| CTD Groundworks Ltd | Construction | 2025 |
| CTE (S.E.) Ltd | Manufacturing | 2009 |
| Current Works Limited | Construction | 2025 |
| Curry N Rice Ltd | Hospitality | 2023 |
| Cutest Little Feet Ltd | Wholesale & retail | 2022 |
| Cyberknowledge Limited | Information & communication | 2011 |
| Cyphagenics Limited | Information & communication | 2022 |
| D & a Builders Ltd | Construction | 2018 |
| D & M Resources Limited | Wholesale & retail | 2012 |
| D Davis Broadcasting Ltd | Administrative & support | 2023 |
| D Markin Ltd | Construction | 2022 |
| D Prime Accounting Ltd | Professional & scientific | 2026 |
| D Shakes Ltd | Hospitality | 2018 |
| D&H Group Ltd | Transport & logistics | 2021 |
| D&P Brothers Ltd | Construction | 2020 |
| D&S Assets Ltd | Real estate | 2025 |
| D&S Waste Recycling Ltd | Water & waste | 2023 |
| D-Larx Limited | Construction | 2024 |
| D-Love Jewellery House Ltd | Wholesale & retail | 2015 |
| D-M Lungu Services Ltd | Construction | 2016 |
| D.A.T 2000 Limited | Wholesale & retail | 2001 |
| D.A.T. Tyre Supplies Limited | Wholesale & retail | 1991 |
| D.G. Construct Solution Ltd | Construction | 2015 |
| D3OC Ltd | Health & social care | 2016 |
| DA Evans Property Limited | Real estate | 2026 |
| Daarim Community Interest Company | Hospitality | 2024 |
| Daarim Property Limited | Hospitality | 2024 |
| DAB Lift & Electrical Services Limited | Construction | 1999 |
| Dachabout Day Care Limited | Other services | 2022 |
| Dafku Legal Services Ltd | Professional & scientific | 2018 |
| Daily Fresh Foods(Uk) Ltd | Manufacturing | 2020 |
| Dajci Construction Ltd | Construction | 2022 |
| Dakis 2007 Ltd | Administrative & support | 2015 |
| Damarc UK Limited | Wholesale & retail | 2018 |
| Danazar Ltd | Administrative & support | 2025 |
| Danetre Logistics Group Limited | Administrative & support | 2012 |
| Daniel Thomas Removals & Storage Ltd | Transport & logistics | 2025 |
| Daniel's Property Services Maintenance and Construction Ltd | Construction | 2021 |
| Dannicare and Trading Ltd | Wholesale & retail | 2020 |
| Danola Ltd. | Education | 2015 |
| Darby Mechanical Solutions Ltd | Construction | 2025 |
| Darkvoid Trading Ltd | Wholesale & retail | 2025 |
| Darran Construction Services Ltd | Construction | 2023 |
| Darran Electrical Services Ltd | Construction | 2025 |
| Daseinhomes-Uk Ltd | Real estate | 2025 |
| Dash-Ng Building Solutions Ltd | Construction | 2020 |
| DAT Group Holdings Ltd | Financial services | 2026 |
| Data Mining Technologies Ltd | Financial services | 2023 |
| Datapedia Limited | Information & communication | 2019 |
| Dateoy Limited | Extraterritorial | 2014 |
| Dave Nichols Limited | Wholesale & retail | 2002 |
| David Ross Content Ltd | Information & communication | 2020 |
| Dayoville Ltd | Information & communication | 2024 |
| DAZ Security Limited | Administrative & support | 2025 |
| DBC Recruitment Services Ltd | Education | 2024 |
| Dbwebvision Ltd | Information & communication | 2011 |
| DC Specialists Limited | Professional & scientific | 2018 |
| DC Williams Properties Ltd | Real estate | 2024 |
| Dcie Limited | Wholesale & retail | 2018 |
| Dduk Investments Limited | Real estate | 2003 |
| DE Jesus Estates Limited | Real estate | 2021 |
| Deanbrook Accounting Services Limited | Professional & scientific | 2003 |
| Deao Care Limited | Administrative & support | 2019 |
| Decent Consultancy (London) Limited | Professional & scientific | 2020 |
| Decorecta Limited | Manufacturing | 2018 |
| Deep PAN Pizza Limited | Hospitality | 2020 |
| Deftangel Ltd | Information & communication | 2017 |
| Delamode Anglia Limited | Transport & logistics | 1972 |
| Delamode Braintree Limited | Transport & logistics | 2023 |
| Delamode Bristol Limited | Transport & logistics | 2023 |
| Delamode Distribution UK Ltd | Transport & logistics | 2013 |
| Delamode European Road Limited | Transport & logistics | 2023 |
| Delamode Global Solutions Limited | Transport & logistics | 2023 |
| Delamode Holdings UK Freight Forwarding Limited | Professional & scientific | 2023 |
| Delamode London Limited | Transport & logistics | 2023 |
| Delamode Projects UK Limited | Transport & logistics | 2023 |
| Delamode Trucking Ltd | Transport & logistics | 2023 |
| Delight Housing Limited | Hospitality | 2024 |
| Delink Property Ltd | Real estate | 2024 |
| Delro UK Ltd | Professional & scientific | 2011 |
| Delta City Ltd | Real estate | 2017 |
| Delta Flooring Ltd | Construction | 2025 |
| Delta Force Group Ltd | Administrative & support | 2011 |
| Delta Group Holdings Ltd. | Professional & scientific | 2021 |
| Delta Group Services Ltd | Transport & logistics | 2023 |
| Delta Reception Ltd | Administrative & support | 2023 |
| Delta Sports Ltd | Wholesale & retail | 2015 |
| Deluxe Blossom Childcare Services Ltd | Health & social care | 2025 |
| DEM FF Limited | Health & social care | 2025 |
| Demiland Limited | Real estate | 1979 |
| Dendar Limited | Real estate | 2020 |
| Dengoal Ltd | Wholesale & retail | 2022 |
| Derthom Company Limited | Transport & logistics | 2023 |
| Deshi Kitchen Ltd | Hospitality | 2025 |
| Design Bird IT Solutions Ltd | Information & communication | 2013 |
| Designmatrix UK Limited | Professional & scientific | 2001 |
| Desk Ventures Limited | Households | 2025 |
| Destiny Divine Limited | Health & social care | 2015 |
| Destinypeace Relief | Other services | 2025 |
| Detling Diner A249 Limited | Hospitality | 2022 |