| T King Brickwork Ltd | Construction | 2025 |
| T&Co. Plumbing Ltd | Construction | 2026 |
| Talisman ADC Limited | Extraterritorial | 2015 |
| Talo Holdings Limited | Administrative & support | 2019 |
| Tangerine FOX Limited | Information & communication | 2017 |
| Tangerine Grove Ltd | Information & communication | 2024 |
| Tasteful Partners Holdings Ltd | Financial services | 2020 |
| Tayel Ltd | Real estate | 2026 |
| Taylor Property Services Ltd | Real estate | 2024 |
| TD Landscaping & Fencing Limited | Administrative & support | 2013 |
| Tdpr Consulting Ltd | Professional & scientific | 2024 |
| Tdpr Limited | Professional & scientific | 2024 |
| Teak Plus Ltd | Construction | 2024 |
| Tempest Training Ltd. | Education | 2014 |
| Terrain TEC Limited | Extraterritorial | 2017 |
| Tgyb Ltd | Hospitality | 2023 |
| Thai Jasmine Restaurant Ltd | Hospitality | 2019 |
| That's My Girl Ltd | Wholesale & retail | 2018 |
| THE Aroha Holdings Ltd | Real estate | 2025 |
| THE Bear at Wareham Ltd | Hospitality | 2018 |
| THE Castle Inn Corfe Ltd | Hospitality | 2024 |
| THE Christmas Fairies Ltd | Wholesale & retail | 2026 |
| THE Create Group Limited | Professional & scientific | 2001 |
| THE Cutting Crew (Wool) Limited | Other services | 2012 |
| THE Dorset Flapjack Company Ltd. | Manufacturing | 2008 |
| THE Dorset Hamper Company Ltd | Wholesale & retail | 2025 |
| THE Dorset Meat Company Ltd | Wholesale & retail | 2013 |
| THE Event ARK Ltd | Administrative & support | 2014 |
| THE Fired UP Hospitality Group Limited | Hospitality | 2020 |
| THE Hotel Clearance Company Ltd | Wholesale & retail | 2020 |
| THE Human Edge - Earned Ltd | Administrative & support | 2026 |
| THE JIM Cronin Memorial Fund for Primate Welfare and Conservation | Education | 2008 |
| THE Kimmeridge Trust | Education | 2004 |
| THE Monsoon Restaurant (Wareham) Ltd | Hospitality | 2018 |
| THE Partnr Ship Ltd | Professional & scientific | 2018 |
| THE Salt Water Grill Ltd | Hospitality | 2020 |
| THE Sanctuary People Limited | Public administration | 2000 |
| THE Tank Museum Limited | Arts & recreation | 2003 |
| THE Tank Museum Trading Company Limited | Arts & recreation | 1988 |
| THE Veterans Forge CIC | Health & social care | 2017 |
| THE Wellington 1815 Ltd | Hospitality | 2025 |
| THE Westminster Wire Factory Limited | Manufacturing | 1998 |
| Theappcompany Ltd | Information & communication | 2025 |
| Thirteen Projects Limited | Real estate | 2022 |
| Thirteen Restaurant Ltd | Hospitality | 2020 |
| Tholstrup Motorcars Limited | Wholesale & retail | 2023 |
| Thomas & Rawson Limited | Real estate | 2009 |
| Thomas Harvey Ltd | Manufacturing | 2023 |
| TIGRCZ86 Ltd | Wholesale & retail | 2024 |
| Tin-Box Music Limited | Information & communication | 2014 |
| Tiyan Ltd | Administrative & support | 2020 |
| TMW Enterprises Limited | Real estate | 1998 |
| Tourle Developments Ltd | Construction | 2025 |
| Tourle Investments Limited | Financial services | 2013 |
| Tourle Planning Services Limited | Professional & scientific | 2017 |
| Tower Lettings Limited | Real estate | 2001 |
| Tower Power Energy Solutions Ltd | Construction | 2023 |
| TP Webley Ltd | Professional & scientific | 2024 |
| Trade Glaze (Southern) Ltd | Construction | 2022 |
| Tradewind Graphics Limited | Manufacturing | 2014 |
| Trayfoot Ltd | Information & communication | 2026 |
| Treasurefound Limited | Professional & scientific | 2018 |
| Tsom Ltd | Hospitality | 2025 |
| Turberville & Co. Ltd | Real estate | 2022 |
| TVA Group Ltd | Information & communication | 2017 |
| TVS247 Ltd | Wholesale & retail | 2009 |
| Tyneham Consulting Limited | Information & communication | 2024 |
| Typerocker Ltd | Professional & scientific | 2025 |
| UK K Barbershop Ltd | Other services | 2026 |
| UK Tiles Direct Ltd | Construction | 2006 |
| Ultimate Plastering & Drylining Limited | Construction | 2013 |
| Ultrav Poole Ltd | Other services | 2018 |
| Ultrav Southampton Ltd | Other services | 2022 |
| Ultrav Totton Ltd | Other services | 2013 |
| Vibrant Earth Ltd | Extraterritorial | 2012 |
| Vida Physiotherapy Ltd | Health & social care | 2023 |
| Vivian Court Management Company Limited | Real estate | 2005 |
| Voltron Electrical Ltd | Construction | 2025 |
| W Pond Ltd | Wholesale & retail | 2023 |
| Wardright Plumb & Build Ltd | Construction | 2025 |
| Wareham and District Development Trust | Other services | 2002 |
| Wareham Barbers Ltd | Other services | 2023 |
| Wareham Cottage Bakery Limited | Wholesale & retail | 2019 |
| Wareham Mooring Company Ltd | Other services | 2005 |
| Wareham Nails Ltd | Other services | 2026 |
| Wareham Partners Ltd | Professional & scientific | 2018 |
| Wareham Quay River Cruises Ltd | Transport & logistics | 2022 |
| Wareham River Boat Hire Ltd | Administrative & support | 2023 |
| Waterson Property Ltd | Real estate | 2022 |
| Watson & SON Holdings Ltd | Professional & scientific | 2018 |
| WBF Estate & Co Ltd | Real estate | 2024 |
| Webber & Etches Limited | Construction | 1979 |
| Weld Estate Trustees Limited | Extraterritorial | 2018 |
| Weld Property Group Ltd | Real estate | 2024 |
| Weld Property Holdings Ltd | Real estate | 2024 |
| Weld Property Investments Limited | Real estate | 2024 |
| Wessex Asset Management Ltd | Professional & scientific | 2018 |
| Wessex BNG Limited | Professional & scientific | 2025 |
| West Mill Management Co Ltd | Real estate | 2024 |
| West Street Management Ltd | