2 Cautionary Statements Forward-Looking StatementsAny statements in this presentation about
Occidental Petroleum Corporation’s (“Occidental”) expectations, beliefs, plans or forecasts, including statements regarding the proposed transaction between Occidental and Anadarko Petroleum Corporation (“Anadarko”) or the proposed
transaction between Occidental and Total S.A. (“Total”), benefits and synergies of the proposed transactions and future opportunities for the combined company and products and securities, that are not historical facts are forward-looking
statements. These statements are typically identified by words such as “estimate,” “project,” “predict,” “will,” “would,” “should,” “could,” “may,” “might,” “anticipate,” “plan,” “intend,” “believe,” “expect,” “aim,” “goal,” “target,”
“objective,” “likely” or similar expressions that convey the prospective nature of events or outcomes. Forward-looking statements involve estimates, expectations, projections, goals, forecasts, assumptions, risks and uncertainties. Actual
results may differ from anticipated results, sometimes materially, and reported or expected results should not be considered an indication of future performance. Factors that could cause actual results to differ include, but are not limited
to: global commodity pricing fluctuations; changes in supply and demand for Occidental’s products; higher-than-expected costs; the regulatory approval environment; not successfully completing, or any material delay of, field developments,
expansion projects, capital expenditures, efficiency projects, acquisitions or dispositions; technological developments; uncertainties about the estimated quantities of oil and natural gas reserves; lower-than-expected production from
operations, development projects or acquisitions; exploration risks; general economic slowdowns domestically or internationally; political conditions and events; liability under environmental regulations including remedial actions;
litigation; disruption or interruption of production or manufacturing or facility damage due to accidents, chemical releases, labor unrest, weather, natural disasters, cyber-attacks or insurgent activity; and failures in risk management. Such
factors also include Occidental’s ability to consummate the proposed transaction with Anadarko or the proposed transaction with Total; the conditions to the completion of the proposed transactions, including the receipt of Anadarko
stockholder approval for the proposed transaction between Occidental and Anadarko; that the regulatory approvals required for the proposed transactions may not be obtained on the terms expected or on the anticipated schedule or at all;
Occidental’s ability to finance the proposed transaction with Anadarko, including completion of any contemplated equity investment; Occidental’s indebtedness, including the substantial indebtedness Occidental expects to incur in connection
with the proposed transaction with Anadarko and the need to generate sufficient cash flows to service and repay such debt; Occidental’s ability to meet expectations regarding the timing, completion and accounting and tax treatments of the
transaction contemplated by the binding agreement with Total or the proposed transaction with Anadarko; the possibility that Occidental may be unable to achieve expected synergies and operating efficiencies within the expected time-frames or
at all and to successfully integrate Anadarko’s operations with those of Occidental; that such integration may be more difficult, time-consuming or costly than expected; that operating costs, customer loss and business disruption (including,
without limitation, difficulties in maintaining relationships with employees, customers or suppliers) may be greater than expected following the proposed transaction or the public announcement of the proposed transaction; the retention of
certain key employees of Anadarko may be difficult; that Anadarko and Occidental are subject to intense competition and increased competition is expected in the future; general economic conditions that are less favorable than expected.
Additional risks that may affect Occidental’s results of operations and financial position appear in Part I, Item 1A “Risk Factors” of Occidental’s Annual Report on Form 10-K for the year ended December 31, 2018, and in Occidental’s other
filings with the U.S. Securities and Exchange Commission (“SEC”). Because the factors referred to above could cause actual results or outcomes to differ materially from those expressed or implied in any forward-looking statements, you should
not place undue reliance on any such forward-looking statements. Further, any forward-looking statement speaks only as of the date of this presentation and, unless legally required, Occidental does not undertake any obligation to update any
forward-looking statement, as a result of new information, future events or otherwise.No Offer or SolicitationThis presentation does not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of
any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No
offer of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.Additional Information and Where to Find ItIn connection with the proposed transaction,
Occidental will file with the SEC a registration statement on Form S-4 containing a preliminary prospectus of Occidental that also constitutes a preliminary proxy statement of Anadarko. After the registration statement is declared effective,
Anadarko will mail a definitive proxy statement/prospectus to stockholders of Anadarko. This communication is not a substitute for the proxy statement/prospectus or registration statement or for any other document that Occidental or Anadarko
may file with the SEC and send to Anadarko’s stockholders in connection with the proposed transaction. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE PROXY STATEMENT/PROSPECTUS, REGISTRATION STATEMENT, AND ANY OTHER RELEVANT DOCUMENTS
FILED WITH THE SEC CAREFULLY AND IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLEBECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT OCCIDENTAL, ANADARKO AND THE PROPOSED TRANSACTION. Any definitive proxy statement/prospectus (when available)
will be mailed to stockholders of Anadarko. Investors and security holders will be able to obtain copies of thesedocuments (when available) and other documents filed with the SEC by Occidental and Anadarko free of charge through the website
maintained by the SEC at www.sec.gov. Copies of the documents filed by Occidental and Anadarko (when available) will also be available free of charge by accessing their websites at www.oxy.com and www.anadarko.com,
respectively.ParticipantsThis presentation is neither a solicitation of a proxy nor a substitute for any proxy statement or other filings that may be made with the SEC. Nonetheless, Occidental and its directors and executive officers and
other members of management and employees may be deemed to be participants in the solicitation of proxies in respect of the proposed transactions. Information about Occidental’s executive officers and directors is available in Occidental’s
Annual Report on Form 10-K for the year ended December 31, 2018, which was filed with the SEC on February 21, 2019, and in its proxy statement for the 2019 Annual Meeting which was filed with the SEC on March 28, 2019. To the extent holdings
of Occidental securities have changed since the amounts printed in the proxy statement for the 2019 Annual Meeting, such changes have been or will be reflected on Statements of Change in Ownership on Form 4 filed with the SEC. Additional
information regarding the interests of such potential participants will be included in the registration statement, proxy statement/prospectus and other relevant documents filed with the SEC when they become available. These documents will be
available free of charge from the sources indicated above.Use of non-GAAP Financial InformationThis presentation includes non-GAAP financial measures. Where available, reconciliations to comparable GAAP financial measures can be found on
Occidental's website at www.oxy.com. Occidental is unable to provide a reconciliation of non-GAAP financial measures contained in this presentation that are presented on a forward-looking basis because Occidental is unable, without
unreasonable efforts, to estimate and quantify the most directly comparable GAAP components, largely because predicting future operating results is subject to many factors outside of Occidental's control and not readily predictable and that
are not part of Occidental's routine operating activities, including various domestic and international economic, regulatory, political and legal factors.Cautionary Note to U.S. InvestorsThe SEC permits oil and gas companies, in their filings
with the SEC, to disclose only proved, probable and possible reserves. Any reserve estimates provided in this presentation that are not specifically designated as being estimates of proved reserves may include "potential" reserves and/or
other estimated reserves not necessarily calculated in accordance with, or contemplated by, the SEC’s latest reserve reporting guidelines. U.S. investors are urged to consider closely the oil and gas disclosures in our 2018 Form 10-K and
other reports and filings with the SEC. Copies are available from the SEC and through our website, www.oxy.com.