| Brownlane Limited | Salford | 2001 |
| Brownlow 64 Limited | South Shields | 2014 |
| Brownlow Veterinary Group Limited | Bristol | 2012 |
| Brownpower Engineering Limited | Rugby | 2018 |
| Brownroyd Motors Heywood Limited | Leeds | 2013 |
| Browns (Holdings) Ltd | Newmarket | 2007 |
| Browns Barbers Liskeard Ltd | Liskeard | 2016 |
| Browns Body Services Limited | Edinburgh | 2010 |
| Browns Chilled Distribution Limited | Newmarket | 1994 |
| Browns Growth Capital Ltd | London | 2023 |
| Browns of Burwell Ltd. | Nantwich | 1965 |
| Browns Photography Limited | Morpeth | 2003 |
| Browns Restaurant (Brighton) Limited | West Midlands | 1981 |
| Browns Restaurant (Bristol) Limited | West Midlands | 1989 |
| Browns Restaurant (Cambridge) Limited | West Midlands | 1975 |
| Browns Restaurant (London) Limited | West Midlands | 1934 |
| Browns Restaurant (Oxford) Limited | West Midlands | 1983 |
| Browns Restaurants Limited | West Midlands | 1971 |
| Brownsource Consulting Ltd | London | 2021 |
| Brownstone Builders Ltd | Nottingham | 2011 |
| Brownsword Group Holdings Limited | Bradford | 1989 |
| Brownsword Productions Limited | Bradford | 1990 |
| Brownwilks Assets (2) Limited | Salford | 2009 |
| Brownwilks Assets Limited | Salford | 2009 |
| Browpack Limited | | 2006 |
| Browrich Limited | Berkshire | 1984 |
| Brox Limited | Glasgow | 2024 |
| Broxap and Corby Limited | Newcastle Under Lyme, | 1992 |
| Broxap Design & Build Limited | Newcastle | 2009 |
| Broxap RT Protector Limited | Newcastle Under Lyme | 2011 |
| Broxiibeauty Invest Limited | London | 2022 |
| Broxiibeauty Limited | London | 2022 |
| Broxton Park Limited | Nantwich | 2015 |
| Brra Management Limited | London | 2025 |
| BRS Holdings Limited | Romsey | 2000 |
| Brsl Subsidiary Limited | London | 2024 |
| BRU Limited | London | 2025 |
| Bruach Enterprise Limited | Ayr | 2000 |
| Bruce Chapman Limited | Caterham | 2024 |
| Bruce Events Ltd | East Kilbride | 2019 |
| Bruce Fletcher (Leicester) Limited | York | 1960 |
| Bruce Mclaren Motor Racing Limited | Poole | 1975 |
| Bruce Technology Co., Limited | London | 2017 |
| Brucenetworks Ltd | London | 2015 |
| Bruckhof Ltd | London | 2021 |
| Bruges Renewables Limited | Dunkeld | 2011 |
| Bruhll Engineering Ltd | London | 2017 |
| Brukarz Management Ltd | Edinburgh | 2010 |
| Brulimar Manufacturing Limited | Middleton | 2016 |
| Brulines Group Limited | Stockton On Tees | 2011 |
| Brulines Limited | Stockton On Tees | 2001 |
| Brum Pack Ltd | Birmingham | 2015 |
| Brumble Limited | Bedford | 2025 |
| Brumbrums Limited | Altrincham | 2001 |
| Brumgyaliegyaldem Ltd | London | 2023 |
| Brunapple Limited | Manchester | 1997 |
| Brundonshaw UK Limited | London | 2020 |
| Brunel Entrepreneurs Limited | Northampton | 2004 |
| Brunel Healthcare Limited | Swadlincote | 2003 |
| Brunel Property Limited | Bristol | 2022 |
| Brunels Limited | Southsea | 2006 |
| Brungot Verksted Invest Limited | London | 2022 |
| Brungot Verksted Limited | London | 2022 |
| Brunhill Limited | Chorley | 2010 |
| Bruno Diamond Limited | Harrogate | 2021 |
| Brunsdon Financial Services Holdings Limited | Nottingham | 2016 |
| Brunsleigh Croft Management Company Limited | Loughborough | 2012 |
| Brunswick Dental Ltd. | Belfast | 2023 |
| Brunswick Estate Company Ltd | Salford | 2004 |
| Brunswick House (Hove) RTM Company Limited | Hove | 2025 |
| Brunswick Parade Management Company Limited | Liverpool | 1989 |
| Brunswick Properties (Halifax) Limited | Bradford | 1970 |
| Brunswick Property Developments Ltd | Stourbridge | 2024 |
| Brunswicks Law Limited | Liverpool | 2014 |
| Bruntwood ID Manchester Limited | Manchester | 2021 |
| Bruntwood Pall Mall Limited | Manchester | 2021 |
| Brush UP Domestic Services Ltd | Tonbridge | 2014 |
| Brushes Clough Reservoir Ltd | Altrincham | 2014 |
| Brushhire Ltd | Oldbury | 2017 |
| Brute Force Records Limited | Manchester | 2009 |
| Bruud Ltd | London | 2010 |
| Bruun & Co Limited | London | 2005 |
| BRV Volume Limited | Oxford | 2007 |
| BRY Group Limited | London | 2014 |
| Bryad Developments Limited | High Wycombe | 1975 |
| Bryan Pedersen Limited | Cleethorpes | 2013 |
| Bryan Redhead & Co. Limited | Broughton-In-Furness | 2012 |
| Bryan Rudolph Barnes Ltd | London | 2020 |
| Bryansburn Management Ltd | Bangor | 2004 |
| Bryant Carpentry Limited | Fareham | 2023 |
| Bryant Country Homes Limited | High Wycombe | 1992 |
| Bryant Group Services Limited | High Wycombe | 1976 |
| Bryant Homes Central Limited | High Wycombe | 1954 |
| Bryant Homes East Midlands Limited | High Wycombe | 1959 |
| Bryant Homes Limited | High Wycombe | 1987 |
| Bryant Homes North East Limited | High Wycombe | 1993 |
| Bryant Homes Northern Limited | High Wycombe | 1990 |
| Bryant Homes Scotland Limited | Abbotsinch | 1994 |
| Bryant Homes South West Limited | High Wycombe | 1954 |
| Bryant Homes Southern Limited | High Wycombe | 1938 |