| Britalia Restaurant Limited | Hospitality | 2025 |
| Britannia Asset Funding LLP | | 2017 |
| Britbunch Limited | Wholesale & retail | 2025 |
| Britique Radiant Limited | Wholesale & retail | 2024 |
| Britt Cars Ltd | Wholesale & retail | 2015 |
| Brixham Ship Agency Services Limited | Administrative & support | 2021 |
| Brixia Marine Ltd | Professional & scientific | 2026 |
| Broad Data Networks Ltd. | Information & communication | 2017 |
| Broadreach Developments Ltd | Real estate | 2006 |
| Brola Construction Limited | Professional & scientific | 2019 |
| Brola Property Management Limited | Real estate | 2021 |
| Brookhill Place Ltd | Professional & scientific | 2022 |
| Brooklynaccounts&Co Limited | Professional & scientific | 2025 |
| Bros Project Ltd | Construction | 2018 |
| Brothers VEG Ltd | Wholesale & retail | 2022 |
| Brougham & Carlson Limited | Wholesale & retail | 2012 |
| Brown Assets Limited | Real estate | 2018 |
| Brown Builders UK Ltd | Construction | 2019 |
| BRT Properties (Kent) Limited | Real estate | 2013 |
| Bruce Brickwork Services Ltd | Construction | 2017 |
| Bruddaz Limited | Hospitality | 2019 |
| Bryant Road Fish & Grill Limited | Hospitality | 2023 |
| BS (Global) Limited | Information & communication | 2015 |
| BS Concrete Ltd | Construction | 2024 |
| BS Dining Limited | Hospitality | 2024 |
| BS4 Limited | Construction | 2015 |
| Bsafe Consultancy Limited | Professional & scientific | 2010 |
| Bsafe Holdings Ltd | Real estate | 2017 |
| BSB Capital Limited | Construction | 2024 |
| BSD Drinks Limited | Wholesale & retail | 2026 |
| BSK Heating UK Limited | Construction | 2015 |
| BSK Holdings Limited | Real estate | 2024 |
| BSK Scaffolding Ltd | Construction | 2018 |
| Bted Ltd | Wholesale & retail | 2025 |
| Bths Investment Limited | Administrative & support | 2025 |
| BTL Education Ltd | Administrative & support | 2026 |
| Bubbles Care Limited | Health & social care | 2020 |
| Bubbles Launderette (Sittingbourne) Limited | Other services | 2024 |
| Build & Renovate Ltd | Construction | 2025 |
| Build and Civils Ltd | Construction | 2018 |
| Build Bloc (Kent) Limited | Extraterritorial | 2013 |
| Build Bloc Limited | Manufacturing | 2017 |
| Build. Innovate. Grow. 7 Ltd | Construction | 2018 |
| Builders Club Kent Ltd | Wholesale & retail | 2016 |
| Builders for ME Limited | Construction | 2023 |
| Building Efficiency Testing Ltd | Professional & scientific | 2023 |
| Building Your Future Limited | Information & communication | 2010 |
| Bulford Court Management Limited | Households | 2018 |
| Bulks Gym Ltd | Arts & recreation | 2009 |
| Bull Close Management Company Limited | Households | 1994 |
| Bull Lane Garage Limited | Wholesale & retail | 2007 |
| Bulster Ltd | Information & communication | 2025 |
| Bungaylocal Limited | Wholesale & retail | 2023 |
| Bunkall & Reynolds Interiors Ltd | Manufacturing | 2021 |
| Burch Freehold Ltd | Real estate | 2015 |
| Burch Road 1965 Limited | Extraterritorial | 2014 |
| Burch Road Property Management Limited | Households | 2013 |
| Burger-In-Law Ltd | Hospitality | 2021 |
| Burghfield Property Investments Ltd | Real estate | 2018 |
| Burndale Home Improvements Limited | Construction | 2010 |
| Burnett OIL & Heating Services Limited | Construction | 2014 |
| Burridge Asphalt Consultancy and Services Ltd | Construction | 2019 |
| Bush Engineering Services Limited | Manufacturing | 1992 |
| Business Tech Consulting Ltd | Information & communication | 2022 |
| Busy AS Bees Nursery Ltd | Education | 2019 |
| Butchers Arms Yeovil Limited | Hospitality | 2026 |
| Butchers Gravesend Ltd | Wholesale & retail | 2025 |
| Butchers of Gravesend Ltd | Wholesale & retail | 2025 |
| Buzi Construction Ltd | Construction | 2015 |
| BW Tech Limited | Information & communication | 2016 |
| Bwjw Limited | Wholesale & retail | 2019 |
| BY Sword & Musket Limited | Other services | 2016 |
| Bysimbi Ltd | Other services | 2025 |
| Bytikare Ltd | Professional & scientific | 2025 |
| Bōka Nails Ltd | Wholesale & retail | 2025 |
| C & C Leasehold Ltd | Real estate | 2025 |
| C & C Living Ltd | Real estate | 2025 |
| C & M (London) Contractors Ltd | Construction | 2016 |
| C a Vision Limited | Other services | 2008 |
| C a Welsh PUB Company Ltd | Hospitality | 2026 |
| C Border Estates Limited | Real estate | 2025 |
| C S C Carpentry Limited | Construction | 2018 |
| C S Services (Kent) Limited | Administrative & support | 2012 |
| C W Leach Limited | Construction | 2002 |
| C&A Trans Ltd | Transport & logistics | 2016 |
| C&C Drylining Ltd | Construction | 2023 |
| C&D Home Letting Ltd | Real estate | 2022 |
| C&I&M Ltd | Transport & logistics | 2018 |
| C&O Investments Group Ltd | Agriculture & fishing | 2020 |
| C&R Motor Repairs Ltd | Wholesale & retail | 2025 |
| C&S Exclusive Care Ltd | Health & social care | 2021 |
| C. John Lawson Limited | Real estate | 2021 |
| C.A. Allans Limited | Construction | 2018 |
| C.C. Valeting Limited | Wholesale & retail | 2002 |
| C.E.E. Global Resources Limited | Health & social care | 2015 |
| C.Russell Accounting Ltd | Professional & scientific | 2012 |
| C.T. Builders Limited | Construction | 2001 |
| C2 Group Ltd | Administrative & support | 2014 |
| CA Logistic Ltd | Transport & logistics | 2018 |
| Cabrielle Ltd | Administrative & support | 2019 |