| Brite Dental Centre | Health Care |
| Brk Trading & Transport Company | Transport |
| Brown Wood Contracting Co. WLL | Construction |
| Budget Rent a Car-Qatar | Transport |
| Builders Advanced Engineering & Construction | Construction |
| Buildmore-Group | Construction |
| Built In Contracting & Trading W.L.L | Construction |
| Builtech Engineering & Contracting Company | Construction |
| Bullseye Zoujaj L.L.C | Industrial Manufacturing |
| Business Communication Trading & Contracting | Industrial Manufacturing |
| Business Trading Company | Real Estate |
| Business Zone | Conglomerates |
| Buyer Solutions Trading & Contracting Company WLL | Construction |
| Buzwair Group W.L.L | Construction |
| Buzwair Industrial Gases Factories | Industrial Manufacturing |
| Buzwair Marble and Granite | Industrial Manufacturing |
| Bab Ishtar Group Company W.L.L. | Construction |
| Backpacker for Trading & Services | Conglomerates |
| BackPacker IT Solutions Qatar | Conglomerates |
| Badr Contracting & Trading W.L.L | Construction |
| Bait Al-Mashura Finance Consultations | Financial Services |
| Bardawil Specialities Qatar W.L.L. | Industrial Manufacturing |
| Barq Construction Group W.L.L. | Construction |
| Barwa Bank Q.S.C. | Financial Services |
| Barwa Real Estate Company Q.S.C. | Real Estate |
