| Jaguar Markets Ltd | Financial services | 2025 |
| Jaharaz Ltd | Administrative & support | 2025 |
| Jahguide Security Limited | Administrative & support | 2025 |
| JAI Laxmi Mata Properties Ltd | Real estate | 2022 |
| JAI Ambe Independent Jewellery Appraisers Ltd | Administrative & support | 2004 |
| JAI Ambe Jogiya Limited | Real estate | 2020 |
| JAI Ambe Services Ltd | Real estate | 2017 |
| JAI Avad Group Ltd | Wholesale & retail | 2022 |
| JAI Hanuman JI Ltd | Real estate | 2023 |
| JAI Jaliyan Ltd | Hospitality | 2005 |
| JAI Khodal Krupa Limited | Wholesale & retail | 2021 |
| JAI Ltd | Real estate | 2024 |
| JAI Matadi Imports Limited | Wholesale & retail | 2025 |
| JAI Matarani Holding Ltd | Financial services | 2023 |
| JAI Punia Limited | Financial services | 2018 |
| JAI Rajal Ltd | Wholesale & retail | 2022 |
| JAI Shree Sitaram Limited | Health & social care | 2014 |
| JAI Trading Limited | Hospitality | 2005 |
| Jaika International Limited | Wholesale & retail | 2016 |
| Jaikin Travels Ltd | Transport & logistics | 2025 |
| Jail UK Ltd | Real estate | 2023 |
| Jainali Ltd | Professional & scientific | 2009 |
| Jaipur Express Fish & Chips Co Limited | Hospitality | 2021 |
| Jairaaj B Coaching Ltd | Health & social care | 2021 |
| Jaitech Solutions Ltd | Wholesale & retail | 2026 |
| Jajja Transport Ltd | Transport & logistics | 2018 |
| Jajo Services Limited | Education | 2025 |
| Jajs Consultants Limited | Professional & scientific | 2022 |
| JAK (Leics) Limited | Education | 2009 |
| Jakaranda Care Limited | Health & social care | 2018 |
| Jake D Motorsports Limited | Arts & recreation | 2019 |
| Jakes Court Management Company Ltd | Households | 2010 |
| Jaket Care Limited | Health & social care | 2022 |
| Jakhar Transport Limited | Transport & logistics | 2026 |
| Jakki O'Rourke Properties (Leicester) Ltd | Real estate | 2025 |
| Jakosh Ltd | Transport & logistics | 2024 |
| JAL Healthcare Ltd | Administrative & support | 2023 |
| Jala Estates Limited | Real estate | 2017 |
| Jalandharia Limited | Manufacturing | 2025 |
| Jalaram BAL Vikas Limited | Education | 2010 |
| Jalaram Finest Limited | Manufacturing | 2018 |
| Jalaram Khaman & Sweets Ltd | Hospitality | 2024 |
| Jalaram Khaman House Limited | Hospitality | 2024 |
| Jalaram Rental Homes Ltd | Real estate | 2024 |
| Jalaram Sadavrat Trust Leicester UK | Hospitality | 2020 |
| Jalaram Sweet Centre Ltd | Wholesale & retail | 2017 |
| Jalaram's Farsans Limited | Manufacturing | 2018 |
| Jaldhara Food Ltd | Wholesale & retail | 2021 |
| Jallad Ltd | Health & social care | 2026 |
| Jalpur Millers (Wholesale) Ltd | Manufacturing | 2004 |
| Jalpur Millers Investment Limited | Real estate | 2023 |
| JAM Cargo & Logistics Ltd | Transport & logistics | 2026 |
| JAM Factory Limited | Real estate | 2017 |
| JAM Properties Holding Limited | Real estate | 2021 |
| Jamal Al-Nahr Medical Ltd | Administrative & support | 2025 |
| Jamal Holdings Limited | Professional & scientific | 2009 |
| Jamal London Ltd | Manufacturing | 2012 |
| Jamaldini Limited | Agriculture & fishing | 2025 |
| Jamaly D I Y and Hardware Limited | Wholesale & retail | 2016 |
| Jamarez Ltd | Health & social care | 2022 |
| Jambell International Limited | Wholesale & retail | 2021 |
| Jambo Properties Limited | Real estate | 2025 |
| Jambo Property Trading Ltd | Real estate | 2025 |
| Jame Butchers & Co Ltd | Wholesale & retail | 2021 |
| Jameah Academy | Education | 2007 |
| Jameela Jamroz Limited | Real estate | 2021 |
| Jameire Limited | Wholesale & retail | 2015 |
| Jamels Cafe Ltd | Hospitality | 2022 |
| James Andrews Recruitment Solutions Ltd | Administrative & support | 2009 |
| James Andrews Technology Limited | Professional & scientific | 2024 |
| James Blenkin & Partners Ltd | Real estate | 2008 |
| James Bourne Properties Ltd | Real estate | 2017 |
| James Construction (Midlands) Limited | Construction | 1999 |
| James Construction (New Homes) Limited | Construction | 2014 |
| James Dewis Enterprises Ltd | Wholesale & retail | 2026 |
| James Dobson Property Investments Ltd | Households | 2024 |
| James Elliott Associates Limited | Administrative & support | 2010 |
| James Ellis Estate Agents Limited | Real estate | 2018 |
| James Fairey Consultant Surveyor Ltd | Professional & scientific | 2023 |
| James Gamble Construction Limited | Construction | 2013 |
| James Garner Architecture Limited | Professional & scientific | 2018 |
| James Jason Limited | Real estate | 2025 |
| James Living Ltd | Real estate | 2020 |
| James Longley Property Limited | Real estate | 2018 |
| James Morey Software Limited | Information & communication | 2024 |
| James Oakland (Leicester) Limited | Other services | 2009 |
| James Parker Creative Ltd | Information & communication | 2021 |
| James Patric Management Limited | Professional & scientific | 2018 |
| James Poole Productions Limited | Professional & scientific | 2020 |
| James Sellicks (Market Harborough) Limited | Real estate | 2004 |
| James Sellicks Holdings Ltd | Real estate | 2022 |
| James Stanley Financial Services Limited | Financial services | 2011 |
| James W GAS Ltd | Construction | 2021 |
| James Worth Ltd | Real estate | 2026 |
| James' Community Arts Community Interest Company | Wholesale & retail | 2025 |
| Jamesmistrymma Limited | Manufacturing | 2025 |
| Jameswooleynagshead Ltd | Hospitality | 2024 |
| Jameswooleyrichards Limited | Hospitality | 2024 |
| Jami Trading Limited | Wholesale & retail | 2017 |
| Jamie Kyle Limited | Construction | 2014 |