| TG Jones Retail Holdings Limited | Professional & scientific | 1949 |
| Thames Valley Recycling Limited | Water & waste | 1998 |
| Thameswood Veterinary Clinics Limited | Professional & scientific | 2003 |
| THE Abbots Garden Management Limited | Households | 1992 |
| THE Angell's Barber Company Limited | Other services | 2003 |
| THE Association for Roman Archaeology Limited | Education | 1996 |
| THE Bowood Hotel Spa and Golf and Country Club LLP | | 2006 |
| THE C.D. Specialists Limited | | 1986 |
| THE Courtyards Ltd | Households | 2003 |
| THE Diligent Frog Limited | Hospitality | 2003 |
| THE English Rose (Calne) Limited | Other services | 2008 |
| THE Greyhound (Swindon) Limited | Hospitality | 2002 |
| THE Hair Company (Westbury) Limited | Other services | 2002 |
| THE Hair Group Swindon Limited | Other services | 2005 |
| THE Hair Studio Malmesbury Ltd | Other services | 2006 |
| THE Happy Hooker Limited | Wholesale & retail | 1994 |
| THE Helliar Partnership Limited | Agriculture & fishing | 2007 |
| THE James Dyson Foundation | Professional & scientific | 2002 |
| THE Jubilee Centre | Health & social care | 1999 |
| THE LAM RIM (Wilts & Glos) Buddhists | Education | 1996 |
| THE Lanes Management Company Limited | Real estate | 2006 |
| THE Lighthouse Design Partnership LLP | | 2007 |
| THE Maharajah Limited | Hospitality | 2007 |
| THE Merchant's House (Marlborough) Trust | Arts & recreation | 1992 |
| THE Mount Pleasant Centre | Other services | 2007 |
| THE Museum of Computing @ Swindon Limited | Arts & recreation | 2001 |
| THE Old Vicarage (Chippenham) Limited | Health & social care | 2002 |
| THE Paperback Shop.Co.Uk EOT Ltd | Administrative & support | 2019 |
| THE Parliament Place Management Company Limited | Households | 1987 |
| THE Ripple Concept Limited | Professional & scientific | 2003 |
| THE Telephone Answering Company Limited | Extraterritorial | 2007 |
| THE Wardrobe Trading Company Limited | Real estate | 1997 |
| THE Water Garden Nurseries Limited | Wholesale & retail | 2005 |
| THE Woodlands STP Limited | Households | 2002 |
| Therese Turner Limited | Administrative & support | 2013 |
| Thermocold Limited | Construction | 2003 |
| Thickwood Estate Management Company Limited | Households | 1983 |
| Thornacre Land Limited | Real estate | 2003 |
| Thurlow Investments Limited | Real estate | 1988 |
| TIM Farthing Limited | Administrative & support | 2007 |
| Timberwright Limited | Construction | 2004 |
| Timesegment Limited | Manufacturing | 2001 |
| TMH Partners Ltd | Administrative & support | 2005 |
| Tonercare Limited | Wholesale & retail | 2002 |
| Tony Tyler Financial Services Limited | Financial services | 1991 |
| Tony Tyler Insurance Services Limited | Financial services | 2004 |
| Top to TOE (Warminster) Limited | Other services | 2003 |
| Tops Hair Salon & Beauty Ltd | Other services | 2015 |
| TOR TUS Limited | Construction | 2003 |
| Total Air Systems Ltd. | Manufacturing | 2000 |
| Toto's Financial Services Ltd | Administrative & support | 2006 |
| Tourmoor Ltd | Arts & recreation | 2002 |
| Townsend Garden Centres (Wiltshire) Limited | Wholesale & retail | 2003 |
| Townsend Garden Centres Limited | Wholesale & retail | 2001 |
| TR Marketing Services Limited | Wholesale & retail | 2007 |
| Traderprometheus Ltd | Wholesale & retail | 2024 |
| Trans Active Limited | Administrative & support | 1989 |
| Transport Resource Limited | Professional & scientific | 2003 |
| Traumacare Limited | Health & social care | 1996 |
| Trinityweb Limited | Information & communication | 2004 |
| Trivial Business Limited | Information & communication | 2006 |
| Tubbs (UK) Ltd | Real estate | 2001 |
| Tutco Ltd. | Wholesale & retail | 2001 |
| Twisted Omentum Ltd | Administrative & support | 2013 |
| Tyndall's Mansions Limited | Real estate | 1951 |
| United Bedding Corporation Limited | Professional & scientific | 1961 |
| Ushercombe Limited | Real estate | 2003 |
| V N F Designs (Europe) Limited | Administrative & support | 2002 |
| Valutech Leasing Limited | Financial services | 2025 |
| Vancouver Lights Ltd | Information & communication | 2015 |
| Vantage Group Operations UK Limited | Wholesale & retail | 2006 |
| Victoria Park (Salisbury) Limited | Households | 1983 |
| Vince Ayris Limited | Other services | 2002 |
| Virtual Therapy Studio Ltd | Health & social care | 2022 |
| Visionplus (Salisbury) Ltd | Wholesale & retail | 1986 |
| Visionworks Life Skills Ltd | Wholesale & retail | 1996 |
| Vixen Consultants Limited | Arts & recreation | 2003 |
| Vogwell Solutions Limited | Information & communication | 2000 |
| Voluntary Action Swindon | Health & social care | 1981 |
| VW Paving Ltd | Construction | 2023 |
| W & S Lamperd Services Limited | Arts & recreation | 2005 |
| W G Dell Properties Limited | Real estate | 1977 |
| W Kerrigan Building Services Limited | Construction | 2006 |
| Walter Maidment Limited | Agriculture & fishing | 1970 |
| Wansbroughs Trust Company Limited | Professional & scientific | 2007 |
| Warminster Maltings Ltd | Manufacturing | 1998 |
| Warminster School | Education | 1994 |
| Warminster School Enterprises Ltd | Hospitality | 1991 |
| Waterbrook House (Devizes) NO. 2 Management Limited | Hospitality | 1993 |
| Waterbrook House NO 2-12 Management Company Limited | Households | 2005 |
| Wave Bathrooms Ltd | Wholesale & retail | 2006 |
| Waverider Systems Limited | Professional & scientific | 1994 |
| Wayside Garage Ltd | Wholesale & retail | 2003 |
| WCR Community Radio | Information & communication | 1999 |
| Webtech IT. Limited | Information & communication | 2000 |
| Wedash Care Services Limited | Health & social care | 2020 |
| Wessex Mortar Company Limited | Wholesale & retail | 1989 |
| Wessex Rural Crafts Limited | Agriculture & fishing | 2006 |
| Wessexcrafts Limited | Wholesale & retail | 2005 |
| West Country Educational Agency Limited | Administrative & support | 1999 |