| Backstage Productions Live Ltd | London | 2023 |
| Backstage Publishing Company Limited | | 1990 |
| Backstory Ensemble Productions Ltd | London | 2020 |
| Backstory Entertainment Ltd | London | 2017 |
| Backstreet Games Ltd | London | 2020 |
| Backstreets Entertainment Limited | Milton Keynes | 2021 |
| Backtoback Theatre Company Limited | Lymington | 2022 |
| Backup Rigging Limited | Fordingbridge | 2008 |
| Backwater Activities Ltd | Newron Abbot | 2018 |
| Backwell Playing Fields Corporate Trustee Limited | Backwell | 2015 |
| Backwith Music Limited | Rugby | 2013 |
| Backwoodsman Limited | Huntingdon | 2005 |
| Backyard Birdies Ltd | London | 2024 |
| Backyard Boxing Limited | Dorking | 2024 |
| Backyard Events Ltd | London | 2026 |
| Bacon the Play Limited | Sittingbourne | 2023 |
| Bacon's College Community Services Limited | Peterborough | 2004 |
| Bacsc Limited | Chesterfield | 2006 |
| Bacta Self-Exclusion Services Limited | London | 2016 |
| Bacup Borough Football Club Limited | Bacup | 2006 |
| Bacup Golf Club Limited(The) | Bacup | 1946 |
| Bacup Little Theatre Ltd | Bury | 2025 |
| Bacup Royal Court Theatre Group Ltd | Bacup | 2016 |
| BAD APE Limited | Woodford Green | 2025 |
| BAD Apple Hair UK Ltd | Birmingham | 2008 |
| BAD Art Life Limited | Edgware | 2019 |
| BAD at Sports Club Ltd | London | 2024 |
| BAD Balloon Limited | Exeter | 2016 |
| BAD Bird Limited | London | 2010 |
| BAD Bitch Limited | Wilmslow | 2024 |
| BAD Breeding Limited | Manchester | 2015 |
| BAD Colour Ltd | London | 2025 |
| BAD Company Entertainment Limited | London | 1974 |
| BAD Company Gym Limited | Chesterfield | 2023 |
| BAD Decisions Entertainment Limited | London | 2025 |
| BAD Dog Films Ltd | Northampton | 2004 |
| BAD Flowers Music Ltd | Lichfield | 2018 |
| BAD FUN Events Ltd | Sale | 2021 |
| BAD Gear Ltd | Chadwell Heath | 2025 |
| BAD George Ltd | Biggleswade | 2024 |
| BAD Luck Tattoo Co Ltd | Droitwich | 2025 |
| BAD Management Ltd | Nuneaton | 2024 |
| BAD Medic Records Limited | Liverpool | 2022 |
| BAD Mollys Limited | Rainhill | 2021 |
| BAD Monkey Pictures Limited | London | 2015 |
| BAD PAD Sports Ltd | Bolton | 2024 |
| BAD Passions Limited | London | 2026 |
| BAD Poodle Limited | London | 2024 |
| BAD Production Ltd | Nuneaton | 2024 |
| BAD Racing Limited | Sandy | 2021 |
| BAD Rituals Ltd | London | 2019 |
| BAD Seed Limited | London | 2012 |
| BAD Taste Recordings Limited | Aylesbury | 2011 |
| BAD to the Bone BKB Limited | Stoke-On-Trent | 2022 |
| BAD Vibrations Limited | London | 2016 |
| BAD With Names Ltd | Glasgow | 2025 |
| BAD Wolf Theatre Company Ltd | Skipton | 2012 |
| Bada Bing Productions Limited | London | 2010 |
| Bada Bling Limited | Warrington | 2006 |
| Badac Theatre Company Limited | Edinburgh | 1999 |
| Badanloch Estates Limited | London | 1991 |
| Badapple Theatre Company | York | 2002 |
| Badass Jewellery Ltd | Spalding | 2018 |
| Baddie Tattoos Ltd | Sheffield | 2023 |
| Baddies Management Ltd | London | 2025 |
| Badenheath Trading Ltd | Elgin | 2020 |
| Badenoch Community Project | Inverness-Shire | 1996 |
| Badge Cafe and Company Ltd | London | 2025 |
| Badge Cafe CIC | London | 2026 |
| Badgells Wood Limited | West Malling | 2012 |
| Badgeman Promotions Ltd | Southampton | 2025 |
| Badger & Beinart Limited | Welshpool | 2014 |
| Badger & FOX Limited | Edenbridge | 2013 |
| Badger BJJ Company Limited | Hindhead | 2019 |
| Badger Motorsport Limited | Preston | 1994 |
| Badger Racing Limited | Bristol | 2009 |
| Badgerfox Tickets Ltd | Brentwood | 2023 |
| Badgers Hill Ltd | Westbury | 2025 |
| Badgers Tennis Club Ltd | Brighton | 2013 |
| Badgirlsounds Ltd | London | 2023 |
| Badinage | Fressingfield | 1992 |
| Badindian Ltd | London | 2024 |
| Badlandz Limited | Littlehampton | 2019 |
| Badly Drawn Artist Ltd | Crosby | 2016 |
| Badly Drawn BOY Music Limited | Manchester | 2001 |
| Badminton Academy Social Enterprise C.I.C. | Glasgow | 2021 |
| Badminton Bible Limited | Tadworth | 2004 |
| Badminton Go Ltd | London | 2021 |
| Badminton Horse Trials Ltd | Gloucestershire | 1996 |
| Badminton Insight Ltd | Wirral | 2021 |
| Badminton Strength Ltd | Glasgow | 2024 |
| Badshah Creative Solutions Limited | London | 2014 |
| Badshot LEA Football Club Ltd | Aldershot | 2013 |
| Badu Sports (Broaden. Advance. Develop. Understand) Ltd | London | 2009 |
| Badudas Sports Consulting Limited | Romford | 2026 |
| Badvibes Entertainment Ltd | London | 2025 |
| BAE Reformer Ltd | Bromley | 2026 |
| Baes FC CIC | London | 2025 |
| Bafa Contemporary UK Limited | London | 2017 |
| Bafflegab Productions Ltd | Faversham | 2018 |