Page 27 of 32 Exhibit 11 MAHASKA INVESTMENT COMPANY AND SUBSIDIARIES STATEMENT RE: COMPUTATION OF PER SHARE EARNINGS Earnings per Share Information: 2000 1999 1998 - ----------------------------------------------- ----------- --------- --------- Weighted average number of shares outstanding during the year ................. 4,052,163 3,864,108 3,660,070 Weighted average number of shares outstanding during the year including all dilutive potential shares...... 4,056,921 3,968,826 3,842,151 Net earnings .................................. $ 4,000,633 2,222,483 4,622,749 Earnings per share - basic .................... $ 0.99 0.58 1.26 Earnings per share - diluted .................. $ 0.99 0.56 1.20