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		<filerInfo>

			<filer>
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					<ccc>XXXXXXXX</ccc>
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			<regName>MASSMUTUAL SELECT FUNDS</regName>
			<regFileNumber>811-08274</regFileNumber>
			<regCik>0000916053</regCik>
			<regLei>PJVR01EN4PJWVNUIQ236</regLei>
			<regStreet1>100 BRIGHT MEADOW BLVD.</regStreet1>
			<regCity>ENFIELD</regCity>
			<regStateConditional regCountry="US" regState="US-CT"/>
			<regZipOrPostalCode>06082-1981</regZipOrPostalCode>
			<regPhone>8605621000</regPhone>
			<seriesName>MassMutual Select Growth Opportunities Fund</seriesName>
			<seriesId>S000003656</seriesId>
			<seriesLei>549300B6PINPSEC9ND74</seriesLei>
			<repPdEnd>2020-09-30</repPdEnd>
			<repPdDate>2020-03-31</repPdDate>
			<isFinalFiling>N</isFinalFiling>
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			<totLiabs>17072287.82</totLiabs>
			<netAssets>400781559.63</netAssets>
			<assetsAttrMiscSec>0</assetsAttrMiscSec>
			<assetsInvested>0</assetsInvested>
			<amtPayOneYrBanksBorr>0</amtPayOneYrBanksBorr>
			<amtPayOneYrCtrldComp>0</amtPayOneYrCtrldComp>
			<amtPayOneYrOthAffil>0</amtPayOneYrOthAffil>
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			<amtPayAftOneYrOther>0</amtPayAftOneYrOther>
			<delayDeliv>0</delayDeliv>
			<standByCommit>0</standByCommit>
			<liquidPref>0</liquidPref>
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				<monthlyReturnCats/>
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				<othMon2 netRealizedGain="8215978.3" netUnrealizedAppr="-33720040.04"/>
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				<isRestrictedSec>N</isRestrictedSec>

				<fairValLevel>1</fairValLevel>
				<securityLending>
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				<isRestrictedSec>N</isRestrictedSec>

				<fairValLevel>1</fairValLevel>
				<securityLending>
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					<ticker value="BABA"/>
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				<invCountry>KY</invCountry>

				<isRestrictedSec>N</isRestrictedSec>

				<fairValLevel>1</fairValLevel>
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				<isRestrictedSec>N</isRestrictedSec>

				<fairValLevel>1</fairValLevel>
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				<invCountry>US</invCountry>

				<isRestrictedSec>N</isRestrictedSec>

				<fairValLevel>1</fairValLevel>
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				<assetCat>EC</assetCat>
				<issuerCat>CORP</issuerCat>
				<invCountry>US</invCountry>

				<isRestrictedSec>N</isRestrictedSec>

				<fairValLevel>1</fairValLevel>
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				<isRestrictedSec>N</isRestrictedSec>

				<fairValLevel>1</fairValLevel>
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				<isRestrictedSec>N</isRestrictedSec>

				<fairValLevel>1</fairValLevel>
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				<invCountry>GB</invCountry>

				<isRestrictedSec>N</isRestrictedSec>

				<fairValLevel>1</fairValLevel>
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				<invCountry>US</invCountry>

				<isRestrictedSec>N</isRestrictedSec>

				<fairValLevel>1</fairValLevel>
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				<isRestrictedSec>N</isRestrictedSec>

				<fairValLevel>1</fairValLevel>
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				<assetCat>EC</assetCat>
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				<invCountry>US</invCountry>

				<isRestrictedSec>N</isRestrictedSec>

				<fairValLevel>1</fairValLevel>
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				<lei>LCZ7XYGSLJUHFXXNXD88</lei>
				<title>COMMON STOCK USD.01</title>
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					<other otherDesc="SEDOL Number" value="2965839"/>
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				<curCd>USD</curCd>
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				<assetCat>EC</assetCat>
				<issuerCat>CORP</issuerCat>
				<invCountry>US</invCountry>

				<isRestrictedSec>N</isRestrictedSec>

				<fairValLevel>1</fairValLevel>
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				<name>COSTAR GROUP INC</name>
				<lei>N/A</lei>
				<title>COMMON STOCK USD.01</title>
				<cusip>22160N109</cusip>
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					<ticker value="CSGP"/>
					<other otherDesc="SEDOL Number" value="2262864"/>
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				<assetCat>EC</assetCat>
				<issuerCat>CORP</issuerCat>
				<invCountry>US</invCountry>

