- Pacific Life Insurance
- Pacifica Hospital of the Valley
- Palmdale Regional Medical Center
- Palo Verde Medical Center
- Palomar Medical Center
- Palomar Medical Center Poway
- PALS for Health
- Panattoni Construction
- Paradise Valley Hospital
- Paragon Biomedical
- Paramedics, Inc.
- Park Central Hotel San Francisco
- Parkeon
- Parkview Community Hospital Medical Center
- Pasadena Convention and Visitors Bureau
- PC Profiles
- Peggy Heller Elementary School
- Pepsi Bottling Company
- PERC
- Perma
- PGandE Corp.
- Pharmacy Board
- PIH Health Hospital - Downey
- PIH Health Hospital - Whittier
- Pioneers Memorial Healthcare District
- Placentia-Linda Hospital
- Placer County
- PlanetBids
- Planisware
- Pomona Valley Hospital Medical Center
- Portola Plaza Hotel
- Pribuss Engineering, Inc.
- Pride Industries
- Promedica International
- Promise Hospital East Los Angeles - Suburban Medical Center Campus
- Promise Hospital of San Diego
- Promos Express
- ProTrials
- Providence Cedars-Sinai Tarzana Medical Center
- Providence Health and Services, Los Angeles County
- Providence Holy Cross Medical Center
- Providence Little Company of Mary Medical Center San Pedro
- Providence Little Company of Mary Medical Center Torrance
- Providence Saint John's Health Center
- Providence Saint Joseph Medical Center
- Providence St. Joseph Hospital
- Providence St. Jude Hospital
- Providence St. Jude Medical Center
- Providence St. Mary Medical Center - Apple Valley
- Providence Tarzana Medical Center