| Dltl Estate Ltd | Real estate | 2021 |
| DLW Electrical Engineering Ltd | Construction | 2023 |
| DM Autocare Ltd | Wholesale & retail | 2020 |
| Dm-Softech Consultancy Ltd | Extraterritorial | 2017 |
| DMA Performance Limited | Wholesale & retail | 2016 |
| Dmap Spares Ltd | Wholesale & retail | 2020 |
| DMC Electrical (UK) Limited | Construction | 2012 |
| DMF Construction Services Ltd | Administrative & support | 2025 |
| DMG Plumbing & Heating Limited | Construction | 2014 |
| DML Interiors Ltd | Construction | 2025 |
| DML Performance Limited | Arts & recreation | 2024 |
| Dmrs Lettings Ltd | Real estate | 2018 |
| DMS Industrial Electronics Ltd | Construction | 2013 |
| DN Physiotherapy Ltd | Other services | 2018 |
| DNJ Building Services Limited | Manufacturing | 2013 |
| DNM Accounting Services Limited | Professional & scientific | 2023 |
| DNY Transport Ltd | Transport & logistics | 2022 |
| Dochase Digital Limited | Professional & scientific | 2022 |
| Doctor KP Limited | Health & social care | 2021 |
| Doctrina Training Company Limited | Education | 2022 |
| Document Destruction Limited | Water & waste | 2016 |
| Dodai Property Lifestyle Limited | Real estate | 2025 |
| Dodkins Property Group Limited | Real estate | 2021 |
| Dods Installations Limited | Construction | 2012 |
| Dods Property Services Ltd | Financial services | 2025 |
| DOE Interiors Ltd | Construction | 2018 |
| Dogs Play Centre Limited | Other services | 2021 |
| Doina Accounting Ltd | Professional & scientific | 2017 |
| Dollardigital Limited | Extraterritorial | 2013 |
| Dollex Limited | Real estate | 2025 |
| Dolly and Bear Ltd | Education | 2017 |
| Domain Properties Limited | Real estate | 2010 |
| Domain Yorkshire 1 Limited | Construction | 2023 |
| Domestic Technology Services Ltd | Information & communication | 2025 |
| Dominion Care Homes Ltd | Real estate | 2023 |
| Dominium Search Ltd | Administrative & support | 2025 |
| Domshield Lettings Ltd | Real estate | 2025 |
| DON. W Electrical Limited | Construction | 2019 |
| Donovan Kendall Limited | Wholesale & retail | 1960 |
| Dori Accounting Limited | Professional & scientific | 2018 |
| Dormer Finance Limited | Professional & scientific | 2005 |
| Dormy Holdings Limited | Real estate | 2022 |
| Dorry-K Ltd | Health & social care | 2022 |
| Doru&Sprint Transport Ltd | Transport & logistics | 2025 |
| Dory Accounting Ltd | Professional & scientific | 2017 |
| Doryoku RYU Karate Jutsu Limited | Arts & recreation | 2009 |
| Dosev Limited | Administrative & support | 2011 |
| Double F Limited | Construction | 2023 |
| Double Happiness Chinese Takeaway Ltd | Hospitality | 2023 |
| Double J Limited | Hospitality | 2023 |
| Doublee Therapy Ltd | Health & social care | 2026 |
| Douglas & Golding Investments Limited | Real estate | 2018 |
| Dove Trimworks Limited | Wholesale & retail | 2008 |
| Dovecircle Services Ltd | Other services | 2016 |
| Dovercourt Refurbishments Ltd | Real estate | 2018 |
| Down by the River Ltd | Hospitality | 2024 |
| Downing Dance Studios Ltd | Arts & recreation | 2022 |
| Doyletech (Essex) Ltd | Energy | 2018 |
| DP Trims Limited | Other services | 2021 |
| DPS Decorating Ltd | Construction | 2021 |
| Drain Jetters Direct Ltd | Construction | 2025 |
| Drake Decorating Limited | Construction | 2019 |
| Drakon Transport Ltd | Extraterritorial | 2022 |
| Dream Home Loft Conversions & Extensions Ltd | Administrative & support | 2017 |
| Dream House Developers Limited | Real estate | 2020 |
| Dreamland Destinations Ltd | Administrative & support | 2025 |
| Dreamrandom Limited | Professional & scientific | 2015 |
| Dreamview Holding Ltd | Real estate | 2023 |
| Dreamway Ltd | Transport & logistics | 2021 |
| Dreamworks Building Services Ltd | Construction | 2012 |
| Drew Maintenance Ltd | Water & waste | 2007 |
| DRF Financial Services Limited | Professional & scientific | 2008 |
| Drillmorr Limited | Information & communication | 2022 |
| Driscoll Building Services Limited | Construction | 2005 |
| Driscolls Ll&R Limited | Construction | 2017 |
| Drissu Studio Ltd | Information & communication | 2025 |
| Drive Thru Motors Limited | Wholesale & retail | 2025 |
| Drive-Ai Solutions Limited | Information & communication | 2026 |
| Driven to Perfection Limited | Transport & logistics | 2011 |
| Driven Worldwide Limited | Transport & logistics | 2000 |
| Driver Media Limited | Other services | 2013 |
| Driver Owner and Partners Ltd | Transport & logistics | 2017 |
| Driverforce UK Ltd | Administrative & support | 1999 |
| Drivesavers UK Limited | Information & communication | 2024 |
| Drix Developments Ltd | Real estate | 2026 |
| DRM Foods Corp Ltd | Wholesale & retail | 2026 |
| Drndesign Ltd | Construction | 2023 |
| DRT Cleaning Services Ltd | Administrative & support | 2026 |
| Drvc UK Limited | Transport & logistics | 2015 |
| DS Burnett Limited | Wholesale & retail | 2020 |
| DS Coding Ltd | Education | 2025 |
| DS Worldwide Ltd | Manufacturing | 2021 |
| Ds'Cakes Ltd | Manufacturing | 2022 |
| DSA Interiors Ltd | Construction | 2019 |
| Dsaa Ltd | Construction | 2019 |
| Dsaa Properties Ltd | Real estate | 2024 |
| DSK Project Management Limited | Professional & scientific | 2011 |
| DSP Asset Services Limited | Construction | 2026 |
| DSP Fire Solutions Limited | Professional & scientific | 2025 |
| DSP Nationwide Group Ltd | Financial services | 2025 |