				<isRestrictedSec>N</isRestrictedSec>

				<fairValLevel>1</fairValLevel>
				<securityLending>
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					<isNonCashCollateral>N</isNonCashCollateral>
					<isLoanByFund>N</isLoanByFund>
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			</invstOrSec>
			<invstOrSec>
				<name>COUPA SOFTWARE INC</name>
				<lei>549300Q95ICR2GFL2K37</lei>
				<title>COMMON STOCK USD.0001</title>
				<cusip>22266L106</cusip>
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					<isin value="US22266L1061"/>
					<ticker value="COUP"/>
					<other otherDesc="SEDOL Number" value="BD87XR1"/>
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				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>3048629.14</valUSD>
				<pctVal>0.7606710106</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>
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			<invstOrSec>
				<name>DEXCOM INC</name>
				<lei>549300YSK3QDSFR5EU59</lei>
				<title>COMMON STOCK USD.001</title>
				<cusip>252131107</cusip>
				<identifiers>
					<isin value="US2521311074"/>
					<ticker value="DXCM"/>
					<other otherDesc="SEDOL Number" value="B0796X4"/>
				</identifiers>
				<balance>6940</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>1868733.8</valUSD>
				<pctVal>0.4662724008</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>DOMINO S PIZZA INC</name>
				<lei>5299004V0Y8MI5D9FF45</lei>
				<title>COMMON STOCK USD.01</title>
				<cusip>25754A201</cusip>
				<identifiers>
					<isin value="US25754A2015"/>
					<ticker value="DPZ"/>
					<other otherDesc="SEDOL Number" value="B01SD70"/>
				</identifiers>
				<balance>18054</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>5850759.78</valUSD>
				<pctVal>1.4598375697</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>EDWARDS LIFESCIENCES CORP</name>
				<lei>YA13X31F3V31L8TMPR58</lei>
				<title>COMMON STOCK USD1.0</title>
				<cusip>28176E108</cusip>
				<identifiers>
					<isin value="US28176E1082"/>
					<ticker value="EW"/>
					<other otherDesc="SEDOL Number" value="2567116"/>
				</identifiers>
				<balance>24500</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>4621190</valUSD>
				<pctVal>1.1530445673</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>FACEBOOK INC CLASS A</name>
				<lei>BQ4BKCS1HXDV9HN80Z93</lei>
				<title>COMMON STOCK USD.000006</title>
				<cusip>30303M102</cusip>
				<identifiers>
					<isin value="US30303M1027"/>
					<ticker value="FB"/>
					<other otherDesc="SEDOL Number" value="B7TL820"/>
				</identifiers>
				<balance>51357</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>8566347.6</valUSD>
				<pctVal>2.1374106154</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>FLOOR + DECOR HOLDINGS INC A</name>
				<lei>549300M5FR3N688XGQ36</lei>
				<title>COMMON STOCK USD.001</title>
				<cusip>339750101</cusip>
				<identifiers>
					<isin value="US3397501012"/>
					<ticker value="FND"/>
					<other otherDesc="SEDOL Number" value="BYQHP96"/>
				</identifiers>
				<balance>97300</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>3122357</valUSD>
				<pctVal>0.7790670316</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>
					<loanByFundCondition isLoanByFund="Y" loanVal="636826.05"/>
				</securityLending>
			</invstOrSec>
			<invstOrSec>
				<name>ILLUMINA INC</name>
				<lei>SQ95QG8SR5Q56LSNF682</lei>
				<title>COMMON STOCK USD.01</title>
				<cusip>452327109</cusip>
				<identifiers>
					<isin value="US4523271090"/>
					<ticker value="ILMN"/>
					<other otherDesc="SEDOL Number" value="2613990"/>
				</identifiers>
				<balance>45318</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>12377252.16</valUSD>
				<pctVal>3.0882788548</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>INTUIT INC</name>
				<lei>VI90HBPH7XSFMB9E4M29</lei>
				<title>COMMON STOCK USD.01</title>
				<cusip>461202103</cusip>
				<identifiers>
					<isin value="US4612021034"/>
					<ticker value="INTU"/>
					<other otherDesc="SEDOL Number" value="2459020"/>
				</identifiers>
				<balance>40150</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>9234500</valUSD>
				<pctVal>2.3041229762</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>INTUITIVE SURGICAL INC</name>
				<lei>54930052SRG011710797</lei>
				<title>COMMON STOCK USD.001</title>
				<cusip>46120E602</cusip>
				<identifiers>
					<isin value="US46120E6023"/>
					<ticker value="ISRG"/>
					<other otherDesc="SEDOL Number" value="2871301"/>
				</identifiers>
				<balance>4622</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>2288860.62</valUSD>
				<pctVal>0.5710992846</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>IQVIA HOLDINGS INC</name>
				<lei>549300W3R20NM4KQPH86</lei>
				<title>COMMON STOCK USD.01</title>
				<cusip>46266C105</cusip>
				<identifiers>
					<isin value="US46266C1053"/>
					<ticker value="IQV"/>
					<other otherDesc="SEDOL Number" value="BDR73G1"/>
				</identifiers>
