1 EXHIBIT 11 WESTERN DIGITAL CORPORATION COMPUTATION OF PER SHARE EARNINGS (IN THOUSANDS, EXCEPT PER SHARE DATA) THREE-MONTH PERIOD ENDED NINE-MONTH PERIOD ENDED ------------------------ ----------------------- MAR. 29, MAR. 30, MAR. 29, MAR. 30, 1997 1996 1997 1996 -------- -------- -------- -------- PRIMARY Net income ........................... $ 82,595 $ 19,438 $179,702 $ 64,158 ======== ======== ======== ======== Weighted average number of common shares outstanding during the period . 43,606 44,895 43,775 47,137 Incremental common shares attributable to exercise of outstanding options ... 3,411 1,697 3,125 1,753 -------- -------- -------- -------- Total shares ......................... 47,017 46,592 46,900 48,890 ======== ======== ======== ======== Net income per share ................. $ 1.76 $ .42 $ 3.83 $ 1.31 ======== ======== ======== ======== FULLY DILUTED Net income ........................... $ 82,595 $ 19,438 $179,702 $ 64,158 ======== ======== ======== ======== Weighted average number of common shares outstanding during the period . 43,606 44,895 43,775 47,137 Incremental common shares attributable to exercise of outstanding options ... 3,412 1,815 3,353 1,877 -------- -------- -------- -------- Total shares ......................... 47,018 46,710 47,128 49,014 ======== ======== ======== ======== Net income per share ................. $ 1.76 $ .42 $ 3.81 $ 1.31 ======== ======== ======== ========