| CMC Property Group Ltd | Real estate | 2023 |
| CNO Property Ltd | Real estate | 2025 |
| Cocoflo Ltd | Wholesale & retail | 2020 |
| Coding for Sail Limited | Information & communication | 2015 |
| College Stores Ltd | Wholesale & retail | 2015 |
| Collins-Kittoe Consulting Ltd | Wholesale & retail | 2016 |
| Combi Services (Heating) Limited | Construction | 1983 |
| Compass Fire Protection Limited | Manufacturing | 2015 |
| Complete Construction Systems Limited | Construction | 2026 |
| Construction Health & Safety Ltd | Construction | 2015 |
| Continuityhub Ltd | Information & communication | 2025 |
| Copperzero Ltd | Information & communication | 2021 |
| Cornerhouse LX Limited | Real estate | 2021 |
| Cornerstone Search Ltd | Administrative & support | 2026 |
| County Business Limited | Information & communication | 2020 |
| Cplan Properties Limited | Real estate | 2016 |
| Cplan Solutions Limited | Information & communication | 2012 |
| Cranleigh Construction Waste and Cleaning Ltd | Construction | 2021 |
| Creative ME Ltd | Arts & recreation | 2022 |
| Credit Careers Limited | Administrative & support | 2002 |
| Credit Today Limited | Information & communication | 1999 |
| Croft Management Company Limited(The) | Other services | 1966 |
| Crown Hill Garden Centre Limited | Real estate | 2016 |
| CTP Overseas Training Consultancy Ltd | Education | 2025 |
| CTP Training Academy Witham Ltd | Education | 2016 |
| Cubwear Clothing Ltd | Wholesale & retail | 2020 |
| Cukur BBQ Ltd | Hospitality | 2019 |
| Cupsncrums Ltd | Hospitality | 2025 |
| Curious Consultancy Limited | Administrative & support | 2015 |
| CVM Building Solutions Ltd | Construction | 2025 |
| D Gibbs Home Renovations Limited | Construction | 2026 |
| D J Carroll Roofing Limited | Construction | 2019 |
| D M (Essex) Motors Ltd | Wholesale & retail | 2025 |
| D&G Tiling Ltd | Administrative & support | 2019 |
| D.A.M.S Credit Consulting Limited | Financial services | 2026 |
| DAD Jobs Ltd | Other services | 2026 |
| Dad’S BBQ Ltd | Hospitality | 2025 |
| Danso Construction Limited | Construction | 2017 |
| Darcy's House Limited | Other services | 2023 |
| Daron Ltd | Transport & logistics | 2011 |
| Ddmb Global Concept Ltd | Extraterritorial | 2020 |
| Deanna&Fiona Limited | Health & social care | 2022 |
| Dear Rain Limited | Information & communication | 2022 |
| DEB Surveying Services Limited | Construction | 2019 |
| Decadent Lighting Ltd | Wholesale & retail | 2020 |
| Decor by K&M Ltd | Professional & scientific | 2026 |
| Della Foods Ltd | Wholesale & retail | 2007 |
| Deltatek Limited | Extraterritorial | 2020 |
| Denard Finance Limited | Financial services | 1967 |
| Detailed Building Solutions Limited | Construction | 2021 |
| Developing Futures 2 Limited | Construction | 2025 |
| DGC Property Investment Ltd | Real estate | 2021 |
| DGS Ductwork Limited | Construction | 2018 |
| Digischool Ltd | Education | 2022 |
| Digixentra Ltd | Information & communication | 2026 |
| Divine Memorials Ltd | Wholesale & retail | 2020 |
| Djsr Holdings Ltd | Financial services | 2025 |
| DLP Derivatives LLP | | 2010 |
| DMD Catering Services Limited | Hospitality | 2021 |
| DO IT With Desire Ltd | Information & communication | 2012 |
| Docknet Ltd | Information & communication | 2024 |
| Document Imaging Services Limited | Professional & scientific | 2003 |
| Doomas Ltd | Real estate | 2019 |
| Dormon Laboratories Limited | Health & social care | 2005 |
| Douglas Creative Limited | Professional & scientific | 2020 |
| DPB Property Holdings Limited | Real estate | 2026 |
| DR Celebi Dermatology Ltd | Health & social care | 2025 |
| Drabbey Acute Medical Services Ltd | Health & social care | 2009 |
| Drivepass Pro UK Ltd | Extraterritorial | 2026 |
| Drum Installations Ltd | Wholesale & retail | 2013 |
| Dru’S Homes Ltd | Real estate | 2021 |
| Duke Electrical Contractors Ltd | Construction | 2026 |
| DVC Ventures Ltd | Information & communication | 2026 |
| DVN Solution Limited | Construction | 2021 |
| E & H Limited | Financial services | 2005 |
| E and L Foods Ltd | Hospitality | 2026 |
| E C Millerd Holdings Ltd | Financial services | 2025 |
| E V Lockwood Ltd | Information & communication | 2025 |
| E1VN Ltd | Arts & recreation | 2024 |
| Easy UK World Ltd | Wholesale & retail | 2020 |
| Eaton Gardens (Broxbourne) Management Company Limited | Real estate | 2019 |
| Eaton Gardens Residents Management Company Limited | Households | 2006 |
| Eaton Place (Broxbourne) Management Company Limited | Households | 2011 |
| Edge Carers Ltd | Health & social care | 2023 |
| Ediz&Co London Ltd | Construction | 2023 |
| Edos IT Infrastructure & Services Limited | Information & communication | 2015 |
| Edwin James Consulting Limited | Real estate | 2014 |
| Eeleven Property Group Ltd | Real estate | 2016 |
| Effe Import & Export Ltd | Wholesale & retail | 2013 |
| EHP Solution Building Ltd | Construction | 2020 |
| Ekon Property Ltd | Real estate | 2017 |
| Elcotrad Limited | Professional & scientific | 2025 |
| Eldan Electrical Limited | Construction | 2020 |
| Elena Feyzi Designs Limited | Arts & recreation | 2020 |
| Elite Ballers Limited | Education | 2021 |
| Elite Exterior Living Limited | Administrative & support | 2021 |
| Elliot Heath Lettings Ltd | Real estate | 2022 |
| Elliot Heath Limited | Real estate | 2016 |
| Elliot Heath Properties Limited | Real estate | 2021 |
| Elohim Universal Ltd | Health & social care | 2015 |