TREX CO INC TREX
COM · Common Stock · CUSIP 89531P105 · ISIN US89531P1057
American building materials company
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($13.9m this quarter). Holder counts are more reliable. Shares outstanding: 103.9m as of 2026-04-16, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $36.32. Options: 9 managers hold calls ($13.2m notional), 13 hold puts ($28.0m).
Trends to Q1 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 447 |
| Q4 2022 | 456 |
| Q1 2023 | 430 |
| Q2 2023 | 458 |
| Q3 2023 | 483 |
| Q4 2023 | 484 |
| Q1 2024 | 529 |
| Q2 2024 | 522 |
| Q3 2024 | 495 |
| Q4 2024 | 466 |
| Q1 2025 | 444 |
| Q2 2025 | 447 |
| Q3 2025 | 468 |
| Q4 2025 | 435 |
| Q1 2026 | 426 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q2 2024 | 247 | 256 |
| Q3 2024 | 225 | 265 |
| Q4 2024 | 193 | 264 |
| Q1 2025 | 211 | 237 |
| Q2 2025 | 221 | 220 |
| Q3 2025 | 230 | 215 |
| Q4 2025 | 221 | 290 |
| Q1 2026 | 215 | 198 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2025 | $16.1m | $27.9m | 1.74 |
| Q3 2025 | $9.6m | $10.0m | 1.04 |
| Q4 2025 | $7.5m | $17.2m | 2.28 |
| Q1 2026 | $13.2m | $28.0m | 2.12 |
Biggest buyers
| WESTWOOD HOLDINGS GROUP INC | New | +1.7m |
| FULLER & THALER ASSET MANAGEMENT, INC. | New | +1.5m |
| WELLINGTON MANAGEMENT GROUP LLP | Added | +1.1m |
| MARSHALL WACE, LLP | Added | +1.1m |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Added | +1.0m |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | New | +647.2k |
| Balyasny Asset Management L.P. | Added | +561.9k |
| TWO SIGMA INVESTMENTS, LP | Added | +485.8k |
| BANK OF AMERICA CORP /DE/ | Added | +475.9k |
| Heron Bay Capital Management | Added | +412.8k |
Biggest sellers
| D. E. Shaw & Co., Inc. | Reduced | -872.4k |
| PRINCIPAL FINANCIAL GROUP INC | Reduced | -858.8k |
| MILLENNIUM MANAGEMENT LLC | Reduced | -710.5k |
| JANE STREET GROUP, LLC | Reduced | -587.5k |
| TWO SIGMA ADVISERS, LP | Sold out | -574.5k |
| CITADEL ADVISORS LLC | Reduced | -560.2k |
| Long Pond Capital, LP | Sold out | -484.3k |
| FMR LLC | Reduced | -464.5k |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | -409.4k |
| TORONTO DOMINION BANK | Sold out | -400.3k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $8.4m229.3k shares |
| CITADEL ADVISORS LLC | Added | $1.3m35.9k shares |
| IMC-Chicago, LLC | Added | $1.1m31.5k shares |
| JANE STREET GROUP, LLC | Reduced | $542.7k14.9k shares |
| SIMPLEX TRADING, LLC | Added | $517.2k14.2k shares |
| Point72 Asset Management, L.P. | Unchanged | $517.2k14.2k shares |
| GROUP ONE TRADING LLC | Added | $411.5k11.3k shares |
| Walleye Capital LLC | Reduced | $233.1k6.4k shares |
| Walleye Trading LLC | Added | $214.9k5.9k shares |
Biggest puts
| JANE STREET GROUP, LLC | Added | $7.1m196.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $5.8m159.7k shares |
| BNP PARIBAS FINANCIAL MARKETS | New | $3.7m1.0k shares |
| CITADEL ADVISORS LLC | Reduced | $2.9m80.5k shares |
| GOLDMAN SACHS GROUP INC | New | $2.9m80.0k shares |
| SIMPLEX TRADING, LLC | Added | $1.3m36.5k shares |
| TUDOR INVESTMENT CORP ET AL | Reduced | $1.0m27.6k shares |
| GROUP ONE TRADING LLC | Added | $859.5k23.6k shares |
| IMC-Chicago, LLC | Added | $815.8k22.4k shares |
