| 1 (800) | SRI International | USA |  |
| 2 (986) | Bill and Melinda Gates Foundation | USA | |
| 3 (1376) | American Heart Association | USA | |
| 4 (1553) | Santa Fe Institute | USA | |
| 5 (2104) | RAND Corp | USA | |
| 6 (2338) | United Nations International Children's Emergency Fund, United States | USA | |
| 7 (2680) | National Bureau of Economic Research | USA | |
| 8 (2702) | Population Council, USA | USA | |
| 9 (2755) | Walter Reed Army Institute of Research * | USA | |
| 10 (2847) | Family Health International * | USA | |
| 11 (3184) | International Food Policy Research Institute United States | USA | |
| 12 (3268) | Regenstrief Institute | USA | |
| 13 (4185) | World Bank, United States | USA | |
| 14 (4693) | Outcomes Research Consortium | USA | |
|
