America's biggest donors of 2012

Published On: Feb 18 2013 02:57:37 PM CST   Updated On: Feb 19 2013 01:00:00 AM CST

The Chronicle of Philanthropy has released its annual list of America's biggest donors of 2012. Take a look at the 15 most generous donors.

Paul Allen
13 / 17
Lucas Jackson/Reuters

4. John Allen. Donations: $309.1 million. Allen is a co-founder of Microsoft. Most of his donations went to the Allen Institute for Brain Science.

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