AG真人平台AG真人试玩


Exhibit 21
SIGNIFICANT SUBSIDIARIES
CLEVELAND-CLIFFS INC. AS OF DECEMBER 31, 2020
NameCliffs' Effective OwnershipPlace of Incorporation or Formation
Cleveland-Cliffs Burns Harbor LLC100%Delaware, USA
Cleveland-Cliffs AG真人平台AG真人试玩 Corporation100%Delaware, USA
Cleveland-Cliffs AG真人平台AG真人试玩 Holding Corporation100%Delaware, USA
Cleveland-Cliffs AG真人平台AG真人试玩 LLC100%Delaware, USA
Cliffs Mining Company100%Delaware, USA
Cliffs Minnesota Mining Company100%Delaware, USA
Cliffs TIOP Holding, LLC100%Delaware, USA
Cliffs TIOP, Inc.100%Michigan, USA
Cliffs UTAC Holding LLC100%Delaware, USA
IronUnits LLC100%Delaware, USA
Northshore Mining Company100%Delaware, USA
Cleveland-Cliffs AG真人平台AG真人试玩 Holdings Inc.100%Ohio, USA
The Cleveland-Cliffs Iron Company100%Ohio, USA