| Blueton (Holdings) Limited | Glasgow | 2018 |
| Bluetooth PVT Limited | Edinburgh | 2020 |
| Bluetrain Capital Limited | London | 2024 |
| Bluetree Group Limited | Manvers | 2021 |
| Bluetube Group Ltd | Newport | 2024 |
| Bluevaria Investments and Proceeds Ltd | Dewsbury | 2022 |
| Blueveron Investments Ltd | London | 2026 |
| Blueverse Limited | London | 2021 |
| Bluevest Capital Partners Limited | Maidstone | 2019 |
| Bluevista Ltd | Southend-On-Sea | 2025 |
| Bluewater Financial Services Limited | Camberley | 2004 |
| Bluewater Group Holdings Limited | Birmingham | 2015 |
| Bluewater Two Limited | London | 2022 |
| Bluewave Mortgages and Protection Ltd | Worcester | 2022 |
| Bluewood Trading Ltd | Sevenoaks | 2020 |
| Bluezone Capital Ltd | London | 2015 |
| Bluham Limited | London | 2025 |
| Bluhe Shire Investments Ltd | Croydon | 2024 |
| Bluice Financial Ltd | London | 2018 |
| Blukite Group (MIS) Limited | Aberkenfig | 2021 |
| Blukonzept Group Limited | Bexhill-On-Sea | 2024 |
| Blum Holdings Ltd | London | 2020 |
| Bluma Investment Ltd | London | 2024 |
| Blumarble Capital Limited | Billericay | 2012 |
| Blume Design Group Holdings Ltd | Leeds | 2026 |
| Blumont Annuity Company UK Ltd | Canary Wharf | 2022 |
| Blumont Annuity Holdings UK Ltd | London | 2022 |
| Blundells (Chesham) Limited | Fareham | 1941 |
| Blundy Holdings Limited | Sittingbourne | 2022 |
| Bluneco Ltd | Covent Garden | 2018 |
| Blunston Group Ltd | London | 2021 |
| Bluprint Solutions Ltd | Letchworth Garden City | 2016 |
| Bluprintx Holdings Limited | Liverpool | 2019 |
| Blupro Holdings Limited | Ashby-De-La-Zouch | 2023 |
| Bluseal (Holdings) Limited | Worcester | 2010 |
| Blush Pink Ltd | Redhouse | 2020 |
| Blushes Holdings Limited | Gloucester | 2020 |
| Blusk Holdings Limited | London | 2025 |
| Blustone Capital Ltd | London | 2020 |
| Blutail Financial Limited | Belfast | 2015 |
| Blutech Holdings Limited | Sale | 2021 |
| Blutek Enterprise Ltd | Nottingham | 2025 |
| Blutek Holdings Ltd | Nottingham | 2025 |
| Bluthrot Capital Ltd | London | 2025 |
| Bluto Limited | Fareham | 2026 |
| BLV Coventry (Holdings) Limited | Coventry | 2021 |
| BLV East Limited | Bishop’S Stortford | 2025 |
| BLV Holdings Limited | London | 2018 |
| Blvck Gems Ltd | London | 2022 |
| BLW Holdings Limited | Norwich | 2023 |
| BLW Insurance Brokers Ltd | Rochford | 1971 |
| BLW Property Limited | Manchester | 2022 |
| Blxio Limited | Wickford | 2025 |
| BLY Holdings Limited | Grantham | 2020 |
| BLY Investments UK Ltd | Kington | 2026 |
| Blyth Collinson Holding Limited | London | 2025 |
| Blyth Group Holdings Limited | Wolverhampton | 2015 |
| Blyth Holdings Limited | London | 2018 |
| Blyth-Richmond Investment Managers Limited | Cropston | 2022 |
| Blythburgh Holdings Ltd | London | 2021 |
| Blythe Capital | Ormskirk | 2018 |
| Blythe Hill Group Ltd | London | 2026 |
| Blythe Investments | Ormskirk | 2018 |
| Blythe Road Investments Limited | London | 2017 |
| Blythin & Brown (Corporate Solutions) Ltd | Lutterworth | 2018 |
| Blytholme Group Limited | Colchester | 2020 |
| Blythswood Associates Ltd | Glasgow | 2013 |
| Blythswood Consulting Ltd | Cardiff | 2016 |
| Blythswood Holdings Ltd | Renfrew | 2019 |
| Blythswood LIC Limited | Glasgow | 2023 |
| BM (South Coast) Limited | Fareham | 2008 |
| BM Asset Finance Ltd | Johnstone | 2026 |
| BM Capital Ltd | London | 2024 |
| BM Direct Holdings Limited | Blackpool | 2024 |
| BM Edwards Limited | Swindon | 2025 |
| BM Global Capital Limited | London | 2022 |
| BM Holdings Group Limited | Newcastle-Under-Lyme | 2020 |
| BM Horner Ltd | Taunton | 2023 |
| BM Kuna Property Developments Limited | Sheffield | 2010 |
| BM Liverpool Limited | London | 2010 |
| BM Locksmiths (Holdings) Ltd | Birmingham | 2020 |
| BM Manchester 1 Limited | London | 2019 |
| BM Manchester 2 Limited | London | 2019 |
| BM Multi Corp Ltd | Birmingham | 2023 |
| BM Newco 1 2026 Limited | Jarrow | 2026 |
| BM Property (Langley) Limited | Ascot | 2020 |
| BM Property Finance Ltd | Cardiff | 2024 |
| BM Property Insurance Services Limited | Alton | 2008 |
| BM Racing Limited | Stourbridge | 2010 |
| BM SED Ltd | Estover | 2019 |
| BM Springboard Bidco Limited | London | 2021 |
| BM Springboard Midco Limited | London | 2021 |
| BM Tailor Holdings Limited | London | 2023 |
| BM Trustees Limited | Marlborough | 2006 |
| BM Vehicle Services Ltd | Letchworth Garden City | 2024 |
| BM Vehicle Solutions Limited | Wadhurst | 2024 |
| BM Wealth Management Limited | Chesterfield | 2009 |
| BM-09 Ltd | Delph | 2024 |
| BM14 Finance Ltd | Gillingham | 2026 |
| BM3 Group Limited | Birmingham | 2021 |