				<balance>81636</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>8805258.96</valUSD>
				<pctVal>2.1970219808</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>KKR + CO INC  A</name>
				<lei>549300JOHU21WRN2Z451</lei>
				<title>COMMON STOCK</title>
				<cusip>48251W104</cusip>
				<identifiers>
					<isin value="US48251W1045"/>
					<ticker value="KKR"/>
					<other otherDesc="SEDOL Number" value="BG1FRR1"/>
				</identifiers>
				<balance>285503</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>6700755.41</valUSD>
				<pctVal>1.6719220855</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>MASTERCARD INC   A</name>
				<lei>AR5L2ODV9HN37376R084</lei>
				<title>COMMON STOCK USD.0001</title>
				<cusip>57636Q104</cusip>
				<identifiers>
					<isin value="US57636Q1040"/>
					<ticker value="MA"/>
					<other otherDesc="SEDOL Number" value="B121557"/>
				</identifiers>
				<balance>30726</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>7422172.56</valUSD>
				<pctVal>1.8519246661</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>MATCH GROUP INC</name>
				<lei>549300BIJKT86CPCKK96</lei>
				<title>COMMON STOCK USD.001</title>
				<cusip>57665R106</cusip>
				<identifiers>
					<isin value="US57665R1068"/>
					<ticker value="MTCH"/>
					<other otherDesc="SEDOL Number" value="BYT5JW8"/>
				</identifiers>
				<balance>158467</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>10465160.68</valUSD>
				<pctVal>2.6111881718</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>
					<loanByFundCondition isLoanByFund="Y" loanVal="10358241.92"/>
				</securityLending>
			</invstOrSec>
			<invstOrSec>
				<name>MICROSOFT CORP</name>
				<lei>INR2EJN1ERAN0W5ZP974</lei>
				<title>COMMON STOCK USD.00000625</title>
				<cusip>594918104</cusip>
				<identifiers>
					<isin value="US5949181045"/>
					<ticker value="MSFT"/>
					<other otherDesc="SEDOL Number" value="2588173"/>
				</identifiers>
				<balance>200096</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>31557140.16</valUSD>
				<pctVal>7.8739002336</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>MIRATI THERAPEUTICS INC</name>
				<lei>529900GYRW59IDQV6N54</lei>
				<title>COMMON STOCK</title>
				<cusip>60468T105</cusip>
				<identifiers>
					<isin value="US60468T1051"/>
					<ticker value="MRTX"/>
					<other otherDesc="SEDOL Number" value="BBPK0J0"/>
				</identifiers>
				<balance>29750</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>2286882.5</valUSD>
				<pctVal>0.570605719</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>
					<loanByFundCondition isLoanByFund="Y" loanVal="2263975.24"/>
				</securityLending>
			</invstOrSec>
			<invstOrSec>
				<name>MONSTER BEVERAGE CORP</name>
				<lei>52990090AP0E7HCB6F33</lei>
				<title>COMMON STOCK</title>
				<cusip>61174X109</cusip>
				<identifiers>
					<isin value="US61174X1090"/>
					<ticker value="MNST"/>
					<other otherDesc="SEDOL Number" value="BZ07BW4"/>
				</identifiers>
				<balance>84900</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>4776474</valUSD>
				<pctVal>1.1917898629</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>NETFLIX INC</name>
				<lei>549300Y7VHGU0I7CE873</lei>
				<title>COMMON STOCK USD.001</title>
				<cusip>64110L106</cusip>
				<identifiers>
					<isin value="US64110L1061"/>
					<ticker value="NFLX"/>
					<other otherDesc="SEDOL Number" value="2857817"/>
				</identifiers>
				<balance>61880</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>23235940</valUSD>
				<pctVal>5.7976569634</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>NIKE INC  CL B</name>
				<lei>787RXPR0UX0O0XUXPZ81</lei>
				<title>COMMON STOCK</title>
				<cusip>654106103</cusip>
				<identifiers>
					<isin value="US6541061031"/>
					<ticker value="NKE"/>
					<other otherDesc="SEDOL Number" value="2640147"/>
				</identifiers>
				<balance>35472</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>2934953.28</valUSD>
				<pctVal>0.7323074651</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>PAYPAL HOLDINGS INC</name>
				<lei>5493005X2GO78EFZ3E94</lei>
				<title>COMMON STOCK USD.0001</title>
				<cusip>70450Y103</cusip>
				<identifiers>
					<isin value="US70450Y1038"/>
					<ticker value="PYPL"/>
					<other otherDesc="SEDOL Number" value="BYW36M8"/>
				</identifiers>
				<balance>75420</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>7220710.8</valUSD>
				<pctVal>1.8016574432</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>Repurchase Agreement</name>
				<lei>549300H47WTHXPU08X20</lei>
				<title>FIXED INC CLEARING CORP.REPO</title>
				<cusip>85748R009</cusip>
				<identifiers>
					<isin value="US85748R0096"/>
				</identifiers>
				<balance>7532688.54</balance>
				<units>PA</units>
				<curCd>USD</curCd>
				<valUSD>7532688.54</valUSD>
				<pctVal>1.8794997821</pctVal>
				<payoffProfile>Long</payoffProfile>
				<assetCat>RA</assetCat>
				<issuerCat>CORP</issuerCat>
				<invCountry>US</invCountry>

