TREX CO INC — Director's Dealing 2012

May 3, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2012-05-01

Reporting Person: Reese F Timothy (Vice President, Operations)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-01	Common Stock	M	3037	$8.20	Acquired	33636	Direct
2012-05-01	Common Stock	D	784	$31.78	Disposed	32852	Direct
2012-05-01	Common Stock	F	951	$31.78	Disposed	31901	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-01	Stock Appreciation Right	$8.20	M	3037	Disposed	2018-02-05	Common Stock (3037)	Direct

Footnotes

F1: The sales reported in this Form 4 were effected pursuant to Rule 10b5-1 trading plans adopted by the reporting person on May 18, 2011.

F2: The stock appreciation right becomes exerciseable in three equal installments beginning on the first anniversary date of the transaction date.

F3: 951 shares are being surrendered as allowed by the Company's 2005 Stock Incentive Plan to cover the payment of taxes currently due on the exercise of SARs.