| B.J. Bebb & Sons Limited | Bridgnorth | 1977 |
| B.J. Beevor Limited | Norwich | 2002 |
| B.J. Covell & Sons Limited | Lincolnshire | 1975 |
| B.J. Dale and Company Ltd | Rugeley | 2019 |
| B.J. Wills Limited | Downpatrick | 2012 |
| B.J.C. Woodall Limited | Chessington | 1964 |
| B.J.Flower & SON Limited | Mayfield | 1963 |
| B.L. Farms Limited | 139 Fountainbridge | 1986 |
| B.L.Mitcham & SON Limited | Bury St. Edmunds | 1953 |
| B.M. & D.V. Rutterford Limited | Dunmow | 1958 |
| B.M.C Fish Handlers Ltd | Scalloway | 2016 |
| B.N. Sloan & Company Limited | Perthshire | 1984 |
| B.P.Herbs Ltd | Royston | 2025 |
| B.R. & N.D. Challenor Limited | Shrewsbury | 2005 |
| B.S. Povey (Winterbourne) Limited | Hungerford | 1959 |
| B.S.P. Timber Limited | Aberdeen | 2005 |
| B.V & SON Limited | Ledbury | 2019 |
| B.W. Smith (Pledgdon Farms) Limited | Essex | 1960 |
| B.Willis Agriculture Services Ltd | Houghton Le Spring | 2022 |
| B2D Trawlers Limited | Torquay | 2020 |
| B3 Environmental Limited | Fife | 2005 |
| Baa-Rilliant Sheep Co. Limited | Skipton | 2024 |
| Baadsmill Each Beinne Limited | West Calder | 2025 |
| Baba JEE Limited | Solihull | 1998 |
| Baba Wren Ltd | Henfield | 2022 |
| Babbington Hall Limited | Southampton | 2003 |
| Babbros Limited | Nr Andoversford | 2021 |
| Babthorpe Hall Farm Limited | Selby | 2003 |
| Baby Potato Limited | Nottingham | 2023 |
| Babylon Eco Centre Ltd | Uckfield | 2023 |
| Babylon Fish Farm Limited | Hawkenbury | 2025 |
| Babylon Plants Ltd | Watlington | 2014 |
| BAC Farming | Dumfries | 2006 |
| Bacchus Enterprises Limited | Peterhead | 2008 |
| Bach Dingle CYF | Presteigne | 2014 |
| Bachellaeth CYF | Pwllheli | 2026 |
| Back Street Garden CIC | Frome | 2026 |
| Back to Earth Limited | Donaghadee | 2024 |
| Backakelday Farm Limited | Holm | 2026 |
| Backboath Farms Limited | Forfar | 1996 |
| Backfell Farm Limited | Castle Douglas | 2002 |
| Backford Brook Farm Ltd | Neston | 2018 |
| Backgarden Bantams Ltd | Birmingham | 2025 |
| Backhill Farming Limited | Forfar | 2018 |
| Backhouse Partners Limited | Uttoxeter | 2002 |
| Backmuir Trading Limited | Banffshire | 2001 |
| Backwell Wood Estate Limited | Bristol | 2018 |
| Backyard Alpacas Ltd | Dereham | 2024 |
| Bacol | Lockerbie | 2025 |
| Bacons Enterprise Ltd | Diss | 2025 |
| Bacres Farm Limited | Hambleden | 2020 |
| Bacton Pigs Limited | Stowmarket | 1976 |
| BAD Seas Limited | Deal | 2020 |
| Badass Mate Ltd | London | 2021 |
| Badbury Hill Farm Limited | High Wycombe | 2013 |
| Baddeley Farms Limited | Diss | 1962 |
| Baddiley Farms Limited | Worksop | 1966 |
| Baddiley Hulse Limited | Shawbury | 2014 |
| Baden Hall Enterprises Ltd | Staffordshire | 1984 |
| Badenoch Land Management Limited | Kingussie | 1976 |
| Badgebarn Limited | Newton Abbot | 1981 |
| Badger Face Texel Society Limited | Carlisle | 2018 |
| Badger Farms Limited | Shifnal | 1963 |
| Badger's Halt Ltd | Cardiff | 2025 |
| Badgers Food Forest CIC | St. Ives | 2023 |
| Badgers Hill Farm Limited | Meopham | 2013 |
| Badumi Limited | Bromley | 2025 |
| BAG END Farm Ltd | Royston | 2022 |
| Bagber Ltd | Taunton | 2019 |
| Bagborough Farms Limited | Wells | 1956 |
| Baggrave Farms Limited | Leicester | 1990 |
| Baggy's Ltd | Torquay | 2004 |
| Bagmere Farm Limited | Sandbach | 2025 |
| Bagmore Limited | Taunton | 2019 |
| Bagnell Farm Meats Ltd | Norton-Sub-Hamdon | 2018 |
| Bagnett Wood Logs Ltd | Stourbridge | 2022 |
| Bagnum Equestrian Centre Ltd | Ringwood | 2015 |
| Bagold Limited | Belfast | 2009 |
| BAH Humbug Trading Ltd | Bourne | 2019 |
| Baidens ARK Ltd | Thornton Heath | 2021 |
| Bailees Field Ltd | Haslemere | 2021 |
| Bailey Bros. (Southern) Limited | Waterlooville | 1994 |
| Bailey Farming Limited | Gateshead | 2018 |
| Bailey Farms Limited | Tarporley | 1997 |
| Bailey Fishing Ltd | Buckie | 2018 |
| Bailey Grange Services Limited | Bideford | 2023 |
| Bailey Livestock Limited | Ripon | 2022 |
| Bailey Nurseries Ltd | London | 2024 |
| Baileyhil 2 Limited | Enniskillen | 2018 |
| Baileys Bales Ltd | Daventry | 2024 |
| Baillie Farms Ltd | Wigan | 2023 |
| Bailors Limited | Thame | 2025 |
| Bailside Farm Ltd | Airdrie | 2026 |
| Bain and Morton Limited | Gillingham | 2026 |
| Bain Fishing Limited | Westray | 2024 |
| Bain Produce Limited | Horncastle | 2005 |
| Bainbridge Farming Ltd | Richmond | 2025 |
| Baines Estates Limited | Grantham | 2015 |
| Bainne BÓ Limited | Dumfries | 2025 |
| Bainton Arable Farming Limited | Driffield | 2002 |