| DOT Kids Ltd | Whitstable | 2018 |
| DOT Micro Training Academy Ltd | Newtownabbey | 2024 |
| DOT Plays Piano Ltd | Launceston | 2025 |
| DOT Sign Language Limited | Godalming | 2010 |
| DOT to DOT Psychology Ltd | Witney | 2025 |
| DOT to DOT Studio Limited | East Hoathly | 2022 |
| DOT Training Limited | Haverhill | 2018 |
| Dotbooster Ltd | London | 2023 |
| Doted EYS Limited | Poole | 2023 |
| Dothework Academy Ltd | Preston | 2024 |
| Dotraining and Performance Ltd | London | 2019 |
| Dots & Tots Day Nursery Ltd | Spratton | 2025 |
| Dots Education Ltd | Rugby | 2024 |
| Dottie Dances Ltd | Middlewich | 2025 |
| Dottie Tots Limited | Petersfield | 2016 |
| Douaa Academy Ltd | London | 2025 |
| Double a Limited | Woodford Green | 2016 |
| Double Ducks Nursery Limited | London | 2013 |
| Double UP Education CIC | London | 2022 |
| Doubledeutsch.Com Limited | | 2006 |
| Doublen INT Ltd | Ruislip | 2010 |
| Doublenine One Limited | Doncaster | 2023 |
| Doublestar System Ltd | London | 2022 |
| Douce France London Ltd | London | 2022 |
| Doug Chapman Piano Services Limited | Sidcup | 2014 |
| Doug Green: Educational Consultant Limited | Newcastle Upon Tyne | 2003 |
| Doug Williamson Ltd | Cambridge | 2008 |
| Dougie Gibbons Driving Ltd | Strathaven | 2019 |
| Dougie Hondo Cricket Limited | Ipswich | 2023 |
| Douglas Business School Limited | Bedford | 2020 |
| Douglas Cairns Consultancy Limited | Dundee | 2013 |
| Douglas Flight Training Ltd | Crowthorne | 2014 |
| Douglas J. Noble Limited | | 2003 |
| Douglas Taylor Tutoring Ltd | London | 2023 |
| Douzan Art and Culture C.I.C. | Elland | 2025 |
| Dove Beauty Academy Ltd | Milton Keynes | 2023 |
| Dove Gymnastics Club Ltd | Wickford | 2022 |
| Dove House Community Trust | Derry | 1996 |
| Dove House Hospice Limited | Hull | 1980 |
| Dove Nursery Ltd | Horsham | 2006 |
| Dove Tree Montessori Nursery Limited | Macclesfield | 2023 |
| Dove Workshop Limited | Neath | 1989 |
| Dovecote Education Trust Ltd | Yarm | 2025 |
| Dovecote School Limited | London | 2021 |
| Dovedale Nursery C.I.C. | Chelmsford | 2010 |
| Dovepoint Education Ltd | Wirral | 2024 |
| Dover Driving School Ltd | Dover | 2024 |
| Dovercourt Services Ltd | Chesterfield | 2022 |
| Dovestone Learning Partnership | Oldham | 2017 |
| Dovetail Aviation Limited | Salisbury | 2013 |
| Dovetail Pro Ltd | London | 2024 |
| Dovewell Training Limited | Liverpool | 2017 |
| Dovey Equestrian Limited | Winchester | 2025 |
| Dowbusz Education Ltd | Sheffield | 2019 |
| Dowing Education Ltd | London | 2023 |
| Dowling Ltd | Waterlooville | 2022 |
| Down 2 Earth International | London | 2006 |
| Down at the Cabin Ltd | Colchester | 2017 |
| Down by the Forest Limited | Chorley | 2026 |
| Down in the Woods PRE - School Limited | Poole | 2004 |
| Down the Line Tennis Consultancy Ltd | York | 2019 |
| Down the Woods C.I.C. | Hatfield | 2016 |
| Down to Earth Derby (ED) CIC | Derby | 2022 |
| Down to Earth Foundation | Truro | 2008 |
| Down to Earth Project | Swansea | 2005 |
| Down to Earth Studios Ltd | Littlehampton | 2020 |
| Down to Earth Yoga Ltd | Littlehampton | 2014 |
| Down Tools CIC | Southport | 2020 |
| Down's South London | | 2007 |
| Downe House Foundation | Thatcham | 2014 |
| Downe House International (Oman) Limited | Thatcham | 2019 |
| Downe House International Limited | Thatcham | 2019 |
| Downe House School | Thatcham | 1991 |
| Downes Language Services Limited | London | 2018 |
| Downhall Under Fives C.I.C. | Rayleigh | 2009 |
| Downham Driving School Ltd | Bromley | 2024 |
| Downham Nursery School Limited | Downham Market | 2023 |
| Downham School Limited | Clitheroe | 2011 |
| Downie Driving Services Ltd | Norbury | 2016 |
| Downing Education Group (UK) Limited | London | 2020 |
| Downing Educational Associates Ltd | Dymock | 2010 |
| Downland Dance Limited | Didcot | 2017 |
| Download Education Ltd | Godalming | 2013 |
| Download Learning Ltd | Godalming | 2015 |
| Downright Excellent | London | 2007 |
| Downs School (Charlton House) Limited(The) | Bristol | 1972 |
| Downs School Enterprises Limited | Bristol | 2017 |
| Downs Send Consultancy Ltd | Newhaven | 2021 |
| Downs View Life Skills College | Brighton | 2017 |
| Downside Children`S Pre-School Limited | Luton | 2003 |
| Downside DIY Ltd | London | 2025 |
| Downside School | Radstock | 2019 |
| Downview Trust | Bognor Regis | 2013 |
| Dowoa Limited | Mitcham | 2025 |
| Doxa Encounters Ministries Ltd | Southampton | 2025 |
| Doxa Group Limited | London | 2018 |
| Doxa Initiatives CIC | Croydon | 2024 |
| DP Academy Ltd | Tipton | 2026 |
| DP Assessing Limited | Brighton | 2014 |
| DP College of Performing Arts Ltd | Chelmsford | 2025 |