TREX CO INC — Director's Dealing 2021

Feb 19, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2021-02-17

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-02-17	Common Stock	A	1893	$104.56	Acquired	103244	Direct
2021-02-17	Common Stock	A	2704	$104.56	Acquired	105948	Direct
2021-02-17	Common Stock	A	1998	$104.56	Acquired	107946	Direct
2021-02-17	Common Stock	F	3931	$104.56	Disposed	104015	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-02-17	Stock Appreciation Right	$104.56	A	1636	Acquired	2031-02-17	Common Stock (1636)	Direct

Footnotes

F1: This restricted stock unit vests over a three-year period in three equal annual installments beginning on the first anniversary of the grant date.

F2: This restricted stock unit award is performance-based, and vests over a three-year period in three equal installments beginning on the first anniversary of the grant date. 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.

F3: The stock appreciation right becomes exercisable in three equal installments beginning on the first anniversary of the grant date.

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

F5: 3,931 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.