| Waverley Trayner Limited | Professional & scientific | 2017 |
| Way Funky Europe Limited | Administrative & support | 2018 |
| WE Three Kings Limited | Wholesale & retail | 2011 |
| Webb Court Property Limited | Real estate | 2026 |
| Webb Electrical Ltd | Construction | 2021 |
| Webb Groundworks Ltd | Construction | 2021 |
| Webb Plumbing, Heating & Bathrooms Ltd | Construction | 2021 |
| Webb Retailing Limited | Professional & scientific | 2016 |
| Webbconstruction Limited | Construction | 2015 |
| Webboutiques Limited | Information & communication | 2007 |
| Wedmore Court (Wantage) Management Company Limited | Households | 2017 |
| Weglarz Kuropatwa Ltd | Construction | 2018 |
| Weigh IT UP Ltd | Wholesale & retail | 2022 |
| Welbeck Place Management Company Limited | Households | 2006 |
| WELCARE24/7 Group Limited | Administrative & support | 2023 |
| Wellbrook Mews Residents Association (Tring) Limited | Real estate | 1996 |
| Weller Plumbing and Heating Limited | Administrative & support | 2015 |
| Weller Services (UK) Limited | Manufacturing | 2009 |
| Wendon Annex Rental Ltd | Hospitality | 2023 |
| Wenris Ltd | Professional & scientific | 2024 |
| Wenrisc Enterprise Limited | Financial services | 2021 |
| West Berkshire Golf & Leisure Ltd | Arts & recreation | 2026 |
| West Courier Services Ltd | Transport & logistics | 2023 |
| West END Financial Management Limited | Financial services | 2013 |
| West Grove (Oxford) Limited | Households | 2007 |
| West Oak Construction Limited | Construction | 2017 |
| West Oak Property Limited | Real estate | 2023 |
| West Oxfordshire Academy of Performing Arts Ltd | Arts & recreation | 2011 |
| West Oxfordshire Business Awards Limited | Professional & scientific | 2010 |
| West Oxfordshire Housing Limited | Extraterritorial | 2004 |
| West Oxfordshire Trans & Non-Binary Support CIC | Administrative & support | 2025 |
| West Oxon Properties Ltd | Real estate | 2020 |
| West Oxon Property Management Ltd | Real estate | 2024 |
| Westcote Close Management Company Limited | Households | 2002 |
| Westcote Kitchens Ltd | Construction | 2020 |
| Westfork Construction Ltd | Construction | 2013 |
| Weston Garage Limited | Information & communication | 2015 |
| WFS Country Shop 2 Limited | Financial services | 2003 |
| WFS Country Shop Limited | Wholesale & retail | 2003 |
| WH Consultancy Limited | Information & communication | 2024 |
| Wharrels Hill LLP | | 2006 |
| Whisper & VOW Events Limited | Information & communication | 2026 |
| Whisper Controls Limited | Construction | 2016 |
| White Brothers (Witney) Limited | Wholesale & retail | 2011 |
| White Fractal Limited | Information & communication | 2020 |
| White Hart Cotswolds Management Company Limited | Households | 2004 |
| Whitegrail Accounting Ltd | Professional & scientific | 2025 |
| Whitegrail Care Ltd | Health & social care | 2022 |
| Whitehaven Consulting Ltd | Professional & scientific | 2023 |
| Whitehelm Network Security Limited | Information & communication | 2004 |
| Whiteoak Associates Ltd | Administrative & support | 2017 |
| Whiteoak Green Property Ltd | Real estate | 2020 |
| WHS Cleaning Services Ltd | Administrative & support | 2022 |
| Wide BOY Media Ltd | Manufacturing | 2008 |
| Wiedemann Restaurants Ltd | Hospitality | 2018 |
| Wilde Enterprises Limited | Extraterritorial | 2016 |
| Wilder Travels Ltd | Professional & scientific | 2022 |
| Wildlife Savvy Ltd | Professional & scientific | 2013 |
| William & Partners PIO Limited | Professional & scientific | 2023 |
| William Hodgson Limited | Construction | 2015 |
| Willoughby Messer Limited | Real estate | 2023 |
| Willow Brook (Abingdon) Management Company (NO 2) Limited | Households | 1999 |
| Willow Brook (Abingdon) Management Company (NO 3) Limited | Households | 1999 |
| Willow Brook (Abingdon) Management Company (NO 4) Limited | Households | 2000 |
| Willow Brook (Abingdon) Management Company Limited | Households | 1998 |
| Willow Crossley Ltd | Wholesale & retail | 2017 |
| Willow International Ltd | Wholesale & retail | 2018 |
| Wilsdon and Buckingham Building and Carpentry Limited | Construction | 2016 |
| Wilson Properties (Witney) Ltd | Real estate | 2019 |
| Wilsons Auctions Oxford Capital Limited | Extraterritorial | 2016 |
| Wilsons Auctions Oxford Limited | Wholesale & retail | 1986 |
| Winalan Properties Limited | Real estate | 1977 |
| Windabbey Limited | Real estate | 1992 |
| Window Design Soft Furnishings Limited | Wholesale & retail | 2017 |
| Windrush Bike Trading Limited | Wholesale & retail | 2024 |
| Windrush Business Services Limited | Professional & scientific | 2013 |
| Windrush Ecology Limited | Administrative & support | 2009 |
| Windrush Family Mediation Limited | Other services | 2015 |
| Windrush Flooring Limited | Construction | 2013 |
| Windrush Homes Ltd | Construction | 2003 |
| Windrush Kitchens and Bathrooms Ltd | Construction | 2014 |
| Windrush Park (Phase 1) Carterton Management Company Limited | Households | 2003 |
| Windrush Polythene & Packaging Ltd | Wholesale & retail | 2020 |
| Windrush Press Limited | Information & communication | 2006 |
| Windrush Radio Limited | Information & communication | 2021 |
| Windrush Technology Limited | Wholesale & retail | 1999 |
| Windrush Transport Limited | Transport & logistics | 2002 |
| Windrush Valley House Clearance Limited | Other services | 2021 |
| Winetraders (UK) Limited | Wholesale & retail | 1998 |
| Wingpow International Limited | Manufacturing | 2006 |
| Winhomes Limited | Real estate | 2021 |
| Winmac UK Limited | Wholesale & retail | 1999 |
| Winsome Properties Limited | Real estate | 1996 |
| Wisdom Integrity Leadership Dialogue Democracy and Women (Trading AS Wildd Women) CIC | Administrative & support | 2025 |
| Wiskin Block Services Limited | Administrative & support | 2021 |
| Wiskin Garden Maintenance Limited | Administrative & support | 2019 |
| Witan Holdings Limited | Professional & scientific | 2022 |
| Witan Park Management Limited | Administrative & support | 1989 |
| Witney Aquatic Company Limited | Real estate | 1961 |
| Witney Beauty Limited | Other services | 2016 |