| Goldfinch Industries Limited | Extraterritorial | 2011 |
| Gough & Davy Limited | Wholesale & retail | 2007 |
| Gpwer Limited | Health & social care | 2024 |
| Graphic Power Limited | Manufacturing | 2002 |
| Greek Tastes 4 ALL Ltd | Wholesale & retail | 2015 |
| Green Agricultural Services Ltd | Agriculture & fishing | 2021 |
| Green Solution Yorkshire Limited | Construction | 2020 |
| Greennexis Ltd | Extraterritorial | 2024 |
| Greens Property Solutions Limited | Real estate | 2023 |
| Grey Ghost UK Limited | Hospitality | 2009 |
| GSN Electrical Limited | Construction | 2022 |
| GW Solutions Hull Limited | Households | 2024 |
| H I S Property Group Ltd | Real estate | 2025 |
| Habby Business Limited | Wholesale & retail | 2024 |
| Hallgate Fruit & Vegetables Limited | Wholesale & retail | 2022 |
| Hallgate Holdings Limited | Financial services | 2026 |
| Hallgate Landscapes Ltd | Administrative & support | 2012 |
| Hallgate Properties (Hull) Ltd | Administrative & support | 2020 |
| Hanbeck Homes Limited | Real estate | 2023 |
| Hannan Brickwork Ltd | Construction | 2025 |
| Harramy's Bar & Restaurant Limited | Hospitality | 2018 |
| Harraway Law Limited | Professional & scientific | 2017 |
| Harrisons Property (Hull) Limited | Real estate | 2019 |
| Hartley Groundworks Limited | Construction | 2025 |
| Harts Plumbing and Heating Ltd | Construction | 2017 |
| Hauran Engineering Ltd | Professional & scientific | 2024 |
| Haus of Ants Group Limited | Professional & scientific | 2026 |
| HD Building East Yorkshire Ltd | Construction | 2023 |
| HD Homes East Yorkshire Ltd | Real estate | 2024 |
| HD Maintenance East Yorkshire Ltd | Construction | 2023 |
| HD Tooling Ltd | Manufacturing | 2009 |
| HDT Pharma Consulting Limited | Professional & scientific | 2013 |
| Health Inc. Imaging Limited | Health & social care | 2025 |
| Health Inc. Limited | Health & social care | 2011 |
| Heathen Technology Limited | Manufacturing | 2014 |
| Heathercote Limited | Professional & scientific | 2026 |
| Heimat Textil Limited | Wholesale & retail | 2018 |
| Helperfirst Ltd | Administrative & support | 2023 |
| Hensla Insure & Protect Ltd | Financial services | 2024 |
| Herbert Harrison and Sons Limited | Agriculture & fishing | 1948 |
| Hestia Investments Limited | Real estate | 2016 |
| Hexagon Paradigm Ltd | Professional & scientific | 2026 |
| Heyucreative Ltd | Manufacturing | 2023 |
| Highfields Golf Ltd | Arts & recreation | 2019 |
| HL Marine Ltd | Professional & scientific | 2024 |
| HMA Investment Property Ltd | Real estate | 2024 |
| HMD Accounting Ltd | Professional & scientific | 2024 |
| Holden Powell Limited | Professional & scientific | 2023 |
| Home Estates Lettings Limited | Real estate | 2015 |
| Home Estates Limited | Real estate | 2007 |
| Home for Tea Ltd | Hospitality | 2021 |
| Home Renew Hull Ltd | Real estate | 2015 |
| Homelink Maintenance Limited | Construction | 2023 |
| Hornsea Funeral Services Ltd | Other services | 2025 |
| House of Chloec Ltd | Other services | 2024 |
| Houses 4 Homes (Hull) Limited | Real estate | 2016 |
| Housing Compliance Ltd | Professional & scientific | 2026 |
| HOW2COBOT Ltd | Professional & scientific | 2025 |
| HU13 Plumbing and Heating Ltd | Construction | 2022 |
| Hull and Humber Drain Services Limited | Administrative & support | 2023 |
| Hull Carpets & Flooring Limited | Construction | 2005 |
| Hull City Property Services Limited | Households | 2026 |
| Hull Test Centre Limited | Extraterritorial | 1981 |
| Hull Travel Services Limited | Transport & logistics | 2019 |
| Human Resources Interim and Consultancy Services Limited | Professional & scientific | 2004 |
| Humber Assets Ltd | Hospitality | 2014 |
| Humber Builders Ltd | Households | 2009 |
| Humber Events Limited | Hospitality | 2019 |
| Humber Llamas Limited | Agriculture & fishing | 2026 |
| Humber Tattoo Limited | Other services | 2021 |
| Humberside Homelink Limited | Real estate | 2003 |
| Humberside Lettings Limited | Real estate | 2022 |
| Humberside Living Ltd | Real estate | 2026 |
| Humberside Metal Collectors Limited | Water & waste | 2021 |
| Humberside Plant Hire Ltd. | Construction | 1990 |
| Humberside Radiology Ltd | Education | 2024 |
| Hya.Fix (GAS & Plumbing Services) Limited | Wholesale & retail | 2018 |
| Hydratech Hydraulic Engineering Limited | Construction | 2013 |
| Hykke Ltd | Wholesale & retail | 2018 |
| I D Grantham Electrical Services Ltd | | 2013 |
| I Rawlinson Plumbing & Heating Limited | Construction | 2019 |
| IAN Black Limited | Wholesale & retail | 2023 |
| ICS (2112) Limited | Information & communication | 2007 |
| IGN Beverage Group Ltd | Financial services | 2024 |
| IGN Capital Limited | Administrative & support | 2015 |
| IGN Investment Group Limited | Administrative & support | 2020 |
| Ikonic-Uk Ltd | Wholesale & retail | 2016 |
| IKP Trading Limited | Wholesale & retail | 2013 |
| Image Tiling Limited | Construction | 2025 |
| Imoteka Limited | Hospitality | 2001 |
| Impact HGV Logistics Limited | Transport & logistics | 2024 |
| IN 3 (UK) Limited | Administrative & support | 2008 |
| Ingenious I.T Limited | Information & communication | 2001 |
| Inglis Construction Group Ltd | Construction | 2020 |
| Inglis Property Solutions Ltd | Real estate | 2023 |
| Inn at Home Ltd | Wholesale & retail | 2014 |
| Insite Power Limited | Construction | 2018 |
| Instamod Site Services Ltd | Construction | 2019 |
| Integra Space Limited | Construction | 2007 |
| Integrated HSE Solutions Ltd | Professional & scientific | 2018 |