| Bauer Dressage Ltd | Eastbourne | 2010 |
| Baum Tree Company Limited | Llandysul | 2020 |
| Baumber Park Farms Limited | Lincolnshire | 2007 |
| Bavanmore Farm Limited | Newry | 2012 |
| Bavent Limited | Suffolk | 2008 |
| Bawburgh Lakes Ltd | Colchester | 2012 |
| Bawdeswell Farms Limited | Norfolk | 1952 |
| Bawtry Farms Limited | Bawtry | 1997 |
| Bawtry Hall Venue Woodland Ltd | Doncaster | 2021 |
| Bawtry Hall Woodland Ltd | Doncaster | 2021 |
| BAX Engineering (Scotland) Ltd | Macduff | 2019 |
| Baxter Farming Ltd | Nottingham | 2010 |
| Baxter Farms Limited | Birchington | 1990 |
| Baxterley Equestrian Rehabilitation and Training Ltd | Baxterley | 2025 |
| Baxters High Brow Produce Ltd | Merseyside | 2003 |
| Baxters Supplies Limited | Wigan | 2015 |
| Baxton Grange Farms Limited | Helmsley | 1993 |
| Bay Horse Farm Limited | Knottingley | 2010 |
| Bay Pond Shaw Ltd | Cranbrook | 2025 |
| Bay Tree Garden Group Limited | Billericay | 2020 |
| Bay Tree Services (SW) Limited | Exeter | 2009 |
| Bay Water Fishing Limited | Ross-Shire | 2003 |
| Bayburn Limited | | 2006 |
| Baybutt & Sons Limited | Ormskirk | 1982 |
| Baybutt Farms Limited | Ormskirk | 2017 |
| Baybutt Holdings Limited | Preston | 2011 |
| Baycliffe Limited | Tunbridge Wells | 1995 |
| Bayes Tree Services Ltd | Malton | 2023 |
| Bayfield Farms Limited | Norwich | 2002 |
| Bayford Estate Management Ltd | Great Hallingbury | 2026 |
| Bayhill Holding Company Ltd | Hawick | 2018 |
| Bayiravi Ltd | Chesterfield | 2020 |
| Bayley's of Rosliston Limited | Ashbourne | 2005 |
| Baylham House Farm Ltd | Baylham | 2021 |
| Baylis Farming Limited | Worcester | 2019 |
| Baylis Farms Limited | London | 2005 |
| Baylys Baits Limited | Clacton-On-Sea | 2020 |
| Bayne Farming Limited | Perth | 2018 |
| Baynes Nutrition Limited | Northwich | 2010 |
| Bays Leap Dairy Farm Limited | Hindhead | 1999 |
| Bayvest Limited | Cheltenham | 2006 |
| Bayview Fishing Ltd | Banff | 2014 |
| BB & O Agricultural Services Limited | Wallingford | 2024 |
| BB Bloodstock Limited | Royston | 2020 |
| BB Logs and Tree Clearance Ltd | London | 2025 |
| BB Renewable Energy Ltd | Macclesfield | 2022 |
| BB Supervision Ltd | Ripley | 2025 |
| BBA Atlantis Ltd | London | 2019 |
| BBB Fishing Limited | Newton Abbot | 2022 |
| BBD Fishing Ltd | Banff | 2019 |
| Bbiq Limited | London | 2025 |
| BBP Racing Ltd | Llanymynech | 2019 |
| BBP Rose Ltd | Fraserburgh | 2019 |
| BBR Bloodstock Ltd | Ross-On-Wye | 2021 |
| Bbwventures Ltd | Twickenham | 2020 |
| BC (Scotland) Limited | Forfar | 1998 |
| BC Trading Supplies Limited | Middletown | 2020 |
| Bc&V Nicholson Ltd | Annan | 2018 |
| BCA Groundworks Ltd | Southampton | 2024 |
| BCD Grass Converters Limited | Anglesey | 2019 |
| BCF Trading Ltd | Canterbury | 2022 |
| BCH Savage Agri Ltd | Sheffield | 2026 |
| BCH Stamford Ltd | Grantham | 2023 |
| BCK Flat Roofing Ltd | Ayr | 2018 |
| Bcroft Farms Limited | Crewe | 2025 |
| Bcsk Limited | Killingworth Village | 2024 |
| BD Contracts Ltd | Omagh | 2015 |
| BD Corporate Limited | Liverpool | 2018 |
| BD Equine Ltd | Huddersfield | 2018 |
| BD Thoroughbreds Ltd | Abingdon | 2026 |
| Bdah for Animal Health and Agriculture Ltd | London | 2021 |
| BDK Plant Hire Limited | Bishop Auckland | 2013 |
| BE Green Tree Surgery Ltd | Colchester | 2006 |
| BE Holden Farming Limited | Sedbergh | 2026 |
| BE Oaks Ltd | North Hykeham | 2025 |
| BE Ready Fishing Company Ltd | Lerwick | 2019 |
| BE Ready Offshore Ltd | Burra | 2018 |
| BE the Lotus Flower Ltd | Croydon | 2023 |
| Beach's Kennels Limited | Bedmond | 1977 |
| Beachampton Agri Solutions Ltd | Milton Keynes | 2022 |
| Beachspring Limited | Dorchester | 1997 |
| Beacom Farm Livestock & Agricultural Services Ltd | Stockport | 2026 |
| Beacom Farms Limited | Annan | 1993 |
| Beacon Business Consultancy Limited | London | 2014 |
| Beacon END Holdings Limited | Colchester | 2013 |
| Beacon Farm Forestry Limited | Kingswinford | 2021 |
| Beacon Hill Group Ltd | Great Abington | 2020 |
| Beacon Hill Land Limited | Salisbury | 2010 |
| Beacon Hill Nature Reserve | High Wycombe | 2011 |
| Beacon Park Farm Ltd | Walsall | 2018 |
| Beacon View Equestrian Ltd | Wigan | 2021 |
| Beaconfield Farm Limited | East Yorkshire | 2002 |
| Beacons Bees | Merthyr Tydfil | 2012 |
| Beacons Tree Services Ltd | Brecon | 2022 |
| Beacroft (Farms) Limited | Wallingford | 1963 |
| Beadle Livestock Limited | East Yorkshire | 2001 |
| Beal Farm Limited | Berwick-Upon-Tweed | 2012 |
| Beaney Fisheries Ltd | Basildon | 2023 |
| Beanit Farm Livery Limited | Coventry | 2023 |
| Beans and Blooms Ltd | Grays | 2019 |