| Attrell Interiors Limited | Administrative & support | 2014 |
| AU Corporate Holdings Limited | Financial services | 2024 |
| AU Corporate Investments Limited | Financial services | 2025 |
| Aurora Property Investors Ltd | Construction | 2024 |
| Austin Newstead Racing Ltd | Arts & recreation | 2024 |
| Auto Locksmiths London Limited | Other services | 2011 |
| Aves Construction Management Ltd | Construction | 2018 |
| Avictus Limited | Other services | 2019 |
| Avitas Global Ltd | Administrative & support | 2009 |
| Azur Property Ventures Limited | Real estate | 2023 |
| B. M. Wine Agencies Limited | Wholesale & retail | 2002 |
| Baker Properties (Manchester) Ltd | Real estate | 2023 |
| Baldslow Estates Ltd | Construction | 2025 |
| Ballyglass Property Management LLP | | 2023 |
| Barham Carpentry & Construction Ltd | Construction | 2016 |
| Baroque Creative Wood and Metal Ltd | Manufacturing | 2018 |
| Basingstoke Properties LLP | | 2019 |
| Bayith Ltd | Construction | 2020 |
| BDM Medical Limited | Health & social care | 2014 |
| Beauty at the Vinery Limited | Other services | 2005 |
| Bell Brook Properties Ltd | Extraterritorial | 2004 |
| Bella Wine Bar Ltd | Hospitality | 2024 |
| Belle Software Ltd | Information & communication | 2015 |
| Benatal UK Limited | Real estate | 2004 |
| Beson Investment Limited | Real estate | 2021 |
| Besos Property Management LLP | | 2021 |
| Bespoke Health Plans Limited | Financial services | 2014 |
| Bexhill Famous Ltd | Hospitality | 2025 |
| Bhatia Sons & Daughters Ltd | Real estate | 2024 |
| BHI North East Ltd | Hospitality | 2026 |
| Big Fish Energy Limited | Real estate | 2023 |
| Blackwell Capital Ltd | Financial services | 2026 |
| Blackwood Associates Investments Limited | Wholesale & retail | 2016 |
| Blincker Limited | Professional & scientific | 2009 |
| BLU Print Consulting Services Limited | Professional & scientific | 2023 |
| Blue Rock Invest Limited | Extraterritorial | 2017 |
| Blue Spire Harman LLP | | 2022 |
| Blue Spire Properties Ltd | Real estate | 2018 |
| Blue T L J LLP | | 2020 |
| Bluestone Industries Ltd | Wholesale & retail | 2009 |
| BN Gauci Consultancy Limited | Extraterritorial | 2015 |
| Bond Freeholds Ltd | Real estate | 2023 |
| Bond Properties and Investments Ltd | Real estate | 2017 |
| Bonjour Cafe Limited | Hospitality | 2018 |
| Bonny Estates Ltd | Real estate | 2021 |
| Bonny Estates Property Ltd | Real estate | 2024 |
| Boser Group Limited | Real estate | 2026 |
| Bows Events Limited | Wholesale & retail | 2010 |
| Bows Hire Ltd | Other services | 2007 |
| Brain Boost (GB) Ltd | Education | 2011 |
| Branch OUT Infrastructure Services Limited | Administrative & support | 2009 |
| Brick & Pave Construction Ltd | Construction | 2025 |
| Bridges EA Group Limited | Professional & scientific | 2021 |
| Bridges Holdings Ltd | Professional & scientific | 2018 |
| Brightburn Systems Limited | Wholesale & retail | 2026 |
| Brighton Property Partners Limited | Real estate | 2015 |
| Brilliana Senior LLP | | 2020 |
| Bristow Property Management LLP | | 2017 |
| Bristow Real Estate Management Ltd | Real estate | 2019 |
| Brookes Ventures LLP | | 2021 |
| Bruleen LLP | | 2018 |
| BTL Tonbridge Ltd | Real estate | 2015 |
| Buena Quinta UK Limited | Real estate | 2004 |
| Built by Novo Crossfit Ltd | Arts & recreation | 2016 |
| Bungaroosh Holdings Ltd | Real estate | 2020 |
| Bungaroosh LLP | | 2018 |
| Burson Ltd | Real estate | 2024 |
| C & S ST Helens Properties Limited | Real estate | 2001 |
| C Bentley Services Ltd | Information & communication | 2021 |
| C D Earl Limited | Construction | 2013 |
| C H Plumbing Services Ltd | Construction | 2025 |
| C Jones & Sons Limited | Construction | 2015 |
| C L Ideas Limited | Arts & recreation | 2005 |
| C.G.S. Projects Limited | Construction | 2016 |
| CAD CAM Studio Ltd | Manufacturing | 2025 |
| Caine Electrical Limited | Construction | 2016 |
| Calma Services Ltd | Administrative & support | 2023 |
| Calora Consulting Limited | Information & communication | 2004 |
| Campkin Gardens (NO.2) Limited | Extraterritorial | 2017 |
| Campkin Gardens Management Limited | Extraterritorial | 2015 |
| Candycorn Ltd | Professional & scientific | 2023 |
| Capilon Group Ltd | Financial services | 2024 |
| Capilon Investments LLP | | 2022 |
| Capilon Investments WT LLP | | 2024 |
| Capilon OPS Ltd | Professional & scientific | 2022 |
| Capilon OPS WT 2 Ltd | Professional & scientific | 2024 |
| Capilon OPS WT Ltd | Professional & scientific | 2024 |
| Capilon Props Ltd | Financial services | 2022 |
| Capilon Props WT Ltd | Financial services | 2024 |
| Capilon Syndicate WT LLP | | 2024 |
| Caravan Guide Limited | Administrative & support | 2026 |
| Care Careers Limited | Education | 2015 |
| Carl & Karen Farrow Property Limited | Real estate | 2015 |
| Carlson Associates Limited | Professional & scientific | 2008 |
| Casita Developments Limited | Real estate | 2018 |
| Catharine Brown Limited | Information & communication | 2015 |
| CEL Mates Partners LLP | | 2023 |
| Charles and Charles Holdings Limited | Financial services | 2024 |
| Charmaison Limited | Real estate | 2017 |
| Charmant Ltd | Real estate | 2024 |