| BrewDog PLC |
| Bright Scholar Education Holdings Limited |
| Brighter Sound Ltd |
| Bristol Energy |
| Bristol University Press |
| Britbo Holding AG |
| British Airways |
| British Columbia Investment Management Corporation (BCI) |
| British Film Institute (BFI) |
| British Gas |
| British Institute of Archaeology at Ankara |
| British International Schools in Kurdistan |
| British Languages Centre (BLC) |
| British Textile Biennial |
| British Youth Council |
| Britvic Plc |
| Brodie, Melrose, Drysdale and co Limited |
| Brompton Bicycles Ltd |
| Brother Industries Ltd |
| Brothers We Stand |
| BSH Hausgeräte GmbH |
| Bspoke Underwriting Ltd. (previously UK General Insurance Ltd) |
| BT Group Plc |
| BTC Group Holdings UK Limited |
| BTL Group Ltd. |