| Bond Assets Ltd | Administrative & support | 2025 |
| Bond Forging Ltd | Manufacturing | 2025 |
| Bond Homes Limited | Real estate | 1975 |
| Boneshaker Cycle Repairs Ltd | Manufacturing | 2020 |
| Boogie in BGF Ltd | Other services | 2025 |
| Boombox Skate Shop Ltd | Wholesale & retail | 2025 |
| Boon and Worth Limited | Professional & scientific | 2016 |
| Border Contracts Fencing Ltd | Construction | 2004 |
| Border Health Alliance Limited | Health & social care | 2024 |
| Border Office Supplies and Systems Limited | Wholesale & retail | 2003 |
| Border Property Management Limited | Administrative & support | 2022 |
| Border Property Services Ltd | Construction | 2020 |
| Bordercraft Workshops Limited | Manufacturing | 2000 |
| Borders Civils and Plant Hire Ltd | Construction | 2024 |
| Borg Automotive UK Limited | Manufacturing | 2008 |
| Boss Connect Ltd | Information & communication | 2026 |
| Boss Corp Ltd | Extraterritorial | 2018 |
| Bossman Retail Leominster Ltd | Wholesale & retail | 2025 |
| Bossman's Retail Ltd | Wholesale & retail | 2018 |
| Botanical Weddings Limited | Professional & scientific | 2025 |
| Boultbee (Carshalton) Limited | Real estate | 2012 |
| Boultbee Brooks (67-75 Mosley Street) Limited | Construction | 2015 |
| Boultbee Brooks (79 Mosley Street) Limited | Construction | 2015 |
| Boultbee Brooks (Ambrose Street) LLP | | 2018 |
| Boultbee Brooks (Castle Park) Limited | Real estate | 2021 |
| Boultbee Brooks (Cheltenham) Limited | Construction | 2026 |
| Boultbee Brooks (Cosy Retreats) Limited | Hospitality | 2022 |
| Boultbee Brooks (E & L Developments) Limited | Real estate | 2019 |
| Boultbee Brooks (Energy Storage Barton in Fabis) Limited | Energy | 2023 |
| Boultbee Brooks (Energy Storage Borrans Lane) Limited | Energy | 2024 |
| Boultbee Brooks (Energy Storage Ellbridge Lane) Limited | Energy | 2023 |
| Boultbee Brooks (Energy Storage Kibworth Road) Limited | Energy | 2023 |
| Boultbee Brooks (Energy Storage Larks Lane) Limited | Energy | 2024 |
| Boultbee Brooks (Energy Storage Mansfield Road) Limited | Energy | 2023 |
| Boultbee Brooks (Energy Storage Old Park Lane) Limited | Energy | 2023 |
| Boultbee Brooks (Energy Storage Overseas) Limited | Energy | 2024 |
| Boultbee Brooks (Energy Storage Weirs Drove) Limited | Energy | 2024 |
| Boultbee Brooks (Field Barn) Limited | Hospitality | 2023 |
| Boultbee Brooks (George Hudson Street) LLP | | 2017 |
| Boultbee Brooks (Harrogate 2) LLP | | 2015 |
| Boultbee Brooks (Harrogate) LLP | | 2015 |
| Boultbee Brooks (Hill View) Limited | Hospitality | 2019 |
| Boultbee Brooks (Lamb Walk 2) LLP | | 2014 |
| Boultbee Brooks (LBB) Limited | Extraterritorial | 2019 |
| Boultbee Brooks (Long View) Limited | Administrative & support | 2022 |
| Boultbee Brooks (Lower Canwood) Limited | Hospitality | 2025 |
| Boultbee Brooks (New Company) Limited | Real estate | 2019 |
| Boultbee Brooks (Noel Street) Limited | Real estate | 2015 |
| Boultbee Brooks (Orsman) Limited | Construction | 2007 |
| Boultbee Brooks (Park House) LLP | | 2017 |
