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      <regZipOrPostalCode>53202</regZipOrPostalCode>
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      <seriesName>Large Cap Blend Portfolio</seriesName>
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        <balance>32821.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>4745588.39000000</valUSD>
        <pctVal>3.134307227870</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Berkshire Hathaway Inc</name>
        <lei>5493000C01ZX7D35SD85</lei>
        <title>Berkshire Hathaway Inc</title>
        <cusip>084670702</cusip>
        <identifiers>
          <isin value="US0846707026"/>
        </identifiers>
        <balance>50796.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>9067593.96000000</valUSD>
        <pctVal>5.988851740304</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Expeditors International of Washington Inc</name>
        <lei>984500B055A804AB6E40</lei>
        <title>Expeditors International of Washington Inc</title>
        <cusip>302130109</cusip>
        <identifiers>
          <isin value="US3021301094"/>
        </identifiers>
        <balance>47200.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>3589088.00000000</valUSD>
        <pctVal>2.370476226628</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Unilever PLC</name>
        <lei>549300MKFYEKVRWML317</lei>
        <title>Unilever PLC</title>
        <cusip>904767704</cusip>
        <identifiers>
          <isin value="US9047677045"/>
        </identifiers>
        <balance>105295.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>5778589.60000000</valUSD>
        <pctVal>3.816571025911</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>GB</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Booking Holdings Inc</name>
        <lei>FXM8FAOHMYDIPD38UZ17</lei>
        <title>Booking Holdings Inc</title>
        <cusip>09857L108</cusip>
        <identifiers>
          <isin value="US09857L1089"/>
        </identifiers>
        <balance>3622.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>5767455.48000000</valUSD>
        <pctVal>3.809217300740</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>PACCAR Inc</name>
        <lei>KDTEY8BWE486IKZ3CC07</lei>
        <title>PACCAR Inc</title>
        <cusip>693718108</cusip>
        <identifiers>
          <isin value="US6937181088"/>
        </identifiers>
        <balance>58505.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>4379099.25000000</valUSD>
        <pctVal>2.892253036474</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>PepsiCo Inc</name>
        <lei>FJSUNZKFNQ5YPJ5OT455</lei>
        <title>PepsiCo Inc</title>
        <cusip>713448108</cusip>
        <identifiers>
          <isin value="US7134481081"/>
        </identifiers>
        <balance>33038.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>4369605.88000000</valUSD>
        <pctVal>2.885982973467</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Chubb Ltd</name>
        <lei>E0JAN6VLUDI1HITHT809</lei>
        <title>Chubb Ltd</title>
        <cusip>000000000</cusip>
        <identifiers>
          <isin value="CH0044328745"/>
        </identifiers>
        <balance>43672.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>5529748.64000000</valUSD>
        <pctVal>3.652219641968</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>CH</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Dollar Tree Inc</name>
        <lei>549300PMSTQITB1WHR43</lei>
        <title>Dollar Tree Inc</title>
        <cusip>256746108</cusip>
        <identifiers>
          <isin value="US2567461080"/>
        </identifiers>
        <balance>58160.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>5390268.80000000</valUSD>
        <pctVal>3.560097731106</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Sony Corp</name>
        <lei>529900R5WX9N2OI2N910</lei>
        <title>Sony Corp</title>
        <cusip>835699307</cusip>
        <identifiers>
          <isin value="US8356993076"/>
        </identifiers>
        <balance>76715.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>5303307.95000000</valUSD>
        <pctVal>3.502662909900</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>JP</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Emerson Electric Co</name>
        <lei>FGLT0EWZSUIRRITFOA30</lei>
        <title>Emerson Electric Co</title>
        <cusip>291011104</cusip>
        <identifiers>
          <isin value="US2910111044"/>
        </identifiers>
        <balance>28355.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1758860.65000000</valUSD>
        <pctVal>1.161670417882</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <explntrNotes>
      <explntrNote note="Monthly returns presented in Item B.5(a) have been calculated without deducting any applicable sales loads or redemption fees." noteItem="B.5.a"/>
    </explntrNotes>
    <signature>
      <ncom:dateSigned>2020-07-27</ncom:dateSigned>
      <ncom:nameOfApplicant>NORTHWESTERN MUTUAL SERIES FUND INC</ncom:nameOfApplicant>
      <ncom:signature>Barbara Courtney</ncom:signature>
      <ncom:signerName>Barbara Courtney</ncom:signerName>
      <ncom:title>Controller and Chief Accounting Officer</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
