| SISamuel-whittar INC | Detroit | MI | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| STSequoia Tool INC | Clinton Township | MI | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| SSpacerak | Marlette | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SFSparta Foundry INC | Sparta | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SFSturgis Foundry Corporation | Sturgis | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| TITepco INC | South Lyon | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TPThreaded Products CO | Richmond | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| TATi Automotive Systems | Auburn Hills | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TTransform-shelby | Shelby Township | MI | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| TMTri-way Manufacturing | Roseville | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| UCUltimate Casting and Machining | West Branch | MI | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| UTUniversal Tube | Rochester Hills | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| UNUp North Industries LLC | Petoskey | MI | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| VCVillage Castings CO | Caseville | MI | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
Waupaca Foundry, INC. - Plant 1 (ironwood) | Ironwood | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| WWWayne Wire Cloth Prod | Kalkaska | MI | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| WDWolverine Die Cast-hoover Rd | Warren | MI | Primary Metal Manufacturing331522 | — | ◇ UNVERIFIED |
| WSWorthington Specialty Processing - Canton | Canton | MI | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| YSYale Steel INC | Yale | MI | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| AAludyne | Montague | MI | Primary Metal Manufacturing331523 | 100-499 | ◐ LIKELY ACTIVE |
| ASAmerican SpiralWeld Great Lakes Division | Flint | MI | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| AOAMG Operations LLC - White Cloud Location | White Cloud | MI | Primary Metal Manufacturing331529 | 1-19 | ◐ LIKELY ACTIVE |
| ABAnchor Bay Steel, LLC | Southfield | MI | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
Artiflex Manufacturing Eau Claire | Eau Claire | MI | Primary Metal Manufacturing331523 | 1-19 | ◐ LIKELY ACTIVE |
| ACAuto Cast Inc | Grandville | MI | Primary Metal Manufacturing331523 | 20-99 | ◐ LIKELY ACTIVE |
| ACAutomotive Center | Troy | MI | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| BPBar Processing Warren | Warren | MI | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| BABowers Aluminum | Battle Creek | MI | Primary Metal Manufacturing331318 | 20-99 | ◐ LIKELY ACTIVE |
| BTBWD Technologies | Dearborn | MI | Primary Metal Manufacturing331221 | 1-19 | ◐ LIKELY ACTIVE |
| CSCapital steel and wire, Eden rd | Mason | MI | Primary Metal Manufacturing331221 | 1-19 | ◐ LIKELY ACTIVE |
| CSCapital steel and wire, Hull Rd | Mason | MI | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| CSCapital steel and wire inc | Dewitt | MI | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| CSCapital steel and wire, Raycraft | Ithaca | MI | Primary Metal Manufacturing331221 | 1-19 | ◐ LIKELY ACTIVE |
| CDCascade Die Casting Group, Inc. Great Lakes Division Plant 2 | Sparta | MI | Primary Metal Manufacturing331523 | 20-99 | ◐ LIKELY ACTIVE |
Combined Metals Company LLC - Ann Arbor | Ann Arbor | MI | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| CDCurbs & Damper Products Inc. | Roseville | MI | Primary Metal Manufacturing331110 | 1-19 | ◐ LIKELY ACTIVE |
| DFDock Foundry LLC dba Three Rivers Gray Iron | Three Rivers | MI | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| EAEagle Aluminum Cast Products Sand Mold | Muskegon | MI | Primary Metal Manufacturing331524 | 1-19 | ◐ LIKELY ACTIVE |
| ECEdw C Levy Co dba Edw C Levy Co (Detroit) | Detroit | MI | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
Elmet Technologies | Coldwater, MI | MI | Primary Metal Manufacturing331492 | 100-499 | ◐ LIKELY ACTIVE |
| FMFerrolux Metals Co. | Gibraltar | MI | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| FGFlexco Grand Rapids-Walker | Walker | MI | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| GLGreat Lakes Castings LLC | Ludington | MI | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| GLGreat Lakes Castings LLC | Holland | MI | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| GLGreat Lakes Division Plant 1 | Sparta | MI | Primary Metal Manufacturing331523 | 100-499 | ◐ LIKELY ACTIVE |
| GLGreat Lakes Works | Ecorse | MI | Primary Metal Manufacturing331110 | 500+ | ◐ LIKELY ACTIVE |
| HEHofmann Eau Claire Plant | Eau Claire | MI | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| HAHowmet Aerospace Whitehall Operations - HRC Complex | Whitehall | MI | Primary Metal Manufacturing331529 | 100-499 | ◐ LIKELY ACTIVE |
| HAHowmet Aerospace Whitehall Operations - Plant 5 | Whitehall | MI | Primary Metal Manufacturing331529 | 100-499 | ◐ LIKELY ACTIVE |
| HAHowmet Aerospace Whitehall Operations - Whitehall Casting Plant 10 | Whitehall | MI | Primary Metal Manufacturing331529 | 500+ | ◐ LIKELY ACTIVE |