EXHIBIT 21
Subsidiaries of the Registrant (1), (2) and (3) – at December 31, 2021
Percentage of
Voting Securities
Owned Directly
or Indirectly by
Registrant
State or
Country of Organization
Aera Energy LLC (5)
48.2California
AKG Marketing Company Limited87.5Bahamas
Al-Jubail Petrochemical Company (4) (5)
50Saudi Arabia
Alberta Products Pipe Line Ltd. (5)
45Canada
Ancon Insurance Company, Inc.100Vermont
Barzan Gas Company Limited (5)
7Qatar
BEB Erdgas und Erdoel GmbH & Co. KG (4) (5)
50Germany
Canada Imperial Oil Limited69.6Canada
Caspian Pipeline Consortium (5)
7.50Russia/Kazakhstan
CORAL FLNG, S.A. (5)
25Mozambique
Cross Timbers Energy, LLC (4) (5)
50Delaware
Ellora Energy Inc.100Delaware
Esso Australia Resources Pty Ltd100Australia
Esso Deutschland GmbH100Germany
Esso Erdgas Beteiligungsgesellschaft mbH100Germany
Esso Exploration and Production Angola (Overseas) Limited100Bahamas
Esso Exploration and Production Chad Inc.100Bahamas
Esso Exploration and Production Guyana Limited100Bahamas
Esso Exploration and Production Nigeria (Deepwater) Limited100Nigeria
Esso Exploration and Production Nigeria Limited100Nigeria
Esso Exploration and Production UK Limited100United Kingdom
Esso Exploration Angola (Block 15) Limited100Bahamas
Esso Exploration Angola (Block 17) Limited100Bahamas
Esso Italiana S.r.l.100Italy
Esso Nederland B.V.100Netherlands
Esso Norge AS100Norway
Esso Petroleum Company, Limited100United Kingdom
Esso Raffinage82.89France
Esso Societe Anonyme Francaise82.89France
Esso (Thailand) Public Company Limited65.99Thailand
Exxon Azerbaijan Limited100Bahamas
Exxon Chemical Arabia Inc.100Delaware
Exxon Neftegas Limited100Bahamas
ExxonMobil (China) Investment Co., Ltd.100China
ExxonMobil (Huizhou) Chemical Co., Ltd.100China
ExxonMobil (Taicang) Petroleum Co., Ltd.100China
ExxonMobil Abu Dhabi Offshore Petroleum Company Limited100Bahamas
ExxonMobil Africa and Middle East Management Ltd100United Arab Emirates
ExxonMobil Alaska Production Inc.100Delaware
ExxonMobil Asia Pacific Pte. Ltd.100Singapore

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Percentage of
Voting Securities
Owned Directly
or Indirectly by
Registrant
State or
Country of Organization
ExxonMobil Australia Pty Ltd100Australia
ExxonMobil Barzan Limited100Bahamas
ExxonMobil Canada Ltd.100Canada
ExxonMobil Canada Properties100Canada
ExxonMobil Capital B.V.100Netherlands
ExxonMobil Central Europe Holding GmbH100Germany
ExxonMobil Chemical France100France
ExxonMobil Chemical Gulf Coast Investments LLC100Delaware
ExxonMobil China Petroleum & Petrochemical Company Private Limited100Singapore
ExxonMobil Development Africa B.V.100Netherlands
ExxonMobil Egypt (S.A.E.)100Egypt
ExxonMobil Exploracao Brasil Ltda100Brazil
ExxonMobil Exploration and Production Malaysia Inc.100Delaware
ExxonMobil Exploration and Production Romania Limited100Bahamas
ExxonMobil Exploration and Production Tanzania Limited100Bahamas
ExxonMobil Exploration Argentina Sociedad de Responsabilidad Limitada70Argentina
ExxonMobil Finance Company Limited100United Kingdom
ExxonMobil Financial Investment Company Limited100United Kingdom
ExxonMobil Financial Services B.V.100Netherlands
ExxonMobil Gas Marketing Europe Limited100United Kingdom
ExxonMobil Global Services Company100Delaware
ExxonMobil Holding Company Holland LLC100Delaware
ExxonMobil Hong Kong Limited100Hong Kong
ExxonMobil Iraq Limited100Bahamas
ExxonMobil Italiana Gas S.r.l.100Italy
ExxonMobil Kazakhstan Inc.100Bahamas
ExxonMobil Kazakhstan Ventures Inc.100Delaware
ExxonMobil Marine Limited100United Kingdom
ExxonMobil Mexico, S.A. de C.V.100Mexico
ExxonMobil Oil Corporation100New York
ExxonMobil Permian Highway Pipeline LLC100Delaware
ExxonMobil Petroleum & Chemical BV100Belgium
ExxonMobil Pipeline Company100Delaware
ExxonMobil PNG Antelope Limited100Papua New Guinea
ExxonMobil PNG Limited100Papua New Guinea
ExxonMobil Qatargas (II) Limited100Bahamas
ExxonMobil Qatargas Inc.100Delaware
ExxonMobil Ras Laffan (III) Limited100Bahamas
ExxonMobil Rasgas Inc.100Delaware
ExxonMobil Research and Engineering Company100Delaware
ExxonMobil Upstream Integrated Solutions Company100Delaware
Fujian Refining & Petrochemical Co. Ltd. (5)
25China
Golden Pass LNG Terminal Investments LLC100Delaware
Golden Pass LNG Terminal LLC (5)
30Delaware

