| Dosay Clothing Ltd | Wholesale & retail | 2024 |
| DOT to DOT Enterprises Limited | Professional & scientific | 2014 |
| DOT to DOT Technical Ltd | Information & communication | 2022 |
| DOT Ventures Ltd | Real estate | 2025 |
| Double D Manufacturing Ltd | Professional & scientific | 2020 |
| Double D Technologies Limited | Professional & scientific | 2020 |
| Double Dragon Ltd | Hospitality | 2018 |
| Double Swan Limited | Wholesale & retail | 2019 |
| Double Tree Barber Ltd | Other services | 2024 |
| Douglas Lein Consultancy Limited | Wholesale & retail | 2019 |
| Dovedon Productions Ltd | Arts & recreation | 2017 |
| Dovetail Property Group Ltd | Real estate | 2023 |
| Down to Funk Limited | Arts & recreation | 2023 |
| Dowsett Partners Limited | Administrative & support | 2017 |
| Doxar Group Ltd | Wholesale & retail | 2024 |
| Doxazo Branding Limited | Professional & scientific | 2025 |
| Doxford (Building 1) Limited | Real estate | 2002 |
| Doxford (Building 2) Limited | Real estate | 2002 |
| Doxford (Building 3) Limited | Real estate | 2002 |
| Doxrex Asset Management Ltd | Hospitality | 2020 |
| DOZ Mobility Ltd | Transport & logistics | 2025 |
| Dozey Ltd | Information & communication | 2025 |
| DP Kitchens Ltd | Construction | 2023 |
| Dpcs Goods Ltd | Wholesale & retail | 2021 |
| DPM New Builds Ltd | Construction | 2021 |
| DPS Enterprises Ltd | Construction | 2025 |
| DPS Universal Limited | Manufacturing | 1985 |
| DR Beth Mosley Limited | Information & communication | 2023 |
| DR Gemma Jones & Associates Ltd | Health & social care | 2023 |
| DR KAS Clinics Ltd | Health & social care | 2026 |
| DR M Psychological Services Ltd | Health & social care | 2022 |
| DR Mcgibbon Ltd | Education | 2024 |
| DR Paul Jarman Limited | Wholesale & retail | 2020 |
| DR Psychology Services Ltd | Health & social care | 2025 |
| DR Sarah Angullia Ltd | Health & social care | 2025 |
| DR001 Imaging Ltd | Health & social care | 2022 |
| Draft Writing Solutions Ltd | Professional & scientific | 2025 |
| Dragon FLY Insight Limited | Professional & scientific | 2008 |
| Dragon Slayer Legal Prep Ltd | Wholesale & retail | 2024 |
| Dragon Systems Software Limited | Information & communication | 1997 |
| Dragonfly Surveys Limited | Agriculture & fishing | 2024 |
| Drainedin Ltd | Construction | 2024 |
| Drajis Limited | Wholesale & retail | 2025 |
| Drake Accountants Limited | Professional & scientific | 2024 |
| Draven Limited | Information & communication | 2025 |
| Dravina Global Ltd | Wholesale & retail | 2024 |
| DRB Logistics Limited | Real estate | 2021 |
| DRD Logistics Ltd | Transport & logistics | 2020 |
| Dream Care Farm CIC | Agriculture & fishing | 2022 |
| Dream DUO Ltd | Other services | 2026 |
| Dream Jewellery Ltd | Wholesale & retail | 2023 |
| Dream Nexus Ltd | Real estate | 2018 |
| Dream Treading Co. Ltd | Wholesale & retail | 2026 |
| Dream Your Future Families CIC | Health & social care | 2019 |
| Dreamform Developments Ltd | Construction | 2026 |
| Dreams Comes True Ltd | Extraterritorial | 2026 |
| Dreamworth Foods Ltd | Manufacturing | 2026 |
| Dreamy AI Studios Ltd | Information & communication | 2025 |
| Drecwec Ltd | Financial services | 2024 |
| Dredge UK Limited | Transport & logistics | 2025 |
| Drenco Ltd | Wholesale & retail | 2026 |
| Dresspro Fashion Ltd | Wholesale & retail | 2025 |
| Dribl Ltd | Hospitality | 2025 |
| Drift Property Management Ltd | Financial services | 2023 |
| Drilling Fluid Management Systems Limited | Professional & scientific | 1990 |
| Drive and Elevate Ltd | Professional & scientific | 2025 |
| Drive Green Power Ltd | Construction | 2024 |
| Drivebot Ltd | Information & communication | 2024 |
| Drivelink Services Ltd | Transport & logistics | 2025 |
| Drives Results Limited | Professional & scientific | 2016 |
| Driving Devices Limited | Information & communication | 2007 |
| Drivingscout Ltd | Information & communication | 2017 |
| Dropfast Ltd | Wholesale & retail | 2026 |
| Dropmarket Ltd | Wholesale & retail | 2026 |
| Drops of Joy Bar Limited | Hospitality | 2026 |
| Drops of Joy Holding Limited | Financial services | 2026 |
| Dropspeed Ltd | Wholesale & retail | 2026 |
| Drovers Mead (Bury ST Edmunds) Management Company Limited | Households | 2002 |
| Drtutor Ltd | Education | 2024 |
| Drum Discovery Labs CIC | Professional & scientific | 2026 |
| Drummond Equestrian Limited | Education | 2023 |
| Drvnsupps Ltd | Wholesale & retail | 2025 |
| DS Broadcast Services Limited | Information & communication | 2022 |
| Dsbl Property Limited | Construction | 2025 |
| DSC 2014 Limited | Professional & scientific | 2014 |
| Dscribe Limited | Administrative & support | 2004 |
| DSI M&E Limited | Construction | 2008 |
| DSJ Printing Ltd | Manufacturing | 2025 |
| Dsoc Engineering Ltd | Manufacturing | 2017 |
| DTB Enterprises Ltd | Professional & scientific | 2024 |
| DTI Training Ltd | Education | 2018 |
| DTL Property Services Limited | Real estate | 2025 |
| DTL Property Solutions Limited | Real estate | 2025 |
| DTM Systems Ltd | Professional & scientific | 2026 |
| DTS-3PL Ltd | Transport & logistics | 2025 |
| DU Soleil Stud Ltd | Agriculture & fishing | 2020 |
| DU Trade Ltd | Construction | 2021 |
| Duckworth Kitchens Ltd | Construction | 2025 |
| Duclark Ltd | Professional & scientific | 2026 |
| Duella Curl Ltd | Wholesale & retail | 2025 |