EXHIBIT 11 WEST ONE BANCORP COMPUTATION OF PER SHARE EARNINGS Dollars in thousands, except per share, for the year ended December 31, 1993 1992 1991 Primary earnings per share: Weighted average number of shares 32,803,044 29,923,980 27,819,458 Common stock equivalents computed under the treasury stock method using average market price. 488,938 419,416 296,640 Total 33,291,982 30,343,396 28,116,098 Fully diluted earnings per share: Weighted average number of shares 32,803,044 29,923,980 27,819,458 Common stock equivalents computed under the treasury stock method using the greater of ending or average market price. 505,788 514,844 319,560 Other potentially dilutive securities 2,687,450 2,687,450 1,340,044 TOTAL 35,996,282 33,126,274 29,479,062 Net income $83,187 $63,372 $41,199 Interest expense (net of tax) incurred for other potentially dilutive securities $ 2,317 $ 2,353 $ 1,170 Earnings per share: Primary $ 2.50 $ 2.09 $ 1.47 Fully diluted 2.38 1.98 1.44