Exhibit 11 MOBILE MINI, INC. STATEMENT RE: COMPUTATION OF EARNINGS PER SHARE Three Months Ended March 31, 1998 1997 ------------ ------------- BASIC: Common shares outstanding, beginning of period 6,799,524 6,739,324 Effect of weighting shares: Weighted common shares issued 574,629 -- Common stock to be issued 66,475 -- ---------- ---------- Weighted average number of common shares outstanding 7,440,628 6,739,324 ========== ========== Net income available for common stock $ 533,177 $ 201,762 ---------- ---------- Earnings per share $ 0.07 $ 0.03 ========== ========== DILUTED: Common shares outstanding, beginning of period 6,799,524 6,739,324 Effect of weighting shares: Weighted common shares issued 574,629 -- Employee stock options 241,931 79 Convertible warrants 242,951 -- IPO stock purchase options 46,294 -- Common stock to be issued 66,475 -- ---------- ---------- Weighted average number of common and common equivalent shares outstanding 7,971,804 6,739,403 ========== ========== Net income available for common stock $ 533,177 $ 201,762 ---------- ---------- Earnings per share $ 0.07 $ 0.03 ========== ==========