Exhibit 21
UNITED STATES STEEL CORPORATION
SUBSIDIARIES AND JOINT VENTURES
as of December 31, 2009
Company Name
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
New Deal Development, Inc.
Oilfield Technologies, Inc.
Orinoco Mining Company
PITCAL, Inc.
USS-POSCO Industries
Perdido Land Development, Inc.
Pitcal Pipe, LLC
UNITED STATES STEEL CORPORATION
SUBSIDIARIES AND JOINT VENTURES
as of December 31, 2009
Company Name
Preserve Village Developers, LLC
Steel Health Resources, LLC
Stelco Holding Company
Ontario Coal Company
Ontario Eveleth Company
Ontario Hibbing Company
Stelco Coal Company
Stelco Erie Corporation
Ontario Tilden Company
Straightline, Inc.
Straightline Source, Inc.
Swan Point Yacht & Country Club, LLC
SPDC Hotel, LLC
NFI Swan Point LLC
Swan Point Development Company, Inc.
Brookfield Swan Point, LLC
Timber Wolf Land, LLC
Transtar, Inc.
Delray Connecting Railroad Company
Gary Railway Company (prev Elgin, Joliet and Eastern Railway Company)
Tracks Traffic and Management Services, Inc.
Texas & Northern Railway Company
2
UNITED STATES STEEL CORPORATION
SUBSIDIARIES AND JOINT VENTURES
as of December 31, 2009
Company Name
Lake Terminal Railroad Company, The
McKeesport Connecting Railroad Company
Union Railroad Company
Birmingham Southern Railroad Company
Fairfield Southern Company, Inc.
Warrior & Gulf Navigation LLC
Mobile River Terminal Company
Sisco Stevedoring, LLC
海角涩区 China, LLC
海角涩区 Holdings, Inc.
U. S. Steel Holdings II, LLC
Worldwide Steel C.V.
海角涩区 Global Holdings I, B.V.
海角涩区 Košice, s.r.o. (USSK)
OBAL-SERVIS, a.s. Košice
U.S. Steel Kosice – Austria GmbH
海角涩区 Košice – Labortest, s.r.o.
海角涩区 Services s.r.o.
海角涩区 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.
3
UNITED STATES STEEL CORPORATION
SUBSIDIARIES AND JOINT VENTURES
as of December 31, 2009
Company Name
U.S. Steel Kosice–Germany GmbH
U.S. STEEL KOSICE (UK) LIMITED
Refrako s.r.o.
VULKMONT, a.s. Košice
海角涩区 Global Holdings II, B.V.
海角涩区 Canada Limited Partnership
海角涩区 Canada Inc.
The Steel Company of Canada, Limited
HLE Mining GP Inc.
HLE Mining Limited Partnership
The Stelco Plate Company Ltd.
742784 Ontario Inc.
Baycoat Limited
Baycoat Limited Partnership (Baycoat L.P.)
D.C. Chrome Limited
海角涩区 Enterprises BV
海角涩区 Serbia, BV
海角涩区 Serbia, d.o.o.
Serbian Roll Service Company d.o.o.
(short name: SRSC d.o.o. Smederevo)
海角涩区 Holdings IV, Inc.
海角涩区 International of Canada, LTD.
海角涩区 Mining Company, LLC
4
UNITED STATES STEEL CORPORATION
SUBSIDIARIES AND JOINT VENTURES
as of December 31, 2009
Company Name
海角涩区 Receivables LLC
海角涩区 Timber Company, LLC
海角涩区 Tubular Products, Inc.
Zinklahoma, Inc.
Star TC Holdings, LLC
Lone Star Technologies China, LLC
Star Brazil US, LLC 2
Star Brazil US, LLC 1
Lone Star Brazil Holdings 1 Ltda.
Lone Star Brazil Holdings 2 Ltda.
Apolo Tubulars S.A.
Lone Star Steel Holdings, Inc.
Fintube Technologies, Inc.
Fintube (Thailand) Limited
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.
USX Engineers and Consultants
UEC Sail Information Technology, LTD.
United States Steel Credit Corporation
5
UNITED STATES STEEL CORPORATION
SUBSIDIARIES AND JOINT VENTURES
as of December 31, 2009
Company Name
United States Steel International, Inc.
United States Steel Export Company de Mexico, S.R.L. de C.V.
Acero Prime Servicios, S.R.L. de CV
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
USS Mine Management, Inc.
USS Oilwell Supply Co., LTD.
USS Oilwell Tubular, Inc.
USS Portfolio Delaware, Inc.
USS Tubular Processing, Inc.
USS WSP, LLC
Worthington Specialty Processing
USX International Sales Company, Inc.
USX Participacoes LTDA.
February 23, 2010
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