TREX CO INC - Director's Dealing 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2011-05-03

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

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-05-03	Common Stock	M	6000	$20.00	Acquired	42609	Direct
2011-05-03	Common Stock	S	100	$30.49	Disposed	42509	Direct
2011-05-03	Common Stock	S	535	$30.50	Disposed	41974	Direct
2011-05-03	Common Stock	S	100	$30.535	Disposed	41874	Direct
2011-05-03	Common Stock	S	300	$30.56	Disposed	41574	Direct
2011-05-03	Common Stock	S	165	$30.51	Disposed	41409	Direct
2011-05-03	Common Stock	S	100	$30.53	Disposed	41309	Direct
2011-05-03	Common Stock	S	100	$30.515	Disposed	41209	Direct
2011-05-03	Common Stock	S	900	$30.4701	Disposed	40309	Direct
2011-05-03	Common Stock	S	1200	$30.46	Disposed	39109	Direct
2011-05-03	Common Stock	S	400	$30.47	Disposed	38709	Direct
2011-05-03	Common Stock	S	100	$30.57	Disposed	38609	Direct
2011-05-03	Common Stock	S	200	$30.55	Disposed	38409	Direct
2011-05-03	Common Stock	S	100	$30.65	Disposed	38309	Direct
2011-05-03	Common Stock	S	200	$30.655	Disposed	38109	Direct
2011-05-03	Common Stock	S	500	$30.67	Disposed	37609	Direct
2011-05-03	Common Stock	S	200	$30.73	Disposed	37409	Direct
2011-05-03	Common Stock	S	100	$30.74	Disposed	37309	Direct
2011-05-03	Common Stock	S	300	$30.77	Disposed	37009	Direct
2011-05-03	Common Stock	S	200	$30.79	Disposed	36809	Direct
2011-05-03	Common Stock	S	100	$30.78	Disposed	36709	Direct
2011-05-03	Common Stock	S	100	$30.80	Disposed	36609	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-05-03	Stock Options (Right to Buy)	$20.00	M	6000	Disposed	2012-02-21	Common Stock (6000)	Direct