Exhibit 21
Subsidiaries of Cleveland-Cliffs Inc
     
    Jurisdiction of
    Incorporation or
Name of Subsidiary   Organization
     
CALipso Sales Company(3)
  Delaware
Cleveland-Cliffs Ore Corporation(1),(2)
  Ohio
Cliffs and Associates Limited(3)
  Trinidad
Cliffs Biwabik Ore Corporation(2)
  Minnesota
Cliffs Empire, Inc.(1),(6)
  Michigan
Cliffs Erie L.L.C.(8)
  Delaware
Cliffs International Management Company LLC
  Delaware
Cliffs Marquette, Inc.(1),(2)
  Michigan
Cliffs Mining Company
  Delaware
Cliffs Mining Services Company
  Delaware
Cliffs Minnesota Mining Company
  Delaware
Cliffs Natural Stone, LLC(11)
  Minnesota
Cliffs Oil Shale Corp.(2)
  Colorado
Cliffs Reduced Iron Corporation
  Delaware
Cliffs Reduced Iron Management Company(4)
  Delaware
Cliffs Sales Company
  Ohio
Cliffs Synfuel Corp.(2)
  Utah
Cliffs TIOP, Inc.(1),(5)
  Michigan
Empire Iron Mining Partnership(6)
  Michigan
Hibbing Taconite Company, a joint venture(7)
  Minnesota
IronUnits LLC
  Delaware
Lake Superior & Ishpeming Railroad Company
  Michigan
Lasco Development Corporation
  Michigan
Marquette Iron Mining Partnership(2)
  Michigan
Marquette Range Coal Services Company(5),(6)
  Michigan
Minerais Midway Ltee-Midway Ore Company Ltd.(8)
  Quebec, Canada
Northshore Mining Company
  Delaware
Pickands Hibbing Corporation(7)
  Minnesota
Republic Wetlands Preserve LLC(2)
  Michigan
Seignelay Resources, Inc.(8)
  Delaware
Silver Bay Power Company(9)
  Delaware
Syracuse Mining Company(8)
  Minnesota
The Cleveland-Cliffs Iron Company
  Ohio
The Cleveland-Cliffs Steamship Company(1)
  Delaware
Tilden Mining Company L.C.(5)
  Michigan
United Taconite LLC(12)
  Delaware
Wabush Iron Co. Limited(8),(10)
  Ohio


 

 
(1)  The named subsidiary is a wholly-owned subsidiary of The Cleveland-Cliffs Iron Company, which in turn is a wholly-owned subsidiary of Cleveland-Cliffs Inc.
 
(2)  Marquette Iron Mining Partnership (“Marquette Partnership”) is a Michigan partnership. Cleveland-Cliffs Ore Corporation and Cliffs Marquette, Inc., wholly-owned subsidiaries of The Cleveland-Cliffs Iron Company, have a combined 100% interest in the Marquette Partnership. Cleveland-Cliffs Ore Corporation also owns 100% of Cliffs Biwabik Ore Corporation. The Marquette Partnership owns 100% of Cliffs Oil Shale Corp., Cliffs Synfuel Corp. and Republic Wetlands Preserve LLC.
 
(3)  Cliffs and Associates Limited is a Trinidad corporation. Cliffs Reduced Iron Corporation has an 82.39% interest in Cliffs and Associates Limited. CALipso Sales Company is a wholly-owned subsidiary of Cliffs and Associates Limited.
 
(4)  The named subsidiary is a wholly-owned subsidiary of Cliffs Reduced Iron Corporation, which in turn is a wholly-owned subsidiary of Cleveland-Cliffs Inc.
 
(5)  Tilden Mining Company L.C. is a Michigan limited liability company. Cliffs TIOP, Inc., a wholly-owned subsidiary of The Cleveland-Cliffs Iron Company, has an 85% interest in Tilden Mining Company L.C. Tilden Mining Company L.C. has a 51% interest in Marquette Range Coal Service Company.
 
(6)  Empire Iron Mining Partnership is a Michigan partnership. The Cleveland-Cliffs Iron Company has a 79% indirect interest in the Empire Iron Mining Partnership. Empire Iron Mining Partnership has a 48.57% interest in Marquette Range Coal Service Company.
 
(7)  Cliffs Mining Company has a 10% and Pickands Hibbing Corporation, a wholly-owned subsidiary of Cliffs Mining Company, has a 13% interest in Hibbing Taconite Company, a joint venture.
 
(8)  The named subsidiary is a wholly-owned subsidiary of Cliffs Mining Company, which in turn is a wholly-owned subsidiary of Cleveland-Cliffs Inc.
 
(9)  The named subsidiary is a wholly-owned subsidiary of Northshore Mining Company, which in turn is a wholly-owned subsidiary of Cleveland-Cliffs Inc.
(10)  Wabush Iron Co. Limited is an Ohio corporation. Wabush Iron Co. Limited owns a 26.83% interest in Wabush Mines.
 
(11)  Cliffs Natural Stone, LLC is a Minnesota limited liability company. Cliffs Erie L.L.C., a wholly-owned subsidiary of Cliffs Mining Company, has a 56% interest in Cliffs Natural Stone, LLC.
 
(12)  United Taconite LLC is a Delaware limited liability company. Cliffs Minnesota Mining Company, a wholly-owned subsidiary of Cleveland-Cliffs Inc, has a 70% interest in United Taconite LLC.