<SEC-DOCUMENT>0000950157-24-001329.txt : 20240927
<SEC-HEADER>0000950157-24-001329.hdr.sgml : 20240927
<ACCEPTANCE-DATETIME>20240927171417
ACCESSION NUMBER:		0000950157-24-001329
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20240927
FILED AS OF DATE:		20240927
DATE AS OF CHANGE:		20240927

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DEMETRIOU STEVEN J.
		CENTRAL INDEX KEY:			0001173003
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-42176
		FILM NUMBER:		241335962

	MAIL ADDRESS:	
		STREET 1:		25825 SCIENCE PARK DRIVE, SUITE 400
		CITY:			BEACHWOOD
		STATE:			OH
		ZIP:			44102

	FORMER NAME:	
		FORMER CONFORMED NAME:	DEMETRIOU STEVEN J
		DATE OF NAME CHANGE:	20020509

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
<FILENAME>form3.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2024-09-27</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001173003</rptOwnerCik>
            <rptOwnerName>DEMETRIOU STEVEN J.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O AMENTUM HOLDINGS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>4800 WESTFIELDS BOULEVARD, SUITE 400</rptOwnerStreet2>
            <rptOwnerCity>CHANTILLY</rptOwnerCity>
            <rptOwnerState>VA</rptOwnerState>
            <rptOwnerZipCode>20151</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>true</isOfficer>
            <officerTitle>Executive Chair</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <remarks>Exhibit 24 - Power of Attorney</remarks>

    <ownerSignature>
        <signatureName>/s/ Paul W. Cobb, Jr.
Attorney-in-fact</signatureName>
        <signatureDate>2024-09-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>ex-24.htm
<DESCRIPTION>POWER OF ATTORNEY
<TEXT>
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    <title></title>
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<body bgcolor="#ffffff" style="font-family: 'Times New Roman'; font-size: 10pt; text-align: left; color: #000000;">
  <div style="text-align: right;"><font style="font-weight: bold;">Exhibit 24</font><br>
  </div>
  <div><br>
  </div>
  <div>
    <div style="text-align: center; color: #000000; font-weight: bold;">POWER OF ATTORNEY</div>
    <div><br>
    </div>
    <div style="color: #000000;">Know all by these presents, that the undersigned hereby constitutes and appoints Paul W. Cobb, Jr. and Mark Esposito, any such person signing individually, as the undersigned&#8217;s true and lawful attorneys-in-fact, solely in
      connection with the undersigned&#8217;s ownership, acquisition or disposition of common stock of Amentum Holdings, Inc., to:</div>
    <div><br>
    </div>
    <div style="margin-left: 36pt; color: #000000;">(1) execute for and on behalf of the undersigned any filings related to the undersigned&#8217;s ownership, acquisition or disposition solely of common stock of Amentum Holdings, Inc. on Schedule 13D or Forms 3,
      4, 5 or 144 in accordance with Sections 13(d) and 16(a) of the Securities Exchange Act of 1934 and the rules and regulations thereunder and Rule 144 of the Securities Act of 1933;</div>
    <div><br>
    </div>
    <div style="margin-left: 36pt; color: #000000;">(2) do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such filings on Schedule 13D or Forms 3, 4, 5 or 144, or other form
      or report, or any amendment or amendments thereto, and timely file such form with the SEC solely in connection with the undersigned&#8217;s ownership, acquisition or disposition of common stock of Amentum Holdings, Inc.; and</div>
    <div><br>
    </div>
    <div style="margin-left: 36pt; color: #000000;">(3) take any other action of any type in connection with the foregoing which, in the opinion of such attorneys-in-fact, may be of benefit to, in the best interest of, or legally required by, the
      undersigned, solely in connection with the undersigned&#8217;s ownership, acquisition or disposition of Amentum Holdings, Inc., it being understood that the documents executed by such attorneys-in-fact on behalf of the undersigned pursuant to this Power of
      Attorney shall be in such form and shall contain such terms and conditions as such attorneys-in-fact may approve in such attorneys-in-fact&#8217;s discretion.</div>
    <div><br>
    </div>
    <div style="color: #000000;">The undersigned hereby grants to such attorneys-in-fact, any such person signing individually, solely in connection with the undersigned&#8217;s ownership, acquisition or disposition of common stock of Amentum Holdings, Inc.,
      full power and authority to do and perform any and every act and thing requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could
      do if personally present, hereby ratifying and confirming that all such attorneys-in-fact, shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that none of
      the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, is assuming any of the undersigned&#8217;s responsibilities to comply with Sections 13(d) or 16(a) of the Securities Exchange Act of 1934, Rule 144 of the
      Securities Act of 1933 or any other rule or regulation of the SEC.</div>
    <div><br>
    </div>
    <div style="color: #000000;">With respect to the internal relationship between the undersigned and each attorney-in-fact, the undersigned undertakes to indemnify and hold harmless each attorney-in-fact from and against all costs, expenses, claims,
      obligations, any damage and any liability of whatever kind incurred by, or asserted against, such attorney-in-fact under or in connection with the agreed upon exercise of any rights granted under this Power of Attorney.</div>
    <div><br>
    </div>
    <div style="color: #000000;">This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Schedule 13D or Forms 3, 4, 5 and 144 with respect to the undersigned&#8217;s holdings of and transactions in
      Amentum Holdings, Inc., unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.</div>
    <div><br>
    </div>
    <div style="text-align: center;">[<font style="font-style: italic;">signature page follows</font>]</div>
    <div><br>
    </div>
    <div><br>
    </div>
    <div class="BRPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
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    <div style="color: #000000;"> <br>
    </div>
    <div style="color: #000000;">IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this <u>25th</u> day of September, 2024.</div>
    <div><br>
    </div>
    <div style="color: #000000; font-weight: bold;">STEVEN J. DEMETRIOU</div>
    <div><br>
    </div>
    <table cellspacing="0" cellpadding="0" border="0" id="z5be34d37b63f4c1a9949f9c33d1d7bfd" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; border-collapse: collapse; text-align: left; color: #000000;">

        <tr>
          <td style="width: 10%; vertical-align: top; padding-bottom: 2px;">
            <div style="color: #000000;">Signature:</div>
          </td>
          <td style="width: 31%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0);">/s/ Steven J. Demetriou</td>
          <td style="width: 59%; vertical-align: top; padding-bottom: 2px;">&#160;</td>
        </tr>
        <tr>
          <td style="width: 10%; vertical-align: top;">
            <div style="color: #000000;">Print Name:</div>
          </td>
          <td style="width: 31%; vertical-align: top;">
            <div style="color: #000000;">Steven J. Demetriou</div>
          </td>
          <td style="width: 59%; vertical-align: top;">&#160;</td>
        </tr>
        <tr>
          <td style="width: 10%; vertical-align: top;">
            <div style="color: #000000;">Title:</div>
          </td>
          <td style="width: 31%; vertical-align: top;">
            <div style="color: #000000;">Executive Chair and Director</div>
          </td>
          <td style="width: 59%; vertical-align: top;">&#160;</td>
        </tr>

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    </div>
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</SEC-DOCUMENT>
