| Bryden Johnson Digital Limited | Croydon | 1978 |
| Bryden Management Services Limited | Perthshire | 2000 |
| Bryghtino Computer Consulting Limited | Birmingham | 2015 |
| Brymark Concrete Structures Limited | Falkirk | 2019 |
| Brymbo Developments Limited | Newport | 1968 |
| Bryn Daniel Hair Company Limited | Oldham | 2003 |
| Bryn Difyr Ltd | Mold | 2022 |
| Bryn Hafod House Management Company Ltd | Chipping Campden | 2017 |
| Bryn Masonic Hall Limited | Wigan | 2025 |
| Brynel Estate Planning Ltd | Wednesbury | 2018 |
| Brynemore Cleaning Ltd | Leicester | 2019 |
| Brynhoffnant Business Limited | Llandysul | 2018 |
| Brynmawr Nails Limited | Ebbw Vale | 2024 |
| Brynna Domestic Appliances Ltd | Brynna | 2018 |
| Brynrhyd Solar Farm Limited | Warrington | 2019 |
| Brynteg Services Ltd | Llanelli | 2025 |
| Bryntirion Associates Ltd | Mold | 2018 |
| Brynwhitmorehair Ltd | Gloucester | 2024 |
| Brynymor Barbers Ltd | Swansea | 2023 |
| Bryony Alexandra Limited | Prestonpans | 2019 |
| Bryony House Limited | Birmingham | 1955 |
| Bryony Jones Limited | London | 2014 |
| Bryony Quate Edinburgh Ltd | Edinburgh | 2019 |
| Bryony Quate Hairdressing Ltd | Edinburgh | 2018 |
| Bryony's Beauty Limited | Thatcham | 2014 |
| Bryonyhill Cat Grooming Services Ltd | Swindon | 2025 |
| Bryson & Hare Limited | Kirkcaldy | 2022 |
| Bryson GAS Ltd | Harlow | 2018 |
| Bryson Loxley Limited | Wirral | 2010 |
| Bryval Co Limited | London | 2013 |
| Bràigh MÒR Teaghlach Uasal Oighreachdan, Seilbh & Togalaichean Aveyron Limited | Edinburgh | 2025 |
| Bràigh MÒR Uasal Seilbh & Togalaichean Limited | Edinburgh | 2025 |
| Brîg Barbers Limited | Denbigh | 2025 |
| BS 2 Limited | Edinburgh | 2024 |
| BS Fitness Ltd | Gerrards Cross | 2016 |
| BS Glam Ltd | Rugby | 2024 |
| BS Lancaster Limited | Chorley | 2016 |
| BS Laundry Services Ltd | Bradford | 2023 |
| BS Local Ltd | Southampton | 2025 |
| BS Members Club Limited | St. Ives | 2021 |
| BS Metering - Pools Team Limited | Leigh-On-Sea | 2025 |
| BS Midlands Trading Limited | Birmingham | 2016 |
| BS Swan Investment Limited | Newcastle | 2010 |
| BS Unique Solutions Ltd | Stoke-On-Trent | 2018 |
| BS Welding & Engineering Inspection Services Limited | Greenock | 2019 |
| BS West London Limited | London | 2013 |
| BS West Midlands Limited | Birmingham | 2020 |
| BS0 at 51 Lounge Limited | London | 2026 |
| BS0 Group Holdings Limited | London | 2026 |
| BS1 Barbershop Ltd | Kingswinford | 2017 |
| BS21 CUT Limited | Tunbridge Wells | 2024 |
| BS4 Barbershop Ltd | Kingswinford | 2017 |
| BS6 Barbers Ltd | Bristol | 2025 |
| BS8 Barbers Ltd | Bristol | 2026 |
| BSA Cycles Ltd | Worcester | 2019 |
| BSA Design & Service Limited | Whalley | 2020 |
| BSA Heritage Limited | Abingdon | 2011 |
| BSA IT Consulting Ltd | Westcliff-On-Sea | 2015 |
| BSA Management & Consulting Limited | Addlestone | 2006 |
| BSA Motorbikes Ltd | Worcester | 2019 |
| BSA UK Association | Surbiton | 2012 |
| Bsafety Ltd | London | 2019 |
| Bsap Regimental Association United Kingdom Branch | Harlow | 2019 |
| BSB & Sons Ltd | Manchester | 2026 |
| BSB Barber Ltd | Edinburgh | 2025 |
| BSB FX Trading Ltd | Wolverhampton | 2024 |
| BSB Hair Ltd | Swansea | 2023 |
| BSB Petroleum Limited | Kirkcaldy | 2019 |
| BSB Refinishing Limited | Plymouth | 2017 |
| BSC Developments Limited | Birmingham | 1992 |
| BSC Engineering Ltd | Gainsborough | 2018 |
| BSC FIN Limited | Nottingham | 2022 |
| Bsce Ltd | Bradford | 2024 |
| Bschip CIC | Rayleigh | 2024 |
| BSD (CB) Ltd | Salford | 2019 |
| BSD Welding Services Limited | Blackpool | 2016 |
| BSE Bidco (Events) Limited | Bury St Edmunds | 2017 |
| BSE Bidco Limited | Bury St Edmunds | 2015 |
| BSE Locums Ltd | Manchester | 2022 |
| BSG Imex Limited | Elgin | 2018 |
| Bsgk Excellent Premium Ventures Limited | Enfield | 2023 |
| BSH Services Limited | London | 2020 |
| BSI Assurance UK Limited | London | 2011 |
| BSI Group Limited | Manchester | 1995 |
| BSI Professional Services Emea Limited | London | 2011 |
| BSI Standards Limited | London | 2011 |
| BSI Trading Limited | London | 2016 |
| Bskw Ltd | Liverpool | 2019 |
| BSL Express Service Limited | Brecon | 1976 |
| BSL Interpreting Services Ltd | Llandudno Junction | 2011 |
| BSL Investment Limited | London | 2005 |
| BSL Olive Tree Group (Church) Limited | Stourbridge | 2022 |
| BSL Services Ltd | London | 2019 |
| BSL Support Ltd | London | 2011 |
| Bsl.Tanning Ltd | London | 2023 |
| BSL02.TANNING Ltd | London | 2024 |
| Bslayedit Ltd | London | 2023 |
| BSM Invest Ltd | London | 2013 |
| Bsmr Limited | Reading | 2014 |
| BSN UK Limited | Edgware | 2023 |