| Brownies Beef Limited | Rugeley | 2021 |
| Browning Forestry Ltd | Wareham | 2012 |
| Brownlee Livestock Ltd | Loughgall | 2016 |
| Brownrigg Hall Limited | Cumbria | 2006 |
| Browns Estates Limited | Aberdeen | 2011 |
| Browns Plantations Kenya Limited | Aberdeen | 1925 |
| Browns Tree Services Limited | Skipton | 2006 |
| Browns Tree Solutions Limited | Milton Keynes | 2019 |
| Brownsport Limited | Nuneaton | 2004 |
| Browse Bros Fisheries Limited | Torquay | 2008 |
| Bruce Coull Fishing Ltd | Peterhead | 2018 |
| Bruce Countryside Developments Ltd. | Perth | 1997 |
| Bruce Farms Limited | Ellon | 1996 |
| Bruce Mackenzie Limited | Lochinver | 1995 |
| Bruce Pearse Farms Ltd | London | 2025 |
| Bruce S Buchan Ltd. | Fraserburgh | 2003 |
| Bruce Seaman Farms Limited | Bungay | 1981 |
| Bruce Todd Ltd | Halkirk | 2016 |
| Bruce-Lockhart Farming Limited | Faversham | 2011 |
| Brucemount Farming Limited | Dunfermline | 2018 |
| Brucest Ltd | Brierley Hill | 2024 |
| Brue Farms Limited | Yeovil | 2014 |
| Bruern Enterprises Limited | Chipping Norton | 1979 |
| Bruern Holdings Ltd | Chipping Norton | 2024 |
| Brunel Estates Limited | Croydon | 2002 |
| Bruno Wehrle Agriculture Limited | Lechlade | 2003 |
| Brunswick Organic Nurseries Limited | York | 1991 |
| Brunton Farms Limited | By Arbroath | 2012 |
| Bruntonna Limited | London | 2020 |
| Bruxie Farms Limited | Turriff | 2010 |
| Bryan Massie Woodland Management Limited | Montrose | 2005 |
| Bryan Morris (Contracting) Limited | Lydney | 2014 |
| Bryan Read Limited | Marlborough | 1990 |
| Bryan's Salads Ltd. | Preston | 2000 |
| Bryants Nurseries Limited | Hemel Hempstead | 1959 |
| Bryantscroft Puppies Limited | Horncastle | 2021 |
| Bryantuk Ltd | Hindhead | 2023 |
| Bryce Lovell Ltd | Tavistock | 2025 |
| Bryces Farms Limited | Romsey | 1965 |
| Bryden Farming Limited | Tiptree | 2025 |
| Bryer Estates Limited | Warwick | 2017 |
| Bryger Farms Limited | Somerset | 2007 |
| Bryggen Business Services Ltd. | Fraserburgh | 2012 |
| Bryn Bedd Limited | Preston | 2018 |
| Bryn Farm Limited | Ashbourne | 2013 |
| Bryn Gaseg Theraputic Horsemanship Centre Ltd | Dulas | 2020 |
| Bryn Helyg Limited | Pwllheli | 2020 |
| Bryn Talog Limited | Mold | 2020 |
| Bryn Tirion Farm Limited | Brynteg | 2014 |
| Bryn Y Celyn Farm Ltd | Montgomery | 2025 |
| Bryn Y CIL Estate Ltd | Newtown | 2026 |
| Bryn's Kitchen Limited | St Asaph | 2015 |
| Brynam Holdings Limited | Newtown | 2015 |
| Bryndu Free Range Eggs Limited | Powys | 2005 |
| Brynglas Farming Ltd | Tregaron | 2019 |
| Bryngwyn Limited | Carlisle | 2018 |
| Brynhogfaen CYF | Llanybydder | 2021 |
| Brynkinalt Farming Limited | Wrexham | 2013 |
| Brynllan Ltd | Swansea | 2002 |
| Brynteg Glamping Limited | Brynteg | 2016 |
| Bryony Properties Limited | Buckie | 2006 |
| Bryonyhill Cattery Services Ltd | Swindon | 2024 |
| BS Agricultural Contracting Limited | Enniskillen | 2015 |
| BS Bloodstock Limited | Newry | 2015 |
| BS Craft Ltd | Wolverhampton | 2026 |
| BS Forestry Ltd | Elgin | 2023 |
| BSA Marine Ltd | Shetland | 2016 |
| BSH Racing Limited | Middlesbrough | 2014 |
| Bsixtwelve Limited | Winchester | 2017 |
| BSN Agri Services Ltd | Hull | 2019 |
| Bsoil Ltd | Peterborough | 2024 |
| BSW Timber Suppliers South Limited | Hartfield | 2025 |
| BT Equine Ltd | Wokingham | 2023 |
| BT17 Limited | Belfast | 2016 |
| BTB Equine Ltd | Aberdeen | 2026 |
| BTC British Tobacco Corporation Ltd | London | 2018 |
| BTS Group Limited | Helsby | 2001 |
| BTY Agriculture Limited | Deal | 2016 |
| Buadh Ltd | London | 2016 |
| Bubba Shrimp Limited | King'S Lynn | 2013 |
| Bubble and Squeak Dog Spa Limited | Kendal | 2024 |
| Bubbles Daycare (Lincoln) Limited | Lincoln | 2013 |
| Bubbleton Farm Produce Ltd | Tenby | 2015 |
| Bubney Farms Ltd | Shropshire | 2003 |
| Bubotu Machina Ltd | Doncaster | 2021 |
| Bubusky Cattery Ltd | Gretna | 2025 |
| Buccleuch Woodlands (South) Limited | Kettering | 2015 |
| Buccleuch Woodlands Enterprises Limited | Selkirk | 2005 |
| Buccleuch Woodlands Limited | Selkirk | 1982 |
| Buchan (E104) Limited | Aberdeen | 2007 |
| Buchan (PD657) Limited | Aberdeen | 2005 |
| Buchan (PW457) Limited | Aberdeen | 1998 |
| Buchan (WN1) Limited | Aberdeen | 1998 |
| Buchan Farmers & Growers Limited | Fraserburgh | 1993 |
| Buchan Fishing Ltd | Fraserburgh | 2023 |
| Buchan Milne Ltd | Fraserburgh | 2016 |
| Buchan Woodlands Limited | Peterhead | 1989 |
| Buchan-Bruce Limited | Peterhead | 2025 |
| Buchanan Farms Ltd | Sandwich | 2021 |
| Buchanans of Cavandarragh Ltd | Omagh | 2016 |