| Back to Original Limited | Administrative & support | 2024 |
| Backface Limited | Professional & scientific | 2016 |
| Backgarden Bantams Ltd | Agriculture & fishing | 2025 |
| Background Technologies Limited | Information & communication | 2026 |
| Backlight Pictures Ltd | Information & communication | 2003 |
| BACKROW900 Ltd | Real estate | 2025 |
| Backstage Artists Limited | Arts & recreation | 2021 |
| Bacobs & NG Ltd | Real estate | 2024 |
| Bacs West Midlands Limited | Administrative & support | 2010 |
| BAD and Boujee Nail Salon Ltd | Other services | 2022 |
| BAD and Boujee Nails Ltd | Other services | 2026 |
| BAD Apple Hair UK Ltd | Arts & recreation | 2008 |
| BAD Blvd Ltd | Wholesale & retail | 2023 |
| BAD Decisions Ltd | Hospitality | 2025 |
| Badal G Limited | Wholesale & retail | 2024 |
| Badar Real Estate Limited | Real estate | 2022 |
| Badar Trading Limited | Wholesale & retail | 2025 |
| Badar World Treaders Ltd | Wholesale & retail | 2025 |
| Badass Limited | Wholesale & retail | 2021 |
| Badawi Medics Limited | Health & social care | 2020 |
| Baddeley Partners & Co Ltd | Hospitality | 2022 |
| Bader 1966 Limited | Extraterritorial | 2014 |
| Bader Restaurant 2 Ltd | Hospitality | 2024 |
| Bader Restaurant Ltd | Hospitality | 2020 |
| Badger Anodising (Birmingham) Limited | Manufacturing | 1985 |
| Badger Healthcare Limited | Health & social care | 2006 |
| Badger Investments | Financial services | 2017 |
| Badger Medical Limited | Health & social care | 2002 |
| Badgermed Diagnostics Limited | Health & social care | 2025 |
| Badges Plus (UK) Limited | Manufacturing | 2013 |
| Badges Plus Holdings Limited | Professional & scientific | 2007 |
| Badges Plus Limited | Manufacturing | 1976 |
| Badhan Holdings Ltd | Financial services | 2024 |
| Badhan Optical Ltd | Health & social care | 2024 |
| Badhan Property Ltd | Real estate | 2024 |
| Badhan Therapy Ltd | Health & social care | 2022 |
| Badial | | 2000 |
| Badley Baked Ltd | Manufacturing | 2023 |
| Badminton Warriors Ltd | Education | 2025 |
| Badr Group Ltd | Real estate | 2025 |
| Badra Motors Limited | Wholesale & retail | 2024 |
| Badshah Conference & Banqueting Palace Ltd. | Hospitality | 2011 |
| Badshah Palace Ltd | Hospitality | 2026 |
| Baeh Ltd | Real estate | 2025 |
| BAF Constructions Limited | Construction | 2024 |
| BAFFX17 Ltd | Professional & scientific | 2022 |
| Bafz Ltd | Wholesale & retail | 2024 |
| Bagel Street Ltd | Hospitality | 2025 |
| Baggaley Services Limited | Professional & scientific | 2023 |
| Baggeridge Village Management Company Limited | Households | 2015 |
| Baggie Builders Ltd | Construction | 2019 |
| Baggo Express Ltd | Transport & logistics | 2025 |
| Bagha Advisory Ltd | Information & communication | 2026 |
| Baghal Palace Limited | Real estate | 2020 |
| Bagleys Road RTM Company Limited | Households | 2011 |
| Bagmark Ltd | Wholesale & retail | 2026 |
| Bagpiper for Hire Ltd | Arts & recreation | 2025 |
| Bags Junction Ltd | Wholesale & retail | 2015 |
| Bags R US Ltd | Wholesale & retail | 2025 |
| Bagsoc Limited | Hospitality | 2017 |
| Baguette 4 U Limited | Hospitality | 2010 |
| Baguette 4 U Stephenson Limited | Hospitality | 2010 |
| Baguette DU Maison (UK) LLP | | 2008 |
| Baguette DU Maison 2 Ltd | Wholesale & retail | 2016 |
| Baguette DU Maison Limited | Wholesale & retail | 2004 |
| Baguette World Ltd. | Hospitality | 2018 |
| Baguettes 4 Less Limited | Hospitality | 2010 |
| Bagus UK Limited | Hospitality | 2021 |
| BAH Investment Design Corporation Ltd. | Financial services | 2019 |
| BAH Remit Limited | Financial services | 2022 |
| BAH Travel Company Limited | Administrative & support | 2018 |
| Bahar Holdings Limited | Financial services | 2026 |
| Bahar Newtown Ltd | Hospitality | 2019 |
| Bahashti Naan Shop Ltd | Manufacturing | 2019 |
| Bahay Developments Ltd | Real estate | 2025 |
| Bahdr Group Ltd | Information & communication | 2025 |
| Bahgi Property Ltd | Real estate | 2025 |
| Bahgna Limited | Hospitality | 2024 |
| Bahia DZ Cafe Ltd | Transport & logistics | 2021 |
| Bahia Properties Ltd | Real estate | 2025 |
| Bahia Selling Group Limited | Hospitality | 2022 |
| Bahja Limited | Transport & logistics | 2021 |
| Bahndee Ltd | Real estate | 2023 |
| Bahouse Ltd | Real estate | 2023 |
| Bahran Transport Ltd | Transport & logistics | 2025 |
| Bahria Consulting Ltd | Construction | 2023 |
| Bahria Real Estates Ltd | Real estate | 2025 |
| BAI & BAZ Investments Limited | Real estate | 2025 |
| BAI JI Consultancy Limited | Administrative & support | 2019 |
| Baig & Baig Accountants Ltd | Professional & scientific | 2023 |
| Baig Consulting Civil Engineering Ltd | Professional & scientific | 2025 |
| Baig Locums Ltd | Health & social care | 2007 |
| Baig Wholesale Limited | Wholesale & retail | 2025 |
| Bailey 'S Jerk and Grill Ltd | Hospitality | 2026 |
| Bailey Business Group Ltd | Professional & scientific | 2026 |
| Bailey Clothing Consultancy Limited | Wholesale & retail | 2021 |
| Bailey Consulting Group Ltd | Information & communication | 2022 |
| Bailey Garcha Ltd | Professional & scientific | 2014 |
| Bailey Property Midlands Ltd | Real estate | 2018 |
| Bailey Real Estate Ltd | Real estate | 2016 |