NPORT-P false 0000742212 XXXXXXXX S000000050 C000000085 NORTHWESTERN MUTUAL SERIES FUND INC 811-03990 0000742212 549300T1UBX7MDSNZA55 720 E WISCONSIN AVE MILWAUKEE 53202 414-271-1444 Mid Cap Growth Stock Portfolio S000000050 LIP0ME8UWTR611J45283 2026-12-31 2026-06-30 N 1110528036.32 519772.95 1110008263.37 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 5002880.63000000 N Affirm Holdings Inc N/A 00827B106 135630.00000000 NS USD 11060626.50000000 0.996445419822 Long EC CORP US N 1 N N N Agilent Technologies Inc QUIX8Y7A2WP0XRMW7G29 00846U101 39755.00000000 NS USD 5280656.65000000 0.475731291762 Long EC CORP US N 1 N N N Allegro MicroSystems Inc 54930004TGPV6DR3LE12 01749D105 136382.00000000 NS USD 9494914.84000000 0.855391365391 Long EC CORP US N 1 N N N Alnylam Pharmaceuticals Inc 529900S3ZI14OWRJII50 02043Q107 51400.00000000 NS USD 15472942.00000000 1.393948361521 Long EC CORP US N 1 N N N Cencora Inc AI8GXW8LG5WK7E9UD086 03073E105 63616.00000000 NS USD 18002055.68000000 1.621794744603 Long EC CORP US N 1 N N N AMETEK Inc 549300WZDEF9KKE40E98 031100100 39516.00000000 NS USD 9560501.04000000 0.861299988071 Long EC CORP US N 1 N N N Astera Labs Inc 529900LJL8TUEGF7HG20 04626A103 56134.00000000 NS USD 27113844.68000000 2.442670525504 Long EC CORP US N 1 N N N Autodesk Inc FRKKVKAIQEF3FCSTPG55 052769106 22095.00000000 NS USD 4295709.90000000 0.386998010893 Long EC CORP US N 1 N N N AutoZone Inc GA3JGKJ41LJKXDN23E90 053332102 1968.00000000 NS USD 6289609.92000000 0.566627306080 Long EC CORP US N 1 N N N Axon Enterprise Inc 549300QP2IEEGFE16681 05464C101 15405.00000000 NS USD 8636197.05000000 0.778029978243 Long EC CORP US N 1 N N N BWX Technologies Inc 549300NP85N265KWMS58 05605H100 54322.00000000 NS USD 10573777.30000000 0.952585458048 Long EC CORP US N 1 N N N Bank of New York Mellon Corp/The WFLLPEPC7FZXENRZV188 064058100 34624.00000000 NS USD 5006976.64000000 0.451075618554 Long EC CORP US N 1 N N N Bridgebio Pharma Inc 54930028YG89VTY2J114 10806X102 96638.00000000 NS USD 7197598.24000000 0.648427446670 Long EC CORP US N 1 N N N Burlington Stores Inc 5299003Z37DVGKKC1W09 122017106 43484.00000000 NS USD 13775731.20000000 1.241047625913 Long EC CORP US N 1 N N N CBRE Group Inc 52990016II9MJ2OSWA10 12504L109 52258.00000000 NS USD 7038630.02000000 0.634106092024 Long EC CORP US N 1 N N N Caris Life Sciences Inc 549300LX5LO78M5VPY43 142152107 281684.00000000 NS USD 5019608.88000000 0.452213649721 Long EC CORP US N 1 N N N Carlisle Cos Inc XR64VGX1ZPX6G7ZN7Z11 142339100 14212.00000000 NS USD 5155403.00000000 0.464447263153 Long EC CORP US N 1 N N N Carpenter Technology Corp DX6I6ZD3X5WNNCDJKP85 144285103 21991.00000000 NS USD 13564928.44000000 1.222056527652 Long EC CORP US N 1 N N N Carvana Co 5493003WEAK2PJ5WS063 146869102 56611.00000000 NS USD 3726136.02000000 0.335685430727 Long EC CORP US N 1 N N N Casey's General Stores Inc 549300CAFWSI86V66Q65 147528103 18322.00000000 NS USD 14562142.38000000 1.311894952546 Long EC CORP US N 1 N N N Cerebras Systems