Overview
Catalytic capital—debt, equity, guarantees, and other investments that accept disproportionate risk or concessionary returns compared to a conventional investment in order to generate positive impact—is an essential tool to support impact-driven enterprises and organizations that lack access to capital on suitable terms through the conventional marketplace.
The aim of catalytic capital is to unlock impact and additional investment that would not otherwise be possible. It expands opportunity and economic growth and fuels innovation for the well-being of people and the planet, while allowing mainstream investors to participate in transformative investments.
To make substantial progress toward a more just, inclusive, and sustainable world, we need more catalytic capital to flow. The Catalytic Capital Consortium, or C3, demonstrates the power of this form of investment to expand the reach of the impact investing field, helping to address the $2.5-4 trillion needed annually to reach the United Nations Sustainable Development Goals.
For the C3 initiative, we selected a set of funds and organizations to receive over $128 million in impact investments. Collectively, this portfolio showcases catalytic capital across diverse sectors and geographies. It is designed to reduce risk, build track records, and increase the scale of promising fund managers. These investments set the stage for other investors—both impact-oriented and conventional—to participate and fuel additional growth.
The initiative’s pooled grant funding is supported by MacArthur and other funders. At C3’s launch in 2019, The Rockefeller Foundation and Omidyar Network joined MacArthur to support the initiative’s first three years of grantmaking. In 2025, a group of impact investment leaders—including Blue Haven Initiative, Builders Vision, Ceniarth, and the Ford, Surdna, Sorenson Impact, Lemelson, Small, and Walton Family foundations—added new grant funding to extend the initiative and further promote learning and collaboration, while also growing an energetic and activated community of practice.
Field Partnerships
As part of the C3 initiative, we have made 15 investments totaling over $128 million that demonstrate the use of catalytic capital across diverse sectors and geographies. As collaboration is essential to the successful use of catalytic capital, we use the term “field partnership” to describe the efforts that we support with our investments. The active set of field partnerships includes:

