- Pfizer, Inc.
- Pinnaclife, Inc.
- Pioneer Technology
- Plasti-Products, Inc.
- Power Distributors
- Power-Web
- Practicon
- Premier Biotech
- PrePak Products, Inc.
- Prestige Ameritech
- Price Chopper Medical
- Principle Business Enterprises
- Principle Business Enterprises/Incontinence
- Pro Advantage
- Pro Band Sports
- Procter & Gamble Distributing LLC
- Proctor & Gamble Distributing LLC
- ProDrive Systems
- ProEdge Dental Products
- ProStat First Aid, LLC
- PTS Diagnostics
- Pulpdent
- Puriti Labs
- Quala
- Quidel Corporation