| Brown Midco Limited | Luton | 2020 |
| Brown Pike Property Ltd | Taunton | 2026 |
| Brown Rice Farms Limited | Carlisle | 2024 |
| Brown Shipley & Co. Limited | London | 1945 |
| Brown Shipley Holdings Limited | London | 1960 |
| Brown Topco Limited | Luton | 2020 |
| Brown Wulff Ltd | Higham Ferrers | 2020 |
| Brownbridge Holdings Limited | Bury | 2005 |
| Browne & Brown IFA Ltd | Pontyclun | 2021 |
| Browne & Browne IFA Limited | Pontyclun | 2008 |
| Browne Brothers Metal Group Holdings Limited | Lincoln | 2026 |
| Browne Investments Limited | Moreton-In-Marsh | 2024 |
| Brownes Hearing Solutions Holdings Ltd | Peterlee | 2024 |
| Brownfield Technologies Limited | London | 2013 |
| Brownhill Capital Ltd | London | 2018 |
| Brownhill Insurance Group Limited | Bromley | 1980 |
| Brownhill Underwriting Limited | London | 1998 |
| Brownill Vickers (Holdings) Limited | Sheffield | 2025 |
| Browning Developments NO.10 Limited | Leeds | 2016 |
| Browning Financial Limited | Telscombe Cliffs | 2005 |
| Browning Group Limited | Bournemouth | 2021 |
| Browning PFI 2003 Limited | Leeds | 2003 |
| Browning PFI Holdings 2014 Limited | Leeds | 2014 |
| Browning PFI Holdings Limited | Leeds | 2002 |
| Browning Rose Financial Limited | Maidstone | 2015 |
| Browning Rose Wealth Management Ltd | Maidstone | 2025 |
| Browning's Investments Limited | London | 2025 |
| Brownings the Bakers (Holdings) Ltd | Kilmarnock | 2017 |
| Brownlands Holdings Limited | Daventry | 2024 |
| Brownley Consulting Ltd | London | 2025 |
| Brownlow Wealth Management Ltd | Ware | 1977 |
| Brownrigg Properties Limited | Carlisle | 2011 |
| Browns CM Holdings Limited | Wigan | 2026 |
| Browns Furniture Holdings Limited | Glasgow | 2021 |
| Browns Print Holdings Limited | Manchester | 2025 |
| Browns Properties & Developments Ltd | Hornchurch | 2025 |
| Browns Property Holdings Limited | Fareham | 2019 |
| Browns Stocks and Shares Ltd | Watford | 2025 |
| Brownscombe Family Capital Limited | London | 2020 |
| Brownsea Island Holdings Limited | Poole | 1967 |
| Brownshore Investments Limited | Walsall | 2017 |
| Brownside Holdings Ltd | Burnley | 2023 |
| Brownsters Financial Limited | Chichester | 2015 |
| Brownstone Ventures Ltd | Harrow | 2024 |
| Brownstown Consultancy Ltd | Cardiff | 2019 |
| Brownsview Ltd | London | 2015 |
| Brownway Property Limited | London | 2020 |
| Browseman Limited | Warwick | 2024 |
| Browston Hall Holdings Ltd | Lowestoft | 2017 |
| Browzer Holdings Limited | Leeds | 2018 |
| Broxden IT Support Limited | Perth | 2024 |
| Broxley Limited | Cardiff | 2024 |
| Broxton Brands Limited | Burnley | 2026 |
| Broxton Enterprises Limited | Burnley | 2026 |
| Broxton Group Limited | Burnley | 2026 |
| Broyd Investments Ltd | Woking | 2020 |
| Brp&Jm Holdings Ltd | Harrogate | 2026 |
| BRP1 Ltd | Lancing | 2025 |
| BRS (Southwest) Limited | Solihull | 2025 |
| BRS Capital Holdings Limited | Harrow | 2026 |
| BRS Capital Ltd | London | 2025 |
| BRS Corporate Services Group Ltd | Glasgow | 2013 |
| BRS Futures Limited | London | 2002 |
| BRS Trading Limited | Rickmansworth | 2016 |
| Brsh Holdings Ltd | Bromyard | 2023 |
| Brss Holdings Limited | Bristol | 2026 |
| BRT 123 Limited | Belfast | 2014 |
| Brtc Holdings Ltd | Leicester | 2023 |
| Bruar Real Estate Group Limited | Norwich | 2021 |
| Brubeck Limited | Cirencester | 2004 |
| Brucan Holdings Ltd | Canary Wharf | 2021 |
| Bruce & Greig Limited | Lanarkshire | 1997 |
| Bruce Burke & Company Limited | London | 1980 |
| Bruce Family Holdings Ltd | Sheffield | 2025 |
| Bruce Family Investments | Leeds | 2020 |
| Bruce Holdco Limited | London | 2025 |
| Bruce Stevenson Limited | | 1981 |
| Bruce Sutherland Inc. | Moreton-In-Marsh | 1978 |
| Bruce-Clifton Property Holdings Ltd | London | 2025 |
| Bruce-Smith Investments Limited | London | 2017 |
| Brucegate Holdings Ltd | Gateshead | 2024 |
| Bruces Pack Holdings Ltd | Crediton | 2025 |
| Bruckenwasser Ltd | Runcorn | 2021 |
| Bruckland Holdings Ltd | London | 2020 |
| Brudis DB Holding Ltd | London | 2023 |
| Brudis DB Management Ltd | London | 2023 |
| Brueton Limited | Wolverhampton | 2019 |
| Brufern Holdings Ltd | Hebburn | 2022 |
| Bruford & Vallance Insurance Services Limited | Taunton | 2002 |
| Bruges Place Investments Limited | London | 2014 |
| Bruin Outfield Limited | London | 2021 |
| Bruj Ltd | Leicester | 2018 |
| Brum Office Holdings Ltd | Birmingham | 2023 |
| Brumby Capital Ltd | London | 2026 |
| Brummer & Partners (UK) Limited | London | 2009 |
| Brummer & Partners Asset Management (UK) Ltd | London | 2021 |
| Brummie Holdings Ltd | Kettering | 2024 |
| Brunatur UK Ltd | London | 2021 |
| Brunch Hospitality Limited | Warrington | 2026 |
| Brundle Bidco Limited | London | 2022 |