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 ($23.6m this quarter). Holder counts are more reliable. Shares outstanding: 107.2m as of 2025-07-18, 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 ≈ $54.37. Options: 12 managers hold calls ($16.1m notional), 11 hold puts ($27.9m).
Trends to Q2 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 |
| Q2 2025 | 447 |
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 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 |
| Q2 2025 | 221 | 220 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $28.9m | $11.7m | 0.40 |
| Q4 2024 | $10.6m | $11.9m | 1.12 |
| Q1 2025 | $9.7m | $7.8m | 0.81 |
| Q2 2025 | $16.1m | $27.9m | 1.74 |
Biggest buyers
| ROYAL BANK OF CANADA | Added | +1.3m |
| Kinetic Partners Management, LP | New | +1.1m |
| T. Rowe Price Investment Management, Inc. | Added | +980.1k |
| MILLENNIUM MANAGEMENT LLC | Added | +730.6k |
| BANK OF AMERICA CORP /DE/ | Added | +626.5k |
| CITIGROUP INC | Added | +610.2k |
| JANE STREET GROUP, LLC | New | +597.1k |
| Anomaly Capital Management, LP | Added | +569.2k |
| NEUBERGER BERMAN GROUP LLC | Added | +559.3k |
| FMR LLC | Added | +452.7k |
Biggest sellers
| CITADEL ADVISORS LLC | Reduced | -1.2m |
| Balyasny Asset Management L.P. | Reduced | -1.1m |
| Invesco Ltd. | Reduced | -967.1k |
| AustralianSuper Pty Ltd | Reduced | -765.1k |
| ALLIANCEBERNSTEIN L.P. | Reduced | -641.1k |
| TD Asset Management Inc | Reduced | -558.6k |
| Broad Bay Capital Management, LP | Sold out | -537.2k |
| BlackRock, Inc. | Reduced | -518.9k |
| Artisan Partners Limited Partnership | Sold out | -463.1k |
| WASATCH ADVISORS LP | Reduced | -403.7k |
Biggest calls
| Eisler Capital Management Ltd. | New | $3.4m62.4k shares |
| Caption Management, LLC | New | $3.3m60.0k shares |
| CITADEL ADVISORS LLC | Added | $2.4m44.9k shares |
| JANE STREET GROUP, LLC | Reduced | $1.8m32.2k shares |
| Walleye Capital LLC | Added | $1.7m30.5k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $1.4m25.5k shares |
| Walleye Trading LLC | Added | $902.7k16.6k shares |
| TUDOR INVESTMENT CORP ET AL | New | $478.5k8.8k shares |
| WOLVERINE TRADING, LLC | Reduced | $466.5k8.5k shares |
| SIMPLEX TRADING, LLC | Added | $266.0k4.9k shares |
Biggest puts
| Walleye Trading LLC | Added | $9.7m177.8k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $6.8m125.0k shares |
| CITADEL ADVISORS LLC | Added | $3.5m63.8k shares |
| Twin Tree Management, LP | New | $3.3m61.6k shares |
| SIMPLEX TRADING, LLC | Added | $1.9m34.5k shares |
| Walleye Capital LLC | Added | $1.3m23.6k shares |
| IMC-Chicago, LLC | New | $647.1k11.9k shares |
| JANE STREET GROUP, LLC | Reduced | $440.5k8.1k shares |
| WOLVERINE TRADING, LLC | Added | $312.8k5.7k shares |
| GROUP ONE TRADING LLC | Added | $54.4k1.0k 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 Q2 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 |
|---|---|---|---|---|---|
| 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 | — |
| Q2 2025 | 1 | $2.6k | 2 | $235.1k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2025-05-15 | Rudolph Jacob T. SVP, CHRO | Sold | $90.4k1.5k shares |
| 2025-05-12 | Fernandez Amy M. SVP, CLO and Secretary | Sold | $144.7k2.4k shares |
| 2025-04-08 | Rudolph Jacob T. SVP, CHRO | Bought | $2.6k53 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 2025
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.01% of their portfolio | 12.2m $665.2m | Reduced -518.9k |
| VANGUARD GROUP INC 0.01% of their portfolio | 10.1m $546.8m | Reduced -84.7k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.05% of their portfolio | 7.7m $419.2m | Added +411.5k |
| ALLIANCEBERNSTEIN L.P. 0.13% of their portfolio | 7.4m $402.5m | Reduced -641.1k |
| WASATCH ADVISORS LP 1.48% of their portfolio | 5.2m $282.0m | Reduced -403.7k |
| STATE STREET CORP 0.01% of their portfolio | 3.2m $174.8m | Reduced -89.4k |
| Clearbridge Investments, LLC 0.13% of their portfolio | 2.9m $160.4m | Reduced -255.5k |
