Form NPORT-P NORTHWESTERN MUTUAL SERI For: Mar 31

May 24, 2022 1:40 PM EDT

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      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
      2022-12-31
      2022-03-31
      N
    
    
      1221244136.36
      1753724.92
      1219490411.44
      0.00000000
      0.00000000
      0.00000000
      0.00000000
      0.00000000
      0.00000000
      0.00000000
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      0.00000000
      0.00000000
      0.00000000
      0.00000000
      0.00000000
      0.00000000
      N
      
        
          
        
        
        
        
      
      
      
      
      
    
    
      
        FMC Corp
        CKDHZ2X64EEBQCSP7013
        FMC Corp
        302491303
        
          
        
        71370.00000000
        NS
        USD
        9390150.90000000
        0.770006128126
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Hyatt Hotels Corp
        T27JQIMTYSH41TCD5186
        Hyatt Hotels Corp
        448579102
        
          
        
        79762.00000000
        NS
        USD
        7613282.90000000
        0.624300349439
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Fidelity National Financial Inc
        549300CAZYIH39SYQ287
        Fidelity National Financial Inc
        31620R303
        
          
        
        210976.00000000
        NS
        USD
        10304067.84000000
        0.844948655876
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Alnylam Pharmaceuticals Inc
        529900S3ZI14OWRJII50
        Alnylam Pharmaceuticals Inc
        02043Q107
        
          
        
        35051.00000000
        NS
        USD
        5723477.79000000
        0.469333562306
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        STORE Capital Corp
        5493004EA6C9IHDZ7N66
        STORE Capital Corp
        862121100
        
          
        
        309497.00000000
        NS
        USD
        9046597.31000000
        0.741834230522
        Long
        EC
        
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Expeditors International of Washington Inc
        984500B055A804AB6E40
        Expeditors International of Washington Inc
        302130109
        
          
        
        2398.00000000
        NS
        USD
        247377.68000000
        0.020285332109
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Redfin Corp
        549300HXWD3JEMZU3O57
        Redfin Corp
        75737F108
        
          
        
        182995.00000000
        NS
        USD
        3301229.80000000
        0.270705679112
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Exact Sciences Corp
        549300VM3X1FYD4N9Z14
        Exact Sciences Corp
        30063P105
        
          
        
        168049.00000000
        NS
        USD
        11749986.08000000
        0.963516069480
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Synaptics Inc
        549300AJ3LI4FWNRQX29
        Synaptics Inc
        87157D109
        
          
        
        80233.00000000
        NS
        USD
        16006483.50000000
        1.312555092671
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Hamilton Lane Inc
        5493006OKN3V1NORM833
        Hamilton Lane Inc
        407497106
        
          
        
        75409.00000000
        NS
        USD
        5828361.61000000
        0.477934189176
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Marathon Oil Corp
        1FRVQX2CRLGC1XLP5727
        Marathon Oil Corp
        565849106
        
          
        
        193714.00000000
        NS
        USD
        4864158.54000000
        0.398868125109
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        LiveRamp Holdings Inc
        254900GXS75LG1X7RF88
        LiveRamp Holdings Inc
        53815P108
        
          
        
        179678.00000000
        NS
        USD
        6718160.42000000
        0.550898994938
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Sage Therapeutics Inc
        5493000JX4BJS9W6CN35
        Sage Therapeutics Inc
        78667J108
        
          
        
        287857.00000000
        NS
        USD
        9528066.70000000
        0.781315425739
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Dun & Bradstreet Holdings Inc
        N/A
        Dun & Bradstreet Holdings Inc
        26484T106
        
          
        
        711684.00000000
        NS
        USD
        12468703.68000000
        1.022451965430
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Under Armour Inc
        549300D4549QKWETZ406
        Under Armour Inc
        904311206
        
          
        
        649144.00000000
        NS
        USD
        10100680.64000000
        0.828270607562
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Black Knight Inc
        549300TUSNXS3BFFML48
        Black Knight Inc
        09215C105
        
          
        
        83740.00000000
        NS
        USD
        4856082.60000000
        0.398205886200
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Prosperity Bancshares Inc
        N/A
        Prosperity Bancshares Inc
        743606105
        
          
        
        151900.00000000
        NS
        USD
        10538822.00000000
        0.864198840854
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Coterra Energy Inc
        FCNMH6O7VWU7LHXMK351
        Coterra Energy Inc
        127097103
        
          
        
        202559.00000000
        NS
        USD
        5463016.23000000
        0.447975332872
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Inari Medical Inc
        N/A
        Inari Medical Inc
        45332Y109
        
          
        
