X0306 4 2023-02-28 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 SVP & CFO Common Stock 2023-02-28 4 F 0 9370 58.56 D 145873 D Common Stock 2023-03-01 4 A 0 21437 0 A 167310 D Common Stock 10371 I By OPC Savings Plan Represents shares of common stock withheld to satisfy tax withholding obligations upon the vesting of previously reported restricted stock units. Award of restricted stock units (RSUs) pursuant to the Issuer's Amended and Restated 2015 Long-Term Incentive Plan. Each RSU represents a contingent right to receive one share of the Issuer's common stock upon vesting. The RSUs will vest in three equal annual installments beginning on February 29, 2024. Based on a plan statement dated February 28, 2023. /s/ Brittany A. Smith, Attorney-in-Fact for Robert L. Peterson 2023-03-02