Exhibit 99.1 News Release Graham Corporation ¨ 20 Florence Avenue ¨ Batavia, NY 14020 IMMEDIATE RELEASE Graham Corporation Reports Fourth Quarter and Full-Year Fiscal 2025 Results BATAVIA, NY, June 9, 2025 – Graham Corporation (NYSE: GHM) ("GHM" or the "Company"), a global leader in the design and manufacture of mission critical fluid, power, heat transfer and vacuum technologies for the Defense, Energy & Process, and Space industries, today reported financial results for the fourth quarter and fiscal year ...