- 27 - Exhibit (11) OWENS CORNING AND SUBSIDIARIES COMPUTATION OF PER SHARE EARNINGS Quarter Six Months Ended Ended June 30, June 30, 1997 1996 1997 1996 (In millions of dollars, except share data) Primary: Net income (loss) $ 63 $ (473) $ 105 $(434) Weighted average number of shares outstanding (thousands) 53,283 51,538 52,980 51,512 Weighted average common equivalent shares (thousands): Deferred awards 14 - 14 - Stock options using weighted average market price 543 - 625 - Primary weighted average number of common shares outstanding and common equivalent shares (thousands) 53,840 51,538 53,619 51,512 Primary per share amount $ 1.17 $(9.19) $ 1.96 $ (8.43) Fully Diluted: Net income (loss) $ 65 $ (473) $ 109 $ (434) Weighted average number of shares outstanding (thousands) 53,283 51,538 52,980 51,512 Weighted average common equivalent shares (thousands): Deferred awards 14 - 14 - Stock options using the higher of average market price or market price at end of period 611 - 677 - Shares from assumed conversion of preferred securities 4,566 - 4,566 - Fully diluted weighted average number of common shares outstanding and common equivalent shares (thousands) 58,474 51,538 58,237 51,512 Fully diluted per share amount $ 1.11 $ (9.19) $ 1.87 $ (8.43)