| JHL Trading Ltd | Wholesale & retail | 2018 |
| JHM Group Holdings Limited | Financial services | 2026 |
| Jhona DEL Rosario Limited | Health & social care | 2013 |
| Jhoots Medipharma Limited | Wholesale & retail | 2019 |
| JHP Assets Limited | Real estate | 2025 |
| JHP Midland Ltd | Professional & scientific | 2025 |
| JHP Property Limited | Real estate | 2021 |
| JHR Consultancy Ltd | Professional & scientific | 2022 |
| JHR Living Ltd | Administrative & support | 2025 |
| JHR Motors Limited | Wholesale & retail | 2026 |
| JHS Foods Limited | Wholesale & retail | 2025 |
| JHS Golden Group UK Ltd | Construction | 2022 |
| JHT Consultancy Ltd | Real estate | 2026 |
| JHT Investment Limited | Financial services | 2025 |
| JHT Services Limited | Health & social care | 2021 |
| Jhyount Properties Limited | Real estate | 2024 |
| Jhzing Limited | Wholesale & retail | 2025 |
| JI Corporation Ltd | Other services | 2024 |
| JI Enterprise Limited | Wholesale & retail | 2019 |
| JI Medics Limited | Health & social care | 2014 |
| JIA Dream Homes Ltd | Real estate | 2024 |
| JIA Hire Limited | Administrative & support | 2025 |
| JIA Luxury Stays Ltd | Hospitality | 2025 |
| JIA Real Estate Ltd | Real estate | 2023 |
| JIA Sources International Limited | Manufacturing | 2004 |
| Jiafood Ltd | Hospitality | 2025 |
| Jiang Bulding Services Limited | Construction | 2025 |
| Jianghu Ltd | Hospitality | 2026 |
| Jiangning Limited | Hospitality | 2020 |
| Jianhui London Limited | Manufacturing | 2024 |
| JIB Property Group Ltd | Construction | 2019 |
| Jibal Birmingham Limited | Administrative & support | 2025 |
| Jibraan Properties Ltd | Real estate | 2022 |
| Jibt Investments Ltd | Real estate | 2025 |
| JIC Star Ltd | Wholesale & retail | 2025 |
| Jicc CIC | Education | 2020 |
| Jidabis Limited | Health & social care | 2022 |
| Jidd Properties Ltd | Real estate | 2025 |
| Jiddeck Services Ltd | Administrative & support | 2020 |
| Jidong Chatham ST Shop Ltd | Hospitality | 2020 |
| JIG Investments Limited | Real estate | 2018 |
| JIG Management Limited | Real estate | 2020 |
| Jigger Brothers Ltd | Wholesale & retail | 2025 |
| Jiggins Lane 1972 Limited | Extraterritorial | 2014 |
| Jigsaw Catering Ltd | Hospitality | 2007 |
| Jigsaw Commerce Limited | Wholesale & retail | 2022 |
| Jigsaw Housing Management Ltd | Construction | 2024 |
| Jigsaw Management Consultancy Ltd | Energy | 2017 |
| Jigsaw Wellbeing CIC | Health & social care | 2026 |
| Jigu Stores Limited | Wholesale & retail | 2019 |
| Jigz Specialist Technician Ltd | Manufacturing | 2024 |
| JIH Constructions Limited | Construction | 2025 |
| Jihan Post Ltd | Extraterritorial | 2018 |
| Jiji Hachimi Ltd | Wholesale & retail | 2024 |
| Jiki Ltd | Information & communication | 2024 |
| Jilabi Birmingham Casual Dining Ltd | Hospitality | 2020 |
| Jilabi Tandoor & Grill Ltd | Hospitality | 2025 |
| Jildish Ltd | Wholesale & retail | 2021 |
| Jill Furnevall Ltd | Administrative & support | 2021 |
| Jimbilin Properties Limited | Real estate | 2025 |
| Jimbos Affiliates UK Limited | Professional & scientific | 2017 |
| Jimelan Developments Ltd | Real estate | 2015 |
| Jimmy Blinds Ltd | Other services | 2020 |
| Jimmy Food Ltd | Hospitality | 2026 |
| Jimmy Luxury International Ltd | Wholesale & retail | 2024 |
| Jimmy P Property Services Ltd | Real estate | 2025 |
| Jimmy Transport Limited | Transport & logistics | 2022 |
| Jimmy's JAP Parts Ltd | Wholesale & retail | 2022 |
| Jimmy's Kitchen 888 Ltd | Hospitality | 2026 |
| Jimmy's Kitchen 923 Ltd | Hospitality | 2022 |
| Jimmy's Restaurant and Bar Mediterranean Limited | Hospitality | 2018 |
| Jimmys Express Group Ltd | Manufacturing | 2025 |
| Jimmys Logistics and Removals Limited | Transport & logistics | 2025 |
| Jimmys Pizza Ltd | Hospitality | 2018 |
| Jimmys Wholesale Limited | Wholesale & retail | 2021 |
| Jimmys WOK Limited | Hospitality | 2025 |
| Jimp Holding Limited | Financial services | 2023 |
| Jimy Brothers Group UK Ltd | Manufacturing | 2020 |
| Jim’S Rims Ltd | Wholesale & retail | 2024 |
| JIN Development Ltd | Real estate | 2021 |
| JIN Hong Limited | Hospitality | 2021 |
| JIN XIU LIN & Company Ltd | Hospitality | 2015 |
| Jind Investments Ltd | Real estate | 2024 |
| Jindu Property Management Ltd | Construction | 2024 |
| Jing Catering Limited | Hospitality | 2025 |
| Jing Food Limited | Hospitality | 2021 |
| Jing Investments Limited | Real estate | 2011 |
| Jing Tasty Limited | Hospitality | 2022 |
| Jingally Logistics Ltd | Transport & logistics | 2025 |
| Jingjing B & B Ltd | Hospitality | 2022 |
| Jinseon Catering Management Limited | Hospitality | 2017 |
| Jinway Global Limited | Wholesale & retail | 2025 |
| Jipay Limited | Financial services | 2025 |
| Jipl Ltd | Energy | 2018 |
| JIQ Education and Training Services Community Interest Company | Education | 2009 |
| Jireh Homecare Limited | Health & social care | 2017 |
| Jireh Services Ltd | Administrative & support | 2022 |
| Jirehrn Ltd | Health & social care | 2022 |
| Jiskra Ltd | Health & social care | 2014 |
| Jiss Consultant Limited | Real estate | 2021 |