| Jgre Holdings Limited | Financial services | 2022 |
| Jgre Investments Limited | Real estate | 2024 |
| Jgre Limited | Real estate | 2022 |
| JH Care Consultancy Ltd | Professional & scientific | 2025 |
| Jhattu Real Estate Limited | Real estate | 2021 |
| JHK Precision Ltd | Manufacturing | 2019 |
| Jhp.Performance Ltd | Wholesale & retail | 2020 |
| JHQ Services Ltd | Transport & logistics | 2025 |
| JHS Actuarial Ltd | Professional & scientific | 2022 |
| JI HAS Ltd | Transport & logistics | 2024 |
| Jiari Mart Limited | Wholesale & retail | 2023 |
| Jibrail Ltd | Construction | 2023 |
| Jiciir Limited | Wholesale & retail | 2024 |
| JIF Trading Ltd | Wholesale & retail | 2025 |
| Jigshape Ltd. | Wholesale & retail | 2012 |
| Jihan Ahmed Limited | Health & social care | 2022 |
| Jilani & Mehriya Properties Limited | Real estate | 2020 |
| Jimmy Barbers Ltd | Other services | 2024 |
| Jimmy West Company Ltd | Wholesale & retail | 2020 |
| Jimmy's Hand Car Wash Limited | Other services | 2015 |
| Jimmyz Barbers Ltd | Other services | 2026 |
| Jimtek Engineering Ltd | Information & communication | 2014 |
| Jinnah International Law Group Ltd | Professional & scientific | 2014 |
| JIO Developers Limited | Households | 2025 |
| JIS Property Investments Limited | Real estate | 2023 |
| JIS Property Leases Ltd | Real estate | 2026 |
| Jisp Care Group Ltd | Health & social care | 2026 |
| Jisp Property Limited | Real estate | 2018 |
| Jisp Technologies Ltd | Information & communication | 2025 |
| JIT Contractors Ltd | Construction | 2025 |
| Jiva Healthcare Property Ltd | Real estate | 2009 |
| Jivamed Pharmaceuticals Limited | Wholesale & retail | 2026 |
| JJ Foods Peascod Street Ltd | Hospitality | 2025 |
| JJ Foods Slough Ltd | Hospitality | 2023 |
| JJ Holy Homes Limited | Real estate | 2024 |
| JJ Tokoda Private Ltd | Health & social care | 2024 |
| JJD LLP | | 2007 |
| Jjesk Ltd | Real estate | 2022 |
| Jjess Ltd | Information & communication | 2026 |
| Jjje Limited | Construction | 2021 |
| Jjll Ltd | Wholesale & retail | 2019 |
| JJS Decor Solutions Limited | Information & communication | 2019 |
| JK Chahal Limited | Transport & logistics | 2024 |
| JK London Properties Limited | Real estate | 2021 |
| JK LUX Ltd | Transport & logistics | 2024 |
| JK Nails Village Ltd | Other services | 2023 |
| JK Plumb GAS and Electrics Ltd | Construction | 2011 |
| JK Properties Investment UK Limited | Real estate | 2025 |
| JK Randhawa Ltd | Transport & logistics | 2025 |
| JKC Immigration Services Limited | Professional & scientific | 2025 |
| Jkcd Ltd | Professional & scientific | 2021 |
| JKD 8 Consultancy Ltd | Administrative & support | 2024 |
| JKD Care Services Limited | Health & social care | 2023 |
| JKDEOL86 Limited | Real estate | 2025 |
| JKH Bodyshop Ltd | Wholesale & retail | 2018 |
| JKL Logistics Ltd | Transport & logistics | 2025 |
| JKO Group (London) Ltd | Transport & logistics | 2017 |
| JKS Transportation Ltd | Transport & logistics | 2023 |
| JL IT Consulting Ltd | Information & communication | 2013 |
| JL Star Transport Ltd | Transport & logistics | 2023 |
| JLA Swim School Ltd | Arts & recreation | 2017 |
| JM Commercial Consultancy Ltd | Professional & scientific | 2026 |
| JM Groundworks Limited | Administrative & support | 2013 |
| JM Homedesign Ltd | Construction | 2017 |
| JM Management & Consultancy Ltd | Professional & scientific | 2025 |
| JM Residential Services Ltd | Water & waste | 2024 |
| Jmac Solutions Limited | Administrative & support | 2015 |
| Jmammens Limited | Health & social care | 2022 |
| JMC Groundworks & Demolition Ltd | Construction | 2015 |
| Jmdjsk Ltd | Information & communication | 2025 |
| Jmjd Ltd | Construction | 2025 |
| JML BK Ltd | Extraterritorial | 2022 |
| JMN (Management Consultancy) Limited | Professional & scientific | 2007 |
| JMO Cardiff Ltd | Administrative & support | 2026 |
| Jmose Limited | Information & communication | 2019 |
| JMP Consultants 78 Ltd | Professional & scientific | 2025 |
| JMR Easie Investment Ltd | Real estate | 2024 |
| JMS Recordz Worldwide Production House Limited | Information & communication | 2022 |
| JMS Star Music Records UK Limited | Information & communication | 2023 |
| Jmsestore Ltd | Wholesale & retail | 2022 |
| JMX Advisory Limited | Professional & scientific | 2025 |
| Jncm Ltd | Transport & logistics | 2011 |
| JNK Consulting Services Ltd | Professional & scientific | 2023 |
| JNK Healthcare Ltd | Health & social care | 2024 |
| Jnnybyte Ltd | Construction | 2024 |
| JNS Auto Services Limited | Wholesale & retail | 2019 |
| JNS Care Holdings Ltd | Health & social care | 2018 |
| JNS Education Consultant (UK) Limited | Education | 2009 |
| JO Mobile Tyres Ltd | Wholesale & retail | 2018 |
| Joamar (UK) Ltd | Transport & logistics | 2014 |
| Joao Fernandes Ltd | Manufacturing | 2018 |
| JOB Done Solutions Ltd. | Information & communication | 2016 |
| Jobemo Ltd | Professional & scientific | 2020 |
| Jobfellas Ltd | Administrative & support | 2016 |
| Jobsdiem Ltd | Administrative & support | 2019 |
| Jocap Limited | Health & social care | 2024 |
| Jodha Josan Construction Ltd | Construction | 2023 |
| JOE Soft Limited | Information & communication | 2014 |
| Joes Folly Ltd | Construction | 2024 |
| Johal Assets Ltd | Real estate | 2026 |