| MMMold-tech Michigan | Fraser | MI | Printing and Related Support Activities323122 | 20-99 | ◐ LIKELY ACTIVE |
| MCMono Ceramics, INC | Benton Harbor | MI | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| MIMonroe INC | Kentwood | MI | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| MTMonroe Truck Equipment | Flint | MI | Transportation Equipment Manufacturing336110 | 20-99 | ◐ LIKELY ACTIVE |
| MSMorton Salt | Manistee | MI | Food Manufacturing311942 | — | ◐ LIKELY ACTIVE |
| MPMotor Products Corporation | Owosso | MI | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◐ LIKELY ACTIVE |
| MSMpt Sterling Heights | Sterling Heights | MI | Transportation Equipment Manufacturing336350 | 100-499 | ◐ LIKELY ACTIVE |
| MPMulti Precision Detail | Auburn Hills | MI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| NANational Aircraft Service INC | Tecumseh | MI | Transportation Equipment Manufacturing336413 | 1-19 | ◐ LIKELY ACTIVE |
| NCNeogen CORP | Lansing | MI | Chemical Manufacturing325413 | 500+ | ◐ LIKELY ACTIVE |
| NCNeuvokas Corporation | Ahmeek | MI | Nonmetallic Mineral Product Manufacturing327999 | — | ◐ LIKELY ACTIVE |
| NHNew Holland Brewing Production Campus | Holland | MI | Beverage and Tobacco Product Manufacturing312120 | 20-99 | ◐ LIKELY ACTIVE |
| NANorth American Mold LLC | Auburn Hills | MI | Plastics and Rubber Products Manufacturing326199 | 1-19 | ◐ LIKELY ACTIVE |
| NCNorthland CORP | Greenville | MI | Machinery Manufacturing333415 | 100-499 | ◐ LIKELY ACTIVE |
| NSNorth Star Steel CO | Monroe | MI | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| NINumatics INC | Sandusky | MI | Fabricated Metal Product Manufacturing332911 | — | ◐ LIKELY ACTIVE |
| OCOakwood Custom Coating | Taylor | MI | Fabricated Metal Product Manufacturing332812 | 100-499 | ◐ LIKELY ACTIVE |
| OMOerlikon Metco - Plymouth | Plymouth | MI | Primary Metal Manufacturing331492 | 20-99 | ◐ LIKELY ACTIVE |
| OEOld Europe Cheese, INC. | Benton Harbor | MI | Food Manufacturing311513 | 20-99 | ◐ LIKELY ACTIVE |
| OWOne Way Products, Inc. | Kalamazoo | MI | Chemical Manufacturing325611 | 20-99 | ◐ LIKELY ACTIVE |
On the Mark INC | Mount Pleasant | MI | Fabricated Metal Product Manufacturing332999 | 1-19 | ◐ LIKELY ACTIVE |
| OIOpti-Luxx, Inc. | Hudsonville | MI | Transportation Equipment Manufacturing336320 | 20-99 | ◐ LIKELY ACTIVE |
| OMOrion Manufacturing INC | Ionia | MI | Machinery Manufacturing333517 | 20-99 | ◐ LIKELY ACTIVE |
| OPOscoda Plastics | Oscoda | MI | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| OPOtsego Paper INC | Otsego | MI | Paper Manufacturing322120 | — | ◐ LIKELY ACTIVE |
| OPOx Paperboard Wp Mill, LLC | White Pigeon | MI | Paper Manufacturing322121 | — | ◐ LIKELY ACTIVE |
| PCPackers Canning CO INC | Lawton | MI | Food Manufacturing311421 | 20-99 | ◐ LIKELY ACTIVE |
| PIPaladin Ind INC | Kentwood | MI | Furniture and Related Product Manufacturing337211 | 20-99 | ◐ LIKELY ACTIVE |
| PPPanel Processing INC | Alpena | MI | Furniture and Related Product Manufacturing337215 | 20-99 | ◐ LIKELY ACTIVE |
Par Health USA | Rochester | MI | Chemical Manufacturing325412 | 500+ | ◐ LIKELY ACTIVE |
| PPPDS Plastics, Inc. | Dorr | MI | Machinery Manufacturing333248 | 20-99 | ◐ LIKELY ACTIVE |
| PIPerfecto Industries, Inc. - Gaylord | Gaylord | MI | Machinery Manufacturing333519 | 20-99 | ◐ LIKELY ACTIVE |
Perigee Manufacturing CO INC | Detroit | MI | Fabricated Metal Product Manufacturing332722 | 1-19 | ◐ LIKELY ACTIVE |
| PUPharmacia & Upjohn Company, LLC. | Portage | MI | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| PJPhillips & Johnston INC Dba River Rock Fabrication | Grand Rapids | MI | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| PFPierino Frozen Foods INC | Lincoln Park | MI | Food Manufacturing311412 | 20-99 | ◐ LIKELY ACTIVE |
| PMPioneer Metal Finishing - Stephens Road | Warren | MI | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| PTPlastic Trim LLC | East Tawas | MI | Machinery Manufacturing333248 | 100-499 | ◐ LIKELY ACTIVE |
| PLPotlatchdeltic Land & Lumber LLC. (n5940) | Gwinn | MI | Wood Product Manufacturing321113 | — | ◐ LIKELY ACTIVE |
| PEPrecision Edge Surgical Products CO LLC | Sault Sainte Marie | MI | Miscellaneous Manufacturing339112 | — | ◐ LIKELY ACTIVE |
| PJPrecision Jig & Fixture INC | Rockford | MI | Machinery Manufacturing333514 | 20-99 | ◐ LIKELY ACTIVE |
| PMPrecision Metal Spinning | Fenton | MI | Fabricated Metal Product Manufacturing332116 | 20-99 | ◐ LIKELY ACTIVE |
| PPPrecision Polymer Manufacturing INC | Kalamazoo | MI | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| PPPreferred Plastics | Plainwell | MI | Plastics and Rubber Products Manufacturing326121 | 20-99 | ◐ LIKELY ACTIVE |
| PGPremier Granite and Stone | Grandville | MI | Nonmetallic Mineral Product Manufacturing327991 | 100-499 | ◐ LIKELY ACTIVE |
| PIPrintcomm INC | Flint | MI | Printing and Related Support Activities323111 | 100-499 | ◐ LIKELY ACTIVE |
| PProampac | Manistique | MI | Paper Manufacturing322120 | — | ◐ LIKELY ACTIVE |
| PFProfessional Fabricating Inc. | Wyoming | MI | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| PLPrototech Laser, Inc. | Chesterfield | MI | Fabricated Metal Product Manufacturing332999 | 20-99 | ◐ LIKELY ACTIVE |
| PMProto-tek Manufacturing, INC | Roseville | MI | Transportation Equipment Manufacturing336992 | 20-99 | ◐ LIKELY ACTIVE |