| Blueprint Fitness Ltd | Neilston | 2022 |
| Blueprint Kitchen Solutions Limited | Plymouth | 2017 |
| Blueprint Machines NI Limited | Newtownabbey | 2025 |
| Blueprint Marine Limited | Bristol | 2012 |
| Blueprint Motorsport Ltd | London | 2026 |
| Blueprint Music Ltd | London | 2019 |
| Blueprint of Zion Limited | Enfield | 2018 |
| Blueprint Performance Ltd | Glasgow | 2021 |
| Blueprint Recording Corporation Limited | Southwark | 2000 |
| Blueprint Rights Ltd | London | 2026 |
| Blueprint Studios Limited | Manchester | 2004 |
| Blueprint Theatre and Film Ltd. | London | 2011 |
| Blueprint Training Limited | Worcester | 2015 |
| Blueprint Worldwide Events Ltd | Woking | 2010 |
| Blueprints Collective Ltd | Stanmore | 2015 |
| BLUEPRINTVOL1 Ltd | Hereford | 2023 |
| Blues Events Ltd | Dunstable | 2021 |
| Blues Explosion Ltd | Sheffield | 2024 |
| Blues Roots | Swanage | 2010 |
| Bluesea Sports Ltd | London | 2024 |
| Blueskies Simulators Ltd | Newcastle Upon Tyne | 2020 |
| Bluesky Experiences at Deene Park Limited | Corby | 2023 |
| Bluesky Experiences Ltd | Perth | 2001 |
| Bluesky Tennis Limited | Bath | 2019 |
| Bluespace Fitness Ltd | Ashby-De-La-Zouch | 2025 |
| Bluestar Designs Limited | | 1997 |
| Bluestone Films Limited | Bradford | 2004 |
| Bluestone Fitness Limited | Ashby-De-La-Zouch | 2016 |
| BLUESTONE360 Limited | Plymouth | 1988 |
| Bluet Studio Ltd | Doncaster | 2019 |
| Bluewater Pools & Leisure Limited | Christchurch | 2000 |
| Bluewave Events Ltd | Basingstoke | 2026 |
| Bluewood Management Limited | Bromsgrove | 2024 |
| Bluexiii Biotech Limited | Rowlands Gill | 2026 |
| Bluku Music Limited | Abingdon | 2018 |
| Blum Services Ltd | London | 2026 |
| Blundells Hill Golf Club Limited | Prescot | 1992 |
| Blundellsands Bridge Club Limited | Liverpool | 1968 |
| Blundellsands Lawn Tennis Club Ltd | Liverpool | 2018 |
| Blunder of the Year Limited | Colwyn Bay | 2023 |
| Blunt Media Limited | Macclesfield | 1991 |
| Blunts Farm Estate Limited | London | 2001 |
| Bluparti CIC | Birchington | 2025 |
| Blurton Reds FC CIC | Stoke-On-Trent | 2018 |
| Blush and Bloom Limited | Selby | 2020 |
| Blush Cloud Limited | London | 2020 |
| Blush Dance Kids Ltd | Wilmslow | 2025 |
| Blush Dance Limited | Wilmslow | 2012 |
| Blush Talent Management Limited | Bath | 2023 |
| Blush Tanning Salons Limited | Glasgow | 2017 |
| Bluum Pilates Ltd | London | 2026 |
| Bluvision Studios Ltd | Croydon | 2025 |
| Bluzone Ltd | London | 2026 |
| BLV24 Limited | Sheffield | 2020 |
| Blvckboxglobal Limited | London | 2021 |
| Blxd Productions Ltd | Canterbury | 2025 |
| Blystra Arts C.I.C. | Newquay | 2017 |
| Blyth Battery Volunteers Limited | Blyth | 2012 |
| Blyth Golf Club Limited(The) | Blyth | 1908 |
| Blyth Music & Theatre Company Limited | North Shields | 2003 |
| Blyth Spartans 2024 C.I.C. | Blyth | 2024 |
| Blyth Spartans Association Football Club Limited | Blyth | 1946 |
| Blyth Town Football Club Ltd | Cramlington | 2021 |
| BM Art Ltd | Ruislip, | 2026 |
| BM Coaching Ltd | Dudley | 2018 |
| BM Copa Ltd | London | 2025 |
| BM Copa Productions Ltd | London | 2025 |
| BM Events Scotland Ltd | Glasgow | 2019 |
| BM Legacy Sports Limited | Hayfield | 2019 |
| BM Management Limited | London | 2010 |
| BM Media Consultancy Ltd | London | 2026 |
| BM MK Ltd. | Milton Keynes | 2018 |
| BM Promotional Leisure Limited | Beaconsfield | 2014 |
| BM Rigging Limited | Benfleet | 2012 |
| BM Sport Consulting Limited | London | 2017 |
| BM Sports Events Limited | Leyland | 2023 |
| BM Sports Limited | Uxbridge | 2024 |
| BM1 Coaching C.I.C. | London | 2026 |
| BMA Sport Academy Ltd | London | 2021 |
| Bmaba CIC | Petworth | 2017 |
| BMB Creative Ltd | Milton Keynes | 2013 |
| BMB Fitness Limited | Yeovil | 2023 |
| Bmbb Residents Assocation Limited | Manchester | 2025 |
| BMC Collective Ltd | London | 2024 |
| BMC Commercial Events Limited | Chatham | 2026 |
| BMC Marine Limited | Southampton | 2024 |
| BMC Pilates II Ltd | Wembley, Middlesex | 2024 |
| BMC Pilates III Ltd | Wembley | 2026 |
| BMC Pilates Ltd | Wembley, Middlesex | 2020 |
| BMC Promotions Ltd | Liverpool | 2025 |
| Bmca (1983) Limited | Dudley | 2004 |
| Bmdm Events and Media Limited | Brighton | 2019 |
| BME Trading Ltd | London | 2026 |
| BMF Franchising UK Limited | London | 2020 |
| BMF Holdco Limited | London | 2020 |
| BMF Media Limited | London | 2013 |
| Bmfj Ltd | London | 2008 |
| BMG Production Music (UK) Limited | London | 2010 |
| BMG Productions Ltd | Manchester | 2017 |
| BMG Sports Limited | Chester Le Street | 2018 |