<SEC-DOCUMENT>0000914208-25-000400.txt : 20251106
<SEC-HEADER>0000914208-25-000400.hdr.sgml : 20251106
<ACCEPTANCE-DATETIME>20251106162537
ACCESSION NUMBER:		0000914208-25-000400
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20251106
DATE AS OF CHANGE:		20251106

SUBJECT COMPANY:	

	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

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-94638
		FILM NUMBER:		251458790

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Invesco Ltd.
		CENTRAL INDEX KEY:			0000914208
		STANDARD INDUSTRIAL CLASSIFICATION:	INVESTMENT ADVICE [6282]
		ORGANIZATION NAME:           	02 Finance
		EIN:				980557567
		STATE OF INCORPORATION:			D0
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		1331 SPRING STREET NW
		STREET 2:		SUITE 2500
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30309
		BUSINESS PHONE:		404-892-0896

	MAIL ADDRESS:	
		STREET 1:		1331 SPRING STREET NW
		STREET 2:		SUITE 2500
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30309

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Invesco Asset Management Deutschland GMBH
		DATE OF NAME CHANGE:	20211102

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Invesco Ltd.
		DATE OF NAME CHANGE:	20080520

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Invesco Ltd
		DATE OF NAME CHANGE:	20080508
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13G/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/schedule13g" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>SCHEDULE 13G/A</submissionType>
    <previousAccessionNumber>0000914208-25-000038</previousAccessionNumber>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0000914208</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <coverPageHeader>
      <amendmentNo>2</amendmentNo>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <eventDateRequiresFilingThisStatement>09/30/2025</eventDateRequiresFilingThisStatement>
      <issuerInfo>
        <issuerCik>0002011286</issuerCik>
        <issuerName>Amentum Holdings Inc</issuerName>
        <issuerCusip>023939101</issuerCusip>
        <issuerPrincipalExecutiveOfficeAddress>
          <com:street1>4800 Westfields Blvd</com:street1>
          <com:street2>Suite 400</com:street2>
          <com:city>Chantilly</com:city>
          <com:stateOrCountry>X1</com:stateOrCountry>
          <com:zipCode>20151</com:zipCode>
        </issuerPrincipalExecutiveOfficeAddress>
      </issuerInfo>
      <designateRulesPursuantThisScheduleFiled>
        <designateRulePursuantThisScheduleFiled>Rule 13d-1(b)</designateRulePursuantThisScheduleFiled>
      </designateRulesPursuantThisScheduleFiled>
    </coverPageHeader>
    <coverPageHeaderReportingPersonDetails>

      <reportingPersonName>Invesco Ltd.</reportingPersonName>
      <citizenshipOrOrganization>D0</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>22069274</soleVotingPower>
        <sharedVotingPower>0</sharedVotingPower>
        <soleDispositivePower>22116835</soleDispositivePower>
        <sharedDispositivePower>0</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>22116835.00</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <classPercent>9.1</classPercent>
      <typeOfReportingPerson>HC</typeOfReportingPerson>
      <typeOfReportingPerson>IA</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <items>
      <item1>
        <issuerName>Amentum Holdings Inc</issuerName>
        <issuerPrincipalExecutiveOfficeAddress>4800 Westfields Blvd, Suite 400, Chantilly, VA 20151</issuerPrincipalExecutiveOfficeAddress>
      </item1>
      <item2>
        <filingPersonName>Invesco Ltd. ("Invesco Ltd.")</filingPersonName>
        <principalBusinessOfficeOrResidenceAddress>1331 Spring Street NE, Suite 2500, Atlanta, GA  30309
</principalBusinessOfficeOrResidenceAddress>
        <citizenship>Bermuda</citizenship>
      </item2>
      <item3>
        <notApplicableFlag>N</notApplicableFlag>
        <typeOfPersonFiling>HC</typeOfPersonFiling>
        <typeOfPersonFiling>IA</typeOfPersonFiling>
      </item3>
      <item4>
        <amountBeneficiallyOwned>Invesco Ltd., in its capacity as a parent holding company to its investment advisers, may be deemed to beneficially own 22,116,835 shares of the Issuer which are held of record by clients of Invesco Ltd.</amountBeneficiallyOwned>
        <classPercent>9.1</classPercent>
        <numberOfSharesPersonHas>
          <solePowerOrDirectToVote>22,069,274</solePowerOrDirectToVote>
          <sharedPowerOrDirectToVote>0</sharedPowerOrDirectToVote>
          <solePowerOrDirectToDispose>22,116,835</solePowerOrDirectToDispose>
          <sharedPowerOrDirectToDispose>0</sharedPowerOrDirectToDispose>
        </numberOfSharesPersonHas>
      </item4>
      <item5>
        <notApplicableFlag>Y</notApplicableFlag>
      </item5>
      <item6>
        <notApplicableFlag>N</notApplicableFlag>
        <ownershipMoreThan5PercentOnBehalfOfAnotherPerson>However, no one individual has greater than 5% economic ownership. The shareholders of the Fund have the right to receive or the power to direct the receipt of dividends and proceeds from the sale of securities listed above.</ownershipMoreThan5PercentOnBehalfOfAnotherPerson>
      </item6>
      <item7>
        <notApplicableFlag>N</notApplicableFlag>
        <subsidiaryIdentificationAndClassification>
Invesco Advisers, Inc.
Invesco Asset Management Limited
Invesco Capital Management LLC</subsidiaryIdentificationAndClassification>
      </item7>
      <item8>
        <notApplicableFlag>Y</notApplicableFlag>
      </item8>
      <item9>
        <notApplicableFlag>Y</notApplicableFlag>
      </item9>
      <item10>
        <notApplicableFlag>N</notApplicableFlag>
        <certifications>By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.</certifications>
      </item10>
    </items>
    <signatureInformation>
      <reportingPersonName>Invesco Ltd.</reportingPersonName>
      <signatureDetails>
        <signature>Robert R. Leveille</signature>
        <title>Global Head of Compliance</title>
        <date>11/06/2025</date>
      </signatureDetails>
    </signatureInformation>
  </formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
