| Building Youth Support Services Limited | Stourbridge | 2025 |
| Buildmyconfidence.Net Ltd | Bedford | 2022 |
| Buildup Global Ltd | London | 2025 |
| Built by Bomi Ltd | South Croydon | 2022 |
| Built by Force Ltd | Coventry | 2025 |
| Built by NIC Limited | Cheadle | 2026 |
| Built Environment Schools Trust Ltd | Cobham | 1987 |
| Built From This CIC | Bradford | 2025 |
| Built Like Desi Ltd | Manchester | 2026 |
| Built to Endure Ltd | Southampton | 2024 |
| Built to Last London CIC | Houghton Regis, Dunstable | 2025 |
| Bukhari Academy | Birmingham | 2022 |
| Bukvaran Gradina Ltd | Dagenham | 2025 |
| Bukvaran Ltd | Dagenham | 2011 |
| Bulbul Academy of Fine Arts,(Bafa) UK Ltd | Ilford | 2024 |
| Bulgarche Ltd | Crewe | 2019 |
| Bulgaria International Medical Students Alliance CIC | Norwich | 2024 |
| Bulgarian Cultural and Learning Center - Aylesbury Ltd | Aylesbury | 2015 |
| Bulgarian Cultural and Educational Centre Scotland Limited | Haddington | 2017 |
| Bulgarian Cultural and Educational SOC. ST. Ivan Rilski CIC | Cambridge | 2014 |
| Bulgarian Folklore and Educational Centre "Vasil Aprilov" Ltd | Broadstone | 2017 |
| Bulgarian Primary Secondary Schools Colleges/Bpssc/ CIC | Chelmsford | 2018 |
| Bulgarian Saturday School Zvanche Ltd | Reigate | 2013 |
| Bulgarian School Azbukarche CIC | Glasgow | 2023 |
| Bulgarian School Chuchuliga Limited | Croydon | 2016 |
| Bulgarian School DR Petar Beron Reading Ltd | Reading | 2017 |
| Bulgarian School Leeds Ltd | Leeds | 2016 |
| Bulgarian School Ltd | London | 2019 |
| Bulgarian School Prosveta Ltd | Swindon | 2014 |
| Bulgarian School Rodna Rech Leicester Limited | Leicester | 2022 |
| Bulgarian School Watford Limited | Rickmansworth | 2015 |
| Bulgarian Sunday School "Rodolyubie" Ltd | Gedney | 2025 |
| Bulgaro Digital Ltd | London | 2018 |
| Bull&Bear Trading Ltd | Surbiton | 2025 |
| Bullclough Art School Limited | Ford | 2022 |
| Bullerengue Circle CIC | London | 2022 |
| Bullet Training Solutions Limited | Rotherham | 2017 |
| Bulletproof Actor Ltd | Mediacityuk | 2020 |
| Bulletproof Business Limited | Ilford | 2019 |
| Bulletproof Cycling Ltd | Poole | 2024 |
| Bulls and Bears Limited | Luton | 2023 |
| Bullseye Darts Academy Limited | South Shields | 2025 |
| Bullseye School of Motoring Ltd | Ashford | 2009 |
| Bullsfolio Limited | London | 2024 |
| Bullsgrow Ltd | Ruislip, | 2026 |
| Bullying Intervention Limited | Consett | 2011 |
| Bullying Recovery and Awareness CIC | Aberdeen | 2023 |
| Bulwark Training Ltd | Leicester | 2020 |
| Bumble BEE Nursery Schools Ltd | London | 2003 |
| Bumble Bees Day Nursery Ltd | London | 2005 |
| Bumble Bees Nursery (Blackburn) Limited | Blackburn | 2015 |
| Bumble Creatives CIC | Bicester | 2023 |
| Bumble-Bees Montessori (Grange Park) Ltd | London | 2010 |
| Bumblebees Community Nursery Ltd | St. Helens | 2006 |
| Bump Birth and Babies Limited | Crowthorne | 2013 |
| Bump Birth Baby Limited | Helensburgh | 2022 |
| Bump Sisters Limited | Walsall | 2026 |
| Bump to Cradle Ltd | Bristol | 2016 |
| BUMP2BABY&BEYOND Training Limited | London | 2021 |
| Bumps and Burns Ltd | Hereford | 2023 |
| Bumpsa-Daisies Nursery Ltd | Sutton | 2019 |
| Bumpy Limited | Birstall | 1989 |
| Bundle of Joy Ltd | High Wycombe | 2020 |
| Bundle of Rays UK Ltd | Buxton | 2026 |
| Bundles & Bloom CIC | London | 2025 |
| Bungalow Day Nursery Ltd | Stockport | 2008 |
| Bungay School of Motoring Limited | Beccles | 2012 |
| Bunhill Services Limited | Newcastle Upon Tyne | 2005 |
| Buniad Mawlana Ltd | Harrow | 2025 |
| Bunney & Thread Limited | London | 2023 |
| Bunnies Day Care Limited | Suffolk | 2005 |
| Bunnies Pre-School | London | 2016 |
| Bunny Park Nursery Ltd | Perivale | 2015 |
| Bunny Run Childcare Centre Limited | Hailsham | 2013 |
| Bunny Run Childcare Limited | Rochester | 2002 |
| Bunny Tales Day Nursery Limited | London | 2002 |
| Bunoosh Ltd | Loughborough | 2025 |
| Bunting and Bobbins Ltd | Rotherham | 2026 |
| Bunting Training Limited | Corsham | 2021 |
| Buntingford and Royston Football Coaching Ltd | Buntingford | 2025 |
| Buntingford School of Dance Limited | Buntingford | 2012 |
| Buntings Nursery Ltd | Thakeham | 2021 |
| Bunyadi Business Academy Ltd | London | 2025 |
| Bura Group Ltd | St. Helens | 2018 |
| Burbage Nature Preschool Ltd | Hinckley | 2024 |
| Burbage Preschool Ltd | Hinckley | 2020 |
| Burc Lanka Ltd | Ivybridge | 2023 |
| Burch First AID Ltd | Harlow | 2020 |
| Bureau for Further Studies Limited | London | 2012 |
| Bureau Ltd | Newcastle | 2021 |
| Burford Preschool C.I.C. | Tenbury Wells | 2012 |
| Burford School | Burford | 2012 |
| Burgeonton Academy Limited | Broadstairs | 2024 |
| Burgess (Consultancy) Limited | Pershore | 2011 |
| Burgess Hill School for Girls Company | Burgess Hill | 1934 |
| Burgher Consulting Ltd | London | 2010 |
| Burghill Community Academy | Hereford | 2013 |
| Burgos Fitness Limited | Birmingham | 2022 |
| Burian Ltd | Morden | 2017 |
| Burke Education and Mentoring CIC | Kilmarnock | 2018 |