TREX CO INC — Director's Dealing 2014

May 13, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2014-05-09

Reporting Person: Gupp William R. (CAO, Gen. Counsel & Secretary)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-05-09	Common Stock	S	3900	$33.07	Disposed	63746	Direct

Footnotes

F1: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 25, 2014.

F2: On May 7, 2014, the common stock of the Trex Company, Inc. split two-for-one, resulting in additional shares of ownership for the reporting person. All future Form 4 filings made by the reporting person will include adjustments, as necessary, to reflect the stock split.