| Brooklands Coffee Co Ltd | Hospitality | 2022 |
| Brooklands Investments Ltd | Real estate | 2004 |
| Brooklands Micro Ltd | Health & social care | 2024 |
| Brookline Lansdowne Ltd | Other services | 2016 |
| Brooklow Investments Limited | Financial services | 1934 |
| Brooklyn Deli Limited | Wholesale & retail | 2025 |
| Brooks Brothers and Sons Developments Limited | Construction | 2015 |
| Brookside Builders Limited | Construction | 2019 |
| Brooksiejnr Limited | Hospitality | 2023 |
| Brooktech Digital Limited | Professional & scientific | 2022 |
| Broom Chase Residents Association Limited | Households | 1976 |
| Broom Pizza Limited | Hospitality | 2026 |
| Broombridge Limited | Real estate | 2016 |
| Broomco (1541) Limited | Other services | 1998 |
| Broomco (1850) Limited | Extraterritorial | 1999 |
| Broomco (2156) Limited | Construction | 2000 |
| Broomco (4288) Limited | Professional & scientific | 2016 |
| Broomfield House Limited | Households | 1982 |
| Broomgrove Estates Limited | Real estate | 2013 |
| Broomgrove Gardens Management Limited | Households | 2017 |
| Broomgrove Properties Limited | Construction | 2012 |
| Broomgrove Property Management Limited | Real estate | 2024 |
| Broomgrove Trust(The) | Health & social care | 1983 |
| Broomhall Estates Limited | Real estate | 2016 |
| Broomhall Properties Limited | Real estate | 2017 |
| Broomhall Under 3S Limited | Education | 2014 |
| Broomhead Bathrooms Ltd | Construction | 2024 |
| Broomhead Holdings Limited | Real estate | 2022 |
| Broomhead Plumbing Limited | Construction | 2000 |
| Broomhead Surveyors Ltd | Professional & scientific | 2023 |
| Broomhill Cards and Gifts Ltd | Wholesale & retail | 2026 |
| Broomhill Chiropractic Clinic Ltd | Health & social care | 2008 |
| Broomhill Fried Chicken Ltd | Hospitality | 2025 |
| Broomhill Housing Limited | Real estate | 2002 |
| Broomhill Pizza Ltd | Hospitality | 2026 |
| Broomhill Social Ltd | Hospitality | 2026 |
| Broomhill Tavern UK Ltd | Hospitality | 2015 |
| Broomhill Woodfire & Pizza Limited | Hospitality | 2025 |
| Brother Bear Films Limited | Information & communication | 2019 |
| Brother Properties Ltd | Real estate | 2025 |
| Brothers Auto Spares Ltd | Wholesale & retail | 2026 |
| Brothers Inc Limited | Administrative & support | 2025 |
| Broughton House Management Company Limited | Households | 2004 |
| Broughton Property & Lettings Ltd | Real estate | 2026 |
| Brown & Co (Electrical Engineers) Limited | Construction | 1928 |
| Brown & Rear Accountants Limited | Professional & scientific | 2024 |
| Brown Mcleod Limited | Professional & scientific | 1994 |
| Brown's Cafe Ltd | Hospitality | 2024 |
| Brown's Whitehouse Buckingham Limited | Other services | 1999 |
| BROWN2 Profit Consultancy Limited | Professional & scientific | 1998 |
| Brownberry Project Management Limited | Professional & scientific | 2014 |
| Brownhawk Projects Ltd | Information & communication | 2023 |
| Brownie & Clyde Ltd | Hospitality | 2026 |
| Brownill Vickers (Holdings) Limited | Financial services | 2025 |
| Brownill Vickers Limited | Professional & scientific | 2009 |
| Browns Automotive Limited | Wholesale & retail | 2019 |
| Browns Hairdressing Group Towcester Ltd | Other services | 2016 |
| Browns Hairdressing Oundle Ltd | Other services | 2022 |
| Browns Harpenden Limited | Other services | 2003 |
| Browns Management Services Limited | Professional & scientific | 2003 |
| Browns Market Harborough Limited | Other services | 2001 |
| Browns Reloaded Market Harborough Ltd | Other services | 2015 |
| Browns Salon Services Ltd | Households | 2011 |
| Browns Stony Stratford Limited | Other services | 2007 |
| Browns Tattoo Studio Ltd | Other services | 2018 |
| Brownstreet Ltd | Real estate | 2017 |
| Browzan Ltd | Information & communication | 2015 |
| Broxy Trans Ltd | Transport & logistics | 2020 |
| BRR Lettings Limited | Real estate | 2026 |
| Bruce & Butler Limited | Professional & scientific | 2015 |
| Bruce Family Holdings Ltd | Financial services | 2025 |
| Bruce’S Bargains Limited | Wholesale & retail | 2026 |
| Brugs Ltd | Construction | 2018 |
| Bruling Ltd | Arts & recreation | 2024 |
| Brunch & Beyond Ltd | Hospitality | 2025 |
| Brunch and Lunch Foods Ltd | Hospitality | 2025 |
| Brunch and Lunch the Moor Ltd | Hospitality | 2017 |
| Brunchaway Ltd | Hospitality | 2026 |
| Brunchaway Original Ltd | Wholesale & retail | 2026 |
| Bruno Espresso Bar Limited | Hospitality | 2024 |
| Bruno Group Recruitment Ltd | Health & social care | 2025 |
| Brunsmeer Athletic Association F.C. Limited | Arts & recreation | 2009 |
| Brunswick Holiday Rentals Ltd | Hospitality | 2018 |
| Brupaks (UK) Limited | Hospitality | 2009 |
| Brush DJ Ltd | Information & communication | 2018 |
| Brushdale Habitat Management Limited | Construction | 2017 |
| Brushtide Ltd | Wholesale & retail | 2026 |
| Brutalist Ltd | Information & communication | 2022 |
| Bryan Bell Services Limited | Mining & quarrying | 2015 |
| Bryan Grey & Co Ltd | Professional & scientific | 2002 |
| Bryant Orthopaedics Limited | Health & social care | 2015 |
| Bryar Food Ltd | Wholesale & retail | 2022 |
| Bryerny Building Compliance Limited | Professional & scientific | 2018 |
| Bryerny Building Physics Limited | Professional & scientific | 2009 |
| Brympton House Estates Limited | Hospitality | 2011 |
| Bryn Coed Homes Limited | Real estate | 1996 |
| Bryn Coed Management Ltd | Households | 2017 |
| BS Direct Group Limited | Information & communication | 2018 |
| BS4U Limited | Professional & scientific | 2015 |
| BSA Trading Co Ltd | Wholesale & retail | 2026 |