| Hroi Partners Ltd | Transport & logistics | 2025 |
| Htshepherd Electrical Ltd | Construction | 2024 |
| Hughes Coastal Properties Ltd | Real estate | 2023 |
| Humber Asset Holdings Ltd | Hospitality | 2026 |
| Humber PUB Limited | Hospitality | 2024 |
| Humber View Apartments Limited | Hospitality | 2021 |
| Humber Wind Tech Limited | Manufacturing | 2017 |
| Humberside Apartments Ltd | Real estate | 2026 |
| Humberside Gear Co Limited | Manufacturing | 2003 |
| Humberside Land Developers Limited | Real estate | 1970 |
| Hybrid Fightwear Ltd | Manufacturing | 2025 |
| Hyde Joinery Ltd | Construction | 2021 |
| I B Services Louth Limited | Transport & logistics | 2013 |
| I C Insulations Limited | Other services | 2007 |
| I V Kostova Limited | Health & social care | 2011 |
| I.N.S. Semiconductor Support Ltd. | Construction | 2018 |
| Iain Hamilton Limited | Arts & recreation | 2005 |
| IAN Sanderson Safety and Training Ltd | Other services | 2015 |
| IAN Stenton Windows Limited | Construction | 2007 |
| ICF (Grimsby) Limited | Manufacturing | 1981 |
| ICREPAIRS123 Ltd | Construction | 2026 |
| Immingham & District Estate Agents Limited | Real estate | 1995 |
| Improve Your Home DO IT Wright Limited | Construction | 2012 |
| Independent Industrial Resources Ltd | Other services | 2007 |
| Independent Laundry Solutions Limited | Transport & logistics | 2021 |
| Industrial Bags and Covers Ltd | Manufacturing | 2014 |
| Industrial Servicing Limited | Manufacturing | 2011 |
| Indygo Ltd | Professional & scientific | 2014 |
| Injury Management Clinic Ltd | Health & social care | 2023 |
| INK Stars Printing Limited | Manufacturing | 2025 |
| Innermark Ltd | Information & communication | 2026 |
| Innotech Specialists Limited | Professional & scientific | 2012 |
| Inside OUT Property Developments Ltd | Construction | 2024 |
| Insideout Business Group Ltd | Administrative & support | 2026 |
| Inspection Consultation Ltd | Construction | 2025 |
| Intelligent Light Limited | Wholesale & retail | 2012 |
| Interior Refit & Decorators Ltd | Construction | 2026 |
| Ipc-Gy Limited | Manufacturing | 2024 |
| Itpl Solutions Limited | Professional & scientific | 2012 |
| J & H Investments Limited | Real estate | 2022 |
| J & J Motor Group Ltd | Wholesale & retail | 2026 |
| J CAL Developments Limited | Real estate | 2023 |
| J CAL Trading Limited | Real estate | 2021 |
| J D Lettings Limited | Real estate | 2018 |
| J Fleming Electricals Ltd | Construction | 2018 |
| J Grayson Properties Ltd | Real estate | 2023 |
| J Green Technical Services Ltd | Construction | 2023 |
| J Horton Roofing Ltd | Construction | 2017 |
| J Roberts Services UK Ltd | Construction | 2018 |
| J&B Snooker Limited | Hospitality | 2025 |
| J&L Housing Limited | Real estate | 2021 |
| J. Byatt Joinery Contractors Limited | Construction | 2005 |
| J. Hunter Technical Services Limited | Hospitality | 2016 |
| J.N.R's Processing Limited | Manufacturing | 2018 |
| JAD Build Limited | Construction | 2026 |
| JAD Utilities Limited | Construction | 2022 |
| Jadestone Property Maintenance Ltd | Construction | 2026 |
| JAM Photo Limited | Professional & scientific | 2015 |
| Jam's News Limited | Wholesale & retail | 2003 |
| Jamal's Cleethorpes Limited | Hospitality | 2025 |
| James Boyd Corporate Travel Services Ltd | Transport & logistics | 2004 |
| James Dean Plumbing Solutions Ltd | Construction | 2019 |
| James Senior Bespoke Tiling Limited | Construction | 2020 |
| JAN Woods Social Care Limited | Education | 2008 |
| Janboy Ltd | Professional & scientific | 2026 |
| JAY Blackburn Property Services Limited | Construction | 2007 |
| JBX Creative Ltd | Professional & scientific | 2025 |
| JDP Auto Ltd | Wholesale & retail | 2023 |
| JDW Associates Limited | Other services | 2018 |
| Jehms Properties Ltd | Real estate | 2024 |
| Jenny & SON Limited | Construction | 2022 |
| JFA Property Developments Ltd | Real estate | 2024 |
| JGC Catering Limited | Hospitality | 2024 |
| JH Ward Ltd | Mining & quarrying | 2025 |
| JLA Sensory Ltd | Education | 2021 |
| JLB Racing Ltd | Arts & recreation | 2018 |
| JLB Services Ltd | Professional & scientific | 2017 |
| Jlfr Ltd | Administrative & support | 2014 |
| Jljm Services Ltd | Other services | 2023 |
| JLS Property Limited | Real estate | 2016 |
| JM LIU Services Limited | Wholesale & retail | 2025 |
| JM Storage Solutions Limited | Administrative & support | 2021 |
| JMB ENG Limited | Professional & scientific | 2022 |
| Joev Solutions Ltd | Professional & scientific | 2019 |
| John Loughery Ltd | Transport & logistics | 2018 |
| JOM Engineering Limited | Professional & scientific | 2023 |
| Jones and Sons Construction Ltd | Professional & scientific | 2016 |
| Jonny Donuts & Olivers Eatery Limited | Hospitality | 2012 |
| Joshua Devaney Services Ltd | Manufacturing | 2026 |
| Jossy Ltd | Wholesale & retail | 2025 |
| JPK Logistic Ltd | Transport & logistics | 2017 |
| JPN (Roofing & Cladding) Limited | Construction | 2010 |
| JRH Retreats Limited | Hospitality | 2025 |
| JRM Offshore Solutions Limited | Professional & scientific | 2025 |
| Jsmr Limited | Extraterritorial | 2017 |
| Jwmp Global Ltd | Wholesale & retail | 2025 |
| K & N Carpet Services Limited | Other services | 2010 |
| K P Henderson Limited | Professional & scientific | 2026 |
| K S S Electrical Ltd | Construction | 2014 |
| K. Newsum Properties Limited | Real estate | 2004 |