| CUT and Run Hair Ltd | Other services | 2018 |
| Cutting Edge Interiors Ltd | Manufacturing | 2020 |
| Cyber-Logica Limited | Information & communication | 2024 |
| Cybercore Innovations Limited | Wholesale & retail | 2024 |
| CYR Estates Limited | Real estate | 2023 |
| D & B UK Investments Limited | Real estate | 2016 |
| D & K P Properties Limited | Real estate | 2019 |
| D & R Nicolas Properties Ltd | Real estate | 2024 |
| D a Mcneil Electrical Limited | Construction | 2012 |
| D C H General Builders Ltd | Construction | 2004 |
| D E Homeware Limited | Wholesale & retail | 2021 |
| D F Burke Tiling Limited | Construction | 2015 |
| D J Domestic's Appliances Limited | Other services | 2002 |
| D J Shepherd Advisory Services Limited | Administrative & support | 2021 |
| D M Samuels Ltd | Health & social care | 2011 |
| D P Builders Disabled Adaptations Ltd | Construction | 2003 |
| D Phypers Builders Limited | Construction | 2020 |
| D Sparwell Roofing Ltd | Construction | 2024 |
| D&B Car Key Ltd | Wholesale & retail | 2020 |
| D&B Direct Ltd | Wholesale & retail | 2022 |
| D&D Direct Solutions Ltd | Wholesale & retail | 2021 |
| D&D Gardens Ltd | Wholesale & retail | 2016 |
| D&G S Properties Limited | Real estate | 2023 |
| D&M Energy Services Ltd | Construction | 2021 |
| D&S Bilen Ltd | Real estate | 2026 |
| D&S Gifts Ltd | Wholesale & retail | 2018 |
| D&S Property and Estate Management Ltd | Real estate | 2022 |
| D-Curious Ltd | Hospitality | 2026 |
| D-Fran.Tv Limited | Information & communication | 2020 |
| D-Mech Group Ltd | Construction | 2023 |
| D. Mooney Ltd | Administrative & support | 2016 |
| D.Right.Estates Limited | Real estate | 2024 |
| DA Lune Clinic Ltd | Other services | 2025 |
| Daciz Ltd | Real estate | 2024 |
| DAD1 Ltd | Wholesale & retail | 2026 |
| Daffodil Investments Ltd | Financial services | 2025 |
| Dagli Trading Ltd | Manufacturing | 2018 |
| Dahlia Accounting Limited | Professional & scientific | 2023 |
| Daily Rituals Ltd | Wholesale & retail | 2026 |
| Daleth Limited | Wholesale & retail | 2023 |
| Dalmuinzie Capital Ltd | Financial services | 2022 |
| Dalston Crystals Limited | Other services | 2022 |
| Damreb Consultancy Ltd | Information & communication | 2015 |
| DAN & KEN UK Limited | Professional & scientific | 2018 |
| DAN Smith Consulting Limited | Information & communication | 2022 |
| Dan's Business Solutions Ltd | Administrative & support | 2019 |
| Danaproperty Ltd | Real estate | 2025 |
| Dandan Robin Tattoos Ltd | Other services | 2022 |
| Dandigital Ltd | Professional & scientific | 2019 |
| Danemead Ltd | Real estate | 2020 |
| Danescroft Torrington Park Management Limited | Extraterritorial | 1977 |
| Daneve Limited | Wholesale & retail | 2024 |
| Daneve Properties Limited | Real estate | 2025 |
| Dangerous Expedition Ltd | Transport & logistics | 2017 |
| Dani Painting Ltd | Construction | 2021 |
| Danielle Fire Alarms Ltd | Construction | 2021 |
| Danielle Lane & Associates Ltd | Professional & scientific | 2014 |
| Danito Group Limited | Construction | 2010 |
| Danlex Development Limited | Professional & scientific | 2014 |
| Danny DE Barber Limited | Other services | 2023 |
| Danso Limited | Real estate | 2007 |
| Dany 83 Ltd | Construction | 2014 |
| DAP Property Ltd | Households | 2019 |
| Darkon Systems Limited | Professional & scientific | 2025 |
| Darnicle Limited | Extraterritorial | 2008 |
| Darren James Dutch Ltd | Professional & scientific | 2016 |
| Dasclean Services Ltd | Administrative & support | 2025 |
| Dase Global Limited | Wholesale & retail | 2025 |
| Dashen Property Acquisitions Ltd | Real estate | 2023 |
| Dashen Retailing and Catering Services Ltd | Manufacturing | 2023 |
| Dashen Ventures Ltd | Hospitality | 2014 |
| Data Puppeteer Ltd | Information & communication | 2022 |
| Dava Water Limited | Manufacturing | 2024 |
| David & Ainoa Property Ltd | Real estate | 2025 |
| David Arthur Properties Limited | Households | 2026 |
| David James Property Ltd | Real estate | 2024 |
| David Michael Consultancy Services Limited | Professional & scientific | 2011 |
| Davin Foods Limited | Manufacturing | 1979 |
| Davinajayne Ltd | Wholesale & retail | 2017 |
| Dayi TOK Limited | Hospitality | 2019 |
| Dayzy Limited | Information & communication | 2013 |
| Dazzling Darlings Ltd | Other services | 2012 |
| DB Residential Management Ltd | Real estate | 2020 |
| Dblr Ltd | Construction | 2018 |
| DBT MR Company Ltd | Information & communication | 2022 |
| DC Solutions Services Ltd | Administrative & support | 2025 |
| DC Venetian Ltd | Other services | 2023 |
| Dc&C Contractors Ltd | Manufacturing | 2026 |
| Dcosta Heating Solutions Ltd | Construction | 2021 |
| DCS Construction Limited | Construction | 2002 |
| Ddmi Property Ltd | Real estate | 2024 |
| DE Medias Marketing Limited | Professional & scientific | 2024 |
| DEA Ltd | Transport & logistics | 2025 |
| Deal Property Solutions Ltd | Real estate | 2022 |
| Dean Murphy ( UK ) Ltd | Construction | 2020 |
| Dean Murphy Ltd | Construction | 2002 |
| Deane Holdings & Investments Ltd | Real estate | 2025 |
| Debbie Contracts Ltd | Administrative & support | 2015 |
| Decofine Limited | Manufacturing | 2019 |
| Decologic Ltd | Transport & logistics | 2016 |