CECO ENVIRONMENTAL CORP CECO
COM · Common Stock · CUSIP 125141101
- SectorIndustrials
- IndustryIndustrial & Commercial Fans & Blowers & Air Purifing Equip
- HeadquartersAddison, TX
- Founded1966
- Websitececoenviro.com
- FilingsSEC EDGAR
* 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 ($1.4m this quarter). Holder counts are more reliable. Shares outstanding: 35.3m 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 ≈ $28.31. Options: 6 managers hold calls ($3.3m notional), 3 hold puts ($384.0k).
Trends to Q2 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 113 |
| Q4 2022 | 121 |
| Q1 2023 | 141 |
| Q2 2023 | 145 |
| Q3 2023 | 148 |
| Q4 2023 | 158 |
| Q1 2024 | 176 |
| Q2 2024 | 179 |
| Q3 2024 | 176 |
| Q4 2024 | 178 |
| Q1 2025 | 173 |
| Q2 2025 | 181 |
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 | 60 | 78 |
| Q4 2023 | 70 | 75 |
| Q1 2024 | 81 | 74 |
| Q2 2024 | 88 | 93 |
| Q3 2024 | 72 | 89 |
| Q4 2024 | 73 | 85 |
| Q1 2025 | 68 | 91 |
| Q2 2025 | 93 | 70 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $1.7m | $72.5k | 0.04 |
| Q4 2024 | $577.4k | $69.5k | 0.12 |
| Q1 2025 | $1.5m | $189.0k | 0.12 |
| Q2 2025 | $3.3m | $384.0k | 0.12 |
Biggest buyers
| WELLINGTON MANAGEMENT GROUP LLP | Added | +359.6k |
| JANUS HENDERSON GROUP PLC | Added | +300.6k |
| SEGALL BRYANT & HAMILL, LLC | New | +261.2k |
| OSTERWEIS CAPITAL MANAGEMENT INC | New | +253.4k |
| CSM Advisors, LLC | New | +185.4k |
| FMR LLC | Added | +164.0k |
| G2 Investment Partners Management LLC | New | +120.0k |
| VANGUARD GROUP INC | Added | +118.2k |
| CITADEL ADVISORS LLC | Added | +114.4k |
| Pier Capital, LLC | New | +113.9k |
Biggest sellers
| ACK Asset Management LLC | Sold out | -1.2m |
| VOYA INVESTMENT MANAGEMENT LLC | Reduced | -619.5k |
| Allspring Global Investments Holdings, LLC | Reduced | -94.5k |
| Manatuck Hill Partners, LLC | Sold out | -73.3k |
| Squarepoint Ops LLC | Reduced | -67.7k |
| Robeco Schweiz AG | Reduced | -66.0k |
| DIMENSIONAL FUND ADVISORS LP | Reduced | -55.9k |
| AMERICAN CENTURY COMPANIES INC | Reduced | -49.8k |
| Cruiser Capital Advisors, LLC | Sold out | -49.6k |
| TWO SIGMA INVESTMENTS, LP | Reduced | -47.2k |
Biggest calls
| PEAK6 LLC | Added | $2.8m100.0k shares |
| CITADEL ADVISORS LLC | Added | $226.5k8.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $226.5k8.0k shares |
| SIMPLEX TRADING, LLC | Unchanged | $25.0k900 shares |
| GROUP ONE TRADING LLC | Added | $14.2k500 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| PEAK6 LLC | New | $368.0k13.0k shares |
| SIMPLEX TRADING, LLC | Added | $16.0k600 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 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 |
|---|---|
DEZWIREK JASON
13D · may seek influence
filed 2026-02-26
Stated purposeItem 4 of the Schedule 13D is hereby amended and supplemented by adding the following at the end thereof: On February 23, 2026, the Issuer, Longhorn Merger Sub Inc., a Delaware corporation and wholly owned subsidiary of the Issuer ("Merger Sub Inc."), and Longhorn Merger Sub LLC, a Delaware limited liability company and wholly owned subsidiary of the Issuer ("Merger Sub LLC"), and Thermon Group Holdings, Inc., a Delaware corporation ("Thermon") entered into an Agreement and Plan of Merger, dated as of February 23, 2026 (the "Merger Agreement"), which provided for, among other things, (i) the merger of Merger Sub Inc. with and into Thermon, with Thermon continuing as the surviving entity (the "Surviving Corporation") (the "First Merger") and (ii) immediately following the First Merger, the… Full filing |
11.7% |
| FMR LLC 13G · institution +1.5 pts · filed 2026-08-06 | 7.7% |
| BlackRock, Inc. 13G · institution filed 2025-07-16 | 6.3% |
Fell to 5% or below in the last year: AMERICAN CENTURY INVESTMENT MANAGEMENT INC (3.6%, 2026-08-14), T. Rowe Price Investment Management, Inc. (3.7%, 2026-08-14), VANGUARD GROUP INC (5.0%, 2026-01-30)
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 | 1 | $325.0k | 0 | — | — |
| Q4 2023 | 0 | — | 1 | $306.1k | — |
| Q1 2024 | 2 | $1.0m | 0 | — | — |
| Q2 2024 | 1 | $207.8k | 0 | — | — |
| Q3 2024 | 1 | $287.7k | 0 | — | — |
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 1 | $377.8k | 1 | $648.3k | — |
| Q2 2025 | 0 | — | 0 | — | — |
None reported in Q2 2025.
