- J D WetherspoonRestaurants & cafés · 197973
- J.C. Bamford ExcavatorsBusiness & industry · 194573
- J.W. Lees BreweryDrinks · 182858
- Jack & JonesFashion & accessories · 199052
- Jack Daniel'sDrinks · 186655
- Jack WillsFashion & accessories · 1999
- JagexMedia, music & games · 200173
- JaguarCars, bikes & motorbikes · 193564
- JamesonDrinks · 1780
- JanesMedia, music & games · 1898
- JD SportsShops & marketplaces · 198161
- JeepCars, bikes & motorbikes · 194145
- JessopsShops & marketplaces · 193561
- Jet2Travel & hotels · 200264
- Jimmy ChooFashion & accessories · 199652
- Jo Malone LondonBeauty & grooming · 199476
- John LaingBanks, insurance & finance · 184873
- John LewisShops & marketplaces · 186479
- John Lobb BootmakerFashion & accessories · 1866
- John MurrayMedia, music & games · 176839
- John SmedleyFashion & accessories
- John Smith's BreweryDrinks · 185245
- John Wood GroupEnergy, telecoms & utilities · 1982
- Johnnie WalkerDrinks · 182079
- Johnson & JohnsonBusiness & industry · 188673
- Johnson MattheyBusiness & industry · 181752
- Johnstons of ElginFashion & accessories · 179776
- JoJo Maman BébéFashion & accessories · 199352
- JordansFood · 1855
- Joseph Holt's BreweryDrinks · 184970
- Joseph JosephHome & design · 200367
- JoulesFashion & accessories · 198970
- Jura distilleryDrinks · 181042
- Just EatApps & fintech · 199870
- JW AndersonFashion & accessories · 2008
- JägermeisterDrinks · 193570
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