- National Disease Research Interchange
- Nemacolin Woodlands Resort and Spa
- Neo Gen Screening
- Neville Chemical Company
- New Enterprise Stone and Lime Company, Inc.
- NikoNET
- Nobel Learning Communities, Inc.
- Noelker And Hull Associates, Inc.
- Nolf Chrysler Dodge, Inc.
- NOMOS Corporation
- North American Communications
- North Side Christian Health Center
- Nutri-System, Inc.
- Nutrition Management Services Company
- OBGyn of Lancaster, Inc.
- Ohio Valley General Hospital
- Oncology Nursing Society
- Oxford Development Company
- PA American Water Company, Pittsburgh Operations
- PA Capital Regions Vacation Bureau
- PANPHA
- Paoli Hospital
- Parente Randolph PC
- Passavant Community
- Paul's Run
- PC Network Services
- Pegasus Communications Corp.
- Penn Engineering and Manufacturing Co.
- Penn Highlands Brookville
- Penn Highlands Clearfield
- Penn Highlands DuBois
- Penn Highlands Elk Regional
- Penn Independent, Corp.
- Penn Presbyterian Medical Center
- Penn State Behrend
- Penn State Behrend SNA
- Penn State Milton S. Hershey Medical Center
- Penn United Technology, Inc.
- Pennknoll Village
- Pennswood Village
- Pennsylvania Academy of Family Physicians
- Pennsylvania Alliance for Association Advancement
- Pennsylvania Association of Community Bankers
- Pennsylvania Association of Community Health Centers
- Pennsylvania Automotive Association
- Pennsylvania Convention Center Authority
- Pennsylvania Department of Health
- Pennsylvania Dutch Convention and Visitors Bureau
- Pennsylvania Hospital - Penn Medicine
- Pennsylvania Music Educators Association