<informationTable xmlns="http://www.sec.gov/edgar/document/thirteenf/informationtable">		<infoTable>
			<nameOfIssuer>ACXIOM CORP</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>005125109</cusip>
			<value>2685</value>
			<shrsOrPrnAmt>
				<sshPrnamt>94300</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>94300</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>ADVANSIX INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>00773T101</cusip>
			<value>4281</value>
			<shrsOrPrnAmt>
				<sshPrnamt>156700</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>156700</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>BLACKHAWK NETWORK HLDGS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>09238E104</cusip>
			<value>59054</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1454544</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>1454544</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CBOE HLDGS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>12503M108</cusip>
			<value>40960</value>
			<shrsOrPrnAmt>
				<sshPrnamt>505245</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>505245</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>COMMSCOPE HLDG CO INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>20337X109</cusip>
			<value>3179</value>
			<shrsOrPrnAmt>
				<sshPrnamt>76212</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>76212</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>COMMVAULT SYSTEMS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>204166102</cusip>
			<value>56896</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1120000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>1120000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CONSTELLATION BRANDS INC</nameOfIssuer>
			<titleOfClass>CL A</titleOfClass>
			<cusip>21036P108</cusip>
			<value>36466</value>
			<shrsOrPrnAmt>
				<sshPrnamt>225000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>225000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>FACEBOOK INC</nameOfIssuer>
			<titleOfClass>CL A</titleOfClass>
			<cusip>30303M102</cusip>
			<value>49718</value>
			<shrsOrPrnAmt>
				<sshPrnamt>350000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>350000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>FLEETCOR TECHNOLOGIES INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>339041105</cusip>
			<value>6489</value>
			<shrsOrPrnAmt>
				<sshPrnamt>42850</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>42850</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>HUNT J B TRANS SVCS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>445658107</cusip>
			<value>43577</value>
			<shrsOrPrnAmt>
				<sshPrnamt>475000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>475000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>KAR AUCTION SVCS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>48238T109</cusip>
			<value>44762</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1025000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>1025000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>LEVEL 3 COMMUNICATIONS INC</nameOfIssuer>
			<titleOfClass>COM NEW</titleOfClass>
			<cusip>52729N308</cusip>
			<value>22888</value>
			<shrsOrPrnAmt>
				<sshPrnamt>400000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>400000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>LIBERTY INTERACTIVE CORP</nameOfIssuer>
			<titleOfClass>QVC GP COM SER A</titleOfClass>
			<cusip>53071M104</cusip>
			<value>43043</value>
			<shrsOrPrnAmt>
				<sshPrnamt>2150000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>2150000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SCHWAB CHARLES CORP NEW</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>808513105</cusip>
			<value>38770</value>
			<shrsOrPrnAmt>
				<sshPrnamt>950000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>950000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SS&amp;C TECHNOLOGIES HLDGS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>78467J100</cusip>
			<value>49560</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1400000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>1400000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>TRIPADVISOR INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>896945201</cusip>
			<value>8632</value>
			<shrsOrPrnAmt>
				<sshPrnamt>200000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>200000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>VISA INC</nameOfIssuer>
			<titleOfClass>COM CL A</titleOfClass>
			<cusip>92826C839</cusip>
			<value>67044</value>
			<shrsOrPrnAmt>
				<sshPrnamt>754400</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>754400</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>WABTEC CORP</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>929740108</cusip>
			<value>38220</value>
			<shrsOrPrnAmt>
				<sshPrnamt>490000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>490000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
</informationTable>