Inc N/A 15675D103 48211.00000000 NS USD 10654631.00000000 0.959869520939 Long EC CORP US N 1 N N N Cheniere Energy Inc MIHC87W9WTYSYZWV1J40 16411R208 34273.00000000 NS USD 8191589.73000000 0.737975562914 Long EC CORP US N 1 N N N Chipotle Mexican Grill Inc 529900REP5VGTPCP1J71 169656105 616156.00000000 NS USD 20949304.00000000 1.887310634643 Long EC CORP US N 1 N N N Ciena Corp W0CZ7N0GH8UIGXDM1H41 171779309 11414.00000000 NS USD 5599251.84000000 0.504433347460 Long EC CORP US N 1 N N N Circle Internet Group Inc 254900HFVVR6NPMQVN93 172573107 15279.00000000 NS USD 956923.77000000 0.086208706869 Long EC CORP US N 1 N N N Cloudflare Inc 5493007DY18BGNLDWU14 18915M107 67633.00000000 NS USD 16589022.24000000 1.494495382370 Long EC CORP US N 1 N N N Comfort Systems USA Inc 5299009DT1ZA5HTU6R38 199908104 15570.00000000 NS USD 30858961.50000000 2.780065925483 Long EC CORP US N 1 N N N CoreWeave Inc 984500511DP2B6186053 21873S108 73826.00000000 NS USD 7348640.04000000 0.662034714740 Long EC CORP US N 1 N N N Coupang Inc 549300XR4L1D80AK4W76 22266T109 126976.00000000 NS USD 2205573.12000000 0.198698801872 Long EC CORP US N 1 N N N Cytokinetics Inc 549300BE5DY1HW7IHA64 23282W605 34057.00000000 NS USD 2901315.83000000 0.261377858682 Long EC CORP US N 1 N N N Datadog Inc 549300F6JNO0KRPO1K63 23804L103 129498.00000000 NS USD 33716099.28000000 3.037463809290 Long EC CORP US N 1 N N N DigitalOcean Holdings Inc 549300EPISPY3RE3DL21 25402D102 58007.00000000 NS USD 9108839.21000000 0.820610036032 Long EC CORP US N 1 N N N Disc Medicine Inc N/A 254604101 54429.00000000 NS USD 3980937.06000000 0.358640308488 Long EC CORP US N 1 N N N DoorDash Inc 549300NUQ43FGGSK5051 25809K105 42463.00000000 NS USD 7835697.39000000 0.705913428627 Long EC CORP US N 1 N N N DraftKings Inc 2549006G33IUL6IVOD83 26142V105 135306.00000000 NS USD 3417829.56000000 0.307910280741 Long EC CORP US N 1 N N N EOG Resources Inc XWTZDRYZPBUHIQBKDB46 26875P101 57014.00000000 NS USD 7396426.22000000 0.666339743953 Long EC CORP US N 1 N N N Entegris Inc IYX6OWO7BT5DKO3BYG52 29362U104 33682.00000000 NS USD 6058044.52000000 0.545765713636 Long EC CORP US N 1 N N N Esab Corp 549300ZNV0SWBXEIWT04 29605J106 48779.00000000 NS USD 4811072.77000000 0.433426752643 Long EC CORP US N 1 N N N Expedia Group Inc 2549009GW3Z3DQCB8H87 30212P303 13315.00000000 NS USD 3407042.20000000 0.306938453742 Long EC CORP US N 1 N N N Fastenal Co 529900PP0C7H2HHPSJ32 311900104 467585.00000000 NS USD 22458107.55000000 2.023237870483 Long EC CORP US N 1 N N N Fervo Energy Co N/A 31556C106 135423.00000000 NS USD 3958414.29000000 0.356611245215 Long EC CORP US N 1 N N N Figure Technology Solutions Inc N/A 349381103 106834.00000000 NS USD 3280872.14000000 0.295571866288 Long EC CORP US N 1 N N N Arthur J Gallagher & Co 54930049QLLMPART6V29 363576109 37315.00000000 NS USD 8566404.55000000 0.771742412438 Long EC CORP US N 1 N N N Guidewire Software Inc 549300WXSG0J8IXZCK32 40171V100 28992.00000000 NS USD 3567465.60000000 0.321390904709 Long EC