<SEC-DOCUMENT>0000950170-25-002821.txt : 20250107
<SEC-HEADER>0000950170-25-002821.hdr.sgml : 20250107
<ACCEPTANCE-DATETIME>20250107160350
ACCESSION NUMBER:		0000950170-25-002821
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250103
FILED AS OF DATE:		20250107
DATE AS OF CHANGE:		20250107

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Apostolou Stephanie L
		CENTRAL INDEX KEY:			0001806249
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32737
		FILM NUMBER:		25514853

	MAIL ADDRESS:	
		STREET 1:		436 SEVENTH AVENUE
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15219

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Koppers Holdings Inc.
		CENTRAL INDEX KEY:			0001315257
		STANDARD INDUSTRIAL CLASSIFICATION:	LUMBER & WOOD PRODUCTS (NO FURNITURE) [2400]
		ORGANIZATION NAME:           	04 Manufacturing
		IRS NUMBER:				201878963
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		436 SEVENTH AVENUE
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15219
		BUSINESS PHONE:		412-227-2001

	MAIL ADDRESS:	
		STREET 1:		436 SEVENTH AVENUE
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15219

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	KI Holdings Inc.
		DATE OF NAME CHANGE:	20050124
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
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        <issuerName>Koppers Holdings Inc.</issuerName>
        <issuerTradingSymbol>KOP</issuerTradingSymbol>
    </issuer>

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            <rptOwnerName>Apostolou Stephanie L</rptOwnerName>
        </reportingOwnerId>
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            <rptOwnerStreet1>436 SEVENTH AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PITTSBURGH</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>15219</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>true</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>Chief Legal&amp;Sus Officer &amp; Sec.</officerTitle>
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        </derivativeTransaction>
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    <footnotes>
        <footnote id="F1">The reporting person was awarded time-based restricted stock units (&quot;RSUs&quot;) on January 3, 2025, which will vest in annual installments of 25 percent over four years.</footnote>
        <footnote id="F2">Includes 495 shares of Koppers Holdings Inc. common stock acquired pursuant to the Koppers Holdings Inc. Employee Stock Purchase Plan on March 28, 2024. These acquisitions were exempt under both Rule 16b-3(c) and Rule 16b-3(d).</footnote>
        <footnote id="F3">Restricted stock units convert into common stock on a one-for-one basis.</footnote>
        <footnote id="F4">Represents shares acquired upon release of dividend equivalent rights (&quot;DERs&quot;), as reported in Table II, on a one-for-one basis.</footnote>
        <footnote id="F5">Shares surrendered to the issuer by the reporting person as payment for the tax withholding related to the vesting of RSUs and performance share units (&quot;PSUs&quot;).</footnote>
        <footnote id="F6">On January 4, 2022, the reporting person was granted PSUs for which the performance criteria for the three-year performance period from January 1, 2022 through December 31, 2024 have been satisfied.</footnote>
        <footnote id="F7">On January 4, 2023, the reporting person was granted PSUs for which the performance criteria for the two-year performance period from January 1, 2023 through December 31, 2024 have been satisfied. All of the restricted stock units reported here are subject to vesting based on the continued service of the reporting person through January 5, 2026. If the Company's total shareholder return over the three-year period of January 1, 2023 through December 31, 2025 is negative, then the cumulative number of units that may vest for such three-year period will be capped at 150% of the target number.</footnote>
        <footnote id="F8">The DERs accrued with respect to additional PSUs credited to the reporting person with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.</footnote>
        <footnote id="F9">Represents previously granted PSUs for which the performance criteria for the three-year performance period from January 1, 2022 through December 31, 2024 have been satisfied, as reported in Table II above.</footnote>
        <footnote id="F10">These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/Stephanie L. Apostolou</signatureName>
        <signatureDate>2025-01-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</SEC-DOCUMENT>
