32 Top U.S. Think-Tanks, starting with a B :
- B Team
- B612 Foundation
- Badger Institute
- Baker Institute (Rice University)
- Banking on Climate Chaos
- Basel Action Network
- Bay Area Council Economic Institute
- Beacon Center of Tennessee
- Belfer Center (Harvard University)
- Berggruen Institute
- Berkeley Earth
- Berkeley Roundtable on the International Economy
- Bertelsmann Foundation
- Big Data China
- Biodiversity Policy [USAID]
- Bipartisan Policy Center
- BlackRock Investment Institute
- Bloomberg Philanthropies
- BluePath Labs
- Booz Allen
- Boston Consulting Group
- Boston University Global Development Policy Center
- Breakthrough Energy
- Breakthrough Institute
- Brennan Center for Justice (NYU)
- Bridging Divides Initiative
- Brookings
- Buckeye Institute
- Bush Presidential Center
- Bush School of Government and Public Service
- Business for Social Responsibility
- Business Roundtable