TREX CO INC — Director's Dealing 2021

May 13, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2021-05-12

Reporting Person: Posey Richard E (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-12	Common Stock	M	1392	$4.32	Acquired	37538	Direct
2021-05-12	Common Stock	M	1280	$4.82	Acquired	38818	Direct
2021-05-12	Common Stock	D	124	$99.11	Disposed	38694	Direct
2021-05-12	Common Stock	G	1552	—	Disposed	37142	Direct
2021-05-13	Common Stock	S	2548	$99.99	Disposed	34594	Direct
2021-05-13	Common Stock	S	3872	$102.37	Disposed	30722	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-05-12	Stock Appreciation Right	$4.32	M	1392	Disposed	2022-10-01	Common Stock (1392)	Direct
2021-05-12	Stock Appreciation Right	$4.82	M	1280	Disposed	2023-01-02	Common Stock (1280)	Direct