| Diving Academy (Colchester) Limited | Reading | 2025 |
| Diving Academy (Group) Ltd | Reading | 2025 |
| Diving Into Spanish Ltd | London | 2023 |
| Diving Matrix Limited | Poole | 1997 |
| Divitiae Group Ltd | London | 2021 |
| Diwis Creations CIC | Hemel Hempstead | 2022 |
| Dixon Tutoring Limited | Belfast | 2025 |
| Dixons Academies Trust | Bradford | 1988 |
| Dixontech Ltd | London | 2024 |
| Dixytots Limited | Sale | 2021 |
| DIY Academy Ltd | Shrewsbury | 2019 |
| DIY Theatre Community Interest Company | Salford | 2010 |
| Diyaa Quranic Centre Limited | London | 2018 |
| Diypal Ltd | London | 2024 |
| Dizzy Heights Specialist Services Ltd | Stoke-On-Trent | 2023 |
| Dizzy Heights Staffs C.I.C. | Stoke-On-Trent | 2021 |
| Dizzy's Day Nursery Limited | Haverhill | 2013 |
| DJ Clark Tutoring Ltd | Surbiton | 2024 |
| DJ Education Consultants Ltd | Lymington | 2008 |
| DJ Judo Academy Ltd | Guildford | 2024 |
| DJ Mallu Driving School Ltd | Sutton | 2024 |
| DJ Outreach Limited | Coulsdon | 2025 |
| DJ School Leeds C.I.C. | Leeds | 2013 |
| DJ Smart Wellbeing Ltd | Northampton | 2023 |
| DJ Sports Ltd | High Wycombe | 2018 |
| DJ Sports Southampton Ltd | Southampton | 2023 |
| DJ Wood Training Limited | Manchester | 2018 |
| DJ2 Sports Limited | West Kingsdown | 2025 |
| DJ4ADAY CIC | Cwmbran | 2026 |
| DJB Microtech Limited | Greenock | 1985 |
| DJD Training Ltd | Harrogate | 2019 |
| DJE Group Ltd | Billingham | 2017 |
| DJF Educational Consultancy Limited | Preston | 2014 |
| DJG Consultancy & Training Ltd | Liverpool | 2022 |
| DJG Training Services Limited | Ashbourne | 2024 |
| Djki Academy Ltd | Leicester | 2020 |
| DJP Professional Solutions Ltd | Leighton Buzzard | 2023 |
| DJR Consulting Limited | Melton Mowbray | 2026 |
| DJR PGA Ltd | London | 2024 |
| DJR Training Services Ltd | Northampton | 2015 |
| DJS Music Ltd | Banstead | 2012 |
| DJS Training and Consultancy Limited | Sandbach | 2010 |
| DJS Training Ltd | Lincoln | 2026 |
| Djtc Tennis Limited | Lichfield | 2024 |
| DJU Consulting Limited | London | 2024 |
| Djurtus United CIC | Leeds | 2024 |
| Djvo Solutions Ltd | Canterbury | 2023 |
| DJW Education Limited | Market Harborough | 1977 |
| DK & EK Holdings Limited | Rayleigh | 2017 |
| DK Coaching Limited | Eastleigh | 2026 |
| DK Collective CIC | London | 2025 |
| DK Fitness Limited | Berkhamsted | 2014 |
| DK Global Coaching Limited | Wakefield | 2021 |
| DK Global Limited | Wakefield | 2013 |
| DK Jones Global Enterprises Ltd | London | 2025 |
| DK Media & Communication Ltd | Glasgow | 2021 |
| DK Music Business Academy Ltd | Hove | 2021 |
| DK Tuition Ltd | Tunbridge Wells | 2024 |
| Dk&K Services Limited | Greenford | 2016 |
| Dkdcoaching Limited | Luton | 2021 |
| DKF Training & Assessment Providers Limited | Gravesend | 2018 |
| DKL Solutions Limited | Ipswich | 2014 |
| DKM and NET Limited | London | 2017 |
| DKN Gymnastix Ltd | Woodford Green | 2024 |
| DL Sports Ltd | Alton | 2025 |
| DL SSC Limited | Althorne | 2021 |
| DL3 Partners Limited | Darlington | 2026 |
| DLA Driving Learning Academy Ltd | London | 2023 |
| DLA Driving School Ltd | Dunstable | 2020 |
| DLB Education Ltd | London | 2022 |
| DLB Tuition Limited | London | 2020 |
| DLD Educational Consultancy Ltd | London | 2022 |
| Dlda Productions Limited | Runcorn | 2025 |
| DLG Dance School Limited | Preston | 2023 |
| DLM Tutoring Ltd | Solihull | 2024 |
| Dlmt Ltd | Knaresborough | 2016 |
| Dlowcamp CIC | London | 2025 |
| DLS Send Support Solutions Ltd | Sutton Coldfield | 2022 |
| Dlshqg Limited | Abbots Langley | 2025 |
| DLX Performance Ltd | Melrose | 2026 |
| DM Academy Limited | Cardiff | 2021 |
| DM Beauty Training Co Ltd | Glasgow | 2025 |
| DM Clinical and Professional Services Ltd | Watford | 2019 |
| DM Education Services Ltd | Dunfermline | 2025 |
| DM Educational & Training Services Limited | Walsall | 2015 |
| DM Facilitator Ltd | Huddersfield | 2026 |
| DM Global Education Ltd | Barking | 2025 |
| DM Hair & Education Ltd | Leicester | 2023 |
| DM3D Ltd | Manchester | 2022 |
| Dmasterclass.Co.Uk Ltd | Coalville | 2022 |
| Dmat Services Limited | Liverpool | 2018 |
| DMB Academy Ltd | Welwyn Garden City | 2013 |
| DMB Enterprises Ltd | Epsom | 2015 |
| DMC Assessing Limited | Liverpool | 2021 |
| DMC Educational Limited | Shrewsbury | 2025 |
| DMD Training Ltd | London | 2025 |
| Dmfma Limited | Tonbridge | 2008 |
| DMG Food Safety Solutions Ltd | Saltburn-By-The-Sea | 2014 |
| DMG Sports Ltd | Aldershot | 2025 |
| DMH Training Limited | Inverness | 2009 |