| DEM PT Ltd | London | 2017 |
| Dembs Consult Limited | Croydon | 2017 |
| Demby-Wheeler Limited | Maidenhead | 2018 |
| Demdrones Entertainment Ltd | London | 2025 |
| Dementia Club UK | London | 2015 |
| Dementia Compass Limited | Royston | 2021 |
| Dementia Consultancy Ltd | Letchworth Garden City | 2026 |
| Dementia Educators Limited | London | 2022 |
| Dementia Life CIC | Saffron Walden | 2025 |
| Demetae Academy Group Ltd | London | 2021 |
| Demetae Academy Ltd | London | 2021 |
| Demetae Secondary Ltd | Newcastle | 2026 |
| Demeter House Limited | North Lincolnshire | 2006 |
| Demetra Paphitis Ltd | London | 2018 |
| Demidov Centre of Acting Studies Ltd | Bolton | 2026 |
| Demirdogmez Ltd | London | 2019 |
| Demisemiquaver Studio Ltd | London | 2016 |
| Demmayoque Services Limited | Erith | 2016 |
| Demmykitties Childcare Services Limited | London | 2010 |
| Democrashe Ltd | | 2009 |
| Democratic Education Consultants Ltd | Manchester | 2015 |
| Demos | London | 1994 |
| Demos Consulting Limited | London | 1991 |
| Demos Global Limited | London | 2022 |
| Demtech Ltd | London | 2016 |
| Demure Educational Services Limited | Salford | 2025 |
| Demystify TI Limited | London | 2022 |
| DEN Education Ltd | Watford | 2025 |
| Dena Studioz CIC | Bilston | 2026 |
| Denbigh PRE School Limited | Luton | 2011 |
| Denbighshire Music Co Operative Ltd | Denbighshire | 2015 |
| Denbighshire Taekwondo Academy Ltd | Prestatyn | 2023 |
| Dench Psychology Ltd | Bedford | 2026 |
| Dende Collective | London | 2004 |
| Dendritic Ltd | Salisbury | 2018 |
| Denefield Nursery | Reading | 2011 |
| Denefield School | Reading | 2011 |
| Denefield School Development Trust Co Limited | Reading | 1996 |
| Denham Coaching Limited | Lichfield | 2023 |
| Denham Marcus Consulting Limited | London | 2018 |
| Denham Woodlands Nursery School Ltd | Amersham | 2012 |
| Denham-Vaughan Associates Limited | St. Ives | 2008 |
| Denis Lang Ltd | Birmingham | 2025 |
| Denise Eleto's School of Performing Arts Ltd | Dagenham | 2025 |
| Denise Fountain Limited | Birmingham | 2024 |
| Denise Martin Guiding Ltd | Forres | 2024 |
| Denison Britton Williams Limited | Colyton | 2002 |
| Deniz Tuition Limited | London | 2025 |
| Denken Knowledge Limited | Sale | 2024 |
| Denmark Road High School | Gloucester | 2011 |
| Dennis & Dyer Boxing Academy Ltd | Borehamwood | 2019 |
| Dennis-Academy Limited | London | 2025 |
| Dennish Limited | Teddington | 2026 |
| Denny Global Professions Education College Limited | Potters Bar | 2023 |
| Denova Education Limited | London | 2023 |
| Denprep Limited | Oswestry | 2026 |
| Dens, Daisies & Discoveries CIC | Carlisle | 2024 |
| Denstone College Enterprises Limited | Staffordshire | 2004 |
| Denstone College Limited | Staffordshire | 2004 |
| Dent - Training, Education and Development Limited | Swadlincote | 2008 |
| Dent Decoded Ltd | Heckmondwike | 2026 |
| Dent Futures Limited | Manchester | 2024 |
| Dent Mind Ltd | Beaconsfield | 2023 |
| Denta Premier Ltd | Harrow | 2013 |
| Dentabox Limited | Woking | 2024 |
| Dentabyte Ltd | London | 2011 |
| Dentac Ltd | Borehamwood | 2013 |
| Dentacation Ltd | Norwich | 2020 |
| Dental Advisor Limited | Stourbridge | 2020 |
| Dental and Maxillofacial Radiology Academy Limited | Hailsham | 2021 |
| Dental Arch Nurse Training Limited | Winchester | 2013 |
| Dental Careers Guide Ltd | Bradford | 2019 |
| Dental CPD Network Ltd | Pudsey | 2026 |
| Dental Education Lead Limited | Burton-On-Trent | 2022 |
| Dental Education Limited | | 2002 |
| Dental Excel Limited | Hove | 2020 |
| Dental Excellence Academy UK Limited | Liverpool | 2018 |
| Dental Implant Education Limited | Grimsby | 2022 |
| Dental Mastery Ltd | London | 2013 |
| Dental Nurse Network Limited | Hove | 2012 |
| Dental Nurse Training Ltd | Tiverton | 2019 |
| Dental Nurse Training Solutions Limited | Maidenhead | 2025 |
| Dental Pods Academy Ltd | Peterborough | 2020 |
| Dental Professional Education Ltd. | Stourbridge | 2017 |
| Dental Reboot Academy Ltd. | London | 2024 |
| Dental Seminars Ltd | | 2005 |
| Dental Team Qualifications Limited | Leamington Spa | 2012 |
| Dental Training Academy Limited | Wembley | 2021 |
| Dental Training Consultants Ltd | Wembley | 2014 |
| Dental Training Limited | Basingstoke | 2012 |
| Dental Tutors Limited | London | 2018 |
| Dentaljuce CPD Providers Limited | Birmingham | 2010 |
| Dented Limited | Glasgow | 2025 |
| Dentify Education Limited | Oxford | 2019 |
| Dentika Training Academy Ltd | Swindon | 2024 |
| Dentilearn Ltd | Weston-Super-Mare | 2026 |
| Dention Limited | Salford | 2025 |
| Dentocandy Ltd | Gateshead | 2025 |
| Dentography Ltd | Birmingham | 2016 |
| Denton Daycare Ltd | Manchester | 2024 |