| IO Communications Ltd | Professional & scientific | 2005 |
| IPL (D&B) Group Limited | Administrative & support | 2020 |
| IPL Design and Build Limited | Administrative & support | 2009 |
| Iqbal Khan Ltd | Real estate | 2021 |
| Irlam Road Day Nursery Limited | Education | 2010 |
| Iron GUT Publishing Limited | Information & communication | 2007 |
| Irony Holdings Ltd | Financial services | 2024 |
| Isco Nominees Limited | Professional & scientific | 1997 |
| ISG Partnership Limited | Wholesale & retail | 2008 |
| IT & Change Limited | Manufacturing | 2014 |
| IT Jobs Watch Ltd | Information & communication | 1994 |
| Iulia Transport Ltd | Transport & logistics | 2024 |
| IVY Court (Sandiway) Management Company Limited | Real estate | 1988 |
| J & H Draughting Services Limited | Administrative & support | 2007 |
| J & M Inertial Navigation Limited | Manufacturing | 2006 |
| J & S Accessories Limited | Wholesale & retail | 1991 |
| J & S Doncaster Properties Limited | Real estate | 2019 |
| J & S Group Holdings Limited | Financial services | 2019 |
| J & S Retail Properties Holdings Limited | Real estate | 2019 |
| J & S Retail Properties Limited | Real estate | 2019 |
| J a Harvey Limited | Real estate | 2021 |
| J B Consulting (Cheshire) Ltd | Professional & scientific | 2015 |
| J B New 80 Ltd | Wholesale & retail | 2023 |
| J E Darlington Holdings Limited | Professional & scientific | 2025 |
| J Gildea Ltd | Financial services | 2014 |
| J J Fresh Cook Limited | Hospitality | 2018 |
| J Key Consulting Limited | Professional & scientific | 2025 |
| J M W Projects Limited | Agriculture & fishing | 2011 |
| J Mcsorley Ltd | Health & social care | 2022 |
| J Moore Builders Limited | Construction | 2011 |
| J P Ceramics Limited | Construction | 2009 |
| J Rathbone Windows & Doors Ltd | Construction | 2018 |
| J S Legal Accounting Services Limited | Professional & scientific | 2006 |
| J Seddon Electrical Contractors Northwich Limited | Construction | 2016 |
| J Sharples Property Investments Ltd | Real estate | 2019 |
| J T Consulting Limited | Professional & scientific | 1998 |
| J W Leadwork Ltd | Construction | 2021 |
| J&D Draughting Services Limited | Professional & scientific | 2023 |
| J&K Hansen Ltd | Real estate | 2011 |
| J&S Doncaster Holdings Ltd | Financial services | 2024 |
| J&S Group Properties Ltd | Real estate | 2024 |
| J. W. a. a. Holdings Ltd | Real estate | 2024 |
| J.D. Automotive ( Northwich ) Ltd | Wholesale & retail | 2007 |
| J.J.Bubs Ltd | Real estate | 2026 |
| J.Jonescomedy Ltd | Arts & recreation | 2025 |
| J.M Security Integration and Design Ltd | Administrative & support | 2023 |
| J.O.T. Limited | Health & social care | 2008 |
| J.P.Moores & Co.(Sandiway)Limited | Wholesale & retail | 1948 |
| J.Stubbs Groundworks Ltd | Construction | 2021 |
| Jack Faint Ltd | Arts & recreation | 2025 |
| Jack GEE (Cycles) Limited | Professional & scientific | 2016 |
| Jacks Consulting Limited | Administrative & support | 2022 |
| Jagan Embedded Ltd | Information & communication | 2013 |
| Jagisodo Ltd | Real estate | 2019 |
| Jahanzaib Ramzan Limited | Wholesale & retail | 2026 |
| James D Butler Limited | Information & communication | 2010 |
| James Eats Ltd | Hospitality | 2019 |
| James Haggarty Building Technologies Group Limited | Financial services | 2012 |
| James Ross Physiotherapy Limited | Health & social care | 2025 |
| James Thomas Motorsport Engineering Ltd | Wholesale & retail | 2024 |
| Jane Mullen Speech Therapy Ltd. | Health & social care | 2015 |
| Janet ANN Ltd | Wholesale & retail | 2017 |
| Janeway PIE Limited | Information & communication | 2024 |
| Jaro K Transport Ltd | Transport & logistics | 2018 |
| Jarrod & Sons Ltd | Wholesale & retail | 2025 |
| Jasp Planning Consultancy Limited | Professional & scientific | 2017 |
| Javin Newcombe Architects Limited | Professional & scientific | 2002 |
| JAY Hale Associates Limited | Professional & scientific | 2000 |
| Jayace Limited | Administrative & support | 1991 |
| Jbsrentals Ltd | Real estate | 2025 |
| JCB Properties Limited | Real estate | 2016 |
| JCB59 Limited | Professional & scientific | 2019 |
| JCE Capital Investments Ltd | Financial services | 2021 |
| JD Commercial Services Limited | Construction | 2015 |
| Jdcr Investments Limited | Extraterritorial | 2020 |
| JDK Property Solutions Ltd | Real estate | 2025 |
| Jeanette Jones Spa and Leisure Consultancy Limited | Professional & scientific | 2016 |
| Jeba Homes Ltd | Real estate | 2025 |
| Jefford Aesthetics Ltd | Other services | 2024 |
| Jellco Propco Ltd | Real estate | 2025 |
| Jenics Limited | Real estate | 1998 |
| JES Ceilings Limited | Construction | 2023 |
| Jess Right Ltd | Information & communication | 2026 |
| Jest Properties Limited | Real estate | 2000 |
| JF & L Services Ltd | Transport & logistics | 2017 |
| JFK Associates (UK) Limited | Manufacturing | 2002 |
| Jfls Holdings Limited | Financial services | 2023 |
| JFM Workplace Ltd | Administrative & support | 2020 |
| JG Gardening and Landscaping Limited | Construction | 2025 |
| JG Scott & Sons Ltd | Agriculture & fishing | 2017 |
| Jgfp Media Ltd | Information & communication | 2021 |
| Jgregson Ltd | Construction | 2021 |
| JH Property 25 Limited | Real estate | 2025 |
| JIA Living Limited | Real estate | 2026 |
| Jicleaning Ltd | Administrative & support | 2022 |
| Jise I.T. Limited | Information & communication | 2009 |
| JJK Marketing Ltd | Professional & scientific | 2019 |
| JK Advisory Partners Limited | Professional & scientific | 2026 |
| Jk-Ellah Ltd | Wholesale & retail | 2026 |
| JLC Construction (Cheshire) Ltd | Construction | 2017 |