| THE Public Relations Company (Production) Limited | Professional & scientific | 2004 |
| THE Quirky Wood Catering Company Limited | Hospitality | 2017 |
| THE Railway Tavern Inn (Risca) Limited | Hospitality | 2014 |
| THE Real Cream Company Ltd | Manufacturing | 2026 |
| THE Real Seed Collection Ltd | Agriculture & fishing | 2006 |
| THE Redeemed Christian Church of GOD Grace Assembly Parish | Other services | 2026 |
| THE Rescue Hotel Ltd | Agriculture & fishing | 2021 |
| THE Rich Bean Coffee Shop Limited | Hospitality | 2024 |
| THE Roll OUT the Barrel Trust | Water & waste | 2012 |
| THE Rosa LUX Collective Ltd | Professional & scientific | 2025 |
| THE Rotary Water Barrel Company Limited | Water & waste | 2023 |
| THE Royal Hotel Limited | Hospitality | 1994 |
| THE Royale Café Newport Limited | Hospitality | 2025 |
| THE Ryde George Street Management Company Limited | Households | 1997 |
| THE Sagency Music Limited | Administrative & support | 2017 |
| THE Sailor's Safety Ltd | Hospitality | 2024 |
| THE Salterns (IW) Management Company Limited | Households | 2024 |
| THE Satchell Organisation Limited | Real estate | 2000 |
| THE Scallop Shell Limited | Hospitality | 2013 |
| THE Scrace Group Limited | Information & communication | 2019 |
| THE Settle (K9) Limited | Other services | 2004 |
| THE Shakespeare Bar and Grill Ltd | Hospitality | 2026 |
| THE Ship Caerleon Ltd | Hospitality | 2020 |
| THE Shop at Broadway Ltd | Wholesale & retail | 2020 |
| THE Sign Shop Newport Numberplates Ltd | Manufacturing | 2023 |
| THE Sign Shop, Newport Limited | Manufacturing | 2015 |
| THE Smart Growth Strategy Co Ltd | Administrative & support | 2024 |
| THE Social Accountant Limited | Professional & scientific | 2022 |
| THE Society for the Study of Artificial Intelligence and the Simulation of Behaviour | Other services | 1999 |
| THE South Wales Bicycle Company Limited | Wholesale & retail | 2013 |
| THE Space Place Self Storage (Telford) Limited | Real estate | 2006 |
| THE Space Place Self Storage Ltd | Transport & logistics | 2003 |
| THE Springfield Mews Management Company Ltd | Extraterritorial | 2001 |
| THE Square Restaurant Ltd | Hospitality | 2026 |
| THE Square School Limited | Education | 2009 |
| THE Storage Group Limited | Administrative & support | 2001 |
| THE Stress Less Clinic Limited | Health & social care | 2017 |
| THE Stuffed Muffin Ltd | Hospitality | 2026 |
| THE Sun Lounge Tanning Studio (Newport) Ltd | Other services | 2017 |
| THE Sustain Theatre CIC | Education | 2012 |
| THE Tall Ostrich Limited | Administrative & support | 2014 |
| THE Three Horseshoes (Sambrook) Limited | Hospitality | 2021 |
| THE Time Teller Ltd | Other services | 2021 |
| THE Touch of Light Ltd | Extraterritorial | 2023 |
| THE Trade Package Ltd | Construction | 2026 |
| THE Traditional London PIE Guyz IOW Ltd | Hospitality | 2025 |
| THE Travel Store Gnosall Ltd | Administrative & support | 2018 |
| THE Treatment Room Group Ltd | Health & social care | 2017 |
| THE Treatment Room Group UK Ltd | Health & social care | 2024 |
| THE Turnery Limited | Financial services | 2016 |
| THE Tutors Team Ltd | Education | 2015 |
| THE Vale Roast Meat Company Limited | Hospitality | 2016 |
| THE Valleys Property Group Ltd | Real estate | 2023 |
| THE Victoria (Abergavenny) Ltd | Hospitality | 2022 |
| THE Village Auto Centre (Caerleon) Limited | Wholesale & retail | 2011 |
| THE Village Store Crumlin Ltd | Wholesale & retail | 2014 |
| THE Vine Arddleen Ltd | Hospitality | 2024 |
| THE Viral Circle Ltd | Information & communication | 2025 |
| THE Virtual Village Ltd | Administrative & support | 2024 |
| THE Wardrobe (UK) Limited | Wholesale & retail | 2003 |
| THE Wasteless Project Ltd | Wholesale & retail | 2021 |
| THE Waterloo Inn (Nash) Limited | Hospitality | 2019 |
| THE Way of the Cloud Ltd | Information & communication | 2019 |
| THE Welsh Housing Partnership Limited | Real estate | 2011 |
| THE Welsh Joinery Workshop Ltd | Manufacturing | 2023 |
| THE Welsh Lovespoon Studio Limited | Manufacturing | 2024 |
| THE West Wales Chamber of Commerce | Other services | 1883 |
| THE Wheatsheaf [Howden] Ltd | Hospitality | 2012 |
| THE White Dome Trading Ltd | Wholesale & retail | 2024 |
| THE White Lion Arreton Ltd | Hospitality | 2023 |
| THE Wight Soul Limited | Wholesale & retail | 2026 |
| THE Wildings Forest School Ltd | Education | 2021 |
| THE Wildling Collective Limited | Administrative & support | 2013 |
| THE Windsor Building Ltd | Real estate | 2016 |
| THE Wolds Hospitality Ltd | Hospitality | 2026 |
| THE YEW Tree Kids Ltd | Health & social care | 2010 |
| Thebearcave.Wales Limited | Wholesale & retail | 2022 |
| Thebellinncaerleon Ltd | Hospitality | 2020 |
| Thecardclan Limited | Wholesale & retail | 2025 |
| Thecoalshed Limited | Professional & scientific | 2011 |
| Thecollectionuk Ltd | Hospitality | 2025 |
| Thegoodvegan Ltd | Information & communication | 2022 |
| Thehuntsmanhotel Shirenewton Chepstow Ltd | Hospitality | 2020 |
| Theia Jewellery Ltd | Wholesale & retail | 2014 |
| Theiguys Ltd | Other services | 2018 |
| Theltant Health Limited | Health & social care | 2021 |
| Themopsquaduk Ltd | Administrative & support | 2025 |
| Theodosia Ltd | Wholesale & retail | 2019 |
| Therhiclub Ltd | Arts & recreation | 2022 |
| Thermal Matters Ltd | Manufacturing | 2020 |
| Thermal-Tek Solutions Limited | Construction | 2014 |
| Thesonostudio Ltd | Health & social care | 2025 |
| Thetcgpack Ltd | Wholesale & retail | 2025 |
| Thewhitehart@Caerleon Ltd | Hospitality | 2026 |
| Thingable Ltd | Information & communication | 2022 |
| Think One (UK) Ltd | Information & communication | 2014 |
| Think One Homes Ltd | Real estate | 2019 |
| Think Twice Show Limited | Information & communication | 2023 |
| Thinking Diversity CIC | Information & communication | 2014 |
| Thinkmath Limited | Education | 2023 |