| Digital Customer Experience Limited | Professional & scientific | 2024 |
| Digital Directive Limited | Information & communication | 2016 |
| Digital DRY Dock Ltd | Information & communication | 2020 |
| Digital Evolutions Limited | Information & communication | 2003 |
| Digital Invento Ltd | Information & communication | 2024 |
| Digital Rail Solutions Ltd | Construction | 2022 |
| Digital Sales Academy Ltd | Professional & scientific | 2025 |
| Digital Seeds Limited | Extraterritorial | 2016 |
| Digital Shop Ltd | Wholesale & retail | 2021 |
| Digital Tech Hub Ltd | Information & communication | 2025 |
| Digitaljessica Ltd | Information & communication | 2018 |
| Digitalprompt Limited | Wholesale & retail | 2010 |
| Digitaltech Holding Ltd | Education | 2022 |
| Digitaly Growth Ltd | Information & communication | 2025 |
| Digitel Communication Systems Ltd | Information & communication | 1997 |
| Digiteller Ltd. | Information & communication | 2014 |
| Digitizecom Ltd | Wholesale & retail | 2023 |
| Digiuplift Ltd | Information & communication | 2025 |
| Dikmenli Ltd | Hospitality | 2022 |
| Dillmans Ltd | Information & communication | 2024 |
| Dimensions Building Services Limited | Construction | 2008 |
| Dimiconbr Limited | Wholesale & retail | 2025 |
| Dimix Studios Ltd | Information & communication | 2025 |
| Dimond Health & Aesthetic Clinic Ltd | Health & social care | 2020 |
| Dina Ashersmith Ltd | Arts & recreation | 2013 |
| Dina Zone Catering Ltd | Hospitality | 2022 |
| Dinaco Products Ltd | Wholesale & retail | 2022 |
| Dining Italian Ltd | Hospitality | 2026 |
| Diplomat Property Ltd | Real estate | 2023 |
| Direct Back Office Limited | Administrative & support | 2022 |
| Direct CFO Ltd | Professional & scientific | 2025 |
| Direct Cleaning Southern Ltd | Administrative & support | 2026 |
| Direct Energy Solutions SW Ltd | Information & communication | 2023 |
| Direct Mini MIX Limited | Construction | 2018 |
| Direct Roofing and Scaffolding Services Limited | Construction | 2024 |
| Direct Sand and Gravel Limited | Extraterritorial | 2024 |
| Direct Studio Limited | Wholesale & retail | 2025 |
| Direction Marketing and Communications Limited | Professional & scientific | 1994 |
| Directpath Communications Limited | Information & communication | 2025 |
| Dirt Sounds Ltd | Professional & scientific | 2021 |
| Dirt Worx Limited | Wholesale & retail | 2020 |
| Disaster Productions Limited | Information & communication | 2022 |
| Disciples of Gaming Ltd | Information & communication | 2025 |
| Discreet Temptations Ltd | Wholesale & retail | 2021 |
| Disen Ltd | Wholesale & retail | 2019 |
| Display Tech 3D Ltd | Information & communication | 2021 |
| Disposable Heroes Ltd | Administrative & support | 2021 |
| Distant Views RTM Company Limited | Households | 2024 |
| Diutius Ltd | Financial services | 2025 |
| Divergence Ltd | Wholesale & retail | 2019 |
| Divergent Matrix Limited | Information & communication | 2023 |
| Diverse Abilities Plus Ltd | Education | 1981 |
| Diversity Cleaning Services Ltd | Administrative & support | 2025 |
| Diveworks International Limited | Other services | 2020 |
| Dividendchase Ltd | Information & communication | 2025 |
| Divine Angels Collective Ltd | Wholesale & retail | 2026 |
| Divine Donate Ltd | Information & communication | 2025 |
| Divine Healing Ltd | Health & social care | 2022 |
| Diving Matrix Limited | Education | 1997 |
| Divingbeck Ltd | Construction | 2024 |
| Dixon Global Ltd | Professional & scientific | 2024 |
| Dixon Investment Holdings Ltd | Real estate | 2020 |
| DIY Interior Ltd | Wholesale & retail | 2018 |
| DIY Postergallery Ltd | Information & communication | 2017 |
| DIY Stationery Limited | Wholesale & retail | 2017 |
| Dizzy Co Designs Ltd | Arts & recreation | 2023 |
| DJ BR4D Ltd | Arts & recreation | 2022 |
| DJ Daysher Ltd | Arts & recreation | 2023 |
| DJ Digital Solutions Ltd | Information & communication | 2023 |
| DJ Electrical Contractors Ltd | Construction | 2014 |
| DJG Systems Limited | Wholesale & retail | 2019 |
| DJK Groundworks Ltd | Construction | 2026 |
| DJL Property Development Limited | Real estate | 2024 |
| Djlogi Ltd | Wholesale & retail | 2025 |
| DJP Tinkers Consultancy Ltd | Arts & recreation | 2013 |
| Djuno Ltd | Information & communication | 2020 |
| DJW Photography Ltd | Professional & scientific | 2025 |
| DK Equity Holdings Limited | Financial services | 2025 |
| DK Exploration Ltd | Other services | 2025 |
| DKA2 Ltd | Energy | 2026 |
| Dkrj Elec Ltd | Manufacturing | 2025 |
| DKW Holdings Ltd | Manufacturing | 2021 |
| DL Pressure Cleaning Limited | Administrative & support | 2014 |
| DLB Bournemouth Ltd | Arts & recreation | 2019 |
| DLC Investment Properties Limited | Construction | 2016 |
| DLF Solutions Limited | Professional & scientific | 2025 |
| DLI Mortgages Ltd | Financial services | 2025 |
| Dlmf Limited | Construction | 2025 |
| Dlta Ltd | Administrative & support | 2025 |
| Dltsm Properties Ltd | Real estate | 2025 |
| DM Briggs Transport Ltd | Transport & logistics | 2018 |
| Dm&D Consulting Ltd | Information & communication | 2026 |
| Dm-Marine Ltd | Construction | 2019 |
| DMA Electrical Contractors Limited | Construction | 2022 |
| DMC GRP Laminating Ltd | Manufacturing | 2022 |
| DMG Heating & Plumbing Ltd | Construction | 2010 |
| Dmrs Consulting Limited | Professional & scientific | 2020 |
| DNA Construction Management Limited | Professional & scientific | 2021 |
| DNA Plastering and Spray Rendering Ltd | Construction | 2025 |
| DNA Prestige Ltd | Construction | 2011 |