| JMR Carparts Ltd | Wholesale & retail | 2024 |
| Jmsard Limited | Transport & logistics | 2020 |
| JMW Plastering Ltd | Construction | 2023 |
| JN Bargains Ltd | Wholesale & retail | 2025 |
| Jnbg Ltd | Hospitality | 2024 |
| JNC Landscape Gardening Ltd | Other services | 2023 |
| Jndent Ltd | Real estate | 2025 |
| JNK Designs Ltd | Manufacturing | 2024 |
| Jnpsons Limited | Professional & scientific | 2024 |
| JO Beth Floral Design Limited | Extraterritorial | 2021 |
| JO Pipefitter Ltd | Construction | 2019 |
| JO Thompson Landscape and Garden Design Limited | Professional & scientific | 2013 |
| Joakraft Limited | Professional & scientific | 2025 |
| Joanne Jones Limited | Professional & scientific | 2009 |
| Joanne Thorpe Consulting Limited | Professional & scientific | 2026 |
| Joanti Group Ltd | Wholesale & retail | 2025 |
| JOB Done Environmental Ltd. | Administrative & support | 2022 |
| Joco Ltd | Manufacturing | 2020 |
| Jodie Amber Studios Limited | Other services | 2024 |
| JOE Hughes International Limited | Wholesale & retail | 2013 |
| JOE Ledley Football Academy Limited | Arts & recreation | 2017 |
| JOE the Handyman Ltd | Other services | 2018 |
| Joel CAS Investments Limited | Real estate | 2025 |
| Joel Garner Cameras Ltd | Information & communication | 2023 |
| Joel Paul Developments Ltd | Other services | 2017 |
| Joeseppi Ltd | Information & communication | 2022 |
| Jofro Consultants Limited | Administrative & support | 2011 |
| Jogara Ltd | Manufacturing | 2018 |
| JOH Ltd | Real estate | 2025 |
| Johal & Associates Limited | Professional & scientific | 2003 |
| Johal Associates Limited | Extraterritorial | 2011 |
| Johal Brother Construction Ltd | Real estate | 2025 |
| Johal DE23 #1 Ltd | Real estate | 2020 |
| Johal Enterprises Ltd | Real estate | 1997 |
| Johal Mills Derby Ltd | Real estate | 2025 |
| Johal Properties (Derby) Ltd | Real estate | 2021 |
| Johal Property & Investments Limited | Real estate | 2015 |
| Johal Property Investments (Derby) Ltd | Financial services | 2020 |
| Johal Property Lettings Ltd | Real estate | 2026 |
| John and John Limited | Wholesale & retail | 1999 |
| John Booth Arboricultural Consultants Ltd | Agriculture & fishing | 2007 |
| John Bowler Pullets and Feeds LLP | | 2008 |
| John C Hinson Limited | Financial services | 2012 |
| John Church Planning Consultancy Limited | Professional & scientific | 2003 |
| John Cooper Derby Ltd | Wholesale & retail | 2010 |
| John DAS Limited | Administrative & support | 2012 |
| John G & Co Ltd | Other services | 2013 |
| John Gray Service Charges Ltd | Real estate | 2009 |
| John Hastie of Greenock Limited | Professional & scientific | 1976 |
| John L Morgan & Sons Limited | Construction | 2015 |
| John Leney and Associates Limited | Real estate | 2011 |
| John Lowe Sports Enterprises Limited | Arts & recreation | 1977 |
| John Lynch Building Contractors Limited | Wholesale & retail | 2005 |
| John Port Travel Management Limited | Transport & logistics | 2014 |
| John R.Shenton Developments Limited | | 1972 |
| John Simpson (Nottingham) Limited | Health & social care | 2010 |
| John Smith (Melbourne) Limited | Wholesale & retail | 1984 |
| John Sutcliffe Limited | Professional & scientific | 2014 |
| John T. Wigginton Limited | Financial services | 2003 |
| John Whitehurst Limited | Manufacturing | 2008 |
| John's Framing Service Ltd | Wholesale & retail | 2013 |
| Johns & Co Property Group Ltd | Real estate | 2025 |
| Johns & Co Property Holdings Ltd | Financial services | 2025 |
| Johns & Co Property Services Ltd | Real estate | 2023 |
| Johns Trsry Limited | Construction | 2021 |
| Johnson & Feather Developments Limited | Real estate | 2016 |
| Johnson & Johnson (London) Ltd | Construction | 2014 |
| Johnson 139 Limited | Financial services | 2024 |
| Johnson Amoo Consultancy Limited | Other services | 2013 |
| Johnson Enterprises Limited | Financial services | 2018 |
| Johnson Homes Derby Ltd | Households | 2024 |
| Johnson Tidsall Limited | Professional & scientific | 2013 |
| Johnson Tidsall Trustee Limited | Professional & scientific | 2026 |
| Johnson's Bazaar Ltd | Wholesale & retail | 2020 |
| Johnsons UK Services Limited | Transport & logistics | 2013 |
| Joineryline Pro Limited | Construction | 2026 |
| Joint Profit Enterprises Ltd | Wholesale & retail | 2004 |
| Jokach Properties Limited | Real estate | 2005 |
| Joker VIP Ltd | Wholesale & retail | 2024 |
| JOL Developments Ltd | Financial services | 2025 |
| JOL Ventures a Ltd | Real estate | 2026 |
| JOL Ventures B Ltd | Real estate | 2026 |
| Jolaaccessories Ltd | Wholesale & retail | 2018 |
| Joma Care Limited | Health & social care | 2014 |
| JON Colley Services Ltd | Manufacturing | 2010 |
| JON Cripwell Photography Ltd | Professional & scientific | 2021 |
| JON Daniels Ltd | Administrative & support | 2015 |
| JON E. G. (UK) Limited | Wholesale & retail | 1996 |
| JON Edwards Services Ltd | Construction | 2021 |
| JON Paul Formal Menswear Ltd | Administrative & support | 2026 |
| JON Peters Limited | Administrative & support | 2002 |
| JON R Boam Limited | Information & communication | 2020 |
| Jones & Co Consulting Group Ltd | Information & communication | 2025 |
| Jones & Co Property Development Limited | Construction | 2017 |
| Jones & Co. Luxury Ltd | Wholesale & retail | 2025 |
| Jones Property and Letting Limited | Real estate | 2018 |
| Jood Ltd | Wholesale & retail | 2025 |
| Jordan James Electrical Engineering Limited | Manufacturing | 2020 |
| JOS Software Ltd | Information & communication | 2022 |
| Joseph Group PVT Ltd | Wholesale & retail | 2020 |