CORP US N 1 N N N HEICO Corp 529900O1DTDLCJ7L0I14 422806208 68902.00000000 NS USD 17770514.82000000 1.600935362953 Long EC CORP US N 1 N N N Hilton Worldwide Holdings Inc 549300HVGPK36ICB0B89 43300A203 19687.00000000 NS USD 6505766.02000000 0.586100683633 Long EC CORP US N 1 N N N Howmet Aerospace Inc 549300HO5WFZUT5N2T22 443201108 22767.00000000 NS USD 6121135.62000000 0.551449554205 Long EC CORP US N 1 N N N IRhythm Holdings Inc 549300FJI72RJGDQS384 450056106 17581.00000000 NS USD 2091259.95000000 0.188400394754 Long EC CORP US N 1 N N N ITT Inc 549300KDSERHTJOXUS80 45073V108 44664.00000000 NS USD 8832752.64000000 0.795737557230 Long EC CORP US N 1 N N N IDEXX Laboratories Inc OGMTXK0LUU1HKV2P0J84 45168D104 18780.00000000 NS USD 9886543.20000000 0.890672936972 Long EC CORP US N 1 N N N Ingersoll Rand Inc 5299004C02FMZCUOIR50 45687V106 60925.00000000 NS USD 4995240.75000000 0.450018339037 Long EC CORP US N 1 N N N Insmed Inc 529900Q55QAG41CCAC11 457669307 121599.00000000 NS USD 12964885.38000000 1.167998996749 Long EC CORP US N 1 N N N Ionis Pharmaceuticals Inc 549300SI4ZGLG0BLUZ92 462222100 95270.00000000 NS USD 7553958.30000000 0.680531717580 Long EC CORP US N 1 N N N IQVIA Holdings Inc 549300W3R20NM4KQPH86 46266C105 30262.00000000 NS USD 5847223.64000000 0.526772982954 Long EC CORP US N 1 N N N Jabil Inc 5493000CGCQY2OQU7669 466313103 43275.00000000 NS USD 16681647.00000000 1.502839893223 Long EC CORP US N 1 N N N Kulicke & Soffa Industries Inc 529900H6BEIRBF429744 501242101 35214.00000000 NS USD 4710224.64000000 0.424341403162 Long EC CORP US N 1 N N N Levi Strauss & Co MB0UERO0RDFKU8258G77 52736R102 266745.00000000 NS USD 6623278.35000000 0.596687301218 Long EC CORP US N 1 N N N Live Nation Entertainment Inc 5493007B9BM9ZXJINO78 538034109 75409.00000000 NS USD 13808141.99000000 1.243967495167 Long EC CORP US N 1 N N N Lumentum Holdings Inc 549300JLWRRC38DWEF52 55024U109 27403.00000000 NS USD 23513418.18000000 2.118310192449 Long EC CORP US N 1 N N N MKS Inc 549300KEQATBHAGVF505 55306N104 19444.00000000 NS USD 8648691.20000000 0.779155568963 Long EC CORP US N 1 N N N MSCI Inc 549300HTIN2PD78UB763 55354G100 11736.00000000 NS USD 6572629.44000000 0.592124370321 Long EC CORP US N 1 N N N MACOM Technology Solutions Holdings Inc N/A 55405Y100 28468.00000000 NS USD 10828373.16000000 0.975521851263 Long EC CORP US N 1 N N N MasTec Inc 549300TMDIT8WREDOF45 576323109 29848.00000000 NS USD 12418558.88000000 1.118780759550 Long EC CORP US N 1 N N N Mettler-Toledo International Inc 5493000BD5GJNUDIUG10 592688105 3043.00000000 NS USD 3887462.93000000 0.350219278386 Long EC CORP US N 1 N N N Microchip Technology Inc 5493007PTFULNYZJ1R12 595017104 69027.00000000 NS USD 6295262.40000000 0.567136534721 Long EC CORP US N 1 N N N MongoDB Inc 549300TPTG69WKWE1Z37 60937P106 11068.00000000 NS USD 3717741.20000000 0.334929146267 Long EC CORP US N 1 N N N Natera Inc 529900CQ3OZ0A0VYVU59 632307104 66291.00000000 NS USD 17994691.95000000 1.621131350443 Long EC CORP US N 1 N N