| D&S Limited | Hospitality | 2025 |
| D&Z Drylining Ltd | Construction | 2024 |
| D-E-M-A Holdings Global UK Ltd | Construction | 2022 |
| D-Success Health Care Ltd | Health & social care | 2022 |
| D-Vine Ventures Limited | Information & communication | 2011 |
| D. Hamilton Building Services Limited | Construction | 2016 |
| D.A.Y.S Property Management Ltd | Real estate | 2021 |
| D.A.Y.S Property Services Ltd | Real estate | 2021 |
| D.Bokciu Services Ltd | Construction | 2016 |
| D.Farinto Ltd | Administrative & support | 2016 |
| D.G.H Security Ltd | Construction | 2024 |
| D.J.D. Management Limited | Households | 1984 |
| D28 Limited | Construction | 2024 |
| D2S Group Limited | Real estate | 2020 |
| D2S Investments Limited | Real estate | 2020 |
| DA King Ministries Inc. Ltd | Professional & scientific | 2004 |
| DA Spera Ltd | Other services | 2014 |
| DA Streams Ltd | Construction | 2017 |
| DA11 Thumbs Limited | Hospitality | 2023 |
| DA12 UK Ltd | Real estate | 2020 |
| Dabs Limited | Construction | 2002 |
| Dafe Concepts Limited | Wholesale & retail | 2026 |
| DAG Designs Limited | Professional & scientific | 2019 |
| Dahlton John Limited | Transport & logistics | 2023 |
| Daily Doors FM Limited | Administrative & support | 2026 |
| Daisy Cocktails and Canapés Limited | Hospitality | 2025 |
| Dajz Healthcare Ltd | Health & social care | 2023 |
| Dajz Properties Limited | Real estate | 2021 |
| DAK Motors Services Ltd | Wholesale & retail | 2019 |
| Dale Property Management Limited | Real estate | 2019 |
| Dalefield Healthcare Ltd | Wholesale & retail | 2021 |
| Dalson Properties Ltd. | Real estate | 2020 |
| DAM SHN Properties Ltd | Real estate | 2023 |
| Daman PTY Ltd | Health & social care | 2019 |
| Damen Arena Limited | Wholesale & retail | 2024 |
| Damfadro Ltd | Transport & logistics | 2019 |
| Damms Cleaning Services Limited | Administrative & support | 2020 |
| Danben Ltd | Transport & logistics | 2025 |
| Dancomb Technology Ltd | Information & communication | 2019 |
| Daneholm Limited | Real estate | 2016 |
| Danes Way Ltd | Real estate | 2019 |
| Dangles Hockey Ltd | Manufacturing | 2025 |
| Danica Property Limited | Real estate | 2020 |
| Daniel 84 Ltd | Transport & logistics | 2018 |
| Daniel Repairs Limited | Manufacturing | 2021 |
| Daniel Transport Ltd | Transport & logistics | 2026 |
| Danilesco Ltd | Construction | 2025 |
| Dannetrans Limited | Transport & logistics | 2014 |
| Dannykoko Ltd | Health & social care | 2019 |
| Dannys Custom Paint Limited | Manufacturing | 2021 |
| Dano Trans Limited | Transport & logistics | 2018 |
| Dante Northwest Ltd | Real estate | 2024 |
| Dantro Services Ltd | Wholesale & retail | 2016 |
| Danusia Francis-Reid Limited | Administrative & support | 2023 |
| Dany WST Ltd | Transport & logistics | 2021 |
| Daoo Flourish Limited | Real estate | 2020 |
| Dapper Diamonds Ltd. | Manufacturing | 2025 |
| DAR Logistics Ltd | Transport & logistics | 2014 |
| Darcy Rail Ltd | Other services | 2018 |
| Dard Ltd | Public administration | 2016 |
| Darenth Insulation Limited | Construction | 1989 |
| Darenth Village Park Management Company Limited | Households | 1998 |
| Dario Transport Group Ltd | Transport & logistics | 2025 |
| Dark Angel Technologies Ltd. | Extraterritorial | 2001 |
| Dark Minds Clothing Limited | Wholesale & retail | 2025 |
| Darka Trans Limited | Wholesale & retail | 2017 |
| Darksky Entertainment Ltd | Professional & scientific | 2021 |
| Darlina Farinto Properties Ltd | Real estate | 2017 |
| Darnley Court Residents Company Limited | Households | 2007 |
| Darnley Estates Limited | Administrative & support | 2004 |
| Darnley Road Management Ltd | Real estate | 2015 |
| Darren O'Flynn Limited | Construction | 2014 |
| Dash DOT Architecture Limited | Professional & scientific | 2004 |
| Dash Hound Media Ltd | Information & communication | 2022 |
| Dashnel Limited | Health & social care | 2018 |
| Dasknow Limited | Real estate | 2014 |
| Datacom Cabling Ltd | Information & communication | 1997 |
| Datagproperty Ltd | Construction | 2026 |
| Datagration Ltd | Information & communication | 2001 |
| Datahub Solutions Ltd | Information & communication | 2023 |
| Datech Development Ltd | Real estate | 2023 |
| Davboat FX Trading Ltd | Financial services | 2025 |
| Davdra Estates Limited | Real estate | 2022 |
| David Florin Ltd | Transport & logistics | 2016 |
| David James Partnership Ltd | Administrative & support | 2025 |
| David Stott Accountancy Services Ltd | Professional & scientific | 2022 |
| David Victor Ltd | Manufacturing | 2016 |
| Davies Global Services Ltd | Manufacturing | 2013 |
| Davirose Limited | Wholesale & retail | 2024 |
| Davis Brothers Developments Ltd | Real estate | 2024 |
| Davis Properties Group Ltd | Real estate | 2023 |
| Davt Limited | Construction | 2016 |
| Dawn 2 Dusk Services Limited | Administrative & support | 2026 |
| Dawn and GAV Inns Limited | Hospitality | 2018 |
| Day&Eve Property Ltd. | Real estate | 2024 |
| Daya RAY Interior Ltd | Professional & scientific | 2020 |
| Dayal Consultants Ltd | Professional & scientific | 2014 |
| Dayal Solutions Limited | Real estate | 2022 |
| Dayal Ventures Limited | Real estate | 2024 |
| Days and Weeks Limited | Professional & scientific | 2014 |