| Boost Yoga CIC | Huddersfield | 2026 |
| Boost Your a Levels Limited | Harlow | 2023 |
| Boost Your Grades Ltd | Sheffield | 2025 |
| Boostas Group Ltd | Kington | 2024 |
| Boosted Active Hubs Ltd | Colchester | 2024 |
| Booster Learning Limited | Birmingham | 2020 |
| Boosterschool Limited | Doncaster | 2026 |
| Boostsup Ltd | Sheffield | 2025 |
| Boot Academy Limited | High Wycombe | 2023 |
| Boot Camp Fitness Limited | Wolverhampton | 2009 |
| Boot UP! CIC | Truro | 2014 |
| Bootcamp Academy Limited | London | 2025 |
| Booth's Education Services and Tutoring Ltd | Clacton-On-Sea | 2022 |
| Bootham School | North Yorkshire | 1982 |
| Bootle Canoe Club CIC | Bootle | 2021 |
| Boots in Nature Ltd | Harlow | 2025 |
| Boots N Boogie Ltd | Rugby | 2026 |
| Boots on Equine Adventures C.I.C. | Hindley Green | 2026 |
| Booty Bass CIC | Bristol | 2025 |
| Bopeeps Preschool Ltd | Plumstead | 2011 |
| Boph Ltd | Sheffield | 2023 |
| BOR Education Ltd | London | 2024 |
| Borda Limited | Hebden Bridge | 2025 |
| Borden Grammar School Trust | Sittingbourne | 2011 |
| Borden Village PRE School Limited | Canterbury | 2008 |
| Border Links Limited | Berwick-Upon-Tweed | 2006 |
| Border-Clash C.I.C. | Cardiff | 2025 |
| Borderlands Collective Limited | Ludlow | 2025 |
| Borderlands Foundation UK Ltd | London | 2025 |
| Borderlands Outdoor Instruction Ltd | Monmouth | 2019 |
| Borderless Education Services Ltd | Solihull | 2024 |
| Borderlines Film Festival C.I.C. | Craven Arms | 2004 |
| Borders Bike Training Ltd | Duns | 2024 |
| Borders Organic Gardeners | 3 Oliver Place Hawick | 2005 |
| Borders School of Music Ltd | Kelso | 2022 |
| Borders Technical Training Association Ltd | Galashiels | 2024 |
| Borders Third Sector Interface Ltd | Melrose | 2023 |
| Bordesley Multi-Academy Trust | Redditch | 2011 |
| Bordon Amateur Boxing Club CIC | Bordon | 2022 |
| Borg Training Limited | Fareham | 2020 |
| Boricuacats Ltd | Bexhill-On-Sea | 2017 |
| Born 2 Compete Limited | Manchester | 2024 |
| Born at the Right Time CIC | Southend-On-Sea | 2022 |
| Born for a Purpose Empowerment Centre CIC | Stoke-On-Trent | 2020 |
| Born for This CIC | Maidstone | 2026 |
| Born on 1ST CIC | London | 2026 |
| Born to BE - OT Ltd | Liphook | 2026 |
| Born to BE UN Limited | London | 2019 |
| Born to BEE Happy Ltd | Swindon | 2020 |
| Born to Bond CIC | Hull | 2022 |
| Born to Excel Ltd | London | 2013 |
| Born to Shine Challenge Ltd | London | 2007 |
| BORN2SWIMUK Ltd | Brighton | 2023 |
| Borocuda Limited | Middlesbrough | 2016 |
| Borocuda Teesside Amateur Swimming Club CIC | Middlesbrough | 2022 |
| Boromi Ltd | London | 2017 |
| Borough College London Qualifications Limited | London | 2016 |
| Borough Learning Ltd | London | 2018 |
| Borrow My Belief Ltd | Edinburgh | 2024 |
| Boruc AFC Limited | Poole | 2021 |
| Borussia Digitals Sporting Academy CIC | Southampton | 2025 |
| BOS Homeschooling Ltd. | London | 2020 |
| Bosco Arts Ltd | Armagh | 2020 |
| Bosco Catholic Education Trust | Burgess Hill | 2017 |
| Bosh Boxing Ltd | Solihull | 2020 |
| Bosh School of Motoring Ltd | London | 2023 |
| Bosham Tutors Ltd | Chichester | 2025 |
| Bosky Beths | Ruislip, | 2024 |
| Boss Birches CIC | Wallasey | 2021 |
| Boss Consultants Ltd | Manchester | 2025 |
| Boss Elite CIC | Ely | 2020 |
| Boss Socials Coaching Ltd | Beverley | 2025 |
| Boss Your Numbers Ltd | High Wycombe | 2024 |
| Bossette CIC | London | 2025 |
| Bosseuro Limited | Moreton-In-Marsh | 1996 |
| Bossingham Preschool Ltd | Canterbury | 2013 |
| Bossmaths Ltd | London | 2017 |
| Bosss (UK) Limited | Gerrards Cross | 2002 |
| Bossy BEE Driving Instructor Ltd | Luton | 2025 |
| Bostock Training Limited | Norwich | 2019 |
| Boston Academies Umbrella Trust | Boston | 2013 |
| Boston College Group Limited | Boston | 1993 |
| Boston Grammar School | Boston | 2012 |
| Boston High School | Boston | 2012 |
| Boston LGV Training Limited | Boston | 2003 |
| Boston Management and Law Business School Ltd | Norwich | 2018 |
| Boston Test Centre Limited | Chesterfield | 2024 |
| Boston University (USA) London | | 1995 |
| Boston University USA (Europe) Limited | | 2001 |
| Boston West Joint Childcare Company Ltd | Boston | 1999 |
| Boston's Training and Consultancy Ltd | London | 2025 |
| Bostonair Technical Training Ltd | Beverley | 2007 |
| Bosworth Independent School Limited | Cambridge | 1997 |
| BOT Geniuses Limited | Eastleigh | 2024 |
| BOT Solutions 1 Ltd | Bromsgrove | 2025 |
| Botanical Engineers Ltd | Brigg | 2021 |
| Botero Speech 4 Kids Ltd | London | 2024 |
| Botleague Ltd | Cranbrook | 2025 |
| Bottesford Bunnies Limited | Scunthorpe | 2010 |
| Bottisham School of Motoring Ltd | Cambridge | 2011 |