| Walleye Trading LLC | Added | $681.1k18.7k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution filed 2025-04-24 | 9.8% |
| WELLINGTON MANAGEMENT GROUP LLP 13G · institution -0.9 pts · filed 2026-08-13 | 9.5% |
| MILLENNIUM MANAGEMENT LLC 13G · passive investor new · filed 2026-08-07 | 5.5% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-30 | 5.4% |
Fell to 5% or below in the last year: ALLIANCEBERNSTEIN L.P. (0.2%, 2026-09-04), VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD CAPITAL MANAGEMENT LLC), PRICE T ROWE ASSOCIATES INC /MD/ (0.7%, 2025-11-14)
Insider purchases and sales in Q1 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q2 2024 | 1 | $2.5k | 1 | $1.5m | — |
| Q3 2024 | 1 | $2.8k | 0 | — | — |
| Q4 2024 | 1 | $2.4k | 1 | $107.1k | — |
| Q1 2025 | 1 | $2.8k | 1 | $87.9k | — |
| Q2 2025 | 1 | $2.6k | 2 | $235.1k | — |
| Q3 2025 | 1 | $3.1k | 1 | $98.7k | — |
| Q4 2025 | 2 | $481.4k | 0 | — | — |
| Q1 2026 | 1 | $503.6k | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-03-03 | ROSE B ANDREW Director | Bought | $488.6k12.0k shares |
| 2026-03-02 | ROSE B ANDREW Director | Bought | $15.0k372 shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q1 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.01% of their portfolio | 10.4m $377.4m | Reduced -64.8k |
| WELLINGTON MANAGEMENT GROUP LLP 0.06% of their portfolio | 8.4m $304.4m | Added +1.1m |
| ALLIANCEBERNSTEIN L.P. 0.07% of their portfolio | 6.4m $225.6m | Reduced -72.5k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 4.7m $172.9m | First filing |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.01% of their portfolio | 4.5m $163.3m | First filing |
| AQR CAPITAL MANAGEMENT LLC 0.07% of their portfolio | 4.2m $152.7m | Added +350.9k |
| WASATCH ADVISORS LP 0.86% of their portfolio | 3.5m $128.8m | Reduced -64.7k |
| STATE STREET CORP 0.00% of their portfolio | 3.3m $118.4m | Added +87.5k |
| MORGAN STANLEY 0.00% of their portfolio | 2.1m $77.9m | Reduced -173.0k |
| Clearbridge Investments, LLC 0.07% of their portfolio | 2.1m $77.3m | Reduced -51.6k |
| BANK OF AMERICA CORP /DE/ 0.01% of their portfolio | 2.0m $73.6m | Added +475.9k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 2.0m $72.0m | Added +62.4k |
| Impax Asset Management Group plc 0.45% of their portfolio | 1.8m $64.3m | Reduced -17.4k |
| WESTWOOD HOLDINGS GROUP INC 0.46% of their portfolio | 1.7m $63.7m | New |
| DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio | 1.7m $61.9m | Reduced -86.2k |
| AMERICAN CENTURY COMPANIES INC 0.03% of their portfolio | 1.7m $61.0m | Added +303.9k |
| FEDERATED HERMES, INC. 0.09% of their portfolio | 1.5m $54.1m | Reduced -22.8k |
| FULLER & THALER ASSET MANAGEMENT, INC. 0.18% of their portfolio | 1.5m $53.7m | New |
| TWO SIGMA INVESTMENTS, LP 0.04% of their portfolio | 1.5m $53.3m | Added +485.8k |
| Point72 Asset Management, L.P. 0.09% of their portfolio | 1.4m $49.8m | Reduced -294.9k |
| CITADEL ADVISORS LLC 0.03% of their portfolio | 1.3m $48.8m | Reduced -560.2k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.19% of their portfolio | 1.3m $46.2m | Reduced -57.0k |
| Freestone Grove Partners LP 0.33% of their portfolio | 1.2m $45.3m | Reduced -294.3k |
