Exhibit 11 Statement of computation of earnings per share. 153 Statements re: Computation of Earnings Per Share Brenton Banks, Inc. December 31, 1993 1992 1991 1990 Net income $14,249,970 $12,953,094 $11,659,427 $10,338,585 Average common shares outstanding 5,232,530 5,186,902 5,171,675 5,162,827 Average shares under long-term stock compensation plan 46,510 1,895 0 0 Average common equivalent shares outstanding 5,279,040 5,188,797 5,171,675 5,162,827 Earnings per share 2.70 2.50 2.25 2.00 154