        124316.00000000
        NS
        USD
        11268002.24000000
        0.923992688609
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Lincoln Electric Holdings Inc
        BIMGBY40SIN95O01BN93
        Lincoln Electric Holdings Inc
        533900106
        
          
        
        105661.00000000
        NS
        USD
        14561142.41000000
        1.194035006212
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        State Street Global Advisors
        549300BZ5TGIFZUZDZ37
        State Street Institutional US Government Money Market Fund
        857492706
        
          
        
        1375525.31000000
        NS
        USD
        1375525.31000000
        0.112795090235
        Long
        STIV
        RF
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Apellis Pharmaceuticals Inc
        254900HS0ZFRXXSB9D42
        Apellis Pharmaceuticals Inc
        03753U106
        
          
        
        321661.00000000
        NS
        USD
        16343595.41000000
        1.340198763080
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        United Therapeutics Corp
        5299005C4HZL4UWROC14
        United Therapeutics Corp
        91307C102
        
          
        
        83718.00000000
        NS
        USD
        15019846.38000000
        1.231649403644
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        IDEX Corp
        549300U5Y5EL6PHYLF13
        IDEX Corp
        45167R104
        
          
        
        95485.00000000
        NS
        USD
        18307339.05000000
        1.501228617975
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        CDW Corp/DE
        9845001B052ABF0B6755
        CDW Corp/DE
        12514G108
        
          
        
        63515.00000000
        NS
        USD
        11362198.35000000
        0.931716907604
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Insulet Corp
        549300TZTYD2PYN92D43
        Insulet Corp
        45784P101
        
          
        
        20051.00000000
        NS
        USD
        5341385.89000000
        0.438001466833
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Olo Inc
        N/A
        Olo Inc
        68134L109
        
          
        
        294277.00000000
        NS
        USD
        3899170.25000000
        0.319737671852
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Targa Resources Corp
        5493003QENHHS261UR94
        Targa Resources Corp
        87612G101
        
          
        
        154702.00000000
        NS
        USD
        11675359.94000000
        0.957396616691
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Syneos Health Inc
        549300F1ZGKDS8P6GU13
        Syneos Health Inc
        87166B102
        
          
        
        134581.00000000
        NS
        USD
        10894331.95000000
        0.893351177491
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Axon Enterprise Inc
        549300QP2IEEGFE16681
        Axon Enterprise Inc
        05464C101
        
          
        
        89401.00000000
        NS
        USD
        12313199.73000000
        1.009700413753
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Iovance Biotherapeutics Inc
        549300220Z2GHH33XL82
        Iovance Biotherapeutics Inc
        462260100
        
          
        
        691453.00000000
        NS
        USD
        11512692.45000000
        0.944057644242
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Nevro Corp
        254900SH91I4BOYKUE38
        Nevro Corp
        64157F103
        
          
        
        71620.00000000
        NS
        USD
        5180274.60000000
        0.424790105063
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Teradata Corp
        549300JU9SOUHV4U4R71
        Teradata Corp
        88076W103
        
          
        
        368666.00000000
        NS
        USD
        18171547.14000000
        1.490093482452
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Black Hills Corp
        3MGELCRSTNSAMJ962671
        Black Hills Corp
        092113109
        
          
        
        125940.00000000
        NS
        USD
        9699898.80000000
        0.795405909632
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        M&T Bank Corp
        549300WYXDDBYRASEG81
        M&T Bank Corp
        55261F104
        
          
        
        94427.00000000
        NS
        USD
        16005376.50000000
        1.312464317050
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Integra LifeSciences Holdings Corp
        WB7IJCYY8YFTENS4O147
        Integra LifeSciences Holdings Corp
        457985208
        
          
        
        261475.00000000
        NS
        USD
        16802383.50000000
        1.377820058475
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        W R Berkley Corp
        SQOAGCLKBDWNVYV1OV80
        W R Berkley Corp
        084423102
        
          
        
        143064.00000000
        NS
        USD
        9526631.76000000
        0.781197758558
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Robert Half International Inc
        529900VPCUY9H3HLIC08
        Robert Half International Inc
        770323103
        
          
        
        41235.00000000
        NS
        USD
        4708212.30000000
        0.386080305005
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        TransUnion
        549300ZS772LUNUMRB03
        TransUnion
        89400J107
        
          
        
        50177.00000000
        NS
        USD
        5185291.18000000
        0.425201471971
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Guidewire Software Inc
        549300WXSG0J8IXZCK32
        Guidewire Software Inc
        40171V100
        
          
        
        119295.00000000
        NS
        USD
        11287692.90000000
        0.925607351571
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Etsy Inc
        54930089Q7XT501AEA40
        Etsy Inc
        29786A106
        
          
        
