TREX CO INC — Director's Dealing 2012

Nov 7, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2012-11-02

Reporting Person: KAPLAN RONALD W (Director, President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-11-02	Common Stock	M	57921	$9.14	Acquired	187019	Direct
2012-11-02	Common Stock	D	13478	$39.28	Disposed	173541	Direct
2012-11-02	Common Stock	F	18755	$39.28	Disposed	154786	Direct
2012-11-02	Common Stock	S	18067	$39.00	Disposed	136719	Direct
2012-11-02	Common Stock	S	800	$39.01	Disposed	135919	Direct
2012-11-02	Common Stock	S	1150	$39.02	Disposed	134769	Direct
2012-11-02	Common Stock	S	200	$39.03	Disposed	134569	Direct
2012-11-06	Common Stock	S	24588	$39.45	Disposed	109981	Direct
2012-11-06	Common Stock	S	400	$39.46	Disposed	109581	Direct
2012-11-06	Common Stock	S	600	$39.47	Disposed	108981	Direct
2012-11-06	Common Stock	S	100	$39.48	Disposed	108881	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-11-02	Stock Appreciation Right	$9.14	M	57921	Disposed	2018-05-07	Common Stock (57921)	Direct

Footnotes

F1: 57,921 Stock Appreciation Rights (SARs) are being exercised pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on July 31, 2012.

F2: 18,755 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 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.