| Dona Linda Production Ltd | Hospitality | 2021 |
| Donabay Limited | Administrative & support | 2015 |
| Donaghy Services Limited | Transport & logistics | 2017 |
| Donald Fisher (Ealing) Limited | Real estate | 1960 |
| Donata Davidoff Limited | Manufacturing | 2018 |
| Donbecca Consulting Limited | Administrative & support | 2021 |
| Doncaster Hotels Ltd | Hospitality | 2024 |
| Doneva Designs Ltd | Professional & scientific | 2021 |
| Dong Limited | Wholesale & retail | 2007 |
| Donna MAY Limited | Wholesale & retail | 2018 |
| Donna MAY Style Limited | Other services | 2023 |
| Donnellan & Watts Ltd | Real estate | 2023 |
| Donnellan & Watts Properties LLP | | 2023 |
| Donnington Investments Ltd | Construction | 2012 |
| Door Step Food Limited | Wholesale & retail | 2025 |
| DOOR2TRAVEL Ltd | Administrative & support | 2025 |
| Doora Express Services Limited | Transport & logistics | 2025 |
| Dophodyl Homes Limited | Financial services | 2022 |
| Doraiswamy Property Investments Ltd | Real estate | 2020 |
| Dorcha Feature Film Ltd | Information & communication | 2018 |
| Dorchester Heating Solutions Limited | Administrative & support | 2015 |
| Dorchid Limited | Health & social care | 2013 |
| Dorell Securities Ltd | Administrative & support | 2021 |
| Dorian International Transport Limited | Transport & logistics | 2018 |
| Doris Group Holding Co Ltd | Real estate | 2025 |
| Doriscorp Limited | Financial services | 2025 |
| Dorman & Co (Certificated Bailiffs) Limited | Other services | 1998 |
| Dorman & Co (Law Enforcement Agents) Limited | Public administration | 2006 |
| Dorobantu Transport Limited | Transport & logistics | 2019 |
| Dorset Road Property Management Limited | Households | 2022 |
| Doru Ltd | Construction | 2015 |
| Doruka Limited | Professional & scientific | 2009 |
| Dory Ltd | Wholesale & retail | 2024 |
| Dosa Delight Ltd | Hospitality | 2024 |
| Dosa Kadai PVT Ltd | Hospitality | 2026 |
| Doschbaas Limited | | 1988 |
| Dose Kebab Limited | Hospitality | 2025 |
| Doshi Enterprises Limited | Professional & scientific | 2019 |
| Dostea Holdings Limited | Manufacturing | 2020 |
| Dotg Properties Ltd | Real estate | 2025 |
| Dotlink Systems Limited | Real estate | 1990 |
| Dotsinno Ltd | Wholesale & retail | 2018 |
| Dotted Line App Ltd | Information & communication | 2023 |
| Double a Properties Limited | Real estate | 2016 |
| Double Check Security Group Ltd | Administrative & support | 2012 |
| Double Dazzle Co Ltd | Wholesale & retail | 2025 |
| Double Metro Limited | Real estate | 2026 |
| Double Oak Properties Limited | Real estate | 2025 |
| Double R Engraving Ltd | Professional & scientific | 2009 |
| Double R Property Limited | Real estate | 2016 |
| Double S Builder Ltd | Construction | 2018 |
| Douglas & Davis Consultant Limited | Construction | 2014 |
| Douglas and Jennifer Reeves Properties Limited | Construction | 2018 |
| Doushuroll Limited | Information & communication | 2021 |
| Dove Park (West) Property Management Co. Limited | Households | 1963 |
| Dove Tree Properties Limited | Real estate | 2020 |
| Dovedons Limited | Administrative & support | 2007 |
| Doviki Limited | Real estate | 2026 |
| Downing IP Limited | Professional & scientific | 2016 |
| Downtown Constructions Limited | Construction | 2023 |
| DOX Logistics Limited | Transport & logistics | 2019 |
| Dozeli Limited | Construction | 2023 |
| DP (London) Limited | Professional & scientific | 2019 |
| DP Business Advisors Ltd | Professional & scientific | 2025 |
| DP Cloud Limited | Wholesale & retail | 2025 |
| DP Global Ltd | Transport & logistics | 2025 |
| DP Incorporate Limited | Professional & scientific | 2018 |
| DP Logistics & Removals Ltd | Transport & logistics | 2026 |
| DP Martin Consultancy Ltd | Construction | 2019 |
| DP Properties (Barnet) Ltd | Real estate | 2019 |
| DP Retail Ltd | Wholesale & retail | 2024 |
| DP SOL Ltd | Administrative & support | 2017 |
| DP Technologies Ltd | Wholesale & retail | 2023 |
| Dp&H Service's Ltd | Construction | 2010 |
| Dp.Qualityconstruction Limited | Construction | 2024 |
| DPD Carpet & Flooring Ltd | Construction | 2022 |
| DPE Rail Limited | Administrative & support | 2015 |
| DPF Cleaning Specialist Limited | Wholesale & retail | 2017 |
| Dppn Limited | Construction | 2014 |
| Dpps Trading Limited | Wholesale & retail | 2013 |
| DPS Investment Group Limited | Real estate | 2026 |
| Dps-Uk Ltd | Information & communication | 2025 |
| Dpworldretail Limited | Wholesale & retail | 2026 |
| DR Admissions Ltd | Education | 2025 |
| DR Amita's Clinic Ltd | Health & social care | 2021 |
| DR Aumanthi Limited | Health & social care | 2016 |
| DR Azhar Smiles Ltd | Health & social care | 2023 |
| DR Bansri Aesthetics Ltd | Health & social care | 2021 |
| DR Daniel Gordon Health & Wellbeing Limited | Health & social care | 2022 |
| DR Farah Clinic Ltd | Health & social care | 2022 |
| DR G L Medical Consultancy Ltd | Health & social care | 2024 |
| DR Gandhi Dent Ltd | Health & social care | 2026 |
| DR Gaye Limited | Manufacturing | 2012 |
| DR George Kyriacou Limited | Real estate | 2025 |
| DR H Kafil Practice Limited | Health & social care | 2008 |
| DR IAN HAY Limited | Health & social care | 2008 |
| DR Jameel Clinics Limited | Health & social care | 2023 |
| DR Keith Private Medical Practice Ltd | Health & social care | 2026 |
| DR L G Forni Medical Services Ltd | Health & social care | 2010 |
| DR Lan-Anh Hunter Ltd | Health & social care | 2024 |