EX-21 18 clf-2020123110xkex21.htm EX-21
Exhibit 21

SIGNIFICANT SUBSIDIARIES
CLEVELAND-CLIFFS INC. AS OF DECEMBER 31, 2020

Name | Cliffs' Effective Ownership | Place of Incorporation or Formation
Cleveland-Cliffs Burns Harbor LLC | 100% | Delaware, USA
Cleveland-Cliffs Steel Corporation | 100% | Delaware, USA
Cleveland-Cliffs Steel Holding Corporation | 100% | Delaware, USA
Cleveland-Cliffs Steel LLC | 100% | Delaware, USA
Cliffs Mining Company | 100% | Delaware, USA
Cliffs Minnesota Mining Company | 100% | Delaware, USA
Cliffs TIOP Holding, LLC | 100% | Delaware, USA
Cliffs TIOP, Inc. | 100% | Michigan, USA
Cliffs UTAC Holding LLC | 100% | Delaware, USA
IronUnits LLC | 100% | Delaware, USA
Northshore Mining Company | 100% | Delaware, USA
Cleveland-Cliffs Steel Holdings Inc. | 100% | Ohio, USA
The Cleveland-Cliffs Iron Company | 100% | Ohio, USA