William R. Gupp - Nov 10, 2021 Form 4 Insider Report for TREX CO INC (TREX)

Role: Sr VP,Gen. Counsel & Secretary
Signature: /s/ William R. Gupp by power of attorney
Stock symbol: TREX
Transactions as of: Nov 10, 2021
Transactions value $: -$1,056,013
Form type: 4
Date filed: 11/12/2021, 09:16 AM
Previous filing: May 13, 2021
Next filing: Feb 15, 2022
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TREX	Common Stock	Sale	-$282K	-2.15K	-2.08%	$131.00	101K	Nov 10, 2021	Direct	F1
transaction	TREX	Common Stock	Options Exercise	$72.8K	+6.64K	+6.55%	$10.97^*	108K	Nov 10, 2021	Direct	F2
transaction	TREX	Common Stock	Disposed to Issuer	-$36.4K	-286	-0.26%	$127.26	108K	Nov 10, 2021	Direct
transaction	TREX	Common Stock	Tax liability	-$365K	-2.87K	-2.66%	$127.26	105K	Nov 10, 2021	Direct	F3
transaction	TREX	Common Stock	Sale	-$446K	-3.49K	-3.33%	$127.89	101K	Nov 11, 2021	Direct	F4

Showing 1 to 5 of 5 entries

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	TREX	Stock Appreciation Right	Options Exercise	$0	-6.64K	-100%	$0.00^*	0	Nov 10, 2021	Common Stock	6.64K	$10.97	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
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.