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 9/30/94 - 9/30/93 9/30/94 - 9/30/93 ------------------- -------------------- Weighted average number of shares of Common Stock outstanding. . . . . . . . . . . . . . . . . . . 93,995 92,295 93,893 90,829 Conversion of convertible debt obligations . . . . . . -- 65 -- 65 Additional dilutive effect of outstanding options (as determined by the application of the treasury stock method). . . . . . . . . . . . . . . . . . . . . 660 513 756 544 ------ ------ ------ ------ Weighted average number of shares of Common Stock outstanding assuming full dilution . . . . . . . 94,655 92,873 94,649 91,438 ------ ------ ------ ------ ------ ------ ------ ------ Income/(loss) used in the computation of earnings per share were as follows (in millions, except per share): 3 Mos. Ended 9 Mos. Ended 9/30/94 - 9/30/93 9/30/94 - 9/30/93 ------------------ ---------------------- Net income/(loss). . . . . . . . . . . . . . . . . . . $76.0 $(236.4) $(20.1) $(259.2) Dividends paid on preferred stocks . . . . . . . . . . (.2) (.2) (.4) (.4) ----- -------- ------- -------- Income/(loss) used in per share computation of earnings . . . . . . . . . . . . . . . . . . . . . . . 75.8 (236.6) (20.5) (259.6) Interest, net of tax, on convertible debt obligations. . . . . . . . . . . . . . . . . . . . . . -- -- -- -- ----- -------- ------- -------- Income/(loss) used in per share computation of earnings assuming full dilution. . . . . . . . . . . . $75.8 $(236.6) $(20.5) $(259.6) ----- -------- ------- -------- ----- -------- ------- -------- Income/(loss) per share. . . . . . . . . . . . . . . . $ .81 $ (2.56) $ (.22) $ (2.86) Income/(loss) per share assuming full dilution . . . . $ .80 $ (2.55) $ (.22) $ (2.84)