Exhibit 21


UNITED STATES STEEL CORPORATION
SUBSIDIARIES AND JOINT VENTURES AS OF DECEMBER 31, 2013

Company Name
 
Chisholm Coal LLC
Chrome Deposit Corporation
Compagnie de Gestion de Mifergui- Nimba, LTEE
Cygnus Mines Limited
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
Oilfield Technologies, Inc.
Orinoco Mining Company
PITCAL, Inc.
 
USS-POSCO Industries
Perdido Land Development, Inc.
Pitcal Pipe, LLC
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
Swan Point Yacht & Country Club, Inc.
 
SPDC Hotel, LLC
 
Swan Point Development Company, Inc.
 
 
Brookfield Swan Point, LLC
Timber Wolf Land, LLC
Transtar, Inc.
 
Delray Connecting Railroad Company
 
Gary Railway Company
 
Tracks Traffic and Management Services, Inc.
 
Texas & Northern Railway Company
 
Lake Terminal Railroad Company, The
 
 
Lorain Northern Company f/k/a/ Ohio Northern Company
 
Union Railroad Company
 
Birmingham Southern Railroad Company
 
 
Fairfield Southern Company, Inc.
 
 
Warrior & Gulf Navigation LLC
U. S. Steel China, LLC
U. S. Steel Holdings, Inc.
 
U. S. Steel Holdings II, LLC
 
 


UNITED STATES STEEL CORPORATION
SUBSIDIARIES AND JOINT VENTURES AS OF DECEMBER 31, 2013
(continued)
Company Name
 


 
 
 
Worldwide Steel C.V.
 
 
 
U. S. Steel Global Holdings I B.V.
 
U. S. Steel Košice, s.r.o. (USSK)
 
 
 
 
 
OBAL-SERVIS, a.s. Košice
 
 
 
 
 
 
U. S. Steel Europe (UK) Limited
 
 
 
 
 
U. S. Steel Košice – Labortest, s.r.o.
 
 
 
 
 
U. S. Steel Services s.r.o.
 
 
 
 
 
U. S. Steel Europe - Bohemia a.s.
 
 
 
 
 
U. S. Steel Europe - France S.A.
 
 
 
 
 
U.S. Steel Košice - SBS, s.r.o.
 
 
 
 
 
U. S. Steel Europe - Germany GmbH
 
 
 
 
 
U. S. Steel Europe - Italy S.r.l.
 
 
 
 
 
RMS, a.s. Košice (prev.VULKMONT, a.s. Košice)
 
 
 
 
U. S. Steel Enterprises BV
 
U. S. Steel Global Holdings II, B.V.
 
 
 
 
U. S. Steel Canada Limited Partnership
 
 
 
 
 
U. S. Steel Canada Inc.
 
 
 
 
 
 
The Steel Company of Canada, Limited
 
 
 
 
 
 
4347226 Canada Inc.
 
 
 
 
 
 
The Stelco Plate Company Ltd.
 
 
 
 
 
 
U. S. Steel Tubular Products Canada GP Inc.
 
 
 
 
 
 
 
U. S. Steel Tubular Products Canada Limited Partnership
 
 
 
 
 
 
742784 Ontario Inc.
 
 
 
 
 
 
Baycoat Limited
 
 
 
 
 
 
Baycoat Limited Partnership (Baycoat L.P.)
 
 
 
 
 
 
D.C. Chrome Limited
 
 
U. S. Steel Serbia, BV
 
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.
 
U. S. Steel Oilwell Services, LLC
 
 
Patriot Premium Threading Services, LLC
 
U.S. Steel Produtos Tubulares do Brasil Ldta.
 
Zinklahoma, Inc.
 
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.
 
 
Lone Star Steel Holdings II, Inc.
 
 
 
Fintube (Thailand) Limited
UEC Technologies, LLC
 
Met-Chem Canada, Inc.
 
 
Met-Chem, Inc.
 
USX Engineers and Consultants
 
 


UNITED STATES STEEL CORPORATION
SUBSIDIARIES AND JOINT VENTURES AS OF DECEMBER 31, 2013
(continued)
Company Name
 


 
 
 
UEC Sail Information Technology, LTD.
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
 
Chicago Lakeside Development, LLC
USS Mine Management, Inc.
USS Oilwell Supply Co., LTD.
USS Oilwell Tubular, Inc.
USS Portfolio Delaware, Inc.
USS WSP, LLC
 
Worthington Specialty Processing
 
 
ProCoil Company, LLC
 
 
Worthington Taylor, LLC
USX International Sales Company, Inc.