| Avase Ltd | Administrative & support | 2017 |
| Avenue Heights Management Company Limited | Households | 2002 |
| Aviation Baggage Solutions Ltd | Manufacturing | 2019 |
| Aviator Place Management Company Limited | Households | 2008 |
| Avior Management Company Limited | Households | 2006 |
| Avitera Ltd | Professional & scientific | 2022 |
| AVL Boilers Ltd | Construction | 2025 |
| Away Team Software Limited | Information & communication | 2013 |
| B&N Renovations Ltd | Construction | 2024 |
| B.Rap Scaffolding Limited | Construction | 2025 |
| BA Clubs Limited | Arts & recreation | 2006 |
| Balders Trading Limited | Administrative & support | 2010 |
| Ballin London Limited | Wholesale & retail | 2019 |
| Balltron Limited | Financial services | 1999 |
| Balvan Limited | Wholesale & retail | 2019 |
| Banana Head Ltd | Wholesale & retail | 2016 |
| Bangor Chiropractic Ltd | Health & social care | 2011 |
| Barbers in Crowthorne Ltd | Other services | 2022 |
| Barich Limited | Wholesale & retail | 2011 |
| Barone Consultancy Limited | Information & communication | 1995 |
| Barracane Residents Association Limited | Households | 1987 |
| Bascule Scientific Limited | Information & communication | 1997 |
| BASKETBALL4ALL | Arts & recreation | 2009 |
| Bastion Rock Limited | Information & communication | 2015 |
| Bath Road Residents Limited | Households | 1996 |
| BB Food & Wine Ltd | Wholesale & retail | 2014 |
| Beattie Electrical Ltd | Construction | 2012 |
| Beaulieu Gardens Management (Blackwater) Limited | Households | 1976 |
| Becca’S House Day Nursery Limited | Health & social care | 2025 |
| Becker Events Ltd | Administrative & support | 2022 |
| BEE Three Zero Ltd | Arts & recreation | 2017 |
| Belgrave Homes Limited | Construction | 2013 |
| Bell Court (Maidenhead) Limited | Households | 2007 |
| BEN Williams Consultancy Ltd | Construction | 2019 |
| Beresford Copier Supplies Limited | Administrative & support | 2009 |
| Berkshire County & Co Ltd | Real estate | 2024 |
| Berkshire EYE VET Ltd | Professional & scientific | 2024 |
| Berkshire Kitchen Design Limited | Construction | 2014 |
| Berkshire Property Maintenance Limited | Construction | 2004 |
| Berkshire Windows and Doors Limited | Construction | 2024 |
| Bespoke IFA Ltd | Financial services | 2019 |
| Bespoke Independent Financial Advisers Limited | Financial services | 2013 |
| Bessant Translation Ltd | Professional & scientific | 2022 |
| Bessertrim Limited | Wholesale & retail | 2002 |
| Best Start Recruitment Ltd | Administrative & support | 2018 |
| Beta House Residents Association Limited | Households | 1960 |
| Bexatron Ltd | Information & communication | 2025 |
| Bida Consulting Ltd | Professional & scientific | 2025 |
| Bifold World Limited | Administrative & support | 2025 |
| Binary Corporation Limited | Professional & scientific | 2016 |
| Binklay (UK) Limited | Construction | 2010 |
| Birch Court(Crowthorne)Limited | Households | 1966 |
| Bishopsgate Asset Management Limited | Hospitality | 1998 |
| Black Start Media and Events Limited | Administrative & support | 2016 |
| Blackheath Blooms Limited | Wholesale & retail | 2026 |
| BLF Oils Limited | Wholesale & retail | 2010 |
| Blinds and Awnings UK Ltd | Wholesale & retail | 2018 |
| Blomma Limited | Professional & scientific | 2017 |
| Blsx PVT. Ltd | Manufacturing | 2022 |
| Blue Grass Software Ltd | Professional & scientific | 2020 |
| Bluegranite Property B LLP | | 2025 |
| Boathouse Developments Limited | Real estate | 2001 |
| Bodieves Limited | Professional & scientific | 2019 |
| Bonhomie Court (Hurst) Freehold Limited | Extraterritorial | 2009 |
| Bonhomie Court (Hurst) Management Company Limited | Households | 2002 |
| Boogaloo Promotions Limited | Arts & recreation | 2003 |
| Boomboom BH Ltd | Wholesale & retail | 2023 |
| Boreroom LLP | | 2009 |
| Boswood and Hendry Limited | Wholesale & retail | 1961 |
| Bourne Bespoke Ltd | Construction | 2020 |
| Box Bear Digital Limited | Information & communication | 2015 |
| Box Bear Limited | Information & communication | 2018 |
| Box One Couriers Ltd | Transport & logistics | 2025 |
| Boxford Ridge Management Limited | Households | 1987 |
| Bracken Grange Management Company Limited | Real estate | 2011 |
| Bracknell Plumbing & Heating LLP | | 2011 |
| Bradbury Edwards Limited | Wholesale & retail | 2014 |
| Breathe Cashflow Limited | Professional & scientific | 2014 |
| Breathe Performance Ltd | Professional & scientific | 2021 |
| Bright Oasis Homes INV Limited | Real estate | 2024 |
| Bright Oasis Homes Limited | Real estate | 2024 |
| Bright Oasis Homes M Limited | Real estate | 2024 |
| Bright Oasis Homes P Limited | Real estate | 2024 |
| Britannia Building and Masonry Ltd | Construction | 2024 |
| British Cheerleading Association | Arts & recreation | 2004 |
| Brittain Court (Berkshire) Management Limited | Households | 1981 |
| Brittain Court (Sandhurst) Management Limited | Households | 1980 |
| Bruce's Barbarista Ltd | Professional & scientific | 2019 |
| Brunanburh Ltd | Professional & scientific | 2023 |
| Bucklers Trading Ltd | Wholesale & retail | 2021 |
| BUD Marketing Limited | Wholesale & retail | 2014 |
| Build IT Brothers Ltd | Construction | 2019 |
| Build Strategy Limited | Construction | 2022 |
| Bump Birth and Babies Limited | Education | 2013 |
| Burton IT Limited | Information & communication | 2026 |
| BUS Services Ltd | Wholesale & retail | 2017 |
| Bushnell Place Management Company Limited | Households | 2008 |
| Butterfly Products UK Limited | Wholesale & retail | 2022 |
| Caden Leathem Limited | Health & social care | 2010 |
| Cain Design Limited | Wholesale & retail | 2026 |