| Burwood Care Limited | Broadstone | 2010 |
| Bury Cabaret Lunch Club CIC | Manchester | 2021 |
| Bury Chiropractic Limited | Bury | 2006 |
| Bury EYE Care Ltd | Ramsbottom | 2015 |
| Bury Foot Clinic Limited | Bury | 2018 |
| Bury GP Practices Limited | Bury | 2012 |
| Bury Hearing Centre Ltd | Bury | 2019 |
| Bury Home Care Limited | Bury | 2019 |
| Bury Hospice | Bury | 2010 |
| Bury Smile Line Limited | Penrith | 2015 |
| Bury Society for Blind and Partially Sighted People | Bury | 2003 |
| Bury ST Edmunds Osteopaths Limited | Stowmarket | 2008 |
| Bury ST. Edmunds Women's AID Centre Limited | Bury St. Edmunds | 1977 |
| BURY2GETHER CIC | Sutton | 2022 |
| Buryfield Care Services Ltd | Birmingham | 2025 |
| Buryild | Kay Street, Bury | 1994 |
| BUS Stop Drop-In & Counselling Limited | Milton Keynes | 2011 |
| Busby House Dental Centre Limited | Harrow | 2010 |
| Buschcraft Forces Ltd | London | 2026 |
| Bush & Company Rehabilitation Limited | Kettering | 2010 |
| Bush Assessment and Analysis Ltd | Ruthin | 2024 |
| Bush Home Limited | Birmingham | 2012 |
| Bush House Care Ltd | Harrow | 2023 |
| Bush House Osteopathic Practice Limited | Monmouth | 2003 |
| Bush House Pembroke Limited | Pembroke | 2008 |
| Bush House West Wales Limited | Pembroke | 2008 |
| Bushby Care Ltd | Brighton | 2004 |
| Bushby Lodge Medical Ltd | Leicester. | 2013 |
| Bushey Osteopathic Clinic Ltd | Watford | 2004 |
| Bushmed Ltd | Accrington | 2015 |
| Bushra & SON Ltd | Sheffield | 2022 |
| Bushra Browj Ltd | Accrington | 2023 |
| Bushra Care Company Limited | Hatfield | 2024 |
| Bushra Consultancy Ltd | Sheffield | 2024 |
| Bushu Ltd | Coventry | 2015 |
| Busi Xoli Limited | Mansfield | 2017 |
| Business Across Borders Ltd | York | 2015 |
| Business and Health Consultancy Limited | London | 2005 |
| Business and Human Rights Resource Centre | London | 2002 |
| Business Disability Forum | London | 1991 |
| Business for Health CIC | Wandsworth | 2020 |
| Business Health Partners Limited | Stockton On Tees | 2011 |
| Business LRY Ltd | Swindon | 2018 |
| Business Mastery Limited | Coventry | 2023 |
| Business Performance Therapy Limited | Colchester | 2024 |
| Business Psychology in Practice Ltd | Hassocks | 2004 |
| Business-Angels-Innovations Limited | Manchester | 2018 |
| Buskajus Services Limited | Sittingbourne | 2015 |
| Busoga Trust(The) | London | 1983 |
| Busolami's Heritage Limited | Manchester | 2022 |
| Busra Dental Limited | South Croydon | 2023 |
| Bussybamy.A.J Ltd | Rochester | 2013 |
| Bussysuper Ltd | Welling | 2021 |
| Buswell Associates Ltd | Bolton | 2013 |
| Busy Bears Nursery Limited | Birmingham | 2018 |
| Busy BEE (Fleetwood) Limited | Lancashire | 2006 |
| Busy BEE Healthcare Ltd | Barking | 2015 |
| Busy Bee's Nursery Limited | Muthill | 2019 |
| Busy Bees (Mill Hill) Limited | London | 2006 |
| Busy Bees Bourne Ltd | Bourne | 2012 |
| Busy Bees Care Limited | Falkirk | 2013 |
| Busy Bees Childcare Limited | Morden | 2024 |
| Busy Bees Childminding Ltd | Bournemouth | 2025 |
| Busy Bees Children Services Ltd | Dagenham | 2024 |
| Busy Bees Christian Pre-School Nursery Limited | Chigwell | 2019 |
| Busy Bodies Child Care Centre Limited | London | 2018 |
| Busy Bodies Childcare Limited | Nottingham | 2022 |
| Busy Buddies Daycare Ltd | Weston-Super-Mare | 2019 |
| Busy Bunnies Braybrook Ltd | Peterborough | 2022 |
| Busy Bunnies Day Nursery Limited | Stockport | 2012 |
| Busy DAD Crew Ltd | Newtownabbey | 2024 |
| Busy Diamonds Nursery Limited | Mitcham | 2019 |
| Busy Doctors Ltd | Hornchurch | 2013 |
| Busy Little Bees Nursery (Knowle) Ltd | London | 2024 |
| Busy Little Bees Nursery (Shirley) Limited | Solihull | 2006 |
| Busy Little Hands Ltd | North Ferriby | 2022 |
| Busy Lizzie Home Care Limited | Bath | 2020 |
| Busy Minds Coaching Ltd | London | 2024 |
| Busy Minds Hub Community Interest Company | Cranleigh | 2024 |
| Busy Minds Montessori Ltd | Croydon | 2025 |
| Busy Nought to Fives Limited | Gayton | 2001 |
| Busybee Care Limited | London | 2022 |
| Busybee Pursuits Ltd | Colchester | 2016 |
| Busyladies Ltd | Doncaster | 2020 |
| Busylizzy Esher Limited | Ashtead | 2019 |
| BUT ARE YOU Listening? Limited | Orpington | 2025 |
| Butacare Limited | Manchester | 2014 |
| Butama Ltd | Newcastle Upon Tyne | 2025 |
| Butau Ltd | Solihull | 2014 |
| Butdeen Ltd | Alexandria | 2025 |
| Bute Dental Care Limited | Isle Of Bute | 2024 |
| Bute House Surgery Limited | Hailsham | 2023 |
| Butel Pathology Limited | Stowmarket | 2021 |
| Buthelezi Limited | Woking | 2011 |
| Butho Limited | Leeds | 2013 |
| Butlamb Health Ltd | Manchester | 2017 |
| Butler & Finnigan Dental Practice (B.C .) Ltd | Birmingham | 2013 |
| Butler & Finnigan Dental Practice Ltd | Kearsley | 2013 |
| Butler Cardiology Limited | Wilmslow | 2016 |
| Butler Healthcare Support Ltd | Tonbridge | 2025 |