| Jihan Adem Ltd | Totnes | 2014 |
| Jijivisha Ltd | London | 2023 |
| Jilemjo Consulting Limited | Farnborough | 2015 |
| Jill Lorriman Ltd | Nuneaton | 2015 |
| Jill Rogers Ltd | Dunkeld | 2024 |
| Jilly Bond Ltd | Cardiff | 2020 |
| Jilo House Limited | Worcester Park | 2021 |
| Jimmy Egan's Boxing Academy CIC | Wythenshawe | 2024 |
| Jimmy Greaves Academy Ltd | Benfleet | 2018 |
| Jimmy Walker Football Ltd | Lincoln | 2020 |
| Jimmy's School of Martial Arts Limited | Bradford | 2023 |
| Jinbizinc Ltd | Penygraig, Tonypandy | 2022 |
| Jinc Beauty Ltd | Ipswich | 2018 |
| Jingle Jungle Ltd | London | 2015 |
| Jingling Lane Training Ltd | Carnforth | 2022 |
| Jingu Limited | London | 2017 |
| Jingyou-Edu Ltd | London | 2018 |
| Jinhaeng (Progress) CIC | Arnold | 2019 |
| Jinnah Foundation | Morden | 2016 |
| Jinsei Dojo CIC | Wigan | 2024 |
| Jinstar Global Education Group Ltd | London | 2013 |
| JIO Meta Ltd | London | 2023 |
| JIQ Education and Training Services Community Interest Company | Birmingham | 2009 |
| Jireh Avodah Consulting Ltd | Croydon | 2023 |
| Jireh Training Limited | London | 2023 |
| Jisa Ventures Ltd | Leyland | 2025 |
| JIT Cecil Limited | London | 2021 |
| JIT Education Limited | Holywood | 2018 |
| JIU Jitsu Abingdon Ltd | Cockermouth | 2026 |
| JIU Jitsu East Bristol Ltd | Stevenage | 2023 |
| Jiu-Jitsu Ltd | Preston | 2021 |
| Jiuyi Education Ltd | Mildenhall | 2025 |
| Jive Stylistic Ltd | Doncaster | 2022 |
| JJ Arts Limited | Stone | 2025 |
| JJ Business Consultancy Services Ltd | Chingford | 2020 |
| JJ Coaching Consultancy Ltd | Merthyr Tydfil | 2025 |
| JJ Devon Limited | Poole | 2021 |
| JJ Driving Tuition Limited | Stratford-Upon-Avon | 2024 |
| JJ Football Coaching Ltd | Sutton Coldfield | 2022 |
| JJ Football Ltd | Shrewsbury | 2025 |
| JJ O'Donnell Elite Football Academy Limited | Gateshead | 2018 |
| JJ Prof Ventures Limited | Lymm | 2016 |
| JJ ROB Limited | London | 2022 |
| JJ Sports Community C.I.C. | Newcastle Upon Tyne | 2026 |
| JJ Swim School (Long Buckby) Limited | Daventry | 2022 |
| Jj's Early Explorers Ltd | Runcorn | 2019 |
| Jj's Enterprises Norfolk Limited | Fakenham | 2021 |
| Jj's Motorcycle Training Limited | St. Ives | 2014 |
| Jjaada Academy Online Courses Limited | London | 2017 |
| JJB Driving School Ltd | Attleborough | 2024 |
| JJB Wellness Centre Ltd | Doncaster | 2024 |
| JJC Services Ltd | Romford | 2024 |
| Jjcs Limited | Dunmow | 2013 |
| JJF Health & Education Services Ltd | Wirral | 2015 |
| Jjfe Consulting Limited | Loughton | 2018 |
| JJH Consultancy Ltd | Hitchin | 2025 |
| JJL Enterprise Ltd | Orpington | 2025 |
| JJO Early Years Limited | West Malling | 2022 |
| JJP Sports and Education Ltd | Doncaster | 2026 |
| Jjpd Elite ED Ltd | Sidcup | 2022 |
| Jjrob LDN Community Interest Company | London | 2022 |
| JJS Education Services Limited | York | 2018 |
| JJS Empowerment CIC | North Walsham | 2026 |
| JJS Marketing Ltd | Cardiff | 2023 |
| JJS Professionals Limited | Greenhithe | 2022 |
| JJS Sports Coaching Ltd | Kingswinford | 2025 |
| JJS TPG Group Ltd | Cardiff | 2021 |
| JJS Training Solutions Ltd | Liverpool | 2010 |
| JJS Tuition Basildon Limited | Basildon | 2017 |
| JJS Tuition Benfleet Limited | Leigh On Sea | 2015 |
| JJS Tuition Limited | Leigh On Sea | 2011 |
| Jjsk (Yorkshire) Limited | Leeds | 2016 |
| Jjsk Primary Limited | Leeds | 2021 |
| Jjsk Secondary Limited | Leeds | 2021 |
| Jjtraining(Uk) Limited | Glossop | 2011 |
| JJU Training Limited | Preston | 2024 |
| Jjvk Limited | London | 2022 |
| JJW Academy Limited | Sutton | 2020 |
| JK Analytics Limited | Leamington Spa | 2021 |
| JK Automotive Training Solutions Limited | Brackley | 2022 |
| JK Driving School Limited | Nottingham | 2025 |
| JK Education Agent Ltd | London | 2025 |
| JK Healthcare Training & Consultancy Limited | Nottingham | 2019 |
| JK Kids Home Education Ltd | Bradford | 2025 |
| JK Performance Ltd | Rochester | 2025 |
| JK Psychology Ltd | Cheltenham | 2024 |
| JK Rugby Coaching & Mentoring Ltd | Salisbury | 2020 |
| JKB Coaching & Education Ltd | Blackburn | 2023 |
| Jkbnanny Limited | Stevenage | 2024 |
| JKD Education Ltd | Wirral | 2018 |
| JKD Kali Abingdon Ltd | Cockermouth | 2026 |
| Jkdtraining Ltd | Birmingham | 2024 |
| JKF Driving School Ltd | London | 2012 |
| JKI Insights Ltd | Weston-Super-Mare | 2025 |
| JKL Pro Beauty and Aesthetics Academy Ltd | Middlesbrough | 2023 |
| JKM Swimschool Loughborough Ltd | Loughborough | 2024 |
| JKM Swimschool Shepshed Ltd | Loughborough | 2024 |
| JKM Swimschool Warwickshire Ltd | Hinckley | 2024 |
| Jknk Associates Limited | London | 2007 |
| Jkns Education Ltd | Ilford | 2024 |