| Jonathan Paul Photography Ltd | Professional & scientific | 2026 |
| Jonathan Paulking Holdings Ltd | Financial services | 2025 |
| Jonathan Thake Limited | Professional & scientific | 2006 |
| Jonathan Todd Consultant Limited | Professional & scientific | 2012 |
| Jonathanp Vtec Ltd | Wholesale & retail | 2026 |
| Jonbro Limited | Real estate | 2024 |
| Jones & Bent Limited | | 1975 |
| Jones & ME Limited | Manufacturing | 2019 |
| Jones & Telphia-Jones Investments Ltd | Construction | 2014 |
| Jones & Telphia-Jones Property Ltd | Real estate | 2018 |
| Jones and NPA Ltd. | Information & communication | 2014 |
| Jones and Palmer Holdings Limited | Professional & scientific | 1924 |
| Jones and Palmer Limited | Manufacturing | 1929 |
| Jones and Palmer Technology Limited | Professional & scientific | 2005 |
| Jones Bros.(Tools)Limited | | 1955 |
| Jones Company Entertainments Ltd | Hospitality | 2026 |
| Jones Corp Limited | Real estate | 2025 |
| Jones Developments Worcester Ltd | Real estate | 2025 |
| Jones Enforcement Ltd | Administrative & support | 2017 |
| Jones Machines Holdings Limited | Administrative & support | 2020 |
| Jones Services Removals & Storage Ltd | Transport & logistics | 2021 |
| Jones Wealth Management Ltd | Professional & scientific | 2021 |
| Jones White Investments Ltd | Professional & scientific | 2006 |
| Jonesies Strategic Growth Limited | Other services | 2024 |
| Jonfen Ltd | Health & social care | 2011 |
| Jonic Engineering Employee Ownership Trustee Limited | Administrative & support | 2023 |
| Jonic Engineering Limited | Manufacturing | 1966 |
| Jonicenok Ltd Limited | Wholesale & retail | 2024 |
| Jonkim Limited | Professional & scientific | 2014 |
| Jonnie Hackett Consultants Limited | Administrative & support | 2017 |
| Jono Hustle & Muscle Limited | Other services | 2025 |
| Jono Sova Jono Seba (Jsjs) Ltd. | Education | 1997 |
| Jontek Limited | Extraterritorial | 1989 |
| Jonwin Limited | Administrative & support | 2020 |
| Jooglo Ltd | Wholesale & retail | 2024 |
| Joonbug Ltd | Real estate | 2022 |
| Joprtty Limited | Wholesale & retail | 2021 |
| Joptech Limited | Information & communication | 2025 |
| JOR Group Ltd | Financial services | 2020 |
| Jorahive Limited | Professional & scientific | 2019 |
| Jord's Quizzes Ltd | Arts & recreation | 2022 |
| Jordan Logistics Services Ltd | Transport & logistics | 2021 |
| Jordan Property Portfolio LLP | | 2025 |
| Jordan Sydney Homes Ltd | Real estate | 2022 |
| Jordanou & Co Limited | Professional & scientific | 2004 |
| Jordans (Leamington Spa) LLP | | 2001 |
| Jordanthorpe EV Developments Ltd | Construction | 2021 |
| Jordanthorpe Power Ltd | Construction | 2018 |
| Jordonhollis Limited | Transport & logistics | 2025 |
| Jordyn Storms Limited | Wholesale & retail | 2024 |
| Jorosa Limited | Wholesale & retail | 2025 |
| Jorsin Courier Services Ltd | Other services | 2013 |
| Jorve True Beauty Infusion Limited | Manufacturing | 2024 |
| Joryki Ltd | Wholesale & retail | 2025 |
| JOS Plant & Machinery Limited | Extraterritorial | 2011 |
| Josal EV Limited | Information & communication | 2016 |
| Josan Couriers Limited | Transport & logistics | 2024 |
| Jose Frio Sport Ltd | Arts & recreation | 2025 |
| Josef Hair & Beauty Limited | Other services | 2011 |
| Joseph Chamberlain (Trading) Limited | Arts & recreation | 1993 |
| Joseph Davis Transport Limited | Other services | 2013 |
| Joseph Group Limited | Financial services | 2007 |
| Joseph Holloway (Holdings) Limited | Financial services | 2009 |
| Joseph Jacob Developments Limited | Construction | 2023 |
| Joseph Jacob Properties & Management Limited | Real estate | 2022 |
| Joseph Jacob Properties Limited | Real estate | 2019 |
| Joseph Mews Limited | Real estate | 2023 |
| Joseph Mews Property Group Limited | Real estate | 2021 |
| Joseph Mews Sales Limited | Real estate | 2022 |
| Joseph Property Services Ltd | Construction | 2020 |
| Joseph Sloane Properties Ltd | Real estate | 2022 |
| Joseph Walton & SON (Nelson) Limited | | 1898 |
| Joseph William Place Residents Management Company Limited | Households | 2018 |
| Joseph Wright Ltd | Construction | 2025 |
| Joseph's Carpets Ltd | Construction | 2023 |
| Josephi Lettings Ltd | Real estate | 2022 |
| Josephine Patricia Ltd | Real estate | 2019 |
| Josephsengineering Ltd | Manufacturing | 2019 |
| Joseystar Ltd | Administrative & support | 2020 |
| Josh & Jake Chinnaiyan Ltd | Hospitality | 2016 |
| Josh Ayodele Consultancy Services Ltd | Wholesale & retail | 2025 |
| Josh Consultants Limited | Information & communication | 2012 |
| Josh Gauton Limited | Information & communication | 2018 |
| Josh Roddick Agricultural Contracting Limited | Other services | 2020 |
| Joshh Westgate Fish Bar Limited | Hospitality | 2021 |
| Joshjed Care Ltd | Health & social care | 2022 |
| Joshua Andre Ltd | Professional & scientific | 2020 |
| Joshua Couriers Ltd | Transport & logistics | 2016 |
| Joshua Enterprises Ltd | Professional & scientific | 2024 |
| Joshua FOX Ltd | Transport & logistics | 2025 |
| Joshua J & Co Limited | Hospitality | 2018 |
| Joshua Jordan Construction Ltd | Construction | 2020 |
| Joshua Kakar Limited | Administrative & support | 2014 |
| Joshuaabies Limited | Health & social care | 2025 |
| Josh’S Kitchen Indian Restaurant Limited | Hospitality | 2025 |
| José Frio Ltd | Manufacturing | 2023 |
| José Frio Properties Ltd | Real estate | 2024 |
| Jotalima Shipping Ltd | Transport & logistics | 2021 |
| Jotendify Private Limited | Health & social care | 2025 |
| Jothi Learning Limited | Education | 2020 |