| Darjeeling Spice Ltd | Hospitality | 2017 |
| Darkscape Consulting Limited | Professional & scientific | 2022 |
| Darland Properties Limited | Households | 2008 |
| Darrylandpennymeeking Limited | Health & social care | 2017 |
| Darya Supermarket Ltd | Wholesale & retail | 2026 |
| Data Centre I&E Limited | Information & communication | 2016 |
| Data Imps International Limited | Information & communication | 2020 |
| Daulston Road Ltd | Financial services | 2025 |
| Dave Field Carpentry Ltd | Construction | 2019 |
| David Investment Group Ltd | Information & communication | 2023 |
| David Oliver Consultancy Limited | Professional & scientific | 2009 |
| David Pople's Kiosks Ltd | Hospitality | 2025 |
| Davies & Davies Plumbing and Heating Ltd | Construction | 2018 |
| DAVKIM254 Studios Ltd | Information & communication | 2022 |
| Dayoirehavens Limited | Professional & scientific | 2024 |
| DB Construction Consultants Ltd | Professional & scientific | 2014 |
| DB Fire Ltd | Public administration | 2021 |
| Dbak Installations Ltd | Construction | 2026 |
| Dbrs & SON Ltd | Construction | 2019 |
| DC UK Services Limited | Information & communication | 2015 |
| DE Competitor Limited | Real estate | 2021 |
| DE Pads Limited | Real estate | 2025 |
| Dean Carter Electrical Limited | Construction | 1999 |
| Deborah Anne Garrod Limited | Extraterritorial | 2023 |
| Decarbonise Ltd | Professional & scientific | 2021 |
| Declan Kirk Media Ltd | Professional & scientific | 2024 |
| Deelad Limited | Real estate | 2013 |
| Deepgiller Limited | Construction | 2025 |
| Deerhobbes Ltd | Wholesale & retail | 2011 |
| Defender Security and Guarding Services Limited | Administrative & support | 2023 |
| Dehavilland Consultancy Services Ltd | Education | 2022 |
| DEL Horta Limited | Real estate | 1999 |
| Delal GUL Limited | Health & social care | 2021 |
| Delhi 39 Limited | Hospitality | 2026 |
| Delight Properties Ltd | Real estate | 2022 |
| Deluxe by Temmy Ltd | Wholesale & retail | 2026 |
| Deluxe Nails & Beauty Limited | Other services | 2021 |
| Demason Limited | Real estate | 2026 |
| Denisa V Limited | Other services | 2025 |
| Deniz Beck Partners Limited | Professional & scientific | 2012 |
| Deniz Engineering Ltd | Professional & scientific | 2025 |
| Denton Property Law Limited | Professional & scientific | 2020 |
| Denton Property Limited | Real estate | 2020 |
| Denyer & Sons Building and Carpentry Ltd | Construction | 2025 |
| Dera Solutions Ltd | Administrative & support | 2024 |
| Detached Homes Limited | Information & communication | 2015 |
| Deuko Ivan Dorian Ltd | Wholesale & retail | 2025 |
| Devdabs Limited | Information & communication | 2025 |
| Develop Infinity Limited | Real estate | 2026 |
| Deville and Winner Estates Limited | Real estate | 2025 |
| DF Rental Limited | Financial services | 2016 |
| DFG Style Ltd | Professional & scientific | 2020 |
| Diamas Homes Limited | Real estate | 2024 |
| Diamond DEC Ltd | Construction | 2025 |
| Diamond Style Car Ltd | Wholesale & retail | 2023 |
| Dick Bros Ltd | Transport & logistics | 2023 |
| Dicksons Construction and Crane Services Ltd | Construction | 2015 |
| Dienvidanglijas Luterāņu Draudze Community Interest Company | Education | 2026 |
| Digital Advisory Limited | Information & communication | 2019 |
| Digital Marketing Engineer Ltd | Information & communication | 2015 |
| Digital Muti Ltd | Information & communication | 2024 |
| Digital Strategies IT Limited | Information & communication | 2025 |
| Digitally Fine Ltd | Wholesale & retail | 2023 |
| Dils Properties Ltd | Real estate | 2025 |
| Dimjo Ltd | Health & social care | 2023 |
| Dimond Property’S Ltd | Real estate | 2026 |
| Dine in Technology Limited | Hospitality | 2012 |
| Dine With Dina Ltd | Hospitality | 2019 |
| Dipest Pest Control Limited | Professional & scientific | 2011 |
| Direct Payroll Ltd | Professional & scientific | 2025 |
| Directprs Limited | Professional & scientific | 2024 |
| Dispatch Express Ltd | Transport & logistics | 2013 |
| Disrupt Tech Ltd | Other services | 2024 |
| Distinctive Dwellings Ltd | Financial services | 2024 |
| Diversum & Jucundus Limited | Real estate | 2021 |
| Divya Purewal Limited | Wholesale & retail | 2017 |
| DJB Recovery Ltd | Wholesale & retail | 2020 |
| DJJ Lettings Limited | Real estate | 2026 |
| DJP & Associates Ltd | Professional & scientific | 2006 |
| DJW IT Consulting Ltd | Information & communication | 2021 |
| DLP Holdings Ltd | Financial services | 2024 |
| DLP Lettings Ltd | Real estate | 2024 |
| DMC5 Cambridge Mews Limited | Real estate | 2019 |
| Dmeg Limited | Professional & scientific | 2014 |
| DML Property Portfolio Limited | Real estate | 2025 |
| Dmoyos Ltd | Health & social care | 2020 |
| Do'Mo Drinks Limited | Manufacturing | 2023 |
| DOM Properties (Portsmouth) Limited | Real estate | 2019 |
| Domestic Structural Consultancy Limited | Professional & scientific | 2016 |
| Dominat Limited | Wholesale & retail | 2024 |
| Domus Construction Service Ltd | Construction | 2013 |
| Donami Engineering Ltd | Professional & scientific | 2022 |
| Donstruction Ltd | Construction | 2024 |
| Doris Edith Court RTM Company Limited | Households | 2020 |
| Dorm Care Ltd | Wholesale & retail | 2024 |
| Douglasag Ltd | Construction | 2026 |
| Dover House Management (Southsea) Limited | Households | 2001 |
| Down to Earth Drainage Ltd | Construction | 2025 |
| Downtown Pompey C.I.C. | Health & social care | 2020 |
| DPB Integrated Solutions Limited | Information & communication | 2024 |