| Home Vetcare Limited | Professional & scientific | 2016 |
| Homebrew Bottleshop Oxton Limited | Wholesale & retail | 2022 |
| Homebrew TAP Crosby Limited | Hospitality | 2022 |
| Homebrew TAP Franchise Limited | Wholesale & retail | 2019 |
| Homebrew TAP Frodsham Limited | Hospitality | 2021 |
| Homebrew TAP Hoole Limited | Hospitality | 2020 |
| Homebrew TAP Stockton Heath Limited | Hospitality | 2024 |
| Hope Homes PVT Ltd | Real estate | 2025 |
| Horizon Bay Gifts Ltd | Wholesale & retail | 2022 |
| Horizon Representation Ltd | Professional & scientific | 2026 |
| Horizon Roof Services Limited | Construction | 2025 |
| Host Coffee Limited | Manufacturing | 2023 |
| House of Anya Limited | Wholesale & retail | 2025 |
| HSA - Hillsborough Survivors Support Alliance CIC | Other services | 2019 |
| HST (NW) Limited | Transport & logistics | 2026 |
| Huge Architects Limited | Professional & scientific | 2010 |
| Hunter Engineering Consultancy Ltd | Professional & scientific | 2026 |
| Hwilliams Ltd | Wholesale & retail | 2023 |
| Hyjetnic Ltd | Administrative & support | 2020 |
| IAN Pugh Security Consultancy Ltd | Administrative & support | 2020 |
| Icon Power Consultants Limited | Professional & scientific | 2009 |
| Igloo Creative Agency Ltd | Other services | 2012 |
| IJ Mcardle Legal Services Limited | Professional & scientific | 2024 |
| Ilmana Locum Servies Limited | Wholesale & retail | 2019 |
| Immortal Advertising Limited | Professional & scientific | 2014 |
| Impact Science Ltd | Professional & scientific | 2011 |
| Infinite Wellness Travel Ltd | Administrative & support | 2026 |
| Inishail Limited | Professional & scientific | 2009 |
| Inka at Flawless Ltd | Other services | 2025 |
| Innovation Futures Ltd | Health & social care | 2025 |
| Inscot Management Company Limited | Real estate | 2005 |
| Inspiring Minds Learning Centre Limited | Education | 2026 |
| Intabene Consulting Limited | Professional & scientific | 2021 |
| Intabene Management Company (Birkenhead) Limited | Hospitality | 1979 |
| Intelligent by Design Ltd | Professional & scientific | 2025 |
| Inveresk Court Management Company Limited | Hospitality | 1978 |
| Invictus Air Limited | Construction | 2023 |
| IO Nutrition Ltd | Health & social care | 2025 |
| Ipebble Limited | Information & communication | 2009 |
| Ipebble Properties Limited | Real estate | 2021 |
| J K Wharton Limited | Construction | 2025 |
| J Rhodes Construction Ltd | Construction | 2018 |
| Jagharah Limited | Real estate | 2024 |
| Jameson Lynds Ltd | Construction | 2017 |
| Jamie Lynch Consulting Limited | Information & communication | 2017 |
| Janapar Limited | Hospitality | 2002 |
| Janice Murray Limited | Transport & logistics | 2016 |
| Japanese Abacus and Mental Arithmetic (Jama) UK Ltd | Education | 2016 |
| JB Renewables Ltd | Professional & scientific | 2024 |
| JBJ Building Projects & Renovations Ltd | Construction | 2025 |
| JBR Imperium Ltd | Wholesale & retail | 2022 |
| Jcia Ltd | Construction | 2014 |
| JD Goodwin Consultants Ltd | Professional & scientific | 2023 |
| JDR Design Solutions Limited | Professional & scientific | 2023 |
| Jeeva Ltd | Real estate | 2026 |
| JEM Infosec Limited | Information & communication | 2009 |
| Jemb Property Ltd | Real estate | 2024 |
| Jemica Limited | Wholesale & retail | 2012 |
| Jenna Downing Limited | Arts & recreation | 2016 |
| Jessica Jones Private Travel Ltd | Administrative & support | 2025 |
| JJ Electricals (Wirral) Ltd | Construction | 2025 |
| JJ Stoves and Flues Ltd | Construction | 2026 |
| Jlel Property Services Ltd | Real estate | 2026 |
| JMG Independent Ltd | Administrative & support | 2015 |
| JOE Mulvey Software Contracting Ltd | Extraterritorial | 2021 |
| John Buckle Ltd | Manufacturing | 2012 |
| John Stephen Machell Ltd | Construction | 2025 |
| Johnson Controls Hvac Ltd | Energy | 2026 |
| Josephine LEE Social Work Solutions Limited | Health & social care | 2015 |
| Jotoni Properties Ltd | Real estate | 2026 |
| JPB Projects Ltd | Professional & scientific | 2025 |
| JPD Property Management LLP | | 2011 |
| JRH Joinery& Building Services Ltd | Manufacturing | 2021 |
| JS Clinical Aesthetics Ltd | Health & social care | 2025 |
| Jsjinspections Ltd | Professional & scientific | 2022 |
| JT Testing Limited | Professional & scientific | 2017 |
| Jukesmc Ltd | Professional & scientific | 2025 |
| Julie Merry Safeguarding & Education Services Ltd | Administrative & support | 2017 |
| K&L Kitchens & Bedrooms Ltd | Manufacturing | 2010 |
| Kaizen Consultancy & Training Services Limited | Professional & scientific | 1998 |
| Kane & Able Developments Ltd | Real estate | 2026 |
| Kane and Able Developments Ltd | Construction | 2011 |
| Kaujama Digital Ltd | Wholesale & retail | 2025 |
| KCL Interior Fitout Consultancy Ltd | Professional & scientific | 2021 |
| Kean and Co. Limited | Professional & scientific | 2013 |
| Keenforce Limited | Wholesale & retail | 1985 |
| Keloth Limited | Health & social care | 2025 |
| Kenn ECS Ltd. | Professional & scientific | 2017 |
| Kevin Mighall Coaching Limited | Other services | 2022 |
| Keystone Connected Consultancy Ltd | Professional & scientific | 2025 |
| Kimberford Associates Limited | Real estate | 1984 |
| King Property Solutions Ltd | Real estate | 2025 |
| Klub Artefakt Ltd | Professional & scientific | 2020 |
| KMW (NW) Ltd | Professional & scientific | 2025 |
| Know Motion Ltd | Wholesale & retail | 2012 |
| Konquest Joinery Developments Ltd | Construction | 2023 |
| KPS Engage Limited | Information & communication | 2023 |
| Krbl Consulting Limited | Professional & scientific | 2023 |
| Kzcr Ltd | Financial services | 2020 |
| L&O Associates Ltd | Professional & scientific | 2022 |