| THE Venue Plymouth Limited | Wholesale & retail | 2019 |
| THE Victoria Freehold Company (Plymouth) Ltd | Households | 2011 |
| THE Victoria RTM Company Limited | Households | 2004 |
| THE Village Restaurant Plymouth Limited | Hospitality | 2015 |
| THE Walled Garden (Manadon) Management Company Limited | Households | 2001 |
| THE Warrior Within Project UK CIC | Other services | 2024 |
| THE Webhosting Group Limited | Information & communication | 2016 |
| THE Wedding Company (South West) Limited | Wholesale & retail | 2012 |
| THE Wheel Training Company | Education | 2016 |
| THE White Bell Luxury Property Management Ltd | Real estate | 2016 |
| THE Whopper Boys Ltd | Hospitality | 2025 |
| THE Wildcat Collection Ltd | Wholesale & retail | 2001 |
| THE Will Centre Limited | Professional & scientific | 2004 |
| THE Windmill (Plymouth) Ltd | Hospitality | 2010 |
| THE Woodside PUB Limited | Hospitality | 2023 |
| THE Work Inclusion Project Ltd | Administrative & support | 2020 |
| THE Workshop(Sw) Ltd | Other services | 2024 |
| THE Wright Barber Limited | Other services | 2019 |
| THE Wylde PUB Company Ltd | Hospitality | 2019 |
| THE Yealmpton Show Limited | Other services | 1996 |
| THE Yealmpton Woodland Burial Association | Other services | 2013 |
| THE Zebra Collective C.I.C. | Professional & scientific | 2003 |
| THE Zone Callington Ltd | Arts & recreation | 2021 |
| Thealfaindustries Ltd | Administrative & support | 2025 |
| Theatre Royal (Plymouth) Limited | Arts & recreation | 1981 |
| Theatre Stories CIC | Arts & recreation | 2021 |
| Theatre Tots CIC | Education | 2008 |
| Thebirdiebox Ltd | Wholesale & retail | 2025 |
| Thedesignhub Ltd | Wholesale & retail | 2016 |
| Thedevonkitchencompany Limited | Wholesale & retail | 2023 |
| Theearlwoolwich Ltd | Hospitality | 2025 |
| Theland Investments Limited | Real estate | 2022 |
| Theleaseoflife Ltd | Real estate | 2025 |
| Theniceslice Ltd | Manufacturing | 2025 |
| Thepeardrops Ltd | Wholesale & retail | 2019 |
| Therapy Hair Ltd | Other services | 2024 |
| Thermaglaze Southwest Limited | Manufacturing | 2023 |
| Thessygeneralstore Limited | Hospitality | 2025 |
| Theswimsuitguy Limited | Arts & recreation | 2026 |
| Think Financial Planning Ltd | Financial services | 2024 |
| Thinking Bookkeeping Limited | Administrative & support | 2007 |
| Thinking Cloud Accounting Ltd | Professional & scientific | 2017 |
| Thinking Finance Limited | Professional & scientific | 2005 |
| Thinking Property Limited | Professional & scientific | 2008 |
| Thinking Tax Limited | Professional & scientific | 2006 |
| Thinqtanq Plymouth Ltd | Real estate | 2012 |
| Thirst Fitness Ltd | Other services | 2023 |
| Thirsty for Knowledge Ltd | Professional & scientific | 2023 |
| This Earth Ltd | Wholesale & retail | 2015 |
| This Time Next Year SW Ltd | Real estate | 2016 |
| This-Camera Ltd | Professional & scientific | 2024 |
| Thistle Park Garage Limited | Wholesale & retail | 1997 |
| Thomas Baizire Ltd | Transport & logistics | 2022 |
| Thomas Martins Healthcare Limited | Health & social care | 2011 |
| Thomas Read Homes Limited | Real estate | 2021 |
| Thompson & Jackson Solicitors LLP | | 2016 |
| Thompson Body Repair Ltd. | Wholesale & retail | 2014 |
| Thomson Independent Traders Limited | Extraterritorial | 1999 |
| Thor Property Solutions Ltd | Construction | 2021 |
| Thorn Park (Plymouth) Management Company Limited | Households | 2005 |
| Thorn Park Court Management Limited | Households | 2006 |
| Thorn Tech Ltd | Information & communication | 2019 |
| Thornarep Limited | Health & social care | 1984 |
| Thornbury Manufacturing Limited | Manufacturing | 1995 |
| Thornbury Windows Ltd | Construction | 2021 |
| Thornfield Land Limited | Real estate | 2018 |
| Thornhill Healthcare Events Ltd | Health & social care | 2018 |
| Thornton Bespoke Travel Ltd | Administrative & support | 2022 |
| Thornton's Property Investments Ltd | Real estate | 2025 |
| Thors Engineering Ltd | Professional & scientific | 2024 |
| Thpp Management Company Limited | Households | 2012 |
| Three Duvets Limited | Wholesale & retail | 2021 |
| Three Hurdwick Place Limited | Households | 2015 |
| Three Sixty Mortgages Limited | Financial services | 2018 |
| Three Towns Ltd | Manufacturing | 2024 |
| Three Wolf Moon Limited | Information & communication | 2015 |
| Thrice Services Limited | Wholesale & retail | 2024 |
| Thrive Financial Solutions & Consultancy Limited | Administrative & support | 2021 |
| Thrive Organisational Health Ltd | Information & communication | 2025 |
| Thrive Poultry CIC | Agriculture & fishing | 2026 |
| Thrive Recruitment Group Plymouth Ltd | Administrative & support | 2024 |
| Thru-Floor Ltd | Construction | 2013 |
| Thyme & Tide (Cornwall) Ltd | Hospitality | 2025 |
| Tiandea Ltd | Wholesale & retail | 2015 |
| Tiannah Global Limited | Wholesale & retail | 2025 |
| Tide and Timber Developments Ltd | Construction | 2026 |
| Tiger Property Services Ltd | Construction | 2026 |
| Tiger Renewable Solutions Ltd | Manufacturing | 2025 |
| Tiles and Paint Limited | Wholesale & retail | 2012 |
| Tilford Southwest Ltd | Real estate | 2025 |
| TIM Frederick Ltd | Real estate | 2022 |
| TIM Lowe Building Solutions Limited | Construction | 2011 |
| TIM Norman Ltd | Professional & scientific | 2025 |
| Timber Land Saltash SW Ltd | Wholesale & retail | 2025 |
| Timber PAK (SW) Ltd | Wholesale & retail | 2016 |
| Timbramsum Property Limited | Real estate | 2022 |
| Time and Chance Motion Pictures Ltd | Extraterritorial | 2014 |
| Time Chamber Ltd | Information & communication | 2025 |
| Time Management (UK) Ltd | Hospitality | 2006 |
| TIME4CARE Recruitment Ltd | Administrative & support | 2023 |