				<isRestrictedSec>N</isRestrictedSec>

				<fairValLevel>1</fairValLevel>
				<repurchaseAgrmt>
					<transCat>Repurchase</transCat>
					<notClearedCentCparty isCleared="N">
						<counterpartyInfos>
							<counterpartyInfo lei="549300H47WTHXPU08X20" name="Fixed Income Clearing Corp."/>
						</counterpartyInfos>
					</notClearedCentCparty>
					<isTriParty>N</isTriParty>
					<repurchaseRt>0</repurchaseRt>
					<maturityDt>2020-04-01</maturityDt>
					<repurchaseCollaterals>
						<repurchaseCollateral>
							<principalAmt>7400000</principalAmt>
							<principalCd>USD</principalCd>
							<collateralVal>7690137.51</collateralVal>
							<collateralCd>USD</collateralCd>
							<invstCat>UST</invstCat>
						</repurchaseCollateral>
					</repurchaseCollaterals>
				</repurchaseAgrmt>
				<securityLending>
					<isCashCollateral>N</isCashCollateral>
					<isNonCashCollateral>N</isNonCashCollateral>
					<isLoanByFund>N</isLoanByFund>
				</securityLending>
			</invstOrSec>
			<invstOrSec>
				<name>SALESFORCE.COM INC</name>
				<lei>RCGZFPDMRW58VJ54VR07</lei>
				<title>COMMON STOCK USD.001</title>
				<cusip>79466L302</cusip>
				<identifiers>
					<isin value="US79466L3024"/>
					<ticker value="CRM"/>
					<other otherDesc="SEDOL Number" value="2310525"/>
				</identifiers>
				<balance>25034</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>3604395.32</valUSD>
				<pctVal>0.8993416073</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>SAREPTA THERAPEUTICS INC</name>
				<lei>549300IKDPIED8J8IG21</lei>
				<title>COMMON STOCK USD.0001</title>
				<cusip>803607100</cusip>
				<identifiers>
					<isin value="US8036071004"/>
					<ticker value="SRPT"/>
					<other otherDesc="SEDOL Number" value="B8DPDT7"/>
				</identifiers>
				<balance>27305</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>2670975.1</valUSD>
				<pctVal>0.6664416153</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>
					<loanByFundCondition isLoanByFund="Y" loanVal="2644172.42"/>
				</securityLending>
			</invstOrSec>
			<invstOrSec>
				<name>SCHWAB (CHARLES) CORP</name>
				<lei>549300VSGCJ7E698NM85</lei>
				<title>COMMON STOCK USD.01</title>
				<cusip>808513105</cusip>
				<identifiers>
					<isin value="US8085131055"/>
					<ticker value="SCHW"/>
					<other otherDesc="SEDOL Number" value="2779397"/>
				</identifiers>
				<balance>158595</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>5331963.9</valUSD>
				<pctVal>1.3303915242</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>SEA LTD ADR</name>
				<lei>529900OM6JLLW44YKI15</lei>
				<title>ADR</title>
				<cusip>81141R100</cusip>
				<identifiers>
					<isin value="US81141R1005"/>
					<ticker value="SE"/>
					<other otherDesc="SEDOL Number" value="BYWD7L4"/>
				</identifiers>
				<balance>109200</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>4838652</valUSD>
				<pctVal>1.2073040497</pctVal>
				<payoffProfile>Long</payoffProfile>
				<assetCat>EC</assetCat>
				<issuerCat>CORP</issuerCat>
				<invCountry>KY</invCountry>

