| TAN LAN Bakery Limited | Manufacturing | 2003 |
| TAN Y Bryn Caravan and Camping Limited | Hospitality | 2020 |
| Tassels & Tales Ltd | Wholesale & retail | 2022 |
| Teagan Construction Ltd | Construction | 2024 |
| Tech-Write Ltd | Professional & scientific | 2015 |
| THE Crossings Social Club Ltd | Hospitality | 2020 |
| THE KAY Property Group Limited | Real estate | 2023 |
| THE Motorsport Lounge Limited | Hospitality | 2024 |
| THE Orchard (Llandudno) Limited | Wholesale & retail | 2011 |
| THE Press Room Cafe Limited | Hospitality | 2005 |
| THE Rookie Group Ltd | Administrative & support | 2023 |
| THE Self Tape Gym Limited | Education | 2026 |
| THE Sycamores Pwllycrochan Management Company Limited | Households | 2017 |
| Thomas Automotive Ltd. | Wholesale & retail | 2017 |
| Thomas Rooney Limited | Construction | 2024 |
| Three Point Automotive Limited | Wholesale & retail | 2018 |
| Thrive Creator Group Ltd | Professional & scientific | 2026 |
| Thwindenergy Ltd | Construction | 2017 |
| Tide (NW) Ltd | Wholesale & retail | 2017 |
| Tidel Integrated Services Limited | Information & communication | 2025 |
| TJS Tree and Ground Care Limited | Agriculture & fishing | 2026 |
| TLX (NW) Ltd | Other services | 2025 |
| TOM Usher Limited | Information & communication | 2014 |
| Trematon Estates Limited | Construction | 2010 |
| Tretten Ltd | Information & communication | 2025 |
| Trinity Square Business Centre Ltd | Real estate | 2020 |
| Trisha Ashley Limited | Information & communication | 2011 |
| Tristha Limited | Wholesale & retail | 2026 |
| TT Endurance Coaching Ltd | Arts & recreation | 2023 |
| UK Hospitality Solutions Limited | Hospitality | 2015 |
| Veela Sporting Ltd | Administrative & support | 2025 |
| Victorem Technologies Ltd | Manufacturing | 2025 |
| W R Davies (Stafford) Limited | Wholesale & retail | 2002 |
| W.R. Davies (2OO4) Limited | Wholesale & retail | 2004 |
| W.R. Davies Limited | Wholesale & retail | 1992 |
| W.R.Davies(Motors)Limited | Wholesale & retail | 1938 |
| Watson Renewables Ltd | Manufacturing | 2019 |
| Wavelength Digital Limited | Professional & scientific | 2017 |
| WE ARE Fuego Limited | Information & communication | 2014 |
| Websprite Software Ltd | Information & communication | 2018 |
| West Shore Properties Limited | Real estate | 2011 |
| Wiflow Limited | Hospitality | 2025 |
| Willowsmere Management Limited | Real estate | 1991 |
| Worldcare Recycling Limited | Water & waste | 2015 |
| Worthy Medic Limited | Education | 2015 |
| X Xander Limited | Other services | 2021 |
| Yates Renewable Energies Limited | Construction | 2006 |
| Ysgethin Inn Limited | Hospitality | 2017 |
| Zakora Limited | Construction | 2009 |
| Zilla Developments Ltd | Real estate | 2021 |
| Zilla Holdings Ltd | Professional & scientific | 2017 |