| Houston Tate Limited | Coleraine | 2016 |
| Hoverhawk Ltd | Welshpool | 2024 |
| Hoverstock Limited | Salisbury | 1983 |
| HOW Caple Estate Limited | | 1926 |
| HOW END Farms | Carlisle | 2008 |
| HOW END Livery Ltd | Bedfordshire | 2009 |
| HOW Farming Limited | Hitchin | 2016 |
| HOW Farms Limited | Orkney | 2011 |
| HOW NOW Dairy Ltd | Exeter | 2016 |
| HOW2FISHTANK Ltd | St Austell | 2024 |
| Howahill Farming Company Limited | Roxburghshire | 2003 |
| Howard & Co Farming Limited | Retford | 2014 |
| Howard Agriculture Ltd | Leyburn | 2019 |
| Howard Cooper Ltd | Carlisle | 2018 |
| Howard Equestrian Limited | Retford | 2011 |
| Howard Farming Ltd | Haslemere | 2009 |
| Howard Farms Limited | Peterborough | 2010 |
| Howard Glendenning Land Management Contractors Limited | Alton | 2025 |
| Howard King Tree Surgeons Limited | Horsham | 2010 |
| Howard Properties Limited | Banbury | 1987 |
| Howard-Higgins International Limited | Maesteg | 2014 |
| Howat Rearing Ltd | Lydney | 2012 |
| Howdale Bloodstock Ltd | Grantham | 2009 |
| Howden Enterprises Ltd | Dungannon | 2015 |
| Howdenshire PIG Company Limited | Beverley | 2011 |
| Howe Estates Company Limited | North Yorkshire | 1948 |
| Howe Farming Limited | Halstead | 2018 |
| Howe Hill Farm Ltd | Middlesbrough | 2024 |
| Howe Hill Farm North Deighton Limited | Wetherby | 2025 |
| Howe Tree Surgery Ltd | Ilminster | 2020 |
| Howe Winterberry Limited | Forfar | 2025 |
| Howeburn Livestock Services L Ltd | Lanark | 2023 |
| Howells Farms Limited | Chepstow | 2016 |
| Howemuir Holdings Ltd | Peterhead | 2021 |
| Howes Farming Company | Penrith | 2018 |
| Howes Sporting Club Limited | Winchester | 2023 |
| Howetown Farm Limited | Somerset | 1997 |
| Howfens Trees Ltd | Manchester | 2024 |
| Howfield Dairy | Carlisle | 2011 |
| Howie Farming Limited | York | 2003 |
| Howie Forestry Solutions Ltd | Mauchline | 2021 |
| Howkins Farm (Compton) Limited | Totnes | 1976 |
| Howlett Boarding Kennels Ltd | Chester Le Street | 2023 |
| Howlett Farming Company Limited | King'S Lynn | 2012 |
| Howletts Honeybees Ltd | Stonehouse | 2015 |
| Howlett’S Professional Tree Services Ltd | Ware | 2024 |
| Hownice Ltd | Stockport | 2016 |
| Howper 650 Limited | Carnforth | 2008 |
| Howper 653 Limited | Carnforth | 2008 |
| Howseman Agriculture Limited | Sleaford | 2012 |
| Howson Farming Limited | Stourbridge | 2024 |
| Howton Farm Limited | Hereford | 1987 |
| Hoyles Farming Limited | Spalding | 2003 |
| Hoyles Honey Limited | Navestock Side | 1998 |
| Hoys and Bows EGG and Game Rearing Services Ltd | Bedford | 2019 |
| Hoys Bloodstock Limited | Chesham | 2018 |
| HP Fabrication Ltd | Leigh-On-Sea | 2017 |
| HPS Fishing Ltd | Whiteness | 2024 |
| HQ Shellfish Limited | Ardrossan | 2012 |
| HR Contacting & Agri Services Ltd | Alcester | 2024 |
| HRB Equestrian Ltd | Radlett | 2025 |
| HRF Business Solutions Limited | Ilminster | 2017 |
| HRG Tree Surgeons Limited | Southampton | 2012 |
| HRJ Gould Limited | Nr Admaston Rugeley | 2004 |
| HRJ Gould Properties Ltd | Rugeley | 2009 |
| HRL Agri Ltd | Omagh | 2015 |
| HRM Polo Limited | Haslemere | 2013 |
| HS Blooms Ltd | Kirriemuir | 2022 |
| HS Eco Holdings Ltd | Derby | 2021 |
| HS Eco Partnerships Ltd | Derby | 2021 |
| HS Land and Farms Ltd | Salisbury | 2024 |
| HS Seed Testing Limited | Lincoln | 2023 |
| HSB Properties Limited | London | 1988 |
| HSC Poultry Limited | | 2009 |
| Hscc Limited | Lancaster | 2014 |
| HSF (Scotland) Ltd | Elgin | 2015 |
| HSR Agri Ltd | Driffield | 2023 |
| HST Logistics Limited | Richmond | 2024 |
| HT & GM Knott Ltd | Stalbridge | 2023 |
| HTC Arbor Services Ltd | Northampton | 2016 |
| HTD Forestry Ltd | Clitheroe | 2020 |
| HTD Transport Ltd | Preston | 2019 |
| HTI2020 Ltd | London | 2015 |
| HTL Investments Limited | York | 2022 |
| HTQ Farm Ltd | London | 2023 |
| Hubbard Fisheries Ltd | Lancing | 2018 |
| Hubbards Seeds Limited | Devizes | 2012 |
| Hubberston Offshore Charters Limited | North Shields | 2019 |
| Hubble Aquacare Limited | Hastings | 2022 |
| Hubertus Game Ltd. | Pitlochry | 2007 |
| Hubond Ltd | London | 2025 |
| Hubu International Ltd | St Albans | 2022 |
| Huckleberry Land & Woodland Ltd | York | 2025 |
| Huckleberry Ponies Ltd | Poole | 2025 |
| Hucropea Limited | Southampton | 2016 |
| Huddersfield Arborists Ltd | Leeds | 2024 |
| Huddersfield Tree Cutting and Garden Maintenance Ltd | Huddersfield | 2023 |
| Huddlestone Farmers Limited | Steyning | 1987 |
| Hudgill Rigg Farm Ltd | Stokesley | 2024 |
| Hudora Pet Hotel Limited | Chorley | 2002 |