| 1 (301) | Institute for Advanced Study | USA |  | |
| 2 (345) | Simons Foundation | USA | | |
| 3 (477) | Kavli Institute for Particle Astrophysics and Cosmology | USA | | |
| 4 (680) | Carnegie Institution for Science * | USA | | |
| 5 (979) | Universities Space Research Association | USA | | |
| 6 (1596) | Woods Hole Oceanographic Institution | USA | | |
| 7 (1653) | Santa Fe Institute | USA | | |
| 8 (1777) | SETI Institute | USA | | |
| 9 (1820) | Southwest Research Institute | USA | | |
| 10 (1898) | Planetary Science Institute | USA | | |
| 11 (2172) | Space Science Institute | USA | | |
| 12 (2664) | Lowell Observatory | USA | |
