| Humberside Machinery Services Ltd | Manufacturing | 2024 |
| Humberside Marquees Limited | Administrative & support | 2020 |
| Humberside Offshore Training Association | Education | 1987 |
| Humberside Plastics Recycling Ltd | Water & waste | 2016 |
| Humberside Plumbing & Heating Ltd | Construction | 2019 |
| Humberside Power Tools Limited | Hospitality | 2007 |
| Humberside Property Ltd | Real estate | 2020 |
| Humberside PS Limited | Health & social care | 2009 |
| Humberside Scaffolding Ltd | Construction | 2023 |
| Humberside Security Solutions Ltd | Administrative & support | 2022 |
| Humberside Solar Ltd | Construction | 2025 |
| Humberside Steel Fabrications Limited | Construction | 2016 |
| Humberside Surfacing Limited | Construction | 2018 |
| Humberside Training Associates Limited | Education | 2019 |
| Humberside Tyres Limited | Real estate | 1973 |
| Humbertech Control Systems Limited | Construction | 2025 |
| Humbertech Engineering Ltd | Professional & scientific | 2023 |
| Hungryeyez Limited | Hospitality | 2025 |
| Hunslet Roofing (Holdings) Limited | Wholesale & retail | 2021 |
| Hunslet Roofing Supplies Limited | Wholesale & retail | 2005 |
| Hunsley Estates Limited | Real estate | 1971 |
| Hunsley Holdings Limited | Financial services | 2025 |
| Hunt Roofing Solutions Limited | Construction | 2018 |
| Hunter Darcy Estates Ltd | Real estate | 2018 |
| Hunter Pet UK Ltd | Wholesale & retail | 2023 |
| Hunters Contracts North Limited | Administrative & support | 2016 |
| Huntley Management Limited | Wholesale & retail | 1999 |
| Huongdinh Ltd | Real estate | 2024 |
| Hurstcot Limited | Information & communication | 2001 |
| Hurton Audio Ltd | Wholesale & retail | 2022 |
| Husbands Support Services Limited | Agriculture & fishing | 2025 |
| Hush Enterprises Ltd | Arts & recreation | 2025 |
| Hustlers (Hull) Ltd | Arts & recreation | 2012 |
| Hutton & Co (Ships Chandlers) Limited | Transport & logistics | 2000 |
| Hutton Ship Chandlers Holdings Limited | Financial services | 2024 |
| Huxt Contracting Ltd | Construction | 2013 |
| Huxt Properties Limited | Real estate | 2003 |
| Hvac Services Limited | Extraterritorial | 2015 |
| HVO Ltd | Wholesale & retail | 2011 |
| HVV Beauty & Nail Ltd | Other services | 2013 |
| HW Management Services Ltd | Construction | 2026 |
| HWN Aesthetics Ltd | Other services | 2021 |
| HWR Engineering Solutions Ltd | Professional & scientific | 2024 |
| Hyasec Ltd. | Construction | 2013 |
| Hydra Data Systems Limited | Information & communication | 2021 |
| Hydra Supplies Ltd | Wholesale & retail | 2024 |
| Hydracom Limited | Professional & scientific | 2015 |
| Hydrocore (Holdings) Limited | Financial services | 2014 |
| Hydrocore Limited | Manufacturing | 2011 |
| Hygrow Hydroponics Ltd | Wholesale & retail | 2013 |
| Hygrow Limited | Wholesale & retail | 2013 |
| Hyperbaric Welding & Diving Strategies Limited | Construction | 2016 |
| Hytec Developments Limited | Construction | 2013 |
| Hytec Electrical (Hull) Ltd | Wholesale & retail | 1984 |
| Hytec Management Company Limited | Administrative & support | 2017 |
| HZR Motors Ltd | Wholesale & retail | 2025 |
| I & a Holdings Limited | Real estate | 2002 |
| I & B Market Ltd | Wholesale & retail | 2023 |
| I & H Blade Technicians Ltd | Manufacturing | 2025 |
| I AM a Mortgage Broker Ltd | Financial services | 2024 |
| I CAN Handle IT Ltd | Other services | 2009 |
| I L Transport Service Limited | Transport & logistics | 2017 |
| I Like Words Ltd | Information & communication | 2018 |
| I M Commerce Ltd. | Wholesale & retail | 2024 |
| I MED Global Limited | Professional & scientific | 2015 |
| I Mist (Holdings) Limited | Administrative & support | 2016 |
| I Mist Group Limited | Financial services | 2020 |
| I Monelli Ltd | Hospitality | 2024 |
| I P S Planning Ltd | Professional & scientific | 2011 |
| I R Electrical and Supervisory Services Limited | Professional & scientific | 2016 |
| I&Ac Construction Ltd | Construction | 2026 |
| I&Y Style Limited | Wholesale & retail | 2016 |
| I-Datacomms Ltd | Information & communication | 2018 |
| I-Mist Manufacturing Limited | Public administration | 2018 |
| I-Mist Products Limited | Public administration | 2019 |
| I.D.C. Electrical Limited | Construction | 2018 |
| I.M. Leather Craft Ltd | Manufacturing | 2024 |
| IA Brothers Ltd | Hospitality | 2025 |
| Iain Eleanor Limited | Administrative & support | 2017 |
| IAJ Property Limited | Real estate | 2024 |
| IAN Grantham Limited | Health & social care | 2003 |
| IAN Hope Plumbing & Heating Services Limited | Construction | 2016 |
| IAN Peskey Decorations Ltd | Construction | 2026 |
| IANCU88 Ltd | Administrative & support | 2026 |
| IAP Mobility Ltd | Wholesale & retail | 2011 |
| Ibavia Ltd | Wholesale & retail | 2023 |
| Ibbi PVT Ltd | Wholesale & retail | 2025 |
| Ibex Single PLY Systems Ltd | Construction | 2022 |
| IBR Meal Ltd | Hospitality | 2024 |
| IC Domus Limited | Real estate | 2022 |
| IC Properties Ltd | Real estate | 2022 |
| IC Property Management Limited | Extraterritorial | 2024 |
| Icanbake Limited | Wholesale & retail | 2009 |
| Ice Business Limited | Transport & logistics | 2025 |
| Iceberg Hull Limited | Hospitality | 2021 |
| Icecar Limited | Wholesale & retail | 2004 |
| Ichca International Limited | Other services | 2002 |
| Ichi Training Ltd | Education | 2017 |
| Icip Systems Ltd | Information & communication | 2023 |
| Iconflu Limited | Wholesale & retail | 2025 |