| Harperwells LtdEye, United Kingdom · UKharperwells.com · checked 28 Oct 2026 | UK | 1 | – | – | –Premium (producers) | 6% | 2006 |
| Hascombe & Valiant Stud LimitedNewmarket, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2015 |
| Hatchbury LimitedSawbridgeworth, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2014 |
| Hawkes Farms LtdSpilsby, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1959 |
| Hecho A Mano LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2015 |
| Heckfield Catering LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2010 |
| Hemisphere Freight Services LimitedIpswich, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1989 |
| Hercules Wine WarehouseSandwich, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2007 |
| Heritage Advisors LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2019 |
| Hildon LimitedHampshire, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1984 |
| Hillbridge Estates LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1997 |
| Himalaya Wines LimitedBristol, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2015 |
| Hmt LLPHenley-on-Thames, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2008 |
| Hokkaido Fine Foods LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2023 |
| Holland Park Restaurant LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2021 |
| Holliday's LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2020 |
| Holly House Hire LimitedRoss-Shire, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2006 |
| Home of Wine LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2021 |
| Hotel Property InvestorsUnited Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1980 |
| Houlihan Lokey LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2001 |
| House of Bordeaux LtdBillericay, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2023 |
| Howden Group Holdings LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1994 |
| Hqw Aerospace LimitedPlymouth, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1948 |
| Hudson Bay Capital Managemen T LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2018 |
| Hunted Productions LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2024 |
| Huntsbridge LtdUnited Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1994 |
| I2 Analytical LtdWatford, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2003 |
| Iconic Distro Company LtdHenley in Arden, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2022 |
| Idem Safety Switches LimitedWigan, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2003 |
| Iforce LtdWarrington, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1997 |
| Ikou LimitedNorth Shields, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2025 |
| Il-Uk Fresh Produce LimitedHarrow, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2011 |
| Imagination Technologies LimitedKings Langley, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1977 |
| Imagine Capital LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2017 |
| Impact Xm Europe LtdLeatherhead, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2009 |
| Imperial Treasure Co., LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2016 |
| Inaparc LtdAlcester, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2009 |
| Inbrit Logistics LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1995 |
| Indie Brands LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2011 |
| Indimart Food & Beverages LimitedMilton Keynes, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2022 |
| Inflexion Private Equity Partners LLPLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2005 |
| Innerworkings Europe LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1984 |
| International Plywood LtdStonehouse, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1981 |
| International Wine LimitedIlkley, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2020 |
| Intocast UK LtdRotherham, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2003 |
| Intrepid Wines LtdShepton Mallet, United Kingdom · UKintrepidwines.com · checked 28 Oct 2026 | UK | 1 | – | – | –Value (producers) | 0% | 2025 |
| Intriva Services LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2016 |
| Invivo Wines UK LtdKettering, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2018 |
| Ipl LtdDudley, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1997 |
| Iq Eq Administration Service S LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2014 |