| Jcdata Ltd | Information & communication | 2021 |
| JCE EMY Ltd | Public administration | 2023 |
| JCE Serene Limited | Health & social care | 2023 |
| JCG Real Estate Ltd | Real estate | 2025 |
| JCH Building & Developments Ltd | Construction | 2019 |
| JCH Psychiatric Ltd | Health & social care | 2013 |
| Jcimlas Limited | Health & social care | 2018 |
| Jcjw Surgical Services Ltd | Health & social care | 2019 |
| JCL Brickwork Ltd | Construction | 2024 |
| Jcom (Old Market) Management Company Limited | Real estate | 2014 |
| Jcom Management Company Limited | Other services | 2004 |
| JCR Fourteen Limited | Administrative & support | 2021 |
| JCR Sales Limited | Wholesale & retail | 2019 |
| JCR Trade Ltd | Construction | 2020 |
| JCRAY44 Ltd | Construction | 2014 |
| Jcrew Electrical Ltd | Construction | 2014 |
| JCS (SW) Ltd | Wholesale & retail | 2015 |
| JCS Carpentry & Construction Ltd | Construction | 2026 |
| JCS Southwest Ltd | Administrative & support | 2022 |
| JCT Flooring LLP | | 2024 |
| JCW Commercial Services Ltd | Hospitality | 2017 |
| JD & Sons Roofing SW Limited | Construction | 2016 |
| JD Accountancy Practice Limited | Professional & scientific | 2018 |
| JD Cruise Limited | Financial services | 2002 |
| JD Curry Electrical Ltd | Construction | 2018 |
| JD Fire and Security Limited | Administrative & support | 2020 |
| JD Fire and Security Services Limited | Administrative & support | 2022 |
| JD Football Ltd | Wholesale & retail | 2023 |
| JD Fresh Produce Ltd | Wholesale & retail | 2012 |
| JD Furniture Atelier Ltd | Manufacturing | 2025 |
| JD Kebab Van Ltd | Hospitality | 2024 |
| JD Maintenance and Removal Ltd | Transport & logistics | 2021 |
| JD Pipe & Design Ltd | Professional & scientific | 2014 |
| JD Pro Finish Limited | Construction | 2018 |
| JD Property & Development Ltd | Construction | 2020 |
| JDA Investments Ltd | Real estate | 2010 |
| Jdandsonsgroup Ltd | Construction | 2026 |
| Jdar Retail Ltd | Wholesale & retail | 2023 |
| Jdat Ltd | Professional & scientific | 2015 |
| JDB Communications Ltd | Professional & scientific | 2025 |
| JDC Windows Limited | Construction | 2008 |
| Jdcs (SW) Ltd | Professional & scientific | 2024 |
| JDE I.T. Solutions Limited | Administrative & support | 2015 |
| JDE Sundararaj Properties Ltd | Real estate | 2025 |
| JDG London Limited | Health & social care | 2022 |
| JDH Group UK Ltd | Financial services | 2018 |
| JDH Holdings Limited | Financial services | 1996 |
| JDH Services Limited | Information & communication | 1996 |
| JDL Carpentry and Construction Ltd | Construction | 2025 |
| JDM Blinds Ltd | Construction | 2013 |
| JDM Hybrid Imports Ltd | Wholesale & retail | 2026 |
| JDN Consulting Limited | Professional & scientific | 2024 |
| JDP Heating & Plumbing Limited | Construction | 2003 |
| JDP Jungle Ltd | Information & communication | 2020 |
| JDP Medical Limited | Health & social care | 2025 |
| JDP Serengeti Ltd | Information & communication | 2010 |
| JDP SPY Ltd | Information & communication | 2019 |
| JDS Electrical Keynsham Ltd | Construction | 2015 |
| JDS Martech Consulting Ltd | Information & communication | 2025 |
| JDS56 Limited | Transport & logistics | 2022 |
| Jdsp Ltd | Construction | 2019 |
| Jdstays Ltd | Hospitality | 2025 |
| JDT Research Services Ltd | Professional & scientific | 2018 |
| JDW Creative Limited | Real estate | 2022 |
| JDW Design Consultancy Limited | Administrative & support | 2025 |
| JDW Design Limited | Professional & scientific | 2020 |
| Jdy.Care Ltd | Health & social care | 2024 |
| JE Asset Holdings Ltd | Real estate | 2020 |
| JE Asset Management Ltd | Real estate | 2017 |
| JE Cardiac Services Ltd | Health & social care | 2014 |
| JE Falk Limited | Real estate | 2022 |
| JE Jean's Limited | Hospitality | 2025 |
| Jean Christian Perfumes Limited | Manufacturing | 1997 |
| Jean Dyer Limited | Agriculture & fishing | 2015 |
| Jean's Restaurant Limited | Hospitality | 2017 |
| Jeanes Consulting Limited | Professional & scientific | 2008 |
| Jean’S Thai Mimi Mart Limited | Wholesale & retail | 2022 |
| Jeap Property Limited | Real estate | 2023 |
| Jeap Property Services Limited | Construction | 2026 |
| Jeaves Management Ltd | Real estate | 2016 |
| JEB Events Ltd | Hospitality | 2026 |
| Jebi Ltd | Financial services | 2022 |
| JEC Property Limited | Real estate | 2020 |
| Jecol Consult Ltd | Professional & scientific | 2025 |
| JED Electrical Services Ltd | Construction | 2025 |
| Jedellis Holdings Ltd | Financial services | 2026 |
| Jedi Holdings Limited | Real estate | 2019 |
| JEE & BEE Hair Beauty Ltd | Other services | 2019 |
| Jeele Care Ltd | Health & social care | 2021 |
| Jeepster Recordings Limited | Information & communication | 1995 |
| Jeetech Consulting Ltd | Information & communication | 2019 |
| Jeevan 4 Ever Ltd | Real estate | 2024 |
| Jeevan Sweets Limited | Hospitality | 2019 |
| Jeeves Convenience Stores Ltd | Wholesale & retail | 2015 |
| Jeeves Housekeeping Services Ltd | Administrative & support | 2008 |
| Jeff Cliff Model Effects Limited | Information & communication | 2003 |
| Jeff Hall Developments Limited | Real estate | 2018 |
| Jeff Parkinson Care Limited | Health & social care | 2018 |
| Jeff Way Construction Limited | Construction | 2011 |
| Jeff Way Electrical Services Limited | Construction | 1977 |