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Percentage of
Voting Securities
Owned Directly
or Indirectly by
Registrant
State or
Country of Organization
Golden Pass Pipeline LLC (5)
30Delaware
Gulf Coast Growth Ventures LLC (4) (5)
50Delaware
Imperial Oil Limited69.6Canada
Imperial Oil Resources Limited69.6Canada
Imperial Oil Resources N.W.T. Limited69.6Canada
Imperial Oil/Petroliere Imperiale69.6Canada
Marine Well Containment Company LLC (5)
10Delaware
Mobil Australia Resources Company Pty Limited100Australia
Mobil California Exploration & Producing Asset Company100Delaware
Mobil Equatorial Guinea Inc.100Delaware
Mobil Oil Australia Pty Ltd100Australia
Mobil Oil Exploration & Producing Southeast Inc.100Delaware
Mobil Oil New Zealand Limited100New Zealand
Mobil Producing Nigeria Unlimited100Nigeria
Mobil Yanbu Petrochemical Company Inc.100Delaware
Mobil Yanbu Refining Company Inc.100Delaware
Mozambique Rovuma Venture, S.p.A. (5)
35.714Italy
Nederlandse Aardolie Maatschappij B.V. (4) (5)
50Netherlands
Palmetto Transoceanic LLC100Delaware
Papua New Guinea Liquefied Natural Gas Global Company LDC (5)
33.2Bahamas
Permian Express Partners LLC (5)
12.3Delaware
Permian Highway Pipeline LLC (5)
20Delaware
Phillips Exploration, LLC100Delaware
Qatar Liquefied Gas Company Limited (5)
10Qatar
Qatar Liquefied Gas Company Limited (2) (5)
24.15Qatar
Ras Laffan Liquefied Natural Gas Company Limited (5)
24.999Qatar
Ras Laffan Liquefied Natural Gas Company Limited (II) (5)
30.517Qatar
Ras Laffan Liquefied Natural Gas Company Limited (3) (5)
30Qatar
Saudi Aramco Mobil Refinery Company Ltd. (4) (5)
50Saudi Arabia
Saudi Yanbu Petrochemical Co. (4) (5)
50Saudi Arabia
SeaRiver Maritime, Inc.100Delaware
SeaRiver Maritime LLC100Delaware
South Hook LNG Terminal Company Limited (5)
24.15United Kingdom
Tengizchevroil, LLP (5)
25Kazakhstan
Terminale GNL Adriatico S.r.l. (5)
70.678Italy
Wink to Webster Pipeline LLC45Delaware
Worex S.N.C.82.89France
XH, LLC100Delaware
XTO Delaware Basin, LLC100Texas
XTO Energy Canada84.8Canada
XTO Energy Inc.100Delaware
XTO Holdings, LLC100Delaware
XTO Permian Midstream, LLC100Delaware
XTO Permian Operating, LLC100Texas

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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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