| Jack 'N' Jill PRE School Centre Limited | Elgin | 2007 |
| Jack and Jill Community Playgroup | Omagh | 2004 |
| Jack and Jill Nursery Limited | Carlisle | 2003 |
| Jack and Jill Nurserygroup Limited | Ash Vale | 2002 |
| Jack and Jill Preschool Limited | Bristol | 2008 |
| Jack and Jill's Preschool Limited | Hornchurch | 2017 |
| Jack Andrews Enterprises Ltd | Slough | 2019 |
| Jack Attack Sports Ltd | London | 2026 |
| Jack Bowers Education Ltd | Peterborough | 2018 |
| Jack Brent Ltd | Newcastle Upon Tyne | 2025 |
| Jack Browne Personal Training Ltd | Merthyr Tydfil | 2025 |
| Jack Consulting Limited | London | 2022 |
| Jack Goatcher Fitness & Performance Ltd | West Sussex | 2025 |
| Jack Haigh Coaching Ltd | Sheffield | 2022 |
| Jack Hallworth Training Limited | Wigan | 2018 |
| Jack Harvey Smith Dance Company CIC | Hull | 2025 |
| Jack Holland Fitness Limited | West Wickham | 2021 |
| Jack in the Box (Bosbury) Limited | Ledbury | 2010 |
| Jack in the Box (Day Nursery) Limited | Stoke On Trent | 2001 |
| Jack in the Box at Brockswood CIC | Kings Langley | 2019 |
| Jack in the Box Day Nursery (Wigan) Ltd | Wigan | 2014 |
| Jack in the Box Montessori School Limited | London | 2014 |
| Jack in the Box Nursery (Norfolk) Ltd | Derby | 2011 |
| Jack in the Box Nursery Limited | Kings Langley | 2016 |
| Jack in the Box Playgroup Limited | Worthing | 2010 |
| Jack in the Box Pre-School Limited | Halesowen | 2012 |
| Jack Kempton Golf Ltd | Southampton | 2024 |
| Jack Mcmillan Swim Ltd | Belfast | 2025 |
| Jack Midson Coaching Ltd | Maidstone | 2020 |
| Jack Mousley Limited | Barnet | 2021 |
| Jack of ALL Sports Limited | Wickford | 2025 |
| Jack Sherwood Racing Promotions Limited | Loughborough | 2023 |
| Jack Simpson Tennis Ltd | Luton | 2025 |
| Jack Stamp Blade Repair Training Ltd | Newport | 2022 |
| Jack UK Enterprise Ltd | Norwich | 2022 |
| Jack's Education Limited | Barking | 2025 |
| Jackafal Ltd | London | 2022 |
| Jackalope Arts CIC | Halesworth | 2024 |
| Jackamel Ltd | St.Neots | 2023 |
| Jackdaw Associates Ltd | Romford | 2019 |
| Jacked Calisthenics Limited | Salford | 2024 |
| Jacked Fitness Systems Ltd | Newcastle Upon Tyne | 2023 |
| Jackie Chapman Ltd | Harpenden | 2025 |
| Jackie Ventom Training and Consultancy Limited | Tewkesbury | 2000 |
| Jackman Education Solutions Limited | Crawley Down | 2016 |
| Jackmax Limited | Guildford | 2020 |
| Jacks Dive Chest UK Ltd | Tewkesbury | 2025 |
| Jacks Investments Limited | Edinburgh | 2024 |
| Jackson Cricket Limited | London | 2023 |
| Jackson Health and Fitness Limited | Caernarfon | 2017 |
| Jackson Psychology Associates Ltd | Birmingham | 2022 |
| Jackson Tuition Services Limited | Ruislip | 2024 |
| Jackson's Lane | | 2006 |
| Jacksons MW Academy CIC | Oldham | 2024 |
| Jaclyn Moss Training Ltd | Larbert | 2024 |
| Jacob Shenton Tutoring Limited | London | 2019 |
| Jacobs Education & Training Safety Ltd | Didcot | 2010 |
| Jacpa Ltd | Swansea | 2024 |
| Jacqadi Limited | Otford | 2018 |
| Jacqueline Baldock Limited | Sittingbourne | 2012 |
| Jacqueline Finnegan Limited | Birmingham | 2018 |
| Jacqueline Hartley Limited | Tonbridge | 2017 |
| Jacqueline Jenkins Ltd | Sanderstead | 2010 |
| Jacqueline Wheeler Tuition Ltd | London | 2023 |
| Jacqui Barnett Limited | Peterborough | 2026 |
| Jacqui Robinson Education Centre Ltd | Colchester | 2013 |
| Jacqui Testo Ltd | Reading | 2024 |
| Jact Summer Schools Trust | Saffron Walden | 2010 |
| Jact Wellness Ltd | Woodbridge | 2020 |
| Jac’S Agility Ltd | Harlow | 2025 |
| JAD Training & Education Consultants Limited | Great Yarmouth | 2021 |
| Jadamsacademy CIC | Glasgow | 2026 |
| Jadamstutor Ltd | Glasgow | 2025 |
| Jade Anderson Limited | Reading | 2026 |
| Jade Childcare Ltd | Belvedere | 2024 |
| Jade Drive Ltd | Fleet | 2025 |
| Jade Education Limited | Birmingham | 2020 |
| Jade Harris Psychology Limited | London | 2023 |
| Jade Jordan Coaching Limited | Manchester | 2025 |
| Jade Kelsall Ltd | Leeds | 2015 |
| Jade Moon Media Ltd | Bolton | 2016 |
| Jade Taussig Limited | Waterlooville | 2019 |
| Jade Tutoring Ltd | Croydon | 2024 |
| Jadeplay Ltd | London | 2026 |
| Jaderberg Krais Tutoring Limited | London | 2010 |
| Jade’S Vision Ltd | St. Helens | 2023 |
| Jadhd Coaching Ltd | London | 2025 |
| Jadip Ltd | Stoke On Trent | 2014 |
| Jafari Education Ltd | Newcastle Upon Tyne | 2024 |
| Jaffar ALI Tech Ltd | Ruislip, | 2026 |
| Jaffaria Academy Ltd | Woodford Green | 2020 |
| Jaffna Stallions Ltd | Barnet | 2020 |
| Jafko Education Limited | London | 2020 |
| Jafrabad School and College Development Organisation ( Jsacdo ) Ltd | London | 2023 |
| JAG Training Limited | Eltham | 2014 |
| Jagannatha DAS Ltd | Birmingham | 2025 |
| Jagat Gamelan CIC | London | 2024 |
| Jagdev Peak Performance Ltd | Isleworth | 2025 |
| Jagged Edge Academy Ltd | Huntingdon | 2019 |
| Jagged Social Ltd | Ramsgate | 2024 |