N Neurocrine Biosciences Inc 549300FECER0XBN49756 64125C109 94716.00000000 NS USD 15962961.06000000 1.438093894142 Long EC CORP US N 1 N N N Okta Inc 549300N8J06I8MRHU620 679295105 42773.00000000 NS USD 5836375.85000000 0.525795711851 Long EC CORP US N 1 N N N PACCAR Inc KDTEY8BWE486IKZ3CC07 693718108 49607.00000000 NS USD 5958792.84000000 0.536824187408 Long EC CORP US N 1 N N N Performance Food Group Co 549300EUK8GR9IT1YK57 71377A103 103306.00000000 NS USD 11548577.74000000 1.040404663739 Long EC CORP US N 1 N N N Procore Technologies Inc 5493005PTWY0RHYRAH22 74275K108 67302.00000000 NS USD 2733807.24000000 0.246287107061 Long EC CORP US N 1 N N N Quanta Services Inc SHVRXXEACT60MMH07S24 74762E102 10446.00000000 NS USD 7521537.84000000 0.677610977161 Long EC CORP US N 1 N N N Rambus Inc 2549000211GDCQSLV833 750917106 65791.00000000 NS USD 8733097.34000000 0.786759669111 Long EC CORP US N 1 N N N Reddit Inc 529900APN1YHPBHPI679 75734B100 15779.00000000 NS USD 2738918.82000000 0.246747606336 Long EC CORP US N 1 N N N Rhythm Pharmaceuticals Inc 529900JPNWXQ8DPLA551 76243J105 63423.00000000 NS USD 7041855.69000000 0.634396690761 Long EC CORP US N 1 N N N Robinhood Markets Inc 213800FS5AO3YWIE6F63 770700102 239395.00000000 NS USD 24006530.60000000 2.162734404076 Long EC CORP US N 1 N N N ROBLOX Corp 529900ANZDBDFU91SO19 771049103 80803.00000000 NS USD 4394067.14000000 0.395858957541 Long EC CORP US N 1 N N N Rocket Cos Inc N/A 77311W101 269687.00000000 NS USD 4247570.25000000 0.382661137774 Long EC CORP US N 1 N N N Rocket Lab Corp 254900LNRW7906KUMM93 773121108 215503.00000000 NS USD 21905879.95000000 1.973488006611 Long EC CORP US N 1 N N N Rockwell Automation Inc VH3R4HHBHH12O0EXZJ88 773903109 33290.00000000 NS USD 16481213.20000000 1.484782928548 Long EC CORP US N 1 N N N Rubrik Inc 254900TRGK2WTBYMYU27 781154109 90555.00000000 NS USD 7269755.40000000 0.654928043321 Long EC CORP US N 1 N N N Simon Property Group Inc 529900GQL5X8H7AO3T64 828806109 48851.00000000 NS USD 10925526.15000000 0.984274307727 Long EC US N 1 N N N SiTime Corp 254900GGZVSCLLLYNB47 82982T106 12599.00000000 NS USD 9393310.44000000 0.846237883984 Long EC CORP US N 1 N N N Snowflake Inc 254900CJNSY1K7T53Z16 833445109 129490.00000000 NS USD 32955205.00000000 2.968915285364 Long EC CORP US N 1 N N N Sterling Infrastructure Inc 549300RZIK6K1215XU51 859241101 12268.00000000 NS USD 10297268.48000000 0.927674938989 Long EC CORP US N 1 N N N Take-Two Interactive Software Inc BOMSTHHJK882EWYX3334 874054109 81227.00000000 NS USD 20305125.46000000 1.829276963970 Long EC CORP US N 1 N N N Teledyne Technologies Inc 549300VSMO9KYQWDND94 879360105 14008.00000000 NS USD 9341935.20000000 0.841609518440 Long EC CORP US N 1 N N N Somnigroup International Inc 549300HFEKVR3US71V91 88023U101 92797.00000000 NS USD 7275284.80000000 0.655426183757 Long EC CORP US N 1 N N N Teradyne Inc C3X4YJ278QNZHRJULN75 880770102 49313.00000000 NS USD 23859601.92000000 2.149497684599 Long EC CORP US N 1 N N N Texas Roadhouse