Co announced that it is extending its previously announced tender offer for all outstanding shares of Komag (KOMG), until 7:00 a.m., New York City time, on Wed., Sept. 5, 2007. The tender offer is being extended because the required waiting period under the antitrust laws of the People's Republic of China is not expected to expire until the close of business, Beijing time, on Wed., Sept. 5, 2007. WDC expects to complete the tender offer promptly following the expiration of this waiting period. WD filed the required notification with the Chinese authorities on July 25, 2007. As previously announced, the waiting period under the U.S. antitrust laws has already expired.









