| Forget ME Knot Alpacas Anglesey C.I.C. | Llannerch-Y-Medd | 2026 |
| Forkhill Cattle Company Ltd | Newry | 2015 |
| Form & Flame Ltd | Basingstoke | 2022 |
| Forman Brothers Limited | Ulceby | 2016 |
| Forman Contracting Limited | Ashbourne | 2012 |
| Forman Engineering Limited | Peterhead | 2005 |
| Formans (GS) Limited | Peterhead | 2020 |
| Formartine Tree Surgery Ltd | Ellon | 2023 |
| Formby Dog Grooming Salon Ltd | Liverpool | 2023 |
| Formec Limited | Turriff | 2024 |
| Formston Tree Services Ltd | Bangor | 2026 |
| Formula Green Ltd | Brighton | 2022 |
| Formula Tree Limited | Ascot | 2025 |
| Forres Tree Services Ltd | Elgin | 2010 |
| Forrest Estate Limited | Castle Douglas | 1992 |
| Forrest Farms Ltd | Stowmarket | 2011 |
| Forrest Free Range Limited | Inchture | 2008 |
| Forrest RH Limited | Lichfield | 2022 |
| Forse Farms Ltd | Halkirk | 2010 |
| Forshaw Farms Ltd | Preston | 2025 |
| Forsie Farm Ltd | Caithness | 2003 |
| Forsyth Farms | Newton Stewart | 2002 |
| Fort Argyll Limited | Stromness | 2020 |
| Fort Farm Knockholt Ltd | Halstead | 2021 |
| Fort Town Poultry Ltd | Broughshane | 2021 |
| Fortescue Bloodstock Ltd | London | 2015 |
| Fortescue Farming Limited | Exeter | 2017 |
| Forteviot Farms Limited | By Perth | 1997 |
| Forth Crop Solutions Ltd. | Lochgelly | 2017 |
| Forth Marine Resources Ltd | North Berwick | 2018 |
| Forth Rivers Consulting Limited | Edinburgh | 2021 |
| Forth Rivers Trust | Edinburgh | 2008 |
| Forthill Animals & Carriages Ltd | Craigavon | 2017 |
| Forthshore Enterprises Limited | Eyemouth | 2003 |
| Fortis 1926 Ltd | Beverley | 2026 |
| Fortis Green Community Allotments Trust | London | 2009 |
| Fortitude Fishing Ltd | Peterhead | 2020 |
| Fortress Fungi Ltd | Mildenhall | 2024 |
| Fortrie Farms Limited | Ellon | 1995 |
| Fortuna Traders Limited | Newton Abbot | 1990 |
| Fortune Bloodstock Ltd | Culworth | 2018 |
| FORTUNE500 Ltd | Coventry | 2022 |
| Fortview Poultry Limited | Maghera | 2005 |
| Forty Falcons Limited | Swindon | 2020 |
| Forty Goals Limited | Slough | 2015 |
| Forty Hall Community Vineyard Limited | Enfield | 2010 |
| Forus Tree | Hebden Bridge | 2020 |
| Forward Developments Limited | Gillingham | 1965 |
| Forward Grazing Ltd | Stranraer | 2025 |
| Forwoods Forestry & Woodland Consultancy Ltd | Ashby De La Zouch | 2014 |
| Fosse Meadows Ltd | North Kilworth | 2023 |
| Fosseway Tree Services Ltd. | Radstock | 2013 |
| Fosshey Stud Ltd | Altrincham | 2010 |
| Fossil Farms Limited | Dorchester | 1957 |
| Foster Bloodstock Ltd | Cannock | 2024 |
| Foster Farms Limited | Beverley | 2007 |
| Foster Harrison Farms Limited | Norwich | 1955 |
| Foster-Taylor Limited | Hassocks | 2017 |
| Fostering Integrity | London | 2026 |
| Fosters Farms (Ringstead) Limited | Kettering | 1969 |
| Foston Limited | London | 2025 |
| Foston Lodge Stables Limited | Grantham | 2019 |
| Fothergill's Trees Ltd | Wakefield | 2013 |
| Foudry Farming Limited | Reading | 2009 |
| Foulden Latimer Estate Limited | Thetford | 1996 |
| Foulford Farm Ltd | Ringwood | 2017 |
| Foulger & Larter Ltd | Diss | 2021 |
| Foundation Rachel and Pamela Schiele | London | 1994 |
| Foundry Rare Breeds Limited | Salisbury | 2018 |
| Fountain Fresh Imports Limited | Wisbech | 2014 |
| Fountain Plants Limited | Altrincham | 2007 |
| Fountain Treeworks Ltd | Bristol | 2011 |
| Fountainhead Investments Ltd | London | 2014 |
| Four Acres Bray Vineyard Ltd | Maidenhead | 2026 |
| Four Acres Farming Ltd | Newent | 2022 |
| Four Acres Kennels Ltd | Bedworth | 2025 |
| Four Acres Stud Ltd | Diss | 2008 |
| Four Braes Ltd | Dunfermline | 2022 |
| Four Crosses Nursery Ltd | Llanymynech | 2003 |
| Four Daughters Vineyard Limited | Maidstone | 2025 |
| Four Derbies Limited | Wantage | 2024 |
| Four Golden Paws Ltd | Grantham | 2025 |
| Four Oaks Farm Limited | Cannock | 2016 |
| Four Oaks Horticulture Limited | Macclesfield | 2002 |
| Four Oaks Nurseries Limited | Macclesfield | 2002 |
| Four Paws Adventures Ltd | Canterbury | 2025 |
| Four Paws Cattery Ltd | Barry | 2021 |
| Four Paws Tails Ltd | Ipswich | 2018 |
| Four Ponds Farm Ltd | Rugby | 2021 |
| Four Quarters Farming Ltd | Chester | 2023 |
| Four Season Farm Limited | Borgue | 2022 |
| Four Seasons Agriculture Ltd | Newcastle Upon Tyne | 2025 |
| Four Seasons Contracting Limited | Selkirk | 2014 |
| Four Seasons Fisheries Limited | Blackpool | 2007 |
| Four Seasons Forestry Services Limited | Selkirk | 2015 |
| Four Seasons Market Garden Ltd | London | 2026 |
| Four Seasons Poultry Handlers Ltd | Ripon | 2018 |
| Four Seasons Tree Care Limited | Adderbury | 2008 |
| Four Seasons Tree Services Limited | Tiverton | 2008 |
| Four Seasons Tree Surgeons Limited | Ruislip | 2014 |