Mulago is a private foundation created to carry forward the life’s work of pediatrician Rainer Arnhold. Rainer was driven by a belief that children living in poverty deserve far better lives; Mulago’s mission reflects that focus on solutions that meet the basic needs of the poorest families. After Rainer’s sudden death in 1993, his brother Henry Arnhold re‑shaped the foundation into its current, impact-obsessed form. Mulago backs organizations that can deliver lasting change at scale: it provides flexible, unrestricted funding to teams with scalable solutions and a proven ability to execute. The portfolio spans both start-ups and more mature organizations, and Mulago is deliberately structure-agnostic — nonprofit or for‑profit doesn’t matter, only the path to impact does. With a big mandate and a tiny staff, Mulago does not accept unsolicited proposals; instead, it sources through a deep network to efficiently find the best fits for its very specific criteria. Its fellows programs are designed to help social entrepreneurs design for impact, craft strategies for scale, and join a community committed to measurable, durable outcomes.

The Henry Arnhold Fellowship identifies conservation and climate leaders with solutions that work and can grow fast — then helps them design and deliver those solutions at scale. Each year, Mulago selects 8–10 fellows and supports them to: (1) sharpen high-impact, scalable designs and strategies for bigger, faster, better outcomes; (2) build the organizations capable of executing at scale; and (3) plug into a growing peer community at the forefront of conservation and climate. The fellowship is anchored by two intensive, week‑long workshops that bookend the year, creating rare, focused time to interrogate ideas and apply practical frameworks. Fellows receive an upfront, unrestricted $100,000 grant, year‑long coaching on Mulago’s design/strategy frameworks, and consideration for longer-term Mulago funding. Solutions span protecting nature and ecosystems (forests, rivers, oceans, mountains, grasslands), slowing climate change (cutting emissions, boosting efficiency, capturing carbon), and adapting to a rapidly changing climate — from tropical forests in the Amazon Basin to African grasslands and Indian Ocean fisheries.