Forbes Top 50 Givers (2013)
Ranking of the 50 biggest givers is based solely on money given out, not pledged, in calendar year 2013. Published by Forbes 10/2/2014.
People on this list have the most positions in the following organizations.

Companies

1-5 of 126 :: see all
Company People
Microsoft Corporation Bill Gates, Paul G Allen, Melinda French Gates
Berkshire Hathaway Inc. Bill Gates, Warren Buffett
American International Group, Inc. Eli Broad, John A Paulson
eBay Inc. Pierre M Omidyar, Jeffrey Skoll
Graham Holdings Company Melinda French Gates, Warren Buffett

Government Bodies

1-5 of 9 :: see all
Govt Body People
Library of Congress David Koch, David Rubenstein
Smithsonian Institution David Rubenstein
National Gallery of Art David Rubenstein
Office of the Mayor of New York City Michael Bloomberg
U.S. Senate Judiciary Committee’s Subcommittee on Constitutional Amendments David Rubenstein

Other Organizations

1-5 of 255 :: see all
Org People
Clinton Global Initiative Bill Gates, Warren Buffett, Michael Bloomberg, George Soros
Augusta National Golf Club Bill Gates, Charles B Johnson, Warren Buffett, Stephen Bechtel Jr
Rockefeller University David Koch, James H. Simons, Robert Muse Bass, Julian Robertson Jr
Partnership for a New American Economy Pierre M Omidyar, Leonard A Lauder, Michael Bloomberg, Mark Zuckerberg
California Institute of Technology Gordon Earle Moore, Eli Broad, Stephen Bechtel Jr