Sumner M Redstone Charitable Foundation

The W Bradford Ingalls

West Palm Beach, FL

The W Bradford Ingalls supports organizations working in areas such as ocean conservation, housing, healthcare, and arts and culture. Its 2024 grants ranged from $500 to $100,000, with a median of $5,500; most funding went to Florida, followed by Massachusetts. It does not restrict giving to preselected organizations, but the profile does not state whether it accepts unsolicited requests.

The Slater Foundation Inc

Boynton Beach, FL

The Slater Foundation supports a broad range of charitable organizations, including education, health care, military-family support, cultural, community, and environmental organizations. Its 2024 grants ranged from $500 to $250,000, with a median of $22,500, and went mainly to organizations in Massachusetts, Texas, and Washington, D.C. It funds only preselected organizations and does not accept unsolicited requests.

Everett & Marion Mitchell Foundation

Boston, MA

The foundation supports scholarships for Middleton, Massachusetts, residents based on citizenship, academic achievement, and financial need, as well as churches and colleges and universities. Its 2025 grants ranged from $2,003 to $309,290, with a median of $10,000; most grant dollars went to Massachusetts. Scholarship applications are accepted by mail, but the profile does not state whether it accepts unsolicited requests for other grants.

The Sudbury Foundation

Sudbury, MA

The Sudbury Foundation funds community life, youth and family services, local food and farming, essential needs, and equity and inclusion in Sudbury and surrounding Massachusetts communities. Its 2024 grants ranged from $1,083 to $100,000, with a median of $6,000; applications are open for some programs, while Community grants are by invitation only.

Webster Family Foundation (FKA

Palm Beach Gardens, FL

In 2024, the Webster Family Foundation supported arts and culture, education, and youth programs, with grants ranging from $2,000 to $125,000 and a median of $10,000. Giving was concentrated in Massachusetts, Nebraska, and Florida, with smaller grants in Virginia and New York. It does not accept unsolicited requests and gives only to preselected organizations.

International AIDS Vaccine Initiative Inc

New York, NY

IAVI funds research and development on vaccines and antibodies for HIV, tuberculosis, and emerging infectious diseases, with work in Africa, India, Europe, and the United States, including low-income countries. In 2025 it made eight grants totaling $6.17 million, ranging from about $39,000 to $2.46 million, with a median award of about $544,000. The available information does not state whether it accepts unsolicited requests.

Grace E B Prince Charitable Trus

Dallas, TX

Russell Sage Foundation

New York, NY

The Russell Sage Foundation funds U.S.-focused social science research on issues including work, race and immigration, decision-making, and inequality, primarily through grants to researchers and institutions. Recent grants had a median of $37,500, while program awards can reach $200,000; it supports work focused on the United States. It accepts applications through program-specific online processes, with eligibility and deadlines varying by grant.

The Nancy Lurie Marks Family Foundation

Wellesley, MA

The Nancy Lurie Marks Family Foundation funds autism-related research, clinical care, advocacy, education, policy, and community programs, with community and recreation grants focused on Greater Boston; it has supported organizations in the United States and internationally. In 2025, grants had a median of $40,000, though awards ranged widely from $50 to $2,437,500. It does not accept unsolicited requests; inquiries and applications are by invitation only.

Redstone Family Foundation

Chestnut Hill, MA

The Redstone Family Foundation funds a range of work, including Jewish community life and human rights, education, children’s programs, civic engagement, organ donation, and violence prevention. Its 2024 grants ranged from $1,800 to $350,000, with a median of $22,500, and most funding went to organizations in New York and California. The foundation says it does not limit giving to preselected organizations; no application form or deadline is listed.