TREX CO INC - Director's Dealing 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2012-03-15

Reporting Person: Cline James E (Vice President and CFO)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-03-15	Common Stock	S	200	$28.86	Disposed	44.371	Direct
2012-03-15	Common Stock	S	300	$28.87	Disposed	44071	Direct
2012-03-15	Common Stock	S	300	$28.88	Disposed	43771	Direct
2012-03-15	Common Stock	S	2600	$28.89	Disposed	41171	Direct
2012-03-15	Common Stock	S	300	$28.90	Disposed	40871	Direct
2012-03-15	Common Stock	S	200	$28.91	Disposed	40671	Direct
2012-03-15	Common Stock	S	959	$28.92	Disposed	39712	Direct
2012-03-15	Common Stock	S	100	$28.92	Disposed	39612	Direct
2012-03-15	Common Stock	S	500	$28.93	Disposed	39112	Direct
2012-03-15	Common Stock	S	100	$28.935	Disposed	39012	Direct
2012-03-15	Common Stock	S	400	$28.94	Disposed	38612	Direct
2012-03-15	Common Stock	S	400	$28.95	Disposed	38212	Direct
2012-03-15	Common Stock	S	600	$28.96	Disposed	37612	Direct
2012-03-15	Common Stock	S	374	$28.97	Disposed	37238	Direct
2012-03-15	Common Stock	S	300	$28.98	Disposed	36938	Direct
2012-03-15	Common Stock	S	300	$28.99	Disposed	36638	Direct
2012-03-15	Common Stock	S	200	$29.00	Disposed	36438	Direct
2012-03-15	Common Stock	S	100	$29.01	Disposed	36338	Direct
2012-03-15	Common Stock	S	100	$29.035	Disposed	36238	Direct
2012-03-15	Common Stock	S	56	$29.05	Disposed	36182	Direct
2012-03-15	Common Stock	S	100	$29.07	Disposed	36082	Direct

F1: The sales reported in this Form 4 were effected pursuant to Rule 10b5-1 trading plan adopted by the reporting person on February 28, 2012