Arcus Foundation is a New York City-based private grantmaking foundation founded in 2000 that deploys philanthropic capital for LGBTQ human rights, protection of marginalized communities, and conservation of great apes and gibbons. Its impact-focused grantmaking spans global work, including Africa, the Americas, and the United Kingdom, and is most relevant to mission-driven nonprofits and initiatives aligned with social justice, inclusion, sustainability, and environmental conservation.