| Boxtop Properties Limited | Sevenoaks | 2002 |
| Boxtrot Limited | London | 2016 |
| Boxwell Holdings Limited | Torquay | 2024 |
| Boxwood Advisory Ltd | London | 2026 |
| Boxwood Productions Ltd | Chippenham | 2024 |
| Boxwood Topco Limited | Towcester | 2026 |
| Boxworth Services Limited | Cambridge | 2002 |
| Boxworx Group Limited | Perth | 2024 |
| Boxx Industries Limited | Kettering | 2022 |
| Boxx Interiors Limited | Southampton, | 2023 |
| BOXX2BOXX Limited | Manchester | 2026 |
| Boxxe GP | York | 2024 |
| Boxxe Group Limited | York, | 2018 |
| Boxxe Investments | York | 2024 |
| Boxxen Group Limited | Brigg | 2026 |
| Boxy & White Limited | Weston-Super-Mare | 2024 |
| BOY London Holdings Ltd | London | 2020 |
| Boyak Advisors Ltd | London | 2022 |
| Boyata Limited | Hamilton | 2025 |
| Boyce Holdings Limited | Southend On Sea | 2022 |
| Boyce's Holdings Limited | Bristol | 2026 |
| Boyd & Company Limited | Glasgow | 1995 |
| Boyd Financial Solutions Ltd | Dalkeith | 2025 |
| Boyd Morison Risk Management Ltd. | Colchester | 1996 |
| Boyd Wallis Consulting Limited | Bournemouth | 2016 |
| Boyd Wallis Holdings Limited | Bournemouth | 2021 |
| Boyd Wallis Limited | Bournemouth | 2016 |
| Boyd Wallis Opco Limited | Bournemouth | 2023 |
| Boydell Holdings Limited | Stowmarket | 2022 |
| Boyden Investments Limited | Croydon | 2015 |
| Boyd’S Freight Services Limited | Sheffield | 2022 |
| Boye Consultancy Limited | Southport | 2015 |
| Boyer Audio Limited | Horsham | 2016 |
| Boyett & Co Holdings Limited | Witney | 2025 |
| Boyinas Holdings Ltd | Wellingborough | 2023 |
| Boyle Contracting Group Limited | Fareham | 2016 |
| Boyle Fintech Ltd | Shoreham-By-Sea | 2023 |
| Boyle Group Industries Limited | Leeds | 2024 |
| Boypal Limited | Manchester | 2014 |
| Boys and Boden Holdings Limited | Welshpool | 2025 |
| Boyson Holdings Ltd | London | 2021 |
| Boyton Holdings Limited | Manchester | 2017 |
| Bozcoandsonsas Limited | Derby | 2024 |
| Bozkurt Trading Ltd | London | 2023 |
| Bozzino Capital, Ltd | London | 2026 |
| BP & Daughters Limited | Newcastle Upon Tyne | 2024 |
| BP Agencies Limited | Loughton | 2023 |
| BP Australia Swaps Management Limited | Sunbury On Thames | 2012 |
| BP Bear Holdings Ltd | Rainham | 2022 |
| BP Benevolent Fund Trustees Limited | Middlesex | 1948 |
| BP Builds Ltd | Gloucester | 2019 |
| BP Capital Investments Ltd | Birmingham | 2025 |
| BP Capital Markets P.L.C. | Middlesex | 1976 |
| BP Car Fleet Limited | Liverpool | 1960 |
| BP Ccus UK Ltd | Sunbury On Thames | 2020 |
| BP Ccus UK NEP Limited | Middlesex | 2023 |
| BP ETA Holdings Limited | Sunbury On Thames | 2023 |
| BP Finance P.L.C | Middlesex | 2001 |
| BP Financial Ltd | Chester-Le-Street | 2017 |
| BP Gamma Holdings Limited | Middlesex | 2023 |
| BP Group Limited | Maldon | 2017 |
| BP Holding Solutions Ltd | Croydon | 2025 |
| BP Holdings (24) Limited | Fleet | 2024 |
| BP Integrated Solutions Limited | Middlesex | 2021 |
| BP INV6 Bidco Limited | Cardiff | 2023 |
| BP INV6 New Bidco Limited | London | 2025 |
| BP INV6 New Pledgeco Limited | London | 2025 |
| BP INV8 Holdco Ltd | London | 2025 |
| BP INV8 Midco Ltd | London | 2025 |
| BP Investments Ltd | Leicester | 2026 |
| BP Iota Holdings Limited | Sunbury On Thames | 2023 |
| BP Kappa Holdings Limited | Sunbury On Thames | 2023 |
| BP Lambda Holdings Limited | Sunbury On Thames | 2023 |
| BP Mauritania Investments Limited | Sunbury On Thames | 2016 |
| BP Motion Holdings Limited | Middlesex | 2025 |
| BP NZT Power Holdings Limited | Middlesex | 2023 |
| BP Oman H2 Limited | Sunbury On Thames | 2024 |
| BP Pension Escrow Limited | Sunbury On Thames | 2019 |
| BP Pension Trustees Limited | Middlesex | 1928 |
| BP Pensions Limited | Middlesex | 1977 |
| BP Retail Properties Limited | Middlesex | 2020 |
| BP Rolls Group Limited | Andover | 2001 |
| BP Rolls Holdings Limited | Hampshire | 2014 |
| BP Secretaries Limited | Sunbury On Thames | 2023 |
| BP Theta Holdings Limited | Sunbury On Thames | 2023 |
| BP Wealth Management Limited | Horsham | 2015 |
| BP Zeta Holdings Limited | Sunbury On Thames | 2023 |
| BP05 Limited | Preston | 2024 |
| BPA Capital Investments Ltd | London | 2021 |
| Bpayd Ltd | London | 2023 |
| BPB Finance (NO. 4) Limited | Leicestershire | 2002 |
| BPB Group Limited | Milton Keynes | 2024 |
| BPB India Limited | Leicestershire | 1960 |
| BPB UW Management Limited | Whetstone | 2018 |
| BPB Ventures Limited | Whetstone | 2018 |
| BPC Interiors Holdings Limited | Woodford Green | 2017 |
| BPC Ventures Limited | London | 2019 |
| BPC Wealth Management Limited | Leicester | 2016 |
| Bpce Equipment Solutions UK (December) Limited | Richmond | 1980 |
| Bpce Equipment Solutions UK Limited | Richmond | 1998 |