| Bayan Books Limited | Extraterritorial | 2015 |
| Bayleaf (Oxford) Limited | Hospitality | 2015 |
| Baylencroft Limited | Real estate | 1987 |
| Bayliss-Jones Properties Ltd | Real estate | 2025 |
| Bays International Limited | Wholesale & retail | 2012 |
| Bayswater Farm (Headington) Management Company Limited | Households | 2017 |
| BB Pizza (Oxford) Ltd | Hospitality | 2017 |
| BB Studio Ltd | Information & communication | 2025 |
| Bbga Association Limited | Other services | 1975 |
| BBM (Horton CUM Studley) Ltd | Financial services | 2014 |
| Bbrh Ltd | Extraterritorial | 2015 |
| Bbuona Ltd | Hospitality | 2019 |
| BC Tennis Ltd | Education | 2023 |
| Bcic Limited | Education | 2017 |
| BD Plumbing Ltd | Construction | 2017 |
| BE Eventful Ltd | Other services | 2017 |
| BE Software International Limited | Information & communication | 2013 |
| BE the Change. Media CIC | Education | 2025 |
| BE Useful AI Ltd | Information & communication | 2026 |
| BE With BE Ltd | Information & communication | 2026 |
| Beacon Property Capital LLP | | 2012 |
| Beaconsfield AV Limited | Manufacturing | 2009 |
| Beagle Education Ltd | Education | 2022 |
| Bearface Collective Ltd | Other services | 2025 |
| Beasley Elkes Limited | Real estate | 2003 |
| Beasley Ltd | Professional & scientific | 2014 |
| Beauchamp & Butler Plumbing & Heating Ltd | Construction | 2006 |
| Beaumont Capital LLP | | 2009 |
| Beaumont Court (Oxford) Management Company Limited | Real estate | 2004 |
| Beaumont Dental Care Limited | Health & social care | 2015 |
| Beaumont Design & Build Ltd | Construction | 2022 |
| Beaumont Developments Limited | Construction | 2015 |
| Beaumont Group UK Limited | Administrative & support | 2015 |
| Beaupierre Ltd | Manufacturing | 2019 |
| Beaupreau Aero Solutions Ltd | Professional & scientific | 2021 |
| Beautie Suite Ltd | Other services | 2024 |
| Beautiful Voice Limited | Professional & scientific | 2022 |
| Beauty Highlights Ltd | Other services | 2023 |
| Becaya Limited | Real estate | 1991 |
| Beck & Mendes Limited | Construction | 2014 |
| Beckley Psytech Limited | Wholesale & retail | 2018 |
| Beckley Waves Ltd | Professional & scientific | 2021 |
| Beckman Ltd | Manufacturing | 2019 |
| Bedful Limited | Information & communication | 2018 |
| Bedrock Geothermal Ltd | Professional & scientific | 2022 |
| Bedsnotboards Limited | Other services | 2015 |
| BEE Bizzi Ltd | Information & communication | 2019 |
| BEE Home Oxford Ltd | Real estate | 2025 |
| Beebann Contracts Limited | Construction | 2013 |
| Beecher Acoustics Limited | Manufacturing | 2007 |
| Beecher Lewis Limited | Real estate | 2020 |
| Beeches Farm Management Limited | Real estate | 2007 |
| Beechey Management Company Limited | Households | 2004 |
| Beehive Realty Ltd | Real estate | 2023 |
| Beem Advertising Ltd | Professional & scientific | 2024 |
| Beeutiful Bakery Limited | Wholesale & retail | 2018 |
| Beginners Mind Ltd | Professional & scientific | 2025 |
| Behavioural Change Trustees Limited | Professional & scientific | 2023 |
| Behcet's Patients Centres | Administrative & support | 2012 |
| Being Humankind Ltd | Information & communication | 2015 |
| Bekkali Hpb-Gastroenterology Ltd | Health & social care | 2025 |
| Belclere Limited | Manufacturing | 2024 |
| Belgarum Technology Holdings Limited | Financial services | 2017 |
| Bell Osborne Limited | Professional & scientific | 2003 |
| Bella Property Investments (London) Ltd | Construction | 2023 |
| Bella Property Solutions (London) Ltd | Professional & scientific | 2023 |
| Bellator Advisory Services Limited | Professional & scientific | 2026 |
| Bellatrix Limited | Extraterritorial | 1998 |
| Bellorra Ltd | Wholesale & retail | 2025 |
| Bellwood Homes Limited | Construction | 2002 |
| Belmont Barbers Oxford Limited | Other services | 2025 |
| Belmonte 2020 Limited | Real estate | 2020 |
| Belright Limited | Real estate | 2020 |
| Belstone Associates (Oxford) Limited | Professional & scientific | 2010 |
| BEN Iqra Ltd | Information & communication | 2024 |
| BEN Spiers Brickwork Limited | Construction | 2017 |
| BEN Webb Property Ltd | Real estate | 2021 |
| Ben's Botanicals Ltd | Wholesale & retail | 2025 |
| Ben-Adel Limited | Financial services | 2023 |
| Benediction Classics Limited | Information & communication | 2011 |
| Benfield & Loxley (Builders) Limited | Construction | 2011 |
| Benfield & Loxley EOT Limited | Extraterritorial | 2022 |
| Benjamin Clowes Fabrications Ltd | Manufacturing | 2017 |
| Bennellick Engineering Limited | Professional & scientific | 2013 |
| Benson Place Residents Association Limited | Households | 1966 |
| Benwell Construction Limited | Construction | 2019 |
| Beretand LLP | | 2022 |
| Bergenbio Limited | Professional & scientific | 2017 |
| Berghahn Books Limited | Information & communication | 1993 |
| Bergmann Ltd | Professional & scientific | 2012 |
| Berikauto Limited | Wholesale & retail | 2025 |
| Berkshire Design & Development Services Limited | Construction | 2015 |
| Bermondsey Wall Limited | Real estate | 2007 |
| Bermuda AAM Ltd | Real estate | 2022 |
| Bernard George Barsley Ltd | Professional & scientific | 2015 |
| Bernodyl Limited | Information & communication | 2023 |
| Bert Group Ltd | Professional & scientific | 2022 |
| Bertoli Mitchell LLP | | 2007 |
| Bertoli Mitchell Partners Limited | Professional & scientific | 2021 |
| Berville Limited | Administrative & support | 2008 |