| Baybasin Property Maintenance Services Ltd | Edgware | 2026 |
| Baybays Beauty Ltd | Gateshead | 2016 |
| Baycity Associates Limited | London | 2024 |
| Baycity Homes Limited | London | 2025 |
| Baycity International Limited | London | 2022 |
| Baycity Services Limited | London | 2022 |
| Baycity Trade Limited | London | 2025 |
| Baycity Trading Limited | London | 2025 |
| Baycom Limited | London | 2025 |
| Baycom Trading Limited | London | 2026 |
| Baydaza Limited | Heanor | 2025 |
| Baydell Limited | London | 2026 |
| Baydem Limited | Macclesfield | 2022 |
| Baydene Limited | London | 2026 |
| Bayeux Court (Bexhill-On-Sea) RTM Company Limited | Bexhill-On-Sea | 2004 |
| Bayfall Limited | | 2004 |
| Bayforce International Limited | London | 2025 |
| Baygas Limited | Caton Road | 1997 |
| Bayham Abbey Residents Association Limited | Tunbridge Wells | 1977 |
| Bayhill Ventures Limited | Stockport | 2023 |
| Bayit Zahav Ltd | Cardiff | 2016 |
| Baykar London Limited | London | 2014 |
| Baykar Ltd | London | 2018 |
| Bayleaf Consulting Limited | Pulborough | 2013 |
| Bayley & Sage (Home) Ltd | London | 2019 |
| Bayley Brothers Hereford Limited | Sutton Coldfield | 1938 |
| Baylis & Peet Hair Ltd | Rugby | 2022 |
| Baylis Associates UK Ltd | Tunbridge Wells | 2025 |
| Baylis Traffic Management Ltd | Slough | 2024 |
| Baylynx Trading Limited | London | 2026 |
| Baymaan Chicken Ltd | Blackburn | 2024 |
| Baymer Solutions Limited | London | 2016 |
| Baymoor Limited | London | 2026 |
| Baymore Investments Limited | Magherafelt | 1993 |
| Baynhall Holdings I Ltd | Kingswinford | 2022 |
| Bayplus Limited | Sutton Coldfield | 1989 |
| Baypower Engineers Limited | Lancashire | 2002 |
| Baypower Welding Services Limited | Morecambe | 2024 |
| Bayrak London Limited | Bristol | 2021 |
| Bays Hamedrash Eitz Chaim Limited | Salford | 2016 |
| Baysal & Co Grooming Ltd | Poole | 2026 |
| Baysal Barber Ltd | Chesterfield | 2024 |
| Bayse Reformer Pilates Altrincham Ltd | Warrington | 2025 |
| Bayse Reformer Pilates Bolton Ltd | Oldham | 2025 |
| Bayse Reformer Pilates Cardiff Ltd | Warrington | 2025 |
| Bayse Reformer Pilates Liverpool Ltd | Warrington | 2025 |
| Bayse Reformer Pilates Preston Ltd | Warrington | 2025 |
| Bayse Reformer Pilates Stockton Heath Ltd | Warrington | 2025 |
| Bayse Reformer Pilates Stoke Ltd | Warrington | 2025 |
| Bayse Reformer Pilates Swansea Ltd | Warrington | 2025 |
| Bayse Reformer Pilates Wilmslow Ltd | Warrington | 2025 |
| Bayside Aesthetics Ltd | Stoke-On-Trent | 2020 |
| Bayside Aesthetics Walsall Ltd | Walsall | 2023 |
| Bayside Associates Limited | Ascot | 2023 |
| Bayside Barber Co. Ltd | Cardiff | 2025 |
| Bayside Beauty Clinic Ltd | Stoke-On-Trent | 2018 |
| Bayside International Limited | London | 2024 |
| Bayside Medspa Stoke Ltd | Stoke-On-Trent | 2023 |
| Bayside Solutions Limited | London | 2024 |
| Bayside Studio Limited | London | 2024 |
| Bayside Traders Limited | London | 2025 |
| Bayside Trading Limited | London | 2024 |
| Bayson Claim and Building Solutions Ltd | Worksop | 2025 |
| Baystar Limited | Dorking | 2011 |
| Bayswater Computer Systems Limited | Leeds | 2003 |
| Bayswater Court Management Company Limited | | 1992 |
| Bayswater Vacation Homes Ltd | London | 2017 |
| Bayt AL Qaim Islamic Centre (Bradford) | Bradford | 2015 |
| Bayt M S Limited | Lancaster | 2020 |
| Baytan Limited | Swansea | 2022 |
| Bayteam Limited | London | 2024 |
| Baytech Limited | London | 2026 |
| Baytona Limited | London | 2001 |
| Baytree Beauty Ltd | Fareham | 2013 |
| Baytree Consulting Limited | Chester | 2015 |
| Baytree Garden Contractors Limited | Herts | 1982 |
| Bayview Associates Ltd | Salford | 2018 |
| Bayview Synergy Space Ltd | Newcastle | 2014 |
| Baywater Enterprise Limited | Alton | 2024 |
| Baywater Technology Limited | London | 2021 |
| Bayway Limited | Hove | 2005 |
| Baywood Dog Training Limited | London | 2022 |
| Bayworld Corporation Limited | London | 2026 |
| Bayzan Barber Limited | Sheffield | 2024 |
| BAZ Barber (Gatley) Ltd | Cheadle | 2020 |
| BAZ Barber Eastbourne Ltd | Leeds | 2022 |
| BAZ Barber Fade Zone Ltd | Guildford | 2023 |
| BAZ Barber Services Ltd | Birmingham | 2025 |
| BAZ Barbers Fadezone Ltd | Ferndown | 2025 |
| BAZ Barbers Limited | London | 2021 |
| BAZ CUT Ltd | Clacton-On-Sea | 2023 |
| BAZ INK Limited | Rosyth | 2016 |
| BAZ Leicester Ltd | Leicester | 2025 |
| BAZ Marple Limited | Stockport | 2022 |
| BAZ Style Ltd | Glasgow | 2026 |
| Baz's Barber Leicester Ltd | Leicester | 2025 |
| BAZ1 Ltd | Abingdon | 2023 |
| Baza's Barber Durham Ltd | Durham | 2026 |
| Bazaar Plus Ltd | London | 2024 |
| Bazaari Limited | Mitcham | 2012 |