| Bramhall Hill Kennels Ltd | North Rode | 2021 |
| Bramham Christmas Trees Limited | Bradford | 2019 |
| Bramley Batty Limited | Leeds | 2011 |
| Bramley Farm Limited | Rotherham | 2015 |
| Bramley Meadows Ltd | Lincoln | 2025 |
| Brampton Valley Group Ltd | Towcester | 2012 |
| Brampton Valley Training & Assessments Ltd | Towcester | 2022 |
| Bramwell & Lloyd Limited | Essex | 1952 |
| Bramwith Hall Estates Limited | Doncaster | 2016 |
| Branch Specialist Ltd | Hornchurch | 2023 |
| Branch Walkers Tree Services Limited | Chippenham | 2002 |
| Branchard Tree & Landscapes Services Ltd | Rugby | 2026 |
| Branches Park Hatcheries Ltd | Cambridge | 2009 |
| Branching OUT (Chew Valley) Limited | Bristol | 2009 |
| Branching OUT Tree Surgery (Kent) Limited | Margate | 2008 |
| Branching OUT Tree Surgery Ltd | Aylesford | 2021 |
| Branchline Limited | Sellinge | 2016 |
| Branchtide Limited | Romsey | 2005 |
| Branchwalkers Group Ltd | Seaford | 2018 |
| Branchwalkers Tree Surgery Ltd | Uxbridge | 2015 |
| Branchwise Tree Care Ltd | Plymouth | 2024 |
| Brancote Farm Ltd | Stafford | 2021 |
| Brancote Livestock Ltd | Stafford | 2022 |
| Branded Beef Breeders (N.I.) Limited | Craigavon | 2023 |
| Brandon Hall Farm Limited | Brandon | 2003 |
| Brandon Investments Limited | Haddington | 2006 |
| Brandon Wheeler Tree Surgeries Limited | Doncaster | 2018 |
| Brandpod Limited | Royal Victoria Docks | 2015 |
| Brandreth Farm Ltd | Burscough | 2005 |
| Brandwood Moor Limited | Kendal | 2011 |
| Brandywell Boarding Ltd | Hull | 2023 |
| Branham Farming Limited | Driffield | 2011 |
| Brankholm Croft Ltd | Banchory | 2025 |
| Branksea Oysters Limited | Poole | 2016 |
| Brankston Farms Limited | Huntly | 2026 |
| Brannigan Fisheries Ltd | Peterborough | 2023 |
| Brannish Poultry Ltd | Enniskillen | 2022 |
| Bransford Garden Plants Limited | Worcester | 1961 |
| Branshogle Livery Ltd | Glasgow | 2026 |
| Bransway Agri Limited | Lymington | 2017 |
| Branthill Farms Ltd. | Wells-Next-The-Sea | 1939 |
| Branton Agri Services Limited | Beverley | 2011 |
| Branton East Side Limited | Clitheroe | 2023 |
| Branwhite Farms Limited | Sudbury | 1960 |
| Brashfield Game Ltd | Bicester | 2021 |
| Brasskat Limited | Nottingham | 2018 |
| Brassknocker Farm Limited | Bath | 2015 |
| Bratwell Equine Limited | Limavady | 2025 |
| Bratwell Hill Farm Limited | Ballyclare | 2025 |
| Brave Pawz Ltd | Hamilton | 2022 |
| Bravevalue Limited | Angus | 1992 |
| Braxium Gundogs Ltd | Fareham | 2026 |
| Bray Farming & Forestry Ltd | Derby | 2024 |
| Bray Farms Ltd | Taunton | 2019 |
| Bray Vines Ltd | Maidenhead | 2025 |
| Bray Vineyard Ltd | Maidenhead | 2025 |
| Brayards and Stanbury Space CIC | London | 2022 |
| Braybrooks Bros. Limited | Spalding | 1947 |
| Braydeston Beef Limited | Norwich | 2014 |
| Braydestone Farms Limited | Norwich | 1962 |
| Brayface Ltd | Newcastle | 2017 |
| Brayfield Farms Limited | Olney | 2011 |
| Braypark Limited | Holsworthy | 1982 |
| Brays Dairy Limited | Holsworthy | 2025 |
| Brayshaw Farm Contracting Limited | Egremont | 2023 |
| Brdt Ltd | London | 2026 |
| Breach Manor Farms Limited | Sudbury | 2003 |
| Breachley Services Limited | Bristol | 2010 |
| Breadalbane Estate Limited | Thornhill | 2012 |
| Breadalbane Sporting Ltd | Aberfeldy | 2016 |
| Breakwater Land and Energy Limited | Newton Stewart | 2007 |
| Breamore Estate Company Limited | Croydon | 1959 |
| Breck Farm Limited | Orkney | 2005 |
| Breck House Enterprises Ltd | York | 2002 |
| Breckenbrough Farm Limited | Richmond | 2018 |
| Breckland Farmers Wildlife Network Limited | Norwich | 2021 |
| Breckland Growers Limited | Norwich | 1996 |
| Breckland Organics Limited | Norfolk | 2007 |
| Breckonhurst Farm Ltd | Skelton Green | 2024 |
| Brecks Farm Limited | Leeds | 1978 |
| Brecks Vineyard Limited | Bury St Edmunds | 2025 |
| Brecon Oak Ltd | Llandovery | 2021 |
| Bredhurst Woodland Action Group | Bredhurst | 2012 |
| Bredon Hill Organics Limited | Pershore | 2013 |
| Breed Industrial Limited | Ellon | 2018 |
| Breeding Vision Limited | Banbury | 2004 |
| Breedline Ltd | Hull | 2026 |
| Breedr Limited | Tangmere | 2018 |
| Breeze Farms Ltd | Llanfyrnach | 2007 |
| Breeze Greenfield Ltd | Leicester | 2026 |
| Breeze View Farm Limited | Petersfield | 2019 |
| Brefu CYF | Ty Croes | 2021 |
| Bremner Fishing Company Limited | Wick | 1983 |
| Brendan Boyle Bloodstock Ltd | Colchester | 2014 |
| Brendarco Limited | Ormskirk | 2012 |
| Brennan Farms Ltd | Salisbury | 1994 |
| Brent Carter Limited | Lancashire | 2002 |
| Brent Farms Limited | Highbridge | 2014 |
| Brentwood Bathrooms Limited | Grays | 2026 |
| Brentwood Honey Limited | Brentwood | 2025 |