| Djenym Productions Ltd | Information & communication | 2021 |
| DJH Bexley LLP | | 2010 |
| DJH Bexley Payroll Bureau Ltd | Professional & scientific | 2021 |
| DJM Letting Services Limited | Real estate | 2022 |
| Dkw-Solutions Limited | Construction | 2026 |
| DL Nightlife Ltd | Hospitality | 2025 |
| DL4 Solutions Ltd | Administrative & support | 2017 |
| DLD Joinery Limited | Manufacturing | 1997 |
| Dlines Ltd | Construction | 2013 |
| DMA Assets (UK) Ltd | Real estate | 2022 |
| DMD Work Surfaces Limited | Construction | 2014 |
| DML Scaffolding Services Ltd | Construction | 2019 |
| DN Cable Installations Limited | Energy | 2019 |
| DN Smart Accounting Ltd | Professional & scientific | 2024 |
| DN9 Property Limited | Real estate | 2018 |
| DNH Commercial Services Limited | Professional & scientific | 2024 |
| DNH Ventures Limited | Financial services | 2025 |
| DNL Holdings Limited | Real estate | 2024 |
| DO 'Buy to LET' With ME Ltd | Real estate | 2025 |
| DO I.T. With ME Limited | Information & communication | 2007 |
| Dobrev IT Ltd. | Information & communication | 2018 |
| Docklands Property Consultancy (UK) Ltd | Administrative & support | 2009 |
| Doctor Rejuvenate Limited | Health & social care | 2021 |
| Dog and Groom Limited | Other services | 2018 |
| Domain Data Solutions Limited | Information & communication | 2014 |
| Domi B Transport Ltd | Transport & logistics | 2020 |
| Domindoil Limited | Professional & scientific | 1962 |
| Donna Ruane Limited | Administrative & support | 2012 |
| Door 77 Films Limited | Information & communication | 2021 |
| Door 77 Productions Limited | Information & communication | 2021 |
| Doreworks Limited | Construction | 2023 |
| Dorminton Limited | Construction | 2020 |
| Doshex Limited | Information & communication | 2020 |
| Dotted Leopard Ltd | Wholesale & retail | 2021 |
| Double O Electrical Ltd | Construction | 2021 |
| Doug Chapman Piano Services Limited | Education | 2014 |
| Doug Fuller Consultancy Ltd | Professional & scientific | 2012 |
| Dovorian Commercial Solutions Limited | Professional & scientific | 2023 |
| Dovorian Properties Limited | Real estate | 2023 |
| DOW and Jones Ltd | Administrative & support | 2015 |
| Downhill Services Ltd | Transport & logistics | 2023 |
| Downing Photographic Ltd | Professional & scientific | 2020 |
| Downtown Property Ltd | Real estate | 2022 |
| Doxa Properties Limited | Real estate | 2021 |
| DP Flooring Ltd | Administrative & support | 2022 |
| DP Lift Consultant Limited | Manufacturing | 2018 |
| DP Paige Shoe Consultancy Limited | Administrative & support | 2017 |
| DP Plasis Ltd | Construction | 2009 |
| DP Resourcing Limited | Transport & logistics | 2022 |
| DPM Commissioning Ltd | Professional & scientific | 2018 |
| DR Goodwin Limited | Administrative & support | 2020 |
| DR Pourghobad Ltd | Health & social care | 2024 |
| DR Sophie Sterling Ltd | Health & social care | 2022 |
| Draft Architecture Ltd | Professional & scientific | 2015 |
| Dragline (Holdings) Limited | Administrative & support | 2011 |
| Dragon Maiden Limited | Wholesale & retail | 2025 |
| Dravy Ltd | Real estate | 2022 |
| Dream Nails (DA) Limited | Other services | 2023 |
| Dribble Days Limited | Administrative & support | 2020 |
| Drift Green Limited | Professional & scientific | 1987 |
| Drinalondon Ltd | Other services | 2026 |
| Drink Aquatonic Ltd | Manufacturing | 2021 |
| Drish Commercial Holdings Ltd | Hospitality | 2026 |
| Drish Leisure Ltd | Hospitality | 2026 |
| Drish Properties Ltd | Real estate | 2023 |
| Drive & Deliver Construction Limited | Administrative & support | 2017 |
| Drunel Limited | Education | 2004 |
| DSC & Partners Limited | Professional & scientific | 2024 |
| Dsconstruct Limited | Construction | 2018 |
| DSG Construct Ltd | Construction | 2017 |
| DSN Haulage Ltd | Transport & logistics | 2022 |
| DSR Builders Limited | Construction | 2025 |
| DSS Connect Limited | Information & communication | 2021 |
| DTF Installation Ltd | Construction | 2024 |
| DTK Building Specialists Limited | Construction | 2019 |
| Dtvs Services Limited | Administrative & support | 2018 |
| DTW Building Services Ltd | Construction | 2025 |
| DTW Management Solutions Limited | Construction | 2023 |
| DUA Group Association CIC | Education | 2023 |
| Dubai Dental Ltd | Health & social care | 2013 |
| Dubai Estates Ltd | Real estate | 2022 |
| Duggal Property Developments Limited | Real estate | 2016 |
| Duke & Duke Holdings Ltd | Real estate | 2017 |
| Dulwich Blue Wash Limited | Administrative & support | 2018 |
| Dulwich Goods Limited | Administrative & support | 2018 |
| Dunelm Building Services Limited | Construction | 2009 |
| Dunstans 7 Limited | Real estate | 2023 |
| Dunstans Road Limited | Real estate | 2023 |
| Duris Ltd | Wholesale & retail | 2010 |
| Dutts Electrical Limited | Construction | 2020 |
| Duxford Holdings Limited | Construction | 2025 |
| Dvtech Solutions Ltd. | Information & communication | 2014 |
| Dwell Smart Limited | Real estate | 2026 |
| Dwyer Consulting Limited | Administrative & support | 1996 |
| DX Events Management Limited | Professional & scientific | 2016 |
| Dyer & Co Services Limited | Professional & scientific | 2004 |
| Dylan Garrett Limited | Professional & scientific | 2018 |
| Dynamic Coaching London Ltd | Administrative & support | 2022 |
| Dynamic Coaching South East England CIC | Arts & recreation | 2017 |
| Dynamic Group London Ltd | Arts & recreation | 2010 |