| Brynawel House Alcohol and Drug Rehabilitation Centre Ltd. | Llanharan | 2006 |
| Brynderwen & Minster Medicals Limited | Cardiff | 2018 |
| Brynhaulog Limited | Newport | 2004 |
| Brynhyfryd Clinical and Consultancy Ltd | Burry Port | 2023 |
| Brynmar Ltd | Croydon | 2021 |
| Brynmawr Care Village Ltd | Pontprennau | 2007 |
| Brynmawr DC Ltd | Pontypridd | 2023 |
| Brynmawr Properties Ltd | Pontprennau | 2024 |
| Brynmed Limited | Warrington | 2008 |
| Brynmenyn Care Home Ltd | Cardiff Gate Business Park | 2025 |
| Brynmill Limited | Cowbridge | 2013 |
| Bryntirion Care Ltd | Bridgend | 2018 |
| Bryony Eccles Limited | Bexhill On Sea | 2023 |
| Bryony Walker Ltd | Ashford | 2025 |
| Bryseldphoenix Ltd | Manchester | 2018 |
| Bryseldphoenixaji Ltd | London | 2025 |
| Brysk Wellness and Recovery Ltd | Manchester | 2023 |
| Bryson Care | Belfast | 2011 |
| Bryson Charitable Group | Belfast | 1939 |
| Bryson House Ltd | Milton Keynes | 2018 |
| Bryt Oral Care Ltd | Birmingham | 2021 |
| Bryte Smile Limited | Stanmore | 2015 |
| Bryte Sunshine Limited | Wolverhampton | 2014 |
| Bryter Futures Consultancy Limited | Nantwich | 2014 |
| Bryter Solutions Limited | Huddersfield | 2020 |
| Brytespark Limited | Newark | 2009 |
| Brzudent Ltd | Peterborough | 2013 |
| BS Bhandal Limited | Leamington Spa | 2017 |
| BS Care Management Services Limited | Tilbury | 2017 |
| BS Care Providers Ltd | Nottingham | 2022 |
| BS Care Solutions Limited | Canterbury | 2015 |
| BS Clear Vision Limited | Derby | 2023 |
| BS Cosmetic Surgery Ltd | Leamington Spa | 2021 |
| BS Crump Ltd | Weston-Super-Mare | 2024 |
| BS Day One Support Services CIC | Leicester | 2019 |
| BS Healthcare Limited | Birmingham | 2014 |
| BS Healthcare Services Ltd | Manchester | 2025 |
| BS Kent Limited | Ellesmere Port | 2024 |
| BS Kent Services Ltd | Ellesmere Port | 2026 |
| BS Plastic Surgery Ltd | London | 2018 |
| Bs&W Limited | Croydon | 2018 |
| BS24 Limited | Camberley | 2009 |
| BS3 Community Development | Southville | 1990 |
| BS4A Limited | Poole | 2018 |
| BSA Care Limited | London | 2008 |
| BSA Dental Limited | Manchester | 2025 |
| Bsafe Care Ltd | Camberley | 2024 |
| BSB Better Together CIC | Bristol | 2024 |
| BSB Consultancy Ltd | Thornton Heath | 2022 |
| Bsbea Limited | Basildon | 2023 |
| BSC Care Services Ltd | Smethwick | 2020 |
| BSC Care Solutions Limited | London | 2025 |
| BSC Clinical Solutions Ltd | Leamington Spa | 2017 |
| BSC KKS Ltd. | Sutton Coldfield | 2021 |
| BSC Medicines Consultancy Limited | Coventry | 2020 |
| BSD Child Care Ltd | London | 2024 |
| Bsdp Limited | Leighton Buzzard | 2025 |
| BSE Health Limited | Corby | 2022 |
| BSE PVT Limited | Waterlooville | 2024 |
| BSF Midlands Ltd | Warwick | 2023 |
| BSG Medical Services Ltd | Leicester | 2016 |
| Bsgeorge Locum Services Ltd | Morden | 2022 |
| BSH Healthcare Limited | Pinner | 2023 |
| BSH Upminster Ltd | Woodford Green | 2022 |
| Bshah Ltd | Leicester | 2026 |
| Bshapes Limited | Manchester | 2025 |
| Bshatta Limited | Stowmarket | 2016 |
| Bsht Meetings Limited | Manchester | 2002 |
| BSI Dental Limited | York | 2022 |
| BSI Healthcare Limited | Smethwick | 2015 |
| Bsid Ltd | Essex | 2018 |
| Bsio C.I.C. | Midhurst | 2013 |
| Bsipp Limited | Brentwood | 2020 |
| BSJ Healthcare Limited | Leicester | 2013 |
| BSJ Healthcare Professionals Limited | Rochester | 2015 |
| BSJ Smiles Ltd | Leicester | 2026 |
| BSK Care (UK) Ltd | Chigwell | 2020 |
| BSK Global Services Ltd | London | 2019 |
| BSK Optical Services Ltd | Bury | 2022 |
| BSK Orthodontics Limited | Bolton | 2024 |
| BSL at Work Ltd | Bromley | 2023 |
| BSL Care Services Ltd | Harrow | 2025 |
| BSL Interpreting Solutions Ltd | Liverpool | 2014 |
| BSL Medical Services Limited | Newcastle Upon Tyne | 2015 |
| BSM Medical Limited | London | 2013 |
| BSM Medical Services Ltd | Belfast | 2026 |
| BSM Projects Limited | Virginia Water | 2024 |
| BSM Social Care Limited | Sunderland | 2016 |
| Bsmg Fremont Healthcare Ltd | Yeovil | 2026 |
| Bsmuk Ltd | Ipswich | 2020 |
| BSN Nursery Management Limited | Leicestershire | 2001 |
| BSN Smiles Ltd | Isleworth | 2021 |
| BSN Social Care Ltd | Harrow | 2014 |
| Bsomp Southampton 2025 Ltd | Southampton | 2024 |
| BSP Health Ltd | Nottingham | 2017 |
| Bspg Laboratories Limited | Sandwich | 2014 |
| Bspoke Therapy Practice Ltd | Lochgelly | 2026 |
| Bsquare Care Agency Limited | Enfield | 2018 |
| Bsquare Care Provision and Services Ltd | Colchester | 2024 |
| BSR Care Ltd | Ilford | 2024 |