| Company | Location |
|---|---|
| Ultra T Equipment Co. | Fremont, California, United States |
| Ultrafine Technologies Inc. | Newark, Delaware, United States |
| Ultrasonic Systems, Inc | Haverhill, Massachusetts, United States |
| Ultratech Inc. | San Jose, California, United States |
| ULVAC Technologies Inc. | Methuen, Massachusetts, United States |
| Umachines Inc. | Altadena, California, United States |
| umedik Inc. | Toronto, Ontario, Canada |
| Umicore Semiconductor Processing | Raleigh, North Carolina, United States |
| Unaxis Semiconductors | St. Petersburg, Florida, United States |
| Uni-Technologies Sdn Bhd | Skudai, Johor, Malaysia |
