| Bartonhurst Construction Ltd | Construction | 2023 |
| Barwood Adderbury Management Company Limited | Households | 2016 |
| Basesound Services Limited | Financial services | 1993 |
| Bassets Property Services Ltd | Real estate | 2004 |
| Bassett Maritime Limited | Transport & logistics | 2021 |
| Baswich Grange Management Company Limited | Households | 2018 |
| Batcave Development Ltd | Construction | 2018 |
| Bath Electrics Limited | Manufacturing | 2017 |
| Bath Pizza Limited | Administrative & support | 2004 |
| Batm Scaffolding Ltd | Construction | 2015 |
| Bats Paranormal Ltd | Administrative & support | 2025 |
| Batt Broadbent Limited | Professional & scientific | 2024 |
| Batt Broadbent Solicitors LLP | | 2012 |
| Bavc Ltd | Wholesale & retail | 2024 |
| Bawden Contracting Services Limited | Administrative & support | 1990 |
| Bawdstone Holdings Limited | Professional & scientific | 2015 |
| Baxter Green Architects Limited | Professional & scientific | 2013 |
| Baxters Estates Ltd | Real estate | 2011 |
| Bayford Associates Ltd | Professional & scientific | 2001 |
| Bayford Rendell Ltd | Professional & scientific | 2006 |
| Baysfield Recruitment Ltd | Administrative & support | 2022 |
| Bayswater Fields (Barton) Management Company Limited | Households | 2016 |
| Bayview Apartments (Machynys) Ltd | Households | 2018 |
| Bayview Books Limited | Arts & recreation | 2017 |
| Bbfa Ltd | Administrative & support | 2009 |
| Bbrs Limited | Wholesale & retail | 2002 |
| Bbsystems Ltd | Information & communication | 2021 |
| BCA Property Ltd | Real estate | 2026 |
| Bcam Properties Ltd | Real estate | 2023 |
| BCM Enterprises Limited | Wholesale & retail | 2025 |
| BCS Tattoos Limited | Arts & recreation | 2024 |
| BDC02 Ltd | Real estate | 2020 |
| Bduk Services Ltd | Construction | 2023 |
| BE Gone Group Ltd | Administrative & support | 2025 |
| Beacon Hill Land Limited | Agriculture & fishing | 2010 |
| Beacon PM Ltd. | Information & communication | 2016 |
| Beale & Combes Ltd | Real estate | 2026 |
| Beamer Limited | Manufacturing | 1998 |
| Beamerton Heath Store Ltd | Wholesale & retail | 2022 |
| Beas Consulting Limited | Information & communication | 2017 |
| Beau's Hair Ltd. | Other services | 2011 |
| Beaudesert Limited | Wholesale & retail | 1997 |
| Beaumont Park (Blandford) Management Company Limited | Households | 2012 |
| Beautiful Bodies Limited | Other services | 2021 |
| Beauty Dinners Ltd | Administrative & support | 2024 |
| Beauty One Laser Limited | Arts & recreation | 2016 |
| Beauty Product Development Limited | Professional & scientific | 2021 |
| Beautyful Bodies Ltd | Other services | 2019 |
| Beckford Arms Ltd | Hospitality | 2009 |
| Beckford Corsham Ltd | Wholesale & retail | 2025 |
| Beckford Group Ltd. | Hospitality | 2009 |
| Beckles Properties Limited | Real estate | 2021 |
| Bedazzled Lawn Care Ltd | Administrative & support | 2019 |
| Bedfont Gate (Blocks R, S & T) Management Company Limited | Households | 1997 |
| Bedfont Gate (Blocks Y,Z, 1 & 2) Management Company Limited | Households | 1995 |
| Bedford Court Residents Management Company Limited | Households | 2013 |
| Bedgebury Place Management Company Limited | Households | 2014 |
| Bediide African & Caribbean Food Ltd | Hospitality | 2021 |
| Bedin 1 Limited | Professional & scientific | 2019 |
| Bednbake Limited | Manufacturing | 2021 |
| Beechcroft (Sunninghill) Management Company Limited | Households | 2012 |
| Beechwood (Block D) Management Company Limited | Households | 1990 |
| Beechwood (Block G) Management Company Limited | Households | 1990 |
| Beechwood (Block H) Management Company Limited | Households | 1990 |
| Beetlebrow Limited | Information & communication | 2000 |
| Beia Capital Limited | Financial services | 2009 |
| Beingheard Limited | Professional & scientific | 2024 |
| Belcourt Programme Solutions Ltd | Professional & scientific | 2014 |
| Belgarum Developments Ltd | Construction | 2003 |
| Belgarum Medical Limited | Health & social care | 2019 |
| Belgrave Court (Cheltenham) Management Company Limited | Households | 2009 |
| Belgrave Place (Minster-On-Sea) Management Company Limited | Households | 2021 |
| Belgrave Terrace Management Limited | Households | 2014 |
| Belknap Livery Limited | Administrative & support | 2003 |
| Belle Memphis Limited | Administrative & support | 2020 |
| Bellorama Wiltshire Ltd | Hospitality | 2020 |
| Bellringing Courses Limited | Arts & recreation | 2007 |
| Bellway at Rosewood Management Company Limited | Real estate | 2023 |
| Belmont Fine Arts Ltd | Arts & recreation | 2022 |
| Belmont Park (Maidenhead) Management Company Limited | Households | 2022 |
| Bembridge Farm Limited | Agriculture & fishing | 2014 |
| Bemerton Community Limited | Real estate | 2009 |
| BEN Coleman Limited | Administrative & support | 2019 |
| BEN Dolbear Farming Ltd | Agriculture & fishing | 2025 |
| BEN Eveling Consulting Limited | Information & communication | 2014 |
| BEN Gater Electrical Ltd | Construction | 2021 |
| BEN Hall Carpentry Limited | Manufacturing | 2024 |
| BEN Maton Limited | Arts & recreation | 2024 |
| BEN Smith Consultancy Limited | Information & communication | 2021 |
| Ben's Limited | Other services | 2023 |
| Benchmark Development Planning Limited | Professional & scientific | 2011 |
| Benfield Management Consulting Services Ltd | Professional & scientific | 2013 |
| Bennett & Dean (Salisbury) Limited | Construction | 2009 |
| Bennett HR Consulting Ltd | Professional & scientific | 2023 |
| Bennetts Electrical Services Limited | Energy | 2015 |
| Benson Ingram Law LLP | | 2011 |
| Benss UK Limited | Administrative & support | 2016 |
| Bentley Place (Hammersmith) Management Company Limited | Households | 2016 |
| Bentley's Frenchmoor Ltd | Hospitality | 2017 |
| Bepharma Ltd | Professional & scientific | 2012 |