- -------------------------------------------------------------------------------- Exhibit 21 MOBIL CORPORATION Subsidiaries of the Registrant - -------------------------------------------------------------------------------- Percentage of Voting Securities Owned by Organized Immediate Level under Laws of Parent - ----- ------------- ---------- 1 Mobil Corporation ............................. Delaware Major Subsidiaries as of December 31, 1998: 2 Mobil Business Resources Corporation ....... Delaware 100.00 2 Mobil Equatorial Guinea Inc. ............... Delaware 100.00 2 Mobil Exploration and Development Venezuela Inc. ............................ Delaware 100.00 2 Mobil Exploration & Producing U.S. Inc. .... Delaware 100.00 2 Mobil Exploration and Producing North America Inc................................ Nevada 100.00 3 Mobil California Exploration & Producing Asset Company .......................... Delaware 1.50* 3 Mobil Investments Canada Inc. .............. Delaware 34.69* 4 Mobil Oil Canada, Ltd. ................. Canada 100.00 3 Mobil Oil Exploration & Producing Southeast Inc. ......................... Delaware 100.00 3 Mobil Oil Indonesia Inc. ................. Delaware 100.00 2 Mobil International Finance Corporation .... Delaware 100.00 3 Mobil Investments Inc. ................... Delaware 100.00 2 Mobil Natural Gas Inc. ..................... Delaware 100.00 2 Mobil International Petroleum Corporation .. Delaware 100.00 3 Mobil de Colombia S.A. .................... Colombia 80.07* 3 General Petroleum Company, Inc. ........... New York 100.00 4 Mobil Oil do Brazil (Industrial e Comercio) Ltda. ...................... Brazil 10.00* 4 Mobil Oil Egypt (S.A.E.) ............... Egypt .36* 3 Mobil Chemical International Ltd. ........ Delaware 100.00 3 Mobil Exploration Norway Inc. ............ Delaware 100.00 3 Mobil Oil Abu Dhabi Inc. ................. Delaware 100.00 3 Mobil Oil Aktiengesellschaft ............. Germany 10.00* 4 Mobil Erdgas-Erdoel GMBH ............... Germany 100.00 4 Mobil Marketing Und Raffinerie GMBH .... Germany 100.00 5 Mobil Beteiligungs-und Vertriebsgesellschaft MBH .......... Germany 100.00 3 Mobil Oil Cameroun ....................... Cameroun 99.98 3 Mobil Oil Company de Colombia ............ Delaware 100.00 4 Mobil de Colombia S.A. ................. Colombia .06* 3 Mobil Oil Cote d'Ivoire .................. Ivory Coast 100.00 3 Mobil Oil do Brazil (Industria e Comercio) Ltda. ........................ Brazil 90.00* 3 Mobil Oil East Africa Limited ............ Delaware 100.00 3 Mobil Oil Egypt (S.A.E.) ................. Egypt 99.28* 3 Mobil Oil Francaise ...................... France 99.98 4 Mobil Oil Maroc ........................ Morocco 12.45* 3 Mobil Oil Malaysia Sendirian Berhad ...... Malaysia 100.00 3 Mobil Oil Singapore Pte. Ltd. ............ Singapore 100.00 3 Mobil Petroleum Company Inc. ............. Delaware 100.00 (Level indicates the parent/subsidiary hierarchical relationship.) (Asterisk indicates 100% ownership held by two or more Mobil subsidiaries.) -30- - -------------------------------------------------------------------------------- Exhibit 21 MOBIL CORPORATION Subsidiaries of the Registrant - -------------------------------------------------------------------------------- Percentage of Voting Securities Owned by Organized Immediate Level under Laws of Parent - ----- ------------- ---------- 1 Mobil Corporation (continued) 2 Mobil International Petroleum Corporation (continued) 3 Mobil Petroleum Company Inc. (continued) 4 Mobil Australia Finance Company Inc. ..... Delaware 100.00 4 Mobil de Columbia S.A. ................... Columbia 16.28* 4 Mobil Europe Inc. ........................ Delaware 100.00 4 Mobil Exploration & Producing Australia Pty Ltd. ............................. Australia 100.00 5 Ampolex Limited ...................... Australia 100.00 4 Mobil Holdings (U.K.) Limited ............ Delaware 100.00 5 Mobil Holdings (Europe and Africa) Limited ............................ Delaware 100.00 6 Mobil Oil Portuguesa, LDA .......... Portugal 99.98* 5 Mobil Holdings Limited ............... United Kingdom 99.93* 6 Mobil Oil Company Limited .......... United Kingdom 100.00 7 Vacuum Oil Company Limited ....... United Kingdom 98.00* 6 Mobil Trading and Supply Limited ... United Kingdom 99.90* 6 Mobil Data Services Limited ........ United Kingdom 100.00 7 Mobil Services Company Limited ... United Kingdom .01* 6 Mobil Services Company Limited ..... United Kingdom 99.99* 7 Vacuum Oil Company Limited ....... United Kingdom 2.00* 7 Superior Oil (U.K.) Limited ...... United Kingdom .10* 7 Mobil Trading and Supply Limited . United Kingdom .10* 7 Mobil Oil Portuguesa, LDA ........ Portugal .02* 5 Mobil North Sea Limited .............. Delaware 100.00 5 Mobil Oil Hellas A.E. ................ Greece .03* 5 Superior Oil (U.K.) Limited .......... United Kingdom 99.90* 4 Mobil Holdings Benelux Inc. .............. Delaware 100.00 5 Mobil Oil B.V. ....................... The Netherlands 100.00 6 Mobil Oil, S.A. .................... Spain 100.00 5 Mobil Oil Hellas A.E. ................ Greece 99.97* 4 Mobil Marine Transportation Limited ...... Canada 100.00 5 Mobil Shipping and Transportation Company .......................... Liberia 100.00 4 Mobil Oil (Switzerland) .................. Switzerland 100.00 4 Mobil Oil Aktiengesellschaft ............. Germany 90.00* 4 Mobil Oil Australia Limited .............. Australia 100.00 5 Vacuum Oil Company Proprietary Limited .......................... Australia 100.00 6 Mobil Refining Australia Pty LTD. .. Australia 100.00 4 Mobil Oil Austria Aktiengesellschaft ..... Austria 100.00 4 Mobil Oil Egypt (S.A.E.) ................. Egypt .36* 4 Mobil Oil Hong Kong Limited .............. Hong Kong 99.90 4 Mobil Oil Kazakhstan Inc. ................ Delaware 100.00 4 Mobil Oil Maroc .......................... Morocco 87.55* (Level indicates the parent/subsidiary hierarchical relationship.) (Asterisk indicates 100% ownership held by two or more Mobil subsidiaries.) -31- - -------------------------------------------------------------------------------- Exhibit 21 MOBIL CORPORATION Subsidiaries of the Registrant - -------------------------------------------------------------------------------- Percentage of Voting Securities Owned by Organized Immediate Level under Laws of Parent - ----- ------------- ---------- 1 Mobil Corporation (concluded) 2 Mobil International Petroleum Corporation (concluded) 3 Mobil Petroleum Company Inc. (concluded) 4 Mobil Oil New Zealand Limited ........... New Zealand 100.00 4 Mobil Oil Qatar Inc ..................... Delaware 100.00 4 Mobil Oil Turk A. S ..................... Turkey 100.00 4 Mobil Producing Netherlands Inc. ........ Delaware 100.00 4 Mobil Saudi Arabia Inc. ................. Delaware 100.00 4 Mobil Sekiyu Kabushiki Kaisha ........... Japan 100.00 4 Mobil Vietnam Inc. ...................... Delaware 100.00 4 Mobil Yanbu Petrochemical Company Inc. .. Delaware 100.00 4 Mobil Yanbu Refining Company Inc. ....... Delaware 100.00 4 Mobil Petrochemical Sales and Supply Corporation ........................... Delaware 100.00 3 Mobil Petrochemicals International Limited ................................. Delaware 100.00 3 Mobil Pipe Line Company ................... Delaware 100.00 3 Mobil Plastics Europe, Inc. ............... Delaware 100.00 4 Mobil Petrochemical Holdings Co. Inc. ... Delaware 100.00 3 Mobil Sales and Supply Corporation ........ Delaware 100.00 4 Mobil Gas Liquids Trading, Inc. ......... Delaware 100.00 2 Mobil Oil Corporation ....................... New York 100.00 3 Mobil Alaska Pipeline Company ............. Delaware 100.00 3 Mobil California Exploration and Producing Asset Company ........................... Delaware 98.50* 3 Mobil Chemical Company Inc. ............... Delaware 100.00 3 Mobil Development Nigeria Inc. ............ Delaware 100.00 4 Mobil Producing Nigeria Unlimited ....... Nigeria 50.00* 3 Mobil Exploration and Producing Services Inc. ..................................... Delaware 100.00 3 Mobil Exploration Nigeria Inc. ............ Delaware 100.00 4 Mobil Producing Nigeria Unlimited ....... Nigeria 50.00* 3 Mobil Oil Credit Corporation .............. Delaware 100.00 3 Mobil Oil Nigeria Public Limited Company .. Nigeria 60.00 3 Mobil Oil Refining Corporation ............ Delaware 100.00 3 Mobil Technology Company .................. Delaware 100.00 3 Mobil Rocky Mountain Inc. ................. Delaware 100.00 4 Mobil Investments Canada Inc. ........... Delaware 65.31* 2 Mobil Produccion E Industrialization de Venezuela .................................. Delaware 100.00 2 Mobil Producing Texas & New Mexico Inc. ..... Delaware 100.00 2 Mobil Qatargas Inc. ......................... Delaware 100.00 2 The Superior Oil Company .................... Delaware 100.00 (Level indicates the parent/subsidiary hierarchical relationship.) (Asterisk indicates 100% ownership held by two or more Mobil subsidiaries.) -32-