| Steven Magor and SON Paving Services Limited | Construction | 2023 |
| STG Aerospace Ltd | Manufacturing | 1985 |
| Storm Treatment Plant Service Limited | Administrative & support | 2025 |
| Storyquadrant Ltd | Education | 2023 |
| Stress Savers Events Ltd | Other services | 2019 |
| Structured Products Limited | Wholesale & retail | 2024 |
| Studio Standard Procedure Ltd | Professional & scientific | 2023 |
| Subcontractor Hub Limited | Professional & scientific | 2022 |
| Suis Dent Ltd | Health & social care | 2012 |
| Suits Estates Limited | Households | 2024 |
| Sukh Ltd | Hospitality | 2025 |
| Sunnybank Childrens Nursery Limited | Education | 2002 |
| SW Cymru Coatings Limited | Construction | 2026 |
| Swhash Ltd | Wholesale & retail | 2025 |
| Swift Removals International Limited | Transport & logistics | 2025 |
| Swing City Urban Golf Ltd | Arts & recreation | 2026 |
| Sync Taxis Limited | Transport & logistics | 2024 |
| T G Preece & SON Limited | Wholesale & retail | 2021 |
| T M Analysis Ltd | Professional & scientific | 2025 |
| T Squared Properties Limited | Real estate | 2023 |
| T Squared Property Management Limited | Real estate | 2026 |
| T'S Auto Electrics Ltd | Wholesale & retail | 2026 |
| T.C Building & Maintenance Ltd | Construction | 2022 |
| Tabernacle Property Investment Limited | Real estate | 2016 |
| TAI Gorwel Limited | Construction | 2017 |
| Tailored Automotive Innovations Limited | Wholesale & retail | 2024 |
| TAJ Taunton Diagnostics Ltd | Health & social care | 2025 |
| Talent Quest Recruitment Ltd | Administrative & support | 2025 |
| Tango Delta Consultancy Ltd | Real estate | 2020 |
| Tantech Consulting Ltd | Information & communication | 2024 |
| Target Digital Ltd | Professional & scientific | 2021 |
| Target Magazine and Marketing Ltd | Information & communication | 2019 |
| Taste of India (Newport) Ltd | Hospitality | 2025 |
| Tasty NOT Wasty C.I.C. | Hospitality | 2020 |
| Tayler Management Consultants Limited | Professional & scientific | 2025 |
| Taylors Tastyz Ltd | Hospitality | 2022 |
| TBH Digital Limited | Professional & scientific | 2022 |
| Teach Direct Recruitment Ltd | Education | 2025 |
| Tech Time Enterprise Ltd | Wholesale & retail | 2024 |
| Technical&Production Services Ltd | Professional & scientific | 2024 |
| Techno Digis Ltd | Wholesale & retail | 2024 |
| Techno Masters Hub Ltd | Information & communication | 2022 |
| Televes (UK) Limited | Wholesale & retail | 1988 |
| Tempt Consulting Limited | Professional & scientific | 2024 |
| Tendorai Ltd | Information & communication | 2025 |
| Tetha Ltd | Financial services | 2025 |
| TEZ Ventilation Ltd | Manufacturing | 2022 |
| TFC KF Ltd | Hospitality | 2025 |
| Thalia Design Automation Ltd | Information & communication | 2011 |
| Thames Valley Construction Services Ltd | Construction | 2018 |
| THE 12TH Bean Limited | Hospitality | 2025 |
| THE 5TACEY Group Limited | Financial services | 2023 |
| THE 68 Foods Ltd | Hospitality | 2025 |
| THE Accounsellor Ltd | Professional & scientific | 2020 |
| THE Bush Upper Cwmbran Limited | Hospitality | 2010 |
| THE Canine Condiments Company Ltd | Manufacturing | 2026 |
| THE Car Hotel Ltd | Wholesale & retail | 2018 |
| THE Castle of Flavour Ltd | Hospitality | 2026 |
| THE Celtic Salon Limited | Other services | 2025 |
| THE Crafty Bonobo Ltd | Wholesale & retail | 2021 |
| THE Cwtch Animal Homestay Limited | Other services | 2014 |
| THE Drunken Sailors Ltd | Hospitality | 2023 |
| THE FED Line Project Newport and Cwmbran CIC | Education | 2023 |
| THE Gate Cwmbran Ltd | Hospitality | 2025 |
| THE Gate Ponthir Ltd | Hospitality | 2018 |
| THE Glow Doctor Ltd | Health & social care | 2024 |
| THE Hidden Butcher Limited | Wholesale & retail | 2022 |
| THE Home of Stone Limited | Administrative & support | 2004 |
| THE Hungry Cowboy Ltd | Hospitality | 2025 |
| THE HWB Torfaen CIC | Education | 2017 |
| THE Laurels Community Club Pontnewydd Ltd | Hospitality | 2025 |
| THE Leadership Divergence Ltd | Professional & scientific | 2025 |
| THE Lower New Inn Ltd | Hospitality | 2025 |
| THE N.Y. Commercial Service Co. | Wholesale & retail | 2025 |
| THE Nerd Nook Cwmbran Ltd | Wholesale & retail | 2022 |
| THE Nutritious Nook Ltd | Hospitality | 2025 |
| THE Occasional Kitchen Ltd | Hospitality | 2017 |
| THE Ocean Cafe Bar & Restaurant Limited | Hospitality | 2004 |
| THE Oddfellows Arms (Cwmbran) Ltd | Hospitality | 2014 |
| THE Parkway Hotel and Spa Limited | Hospitality | 1983 |
| THE Petites Fleurs Limited | Wholesale & retail | 2019 |
| THE Power Group Ltd | Information & communication | 2022 |
| THE PR Group (South Wales) Limited | Other services | 2010 |
| THE Rally Shed Limited | Wholesale & retail | 2024 |
| THE Ramp Room LLP | | 2015 |
| THE Recycling Depot Ltd | Water & waste | 2023 |
| THE Rugby KIT Shop Limited | Wholesale & retail | 2025 |
| THE Simple Motor Company Ltd | Wholesale & retail | 2024 |
| THE Simple Transport Company Limited | Transport & logistics | 2026 |
| THE Spud Box Events Limited | Hospitality | 2024 |
| THE Spud Box Ltd | Hospitality | 2024 |
| Theatre Adhoc Education and Training Ltd | Education | 2019 |
| Thomas Classic and Modern Limited | Wholesale & retail | 2019 |
| Thornhill Community Leisure Limited | Arts & recreation | 2024 |
| Thornhill Global Limited | Manufacturing | 2014 |
| Thorteck Ltd | Construction | 2006 |
| Three Nations Dispense Limited | Manufacturing | 2017 |
| Through Their Eyes Care Ltd | Health & social care | 2023 |
| Tickled Pink Productions Limited | Arts & recreation | 2006 |
| Tiger Taxis (Cwmbran) Ltd | Transport & logistics | 2020 |