- Annie E. Casey Foundation
- Bill & Melinda Gates Foundation
- Commonwealth Fund
- David and Lucile Packard Foundation
- Ewing Marion Kauffman Foundation
- Ford Foundation
- Golden Bottle Trust
- James Irvine Foundation
- John D. and Catherine T. MacArthur Foundation
- JP Morgan Chase & Co.
- Meyer Memorial Trust
- Open Road Alliance
- Robert Wood Johnson Foundation
- Rockefeller Foundation
- Surdna Foundation
