EXHIBIT 11.1 STATEMENT RE: COMPUTATION OF PER SHARE EARNINGS Mid Am, Inc. The weighted average number of common shares outstanding for basic and diluted earnings per share computations were as follows: Dollars in thousands, Year Ended December 31, except per share data 1997 1996 1995 Numerator: Net income $30,881 $25,992 $24,967 Less: Preferred stock dividends (605) (2,407) (2,751) Net income available to common shareholders (Basic) 30,276 23,585 22,216 Effect of Dilutive Securities: Convertible preferred stock 605 2,407 2,751 Net income (Diluted) $30,881 $25,992 $24,967 Denominator: Weighted average common shares outstanding (Basic) 23,836,000 22,734,000 23,070,000 Exercise of options 279,000 221,000 97,000 Convertible preferred stock 1,112,000 3,599,000 4,074,000 Weighted average common shares outstanding (Diluted) 25,227,000 26,554,000 27,241,000 Earnings Per Share: Basic $1.27 $1.04 $0.96 Diluted $1.22 $0.98 $0.92