| CUT 'N Grill Limited | Hospitality | 2019 |
| Cutler Golding Property Ltd | Real estate | 2021 |
| Cutting Edge Decking Solutions Ltd | Administrative & support | 2025 |
| Cuworks Ltd | Construction | 2021 |
| CVA Pubs Ltd | Hospitality | 2018 |
| Cvggamboa Ltd | Information & communication | 2021 |
| Cybersun Technology Ltd | Information & communication | 2026 |
| Cyberworld Ltd | Information & communication | 2024 |
| Cygnets Model Boat Club Limited(The) | Arts & recreation | 1978 |
| Cyon Healthcare Services Ltd | Wholesale & retail | 2024 |
| Cyproguard Ltd | Agriculture & fishing | 2022 |
| D & S Bar Ltd | Hospitality | 2012 |
| D BON Air Limited | Manufacturing | 2016 |
| D Cass Rail Ltd | Construction | 2018 |
| D K Fade Ltd | Other services | 2024 |
| D Vidler Contractors Limited | Construction | 2018 |
| D Vigus Contracts Ltd | Manufacturing | 2014 |
| D X Risk Ltd | Other services | 2019 |
| D&G Insulation Ltd | Real estate | 2019 |
| D&J Groundwork Ltd | Construction | 2024 |
| D'Lec Components Limited | Wholesale & retail | 1994 |
| D'Phence Ltd | Professional & scientific | 2022 |
| D. Skillen Installations Limited | Construction | 2023 |
| D.C. Thompson & Sons Limited | Construction | 2002 |
| D.Imperial Ltd | Real estate | 2026 |
| D.T.Kent Limited | Real estate | 2016 |
| D4S Consultant Ltd | Construction | 2012 |
| D5 Safety Solutions Limited | Hospitality | 2024 |
| DAC Architectural Services Ltd | Professional & scientific | 2013 |
| Dacb Solutions Ltd | Construction | 2022 |
| Dacey Plumbing & Heating Ltd | Construction | 2015 |
| Dach Consultancy Limited | Health & social care | 2010 |
| Daemon Services Ltd | Information & communication | 2025 |
| DAG Couriers Ltd | Transport & logistics | 2021 |
| Dagus International Limited | Manufacturing | 2024 |
| Daisy's Dog Empawrium Limited | Wholesale & retail | 2010 |
| Dala Bird and Pest Limited | Construction | 2023 |
| Dale Capital Limited | Real estate | 2026 |
| Dall Engineering Ltd | Construction | 2022 |
| Dalpol Ltd | Wholesale & retail | 2023 |
| Daltncorp Ltd | Wholesale & retail | 2024 |
| Dalwood Designer Flooring Ltd | Professional & scientific | 2019 |
| Damilola & Itunuoluwa Ltd | Health & social care | 2023 |
| Damon Foord Rail Limited | Transport & logistics | 2013 |
| Damy Ventures Limited | Health & social care | 2015 |
| Dan&Pelin Ltd | Construction | 2018 |
| Danaway Borden Limited | Households | 2009 |
| Dance Envy Events Ltd | Hospitality | 2025 |
| Dance Envy Ltd | Education | 2020 |
| Dandy&Co Limited | Health & social care | 2023 |
| Daniel Build Ltd | Construction | 2020 |
| Daniel Morris (Cabinet Maker) Limited | Manufacturing | 2005 |
| Daniela BG Ltd | Transport & logistics | 2019 |
| Dankat Care Ltd | Health & social care | 2010 |
| Danny Clarke Roofing Ltd | Construction | 2024 |
| Danny P Limited | Construction | 2018 |
| Danny S Construction Ltd | Construction | 2025 |
| Dansley Properties Ltd | Real estate | 2020 |
| Danties Kitchen Limited | Hospitality | 2024 |
| Darc Logistic Ltd | Wholesale & retail | 2024 |
| Darius International Trading Ltd | Wholesale & retail | 2026 |
| Dark Matter Sourcing Ltd | Wholesale & retail | 2025 |
| Darland Carpets & Interiors Ltd | Wholesale & retail | 2023 |
| Darland Garden Care Ltd | Administrative & support | 2022 |
| Darsha Contracts Limited | Construction | 2017 |
| Darshan Property Investments Limited | Construction | 2023 |
| Datech Solutions Limited | Construction | 2006 |
| Datv Ltd | Information & communication | 2024 |
| Davdandar Assets & Investments Ltd | Real estate | 2023 |
| Dave Crawford Marine Limited | Professional & scientific | 2017 |
| Dave Trimmer Airline Mallets Ltd | Manufacturing | 2024 |
| Dave's Tattoo & Bodypiercing Studio Ltd | Other services | 2006 |
| Davesec Limited | Wholesale & retail | 2021 |
| Davey Civils Ltd | Construction | 2008 |
| David Andrews Property Management Limited | Households | 2023 |
| David Haddock Limited | Manufacturing | 2003 |
| David N Goliath Limited | Professional & scientific | 2023 |
| David White Boilercare Limited | Construction | 2005 |
| Davidbcare Agency Ltd | Health & social care | 2018 |
| Davidcole Limited | Construction | 2025 |
| Davina Medical Resources Limited | Health & social care | 2013 |
| Davog Homes Limited | Health & social care | 2025 |
| Davolls Commercial Properties Limited | Real estate | 2024 |
| Davolls Estates Limited | Real estate | 2021 |
| Dawn Packaging Limited | Manufacturing | 2024 |
| DB Integration Limited | Information & communication | 2010 |
| DB Soundboard Ltd | Manufacturing | 2020 |
| DB Trades Ltd | Construction | 2023 |
| DBG Defence Ltd | Professional & scientific | 2019 |
| DBM Management Ltd | Administrative & support | 2019 |
| DC Accounts Limited | Professional & scientific | 2015 |
| DC AI Ltd | Information & communication | 2022 |
| DC Frames Ltd | Construction | 2024 |
| DCW Enterprises Ltd | Wholesale & retail | 2021 |
| DCW Property Group Ltd | Real estate | 2025 |
| Ddfm Ltd | Wholesale & retail | 2026 |
| DDJ Consultancy Services Ltd | Professional & scientific | 2025 |
| DE Roti MAN Ltd | Hospitality | 2022 |
| Dean & Co Hairdressing Ltd | Other services | 2014 |
| Dean Court (Freehold) Limited | Households | 2025 |