Holders, Q2 2025
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.00% of their portfolio | 2.2m $63.4m | Reduced -25.9k |
| FMR LLC 0.00% of their portfolio | 2.2m $61.6m | Added +164.0k |
| Capital International Investors 0.01% of their portfolio | 2.0m $55.8m | Unchanged |
| Hood River Capital Management LLC 0.77% of their portfolio | 1.9m $55.0m | Added +14.1k |
| VANGUARD GROUP INC 0.00% of their portfolio | 1.8m $49.7m | Added +118.2k |
| DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio | 1.2m $33.9m | Reduced -55.9k |
| KING LUTHER CAPITAL MANAGEMENT CORP 0.14% of their portfolio | 1.2m $33.3m | Added +51.4k |
| ROYCE & ASSOCIATES LP 0.29% of their portfolio | 1.0m $28.5m | Added +60.6k |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.07% of their portfolio | 945.9k $26.8m | Added +44.3k |
| JANUS HENDERSON GROUP PLC 0.01% of their portfolio | 941.1k $26.6m | Added +300.6k |
| WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio | 901.6k $25.5m | Added +359.6k |
| Thrivent Financial for Lutherans 0.05% of their portfolio | 757.4k $21.4m | Added +15.2k |
| VOYA INVESTMENT MANAGEMENT LLC 0.02% of their portfolio | 716.6k $20.3m | Reduced -619.5k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 712.3k $20.2m | Added +18.5k |
| STATE STREET CORP 0.00% of their portfolio | 657.6k $18.6m | Added +8.2k |
| Legal & General Group Plc 0.00% of their portfolio | 652.3k $18.5m | Added +74.5k |
| Driehaus Capital Management LLC 0.14% of their portfolio | 610.0k $17.3m | Added +28.4k |
| First Eagle Investment Management, LLC 0.03% of their portfolio | 601.5k $17.0m | Added +13.2k |
| Robeco Schweiz AG 0.30% of their portfolio | 452.2k $12.8m | Reduced -66.0k |
| LOOMIS SAYLES & CO L P 0.02% of their portfolio | 444.3k $12.6m | Reduced -1.6k |
| Granahan Investment Management, LLC 0.41% of their portfolio | 352.1k $10.0m | Added +34.7k |
| Allspring Global Investments Holdings, LLC 0.02% of their portfolio | 348.4k $9.9m | Reduced -94.5k |
| PEREGRINE CAPITAL MANAGEMENT LLC 0.25% of their portfolio | 294.9k $8.4m | Added +54.4k |
| MARTIN & CO INC /TN/ 1.50% of their portfolio | 287.6k $8.1m | Reduced -2.4k |
| SEGALL BRYANT & HAMILL, LLC 0.10% of their portfolio | 261.2k $7.4m | New |
| Advantage Alpha Capital Partners LP 1.98% of their portfolio | 259.7k $7.4m | Reduced -7.3k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 255.7k $7.2m | Reduced -17.9k |
| OSTERWEIS CAPITAL MANAGEMENT INC 0.34% of their portfolio | 253.4k $7.2m | New |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 238.8k $6.8m | Added +6.3k |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.04% of their portfolio | 212.1k $6.0m | Added +10.9k |
| KENNEDY CAPITAL MANAGEMENT LLC 0.14% of their portfolio | 203.6k $5.8m | Added +14.7k |
| Amundi 0.00% of their portfolio | 196.8k $5.7m | Added +15.0k |
| CSM Advisors, LLC 0.15% of their portfolio | 185.4k $5.2m | New |
| MORGAN STANLEY 0.00% of their portfolio | 155.5k $4.4m | Added +13.4k |
| ESSEX INVESTMENT MANAGEMENT CO LLC 0.79% of their portfolio | 152.7k $4.3m | Reduced -1.1k |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 145.2k $4.1m | Added +5.5k |
| GREAT LAKES ADVISORS, LLC 0.03% of their portfolio | 130.8k $3.7m | Reduced -3.6k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 125.2k $3.5m | Added +114.4k |
| VAN ECK ASSOCIATES CORP 0.00% of their portfolio | 123.7k $3.5m | Added +56.3k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 121.9k $3.5m | Added +1.4k |
| G2 Investment Partners Management LLC 0.74% of their portfolio | 120.0k $3.4m | New |
| Pier Capital, LLC 0.49% of their portfolio | 113.9k $3.2m | New |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 110.4k $3.1m | Added +17.2k |
| Expect Equity LLC 3.27% of their portfolio | 108.1k $3.1m | Unchanged |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 104.8k $3.0m | Added +49.6k |
| MARATHON CAPITAL MANAGEMENT 0.75% of their portfolio | 103.9k $2.9m | Added +6.0k |
| FORMULA GROWTH LTD 1.09% of their portfolio | 102.2k $2.9m | Reduced -34.3k |
| FRED ALGER MANAGEMENT, LLC 0.01% of their portfolio | 84.7k $2.1m | Added +62.5k |
