| Swatu Ltd | Professional & scientific | 2023 |
| Swissimpact UK Ltd | Extraterritorial | 2016 |
| Swissukcapitalpartners Ltd | Financial services | 2017 |
| Swissxtreme Properties Ltd | Real estate | 2018 |
| SWL Locations Ltd | Real estate | 2024 |
| SWL Residences Ltd | Real estate | 2024 |
| Sydenham House(Surbiton)Residents Association Limited | Households | 1964 |
| Sydney Stones Care and Support Services Ltd | Health & social care | 2018 |
| Synvios Projects Limited | Professional & scientific | 2023 |
| T Hymers Property Consultants Ltd | Professional & scientific | 2022 |
| T J Parker Electrician Ltd | Construction | 2012 |
| T. J. H. Admin Services Limited | Professional & scientific | 2011 |
| Tactical Employment Solicitors Limited | Professional & scientific | 2014 |
| Taggs Island Limited | Real estate | 1979 |
| Taiwan Travel Limited | Administrative & support | 2012 |
| Tallboy Communications Ltd | Information & communication | 2003 |
| Tanama Ltd | Real estate | 2017 |
| Target Realty Limited | Real estate | 2021 |
| Tartan Jelly Ltd | Real estate | 2016 |
| Tavallai-Dixon Ltd | Real estate | 2020 |
| Tavern Equipment Limited | Wholesale & retail | 1990 |
| Tawadrous Consulting Limited | Professional & scientific | 2015 |
| Tax Accountants (Hampton) Limited | Professional & scientific | 2018 |
| TBC Investment Homes Ltd | Real estate | 2019 |
| Tbgs Global Limited | Information & communication | 2023 |
| TCA Property Limited | Professional & scientific | 1998 |
| Tea Plus ME Limited | Hospitality | 2018 |
| Team Vleenam Ltd | Information & communication | 2026 |
| Tech Recovery Limited | Other services | 2021 |
| Technical Lamps Limited | Wholesale & retail | 1984 |
| Teddington RFC Limited | Arts & recreation | 2011 |
| Teddington Tennis Grounds Limited | Real estate | 1928 |
| Teddington Theatre Club Limited | Arts & recreation | 1968 |
| Teddington Town Sports Club Limited | Arts & recreation | 2014 |
| Teddy Waffliest Limited | Professional & scientific | 2025 |
| Telford Avenue Residents Limited | Households | 1998 |
| TEN Craven Street WC2 Residents Company Limited | Households | 1984 |
| Terra Build Services Ltd | Administrative & support | 2020 |
| Terrier Design and Build Limited | Construction | 2012 |
| Tesla Properties Limited | Real estate | 2016 |
| Tessox Ltd | Wholesale & retail | 2024 |
| Testlogic Consultancy (UK) Ltd | Information & communication | 2018 |
| Textile Flooring Specialists Ltd | Wholesale & retail | 2021 |
| TH Consulting Limited | Information & communication | 2003 |
| Thai Kitchen Hampton Hill Ltd | Hospitality | 2026 |
| Thames Community Hydro CIC | Energy | 2023 |
| Thames Reach Management Company Limited | Households | 1999 |
| Thames Renewable Energy Ltd | Professional & scientific | 2002 |
| That Car GUY Ltd | Manufacturing | 2021 |
| THE Accountancy Business Limited | Professional & scientific | 1999 |
| THE Archadia Practice (London) Limited | Extraterritorial | 1999 |
| THE Ayurveda Practice Ltd | Health & social care | 2021 |
| THE Baylie Estates Ltd | Real estate | 2024 |
| THE Beauty Way Project Community Interest Company | Education | 2026 |
| THE Bluefield Centre for Biomaterials Limited | Professional & scientific | 2015 |
| THE Colour Box Montessori Nursery School Ltd | Education | 2009 |
| THE Comms Laboratory Ltd | Professional & scientific | 2024 |
| THE Conference Office Limited | Real estate | 2002 |
| THE Consumer Watchdog Ltd | Information & communication | 2015 |
| THE Creative Clan Group Ltd | Professional & scientific | 2021 |
| THE Digital Space Consultancy Ltd | Professional & scientific | 2022 |
| THE Fightback Brewing Company Limited | Wholesale & retail | 2018 |
| THE Fitzwygram Foundation | Education | 2016 |
| THE Gensight Group Limited | Information & communication | 2002 |
| THE Globe Players | Arts & recreation | 2009 |
| THE Good Church CIC | Other services | 2026 |
| THE Good Skin Company (UK) Limited | Health & social care | 2016 |
| THE Great and the Good Limited | Administrative & support | 2013 |
| THE Growth Path Limited | Professional & scientific | 2024 |
| THE Hampton Flooring Company Limited | Wholesale & retail | 2002 |
| THE Hampton Hampers Company Limited | Hospitality | 2001 |
| THE Hamptons Design & Build Limited | Real estate | 2020 |
| THE Hamptons Handyman Ltd | Administrative & support | 2026 |
| THE Hatch Property Investment Ltd | Real estate | 2019 |
| THE Horse Rangers Association (Hampton Court) Limited | Arts & recreation | 2003 |
| THE Interplay Agency Ltd | Professional & scientific | 2017 |
| THE Kitchen Republic Ltd | Hospitality | 2026 |
| THE Lady Eleanor Holles School | Education | 2009 |
| THE Lady Eleanor Holles School International Limited | Education | 2016 |
| THE Learning Curve Tuition Ltd | Education | 2026 |
| THE Lease Loop Limited | Financial services | 2000 |
| THE Leather Print Company Limited | Wholesale & retail | 2012 |
| THE Little Top Limited | Arts & recreation | 2014 |
| THE London Sashsmith Limited | Construction | 2017 |
| THE Luol Deng Foundation UK | Arts & recreation | 2009 |
| THE Modified Furniture Group Limited | Manufacturing | 2023 |
| THE OBI, Kyoto Ltd | Wholesale & retail | 2024 |
| THE Old Dairy (Hampton) Management Company Limited | Households | 2014 |
| THE Oriels (Merton Park) Residents Company Limited | Households | 1996 |
| THE Piri & Co. Ltd | Hospitality | 2025 |
| THE Plantain Shop Ltd | Manufacturing | 2019 |
| THE Prime Builders & Renovation Ltd | Construction | 2025 |
| THE Ragged House Ltd | Households | 2013 |
| THE Samstha Ltd | Real estate | 2023 |
| THE Shooting Star Trust | Health & social care | 2002 |
| THE Smile Gallery Holdings Ltd | Construction | 2020 |
| THE Smile Gallery Limited | Health & social care | 2013 |
| THE Storage Bay Limited | Wholesale & retail | 2009 |
| THE Sync Agency (Music) Limited | Administrative & support | 2009 |
| THE Synchronicity Space Ltd | Health & social care | 2025 |