| EAEagle Alloy, INC. | Muskegon | 100–499 | ● ACTIVE |
| EPEagle Precision Cast Parts | Muskegon | 20–99 | ● ACTIVE |
| CCCannon-muskegon CORP | Norton Shores | — | ● ACTIVE |
| CMCannon Muskegon CORP | Muskegon | 100–499 | ◐ LIKELY ACTIVE |
| NFNon Ferrous Cast Alloys INC | Muskegon | — | ◇ UNVERIFIED |
| HCHowmet Castings Plant 10 | Whitehall | — | ◐ LIKELY ACTIVE |
| HCHowmet Corporation, Plant 4 | Whitehall | — | ◐ LIKELY ACTIVE |
| HCHowmet Corporation, Plants 1 & 3 | Whitehall | — | ◐ LIKELY ACTIVE |
| MTMetal Technologies, Inc., Ravenna Ductile Iron | Ravenna | — | ◐ LIKELY ACTIVE |
| PCPort City Metal Products | Muskegon | — | ◐ LIKELY ACTIVE |
| TCTextron Cwc Division | Muskegon | — | ◐ LIKELY ACTIVE |
| BSBekaert Steel | Muskegon | — | ◐ LIKELY ACTIVE |
| CFCentury Foundry INC | Muskegon Hts | — | ◐ LIKELY ACTIVE |
| GLGreat Lakes Die Cast | Muskegon | — | ◇ UNVERIFIED |
| CFCentury Foundry INC | Muskegon Heights | 20–99 | ◐ LIKELY ACTIVE |
| CFCentury Foundry Inc-2524 Park | Muskegon Heights | — | ◐ LIKELY ACTIVE |
| HRHowmet Research Center | Whitehall | — | ◐ LIKELY ACTIVE |
| NGNew Gldc LLC | Muskegon | 20–99 | ◐ LIKELY ACTIVE |
| SIShellcast INC | Montague | 20–99 | ◐ LIKELY ACTIVE |
| WPWhitehall Products LTD | Montague | — | ◐ LIKELY ACTIVE |
| BMBurgess-norton Mfg CO / Std Auto Parts CO Div | Muskegon | — | ◇ UNVERIFIED |
| HCHowmet Corporation, Hrc and Plants 5 & 10 | Whitehall | — | ◇ UNVERIFIED |
| MIMahle Inc-muskegon Hts Complex | Muskegon | — | ◇ UNVERIFIED |
| MSMichigan Steel, INC. | Muskegon | — | ◇ UNVERIFIED |
| MAMuskegon Aluminum Bronze F | Muskegon | — | ◇ UNVERIFIED |
| PIParamelt Icd Warehouse | Muskegon | — | ◇ UNVERIFIED |
| PCPort City Castings Corporation | Norton Shores | — | ◇ UNVERIFIED |
| PCPort City Die Cast | Muskegon | — | ◇ UNVERIFIED |
| AAludyne | Montague | 100–499 | ◐ LIKELY ACTIVE |
| EAEagle Aluminum Cast Products Sand Mold | Muskegon | 1–19 | ◐ LIKELY ACTIVE |
| HAHowmet Aerospace Whitehall Operations - HRC Complex | Whitehall | 100–499 | ◐ LIKELY ACTIVE |
| HAHowmet Aerospace Whitehall Operations - Plant 4 | Whitehall | 100–499 | ◐ LIKELY ACTIVE |
| HAHowmet Aerospace Whitehall Operations - Plant 5 | Whitehall | 100–499 | ◐ LIKELY ACTIVE |
| HAHowmet Aerospace Whitehall Operations - Whitehall Casting Plant 10 | Whitehall | 500+ | ◐ LIKELY ACTIVE |
| HAHowmet Aerospace Whitehall Operations- Whitehall Castings Plant 1 and 3 | Whitehall | 500+ | ◐ LIKELY ACTIVE |
| KCKautex - CWC | Muskegon | 100–499 | ◐ LIKELY ACTIVE |
| NONFCA Operations LLC -Norton Shores | Norton Shores | 20–99 | ◐ LIKELY ACTIVE |
| PIPACE INDUSTRIES Muskegon #1 - PCDC | Muskegon | 100–499 | ◐ LIKELY ACTIVE |
| PIPACE INDUSTRIES Muskegon #3 - PCMP | Muskegon | 1–19 | ◐ LIKELY ACTIVE |
| RCRavenna Casting Center, LLC | Ravenna | 100–499 | ◐ LIKELY ACTIVE |
| EAEagle Aluminum Cast Products INC | Muskegon | — | ◇ UNVERIFIED |
| AHAlcoa Howmet - Ti Cast Plant 5 | Whitehall | — | ◇ UNVERIFIED |
| AHAlcoa Howmet Titanium Ingot | Whitehall | — | ◇ UNVERIFIED |
| ARAlloy Resources CORP | Muskegon | — | ◇ UNVERIFIED |
| CDCameron Dynatorque | Muskegon | — | ◇ UNVERIFIED |
| CMChassix Montague Operations | Montague | — | ◇ UNVERIFIED |
| GLGreat Lakes Die Cast CORP | Muskegon | — | ◇ UNVERIFIED |
| MTMetal Technologies Dba Ravenna Ductile Iron Plant | Ravenna | — | ◇ UNVERIFIED |
| MFMike's Foundry INC. | Ravenna | — | ◇ UNVERIFIED |
| RCRail Components, Inc. | Muskegon | — | ◇ UNVERIFIED |