TREX CO INC — Director's Dealing 2013

Feb 22, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2013-02-20

Reporting Person: ANDREWS WILLIAM F (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-02-20	Common Stock	M	2684	$24.70	Acquired	15922	Direct
2013-02-20	Common Stock	M	3669	$18.05	Acquired	19591	Direct
2013-02-20	Common Stock	M	5938	$10.61	Acquired	25529	Direct
2013-02-20	Common Stock	M	3482	$14.86	Acquired	29011	Direct
2013-02-20	Common Stock	M	2457	$21.19	Acquired	31468	Direct
2013-02-20	Common Stock	M	1284	$21.15	Acquired	32752	Direct
2013-02-20	Common Stock	M	964	$28.35	Acquired	33716	Direct
2013-02-20	Common Stock	D	7415	$47.73	Disposed	26301	Direct
2013-02-21	Common Stock	M	2000	$43.47	Acquired	28301	Direct
2013-02-21	Common Stock	M	2000	$25.44	Acquired	30301	Direct
2013-02-21	Common Stock	S	13063	$45.3524	Disposed	17238	Direct
2013-02-21	Common Stock	S	4000	$45.01	Disposed	13238	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-02-20	Stock Appreciation Right	$24.70	M	2684	Disposed	2016-07-20	Common Stock (2684)	Direct
2013-02-20	Stock Appreciation Right	$18.05	M	3669	Disposed	2017-07-17	Common Stock (3669)	Direct
2013-02-20	Stock Appreciation Right	$10.61	M	5938	Disposed	2018-07-22	Common Stock (5938)	Direct
2013-02-20	Stock Appreciation Right	$14.86	M	3482	Disposed	2019-07-21	Common Stock (3482)	Direct
2013-02-20	Stock Appreciation Right	$21.19	M	2457	Disposed	2020-07-20	Common Stock (2457)	Direct
2013-02-20	Stock Appreciation Right	$21.15	M	1284	Disposed	2021-07-26	Common Stock (1284)	Direct
2013-02-20	Stock Appreciation Right	$28.35	M	964	Disposed	2022-07-24	Common Stock (964)	Direct
2013-02-21	Stock Options (Right to Buy)	$43.47	M	2000	Disposed	2014-07-27	Common Stock (2000)	Direct
2013-02-21	Stock Options (Right to Buy)	$25.44	M	2000	Disposed	2015-07-21	Common Stock (2000)	Direct

Footnotes

F1: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions ranging in price from $44.88 to $45.78, inclusive. The reporting person undertakes to provide the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (1) to this Form 4.

F2: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $44.88 to $45.235, inclusive. The reporting person undertakes to provide the Company, any security holder of the Company or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4.