| Brandon Hire Group Limited | Harrogate | 2010 |
| Brandon Hire Limited | Harrogate | 1971 |
| Brandon Investment Group Ltd | Hawick | 2011 |
| Brandon Webster Limited | Harrogate | 2021 |
| Brandrisks Group Limited | Sevenoaks | 2005 |
| Brandrisks Limited | Sevenoaks | 2005 |
| Brands 001 Limited | Shirebrook | 2005 |
| Brands Futurists Limited | Rainworth, Mansfield | 2020 |
| Brandsclap Limited | Ilford | 2017 |
| Brandside Investments Limited | Suffolk | 2002 |
| Brandsoft Limited | Leeds | 2007 |
| Brandstore Limited | Milton Keynes | 2022 |
| Brandt Enterprises Ltd | Maryport | 2018 |
| Brandvestor Limited | Alcester | 2016 |
| Brandwarehouse.Co.Uk Limited | Berkshire | 1972 |
| Brandwiz Ltd | Slough | 2021 |
| Brandy Hole Shellfish Company Limited | Hockley | 2026 |
| Branex Limited | Hornchurch | 2016 |
| Brangabo Build Limited | Croydon | 2021 |
| Branlink Investments Limited | London | 2012 |
| Brannan Thermometers Limited | Cleator Moor | 1982 |
| Brannans (Southend) Limited | Leigh-On-Sea | 1988 |
| Brannares FIX Limited | London | 2025 |
| Brannigan Limited | Harrow | 2003 |
| Brannock Management Company Limited | Belfast | 2000 |
| Brannocks Close 1967 Limited | Bridgend | 2015 |
| Branshaw Limited | Ilkley | 1965 |
| Branson Corporation Limited | Downpatrick | 1993 |
| Branston 1964 Limited | Burton-On-Trent | 2014 |
| Branston Group Ltd | Coalville | 2020 |
| Branston Potatoes Limited | Lincoln | 2010 |
| Branston Prepared Foods Limited | Lincoln | 2006 |
| Branta Services Limited | Radstock | 2023 |
| Brantham Residential Estate Management Company Limited | High Wycombe | 2020 |
| Branton Farm (Hagans) Nurseries Limited | Branton | 2006 |
| Branton Industry Co., Ltd | Beckenham | 2012 |
| Branton Property Group Limited | Exeter | 2020 |
| Brants Property Company Limited | Edgware | 1963 |
| Brantz Limited | Macclesfield | 2011 |
| Brasier Motor Company Limited | London | 2015 |
| Brask Collections Ltd | Thornton Heath | 2023 |
| Brass Turned Parts Limited | Walsall | 1956 |
| Brasserie Restaurants Limited | Wolverhampton | 1986 |
| Brastad Airbnb Invest Limited | London | 2025 |
| Brastad Airbnb Limited | London | 2025 |
| Brasted 1962 Limited | Sandy | 2014 |
| Bratco Limited | London | 2025 |
| Brattas Utleietjenester Limited | London | 2024 |
| Bratton Commercial Developments Limited | Taunton | 2006 |
| Bratts Ladders Limited | Nottingham | 2007 |
| Bratu Logistics Ltd | Coventry | 2018 |
| Brauns Judaica (MCR) Ltd | London | 2011 |
| Braunsfelder Asset Management Ltd | London | 2023 |
| Bravas London Limited | Harrow | 2013 |
| Brave Bison 2021 Limited | London | 2021 |
| Brave Bold Brilliant Limited | London | 2023 |
| Brave Moves Ltd | London | 2021 |
| Brave OR Stupid Limited | Liverpool | 2015 |
| Bravedyne Limited | London | 1989 |
| Braveheart Financial Services Limited | Oxford | 2007 |
| Bravex Industries Ltd | Manchester | 2026 |
| Bravion Works Ltd | Doncaster | 2026 |
| Bravis Contracting Limited | Marlborough | 2020 |
| Bravo Eiendomsdrift Limited | London | 2018 |
| Bravopak Packaging Solutions Limited | Mirfield | 2025 |
| Bravura Ltd | London | 2020 |
| Brawn Limited | London | 2025 |
| Brawth Ltd | Glasgow | 2022 |
| Braxel Properties Limited | Sutton Coldfield | 1972 |
| Bray House Veterinary Services Limited | Bristol | 1998 |
| Brayford Development Company Limited | Lincoln | 1989 |
| Brayley Autos Limited | Bristol | 2015 |
| Brays Investigations Limited | Fareham | 2013 |
| Brayskies Ltd | Portishead | 2024 |
| Brayth Limited | London | 2023 |
| Brayton Lakeside Lodges Limited | Carlisle | 2012 |
| Braywood Consultancy Limited | Windsor | 2021 |
| Braywood Tree Surgery Limited | Maidenhead | 2013 |
| Brazier Estates Limited | Dorchester | 2023 |
| Brazier Industries Ltd | Casnewydd | 2017 |
| Brazier Systems and Consultants Limited | Southampton | 1986 |
| Brazil Ipiranga Petroleum Gulfstream Co., Ltd | Beckenham | 2021 |
| Brazil Street Investments Limited | Altrincham | 2016 |
| Brazilian Green Beans Ltd | Guildford | 2021 |
| Brazilian Ltd | London | 2021 |
| Brazilian Real Estate Ltd. | York | 2006 |
| BRB Founders Ltd | East Grinstead | 2015 |
| BRB Holdings Ltd | London | 2016 |
| BRB Independent Financial Advisers Limited | Newcastle-Under-Lyme | 2010 |
| BRB Investment Management Limited | Edinburgh | 2009 |
| BRB Systems Limited | Worcester | 2025 |
| Brbloomer Limited | Slough | 2007 |
| BRC Facilities Limited | Chobham | 2021 |
| Brdc Race Limited | Towcester | 1998 |
| BRE Furnishings Limited | Bognor Regis | 2026 |
| Bread & Fish 5000 Limited | Hertfordshire | 2007 |
| Bread and Breakfast Ltd | London | 2023 |
| Bread Foundry Ltd | Preston | 2019 |
| Breadmore Hopkins Ltd | Reading | 2010 |
| Breadwinners Spectacle Limited | Colney Heath | 2012 |