| Accession Number: | 0001127602-21-007872 |
| Date: | 2021-02-23 |
| Issuer: | TREX CO INC (TREX) |
| Original Submission Date: |
GUPP WILLIAM R.
C/O TREX COMPANY, INC.
160 EXETER DRIVE
WINCHESTER, VA 22603-8605
| Title of Security | Transaction Date | 2a. Deemed Execution Date | Transaction Code | Shares | Acquired or Disposed | Price per share | 5. Amount of Securities Beneficially Owned Following Reported Transaction | 6. Ownership Form Direct or Indirect | Nature of Indirect Ownership |
|---|---|---|---|---|---|---|---|---|---|
| COMMON STOCK | 2021-02-23 | M | 14,000 | a | $91.16 | 14,000 | direct | ||
| COMMON STOCK | 2021-02-23 | D | 842 | d | $91.16 | 116,613 | direct | ||
| COMMON STOCK | 2021-02-23 | F | 5,935 | d | $91.16 | 110,678 | direct | ||
| COMMON STOCK | 2021-02-24 | S | 7,223 | d | $92.85 | 103,455 | direct |
| Title of Derivative Security | Conversion or Exercise Price of Derivative Security | Transaction Date | Deemed Execution Date | Transaction Code | Number of Derivative Securities Acquired (A) or Disposed of (D) | Date Exercisable | Expiration Date | Title and Amount of Securities Underlying Derivative Security | Price of Derivative Security | Number of derivative Securities Beneficially Owned Following Reported Transaction(s) | Ownership Form: Direct (D) or Indirect (I) | Nature of Indirect Beneficial Ownership |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| STOCK APPRECIATION RIGHT | 5.48 | 2021-02-23 | deemed execution date | M | 14,000 (d) | 2014-02-12 | 2023-02-12 | common stock 14,000 | $5.48 | 14,000 | direct |
| ID | footnote |
|---|---|
| f1 | stock appreciation rights (sars) are being exercised pursuant to a rule 10b5-1 trading plan adopted by the reporting person on august 5, 2020. |
| f2 | 5,935 shares are being surrendered as allowed by the company's 2014 stock incentive plan to cover payment of taxes currently due on previously granted restricted shares. |
| f3 | the sales reported in this form 4 were effected pursuant to a rule 10b5-1 sales plan adopted by the reporting person on august 5, 2020. |
| f4 | the price reported in column 4 is a weighted average price. these shares were sold in multiple transactions at prices ranging from $92.53 to $93.02, inclusive. |
