| DO & Co. Event & Airline Catering Limited | Hospitality | 2003 |
| DO & Co. International Catering Limited | Hospitality | 1996 |
| Docians & Co Ltd | Construction | 2020 |
| Doctor Phones & Computers Ltd | Wholesale & retail | 2020 |
| Dodoz Ltd | Wholesale & retail | 2024 |
| Dogdrippuk Ltd | Other services | 2024 |
| Dogra Estates Limited | Real estate | 2023 |
| Dolce Estetica UK Ltd | Wholesale & retail | 2025 |
| Dolce Senso Ltd | Wholesale & retail | 2019 |
| DOM Care Housing CIC | Real estate | 2023 |
| DOM Care Services Ltd | Hospitality | 2017 |
| Domar Solutions Ltd | Wholesale & retail | 2010 |
| Dometrix Ltd | Wholesale & retail | 2022 |
| Dominus Commercium Ltd | Wholesale & retail | 2025 |
| Domix Driver Hire Limited | Transport & logistics | 2008 |
| Domz Spicy Pepper Ltd | Hospitality | 2023 |
| Doncaster Business Park Limited | Real estate | 2024 |
| Doodaz Limited | Hospitality | 2024 |
| Door to Door London Investors Limited | Real estate | 2021 |
| Doors Academy of London Ltd | Education | 2023 |
| Dorchester Property Estates Limited | Construction | 2022 |
| Dosa Cartel Limited | Hospitality | 2025 |
| Double H Construction Ltd | Construction | 2020 |
| Douceur Perfumes Limited | Wholesale & retail | 2024 |
| Down to Earth Organics Ltd | Manufacturing | 2020 |
| DP Home and Estates Ltd | Real estate | 2023 |
| DPL Groundworks Ltd | Construction | 2026 |
| DPS Housing Ltd | Real estate | 2023 |
| Dpsg Ltd | Information & communication | 2025 |
| DQS Medizinprodukte UK Limited | Administrative & support | 2021 |
| DQS UK Limited | Administrative & support | 2008 |
| DR Elite Security Ltd | Administrative & support | 2013 |
| DR Fire Protection Ltd | Construction | 2024 |
| DR Heal Ltd | Health & social care | 2025 |
| DR JK Juttla Limited | Professional & scientific | 2011 |
| DR Kiran Purewal Associate Ltd | Health & social care | 2025 |
| DR Nikki Limited | Health & social care | 2023 |
| DR Siobhan Carver Ltd | Health & social care | 2022 |
| Dragon House Limited | Hospitality | 2025 |
| Dragons Peri Peri UK Ltd | Hospitality | 2024 |
| DRC Shipping UK Limited | Transport & logistics | 2022 |
| DRD Investments Ltd | Real estate | 2025 |
| Dream Auto Ltd | Wholesale & retail | 2014 |
| Dream Bayt Limited | Real estate | 2023 |
| Dream Car Service Limited | Transport & logistics | 2014 |
| Dream Home 4 YOU Ltd | Real estate | 2025 |
| Dream Homes Residentials Hounslow Ltd | Real estate | 2018 |
| Dream Space Bedroom and Kitchen Ltd | Construction | 2025 |
| Dream Studio 97 Ltd | Other services | 2022 |
| Dream to Delivery Events Ltd | Hospitality | 2025 |
| Dreamhouse Studios Limited | Other services | 2016 |
| Dreampeak Ltd | Real estate | 2026 |
| Dreams Beyond Horizon Ltd | Health & social care | 2026 |
| Dreams Foods Limited | Hospitality | 2014 |
| Dreson Group Limited | Wholesale & retail | 2019 |
| DRG Consultancy Limited | Professional & scientific | 2025 |
| Drill Plant UK Ltd | Wholesale & retail | 2022 |
| Drink Junction Ltd | Wholesale & retail | 2014 |
| Drinks & Direct Ltd | Wholesale & retail | 2022 |
| Drinks Deliver to Door Ltd | Wholesale & retail | 2021 |
| Drinks Haven Ltd | Wholesale & retail | 2023 |
| Drisa Accountants Limited | Professional & scientific | 2025 |
| Drisham Ltd | Wholesale & retail | 2026 |
| Driveora Ltd | Wholesale & retail | 2026 |
| Drivetech Patios and Landscaping Ltd | Administrative & support | 2023 |
| Driveway Clean Pro Ltd | Administrative & support | 2025 |
| Driving Solutions Group Limited | Wholesale & retail | 2023 |
| DRM VIP Limited | Transport & logistics | 2018 |
| DRN Services & FM Limited | Administrative & support | 2026 |
| Droch Construction Limited | Construction | 2019 |
| Dropcapsule Ltd | Wholesale & retail | 2024 |
| DRS Carpets Limited | Construction | 2024 |
| DRS Choice Co Ltd | Wholesale & retail | 2024 |
| DS Build and Design Ltd | Construction | 2024 |
| DS Consultant Solutions Ltd | Administrative & support | 2025 |
| DS Dhillon Properties Ltd | Real estate | 2025 |
| DS Furniture Ltd | Manufacturing | 2019 |
| DS Global Construction Ltd | Construction | 2017 |
| DS Real Living Ltd | Real estate | 2025 |
| DS Solution Services Limited | Wholesale & retail | 2016 |
| DS Telecoms Ltd | Wholesale & retail | 2018 |
| DSA London Ltd | Real estate | 2021 |
| DSG Automotive Ltd | Wholesale & retail | 2025 |
| DSG Holdings Private Ltd | Wholesale & retail | 2023 |
| DSJ IT Services (UK) Ltd | Information & communication | 2019 |
| DSK Home Improvements Ltd | Construction | 2024 |
| Dsons Limited | Real estate | 2009 |
| DSS Caterings Ltd | Hospitality | 2025 |
| DSS Furniture Designs Ltd | Manufacturing | 2025 |
| Dsteel Limited | Construction | 2014 |
| DTF Law Limited | Professional & scientific | 2013 |
| DTS Capital Limited | Real estate | 2021 |
| Dubrud Limited | Construction | 2022 |
| Dudley Bentry Limited | Extraterritorial | 2024 |
| Dunstable Superstore Ltd | Wholesale & retail | 2014 |
| Dunwoody Airline Services Limited | Transport & logistics | 1979 |
| Dunya Ventures Ltd | Wholesale & retail | 2025 |
| Durban Super Transport Limited | Transport & logistics | 2023 |
| Durdle UK Limited | Wholesale & retail | 2022 |
| Durga School of Motoring Ltd | Education | 2019 |