| Bobv Services Ltd | Transport & logistics | 2024 |
| Bogdanauto Ltd | Wholesale & retail | 2024 |
| Bora Services Ltd | Wholesale & retail | 2020 |
| Bosbod Services Ltd | Transport & logistics | 2017 |
| Bounce About Inflatables Ltd | Arts & recreation | 2020 |
| Boyapat Ltd | Administrative & support | 2010 |
| BPR Trading Ltd | Wholesale & retail | 2017 |
| Brait Light Ventures Ltd | Administrative & support | 2022 |
| BRD Express Ltd | Transport & logistics | 2025 |
| Bretwyn Safety Limited | Information & communication | 2026 |
| Briddy Panda Ltd | Transport & logistics | 2025 |
| Brightlawn Limited | Extraterritorial | 2008 |
| Brimsdale Limited | Health & social care | 2015 |
| Britstaff Solutions Ltd | Administrative & support | 2026 |
| Brookhill Support Limited | Administrative & support | 2025 |
| BS Care Management Services Limited | Health & social care | 2017 |
| BSP Trans Ltd | Transport & logistics | 2024 |
| Bstlba Ltd | Wholesale & retail | 2025 |
| Bubba Boutique Essex Ltd | Wholesale & retail | 2025 |
| BUD Traders Ltd | Construction | 2025 |
| Bumel & Associates UK Ltd | Administrative & support | 2014 |
| Bumps to Yummies CIC | Other services | 2023 |
| Bun-N-Blaze Ltd | Hospitality | 2025 |
| Bunon Motors Limited | Wholesale & retail | 2023 |
| Bunz & Bite Ltd | Hospitality | 2025 |
| Burj Brickwork Ltd | Construction | 2024 |
| Buzz Taxi Ltd | Transport & logistics | 2026 |
| C-New AGE Ltd | Health & social care | 2025 |
| Caigtransport Ltd | Transport & logistics | 2020 |
| Calcutta Food and Wine Ltd | Wholesale & retail | 2023 |
| Callup 24/7 Limited | Information & communication | 2017 |
| Calpus Media Limited | Administrative & support | 2019 |
| Cambriel Services Limited | Health & social care | 2022 |
| Campus Care Limited | Administrative & support | 2014 |
| Candoo Multi-Trade Services Limited | Construction | 2016 |
| Capital Bodyworks Ltd Ltd | Wholesale & retail | 2026 |
| Capstan Green Projects Limited | Construction | 2016 |
| Capstan Group Services Limited | Construction | 2016 |
| Care Lynx PDF Ltd | Administrative & support | 2026 |
| Caretis Property Group Ltd | Households | 2026 |
| Cassius & Nina Ltd | Transport & logistics | 2014 |
| Caty&Casy Ltd | Transport & logistics | 2016 |
| CC Construction Consultancy Limited | Construction | 2025 |
| Cedars Company Expert Limited | Public administration | 2024 |
| Cedars Theatre Professional Limited | Extraterritorial | 2012 |
| Cezar Stefan Trans Ltd | Transport & logistics | 2019 |
| CGI Installing Ltd | Construction | 2018 |
| Chadtv Ltd | Information & communication | 2022 |
| Chartvision Ltd | Financial services | 2026 |
| Chillax Guys Ltd | Wholesale & retail | 2024 |
| Chizzy Ltd | Construction | 2019 |
| Chococ Limited | Health & social care | 2022 |
| Chohdahry Ltd | Transport & logistics | 2019 |
| Chosen BC CIC | Health & social care | 2020 |
| Chow Traders Limited | Wholesale & retail | 2019 |
| Christ Gospel Assembly | Other services | 2013 |
| Chymaker Care Services Limited | Health & social care | 2025 |
| CIA Construction Limited | Construction | 2014 |
| Cinematch Limited | Administrative & support | 2019 |
| Citywide Couriers Limited | Transport & logistics | 2016 |
| CJ Estate Agents Ltd | Real estate | 2024 |
| CJ Letting Agents Ltd | Households | 2026 |
| Class A1 Ltd | Other services | 2020 |
| Claucris Ltd | Transport & logistics | 2013 |
| CLB Refrigeration Ltd | Manufacturing | 2004 |
| Clean Living Cleaning Service Limited | Other services | 2025 |
| Clear Wall Solutions Ltd | Construction | 2023 |
| Clothes Relief Limited | Wholesale & retail | 2005 |
| Cloud Asgard Limited | Information & communication | 2014 |
| CMA Transport Ltd | Transport & logistics | 2022 |
| CMB Trans Ltd | Transport & logistics | 2021 |
| CMC Building Limited | Construction | 2024 |
| CN &M Ltd | Transport & logistics | 2020 |
| Coalhouse Point Music Limited | Information & communication | 2023 |
| Cockney Productions Limited | Arts & recreation | 2014 |
| Codobelcu Trans Ltd | Transport & logistics | 2025 |
| Colestone Property Management Limited | Real estate | 2012 |
| Community Sound CIC | Education | 2022 |
| Compass Forest Products Limited | Wholesale & retail | 1985 |
| Compecons Ltd | Information & communication | 2026 |
| Compendious Ltd | Information & communication | 2025 |
| Confido Logistics Services Ltd | Transport & logistics | 2022 |
| Confii Ltd | Wholesale & retail | 2024 |
| Consolidated Timber Holdings Group Limited | Professional & scientific | 2017 |
| Consolidated Timber Holdings Limited | Professional & scientific | 1988 |
| Construction Security Design Ltd | Construction | 2024 |
| CONTAINERS4SALE UK Ltd | Transport & logistics | 2008 |
| CONTAINERS4STORAGE Ltd | Transport & logistics | 2022 |
| Conte Trans Ltd | Transport & logistics | 2021 |
| Continental Xpress Ltd | Wholesale & retail | 2025 |
| Coral Logistics Ltd | Transport & logistics | 2017 |
| Coraxe Developments Ltd | Construction | 2023 |
| Coraxe Short Lets Ltd | Real estate | 2026 |
| Coraxe Short Stays Ltd | Real estate | 2023 |
| Coregency Properties Limited | Real estate | 2020 |
| Corran Haulage Limited | Wholesale & retail | 2022 |
| CP Utilities Limited | Energy | 2024 |
| Cpcw Ltd | Construction | 2023 |
| CRA Transport Ltd | Transport & logistics | 2017 |
| Crown Auto Hubb Ltd | Manufacturing | 2023 |