Exhibit 21

SUBSIDIARIES AND AFFILIATES OF

CLIFFS NATURAL RESOURCES INC. AS OF DECEMBER 31, 2011

(This list contains subsidiaries and affiliates of Cliffs where Cliffs directly or indirectly owns at

least 20% of the entity as of 12/31/2011)

 

Name

  Cliffs’
Effective
Ownership
   

Place of Incorporation

Cliffs Natural Resources Inc.

    Ohio, USA

2274659 Ontario Inc.

    100   Ontario, Canada

7685874 Canada Inc.

    100   Quebec, Canada

9223-0945 Québec Inc.

    100   Québec, Canada

Anglo Ferrous Amapá Mineração Ltda.

    30   Brazil

Anglo Ferrous Logística Amapá Ltda.

    30   Brazil

Arnaud Railway Company

    100   Quebec, Canada

AusQuest IOCG Joint Venture

    70   Australia

AusQuest Limited

    30   WA Australia

Barcomba Joint Venture (unincorporated JV)

    50   WA Australia

Beard Pinnacle, LLC

    100   Oklahoma, USA

Bloom Lake General Partner Limited

    75   Ontario, Canada

Bloom Lake Railway Company Limited

    100   Newfoundland, Canada

CALipso Sales Company

    82.4   Delaware, USA

Cleveland-Cliffs International Holding Company

    100   Delaware, USA

Cleveland-Cliffs Ore Corporation

    100   Ohio, USA

CLF PinnOak LLC

    100   Delaware, USA

Cliffs (Gibraltar) Holdings Limited

    100   Gibraltar

Cliffs (Gibraltar) Holdings Limited Luxembourg S.C.S.

    100   Luxembourg

Cliffs (Gibraltar) Limited

    100   Gibraltar

Cliffs (US) Mather I LLC

    100   Delaware, USA

Cliffs and Associates Limited

    82.4   Trinidad

Cliffs Asia Pacific Iron Ore Finance Pty Ltd

    100   WA Australia

Cliffs Asia Pacific Iron Ore Holdings Pty Ltd (fka Portman Limited)

    100   WA Australia

Cliffs Asia Pacific Iron Ore Investments Pty Ltd

    100   QLD Australia

Cliffs Asia Pacific Iron Ore Management Pty Ltd

    100   NSW Australia

Cliffs Asia Pacific Iron Ore Pty Ltd (fka Portman Iron Ore Limited)

    100   NSW Australia

Cliffs Australia Coal Pty Ltd

    100   QLD Australia

Cliffs Australia Holdings Pty Ltd

    100   QLD Australia

Cliffs Australia Washplant Operations Pty Ltd

    100   QLD Australia

Cliffs Biwabik Ore Corporation

    100   Minnesota, USA

Cliffs Brown B.V.

    100   The Netherlands

Cliffs Canada Chromite Land ULC

    100   British Columbia, Canada

Cliffs Canadian Shared Services Inc.

    100   Ontario, Canada

Cliffs Chromite Far North Inc. (fka Spider Resources Inc.)

    100   Ontario, Canada

Cliffs Chromite Ontario Inc. (fka Freewest Resources Canada Inc.)

    100   Quebec, Canada

Cliffs Empire, Inc.

    100   Michigan, USA

Cliffs Erie L.L.C.

    100   Delaware, USA

Cliffs Exploration Holdings Company

    100   Delaware, USA

Cliffs Exploraciones Peru S.A.C.

    100   Peru

Cliffs Greene B.V.

    100   The Netherlands

Cliffs Harrison B.V.

    100   The Netherlands

Cliffs International Lux I S.à r.l.

    100   Luxembourg

Cliffs International Lux II S.à r.l.

    100   Luxembourg


Name

  Cliffs’
Effective
Ownership
   

Place of Incorporation

Cliffs International Lux IV S.à r.l. (In Liquidation)

    100   Luxembourg

Cliffs International Luxembourg S.à r.l.

    100   Luxembourg

Cliffs International Management Company LLC

    100   Delaware, USA

Cliffs International Mineraçâo Brasil Ltda.

    100   Brazil

Cliffs International Participacoes Brasil Ltd.

    100   Brazil

Cliffs Logan County Coal, LLC (fka INR-WV Operating, LLC)

    100   Delaware, USA

Cliffs Logan County Coal Terminals, LLC (fka INR Terminals, LLC)

    100   Delaware, USA

Cliffs Logan County Holdings, LLC (fka INR-1 Holdings, LLC)

    100   Delaware, USA

Cliffs Magnetite Holdings Pty Ltd.

    100   WA Australia

Cliffs Marquette, Inc.

    100   Michigan, USA

Cliffs Minera Peru S.A.C.

    100   Peru

Cliffs Mineração Ltda.

    100   Brazil

Cliffs Mining Company (fka Pickands Mather & Co.)

    100   Delaware, USA

Cliffs Mining Services Company

    100   Delaware, USA

Cliffs Minnesota Mining Company

    100   Delaware, USA

Cliffs Natural Gas Company

    100   Delaware, USA

Cliffs Natural Resources Exploration Argentina S.R.L.

    100   Republic of Argentina

Cliffs Natural Resources Exploration Argentina II S.R.L.

    100   Republic of Argentina

Cliffs Natural Resources Exploration B.V.

    100   Netherlands

Cliffs Natural Resources Exploration Canada Inc.

    100   Ontario, Canada

Cliffs Natural Resources Exploration Chile Limitada.

    100   Chile

Cliffs Natural Resources Exploration Inc.

