X0306 4 2014-11-10 0001102934 CABOT MICROELECTRONICS CORP CCMP 0001436878 Damashek Yumiko C/O CABOT MICROELECTRONICS CORPORATION 870 COMMONS DRIVE AURORA IL 60504 1 VP, Japan and Operations Asia Common Stock 2014-11-10 4 M 0 4390 21.77 A 26232.209 D Common Stock 2014-11-10 4 S 0 4390 47.7825 D 21842.209 D Common Stock 2014-11-10 4 M 0 4203 25.79 A 26045.209 D Common Stock 2014-11-10 4 S 0 4203 47.7825 D 21842.209 D Common Stock 2014-11-11 4 M 0 3 25.79 A 21845.209 D Common Stock 2014-11-11 4 S 0 3 47.70 D 21842.209 D Stock Options (Right to Buy) 21.77 2014-11-10 4 M 0 4390 0 D 2007-12-01 2016-12-01 Common Stock 4390 0 D Stock Options (Right to Buy) 25.79 2014-11-10 4 M 0 4203 0 D 2008-11-30 2017-11-30 Common Stock 4203 3 D Stock Options (Right to Buy) 25.79 2014-11-11 4 M 0 3 0 D 2008-11-30 2017-11-30 Common Stock 3 0 D Sale to cover exercise price of, and taxes related to, exercise of stock options. Vesting Schedule: 25% 12/1/07 25% 12/1/08 25% 12/1/09 25% 12/1/10 Vesting Schedule: 25% 11/30/08 25% 11/30/09 25% 11/30/10 25% 11/30/11 /s/ H. Carol Bernstein (Power of Attorney) 2014-11-12