| Dhadwal Construction Ltd | Construction | 2015 |
| Dhaliwal Group Ltd | Real estate | 2019 |
| Dhami Luxe Estates Ltd | Real estate | 2025 |
| Dhami Property Investments Ltd | Real estate | 2025 |
| Dhami Travel Ltd | Other services | 2018 |
| Dhanda Investment Management Limited | Real estate | 2016 |
| Dhesi Group Limited | Administrative & support | 2026 |
| Dhesi Supermarket (Herts) Ltd | Wholesale & retail | 2023 |
| Dhesi Supermarkets Limited | Wholesale & retail | 1998 |
| Dhillon Brothers Transport Limited | Construction | 2025 |
| Dhillon Construction Ltd | Construction | 2025 |
| Dhillon Investment Corporation Limited | Real estate | 2019 |
| Dhillon Networks Ltd | Information & communication | 2017 |
| Dhillon Realty Group Ltd | Real estate | 2025 |
| Dhillon UK Transport Ltd | Transport & logistics | 2016 |
| Dhinsa Real Estate Limited | Construction | 2017 |
| DHR Haircare Ltd | Other services | 2024 |
| Diagnovix Limited | Information & communication | 2026 |
| Dialond UK Limited | Administrative & support | 2017 |
| Diamantgrube Limited | Health & social care | 2018 |
| Diamex Holdings Limited | Real estate | 2025 |
| Diamond Detailing Kent Limited | Administrative & support | 2021 |
| Diamond Hand Car Wash (Northfleet) Ltd | Other services | 2023 |
| Diamond Heritage Investment Ltd | Professional & scientific | 2025 |
| Diamond Lane Ltd | Other services | 2022 |
| Diana Gabriela Limited | Transport & logistics | 2026 |
| Diaspora Talent Management Ltd | Professional & scientific | 2025 |
| Dibra Properties Ltd | Real estate | 2023 |
| Diddlyboo Ltd | Health & social care | 2023 |
| Didgetallpall Limited | Wholesale & retail | 2023 |
| Diggerworld Limited | Extraterritorial | 2002 |
| Diggin Structures Southern Ltd | Professional & scientific | 2016 |
| Digital Hands Ltd | Information & communication | 2014 |
| Digital Technology Innovation & Data Hack Pioneer Ltd | Information & communication | 2018 |
| Digital Transform Limited | Wholesale & retail | 2019 |
| Digital Versify Ltd | Information & communication | 2024 |
| Digital Websites Ltd | Information & communication | 2020 |
| Digitize Engineering Ltd | Professional & scientific | 2018 |
| Digitize Mechanical Commissioning Ltd | Professional & scientific | 2023 |
| Dignity PVT Ltd | Health & social care | 2013 |
| Diit Training UK Consulting Ltd | Information & communication | 2023 |
| Dikachi and Associate Limited | Real estate | 2022 |
| DIM & Co Construction Ltd | Construction | 2019 |
| DIM 88 Trans Limited | Transport & logistics | 2017 |
| Dimensioned Ltd | Professional & scientific | 2024 |
| DIN Holdings & Logistics Limited | Transport & logistics | 2025 |
| Dinamo Ltd. | Wholesale & retail | 2011 |
| Dingri Brothers Limited | Construction | 2024 |
| Dipnal & Sach Limited | Health & social care | 2018 |
| Dipvod Ltd | Information & communication | 2018 |
| Direct Automotive Ltd | Wholesale & retail | 2022 |
| Direct Steel Fixing Ltd | Other services | 2016 |
| Discount Builders Merchants (Kent) Limited | Wholesale & retail | 2005 |
| Distinctive Stone Ltd | Construction | 2026 |
| Ditchingham Stores Limited | Wholesale & retail | 2005 |
| Divchizzy Builders Ltd | Construction | 2015 |
| Diveco Marine Trustee Limited | Financial services | 2025 |
| Divine Aesthetics by Sarah-Jean Ltd | Other services | 2026 |
| Divine Foods UK Ltd | Wholesale & retail | 2024 |
| Dixy Chiken Gravesend 2025 Ltd | Hospitality | 2025 |
| DJ Mahey Ltd | Manufacturing | 2024 |
| DJ Russ Limited | Health & social care | 2013 |
| DJA Technical Services Ltd | Manufacturing | 2017 |
| Django Kent Limited | Hospitality | 2020 |
| DJC Plastering Ltd | Construction | 2007 |
| DJM Property Solutions Ltd | Real estate | 2014 |
| DJP Couriers & Consultant's Ltd | Transport & logistics | 2025 |
| DJS Air Conditioning Ltd | Energy | 2020 |
| DJS Cleaning & Property Maintenance Ltd | Administrative & support | 2024 |
| DK Commercial (Kent) Limited | Administrative & support | 2025 |
| DK Flooring Services Limited | Construction | 2005 |
| DKF Training & Assessment Providers Limited | Education | 2018 |
| DKG Lettings Ltd | Real estate | 2025 |
| DLG Developments (South East) Ltd | Construction | 1997 |
| DLH Heating Services Ltd | Construction | 2023 |
| Dligence Data Insights UK PVT. Ltd | Information & communication | 2024 |
| DLJ Assets Ltd | Real estate | 2025 |
| DLK (Kent) Ltd | Real estate | 2012 |
| DLM Investments Ltd | Real estate | 2014 |
| DLN Homes Ltd | Real estate | 2025 |
| DLN Transport Ltd | Transport & logistics | 2019 |
| DLT Bespoke Finishes Ltd | Construction | 2026 |
| DLV Property Sourcing Ltd | Real estate | 2025 |
| DM Health Ltd | Health & social care | 2019 |
| DM Medicare Services Ltd | Health & social care | 2023 |
| DM Security Ltd | Administrative & support | 2025 |
| DM Shipping Limited | Wholesale & retail | 2023 |
| DM Technology Ltd | Professional & scientific | 2020 |
| Dmap Security Ltd | Administrative & support | 2017 |
| DMC Consulting Services Ltd | Administrative & support | 2015 |
| DMC Education Services Ltd | Administrative & support | 2024 |
| DMC Electrical & Property Services Limited | Construction | 2013 |
| DMC Estates Private Ltd | Real estate | 2017 |
| DMD Specialist Ltd | Construction | 2020 |
| DMI Trans Ltd | Transport & logistics | 2020 |
| Dmitri B Ltd | Construction | 2022 |
| DMJ Practicals Ltd | Other services | 2025 |
| Dmj&R Surveying Limited | Professional & scientific | 2026 |
| DMO Mechanical and Electrical Limited | Construction | 2014 |
| DN Roofing & Building Ltd | Construction | 2020 |