Morgan Stanley & Co. LLC 9R7GPTSO7KV3UQJZQ078 000000000 35372653.12000000 OU Notional Amount USD 1294324.08000000 0.068406005256 N/A DCO US N 2 Morgan Stanley & Co. LLC 9R7GPTSO7KV3UQJZQ078 Bloomberg Commodity Index 3 Month Forward BCOMF3 INDEX Y equity-performance leg 2025-04-30 0.00000000 USD 0.00000000 USD 35372653.12000000 USD 1294324.08000000 N N N Invesco S&P 500 Equal Weight ETF 549300F8VBQFIX481R47 46137V357 106400.00000000 NS USD 18431672.00000000 0.974127787006 Long EC RF US N 1 N N N iShares Core S&P Small-Cap ETF 549300BZQ17QYN750B25 464287804 48800.00000000 NS USD 5103016.00000000 0.269698250008 Long EC RF US N 1 N N N SPDR Portfolio S&P 400 Mid Cap ETF 549300TKUU0ZLRVSLJ96 78464A847 757200.00000000 NS USD 38753496.00000000 2.048151534881 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Short-Term Bond Portfolio. BEEDB5U9NNUVQYFFEL15 668140601 29204808.43000000 NS USD 30781868.09000000 1.626844978710 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Mid Cap Value Portfolio 8TRVIGMWHSWZVXP7PI34 668140783 21351675.56000000 NS USD 33351317.22000000 1.762642305986 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Emerging Markets Equity Portfolio 549300B2SFS01R9MCJ10 668140502 68867955.82000000 NS USD 66526445.32000000 3.515972883901 Long EC RF US N 1 N N N United States Treasury 254900HROIFWPRGM1V77 912797NN3 11300000.00000000 PA USD 11222857.61000000 0.593136501534 Long STIV UST US N 2 2025-05-29 None 0.00000000 N N N N N N SPDR Dow Jones REIT ETF 54930077YVRJPO64VF50 78464A607 279800.00000000 NS USD 27733776.00000000 1.465751009469 Long EC RF US N 1 N N N United States Treasury 254900HROIFWPRGM1V77 912797PB7 11300000.00000000 PA USD 11262781.98000000 0.595246534644 Long STIV UST US N 2 2025-04-29 None 0.00000000 N N N N N N iShares Core MSCI EAFE ETF 5493009FT582MI7Y3I36 46432F842 731300.00000000 NS USD 55322845.00000000 2.923854144688 Long EC RF US N 1 N N N iShares Core S&P Mid-Cap ETF 549300ODQWH5PC0IUZ78 464287507 154650.00000000 NS USD 9023827.50000000 0.476916099250 Long EC RF US N 1 N N N iShares Core S&P 500 ETF 5493007M4YMN8XL48C14 464287200 233800.00000000 NS USD 131372220.00000000 6.943121055034 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Small Cap Value Portfolio 5493006BEZYY47A02J59 668140817 12331374.52000000 NS USD 23552925.33000000 1.244789893680 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Small Cap Growth Stock Portfolio YTR2S467AP5XPLF6CQ13 668140825 8989834.56000000 NS USD 19822585.20000000 1.047638600210 Long EC RF US N 1 N N N SPDR Portfolio S&P 600 Small Cap ETF 549300NYZX301TBLUJ08 78468R853 741500.00000000 NS USD 30223540.00000000 1.597336917437 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Large Cap Blend Portfolio 549300J8IDGQV6XROU84 668140205 42407468.44000000 NS USD 44782286.67000000 2.366777675455 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Mid Cap Growth Stock Portfolio LIP0ME8UWTR611J45283 668140866 9693736.71000000 NS USD 29585284.43000000 1.563604628475 Long EC RF US N 1 N N N 2025-04-25 NORTHWESTERN MUTUAL SERIES FUND INC Linda Wisniewski Linda Wisniewski Controller and Chief Accounting Officer XXXX