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Exhibit 21.1

Name   Percent of Capital
Stock/Equity Units
Owned by
Steel Dynamics, Inc.
    Percent of Voting
Stock/Voting Units
Owned by
Steel Dynamics, Inc.
 

 
   
 
Dynamic Bar Products, LLC
  100 %   100 %
Ferrous Resources, LLC
  100 %   100 %
Iron Dynamics, Inc.
  100 %   100 %
New Millennium Building Systems, LLC
  100 %   100 %
Omni Dynamic Aviation, LLC
  50 %   50 %
Paragon Steel Enterprises, LLC
  50 %   50 %
SDI Investment Company
  100 %   100 %
STLD Holdings, Inc.
  100 %   100 %
Steel Dynamics Sales North America, Inc.
  100 %   100 %