| Jehobs Ltd | Health & social care | 2018 |
| JEI AMV Ltd | Administrative & support | 2017 |
| JEI Drilling & Cutting Solutions Ltd | Administrative & support | 2015 |
| JEI Resources Ltd | Administrative & support | 2017 |
| Jekca U.K. Limited | Wholesale & retail | 2019 |
| JEM Fire Limited | Construction | 2022 |
| Jemima Oscar Limited | Wholesale & retail | 2017 |
| Jeneddy Limited | Health & social care | 2021 |
| Jennifer Gibson Jewellery Limited | Wholesale & retail | 2021 |
| Jenox Batteries (UK) Ltd | Wholesale & retail | 2025 |
| Jereina Limited | Hospitality | 2018 |
| Jerhomes LLP | | 2025 |
| JES Roofing Services Ltd | Construction | 2017 |
| JET Services Limited | Manufacturing | 2023 |
| JEZ P Consulting Ltd | Professional & scientific | 2023 |
| JF Engineering Design Limited | Professional & scientific | 2024 |
| JFF Transport Limited | Transport & logistics | 2026 |
| JG Decorating Ltd | Construction | 2018 |
| JG Hubs Ltd | Arts & recreation | 2023 |
| JH Bakers Ltd | Hospitality | 2024 |
| Jigsaw 1 Piece at a Time Ltd | Other services | 2021 |
| Jigsaw Business Services Ltd | Professional & scientific | 2013 |
| Jimkar Transporters Ltd | Transport & logistics | 2024 |
| Jimmy JAY JAY Ltd | Wholesale & retail | 2025 |
| Jimmy Webster Limited | Manufacturing | 2011 |
| Jims Dark Kitchen Ltd | Hospitality | 2026 |
| JJ Boland Limited | Real estate | 2021 |
| JJ Property Solutions Ltd | Real estate | 2019 |
| JJ12 Logistics and Services Ltd | Transport & logistics | 2025 |
| JJB Renovations Limited | Construction | 2019 |
| JJM Publishing Limited | Information & communication | 2023 |
| Jjsmaintenance Ltd | Administrative & support | 2023 |
| JJW Joinery & Property Maintenance Ltd | Other services | 2023 |
| JK Transport Logistics Ltd | Transport & logistics | 2019 |
| JKE Motors Ltd | Transport & logistics | 2025 |
| JLB Tutoring Ltd | Education | 2025 |
| JLC Finance Limited | Professional & scientific | 2025 |
| JLJ Fire Engineering Ltd | Public administration | 2018 |
| Jllc Properties Ltd | Real estate | 2017 |
| JLS Property Rental Limited | Real estate | 2025 |
| JLT Care Limited | Public administration | 2022 |
| JM Amusements Ltd | Other services | 2023 |
| JM BAG Supply Ltd | Wholesale & retail | 2026 |
| JM Business Development Ltd | Wholesale & retail | 2024 |
| JM Coporation Ltd | Wholesale & retail | 2025 |
| JM Quantity Surveying Services Ltd | Professional & scientific | 2024 |
| JM Robinson Education Consultant Ltd | Education | 2015 |
| JM24 Ltd | Professional & scientific | 2024 |
| JMB Lifestyles Ltd | Professional & scientific | 2025 |
| JMC Motors Limited | Wholesale & retail | 2014 |
| Jmha North West | Real estate | 2013 |
| Jmip Ltd | Professional & scientific | 2015 |
| JML Accountancy Services Ltd | Professional & scientific | 2018 |
| JMS Mortgages Ltd | Financial services | 2019 |
| JN Environmental Ltd | Professional & scientific | 2020 |
| JND & Co (NW) Ltd | Real estate | 2025 |
| JO Medicare Limited | Health & social care | 2024 |
| Jo's Pizza Ltd | Hospitality | 2023 |
| JOB 41 Ltd | Transport & logistics | 2015 |
| Joba (NW) Ltd | Hospitality | 2022 |
| Jobtel-Merger & Acquisition Catalysts Limited | Administrative & support | 2019 |
| Jodie Hodgkinson Ltd | Wholesale & retail | 2025 |
| Joe's Travel Ltd | Transport & logistics | 2025 |
| John Ribchester Consultancy Ltd | Manufacturing | 2017 |
| Johnny Carr Limited | Construction | 2015 |
| Jojo Pizza Ltd | Hospitality | 2026 |
| Jollop Limited | Other services | 2020 |
| JON Meek Transport Limited | Transport & logistics | 2005 |
| Jonathan Hall Limited | Administrative & support | 2007 |
| Jones & Brooks,Limited | Manufacturing | 1898 |
| Jones Engineering Solutions Ltd | Manufacturing | 2025 |
| Joscia Properties Ltd | Other services | 2023 |
| Joseph Mathew Productions Limited | Health & social care | 2022 |
| Joseph Thomas Group Limited | Construction | 2023 |
| Joshtob Ltd | Other services | 2014 |
| Joste Ltd | Wholesale & retail | 2025 |
| JP Midland Builders Limited | Construction | 2026 |
| JP Vale Ltd | Hospitality | 2025 |
| JPH Electrical Contractors Ltd | Construction | 2022 |
| JPK Plumbing and Heating Limited | Construction | 2009 |
| JR Food Catering Ltd | Hospitality | 2025 |
| JR Haulage Ltd | Transport & logistics | 2025 |
| JR Site Services Ltd | Construction | 2016 |
| Jrlm Commercial Limited | Real estate | 2024 |
| JS Energy Consultants Ltd | Professional & scientific | 2024 |
| JS Enterprises NW Ltd | Real estate | 2021 |
| JS Heating Solutions Ltd | Construction | 2016 |
| JS Manchester Ltd | Construction | 2021 |
| JSM Construction and Site Management Limited | Construction | 2012 |
| JTS Energy Enterprises Ltd | Construction | 2023 |
| JU Services Ltd | Transport & logistics | 2021 |
| Jubilee Caterers Ltd | Hospitality | 2015 |
| Jubilee Dyeing & Finishing Company Limited | Extraterritorial | 1995 |
| Julian Whatmough Food Consultancy Limited | Hospitality | 2018 |
| Juliet Garment Ltd | Wholesale & retail | 2025 |
| Julwan Heathcare Limited | Public administration | 2018 |
| Junction Retailers Ltd | Wholesale & retail | 2012 |
| Jung Bros Limited | Real estate | 1997 |
| Jungle Grill Lancashire Ltd | Hospitality | 2020 |
| Jupiter Investments (Halifax) Limited | Real estate | 2003 |