| D.D. Cooling EOT Limited | Extraterritorial | 2021 |
| D.D. Cooling Limited | Construction | 2007 |
| D.F.J. Automotive Limited | Wholesale & retail | 1992 |
| D.G. Engineering Co. Limited | Professional & scientific | 1973 |
| D.G.M. Milk & Dairy Limited | Wholesale & retail | 2006 |
| D.H. Motors Limited | Manufacturing | 2007 |
| D.J. & C.A. Services Ltd | Information & communication | 2010 |
| D.K.V. Properties Limited | Real estate | 1999 |
| D.S. Wight & SON Limited | Wholesale & retail | 2002 |
| D.T. Oracz Limited | Construction | 1982 |
| D.U.S Networks Limited | Construction | 2018 |
| D.W. Wood Ltd | Administrative & support | 2002 |
| D2 Software Ltd | Information & communication | 2025 |
| D24 Consulting Limited | Professional & scientific | 2024 |
| D8RNODE Ltd | Information & communication | 2022 |
| DA and CA Property Limited | Real estate | 2024 |
| DA Travonistar Ltd | Administrative & support | 2026 |
| Daaddison Limited | Wholesale & retail | 2023 |
| DAC Telecomms Ltd | Information & communication | 2025 |
| Dacrelands Limited | Health & social care | 2002 |
| Dada (Carlisle) Limited | Other services | 2005 |
| Dadmrd Ltd | Hospitality | 2002 |
| Daeo Tenz Ltd | Wholesale & retail | 2025 |
| DAF Aesthetics Limited | Wholesale & retail | 2025 |
| Daggen Green Ltd | Professional & scientific | 2025 |
| Dagger Electrical Services Ltd | Construction | 2019 |
| Dagger Peptides Ltd | Wholesale & retail | 2026 |
| DAH Agents Ltd | Financial services | 2024 |
| Dahlia Security Innovation Ltd | Information & communication | 2026 |
| Daia Limited | Wholesale & retail | 2016 |
| Daily Deal Offers Limited | Extraterritorial | 2023 |
| Daily Equilibrium Ltd | Health & social care | 2025 |
| Daily Needs Market Ltd | Wholesale & retail | 2026 |
| Daim Consultancy Ltd | Professional & scientific | 2019 |
| Daimler Classics UK Ltd | Wholesale & retail | 2024 |
| Dairy Land UK Limited | Professional & scientific | 2013 |
| Dairy Parts Direct Ltd | Professional & scientific | 2024 |
| Daisy Clough Nurseries Limited | Wholesale & retail | 2013 |
| Daisy Home Designs Ltd | Manufacturing | 2018 |
| Daisy Optical Ltd | Wholesale & retail | 2026 |
| Daisybrook (Holdings) Ltd | Real estate | 2010 |
| Dakav Properties (NW) Ltd | Households | 2021 |
| Dakol Limited | Information & communication | 2000 |
| DAL Autodynamics Limited | Wholesale & retail | 2003 |
| Dalara Integrated Services Limited | Administrative & support | 2025 |
| Dalcom Limited | Other services | 2025 |
| Dale .a. Craven (Joiners) Ltd | Construction | 2002 |
| Dalesview Leisure Ltd | Hospitality | 2015 |
| Dalston Property Ltd | Construction | 2016 |
| Dalton & Woods Consulting Limited | Professional & scientific | 2024 |
| Dalton Court (Blackburn) Management Company Limited | Real estate | 2013 |
| Dalton Investments Limited | Real estate | 2012 |
| Dalton Maison Ltd | Construction | 2022 |
| Dalton Medical Services Limited | Health & social care | 2012 |
| Dalton Morgan Ltd | Construction | 2017 |
| DAM Cheap Bikes Ltd | Wholesale & retail | 2015 |
| DAM Good Property Ltd | Real estate | 2021 |
| Damak Recruitment Solution Limited | Administrative & support | 2025 |
| Damascus Cafe a Limited | Hospitality | 2023 |
| Damian LEE Building Limited | Construction | 2002 |
| Damian Smith Limited | Construction | 2002 |
| Damtrad Limited | Wholesale & retail | 1991 |
| DAN Atofanei Ltd | Transport & logistics | 2025 |
| DAN RAY Building Services Limited | Administrative & support | 2007 |
| DAN Rend Ltd | Construction | 2026 |
| DAN Walmsley Ltd | Health & social care | 2018 |
| DAN Warburton Ltd | Transport & logistics | 2026 |
| DAN YUM Ltd | Hospitality | 2025 |
| Dana&Sergiu Ltd | Transport & logistics | 2023 |
| Dancers Preston Limited | Arts & recreation | 2012 |
| Dancetc Ltd | Arts & recreation | 2023 |
| Danceworx Preston & Garstang (Holdings) Limited | Real estate | 2025 |
| Danceworx Preston & Garstang Ltd | Education | 2023 |
| Danco Holdings Limited | Financial services | 2022 |
| Dandelion Therapy Limited | Health & social care | 2025 |
| Dandosh Medical Services Limited | Health & social care | 2013 |
| Danelo Group Ltd | Wholesale & retail | 2024 |
| Dangerous Dave Ltd | Real estate | 2019 |
| Daniel James Cassidy Plastering Ltd | Construction | 2015 |
| Daniel Redfern Limited | Health & social care | 2010 |
| Daniels Holdings Ltd | Financial services | 2022 |
| Dannick Limited | Information & communication | 2026 |
| Dannies Deli Limited | Hospitality | 2025 |
| Danny Enterprise Ltd | Wholesale & retail | 2025 |
| Danny Gilbert Cricket Limited | Arts & recreation | 2021 |
| Danta Joinery Limited | Construction | 2017 |
| Dantes Italian Takeaway Limited | Hospitality | 2003 |
| Danvic Turfcare Limited | Administrative & support | 2001 |
| Danwil Ltd | Real estate | 2021 |
| Dany's Kitchen Ltd | Hospitality | 2023 |
| Danyadi Event Solutions Ltd | Arts & recreation | 2026 |
| Daraa Ltd | Mining & quarrying | 2026 |
| Darbyshire and Horabin Limited | Transport & logistics | 1961 |
| Darbyshire Group Limited | Financial services | 2021 |
| Darbyshire Real Estate Ltd | Real estate | 2026 |
| Dardsley Medical Limited | Health & social care | 2022 |
| Darek Builders Limited | Construction | 2020 |
| Darios Takeaway Limited | Hospitality | 2024 |
| Darley Joinery Contractors Limited | Construction | 2003 |
| Darley Regen Limited | Real estate | 2017 |