				<isRestrictedSec>N</isRestrictedSec>

				<fairValLevel>1</fairValLevel>
				<securityLending>
					<isCashCollateral>N</isCashCollateral>
					<isNonCashCollateral>N</isNonCashCollateral>
					<isLoanByFund>N</isLoanByFund>
				</securityLending>
			</invstOrSec>
			<invstOrSec>
				<name>SERVICENOW INC</name>
				<lei>549300HJTQM36M0E1G39</lei>
				<title>COMMON STOCK USD.001</title>
				<cusip>81762P102</cusip>
				<identifiers>
					<isin value="US81762P1021"/>
					<ticker value="NOW"/>
					<other otherDesc="SEDOL Number" value="B80NXX8"/>
				</identifiers>
				<balance>67329</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>19295144.82</valUSD>
				<pctVal>4.8143793936</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>SQUARE INC   A</name>
				<lei>549300OHIIUWSTIZME52</lei>
				<title>COMMON STOCK USD.000001</title>
				<cusip>852234103</cusip>
				<identifiers>
					<isin value="US8522341036"/>
					<ticker value="SQ"/>
					<other otherDesc="SEDOL Number" value="BYNZGK1"/>
				</identifiers>
				<balance>72700</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>3808026</valUSD>
				<pctVal>0.9501500028</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>State Street Navigator Securities Lending Trust</name>
				<lei>5493005HD34MZLK62085</lei>
				<title>Prime Portfolio</title>
				<cusip>638995910</cusip>
				<identifiers>
					<isin value="US6389959106"/>
				</identifiers>
				<balance>12099759.75</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>12099759.75</valUSD>
				<pctVal>3.019041036</pctVal>
				<payoffProfile>Long</payoffProfile>
				<assetCat>STIV</assetCat>
				<issuerCat>RF</issuerCat>
				<invCountry>US</invCountry>

