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 ($5.5m this quarter). Holder counts are more reliable. Shares outstanding: 107.2m as of 2025-04-24, 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 ≈ $58.09. Options: 13 managers hold calls ($9.7m notional), 12 hold puts ($7.8m).
Trends to Q1 2025
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 |
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 2023 | 232 | 198 |
| Q3 2023 | 244 | 220 |
| Q4 2023 | 223 | 233 |
| Q1 2024 | 236 | 244 |
| Q2 2024 | 247 | 256 |
| Q3 2024 | 225 | 265 |
| Q4 2024 | 193 | 264 |
| Q1 2025 | 211 | 237 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2024 | $36.4m | $43.5m | 1.20 |
| Q3 2024 | $28.9m | $11.7m | 0.40 |
| Q4 2024 | $10.6m | $11.9m | 1.12 |
| Q1 2025 | $9.7m | $7.8m | 0.81 |
Biggest buyers
| PRICE T ROWE ASSOCIATES INC /MD/ | Added | +4.2m |
| Madison Asset Management, LLC | New | +1.9m |
| WASATCH ADVISORS LP | Added | +989.9k |
| AMERICAN CENTURY COMPANIES INC | Added | +784.8k |
| Thrivent Financial for Lutherans | Added | +767.1k |
| DISCIPLINED GROWTH INVESTORS INC /MN | Added | +715.1k |
| NEUBERGER BERMAN GROUP LLC | Added | +710.5k |
| CITADEL ADVISORS LLC | Added | +692.9k |
| WELLINGTON MANAGEMENT GROUP LLP | New | +682.4k |
| NATIXIS ADVISORS, LLC | Added | +656.8k |
Biggest sellers
| ALLIANCEBERNSTEIN L.P. | Reduced | -2.8m |
| Point72 Asset Management, L.P. | Reduced | -1.0m |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Reduced | -636.8k |
| Allianz Asset Management GmbH | Reduced | -564.9k |
| BAMCO INC /NY/ | Reduced | -542.9k |
| TD Asset Management Inc | Reduced | -381.5k |
| AustralianSuper Pty Ltd | Reduced | -360.2k |
| MILLENNIUM MANAGEMENT LLC | Reduced | -335.7k |
| FEDERATED HERMES, INC. | Reduced | -334.1k |
| Cerity Partners LLC | Reduced | -232.9k |
Biggest calls
| CITADEL ADVISORS LLC | Added | $2.5m43.6k shares |
| JANE STREET GROUP, LLC | Added | $2.2m37.4k shares |
| Twin Tree Management, LP | Unchanged | $1.1m18.1k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $865.7k14.9k shares |
| MILLENNIUM MANAGEMENT LLC | New | $639.1k11.0k shares |
| WOLVERINE TRADING, LLC | Added | $590.3k10.3k shares |
| Walleye Capital LLC | Reduced | $522.9k9.0k shares |
| Cubist Systematic Strategies, LLC | Reduced | $476.4k8.2k shares |
| Walleye Trading LLC | Reduced | $389.3k6.7k shares |
| DUDLEY CAPITAL MANAGEMENT, LLC | New | $209.2k3.6k shares |
Biggest puts
| J. Goldman & Co LP | New | $3.3m56.2k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $1.2m20.6k shares |
| CITADEL ADVISORS LLC | Reduced | $1.1m18.3k shares |
| Walleye Capital LLC | Added | $586.8k10.1k shares |
| JANE STREET GROUP, LLC | Added | $505.5k8.7k shares |
| SIMPLEX TRADING, LLC | Added | $400.0k6.9k shares |
| Cubist Systematic Strategies, LLC | Reduced | $377.6k6.5k shares |
| WOLVERINE TRADING, LLC | Reduced | $280.8k4.9k shares |
| Walleye Trading LLC | Reduced | $104.6k1.8k shares |
| GROUP ONE TRADING LLC | New | $40.7k700 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 2025
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 2023 | 0 | — | 0 | — | — |
| Q3 2023 | 0 | — | 0 | — | — |
| Q4 2023 | 0 | — | 0 | — | — |
| Q1 2024 | 0 | — | 1 | $591.4k | — |
| 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 | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2025-02-28 | McDuffie Melkeya Director | Sold | $87.9k1.4k shares |
| 2025-01-27 | Rudolph Jacob T. SVP, CHRO | Bought | $2.8k49 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 2025
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.02% of their portfolio | 12.8m $740.9m | Reduced -26.2k |
| VANGUARD GROUP INC 0.01% of their portfolio | 10.1m $589.1m | Reduced -58.2k |
| ALLIANCEBERNSTEIN L.P. 0.17% of their portfolio | 8.0m $467.3m | Reduced -2.8m |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.05% of their portfolio | 7.3m $424.0m | Added +4.2m |
| WASATCH ADVISORS LP 1.81% of their portfolio | 5.6m $324.7m | Added +989.9k |
| STATE STREET CORP 0.01% of their portfolio | 3.3m $192.0m | Added +10.9k |
