Exhibit 11 W. R. GRACE & CO. AND SUBSIDIARIES WEIGHTED AVERAGE NUMBER OF SHARES AND EARNINGS USED IN PER SHARE COMPUTATIONS (Unaudited) The weighted average number of shares of Common Stock outstanding were as follows (in thousands): 3 Mos. Ended 9 Mos. Ended 9/30/95 - 9/30/94 9/30/95 - 9/30/94 ----------------------- --------------------- Weighted average number of shares of Common Stock outstanding. . . . . . . . . . . . . . . 96,708 93,995 95,330 93,893 Additional dilutive effect of outstanding options (as determined by the application of the treasury stock method). . . . . . . . . . . . . . . . . 2,392 660 2,392 756 ------ ------- ------ ------ Weighted average number of shares of Common Stock outstanding assuming full dilution . . . 99,100 94,655 97,722 94,649 ------ ------ ------ ------ ------ ------ ------ ------ Income/(loss) used in the computation of earnings per share were as follows (dollars in millions, except per share): 3 Mos. Ended 9 Mos. Ended 9/30/95 - 9/30/94 9/30/95 - 9/30/94 ---------------------- --------------------- Net income/(loss). . . . . . . . . . . . . . . $21.7 $76.0 $147.9 $(20.1) Dividends paid on preferred stocks . . . . . . (.1) (.2) (.4) (.4) ----- ----- ------ ------ Income/(loss) used in per share computation of earnings and in per share computation of earnings assuming full dilution . . . . . . $21.6 $75.8 $147.5 $(20.5) ----- ----- ------ ------ ----- ----- ------ ------ Earnings/(loss) per share. . . . . . . . . . . $ .22 $.81 $1.55 $ (.22) Earnings/(loss) per share assuming full dilution $ .22 $.80 $1.51 $ (.22)