| Foundation for Science, Technology and Civilisation UK | Manchester | 2014 |
| Foundation for Transformational Leadership | London | 2011 |
| Foundation Futures Community Interest Company | Newcastle Upon Tyne | 2014 |
| Foundation Mental Health Limited | Leeds | 2024 |
| Foundation of Light | Sunderland | 2001 |
| Foundation of Progress CIC | London | 2024 |
| Foundation School of Martial Arts Limited | Liverpool | 2015 |
| Foundation Years Nurseries Debdale Ltd | Knutsford | 2013 |
| Foundational Years CIC | Newcastle Upon Tyne | 2026 |
| Foundations 4 the Future C.I.C. | Birmingham | 2017 |
| Foundations Community Pre-School Ltd | Woking | 2010 |
| Foundations First Education Limited | Coulsdon | 2023 |
| Foundations for People | Bradford | 2010 |
| Foundations Nursery Limited | Batley | 2017 |
| Foundations of Buddhist Thought CIC | Skipton | 2019 |
| Founders & Coders C.I.C. | London | 2015 |
| Founders Hive Ltd | Harrow | 2023 |
| Founding Futures CIC | Cheltenham | 2024 |
| Foundlearn Limited | Erith | 2026 |
| Foundry Climbing Coaching Ltd | Sheffield | 2015 |
| Foundry Creative Alchemy Ltd | Motherwell | 2019 |
| Foundry Lane Preschool Limited | Eastleigh | 2023 |
| Foundry Pathways CIC | Middlesbrough | 2026 |
| Foundry Tuition Ltd | Harrogate | 2022 |
| Foundry X Group Ltd | London | 2026 |
| Fountain Early Years Holdings Ltd | London | 2019 |
| Fountain Farm Children's Nursery Limited | Bridlington | 2008 |
| Fountain Head House School Limited | Nottingham | 2020 |
| Fountain Montessori Pre-School Limited | London | 2006 |
| Fountain of Hope Sanctuary | Wellingborough | 2018 |
| Fountain of Knowledge Montessori Nursery School Ltd | Bugbrooke | 2002 |
| Fountain of Life Ministry Limited | London | 2022 |
| Fountain OUT of School Club Limited | Leeds | 2010 |
| Fountain Tajweed CIC | London | 2026 |
| Fountains of Life Educational Services Ltd | London | 2019 |
| Fountnursery Ltd | Welwyn Garden City | 2014 |
| Four Candles Performance Development Ltd | Lincoln | 2012 |
| Four Counties Training Limited | London | 1993 |
| Four Daughters Charitable Trust | London | 2012 |
| Four Echoes Limited | Newton Abbot | 2022 |
| Four Gates Ltd | Edinburgh | 2022 |
| Four Hares Ltd | Truro | 2020 |
| Four Hills Education Trust | Telford | 2025 |
| Four Hills Ltd | Middlesex | 2007 |
| Four Oaks Learning Trust for Excellence | Sutton Coldfield | 2013 |
| Four Paws Groom School Limited | Northwich | 2014 |
| Four Rainbows Training Ltd | Runcorn | 2019 |
| Four Reasons Training Academy Limited | Hull | 2025 |
| Four Rivers Multi Academy Trust | Stockport | 2024 |
| Four Seasons at Spectrum Limited | Glasgow | 2007 |
| Four Seasons Forest School Limited | London | 2019 |
| Four Seasons Nurseries (Scotland) Limited | Glasgow | 1994 |
| Four Seasons Nursery & Pre-School CIC | Welwyn Garden City | 2023 |
| Four Shires Training Limited | Telford | 2013 |
| Four Square People Services Limited | Cardiff | 2016 |
| Four Stones Gateway Trust | Kidderminster | 2014 |
| Four Storey Training Ltd | Merseyside, Liverpool | 2023 |
| Four Winds Forest School Ltd | Nuneaton | 2023 |
| Fouronebravo Training Ltd | Hereford | 2023 |
| Fourseasons Outdoor CIC | Blackburn | 2023 |
| Fourteen-A Limited | Cardiff | 2008 |
| FOURTEEN19 Social CIC | Castleford | 2014 |
| Fourth Monkey Education Limited | London | 2015 |
| Fourthrev Ltd | London | 2019 |
| Fourwheeldrive York Ltd | Bedford | 2023 |
| Fouz Schools | London | 2021 |
| Fowaa Enterprise Limited | London | 2023 |
| Fowler's Martial Arts Academy Ltd | Daventry | 2023 |
| Fowler’S Driving School Ltd | Great Yarmouth | 2025 |
| FOX Cycling Franchising Ltd | Bristol | 2018 |
| FOX DEN Nursery Ltd | Hemel Hempstead | 2024 |
| FOX Exhibitions Limited | Sidcup | 2025 |
| FOX Glen Education Ltd | London | 2025 |
| FOX House Preschool and Nursery Ltd | Sevenoaks | 2006 |
| FOX Learning Ltd | London | 2026 |
| FOX Legal Training Ltd | London | 2022 |
| FOX Pioneer Centre Limited | High Wycombe | 2020 |
| FOX Soccer Academy Ltd | Leicester | 2016 |
| FOX Social Enterprise CIC | Leeds | 2021 |
| FOX Sport Performance Ltd | Abingdon | 2023 |
| FOX Tale Tuition Ltd | Rochester | 2020 |
| FOX Teach Limited | Nuneaton | 2016 |
| FOX Training Solutions Ltd | Market Drayton | 2019 |
| FOX WBC Ltd | Burnham-On-Sea | 2025 |
| FOX Wood Forest School | Roydon | 2016 |
| Foxbox Ltd | London | 2025 |
| Foxes' Retreat Limited | Bury St.Edmunds | 2019 |
| Foxfield Consultancy Ltd | Chatham | 2018 |
| Foxglove Meadows Ltd | Solihull | 2025 |
| Foxhole Community Garden C.I.C. | Totnes | 2015 |
| Foxstar Group Ltd | Abingdon | 2026 |
| Foxton Pre-School | Cambridge | 2008 |
| Foxtrot Delta Limited | Hitchin | 2010 |
| Foxwood Academy | Nottingham | 2012 |
| Foxwood Panyard Limited | Leeds | 2026 |
| Foyle International Ltd | Springrowth Business Park | 2008 |
| Foyle River-Catchment Outdoor Group (Frog) C.I.C. | Strabane | 2021 |
| FP Educational Services Ltd | Shepperton | 2026 |
| FPA Sports & Education CIC | Liverpool | 2024 |
| FPF Academy Group Limited | Redditch | 2025 |