| THE Property Service Electrical Division Limited | Construction | 2017 |
| THE Property Service Electrical Limited | Construction | 2025 |
| THE Property Service South West Limited | Construction | 2012 |
| THE Property Service Swindon Limited | Construction | 2009 |
| THE Puffin HUT Ltd. | Wholesale & retail | 2013 |
| THE Real in Ltd | Hospitality | 2018 |
| THE Rebel Hair Company Ltd | Other services | 2022 |
| THE Recovery Tree Charity | Health & social care | 2012 |
| THE Recruitment Hub Limited | Administrative & support | 2008 |
| THE Renewables Partnership Ltd | Construction | 2023 |
| THE Research Company Swindon Ltd | Information & communication | 2023 |
| THE Retro Cave Ltd | Information & communication | 2022 |
| THE Reup Group Logistics and Delivery Ltd | Transport & logistics | 2025 |
| THE Ridgeway Barns Ltd | Hospitality | 2020 |
| THE Ridgeway Thatching Company Limited | Construction | 2015 |
| THE Ridings Swindon Management Company Limited | Households | 2007 |
| THE Ropeyard (Wootton Bassett) Management Company Limited | Real estate | 2008 |
| THE Rugshack Limited | Wholesale & retail | 2004 |
| THE Safety EGG Ltd | Manufacturing | 2019 |
| THE Sail Loft (Looe) Limited | Hospitality | 2025 |
| THE Sally Pussey's Inn Limited | Real estate | 2003 |
| THE Sammio Motor Company Limited | Wholesale & retail | 2017 |
| THE Sauce Shop Limited | Transport & logistics | 2017 |
| THE School of Rock Music School Ltd | Administrative & support | 2022 |
| THE Search Equation Ltd | Information & communication | 2011 |
| THE Seasons Jole Close Freehold Limited | Households | 2016 |
| THE SGP Academy Group Limited | Construction | 2026 |
| THE Shelley Street Management Company Limited | Households | 2005 |
| THE Shires (Swindon) Management Company Limited | Households | 2005 |
| THE Simple Music Company Limited | Information & communication | 2008 |
| THE Site Projects Limited | Construction | 2021 |
| THE Skate Works Ltd | Administrative & support | 2025 |
| THE Skills Partnership Limited | Administrative & support | 2003 |
| THE SLP Group Swindon Ltd | Administrative & support | 2024 |
| THE Smart Zone Limited | Health & social care | 1999 |
| THE Snack and Sandwich Company Limited | Wholesale & retail | 2001 |
| THE Snipographer Ltd | Extraterritorial | 2024 |
| THE Social Target Limited | Professional & scientific | 2017 |
| THE Solomie Company Ltd | Wholesale & retail | 2007 |
| THE Spiky Cactus Ltd | Wholesale & retail | 2023 |
| THE SQL Workshop Limited | Wholesale & retail | 1992 |
| THE Stripey Badger Ltd | Hospitality | 2025 |
| THE Studio Swindon Limited | Arts & recreation | 2025 |
| THE Swindon Bathroom Company Ltd | Construction | 2022 |
| THE Swindon Tongue TIE Clinic Limited | Health & social care | 2025 |
| THE Swindonian CIC | Professional & scientific | 2024 |
| THE Sykes Partnership LLP | | 2004 |
| THE Tanning Room Group Limited | Other services | 2025 |
| THE TAO of Motivation Limited | Professional & scientific | 2018 |
| THE Thomas Freke and Lady Norton Charity | Health & social care | 2014 |
| THE Three Bears RUM Company Ltd | Wholesale & retail | 2025 |
| THE Trade Collective Ltd. | Construction | 2018 |
| THE Transformation Hub Limited | Professional & scientific | 2025 |
| THE Treatment Rooms Shrivenham LLP | | 2016 |
| THE Trees Eastleigh Ltd | Education | 2014 |
| THE Trees Hampshire Limited | Health & social care | 2017 |
| THE Trees Southampton Portswood Ltd | Education | 2014 |
| THE Trees Southampton Shirley Ltd | Education | 2014 |
| THE Trees Swindon Old Town Ltd | Education | 2014 |
| THE Trees Swindon Oxford Road Ltd | Education | 2014 |
| THE Triathlon Hub Ltd | Arts & recreation | 2018 |
| THE Tuppenny Ltd | Hospitality | 2016 |
| THE UK Pellet Council | Other services | 2014 |
| THE UK Wireless Internet Services Providers Association | Information & communication | 2015 |
| THE Unlucky Chicken Limited | Wholesale & retail | 2018 |
| THE Virtual Business Centre Limited | Administrative & support | 2000 |
| THE Way of the Jeff Ltd | Wholesale & retail | 2024 |
| THE Wentworth Wooden Jigsaw Company Limited | Manufacturing | 1991 |
| THE White Horse Federation | Education | 2012 |
| THE Whitehill Partnership LLP | | 2018 |
| THE Wild FIG Deli Ltd | Hospitality | 2026 |
| THE Willows (Wroughton) Management Limited | Households | 1999 |
| THE Windle PUB Company Ltd | Real estate | 2025 |
| THE Window Factory (Swindon) Limited | Manufacturing | 1989 |
| THE Window Factory Group Limited | Manufacturing | 1986 |
| THE Wine Bar (Highworth) Limited | Hospitality | 2019 |
| THE Winnerz Group Limited | Arts & recreation | 2021 |
| THE Worklife Company Limited | Professional & scientific | 1997 |
| THE Yard Juice Company Ltd | Hospitality | 2024 |
| Theatre Rendezvous Limited | Hospitality | 2017 |
| Thebap Ltd | Hospitality | 2021 |
| Thebigden Ltd | Arts & recreation | 2025 |
| Thecenturyseven Ltd | Wholesale & retail | 2023 |
| Thecla Facilities Management Ltd | Information & communication | 2012 |
| Thecubas Limited | Professional & scientific | 2025 |
| Thegn Limited | Information & communication | 2026 |
| Thegoodbarber Ltd | Other services | 2026 |
| Thehatchswindon Ltd | Hospitality | 2019 |
| Theoc Care Services Ltd | Health & social care | 2017 |
| Theos Health Ltd | Health & social care | 2022 |
| Thepriced Ltd | Information & communication | 2022 |
| Therapy Plus Ltd | Arts & recreation | 2012 |
| Therese Vision Services Ltd | Health & social care | 2018 |
| Therestlesscoach Ltd | Health & social care | 2025 |
| Thermal Dynamics Limited | Manufacturing | 1993 |
| Thermoscape Innovations Limited | Manufacturing | 2024 |
| THESKINSPA1.1 Ltd | Other services | 2024 |
| Think Sales Limited | Administrative & support | 2020 |
| Think Sustainable Futures Ltd | Information & communication | 2000 |
| Think Today Ltd | Information & communication | 2025 |