| MBMaterion Brush INC | Elmore | OH | Primary Metal Manufacturing331410 | 500+ | ● ACTIVE |
Matthews International Corporation | Searcy | AR | Primary Metal Manufacturing331522 | 100-499 | ● ACTIVE |
Matthews International Corporation | Pittsburgh | PA | Primary Metal Manufacturing331523 | — | ● ACTIVE |
Maynard Steel Casting CO | Milwaukee | WI | Primary Metal Manufacturing331510 | 100-499 | ● ACTIVE |
| MDMcwane Ductile - New Jersey | Phillipsburg | NJ | Primary Metal Manufacturing331511 | 100-499 | ● ACTIVE |
M-d Building Products, INC. | Oklahoma City | OK | Primary Metal Manufacturing331318 | 500+ | ● 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 |
| MRMetallic Resources INC | Twinsburg | OH | Primary Metal Manufacturing331491 | 20-99 | ● ACTIVE |
| MTMetal Technologies Auburn LLC | Auburn | IN | Primary Metal Manufacturing331511 | 100-499 | ● ACTIVE |
| MAMetalx Aluminum Conversions LLC | Wabash | IN | Primary Metal Manufacturing331314 | 100-499 | ● ACTIVE |
Metglas, INC | Conway | SC | Primary Metal Manufacturing331110 | 100-499 | ● 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 |
Miller Castings INC | Whittier | CA | Primary Metal Manufacturing331511 | 100-499 | ● ACTIVE |
Minalex CORP | Whitehouse Station | NJ | Primary Metal Manufacturing331312 | 20-99 | ● ACTIVE |
Minnesota Wire & Cable CO | Saint Paul | MN | Primary Metal Manufacturing331222 | — | ● 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 |
| MCMueller CO | Albertville | AL | Primary Metal Manufacturing331511 | 500+ | ● 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 |
New England Wire Technologies CORP. | Lisbon | NH | Primary Metal Manufacturing331420 | 100-499 | ● ACTIVE |
Ngk Metals Corporation | Sweetwater | TN | Primary Metal Manufacturing331420 | 20-99 | ● ACTIVE |
| NMNielsen Moulding, LLC | Gainesboro | TN | Primary Metal Manufacturing331316 | 20-99 | ● ACTIVE |
| NSNj Shell Casting Corp/ Marietta | Marietta | PA | Primary Metal Manufacturing331511 | 1-19 | ● ACTIVE |
| NANorth American Stainless | Ghent | KY | Petroleum and Coal Products Manufacturing324199 | 500+ | ● 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 |
| NSNucor Steel | Crawfordsville | IN | Primary Metal Manufacturing331110 | 500+ | ● ACTIVE |
| NSNucor Steel- Berkeley | Huger | SC | Nonmetallic Mineral Product Manufacturing327320 | 500+ | ● ACTIVE |
| NSNucor Steel Decatur | Trinity | AL | Primary Metal Manufacturing331110 | 500+ | ● ACTIVE |
Nucor Steel Memphis, INC | Memphis | TN | Primary Metal Manufacturing331110 | 500+ | ● ACTIVE |
| OSOhio Star Forge CO. | Champion | OH | Primary Metal Manufacturing331210 | 100-499 | ● ACTIVE |
Oil City Iron Works, INC | Corsicana | TX | Primary Metal Manufacturing331511 | 100-499 | ● ACTIVE |
Olympic Industries, LLC | Cordova | TN | Primary Metal Manufacturing331316 | 20-99 | ● ACTIVE |
| OSOmaha Steel Castings | Wahoo | NE | Primary Metal Manufacturing331513 | 20-99 | ● ACTIVE |
Omega Castings, INC | Battle Creek | MI | Primary Metal Manufacturing331511 | — | ● ACTIVE |
Optical Cable CORP | Roanoke | VA | Primary Metal Manufacturing331491 | 100-499 | ● ACTIVE |
| OSOregon Steel Mills LLC | Portland | OR | Petroleum and Coal Products Manufacturing324199 | — | ● ACTIVE |
| OIOsco Industries INC - Jackson Div | Jackson | OH | Primary Metal Manufacturing331511 | 100-499 | ● ACTIVE |
Padgett INC | New Albany | IN | Primary Metal Manufacturing331210 | 100-499 | ● ACTIVE |
Parmatech Corporation | Petaluma | CA | Primary Metal Manufacturing331110 | 20-99 | ● ACTIVE |
| PAPcc Airfoils LLC Smp INC | Wickliffe | OH | Primary Metal Manufacturing331529 | 100-499 | ● ACTIVE |
| PAPcc Airfoils Mentor | Mentor | OH | Primary Metal Manufacturing331512 | 100-499 | ● ACTIVE |
Pcc Structurals, INC. | Portland | OR | Primary Metal Manufacturing331112 | — | ● ACTIVE |
| PSPcc Structurals - San Leandro | San Leandro | CA | Primary Metal Manufacturing331110 | 100-499 | ● ACTIVE |