| Vulpix Media Ltd | Information & communication | 2024 |
| VV Ventures Limited | Other services | 2024 |
| VV Ventures TOO Limited | Other services | 2025 |
| Waddams Limited | Real estate | 2012 |
| Wallingford Physiotherapy Practice Ltd | Other services | 2026 |
| Ward Capital Investment Limited | Real estate | 2025 |
| Wardour Lodge Estates Limited | Hospitality | 1950 |
| Watermelon PIP Ltd | Real estate | 2025 |
| Watts Coaching & Consultancy Ltd | Professional & scientific | 2008 |
| Wayahead Services Limited | Construction | 2001 |
| Wayne Paul Tica Limited | Extraterritorial | 2025 |
| WCL Estates Ltd | Construction | 2015 |
| WE ARE Couch Ltd | Professional & scientific | 2010 |
| Webson Properties Limited | Real estate | 2003 |
| WEE Woolly Wonders Ltd | Manufacturing | 2025 |
| West Barn Studios Limited | Information & communication | 2008 |
| West Grange RTM Company Limited | Households | 2004 |
| West Ilsley Stables Ltd | Real estate | 2022 |
| West Mental Health Ltd | Education | 2023 |
| Westernchefs Ltd | Hospitality | 2026 |
| Weston Road Apartments Ltd | Real estate | 2022 |
| WG Groundworks Ltd | Construction | 2024 |
| Whichelo Design Studio Ltd | Construction | 2013 |
| Whisker Wizards Limited | Wholesale & retail | 2024 |
| White Bear Estates Ltd | Real estate | 2022 |
| White Horse Designs Oxfordshire Limited | Professional & scientific | 2024 |
| White Horse Tiling Ltd | Construction | 2022 |
| White Rose Cosmetics Ltd. | Wholesale & retail | 2025 |
| Whites Orchard (Blewbury) Management Company Limited | Households | 2005 |
| WHO When Where Genealogy Limited | Information & communication | 2020 |
| Whoney Media Concepts Ltd | Information & communication | 2025 |
| Wika Optical Sensing Limited | Manufacturing | 2003 |
| Wild City Community CIC | Professional & scientific | 2024 |
| Wild City Studio Ltd | Professional & scientific | 2024 |
| Wild to Wonderful Gardens Ltd | Administrative & support | 2019 |
| Wild Tribe Collective CIC | Education | 2025 |
| William Jones Lettings Limited | Real estate | 2016 |
| Willowcroft Academy Trust | Education | 2013 |
| Wilson's a to Z Courier & Distribution Ltd | Transport & logistics | 2010 |
| Winterbourne Siblings Limited | Real estate | 2025 |
| Winterbourne Slate Ltd | Wholesale & retail | 2023 |
| Wisdom Pioneer Consultancy Services Limited | Information & communication | 2019 |
| Wise OWL Accountants Ltd | Professional & scientific | 2006 |
| WJ Hero Ltd | Real estate | 2025 |
| WJA Properties Limited | Real estate | 2008 |
| WJP Brickwork Limited | Construction | 2017 |
| WK Cleaning Limited | Administrative & support | 2025 |
| WMAN10 Ltd | Agriculture & fishing | 2021 |
| Wolves Logistics 2025 Ltd | Transport & logistics | 2025 |
| Wong Meridian Capital Ltd | Real estate | 2026 |
| Woodeeworld Ltd | Wholesale & retail | 2015 |
| Woods Productions Ltd | Information & communication | 2015 |
| Woods Property Investments (Oxford) Limited | Real estate | 2023 |
| Workplace Design Services Ltd | Administrative & support | 2019 |
| Worthy Property Solutions Ltd | Real estate | 2018 |
| Writedevelopment Ltd | Professional & scientific | 2026 |
| Writeescape Ltd | Professional & scientific | 2025 |
| WW Trans Ltd | Transport & logistics | 2016 |
| Wyetech Solutions Ltd | Construction | 2024 |
| XEN State Limited | Administrative & support | 2014 |
| Xland Investments Limited | Real estate | 2025 |
| YAI IT Limited | Information & communication | 2020 |
| Yellow Triangle Properties Ltd | Real estate | 2025 |
| Yfmedia Ltd | Professional & scientific | 2023 |
| York Farm LLP | | 2018 |
| Your Dentist Didcot Ltd | Health & social care | 2016 |
| Your Own Market (YOM) Limited | Wholesale & retail | 2020 |
| Yuill Consulting Ltd | Professional & scientific | 2025 |
| Zang Creative Ltd | Professional & scientific | 2025 |
| Zcodedigitals Ltd | Information & communication | 2022 |
| Zenrise IT Solutions Ltd | Information & communication | 2025 |
| Zeta Partners Limited | Professional & scientific | 2026 |
| Zigana Limited | Hospitality | 2017 |
| ZLS Investment Limited | Real estate | 2023 |
| ZM Events Ltd | Arts & recreation | 2017 |
| Zona Properties Ltd | Real estate | 2023 |
| Zoob Cyber Consultancy Ltd | Information & communication | 2023 |
| Zulu Farm Limited | Agriculture & fishing | 2022 |
| Zulu Property LLP | | 2018 |
| Zuna Web Limited | Information & communication | 2014 |
| Zwoliox Ltd | Real estate | 2025 |
| Zyba Limited | Information & communication | 2004 |
| ZYP Prosperia Limited | Real estate | 2025 |