Executive Change

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 14, 2023 CECO ENVIRONMENTAL CORP. (Exact Name of registrant as specified in its charter) Delaware 000-7099 13-2566064 (State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.) 14651 North Dallas Parkway , Suite 500 Dallas , Texas 75254 (Address of principal executive offices) (Zip Code) Registrant’s telephone number, including area code: ( 214 ) 357-6181 Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol Name of each exchange on which registered Common Stock, par value $0.01 per share CECO The NASDAQ Stock Market LLC Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act . ☐         5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. CECO Environmental Corp. (“CECO” or the “Company”) announced today that Ramesh Nuggihalli, its Chief Operating Officer, will cease serving as the Company’s Chief Operating Officer, effective August 20, 2023, and will be leaving CECO that same date (the “Effective Date”). The Company expects that Mr. Nuggihalli will stay through the Effective Date to facilitate a smooth and orderly transition of his responsibilities and will continue to be compensated in accordance with existing arrangements until the Effective Date. In connection with his departure from the Company, it is anticipated that the Company and Mr. Nuggihalli will enter into a written separation agreement and release providing for certain severance payments and benefits to Mr. Nuggihalli and a general release of claims in favor of the Company.           Signatures Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.     Date: July 14, 2023   CECO Environmental Corp.             By: /s/ Joycelynn Watkins-Asiyanbi       Joycelynn Watkins-Asiyanbi       SVP, Chief Administrative and Legal Officer and Corporate Secretary