| Timedream Trade Limited | Wholesale & retail | 2023 |
| Timeless Legacy Limited | Health & social care | 2014 |
| Timeside Couriers Ltd | Transport & logistics | 2018 |
| Tiny Oceanhealth Insights Limited | Professional & scientific | 2024 |
| Tisdall Property Ltd | Real estate | 2025 |
| Titan Mechanical & Electrical UK Ltd. | Other services | 2018 |
| Titan Property Maintenance Ltd | Administrative & support | 2018 |
| Titmouse Properties Limited | Real estate | 2026 |
| Titus Property Solutions Ltd | Real estate | 2015 |
| TJ Barbers & Salon Limited | Other services | 2022 |
| TJ Forever Solar Ltd | Construction | 2023 |
| TJ Pearce Limited | Other services | 2025 |
| TJ Properties (SW) Limited | Real estate | 1996 |
| Tj's Trading Cards Limited | Information & communication | 2024 |
| TJA Transport Ltd | Transport & logistics | 2016 |
| TJL Group Ltd | Transport & logistics | 2025 |
| TJX Consulting Ltd | Professional & scientific | 2021 |
| TKW Properties Limited | Real estate | 2016 |
| Tl;Dr Agency Limited | Professional & scientific | 2016 |
| Tl;Dr Brands Ltd | Wholesale & retail | 2025 |
| TLC Property Group (SW) Limited | Real estate | 2017 |
| TLW Plant & Contracting Limited | Administrative & support | 2010 |
| TM FX Trading Ltd | Financial services | 2026 |
| TM Service Station Limited | Wholesale & retail | 2025 |
| TMA International Limited | Information & communication | 2013 |
| TMA Sports Management Ltd | Administrative & support | 2020 |
| TMC Construction & Management Ltd | Manufacturing | 2022 |
| TMG Holdings (SW) Limited | Real estate | 2017 |
| TMP Projects UK Ltd | Manufacturing | 2021 |
| TMW Property Developments Ltd | Real estate | 2025 |
| TN Petroleum (Ambalam) Ltd | Wholesale & retail | 2026 |
| TNT Theatre Ltd | Education | 2000 |
| Tntjb Marine Limited | Manufacturing | 2022 |
| Today Kebab House Ltd | Hospitality | 2025 |
| Today's Kebab Restaurant Ltd | Hospitality | 2023 |
| Today’S Fashion House Limited | Wholesale & retail | 2025 |
| Tofasgrace Solution Limited | Water & waste | 2024 |
| Together Enabled Ltd | Education | 2025 |
| TOGETHER4CARE Recruitment Ltd | Administrative & support | 2026 |
| Tokleywholesales Ltd | Wholesale & retail | 2022 |
| Tolulope Healthcare Agency Ltd | Health & social care | 2025 |
| TOM & Tina at the Church House Inn Limited | Hospitality | 2022 |
| TOM Carder Media Ltd | Information & communication | 2022 |
| TOM Dooley's Ltd | Manufacturing | 2021 |
| TOM Evans Carpentry and Building Limited | Construction | 2024 |
| TOM French & Associates Limited | Financial services | 1997 |
| TOM Gilbert PT Ltd | Arts & recreation | 2022 |
| TOM Pearce (Plymouth) Ltd | Wholesale & retail | 2020 |
| TOM Pearce Holdings Ltd | Transport & logistics | 2023 |
| TOM Piper Hair Ltd | Other services | 2020 |
| TOM Trains Ltd | Information & communication | 2015 |
| TOM Yorke Ltd | Financial services | 2021 |
| Tommy Tukker Electrical Installations Ltd | Construction | 2024 |
| Tomo Holdings Limited | Financial services | 2025 |
| Tones Media Limited | Information & communication | 2026 |
| Tones Studios Limited | Information & communication | 2026 |
| Tony Hole Marine SW Limited | Manufacturing | 2014 |
| Tony Jopson & Co Limited | Professional & scientific | 2003 |
| Tony Pearce Consultancy Services Ltd | Administrative & support | 2017 |
| Tony Richardson Ltd | Health & social care | 2025 |
| Tony Wainwright Ltd | Professional & scientific | 2013 |
| Tony Yacht Limited | Professional & scientific | 2018 |
| Tooltech Limited | Manufacturing | 1997 |
| Top Banana Education Ltd | Education | 2012 |
| Top Barbers Plymouth Ltd | Other services | 2023 |
| Top China 858 Limited | Hospitality | 2023 |
| Top CUT Barbers Stoke Limited | Other services | 2025 |
| Top Hand Car Wash (SW) Ltd | Administrative & support | 2024 |
| Top Quality Cleaning Services Limited | Administrative & support | 2024 |
| Top Spec Building Ltd | Construction | 2020 |
| Top Spec Building Maintenance Ltd | Construction | 2024 |
| Top Tile Roofing Specialists Ltd | Construction | 2025 |
| Top to Bottom Squeaky Clean Ltd | Administrative & support | 2020 |
| Topcat Scaffolding Limited | Construction | 2020 |
| Topdat Ltd | Manufacturing | 2024 |
| Tope Ocean Ltd | Manufacturing | 2023 |
| Topform Asset Holdings Limited | Financial services | 2024 |
| Topup Software Limited | Information & communication | 2006 |
| TOR Bridge Academy Trust | Education | 2011 |
| TOR Finance Ltd | Financial services | 2006 |
| TOR View Clinical Rooms Ltd | Real estate | 2024 |
| Tora Cycles Ltd | Manufacturing | 2020 |
| Torbay Groundworks Ltd | Construction | 2025 |
| Torbridge Capital Limited | Health & social care | 2018 |
| Torcare (Holdings) Limited | Health & social care | 2013 |
| Torcare Limited | Health & social care | 1986 |
| Torpoint Fitness & Strength Gym Ltd | Arts & recreation | 2020 |
| Torpoint Kebab Ltd | Hospitality | 2020 |
| Torpoint MOT Ltd | Wholesale & retail | 2015 |
| Torpoint Style Ltd | Other services | 2019 |
| Torpoint Tyres Ltd | Wholesale & retail | 2015 |
| Torpoint Yacht Harbour Limited | Administrative & support | 2015 |
| Torr Farm Cottages Management Limited | Households | 1999 |
| Torre Marine Management Company Limited | Households | 2007 |
| Torridge PG Ltd | Hospitality | 2025 |
| Torridge PGH Ltd | Hospitality | 2025 |
| Torridge PGP Ltd | Hospitality | 2026 |
| Torrington Court Management Company Limited | Real estate | 1995 |
| Tortora Holdings Ltd | Real estate | 2022 |
| Torwood Investments Ltd | Real estate | 2026 |