| Cheap Jacks Limited | Wholesale & retail | 2009 |
| Cherrybrook Publishing Limited | Information & communication | 2012 |
| Chevron Commercial Cleaning Limited | Administrative & support | 2012 |
| CK Land Limited | Construction | 2024 |
| Clarke-Cardew & Co Limited | Administrative & support | 2012 |
| Cleancove Ltd | Other services | 2026 |
| Cloude 9 Customs Limited | Other services | 2020 |
| CNJ Automotive Ltd | Wholesale & retail | 2023 |
| Coach House (Romney) Limited | Hospitality | 2020 |
| Coast Promotions Limited | Wholesale & retail | 2006 |
| Coastal Heating & Plumbing (Kent) Limited | Construction | 2003 |
| Coastguard Wash-House Limited | Real estate | 2008 |
| Collier Auto Repairs Ltd | Wholesale & retail | 2018 |
| Cora's Property Management Limited | Households | 2026 |
| Corporate Cost Reductions Limited | Information & communication | 1998 |
| Cotterall Investments Limited | Financial services | 2012 |
| Counter Active Ltd | Other services | 2019 |
| County Building Services Limited | Construction | 2009 |
| Coxheath Chiropractic Ltd | Health & social care | 2012 |
| CPS 365 Ltd | Real estate | 2004 |
| Crown Construction SE Ltd | Construction | 2022 |
| Crypto Construction and Renovation Ltd | Construction | 2018 |
| Cuttools Ltd | Wholesale & retail | 2025 |
| CW Kent Construction Ltd | Agriculture & fishing | 2020 |
| CW Kent Construction PA Ltd | Professional & scientific | 2025 |
| Cyprus Fish Bar Ltd | Hospitality | 2019 |
| D J Knight Building Services Ltd | Construction | 2025 |
| D Perrins Services Ltd | Administrative & support | 2026 |
| D. Stanley & Sons Ltd | Professional & scientific | 2025 |
| D.C.W. Penrose & Company Limited | Manufacturing | 1957 |
| D1 Steel Services Ltd | Construction | 2020 |
| Darke Steel Limited | Manufacturing | 1964 |
| Data Connected Ltd | Professional & scientific | 2019 |
| David Jowett Business Solutions Limited | Professional & scientific | 2020 |
| DC Landscape Creations Limited | Administrative & support | 2016 |
| Dearman Bartlett Independent Funeral Directors Ltd | Other services | 2025 |
| DF Builders (Kent) Ltd | Construction | 2023 |
| Digital Savvy Media Limited | Information & communication | 2023 |
| Discount Tyres New Romney Ltd | Wholesale & retail | 2019 |
| DK Catering Ltd | Hospitality | 2025 |
| DL Property Works Ltd | Households | 2025 |
| DLB Services (Cornwall) Limited | Construction | 2017 |
| DLS Advisory Limited | Professional & scientific | 2026 |
| DLS Transport Logistics Limited | Transport & logistics | 2018 |
| DM Logistics Services Ltd | Transport & logistics | 2021 |
| Dobster Services Ltd | Administrative & support | 2007 |
| DPF & Mapping Ltd | Administrative & support | 2025 |
| DPO and Data Solutions Ltd | Information & communication | 2025 |
| Dragon Spirit Worldwide Ltd | Education | 2018 |
| Drive Autocentre Limited | Wholesale & retail | 2023 |
| Drive Automotive & Leisure Limited | Wholesale & retail | 2010 |
| Drone Inspect Services Ltd | Professional & scientific | 2019 |
| Drop N Go Food Service Limited | Hospitality | 2020 |
| Dryvale (UK) Ltd | Construction | 2013 |
| DT Electrical and Building Services Ltd | Other services | 2017 |
| Dunes Grill Ltd | Hospitality | 2019 |
| Dunhill Inspection & Testing Limited | Professional & scientific | 2016 |
| Dunne & Dunne Services Ltd | Administrative & support | 2023 |
| Dura Medical Ltd | Health & social care | 2023 |
| Dwld Anaesthesia Limited | Health & social care | 2010 |
| E E (Holdings) Limited | Professional & scientific | 2011 |
| E N Tooling Ltd | Wholesale & retail | 2017 |
| E. Prior & SON Ltd | Water & waste | 2023 |
| E5 Bookkeeping Ltd | Professional & scientific | 2020 |
| Eagle Aero Engineering Limited | Administrative & support | 2009 |
| Eakers Catering Limited | Hospitality | 2023 |
| Earbsa Strategic Ltd | Information & communication | 2024 |
| Earthquake Nutrition Ltd | Wholesale & retail | 2026 |
| East Kent Leaflet Distribution Limited | Professional & scientific | 2019 |
| EAV Group Limited | Construction | 2014 |
| EAV Park NET Limited | Information & communication | 2025 |
| Eazybait Ltd | Wholesale & retail | 2019 |
| Ecoheat PH Limited | Construction | 2015 |
| Econ Polyurethanes Limited | Construction | 2016 |
| Edgar Property Maintenance Limited | Construction | 2023 |
| Efendi Brentwood DRY Cleaners Ltd | Other services | 2012 |
| Efficient & Dynamic Solutions Limited | Information & communication | 2012 |
| EGG Investments Limited | Hospitality | 2015 |
| Electrip Ltd | Manufacturing | 2021 |
| Elite Site Supplies Limited | Construction | 2011 |
| Elliot Street Events Limited | Professional & scientific | 2024 |
| Elongate Limited | Professional & scientific | 2011 |
| Embrake Management Limited | Real estate | 1999 |
| Enviromech Ltd | Construction | 2016 |
| Erskine Care Services Ltd | Health & social care | 2011 |
| Esciam Limited | Administrative & support | 2018 |
| Essential Supplementary Medical Insurance Limited | Administrative & support | 2012 |
| ETL Earnings Index Ltd | Information & communication | 2024 |
| ETL Employment Index Ltd | Information & communication | 2024 |
| Euro Erosion Engineering Limited | Construction | 2002 |
| Evoconsult Ltd | Construction | 2024 |
| Evoke Events Limited | Administrative & support | 2016 |
| Evolve Gym 2 Limited | Arts & recreation | 2009 |
| F & S Maintenance Limited | Administrative & support | 2013 |
| Famescott Investments Limited | Financial services | 2011 |
| Farley Consultancy Services Limited | Information & communication | 1991 |
| Farmhouse Pizzas ORG (UK) Ltd | Hospitality | 2016 |
| FAT Girl Foods Ltd | Hospitality | 2020 |
| Feel Great Radio Ltd | Information & communication | 2019 |
| Ffiats Ltd | Information & communication | 2016 |