| SC 13G | 2015-02-17 | Clearbridge Investments, LLC | TREX CO INC | 1,696,697 | 5.3% | EDGAR |
| SC 13G | 2015-02-13 | LORD, ABBETT & CO. LLC | TREX CO INC | 1,852,692 | 5.8% | EDGAR |
| SC 13G/A | 2015-02-11 | STATE STREET CORP | TREX CO INC | - | 1.7% | EDGAR |
| SC 13G/A | 2015-02-10 | VANGUARD GROUP INC | TREX CO INC | 1,862,417 | 5.8% | EDGAR |
| SC 13G | 2015-02-10 | BARROW HANLEY MEWHINNEY & STRAUSS LLC | TREX CO INC | 2,111,915 | 6.6% | EDGAR |
| SC 13G | 2015-02-02 | JPMORGAN CHASE & CO | TREX CO INC | - | - | EDGAR |
| SC 13G/A | 2015-01-29 | Invesco Ltd. | TREX CO INC | 1,311,434 | 4.1% | EDGAR |
| SC 13G/A | 2015-01-29 | BlackRock Inc. | TREX CO INC | 2,213,843 | 6.9% | EDGAR |
| SC 13G/A | 2014-11-10 | Division of Investment, Department of the Treasury, State of New Jersey | TREX CO INC | 1,575,000 | 4.9% | EDGAR |
| SC 13G | 2014-07-01 | Division of Investment, Department of the Treasury, State of New Jersey | TREX CO INC | 1,733,000 | 5.2% | EDGAR |
| SC 13G | 2014-02-12 | BARROW HANLEY MEWHINNEY & STRAUSS LLC | TREX CO INC | 1,200,777 | 7.2% | EDGAR |
| SC 13G | 2014-02-12 | VANGUARD GROUP INC | TREX CO INC | 1,001,113 | 6.0% | EDGAR |
| SC 13G/A | 2014-02-11 | Invesco Ltd. | TREX CO INC | 1,070,635 | 6.4% | EDGAR |
| SC 13G | 2014-02-04 | STATE STREET CORP | TREX CO INC | - | 5.5% | EDGAR |
| SC 13G/A | 2014-01-30 | BlackRock Inc. | TREX CO INC | 955,041 | 5.7% | EDGAR |
| SC 13G/A | 2014-01-28 | JPMORGAN CHASE & CO | TREX CO INC | - | - | EDGAR |
| SC 13G/A | 2013-02-15 | Knobloch Carl W Jr | TREX CO INC | 431,600 | 2.6% | EDGAR |
| SC 13G/A | 2013-02-14 | ROYCE & ASSOCIATES LLC | TREX CO INC | 453,915 | 2.7% | EDGAR |
| SC 13G | 2013-02-13 | Invesco Ltd. | TREX CO INC | 876,787 | 5.2% | EDGAR |
| SC 13G | 2013-02-12 | WESTWOOD MANAGEMENT CORP /TX | TREX CO INC | 1,062,381 | 6.3% | EDGAR |