| Bubu's Community Hub Limited | Great Baddow | 2023 |
| Bubugees Ltd | Swanscombe | 2019 |
| BUC Prestatyn Limited | Bolton | 2022 |
| BUC Wakefield Limited | Bolton | 2022 |
| Buchan + Associates Limited | Glasgow | 2002 |
| Buchan Braes Aesthetics Limited | Peterhead | 2018 |
| Buchan Community Farm | Peterhead | 2016 |
| Buchan Healthcare Limited | London | 2001 |
| Buchanan House Care Limited | Slough | 2019 |
| Buchanan Lodge Care Limited | Slough | 2019 |
| Buchanan Nursery Limited | Slough | 2019 |
| Buchanan Optometrists Ltd | Dover | 2008 |
| Buchanan Psychology Ltd | Honiton | 2025 |
| Buchanik Limited | Romford | 2015 |
| Buchealth Consulting Services Limited | Northampton | 2024 |
| Buchenhorst Ltd | St. Neots | 2021 |
| Buchi & Associates Ltd | Crewe | 2022 |
| Buchie Care Limited | Widnes | 2021 |
| Bucholie Ltd | Aberdeen | 2018 |
| Buciu Ltd | Gateshead | 2018 |
| Buckcroft Ltd | Solihull | 2023 |
| Buckenham Clinical Services Limited | Bolton | 2022 |
| Buckie Buddies Ltd | Buckie | 2026 |
| Buckingham (Bucks Opco) Limited | West Yorkshire | 2019 |
| Buckingham and Blackwood (UK) Ltd | Birmingham | 2012 |
| Buckingham Home Care Limited | Buckingham | 2014 |
| Buckingham Palace Care Ltd | London | 2022 |
| Buckingham Podiatry Limited | Buckingham | 2024 |
| Buckingham Radiology Ltd | Luton | 2023 |
| Buckingham Rise Private Limited | Coventry | 2018 |
| Buckinghamshire and East Berkshire Mind | High Wycombe | 2003 |
| Buckinghamshire Capacity and Care Ltd | London | 2026 |
| Buckinghamshire Hand Clinic Ltd | Harrow | 2012 |
| Buckinghamshire Healthcare Projects Limited | Amersham | 2017 |
| Buckinghamshire Medical Limited | Colchester | 2023 |
| Buckinghamshire Natural Health Ltd | Bucks | 2013 |
| Buckinghamshire Orthopaedic Surgery Limited | Darlington | 2020 |
| Buckinghamshire Psychology Limited | Hove | 2013 |
| Buckinghamshire Spinal Services Limited | Chesham | 2016 |
| Buckinghamshire Therapy Ltd | Chesham | 2026 |
| Buckinghamshire Upper Limb Solutions Ltd | Bedford | 2014 |
| Buckland Care Limited | Poole | 2002 |
| Buckland Care Services Limited | Poole | 2006 |
| Buckland Rest Homes Limited | Surrey | 2005 |
| Buckland View Management Company Limited | Lymington | 1988 |
| Buckle and Mcgrath Limited | Wirral | 2007 |
| Buckley & Bayliss-Chapman Ltd | Cheltenham | 2022 |
| Buckley Consultants Ltd | Beverley | 2017 |
| Buckley Health Consultancy Limited | Bath | 2016 |
| Buckley Medical Limited | Durham | 2022 |
| Buckley Whitmoor-Pryer Ltd | Bovey Tracey | 2023 |
| Buckley-Gray Consultancy Ltd | Newcastle | 2013 |
| Buckreddan Care Centre Limited | Kilwinning | 2004 |
| Bucks Care Ltd | Gerrards Cross | 2024 |
| Bucks Child Services Ltd | High Wycombe | 2020 |
| Bucks Chiropractic Ltd | Leighton Buzzard | 2011 |
| Bucks Consultancy Services Limited | Harrow | 2015 |
| Bucks Country Home Care Limited | Longwick | 2015 |
| Bucks Dental Hygienist Services Ltd | High Wycombe | 2022 |
| Bucks Digestive Wellbeing Ltd | London | 2023 |
| Bucks EYE Care Limited | High Wycombe | 2022 |
| Bucks EYE Surgery Ltd | Bucks | 2024 |
| Bucks Family Network Ltd | High Wycombe | 2021 |
| Bucks Foot Clinic Ltd | Amersham | 2017 |
| Bucks Frailty Care Consultancy Services Ltd | Aylesbury | 2025 |
| Bucks General Surgery Limited | Milton Keynes | 2012 |
| Bucks Happy Place CIC | Aylesbury | 2025 |
| Bucks Hyperbaric Therapy Ltd | London | 2024 |
| Bucks Medical Aviation Services Limited | Harrow | 2023 |
| Bucks Osteopathy Limited | Chesham | 2016 |
| Bucks Phys Limited | Tunbridge Wells | 2003 |
| Bucks Physio Ltd | London | 2022 |
| Bucks Psychiatry Ltd | Gerrards Cross | 2015 |
| Bucks Smart Care Ltd | High Wycombe | 2018 |
| Buckshaw Bunnies Childcare Ltd | Nottingham | 2014 |
| Buckspire Limited | London | 2025 |
| Bucksvision | Aylesbury | 2012 |
| Buczkowski Ltd | Isleworth | 2018 |
| BUD Nutrition Ltd | London | 2016 |
| BUD to Bloom Aesthetics Ltd | Coventry | 2022 |
| BUD to Bloom Weight Loss Limited | Coventry | 2024 |
| Budavi Health Limited | Reigate | 2023 |
| Budd Surgical Limited | Bristol | 2018 |
| Buddha Aesthetics Ltd | Canvey Island | 2023 |
| Buddha Balm Ltd | Liverpool | 2025 |
| Buddha Foundation | Welling | 2017 |
| Buddha Therapies Limited | Prescot | 2014 |
| Buddhas Hands Wellness Ltd | Plymouth | 2024 |
| Buddhist Association UK | London | 2022 |
| Buddhist Compassion Relief TZU CHI Foundation Limited | | 1994 |
| Buddhist Village Trust for SRI Lanka | Stanmore | 2003 |
| Buddi Bench Community Ltd | Tunbridge Wells | 2025 |
| Buddi Bench Limited | Tunbridge Wells | 2022 |
| Buddi Creatives Community Interest Company | Tunbridge Wells | 2025 |
| Buddies at Forsterpark Ltd | London | 2024 |
| Buddies Childtime Centre Ltd | Omagh | 2012 |
| Buddies Community Care Ltd | London | 2023 |
| Buddies Daycare Ltd | Dungannon | 2022 |
| Buddies for ALL CIC | London | 2021 |
| Buddies OUT of School Care Ltd | Mollington | 2024 |