| Awkward Works Limited | Professional & scientific | 2019 |
| AYA & Partners Ltd | Professional & scientific | 2022 |
| Ayers Rigging Limited | Construction | 2025 |
| Aylesford Coventry Limited | Health & social care | 2015 |
| Ayres Construction Ltd | Construction | 2025 |
| Azara Gardens Limited | Administrative & support | 2015 |
| Aztute Limited | Real estate | 2011 |
| B R B Property Services Limited | Administrative & support | 2004 |
| B.D. Townsend Limited | Real estate | 1979 |
| B.W.R. Limited | Households | 1984 |
| B2 Hi-Tech Ltd. | Professional & scientific | 2012 |
| B5 Consulting Ltd | Real estate | 2022 |
| B7 Customs Ltd | Wholesale & retail | 2025 |
| Bakisheva LLP | | 2019 |
| Balford Travel Limited | Administrative & support | 2019 |
| Bambino Tots Soft Play Ltd | Administrative & support | 2023 |
| Bamboo Full Stop Limited | Professional & scientific | 2025 |
| Bankrupt Ltd | Professional & scientific | 2026 |
| Bar Graphic Machinery Limited | Manufacturing | 2004 |
| Bastion Alarms Ltd | Administrative & support | 2025 |
| Bates-Enstone Homes Ltd | Real estate | 2023 |
| Batson and Perry Limited | Real estate | 2024 |
| BCE Partners UK Ltd | Professional & scientific | 2021 |
| Beacon Lofts and Extensions Limited | Extraterritorial | 2012 |
| Beacon Project Management Limited | Professional & scientific | 2012 |
| Bean Enterprises Ltd | Professional & scientific | 2024 |
| Bearleaf Services Limited | Agriculture & fishing | 2015 |
| Beaumonde Homes (Orchard Way) Limited | Construction | 2000 |
| Beaumonde Homes (Residential) Limited | Real estate | 2004 |
| Beaumonde Homes (Rowtown) Limited | Real estate | 2016 |
| Beautiful Movements Limited | Administrative & support | 2012 |
| Beckfords Limited | Hospitality | 1999 |
| Beechcroft Manor Management Limited | Real estate | 1985 |
| Beef King Addlestone Ltd | Hospitality | 2023 |
| Beehive Advisory Ltd | Professional & scientific | 2021 |
| BEL Aire Ltd | Manufacturing | 2022 |
| Bellbeau Properties Ltd | Real estate | 2026 |
| Belmont Grove Management Company Limited | Households | 1964 |
| Benack Consulting Ltd | Professional & scientific | 2016 |
| Bennett Business Partnerships Limited | Public administration | 2022 |
| Beracah Valley Limited | Real estate | 2021 |
| Berkeley Hand Carwash Limited | Other services | 2014 |
| Best Option Solutions Ltd | Professional & scientific | 2013 |
| Bevington Finch Limited | Information & communication | 2026 |
| Bidmedia Broadcasting Limited | Administrative & support | 2009 |
| Bidmedia Limited | Information & communication | 2005 |
| Binding and Presentation Supplies Limited | Extraterritorial | 1985 |
| BIP Industries Limited | Financial services | 2001 |
| Birdies Beautique Ltd | Information & communication | 2015 |
| Bishops Table Management Limited | Real estate | 2023 |
| Bkande Limited | Health & social care | 2020 |
| BKS PUB Company Limited | Hospitality | 2015 |
| Blackbox Solutions Limited | Information & communication | 2005 |
| Blazing Saddles Bike Hire Limited | Administrative & support | 2021 |
| Blazing Saddles Bikes Limited | Administrative & support | 2019 |
| Blooming Marvellous TV & Film Rigging Ltd | Construction | 2018 |
| Blou Scenic Ltd | Information & communication | 2014 |
| Blue FOX Lettings Ltd | Real estate | 2023 |
| Blue Highway Services Limited | Professional & scientific | 2006 |
| Blue Squirrel Developments Ltd | Real estate | 2015 |
| Bluebell Funding UK Ltd | Financial services | 2020 |
| Bluebell Way (Curbridge) Management Company Limited | Households | 2024 |
| Blueskies Trading Limited | Wholesale & retail | 2013 |
| Bluestreak Performance Limited | Professional & scientific | 2023 |
| Bluewater Estates Limited | Administrative & support | 1999 |
| Bluewireelectrical Ltd | Construction | 2013 |
| Blurthelines Investments Limited | Real estate | 2018 |
| Blurthelines Limited | Administrative & support | 2003 |
| Bodim Ltd | Construction | 2021 |
| Bodylab Aesthetics Ltd | Other services | 2020 |
| Bomit Ltd | Wholesale & retail | 2023 |
| Bonmoja Limited | Information & communication | 2018 |
| Bonmoja Services Ltd | Information & communication | 2018 |
| Bonmoja Technology Limited | Information & communication | 2018 |
| Bonview Property Ltd | Real estate | 2026 |
| Bopepa Limited | Arts & recreation | 2014 |
| Bose Consultancy Limited | Professional & scientific | 2013 |
| Boss Powerboats Ltd | Manufacturing | 2009 |
| Bosworth Aviation Consultancy Limited | Professional & scientific | 2007 |
| Boundary Talent International Limited | Administrative & support | 2018 |
| Braejuan Limited | Information & communication | 2020 |
| Brainchild Development Limited | Education | 2015 |
| Brambles Enterprises Limited | Professional & scientific | 1988 |
| Brambles Finance PLC | Financial services | 2002 |
| Brambles Holdings (UK) Limited | Professional & scientific | 2001 |
| Brambles Investment Ltd. | Financial services | 2006 |
| Brambles Nominees Limited | Financial services | 2003 |
| Brambles U.K. Limited | Financial services | 1980 |
| Brambles Ventures Limited | Financial services | 2026 |
| Brand Salience Limited | Professional & scientific | 2010 |
| Brantwood Estate Management Company Limited | Households | 1982 |
| Bravewords Records Limited | Manufacturing | 2023 |
| Braywood Advisory Ltd | Professional & scientific | 1998 |
| Brdm Limited | Construction | 2024 |
| Brentwood Court Residents (Addlestone) Limited | Households | 1994 |
| BRI8 Limited | Information & communication | 2018 |
| Bridgee Ltd | Wholesale & retail | 2025 |
| Bridgnorth Edge (Bridgnorth) Management Company Limited | Households | 2025 |
| Bright Washrooms Ltd | Wholesale & retail | 2009 |
| Brightwells Residential 1 Company Limited | Households | 2006 |