As of November 10, 2026, Occidental Petroleum Corp. is a publicly traded company (NYSE: OXY); its largest reported holder is Dodge & Cox, with 7.5% on Schedule 13G/A of May 14, 2026, then Vanguard (5.51%) (Schedule 13G/A, May 14, 2026).
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Is Occidental Petroleum Corp. a real, registered company?
- Occidental Petroleum Corp files with the SEC under CIK 797468 (its SEC filings).
- Its shares are listed under the ticker OXY on NYSE (also OXY-WT) (SEC company record).
- Incorporated in Delaware; business address in Houston, Texas, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under OCCIDENTAL PETROLEUM CORP in our court records and SEC 8-K records (as of 2026-11-10).
- Leadership changes: the latest reported is Vicki Hollub, President and Chief Executive Officer (Form 8-K filed 2026-05-04). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names BlackRock (filed 2026-07-29).
Who are Occidental Petroleum Corp.'s owners and officers?
Occidental Petroleum Corp.: incorporated in Delaware; business address in Houston, Texas; industry Crude Petroleum & Natural Gas (Schedule 13G, 2026-07-29).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G, 2026-07-29 | Blackrock, Inc. | 5.2% |
| Schedule 13G/A, 2026-05-14 | Dodge & Cox | 7.5% |
| Schedule 13G, 2026-04-30 | Vanguard Capital Management | 5.51% |
| Schedule 13G/A, 2026-03-27 | The Vanguard Group | 0% |
| Schedule 13G/A, 2025-08-14 | Warren E. Buffett | 32.7% |
Questions about who owns Occidental Petroleum Corp.
Who owns Occidental Petroleum Corp.?
On this page, 4 holders' latest ownership filings report 5% or more of Occidental Petroleum Corp.: Warren E. Buffett (32.7%, Schedule 13G/A, filed 2025-08-14), Dodge & Cox (7.5%, Schedule 13G/A, filed 2026-05-14), Vanguard Capital Management (5.51%, Schedule 13G, filed 2026-04-30) and Blackrock, Inc. (5.2%, Schedule 13G, filed 2026-07-29).
Who are the largest shareholders of Occidental Petroleum Corp.?
By the share each holder's latest filing reports, the largest holders of Occidental Petroleum Corp. on this page are Warren E. Buffett (32.7%), Dodge & Cox (7.5%) and Vanguard Capital Management (5.51%).
When did Warren E. Buffett buy into Occidental Petroleum Corp.?
The filings give report dates, not purchase dates. The earliest filing from Warren E. Buffett on this page is the Schedule 13G/A, filed 2025-08-14, reporting 32.7%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 5 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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| Filed | Person | Role | Change | Effective |
|---|---|---|---|---|
| Form 8-K, 2026-05-04 | Vicki Hollub | President and Chief Executive Officer | departed | 2026-06-01 |
Which insiders own Occidental Petroleum Corp. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- Berkshire Hathaway Inc., a 10% owner: 264,941,431 shares (26.5% of shares outstanding), held indirectly (the form names the holder only in its footnotes), on a joint filing (Form 4, 2025-02-11).
- , a 10% owner: 264,941,431 shares (26.5% of shares outstanding), held indirectly (the form names the holder only in its footnotes), on a joint filing (Form 4, 2025-02-11).
- , a director: 974,835 shares (0.10% of shares outstanding) (Form 4, 2026-09-29).
- , the chief executive and president: 450,071 shares (0.05% of shares outstanding), 439,974 held directly and 10,097 indirectly (Form 4, 2026-10-02).
- , the president: 392,231 shares (0.04% of shares outstanding), 372,201 held directly and 20,030 indirectly (Form 4, 2026-03-03).
Shares outstanding: 999,894,745 as of 2026-10-31, from the company's latest SEC cover page.
How much has Occidental Petroleum Corp. raised?
Acquisitions reported on Form 8-K, Item 2.01: completed an acquisition (2026-01-02).
Keep reading
More on Occidental Petroleum Corp. and the records around it.
Occidental Petroleum Corp. elsewhere on the record
- Leadership changes May 2026
Companies that share a holder
- Warren E. Buffett also filed stake reports on 13 other companies: LENNAR CORPORATION (Oct 2026), DOMINO'S PIZZA, INC. (May 2026), LIBERTY LATIN AMERICA LTD (May 2026)
- Dodge & Cox also filed stake reports on 36 other companies: Charter Communications, Inc. (Aug 2026), SUN COMMUNITIES, INC (Aug 2026), TransUnion (Jun 2026)
- Vanguard Capital Management also filed stake reports on 1495 other companies: A10 Networks Inc (Oct 2026), Altisource Portfolio Solutions SA (Oct 2026), Alto Neuroscience Inc (Oct 2026)
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