Exhibit 11 ADE CORPORATION Statement Regarding Computation of Net Income Per Share Three months ended Nine months ended January 31, Jauary 31, ----------------- ------------------ 1998 1997 1998 1997 ------- ------ -------- ------ (unaudited) (unaudited) Net income .......................................................... $ 3,786 $3,819 $ 8,299 $9,484 ------- ------ -------- ------ ------- ------ -------- ------ Shares used in computation: a. Weighted average common stock outstanding used in computation of basic net income per share ........... 11,096 8,516 10,184 8,470 b. Dilutive effect of stock options outstanding: ................ 351 355 445 366 ------- ------ -------- ------ c. Shares used in computation of diluted net income per share ........................................ 11,447 8,871 10,629 8,836 ------- ------ -------- ------ ------- ------ -------- ------ Basic net income per share .......................................... $ 0.34 $ 0.45 $ 0.81 $ 1.12 ------- ------ -------- ------ ------- ------ -------- ------ Diluted net income per share ........................................ $ 0.33 $ 0.43 $ 0.78 $ 1.07 ------- ------ -------- ------ ------- ------ -------- ------ 19