| Richard King Mellon Foundation | 19 | $39.2m |
| DIETRICH FOUNDATION | 2 | $21.0m |
| GREATER HOUSTON COMMUNITY FOUNDATION | 1 | $14.4m |
| Bill & Melinda Gates Foundation | 16 | $12.5m |
| Pittsburgh Foundation | 3 | $10.8m |
| American Heart Association Inc | 3 | $7.5m |
| Heinz Endowments | 39 | $5.8m |
| HILLMAN FAMILY FOUNDATIONS | 21 | $5.4m |
| John Templeton Foundation | 6 | $3.4m |
| Leona M & Harry B Helmsley Charitable Trust | 5 | $2.8m |
| The Childrens Hospital Of Philadelphia | 5 | $2.5m |
| SHEAR FAMILY FOUNDATION INC | 2 | $2.2m |
| Charles Koch Foundation | 2 | $2.2m |
| VANGUARD CHARITABLE ENDOWMENT PROGRAM | 2 | $1.7m |
| Simons Foundation | 13 | $1.1m |
| MCCUNE FOUNDATION PNC BANK NA | 1 | $1.1m |
| Gordon and Betty Moore Foundation | 5 | $1.0m |
| MCELHATTAN FOUNDATION | 2 | $1.0m |
| NATIONAL PHILANTHROPIC TRUST | 2 | $927.0k |
| SCHWAB CHARITABLE FUND | 2 | $817.3k |
| Arnold Ventures (Laura and John Arnold Foundation) | 6 | $757.2k |
| Lumina Foundation | 1 | $698.5k |
| JAMES S MCDONNELL FOUNDATION | 2 | $679.0k |
| WILLIAM T GRANT FOUNDATION INC | 4 | $653.4k |
| Silicon Valley Community Foundation | 3 | $587.2k |
| THE DALLAS FOUNDATION | 2 | $584.6k |
| THE FREEMAN FOUNDATION | 1 | $556.2k |
| THE TEPPER FOUNDATION | 2 | $400.0k |
| J. Paul Getty Trust | 2 | $373.0k |
| Carnegie Corporation of New York | 1 | $366.4k |
| William Penn Foundation | 3 | $342.6k |
| Wallace Foundation | 1 | $304.3k |
| CLAUDE WORTHINGTON BENEDUM FOUNDATION | 4 | $300.0k |
| The Spencer Foundation | 5 | $297.9k |
| KENNETH RAININ FOUNDATION | 2 | $275.0k |
| Cleveland Foundation | 3 | $273.4k |
| David and Lucile Packard Foundation | 2 | $262.5k |
| GS DONOR ADVISED PHILANTHROPY FUND FOR WEALTH MANAGEMENT INC | 1 | $257.5k |
| Kauffman Foundation | 2 | $250.0k |
| Wellcome Trust | 2 | $229.9k |
| Doris Duke Foundation | 2 | $214.5k |
| AMATEUR RADIO DIGITAL COMMUNICATIONS | 1 | $212.0k |
| DSF CHARITABLE FOUNDATION | 1 | $200.0k |
| SONTAG FOUNDATION | 2 | $187.5k |
| EDWARD P EVANS FOUNDATION | 1 | $150.0k |
| ARNOLD AND MABEL BECKMAN FOUNDATION | 1 | $150.0k |
| THE GOLDMAN SACHS CHARITABLE GIFT FUND | 1 | $150.0k |
| Alfred P. Sloan Foundation | 3 | $142.8k |
| The Commonwealth Fund | 1 | $115.5k |
| THE RALPH C WILSON JR FOUNDATION | 1 | $108.0k |