P-R
- PACCAR, Inc./Peterbilt
- Panhandle Eastern Corporation
- Parkland Memorial Hospital
- KPMG Peat Marwick Main Hurdman
- Pegasus Solutions
- Prudential Insurance Company
- Post Oak Bank of Houston
- Raytheon
- Rice University
S
- Sammons Corporation
- Sarasota County, Florida
- SCOR Reinsurance Company
- Southland Life Insurance Company
- Southern Methodist University
- Southwestern Bell Telephone Company
- Sprint
- Staubach
- State of Florida Board of Regeants
- State of Texas
- Steak & Ale Corporation