| OWOakley - Warren | Warren | MI | Transportation Equipment Manufacturing336390 | 20-99 | ◐ LIKELY ACTIVE |
| OCOgura Corporation | Chesterfield Township | MI | Transportation Equipment Manufacturing336350 | 20-99 | ◐ LIKELY ACTIVE |
| OIOpti-Luxx, Inc. | Hudsonville | MI | Transportation Equipment Manufacturing336320 | 20-99 | ◐ LIKELY ACTIVE |
| OSOrbion Space Technology Inc. | Houghton | MI | Transportation Equipment Manufacturing336415 | 20-99 | ◐ LIKELY ACTIVE |
| PDPallad Defense LLC | Auburn Hills | MI | Transportation Equipment Manufacturing336411 | — | ◐ LIKELY ACTIVE |
| PAParker Americas Inc. | Novi | MI | Transportation Equipment Manufacturing336390 | 1-19 | ◐ LIKELY ACTIVE |
| PSPerformance Seats Clinton, Inc. | Clinton Township | MI | Transportation Equipment Manufacturing336360 | 100-499 | ◐ LIKELY ACTIVE |
P. G. S. INC | Troy | MI | Transportation Equipment Manufacturing336350 | — | ◐ LIKELY ACTIVE |
| PIPiston Interiors LLC | Pontiac | MI | Transportation Equipment Manufacturing336360 | — | ◐ LIKELY ACTIVE |
| PIPiston Interiors Pontiac LLC | Pontiac | MI | Transportation Equipment Manufacturing336360 | 20-99 | ◐ LIKELY ACTIVE |
| P1Plant 1 | Sterling Heights | MI | Transportation Equipment Manufacturing336390 | 20-99 | ◐ LIKELY ACTIVE |
| P2Plant 2 | Sterling Heights | MI | Transportation Equipment Manufacturing336390 | 20-99 | ◐ LIKELY ACTIVE |
| PUPlasan Us, INC. | Grand Rapids | MI | Transportation Equipment Manufacturing336992 | — | ◐ LIKELY ACTIVE |
Plascore, INC | Zeeland | MI | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
| POPlastic Omnium - Adrian | Adrian | MI | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| POPlastic Omnium Huron | New Boston | MI | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| PRPlymouth R&D | Plymouth | MI | Transportation Equipment Manufacturing336211 | 20-99 | ◐ LIKELY ACTIVE |
| PTPmas Technologies LLC | Eaton Rapids | MI | Transportation Equipment Manufacturing336390 | — | ◐ LIKELY ACTIVE |
| PAPontiac Automation & Assembly (Challenge Manufacturing-Plant 8) | Pontiac | MI | Transportation Equipment Manufacturing336370 | 100-499 | ◐ LIKELY ACTIVE |
| PEPontiac Engineering Center | Pontiac | MI | Transportation Equipment Manufacturing336350 | 500+ | ◐ LIKELY ACTIVE |
| PMPraetorian Manufacturing INC | Niles | MI | Transportation Equipment Manufacturing336370 | — | ◐ LIKELY ACTIVE |
| PWPratt & Whitney Component Solutions, INC. | Norton Shores | MI | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| PWPress Way | Clinton Twp | MI | Transportation Equipment Manufacturing336370 | 20-99 | ◐ LIKELY ACTIVE |
Pridgeon & Clay - 1111 Wallen | Grand Rapids | MI | Transportation Equipment Manufacturing336370 | 20-99 | ◐ LIKELY ACTIVE |
Pridgeon & Clay - 158 Cottage Grove | Grand Rapids | MI | Transportation Equipment Manufacturing336370 | 20-99 | ◐ LIKELY ACTIVE |
| PMProfile Metal Forming | Potterville | MI | Transportation Equipment Manufacturing336370 | 20-99 | ◐ LIKELY ACTIVE |
Progressive Metal Manufacturing | Ferndale | MI | Transportation Equipment Manufacturing336370 | 20-99 | ◐ LIKELY ACTIVE |
| PPurem | Brighton | MI | Transportation Equipment Manufacturing336390 | 500+ | ◐ LIKELY ACTIVE |
| PNPurem Novi | Novi | MI | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| PWPurem Wixom | Wixom | MI | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| PPPyramid Peak Coatings | Owosso | MI | Transportation Equipment Manufacturing336390 | 20-99 | ◐ LIKELY ACTIVE |
| RRawsonville | Ypsilanti | MI | Transportation Equipment Manufacturing336390 | 500+ | ◐ LIKELY ACTIVE |
| RBRobert Bosch LLC | Saint Joseph | MI | Transportation Equipment Manufacturing336340 | 100-499 | ◐ LIKELY ACTIVE |
| RHRochester Hill Technical Center | Rochester | MI | Transportation Equipment Manufacturing336350 | 100-499 | ◐ LIKELY ACTIVE |
| RRomulus | Romulus | MI | Fabricated Metal Product Manufacturing332722 | 100-499 | ◐ LIKELY ACTIVE |
| RGRomulus GPS | Romulus | MI | Transportation Equipment Manufacturing336310 | 500+ | ◐ LIKELY ACTIVE |
| RIRoseville ITU | Roseville | MI | Transportation Equipment Manufacturing336211 | 20-99 | ◐ LIKELY ACTIVE |
| RLRsdc Lcc | Holt | MI | Transportation Equipment Manufacturing336370 | 100-499 | ◐ LIKELY ACTIVE |
| RERummell Enterprises, INC. | Lenox | MI | Transportation Equipment Manufacturing336992 | — | ◐ LIKELY ACTIVE |
| SESA Engineering | Livonia | MI | Transportation Equipment Manufacturing336111 | 1-19 | ◐ LIKELY ACTIVE |
Salient Motion, INC | Saginaw | MI | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
| SCSchaller Corporation Plant 3 | Chesterfield | MI | Transportation Equipment Manufacturing336370 | 20-99 | ◐ LIKELY ACTIVE |
| SCSchaller Corporation Plant 4 | Chesterfield | MI | Transportation Equipment Manufacturing336370 | 20-99 | ◐ LIKELY ACTIVE |
| SCShape Corp - 1820 Hayes | Grand Haven | MI | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| SCShape Corp - 1825 Industrial Dr. | Grand Haven | MI | Transportation Equipment Manufacturing336390 | 1-19 | ◐ LIKELY ACTIVE |
| SCShape Corp - 1835 Hayes | Grand Haven | MI | Transportation Equipment Manufacturing336390 | 20-99 | ◐ LIKELY ACTIVE |
| SCShape Corp - 1835 Industrial Dr. | Grand Haven | MI | Transportation Equipment Manufacturing336390 | 20-99 | ◐ LIKELY ACTIVE |
| SCShape Corp - 1845 Industrial Dr. | Grand Haven | MI | Transportation Equipment Manufacturing336390 | 1-19 | ◐ LIKELY ACTIVE |
| SCShape Corp - 1900 Hayes | Grand Haven | MI | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| SCShape Corp - Comstock | Grand Haven | MI | Transportation Equipment Manufacturing336390 | 20-99 | ◐ LIKELY ACTIVE |