Occidental Petroleum (OXY) FWPFree writing prospectus

*We expect that delivery of the notes will be made against payment therefor on or about July 13, 2020, which will be the tenth business day following the date of pricing of the notes (this settlement cycle being referred to as “T+10”). Pursuant to Rule 15c6-1 under the Exchange Act, trades in the secondary market generally are required to settle in two business days, unless the parties to that trade expressly agree otherwise. Accordingly, purchasers who wish to trade the notes on the date of this term sheet or the following seven business days will be required, by virtue of the fact that the notes initially will settle in T+10, to specify an alternate settlement cycle at the time of any such trade to prevent a failed settlement. Purchasers of notes should consult their own advisors.

**Note: A securities rating is not a recommendation to buy, sell or hold securities and may be subject to revision or withdrawal at any time. See “Risk Factors—Risks Related to the Notes—Our credit ratings may not reflect all risks of an investment in the notes and there is no protection in the indenture for holders of the notes in the event of a ratings downgrade. A downgrade in our credit rating could negatively impact our cost of and ability to access capital.” in the Company’s preliminary prospectus supplement dated June 25, 2020.

The Company has filed a registration statement (including a prospectus) and a related preliminary prospectus supplement with the U.S. Securities and Exchange Commission (“SEC”) for the offering to which this communication relates. Before you invest, you should read the preliminary prospectus supplement, the accompanying prospectus in that registration statement and other documents the Company has filed with the SEC for more complete information about the Company and this offering. You may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, the Company, any underwriter or any dealer participating in the offering will arrange to send you the prospectus and the related preliminary prospectus supplement if you request it by calling Citigroup Global Markets Inc. toll-free at 1-800-831-9146, J.P. Morgan Securities LLC toll-free at 1-866-803-9204, RBC Capital Markets LLC collect at 1-646-992-7318 or Wells Fargo Securities, LLC toll-free at 1-800-645-9751.