| Handtrans (Investments) Limited | Financial services | 2022 |
| Hatfield Transport Services Ltd | Wholesale & retail | 2015 |
| Henpire Limited | Professional & scientific | 2015 |
| Henrik MAC Inspection Services Ltd | Construction | 2023 |
| Herco International (UK) Limited | Administrative & support | 1993 |
| High Definition Arts Limited | Information & communication | 2013 |
| HMB & SON Ltd | Transport & logistics | 2024 |
| Home Flooring Ltd | Wholesale & retail | 2019 |
| House Fittings UK Ltd | Wholesale & retail | 2026 |
| HSF Fresh Logistics Limited | Extraterritorial | 2022 |
| HSF Logistics (UK) Limited | Transport & logistics | 2001 |
| HSF Newco Limited | Extraterritorial | 2022 |
| Hudson & Rhodes Limited | Manufacturing | 2025 |
| Hugh James Acquisitions Ltd | Real estate | 2019 |
| Hugh James Construction Ltd | Construction | 2019 |
| Huisman Limited | Professional & scientific | 2008 |
| Humber Inspection (International) Limited | Mining & quarrying | 1996 |
| Humber Inspection Services Limited | Other services | 1994 |
| Humber Key Investments Ltd | Real estate | 2022 |
| Humber Ports Holding Limited | Financial services | 2013 |
| Humber Ports Logistics Limited | Transport & logistics | 2012 |
| Humberside Electrical and Instrumentation Limited | Professional & scientific | 2011 |
| Humberside Sunblinds Limited | Manufacturing | 1999 |
| Hunt Companies Limited | Financial services | 2024 |
| Hunt Engineering Ltd | Manufacturing | 2022 |
| Hunt Property Investment Group Limited | Real estate | 2024 |
| IBI82 Limited | Transport & logistics | 2018 |
| Ileg Business Services Limited | Administrative & support | 2013 |
| IM Rowson Electrical Limited | Construction | 2016 |
| Immingham Barber Salon Ltd | Other services | 2025 |
| Immingham Best One Ltd | Wholesale & retail | 2025 |
| Immingham Hardware & Locksmith Services Ltd | Wholesale & retail | 2021 |
| Immingham Lorry Park Ltd | Transport & logistics | 2012 |
| Immingham Town Football Club CIC | Education | 2021 |
| Immingham Wasps Rugby League Football Club Limited | Arts & recreation | 2011 |
| Impact Group Services Limited | Administrative & support | 2015 |
| Industrial Freezer Services Holdings Limited | Financial services | 2023 |
| Infinited Tedy Ltd | Transport & logistics | 2020 |
| Insite Farms UK Ltd | Agriculture & fishing | 2020 |
| Inspired Kitchens and Bathrooms Ltd | Construction | 2019 |
| Intermodal Logistics Services Ltd | Transport & logistics | 2013 |
| Interseas Shipstores Limited | Transport & logistics | 1980 |
| Ishtar Solutions Ltd | Professional & scientific | 2018 |
| IT Lincs Limited | Manufacturing | 2013 |
| IVI78 Ltd | Transport & logistics | 2017 |
| IVO Transport Ltd | Real estate | 2006 |
| IVON26 Ltd | Transport & logistics | 2017 |
| J and S Burger & Shakes Ltd | Hospitality | 2025 |
| J C Plant Limited | Construction | 1999 |
| J D Payroll Services Ltd | Hospitality | 2024 |
| J Dean Services Ltd | Administrative & support | 2017 |
| J H Solutions (Grimsby) Ltd | Other services | 2014 |
| J Wilkes Engineering Ltd | Administrative & support | 2019 |
| J&K Haulage Ltd | Transport & logistics | 2015 |
| J'S Burger and Shakes Ltd | Hospitality | 2024 |
| J'S Immingham Takeaway Ltd | Hospitality | 2026 |
| J.C.Lea Engineering Ltd | Information & communication | 2009 |
| JA Plastics Ltd | Water & waste | 2019 |
| Jakita’S Kitchen Ltd | Hospitality | 2021 |
| Jamar Liner Agencies Limited | Transport & logistics | 1987 |
| Jamar Shipping Limited | Extraterritorial | 2000 |
| Jamie Leskiewicz Ltd | Construction | 2019 |
| Janusz Godlewski Ltd | Transport & logistics | 2022 |
| JCA Agricultural Services Limited | Agriculture & fishing | 2021 |
| JET Tech Industrial Solutions Ltd | Administrative & support | 2019 |
| JGR Electrical Ltd | Construction | 2015 |
| Jhony Ionut Limited | Transport & logistics | 2023 |
| JMV Logistics Limited | Transport & logistics | 2024 |
| John Cory Limited | Transport & logistics | 2004 |
| John Stronach (Shipbrokers) Limited | Professional & scientific | 2004 |
| JS Lloyds Pharma Ltd | Wholesale & retail | 2023 |
| JSW Garage Limited | Wholesale & retail | 2016 |
| JTW Haulage Ltd | Transport & logistics | 2025 |
| JVS Property Ltd | Real estate | 2016 |
| K&B Property Letting & Renovations Limited | Real estate | 2025 |
| Kalrad Services Ltd | Transport & logistics | 2013 |
| Karek Trans Ltd | Transport & logistics | 2017 |
| Katie Sauvage Accountancy Services Ltd | Professional & scientific | 2020 |
| Kempton Security Limited | Administrative & support | 2009 |
| Keskin 3D Printers Ltd | Manufacturing | 2025 |
| KEV Spedition Ltd | Transport & logistics | 2019 |
| King's Developments Limited | Construction | 2016 |
| Kjgl Offshore Services Ltd | Construction | 2025 |
| KJT Automotive Services Limited | Wholesale & retail | 2018 |
| Kmjc Limited | Manufacturing | 2026 |
| KMR Turbine Technicians Limited | Construction | 2018 |
| KNZ Logistics Ltd | Transport & logistics | 2024 |
| Kosta Trans Limited | Transport & logistics | 2020 |
| Kostovi Ltd | Transport & logistics | 2014 |
| KP Valeting Services Limited | Other services | 2014 |
| Krasi Trans Ltd | Transport & logistics | 2014 |
| KRIS1313 Ltd | Transport & logistics | 2023 |
| Krisi 71 Limited | Transport & logistics | 2022 |
| KTL Pubs Limited | Hospitality | 2026 |
| L & a Houses Limited | Real estate | 2020 |
| L E Solutions (Lincs) Ltd | Professional & scientific | 2025 |
| L&S Bodyshop Ltd | Professional & scientific | 2019 |
| L.J.H Landscape & Tree Services Ltd | Administrative & support | 2021 |
| Lake Bookings Limited | Information & communication | 2018 |
| Langness Management Services Limited | Professional & scientific | 1987 |