UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of Earliest Event Reported): January 2, 2026

OCCIDENTAL PETROLEUM CORPORATION

(Exact Name of Registrant as Specified in its Charter)


Delaware	1-9210	95-4035997
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)


5 Greenway Plaza, Suite 110 Houston, Texas			77046
(Address of Principal Executive Offices)			(Zip Code)

Registrant’s Telephone Number, Including Area Code: (713) 215-7000

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:


☐			Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐			Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐			Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐			Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:


Title of Each Class	Trading Symbol(s)	Name of Each Exchange on Which Registered
Common Stock, $0.20 par value	OXY	New York Stock Exchange
Warrants to Purchase Common Stock, $0.20 par value	OXY WS	New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR 240.12b-2).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.01 Completion of Acquisition or Disposition of Assets.

As previously disclosed on a Current Report on Form 8-K filed with the U.S. Securities and Exchange Commission (the “SEC”) by Occidental Petroleum Corporation (“Occidental”) on October 3, 2025, Occidental Chemical Holding, LLC and Environmental Resource Holdings, LLC, each wholly-owned indirect subsidiaries of Occidental, entered into a purchase and sale agreement with Berkshire Hathaway Inc. (“Berkshire Hathaway”), dated as of October 1, 2025 (the “Purchase Agreement”). Subject to the terms and conditions set forth therein, Berkshire Hathaway agreed to acquire all of the issued and outstanding equity interests in Occidental Chemical Corporation, which holds Occidental’s chemical business, in an all-cash transaction (the “Divestiture”). On January 2, 2026, and pursuant to the Purchase Agreement, Occidental completed the Divestiture for $9.7 billion in cash, subject to customary purchase price adjustments as set forth in the Purchase Agreement.

The unaudited pro forma condensed consolidated statements of operations for Occidental for the nine months ended September 30, 2025, as well as the years ended December 31, 2024, 2023 and 2022, and an unaudited pro forma condensed consolidated balance sheet as of September 30, 2025, in each case giving effect to the Divestiture, is attached hereto as Exhibit 99.2.

The foregoing description of the Purchase Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Purchase Agreement, a copy of which was filed as Exhibit 2.1 to Occidental’s Form 8-K filed on October 3, 2025 and is incorporated herein by reference.

Item 7.01 Regulation FD Disclosure.

On January 2, 2026, Occidental issued a press release announcing the completion of the Divestiture. A copy of the press release is attached hereto as Exhibit 99.1.

The information contained in this Item 7.01, including Exhibit 99.1, is furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) or otherwise subject to the liabilities under that Section and shall not be deemed to be incorporated by reference into any filing of Occidental under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act.

Item 9.01 Financial Statements and Exhibits.

(b) Pro forma financial information.

The following unaudited pro forma financial information of Occidental, giving effect to the Divestiture and certain debt redemption transactions, is attached hereto as Exhibit 99.2:

•Unaudited Pro Forma Condensed Consolidated Balance Sheet as of September 30, 2025;

•Unaudited Pro Forma Condensed Consolidated Statement of Operations for the Nine Months Ended September 30, 2025; and

•Unaudited Pro Forma Condensed Consolidated Statements of Operations for the Years Ended December 31, 2024, 2023 and 2022.

(d) Exhibits.


2.1			Purchase and Sale Agreement, dated as of October 1, 2025, by and among Berkshire Hathaway Inc., Occidental Chemical Holding, LLC and, solely for the limited purposes therein, Environmental Resource Holdings, LLC (filed as Exhibit 2.1 to the Current Report on Form 8-K of Occidental filed on October 3, 2025, File No. 1-9210).*
99.1			Press Release, dated January 2, 2026, issued by Occidental Petroleum Corporation.
99.2			Unaudited Pro Forma Condensed Consolidated Balance Sheet as of September 30, 2025 and Unaudited Pro Forma Condensed Consolidated Statements of Operations for the nine months ended September 30, 2025 and for the years ended December 31, 2024, 2023 and 2022.
104			Cover Page Interactive Data File (embedded within the Inline XBRL document).

* Schedules and exhibits have been omitted pursuant to Item 601(b)(2) of Regulation S-K. The registrant agrees to furnish supplementally to the SEC a copy of any omitted schedule or exhibit upon request by the SEC.

