| Bryburn Investments Ltd | Portsmouth | 2025 |
| Bryce & JJM Limited | Coventry | 2023 |
| Bryce Ainsley Associates Limited | Perth | 2020 |
| Bryce Surveying Limited | Banchory | 2021 |
| Bryce Trading Ltd | Milton Keynes | 2022 |
| Bryce White & Company Limited | London | 2010 |
| Bryco Holdings Limited | Daventry | 2022 |
| Brydell F Ltd | Croydon | 2017 |
| Bryden Associates Limited | Glasgow | 1999 |
| Bryden Holdings Limited | Glasgow | 2025 |
| Brydg Alpha Ventures Limited | London | 2021 |
| Brydg Capital Ltd | London | 2014 |
| Brydg Finance NO.1 Limited | London | 2017 |
| Brydg Finance NO.2 Limited | London | 2020 |
| Brydon Financials Limited | Colchester | 2015 |
| Bryen & Langley (Holdings) Ltd | Orpington | 2017 |
| Bryen & Langley Trustee Limited | Orpington | 2025 |
| Bryher Boatyard Holdings Limited | Weymouth | 2021 |
| Bryherson | Reigate | 2021 |
| Bryland (Holdings) Limited | Brierley Hill | 2017 |
| Bryland Fire Holdings Limited | Leicester | 2024 |
| Bryland International Property Ltd | London | 2019 |
| Bryley Holdings Ltd | Bristol | 2025 |
| Bryley Investments Ltd | Bristol | 2025 |
| Brymau 3 Saltney NO.2 Ltd | Prestwich, Manchester | 2020 |
| Brymau 4 Saltney Ltd | Prestwich, Manchester | 2020 |
| Brymau 4 Saltney NO.2 Ltd | Prestwich, Manchester | 2020 |
| Brymor Group Holdings Limited | Winchester | 2022 |
| Brymore Family Holdings Ltd | Hove | 2018 |
| Brymore Organisation Ltd | Hove | 2018 |
| Bryn Afon Limited | Chester | 2022 |
| Bryn Capital Limited | Wednesbury | 2024 |
| Bryn Investments Limited | Pontypridd | 2021 |
| Bryn SM Holding CYF | Corwen | 2026 |
| Brynacres Leisure Limited | Tywyn | 2022 |
| Brynbella Investments Limited | St Asaph | 2021 |
| Bryncarlen Limited | Swansea | 2018 |
| Bryncelyn Holdings Ltd | Sandiway | 2025 |
| Brynfuwch CYF | Llanelli | 1979 |
| Bryngelli Ltd | Swansea | 2015 |
| Brynglas Limited | Cwmbran | 2015 |
| Bryngranod Contracting Limited | Llanybydder | 2026 |
| Brynholm Capital Limited | Pool In Wharfedale | 2012 |
| Bryni UK Limited | London | 2009 |
| Bryntirion Properties Limited | London | 2021 |
| Bryon Ltd | Poole | 2021 |
| Bryony Herrod-Taylor Limited | Taunton | 2022 |
| Bryonze Consultants Limited | Dunmow | 2013 |
| Bryson Group Holdings Limited | Coulsdon | 2026 |
| Bryson Plant Hire Limited | Bristol | 2010 |
| Bryta Investments Limited | Warwick | 2022 |
| Bryter Holdings Ltd | Birmingham | 2019 |
| Bryum Capital Ltd | London | 2004 |
| BRZ AS Limited | Lisburn | 2025 |
| BRZ BS Limited | Lisburn | 2025 |
| BRZ CRZ Limited | Lisburn | 2025 |
| BRZ GP Limited | Lisburn | 2025 |
| BRZ Morrison Holdings Ltd | Paisley | 2025 |
| BRZ RS Limited | Lisburn | 2025 |
| Brzeski Somboonrat Holdings Limited | London | 2026 |
| Brzozowski Holdings Ltd | Jarrow | 2025 |
| BS 1 Sauna Ltd | Cardiff | 2015 |
| BS Autos Management Limited | London | 2022 |
| BS Climate LT Bidco UK Limited | London | 2022 |
| BS Climate LT Holdings UK Limited | London | 2022 |
| BS ES Holdings Limited | Ashby-De-La-Zouch | 2020 |
| BS Group Holdings Ltd | Bradford | 2023 |
| BS INT Holdings Limited | Ashby-De-La-Zouch | 2020 |
| BS Inventories Ltd. | London | 2025 |
| BS Prop Co Ltd | Swansea | 2022 |
| BS Scaffolding Group Ltd | Middlesbrough | 2023 |
| BS Scaffolding Land Ltd | Middlesbrough | 2024 |
| BS Securities Limited | Leeds | 2021 |
| BS US Holdings Limited | Ashby-De-La-Zouch | 2020 |
| BS WH Holdings Limited | Ashby-De-La-Zouch | 2020 |
| Bs&A Satellite E Limited | Skipton | 2024 |
| Bs&A Satellite K Limited | Skipton | 2024 |
| Bs&A Satellite M Limited | Skipton | 2024 |
| Bs&A Satellite P Limited | Skipton | 2024 |
| Bs&T Holdings Ltd | Solihull | 2021 |
| BS1 J Venue Limited | Bristol | 2020 |
| BS4444 Limited | Leicester | 2024 |
| BS4C Finance Limited | Manchester | 2022 |
| BS7 Investments Limited | London | 2020 |
| BS8 Holdings Ltd | Bristol | 2023 |
| BSA (91) Limited | London | 2026 |
| BSA Pension Trustees Limited | London | 2011 |
| BSA Services Ltd | Cheltenham | 2016 |
| Bsal Trading Limited | Burnley | 2017 |
| Bsawhney Holdings Ltd | Norwich | 2015 |
| BSB Financial Services Limited | Leamington Spa | 2014 |
| BSB Group Holdings Ltd | Harpenden | 2025 |
| BSB Mortgage Advisors Limited | Bishops Cleeve | 2019 |
| Bsbb Holdings Ltd | Manchester | 2024 |
| BSC Financial Services Ltd | Gateshead | 2017 |
| BSC Holdco Limited | London | 2024 |
| BSC Holdings Group Limited | Borehamwood | 2025 |
| BSC Property Group Ltd | Warrington | 2025 |
| BSC Trading Limited | London | 2001 |
| Bsch Master III SUB (Vol-Mgr) Ltd | London | 2024 |