Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing. On October 2, 2026, CECO Environmental Corp. (the “Company”), acting pursuant to authorization from its Board of Directors (the “Board”), notified the Nasdaq Global Select Market (“Nasdaq”) of its intention to voluntarily withdraw the primary listing of its common stock, par value $0.01 per share (the “Common Stock”), from Nasdaq and transfer the primary listing to the Texas Stock Exchange LLC…

Results of Operations and Financial Condition. On August 10, 2026, CECO Environmental Corp. (the “Company”) issued a press release announcing its financial results for the second quarter ended June 30, 2026. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated herein by reference. The information in this Item 2.02, including the exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchan…

Completion of Acquisition or Disposition of Assets On June 1, 2026 (the “Closing Date”), the Company consummated the previously announced merger with Thermon in accordance with the terms of the Merger Agreement. Pursuant to the Merger Agreement: (i) at the effective time of the First Merger, Merger Sub Inc. merged with and into Thermon, with Thermon continuing as a wholly-owned subsidiary of the Company and the surviving corporation of the First Merger; and (ii) immediately following the Firs…

Director — Marcus J. George, Victor L. Richey: Two new directors were appointed as part of a merger agreement.

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant In connection with the consummation of the Mergers, the Company incurred additional indebtedness consisting of (i) $235.0 million borrowed under the delayed draw term loan facility established pursuant to Amendment No. 1 to the Fourth Amended and Restated Credit Agreement, dated as of March 30, 2026 (the “Delayed Draw Term Loan Facility”), and (ii) approximately $290 million borro…

The filing is about the approval of a new equity plan, not a management change.

Results of Operations and Financial Condition. On April 28, 2026, CECO Environmental Corp. (the “Company”) issued a press release announcing its financial results for the first quarter ended March 31, 2026. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated herein by reference. The information in this Item 2.02, including the exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchang…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth under

above is incorporated by reference herein. No Offer or Solicitation This communication is for informational purposes only and is not intended to and shall not constitute an offer to buy or sell or the solicitation of an offer to buy or sell any securities, or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any suc…

Entry into a Material Definitive Agreement. On February 23, 2026, CECO Environmental Corp., a Delaware corporation (the “ Company ”), Longhorn Merger Sub, Inc., a Delaware corporation and direct wholly owned subsidiary of the Company (“ Merger Sub Inc. ”), Longhorn Merger Sub LLC, a Delaware limited liability company and direct wholly owned subsidiary of the Company (“ Merger Sub LLC ”), and Thermon Group Holdings, Inc., a Delaware corporation (“ Thermon ”), entered into an Agreement and Plan…

Results of Operations and Financial Condition. On February 24, 2026, CECO Environmental Corp. (the “Company”) issued a press release announcing its financial results for the fourth quarter and year ended December 31, 2025. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated herein by reference. The information in this Item 2.02, including the exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amend…

Entry into a Definitive Material Agreement. On January 30, 2026 (the “Effective Date”), CECO Environmental Corp. (the “Company”) entered into the Fourth Amended and Restated Credit Agreement (the “Credit Agreement”), among the Company, its subsidiaries from time to time party thereto, the lenders from time to time party thereto (the “Lenders”), and Bank of America, N.A., as administrative agent (the “Agent”), which amends and restates in its entirety the Company’s Third Amended and Restated C…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth under

Results of Operations and Financial Condition. On October 28, 2025, CECO Environmental Corp. issued a press release announcing its financial results for the third quarter ended September 30, 2025. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated herein by reference. The information in this Item 2.02, including the exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), o…

Results of Operations and Financial Condition. On July 29, 2025, CECO Environmental Corp. issued a press release announcing its financial results for the second quarter ended June 30, 2025. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated herein by reference. The information in this Item 2.02, including the exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or incor…

Senior Vice President and Chief Administrative and Legal Officer — Lynn Watkins-Asiyanbi: Ms. Watkins-Asiyanbi is departing from her role with a severance package and no named successor.

Results of Operations and Financial Condition. On April 29, 2025, CECO Environmental Corp. issued a press release announcing its financial results for the first quarter ended March 31, 2025. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated herein by reference. The information in this Item 2.02, including the exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or inco…

Completion of Acquisition or Disposition of Assets. The information disclosed under

Entry into a Material Definitive Agreement. On March 31, 2025, CECO Environmental Corp. (the "Company") through its subsidiary Met-Pro Technologies LLC executed a membership interest purchase agreement (the "Agreement") with May River Capital through its special purpose entity Tusk Industrial OpCo Acquisition LLC (the "Purchaser") and simultaneously closed the sale of its Fluid Handling business, also known as its Global Pump Solutions business. The Global Pump Solutions business consists of…

Change in Registrant’s Certifying Accountant. (a) Dismissal of Independent Registered Public Accounting Firm On February 28, 2025, the Audit Committee of the Board of Directors (the “Audit Committee”) of CECO Environmental Corp. (the “Company”) selected Deloitte & Touche LLP (“Deloitte”) to serve as the Company’s new independent registered public accounting firm for the fiscal year ending December 31, 2025, and notified BDO USA, P.C. (“BDO”) of its dismissal as the Company’s independent regis…

Results of Operations and Financial Condition. On February 25, 2025, CECO Environmental Corp. (the “Company”) issued a press release announcing its financial results for the fourth quarter and year ended December 31, 2024. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated herein by reference. The information in this Item 2.02, including the exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amend…

Results of Operations and Financial Condition. On January 16, 2025, CECO Environmental Corp. (the “Company”) issued a press release announcing its preliminary financial results for the fourth quarter and full year ended December 31, 2024. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated herein by reference. The information in this Item 2.02, including the exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act o…

Other Events. On October 29, 2024, the Company and PFIE issued a joint press release announcing the execution of the Merger Agreement. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K. Cautionary Notes Regarding Forward Looking Statements This Current Report on Form 8-K includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, both as amended, which are i…

Entry into a Definitive Material Agreement. Agreement and Plan of Merger On October 28, 2024, CECO Environmental Corp., a Delaware corporation (the “Company”), Combustion Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of the Company (“Purchaser”), and Profire Energy, Inc., a Nevada corporation (“PFIE”), entered into an Agreement and Plan of Merger (the “Merger Agreement”). Capitalized terms used herein and not otherwise defined have the meaning set forth in the Merger Ag…

Results of Operations and Financial Condition. On October 29, 2024, CECO Environmental Corp. (the “Company”) issued a press release announcing its financial results for the third quarter ended September 30, 2024. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated herein by reference. The information in this Item 2.02, including the exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “E…