Form 4 Filing for CECO ENVIRONMENTAL CORP

This Form 4 filing details a transaction by Kiril Kovachev, Chief Accounting Officer of CECO ENVIRONMENTAL CORP. On July 5, 2026, Mr. Kovachev disposed of 460 shares of Common Stock at a price of $82.15 per share. This disposition was a result of shares withheld to cover tax liabilities related to the vesting of restricted stock units, as indicated by footnote F1. Following this transaction, Mr. Kovachev holds 15,801 shares of Common Stock, with his ownership nature indicated as direct.