| THE Render Depot Ltd | Wholesale & retail | 2016 |
| THE Tree Fellas South Wales Ltd | Extraterritorial | 2021 |
| THE Tynte Hotel Ltd | Hospitality | 2018 |
| THE Valleys Scaffolding Limited | Construction | 2025 |
| THE WIN Consultancy Ltd | Construction | 2022 |
| Thermetrix Ltd. | Manufacturing | 2016 |
| Thomas Horton and Family Ltd | Real estate | 2016 |
| Tinybigideas Limited | Information & communication | 2015 |
| Top Club Abercynon Limited | Hospitality | 2022 |
| Topflight Installations Ltd | Administrative & support | 2018 |
| Tracking Guardian Ltd | Manufacturing | 2025 |
| Transformations International Ltd | Information & communication | 2022 |
| Tredegar Practice Ltd | Health & social care | 2024 |
| Trusted Touch Contractors Limited | Construction | 2026 |
| TSR Engineering Services Ltd | Professional & scientific | 2024 |
| Tube UP Scaffolding Solutions Ltd | Construction | 2018 |
| Two Way Developments Ltd | Construction | 2021 |
| Tynte Properties Ltd | Real estate | 2019 |
| Uber Vans Ltd | Wholesale & retail | 2016 |
| Upvc and Glass Ltd | Construction | 2025 |
| Valleys Steps Limited | Health & social care | 2015 |
| Voss Solutions Ltd | Wholesale & retail | 2015 |
| Voxyonder Enterprises UK Ltd | Information & communication | 2019 |
| Voxyonder Group Ltd | Financial services | 2019 |
| Voxyonder Network Services UK Ltd | Information & communication | 2019 |
| Voxyonder Retail UK Ltd | Information & communication | 2019 |
| West Coast Software Ltd | Information & communication | 2013 |
| Wild Wood Maintenance Ltd | Agriculture & fishing | 2025 |
| Willis & Lacey Groundwork Services Limited | Construction | 2023 |
| Wilsoncymru Ltd | Wholesale & retail | 2019 |
| Wonderful World of Websites Limited | Information & communication | 2025 |
| Z. P. Speech Therapy & Mindfulness Ltd | Health & social care | 2009 |
| Zora Holdings Ltd | Real estate | 2025 |