X0202 4 2007-02-15 0 0000813347 KOMAG INC /DE/ KOMG 0001376805 CASEY EDWARD JAMES 1710 AUTOMATION PARKWAY SAN JOSE CA 95131 0 1 0 0 VP, COO Common Stock 2007-02-15 4 F 0 773 32.10 D 29893 D Non-Qualified Stock Option (right to buy) 32.10 2007-02-15 4 A 0 12614 0.00 A 2008-02-15 2017-02-15 Common Stock 12614 12614 D Stock Purchase Right (right to buy) 0.01 2007-02-15 4 A 0 4672 0.00 A 2007-02-15 2007-03-16 Common Stock 4672 4672 D 4,205 shares subject to the Option shall vest on 02/15/2008 and 1/24 of the remaining 8,409 shares subject to the Option shall vest on the 15th of each month thereafter, subject to the Optionee continuing to be a Participant of Komag Incorporated Amended and Restated 2002 Qualified Stock Plan on through dates. One-third (1/3) of the securities acquired shall be released from the Company's Repurchase Option on February 15, 2008, one-third (1/3) of the securities acquired shall be released from the Company's Repurchase Option on February 15, 2009, and one-third (1/3) of the securities acquired shall be released from the Company's Repurchase Option on February 15, 2010, provided that the Reporting Person does not cease to be a participant of the Komag Incorporated Amended and Restated 2002 Qualified Stock Plan through such dates. /s/ Jan Schwartz, Attorney-in-fact for Edward Casey 2007-02-20