| Dark Horse Studios Ltd | Information & communication | 2011 |
| Darko Alborz Group International Technical Inspection - Incorporating Icas UK Company Limited | Professional & scientific | 2015 |
| Darley Flooring Solutions Ltd | Construction | 2011 |
| Daro Hand Carwash Limited | Administrative & support | 2024 |
| Darousalam Limited | Transport & logistics | 2020 |
| Darrell Malahoo Automotive Ltd | Manufacturing | 2015 |
| Darul Quran Education Ltd | Education | 2025 |
| Darul Shifa Group Ltd | Wholesale & retail | 2024 |
| DAS 1986 Limited | Hospitality | 2025 |
| DAS Auto Electrics Ltd | Wholesale & retail | 2025 |
| DAS Care Limited | Health & social care | 2018 |
| DAS Property Ltd | Hospitality | 2023 |
| Dascaliuc Constructions Ltd | Construction | 2023 |
| Dashmesh Maintenance Limited | Construction | 2014 |
| Dasmas Ltd | Transport & logistics | 2024 |
| Dasto Group Ltd | Construction | 2025 |
| Data Centres Design Ltd | Professional & scientific | 2023 |
| Data Shaker Ltd | Information & communication | 2024 |
| Data Solve Services Ltd | Other services | 2018 |
| Data Sponge Ltd | Information & communication | 2024 |
| Data Tech Digital Ltd | Information & communication | 2015 |
| Data Vanguard Suit Limited | Information & communication | 2022 |
| Dataecon Consulting Ltd | Professional & scientific | 2020 |
| Datalot Ltd | Wholesale & retail | 2026 |
| Datamation Global Ltd | Information & communication | 2024 |
| Datt Studio Ltd | Professional & scientific | 2025 |
| Daud Motors Limited | Transport & logistics | 2016 |
| Daud Travel Limited | Transport & logistics | 2020 |
| Dauphine Estates Ltd | Real estate | 2024 |
| DAV & BRY Ltd | Construction | 2019 |
| DAV78 Limited | Administrative & support | 2026 |
| Davcris Limited | Information & communication | 2016 |
| Dave Anderson Ltd | Real estate | 2025 |
| Dave Paul Communication Solutions Ltd | Construction | 2025 |
| Davella Care Limited | Health & social care | 2023 |
| Davenportpropco Ltd | Real estate | 2025 |
| David and Co OIL and GAS (UK) Services Limited | Wholesale & retail | 2011 |
| David Boler (Exhausts & Tyres) Limited | | 1919 |
| David Constantin Ltd | Transport & logistics | 2022 |
| David Fawzy Groups Ltd | Real estate | 2023 |
| David Horn Communications Limited | Administrative & support | 1985 |
| David Union Ltd | Transport & logistics | 2024 |
| Davidfreeman Transport Ltd | Transport & logistics | 2021 |
| Davidkia Ltd | Administrative & support | 2022 |
| Davies Bros. (Properties) Limited | Real estate | 2002 |
| Davinci Group Services Limited | Professional & scientific | 2026 |
| Davinder 1 Construction Limited | Construction | 2025 |
| Davinderit Ltd | Information & communication | 2026 |
| Davis & Horsler Limited | Information & communication | 2022 |
| Davis Alpha Ltd. | Information & communication | 2023 |
| Davis Jacobson Ltd | Professional & scientific | 2018 |
| Davis Property Group Ltd. | Real estate | 2018 |
| Davison Building Solutions Ltd | Construction | 2013 |
| Davmion Ltd | Transport & logistics | 2019 |
| Dawood Imran Traders Ltd | Wholesale & retail | 2026 |
| Dawoosuk Ltd | Wholesale & retail | 2024 |
| Day Properties 430 Ltd | Real estate | 2024 |
| DAY2DAY IT Limited | Information & communication | 2009 |
| Dayan & ALI Ltd | Administrative & support | 2016 |
| Daybells Healthcare Limited | Administrative & support | 2012 |
| Daybreak Designs Ltd | Professional & scientific | 2026 |
| Dayma Group Ltd | Construction | 2026 |
| Dayo's Sourcing Ltd | Real estate | 2025 |
| Dazzle Care Ltd | Administrative & support | 2025 |
| Dazzyl's UK Ltd | Wholesale & retail | 2021 |
| Dazzyls Kitchen Limited | Hospitality | 2024 |
| DB Family Holdings Limited | Financial services | 2023 |
| DB Forktrucks Ltd | Manufacturing | 2018 |
| Dbcp Group Ltd | Construction | 2022 |
| DBG Trans Logistics Limited | Transport & logistics | 2017 |
| DBILOGISTICS1986 Ltd | Transport & logistics | 2024 |
| DBN Associates Ltd | Professional & scientific | 2019 |
| DBS Department X Ltd | Administrative & support | 2022 |
| DC Codes Limited | Wholesale & retail | 2021 |
| DC Multitrade Solutions Ltd | Construction | 2024 |
| DC Solutions Group Ltd | Administrative & support | 2019 |
| DC01 AB Limited | Professional & scientific | 2024 |
| DC01 at Limited | Professional & scientific | 2024 |
| DC01 Holdings Limited | Financial services | 2024 |
| DC01 JT Limited | Professional & scientific | 2024 |
| DC01 KB Limited | Professional & scientific | 2024 |
| DC01 UK Limited | Real estate | 2022 |
| Dcboilers Ltd | Construction | 2025 |
| Dcdc Construction Limited | Construction | 2026 |
| Dcgujjar Farmhouse Limited | Agriculture & fishing | 2024 |
| DCP Aerotech Services Ltd | Other services | 2024 |
| Dcskettering Ltd | Hospitality | 2018 |
| Dcskettering Services Ltd | Administrative & support | 2025 |
| Dcspizza Ltd | Hospitality | 2016 |
| Dcspizza Services Ltd | Administrative & support | 2025 |
| Ddcn Ltd | Health & social care | 2022 |
| Ddelivery Ltd | Wholesale & retail | 2019 |
| DDF Consultants Ltd | Professional & scientific | 2014 |
| DDI Engineering Limited | Construction | 2024 |
| DDJ Mechanical Services Ltd | Wholesale & retail | 2026 |
| Ddjautos Limited | Wholesale & retail | 2025 |
| Ddrr Limited | Transport & logistics | 2019 |
| Ddsp Transport Ltd | Transport & logistics | 2025 |
| DE - Masta Cleaning Services Ltd | Administrative & support | 2026 |
| DE Luca M Limited | Wholesale & retail | 2003 |