| Fassfern Mussels Limited | Fort William | 2009 |
| Fast Forward Land Services Limited | Great Hallingbury | 2009 |
| Faster Lente Llamas Ltd | Wisbech | 2016 |
| Fastforce Limited | Hessle | 2010 |
| Fastnet Fish Limited | Hull | 1987 |
| Fastnet Highlands Limited | Hull | 1986 |
| Fastnet Holdings Limited | Hull | 1980 |
| FAT FOX Mushrooms Ltd | London | 2021 |
| FAT HEN Farm Limited | Sandy | 2021 |
| FAT Lizards Limited | Thatcham | 2025 |
| Fathom Farms Ltd | Torrington | 2023 |
| Fattoria Felicita Limited | St. Ives | 2019 |
| Faughhill Farming Ltd | Kelso | 2019 |
| Fauld Farm Limited | Carlisle | 2010 |
| Faulkers Fish Farm Ltd | Burgh Le Marsh, Skegness | 2004 |
| Faulkner and Jones Bros Farms Ltd | Dunham On The Hill | 2017 |
| Fauna Track Systems Ltd | Edinburgh | 2024 |
| Faunus Forestry Ltd | Carlisle | 2024 |
| Favell Equine Ltd | Abingdon | 2026 |
| Favermead Holdings Limited | London | 1994 |
| Faversham Oyster Fishery Company | Maidstone | 2017 |
| Favis of Salcombe Limited | Torquay | 2014 |
| Favour Fishing Ltd | Elgin | 2018 |
| Fawcett Percolation Services Ltd. | Lancaster | 2015 |
| Fawkes (Kernow) Limited | Penzance | 2017 |
| Fawkes Countrystore Limited | Penzance | 2008 |
| Fawley Farms Limited | Wallingford | 2000 |
| Fawley House Stud Limited | Wantage | 2006 |
| Fawns Farm Limited | Ivybridge | 2025 |
| Faye Armour Ingleston Farm Ltd | Kirkcudbright | 2020 |
| Fays Flowers Growers Ltd | Bicester | 2023 |
| FB Farming Limited | Bishop'S Stortford | 2014 |
| FB INT Developments Ltd | Newry | 2018 |
| FB Racing Worcester Limited | Kidderminster | 2016 |
| FB Sport Horses Ltd | Solihull | 2025 |
| Fbre Consulting Ltd. | Cambridge | 2017 |
| FBT Mushrooms Limited | Craigavon | 2016 |
| FC Estates London Ltd | London | 2023 |
| FC Farms Ltd | Newry | 2013 |
| FC Racing Ltd | Ilkeston | 2026 |
| FCA Membership Limited | Lairg | 2006 |
| FCF Investments Limited | Wotton-Under-Edge | 2014 |
| FCF Potatoes Limited | Driffield | 2011 |
| FCG Agriculture Limited | Yeovil | 1997 |
| FCG Buying Limited | Bristol | 2013 |
| FCG Labour Ltd | Bristol | 2020 |
| FD Aquatics Ltd | London | 2021 |
| FD Seeds Ltd | Presteigne | 2022 |
| FDT Farms | Carlisle | 2008 |
| Fear Knot Ltd | Stornoway | 2026 |
| Fearnfield Equestrian Ltd | Brampton | 2021 |
| Feary Farms (Tilney) Limited | Kings Lynn | 1983 |
| Feather & Talon Ltd | Neath | 2024 |
| Feather and Stones Limited | Hull | 2025 |
| Feather Nest Farms Ltd | Huntingdon | 2025 |
| Feather, Fleece & FUR Limited | Preston | 2022 |
| Featherbed Fruits Ltd | Warwick | 2020 |
| Feathers and Flight Ltd | Harleston | 2026 |
| Feathers and FUR CIC | St. Columb | 2024 |
| Feathers at Altitude Limited | London | 2007 |
| Featherstone's English Flower Company Limited | Stockbridge | 2021 |
| Featherwood Limited | Spilsby | 1984 |
| Fecarry Farm Ltd | Omagh | 2019 |
| Fechan Enterprises Ltd | Lockerbie | 2018 |
| Feco Pharmaceuticals Ltd | Alston | 2024 |
| Federated Farmers Limited | Great Shelford | 1991 |
| Federation of Welsh Anglers | Tenbury Wells | 2009 |
| Fedw Equestrian Centre Ltd | Brecon | 2021 |
| FEE Sport Horses Ltd | Dungannon | 2016 |
| Feed 365 Limited | Belfast | 2016 |
| Feed the World Limited | Telford | 2015 |
| Feed, Food & Future Limited | Pershore | 2017 |
| Feedback IW Ltd | Newport | 2016 |
| Feeders R US Ltd | Leek | 2016 |
| Feedprof ENG Limited | Leeds | 2026 |
| Feedstock Supplies Ltd | Chippenham | 2017 |
| Feeling Herd Ltd | Billingshurst | 2025 |
| Feelright Pigs Ltd | Elgin | 2021 |
| Feeney Woodlands Ltd | Liverpool | 2023 |
| Feet First Farriers Ltd | Stafford | 2008 |
| Feet First Farriery Ltd | Launceston | 2023 |
| Feetham Farm Limited | Richmond | 2020 |
| FEF Grazing Limited | Chesham | 2024 |
| Feglish Farms Ltd | Trillick | 2018 |
| Feithhill Limited | Turriff | 2012 |
| Felden Park Farms Limited | St Albans | 1923 |
| Feldon Herbs Ltd | Banbury | 2004 |
| Felicia Nursery Limited | Milton Keynes | 2014 |
| Felin Farm Limited | Goodwick | 2015 |
| Felin Isaf CYF. | Maesteg | 2024 |
| Felindor Cats Ltd | Chatham | 2024 |
| Felindre Cockapoos Ltd | Lampeter | 2017 |
| Feline Fine Cat Hotel Limited | Eastleigh | 2020 |
| Felinhoneybees Limited | Cemlyn | 2016 |
| Felix Wilson Limited | Poole | 2007 |
| Fell Gate Firewood Limited | Prudhoe | 2020 |
| Fell View Farm (Cumbria) Ltd | Cockermouth | 2021 |
| Felledwood Timber Ltd | Farnham | 2012 |
| Fellows Farm Ltd | Ipswich | 2024 |
| Fellowship of the Trees C.I.C. | Glastonbury | 2020 |