Forward-Looking Statements

This Current Report on Form 8-K (“Current Report”) contains “forward-looking statements” within the meaning of Section 27A of the Securities Act, and Section 21E of the Exchange Act, including, but not limited to, statements about Occidental’s expectations, beliefs, plans or forecasts. Forward-looking statements involve estimates, expectations, projections, goals, forecasts, assumptions, risks and uncertainties. Actual outcomes or results may differ from anticipated results, sometimes materially. Factors that could cause results to differ from those projected or assumed in any forward-looking statement include, but are not limited to: general economic conditions, including slowdowns and recessions, domestically or internationally; Occidental’s indebtedness and other payment obligations, including the need to generate sufficient cash flows to fund operations; Occidental’s ability to successfully monetize select assets and repay or refinance debt and the impact of changes in Occidental’s credit ratings or future increases in interest rates; assumptions about energy markets; global and local commodity and commodity-futures pricing fluctuations and volatility; supply and demand considerations for, and the prices of, Occidental’s products and services; actions by the Organization of the Petroleum Exporting Countries (“OPEC”) and non-OPEC oil producing countries; results from operations and competitive conditions; future impairments of Occidental’s proved and unproved oil and gas properties or equity investments, or write-downs of productive assets, causing charges to earnings; unexpected changes in costs; government actions (including the effects of announced or future tariff increases and other geopolitical, trade, tariff, fiscal and regulatory uncertainties), war (including the Russia-Ukraine war and conflicts in the Middle East) and political conditions and events; inflation, its impact on markets and economic activity and related monetary policy actions by governments in response to inflation; availability of capital resources, levels of capital expenditures and contractual obligations; the regulatory approval environment, including Occidental’s ability to timely obtain or maintain permits or other government approvals, including those necessary for drilling and/or development projects; Occidental’s ability to successfully complete, or any material delay of, field developments, expansion projects, capital expenditures, efficiency projects, acquisitions or divestitures; risks associated with acquisitions, mergers and joint ventures, such as difficulties integrating businesses, uncertainty associated with financial projections or projected synergies, restructuring, increased costs and adverse tax consequences; uncertainties and liabilities associated with acquired and divested properties and businesses, including retained liabilities and indemnification obligations associated with the chemical business; uncertainties about the estimated quantities of oil, natural gas liquids and natural gas reserves; lower-than-expected production from development projects or acquisitions; Occidental’s ability to realize the anticipated benefits from prior or future streamlining actions to reduce fixed costs, simplify or improve processes and improve Occidental’s competitiveness; exploration, drilling and other operational risks; disruptions to, capacity constraints in, or other limitations on the pipeline systems that deliver Occidental’s oil and natural gas and other processing and transportation considerations; volatility in the securities, capital or credit markets, including capital market disruptions and instability of financial institutions; health, safety and environmental (“HSE”) risks, costs and liability under existing or future federal, regional, state, provincial, tribal, local and international HSE laws, regulations and litigation (including related to climate change or remedial actions or assessments); legislative or regulatory changes, including changes relating to hydraulic fracturing or other oil and natural gas operations, retroactive royalty or production tax regimes, and deep-water and onshore drilling and permitting regulations; Occidental’s ability to recognize intended benefits from its business strategies and initiatives, such as the Divestiture, Occidental’s low-carbon ventures businesses and announced greenhouse gas emissions reduction targets or net-zero goals; changes in government grant or loan programs; potential liability resulting from pending or future litigation, government investigations and other proceedings; disruption or interruption of production or manufacturing or facility damage due to accidents, chemical releases, labor unrest, weather, power outages, natural disasters, cyber-attacks, terrorist acts or insurgent activity; the scope and duration of global or regional health pandemics or epidemics and actions taken by government authorities and other third parties in connection therewith;

the creditworthiness and performance of Occidental’s counterparties, including financial institutions, operating partners and other parties; failure of risk management; Occidental’s ability to retain and hire key personnel; supply, transportation and labor constraints; reorganization or restructuring of Occidental’s operations; changes in state, federal or international tax rates, deductions, incentives or credits; and actions by third parties that are beyond Occidental’s control. Words such as “estimate,” “project,” “predict,” “will,” “would,” “should,” “could,” “may,” “might,” “anticipate,” “plan,” “intend,” “believe,” “think,” “envision,” “expect,” “aim,” “goal,” “target,” “objective,” “commit,” “advance,” “guidance,” “priority,” “focus,” “assumption,” “likely” or similar expressions that convey the prospective nature of events or outcomes generally indicate forward-looking statements. You should not place undue reliance on these forward-looking statements, which speak only as of the date of this Current Report unless an earlier date is specified. Unless legally required, Occidental does not undertake any obligation to update, modify or withdraw any forward-looking statement as a result of new information, future events or otherwise. Other factors that could cause actual results to differ from those described in any forward-looking statement appear in Part I, Item 1A “Risk Factors” of Occidental’s Annual Report on Form 10-K for the year ended December 31, 2024, in Part II, Item 1A “Risk Factors” of Occidental’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2025 and in Occidental’s other filings with the SEC.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.


January 2, 2026	OCCIDENTAL PETROLEUM CORPORATION
	By:	/s/ Christopher O. Champion
	Name:	Christopher O. Champion
	Title:	Vice President, Chief Accounting Officer and Controller

OCCIDENTAL PETROLEUM CORP /DE/ 8-K