| Company | Location |
|---|---|
| OmniParticles | Seoul, Korea |
| Omniprobe Inc. | Dallas, Texas, United States |
| Omron Electronics LLC | Schaumburg, Illinois, United States |
| ONAMI Inc. | Eugene, Oregon, United States |
| Onyx Software Corp. | Bellevue, Washington, United States |
| Opalux Inc. | Toronto, Ontario, Canada |
| Oppenheimer Wolff & Donnelly LLP | Minneapolis, Minnesota, United States |
| Opportunity Houston - Greater Houston Partnership | Houston, Texas, United States |
| Optenso | Holzhausen/Ignling, Germany |
| Opti-Logic Corp. | Tullahoma, Tennessee, United States |
