| CWG SPV1 Limited | Real estate | 2026 |
| CWG SPV2 Limited | Real estate | 2026 |
| CXD Studio Ltd | Professional & scientific | 2023 |
| Cxla Ltd | Information & communication | 2013 |
| CXN Limited | Wholesale & retail | 2021 |
| Cyber Security Limited | Information & communication | 2007 |
| Cybercoreit Ltd | Information & communication | 2024 |
| Cyberexact Ltd | Information & communication | 2026 |
| Cycle Workshop Ltd | Manufacturing | 2025 |
| Cyonic Limited | Information & communication | 2024 |
| D & H Cosgrove Ltd | Professional & scientific | 2022 |
| D and H Crane Hire Ltd | Construction | 2020 |
| D and H Oak Framing Ltd | Construction | 2016 |
| D C T Accounting Ltd | Professional & scientific | 2008 |
| D E Heating Limited | Construction | 2017 |
| D J Hendry Consulting Ltd | Professional & scientific | 2024 |
| D M Automation Ltd | Administrative & support | 2023 |
| D M Nitman Ltd | Construction | 2002 |
| D Todd Gardening Services Ltd | Administrative & support | 2015 |
| D&D Cafe Ltd | Hospitality | 2023 |
| D&G Strategies Ltd | Real estate | 2022 |
| D'Arcy's Wine Bar Ltd | Hospitality | 2023 |
| D'Rvnz Engg Limited | Professional & scientific | 2023 |
| D. Durrant Removals Ltd | Administrative & support | 2004 |
| D. Hamilton-Irvine Associates Limited | Professional & scientific | 2002 |
| D. R. Grady Tree Surgery Ltd | Agriculture & fishing | 2022 |
| D.A.S. Holdings Limited | Extraterritorial | 1992 |
| D.Dark Ltd. | Agriculture & fishing | 2022 |
| D.J. Buckman Limited | Wholesale & retail | 2004 |
| D.W.F. Sports Limited | Arts & recreation | 1980 |
| D2XCHANGE UK Ltd | Information & communication | 2018 |
| D3 Farms & Stables Limited | Agriculture & fishing | 2018 |
| D3 Studio Ltd | Information & communication | 2013 |
| D8R Ltd | Construction | 2025 |
| DAB Hands Just Cuts Limited | Other services | 2005 |
| DAG Scaffolding Limited | Construction | 1999 |
| Daily Market Ltd | Other services | 2025 |
| Daily Microgreens Ltd | Wholesale & retail | 2022 |
| Daily Pick Ltd | Agriculture & fishing | 2022 |
| Dainty Care Solutions Ltd | Administrative & support | 2023 |
| Dairy Court Flat Management Limited | Households | 2020 |
| Dale Close Management Limited | Households | 1966 |
| Dale Electrical Banstead Ltd | Construction | 2013 |
| Dalriada Aerospace Holding Ltd | Other services | 2016 |
| DAN Crow Consulting Ltd | Professional & scientific | 2020 |
| Dandelion Farewells Limited | Other services | 2014 |
| Dandelion Funerals Limited | Extraterritorial | 2014 |
| Dane Carpentry & Joinery Limited | Construction | 2014 |
| Danesview Construction Ltd | Construction | 2024 |
| Danial FOX Consultancy Limited | Health & social care | 2012 |
| Danielle Emerson Ltd | Other services | 2023 |
| Danielle Lindfield Limited | Professional & scientific | 2024 |
| Danish Ventures Ltd | Financial services | 2015 |
| Dare to Shine Wellbeing Ltd | Health & social care | 2026 |
| Darecorp Developments Limited | Arts & recreation | 1992 |
| Darkover Accountancy Services Limited | Professional & scientific | 2025 |
| Darran Brady Plumbing & Heating Ltd | Construction | 2010 |
| DAS Footcare Ltd | Health & social care | 2016 |
| Dasan TX Ltd | Administrative & support | 2026 |
| Dashing Management Ltd | Households | 2019 |
| Datacollege Ltd | Information & communication | 2005 |
| Dataworks Consultancy Ltd | Information & communication | 2025 |
| Daughter of Afrika Ltd | Wholesale & retail | 2014 |
| Daux Agricultural Limited | Professional & scientific | 1965 |
| DAV Media Ltd | Construction | 2016 |
| Dave Owen Engineering Services Limited | Construction | 2002 |
| David Alexander Jewellery Limited | Manufacturing | 2026 |
| David Baird Limited | Information & communication | 2007 |
| David Baker Flowers Limited | Wholesale & retail | 2008 |
| David Campbell Aviation Consultant Ltd | Professional & scientific | 2023 |
| David Fraser (Physiotherapy) Limited | Health & social care | 2011 |
| David Gibney Associates Ltd | Professional & scientific | 2015 |
| David Hardisty Limited | Administrative & support | 2013 |
| David Huddlestone Consulting Limited | Wholesale & retail | 2021 |
| David J Long Limited | Construction | 2003 |
| David LEE Surveying Services Limited | Professional & scientific | 2016 |
| David Lloyd & Co. Riflemakers Limited | Manufacturing | 2004 |
| David Michael Peters Limited | Extraterritorial | 2023 |
| David Monk Environmental Ltd | Professional & scientific | 2023 |
| Davidsons Electrical Services Ltd | Construction | 2023 |
| Davies & Co. Holdings Ltd | Construction | 2025 |
| Davies and Patel Limited | Health & social care | 2022 |
| Dawidh Ltd | Wholesale & retail | 2022 |
| DB Accountancy Ltd | Professional & scientific | 2009 |
| DB Cars Executive Private Hire Limited | Transport & logistics | 2025 |
| DB Training Services Ltd | Professional & scientific | 2023 |
| DBL Europe Limited | Other services | 2014 |
| DBR Training and Certification Company Limited | Health & social care | 2023 |
| Dccfit Ltd | Arts & recreation | 2025 |
| DCS 23 Ltd | Information & communication | 2007 |
| DD Business Co Ltd. | Transport & logistics | 2020 |
| DE Durant Limited | Health & social care | 2013 |
| Debbies Creative Cakes Ltd | Manufacturing | 2010 |
| Declan LEE Motorsports Limited | Arts & recreation | 2021 |
| Declarative Management Ltd | Professional & scientific | 2017 |
| Decor Dunscombe Ltd | Professional & scientific | 2014 |
| Dedman Lettings Ltd | Real estate | 2017 |
| Dedman Properties Limited | Real estate | 1978 |
| Deep Thought Solutions Limited | Information & communication | 2022 |
| Deer Way (Horsham) RTM Limited | Households | 2020 |