Upstream Guyana Exploration

SUPPLEMENTAL INFORMATION Important information and assumptions regarding certain forward-looking statements. Forward-looking statements contained in this presentation regarding future potential are not forecasts of actual future results. These figures are provided to help quantify the targeted future results and goals of currently-contemplated management plans and objectives including new project investments, plans to grow Upstream production volumes, continued highgrading of ExxonMobil's portfolio through our ongoing asset management program, initiatives to improve efficiencies and reduce costs, and other efforts within management's control to impact future results as discussed in this presentation. These figures are intended to quantify for illustrative purposes management's view of the potentials for these efforts over the time periods shown, calculated on a basis consistent with our internal modelling assumptions for factors such as working capital and capital structure, as well as factors management does not control, such as interest, differentials, and exchange rates. See the Cautionary Statement at the front of this presentation for additional information regarding forward-looking statements. Other information All references to production rates and project capacity are on a gross basis, unless otherwise noted. References to resource size are on a net basis, unless otherwise noted. ExxonMobil has business relationships with thousands of customers, suppliers, governments, and others. For convenience and simplicity, words such as venture, joint venture, partnership, co-venturer, and partner are used to indicate business and other relationships involving common activities and interests, and those words may not indicate precise legal relationships. Definitions Project. The term "project" as used in this presentation can refer to a variety of different activities and does not necessarily have the same meaning as in any government payment transparency reports. Resources, resource base, and recoverable resources.. These and similar terms refer to the total remaining estimated quantities of oil and natural gas that are expected to be ultimately recoverable. ExxonMobil refers to new discoveries and acquisitions of discovered resources as resource additions. The resource base includes quantities of oil and natural gas classified as proved reserves, as well as quantities that are not yet classified as proved reserves but that are expected to be ultimately recoverable. The term "resource base" or similar terms are not intended to correspond to SEC definitions such as "probable" or "possible" reserves. "Potential” resource amounts are not currently included in the resource base. 23

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