        107519.00000000
        NS
        USD
        13362461.32000000
        1.095741401051
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Steel Dynamics Inc
        549300HGGKEL4FYTTQ83
        Steel Dynamics Inc
        858119100
        
          
        
        222745.00000000
        NS
        USD
        18583615.35000000
        1.523883679253
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Shift4 Payments Inc
        N/A
        Shift4 Payments Inc
        82452J109
        
          
        
        196284.00000000
        NS
        USD
        12155868.12000000
        0.996798991280
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        First Republic Bank/CA
        YWC0TIKBQM2JV8L4IV08
        First Republic Bank/CA
        33616C100
        
          
        
        87439.00000000
        NS
        USD
        14173861.90000000
        1.162277437119
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Lamb Weston Holdings Inc
        5493005SMYID1D2OY946
        Lamb Weston Holdings Inc
        513272104
        
          
        
        222509.00000000
        NS
        USD
        13330514.19000000
        1.093121689596
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Reata Pharmaceuticals Inc
        5299005F094GH9QDDD80
        Reata Pharmaceuticals Inc
        75615P103
        
          
        
        173287.00000000
        NS
        USD
        5676882.12000000
        0.465512649115
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Life Storage Inc
        W9EE01AFDDF9DQCQZC68
        Life Storage Inc
        53223X107
        
          
        
        79827.00000000
        NS
        USD
        11210105.61000000
        0.919245080144
        Long
        EC
        
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Markel Corp
        549300SCNO12JLWIK605
        Markel Corp
        570535104
        
          
        
        14901.00000000
        NS
        USD
        21982551.24000000
        1.802601400862
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        First Citizens BancShares Inc/NC
        549300N3Z00ZHE2XC526
        First Citizens BancShares Inc/NC
        31946M103
        
          
        
        20188.00000000
        NS
        USD
        13437132.80000000
        1.101864571787
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Vizio Holding Corp
        N/A
        Vizio Holding Corp
        92858V101
        
          
        
        396619.00000000
        NS
        USD
        3525942.91000000
        0.289132483283
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Cargurus Inc
        54930027BKQN6B7X7G78
        Cargurus Inc
        141788109
        
          
        
        317340.00000000
        NS
        USD
        13474256.40000000
        1.104908761364
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        ICON PLC
        6354008SRQGEMC4XFI67
        ICON PLC
        000000000
        
          
        
        60534.00000000
        NS
        USD
        14723079.48000000
        1.207314083151
        Long
        EC
        CORP
        IE
        N
        
        1
        
          N
          N
          N
        
      
      
        Knight-Swift Transportation Holdings Inc
        N/A
        Knight-Swift Transportation Holdings Inc
        499049104
        
          
        
        216727.00000000
        NS
        USD
        10936044.42000000
        0.896771661130
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Arrival SA
        549300IID9QLI5KRBG37
        Arrival SA
        000000000
        
          
        
        694171.00000000
        NS
        USD
        2589257.83000000
        0.212322934703
        Long
        EC
        CORP
        LU
        N
        
        1
        
          N
          N
          N
        
      
      
        Silgan Holdings Inc
        KAF673KJXD92C8KSLU49
        Silgan Holdings Inc
        827048109
        
          
        
        258246.00000000
        NS
        USD
        11938712.58000000
        0.978991918919
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Lumentum Holdings Inc
        549300JLWRRC38DWEF52
        Lumentum Holdings Inc
        55024U109
        
          
        
        240606.00000000
        NS
        USD
        23483145.60000000
        1.925652336394
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        CommScope Holding Co Inc
        254900AW4CEPCQWSRI58
        CommScope Holding Co Inc
        20337X109
        
          
        
        1170200.00000000
        NS
        USD
        9221176.00000000
        0.756149938818
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        II-VI Inc
        549300O5C25A0MMHHU33
        II-VI Inc
        902104108
        
          
        
        412177.00000000
        NS
        USD
        29878710.73000000
        2.450098045028
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Nuvei Corp
        N/A
        Nuvei Corp
        67079A102
        
          
        
        57747.00000000
        NS
        USD
        4353546.33000000
        0.356997175964
        Long
        EC
        CORP
        CA
        N
        
        1
        
          N
          N
          N
        
      
      
        Flex Ltd
        549300EAQH74YHD07T53
        Flex Ltd
        000000000
        
          
        
        1156993.00000000
        NS
        USD
        21462220.15000000
        1.759933489321
        Long
        EC
        CORP
        SG
        
        N
        
        1
        
          N
          N
          N
        
      
      
        GFL Environmental Inc
        549300FYK4MBXWIVZU26
        GFL Environmental Inc
        36168Q104
        
