| Boozie Barbers Ltd | Luton | 2023 |
| Boo’S Aesthetics Ltd | Dundee | 2020 |
| Boo’S Beds Ltd | Laurencekirk | 2025 |
| BOP Maintenance Ltd | Aberdeen | 2023 |
| BOQ Limited | Maidstone | 2004 |
| Boqu Ltd | Barnsley, South Yorkshire | 2024 |
| BOR Hull Limited | Abingdon | 2023 |
| Bora Aksu (UK) Limited | London | 2014 |
| Borac Ltd | Devon | 2023 |
| Borade Associates UK Ltd | Harrow | 2020 |
| Boradzhievi Ltd | London | 2013 |
| Borajans Ltd | London | 2018 |
| Boran Ltd | Neath | 2019 |
| Boran Properties Ltd | Harlow | 2017 |
| Borari Ltd | Telford | 2020 |
| Borayla Ltd | Burgess Hill | 2023 |
| Borbat Limited | London | 2018 |
| Borboston Limited | Dovercourt | 2017 |
| Borciani London Ltd | Harrow | 2020 |
| Bordars Limited | London | 2023 |
| Borde Hill Energy Limited | Haywards Heath | 2015 |
| Bordeaux Chase Company Ltd | London | 2024 |
| Bordeaux Investment Limited | London | 2018 |
| Border Caravan Repairs Limited | Berwick Upon Tweed | 2020 |
| Border Caravans Holdings Limited | Dumfries | 2023 |
| Border Care Ltd | Kington | 2016 |
| Border Collie & Working Sheepdog Fitting Database UK CIC | Norwich | 2025 |
| Border Counties Vintage Club Limited | Abergavenny | 1998 |
| Border Domestics Ltd | Galashiels | 2023 |
| Border Groundcare Limited | Barnoldswick | 2006 |
| Border Laundry Service Ltd | Tweedbank | 2018 |
| Border Storage Limited | Carlisle | 1995 |
| Borderless Trade Group Limited | Redditch | 2022 |
| Borderline Tattoo Collective Ltd | Berwick-Upon-Tweed | 2015 |
| Borders Aesthetics Ltd | Hawick | 2021 |
| Borders Bar Limited | Mexborough | 2022 |
| Borders Beauty Studio Ltd | Galashiels | 2020 |
| Borders Body & Mind Ltd. | Lauder | 2004 |
| Borders Homecare Ltd | Glasgow | 2024 |
| Borders K9 Support Limited | Lytham St. Annes | 2014 |
| Borders Mucky Paws Dog Walking Ltd | Peebles | 2024 |
| Borders Pet Crematorium Limited | Melrose | 2018 |
| Borders Public Address Systems Ltd | Gretna | 2026 |
| Borders Wheels | Galashiels | 2006 |
| Borderton Limited | Woldingham | 1966 |
| Bordesley Green Homes Ltd | Solihull | 2012 |
| Bordlan Holdings Limited | Lincoln | 2024 |
| Bordon Soapbox Ltd | Bordon | 2024 |
| Bordonbarbers Ltd | Aldershot | 2010 |
| Borealis Club Ltd | Salisbury | 2023 |
| Bored of Lunch Ltd | Cookstown | 2021 |
| Boredofchores.Com Ltd | Bromley | 2007 |
| Boreham Conservation Society | Chelmsford | 2001 |
| Borg & Overstrom Limited | Norwich | 2026 |
| Borg International Limited | London | 1993 |
| Borges Services Ltd | Cardiff | 2020 |
| Boringdon Park Archway Limited | Sidmouth | 2014 |
| Boringdon Park Limited | Sidmouth | 1998 |
| Boris & Co Barbers Ltd | Huddersfield | 2017 |
| Borispro Limited | Sunbury-On-Thames | 2022 |
| Borja Jewellers Limited | Cardiff | 2019 |
| Bork Comms Limited | Twickenham | 2022 |
| Borl Limited | Poole | 2024 |
| Borley Strategic Holdings Limited | London | 2015 |
| Bormeo Ltd | Telford | 2022 |
| Born 4 Purpose Ministries (Kick UK) Community Interest Company | Rochester | 2020 |
| Born Again Christ Healing Church International | London | 2002 |
| Born Beautiful Beauty Ltd | Earlswood | 2024 |
| Born Beautiful Ltd | Birmingham | 2022 |
| Born From Necessity Limited | East Molesey | 2018 |
| Born to BE Wild Events Ltd | Lydney | 2026 |
| Born to Bronze Ltd | Sutton | 2025 |
| Born to Flow Ltd | Stockport | 2025 |
| Born Urban Barbers 2 Limited | Buckingham | 2018 |
| Born Urban Barbers Limited | Buckingham | 2016 |
| Borna Aesthetic & Laser Centre Ltd | London | 2021 |
| Borne Promotions Limited | Cardiff | 2017 |
| Bornfree Ltd | Abergavenny | 2018 |
| Boro Barber Limited | Middlesbrough | 2023 |
| Boro Mobiles Ltd | Middlesbrough | 2020 |
| Boro Nails Spa Ltd | Middlesbrough | 2026 |
| Borough Beauty Studio Limited | Wells | 2002 |
| Borough Cabs Limited | Widnes | 2018 |
| Borough Energy Limited | Gateshead | 2018 |
| Borough Laundry Services Ltd | Middlesbrough | 2019 |
| Borough of Aesthetics Ltd | London | 2026 |
| Borough SE1 Ltd | London | 2016 |
| Borough Trustee NO1 Limited | Edinburgh | 2013 |
| Borough Trustee NO2 Limited | Edinburgh | 2013 |
| Borough Trustee NO3 Limited | Edinburgh | 2014 |
| Borough Trustee NO4 Limited | Edinburgh | 2015 |
| Boroughbridge Marina Limited | Doncaster | 2006 |
| Borras DRY Cleaners & Laundrette Limited | Llandudno | 2015 |
| Borras DRY Cleaners Limited | Wrexham | 2025 |
| Borras Laundry and Linen Hire Limited | Wrexham | 2023 |
| Borrasca Experience Limited | Emsworth | 2018 |
| Borrest Ltd | Coventry | 2025 |
| Borromean Ltd | Harrow | 2013 |
| Borrow My Field Ltd | Aylesbury | 2019 |
| Borrowmydoggy Limited | London | 2012 |