<SEC-DOCUMENT>0000950157-25-000397.txt : 20250512
<SEC-HEADER>0000950157-25-000397.hdr.sgml : 20250512
<ACCEPTANCE-DATETIME>20250512090742
ACCESSION NUMBER:		0000950157-25-000397
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250508
FILED AS OF DATE:		20250512
DATE AS OF CHANGE:		20250512

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Amentum Joint Venture LP
		CENTRAL INDEX KEY:			0002037182
		ORGANIZATION NAME:           	
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-42176
		FILM NUMBER:		25932874

	BUSINESS ADDRESS:	
		STREET 1:		C/O GOLDBERG LINDSAY & CO. LLC
		STREET 2:		630 FIFTH AVENUE, 30TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10111
		BUSINESS PHONE:		212-651-1100

	MAIL ADDRESS:	
		STREET 1:		C/O GOLDBERG LINDSAY & CO. LLC
		STREET 2:		630 FIFTH AVENUE, 30TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10111

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Amentum Joint Venture GP LLC
		CENTRAL INDEX KEY:			0002037401
		ORGANIZATION NAME:           	
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-42176
		FILM NUMBER:		25932875

	BUSINESS ADDRESS:	
		STREET 1:		C/O GOLDBERG LINDSAY & CO. LLC
		STREET 2:		630 FIFTH AVENUE, 30TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10111
		BUSINESS PHONE:		212-651-1100

	MAIL ADDRESS:	
		STREET 1:		C/O GOLDBERG LINDSAY & CO. LLC
		STREET 2:		630 FIFTH AVENUE, 30TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10111

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Amentum Holdings, Inc.
		CENTRAL INDEX KEY:			0002011286
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-BUSINESS SERVICES, NEC [7389]
		ORGANIZATION NAME:           	07 Trade & Services
		EIN:				990622272
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1003

	BUSINESS ADDRESS:	
		STREET 1:		4800 WESTFIELDS BOULEVARD
		STREET 2:		SUITE 400
		CITY:			CHANTILLY
		STATE:			VA
		ZIP:			20151
		BUSINESS PHONE:		7035790410

	MAIL ADDRESS:	
		STREET 1:		4800 WESTFIELDS BOULEVARD
		STREET 2:		SUITE 400
		CITY:			CHANTILLY
		STATE:			VA
		ZIP:			20151

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Amazon Holdco Inc.
		DATE OF NAME CHANGE:	20240208
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-05-08</periodOfReport>

    <issuer>
        <issuerCik>0002011286</issuerCik>
        <issuerName>Amentum Holdings, Inc.</issuerName>
        <issuerTradingSymbol>AMTM</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002037401</rptOwnerCik>
            <rptOwnerName>Amentum Joint Venture GP LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GOLDBERG LINDSAY &amp; CO. LLC</rptOwnerStreet1>
            <rptOwnerStreet2>630 FIFTH AVENUE, 30TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002037182</rptOwnerCik>
            <rptOwnerName>Amentum Joint Venture LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GOLDBERG LINDSAY &amp; CO. LLC</rptOwnerStreet1>
            <rptOwnerStreet2>630 FIFTH AVENUE, 30TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>false</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-05-08</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2433022</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Amentum Joint Venture LP</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This Form 4 is filed jointly by (i) Amentum Joint Venture GP LLC and (ii) Amentum Joint Venture LP (&quot;Amentum JV&quot;). Amentum Joint Venture GP LLC is the general partner of Amentum JV and may be deemed to have indirect voting and investment control over the shares held by Amentum JV.  The shares of the Issuer reported as disposed in this Form 4 were owned directly by Amentum JV as a result of a Reverse Morris Trust transaction, with the Issuer surviving and being renamed Amentum Holdings, Inc., pursuant to the merger agreement and separation and distribution agreement, each dated as of November 20, 2023, among, in each case, Jacobs Solutions, Inc., the Issuer, Amentum Parent Holdings LLC and Amentum JV (as amended). The purpose of this Form 4 is to report that the Reporting Persons no longer beneficially own any shares of the Issuer.</footnote>
        <footnote id="F2">On May 8, 2025, Amentum JV made pro rata distributions-in-kind of all of the shares of the Issuer held by Amentum JV to each of its limited partners in accordance with the limited partnership agreement of Amentum JV.  As a result, Amentum JV no longer holds, and each of the Reporting Persons no longer beneficially owns, any shares of the Issuer.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ James C. Pickel, Jr., Authorized Signatory for Amentum Joint Venture GP LLC</signatureName>
        <signatureDate>2025-05-12</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Eric Schondorf, Authorized Signatory for Amentum Joint Venture GP LLC</signatureName>
        <signatureDate>2025-05-12</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ James C. Pickel, Jr., Authorized Signatory for Amentum Joint Venture GP LLC, the general partner of Amentum Joint Venture LP</signatureName>
        <signatureDate>2025-05-12</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Eric Schondorf, Authorized Signatory for Amentum Joint Venture GP LLC, the general partner of Amentum Joint Venture LP</signatureName>
        <signatureDate>2025-05-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