| Clearbridge Investments, LLC 0.16% of their portfolio | 3.2m $186.2m | Reduced -142.3k |
| Conestoga Capital Advisors, LLC 1.75% of their portfolio | 2.0m $116.3m | Added +34.7k |
| AMERICAN CENTURY COMPANIES INC 0.07% of their portfolio | 2.0m $114.6m | Added +784.8k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 1.9m $112.6m | Added +81.2k |
| Madison Asset Management, LLC 1.22% of their portfolio | 1.9m $109.9m | New |
| Balyasny Asset Management L.P. 0.27% of their portfolio | 1.9m $108.7m | Reduced -158.1k |
| MACQUARIE GROUP LTD 0.12% of their portfolio | 1.7m $99.7m | Reduced -25.4k |
| BAMCO INC /NY/ 0.27% of their portfolio | 1.6m $93.6m | Reduced -542.9k |
| GENEVA CAPITAL MANAGEMENT LLC 1.74% of their portfolio | 1.6m $93.0m | Added +8.7k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 1.6m $92.4m | Added +49.3k |
| CITADEL ADVISORS LLC 0.09% of their portfolio | 1.6m $90.9m | Added +692.9k |
| Liontrust Investment Partners LLP 1.35% of their portfolio | 1.5m $86.4m | Reduced -90.5k |
| Anomaly Capital Management, LP 3.77% of their portfolio | 1.4m $81.1m | Reduced -116.8k |
| MORGAN STANLEY 0.01% of their portfolio | 1.3m $78.4m | Added +37.9k |
| NEUBERGER BERMAN GROUP LLC 0.06% of their portfolio | 1.3m $73.9m | Added +710.5k |
| AustralianSuper Pty Ltd 0.41% of their portfolio | 1.2m $72.0m | Reduced -360.2k |
| Invesco Ltd. 0.01% of their portfolio | 1.2m $67.1m | Added +30.9k |
| DISCIPLINED GROWTH INVESTORS INC /MN 1.32% of their portfolio | 1.1m $63.6m | Added +715.1k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 1.0m $58.9m | Added +59.2k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 979.8k $56.9m | Added +53.2k |
| FEDERATED HERMES, INC. 0.11% of their portfolio | 915.9k $53.2m | Reduced -334.1k |
| Point72 Asset Management, L.P. 0.15% of their portfolio | 914.5k $53.1m | Reduced -1.0m |
| Impax Asset Management Group plc 0.32% of their portfolio | 909.4k $52.8m | Added +2.3k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 822.8k $47.8m | Added +387.2k |
| Thrivent Financial for Lutherans 0.10% of their portfolio | 792.3k $46.0m | Added +767.1k |
| VOYA INVESTMENT MANAGEMENT LLC 0.03% of their portfolio | 791.8k $46.0m | Added +472.5k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.01% of their portfolio | 777.2k $45.2m | Added +403.2k |
| FMR LLC 0.00% of their portfolio | 773.6k $44.9m | Added +368.7k |
| Bank of New York Mellon Corp 0.01% of their portfolio | 750.4k $43.6m | Reduced -29.2k |
| Stephens Investment Management Group LLC 0.62% of their portfolio | 745.4k $43.3m | Added +2.5k |
| Woodline Partners LP 0.28% of their portfolio | 739.1k $42.9m | Added +426.6k |
| NATIXIS ADVISORS, LLC 0.08% of their portfolio | 707.8k $41.1m | Added +656.8k |
| Capital Research Global Investors 0.01% of their portfolio | 705.3k $41.0m | Unchanged |
| WELLINGTON MANAGEMENT GROUP LLP 0.01% of their portfolio | 682.4k $39.6m | New |
| BLAIR WILLIAM & CO/IL 0.12% of their portfolio | 680.7k $39.5m | Added +48.0k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 672.9k $39.1m | Added +215.1k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.04% of their portfolio | 672.5k $39.1m | Added +73.5k |
| ROYAL BANK OF CANADA 0.01% of their portfolio | 668.3k $38.8m | Added +562.9k |
| PRINCIPAL FINANCIAL GROUP INC 0.02% of their portfolio | 629.0k $36.5m | Reduced -11.9k |
| NORGES BANK 0.01% of their portfolio | 619.1k $36.0m | Reduced -164.4k |
| TD Asset Management Inc 0.03% of their portfolio | 594.3k $34.5m | Reduced -381.5k |
| Baird Financial Group, Inc. 0.06% of their portfolio | 578.3k $33.6m | Reduced -98.1k |
| UBS Group AG 0.01% of their portfolio | 565.9k $32.9m | Reduced -100.7k |
| Broad Bay Capital Management, LP 4.69% of their portfolio | 537.2k $31.2m | New |
| AMERIPRISE FINANCIAL INC 0.01% of their portfolio | 521.2k $30.3m | Added +97.2k |
| Grantham, Mayo, Van Otterloo & Co. LLC 0.10% of their portfolio | 521.1k $30.3m | New |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.31% of their portfolio | 495.2k $28.8m | Reduced -23.6k |
