X0508 4 2024-02-07 0 0000797468 OCCIDENTAL PETROLEUM CORP /DE/ OXY 0001808899 Peterson Robert L OCCIDENTAL PETROLEUM CORPORATION 5 GREENWAY PLAZA, SUITE 110 HOUSTON TX 77046 0 1 0 0 Senior Vice President 0 Common Stock 2024-02-07 4 A 0 55140 0 A 222450 D Common Stock 2024-02-07 4 A 0 34283 0 A 256733 D Common Stock 2024-02-07 4 F 0 35256 57.62 D 221477 D Common Stock 10832 I By OPC Savings Plan Represents shares of common stock received upon the vesting of a performance stock unit award granted under the Issuer's Amended and Restated 2015 Long-Term Incentive Plan. Represents shares of common stock withheld to satisfy tax withholding obligations. Based on a plan statement dated February 7, 2024. /s/ Brittany A. Smith, Attorney-in-Fact for Robert L. Peterson 2024-02-09