Ceco Environmental Corp.
A maker of engineered systems that clean industrial air and water, CECO Environmental builds pollution-control and fluid-handling equipment used by power plants, oil and gas refineries, and semiconductor and battery factories. Founded in 1966 as the Claremont Engineering Company, it took its name from those initials—CECO—and has grown through acquisitions. In 2026 it signed a deal to merge with Thermon Group Holdings, a maker of industrial heating products.
Granted 99.3K · Bought 158.9K · Sold 168.0K
Bought 90.3K
Sold 30.0K
Granted 2.35M · Bought 2.38M · Sold 3.30M
Granted 25.0K · Bought 191.2K · Sold 1.47M
Bought 30.0K
Bought 22.9K
Bought 223.4K · Sold 2.2K
Bought 1.50M · Sold 213.0K
Granted 993.2K · Bought 1.8K · Sold 325.5K
Granted 55.4K · Bought 253.5K
Granted 131.8K · Bought 58.3K
Granted 177.7K · Bought 9.2K
Granted 443.0K · Bought 27.9K · Sold 60.0K
Granted 114.7K · Bought 23.5K
Granted 60.6K · Bought 47.5K
Granted 100.3K · Bought 5.0K
Granted 84.8K · Bought 14.0K · Sold 4.6K
Granted 92.2K · Bought 6.5K · Sold 20.0K
Granted 82.5K · Bought 3.6K · Sold 12.1K
Granted 83.1K
Granted 64.8K · Bought 4.5K
Granted 75.5K · Sold 11.2K
Granted 61.4K · Sold 11.9K
Granted 51.8K
Granted 7.1K
Granted 236.5K · Bought 10.0K · Sold 224.0K
Granted 120.9K · Sold 58.1K
Granted 38.9K
Granted 23.8K · Bought 2.7K
Granted 11.6K
Granted 19.6K · Bought 2.5K
Granted 22.0K
Granted 34.4K · Sold 13.0K
Granted 20.9K · Sold 502
Granted 176.4K · Sold 177.0K
Granted 10.7K
Granted 25.9K · Bought 10.4K · Sold 20.3K
Granted 13.1K
Granted 6.0K · Bought 2.0K
Granted 6.4K
Granted 18.0K · Sold 13.0K
Sold 125
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Dezwirek JasonDirector · 39 transactions | — | 8.15M | 99.3K | 158.9K | 168.0K |
| Dezwirek Jason +1 co-filerDirector, 10% owner, 10% owner · 4 transactions | — | 5.24Mas of Dec 2015 | — | 90.3K | — |
| Harvey Sandler Revocable Trust +1 co-filer10% owner · 8 transactions | — | 3.98Mas of Oct 2013 | — | — | 30.0K |
| Dezwirek PhillipChairman, Director, 10% owner · 379 transactions | — | 3.30Mas of Dec 2012 | 2.35M | 2.38M | 3.30M |
| Dezwirek Jason LouisSecretary, Director, 10% owner · 55 transactions | — | 2.63Mas of May 2010 | 25.0K | 191.2K | 1.47M |
| Icarus Investment Corp10% owner · 4 transactions | — | 2.57Mas of Nov 2012 | — | 30.0K | — |
| Icarus Investment Corp.10% owner · 11 transactions | — | 2.19Mas of Jan 2011 | — | 22.9K | — |
| Harvey Sandler Revocable Trust10% owner · 31 transactions | — | 1.48Mas of Sep 2007 | — | 223.4K | 2.2K |
| Dezwirek Jason +1 co-filerDirector, 10% owner, Secretary, 10% owner · 205 transactions | — | 1.16Mas of May 2011 | — | 1.50M | 213.0K |
| Gleason Todd RChief Executive Officer, Director · 42 transactions | — | 863.7K | 993.2K | 1.8K | 325.5K |
| Wallman Richard FDirector · 36 transactions | — | 639.3K | 55.4K | 253.5K | — |
| Pollack JonathanDirector · 19 transactions | — | 286.7Kas of Aug 2021 | 131.8K | 58.3K | — |
