EXHIBIT 11 OCCIDENTAL PETROLEUM CORPORATION AND SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE FOR THE THREE AND SIX MONTHS ENDED JUNE 30, 2002 AND 2001 (Amounts in millions, except per-share amounts) Three Months Ended Six Months Ended June 30 June 30 ------------------------- ------------------------- 2002 2001 2002 2001 - ----------------------------------------------------- ---------- ---------- ---------- ---------- BASIC EARNINGS PER SHARE Income before extraordinary item and effect of changes in accounting principles $ 240 $ 473 $ 360 $ 984 Effect of repurchase of Trust Preferred Securities -- -- -- -- ---------- ---------- ---------- ---------- Earnings before extraordinary item and effect of changes in accounting principles 240 473 360 984 Extraordinary loss, net -- -- -- (3) Cumulative effect of changes in accounting principles, net -- -- (95) (24) ---------- ---------- ---------- ---------- Earnings applicable to common stock $ 240 $ 473 $ 265 $ 957 ========== ========== ========== ========== Weighted average common shares outstanding 375.8 372.0 375.1 371.1 ========== ========== ========== ========== Basic earnings per share Income before extraordinary item and effect of changes in accounting principles $ .64 $ 1.27 $ .96 $ 2.65 Extraordinary loss, net -- -- -- (.01) Cumulative effect of changes in accounting principles, net -- -- (.25) (.06) ---------- ---------- ---------- ---------- Basic earnings per common share $ .64 $ 1.27 $ .71 $ 2.58 ========== ========== ========== ========== DILUTED EARNINGS PER SHARE Earnings before extraordinary item and effect of changes in accounting principles $ 240 $ 473 $ 360 $ 984 Extraordinary loss, net -- -- -- (3) Cumulative effect of changes in accounting principles, net -- -- (95) (24) ---------- ---------- ---------- ---------- Earnings applicable to common stock $ 240 $ 473 $ 265 $ 957 ========== ========== ========== ========== Weighted average common shares outstanding 375.8 372.0 375.1 371.1 Dilutive effect of exercise of options outstanding 5.7 2.7 5.2 1.7 ---------- ---------- ---------- ---------- 381.5 374.7 380.3 372.8 ========== ========== ========== ========== Diluted earnings per share Income before extraordinary item and effect of changes in accounting principles $ .63 $ 1.26 $ .95 $ 2.64 Extraordinary loss, net -- -- -- (.01) Cumulative effect of changes in accounting principles, net -- -- (.25) (.06) ---------- ---------- ---------- ---------- Diluted earnings per common share $ .63 $ 1.26 $ .70 $ 2.57 ===================================================== ========== ========== ========== ========== EXHIBIT 11 (CONTINUED) OCCIDENTAL PETROLEUM CORPORATION AND SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE FOR THE THREE AND SIX MONTHS ENDED JUNE 30, 2002 AND 2001 (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 Six Months Ended June 30 June 30 --------------------------------------------- --------------------------------------------- 2002 2001 2002 2001 -------------------- -------------------- -------------------- -------------------- STOCK OPTIONS Number of shares .006 .021 .021 .021 Price range per share $29.438 $29.063 -- $29.438 $29.063 -- $29.438 $29.063 -- $29.438 Expiration range 12/01/07 12/01/07 -- 04/29/08 12/01/07 -- 04/29/08 12/01/07 -- 04/29/08 - ------------------------- -------------------- -------------------- -------------------- --------------------