EXXON MOBIL CORP

For the year ended December 31, 2025, 35%, 23% and 12% of our oil, natural gas and NGL revenues were attributable to Shell Trading (US) Company, Exxon Mobil Corporation and Chevron Corporation, respectively, which are the customers that individually represented 10% or more of our oil, natural gas and NGL revenues.

The percent of consolidated revenue of major customers, those whose total represented 10% or more of the Company’s oil, natural gas and NGL revenues, was as follows: Year Ended December 31, 2025 2024 2023 Shell Trading (US) Company 35 % 48 % 54 % Exxon Mobil Corporation 23 % 17 % ** Valero Energy Corporation ** ** 21 % Chevron Corporation 12 % ** ** ** Less than 10%The loss of a major customer could have material adverse effect on the Company in the short term.

For the year ended December 31, 2024, 48% and 17% of our oil, natural gas and NGL revenues were attributable to Shell Trading (US) Company and Exxon Mobil Corporation, respectively, which are the customers that individually represented 10% or more of our oil, natural gas and NGL revenues.

For the Successor period of November 20, 2020 through December 31, 2020, sales to ExxonMobil Oil Corporation and Phillips 66 Company accounted for approximately 22% and 15%, respectively, of the Company’s total product sales.

Royalties operating revenues from properties operated by Exxon Mobil Corporation and its subsidiaries and Chevron Corporation and its subsidiaries represented approximately 15% and 10% of total operating revenues for the year ended December 31, 2025, respectively.

Royalties operating revenues from properties operated by Exxon Mobil Corporation and its subsidiaries and Diamondback Energy, Inc. represented approximately 16% and 15% of total operating revenues for the year ended December 31, 2024, respectively.

ExxonMobil Global Services Co * 12 %

Permian Highway Pipeline (c) 0 % 10 % 0 % 7 %

(“Esso”) 10% 2% —% ExxonMobil Technology and Engineering Company (f/k/a ExxonMobil Research and Engineering Company) (EMTEC) 8% 8% 8% Ameresco/Sacramento Sewer 7% —% —% Korea Southern Power Company (KOSPO) 1% 31% 6% Korea Fuel Cell Co., Ltd (KFC) —% 16% 46% Total 65% 70% 74% Derivatives We do not use derivatives for speculative or trading purposes.

ExxonMobil Technology and Engineering Company (f/k/a ExxonMobil Research and Engineering Company) (EMTEC) 8 % 8 % 29 %

ExxonMobil Technology and Engineering Company (f/k/a ExxonMobil Research and Engineering Company) (EMTEC) 8 % 29 % 32 %

Exxon Mobil Corp 8 % 12 % 9 % 14 %

Exxon Mobil Corp 9 % 14 % 10 % 15 %

Exxon Mobil Corp 10 % 16 %

Exxon Mobil Corp 12 % 10 % 14 % 9 %

Exxon Mobil Corp 14 % 12 % 15 % 9 %

Exxon Mobil Corp 16 % 8 %

Exxon Mobil Corp 10 % 15 % 9 % 8 %

Exxon Mobil Corp 12 % 3 % 9 % 4 %

The table below summarizes the purchasers that accounted for 10% or more of the Company’s total net revenues for the periods presented: Year Ended December 31,202120202019BP America50 %47 %37 %Shell Trading (US) Company22 %20 %11 %Eagleclaw Midstream Ventures, LLC11 %8 %8 %ExxonMobil Oil Corporation— %4 %26 %

Some of our largest customers include Exxon Mobil Corporation, MV Purchasing, BP, Shell, and Phillips 66.

For the year ended December 31, 2025, Exxon Mobil Corporation (“ExxonMobil”), Occidental Petroleum Corporation, EOG Resources, Inc. and Permian Resources Corporation accounted for 24.9%, 13.7%, 12.1%, and 11.2%, respectively, of total revenue.