Exhibit 99.1 News Release Graham Corporation t 20 Florence Avenue t Batavia, NY 14020 IMMEDIATE RELEASE GRAHAM CORPORATION REPORTS EXPANDED MARGINS ON SALES GROWTH OF 18% TO A RECORD $185.5 MILLION FOR FISCAL 2024 • FOURTH QUARTER 2024 RESULTS DEMONSTRATED ONGOING PROGRESS IN DRIVING GROWTH AND EXPANDING MARGINS • REVENUE GREW 14% TO $49.1 MILLION DRIVEN BY STRENGTH IN DEFENSE AND AFTERMARKET • GROSS MARGIN EXPANDED 930 BASIS POINTS TO 25.9% AND ACHIEVED OPERATING MARGIN OF 3.1% COMPARED WITH AN OPERATING L ...