| Blueness Beauty Ltd | London | 2024 |
| Bluenest Solutions Ltd | London | 2023 |
| Blueport Health Limited | Barnsley | 2026 |
| Blueprint Brilliance Limited | London | 2025 |
| Blueprint Concepts UK Limited | London | 2024 |
| Blueprint Content Studios Limited | London | 2025 |
| Blueprint Creation Limited | Manchester | 2012 |
| Blueprint Foundation | Harpenden | 2017 |
| Blueprint Housing and Communities Project Ltd | Bolton | 2025 |
| Blueprint Ministries NI | Bangor | 2024 |
| Blueprint Partners International Limited | London | 2015 |
| Blueprint Programming & PT Limited | Bristol | 2023 |
| Blueprint ST Limited | Northampton | 2026 |
| Blueprint Trading Limited | London | 2018 |
| Blueprint Training & Management Ltd | London | 2018 |
| Blueprint Training Solutions Limited | Glasgow | 2004 |
| BLUEPRINT3D Ltd | Shrewsbury | 2021 |
| Blueprinting Limited | Woking | 2018 |
| Blueprometheus Ltd | Stoke-On-Trent | 2014 |
| Bluequinn Limited | Bournemouth | 2015 |
| Blueray Healthcare Limited | Northampton | 2015 |
| Bluereach Ltd | London | 2024 |
| Blueridge Properties Ltd | Preston | 2009 |
| Bluerkk Ltd | Whitstable | 2022 |
| Blueroc Limited | Congleton | 2004 |
| Bluerock Capital Europe Limited | Hythe | 2020 |
| Bluerock Property Developments Ltd | Kilmarnock | 2025 |
| Bluerose Tattoos Ltd | Chislehurst | 2017 |
| Blues Cleaning Services Limited | Warlingham | 2022 |
| Blues Hair Workshop Limited | Morley | 2010 |
| Blues Hairdressing Limited | Little Eaton | 2010 |
| Blues HQ Limited | Bradford | 2022 |
| Blues Inn Ltd | London | 2024 |
| Blues Medispa Ltd | Bradford | 2026 |
| Blues of Burton Ltd | Burton On Trent | 2023 |
| Blues WQ Ltd | Bradford | 2024 |
| Bluescore Limited | Ashford | 2025 |
| Blueshield Heating Care Ltd | Widnes | 2009 |
| Blueshift Productions Limited | London | 2016 |
| Bluesky AI Ltd | Radlett | 2025 |
| Bluesky Cleaning Ltd | Craigavon | 2022 |
| Bluesky Resource Recovery Limited | Coleraine | 2008 |
| Bluesky- Recruitment Ltd | Cardiff | 2020 |
| Blueskyblue UK Limited | Lutterworth | 2010 |
| Blueskyfx Capital Ltd | Prescot | 2024 |
| Blueslug Limited | Skipton | 2021 |
| Bluesoul Global Ltd | Egham | 2024 |
| Bluestar Africa Finance Group PLC | London | 2020 |
| Bluestar Global Medical Services Ltd | Newcastle Upon Tyne | 2023 |
| Bluestone Hydrotherapy Ltd | Salisbury | 2024 |
| Bluestone Leisure Limited | Ormskirk | 2018 |
| Bluestone Trading Limited | Manchester | 2024 |
| Bluestones One Merchandising Limited | Chester | 2017 |
| Bluestream Management PMC Limited | Sunderland | 2020 |
| Bluet Sales and Marketing Limited | London | 2019 |
| Bluetech International Limited | London | 2022 |
| Blueteq Trustees Limited | Havant | 2025 |
| Bluetex Limited | London | 2025 |
| Bluethorn Trading Limited | Nottingham | 2019 |
| Bluetint Solutions Limited | | 2005 |
| Bluetrack (UK) Ltd | London | 2012 |
| Bluetrack Limited | London | 2005 |
| Bluevapour Limited | Basildon | 2016 |
| Bluevelvety Limited | Dartford | 2020 |
| Bluevoice Ltd | Dereham | 2013 |
| Bluevolution Limited | Bromsgrove | 2021 |
| Bluewater (T) Hairdressing Limited | Alton | 2016 |
| Bluewater Assets Limited | Bolton | 2004 |
| Bluewaters Canine Centre Ltd | Bromsgrove | 2018 |
| Bluewave International Limited | Northampton | 2003 |
| Bluewave Launderette Ltd | Hayes | 2025 |
| Bluewave Services Limited | Woodhall Spa | 2006 |
| Bluewe Ltd | London | 2025 |
| Bluewolf Computers Limited | Nottingham | 2023 |
| Bluezone Fitness Limited | Solihull | 2025 |
| Bluf Ltd | London | 2016 |
| Blufield Ltd | York | 2015 |
| Blugen Ltd | Telford | 2019 |
| Blugrid Ltd | London | 2025 |
| Bluline Administration Limited | Worcester | 2017 |
| Bluline Gloucestershire Limited | Worcester | 2013 |
| Bluline Health Limited | Worcester | 2013 |
| Blume Floristry Limited | Borehamwood | 2020 |
| Blumi Group Limited | London | 2024 |
| Blundell Holdings Limited | Horsham | 2025 |
| Blundells Daycare for Dogs Ltd | Wigan | 2017 |
| Blunt & Brave Ltd | Bedworth | 2019 |
| Blunt Barbershop Limited | Adderbury | 2024 |
| Blunt by Daniel Ltd | Grantham | 2023 |
| Blunt Hairstyling Ltd | Bournemouth | 2019 |
| Blunt Lines Ltd | Reading | 2024 |
| Blunt Productions Limited | London | 2009 |
| Blunt Pubs Limited | Andover | 2017 |
| Blunt Salon Limited | Cardiff | 2022 |
| Blunt the Space Limited | Hull | 2025 |
| Blunted Barbers Limited | Edinburgh | 2018 |
| Blunts Chair Rentals Ltd | Sidmouth | 2026 |
| Bluntside Barber Studio Limited | Tamworth | 2025 |
| Blunwin Limited | Stockport | 2014 |
| Blurace Ltd | Ilford | 2021 |