| Boultbee Brooks (Prospect House 2) LLP | | 2014 |
| Boultbee Brooks (Prospect House) LLP | | 2014 |
| Boultbee Brooks (Renewables Arley) Limited | Energy | 2024 |
| Boultbee Brooks (Renewables County Lane) Ltd | Energy | 2021 |
| Boultbee Brooks (Renewables Finlays Bridge) Limited | Energy | 2023 |
| Boultbee Brooks (Renewables Highgate) Ltd | Energy | 2021 |
| Boultbee Brooks (Renewables Ilgars) Ltd | Energy | 2021 |
| Boultbee Brooks (Renewables Lees New Road) Limited | Energy | 2023 |
| Boultbee Brooks (Renewables Lower Farm) Ltd | Energy | 2021 |
| Boultbee Brooks (Renewables Luton HOO) Ltd | Energy | 2021 |
| Boultbee Brooks (Renewables Monks Wood) Limited | Energy | 2023 |
| Boultbee Brooks (Renewables Rowley Hill) Limited | Energy | 2021 |
| Boultbee Brooks (Renewables Ruddles Lane) Limited | Energy | 2023 |
| Boultbee Brooks (Renewables Tiddie Cross) Limited | Energy | 2023 |
| Boultbee Brooks (Renewables Walkford Moor) Ltd | Energy | 2021 |
| Boultbee Brooks (Sharpnage) Limited | Hospitality | 2004 |
| Boultbee Brooks (Sovereign Street) LLP | | 2015 |
| Boultbee Brooks (Talbot Building) LLP | | 2018 |
| Boultbee Brooks (Thirsk ROW) LLP | | 2018 |
| Boultbee Brooks (Tower Court) LLP | | 2017 |
| Boultbee Brooks (Trimbridge House) Limited | Real estate | 2019 |
| Boultbee Brooks (Victoria ST 2) Limited | Real estate | 2020 |
| Boultbee Brooks (Victoria ST.) Ltd | Construction | 2019 |
| Boultbee Brooks (Victoria Terrace Bristol) Limited | Information & communication | 2026 |
| Boultbee Brooks Capital LLP | | 2014 |
| Boultbee Brooks Energy Storage Limited | Energy | 2021 |
| Boultbee Brooks Limited | Agriculture & fishing | 1999 |
| Boultbee Brooks Real Estate Group Limited | Professional & scientific | 2013 |
| Boultbee Brooks Real Estate Holdings Limited | Professional & scientific | 2013 |
| Boultbee Brooks Real Estate Limited | Real estate | 2002 |
| Boultbee Brooks Renewable Energy Limited | Energy | 2019 |
| Boultbee Construction (Shelf 1) Limited | Extraterritorial | 2015 |
| Boultbee Construction Limited | Real estate | 1987 |
| Boultbee Developments (NO.1) Limited | Financial services | 2011 |
| Boultbee Developments Group Services Ltd | Financial services | 2021 |
| Boultbee Developments Holdings Limited | Financial services | 2020 |
| Boultbee Developments Ltd | Financial services | 2012 |
| Boultbee Estates (NO. 1) Limited | Financial services | 2017 |
| Boultbee Estates Limited | Financial services | 2012 |
| Boultbee Finance (Shelf 1) Limited | Extraterritorial | 2015 |
| Boultbee Finance Holdings Ltd | Financial services | 2020 |
| Boultbee Finance Ltd | Financial services | 2020 |
| Boultbee Lending 1 Limited | Financial services | 2013 |
| Boultbee Lending 2 Limited | Financial services | 2013 |
| Bowen Training UK Ltd | Public administration | 2019 |
| Bowen&Co Ltd | Manufacturing | 2019 |
| Bowerhinton Trading Limited | Transport & logistics | 2003 |
| Bowie Carpentry & Construction Ltd | Construction | 2025 |
| Bowling Green Garage (Powick) Limited | Real estate | 1959 |
| BOX44 Property Holdings Limited | Real estate | 2019 |