| NineSigma Inc. | Cleveland, Ohio, United States |
| Nion | Kirkland, Washington, United States |
| NIOSH | Cincinnati, Ohio, United States |
| Nissan Chemical America Corporation | Houston, Texas, United States |
| NIST - Center for Nanoscale Science and Technology | Gaithersburg, Maryland, United States |
| Nite Technology OÜ | Tallinn, Estonia |
| Nitrate Elimination Company Inc. | Lake Linden, Michigan, United States |
| NjeX Medical Systems Inc. | Lake Arrowhead, California, United States |
| NKK Steel Engineering Inc. | Mars, Pennsylvania, United States |
| nLake Technology Partners LLC | Chicago, Illinois, United States |