| LMLaurel Machine and Foundry, Hawkes Circle | Laurel | MS | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| MMMisa Metal Processing Forest, Mississippi | Forest | MS | Primary Metal Manufacturing331221 | 1-19 | ◐ LIKELY ACTIVE |
| MCMueller Copper Tube Company | Fulton | MS | Primary Metal Manufacturing331420 | 500+ | ◐ LIKELY ACTIVE |
| MCMuller Copper Line Sets | Fulton | MS | Primary Metal Manufacturing331410 | 100-499 | ◐ LIKELY ACTIVE |
| PMPT- Mississippi Investment Castings | Columbus | MS | Primary Metal Manufacturing331512 | 20-99 | ◐ LIKELY ACTIVE |
| RFRoll Form | Iuka | MS | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| SPStarkville Plant | Starkville | MS | Primary Metal Manufacturing331420 | 100-499 | ◐ LIKELY ACTIVE |
| SDSteel Dynamics, Inc. - Flat Roll Group - Columbus | Columbus | MS | Primary Metal Manufacturing331110 | 500+ | ◐ LIKELY ACTIVE |
| WWalnut | Walnut | MS | Primary Metal Manufacturing331318 | 100-499 | ◐ LIKELY ACTIVE |
| WEWeir Esco Newton | Newton | MS | Primary Metal Manufacturing331513 | 100-499 | ◐ LIKELY ACTIVE |
| SMSpecialty Metals Supply INC | Jackson | MS | Primary Metal Manufacturing331491 | — | ◐ LIKELY ACTIVE |
| SSS&h Steel Corporation | Pearl | MS | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| ATAdvance Tool & Die, INC. | Pearl | MS | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| BEBerry Enterprise of Ms, INC | Perkinston | MS | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CDChrome Deposit Corp., Columbus Roll Shop | Columbus | MS | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| CMCommercial Metals | — | MS | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| CMCroft Metals INC | Newton | MS | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| FMFerrousouth/ferrous Metal Transfer | Iuka | MS | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| GIGraham Industrial Services | Laurel | MS | Primary Metal Manufacturing331112 | — | ◇ UNVERIFIED |
| JTJindal Tubular Usa, LLC | Bay Saint Louis | MS | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| KSKarnavati Steel Inds. Mississippi | Biloxi | MS | Primary Metal Manufacturing331423 | — | ◇ UNVERIFIED |
| LLLamar, LLC | Lumberton | MS | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| LILong Industrial Tools | Greenville | MS | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| MFMaeco Fabrication, INC. | Biloxi | MS | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MPMississippi Precision Casting Parts, LLC | Columbus | MS | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| MCMuller Cooper Tube Company, INC. | Fulton | MS | Primary Metal Manufacturing331421 | — | ◇ UNVERIFIED |
| NMNortheast Metal Processors, INC. | Plantersville | MS | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| PFParhen Foundry, INC. | Amory | MS | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SXSchulz Xtruded Products | Robinsonville | MS | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SCScrew Conveyor Corporation | Winona | MS | Primary Metal Manufacturing331112 | — | ◇ UNVERIFIED |
| SMStylelander Metal Stampings INC | Verona | MS | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| WCWorthington Cylinders | New Albany | MS | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
