X0306 4 2022-06-01 0 0000797468 OCCIDENTAL PETROLEUM CORP /DE/ OXY 0001643753 Champion Christopher O OCCIDENTAL PETROLEUM CORPORATION 5 GREENWAY PLAZA, SUITE 110 HOUSTON TX 77046 0 1 0 0 VP, CAO and Controller Common Stock 2022-06-01 4 M 0 95129 40.03 A 138432 D Common Stock 2022-06-01 4 M 0 11465 25.39 A 149897 D Common Stock 2022-06-01 4 S 0 106594 70.44 D 43303 D Common Stock 2022-06-01 4 S 0 5000 70.37 D 38303 D Common Stock 2022-06-01 5 G 0 5396 0 D 32907 D Common Stock 1950 I By OPC Savings Plan Stock Option (Right to buy) 40.03 2022-06-01 4 M 0 95129 0 D 2030-02-14 Common Stock 95129 47564 D Stock Option (Right to buy) 25.39 2022-06-01 4 M 0 11465 0 D 2031-02-12 Common Stock 11465 22929 D Warrants (Right to buy) 22.00 2022-06-01 4 S 0 2097 47.27 D 2020-08-31 2027-08-03 Common Stock 2097 0 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $70.10 to $70.72, inclusive. The reporting person undertakes to provide to Occidental Petroleum Corporation, any security holder of Occidental Petroleum Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $70.17 to $70.62, inclusive. The reporting person undertakes to provide to Occidental Petroleum Corporation, any security holder of Occidental Petroleum Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. Based on a plan statement dated June 1, 2022. One-third of the 2020 option, representing a right to purchase a total of 142,693 shares of common stock, vested on each of February 28, 2021 and February 28, 2022, and the remaining unvested portion will vest on February 28, 2023. Anti-dilution adjustments were made to the exercise price and the number of shares of common stock underlying the option in connection with the warrant distribution on August 3, 2020. One-third of the 2021 option, representing a right to purchase a total of 34,394 shares of common stock, vested on February 28, 2022, and the remaining unvested portion will vest ratably on February 28, 2023 and 2024. The price reported in Column 8 is a weighted average price. These warrants were sold in multiple transactions at prices ranging from $47.05 to $47.43, inclusive. The reporting person undertakes to provide to Occidental Petroleum Corporation, any security holder of Occidental Petroleum Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of warrants sold at each separate price within the range set forth above. /s/ Brittany A. Smith, Attorney-in-Fact for Christopher O. Champion 2022-06-03