Exhibit 11 MOBILE MINI, INC. STATEMENT RE: COMPUTATION OF EARNINGS PER SHARE Three Months Ended September 30, Nine Months Ended September 30, 1997 1996 1997 1996 -------------------------------- ------------------------------- PRIMARY: Common Shares outstanding, beginning of year 6,739,324 6,739,324 6,739,324 4,835,000 Effect of weighting shares: Employee stock options 89,781 -- 26,653 -- Conversion of Series A preferred stock -- -- -- 1,902,010 ---------- ---------- ---------- ---------- Weighted average number of common shares and common share equivalents outstanding 6,829,105 6,739,324 6,765,977 6,737,010 ========== ========== ========== ========== Net Income $ 662,974 $ 389,096 $1,385,493 $ 187,489 ========== ========== ========== ========== Net Income per common share and common share equivalent (Note 1) $ 0.10 $ 0.06 $ 0.20 $ 0.03 ========== ========== ========== ========== FULLY DILUTED: Common Shares outstanding, beginning of year 6,739,324 6,739,324 6,739,324 4,835,000 Effect of weighting shares: Employee stock options 99,131 -- 82,508 -- Conversion of Series A preferred stock -- -- -- 1,902,010 ---------- ---------- ---------- ---------- Weighted average number of common shares and common share equivalents outstanding 6,838,455 6,739,324 6,821,832 6,737,010 ========== ========== ========== ========== Net Income $ 662,974 $ 389,096 $1,385,493 $ 187,489 ========== ========== ========== ========== Net Income per common share and common share equivalent (Note 1) $ 0.10 $ 0.06 $ 0.20 $ 0.03 ========== ========== ========== ========== Note 1 - Net income per common share and common share equivalent calculated after effect of an extraordinary item recorded during the quarter ended March 31, 1996. 15