| Bankstone Limited | Waltham Cross | 2004 |
| Bankwood Meats Trustee Limited | Doncaster | 2025 |
| Banmiru Ltd | Corby | 2025 |
| Banner Fire and Security Ltd | Southport | 2012 |
| Bannerman Consulting Engineers Ltd. | Upminster | 2002 |
| Banners Court Residents Association Limited | Birmingham | 1982 |
| Bannister's Barbers Limited | Matlock | 2018 |
| Bannits Limited | Oxford | 2004 |
| Bannon Wright (Holdings) Limited | Liverpool | 2020 |
| Bannons Properties & Rentals Ltd | Liverpool | 2020 |
| Banns & Plans Limited | Brentwood | 2024 |
| Banonymous Ltd | Brighton | 2020 |
| Banshee Tattoo Ltd | Newcastle Upon Tyne | 2025 |
| Banshee Taverns Limited | London | 2025 |
| Banstead Barbers Ltd | Banstead | 2025 |
| Banstead Hand Car Wash Ltd | London | 2013 |
| Banstead Nails 88 Ltd | Banstead | 2021 |
| Banstead Physio & Therapies Limited | Banstead | 2004 |
| Banter Spirit Ltd | Leeds | 2022 |
| Banus Beds Ltd | Chorleywood | 2026 |
| Banusha Ltd | Manchester | 2025 |
| Banwait Associates Ltd | Gravesend | 2016 |
| Banya London Ltd | London | 2023 |
| Banyan Enterprises Limited | Derby | 2025 |
| Banyan Tree Answers Ltd | Cheshire | 2013 |
| Banza Ltd | London | 2015 |
| Banzeego Ltd | London | 2020 |
| Banzi Group Ltd | London | 2026 |
| BAO an Nails Bar Ltd | Greenock | 2026 |
| BAO an Nails Limited | Romford | 2023 |
| BAO an NCL Ltd | Newcastle Upon Tyne | 2026 |
| BAO Minh Limited | London | 2022 |
| BAO NAM Ltd | Barry | 2024 |
| BAO YEN Limited | London | 2019 |
| Baobab & Butter Ltd | Milton Keynes | 2025 |
| Baobab Ebooks Services Limited | Exeter | 2013 |
| Baobab Property Management Ltd | London | 2016 |
| Baobab Solution Limited | Cardiff | 2019 |
| Baohan Ltd | Welwyn Garden City | 2024 |
| Baosa '80 | Barking | 2021 |
| Baozi Bros Ltd | Lytham St. Annes | 2024 |
| Bapd Limited | Pinner | 2018 |
| Bapio Limited | Bedford | 2006 |
| Bapo Limited | Glasgow | 2004 |
| Bapp Industrial Supplies (Scunthorpe) Limited | North Lincolnshire | 1995 |
| Bapr Ltd | Sale | 2025 |
| Baptist Chapel Court (Chipping Sodbury) Management Company Limited | Chipping Sodbury | 2013 |
| Baptist House Limited | Didcot | 1989 |
| Baptist Missionary Society Corporation,(The) | Didcot | 1888 |
| Baptist Union Corporation Limited(The) | Didcot | 1890 |
| Bapty & Co. Limited | London | 1937 |
| Bapty Holdings Limited | London | 2016 |
| Bapty Management Limited | London | 2016 |
| Bapu Holdings Limited | Glasgow | 2017 |
| Bar & Barber Limited | London | 2022 |
| Bar 67 Glasgow Ltd | Glasgow | 2015 |
| Bar and Boujee Ltd | London | 2018 |
| Bar Angels Promotions Ltd | Barnsley | 2013 |
| Bar Bar. Co Brentwood Ltd | Palmers Green | 2023 |
| Bar Beauty Ltd | Coventry | 2019 |
| Bar Cafe 222 Ltd | Dagenham | 2019 |
| Bar Code Systems (London) Limited | London | 1999 |
| Bar DE Beaute Limited | Barnsley | 2023 |
| Bar Excellence Limited | Newcastle Upon Tyne | 2022 |
| Bar Fittings Limited | Leigh On Sea | 2000 |
| Bar Lane Management Company Limited | Princes Risborough | 2001 |
| Bar Nineteen Limited | London | 2026 |
| Bar Rumba Ltd | Plymouth | 2025 |
| Bar Salon Limited | London | 2021 |
| Bar Turkish Barber 3 Ltd | Chester | 2021 |
| Bar Wala Ltd | Southall | 2019 |
| Bar-N-Bus Trust | Basildon | 1994 |
| Bar.None (Salons) Limited | Abercynon | 2021 |
| Bar.None Limited | Abercynon | 2018 |
| Baraka Appliances Ltd | Northampton | 2026 |
| Baraka Bodyworks Ltd | Manchester | 2025 |
| Baraka E Limited | Northampton | 2026 |
| Barakacity Ltd. | Birmingham | 2016 |
| Barakah Investment Ltd | London | 2020 |
| Barakah Money Transfer Ltd | London | 2012 |
| Barakah UK Limited | London | 2007 |
| Barakah's Enterprise Ltd | Liverpool | 2021 |
| Barakahandsuk | London | 2025 |
| Barakat ALA Barakat Limited | Leeds | 2020 |
| Barako Relief Ltd | Leicester | 2025 |
| Barali Ltd | Rochdale | 2012 |
| Baram Hammond Gardens Ltd | Hertfordshire | 2003 |
| Baran Barber 1 Ltd | Morecambe | 2026 |
| Baran Barber Salon Ltd | Sheffield | 2026 |
| Baran Barber Shop Limited | Sheffield | 2021 |
| Baran Barbers Ltd | Cardiff | 2019 |
| Baran Barbers Wakefield Ltd | Wakefield | 2025 |
| Baran Gents Barbers Limited | London | 2026 |
| Baran Shave Ltd | Birkenhead | 2026 |
| Barans Barbers Ltd | Sheffield | 2019 |
| Baranswift Limited | Chester | 1999 |
| Barant Limited | Banchory | 2011 |
| Baravalla Limited | Tarbert | 2015 |
| Barax Limited | Cheltenham | 2016 |
| BARB333RS Ltd | London | 2025 |