| J S C K Limited | Castleford | 2012 |
| J S Educational Limited | Preston | 2015 |
| J S Foster Consultancy Ltd | Bedford | 2025 |
| J S Training Services Ltd | Peterlee | 2019 |
| J Samuel Consultancy Ltd | Sale | 2026 |
| J Savage Consultancy Ltd | Okehampton | 2024 |
| J Sharp Education Ltd | Market Rasen | 2026 |
| J Star Academy of Performing Arts Limited | Manchester | 2023 |
| J T Learning Limited | Nottingham | 2013 |
| J Training Solutions Ltd | London | 2020 |
| J Urquhart Limited | Croydon | 2017 |
| J W Training Limited | Margate | 2015 |
| J Williams Tuition Limited | Hull | 2023 |
| J&A Concert Pianists Ltd | Brentford | 2020 |
| J&A Educational Consultants Limited | Brighton | 2016 |
| J&B Consultancy Ltd | West Drayton | 2025 |
| J&C Coaching Ltd | Leeds | 2025 |
| J&G Consultancy Limited | Gargrave | 2018 |
| J&J Consulting Ltd | London | 2022 |
| J&J Nurseries Limited | Harlow | 2026 |
| J&J Sports Ltd | Swadlincote | 2023 |
| J&J Training Services Ltd | Forfar | 2025 |
| J&L Logan Ltd | Guildford | 2021 |
| J&M Mackay Ltd | Edinburgh | 2024 |
| J&M Tiny Giants Ltd | London | 2025 |
| J&P ASD Management Co Ltd | Nottingham | 2014 |
| J&R Coaching Limited | Luton | 2017 |
| J&S Enterprises Limited | Poulton-Le-Fylde | 2014 |
| J&T 4LIVE Ltd. | Manchester | 2018 |
| J&V International Ltd | St Austell | 2024 |
| J'Evien Group Limited | London | 2021 |
| J'Ouvert Unified MAS Bands Incorporated Ltd | Hampton | 2023 |
| J-E-S-U-S (Jehovah Educational Support Undergraduate Services) Ltd | London | 2020 |
| J-Los Early Years Ltd | Fraserburgh | 2022 |
| J-Me Fitness Limited | London | 2019 |
| J. a. Walker Ltd | Leicester | 2018 |
| J. F. J. Training Limited | Manchester | 2008 |
| J. K. Education Ltd. | Kent | 2006 |
| J. LEE Holdings Limited | London | 2026 |
| J.A. Ross Consultancy Limited | London | 2011 |
| J.A.M School of Motoring Ltd | Harrow | 2026 |
| J.A.S Lighthouse Limited | Worcester Park | 2014 |
| J.B.O.T. UK Ltd | Chester | 2026 |
| J.C. Theory Tests Ltd | Norwich | 2007 |
| J.Coates (H.G.V. Services) Limited | Leicester | 1972 |
| J.D.Drums Ltd | Goring On Thames | 2006 |
| J.D.G Football Club Community Interest Company | Birmingham | 2010 |
| J.E.B. Educational Consultancy Limited | Rochdale | 2003 |
| J.E.L. Rail Training Ltd | Liverpool | 2026 |
| J.E.Ts Centre | Liverpool | 2012 |
| J.Heald Coaching Education Ltd | Saffron Walden | 2019 |
| J.J.'s Country Activities Limited | Gillingham | 2022 |
| J.K. Rolling & Learning Driving School Ltd | Bridgwater | 2025 |
| J.Ko Education Consulting Ltd | London | 2022 |
| J.Laver Consulting Ltd | Slough | 2020 |
| J.M Driving School Ltd | Chingford | 2022 |
| J.M White - Approved Mental Health Professional (Amhp) & Mental Health ACT Training Ltd | Frinton On Sea | 2022 |
| J.N Training & Building Ltd | Basildon | 2021 |
| J.R Beauty Training Ltd | Colchester | 2025 |
| J.R. Capital Group Ltd | Barking | 2019 |
| J.Roberts Training and Assessments Ltd | Kidwelly | 2024 |
| J.Siggers Ltd | Meopham | 2022 |
| J.V. Growth Limited | Robert Robinson Avenue | 2019 |
| J10 Performance Football Ltd | Glenrothes | 2026 |
| J2 Coaching Ltd | Leeds | 2023 |
| J2 Ventures Limited | Martinstown | 2025 |
| J21A Ltd | London | 2023 |
| J23 Education Limited | London | 2024 |
| J3J Consultancy Limited | Wilmslow | 2025 |
| J4X Limited | London | 2025 |
| J5F Coaching Limited | Belfast | 2023 |
| J9SH Ltd | Uxbridge | 2024 |
| JA Creative Limited | London | 2014 |
| JA Leadership in Education Ltd | Congleton | 2024 |
| JA Live C.I.C. | Glasgow | 2016 |
| JA Music Ltd | Leigh-On-Sea | 2019 |
| JA Pathways Ltd | London | 2025 |
| JA Swimming Academy Ltd | Stockport | 2022 |
| JA Tuition Ltd | York | 2021 |
| Jaaf Limited | Stoke-On-Trent | 2026 |
| Jaaq Limited | High Wycombe | 2021 |
| JAB Education Services Ltd | Wickford | 2013 |
| JAB First BXN Academy Limited | Hornsey | 2026 |
| JAB JAB House Ltd | Deal | 2026 |
| Jabadao | Manningtree | 1989 |
| Jabberwocky Childrens Nursery Limited | Moreton-In-Marsh | 2016 |
| Jabeen Akhtar Limited | Stourbridge | 2018 |
| Jabiz Ltd | London | 2020 |
| Jabrom Fitness Ltd. | Doncaster | 2022 |
| JAC Ecom Ltd | Crawley | 2023 |
| JAC Network Limited | London | 2020 |
| Jacalyn James Limited | Plymouth | 2020 |
| Jacappella Limited | Warrington | 2002 |
| Jacinto Sky Rise Education Ltd | London | 2024 |
| Jack & Jill Day Nursery Ltd | Abingdon | 2003 |
| Jack & Jill Pre-School Nursery Ltd | Tamworth | 2013 |
| Jack & Jill School Limited | Middlesex | 1978 |
| Jack & Jill's Nursery Ltd | Huddersfield | 1996 |
| Jack & Jill's Pre-School (Lichfield) | Lichfield | 2008 |
| Jack & Jill`S Day Nursery Limited | Woking | 2004 |