| Join UNI Today Limited | Dagenham | 2025 |
| Joined UP Skills CIC | Northwich | 2026 |
| Joiness Ltd | London | 2025 |
| Joint Audio Media Education Services Ltd | Leatherhead | 2006 |
| Joint Colleges Nursery (Cambridge) Limited(The) | Cambridge | 1980 |
| Joint Council for Qualifications CIC | London | 2013 |
| Joint Independent Group for Study and Action Limited | Newry | 1996 |
| Joio Resources Ltd | Aberdare | 2021 |
| Jokersson Sports & Medical Ltd | Cardiff | 2021 |
| Jokings Educare Ltd | Leicester | 2012 |
| Jokings International College Limited | Leicester | 2012 |
| Joko Ltd | London | 2019 |
| Joland Training and Consultancy Ltd | Romford | 2022 |
| Jolf CIC | Dartmouth | 2012 |
| Jolie Music Ltd | Sidcup | 2024 |
| Jolley Ventures UK Ltd | London | 2025 |
| Jollification CIC | Lincoln | 2023 |
| Jolly Giraffes Day Nursery Limited | Leeds | 2004 |
| Jolly Good Communities C.I.C. | Barnsley | 2018 |
| Jolly Gymnastics Limited | Norwich | 2023 |
| Jolly Jumpers Limited | Epsom | 2009 |
| Jolly Kids Day Nursery Ltd | Enfield | 2011 |
| Jolly Roger Sailing Limited | Southampton | 2016 |
| Jolly Steppers Limited | Warrington | 2017 |
| Jolly Swim School Ltd | Cullompton | 2025 |
| Jolly Time Nursery Limited | Edgware | 2015 |
| Jolly Tots Day Nursery Limited | Greenford | 2016 |
| Jolly Tots Pre-School Nursery Limited | West Yorkshire | 2007 |
| Jomaj Studios Presents JK Community Martial Arts CIC | London | 2026 |
| Jomash Ventures Ltd | Birmingham | 2023 |
| Jomema CIC | London | 2026 |
| Jomy Limited | Newbury | 2020 |
| JON Bailey PT Services Ltd | London | 2026 |
| JON Frostick Educational Consultants Limited | London | 2018 |
| JON Hillyard Training Ltd | Northampton | 2021 |
| JON Knowles Training Limited | Hebden Bridge | 2011 |
| JON Owen Ltd | Carlisle | 2026 |
| Jonah's Project CIC | Birmingham | 2017 |
| Jonathan Bach and Associates Ltd | Wembley | 2011 |
| Jonathan Baxter English Ltd | Castlederg | 2024 |
| Jonathan Baxter Limited | Shipley | 2026 |
| Jonathan Bond Educational Consultancy Limited | Braintree | 2014 |
| Jonathan Duley Ltd | Budleigh Salterton | 2023 |
| Jonathan Hannam Ltd | Ringwood | 2014 |
| Jonathan Hawkins Ltd | East Dunbartonshire | 2005 |
| Jonathan James Pathways Limited | Whitley Bay | 2025 |
| Jonathan Tinnacher Consulting Ltd. | Harrow | 2016 |
| Jonejare Limited | London | 2013 |
| Joneli Ltd | London | 2025 |
| Jones and Carvill Ltd | Waterlooville | 2021 |
| Jones and Jones Consultancy Ltd | Cardiff | 2018 |
| Jones Badminton Academy Limited | Stockbridge | 2025 |
| Jones Health, Fitness and Lifestyle Ltd | Swansea | 2023 |
| Jones J Ltd | Portsmouth | 2025 |
| Jones JR Sports Ltd | Craigavon | 2024 |
| Jones-Evans Consulting Ltd | Llangefni | 2022 |
| Jonesfoundation | Wolverhampton | 2024 |
| Jonk Thinking and Learning Limited | Brighton | 2018 |
| Jonny Bradley Ltd | Norwich | 2018 |
| Jonny Cater Cricket Academy Ltd | Buckingham | 2022 |
| Jonny KAY Consultancy Limited | Lewes | 2026 |
| Jonny's Life Skills Limited | Carrickfergus | 2023 |
| Jono Sova Jono Seba (Jsjs) Ltd. | Birmingham | 1997 |
| Jonosheba Group Ltd | Oldham | 2022 |
| Jonx Productions Ltd | Bristol | 2020 |
| Joof Ltd | Sheffield | 2024 |
| Joogynet Ltd | Windsor | 2009 |
| Jooma AI Ltd | London | 2026 |
| Joomp CIC | Stanmore | 2019 |
| Joona Limited | Dartford | 2010 |
| Jophiel Ltd | Cheltenham | 2014 |
| Jophy Ltd | Gravesend | 2009 |
| Jopling Consulting Ltd | Huddersfield | 2023 |
| Jopson Music Academy Limited | Preston | 2013 |
| Jord Hammond's Academy of Photography Ltd | Worthing | 2020 |
| Jordan Ashley Coaching Limited | Clacton-On-Sea | 2026 |
| Jordan Bazzone Golf Ltd | Milton Keynes | 2023 |
| Jordan Capital Ltd | Halstead | 2021 |
| Jordan Cross Initiative | London | 2025 |
| Jordan Educational Services Ltd | Kenley | 2015 |
| Jordan L Jones Limited | Swansea | 2024 |
| Jordan Massey Golf Ltd | Northwich | 2024 |
| Jordan Music Workshops Limited | Coulsdon | 2011 |
| Jordan Oliver Education Ltd | London | 2015 |
| Jordanhill School | Glasgow | 1987 |
| Jordon N Kaine Ltd | London | 2025 |
| Jorellix Ltd | Cardiff | 2025 |
| Joreto Limited | Stanford-Le-Hope | 2024 |
| Jorla Integrated Services Ltd | Dagenham | 2025 |
| Jorlon Ltd | Cardiff | 2025 |
| Jorojack Ltd | London | 2025 |
| Jorvantis Ltd | Cardiff | 2025 |
| Jorvik Training Limited | Wirral | 2008 |
| JOS Education Limited | Thornton Cleveleys | 2017 |
| Josef Sykora Limited | Ashford | 2019 |
| Joseph Lanzante Training Limited | Clitheroe | 2015 |
| Joseph Leadership Academy Limited | Huddersfield | 2019 |
| Joseph Lyons Personal Tuition Services Ltd | London | 2024 |
| Joseph Rufino Cordeiro Foundation Ltd | Ashford | 2022 |
| Josephine Durling Limited | London | 2005 |