| Fondo Fishing Limited | Coldharbour | 2000 |
| Fonezone Telecommunications Limited | Belfast | 2001 |
| Fong's Garden Limited | Skipton | 2020 |
| Fonthill Farming Company | Salisbury | 1971 |
| Fontridge Manor Farm Limited | Hastings | 1980 |
| Food 4 Ltd | Steyning | 2023 |
| Food and Farming Compliance Ltd | Stonehouse | 2011 |
| Food and Flower Fields Ltd | Malvern | 2025 |
| Food Convertors Limited | Malmesbury | 1999 |
| Food Enterprise Park Limited | Norwich | 2018 |
| Food Forest Cornwall Ltd | Bodmin | 2025 |
| Food From Farmers International Ltd. | Bristol | 2017 |
| Food Sovereignty Ltd | Cheltenham | 2019 |
| Food Valley Africa Ltd | Manchester | 2018 |
| Foodie Farm Holdings Limited | Fife | 2020 |
| Foodscape Limited | London | 2021 |
| Foodweb Farmers CIC | Okehampton | 2021 |
| Foodworks Holding UK Limited | Cambridge | 2018 |
| Foot Podiatry Services Ltd | Birmingham | 2025 |
| Football for Forests Ltd | Brighton | 2023 |
| Footprint Biotechnologies (UK) Ltd | London | 2020 |
| Foots Farm Limited | Stansted | 2010 |
| Foots OK Limited | Abergavenny | 2003 |
| FOOTSIE500 Ltd | Inverness | 2014 |
| Foover Systems Ltd | Aberdeen | 2018 |
| FOR Fluff Sakes Limited | Laurencekirk | 2025 |
| FOR Lora's Luck Black Animal Rescue Ltd | London | 2024 |
| FOR the Pony and the PUP Ltd | Tarporley | 2025 |
| Fora Marine UK Limited | London | 2023 |
| Forage Box Ltd | Llangamarch | 2020 |
| Forage Direct Limited | Chipping Warden | 2020 |
| Forage Mushrooms Ltd | Lostwithiel | 2025 |
| Forage Technology Limited | Loughborough | 1996 |
| Foraged by Fern Ltd. | Chesham | 2025 |
| Forager Bees Ltd | Manchester | 2023 |
| Forager Feeds Limited | Bedford | 2024 |
| Forager Investments Limited | Poole | 2021 |
| Foragevale Limited | South Yorkshire | 1997 |
| Foraging Ahead Ltd | Port Talbot | 2024 |
| Foraging Food FUN Limited | Sheffield | 2023 |
| Foragvest Limited | London | 2019 |
| Forbes Equestrian Limited | Hanworth | 2022 |
| Forbes Equine & Forge Ltd | Perth | 2026 |
| Forbes Fishing Company Ltd | By Halkirk | 2018 |
| Forbes Stock Stud Limited | Westerham | 2023 |
| Forbes Tree Care Ltd | Broxbourne | 2014 |
| Forbovi Limited | Tain | 2018 |
| Force Brewery Limited | Bury St. Edmunds | 2012 |
| Force Tree & Ground Care Ltd | Worksop | 2025 |
| Ford & Etal Farms 1994 Limited | Berwick Upon Tweed | 1994 |
| Ford Bridge Farm Ltd | Rhoscolyn | 2020 |
| Ford END Farm Ltd | Waltham Abbey | 2019 |
| Ford Farm Holdings Ltd | Chulmleigh | 2019 |
| Ford Farm Ltd | Droitwich | 2018 |
| Ford Farm Stables Limited | Brockenhurst | 2005 |
| Ford Farms (Suffolk) Limited | Eye | 2009 |
| Ford Farms Arundel Limited | Winchester | 2006 |
| Ford Farms Dorset Limited | Dorchester | 2010 |
| Ford Land Management Limited | Bristol | 2005 |
| Forde Cinta Services Limited | Brentwood | 2025 |
| Fordell Farms Limited | Haddington | 1967 |
| Forden Farriers Limited | Welshpool | 2003 |
| Fordhall Farm Limited | Market Drayton | 2004 |
| Fordham Farms Limited | Newcastle Emlyn | 2006 |
| Fordham House Limited | Ipswich | 2022 |
| Fordhouse Farms Limited | Angus | 1973 |
| Fordie Estates Limited | Edinburgh | 2004 |
| Fordleymoor Kennels Ltd | Saxmundham | 2007 |
| Fordoun Estates Limited | Perth | 1975 |
| Fords of Blythe Bridge Limited | Stoke-On-Trent | 1976 |
| Fordy Farms (Ingleby) Limited | Northallerton | 1973 |
| Foreburn Limited | Lancaster | 1963 |
| Forefields Equestrian Ltd | Whitchurch | 2022 |
| Forefront Bloodstock Ltd | Bury St Edmunds | 2023 |
| Foremaj Limited | London | 2023 |
| Foremans Fishery Ltd | Wisbech | 2023 |
| Foremark Fishery Ltd | Ilkeston | 2020 |
| Foremore Limited | Shepton Mallet | 1986 |
| Foremost Holdings Limited | St. Albans | 2017 |
| Foremost Tree Surgeons Limited | Reading | 2001 |
| Foresight Farming | Dumfries | 2022 |
| Foresight Rjukan Holding Limited | London | 2022 |
| Forest & Tree Consulting Ltd | Carluke | 2010 |
| Forest and Field Limited | | 2003 |
| Forest and Garden Timber Services Ltd | Guildford | 2026 |
| Forest and Land Ltd | Clitheroe | 2011 |
| Forest and Land Management Limited | Ottery St. Mary | 1983 |
| Forest and Tree Care Limited | Bridport | 2006 |
| Forest Asset Management Ltd | Thornhill | 2025 |
| Forest Canopy Foundation | Bicester | 2020 |
| Forest Carbon Limited | Durham | 2007 |
| Forest Comes Farming Ltd | Cardiff | 2024 |
| Forest Direct Limited | Galashiels | 2003 |
| Forest Edge (Flimwell) Limited | Wadhurst | 2020 |
| Forest Engineering Solutions (FES) Ltd | Llanwrda | 2017 |
| Forest Environment Works Limited | New Milton | 2025 |
| Forest Environmental Ltd | New Milton | 2026 |
| Forest Excavations Limited | Newton Stewart | 1996 |
| Forest Farm Countryside Management Ltd | Melksham | 2019 |
| Forest Farm Peace Garden | Ilford | 2006 |