| Dogs Dynasty K9 Security Consultancy Services Ltd | Administrative & support | 2026 |
| Dollface Boutique Ltd | Wholesale & retail | 2020 |
| Dolphin Logistics (London) Ltd | Transport & logistics | 1998 |
| Dome Installations and Developments Limited | Real estate | 2019 |
| Dome Installations Limited | Construction | 2014 |
| Dominion City Kent | Education | 2023 |
| DON Cleaning Limited | Administrative & support | 2025 |
| Donal Lucey Lawlor Limited | Extraterritorial | 2008 |
| Donforni Ltd | Construction | 2006 |
| Donkor & Associates Ltd | Professional & scientific | 2015 |
| Donna’S UK Commercial Trading Ltd | Hospitality | 2020 |
| Doppul Ltd | Information & communication | 2026 |
| Dora Gold Water Ltd | Wholesale & retail | 2018 |
| Dorathy Care and Support Solutions Services Ltd | Administrative & support | 2025 |
| Dormole Limited | Professional & scientific | 1974 |
| Dorothy Tande Coaching Ltd | Administrative & support | 2016 |
| DOS Autos Diagnostics & Tuning Ltd | Administrative & support | 2026 |
| DOS Autos Ltd | Wholesale & retail | 2025 |
| Dosa House Limited | Hospitality | 2021 |
| Dosen Limited | Professional & scientific | 2016 |
| Dosh Solutions Limited | Real estate | 2025 |
| Double a Financial Services Ltd | Financial services | 2013 |
| Double EN3 Limited | Professional & scientific | 2024 |
| Double Zeros Solutions Limited | Information & communication | 2019 |
| Dough & Batter Limited | Manufacturing | 2025 |
| Douglas Dale Consulting Limited | Information & communication | 2015 |
| Douglas Metal Finishing Limited | Manufacturing | 2002 |
| Dovrepairs Ltd | Construction | 2021 |
| Downmoor Limited | Professional & scientific | 2024 |
| DP Connect Limited | Administrative & support | 1995 |
| DP Dumfries Ltd | Hospitality | 2014 |
| DP Recruitment Ltd | Administrative & support | 2023 |
| DPC Agencies Limited | Wholesale & retail | 2002 |
| DPD Trans Ltd | Transport & logistics | 2025 |
| DPG Plumbing GAS Ltd | Construction | 2021 |
| DPH Energy Ltd | Professional & scientific | 2026 |
| DPJ Trans Ltd | Transport & logistics | 2019 |
| DPM Facilities Limited | Other services | 2001 |
| DPM Facts Consultancy Service Limited | Other services | 2018 |
| DPM Facts Limited | Other services | 2020 |
| DPP Illuminate Solutions Limited | Construction | 2015 |
| Dprs (Barnsley) Ltd | Hospitality | 2021 |
| Dprs (Beverley) Ltd | Hospitality | 2021 |
| Dprs (Cockermouth) Ltd | Hospitality | 2020 |
| Dprs (Holderness) Ltd | Hospitality | 2021 |
| Dprs (Kingswood) Ltd | Hospitality | 2020 |
| Dprs (Todmorden) Ltd | Hospitality | 2021 |
| Dprs (Windermere) Ltd | Hospitality | 2020 |
| Dprs East Riding Limited | Hospitality | 2012 |
| Dprs Lakes Limited | Hospitality | 2024 |
| Dprs Liverpool Limited | Hospitality | 2017 |
| Dprs Manchester Limited | Hospitality | 2026 |
| Dprs North Limited | Hospitality | 2019 |
| Dprs Scots Limited | Hospitality | 2024 |
| DR Ace Healthcare Ltd | Health & social care | 2015 |
| DR Cientanni Limited | Health & social care | 2022 |
| DR Congo Education FDN CIC | Education | 2024 |
| DR Emilie Abraham Ltd | Other services | 2024 |
| DR Jugon Private Ltd | Health & social care | 2022 |
| DR Omotola Adejumo Ltd | Health & social care | 2025 |
| DR Steve Phillips Frics Ltd | Professional & scientific | 2014 |
| DR. Maria Aesthetics Ltd | Other services | 2021 |
| DR. Robert Abraham Limited | Other services | 2015 |
| Draco Advisors Ltd | Professional & scientific | 2017 |
| Drad International Ltd | Wholesale & retail | 2023 |
| Dragan Development Ltd | Real estate | 2015 |
| Dragon's Holdings Ltd | Hospitality | 2022 |
| Drainage Maintenance Limited | Construction | 2009 |
| Drainage That Works Ltd | Water & waste | 2020 |
| Dravya Limited | Health & social care | 2016 |
| DRC Construction Consultants Limited | Construction | 2019 |
| Drcx Ltd | Transport & logistics | 2025 |
| DRE4SUCCESS Ltd | Information & communication | 2022 |
| Dream Tourism Limited | Administrative & support | 2023 |
| Dreamsland Ltd | Construction | 2004 |
| Dreamsville Home Ltd | Real estate | 2019 |
| Drew George Ltd | Construction | 2015 |
| Drgroup Logistics Ltd | Transport & logistics | 2024 |
| Drguide Ltd | Information & communication | 2024 |
| Drini Construction Ltd | Construction | 2023 |
| Drink 2 L Ltd | Wholesale & retail | 2021 |
| Driscoll Motors Ltd | Wholesale & retail | 2026 |
| Drive B2B Ltd | Professional & scientific | 2023 |
| Drive Smart Dealers Ltd | Wholesale & retail | 2025 |
| Drkaka Limited | Manufacturing | 2025 |
| DRN Holdings Limited | Professional & scientific | 2018 |
| Dropship Direct Limited | Wholesale & retail | 2025 |
| Drummond Associates Ltd | Other services | 2025 |
| Drunk Duck Apparel Limited | Manufacturing | 2015 |
| Drury & Cole Ltd | Real estate | 2017 |
| Drytech Construction Ltd | Construction | 2011 |
| Drzr Clinical Psychology Services Ltd | Health & social care | 2023 |
| DS Coffee (Allenton) Ltd | Wholesale & retail | 2020 |
| DS Coffee (Blaby) Ltd | Wholesale & retail | 2020 |
| DS Coffee (Oakham) Limited | Wholesale & retail | 2022 |
| DS Coffee (Wellingborough) Ltd | Wholesale & retail | 2020 |
| DS Coffee Limited | Wholesale & retail | 2015 |
| DS Data Consultancy Limited | Information & communication | 2024 |
| DS Lifts Ltd | Administrative & support | 2016 |
| DS Roofing Contractors Ltd | Construction | 2024 |