| 1 (160) | National Bureau of Economic Research | USA |  |
| 2 (381) | Institute for Advanced Study | USA | |
| 3 (387) | American Institute of Aeronautics and Astronautics | USA | |
| 4 (396) | Kavli Institute for Particle Astrophysics and Cosmology | USA | |
| 5 (408) | Santa Fe Institute | USA | |
| 6 (429) | Carnegie Institution for Science | USA | |
| 7 (448) | International Computer Science Institute | USA | |
| 8 (574) | Regenstrief Institute | USA | |
| 9 (633) | Woods Hole Oceanographic Institution | USA | |
| 10 (650) | Perimeter Institute for Theoretical Physics | CAN | |
| 11 (651) | RAND Corporation | USA | |
| 12 (797) | Marine Biological Laboratory | USA | |
| 13 (857) | SETI Institute | USA | |
| 14 (888) | SRI International | USA | |
| 15 (1059) | Wildlife Conservation Society USA | USA | |
| 16 (1302) | Monterey Bay Aquarium Research Institute | USA | |
| 17 (1598) | Desert Research Institute, Reno | USA | |
| 18 (1715) | International Monetary Fund | USA | |
| 19 (1882) | Educational Testing Service | USA | |
| 20 (2044) | Universities Space Research Association | USA | |
| 21 (2625) | Southwest Research Institute | USA | |
| 22 (2845) | Louisiana State University Agricultural Center | USA | |
| 23 (3135) | Battelle Memorial Institute | USA | |
| 24 (3879) | Electric Power Research Institute | USA | |
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