| British Turntable Industrial Limited | Professional & scientific | 1984 |
| Britlogix Ltd | Wholesale & retail | 2025 |
| Britmart Stores Limited | Wholesale & retail | 2025 |
| Britonic Haulage & Transport Ltd | Transport & logistics | 2025 |
| Brixks & Co Ltd | Construction | 2023 |
| Bri’S Strength and Fitness Limited | Arts & recreation | 2025 |
| Brkq Zest Limited | Wholesale & retail | 2025 |
| Broad HEY Limited | Health & social care | 2016 |
| Broadcom Enterprises PTY Ltd | Wholesale & retail | 2025 |
| Broadoak Builders Holdings Limited | Financial services | 2025 |
| Broadoak Engineering Services Limited | Professional & scientific | 2017 |
| Broccoli Solutions Limited | Information & communication | 2022 |
| Brogan Civil Engineering Limited | Construction | 2019 |
| Broken Colour Decorators Limited | Construction | 2001 |
| Broker Direct PLC | Financial services | 1994 |
| Broker Energy Claims Limited | Construction | 2022 |
| Bromborough Skip & Recycling Ltd | Water & waste | 2020 |
| Bromdog Ltd | Real estate | 2019 |
| Bromiley 2 Ltd | Wholesale & retail | 2023 |
| Bromley Cross Angling Society Limited | Arts & recreation | 2023 |
| Bromley Cross Chiropractic Ltd | Health & social care | 2025 |
| Bromley Cross Enterprises Limited | Arts & recreation | 2003 |
| Bromley Cross Football Club | Arts & recreation | 2011 |
| Bromley Cross Opticians Limited | Health & social care | 2003 |
| Bromley Cross Painting Services Ltd | Construction | 2013 |
| Bromley Cross Podiatry Ltd | Health & social care | 2013 |
| Bromleys Funeral Services Limited | Other services | 2011 |
| Bromtech Ltd | Information & communication | 2025 |
| Bronze Luxury Tanning Ltd | Other services | 2025 |
| Brook Homes (Hyde) Limited | Construction | 2002 |
| Brook Island Limited | Financial services | 2026 |
| Brookes Commercial Property Limited | Real estate | 2003 |
| Brookes-Wood Investments Ltd | Real estate | 2025 |
| Brookfield Hall Company Limited | Professional & scientific | 2016 |
| Brookfield Retail NW Ltd | Wholesale & retail | 2025 |
| Brookie Estates Limited | Real estate | 2023 |
| Brooklin Claims Consultants Ltd | Professional & scientific | 2008 |
| Brooklyn Fabrication Limited | Administrative & support | 2005 |
| Brooklyn Hot Chicken Ltd | Hospitality | 2020 |
| Brookside Farm Management Company Limited | Households | 2007 |
| Brookson (5415D) Limited | Professional & scientific | 2007 |
| Brookwest Investments Limited | Real estate | 2021 |
| Brotein Supplements. Ltd | Wholesale & retail | 2023 |
| Brothers Carpets & Flooring Ltd | Wholesale & retail | 2019 |
| Brothers Dream Ltd | Wholesale & retail | 2020 |
| Brothers Salon Ltd | Other services | 2024 |
| Brotox Aesthetics Limited | Health & social care | 2019 |
| Broughton Housing Limited | Households | 2024 |
| Brow Properties Limited | Real estate | 2022 |
| Brown Bitz Limited | Wholesale & retail | 2009 |
| Brown Free Range Eggs and Co Limited | Agriculture & fishing | 2025 |
| Brown Hare Properties Limited | Real estate | 2017 |
| Brown Pubs Limited | Hospitality | 2025 |
| Brown Rail Design Ltd | Information & communication | 2016 |
| Brownie Stop Ltd | Manufacturing | 2026 |
| Brownlow Associates Limited | Professional & scientific | 2008 |
| Brownlow Way Garage Limited | Wholesale & retail | 2013 |
| Browns Industrial Limited | Real estate | 2014 |
| BRQ Mini Market Ltd | Wholesale & retail | 2024 |
| BRR Enterprise Ltd | Wholesale & retail | 2015 |
| Brtizu Ltd | Wholesale & retail | 2025 |
| Bruce Construction Limited | Construction | 2016 |
| Bryce Bond Leisure Ltd | Hospitality | 2026 |
| Bryden Capital Ltd | Professional & scientific | 2023 |
| Bryden Finance Ltd | Professional & scientific | 2024 |
| Bryden Precision Engineering Ltd | Manufacturing | 2024 |
| Bryden Properties (NO.55) Limited | Real estate | 2024 |
| Bryden Properties (NO.55) Topco Ltd | Professional & scientific | 2024 |
| Bryden Properties Shelf Co (Bidco) Ltd | Real estate | 2024 |
| Bryden Properties Shelf Co (Topco) Ltd | Professional & scientific | 2024 |
| Bryden Ventures Ltd | Professional & scientific | 2023 |
| Brytech Solutions Ltd | Water & waste | 2003 |
| BS Creative Ltd | Construction | 2026 |
| BS Plug Ltd | Wholesale & retail | 2025 |
| BSA Networks Ltd | Information & communication | 2019 |
| BSC Ventures Ltd | Manufacturing | 2025 |
| BSE Partners International Ltd | Financial services | 2025 |
| BSK Orthodontics Limited | Health & social care | 2024 |
| Bsmp Ltd | Construction | 2021 |
| BST Brick Cutting Limited | Manufacturing | 2021 |
| BST Brickwork Limited | Construction | 2021 |
| Bstrong Studios NW Ltd | Arts & recreation | 2026 |
| BSX Limited | Water & waste | 2002 |
| BT Jones Property (UK) Ltd | Real estate | 2024 |
| BT Stewart Ltd | Other services | 2023 |
| BTA Theatricals Ltd | Arts & recreation | 2017 |
| BTB ALE House Limited | Hospitality | 2009 |
| BTB Estates Holdings Limited | Financial services | 2015 |
| BTB TAP Limited | Hospitality | 2016 |
| BTC19 Ltd | Administrative & support | 2022 |
| BTG Services Ltd | Financial services | 2024 |
| Btgm Group Limited | Financial services | 2021 |
| Btgm Property Limited | Real estate | 2026 |
| BTL Bolton Ltd | Real estate | 2025 |
| BTN Holdings Limited | Financial services | 2025 |
| Bubble Blue Cleaning Limited | Administrative & support | 2023 |
| Bubble Clenz Limited | Administrative & support | 2014 |
| Bubble Tea Group Ltd | Hospitality | 2025 |
| Bubbles N Shine Hand Car Wash Limited | Wholesale & retail | 2018 |
| Bubbles, Brooms, and Vans Ltd | Information & communication | 2025 |