| Deep Marine Salvage UK Limited | Professional & scientific | 2012 |
| Deep Strike Ventures Ltd | Professional & scientific | 2025 |
| DEEP10 Limited | Construction | 2014 |
| Deepak Shetty Enterprises Ltd | Health & social care | 2012 |
| Deepanalytix Ltd | Information & communication | 2025 |
| Deepblue Group Co., Ltd. | Wholesale & retail | 2024 |
| Deepdale Technology Ltd | Information & communication | 2023 |
| Deepfresh Services UK Limited | Administrative & support | 2025 |
| Deeplinx Limited | Information & communication | 2024 |
| Deepmed IO Limited | Information & communication | 2017 |
| Deeppath Ltd | Information & communication | 2022 |
| Deeprock Ltd | Wholesale & retail | 2025 |
| Deepwave Technologies Ltd | Information & communication | 2025 |
| Deer & Hunter Studios Limited | Other services | 2018 |
| Deer Network Systems Limited | Information & communication | 2023 |
| Deerapido Limited | Construction | 2013 |
| Deering TM Limited | Construction | 2017 |
| Deerock Ltd | Real estate | 2023 |
| Deeside Assets Ltd | Real estate | 2024 |
| Deeside Estates Limited | Extraterritorial | 2000 |
| Deeside Trading Services Limited | Information & communication | 1991 |
| Deetya Limited | Real estate | 2025 |
| DEF Funding Limited | Real estate | 2025 |
| Defa Property Ltd | Real estate | 2021 |
| Defaf AL Ebdaa Ltd | Wholesale & retail | 2026 |
| Defaqto Leisure Ltd | Wholesale & retail | 2009 |
| Defden Property Ltd | Real estate | 2025 |
| Defeara Fone Ltd | Wholesale & retail | 2019 |
| Defence Prime Solutions Ltd | Administrative & support | 2025 |
| Defend-London Limited | Wholesale & retail | 2015 |
| Defendcore FM Ltd | Administrative & support | 2025 |
| Defendo Ltd | Real estate | 2014 |
| Defense Force Security Ltd | Administrative & support | 2025 |
| Deffner Valve Co., Ltd | Manufacturing | 2021 |
| Deffys Limited | Hospitality | 2023 |
| Define Architects Limited | Professional & scientific | 2020 |
| Define Architects Manchester LLP | | 2018 |
| Define Coaching Ltd | Administrative & support | 2021 |
| Define Financial Planning Limited | Financial services | 2008 |
| Define Talent Ltd | Administrative & support | 2021 |
| Defined Returns Limited | Professional & scientific | 2003 |
| Definite Difference Ltd | Other services | 2012 |
| Definition Consulting Limited | Professional & scientific | 2011 |
| Definity T Ltd | Wholesale & retail | 2026 |
| Defunked Entertainment Limited | Arts & recreation | 2022 |
| Defunked Services Limited | Information & communication | 2023 |
| Defy Studios Ltd | Information & communication | 2021 |
| Deganwy Lodge Management Limited | Households | 2025 |
| Degenesis Foods and Confectionaries Limited | Manufacturing | 2025 |
| Degenesis Security Solution Limited | Administrative & support | 2026 |
| Degenin Social Ltd | Professional & scientific | 2025 |
| Degesh Healthcare Services Ltd | Public administration | 2025 |
| Deglo Care Ltd | Administrative & support | 2023 |
| Degrees Minutes Seconds Solutions Limited | Wholesale & retail | 2025 |
| Dehdar Ltd | Real estate | 2025 |
| Dehghani Management Limited | Real estate | 2021 |
| Dehmel Dienstleistungen Ltd | Administrative & support | 2019 |
| Dehui Global Solutions Limited | Wholesale & retail | 2025 |
| Deiago Ltd | Arts & recreation | 2018 |
| Deidei Limited | Wholesale & retail | 2022 |
| Deiss International Limited | Wholesale & retail | 2015 |
| Deity Franchise Ltd | Real estate | 2023 |
| Deiveega Kalasam Ltd | Wholesale & retail | 2024 |
| Deja Technical Services Ltd | Professional & scientific | 2008 |
| Dejavu Holdings Ltd | Other services | 2019 |
| Dejavu Properties Limited | Real estate | 2020 |
| Dejen Group Ltd | Real estate | 2024 |
| Dejmood Services Group Ltd | Administrative & support | 2019 |
| Dekany's Limited | Wholesale & retail | 2022 |
| Dekbed UK Limited | Manufacturing | 2012 |
| Dekiln Ltd. | Professional & scientific | 2021 |
| Dekka Construction Limited | Construction | 2017 |
| Dekknanc Limited | Health & social care | 2015 |
| Dekoor Lighting Co., Ltd | Manufacturing | 2024 |
| Dekru Ltd | Extraterritorial | 2023 |
| Dekto Ltd | Construction | 2024 |
| Dekuza Limited | Wholesale & retail | 2026 |
| DEL Al-Takamoul Ltd | Wholesale & retail | 2025 |
| DEL Pozzo Group Ltd | Real estate | 2015 |
| DEL Vigna Accountancy Solutions Ltd | Professional & scientific | 2020 |
| DEL Vigna Dobson Limited | Professional & scientific | 2012 |
| Dela Allcare Ltd | Wholesale & retail | 2025 |
| Delahays Range Management Company Limited | Real estate | 2006 |
| Delamere Place (Northern Moor) Management Company Limited | Households | 2004 |
| Delamere Print & Graphics Limited | Manufacturing | 2003 |
| Delamere Property Services Ltd | Construction | 2008 |
| Delaneys DO Dance Ltd. | Information & communication | 2024 |
| Delaphante Solutions Ltd | Information & communication | 2019 |
| Delaunays Chippy Ltd | Hospitality | 2020 |
| Delaval Film Ltd | Information & communication | 2016 |
| Delaware Estates Limited | Real estate | 2018 |
| Delbob Developments LLP | | 2003 |
| Delco Logistics Limited | Transport & logistics | 2016 |
| Delectus Group Ltd | Real estate | 2023 |
| Deleine Limited | Health & social care | 1982 |
| Delheim Capital PTE Ltd | Administrative & support | 2023 |
| Delhi Sweet Centre Limited | Hospitality | 1989 |
| Delhi 2 Go Ltd | Hospitality | 2024 |
| Delhi Blackpool Ltd | Hospitality | 2024 |
| Delhi Chaat House Ltd | Hospitality | 2025 |