| Stoves and Fuels Limited | Construction | 2019 |
| Strartegy Limited | Other services | 2025 |
| Student Digs Ltd | Information & communication | 2020 |
| Studio Humbug Ltd | Wholesale & retail | 2014 |
| Studio Munki Ltd | Professional & scientific | 2022 |
| Su's Taxis Limited | Transport & logistics | 2014 |
| Sue's Taxis (Abingdon) Limited | Transport & logistics | 2021 |
| Sunflower Carriages Ltd | Wholesale & retail | 2018 |
| Sunflower Property Management Limited | Real estate | 2025 |
| Sunflower Solution Services Ltd | Professional & scientific | 2024 |
| SUPERCHARG3D Management Services Ltd | Professional & scientific | 2022 |
| Swain Projects and Consultancy Limited | Professional & scientific | 2010 |
| Swanstar Trading Limited | Other services | 2018 |
| Sweet & Toastie LLP | | 2026 |
| SYP Properties Ltd | Real estate | 2019 |
| System Workshop Ltd | Information & communication | 2021 |
| Tacusci Ltd | Information & communication | 2018 |
| Talent Pipeline Ltd | Administrative & support | 2024 |
| Talking Travel Writing LLP | | 2025 |
| Taramy Ltd | Professional & scientific | 2026 |
| Tawallingford LLP | | 2024 |
| Taylor Consulting Engineers Ltd | Professional & scientific | 2021 |
| TDW8 Limited | Arts & recreation | 2025 |
| Team UP for Social Mobility Limited | Education | 2012 |
| Teammate Roomware Solutions Limited | Professional & scientific | 2018 |
| Teamwell Limited | Professional & scientific | 2022 |
| Techfabrica IT Support Solutions Limited | Administrative & support | 2019 |
| Tekram Ltd | Hospitality | 2001 |
| Tekstar Limited | Professional & scientific | 2005 |
| Temar Systems Limited | Professional & scientific | 2004 |
| Ten-K Electronic Services Limited | Manufacturing | 2013 |
| Tewkesbury Unit 18 Limited Partnership | | 2026 |
| TFG (Group) Limited | Professional & scientific | 2006 |
| Thames Air Conditioning Limited | Professional & scientific | 2006 |
| Thames Compressed Air Services Limited | Professional & scientific | 2006 |
| Thames Construction & Renovations Ltd | Construction | 2010 |
| Thames Property Investments Limited | Real estate | 2002 |
| Thames Valet Ltd | Wholesale & retail | 2009 |
| Thames Valley Accounting LLP | | 2025 |
| Thames Valley Bookkeeping LLP | | 2024 |
| Thames Valley DRY Cleaning Ltd | Other services | 2025 |
| Thamesdale Ltd | Professional & scientific | 2026 |
| Thatched Cottage Ltd | Real estate | 2024 |
| THE Adventurous GP Ltd | Health & social care | 2016 |
| THE Aroma Company (Europe) Ltd. | Professional & scientific | 1996 |
| THE Atlantic Bar (Polzeath) Limited | Hospitality | 2019 |
| THE Bach Centre Mount Vernon Limited | Other services | 1993 |
| THE Body Training Studio Limited | Arts & recreation | 2012 |
| THE Bookbinding Studio Limited | Manufacturing | 2026 |
| THE Booys Ltd | Construction | 2025 |
| THE Breathable House Company Ltd | Construction | 2021 |
| THE Brit M Company Limited | Construction | 2023 |
| THE Buckinghamshire Historic Buildings Trust | Other services | 1983 |
| THE Butterfly Community Café C.I.C. | Hospitality | 2021 |
| THE CAC Dealer Ltd | Professional & scientific | 2025 |
| THE Caledonia Rosyth Limited Partnership | | 2023 |
| THE Camel's Back Limited | Professional & scientific | 2012 |
| THE Coaching Barn Ltd | Arts & recreation | 2018 |
| THE Cookhouse Deli Ltd | Wholesale & retail | 2016 |
| THE Coral Production Ltd | Professional & scientific | 2021 |
| THE Curated Nest Ltd | Wholesale & retail | 2025 |
| THE Discovery DEN Ltd | Education | 2021 |
| THE Dolphin Wallingford Ltd | Hospitality | 2025 |
| THE Drunken Apothecary Ltd | Hospitality | 2025 |
| THE Elysian Collective Ltd | Wholesale & retail | 2023 |
| THE Exercise Lounge Wallingford Ltd | Arts & recreation | 2024 |
| THE FDL PUB Ltd | Hospitality | 2020 |
| THE Forensic Training Partnership C.I.C. | Public administration | 2023 |
| THE Full Circle Travel Collection Limited | Administrative & support | 2025 |
| THE Funky Duck Company Ltd | Wholesale & retail | 2022 |
| THE Garden Bakehouse Limited | Professional & scientific | 2019 |
| THE Garden Practice Ltd | Administrative & support | 2017 |
| THE Garden Room & Conservatory Company Limited | Professional & scientific | 1995 |
| THE Great Taste Company Limited | Administrative & support | 2010 |
| THE Harcourt Flooring Company Ltd | Wholesale & retail | 2016 |
| THE Heron's Hoard Limited | Wholesale & retail | 2025 |
| THE Horticulture Group Limited | Wholesale & retail | 2020 |
| THE Huang's Enterprise Limited | Real estate | 2012 |
| THE Judd Management Partnership | | 2008 |
| THE Keep Spirits Co. Ltd | Wholesale & retail | 2020 |
| THE Launton Property Company Ltd | Real estate | 2017 |
| THE Little Neighbourhood PUB Company Limited | Hospitality | 2014 |
| THE Lost Boys Detective Agency Limited | Professional & scientific | 2016 |
| THE Lyons Consultancy Limited | Professional & scientific | 1995 |
| THE Merchant Taylors' Oxfordshire Academy Trust Ltd | Education | 2011 |
| THE Mews Shillingford M'Ment Co Ltd | Real estate | 2009 |
| THE Microsampling Laboratory Ltd | Professional & scientific | 2018 |
| THE Mongewell's Lake Company Limited | Extraterritorial | 2012 |
| THE Naughty Nagg Limited | Administrative & support | 2022 |
| THE New Wavin Ltd | Transport & logistics | 2025 |
| THE Nootropics Store Ltd | Wholesale & retail | 2025 |
| THE Old Bakery Dental Practice Limited | Extraterritorial | 2010 |
| THE Old Forge (Dorchester-On-Thames) Management Company Limited | Administrative & support | 1996 |
| THE Original Brewing Company Limited | Manufacturing | 2026 |
| THE Original Synn Limited | Professional & scientific | 2022 |
| THE OX Shed Ltd | Hospitality | 2019 |
| THE Oxford Lucky Chimney Sweep Limited | Administrative & support | 2014 |
| THE Oxford Yurt Limited | Hospitality | 2016 |
| THE Real Mini Company Limited | Wholesale & retail | 2023 |
| THE Reporter Ltd | Information & communication | 2025 |