Exhibit 99.1 CONTACT: Vince Arnone President and CEO (630) 845-4500 Devin Sullivan Managing Director The Equity Group Inc. dsullivan@theequitygroup.com FOR IMMEDIATE RELEASE FUEL TECH REPORTS 2025 THIRD QUARTER FINANCIAL RESULTS WARRENVILLE, Ill., November 4, 2025 – Fuel Tech, Inc. (NASDAQ: FTEK), a technology company using advanced engineering processes to provide emissions control systems and water treatment technologies in utility and industrial applications, today reported financial results for the thir ...