- Profitability Quality Security
- Programa de Transplante de Corazon, Centro Cardiovascular de Puerto Rico y del Caribe
- Progress Financial Corp.
- Progressive
- Progressive Education Center
- Prohealth Ocnomomowoc Memorial Hospital
- ProHealth Waukesha Memorial Hospital
- Project Access
- Project Hope
- Project Impact Augusta- East Central Health District
- Project Management Institute
- Project Resilience
- Project Ship - School Health Integrated Programs
- Projection Presentation Technology
- Prologue Research
- Promac, Inc.
- ProMedica Bay Park Hospital
- ProMedica Charles & Virginia Hickman Hospital
- ProMedica Flower Hospital
- Promedica International
- ProMedica Toledo Hospital and Toledo Children's Hospital
- Promise Hospital East Los Angeles - Suburban Medical Center Campus
- Promise Hospital of San Diego
- Promiseland Ministy
- Promos Express
- Promotion Marketing Association
- Promotional Products Association International
- Prost Executives
- Protect Alert Emergency Response Systems, Inc.
- Protherm Services Group LLC
- ProTrials
- Providence Behavioral Health Hospital
- Providence Cedars-Sinai Tarzana Medical Center
- Providence Community Health Centers
- Providence Engraving Inc.
- Providence Extended Care Center
- Providence Health and Services, Los Angeles County
- Providence Health Center
- Providence Health System
- Providence Health-Northeast
- Providence Holy Cross Medical Center
- Providence Hospital
- Providence Hospital
- Providence Hospital
- Providence Hospital Medical Center
- Providence Life Services
- Providence Life Services Village Woods
- Providence Little Company of Mary Medical Center San Pedro
- Providence Little Company of Mary Medical Center Torrance
- Providence Medical Center