| HML Recycling Limited | Water & waste | 2009 |
| Hofbauer (U.K.) Limited | Wholesale & retail | 1986 |
| Hoff Investments Ltd | Financial services | 2017 |
| Holden's Digital Consulting Limited | Information & communication | 2024 |
| Holdings & Holdings Ltd | Real estate | 2024 |
| Holdings of Oswaldtwistle Limited | Extraterritorial | 1985 |
| Holgate Distributions Ltd | Wholesale & retail | 2024 |
| Holgates Drainage Ltd | Water & waste | 2024 |
| Holmes & Sons Limited | Extraterritorial | 1995 |
| Home Build & Design Ltd | Construction | 2026 |
| Home Sweet Home Assured Ltd | Real estate | 2024 |
| HOME4CCTV Ltd | Administrative & support | 2021 |
| Homes for Humanity | Health & social care | 2017 |
| Honeyberry Manufacturing Ltd | Administrative & support | 2026 |
| Hong Kong Travel Ltd | Information & communication | 2009 |
| Hong Sheng Food Ltd | Hospitality | 2024 |
| Hope & Brown Limited | Wholesale & retail | 2001 |
| Hormount Limited | Extraterritorial | 2018 |
| Horwich Cleaning Centre Ltd | Other services | 2015 |
| Hotzo Ltd | Manufacturing | 2019 |
| Houlker’S Art Ltd | Arts & recreation | 2023 |
| House of Clarity Ltd | Wholesale & retail | 2022 |
| House of Madness Ltd | Professional & scientific | 2025 |
| House of Techs Limited | Wholesale & retail | 2022 |
| Housing Investors Ltd | Real estate | 2022 |
| Howards Property Maintenance Limited | Administrative & support | 2006 |
| Hoyle & Dean (Holdings) Limited | Transport & logistics | 2014 |
| Hoyle & Dean Limited | Transport & logistics | 1955 |
| HPM Groundworks Ltd | Administrative & support | 2022 |
| HRA Private Hire Ltd | Transport & logistics | 2025 |
| HRL Plumbing and Heating Ltd | Construction | 2022 |
| HS4 Solutions Limited | Construction | 2026 |
| HTX Horizons Ltd | Wholesale & retail | 2024 |
| Hubble Money Ltd | Administrative & support | 2019 |
| Huckleberry Digital Limited | Information & communication | 2024 |
| Hughes & Sons Builders Ltd | Construction | 2024 |
| Hughes Automation Ltd | Professional & scientific | 2021 |
| Human Shields Security Services Ltd | Administrative & support | 2026 |
| Huncoat Railway Limited | Hospitality | 2026 |
| Huncoat UTD JFC C.I.C. | Arts & recreation | 2026 |
| Huncoat Village Store Ltd | Wholesale & retail | 2021 |
| Hussain a Limited | Hospitality | 2023 |
| Hustlemania Records Ltd | Arts & recreation | 2025 |
| Hybrids Ltd | Administrative & support | 2026 |
| Hyde Artists Ltd | Information & communication | 2022 |
| Hydraglow Ltd | Health & social care | 2025 |
| Hydro @ the Barn Limited | Arts & recreation | 2013 |
| Hydroking Ltd | Administrative & support | 2025 |
| Hyndburn Carpets Limited | Wholesale & retail | 2014 |
| Hyndburn District Talking Newspaper | Other services | 2005 |
| Hyndburn Energy Ltd | Other services | 2019 |
| Hyndburn Health Partnership Ltd | Households | 2019 |
| Hyndburn Hope Initiative CIC | Education | 2024 |
| Hyndburn Leisure | Arts & recreation | 2001 |
| Hyndburn News Group Limited | Wholesale & retail | 2025 |
| Hyndburn Paxton Ltd | Wholesale & retail | 2013 |
| Hyndburn Plumbing and Heating Services Limited | Construction | 2002 |
| Hyndburn Property Investments Limited | Real estate | 2025 |
| Hyndburn Voluntary & Community Resource Centre Ltd. | Hospitality | 2004 |
| Hyndburn Wellbeing Initiative CIC | Arts & recreation | 2025 |
| HZ Foods International Ltd | Hospitality | 2026 |
| I Care Lancashire Limited | Health & social care | 2019 |
| I Khan Garage Ltd | Wholesale & retail | 2024 |
| I T F X Limited | Professional & scientific | 1999 |
| I Whittaker Decor Services Limited | Construction | 2005 |
| I.K Services (NW) Limited | Health & social care | 2014 |
| IAN Grimshaw Coaches Limited | Transport & logistics | 1999 |
| IAN Hyatt Transport Limited | Transport & logistics | 2005 |
| IAN Mason School Improvement Ltd | Professional & scientific | 2025 |
| IAN Whitworth Consulting Ltd | Professional & scientific | 2024 |
| Ians Barber Shop Ltd | Other services | 2025 |
| Ibex Tech Ltd | Wholesale & retail | 2025 |
| IC Jason Rhodes Limited | Information & communication | 2009 |
| Ice Ritual Jewels Ltd | Wholesale & retail | 2025 |
| ICP Direct Limited | Manufacturing | 2014 |
| IDC Architecture Ltd | Professional & scientific | 2024 |
| IDC Creations Ltd | Construction | 2016 |
| IDC Home Architecture Ltd | Professional & scientific | 2025 |
| IDC Projects Ltd | Construction | 2022 |
| Ideal PUB Company (Lancs) Limited | Administrative & support | 2003 |
| Ideas in Motion Limited | Extraterritorial | 2012 |
| Idle Women Community Interest Company | Arts & recreation | 2015 |
| Ifit Sports Ltd | Information & communication | 2015 |
| Ignition Locksmiths Limited | Transport & logistics | 2006 |
| IHS Assets Limited | Real estate | 2026 |
| IHS Estates Limited | Real estate | 2024 |
| IIA Health Ltd | Health & social care | 2022 |
| Ijaz & Amin UK Company Limited | Information & communication | 2026 |
| IJK Textiles Ltd | Professional & scientific | 2023 |
| Ikorus Limited | Professional & scientific | 2020 |
| Illuzion Events Ltd | Hospitality | 2024 |
| Ilra Ltd | Professional & scientific | 2023 |
| Image Hair and Nails Limited | Other services | 2009 |
| Imsims Ltd | Wholesale & retail | 2025 |
| IN Style Joinery and Furniture Ltd | Manufacturing | 2019 |
| Inatube Drinks Ltd | Extraterritorial | 2011 |
| Inco Commercial Cleaning Service Limited | Administrative & support | 2025 |
| Independent Investigations Ltd | Administrative & support | 2023 |
| INDIGO23 Technical Services LLP | | 2013 |
| Individual Technology Solutions Ltd | Other services | 2021 |