Korff Holdings, LLC | Salem | OH | Primary Metal Manufacturing331511 | — | ● ACTIVE |
| KMKortick Manufacturing | Pittsburg | CA | Primary Metal Manufacturing331511 | 20-99 | ● ACTIVE |
| LMLangeloth Metallurgical Company LLC | Langeloth | PA | Primary Metal Manufacturing331110 | 20-99 | ● ACTIVE |
| LILeachgarner, INC. | Attleboro | MA | Primary Metal Manufacturing331491 | 100-499 | ● ACTIVE |
Leroy Tool & Die INC | Leroy | MI | Primary Metal Manufacturing331521 | — | ● ACTIVE |
| LMLite Magnesium Products INC | Ravenna | OH | Primary Metal Manufacturing331491 | 20-99 | ● ACTIVE |
| LMLodge Manufacturing Company | South Pittsburg | TN | Primary Metal Manufacturing331511 | 500+ | ● ACTIVE |
Lodi Iron Works, INC. | Lodi | CA | Primary Metal Manufacturing331511 | — | ● ACTIVE |
Lovejoy, LLC | South Haven | MI | Primary Metal Manufacturing331523 | — | ● ACTIVE |
| LILucas-milhaupt, INC. | Cudahy | WI | Primary Metal Manufacturing331491 | 100-499 | ● ACTIVE |
Luvata Appleton LLC | Kimberly | WI | Primary Metal Manufacturing331420 | — | ● ACTIVE |
Luxfer Magtech INC | Saxonburg | PA | Chemical Manufacturing325180 | — | ● ACTIVE |
| MEMadison Electric Company | Fraser | MI | Primary Metal Manufacturing331319 | — | ● ACTIVE |
| MTMarkin Tubing | Wyoming | NY | Primary Metal Manufacturing331210 | 20-99 | ● ACTIVE |
Marlin Steel Wire Products LLC | Baltimore | MD | Primary Metal Manufacturing331222 | — | ● ACTIVE |
| MNMaterion Newton INC | Newton | MA | Primary Metal Manufacturing331410 | 100-499 | ● ACTIVE |
| MPMdc Precision LLC | Hayward | CA | Primary Metal Manufacturing331110 | — | ● ACTIVE |
Med-pac INC | Lake Park | MN | Primary Metal Manufacturing331210 | — | ● ACTIVE |
Metallus INC. | Canton | OH | Primary Metal Manufacturing331110 | 500+ | ● ACTIVE |
Metalor Technologies USA Corporation | North Attleboro | MA | Chemical Manufacturing325180 | — | ● ACTIVE |
Metalwerks, INC. | Aliquippa | PA | Primary Metal Manufacturing331419 | — | ● ACTIVE |
| MBMetro Boiler Tube Company, INC. | Ringgold | GA | Primary Metal Manufacturing331210 | 100-499 | ● ACTIVE |
| MSMetro Steel & Pipe Supply, INC. | Tavares | FL | Primary Metal Manufacturing331110 | 20-99 | ● ACTIVE |
Microcast Technologies CORP | Linden | NJ | Primary Metal Manufacturing331523 | — | ● ACTIVE |
| MWMid-south Wire Company | Nashville | TN | Primary Metal Manufacturing331222 | 100-499 | ● ACTIVE |
Midwest Aerospace Casting, LLC | Merrillville | IN | Primary Metal Manufacturing331524 | — | ● ACTIVE |
Midwest Bale Ties INC | Crawfordsville | IN | Primary Metal Manufacturing331222 | — | ● ACTIVE |
Milwaukee Precision Casting INC | Milwaukee | WI | Primary Metal Manufacturing331512 | — | ● ACTIVE |
| MUMinova USA INC | Georgetown | KY | Chemical Manufacturing325991 | — | ● ACTIVE |
Mitternight Boiler Works INC | Satsuma | AL | Primary Metal Manufacturing331210 | — | ● ACTIVE |
Morel Industries, INC | Arlington | WA | Primary Metal Manufacturing331529 | — | ● ACTIVE |
| MRMountain Ridge Metals INC | Millersburg | PA | Primary Metal Manufacturing331318 | 100-499 | ● ACTIVE |
| MIMultimetco INC | Anniston | AL | Primary Metal Manufacturing331314 | 20-99 | ● ACTIVE |
National Chimney Supply-vermont, INC. | South Burlington | VT | Primary Metal Manufacturing331210 | — | ● ACTIVE |
National Fence Systems INC. | Avenel | NJ | Primary Metal Manufacturing331111 | — | ● ACTIVE |
| NANebraska Aluminum Castings INC | Hastings | NE | Primary Metal Manufacturing331521 | 20-99 | ● ACTIVE |
| NANemak Alabama | Sylacauga | AL | Primary Metal Manufacturing331523 | 500+ | ● ACTIVE |
Neuman Aluminium Impact Extrusion, INC. | Waynesboro | VA | Primary Metal Manufacturing331315 | — | ● ACTIVE |
Noble Metals Services, INC. | Cranston | RI | Primary Metal Manufacturing331410 | — | ● ACTIVE |
Norican Group North American, INC. | Lagrange | GA | Primary Metal Manufacturing331511 | 100-499 | ● ACTIVE |
North American Hoganas Company | Hollsopple | PA | Primary Metal Manufacturing331110 | — | ● ACTIVE |
Northern Stainless CORP | Pewaukee | WI | Primary Metal Manufacturing331513 | — | ● ACTIVE |
| NMNorthfield Manufacturing, INC | Westland | MI | Primary Metal Manufacturing331511 | 20-99 | ● ACTIVE |
North Jackson Specialty Steel LLC | North Jackson | OH | Primary Metal Manufacturing331110 | — | ● ACTIVE |
Nuclead Manufacturing, Co., INC. | West Bridgewater | MA | Primary Metal Manufacturing331410 | — | ● ACTIVE |
Nuclear Lead Co, INC. | Oak Ridge | TN | Primary Metal Manufacturing331491 | — | ● ACTIVE |
| NSNucor Steel Brandenburg | Brandenburg | KY | Primary Metal Manufacturing331110 | 500+ | ● ACTIVE |
| NSNucor Steel - Lexington | Lexington | NC | Primary Metal Manufacturing331110 | 100-499 | ● ACTIVE |
| NSNucor Steel Tuscaloosa, INC. | Tuscaloosa | AL | Primary Metal Manufacturing331110 | 100-499 | ● ACTIVE |
Nugreen Metals LLC | San Antonio | TX | Primary Metal Manufacturing331492 | — | ● ACTIVE |