The Carter Center and the George W. Bush Presidential Foundation (related to the George W. Bush Policy Institute) made the 2012 Top 100 Nonprofits list, a survey conducted by The NonProfit Times (NPT).
The Carter Center was #84 on the list, with $202,858,134 in revenue. The George W. Bush Presidential Foundation was #99 on the list with $161,017,490 in revenue.
The Pew Charitable Trusts also made the list (#49) with $300,131,637. They fund the Pew Research Center, which is often called a think tank.
The William J. Clinton Foundation also made the list, although that organization is typically not considered a think tank.
