SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
GRATZ JAY M

(Last) (First) (Middle)
C/O TREX COMPANY, INC.
160 EXETER DRIVE

(Street)
WINCHESTER VA 22603-8605

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
TREX CO INC [ TREX ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
08/11/2014
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 08/11/2014 M (1) 1,860 A $12.645 8,616 D
Common Stock 08/11/2014 M (1) 432 A $10.815 9,048 D
Common Stock 08/11/2014 M (1) 1,044 A $10.01 10,092 D
Common Stock 08/11/2014 M (1) 2,568 A $9.025 12,660 D
Common Stock 08/11/2014 M (1) 1,246 A $8.47 13,906 D
Common Stock 08/11/2014 D 1,995 D $36.31 11,911 D
Common Stock 08/12/2014 S (2) 5,155 D $36 6,756 D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Appreciation Right $12.645 08/11/2014 M (1) 1,860 02/22/2007 02/22/2017 Common Stock 1,860 $0 0 D
Stock Appreciation Right $10.815 08/11/2014 M (1) 432 04/02/2007 04/02/2017 Common Stock 432 $0 0 D
Stock Appreciation Right $10.01 08/11/2014 M (1) 1,044 07/02/2007 07/02/2017 Common Stock 1,044 $0 0 D
Stock Appreciation Right $9.025 08/11/2014 M (1) 2,568 07/18/2007 07/18/2017 Common Stock 2,568 $0 0 D
Stock Appreciation Right $8.47 08/11/2014 M (1) 1,246 10/01/2008 10/01/2018 Common Stock 1,246 $0 0 D
Explanation of Responses:
1. Stock Appreciation Rights (SARs) are being exercised pursuant to a Rule 10b5-1 Exercise plan adopted by the reporting person on February 25, 2014.
2. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 Sales plan adopted by the reporting person on February 25, 2014.
/s/ William R. Gupp by power of attorney 08/12/2014
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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