P
PACCAR Inc.
Parker Hannifin Corporation
Pearson Education - yes, no form
Pentair Inc.
Peoples Gas
PepsiCo, Inc.
Peterbilt Motors Company
Pfizer, Inc.
Philips Medical Systems North America Co. 
Phillips 66 Company
PIMCO Foundation
Pitney Bowes, Inc.
PNC Financial Services Group
PNM Resources Inc.
PPG Industries, Inc.
Preformed Line Products Company
Principal Financial Group
Procter & Gamble
Progressive Insurance
PSEG
 
Q
Qualcomm
Quest Diagnostics, Inc.
Quintiles Transnational

R

Radian Group, Inc.
Radio Shack Corporation
Rand McNally & Company
Raytheon Company
RBC Dain Rauscher
Reader's Digest Foundation
Red Lobster Restaurant
Reed Elsevier Inc.
RHI Robert Half International Inc.
Roche Laboratories Inc.
The Rockefeller Foundation
Rockwell Automation Trust
Rohm and Haas Company
Russell Corporation

S
Sage Products Inc.
SAIC
Saint-Gobain Corporation
The Sallie Mae Fund
The Samuel Roberts Noble Foundation, Inc
Sanofi-Aventis U.S.
SAP America, Inc.
SC Johnson Wax
Schering-Plough Corporation
Science Applications International Corp.
Scitor Corporation
Scripps Howard Foundation
SeaWorld
Seitel, Inc.
SemGroup, L.P.
Sempra Energy
Shell Oil Company
The Sherwin-Williams Company
Siecor Corporation
Silicon Laboratories, Inc.
Sony
Soros Fund Management
Spectra Energy Corporation
Sprint Nextel
SPX Corporation
Stanley
Starbucks
State Farm Insurance Company
State Mutual Life Assurance Company
State Street Bank and Trust Company
Steelcase, Inc. North America
Subaru of America Inc.
Sun Life Financial
Symantec Corporation
 
T
Tellabs, Inc.
Temple-Inland, Inc.
TEPPCO Texas Eastern Products Pipeline
Tesoro Petroleum Corporation
Texas Instruments
Textron Inc.
Thrivent Financial for Lutherans
Toyota Motor Sales, U.S.A., Inc.
Tribune Co.
Tyco International