<SEC-DOCUMENT>0001193125-25-211595.txt : 20250922
<SEC-HEADER>0001193125-25-211595.hdr.sgml : 20250922
<ACCEPTANCE-DATETIME>20250922172626
ACCESSION NUMBER:		0001193125-25-211595
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250919
FILED AS OF DATE:		20250922
DATE AS OF CHANGE:		20250922

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SMALL ROBERT J
		CENTRAL INDEX KEY:			0001234544
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32833
		FILM NUMBER:		251330982

	MAIL ADDRESS:	
		STREET 1:		C/O BERKSHIRE PARTNERS LLC
		STREET 2:		200 CLARENDON STREET, 35TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TransDigm Group INC
		CENTRAL INDEX KEY:			0001260221
		STANDARD INDUSTRIAL CLASSIFICATION:	AIRCRAFT PART & AUXILIARY EQUIPMENT, NEC [3728]
		ORGANIZATION NAME:           	04 Manufacturing
		EIN:				510484716
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		1350 EUCLID AVENUE
		STREET 2:		SUITE 1600
		CITY:			CLEVELAND
		STATE:			OH
		ZIP:			44115
		BUSINESS PHONE:		216 706 2960

	MAIL ADDRESS:	
		STREET 1:		1350 EUCLID AVENUE
		STREET 2:		SUITE 1600
		CITY:			CLEVELAND
		STATE:			OH
		ZIP:			44115

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TD HOLDING CORP
		DATE OF NAME CHANGE:	20030818
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>ownership.xml
<DESCRIPTION>4/A
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2025-09-19</periodOfReport>

    <dateOfOriginalSubmission>2025-09-22</dateOfOriginalSubmission>

    <issuer>
        <issuerCik>0001260221</issuerCik>
        <issuerName>TransDigm Group INC</issuerName>
        <issuerTradingSymbol>TDG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001234544</rptOwnerCik>
            <rptOwnerName>SMALL ROBERT J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O BERKSHIRE PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>200 CLARENDON STREET, 35TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>false</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5625</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Prior Form 4 included the incorrect amount of common stock directly owned by the Reporting Person.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Gabrielle Feuer as attorney-in-fact</signatureName>
        <signatureDate>2025-09-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
