| Dominion Faith Chapel International | Other services | 2019 |
| Dominus Services Limited | Professional & scientific | 2006 |
| Donchev Ltd | Construction | 2017 |
| Doormac (UK) Limited | Wholesale & retail | 2006 |
| Doorsec Dubai Limited | Administrative & support | 2023 |
| Dorcas & Freres Ltd | Professional & scientific | 2024 |
| Dorcas Locums Ltd | Wholesale & retail | 2022 |
| Dorcas Trades Limited | Financial services | 2025 |
| Dorobucci Ltd | Financial services | 2026 |
| Dorset Street Psychotherapy Ltd | Health & social care | 2024 |
| DOT and Dash Ltd | Transport & logistics | 2010 |
| DOT NET Explorer Limited | Wholesale & retail | 2008 |
| Dotnet Build Ltd | Wholesale & retail | 2023 |
| Dotphil Services Ltd | Health & social care | 2014 |
| Double Diamons Limited | Administrative & support | 2009 |
| Double Happiness Wholesale Ltd. | Professional & scientific | 1990 |
| Double Numbers Limited | Wholesale & retail | 2024 |
| DOV Contractors Ltd | Construction | 2019 |
| Dovadova Limited | Transport & logistics | 2020 |
| Dover Street Partners Ltd | Financial services | 2025 |
| Dovey Environmental Services Ltd | Professional & scientific | 2025 |
| Down to Earth Global Ltd | Information & communication | 2025 |
| Doxa.Nd Ltd | Wholesale & retail | 2025 |
| Doyinade Ltd | Health & social care | 2022 |
| Dpcc A1 Ltd | Construction | 2023 |
| Dpnn Limited | Health & social care | 2011 |
| DPV Construction Ltd | Construction | 2016 |
| DPV Ltd | Information & communication | 2025 |
| DR Vapes LAB Ltd | Wholesale & retail | 2022 |
| DRACULASCAFFOLDING12 Ltd | Construction | 2022 |
| Draggon Fire Ltd | Construction | 2023 |
| Drago & Vlady Transport Ltd | Transport & logistics | 2017 |
| Dragonsecurityuk Limited | Administrative & support | 2020 |
| Dramatic Designs Ltd | Professional & scientific | 2024 |
| Dramatic Graphics Limited | Professional & scientific | 2025 |
| Drawing and Building Limited | Construction | 2025 |
| DRB Design and Build Ltd | Construction | 2024 |
| Dream Accounts Ltd | Professional & scientific | 2015 |
| Dream Group Properties Ltd | Real estate | 2024 |
| Dream Shutters Ltd | Construction | 2024 |
| Dream Utility Hub Ltd | Construction | 2024 |
| Dreamer's Enterprises Ltd | Information & communication | 2024 |
| Dreamland Services UK Limited | Professional & scientific | 2019 |
| Dreamroute Education Ltd | Education | 2026 |
| Dreams Build Ltd | Construction | 2015 |
| Dreams Decor Ltd | Construction | 2022 |
| Dreams Delight Ltd | Real estate | 2019 |
| Dreams International Recruitment Ltd | Administrative & support | 2018 |
| Dreamscape IT Ltd | Wholesale & retail | 2024 |
| Dreg Limited | Real estate | 2025 |
| DRG Flooring Ltd | Construction | 2018 |
| Dripndrowntown Ltd | Wholesale & retail | 2020 |
| Drive Cars Ltd | Wholesale & retail | 2015 |
| Driveahead Limited | Hospitality | 2024 |
| Driveo Exclusive Limited | Other services | 2023 |
| Driver Express Ltd | Transport & logistics | 2016 |
| DRIVER2DELIVERY Ltd | Transport & logistics | 2025 |
| Drivewin Ltd | Construction | 2024 |
| Drivewinjad Ltd | Construction | 2024 |
| Drivex Recruitment Limited | Administrative & support | 2025 |
| Drop White Ltd | Wholesale & retail | 2018 |
| DRT London Limited | Wholesale & retail | 2024 |
| DRZ Autos Ltd | Wholesale & retail | 2026 |
| DS Bridge Ltd | Real estate | 2025 |
| DS Builders London Ltd | Construction | 2020 |
| DS Transport Ltd | Professional & scientific | 2026 |
| DSG Consultant Limited | Health & social care | 2016 |
| DSG Contractors Ltd | Construction | 2014 |
| Dsh(Uk) Ltd | Real estate | 2020 |
| DSI Billing Services Limited | Other services | 1999 |
| Dssg Limited | Administrative & support | 2026 |
| DSY Limited | Wholesale & retail | 2021 |
| DT O'Connor Ltd | Information & communication | 2013 |
| DTE Community Creators CIC | Education | 2025 |
| DTL Install Ltd | Construction | 2025 |
| Dtnt Services Limited | Transport & logistics | 2015 |
| Du&Mi Tiling Ltd | Construction | 2018 |
| DUA Associates Limited | Professional & scientific | 2014 |
| DUA Fresh Meat and Grocery Ltd | Wholesale & retail | 2018 |
| DUA International Traders Ltd | Wholesale & retail | 2025 |
| Duaenterprisesuk Ltd | Wholesale & retail | 2026 |
| Dubai Express Pizza Limited | Hospitality | 2023 |
| Dubai Shisha Ltd | Wholesale & retail | 2024 |
| Duca Transport Ltd | Transport & logistics | 2018 |
| Duetec Ltd | Health & social care | 2015 |
| Duku Ltd | Other services | 2026 |
| Dulcie's Helping Hand Childminder Ltd | Health & social care | 2020 |
| Dumlu Limited | Hospitality | 2012 |
| Dunasteia Ltd | Real estate | 2023 |
| Dunton Ltd | Transport & logistics | 2021 |
| Duobright Cleaning Ltd | Construction | 2025 |
| Dursha Consultancy Services Ltd | Information & communication | 2024 |
| Dust-It Cleaning Services Limited | Administrative & support | 2023 |
| Dustedit Ltd | Administrative & support | 2026 |
| Dutchpott Limited | Hospitality | 2022 |
| Duygu (UK) Ltd | Hospitality | 2011 |
| DVB Group Limited | Real estate | 2024 |
| DVS Motors Ltd | Wholesale & retail | 2014 |
| DWK Capital Ltd | Manufacturing | 2013 |
| DY Hub Properties Limited | Real estate | 2025 |