X0101 24F-2NT LIVE 742212 XXXXXXXX false N-1A NORTHWESTERN MUTUAL SERIES FUND INC 720 East Wisconsin Avenue Milwaukee WI X1 53202 SMALL CAP GROWTH STOCK PORTFOLIO S000000039 Small Cap Growth Stock Portfolio C000000074 LARGE CAP CORE STOCK PORTFOLIO S000000040 Large Cap Core Stock Portfolio C000000075 DOMESTIC EQUITY PORTFOLIO S000000041 Domestic Equity Portfolio C000000076 EQUITY INCOME PORTFOLIO S000000042 Equity Income Portfolio C000000077 INDEX 500 STOCK PORTFOLIO S000000043 Index 500 Stock Portfolio C000000078 ASSET ALLOCATION PORTFOLIO S000000044 Asset Allocation Portfolio C000000079 BALANCED PORTFOLIO S000000045 Balanced Portfolio C000000080 HIGH YIELD BOND PORTFOLIO S000000046 High Yield Bond Portfolio C000000081 SELECT BOND PORTFOLIO S000000047 Select Bond Portfolio C000000082 GOVERNMENT MONEY MARKET PORTFOLIO S000000048 Government Money Market Portfolio C000000083 SMALL CAP VALUE PORTFOLIO S000000049 Small Cap Value Portfolio C000000084 MID CAP GROWTH STOCK PORTFOLIO S000000050 Mid Cap Growth Stock Portfolio C000000085 INTERNATIONAL GROWTH PORTFOLIO S000000051 International Growth Portfolio C000000086 INTERNATIONAL EQUITY PORTFOLIO S000000052 International Equity Portfolio C000000087 MID CAP VALUE PORTFOLIO S000000053 Mid Cap Value Portfolio C000000088 INDEX 400 STOCK PORTFOLIO S000000054 Index 400 Stock Portfolio C000000089 FOCUSED APPRECIATION PORTFOLIO S000000055 Focused Appreciation Portfolio C000000090 GROWTH STOCK PORTFOLIO S000000056 Growth Stock Portfolio C000000091 LARGE COMPANY VALUE PORTFOLIO S000018227 Large Company Value Portfolio C000050275 INFLATION PROTECTION PORTFOLIO S000018228 Inflation Protection Portfolio C000050276 LARGE CAP BLEND PORTFOLIO S000018229 Large Cap Blend Portfolio C000050277 RESEARCH INTERNATIONAL CORE PORTFOLIO S000018230 Research International Core Portfolio C000050278 INDEX 600 STOCK PORTFOLIO S000018231 Index 600 Stock Portfolio C000050279 EMERGING MARKETS EQUITY PORTFOLIO S000018232 Emerging Markets Equity Portfolio C000050280 SHORT-TERM BOND PORTFOLIO S000018233 Short-Term Bond Portfolio C000050281 LONG-TERM US GOVERNMENT BOND PORTFOLIO S000018234 Long-Term US Government Bond Portfolio C000050282 MULTI-SECTOR BOND PORTFOLIO S000018235 Multi-Sector Bond Portfolio C000050283 811-3990 002-89971 12/31/2022 false false 330229799.00 636657126.00 276193184.00 912850310.00 0.00 (582620511.00) 0.0001102 0.00 0 0.00 Linda Wisniewski Linda Wisniewski Assistant Controller, Northwestern Mutual Series Fund, Inc. 03/20/2023