          
        
        311473.00000000
        NS
        USD
        10135331.42000000
        0.831112022277
        Long
        EC
        CORP
        CA
        N
        
        1
        
          N
          N
          N
        
      
      
        Cable One Inc
        549300648QS85T0XSH18
        Cable One Inc
        12685J105
        
          
        
        11842.00000000
        NS
        USD
        17339530.08000000
        1.421866864826
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Erie Indemnity Co
        549300WA5KP94KRUFZ80
        Erie Indemnity Co
        29530P102
        
          
        
        8264.00000000
        NS
        USD
        1455538.32000000
        0.119356274255
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Watsco Inc
        549300F1Y3LN5BX5WN75
        Watsco Inc
        942622200
        
          
        
        33720.00000000
        NS
        USD
        10272460.80000000
        0.842356832299
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Middleby Corp/The
        JDFO86U9VQRBKW5KYA35
        Middleby Corp/The
        596278101
        
          
        
        45427.00000000
        NS
        USD
        7447302.38000000
        0.610689703677
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        YETI Holdings Inc
        549300DSQICIGNT5GO63
        YETI Holdings Inc
        98585X104
        
          
        
        261688.00000000
        NS
        USD
        15696046.24000000
        1.287098782635
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        NiSource Inc
        549300D8GOWWH0SJB189
        NiSource Inc
        65473P105
        
          
        
        199139.00000000
        NS
        USD
        6332620.20000000
        0.519284132174
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        F5 Inc
        54930015FPK9KT966303
        F5 Inc
        315616102
        
          
        
        126311.00000000
        NS
        USD
        26392683.45000000
        2.164238701871
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Bio-Techne Corp
        54930073RLKQ51TILZ35
        Bio-Techne Corp
        09073M104
        
          
        
        11422.00000000
        NS
        USD
        4946182.88000000
        0.405594241135
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Jazz Pharmaceuticals PLC
        635400GAUMJCLEZRRV50
        Jazz Pharmaceuticals PLC
        000000000
        
          
        
        157251.00000000
        NS
        USD
        24479263.17000000
        2.007335436208
        Long
        EC
        CORP
        IE
        
        N
        
        1
        
          N
          N
          N
        
      
      
        Molina Healthcare Inc
        549300NQQCEQ46YHZ591
        Molina Healthcare Inc
        60855R100
        
          
        
        28655.00000000
        NS
        USD
        9559021.45000000
        0.783853760581
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        CarMax Inc
        N/A
        CarMax Inc
        143130102
        
          
        
        116867.00000000
        NS
        USD
        11275328.16000000
        0.924593424780
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Cullen/Frost Bankers Inc
        529900V2E9G9AY665O34
        Cullen/Frost Bankers Inc
        229899109
        
          
        
        86767.00000000
        NS
        USD
        12009420.47000000
        0.984790069470
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Carter's Inc
        5299003WAQK4R3L3ZU36
        Carter's Inc
        146229109
        
          
        
        135291.00000000
        NS
        USD
        12445419.09000000
        1.020542594943
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Globe Life Inc
        5493001JFHKQOPP6XA71
        Globe Life Inc
        37959E102
        
          
        
        98866.00000000
        NS
        USD
        9945919.60000000
        0.815579975594
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        WEX Inc
        T9M5IGROL1TL1G5OV478
        WEX Inc
        96208T104
        
          
        
        166113.00000000
        NS
        USD
        29642864.85000000
        2.430758337410
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        NeoGenomics Inc
        N/A
        NeoGenomics Inc
        64049M209
        
          
        
        122329.00000000
        NS
        USD
        1486297.35000000
        0.121878559770
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        MKS Instruments Inc
        549300KEQATBHAGVF505
        MKS Instruments Inc
        55306N104
        
          
        
        133435.00000000
        NS
        USD
        20015250.00000000
        1.641279817556
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        JB Hunt Transport Services Inc
        549300XCD1MPI1C5GK90
        JB Hunt Transport Services Inc
        445658107
        
          
        
        63581.00000000
        NS
        USD
        12766428.99000000
        1.046865876946
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Ultragenyx Pharmaceutical Inc
        529900EV44GVDN1DCX77
        Ultragenyx Pharmaceutical Inc
        90400D108
        
          
        
        156795.00000000
        NS
        USD
        11386452.90000000
        0.933705816231
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Science Applications International Corp
        549300LZPNZIXQGZPZ48
        Science Applications International Corp
        808625107
        
          
        
        83037.00000000
        NS
        USD
        7653520.29000000
        0.627599874357
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Ingersoll Rand Inc
        5299004C02FMZCUOIR50
        Ingersoll Rand Inc
        45687V106
        
