| Bicester Cars (UK) Ltd | Administrative & support | 2017 |
| Bicester Commercial Garages Limited | Wholesale & retail | 1978 |
| Bicester Commercial Maintenance Limited | Construction | 2024 |
| Bicester Darts Ltd | Wholesale & retail | 2025 |
| Bicester Developments Ltd | Real estate | 2019 |
| Bicester Eatery Ltd | Extraterritorial | 2018 |
| Bicester Flame Ltd | Hospitality | 2025 |
| Bicester Glass Collection Ltd | Water & waste | 2024 |
| Bicester Glow Clinic Ltd | Other services | 2020 |
| Bicester Green | Professional & scientific | 2012 |
| Bicester Grill Limited | Hospitality | 2025 |
| Bicester Handyman Ltd | Construction | 2024 |
| Bicester Heritage Brickwork Limited | Construction | 2024 |
| Bicester Heritage Limited | Real estate | 2025 |
| Bicester Heritage Park Limited | Real estate | 2016 |
| Bicester Home Maintenance Limited | Construction | 2024 |
| Bicester Hotel Ltd | Hospitality | 2006 |
| Bicester Interiors Ltd | Construction | 2018 |
| Bicester Islamic Cultural Society | Education | 2022 |
| Bicester Kitchens Ltd | Construction | 2025 |
| Bicester Landscapes Ltd | Administrative & support | 2020 |
| Bicester Meeting Rooms Limited | Administrative & support | 2016 |
| Bicester MOT & Service Centre Ltd | Wholesale & retail | 2024 |
| Bicester MOT Ltd | Wholesale & retail | 2022 |
| Bicester Motion Estate Services Limited | Real estate | 2023 |
| Bicester Motion Estate Services Newco Limited | Administrative & support | 2026 |
| Bicester Motion Group Limited | Financial services | 2025 |
| Bicester Motion Holdings Limited | Financial services | 2023 |
| Bicester Motion Limited | Real estate | 2012 |
| Bicester Motion Management Services Ltd | Financial services | 2023 |
| Bicester Motion Management Services Newco Limited | Real estate | 2026 |
| Bicester Motion Opco Holdco Limited | Financial services | 2025 |
| Bicester Motion Propco Holdco Limited | Financial services | 2025 |
| Bicester Motion Radial Limited | Real estate | 2025 |
| Bicester Motion Ranges 1 Limited | Real estate | 2023 |
| Bicester Motion Ranges 2 Limited | Real estate | 2025 |
| Bicester Motion Reserve Limited | Real estate | 2025 |
| Bicester Motorcycle Hub Ltd | Health & social care | 2026 |
| Bicester Originals Ltd | Wholesale & retail | 2020 |
| Bicester Pride Community Interest Company | Other services | 2021 |
| Bicester Promotion Limited | Administrative & support | 2023 |
| Bicester Property Maintenance Ltd | Construction | 2021 |
| Bicester Property Management Limited | Real estate | 2022 |
| Bicester Publishing Ltd | Information & communication | 2024 |
| Bicester Recovery and Transport Limited | Transport & logistics | 2025 |
| Bicester Removals Ltd | Transport & logistics | 2022 |
| Bicester Roofing Company Limited | Construction | 1975 |
| Bicester Rugby Union Football Club Ltd | Arts & recreation | 2002 |
| Bicester Scaffold Limited | Construction | 2022 |
| Bicester Self Storage Limited | Other services | 2013 |
| Bicester Tailor Limited | Other services | 2025 |
| Bicester Timber Ltd | Wholesale & retail | 2025 |
| Bicester Tree Services Ltd. | Agriculture & fishing | 2015 |
| Bicester Tyre and Exhausts Limited | Wholesale & retail | 2011 |
| Bicester Upvc Direct Limited | Construction | 2011 |
| Bicester Veterinary Centre (EOT) Trustee Limited | Administrative & support | 2025 |
| Bicester Veterinary Centre Limited | Professional & scientific | 2016 |
| Bicester Vision C.I.C. | Other services | 2020 |
| Bicester Wellness Clinic Ltd | Health & social care | 2023 |
| Bicester Wills Ltd | Other services | 2015 |
| Bicester Windows and Doors Ltd | Extraterritorial | 2015 |
| Big Brain Innovations Ltd | Education | 2023 |
| Big Brand Marketing Ltd | Other services | 2022 |
| Big OWL Productions Ltd | Professional & scientific | 2024 |
| Bigganbide Ltd | Professional & scientific | 2024 |
| Bikuri IT Consulting Ltd | Professional & scientific | 2007 |
| Biomax Scientific Consultancy Limited | Professional & scientific | 2011 |
| Biomodify Ltd | Professional & scientific | 2019 |
| Biopartner.Co.Uk Limited | Administrative & support | 2005 |
| Biotronik U.K. Limited | Wholesale & retail | 1979 |
| Birch Fontaine Limited | Professional & scientific | 1986 |
| Birchraven Limited | Real estate | 2026 |
| Bird Transport Ltd | Transport & logistics | 2025 |
| BISCUIT4 Limited | Professional & scientific | 2022 |
| Bishops Better Limited | Hospitality | 2023 |
| Bitartes Ltd | Information & communication | 2024 |
| Bkbm Enterprise Limited | Information & communication | 2015 |
| BKS Specialist Services Limited | Transport & logistics | 2008 |
| BL Property Investments Limited | Real estate | 2023 |
| Black Bear Homes Ltd | Real estate | 2021 |
| Black London Ltd | Wholesale & retail | 2025 |
| Black Madson Ltd | Wholesale & retail | 2025 |
| Black River Enterprises Ltd | Information & communication | 2013 |
| Blackberry Property Limited | Real estate | 2010 |
| Blackeagle-Team Ltd | Hospitality | 2024 |
| Blackmont Holdings Limited | Construction | 2021 |
| Blackstock Property Investments Limited | Real estate | 2023 |
| Blackthorn Management Company Limited | Households | 1996 |
| Blackwell Farm & Estate Services Limited | Professional & scientific | 2021 |
| Bladon Sports Limited | Arts & recreation | 2024 |
| Blazdell Consulting Ltd | Professional & scientific | 2018 |
| Bleached Club Ltd | Information & communication | 2021 |
| Blencathra Property Investments Limited | Real estate | 1997 |
| Blenheim Polo Ltd | Arts & recreation | 2025 |
| Blenheim Recruitment Limited | Administrative & support | 2020 |
| Blin Consulting Limited | Professional & scientific | 2022 |
| BLK LBL Consultancy Limited | Professional & scientific | 2023 |
| Bloompath.Jam Ltd | Wholesale & retail | 2025 |
| Blue CAP Coffee Ltd | Professional & scientific | 1992 |
| Blue CAP Coffee Retail Ltd | Wholesale & retail | 2011 |