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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
1463613	Mitchell James Cox	C/O Trex Company, Inc 160 Exeter Drive Winchester VA 22603-8605	Vice President, Sales	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	2012-08-16	9,700	$24.17	129,047	No	4	M	Direct
Common Stock	Acquisiton	2012-08-16	6,825	$25.37	135,872	No	4	M	Direct
Common Stock	Acquisiton	2012-08-16	3,413	$25.37	139,285	No	4	M	Direct
Common Stock	Acquisiton	2012-08-16	37,049	$9.14	176,334	No	4	M	Direct
Common Stock	Acquisiton	2012-08-16	21,519	$13.44	197,853	No	4	M	Direct
Common Stock	Acquisiton	2012-08-16	9,948	$17.41	207,801	No	4	M	Direct
Common Stock	Acquisiton	2012-08-16	3,515	$26.20	211,316	No	4	M	Direct
Common Stock	Disposition	2012-08-16	47,172	$29.41	164,144	No	4	D	Direct
Common Stock	Disposition	2012-08-16	18,810	$29.41	145,334	No	4	F	Direct
Common Stock	Disposition	2012-08-16	16,909	$29.51	128,425	No	4	S	Direct
Common Stock	Disposition	2012-08-16	10,000	$29.61	118,425	No	4	S	Direct
Common Stock	Disposition	2012-08-17	35,862	$29.97	82,563	No	4	S	Direct
Common Stock	Disposition	2012-08-28	4,044	$30.14	78,519	No	4	S	Direct
Common Stock	Disposition	2012-08-29	3,185	$30.14	75,334	No	4	S	Direct
Common Stock	Disposition	2012-08-29	7,553	$30.29	67,781	No	4	S	Direct
Common Stock	Disposition	2012-08-31	12,447	$30.29	55,334	No	4	S	Direct
Common Stock	Disposition	2012-08-31	20,000	$30.77	35,334	No	4	S	Direct
Common Stock	Disposition	2012-09-13	6,419	$33.26	28,915	No	4	S	Direct
Common Stock	Disposition	2012-09-13	10,000	$33.04	18,915	No	4	S	Direct
Common Stock	Disposition	2012-09-13	359	$33.50	18,556	No	4	S	Direct
Common Stock	Disposition	2012-09-13	18,556	$33.50	0	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	M	Direct
No	4	M	Direct
No	4	M	Direct
No	4	M	Direct
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
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	2012-08-16	9,700	$0.00	9,700	$24.17
Common Stock	Stock Appreciation Right	Disposition	2012-08-16	6,825	$0.00	6,825	$25.37
Common Stock	Stock Appreciation Right	Disposition	2012-08-16	3,413	$0.00	3,413	$25.37
Common Stock	Stock Appreciation Right	Disposition	2012-08-16	37,049	$0.00	37,049	$9.14
Common Stock	Stock Appreciation Right	Disposition	2012-08-16	21,519	$0.00	21,519	$13.44
Common Stock	Stock Appreciation Right	Disposition	2012-08-16	9,948	$0.00	9,948	$17.41
Common Stock	Stock Appreciation Right	Disposition	2012-08-16	3,515	$0.00	3,515	$26.20

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2009-05-07	2016-02-08	No	4	M	Direct
0	2009-05-07	2017-02-21	No	4	M	Direct
0	2010-02-21	2017-02-21	No	4	M	Direct
0	2011-05-07	2018-05-07	No	4	M	Direct
0	2010-02-18	2019-02-18	No	4	M	Direct
4,972	2011-02-17	2020-02-17	No	4	M	Direct
7,029	2012-02-16	2022-02-16	No	4	M	Direct

Footnotes

18,810 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 is fully exercisable.
This stock appreciation right becomes exercisable in three equal annual installments beginning on the first anniversary of the grant date.