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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 EYV+ybuSqHINkg2FiGYb9M6wwRWBVehQ9Xe8meVjLFB2cpZ6gjnICA8PWgXVkUON
 Upnt0PvY3fyfFQ5nY5UVBw==

<SEC-DOCUMENT>0001140361-10-024921.txt : 20100609
<SEC-HEADER>0001140361-10-024921.hdr.sgml : 20100609
<ACCEPTANCE-DATETIME>20100609190225
ACCESSION NUMBER:		0001140361-10-024921
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100609
FILED AS OF DATE:		20100609
DATE AS OF CHANGE:		20100609

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TUTOR PERINI Corp
		CENTRAL INDEX KEY:			0000077543
		STANDARD INDUSTRIAL CLASSIFICATION:	GENERAL BUILDING CONTRACTORS - NONRESIDENTIAL BUILDINGS [1540]
		IRS NUMBER:				041717070
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		15901 OLDEN STREET
		CITY:			SYLMAR
		STATE:			CA
		ZIP:			91342
		BUSINESS PHONE:		818-362-8391

	MAIL ADDRESS:	
		STREET 1:		15901 OLDEN STREET
		CITY:			SYLMAR
		STATE:			CA
		ZIP:			91342

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PERINI CORP
		DATE OF NAME CHANGE:	19920703

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Ronald N. Tutor Separate Property Trust
		CENTRAL INDEX KEY:			0001445408
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06314
		FILM NUMBER:		10888755

	BUSINESS ADDRESS:	
		STREET 1:		C/O JOHN D. BARRETT
		STREET 2:		15901 OLDEN STREET
		CITY:			SYLMAR
		STATE:			CA
		ZIP:			91342
		BUSINESS PHONE:		818-362-8391

	MAIL ADDRESS:	
		STREET 1:		C/O JOHN D. BARRETT
		STREET 2:		15901 OLDEN STREET
		CITY:			SYLMAR
		STATE:			CA
		ZIP:			91342
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4/A
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2010-06-09</periodOfReport>

    <dateOfOriginalSubmission>2010-06-09</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000077543</issuerCik>
        <issuerName>TUTOR PERINI Corp</issuerName>
        <issuerTradingSymbol>TPC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001445408</rptOwnerCik>
            <rptOwnerName>Ronald N. Tutor Separate Property Trust</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O JOHN D. BARRETT</rptOwnerStreet1>
            <rptOwnerStreet2>15901 OLDEN STREET</rptOwnerStreet2>
            <rptOwnerCity>SYLMAR</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>91342</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-06-09</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>600000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>16.68</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>18772900</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Amendment reflects a change in transaction code from D to S to properly classify the transaction as an open market sale of non-derivative securities.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Ronald N. Tutor</signatureName>
        <signatureDate>2010-06-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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