1 EXHIBIT 11 WESTERN DIGITAL CORPORATION COMPUTATION OF PER SHARE EARNINGS (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS) YEARS ENDED -------------------------------- JUNE JUNE 29, JULY 1, 30, 1996 1995 1994 ------- -------- ------- PRIMARY Net income................................................... $96,894 $123,302 $73,136 ======= ======== ======= Weighted average number of common shares outstanding during the period................................................. 46,279 46,082 39,341 Incremental common shares attributable to exercise of outstanding options, warrants and ESPP contributions....... 1,845 2,116 2,022 ------- -------- ------- Total shares................................................. 48,124 48,198 41,363 ======= ======== ======= Net income per share......................................... $ 2.01 $ 2.56 $ 1.77 ======= ======== ======= FULLY DILUTED Net income................................................... $96,894 $123,302 $73,136 Add back: interest expense, net of income tax effect applicable to convertible subordinated debentures.......... -- 3,594 4,664 ------- -------- ------- $96,894 $126,896 $77,800 ======= ======== ======= Weighted average number of common shares outstanding during the period................................................. 46,279 46,082 39,341 Incremental common shares attributable to exercise of outstanding options, warrants and ESPP contributions....... 2,001 2,125 2,280 Incremental common shares attributable to conversion of convertible subordinated debentures........................ -- 3,213 4,059 ------- -------- ------- Total shares................................................. 48,280 51,420 45,680 ======= ======== ======= Net income per share......................................... $ 2.01 $ 2.47 $ 1.70 ======= ======== =======