Businesses and Occupations
- ORIX Corp
- OshKosh BGosh Inc
- Otis Elevator Company Inc
- Otto-Versand (GmbH & Co.)
- Outback Steakhouse Inc
- Outboard Marine Corp
- Outsourcing
- Overtime
- Owens & Minor, Inc.
- Owens-Illinois Inc
- Oxford Industries Inc
- P. H. Glatfelter Company
- P.F. Changs China Bistro Inc
- PACCAR Inc
- PacifiCorp
- Packaging Corp. of America
- Pall Corp
- Palm Inc
- Pan American World Airways Inc
- Papa Johns International Inc