EXHIBIT 21
Subsidiaries of the Registrant (1), (2) and (3) – at December 31, 2024

| Percentage of Voting Securities Owned Directly or Indirectly by Registrant |  | State or Country of Organization
AKG Marketing Company Limited | 87.5 |  | Bahamas
Al-Jubail Petrochemical Company (4) (5) | 50 |  | Saudi Arabia
Alberta Products Pipe Line Ltd. (5) | 45 |  | Canada
Ancon Insurance Company Inc. | 100 |  | Vermont
Barzan Gas Company Limited (5) | 7 |  | Qatar
BEB Erdgas und Erdoel GmbH & Co. KG (4) (5) | 50 |  | Germany
Canada Imperial Oil Limited | 69.6 |  | Canada
Caspian Pipeline Consortium (5) | 7.50 |  | Russia/Kazakhstan
Coral FLNG S.A. (5) | 25 |  | Mozambique
Cross Timbers Energy LLC (4) (5) | 50 |  | Delaware
Denbury Green Pipeline-Texas, LLC | 100 |  | Delaware
Denbury Gulf Coast Pipelines, LLC | 100 |  | Delaware
Denbury Onshore, LLC | 100 |  | Delaware
Ellora Energy Inc. | 100 |  | Delaware
Esso Australia Resources Pty Ltd | 100 |  | Australia
Esso Deutschland GmbH | 100 |  | Germany
Esso Erdgas Beteiligungsgesellschaft mbH | 100 |  | Germany
Esso Exploration and Production Angola (Overseas) Limited | 100 |  | Bahamas
Esso Exploration and Production Nigeria (Deepwater) Limited | 100 |  | Nigeria
Esso Exploration and Production Nigeria Limited | 100 |  | Nigeria
Esso Exploration and Production UK Limited | 100 |  | United Kingdom
Esso Exploration Angola (Block 15) Limited | 100 |  | Bahamas
Esso Exploration Angola (Block 17) Limited | 100 |  | Bahamas
Esso Italiana S.r.l. | 100 |  | Italy
Esso Nederland B.V. | 100 |  | Netherlands
Esso Norge AS | 100 |  | Norway
Esso Petroleum Company Limited | 100 |  | United Kingdom
Esso Societe Anonyme Francaise | 82.89 |  | France
Exxon Azerbaijan Limited | 100 |  | Bahamas
Exxon Chemical Arabia Inc. | 100 |  | Delaware
ExxonMobil (China) Investment Co. Ltd. | 100 |  | China
ExxonMobil (Huizhou) Chemical Co. Ltd. | 100 |  | China
ExxonMobil (Taicang) Petroleum Co. Ltd. | 100 |  | China
ExxonMobil Abu Dhabi Offshore Petroleum Company Limited | 100 |  | Bahamas
ExxonMobil Africa and Middle East Management Ltd | 100 |  | United Arab Emirates
ExxonMobil Alaska Production Inc. | 100 |  | Delaware
ExxonMobil Asia Pacific Pte. Ltd. | 100 |  | Singapore
ExxonMobil Australia Pty Ltd | 100 |  | Australia
ExxonMobil Barzan Limited | 100 |  | Bahamas
ExxonMobil Canada Ltd. | 100 |  | Canada

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| Percentage of Voting Securities Owned Directly or Indirectly by Registrant |  | State or Country of Organization
ExxonMobil Canada Properties | 100 |  | Canada
ExxonMobil Capital Hungary Kft. | 100 |  | Hungary
ExxonMobil Central Europe Holding GmbH | 100 |  | Germany
ExxonMobil Chemical France | 100 |  | France
ExxonMobil Chemical Gulf Coast Investments LLC | 100 |  | Delaware
ExxonMobil China Petroleum & Petrochemical Company Private Limited | 100 |  | Singapore
ExxonMobil Development Africa B.V. | 100 |  | Netherlands
ExxonMobil Egypt (S.A.E.) | 100 |  | Egypt
ExxonMobil Exploracao Brasil Ltda | 100 |  | Brazil
ExxonMobil Exploration and Production Malaysia Inc. | 100 |  | Delaware
ExxonMobil Finance Company Limited | 100 |  | United Kingdom
ExxonMobil Financial Investment Company Limited | 100 |  | United Kingdom
ExxonMobil Financial Services B.V. | 100 |  | Netherlands
ExxonMobil Gas Marketing Europe Limited | 100 |  | United Kingdom
ExxonMobil Global Services Company | 100 |  | Delaware
ExxonMobil Guyana Ltd. | 100 |  | Bahamas
ExxonMobil Holding Company Holland LLC | 100 |  | Delaware
ExxonMobil Italiana Gas S.r.l. | 100 |  | Italy
ExxonMobil Kazakhstan Inc. | 100 |  | Bahamas
ExxonMobil Kazakhstan Ventures Inc. | 100 |  | Delaware
ExxonMobil Marine Limited | 100 |  | United Kingdom
ExxonMobil Mexico S.A. de C.V. | 100 |  | Mexico
ExxonMobil Oil Corporation | 100 |  | New York
ExxonMobil Permian Highway Pipeline LLC | 100 |  | Delaware
ExxonMobil Petroleum & Chemical BV | 100 |  | Belgium
ExxonMobil Pipeline Company LLC | 100 |  | Delaware
ExxonMobil PNG Antelope Limited | 100 |  | Papua New Guinea
ExxonMobil PNG Limited | 100 |  | Papua New Guinea
ExxonMobil Qatargas (II) Limited | 100 |  | Bahamas
ExxonMobil Qatargas Inc. | 100 |  | Delaware
ExxonMobil Ras Laffan (III) Limited | 100 |  | Bahamas
ExxonMobil Rasgas Inc. | 100 |  | Delaware
ExxonMobil Sales and Supply LLC | 100 |  | Delaware
ExxonMobil Technology and Engineering Company | 100 |  | Delaware
ExxonMobil Upstream Integrated Solutions Company | 100 |  | Delaware
ExxonMobil Ventures Cyprus Limited | 100 |  | Cyprus
Fujian Refining & Petrochemical Co. Ltd. (5) | 25 |  | China
GasTerra B.V. (5) | 25 |  | Netherlands
Golden Pass LNG Terminal Investments LLC | 100 |  | Delaware
Golden Pass LNG Terminal LLC (5) | 30 |  | Delaware
Golden Pass Pipeline LLC (5) | 30 |  | Delaware

