Funders
- Best Buy Children's Foundation
- Bezos Family Foundation
- BHP Foundation
- bi3
- Bikuben Fonden
- Bilgi University Human Rights Research Center
- Bill & Melinda Gates Foundation
- Bill Graham Foundation
- Birmingham Foundation
- Birth to Five Policy Alliance
- Black Girls Vote
- Black Male Donor Collaborative
- Blandin Foundation
- Bloomberg
- Bloomberg American Health Initiative of the Johns Hopkins Bloomberg School of Public Health
- Bloomberg Associates
- Bloomberg Philanthropies
- Blue Cross and Blue Shield of Louisiana
- Blue Cross and Blue Shield of Minnesota Center for Prevention
- Blue Cross and Blue Shield of Minnesota Foundation
- Blue Cross and Blue Shield of North Carolina Foundation
- Blue Cross Blue Shield Center for Prevention
- Blue Cross Blue Shield of Massachusetts Foundation
- Blue Moon Fund, Inc.
- Blue Shield of California Foundation
- Bluefrog Fundraising
- Bodman Foundation
- Bohemian Foundation
- Bon Secours Virginia Health System
- Booth Ferris Foundation