| ACAsama Coldwater Manufacturing, INC. | Coldwater | MI | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| ATAtlas Tube- Plymouth Plant | Plymouth | MI | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| CCCadillac Casting, INC (b2178) | Cadillac | MI | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| CFCalhoun Fndy CO INC | Homer | MI | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| CMCannon Muskegon CORP | Muskegon | MI | Primary Metal Manufacturing331513 | 100-499 | ◐ LIKELY ACTIVE |
| CDCascade Die Casting / Great La Kes | Sparta | MI | Primary Metal Manufacturing331521 | 100-499 | ◐ LIKELY ACTIVE |
| CACity Aluminum Foundry | Waterford | MI | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
Cooper Foundry INC | Kalamazoo | MI | Primary Metal Manufacturing331522 | 1-19 | ◐ LIKELY ACTIVE |
| DCDundee Castings CO | Dundee | MI | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| DPDundee Products | Dundee | MI | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| FRFlat Rock Metal INC | Flat Rock | MI | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| GMGeneral Motors LLC - Bay City | Bay City | MI | Primary Metal Manufacturing331524 | 100-499 | ◐ LIKELY ACTIVE |
| GSGerdau Special Steel North America | Jackson | MI | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| GLGreat Lakes Towers LLC | Monroe | MI | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| HDHoffmann Die Cast LLC | St. Joseph | MI | Primary Metal Manufacturing331521 | 20-99 | ◐ LIKELY ACTIVE |
| ICInternational Casting CORP | New Baltimore | MI | Primary Metal Manufacturing331511 | 1-19 | ◐ LIKELY ACTIVE |
Kaiser Aluminum Fabricated Products LLC | Kalamazoo | MI | Primary Metal Manufacturing331312 | 100-499 | ◐ LIKELY ACTIVE |
| KFKent Foundry CO. | Greenville | MI | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| LPLinn Products INC | Charlotte | MI | Primary Metal Manufacturing331312 | 100-499 | ◐ LIKELY ACTIVE |
| MWMichigan Wheel CORP | Grand Rapids | MI | Primary Metal Manufacturing331525 | 20-99 | ◐ LIKELY ACTIVE |
| MCMnp CORP | Utica | MI | Primary Metal Manufacturing331222 | 100-499 | ◐ LIKELY ACTIVE |
| NGNew Gldc LLC | Muskegon | MI | Primary Metal Manufacturing331410 | 20-99 | ◐ LIKELY ACTIVE |
| NHNew Hudson CORP | New Hudson | MI | Primary Metal Manufacturing331491 | 1-19 | ◐ LIKELY ACTIVE |
| PGPsg Grand Rapids (previously Blackmer, a Dover Co) | Grand Rapids | MI | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| RAReal Alloy Specification LLC | Coldwater | MI | Primary Metal Manufacturing331313 | 20-99 | ◐ LIKELY ACTIVE |
| SCSupreme Casting | Stevensville | MI | Primary Metal Manufacturing331313 | 20-99 | ◐ LIKELY ACTIVE |
| TMTri-way Manufacturing | Roseville | MI | Primary Metal Manufacturing331511 | 1-19 | ◐ LIKELY ACTIVE |
| WMWindsor Machine & Stamping US LTD | Taylor | MI | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| WSWorthington Specialty Processing | Jackson | MI | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| WCWyman-gordon Company Brighton Operations | Brighton | MI | Primary Metal Manufacturing331492 | 100-499 | ◐ LIKELY ACTIVE |
| AAArco Alloys CORP | Detroit | MI | Primary Metal Manufacturing331492 | 1-19 | ◐ LIKELY ACTIVE |
| CFCentury Foundry INC | Muskegon Hts | MI | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| GGGci Gokoh Coldwater INC | Coldwater | MI | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| GLGreat Lakes Casting | Ludington | MI | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| GLGreat Lakes X-cel | Niles | MI | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| HBHackett Brass Foundry Company | Detroit | MI | Primary Metal Manufacturing331524 | 1-19 | ◐ LIKELY ACTIVE |
| KPKenwal Pickling, LLC | Dearborn | MI | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| LMLight Metals Corporation | Wyoming | MI | Primary Metal Manufacturing331314 | 100-499 | ◐ LIKELY ACTIVE |
| NPNew Products CORP | Benton Harbor | MI | Primary Metal Manufacturing331315 | 20-99 | ◐ LIKELY ACTIVE |
| NFNon Ferrous Cast Alloys INC | Muskegon | MI | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| PFPioneer Foundry CO INC | Jackson | MI | Primary Metal Manufacturing331511 | 1-19 | ◐ LIKELY ACTIVE |
| STSequoia Tool INC | Clinton Township | MI | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| STSteel Technologies INC | Canton | MI | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| AWAlcotec Wire CORP | Traverse City | MI | Primary Metal Manufacturing331318 | 20-99 | ◐ LIKELY ACTIVE |
| ALAlutech LLC | Benton Harbor | MI | Primary Metal Manufacturing331523 | — | ◐ LIKELY ACTIVE |
| AMAmeriti Manufacturing Company | Detroit | MI | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| ACAuto Cast Inc | Grandville | MI | Primary Metal Manufacturing331523 | 20-99 | ◐ LIKELY ACTIVE |
| BDBlue Diamond Steel Casting,inc. | Pigeon | MI | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| BLBrazeway, LLC Adrian | Adrian | MI | Primary Metal Manufacturing331316 | 20-99 | ◐ LIKELY ACTIVE |
| CEClark Engineering Company | Owosso | MI | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |