| THE Massage Clinic Limited | Other services | 2021 |
| THE Massage Training School Limited | Education | 2017 |
| THE Moorings (Exmouth) Management Company Limited | Households | 1996 |
| THE Native CUT Ltd | Manufacturing | 2026 |
| THE Nineteenth Supply Ltd | Wholesale & retail | 2025 |
| THE Nook.Cranny Management Company Ltd | Administrative & support | 2022 |
| THE Oak Leaf (Devon) Limited | Hospitality | 2024 |
| THE Oaks (Exmouth) Management Company Limited | Households | 2021 |
| THE Old Orchard Payhembury Management Ltd | Other services | 2024 |
| THE Oven Cleaning MAN Limited | Administrative & support | 2012 |
| THE Parts Guys Ltd | Wholesale & retail | 2017 |
| THE Point (Exmouth) Ltd | Hospitality | 2025 |
| THE Point IS Ltd | Professional & scientific | 2017 |
| THE Quiet Mind Centre | Health & social care | 1993 |
| THE Renovation Company (South West) Limited | Construction | 2024 |
| THE Retreat (Exmouth) Company Limited | Households | 2005 |
| THE Steelworks (South West) Ltd | Manufacturing | 2015 |
| THE Storage Bank Limited | Other services | 2018 |
| THE Storage Guys Exeter Limited | Administrative & support | 2025 |
| THE Storage Guys Limited | Administrative & support | 2020 |
| THE Stride Timber Company Limited | Construction | 2008 |
| THE Syzygy Partnership Ltd | Professional & scientific | 2003 |
| THE Tri-Hards Group CIC | Arts & recreation | 2021 |
| THE Worx Devon Limited | Construction | 2016 |
| These Three Limited | Professional & scientific | 2021 |
| Thetis Marine Limited | Administrative & support | 2012 |
| Thirty One Imperial Road Limited | Households | 2000 |
| Thomas Mercer Ltd | Manufacturing | 1983 |
| Thorneycroft (Exmouth) Limited | Households | 1995 |
| Thorngate Road Properties Limited | Real estate | 2007 |
| Three Sixty Rehab Ltd | Health & social care | 2016 |
| Tidelines EXE CIC | Other services | 2020 |
| Tidemark Ltd | Construction | 2026 |
| Timber Intent Limited | Manufacturing | 1996 |
| Timpton Limited | Real estate | 2010 |
| Titanium Micro-Fasteners Limited | Manufacturing | 2009 |
| TJ & Family Limited | Hospitality | 2026 |
| TLC Palliative Care at Home Community Interest Company | Health & social care | 2018 |
| TMA Leisure Limited | Arts & recreation | 2016 |
| TND Courier Ltd | Transport & logistics | 2024 |
| Toasty Toasties Ltd | Hospitality | 2020 |
| Toby RIX Limited | Construction | 2025 |
| TOC Detailing Limited | Other services | 2025 |
| Tommy Evans Carpentry Limited | Construction | 2025 |
| Tomort Ltd | Real estate | 2001 |
| Tompot Blenny Ltd | Hospitality | 2023 |
| Tomsett HR Consulting Ltd | Professional & scientific | 2025 |
| Tonbraun Ltd | Real estate | 2025 |
| Topsham to Turf Ferry Limited | Transport & logistics | 2022 |
| Toraphene Ltd | Manufacturing | 2018 |
| Torbay Seaway & Stevedores Limited | Other services | 1977 |
| Total Management Services Ltd | Households | 2021 |
| Totaltee Limited | Manufacturing | 2014 |
| Totnes Brewing Co Limited | Manufacturing | 2015 |
| Tower House (Exmouth) Limited | Households | 2007 |
| Toys 4 Vans Limited | Wholesale & retail | 2016 |
| TPX Group Ltd | Wholesale & retail | 2025 |
| TRACTOR2TRADE Ltd | Wholesale & retail | 2024 |
| Tranquil Treasures Ltd | Administrative & support | 2025 |
| Trans Dumitru Ltd | Transport & logistics | 2021 |
| Travencore Court (Exmouth) Management Company Limited | Households | 1981 |
| Trees and Scenes Limited | Administrative & support | 2012 |
| Trevett Vending Ltd | Wholesale & retail | 2026 |
| Trevex Capital Ltd | Real estate | 2024 |
| Trews Weir Court Management Limited | Administrative & support | 2004 |
| Triangle Court Management Limited | Households | 1974 |
| Tribal Sports Nutrition Limited | Wholesale & retail | 2012 |
| Trinity Court Management Company (Exeter) Limited | Households | 2014 |
| Trouble in Utopia Ltd | Information & communication | 2017 |
| TSH Engineering Services Ltd | Professional & scientific | 2024 |
| Turnaround-Hub Limited | Health & social care | 2019 |
| Twain Innovation Ltd | Information & communication | 2024 |
| Twenty Four Morton Crescent Limited | Households | 1982 |
| Twisted Leisure Ltd | Hospitality | 2019 |
| TWM Technology Limited | Manufacturing | 1992 |
| Two Brothers II Limited | Agriculture & fishing | 2019 |
| Two Spot Ventures Limited | Professional & scientific | 2015 |
| Twocorp Ltd | Transport & logistics | 2006 |
| Uandi Design Ltd | Administrative & support | 2011 |
| UK Chaps | Extraterritorial | 2012 |
| UK Self Storage Association | Professional & scientific | 2008 |
| Ulysses House Limited | Real estate | 2015 |
| Unboxed Logistics Group Limited | Transport & logistics | 2025 |
| United Mission Ltd | Education | 2023 |
| Universal Scuffs Limited | Wholesale & retail | 2020 |
| Uplify Ltd. | Wholesale & retail | 1999 |
| Upton Road Property Management Company Limited | Households | 2009 |
| Urban and Sea Holdings Limited | Financial services | 2025 |
| Urban Heritage Ltd | Administrative & support | 2007 |
| Urmel on the Hill Limited | Administrative & support | 2023 |
| USA Nails Exmouth Limited | Other services | 2022 |
| Valinor Investment Holdings Limited | Financial services | 2026 |
| Vape Corner UK Limited | Wholesale & retail | 2015 |
| VAT Advice & Training Services Limited | Professional & scientific | 1994 |
| Veness & Co Ltd | Professional & scientific | 2024 |
| Venturenomix Consultancy Ltd | Professional & scientific | 2019 |
| Victoria Gardens Management Company (Exmouth) Limited | Real estate | 2016 |
| Victoria Road (Exmouth) Limited | Real estate | 2006 |
| Victoria Road Practice Ltd. | Health & social care | 2008 |
| Vincemus Ltd | Information & communication | 2024 |