| Dgry Limited | Transport & logistics | 2020 |
| DH - GP Locum Ltd | Health & social care | 2022 |
| DHB Golf Ltd | Wholesale & retail | 2024 |
| Dhfe Ltd | Wholesale & retail | 2015 |
| Dhfg Services Ltd | Construction | 2024 |
| Dhian Homes Ltd | Real estate | 2022 |
| Dhillon Electrical Services Ltd | Construction | 2023 |
| DHP Technical Services Ltd | Professional & scientific | 2021 |
| DI Ceramstone (Contracts) Ltd | Wholesale & retail | 2018 |
| DI CS (Kent) Ltd | Extraterritorial | 2015 |
| DI Interior Design Ltd | Professional & scientific | 2026 |
| Diaa Limited | Wholesale & retail | 2022 |
| Diabetes Consults Ltd | Public administration | 2021 |
| Diafootcare Limited | Education | 2025 |
| Diamond Autoglass Ltd | Wholesale & retail | 2018 |
| Diamond Homes UK Ltd | Real estate | 2002 |
| Diamond Scenery Limited | Construction | 2022 |
| DIAMOND92 Ltd | Transport & logistics | 2022 |
| Diamonte Ltd | Wholesale & retail | 2024 |
| Dickens Group South Ltd | Water & waste | 2026 |
| Dickens Place Management Company Limited | Households | 1998 |
| Dickies Plumbing & Heating Limited | Construction | 2025 |
| Different Keys Limited | Other services | 2024 |
| Digger Doctor 24/7 Ltd | Manufacturing | 2024 |
| Diggerland Limited | Extraterritorial | 2009 |
| Diggers Direct Limited | Extraterritorial | 2005 |
| Digital Design House Limited | Manufacturing | 2020 |
| Digital Selection Limited | Information & communication | 2013 |
| Dignity Home Care (Medway) Limited | Health & social care | 2021 |
| Dikov Taxi Ltd | Transport & logistics | 2022 |
| Dikov Travel Ltd | Administrative & support | 2026 |
| Dillywood Fields Management Limited | Real estate | 2002 |
| Dilsher Property Investments Ltd | Real estate | 2025 |
| Dimi Security Ltd | Administrative & support | 2010 |
| Dimitrov Petar 0184 Limited | Other services | 2014 |
| Dimovsky Limited | Transport & logistics | 2004 |
| DINE4ALL Ltd | Wholesale & retail | 2023 |
| Dinero Holdings Limited | Financial services | 2025 |
| Dinghy Store Limited | Extraterritorial | 2022 |
| Dinky Diggers Ltd | Wholesale & retail | 2021 |
| Direct Blockbuster Sales Ltd | Wholesale & retail | 2026 |
| Direct Car Source Limited | Wholesale & retail | 2026 |
| Direct Commercial Finance Ltd | Financial services | 2011 |
| Direct Commercial Security Ltd | Administrative & support | 2022 |
| Direct Financial Planning (UK) Limited | Financial services | 2003 |
| Direct Health Properties Ltd | Real estate | 2023 |
| Direct Health Solutions Ltd | Health & social care | 2019 |
| Direct HIT Drainage Ltd | Water & waste | 2024 |
| Direct Motor Parts Ltd | Wholesale & retail | 2023 |
| Direct Plant Hire (UK) Limited | Construction | 2012 |
| Direct Supply Chains Ltd | Extraterritorial | 2018 |
| Direct Training Solutions Ltd | Education | 2001 |
| Dirty Truckerz Ltd | Administrative & support | 2025 |
| Disability Medway Network CIC | Information & communication | 2019 |
| Discovery Displays Ltd | Administrative & support | 2025 |
| Distinct Services Limited | Other services | 2015 |
| Ditto.Cta Ltd | Manufacturing | 2024 |
| Divad Trans Ltd | Transport & logistics | 2019 |
| Divided Ltd | Wholesale & retail | 2013 |
| Divine Favours Enterprise Ltd | Wholesale & retail | 2020 |
| Divisionflex Ltd | Financial services | 2021 |
| Dixon's Drinks Ltd | Wholesale & retail | 2021 |
| DJA Wilton's Limited | Other services | 2018 |
| DJC Rehab Limited | Manufacturing | 2005 |
| DJF Maintenance and Refurbishment Ltd | Construction | 2024 |
| DJK Scaffolding Services Ltd | Construction | 2019 |
| Djmcl Healthcare Services Ltd | Health & social care | 2022 |
| DJP Services (South East) Limited | Construction | 2019 |
| DK Tech Global Limited | Professional & scientific | 2024 |
| DKK Revolution Ltd | Transport & logistics | 2026 |
| DKM Health and Wellbeing Ltd | Health & social care | 2025 |
| DKP Brickwork & Paving Ltd | Construction | 2019 |
| DKS Consultancy LLP | | 2019 |
| DLC Scaffolding Ltd | Construction | 2026 |
| DLD Property & Management Ltd | Construction | 2021 |
| DLK IT Solutions Ltd | Information & communication | 2024 |
| DM Parkinson Limited | Construction | 2021 |
| DM Training Limited | Arts & recreation | 2021 |
| DMA Maintenance Limited | Administrative & support | 2005 |
| DMA Mechanical & Air Conditioning Limited | Construction | 2005 |
| DMA Property Holdings (Kent) Limited | Professional & scientific | 1988 |
| Dmaa Links Limited | Professional & scientific | 2017 |
| DMC Engineering Asset Management Limited | Administrative & support | 2013 |
| DMD (Gravesham) CIC | Transport & logistics | 2024 |
| DME Creation Service Ltd | Health & social care | 2023 |
| DMI Communications Limited | Professional & scientific | 2021 |
| DMI Home Improvements Ltd | Administrative & support | 2017 |
| DMM Groundwork Ltd | Construction | 2024 |
| Dmmm Property Group Limited | Real estate | 2026 |
| DMT Maintenance Ltd | Construction | 2017 |
| DN Domestic Limited | Administrative & support | 2024 |
| DNO LT Ltd | Construction | 2014 |
| Dockrell Ltd | Extraterritorial | 2023 |
| DOM and RAZ Van Ltd | Transport & logistics | 2022 |
| Dom.Robb Ltd | Construction | 2019 |
| Domain Centric Ltd | Information & communication | 2016 |
| Doman Construction Ltd | Manufacturing | 2022 |
| Domba Consulting Limited | Information & communication | 2009 |
| Domerik Design & Build Ltd | Construction | 2024 |
| Dominion 1 Limited | Real estate | 2013 |