<SEC-DOCUMENT>0001415889-25-016249.txt : 20250609
<SEC-HEADER>0001415889-25-016249.hdr.sgml : 20250609
<ACCEPTANCE-DATETIME>20250609162018
ACCESSION NUMBER:		0001415889-25-016249
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250605
FILED AS OF DATE:		20250609
DATE AS OF CHANGE:		20250609

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Humphries William D.
		CENTRAL INDEX KEY:			0001674278
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37581
		FILM NUMBER:		251034376

	MAIL ADDRESS:	
		STREET 1:		C/O STRATA SKIN SCIENCES, INC.
		STREET 2:		5 WALNUT GROVE DRIVE SUITE 140
		CITY:			HORSHAM
		STATE:			PA
		ZIP:			19044

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Aclaris Therapeutics, Inc.
		CENTRAL INDEX KEY:			0001557746
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		EIN:				460571712
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		701 LEE ROAD
		STREET 2:		SUITE 103
		CITY:			WAYNE
		STATE:			PA
		ZIP:			19087
		BUSINESS PHONE:		484-324-7933

	MAIL ADDRESS:	
		STREET 1:		701 LEE ROAD
		STREET 2:		SUITE 103
		CITY:			WAYNE
		STATE:			PA
		ZIP:			19087
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
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<TEXT>
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    <periodOfReport>2025-06-05</periodOfReport>

    <issuer>
        <issuerCik>0001557746</issuerCik>
        <issuerName>Aclaris Therapeutics, Inc.</issuerName>
        <issuerTradingSymbol>ACRS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
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            <rptOwnerCik>0001674278</rptOwnerCik>
            <rptOwnerName>Humphries William D.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ACLARIS THERAPEUTICS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>701 LEE ROAD, SUITE 103</rptOwnerStreet2>
            <rptOwnerCity>WAYNE</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19087</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
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                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-06-06</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>4793</value>
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                <transactionPricePerShare>
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                <sharesOwnedFollowingTransaction>
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        </nonDerivativeTransaction>
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    <derivativeTable>
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            <expirationDate>
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        </derivativeTransaction>
        <derivativeTransaction>
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        </derivativeTransaction>
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                <transactionPricePerShare>
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            <exerciseDate>
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        </derivativeTransaction>
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    <footnotes>
        <footnote id="F1">Each restricted stock unit represents a contingent right to receive one share of common stock of the issuer.</footnote>
        <footnote id="F2">The shares subject to this stock option will vest in twelve equal monthly installments commencing on July 5, 2025, subject to the Reporting Person's Continuous Service (as defined in the Plan) through each such vesting date.</footnote>
        <footnote id="F3">This grant was made pursuant to the issuer's tenth amended and restated non-employee director compensation policy.</footnote>
        <footnote id="F4">The shares underlying these restricted stock units will vest in one installment on June 5, 2026, subject to the Reporting Person's Continuous Service (as defined in the Plan) as of such date.</footnote>
        <footnote id="F5">The shares underlying these restricted stock units vested on June 6, 2025.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Matthew Rothman, Attorney-in-Fact</signatureName>
        <signatureDate>2025-06-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
