EXHIBIT 11 STERICYCLE, INC. AND SUBSIDIARIES STATEMENT RE: COMPUTATION OF PER SHARE EARNINGS FOR THE THREE MONTHS ENDED MARCH 31, -------------------------- 1998 1997 ----------- ---------- (UNAUDITED) Weighted average common shares outstanding - basic earnings per share 10,480,399 10,001,163 Common stock issuable upon assumed conversion of stock options and warrants 679,241 515,942 ---------- ---------- Adjusted weighted average common shares outstanding - diluted earnings per share 11,159,640 10,517,105 ---------- ---------- ---------- ---------- Net income (in thousands) $ 780 $ 102 ---------- ---------- ---------- ---------- Net income per share - basic and diluted $ 0.07 $ 0.01 ---------- ---------- ---------- ----------