Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
404 institutional managers reported holding TREX for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 50%. 56 opened new positions; 78 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 10.36M | 9.86% | $377.7M | trimmed -0.6% | ≤2013 |
| Vanguard Group | 10.08M | 9.59% | $367.5M | added +2.5% | ≤2013 |
| Wellington Management | 8.36M | 7.95% | $304.7M | added +15.7% | 2025 Q1 |
| AllianceBernstein | 6.43M | 6.12% | $234.4M | trimmed -1.1% | ≤2013 |
| AQR Capital | 4.25M | 4.04% | $154.8M | added +9% | 2016 Q3 |
| Wasatch Advisors LP | 3.54M | 3.36% | $128.9M | trimmed -1.8% | ≤2013 |
| State Street | 3.25M | 3.09% | $118.5M | added +2.8% | ≤2013 |
| Morgan Stanley | 2.14M | 2.04% | $78.0M | trimmed -7.5% | ≤2013 |
| Clearbridge Investments, LLC | 2.12M | 2.02% | $77.3M | trimmed -2.4% | 2013 Q4 |
| Bank OF America CORP /DE/ | 2.02M | 1.92% | $73.6M | added +30.8% | ≤2013 |
| Geode Capital | 1.98M | 1.88% | $72.0M | added +3.3% | ≤2013 |
| Impax Asset Management Group plc | 1.77M | 1.68% | $64.4M | trimmed -1% | 2023 Q1 |
| Westwood Holdings Group INC | 1.75M | 1.66% | $63.7M | opened | 2026 Q1 |
| Dimensional Fund Advisors | 1.70M | 1.62% | $62.0M | trimmed -4.8% | ≤2013 |
| American Century Companies INC | 1.68M | 1.59% | $61.1M | added +22.2% | 2018 Q3 |
| Federated Hermes, INC. | 1.48M | 1.41% | $54.1M | trimmed -1.5% | 2016 Q4 |
| Fuller & Thaler Asset Management, INC. | 1.47M | 1.40% | $53.8M | opened | 2026 Q1 |
| Two Sigma | 1.46M | 1.39% | $53.3M | added +49.7% | 2025 Q2 |
| Point72 | 1.37M | 1.30% | $49.8M | trimmed -17.7% | 2022 Q3 |
| Citadel Advisors | 1.34M | 1.28% | $48.9M | trimmed -29.5% | 2017 Q2 |
| Jacobs Levy Equity Management, INC | 1.27M | 1.21% | $46.3M | trimmed -4.3% | 2022 Q3 |
| Freestone Grove Partners LP | 1.24M | 1.18% | $45.3M | trimmed -19.1% | 2025 Q4 |
| Marshall Wace | 1.24M | 1.18% | $45.0M | added +793.3% | 2025 Q1 |
| Arrowstreet Capital | 1.23M | 1.17% | $44.9M | added +566.9% | 2023 Q4 |
| Charles Schwab Investment Management | 1.09M | 1.03% | $39.7M | added +11.2% | ≤2013 |
| Goldman Sachs | 1.02M | 0.97% | $37.3M | added +65% | ≤2013 |
| Woodline Partners LP | 976.0k | 0.93% | $35.6M | added +57.3% | 2023 Q2 |
| UBS | 964.0k | 0.92% | $35.1M | added +38.9% | ≤2013 |
| Nuveen | 939.5k | 0.89% | $34.2M | added +25.5% | 2019 Q1 |
| D. E. Shaw | 892.7k | 0.85% | $32.5M | trimmed -49.4% | 2020 Q2 |
| Northern Trust | 886.1k | 0.84% | $32.3M | added +4.2% | ≤2013 |
| FMR (Fidelity) | 820.4k | 0.78% | $29.9M | trimmed -36.2% | 2016 Q3 |
| Balyasny Asset Management | 776.3k | 0.74% | $28.3M | added +262.1% | 2022 Q2 |
| Geneva Capital Management LLC | 749.7k | 0.71% | $27.3M | trimmed -6.4% | 2020 Q1 |
| Deutsche Bank AG\ | 747.6k | 0.71% | $27.2M | unchanged | ≤2013 |
| Amundi | 719.2k | 0.68% | $26.2M | added +109.9% | 2018 Q4 |
| Grantham, Mayo, Van Otterloo & CO. LLC | 680.2k | 0.65% | $24.8M | added +22.2% | 2025 Q1 |
| Disciplined Growth Investors INC /MN | 678.4k | 0.65% | $24.7M | trimmed -32.7% | ≤2013 |
| BNY Mellon | 649.5k | 0.62% | $23.7M | added +0.8% | ≤2013 |
| William Blair Investment Management, LLC | 647.2k | 0.62% | $23.6M | opened | 2026 Q1 |
| Manufacturers Life Insurance Company, THE | 640.8k | 0.61% | $23.4M | trimmed -17.4% | ≤2013 |
| Hill City Capital, LP (focused) | 550.0k | 0.52% | $20.0M | unchanged | 2025 Q4 |
| SEI Investments CO | 547.5k | 0.52% | $20.0M | added +193.8% | 2017 Q2 |
| Royce & Associates | 525.9k | 0.50% | $19.2M | added +248.4% | 2025 Q4 |
| Squarepoint Ops LLC | 510.6k | 0.49% | $18.6M | trimmed -32.8% | 2025 Q3 |
| Davenport & CO LLC | 507.4k | 0.48% | $18.5M | trimmed -10.7% | 2019 Q2 |
| Millennium Management | 497.1k | 0.47% | $18.1M | trimmed -58.8% | 2016 Q3 |
| Heron Bay Capital Management | 465.9k | 0.44% | $17.0M | added +777.4% | 2025 Q4 |
| Bank OF Nova Scotia | 427.4k | 0.41% | $15.6M | added +46.7% | 2025 Q4 |
| Confluence Investment Management LLC | 390.6k | 0.37% | $14.2M | opened | 2026 Q1 |
Largest 50 of 404 shown; the full ranked, searchable register is at boothcheck.com/holders/TREX. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.