| D & G Property Services Limited | Construction | 2015 |
| D & M Engineering Limited | Manufacturing | 1992 |
| D & R Group PLC | Construction | 1965 |
| D & R Promotions Limited | Wholesale & retail | 2013 |
| D a E Home Improvements Limited | Construction | 2022 |
| D B R (Leadwork) Limited | Construction | 2008 |
| D Colebrook Limited | Information & communication | 2014 |
| D M Home Solutions Limited | Real estate | 2024 |
| D&A Films Ltd | Information & communication | 2011 |
| D&S (Surrey) Ltd | Hospitality | 2020 |
| D&Zee Traders Limited | Wholesale & retail | 2024 |
| D. Horley Limited | Arts & recreation | 2009 |
| D. Wheatland Engineering Limited | Professional & scientific | 2002 |
| D.A.Soley Limited | Manufacturing | 1935 |
| D.G. Coles & SON Limited | Construction | 1979 |
| D3 Concept Limited | Information & communication | 2021 |
| Dachowler Decorations Ltd | Administrative & support | 2019 |
| Daeva Ltd | Other services | 2024 |
| Daily Edge Ltd | Information & communication | 2025 |
| Damiron Property Ltd | Real estate | 2023 |
| Dampmaster Surrey & Sussex Ltd | Construction | 2025 |
| DAN Bartlett Electrical Limited | Construction | 2016 |
| DAN Mountain Creative Ltd | Professional & scientific | 2026 |
| Daniel James Saunders Ltd | Manufacturing | 2023 |
| Daniel's Development Group Ltd | Construction | 2020 |
| Dapper Shoes (Southern) Ltd | Wholesale & retail | 2025 |
| Dapper Shoes Limited | Wholesale & retail | 2007 |
| Daricatt Consulting Limited | Information & communication | 2025 |
| Dark River Software Consulting Limited | Information & communication | 2015 |
| Dartmoor Build Ltd | Construction | 2024 |
| Dash Translate Ltd | Professional & scientific | 2019 |
| Data Intelligence Software Limited | Information & communication | 2016 |
| Data Lingua Limited | Information & communication | 2025 |
| Data Matters UK Ltd. | Professional & scientific | 2003 |
| Dataiqlab Limited | Information & communication | 2026 |
| Datum Plus Group Ltd | Construction | 2025 |
| Datum Plus Ltd. | Construction | 2018 |
| Dave Perkins Commercial Laundry Repairs Ltd | Manufacturing | 2013 |
| David Ball Restoration (London) Limited | Extraterritorial | 2007 |
| David Ball Restorations Limited | Extraterritorial | 2007 |
| David Cossins Surveyors Limited | Professional & scientific | 2003 |
| David Gerard Consultancy Limited | Professional & scientific | 2017 |
| David Hughes Architects Ltd | Professional & scientific | 2011 |
| David Jarvis Media Ltd | Information & communication | 2023 |
| David Robinson Training Consultants Limited | Professional & scientific | 2011 |
| Davmin Ltd | Real estate | 2024 |
| Daytona Group Ltd | Manufacturing | 1996 |
| Dbagz Solutions Ltd | Health & social care | 2018 |
| DBR Conservation Limited | Construction | 2011 |
| DBR Special Projects Limited | Construction | 2025 |
| DC Corporation Ltd | Professional & scientific | 2025 |
| DCH Electrical Limited | Manufacturing | 2015 |
| DE Clare Court Limited | Households | 2018 |
| DE Novo Strategy Limited | Professional & scientific | 2013 |
| Deanland Wood Park (Holdings) Limited | Financial services | 2024 |
| Deanland Wood Park Limited | Administrative & support | 1960 |
| Deansgate Management Limited | Households | 1984 |
| DEB Consulting Limited | Professional & scientific | 2021 |
| Decentralisation (Investments) Limited | Administrative & support | 1960 |
| Deep Fried Scenery Limited | Arts & recreation | 2019 |
| Defined Grind Ltd | Professional & scientific | 2020 |
| Delarue Crickets Limited | Education | 2015 |
| Delmar Homes Ltd | Construction | 2025 |
| Denley Senior Limited | Professional & scientific | 2023 |
| Denton Plumbing & Heating Limited | Construction | 2009 |
| Deployment Limited | Information & communication | 2024 |
| Dergal Ltd | Professional & scientific | 2025 |
| Design Jobs Board Limited | Administrative & support | 2017 |
| Designing SOL Ltd | Information & communication | 2023 |
| DESPOK3D Ltd | Professional & scientific | 2022 |
| Detailers Movement Ltd | Information & communication | 2021 |
| Deutsche Leasing (UK) Limited | Financial services | 2003 |
| Devonport Electrical Services Limited | Construction | 2025 |
| Devoted Care Company Limited | Health & social care | 2022 |
| Devtec Solutions Limited | Construction | 2012 |
| Dezirable Solutions Limited | Information & communication | 2016 |
| DF Supplies Ltd | Wholesale & retail | 2026 |
| DFB Homes Ltd | Construction | 2020 |
| DG Installations Group Ltd | Construction | 2018 |
| Dhruvani Ltd | Real estate | 2023 |
| Dibc 2002 Limited | Arts & recreation | 2002 |
| Dickinson Consulting & Associates Ltd | Professional & scientific | 2017 |
| Didah Limited | Health & social care | 2023 |
| Digile Media Ltd | Professional & scientific | 2024 |
| Digita Technology Services Limited | Information & communication | 2019 |
| Digital Harmony Productions Ltd | Information & communication | 2024 |
| Digital Umami Ltd | Information & communication | 2023 |
| Digitally UP Ltd | Wholesale & retail | 2018 |
| Dimensional Control Co Limited | Professional & scientific | 2010 |
| Diodan Healthcare Limited | Health & social care | 2014 |
| Dionysus Developments Limited | Administrative & support | 2004 |
| Direct Deliver Ltd | Wholesale & retail | 2026 |
| Direct Extensions Ltd | Construction | 2012 |
| Direct Glass Ltd | Construction | 2025 |
| Dirgau Services Ltd | Transport & logistics | 2022 |
| Distortion Digital Ltd | Information & communication | 2024 |
| Divine Grace Medical Services (UK) Limited | Health & social care | 2014 |
| Divine Innovator Global Limited | Manufacturing | 2026 |
| DKT Lawrence Building Services Limited | Construction | 2017 |
| DLG Computers Ltd | Wholesale & retail | 2020 |