| Dafi Tiles Floring Ltd | Real estate | 2024 |
| Daily Grind Designs Ltd | Wholesale & retail | 2024 |
| Daizu Sushi Bar Ltd | Hospitality | 2022 |
| Dallas Brett Ltd | Real estate | 2026 |
| Dallas Brett Mortgages (UK) Ltd | Professional & scientific | 2023 |
| Damian F Weilers Ltd | Information & communication | 2019 |
| Damien Guest Limited | Real estate | 2019 |
| Dan's Desk Ltd | Arts & recreation | 2012 |
| Danae Consultancy Ltd | Professional & scientific | 2025 |
| Dandt Living Care Services Ltd | Health & social care | 2025 |
| Daniel Fosbery Studio Limited | Manufacturing | 2017 |
| Daniel James Coaching Ltd | Arts & recreation | 2025 |
| Daniel Pemberton Limited | Information & communication | 2024 |
| Daniela Bultoc Consultancy Ltd | Professional & scientific | 2023 |
| Danielle Landau Ltd | Health & social care | 2022 |
| Dans Pokestop Ltd | Wholesale & retail | 2025 |
| Daows Thai Kitchen Ltd | Hospitality | 2020 |
| Darren William Beale Ltd | Extraterritorial | 2024 |
| Darren-James.Group Ltd | Transport & logistics | 2025 |
| Data Folks Ltd | Information & communication | 2025 |
| Data Intelligence Consulting Ltd | Information & communication | 2024 |
| Dave Parker Services Limited | Transport & logistics | 2000 |
| David Hamilton Boyd Events Limited | Hospitality | 2017 |
| David Slack & Co Limited | Extraterritorial | 2014 |
| DB Carpentry Services Ltd | Manufacturing | 2023 |
| DB Post Ltd | Information & communication | 2024 |
| DB Project Management Services Ltd | Construction | 2004 |
| DB4.0 Ltd | Professional & scientific | 2025 |
| DBB (PS) Limited | Construction | 2019 |
| DC Edited Limited | Professional & scientific | 2021 |
| DCL Project Services Ltd | Professional & scientific | 2017 |
| Dclm Ltd | Administrative & support | 2012 |
| DDA Kent Limited | Hospitality | 2017 |
| DE Jong Packaging Ltd. | Administrative & support | 2012 |
| Deal GAS Limited | Construction | 2012 |
| Deansdale Property Development Co. Limited | Real estate | 1964 |
| Deansdale Property Ventures Limited | Real estate | 2026 |
| Declutter Kent Ltd | Other services | 2025 |
| Deco Original Limited | Wholesale & retail | 2011 |
| Defence Cases UK Ltd | Manufacturing | 2014 |
| Defensible Ballistics Ltd | Professional & scientific | 2013 |
| Deka Design Ltd | Manufacturing | 2018 |
| Delta Consultancy Services Limited | Professional & scientific | 2003 |
| Dementia Experts Ltd | Professional & scientific | 2024 |
| Demirbusiness Ltd | Wholesale & retail | 2026 |
| Demon Speed Motorsports Limited | Manufacturing | 2022 |
| Dennis Way (Freehold) Limited | Households | 2021 |
| Dent Direct Ltd. | Wholesale & retail | 2003 |
| Deny&Fab Ltd | Hospitality | 2023 |
| Dersah Limited | Wholesale & retail | 2025 |
| Destrier Capital Limited | Manufacturing | 2004 |
| Detailmost Trading Limited | Wholesale & retail | 1993 |
| Deux Iles Limited | Arts & recreation | 2015 |
| Deville Creations Ltd | Professional & scientific | 2014 |
| Diamond Cafe Limited | Hospitality | 2010 |
| Diamond Hospitality Holdings Ltd | Financial services | 2026 |
| Diamond Pet Travel Ltd | Transport & logistics | 2026 |
| Digestive Botanicals Ltd | Manufacturing | 2025 |
| Digital Automation Limited | Manufacturing | 2017 |
| Digital Energy Innovation Ltd | Information & communication | 2025 |
| Digital Gateway 24 Limited | Arts & recreation | 2014 |
| Digital Media Capital Limited | Professional & scientific | 2004 |
| Digital Nachos Ltd | Information & communication | 2017 |
| Digital Securities Limited | Information & communication | 2026 |
| Digital Shovel Limited | Information & communication | 2025 |
| Digitized Ltd | Manufacturing | 2016 |
| Dilayda Catering Ltd | Hospitality | 2026 |
| Dinos Folkestone Limited | Hospitality | 2026 |
| Diplomateninterviews Ltd | Professional & scientific | 2023 |
| Directed by Mario Ltd | Information & communication | 2025 |
| Dirk Seyfried Photography Ltd | Professional & scientific | 2019 |
| Discovury Ltd | Wholesale & retail | 2026 |
| Disruptive Urbanism Limited | Administrative & support | 2013 |
| Divine Dawn Limited | Real estate | 2014 |
| Dixwell House RTM Company Limited | Households | 2021 |
| DIY Soup Ltd | Transport & logistics | 2021 |
| DJ Hart Homes Limited | Real estate | 2022 |
| Djclinic Ltd | Other services | 2025 |
| DN Media Ltd | Arts & recreation | 2025 |
| Dnaofdance Limited | Arts & recreation | 2023 |
| DO Acquisition Limited | Administrative & support | 2016 |
| DO Computer Systems Ltd | Information & communication | 2017 |
| DO YOU Digital Ltd | Administrative & support | 2020 |
| Docker Brew Co Ltd | Manufacturing | 2019 |
| Docker Fermentation Ltd | Manufacturing | 2016 |
| Dolan Associates Ltd | Administrative & support | 2017 |
| Domustar Ltd | Real estate | 2021 |
| Donnybrook Movements Ltd | Real estate | 2014 |
| Dormobile Trading Limited | | 1992 |
| Doug's Maintenance Services Limited | Households | 2008 |
| Douglas Accountancy Limited | Professional & scientific | 2012 |
| Dougles Online Limited | Wholesale & retail | 2013 |
| Dovecote Court Company Limited | Households | 2000 |
| Dover Marina Hotel Holdings Limited | Other services | 2017 |
| Dovern Ltd | Wholesale & retail | 2016 |
| Downs Court Management Limited | Professional & scientific | 1991 |
| DPB Construction Services Ltd | Construction | 2015 |
| DPB Group Limited | Construction | 2015 |
| DPB Leasing Ltd | Administrative & support | 2016 |
| DPH Inc Ltd | Wholesale & retail | 2024 |