| Eckl MatthewChief Financial Officer · 13 transactions | — | 190.5Kas of Mar 2022 | 177.7K | 9.2K | — |
| Lang JeffreyCEO and President, Director · 25 transactions | — | 156.0Kas of Dec 2016 | 443.0K | 27.9K | 60.0K |
| Sadlowski DennisChief Executive Officer, Director · 18 transactions | — | 138.2Kas of Jun 2020 | 114.7K | 23.5K | — |
| Liner David BDirector · 16 transactions | — | 118.1Kas of Mar 2023 | 60.6K | 47.5K | — |
| Sachs Valerie GentileDirector · 14 transactions | — | 105.3K | 100.3K | 5.0K | — |
| Wright DonaldDirector · 22 transactions | — | 104.2Kas of May 2017 | 84.8K | 14.0K | 4.6K |
| Mannarino Claudio ADirector · 18 transactions | — | 78.7K | 92.2K | 6.5K | 20.0K |
| Nuggihalli RameshChief Operating Officer · 10 transactions | — | 73.9Kas of Mar 2023 | 82.5K | 3.6K | 12.1K |
| Watkins-Asiyanbi JoycelynnSee Remarks. · 14 transactions | — | 73.2Kas of Jun 2025 | 83.1K | — | — |
| Goldberg Eric MichaelDirector · 9 transactions | — | 69.3Kas of May 2021 | 64.8K | 4.5K | — |
| Nanda MunishDirector · 10 transactions | — | 64.2K | 75.5K | — | 11.2K |
| Gohr Paul MChief Accounting Officer · 10 transactions | — | 54.6Kas of Mar 2023 | 61.4K | — | 11.9K |
| Blazer Dennis WCFO, VP of Finance and Admin · 5 transactions | — | 51.8Kas of Jan 2008 | 51.8K | — | — |
| Henry ChasitySee Remarks · 1 transaction | — | 48.9Kas of Nov 2021 | 7.1K | — | — |
| Blum RichardPresident, Director · 8 transactions | — | 40.8Kas of Aug 2009 | 236.5K | 10.0K | 224.0K |
| Johansson Peter K.SVP, Chief Financial Officer · 20 transactions | — | 40.7K | 120.9K | — | 58.1K |
| George Marcus JDirector · 2 transactions | — | 36.7K | 38.9K | — | — |
| Rudin SethDirector · 6 transactions | — | 27.8Kas of Nov 2017 | 23.8K | 2.7K | — |
| Gregory Alyson NoelGeneral Counsel · 6 transactions | — | 23.0K | 11.6K | — | — |
| Siegel LaurieDirector · 5 transactions | — | 22.1K | 19.6K | 2.5K | — |
| Harris-Peterson CandaceChief Human Resources Officer · 7 transactions | — | 22.0K | 22.0K | — | — |
| Cape ArthurDirector · 24 transactions | — | 21.4Kas of Nov 2015 | 34.4K | — | 13.0K |
| Prajzner Edward JEVP of Corp. Dev. · 3 transactions | — | 20.9Kas of May 2017 | 20.9K | — | 502 |
| Blum DavidSenior Vice President · 5 transactions | — | 19.4Kas of Jun 2007 | 176.4K | — | 177.0K |
| Kovachev KirilChief Accounting Officer · 8 transactions | — | 16.3K | 10.7K | — | — |
| Flaherty Thomas JDirector · 11 transactions | — | 16.0Kas of May 2009 | 25.9K | 10.4K | 20.3K |
| Knowling Robert E JrDirector · 2 transactions | — | 13.1K | 13.1K | — | — |
| Krieg Ronald EDirector · 4 transactions | — | 8.0Kas of May 2009 | 6.0K | 2.0K | — |
| Richey Victor L JrDirector · 1 transaction | — | 6.4K | 6.4K | — | — |
| Cook Benton LowellVP Controller · 13 transactions | — | 5.0Kas of Nov 2016 | 18.0K | — | 13.0K |
| Murphy Neal EVP and Chief Financial Officer · 1 transaction | — | 0as of Jan 2014 | — | — | 125 |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over all recorded history: -1.07M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.