          
        
        451896.00000000
        NS
        USD
        22752963.60000000
        1.865776342852
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Credit Acceptance Corp
        N/A
        Credit Acceptance Corp
        225310101
        
          
        
        42319.00000000
        NS
        USD
        23291108.03000000
        1.909904974365
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        UGI Corp
        DX6GCWD4Q1JO9CRE5I40
        UGI Corp
        902681105
        
          
        
        460613.00000000
        NS
        USD
        16683402.86000000
        1.368063471716
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Silicon Laboratories Inc
        4PRDF8Q9TDHRVZKZSZ47
        Silicon Laboratories Inc
        826919102
        
          
        
        9456.00000000
        NS
        USD
        1420291.20000000
        0.116465958787
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        White Mountains Insurance Group Ltd
        549300N3FL068JERBG02
        White Mountains Insurance Group Ltd
        000000000
        
          
        
        8425.00000000
        NS
        USD
        9572822.00000000
        0.784985425895
        Long
        EC
        CORP
        BM
        
        N
        
        1
        
          N
          N
          N
        
      
      
        NVR Inc
        529900RWXR4JI3JYTV70
        NVR Inc
        62944T105
        
          
        
        4567.00000000
        NS
        USD
        20402022.09000000
        1.672995695465
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Choice Hotels International Inc
        5493003CYRY5RFGTIR97
        Choice Hotels International Inc
        169905106
        
          
        
        136073.00000000
        NS
        USD
        19289708.48000000
        1.581784350171
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Roku Inc
        549300KR6ITU0YIR1T71
        Roku Inc
        77543R102
        
          
        
        52067.00000000
        NS
        USD
        6522433.09000000
        0.534849067185
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        AMERCO
        5493003WIDMLDHYC6Y24
        AMERCO
        023586100
        
          
        
        22506.00000000
        NS
        USD
        13434731.64000000
        1.101667673150
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Lennox International Inc
        S7DWAC87RDMPBF77GJ92
        Lennox International Inc
        526107107
        
          
        
        59122.00000000
        NS
        USD
        15245198.92000000
        1.250128642011
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Builders FirstSource Inc
        549300W0SKP6L3H7DP63
        Builders FirstSource Inc
        12008R107
        
          
        
        133375.00000000
        NS
        USD
        8608022.50000000
        0.705870453695
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Chewy Inc
        N/A
        Chewy Inc
        16679L109
        
          
        
        209643.00000000
        NS
        USD
        8549241.54000000
        0.701050328875
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Teleflex Inc
        UUL85LWXB4NGSWWXIQ25
        Teleflex Inc
        879369106
        
          
        
        47981.00000000
        NS
        USD
        17025098.23000000
        1.396082992558
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        PS Business Parks Inc
        N/A
        PS Business Parks Inc
        69360J107
        
          
        
        32771.00000000
        NS
        USD
        5508149.68000000
        0.451676341882
        Long
        EC
        
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Informatica Inc
        N/A
        Informatica Inc
        45674M101
        
          
        
        371336.00000000
        NS
        USD
        7330172.64000000
        0.601084893430
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Rexford Industrial Realty Inc
        549300MSLO0DF0EMX355
        Rexford Industrial Realty Inc
        76169C100
        
          
        
        133437.00000000
        NS
        USD
        9953065.83000000
        0.816165976922
        Long
        EC
        
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        PTC Therapeutics Inc
        549300UJLWOIWFDGB318
        PTC Therapeutics Inc
        69366J200
        
          
        
        292905.00000000
        NS
        USD
        10928285.55000000
        0.896135422425
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Digital Turbine Inc
        549300D0WZR1VI2QGB24
        Digital Turbine Inc
        25400W102
        
          
        
        236340.00000000
        NS
        USD
        10354055.40000000
        0.849047709015
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Westinghouse Air Brake Technologies Corp
        06BTX5UWZD0GQ5N5Y745
        Westinghouse Air Brake Technologies Corp
        929740108
        
          
        
        145548.00000000
        NS
        USD
        13997351.16000000
        1.147803297893
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Q2 Holdings Inc
        549300M9RKR9DZXWS696
        Q2 Holdings Inc
        74736L109
        
          
        
        128837.00000000
        NS
        USD
        7942801.05000000
        0.651321320404
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Fair Isaac Corp
        RI6HET5SJUEY30V1PS26
        Fair Isaac Corp
        303250104
        
          
        
        10538.00000000
        NS
        USD
        4915555.48000000
        0.403082749473
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Graco Inc
        4T5VJ4S81BRT6Q7GGT78
        Graco Inc
        384109104
        
          
        
