| Blind Rage Limited | Manufacturing | 1993 |
| Blind Shops Near ME Ltd | Professional & scientific | 2023 |
| Blind Tiger Films Ltd | Information & communication | 2021 |
| Blindburn Property Limited | Real estate | 2018 |
| Blindersbgrz Ltd | Hospitality | 2026 |
| Blinds 4 ALL Ltd | Manufacturing | 2021 |
| Blinds Gallery Ltd | Manufacturing | 2016 |
| Blinds Nation Ltd | Wholesale & retail | 2026 |
| Bling Industrial Cleaning Solutions Ltd | Administrative & support | 2017 |
| Bling Mobile Ltd | Wholesale & retail | 2025 |
| Bling Wholesale Ltd | Manufacturing | 2025 |
| Blink AA Ltd | Wholesale & retail | 2025 |
| Blink Business Link Ltd | Administrative & support | 2020 |
| Blinkers Property Limited | Other services | 1994 |
| Blinkship Ltd | Transport & logistics | 2024 |
| Blinkswipe Ltd | Wholesale & retail | 2023 |
| Blinkz Technologies Ltd | Professional & scientific | 2026 |
| Blinkz World Ltd | Manufacturing | 2023 |
| Blinq Accounting Limited | Professional & scientific | 2018 |
| Blish Crown Ltd | Information & communication | 2025 |
| Bliss Catering Limited | Hospitality | 2025 |
| Bliss ENT Ltd | Information & communication | 2020 |
| Bliss Housing Limited | Real estate | 2025 |
| Bliss Lotus Ltd | Health & social care | 2026 |
| Bliss Studio Limited | Other services | 2024 |
| Blissful Bites Catering Limited | Hospitality | 2025 |
| Blissfullshop Ltd | Wholesale & retail | 2024 |
| Blisstree Ltd | Wholesale & retail | 2023 |
| Blitransport Ltd | Transport & logistics | 2024 |
| Blitz Motor Factors Limited | Wholesale & retail | 2017 |
| Bliving Limited | Households | 2022 |
| Blizzards Consulting Limited | Professional & scientific | 2023 |
| BLK House Ltd | Hospitality | 2023 |
| BLM Bar & Lounge Ltd | Hospitality | 2025 |
| BLM Building Limited | Construction | 2020 |
| BLM Property Management Ltd | Real estate | 2025 |
| Bloafer Ltd | Information & communication | 2007 |
| Blobbo Ltd | Professional & scientific | 2026 |
| Bloc Burton Lodge Limited | Construction | 2021 |
| Bloc H2 Halifax Limited | Construction | 2013 |
| Bloc Market Ltd | Professional & scientific | 2025 |
| BLOC41 Ltd | Other services | 2023 |
| Blocc Limited | Manufacturing | 2009 |
| Block Code Protected Limited | Professional & scientific | 2020 |
| BLOCK47 Ltd | Information & communication | 2010 |
| Blockchain Advisors Ltd | Information & communication | 2022 |
| Blockchain Technologies Ltd | Information & communication | 2024 |
| Blocked Site Limited | Professional & scientific | 2006 |
| Blocktechai Ltd | Information & communication | 2021 |
| Bloco Ltd | Information & communication | 2019 |
| Blocvey Ltd | Information & communication | 2025 |
| Blonde on Blonde (Birmingham) Ltd | Other services | 2009 |
| Blondies Hair Design Limited | Other services | 2020 |
| Blondu Cargo Ltd | Transport & logistics | 2018 |
| Bloo Property Ltd | Real estate | 2025 |
| Bloo Riviera Limited | Real estate | 2024 |
| Blood and Medical Services Ltd | Health & social care | 2018 |
| Bloodline Muzik Ltd | Manufacturing | 2023 |
| Bloodwood Accounting Ltd | Professional & scientific | 2016 |
| Bloom Academy Ltd | Education | 2025 |
| Bloom DOT Limited | Wholesale & retail | 2025 |
| Bloom Health Limited | Health & social care | 2024 |
| Bloom Home Care Limited | Health & social care | 2025 |
| Bloom Property Services Ltd | Real estate | 2025 |
| Bloom Speech and Language Therapy Services Limited | Health & social care | 2021 |
| Bloom Tuition Limited | Education | 2017 |
| Bloomfield Limited | Manufacturing | 1990 |
| Bloomfield Veterinary Services Ltd | Professional & scientific | 2023 |
| Bloomin Lovely Limited | Wholesale & retail | 2017 |
| Blooming Almond Ltd | Wholesale & retail | 2024 |
| Blooming Books & Accounts Ltd | Professional & scientific | 2025 |
| Blooming Catering Limited | Hospitality | 2023 |
| Blooming Group Holdings Ltd | Financial services | 2026 |
| Blooming Property Services Ltd | Real estate | 2024 |
| Bloomish Ltd | Wholesale & retail | 2025 |
| Bloomiya UK Ltd | Information & communication | 2025 |
| Bloomkind-Uk Ltd | Education | 2025 |
| Blooms by Vanita Ltd | Professional & scientific | 2018 |
| Bloomsbury Glass Limited | Manufacturing | 2004 |
| Bloomsbury Prime Services Ltd | Real estate | 2021 |
| Bloomwise Ltd | Professional & scientific | 2020 |
| Blosse Limited | Professional & scientific | 2022 |
| Blossnest C.I.C. | Education | 2025 |
| Blossom & Garden Ltd | Manufacturing | 2024 |
| Blossom Associates Ltd | Administrative & support | 2025 |
| Blossom Breeze Ltd | Wholesale & retail | 2024 |
| Blossom Cakes and Events Ltd | Hospitality | 2025 |
| Blossom Childcare (Bham) Ltd | Administrative & support | 2025 |
| Blossom Consultants and Training Ltd | Professional & scientific | 2024 |
| Blossom Court Estate Management Limited | Households | 2024 |
| Blossom Day Care Center Limited | Health & social care | 2026 |
| Blossom Grove Care Ltd | Health & social care | 2025 |
| Blossom Home Renovation Ltd | Construction | 2025 |
| Blossom Housing Limited | Real estate | 2022 |
| Blossom Living Childcare Limited | Health & social care | 2025 |
| Blossom Living Midlands Ltd | Health & social care | 2024 |
| Blossom Street Florists Ltd | Wholesale & retail | 2024 |
| Blossom Weddings Limited | Hospitality | 2024 |
| Blossomfield (Thorp Arch) Management Company Limited | Households | 2021 |
| Blossomfield Mortgages Ltd | Financial services | 2019 |