EXHIBIT 11 OCCIDENTAL PETROLEUM CORPORATION AND SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE FOR THE THREE AND SIX MONTHS ENDED JUNE 30, 2004 AND 2003 (Amounts in thousands, except per-share amounts) Three Months Ended Six Months Ended June 30 June 30 ---------------------------- ---------------------------- 2004 2003 2004 2003 ======================================================== ============ ============ ============ ============ BASIC EARNINGS PER SHARE Income after taxes $ 581,048 $ 373,833 $ 1,068,075 $ 767,438 Effect of repurchase of Trust Preferred Securities -- (1) -- (19) ------------ ------------ ------------ ------------ Income from continuing operations 581,048 373,832 1,068,075 767,419 Discontinued operations, net -- -- -- -- Cumulative effect of changes in accounting principles, net -- -- -- (68,430) ------------ ------------ ------------ ------------ Earnings applicable to common stock $ 581,048 $ 373,832 $ 1,068,075 $ 698,989 ============ ============ ============ ============ Basic shares Weighted average common shares outstanding 391,494 381,343 390,440 379,876 Issued, unvested restricted stock (34) (167) (34) (167) Vested, unissued restricted stock 665 197 665 197 Deferred shares 1,803 1,191 1,695 972 ------------ ------------ ------------ ------------ Basic shares outstanding 393,928 382,564 392,766 380,878 ============ ============ ============ ============ Basic earnings per share Income from continuing operations $ 1.48 $ 0.98 $ 2.72 $ 2.02 Cumulative effect of changes in accounting principles, net -- -- -- (0.18) ------------ ------------ ------------ ------------ Basic earnings per common share $ 1.48 $ 0.98 $ 2.72 $ 1.84 ============ ============ ============ ============ DILUTED EARNINGS PER SHARE Earnings applicable to common stock $ 581,048 $ 373,832 $ 1,068,075 $ 698,989 ============ ============ ============ ============ Diluted shares Basic shares outstanding 393,928 382,564 392,766 380,878 Dilutive effect of exercise of options outstanding 3,862 3,274 4,176 3,176 Issued, unvested restricted stock 34 167 34 167 Deferred, restricted stock 1,054 726 1,054 726 ------------ ------------ ------------ ------------ Diluted shares 398,878 386,731 398,030 384,947 ============ ============ ============ ============ Diluted earnings per share Income from continuing operations $ 1.46 $ 0.97 $ 2.68 $ 1.99 Cumulative effect of changes in accounting principles, net -- -- -- (0.18) ------------ ------------ ------------ ------------ Diluted earnings per common share $ 1.46 $ 0.97 $ 2.68 $ 1.81 ======================================================== ============ ============ ============ ============ There were no antidulutive options included in the computation of diluted earnings per share for all periods presented.