2 Cautionary Statements Forward-Looking StatementsThis presentation contains “forward-looking statements” within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995, including but not limited to statements about Occidental Petroleum Corporation’s (“Occidental”) expectations, beliefs, plans or forecasts. Forward-looking statements involve estimates, expectations, projections, goals, forecasts, assumptions, risks and uncertainties, many of which involve factors or circumstances that are beyond Occidental’s control. 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 and 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”). Additional factors related to the proposed transaction between Occidental and Anadarko Petroleum Corporation (“Anadarko”) appear in the definitive proxy statement/prospectus that is a part of Occidental’s registration statement on Form S-4, as amended (the “Registration Statement”), which was declared effective by the SEC on July 11, 2019, in connection with the proposed transaction between Occidental and Anadarko. 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.Additional Information and Where to Find ItIn connection with the proposed transaction with Anadarko, Occidental has filed with the SEC the Registration Statement, containing a prospectus of Occidental that also constitutes a proxy statement of Anadarko. Anadarko mailed a definitive proxy statement/prospectus to stockholders of Anadarko. In connection with the consent solicitation by Carl C. Icahn and certain related parties, Occidental has also filed with the SEC a consent revocation solicitation statement on Schedule 14A and mailed such consent revocation solicitation statement to stockholders of Occidental. This presentation is not a substitute for the proxy statement/prospectus or Registration Statement or other document Occidental and/or Anadarko has filed or may file with the SEC in connection with the proposed transaction between Occidental and Anadarko or a substitute for any consent revocation solicitation statement or other document that Occidental has filed or may file with the SEC in connection with any solicitation by Occidental. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE PROXY STATEMENT/PROSPECTUS, THE REGISTRATION STATEMENT, THE CONSENT REVOCATION SOLICITATION STATEMENT (INCLUDING, IN EACH CASE, ANY AMENDMENTS OR SUPPLEMENTS THERETO) FILED BY OCCIDENTAL AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC CAREFULLY AND IN THEIR ENTIRETY BECAUSE THEY CONTAIN OR WILL CONTAINIMPORTANT INFORMATION ABOUT OCCIDENTAL, ANADARKO, THE PROPOSED TRANSACTION AND ANY SOLICITATION. Investors and security holders may obtain copies of these documents 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 are also 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 or consent nor a substitute for any proxy statement or consent revocation solicitation statement or other filings that may be made with the SEC. Nonetheless, Occidental, Anadarko and their 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 transaction between Occidental and Anadarko. In addition, Occidental, its directors and executive officers and other members of management and employees may be deemed to be participants in the solicitation of proxies with respect to a solicitation by Occidental. 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, in its proxy statement for the 2019 Annual Meeting which was filed with the SEC on March 28, 2019 and in its Form 8-K which was filed with the SEC on July 15, 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. Information about Anadarko’s executive officers and directors is available in Anadarko’s Annual Report on Form 10-K for the year ended December 31, 2018, which was filed with the SEC on February 14, 2019, and in its proxy statement for the 2019 Annual Meeting which was filed with the SEC on March 29, 2019. Additional information regarding the interests of such potential participants is included in the Registration Statement, proxy statement/prospectus and is or will be included in other relevant documents filed with the SEC. These documents are or 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.