| Brandspresso Limited | Weston-Super-Mare | 2019 |
| Brandstrat Ltd | Bedford | 2016 |
| Brandy Bay Productions Limited | London | 2023 |
| Brandy Hole Moorings Limited | Hockley | 2010 |
| Brandywell Greyhound Racing Company (1976) Limited | Londonderry | 1976 |
| Braneworld Limited | London | 2025 |
| Brangetsfit Ltd | Stevenage | 2025 |
| Brankholm Media Limited | Glasgow | 1990 |
| Branksome Park Tennis Cafe Ltd | Poole | 2024 |
| Brantham Athletic Football Club Limited | Witham | 2016 |
| Brantingham Parks Limited | Beverley | 2011 |
| Brantside Ltd | Belfast | 2016 |
| Brash Theatre Company Ltd | Newcastle Upon Tyne | 2020 |
| Brass & Wings Ltd | London | 2019 |
| Brass Bands England | Barnsley | 2012 |
| Brass House Entertainment Ltd | Harrow | 2020 |
| Brass Knuckle Development Ltd | Dundee | 2026 |
| Brass Monkey Theatre | London | 2010 |
| Brasscals Productions Ltd | Stockport | 2024 |
| Brasshound Ltd | Sheffield | 2013 |
| Brassneck Saints Ltd | Castlederg | 2020 |
| Brassneck Theatre Company | Belfast | 2009 |
| Braun ET Ltd | Liverpool | 2025 |
| Braunston Marina Limited | Daventry | 1988 |
| Braunstone Adventure Playground | Leicestershire | 2005 |
| Brave Allstars Competition Teams Norwich Limited | Norwich | 2018 |
| Brave Allstars Limited | Norwich | 2016 |
| Brave and Lost Ltd | Canterbury | 2018 |
| Brave Arts Theatre Company Ltd | Swansea | 2022 |
| Brave Balance Yoga Ltd | London | 2023 |
| Brave Biscuit Studios C.I.C. | Falmouth | 2020 |
| Brave Blue Limited | Poole | 2024 |
| Brave Bold Drama Community Interest Company | Weymouth | 2017 |
| Brave Cause Limited | London | 2022 |
| Brave Chicken Animation Ltd | Hull | 2025 |
| Brave Day Productions Ltd | Manchester | 2015 |
| Brave Hearted Productions Limited | London | 2024 |
| Brave Hearts Academy CIC | South Croydon | 2024 |
| Brave Mirror Productions Ltd | Felixstowe | 2021 |
| Brave Rave Events Ltd | Cardiff | 2022 |
| Brave Rival Ltd | Millom | 2023 |
| Brave Souls Tattoo Studio Ltd | Ludlow | 2024 |
| Brave Words CIC | Leeds | 2018 |
| Braveheart Archery UK CIC | Glasgow | 2025 |
| Braveheart Martial Arts Ltd | Glasgow | 2018 |
| Braveheart MMA Ltd | Kirkcaldy | 2025 |
| Braveheart Promotions Limited | Kirkcaldy | 2025 |
| Bravehearts Boxing Gym Ltd | Hamilton | 2015 |
| Braveheart’S Boxing Fitness & Community Gym Ltd | Stirling | 2026 |
| Bravehurst Limited | Mildenhall | 2023 |
| Braves Sporting Club CIC | London | 2020 |
| Bravo Entertainment Limited | Clevedon | 2019 |
| Bravo India Flying Group Limited | Stockport | 1980 |
| Bravo Theatre Arts Limited | Ipswich | 2015 |
| Bravo Theatre Company Limited | Wigan | 2014 |
| Bravour Limited | Reading | 1982 |
| Bravura TBY | Stokesley | 1994 |
| Braw Buoys Limited | Eyemouth | 2015 |
| Braw Buoys Theatre Company Limited | Eyemouth | 2015 |
| Braw Clan Limited | Biggar | 2021 |
| Braw Fitness Ltd | Blairgowrie | 2022 |
| Braw Limited | Glasgow | 2018 |
| Braw Productions Limited | Dundee | 2023 |
| Brayford Trust Limited | Lincoln | 1969 |
| Brayton Park Limited | Hemel Hempstead | 2024 |
| Brazen Music Management Limited | London | 2022 |
| Brazen Studios Ltd | Glasgow | 2025 |
| Brazier Country Pursuits Limited | Worcestershire | 2003 |
| Brazil Tattoo Ltd | Coventry | 2023 |
| Brazilarte Circle CIC | Southend-On-Sea | 2020 |
| Brazilarte Limited | Southend-On-Sea | 2012 |
| Brazilia Limited | Cromer | 2005 |
| Brazilian Fantasy Ltd | London | 2010 |
| Brazilian INK Collective Ltd | Coventry | 2025 |
| Brazilian JIU Jitsu School Belfast Limited | Carryduff | 2023 |
| Brazilian Soccer Schools and Football Academies Limited | Oxford | 1999 |
| Brazley Residents CIC | Bolton | 2019 |
| Brazzle Holdings Limited | London | 2020 |
| Brazzle Limited | London | 2012 |
| BRB Production Services Limited | Birmingham | 2014 |
| Brbl Fitness & Nutrition Ltd | Renfrew | 2025 |
| BRC Promotions Ltd | Stockport | 2009 |
| Brcrds Ltd | London | 2026 |
| BRD Entertainment Ltd | Rochdale | 2025 |
| Brdbx Ltd | Dorchester | 2024 |
| BRE Francis Ltd | London | 2022 |
| Breach Theatre | St. Leonards-On-Sea | 2019 |
| Breachcroft Limited | London | 2013 |
| Bread and BUS Stop Ltd | Dorchester | 2024 |
| Bread and Honey Limited | Pewsey | 2012 |
| Bread Street Films Limited | Bournemouth | 2011 |
| Bread Studios Ltd | Burscough | 2021 |
| Breadcrumbs Game Ltd | Richmond | 2017 |
| Bready & District Ulster-Scots Development Association | Strabane | 2003 |
| Breaflex Limited | London | 2025 |
| Break 'N Dish (Newport) Ltd | Caerleon | 2015 |
| Break a LEG Academy Ltd | Glasgow | 2024 |
| Break a LEG Theatre and Events Limited | London | 2024 |
| Break a LEG Theatre Company CIC | Burnham-On-Sea | 2026 |
| Break Away DNB Ltd | Newton Abbot | 2023 |