| THE Long Way Productions UK Ltd | Information & communication | 2025 |
| THE Mountaineering Company Ltd | Other services | 2024 |
| THE Oakwood View Management Company Limited | Households | 2004 |
| THE Peppermill (Conwy) Ltd | Hospitality | 2024 |
| THE Steadlings Residents Co Ltd | Households | 2002 |
| THE Tower Coffee House Ltd | Hospitality | 2021 |
| Thomas Jones (Llandudno) Limited | Construction | 1958 |
| Tilstone Limited | Hospitality | 2024 |
| TMC Protrek Limited | Arts & recreation | 2025 |
| TOM Owen and SON (Llandudno) Limited | Other services | 1963 |
| Towers Estates Management Limited | Real estate | 1994 |
| Towers Management (Llandudno) Limited | Households | 1998 |
| TP Tank Services Limited | Professional & scientific | 2024 |
| Trancio Ltd | Hospitality | 2023 |
| Trinity Apts (Llandudno) MAN Co Limited | Real estate | 2020 |
| Trinity Goods Ltd | Hospitality | 2013 |
| Tvconwy Community Interest Company | Information & communication | 2013 |
| TWF Consulting CYF | Professional & scientific | 2026 |
| TYN Y Coed Cottages Ltd | Hospitality | 2026 |
| Tynedale Hotel Limited | Hospitality | 2002 |
| UK2 Travel Ltd | Administrative & support | 2011 |
| Ultimate Robo Limited | Financial services | 2015 |
| Valves Direct Ltd | Wholesale & retail | 2019 |
| Vardre Property Management Limited | Real estate | 2019 |
| Vectorex Construction Limited | Construction | 2013 |
| Vectorex Holdings Limited | Financial services | 2022 |
| Vertex NW Access Ltd | Construction | 2025 |
| Vetramed Supplies Limited | Wholesale & retail | 2025 |
| Victoria Court (Llanrwst) Management Company Limited | Administrative & support | 2008 |
| Victoria Terrace (Beaumaris) Limited | Real estate | 1982 |
| Vinomondo Limited | Wholesale & retail | 2012 |
| Viremont Capital Ltd | Financial services | 2026 |
| Warm Homes Energy Group Ltd | Construction | 2021 |
| Warm Homes Group Ltd | Other services | 2022 |
| Water Edge (Llandudno) Management Company Limited | Households | 2010 |
| Waterbrook House (Devizes) NO. 4 Management Limited | Hospitality | 1993 |
| Watermill Leisure Park Limited | Administrative & support | 2016 |
| Webb Engineering Services Ltd | Professional & scientific | 2024 |
| West Mains Court Limited | Households | 1982 |
| Whelan Services Ltd | Construction | 2024 |
| White Bakery Ltd. | Manufacturing | 2017 |
| Williams Land Surveys Ltd | Professional & scientific | 2025 |
| Wincaster Management Company Limited | Households | 1987 |
| Worthy Hairdressing Ltd | Other services | 2020 |
| Wynex Repair Ltd | Construction | 2018 |
| X Factory Outlet Ltd | Manufacturing | 2023 |
| Y BAE Management Company Limited | Households | 2012 |
| Yacht Carbon Offset Limited | Professional & scientific | 2007 |
| YE Old Mail Coach Ltd | Hospitality | 2019 |
| York Court (Deganwy) Management Comany Limited | Households | 2008 |
| YOU Need 3D Ltd | Information & communication | 2020 |