TREX CO INC — Director's Dealing 2013

Jan 31, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2013-01-29

Reporting Person: ANDREWS WILLIAM F (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-01-29	Common Stock	M	218	$39.25	Acquired	13456	Direct
2013-01-29	Common Stock	S	218	$43.1833	Disposed	13238	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-01-29	Stock Options (Right to Buy)	$39.25	M	218	Disposed	2013-06-30	Common Stock (218)	Direct

Footnotes

F1: Stock Options are being exercised pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 5, 2012.

F2: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 5, 2012.