| Company | Booth | |
| Marioff North America | 513 | |
| Martech Training Services | 337 | |
| Martin Engineering | 301 | |
| Matrix NAC | 541 | |
| Metso Minerals Industries Inc. | 322 | |
| Middough Inc. | 334 | |
| Midwest Industrial Supply Inc | 123 | |
| MinTech | 200 | |
| Miron Construction Co., Inc. | 601 | |
| Mitsubishi Heavy Industries | 732 | |
| Mitsubishi Hitachi Power Systems | 409 | |
| MPW Industrial Services Inc. | 616 | |
