| TJR Media Ltd | Information & communication | 2015 |
| TOM White Composites Ltd | Manufacturing | 2021 |
| Top Gear Limited | Wholesale & retail | 2013 |
| Top Property Cornwall Ltd | Construction | 2018 |
| Touchline Law Limited | Professional & scientific | 2016 |
| Towan Heights Residents Association Limited | Households | 2017 |
| TR7 Skate Ltd | Wholesale & retail | 2018 |
| Trainzmart Ltd | Information & communication | 2020 |
| Tranquility Independent Funeral Services Ltd | Other services | 2020 |
| Trans-Rt (UK) Limited | Transport & logistics | 2009 |
| Trecarn Training and Consultancy Ltd | Professional & scientific | 2022 |
| Trecerus Management NO 1 Limited | Households | 2010 |
| Trecombe Lakes Limited | Hospitality | 2012 |
| Treewise Ltd | Agriculture & fishing | 2021 |
| Trelawney Care Ltd | Health & social care | 2006 |
| Tremorvah Court Management Company Limited | Households | 2000 |
| Tremorvah Management Company Limited | Households | 1998 |
| Tremough Development Vehicle Limited | Construction | 2002 |
| Trenoweth Carpentry, Joinery and Property Maintenance Ltd | Construction | 2014 |
| Trevow Carpentry Ltd | Manufacturing | 2022 |
| Trewinnard Court Management Limited | Households | 1999 |
| Tribally Studios Ltd | Information & communication | 2021 |
| Trifid Limited | Wholesale & retail | 2002 |
| Trifle Gathering Productions C.I.C. | Arts & recreation | 2019 |
| Trimford Limited | Manufacturing | 2000 |
| Tristan Garage Limited | Wholesale & retail | 2022 |
| Trivo Travel Ltd | Administrative & support | 2017 |
| Trolling Ltd | Information & communication | 2023 |
| True Bespoke Fine Furniture Ltd | Manufacturing | 2026 |
| Truen Building Services Limited | Construction | 2021 |
| Truro Lane (Penryn) Management Company Limited | Real estate | 1995 |
| Truro Portable Buildings Limited | Manufacturing | 1979 |
| Truro Recycling Limited | Water & waste | 2018 |
| Truro Sheds Limited | Manufacturing | 2019 |
| Trust Research Limited | Financial services | 2002 |
| Ultramed Limited | Information & communication | 2014 |
| Umami Recruitment Ltd | Administrative & support | 2025 |
| Urban Plan Limited | Real estate | 2014 |
| VDM Crew Ltd | Construction | 2014 |
| Veor Build Holdings Limited | Financial services | 2025 |
| Veor Build Ltd | Construction | 2019 |
| Verdant Brewing Company Limited | Manufacturing | 2014 |
| Verdi Electrical Solutions Ltd | Construction | 2025 |
| Vermeer Fishing Company Limited | Agriculture & fishing | 2002 |
| VIA Ferrata Cornwall C.I.C. | Arts & recreation | 2020 |
| Virtus Creative Ltd | Arts & recreation | 2017 |
| Visionary Backcare Ltd | Health & social care | 2020 |
| VMC Management Limited | Other services | 2017 |
| VMC2 Management Company Ltd | Households | 2021 |
| VR 1844 Limited | Construction | 2025 |
| Vulkanus Ltd | Wholesale & retail | 2018 |
| Walpole Specialists Limited | Health & social care | 2010 |
| Wanderlands (Somerset) Limited | Professional & scientific | 2020 |
| Watershed Shop Ltd | Wholesale & retail | 2019 |
| Waterside Chiropractic Limited | Health & social care | 2013 |
| Wave Publications Ltd | Information & communication | 2012 |
| Wavelength Media Limited | Manufacturing | 2014 |
| Waymeadow Management Company LLP | | 2013 |
| Webber Rowe Properties LLP | | 2012 |
| Weir Creatives Ltd | Professional & scientific | 2025 |
| Well Developed Limited | Real estate | 2003 |
| Wessex Wyvern Ltd | Information & communication | 2018 |
| West Cornwall Inns Ltd | Other services | 2017 |
| West-O Hygiene Solutions Ltd | Manufacturing | 2018 |
| Westcountry Park Homes (Cornwall) Ltd | Real estate | 2021 |
| Western AXE Associates Limited | Professional & scientific | 2021 |
| Western Decorating Supplies Limited | Wholesale & retail | 2006 |
| Westland Construction Ltd | Construction | 2020 |
| Wheal Animation Limited | Information & communication | 2025 |
| Wheal Grey Ecology Ltd | Professional & scientific | 2020 |
| White Rock Outdoor Limited | Wholesale & retail | 1986 |
| Whitsonfays Ltd | Construction | 2022 |
| Wildflower Penryn Ltd | Hospitality | 2024 |
| Wilkes Developments Ltd | Construction | 2025 |
| Will Works Limited | Professional & scientific | 2022 |
| William White Design Ltd | Manufacturing | 2018 |
| Williams Brothers Creative Ltd | Information & communication | 2022 |
| Williams Scott Limited | Administrative & support | 2014 |
| Wizard Systems (UK) Limited | Information & communication | 2001 |
| Wonderverse Limited | Professional & scientific | 2008 |
| Woodlands Close Limited | Construction | 2024 |
| Woods GEO Limited | Professional & scientific | 2021 |
| Works Design Studio Limited | Professional & scientific | 2024 |
| WOW Dental Marketing Ltd | Professional & scientific | 2022 |
| Wright Infrastructure Limited | Construction | 2023 |
| WSB Property Cornwall Ltd | Real estate | 2025 |
| Wylder Ltd | Information & communication | 2022 |
| Yacht Penzance Ltd | Hospitality | 2023 |
| Yello Landscape and Design Ltd | Administrative & support | 2023 |
| YMR Chiropractic Ltd | Health & social care | 2022 |
| Your Catering Solutions Limited | Hospitality | 2018 |
| Your Inspired Life Limited | Extraterritorial | 2019 |
| Your Partnerships Ltd | Administrative & support | 2019 |
| Zacacockaroli Ltd | Real estate | 2019 |
| ZAK and Jack Catering Ltd | Hospitality | 2023 |
| Zarycki Ltd | Transport & logistics | 2016 |
| Zeal KBB Interiors Ltd | Wholesale & retail | 2021 |
| Zico Dental Limited | Health & social care | 2025 |