<SEC-DOCUMENT>0001793229-21-000037.txt : 20210601
<SEC-HEADER>0001793229-21-000037.hdr.sgml : 20210601
<ACCEPTANCE-DATETIME>20210601171130
ACCESSION NUMBER:		0001793229-21-000037
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210527
FILED AS OF DATE:		20210601
DATE AS OF CHANGE:		20210601

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Klein Michael Stuart
		CENTRAL INDEX KEY:			0001327392

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39228
		FILM NUMBER:		21986364

	MAIL ADDRESS:	
		STREET 1:		C/O DAVIS POLK & WARDWELL
		STREET 2:		450 LEXINGTON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MultiPlan Corp
		CENTRAL INDEX KEY:			0001793229
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-BUSINESS SERVICES, NEC [7389]
		IRS NUMBER:				843536151
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		115 FIFTH AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10003
		BUSINESS PHONE:		(212) 780-2000

	MAIL ADDRESS:	
		STREET 1:		115 FIFTH AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10003

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Churchill Capital Corp III
		DATE OF NAME CHANGE:	20200127

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Butler Acquisition Corp
		DATE OF NAME CHANGE:	20191105
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_162258186126852.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-05-27</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001793229</issuerCik>
        <issuerName>MultiPlan Corp</issuerName>
        <issuerTradingSymbol>MPLN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001327392</rptOwnerCik>
            <rptOwnerName>Klein Michael Stuart</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>640 FIFTH AVENUE, 12TH FLOORR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-05-27</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>11723</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>19016</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A common stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>30122711</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See note</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Represents restricted stock units which vest on the earlier of the one-year anniversary of the grant date and the date of the next regularly scheduled annual meeting of stockholders of the issuer, subject to continued service through the vesting date; provided, however, that the restricted stock units vest pro rata based on the number of days of service provided to the issuer in the event of a voluntary resignation other than when grounds for termination for cause exist.</footnote>
        <footnote id="F2">Includes shares of Class A common stock directly held by M. Klein &amp; Company, LLC and Churchill Sponsor III, LLC.</footnote>
        <footnote id="F3">The Reporting Person has a minority interest in M. Klein &amp; Company, LLC, and is the sole stockholder of M. Klein Associates, Inc., which is the managing member of Churchill Sponsor III, LLC. The filing of this statement shall not be deemed to be an admission that, for purposes of Section 16 under the Securities Exchange Act of 1934, as amended, or otherwise, the Reporting Person is the beneficial owner of any securities reported herein. The Reporting Person disclaims beneficial ownership of any securities of the Issuer except to the extent of the Reporting Person's pecuniary interest therein.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Michael Stuart Klein</signatureName>
        <signatureDate>2021-06-01</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