| AMERICAN CENTURY COMPANIES INC 0.06% of their portfolio | 2.1m $116.3m | Added +165.8k |
| ROYAL BANK OF CANADA 0.01% of their portfolio | 2.0m $109.7m | Added +1.3m |
| Conestoga Capital Advisors, LLC 1.60% of their portfolio | 2.0m $108.6m | Reduced -5.9k |
| Anomaly Capital Management, LP 3.40% of their portfolio | 2.0m $106.9m | Added +569.2k |
| Madison Asset Management, LLC 1.10% of their portfolio | 1.9m $101.7m | Reduced -19.7k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 1.9m $100.7m | Reduced -85.5k |
| NEUBERGER BERMAN GROUP LLC 0.08% of their portfolio | 1.8m $99.6m | Added +559.3k |
| GENEVA CAPITAL MANAGEMENT LLC 1.57% of their portfolio | 1.7m $93.7m | Added +121.7k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 1.6m $88.9m | Added +44.4k |
| BAMCO INC /NY/ 0.23% of their portfolio | 1.6m $85.8m | Reduced -31.8k |
| MACQUARIE GROUP LTD 0.10% of their portfolio | 1.6m $85.1m | Reduced -151.4k |
| MORGAN STANLEY 0.01% of their portfolio | 1.5m $83.7m | Added +189.8k |
| Liontrust Investment Partners LLP 1.09% of their portfolio | 1.4m $76.4m | Reduced -81.1k |
| BANK OF AMERICA CORP /DE/ 0.01% of their portfolio | 1.3m $70.7m | Added +626.5k |
| FMR LLC 0.00% of their portfolio | 1.2m $66.7m | Added +452.7k |
| T. Rowe Price Investment Management, Inc. 0.04% of their portfolio | 1.2m $63.1m | Added +980.1k |
| DISCIPLINED GROWTH INVESTORS INC /MN 1.13% of their portfolio | 1.1m $59.2m | Reduced -6.3k |
| Kinetic Partners Management, LP 3.15% of their portfolio | 1.1m $57.6m | New |
| WELLINGTON MANAGEMENT GROUP LLP 0.01% of their portfolio | 1.1m $57.5m | Added +374.3k |
| NORGES BANK 0.01% of their portfolio | 1.0m $54.8m | Added +388.5k |
| Impax Asset Management Group plc 0.31% of their portfolio | 1.0m $54.5m | Added +92.9k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 978.7k $53.2m | Reduced -1.1k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 972.1k $52.9m | Reduced -41.9k |
| Point72 Asset Management, L.P. 0.12% of their portfolio | 898.5k $48.9m | Reduced -16.0k |
| MILLENNIUM MANAGEMENT LLC 0.04% of their portfolio | 879.7k $47.8m | Added +730.6k |
| Thrivent Financial for Lutherans 0.10% of their portfolio | 840.2k $45.7m | Added +47.8k |
| Woodline Partners LP 0.23% of their portfolio | 798.6k $43.4m | Added +59.6k |
| Balyasny Asset Management L.P. 0.10% of their portfolio | 789.5k $42.9m | Reduced -1.1m |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.01% of their portfolio | 774.1k $42.1m | Reduced -3.1k |
| FEDERATED HERMES, INC. 0.08% of their portfolio | 771.2k $41.9m | Reduced -144.7k |
| Stephens Investment Management Group LLC 0.52% of their portfolio | 726.4k $39.5m | Reduced -19.0k |
| Bank of New York Mellon Corp 0.01% of their portfolio | 709.1k $38.6m | Reduced -41.2k |
| Capital Research Global Investors 0.01% of their portfolio | 705.3k $38.4m | Unchanged |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.03% of their portfolio | 694.2k $37.8m | Added +21.7k |
| CITIGROUP INC 0.03% of their portfolio | 684.9k $37.2m | Added +610.2k |
| NATIXIS ADVISORS, LLC 0.06% of their portfolio | 679.3k $36.9m | Reduced -28.6k |
| PRINCIPAL FINANCIAL GROUP INC 0.02% of their portfolio | 611.8k $33.3m | Reduced -17.2k |
| UBS Group AG 0.01% of their portfolio | 603.5k $32.8m | Added +37.6k |
| JANE STREET GROUP, LLC 0.05% of their portfolio | 597.1k $32.5m | New |
| BLAIR WILLIAM & CO/IL 0.09% of their portfolio | 567.2k $30.8m | Reduced -113.5k |
| Grantham, Mayo, Van Otterloo & Co. LLC 0.09% of their portfolio | 558.7k $30.4m | Added +37.6k |
| VOYA INVESTMENT MANAGEMENT LLC 0.03% of their portfolio | 554.2k $30.1m | Reduced -237.6k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 547.4k $29.8m | Reduced -275.3k |
| Nuveen, LLC 0.01% of their portfolio | 541.3k $29.4m | Added +280.1k |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.25% of their portfolio | 498.6k $27.1m | Added +3.4k |
| RAYMOND JAMES FINANCIAL INC 0.01% of their portfolio | 490.2k $26.7m | Added +224.7k |