| Artisan Partners Limited Partnership 0.04% of their portfolio | 463.1k $26.9m | Reduced -14.8k |
| Aperture Investors, LLC 3.88% of their portfolio | 439.8k $25.6m | Added +61.6k |
| LONDON CO OF VIRGINIA 0.14% of their portfolio | 422.9k $24.6m | Reduced -1.4k |
| DAVENPORT & Co LLC 0.14% of their portfolio | 417.0k $24.2m | Added +19.3k |
| Lombard Odier Asset Management (Europe) Ltd 1.93% of their portfolio | 414.1k $24.1m | Added +160.4k |
| SEI INVESTMENTS CO 0.03% of their portfolio | 404.8k $23.5m | Reduced -16.7k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 398.5k $23.2m | Added +145.2k |
| ENVESTNET ASSET MANAGEMENT INC 0.01% of their portfolio | 369.8k $21.5m | Added +42.6k |
| Pembroke Management, LTD 2.93% of their portfolio | 345.3k $20.1m | Reduced -23.3k |
| Epoch Investment Partners, Inc. 0.10% of their portfolio | 335.8k $19.5m | Reduced -217.8k |
| RHUMBLINE ADVISERS 0.02% of their portfolio | 325.4k $18.9m | Reduced -3.6k |
| STIFEL FINANCIAL CORP 0.02% of their portfolio | 323.2k $18.8m | Added +98.6k |
| SCHRODER INVESTMENT MANAGEMENT GROUP 0.02% of their portfolio | 320.3k $18.4m | Added +83.0k |
| AMERICAN CAPITAL MANAGEMENT INC 0.70% of their portfolio | 297.4k $17.3m | Added +137.1k |
| Montanaro Asset Management Ltd 4.99% of their portfolio | 292.8k $17.0m | Reduced -23.1k |
| AXA S.A. 0.05% of their portfolio | 280.2k $16.3m | Reduced -6.5k |
| Amundi 0.01% of their portfolio | 279.9k $15.6m | Added +20.8k |
| Fisher Asset Management, LLC 0.01% of their portfolio | 274.7k $16.0m | Added +56.2k |
| DEUTSCHE BANK AG\ 0.01% of their portfolio | 266.0k $15.5m | Reduced -102.8k |
| RAYMOND JAMES FINANCIAL INC 0.01% of their portfolio | 265.5k $15.4m | Added +9.5k |
| Nuveen, LLC 0.00% of their portfolio | 261.1k $15.2m | First filing |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.03% of their portfolio | 250.0k $14.5m | Reduced -174.0k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.06% of their portfolio | 249.2k $14.5m | Reduced -636.8k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.01% of their portfolio | 244.6k $14.2m | Reduced -138.7k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 236.4k $13.7m | Added +76.9k |
| COMERICA BANK 0.06% of their portfolio | 231.5k $13.5m | Added +21.9k |
| D. E. Shaw & Co., Inc. 0.02% of their portfolio | 226.9k $13.2m | Reduced -145.6k |
| TRILLIUM ASSET MANAGEMENT, LLC 0.37% of their portfolio | 220.7k $12.8m | Added +13.3k |
| FRED ALGER MANAGEMENT, LLC 0.07% of their portfolio | 215.1k $12.5m | Reduced -103.6k |
| Swiss National Bank 0.01% of their portfolio | 207.5k $12.1m | Reduced -6.3k |
| Erste Asset Management GmbH 0.15% of their portfolio | 205.2k $11.8m | Reduced -21.0k |
| DekaBank Deutsche Girozentrale 0.02% of their portfolio | 200.0k $11.3m | Unchanged |
| PineStone Asset Management Inc. 0.09% of their portfolio | 199.8k $11.6m | Added +37.2k |
| MARSHALL WACE, LLP 0.01% of their portfolio | 185.9k $10.8m | New |
| NEW YORK STATE COMMON RETIREMENT FUND 0.02% of their portfolio | 181.3k $10.5m | Added +4.6k |
| T. Rowe Price Investment Management, Inc. 0.01% of their portfolio | 179.7k $10.4m | New |
| Legal & General Group Plc 0.00% of their portfolio | 170.9k $9.9m | Reduced -2.7k |
| Summit Creek Advisors LLC 1.43% of their portfolio | 168.8k $9.8m | Added +23.6k |
| California Public Employees Retirement System 0.01% of their portfolio | 154.9k $9.0m | Reduced -18.5k |
| Walleye Capital LLC 0.10% of their portfolio | 151.8k $8.8m | Added +66.4k |
| MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio | 149.0k $8.7m | Reduced -335.7k |
| Masterton Capital Management, LP 5.67% of their portfolio | 143.1k $8.3m | Added +70.0k |
| Retirement Systems of Alabama 0.03% of their portfolio | 130.4k $7.6m | Added +129 |
| LPL Financial LLC 0.00% of their portfolio | 126.0k $7.3m | Reduced -1.4k |
| GW&K Investment Management, LLC 0.07% of their portfolio | 125.9k $7.3m | Reduced -739 |
| VAN ECK ASSOCIATES CORP 0.01% of their portfolio | 122.6k $7.1m | Added +11.9k |
| Empower Advisory Group, LLC 0.02% of their portfolio | 120.0k $7.0m | Added +6.2k |