NPORT-P false 0000742212 XXXXXXXX S000000044 C000000079 NORTHWESTERN MUTUAL SERIES FUND INC 811-03990 0000742212 549300T1UBX7MDSNZA55 720 E WISCONSIN AVE MILWAUKEE 53202 414-271-1444 Active/Passive Moderate Portfolio S000000044 5DD2LVSRPBY8KFA02K39 2025-12-31 2025-09-30 N 295687252.99 68777.84 295618475.15 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 5864120.00000000 N JPMorgan Ultra-Short Income ETF 549300VN24B8TQAGGX74 46641Q837 58330.00000000 NS USD 2959080.90000000 1.000979691306 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - International Growth Portfolio A7EFFZCFPQNSS1P3HZ68 668140684 4606818.89000000 NS USD 10093540.18000000 3.414380706374 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Domestic Equity Portfolio 5493004TKKI7X6F71K84 668140791 8096587.89000000 NS USD 11966756.90000000 4.048040939906 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Focused Appreciation Portfolio 5493007QO6Z6UMWHLZ04 668140775 2679638.31000000 NS USD 12647892.83000000 4.278451413966 Long EC RF US N 1 N N N iShares Core U.S. Aggregate Bond ETF 549300F7VSXTKBGHJE47 464287226 223131.00000000 NS USD 22368882.75000000 7.566808109219 Long EC RF US N 1 N N N iShares MSCI Intl Quality Factor ETF 549300NCBUPWCYENVS18 46434V456 133830.00000000 NS USD 5913947.70000000 2.000533862776 Long EC RF US N 1 N N N Schwab U.S. REIT ETF 549300OLDKO120DR6467 808524847 199570.00000000 NS USD 4304724.90000000 1.456175869189 Long EC US N 1 N N N Northwestern Mutual Series Fund, Inc. - Select Bond Portfolio 03DZ35VFRGD62UKLL347 668140759 47862513.20000000 NS USD 52648764.52000000 17.80970032176 Long EC RF US N 1 N N N United States Treasury 254900HROIFWPRGM1V77 912797NA1 2000000.00000000 PA USD 1993468.26000000 0.674338185050 Long STIV UST US N 2 2025-10-30 None 0.00000000 N N N N N N abrdn Bloomberg All Commodity Strategy K-1 Free ETF 549300PWXO8WGDSMS419 003261104 46500.00000000 NS USD 1001610.00000000 0.338818471846 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Multi-Sector Bond Portfolio P0C14V6IL3O47L1ZG636 668140882 14469183.26000000 NS USD 14527059.99000000 4.914124525751 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - International Equity Portfolio 5493009J2EF7GK480170 668140692 8765763.66000000 NS USD 17785734.47000000 6.016448891083 Long EC RF US N 1 N N N SPDR Portfolio Long Term Treasury ETF 549300GYQKAMF6JUVI06 78464A664 219320.00000000 NS USD 5910674.00000000 1.999426455670 Long EC RF US N 1 N N N Dimensional International Value ETF 549300F3EUNKP4DGBS58 25434V807 66500.00000000 NS USD 3066980.00000000 1.037479135376 Long EC RF US N 1 N N N United States Treasury 254900HROIFWPRGM1V77 91282CAZ4 2000000.00000000 PA USD 1987812.50000000 0.672424989335 Long DBT UST US N 2 2025-11-30 Fixed 0.38000000 N N N N N N Invesco S&P 500 Equal Weight ETF 549300F8VBQFIX481R47 46137V357 26700.00000000 NS USD 5064990.00000000 1.713353672306 Long EC RF US N 1 N N N SPDR Portfolio S&P 400 Mid Cap ETF 549300TKUU0ZLRVSLJ96 78464A847 173480.00000000 NS USD 9921321.20000000 3.356123528803 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Short-Term Bond Portfolio. BEEDB5U9NNUVQYFFEL15 668140601 2721209.03000000 NS USD 2827336.19000000 0.956413900912 Long EC RF US N 1 N N N iShares MSCI USA Value Factor ETF 549300QCMVXVCAPD3O82 46432F388 54450.00000000 NS USD 6808972.50000000 2.303297348565 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Mid Cap Value Portfolio 8TRVIGMWHSWZVXP7PI34 668140783 4494139.99000000 NS USD 6840081.07000000 2.313820564336 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Emerging Markets Equity Portfolio 549300B2SFS01R9MCJ10 668140502 10114919.48000000 NS USD 12411006.20000000 4.198318861398 Long EC RF US N 1 N N N Morgan Stanley & Co. LLC 9R7GPTSO7KV3UQJZQ078 000000000 6149110.24000000 OU Notional Amount USD 103130.56000000 0.034886371681 N/A DCO US N 2 Morgan Stanley & Co. LLC 9R7GPTSO7KV3UQJZQ078 Bloomberg Commodity Index 3 Month Forward BCOMF3 Index Y equity-performance leg 2025-10-31 0.00000000 USD 0.00000000 USD 6149110.24000000 USD 103130.56000000 N N N SPDR Dow Jones REIT ETF 54930077YVRJPO64VF50 78464A607 43610.00000000 NS USD 4373646.90000000 1.479490379544 Long EC US N 1 N N N iShares Core MSCI EAFE ETF 5493009FT582MI7Y3I36 46432F842 114870.00000000 NS USD 10029299.70000000 3.392649831818 Long EC RF US N 1 N N N iShares Core S&P 500 ETF 5493007M4YMN8XL48C14 464287200 43050.00000000 NS USD 28813365.00000000 9.746807937284 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Small Cap Value Portfolio 5493006BEZYY47A02J59 668140817 1827074.72000000 NS USD 3486058.57000000 1.179242457099 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Small Cap Growth Stock Portfolio YTR2S467AP5XPLF6CQ13 668140825 1394517.82000000 NS USD 3465376.78000000 1.172246348352 Long EC RF US N 1 N N N SPDR Portfolio S&P 600 Small Cap ETF 549300NYZX301TBLUJ08 78468R853 142000.00000000 NS USD 6577440.00000000 2.224975958171 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Large Cap Blend Portfolio 549300J8IDGQV6XROU84 668140205 11265527.20000000 NS USD 12628656.00000000 4.271944097401 Long EC RF US N 1 N N N Northwestern Mutual Series Fund, Inc. - Mid Cap Growth Stock Portfolio LIP0ME8UWTR611J45283 668140866 2314384.33000000 NS USD 7283367.50000000 2.463772772085 Long EC RF US N 1 N N N 2025-10-28 NORTHWESTERN MUTUAL SERIES FUND INC Linda Wisniewski Linda Wisniewski Controller and Chief Accounting Officer XXXX