Inc 5299002Y1CNRPDGXTQ75 882681109 43095.00000000 NS USD 8327246.85000000 0.750196834095 Long EC CORP US N 1 N N N Tradeweb Markets Inc N/A 892672106 32986.00000000 NS USD 3287384.76000000 0.296158584443 Long EC CORP US N 1 N N N Twilio Inc 5493004W8TRGD63APX93 90138F102 32433.00000000 NS USD 6691900.89000000 0.602869466005 Long EC CORP US N 1 N N N Veeva Systems Inc 549300YZEXPDB92M2F02 922475108 49038.00000000 NS USD 8702773.86000000 0.784027844403 Long EC CORP US N 1 N N N Viavi Solutions Inc 5493006K3E3N1QOBF092 925550105 107664.00000000 NS USD 5140956.00000000 0.463145741311 Long EC CORP US N 1 N N N Vicor Corp 5299005KMQOTR6B51F09 925815102 21458.00000000 NS USD 8149319.24000000 0.734167439011 Long EC CORP US N 1 N N N Vistra Corp 549300KP43CPCUJOOG15 92840M102 57300.00000000 NS USD 9089499.00000000 0.818867687741 Long EC CORP US N 1 N N N Williams Cos Inc/The D71FAKCBLFS2O0RBPG08 969457100 162709.00000000 NS USD 12095787.06000000 1.089702433680 Long EC CORP US N 1 N N N Wynn Resorts Ltd 254900CEKKWIHTEAB172 983134107 64605.00000000 NS USD 6272499.45000000 0.565085833771 Long EC CORP US N 1 N N N Xenon Pharmaceuticals Inc 549300XV44Q9Z1MIPQ03 98420N105 80838.00000000 NS USD 4879381.68000000 0.439580662686 Long EC CORP CA N 1 N N N Credo Technology Group Holding Ltd N/A 000000000 25710.00000000 NS USD 6991834.50000000 0.629890310795 Long EC CORP KY N 1 N N N Dpc Holdings Ltd N/A 000000000 71249.00000000 NS USD 3495475.94000000 0.314905398036 Long EC CORP JE N 1 N N N Fabrinet 5493004TETZ6IYF7CV44 000000000 25654.00000000 NS USD 14419600.32000000 1.299053421117 Long EC CORP KY N 1 N N N FTAI Aviation Ltd N/A 000000000 48543.00000000 NS USD 13132337.79000000 1.183084687147 Long EC CORP KY N 1 N N N James Hardie Industries PLC 635400NSGXKTVOO7JU45 000000000 214931.00000000 NS USD 5626893.58000000 0.506923575768 Long EC CORP IE N 1 N N N TechnipFMC PLC 549300D5I93QWCJTCK36 000000000 128568.00000000 NS USD 8524058.40000000 0.767927472370 Long EC CORP GB N 1 N N N Trane Technologies PLC 549300BURLR9SLYY2705 000000000 18329.00000000 NS USD 9002471.64000000 0.811027443405 Long EC CORP IE N 1 N N N Viking Holdings Ltd 52990032GOPN7BVQMN13 000000000 113492.00000000 NS USD 11879207.64000000 1.070190919474 Long EC CORP BM N 1 N N N Garmin Ltd 2549001E0HIPIJQ0W046 000000000 3839.00000000 NS USD 911916.06000000 0.082153988406 Long EC CORP CH N 1 N N N JFrog Ltd 2549002N8E00AY49G567 000000000 105860.00000000 NS USD 9620556.80000000 0.866710376622 Long EC CORP IL N 1 N N N Innio NV 2549000WCDQX6ZM7AW92 000000000 246519.00000000 NS USD 9749826.45000000 0.878356204340 Long EC CORP DE N 1 N N N uniQure NV 724500RPCTZLFYJZ3S98 000000000 81346.00000000 NS USD 3746796.76000000 0.337546744798 Long EC CORP NL N 1 N N N Royal Caribbean Cruises Ltd K2NEH8QNVW44JIWK7Z55 000000000 54047.00000000 NS USD 17161543.91000000 1.546073527227 Long EC CORP LR N 1 N N N 2026-07-15 NORTHWESTERN MUTUAL SERIES FUND INC Linda Wisniewski Linda Wisniewski Controller and Chief Accounting Officer