Exhibit 21
SIGNIFICANT SUBSIDIARIES
CLIFFS NATURAL RESOURCES INC. AS OF DECEMBER 31, 2013
Name
Cliffs' Effective Ownership
Place of Incorporation
Cleveland-Cliffs International Holding Company
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 Asia Pacific Iron Ore Holdings Pty Ltd
100%
Australia
Cliffs Asia Pacific Iron Ore Pty Ltd
100%
Australia
Cliffs Canada Finance Inc.
100%
Ontario, Canada
Cliffs Greene B.V.
100%
The Netherlands
Cliffs Minnesota Mining Company
100%
Delaware, USA
Cliffs Natural Resources Holdings Pty Ltd
100%
Australia
Cliffs Natural Resources Luxembourg S.à r.l.
100%
Luxembourg
Cliffs Natural Resources Pty Ltd
100%
Australia
Cliffs Netherlands B.V.
100%
The Netherlands
Cliffs Quebec Iron Mining Limited
100%
Canada
Cliffs TIOP, Inc.
100%
Michigan, USA
Cliffs UTAC Holding LLC
100%
Delaware, USA
Northshore Mining Company
100%
Delaware, USA
The Bloom Lake Iron Ore Mine Limited Partnership
82.8%
Quebec, Canada
The Cleveland-Cliffs Iron Company
100%
Ohio, USA
Tilden Mining Company L.C.
85%
Michigan, USA
United Taconite LLC
100%
Delaware, USA