| Border to Coast Surrey LP | | 2019 |
| Border to Coast Teesside GP Limited | Financial services | 2019 |
| Border to Coast Teesside LP | | 2019 |
| Border to Coast Tyne & Wear GP Limited | Financial services | 2019 |
| Border to Coast Tyne & Wear LP | | 2019 |
| Border to Coast Warwickshire GP Limited | Financial services | 2019 |
| Border to Coast Warwickshire LP | | 2019 |
| Border to Coast West Sussex GP Limited | Financial services | 2026 |
| Border to Coast West Sussex LP | | 2026 |
| Border Vets Limited | Extraterritorial | 2009 |
| Borders Competitions Ltd | Wholesale & retail | 2023 |
| Borders Holdings (Scotland) Ltd | Professional & scientific | 2024 |
| Borders LOW Carbon Developments Limited | Construction | 2013 |
| Borders Management Limited | Real estate | 2018 |
| BORDERS25 Limited | Hospitality | 2022 |
| Bordlands Developments Limited | Professional & scientific | 1974 |
| Bore Repair LP | | 2017 |
| Boreal Coinvest Pooling LP | | 2022 |
| Boreal Industrial Opco General Partner Limited | Administrative & support | 2022 |
| Boreal Industrial Opco LP | | 2022 |
| Boreal Master Pooling LP | | 2022 |
| Boreal Pooling GP LLP | | 2022 |
| Boreal Promote Pooling LP | | 2022 |
| Boreland Lodge Limited | Hospitality | 2015 |
| Borem Consult Ltd | Information & communication | 2008 |
| Borettone Management LP | | 2013 |
| Borges Investments Limited | Real estate | 2021 |
| Borgholm NET LP | | 2014 |
| Bornholm Group LP | | 2016 |
| Bornwood Capital LP | | 2012 |
| Borough Communications Services Limited | Financial services | 2021 |
| Borough Heritage Limited | Real estate | 2018 |
| Borough Trustee NO1 Limited | Other services | 2013 |
| Borough Trustee NO2 Limited | Other services | 2013 |
| Borough Trustee NO3 Limited | Other services | 2014 |
| Borough Trustee NO4 Limited | Other services | 2015 |
| Boroughmuir Bears Ltd | Arts & recreation | 2018 |
| Boroughmuir Limited | Arts & recreation | 2012 |
| Boroughmuir Rugby & Community Sports Club | Arts & recreation | 2012 |
| Boroughmuir Rugby Football Club Limited | Arts & recreation | 1996 |
| Boroughmuir Thistle Football Club Ltd | Arts & recreation | 2024 |
| Borrow Corp LP | | 2017 |
| Borrow My Belief Ltd | Education | 2024 |
| Borsao Ltd | Hospitality | 2025 |
| Bort Alliance LP | | 2015 |
| Borthwick & Blackie Joinery Ltd. | Construction | 2010 |
| Borto Steel LP | | 2017 |
| Borubey Limited | Hospitality | 2020 |
| Borviteks Trading LP | | 2014 |
| BOS Mezzanine Partners Fund, L.P. | | 2007 |
| Bosemp Feeder LP | | 2011 |
| Bosfar Alliance LP | | 2017 |
| Bosno LP | | 2015 |
| Boss Donuts Ltd | Hospitality | 2025 |
| Boss Gang Touring Limited | Arts & recreation | 2026 |
| Boss Partnership | | 1999 |
| Boss Scaffolding (Edinburgh) Limited | Other services | 2017 |
| Bosslike Gaming LP | | 2016 |
| Bost International LP | | 2015 |
| Bosta Consulting Ltd | Professional & scientific | 2019 |
| Boston Apparel LP | | 2014 |
| Boston Assets LP | | 2012 |
| Boston Associates L.P. | | 2009 |
| Boston Capital LP | | 2014 |
| Bostreks Trading LP | | 2015 |
| Boswall Dog Grooming Ltd | Other services | 2017 |
| Boswall Mini Market Ltd | Wholesale & retail | 2021 |
| Boswall Po-Newsagents Limited | Wholesale & retail | 2011 |
| Boswell Capital LP | | 2013 |
| Botanica Sound Ltd | Administrative & support | 2025 |
| Botanical Specimens Limited | Wholesale & retail | 2016 |
| Botanical Veterinary Care Ltd | Professional & scientific | 2022 |
| Botanics Energy Company Limited | Administrative & support | 2021 |
| Botaniq Ltd | Administrative & support | 2025 |
| Bother Works Ltd | Information & communication | 2025 |
| Botho Medical Consulting Limited | Health & social care | 2024 |
| Bothwell Care Limited | Health & social care | 2015 |
| Bothy Project | Hospitality | 2017 |
| Botsford Agency LP | | 2014 |
| Botsford Trading LP | | 2012 |
| Bottega Nuova LP | | 2014 |
| Bottega UNO Limited | Professional & scientific | 2021 |
| Bottle Baron Ltd | Wholesale & retail | 2013 |
| Bottle Green Websites Ltd | Information & communication | 2013 |
| Boturich Limited | Real estate | 2020 |
| Bouchard Development LP | | 2016 |
| Boudin Business LP | | 2016 |
| Boudy Ltd | Manufacturing | 2026 |
| Boulangerie 1973 Limited | Hospitality | 2021 |
| Boulder Aggregator SPV, L.P. | | 2024 |
| Boulet Sales LP | | 2017 |
| Boulge Limited | Administrative & support | 2018 |
| Bouliac Investments | | 2005 |
| Bouliac Real Estate South America | | 2005 |
| Bounce GEN Events Ltd | Arts & recreation | 2025 |
| Bounce Sport Ltd | Arts & recreation | 2020 |
| Bounce Sports Management Ltd | Arts & recreation | 2018 |
| Bouncelabs Big Data Ltd | Professional & scientific | 2015 |
| Bouquet Trois Limited | Real estate | 1991 |
| Bourgeon Holdings Limited | Financial services | 2018 |