TREX CO INC — Director's Dealing 2012

Jul 5, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2012-07-02

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-07-02	Common Stock	M	12000	$9.14	Acquired	48082	Direct
2012-07-02	Common Stock	D	3530	$31.07	Disposed	44552	Direct
2012-07-02	Common Stock	F	3575	$31.07	Disposed	40977	Direct
2012-07-05	Common Stock	S	200	$30.31	Disposed	40777	Direct
2012-07-05	Common Stock	S	400	$30.32	Disposed	40377	Direct
2012-07-05	Common Stock	S	600	$30.33	Disposed	39777	Direct
2012-07-05	Common Stock	S	100	$30.35	Disposed	39677	Direct
2012-07-05	Common Stock	S	100	$30.36	Disposed	39577	Direct
2012-07-05	Common Stock	S	200	$30.41	Disposed	39377	Direct
2012-07-05	Common Stock	S	200	$30.46	Disposed	39177	Direct
2012-07-05	Common Stock	S	200	$30.47	Disposed	38977	Direct
2012-07-05	Common Stock	S	400	$30.48	Disposed	38577	Direct
2012-07-05	Common Stock	S	200	$30.50	Disposed	38377	Direct
2012-07-05	Common Stock	S	300	$30.51	Disposed	38077	Direct
2012-07-05	Common Stock	S	100	$30.52	Disposed	37977	Direct
2012-07-05	Common Stock	S	100	$30.54	Disposed	37877	Direct
2012-07-05	Common Stock	S	100	$30.56	Disposed	37777	Direct
2012-07-05	Common Stock	S	300	$30.62	Disposed	37477	Direct
2012-07-05	Common Stock	S	400	$30.63	Disposed	37077	Direct
2012-07-05	Common Stock	S	200	$30.65	Disposed	36877	Direct
2012-07-05	Common Stock	S	100	$30.67	Disposed	36777	Direct
2012-07-05	Common Stock	S	500	$30.76	Disposed	36277	Direct
2012-07-05	Common Stock	S	195	$30.78	Disposed	36082	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-07-02	Stock Appreciation Right	$9.14	M	12000	Disposed	2018-05-07	Common Stock (12000)	Direct

Footnotes

F1: 12,000 Stock Appreciation Rights are being exercised pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 28, 2012.

F2: 3,575 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 February 28, 2012.

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