EXHIBIT 11 OLD KENT FINANCIAL CORPORATION PRIMARY EARNINGS PER SHARE CALCULATION Three Months Ended Sept 30 Nine Months Ended Sept 30 1997 1996 1997 1996 P R I M A R Y Income for primary EPS calculation (net income)...................... $43,475,000 $40,297,000 $137,290,000 $117,092,000 Avg common shares outstanding....... 47,420,000 48,298,802 47,703,113 49,266,251 Common stock equivalents............ 380,000 342,622 369,530 363,735 Shares for primary EPS calculation.. 47,800,000 48,641,424 48,072,643 49,629,986 PRIMARY E.P.S....................... $ 0.91 $ 0.83 $ 2.86 $ 2.36