| Briant Trade Ltd | Extraterritorial | 2024 |
| Briargrove Property Limited | Real estate | 2009 |
| Briartree Manor Management Company Limited | Administrative & support | 2003 |
| Brick & Beam Holdings Ltd | Construction | 2025 |
| Brick & Otter Ltd | Other services | 2017 |
| Brick Barn Real Estate Ltd | Households | 2020 |
| Brick Construction (Reading) Limited | Construction | 2012 |
| Brick Road Toys Limited | Wholesale & retail | 2022 |
| Brickbarn Developments Ltd | Real estate | 2024 |
| Brickfields Ltd | Construction | 2019 |
| Brickflair Construction Ltd | Construction | 2018 |
| Brickflair Holdings Limited | Real estate | 2009 |
| Brickle Ltd | Manufacturing | 2024 |
| Brickmoore Developments Ltd | Construction | 2018 |
| Bricks Group Asset Management Limited | Real estate | 2021 |
| Bricks K Capital Limited | Construction | 2013 |
| Bricks K3 Capital Limited | Administrative & support | 2014 |
| Bricks Leicester Opco Limited | Real estate | 2019 |
| Bricks Norwich Capital Limited | Construction | 2018 |
| Bricks Norwich Opco Limited | Real estate | 2018 |
| Bricks Norwich Propco Limited | Construction | 2018 |
| Bricks Sense Ltd | Manufacturing | 2021 |
| Bricksmith Limited | Administrative & support | 2021 |
| Brickstitch Limited | Construction | 2008 |
| Brickstoneworks Limited | Construction | 2026 |
| Brickwall Works Ltd | Manufacturing | 2016 |
| Bridal Magic Limited | Wholesale & retail | 1997 |
| Briden Lewis Limited | Health & social care | 2011 |
| Brides Guide Ltd | Professional & scientific | 2013 |
| Bridge 2 Rent Ltd | Real estate | 2025 |
| Bridge Brickwork Ltd | Construction | 2019 |
| Bridge Executive Consulting Ltd | Professional & scientific | 2025 |
| Bridge Executive Search Ltd | Administrative & support | 2024 |
| Bridge Global Limited | Professional & scientific | 2024 |
| Bridge Interpreting Services Ltd. | Professional & scientific | 2014 |
| Bridge Management Solutions Limited | Professional & scientific | 2014 |
| Bridge Pension Administrators Limited | Administrative & support | 2017 |
| Bridge Personnel Limited | Wholesale & retail | 2020 |
| Bridge Phone Ltd | Real estate | 2025 |
| Bridge Properties Cardiff Limited | Households | 2010 |
| Bridge Sellers Limited | Wholesale & retail | 2025 |
| Bridge Street (Newport) Limited | Financial services | 2025 |
| Bridge Street Cardiff Properties Limited | Real estate | 1954 |
| Bridge Valley Holdings Ltd | Financial services | 2019 |
| Bridge Valley Limited | Administrative & support | 2015 |
| Bridge West Ltd | Wholesale & retail | 2020 |
| BRIDGE4UNI UK Ltd | Education | 2025 |
| Bridgelink Management Ltd | Professional & scientific | 2025 |
| Bridgeman Psychological Consultancy Ltd | Health & social care | 2017 |
| Bridgend Biomass Products Limited | Transport & logistics | 2014 |
| Bridgend Dental Surgery Limited | Health & social care | 2023 |
| Bridgend Trade Ltd | Wholesale & retail | 2017 |
| Bridgend West Side Limited | Real estate | 2012 |
| Bridgepoint Services Limited | Wholesale & retail | 2024 |
| Bridger & Co Limited | Professional & scientific | 2013 |
| Bridgerock Contracting Limited | Construction | 2022 |
| Bridgestaff Group Limited | Administrative & support | 2026 |
| Bridgetime Transport Limited | Wholesale & retail | 2002 |
| Bridgetown Limited | | 1983 |
| Bridgewater Engineering Ltd | Professional & scientific | 2019 |
| Bridgeway HR Solution Ltd | Administrative & support | 2026 |
| Bridgeway Supply Chain Limited | Professional & scientific | 2025 |
| Bridgewell International Limited | Extraterritorial | 2026 |
| Bridgeworks Path Ltd | Information & communication | 2025 |
| Bridgford Property Ltd | Real estate | 2018 |
| Bridging Gender Gaps CIC | Health & social care | 2024 |
| Bridgio Media Ltd | Professional & scientific | 2025 |
| Bridneilw Limited | Wholesale & retail | 2025 |
| Briecos Ltd | Manufacturing | 2025 |
| Brigade Solutions Ltd | Real estate | 2012 |
| Brigantine Court RTM Company Limited | Real estate | 2008 |
| Bright Accommodation Service Ltd | Hospitality | 2025 |
| Bright Blank Pages Ltd | Professional & scientific | 2024 |
| Bright Bookkeeping Limited | Professional & scientific | 2023 |
| Bright Branch Media Ltd | Information & communication | 2019 |
| Bright Champion PC | | 2016 |
| Bright Chemical Group Limited | Extraterritorial | 2019 |
| Bright Childminding Ltd | Administrative & support | 2025 |
| Bright Cloud Saas Ltd | Information & communication | 2025 |
| Bright Commercial Cleaning Limited | Administrative & support | 2019 |
| Bright Future Acceleration Ltd | Professional & scientific | 2019 |
| Bright Heart Ltd | Administrative & support | 2016 |
| Bright House Care Services Ltd | Transport & logistics | 2017 |
| Bright Kids Club Limited | Education | 2021 |
| Bright Markketing Ltd | Information & communication | 2019 |
| Bright Presence Ltd | Manufacturing | 2022 |
| Bright Recruitment Ltd | Administrative & support | 2014 |
| Bright Shine Cleaning Ltd | Administrative & support | 2026 |
| Bright Spark Care Limited | Health & social care | 2011 |
| Bright Sparks Auto Care Ltd | Wholesale & retail | 2023 |
| Bright Start Recruitment Services Limited | Administrative & support | 2015 |
| Bright Storage Solutions Limited | Transport & logistics | 2018 |
| Bright Surge Electrical Ltd | Construction | 2025 |
| Bright Vision Holding Ltd | Construction | 2019 |
| Bright Vision Real Estate Ltd | Real estate | 2021 |
| Bright Vision Retail Ltd | Wholesale & retail | 2023 |
| Bright VUE Ltd | Construction | 2012 |
| Brightbox Workspace Ltd | Real estate | 2021 |
| Brighter Facilities Management Ltd | Administrative & support | 2016 |
| Brighter Quarters Limited | Real estate | 2025 |