X0609 4 2026-06-08 0000716314 GRAHAM CORP GHM 0001917893 Thome Christopher J. false C/O GRAHAM CORPORATION 20 FLORENCE AVENUE BATAVIA NY 14020 0 1 0 0 VP-Finance; CFO 0 Common Stock 2026-06-08 4 A 0 8619 0 A 39181 D Common Stock 2026-06-08 4 F 0 3193 95.34 D 35988 D Restricted Stock Units 0 Common Stock 1644 1644 D Restricted Stock Units 0 Common Stock 2200 2200 D Restricted Stock Units 0 Common Stock 1408 1408 D These shares were awarded to Mr. Thome upon the vesting of performance-based restricted stock units ("PSUs") granted to him under the 2020 Graham Corporation Equity Incentive Plan in a transaction exempt under Rule 16b-3. The shares underlying this award vested after three years based on the Company's achievement on certain pre-determined performance measures over the eligible three-year period that ended on 3/31/2026. Shares withheld to cover tax withholding obligations upon the vesting of PSUs. These restricted stock units convert into common stock on a one-for-one basis ("RSUs"). Two-thirds of the original grant of these RSUs vested in substantially equal installments on each of 6/4/2025 and 6/4/2026, and except as otherwise provided in the award notice, the balance vests on 6/4/2027. One-third of the original grant of these RSUs vested on 6/2/2026, and except as otherwise provided in the award notice, the balance vests in substantially equal installments on 6/2/2027 and 6/2/2028. These RSUs vest one-third on each of 6/1/2027, 6/1/2028 and 6/1/2029, except as otherwise provided in the award notice. /s/ Christina McLeod, Attorney-in-Fact for Christopher J. Thome 2026-06-10