Exhibit 21.1
| | | Percent of Capital
Stock/Equity Units
Owned/Voted by
Steel Dynamics, Inc. | | Percent of Capital
Stock/Equity Units
Owned/Voted by
Steel Dynamics
Subsidiary | | Percent of Capital
Stock/Equity Units
Owned/Voted by
OmniSource
Corporation | | Percent of Capital
Stock/Equity Units
Owned/Voted by
OmniSource
Subsidiary | |
| Dynamic Aviation, LLC | | 100 | % | — | | — | | — | |
* | New Millennium Building Systems, LLC | | 100 | % | — | | — | | — | |
* | OmniSource Corporation | | 100 | % | — | | — | | — | |
* | OmniSource Transport, LLC | | — | | — | | 100 | % | — | |
* | OmniSource Indianapolis, LLC | | — | | — | | 100 | % | — | |
* | Capitol City Metals, LLC | | — | | — | | — | | 100 | %(1) |
* | OmniSource Athens Division, LLC | | — | | — | | 100 | % | — | |
* | Michigan Properties Ecorse, LLC | | — | | — | | 100 | % | — | |
* | Recovery Technologies, LLC | | — | | — | | 100 | % | — | |
* | Lucky Strike Metals, LLC | | — | | — | | 100 | % | — | |
* | Speedbird Aviation, LLC | | — | | — | | 100 | % | — | |
* | Carolina Investment Company, LLC | | — | | — | | 100 | % | — | |
* | Auburn Investment Company, LLC | | — | | — | | 100 | % | — | |
* | Scientific Recycling Group, LLC | | — | | — | | 100 | % | — | |
* | Superior Aluminum Alloys, LLC | | — | | — | | 100 | % | — | |
* | OmniSource, LLC | | — | | — | | 100 | % | — | |
* | OmniSource Mexico, LLC | | — | | — | | 100 | % | — | |
* | Global Shredding Technologies, Ltd., LLC | | — | | — | | 100 | % | — | |
* | Industrial Scrap, LLC | | — | | — | | 100 | % | — | |
* | Industrial Scrap Corporation | | — | | — | | 100 | % | — | |
* | Admetco, Inc. | | — | | — | | 100 | % | — | |
* | Jackson Iron & Metal Company, Inc. | | — | | — | | 100 | % | — | |
* | OmniSource Bay City, LLC | | — | | — | | — | | 100 | %(2) |
| Paragon Steel Enterprises, LLC | | 50 | % | — | | — | | — | |
* | Roanoke Electric Steel Corporation | | 100 | % | — | | — | | — | |
* | New Millennium Building Systems, Inc. | | — | | 100 | % | — | | — | |
* | SOCAR of Ohio, Inc. | | — | | 100 | %(3) | — | | — | |
* | Shredded Products, LLC | | — | | 100 | % | — | | — | |
* | John W. Hancock, Jr. LLC | | — | | 100 | % | — | | — | |
* | Steel of West Virginia, Inc. | | — | | 100 | % | — | | — | |
* | Marshall Steel, Inc. | | — | | 100 | %(4) | — | | — | |
* | SWVA, Inc. | | — | | 100 | %(5) | — | | — | |
* | Steel Ventures, Inc. | | — | | 100 | %(5) | — | | | |
* | SDI Investment Company | | 100 | % | — | | — | | — | |
* | Shredded Products II, LLC | | 100 | % | — | | — | | — | |
* | Steel Dynamics Sales North America, Inc. | | 100 | % | — | | — | | — | |
| STLD Holdings, Inc. | | 100 | % | — | | — | | — | |
| Ferrous Resources, LLC | | — | | 100 | % | — | | — | |
| Dynamics Composites, LLC | | — | | 88 | % | — | | — | |
| Mesabi Nugget Delaware, LLC | | — | | 100 | % | — | | — | |
| Mesabi Mining, LLC | | — | | 100 | % | — | | — | |
| Indy Partners I, LLC | | — | | 100 | % | — | | — | |
| Indy Partners II, LLC | | — | | 100 | % | — | | — | |
* | The Techs Industries, Inc. | | 100 | % | — | | — | | — | |
* Subsidiary Guarantors
(1) Owned by OmniSource Indianapolis, LLC, a subsidiary of OmniSource Corporation
(2) Owned by Jackson Iron & Metal Company, Inc., a subsidiary of OmniSource Corporation
(3) Owned by New Millennium Building Systems, Inc., a subsidiary of Roanoke Electric Steel Corporation
(4) Owned by Steel of West Virginia, Inc., a subsidiary of Roanoke Electric Steel Corporation
