| Hemming Vincent LLP | | 2009 |
| Hemsley-Levack Project Consultants Limited | Construction | 2013 |
| Hemsworth Holdings Ltd | Construction | 2026 |
| Hendry Electrical Contractors Limited | Construction | 1991 |
| Heneage Market Ltd | Wholesale & retail | 2025 |
| Henry Stewart & Co. Limited | Agriculture & fishing | 1993 |
| Heppells Chocolatier Patissier Ltd | Manufacturing | 2018 |
| Hera Coaching Ltd | Education | 2016 |
| Hereco Facilities Maintenance Limited | Administrative & support | 2018 |
| Heritage Kitchen Prep Ltd | Wholesale & retail | 2025 |
| Heritage Window Co North Thoresby Limited | Construction | 2003 |
| Hermione Bridal Limited | Wholesale & retail | 2023 |
| Hermione Collection Ltd | Wholesale & retail | 2015 |
| Hermione Prom Limited | Wholesale & retail | 2023 |
| Herrywhitney Global Limited | Wholesale & retail | 2026 |
| Hersey Security Ltd | Administrative & support | 2021 |
| Hewins & Goodhand,Limited | Transport & logistics | 1915 |
| Hewitt & Company Limited | Financial services | 2012 |
| Hewitt Associates Ltd | Other services | 2016 |
| HEX Codes and Ginger Tea Ltd | Information & communication | 2017 |
| HEX Development Ltd | Construction | 2022 |
| HFW Services Ltd | Manufacturing | 2019 |
| HGV 1 Driver Hire Ltd | Transport & logistics | 2024 |
| HGV Truck Parts Limited | Wholesale & retail | 2015 |
| HH Cleaning Services Limited | Administrative & support | 2026 |
| HH Technical Services Ltd | Professional & scientific | 2023 |
| Hi-Tide PUB Management Ltd | Hospitality | 2022 |
| Hidden Hotspot Tanning Salon Ltd | Hospitality | 2021 |
| Hierophant EDD Limited | Professional & scientific | 2024 |
| Higgins Builders Limited | Construction | 1997 |
| Higgins Haulage Limited | Transport & logistics | 2009 |
| Higgs Lifts Ltd | Construction | 2018 |
| Highcliffe (Cleethorpes) Management Company Limited | Real estate | 2002 |
| Higher Level LP | | 2014 |
| Highfeature Limited | Information & communication | 2017 |
| Highfield International Limited | Other services | 2023 |
| Highfield Solar Limited | Real estate | 2024 |
| Highgate Trading (UK) Ltd | Real estate | 1995 |
| Highline Safety Ltd | Other services | 2025 |
| Hill & Standard Student Property Management Ltd | Administrative & support | 2014 |
| Hill Project Management Services Ltd | Professional & scientific | 2013 |
| Hill Property Group Limited | Real estate | 2021 |
| Hillcrest Park Properties Limited | Real estate | 2016 |
| Hillrise House Limited | Real estate | 2013 |
| Hills Construction & Engineering Ltd | Construction | 2024 |
| Hillside Homecare Services Limited | Health & social care | 2026 |
| Hindu Cultural Society Grimsby | Other services | 2012 |
| Hipp-E Limited | Extraterritorial | 2014 |
| Hirst Engineering Services Limited | Professional & scientific | 2020 |
| Hirst Newsflash Retail Limited | Wholesale & retail | 2025 |
| HIS (Lincs) Limited | Professional & scientific | 2022 |
| Hjfm Limited | Real estate | 2012 |
| HJP Electrical Services Limited | Construction | 2018 |
| HJT Construction Ltd | Construction | 2018 |
| HLC Studio Ltd | Real estate | 2025 |
| Hlcw Limited | Transport & logistics | 2023 |
| HLR Property Management Ltd | Real estate | 2023 |
| HLW Jets Ltd | Administrative & support | 2024 |
| HM Wind Services Limited | Construction | 2019 |
| HMB Offshore Safety Ltd | Construction | 2026 |
| HMI Group Ltd | Information & communication | 2022 |
| HNJ Group Ltd | Real estate | 2026 |
| Hnna Ltd. | Professional & scientific | 2003 |
| Hodgson International Ltd | Other services | 2017 |
| Hoffman and Brewer Limited | Manufacturing | 2023 |
| Hogan Property and Lettings Ltd | Real estate | 2025 |
| Hogwood Joinery & Building Ltd | Construction | 2024 |
| Holden Contractors Limited | Administrative & support | 2003 |
| Holdsworth Homes (Grimsby) Ltd | Real estate | 2021 |
| Holistic Approach Professionals Limited | Administrative & support | 2014 |
| Holistically Normal Limited | Health & social care | 2026 |
| Holls Kitchen Ltd | Hospitality | 2024 |
| Holly Clyburn Golf Limited | Arts & recreation | 2013 |
| Holly Creatives Ltd | Administrative & support | 2025 |
| Holmefresh Limited | Hospitality | 2019 |
| Holmegarth Limited | Financial services | 2016 |
| Holmes Bio-Tech Ltd | Professional & scientific | 2018 |
| Holson Properties Limited | Real estate | 2022 |
| Holton Chippy Limited | Administrative & support | 2006 |
| Holton Controls Limited | Manufacturing | 2010 |
| Holton Dental Medical Services Ltd | Health & social care | 2024 |
| Holton LE Clay Cars Ltd | Wholesale & retail | 2024 |
| Holton Management Company Limited | Real estate | 1984 |
| Holton-Le-Clay Garage Limited | Wholesale & retail | 1990 |
| Holton-Le-Clay Multi-Purpose Educational Resource Centre | Extraterritorial | 2012 |
| Holyoake Joinery Ltd | Construction | 2015 |
| Home Heating Services Grimsby Ltd | Construction | 2023 |
| Home Hive Services Ltd | Construction | 2026 |
| Home Renovations (Lincs) Limited | Construction | 2022 |
| Homes by Humphrey Ltd | Manufacturing | 2023 |
| Homes by Verdi Ltd | Construction | 2025 |
| Honest Security Ltd | Administrative & support | 2024 |
| Hono Healthcare Ltd | Other services | 2016 |
| HOOF4U Ltd | Wholesale & retail | 2014 |
| Hoohaadesign Limited | Wholesale & retail | 2019 |
| Hopco Estates Ltd | Households | 2025 |
| Hopkins Transport Ltd | Transport & logistics | 2007 |
| Horecma Limited | Administrative & support | 2013 |
| Horizon Home and Travel Ltd | Real estate | 2024 |
| Horizon Lettings Limited | Real estate | 2009 |