EXHIBIT 22.1

The following entities are included in the obligated group, as defined in the Quarterly Report on Form 10-Q of Cleveland-Cliffs Inc. to which this document is being filed as an exhibit, including Cleveland-Cliffs Inc., as the parent and issuer, and the subsidiary guarantors that have guaranteed the obligations under the 4.875% 2024 Senior Secured Notes, the 5.75% 2025 Senior Notes, the 6.375% 2025 Senior Notes, the 6.75% 2026 Senior Secured Notes, the 5.875% 2027 Senior Notes, the 7.00% 2027 Senior Notes and the 9.875% 2025 Senior Secured Notes issued by Cleveland-Cliffs Inc.
Exact Name of Issuer or Guarantor Subsidiary (1)
 
Reported as Issuer or Guarantor Subsidiary
  
State of
Incorporation
or Organization
  
Primary 
Standard
Industrial
Classification
Code Number
  
IRS Employer
Identification
Number
Cleveland-Cliffs Inc.
 
Issuer
 
Ohio
 
1000
 
34-1464672
AH Management, Inc.
 
(3)
 
Delaware
 
3312
 
51-0390893
AKS Investments, Inc.
 
(3)
 
Ohio
 
3312
 
31-1283531
AK Steel Corporation
 
(3)
 
Delaware
 
3312
 
31-1267098
AK Steel Holding Corporation
 
(3)
 
Delaware
 
3312
 
31-1401455
AK Steel Properties, Inc.
 
(3)
 
Delaware
 
3312
 
51-0390894
AK Tube LLC
 
(3)
 
Delaware
 
3312
 
31-1283531
Cliffs Mining Company
 
(2)
 
Delaware
 
1000
 
34-1120353
Cliffs Minnesota Mining Company
 
(2)
 
Delaware
 
1000
 
42-1609117
Cliffs TIOP Holding, LLC
 
(2)
 
Delaware
 
1000
 
47-2182060
Cliffs TIOP, Inc.
 
(2)
 
Michigan
 
1000
 
34-1371049
Cliffs TIOP II, LLC
 
(2)
 
Delaware
 
1000
 
61-1857848
Cliffs UTAC Holding LLC
 
(2)
 
Delaware
 
1000
 
26-2895214
IronUnits LLC
 
(2)
 
Delaware
 
1000
 
34-1920747
Lake Superior & Ishpeming Railroad Company
 
(2)
 
Michigan
 
1000
 
38-6005761
Mountain State Carbon, LLC
 
(3)
 
Delaware
 
3312
 
31-1267098
Northshore Mining Company
 
(2)
 
Delaware
 
1000
 
84-1116857
PPHC Holdings, LLC
 
(3)
 
Delaware
 
3312
 
31-1283531
Silver Bay Power Company
 
(2)
 
Delaware
 
1000
 
84-1126359
SNA Carbon, LLC
 
(3)
 
Delaware
 
3312
 
31-1267098
The Cleveland-Cliffs Iron Company
 
(2)
 
Ohio
 
1000
 
34-0677332
Tilden Mining Company L.C.
 
(2)
 
Michigan
 
1000
 
34-1804848
United Taconite LLC
 
(2)
 
Delaware
 
1000
 
42-1609118
 
 
 
 
 
 
 
 
 
(1) The address and phone number of each issuer and guarantor subsidiary is c/o Cleveland-Cliffs Inc., 200 Public Square, Suite 3300, Cleveland, Ohio 44114, (216) 694-5700.
(2) The entity is included as a guarantor subsidiary as of March 31, 2020 and December 31, 2019.
(3) The entity is included as a guarantor subsidiary as of March 31, 2020.