TREX CO INC — Director's Dealing 2011

Apr 5, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2011-04-01

Reporting Person: ROBINSON PATRICIA B (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-04-01	Common Stock	M	233	$31.01	Acquired	233	Direct
2011-04-01	Common Stock	S	233	$32.78	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-04-01	Stock Options (Right to Buy)	$31.01	M	233	Disposed	2011-04-02	Common Stock (233)	Direct

Footnotes

F1: The exercise of options reported on this Form 4 were effected pursuant to Rule 10b5-1 trading plan adopted by the reporting person on March 4, 2011.

F2: The sales reported in this Form 4 were effected pursuant to Rule 10b5-1 trading plan adopted by the reporting person on March 4, 2011.