EXHIBIT 21 Subsidiaries of the Registrant (1), (2) and (3) AT DECEMBER 31, 1996
PERCENTAGE OF VOTING SECURITIES OWNED BY STATE OR IMMEDIATE COUNTRY OF PARENT(S) ORGANIZATION ----------------- ------------ Ancon Insurance Company, Inc. ................... 100 Vermont Esso Australia Resources Ltd. ................... 100 Delaware Delhi Petroleum Pty. Ltd. ...................... 100 Australia Esso Eastern Inc. ............................... 100 Delaware Esso Malaysia Berhad............................ 65 Malaysia Esso Production Malaysia Inc. .................. 100 Delaware Esso Sekiyu Kabushiki Kaisha.................... 100 Japan Esso Singapore Private Limited.................. 100 Singapore Esso (Thailand) Public Company Limited.......... 87.5 Thailand Exxon Energy Limited............................ 100 Hong Kong Exxon Trading Asia Pacific Private Limited...... 100 Singapore Exxon Yemen Inc................................. 100 Delaware General Sekiyu K.K.(5)(6)....................... 49 Japan Tonen Kabushiki Kaisha(5)....................... 25 Japan Esso Italiana S.p.A.(7).......................... 100 Italy Esso Standard Oil S.A. Limited................... 100 Bahamas Exxon Asset Management Company................... 75.5 Delaware Exxon Capital Holdings Corporation............... 100 Delaware Exxon Capital Corporation....................... 100 New Jersey Exxon Capital Investment, Inc................. 100 Delaware Exxon Chemical Asset Management Partnership(8)... 100 Delaware Exxon Mobile Bay Limited Partnership(9)......... 100 Delaware Paxon Polymer Company, L.P. II(10)............ 100 Delaware Exxon Chemical Eastern Inc....................... 100 Delaware Exxon Chemical Asia Private Limited............. 100 Singapore Exxon Chemical Singapore Private Limited........ 100 Singapore Singapore Aromatics Company Private (5)....... 50 Singapore Exxon Chemical HDPE Inc. ........................ 100 Delaware Exxon Coal USA, Inc. ............................ 100 Delaware Exxon Credit Corporation......................... 100 Delaware
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PERCENTAGE OF VOTING SECURITIES OWNED BY IMMEDIATE STATE OR COUNTRY OF PARENT(S) ORGANIZATION ----------------- -------------------- Exxon International Holdings, Inc................................ 100 Delaware Esso Aktiengesellschaft(11)..................................... 100 Germany BRIGITTA Erdgas und Erdoel GmbH, Hannover(4)(5)............... 50 Germany Elwerath Erdgas und Erdoel GmbH, Hannover(4)(5)............... 50 Germany Mineraloelraffinerie Oberrhein GmbH & Co. KG(5)............... 25 Germany Esso Austria Aktiengesellschaft(12)............................. 100 Austria Esso Exploration and Production Norway AS....................... 100 Norway Esso Holding Company Holland Inc................................ 100 Delaware Esso Holding B.V.............................................. 100 Netherlands/Delaware Esso N.V./S.A. (13).......................................... 100 Belgium/Delaware Exxon Chemical Antwerp Ethylene N.V. (14).................... 100 Belgium Fina Antwerp Olefins N.V.(5)................................ 35 Belgium Esso Nederland B.V............................................ 100 Netherlands Exxon Chemical Holland Inc.................................... 100 Delaware Exxon Chemical Holland B.V................................... 100 Netherlands N. V. Nederlandse Gasunie(5).................................. 25 Netherlands Nederlandse Aardolie Maatschappij B.V. (4)(5)................. 50 Netherlands Esso Holding Company U.K. Inc................................... 100 Delaware Esso UK plc................................................... 100 England Esso Exploration and Production UK Limited................... 100 England Esso Petroleum Company, Limited.............................. 100 England Exxon Chemical Limited........................................ 100 England Exxon Chemical Olefins Inc.................................... 100 Delaware Esso Norge AS................................................... 100 Norway Esso Sociedad Anonima Petrolera Argentina....................... 100 Argentina Esso Societe Anonyme Francaise.................................. 81.548 France Esso (Switzerland).............................................. 100 Switzerland Exxon Land Development, Inc...................................... 100 Arizona Exxon Minerals International Inc................................. 100 Delaware Compania Minera Disputada de Las Condes S.A..................... 99.9252 Chile Exxon Overseas Corporation....................................... 100 Delaware Exxon Chemical Arabia Inc....................................... 100 Delaware Al-Jubail Petrochemical Company(4)(5)......................... 50 Saudi Arabia Exxon Overseas Investment Corporation........................... 100 Delaware Exxon Equity Holding Company.................................. 100 Delaware Exxon Financial Services Company Limited...................... 100 Bahamas Exxon Ventures Inc............................................ 100 Delaware Exxon Azerbaijan Limited..................................... 100 Bahamas Mediterranean Standard Oil Co................................... 100 Delaware Esso Trading Company of Abu Dhabi............................. 100 Delaware Exxon Pipeline Holdings, Inc..................................... 100 Delaware Exxon Pipeline Company.......................................... 100 Delaware Exxon Rio Holding Inc............................................ 100 Delaware Esso Brasileira de Petroleo Limitada(15)........................ 100 Brazil Exxon Sao Paulo Holding Inc...................................... 100 Delaware Imperial Oil Limited............................................. 69.6 Canada International Colombia Resources Corporation(16)................. 100 Delaware SeaRiver Maritime Financial Holdings, Inc........................ 100 Delaware SeaRiver Maritime, Inc.......................................... 100 Delaware Societe Francaise EXXON CHEMICAL................................. 99.359 France Exxon Chemical France........................................... 100 France Exxon Chemical Polymeres SNC(17)................................ 100 France
2 - - --------------------- NOTES: (1) For 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. (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. (6) Dual ownership; of the 49%, 47.468% is owned by Esso Eastern Inc. and 1.532% is owned by Esso Sekiyu Kabushiki Kaisha. (7) Dual ownership; of the 100%, 90% is owned by Exxon Corporation and 10% by Exxon Overseas Corporation. (8) Dual ownership; of the 100%, 68.4% is owned by Exxon Corporation and 31.6% is owned by Exxon Asset Management Company. (9) Dual ownership; of the 100%, 81.4% is owned by Exxon Chemical Asset Management Partnership and 18.6% is owned by Exxon Corporation. (10) Dual ownership; of the 100%, 98% is owned by Exxon Mobile Bay Limited Partnership and 2% is owned by Exxon Chemical HDPE Inc. (11) Dual ownership; of the 100%, 99.998% is owned by Exxon International Holdings, Inc. and 0.002% is owned by Exxon Corporation. (12) Dual ownership; of the 100%, 99.9996% is owned by Exxon International Holdings, Inc. and 0.0004% is owned by Exxon Corporation. (13) Dual ownership; of the 100%, 99.99997% is owned by Esso Holding B.V. and 0.00003% is owned by Exxon Chemical Holland Inc. (14) Dual ownership; of the 100%, 99.9994% is owned by Esso Holding B.V. and 0.0006% is owned by Exxon Chemical Holland Inc. (15) Dual ownership; of the 100%, 90% is owned by Exxon Rio Holding Inc. and 10% is owned by Exxon Sao Paulo Holding Inc. (16) Dual ownership; of the 100%, 55% is owned by Exxon Corporation and 45% is owned by Esso Holding Company Holland Inc. (17) Dual ownership; of the 100%, 98% is owned by Societe Francaise EXXON CHEMICAL and 2% is owned by Exxon Chemical France. 3