日韩三级片


Exhibit 21
SIGNIFICANT SUBSIDIARIES
CLEVELAND-CLIFFS INC. AS OF DECEMBER 31, 2020
NameCliffs' Effective OwnershipPlace of Incorporation or Formation
日韩三级片 Burns Harbor LLC100%Delaware, USA
日韩三级片 Steel Corporation100%Delaware, USA
日韩三级片 Steel Holding Corporation100%Delaware, USA
日韩三级片 Steel 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
日韩三级片 Steel Holdings Inc.100%Ohio, USA
The 日韩三级片 Iron Company100%Ohio, USA