This is from their website.

Funders
Aetna Foundation
AFL-CIO
AFSCME
Alcoa Foundation
The Allstate Foundation
American Airlines
American Express Foundation
America’s Charter School Finance Corporation
Anheuser-Busch Companies
Annie E. Casey Foundation
Bank of America
Bill & Melinda Gates Foundation
The Bridgestone/Firestone Trust Fund
The California Endowment
Carnegie Corporation of New York
Caterpillar Foundation
Charles Stewart Mott Foundation
ChevronTexaco
Citigroup
Coors Brewing Company
Corporation for National and Community Service
The Cummins Foundation
DaimlerChrysler Corporation Fund
The David and Lucile Packard Foundation
E.I. Du Pont de Nemours and Company
Eastman Kodak Company
Entergy Charitable Foundation
Ewing Marion Kauffman Foundation
Fannie Mae Corporation
Fannie Mae Foundation
FedEx Corporation
First Data Western Union Foundation
Ford Foundation
Ford Motor Company Fund
The Fred R. Fernandez - Irma R. Rodriguez Foundation, Inc.
Freddie Mac Corporation
Freddie Mac Foundation
Friedrich Ebert Foundation
General Mills, Inc.
Hess Foundation, Inc.
Hilton Hotels Corporation
Home Depot, Inc.
Inter-American Foundation
The Joyce Foundation
IBM
The J.P. Morgan Chase Foundation
The J. Willard and Alice S. Marriott Foundation
Job Corps
John D. and Catherine T. MacArthur Foundation
Johnson & Johnson
Kaiser Family Foundation
The Kroger Company
Levi Strauss & Co.
Lockheed Martin Corporation
Lucent Technologies Foundation
The Lynde and Harry Bradley Foundation
MBNA
Mehri & Skalet, PLLC
Mertz Gilmore Foundation
MetLife Foundation
DTE Energy Foundation
Microsoft Corporation
Motorola Foundation
NASA
NEA
Nike Foundation
Novo Nordisk Pharmaceuticals
Office of the Illinois Attorney General
Open Society Institute
PepsiCo, Inc.
Pfizer Inc.
PG&E Corporation
The Procter & Gamble Fund
Procter & Gamble
Prudential Foundation
The Rockefeller Foundation
Rockwell Automation
Rosenberg Foundation
The Sallie Mae Fund
Sears, Roebuck and Co.
Starbucks Coffee Company
Time Warner Foundation
Toyota USA Foundation
U.S. Department of Commerce
U.S. Department of Education
U.S. Department of Health and Human Services
U.S. Department of Housing and Urban Development
U.S. Department of Labor
The UPS Foundation
United Airlines Foundation
USAA Federal Savings Bank
Valassis Giving Committee
Verizon Foundation
W.K. Kellogg Foundation
Wal-Mart Stores, Inc.
The Walton Family Foundation
Wells Fargo
Western Union
The William Randolph Hearst Foundations
Wilmer Cutler Pickering LLP
The Xerox Foundation