<SEC-DOCUMENT>0001973379-25-000213.txt : 20250806
<SEC-HEADER>0001973379-25-000213.hdr.sgml : 20250806
<ACCEPTANCE-DATETIME>20250806122437
ACCESSION NUMBER:		0001973379-25-000213
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250806
DATE AS OF CHANGE:		20250806

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TREX CO INC
		CENTRAL INDEX KEY:			0001069878
		STANDARD INDUSTRIAL CLASSIFICATION:	LUMBER & WOOD PRODUCTS (NO FURNITURE) [2400]
		ORGANIZATION NAME:           	04 Manufacturing
		EIN:				541910453
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	001-14649
		FILM NUMBER:		251188559

	BUSINESS ADDRESS:	
		STREET 1:		2500 TREX WAY
		CITY:			WINCHESTER
		STATE:			VA
		ZIP:			22601
		BUSINESS PHONE:		5405426300

	MAIL ADDRESS:	
		STREET 1:		2500 TREX WAY
		CITY:			WINCHESTER
		STATE:			VA
		ZIP:			22601

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Fernandez Amy M.
		CENTRAL INDEX KEY:			0001987902
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		2500 TREX WAY
		CITY:			WINCHESTER
		STATE:			VA
		ZIP:			22601
</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>
          <cik>0001987902</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001069878</issuerCik>
      <issuerName>TREX CO INC</issuerName>
      <secFileNumber>001-14649</secFileNumber>
      <issuerAddress>
        <com:street1>2500 TREX WAY</com:street1>
        <com:city>WINCHESTER</com:city>
        <com:stateOrCountry>VA</com:stateOrCountry>
        <com:zipCode>22601</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>5405426300</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Fernandez Amy M.</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
        <relationshipToIssuer>SVP, CLO and Secretary</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Citigroup Global Markets, Inc.</name>
        <address>
          <com:street1>390 Greenwich Street</com:street1>
          <com:city>New York</com:city>
          <com:stateOrCountry>NY</com:stateOrCountry>
          <com:zipCode>10013</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>1538</noOfUnitsSold>
      <aggregateMarketValue>98939.54</aggregateMarketValue>
      <noOfUnitsOutstanding>107234320</noOfUnitsOutstanding>
      <approxSaleDate>08/06/2025</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>08/06/2025</acquiredDate>
      <natureOfAcquisitionTransaction>Stock Vesting</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Trex Company, Inc.</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>1538</amountOfSecuritiesAcquired>
      <paymentDate>08/06/2025</paymentDate>
      <natureOfPayment>Services Rendered</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Amy Fernandez</name>
        <address>
          <com:street1>160 Exeter Drive</com:street1>
          <com:city>Winchester</com:city>
          <com:stateOrCountry>VA</com:stateOrCountry>
          <com:zipCode>22603</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>05/12/2025</saleDate>
      <amountOfSecuritiesSold>2366</amountOfSecuritiesSold>
      <grossProceeds>144731.14</grossProceeds>
    </securitiesSoldInPast3Months>
    <remarks>Stocks were acquired March 2025</remarks>
    <noticeSignature>
      <noticeDate>08/06/2025</noticeDate>
      <signature>Conformed Signature on File</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
