| Delight Entertainment Limited | High Wycombe | 2024 |
| Delight Racing Ltd | London | 2025 |
| Delightexcite Ltd | London | 2025 |
| Delightfully Dressage Limited | Ampthill | 2026 |
| Delirium Events Limited | Bournemouth | 2017 |
| Delirium Productions Ltd | London | 2024 |
| Deliveraffles Ltd | Stoke-On-Trent | 2024 |
| Deliverance Escape Rooms Limited | Lincoln | 2017 |
| Delivercrew Ltd | Llanelli | 2023 |
| Deliverpool Ltd | Liverpool | 2020 |
| Delivery Captain Limited | London | 2024 |
| Dell Fitness Ltd | Bristol | 2026 |
| Dell Quay Sailing Club Ltd | Chichester | 2014 |
| Dellboy Promotions Ltd | Poole | 2026 |
| Delloydmusic Ltd | Cardiff | 2013 |
| Delofit Ltd | London | 2025 |
| Delph Promotions Limited | London | 2015 |
| Delph Sailing Club,Limited | Darwen | 1966 |
| Delphi Limited | King'S Lynn | 1990 |
| Delphlyx Ltd | Fitzrovia | 2019 |
| Delphy Pool Ltd | Bodmin | 2023 |
| Delsport UK Limited | Stourport-On-Severn | 2024 |
| Delta Academy of Dance & Performing Arts Ltd | Wrexham | 2008 |
| Delta Activities and Sports Ltd | Cinderford | 2022 |
| Delta Dance Limited | Wrexham | 2023 |
| Delta Design Studio Ltd | Hemel Hempstead | 2003 |
| Delta Fitness Ltd | London | 2017 |
| Delta Gymnastics Ltd | Cinderford | 2019 |
| Delta Music Ltd | London | 2025 |
| Delta Padel Limited | Newcastle-Under-Lyme | 2025 |
| Delta Polo Team Limited | Bishops Stortford | 2023 |
| Delta Strength Ltd | Cardiff | 2025 |
| Delta T 2 Limited | Staplefield | 2026 |
| Delta Wealth Limited | Harrow | 2014 |
| DELTA3BASE Limited | Braunton | 2019 |
| Deltaneutral Limited | Northampton | 2022 |
| Delts Gym Limited | Crawley | 2026 |
| Deluxe Art Ltd | Slough | 2026 |
| Deluxe Competitions Cumbria Ltd | City Of London | 2025 |
| Deluxe Comps Limited | Halesowen | 2026 |
| Deluxe DUO Kids Parties Ltd | Marton | 2024 |
| Deluxe Level Ltd | London | 2018 |
| Deluxe Media Limited | | 2007 |
| Deluxe Miscellanea Limited | Inverness | 2024 |
| Deluxe Padle Club Ltd | Andover | 2025 |
| Deluxe Pain Limited | London | 2022 |
| Deluxe Rides Ltd | Bolton | 2018 |
| Deluxe Watch Company Ltd | London | 2024 |
| Deluxx Live Limited | Redruth | 2025 |
| Delvrys Limited | St. Austell | 2024 |
| Delware Limited | London | 2005 |
| DEM Entertainment Limited | Orpington | 2025 |
| DEM Shows Ltd | London | 2022 |
| DEM UK Theatricals Ltd | London | 2022 |
| Demaine Media Limited | Oxford | 2011 |
| Demarae Productions Ltd | London | 2025 |
| Dembe Theatre Services Ltd | Tring | 2024 |
| Demeflex Fitness Limited | Eastleigh | 2021 |
| Demelza Services Limited | Bristol | 1984 |
| Demi ROX Mensah Limited | Harrow | 2025 |
| Demigod Limited | London | 2011 |
| Demiurge Ltd | London | 2018 |
| Demmy the Bookmaker Limited | Warrington | 1993 |
| Demo Reformer Limited | Swindon | 2025 |
| Demon 1 Ltd | 117 Farringdon Road | 1995 |
| Demon Dayz Ltd | London | 2017 |
| Demon Inkorporation Limited | Welling | 2012 |
| Demon Music Group Limited | London | 1982 |
| Demon Time Ltd | Doncaster | 2026 |
| Demradene Limited | Hawthorn Park Coal Road | 2001 |
| Demrahh Play Ltd | Whitby | 2013 |
| DEN of Iniquity Limited | Yeovil | 2002 |
| Dena Zuleika Limited | London | 2026 |
| Denaby United F.C. Limited | Doncaster | 2016 |
| Denada Dance Theatre Ltd | Leeds | 2023 |
| Denaxe Limited | Preston | 1985 |
| Denbigh Museum / Amgueddfa Dinbych | St Asaph | 2012 |
| Denbigh Town Football Club C.I.C. | St Asaph | 2017 |
| Denbighshire Leisure Limited | Denbigh | 2019 |
| Denby Dale Private Pool Limited | Huddersfield | 2025 |
| Denby Dale Tennis Club Limited | Huddersfield | 2008 |
| Denby Equestrian Centre Ltd | Ripley | 2020 |
| Dench Fitness Gym Limited | Buckhurst Hill | 2017 |
| Dende Community | London | 2023 |
| Dendro Live Limited | London | 2022 |
| Dendrology UK Ltd | Southam | 2025 |
| Dene Estate Residents Association Limited | Farnborough | 2016 |
| Denehurst Park (Rochdale) Limited | Rochdale | 1990 |
| Denemouth Caravan Park Limited | Bishop Auckland | 2005 |
| Denev Fitness Limited | Edgware | 2015 |
| Denham Cricket Club Limited | Hayes | 2013 |
| Denham Golf Club Limited | Uxbridge | 1910 |
| Denham Productions Limited | Plymouth | 1985 |
| Denise Clifford Events Ltd | Tenterden | 2015 |
| Denkemp Ltd | Sutton | 2018 |
| Denlife Ltd | Carshalton | 2022 |
| Denman & Goulding Limited | Haydon | 2021 |
| Denman Theatre Limited | London | 2017 |
| Denmark Management Ltd | London | 2025 |
| Denmark Showco 1 Ltd | London | 2025 |