| Iwne Limited | Information & communication | 2024 |
| Iyaofans Limited | Information & communication | 2023 |
| Izaca Construction Ltd | Construction | 2025 |
| J & B Skip Services Ltd | Water & waste | 2011 |
| J & E Dynamics Ltd | Professional & scientific | 2023 |
| J & E Renovations Limited | Construction | 2006 |
| J & G Landscapes Ltd | Professional & scientific | 2015 |
| J & K Rowland Limited | Hospitality | 2014 |
| J & M Services (Cheshire) Limited | Construction | 2006 |
| J & S (Northwest) Limited | Construction | 2022 |
| J & S Farmery Services Ltd | Real estate | 2021 |
| J & S Trans European Ltd | Transport & logistics | 2006 |
| J & T Rapid LLP | | 2011 |
| J & W Associates (Cheshire) Ltd | Administrative & support | 2011 |
| J & W Production Limited | Construction | 2024 |
| J a B Design Services Limited | Professional & scientific | 2007 |
| J a Dvorak Ltd | Professional & scientific | 2016 |
| J a Ford Consulting Limited | Administrative & support | 2025 |
| J and J Holdings (Wigan) Ltd | Real estate | 2020 |
| J B Planning Services Limited | Administrative & support | 2012 |
| J B Sports Coaching Limited | Arts & recreation | 2015 |
| J Bartley Safety and Engineering Ltd | Professional & scientific | 2025 |
| J Braddock Limited | Administrative & support | 2016 |
| J Brand Capital Limited | Administrative & support | 2026 |
| J Brenson Consulting Limited | Administrative & support | 2024 |
| J Cocking Consultants Ltd | Professional & scientific | 2013 |
| J Costa Engineering Ltd | Wholesale & retail | 2018 |
| J Cowell Ltd | Wholesale & retail | 2023 |
| J D Mills Property Ltd | Real estate | 2023 |
| J Dillon Brickwork Limited | Construction | 2026 |
| J Doherty Limited | Professional & scientific | 2017 |
| J E Business Limited | Professional & scientific | 2018 |
| J Edwards Technical Solutions Limited | Administrative & support | 2011 |
| J Feather Software Engineering Limited | Information & communication | 2017 |
| J Finegan Ltd | Hospitality | 2022 |
| J Flynn Builders Limited | Construction | 2019 |
| J G Engineering Consulting Limited | Administrative & support | 2016 |
| J H Donald (Retail) Limited | Administrative & support | 2002 |
| J H Electrical Contractors Limited | Construction | 2023 |
| J H Financial Solutions Ltd | Financial services | 2011 |
| J James Engineering Limited | Administrative & support | 2023 |
| J K Building Services Ltd | Construction | 2018 |
| J K Engineering Limited | Administrative & support | 2018 |
| J L Industrial Doors Ltd | Construction | 2024 |
| J L Lettings Limited | Real estate | 2017 |
| J Lees Management Limited | Administrative & support | 2023 |
| J Lewis Logistics Limited | Other services | 2016 |
| J M D Electrical North West Ltd | Construction | 2020 |
| J M I Limited | Real estate | 2019 |
| J M Planning Services Ltd | Professional & scientific | 2021 |
| J Mcwhinney Limited | Administrative & support | 2013 |
| J P R M Properties Limited | Real estate | 2018 |
| J P Technology & Design Services Limited | Professional & scientific | 2021 |
| J Paterson Equine Dental Services Limited | Agriculture & fishing | 2021 |
| J R Archer Projects Ltd | Professional & scientific | 2020 |
| J Russell Electrical Services Limited | Professional & scientific | 2017 |
| J S Associates (NW) Ltd | Professional & scientific | 2016 |
| J S Multiwork Limited | Construction | 2020 |
| J Stannley Property Group Ltd | Real estate | 2020 |
| J Styles Limited | Professional & scientific | 2021 |
| J Sutch Holdings Limited | Other services | 2024 |
| J Sykes & Sons Limited | Extraterritorial | 1998 |
| J V Cotter Limited | Administrative & support | 2004 |
| J W Bennett Electrical Ltd | Construction | 2017 |
| J W Morley Limited | Administrative & support | 2026 |
| J W Teknika Limited | Professional & scientific | 2018 |
| J Wigley Consultancy Limited | Administrative & support | 2015 |
| J Wigley Property Developments Limited | Real estate | 2019 |
| J Wilkinson Electrical Solutions Limited | Construction | 2023 |
| J Winstanley Plumbing & Heating Ltd | Construction | 2023 |
| J Woodyer Consultancy Ltd | Professional & scientific | 2021 |
| J&A IT Solutions Ltd | Information & communication | 2018 |
| J&E Elliot Consultancy Services Limited | Professional & scientific | 2020 |
| J&G Damp Proofing Ltd | Construction | 2021 |
| J&H Travel Limited | Administrative & support | 2023 |
| J&J Advisory Services Ltd | Wholesale & retail | 2016 |
| J&J Team Ventures Limited | Hospitality | 2024 |
| J&Jd Properties Limited | Real estate | 2023 |
| J&L Catering Co (NW) Limited | Hospitality | 2019 |
| J&L Healthcare Services Ltd | Administrative & support | 2022 |
| J&L R Consultancy Ltd | Administrative & support | 2021 |
| J&M Docpharm Limited | Health & social care | 2024 |
| J&Mh Consulting Ltd | Professional & scientific | 2022 |
| J&Nb Recoveries Ltd | Transport & logistics | 2024 |
| J&P Projects Limited | Construction | 2012 |
| J&S Customs Ltd | Manufacturing | 2024 |
| J-Cadesign Ltd | Professional & scientific | 2018 |
| J. & K. Ross Limited | Wholesale & retail | 1976 |
| J. Antens Limited | Administrative & support | 2015 |
| J. Charlton Engineering Limited | Professional & scientific | 2019 |
| J. Edwards Building Compliance Service Ltd | Administrative & support | 2025 |
| J. Tucker AP Services Limited | Professional & scientific | 2005 |
| J.A.K Truck Ltd | Transport & logistics | 2018 |
| J.A.L. Consultancy Limited | Information & communication | 2007 |
| J.B.Mellor,Limited | | 1951 |
| J.Connelly Engineering Services Ltd | Administrative & support | 2025 |
| J.Cunningham Contracting Limited | Information & communication | 2023 |
| J.D. Contracting (Bury) Limited | Construction | 2009 |
| J.G Consulting Group Ltd | Administrative & support | 2025 |
| J.K.S.P. Services Limited | Manufacturing | 2003 |