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 ($15.9m this quarter). Holder counts are more reliable. Shares outstanding: 101.9m as of 2026-07-16, 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 ≈ $49.28. Options: 11 managers hold calls ($21.6m notional), 10 hold puts ($13.8m).
Trends to Q2 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 |
| Q2 2026 | 470 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| 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 |
| Q2 2026 | 237 | 200 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $9.6m | $10.0m | 1.04 |
| Q4 2025 | $7.5m | $17.2m | 2.28 |
| Q1 2026 | $13.2m | $28.0m | 2.12 |
| Q2 2026 | $21.6m | $13.8m | 0.64 |
Biggest buyers
| MILLENNIUM MANAGEMENT LLC | Added | +3.3m |
| AMERICAN CENTURY COMPANIES INC | Added | +1.6m |
| SG Americas Securities, LLC | Added | +1.6m |
| WELLINGTON MANAGEMENT GROUP LLP | Added | +1.5m |
| CITADEL ADVISORS LLC | Added | +895.5k |
| Quantinno Capital Management LP | Added | +773.8k |
| Alyeska Investment Group, L.P. | New | +599.7k |
| GOLDMAN SACHS GROUP INC | Added | +598.4k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Added | +533.9k |
| Hook Mill Capital Partners, LP | New | +518.6k |
Biggest sellers
| FULLER & THALER ASSET MANAGEMENT, INC. | Sold out | -1.5m |
| Woodline Partners LP | Sold out | -976.0k |
| Nuveen, LLC | Reduced | -723.5k |
| MARSHALL WACE, LLP | Reduced | -715.0k |
| D. E. Shaw & Co., Inc. | Reduced | -714.5k |
| Balyasny Asset Management L.P. | Reduced | -636.7k |
| AQR CAPITAL MANAGEMENT LLC | Reduced | -613.1k |
| Freestone Grove Partners LP | Reduced | -520.3k |
| Squarepoint Ops LLC | Reduced | -471.6k |
| Impax Asset Management Group plc | Reduced | -462.1k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $11.0m220.2k shares |
| JANE STREET GROUP, LLC | Added | $2.7m53.0k shares |
| CITADEL ADVISORS LLC | Added | $2.0m40.8k shares |
| GOLDMAN SACHS GROUP INC | New | $1.8m36.0k shares |
| SIMPLEX TRADING, LLC | Added | $1.4m28.7k shares |
| PEAK6 LLC | New | $860.7k17.2k shares |
| IMC-Chicago, LLC | Reduced | $575.5k11.5k shares |
| GROUP ONE TRADING LLC | Unchanged | $565.5k11.3k shares |
| Point72 Asset Management, L.P. | Reduced | $260.2k5.2k shares |
| Walleye Capital LLC | Reduced | $210.2k4.2k shares |
Biggest puts
| JANE STREET GROUP, LLC | Reduced | $5.4m107.9k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $4.3m85.2k shares |
| CITADEL ADVISORS LLC | Reduced | $1.3m26.6k shares |
| GROUP ONE TRADING LLC | Reduced | $1.1m21.9k shares |
| IMC-Chicago, LLC | Reduced | $815.7k16.3k shares |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | $300.2k60 shares |
| Point72 Asset Management, L.P. | Reduced | $275.2k5.5k shares |
| Walleye Capital LLC | Reduced | $215.2k4.3k shares |
| Walleye Trading LLC | Reduced | $110.1k2.2k shares |
| SIMPLEX TRADING, LLC | Reduced | $25.0k500 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 since 1 Apr 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 |
|---|---|---|---|---|---|
| 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 | — | — |
| Q2 2026 | 0 | — | 1 | $70.0k | $70.0k |
| Q3 2026 | 0 | — | 1 | $52.6k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-08-07 | Fernandez Amy M. SVP, CLO and Secretary | Sold | $52.6k1.1k shares |
| 2026-06-25 | Rudolph Jacob T. SVP, CHRO | Sold plan | $70.0k1.4k 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, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.01% of their portfolio | 10.5m $525.1m | Added +132.1k |
| WELLINGTON MANAGEMENT GROUP LLP 0.09% of their portfolio | 9.9m $494.3m | Added +1.5m |
| ALLIANCEBERNSTEIN L.P. 0.07% of their portfolio | 6.0m $219.9m | Reduced -391.8k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 4.7m $235.2m | Reduced -47.3k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.01% of their portfolio | 4.4m $222.4m | Reduced -39.9k |
| MILLENNIUM MANAGEMENT LLC 0.13% of their portfolio | 3.8m $188.8m | Added +3.3m |
