X0202 4 2005-11-21 0 0000813347 KOMAG INC /DE/ KOMG 0001229793 BRAHE PAUL A 123 SECOND STREET SAUSALITO CA 94965 1 0 0 0 Common Stock 2005-11-21 4 M 0 7708 6.48 A 13708 D Common Stock 2005-11-21 4 M 0 2292 13.16 A 16000 D Common Stock 2005-11-21 4 S 0 400 30.51 D 15600 D Common Stock 2005-11-21 4 S 0 350 30.511 D 15250 D Common Stock 2005-11-21 4 S 0 345 30.521 D 14905 D Common Stock 2005-11-21 4 S 0 600 30.541 D 14305 D Common Stock 2005-11-21 4 S 0 2200 30.60 D 12105 D Common Stock 2005-11-21 4 S 0 300 30.601 D 11805 D Common Stock 2005-11-21 4 S 0 200 30.62 D 11605 D Common Stock 2005-11-21 4 S 0 750 30.651 D 10855 D Common Stock 2005-11-21 4 S 0 100 30.72 D 10755 D Common Stock 2005-11-21 4 S 0 300 30.721 D 10455 D Common Stock 2005-11-21 4 S 0 350 30.731 D 10105 D Common Stock 2005-11-21 4 S 0 700 30.79 D 9405 D Common Stock 2005-11-21 4 S 0 100 30.80 D 9305 D Common Stock 2005-11-21 4 S 0 330 30.801 D 8975 D Common Stock 2005-11-21 4 S 0 200 30.81 D 8775 D Common Stock 2005-11-21 4 S 0 300 30.811 D 8475 D Common Stock 2005-11-21 4 S 0 600 30.851 D 7875 D Common Stock 2005-11-21 4 S 0 625 30.891 D 7250 D Common Stock 2005-11-21 4 S 0 300 31.051 D 6950 D Common Stock 2005-11-21 4 S 0 200 31.06 D 6750 D Common Stock 2005-11-21 4 S 0 400 31.10 D 6350 D Common Stock 2005-11-21 4 S 0 350 31.101 D 6000 D Non-Qualified Stock Option (right to buy) 6.48 2005-11-21 4 M 0 7708 0.00 D 2013-03-17 Common Stock 7708 2292 D Non-Qualified Stock Option (right to buy) 13.16 2005-11-21 4 M 0 2292 0.00 D 2013-07-25 Common Stock 2292 2708 D This transaction was executed pursuant to a 10b5-1 plan. The Reporting Person exercised 7,708 shares of the 10,000 share option granted on 03/17/2003, of which 2,500 shares subject to the Option shall vest on 10/07/2003 and 1/36 of the remaining 7,500 shares subject to the Option shall vest on the 7th of each month thereafter, subject to the Optionee continuing to be a Participant of Komag Incorporated Amended and Restated 2002 Qualified Stock Plan on such dates. The Reporting Person exercised 2,292 shares of the 5,000 share option granted on 07/25/2003, of which 1,250 shares subject to the Option shall vest on 10/07/2003 and 1/36 of the remaining 3,750 shares subject to the Option shall vest on the 7th of each month thereafter, subject to the Optionee continuing to be a Participant of Komag Incorporated Amended and Restated 2002 Qualified Stock Plan on such dates. /s/ Jan Schwartz, Attorney-in-fact for Paul A. Brahe 2005-11-22