| Hanas Leather Ltd | Manufacturing | 2025 |
| Handmade Rosettes Limited | Manufacturing | 2014 |
| Handy Home Ings Ltd | Wholesale & retail | 2024 |
| Handy Homes Hull Ltd | Wholesale & retail | 2025 |
| Handy Speedy Limited | Transport & logistics | 2024 |
| Hankali Analytics Limited | Information & communication | 2025 |
| Hannah Chazuka Limited | Health & social care | 2013 |
| Hannckel Group Ltd | Professional & scientific | 2026 |
| Hansom Place Apartments Freehold Management Company Limited | Real estate | 2019 |
| Hanson Jewellers Limited | Wholesale & retail | 2016 |
| Hantom Close (Hull) Management Company Limited | Households | 2018 |
| HAO Nails Ltd | Other services | 2026 |
| Happy Properties Ltd | Real estate | 2018 |
| Happy BEE Properties Ltd | Real estate | 2021 |
| Happy Hannah Ltd | Real estate | 2022 |
| Happy Hound Sitter Ltd | Other services | 2025 |
| Happy House 966 Ltd | Hospitality | 2026 |
| Happy Housing Ltd | Real estate | 2020 |
| Happy Kidz Limited | Other services | 1999 |
| Happy Optimist Ltd | Administrative & support | 2017 |
| Happy Snacks Ltd | Wholesale & retail | 2025 |
| Harafin Ltd | Real estate | 2025 |
| Harby House Ltd | Hospitality | 2024 |
| Harclo Lets Ltd | Households | 2017 |
| Hardaker & SON Limited | Administrative & support | 2014 |
| Hardakers Removal & Storage Limited | Transport & logistics | 1999 |
| Harding Cargo Handling Limited | Transport & logistics | 1991 |
| Hares and Grace Ltd | Wholesale & retail | 2025 |
| Harikiran Pharma CMC Solutions Ltd | Professional & scientific | 2022 |
| Harkins Care Construction Ltd | Construction | 2022 |
| Harkins Care Homes Ltd | Administrative & support | 2021 |
| Harkins Care Intercare Ltd | Health & social care | 2025 |
| Harkins Care Line Ltd | Administrative & support | 2024 |
| Harkins Care Ltd | Health & social care | 2018 |
| Harland Joinery & Maintenance Ltd | Construction | 2023 |
| Harlen Management Ltd | Professional & scientific | 2020 |
| Harlequin Vape Driffield Ltd | Wholesale & retail | 2019 |
| Harman Properties (Hull) Limited | Real estate | 2025 |
| Harmer Holdings (Humberside) Limited | Real estate | 2025 |
| Harmony's Holdings Ltd | Wholesale & retail | 2025 |
| Harratts Limited | Wholesale & retail | 1987 |
| Harratts M1 Limited | Wholesale & retail | 1993 |
| Harratts of Wakefield Limited | Wholesale & retail | 1996 |
| Harrington & Hughes Limited | Administrative & support | 2024 |
| Harris Family Fisheries Ltd | Hospitality | 2025 |
| Harrison Garage Limited | Wholesale & retail | 2025 |
| Harrison Morrod Limited | Wholesale & retail | 2025 |
| Harrison Safety Ltd | Wholesale & retail | 2024 |
| Harrison Solway Holdings Limited | Financial services | 2020 |
| Harrison Solway Logistics Limited | Transport & logistics | 2000 |
| Harrison Solway Property Limited | Real estate | 2025 |
| Harrison Wind Services Ltd | Manufacturing | 2025 |
| Harrison's of Hull Limited | Professional & scientific | 2017 |
| Harro Group Holdings Limited | Financial services | 2025 |
| Harro Holdings Limited | Financial services | 2020 |
| Harro Limited | Manufacturing | 1999 |
| Harrod Electrical Ltd | Construction | 2023 |
| Harroquip Pump Systems Limited | Extraterritorial | 2014 |
| Harry's Fish and Chips Limited | Hospitality | 2025 |
| Harshi Wickrama Ltd | Wholesale & retail | 2022 |
| Hartleys Construction Ltd | Construction | 2020 |
| Hartoft Food Ltd | Hospitality | 2024 |
| Harts Services Ltd | Construction | 2017 |
| Harvelli Limited | Construction | 2009 |
| Harvind Limited | Health & social care | 2017 |
| Harwood and Somerville Courts Management Company Limited | Real estate | 1985 |
| Haryad Car Wash Ltd | Administrative & support | 2026 |
| HAS Consult PL Limited | Professional & scientific | 2025 |
| HAS Media Ltd | Information & communication | 2015 |
| Hasbo Holdings Ltd | Manufacturing | 2018 |
| Hase Common Management Company Limited | Households | 1999 |
| Hasp PCN Ltd | Health & social care | 2022 |
| Haste Management Limited | Other services | 2021 |
| Hata Ventures Ltd | Wholesale & retail | 2024 |
| Hathaway 1 Limited | Construction | 2024 |
| Hathaway 2 Limited | Construction | 2024 |
| Hathaway 3 Limited | Construction | 2024 |
| Hathaway 4 Limited | Construction | 2024 |
| Hathaway 5 Limited | Construction | 2024 |
| Hathaway 6 Limited | Construction | 2025 |
| Hathaway Land & Planning Limited | Construction | 2024 |
| Hathaway Projects Limited | Construction | 2024 |
| Hathersage Roofing Limited | Construction | 2025 |
| Hattershulll Ltd | Hospitality | 2025 |
| Hauetz Ltd | Wholesale & retail | 2025 |
| Haus of Sausage Ltd | Agriculture & fishing | 2026 |
| Haven 6 Stays Ltd | Real estate | 2026 |
| Haven Basin Land Company Limited | Real estate | 2023 |
| Haven Day Nursery Ltd | Health & social care | 2022 |
| Haven Healthcare Limited | Administrative & support | 2024 |
| Haven Stride (UK) Ltd | Health & social care | 2021 |
| Havenco Properties Ltd | Households | 2025 |
| Havenlyx Limited | Wholesale & retail | 2026 |
| Hawkesbury Resources Ltd | Professional & scientific | 2024 |
| Haworth Park Sports Club Ltd | Hospitality | 2023 |
| Hawthorn Management Consulting Ltd | Professional & scientific | 2023 |
| Hawthorn Timber Group Limited | Financial services | 2021 |
| Hawthorn Timber Limited | Manufacturing | 1964 |
| Hawthorne French Polishing Limited | Other services | 2024 |
| Hayat Express Plus Ltd | Hospitality | 2026 |