EXHIBIT 11 ADE CORPORATION STATEMENT REGARDING COMPUTATION OF NET INCOME PER SHARE THREE MONTHS ENDED NINE MONTHS ENDED JANUARY 31, JANUARY 31, -------------------- -------------------- 1998 1997 1998 1997 --------- --------- --------- --------- (UNAUDITED) (UNAUDITED) Net income................................................................ $ 4,317 $ 3,819 $ 8,830 $ 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 8,629 8,836 --------- --------- --------- --------- --------- --------- --------- --------- Basic net income per share................................................ $ 0.39 $ 0.45 $ 0.87 $ 1.12 --------- --------- --------- --------- --------- --------- --------- --------- Diluted net income per share.............................................. $ 0.38 $ 0.43 $ 0.83 $ 1.07 --------- --------- --------- --------- --------- --------- --------- --------- 18