TREX CO INC — Director's Dealing 2012

Dec 5, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2012-12-03

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-12-03	Common Stock	M	2930	$9.14	Acquired	48645	Direct
2012-12-03	Common Stock	D	663	$40.41	Disposed	47982	Direct
2012-12-03	Common Stock	F	957	$40.41	Disposed	47025	Direct
2012-12-05	Common Stock	S	1310	$40.61	Disposed	45715	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-12-03	Stock Appreciation Right	$9.14	M	2930	Disposed	2018-05-07	Common Stock (2930)	Direct

Footnotes

F1: 2,930 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: 957 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.