| Daniel Malsbury + Co Ltd | Financial services | 2013 |
| Daniel Naprous Ltd | Arts & recreation | 2013 |
| Daniel's Property Investment 25 Ltd | Real estate | 2025 |
| Daniel-Vjy Trans Limited | Wholesale & retail | 2021 |
| Danielchantel Limited | Hospitality | 2020 |
| Danielle Hicks Spmu Ltd | Other services | 2018 |
| Danielle J Hahn Therapy Ltd | Health & social care | 2019 |
| Danielpaulson Investment Ltd | Construction | 2019 |
| Daniels Style Ltd | Other services | 2017 |
| Daniel’S Property Maintenance London Ltd | Construction | 2025 |
| Daniyal Driving School Ltd | Education | 2025 |
| Danjo Real Estate Limited | Real estate | 2025 |
| Danjoa Limited | Health & social care | 2025 |
| Dank Ltd | Transport & logistics | 2024 |
| Danlore Limited | Administrative & support | 2014 |
| Danmag Ltd | Information & communication | 2015 |
| Danmotorsmk Ltd | Wholesale & retail | 2024 |
| Dannie LEO Ltd | Professional & scientific | 2024 |
| Dansonosborne Accountants Limited | Professional & scientific | 2019 |
| Dansonosborne Properties Ltd | Real estate | 2020 |
| Dantoo Ltd | Information & communication | 2017 |
| Danum Equine Management Limited | Arts & recreation | 2024 |
| Danvan Services Ltd | Manufacturing | 2019 |
| Danvi Ltd | Professional & scientific | 2025 |
| DAO CAI MEI Ltd. | Wholesale & retail | 2025 |
| DAO Properties Limited | Real estate | 2020 |
| Dapa Recruitment Limited | Professional & scientific | 2024 |
| Daphne Property Investment Consultancy Ltd | Financial services | 2020 |
| Daphne Ventures Limited | Administrative & support | 2021 |
| Daphne's Garden & Tree Care Ltd | Administrative & support | 2024 |
| DAR 32 Ltd | Professional & scientific | 2024 |
| DAR Alfaisal Business Group Ltd | Administrative & support | 2017 |
| DAR Alfikr Printing and Publishing Ltd | Information & communication | 2017 |
| DAR Haulage Limited | Transport & logistics | 2016 |
| Dares Networks Ltd | Construction | 2021 |
| Dari Food Ltd | Hospitality | 2025 |
| Daria Para Limited | Hospitality | 2025 |
| Daria Trading Ltd | Transport & logistics | 2017 |
| Dario Alex Ltd | Transport & logistics | 2014 |
| Dark Bay Limited | Wholesale & retail | 2026 |
| Dark Forge Audio Ltd | Professional & scientific | 2024 |
| Dark Hours (MK) Social Ltd | Hospitality | 2015 |
| Dark Nexus Ltd | Administrative & support | 2025 |
| Dark Red Inc Limited | Information & communication | 2014 |
| Dark Shark Consulting Ltd | Administrative & support | 2017 |
| Dark Side Consulting Limited | Professional & scientific | 2007 |
| Darkened Tanning Studios Ltd | Other services | 2024 |
| Darleys Restaurant & Terrace Limited | Hospitality | 2019 |
| Darlington House Management Company Limited | Households | 2007 |
| Darrell Engineering Limited | Manufacturing | 2014 |
| Darren Croucher Ltd | Professional & scientific | 2019 |
| Darren James Property Rentals Limited | Administrative & support | 2024 |
| Darts Retail UK Ltd | Wholesale & retail | 2026 |
| Darudan Publishing Limited | Information & communication | 2016 |
| Darvie Ltd | Real estate | 2020 |
| Darwin Trade Limited | Wholesale & retail | 2026 |
| DAS Technologies Limited | Information & communication | 2022 |
| Dash 4 Deals Ltd | Wholesale & retail | 2025 |
| Dash Impact CIC | Education | 2026 |
| Dash Supplements Limited | Manufacturing | 2025 |
| Dasha Ltd | Administrative & support | 2024 |
| Dashi Cleaning Products Ltd | Manufacturing | 2026 |
| Daso Solutions Ltd | Wholesale & retail | 2016 |
| Dasoul Ltd | Financial services | 2026 |
| Dass DRY Cleaners Ltd | Wholesale & retail | 2012 |
| Dass Legal Solutions (MK) Law Limited | Real estate | 2012 |
| Dastaan Films PVT Ltd | Information & communication | 2022 |
| Data Center Precision Limited | Information & communication | 2024 |
| Data House Consulting Limited | Information & communication | 2007 |
| Data Images | | 1994 |
| Data JAR Ltd | Information & communication | 2013 |
| Data Science Education Ltd | Information & communication | 2021 |
| Data World Experts Ltd | Information & communication | 2026 |
| Data Yield Limited | Information & communication | 2023 |
| Databraid Limited | Information & communication | 2024 |
| Datamatics Business Solutions UK Limited | Professional & scientific | 2008 |
| Datamatics Infotech Limited | Information & communication | 2003 |
| Datapace Limited | Transport & logistics | 1990 |
| Datapace Properties Limited | Extraterritorial | 2007 |
| Datapointe Limited | Information & communication | 2023 |
| Datapro Tech Limited | Information & communication | 2023 |
| Datasenz Limited | Education | 2011 |
| Datawords UK Limited | Information & communication | 2021 |
| Dates Gallery Ltd | Wholesale & retail | 2020 |
| Datron Technology EOT Limited | Administrative & support | 2020 |
| Datron Technology Limited | Wholesale & retail | 1990 |
| Datta Ayansh Limited | Professional & scientific | 2025 |
| Datum CAD Services Limited | Professional & scientific | 2003 |
| Daughters of Khadijah Limited | Other services | 2026 |
| Dave & Adam's Card World Ltd | Wholesale & retail | 2025 |
| Dave Gibbons Limited | Arts & recreation | 2004 |
| Dave Handyman Ltd | Construction | 2024 |
| Dave Holes Ltd | Professional & scientific | 2024 |
| Dave Robinson Transport Ltd | Transport & logistics | 2020 |
| Dave's Blinds Limited | Administrative & support | 2019 |
| Dave's Car Services Limited | Wholesale & retail | 2021 |
| Daveglo Limited | Health & social care | 2024 |
| Davenport Group Limited | Financial services | 2004 |
| Davest Properties Limited | Real estate | 2023 |
| Davey’S Healthcare Solutions Ltd | Health & social care | 2022 |