| THE Tottman Group Limited | Education | 2017 |
| THE Tracery RTM Company Limited | Households | 2004 |
| THE Trade Mark Surrey Hills Ltd | Professional & scientific | 2019 |
| THE Tree Associates (Surrey) Limited | Agriculture & fishing | 2017 |
| THE Ultimate Boyband Party Show Ltd | Arts & recreation | 2023 |
| THE Vernon Educational Trust Limited | Education | 1974 |
| THE Visitors Films Ltd | Information & communication | 2023 |
| THE Ward Office Ltd | Administrative & support | 2025 |
| THE Wildlife AID Foundation | Other services | 2009 |
| THE Yacht Vault Limited | Administrative & support | 2022 |
| THE Yarrandale Group Ltd | Real estate | 2020 |
| Themis Group Consulting Ltd | Real estate | 2025 |
| Think VC Partners LLP | | 2025 |
| Thinkanew Media Ltd | Information & communication | 2010 |
| Thomas,Arthur & Gordon,Limited | Real estate | 1946 |
| Thomson Geospatial Ltd | Professional & scientific | 2021 |
| Thorncroft Management Company Limited | Households | 2000 |
| Thorne George Limited | Professional & scientific | 1988 |
| Thpt Services Limited | Education | 2015 |
| Three BS Swimschool Ltd | Education | 2022 |
| Three Cheetahs Limited | Real estate | 2021 |
| Three Fields Entertainment Limited | Information & communication | 2014 |
| Three Sisters Publishing Limited | Information & communication | 2019 |
| Throwing Stones Ltd | Information & communication | 2016 |
| Thumwood Property Limited | Construction | 2016 |
| Tiara Property Ltd | Real estate | 2022 |
| Tiki Tiki Ltd | Hospitality | 2019 |
| Tilt House Management Company Limited | Households | 2005 |
| Timberwood Tree Care Limited | Agriculture & fishing | 2014 |
| Timeandtime Ltd | Information & communication | 2019 |
| Timothy Hobbs Landscape Gardener Limited | Administrative & support | 2015 |
| Tintalow Holdings Limited | Financial services | 2023 |
| Tippzi Ltd | Information & communication | 2017 |
| Tiptop Computers Limited | Information & communication | 2005 |
| Tiptop Group Ltd | Financial services | 2017 |
| Tiptop Networks Limited | Information & communication | 2016 |
| Titan Investment Holdings Ltd | Real estate | 2021 |
| Titi Finlay Ltd | Arts & recreation | 2021 |
| TJK Software Ltd | Information & communication | 2013 |
| Tlab Global Ltd | Professional & scientific | 2021 |
| TLL Financial Limited | Financial services | 2014 |
| TMA (Europe) Ltd | Other services | 2011 |
| TNB Building Services Ltd | Construction | 2021 |
| TOA Corporation (UK) Limited | Wholesale & retail | 1983 |
| Toasted Crumpet Holdings Limited | Wholesale & retail | 2023 |
| Tomea Advisory Ltd | Professional & scientific | 2025 |
| Tonsley Limited | Real estate | 2006 |
| Tony Property Maintenance Ltd | Construction | 2014 |
| Torrington Coastal Restorations Limited | Manufacturing | 2012 |
| Torrington Heritage Transport Fabrics Ltd | Wholesale & retail | 2020 |
| Torrivale Limited | Construction | 2006 |
| Total Reclamation Limited | Construction | 2010 |
| Touch Tree Technology Limited | Information & communication | 2023 |
| Touchdown Films Ltd | Information & communication | 2016 |
| Touchless Wellness Ltd | Other services | 2023 |
| Touchtennis Ltd | Wholesale & retail | 2019 |
| Tour DE Force Cycling Limited | Administrative & support | 2011 |
| Town House Employment Services Limited | Administrative & support | 2020 |
| Townhall Production Ltd | Other services | 2024 |
| Towtech Masters Limited | Wholesale & retail | 2025 |
| TP Improvements Ltd | Construction | 2018 |
| Tradeaire Ltd | Information & communication | 2025 |
| Transform Housing & Support | Hospitality | 1972 |
| Transitions Consulting Limited | Professional & scientific | 2014 |
| Travelsnug Limited | Wholesale & retail | 2013 |
| Traynor Ventures Ltd | Professional & scientific | 2025 |
| TRB Garden Solutions Limited | Administrative & support | 2010 |
| Treat Homes Limited | Real estate | 2017 |
| Treat Limited | Health & social care | 1994 |
| Treble B Management Limited | Professional & scientific | 2006 |
| Treeline Chalets Ltd | Hospitality | 2009 |
| Treetops (Southdowns Park) Management Company Limited | Households | 2016 |
| Treetops and High Gate Management Ltd | Households | 2018 |
| Trenbridge Estates Limited | Real estate | 1993 |
| Triangle Express Ltd | Wholesale & retail | 2023 |
| Trick Trick Boom Ltd | Arts & recreation | 2023 |
| Triple I Construction Limited | Manufacturing | 2026 |
| Triple O Creations Ltd | Wholesale & retail | 2025 |
| Tristan Bonsall Contracting Ltd | Information & communication | 2023 |
| Triton+ Ltd | Transport & logistics | 2011 |
| Triumph MSG UK Limited | Manufacturing | 2025 |
| TRM Consultancy Services Ltd | Professional & scientific | 2010 |
| Troika Analytics Ltd | Information & communication | 2024 |
| True Review Tribe Ltd | Information & communication | 2025 |
| True Unity Limited | Wholesale & retail | 2017 |
| Truly Developments Ltd | Real estate | 2026 |
| Trusted Agents Ltd | Information & communication | 2025 |
| TSJ Accountants Limited | Real estate | 2013 |
| Tuff Nutterz Ltd | Arts & recreation | 2022 |
| Tunsgate (West END) Limited | Construction | 2023 |
| Tunsgate ASH Road Ltd | Construction | 2021 |
| Tunsgate Commercial Ltd | Construction | 2015 |
| Tunsgate Group Ltd | Financial services | 2020 |
| Tunsgate Holdings Ltd | Construction | 2016 |
| Tunsgate Homes Limited | Construction | 2012 |
| Tunsgate Send Ltd | Construction | 2021 |
| Turner Global Ltd | Professional & scientific | 2025 |
| Turnpike Close Residents Limited | Households | 2025 |
| Tweak Marketing Ltd | Professional & scientific | 2011 |
| Tweeters Ltd | Information & communication | 2009 |