| Synatis Limited | Information & communication | 2013 |
| T&H Homes Ltd | Real estate | 2022 |
| T.& H.Price Limited | Agriculture & fishing | 1939 |
| T.D. & C. Kelly Ltd | Construction | 2002 |
| Tadmark Limited | Professional & scientific | 2011 |
| Talacre Estates Limited | Real estate | 1993 |
| Talk of the Town 1 Limited | Hospitality | 2023 |
| Tate Global Solutions (Holdings) Limited | Financial services | 1984 |
| TAW Fasteners Ltd | Wholesale & retail | 2019 |
| TAW Marine Ltd | Wholesale & retail | 2022 |
| Tech 107 Limited | Professional & scientific | 2014 |
| Technical GAS Solutions Ltd | Construction | 2022 |
| Teddy Bear Children Support Ltd | Other services | 2009 |
| Temporary Residential Units Ltd | Manufacturing | 2021 |
| TEN4 Consultancy Ltd | Professional & scientific | 2019 |
| TEN4 Engineering Limited | Real estate | 2013 |
| TEN4 Lettings Ltd | Real estate | 2018 |
| Tenshin Shinyo Consulting Ltd | Information & communication | 2006 |
| Tezeren Limited | Hospitality | 2026 |
| TH Construction Services Ltd | Construction | 2015 |
| THE Atom Works Ltd | Manufacturing | 2024 |
| THE Century Pavilion Ltd | Arts & recreation | 2018 |
| THE Crooked Horn Limited | Hospitality | 2016 |
| THE Deck MAN Ltd | Construction | 2025 |
| THE Feathers NW Limited | Hospitality | 2025 |
| THE Mane Cafe Ltd | Hospitality | 2024 |
| THE Port of Mostyn Limited | Transport & logistics | 1993 |
| THE Ship Inn Greenfield Ltd | Hospitality | 2017 |
| THE Skin Therapist NW Limited | Other services | 2013 |
| THE Village Sports Club Ltd | Education | 2025 |
| THE X-01 Group Limited | Administrative & support | 2025 |
| Thecloudnetwork Ltd | Information & communication | 2024 |
| Thehive Ltd | Professional & scientific | 2026 |
| Thomas Attachments Limited | Wholesale & retail | 2020 |
| Thomas Cabin Hire & Sales Limited | Administrative & support | 2019 |
| Thomas Contracting Limited | Construction | 2002 |
| Thomas Holdings (North West) Limited | Financial services | 2011 |
| Thomas Patrick Associates Limited | Professional & scientific | 2004 |
| Thomas Plant and Body Repairs Limited | Manufacturing | 2016 |
| Thomas Plant Hire Limited | Administrative & support | 2011 |
| Thomas Plant Sales Limited | Wholesale & retail | 2018 |
| Thomas Roofing Limited | Construction | 2013 |
| Thomas Tool Hire Limited | Administrative & support | 1986 |
| Thornton Hough Coffee Shop Limited | Hospitality | 2006 |
| TJG - Transport Limited | Transport & logistics | 2024 |
| Tommik Fabrication & Mechanical Services Ltd | Manufacturing | 2024 |
| Tomos W Griffith Ltd | Professional & scientific | 2022 |
| Tony Davies Ltd | Construction | 2004 |
| Top PEN Y Parc Farm Ltd | Agriculture & fishing | 2021 |
| Toplogic Limited | Transport & logistics | 2014 |
| Tower Eyecare Limited | Wholesale & retail | 2025 |
| Town Lynx Ltd | Transport & logistics | 2012 |
| Trade Valets Ltd | Wholesale & retail | 2018 |
| Trearddur House Mews Management Committee Limited | Households | 1997 |
| Triangle Wood Caravan Sales Limited | Wholesale & retail | 2007 |
| Troy Anaesthetics Ltd | Health & social care | 2020 |
| Truck Align North Wales North West Ltd | Extraterritorial | 2019 |
| UK Effects.Co.Uk Limited | Arts & recreation | 2007 |
| UK Events (NW) Group Ltd | Arts & recreation | 2012 |
| Ultema Consultancy Ltd | Professional & scientific | 2018 |
| Ulterico Limited | Manufacturing | 2013 |
| Ultimate Engineering Solutions Ltd | Professional & scientific | 2005 |
| Urquhart Consulting Ltd | Professional & scientific | 2014 |
| Utility Safety Services Ltd | Information & communication | 2019 |
| V &S Garage Masters Ltd | Other services | 2025 |
| Vaca Ltd | Wholesale & retail | 2023 |
| Vaca Property Group Ltd | Real estate | 2024 |
| Validence Limited | Information & communication | 2026 |
| Valisense Ltd | Professional & scientific | 2025 |
| Vanta Surfacing Ltd | Construction | 2026 |
| Verita Consulting Services Limited | Information & communication | 2005 |
| Verox Ltd | Manufacturing | 2025 |
| Vetri Science Oswestry Ltd | Professional & scientific | 2010 |
| Vetscopic Ltd | Professional & scientific | 2017 |
| Videl-Homes Ltd | Real estate | 2020 |
| VINEYARD72 Front Street Limited | Hospitality | 2026 |
| Voip Gear Ltd | Wholesale & retail | 2019 |
| VSL Laboratories Limited | Professional & scientific | 2011 |
| W & S Residential Properties Limited | Real estate | 2023 |
| W. D. Williams Farms Limited | Agriculture & fishing | 2012 |
| Wagtail (International) Limited | Extraterritorial | 2014 |
| Wagtail Holdings Limited | Financial services | 2017 |
| Wagtail Specialist Dog Services Ltd | Extraterritorial | 2014 |
| Wanagi Limited | Professional & scientific | 2011 |
| Wandering Moments Limited | Health & social care | 2025 |
| Waring Family Investments Limited | Financial services | 2025 |
| Washable Ltd | Information & communication | 2020 |
| Washloo Ltd | Wholesale & retail | 2016 |
| Wayfind Bidco Ltd | Hospitality | 2023 |
| Wayfind Escapes Ltd | Hospitality | 2023 |
| Wayfind Midco Ltd | Hospitality | 2023 |
| Web Pathways CIC | Education | 2026 |
| Wellbro Developments Limited | Construction | 2005 |
| Western Electronics (UK) Limited | Manufacturing | 2006 |
| Whitestone Plumbing & Heating Merchants Limited | Wholesale & retail | 2021 |
| WHO5SJD Ltd | Manufacturing | 2025 |
| Williams Competition Engines Ltd | Administrative & support | 2014 |
| Williams Graig Ltd | Agriculture & fishing | 2026 |
| Williams Racing Ltd | Wholesale & retail | 2011 |
| Windnostics Limited | Professional & scientific | 2016 |