<SEC-DOCUMENT>0000919574-23-005111.txt : 20230905
<SEC-HEADER>0000919574-23-005111.hdr.sgml : 20230905
<ACCEPTANCE-DATETIME>20230905101023
ACCESSION NUMBER:		0000919574-23-005111
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20230905
DATE AS OF CHANGE:		20230905

SUBJECT COMPANY:	

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

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	001-32833
		FILM NUMBER:		231234420

	BUSINESS ADDRESS:	
		STREET 1:		1301 EAST 9TH STREET
		STREET 2:		SUITE 3000
		CITY:			CLEVELAND
		STATE:			OH
		ZIP:			44114
		BUSINESS PHONE:		216 706 2960

	MAIL ADDRESS:	
		STREET 1:		1301 EAST 9TH STREET
		STREET 2:		SUITE 3000
		CITY:			CLEVELAND
		STATE:			OH
		ZIP:			44114

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TD HOLDING CORP
		DATE OF NAME CHANGE:	20030818

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Stockbridge Partners LLC
		CENTRAL INDEX KEY:			0001505183
		IRS NUMBER:				208051585
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144

	BUSINESS ADDRESS:	
		STREET 1:		200 CLARENDON STREET
		STREET 2:		35TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		617 227-0050

	MAIL ADDRESS:	
		STREET 1:		200 CLARENDON STREET
		STREET 2:		35TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Stockbridge Partners LLC (D/B/A Stockbridge Investors)
		DATE OF NAME CHANGE:	20120313

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Stockbridge Partners LLC
		DATE OF NAME CHANGE:	20101108
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <!-- Field: Pseudo-Tag; ID: Name; Data: Stockbridge Partners LLC -->
          <cik>0001505183</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001260221</issuerCik>
      <issuerName>TransDigm Group INC</issuerName>
      <secFileNumber>001-32833</secFileNumber>
      <issuerAddress>
        <com:street1>1301 East 9th Street, Suite 3000</com:street1>
        <com:city>Cleveland</com:city>
        <com:stateOrCountry>OH</com:stateOrCountry>
        <com:zipCode>44114</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>216-706-2960</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Stockbridge Partners LLC</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>May be deemed affiliate.</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Glen Eagle Wealth, LLC</name>
        <address>
          <com:street1>4428-C Route 27</com:street1>
          <com:city>Kingston</com:city>
          <com:stateOrCountry>NJ</com:stateOrCountry>
          <com:zipCode>08528</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>200000</noOfUnitsSold>
      <aggregateMarketValue>180770000.00</aggregateMarketValue>
      <noOfUnitsOutstanding>55183160</noOfUnitsOutstanding>
      <approxSaleDate>09/05/2023</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>04/25/2007</acquiredDate>
      <natureOfAcquisitionTransaction>Open market purchases</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Open market purchases</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>200000</amountOfSecuritiesAcquired>
      <paymentDate>04/25/2007</paymentDate>
      <natureOfPayment>Cash</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <remarks>Stockbridge Partners LLC is deemed to be the beneficial owner of the Common Stock held through a separate managed account and through Stockbridge Fund, L.P. Regarding the "Securities To Be Sold" Table, the dates of acquisition and payment of the Common Stock varied, commencing on the date reported in the Table. Stockbridge Partners LLC is signing this form on behalf of the separate managed account and Stockbridge Fund, L.P.</remarks>
    <noticeSignature>
      <noticeDate>09/05/2023</noticeDate>
      <signature>STOCKBRIDGE PARTNERS LLC, By: BPSP, L.P., its Managing Member, By: Berkshire Partners Holdings LLC, its General Partner, Kenneth S. Bring, its M.D.</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
