| Herrick Inc Limited | Extraterritorial | 2014 |
| Herrington Grange (Philadelphia) Management Company Limited | Households | 2021 |
| Herrington Holidays Ltd | Hospitality | 1998 |
| Heslington Construction Limited | Construction | 2019 |
| Heslington Fresh Foods Limited | Wholesale & retail | 2005 |
| Heslington Noodle Lane Limited | Hospitality | 2022 |
| Heslington Way Management Company Limited | Households | 2006 |
| Hesp Jones and Company Limited | Construction | 2014 |
| Hesper Estates Limited | Extraterritorial | 2000 |
| Hestia Consultancy Ltd | Professional & scientific | 2003 |
| Hestia Realty Ltd | Real estate | 2019 |
| Hetherton Property Developments Ltd | Professional & scientific | 2024 |
| Hethertons LLP | | 2006 |
| Hethertons Solicitors Limited | Professional & scientific | 2014 |
| Heugh Hall (Coxhoe) Residents Management Company Limited | Real estate | 2022 |
| Hevida Ltd | Wholesale & retail | 2017 |
| Hewitt & Walker Ltd | Information & communication | 2017 |
| Heworth Arlfc Trading Bar Ltd | Hospitality | 2025 |
| Heworth Associates Limited | Professional & scientific | 2005 |
| Heworth Croft Limited | Households | 2007 |
| Heworth Green LLP | | 2006 |
| Heworth Mews (15-20) Freehold Limited | Real estate | 2005 |
| Heworth Mews (7-14) Freehold Limited | Real estate | 2005 |
| Heworth Mews Residents Association Limited | Households | 2001 |
| Heworth Osteopathic Practice | Health & social care | 2010 |
| Heworth Roofing & Groundworks Ltd | Construction | 2025 |
| Heworth York Ltd | Hospitality | 2020 |
| Hewson and Robinson Ltd | Wholesale & retail | 2016 |
| Hexagon Invest Limited | Financial services | 2025 |
| Hexaunion Ltd | Administrative & support | 2026 |
| Hexigon Horizon Limited | Financial services | 2022 |
| HEY Farming Limited | Agriculture & fishing | 2009 |
| HEY Holdings Limited | Financial services | 2021 |
| HEY Martha Research Ltd | Professional & scientific | 2024 |
| HEY Renewables Limited | Energy | 2015 |
| Heywood Veterinary Centre Limited | Extraterritorial | 2013 |
| HFH Associates Ltd | Professional & scientific | 2025 |
| HFR Antiques Limited | Wholesale & retail | 2025 |
| HG Cattery Ltd | Other services | 2025 |
| HG Luxury Real Estate Ltd | Real estate | 2024 |
| HGE Consulting Limited | Professional & scientific | 2013 |
| Hgfoc Ltd | Real estate | 2024 |
| Hggas Ltd | Real estate | 2024 |
| HGW Chiro Limited | Health & social care | 2023 |
| Hhcg Limited | Real estate | 2022 |
| HHE Holdings Ltd | Administrative & support | 2019 |
| HHE Sourcing Limited | Wholesale & retail | 2011 |
| Hhow Fit Limited | Health & social care | 2003 |
| HIA Property York Ltd | Real estate | 2025 |
| Hiatus Consulting Ltd | Professional & scientific | 2018 |
| Hidden Arts Ltd | Information & communication | 2024 |
| Hidden Door Ltd | Information & communication | 2012 |
| Hidden Talents (Europe) Ltd | Administrative & support | 2008 |
| Hidden Theatre | Education | 2016 |
| Hidden Wines Ltd | Wholesale & retail | 2024 |
| Hide Northern Limited | Professional & scientific | 2019 |
| Hideaway Hotels Limited | Hospitality | 2004 |
| Hides Motorcycles Ltd | Wholesale & retail | 2022 |
| High Bields Management Company Limited | Water & waste | 2001 |
| High Buston Property Holdings Limited | Real estate | 1986 |
| High Five Management Services Limited | Professional & scientific | 2018 |
| High Garth (Earswick) Management Company Limited | Real estate | 2004 |
| High Oaks 2021 Freehold Management Company Limited | Households | 2021 |
| High Park Farm LLP | | 2012 |
| High Reach Demolition Ltd | Construction | 2012 |
| Higham Lane Management Company Limited | Households | 2019 |
| Highcroft Court Acomb Flats Limited | Households | 2015 |
| Highfield RTM Company Limited | Households | 2023 |
| Highfinish Accident Repair Limited | Wholesale & retail | 2024 |
| Highgrove (Northallerton) Management Company Limited | Households | 2021 |
| Highgrove Equity Ltd | Real estate | 2020 |
| Highland Facilities Services Limited | Water & waste | 2026 |
| Highland Retreat Park Limited | Real estate | 2014 |
| Highrise Properties & Development Ltd | Real estate | 2025 |
| Highthorne Gardens Management Company Limited | Households | 2022 |
| Highthorne Homes Limited | Construction | 1997 |
| Hightide Estates Limited | Real estate | 2007 |
| Hightown Group Ltd | Manufacturing | 2024 |
| Hightune Limited | Wholesale & retail | 2004 |
| Highway Adoptions Ltd | Professional & scientific | 2022 |
| Highwood Motors Ltd | Wholesale & retail | 2018 |
| Hiho Recruitment Consultants Limited | Administrative & support | 2016 |
| Hikikomori Ltd | Hospitality | 2018 |
| Hilary Bohl Dyslexia Specialist Limited | Education | 2023 |
| Hilbra Investments Ltd | Financial services | 2025 |
| Hildebrant Limited | Health & social care | 2007 |
| Hill Barton Vale Exeter Management Company Limited | Households | 2015 |
| Hill Barton Vale Flats Exeter Management Company Limited | Households | 2016 |
| Hill Electrical Solutions Ltd | Construction | 2024 |
| Hill Fencing and Countryside Services Ltd | Construction | 2024 |
| Hill Pro Audio Ltd | Manufacturing | 2020 |
| Hill Top View (Melton) Management Company Limited | Households | 2026 |
| Hill Valley Hotel Golf & Country Club Limited | Professional & scientific | 2003 |
| Hillcroft 1936 Ltd | Wholesale & retail | 2020 |
| Hillfield Meadows (Sunderland) Management Company Limited | Households | 2020 |
| Hillgate Construction Ltd | Construction | 2020 |
| Hillreed Developments Limited | Construction | 1994 |
| Hillreed Holdings Limited | Professional & scientific | 2003 |
| Hillreed Homes Limited | Construction | 1975 |
| Hillreed Properties Limited | Real estate | 1984 |