TREX CO INC — Director's Dealing 2011

Dec 28, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2011-12-28

Reporting Person: ROBINSON PATRICIA B (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-12-28	Common Stock	M	383	$18.99	Acquired	1092	Direct
2011-12-28	Common Stock	S	383	$23.08	Disposed	709	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-12-28	Stock Options (Right to Buy)	$18.99	M	383	Disposed	2012-01-02	Common Stock (383)	Direct

Footnotes

F1: The sale reported in this Form 4 were effected pursuant to Rule 10b5-1 trading plan adopted by the reporting person on December 12, 2011.