BURLINGTON RESOURCES INC. EARNINGS PER SHARE EXHIBIT 11.1 (UNAUDITED) THIRD QUARTER -------------------------------------------------------------- 1997 1996 --------------------------- ---------------------------- Earnings Shares Earnings Shares --------------------------- ---------------------------- (Dollars in Millions, Except per Share Amounts) Primary earnings per common share Net earnings available for common stock and weighted average number of common shares outstanding ....................................... $ 59 123,802,283 $ 59 125,230,379 Stock options assumed exercised - net ....................... - 502,227 - 497,096 ----------- ----------- ----------- ----------- Total net earnings and primary common shares ................ $ 59 124,304,510 $ 59 125,727,475 =========== =========== =========== =========== Primary earnings per common share ........................... $ .47 $ .47 =========== =========== Fully diluted earnings per common share Net earnings available for common stock and weighted average number of common shares outstanding ....................................... $ 59 123,802,283 $ 59 125,230,379 Stock options assumed exercised - net ....................... - 601,409 - 701,850 ----------- ----------- ----------- ----------- Total net earnings and fully diluted common shares .......... $ 59 124,403,692 $ 59 125,932,229 =========== =========== =========== =========== Fully diluted earnings per common share ..................... $ .47 $ .47 =========== =========== NINE MONTHS -------------------------------------------------------------- 1997 1996 --------------------------- ---------------------------- Earnings Shares Earnings Shares --------------------------- ---------------------------- (Dollars in Millions, Except per Share Amounts) Primary earnings per common share Net earnings available for common stock and weighted average number of common shares outstanding ....................................... $ 249 124,192,065 $ 145 125,819,192 Stock options assumed exercised - net ....................... - 525,041 - 516,514 ----------- ----------- ----------- ----------- Total net earnings and primary common shares ................ $ 249 124,717,106 $ 145 126,335,706 =========== =========== =========== =========== Primary earnings per common share ........................... $ 1.99 $ 1.15 =========== =========== Fully diluted earnings per common share Net earnings available for common stock and weighted average number of common shares outstanding ....................................... $ 249 124,192,065 $ 145 125,819,192 Stock options assumed exercised - net ....................... - 715,393 - 712,835 ----------- ----------- ----------- ----------- Total net earnings and fully diluted common shares .......... $ 249 124,907,458 $ 145 126,532,027 =========== =========== =========== =========== Fully diluted earnings per common share ..................... $ 1.99 $ 1.15 =========== =========== 14