<SEC-DOCUMENT>0001411833-25-000003.txt : 20250918
<SEC-HEADER>0001411833-25-000003.hdr.sgml : 20250918
<ACCEPTANCE-DATETIME>20250918161457
ACCESSION NUMBER:		0001411833-25-000003
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250918
FILED AS OF DATE:		20250918
DATE AS OF CHANGE:		20250918

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Corbus Barclay
		CENTRAL INDEX KEY:			0001411833
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33480
		FILM NUMBER:		251323590

	MAIL ADDRESS:	
		STREET 1:		C/O CLEAN ENERGY FUELS CORP
		STREET 2:		4675 MACARTHUR COURT, SUITE 800
		CITY:			NEWPORT BEACH
		STATE:			CA
		ZIP:			92660

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Clean Energy Fuels Corp.
		CENTRAL INDEX KEY:			0001368265
		STANDARD INDUSTRIAL CLASSIFICATION:	GAS & OTHER SERVICES COMBINED [4932]
		ORGANIZATION NAME:           	01 Energy & Transportation
		EIN:				330968580
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		4675 MACARTHUR COURT, SUITE 800
		CITY:			NEWPORT BEACH
		STATE:			CA
		ZIP:			92660
		BUSINESS PHONE:		(949) 437-1000

	MAIL ADDRESS:	
		STREET 1:		4675 MACARTHUR COURT, SUITE 800
		CITY:			NEWPORT BEACH
		STATE:			CA
		ZIP:			92660

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Clean Energy Fuels, Corp.
		DATE OF NAME CHANGE:	20060703
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4-09182025_080954.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-09-18</periodOfReport>

    <issuer>
        <issuerCik>0001368265</issuerCik>
        <issuerName>Clean Energy Fuels Corp.</issuerName>
        <issuerTradingSymbol>CLNE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001411833</rptOwnerCik>
            <rptOwnerName>Corbus Barclay</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CLEAN ENERGY FUELS CORP.</rptOwnerStreet1>
            <rptOwnerStreet2>4675 MACARTHUR COURT, SUITE 800</rptOwnerStreet2>
            <rptOwnerCity>NEWPORT BEACH</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92660</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>true</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>SVP, STRATEGIC DEVELOPMENT</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-09-18</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>105300</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.6299</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1061248</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Shares were sold in multiple transactions at prices ranging from $2.6050 to $2.6550. The price reported in Column 4 is a weighted average sale price. The Reporting Person undertakes to provide to the Issuer, any security holder of Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the range set forth in this footnote.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Marilyn Vu-Tran, Attorney-in-Fact for Barclay Corbus</signatureName>
        <signatureDate>2025-09-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
