| WCWalbro Cass City | Cass City | 100–499 | ◐ LIKELY ACTIVE |
| WWarehouse | Macomb | 20–99 | ◐ LIKELY ACTIVE |
| WPWestlake Pipe & Fittings | Shelby Township | 100–499 | ◐ LIKELY ACTIVE |
| WWestland | Westland | 100–499 | ◐ LIKELY ACTIVE |
| WHWixom/Sterling Heights-Global Plastics- - F119 | Wixom | 20–99 | ◐ LIKELY ACTIVE |
| ZGZenith Global LLC | Howell | 20–99 | ◐ LIKELY ACTIVE |
| GPGem Products LLC | Brighton | — | ◐ LIKELY ACTIVE |
| PTProduct & Tooling Technologies, INC | Fraser | — | ◐ LIKELY ACTIVE |
| FMFlight Mold & Engineering INC | Saint Clair | — | ◇ UNVERIFIED |
| MPMaster Precision Global LLC | Greenville | — | ◇ UNVERIFIED |
| MEMohr Engineering | Brighton | — | ◇ UNVERIFIED |
| NPNorthern Plastics INC | Sterling Heights | — | ◇ UNVERIFIED |
| PCPlasteel CORP | Inkster | — | ◇ UNVERIFIED |
| SCSt Clair Packaging INC | Marysville | — | ◇ UNVERIFIED |
| SCSur-form Corporation | Chesterfield | — | ◇ UNVERIFIED |
| WLWpi LLC | Spring Lake | — | ◇ UNVERIFIED |
| 2C21st Century Plastics CORP | Potterville | — | ◇ UNVERIFIED |
| 3P3d Polymers | Troy | — | ◇ UNVERIFIED |
| 4S45oper Standard Automotive INC | East Tawas | — | ◇ UNVERIFIED |
| APAbc Packaging Equipment & Materials | Comstock Park | — | ◇ UNVERIFIED |
| AAccroseal | Vicksburg | — | ◇ UNVERIFIED |
| AAAdac Automotive | Muskegon | — | ◇ UNVERIFIED |
| AAAdec Automotive | Muskegon | — | ◇ UNVERIFIED |
 Advanced Drainage Systems INC | Owosso | — | ◇ UNVERIFIED |
| AFAdvanced Fabricating Technology, LLC | Rockford | — | ◇ UNVERIFIED |
| AFAdvanced Fibermolding Incorporated (n6515) | Leroy | — | ◇ UNVERIFIED |
| AIAG Innovation LLC | Rochester Hills | — | ◇ UNVERIFIED |
| ACAlpha Custom Extrusions INC | Saint Louis | — | ◇ UNVERIFIED |
| AMAlpine Mold, Incorporated | Williamsburg | — | ◇ UNVERIFIED |
| APAlro Plastics | Grand Rapids | — | ◇ UNVERIFIED |
| APAlr Products INC Dba Polly Products | Mulliken | — | ◇ UNVERIFIED |
| AMAmerican Molded Prod LLC | Shelby Twp | — | ◇ UNVERIFIED |
| ARAmerican Ring Company LLC | Ira | — | ◇ UNVERIFIED |
| APAmmex Plastics | Monroe | — | ◇ UNVERIFIED |
| AZAnhui Zhongding Sealing Parts Company Dba Michigan Rubber Products INC | Cadillac | — | ◇ UNVERIFIED |
| ARA Raymond Tinnerman Automotive INC | Rochester Hills | — | ◇ UNVERIFIED |
| AGArch Global Precision Dba Hi Vol Products LLC | Livonia | — | ◇ UNVERIFIED |
| ABArmaly Brands Dba Armaly Sponge Company | Commerce Township | — | ◇ UNVERIFIED |
| APAtlantic Precision Products | Shelby Township | — | ◇ UNVERIFIED |
| AEAuto Exec INC | Grand Rapids | — | ◇ UNVERIFIED |
| AQAuto Quip, Inc. | Kimball Township | — | ◇ UNVERIFIED |
| BPBarber Packaging CO | Bangor | — | ◇ UNVERIFIED |
| BRBasic Rubber & Plastics Company INC | Walled Lake | — | ◇ UNVERIFIED |
| BIBentzer INC | Edwardsburg | — | ◇ UNVERIFIED |
| BNBurgaflex North America INC Plt 4 | Fenton | — | ◇ UNVERIFIED |
| CCCartex Corporation | Troy | — | ◇ UNVERIFIED |
| CPCentury Plastics | Shelby Charter Twp | — | ◇ UNVERIFIED |
| CPChippewa Plastics | Evart | — | ◇ UNVERIFIED |
| CMCipa Molding | Kimball Twp | — | ◇ UNVERIFIED |
| CACoastal Automotive LLC | Holland | — | ◇ UNVERIFIED |
