TREX CO INC — Director's Dealing 2020

Nov 5, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2020-11-03

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-11-03	Common Stock	M	14000	$5.485	Acquired	116960	Direct
2020-11-03	Common Stock	D	1083	$70.90	Disposed	115877	Direct
2020-11-03	Common Stock	F	5877	$70.90	Disposed	110000	Direct
2020-11-04	Common Stock	S	2241	$71.73	Disposed	107759	Direct
2020-11-04	Common Stock	S	4699	$72.34	Disposed	103060	Direct
2020-11-04	Common Stock	S	100	$73.24	Disposed	102960	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-11-03	Stock Appreciation Right	$5.485	M	14000	Disposed	2023-02-12	Common Stock (14000)	Direct

Footnotes

F1: Stock Appreciation Rights (SARs) are being exercised pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 5, 2020.

F2: On September 14, 2020, the Company effectuated a two-for-one stock split to common shareholders of record on August 19,2020. The amounts set forth in this Form 4 and all subsequent reports filed report the amounts adjusted to reflect the stock split.

F3: Shares are being surrendered as allowed by the Company's 2014 Stock Incentive Plan to cover payment of taxes currently due on previously granted SARs.

F4: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 sales plan adopted by the reporting person on August 5, 2020.

F5: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $81.6467 to $82.7625, inclusive.

F6: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $81.6467 to $82.7625, inclusive.