| Hbkl Logistics Limited | Transport & logistics | 2025 |
| HBR (North) Limited | Manufacturing | 1995 |
| HBS Waste Ltd | Water & waste | 2026 |
| HC Hospitality Ltd | Professional & scientific | 2018 |
| HCA Polo Limited | Hospitality | 2000 |
| HD Adventure Limited | Wholesale & retail | 2023 |
| HD Electrical Services Yorkshire Ltd | Construction | 2023 |
| HD Ferguson Holdings Ltd | Transport & logistics | 2023 |
| HD8 Properties Limited | Real estate | 2018 |
| HDK Property Management Ltd | Hospitality | 2025 |
| HDW Solutions Ltd | Professional & scientific | 2019 |
| HDY Dreams Ltd | Health & social care | 2025 |
| Head & Head Veterinary Practice Limited | Professional & scientific | 2013 |
| Headhunters International Ltd | Administrative & support | 2023 |
| Headland 2019 Ltd | Arts & recreation | 2019 |
| Headline Barber 2025 Ltd | Other services | 2026 |
| Headline Barbers 2021 Ltd | Other services | 2025 |
| Headlock Vintage Clothing Limited | Wholesale & retail | 2018 |
| Headway Property Management Limited | Administrative & support | 2008 |
| Healan Ingredients Limited | Wholesale & retail | 2012 |
| Health Addict Ltd | Health & social care | 2013 |
| Health Data Works Ltd | Information & communication | 2025 |
| Health Hire Fitness Limited | Arts & recreation | 2019 |
| Healthgen Limited | Professional & scientific | 2021 |
| Healthline AI Ltd | Information & communication | 2025 |
| Heart and Soul LED Transformations Ltd | Professional & scientific | 2026 |
| Heart Revive Limited | Manufacturing | 2023 |
| Hearthmont Whyte Limited | Extraterritorial | 2026 |
| Hearthstead Homes (York) LLP | | 2007 |
| Hearts Boutique Ltd | Wholesale & retail | 2011 |
| Heartwood Learning Trust | Education | 2011 |
| Heat-On Plumbing & Heating Solutions Ltd | Construction | 2026 |
| Heatec Mechanical Services Limited | Manufacturing | 2003 |
| Heather Simpson Ltd | Administrative & support | 2024 |
| Heatherstone (Romsey) Limited | Health & social care | 2019 |
| Heathfield Gardens (Phase 7) Management Company Limited | Households | 2018 |
| Heavenly Services Ltd | Administrative & support | 2017 |
| Hebburn Riverside Development Limited | Construction | 2018 |
| Hebden Tea Company Ltd | Wholesale & retail | 2011 |
| Heblethwayte Wealth Management Limited | Information & communication | 2015 |
| Hedge & Co Events & Projects Limited | Wholesale & retail | 2016 |
| Hedgerow Heritage | Education | 2004 |
| Hedley House Hotel Limited | Hospitality | 2022 |
| Hedr Developments Limited | Real estate | 1992 |
| HEH Consultants Ltd | Professional & scientific | 2024 |
| Heima Properties Ltd | Real estate | 2021 |
| Held UP Limited | Real estate | 2020 |
| Helen Brierley Limited | Administrative & support | 2022 |
| Helen MAY Consultancy Ltd | Professional & scientific | 2023 |
| Helen Murphy Consulting Ltd | Professional & scientific | 2022 |
| Helen Priestley Ltd | Professional & scientific | 2017 |
| Helianthus Homes Ltd | Real estate | 2017 |
| Helix Architects Ltd | Professional & scientific | 2017 |
| Hello Cello Workshops Ltd | Education | 2025 |
| Helmsdale Consultancy Ltd | Professional & scientific | 2024 |
| Helmsley Finance Limited | Financial services | 2025 |
| Helmsley Land Ltd | Real estate | 2021 |
| Helmsley Meadows Glamping Ltd | Hospitality | 2025 |
| Helmsley Meadows Ltd | Real estate | 2023 |
| Helmsley Opticians Limited | Wholesale & retail | 2018 |
| Helmsley Smiles Ltd | Health & social care | 2021 |
| Helmsley Supplies Ltd | Wholesale & retail | 2025 |
| Helmsley Town Hall Trustee Limited | Administrative & support | 2025 |
| Helmsley Traditional Sweet Shop Ltd | Wholesale & retail | 2026 |
| Helmsley Walled Garden Limited | Agriculture & fishing | 1996 |
| Hema Homes Ltd | Real estate | 2020 |
| Hemlin Porter Stathers Limited | Administrative & support | 2016 |
| Hemp Well Limited | Wholesale & retail | 2017 |
| Henderson & Co Accountants Limited | Professional & scientific | 2021 |
| Henderson & Henderson Limited | Wholesale & retail | 2009 |
| Henderson Benton Holdings Ltd | Professional & scientific | 2025 |
| Henderson Engineering (North East) Limited | Professional & scientific | 1993 |
| Henderson Gifts Limited | Wholesale & retail | 2010 |
| Henderson Taylor Partnership Limited | Professional & scientific | 2001 |
| Henley Chase Limited | Administrative & support | 2024 |
| Henley Contract Services Ltd | Other services | 2017 |
| Henley Court (Bishopthorpe) Limited | Households | 2005 |
| Hennessy & Sons Properties Ltd | Real estate | 2026 |
| Henry Hadfield Ltd | Arts & recreation | 2026 |
| Henry Legal Services Ltd | Professional & scientific | 2024 |
| Heppni Bakeri Ltd | Hospitality | 2023 |
| Hera Regeneration Limited | Professional & scientific | 2013 |
| Hera Social (York) Limited | Hospitality | 2026 |
| Heracles Health Group Limited | Financial services | 2025 |
| Herbert Imalingat Ltd | Health & social care | 2013 |
| Herbert Wilby Estates Ltd | Real estate | 2021 |
| Herbert Wilby Limited | Information & communication | 2006 |
| Herbie's Limited | Wholesale & retail | 2015 |
| Hercberg International Limited | Professional & scientific | 2011 |
| Heritage Cartography Limited | Information & communication | 2015 |
| Heritage Collection Travel Ltd | Administrative & support | 2020 |
| Heritage Gate (Llantwit Major) Residents Management Company Limited | Households | 2014 |
| Heritage Projects (Management) Limited | Arts & recreation | 1999 |
| Heritage Projects (Portsmouth) Limited | Arts & recreation | 2004 |
| Heritage Projects (York) Limited | Arts & recreation | 2011 |
| Hermitage Homes (Yorkshire) Limited | Construction | 2019 |
| Hernando Grenada Limited | Professional & scientific | 2013 |
| Herne Vale Ilminster Management Company Limited | Households | 2014 |
| Hero Fitness Coaching Ltd | Other services | 2025 |
| Hero Tyre Service Ltd | Wholesale & retail | 2015 |