| Highcliffe Property Ltd | Real estate | 2025 |
| Highcroft Group Ltd | Hospitality | 2025 |
| Highcroft Property Investment Limited | Real estate | 2022 |
| Higher Fields CIC | Administrative & support | 2026 |
| Higher Space Ltd | Real estate | 2025 |
| Highfield Flooring Ltd | Wholesale & retail | 2024 |
| Highfield Giraffe Properties Limited | Real estate | 2022 |
| Highfield House Cottages Ltd | Hospitality | 2020 |
| Highfield House Tea Rooms Ltd | Hospitality | 2013 |
| Highfield LA Limited | Hospitality | 2026 |
| Highfield PO Ltd | Transport & logistics | 2025 |
| Highfields (Ringinglow) Management Company Limited | Households | 2003 |
| Highgate Homes Limited | Real estate | 2025 |
| Highgate Mini Market Ltd | Wholesale & retail | 2025 |
| Highgate Properties Management Ltd | Real estate | 2025 |
| Highgates Estates Ltd | Real estate | 2024 |
| Highgrange Associates Ltd | Professional & scientific | 2012 |
| Highland Estate Management Ltd | Households | 2023 |
| Highland Executives Limited | Real estate | 2020 |
| Highland Medical Services (UK) Limited | Health & social care | 2012 |
| Highland Security Solutions Ltd | Administrative & support | 2024 |
| Highlight Crafts Limited | Administrative & support | 2021 |
| Highmoor Livery Ltd | Agriculture & fishing | 2022 |
| Highstone Homes Limited | Real estate | 2015 |
| Highstone Renewables Limited | Professional & scientific | 2014 |
| Hightech International Consultancy Ltd | Professional & scientific | 2023 |
| Highverseship Ltd | Wholesale & retail | 2026 |
| Highview Properties Management Ltd | Real estate | 2023 |
| Highway 35 Ltd | Transport & logistics | 2026 |
| Highwings Properties Ltd | Real estate | 2016 |
| Hikehiko Ltd | Wholesale & retail | 2020 |
| Hikki Works Ltd | Information & communication | 2020 |
| Hikmah Education Centre Ltd | Education | 2023 |
| Hilary and FLO Limited | Wholesale & retail | 2015 |
| Hilarys House C.I.C. | Health & social care | 2022 |
| Hill & Co Accountants Ltd | Professional & scientific | 2007 |
| Hill and Sons Roofing Ltd | Construction | 2016 |
| Hill Events Ltd | Administrative & support | 2024 |
| Hill Medical Skin & Health Limited | Health & social care | 2016 |
| Hill Pumps Limited | Professional & scientific | 1990 |
| Hill Top Tots Ltd | Health & social care | 2002 |
| Hill Valley Yoga Ltd | Arts & recreation | 2022 |
| Hill VALLEY85 Limited | Construction | 2020 |
| Hillcliffe Garage Ltd | Wholesale & retail | 2025 |
| Hillcrest Community Limited | Health & social care | 2018 |
| Hillcrest Properties Trading Limited | Real estate | 2023 |
| Hillfoot Skips Limited | Water & waste | 2009 |
| Hillfoot Steel Limited | Wholesale & retail | 1958 |
| Hillgenix Ltd | Construction | 2021 |
| Hillingwell Estates Ltd | Professional & scientific | 2005 |
| Hills Food Supplies Limited | Wholesale & retail | 2026 |
| Hillsborogh Repairs at Your Door Step Ltd | Other services | 2025 |
| Hillsborough Bookshop Limited | Wholesale & retail | 2022 |
| Hillsborough Carwash Ltd | Administrative & support | 2024 |
| Hillsborough Fencing Co. Limited | Administrative & support | 2004 |
| Hillsborough Fencing Properties Limited | Real estate | 2024 |
| Hillsborough Fires & Fireplaces Limited | Wholesale & retail | 2021 |
| Hillsborough Golf Club,Limited | Arts & recreation | 1935 |
| Hillsborough Pizza Ltd | Hospitality | 2021 |
| Hillsborough Sports Management Limited | Professional & scientific | 2012 |
| Hillsborough Steelstock Limited | Wholesale & retail | 1989 |
| Hillsborough Sushi Ltd | Hospitality | 2025 |
| Hillsborough Vape Lounge Limited | Wholesale & retail | 2024 |
| Hillside Builders Limited | Construction | 2013 |
| Hillside Construction Services Ltd | Construction | 2023 |
| Hillside Court Health Care Limited | Health & social care | 2023 |
| Hillside Developments Northern Limited | Construction | 2003 |
| Hillside Gardens Management Company Limited | Households | 2002 |
| Hilltop House Consulting Limited | Professional & scientific | 2016 |
| Hilltop Investment Management Limited | Real estate | 2022 |
| Hilltop Slate UK Limited | Wholesale & retail | 2017 |
| Hillway Holdings Ltd | Real estate | 2022 |
| Hillway Hospitality Ltd | Hospitality | 2025 |
| Hilton Electrical (Penistone) Ltd | Manufacturing | 2005 |
| Hilton Stone Ltd | Professional & scientific | 2020 |
| Hina Care Ltd | Health & social care | 2021 |
| Hinchliffe Farming Limited | Agriculture & fishing | 2001 |
| Hinchliffe Holdings Ltd | Real estate | 2022 |
| Hinde House Investments Limited | Real estate | 2021 |
| Hinde Street Mini Market Limited | Hospitality | 2015 |
| Hindmark Limited | Professional & scientific | 2005 |
| Hinglung Delight Limited | Hospitality | 2025 |
| Hinkler Group Ltd | Manufacturing | 2025 |
| Hinton and Higgs Limited | Real estate | 2017 |
| Hippie Nomads Limited | Wholesale & retail | 2026 |
| Hippie Turtle Herbal Co Ltd | Wholesale & retail | 2021 |
| Hippieyoo Limited | Transport & logistics | 2018 |
| HIR Investments Limited | Professional & scientific | 2019 |
| Hira Car Parts Limited | Water & waste | 2025 |
| Hira's & Son's Ltd | Real estate | 2024 |
| Hire Drive Ltd | Administrative & support | 2015 |
| Hire Henry Ltd | Administrative & support | 2024 |
| Hire Quality Talent Ltd | Administrative & support | 2026 |
| Hire-Trek Limited | Administrative & support | 2016 |
| Hirefox Ltd | Administrative & support | 2024 |
| Hirely Consultants Limited | Administrative & support | 2024 |
| Hirst Properties Ltd | Construction | 2024 |
| Hirstie's Bar Ltd | Hospitality | 2013 |
| Hirundine Investment (Mixed-Use) Property Limited | Real estate | 2025 |
| Hirundine Investment (Residential) Property Limited | Real estate | 2025 |