TREX CO INC — Director's Dealing 2014

May 13, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2014-05-09

Reporting Person: KAPLAN RONALD W (Director, President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-05-09	Common Stock	S	11718	$33.035	Disposed	164570	Direct

Footnotes

F1: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 25, 2014.

F2: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.00 to $33.09, inclusive. The reporting person undertakes to provide Trex Company, Inc., any security holder of Trex Company, Inc., 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 ranges set forth in Footnote (2) to this Form 4.

F3: On May 7, 2014, the Common Stock of the Trex Company, Inc. split two-for-one, resulting in the reporting person's ownership of additional shares of Common Stock. All future Form 4 filings made by the reporting person will include adjustments, as necessary, to reflect the stock split.