| 1 (218) | National Bureau of Economic Research | USA |  |
| 2 (427) | Institute for Advanced Study | USA | |
| 3 (474) | American Institute of Aeronautics and Astronautics | USA | |
| 4 (495) | Carnegie Institution for Science | USA | |
| 5 (504) | Kavli Institute for Particle Astrophysics and Cosmology | USA | |
| 6 (613) | Santa Fe Institute | USA | |
| 7 (679) | Bill and Melinda Gates Foundation | USA | |
| 8 (700) | Regenstrief Institute | USA | |
| 9 (749) | Woods Hole Oceanographic Institution | USA | |
| 10 (766) | RAND Corporation | USA | |
| 11 (864) | SETI Institute | USA | |
| 12 (1041) | Marine Biological Laboratory | USA | |
| 13 (1134) | SRI International | USA | |
| 14 (1210) | Wildlife Conservation Society USA | USA | |
| 15 (1435) | Planetary Science Institute | USA | |
| 16 (1741) | International Monetary Fund | USA | |
| 17 (1928) | Desert Research Institute, Reno | USA | |
| 18 (1935) | Universities Space Research Association | USA | |
| 19 (2710) | Louisiana State University Agricultural Center | USA | |
| 20 (2877) | Southwest Research Institute | USA | |
| 21 (3386) | Battelle Memorial Institute | USA | |
| 22 (3882) | Electric Power Research Institute | USA | |
|
