| T.A.E Aero Limited | Wholesale & retail | 2020 |
| T.O.C. Trim Ltd. | Manufacturing | 2016 |
| Tafarn Harris Limited | Extraterritorial | 2015 |
| Tamarind (Tredegar) Ltd | Hospitality | 2022 |
| Tamarind JM Limited | Hospitality | 2024 |
| Tamarind MKT Ltd | Hospitality | 2018 |
| TAN Y Bryn Rhymney Ltd | Wholesale & retail | 2022 |
| Tappys Taxi's Limited | Transport & logistics | 2021 |
| Team-Mighter Limited | Wholesale & retail | 2021 |
| Teknomusik Ltd | | 1988 |
| TGM Building and Engineering Services Ltd | Construction | 2013 |
| That Protein Place Ltd | Wholesale & retail | 2025 |
| THE Belle VUE Tredegar Ltd | Hospitality | 2026 |
| THE Cafe at Play Ltd | Hospitality | 2024 |
| THE Cambrian Bar & Grill Ltd | Hospitality | 2023 |
| THE Circle Kebab Limited | Hospitality | 2014 |
| THE Crown Inn Varteg Limited | Hospitality | 2016 |
| THE Cwtch Rhymney Limited | Hospitality | 2017 |
| THE Face Place Aesthetics Ltd | Health & social care | 2025 |
| THE Floor Studio Ltd | Construction | 2020 |
| THE Flooring Depot Superstores Ltd | Wholesale & retail | 2025 |
| THE Hopkins Property Group Ltd | Real estate | 2021 |
| THE Junction Inn Ltd | Hospitality | 2025 |
| THE Kane Academy Limited | Arts & recreation | 1996 |
| THE Learning Disability Eclassroom Ltd | Education | 2021 |
| THE MEX Food Co Ltd | Hospitality | 2022 |
| THE Misty Group Ltd | Hospitality | 2025 |
| THE Modern Vintage Emporium Ltd | Wholesale & retail | 2026 |
| THE Ocean (G & J ) Ltd | Wholesale & retail | 2024 |
| THE Old Bakehouse Trading Company Limited | Real estate | 2016 |
| THE Old Victoria Foundry Ltd | Real estate | 2015 |
| THE Puddlers Arms Ltd | Hospitality | 2025 |
| THE Safety Coach Ltd | Professional & scientific | 2016 |
| Thebelleview Limited | Hospitality | 2023 |
| Theo Logistic Services Ltd | Transport & logistics | 2024 |
| Thermoguard Solutions Ltd | Construction | 2022 |
| Thomas Land Solutions Limited | Construction | 2025 |
| Thraiv Ltd | Wholesale & retail | 2023 |
| Tiles World Ltd | Construction | 2018 |
| Timeless Elegance Aesthetics Limited | Other services | 2025 |
| Tiny Toed Tots Ltd | Wholesale & retail | 2025 |
| TM Enterprise Software Ltd | Information & communication | 2022 |
| TOM James Projects Limited | Construction | 2020 |
| Tommie's Autos Limited | Wholesale & retail | 2023 |
| Toned UP Limited | Arts & recreation | 2017 |
| Top Tier Decorating Solutions Ltd | Construction | 2024 |
| Total Property Development Solutions Ltd | Construction | 2014 |
| Transport-Able Ltd | Professional & scientific | 2022 |
| Traumatica Movie Ltd. | Information & communication | 2024 |
| Trebor Nasus Limited | Hospitality | 2009 |
| Tredegar Arms Hotel Limited | Hospitality | 2018 |
| Tredegar Car Valeted Ltd | Administrative & support | 2026 |
| Tredegar Carpet Outlet Ltd | Wholesale & retail | 2025 |
| Tredegar Chippy & Cuisine Ltd | Hospitality | 2025 |
| Tredegar Community Club House C.I.C. | Arts & recreation | 2025 |
| Tredegar Eyes Ltd | Wholesale & retail | 2026 |
| Tredegar Iron & Coal Company Ltd | Wholesale & retail | 2021 |
| Tredegar K9 Security Services Ltd | Administrative & support | 2020 |
| Tredegar Mobile Teck Limited | Wholesale & retail | 2024 |
| Tredegar Sports & Social Club Limited | Hospitality | 2014 |
| Treetop Roofing Ltd | Construction | 2024 |
| Tricore Training Limited | Administrative & support | 2026 |
| Trinity Pathways Ltd | Real estate | 2024 |
| True Transport Limited | Transport & logistics | 2014 |
| Truss Construction Ltd | Construction | 2025 |
| TRW Creative Ltd | Administrative & support | 2018 |
| Tuck Shop Productions Ltd | Information & communication | 2026 |
| Tuxan Consulting Ltd | Professional & scientific | 2009 |
| Tuxan Properties Ltd | Real estate | 2017 |
| Twyn Properties Ltd | Real estate | 2024 |
| Twyn Property Rentals Ltd | Real estate | 2024 |
| Tysswg Properties Ltd | Real estate | 2024 |
| United Europe Logistic Limited | Wholesale & retail | 2020 |
| United Medical Staffing Solutions Professionals Limited | Administrative & support | 2011 |
| Vacsax Limited | Manufacturing | 2019 |
| Valley Gardens Ltd | Water & waste | 2021 |
| Valley Tree and Garden Limited | Administrative & support | 2025 |
| Valleys GAS Limited | Construction | 2022 |
| Valleys Pipelines Limited | Construction | 2010 |
| Vape With Ease Bargoed Ltd | Other services | 2017 |
| Vape With Ease Brynmawr Ltd | Wholesale & retail | 2015 |
| Vape With Ease Ltd | Wholesale & retail | 2013 |
| Vapour Dreams Limited | Wholesale & retail | 2015 |
| Vaughan Bros Funeral Directors Ltd | Other services | 2000 |
| Victoria Blush Collections Limited | Other services | 2025 |
| Victoria Garden Centre Limited | Wholesale & retail | 2014 |
| Victoria Hamilton Consulting Limited | Administrative & support | 2014 |
| Village Rentals Ltd | Real estate | 2023 |
| Vital Fit Pro Ltd | Professional & scientific | 2024 |
| W Palfrey Ceramics Limited | Construction | 2010 |
| Waga Real Estate Limited | Real estate | 2023 |
| Waldron Commercials Ltd | Wholesale & retail | 2010 |
| WE ARE Paradoxx Limited | Manufacturing | 2024 |
| Westmond Investments Limited | Real estate | 1962 |
| Weston FM Group Ltd | Administrative & support | 2013 |
| White Willow Furniture Limited | Manufacturing | 2016 |
| Wholeness Health and Well-Being Ltd | Other services | 2024 |
| Williams Groundworks Limited | Construction | 2017 |
| Wilson Llovet Properties Limited | Real estate | 2016 |
| Wise Coatings Ltd | Construction | 2024 |