| BMK Entertainment Ltd | Belfast | 2020 |
| BML Spa 99 Limited | London | 2025 |
| Bmlc Holdings Limited | Boston | 2025 |
| BMM Associates Limited | London | 2024 |
| BMM Sports Coaching Ltd | Kingston | 2025 |
| Bmma Kent Ltd | York | 2025 |
| Bmma Leeds Ltd | Wakefield | 2021 |
| Bmma Morley Ltd | London | 2024 |
| BMO Gym and Fitness Limited | Barnsley | 2025 |
| BMR Karting Limited | Buntingford | 2016 |
| BMR Motorsport Limited | Rugeley | 2023 |
| BMR Productions Ltd | London | 2022 |
| BMR Racing Limited | Buntingford | 2014 |
| Bmsa Limited | Bristol | 1996 |
| Bmss Performing Arts Limited | Hornchurch | 2014 |
| BMT Productions Ltd | Southampton | 2019 |
| Bmtg Fighter & Events Limited | Hornchurch | 2023 |
| Bmth Music Limited | Sheffield | 2013 |
| Bmth Touring Limited | Sheffield | 2013 |
| BMV Health & Fitness Ltd | Shaftesbury | 2013 |
| Bmvit Ltd | Warrington | 2024 |
| BMX Academy Limited | Welwyn Garden City | 2015 |
| BMX Sponsorship Ltd | Pinner | 2025 |
| Bmzp Ltd | London | 2022 |
| BN Music Ltd | London | 2021 |
| BN Songs Ltd | London | 2025 |
| BN Sports Ltd | Tunbridge Wells | 2025 |
| BN1 Events Collective Ltd | Hove | 2023 |
| BN1 Funfair Rides Limited | Bognor Regis | 2015 |
| BN14 Art Studios Ltd | Worthing | 2017 |
| BN1SPORTS Limited | Hove | 2009 |
| Bnb's Inflatable Hire Limited | Bradford | 2017 |
| Bnbselect.Com Limited | Bedford | 2009 |
| Bnkrz Music Limited | Cardiff | 2025 |
| BNM Investment Limited | Hornchurch | 2024 |
| BNP Sports Ltd | London | 2025 |
| Bnsgc 2016 Limited | Blackpool North Shore | 2016 |
| Bntva Museum CIC | Derby | 2024 |
| Bo'Ness Enterprises Limited | Boness | 2000 |
| Bo'Ness Motor Museum | Bo'Ness | 2012 |
| Bo'Ness United Football Club | Grangemouth | 2011 |
| Boagart Limited | Stonehaven | 2001 |
| Board Breaks Ltd | Bideford | 2023 |
| Board Game Museum Ltd | Hastings | 2022 |
| Board Games Surfing Limited | Haverfordwest | 2013 |
| Board Gaming Limited | Morden | 2025 |
| Board in the City London Ltd | London | 2026 |
| Board Limited | Teignmouth | 2017 |
| Board of Deputies Jewish Heritage | London | 2008 |
| Board Riding Development Limited | Burry Port | 2008 |
| Boardability CIC | Burry Port | 2014 |
| Boarder Control Ltd | Brighton | 2025 |
| Boardgamesbren Ltd | Frome | 2022 |
| Boardman James Productions Ltd | Bolton | 2001 |
| Boardmasters Limited | London | 2014 |
| Boardroom Committeeroom CIC | Glasgow | 2023 |
| Boat Life Events Ltd | London | 2020 |
| Boatcation Limited | Cardiff | 2020 |
| Boatfolk Marinas Limited | Southampton | 1992 |
| Boatyard Boulders CIC | Nottingham | 2024 |
| BOB Barker Ltd | Baildon | 2015 |
| BOB Cooper Productions Ltd | Manchester | 2021 |
| BOB Dixon (Cambridge) Limited | Histon | 1992 |
| BOB Eaton Studio Ltd | Hinckley | 2025 |
| BOB Hall Greyhounds Ltd | Coventry | 2015 |
| BOB Hanley Ltd | Knutsford | 2023 |
| BOB Harte Memorial Trust | | 2005 |
| BOB Moncur Limited | Tyne & Wear | 2002 |
| BOB Moran Limited | Kington | 2021 |
| BOB Prophette Ltd | Dinbych | 2026 |
| BOB Prowse Gym Limited | Maidstone | 2003 |
| BOB the Film Ltd | London | 2025 |
| BOB Wilson & Sons Limited | Birmingham | 1971 |
| BOB Wilson 2000 Limited | Rushden | 2000 |
| BOB Wilson Funfairs Limited | Birmingham | 1978 |
| Bob's Your Uncle Limited | Sheffield | 2003 |
| Bob-A-Job (Lincolnshire) Limited | Scunthorpe | 2018 |
| Boba Fett Ltd | Cardiff Gate Business Park | 2019 |
| Bobalinga Ltd | Bristol | 2010 |
| Bobbie JAY Events Ltd | Biggleswade | 2021 |
| Bobbies Gym Limited | London | 2016 |
| Bobbin Mill Shooting Ground Ltd. | Preston | 2018 |
| Bobbing Along Limited | Milton Keynes | 2017 |
| Bobby Dazzler Signs Limited | Huddersfield | 2002 |
| Bobby Fit Limited | Blackpool | 2003 |
| Bobby Grant Coaching Ltd | Liverpool | 2025 |
| Bobby Lammie Ltd | Stranraer | 2025 |
| Bobby Millican Equestrian Ltd | Bishop Auckland | 2025 |
| Bobby Pinto Coaching Ltd | London | 2026 |
| Bobby West Scenic Art Ltd | Stevenage | 2020 |
| Bobby's Sports Ltd | Bishop Auckland | 2026 |
| Bobbyfives Ltd | Aberdeen | 2022 |
| Bobcreative Ltd | Enfield | 2019 |
| Bobmac Golf Limited | Oban | 2017 |
| Bobo 1325 Limited | Sunderland | 2015 |
| Bobo Cassidy Limited | Chesham | 2019 |
| Bobo Creative Ltd | Bristol | 2025 |
| Bobs BOOKS66 Ltd | London | 2026 |
| Bobteddy Images Limited | Carterton | 2015 |
| BOC Escapes Ltd | Newcastle Upon Tyne | 2024 |