TREX CO INC — Director's Dealing 2021

Nov 12, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2021-11-10

Reporting Person: Gupp William R. (Sr VP,Gen. Counsel & Secretary)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-11-10	Common Stock	S	2150	$131.00	Disposed	101305	Direct
2021-11-10	Common Stock	M	6640	$10.97	Acquired	107945	Direct
2021-11-10	Common Stock	D	286	$127.26	Disposed	107659	Direct
2021-11-10	Common Stock	F	2866	$127.26	Disposed	104793	Direct
2021-11-11	Common Stock	S	3488	$127.89	Disposed	101305	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-11-10	Stock Appreciation Right	$10.97	M	6640	Disposed	2023-02-12	Common Stock (6640)	Direct

Footnotes

F1: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 sales plan adopted by the reporting person on May 17,2021.

F2: Stock Appreciation Rights (SARs) are being exercised pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 17, 2021.

F3: 2,866 shares are being surrendered as allowed by the Company's 2014 Stock Incentive Plan to cover payment of taxes currently due on previously granted restricted shares.

F4: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 sales plan adopted by the reporting person on May 17, 2021.