Jason Dezwirek - Jul 30, 2025 Form 4 Insider Report for CECO ENVIRONMENTAL CORP (CECO)

Role: Director
Signature: /s/ Kiril Kovachev as Attorney-in-Fact for Jason DeZwirek
Stock symbol: CECO
Transactions as of: Jul 30, 2025
Transactions value $: -$4,298,327
Form type: 4
Date filed: 8/1/2025, 11:31 AM
Previous filing: Jun 5, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
DEZWIREK JASON	Director	5080 SPECTRUM DRIVE, SUITE 800E, ADDISON	/s/ Kiril Kovachev as Attorney-in-Fact for Jason DeZwirek	2025-08-01	0000946589

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CECO	Common Stock	Sale	-$1.88M	-43.7K	-14.56%	$43.09	256K	Jul 30, 2025	By 0to100 Inc.	F1
transaction	CECO	Common Stock	Sale	-$931K	-22K	-8.58%	$42.34	234K	Jul 30, 2025	By 0to100 Inc.	F2
transaction	CECO	Common Stock	Sale	-$179K	-4.33K	-1.85%	$41.36	230K	Jul 30, 2025	By 0to100 Inc.	F3
transaction	CECO	Common Stock	Sale	-$859K	-19.6K	-8.53%	$43.79	210K	Jul 31, 2025	By 0to100 Inc.	F4
transaction	CECO	Common Stock	Sale	-$447K	-10.4K	-4.94%	$43.07	200K	Jul 31, 2025	By 0to100 Inc.	F5
holding	CECO	Common Stock						1.23M	Jul 30, 2025	Direct
holding	CECO	Common Stock						2.77M	Jul 30, 2025	By Icarus Investment Corp.	F6

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Price reflects the weighted average sale price for multiple transactions that ranged from $42.65 to $43.63 per share. The Reporting Person undertakes to provide, upon request by the Commission Staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F2	Price reflects the weighted average sale price for multiple transactions that ranged from $41.68 to $42.63 per share. The Reporting Person undertakes to provide, upon request by the Commission Staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F3	Price reflects the weighted average sale price for multiple transactions that ranged from $40.69 to $41.61 per share. The Reporting Person undertakes to provide, upon request by the Commission Staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F4	Price reflects the weighted average sale price for multiple transactions that ranged from $43.34 to $44.34 per share. The Reporting Person undertakes to provide, upon request by the Commission Staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F5	Price reflects the weighted average sale price for multiple transactions that ranged from $42.74 to $43.30 per share. The Reporting Person undertakes to provide, upon request by the Commission Staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F6	Reporting person is an officer of Icarus Investment Corp. and disclaims beneficial ownership except to the extent of his pecuniary interest therein.