| Heathfield Trading Limited | Taunton | 2025 |
| Heathland Fountains Limited | Great Yarmouth | 2018 |
| Heathland Group Limited | Great Yarmouth | 2018 |
| Heathlands Farm Ltd | King'S Lynn | 2020 |
| Heathlands Grow Your Own Ltd | Sandhurst | 2015 |
| Heathlands Livery Yard Limited | Wimborne | 2017 |
| Heathpatch Limited | Ipswich | 1997 |
| Heathstud Ltd | Knighton | 2015 |
| Heathwood Nurseries Limited | Cheshire | 1999 |
| Heathwood Stud Ltd | London | 2019 |
| Heatleys Estate Ltd | Brentwood | 2022 |
| Heaton Farms Limited | Petworth | 2009 |
| Heatons Plant Displays Limited | Leeds | 2006 |
| Heavenly Trees Ltd | Chipping Norton | 2019 |
| Heaven’S Microgreens Ltd | Plymouth | 2022 |
| Heaver Agriculture Limited | Chichester | 2022 |
| Heaver Farms Limited | Chichester | 1993 |
| Heavy Horse Power Limited | Barnstaple | 2022 |
| Hebblewhite Limited | Doncaster | 2000 |
| Heber Park Beltex Ltd | Skipton | 2021 |
| Hebridean Forestry Ltd | Narberth | 2012 |
| Hebridean Growers Ltd | Isle Of South Uist | 2026 |
| Hebridean Livestock Marketing Company Limited | Stornoway | 1985 |
| Hebridean Pet & Livestock Services Ltd | Isle Of Lewis | 2023 |
| Hebridean Sea Plants Ltd | Isle Of North Uist | 2024 |
| Hebridean Smolts Limited | Western Isles | 2002 |
| Hebridean Tea Company Limited | Isle Of Lewis | 2018 |
| Hebridean Wildfoods Limited | Isle Of Lewis | 2018 |
| Hebrideanventures Ltd | Isle Of Skye | 2025 |
| Hebrides Hydroponics Organisation Ltd | Isle Of Lewis | 2022 |
| Heckley Seeds Limited | Alnwick | 2013 |
| Hector W.Smith Limited | Stratford-Upon-Avon | 1934 |
| Hector's Farm Ltd | Nottingham | 2019 |
| Hectors Consultancy Ltd | Nottingham | 2014 |
| Hedden Dairies Limited | Bideford | 2026 |
| Hedge Estate Contracting Limited | Hungerford | 2016 |
| Hedge Habitats Ltd | London | 2026 |
| Hedge Space CIC | Rayleigh | 2023 |
| Hedgeberry Ltd | Maidstone | 2017 |
| Hedgerow Farm Limited | Bathgate | 2011 |
| Hedgerow Honey Bees Ltd | Shrewsbury | 2024 |
| Hedges & Hurdles Limited | Haslemere | 2023 |
| Hedges & Moor Ltd | Yelverton | 2026 |
| Hedges and Meadows CIC | Glasgow | 2025 |
| Hedges R-Us Ltd | Huntingdon | 2024 |
| Hedgeside Farm Produce Limited | Darlington | 2013 |
| Hedgeway Ltd | Newcsatle Upon Tyne | 2024 |
| Hedging and Trees UK Limited | London | 2026 |
| Hedging UK (Nurseries) Limited | Ormskirk | 2023 |
| Hedley Lomas Ltd | Kettering | 2009 |
| Heel Yeah Ltd | Airdrie | 2025 |
| Heeley City Farm Limited | | 1987 |
| Hefin Davies Ltd | Clynderwen | 2010 |
| Heights Tree Care Limited | Reading | 2022 |
| Heightside Farm Limited | Stockport | 2021 |
| Heilan Ltd | Aviemore | 2024 |
| Helen Swaddle Limited | Brackley | 2014 |
| Helenus Fishing Limited | Peterhead | 2022 |
| Helethorpe Farming Ltd | Market Rasen | 2024 |
| HELFINIAN3 Ltd | Daventry | 2024 |
| Helford River Oysters Ltd | Penzance | 2018 |
| Heli-X Drone Services Limited | London | 2025 |
| Helionix Developments Limited | Hailsham | 1979 |
| Helium Racing Limited | Wellington | 2019 |
| Hellington Farm Limited | Norwich | 1997 |
| Helliwell & Mott Limited | Worksop | 2008 |
| Hello Lello Ltd | Cambridge | 2022 |
| Helm AG Ltd | Cardiff | 2017 |
| Helmdon Sawmills Limited | Helmdon | 1964 |
| Helme Edge Vineyard Limited | Holmfirth | 2023 |
| Helmsley Walled Garden Limited | York | 1996 |
| Helmsman (Fishing) Limited | | 2006 |
| Help 4 Hounds Rescue Ltd | Highbridge | 2021 |
| Help and Heal Community Project Ltd | Bournemouth | 2024 |
| Help to Manage Limited | Milton Keynes | 2024 |
| Helpful Highs Limited | London | 2021 |
| Helping Dogs and Cats CIC | Basingstoke | 2022 |
| Helyer Farm Limited | Chichester | 2012 |
| Helyg Crafts Limited | Abergavenny | 2021 |
| Helyg Tree Surveys Ltd | Abergavenny | 2021 |
| HEM & TRS Ltd | Haverfordwest | 2016 |
| Hemingford Park Hospitality Limited | Peterborough | 2020 |
| Hemingway Forward Limited | Borehamwood | 2009 |
| Hemley Hill Farm Ltd | Princes Risborough | 2024 |
| Hemmingway Estate Ltd. | Cheltenham | 2007 |
| Hemp Holistics Ltd | Plymouth | 2018 |
| Hemp North Limited | Alnwick | 2021 |
| Hemp Pollen Ltd | Southampton | 2014 |
| Hemp Works Ltd | Portadown | 2019 |
| Hempen | Reading | 2015 |
| Hempgate Limited | Henley-On-Thames | 1977 |
| Hemsley Conservation Centre Ltd. | Sevenoaks | 2015 |
| Hemsley Hydro Ltd | Newquay | 2018 |
| HEN House Barns Limited | Aylesbury | 2022 |
| HEN Weekend Chicken Boarding Ltd | Gillingham | 2025 |
| Henacre Thoroughbreds Ltd | Kingsbridge | 2025 |
| Henbant Land Ltd | Caernarfon | 2011 |
| Henbant Ltd | Caernarfon | 2025 |
| Henden Manor Estates Limited | Sevenoaks | 1997 |
| Henderson Agriculture Contracting Ltd | By Dingwall | 2025 |