| Bioacoustic Health & Biology Research Ltd | London | 2026 |
| Bioaxis Healthcare Ltd | London | 2014 |
| Bioblood Ltd | London | 2025 |
| Biocentre Limited | West Hampstead | 1999 |
| Biocharged Ltd | Surrey | 2024 |
| Biocheck Health Limited | London | 2025 |
| Biochris Medical Ltd | Erith | 2011 |
| Biocura Healthcare Group Limited | Evesham | 2024 |
| Biodent-Uk Limited | Hornchurch | 2025 |
| Biodentculture Limited | London | 2024 |
| Biodock Limited | Nottingham | 2020 |
| Biodolf Limited | Leeds | 2021 |
| Bioelectric Baby Limited | Billericay | 2025 |
| Biofit Health Ltd | Thaxted | 2025 |
| Biogenix Ltd | London | 2025 |
| Biogroup Laboratory Limited | London | 2020 |
| Bioguinea Foundation | London | 2011 |
| Biohacking Manchester Limited | Manchester | 2022 |
| Biohackme Ltd | Loughborough | 2026 |
| Biohealth Community CIC | London | 2023 |
| Biohybrid Restorative Limited | Enfield | 2024 |
| Bioid Hormones Limited | Manchester | 2018 |
| Bioidentical Hormone Therapy Ltd | Cheltenham | 2021 |
| Bioindustry Association | London | 1985 |
| Biointeligent Ltd | Cardiff | 2025 |
| Biolife Diagnostics Ltd | London | 2021 |
| Biologic Care Ltd | Leighton Buzzard | 2026 |
| Biological Dentistry Limited | Kendal | 2020 |
| Biological Testing Ltd | London | 2025 |
| Biologicssupplements Ltd | London | 2026 |
| Biology Healthcare Limited | Crawley | 2019 |
| Biology of Balance Ltd | Enfield | 2026 |
| Bioluminux Ltd | Milton Keynes | 2021 |
| Bioluminux Wolverhampton Ltd | Wolverhampton | 2024 |
| Bioma Health Ltd | Bristol | 2022 |
| Bioma Ltd | Erith | 2022 |
| Bioman Materials Consultants Ltd | Heaton Mersey | 2018 |
| Biome Fit Limited | Wilmslow | 2021 |
| Biome Health and Performance Limited | Shipley | 2018 |
| Biome Health Club Ltd | London | 2021 |
| Biome Medical Ltd | London | 2019 |
| Biomechanics Education Ltd | Fareham | 2013 |
| Biomechanix Bodyworks Limited | Ipswich | 2024 |
| Biomechanix Clinic Ltd | Coventry | 2016 |
| Biomechanix Limited | Coventry | 2018 |
| Biomed Clinics Ltd | Carnforth | 2022 |
| Biomed Laboratory Limited | Milton Keynes | 2022 |
| Biomed Technologies Limited | London | 2023 |
| Biomedge Ltd | Sheffield | 2025 |
| Biomedic Limited | London | 1999 |
| Biomedical Clinics Limited | Banchory | 2008 |
| Biomedical Consulting Limited | Nottingham | 2019 |
| Biomedical Systems Limited | Carryduff | 2011 |
| Biomend Ltd | Doncaster | 2026 |
| Biomenses Ltd | London | 2025 |
| Biomet UK Healthcare Limited | Bridgend | 2009 |
| Biomimetic Academy Limited | Cullompton | 2025 |
| Biomotion London Limited | London | 2025 |
| Bionetics Ltd | Fincham | 2004 |
| Bioniq Health-Tech Solutions Limited | London | 2019 |
| Bioniq LAB Limited | Farnborough | 2020 |
| Bionol Hair Limited | Bath | 2026 |
| Bionourish Limited | York | 2020 |
| Bionubs Health Services Limited | Barking | 2009 |
| Bionura Limited | Gloucester | 2026 |
| Bioone UK Ltd | Southall | 2007 |
| Biop AI Limited | London | 2026 |
| Bioparametrics Limited | Dunfermline | 2001 |
| Biophysical Therapy Ltd | Paddington | 2020 |
| Biopsychosocial Limited | Westerham | 2006 |
| Biord Ltd | Bebington | 2017 |
| Bioreproduction Limited | Chesham | 2010 |
| Biores 96 Limited | Sutton Coldfield | 2022 |
| Bioresolve Limited | Bromley | 2014 |
| Bioresonance Limited | Leeds | 2018 |
| Biorevitalisation Ltd | Kington | 2018 |
| Biorhythmic Synchrony Ltd | Horsham | 2023 |
| Biorosary UK Medical Investment Limited | Croydon | 2020 |
| Bios Healing Therapies Limited | Richmond | 2018 |
| Biosa Limited | Thetford | 2003 |
| Biosa Services Limited | London | 2020 |
| Biosatmya Ltd | Colchester | 2025 |
| Bioscience Services (UK) Limited | Kent | 1997 |
| Bioscope Diagnostics Ltd | Glasgow | 2017 |
| Biosense Medical Supplies Limited | Chelmsford | 2021 |
| Biosentrix Limited | London | 2025 |
| Biosláinte Ltd | Glasgow | 2024 |
| Biosparx Ltd | Liverpool | 2026 |
| Biospectrum Limited | Newark | 2017 |
| Biosphere Expeditions Limited | Norwich | 2000 |
| Biosportart Limited | Royal Arsenal | 2019 |
| Biosysco Holdings Limited | Cobham | 2003 |
| Bioteq Limited | Winchester | 2016 |
| Biotherapy Ltd | Potters Bar | 2023 |
| Biotic Health Clinical Nutrition Ltd | Barnstaple | 2021 |
| Biotics Limited | London | 2023 |
| Biotrackr Pro Limited | Rochester | 2025 |
| Biotrex Ltd | Birmingham | 2025 |
| Biotrial International Limited | London | 1999 |
| Biotube Limited | Romford | 2008 |