| 1 Market Street Woodstock Limited | Administrative & support | 2014 |
| 13 Holland Road Limited | Real estate | 1999 |
| 31 Digital Marketing Limited | Information & communication | 2013 |
| 3DCOMPOUND Ltd | Information & communication | 2013 |
| 60 Highbury Grove Ltd | Households | 2026 |
| A G J Capel Ltd | Wholesale & retail | 2025 |
| A J O'Connor Projects Ltd | Construction | 2019 |
| Abjad Limited | Other services | 1996 |
| Absolute Autonomy Limited | Wholesale & retail | 2005 |
| Accounting Centre Eynsham Ltd | Professional & scientific | 2002 |
| Ace of Cups Limited | Hospitality | 2020 |
| Activate Impact Solutions Limited | Information & communication | 1999 |
| Adept Management Limited | Professional & scientific | 2000 |
| Advancive Ltd | Extraterritorial | 2007 |
| Aesthetic Sisters Group Ltd | Other services | 2023 |
| AG HIP and Knee Ltd | Health & social care | 2010 |
| Against the Grain Oxfordshire CIC | Education | 2025 |
| AJP Coaching Ltd | Health & social care | 2025 |
| AJR Building & Carpentry Solutions Limited | Construction | 2014 |
| AJT (UK) Limited | Professional & scientific | 2002 |
| Alan Aston Roofing Supplies Limited | Wholesale & retail | 1989 |
| Aldridge&Co Properties Ltd | Real estate | 2021 |
| Aldwyns Limited | Professional & scientific | 2024 |
| Alex Crepes Ltd | Hospitality | 2022 |
| Alexandra Murray-Zmijewski Limited | Professional & scientific | 2022 |
| Allavo Events Limited | Arts & recreation | 2024 |
| Amalee Holdings Limited | Real estate | 2025 |
| Ameera Investment & Management Ltd | Real estate | 2017 |
| Amerelia Collective Limited | Professional & scientific | 2024 |
| Amerelia Concepts Limited | Professional & scientific | 2026 |
| Amerelia Interoperable Limited | Professional & scientific | 2023 |
| Amica Pictures Ltd | Extraterritorial | 2021 |
| AML Technologies Limited | Extraterritorial | 2007 |
| Amodisc Ltd | Information & communication | 2015 |
| Apella Property Developments Limited | Construction | 2006 |
| Apple PYE Holdings Limited | Financial services | 2018 |
| Ashfurlong Academy Limited | Education | 2022 |
| Ashfurlong Group Holdings Ltd | Real estate | 2026 |
| Ashfurlong Limited | Real estate | 2017 |
| Ashfurlong MT Holdings Ltd | Real estate | 2026 |
| Ashfurlong Property Ltd | Real estate | 2026 |
| Astrita Limited | Health & social care | 2025 |
| Athelney Consulting Ltd | Professional & scientific | 2024 |
| Athelney Group Ltd | Financial services | 2024 |
| Atmos Technology Limited | Information & communication | 2014 |
| Augmented Intelligence Labs Limited | Information & communication | 2020 |
| AV8ER Limited | Transport & logistics | 2023 |
| Aviation English Ltd | Education | 2025 |
| Axia Group Limited | Administrative & support | 1993 |
| B Squared Building Control Ltd | Construction | 2025 |
| B.P.Y. Plastic Mouldings Limited | Manufacturing | 2020 |
| B.P.Y. Plastics Limited | Manufacturing | 2001 |
| Bagnalls Properties Limited | Real estate | 2024 |
| Bankside Emporium Ltd | Wholesale & retail | 2025 |
| Bar Reflexion Ltd | Hospitality | 2022 |
| Barrough Hospitality Limited | Real estate | 2003 |
| Barrough Limited | Real estate | 1999 |
| Baynham Property Limited | Real estate | 2024 |
| BCE Films Ltd | Information & communication | 2021 |
| Beacon Health Solutions Ltd | Information & communication | 2022 |
| Bell Duckworth Limited | Real estate | 2014 |
| BHE Plumbing Limited | Construction | 2011 |
| Biotechtive Ltd | Wholesale & retail | 2012 |
| Black Cobra Studios Ltd. | Information & communication | 2011 |
| Blenheim 1994 Settlement SPV Limited | Real estate | 2014 |
| Blenheim Agency Limited | Administrative & support | 2015 |
| Blenheim Art Foundation | Arts & recreation | 2013 |
| Blenheim Begbroke 2 Limited | Construction | 2023 |
| Blenheim Estate Homes Limited | Real estate | 2017 |
| Blenheim Estates Properties Limited | Real estate | 2004 |
| Blenheim Farm Partnership | | 1992 |
| Blenheim Farming Contractors Limited | Agriculture & fishing | 1979 |
| Blenheim Finance Limited | Real estate | 2014 |
| Blenheim Headspa Ltd | Other services | 2025 |
| Blenheim Palace Enterprises Limited | Real estate | 2026 |
| Blenheim Palace Game LLP | | 2014 |
| Blenheim Palace Heritage Foundation | Arts & recreation | 2015 |
| Blenheim Strategic Partners LLP | | 2021 |
| Blenheim Supporting Limited | Construction | 2010 |
| Blenheim Visitors Limited | Arts & recreation | 2006 |
| Body Fit Solutions Ltd | Arts & recreation | 2013 |
| BOS Implementers Ltd | Professional & scientific | 2025 |
| Bowpark Developments Limited | Real estate | 1988 |
| Boyd Enterprises (Brackley) Limited | Manufacturing | 2021 |
| Bravin Inns Ltd | Hospitality | 2016 |
| Bridal Reloved Tring Limited | Wholesale & retail | 2022 |
| Brookewood Consulting Ltd | Professional & scientific | 2025 |
| Brookhill QS Ltd | Professional & scientific | 2024 |
| Brothertons Brasserie (Oxford) Limited | Hospitality | 2018 |
| Bsil Holdings Limited | Hospitality | 2016 |
| Btsmag Limited | Education | 2017 |
| Buan Press Limited | Information & communication | 2025 |
| Build Smart Contracts Ltd | Information & communication | 2025 |
| Building Services Midlands Limited | Construction | 1990 |
| Cameo House Limited | Households | 1998 |
| Campsfield Ltd | Real estate | 2016 |
| Camyleon Limited | Professional & scientific | 2011 |
| Capel&Co Ltd. | Agriculture & fishing | 2017 |
| Carbon Services Limited | Professional & scientific | 2023 |
| Carolyn Barraclough ELT Projects Limited | Information & communication | 2015 |