<SEC-DOCUMENT>0001179110-17-008047.txt : 20170526
<SEC-HEADER>0001179110-17-008047.hdr.sgml : 20170526
<ACCEPTANCE-DATETIME>20170526094559
ACCESSION NUMBER:		0001179110-17-008047
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20170307
FILED AS OF DATE:		20170526
DATE AS OF CHANGE:		20170526

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Primoris Services Corp
		CENTRAL INDEX KEY:			0001361538
		STANDARD INDUSTRIAL CLASSIFICATION:	WATER, SEWER, PIPELINE, COMM AND POWER LINE CONSTRUCTION [1623]
		IRS NUMBER:				204743916
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2100 MCKINNEY AVENUE, SUITE 1500
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75201
		BUSINESS PHONE:		214-740-5600

	MAIL ADDRESS:	
		STREET 1:		2100 MCKINNEY AVENUE, SUITE 1500
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75201

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Primoris Services CORP
		DATE OF NAME CHANGE:	20080821

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Rhapsody Acquisition Corp.
		DATE OF NAME CHANGE:	20060503

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			McCormick Thomas Edward
		CENTRAL INDEX KEY:			0001704011

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34145
		FILM NUMBER:		17872093

	MAIL ADDRESS:	
		STREET 1:		2100 MCKINNEY AVE
		STREET 2:		SUITE 1500
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75201
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 3 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2017-03-07</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001361538</issuerCik>
        <issuerName>Primoris Services Corp</issuerName>
        <issuerTradingSymbol>PRIM</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001704011</rptOwnerCik>
            <rptOwnerName>McCormick Thomas Edward</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O PRIMORIS SERVICES CORPORTATION</rptOwnerStreet1>
            <rptOwnerStreet2>2100 MCKINNEY AVENUE, SUITE 1500</rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75201</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Operating Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3779</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Purchased Common Stock shares as part of the Company's Long-Term Retention Plan. The Plan provides certain management employees the opportunity to purchase Company stock with a defined portion of their annual incentive compensation at a discount to the market price. Purchase made through payroll deductions in March 2017, share certificates received on March 7, 2017. Purchases were made at a 25% reduction to the average closing price during January 2017. Shares cannot be sold for 6 months.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Peter J. Moerbeek, by power of attorney</signatureName>
        <signatureDate>2017-05-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
