| CUT Make Trim Ltd | Extraterritorial | 2013 |
| Cute Fruit Ltd | Information & communication | 2023 |
| Cutwaters Ltd | Information & communication | 2022 |
| CV Nails & Beauty Ltd | Other services | 2026 |
| CV Screen Ltd. | Administrative & support | 2000 |
| Cvaa Limited | Transport & logistics | 2025 |
| Cverde Consulting Ltd | Administrative & support | 2007 |
| Cvhc Ltd | Wholesale & retail | 2022 |
| Cwcleaners Limited | Administrative & support | 2025 |
| Cwhitely Coaching Ltd | Professional & scientific | 2023 |
| Cwmcelyn Property Limited | Real estate | 2021 |
| Cws-Bocco Ltd | Transport & logistics | 2019 |
| CX4 Limited | Professional & scientific | 2002 |
| Cyan Creative Ltd | Information & communication | 2021 |
| Cyber Autos Limited | Wholesale & retail | 2015 |
| Cyber Improvements Limited | Information & communication | 2024 |
| Cyber Systems International Limited | Information & communication | 2022 |
| Cybergen Limited | Information & communication | 2001 |
| Cyberhelm Limited | Information & communication | 2026 |
| Cybernetic Defence Ltd | Information & communication | 2023 |
| Cybernetron Ltd | Information & communication | 2022 |
| Cyberpace Limited | Information & communication | 2010 |
| Cyberstorm UK Ltd | Wholesale & retail | 2012 |
| Cybersync Ltd | Information & communication | 2024 |
| Cybronex Limited | Information & communication | 2026 |
| Cycle Check Limited | Information & communication | 2026 |
| Cygnet Energy Limited | Wholesale & retail | 2020 |
| Cygnet Infotech Limited | Information & communication | 2019 |
| Cygnit Solution Ltd | Information & communication | 2023 |
| Cynergyx Group Ltd | Financial services | 2025 |
| Cynmel Properties Limited | Real estate | 2018 |
| Cyno Dogs Ltd | Agriculture & fishing | 2021 |
| Cynosure UK Ltd | Wholesale & retail | 1999 |
| Cyprasa Holdings Limited | Real estate | 2019 |
| Cyrock Entertainment Ltd | Financial services | 2019 |
| Cyrus Entertainment Limited | Information & communication | 2026 |
| D & B 7 Limited | Wholesale & retail | 2007 |
| D & G Master Builders Limited | Construction | 2015 |
| D & J Trans Ltd | Transport & logistics | 2026 |
| D & L Buildings Limited | Construction | 2018 |
| D & L Higgins Limited | Extraterritorial | 2015 |
| D & LK Construction Limited | Manufacturing | 2026 |
| D & N Medics Limited | Health & social care | 2018 |
| D & R Property Group Limited | Real estate | 2019 |
| D and G M Investments Limited | Real estate | 2022 |
| D B Black Ltd | Administrative & support | 2017 |
| D C Autosparx Limited | Wholesale & retail | 2012 |
| D Chakrabarti and Co Limited | Professional & scientific | 2019 |
| D COR Design Studio Ltd | Professional & scientific | 2014 |
| D Family Ltd | Real estate | 2019 |
| D G Electrical Ltd | Construction | 2011 |
| D G Harper Consultants Limited | Real estate | 2011 |
| D G W Limited | Administrative & support | 2015 |
| D Gandhi Properties Limited | Real estate | 2025 |
| D J & J Properties Ltd | Real estate | 2020 |
| D J Gregory Management Ltd | Real estate | 2013 |
| D K Drycleaners Ltd | Other services | 2014 |
| D L Hunter Ltd | Professional & scientific | 2024 |
| D M Accounting Services Limited | Professional & scientific | 2005 |
| D M G Seaways Shipping Ltd | Transport & logistics | 2025 |
| D M G Project Management Services Ltd | Other services | 2018 |
| D Mask UK Ltd | Administrative & support | 2016 |
| D N Accountancy Ltd | Professional & scientific | 2019 |
| D N Bars Ltd | Hospitality | 2017 |
| D N R Maintenance Ltd | Water & waste | 2020 |
| D Patel Architects Limited | Professional & scientific | 2018 |
| D Premium Building Services Limited | Construction | 2024 |
| D Property Holdings Ltd | Financial services | 2021 |
| D R L Investments Limited | Real estate | 2006 |
| D R S Autos Ltd | Wholesale & retail | 2022 |
| D Sagoo Limited | Professional & scientific | 2018 |
| D Shah Consultancy Limited | Information & communication | 2025 |
| D Singh Property Limited | Real estate | 2019 |
| D Taylor Management Ltd | Extraterritorial | 2013 |
| D V Shah & Co Limited | Professional & scientific | 2009 |
| D Walker Transport Limited | Transport & logistics | 2019 |
| D Wilson Construction Limited | Construction | 2018 |
| D&A Aesthetics Limited | Health & social care | 2025 |
| D&A Helix Limited | Other services | 2020 |
| D&A Properties Portfolio Limited | Real estate | 2024 |
| D&A Rana Properties Ltd | Real estate | 2025 |
| D&B CUT and Edge Ltd | Other services | 2025 |
| D&D Access Ltd | Construction | 2021 |
| D&D Cleaning & Services Ltd | Transport & logistics | 2015 |
| D&D Hygienes Ltd | Wholesale & retail | 2025 |
| D&D Management London Ltd | Construction | 2022 |
| D&D Tours and Travels Ltd | Administrative & support | 2026 |
| D&G Drywall Finishing Ltd | Construction | 2024 |
| D&I Global Construction Ltd | Construction | 2026 |
| D&L Paving Ltd | Construction | 2025 |
| D&N Management Ltd | Wholesale & retail | 2023 |
| D&N Trading Ltd | Wholesale & retail | 2025 |
| D&R Property Portfolio Limited | Real estate | 2017 |
| D&R Property Portfolio Management Limited | Real estate | 2023 |
| D&S PVT Ltd | Professional & scientific | 2018 |
| D&S Stone Fit-Out Ltd | Construction | 2026 |
| D&S@Home Ltd | Wholesale & retail | 2017 |
| D'S Islandgrill Limited | Hospitality | 2021 |
| D-Coded Infrared Ltd | Wholesale & retail | 2020 |
| D-Link (Europe) Limited | Information & communication | 1995 |