X0306 4 2017-09-05 0 0000925528 HUDSON TECHNOLOGIES INC /NY HDSN 0001478411 Krishnamurti Nat C/O INVENTIV HEALTH, INC. 500 ATRIUM DRIVE SOMERSET NJ 08873 0 1 0 0 Vice President, CFO common stock 2017-09-05 4 A 0 3000 0 A 11782 D The reported transaction represents a 3,000 common stock grant pursuant to the employment package of the reporting person, such shares set aside and issued under the Company's 2008 Stock Incentive Plan and approved by the Company's Board of Directors. Nat Krishnamurti 2017-09-07