| SLG Audio Ltd | Professional & scientific | 2023 |
| SLH Short Stays Ltd | Hospitality | 2024 |
| Smart Workplace Solutions Ltd | Professional & scientific | 2024 |
| SMC International Expansion Ltd | Professional & scientific | 2019 |
| Smithfield Advisory Ltd | Financial services | 2019 |
| Sojourn Property Management Ltd | Real estate | 2022 |
| Sona Home Improvements Ltd | Construction | 2019 |
| Sophia Lambert Homes Ltd | Real estate | 2014 |
| Spark Sports Academy Limited | Education | 2026 |
| Spirehead Properties Limited | Real estate | 1992 |
| SRH Solutions Ltd | Information & communication | 2010 |
| Stanwicks Property Limited | Real estate | 2020 |
| Steady Canines Co Ltd | Other services | 2026 |
| Steel&Diesel Limited | Construction | 2024 |
| Stephen Ball Project Management Ltd | Information & communication | 2020 |
| Stowchase Limited | Households | 1998 |
| Stroh Limited | Professional & scientific | 2024 |
| Stuart Parsons Tax Ltd | Professional & scientific | 2024 |
| Suckx Ltd | Administrative & support | 2021 |
| Sunbear Energy Solutions Ltd | Construction | 2025 |
| Superbear Projects Limited | Information & communication | 2017 |
| T Dexter Construction Ltd | Construction | 2019 |
| Taletrove UK Limited | Information & communication | 2022 |
| Talunia Capital Ltd | Professional & scientific | 2022 |
| Talunia Properties Limited | Real estate | 2025 |
| Taylor Coaching Limited | Education | 2019 |
| Teamimprover.Com Ltd | Information & communication | 2011 |
| Tech GP Limited | Information & communication | 2016 |
| Thames Valley Farriers Ltd | Agriculture & fishing | 2019 |
| THE Biker Bean Coffee Ltd | Hospitality | 2023 |
| THE Coppice (Thame) Residents Company Limited | Households | 1997 |
| THE Glow Group Trading Limited | Other services | 2024 |
| THE Ironing Board Uxbridge Ltd | Other services | 2017 |
| THE JR Sports Group Ltd | Health & social care | 2021 |
| THE Leg-Care Company (UK) Limited | Wholesale & retail | 2007 |
| THE Paper Whelk Limited | Wholesale & retail | 2023 |
| THE Radio Amateurs' Emergency Network Ltd | Professional & scientific | 2015 |
| THE Sanderum Centre Limited | Administrative & support | 1978 |
| THE Sokkr Group Ltd | Arts & recreation | 2024 |
| THE Vinyl Frontier Inc Ltd | Manufacturing | 2010 |
| Thousand Films Limited | Information & communication | 2018 |
| Thunderbird Transport Limited | Transport & logistics | 2017 |
| Time IS Precious Properties Limited | Hospitality | 2015 |
| Townsend Freelance Services Limited | Information & communication | 2026 |
| Treksumo Limited | Information & communication | 2020 |
| Trigg Software Limited | Information & communication | 2018 |
| Trinity (Oxfordshire) Limited | Wholesale & retail | 2013 |
| Tripay Limited | Administrative & support | 2022 |
| Trisdon LLP | | 2012 |
| UK Solar Installations Ltd | Construction | 2024 |
| Unicorn Pools and Hot Tubs Ltd | Administrative & support | 2017 |
| Unite Automation Limited | Wholesale & retail | 2009 |
| UP! the OD Consultancy Limited | Professional & scientific | 2017 |
| V. Castro Stories Limited | Information & communication | 2022 |
| Venus Property Ventures Ltd | Real estate | 2022 |
| Veritas Voyages Ltd | Administrative & support | 2025 |
| Vintage and Modern Guitars Limited | Wholesale & retail | 2010 |
| Vision Interim Limited | Professional & scientific | 2008 |
| Vivente Being Ltd | Professional & scientific | 2008 |
| Walton Lake Management Company Five Limited | Real estate | 2010 |
| Walton Lake Management Company Four Limited | Real estate | 2010 |
| Walton Lake Management Company One Ltd | Real estate | 2024 |
| Walton Lake Management Company Three Limited | Real estate | 2010 |
| Walton Lake Management Company Two Limited | Real estate | 2010 |
| Warner Bathrooms Limited | Construction | 2006 |
| Wear & Resist Limited | Manufacturing | 2026 |
| Weldid Limited | Manufacturing | 2015 |
| Wheatfields Management Limited | Households | 2012 |
| White Sky Hospitality Limited | Professional & scientific | 2007 |
| White Water Treatment Ltd | Professional & scientific | 2023 |
| Windel Properties Limited | Real estate | 1997 |
| Wipstr Engineering Ltd. | Extraterritorial | 2015 |
| Wolstenholme Limited | Professional & scientific | 2008 |
| Yellow Bear Financial Consultancy LLP | | 2015 |
| Yulia & SON Limited | Health & social care | 2013 |
| YYZ Property Limited | Real estate | 2015 |
| Zaim CS Ltd | Other services | 2024 |
| Zeferino Ltd | Arts & recreation | 2015 |
| Zest Developments Limited | Construction | 2008 |
| Zest Ventures Holdings Limited | Financial services | 2012 |
| Zest Ventures Limited | Financial services | 2004 |