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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
1428106	R. William Gupp	C/O Trex Company, Inc. 160 Exeter Drive Winchester VA 22603-8605	Cao, Gen. Counsel & Secretary	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	2012-11-01	1,418	$9.14	50,272	No	4	M	Direct
Common Stock	Disposition	2012-11-01	348	$37.28	49,924	No	4	D	Direct
Common Stock	Disposition	2012-11-01	452	$37.28	49,472	No	4	F	Direct
Common Stock	Disposition	2012-11-01	750	$36.61	48,722	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	D	Direct
No	4	F	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	2012-11-01	1,418	$0.00	1,418	$9.14

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

Footnotes

1,418 Stock Appreciation Rights (SARs) are being exercised pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 14, 2011
452 shares are being surrendered as allowed by the Company's 2005 Stock Incentive Plan to cover payment of taxes currently due on the exercise of SARs.
The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 14, 2011.
The stock appreciation right becomes exerciseable in three equal installments beginning on the first anniversary date of the transaction date.