X0306 4 2012-11-30 0001102934 CABOT MICROELECTRONICS CORP CCMP 0001201094 NOGLOWS WILLIAM P C/O CABOT MICROELECTRONICS CORPORATION 870 COMMONS DRIVE AURORA IL 60504 1 1 Chairman, President & CEO Common Stock 2012-11-30 4 M 0 57472 16.00 A 175496.975 D Common Stock 2012-11-30 4 S 0 57472 32.5126 D 118024.975 D Common Stock 2012-12-03 4 M 0 14719 16.00 A 132743.975 D Common Stock 2012-12-03 4 S 0 14719 32.6469 D 118024.975 D Common Stock 2012-12-03 4 M 0 29377 16.00 A 147401.975 D Common Stock 2012-12-03 4 S 0 29377 32.6499 D 118024.975 D Stock Options (Right to Buy) 16.00 2012-11-30 4 M 0 57472 0 D 2009-12-01 2018-12-01 Common Stock 57472 44096 D Stock Options (Right to Buy) 16.00 2012-12-03 4 M 0 14719 0 D 2009-12-01 2018-12-01 Common Stock 14719 29377 D Stock Options (Right to Buy) 16.00 2012-12-03 4 M 0 29377 0 D 2009-12-01 2018-12-01 Common Stock 29377 0 D 2008 Stock Option Grant Award Vesting Schedule: 25% 12/1/2009, 25% 12/1/2010, 25% 12/1/2011, 25% 12/1/2012 /s/ H. Carol Bernstein (Power of Attorney) 2012-12-03