| Curae Limited | Professional & scientific | 2011 |
| Cured Meat Masters Ltd | Manufacturing | 2026 |
| Curian Holdings Limited | Financial services | 2014 |
| Curian Medical Ltd | Health & social care | 2011 |
| Curohosting Limited | Information & communication | 2017 |
| Current Voltage Electrical Limited | Construction | 2014 |
| Curry (TF3) Co Ltd | Hospitality | 2024 |
| Curtainland Ltd | Manufacturing | 2025 |
| Curzon Estates Limited | Professional & scientific | 1958 |
| Cush-N-Craft Ltd | Manufacturing | 2022 |
| Custom Oak Ltd | Manufacturing | 2017 |
| Custome Jewellery Ltd | Manufacturing | 2025 |
| Cutz & Bladez Oakengates Ltd | Other services | 2026 |
| Cuub Consultancy Ltd | Information & communication | 2017 |
| CVP Management Limited | Real estate | 2013 |
| CWE Property Ltd | Administrative & support | 2024 |
| Cxsper Ltd | Information & communication | 2025 |
| Cyber Data Services Limited | Information & communication | 2025 |
| Cyberaware World Ltd | Information & communication | 2023 |
| Cyberburn Solutions Limited | Professional & scientific | 2024 |
| Cyrussmith Healthcare Limited | Financial services | 2025 |
| D & D Carpentry & Building Limited | Construction | 2024 |
| D & E Properties (Northern) Ltd | Real estate | 2006 |
| D & K Steel Architectural Limited | Construction | 2016 |
| D & L Restaurants Ltd | Hospitality | 2022 |
| D a Board Management Ltd | Construction | 2022 |
| D and R Electrical Ltd | Construction | 2010 |
| D B Waterworks Limited | Water & waste | 2014 |
| D Darius Carpenters Ltd | Construction | 2011 |
| D E Ball & Co Limited | Professional & scientific | 2002 |
| D Fitness UK Ltd | Arts & recreation | 2021 |
| D J Gwynne & SON Limited | Agriculture & fishing | 2008 |
| D Maan Properties Ltd | Real estate | 2020 |
| D Mcgee Services Limited | Construction | 2012 |
| D R H Electrical Contractors Limited | Construction | 2007 |
| D Smith Building Limited | Construction | 2011 |
| D Timmins Limited | Hospitality | 2021 |
| D&D Quality Steelfixing Ltd | Construction | 2024 |
| D&D Tree Service Ltd | Administrative & support | 2026 |
| D'Vybe Ltd | Administrative & support | 2023 |
| D+S Engineering Services Ltd | Manufacturing | 2000 |
| D-Line (Europe) Limited | Manufacturing | 2004 |
| D. B. Coatings Limited | Administrative & support | 2009 |
| D. O. Motors Limited | Wholesale & retail | 2026 |
| D.A. Events and Entertainment Limited | Construction | 1999 |
| D.A.W. Property Maintenance (Telford) Limited | Construction | 2020 |
| D.Colleys Property Group Limited | Real estate | 2025 |
| D.D Quality Limited | Other services | 2013 |
| D.G.Handley Ltd | Wholesale & retail | 2025 |
| D.J.C. Lightweight Roofing Limited | Construction | 2001 |
| D.O Developments Ltd | Construction | 2021 |
| D.P.C Property Management Ltd | Real estate | 2014 |
| D.R Diagnostic & Repairs Ltd | Wholesale & retail | 2024 |
| D.V. Williams (Transport) Limited | Extraterritorial | 1990 |
| D.W. Windsor Limited | Manufacturing | 1977 |
| D.Worgan Ltd | Transport & logistics | 2021 |
| D365 Consulting Group Limited | Information & communication | 2021 |
| D82 Limited | Financial services | 2019 |
| Da'Ville Lettings Limited | Real estate | 2007 |
| Da-Beatz Promotions Ltd | Administrative & support | 2017 |
| Dacc Trans Limited | Transport & logistics | 2021 |
| Dactar Ltd | Other services | 2020 |
| Dagred Ltd | Other services | 2019 |
| DAI Suki GOI Limited | Wholesale & retail | 2000 |
| Daiahs Logistics and Supply Ltd | Transport & logistics | 2026 |
| Daily Care 4 U (Telford) Ltd | Health & social care | 2016 |
| Daisy Hughes Ltd | Arts & recreation | 2025 |
| Dalamxis Ltd | Other services | 2019 |
| Dale Brothers U.K. Limited | Transport & logistics | 2001 |
| Dale END Holdings Ltd | Real estate | 2025 |
| Dale END Storage Ltd. | Construction | 2006 |
| Dale Inns Limited | Hospitality | 2023 |
| Dampguard & Plastering Limited | Construction | 2007 |
| Damson Engineering Projects Limited | Professional & scientific | 2024 |
| Damtime Ltd | Other services | 2020 |
| DAN Francis Cars Ltd | Wholesale & retail | 2024 |
| DAN Lane Ltd | Construction | 2017 |
| Dandy Decorating Services Ltd | Construction | 2026 |
| Dandylion Games Ltd | Information & communication | 2025 |
| Danescourt Accountancy Ltd | Financial services | 2014 |
| Daniclean Ltd | Administrative & support | 2026 |
| Daniel Marine Ltd | Professional & scientific | 2026 |
| Danif Ltd | Other services | 2018 |
| Danjo & Co Financial Ltd | Financial services | 2019 |
| Dankels Ltd | Wholesale & retail | 2025 |
| Danny Services Ltd | Financial services | 2026 |
| Dannytrans Ltd | Transport & logistics | 2024 |
| Dansco Trading Limited | Real estate | 2017 |
| Dansix Ltd | Other services | 2018 |
| Danso & Family Limited | Health & social care | 2013 |
| Dante Tiling & Flooring Ltd | Construction | 2018 |
| Dantiball Ltd | Other services | 2019 |
| Daphne Enterprises Limited | Financial services | 2024 |
| Darcars Transport Ltd | Transport & logistics | 2018 |
| Dariusz & Sons Limited | Transport & logistics | 2013 |
| Daro Builders Limited | Construction | 2024 |
| Dartmoor Enterprises Limited | Manufacturing | 2023 |
| Darwin Financial Management Limited | Financial services | 2004 |
| Dasbas Ltd | Other services | 2020 |
| Dash Agency Limited | Professional & scientific | 2023 |