Company: OXY-WT
Filing Date: 2025-07-28
Form Type: 424B2
Source: 0001628280-25-036238
Chunk: 21

Company: OCCIDENTAL PETROLEUM CORP /DE/
Filing Date: 2025-07-28
Form: 424B2
Chunk 21
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 STOCK                                      |     |   32 |
| DESCRIPTION OF PREFERRED STOCK                                   |     |   35 |
| DESCRIPTION OF WARRANTS                                          |     |   38 |
| DESCRIPTION OF DEPOSITARY SHARES                                 |     |   39 |
| DESCRIPTION OF STOCK PURCHASE CONTRACTS AND STOCK PURCHASE UNITS |     |   40 |
| DESCRIPTION OF UNITS                                             |     |   41 |
| PLAN OF DISTRIBUTION                                             |     |   42 |
| LEGAL MATTERS                                                    |     |   44 |
| EXPERTS                                                          |     |   44 |

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### ABOUT THIS PROSPECTUS
Unless otherwise stated or the context otherwise requires, the terms “Occidental,” the “Company,” “we,” “us,” and “our” refer to Occidental Petroleum Corporation and its subsidiaries. In the “Description of Senior Debt Securities,” “Description of Subordinated Debt Securities,” “Description of Common Stock,” “Description of Preferred Stock,” “Description of Warrants,” “Description of Depositary Shares,” “Description of Stock Purchase Contracts and Stock Purchase Units” and “Description of Units” sections of this prospectus, however, references to “Occidental,” the “Company,” “we,” “us” and “our” refer only to Occidental Petroleum Corporation and not to any of its subsidiaries. As used in this prospectus, the term “including,” and any variation thereof, means “including without limitation.” Unless the context otherwise requires, the use of the word “or” in this prospectus is not exclusive.

This prospectus is part of a registration statement that we have filed with the SEC using a “shelf” registration process. Using this process, we may offer any combination of the securities described in this prospectus in one or more offerings in amounts to be determined at the time of any offering. This prospectus provides you with a general description of the securities we may offer. Each time we use this prospectus to offer or sell securities, we will provide a prospectus supplement and, if applicable, a pricing supplement that will describe the specific terms of the offering. The prospectus supplement and any pricing supplement may add to, update or change the information contained in this prospectus. Please carefully read this prospectus, the accompanying prospectus supplement and any pricing supplement, in addition to the information contained in the documents we refer to under the heading “Where You Can Find More Information.”

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### WHERE