TREX CO INC — Director's Dealing 2013

Feb 5, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2013-02-01

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-02-01	Common Stock	M	3594	$9.14	Acquired	49309	Direct
2013-02-01	Common Stock	D	782	$42.03	Disposed	48527	Direct
2013-02-01	Common Stock	F	1342	$42.03	Disposed	47185	Direct
2013-02-05	Common Stock	S	160	$41.15	Disposed	47025	Direct
2013-02-05	Common Stock	S	300	$41.25	Disposed	46725	Direct
2013-02-05	Common Stock	S	100	$41.32	Disposed	46625	Direct
2013-02-05	Common Stock	S	100	$41.33	Disposed	46525	Direct
2013-02-05	Common Stock	S	200	$41.37	Disposed	46325	Direct
2013-02-05	Common Stock	S	100	$41.40	Disposed	46225	Direct
2013-02-05	Common Stock	S	200	$41.42	Disposed	46025	Direct
2013-02-05	Common Stock	S	40	$41.45	Disposed	45985	Direct
2013-02-05	Common Stock	S	100	$41.55	Disposed	45885	Direct
2013-02-05	Common Stock	S	100	$41.56	Disposed	45785	Direct
2013-02-05	Common Stock	S	70	$41.60	Disposed	45715	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-02-01	Stock Appreciation Right	$9.14	M	3594	Disposed	2018-05-07	Common Stock (3594)	Direct

Footnotes

F1: 3,594 Stock Appreciation Rights (SARs) are being exercised pursuant to a Rule 10b5-1 SAR Exercise plan adopted by the reporting person on July 31, 2012.

F2: 1,342 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.

F3: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on July 31, 2012.

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