| Rhino Sound Limited | Information & communication | 2022 |
| Ridgeway Management Consultant Services Limited | Professional & scientific | 2018 |
| Riley Business Consulting Limited | Professional & scientific | 2012 |
| Ringo Pizza Limited | Hospitality | 2010 |
| RIO RIO Swim Limited | Manufacturing | 2024 |
| Robus Health Limited | Arts & recreation | 2024 |
| Rockwood Film Productions Ltd | Information & communication | 2021 |
| Rowdown Stables Limited | Real estate | 2015 |
| RSR Gases Ltd | Wholesale & retail | 2026 |
| Rugs Direct Online Limited | Wholesale & retail | 2014 |
| Russ-Silsby Pubs Ltd | Hospitality | 2013 |
| Sable & Wild Garlic Ltd | Hospitality | 2026 |
| SAM Shepherd Plastering Ltd | Construction | 2008 |
| Sayers and Partners LLP | | 2010 |
| Scho.Ai Limited | Professional & scientific | 2022 |
| Sebenver Limited | Real estate | 2022 |
| Seraph Science Limited | Professional & scientific | 2013 |
| Sharp and Strong Ltd. | Construction | 2009 |
| Sharp and Strong Steel Buildings Ltd | Construction | 2018 |
| Sheldons Piece Management Limited | Households | 1997 |
| Sidhu Trading Company Ltd | Real estate | 2023 |
| Sigasong Ltd | Information & communication | 2000 |
| Sitrus Ltd | Information & communication | 2017 |
| SKL Property Limited | Real estate | 2014 |
| Slate 7 Limited | Information & communication | 2013 |
| Slateville Limited | Households | 1989 |
| SLB Services Ltd | Administrative & support | 2025 |
| Sloane Gardening Services Limited | Administrative & support | 2014 |
| Smart Glazing London Limited | Construction | 2017 |
| Smart Property Group Limited | Real estate | 2015 |
| Smash CUT Studio Limited | Information & communication | 2022 |
| SMO Secretarial Services Limited | Financial services | 2002 |
| Solvz Ltd | Wholesale & retail | 2023 |
| Sophie Bevan Ltd | Arts & recreation | 2014 |
| Soul Love Empire Ltd | Administrative & support | 2019 |
| Southern Wall Media Ltd | Construction | 2025 |
| Sovereign Hospitaller Order of Saint John of Jerusalem Knights of Malta " Limited | Extraterritorial | 2023 |
| Spring Lane Management Limited | Real estate | 1995 |
| SRI Lanka Schools Old Boys Touch Rugby Union - UK Community Interest Company | Arts & recreation | 2024 |
| ST. Giles Court Management Company Limited | Real estate | 1988 |
| ST. LO Gioiello Limited | Manufacturing | 2019 |
| Stamford Court Management Company (Watlington) Limited | Households | 2006 |
| Stay Gastro Limited | Hospitality | 2016 |
| Steindale Ltd | Real estate | 2019 |
| Stonor Property Investments Limited | Real estate | 2015 |
| Straits Eagle Ltd | Professional & scientific | 2024 |
| Stream Partners Limited | Administrative & support | 2000 |
| Tanner Electrical Contractors Ltd | Construction | 2015 |
| Tanya Beckett Limited | Information & communication | 2006 |
| Taste of Kerala Foods UK Ltd | Manufacturing | 2022 |
| Technology Resources International Limited | Professional & scientific | 2006 |
| Thames Graphic Centre Limited | Real estate | 1984 |
| THE 12 Chairs Limited | Manufacturing | 2018 |
| THE Baytree Holdings Limited | Real estate | 2015 |
| THE Beechwood Estates Co.Limited | Real estate | 1922 |
| THE Beechwood Estates Holdings Company Limited | Real estate | 2020 |
| THE Chiltern Partnership Ltd | Professional & scientific | 1999 |
| THE Gilded Iris Ltd | Hospitality | 2026 |
| THE Granary Cafe Watlington Ltd | Hospitality | 2020 |
| THE Harris Property Company Limited | Real estate | 2003 |
| THE Metabolic Group Ltd | Manufacturing | 2025 |
| THE Nelson Oxon Limited | Hospitality | 2026 |
| THE Orchard Walk 2000 Limited | Real estate | 2000 |
| THE Oxfordshire Branch of the Campaign to Protect Rural England | Other services | 2002 |
| THE Pompomery Limited | Wholesale & retail | 2022 |
| THE Spire and Spoke Ltd | Hospitality | 2020 |
| THE Tree Barn Limited | Wholesale & retail | 2022 |
| THE Turning TOT Ltd | Manufacturing | 2025 |
| Thewitch Ltd | Wholesale & retail | 2024 |
| Thimbles & Threads Ltd | Arts & recreation | 2016 |
| Thistle Thermal Profiling Limited | Administrative & support | 2006 |
| Thomas Fabrications Ltd | Manufacturing | 2002 |
| TIM Carswell Consultancy Ltd | Professional & scientific | 2019 |
| Tiny Shovel LLP | | 2014 |
| Tribehive Limited | Professional & scientific | 2023 |
| Trinity Lifting Apparel Ltd | Wholesale & retail | 2024 |
| Tutu Delicious Chocolates Ltd | Manufacturing | 2022 |
| UK Grand Priory Sovereign Hospitaller Order of ST John of Jerusalem Knights of Malta Limited | Extraterritorial | 2024 |
| Valid Ltd | Information & communication | 2023 |
| VH Consult & Proof Ltd | Professional & scientific | 2025 |
| Vipers Roofing and Property Services Limited | Construction | 2023 |
| Vitalcrown Limited | Real estate | 1987 |
| Voceral Ltd | Professional & scientific | 2005 |
| W31 Limited | Information & communication | 2011 |
| Wallingford Mechanical Services Ltd | Construction | 2021 |
| Watlington and District AGE Concern | Hospitality | 2002 |
| Watlington Pharmacy Ltd | Wholesale & retail | 2009 |
| Watlington Property Ltd | Real estate | 2026 |
| Watlington Sports Club Limited | Arts & recreation | 2025 |
| Watlington Wellness Limited | Real estate | 2025 |
| White Mark Consulting Ltd | Information & communication | 2024 |
| Whitemark Developments Limited | Real estate | 2019 |
| Whitemark Estates Limited | Real estate | 2006 |
| Whitemark Group LLP | | 2018 |
| Whitemark Homes Ltd | Real estate | 2024 |
| Whitemark Mortgages Ltd | Real estate | 2019 |
| Whitemark Properties Ltd | Real estate | 2017 |
| Wildflower Sound Ltd | Information & communication | 2026 |
| Wishdom Productions Ltd | Information & communication | 2023 |
| WJW Consulting Limited | Financial services | 2012 |