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 133 :: see all
Company People
Microsoft Corporation Bill Gates, Paul G Allen, Melinda French Gates
Salomon Brothers, Inc. Warren Buffett, Michael Bloomberg
Graham Holdings Company Melinda French Gates, Warren Buffett
Enron Corp Richard Kinder, John Arnold
Berkshire Hathaway Inc. Bill Gates, Warren Buffett

Government Bodies

1-5 of 11 :: see all
Govt Body People
Library of Congress David Koch, David Rubenstein
Governor Greg Abbott's "STRIKE FORCE" to Open Texas Michael S Dell, Nancy Kinder
U.S. Senate Judiciary Committee’s Subcommittee on Constitutional Amendments David Rubenstein
Carter Administration David Rubenstein
Empire State Relief Fund James H. Simons

Other Organizations

1-5 of 295 :: see all
Org People
Breakthrough Energy Coalition Bill Gates, Michael Bloomberg, George Soros, Ray Dalio, David Rubenstein, John Arnold, Julian Robertson Jr, Mark Zuckerberg
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
Partnership for a New American Economy Pierre M Omidyar, Leonard A Lauder, Michael Bloomberg, Mark Zuckerberg
Rockefeller University David Koch, James H. Simons, Robert Muse Bass, Julian Robertson Jr