| Whitecross Accountancy Limited | Professional & scientific | 2015 |
| Whitecross Business Support Limited | Extraterritorial | 2018 |
| Whites Cleaning Company Limited | Administrative & support | 2013 |
| Whites Decorating Limited | Construction | 2020 |
| Whites of Appleton Ltd | Administrative & support | 2003 |
| Whitestone Relocations Ltd | Hospitality | 2025 |
| Whitetip Contracting Ltd. | Construction | 2010 |
| Whittaker Lemberg Productions Ltd | Information & communication | 2018 |
| Whittle Square Management Company Limited | Real estate | 2012 |
| Whmotorservice Ltd | Wholesale & retail | 2023 |
| Whtp Builders Limited | Construction | 2018 |
| WHY BE Happy CIC | Education | 2026 |
| Whyteline Limited | Information & communication | 2020 |
| Wick Farming Limited | Agriculture & fishing | 2012 |
| Wide Angle Films (Oxon) Limited | Information & communication | 2010 |
| Widewealth Investmentproperty Ltd | Financial services | 2026 |
| Widgenton Consultants Ltd | Professional & scientific | 2020 |
| Widgenton Investments Limited | Financial services | 2021 |
| Widow Tree Ltd | Other services | 2025 |
| Wifi Witch Limited | Information & communication | 2025 |
| Wila Lighting Limited | Manufacturing | 1990 |
| Wilberforce Place Management Company Limited | Households | 2006 |
| Wilbraham Mansions Residents Association Limited | Households | 1982 |
| Wild Goose Oxford Tours Ltd | Administrative & support | 2023 |
| Wild Honey Love Limited | Wholesale & retail | 2014 |
| Wild Horses Medical Ltd | Health & social care | 2024 |
| Wild Roots Landscaping Limited | Administrative & support | 2015 |
| Wildfoundry Limited | Administrative & support | 2012 |
| Wildgoose Enterprises Ltd | Professional & scientific | 2024 |
| Wildlings Group Ltd | Education | 2020 |
| Wildwood Properties (Oxford) Limited | Real estate | 2001 |
| Wilkins Kennedy LLP | | 2011 |
| Wilkinson Expertise & Learning Limited | Professional & scientific | 2015 |
| Will on the Green Ltd | Construction | 2026 |
| Willett Property Limited | Other services | 2019 |
| William Jones Godard Ltd | Real estate | 2020 |
| William Kimber Management Limited | Professional & scientific | 2006 |
| William Rowan Hamilton Trust | Education | 2012 |
| Williams Bros. (Witney) Limited | Real estate | 1948 |
| Williams Financial Services Limited | Professional & scientific | 2012 |
| Willis Duncan Strategic Services Ltd | Administrative & support | 2017 |
| Willis Franklin Care Ltd | Financial services | 2025 |
| Willow Cottage Nurseries Ltd | Education | 2008 |
| Willowbreeze Limited | Information & communication | 2004 |
| Willowtree Limited | Construction | 1993 |
| Wilson Engineering and Management Limited | Professional & scientific | 2019 |
| Wilson Life Sciences Limited | Professional & scientific | 2017 |
| Wilson Shiplake Ltd | Wholesale & retail | 2025 |
| Wiltshire Cars Limited | Transport & logistics | 2022 |
| Windich Ltd | Professional & scientific | 2016 |
| Windle Trust International | Education | 2001 |
| Windmill Stud Farm Ltd | Agriculture & fishing | 2025 |
| Windrush Door & Window Services Limited | Construction | 2000 |
| Windsor Respiratory Ltd | Health & social care | 2017 |
| Windsurf Limited | Information & communication | 2020 |
| Wingfield Residents Limited | Households | 1973 |
| Wingson Limited | Real estate | 2020 |
| Winter Architects Ltd | Professional & scientific | 2023 |
| Wintringham NEWCO1 Limited | Financial services | 2017 |
| Wireless Excellence Limited | Information & communication | 1996 |
| Wirral Table and Chair Hire Ltd | Arts & recreation | 2010 |
| Wisdom Education Consultancy Ltd | Education | 2023 |
| Wisdom in Practice Group Limited | Information & communication | 2021 |
| Wisdomia Group Ltd | Information & communication | 2024 |
| Wise About Money Limited | Financial services | 2015 |
| Wise Provision Ltd | Wholesale & retail | 2026 |
| Wiseser Ltd | Real estate | 2026 |
| With Bubble Ltd. | Real estate | 2025 |
| Witney Pride Community Interest Company | Other services | 2019 |
| Wittgenstein Associates Limited | Professional & scientific | 2010 |
| Witts END Consulting Limited | Information & communication | 2010 |
| Wizebee Ltd | Information & communication | 2012 |
| WLS 2026 Limited | Professional & scientific | 2005 |
| WM Logistics Ltd | Transport & logistics | 2025 |
| WMJ Property Ltd | Real estate | 2018 |
| Wobbly Bridge Creations Ltd | Arts & recreation | 2020 |
| WOK IT UP Limited | Wholesale & retail | 2025 |
| Wolfson Oxford Developments Limited | Construction | 2024 |
| Wolsey Hall Oxford International Ltd | Education | 2014 |
| Wolvercote Convenience Ltd | Wholesale & retail | 2025 |
| Wolvercote Super Store Limited | Wholesale & retail | 2023 |
| Women's Cancer Prevention PNG Limited | Education | 2023 |
| Wonder (PVT) Ltd | Health & social care | 2015 |
| Wonder WOK Ltd | Hospitality | 2025 |
| Wonders of Wizards Ltd | Wholesale & retail | 2021 |
| Wondertouch Ltd | Information & communication | 2010 |
| Wood Brothers Distilling Company Limited | Manufacturing | 2017 |
| Woodborough Properties Limited | Households | 1998 |
| Woodcraft in Bronze Limited | Arts & recreation | 2010 |
| Woodeson Developments Limited | Construction | 2007 |
| Woodfarm Kebab & Pizza Ltd | Hospitality | 2024 |
| Woodhouse Price Ltd | Professional & scientific | 2004 |
| Woodland Holidays Limited | Hospitality | 2022 |
| Woodlands Oxford Properties Limited | Construction | 2021 |
| Woodpecker Sound Limited | Information & communication | 2015 |
| Woodperry Road Development Limited | Construction | 2016 |
| Woodroffe Bible College Limited | Education | 2020 |
| Woodruff Engineering Limited | Professional & scientific | 2024 |
| Woodruff Scientific Limited | Professional & scientific | 2006 |
| Woods Industries Ltd | Transport & logistics | 2026 |