        96816.00000000
        NS
        USD
        6750011.52000000
        0.553510831793
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Genpact Ltd
        529900OSEC6Q0L4L5B35
        Genpact Ltd
        000000000
        
          
        
        590109.00000000
        NS
        USD
        25675642.59000000
        2.105440301058
        Long
        EC
        CORP
        BM
        
        N
        
        1
        
          N
          N
          N
        
      
      
        Element Solutions Inc
        549300FLGN6P5CU20J91
        Element Solutions Inc
        28618M106
        
          
        
        738245.00000000
        NS
        USD
        16167565.50000000
        1.325764052618
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        State Street Global Advisors
        549300BZ5TGIFZUZDZ37
        State Street Institutional US Government Money Market Fund
        857492706
        
          
        
        936700.69000000
        NS
        USD
        936700.69000000
        0.076810828622
        Long
        STIV
        RF
        US
        N
        
        1
        
          N
          N
          N
        
      
    
    
      
    
    
      2022-04-27
      NORTHWESTERN MUTUAL SERIES FUND INC
      Phillip Rinzel
      Phillip Rinzel
      Controller and Chief Accounting Officer
    
  
  XXXX



Mid Cap Growth Stock Portfolio

SCHEDULE OF INVESTMENTS

March 31, 2022 (unaudited)

 

Common Stocks

(99.8%)

  

Shares/

Par +

    

Value

$ (000’s)

 

Communication Services (3.1%)

 

Cable One, Inc.

     11,842        17,340  

CarGurus, Inc. *

     317,340        13,474  

Roku, Inc. *

     52,067        6,522  
     

 

 

 

Total

        37,336  
     

 

 

 

Consumer Discretionary (10.2%)

 

Arrival SA *

     694,171        2,589  

CarMax, Inc. *

     116,867        11,275  

Carter’s, Inc.

     135,291        12,445  

Chewy, Inc. *

     209,643        8,549  

Choice Hotels International, Inc.

     136,073        19,290  

Etsy, Inc. *

     107,519        13,363  

Hyatt Hotels Corp. - Class A *

     79,762        7,613  

NVR, Inc. *

     4,567        20,402  

Under Armour, Inc. - Class C *

     649,144        10,101  

Vizio Holding Corp. *

     396,619        3,526  

YETI Holdings, Inc. *

     261,688        15,696  
     

 

 

 

Total

          124,849  
     

 

 

 

Consumer Staples (1.1%)

 

Lamb Weston Holdings, Inc.

     222,509        13,331  
     

 

 

 

Total

        13,331  
     

 

 

 

Energy (1.8%)

     

Coterra Energy, Inc.

     202,559        5,463  

Marathon Oil Corp.

     193,714        4,864  

Targa Resources Corp.

     154,702        11,676  
     

 

 

 

Total

        22,003  
     

 

 

 

Financials (12.9%)

 

  

Credit Acceptance Corp. *

     42,319        23,291  

Cullen / Frost Bankers, Inc.

     86,767        12,009  

Erie Indemnity Co.

     7,964        1,403  

Fidelity National Financial, Inc.

     210,976        10,304  

First Citizens BancShares, Inc. - Class A

     20,188        13,437  

First Republic Bank

     87,439        14,174  

Globe Life, Inc.

     98,866        9,946  

Hamilton Lane, Inc.

     75,409        5,828  

M&T Bank Corp.

     94,427        16,005  

Markel Corp. *

     14,901        21,983  

Prosperity Bancshares, Inc.

     151,900        10,539  

W.R. Berkley Corp.

     143,064        9,527  

Common Stocks

(99.8%)

  

Shares/

Par +

    

Value

$ (000’s)

 

Financials continued

 

  

White Mountains Insurance Group, Ltd.

     8,425        9,573  
     

 

 

 

Total

          158,019  
     

 

 

 

Health Care (18.0%)

 

  

Alnylam Pharmaceuticals, Inc.*

     35,051        5,724  

Apellis Pharmaceuticals, Inc. *

     321,661        16,344  

Bio-Techne Corp.

     11,422        4,946  

Exact Sciences Corp. *

     168,049        11,750  

ICON PLC *

     60,534        14,723  

Inari Medical, Inc. *

     124,316        11,268  

Insulet Corp. *

     21,003        5,595  

Integra LifeSciences Holdings Corp. *

     261,475        16,802  

Iovance Biotherapeutics, Inc. *

     691,453        11,513  

Jazz Pharmaceuticals PLC *

     157,251        24,479  

Molina Healthcare, Inc. *

     28,655        9,559  

NeoGenomics, Inc. *

     104,629        1,271  

Nevro Corp. *

     71,620        5,180  

PTC Therapeutics, Inc. *

     292,905        10,928  

Reata Pharmaceuticals, Inc. *

     173,287        5,677  

Sage Therapeutics, Inc. *

     287,857        9,528  

Syneos Health, Inc. *

     134,581        10,894  

Teleflex, Inc.

