| Bushra Ltd | Wholesale & retail | 2021 |
| Bushra Properties Limited | Real estate | 2026 |
| Butler BOB Ltd | Administrative & support | 2026 |
| Buttercup Boutique Limited | Wholesale & retail | 2025 |
| Butterflies and Rainbows Ltd | Wholesale & retail | 2024 |
| Butts News Food & Wine Limited | Wholesale & retail | 2016 |
| Buy Laza Limited | Wholesale & retail | 2025 |
| Buyaz Ltd | Wholesale & retail | 2026 |
| Buzz and Bytes Uxbridge Ltd | Wholesale & retail | 2025 |
| BV Emerald Ltd | Real estate | 2026 |
| BV Store Ltd | Wholesale & retail | 2023 |
| BWS 1972 Ltd | Construction | 2022 |
| BYD Projects Ltd | Construction | 2024 |
| C Hairdressers Ltd | Other services | 2020 |
| C J Arts Ltd | Wholesale & retail | 2019 |
| C MAK Services Limited | Wholesale & retail | 2018 |
| C Mark Ltd | Manufacturing | 2021 |
| C R Courier Experts Ltd | Transport & logistics | 2019 |
| C Windscreen Ltd | Wholesale & retail | 2020 |
| C&M Construction (London) Ltd | Construction | 2014 |
| C&S Heating and Construction Limited | Construction | 2024 |
| C&Z Estates Ltd | Real estate | 2026 |
| C1 Builders Ltd | Professional & scientific | 2017 |
| C13 Trades Limited | Wholesale & retail | 2022 |
| Cadogan Advisory Ltd | Information & communication | 2021 |
| Caffe Adda Ltd | Hospitality | 2026 |
| Cahoot Consulting Limited | Professional & scientific | 2014 |
| Cake House Southall Ltd | Wholesale & retail | 2021 |
| Cakeabite Ltd | Manufacturing | 2025 |
| Cakeco Ltd | Hospitality | 2009 |
| Calota Ltd | Information & communication | 2024 |
| Calvin Thomas Limited | Other services | 2022 |
| Cambridge Hire Cars Ltd | Wholesale & retail | 2026 |
| Camden Merchants Limited | Wholesale & retail | 2026 |
| Can'T Whistle Ltd | Professional & scientific | 2018 |
| Canagasundaram Limited | Construction | 2019 |
| Canalside Investment Ltd | Real estate | 2024 |
| Canary Enterprise Ltd | Wholesale & retail | 2014 |
| Canvas Glam Perfumes & Cosmetics Ltd | Wholesale & retail | 2026 |
| Capathon Capital Ltd | Financial services | 2018 |
| Capital Assets and Estates Ltd | Real estate | 2025 |
| Capital Courier Services Ltd | Transport & logistics | 2016 |
| Capital Developers Limited | Real estate | 2022 |
| Capital Future Property Ltd | Real estate | 2022 |
| Capital GAS Ltd | Professional & scientific | 2016 |
| Capital Guard Investments Limited | Financial services | 2023 |
| Capital Infra Limited | Wholesale & retail | 2025 |
| Capital Marketing Services Ltd | Other services | 2024 |
| Capital Scaffolding Company Ltd | Construction | 2026 |
| Capital Wealth Asset Management Limited | Real estate | 2014 |
| Capital Wealth Property Development Limited | Construction | 2017 |
| Capital Wealth Property Management Ltd | Real estate | 2015 |
| Capitalenterprizes Ltd | Wholesale & retail | 2021 |
| Capswood Limited | Real estate | 2017 |
| Captain Hayes Limited | Real estate | 2023 |
| Car Capital Ltd | Wholesale & retail | 2016 |
| Car Care Products Ltd | Manufacturing | 2026 |
| Car Club MOT Ltd | Wholesale & retail | 2023 |
| Car Club Property Ltd | Administrative & support | 2024 |
| Car Protect Solutions Ltd | Professional & scientific | 2026 |
| Car Styling Direct Ltd | Wholesale & retail | 2024 |
| Car Superway Ltd | Wholesale & retail | 2023 |
| Caramel Services Ltd | Professional & scientific | 2022 |
| Cardinal 4 Digital Ltd | Professional & scientific | 2021 |
| Cardinal Construction Ltd | Construction | 2016 |
| Care 2 Smile 1 Ltd | Administrative & support | 2026 |
| Care 2 Smile 2 Ltd | Administrative & support | 2026 |
| Care 2 Smile 3 Ltd | Administrative & support | 2026 |
| Care 2 Smile Ltd | Administrative & support | 2023 |
| Care Beside YOU Ltd | Health & social care | 2023 |
| Care Besides YOU Ltd | Health & social care | 2025 |
| Care Dental Ltd | Health & social care | 2006 |
| Careclean 2000 Limited | Other services | 1999 |
| Career Creators Ltd | Education | 2025 |
| Cargo Freight Brokers Ltd | Transport & logistics | 2025 |
| Cargo Transportation Logistics Limited | Wholesale & retail | 1997 |
| Caritas DEI Limited | Health & social care | 2019 |
| Carp & Trout Limited | Hospitality | 2010 |
| Carpet Express Wholesale UK Ltd | Wholesale & retail | 2018 |
| CARPET7DAY Ltd | Wholesale & retail | 2025 |
| Carpets Wala Limited | Wholesale & retail | 2020 |
| Carriston Mercantile Limited | Wholesale & retail | 2024 |
| Cars and Repairs Ltd | Wholesale & retail | 2025 |
| CARSALES0786 Limited | Wholesale & retail | 2019 |
| Cartel Investment Properties Limited | Real estate | 2000 |
| Caryl Ltd | Wholesale & retail | 2026 |
| CARZONE4U Ltd | Wholesale & retail | 2026 |
| Casa 181 Ltd | Real estate | 2025 |
| Casa Collective Group Ltd | Real estate | 2025 |
| Casa Dell' Impasto Limited | Hospitality | 2023 |
| Casa Imperial Ltd | Wholesale & retail | 2025 |
| Casas Mallorca Limited | Real estate | 2025 |
| Casavros Ltd | Wholesale & retail | 2022 |
| Casey & Kezia Ltd | Health & social care | 2017 |
| Cash Management Expertise Limited | Financial services | 2026 |
| Castle Kickers Ltd | Arts & recreation | 2025 |
| Cathedral Services Ltd | Construction | 2018 |
| Catwalk Fashion London Ltd | Wholesale & retail | 2021 |
| CBL Trading Limited | Extraterritorial | 2014 |
| CC Dream Events Ltd | Hospitality | 2025 |