| THE Small Stuff Ltd | Construction | 2024 |
| THE Snooty Mehmaan Restaurant Limited | Hospitality | 2023 |
| THE Solid Bar Company Ltd | Wholesale & retail | 2018 |
| THE Storage Depot (Oxford) Ltd | Other services | 2024 |
| THE Swan@Hay Limited | Hospitality | 2015 |
| THE Tree Art Gallery Ltd | Arts & recreation | 2021 |
| THE Welcombe Estate Limited | Hospitality | 2026 |
| THE White Horse Show Trust Limited | Professional & scientific | 2013 |
| THE White Horse Woolstone Ltd | Hospitality | 2022 |
| Thomas Bell-Richards Limited | Professional & scientific | 1996 |
| Thorpe Enterprises (Cardiff) Limited | Real estate | 2023 |
| Thorptek Ltd | Information & communication | 2022 |
| Thriller Limited | Manufacturing | 2025 |
| Timeless Tea Party Hire Ltd | Other services | 2023 |
| Timothy Austin Barder Ltd | Information & communication | 2014 |
| Timpson Engineering Ltd | Manufacturing | 2021 |
| Tinta Viva Translation Ltd | Professional & scientific | 2015 |
| Tlkc Ltd | Professional & scientific | 2012 |
| Tmhora Trading Limited | Wholesale & retail | 2018 |
| Tmtm Associates Limited | Hospitality | 2023 |
| Tony Property Services Ltd | Construction | 2025 |
| Top Gauge Ltd | Wholesale & retail | 2026 |
| Townsend Montessori Nurseries Ltd | Education | 2008 |
| Track Day Toyz Ltd | Wholesale & retail | 2012 |
| Travel Management Services Limited | Professional & scientific | 1998 |
| Tribe Zero-Waste Ltd | Wholesale & retail | 2025 |
| Tricia Bracegirdle Ltd | Wholesale & retail | 2010 |
| Trinity Carers Services Ltd | Health & social care | 2022 |
| Trinity Private Ltd | Wholesale & retail | 2013 |
| Triple Motif Ltd | Construction | 2025 |
| Tripod Production Studios Limited | Information & communication | 2024 |
| TT9 Logistics Ltd | Transport & logistics | 2020 |
| Tudor Medical Ltd | Health & social care | 2022 |
| Tulimbi Limited | Health & social care | 2018 |
| Uffington Self Build Ltd | Construction | 2023 |
| Urbanscale Limited | Real estate | 2008 |
| Vale Engineers Ltd | Professional & scientific | 2011 |
| Vale Prestige Chauffeurs LLP | | 2014 |
| Valoryx Ltd | Wholesale & retail | 2025 |
| Vapour Life Limited | Wholesale & retail | 2017 |
| Varney Close Management Company Limited | Households | 2024 |
| Velare Intimates Limited | Wholesale & retail | 2025 |
| Verdun Grace Ltd | Professional & scientific | 2013 |
| Veronica Mackinnon Trading Limited | Wholesale & retail | 2007 |
| Vertex Healthcare Solutions Ltd | Administrative & support | 2023 |
| Vistahaven Limited | Hospitality | 2025 |
| Viviviv Limited | Extraterritorial | 2011 |
| Voicescript Ltd | Information & communication | 2026 |
| VP Chauffeurs Ltd | Transport & logistics | 2020 |
| W G Clay Contractors Ltd | Construction | 2019 |
| W J Saunders Forestry Ltd | Agriculture & fishing | 2026 |
| Wallingfalls Ltd | Health & social care | 2022 |
| Warburton & SON Services Limited | Real estate | 2021 |
| Wave One Solutions Limited | Professional & scientific | 2015 |
| WCA Environment Limited | Professional & scientific | 2005 |
| WCA Environment Trustee Limited | Administrative & support | 2012 |
| WE Sell Used AV Limited | Wholesale & retail | 2024 |
| Weaver Khan Architects Limited | Professional & scientific | 2006 |
| Webbers Plumbing and Heating Limited | Construction | 2023 |
| Welch Telecom Limited | Extraterritorial | 1999 |
| Wenkathic Enterprise Limited | Information & communication | 2007 |
| White Hart (Faringdon) Limited | Other services | 1995 |
| White Horse Cattery Ltd | Agriculture & fishing | 2026 |
| White Horse Health Care Ltd | Health & social care | 2025 |
| White Horse Medical Services Ltd | Health & social care | 2008 |
| White Horse Plastics Limited | Manufacturing | 1973 |
| White Horse Print & Signs Ltd | Manufacturing | 2024 |
| Wicklesham Commercial Properties Ltd | Real estate | 1996 |
| Willis House Developers Limited | Construction | 2014 |
| Willis Plant Sales Limited | Wholesale & retail | 2024 |
| Windjammer (SA) Limited | Health & social care | 2019 |
| Windrush Insurance Brokers Limited | Real estate | 1971 |
| Wood Family Practice Limited | Health & social care | 2019 |
| Wylde Green Nursery Limited | Health & social care | 2013 |
| Wythwanell Productions Ltd. | Information & communication | 2013 |
| XED Properties Ltd | Real estate | 2023 |
| Yagda Ltd | Information & communication | 2024 |
| Young Drains Ltd | Water & waste | 2023 |
| Youngmans Headington Ltd | Other services | 2019 |
| Youngmans Marlow Ltd | Other services | 2023 |
| Youngmans Marylebone Ltd | Other services | 2023 |
| Youngmans Oxford Ltd | Other services | 2018 |
| ZEN Dog Grooming Parlour Ltd | Other services | 2021 |
| Zingaro Ltd | Professional & scientific | 2013 |