| J D Property (Liverpool) Limited | Real estate | 2016 |
| J D Tiling Ltd | Construction | 2018 |
| J Derbyshire Consultancy Limited | Information & communication | 2003 |
| J Dunne Investments Limited | Real estate | 2025 |
| J Edwards Limited | Real estate | 2002 |
| J Edwards Waste Management Limited | Water & waste | 2006 |
| J Enterprise Ltd | Wholesale & retail | 2020 |
| J F Morton Limited | Professional & scientific | 2024 |
| J G Studio Limited | Other services | 2008 |
| J Greenhalgh Limited | Administrative & support | 2012 |
| J H S Projects & Construction Ltd | Construction | 2009 |
| J Hackley Investments Ltd | Real estate | 2025 |
| J Hargreaves Services Limited | Construction | 2015 |
| J Holden Services Limited | Transport & logistics | 2019 |
| J J Mcintyre Civils Limited | Construction | 2018 |
| J K Farm Industrial Limited | Manufacturing | 2019 |
| J K Marketing Services Ltd | Professional & scientific | 2023 |
| J L Wolfe Services Limited | Transport & logistics | 2019 |
| J M Car Sales Limited | Wholesale & retail | 2007 |
| J Marsh Joinery Limited | Construction | 2026 |
| J Mcgrath Media (UK) Ltd | Professional & scientific | 2018 |
| J Mills Properties (NW) Ltd | Real estate | 2023 |
| J Murphy Ductwork Limited | Construction | 2015 |
| J Music Supreme Limited | Education | 2017 |
| J N MGT Limited | Professional & scientific | 2022 |
| J N Paintings Limited | Arts & recreation | 2007 |
| J N R Leasing Limited | Administrative & support | 2012 |
| J Neild Brickwork Ltd | Construction | 2016 |
| J P Bainbridge Ltd | Transport & logistics | 2025 |
| J P Clayton Ltd | Construction | 2020 |
| J P Mcmillan Haulage Limited | Transport & logistics | 2018 |
| J Phillips (Grab & Tipper Hire) Limited | Administrative & support | 2016 |
| J Powley Building Services Limited | Construction | 2026 |
| J R Bowling (Engineering) Limited | Wholesale & retail | 1983 |
| J R Bowling (Holdings) Limited | Financial services | 2019 |
| J R Groundwork Limited | Construction | 2014 |
| J R M Corporate Travel Ltd | Administrative & support | 2022 |
| J Redman Services Limited | Other services | 2026 |
| J Rees Services Limited | Other services | 2014 |
| J Robinson Property Management Limited | Real estate | 2022 |
| J S FRY Ltd | Professional & scientific | 2012 |
| J S Harrison Holdings Ltd | Professional & scientific | 2016 |
| J S Liftrucks Ltd | Manufacturing | 2013 |
| J S Pipeline Services Limited | Construction | 2017 |
| J S Taylor Engineering Limited | Professional & scientific | 2004 |
| J Sutcliffe (Bolton) Ltd | Construction | 2020 |
| J W and Whewell Limited | Real estate | 2022 |
| J W Cleaning Services Limited | Administrative & support | 2011 |
| J W Morris Decorators Ltd | Construction | 2010 |
| J Welsby Limited | Wholesale & retail | 2015 |
| J Worthington Group Ltd | Professional & scientific | 2019 |
| J&A Logistics Ltd | Transport & logistics | 2023 |
| J&B Steel Fabrications Ltd | Manufacturing | 2021 |
| J&D Roofing Contractors Ltd | Construction | 2025 |
| J&Dwallace Consultancy Limited | Professional & scientific | 2019 |
| J&J Tames Limited | Wholesale & retail | 2016 |
| J&K Convenience (Bolton) Ltd | Wholesale & retail | 2024 |
| J&L Lettings (Lancashire) Limited | Real estate | 2017 |
| J&M Memorabilia Ltd | Arts & recreation | 2024 |
| J&R Autos (Blackrod) Ltd | Wholesale & retail | 2025 |
| J&R Enterprises (Kearsley) Ltd | Administrative & support | 2020 |
| J&S Hair Co Limited | Other services | 2015 |
| J&V Homes Letting Ltd | Real estate | 2026 |
| J&Z Goods Ltd | Wholesale & retail | 2023 |
| J. & L. Property (Lancashire) Limited | Professional & scientific | 2007 |
| J. D. Consultancy Limited | Professional & scientific | 1981 |
| J. Higham Limited | Construction | 2003 |
| J. T. Sports Limited | Wholesale & retail | 2002 |
| J.A. Tyre Services Limited | Wholesale & retail | 2012 |
| J.A.F Ventilation Services Limited | Construction | 2021 |
| J.A.T Law Limited | Professional & scientific | 2022 |
| J.Appleton Transport Ltd | Transport & logistics | 2026 |
| J.Dickinson & Sons (Holdings) Limited | Professional & scientific | 2010 |
| J.Dickinson & Sons (Property) Limited | Construction | 2010 |
| J.Dickinson & Sons(Horwich)Limited | Water & waste | 1939 |
| J.Drive Ltd | Wholesale & retail | 2025 |
| J.E.H. Plumbing & Heating Limited | Construction | 2020 |
| J.J. Mullins (Civil Engineering) Limited | Construction | 1996 |
| J.J.Tideswell Ltd | Transport & logistics | 2025 |
| J.M. Property Maintenance Ltd | Manufacturing | 2021 |
| J.M. Refrigeration Limited | Manufacturing | 2001 |
| J.O GAS Services Limited | Construction | 2003 |
| J.R. Whitehead 2000 Limited | Wholesale & retail | 1998 |
| J.T. & M. Rigby (Bolton) Limited | Real estate | 1979 |
| J.T.B Electrical Ltd | Construction | 2017 |
| J1 Contractors Ltd | Transport & logistics | 2026 |
| J1 Investments Ltd | Real estate | 2023 |
| JA Change Ltd | Wholesale & retail | 2025 |
| JA CNC Solutions Ltd | Information & communication | 2024 |
| JA Protection Ltd | Financial services | 2025 |
| JA Renovations Building Contractors Limited | Construction | 2019 |
| JA Twigg Properties Ltd | Real estate | 2025 |
| Ja.Kaiser Limited | Administrative & support | 2026 |
| Jabberwocky Projects Ltd | Information & communication | 2022 |
| Jack Bayliss Holdings Limited | Information & communication | 2020 |
| Jack Beech Limited | Arts & recreation | 2024 |
| Jack Bowen Limited | Administrative & support | 2021 |
| Jackdaw Properties Ltd | Real estate | 2020 |
| Jackie Casey Limited | Professional & scientific | 2021 |
| Jackl Construction Limited | Construction | 2023 |