				<isRestrictedSec>N</isRestrictedSec>

				<fairValLevel>1</fairValLevel>
				<securityLending>
					<cashCollateralCondition cashCollateralVal="12099759.75" isCashCollateral="Y"/>
					<isNonCashCollateral>N</isNonCashCollateral>
					<isLoanByFund>N</isLoanByFund>
				</securityLending>
			</invstOrSec>
			<invstOrSec>
				<name>TAKE TWO INTERACTIVE SOFTWRE</name>
				<lei>BOMSTHHJK882EWYX3334</lei>
				<title>COMMON STOCK USD.01</title>
				<cusip>874054109</cusip>
				<identifiers>
					<isin value="US8740541094"/>
					<ticker value="TTWO"/>
					<other otherDesc="SEDOL Number" value="2122117"/>
				</identifiers>
				<balance>39453</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>4679520.33</valUSD>
				<pctVal>1.1675987125</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>TWILIO INC   A</name>
				<lei>5493004W8TRGD63APX93</lei>
				<title>COMMON STOCK USD.001</title>
				<cusip>90138F102</cusip>
				<identifiers>
					<isin value="US90138F1021"/>
					<ticker value="TWLO"/>
					<other otherDesc="SEDOL Number" value="BD6P5Q0"/>
				</identifiers>
				<balance>76184</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>6817706.16</valUSD>
				<pctVal>1.7011027569</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>
					<loanByFundCondition isLoanByFund="Y" loanVal="3766902.57"/>
				</securityLending>
			</invstOrSec>
			<invstOrSec>
				<name>UBER TECHNOLOGIES INC</name>
				<lei>549300B2FTG34FILDR98</lei>
				<title>COMMON STOCK USD.00001</title>
				<cusip>90353T100</cusip>
				<identifiers>
					<isin value="US90353T1007"/>
					<ticker value="UBER"/>
					<other otherDesc="SEDOL Number" value="BK6N347"/>
				</identifiers>
				<balance>308835</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>8622673.2</valUSD>
				<pctVal>2.1514645554</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>UNITEDHEALTH GROUP INC</name>
				<lei>549300GHBMY8T5GXDE41</lei>
				<title>COMMON STOCK USD.01</title>
				<cusip>91324P102</cusip>
				<identifiers>
					<isin value="US91324P1021"/>
					<ticker value="UNH"/>
					<other otherDesc="SEDOL Number" value="2917766"/>
				</identifiers>
				<balance>30829</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>7688136.02</valUSD>
				<pctVal>1.918285868</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>VISA INC CLASS A SHARES</name>
				<lei>549300JZ4OKEHW3DPJ59</lei>
				<title>COMMON STOCK USD.0001</title>
				<cusip>92826C839</cusip>
				<identifiers>
					<isin value="US92826C8394"/>
					<ticker value="V"/>
					<other otherDesc="SEDOL Number" value="B2PZN04"/>
				</identifiers>
				<balance>159556</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>25707662.72</valUSD>
				<pctVal>6.4143826237</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>
					<loanByFundCondition isLoanByFund="Y" loanVal="9292273.76"/>
				</securityLending>
			</invstOrSec>
			<invstOrSec>
				<name>WASTE MANAGEMENT INC</name>
				<lei>549300YX8JIID70NFS41</lei>
				<title>COMMON STOCK USD.01</title>
				<cusip>94106L109</cusip>
				<identifiers>
					<isin value="US94106L1098"/>
					<ticker value="WM"/>
					<other otherDesc="SEDOL Number" value="2937667"/>
				</identifiers>
				<balance>41383</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>3830410.48</valUSD>
				<pctVal>0.9557352099</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>ZILLOW GROUP INC   C</name>
				<lei>2549002XEELQDIR6FU05</lei>
				<title>COMMON STOCK</title>
				<cusip>98954M200</cusip>
				<identifiers>
					<isin value="US98954M2008"/>
					<ticker value="Z"/>
					<other otherDesc="SEDOL Number" value="BYXJF62"/>
				</identifiers>
				<balance>54900</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>1977498</valUSD>
				<pctVal>0.4934104258</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>
					<loanByFundCondition isLoanByFund="Y" loanVal="1592948.48"/>
				</securityLending>
			</invstOrSec>
			<invstOrSec>
				<name>ZOETIS INC</name>
				<lei>549300HD9Q1LOC9KLJ48</lei>
				<title>COMMON STOCK USD.01</title>
				<cusip>98978V103</cusip>
				<identifiers>
					<isin value="US98978V1035"/>
					<ticker value="ZTS"/>
					<other otherDesc="SEDOL Number" value="B95WG16"/>
				</identifiers>
				<balance>69124</balance>
				<units>NS</units>
				<curCd>USD</curCd>
				<valUSD>8135203.56</valUSD>
				<pctVal>2.0298347977</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>
		<signature>
			<ncom:dateSigned>2020-05-20</ncom:dateSigned>
			<ncom:nameOfApplicant>MASSMUTUAL SELECT FUNDS</ncom:nameOfApplicant>
			<ncom:signature>/s/ Renee Hitchcock</ncom:signature>
			<ncom:signerName>Renee Hitchcock</ncom:signerName>
			<ncom:title>Treasurer and CFO</ncom:title>
		</signature>
	</formData>
</edgarSubmission>
