Amendment No. 18 to Schedule 13D for CECO ENVIRONMENTAL CORP

This filing, Amendment No. 18 to Schedule 13D, concerns CECO ENVIRONMENTAL CORP and relates to shares of Common Stock. The Reporting Persons, including Jason DeZwirek, Icarus Investment Corp., and 0to100 Inc., have entered into a merger agreement and a voting agreement concerning the company. The merger involves CECO ENVIRONMENTAL CORP, Longhorn Merger Sub Inc., Longhorn Merger Sub LLC, and Thermon Group Holdings, Inc. The voting agreement restricts the transfer of shares and mandates voting in favor of the merger. Jason DeZwirek holds 4,198,111 shares, Icarus Investment Corp. holds 2,770,546 shares, and 0to100 Inc. holds 200,000 shares. The Reporting Persons may consider future transactions, including purchasing or selling shares, and engaging in communications with various parties regarding the company. This amendment supplements previous filings and remains in effect, with certain terms of the merger and voting agreements being detailed.