| Investhor LtdLondon, United Kingdom · UKchecked 26 Oct 2026 | UK | 0 | – | – | – | – | – |
| Invivo Wines UK LtdKettering, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2018 |
| Ionica Wine LtdSutton, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2019 |
| Ipl LtdDudley, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1997 |
| Ipsosolo LtdLeeds, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2009 |
| Iq Eq Administration Service S LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2014 |
| Isake International LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2001 |
| Iside Wine LtdOldham, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2022 |
| Isla Pine LtdEdgware, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2025 |
| Island Drinks LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2018 |
| Isola Edinburgh LimitedEdinburgh, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2017 |
| Isometrix Lighting &DESIGN LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1992 |
| It Restaurant LimitedLondon, United Kingdom · UKchecked 26 Oct 2026 | UK | 0 | – | – | – | – | – |
| Italia Wine and Food LtdUnited Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2018 |
| Italian Continental Stores LimitedMaidenhead, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1991 |
| Italian Ecommerce LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2016 |
| Italian Food Holding LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2021 |
| Italian Furniture Distribution LimitedWelwyn, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2022 |
| Italian Touch LtdHarlow, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2002 |
| Italica UK LtdBlaydon-on-Tyne, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2008 |
| Italnatural WinesRomford, United Kingdom · UKitalnaturalwines.com · checked 28 Oct 2026 | UK | 0 | – | – | – | – | 2024 |
| Italtaste LimitedWoking, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2010 |
| Italy Abroad Network LimitedLeeds, United Kingdom · UKitalyabroad.com · checked 28 Oct 2026 | UK | 0 | – | – | – | – | 2003 |
| Itasca Group PLCCrondall, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2018 |
| Iveria Wines LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2025 |
| Ivor Braka LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1984 |
| Iwc Events LimitedAmersham, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2024 |
| J & C Omeara LtdBurscough, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1990 |
| J & de LtdMarket Harborough, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2017 |
| J A Rose LtdMacclesfield, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2009 |
| J C & R H Palmer LimitedBridport, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1975 |
| J Chandler & Co LtdAndover, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1927 |
| J D Wetherspoon PLCWatford, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1983 |
| J F H Trading LimitedEnfield, United Kingdom · UKchecked 26 Oct 2026 | UK | 0 | – | – | – | – | – |
| J G Pears LimitedSheffield, United Kingdom · UKchecked 26 Oct 2026 | UK | 0 | – | – | – | – | – |
| J Garcia Carrión UK LimitedLeeds, United Kingdom · UKgarciacarrion.com · checked 1 Nov 2026 | UK | 0 | – | – | –Value (producers) | 0% | 2019 |
| J Townend & Sons LtdNorth Ferriby, United Kingdom · UKhouseoftownend.com · checked 28 Oct 2026 | UK | 0 | – | – | –Premium (producers) | 21% | 1962 |
| J V International LtdWilmslow, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2006 |
| J W Filshill LtdRenfrew, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1936 |
| J W Lees & Co LtdManchester, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1955 |
| J W Richens Trading LtdSutton, United Kingdom · UKchecked 26 Oct 2026 | UK | 0 | – | – | – | – | – |
| J&B Selections LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2025 |
| J&W Nicholson & Co LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2016 |
| J. Davidson Scrap Metal Proc Essors LimitedAltrincham, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2011 |
| J.c. Bamford Excavators LimitedUttoxeter, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1956 |
| J.l. Leisure LtdLlandudno, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2002 |
| Jab Partners LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2021 |
| Jace Wines LimitedDartford, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2019 |
| Jack Nadel International LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2000 |
| Jackson & Seddon LtdHigh Wycombe, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2017 |