1 Exhibit 11 SPEEDFAM INTERNATIONAL, INC. COMPUTATION OF NET EARNINGS PER SHARE THREE MONTHS ENDED AUGUST 31, 1997 AND 1996 (dollars and shares in thousands, except per share data) Three Months Ended August 31, August 31, 1997 1996 ---------- ---------- Net Earnings $ 5,557 $ 4,038 ======= ======= Weighted average shares: Common shares outstanding 13,398 10,534 Common equivalent shares issuable upon exercise of employee stock options using the treasury stock method 844 743 ------- ------- Shares used in net earnings per share 14,242 11,277 ======= ======= Net earnings per share $ 0.39 $ 0.36 ======= ======= 15