EXHIBIT 11 OCCIDENTAL PETROLEUM CORPORATION AND SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE FOR THE THREE AND NINE MONTHS ENDED SEPTEMBER 30, 2000 AND 1999 (Amounts in millions, except per-share amounts) Three Months Ended Nine Months Ended September 30 September 30 --------------------------- --------------------------- 2000 1999 2000 1999 - ------------------------------------------------------- ------------ ------------ ------------ ------------ BASIC EARNINGS PER SHARE Income before extraordinary items and effect of changes in accounting principles $ 401 $ 126 $ 1,236 $ 81 Effect of repurchase of Trust Preferred Securities -- -- 1 -- Preferred stock dividends -- -- -- (7) ------------ ------------ ------------ ------------ Earnings before extraordinary items and effect of changes in accounting principles applicable to common stock 401 126 1,237 74 Extraordinary gain (loss), net 1 -- 1 (3) Cumulative effect of changes in accounting principles, net -- -- -- (13) ------------ ------------ ------------ ------------ Earnings applicable to common stock $ 402 $ 126 $ 1,238 $ 58 ============ ============ ============ ============ Weighted average common shares outstanding 369.2 357.6 368.7 351.3 ============ ============ ============ ============ Basic earnings per share Income before extraordinary items and effect of $ 1.09 $ .35 $ 3.36 $ .22 changes in accounting principles Extraordinary gain (loss), net -- -- -- (.01) Cumulative effect of changes in accounting principles, net -- -- -- (.04) ------------ ------------ ------------ ------------ Basic earnings per common share $ 1.09 $ .35 $ 3.36 $ .17 ============ ============ ============ ============ DILUTED EARNINGS PER SHARE Earnings before extraordinary items and effect of changes in accounting principles applicable to common stock $ 401 $ 126 $ 1,237 $ 74 Dividends applicable to dilutive preferred stock -- -- -- 7 ------------ ------------ ------------ ------------ 401 126 1,237 81 Extraordinary gain (loss), net 1 -- 1 (3) Cumulative effect of changes in accounting principles, net -- -- -- (13) ------------ ------------ ------------ ------------ Earnings applicable to common stock $ 402 $ 126 $ 1,238 $ 65 ============ ============ ============ ============ Weighted average common shares outstanding 369.2 357.6 368.7 351.3 Dilutive effect of exercise of options outstanding .3 .1 .2 .1 ------------ ------------ ------------ ------------ 369.5 357.7 368.9 351.4 ============ ============ ============ ============ Diluted earnings per share Income before extraordinary items and effect of $ 1.09 $ .35 $ 3.36 $ .22 changes in accounting principles Extraordinary gain (loss), net -- -- -- (.01) Cumulative effect of changes in accounting principles, net -- -- -- (.04) ------------ ------------ ------------ ------------ Diluted earnings per common share $ 1.09 $ .35 $ 3.36 $ .17 ======================================================= ============ ============ ============ ============ EXHIBIT 11 (CONTINUED) OCCIDENTAL PETROLEUM CORPORATION AND SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE FOR THE THREE AND NINE MONTHS ENDED SEPTEMBER 30, 2000 AND 1999 (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 ------------------------------------------- ------------------------------------------- 2000 1999 2000 1999 -------------------- -------------------- -------------------- -------------------- STOCK OPTIONS Number of shares 5.6 4.6 5.6 5.0 Price range per share $22.000 -- $29.438 $22.000 -- $29.625 $21.250 -- $29.438 $19.875 -- $29.625 Expiration range 4/28/03 -- 11/10/09 1/14/00 -- 7/8/08 4/28/03 -- 11/10/09 1/14/00 -- 7/8/08 CONVERTIBLE PREFERRED STOCK $3.00 Number of shares -- -- -- -- Dividends paid -- -- -- 7.2 - --------------------------- -------------------- -------------------- -------------------- --------------------