1 EXHIBIT 11 WESTERN DIGITAL CORPORATION COMPUTATION OF PER SHARE EARNINGS (IN THOUSANDS, EXCEPT PER SHARE DATA) THREE MONTHS ENDED NINE MONTHS ENDED ---------------------- ---------------------- APRIL 1, MARCH 26, APRIL 1, MARCH 26, 1995 1994 1995 1994 -------- --------- -------- --------- PRIMARY Net income . . . . . . . . . . . . . . $19,650 $28,448 $96,922 $35,837 ======= ======= ======= ======= Weighted average number of common shares outstanding during the period . . 46,716 41,575 45,765 37,525 Common stock equivalents related to dilutive options and warrants . . . . . 1,870 2,905 2,079 1,982 ------- ------- ------- ------- Total shares . . . . . . . . . . . 48,586 44,480 47,844 39,507 ======= ======= ======= ======= Net income per share . . . . . . . . . $ .40 $ .64 $ 2.03 $ .91 ======= ======= ======= ======= FULLY DILUTED Net income . . . . . . . . . . . . . . $19,650 $28,448 $96,922 $35,837 Add back: interest expense, net of income tax effect, applicable to convertible subordinated debentures . . 813 1,168 3,036 3,504 ------- ------- ------- ------- $20,463 $29,616 $99,958 $39,341 ======= ======= ======= ======= Weighed average number of common shares outstanding during the period . . 46,716 41,575 45,765 37,525 Common stock equivalents related to dilutive options and warrants . . . . . 1,870 3,214 2,080 3,318 Shares issued upon proforma conversion of convertible subordinated debentures . . . . . . . . . . . . . . 2,800 4,074 3,519 4,074 ------- ------- ------- ------- Total shares . . . . . . . . . . . 51,386 48,863 51,364 44,917 ======= ======= ======= ======= Net income per share . . . . . . . . . $ .40 $ .61 $ 1.95 $ .88 ======= ======= ======= =======