| Bropercess Ltd | London | 2025 |
| Brophy Castings Limited | Bradford | 2003 |
| Bror Coffee Ltd | Hove | 2023 |
| Bros Distilling Ltd | Stoke Ontrent | 2018 |
| Bros Five Limited | Leicestershire | 2001 |
| Brose Engineering Ltd | London | 2019 |
| Brose Limited | Coventry | 1965 |
| Broseley Technical Services Limited | Broseley | 2009 |
| Brosht Golden Company Ltd | London | 2026 |
| Bross Print & Design Ltd | Tunbridge Wells | 2010 |
| Brosterfield Engineering Services Limited | Matlock | 2000 |
| Brot & Co Ltd | Glasgow | 2024 |
| Brotech Systems Ltd | Newark | 2013 |
| Brothblocs Ltd | London | 2026 |
| Brother & Brother Ltd | Isleworth | 2020 |
| Brother Bear Ltd | Gloucester | 2026 |
| Brother Butchery Ltd | Great Yarmouth | 2024 |
| Brother Engineering Ltd | Swansea | 2009 |
| Brother Industries (U.K.) Ltd. | Wrexham | 1985 |
| Brother Joe's Kitchen Ltd | London | 2025 |
| Brother Wood Company Limited | London | 2014 |
| Brothers B Joinery Ltd | Feltham | 2022 |
| Brothers Carpentry & Joinery Ltd | Southampton | 2023 |
| Brothers Carpentry Ltd | Ashford | 2022 |
| Brothers Coffee Co. Ltd | Burnley | 2026 |
| Brothers Drinks Co. Limited | Shepton Mallet | 1992 |
| Brothers Grup Limited | Dartford | 2021 |
| Brothers Installations Limited | Rickmansworth | 2010 |
| Brothers Joinery Limited | London | 2018 |
| Brothers Lifts Ltd | Biggleswade | 2008 |
| Brothers Machine Tools Limited | Preston | 2020 |
| Brothers Pyrotechnics (UK) Limited | Doncaster | 2006 |
| Brothers Road Haulage Ltd | Derby | 2022 |
| Brothers Staircase Ltd | Hayes | 2023 |
| Brothers' Bakehouse Limited | Alton | 2019 |
| Brothers-Emr Limited | Cheltenham | 2014 |
| Brotherton Diving Limited | Irvine | 2024 |
| Brotherton Esseco Limited | Wakefield | 2011 |
| Brotherton Park Ltd | Knottingley | 2022 |
| Brotherwood Automobility Limited | Sherborne | 1978 |
| Brough Aerospace Technologies Ltd | Wigan | 2025 |
| Brough AG Ltd | Maryport | 2020 |
| Brough Motorcycles UK Ltd | Gunnislake | 2024 |
| Brough Superior GB Limited | London | 2017 |
| Brough Technical Solutions Ltd | Brough | 2025 |
| Broughgammon Limited | Ballycastle | 2016 |
| Broughton Ales Limited | Biggar | 1995 |
| Broughton Brewing Group Ltd | Dundee | 2024 |
| Broughton Electro-Air Products Limited | Redditch | 2000 |
| Broughton Foods Limited | Morecambe | 2024 |
| Broughton Hall Dairy Limited | Stowmarket | 2022 |
| Broughton House Upholstery Limited | Leicester | 2003 |
| Broughton Joinery Limited | Stourbridge | 2019 |
| Broughton Powell Furniture Limited | Lincoln | 1995 |
| Broughton Work Solutions Ltd | Dartford | 2026 |
| Broughton-Stuart Jewellery Limited | Perthshire | 2003 |
| Broughty Electrical Ltd | Dundee | 2017 |
| Broughty Ferry Rope Access Solutions Ltd | Dundee | 2018 |
| Brouns & Co Glass Ltd | Leeds | 2011 |
| Brouns & Co Limited | Leeds | 2011 |
| Brow Holdings Limited | | 2001 |
| Browhill Limited | Axminster | 2021 |
| Brown & Blond Ltd. | York | 2005 |
| Brown & Burk UK Limited | Hounslow | 2000 |
| Brown & Carroll (London) Limited | Basildon | 1994 |
| Brown & Forrest Bistro Limited | Somerset | 2011 |
| Brown & Hawthorne Engineering Limited | Coventry | 2017 |
| Brown & Holmes (Derby) Limited | Birmingham | 2024 |
| Brown & Holmes (Tamworth) Limited | Birmingham | 2002 |
| Brown & Holmes Automation Limited | Birmingham | 2025 |
| Brown & Meadows Limited | Stockport | 2019 |
| Brown & Miller Racing Solutions Limited | Slough | 1999 |
| Brown & Newirth Limited | Coventry | 2011 |
| Brown & Sons (Bramley) Limited | Leeds | 1953 |
| Brown and Forrest Limited | Somerset | 2006 |
| Brown and Holmes Limited | Tamworth | 2009 |
| Brown Bagpipes Ltd | Dunblane | 2026 |
| Brown Bear CNC Design Ltd | Nuneaton | 2020 |
| Brown Bear Design Limited | Nuneaton | 2021 |
| Brown Bird and Company Limited | Thirsk | 2021 |
| Brown Boveri Electric Co., Ltd | London | 2025 |
| Brown Boys Worldwide Limited | Southall | 2024 |
| Brown Bread (UK) Ltd | Wirral | 2004 |
| Brown Britain Ltd | London | 2022 |
| Brown Bros. (Irvine) Limited | | 1975 |
| Brown Brothers Group Limited | Exmouth | 1983 |
| Brown Brothers Property Development Ltd | Eastbourne | 2020 |
| Brown Butter Bakery Ltd | Gloucester | 2025 |
| Brown COW Organics Limited | Somerset | 2005 |
| Brown Dog Aviation Limited | Weymouth | 2020 |
| Brown Electrical Electronics Technology Limited | Porth | 2024 |
| Brown END White Limited | Ipswich | 2025 |
| Brown Europe Limited | Chatham | 1990 |
| Brown in Town Limited | Bristol | 2013 |
| Brown Jewellery Limited | Cradley Heath | 2025 |
| Brown Knight & Truscott Holdings Limited | London | 1989 |
| Brown Knight & Truscott Limited | Newcastle Upon Tyne | 1992 |
| Brown Mcfarlane Limited | Eurocentral | 1989 |
| Brown Mcfarlane Precision Engineering Limited | Motherwell | 2020 |
| Brown Pear Interiors Limited | York | 2022 |