TREX CO INC — Director's Dealing 2023

Feb 16, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2023-02-14

Reporting Person: Schemm Dennis Charles (SVP, Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2023-02-14	Common Stock	A	6076	$56.80	Acquired	23431	Direct
2023-02-14	Common Stock	A	8680	$56.80	Acquired	32111	Direct
2023-02-14	Common Stock	A	1494	$56.80	Acquired	33605	Direct
2023-02-14	Common Stock	F	1890	$56.80	Disposed	31715	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2023-02-14	Stock Appreciation Right	$56.80	A	5439	Acquired	2033-02-14	Common Stock (5439)	Direct

Footnotes

F1: This restricted stock unit vests over a three-year period in three equal annual installments occurring March 1,2024, March 1, 2025 and March 1, 2026.

F2: Includes 189 shares acquired under the Company ESPP in March 2022

F3: This restricted stock unit award is performance-based, and vests over a three-year period in three equal installments occurring March 1,2024, March 1, 2025 and March 1, 2026. The number of shares set forth above is the target number of shares. The number of shares that will actually vest each year will be based upon performance against certain financial goals for the Company, and will range from 0% to 200% of the target number of shares.

F4: Represents net share difference between target performance-based shares and actual vested shares, based upon actual performance for the Company.

F5: 1,890 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 stock units.

F6: The stock appreciation right becomes exercisable in three equal installments occurring March 1,2024, March 1, 2025 and March 1, 2026.