| THE Diet Revolution Limited | Hospitality | 2019 |
| THE Dominoes Sport & Performing Arts CIC | Hospitality | 2024 |
| THE Fountain Tea Rooms Limited | Wholesale & retail | 2011 |
| THE FOX and Hounds (Llancarfan) Limited | Hospitality | 2022 |
| THE Gallery by Heroes Rights Ltd | Hospitality | 2021 |
| THE Grafters Holdings Limited | Financial services | 2025 |
| THE Great British Van Ltd | Hospitality | 2021 |
| THE Green Factor Limited | Administrative & support | 2004 |
| THE Groundsman Garden Maintenance Ltd | Administrative & support | 2023 |
| THE Heavenly Vegan Ltd | Wholesale & retail | 2023 |
| THE Holton Stores Ltd | Wholesale & retail | 2026 |
| THE Indy Buyer Limited | Professional & scientific | 2025 |
| THE Knotty Yachty Limited | Wholesale & retail | 2025 |
| THE Lake Shop Ltd | Wholesale & retail | 2025 |
| THE Laundry Room Services Ltd | Other services | 2018 |
| THE Living Room Collective Community Interest Company | Hospitality | 2026 |
| THE Market Street Club Limited | Hospitality | 2011 |
| THE Natural Face(Uk) Limited | Health & social care | 2004 |
| THE Nibblers Limited | Other services | 2010 |
| THE Orange Blossom Group Limited | Wholesale & retail | 2020 |
| THE Padel HYB CIC | Arts & recreation | 2026 |
| THE Pencil Case Cowbridge Limited | Wholesale & retail | 2014 |
| THE Perfect Practice Limited | Professional & scientific | 2014 |
| THE Pooch House Ltd | Other services | 2023 |
| THE Priority Organisation Limited | Construction | 2017 |
| THE Property Bureau (Wales) Limited | Real estate | 2006 |
| THE Property Bureau Wales (Lettings) Limited | Real estate | 2006 |
| THE Quiet Coach Ltd | Health & social care | 2025 |
| THE Residential Investment Company Limited | Real estate | 2003 |
| THE Residential Trading Company Limited | Real estate | 2016 |
| THE Revived Motors Ltd | Wholesale & retail | 2026 |
| THE Rose Project by Catalina Ltd | Other services | 2023 |
| THE Sausage Revolution Limited | Manufacturing | 2015 |
| THE Scran Van CF11 Ltd | Hospitality | 2025 |
| THE Secret Garden (Barry) Ltd | Other services | 2023 |
| THE South Wales Foot Clinic Limited | Health & social care | 2015 |
| THE Stone Cleaning U.K. Company Ltd | Administrative & support | 2018 |
| THE Stove Room Cardiff Ltd | Wholesale & retail | 2021 |
| THE Uplifting Clinic Ltd | Health & social care | 2016 |
| THE Vale Foot Clinic Ltd | Health & social care | 2024 |
| THE Vale Motor Company Ltd | Wholesale & retail | 2014 |
| THE Vinyl Frontier Ltd | Wholesale & retail | 2015 |
| THE W+J Workshop Ltd | Wholesale & retail | 2021 |
| THE Waterfront Dental Surgery Limited | Health & social care | 2016 |
| THE Windsor Court (Barry) Management Company Limited | Households | 2007 |
| The-Afters-Party-Services Ltd | Administrative & support | 2021 |
| Thermonuclear Limited | Construction | 2023 |
| Thinkvans.Com Limited | Wholesale & retail | 2008 |
| This Fruita UK Limited | Wholesale & retail | 2025 |
| Thomas COX Limited | Administrative & support | 2019 |
| Thompson Street Barry Properties Ltd | Real estate | 2022 |
| Thomson and SON Holdings Limited | Professional & scientific | 2005 |
| Ticketyboo Holdings Ltd | Hospitality | 2023 |
| TIM Hayward Car Sales Limited | Wholesale & retail | 2017 |
| Timber Heritage Ltd | Manufacturing | 2025 |
| Timbermart (UK) Limited | Wholesale & retail | 1987 |
| Time Flies Trading LLP | | 2024 |
| Timeslave Recordings Limited | Information & communication | 2017 |
| Tiny DIY Ltd | Construction | 2024 |
| Tiny Tides Play CIC | Other services | 2025 |
| Tiny Trends Ltd | Wholesale & retail | 2021 |
| Tiq-Toq (EOT) Trustee Limited | Administrative & support | 2025 |
| Tiq-Toq Ltd | Information & communication | 2016 |
| Titan Express Food Ltd | Hospitality | 2026 |
| Titan Express UK Ltd | Wholesale & retail | 2018 |
| Tiwlip Ltd | Wholesale & retail | 2025 |
| TJ Window Installations Ltd | Construction | 2020 |
| TJG Developments (Whips) Limited | Construction | 2024 |
| TJG Developments Limited | Extraterritorial | 2024 |
| TJG Enterprises Limited | Construction | 2011 |
| TK Commerce Limited | Wholesale & retail | 2023 |
| TKA Property Ltd | Real estate | 2023 |
| TLS (Cymru) Ltd | Construction | 2009 |
| Tony Gale Cleantech Consultants Ltd | Professional & scientific | 2013 |
| Tooled UP Education Ltd | Information & communication | 2018 |
| Top CUT Burning Limited | Construction | 2026 |
| Top PUB Co Ltd | Hospitality | 2021 |
| Top Recovery Ltd | Manufacturing | 2025 |
| Toplake Limited | Real estate | 2022 |
| Toshtek Ltd | Wholesale & retail | 2011 |
| Total Ground Support Ltd | Administrative & support | 2023 |
| Total Motor Mart Ltd | Wholesale & retail | 2025 |
| Tovey-Mae Inns Limited | Hospitality | 2020 |
| Toyshed Ltd | Real estate | 2022 |
| TR2024 Limited | Hospitality | 2024 |
| Track and Train Play Ltd | Arts & recreation | 2025 |
| Trade & Treats Limited | Wholesale & retail | 2025 |
| Tradeala Ltd | Financial services | 2025 |
| Trails of the Vale Ltd | Agriculture & fishing | 2026 |
| Transitional Solutions Ltd | Hospitality | 2017 |
| Transport Auditing and Compliance Services Limited | Transport & logistics | 2024 |
| Travel Beyond Global Limited | Professional & scientific | 2025 |
| Travel Shadows Ltd | Administrative & support | 2025 |
| Treading the Boards Theatre Company CIC | Arts & recreation | 2024 |
| Tree Law Ltd | Professional & scientific | 2021 |
| Treharne Property Investments Limited | Real estate | 2021 |
| Trikon DEV Ltd | Construction | 2023 |
| Trojan BMS Systems Ltd | Professional & scientific | 2021 |
| Trojan Electrical Services Ltd | Construction | 2024 |
| TRU Haven Ltd | Real estate | 2024 |