TREX CO INC — Director's Dealing 2020

May 7, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2020-05-06

Reporting Person: Posey Richard E (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-05-06	Common Stock	M	3856	$7.0875	Acquired	20926	Direct
2020-05-06	Common Stock	D	245	$111.95	Disposed	20681	Direct
2020-05-07	Common Stock	S	2900	$112.1183	Disposed	17781	Direct
2020-05-07	Common Stock	S	100	$112.75	Disposed	17681	Direct
2020-05-07	Common Stock	S	611	$113.78	Disposed	17070	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-05-06	Stock Appreciation Right	$7.0875	M	3856	Disposed	2022-07-24	Common Stock (3856)	Direct

Footnotes

F1: This transaction was executed in multiple trades at prices ranging from $111.65 to $112.47, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares and prices at which the transaction was effected.