| Dalal Investments Ltd | Real estate | 2021 |
| Dale and Newbery LLP | | 2011 |
| Dallas-Int Ltd | Wholesale & retail | 2021 |
| Dallyn House Management Limited | Households | 1991 |
| DAM Fine Marketing Ltd | Professional & scientific | 2026 |
| DAN Brown Electrical Ltd | Other services | 2019 |
| Danewal Services Limited | Administrative & support | 2022 |
| Daniel Rampling Ltd | Health & social care | 2024 |
| Danver Consulting Ltd | Professional & scientific | 2021 |
| Darali Trans Ltd | Transport & logistics | 2017 |
| Darali World Ltd | Transport & logistics | 2016 |
| Darren Sunley Consulting Ltd | Information & communication | 2022 |
| Darshan Property Group Ltd | Households | 2025 |
| Dassan Limited | Administrative & support | 2024 |
| Data Orbit Technology Services Limited | Information & communication | 2024 |
| Dawn to Dusk Builders Ltd | Construction | 2022 |
| Day Night Car Ltd | Wholesale & retail | 2026 |
| Daya Couriers Ltd | Transport & logistics | 2018 |
| Dayton Computers Limited | Real estate | 1992 |
| DB Smart Transport Limited | Transport & logistics | 2022 |
| Dbad Services Ltd | Administrative & support | 2024 |
| Dcei Limited | Hospitality | 2021 |
| Dcfm Ltd | Construction | 2025 |
| DD Investment Group Ltd | Real estate | 2020 |
| Ddparts Ltd | Wholesale & retail | 2025 |
| DE Leeuw (London) Limited | Construction | 2018 |
| Deacon Plumbing and Heating Ltd | Construction | 2016 |
| Deans Foods Limited | Extraterritorial | 1991 |
| Deekam Limited | Real estate | 2025 |
| Deep Builders Limited | Construction | 2014 |
| Deep Thought Analytics Limited | Administrative & support | 2011 |
| DEH & P Ltd | Construction | 2013 |
| DEL Monte (UK) Limited | Wholesale & retail | 1989 |
| DEL Monte Europe Limited | Manufacturing | 1926 |
| DEL Monte Foods International Limited | Wholesale & retail | 1989 |
| Delamere Estates Limited | Real estate | 1985 |
| Delamere Property Group Limited | Construction | 2018 |
| Delectable Group Ltd | Professional & scientific | 2024 |
| Delhome Ltd | Wholesale & retail | 2016 |
| Delicious Pizza (Ashford) Ltd | Hospitality | 2019 |
| Delightsome Logistics Ltd | Transport & logistics | 2013 |
| Deliveryhelp Ltd | Transport & logistics | 2017 |
| Deliwala Properties Ltd | Real estate | 2022 |
| Delta Aero Asset Ltd | Information & communication | 2025 |
| Delta House Rentals Limited | Real estate | 2022 |
| Democore Group Limited | Construction | 2026 |
| Denham Real Estate Limited | Real estate | 2019 |
| Denning Gates Ltd | Administrative & support | 2023 |
| Dentons Delany 2 LLP | | 2021 |
| Deol Brothers Transport Ltd | Transport & logistics | 2020 |
| Derbysoft (UK) Limited | Information & communication | 2017 |
| DES Group Limited | Manufacturing | 2001 |
| DES Services 2017 Limited | Financial services | 2017 |
| Desi Banter Ltd | Wholesale & retail | 2023 |
| Desi Foods Ltd | Hospitality | 2025 |
| Design & Engineering Services Limited | Extraterritorial | 1985 |
| Design a Body Clinic Limited | Health & social care | 2026 |
| Designed Architectural Lighting Co Limited | Manufacturing | 2020 |
| Designggroup Ltd | Manufacturing | 2020 |
| Designing Science Ltd | Professional & scientific | 2018 |
| Detail Autos Limited | Wholesale & retail | 2023 |
| Detector Electronics (U.K.) Limited | Administrative & support | 1982 |
| Deutsche Post Global Mail (UK) Limited | Transport & logistics | 1987 |
| Devhaan Construction Ltd | Construction | 2025 |
| Devshare Ltd | Construction | 2026 |
| Dewhurst Services Ltd | Professional & scientific | 2022 |
| DFD Construction Ltd | Construction | 2021 |
| Dgcs Assistance Limited | Transport & logistics | 2025 |
| Dhillon Developers Ltd | Real estate | 2020 |
| Dhillon International Properties Ltd | Financial services | 2015 |
| Dhillon Logistics & Distribution Ltd | Transport & logistics | 2026 |
| Dhillon London Ltd | Transport & logistics | 2016 |
| DHL Express (UK) Limited | Transport & logistics | 1988 |
| DHL Global Forwarding (UK) Limited | Transport & logistics | 2000 |
| Dibd Freehold Management Ltd | Real estate | 2011 |
| Dice Limited | Information & communication | 1989 |
| DIE Card Ltd. | Wholesale & retail | 2019 |
| Diesel Cleaning Services Limited | Other services | 2016 |
| Differentiation Academy Limited | Education | 2025 |
| Digital Arts Europe Limited | Information & communication | 2011 |
| Digital Comrades Ltd | Wholesale & retail | 2024 |
| Digital Daily Deals Limited | Administrative & support | 2025 |
| Digitalead AI Ltd | Information & communication | 2026 |
| Digitalead Ltd | Information & communication | 2022 |
| Diligent MV Ltd | Manufacturing | 2025 |
| Dilsia Limited | Real estate | 2020 |
| Dimex Shipping Ltd | Transport & logistics | 2011 |
| Dine Essentials Ltd | Wholesale & retail | 2023 |
| Dinira Trading Limited T/A Shanthi Expeditions Ltd | Administrative & support | 2025 |
| Direct GP Solutions Limited | Wholesale & retail | 2024 |
| Discoverme-Uk Ltd | Information & communication | 2025 |
| Disruptors Ltd | Transport & logistics | 2016 |
| DIU Ltd | Wholesale & retail | 2024 |
| Diverse Talent Networks Ltd | Administrative & support | 2021 |
| DJ Import and Export Limited | Wholesale & retail | 2009 |
| DJF Lofts and Extensions Ltd | Construction | 2024 |
| DJF Tiling & Bathrooms Ltd | Construction | 2026 |
| DNA Rugby Ltd | Arts & recreation | 2020 |
| Dnvn Ltd | Professional & scientific | 2023 |
| Docpops Ltd | Hospitality | 2022 |