X0306 4 2018-08-08 0 0000815094 ABIOMED INC ABMD 0001666158 Van Gorder Chris C/O ABIOMED, INC 22 CHERRY HILL DR DANVERS MA 01923 1 0 0 0 Common Stock, $.01 par value 2018-08-08 4 A 0 531 0 A 6985 D Common Stock, $.01 par value 2018-08-08 4 F 0 646 376.01 D 6339 D Represents shares underlying the grant of restricted stock units that are to be settled in common stock upon vesting. The restricted stock units will vest in full on the earlier of: (a) August 8, 2019; or (b) the date of the Issuer's next annual meeting of stockholders. Transaction represents shares of common stock withheld solely for the payment of withholding tax liability associated with the vesting of awards of restricted stock units in accordance with the time periods set forth in such awards. /s/ Stephen C. McEvoy (by power of attorney) 2018-08-10