| Bath Symphony Orchestra Productions Ltd | Arts & recreation | 2018 |
| Bath T&F Ltd | Wholesale & retail | 2023 |
| Bath Tennis Services Ltd | Arts & recreation | 2012 |
| Bath Therapy and Counselling Limited | Health & social care | 2025 |
| Bath Transfers and Tours Limited | Transport & logistics | 2018 |
| Bath Tutorial College LLP | | 2018 |
| Bath Unit for Research in Paediatrics | Health & social care | 1997 |
| Bath Unlimited CIC | Information & communication | 2022 |
| Bath Utilities Services Limited | Administrative & support | 2020 |
| Bath Veterinary Centre Limited | Professional & scientific | 2006 |
| Bath Vintage and Costume Jewellery Ltd | Wholesale & retail | 2026 |
| Bath Vintage Ltd | Wholesale & retail | 2022 |
| Bath Walking Tours Limited | Administrative & support | 2022 |
| Bath Washco Ltd | Other services | 2022 |
| Bath Waste Ltd | Water & waste | 2021 |
| Bath Web Design Ltd | Information & communication | 2024 |
| Bath Wi-Fi Limited | Information & communication | 2019 |
| Bath Wills Limited | Professional & scientific | 2016 |
| Bath Window Cleaners Limited | Administrative & support | 2013 |
| Bath Woodburners Limited | Construction | 2014 |
| Bathbristoltcg Ltd | Wholesale & retail | 2026 |
| Bathcityelectrical Ltd | Construction | 2024 |
| Bathcube Ltd | Professional & scientific | 2010 |
| Batheaston New Village Hall | Arts & recreation | 2010 |
| Bathfitfam Ltd | Arts & recreation | 2020 |
| Bathford Joinery Limited | Manufacturing | 2021 |
| Bathlettings Ltd | Real estate | 2016 |
| Bathroom & Kitchen Solutions (South West) Limited | Construction | 2015 |
| Bathrooms at NO 5 Limited | Wholesale & retail | 2009 |
| Baths Green Gardens Ltd | Construction | 2016 |
| Bathsat Limited | Information & communication | 2007 |
| Bathsnackbar Ltd | Hospitality | 2024 |
| Bathsparklecleaning Limited | Administrative & support | 2014 |
| Bathwick Electrical Design Limited | Information & communication | 2007 |
| Bathwick Estates Limited | Households | 2020 |
| Bathwick Hill Publishing LLP | | 2018 |
| Bathwick Street Owners Group Freehold Limited | Households | 2020 |
| Bathwick Street Owners Group RTM Company Limited | Households | 2019 |
| Bathwick Tower Management Limited | Extraterritorial | 2000 |
| Bathwick Vista Limited | Real estate | 2020 |
| Batterham Matthews Design Limited | Professional & scientific | 1999 |
| Batterham Smith Architects Limited | Professional & scientific | 2017 |
| Batters Consultancy Ltd | Other services | 2020 |
| Battersea House Ltd | Education | 2022 |
| Battersea Park Properties Ltd | Real estate | 2019 |
| Battlefields Management Company Limited | Households | 1977 |
| Baudelaire Aesthetics Ltd | Other services | 2022 |
| Baumann Works Ltd | Real estate | 2023 |
| Bavan Properties Ltd | Real estate | 2025 |
| Baxter Noble Associates Limited | Construction | 2016 |
| Bay Tree Bath Limited | Real estate | 2025 |
| Bay Tree Energy Limited | Professional & scientific | 2015 |
| Bayaa Goods Ltd | Wholesale & retail | 2021 |
| BB3 Projects Ltd | Professional & scientific | 2016 |
| BBA Architects Ltd | Professional & scientific | 1992 |
| BBB Eight Ltd | Hospitality | 2021 |
| BBH (Bath) Limited | Real estate | 2019 |
| BC Tech Solutions Ltd | Professional & scientific | 2023 |
| Bcaf Limited | Administrative & support | 2024 |
| BCC (South West) Limited | Wholesale & retail | 2020 |
| Bcjw Limited | Financial services | 2024 |
| Bcpc | Education | 1999 |
| BCS Investors Limited | Financial services | 2019 |
| BD Micropubs Limited | Hospitality | 2016 |
| BD Synergy Ltd | Administrative & support | 2024 |
| BDB Property Ltd | Real estate | 2016 |
| BE More Girl Limited | Information & communication | 2016 |
| BE Then DO Ltd | Education | 2004 |
| Beachball Limited | Financial services | 2021 |
| Beachcroft TGH Ltd | Hospitality | 2022 |
| Beachrock (Consultancy) Limited | Real estate | 2020 |
| Beachrock Candle Ltd | Real estate | 2024 |
| Beachrock Limited | Real estate | 2020 |
| Beam Consult Limited | Professional & scientific | 2026 |
| Beamforth Limited | | 1985 |
| Bear Flat Cricket Club Limited | Arts & recreation | 2017 |
| Bear Flat Media Limited | Information & communication | 2017 |
| Bear Grills Counter Limited | Arts & recreation | 2017 |
| Bear Hill Studios Ltd | Administrative & support | 2025 |
| Bearcat Operations Limited | Mining & quarrying | 2021 |
| Beardmore Urban Limited | Professional & scientific | 2012 |
| Beasant & Co Ltd | Construction | 2021 |
| Beats Dance Ltd | Arts & recreation | 2020 |
| Beattie House One Limited | Real estate | 2020 |
| Beattie House Three Limited | Real estate | 2021 |
| Beattie House Two Limited | Real estate | 2020 |
| Beau Duggan Auto Services Ltd. | Wholesale & retail | 2020 |
| Beau Nash Decorative Ltd | Wholesale & retail | 2021 |
| Beaubelle Events Limited | Arts & recreation | 2016 |
| Beaucoup AI Ltd | Information & communication | 2024 |
| Beauford Forge Limited | Real estate | 2023 |
| Beaufort Maintenance Limited | Manufacturing | 2005 |
| Beaufort Montague Harris Limited | Professional & scientific | 2019 |
| Beaufort West Ltd | Professional & scientific | 2021 |
| Beaumont Collection Limited | Real estate | 2025 |
| Beaumont Maintenance Limited | Households | 1978 |
| Beauty & Soul Ltd | Other services | 2022 |
| Beckford Gardens CIC | Health & social care | 2026 |
| Beckford House (Bath) Management Company Ltd | Households | 2012 |
| Beckfords Gate Limited | Construction | 2015 |