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CECO Environmental CECO

US equityMarket cap rank #2206
$74.96 +$1.30 (+1.76%)
Market closed · Oct 5, 10:20 pm ET · Last extended-hours $74.96 0.00%
Open$74.32
Prev close$73.66
Day range$72.15 – $76.50
Volume623.9K
Market cap$4.39B
P/E (TTM)–
Dividend yield–

Ownership & positioning

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

Institutional ownership94.3%+0.09 pts vs. prior quarter
Institutions holding395-2 vs. prior quarter
Insider trades (recent)24 buys / 24 sellsBalanced
Short interest3.36% of floatDays to cover 2.7 · as of 15 Sep 2026
Short-sale volume share15.6%5-day average of daily volume

Short-sale volume as % of daily volume

7%15%24%32%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: +$30.8K (11 inflow days, 9 outflow days).

The five largest holders on file together own 29.6% of shares outstanding.

Largest holders

  • FMR7.72%
  • BlackRock7.38%
  • T. Rowe Price Group, Inc.5.10%
  • Icarus Investment Corp.4.73%
  • Vanguard Capital Management, LLC4.64%
  • Dimensional Fund Advisors3.73%
  • American Century Investment Management3.57%
  • Driehaus Capital Management LLC2.66%

By investor type

  • Mutual Fund76.86%
  • Hedge Fund7.89%
  • Individual/Insider6.00%
  • Private Company5.46%
  • Public Company2.61%
  • Government Pension Fund0.93%
  • Insurance Company0.32%
  • Family Office/Trust0.20%

Reported short interest has fallen from 6.03% to 3.36% 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 1,967,749 3.4% 2.7
31 Aug 2026 1,737,388 3.0% 2.7
14 Aug 2026 1,634,619 2.8% 1.6
31 Jul 2026 1,761,490 3.0% 1.8
15 Jul 2026 1,834,230 3.1% 2.6
30 Jun 2026 2,162,403 6.0% 2.5

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