On the Record · Steel Dynamics
Steel Dynamics subsidiaries, as it lists them
The subsidiaries Steel Dynamics lists in its latest annual report, with the jurisdiction of each, linked to the filing.
Subsidiaries it lists
| Subsidiary | Jurisdiction |
|---|---|
| Aluminum Dynamics, LLC | Indiana |
| Mesabi Nugget Delaware, LLC | Delaware |
| New Millennium Building Systems, LLC | Indiana |
| OmniSource, LLC | Indiana |
| Omni Roanoke Electric Steel Corporation | Indiana |
| SDI Biocarbon Solutions, LLC | Delaware |
| Steel Dynamics Columbus, LLC | Indiana |
| Steel Dynamics Enterprises, Inc. | Indiana |
| Steel Dynamics Heartland, LLC | Indiana |
| Steel Dynamics Sales North America, Inc. | Indiana |
| Steel Dynamics Southwest, LLC | Indiana |
| Steel of West Virginia, Inc. | Indiana |
| STLD Holdings, Inc. | Indiana |
| New Process Steel, LLC | Indiana |
| The Techs Industries, Inc. | Indiana |
| United Steel Supply, LLC | Texas |
| Vulcan Threaded Products, Inc. | Indiana |
| Vulcan Steel Products CLP Systems | — |
From Exhibit 21 of the 10-K for 2025. Companies must list their significant subsidiaries there and may leave out smaller ones, so this is the company’s own list, not every entity it owns.
Read from Steel Dynamics’s annual reports (10-K for 2025, 10-K for 2024, 10-K for 2023) and the financial data it files with the SEC, as of 2026-02-27. Every quotation is word for word from the filing linked beside it; how these pages are built and checked. The full record is in its company data sheet.