| MARSHALL WACE, LLP 0.05% of their portfolio | 1.2m $45.0m | Added +1.1m |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.02% of their portfolio | 1.2m $44.9m | Added +1.0m |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 1.1m $39.6m | Added +109.2k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 1.0m $37.3m | Added +403.4k |
| Woodline Partners LP 0.13% of their portfolio | 976.0k $35.5m | Added +355.5k |
| Nuveen, LLC 0.01% of their portfolio | 939.5k $34.2m | Added +191.0k |
| D. E. Shaw & Co., Inc. 0.03% of their portfolio | 892.7k $32.5m | Reduced -872.4k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 886.1k $32.3m | Added +35.5k |
| FMR LLC 0.00% of their portfolio | 820.4k $29.9m | Reduced -464.5k |
| Balyasny Asset Management L.P. 0.06% of their portfolio | 776.3k $28.3m | Added +561.9k |
| GENEVA CAPITAL MANAGEMENT LLC 0.58% of their portfolio | 749.7k $27.3m | Reduced -51.2k |
| DEUTSCHE BANK AG\ 0.01% of their portfolio | 747.6k $27.2m | Added +415 |
| Amundi 0.01% of their portfolio | 719.2k $26.2m | Added +376.6k |
| Grantham, Mayo, Van Otterloo & Co. LLC 0.06% of their portfolio | 680.2k $24.8m | Added +123.6k |
| DISCIPLINED GROWTH INVESTORS INC /MN 0.51% of their portfolio | 678.4k $24.7m | Reduced -328.9k |
| VANGUARD FIDUCIARY TRUST CO 0.01% of their portfolio | 665.2k $24.2m | First filing |
| Bank of New York Mellon Corp 0.00% of their portfolio | 649.5k $23.7m | Added +5.2k |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.08% of their portfolio | 647.2k $23.6m | New |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.02% of their portfolio | 640.8k $23.3m | Reduced -134.6k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 585.9k $21.3m | Reduced -13.2k |
| Hill City Capital, LP 0.72% of their portfolio | 550.0k $20.0m | Reduced -2.0k |
| SEI INVESTMENTS CO 0.02% of their portfolio | 547.5k $19.9m | Added +361.2k |
| ROYCE & ASSOCIATES LP 0.19% of their portfolio | 525.9k $19.2m | Added +374.9k |
| Squarepoint Ops LLC 0.04% of their portfolio | 510.6k $18.6m | Reduced -248.6k |
| DAVENPORT & Co LLC 0.10% of their portfolio | 507.4k $18.5m | Reduced -60.5k |
| MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio | 497.1k $18.1m | Reduced -710.5k |
| Heron Bay Capital Management 1.56% of their portfolio | 465.9k $17.0m | Added +412.8k |
| BANK OF NOVA SCOTIA 0.03% of their portfolio | 427.4k $15.6m | Added +136.0k |
| CONFLUENCE INVESTMENT MANAGEMENT LLC 0.22% of their portfolio | 390.6k $14.2m | New |
| UBS Group AG 0.00% of their portfolio | 378.1k $13.8m | Added +282.9k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 360.1k $13.1m | Added +307.7k |
| CITIGROUP INC 0.01% of their portfolio | 343.2k $12.5m | Reduced -112.6k |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 330.9k $12.1m | Added +284.9k |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 314.4k $11.4m | Added +14.1k |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 294.6k $10.7m | Added +3.7k |
| LOOMIS SAYLES & CO L P 0.01% of their portfolio | 292.8k $10.7m | New |
| Man Group plc 0.02% of their portfolio | 289.4k $10.5m | Added +131.5k |
| Invesco Ltd. 0.00% of their portfolio | 278.7k $10.1m | Reduced -8.6k |
