| Balmores (UK) Ltd | Epsom | 2024 |
| Balms for the Soul Limited | London | 2024 |
| Balmuir Estates Nominees Limited | Cupar | 2000 |
| Balsam Land Ltd | Ilford | 2008 |
| Balsrud Ernaring Limited | London | 2023 |
| Baltherranean Kitchen Ltd | Tunbridge Wells | 2025 |
| Balti Pies Limited | Coventry | 2008 |
| Baltic 56 Management Company Limited | Liverpool | 2017 |
| Baltic Bespoke Modular Buildings Ltd | Liverpool | 2023 |
| Baltic Distribution Limited | Rochford | 2026 |
| Baltic Estates and Management Ltd | Liverpool | 2024 |
| Baltic Management Ltd | Liverpool | 2025 |
| Baltic Properties (North West) Management Company Limited | Liverpool | 2012 |
| Baltic Properties England Management Limited | Liverpool | 2014 |
| Baltic Solutions Limited | Salford | 2020 |
| Baltic Topco Limited | Telford | 2022 |
| Baltic Wharf Investments Limited | London | 2020 |
| Balticsur Corporation S.A. Ltd | London | 2025 |
| Baltimore Court RTM Company Limited | Hove | 2023 |
| Balustrade Glass Limited | Birmingham | 2014 |
| Balux Electric Tools Co., Ltd. | London | 2013 |
| Balwest & Brothers Limited | London | 2018 |
| BAM Land Limited | Northampton | 2014 |
| BAMB1 Limited | Manchester | 2020 |
| Bambara Limited | Bournemouth | 2012 |
| Bambaverse Ltd | Grays | 2025 |
| Bambino (UK) Limited | Teddington | 1987 |
| Bambiola UK Ltd. | London | 2015 |
| Bamboo Capital Limited | Wilmslow | 2016 |
| Bamboo Consulting Limited | London | 2022 |
| Bamboo Crest Advisory Team Ltd | Manchester | 2026 |
| Bamboo Fish Ltd | London | 2020 |
| Bamboo HUT Ltd | London | 2015 |
| Bamboo Rise Ltd | Twickenham | 2023 |
| Bame Recruitment Ltd | London | 2022 |
| Bamford Court (Rasharkin) Management Company Ltd | Portglenone | 2014 |
| Bamford Department Ltd | Preston | 2013 |
| Bamforth and Company,Limited | Leeds | 1910 |
| Bamis Limited | Portsmouth | 2008 |
| Bamora Ltd | Witham | 2024 |
| Bampass Ltd | Gosport | 2025 |
| BAN Nuan Trading Co., Ltd | Stafford, | 2021 |
| Bana & Co Accountants Ltd | Birmingham | 2020 |
| Bana Aram Accountancy Services Ltd | Birmingham | 2020 |
| Banafrut UK Limited | Paddock Wood | 2019 |
| Banahan Rogers Smith Limited | Wolverhampton | 2015 |
| Baname Childcare Services Ltd | Romford | 2024 |
| Banana Dolphin Ltd | Stevenage | 2014 |
| Banana Plant Company Limited | Beaconsfield | 2013 |
| Banana Plant Limited | Beaconsfield | 2013 |
| Banana Split Boutique Limited | London | 2020 |
| Bananas Invest Limited | London | 2012 |
| Bananashark Limited | Kingsbridge | 2003 |
| Banbury Aerials Group Ltd | Banbury | 2009 |
| Banbury Aerials Services Ltd | Banbury | 2009 |
| Banbury Bricks Limited | Alfreton | 2007 |
| Banbury Conservatories Limited | Bewdley | 2009 |
| Banbury Gunsmiths Limited | Banbury | 2008 |
| Banbury Roofing Centre Limited | Banbury | 2002 |
| Banca Restaurants Limited | Selsey | 1999 |
| Bancci Design Limited | Aylesbury | 2024 |
| Bancos Ltd | Luton | 2005 |
| Bancroft Land Limited | Gloucester | 2009 |
| Band International Limited | Wootton Bridge | 2017 |
| Band Tours Limited | Halifax | 2016 |
| Bandar Developments Limited | Coleraine | 1979 |
| Bandcash Limited | Halesowen | 1993 |
| Bandhart | Rotherham | 1980 |
| Bandit Craftworks Ltd | London | 2021 |
| Bandit Yachting Ltd | London | 2020 |
| Bandmaze Limited | Broxburn | 2000 |
| Bandon Commercial Services Limited | Nantwich | 2023 |
| Bandwidth Limited | Stonehouse | 1998 |
| Bandwidth Studios Limited | Salford | 2019 |
| Banf Trading Ltd | London | 2025 |
| Bang Bang Co Limited | London | 2020 |
| Bang Tech UK Ltd | Sandwich | 2024 |
| Banger Brothers Ltd | Whitstable | 2019 |
| Bangerz N Mash Limited | Harrow | 2018 |
| Bangkok Mama Limited | London | 2025 |
| Bangla Port Fruit and VEG Ltd | Birmingham | 2024 |
| Bangla Takeaway Ltd | Hull | 2019 |
| Bangla Town Limited | North Chingford | 2011 |
| Bangladeshi Spice Ltd | Burgess Hill | 2017 |
| Bangor Acceptances Limited | Belfast | 1982 |
| Bangor Blue Slate Co Limited | Belfast | 2010 |
| Bangor Business Solutions Ltd | Bangor | 2008 |
| Bangor Hotels Limited | Widnes | 2015 |
| Bangor Mussel Producers Limited | Bangor | 2008 |
| Banham ZOO Limited | Norwich, | 1972 |
| Banham's Yard (Hartest) Management Company Limited | Bury St. Edmunds | 2013 |
| Banico Controls Limited | Manchester | 2004 |
| Banjoko Holdings Ltd | South Ockendon | 2020 |
| Bank Lock Ltd | Carryduff | 2007 |
| Bank of Caledonia Limited | Wallyford | 2002 |
| Bank of Scotland (B G S) Nominees Limited | Edinburgh | 1985 |
| Bank of Scotland Branch Nominees Limited | | 1998 |
| Bank of Scotland Central Nominees Limited | Edinburgh | 1920 |
| Bank of Scotland Edinburgh Nominees Limited | Edinburgh | 1926 |
| Bank of Wales Limited | London | 1971 |