| Sunderland Brothers Limited | Construction | 2008 |
| Supplies for Schools Limited | Wholesale & retail | 2004 |
| Sure City Limited | Administrative & support | 2007 |
| SV Arena Limited | Hospitality | 2023 |
| Sylvan Vale Limited | Real estate | 1983 |
| Syncro Inc. Limited | Manufacturing | 2021 |
| T & W Commercials Limited | Real estate | 2018 |
| T S E Projects Limited | Real estate | 2014 |
| T Timing Limited | Other services | 2013 |
| T&S T/A Spar Stores Montgomery Ltd | Wholesale & retail | 2019 |
| T. Morrish Ltd | Manufacturing | 2020 |
| T6 Harvard Ltd | Transport & logistics | 2019 |
| TA Trading Ltd | Wholesale & retail | 2025 |
| Tabilo Furniture Holdings Ltd | Financial services | 2020 |
| Tabilo Furniture Limited | Administrative & support | 2010 |
| Tarakona Ltd | Administrative & support | 2016 |
| Taranis Special Projects Ltd | Education | 2026 |
| Taste Merchants (Group) Ltd | Financial services | 2021 |
| Taste Merchants Ltd | Wholesale & retail | 2015 |
| TB Audio Solutions Ltd | Administrative & support | 2024 |
| Team Elite Limited | Construction | 2014 |
| TEC Construction Projects Limited | Administrative & support | 2021 |
| TEG Construction (UK) Ltd | Construction | 2021 |
| Tepo Limited | Professional & scientific | 2012 |
| Terra Firm Trident UK Ltd | Professional & scientific | 2025 |
| Textile Junkies Ltd | Education | 2021 |
| TF1 Gym Limited | Arts & recreation | 2020 |
| TGW Risk Management Ltd | Administrative & support | 2016 |
| THE Brew Hub (13) Limited | Wholesale & retail | 2022 |
| THE Cool Baby Company Ltd | Wholesale & retail | 2023 |
| THE Cool Hamper Company Ltd | Wholesale & retail | 2022 |
| THE Crop Shop Limited | Other services | 2023 |
| THE Dairy Management Company Limited | Real estate | 2004 |
| THE Disruptive Innovator Ltd | Information & communication | 2016 |
| THE Dolfor Inn Ltd | Hospitality | 2022 |
| THE Evohome Shop Limited | Extraterritorial | 2014 |
| THE Forest Kerry Limited | Hospitality | 1997 |
| THE Gadget Gaff Ltd | Wholesale & retail | 2020 |
| THE Game Change Project CIC | Education | 2019 |
| THE Gregynog Festival Company Limited | Arts & recreation | 1988 |
| THE Llethrau-Forest and Nature Retreats Ltd. | Extraterritorial | 1965 |
| THE Ontrac Agency Limited | Professional & scientific | 2000 |
| THE Patch & STY Ltd | Agriculture & fishing | 2023 |
| THE Power of Health Limited | Arts & recreation | 2017 |
| THE Power of Movement CIC | Arts & recreation | 2025 |
| THE Riverside Bookshop Limited | Wholesale & retail | 1987 |
| THE Sarn Inn Limited | Hospitality | 2023 |
| THE Savage Bull Ltd | Professional & scientific | 2023 |
| THE Severnside Limited Partnership | | 2014 |
| THE Smart Thermostat Shop Limited | Extraterritorial | 2016 |
| THE Unicorn Hotel (Llanidloes) Limited | Hospitality | 2025 |
| THE Witch of the Willows Ltd | Wholesale & retail | 2020 |
| Three Sixty Optical Limited | Administrative & support | 2014 |
| Three Sixty UK Holdings Ltd | Financial services | 2019 |
| Tinkit Limited | Manufacturing | 2024 |
| Total ARB Solutions Ltd | Professional & scientific | 2013 |
| TPG Wind Limited | Energy | 1992 |
| Traditional Oak Build UK Limited | Construction | 2007 |
| Trannon Valley Ltd | Agriculture & fishing | 2014 |
| Trax J H Limited | Manufacturing | 1992 |
| TRE Consulting Limited | Professional & scientific | 2012 |
| Trevoil Farms Limited | Agriculture & fishing | 2016 |
| TSE Contractors Limited | Construction | 2014 |
| Tucker Limited | Administrative & support | 2004 |
| TWENTY20ONE Limited | Wholesale & retail | 2015 |
| Tyler-Waddington Limited | Professional & scientific | 1995 |
| Ubique Associates Ltd | Administrative & support | 2018 |
| Ultraflux NDT Ltd | Professional & scientific | 2021 |
| Unite Components Limited | Information & communication | 2014 |
| Universal Fire Protection Limited | Construction | 2008 |
| Untold Collective Ltd | Information & communication | 2023 |
| Upflight UAV Limited | Professional & scientific | 2019 |
| Upper Gwestydd Holdings Limited | Professional & scientific | 2019 |
| Upper PEN Y Gelli Farm Management Company Limited | Real estate | 2019 |
| Urban Escapes Ltd | Administrative & support | 2008 |
| Urban Sky Digital Limited | Professional & scientific | 2023 |
| Usgc Holdings Ltd | Other services | 2023 |
| Valentine Court a Management Company Limited | Real estate | 2019 |
| Valorous Group Brokerage Ltd | Financial services | 2022 |
| Valorous Group Ltd | Administrative & support | 2017 |
| Valtaris Limited | Information & communication | 2008 |
| Vanguard Recruitment and Solutions Ltd | Professional & scientific | 2025 |
| Vanity WP Ltd | Other services | 2024 |
| Varley's of Newtown Ltd. | Wholesale & retail | 2004 |
| Vastre Properties Limited | Construction | 2023 |
| Vaynor Stores Limited | Wholesale & retail | 2002 |
| VCC Holdings Limited | Financial services | 2025 |
| Vector Designs Ltd | Arts & recreation | 2024 |
| Vesna Ventures Ltd | Hospitality | 2025 |
| Viking Motorsport Limited | Manufacturing | 2008 |
| Vintage Voltage Ltd | Wholesale & retail | 2020 |
| Vittoria Greens Ltd | Agriculture & fishing | 2025 |
| Volla Logistics Ltd | Transport & logistics | 2023 |
| Vortyx Laser Ltd | Manufacturing | 2026 |
| W Squared Strategy Limited | Professional & scientific | 2024 |
| Waggon and Horses (Newtown) Limited | Hospitality | 2009 |
| Warner Jones Limited | Construction | 2013 |
| Watkins Farms Limited | Wholesale & retail | 2016 |
| WE SAY Grow Ltd | Wholesale & retail | 2025 |
| Weld-Eng Consultants Ltd | Professional & scientific | 2012 |