| Breathsense Limited | Borehamwood | 2022 |
| Breaze Health Ltd | Spalding | 2018 |
| Brec (NE) Limited | Jarrow | 1999 |
| Breck Casings Ltd | Wigan | 2016 |
| Breckan Limited | Stromness | 1999 |
| Breckenholme Trading Company Ltd | | 2007 |
| Breckland Fabrications Limited | Norwich | 2013 |
| Breckland Finishing Limited | Swaffham | 2011 |
| Breckland Lasers Limited | Norwich | 2008 |
| Breckland Maintenance Services Ltd | Brandon | 2006 |
| Brecknell Willis Company Limited | Kingston Upon Thames | 2025 |
| Brecknock Engineering Ltd | Derby | 2016 |
| Brecks Engineering Limited | Selby | 2014 |
| Breco Ropeways Limited | London | 1958 |
| Brecon Beacons Candle Company Ltd | Swansea | 2025 |
| Brecon Carreg Ltd | Carmarthenshire | 2019 |
| Brecon Chocolates Limited | Brecon | 2012 |
| Brecon Designs Limited | Brynmawr | 2007 |
| Brecon Energy Limited | Newport | 2015 |
| Brecon Engineering Supplies Limited | Powys | 2004 |
| Brecon Sword Ltd | Aylesbury | 2025 |
| Breconcherry Limited | Milton Keynes | 1971 |
| Bredbury Car Services Ltd | Stockport | 2017 |
| Bredd Limited | Bristol | 2024 |
| Breddaman Ltd | London | 2024 |
| Bree's Herbal Teas Ltd | Keighley | 2022 |
| Breedon Electrical Fire & Security Limited | Nottingham | 2014 |
| Breen Analytical Instruments Limited | Beckenham | 2025 |
| Breen Educational Resources Ltd | Bakewell | 2019 |
| Breeosh Ltd | Sheffield | 2022 |
| Breeze Air Conditioning & Refrigeration Ltd | Noak Bridge | 2014 |
| Breeze Boat Maintenance Limited | Newton Abbot | 2015 |
| Breeze Cleaning and Care Ltd | Stockport | 2017 |
| Breeze Craft Beds Limited | Cleckheaton | 2019 |
| Breeze Fire Protection Ltd | Hornchurch | 2013 |
| Breeze Hill Ltd | Buckley | 2015 |
| Breeze House Designs Limited | Leek | 2013 |
| Breeze Installations Ltd | Rowley Regis | 2010 |
| Breeze International Ltd. | Oswaldtwistle | 2007 |
| Breeze Kitchens & Bedrooms Ltd | Birmingham | 2016 |
| Breeze Limited | Manchester | 1984 |
| Breeze Marine Ltd | Newcastle Upon Tyne | 2018 |
| Breeze of Casablanca Ltd | London | 2025 |
| Breeze Special Anode Ltd | London | 2022 |
| Breeze Technologies Ltd | Lydney | 2003 |
| Breezefield Products Limited | London | 2026 |
| Breezeyrugs Limited | Lowestoft | 2025 |
| Breezion.Store Ltd | Edgware | 2026 |
| Brefts Flooring Ltd | Uxbridge | 2025 |
| Breg Products Limited | Brighouse | 1974 |
| Bregazzi Rail Engineering Limited | Derby | 2026 |
| Breheny Bros UK Ltd | Wigan | 2026 |
| Breheny Technology Services Ltd | Wigan | 2026 |
| Brehon Skincare Ltd | Omagh | 2025 |
| Breid Ltd | London | 2016 |
| Breitenfeld UK Limited | Sheffield | 1988 |
| Brekkie Ltd | Dalkeith | 2024 |
| Brello Services Limited | Derby | 2018 |
| Brelsen Ltd | London | 2020 |
| Bremaco Ltd | Southampton | 2022 |
| Bremadent Premier (Bristol) Limited | Leytonstone | 2007 |
| Bremadent Premier (London) Limited | London | 2015 |
| Breman Ltd | Milton Keynes | 2025 |
| Brembo Ltd | Kington | 2025 |
| Bremco UK Limited | Barnstaple | 2009 |
| Bremer Engineering Company Limited | Rugby | 2017 |
| Bremith Ltd | Tolworth | 2018 |
| Bremont Watch Company Limited | Henley-On-Thames | 2005 |
| Bremps Foods Limited | Milton Keynes | 2023 |
| Bremsen Technik Reman Limited | Richmond | 2016 |
| Bren Carpentry Ltd | Abertillery | 2021 |
| Brena Automation Limited | Stourbridge | 2003 |
| Brenchley Conversions Ltd | Tonbridge | 2018 |
| Brencom Ltd | London | 2026 |
| Brend & Stainthorpe Ltd | Lingfield | 2012 |
| Brend Build Ltd | Lingfield | 2015 |
| Brenda & Doris Ltd | Plymouth | 2020 |
| Brenda International PTE Ltd | Bushey | 2025 |
| Brenda Ling Limited | London | 2025 |
| Brendan Mccormick Events AV Ltd | Dunstable | 2003 |
| Brendan O'Boyle Ltd | Randalstown | 2015 |
| Brendan the Chilli MAN Limited | Dunstable | 2020 |
| Brendan Wright Mechanical Ltd | Welwyn Garden City | 2014 |
| Brendeck Limited | Alfreton | 1981 |
| Brendon Forbes Carpentry Limited | Wokingham | 2024 |
| Brendon Limited | Taunton | 1988 |
| Brenell Label Company Limited | Nottingham | 1999 |
| Brenell Labels Holdings Limited | Nottingham | 2025 |
| Brengor Innovation Ltd | Leeds | 2018 |
| Breningate Enterprise Ltd | Washington | 2024 |
| Brenley Limited | Faversham | 2019 |
| Brenmoor Ltd | Keighley | 2005 |
| Brenn Ltd | London | 2026 |
| Brennan Composites Ltd | Cambridge | 2017 |
| Brennan Creative Limited | Manchester | 2022 |
| Brennan Fabrications Ltd | Andover | 2021 |
| Brennan Steel Fabrication Ltd | London | 2021 |
| Brennan Woodworking Ltd | Leeds | 2023 |
| Brennan's Brewery UK Ltd | Oswestry | 2022 |
| Brennand Schoolwear Limited | Halliwell Road | 1996 |