| Hartley D Contracting Ltd | Professional & scientific | 2020 |
| Harts Bakehouse Ltd | Manufacturing | 2023 |
| Harts Coffee House & Deli Ltd | Hospitality | 2023 |
| Harvest Professional Services Ltd | Professional & scientific | 2025 |
| Harvey Property Partners Ltd | Real estate | 2026 |
| Hattonhomesselby Ltd | Construction | 2024 |
| Hawe and Hawe Property Ltd | Real estate | 2025 |
| Hawe Interiors Ltd | Construction | 2023 |
| Hawick Hotels Limited | Hospitality | 2021 |
| Hayloft Mobile Veterinary Services Ltd | Professional & scientific | 2023 |
| Hayward Housing Ltd | Real estate | 2025 |
| Headley Green Limited | Energy | 2011 |
| Headley Property Limited | Real estate | 2017 |
| Heather Alstead Design Ltd | Households | 2015 |
| Heather Dixon Features Ltd | Information & communication | 2010 |
| Helidragon Ltd | Professional & scientific | 2020 |
| Hello Phone and Vape Ltd | Wholesale & retail | 2023 |
| Hendersons Holdings (Selby) Limited | Transport & logistics | 2023 |
| Hendersons of Selby Limited | Transport & logistics | 1996 |
| Herapath Limited | Other services | 2023 |
| HERE2GROW Ltd | Professional & scientific | 2011 |
| Hermes Medical Ltd | Health & social care | 2023 |
| Hernon Holdings Ltd | Financial services | 2025 |
| Hersteel Workwear Ltd | Manufacturing | 2026 |
| HFB Services Ltd | Manufacturing | 2018 |
| HH Logistics Management Limited | Professional & scientific | 2023 |
| Hh&C Ltd | Professional & scientific | 2024 |
| HI Time Limited | Manufacturing | 2011 |
| HIB Trading Ltd | Transport & logistics | 2026 |
| High Trees Pet Cremation Ltd | Agriculture & fishing | 2025 |
| High Trees Pet Services Ltd | Other services | 2025 |
| Highfield Grange Construction Limited | Construction | 2014 |
| Highfield Grange Management Limited | Information & communication | 2011 |
| Highfield Post Production Limited | Administrative & support | 2017 |
| Hill Top Engineering and Fabrication Ltd | Professional & scientific | 2013 |
| Hins Selby Ltd | Hospitality | 2023 |
| Hipsters Limited | Wholesale & retail | 2003 |
| Hirst Mechanical Engineering Ltd | Professional & scientific | 2023 |
| Hirwaun Power Limited | Administrative & support | 2012 |
| HJD Property Ltd | Real estate | 2026 |
| HK Brother Ltd | Wholesale & retail | 2026 |
| HL Fabrics Limited | Wholesale & retail | 2023 |
| Holbarn Ltd | Hospitality | 2013 |
| Holden Brown Limited | Real estate | 2024 |
| Holgate Partners Ltd | Construction | 2022 |
| Hollond Food Ltd | Hospitality | 2022 |
| Holly Forge Farming Ltd | Agriculture & fishing | 2025 |
| Hollybank Estates Ltd | Real estate | 2018 |
| Hollytree Limited | Construction | 2025 |
| Home & House Properties Ltd | Real estate | 2024 |
| Home Farm Rentals Ltd | Real estate | 2025 |
| Home James York Limited | Transport & logistics | 2013 |
| Honey Thief Limited | Manufacturing | 2025 |
| Hoofcare Supplies Ltd | Agriculture & fishing | 2025 |
| Hopesreal Properties Ltd | Real estate | 2025 |
| Horror Film Productions Limited | Information & communication | 2021 |
| House of Inks Studio, North Yorkshire Ltd | Other services | 2026 |
| Howarth Trading Limited | Wholesale & retail | 2005 |
| Howdall Interiors Ltd | Construction | 2024 |
| Howden Marine Surveys Limited | Professional & scientific | 2023 |
| Howsham Homes Ltd | Construction | 2019 |
| HSP Superstore Ltd | Wholesale & retail | 2022 |
| Humble Heritage Ltd | Professional & scientific | 2015 |
| Huntington Kinder Class Ltd | Education | 2019 |
| HV Maintenance Limited | Other services | 2023 |
| HWI Developments Limited | Construction | 2021 |
| HWI Group Limited | Financial services | 2021 |
| HWI Rentals Limited | Real estate | 2018 |
| HWI Services Limited | Construction | 2017 |
| Hydraulics & Pneumatics (Selby) Limited | Manufacturing | 2012 |
| Hygieia Group Limited | Administrative & support | 2016 |
| I Thalassa Ltd | Real estate | 2026 |
| I.T.Electrical (Yorkshire) Ltd | Construction | 2006 |
| IAN Mitchell Properties Ltd | Real estate | 2023 |
| IAT Construction Ltd | Construction | 2025 |
| Ibath International Ltd | Wholesale & retail | 2022 |
| IBD Capital Limited | Financial services | 2008 |
| IBP Projects and Engineering Solutions Ltd | Professional & scientific | 2019 |
| Icetec Training Solutions Limited | Administrative & support | 2011 |
| Ichi Investments Ltd | Financial services | 2024 |
| Icool Limited | Construction | 2009 |
| Ideal Financial Options Ltd | Financial services | 2014 |
| IDK Consulting Ltd | Professional & scientific | 2024 |
| Ikkyu Sushi Ltd | Hospitality | 2022 |
| Illicit Studios Limited | Other services | 2022 |
| Imagine Optical Limited | Wholesale & retail | 2018 |
| IMB Retail Management Limited | Real estate | 1978 |
| IML Building Ltd | Construction | 2015 |
| Imoved Ltd | Real estate | 2024 |
| Independent Coachways Limited | Transport & logistics | 1987 |
| Independent Financial Options Limited | Extraterritorial | 2015 |
| Independent Living Care Company Ltd | Health & social care | 2024 |
| Independent Tax Limited | Professional & scientific | 2015 |
| Infinite Financial Limited | Financial services | 2022 |
| Infinite Wills and Estate Planning Limited | Financial services | 2022 |
| Infinity Detailing Limited | Wholesale & retail | 2022 |
| Infinity Health Labs Ltd | Wholesale & retail | 2025 |
| Infinity Systems (Yorkshire) Ltd | Administrative & support | 2016 |
| Infofrog Limited | Other services | 2014 |
| Innuendo Holdings Ltd | Real estate | 2025 |