| Simons Foundation | 88 | $19.9m |
| WASHINGTON RESEARCH FOUNDATION | 223 | $15.1m |
| Bill & Melinda Gates Foundation | 9 | $13.4m |
| American Heart Association Inc | 5 | $10.6m |
| Wellcome Trust | 7 | $8.6m |
| CHAN ZUCKERBERG INITIATIVE FOUNDATION | 1 | $5.0m |
| WAYNE D KUNI AND JOAN E KUNI FOUNDATION | 2 | $4.6m |
| David and Lucile Packard Foundation | 16 | $4.3m |
| THE ALLEN INSTITUTE FOR ARTIFICIAL INTELLIGENCE | 2 | $3.9m |
| W.M. Keck Foundation | 3 | $3.6m |
| Andrew W Mellon Foundation | 11 | $3.6m |
| Gordon and Betty Moore Foundation | 17 | $3.2m |
| Arnold Ventures (Laura and John Arnold Foundation) | 9 | $3.2m |
| Alfred P. Sloan Foundation | 19 | $3.1m |
| Doris Duke Foundation | 12 | $2.9m |
| Pew Charitable Trusts | 11 | $2.5m |
| William and Flora Hewlett Foundation | 7 | $2.3m |
| M.J. Murdock Charitable Trust | 10 | $2.2m |
| Silicon Valley Community Foundation | 3 | $2.0m |
| PETER G PETERSON FOUNDATION | 2 | $1.4m |
| THE SCHMIDT FAMILY FOUNDATION | 2 | $1.4m |
| California Healthcare Foundation | 3 | $1.3m |
| THE JOHN A HARTFORD FOUNDATION INC | 2 | $1.3m |
| Howard Hughes Medical Institute | 1 | $1.2m |
| Annie E. Casey Foundation | 3 | $996.1k |
| WILLIAM T GRANT FOUNDATION INC | 6 | $951.4k |
| J. Paul Getty Trust | 11 | $951.4k |
| Henry Luce Foundation | 4 | $924.6k |
| Leona M & Harry B Helmsley Charitable Trust | 11 | $918.4k |
| Susan Thompson Buffett Foundation | 6 | $860.4k |
| ARCHSTONE FOUNDATION | 6 | $846.4k |
| Bloomberg Family Foundation Inc | 1 | $835.0k |
| CA-CRA-895097756RR0001 | 3 | $796.6k |
| John D and Catherine T MacArthur Foundation | 3 | $750.0k |
| STEVEN & ALEXANDRA COHEN FOUNDATION INC | 3 | $694.3k |
| WILBURFORCE FOUNDATION C/O LISA WEINSTEIN | 6 | $575.0k |
| EDWARD P EVANS FOUNDATION | 2 | $550.0k |
| JAMES S MCDONNELL FOUNDATION | 1 | $538.6k |
| Good Ventures Foundation | 3 | $531.5k |
| SCHWAB CHARITABLE FUND | 2 | $511.3k |
| GRANTHAM FOUNDATION FOR THE PROTECTION OF THE ENVIRONMENT | 1 | $500.0k |
| The Spencer Foundation | 6 | $473.5k |
| Arthritis National Research Foundation | 3 | $412.3k |
| COLLEGE SPARK WASHINGTON | 5 | $405.0k |
| WARREN ALPERT FOUNDATION | 2 | $400.0k |
| JOSIAH MACY JR FOUNDATION | 3 | $399.1k |
| The Kresge Foundation | 1 | $385.0k |
| Carnegie Corporation of New York | 1 | $350.0k |
| TIDES FOUNDATION | 1 | $320.0k |
| The Childrens Hospital Of Philadelphia | 2 | $315.8k |