| Thai SA1 Limited | Hospitality | 2017 |
| Thai-Dee Cuisine Limited | Hospitality | 2025 |
| Thames Bank Property Company Limited | Professional & scientific | 2004 |
| Thanks Charlie Limited | Wholesale & retail | 2011 |
| Thasmai Chakra Ltd | Wholesale & retail | 2026 |
| That 1 Percent Solutions Ltd | Information & communication | 2024 |
| That Planner Limited | Professional & scientific | 2025 |
| THE 3 Mughals Restaurant Ltd | Hospitality | 2011 |
| THE Aber Sanctuary Ltd | Health & social care | 2022 |
| THE Aberpergwm Estate Company Holdings Limited | Financial services | 2024 |
| THE Aberpergwm Estate Company Limited | Real estate | 2015 |
| THE Acropolis Greek Restaurants Limited | Hospitality | 2019 |
| THE Admin Corner Ltd | Public administration | 2025 |
| THE Adviser Alliance (Holdings) Ltd | Financial services | 2017 |
| THE Airbnb Guys Ltd | Hospitality | 2022 |
| THE Alexander Sinclair Group Ltd | Information & communication | 2017 |
| THE Alternative Energy Centre Ltd | Construction | 2023 |
| THE AMI Store & Accessories Ltd | Wholesale & retail | 2022 |
| THE Annapurna Wolverhampton Ltd | Hospitality | 2020 |
| THE Antelope Property Partnership LLP | | 2018 |
| THE Aquatic Retailer Ltd | Wholesale & retail | 2025 |
| THE Archery Shop Ltd | Wholesale & retail | 2011 |
| THE Bark Side Academy Ltd | Professional & scientific | 2025 |
| THE Bay Mortgages Ltd | Financial services | 2026 |
| THE Bay Print Co Ltd | Manufacturing | 2022 |
| THE Beacon Hub Swansea Ltd | Other services | 2025 |
| THE Bell Inn Talbot Ltd | Hospitality | 2018 |
| THE Better OFF Club Ltd | Professional & scientific | 2020 |
| THE Big Beautiful Garden Company Ltd | Administrative & support | 2006 |
| THE Big Promotional Trade Show Ltd | Professional & scientific | 2023 |
| THE BIN Co Ltd | Water & waste | 2026 |
| THE Bold Corner Ltd | Wholesale & retail | 2018 |
| THE Bony Inn Limited | Hospitality | 2022 |
| THE Bookshelf Mumbles Limited | Real estate | 2023 |
| THE Box Furniture Limited | Manufacturing | 2013 |
| THE Boxyard Ltd | Administrative & support | 2019 |
| THE Brickyard (Swansea) Limited | Real estate | 2019 |
| THE Bridal DEN Ltd | Wholesale & retail | 2020 |
| THE Bridge (Brynamman) Ltd | Hospitality | 2015 |
| THE Bridge END PUB Limited | Hospitality | 2019 |
| THE Brokerage (Kent) Limited | Financial services | 2021 |
| THE Brow Blading Company Limited | Other services | 2024 |
| THE Brow Secret Ltd | Other services | 2021 |
| THE Buckland Project Ltd | Real estate | 1996 |
| THE Bunkhouse Music Venue C.I.C. | Hospitality | 2020 |
| THE Business Helpline Limited | Other services | 2016 |
| THE Cafe Royales Limited | Hospitality | 2003 |
| THE Car Shop Swansea Limited | Wholesale & retail | 2010 |
| THE Cardiac Scientist Ltd | Health & social care | 2020 |
| THE Careerologist Ltd | Professional & scientific | 2023 |
| THE Catering Warehouse Swansea Ltd | Wholesale & retail | 2019 |
| THE Chestnuts (Murton) Management Company Limited | Real estate | 2013 |
| THE Chips ARE Down Ltd | Hospitality | 2024 |
| THE Choice IS Yours Limited | Wholesale & retail | 2001 |
| THE Choice Practice Ltd | Wholesale & retail | 2026 |
| THE Cleaning Company Swansea Ltd | Administrative & support | 2025 |
| THE Cleaning Signature Limited | Administrative & support | 2026 |
| THE Coach's Corner Limited | Education | 2024 |
| THE Coffee Ground Ltd | Hospitality | 2026 |
| THE Coffee POT Kittle Ltd | Hospitality | 2026 |
| THE Colin Ford Consultancy Limited | Financial services | 2000 |
| THE Collector (UK) Limited | Wholesale & retail | 2010 |
| THE Colliers Arms (Swansea) Limited | Hospitality | 2012 |
| THE Collingwood Society CIC | Education | 2026 |
| THE Committee for Peace in the Middle East Ltd | Administrative & support | 2018 |
| THE Constant Media Limited | Information & communication | 2010 |
| THE Consultants-E Limited | Education | 2013 |
| THE Copper Lens Ltd | Professional & scientific | 2018 |
| THE Cosmetik Clinic Limited | Health & social care | 2017 |
| THE Crab Island Company Ltd | Hospitality | 2019 |
| THE Creative Cafe Haverfordwest Limited | Wholesale & retail | 2009 |
| THE Creative LED Sell Company Ltd | Professional & scientific | 2025 |
| THE Crown Academy Limited | Education | 2026 |
| THE Cusp Marketing Ltd | Professional & scientific | 2023 |
| THE Decorative Glass Centre Limited | Manufacturing | 2016 |
| THE Design Office (Wales) Limited | Professional & scientific | 1999 |
| THE Dog Cabin Ltd | Agriculture & fishing | 2025 |
| THE Dog House Grooming Ltd | Administrative & support | 2023 |
| THE Dog Retreat Swansea Ltd | Other services | 2026 |
| THE Doghouse Daycare & Grooming Ltd | Administrative & support | 2020 |
| THE Door Boys Limited | Wholesale & retail | 2024 |
| THE Doughworks Limited | Hospitality | 2021 |
| THE Dressmakers' Guild Ltd | Wholesale & retail | 2020 |
| THE Dunes Gift Shop Limited | Wholesale & retail | 2023 |
| THE Dyfed Water Company Ltd | Water & waste | 2007 |
| THE Dyslexia Experts Limited | Education | 2025 |
| THE Elms Financial Services Limited | Financial services | 2020 |
| THE Energy Room Ltd | Other services | 2024 |
| THE Engraving Centre Limited | Administrative & support | 2004 |
| THE Environment Centre Ltd | Information & communication | 1994 |
| THE Ethos Group Limited | Construction | 2004 |
| THE Exodus 1820 Platform Ltd | Other services | 2025 |
| THE Faction Group Ltd | Information & communication | 2026 |
| THE Fairytale Way Ltd | Education | 2021 |
| THE Falafel Stall Ltd | Hospitality | 2019 |
| THE FAN Company Limited | Extraterritorial | 2007 |
| THE Farmer's Arms Clydach Limited | Hospitality | 2019 |
| THE Farmers Inn Ltd | Hospitality | 2025 |
| THE Fire Safety Scheme Limited | Professional & scientific | 2019 |
| THE Fitness Studio (Swansea) Ltd | Arts & recreation | 2025 |