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Trex Co. TREX

US equityMarket cap rank #2186
$44.21 +$0.65 (+1.49%)
Market closed · Oct 5, 10:20 pm ET · Last extended-hours $44.21 0.00%
Open$43.26
Prev close$43.56
Day range$42.93 – $44.92
Volume1.63M
Market cap$4.50B
P/E (TTM)26.0
Dividend yield–

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership107.9%-3.51 pts vs. prior quarter
Institutions holding549+1 vs. prior quarter
Insider trades (recent)33 buys / 14 sellsNet buying
Short interest9.96% of floatDays to cover 6.5 · as of 15 Sep 2026
Short-sale volume share15.0%5-day average of daily volume

Short-sale volume as % of daily volume

12%15%18%22%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: +$7.44M (9 inflow days, 11 outflow days).

The five largest holders on file together own 35.8% of shares outstanding.

Largest holders

  • Wellington Management Group10.36%
  • BlackRock10.30%
  • Millennium Management LLC5.47%
  • Vanguard Capital Management, LLC5.26%
  • Vanguard Portfolio Management, LLC4.36%
  • Wasatch Advisors LP3.69%
  • AQR Capital Management3.51%
  • American Century Investment Management3.25%

By investor type

  • Mutual Fund75.35%
  • Hedge Fund20.74%
  • Public Company5.93%
  • Private Company3.08%
  • Government Pension Fund1.24%
  • Sovereign Wealth Fund1.24%
  • Individual/Insider0.65%
  • Family Office/Trust0.13%

Reported short interest has fallen from 11.19% to 9.96% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).

Short interest, by report

Report dateShares short% of floatDays to cover
15 Sep 2026 10,148,200 10.0% 6.5
31 Aug 2026 10,501,459 10.3% 8.8
14 Aug 2026 10,161,174 10.0% 4.2
31 Jul 2026 10,593,376 10.2% 5.0
15 Jul 2026 11,914,150 11.5% 6.0
30 Jun 2026 11,628,765 11.2% 5.5

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