| ATAtlas Tube- Plymouth Plant | Plymouth | MI | Primary Metal Manufacturing331210 | 20-99 | ◐ 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 |
| 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 | Saint 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 |
| MWMichigan Wheel CORP | Grand Rapids | MI | Primary Metal Manufacturing331525 | 20-99 | ◐ LIKELY ACTIVE |
| MCMnp CORP | Utica | MI | Primary Metal Manufacturing331222 | 100-499 | ◐ 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 |
| 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 |
| AWAlcotec Wire CORP | Traverse City | MI | Primary Metal Manufacturing331318 | 20-99 | ◐ LIKELY ACTIVE |
| AIAstech INC | Vassar | MI | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| BDBlue Diamond Steel Casting,inc. | Pigeon | MI | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
Cooper Foundry INC | Kalamazoo | MI | Primary Metal Manufacturing331522 | — | ◐ LIKELY ACTIVE |
| DCDundee Castings CO | Dundee | MI | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
Eutectix LLC | Troy | MI | Primary Metal Manufacturing331492 | — | ◐ LIKELY ACTIVE |
| GMGeneral Motors Powetrain | Saginaw | MI | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| GLGrede LLC - Iron Mountain | Kingsford | MI | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| HDHercules Drawn Steel CORP | Livonia | MI | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| HCHowmet Castings Plant 10 | Whitehall | MI | Primary Metal Manufacturing331529 | — | ◐ LIKELY ACTIVE |
| HCHowmet Corporation, Plant 4 | Whitehall | MI | Primary Metal Manufacturing331492 | — | ◐ LIKELY ACTIVE |
| HCHowmet Corporation, Plants 1 & 3 | Whitehall | MI | Primary Metal Manufacturing331528 | — | ◐ LIKELY ACTIVE |
| LMLight Metals Corporation | Wyoming | MI | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| LPLinn Products INC | Charlotte | MI | Primary Metal Manufacturing331318 | 100-499 | ◐ LIKELY ACTIVE |
| MTMetal Technologies, Inc., Ravenna Ductile Iron | Ravenna | MI | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| NSNorth Star Steel CO | Monroe | MI | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| PJPhillips & Johnston INC Dba River Rock Fabrication | Grand Rapids | MI | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| PCPort City Metal Products | Muskegon | MI | Primary Metal Manufacturing331523 | — | ◐ LIKELY ACTIVE |
| RAReal Alloy Recycling, LLC | Coldwater | MI | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| TCTextron Cwc Division | Muskegon | MI | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
Troy Tube & Manufacturing CO | Chesterfield | MI | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| VSVast Sumitec INC | Benton Harbor | MI | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| WMWindsor Machine & Stamping US LTD | Taylor | MI | Primary Metal Manufacturing331222 | — | ◐ LIKELY ACTIVE |
| BSBekaert Steel | Muskegon | MI | Primary Metal Manufacturing331222 | — | ◐ LIKELY ACTIVE |
| CFCentury Foundry INC | Muskegon Hts | MI | Primary Metal Manufacturing331524 | — | ◐ LIKELY ACTIVE |
| ICIntermet CORP | Stevensville | MI | Primary Metal Manufacturing331521 | — | ◐ LIKELY ACTIVE |
| KWKreher Wire Processing | Romulus | MI | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| PHParker Hannifin-otsego | Otsego | MI | Primary Metal Manufacturing331420 | — | ◐ LIKELY ACTIVE |
| SSSandvik Steel CO | Benton Harbor | MI | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| STSteel Technologies INC | Canton | MI | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |