Company: OXY-WT
Filing Date: 2025-07-28
Form Type: 424B2
Source: 0001628280-25-036238
Chunk: 18

Company: OCCIDENTAL PETROLEUM CORP /DE/
Filing Date: 2025-07-28
Form: 424B2
Chunk 18
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 public accounting firm, incorporated by reference herein, and upon the authority of said firm as experts in accounting and auditing.

The consolidated financial statements of CrownRock, L.P. and its subsidiaries (“CrownRock”) as of and for the year ended December 31, 2023 incorporated by reference in this prospectus supplement have been so incorporated in reliance upon the report of BDO USA, P.C., independent auditors, given on the authority of said firm as experts in accounting and auditing.

Certain information with respect to the oil and gas reserves associated with Occidental’s oil and gas properties is confirmed in the process review letter of Ryder Scott Company, L.P., independent petroleum engineering consultants, and has been incorporated by reference herein, upon the authority of said firm as experts with respect to the matters covered by such process review letter and in giving such process review letter.

Certain information with respect to the oil and gas reserves associated with CrownRock’s oil and gas properties is confirmed in the report of Cawley, Gillespie & Associates, Inc., independent petroleum engineering consultants, with respect to estimates of reserves and future net revenues of CrownRock as of December 31, 2023, and has been incorporated by reference herein, upon the authority of said firm as experts with respect to the matters covered by such report and in giving such report.

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### WHERE YOU CAN FIND MORE INFORMATION
We are subject to the information reporting requirements of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). In accordance with the Exchange Act, we file annual, quarterly and current reports, proxy statements and other information with the SEC. Our SEC file number is 001-09210. The SEC maintains a website that contains reports, proxy statements and other information about issuers, like us, that file electronically with the SEC. The address of that site is www.sec.gov. Such reports, proxy statements and other information filed by us can also be read through the Investor Relations section of our website at www.oxy.com. Information on our website does not constitute part of, and is not incorporated by reference in, this prospectus supplement or the accompanying prospectus and should not be relied upon in connection with making any investment decision with respect to our Common Stock.

The SEC allows us to “incorporate by reference” the information that we file with the SEC. This permits us to disclose important information to you by referencing these filed documents. Any information referenced this way is considered part of this prospectus supplement