| JPS Sports Limited | Wholesale & retail | 2011 |
| Jpscenery Limited | Construction | 2015 |
| Jpvend Limited | Wholesale & retail | 2025 |
| JPW Heating Services Limited | Construction | 2019 |
| JPW Real Estate Ltd | Real estate | 2019 |
| JPY Group Limited | Other services | 2018 |
| JR Brothers Corp Ltd | Administrative & support | 2016 |
| JR Dantzic Ltd | Real estate | 2019 |
| JR Homes & Rentals Limited | Real estate | 2025 |
| JR HSE Consultancy Ltd | Professional & scientific | 2026 |
| JR Industrial Limited | Real estate | 2015 |
| JR Liberty 35 Ltd | Other services | 2019 |
| JR London Ltd | Wholesale & retail | 2026 |
| JR Spokes Ltd | Real estate | 2019 |
| JR Talent ID Ltd | Arts & recreation | 2013 |
| JR12 Media Limited | Professional & scientific | 2016 |
| JR4S Limited | Other services | 2015 |
| JR8 Express Limited | Wholesale & retail | 2011 |
| Jrbradford Ltd | Information & communication | 2018 |
| JRC Electrical Contract Services Limited | Construction | 2020 |
| JRH Electrical LC Limited | Energy | 2017 |
| Jrjc Consulting Ltd | Information & communication | 2016 |
| Jrle Limited | Wholesale & retail | 2022 |
| JRM Construction Project Management Ltd | Professional & scientific | 2025 |
| JRM Supplies Ltd | Construction | 2014 |
| JRP Automotive Car Sales Limited | Wholesale & retail | 2025 |
| JRP Productions Limited | Other services | 2021 |
| JRP Retail Ltd | Wholesale & retail | 2016 |
| JRP Tech Limited | Other services | 2020 |
| JRR Sales Ltd | Other services | 2025 |
| JRS Group Holdings Limited | Financial services | 2024 |
| JRT Order Ltd | Wholesale & retail | 2026 |
| Jrtb Properties Ltd | Real estate | 2026 |
| JRY Property Group Ltd | Hospitality | 2024 |
| JRY Property Holdings Ltd | Real estate | 2025 |
| JRY Property Sourcing Ltd | Real estate | 2025 |
| JS Clarity Limited | Construction | 2026 |
| JS Compliance Consultants Limited | Professional & scientific | 2019 |
| JS Courier Service Ltd | Transport & logistics | 2022 |
| JS Euro MF Limited | Information & communication | 2025 |
| JS Euro Sans Ltd | Information & communication | 2025 |
| JS Global Trading Limited | Wholesale & retail | 2018 |
| JS Local Ltd | Hospitality | 2021 |
| JS Logical RIG Ltd | Information & communication | 2025 |
| JS Pantona Ltd | Wholesale & retail | 2025 |
| JS Unique Building Services Limited | Construction | 2025 |
| Jsaber Limited | Wholesale & retail | 2020 |
| Jscc Management (Europe) Limited | Transport & logistics | 2014 |
| JSD Homes Ltd | Real estate | 2024 |
| JSD Investments Limited | Extraterritorial | 2013 |
| JSF Solutions Ltd | Construction | 2019 |
| JSG Media Ltd | Professional & scientific | 2018 |
| Jshonlyone Ltd | Wholesale & retail | 2025 |
| JSI Production Ltd | Information & communication | 2025 |
| JSM Cars Ltd | Wholesale & retail | 2014 |
| JSM Contracting Services Ltd | Administrative & support | 2018 |
| JSP (Electronic Holdings) Limited | Administrative & support | 1996 |
| JSP Properties 1960 Ltd | Real estate | 2025 |
| Jspaf Ltd | Manufacturing | 2019 |
| Jspr Properties Ltd | Real estate | 2025 |
| Jsquared Electrical Ltd | Manufacturing | 2023 |
| JSR Property Lettings Limited | Real estate | 2020 |
| JSW Surgical Ltd | Health & social care | 2023 |
| JT & Crew Ltd | Hospitality | 2022 |
| JT Business Consultants Limited | Financial services | 2013 |
| JT Computers & IT Ltd | Information & communication | 2025 |
| JT Pharma Ltd | Health & social care | 2021 |
| JT Project Management Services Ltd | Construction | 2024 |
| JT Property Solutions Ltd | Real estate | 2025 |
| JT Scenery Limited | Manufacturing | 2021 |
| JTA International Investment Holding Ltd | Financial services | 2020 |
| Jtao Trade Ltd | Wholesale & retail | 2025 |
| JTC Engineering Ltd | Transport & logistics | 2020 |
| JTD Group Ltd | Manufacturing | 2015 |
| Jtechno Ltd | Information & communication | 2025 |
| Jter (NCN) Limited | Financial services | 2023 |
| Jter Limited | Real estate | 2018 |
| Jter Trading Limited | Wholesale & retail | 2021 |
| JTG Electrical Ltd | Construction | 2018 |
| JTK Shipping Ltd | Transport & logistics | 2025 |
| JTM Construction Group Limited | Construction | 2019 |
| Jtmritsolutions Limited | Information & communication | 2026 |
| JTR Transport Services Limited | Transport & logistics | 2023 |
| Jtscatering Limited | Hospitality | 2024 |
| Ju-Tech Consultants Ltd | Professional & scientific | 2019 |
| JUA SUNLIGHT1 Limited | Health & social care | 2020 |
| Juan L Ltd | Wholesale & retail | 2021 |
| Jubaob Ltd | Wholesale & retail | 2025 |
| Jubilee Automotive Ltd | Wholesale & retail | 2019 |
| Jubilee Community Trust | Arts & recreation | 2011 |
| Jubitor Ltd | Other services | 2018 |
| Judd Health Limited | Wholesale & retail | 2017 |
| Judi Hufton Designs Limited | Real estate | 1999 |
| Judi Hufton Property Designs Limited | Real estate | 2016 |
| Judith DE Berker Limited | Manufacturing | 2023 |
| Judith Hammond Limited | Health & social care | 2015 |
| Judith's Alterations Ltd | Professional & scientific | 2023 |
| Jugate Investments Private Limited | Financial services | 2019 |
| Jugate Property Developers Private Limited | Construction | 2024 |
| Juice E Miele Ltd. | Financial services | 2015 |