TREX CO INC — Director's Dealing 2016

May 17, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TREX CO INC (TREX)
CIK: 0001069878
Period of Report: 2016-05-16

Reporting Person: MERLOTTI FRANK H JR (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-05-16	Common Stock	M	1959	$5.305	Acquired	9924	Direct
2016-05-16	Common Stock	D	250	$41.58	Disposed	9674	Direct
2016-05-17	Common Stock	S	1400	$41.11	Disposed	8274	Direct
2016-05-17	Common Stock	S	309	$41.52	Disposed	7965	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-05-16	Stock Appreciation Right	$5.305	M	1959	Disposed	2018-07-22	Common Stock (1959)	Direct

Footnotes

F1: Stock Appreciation Rights (SARs) are being exercised pursuant to a Rule 10b5-1 Exercise plan adopted by the reporting person on February 24, 2016.

F2: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 Sales plan adopted by the reporting person on February 24, 2016.