Exhibit 11 MAHASKA INVESTMENT COMPANY AND SUBSIDIARIES STATEMENT RE: COMPUTATION OF PER SHARE EARNINGS 2001 2000 1999 ---------- --------- --------- Earnings per Share Information: Weighted average number of shares outstanding during the year............ 3,951,271 4,052,163 3,864,108 Weighted average number of shares outstanding during the year including all dilutive potential shares 3,986,156 4,056,921 3,968,826 Net earnings............................. $4,355,664 4,000,633 2,222,483 Earnings per share--basic................ $ 1.10 0.99 0.58 Earnings per share--diluted.............. $ 1.09 0.99 0.56