ÁñÁ«ÊÓƵ

Exhibit 21

 

The following is a list of U. S. Steel’s subsidiaries at December 31, 2003.

 

Subsidiary


   State or Country
of Incorporation


Adela Investment Company S.A.

   Luxembourg

Chrome Deposit Corporation

   Indiana

Clairton 1314B Partnership, L.P.

   Delaware

Compagnie de Gestion de Mifergui-Nimba, LTEE.

   Delaware

Cygnus Mines Limited

   Canada

Delaware ÁñÁ«ÊÓƵ Corporation

   Delaware

Delray Connecting Railroad

   Michigan

Double Eagle Steel Coating Company

   Michigan

Double G Coatings, Inc.

   Delaware

Double G Coatings Company, L.P.

   Delaware

Essex Minerals Company (Societe des Mineraux Essex)

   New Jersey

Farms Sewer Company, Inc.

   New York

Farms Water Company, Inc.

   New York

Feralloy Processing Co.

   Indiana

Grant Assurance Corporation

   Vermont

La Pointe Iron Company

   Wisconsin

New Deal Development, Inc.

   Delaware

New King Court Development Associates, LLC

   Michigan

Oilfield Technologies, Inc.

   Delaware

Olympic Laser Processing

   Michigan

Orinoco Mining Company

   Delaware

Pasadena Yacht and Country Club, Inc.

   Delaware

Perdido Land Development Co., Inc.

   Delaware

Phil Prop, Inc.

   Delaware

PITCAL, Inc.

   Delaware

ÁñÁ«ÊÓƵ-POSCO Industries

   California

ProCoil Company, LLC

   Delaware

Smart Screen Systems, Inc.

   Minnesota

Societe Des mines de Fer de Guinee Pour L’Exploitation Des Monts Nimba (Mifergui Nimba)

   Guinea

Straightline Source, Inc.

   Delaware

Straightline, Inc.

   Delaware

Swan Point Yacht & Country Club, Inc.

   Delaware


Tilden Iron Mining Company

   West Virginia

Transtar, Inc.

   Delaware

Birmingham Southern Railroad Company

   Alabama

Elgin, Joliet and Eastern Railway Company

   Delaware

Fairfield Southern Company, Inc.

   Delaware

Lake Terminal Railroad Company, The

   Delaware

McKeesport Connecting Railroad Company

   Delaware

Tracks Traffic and Management Services, Inc.

   Delaware

Union Railroad Company

   Delaware

Warrior & Gulf Navigation Company

   Delaware

Mobile River Terminal Company

   Alabama

Sisco Stevedoring, LLC

   Alabama

The Southern International Services Company, Inc.

   Alabama

The Southern International Services Company II, Inc.

   Alabama

Transtar Logistics, LLC

   Delaware

EX-IM Logistics, LLC

   Delaware

U.S. Steel International of Canada, LTD.

   Delaware

U.S. Steel Mining Company, LLC

   Alabama

ÁñÁ«ÊÓƵ Mine Management, Inc.

   Alabama

United States Steel International, Inc.

   New Jersey

Compania de Representaciones Mercantiles, Cubacero, S.A.

   Cuba

United States Steel Export Company de Mexico, S.R.L. de C.V.

   Mexico

Acero Prime, S.R.L. de C.V.

   Mexico

United States Steel International de Mexico, S.R.L. de C.V.

   Mexico

U. S. Steel Receivables, LLC

   Delaware

U. S. Steel Timber Company, LLC

   Alabama

ÁñÁ«ÊÓƵ Coal Sales, LLC

   Delaware

ÁñÁ«ÊÓƵ Galvanizing, Inc.

   Delaware

PRO-TEC Coating Company

   Ohio

PRO-TEC Coating Company, Inc.

   Ohio

ÁñÁ«ÊÓƵ International Services, LLC

   Delaware

ÁñÁ«ÊÓƵ Oilwell Supply Co., LTD.

   Delaware

ÁñÁ«ÊÓƵ Oilwell Tubular, Inc.

   Delaware

ÁñÁ«ÊÓƵ Portfolio Delaware, Inc.

   Delaware

ÁñÁ«ÊÓƵ Tubular Processing, Inc.

   Delaware

U. S. Steel Holdings, Inc.

   Delaware

ÁñÁ«ÊÓƵ Global Holdings I, B.V.

   Netherlands

U. S. Steel Kosice (ÁñÁ«ÊÓƵK)

   Slovakia

Elektroservis VN a VVN a.s. Kosice

   Slovakia


Energoservis a.s. Kosice

   Slovakia

Hutnictvi zeleza (Czech Republic)

   Czech Republic

International Trade Center a.s.

   Slovakia

NV Promet SA (Belgium)

   Belgium

SZ Stahl GmbH (Germany)

   Germany

Waltzwerke Finow GmbH

   Germany

Betrieber Gesellschaft Nordbahn GmbH

   Germany

Stawa Stahlbau GmbH

   Germany

Vozmult a.s. Kosice

   Slovakia

VSZ (U.K.) Ltd. (United Kingdom)

   United Kingdom

Vulkmont a.s. Kosice

   Slovakia

U. S. Steel Global Holdings II, B.V.

   Netherlands

U. S. Steel Serbia, B.V.

   Netherlands

Sartid, a.d.

   Serbia

Sartid Beli Limovi, a.d.

   Serbia

Luka Smedervo d.o.o.

   Serbia

Veljko Dugosevic d.o.o. Kucevo

   Serbia

Spin d.o.o.

   Serbia

Slobodna Zona Smederevo

   Serbia

Stara Zelezara d.o.o. Smederevo

   Serbia

U. S. Steel Balkan, d.o.o.

   Serbia

U. S. Steel Holdings III, Inc.

   Delaware

U. S. Steel Poland, B.V.

   Netherlands

U. S. Steel Europe, B.V.

   Netherlands

USX Credit Corp. – California

   Delaware

UEC Technologies, LLC

   Pennsylvania

Met-Chem Canada Inc.

   Canada

UEC Sail Information Technology, LTD.

   India

USX Engineers and Consultants, Inc.

   Delaware

USX International Sales Company, Inc.

   Barbados

USX Participacoes LTDA.

   Brazil

Merinds Mineracao

   Brazil

Mineracao Carajas, LTDA.

   Brazil

Mineracao Maraba, LTDA.

   Brazil

USX RTI Holdings, Inc.

   Delaware

Republic Technologies International Holdings LLC

   Delaware

Republic Technologies International LLC

   Delaware

Worthington Specialty Processing

   Missouri