     47,981        17,025  

Ultragenyx Pharmaceutical, Inc. *

     156,795        11,387  

United Therapeutics Corp. *

     83,718        15,020  
     

 

 

 

Total

          219,613  
     

 

 

 

Industrials (17.1%)

 

  

AMERCO

     22,506        13,435  

Axon Enterprise, Inc. *

     89,401        12,313  

Builders FirstSource, Inc. *

     133,375        8,608  

Dun & Bradstreet Holdings, Inc. *

     711,684        12,469  

Expeditors International of Washington, Inc.

     5,878        607  

Common Stocks

(99.8%)

  

Shares/

Par +

    

Value

$ (000’s)

 

Industrials continued

 

  

GFL Environmental, Inc.

     311,473        10,135  

Graco, Inc.

     96,816        6,750  

IDEX Corp.

     95,485        18,307  

Ingersoll-Rand, Inc.

     451,896        22,753  

J.B. Hunt Transport Services, Inc.

     63,581        12,767  

Knight-Swift Transportation Holdings, Inc.

     216,727        10,936  

Lennox International, Inc.

     59,122        15,245  

Lincoln Electric Holdings, Inc.

     105,661        14,561  

The Middleby Corp. *

     45,427        7,447  

Robert Half International, Inc.

     41,235        4,708  

Science Applications International Corp.

     83,037        7,654  

TransUnion

     50,177        5,185  

Watsco, Inc.

     33,720        10,273  

Westinghouse Air Brake Technologies Corp.

     145,548        13,997  
     

 

 

 

Total

          208,150  
     

 

 

 

Information Technology (25.1%)

 

Black Knight, Inc. *

     83,740        4,856  

CDW Corp.

     63,515        11,362  

CommScope Holding Co., Inc. *

     1,170,200        9,221  

Digital Turbine, Inc. *

     236,340        10,354  

F5, Inc. *

     126,311        26,393  

Fair Isaac Corp. *

     10,538        4,916  

Flex, Ltd. *

     1,156,993        21,462  

Genpact, Ltd.

     590,109        25,676  

Guidewire Software, Inc. *

     119,295        11,288  

II-VI, Inc. *

     412,177        29,879  

Informatica, Inc. *

     371,336        7,330  

LiveRamp Holdings, Inc. *

     179,678        6,718  

Lumentum Holdings, Inc. *

     240,606        23,483  

MKS Instruments, Inc.

     133,435        20,015  

Nuvei Corp. *

     57,747        4,353  

Olo, Inc. *

     294,277        3,899  

Q2 Holdings, Inc. *

     128,837        7,943  

Shift4 Payments, Inc. *

     196,284        12,156  

Silicon Laboratories, Inc. *

     8,137        1,222  

Synaptics, Inc. *

     80,233        16,006  

Teradata Corp. *

     368,666        18,172  
 


Mid Cap Growth Stock Portfolio

 

Common Stocks
(99.8%)
  

Shares/

Par +

    

Value

$ (000’s)

 

Information Technology continued

 

WEX, Inc. *

     166,113        29,643  
     

 

 

 

Total

          306,347  
     

 

 

 

Materials (4.6%)

     

Element Solutions, Inc.

     738,245        16,167  

FMC Corp.

     71,370        9,390  

Silgan Holdings, Inc.

     258,246        11,939  

Steel Dynamics, Inc.

     222,745        18,584  
     

 

 

 

Total

        56,080  
     

 

 

 

Real Estate (3.2%)

     

Life Storage, Inc.

     79,827        11,210  

PS Business Parks, Inc.

     32,771        5,508  

Redfin Corp. *

     182,995        3,301  

Rexford Industrial Realty, Inc.

     130,647        9,745  

STORE Capital Corp.

     309,497        9,047  
     

 

 

 

Total

        38,811  
     

 

 

 

Utilities (2.7%)

     

Black Hills Corp.

     125,940        9,700  

NiSource, Inc.

     199,139        6,333  

UGI Corp.

