| NSNelsen Steel Company | Franklin Park | IL | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| NLNiagara LaSalle Corporation | Warren | MI | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| NLNiagara LaSalle - South Holland Plant | South Holland | IL | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| NANORTH AMERICAN STAINLESS-Minooka | Minooka | IL | Primary Metal Manufacturing331221 | 1-19 | ◐ LIKELY ACTIVE |
| NANORTH AMERICAN STAINLESS-Pendergrass | Pendergrass | GA | Primary Metal Manufacturing331221 | 1-19 | ◐ LIKELY ACTIVE |
| NANORTH AMERICAN STAINLESS-Wrightsville | Whrightsville | PA | Primary Metal Manufacturing331221 | 1-19 | ◐ LIKELY ACTIVE |
| NNucor | Auburn | NY | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| NCNucor Cold Finish | Brigham City | UT | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| NSNucor Skyline | Camp Hill | PA | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| NSNucor Skyline Cartersville | Cartersville | GA | Primary Metal Manufacturing331221 | 1-19 | ◐ LIKELY ACTIVE |
| OOhio | North Jackson | OH | Primary Metal Manufacturing331221 | 1-19 | ◐ LIKELY ACTIVE |
| OSOhio-Kentucky Steel, LLC | Toledo | OH | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| PSPeninsula Steel Inc | Plant City | FL | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| PMPhillips Manufacturing Niles | Niles | OH | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| PMPhillips Manufacturing Umatilla | Umatilla | FL | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| P2Plant 27 - SteelCon/Orlando | Orlando | FL | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| PMPremium Metals, Inc. | Cleveland | OH | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| RMRepublic Manufacturing | Dallas | TX | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| RSRiverside Steel, Inc. | Perris | CA | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| RORochester Operations | Rochester | PA | Primary Metal Manufacturing331221 | 1-19 | ◐ LIKELY ACTIVE |
| RDRoller Die-Green Cove Springs | Green Cove Springs | FL | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| RDRoller Die-Louisville | Louisville | KY | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| RDRoller Die-Rossville | Rossville | GA | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| RFRoll Form | Iuka | MS | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| SSSaber Steel, LLC | Tulsa | OK | Primary Metal Manufacturing331221 | 1-19 | ◐ LIKELY ACTIVE |
| SSSalina Steel Supply, Inc. | Salina | KS | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| SSawyer | Sawyer | MI | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| SWSmith & Wesson Houlton, ME Site B | Houlton | ME | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| SESouth East Tube | Cadiz | KY | Primary Metal Manufacturing331221 | 1-19 | ◐ LIKELY ACTIVE |
| SSSouth Salt Lake City Branch | South Salt Lake | UT | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| SSSpecialty Steel Products, INC. | San Diego | CA | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| SMSSAB Minnesota Inc. | Roseville | MN | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| SSSTS Steel Technologies,LLC | Houston | TX | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| TCterrasmart - Cincinnati | Cincinnati | OH | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| TMTexas Military Department | Austin | TX | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| TITriangle Industrial Fab LLC | Tucson | AZ | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| TGTufts Grinding, Inc. | South Chicago Heights | IL | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| VOVandergrift Operations | Vandergrift | PA | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| WOWashington Operations | Washington | PA | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| WSWorthington Steel Cleveland | Cuyahoga Heights | OH | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| WSWorthington Steel Technical Services | Columbus | OH | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| ZOZelienople Operations | Zelienople | PA | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| MBMaster Builders & Erectors CORP | Folcroft | PA | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| OUOnyx Unlimited LLC | Trussville | AL | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| PSPacific Steel Group, LLC | San Diego | CA | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |