| Dsrugby Ltd | Rugby | 2021 |
| DSS (Digital Smile Solutions) Limited | Glasgow | 2025 |
| DSS Coaching & IT Services Ltd | Bradford | 2020 |
| DSS Radiology Limited | Eastleigh | 2024 |
| DSS Richmond Limited | London | 2017 |
| DSS Wimbledon Limited | Kingston Upon Thames | 2017 |
| Dssdrivingschool Limited | Coventry | 2022 |
| DST Consultancy Ltd | Essex | 2008 |
| DSV Training & Education Services Limited | Birmingham | 2015 |
| DSW Training Ltd | Walsall | 2024 |
| DT Attendance Consultancy Limited | West Bromwich | 2018 |
| DT Coaching Services Limited | Redruth | 2021 |
| DT Courses Ltd | Droitwich | 2022 |
| DT Education Limited | Ferndown | 2025 |
| DT Elite Ltd | Ashton | 2024 |
| DT Elite Scholars Limited | Newcastle Upon Tyne | 2025 |
| DT Franchising Limited | Ferndown | 2018 |
| DT Health and Fitness Coaching Ltd | Birmingham | 2025 |
| DT Learning Ltd | Manchester | 2025 |
| DT Online Ltd | Burton-On-Trent | 2024 |
| DT Psychology Ltd | London | 2024 |
| DT Resources Limited | Bury | 2015 |
| Dt&A Ltd | Leicester | 2023 |
| DTC Education Ltd | Tenterden | 2023 |
| DTC Mentorship Limited | Strabane | 2024 |
| DTC Services North East Ltd | Wingate | 2018 |
| DTD Training Limited | Cardiff | 2005 |
| DTE Community Creators CIC | Dagenham | 2025 |
| DTE Consulting Limited | London | 2021 |
| Dte-Elite Ltd | Callington | 2022 |
| Dtedu Ltd | Warrington | 2022 |
| Dtfc 1886 Ltd | Daventry | 2018 |
| DTG Professional Services Limited | Wigan | 2022 |
| Dth-Autism&Me CIC | London | 2023 |
| DTI Training Ltd | Bury St. Edmunds | 2018 |
| DTK CIC | Leicester | 2024 |
| DTL School of Motoring Ltd | Willenhall | 2025 |
| Dtmk Limited | Leighton Buzzard | 2024 |
| Dtnah Limited | Stockton On Tees | 2019 |
| DTO Performance Limited | Silverstone | 2019 |
| DTP Educational Consultants Ltd | Southend-On-Sea | 2026 |
| DTR Enterprises Ltd | Mildenhall | 2024 |
| Dtsconnections Ltd | Stroud | 2026 |
| Dtsom Ltd | Maidenhead | 2025 |
| DTW Education Ltd | Billingham | 2022 |
| DUA for Education (DFE) Ltd | Wolverhampton | 2019 |
| DUA Group Association CIC | Sidcup | 2023 |
| DUA Relief UK Ltd | London | 2025 |
| Duaa Driving Academy Limited | London | 2024 |
| Duaconnect Ltd | Manchester | 2026 |
| Duage Consults Ltd | Gravesend | 2024 |
| Dual Hemisphere Training Limited | Woking | 2012 |
| Dual Motion Limited | Pilgrim'S Hatch | 2025 |
| Dual Strength Coaching Ltd | Yeovil | 2026 |
| Dualversity Ltd | Sheffield | 2018 |
| Duane Plant Training Ltd | Newmarket | 2011 |
| DUB School London Ltd | Greenford | 2025 |
| Dubafrique Community Drummers and Dancers C.I.C. | Chelmsford | 2025 |
| Dubai Watch Ltd | London | 2025 |
| Duber Service Ltd | Manchester | 2025 |
| Ducere Global Business School UK Limited | Cheltenham | 2018 |
| Duchal Nursery School | Kilmacolm | 2005 |
| Ducietraining Ltd | Ulverston | 2025 |
| Duck Down Under Expedition Ltd | London | 2013 |
| Duck N Dive Ltd | Telford | 2016 |
| Duck Sauce Games CIC | Glasgow | 2024 |
| Duckegg Theatre Acting School Limited | Hessle | 2023 |
| Ducklings Childcare (Godmanchester) Ltd. | Derby | 2010 |
| Ducklings Day Nurseries Limited | Lancashire | 2007 |
| Ducklings Limited | Preston | 2003 |
| Ducklings Nursery Ltd | Nottingham | 2023 |
| Ducklings Pre-School Limited | Southampton | 2010 |
| Ducklings Private Nursery Ltd | Nottingham | 2018 |
| Duckpool Pre-School CIC | Whickham | 2010 |
| Duckworth Coaching Ltd | Bedford | 2024 |
| Duckworth Psychology Ltd | Crosby | 2018 |
| Ductus Education Ltd | London | 2026 |
| Dudes & Divas the Village C.I.C. | Newtownabbey | 2026 |
| Dudley Academies Trust | Dudley | 2017 |
| Dudley College Enterprises Limited | W.Mids | 1993 |
| Dudley Education and Co Limited | Manchester | 2018 |
| Dudley Education Services Ltd | Dudley | 2024 |
| Dudley Gymnastics Club CIC | Dudley | 2019 |
| Dudley Learning Centre Ltd | Dudley | 2016 |
| Dudley School Sport Partnership CIC | Stourbridge | 2025 |
| Dudu Footy CIC | London | 2024 |
| Dudwell School Ltd | Radstock | 2011 |
| DUE Action Limited | Middlesbrough | 2015 |
| DUE North Foundation Limited | Coleraine | 2026 |
| Dues Paid Performance Ltd | Ilford | 2025 |
| Duet Dance Limited | Croydon | 2015 |
| Duet Diabetes Limited | Cambridge | 2017 |
| Duffy & Co Consultancy Limited | Sywell | 2020 |
| Duffy Boxing Limited | London | 2022 |
| Dugan Dance Academy Highland Dancing School Ltd | Loanhead | 2025 |
| Dugsy Tuition Centre Limited | Leicester | 2025 |
| Duguid Ltd | Rushden | 2019 |
| Duisen Music School Limited | London | 2025 |
| Duke Corporate Education Limited | London | 2001 |
| Duke Grooves Ltd | Bristol | 2021 |