TREX CO INC — Director's Dealing 2012

Mar 15, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2012-03-13

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-03-13	Common Stock	M	24000	$7.52	Acquired	65108	Direct
2012-03-13	Common Stock	D	6198	$29.12	Disposed	58910	Direct
2012-03-13	Common Stock	F	7513	$29.12	Disposed	51397	Direct
2012-03-14	Common Stock	S	4526	$29.46	Disposed	46871	Direct
2012-03-14	Common Stock	S	300	$29.47	Disposed	46571	Direct
2012-03-14	Common Stock	S	200	$29.505	Disposed	46371	Direct
2012-03-15	Common Stock	S	100	$28.65	Disposed	46271	Direct
2012-03-15	Common Stock	S	100	$28.66	Disposed	46171	Direct
2012-03-15	Common Stock	S	200	$28.70	Disposed	45971	Direct
2012-03-15	Common Stock	S	100	$28.72	Disposed	45871	Direct
2012-03-15	Common Stock	S	100	$28.73	Disposed	45771	Direct
2012-03-15	Common Stock	S	200	$28.75	Disposed	45571	Direct
2012-03-15	Common Stock	S	100	$28.76	Disposed	45471	Direct
2012-03-15	Common Stock	S	100	$28.77	Disposed	45371	Direct
2012-03-15	Common Stock	S	100	$28.78	Disposed	45271	Direct
2012-03-15	Common Stock	S	100	$28.79	Disposed	45171	Direct
2012-03-15	Common Stock	S	100	$28.80	Disposed	45071	Direct
2012-03-15	Common Stock	S	100	$28.83	Disposed	44971	Direct
2012-03-15	Common Stock	S	300	$28.84	Disposed	44671	Direct
2012-03-15	Common Stock	S	100	$28.85	Disposed	44571	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-03-13	Stock Appreciation Right	$7.52	M	24000	Disposed	2018-03-03	Common Stock (24000)	Direct

Footnotes

F1: 7,513 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.

F2: This stock appreciation right becomes exerciseable in approximately three equal installments beginning on the first anniversary of the March 3, 2008 grant date.

F3: 24,000 Stock Appreciation Rights are being exercised pursuant to Rule 10b5-1 trading plan adopted by the reporting person on February 28, 2012.

F4: The sales reported in this Form 4 were effected pursuant to Rule 10b5-1 trading plan adopted by the reporting person on February 28, 2012.