| Teamwork 4 Drivers Limited | Extraterritorial | 2000 |
| TECH2TALENT Ltd | Education | 2025 |
| Televisionary Limited | Information & communication | 2002 |
| Tempus Foods Limited | Manufacturing | 2017 |
| TEN TEN (SW) Ltd | Wholesale & retail | 2022 |
| TEN TEN Festivals Ltd | Wholesale & retail | 2025 |
| Tess Tailored Travel Limited | Administrative & support | 2026 |
| TFQ Architects Limited | Professional & scientific | 2003 |
| THE 25:40 Initiative Limited | Wholesale & retail | 2025 |
| THE Acorns (Filham) Residents' Management Company Limited | Households | 2026 |
| THE Almond Thief Limited | Hospitality | 2018 |
| THE Angel Totnes Ltd | Hospitality | 2022 |
| THE Appliance Fixers Ltd | Other services | 2022 |
| THE Archie Lincoln Trust | Health & social care | 2012 |
| THE Bar Collection Ltd | Hospitality | 2025 |
| THE Bar Teignmouth Ltd | Hospitality | 2026 |
| THE Boiler MAN Plymouth Ltd | Construction | 2026 |
| THE Brambles (Plymouth) NO.2 Management Company Limited | Households | 1995 |
| THE Canoe Shops (Group) Ltd | Financial services | 2006 |
| THE Crafty Badger Ltd | Hospitality | 2026 |
| THE Curing Barn Ltd | Wholesale & retail | 2024 |
| THE Dartmouth Distillery Company Limited | Manufacturing | 2017 |
| THE Eagle Plymouth Ltd | Hospitality | 2021 |
| THE Firs B&B Ltd | Hospitality | 2025 |
| THE Firs Property Ltd | Real estate | 2025 |
| THE Fort Inn Ltd | Hospitality | 2025 |
| THE Granite Post Limited | Wholesale & retail | 2026 |
| THE Greek Bar & Grill Limited | Hospitality | 2020 |
| THE Greek Kiosk Ltd | Hospitality | 2024 |
| THE GUN Room (UK) Ltd | Wholesale & retail | 2013 |
| THE Indian Connection Services Ltd | Wholesale & retail | 2020 |
| THE IVY Hair Lounge Ltd | Other services | 2025 |
| THE Ivybridge VET Ltd | Professional & scientific | 2025 |
| THE Jays Day Care Ltd | Health & social care | 2023 |
| THE JIU Jitsu Movement Ltd | Education | 2024 |
| THE L.E.D. Partnership Limited | Professional & scientific | 2003 |
| THE Modbury Group Limited | Information & communication | 1988 |
| THE Moors Lostwithiel Limited | Hospitality | 2025 |
| THE O'Connell Woodland Partnership LLP | | 2019 |
| THE Orchard (Modbury) Management Company Limited | Households | 2006 |
| THE Palm (Modbury) Limited | Real estate | 2020 |
| THE Peninsula Casualty Reduction Partnership LLP | | 2013 |
| THE Plastic Company (Southwest) Limited | Manufacturing | 2024 |
| THE Pool at Little Moor Ltd | Arts & recreation | 2025 |
| THE Quality Car Company Southwest Limited | Wholesale & retail | 2025 |
| THE Quarry Inn Limited | Hospitality | 2002 |
| THE Really Useful Network Ltd | Administrative & support | 2025 |
| THE Sewing Company Ltd | Manufacturing | 2025 |
| THE Solar Cleaners Ltd. | Administrative & support | 2023 |
| THE Sports Inspiration CIC | Education | 2024 |
| THE Three Mums Coffee House CIC | Hospitality | 2026 |
| THE Totnes Creperie Limited | Hospitality | 2024 |
| THE West Country Deli Limited | Wholesale & retail | 2021 |
| THE White Thorn Inn Shaugh Prior Limited | Hospitality | 2025 |
| THE Willocks Practice Limited | Construction | 1998 |
| Thequayside Ltd | Hospitality | 2021 |
| Thermalec Pool & Spa Ltd | Manufacturing | 2025 |
| Thermalec Products Limited | Extraterritorial | 1966 |
| Thesd Limited | Wholesale & retail | 2022 |
| This IS Agalma Limited | Education | 2025 |
| Thompson Estate Planning Ltd | Professional & scientific | 2020 |
| Thompson Gardner Ltd | Construction | 2024 |
| Three Sixty Degrees Expeditions Limited | Administrative & support | 2008 |
| Thrive Nutrition SW Ltd | Health & social care | 2025 |
| TIM Offer Architects Limited | Professional & scientific | 2014 |
| Timber Windows of Ivybridge Ltd | Construction | 2022 |
| Timbertech Carpentry and Building SW Ltd | Manufacturing | 2024 |
| Timms Eida Associates Limited | Professional & scientific | 2010 |
| TJC Agricultural Contractors Ltd | Agriculture & fishing | 2023 |
| TLK Plymouth Ltd | Hospitality | 2023 |
| TLK SW Ltd | Hospitality | 2025 |
| Toasted Bar Ltd | Hospitality | 2024 |
| Tomlinson Site Engineering Services Ltd | Construction | 2007 |
| Tony Preston Planning Ltd | Construction | 2025 |
| Tools 2U Direct SW Ltd | Wholesale & retail | 2020 |
| Top Fade Ivybridge Ltd | Other services | 2025 |
| Topor&Sons Ltd | Health & social care | 2023 |
| Total ICT (South West) Limited | Information & communication | 2010 |
| Total Utilities SW Limited | Construction | 2025 |
| TPC Capital Partners Ltd | Professional & scientific | 2026 |
| TPC Invest Ltd | Real estate | 2023 |
| Trackman Engineering Ltd | Manufacturing | 2013 |
| Trap Studios Ltd | Information & communication | 2025 |
| Trevelloe Substations Limited | Real estate | 2012 |
| Triangle 8 Ltd | Hospitality | 2023 |
| Truckcare Limited | Professional & scientific | 1994 |
| Trunley Traction Services Limited | Manufacturing | 2016 |
| Truro Farm Machinery Limited | Wholesale & retail | 1983 |
| Truro Timber Frame Ltd | Manufacturing | 2010 |
| Truscott Construction and Plant Hire Ltd | Construction | 2025 |
| TSD Europe Holdings Limited | Financial services | 2024 |
| TSD Holding Limited | Financial services | 2017 |
| TSD UK Holdings Limited | Financial services | 2024 |
| TSD USA Holdings Limited | Financial services | 2024 |
| Tstreet 3 Ltd | Real estate | 2024 |
| Turtle Tots Plymouth Limited | Education | 2026 |
| Tyrer Consulting Ltd | Professional & scientific | 2020 |
| Ugborough Parish at Your Convenience CIC | Other services | 2024 |
| Unique Barbers IVY Ltd | Other services | 2025 |
| Unit 8 Gym Ltd | Arts & recreation | 2021 |