X0306 4 2020-04-04 1 0000021510 COHERENT INC COHR 0001234301 AMBROSEO JOHN 5100 PATRICK HENRY DRIVE SANTA CLARA CA 95054 1 1 0 0 Former Pres, CEO, Director Common Stock 2020-04-04 4 J 0 788 0.00 A 186777 I Family Trust Common Stock 2020-04-04 4 F 0 418 93.220 D 10145 D Common Stock 2020-04-05 4 A 0 2146 0.00 A 12291 D Reflects transfer of 788 shares acquired pursuant to vesting of restricted stock units on April 4, 2020 and transferred to Family Trust. Represents shares withheld to satisfy minimum tax withholding obligations for released restricted stock units. On April 5, 2020 the Reporting Person was granted 2,146 Restricted Stock Units which will vest on July 4, 2020. The Compensation and HR Committee determined to make an automatic grant on the first day of each fiscal quarter on which Mr. Ambroseo holds his current position, with a vest date of the last day of such fiscal quarter in an amount approximately equal to the same value as the grant reported here. Includes 12,291 Restricted Stock Units. /s/ Rhonda Fassbender, pursuant to Power of Attorney 2020-04-07