TREX CO INC — Director's Dealing 2012

Feb 21, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2012-02-16

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-16	Common Stock	F	907	$26.50	Disposed	38824	Direct
2012-02-17	Common Stock	F	2604	$26.73	Disposed	36220	Direct
2012-02-17	Common Stock	M	2009	$20.00	Acquired	38229	Direct
2012-02-17	Common Stock	S	2009	$26.52	Disposed	36220	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-02-17	Stock Options (Right to Buy)	$20.00	M	2009	Disposed	2012-02-21	Common Stock (2009)	Direct

Footnotes

F1: 907 shares are being surrendered as allowed by the Company's 2005 Stock Incentive Plan to cover the payment of taxes currently due on previously granted restricted shares

F2: 2,604 shares are being surrendered as allowed by the Company's 2005 Stock Incentive Plan to cover the payment of taxes currently due on previously granted restricted shares.

F3: Options exercised prior to expiration date of 2/21/2012, and resulting shares sold, pursuant to Rule 10b5-1 trading plan adopted by the reporting person on December 12, 2011.