| CW Programmes Ltd | Professional & scientific | 2023 |
| Cward and Mcullen Property Ltd | Construction | 2024 |
| CY Bentley Ltd | Real estate | 2020 |
| CY Freeholds Ltd | Real estate | 2017 |
| CY Land Ltd | Construction | 2020 |
| CY Mews Ltd | Real estate | 2021 |
| Cygnet Day Nurseries Ltd | Education | 2002 |
| Cygnets Day Nurseries (Bournemouth) Ltd | Education | 2005 |
| D Attard (UK) Limited | Professional & scientific | 2024 |
| D R Hankin Forestry Ltd | Agriculture & fishing | 2013 |
| D&H Plumbing&Heating Ltd | Construction | 2018 |
| Daisy at the HOP Ltd | Hospitality | 2026 |
| Dakim Limited | Construction | 2006 |
| Dame Care Solutions Ltd | Health & social care | 2022 |
| Damian Hickey Ltd | Information & communication | 2026 |
| Daniel Lawson Johnston Ltd | Arts & recreation | 2013 |
| Danny BOY Productions Limited | Information & communication | 2016 |
| Daran Morris Limited | Wholesale & retail | 2013 |
| Dark Village Limited | Information & communication | 2010 |
| Dart Investments Two Limited | Real estate | 2016 |
| Dashy Balloons Limited | Wholesale & retail | 2026 |
| Dblo Electrical Ltd | Construction | 2015 |
| DCS Landscapes Limited | Administrative & support | 2015 |
| Dean Potter Limited | Construction | 2006 |
| Deathgrip Limited | Information & communication | 2022 |
| DEC Contractors Ltd | Construction | 2026 |
| Deema Ltd | Real estate | 2013 |
| Deep Dynamics Limited | Other services | 2012 |
| Defence Specialist Solutions Limited | Professional & scientific | 2024 |
| Dejamo Ltd | Health & social care | 2023 |
| Denby HR Ltd | Administrative & support | 2025 |
| Denzil Road Guildford (Freehold) Limited | Households | 2009 |
| Dgsa T/A Advantage Safety (UK) Ltd | Professional & scientific | 2016 |
| DH Builders (Hampshire) Ltd | Construction | 2023 |
| Dice Quest Limited | Hospitality | 2016 |
| Digishare UK Ltd | Information & communication | 2009 |
| Diplomat International Limited | Information & communication | 2016 |
| Distinct Services (Freight Networking) Ltd. | Professional & scientific | 2003 |
| DJB Machinery - Midlands Ltd | Wholesale & retail | 2024 |
| DJB Machinery - North Ltd | Wholesale & retail | 2024 |
| DJB Machinery - South East Ltd | Wholesale & retail | 2024 |
| DJB Machinery - South West Ltd | Wholesale & retail | 2024 |
| DK & GP Marshall Ltd | Wholesale & retail | 2020 |
| DKEL93 Ltd | Wholesale & retail | 2020 |
| Dolleymore Limited | Professional & scientific | 2013 |
| Domiciliary Care Consultancy Ltd | Professional & scientific | 2023 |
| Dortanet Limited | Information & communication | 2026 |
| Double Yolk Ltd | Professional & scientific | 2019 |
| Downing Advisory Limited | Professional & scientific | 2026 |
| DP Building Maintenance Limited | Construction | 2024 |
| Dragon V Limited | Hospitality | 2016 |
| Drainworks Ltd | Construction | 2023 |
| Drake Land Developments Ltd | Real estate | 2001 |
| Drake Property Development Ltd | Construction | 2002 |
| Dream Leisure Limited | Wholesale & retail | 2005 |
| Drive Vision Driving School Ltd | Education | 2025 |
| Drone Exterior Solutions Ltd | Administrative & support | 2024 |
| DRY System Roofing Ltd | Construction | 2025 |
| DTM Heating and Plumbing Solutions Ltd | Construction | 2018 |
| Dunamace Ltd | Professional & scientific | 2015 |
| DW Interior Design Ltd | Professional & scientific | 2021 |
| Dwj-Sonconstructionandroofing Ltd | Construction | 2025 |
| Dxten Limited | Real estate | 2006 |
| Dynamic Air Solutions Ltd | Manufacturing | 2018 |
| Dyslexia Support Consultancy Ltd | Education | 2016 |
| E&P Lettings Ltd | Real estate | 2025 |
| Earthshel Estates Limited | Real estate | 2020 |
| Easyflow Screeds Ltd | Construction | 2024 |
| Easyvision Consultancy Ltd. | Information & communication | 2018 |
| Eco Nova Solutions Ltd | Wholesale & retail | 2025 |
| Edge Cargo UK Ltd | Transport & logistics | 2023 |
| Edissero Limited | Administrative & support | 2003 |
| EGS (International) Limited | Administrative & support | 1999 |
| Ehqa Services Ltd | Professional & scientific | 2024 |
| Electric Radiant Heating Systems Ltd | Construction | 2017 |
| Electronic Media Services Limited | Manufacturing | 1999 |
| Elevator Digital Limited | Information & communication | 2016 |
| Elkem Silicones (UK) Ltd | Manufacturing | 2006 |
| Elliott and Elliott Property Limited | Real estate | 2024 |
| EM Munro Ltd | Other services | 2024 |
| Emerge Advisory Limited | Professional & scientific | 2025 |
| Energy Manage (Community) CIC | Education | 2023 |
| Energy Saving Controls Limited | Manufacturing | 2019 |
| Energypak Limited | Wholesale & retail | 2020 |
| Enfranchise 272 Limited | Professional & scientific | 1998 |
| Enfranchise 273 Limited | Professional & scientific | 1998 |
| Engineering Safety Ltd | Professional & scientific | 2019 |
| Enigma Lighting Limited | Extraterritorial | 2000 |
| Entrepreneurial Trading Company Services Limited | Extraterritorial | 1994 |
| Epopshop Trend Limited | Wholesale & retail | 2023 |
| Epsm Ltd | Construction | 2018 |
| Equine Aqua Power Ltd | Agriculture & fishing | 2020 |
| Equistar Procurement Services Limited | Administrative & support | 2024 |
| Ernee Limited | Financial services | 2021 |
| Esccon Ltd | Professional & scientific | 2015 |
| Esdevium Games Limited | Wholesale & retail | 1995 |
| ESS Ventilation LLP | | 2007 |
| Eswa Limited | Construction | 1959 |
| Ethrob Groundworks & Civil Engeneering Ltd | Construction | 2023 |
| Ethrob Services Ltd | Administrative & support | 2020 |