Exhibit 21

UNITED STATES STEEL CORPORATION

SUBSIDIARIES AND JOINT VENTURES

as of December 31, 2008

 

Company Name

    
Adela Investment Company, S.A.   
Chisholm Coal LLC   
Chrome Deposit Corporation   
Compagnie de Gestion de Mifergui- Nimba,LTEE   
Cygnus Mines Limited   
Delaware USS Corporation   
Double Eagle Steel Coating Company   
Double G Coatings, Inc.   
Double G Coatings Company, L.P.   
Essex Minerals Company   
Feralloy Processing Company   
GCW/USS Energy, LLC   
Grant Assurance Corporation   
Kanawha Coal LLC   
Lakeside Land, LLC   
La Pointe Iron Company   
New Deal Development, Inc.   
Oilfield Technologies, Inc.   
Orinoco Mining Company   
PITCAL, Inc.   
USS-POSCO Industries   
Perdido Land Development, Inc.   
Pitcal Pipe, LLC   
United Spiral Pipe, LLC   
Preserve Village Developers, LLC   
Smart Screen Systems, Inc.   
Societe Des mines de Fer de Guinee Pour L’Exploitation Des Monts Nimba
Steel Health Resources, LLC   
Stelco Holding Company   
Ontario Coal Company   
Ontario Eveleth Company   
Ontario Hibbing Company   
Hibbing Development Company   
Hibbing Taconite Company   
Stelco Coal Company   


UNITED STATES STEEL CORPORATION

SUBSIDIARIES AND JOINT VENTURES

as of December 31, 2008 (continued)

 

Company Name

    
Stelco Erie Corporation   
Ontario Tilden Company   
Tilden Mining Company, L.C.   
Marquette Range Coal Service Company   
Mittal Steel USA - Ontario Iron Inc. (prev. Ontario Iron Co.)
Beckley Coal Co.   
Mathies Coal Co. (PA)   
Straightline, Inc.   
Straightline Source, Inc.   
Swan Point Yacht & Country Club, LLC   
SPDC Hotel, LLC   
Swan Point Development Company, Inc.   
Brookfield Swan Point, LLC   
The Steel Company of Canada, Limited   
Timber Wolf Land, LLC   
Transtar, Inc.   
Fairfield Southern Company, Inc.   
Delray Connecting Railroad Company   
Elgin, Joliet and Eastern Railway Company   
EJ&E West Company (See Note 1)   
Tracks Traffic and Management Services, Inc.   
Texas & Northern Railway Company   
Lake Terminal Railroad Company, The   
McKeesport Connecting Railroad Company   
Union Railroad Company   
Birmingham Southern Railroad Company   
Warrior & Gulf Navigation LLC   
Mobile River Terminal Company   
Sisco Stevedoring, LLC   
U. S. Steel Canada Inc.   
HLE Mining GP Inc.   
HLE Mining Limited Partnership   
Wabush Mines (Quebec)   
Arnaud Railway Company (Quebec)   
Wabush Lake Railway Company Ltd. (Alta)   
Knoll Lake Minerals Limited   

 

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UNITED STATES STEEL CORPORATION

SUBSIDIARIES AND JOINT VENTURES

as of December 31, 2008 (continued)

 

