| Digitain UK Limited | Administrative & support | 2023 |
| Digital Energy Solutions Ltd | Information & communication | 2025 |
| Digital Energy Ventures Ltd | Financial services | 2025 |
| Digital Grind Studio Ltd | Information & communication | 2025 |
| Digital Missives Limited | Information & communication | 2005 |
| Digital Print Factory Limited | Administrative & support | 1995 |
| Digital Vista Solutions Ltd | Information & communication | 2024 |
| Dilwara and Sons Limited | Real estate | 2021 |
| Dimar Aluminium Ltd | Extraterritorial | 2011 |
| Dimar Ltd | Extraterritorial | 2011 |
| Dinamak Ltd | Professional & scientific | 2013 |
| DIP Advisor Ltd | Arts & recreation | 2018 |
| Direct Property Limited | Real estate | 2009 |
| Dirty Talk Publishing Ltd | Information & communication | 2025 |
| Discountmall Ltd | Wholesale & retail | 2025 |
| Disrupt Limited | Administrative & support | 2008 |
| Disruptive Hub Ltd | Information & communication | 2015 |
| Distinct Productions Limited | Information & communication | 2016 |
| Distinctive Cards & Wrap Services Ltd | Wholesale & retail | 1997 |
| Divestable Limited | Administrative & support | 2022 |
| Diwai Limited | Households | 2022 |
| DJE Projects Ltd | Administrative & support | 2023 |
| DJK Electrical Contractors Limited | Construction | 2006 |
| DJL Post Production Services Ltd | Information & communication | 2012 |
| DJM QS Consult Ltd | Professional & scientific | 2023 |
| Djslsoft Group Limited | Information & communication | 2022 |
| DK Actuarial Services Limited | Professional & scientific | 2024 |
| DKD Construction Limited | Construction | 2019 |
| DKR Construction Services Limited | Professional & scientific | 2018 |
| DL Spa Services Limited | Health & social care | 2025 |
| Dllm Ltd | Information & communication | 2026 |
| DM Electrotechnical Limited | Administrative & support | 2015 |
| DMP Accountancy Ltd | Professional & scientific | 2017 |
| Dmqs Services Ltd | Professional & scientific | 2022 |
| DMR Creative Ltd | Arts & recreation | 2025 |
| Dmrt Estates Ltd | Real estate | 2019 |
| DNG Plumbing Ltd | Construction | 2018 |
| Dnl.Green Limited | Construction | 2018 |
| DNS Services 247 Ltd | Administrative & support | 2019 |
| DO IT GET IT Ltd | Information & communication | 2020 |
| Dobpaws Ltd | Wholesale & retail | 2025 |
| Dobson Group Holdings Ltd | Other services | 2023 |
| Doctor Komil Limited | Health & social care | 2022 |
| Doctor Omar Limited | Health & social care | 2018 |
| Doctors Club Ltd. | Financial services | 2016 |
| Dodgy Deliveries Ltd | Transport & logistics | 2026 |
| Dog Pool Paradise Ltd | Other services | 2023 |
| Dolce Limited | Other services | 1990 |
| Dolphin Mobility Hoists Ltd | Wholesale & retail | 1999 |
| Dolphin Ventures Ltd | Households | 2024 |
| Doma Construction Limited | Construction | 2022 |
| Doman Materials Ltd | Wholesale & retail | 2022 |
| Dominique Roberts Interiors Limited | Professional & scientific | 2012 |
| Domino Bar Ltd | Wholesale & retail | 2018 |
| Domus U.K. Ltd | Administrative & support | 2014 |
| DON' Sweet Limited | Construction | 2018 |
| Don'T Tell MUM Limited | Hospitality | 2023 |
| Donnafields Residents Association Limited | Households | 1997 |
| Don’T BE Sh*T Ltd | Wholesale & retail | 2026 |
| Door Retainers Limited | Construction | 2005 |
| Doormove Ltd | Real estate | 2019 |
| Dorquip Group Ltd | Wholesale & retail | 2018 |
| Dorquip Limited | Wholesale & retail | 2020 |
| DOT Enterprise Group Ltd | Wholesale & retail | 2021 |
| Dotgomm Ltd | Other services | 2025 |
| Dotnetcorner Limited | Information & communication | 2007 |
| Double K Properties Ltd | Real estate | 2005 |
| Double R Racing Limited | Arts & recreation | 2004 |
| Doublejade UK Limited | Professional & scientific | 1990 |
| Doves Crocker Morgan Limited | Real estate | 2023 |
| Doves Life Limited | Other services | 2024 |
| Dowlis Global Limited | Wholesale & retail | 2018 |
| Dowlis Group Global Solutions Limited | Financial services | 2021 |
| Dowlis Inspired Branding Limited | Administrative & support | 1974 |
| Downe House Limited | Households | 1983 |
| Downside (Woking) Management Company Limited | Households | 2001 |
| DPC Consulting Limited | Real estate | 2021 |
| Dpffault Ltd | Wholesale & retail | 2025 |
| Dpsco Development Limited | Construction | 2020 |
| DR Gans Limited | Transport & logistics | 2008 |
| DR Macfarlane Associates Limited | Health & social care | 2016 |
| DR PF Brown Associates Ltd | Health & social care | 2020 |
| DR Sadiya Hussain Ltd | Health & social care | 2023 |
| DR Sharadah Essapen Limited | Health & social care | 2009 |
| DR Technology Consulting Ltd | Information & communication | 2024 |
| DR. Mayer Pet Health Limited | Professional & scientific | 2019 |
| DR. Neuroaesthetics Ltd | Health & social care | 2022 |
| DR. Sreedaran Psychiatry Ltd | Health & social care | 2022 |
| Dragon Heights Estates Limited | Financial services | 2021 |
| Dragon Inn Chinese Cuisine Limited | Hospitality | 2022 |
| Dramatize CIC | Health & social care | 2012 |
| Dream Design Lodge Limited | Professional & scientific | 1999 |
| Dream Station Productions Ltd | Arts & recreation | 2023 |
| Dream Style Limited | Manufacturing | 2016 |
| Dream-Wayz Travel Network Ltd | Professional & scientific | 2022 |
| Dreamcoat Designs Ltd | Construction | 2025 |
| Dreaming Fish Productions Limited | Information & communication | 2014 |
| Dreamport Software Limited | Information & communication | 2016 |
| Dreams Building Services Limited | Construction | 2024 |
| Dreamsoft Studios Ltd | Information & communication | 2026 |