| Divyanshu Property Ltd | Real estate | 2025 |
| Dixon & Sons Construction Limited | Construction | 2014 |
| Dixon and Sons Developments Limited | Construction | 2021 |
| Dixy Chicken Eccles Limited | Hospitality | 2020 |
| Dixy Fried Chicken Ltd | Hospitality | 2019 |
| Diya by RFL Ltd | Wholesale & retail | 2005 |
| Diya Online Ltd | Wholesale & retail | 2014 |
| DJ A-Tech Ltd | Arts & recreation | 2025 |
| DJ Artfix Limited | Construction | 2018 |
| DJ Blair Kami Entertainments Ltd | Arts & recreation | 2022 |
| DJ Moore Garages Ltd | Construction | 2020 |
| DJ2 Services Limited | Construction | 2025 |
| Djenterprises Ltd | Wholesale & retail | 2020 |
| DJG Fabrications Ltd | Manufacturing | 2019 |
| Djinn Smoothies Ltd | Wholesale & retail | 2024 |
| DJS Plant and Commercial UK Ltd | Wholesale & retail | 2020 |
| DK Automotors Limited | Wholesale & retail | 2024 |
| DK Grocery Ltd | Wholesale & retail | 2026 |
| Dkdcoaching Limited | Education | 2021 |
| DKS Property Investment Ltd | Real estate | 2025 |
| DKS Services Ltd | Construction | 2022 |
| DKW Design Limited | Other services | 2008 |
| DL Fountain Group Ltd | Manufacturing | 2020 |
| Dlink Services Limited | Extraterritorial | 2025 |
| DLT Developments (UK) Limited | Construction | 2014 |
| DLU Trans Limited | Transport & logistics | 2025 |
| DM & AM Holdings Limited | Financial services | 2020 |
| DM2 Limited | Hospitality | 2023 |
| DM3T Property Ltd | Real estate | 2020 |
| DMC Fire Protection Ltd | Construction | 2020 |
| DMH Commercials Ltd | Wholesale & retail | 2022 |
| Dmitrijpal Ltd | Transport & logistics | 2026 |
| DMN Driving Services Ltd | Transport & logistics | 2021 |
| Dmpi Limited | Real estate | 2014 |
| DMR Asset Management Ltd | Wholesale & retail | 2022 |
| DMT Plastering Ltd | Construction | 2019 |
| DMTR7 Property Group Ltd | Real estate | 2026 |
| DMV (SPV) Ltd | Construction | 2022 |
| DNC Engineering Limited | Manufacturing | 2016 |
| DND Global Removals Ltd | Transport & logistics | 2021 |
| DNI Data & Electrical Installations Limited | Construction | 2009 |
| DNL Utilities Ltd | Construction | 2019 |
| DNM Property Management Limited | Real estate | 2022 |
| DNM Rental Limited | Real estate | 2023 |
| DNS Investments Limited | Real estate | 2019 |
| DNV Patel Ltd | Real estate | 2023 |
| Doar Limited | Households | 2024 |
| Dobry Konrad Ltd | Transport & logistics | 2022 |
| Docdynamics Solutions Ltd | Professional & scientific | 2025 |
| Dock Property Holdings Ltd | Real estate | 2025 |
| Doctor Dipson Limited | Health & social care | 2019 |
| Doctor Gage Ltd | Health & social care | 2024 |
| Doctor Scrub Limited | Administrative & support | 2025 |
| Doctors 4 U Limited | Health & social care | 2009 |
| DOD Electrical Limited | Construction | 2019 |
| Doggy Stylz Dog Grooming Ltd | Other services | 2022 |
| Doherty Building Services Limited | Construction | 1998 |
| Doherty Plant Services Limited | Administrative & support | 2008 |
| DOI Consultancy Group UK Limited | Information & communication | 2025 |
| Doigum Ltd | Wholesale & retail | 2025 |
| DOKANDIS90 Ltd | Wholesale & retail | 2024 |
| Doks Plant Operators&Security Ltd | Construction | 2018 |
| Dolledbydots Limited | Other services | 2024 |
| Dolls & Dudes Hair & Beauty Limited | Other services | 2016 |
| Dolphin Autos Limited | Wholesale & retail | 2023 |
| Dolsun Ltd | Real estate | 2025 |
| DOM Fibre One Solutions Limited | Construction | 2026 |
| Domain Recovery Limited | Information & communication | 1992 |
| Domain Trace Ltd | Information & communication | 2005 |
| Dome Property Management Limited | Real estate | 2023 |
| Domenico Brancato Handyman Ltd | Construction | 2026 |
| Domestic Services Hackney Ltd | Administrative & support | 2015 |
| Domexa Ltd | Real estate | 2025 |
| Domic Limited | Real estate | 2017 |
| Domica Care Ltd | Health & social care | 2025 |
| Domicile Services Limited | Other services | 2020 |
| Domingo Limited | Real estate | 2023 |
| Dominion City Luton Ltd | Other services | 2022 |
| Dominion City Rltts Ltd | Other services | 2021 |
| Dominion City Watford Ltd | Other services | 2024 |
| Dominion Divine Care UK Ltd | Administrative & support | 2021 |
| Dominion Residential Ltd | Hospitality | 2023 |
| Dominionaire Academies CIC | Arts & recreation | 2025 |
| Domixuk Ltd | Construction | 2023 |
| Domo Trans WGC Limited | Transport & logistics | 2020 |
| Domus Optimus Limited | Real estate | 2025 |
| Domus Revultio Limited | Wholesale & retail | 2025 |
| DON 1 Media Limited | Information & communication | 2024 |
| DON Logistik Ltd | Construction | 2018 |
| Dondonduff Limited | Administrative & support | 2020 |
| Done Services Limited | Construction | 2002 |
| Donegal Plastering Limited | Construction | 2016 |
| Dong Estates Ltd | Real estate | 2023 |
| Dong GIA Property Limited | Real estate | 2024 |
| Donna Fabiola Ltd | Wholesale & retail | 2025 |
| Donna's House of Beauty Limited | Other services | 2022 |
| Door 2 Door Cargo Ltd | Transport & logistics | 2019 |
| Door to Door Travel Ltd | Transport & logistics | 2014 |
| Doorstep Dolci High Street Ltd | Hospitality | 2023 |
| Doortostore Ltd | Transport & logistics | 2018 |