| Baird Financial Group, Inc. 0.05% of their portfolio | 489.7k $26.6m | Reduced -88.5k |
| AustralianSuper Pty Ltd 0.13% of their portfolio | 474.2k $25.8m | Reduced -765.1k |
| Pembroke Management, LTD 2.81% of their portfolio | 427.2k $23.2m | Added +82.0k |
| LONDON CO OF VIRGINIA 0.13% of their portfolio | 425.9k $23.2m | Added +3.0k |
| DAVENPORT & Co LLC 0.13% of their portfolio | 422.9k $23.2m | Added +5.9k |
| ENVESTNET ASSET MANAGEMENT INC 0.01% of their portfolio | 385.3k $21.0m | Added +15.5k |
| SEI INVESTMENTS CO 0.02% of their portfolio | 352.0k $19.1m | Reduced -52.8k |
| CITADEL ADVISORS LLC 0.02% of their portfolio | 345.0k $18.8m | Reduced -1.2m |
| Montanaro Asset Management Ltd 4.21% of their portfolio | 300.5k $16.3m | Added +7.7k |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 298.2k $16.2m | Reduced -27.2k |
| STIFEL FINANCIAL CORP 0.01% of their portfolio | 281.4k $15.3m | Reduced -41.8k |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. 0.14% of their portfolio | 276.9k $15.1m | New |
| Fisher Asset Management, LLC 0.01% of their portfolio | 276.6k $15.0m | Added +1.9k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 267.0k $14.5m | Reduced -254.3k |
| Cubist Systematic Strategies, LLC 0.16% of their portfolio | 265.0k $14.4m | New |
| AMERICAN CAPITAL MANAGEMENT INC 0.59% of their portfolio | 262.8k $14.3m | Reduced -34.6k |
| DEUTSCHE BANK AG\ 0.01% of their portfolio | 257.7k $14.0m | Reduced -8.4k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 257.0k $14.0m | Added +20.5k |
| VICTORY CAPITAL MANAGEMENT INC 0.01% of their portfolio | 246.5k $13.4m | Added +187.3k |
| PineStone Asset Management Inc. 0.08% of their portfolio | 239.8k $13.0m | Added +40.0k |
| Aperture Investors, LLC 1.74% of their portfolio | 238.0k $12.9m | Reduced -201.8k |
| COMERICA BANK 0.05% of their portfolio | 231.2k $12.6m | Reduced -320 |
| Erste Asset Management GmbH 0.10% of their portfolio | 227.2k $12.5m | Added +22.0k |
| TRILLIUM ASSET MANAGEMENT, LLC 0.31% of their portfolio | 213.9k $11.6m | Reduced -6.8k |
| Swiss National Bank 0.01% of their portfolio | 204.8k $11.1m | Reduced -2.7k |
| DekaBank Deutsche Girozentrale 0.02% of their portfolio | 200.0k $10.9m | Unchanged |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 198.9k $10.8m | Reduced -199.6k |
| Invesco Ltd. 0.00% of their portfolio | 187.1k $10.2m | Reduced -967.1k |
| Lombard Odier Asset Management (Europe) Ltd 0.68% of their portfolio | 175.5k $9.5m | Reduced -238.5k |
| Legal & General Group Plc 0.00% of their portfolio | 171.4k $9.3m | Added +547 |
| California Public Employees Retirement System 0.01% of their portfolio | 165.1k $9.0m | Added +10.2k |
| Summit Creek Advisors LLC 1.22% of their portfolio | 161.9k $8.8m | Reduced -6.9k |
| TWO SIGMA INVESTMENTS, LP 0.02% of their portfolio | 160.0k $8.7m | New |
| OSTERWEIS CAPITAL MANAGEMENT INC 0.40% of their portfolio | 154.3k $8.4m | New |
| Trexquant Investment LP 0.08% of their portfolio | 138.3k $7.5m | New |
| LPL Financial LLC 0.00% of their portfolio | 137.3k $7.5m | Added +11.3k |
| Empower Advisory Group, LLC 0.02% of their portfolio | 131.7k $7.2m | Added +11.6k |
| Retirement Systems of Alabama 0.03% of their portfolio | 131.1k $7.1m | Added +650 |
| GW&K Investment Management, LLC 0.06% of their portfolio | 125.8k $6.8m | Reduced -98 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.00% of their portfolio | 125.3k $6.8m | Reduced -119.4k |
| Brevan Howard Capital Management LP 0.07% of their portfolio | 120.1k $6.5m | Added +112.2k |
| BARCLAYS PLC 0.00% of their portfolio | 117.4k $6.4m | Added +33.2k |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.01% of their portfolio | 114.9k $6.3m | Added +1.2k |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 110.8k $6.0m | Added +43.3k |
| HRT FINANCIAL LP 0.03% of their portfolio | 109.5k $6.0m | Added +105.9k |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 109.0k $5.9m | Unchanged |
| Park State Asset Management 3.79% of their portfolio | 108.7k $5.9m | Reduced -6.2k |