| WASATCH ADVISORS LP 1.23% of their portfolio | 3.8m $188.0m | Added +220.5k |
| AQR CAPITAL MANAGEMENT LLC 0.06% of their portfolio | 3.6m $181.0m | Reduced -613.1k |
| AMERICAN CENTURY COMPANIES INC 0.07% of their portfolio | 3.3m $165.6m | Added +1.6m |
| STATE STREET CORP 0.00% of their portfolio | 3.2m $162.5m | Reduced -2.7k |
| CITADEL ADVISORS LLC 0.06% of their portfolio | 2.2m $111.9m | Added +895.5k |
| Clearbridge Investments, LLC 0.09% of their portfolio | 2.2m $108.5m | Added +47.7k |
| MORGAN STANLEY 0.01% of their portfolio | 2.1m $105.8m | Reduced -26.8k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 1.9m $96.5m | Reduced -47.5k |
| BANK OF AMERICA CORP /DE/ 0.01% of their portfolio | 1.9m $94.9m | Reduced -124.9k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.04% of their portfolio | 1.8m $88.4m | Added +533.9k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 1.7m $85.7m | Added +12.8k |
| SG Americas Securities, LLC 0.05% of their portfolio | 1.7m $84.0m | Added +1.6m |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 1.6m $81.2m | Added +598.4k |
| Point72 Asset Management, L.P. 0.12% of their portfolio | 1.5m $76.1m | Added +153.4k |
| WESTWOOD HOLDINGS GROUP INC 0.57% of their portfolio | 1.5m $75.3m | Reduced -244.6k |
| TWO SIGMA INVESTMENTS, LP 0.05% of their portfolio | 1.3m $66.6m | Reduced -130.7k |
| FEDERATED HERMES, INC. 0.10% of their portfolio | 1.3m $66.5m | Reduced -156.4k |
| Impax Asset Management Group plc 0.42% of their portfolio | 1.3m $65.3m | Reduced -462.1k |
| NORGES BANK 0.01% of their portfolio | 1.3m $63.0m | Not comparable |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 1.1m $56.3m | Added +36.0k |
| Quantinno Capital Management LP 0.06% of their portfolio | 981.5k $49.1m | Added +773.8k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 879.1k $44.0m | Reduced -7.0k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.16% of their portfolio | 875.2k $43.8m | Reduced -394.1k |
| FMR LLC 0.00% of their portfolio | 792.2k $39.6m | Reduced -28.2k |
| ROYCE & ASSOCIATES LP 0.30% of their portfolio | 741.1k $37.1m | Added +215.3k |
| Freestone Grove Partners LP 0.24% of their portfolio | 723.4k $36.2m | Reduced -520.3k |
| Grantham, Mayo, Van Otterloo & Co. LLC 0.08% of their portfolio | 693.1k $34.7m | Added +12.9k |
| VANGUARD FIDUCIARY TRUST CO 0.01% of their portfolio | 656.1k $32.8m | Reduced -9.0k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.02% of their portfolio | 639.4k $32.0m | Reduced -1.4k |
| Amundi 0.01% of their portfolio | 607.7k $30.4m | Reduced -111.4k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 600.8k $30.1m | Reduced -48.7k |
| Alyeska Investment Group, L.P. 0.08% of their portfolio | 599.7k $30.0m | New |
| DISCIPLINED GROWTH INVESTORS INC /MN 0.50% of their portfolio | 592.1k $29.6m | Reduced -86.3k |
| GENEVA CAPITAL MANAGEMENT LLC 0.67% of their portfolio | 588.3k $29.4m | Reduced -161.3k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.01% of their portfolio | 563.9k $28.2m | Reduced -22.0k |
| Hill City Capital, LP 0.64% of their portfolio | 550.0k $27.5m | Unchanged |
| SEI INVESTMENTS CO 0.02% of their portfolio | 542.4k $27.1m | Reduced -5.2k |
| MARSHALL WACE, LLP 0.02% of their portfolio | 520.1k $26.0m | Reduced -715.0k |
| Hook Mill Capital Partners, LP 2.41% of their portfolio | 518.6k $25.9m | New |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.08% of their portfolio | 511.5k $25.6m | Reduced -135.7k |
| DAVENPORT & Co LLC 0.12% of their portfolio | 467.3k $23.2m | Reduced -40.1k |
| Heron Bay Capital Management 2.09% of their portfolio | 460.2k $23.0m | Reduced -5.6k |
| PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio | 403.8k $20.2m | Added +164.4k |
| Rivermont Capital Management LP 2.86% of their portfolio | 403.3k $20.2m | New |
| Junto Capital Management LP 0.37% of their portfolio | 401.2k $20.1m | New |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 0.03% of their portfolio | 398.4k $19.9m | Added +264.6k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 367.9k $18.5m | Added +172.0k |
