International Rice Research Institute

The William & Flora Hewlett Foundation

Menlo Park, CA

The William & Flora Hewlett Foundation funds education, climate and conservation, the arts, democracy, gender equity, racial justice, and efforts to strengthen nonprofits and philanthropy, with work spanning the San Francisco Bay Area, the U.S. West, and locations including East and West Africa and Mexico. Its 2024 grants had a median award of $150,000, though amounts varied widely. It generally does not accept unsolicited requests, but sometimes invites proposals through open processes.

The Rockefeller Foundation

New York, NY

The Rockefeller Foundation funds initiatives in energy access, sustainable food systems, health, climate, economic opportunity, and finance in the United States and around the world. In 2024, it made 381 grants, with a median grant of about $171,000, though awards ranged widely; it does not accept unsolicited requests and funds preselected organizations only.

John D and Catherine T Macarthur Foundation

Chicago, IL

The MacArthur Foundation funds work advancing a more just, verdant, and peaceful world, including climate solutions, criminal justice, journalism, technology, and Chicago. In 2024, its grants had a median of $160,000, though awards ranged widely; it generally does not accept unsolicited requests, with possible exceptions for specific open calls or proposals that meet program guidelines.

Gates Foundation

Seattle, WA

The Gates Foundation funds work to reduce disease and poverty, improve health and gender equality in lower-income countries, and support education and economic mobility in the United States, especially Washington State; it works in more than 140 countries. Its 2024 grants had a median of $500,000, with awards ranging from $1 to $350.5 million. It generally does not accept unsolicited proposals, but periodically offers opportunities through published requests for proposals.

Freedom Together Foundation

New York, NY

The foundation funds work to strengthen multiracial democracy and build community and worker power, racial and gender justice, movement infrastructure, reproductive health, medical research, and community institutions. In 2024, its grants ranged from $5,000 to $14 million, with a median of $500,000; its largest shares went to organizations in Washington, DC, New York, California, Massachusetts, and Illinois. It funds only preselected organizations and does not accept unsolicited requests.

Tikkun Olam Foundation Inc

New York, NY

Tikkun Olam Foundation supports women’s health, gender justice, and reproductive rights, including social justice and community organizing; its 2024 grants ranged from $2,500 to $1 million, with a median of $60,000. Grants went mainly to organizations in New York, California, Massachusetts, Washington, DC, and Minnesota. It does not accept unsolicited requests and funds only preselected charitable organizations.

Rockefeller Brothers Fund Inc

New York, NY

The Rockefeller Brothers Fund supports work on democracy, sustainable development and climate, and peacebuilding, as well as place-based efforts in China, Central America, and the Western Balkans and arts and culture in New York City. Its 2024 grants had a median of $60,000, though awards varied widely. It accepts unsolicited requests, but rarely funds them—fewer than 1 percent result in funding.

Acumen Fund Inc

New York, NY

The Pierre & Tana Matisse Foundation Inc

New York, NY

The foundation funds arts and arts education, particularly programs serving children and youth in underserved schools and communities, with a focus on New York City; it also supports public cultural programming and art-related research. Its 2024 grants ranged from $1,500 to $1 million, with a median of $35,000. The profile lists a letter as application material but does not state whether unsolicited requests are accepted.