Exhibit 99.1 Second Quarter 2024 Earnings Considerations Occidental Petroleum Corporation ("Occidental") is providing the following summary of earnings considerations that management believes will impact results for the second quarter of 2024. The summary is intended only to provide information regarding current estimates of these factors. It is not comprehensive of all results for and changes that have occurred in the second quarter of 2024 and is not an estimate of the second quarter of 2024 earnings for ...