EXHIBIT 11 DEKALB Genetics Corporation STATEMENT RE COMPUTATION OF PER SHARE EARNINGS years ended August 31, 1997, 1996 and 1995 (Dollars in thousands except per share amounts) PRIMARY EARNINGS PER SHARE: 1997 1996 1995 Average shares outstanding* 34,250,522 32,515,743 30,981,014 Net average additional shares outstanding assuming dilutive options exercised and proceeds used to purchase treasury stock at average market price* 1,509,946 1,060,655 572,873 Average number of common and common equivalent shares outstanding 35,760,468 33,576,398 31,553,887 Net earnings for primary earnings per share computation $ 28,781 $ 17,025 $ 10,758 Primary earnings per share* $ 0.80 $ 0.51 $ 0.34 *Earnings per share and all share amounts have been adjusted to reflect the two- for-one split of the Common Stock to holders of record July 25, 1997 and the three-for-one split of the Common Stock to holders of