| Bobby’S Ossett Ltd | Hospitality | 2022 |
| Bobek Ltd | Information & communication | 2006 |
| Bobo Investment Limited | Real estate | 2018 |
| Bobo's Bubbles Limited | Real estate | 2022 |
| Bobosercombe Ltd | Real estate | 2018 |
| Boci Holdings Ltd | Financial services | 2026 |
| Bodenham Medical Services Limited | Health & social care | 2011 |
| Bodrum (Developments) Ltd | Real estate | 2006 |
| Body @ Trueyou Ltd | Other services | 2017 |
| Body Electric Ltd. | Information & communication | 1998 |
| Body of Works Solutions Ltd | Information & communication | 2026 |
| Body Performance Ltd | Wholesale & retail | 2022 |
| Body Revolution Academy Limited | Education | 2026 |
| Body Revolution Aesthetics Ltd | Other services | 2024 |
| Body, Mind & Heart Limited | Other services | 2018 |
| Bodyform Physiotherapy Ltd | Health & social care | 2024 |
| Bodyskill Limited | Arts & recreation | 2005 |
| Bodyupwomen Limited | Arts & recreation | 2021 |
| Bodyweb Ltd | Information & communication | 2025 |
| Bodywork by SEVENTY3 Ltd | Health & social care | 2025 |
| Bodyworks | Health & social care | 2008 |
| BOE Roofing Ltd | Construction | 2020 |
| Boffin Projects Limited | Administrative & support | 2005 |
| Bogal Services Ltd | Transport & logistics | 2018 |
| Bohlen & Dohlen BAU UND Service GmbH | | 2004 |
| Boho Backdrops Ltd | Other services | 2024 |
| Boho Chic (Harrogate) Limited | Wholesale & retail | 2009 |
| Bohorun & Co Ltd | Professional & scientific | 2002 |
| Bohoruns Business Solutions Limited | Administrative & support | 2004 |
| Boiler & Heating Supplies Limited | Construction | 1994 |
| Boiler Flow Ltd | Construction | 2026 |
| Boilerswaps Ltd | Construction | 2026 |
| Bokeh Property Staging Ltd | Professional & scientific | 2026 |
| Bokor (UK) Properties Limited | Real estate | 2019 |
| Bola 247 Limited | Health & social care | 2018 |
| Boland Fletcher Holdings Ltd | Real estate | 2024 |
| Bold Identities Ltd | Information & communication | 2015 |
| Bold Legal Limited | Professional & scientific | 2016 |
| Bold Pictures Ltd | Information & communication | 2024 |
| Bold Star Ltd | Administrative & support | 2025 |
| Bolder Solutions Limited | Education | 2005 |
| Bolek I Lolek Ltd | Wholesale & retail | 2022 |
| Boler Limited | Hospitality | 2024 |
| Bolsover Infrastructure Investments LP | | 2017 |
| Bolst Global Limited | Wholesale & retail | 2016 |
| Bolt Digital Holdings Ltd | Information & communication | 2025 |
| Bolton Consulting Limited | Professional & scientific | 1995 |
| Bolton of New Farnley Ltd | Wholesale & retail | 2003 |
| Bolton Whitby Limited | Administrative & support | 2025 |
| Boltsoft Ltd | Information & communication | 2013 |
| BOM Engineering Ltd | Manufacturing | 2000 |
| BOM Limited | Information & communication | 2022 |
| Boma Properties Ltd | Real estate | 2024 |
| Bombala Limited | Professional & scientific | 2016 |
| Bombardier Property Maintenance Ltd | Administrative & support | 2020 |
| Bombay Blush Ltd | Hospitality | 2025 |
| Bombay Junction Tikaway Ltd | Hospitality | 2024 |
| Bombay Medics Limited | Health & social care | 2018 |
| Bombay to GOA Limited | Hospitality | 2023 |
| Bombini Tribe Ltd | Wholesale & retail | 2024 |
| Bomo Fashion Limited | Wholesale & retail | 2024 |
| Bomo Group Ltd | Financial services | 2024 |
| BON Appetit Cafe Bistro Ltd | Hospitality | 2020 |
| BON Associates Ltd | Administrative & support | 2016 |
| BON Bons Clothing Ltd | Wholesale & retail | 2020 |
| Bonbon Nails & Beauty Ltd | Other services | 2022 |
| Bond Developments (Leeds) Limited | Construction | 2015 |
| BOND.008 Executive Travel Ltd | Administrative & support | 2018 |
| Bondbridge Consulting Limited | Information & communication | 2017 |
| Bonded Investment Group Ltd | Administrative & support | 2021 |
| Bonded Trading Ltd | Wholesale & retail | 2024 |
| Bondgate Developments Yorkshire Ltd | Construction | 2025 |
| Bondinsure Limited | Financial services | 2023 |
| Bondmor Building Services Ltd | Construction | 2015 |
| Bondsure Limited | Financial services | 2023 |
| Bondwell Ltd | Real estate | 2006 |
| Bone.Beauty Ltd | Wholesale & retail | 2024 |
| Bongs Lechon Ltd | Hospitality | 2026 |
| Bonita Beauty Ltd | Other services | 2012 |
| Bonita Biaan Limited | Wholesale & retail | 2016 |
| Bonitaz Serenity Spa Ltd | Other services | 2026 |
| Bonitek Ltd | Administrative & support | 2014 |
| Bonlow Limited | | 1984 |
| Bonmea Ltd | Wholesale & retail | 2020 |
| Bonne Chance Ltd | Administrative & support | 2022 |
| Bonner & Hindley Marketing & Public Relations Limited | Professional & scientific | 2000 |
| Bonneville Consultancy Services Limited | Construction | 2017 |
| Bonnew Limited | Hospitality | 2002 |
| Bonnie & Clyde Yorkshire Ltd | Hospitality | 2023 |
| Bonnie Buns Ltd | Manufacturing | 2019 |
| Bonnie Smiles Global Limited | Wholesale & retail | 2022 |
| Bonsai Skin Clinic Ltd | Health & social care | 2021 |
| Bonsi Project Services Limited | Professional & scientific | 2025 |
| Bonza Print LLP | | 2007 |
| Bonzai Umbrella Limited | Administrative & support | 2022 |
| BOO! Marketing Limited | Professional & scientific | 2024 |
| Bood Branding Limited | Professional & scientific | 2024 |
| Boog Investments Limited | Real estate | 2025 |
| Book a Cleaner Ltd | Water & waste | 2021 |
| Book Keeping Services 2004 Limited | Professional & scientific | 2004 |