| Creative Space Kent Ltd | Other services | 2021 |
| Creekside Construction Limited | Manufacturing | 2016 |
| Creekside Tyres Ltd | Wholesale & retail | 2026 |
| Creng Ltd | Professional & scientific | 2025 |
| Cribworks Ltd | Transport & logistics | 2021 |
| Crockham Farm Oast Ltd | Agriculture & fishing | 2022 |
| Cronin Music Limited | Administrative & support | 2001 |
| Cruisin Thru Ltd | Education | 2023 |
| CS Concierge Ltd | Wholesale & retail | 2024 |
| Csbedford Catering Ltd | Hospitality | 2018 |
| CT4TRAINING Ltd | Other services | 2014 |
| CT5 Pride C.I.C. | Information & communication | 2025 |
| CTN Pro UK Limited | Arts & recreation | 2026 |
| CUT the Cake Films Ltd | Information & communication | 2015 |
| CV Digital Solutions Ltd | Administrative & support | 2009 |
| D & P Financial Services Limited | Financial services | 2005 |
| D C Warren Ltd | Other services | 2019 |
| D&M Carpentry and Joinery Limited | Manufacturing | 2020 |
| D&S Garden Solutions and Groundworks Ltd | Administrative & support | 2024 |
| D. H Technical Services Limited | Information & communication | 1997 |
| D2D Futures Ltd | Information & communication | 2024 |
| DAI Productions Limited | Information & communication | 1998 |
| Daily Contracting Ltd | Agriculture & fishing | 2026 |
| Daisy MAY69 Limited | Other services | 2021 |
| Dale Yeatman Ltd | Manufacturing | 2019 |
| Damian Howkins Architects Limited | Professional & scientific | 2018 |
| DAN Patching Creative Design Ltd | Information & communication | 2013 |
| Dane Disability Adaptations Ltd | Wholesale & retail | 2023 |
| Daniel Pollard Couriers Ltd | Transport & logistics | 2019 |
| Danielsen Property Holdings Limited | Real estate | 2025 |
| Danny Eldred Limited | Construction | 2013 |
| Darling YES Ltd | Other services | 2024 |
| Dashata Ltd | Manufacturing | 2026 |
| Dashhounds Ltd | Other services | 2022 |
| Data Bridge (UK) Limited | Information & communication | 2011 |
| Datum Brick & Groundworks Limited | Construction | 2019 |
| David Broder Limited | Information & communication | 2013 |
| Davies Financial Planning Limited | Administrative & support | 2009 |
| Davis GAS Services Limited | Construction | 2014 |
| DE Burca Enterprise Ltd | Health & social care | 2024 |
| Decade Properties Ltd | Real estate | 2011 |
| Deep Healthcare Ltd | Wholesale & retail | 2025 |
| Deers Leap Park Limited | Real estate | 2025 |
| Delderfield Sign Services Ltd | Professional & scientific | 2025 |
| Delfys Systems Ltd | Professional & scientific | 2015 |
| Design & Printing Solutions Limited | Administrative & support | 2009 |
| Design Flooring Co (Kent) Ltd | Construction | 2009 |
| Designer BED Co Limited | Wholesale & retail | 1998 |
| Designer to Travel Ltd | Real estate | 2017 |
| Dgus Group Ltd | Construction | 2024 |
| DIG Worldwide Limited | Administrative & support | 2011 |
| Diode Tech Limited | Wholesale & retail | 2023 |
| Direct Building Services (Kent) Limited | Construction | 2011 |
| Direction Home (Law) LLP | | 2008 |
| Discount Tyres (South East) Ltd | Wholesale & retail | 2019 |
| Discovering Coffee Limited | Hospitality | 2024 |
| Discovering Destinations Ltd | Administrative & support | 2025 |
| Ditton Place Residents Association Limited | Households | 1987 |
| DJ Iain Baker Limited | Information & communication | 2014 |
| DJ Investments Limited | Real estate | 2011 |
| DK Properties (UK) Limited | Administrative & support | 2003 |
| DL Retainer Services Limited | Arts & recreation | 2015 |
| DLM Rigging Ltd | Construction | 2007 |
| DNA Hospitality London Ltd | Hospitality | 2024 |
| Dolphin Court 110 Central Parade Nominee Company Limited | Real estate | 2022 |
| Domestic Property Surveys Ltd | Professional & scientific | 2017 |
| DOT Kids Ltd | Education | 2018 |
| Dot.Tv Productions Limited | Information & communication | 2009 |
| Double Bubble Films Ltd | Information & communication | 2023 |
| Double Nugget Ltd | Information & communication | 2025 |
| Dpattenden Building Services Limited | Construction | 2017 |
| Drawn and Quartered Tattoo and Piercing Ltd | Other services | 2023 |
| Dream Lash Co Limited | Other services | 2025 |
| Drift Bistro Ltd | Hospitality | 2026 |
| Driftwood Trading Tankerton Limited | Administrative & support | 2017 |
| Drj-Rail-Services- Ltd | Professional & scientific | 2019 |
| DRL Capital Ltd | Financial services | 2023 |
| Drop Bear Kitchen Limited | Hospitality | 2019 |
| DS Installations (UK) Limited | Administrative & support | 2008 |
| DT Facial Surgeon Ltd | Health & social care | 2023 |
| DT Services (South East) Ltd. | Water & waste | 2012 |
| Dttj Limited | Professional & scientific | 2021 |
| Dukeswood Management Company Limited | Households | 1989 |
| Dunk Cookies Ltd | Manufacturing | 2020 |
| Dunraven Design Ltd | Arts & recreation | 2014 |
| Duplex Cleaning Machines (U.K.) Limited | Wholesale & retail | 1987 |
| Duravac Products Limited | Manufacturing | 1993 |
| Durovernum Fire Services Limited | Professional & scientific | 2012 |
| Durrants Fine Wines Limited | Wholesale & retail | 2005 |
| Dwellbeinglife Ltd | Professional & scientific | 2025 |
| E K Communications Limited | Professional & scientific | 2003 |
| E-Lectrix Installations Limited | Construction | 2020 |
| E.Revell & Sons Limited | Manufacturing | 1935 |
| EA Cartwright Services Limited | Professional & scientific | 2024 |
| Earlsloan Limited | Administrative & support | 2006 |
| East Kent Civil Works Ltd | Construction | 2025 |
| East Kent Provincial Nominees Limited | Professional & scientific | 2014 |
| East Kent Spatial Development Company | Construction | 2002 |
| East Kent Stoves Limited | Administrative & support | 2014 |
| Eazy-Tan Limited | Other services | 2005 |