- D. C. ThomsonMedia, music & games · 190585
- DAFCars, bikes & motorbikes · 192848
- Daftmill distilleryDrinks · 200558
- Daily ExpressMedia, music & games · 190073
- Daily MailMedia, music & games · 189658
- Daily MirrorMedia, music & games · 1903
- Daily RecordMedia, music & games · 1895
- Daily StarMedia, music & games · 197864
- The Daily TelegraphMedia, music & games · 185573
- Dairy CrestFood · 198161
- DAKSFashion & accessories · 189467
- Dalmore distilleryDrinks · 183979
- Daniel Batham and SonDrinks · 1877
- Daunt BooksShops & marketplaces45
- David Brown AutomotiveCars, bikes & motorbikes · 201345
- David Lloyd LeisureSport & fitness · 199067
- DazedMedia, music & games · 199152
- De La RueBusiness & industry · 182167
- Deanston distilleryDrinks · 196642
- DebenhamsShops & marketplaces · 1778
- DecathlonBusiness & industry
- DeccaMedia, music & games · 192976
- Deep SilverMedia, music & games · 200276
- DeliverooApps & fintech · 201379
- DellTech & gadgets · 198982
- DeloitteBusiness & industry · 184570
- Delta Air LinesTravel & hotels · 192558
- Den of GeekMedia, music & games · 200752
- DenbyHome & design61
- DepopApps & fintech
- Derwent Cumberland Pencil CompanyShops & marketplaces · 191661
- Design MuseumArts, culture & events · 198948
- DettolBeauty & grooming · 193273
- DFSShops & marketplaces · 1983
- DHLEnergy, telecoms & utilities · 196979
- DiageoDrinks · 199782
- Direct Line GroupBanks, insurance & finance · 201267
- DishoomRestaurants & cafés · 201070
- Disney+Apps & fintech · 2019
- Dixy ChickenRestaurants & cafés · 1986
- DJ MagazineMedia, music & games · 199155
- Doctor Who MagazineMedia, music & games · 197945
- Dominion TheatreArts, culture & events33
- Domino Recording CompanyMedia, music & games · 199352
- Domino's Pizza GroupRestaurants & cafés · 1985
- Dorchester CollectionTravel & hotels · 1996
- DoritosFood · 196464
- Dorothy PerkinsFashion & accessories · 190967
- Douwe EgbertsDrinks · 175339
- Dover Street MarketShops & marketplaces52
- Download FestivalArts, culture & events · 200373
- Dr. MartensFashion & accessories · 1951
- Dr. Scholl'sFashion & accessories · 190676
- Drake'sShops & marketplaces · 197767
- DrambuieDrinks · 191067
- Drax GroupEnergy, telecoms & utilities · 2005
- DreamsShops & marketplaces · 198573
- DS AutomobilesCars, bikes & motorbikes · 200964
- DucatiCars, bikes & motorbikes · 192670
- DuluxHome & design · 193158
- Dunelm GroupShops & marketplaces · 197973
- Dunlop SportSport & fitness · 195755
- Dunlop TyresCars, bikes & motorbikes · 198548
- DuolingoApps & fintech55
- DysonTech & gadgets · 199161
Share of 26 technical checks the site passes: security, speed, email and SEO. A measurement of the website — not a popularity ranking.