EXHIBIT 21
 
 Subsidiaries of the Registrant (1), (2) and (3)
 
                              AT DECEMBER 31, 1994
 


                                            PERCENTAGE OF
                                          VOTING SECURITIES
                                              OWNED BY
                                              IMMEDIATE     STATE OR COUNTRY OF
                                              PARENT(S)         ORGANIZATION
                                          ----------------- --------------------
                                                      
Ancon Insurance Company, Inc............      100           Vermont
Esso Aktiengesellschaft.................      100           Germany
 BRIGITTA Erdgas und Erdoel GmbH, Hanno-
  ver(4)(5).............................       50           Germany
 Elwerath Erdgas und Erdoel GmbH, Hanno-
  ver(4)(5).............................       50           Germany
Esso Australia Resources Ltd. ..........      100           Delaware
 Delhi Petroleum Pty. Ltd...............      100           Australia
Esso Austria Aktiengesellschaft.........      100           Austria
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 Standard Thailand Ltd. ...........       87.5         Thailand
 Exxon Energy Limited...................      100           Hong Kong
 General Sekiyu K.K.(5)(6)..............       49           Japan
 P. T. Stanvac Indonesia(4)(5)..........       50           Indonesia
 Tonen Kabushiki Kaisha(5)..............       25           Japan
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. .......................      100           Belgium/Delaware
 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 Italiana S.p.A.(7).................      100           Italy
Esso Norge AS ..........................      100           Norway
Esso Sociedad Anonima Petrolera Argenti-
 na.....................................      100           Argentina
Esso Societe Anonyme Francaise..........       81.548       France
Esso Standard Oil S. A. Limited.........      100           Bahamas
Esso (Switzerland)......................      100           Switzerland
Exxon Asset Management Company..........       75.5         Delaware
Exxon Chemical Asset Management Partner-
 ship(8)................................      100           Delaware
 Exxon Mobile Bay Partnership(9)........      100           Delaware

 
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                                             PERCENTAGE OF
                                           VOTING SECURITIES
                                               OWNED BY
                                               IMMEDIATE     STATE OR COUNTRY OF
                                               PARENT(S)        ORGANIZATION
                                           ----------------- -------------------
                                                       
Exxon Coal USA, Inc......................      100              Delaware
Exxon Equity Holding Company.............      100              Delaware
Exxon Minerals International Inc.........      100              Delaware
 Compania Minera Disputada de Las Condes
  S.A. ..................................       99.9466         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 Financial Services Company Limit-
   ed....................................      100              Bahamas
   Petroleum Shipping Ltd.(10)...........      100              Bahamas
 Mediterranean Standard Oil Co...........      100              Delaware
  Esso Trading Company of Abu Dhabi......      100              Delaware
Exxon Pipeline Company...................      100              Delaware
Exxon Rio Holding Inc....................      100              Delaware
 Esso Brasileira de Petroleo
  Limitada(11)...........................      100              Brazil
Exxon San Joaquin Production Company.....      100              Louisiana
Exxon Trading Asia Pacific Private Limit-
 ed......................................      100              Singapore
Exxon Trading Company International......      100              Delaware
Exxon Yemen Inc..........................      100              Delaware
Friendswood Development Company..........      100              Arizona
Imperial Oil Limited.....................       69.6            Canada
International Colombia Resources Corpora-
 tion(12)................................      100              Delaware
SeaRiver Maritime Financial Holdings
 Inc. ...................................      100              Delaware
 SeaRiver Maritime, Inc. ................      100              Delaware
Societe Francaise EXXON CHEMICAL.........       99.359          France
 Exxon Chemical Polymeres SNC(13)........      100              France

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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% by Esso Sekiyu Kabushiki Kaisha.
 (7) Dual ownership; of the 100%, 99% is owned by Exxon Corporation and 1% by
     Exxon Overseas Corporation.
 (8) Dual ownership; of the 100%, 69.8% is owned by Exxon Corporation and 30.2%
     is owned by Exxon Asset Management Company.
 
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 (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%, 99.6% is owned by Exxon Financial Services
     Company Limited and .4% by Esso Eastern Inc.
(11) Dual ownership; of the 100%, 90% is owned by Exxon Rio Holding Inc. and
     10% by Exxon Sao Paulo Holding Inc.
(12) Dual ownership; of the 100%, 55% is owned by Exxon Corporation and 45% by
     Esso Holding Company Holland Inc.
(13) Dual ownership; of the 100%, 98% is owned by Societe Francaise EXXON
     CHEMICALS and 2% by Societe Paris-Niel.
 
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