| JJ Dental Hygiene Ltd | Health & social care | 2024 |
| JJ Express Limited | Information & communication | 2006 |
| JJ Extensions Ltd | Construction | 2018 |
| JJ Financial Planning Ltd | Financial services | 2019 |
| JJ Fuels UK Limited | Professional & scientific | 2008 |
| JJ Holdings Leicester Limited | Real estate | 2020 |
| JJ Krishna Limited | Real estate | 2024 |
| JJ Property Services Limited | Real estate | 2021 |
| JJ Retail Consultancy Limited | Professional & scientific | 2008 |
| JJ Retail UK Ltd | Wholesale & retail | 2025 |
| JJ Scaffolding Group Limited | Financial services | 2025 |
| JJ Scaffolding Hire Limited | Administrative & support | 2025 |
| JJ Scaffolding Recruitment Limited | Administrative & support | 2025 |
| JJ Scaffolding Vehicles Limited | Administrative & support | 2025 |
| JJ Services (Leic) Limited | Real estate | 2025 |
| JJ Socks Limited | Wholesale & retail | 2017 |
| JJ Thermal Insulation Limited | Construction | 2025 |
| Jjans Holdings Ltd | Financial services | 2026 |
| JJB Home Improvements Limited | Construction | 2016 |
| JJB Solutions Ltd | Transport & logistics | 2022 |
| JJJ Monopoly Limited | Real estate | 2018 |
| Jjjg Holdings Ltd | Financial services | 2024 |
| JJK Electrical Services Limited | Construction | 2022 |
| JJK Serv. Ltd | Manufacturing | 2025 |
| JJL Associates Ltd | Energy | 2001 |
| JJM International Limited | Wholesale & retail | 2023 |
| JJM Investment Holdings Limited | Real estate | 2017 |
| JJS Builders and Contractors Limited | Construction | 2024 |
| JJS Real Estate and Development Limited | Construction | 2024 |
| JJS Wealth Limited | Real estate | 2025 |
| Jjsh Ltd | Real estate | 2023 |
| Jjtg Developments Limited | Real estate | 2024 |
| JJUSMANN105 Ltd | Health & social care | 2026 |
| JK (IND) Ltd | Construction | 2026 |
| JK Asphalt Limited | Construction | 2004 |
| JK Assessment Services Limited | Health & social care | 2003 |
| JK Breaks Limited | Hospitality | 2020 |
| JK Building Solutions Ltd | Construction | 2024 |
| JK Civil Engineering Services Limited | Professional & scientific | 2018 |
| JK Consultants Limited | Professional & scientific | 2024 |
| JK Electrical (Leicester) Ltd | Construction | 2016 |
| JK Homely Catering Ltd | Hospitality | 2022 |
| JK Investments 1 Limited | Real estate | 2023 |
| JK Legacy Ltd | Real estate | 2020 |
| JK Residentials Ltd | Real estate | 2018 |
| JK Sangha Ltd | Real estate | 2025 |
| JK Smart Car's Ltd | Wholesale & retail | 2016 |
| JK1 Trading Ltd | Wholesale & retail | 2016 |
| Jkabia Limited | Wholesale & retail | 2016 |
| Jkabia Security Limited | Other services | 2025 |
| JKB Assets Ltd | Real estate | 2024 |
| JKG Haulage Limited | Transport & logistics | 2024 |
| JKI Housing Limited | Real estate | 2024 |
| Jkkk Limited | Professional & scientific | 2022 |
| JKO Limited | Extraterritorial | 2018 |
| JKR London Limited | Professional & scientific | 2017 |
| Jksk Investments Ltd | Real estate | 2026 |
| JKT Foods Europe Limited | Wholesale & retail | 2017 |
| Jkteam Limited | Construction | 2025 |
| JKV IND Limited | Wholesale & retail | 2008 |
| JL Car Motors Ltd | Wholesale & retail | 2025 |
| JL Investments (Leic) Ltd | Real estate | 2024 |
| JL Joinery & Construction Ltd | Construction | 2026 |
| JL Mentor Ltd | Administrative & support | 2020 |
| JL Residential Holdings Limited | Financial services | 2016 |
| JL Scenery Limited | Construction | 2021 |
| JLC Financial Solutions Limited | Financial services | 2014 |
| Jlcs Property Limited | Real estate | 2023 |
| Jlew Limited | Real estate | 2019 |
| Jlhc Holdings Limited | Financial services | 2020 |
| Jliral Property Ltd | Real estate | 2024 |
| Jliral Store Ltd | Wholesale & retail | 2021 |
| JLM & C Properties Ltd | Real estate | 2020 |
| Jlmcom Limited | Wholesale & retail | 2013 |
| JLN Civils Ltd | Construction | 2024 |
| JLP Estates Ltd | Real estate | 2020 |
| JLP Home Survey Ltd | Professional & scientific | 2022 |
| JLR Bespoke Property Renovations Limited | Construction | 2017 |
| JLR Inspirations Limited | Real estate | 2019 |
| JLR Professional Services Ltd | Information & communication | 2024 |
| Jltracksuits Limited | Wholesale & retail | 2026 |
| JLW Holdings Ltd | Administrative & support | 2016 |
| JLY Investments Ltd | Real estate | 2024 |
| JM Consultancy - Practical Project Management Ltd | Professional & scientific | 2026 |
| JM Electrical (Leicester) Ltd | Construction | 2025 |
| JM Food Services Limited | Hospitality | 2024 |
| JM Haulage Limited | Transport & logistics | 2002 |
| JM Implants & Aesthetics Ltd | Health & social care | 2023 |
| JM International Limited | Financial services | 2024 |
| JM Investments (Leicester) Limited | Real estate | 2023 |
| JM Lines Ltd | Transport & logistics | 2025 |
| JM Metabolomics Limited | Professional & scientific | 2026 |
| JM Phoenix Ltd | Hospitality | 2025 |
| JM Recycling Ltd | Administrative & support | 2024 |
| JM Repairs Limited | Wholesale & retail | 2026 |
| JM Trusted Builders Limited | Construction | 2026 |
| JM Workforce Services Ltd | Professional & scientific | 2022 |
| Jmason Investments Ltd | Real estate | 2025 |
| JMC Aesthetics Ltd | Other services | 2026 |
| JMC Display Installation Limited | Construction | 2022 |