X0306 4 2017-11-21 0001102934 CABOT MICROELECTRONICS CORP CCMP 0001559386 Polezoes Lisa A C/O CABOT MICROELECTRONICS CORPORATION 870 COMMONS DRIVE AURORA IL 60504 1 VP, Human Resources Common Stock 2017-11-21 4 M 0 5745 27.94 A 9693.843 D Common Stock 2017-11-21 4 S 0 5745 102.0805 D 3948.843 D Stock Options (Right to Buy) 27.94 2017-11-21 4 M 0 5745 0 D 2012-12-01 2021-12-01 Common Stock 5745 11490 D With original vesting schedule of 25% quarterly per year beginning on the first anniversary of grant date December 1, 2011. /s/ H. Carol Bernstein (Power of Attorney) 2017-11-22