Alphabetical company index for letter/character "O", page 13 of 22
- Oplink Communications Inc.
- OPMEDIC Group Inc.
- OPNET Technologies Inc.
- Opnext Inc.
- Opower Inc.
- Opp City School District
- Oppenheim-Ephratah-St. Johnsville Central School District
- Oppenheimer Holdings Inc.
- Opta Minerals Inc.
- OpTech
- Optelecom-NKF Inc.
- Optibase Ltd.
- Optical Cable Corp.
- Optical Sciences Corporation
- OpticsPlanet
- Optim Medical Center - Jenkins
- Optim Medical Center - Screven
- Optim Medical Center - Tattnall
- Optima Associates
- Optima School District
- Optimal Group Inc.
- Optimal Solutions & Technologies
- Optimal Solutions Group
- Optimer Pharmaceuticals Inc.
- Optimum Design Associates
- Optimum Technology Solutions
- OptimumBank Holdings Inc.
- OptiNose
- Option Six
- Options University
- optionsXpress Holdings Inc.
- Optium Corp.
- Optum
- Opus Bank
- OR-Live
- Oracle Corp.
- Oracle Elementary District
- Oracle Mining Corp
- Oracle Packaging
- Oradell School District