X0306 4 2020-05-08 1 0000797468 OCCIDENTAL PETROLEUM CORP /DE/ OXY 0001715126 Brown Oscar K OCCIDENTAL PETROLEUM CORPORATION 5 GREENWAY PLAZA, SUITE 110 HOUSTON TX 77046 0 1 0 0 Former Senior Vice President Common Stock 2020-05-08 4 S 0 30000 14.85 D 98905 D Common Stock 1228 I By OPC Savings Plan The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.73 to $14.96, 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. Total shares of common stock beneficially owned reflects the effect of other transactions that have occurred since the date of the reporting person's last Form 4. Based on a plan statement dated May 8, 2020. /s/ Jenarae N. Garland, Attorney-in-Fact for Oscar K. Brown 2020-05-11