| Horizon Academy Trust | Education | 2013 |
| Horizon Building and Glazing (Yorkshire) Limited | Construction | 2022 |
| Horizon Estates Hull Ltd | Real estate | 2025 |
| Horizon Haven Estates Ltd | Real estate | 2025 |
| Horizon Tattoo Ltd | Wholesale & retail | 2026 |
| Horner International Ltd | Administrative & support | 2009 |
| Horners Quarter Management Limited | Real estate | 2018 |
| Hornsea Cottages Limited | Real estate | 2023 |
| Hornsea Healthcare Limited | Wholesale & retail | 2024 |
| Horton Establishments Ltd | Education | 2000 |
| Horton Holmes Limited | Real estate | 2015 |
| Hospital in Home Limited | Administrative & support | 2010 |
| Hospitality Apps Limited | Information & communication | 2015 |
| Hot Pack International Limited | Manufacturing | 2017 |
| Hot Pizza Hull Limited | Hospitality | 2026 |
| Hotspot Cafe Limited | Hospitality | 2026 |
| HOTTUBS4SALE.ONLINE Limited | Other services | 2021 |
| Houlton York Limited | Construction | 2001 |
| Hounviotech Limited | Information & communication | 2025 |
| Hourne Flats Association Limited | Households | 1981 |
| House of Barber Hull Ltd | Other services | 2026 |
| House of Barbers (Central) Limited | Other services | 2021 |
| House of Bronte Ltd | Hospitality | 2023 |
| House of INK Limited | Other services | 2021 |
| House of Izakaya Ltd | Hospitality | 2023 |
| House of Lashes and Brows Ltd | Other services | 2021 |
| House of Pizza (Hull) Limited | Hospitality | 2024 |
| House of V Ltd | Wholesale & retail | 2014 |
| House R US Limited | Real estate | 2024 |
| Houseoftuyi Ltd | Wholesale & retail | 2024 |
| Houses to Homes Hull Ltd | Real estate | 2025 |
| Howard Pubs 22 Limited | Hospitality | 2023 |
| Howdale (Hull) Management Company Limited | Households | 1982 |
| Howe Property Group Limited | Real estate | 2026 |
| Howley Compliance Solutions Ltd | Professional & scientific | 2019 |
| Howling Hospitality Ltd | Hospitality | 2026 |
| HPC Solutions Ltd | Professional & scientific | 2026 |
| Hpcs (Hull) Limited | Wholesale & retail | 2007 |
| HPM Drinks Ltd | Wholesale & retail | 2019 |
| Hpss (Group) Limited | Manufacturing | 2004 |
| Hpss Limited | Manufacturing | 2002 |
| HQT5 Ltd | Construction | 2023 |
| HR Glow Tanning Studio Limited | Other services | 2025 |
| HRC Environmental Services Ltd | Administrative & support | 2013 |
| HRL Graphics Ltd | Professional & scientific | 2024 |
| HRU Garden Supplies Ltd | Wholesale & retail | 2015 |
| HRU Property Investments Ltd | Households | 2025 |
| Hryf Developments Ltd | Real estate | 2026 |
| HS AIM Ltd | Professional & scientific | 2022 |
| HS Group Hull Ltd | Construction | 2024 |
| HS Offshore Services Ltd. | Construction | 2022 |
| HS Wilson Consulting Limited | Professional & scientific | 2024 |
| HSN 06 Limited | Hospitality | 2012 |
| HSN 08 Limited | Real estate | 2012 |
| HSN 10 Limited | Real estate | 2012 |
| HT Peate Limited | Transport & logistics | 2017 |
| HTA (Humber) Limited | Other services | 2019 |
| HTS Management Unlimited | Real estate | 2019 |
| HU Bolt Ltd | Wholesale & retail | 2026 |
| HU Developments Limited | Construction | 2023 |
| HU Flooring Ltd | Construction | 2025 |
| HU Loans Ltd | Financial services | 2015 |
| HU Motors Hull Limited | Wholesale & retail | 2025 |
| HU Pitch Care Ltd | Construction | 2026 |
| HU Plumbing Ltd | Construction | 2023 |
| HU Travel Ltd | Transport & logistics | 2022 |
| HU. Properties Limited | Real estate | 2016 |
| HU1 Living Limited | Real estate | 2017 |
| HU3 Corner 1 Limited | Wholesale & retail | 2025 |
| HU3 Nail Salon Limited | Other services | 2014 |
| HU3 Phones Limited | Manufacturing | 2023 |
| HU5 Food Ltd | Wholesale & retail | 2026 |
| Hubbnet Ltd | Information & communication | 2017 |
| Hubfar Ltd | Transport & logistics | 2026 |
| Hudcourt Ltd | Hospitality | 2026 |
| Hudgell (Property) Limited | Health & social care | 2017 |
| Hudgell Group Ltd | Financial services | 2022 |
| Hudgell Property Holdings Ltd | Financial services | 2022 |
| Hudson Business Services Limited | Administrative & support | 2008 |
| Hudson Charles Ltd | Construction | 2023 |
| Hugh Rice (Beverley) Limited | Wholesale & retail | 2000 |
| Hugh Rice (Whitefriargate) Limited | Wholesale & retail | 2006 |
| Hugh Rice Holdings Limited | Wholesale & retail | 2015 |
| Hugh Rice Limited | Wholesale & retail | 1986 |
| Hugh Rice Production Limited | Administrative & support | 2006 |
| Hughes & Cooke Investments Ltd | Construction | 2024 |
| Hugocathy World Ltd | Manufacturing | 2025 |
| Hugwan Limited | Professional & scientific | 2020 |
| Hull & East Riding Amateur Athletic Company,Limited(The) | Arts & recreation | 1920 |
| Hull & East Yorkshire Anaesthetic Syndicate (Hull) Ltd | Real estate | 2023 |
| Hull & East Yorkshire Anaesthetic Syndicate Ltd | Health & social care | 2021 |
| Hull & East Yorkshire Community Money Advice CIC | Administrative & support | 2017 |
| Hull & East Yorkshire Training & Consultancy Limited | Professional & scientific | 2023 |
| Hull & Humber Driver Training Centre Ltd | Education | 2020 |
| Hull - K Removals & Storage Limited | Transport & logistics | 2016 |
| Hull 4 Heroes Developments Limited | Construction | 2024 |
| Hull 4 Heroes Veterans Village Operations Limited | Construction | 2024 |
| Hull Accident Repair Centre Ltd | Wholesale & retail | 2018 |
| Hull Accountancy Limited | Professional & scientific | 2013 |
| Hull Active Schools CIC | Education | 2020 |