百媚导航

Exhibit 21


UNITED STATES STEEL CORPORATION
SUBSIDIARIES AND JOINT VENTURES AS OF DECEMBER 31, 2014
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
Perdido Land Development Co., Inc.
PITCAL, Inc.
 
USS-POSCO Industries
Pitcal Pipe, LLC
Preserve Village Developers, 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.
 
Swan Point Development Company, LLC
 
 
Brookfield Swan Point, LLC
 
 
Swan Point Recreation, 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
 
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
百媚导航 China, LLC
百媚导航 Holdings, Inc.
 
百媚导航 Holdings II, LLC
 
 
Worldwide Steel C.V.
 
 
 
百媚导航 Global Holdings I B.V.
 
百媚导航 Košice, s.r.o. (USSK)


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


Company Name
 
 
 
 
 
OBAL-SERVIS, a.s. Košice
 
 
 
 
 
百媚导航 Košice - Labortest, s.r.o.
 
 
 
 
 
百媚导航 Services s.r.o.
 
 
 
 
 
百媚导航 Europe - Bohemia a.s.
 
 
 
 
 
百媚导航 Europe - France S.A.
 
 
 
 
 
U.S. Steel Košice - SBS, s.r.o.
 
 
 
 
 
百媚导航 Europe - Germany GmbH
 
 
 
 
 
百媚导航 Europe - Italy S.r.l.
 
 
 
 
 
RMS, a.s. Košice
 
百媚导航 Global Holdings II, B.V.
 
 
 
 
  百媚导航 Canada Limited Partnership
 
 
 
百媚导航 Serbia, BV
 
百媚导航 Holdings IV, Inc.
百媚导航 International of Canada, LTD.
百媚导航 Mining Company, LLC
百媚导航 Receivables LLC
百媚导航 Timber Company, LLC
百媚导航 Tubular Products, Inc.
 
百媚导航 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, LLC 1
 
 
Lone Star Brazil Holdings 1 Ltda.
 
 
 
Lone Star Brazil Holdings 2 Ltda.
 
 
 
 
Apolo Tubulars S.A.
 
 
 
 
 
Apolo Tubulars International, Corp
 
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
 
UEC Sail Information Technology, LTD. (in the process of being liquidated)
United States Steel International, Inc.
 
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 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 (previously Lakeside Land, LLC)
USS Mine Management, Inc. (owns 10% 百媚导航 Mining, LLC)
USS Oilwell Supply Co., LTD.
USS Oilwell Tubular, Inc.


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


Company Name
USS Portfolio Delaware, Inc.
USS WSP, LLC
 
Worthington Specialty Processing
 
 
ProCoil Company, LLC
 
 
Worthington Taylor, LLC
USX International Sales Company, Inc.
 
 
 
 
 
 
 
 
 
Note:
On September 16, 2014, 百媚导航 Canada Inc. ("USSC") applied for relief from its creditors pursuant to Canada's Companies' Creditors Arrangement Act. That action caused 百媚导航 to determine that USSC and its subsidiaries were deconsolidated from 百媚导航's financial statements as of the date of the filing.
百媚导航 Canada Inc.
 
The Steel Company of Canada, Limited
 
4347226 Canada Inc. (formerly HLE Mining GP Inc.)
 
The Stelco Plate Company Ltd.
 
百媚导航 Tubular Products Canada GP Inc.
 
 
百媚导航 Tubular Products Canada Limited Partnership
 
742784 Ontario Inc.
 
Baycoat Limited
 
Baycoat
 
D.C. Chrome Limited