TREX CO INC — Director's Dealing 2013

May 31, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2013-05-30

Reporting Person: ROBINSON PATRICIA B (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-05-30	Common Stock	M	218	$39.25	Acquired	1456	Direct
2013-05-30	Common Stock	M	1500	$37.29	Acquired	2956	Direct
2013-05-30	Common Stock	F	1159	$55.63	Disposed	1797	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-05-30	Stock Options (Right to Buy)	$39.25	M	218	Disposed	2013-06-30	Common Stock (218)	Direct
2013-05-30	Stock Options (Right to Buy)	$37.29	M	1500	Disposed	2013-07-24	Common Stock (1500)	Direct