| Ayelike Ltd | Information & communication | 2011 |
| Aytans Delli Limited | Hospitality | 2021 |
| AZ Properties Bolton Ltd | Real estate | 2019 |
| AZA Pharma Services Ltd | Health & social care | 2022 |
| Azaan Builders & Developers Ltd | Construction | 2024 |
| B & M Services | | 2009 |
| B Double E Ltd | Information & communication | 2018 |
| B Dwyer Limited | Real estate | 2022 |
| B M TEC Limited | Wholesale & retail | 2003 |
| B&B Osaah Ltd | Health & social care | 2024 |
| B&T and M Associates | | 1999 |
| B.E.E.S. Lease Management Limited | Real estate | 2023 |
| Baarad Barber Ltd | Other services | 2019 |
| BAD FUN Events Ltd | Arts & recreation | 2021 |
| Bagadi Properties Ltd | Real estate | 2024 |
| Bagule Valeting Centre Ltd | Other services | 2025 |
| Bahoo Limited | Health & social care | 2021 |
| Bailey Agile Solutions Limited | Information & communication | 2007 |
| Bailey Medics Ltd | Professional & scientific | 2024 |
| Baileys Cleaning Limited | Administrative & support | 2010 |
| Balaji Techbuild PVT Ltd | Construction | 2022 |
| Ball & Barrow Ltd | Real estate | 2025 |
| Balmane Group Ltd | Construction | 2021 |
| Balmane Group PV Solar Division Limited | Construction | 2025 |
| Balmo Ltd | Information & communication | 2018 |
| Balshogb Ltd | Real estate | 2023 |
| Baltic Blue Limited | Information & communication | 2006 |
| BAM & ROB Props Limited | Real estate | 2020 |
| BAM Takeaway Ltd | Hospitality | 2025 |
| Bamboo Legal (UK) Limited | Professional & scientific | 2024 |
| Banana Deals Ltd | Wholesale & retail | 2019 |
| Bancroft Mews Management Company Limited | Households | 2002 |
| Bange Nursing Homes Limited | Health & social care | 2007 |
| Bannister Preston Solicitors LLP | | 2017 |
| Bapr Ltd | Other services | 2025 |
| Barbera Limited | Extraterritorial | 2017 |
| Barberdan Ltd | Other services | 2019 |
| Barcor Limited | Real estate | 1998 |
| Barlow Flats Ltd | Hospitality | 2020 |
| Barlow Moor Property Management Limited | Real estate | 2002 |
| Barnes Residential Properties Limited | Real estate | 2000 |
| Barnetts of Salemoor Ltd | Administrative & support | 2012 |
| Barrette Limited | Professional & scientific | 2008 |
| Barrie Wilson Joinery Limited | Construction | 2003 |
| Barton Brook Ltd | Construction | 2021 |
| Basil ST Properties Ltd | Financial services | 2021 |
| Bauhaus Barber Ltd | Other services | 2019 |
| BAW Medical Ltd | Health & social care | 2011 |
| Bawa & Sons Properties Ltd | Real estate | 2018 |
| Bayliss Commercial Limited | Professional & scientific | 2025 |
| BBB Resources Ltd | Financial services | 2024 |
| BBB Solutions Limited | Professional & scientific | 2018 |
| BBQ HQ Limited | Hospitality | 2025 |
| BBQ Property Limited | Financial services | 2024 |
| BC Aviation Services Ltd | Manufacturing | 2022 |
| BCM GRC Limited | Manufacturing | 1985 |
| BD Project Controls Ltd | Information & communication | 2020 |
| BD Short Stays Ltd | Real estate | 2023 |
| BDI Structural Solutions (Midlands) Ltd | Professional & scientific | 2024 |
| BDI Structural Solutions Ltd | Professional & scientific | 2010 |
| BE at Home MCR Ltd | Real estate | 2023 |
| BE Sweet Limited | Wholesale & retail | 2017 |
| Bean & Brush Limited | Arts & recreation | 2014 |
| Bear Behind the Birch Limited | Information & communication | 2024 |
| Beatrice Omoikhoba Health Care Services Ltd | Health & social care | 2022 |
| Beauty Demands Ltd | Wholesale & retail | 2025 |
| BEC Controls Group Limited | Information & communication | 2014 |
| BEE & ZAI Ltd | Wholesale & retail | 2025 |
| BEE Authentic Ltd | Professional & scientific | 2025 |
| Beech's Gardens Ltd | Administrative & support | 2020 |
| Beechlands Investments Limited | Professional & scientific | 2023 |
| Beeconcepts Ltd | Information & communication | 2011 |
| Beehive Property Solutions Ltd | Real estate | 2016 |
| Beehive Risk Solutions Ltd | Financial services | 2025 |
| Beeston Limited | Health & social care | 2016 |
| Bekind Care Consultancy Limited | Health & social care | 2024 |
| Bekind Care Limited | Health & social care | 2021 |
| Bekind Retreat Limited | Administrative & support | 2026 |
| Bekind Shared Services Limited | Administrative & support | 2026 |
| Belarin Limited | Real estate | 2025 |
| Believe Learning Institute Limited | Education | 2013 |
| Bell Fitness Ltd | Arts & recreation | 2013 |
| Belleview Medical Limited | Health & social care | 2024 |
| Bells & Balloons Limited | Wholesale & retail | 2025 |
| Bellyshed Ltd | Manufacturing | 2024 |
| Belotel Limited | Real estate | 1983 |
| BEN Cadwallader Limited | Information & communication | 2010 |
| BEN Currie Limited | Arts & recreation | 2020 |
| Bennetts Reclaimed Building Materials Ltd | Wholesale & retail | 2000 |
| Bentley Designs & Projects Ltd | Professional & scientific | 2024 |
| Bentley Hurst (Hale) Limited | Real estate | 2025 |
| Bentley Hurst Limited | Real estate | 2020 |
| Bentley Tube Ltd | Administrative & support | 2014 |
| Benton House Property Limited | Financial services | 2017 |
| Berrys Court Management Limited | Real estate | 2000 |
| Berts Bakery Limited | Manufacturing | 2023 |
| Bespoke Bids Consultancy Limited | Professional & scientific | 2015 |
| Bespoke Cover Limited | Transport & logistics | 2019 |
| Best Dental Limited | Health & social care | 2015 |
| Best Value Homes Ltd | Extraterritorial | 2022 |