Vicki Hollub's departure as President and Chief Executive Officer of Occidental Petroleum Corp /De/ was reported, effective June 1, 2026; the filing names no successor. As of November 6, 2026, Occidental Petroleum Corp /De/ has reported one leadership change filing to the SEC under Item 5.02 of Form 8-K, on May 4, 2026, naming 1 departure (Form 8-K, May 4, 2026).
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Occidental Petroleum Corp /De/ reported a change among its directors and officers to the SEC on Form 8-K, Item 5.02, on 2026-05-04. It names 1 person. Every row below is cited to the filing it comes from, and this page adds each new change as Occidental Petroleum Corp /De/ files it.
Also on the record for Occidental Petroleum Corp /De/
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| July 29, 2026 | Stake report, Schedule 13G, by BlackRock, Inc. | 5.2% of the class | 5%+ stakes | Source |
| May 14, 2026 | Stake report, Schedule 13G/A, by Dodge & Cox | 7.5% of the class | 5%+ stakes | Source |
| April 30, 2026 | Stake report, Schedule 13G, by Vanguard Capital Management | 5.51% of the class | 5%+ stakes | Source |
| March 27, 2026 | Stake report, Schedule 13G/A, by The Vanguard Group | — | 5%+ stakes | Source |
| August 14, 2025 | Stake report, Schedule 13G/A, by Warren E. Buffett | 32.7% of the class | 5%+ stakes | Source |
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More on Occidental Petroleum Corp /De/ and the records around it.
Occidental Petroleum Corp /De/ elsewhere on the record
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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Timeline
| Filed | In / out | Person | Role | Effective | Source |
|---|---|---|---|---|---|
| 2026-05-04 | Out | President and Chief Executive Officer | 2026-06-01 | 8-K, 2026-05-04 |
Who leads Occidental Petroleum Corp /De/, as last reported?
For each role that changed in the filings below, the most recent change reported. A role that did not change in these filings is not listed.
- President and Chief Executive Officer: Vicki Hollub, departure reported, effective 2026-06-01 (filed 2026-05-04). No successor is named in these filings.
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Find candidates like President and Chief Executive Officer at Occidental Petroleum Corp /De/Every change, in the filing's words
Departing: Vicki Hollub, President and Chief Executive Officer, effective 2026-06-01
On April 30, 2026, Vicki Hollub, President and Chief Executive Officer ("CEO") of Occidental Petroleum Corporation ("Occidental"), informed the Board of Directors of Occidental (the "Board") of her decision to retire, effective as of June 1, 2026 (the "Transition Date").
- The Executive Compensation Committee of the Board determined that Ms. Hollub's retirement as President and CEO will be treated as an eligible retirement under Occidental's Retirement Policy (the "Retirement Policy"), and as provided in the Retirement Policy, Ms. Hollub and Occidental will enter into a separation and release agreement pursuant to which Ms. Hollub will receive the retirement benefits set forth in the Retirement Policy.
- Following her retirement as President and CEO, Ms. Hollub, who was elected as a member of the Board at Occidental's 2026 Annual Meeting of Shareholders, will continue to serve as a member of the Board.
- On April 30, 2026, as part of its management succession planning, the Board unanimously approved the appointment of Richard A. Jackson, 50, as Occidental's President and CEO and as a member of the Board, in each case effective as of the Transition Date.
- Mr. Jackson has over 25 years of experience in the oil and gas industry, holding a variety of technical and leadership roles.
- Mr. Jackson joined Occidental in 2003 and has served as Occidental's Senior Vice President and Chief Operating Officer since October 2025.
- Mr. Jackson's previous positions at Occidental include Senior Vice President and President of Operations for U.S. Onshore Resources and Carbon Management from October 2020 to October 2025.
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Where this comes from
A public company must file a current report on Form 8-K with the SEC within four business days when a director leaves or is elected, or when its chief executive, chief financial, chief accounting or chief operating officer, or another named executive, departs or is appointed. That disclosure goes under Item 5.02 of the report.
Every change on this page is taken from one of those filings and quoted in the company's own words, with a link to the filing, so it can be checked at the source. Where a filing names the person, the role and the date a change takes effect, they are shown beside the quote. Where it does not, the quote stands on its own. A filing states what changed; it rarely states why, and neither does this page.