2

| Percentage of Voting Securities Owned Directly or Indirectly by Registrant |  | State or Country of Organization
Gulf Coast Growth Ventures LLC (4) (5) | 50 |  | Delaware
Imperial Oil Limited | 69.6 |  | Canada
Imperial Oil Resources Limited | 69.6 |  | Canada
Imperial Oil Resources N.W.T. Limited | 69.6 |  | Canada
Imperial Oil/Petroliere Imperiale | 69.6 |  | Canada
Infineum USA L.P. (4) (5) | 50 |  | Delaware
Marine Well Containment Company LLC (5) | 11.11 |  | Delaware
Mobil Australia Resources Company Pty Limited | 100 |  | Australia
Mobil Oil Australia Pty Ltd | 100 |  | Australia
Mobil Oil Exploration & Producing Southeast Inc. | 100 |  | Delaware
Mobil Oil New Zealand Limited | 100 |  | New Zealand
Mobil Yanbu Petrochemical Company Inc. | 100 |  | Delaware
Mobil Yanbu Refining Company Inc. | 100 |  | Delaware
Mozambique Rovuma Venture S.p.A. (5) | 35.714 |  | Italy
Nederlandse Aardolie Maatschappij B.V. (4) (5) | 50 |  | Netherlands
Palmetto Transoceanic LLC | 100 |  | Delaware
Papua New Guinea Liquefied Natural Gas Global Company LDC (5) | 33.2 |  | Bahamas
Permian Express Partners LLC (5) | 12.3 |  | Delaware
Permian Highway Pipeline LLC (5) | 17 |  | Delaware
Phillips Exploration LLC | 100 |  | Delaware
Pioneer Natural Resources Company | 100 |  | Delaware
Pioneer Natural Resources USA, Inc. | 100 |  | Delaware
Pioneer Water Management LLC | 100 |  | Delaware
QatarEnergy LNG N (2) (5) | 24.15 |  | Qatar
PT ExxonMobil Lubricants Indonesia | 100 |  | Indonesia
QatarEnergy LNG NFE (3) (5) | 25 |  | Qatar
QatarEnergy LNG S (1) (5) | 24.999 |  | Qatar
QatarEnergy LNG S (2) (5) | 30.517 |  | Qatar
QatarEnergy LNG S (3) (5) | 30 |  | Qatar
Saudi Aramco Mobil Refinery Company Ltd. (4) (5) | 50 |  | Saudi Arabia
Saudi Yanbu Petrochemical Co. (4) (5) | 50 |  | Saudi Arabia
SeaRiver Maritime Inc. | 100 |  | Delaware
SeaRiver Maritime LLC | 100 |  | Delaware
South Hook LNG Terminal Company Limited (5) | 24.15 |  | United Kingdom
Tengizchevroil LLP (5) | 25 |  | Kazakhstan
Wink to Webster Pipeline LLC | 46.875 |  | Delaware
XH LLC | 100 |  | Delaware
XTO Delaware Basin LLC | 100 |  | Texas
XTO Energy Inc. | 100 |  | Delaware
XTO Holdings LLC | 100 |  | Delaware
XTO Permian Midstream LLC | 100 |  | Delaware
XTO Permian Operating LLC | 100 |  | Texas

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NOTES:
(1)For the purposes of this list, if the registrant owns directly or indirectly approximately 50 percent of the voting securities of any person and approximately 50 percent of the voting securities of such person is owned directly or indirectly by another interest, or if the registrant includes its share of net income of any other unconsolidated person in consolidated net income, such person is deemed to be a subsidiary.
(2)With respect to certain companies, shares in names of nominees and qualifying shares in names of directors are included in the above percentages.
(3)The names of other subsidiaries have been omitted from the above list since considered in the aggregate, they would not constitute a significant subsidiary under Securities and Exchange Commission Regulation S-X, Rule 1-02(w).
(4)The registrant owns directly or indirectly approximately 50 percent of the securities of this person and approximately 50 percent of the voting securities of this person is owned directly or indirectly by another single interest.
(5)The investment in this unconsolidated person is represented by the registrant's percentage interest in the underlying net assets of such person. The accounting for these unconsolidated persons is referred to as the equity method of accounting.
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