EX-21 7 clf-2017123110xkex21.htm EXHIBIT 21
Exhibit 21

SIGNIFICANT SUBSIDIARIES
CLEVELAND-CLIFFS INC. AS OF DECEMBER 31, 2017

Name | Cliffs' Effective Ownership | Place of Incorporation
Cleveland-Cliffs International Holding Company | 100% | Delaware, USA
Cleveland-Cliffs Ore Corporation | 100% | Ohio, USA
Cliffs Finance US LLC | 100% | Ohio, USA
Cliffs Finance Lux SCS | 100% | Luxembourg
Cliffs (Gibraltar) Holdings Limited | 100% | Gibraltar
Cliffs (Gibraltar) Holdings Limited Luxembourg S.C.S. | 100% | Luxembourg
Cliffs (Gibraltar) Limited | 100% | Gibraltar
Cliffs Mining Company | 100% | Delaware, USA
Cliffs Minnesota Mining Company | 100% | Delaware, USA
Cliffs Natural Resources Pty Ltd. | 100% | WA Australia
Cliffs Natural Resources Holdings Pty Ltd. | 100% | WA Australia
Cliffs Natural Resources Luxembourg S.a.r.l | 100% | Luxembourg
Cliffs TIOP Holding, LLC | 100% | Delaware, USA
Cliffs TIOP, Inc. | 100% | Michigan, USA
Cliffs TIOP II, LLC | 100% | Ohio, USA
Cliffs UTAC Holding LLC | 100% | Delaware, USA
The Cleveland-Cliffs Iron Company | 100% | Ohio, USA
Tilden Mining Company L.C. | 100% | Michigan, USA
Lake Superior & Ishpeming Railroad Company | 100% | Michigan, USA
Cliffs PinnOak LLC | 100% | Ohio, USA
Cliffs Marquette, Inc. | 100% | Michigan, USA
Marquette Iron Mining Partnership | 100% | Michigan, USA
Northshore Mining Company | 100% | Michigan, USA
Pickands Hibbing Corporation | 100% | Minnesota, USA
Cliffs Pickands Holding, LLC | 100% | Delaware, USA