| Britstone Maah Properties Limited | Real estate | 2025 |
| Britt-International Limited | Other services | 2026 |
| Brittain Medical Reporting Limited | Administrative & support | 2016 |
| Brittea House Limited | Hospitality | 2026 |
| Brittop Limited | Other services | 2017 |
| Britwise Buys Ltd | Wholesale & retail | 2024 |
| Brivanta Property Sourcing Ltd | Real estate | 2026 |
| Brjd Properties Limited | Real estate | 2025 |
| BRL Bathrooms Limited | Construction | 2021 |
| BRO Investment Group Limited | Financial services | 2025 |
| BRO Property Partners One Ltd | Real estate | 2025 |
| BRO Property Partners Two Ltd | Real estate | 2025 |
| Bro-Cat Enterprises Limited | Real estate | 1990 |
| Broad ELM Consultants Limited | Professional & scientific | 2014 |
| Broad Lane Kirkby Limited | Financial services | 2024 |
| Broaddale Bricks and Mortar Ltd | Real estate | 2020 |
| Broaddale Direct Services Limited | Construction | 2013 |
| Broadeaves Training Limited | Administrative & support | 2018 |
| Broadgate Asset Management Limited | Real estate | 2000 |
| Broadgreen Gardening Services Ltd | Professional & scientific | 2022 |
| Broadgreen Tyres Limited | Wholesale & retail | 2025 |
| Broadlane Food Limited | Hospitality | 2022 |
| Broadlanepizza Limited | Hospitality | 2024 |
| Broadoak Malvern Ltd | Transport & logistics | 2025 |
| Broadway Carpets and Flooring Ltd | Wholesale & retail | 2021 |
| Broadway Florists & Discounts Ltd | Wholesale & retail | 2025 |
| Broadway Fresh Food Ltd | Hospitality | 2025 |
| Broadway Hair Style Ltd | Other services | 2022 |
| Broadway Jewellers Limited | Wholesale & retail | 1996 |
| Broadway RAW UK Limited | Wholesale & retail | 2026 |
| Broadway Structural Repairs Limited | Wholesale & retail | 1984 |
| Broadwise Limited | Information & communication | 2019 |
| Broady Barber Shop Ltd | Other services | 2022 |
| Broasted Limited | Hospitality | 2025 |
| Brobuild Construction Limited | Construction | 2016 |
| Brock Carmichael Limited | Professional & scientific | 2026 |
| Brockban and Mellor Limited | Hospitality | 2014 |
| Brockenhurst Shipping Limited | Other services | 2014 |
| Brockett Building Services Limited | Construction | 2025 |
| Brockstone Ltd | Administrative & support | 2013 |
| Broken Brain Studio Limited | Information & communication | 2013 |
| Broken Hand Limited | Households | 2006 |
| Broker Services Ltd | Financial services | 2018 |
| Brokermind AI Ltd | Information & communication | 2026 |
| Bromac Heating,Plumbing and Electrical Ltd | Other services | 2012 |
| Bromer Energy Ltd | Construction | 2024 |
| Bromps Group Ltd | Construction | 2020 |
| Brompton Court Management Limited | Households | 1992 |
| Brompton Medical Ltd | Health & social care | 2021 |
| Brompton Washscape Ltd | Professional & scientific | 2009 |
| Bromwich Products Ltd | Wholesale & retail | 2019 |
| Bronshill Management Limited | Households | 1982 |
| Bronte Youth & Community Centre | Arts & recreation | 2009 |
| Bronz Bodz Limited | Other services | 2025 |
| Bronzie U.K. Ltd | Other services | 2013 |
| Brook Barn BED + Breakfast Ltd | Hospitality | 2014 |
| Brook Car Hire Limited | Administrative & support | 2009 |
| Brook Enterprises Limited | Hospitality | 1954 |
| Brook Hall Hotel Ltd | Hospitality | 2025 |
| Brook Hollow Limited | Professional & scientific | 2009 |
| Brook House Hops Ltd | Wholesale & retail | 2018 |
| Brook North West Ltd | Professional & scientific | 2023 |
| Brook View (Ashfield) Ltd | Real estate | 2025 |
| Brook-Bridge Construction Development Limited | Real estate | 2024 |
| Brookbirch Landscapes Limited | Administrative & support | 2017 |
| Brookdale Road Management Company (Liverpool) Limited | Real estate | 2015 |
| Brooke Harrison Recruitment Limited | Administrative & support | 2016 |
| Brookelle Ltd | Financial services | 2025 |
| Brooker Groundworks Limited | Construction | 2016 |
| Brookes Bell LLP | | 2005 |
| Brookfield (NW) Ltd | Real estate | 2019 |
| Brookfield MOT Ltd | Wholesale & retail | 2019 |
| Brookfield Produce Limited | Wholesale & retail | 2003 |
| Brookfield Properties (NW) Limited | Real estate | 2016 |
| Brookfield Property Limited | Real estate | 2007 |
| Brooklea Meadows Freeholds Limited | Real estate | 2007 |
| Brooklea Meadows Leaseholds Limited | Real estate | 2012 |
| Brooklea Meadows Management Company Limited | Extraterritorial | 2010 |
| Brooklyn Home Limited | Health & social care | 1996 |
| Brooklyn Properties Holdings Limited | Financial services | 2026 |
| Brooklyn Properties Limited | Construction | 1999 |
| Brooks Beckman Limited | Financial services | 2020 |
| Brookson (5040C) Limited | Administrative & support | 2007 |
| Brookson (5487M) Limited | Administrative & support | 2007 |
| Brookson (5617H) Limited | Administrative & support | 2007 |
| Brookwood Holdings Limited | Hospitality | 2023 |
| Brooles Technical Services Limited | Other services | 2008 |
| Broom and Bucket Ltd | Administrative & support | 2022 |
| Broomlands Management Company Ltd | Households | 2021 |
| Brosna International Consultants Ltd | Professional & scientific | 2022 |
| Brostes Buffets Ltd | Hospitality | 2025 |
| Brother Beats Limited | Other services | 2014 |
| Brother Eats Limited | Hospitality | 2016 |
| Brough's Electrical Ltd | Construction | 2026 |
| Broughton Developments (Liverpool) Ltd | Extraterritorial | 2015 |
| Broughton Living Ltd | Real estate | 2022 |
| Brown and Beyond Ltd | Education | 2026 |
| Brown Barber Ltd | Other services | 2026 |
| Brown Medical Limited | Administrative & support | 2010 |
| Brown Property NW Ltd | Real estate | 2020 |