| Billingham International Folklore Festival Limited | Stockton On Tees | 1999 |
| Billingham Junior Ice Hockey Club Ltd | Durham | 2020 |
| Billingham Town Association Football Club Limited | Billingham | 2018 |
| Billingley Village Community Association Limited | Barnsley | 2004 |
| Billingshurst Romans Rugby Club Ltd | Billingshurst | 2026 |
| Billington Strength & Fitness Limited | Ilkley | 2012 |
| Billion Watt Photography Ltd | Amersham | 2012 |
| Billionaire Comedy Club Ltd | London | 2024 |
| Billionaire Fitness Ltd | London | 2021 |
| Billy 17 Limited | Bromsgrove | 2025 |
| Billy Adams Boxing Limited | Leigh-On-Sea | 2025 |
| Billy Bates & Sons Leisure Limited | Leicester | 1990 |
| Billy Cooper Limited | Harrow | 2017 |
| Billy Driscoll Music Limited | Bristol | 2026 |
| Billy E Thompson Ltd | Whitley Bay | 2025 |
| Billy Foster Golf Limited | Bingley | 2010 |
| Billy Garritty Racing Ltd | York | 2025 |
| Billy Gillies Limited | Belfast | 2023 |
| Billy Huxley Limited | Ilford | 2016 |
| Billy Manning Limited | Waterlooville | 1961 |
| Billy Marchant Limited | Rayleigh | 2022 |
| Billy Marsh Associates Limited | London | 1987 |
| Billy Monger Racing Ltd | Westerham | 2018 |
| Billy Mumford Limited | Bridport | 2024 |
| Billy Murphy Art Ltd | Leigh-On-Sea | 2026 |
| Billy Nomates Limited | Northumberland | 2004 |
| Billy Pearce Entertainment Limited | Wakefield | 2003 |
| Billy Seymour Limited | Waltham Abbey | 2016 |
| Billy Smells of Roses Ltd | Looe | 2023 |
| Billy Stockwell Ltd | London | 2025 |
| Billy Yates Music Ltd | Bedford | 2024 |
| Billys Gym and Wellness Centre CIC | Maeteg | 2023 |
| Billz Equestrian Limited | Egham | 2012 |
| Bilsoy Limited | London | 2018 |
| Bilston Town Community Football Club Limited | Birmingham | 2013 |
| Bilton and Woodfield Community Library Group | Harrogate | 2012 |
| Bilton Jeans Ltd | Doncaster | 2008 |
| Bilton Tennis Club Limited | Rugby | 1993 |
| Biltone Limited | Liverpool | 2005 |
| Bimb Music Ltd | Thatcham | 2025 |
| Bimfa Ltd | London | 2025 |
| Bimi Fit Ltd | Liverpool | 2025 |
| Bimini Creative Ltd | London | 2020 |
| Bimma ENT Limited | Mildenhall | 2025 |
| BIN Game Ltd | Devizes | 2026 |
| Binalong Bay Ltd | London | 2025 |
| Binary Fitness Ltd | London | 2017 |
| Binary Promotions Limited | Manchester | 2019 |
| Binch Racing Ltd | Mansfield | 2022 |
| Bind Body & Mind Ltd | Abingdon | 2026 |
| Bind Yoga Ltd | Norwich | 2018 |
| Binding Group Limited | Bristol | 2012 |
| Binfield 10K CIC | Bracknell | 2019 |
| Binfield Football Club Limited | Bracknell | 2004 |
| Bing Bong Limited | London | 2026 |
| Bing Fitness Ltd | Alfreton | 2022 |
| Bingham Healthy Minds & Bodies Ltd | Nottingham | 2025 |
| Bingley Bowling Green Club Company Limited(The) | Bingley | 1903 |
| Bingly Bongly Productions Limited | London | 2001 |
| Bingo Nederland Ltd | Cardiff | 2025 |
| Bingo Parties Ltd | Ferndown | 2025 |
| Bingo Thats Bonkers Ltd | Nelson | 2021 |
| Bingo Wings Limited | Newcastle Upon Tyne | 2006 |
| Bingo Wonderland Ltd | Huntingdon | 2022 |
| BINGO2U Limited | Liverpool | 2025 |
| Bingoal Holdings Limited | Hartlepool | 2022 |
| Bingothon C.I.C. | Cardiff | 2021 |
| Binky Nixon Photography Limited | Bedford | 2018 |
| Binnacle Films UK Ltd | London | 2026 |
| Binns Organ Trust | Nottingham | 1989 |
| Binny Golf Club Ltd | Ecclesmachan | 2020 |
| Binx&Bella Ltd | Belfast | 2019 |
| Biobrainbuddies Ltd | Gloucester | 2023 |
| Biocom Sports Performance Optimisation Ltd | Ballater | 2020 |
| Biodanza UK Limited | Stanmore | 1998 |
| Biohazard Airsoft Ltd | Ayr | 2019 |
| Biomech Therapy & Performance Ltd | Bolton | 2016 |
| Biomorphic Ltd | Guildford | 2023 |
| Bionic Dog Productions Limited | London | 2021 |
| Bionix S&C Limited | Sutton In Ashfield | 2014 |
| Biosystems Event Productions Limited | Wickford | 2020 |
| BIP - Art Ltd | Brighton | 2010 |
| Bipasha Ghosh Limited | London | 2002 |
| Birch Hall Adventures | Frinton On Sea | 2014 |
| Birch House Studios & Gallery Ltd | Winsford | 2023 |
| Birch Mount Company Ltd | Magherafelt | 2025 |
| Birch Peak Performance Ltd | Ipswich | 2022 |
| Birch Pilates Ltd | Ashford | 2026 |
| Birch Theatre Ltd | Carrickfergus | 2025 |
| Birchanger Dog Field Ltd | Bishop'S Stortford | 2012 |
| Birchberry Limited | Barry | 2007 |
| Bircher Farm Horsemanship Limited | Bircher | 2026 |
| Birches Valley Gymnastics Limited | Cannock | 2014 |
| Birchfield Sports Limited | Widnes | 2009 |
| Birchill Music Limited | Watford | 1977 |
| Birchwood Art Studio Ltd. | Edinburgh | 2020 |
| Birchwood Golf Club Limited | Warrington | 1982 |
| Bird Girl Limited | Sevenoaks | 2003 |
| Bird Hills (UK) Ltd. | Nr.Maidenhead | 1990 |
| Bird in Hand Productions Ltd | London | 2021 |