| ASK 4 Beauty Ltd | Other services | 2017 |
| Aspire Independent Financial Planners LLP | | 2006 |
| ASR Equities Limited | Real estate | 2016 |
| Assam Finance Limited | Financial services | 2015 |
| Association for Qualitative Research Limited | Other services | 1990 |
| Assured Guardians Limited | Extraterritorial | 2015 |
| Astrojet Limited | Administrative & support | 2000 |
| Atlas Industries (UK) Limited | Professional & scientific | 2005 |
| AU84 Fast Food Limited | Hospitality | 2019 |
| Avenue House Estate Trust | Administrative & support | 2000 |
| Avenue One London Limited | Real estate | 2024 |
| AX Harrow Limited | Other services | 2012 |
| B & G Marketing Limited | Administrative & support | 2012 |
| B-Wise Ltd | Professional & scientific | 2017 |
| B.M. Samuels Finance Group Ltd | Financial services | 1972 |
| B.M.Samuels Ltd | Financial services | 1965 |
| B2B Italy Limited | Administrative & support | 2011 |
| Bac-Nor Limited | Construction | 2024 |
| Bacb Investments Limited | Financial services | 2023 |
| Badicom INT Limited | Information & communication | 2015 |
| Bafima Limited | Water & waste | 2014 |
| Bags of Ideas Limited | Extraterritorial | 2014 |
| Bailey Media Ltd | Other services | 2017 |
| Bannaga and Fadlabi Ltd | Professional & scientific | 2026 |
| Bare to Bold Ltd | Administrative & support | 2016 |
| Barnstaple Developments Limited | Construction | 2016 |
| Barnymaroo Limited | Hospitality | 2002 |
| Baron Property Consultants Limited | Construction | 2002 |
| Barrera Catering Limited | Hospitality | 2018 |
| Base Care Foundation Ltd | Public administration | 2020 |
| Beacon Trading (UK) Limited | Administrative & support | 2009 |
| Beam Calculation Ltd | Professional & scientific | 2016 |
| Beck Group Limited | Professional & scientific | 2003 |
| Beck Interiors Holdings Limited | Extraterritorial | 2003 |
| Beck Interiors International Limited | Construction | 2000 |
| Beck MBI 2 Limited | Professional & scientific | 2015 |
| Beck MBI Limited | Construction | 2007 |
| Behi (UK) Limited | Professional & scientific | 2010 |
| Behi Limited | Professional & scientific | 2010 |
| Berkeley Finch Limited | Professional & scientific | 2012 |
| Beyond Consulting VEM Ltd | Professional & scientific | 2016 |
| Bigbroz Publishing Ltd | Information & communication | 2006 |
| Binary Vision Limited | Information & communication | 1985 |
| Bingol Genc Limited | Hospitality | 2016 |
| BKL Wealth Management Limited | Financial services | 2013 |
| Blok Limited | Wholesale & retail | 2008 |
| Bloxham Limited | Construction | 1988 |
| Blue Alpine Trading Limited | Real estate | 2018 |
| Blueacre Properties Ltd | Real estate | 2020 |
| Bluebell Pronto Limited | Hospitality | 2018 |
| Bluebird Global Limited | Wholesale & retail | 2012 |
| Bluecroft (London) Ltd | Administrative & support | 1997 |
| Bluecroft Land Limited | Construction | 2021 |
| Bluecroft Property Ventures Limited | Financial services | 2018 |
| BOK Brighton 2 Ltd | Hospitality | 2016 |
| Boral Technologies Limited | Professional & scientific | 2000 |
| Bosphoros Caterers (Holdings) Limited | Hospitality | 1978 |
| Boudreaux Chefs Ltd | Hospitality | 2019 |
| Brackenridge Holdings Limited | Health & social care | 2026 |
| Brightstar FW Direct Ltd | Wholesale & retail | 2024 |
| Brisden Properties Limited | Construction | 1950 |
| Bristant Investments Limited | Households | 1965 |
| Broadoak Kent Limited | Real estate | 2021 |
| Bromberg Dental LAB Ltd | Health & social care | 2017 |
| Brosaf Holdings Limited | Real estate | 1998 |
| Bsynergetic Ltd | Other services | 2019 |
| Butteland Ltd | Information & communication | 2013 |
| C Nixon & Partners LLP | | 2008 |
| Candia Properties Limited | Real estate | 2002 |
| Caragh Properties Limited | Real estate | 2011 |
| Cardinal Environment Limited | Professional & scientific | 1997 |
| Carrott App Limited | Information & communication | 2019 |
| Cavendish Homes (Hillview) Limited | Construction | 2021 |
| Cazenove Printers Limited | Manufacturing | 2010 |
| CC Britain Limited | Wholesale & retail | 2025 |
| Cedar Trellis Limited | Administrative & support | 2023 |
| Cedek Properties Limited | Construction | 1987 |
| CEM and CEM Limited | Hospitality | 2019 |
| Centennial Healthcare Ltd | Health & social care | 2012 |
| Centre for Advanced Medical Education and Training Ltd | Education | 2015 |
| Chagbros Limited | Financial services | 2023 |
| Chartlink Limited | Health & social care | 2022 |
| Citi & Farm Limited | Real estate | 2020 |
| City West Investors Ltd. | Financial services | 2003 |
| Class J Electronics Limited | Manufacturing | 2011 |
| Clear Saving Solutions Limited | Other services | 2015 |
| Cloudcross Limited | Construction | 1984 |
| Club ROW Warehouses Limited | Wholesale & retail | 1974 |
| Coleman Bros. (Cheshunt) Limited | Real estate | 1994 |
| Comic Art Limited | Arts & recreation | 2003 |
| Commonwealth College of Excellence Ltd | Education | 1987 |
| Community Health and Development Foundation | Health & social care | 2013 |
| Composites Builds Landscapes Ltd | Construction | 2019 |
| Constantijn Van B Limited | Professional & scientific | 2014 |
| Consultancy and Project Management Services Limited | Administrative & support | 2006 |
| Contractor Accommodation Services Limited | Hospitality | 2007 |
| Converse Marketing Ltd | Other services | 2015 |
| Corbetts Hill Farm Limited | Real estate | 2017 |
| Cornerstone Estates (UK) Limited | Construction | 2002 |
| Cornerstone Holdings LLP | | 2007 |