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MacArthur Foundation
Foundation · Founded 1978 · Chicago, United States
Who MacArthur Foundation is.
- Historical Background
- The John D. and Catherine T. MacArthur Foundation is a private foundation that was established in 1978. It was created by John D. MacArthur, who at the time of his death was one of the three wealthiest individuals in the United States and the sole owner of Bankers Life and Casualty Company of Chicago.
- Source of Capital
- The foundation's capital originates from the estate of John D. and Catherine T. MacArthur. With an endowment of $7.6 billion, the foundation provides approximately $260 million in grants and impact investments annually.
- Allocation Strategy
- The foundation makes grants and impact investments to support non-profit organizations. Its current primary areas of focus include climate change, criminal justice reform, reducing nuclear risk, and combating corruption in Nigeria. The foundation is also known for the MacArthur Fellows Program, which awards unrestricted fellowships to talented U.S. citizens.
The funds MacArthur Foundation backs.
MacArthur Foundation is a limited partner in 246 funds. 30 of them place in the Power Law Investor Ranking; those lead, best-ranked first.



































How MacArthur Foundation’s fund book is spread.
The 246 funds MacArthur Foundation backs, by where the manager is headquartered and how many funds that manager has raised.
Where those managers are based
By fund headquarters, across the 244 of 246 with a location on record.
- North America 18475%
- Europe 3615%
- Rest of world 2410%
United States 179 · United Kingdom 25 · Hong Kong 8 · India 6
How established those managers are
Managers grouped by how many funds they have raised — across the 145 of 246 with a fund history on record.
The companies MacArthur Foundation backs directly.
MacArthur Foundation holds 11 companies directly, separate from the funds it commits to as a limited partner.











Inside MacArthur Foundation’s portfolio.
The 11 highest-funded portfolio companies, of 11 tracked.
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PaOther LPs.
Other foundations in the Power Law LP ranking, closest to MacArthur Foundation by combined power-law score — North America first, then the nearest worldwide.