| D & B Haulage Ltd | Transport & logistics | 2013 |
| D & F Services UK Ltd | Hospitality | 2025 |
| D & S Business Solutions Ltd | Professional & scientific | 2023 |
| D and D Retailer Limited | Manufacturing | 2026 |
| D J P Promotions Limited | Arts & recreation | 2018 |
| D K Homes Ltd | Real estate | 2017 |
| D M Aviation Ltd | Wholesale & retail | 2024 |
| D Royale Ltd | Energy | 2013 |
| D&A&G Limited | Professional & scientific | 2023 |
| D&I Foods Ltd | Manufacturing | 2018 |
| D&N Electrics Ltd | Construction | 2021 |
| D&Z Breakfast and Lunch Point Ltd | Hospitality | 2026 |
| D.J&K Co Ltd | Real estate | 2015 |
| D2D Foods Ltd | Wholesale & retail | 2021 |
| D2D Wholesaler and Distributor Ltd | Wholesale & retail | 2025 |
| D2P Billericay Ltd | Construction | 2023 |
| D2P Burton END Limited | Real estate | 2023 |
| D2P Capital Ltd | Real estate | 2021 |
| D2P Hook END Limited | Real estate | 2024 |
| D2P Pilton Ltd | Real estate | 2023 |
| D2SUCCESS Ltd | Education | 2026 |
| DA & Co Delicious Limited | Hospitality | 2025 |
| Da&G Limited | Construction | 2023 |
| Daabley Transport Ltd | Transport & logistics | 2025 |
| Daat & Co Limited | Wholesale & retail | 2024 |
| Dabba Wala Ltd | Manufacturing | 2023 |
| Dada Global Ltd | Transport & logistics | 2024 |
| Dadwar Ltd | Manufacturing | 2024 |
| Dafan Service Ltd Ltd | Construction | 2025 |
| Dafan Trading Ltd | Health & social care | 2015 |
| Daheru Holdings Ltd | Real estate | 2026 |
| Daily Cash & Carry Limited | Wholesale & retail | 2026 |
| Daily Fresh 4YOU Ltd | Wholesale & retail | 2024 |
| Daily Need Bargain Limited | Wholesale & retail | 2025 |
| Daily Supplies UK Ltd | Wholesale & retail | 2025 |
| Daina Construction Ltd | Construction | 2022 |
| Daisy Homecare Services Ltd | Administrative & support | 2024 |
| Daizy Services Ltd T/A Sim's Holistic Care Ltd. | Other services | 2017 |
| DAK Property Ltd | Real estate | 2019 |
| Dakhar Ltd | Transport & logistics | 2019 |
| Daks UK Ltd | Manufacturing | 2023 |
| Daku Records Ltd | Extraterritorial | 2012 |
| Dalexcons Limited | Construction | 2024 |
| Dalimation Ltd | Information & communication | 2024 |
| Damages R US Ltd | Wholesale & retail | 2023 |
| Damas Kitchen Ltd | Hospitality | 2022 |
| Damini Consulting Limited | Construction | 2025 |
| Damytrans Ltd | Transport & logistics | 2020 |
| DAN Care Limited | Financial services | 2004 |
| DAN Leru Ltd | Transport & logistics | 2025 |
| Dancin Gear Limited | Wholesale & retail | 2017 |
| Dangercode Ltd | Manufacturing | 2019 |
| Dangerous Goods International UK Limited | Transport & logistics | 2007 |
| Daniels & Kumar Ltd | Real estate | 2018 |
| Danielscafe Ltd | Hospitality | 2025 |
| Danish Accountants Ltd | Professional & scientific | 2025 |
| Danmark Fashion Ltd | Wholesale & retail | 2023 |
| Danoj Developments UK Limited | Construction | 2023 |
| Danoj Management Services Ltd | Administrative & support | 2017 |
| Dany & ANY Construct Ltd | Construction | 2024 |
| Daphne Estates Limited | Real estate | 2022 |
| Darbin Properties Ltd | Real estate | 2025 |
| Darkhood Studioz Ltd | Information & communication | 2025 |
| Darr Zaid Ltd | Wholesale & retail | 2026 |
| Darren C Physiotherapy Ltd | Health & social care | 2014 |
| Dart Global Logistics Limited | Transport & logistics | 2020 |
| Darvesh Housing Limited | Real estate | 2024 |
| Dascalu Jfkc Estate Limited | Real estate | 2022 |
| Dashing Hair & Beauty Ltd | Other services | 2023 |
| DASILVA07 Ltd | Real estate | 2026 |
| Data Empire Global Ltd | Wholesale & retail | 2025 |
| Data Entry Ltd | Other services | 2021 |
| Data Synce Ltd | Information & communication | 2020 |
| Data Trans Technologies Limited | Information & communication | 2019 |
| Databuddy Ltd | Professional & scientific | 2023 |
| Dataflow Management Consultants Limited | Professional & scientific | 1993 |
| Dave Electrical Services Limited | Construction | 2019 |
| Dave Property Ltd | Real estate | 2025 |
| David Carver Ltd | Administrative & support | 2023 |
| Davidbui Limited | Information & communication | 2011 |
| Davincy 99 Limited | Construction | 2026 |
| Dawat Palace Limited | Hospitality | 2024 |
| Dawer & Co Limited | Professional & scientific | 2011 |
| Dawood UK Investment Ltd | Transport & logistics | 2022 |
| Day a Developments Limited | Construction | 2019 |
| Dayle Logistics Ltd | Transport & logistics | 2025 |
| Dayton Rayleigh Solicitors Ltd | Professional & scientific | 2023 |
| DB Consultant & Projects (UK) Limited | Information & communication | 2017 |
| DBA Hospitality UK Limited | Hospitality | 2025 |
| DBA Ventures UK Limited | Hospitality | 2025 |
| DBF Services Ltd | Construction | 2025 |
| DBL S Team Management Property Ltd | Real estate | 2020 |
| DBM Property Services Ltd | Construction | 2007 |
| Dbrr Contractors Ltd | Construction | 2025 |
| Dbrr Ltd | Construction | 2025 |
| DC Logistics Ltd | Transport & logistics | 2023 |
| DDL Commercial Trade.Co.Uk Ltd | Construction | 2017 |
| Ddlc Digital Ltd | Wholesale & retail | 2026 |
| DDN Holdings Limited | Construction | 2015 |
| DDY Ltd | Construction | 2026 |