EXHIBIT 11 OCCIDENTAL PETROLEUM CORPORATION AND SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE FOR THE THREE AND NINE MONTHS ENDED SEPTEMBER 30, 1999 AND 1998 (Amounts in millions, except per-share amounts) Three Months Ended Nine Months Ended September 30 September 30 ---------------------------- ---------------------------- 1999 1998 1999 1998 - - ------------------------------------------------------ ------------ ------------ ------------ ------------ BASIC EARNINGS PER SHARE Income from continuing operations $ 126.2 $ 38.4 $ 81.4 $ 362.6 Preferred stock dividends -- (4) (7.2) (12.9) ------------ ------------ ------------ ------------ Earnings from continuing operations Applicable to common stock 126.2 34.4 74.2 349.7 Discontinued operations, net -- -- -- 38.4 Extraordinary loss, net -- -- (2.6) -- Cumulative effect of changes in accounting principles, net -- -- (13.4) -- ------------ ------------ ------------ ------------ Earnings applicable to common stock $ 126.2 $ 34.4 $ 58.2 $ 388.1 ============ ============ ============ ============ Weighted average common shares outstanding 357.6 350 351.3 351.2 ============ ============ ============ ============ Basic earnings per share Income from continuing operations $ .35 $ .10 $ .22 $ 1.00 Discontinued operations, net -- -- -- .11 Extraordinary loss, net -- -- (.01) -- Cumulative effect of changes in accounting principles, net -- -- (.04) -- ------------ ------------ ------------ ------------ Basic earnings per common share $ .35 $ .10 $ .17 $ 1.11 ============ ============ ============ ============ DILUTED EARNINGS PER SHARE Earnings from continuing operations Applicable to common stock $ 126.2 $ 34.4 $ 74.2 $ 349.7 Dividends applicable to dilutive preferred stock -- -- 7.2 12.9 ------------ ------------ ------------ ------------ 126.2 34.4 81.4 362.6 Discontinued operations, net -- -- -- 38.4 Extraordinary loss, net -- -- (2.6) -- Cumulative effect of changes in accounting principles, net -- -- (13.4) -- ------------ ------------ ------------ ------------ Earnings applicable to common stock $ 126.2 $ 34.4 $ 65.4 $ 401.0 ============ ============ ============ ============ Weighted average common shares outstanding 357.6 350 351.3 351.2 Dilutive effect of exercise of options outstanding .1 .2 .1 .5 Dilutive effect of convertible preferred stock -- -- -- 15.2 ------------ ------------ ------------ ------------ 357.7 350.2 351.4 366.9 ============ ============ ============ ============ Diluted earnings per share Income from continuing operations $ .35 $ .10 $ .22 $ .99 Discontinued operations, net -- -- -- .10 Extraordinary loss, net -- -- (.01) -- Cumulative effect of changes in accounting principles, net -- -- (.04) -- ------------ ------------ ------------ ------------ Diluted earnings per common share $ .35 $ .10 $ .17 $ 1.09 ====================================================== ============ ============ ============ ============ EXHIBIT 11 (CONTINUED) OCCIDENTAL PETROLEUM CORPORATION AND SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE FOR THE THREE AND NINE MONTHS ENDED SEPTEMBER 30, 1999 AND 1998 (Amounts in millions, except per-share amounts) The following items were not included in the computation of diluted earnings per share because their effect was antidilutive: Three Months Ended Nine Months Ended September 30 September 30 ---------------------------------------- ---------------------------------------- 1999 1998 1999 1998 ------------------- ------------------- ------------------- ------------------- STOCK OPTIONS Number of shares 4.6 2.8 5.0 .2 Price range per share $22.000 -- $29.625 $23.125 -- $29.625 $19.875 -- $29.625 $26.000 -- $29.625 Expiration range 1/14/00 -- 7/8/08 8/20/99 -- 1/14/00 1/14/00 -- 7/8/08 8/20/99 -- 1/14/00 CONVERTIBLE PREFERRED STOCK $3.00 Number of shares -- 5.4 -- 5.4 Dividends paid -- $4.0 $7.2 $12.9 - - ------------------------- ------------------- ------------------- ------------------- -------------------