| Brown Shuga Books Ltd | Wholesale & retail | 2022 |
| Brummins Limited | Construction | 2018 |
| Bsanalysis Limited | Professional & scientific | 2025 |
| Bslcleaners Ltd | Administrative & support | 2025 |
| Btgain Limited | Wholesale & retail | 2020 |
| Buds of MAY Ltd | Wholesale & retail | 2017 |
| Builder Team Limited | Construction | 2020 |
| Buildtech & Joinery Ltd | Construction | 2023 |
| Buki Finance Limited | Financial services | 2014 |
| Bukola Kassim Business Company Ltd | Health & social care | 2018 |
| Bunduc Trans Ltd | Transport & logistics | 2018 |
| Buneto Healthcare Ltd | Health & social care | 2018 |
| Bunting Care Ltd | Transport & logistics | 2022 |
| Business Creative Accountant Ltd | Professional & scientific | 2023 |
| Business Creative Solutions Ltd | Professional & scientific | 2013 |
| Business Information Systems Consulting Limited | Information & communication | 2013 |
| Business Telecom Provider Limited | Administrative & support | 2026 |
| Buton Domestic Cleaning Limited | Administrative & support | 2015 |
| Buton Limited | Administrative & support | 2013 |
| Butterfly Yacht Charters Limited | Administrative & support | 2006 |
| Buxton + Mcnulty Mechanical Services (2012) Limited | Financial services | 2012 |
| Buxton + Mcnulty Mechanical Services Limited | Energy | 2005 |
| Buxton + Mcnulty Properties Limited | Real estate | 2012 |
| Buy Point Limited | Wholesale & retail | 2021 |
| Buzzword (UK) Limited | Administrative & support | 2000 |
| B’Licious Services Limited | Hospitality | 2021 |
| C & G Heating & Plumbing Supplies Ltd | Wholesale & retail | 2004 |
| C & K Global Supplies Ltd | Wholesale & retail | 2025 |
| C & O Property Holding Limited | Real estate | 2021 |
| C K D Minimarket Limited | Wholesale & retail | 2012 |
| C-C World Letting Company Ltd | Real estate | 2020 |
| C. Stroud Building Services Ltd | Construction | 2018 |
| C.K Design Ltd | Professional & scientific | 2022 |
| C.M.Beazer Ltd | Construction | 2015 |
| C.R Lifting Solutions Ltd | Administrative & support | 2021 |
| C4 Cargo Ltd | Transport & logistics | 2020 |
| CA Revenue Solutions Ltd | Professional & scientific | 2026 |
| Caddock Brothers Survey Equipment Limited | Construction | 2002 |
| Caelum Films Limited | Arts & recreation | 2019 |
| Cafeology Cafe Ltd | Hospitality | 2025 |
| Cake House Chatham Ltd | Wholesale & retail | 2022 |
| Cakeology London Ltd | Manufacturing | 2024 |
| Calimantana Limited | Financial services | 2024 |
| Calistenics Panda Limited | Hospitality | 2023 |
| Calligency Inc. Limited | Real estate | 2013 |
| Calm Investment and Property Limited | Real estate | 2007 |
| Cameron Capital Ltd | Real estate | 2017 |
| Canelink Ltd | Wholesale & retail | 2022 |
| Capetune Limited | Wholesale & retail | 2009 |
| Capital FM Services Ltd | Construction | 2021 |
| Capital Healthcare Management Services Limited | Education | 2016 |
| Capital Hoist Hire and Sales Limited | Construction | 2016 |
| Caprioso Construction Ltd | Administrative & support | 2025 |
| Capworth Enterprise Limited | Education | 2017 |
| Caracona Limited | Wholesale & retail | 2021 |
| Caramel Health Limited | Public administration | 2020 |
| Carbon Creative Car Parts Ltd | Manufacturing | 2018 |
| Cardinal Care Solutions Ltd | Health & social care | 2025 |
| Care Marvels Limited | Health & social care | 2023 |
| Carecrew Group Limited | Hospitality | 2020 |
| Careeranchor Consulting Ltd | Information & communication | 2020 |
| Carefocal Homes Ltd | Health & social care | 2024 |
| Carefocal Ltd | Health & social care | 2019 |
| Carers 4 U Ltd | Health & social care | 2009 |
| Cargo Respect Ltd | Transport & logistics | 2023 |
| Caribi Investments Limited | Financial services | 2016 |
| Caring Hands Healthcare Ltd | Health & social care | 2024 |
| Carts & Carriages Limited | Transport & logistics | 1982 |
| Casey O'Gorman Racing Limited | Arts & recreation | 2026 |
| Casey Pettit Coaching Academy Limited | Arts & recreation | 2020 |
| Casiq Solutions Limited | Administrative & support | 2014 |
| Cass Site Services Ltd | Administrative & support | 2015 |
| Catering and Refrigeration Specialists Ltd | Manufacturing | 2024 |
| Cbees Home & Property Ltd | Real estate | 2025 |
| Cbees Services Ltd | Transport & logistics | 2015 |
| Cecil Sercives Limited | Health & social care | 2023 |
| Cedar Dental Group Limited | Health & social care | 2026 |
| Cedar Made Ltd | Professional & scientific | 2019 |
| Celestial Church of Christ Erith Parish Limited | Other services | 2020 |
| Cemilia Signalling Limited | Construction | 2023 |
| Centifolia Ltd | Professional & scientific | 2020 |
| Centurion Warranties Limited | Administrative & support | 2013 |
| Cerade Ltd | Wholesale & retail | 2022 |
| Ceries Technology Limited | Information & communication | 2003 |
| Certified SIA Training Ltd | Education | 2025 |
| CG Construction Services Ltd | Construction | 2021 |
| CG Dartford Ltd | Manufacturing | 2026 |
| CGM Electrical Contracts Ltd | Construction | 2019 |
| Chabod Consultancy Limited | Professional & scientific | 2014 |
| Chahal Drylining Ltd | Construction | 2016 |
| Chahal Saab Drylining Ltd | Construction | 2023 |
| Champion Care Services Limited | Health & social care | 2023 |
| Champion Kids Nursery UK Ltd | Education | 2021 |
| Change Positions Ltd | Administrative & support | 2019 |
| Chapel of Praise | Other services | 2004 |
| Chapel Plant Ltd | Wholesale & retail | 2019 |
| Chapter Oils Limited | Professional & scientific | 1995 |
| Charles Plastering & Mouldings Ltd | Construction | 2011 |
| Chemroal Ltd | Transport & logistics | 2015 |
| Cherie Amour Limited | Hospitality | 2005 |