X0202 3 2006-10-03 0 0000813347 KOMAG INC /DE/ KOMG 0001230580 YAMASHITA TSUTOMU T 1710 AUTOMATION PARKWAY SAN JOSE CA 95131 0 1 0 0 EVP, CTO Common Stock 20666 D Non-Qualified Stock Option (right to buy) 6.48 2003-10-07 2013-03-17 Common Stock 667 D Non-Qualified Stock Option (right to buy) 13.16 2003-10-07 2013-07-25 Common Stock 375 D Non-Qualified Stock Option (right to buy) 18.85 2005-03-15 2014-03-15 Common Stock 2474 D On 03/17/03, the Reporting Person was granted a 16,000 share option under the Issuer's Amended and Restated 2002 Qualified Stock Plan (the "2002 Plan"), of which 15,333 shares have been exercised. One-fourth (1/4) of the shares subject to such option vest on 10/07/03 and 1/36 of the remaining shares subject to such option vest on the 7th of each month thereafter, subject to the Reporting Person continuing to be a participant under the 2002 Plan through such dates. On 07/25/03, the Reporting Person was granted a 9,000 share option under the 2002 Plan, of which 8,625 shares have been exercised. One-fourth (1/4) of the shares subject to such option vest on 10/07/03 and 1/36 of the remaining shares subject to such option vest on the 7th of each month thereafter, subject to the Reporting Person continuing to be a participant under the 2002 Plan through such dates. On 03/15/04, the Reporting Person was granted a 6,250 share option under the 2002 Plan, of which 3,776 shares have been exercised. One-fourth (1/4) of the shares subject to such option vest on 03/15/05 and 1/36 of the remaining shares subject to such option vest on the 15th of each month thereafter, subject to the Reporting Person continuing to be a participant under the 2002 Plan through such dates. /s/ Jan Schwartz, Attorney-in-fact for Tsutomu Yamshita 2006-10-03