M-d Building Products, INC. | Oklahoma City | OK | Primary Metal Manufacturing331318 | 500+ | ● ACTIVE |
| MPMdc Precision LLC | Hayward | CA | Primary Metal Manufacturing331110 | 100-499 | ● ACTIVE |
Med-pac INC | Lake Park | MN | Primary Metal Manufacturing331210 | 1-19 | ● ACTIVE |
| MEM E Global INC | Tempe | AZ | Primary Metal Manufacturing331513 | 100-499 | ● ACTIVE |
| MFMeloon Foundries, LLC | Syracuse | NY | Primary Metal Manufacturing331524 | 20-99 | ● ACTIVE |
| MSMerit Steel Company | Kouts | IN | Primary Metal Manufacturing331222 | 20-99 | ● ACTIVE |
Metal Flow Corporation | Holland | MI | Primary Metal Manufacturing331221 | 100-499 | ● ACTIVE |
| MRMetallic Resources INC | Twinsburg | OH | Primary Metal Manufacturing331491 | 20-99 | ● ACTIVE |
Metallus INC. | Canton | OH | Primary Metal Manufacturing331110 | 500+ | ● ACTIVE |
| MTMetal Technologies Auburn LLC | Auburn | IN | Primary Metal Manufacturing331511 | 100-499 | ● ACTIVE |
Metaltek International, INC. | Waukesha | WI | Primary Metal Manufacturing331529 | 500+ | ● ACTIVE |
| MAMetalx Aluminum Conversions LLC | Wabash | IN | Primary Metal Manufacturing331314 | 100-499 | ● ACTIVE |
Metco Ind | Saint Marys | PA | Primary Metal Manufacturing331110 | 100-499 | ● ACTIVE |
Metglas, INC | Conway | SC | Primary Metal Manufacturing331110 | 100-499 | ● 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 |
| MSMichigan Seamless Tube, LLC | South Lyon | MI | Primary Metal Manufacturing331110 | 100-499 | ● ACTIVE |
Micro-tek Corporation | Cinnaminson | NJ | Primary Metal Manufacturing331491 | 20-99 | ● ACTIVE |
Midwest Bale Ties INC | Crawfordsville | IN | Primary Metal Manufacturing331222 | 1-19 | ● ACTIVE |
Miller Castings INC | Whittier | CA | Primary Metal Manufacturing331511 | 100-499 | ● ACTIVE |
Milwaukee Precision Casting INC | Milwaukee | WI | Primary Metal Manufacturing331512 | — | ● ACTIVE |
Minalex CORP | Whitehouse Station | NJ | Primary Metal Manufacturing331312 | 20-99 | ● ACTIVE |
Minnesota Wire & Cable CO | Saint Paul | MN | Primary Metal Manufacturing331222 | — | ● ACTIVE |
| MUMinova USA INC | Georgetown | KY | Chemical Manufacturing325991 | — | ● ACTIVE |
Mitternight Boiler Works INC | Satsuma | AL | Primary Metal Manufacturing331210 | 20-99 | ● ACTIVE |
Morel Industries, INC | Arlington | WA | Primary Metal Manufacturing331529 | — | ● ACTIVE |
Morgan Advanced Ceramics, INC. | Hayward | CA | Nonmetallic Mineral Product Manufacturing327110 | 100-499 | ● ACTIVE |
| MBMueller Brass CO. | Port Huron | MI | Primary Metal Manufacturing331420 | 100-499 | ● ACTIVE |
Mueller Impacts Co, INC | Marysville | MI | Primary Metal Manufacturing331316 | 20-99 | ● ACTIVE |
Mws Precision Wire Industries, INC. | Oxnard | CA | Primary Metal Manufacturing331420 | 20-99 | ● ACTIVE |
Nathan Trotter and Co., INC | Coatesville | PA | Primary Metal Manufacturing331491 | 20-99 | ● ACTIVE |
Nav-x, LLC | Fort Lauderdale | FL | Primary Metal Manufacturing331318 | 1-19 | ● ACTIVE |
Neuman Aluminium Impact Extrusion, INC. | Waynesboro | VA | Primary Metal Manufacturing331315 | 20-99 | ● ACTIVE |
New England Wire Technologies CORP. | Lisbon | NH | Primary Metal Manufacturing331420 | 100-499 | ● ACTIVE |
Ngk Metals Corporation | Sweetwater | TN | Primary Metal Manufacturing331420 | 20-99 | ● ACTIVE |
Noble Metals Services, INC. | Cranston | RI | Primary Metal Manufacturing331410 | 1-19 | ● ACTIVE |
Norsk Titanium US INC | Plattsburgh | NY | Primary Metal Manufacturing331492 | 20-99 | ● ACTIVE |
North American Hoganas Company | Hollsopple | PA | Primary Metal Manufacturing331110 | 100-499 | ● ACTIVE |
| NANorth American Stainless | Ghent | KY | Petroleum and Coal Products Manufacturing324199 | 500+ | ● ACTIVE |
Northern Stainless CORP | Pewaukee | WI | Primary Metal Manufacturing331513 | — | ● ACTIVE |
Northfield Manufacturing, INC | Westland | MI | Primary Metal Manufacturing331511 | 20-99 | ● ACTIVE |
North Jackson Specialty Steel LLC | North Jackson | OH | Primary Metal Manufacturing331110 | — | ● ACTIVE |
Northlake Steel CORP | Valley City | OH | Primary Metal Manufacturing331221 | 20-99 | ● ACTIVE |
| NSNorth Star Bluescope Steel LLC | Delta | OH | Primary Metal Manufacturing331110 | 500+ | ● ACTIVE |
Novamet Specialty Products Corporation | Lebanon | TN | Primary Metal Manufacturing331492 | 20-99 | ● ACTIVE |
Nuclead Manufacturing, Co., INC. | West Bridgewater | MA | Primary Metal Manufacturing331410 | 1-19 | ● ACTIVE |
Nuclear Lead Co, INC. | Oak Ridge | TN | Primary Metal Manufacturing331491 | 1-19 | ● ACTIVE |
| NCNucor Corporation | Norfolk | NE | Primary Metal Manufacturing331110 | — | ● ACTIVE |
| NSNucor Steel | Crawfordsville | IN | Primary Metal Manufacturing331110 | 500+ | ● ACTIVE |
| NSNucor Steel- Berkeley | Huger | SC | Nonmetallic Mineral Product Manufacturing327320 | 500+ | ● ACTIVE |