| MUFG Securities EMEA plc 0.19% of their portfolio | 366.2k $18.3m | New |
| CONFLUENCE INVESTMENT MANAGEMENT LLC 0.28% of their portfolio | 354.3k $17.7m | Reduced -36.3k |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 336.4k $16.8m | Added +5.5k |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.02% of their portfolio | 333.0k $16.7m | New |
| BANK OF NOVA SCOTIA 0.02% of their portfolio | 319.7k $16.0m | Reduced -107.7k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 313.2k $15.7m | Reduced -434.3k |
| Invesco Ltd. 0.00% of their portfolio | 302.3k $15.1m | Added +23.6k |
| UBS Group AG 0.00% of their portfolio | 297.0k $14.9m | Reduced -81.0k |
| Walleye Capital LLC 0.07% of their portfolio | 294.2k $14.7m | Added +38.5k |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 285.4k $14.3m | Reduced -9.2k |
| LOOMIS SAYLES & CO L P 0.02% of their portfolio | 281.3k $14.1m | Reduced -11.6k |
| FIRST TRUST ADVISORS LP 0.01% of their portfolio | 277.1k $13.9m | Added +95.1k |
| Creative Planning 0.01% of their portfolio | 268.1k $13.4m | Added +50.9k |
| BOOTHBAY FUND MANAGEMENT, LLC 0.23% of their portfolio | 247.5k $12.4m | Added +235.1k |
| Man Group plc 0.02% of their portfolio | 222.6k $11.1m | Reduced -66.8k |
| Nuveen, LLC 0.00% of their portfolio | 215.9k $10.8m | Reduced -723.5k |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 212.2k $10.6m | Reduced -102.2k |
| Swiss National Bank 0.01% of their portfolio | 208.5k $10.4m | Reduced -3.8k |
| AGF MANAGEMENT LTD 0.04% of their portfolio | 200.7k $10.0m | Added +79.7k |
| OSBORNE PARTNERS CAPITAL MANAGEMENT, LLC 0.55% of their portfolio | 199.2k $10.0m | Reduced -8.9k |
| Mariner, LLC 0.01% of their portfolio | 196.6k $9.8m | Added +12.8k |
| WINTON GROUP Ltd 0.32% of their portfolio | 194.5k $9.7m | Added +159.0k |
| GAMCO INVESTORS, INC. ET AL 0.09% of their portfolio | 191.4k $9.6m | Added +45.4k |
| D. E. Shaw & Co., Inc. 0.01% of their portfolio | 178.2k $8.9m | Reduced -714.5k |
| Gotham Asset Management, LLC 0.02% of their portfolio | 157.8k $7.9m | Reduced -12.8k |
| H Squared Management LP 4.97% of their portfolio | 155.2k $7.8m | Added +31.0k |
| California Public Employees Retirement System 0.00% of their portfolio | 152.3k $7.6m | Added +486 |
| Allspring Global Investments Holdings, LLC 0.01% of their portfolio | 152.3k $7.4m | Added +61.7k |
| Cerity Partners LLC 0.01% of their portfolio | 146.9k $7.3m | Added +27.6k |
| Voleon Capital Management LP 0.13% of their portfolio | 146.7k $7.3m | Reduced -96.5k |
| CITIGROUP INC 0.00% of their portfolio | 145.6k $7.3m | Reduced -197.6k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 145.5k $7.3m | Added +641 |
| EFG International AG 0.13% of their portfolio | 143.8k $7.2m | Added +8.8k |
| Jain Global LLC 0.08% of their portfolio | 142.0k $7.1m | New |
| Balyasny Asset Management L.P. 0.01% of their portfolio | 139.6k $7.0m | Reduced -636.7k |
| Concentric Capital Strategies, LP 0.43% of their portfolio | 138.1k $6.9m | New |
| KORNITZER CAPITAL MANAGEMENT INC /KS 0.14% of their portfolio | 137.2k $6.9m | Added +24.3k |
| Legal & General Group Plc 0.00% of their portfolio | 135.0k $6.8m | Reduced -5.3k |
| BARCLAYS PLC 0.00% of their portfolio | 134.6k $6.7m | Reduced -13.3k |
| GABELLI FUNDS LLC 0.04% of their portfolio | 127.9k $6.4m | Added +41.1k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 127.7k $6.4m | Added +2.4k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 119.7k $6.0m | Reduced -9.6k |
| Ensign Peak Advisors, Inc 0.01% of their portfolio | 116.4k $5.8m | Reduced -17.3k |
| MAIRS & POWER INC 0.05% of their portfolio | 116.0k $5.8m | Unchanged |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 108.6k $5.4m | Added +4.7k |
| LPL Financial LLC 0.00% of their portfolio | 108.0k $5.4m | Reduced -18.6k |
| Tabor Asset Management, LP 1.65% of their portfolio | 107.9k $5.4m | New |