| Doublevision Conditioning Limited | Arts & recreation | 2011 |
| Dough IT Pizza Limited | Hospitality | 2025 |
| Douglas Business School Limited | Education | 2020 |
| Douglas Developments Limited | Real estate | 2023 |
| Downstream Petro-Link Limited | Manufacturing | 2021 |
| Doyle Boland Property Services Ltd | Construction | 2025 |
| DPB Brickwork Limited | Construction | 2007 |
| DPB Property Services Limited | Real estate | 2017 |
| DPH Building Services Limited | Construction | 2015 |
| DPS Clinical Ltd | Professional & scientific | 2023 |
| DR Azeem Medics Ltd | Health & social care | 2023 |
| DR Dray Academy Limited | Education | 2024 |
| DR Nosina Freelance Locum Limited | Health & social care | 2021 |
| DR Parry Corporate Advisory LLP | | 2025 |
| DR R Raha Ltd | Real estate | 2022 |
| DR Rebecca Brady Medical Services Limited | Health & social care | 2026 |
| DR Rehman Healthcare Limited | Health & social care | 2026 |
| DR Rupal Ltd | Health & social care | 2023 |
| DR Shaikh Consultancy Limited | Health & social care | 2018 |
| DR Silvia Pierini Limited | Health & social care | 2018 |
| DR Sophia Health Ltd | Health & social care | 2026 |
| DR. Poojary Ltd | Health & social care | 2011 |
| DR9 Ltd | Information & communication | 2020 |
| DRA Business Services Limited | Professional & scientific | 2016 |
| Dragon and Horse Ltd | Other services | 2020 |
| Dragon FLY Bedford Ltd | Hospitality | 2024 |
| Dragonfleetuk Ltd | Transport & logistics | 2021 |
| Dragonstar Protection Services Limited | Agriculture & fishing | 2026 |
| Dragonswood Timber Products Limited | Manufacturing | 2013 |
| Dragos Express Wash Ltd | Administrative & support | 2022 |
| Drakes Courtyard Management Company Limited | Professional & scientific | 1991 |
| Dream Drive Limited | Transport & logistics | 2025 |
| Dream Fuels Ltd | Transport & logistics | 2025 |
| Dream Home Trading Ltd | Wholesale & retail | 2026 |
| Dream Living and Accessories Ltd | Wholesale & retail | 2026 |
| Dream Living Real Estate Ltd | Real estate | 2021 |
| Dream Marketing Solutions Ltd | Professional & scientific | 2026 |
| Dreamer Enterprise Ltd | Manufacturing | 2016 |
| Dreamers Global Ltd | Health & social care | 2015 |
| Dreamers Glory Media Ltd | Information & communication | 2021 |
| Dreamprize Ltd | Wholesale & retail | 2025 |
| Dreamvv Limited | Manufacturing | 2026 |
| Dreamwear Ltd | Manufacturing | 2011 |
| Dreamweld Ltd | Manufacturing | 2021 |
| Dressmakersoho Limited | Manufacturing | 2021 |
| DRI Services Limited | Administrative & support | 2006 |
| Drift Electrical Limited | Construction | 2025 |
| Driftwood Grid Services Ltd | Construction | 2024 |
| Drillex Ltd | Construction | 2026 |
| Dring Associates B.V. | | 1984 |
| Drip Details Ltd | Wholesale & retail | 2025 |
| Drip Thrive Ltd | Health & social care | 2025 |
| Drive Direct Bedford Ltd | Wholesale & retail | 2025 |
| Drive Doctors Ltd | Education | 2019 |
| Drive Like a Boss Limited | Education | 2021 |
| Drive Pro Intensives Ltd | Education | 2025 |
| Drivesafeuk Ltd | Transport & logistics | 2016 |
| Driveteam Limited | Wholesale & retail | 2006 |
| Drivezy Ltd | Wholesale & retail | 2026 |
| Driving Test Dates UK Ltd | Professional & scientific | 2022 |
| Drjasonreddy Medical Services Ltd | Health & social care | 2025 |
| DRK Logistic Transport Ltd | Transport & logistics | 2019 |
| DRM Pro Engineering Limited | Administrative & support | 2004 |
| Drnuk Ltd | Other services | 2023 |
| Drone Star Media Ltd | Information & communication | 2021 |
| Droneranger Trading Limited | Wholesale & retail | 2012 |
| Droneshotdiaries Ltd | Professional & scientific | 2026 |
| DRS. Direct Limited | Administrative & support | 2007 |
| Drubel Limited | Professional & scientific | 2001 |
| Drum Office Services Limited | Information & communication | 2016 |
| Drury Holidays Limited | Administrative & support | 2015 |
| Drwellness Healthcare Limited | Health & social care | 2024 |
| DRY Fit Solutions Limited | Construction | 2007 |
| Drylinexpert Ltd | Construction | 2025 |
| Drystone Strategy Partners Limited | Professional & scientific | 2016 |
| DRZAHEER82 Ltd | Health & social care | 2025 |
| DS Pro Developments Limited | Construction | 2009 |
| DS Safety Training Ltd | Other services | 2017 |
| DSA Guard Ltd | Administrative & support | 2023 |
| DSA SRV Ltd | Construction | 2025 |
| DSA Suppliers Ltd | Wholesale & retail | 2019 |
| DSA Transport Ltd | Transport & logistics | 2023 |
| DSB Group Limited | Construction | 2020 |
| DSC Property Ltd | Real estate | 2025 |
| DSF Property Holdings Ltd | Real estate | 2025 |
| DSG Franklin Ltd | Transport & logistics | 2007 |
| Dsrobotics Ltd | Professional & scientific | 2026 |
| DSV Accounting & Business Services Ltd | Professional & scientific | 2017 |
| Dtba Courier Services Ltd | Transport & logistics | 2018 |
| DTC Express Ltd | Transport & logistics | 2026 |
| DTH Abseiling and Property Services Limited | Administrative & support | 2023 |
| DTJ Property Services Ltd | Real estate | 2022 |
| DTP Consulting Ltd | Information & communication | 2013 |
| DTR Development Ltd | Construction | 2019 |
| Dual Group Services Ltd | Construction | 2017 |
| Duality Theatre Company Ltd | Arts & recreation | 2018 |
| Dubmaster Ltd | Professional & scientific | 2006 |
| Ducal Ltd | Professional & scientific | 2025 |
| Duckmill Consulting Limited | Professional & scientific | 2024 |
| Duckpaddle Publishing Ltd | Information & communication | 2013 |