X0202 4 2006-01-30 0 0000106040 WESTERN DIGITAL CORP WDC 0001232828 SHAKEEL ARIF C/O WESTERN DIGITAL CORPORATION 20511 LAKE FOREST DRIVE LAKE FOREST CA 92630-7741 1 1 0 0 President and CEO Common Stock 2006-01-30 4 M 0 57500 3.85 A 1637962 D Common Stock 2006-01-30 4 M 0 15000 10.21 A 1652962 D Common Stock 2006-01-30 4 M 0 1000 13.07 A 1653962 D Common Stock 2006-01-30 4 S 0 2900 21.88 D 1651062 D Common Stock 2006-01-30 4 S 0 4800 21.89 D 1646262 D Common Stock 2006-01-30 4 S 0 3500 21.9 D 1642762 D Common Stock 2006-01-30 4 S 0 1600 21.91 D 1641162 D Common Stock 2006-01-30 4 S 0 1000 21.92 D 1640162 D Common Stock 2006-01-30 4 S 0 13500 21.93 D 1626662 D Common Stock 2006-01-30 4 S 0 4700 21.94 D 1621962 D Common Stock 2006-01-30 4 S 0 9000 21.95 D 1612962 D Common Stock 2006-01-30 4 S 0 2200 21.96 D 1610762 D Common Stock 2006-01-30 4 S 0 6800 21.97 D 1603962 D Common Stock 2006-01-30 4 S 0 20000 22 D 1583962 D Common Stock 2006-01-31 4 M 0 20000 10.21 A 1603962 D Common Stock 2006-01-31 4 S 0 10000 21.81 D 1593962 D Common Stock 2006-01-31 4 S 0 10000 21.83 D 1583962 D Common Stock 5030 I by Trust 401(K) Employee Stock Option (right to buy) 3.85 2006-01-30 4 M 0 57500 0 D 2003-03-23 2012-09-23 Common Stock 57500 0 D Employee Stock Option (right to buy) 10.21 2006-01-30 4 M 0 15000 0 D 2006-01-20 2015-01-20 Common Stock 15000 156875 D Employee Stock Option (right to buy) 10.21 2006-01-31 4 M 0 20000 0 D 2006-01-20 2015-01-20 Common Stock 20000 136875 D Employee Stock Option (right to buy) 13.07 2006-01-30 4 M 0 1000 0 D 2004-09-24 2013-09-24 Common Stock 1000 191000 D The option vested 25% six months from the grant date, then in three equal installments on each anniversary of the grant date thereafter. A total of 62,500 shares vested one year from the grant date of 1/20/2005. The remaining shares subject to the option will vest in substantially equal installments at the end of each three-month period until fully vested on 10/20/2007. The option vested 25% one year from the grant date of 9/24/2003, and an additional 6.25% vested each three-month period through 12/24/2005. The remaining shares subject to the option will vest at 6.25% each three-month period until fully vested on 9/24/2007. The reporting owner acquired 732.8971 shares of WDC common stock in an exempt transaction under the issuer's 401(k) plan since his last filing. The reported indirect holdings are based on shares held under the 401(k) plan as of January 30, 2006. By: /s/ Sandra Garcia Attorney-in-Fact For: Arif Shakeel 2006-02-01