| Handyfix Property Services Ltd | Construction | 2022 |
| Happylocal Limited | Hospitality | 1992 |
| Hard Software Limited | Administrative & support | 2007 |
| Hardman Studios Ltd | Information & communication | 2022 |
| Harrier Property Limited | Construction | 2023 |
| Harrison Education and Tutoring Services Limited | Administrative & support | 2020 |
| Harrt Engineering Ltd | Professional & scientific | 2012 |
| Hartley Precision Engineering Co. Limited | Manufacturing | 1984 |
| Headland Design Associates Limited | Professional & scientific | 2003 |
| Health-Access Ltd | Health & social care | 2014 |
| Healthy Facilities Management Ltd | Administrative & support | 2022 |
| Helen Raeburn Limited | Other services | 2015 |
| Henderson Maritime Services Limited | Transport & logistics | 2014 |
| Herby HOG Food Company Ltd | Hospitality | 2020 |
| Heritage Exhibitions Ltd | Professional & scientific | 2025 |
| Heswall Accident Repair Centre Limited | Wholesale & retail | 2015 |
| Heswall Physiotherapy Limited | Health & social care | 2009 |
| HH Engineering Limited | Administrative & support | 2007 |
| Hill Rise Design Limited | Professional & scientific | 2008 |
| Hilsonic Industry Systems Ltd | Administrative & support | 2018 |
| Hmes Limited | Administrative & support | 2016 |
| Hodgson Associates Ltd | Administrative & support | 2014 |
| Hoist UK Limited | Administrative & support | 2006 |
| Holly Design Services Limited | Administrative & support | 2007 |
| Holmes IT Solutions Limited | Professional & scientific | 2014 |
| Home Chapel Ltd | Wholesale & retail | 2022 |
| Home Links Physiotherapy Franchising Ltd | Health & social care | 2025 |
| Hooks Property Limited | Real estate | 2026 |
| Hooks UK Limited | Real estate | 2007 |
| Horner,Downey & Company Limited | Professional & scientific | 2001 |
| Hsmd Ltd | Hospitality | 2024 |
| Hsmd Top Co Ltd | Financial services | 2025 |
| Hub Components Limited | Wholesale & retail | 2024 |
| Hudbu Limited | Extraterritorial | 2010 |
| Hughes & SON Trading Ltd | Wholesale & retail | 2016 |
| Hundred Steps Ltd | Other services | 2020 |
| Hush Management Limited | Professional & scientific | 2023 |
| Hutchinson Marine Services Limited | Transport & logistics | 2012 |
| Hyndburn Engineering Services Limited | Manufacturing | 1999 |
| I.K. Quantity Surveying Limited | Professional & scientific | 2014 |
| IAN W Halliday Limited | Information & communication | 2007 |
| Iceboxauto UK Ltd | Wholesale & retail | 2023 |
| Identity Project Management Limited | Information & communication | 2019 |
| IHM Advisory Limited | Professional & scientific | 2026 |
| Ilets Go Limited | Real estate | 2014 |
| Impact North West Schools Limited | Education | 2022 |
| IN Fitness WE Trust Ltd | Arts & recreation | 2022 |
| IN the Dead Ground Ltd | Wholesale & retail | 2020 |
| Indigo Art Holdings Limited | Manufacturing | 2020 |
| Indigo Art Limited | Manufacturing | 1976 |
| Indigo Management Company (EP) Ltd | Households | 2020 |
| Inertia (UK) Ltd | Administrative & support | 2012 |
| Infiniloop Limited | Professional & scientific | 2026 |
| Infinity 8 Property Ltd | Real estate | 2021 |
| Isla-Lilly Ltd | Arts & recreation | 2022 |
| Itaylored Ltd | Administrative & support | 2017 |
| ITG Digital Designs Ltd | Administrative & support | 2014 |
| J & R Auto Glass Limited | Professional & scientific | 2009 |
| J C Energy Services Ltd | Administrative & support | 2014 |
| J C Heating & Bathrooms (Wirral) Limited | Other services | 2018 |
| J P L Flavour Technologies Limited | Manufacturing | 2014 |
| J. R Property Services Limited | Real estate | 2001 |
| J. S. H. Engineering Services Ltd | Construction | 2013 |
| J.F Mansell Limited | Wholesale & retail | 2025 |
| Jacksons Leisure Supplies Limited | Wholesale & retail | 2004 |
| Jalz Limited | Real estate | 2020 |
| Jamie Long Engineering Ltd | Administrative & support | 2014 |
| Jandrelia Limited | Health & social care | 2026 |
| Jaydon Ltd | Construction | 2017 |
| JBF Group Projects Ltd | Manufacturing | 2003 |
| Jcpr Construction Ltd | Construction | 2018 |
| JDS Pilotage Ltd | Transport & logistics | 2012 |
| Jenjudan UK Limited | Hospitality | 2019 |
| Jenny Harvey Research Limited | Other services | 2018 |
| Jetair Rentals Ltd | Administrative & support | 2010 |
| JF2 Business Services Limited | Administrative & support | 2014 |
| JG Civil Engineering Limited | Professional & scientific | 2007 |
| JH PDR Ltd | Water & waste | 2023 |
| Jimalice Limited | Professional & scientific | 2009 |
| Jj,S Bromborough Ltd | Arts & recreation | 2019 |
| JL Bathrooms & Boilers Ltd | Construction | 2018 |
| Jlbs (Wirral) Limited | Construction | 2013 |
| JLS Distribution Ltd | Wholesale & retail | 2017 |
| JM Design Services Ltd | Professional & scientific | 2024 |
| Jmsp Properties Limited | Real estate | 2025 |
| Joanne Finnerty Recruitment Limited | Administrative & support | 2013 |
| Jones Engineering Limited | Professional & scientific | 2007 |
| Jones London Limited | Information & communication | 2011 |
| JRP Autos Ltd | Wholesale & retail | 2022 |
| JRW Orthopaedics Ltd | Health & social care | 2018 |
| JS Holding Group Ltd | Construction | 2025 |
| JT Ramsey Engineering Limited | Professional & scientific | 2007 |
| Jtki Limited | Construction | 2018 |
| Julian TAI Limited | Financial services | 2010 |
| Jumbuk Digital Ltd | Professional & scientific | 2021 |
| Just Jonathan Ltd | Administrative & support | 2011 |
| JWA Promotions Limited | Information & communication | 2001 |
| JWP Limited | Wholesale & retail | 2000 |
| Jwph (NW) Limited | Construction | 2015 |
| K & G Properties (Wirral) Limited | Real estate | 2017 |