Updated Jul 16, 2026 · Last SEC filing 2026-07-06
TREX CO INC (TREX) has filed 3 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-06. 5 Form 8-K material event filings were reported by TREX in the last 90 days. 1 Form 144 notices of proposed sale were filed for TREX stock. InsiderAlpha tracks every TREX SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Lumber & Wood Products (No Furniture) (SIC 2400) |
|---|---|
| SEC CIK | 0001069878 |
| Form 4 filings (90d) | 3 |
|---|---|
| Form 8-K filings (90d) | 5 |
| Form 144 notices (90d) | 1 |
| Latest Form 4 filing | 2026-07-06 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| ROSE B ANDREW | Director | A — Grant or award | 526 | $48.69 | $26K | SEC | |
| Keffer David Christian | Director | A — Grant or award | 131 | $48.69 | $6K | SEC | |
| Rudolph Jacob T. | SVP, CHRO | S — Open-market sale | 1.4K | $50.00 | $70K | SEC | |
| Keffer David Christian | Director | A — Grant or award | 175 | $36.57 | $6K | SEC | |
| ROSE B ANDREW | Director | A — Grant or award | 700 | $36.57 | $26K | SEC | |
| ROSE B ANDREW | Director | P — Open-market purchase | 11.0K | $40.74 | $449K | SEC | |
| ROSE B ANDREW | Director | P — Open-market purchase | 986 | $40.14 | $40K | SEC | |
| ROSE B ANDREW | Director | P — Open-market purchase | 372 | $40.26 | $15K | SEC | |
| Rudolph Jacob T. | SVP, CHRO | A — Grant or award | 1.2K | $41.42 | $52K | SEC | |
| Fernandez Amy M. | SVP, CLO and Secretary | A — Grant or award | 1.9K | $41.42 | $79K | SEC | |
| Rudolph Jacob T. | SVP, CHRO | J — Other acquisition / disposition | 663 | $41.42 | $27K | SEC | |
| Zambanini Adam Dante | EVP, Chief Operating Officer | F — Tax withholding / forfeiture | 8.3K | $41.42 | $343K | SEC | |
| Fernandez Amy M. | SVP, CLO and Secretary | J — Other acquisition / disposition | 1.1K | $41.42 | $45K | SEC | |
| Fernandez Amy M. | SVP, CLO and Secretary | F — Tax withholding / forfeiture | 4.5K | $41.42 | $186K | SEC | |
| FAIRBANKS BRYAN HORIX | President and CEO | F — Tax withholding / forfeiture | 23.1K | $41.42 | $958K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for TREX CO INC (TREX). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Keffer David Christian | 1 | $6K |
| Rudolph Jacob T. | 1 | $70K |
| ROSE B ANDREW | 1 | $26K |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in TREX insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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