| BMS R3 Limited | Cheltenham | 2020 |
| BMS Secondbody Ltd | Weybridge | 2025 |
| BMS Solutions Holdings Limited | Norwich | 2022 |
| BMS UN Limited | London | 2018 |
| BMS US Holdings Limited | London | 2021 |
| Bms-Bulk Meter Services Group Ltd | Redhill | 2022 |
| Bmsix Capital Ltd | London | 2021 |
| Bmsm Group Limited | Hove | 2025 |
| BMT Group (GY) Limited | Great Yarmouth | 2022 |
| BMT Healthcare North Holdings Limited | Manchester | 2018 |
| BMT Healthcare South Holdings Limited | Manchester | 2018 |
| Bmtr Group Ltd | Holt | 2026 |
| Bmtr Holdings Limited | Birmingham | 2020 |
| Bmtr Limited | Birmingham | 2017 |
| BMU Holdings Ltd | Croydon | 2019 |
| BMV Finance Ltd | Hayes | 2018 |
| BMV London Ltd | Bristol | 2025 |
| BMW (UK) Pensions Services Limited | Farnborough | 1982 |
| BMW Financial Services (GB) Limited | Farnborough | 1976 |
| BMX Information Systems (U.K.) Limited | Milton Keynes | 1982 |
| BMZ Holdings Limited | Morden | 2025 |
| BMZ Limited | Southampton | 2015 |
| BN Bennanti Ltd. | London | 2018 |
| Bn-Eweka Limited | Wokingham | 2016 |
| BN23 Investments Ltd | Northampton | 2022 |
| BN25 Ltd | Horndean, Waterlooville | 2025 |
| BN3 Asset Management Limited | Brighton | 2017 |
| BNA Holdings Limited | Liverpool | 2020 |
| BNB Finance Limited | Liss | 2025 |
| BNC 83/84/85 Ltd | Derby | 2015 |
| BNC Ltd | London | 2018 |
| BNF Capital Limited | London | 2013 |
| BNF Hospitality Limited | London | 2023 |
| BNF Orion Limited | London | 2013 |
| BNF Resources (UK) Limited | London | 2021 |
| BNI Compare Ltd | Ballyclare | 2024 |
| BNK Holdco Limited | Cambridge | 2025 |
| BNK Holding UK Ltd | London | 2025 |
| Bnking Ltd | London | 2023 |
| BNM Builders Group Ltd | Ilford | 2024 |
| Bnmnfed Limited | Corby | 2024 |
| BNO Investment Limited | Romford | 2021 |
| BNP Finnest Holdings Ltd | Edinburgh | 2023 |
| BNP Paribas Asset Management Services Limited | London | 1999 |
| BNP Paribas Asset Management UK Limited | London | 1990 |
| BNP Paribas Commercial Finance Limited | Tunbridge Wells | 1992 |
| BNP Paribas Fleet Holdings Limited | Swindon | 2000 |
| BNP Paribas Lease Group Limited | Basingstoke | 1989 |
| BNP Paribas Leasing Solutions Limited | Basingstoke | 1967 |
| BNP Paribas Real Estate Investment Management (UK) Limited | London | 1987 |
| BNP Paribas Real Estate Investment Management Limited | London | 2006 |
| BNP Paribas Staff Benefits Trustee Limited | London | 2011 |
| BNP Payment Solutions Ltd | Gloucester | 2025 |
| BNP Venture Capital Ltd | London | 2018 |
| Bnpl Apartments UK Ltd | London | 2026 |
| BNR Group Ltd | London | 2024 |
| BNR Holdings Limited | Birkenhead | 2018 |
| BNR Infrastructure Co-Investment Limited | London | 2019 |
| Bnrw Investments Limited | Belfast | 2024 |
| BNS Capital Limited | Ruislip, | 2025 |
| BNS Holdings Ltd | Ascot | 2025 |
| BNS Properties Limited | Glasgow | 2019 |
| BNS Properties NO.2 Limited | Glasgow | 2019 |
| BNS Services Limited | Bristol | 2007 |
| BNT Europe Limited | Marlow | 2010 |
| BNV Capital Ltd | London | 2023 |
| Bnvp Group Ltd. | London | 2016 |
| BNW (Holdings) Limited | Chorley | 2001 |
| BNY Investment Ltd | Birmingham | 2025 |
| BNY Mellon Corporate Trustee Services Limited | London | 1991 |
| BNY Mellon Fund Managers Limited | London | 1986 |
| BNY Mellon International Asset Management (Holdings) Limited | London | 2012 |
| BNY Mellon Investment Management (Apac) Holdings Limited | London | 2003 |
| BNY Mellon Investment Management Emea Limited | London | 1973 |
| BNY Mellon Investment Management Europe Holdings Limited | London | 2012 |
| BNY Mellon Investment Management Holdings (Germany) Limited | London | 2005 |
| BNY Mellon Investment Management Seed Capital Limited | London | 2013 |
| BNY Mellon Investments Limited | London | 1996 |
| BNY Mellon Nominees Limited | London | 1986 |
| BNY Mellon Pershing Trustees Limited | Liverpool | 2012 |
| BNY Mellon SV Holdings Limited | London | 2022 |
| BNY Trust Company Limited | London | 1991 |
| BNY XBK (UK) Limited | London | 1998 |
| BO Living Limited | Wetherby | 2019 |
| BO Selecta Income Protecta Ltd | Leicester | 2024 |
| BO Venture Holdings Ltd | London | 2026 |
| BO Wild Ltd | Salisbury | 2024 |
| BOA 1NVESTMENT Ltd | Kingston Upon Thames | 2019 |
| BOA Vida Holdings Limited | John Archer Way | 2016 |
| Boag Dolman Financial Planning Ltd | Leeds | 2025 |
| Boal Limited | Livingston | 2015 |
| Boar Investments Limited | Cirencester | 2023 |
| Boarcross Holdings Limited | Driffield | 2024 |
| Boardley Group Limited | Ipswich | 2025 |
| Boardman Financial Limited | Longsdon | 2015 |
| Boardman Wealth Management Ltd | Wakefield | 1999 |
| Boardmans Holdings Limited | Manchester | 2019 |
| Boardmatter Enterprises Limited | Stourport-On-Severn | 1993 |
| Boardsco Limited | Tamworth | 2023 |
| Boardwalk Estate Ltd | London | 2018 |