X0508 4/A 2025-12-05 2025-12-09 1 0000925528 HUDSON TECHNOLOGIES INC /NY HDSN 0001250706 COLEMAN BRIAN F 0 0 0 1 Former Director 0 Common Stock 2025-12-05 4 S 0 484616 7.404 D 426968 D Beneficial ownership following reported transaction should have been reported as 426,968, not 1,944,312. This Form 4A is only to correct the reported amount to direct ownership of Common Stock of the Issuer following the reported transaction on December 5, 2025, which should have been 426,968, not 1,944,312. /s/ Brian F. Coleman 2025-12-15