Exhibit 99 Tennant Company Reports Record 2023 Fourth-Quarter and Full-Year Results Delivers Robust Growth of 13.9% in Net Sales and 65.2% in Net Income Achieves Strong Net Income to Free Cash Flow Conversion Introduces Full-Year Guidance for 2024 MINNEAPOLIS, MN (Feb. 22, 2024)—Tennant Company (“Tennant” or the “Company”) (NYSE: TNC) today reported its fourth-quarter and full-year financial results for 2023. Three Months Ended Twelve Months Ended (In millions, except per share data) December 31, December 3 ...