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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1069878	Trex Co Inc	TREX	Lumber & Wood Products (No Furniture) (2400)	541910453

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1512909	Dante Adam Zambanini	160 Exeter Drive Winchester VA 22603	Vice President, Marketing	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2012-08-20	1,119	$9.14	9,550	No	4	M	Direct
Common Stock	Acquisiton	2012-08-20	2,729	$13.44	12,279	No	4	M	Direct
Common Stock	Disposition	2012-08-20	1,597	$29.36	10,682	No	4	D	Direct
Common Stock	Disposition	2012-08-20	799	$29.36	9,883	No	4	F	Direct
Common Stock	Disposition	2012-08-21	300	$29.02	9,583	No	4	S	Direct
Common Stock	Disposition	2012-08-21	100	$29.03	9,483	No	4	S	Direct
Common Stock	Disposition	2012-08-21	280	$29.04	9,203	No	4	S	Direct
Common Stock	Disposition	2012-08-22	1,152	$29.19	8,051	No	4	S	Direct
Common Stock	Disposition	2012-08-22	200	$29.21	7,851	No	4	S	Direct
Common Stock	Disposition	2012-08-22	100	$29.22	7,751	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	M	Direct
No	4	D	Direct
No	4	F	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Appreciation Right	Disposition	2012-08-20	1,119	$0.00	1,119	$9.14
Common Stock	Stock Appreciation Right	Disposition	2012-08-20	2,729	$0.00	2,729	$13.44

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2009-05-07	2019-05-07	No	4	M	Direct
0	2010-02-18	2018-02-18	No	4	M	Direct

Footnotes

799 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.
This stock appreciation right becomes exercisable in approximately three equal annual installments beginning on the first anniversary of the May 7, 2008 grant date.
This stock appreciation right becomes exercisable in approximately three equal annual installments beginning on the first anniversary of the February 18, 2009 grant date.