| Hampton Place (Cleveleys) Management Company Limited | Households | 1993 |
| Hamsul Limited | Real estate | 2017 |
| Hancox Building Services Limited | Construction | 2025 |
| Hancox Building Solutions Ltd | Construction | 2024 |
| Happy Gathering Blackpool Ltd | Hospitality | 2025 |
| Haraton Property Investments Limited | Real estate | 2015 |
| Hargreaves Engineering Group Limited | Financial services | 2023 |
| Harifa Freight Ltd | Transport & logistics | 2026 |
| Hause Rentals Ltd | Real estate | 2025 |
| Hawthorn Property and Lettings Limited | Real estate | 2016 |
| Hazelgreen Homes Limited | Real estate | 2025 |
| HB & Co Retail Ltd | Wholesale & retail | 2026 |
| Healthecon Limited | Professional & scientific | 2024 |
| Heaney Properties Ltd | Real estate | 2023 |
| Herbs & Tandoori Ltd | Hospitality | 2025 |
| Hewitt Safe & Lock Services Limited | Wholesale & retail | 2007 |
| Heywood Organisation Ltd | Hospitality | 2024 |
| Hidden Emergency Ltd | Information & communication | 2025 |
| Hidey BOO Limited | Wholesale & retail | 2016 |
| Higgihaus Serviced Accommodation (Lansdown Place) Ltd | Real estate | 2023 |
| Higginson Property Solutions Limited | Real estate | 2015 |
| High Integrity Obsolescence Limited | Professional & scientific | 2026 |
| High Integrity Systems Ltd. | Professional & scientific | 2015 |
| Highams Garage Limited | Wholesale & retail | 2022 |
| Highcroft Care Holdings Ltd | Real estate | 2016 |
| Highland Commissioning Services Ltd | Construction | 2024 |
| Hill Vale Property Development Limited | Real estate | 2016 |
| Hire a Hawk UK Ltd | Agriculture & fishing | 2021 |
| Hire Sales & Testing Solutions Limited | Administrative & support | 2017 |
| HJW Electrical Limited | Energy | 2019 |
| HLS Automotive Ltd | Manufacturing | 2019 |
| HLS Supplies Ltd | Wholesale & retail | 2016 |
| Hocking’S Property Holdings Ltd | Real estate | 2024 |
| Holden Electrical Services Limited | Construction | 2005 |
| Holmefield Holdings Ltd | Administrative & support | 2023 |
| Home Furnishers Ltd. | Wholesale & retail | 2012 |
| Home Quarters (Property) Limited | Professional & scientific | 2012 |
| Home With Heart Ltd | Wholesale & retail | 2025 |
| Hooke Design & Marketing Limited | Professional & scientific | 2012 |
| Hooper Developments Ltd | Real estate | 2026 |
| Hope Property Limited | Real estate | 2017 |
| Horizon UK Property Group Ltd | Real estate | 2022 |
| Hospitality Product Solutions Limited | Wholesale & retail | 2024 |
| Household and Garden Products Ltd | Wholesale & retail | 2024 |
| Hove 14 Management Limited | Professional & scientific | 2014 |
| HP Developments (U.K) Ltd | Real estate | 2021 |
| HST1965 Limited | Financial services | 2023 |
| Hunt Building Services (Northwest) Limited | Construction | 2012 |
| Hunt Family Trading Ltd | Wholesale & retail | 2023 |
| Hush (Urban Lounge) Limited | Hospitality | 2018 |
| Hydrofix Wetrooms and Plumbing Ltd | Construction | 2025 |
| HYP Investment Limited | Real estate | 2018 |
| HYP3RLETE Ltd | Wholesale & retail | 2025 |
| Hypa Labs Ltd | Information & communication | 2026 |
| Iamo Assets Limited | Real estate | 2018 |
| IBO Barber Ltd | Other services | 2022 |
| Idiom Studios Ltd | Arts & recreation | 2021 |
| Idwtrading Ltd | Wholesale & retail | 2025 |
| Ignite Fire Compliance Ltd | Professional & scientific | 2025 |
| IHL Consultancy Limited | Transport & logistics | 2017 |
| Illuma One Electronics Limited | Manufacturing | 2006 |
| Impulse Style Ltd | Wholesale & retail | 2017 |
| IN 2 the Red Ltd | Extraterritorial | 2019 |
| Inclusive Futures Ltd. | Health & social care | 2024 |
| Industrial Access Specialists Ltd | Construction | 2017 |
| Industrial Processes Automation Services Ltd | Energy | 2021 |
| Infinity Property Group Limited | Real estate | 2014 |
| Inflightuk Ltd | Wholesale & retail | 2025 |
| Ingram International Management Limited | Professional & scientific | 2024 |
| INK Print Solutions Ltd | Manufacturing | 2007 |
| Inkon Ltd | Wholesale & retail | 2025 |
| Instad Mechanical Limited | Construction | 2026 |
| Intelecs Lighting Solutions Limited | Professional & scientific | 2013 |
| International Child Protection Advisors Limited | Professional & scientific | 2014 |
| International Events Ltd | Administrative & support | 2020 |
| Interventure Capital 21 Limited | Financial services | 2021 |
| Interventure Capital 23 Limited | Financial services | 2023 |
| Investment Property Ltd | Real estate | 2017 |
| Ironstone House Limited | Real estate | 2010 |
| Ironstone Recruitment Ltd | Administrative & support | 2021 |
| Isadale Limited | Agriculture & fishing | 2016 |
| Isadale Marine Services Ltd | Agriculture & fishing | 2019 |
| Izamol Limited | Financial services | 2025 |
| J & F Drainage Limited | Water & waste | 2014 |
| J a Dickens Limited | Construction | 2015 |
| J Alderson FS Limited | Financial services | 2026 |
| J G Builders (NW) Ltd | Construction | 2017 |
| J Gallagher Builders Ltd | Construction | 2019 |
| J Latus Holdings Ltd | Administrative & support | 2025 |
| J Shuttleworth Ltd | Professional & scientific | 2019 |
| J'S Direct Electrics Limited | Wholesale & retail | 2010 |
| J.A Custom Interiors Limited | Construction | 2025 |
| J.C. Ramskill Limited | Construction | 2001 |
| J.D.Hughes Roofing Services Limited | Construction | 2025 |
| Jackpot Noodles Limited | Information & communication | 2015 |
| Jacob Alxndr Limited | Other services | 2016 |
| JAF Consultants Ltd | Professional & scientific | 2025 |
| Jagota Belle Limited | Real estate | 2023 |
| James Garnett Foundation | Other services | 2024 |
| Jamiesons Construction Ltd | Construction | 2019 |