X0202 4 2006-08-03 0 0000813347 KOMAG INC /DE/ KOMG 0001340094 HARRIS TIMOTHY DAVID 1710 AUTOMATION PARKWAY SAN JOSE CA 95131 0 1 0 0 COO Non-Qualified Stock Option (right to buy) 38.65 2006-08-03 4 A 0 100000 0.00 A 2007-08-03 2016-08-03 Common Stock 100000 100000 D Stock Purchase Right (right to buy) 0.01 2006-08-03 4 A 0 50000 0.00 A 2006-08-03 2006-09-01 Common Stock 50000 50000 D 25,000 shares subject to the Option shall vest on 08/03/2006 and 1/36 of the remaining 75,000 shares subject to the Option shall vest on the 3rd 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. One-third (1/3) of the securities acquired shall be released from the Company's Repurchase Option on August 3, 2007, one-third (1/3) of the securities acquired shall be released from the Company's Repurchase Option on August 3, 2008, and one-third (1/3) of the securities acquired shall be released from the Company's Repurchase Option on August 3, 2009, provided that the Reporting Person does not cease to be a participant of the Komag Incorporated Amended and Restated 2002 Qualified Stock Plan on such dates. /s/ Jan Schwartz, Attorney-in-fact for Timothy D. Harris 2006-08-04