| JM Resi Advisory Limited | Professional & scientific | 2023 |
| JMA Consulting Ltd | Professional & scientific | 1999 |
| JMA Fibre Solutions Ltd | Administrative & support | 2020 |
| JMA Property & Lettings Ltd | Real estate | 2021 |
| Jmahono Ltd | Health & social care | 2023 |
| Jmanu Enterprise Limited | Health & social care | 2022 |
| JMB Consulting Limited | Professional & scientific | 2024 |
| JMC Auto Repair Ltd | Wholesale & retail | 2025 |
| JMC Holdings & Investment Ltd | Real estate | 2023 |
| JMC Property Maintenance & Landlord Services Limited | Construction | 2011 |
| JMC Roofing Ltd | Construction | 2020 |
| JMC Scaffolding Leeds Ltd | Construction | 2024 |
| JMD Engineering Design Ltd | Professional & scientific | 2017 |
| Jmep Properties Limited | Real estate | 2021 |
| JMF Properties & Sons Limited | Real estate | 2025 |
| JMF Tools Ltd | Wholesale & retail | 2019 |
| JMG Employee Benefits Limited | Financial services | 2015 |
| JMG GI10 Limited | Financial services | 2025 |
| JMG GI11 Limited | Financial services | 2025 |
| JMG GI12 Limited | Financial services | 2026 |
| JMG GI2 Limited | Financial services | 2022 |
| JMG GI3 Limited | Financial services | 2022 |
| JMG GI5 Limited | Financial services | 2022 |
| JMG GI6 Limited | Financial services | 2023 |
| JMG GI7 Limited | Financial services | 2023 |
| JMG GI8 Limited | Financial services | 2023 |
| JMG GI9 Limited | Financial services | 2025 |
| JMG Group Investments Limited | Financial services | 2020 |
| JMG Insurance Brokers Limited | Financial services | 1972 |
| JMG RMS Limited | Financial services | 2023 |
| JMH Cosmetics Limited | Wholesale & retail | 2016 |
| JMH Elmirghani Limited | Professional & scientific | 2012 |
| Jmhc Properties Ltd | Real estate | 2022 |
| JMI Compliance Ltd | Professional & scientific | 2024 |
| JMI Property Services Ltd | Real estate | 2018 |
| JMJ Hawthorne Ltd | Hospitality | 2021 |
| JMJ Innovative Properties Ltd | Real estate | 2024 |
| JMJ Medicolegal Limited | Health & social care | 2021 |
| JMK Estates Ltd | Construction | 2024 |
| JML Ventures Ltd | Information & communication | 2026 |
| Jmle Limited | Administrative & support | 2017 |
| JMN Properties Ltd | Real estate | 2021 |
| Jmokay Limited | Information & communication | 2014 |
| JMP SEO Ltd | Professional & scientific | 2024 |
| Jmpg Associates Ltd | Professional & scientific | 2017 |
| JMR Construction (Leeds) Limited | Construction | 2018 |
| JMR Developments (Leeds) Limited | Construction | 2021 |
| JMR Homes (Leeds) Limited | Real estate | 2023 |
| JMR Ltd | Professional & scientific | 2019 |
| JMS BFD Limited | Administrative & support | 2021 |
| JMS Insulation Limited | Wholesale & retail | 1993 |
| JMS Pest Solutions Limited | Administrative & support | 2024 |
| JMS Property Ltd | Real estate | 2026 |
| JMS Property Solutions (Leeds) Limited | Construction | 2024 |
| JMT Group (Yorkshire) Limited | Financial services | 2024 |
| JMT Group Limited | Financial services | 1990 |
| JMT Holdings Limited | Financial services | 2024 |
| JMT Homes Limited | Real estate | 2021 |
| JMT International Couriers Limited | Transport & logistics | 2025 |
| JMT Mortgage Solutions Limited | Financial services | 2022 |
| JMT Property Solutions Limited | Real estate | 2018 |
| JMW (88) Ltd | Real estate | 2020 |
| JMW Engineering Solutions Ltd | Professional & scientific | 2017 |
| JMW Online Ltd | Real estate | 2019 |
| JN & Chop Ltd | Hospitality | 2025 |
| JN Godsall & Co Limited | Financial services | 2019 |
| JN Tyre Sales Ltd | Wholesale & retail | 2026 |
| JNC Safety Services Limited | Professional & scientific | 2002 |
| JND Properties Leeds Ltd | Real estate | 2025 |
| Jndr Edwards Limited | Administrative & support | 2013 |
| JNK Enterprise Limited | Professional & scientific | 2015 |
| JNP Properties Limited | Real estate | 2017 |
| JNP Renovations Ltd | Construction | 2023 |
| JNR Contracting Limited | Construction | 2014 |
| JNR Engineering Solution Ltd | Professional & scientific | 2025 |
| JNR Marketing Limited | Professional & scientific | 2025 |
| JNR Roofing Maintenance Ltd | Administrative & support | 2016 |
| JNR Studio Ltd | Professional & scientific | 2021 |
| JNT Construction Limited | Construction | 2025 |
| JO George Therapy Ltd | Health & social care | 2026 |
| JO Heyworth HR Limited | Administrative & support | 2019 |
| JO Holdsworth Recruitment - Temporary Solutions LLP | | 2017 |
| JO Holdsworth Recruitment Limited | Administrative & support | 2005 |
| JO Houchin Limited | Professional & scientific | 2013 |
| JO Hovell Financial Planning and Solutions Ltd | Financial services | 2023 |
| JO IT Consulting Ltd | Information & communication | 2017 |
| JO M Brown Consulting Limited | Professional & scientific | 2023 |
| JO Perkins Research Limited | Professional & scientific | 2013 |
| Jo&Jo Lettings Ltd | Real estate | 2025 |
| Jo&Teo Ltd | Health & social care | 2022 |
| Joanna Cleaning Leeds Ltd | Administrative & support | 2025 |
| JOB Match (UK) Ltd | Administrative & support | 2011 |
| JOB MGT Ltd | Information & communication | 2021 |
| JOB Safe Ltd | Construction | 2015 |
| JOB Safe Rope Access Ltd | Construction | 2023 |
| Jobhert Ltd | Professional & scientific | 2018 |
| Jobistry Limited | Administrative & support | 2024 |
| Jobmaestro Ltd | Information & communication | 2023 |
| Jobs for Women Ltd | Administrative & support | 2021 |
| Jobspiration Ltd | Information & communication | 2019 |