| Construction Express Limited | Construction | 2010 |
| Cooling System Consultations Limited | Professional & scientific | 2012 |
| Copper Cube Developments Ltd | Real estate | 2018 |
| County Insurance Brokers Limited | Financial services | 2012 |
| Cowie Construction Ltd | Construction | 2004 |
| Crafty Critters Club Limited | Administrative & support | 2017 |
| Creative Nails Surrey Limited | Other services | 2019 |
| Crestnova Limited | Real estate | 2002 |
| Crimsonred Ltd | Real estate | 2020 |
| Crown Air Conditioning Limited | Construction | 2007 |
| Crown Pioneer Air Conditioning Limited | Construction | 2019 |
| Crusoe Contemporary Ltd | Wholesale & retail | 2020 |
| CSA Advisory Ltd | Professional & scientific | 2021 |
| CSG Accountancy Limited | Professional & scientific | 2024 |
| Cspp Property Limited | Real estate | 2025 |
| CSQ Marketing Limited | Information & communication | 1998 |
| Cubical IT Limited | Information & communication | 2016 |
| Cuddington Park Management Company Limited | Other services | 1996 |
| Cuff & Gough LLP | | 2007 |
| Cumco Ltd | Hospitality | 2025 |
| CVH Joinery Ltd | Construction | 2023 |
| Cybernotch Technologies Ltd | Information & communication | 2023 |
| Cybrehl Ltd | Information & communication | 2020 |
| D H Electrical and Plumbing Services Limited | Construction | 2012 |
| D J Cleaning Services (London) Limited | Administrative & support | 2007 |
| D. Miles Electrical Services Limited | Construction | 2019 |
| D.Cousins Fireplace and Stove Specialists Ltd | Construction | 2016 |
| Dancja Ltd | Professional & scientific | 2022 |
| Dante Active Limited | Administrative & support | 2023 |
| Dante Group Limited | Financial services | 2023 |
| Dante Management Limited | Arts & recreation | 2023 |
| Dante Ventures Limited | Professional & scientific | 2023 |
| Darren Burns Limited | Construction | 2009 |
| Darshan Limited | Extraterritorial | 2000 |
| Data Services Consultancy Limited | Information & communication | 2014 |
| Davies & Co Consulting Ltd | Professional & scientific | 2022 |
| Dawkins & Company Limited | Real estate | 2014 |
| Dawkins Estate Limited | Real estate | 2001 |
| Dawkins Group Ltd | Extraterritorial | 2023 |
| DC Autoworks Limited | Wholesale & retail | 2017 |
| DC Solutions Europe Limited | Information & communication | 2011 |
| DD Roofing & Construction Ltd | Construction | 2016 |
| DE Burgh House Residents Association Limited | Households | 1973 |
| Dean Partners Limited | Professional & scientific | 2025 |
| Deepsea Engineering Limited | Information & communication | 2011 |
| DEL and Claudi Ltd | Wholesale & retail | 2024 |
| Delphinium Limited | Information & communication | 1995 |
| Denbigh Close (Sutton) Management Company Limited | Households | 2025 |
| Denise Goff Ltd | Administrative & support | 2024 |
| Department X Ltd | Arts & recreation | 2021 |
| Desktop Valuations Ltd | Construction | 2007 |
| DGE Estates Ltd | Real estate | 2024 |
| DH Roofing & Building Limited | Construction | 2020 |
| DH Tree Services Limited | Administrative & support | 2015 |
| Dice Company Productions Limited | Information & communication | 2023 |
| Digital Home Tech Limited | Information & communication | 2023 |
| Disaway Trust(The) | Other services | 1981 |
| Discover Potential Ltd | Education | 2017 |
| Ditto Management Ltd | Administrative & support | 2018 |
| Divergent Learning Limited | Education | 2023 |
| DJG Plumbing and Heating Ltd | Construction | 2023 |
| DJS Music Ltd | Education | 2012 |
| DLD Sales Ltd | Wholesale & retail | 2025 |
| DM Accountancy Limited | Professional & scientific | 2023 |
| DNA Decorating Ltd | Extraterritorial | 2020 |
| Documentor Ltd | Information & communication | 2011 |
| DOE Protection Limited | Administrative & support | 2011 |
| DOH! Ltd | Hospitality | 2019 |
| Double Eight Hospitality Holdco Limited | Financial services | 2021 |
| Double Five Hospitality Franchise Limited | Administrative & support | 2020 |
| Double Five Hospitality Limited | Administrative & support | 2013 |
| Double L Estate Ltd | Real estate | 2024 |
| Double Nine Hospitality Franchise Ltd | Hospitality | 2023 |
| Double Nine Hospitality Holdco Ltd | Financial services | 2020 |
| Double Nine Hospitality Ipco Ltd | Administrative & support | 2020 |
| Double Nine Hospitality Ltd | Hospitality | 2020 |
| Double One Hospitality Franchise Limited | Administrative & support | 2020 |
| Double One Hospitality Holdco Limited | Financial services | 2021 |
| Double One Hospitality IP Limited | Administrative & support | 2020 |
| Double One Hospitality Limited | Hospitality | 2021 |
| Double SIX Hospitality Franchise Ltd | Professional & scientific | 2026 |
| Double SIX Hospitality Hold Co Ltd | Financial services | 2024 |
| Double SIX Hospitality IP Co Ltd | Administrative & support | 2024 |
| Double SIX Hospitality Ltd | Hospitality | 2024 |
| Double Three Hospitality Franchise Ltd | Administrative & support | 2023 |
| Double Three Hospitality Holdco Ltd | Financial services | 2023 |
| Double Three Hospitality Ipco Ltd | Administrative & support | 2023 |
| Double Three Hospitality Ltd | Hospitality | 2023 |
| Downs Mower Services Limited | Wholesale & retail | 1956 |
| DR L H Yeoh Audiological Medicine Limited | Real estate | 2011 |
| DR. Networks Limited | Information & communication | 2003 |
| DR. R a Huddart Ltd | Health & social care | 2006 |
| Drainage Solutions (JP) Limited | Water & waste | 2016 |
| Drakes Investment Ltd | Extraterritorial | 2024 |
| Dream Body Solutions Ltd | Other services | 2019 |
| Dreamz Realty Group Ltd | Real estate | 2026 |
| Dreamztech Solutions Limited | Information & communication | 2005 |
| Drew TV Limited | Information & communication | 2016 |
| Drewitt Engineering Ltd | Construction | 2010 |
| Drews Dwellings Ltd | Real estate | 2021 |