| Digital Investment Limited | Information & communication | 2024 |
| Digital Medicines Consulting Ltd | Health & social care | 2018 |
| Digital Technology and Engineering Solutions Ltd | Professional & scientific | 2024 |
| Digitize Fusion Limited | Information & communication | 2020 |
| Dijon Logistics Management Limited | Professional & scientific | 1996 |
| Dilemani Properties LLP | | 2024 |
| Dilhan Hanif Ltd | Manufacturing | 2020 |
| Dilton Capital UK Limited | Real estate | 2026 |
| DIP Bookkeeping and Financial Consultancy Ltd | Professional & scientific | 2020 |
| Direct Green Power Ltd | Construction | 2025 |
| Discover Pearls Ltd | Manufacturing | 2018 |
| Distinct Maintenance Services Ltd | Administrative & support | 2012 |
| Diva Business Consulting Limited | Professional & scientific | 2020 |
| Diversity Enterprises Ltd | Health & social care | 2015 |
| Divine Projects Limited | Professional & scientific | 2016 |
| DJ Drugs Expert Witness Limited | Administrative & support | 2017 |
| DJC Squared Investments Limited | Real estate | 2021 |
| DJM Groundwork and Utilities Limited | Construction | 2020 |
| DK2N Media Ltd | Professional & scientific | 2025 |
| DKA WIN Ltd | Real estate | 2020 |
| DLJ Investments Ltd | Real estate | 2025 |
| DMS Maintenance Limited | Construction | 2025 |
| DMT Ventures Ltd | Professional & scientific | 2025 |
| DND Paintworks Ltd | Construction | 2020 |
| DO IT Summits Ltd | Manufacturing | 2024 |
| Do.Mech ENG Ltd | Professional & scientific | 2024 |
| Doble Court Residents Management Company Limited | Real estate | 1990 |
| DOC Beauty Ltd | Wholesale & retail | 2024 |
| Dodi Ltd | Manufacturing | 2024 |
| Dog EAR Studio Ltd | Professional & scientific | 2026 |
| Dogucak Kebab Limited | Hospitality | 2019 |
| Domifort Solutions Limited | Information & communication | 2026 |
| Donnelly Trading Limited | Wholesale & retail | 2025 |
| Doolalis Bar and Restaurant Ltd | Hospitality | 2024 |
| Dorag Ltd | Professional & scientific | 2025 |
| Dorset Marine Engineering Limited | Manufacturing | 2022 |
| Dosaflavour Ltd | Hospitality | 2025 |
| Doshi Restaurants Ltd | Hospitality | 2025 |
| Double a Vision Ltd | Information & communication | 2016 |
| Double-Take Productions Limited | Information & communication | 1999 |
| DOUBLE7 Technology Ltd | Wholesale & retail | 2024 |
| Doublethink Limited | Professional & scientific | 2008 |
| Doughty European Limited | Construction | 2001 |
| Douglas Travel Coaches Ltd | Transport & logistics | 2021 |
| Dove Property Services Ltd | Households | 2019 |
| Doveton Road RTM Company Limited | Households | 2017 |
| Downham Express DRY Cleaners Limited | Other services | 2017 |
| DPJ Electricians Limited | Construction | 2014 |
| Dpsrc Limited | Information & communication | 2015 |
| DPZ Properties Limited | Real estate | 2025 |
| DR a N Sulke Ltd | Extraterritorial | 2010 |
| DR Anna Bridgens Paediatric Orthopaedics Ltd | Health & social care | 2025 |
| DR F M Rahman Ltd | Health & social care | 2017 |
| DR K a Vaithilingam Limited | Health & social care | 2021 |
| DR Patel 6 Gaam Construction Limited | Construction | 2019 |
| DR Watsons (Softdrinks) Limited | Wholesale & retail | 2011 |
| Dr&Fastparcel Ltd | Transport & logistics | 2019 |
| Drae Electrical Limited | Construction | 2018 |
| Dragon Retail 316 Limited | Wholesale & retail | 2025 |
| Dragon Retail 320 Limited | Wholesale & retail | 2025 |
| Dragon Retail 329 Limited | Wholesale & retail | 2025 |
| Dragon Retail 331 Limited | Wholesale & retail | 2025 |
| Dragon Retail 506 Limited | Wholesale & retail | 2025 |
| Dragon Retail 508 Limited | Wholesale & retail | 2025 |
| Dragon Retail 509 Limited | Wholesale & retail | 2025 |
| Dragon Retail 512 Limited | Wholesale & retail | 2025 |
| Dragon Retail 513 Limited | Wholesale & retail | 2025 |
| Dragon Retail 514 Limited | Wholesale & retail | 2025 |
| Dragon Retail 522 Limited | Wholesale & retail | 2025 |
| Dragon Retail 523 Limited | Wholesale & retail | 2025 |
| Dragon Retail 530 Limited | Wholesale & retail | 2025 |
| Dragon Retail 534 Limited | Wholesale & retail | 2025 |
| Dragon Retail 535 Limited | Wholesale & retail | 2025 |
| Dragon Retail 540 Limited | Wholesale & retail | 2025 |
| Dragon Retail 542 Limited | Wholesale & retail | 2025 |
| Dragon Retail 545 Limited | Wholesale & retail | 2025 |
| Dragon Retail 562 Limited | Wholesale & retail | 2025 |
| Dragon Retail 567 Limited | Wholesale & retail | 2025 |
| Dragon Retail 569 Limited | Wholesale & retail | 2025 |
| Dragon Retail 570 Limited | Wholesale & retail | 2025 |
| Dragon Retail 705 Limited | Wholesale & retail | 2025 |
| Dragon Retail 707 Limited | Wholesale & retail | 2025 |
| Dragon Retail 708 Limited | Wholesale & retail | 2025 |
| Dragon Retail 709 Limited | Wholesale & retail | 2025 |
| Dragon Retail 712 Limited | Wholesale & retail | 2025 |
| Dragon Retail 714 Limited | Wholesale & retail | 2025 |
| Dragon Retail 715 Limited | Wholesale & retail | 2025 |
| Dragon Retail 718 Limited | Wholesale & retail | 2025 |
| Dragon Retail 720 Limited | Wholesale & retail | 2025 |
| Dragon Retail 721 Limited | Wholesale & retail | 2025 |
| Dragon Retail 808 Limited | Wholesale & retail | 2025 |
| Dragon Retail 824 Limited | Wholesale & retail | 2025 |
| Draper Collective Ltd | Arts & recreation | 2025 |
| Dreams Property London Limited | Real estate | 2025 |
| Drift Outlaws Events Limited | Arts & recreation | 2015 |
| Drink & Snack Limited | Hospitality | 2009 |
| Drinks on TAP Limited | Hospitality | 2017 |
| Drive 4 Days Rentals Ltd | Transport & logistics | 2022 |
| Drive LUX Sourcing Limited | Wholesale & retail | 2008 |
| Dropion Ltd | Wholesale & retail | 2023 |