| Dioan Taxis Ltd | Transport & logistics | 2023 |
| Diplomatic Services Ltd | Wholesale & retail | 2018 |
| Direct Access Property Ltd | Construction | 2025 |
| Direct Autoworx Ltd | Wholesale & retail | 2025 |
| Direct Contact Services Limited | Administrative & support | 2020 |
| Direct Electrical Ltd | Construction | 2008 |
| Direct Enterprise Services Limited | Professional & scientific | 2016 |
| Direct Mark UK Ltd | Wholesale & retail | 2025 |
| Direct Peak Ltd | Professional & scientific | 2017 |
| Direct Solar Limited | Construction | 2025 |
| Directdrive Cars Limited | Wholesale & retail | 2025 |
| Directhire Ltd | Administrative & support | 2025 |
| Directly Consultancy Services Ltd | Professional & scientific | 2015 |
| Dirty Clean Expert Ltd | Transport & logistics | 2026 |
| Dirty Clean NOW Ltd | Administrative & support | 2023 |
| Dirtyclean Ltd | Administrative & support | 2026 |
| Discount Corner Ltd | Wholesale & retail | 2026 |
| Discount Drive Ltd | Wholesale & retail | 2024 |
| Discover-It Ltd | Information & communication | 2023 |
| Discovering Magazines Limited | Information & communication | 2013 |
| Dishforth Residents Company Limited | Households | 2002 |
| Dispargo Ltd | Wholesale & retail | 2025 |
| Display Energy Solutions Limited | Professional & scientific | 2008 |
| Disrupted Cloud Ltd | Administrative & support | 2017 |
| Disruptive Entrepreneurial Ventures 2 Ltd | Real estate | 2022 |
| Disruptive Entrepreneurial Ventures Ltd | Professional & scientific | 2019 |
| District 66 Ltd | Real estate | 2023 |
| District Staffing Limited | Administrative & support | 2025 |
| Ditchin Archaeology Ltd | Professional & scientific | 2025 |
| Ditta Property Investments Ltd | Real estate | 2021 |
| Diva Select Limited | Wholesale & retail | 2026 |
| Divan Holdings Ltd | Financial services | 2024 |
| Divco Ltd | Financial services | 2022 |
| Divergent Networks Limited | Information & communication | 2021 |
| Diverse Claims Limited | Professional & scientific | 2026 |
| Diversity Wellbeing Service Ltd | Health & social care | 2022 |
| Divine Eagles Management Services Limited | Professional & scientific | 2015 |
| Divine Motor Group Ltd | Wholesale & retail | 2026 |
| Divine Social Care Ltd | Health & social care | 2021 |
| Divine Worship Experience CIC | Other services | 2024 |
| Divino Catering Ltd | Hospitality | 2016 |
| Divinum Group Ltd | Wholesale & retail | 2025 |
| Divya Lahoria Ltd | Wholesale & retail | 2013 |
| Dizzy Ears Limited | Health & social care | 2022 |
| DJ Consultancy Services Ltd | Information & communication | 2025 |
| DJ Electrotech Ltd | Construction | 2023 |
| DJ Transport 1980 Ltd | Transport & logistics | 2018 |
| Djap Ltd | Health & social care | 2016 |
| DJB & SON Logistics Ltd | Transport & logistics | 2026 |
| DJB Landscaping Ltd | Administrative & support | 2023 |
| DJG Windows & Doors Ltd | Construction | 2020 |
| Djhqs Consultancy Limited | Professional & scientific | 2019 |
| DJK Contracting Ltd | Other services | 2025 |
| Djkw Limited | Wholesale & retail | 2015 |
| DJL (UK) Limited | Construction | 2014 |
| DJR Flooring Services Ltd | Construction | 2024 |
| DJS Building and Roofing Services Ltd | Construction | 2024 |
| DJS Electrical Services Ltd | Construction | 2022 |
| DJS Metal & Lead Roofing Ltd | Professional & scientific | 2021 |
| Djsm Properties Limited | Real estate | 2025 |
| DK Salvage Limited | Wholesale & retail | 1999 |
| DK Smartex Ltd | Households | 2025 |
| DK Water Services (UK) Ltd | Construction | 2025 |
| DKC Cars Ltd | Wholesale & retail | 2025 |
| Dkdelivery Ltd | Transport & logistics | 2024 |
| DKE Air Conditioning & Refrigeration Ltd | Energy | 2022 |
| DKR Housing Limited | Real estate | 2018 |
| DKW Property Services Limited | Professional & scientific | 2020 |
| DL Plumbing Heating Drainage Ltd | Construction | 2023 |
| DL Projects Limited | Professional & scientific | 2017 |
| DLE Technology Ltd | Financial services | 2018 |
| DLF Control Systems Limited | Manufacturing | 2007 |
| DLJ Network Limited | Information & communication | 2014 |
| DLM Electric Ltd | Extraterritorial | 2015 |
| Dlmdd Limited | Professional & scientific | 2018 |
| Dlmdd Scent Limited | Manufacturing | 2024 |
| Dlmdd Ventures Limited | Financial services | 2024 |
| DM & CD Colman Property Management Ltd | Real estate | 2019 |
| DM Automotive Ltd | Wholesale & retail | 2019 |
| DM Corporate Hospitality Ltd | Hospitality | 2026 |
| DM Investment Holdings Limited | Financial services | 2022 |
| DM Technology Services Ltd | Information & communication | 2019 |
| Dm's Beauty Ltd | Other services | 2017 |
| Dmac Management Consultants Limited | Professional & scientific | 2003 |
| DMB Property Investment Limited | Real estate | 2020 |
| DMG Electrical and Compliance Ltd | Construction | 2018 |
| Dmgf Trading Ltd | Wholesale & retail | 2026 |
| DMH Accountants Limited | Professional & scientific | 2024 |
| DML Partnership Ltd | Real estate | 2009 |
| DML Property Limited | Extraterritorial | 2005 |
| DML Shopfitters Limited | Extraterritorial | 2004 |
| DMM Autos Ltd | Financial services | 2026 |
| DMS Cars Ltd | Wholesale & retail | 2024 |
| DMS Global Ltd | Transport & logistics | 2024 |
| DMS Mechanical Solutions Ltd | Water & waste | 2022 |
| DMS Media Limited | Information & communication | 2012 |
| DMT Development Group Limited | Real estate | 2017 |
| DNA Construction Holdings Ltd | Construction | 2019 |
| DNA Number Plates Limited | Manufacturing | 2025 |
| DNA Scaffolding Limited | Construction | 2007 |