TREX CO INC — Director's Dealing 2015

May 15, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2015-05-13

Reporting Person: Cline James E (Senior Vice President and CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-05-13	Common Stock	M	10979	$8.705	Acquired	76851	Direct
2015-05-13	Common Stock	D	1958	$48.80	Disposed	74893	Direct
2015-05-13	Common Stock	F	4304	$48.80	Disposed	70589	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-05-13	Stock Appreciation Right	$8.705	M	10979	Disposed	2020-02-17	Common Stock (10979)	Direct

Footnotes

F1: Stock Appreciation Rights are being exercised pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 15, 2014.

F2: 4,304 shares are being surrendered as allowed by the Company's 2005 Stock Incentive Plan to cover the payment of taxes currently due on the exercise of SARs.