| MACQUARIE GROUP LTD 0.00% of their portfolio | 83.1k $2.4m | Added +13.3k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 82.2k $2.3m | Reduced -9.2k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 76.9k $2.2m | Added +1.1k |
| Continuum Advisory, LLC 0.26% of their portfolio | 74.9k $2.1m | Unchanged |
| Universal- Beteiligungs- und Servicegesellschaft mbH 0.00% of their portfolio | 74.4k $2.1m | Unchanged |
| HARBOR CAPITAL ADVISORS, INC. 0.09% of their portfolio | 72.7k $2.1m | Added +6.1k |
| UBS Group AG 0.00% of their portfolio | 69.2k $2.0m | Reduced -33.1k |
| SEI INVESTMENTS CO 0.00% of their portfolio | 67.8k $1.9m | Added +3.7k |
| WHITE PINE CAPITAL LLC 0.59% of their portfolio | 65.5k $1.9m | Added +6.0k |
| Nuveen, LLC 0.00% of their portfolio | 64.3k $1.8m | Reduced -15.5k |
| BAILARD, INC. 0.04% of their portfolio | 63.5k $1.8m | Reduced -578 |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 60.3k $1.7m | Added +14.3k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 58.3k $1.7m | Reduced -33.0k |
| BARCLAYS PLC 0.00% of their portfolio | 57.1k $1.6m | Added +19.2k |
| Swiss National Bank 0.00% of their portfolio | 56.8k $1.6m | Reduced -800 |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 56.4k $1.6m | Added +41.7k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 53.2k $1.5m | Reduced -40.1k |
| Janney Montgomery Scott LLC 0.00% of their portfolio | 49.6k $1.4m | Reduced -2.2k |
| Assenagon Asset Management S.A. 0.00% of their portfolio | 49.5k $1.4m | Unchanged |
| ExodusPoint Capital Management, LP 0.02% of their portfolio | 48.4k $1.4m | New |
| Legato Capital Management LLC 0.15% of their portfolio | 45.6k $1.3m | Reduced -106 |
| North Star Investment Management Corp. 0.09% of their portfolio | 45.1k $1.3m | Added +1.1k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 43.1k $1.2m | Added +991 |
| Invesco Ltd. 0.00% of their portfolio | 42.1k $1.2m | Reduced -5.4k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.00% of their portfolio | 40.5k $1.1m | Unchanged |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 40.3k $1.1m | Reduced -3.2k |
| Squarepoint Ops LLC 0.00% of their portfolio | 39.3k $1.1m | Reduced -67.7k |
| Calamos Advisors LLC 0.00% of their portfolio | 31.2k $884.0k | Added +14.3k |
| BOOTHBAY FUND MANAGEMENT, LLC 0.03% of their portfolio | 30.7k $870.4k | New |
| Empirical Asset Management, LLC 0.27% of their portfolio | 30.7k $869.4k | Unchanged |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 30.1k $852.7k | Unchanged |
| SageView Advisory Group, LLC 0.04% of their portfolio | 29.6k $1.0m | Added +290 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 27.4k $776.5k | Reduced -333 |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd 0.07% of their portfolio | 26.3k $744.1k | Added +7.3k |
| IQ EQ FUND MANAGEMENT (SINGAPORE) PRIVATE Ltd 1.04% of their portfolio | 25.0k $707.0k | Reduced -22.5k |
| Marex Group Ltd 0.01% of their portfolio | 25.0k $707.0k | Reduced -17.0k |
| CITIGROUP INC 0.00% of their portfolio | 24.6k $696.3k | Reduced -782 |
| NorthCrest Asset Manangement, LLC 0.02% of their portfolio | 23.1k $693.9k | Reduced -10.5k |
| Cox Capital Mgt LLC 0.43% of their portfolio | 22.5k $637.1k | Unchanged |
| Boston Partners 0.00% of their portfolio | 21.2k $599.5k | Reduced -2.5k |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 21.0k $593.5k | Added +19.0k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 20.6k $584.1k | Reduced -2.9k |
| POLEN CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 18.3k $518.6k | New |
| BANTAMAC CAPITAL, LLC 0.19% of their portfolio | 18.3k $518.6k | Reduced -12.5k |
| XTX Topco Ltd 0.02% of their portfolio | 17.9k $507.0k | Added +8.4k |
| OFI INVEST ASSET MANAGEMENT 0.01% of their portfolio | 17.9k $431.0k | Unchanged |
| MetLife Investment Management, LLC 0.00% of their portfolio | 17.0k $481.6k | Unchanged |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 17.0k $480.5k | Reduced -1.3k |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC 0.00% of their portfolio | 16.7k $472.4k | Reduced -1.4k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 16.0k $452.7k | Reduced -1.5k |
| INTECH INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 15.5k $438.1k | Unchanged |
| Private Advisor Group, LLC 0.00% of their portfolio | 14.9k $421.7k | Reduced -118 |