| Breakwater Recruitment Ltd | Administrative & support | 2017 |
| Breakwich Limited | Hospitality | 2023 |
| Breathwork Mastery Ltd | Health & social care | 2025 |
| Breed Global Limited | Real estate | 2020 |
| Brenda Nominees Limited | Other services | 2018 |
| Brendan Mccarthy Editor Ltd | Other services | 2015 |
| Brentwell Ltd | Professional & scientific | 2026 |
| Brentwood House Management Company (Manchester) Limited | Households | 1980 |
| Brew-Tang Ltd | Arts & recreation | 2019 |
| Brew. the VIC Ltd | Hospitality | 2025 |
| Brew. Tomorrow Limited | Hospitality | 2025 |
| Brian Mwanza Limited | Transport & logistics | 2019 |
| Bricc Clothing Limited | Wholesale & retail | 2024 |
| Bricks & Roots Limited | Real estate | 2025 |
| Brickworks (Cheshire) Limited | Professional & scientific | 2022 |
| Bridge 28 Ltd | Real estate | 2026 |
| Bridge Fruit and VEG World Wide Distribution Ltd | Wholesale & retail | 2025 |
| Bridge Malta Holdings Limited | Financial services | 2025 |
| Bridge Medicolegal Reporting Ltd | Health & social care | 2024 |
| Bridge Medicolegal Services Ltd | Professional & scientific | 2019 |
| Bridge Rehabilitation Services Limited | Administrative & support | 2009 |
| Bridge Technology Partners Limited | Administrative & support | 2002 |
| Bridge to Mortgage Ltd | Financial services | 2022 |
| Bridge-Ipro Ltd | Financial services | 2016 |
| Bridgefleet Limited | Households | 1982 |
| Bridgeheath Limited | Professional & scientific | 1988 |
| Bridgewater Home Solutions Ltd | Real estate | 2021 |
| Bridgewater Residents Association Ltd | Other services | 2025 |
| Bridgewater Security Limited | Administrative & support | 2013 |
| Brief Services Limited | Other services | 2025 |
| Bright Future Consultancy MCR Ltd | Information & communication | 2026 |
| Bright Hills Partners Ltd. | Information & communication | 2025 |
| Bright Oak Limited | Financial services | 2008 |
| Bright Path Project Limited | Health & social care | 2025 |
| Bright Prospects Ltd | Real estate | 2017 |
| Bright Sheep Property Limited | Real estate | 2019 |
| Bright Sound Music CIC | Education | 2026 |
| Bright Spark Adhd Ltd | Health & social care | 2025 |
| Bright Spot Limited | Wholesale & retail | 2013 |
| Brightbay Properties Limited | Real estate | 2003 |
| Brightcarbon Ltd | Professional & scientific | 2011 |
| Brighter Wave Gaming Ltd | Information & communication | 2025 |
| Brighthelp AI Ltd | Information & communication | 2025 |
| Brightstyle Properties Ltd | Real estate | 2019 |
| Brilliant Trees Media Ltd | Information & communication | 2007 |
| Brimstone Properties NE Ltd | Real estate | 2016 |
| Brindley Road Estates Limited | Other services | 2021 |
| Brindley Road Holdings Limited | Other services | 2021 |
| Brinner Ltd | Other services | 2025 |
| Bristar Electronic Ltd | Wholesale & retail | 2021 |
| Bristol Enterprises Ltd | Extraterritorial | 2017 |
| Brit Essential Limited | Wholesale & retail | 2020 |
| Brit Group of Companies Ltd | Wholesale & retail | 2020 |
| Brit Haven Ltd | Wholesale & retail | 2025 |
| Britdeals Limited | Professional & scientific | 2017 |
| Britealtura Homes Ltd | Real estate | 2025 |
| Brithomes (N/W) Limited | Construction | 2019 |
| Britroll Manufacturing Ltd | Manufacturing | 2025 |
| Brndco Ltd | Wholesale & retail | 2025 |
| Broad Street Assets Limited | Real estate | 2021 |
| Broad Street Estates Limited | Real estate | 2018 |
| Broadcast Cameras Ltd | Information & communication | 2013 |
| Broadmeadow Limited | Extraterritorial | 2001 |
| Broadrose Developments Limited | Real estate | 1999 |
| Broadstairs Properties Ltd | Real estate | 2017 |
| Broadway Leasing Ltd | Administrative & support | 1998 |
| Broder Estates Limited | Real estate | 2020 |
| Brohi Holdings Ltd | Real estate | 2025 |
| Bromton Properties Ltd | Real estate | 2026 |
| Bronze Boutique Limited | Other services | 2017 |
| Brookfield Properties Limited | Real estate | 1959 |
| Brooking Investments Ltd | Real estate | 2003 |
| Brooklyn Hill Limited | Real estate | 2018 |
| Brookside Industrial Park Ltd | Extraterritorial | 2000 |
| Brookside Shelter and Care Limited | Real estate | 2026 |
| Broom Assets Limited | Real estate | 2022 |
| Broom Lane Estates Ltd | Real estate | 2019 |
| Broom Lane Limited | Real estate | 2026 |
| Broome Events Group Limited | Other services | 2020 |
| Broomloan Ltd | Real estate | 2024 |
| Brother Brother Ltd | Information & communication | 2020 |
| Brothers, Sisters & Mates Connections CIC | Transport & logistics | 2013 |
| Broughton Convenience Store Ltd | Wholesale & retail | 2019 |
| Broughton Health Alliance Primary Care Network Ltd | Health & social care | 2024 |
| Broughton Jewish Cassel FOX | Education | 2012 |
| Broughton Local Ltd | Wholesale & retail | 2024 |
| Broughton Park Community Services C.I.C. | Hospitality | 2016 |
| Broughton Park Homes Ltd | Construction | 2021 |
| Broughton Park Investments Ltd | Real estate | 2016 |
| Broughton Park Pharmacy Limited | Wholesale & retail | 2010 |
| Brownlane Limited | Extraterritorial | 2001 |
| Brownwilks Assets (2) Limited | Extraterritorial | 2009 |
| Brownwilks Assets Limited | Extraterritorial | 2009 |
| Brucha Estates Limited | Real estate | 2017 |
| Bruche Estates Limited | Real estate | 2016 |
| Bruk OUT Events Ltd | Arts & recreation | 2025 |
| Bruna Boutique Ltd | Other services | 2024 |
| Brunswick Court (2007) Management Company Limited | Real estate | 2007 |
| Brunswick Estate Company Ltd | Extraterritorial | 2004 |
| Bryse Consulting Ltd | Manufacturing | 2024 |