EXHIBIT 11 CHEMFIRST INC. WEIGHTED AVERAGE NUMBER OF SHARES AND EARNINGS USED IN PER SHARE COMPUTATION (In thousands, except per share amounts) The weighted average number of shares of Common Stock outstanding is as follows: 12 Months Ended 6/30/96 6/30/95 6/30/94 ------- ------- ------- Weighted average number of shares of Common Stock outstanding 20,615 20,299 19,963 Additional dilutive effect of outstanding stock options and convertible debentures (as determined by application of the treasury stock method) 365 333 163 ------- ------- ------- Weighted average number of shares of Common Stock outstanding assuming full dilution 20,980 20,632 20,126 ======= ======= ======= Income used in the computation of earnings per common share was as follows: 12 Months Ended 6/30/96 6/30/95 6/30/94 ------- ------- ------- Net earnings $35,220 $57,794 $21,863 ======= ======= ======= Earnings per common share $ 1.68 $ 2.80 $ 1.09 CHEMFIRST INC. WEIGHTED AVERAGE NUMBER OF SHARES AND EARNINGS USED IN PER SHARE COMPUTATION (Unaudited) (In thousands, except per share amounts) The weighted average number of shares of Common Stock outstanding is as follows: 3 Months Ended 9/30/96 9/30/95 ------- ------- Weighted average number of shares of Common Stock outstanding 20,614 20,530 Additional dilutive effect of outstanding stock options and convertible debentures (as determined by application of the treasury stock method) 280 518 ------- ------- Weighted average number of shares of Common Stock outstanding assuming full dilution 20,894 21,048 ======= ======= Income used in the computation of earnings per common share was as follows: 3 Months Ended 9/30/96 9/30/95 ------- ------- Net earnings $12,789 $12,480 ======= ======= Earnings per common share $ 0.61 $ 0.59