- Pennsylvania Psychiatric Institute
- Perkins Eastman Architects PC of Pennsylvania
- Perry County Commissioner Office
- Pfaffmann + Associates PC
- Philadelphia Chinatown Development Corporation
- Philadelphia Convention and Visitors Bureau
- Philadelphia Flyers
- Philadelphia Marriott
- Philadelphia Phillies
- Phoebe Home
- Phoebe Ministries
- Phoenix Rehabilitation and Health Services
- Phoenixville Hospital - Tower Health
- Pike County
- Pike County Chamber of Commerce
- Pine Run Community
- Pinnacle Associations
- Pinnacle Health System
- Pinnacle Health System
- Pinpoint Protective Service
- Pitt-Ohio Express
- Pitts Logistics Systems
- Pittsburgh - Renaissance Hotel
- Pittsburgh AIDS Task Force
- Pittsburgh Automobile Trade Association
- Pittsburgh Center for the Arts
- Pittsburgh Marriott North, Cranberry, PA
- Pittsburgh Opera
- Pittsburgh Parks Conservancy
- Pittsburgh Society of Association Executives
- Pittsburgh Symphony
- Pittsburgh UA
- Pittsburgh Zoo
- Plasterers Local 31
- Pleasant Ridge Manor
- PNC Financial Services Group
- Pocono Medical Center
- Point Park University
- Pottstown Memorial Medical Center
- PPG Industries Inc.
- PPL
- PREIT - Pennsylvania Real Estate Investment Trust
- Premier Research
- Premier Technologies Inc.
- Premier Therapy Services
- PresbyHomes and Services
- Presbyterian Health Center
- Presbyterian Homes in the Presbytery of Huntingdon
- Presbyterian Seniorcare
- Presbytery Homes Inc.