| MDMagna Donnelly CORP. | Holland | MI | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| MEMagna Electronics | Grand Blanc | MI | Computer and Electronic Product Manufacturing334418 | — | ◇ UNVERIFIED |
| MMMagna Mirrors | Holland | MI | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| MMMagna Mirrors Corporation | Holland | MI | Transportation Equipment Manufacturing336322 | — | ◇ UNVERIFIED |
| MMMagna Mirrors Corporation | Grand Haven | MI | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| MSMagna Seating Auburn Hills | Auburn Hills | MI | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| MCMag-tec Casting CORP | Jackson | MI | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| MBMahle Behr USA INC | Troy | MI | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| MPMahle Powertrain LLC | Novi | MI | Transportation Equipment Manufacturing336360 | — | ◇ UNVERIFIED |
| MIMalloy INC | Ann Arbor | MI | Printing and Related Support Activities323117 | — | ◇ UNVERIFIED |
| MPMarathon Petroleum | Detroit | MI | Chemical Manufacturing325194 | — | ◇ UNVERIFIED |
| MCMarch Coatings INC | Brighton | MI | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| MPMarelco Power Systems | Howell | MI | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
| MPMarsh Plating Corp-ypsilanti | Ypsilanti | MI | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| MPMassee Products LTD | Niles | MI | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| MCMastercraft Cabinets INC | Grawn | MI | Furniture and Related Product Manufacturing337110 | 1-19 | ◇ UNVERIFIED |
| MPMaster Precision Global LLC | Greenville | MI | Plastics and Rubber Products Manufacturing326130 | 20-99 | ◇ UNVERIFIED |
| MCMathy Construction Company - Plant 25 | Onalaska | MI | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| MCMathy Construction CO Plant 24 | Ironwood | MI | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| MCMathy Construction CO Plant 41 | Ironwood | MI | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| MTMaverick Tube Corporation | Ferndale | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MCMax Casting Co-benton Harbor | Benton Harbor | MI | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| MNMcc - Norway INC | Norway | MI | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| MSMclouth Steel Gibraltar Plant | Gibraltar | MI | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| MAMedtec Ambulance CORP | White Pigeon | MI | Transportation Equipment Manufacturing336211 | — | ◇ UNVERIFIED |
| MEMelco Engraving INC | Rochester Hills | MI | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| MFMelling Forging CO | Lansing | MI | Fabricated Metal Product Manufacturing332111 | — | ◇ UNVERIFIED |
| MFMelody Farms LLC | Detroit | MI | Food Manufacturing311520 | — | ◇ UNVERIFIED |
| MPMenasha Packaging Company,llc - Coloma Plant | Coloma | MI | Paper Manufacturing322211 | — | ◇ UNVERIFIED |
| MMMerchants Metals | Howell | MI | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| MPMeridian Pr0ducts of America | Eaton Rapids | MI | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| MIMerillat Industries Incorporated | Adrian | MI | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| MHMeritor - Howell | Howell | MI | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| MCMetal Components INC | Wyoming | MI | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| MPMetaldyne Precision Forming | Detroit | MI | Fabricated Metal Product Manufacturing332111 | — | ◇ UNVERIFIED |
 Metalor Technologies USA | Port Huron | MI | Chemical Manufacturing325910 | — | ◇ UNVERIFIED |
| MMetalution | Holland | MI | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MLMetavation LLC | Mount Pleasant | MI | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| MLMetavation, LLC | Traverse City | MI | Transportation Equipment Manufacturing336310 | — | ◇ UNVERIFIED |
| MCMetokote Corporation, Plant 16 | Lapeer | MI | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| MLMettek LLC | Allendale | MI | Printing and Related Support Activities323113 | 1-19 | ◇ UNVERIFIED |
| MCMetzgar Conveyor CO | Comstock Park | MI | Machinery Manufacturing333922 | — | ◇ UNVERIFIED |
| MHM & H Industries INC | Livonia | MI | Fabricated Metal Product Manufacturing332119 | — | ◇ UNVERIFIED |
| MEMich Extruded Aluminum-jackson | Jackson | MI | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| MGMich Gypsum CO | Whittemore | MI | Nonmetallic Mineral Product Manufacturing327420 | — | ◇ UNVERIFIED |
| MAMichigan Asphalt | Middleville | MI | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| MCMichigan Chrome & Chemical Company | Detroit | MI | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| MCMichigan Coating Products INC | Wyoming | MI | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| MCMichigan Critial Care Consultants, INC. | Dexter | MI | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| MCMichigan Custom Packaging, LLC | Grand Rapids | MI | Paper Manufacturing322219 | — | ◇ UNVERIFIED |