    100   Delaware, USA

Cliffs Natural Resources Holdings Pty Ltd

    100   WA Australia

Cliffs Natural Resources Luxembourg S.à r.l.

    100   Luxembourg

Cliffs Natural Resources Pty Ltd (fka Cliffs Asia-Pacific Pty Limited)

    100   WA Australia

Cliffs Netherlands B.V.

    100   The Netherlands

Cliffs North American Coal LLC (fka PinnOak Resources, LLC)

    100   Delaware, USA

Cliffs Oil Shale Corp.

    100   Colorado, USA

Cliffs Quebec Iron Mining Limited (fka Consolidated Thompson Iron Mines Limited)

    100   Quebec, Canada

Cliffs Reduced Iron Corporation

    100   Delaware, USA

Cliffs Reduced Iron Management Company

    100   Delaware, USA

Cliffs Renewable Energies LLC

    100   Delaware, USA

Cliffs Sales Company (fka Northshore Sales Company)

    100   Ohio, USA

Cliffs Scovil B.V.

    100   The Netherlands

Cliffs Sterling B.V.

    100   The Netherlands

Cliffs Subscription LLC

    100   Delaware, USA

Cliffs Technical Products LLC

    100   Delaware, USA

Cliffs TIOP, Inc. (fka Cliffs MC Empire, Inc.)

    100   Michigan, USA

Cliffs UTAC Holding LLC

    100   Delaware, USA

Cliffs West Virginia Coal, Inc.

    100   Delaware, USA

CNR Exploration Mexico S. de R.L. de C.V.

    100   Mexico

CNREM LLC

    100   Mongolia

Cockatoo Island Holdings Pty Ltd

    100   NSW Australia

Cockatoo Iron Ore Joint Venture (unincorporated JV)

    50   SA Australia

Cockatoo Mining Pty Ltd

    50   WA Australia

Currawong Coal Pty Ltd

    50   NSW Australia

Empire Iron Mining Partnership

    79   Michigan, USA

Emerald Joint Venture (unincorporated JV)

    50   WA Australia

Hibbing Development Company

    39   Minnesota, USA

Hibbing Taconite Company

    23   Minnesota, USA


Name

  Cliffs’
Effective
Ownership
   

Place of Incorporation

IronUnits LLC

    100   Delaware, USA

Knoll Lake Minerals Limited

    58.3   Canada

Koolyanobbing Iron Pty Ltd

    100   WA Australia

Lake Superior & Ishpeming Railroad Company

    100   Michigan, USA

MABCO Steam Company, LLC

    40.467   Delaware, USA

Marquette Iron Mining Partnership

    100   Michigan, USA

Marquette Range Coal Service Company

    82.086   Michigan, USA

Maryborough Joint Venture (unincorporated JV)

    50   WA Australia

Michigan Iron Nugget LLC

    50   Delaware, USA

Minerais Midway Ltee

    100   Quebec, Canada

Mt. Finnerty Joint Venture

    80   WA Australia

Minera Cerro Juncal S.A.

    100   Republic of Argentina

Mount Inglis Joint Venture (unincorporated JV)

    50   WA Australia

Northern Conservation, LLC

    100   Minnesota, USA

Northern Land Company Limited

    50   Newfoundland, Canada

Northshore Mining Company

    100   Delaware, USA

Oak Grove Land Company, LLC

    100   Delaware, USA

Oak Grove Resources, LLC

    100   Delaware, USA

Pickands Hibbing Corporation

    100   Minnesota, USA

Pinnacle Land Company, LLC

    100   Delaware, USA

Pinnacle Mining Company, LLC

    100   Delaware, USA

PinnOak Coal Sales, LLC

    100   Delaware, USA

Portman Coal Investments Pty Ltd

    100   WA Australia

Portman Iron Ore Limited (fka Esperance Iron Limited)

    100   WA Australia

Portman Limited (fka Pelsoil Limited)

    100   Australia

Portman Mining Limited

    100   NA Australia

Quinto Mining Corporation

    100   Quebec, Canada

Renewafuel, LLC

    94.5554   Minnesota, USA

Republic Wetlands Preserve LLC

    100   Michigan, USA

Rockport Mining Corporation

    100   New Brunswick, Canada

Seignelay Resources, Inc. (fka Angola Services Corporation)

    100   Delaware, USA

Silver Bay Power Company

    100   Delaware, USA

Sonoma Mine Management Pty Ltd

    45   QLD Australia

Southern Eagle Land, LLC

    100   Delaware, USA

Springleigh Joint Venture (unincorporated JV)

    50   WA Australia

St Lawrence Joint Venture (unincorporated JV)

    50   WA Australia

Syracuse Mining Company

    100   Minnesota, USA

The Bloom Lake Iron Ore Mine Limited Partnership

    75   Quebec, Canada

The Cleveland-Cliffs Iron Company

    100   Ohio, USA

The Cleveland-Cliffs Steamship Company

    100   Delaware, USA

Tilden Mining Company L.C.

    85   Michigan, USA

Twin Falls Power Corporation Limited

    25.89   Canada

Toney’s Fork Land, LLC

    100   Delaware, USA

United Taconite LLC

    100   Delaware, USA

Universal Resources LLC

    20   Mongolia

Wabush Iron Co. Limited

    100   Ohio, USA

Wabush Lake Railway Company, Limited

    100   Newfoundland, Canada

Wabush Mines (unincorporated JV)

    100   Newfoundland, Canada

Wabush Resources Inc.

    100   Ontario, Canada