| Cloudsis Limited | Information & communication | 2014 |
| Clover Legal & Compliance Services Limited | Professional & scientific | 2023 |
| Clover UK Property Limited | Real estate | 2025 |
| CM Media Holdings Ltd | Professional & scientific | 2024 |
| Cognosis Limited | Professional & scientific | 1998 |
| Coley Capital Ltd | Real estate | 2018 |
| Colin Fitzpatrick Productions Ltd | Construction | 1987 |
| COMPLI360 Limited | Financial services | 2018 |
| Conduit Mead Ventures Limited | Financial services | 1925 |
| Connect and Support Technology Limited | Information & communication | 2011 |
| Construction Equipment Events Ltd | Administrative & support | 2011 |
| Conway Business Consulting Limited | Administrative & support | 2011 |
| Corenza Medical Services Limited | Health & social care | 2004 |
| Cornelio Investments Ltd | Real estate | 2018 |
| Corners Property Ltd | Real estate | 2022 |
| Cosy Hauz a Ltd | Professional & scientific | 2022 |
| Cosy Hauz B Ltd | Real estate | 2022 |
| Cosy Hauz C Ltd | Real estate | 2023 |
| Cosy Hauz Capital Ltd | Real estate | 2021 |
| Cosy Hauz Developments Ltd | Construction | 2020 |
| Cosy Hauz E Ltd | Real estate | 2023 |
| Cosy Hauz F Ltd | Real estate | 2023 |
| Cosy Hauz G Ltd | Real estate | 2023 |
| Cosy Hauz Group Ltd | Financial services | 2020 |
| Cosy Hauz H Ltd | Real estate | 2023 |
| Cosy Hauz Investments Ltd | Real estate | 2021 |
| Cosy Hauz Limited | Real estate | 2018 |
| Countfire Limited | Information & communication | 2013 |
| COX and Buckles Workshop Limited | Transport & logistics | 2002 |
| Cradley Limited | Administrative & support | 2003 |
| Cromwell Consultants Limited | Financial services | 2014 |
| Croydon Tamil Welfare Association UK Ltd | Health & social care | 2018 |
| Cuckfield Capital Ltd | Administrative & support | 2022 |
| Culvert Tyres Ltd | Wholesale & retail | 2023 |
| Cupcake Estates Limited | Real estate | 2016 |
| Cysure Limited | Information & communication | 2016 |
| D&B Solutions UK Limited | Administrative & support | 1971 |
| D&R Traders Limited | Wholesale & retail | 2017 |
| Dakin Advisory Ltd | Professional & scientific | 2023 |
| DAN James Elliott Limited | Professional & scientific | 2020 |
| DAN Woodger Illustration Limited | Arts & recreation | 2015 |
| DAP Props Ltd | Real estate | 2018 |
| Darvale Securities Limited | Real estate | 1976 |
| Delta Land and Plans Limited | Real estate | 2022 |
| Develop 55 Ltd | Construction | 2020 |
| Dialogue Enterprises Ltd | Information & communication | 2016 |
| Dinanukht Enterprises Limited | Arts & recreation | 2024 |
| Dklogic Consulting Limited | Information & communication | 2015 |
| Dkpk Properties Limited | Real estate | 2016 |
| Dl&Coms Ltd | Transport & logistics | 2015 |
| Doctor Health Limited | Professional & scientific | 2016 |
| Dolmen Consulting Ltd | Professional & scientific | 2022 |
| Double Stone Steel Europe Ltd | Construction | 2014 |
| Double Stone UK Ltd | Extraterritorial | 2014 |
| DR L X Smith Limited | Construction | 2015 |
| DR Ross Hunter Ltd | Health & social care | 2014 |
| DR Shan Limited | Health & social care | 2019 |
| Drakus Limited | Information & communication | 1988 |
| Dreams Vision Success Ltd | Other services | 2014 |
| Dreamzdata Solutions Limited | Information & communication | 2025 |
| Dresden Green Consultants Limited | Information & communication | 2015 |
| Drives and Controls Event Limited | Administrative & support | 2004 |
| Dryden Road Management Limited | Households | 2019 |
| Ds@Ps Ltd | Wholesale & retail | 2020 |
| DSL2 Services Limited | Extraterritorial | 2023 |
| Ducane SERVICES2 Ltd | Wholesale & retail | 2024 |
| Duet Limited | Professional & scientific | 2012 |
| E & a South London LLP | | 2009 |
| E-Conveyance Ltd | Professional & scientific | 2025 |
| Eagle Harbour Limited | Professional & scientific | 2018 |
| Easy Wheels Ltd | Wholesale & retail | 2021 |
| Econostream Holdings Limited | Financial services | 2021 |
| ED Babar Music Ltd | Information & communication | 2024 |
| Edet Consultancy Ltd | Information & communication | 2015 |
| Edgbarne Securities Limited | Financial services | 1970 |
| Edns Group Limited | Hospitality | 2017 |
| Eilaf Media Services Limited | Information & communication | 2004 |
| Elexis Consulting PVT Ltd | Professional & scientific | 2025 |
| Elizabeth Wightwick Limited | Real estate | 2017 |
| Elliott Wood Consulting Ltd | Financial services | 2013 |
| Elliott Wood Holdings Limited | Professional & scientific | 2015 |
| Elliott Wood Nominees Limited | Extraterritorial | 2015 |
| Elliott Wood Partnership Limited | Professional & scientific | 2015 |
| Ellisons Estate Agents Limited | Real estate | 2011 |
| Emal Limited | Real estate | 1997 |
| Emef Group Construction Ltd | Professional & scientific | 2018 |
| Emerging Payments Limited | Administrative & support | 2005 |
| Emerging Payments Ventures Limited | Professional & scientific | 2008 |
| Engagerfy Ltd | Information & communication | 2022 |
| Enterprise Information & Architectural Solutions Ltd | Information & communication | 2004 |
| Europamagic Ltd | Administrative & support | 2025 |
| European Environmental Monitoring and Consultancy Ltd | Professional & scientific | 2015 |
| Every Home Matters (UK) Limited | Other services | 2014 |
| EVI Solutions Limited | Manufacturing | 2017 |
| Evmi Solutions Limited | Manufacturing | 2017 |
| Expressions DRY Cleaners Limited | Other services | 2010 |
| Extreme Electronics Ltd. | Information & communication | 2012 |
| FA & Co Group Limited | Wholesale & retail | 2019 |
| Faberge Fabrique Limited | Manufacturing | 1994 |
| Fade UP Media Limited | Information & communication | 2018 |