| JD Rode Ltd | Real estate | 2016 |
| Jdav Limited | Manufacturing | 2016 |
| JDE Van Service Ltd | Transport & logistics | 2022 |
| Jdka Ltd | Financial services | 2021 |
| JDP Trading Ltd | Wholesale & retail | 2012 |
| JE Carriages Ltd | Wholesale & retail | 2025 |
| Jeade Ltd | Information & communication | 2016 |
| Jeet Properties Limited | Real estate | 2007 |
| Jefferson Taylor Ltd | Professional & scientific | 2011 |
| Jeitta Limited | Hospitality | 2019 |
| Jenever Ltd | Financial services | 2019 |
| Jenna Williams Ltd | Professional & scientific | 2023 |
| Jennifer Spencer Consultancy Limited | Arts & recreation | 2016 |
| Jerakano Limited | Professional & scientific | 2012 |
| Jeremy Davies Wealth Management LLP | | 2012 |
| Jerry Ellis Limited | Real estate | 2009 |
| Jewelcloud Computers Limited | Information & communication | 1986 |
| JF Fitzroy Limited | Real estate | 2020 |
| JF Recruitment Consulting Limited | Other services | 2017 |
| JG Courier Express Ltd | Transport & logistics | 2013 |
| JGJ Homes Ltd | Real estate | 2026 |
| JGW & ABG Ltd | Real estate | 2014 |
| Jhbuilding@Work Limited | Construction | 2016 |
| Jheck and Triple a Ltd | Wholesale & retail | 2019 |
| Jigglypig Ltd | Wholesale & retail | 2024 |
| Jilas Limited | Real estate | 2023 |
| JIM Green and SON Limited | Wholesale & retail | 2005 |
| Jimmy White’S Sports Lounge Limited | Hospitality | 2024 |
| JIT Associates Ltd | Professional & scientific | 2008 |
| Jitpur Ltd | Real estate | 2012 |
| JJ Bros Property Ltd | Real estate | 2020 |
| JJG (Surrey) Limited | Other services | 2013 |
| Jjnn Limited | Real estate | 2020 |
| JK Associate Services Ltd | Professional & scientific | 2016 |
| Jkmv Consulting Ltd | Professional & scientific | 2025 |
| JL & Sons Company Limited | Real estate | 2024 |
| JL Leigheb Property Maintenance Ltd | Construction | 2015 |
| JM Multi-Choices Ltd | Wholesale & retail | 2023 |
| Jmaa Consulting Limited | Professional & scientific | 2024 |
| Jmaa Holdings Limited | Financial services | 2025 |
| JMC Compliance Limited | Professional & scientific | 2018 |
| JMF Technical Services Ltd | Construction | 2020 |
| JMR Global Ltd | Administrative & support | 2012 |
| JMW Management Limited | Manufacturing | 2012 |
| JNC Surrey Ltd | Hospitality | 2024 |
| Joan Consulting Ltd | Information & communication | 2015 |
| Joanna Carey Interior Design Limited | Professional & scientific | 2017 |
| Joanna Davies Administration Ltd | Administrative & support | 2022 |
| Jocations Limited | Arts & recreation | 2019 |
| Jocky Trans Ltd | Transport & logistics | 2023 |
| JOE Duffy Gardens Ltd | Administrative & support | 2024 |
| JOE Karwowski Limited | Professional & scientific | 2023 |
| John B Sunley & Sons Limited | Extraterritorial | 1987 |
| John Bennett Motorsport Ltd | Arts & recreation | 2021 |
| John Chadwick CX Ltd | Information & communication | 2023 |
| John Jenkins Limited | Other services | 1996 |
| John Schroeder (Enterprises) Limited | Arts & recreation | 1972 |
| Johnsonbriggs Ltd | Information & communication | 2020 |
| Joint People Management (JPM) Logistics Ltd | Transport & logistics | 2022 |
| Jolly Good Hospitality Group Ltd | Hospitality | 2023 |
| Jomansil Ltd | Wholesale & retail | 2025 |
| JON Dibben Jewellery Limited | Manufacturing | 1997 |
| Jonags Courier Service Ltd | Transport & logistics | 2018 |
| Jonis Property Investments Limited | Real estate | 2020 |
| Jono Rae’S Maintenance and Renovations Ltd | Construction | 2018 |
| Jordan Brook UGC Ltd | Professional & scientific | 2025 |
| Jordon Sale Engineering Limited | Manufacturing | 2021 |
| Josalis Limited | Wholesale & retail | 2025 |
| Josh Siddiqui Limited | Health & social care | 2014 |
| Joslin Distribution Ltd | Transport & logistics | 2021 |
| Joule Infrastructure Ltd | Professional & scientific | 2018 |
| Jousting Limited | Hospitality | 2012 |
| JOY96 Ltd | Hospitality | 2026 |
| Joymixer Creations Limited | Information & communication | 2021 |
| Joys Consultancy Limited | Health & social care | 2020 |
| JPM Interiors Limited | Construction | 2019 |
| JR Preece Enterprises Ltd | Transport & logistics | 2025 |
| Jrmt Properties Limited | Real estate | 2021 |
| JRS Builders Ltd | Construction | 2023 |
| JS Private Client Consultancy Ltd | Professional & scientific | 2026 |
| JS TIX Limited | Wholesale & retail | 2022 |
| Jsfcs Limited | Financial services | 2019 |
| JSH Investments Ltd. | Real estate | 2002 |
| Json Minerals Ltd | Wholesale & retail | 2022 |
| JTC Event Management Ltd | Administrative & support | 2025 |
| JTF Construction Ltd | Construction | 2025 |
| JTW Energy Consulting Limited | Professional & scientific | 2026 |
| Jtwines Ltd | Hospitality | 2012 |
| Jubilee Private Equity Limited | Financial services | 2019 |
| Julia Brown Ltd | Professional & scientific | 2019 |
| Jumto Care Ltd | Health & social care | 2023 |
| Junk Music Limited | Information & communication | 2025 |
| Juno Childcare Limited | Education | 2020 |
| Juno Wind Limited | Professional & scientific | 2025 |
| Jupiter Enterprises Limited | Information & communication | 2018 |
| Jupiter Heating Systems Ltd | Wholesale & retail | 2004 |
| Just Boilers and Maintenance Ltd | Construction | 2018 |
| Just Desire Services Ltd | Transport & logistics | 2025 |
| Just Gaming Ltd | Wholesale & retail | 2019 |
| Just Homes (Surrey) Ltd | Health & social care | 2021 |