| Blueberry Recruitment and Supported Living Ltd | Administrative & support | 2022 |
| Blueberry Services Ltd | Hospitality | 2025 |
| Blueberry Software Limited | Information & communication | 2006 |
| Blueberry Technical Resourcing Limited | Professional & scientific | 2020 |
| Blueberry Tools Limited | Information & communication | 2025 |
| Blueberry Transitional Care Ltd | Health & social care | 2016 |
| Blueberry Ventures Limited | Financial services | 2024 |
| Bluebird Bidco Limited | Financial services | 2024 |
| Bluebird Business Ltd | Hospitality | 2019 |
| Bluebird Finco Limited | Financial services | 2024 |
| Bluebird Midco Limited | Financial services | 2024 |
| Bluebird Topco Limited | Financial services | 2024 |
| Bluebreeze Ltd | Wholesale & retail | 2024 |
| Bluebrick Housing Ltd | Real estate | 2025 |
| Bluebridge Advisory Limited | Health & social care | 2025 |
| Bluebutton Property Management UK Limited | Construction | 2010 |
| Bluecaps Trading Ltd | Wholesale & retail | 2020 |
| Bluechilli Design & Print Limited | Manufacturing | 2009 |
| Bluechipcompany Limited | Information & communication | 2025 |
| Blueclaw Media Ltd | Information & communication | 2006 |
| Bluecore Heatsinks Limited | Manufacturing | 2008 |
| Bluecore Security Ltd | Administrative & support | 2026 |
| Bluedale Consultants Limited | Professional & scientific | 2002 |
| Bluedale Wholesale Ltd | Wholesale & retail | 2023 |
| Blueday Management Ltd | Extraterritorial | 2018 |
| Bluefield Care Services Limited | Health & social care | 2015 |
| Bluefields Property Solutions Ltd | Real estate | 2026 |
| Bluefinn Services Ltd | Administrative & support | 2021 |
| Bluefort Ltd | Wholesale & retail | 2024 |
| Bluefront Limited | Construction | 2025 |
| Bluegate Leisure Limited | Extraterritorial | 2009 |
| Bluegate Medical Ltd | Administrative & support | 2017 |
| Blueglow Global Limited | Financial services | 2025 |
| Blueharbor Trading Limited | Wholesale & retail | 2026 |
| Bluehill Interactive Ltd | Information & communication | 2024 |
| Bluehouse Property Ventures Ltd | Real estate | 2024 |
| Bluelandship Ltd | Information & communication | 2025 |
| Blueline Conferences Ltd | Extraterritorial | 2015 |
| Blueline Red & White Cars Ltd | Transport & logistics | 2018 |
| Blueline Victoria Cars Limited | Transport & logistics | 2023 |
| Bluelinx Management Ltd | Real estate | 2020 |
| Bluemineral Unified Comms Limited | Information & communication | 2022 |
| Bluemoon Technology Ltd | Information & communication | 2024 |
| Bluemoons Services Ltd | Transport & logistics | 2025 |
| Bluemoore Associates Ltd | Professional & scientific | 2021 |
| Bluengine Ltd | Information & communication | 2024 |
| Blueoak Care Staffing Ltd | Administrative & support | 2025 |
| Blueoak Construction Ltd | Construction | 2025 |
| Blueorbit Innovations Limited | Information & communication | 2026 |
| Blueorbit Nexus Ltd | Information & communication | 2026 |
| Blueorbitinnovationslabs Limited | Information & communication | 2026 |
| Bluepeak Holdings Ltd | Real estate | 2024 |
| Bluepeaks Ecommerce Ltd | Wholesale & retail | 2026 |
| Blueprint Investment Group Ltd | Real estate | 2021 |
| Blueprint Services Ltd | Manufacturing | 2000 |
| Blueprint Tableware Limited | Extraterritorial | 1998 |
| Bluerock Commerce Ltd | Wholesale & retail | 2026 |
| Bluerock Living Ltd | Real estate | 2025 |
| Blueroute Limited | Transport & logistics | 2025 |
| Blues Automotive Ltd | Wholesale & retail | 2024 |
| Blueshire Services Limited | Information & communication | 1995 |
| Blueskies ISM Limited | Professional & scientific | 2003 |
| Bluesky 34 Ltd | Professional & scientific | 2025 |
| Bluesky Business Consultancy Limited | Administrative & support | 2014 |
| Bluesky Capital Management Ltd | Financial services | 2019 |
| Bluesky Global Services Limited | Real estate | 2025 |
| Bluesky Pixels Ltd | Transport & logistics | 2019 |
| Bluesky Property Development & Renovation Limited | Construction | 2026 |
| BLUESKY35 Ltd | Wholesale & retail | 2025 |
| Bluestar Estates (Birmingham) Limited | Real estate | 2002 |
| Bluestar Mortgages Limited | Financial services | 2025 |
| Bluestar UK Trading Ltd | Wholesale & retail | 2023 |
| Bluestar Waste Services Ltd | Transport & logistics | 2024 |
| Bluestone Academy Limited | Education | 2025 |
| Bluetech Ltd | Information & communication | 2018 |
| Bluetel Solutions Limited | Information & communication | 2005 |
| Bluethorn Enterprise Ltd | Wholesale & retail | 2019 |
| Bluetick Estates Ltd | Real estate | 2025 |
| Bluetterfly Ltd | Professional & scientific | 2025 |
| Bluewater Accommodation Limited | Real estate | 2025 |
| Bluewater Facilities Ltd | Wholesale & retail | 2025 |
| Bluewater Group Holdings Limited | Financial services | 2015 |
| Bluewater Propco Limited | Real estate | 2021 |
| Bluewater Properties (Birmingham) Ltd | Real estate | 2025 |
| Bluewater Tax Accounting Limited | Professional & scientific | 2020 |
| Blueway Consulting Limited | Professional & scientific | 2014 |
| Blueway Healthcare Limited | Health & social care | 2023 |
| Blumes Official Ltd | Wholesale & retail | 2026 |
| Blundell Trading Limited | Professional & scientific | 2012 |
| Blunn Electrical Ltd | Construction | 2022 |
| Blunt Social Limited | Professional & scientific | 2025 |
| Blushbloom Ltd | Wholesale & retail | 2026 |
| Blushcurated Ltd | Wholesale & retail | 2026 |
| Blushstudio Beauty Ltd | Other services | 2025 |
| Bluu Spirit Limited | Manufacturing | 2016 |
| Bluverge Ltd | Other services | 2025 |
| Blvck Limited | Wholesale & retail | 2026 |
| Blvckwoodbrothers Ltd | Professional & scientific | 2020 |
| BLX Cars Ltd | Wholesale & retail | 2025 |
| Blxck Chauffeurs Limited | Transport & logistics | 2025 |