X0306 4 2016-12-05 0001102934 CABOT MICROELECTRONICS CORP CCMP 0001223693 JOHNSON WILLIAM S C/O CABOT MICROELECTRONICS CORPORATION 870 COMMONS DRIVE AURORA IL 60504 1 Executive Vice President, CFO Common Stock 2016-12-05 4 A 0 9700 0 A 88926.065 D Common Stock 2016-12-05 4 F 0 1120 60.27 D 87806.065 D Common Stock 2016-12-05 4 F 0 972 60.27 D 86834.065 D Common Stock 2016-12-05 4 F 0 812 60.27 D 86022.065 D Common Stock 2016-12-05 4 F 0 960 60.27 D 85062.065 D Common Stock 0 I Trust Stock Options (Right to Buy) 60.27 2016-12-05 4 A 0 17300 60.27 A 2017-12-05 2026-12-05 Common Stock 17300 17300 D 2016 (FY17) Restricted Stock Unit Award Vesting Schedule: 25% 12/05/2017, 25% 12/05/2018, 25% 12/05/2019, 25% 12/05/2020. Withheld to cover for tax purposes as per terms of Omnibus Incentive Plan. 2016 (FY17) Non-Qualified Stock Option Grant Vesting Schedule: 25% 12/05/2017, 25% 12/05/2018, 25% 12/05/2019, 25% 12/05/2020. /s/ H. Carol Bernstein (Power of Attorney) 2016-12-06