     460,613        16,683  
     

 

 

 

Total

        32,716  
     

 

 

 

Total Common Stocks
(Cost: $1,061,878)

 

     1,217,255  
     

 

 

 

Short-Term

Investments (0.2%)

               

Money Market Funds (0.2%)

 

  

State Street Institutional U.S. Government Money Market Fund - Premier Class 0.250% #

     2,312,226        2,312  
     

 

 

 

Total

        2,312  
     

 

 

 

Total Short-Term Investments
(Cost: $2,312)

 

     2,312  
     

 

 

 

Total Investments (100.0%)
(Cost: $1,064,190)@

 

     1,219,567  
     

 

 

 

Other Assets, Less
Liabilities (0.0%)

 

     (502)  
     

 

 

 

Net Assets (100.0%)

 

     1,219,065  
     

 

 

 

        

    

 


Mid Cap Growth Stock Portfolio

 

+

All par is stated in U.S. Dollar unless otherwise noted.

*

Non income producing

#

7-Day yield as of 3/31/2022.

@

At March 31, 2022, the aggregate cost of investments, including derivatives, for federal tax purposes (in thousands) was $1,064,190 and the net unrealized appreciation of investments based on that cost was $155,377 which is comprised of $244,467 aggregate gross unrealized appreciation and $89,090 aggregate gross unrealized depreciation. Because tax adjustments are calculated annually, these amounts do not reflect tax adjustments. For the previous fiscal year’s federal income tax information, please refer to the Notes to the Financial Statements section in the Portfolio’s most recent annual report.

The Fair Value Measurements and Disclosures Topic of the FASB Accounting Standards Codification defines fair value as the price that a Fund would receive to sell an asset or pay to transfer a liability in an orderly transaction between market participants at the measurement date. It establishes and requires disclosure of a fair value hierarchy, separately for each major category of asset and liability, which segregates fair value measurements into levels. A summary of the fair value hierarchy is described below:

Level 1 - fair value is determined by unadjusted quoted prices in active markets for identical securities or derivatives

Level 2 - fair value is determined by other significant observable inputs

Level 3 - fair value is determined by significant unobservable inputs

The categorization of a value determined for a financial instrument within the hierarchy is based upon the pricing transparency of the instrument and does not necessarily correspond to the Portfolio’s perceived risk of that instrument.

The following is a summary of the inputs used in valuing the Portfolio’s Investments at March 31, 2022.

 

            Valuation Inputs       
  

 

 

 

Description           

Level 1 - Quoted

Prices

    

Level 2 - Other

Significant

Observable Inputs

      

Level 3    

- Significant    

Unobservable    

Inputs    

         

(Amounts in thousands)

 

Assets:

                 

Common Stocks

        $ 1,217,255        $        $  

Short-Term Investments

          2,312                    
       

 

 

 

Total Assets:

        $ 1,219,567        $        $  
       

 

 

 


Abbreviations

 

Abbreviations that may be used in the preceding statements

 

ADR

   American Depositary Receipt

AFC

   Available Funds Cap security - Security accrues interest at an assumed or uncapped rate. If the interest rate on the underlying loans is lower than the uncapped rate, then the security will pay at the lower rate.

CSTR

   Collateral Strip Rate security - interest is based on the weighted net interest rate of the collateral.

EXE

   Security receives collateral principal and interest paid which exceeds the amount of principal and income obligated to all bonds in the deal.

IO

   Interest Only Security

PO

   Principal Only Security

GDR

   Global Depositary Receipt

GO

   General Obligation

RB

   Revenue Bond

CPURNSA

   U.S. Consumer Price Index - All Urban Consumers - Not Seasonally Adjusted

LIBOR

   London Interbank Offered Rate

SOFR

   Secured Overnight Financing Rate

ICE

   Intercontinental Exchange

SONIO

   Sterling Overnight Interbank Average Rate

DAC

   Designated Activity Company

TBA

   To Be Announced

OIS

   Overnight Index Swaps

DIFC

   Dubai International Financial Centre

EURIBOR

   Euro Interbank Offered Rate

SDR

   Swedish Depository Receipt

ETF

   Exchange Traded Fund
Currency Abbreviations

ARS

   Argentine Peso

AUD

   Australian Dollar

BRL

   Brazilian Real

CAD

   Canadian Dollar

CHF

   Swiss Franc

CNH

   Chinese Yuan Renminbi - Offshore

CNY

   Chinese Yuan Renminbi

DKK

   Danish Krone

EUR

   Euro

GBP

   British Pound

HKD

   Hong Kong Dollar

IDR

   Indonesian Rupiah

INR

   Indian Rupee

JPY

   Japanese Yen

KES

   Kenyan Shilling

KRW

   South Korean Won

MXN

   Mexican New Peso

NOK

   Norwegian Krone

NZD

   New Zealand Dollar

PHP

   Philippines Peso

PLN

   Polish Zloty

RUB

   Russian Ruble

SEK

   Swedish Krona
THB    Thai Baht
TWD    Taiwan Dollar
USD    United States Dollar
ZAR    South African Rand


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