X0306 4 2020-03-26 0 0000797468 OCCIDENTAL PETROLEUM CORP /DE/ OXY 0001777012 Dillon Kenneth OCCIDENTAL PETROLEUM CORPORATION 5 GREENWAY PLAZA, SUITE 110 HOUSTON TX 77046 0 1 0 0 Senior Vice President Common Stock 2020-03-26 4 P 0 10000 13.42 A 129461 D Common Stock 15019 I By OPC Savings Plan The price reported in Column 4 is a weighted average price. 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 purchased at each separate price. Based on a plan statement dated March 25, 2020. /s/ Jenarae N. Garland, Attorney-in-Fact for Kenneth Dillon 2020-03-26