| Disputed Claims Limited | Administrative & support | 2019 |
| District Digital Limited | Information & communication | 2023 |
| Diuc Agus Banphrionsai Limited | Real estate | 2002 |
| Divas of Cerrito Productions Limited | Information & communication | 2022 |
| Dive Agency Limited | Extraterritorial | 2025 |
| Divergent Health Ltd | Health & social care | 2025 |
| Diversion Traffic Services Limited | Administrative & support | 2019 |
| Diya Market Research Ltd | Professional & scientific | 2025 |
| Dizzy Fashions Ltd | Wholesale & retail | 2003 |
| DJ Classics Limited | Wholesale & retail | 2016 |
| Dj-Dc-Mh-Dandy Ltd | Other services | 2026 |
| Djandcocreative Ltd | Professional & scientific | 2025 |
| Djbh Associates Limited | Extraterritorial | 2010 |
| DJL Property Investments Ltd | Real estate | 2017 |
| DK Advisors Limited | Professional & scientific | 2014 |
| Dkms Worldwide Ltd | Real estate | 2024 |
| DKS Morrisons Ltd | Wholesale & retail | 2023 |
| Dlip Ltd | Financial services | 2022 |
| DLN Online Ltd | Wholesale & retail | 2025 |
| DM Prime Investment Ltd | Real estate | 2026 |
| DMC Consulting Engineers Limited | Professional & scientific | 1992 |
| Dmer Limited | Hospitality | 2018 |
| Dmrg Tech Limited | Information & communication | 2017 |
| DMS Bodyworks Ltd | Wholesale & retail | 2022 |
| DMS Car Sales Ltd | Wholesale & retail | 2026 |
| DN Nutrition Consultancy Limited | Health & social care | 2020 |
| DNA Boundary & Party Wall Solutions Ltd | Professional & scientific | 2024 |
| DNJ Developments Ltd | Construction | 2025 |
| DNM LDN Ltd | Wholesale & retail | 2021 |
| DNT Futures Ltd | Real estate | 2019 |
| Doay Properties Ltd | Real estate | 2025 |
| DOB Procurement Services Ltd | Other services | 2025 |
| Doceo Group Limited | Information & communication | 2020 |
| Doculex Limited | Manufacturing | 2004 |
| DOD Investments Ltd | Real estate | 2020 |
| Dogiz UK Limited | Information & communication | 2018 |
| Dokkodo Limited | Administrative & support | 2020 |
| DOL Engineering Services Limited | Construction | 2019 |
| Dolphin & Seel Consulting Limited | Professional & scientific | 2010 |
| DOM Roberts Limited | Information & communication | 2018 |
| Dome Capital Ltd | Real estate | 2013 |
| Domi Health Ltd | Health & social care | 2024 |
| Dominant Motoring (UK) Limited | Other services | 2011 |
| Dominion Tender Care Support Services Ltd | Health & social care | 2025 |
| Domus Art Ltd | Construction | 2016 |
| Donard Limited | Construction | 2000 |
| Doncaster Capital Limited | Professional & scientific | 2011 |
| Door Security Systems Limited | Administrative & support | 1993 |
| Doorbroker Limited | Wholesale & retail | 2018 |
| Doors Direct (London) Limited | Construction | 2004 |
| Doorstep Dairy Ltd | Wholesale & retail | 2018 |
| Doorstep Plumbers Ltd | Construction | 2025 |
| Dopsil Ltd | Wholesale & retail | 2025 |
| Dorchester Investments Limited | Real estate | 2003 |
| Dorchester Partners Ltd | Professional & scientific | 2022 |
| Doreen Fashion | Professional & scientific | 2006 |
| Doreen Fashions Limited | Wholesale & retail | 1999 |
| Doreen Limited | Administrative & support | 2003 |
| Doreens Fashions Limited | Administrative & support | 2003 |
| Doreens Limited | Administrative & support | 2005 |
| Dorians Plumbing & Heating Ltd | Energy | 2019 |
| Dorset Trading and MGT Limited | Transport & logistics | 2018 |
| DOT Notation Limited | Information & communication | 2018 |
| Double Infinity Ltd | Administrative & support | 2013 |
| Double U Ltd | Professional & scientific | 2016 |
| Douglas Charles Builders Limited | Construction | 2008 |
| Douglas-White & Gosai Limited | Information & communication | 2015 |
| Dove Professional Services Ltd | Professional & scientific | 2018 |
| Dovebay Limited | Real estate | 2002 |
| Dover Citadel Ltd | Construction | 2020 |
| Down the PUB on ME Bike Ltd | Hospitality | 2018 |
| Downboy Entertainment Group Limited | Information & communication | 2021 |
| Downboy Global Limited | Information & communication | 2015 |
| Downboy Media Ltd | Arts & recreation | 1994 |
| DP Medical Holdings Limited | Financial services | 2019 |
| DP Property Consultancy Limited | Real estate | 2022 |
| DPH Contracts Ltd | Construction | 2023 |
| DPM Stage & Screen Services Limited | Arts & recreation | 2016 |
| DPP 265 Ltd | Real estate | 2021 |
| DR Ashish Investments Ltd | Real estate | 2022 |
| DR Christina Cunliffe Ltd | Health & social care | 2003 |
| DR D Jain Limited | Health & social care | 2001 |
| DR D Lindsay Limited | Health & social care | 2023 |
| DR K Media Limited | Wholesale & retail | 2015 |
| DR M Seevaratnam Limited | Health & social care | 2009 |
| DR Saurabh Adlakha Ltd | Health & social care | 2015 |
| DR Stephanie Oiknine Limited | Health & social care | 2015 |
| DR VAS Aesthetics Ltd | Health & social care | 2024 |
| DR VAS Group Ltd | Financial services | 2024 |
| DR Wolf Ltd | Wholesale & retail | 2021 |
| DR. Ashish Ltd | Health & social care | 2017 |
| DR. Decorator Ltd | Construction | 2015 |
| DR. Taps Ltd | Construction | 2025 |
| DRA Digi COM Limited | Information & communication | 2024 |
| Draft Edit Ltd | Administrative & support | 2025 |
| Drago Scorpions Ltd | Arts & recreation | 2015 |
| Dragon Drop Metagaming Ltd | Information & communication | 2023 |
| Dragon Global Ltd | Transport & logistics | 2020 |
| Dragonweb Limited | Information & communication | 2025 |
| DRB INT Limited | Other services | 2013 |