| 1 (383) | National Bureau of Economic Research | USA |  |
| 2 (551) | Santa Fe Institute | USA | |
| 3 (611) | International Computer Science Institute | USA | |
| 4 (645) | American Institute of Aeronautics and Astronautics | USA | |
| 5 (692) | Carnegie Institution for Science | USA | |
| 6 (718) | Institute for Advanced Study | USA | |
| 7 (760) | SRI International | USA | |
| 8 (874) | Woods Hole Oceanographic Institution | USA | |
| 9 (1035) | Kavli Institute for Particle Astrophysics and Cosmology | USA | |
| 10 (1103) | Regenstrief Institute | USA | |
| 11 (1135) | RAND Corporation | USA | |
| 12 (1276) | Marine Biological Laboratory | USA | |
| 13 (1746) | Wildlife Conservation Society USA | USA | |
| 14 (1973) | Monterey Bay Aquarium Research Institute | USA | |
| 15 (2148) | Desert Research Institute, Reno | USA | |
| 16 (2369) | Battelle Memorial Institute | USA | |
| 17 (2397) | International Monetary Fund | USA | |
| 18 (2404) | Universities Space Research Association | USA | |
| 19 (2408) | Louisiana State University Agricultural Center | USA | |
| 20 (2585) | Southwest Research Institute | USA | |
| 21 (3434) | Electric Power Research Institute | USA | |
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