| BR1AN Limited | Harrogate | 2020 |
| BR786 Limited | Chorley | 2018 |
| BRA Bygge I Svealand Limited | London | 2018 |
| BRA Latar Limited | London | 2022 |
| Braaap Cloud Ltd. | Newry | 2023 |
| Braba Limited | Antrim | 2024 |
| Brabat Limited | Antrim | 2024 |
| Brabco 809 Limited | Liverpool | 2008 |
| Brabourne Films Limited | Canterbury | 1956 |
| Brabur Limited | Manchester | 2024 |
| Bracadale Properties Ltd | Carnbroe | 2009 |
| Bracelett Developments Ltd | Garvagh | 2021 |
| Bracewell Flats Limited | | 2006 |
| Bracey’S Accountants (ST Albans) Limited | Hitchin | 2024 |
| Bracher Brothers Limited | Sutton Coldfield | 1960 |
| Brackenhoe Managing Company Limited | Newcastle Upon Tyne | 2019 |
| Brackenhurst Healthcare Ltd | Radlett | 2011 |
| Brackenreed Limited | Harrogate | 2026 |
| Brackenyx Property Holdings Ltd | Doncaster | 2026 |
| Brackla Engineering Co Limited | Bridgend | 1976 |
| Brackla Holdings Limited | Bridgend | 1994 |
| Brackley Motors & Building Contractors Limited | Northants | 1958 |
| Brackley Pet Healthcare Limited | Bristol | 2010 |
| Bracknell One Limited | Bristol | 2010 |
| Bracknell Personnel Services Limited | Bracknell | 2020 |
| Bracknell Two Limited | Bristol | 2010 |
| Bracode Limited | London | 2003 |
| Brad and Dunnstreet Limited | Market Rasen | 2022 |
| Brad Prep Limited | Huddersfield | 2007 |
| Bradbridge Investments Limited | Bury | 2021 |
| Bradbury Catering Ltd | Ballymena | 2017 |
| Bradbury Chauffeur Drive Limited | Prestonpans | 2001 |
| Bradbury Developments (Ireland) Limited | Belfast | 2001 |
| Bradbury Outdoor Spaces Ltd | Buckingham | 2023 |
| Bradbury Security Limited | Scunthorpe | 2000 |
| Bradcroft Limited | Bury | 2021 |
| Braddicks Amusements Limited | Westward Ho! | 2012 |
| Bradeley Green Limited | Whitchurch | 1993 |
| Braden Threadgold Holdings Limited | London | 2006 |
| Brades Skelton & Tyrack Limited | Sheffield | 1997 |
| Bradfield Investment Company Limited | Newbury | 2008 |
| Bradfield Motor Services Ltd | Reading | 2008 |
| Bradford & Bingley Investments | Leeds | 1997 |
| Bradford & Leeds Properties Ltd | Ilkley | 1965 |
| Bradford 4X4 Breakers Limited | Bradford | 2022 |
| Bradford City Limited | Harrogate | 2011 |
| Bradford Company Group Ltd | London | 2025 |
| Bradford Hotel Assets (NO 2) Limited | Mancheter | 2014 |
| Bradford Hotel Assets Limited | Manchester | 2014 |
| Bradford Ice Arena Limited | West Yorkshire | 1996 |
| Bradford on Avon Golf Course Limited | Corsham | 1986 |
| Bradford Rubber Services (Holdings) Limited | Bradford | 2015 |
| Bradfords Signs Limited | Camberley | 2010 |
| Bradley Business Park (Huddersfield) Limited | York | 2010 |
| Bradley Property Services Limited | Leigh On Sea | 2002 |
| Bradley's Dairy Limited | Cornwall | 2005 |
| Bradshaw Properties Ltd | Bournemouth | 2015 |
| Bradshaws (Car Repairs) Ltd | Oxford | 2015 |
| Bradstone Holdings (Glasgow) Limited | Glasgow | 2010 |
| Bradstow Management Limited | Westerham | 1994 |
| Bradwell Properties Limited | Derbyshire | 2004 |
| Bradwell Quay Holdings Limited | Bradwell On Sea | 1963 |
| Brady Brothers Limited | Walsall | 2008 |
| Brady Industries Limited | Birmingham | 1935 |
| Brae Manor Management Company Ltd | Belfast | 2001 |
| Braehead Homes Limited | Aberdeen | 2011 |
| Braehead Hotel Limited | Lanarkshire | 1999 |
| Braehead Suites Hotel Limited | Lanarkshire | 1999 |
| Braepac GB Limited | Leicester | 2021 |
| Braeside Freehold Limited | Faversham | 2024 |
| Braeside Freehold LS Ltd | Faversham | 2025 |
| Braeside Infants School Limited | Loughton | 2025 |
| Braeside Junior School Limited | Loughton | 2025 |
| Braeside Nursery School Limited | Loughton | 2025 |
| Braeside Preparatory School Limited | Loughton | 2025 |
| Braeside Primary School Limited | Loughton | 2025 |
| Braeview Apartments Ltd | Belfast | 2000 |
| Braexpert Holdings Limited | Edgware | 2016 |
| Brafe Trustee Limited | Suffolk | 2005 |
| Brag Productions Limited | London | 2008 |
| Bragg 1970 Limited | Chorley | 2014 |
| Brags and Brams Ltd | Enfield | 2024 |
| Bragvad Holding Limited | London | 2021 |
| Brahams 1965 Limited | Feltham | 2014 |
| Brahma Limited | London | 2002 |
| Brahmaputra Trading Co., Ltd | London | 2024 |
| Braid Maidens Limited | St. Albans | 2024 |
| Braidfield Land (2021) Limited | Glasgow | 2021 |
| Braidsnco Ltd | Bristol | 2026 |
| Brailes Hill View Company Limited | Shipston-On-Stour | 2009 |
| Brain Crown Buckley Limited | Cardiff | 1997 |
| Brain Fit Ltd | Bradford On Avon | 2017 |
| Brain Freeze Designs Ltd | Leicester | 2015 |
| Brain in a HAT Limited | Coventry | 2016 |
| Brain Logix Limited | Cambridge | 2013 |
| Brain Research UK Limited | London | 2022 |
| Brain Stormer Ltd | Ipswich | 2025 |
| Brainalive Research Ltd | Manchester | 2025 |
| Brainercise Limited | London | 2015 |
| Brainform Limited | London | 2025 |