| IPIrvin Plant | West Mifflin | PA | Primary Metal Manufacturing331110 | 500+ | ◐ LIKELY ACTIVE |
| JSJb Stamping INC. | Associate Ave. | OH | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| KWKeysteel Wire Corporation | New Carney | TX | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| KKiswire | Pine Bluff | AR | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| KIKWM, Inc. dba Stainless Structurals Works | Conroe | TX | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| KSKyoei Steel America, LLC | Vinton | TX | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| LFLahti Fabrication Inc | Alger | MI | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| LSLapham-Hickey Steel | Little Canada | MN | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| LSLapham-Hickey Steel Corp | Madison | IL | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| LOLatrobe Operations | Latrobe | PA | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| LFLaX Fabricating LTD - Spring Grove MN | Spring Grove | MN | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| LFLaX Fabricating LTD - Westby WI | Westby | WI | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| LELevy Environmental Services Company dba Brandenburg Mill Service | Brandenburg | KY | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| LELevy Environmental Services Company dba Butler Mill Service | Butler | IN | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| LELevy Environmental Services Company dba Charleston Mill Service | Huger | SC | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| LELevy Environmental Services Company dba Columbia City Mill Services | Columbia City | IN | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| LELevy Environmental Services Company dba Fulton Mill Service | Delta | OH | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| LELevy Environmental Services Company dba Levy Big River | Osceola | AR | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| LELevy Environmental Services Company dba Levy Gallatin Mill Service | Ghent | KY | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| LELevy Environmental Services Company dba Levy NYS Mill Service | Blytheville | AR | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| LELevy Environmental Services Company dba Levy Texas Mill Services | Sinton | TX | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| LELevy Environmental Services Company dba SeaTac Steel Mill and Recycling Services | Seattle | WA | Primary Metal Manufacturing331110 | 1-19 | ◐ LIKELY ACTIVE |
| LOLockport Operations | Loc | NY | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| LLLSM - Latrobe | Latrobe | PA | Primary Metal Manufacturing331110 | 500+ | ◐ LIKELY ACTIVE |
| LSLSM - Sandy Creek | Franklin | PA | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| MFMedford Fabrication | Medford | OR | Primary Metal Manufacturing331110 | 1-19 | ◐ LIKELY ACTIVE |
| MJMedtronic JAXs | Jacksonville | FL | Primary Metal Manufacturing331110 | 500+ | ◐ LIKELY ACTIVE |
| MSMedtronic Santa Clara | Santa Clara | CA | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| MMMemphis Mill Service Company | Memphis | TN | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| MMetalac | Latrobe | PA | Primary Metal Manufacturing331110 | 1-19 | ◐ LIKELY ACTIVE |
| MUMetals USA- Wooster | Wooster | OH | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| MPMidwest Plant | Portage | IN | Primary Metal Manufacturing331110 | 500+ | ◐ LIKELY ACTIVE |
| MSMillennium Steel Service | Princeton | IN | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| MAMobis America Inc dba Mobis Alabama LLC | Montgomery | AL | Primary Metal Manufacturing331110 | 500+ | ◐ LIKELY ACTIVE |
| MMMonarch Materials Group, Inc. | Adel | IA | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| MCMoody Construction Services, Inc. | Duette | FL | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| NNARSTCO-Midlothian | Midlothian | TX | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| NGNational Galvanizing | Monroe | MI | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| NSNippon Steel Pipe America Inc | Seymour | IN | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| NINN, Inc. Palmer | Palmer | MA | Primary Metal Manufacturing331110 | 1-19 | ◐ LIKELY ACTIVE |
| NCNucor Corporation | Jewett | TX | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| NSNucor Skyline | Belpre | OH | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| NSNucor Steel Hertford County | Cofield | NC | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| NSNucor Steel Jewett TX | Jewett | TX | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| NSNucor Steel Seattle INC. | Seattle (SEA) | WA | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| OIONI Industries | Ambridge | PA | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| OOPTA-Affival | New Kensington | PA | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| OHOPTA-Burns Harbor | Burns Harbor | IN | Primary Metal Manufacturing331110 | 1-19 | ◐ LIKELY ACTIVE |
| OTOPTA-Edgar Thomson | Braddock | PA | Primary Metal Manufacturing331110 | 1-19 | ◐ LIKELY ACTIVE |
| OSOutokumpu Stainless USA LLC | Calvert | AL | Primary Metal Manufacturing331110 | 500+ | ◐ LIKELY ACTIVE |