<SEC-DOCUMENT>0001493152-24-052278.txt : 20241227
<SEC-HEADER>0001493152-24-052278.hdr.sgml : 20241227
<ACCEPTANCE-DATETIME>20241227163025
ACCESSION NUMBER:		0001493152-24-052278
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20241217
FILED AS OF DATE:		20241227
DATE AS OF CHANGE:		20241227

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Lindsay Goldberg V L.P.
		CENTRAL INDEX KEY:			0001743020
		ORGANIZATION NAME:           	
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-42176
		FILM NUMBER:		241586018

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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LG Co-Inv. A L.P.
		CENTRAL INDEX KEY:			0002037394
		ORGANIZATION NAME:           	
		STATE OF INCORPORATION:			E9
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-42176
		FILM NUMBER:		241586019

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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Lindsay Goldberg Employee Co-Inv. IV L.P.
		CENTRAL INDEX KEY:			0002037350
		ORGANIZATION NAME:           	
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-42176
		FILM NUMBER:		241586020

	BUSINESS ADDRESS:	
		STREET 1:		C/O LINDSAY GOLDBERG LLC
		STREET 2:		630 FIFTH AVENUE, 30TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10111
		BUSINESS PHONE:		(212) 651-1148

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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LG Amentum Holdings LP
		CENTRAL INDEX KEY:			0002037445
		ORGANIZATION NAME:           	
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-42176
		FILM NUMBER:		241586015

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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Lindsay Goldberg Maverick Co-Inv. L.P.
		CENTRAL INDEX KEY:			0002037408
		ORGANIZATION NAME:           	
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-42176
		FILM NUMBER:		241586017

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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LG Amentum Holdings GP LLC
		CENTRAL INDEX KEY:			0002037417
		ORGANIZATION NAME:           	
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-42176
		FILM NUMBER:		241586016

	BUSINESS ADDRESS:	
		STREET 1:		C/O LINDSAY GOLDBERG 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 LINDSAY GOLDBERG 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
		IRS NUMBER:				990622272
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0927

	BUSINESS ADDRESS:	
		STREET 1:		600 WILLIAM NORTHERN BLVD
		CITY:			TULLAHOMA
		STATE:			TN
		ZIP:			37388
		BUSINESS PHONE:		2149208175

	MAIL ADDRESS:	
		STREET 1:		600 WILLIAM NORTHERN BLVD
		CITY:			TULLAHOMA
		STATE:			TN
		ZIP:			37388

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Amazon Holdco Inc.
		DATE OF NAME CHANGE:	20240208
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
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<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2024-12-17</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002037350</rptOwnerCik>
            <rptOwnerName>Lindsay Goldberg Employee Co-Inv. IV L.P.</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>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002037394</rptOwnerCik>
            <rptOwnerName>LG Co-Inv. A L.P.</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>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001743020</rptOwnerCik>
            <rptOwnerName>Lindsay Goldberg V L.P.</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>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002037408</rptOwnerCik>
            <rptOwnerName>Lindsay Goldberg Maverick Co-Inv. L.P.</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>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002037417</rptOwnerCik>
            <rptOwnerName>LG Amentum Holdings 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>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002037445</rptOwnerCik>
            <rptOwnerName>LG Amentum Holdings 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>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>43893904</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Mr. Goldberg is the Managing Member of Goldberg 2014 LLC and the Manager of Goldberg 2020 LLC. Goldberg 2014 LLC is the Active Member (and thereby, the manager) of LG GP Holding IV LLC, which is the managing member of Lindsay Goldberg GP IV LLC, which is the general partner of each of Lindsay Goldberg IV L.P., Lindsay Goldberg IV - A L.P., Lindsay Goldberg IV - PCF L.P., Lindsay Goldberg Co-Inv. IV L.P. and Lindsay Goldberg Employee Co-Inv. IV L.P (together, the &quot;LG Fund IV Partnerships&quot;). Goldberg 2020 LLC is the Manager of LG GP Holding V LLC, which is the managing member of Lindsay Goldberg GP V LLC, which is the general partner of each of Lindsay Goldberg V L.P. and Lindsay Goldberg Maverick Co-Inv. L.P. (together, the &quot;LG Fund V Partnerships&quot;).</footnote>
        <footnote id="F2">Each of Lindsay Goldberg GP IV LLC and Lindsay Goldberg GP V LLC are the general partners of LG Co-Inv. A LP. Each of the LG Fund IV Partnerships, the LG Fund V Partnerships and LG Co-Inv. A LP are members of LG Amentum Holdings GP LLC, which is the general partner of LG Amentum Holdings LP. Each of the Reporting Persons other than LG Amentum Holdings LP may be deemed to share beneficial ownership of the Common Shares directly held by LG Amentum Holdings LP.</footnote>
    </footnotes>

    <remarks>Due to limitations of the electronic filing system, Goldberg 2014 LLC, Goldberg 2020 LLC, LG GP Holding IV LLC, LG GP Holding V LLC, Lindsay Goldberg GP IV LLC, Lindsay Goldberg GP V LLC, Lindsay Goldberg IV L.P., Lindsay Goldberg IV - A L.P., Lindsay Goldberg IV - PCF L.P. and Lindsay Goldberg Co-Inv. IV L.P. are filing a separate Form 3. Mr. Goldberg is filing a separate Form 4.</remarks>

    <ownerSignature>
        <signatureName>Lindsay Goldberg Employee Co-Inv. IV L.P. By: Lindsay Goldberg GP IV LLC, its General Partner /s/ James C. Pickel, Jr., Vice President</signatureName>
        <signatureDate>2024-12-27</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>LG CO-INV. A L.P. By: Lindsay Goldberg GP IV LLC, its General Partner, /s/ James C. Pickel, Jr., Vice President By: Lindsay Goldberg GP V LLC, its General Partner, /s/ James C. Pickel, Jr., Vice President</signatureName>
        <signatureDate>2024-12-27</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>LINDSAY GOLDBERG V L.P. By: Lindsay Goldberg GP V LLC, its General Partner /s/ James C. Pickel, Jr., Vice President</signatureName>
        <signatureDate>2024-12-27</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>LINDSAY GOLDBERG MAVERICK CO-INV. L.P. By: Lindsay Goldberg GP V LLC, its General Partner /s/ James C. Pickel, Jr., Vice President</signatureName>
        <signatureDate>2024-12-27</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>LG AMENTUM HOLDINGS GP LLC /s/ James C. Pickel, Jr., Vice President</signatureName>
        <signatureDate>2024-12-27</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>LG AMENTUM HOLDINGS LP By: LG Amentum Holdings GP LLC, its General Partner /s/ James C. Pickel, Jr., Vice President</signatureName>
        <signatureDate>2024-12-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</SEC-DOCUMENT>
