| Joni Consultancy Company Ltd | Professional & scientific | 2012 |
| Joni Property Management & Investment Ltd | Real estate | 2017 |
| Joouz Digital Ltd | Information & communication | 2026 |
| JORO666 Ltd | Transport & logistics | 2018 |
| Josan Home Improvement Limited | Construction | 2020 |
| Josan Ltd | Construction | 2025 |
| Jose TS Property Services Ltd | Construction | 2025 |
| Joseph Solutions Limited | Information & communication | 2024 |
| Josephine Transport Ltd | Transport & logistics | 2020 |
| Joshan Construction Limited | Construction | 2014 |
| Joshi Contracting Limited | Construction | 2024 |
| Josu Air Install Ltd | Construction | 2026 |
| Joti Properties Ltd | Real estate | 2026 |
| Journals-Uk Ltd | Wholesale & retail | 2025 |
| Joy Box Global Limited | Wholesale & retail | 2023 |
| Joyboxx Ltd | Wholesale & retail | 2025 |
| JP Home Creations Limited | Construction | 2019 |
| JP Planning and Interior Designing Limited | Professional & scientific | 2025 |
| JP Technology Solutions Ltd | Information & communication | 2022 |
| Jpek Healthcare Limited | Other services | 2017 |
| JPH & Co Solutions Limited | Construction | 2023 |
| Jpics (UK) Limited | Construction | 2014 |
| JPS Food & Wine Ltd | Wholesale & retail | 2019 |
| JPS Grover Ltd | Wholesale & retail | 2018 |
| JR Events Ltd | Administrative & support | 2024 |
| JR Global Properties Limited | Real estate | 2025 |
| JR Mobile Tyre Limited | Wholesale & retail | 2025 |
| JR Property Management Services Limited | Real estate | 2023 |
| Jrbs Properties Ltd | Real estate | 2025 |
| Jrjs Constructions Ltd | Construction | 2026 |
| JS Automotives Ltd | Wholesale & retail | 2018 |
| JS Dhanju Construction Ltd | Construction | 2023 |
| JS Group Holdings Ltd | Financial services | 2025 |
| JS Prime Deals Ltd | Wholesale & retail | 2025 |
| JS Shoker Brickwork Ltd | Construction | 2019 |
| JS Treehouse Ltd | Real estate | 2026 |
| JSB Autocare Ltd | Wholesale & retail | 2025 |
| JSC Integrated Solutions Ltd | Wholesale & retail | 2026 |
| JSG Defence & Security Solutions Ltd | Administrative & support | 2025 |
| JSG Finance Consulting Ltd | Professional & scientific | 2018 |
| JSI Works Ltd | Transport & logistics | 2018 |
| JSK Construction Ltd | Construction | 2021 |
| JSK Food and Wine Ltd | Wholesale & retail | 2021 |
| JSM Advanced Properties Ltd | Health & social care | 2023 |
| JSP Overseas Ltd | Wholesale & retail | 2019 |
| Jsr+Pkr Holdings Ltd | Financial services | 2023 |
| JSS Group Investments Ltd | Real estate | 2022 |
| JTB Developments Design and Build Ltd | Construction | 2018 |
| JTB Window Cleaning Limited | Administrative & support | 2017 |
| JTI Retail Ltd | Wholesale & retail | 2025 |
| Juba Smart Living Ltd | Wholesale & retail | 2023 |
| Judge Transport Ltd | Transport & logistics | 2025 |
| Jugraj Ltd | Financial services | 2025 |
| Julia Hair and Cosmetics (Hounslow) Limited | Wholesale & retail | 2020 |
| Jumanaa Limited | Wholesale & retail | 2025 |
| Jumkins UK Properties Ltd | Real estate | 2018 |
| Juneja Investments Ltd | Real estate | 2022 |
| Jungle VIP Ltd | Administrative & support | 2024 |
| Juniper Film Solutions Ltd | Transport & logistics | 2019 |
| Junked World Ltd | Manufacturing | 2025 |
| Junocis Hub Ltd | Extraterritorial | 2022 |
| Junuu Limited | Real estate | 2025 |
| Juny Group Ltd | Manufacturing | 2018 |
| Jupiter Cars & Couriers Limited | Transport & logistics | 2012 |
| Jupiter Ring Ltd | Wholesale & retail | 2025 |
| Jupiter Software Solutions Ltd | Information & communication | 2026 |
| Jurassic Models Limited | Education | 2011 |
| Jurisyn Ltd | Professional & scientific | 2024 |
| JUS Havens Ltd | Construction | 2023 |
| Just Meat and Fish Company Ltd | Wholesale & retail | 2023 |
| Just Pack IT Limited | Manufacturing | 2024 |
| Just the MAN Handyman Limited | Education | 2023 |
| Just Trendz Ltd | Wholesale & retail | 2023 |
| Justvia Limited | Professional & scientific | 2018 |
| JV Project Management Ltd | Professional & scientific | 2020 |
| JVP Accountants Ltd | Professional & scientific | 2018 |
| JVS Motion Productions Ltd | Administrative & support | 2016 |
| JVW Management Ltd | Real estate | 2023 |
| JW Lounge & Restaurant Ltd | Hospitality | 2026 |
| JXA Mobile&Vape Limited | Wholesale & retail | 2025 |
| JY51SHA Ltd | Wholesale & retail | 2025 |
| JYO Construction Ltd | Construction | 2025 |
| Jyot Pharm Consulting Ltd | Financial services | 2020 |
| Jyotish Solutions Ltd | Information & communication | 2015 |
| Jyss Limited | Administrative & support | 2024 |
| K & S Cakes Ltd | Wholesale & retail | 2016 |
| K & T Enterprises Limited | Wholesale & retail | 2025 |
| K 2 a Driving School Limited | Other services | 2008 |
| K C Parmar Ltd | Wholesale & retail | 2024 |
| K Damera Limited | Wholesale & retail | 2025 |
| K Darbar Ltd | Hospitality | 2023 |
| K I Retail Ltd | Wholesale & retail | 2018 |
| K J Builders (London) Ltd | Construction | 2015 |
| K Karahi Ltd | Wholesale & retail | 2019 |
| K Karahi Restaurant Limited | Hospitality | 2019 |
| K Logistics Limited | Transport & logistics | 2020 |
| K S Engineering & Design Ltd | Construction | 2016 |
| K S Sidhu Constructions Limited | Construction | 2023 |
| K Sandhu Transport Ltd | Transport & logistics | 2017 |
| K&J Asset Management Ltd | Real estate | 2016 |