One Small Planet

One Small Planet is a Boulder, Colorado-based impact investment firm founded in 2020 by Will Peterffy. Structured around the four elements, it operates three integrated pillars: the Fire Fund (venture), Water (philanthropy), and Earth (land stewardship). The Fire Fund invests primarily at Seed and Series A stages in companies focused on regenerative systems technology, sustainable materials, carbon sequestration and reforestation, and water technology. The firm takes a biocentric approach, weighing impact on living systems before financial return. It is connected to the Peterffy Foundation, established by Thomas Peterffy, and functions in practice as a family office vehicle. Portfolio companies include Cruz Foam, Simplifyber, ReSeed, Dendra Systems, Miraterra, and Regen Network. No public application portal is listed; founders are encouraged to reach out via hello@onesmallplanet.org.