Company Name

    
Northern Land Company Limited   
Twin Falls Power Corporation Limited   
The Stelco Plate Company Ltd.   
742784 Ontario Inc.   
Baycoat Limited   
Baycoat Limited Partnership (Baycoat L.P.)   
Z-Line Company   
D.C. Chrome Limited   
4501039 Canada Inc. (prev. Lake Erie Slab Company Inc.)(See Note 2)
U. S. Steel China, LLC   
U. S. Steel Holdings, Inc.   
U. S. Steel Holdings II, LLC   
Worldwide Steel C.V.   
U. S. Steel Europe, B.V.   
U. S. Steel Global Holdings I, B.V.   
U. S. Steel Košice, s.r.o. (USSK)   
Obal-Servis, a.s. Košice   
Stabilita d.d.s., a.s.   
U. S. Steel Kosice – Austria GmbH   
Hutnictvi železa, a.s.   
U. S. Steel Košice – Labortest, s.r.o.   
U. S. Steel Services s.r.o.   
U. S. Seel Kosice – Belgium S.A.   
U. S. Steel Košice - Bohemia a.s.   
U. S. Steel Kosice - France S.A.   
U. S. Steel Košice - SBS, s.r.o.   
U. S. Steel Kosice - Germany GmbH   
U. S. Steel Kosice (UK) LIMITED   
Refrako, s.r.o.   
Reliningserv, s.r.o.   
Vulkmont a.s. Košice   
U. S. Steel Canada Limited Partnership   
U. S. Steel Global Holdings II, B.V.   
U. S. Steel Enterprises BV   
U. S. Steel Serbia, BV   
U. S. Steel Serbia, d.o.o.   

 

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UNITED STATES STEEL CORPORATION

SUBSIDIARIES AND JOINT VENTURES

as of December 31, 2008 (continued)

 

Company Name

    

Serbian Roll Service Company d.o.o.

(short name: SRSC d.o.o. Smederevo)

U. S. Steel Holdings IV, Inc.   
U. S. Steel International of Canada, LTD.   
U. S. Steel Mining Company, LLC   
U. S. Steel Receivables LLC   
U. S. Steel Timber Company, LLC   
U. S. Steel Tubular Products, Inc.   

Star Capital Funding, LLC

(prev. Star Capital Funding, Inc.)

  
Zinklahoma, Inc.   
Star International Holdings Ltd.   
Star China Ltd.   
Star TC Holdings, LLC   
Lone Star Technologies China, LLC   
Star Brazil US, LLC 2   
Star Brazil US, LLC1   
Lone Star Brazil Holdings 1 Ltda.   
Lone Star Brazil Holdings 2 Ltda.   
Apolo Tubulars S.A.   
Lone Star Steel Holdings, Inc.   
Fintube (Thailand) Limited   
Fintube Technologies, Inc.   
Fintube Canada, Inc.   
Aletas Y Birlos SA, De C.V.   
Aletas Y Birlos Mexicana SA, De C.V.   
UEC Technologies, LLC   
Met-Chem Canada, Inc.   
Met-Chem, Inc.   
UEC Sail Information Technology, LTD.   
USX Engineers and Consultants   
United States Steel Credit Corporation   
United States Steel Export Company de Mexico, S.R.L. de C.V.   
Acero Prime, S.R.L. de CV   
Acero Prime Servicios, S.R.L. de CV   
United States Steel International, Inc.   

 

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UNITED STATES STEEL CORPORATION

SUBSIDIARIES AND JOINT VENTURES

as of December 31, 2008 (continued)

 

Company Name

    
United States Steel International de Mexico, S.R.L. de C. V.
USS Galvanizing, Inc.   
PRO-TEC Coating Company
PRO-TEC Coating Company, Inc.
USS International Services, LLC   
USS Lakeside, LLC   
Chicago Lakeside Development, LLC

USS Mine Management, Inc.

(owns 10% U. S. Steel Mining, LLC)

  
USS Oilwell Supply Co., LTD.   
USS Oilwell Tubular, Inc.   
USS Portfolio Delaware, Inc.   
USS Tubular Processing, Inc.   
USS WSP, LLC   
Worthington Specialty Processing
ProCoil Company, LLC
Worthington Taylor, LLC
USX International Sales Company, Inc.   
USX Participacoes LTDA.   
Merinds Mineracao   
Mineracao Carajas, LTDA.   
Mineracao Maraba, LTDA.   

 

Note:

 

(1) EJ&E West Company was sold on January 31, 2009

 

(2) As of January 1, 2009, 4501039 Canada Inc. no longer exists. It was amalgamated with U. S. Steel Canada Inc on January 1, 2009.

February 18, 2009

 

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