Funders
- Borealis Philanthropy
- Boston Green Ribbon Commission
- Boston Public Schools
- Bowles Family Company
- Bowman C. Lingle Trust
- Boys and Girls Clubs of America
- BP Foundation
- Brain Tumour Research
- Brain Tumour Support
- Brainerd Foundation
- Brainstrust
- Brazilian Philanthropy Network for Social Justice (Rede de Filantropia Para a Justica Social)
- Breneman Jaech Foundation
- Brennan Center for Justice at New York University School of Law
- Brindle Foundation
- Bristol-Myers Squibb Foundation
- British American Tobacco, South Africa
- British Red Cross
- Broad Art Foundation
- Broad Center for the Management of School Systems