| Rank | Name |
|---|---|
| 1 | Warren Buffett CEO at Berkshire Hathaway, Investor |
| 2 | Bill & Melinda Gates Foundation Family foundation of Microsoft founder Bill Gates |
| 3 | Bill Gates Founder of Microsoft |
| 3 | Melinda French Gates Co-Chair of the Bill & Melinda Gates Foundation |
| 6 | Lilly Endowment Inc |
| 7 | William R Hewlett Co-founder of the Hewlett-Packard Company |
| 8 | Gordon Earle Moore Co-founder of Intel |
| 8 | Betty Moore |
| 9 | James LeVoy Sorenson founder, Sorenson Companies |
| 10 | Walton Family Foundation Inc Philanthropic foundation affiliated with family that owns Walmart |
| 11 | Leona M Helmsley New York real estate billionaire |
| 12 | Gordon and Betty Moore Foundation |
| 14 | Ford Foundation Major private foundation based in NYC |
| 15 | Hewlett Foundation Private foundation established by Hewlett-Packard cofounder |
| 16 | The David and Lucile Packard Foundation Funded with Proceeds from Hewlett Packard |
| 17 | Susan Buffett Daughter of Warren Buffett; founder of Sherwood Foundation |
| 18 | The Annenberg Foundation |
| 19 | Starr Foundation One of largest private foundations in U.S. |
| 20 | Joan B Kroc Third wife and widow of Ray Kroc |
| 21 | Robert Wood Johnson Foundation |
| 22 | PACE Partners for the Advancement of Collaborative Engineering Education |
| 23 | Robert W Woodruff Foundation Inc |
| 24 | Legal Services Corporation Private, non-profit corporation established by the United States Congress |
| 25 | Glaxosmithkline Patient Access |
| 26 | Donald W Reynolds Foundation |
| 28 | Walter Annenberg II Billionaire publisher, ambassador, and philanthropist died in 2002 |
| 29 | NCAA The National Collegiate Athletic Association is a voluntary organization through which the nation's colleges and universities govern their athletics programs. |
| 30 | Herbert Sandler Former CO-CEO (with his wife, Marion Sandler) of Golden West Financial Corporation and World Savings Bank. |
| 31 | Pew Charitable Trusts |
| 32 | The Broad Foundation |
| 33 | The Kresge Foundation Private foundation headquartered in Troy, Michigan |
| 34 | Barron Hilton Son of hotel magnate Conrad N Hilton |
| 35 | Merck Patient Assistance Program |
| 36 | Feeding America Formerly known as America's Second Harvest - largest domestic hunger-relief charity, with network members supplying food to more than 25 million Americans each year |
| 37 | Howard Hughes Medical Institute |
| 38 | Andrew W Mellon Foundation Major private foundation based in NYC |
| 39 | Virginia Stowers |
| 40 | Bill Daniels Cable television pioneer |
| 41 | The Susan Thompson Buffett Foundation |
| 42 | MacArthur Foundation Major private grant-making foundation; based in Chicago |
| 45 | Peter G Peterson Billionaire Blackstone Group co-founder; former Lehman CEO and CFR chairman |
| Open Society Foundations International grantmaking network founded by business magnate George Soros | |
| Knight Foundation | |
| WK Kellogg Foundation |