EX-21 3 clf-2024123110xkex21.htm EX-21
EXHIBIT 21

CLEVELAND-CLIFFS INC.
SUBSIDIARIES
AS OF DECEMBER 31, 2024

Name |  | Place of Incorporation or Organization
Cannon Automotive Solutions - Bowling Green, Inc. |  | Delaware
Cleveland-Cliffs Burns Harbor LLC |  | Delaware
Cleveland-Cliffs Cleveland Works LLC |  | Delaware
Cleveland-Cliffs Columbus LLC |  | Delaware
Cleveland-Cliffs FPT Services Company |  | Ohio
Cleveland-Cliffs Investments Inc. |  | Ohio
Cleveland-Cliffs Minorca Mine Inc. |  | Delaware
Cleveland-Cliffs Monessen Coke LLC |  | Delaware
Cleveland-Cliffs New Carlisle LLC |  | Delaware
Cleveland-Cliffs Plate LLC |  | Delaware
Cleveland-Cliffs Railways Inc. |  | Delaware
Cleveland-Cliffs Riverdale LLC |  | Delaware
Cleveland-Cliffs Services Holding Company |  | Ohio
Cleveland-Cliffs South Chicago & Indiana Harbor Railway Inc. |  | Delaware
Cleveland-Cliffs Steel Corporation |  | Delaware
Cleveland-Cliffs Steel Holding Corporation |  | Delaware
Cleveland-Cliffs Steel Holdings Inc. |  | Ohio
Cleveland-Cliffs Steel LLC |  | Delaware
Cleveland-Cliffs Steel Management Inc. |  | Delaware
Cleveland-Cliffs Steel Properties Inc. |  | Delaware
Cleveland-Cliffs Steelton LLC |  | Delaware
Cleveland-Cliffs Steelworks Railway Inc. |  | Delaware
Cleveland-Cliffs Tooling and Stamping Company |  | Delaware
Cleveland-Cliffs Tooling and Stamping Holdings LLC |  | Delaware
Cleveland-Cliffs Tubular Components LLC |  | Delaware
Cleveland-Cliffs Weirton LLC |  | Delaware
Cliffs Mining Company |  | Delaware
Cliffs Minnesota Mining Company |  | Delaware
Cliffs Steel Inc. |  | Ohio
Cliffs TIOP Holding, LLC |  | Delaware
Cliffs TIOP, Inc. |  | Michigan
Cliffs TIOP II, LLC |  | Delaware
Cliffs UTAC Holding LLC |  | Delaware
Ferrous Processing and Trading Company |  | Michigan
Fleetwood Metal Industries, LLC |  | Delaware
FPT - Schlafer Division L.L.C. |  | Michigan
FPT Cleveland, LLC |  | Michigan
FPT Florida, LLC |  | Michigan
IronUnits LLC |  | Delaware
Koil Metals L.L.C. |  | Michigan
Lake Superior & Ishpeming Railroad Company |  | Michigan
Lonyo Land L.L.C. |  | Michigan

Name |  | Place of Incorporation or Organization
Metallics Sales Company |  | Delaware
Mid-Vol Coal Sales, Inc. |  | West Virginia
Mountain State Carbon, LLC |  | Delaware
Northshore Mining Company |  | Delaware
Silver Bay Power Company |  | Delaware
SLC Acquisition L.L.C. |  | Michigan
SNA Carbon, LLC |  | Delaware
Stelco Inc. |  | Canada
The Cleveland-Cliffs Iron Company |  | Ohio
Tilden Mining Company L.C. |  | Michigan
United Taconite LLC |  | Delaware