TREX CO INC — Director's Dealing 2013

Jul 3, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2013-07-01

Reporting Person: Reese F Timothy (Vice President, Operations)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-07-01	Common Stock	M	4211	$13.44	Acquired	47019	Direct
2013-07-01	Common Stock	D	1202	$47.08	Disposed	45817	Direct
2013-07-01	Common Stock	F	1436	$47.08	Disposed	44381	Direct
2013-07-03	Common Stock	S	500	$45.00	Disposed	43881	Direct
2013-07-03	Common Stock	S	100	$45.03	Disposed	43781	Direct
2013-07-03	Common Stock	S	100	$45.14	Disposed	43681	Direct
2013-07-03	Common Stock	S	100	$45.158	Disposed	43581	Direct
2013-07-03	Common Stock	S	200	$45.25	Disposed	43381	Direct
2013-07-03	Common Stock	S	98	$45.45	Disposed	43283	Direct
2013-07-03	Common Stock	S	173	$45.51	Disposed	43110	Direct
2013-07-03	Common Stock	S	202	$45.52	Disposed	42908	Direct
2013-07-03	Common Stock	S	100	$45.56	Disposed	42808	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-07-01	Stock Appreciation Right	$13.44	M	4211	Disposed	2019-02-18	Common Stock (4211)	Direct

Footnotes

F1: 4,211 Stock Appreciation Rights (SARs) are being exercised pursuant to a Rule 10b5-1 SAR Exercise plan adopted by the reporting person on February 20, 2013.

F2: 1,436 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 stock appreciation rights.

F3: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 20, 2013.

F4: The stock appreciation right becomes exercisable in three equal installments beginning on the first anniversary of the grant date.