| Blue JAY Financial Limited | Professional & scientific | 2023 |
| Blue Jeans Bar Limited | Hospitality | 2014 |
| Blue Keystone Limited | Construction | 2009 |
| Blue Line Europe Ltd | Administrative & support | 2025 |
| Blue Lotus Group Ltd | Wholesale & retail | 2019 |
| Blue Makalu Limited | Information & communication | 2022 |
| Blue Marvel Solutions Limited | Professional & scientific | 2021 |
| Blue Meadow Trading Limited | Wholesale & retail | 2025 |
| Blue Monkey Vending (Holdings) Limited | Financial services | 2014 |
| Blue Monkey Vending Limited | Manufacturing | 2014 |
| Blue Moon Health and Wellbeing Limited | Health & social care | 2020 |
| Blue Nile General Trading Limited | Wholesale & retail | 2025 |
| Blue Ocean International Education Ltd | Wholesale & retail | 2017 |
| Blue Oranje Ltd | Construction | 2018 |
| Blue OWL Risk Management Services Limited | Financial services | 2018 |
| Blue Poppy Boutique Limited | Wholesale & retail | 2016 |
| Blue Reef Projects Limited | Administrative & support | 2000 |
| Blue Ribbon Group Ltd. | Transport & logistics | 2018 |
| Blue Ridge Exchange Limited | Financial services | 2011 |
| Blue River International Trading Company Limited | Extraterritorial | 2018 |
| Blue Sail Enterprises Ltd | Administrative & support | 2019 |
| Blue Salmon Limited | Hospitality | 2019 |
| Blue Self Storage (Properties) Limited | Real estate | 2022 |
| Blue Self Storage Limited | Real estate | 2018 |
| Blue Silver Consultancy Limited | Real estate | 2008 |
| Blue Skies Global Ltd | Information & communication | 2019 |
| Blue Skies Security Guard Ltd | Administrative & support | 2025 |
| Blue Sky Apartments Ltd | Hospitality | 2025 |
| Blue Sky Software Ltd | Information & communication | 2025 |
| Blue Sky Solar Developments PLC | Professional & scientific | 2016 |
| Blue Smoke Properties Ltd | Extraterritorial | 2020 |
| Blue Spot Computers Limited | Wholesale & retail | 2005 |
| Blue Stag Studio Limited | Professional & scientific | 2008 |
| Blue Star Club Ltd. | Information & communication | 2025 |
| Blue Storage Group Limited | Financial services | 2022 |
| Blue Sun Innovations Ltd | Wholesale & retail | 2021 |
| Blue Sunstone & Weintraub-Pc Asset Vectors Ltd | Professional & scientific | 2021 |
| Blue Swell Investments Ltd | Real estate | 2018 |
| Blue Tech Lining Ltd | Information & communication | 2025 |
| Blue Tech Wholesale Limited | Wholesale & retail | 2016 |
| Blue Theia International Company Ltd | Wholesale & retail | 2022 |
| Blue Thums UP Ltd | Hospitality | 2023 |
| Blue Train Group Limited | Administrative & support | 2019 |
| Blue World London Ltd | Construction | 2025 |
| Bluebay Enterprises Limited | Real estate | 2016 |
| Bluebay Estate Agents Limited | Real estate | 2002 |
| Bluebell Assets Limited | Real estate | 2017 |
| Blueberry (Midlands) Limited | Professional & scientific | 2016 |
| Blueberry Labs Ltd. | Wholesale & retail | 2024 |
| Blueberry Private Ltd | Wholesale & retail | 2023 |
| Blueberry Talent Ltd | Administrative & support | 2023 |
| Bluebird Financial Services Ltd | Financial services | 2019 |
| Bluebird Properties Limited | Households | 2004 |
| Bluebirdexec Ltd | Administrative & support | 2019 |
| Bluebirds 1927 Limited | Information & communication | 2018 |
| Bluebirds Development Co Limited | Construction | 2013 |
| Bluebottle Marketing Ltd | Wholesale & retail | 2020 |
| Bluebox Technologies Limited | Professional & scientific | 2008 |
| Bluebricklettings Limited | Hospitality | 2025 |
| Bluebridge Ventures Ltd | Wholesale & retail | 2025 |
| Blueclip Ltd | Information & communication | 2022 |
| Bluecrown Ecommerce Limited | Wholesale & retail | 2026 |
| Bluecube Marine Ltd | Professional & scientific | 2022 |
| Bluedge Designs Ltd | Professional & scientific | 2025 |
| Bluedila Digital Ltd | Wholesale & retail | 2025 |
| Bluedog Media Ltd | Professional & scientific | 2012 |
| Bluefield CWM and Phurnacite Limited | Construction | 2026 |
| Bluefield Developments Limited | Construction | 2012 |
| Bluefield Energy Limited | Energy | 2015 |
| Bluefield Homes Limited | Construction | 2015 |
| Bluefield Land Ltd | Construction | 2004 |
| Bluefield Sandbach Limited | Construction | 2006 |
| Bluefin Services Ltd | Administrative & support | 2019 |
| Bluefluff Limited | Information & communication | 2007 |
| Bluefly IT Services Ltd | Financial services | 2024 |
| Bluegene Biotechnology Ltd | Extraterritorial | 2018 |
| Bluegg Creative Limited | Professional & scientific | 2023 |
| Bluegreen Recruit Limited | Administrative & support | 2022 |
| Blueharbor Services Ltd | Wholesale & retail | 2026 |
| Bluehaven Residential Limited | Real estate | 2021 |
| Bluehull Marine Engineering Ltd | Manufacturing | 2025 |
| Bluelime IT Consultancy Ltd | Administrative & support | 2012 |
| Blueline Financial Services Limited | Financial services | 2021 |
| Bluepeak CRE Advisors Ltd | Professional & scientific | 2025 |
| Blueprint Enterprise Ltd | Professional & scientific | 2017 |
| Blueprint Installations Limited | Construction | 2017 |
| Blueprint Retail Limited | Wholesale & retail | 2007 |
| Blueprint Square Ltd | Information & communication | 2016 |
| Blueray Logistics Limited | Transport & logistics | 2017 |
| Bluerockawaisamjad Ltd | Wholesale & retail | 2026 |
| Blues Electrical Limited | Construction | 1990 |
| Blues Fire & Integrated Services Limited | Construction | 2019 |
| Blues Holdings Ltd | Financial services | 2023 |
| Blues K Technology Co., Ltd | Manufacturing | 2021 |
| Blueseatrader Ltd | Wholesale & retail | 2025 |
| Bluesky- Recruitment Ltd | Other services | 2020 |
| Bluespot Business Ltd | Wholesale & retail | 2014 |
| Bluespot Communications Ltd | Information & communication | 2021 |
| Bluespot Fire & Security Limited | Construction | 2018 |
| Bluestar Global Consulting Ltd | Professional & scientific | 2013 |