| Axone Technologies UK Limited | Information & communication | 2018 |
| Axone Training Solutions UK Limited | Information & communication | 2021 |
| Axora Software Limited | Information & communication | 2025 |
| Aycom Limited | Information & communication | 2022 |
| Ayge Limited | Information & communication | 2012 |
| Ayra Freshmart Ltd | Wholesale & retail | 2025 |
| Azbo Consultancy Limited | Information & communication | 2013 |
| Azee Platinum Services Limited | Financial services | 2024 |
| Azel IT Solutions PVT Ltd | Information & communication | 2022 |
| Azimuth Motors Holdings Ltd. | Wholesale & retail | 2015 |
| Azrael Enterprises Ltd | Other services | 2021 |
| Aztech Microcentres Limited | Information & communication | 1987 |
| B & E Management Ltd | Real estate | 2025 |
| B Social Media Limited | Professional & scientific | 2025 |
| B&M Hospitality Ltd | Hospitality | 2020 |
| B.M.R. (Wokingham) Management Company Limited | Households | 1999 |
| B.Shehu Brickwork Ltd | Construction | 2016 |
| B18 Partners Ltd | Professional & scientific | 2025 |
| B2B Utilites Ltd | Energy | 2019 |
| Baah Healthcare Limited | Health & social care | 2019 |
| Babbage Way RTM Company Limited | Real estate | 2005 |
| Babeth Taxi Ltd | Financial services | 2020 |
| Baby Sensory Woking Limited | Education | 2018 |
| Bacall Aluminium Limited | Manufacturing | 2022 |
| BACK2NORMAL Chiro Ltd | Health & social care | 2021 |
| Background Noise Productions Ltd. | Information & communication | 2013 |
| BAD Back Barney Ltd | Other services | 2024 |
| Badminton House and Rectory Court Freehold Company Ltd | Professional & scientific | 2016 |
| Badminton House Management Company Limited | Households | 1974 |
| Bagaras Catering Limited | Hospitality | 2023 |
| Baileys Coaches Limited | Transport & logistics | 1995 |
| Bakes Made Easy Ltd | Manufacturing | 2024 |
| Bakour Limited | Wholesale & retail | 2010 |
| Baloo Nails & Beauty Limited | Other services | 2016 |
| Balshagray Consulting Ltd | Real estate | 2025 |
| Balwest Ltd | Construction | 2023 |
| BAM Construction Training Ltd | Education | 2013 |
| Bannister Consulting Ltd | Professional & scientific | 2022 |
| Baradi Systems Ltd | Professional & scientific | 2025 |
| Barbara Anne Bradbury Ltd | Extraterritorial | 2024 |
| Barbary Group Limited | Wholesale & retail | 2024 |
| Bard Tutoring Ltd | Extraterritorial | 2013 |
| Bare Bone Distribution Limited | Wholesale & retail | 2018 |
| Barespirit Ltd | Health & social care | 2020 |
| Barfield Meadows Developments Ltd | Construction | 2017 |
| Barjo Cages and Guards Limited | Manufacturing | 2000 |
| Barkham Brickwork Ltd | Construction | 2023 |
| Barkham Hill Interiors Limited | Manufacturing | 2018 |
| Barkham Management Company Limited | Households | 2006 |
| Barkham Manor Management Limited | Real estate | 1992 |
| Barkham Village Store Ltd | Wholesale & retail | 2013 |
| Barkhart Property Limited | Real estate | 2025 |
| Barley Mead (Calcot) Management Company (1) Limited | Households | 1985 |
| Barloch Control Systems Limited | Manufacturing | 1975 |
| Barnstorm Global Limited | Professional & scientific | 2017 |
| Baron Consultancy Services Limited | Information & communication | 2013 |
| Baronswater Leisure Limited | Professional & scientific | 2018 |
| Barot Medical Ltd | Health & social care | 2022 |
| Barstone Holdings Limited | Professional & scientific | 2022 |
| Bartlett Industrial Holdings Limited | Real estate | 1965 |
| Bascomb & Drew Ltd. | Construction | 2000 |
| Basemedia Limited | Information & communication | 2004 |
| Basketballers Limited | Arts & recreation | 2025 |
| Bastom Group Accounting Limited | Professional & scientific | 2026 |
| Bathroom Concepts Wokingham Ltd | Construction | 2019 |
| Bathrooms & Beyond Limited | Construction | 2022 |
| Batta Medical Services Limited | Health & social care | 2012 |
| Batty's Barn Freehold Limited | Households | 2013 |
| BB Primrose Ltd | Real estate | 2021 |
| BBS Eurotracks Ltd | Arts & recreation | 2009 |
| BC Manufacturing Ltd | Manufacturing | 2025 |
| BC Softwear Holdings Limited | Wholesale & retail | 2018 |
| BC Softwear Limited | Wholesale & retail | 2001 |
| BCM Scientific Ltd | Professional & scientific | 2023 |
| BDE Coaching Ltd | Professional & scientific | 2023 |
| BDG Ventures Ltd | Information & communication | 2026 |
| Beacon Agency Ltd | Professional & scientific | 2018 |
| Beakster Consulting Limited | Information & communication | 2025 |
| BEANIES4U Ltd | Wholesale & retail | 2024 |
| Bears Packhouse Ltd | Hospitality | 2016 |
| Bearwood Brewing Ltd | Manufacturing | 2024 |
| Bearwood Business Services Limited | Administrative & support | 2021 |
| Bearwood Consultants Limited | Information & communication | 2011 |
| Bearwood Lakes Golf Club Limited | Arts & recreation | 1994 |
| Bearwood Recruitment Limited | Administrative & support | 2016 |
| Beauty by Bharti Limited | Other services | 2026 |
| Beauvoir Place Management Company (Reading) Limited | Households | 1989 |
| Beaverswood Supply Co. Limited | Manufacturing | 1984 |
| Beck Contracts Limited | Administrative & support | 2020 |
| Beckingham Metro Management Company Limited | Households | 2010 |
| BECREAT1VE Limited | Information & communication | 2022 |
| Becs Electrical Limited | Construction | 2024 |
| Becs Fit-Out UK Limited | Construction | 2020 |
| Becs Hire Ltd | Construction | 2018 |
| Becton Dickinson (CME) U.K. Limited | Wholesale & retail | 2001 |
| Becton Dickinson Dispensing UK Ltd | Manufacturing | 1993 |
| Becton Dickinson Infusion Therapy Holdings UK Limited | Administrative & support | 1998 |
| Becton Dickinson Infusion Therapy UK | Manufacturing | 1954 |
| Becton, Dickinson U.K. Limited | Manufacturing | 1965 |
| Bedmar Construction Limited | Construction | 2007 |