John D. and Catherine T. MacArthur Foundation

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John D. and Catherine T. MacArthur Foundation

The John D. and Catherine T. MacArthur Foundation is an American private foundation that makes grants and impact investments to support non-profit organizations in approximately 117 countries around the world. As of 2025, the MacArthur Foundation has an endowment of $9 billion and provides hundreds of millions of dollars annually in grants and impact investments. [Wikipedia ↗]

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