| JANE STREET GROUP, LLC 0.01% of their portfolio | 270.4k $9.8m | Reduced -587.5k |
| Walleye Capital LLC 0.06% of their portfolio | 255.7k $9.3m | New |
| Voleon Capital Management LP 0.19% of their portfolio | 243.2k $8.9m | Added +30.9k |
| PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio | 239.4k $8.7m | Reduced -858.8k |
| Creative Planning 0.01% of their portfolio | 217.2k $7.9m | Added +109.7k |
| Swiss National Bank 0.00% of their portfolio | 212.3k $7.7m | Added +800 |
| OSBORNE PARTNERS CAPITAL MANAGEMENT, LLC 0.40% of their portfolio | 208.1k $7.6m | Added +58.3k |
| Quantinno Capital Management LP 0.01% of their portfolio | 207.7k $7.6m | Added +36.0k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 195.9k $6.9m | Reduced -58.7k |
| Mariner, LLC 0.01% of their portfolio | 183.8k $6.7m | Added +60.9k |
| FIRST TRUST ADVISORS LP 0.00% of their portfolio | 182.0k $6.6m | Added +104.9k |
| Gotham Asset Management, LLC 0.02% of their portfolio | 170.6k $6.2m | Added +53.0k |
| OSSIAM 0.11% of their portfolio | 169.4k $6.2m | Unchanged |
| RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio | 169.3k $6.2m | Reduced -108.2k |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 155.5k $5.6m | Added +17.8k |
| California Public Employees Retirement System 0.00% of their portfolio | 151.8k $5.5m | Reduced -46.7k |
| Lansforsakringar Fondforvaltning AB (publ) 0.03% of their portfolio | 148.5k $5.4m | Reduced -171.0k |
| BARCLAYS PLC 0.00% of their portfolio | 147.9k $5.4m | Reduced -18.4k |
| GAMCO INVESTORS, INC. ET AL 0.05% of their portfolio | 146.0k $5.3m | Added +1.5k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 144.8k $5.3m | Added +53.9k |
| CWM, LLC 0.01% of their portfolio | 140.8k $5.1m | Added +54.8k |
| Legal & General Group Plc 0.00% of their portfolio | 140.3k $5.1m | Reduced -13.3k |
| EFG International AG 0.11% of their portfolio | 135.0k $4.9m | Reduced -1.4k |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 0.01% of their portfolio | 133.8k $4.9m | New |
| Ensign Peak Advisors, Inc 0.01% of their portfolio | 133.7k $4.9m | Added +71.7k |
| Retirement Systems of Alabama 0.02% of their portfolio | 131.5k $4.8m | Added +2.8k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 129.3k $4.7m | Added +27.2k |
| LPL Financial LLC 0.00% of their portfolio | 126.6k $4.6m | Reduced -15.6k |
| Trexquant Investment LP 0.03% of their portfolio | 126.4k $4.6m | Added +90.6k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 125.3k $4.6m | Added +29.9k |
| H Squared Management LP 4.17% of their portfolio | 124.2k $4.5m | New |
| Alpine Peaks Capital, LP 4.51% of their portfolio | 122.3k $4.5m | Reduced -500 |
| SG Americas Securities, LLC 0.00% of their portfolio | 121.8k $4.4m | Added +18.2k |
| AGF MANAGEMENT LTD 0.02% of their portfolio | 121.0k $4.4m | New |
| CAPITAL FUND MANAGEMENT S.A. 0.04% of their portfolio | 121.0k $4.4m | Reduced -88.9k |
| HRT FINANCIAL LP 0.02% of their portfolio | 120.5k $4.4m | Reduced -89.5k |
| Cerity Partners LLC 0.01% of their portfolio | 119.3k $4.3m | Added +17.1k |
| MAIRS & POWER INC 0.04% of their portfolio | 116.0k $4.2m | Added +25.4k |
| KORNITZER CAPITAL MANAGEMENT INC /KS 0.09% of their portfolio | 112.9k $4.1m | Reduced -300 |