| Devmark Limited | Manufacturing | 2005 |
| Devmax Limited | Information & communication | 2019 |
| Devon Scott Waller Engineering Limited | Manufacturing | 2017 |
| Devya Limited | Financial services | 2025 |
| Dewgrove Management Limited | Real estate | 2001 |
| DEY Electrical Ltd | Construction | 2016 |
| DG Cities Limited | Professional & scientific | 2015 |
| DG Global Group Limited | Other services | 2026 |
| DG OIL & GAS Limited | Construction | 2021 |
| DGC Glazing Ltd | Construction | 2023 |
| DGL Testing Services Ltd | Construction | 2006 |
| DH Taxis Enterprise Limited | Transport & logistics | 2024 |
| Dhaka Masala Ltd | Hospitality | 2025 |
| DHB (Dimbu Houses for Brits) Ltd | Construction | 2021 |
| Dhhb Ltd | Construction | 2022 |
| Diadem Catering Services Limited | Hospitality | 2025 |
| Diadem Homes and Properties Limited | Real estate | 2024 |
| Diadem Property Holdings Ltd | Real estate | 2026 |
| Diamond Accounts Limited | Professional & scientific | 2016 |
| Diamond Evolution Limited | Professional & scientific | 2024 |
| Diamond Home Support Limited | Administrative & support | 2011 |
| Diamond Outsourcing Limited | Professional & scientific | 2018 |
| Diamond Scissors Sittingbourne Ltd | Other services | 2023 |
| Diatrofi Ltd | Administrative & support | 2017 |
| Dickens Court Management Company (Kent) Ltd | Real estate | 2002 |
| Digirom Ltd | Health & social care | 2024 |
| Digital Greenwich Connect Ltd | Information & communication | 2022 |
| Diligent Security Ltd | Administrative & support | 2021 |
| Dinner House Ltd | Hospitality | 2021 |
| Dinobabyofficial Ltd | Arts & recreation | 2024 |
| Direct Response Fulfilment Limited | Wholesale & retail | 1994 |
| Direct Response Mailing Ltd | Wholesale & retail | 2024 |
| Direct Response Marketing Group Limited | Wholesale & retail | 2007 |
| Direct Trade Sales Ltd | Wholesale & retail | 2024 |
| Discount Tyres Stop and Steer Center Limited | Wholesale & retail | 2012 |
| Discovery Property Ltd | Real estate | 2018 |
| Dishy Mcbrit-Face Ltd | Information & communication | 2024 |
| Diversity House Limited | Health & social care | 2007 |
| Divine Integrated Social Care Ltd | Health & social care | 2025 |
| DIY Sealants Limited | Administrative & support | 2016 |
| DJ Corner Shop Ltd | Wholesale & retail | 2019 |
| DJF Concepts Ltd | Administrative & support | 2021 |
| DJH Kent Ltd | Construction | 2023 |
| Djsh Limited | Manufacturing | 1994 |
| Dk&Y Ltd | Other services | 2016 |
| Dkfk Limited | Transport & logistics | 2026 |
| DLH Electrical Ltd | Construction | 2016 |
| Dllogisticsuk Limited | Transport & logistics | 2021 |
| Dlong Roofing Ltd | Construction | 2021 |
| DM Enviro Ltd | Construction | 2025 |
| DMS Maintenance Services Ltd | Construction | 2022 |
| DN Brown Ltd | Wholesale & retail | 2024 |
| Dobbs Haulage Ltd | Wholesale & retail | 2023 |
| Doddington Service Station Limited | Wholesale & retail | 2003 |
| DOE Ventures Limited | Real estate | 2012 |
| Doka UK Formwork Technologies Limited | Administrative & support | 1997 |
| Dokin Car Parts Ltd | Construction | 2018 |
| Dolivel Holdings Limited | Health & social care | 2023 |
| Dolly’S South East Ltd | Other services | 2025 |
| Dolton Welding Ltd | Construction | 2015 |
| Domamah Ltd | Health & social care | 2025 |
| Dome Electrical Services Limited | Construction | 2020 |
| Dominion City Sittingbourne Ltd | Other services | 2026 |
| Dominion Word of Faith Ltd | Other services | 2024 |
| Domus Albus Ltd | Real estate | 2024 |
| Domus Lucrum Properties Ltd | Real estate | 2026 |
| Donna's ALE House Limited | Hospitality | 2017 |
| Doors Sincerely Limited | Wholesale & retail | 2008 |
| Dopodomani Limited | Financial services | 2017 |
| Dorocina Ltd | Health & social care | 2023 |
| Doré Metal Services Southern Limited | Wholesale & retail | 1984 |
| Doré Trustees Limited | Administrative & support | 2021 |
| Dover Ships Stores Limited | Extraterritorial | 2004 |
| Dover Trussed Roof Company Limited | Manufacturing | 1990 |
| Downland Trading (Kent) Limited | Water & waste | 2016 |
| Downtown Marine Construction Limited | Extraterritorial | 2004 |
| DR Crystal Barnes Ltd | Health & social care | 2024 |
| DR Mobility Limited | Wholesale & retail | 1999 |
| DR Telemarketing Ltd | Administrative & support | 2020 |
| Dragonfight Ltd | Arts & recreation | 2024 |
| DRB Media Limited | Information & communication | 2019 |
| Drink & Drive Limited | Hospitality | 2025 |
| Drip DRY Drum Limited | Real estate | 2013 |
| Dritan Ltd | Other services | 2025 |
| Drive Tech Construction Ltd | Administrative & support | 2020 |
| Driverdirect Trans Limited | Transport & logistics | 2015 |
| DRJ Electrical & Renewables Ltd | Construction | 2023 |
| DRM Ventilation Services Ltd | Construction | 2005 |
| DRW Estates Ltd | Real estate | 2026 |
| Drywall Interior Limited | Construction | 2024 |
| DS Business Solutions Ltd | Professional & scientific | 2020 |
| DSA Consulting Limited | Professional & scientific | 1999 |
| DSB Kent Ltd | Construction | 2019 |
| DSC Project Management Ltd | Professional & scientific | 2025 |
| DSD Holdings Ltd | Real estate | 2022 |
| DSK Environmental Ltd | Water & waste | 2020 |
| DSK Site Services Ltd | Administrative & support | 2025 |
| Dsnw Services Ltd | Administrative & support | 2016 |
| Dsretailuk Ltd | Wholesale & retail | 2018 |
| DT Frederick Limited | Professional & scientific | 2025 |