| Fellowship Consulting Ltd | Lincoln | 2025 |
| Fellowship Educational Society | Basingstoke | 2006 |
| Fellowship for Classical Learning | Holborn | 2025 |
| Fellowship of God's Ambassadors CIC | London | 2025 |
| Fellowship of ST. John (U.K.) Trust Association | London | 1984 |
| Fellowship of ST. Nicholas(The) | East Sussex | 1942 |
| Fellowship of the Maple Leaf(The) | London | 1934 |
| Felly Health & Wellness CIC | Chatham | 2025 |
| Felsira Ltd | Cardiff | 2025 |
| Felt Nowt Productions CIC | Gateshead | 2020 |
| Felt Sound System CIC | London | 2025 |
| Felt Thought Psychology Ltd | Bath | 2012 |
| Feltham Arts Association Limited | Feltham | 2001 |
| Feltham Tuition Ltd | Isleworth | 2020 |
| Felton CAN - Climate and Nature Community Interest Company | Morpeth | 2021 |
| Feltonfleet School Trust Limited | Cobham | 1967 |
| Femack Training and Recruitment Consultancy Ltd | London | 2010 |
| Female Financial Freedom Limited | London | 2023 |
| Female Football Futures Limited | Maidstone | 2025 |
| Female Property Expert Limited | Swimbridge | 2022 |
| Femaura | London | 2010 |
| Femaura Akashic Masters Ltd | London | 2026 |
| Femaura Social Enterprise Ltd | London | 2008 |
| Femi Esan Global Outreach Ltd | Romford | 2019 |
| Femina Training Academy Limited | Smethwick | 2023 |
| Feminise Politics NOW Ltd | London | 2024 |
| Feminist Law Society Ltd | London | 2020 |
| Feminity CIC | Swansea | 2025 |
| Femme Coaching Limited | Norwich | 2025 |
| Femtoed Limited | Woolwich | 2020 |
| FEN Global Limited | Ilford | 2024 |
| FEN ZEN CIC | Downham Market | 2020 |
| Fencebright Limited | Basingstoke | 2004 |
| Fencers Club Ltd | Hereford | 2025 |
| Fencing and Construction Training Ltd | Redditch | 2010 |
| Fencing Hertfordshire CIC | Watford | 2016 |
| Fenella Hemus Training & Coaching Ltd | Bristol | 2024 |
| Fenella Tallon Limited | Brighton | 2004 |
| Fengsheng Limited | London | 2015 |
| Fenland Adventure Limited | Peterborough | 2020 |
| Fenland Area Community Enterprise Trust | March | 2002 |
| Fenland First AID Services Limited | Whittlesey | 2010 |
| Fenland Sustainable Futures CIC | March | 2026 |
| Fenland Youth Radio CIC | Peterborough | 2020 |
| Fenland Youth Work Network CIC | March | 2025 |
| Fennellys Driving School Ltd | Harlow | 2018 |
| Fenside Community Centre | Boston | 2006 |
| Fentro CIC | Pontypridd | 2025 |
| Fenwick Consulting Limited | East Lothian | 2007 |
| Feoh Medical Aesthetics Ltd | London | 2024 |
| Feral Science Limited | Ashby-De-La-Zouch | 2019 |
| Feral State School CIC | Folkestone | 2026 |
| Ferdinand Soccer Academy Ltd | London | 2024 |
| Ferenczi Consulting Ltd | London | 2026 |
| Ferg Griffin Drums Limited | Gloucestershire | 2021 |
| Ferguson & Ferguson the Online Tutoring Co Limited | Barnet | 2019 |
| Fergusons Music Ltd | Irvine | 2015 |
| Fermanagh Rural Community Initiative | Enniskillen | 1992 |
| Fermanagh School of Music CIC | Enniskillen | 2025 |
| Fermanagh Stage School CIC | Enniskillen | 2025 |
| Fermanagh Youth Choir CIC | Enniskillen | 2025 |
| Fermanagh-University Partnership Board Limited | Co. Fermanagh | 1999 |
| Fermata Development Solutions Limited | Wallasey | 2016 |
| Fermentista Ltd | London | 2025 |
| Fern Academy Trust | Hereford | 2024 |
| Fern Education and Training Limited | Birmingham | 2020 |
| Fern Hill Montessori Ltd | Orpington | 2013 |
| Fern Hollow Limited | Park Cramlington | 2004 |
| Fernbank Nursery Ltd | Blackburn | 2003 |
| Ferndale House School Ltd | Worthing | 2026 |
| Ferndown Pre-School Ltd | Ferndown | 2015 |
| Fernhill School Limited | Glasgow | 1972 |
| Ferniegair Driver Tuition Limited | Hamilton | 2020 |
| Fernlea Community PRE School | Farnborough | 2011 |
| Fernlea Training Limited | London | 2025 |
| Fernwood Day Nursery Ltd | Newark | 2008 |
| Ferny Knoll Stud Limited | St. Helens | 2015 |
| Ferranti P&D Limited | Shefford | 2021 |
| Ferrars Academy | Luton | 2012 |
| Ferre Training Ltd | London | 2026 |
| Ferriby Marine Limited | Barton-Upon-Humber | 1994 |
| Ferry Boat Arts CIC | Neath | 2025 |
| Ferry Path Education Ltd | Cambridge | 2024 |
| Ferso Global for Rising Societies CIC | Glasgow | 2025 |
| Fertility in Community Limited | Croydon | 2013 |
| Fertility Matters at Work CIC | Mansfield | 2021 |
| Fertility Support Training Ltd | Dunstable | 2017 |
| Fertility-Fit Ltd | Broxbourne | 2024 |
| Fertilizer Academy Limited | Bracknell | 2022 |
| Ferus Animi // Terra Nova Ltd. | London | 2023 |
| Feruzbegim International Development and Security Association | London | 2019 |
| FES Education Consultants UK Ltd | Rainham | 2021 |
| Fess Training Group Limited | Caerphilly | 2024 |
| Fessa Projects Limited | Birmingham | 1995 |
| Fessqual Limited | Caerphilly | 2021 |
| Festival at the Edge | Dereham | 2000 |
| Festival Church Trust Limited | Ebbw Vale | 1995 |
| Fesvebi Ltd | Grays | 2025 |
| Fet-Lor Youth Club | | 1997 |
| Fetch Club Training Limited | Bedford | 2022 |