| JMD Leisure Limited | Arts & recreation | 2025 |
| JMD Style Items Ltd | Wholesale & retail | 2024 |
| Jmjj Enterprises Ltd | Financial services | 2021 |
| JMR Advanced Practice Ltd | Health & social care | 2016 |
| JMT Psychological Services Ltd | Professional & scientific | 2022 |
| JN Property (NW) Ltd | Real estate | 2022 |
| JNW Holdings Ltd. | Financial services | 2021 |
| JO Gibson Limited | Administrative & support | 2017 |
| Joanne Phoenix Associates Limited | Professional & scientific | 2012 |
| Joanne Stanhope Limited | Professional & scientific | 2012 |
| JOE Gallagher Investments Ltd | Real estate | 2021 |
| JOE MCD Golf Limited | Professional & scientific | 2023 |
| JOH Financial Planning Limited | Financial services | 2014 |
| John Carrington Advisory Limited | Professional & scientific | 2025 |
| John Harding Estates Limited | Real estate | 2017 |
| John Kelly Mechanical Engineering Ltd | Professional & scientific | 2015 |
| John Kelshaw Architects Limited | Professional & scientific | 2020 |
| John King Consulting Limited | Education | 2019 |
| John Mcdonald Ltd | Information & communication | 2026 |
| John Millar (U.K.) Limited | Real estate | 1981 |
| John Morgan Accountants Limited | Professional & scientific | 2020 |
| John Patrick Gale Limited | Professional & scientific | 2024 |
| John Prebble Opticians Limited | Wholesale & retail | 1994 |
| John Richard Security Products (Wirral) Ltd | Wholesale & retail | 1989 |
| John W. Griffith & SON Limited | Administrative & support | 2013 |
| John Wynne Automotive Limited | Wholesale & retail | 2008 |
| Johnson and Boon Limited | Professional & scientific | 2015 |
| Johnson Property & Lettings Limited | Real estate | 2018 |
| Johnston & Scott Jewellery Ltd | Wholesale & retail | 2025 |
| Johnstons Strategy Consultants Ltd | Professional & scientific | 2026 |
| Joints & Points Healthcare Limited | Health & social care | 2007 |
| Joluxe Ltd | Wholesale & retail | 2026 |
| JON David Limited | Real estate | 1981 |
| JON Endeacott Ltd | Professional & scientific | 2009 |
| JON Kenrick Consulting Ltd | Construction | 2026 |
| Jonathan Goodwin (2020) Ltd | Professional & scientific | 2020 |
| Jonathan Goodwin Solicitor Advocate Limited | Professional & scientific | 2012 |
| Jones and Wathen Limited | Construction | 2017 |
| Jones&Co Exterior Cleaning Ltd | Administrative & support | 2026 |
| Jongsen Group Limited | Financial services | 2026 |
| Jonrad Consulting Limited | Professional & scientific | 2019 |
| Jonty Goodchild Consulting Limited | Real estate | 2026 |
| Jordan Black Sports Ltd T/A SJ Black Ltd | Wholesale & retail | 2024 |
| Jordan Pinnock Consultancy Limited | Health & social care | 2024 |
| Jordan Roofing Limited | Construction | 2007 |
| Jorvik Training Limited | Education | 2008 |
| Joseph and Jenkins Hair Ltd | Other services | 2025 |
| Joseph Hairdressing Limited | Other services | 2003 |
| Joseph James (Heswall) Limited | Other services | 2014 |
| Joubert Property Ltd | Real estate | 2021 |
| Jovem Ltd | Other services | 2013 |
| Joven Promise Ltd | Wholesale & retail | 2025 |
| JP Rooney Consultancy Ltd | Administrative & support | 2010 |
| JPB Electrical Installations Ltd | Construction | 2018 |
| JPW International Limited | Construction | 2023 |
| JQ Renewable PPA Consultancy Ltd | Professional & scientific | 2025 |
| Jre.Im Limited | Real estate | 2025 |
| Jrsm Limited | Real estate | 2004 |
| JRV Media Ltd | Information & communication | 2025 |
| JS Civils (NW) Ltd | Construction | 2026 |
| JSC Roofing Ltd | Construction | 2023 |
| JSD Consulting Limited | Administrative & support | 1997 |
| JSI (North West) Ltd | Extraterritorial | 2007 |
| JSL (A&A) Ltd | Administrative & support | 2025 |
| JSL (Liverpool) Ltd | Administrative & support | 2025 |
| Jslr Pipes & Mechanical Ltd | Construction | 2026 |
| JT Chiropractic Limited | Health & social care | 2017 |
| JT Consultancy (NW) Ltd | Professional & scientific | 2019 |
| JT Mount Avenue Ltd | Real estate | 2022 |
| JT Mount Ltd | Real estate | 2023 |
| JTD Management Ltd | Administrative & support | 2024 |
| Jtte Ltd | Financial services | 2025 |
| JU Management Ltd | Administrative & support | 2024 |
| Juliaeats Limited | Hospitality | 2021 |
| Julian Harrison Ltd | Real estate | 2022 |
| Julie Breckon Ltd | Professional & scientific | 2024 |
| Julie's 5 Gems Limited | Other services | 2024 |
| Junction Construction Limited | Construction | 2019 |
| Junction Electrical Limited | Construction | 2018 |
| Jungle Bird Limited | Agriculture & fishing | 2012 |
| Jungle Vision Landscapes Ltd | Administrative & support | 2021 |
| Junket Ltd | Hospitality | 2020 |
| Jupiter BMY Ltd | Wholesale & retail | 2022 |
| Just Jive Ltd | Arts & recreation | 2011 |
| Just Management (UK) Ltd | Real estate | 2010 |
| Just Party 2025 Ltd | Wholesale & retail | 2025 |
| Just Think Consulting Limited | Professional & scientific | 2015 |
| Just Verity's Limited | Wholesale & retail | 2019 |
| Just Wood Furniture Limited | Manufacturing | 2020 |
| Juwei Ltd | Wholesale & retail | 2018 |
| JW Business Consultancy Ltd | Administrative & support | 2011 |
| JW Family Solutions Ltd | Professional & scientific | 2020 |
| JW Property Developments Ltd | Real estate | 2018 |
| JW Roofing Services (NW) Ltd | Construction | 2023 |
| JW Telecom Solutions Limited | Professional & scientific | 2010 |
| JWG Real Estate Limited | Real estate | 2019 |
| JWM Distribution Power Engineering Ltd | Other services | 2024 |
| JYC Trading Limited | Wholesale & retail | 2020 |
| JZC Property Holdings Limited | Real estate | 2017 |
| K & G Garvey Ltd | Hospitality | 2015 |