Exhibit (11) OWENS-CORNING FIBERGLAS CORPORATION AND SUBSIDIARIES COMPUTATION OF PER SHARE EARNINGS FOR THE YEARS ENDED DECEMBER 31, 1993, 1992 AND 1991 Primary: - -------- 1993 1992 1991 -------- -------- -------- (In millions of dollars, except share data) Net income (loss) $ 131 $ 73 $ (742) ======== ======== ======== Weighted average number of shares outstanding (thousands) 42,734 41,973 40,924 Weighted average common equivalent shares (thousands): Deferred awards 264 617 - Stock options using weighted average market price 595 423 - -------- -------- -------- Primary weighted average number of common shares outstanding and common equivalent shares (thousands) 43,593 43,013 40,924 ======== ======== ======== Primary per share amount (1) $ 3.00 $ 1.70 $ (18.13) ======== ======== ======== Fully Diluted: - ------------- Net income (loss) $ 139 $ 82 $ (742) ======== ======== ======== Weighted average number of shares outstanding (thousands) 42,734 41,973 40,924 Weighted average common equivalent shares (thousands): Deferred awards 265 617 - Stock options using the higher of average market price or market price at end of period 613 456 - Shares from assumed conversion of debt 5,798 5,798 - ------- -------- -------- Fully diluted weighted average number of common shares outstanding and common equivalent shares (thousands) 49,410 48,844 40,924 ======== ======== ======== Fully diluted per share amount (1) $ 2.81 $ 1.67 $ (18.13) ======== ======== ======== (1) For the year ended December 31, 1991, the deferred awards, stock options and shares from assumed conversion of debt are anti-dilutive in the calculation of fully diluted earnings per share, so they are excluded from the calculation.