| Company | Location |
|---|---|
| IoLiTec Inc. | Tuscaloosa, Alabama, United States |
| Iolon Inc. | San Jose, California, United States |
| Iomai Corp. | Gaithersburg, Maryland, United States |
| Ion Optics Inc. | Waltham, Massachusetts, United States |
| Ionwerks | Houston, Texas, United States |
| IOP Publishing, Inc. | Philadelphia, Pennsylvania, United States |
| Iowa State University - Laboratory for Lasers, MEMS and Nanotechnology | Ames, Iowa, United States |
| IPG Corporation | Charleston, South Carolina, United States |
| IQN | Montreal, Quebec, Canada |
| Iridigm Display Corp. | San Francisco, California, United States |
