Warren Buffett Individual Male Nebraska 12 $41.13 Billion Bill & Melinda Gates Foundation Foundations Washington 2,925 $24.98 Billion Bill and Melinda Gates Couple Washington 4 $10.35 Billion Bill & Melinda Gates Foundation Trust Foundations Washington 1,166 $7.25 Billion Lilly Endowment Inc Foundations Indiana 1,232 $6.28 Billion William Hewlett Individual Male California 1 $6.00 Billion Gordon E and Betty I Moore Couple California 2 $5.00 Billion James L Sorenson Individual Male Utah 4 $4.52 Billion Walton Family Foundation Foundations Arkansas 346 $4.26 Billion Leona Helmsley Individual Female New York 2 $4.01 Billion Gordon and Betty Moore Foundation Foundations California 564 $3.34 Billion Ford Foundation Foundations New York 874 $2.67 Billion William and Flora Hewlett Foundation Foundations California 692 $2.64 Billion David and Lucile Packard Foundation Foundations California 485 $2.52 Billion Susan Buffett Individual Female Nebraska 1 $2.40 Billion Annenberg Foundation Foundations California 583 $2.31 Billion Starr Foundation Foundations New York 476 $2.19 Billion Joan B Kroc Individual Female California 14 $1.97 Billion Robert Wood Johnson Foundation Foundations New Jersey 687 $1.90 Billion PACE Other Groups Indiana 10 $1.75 Billion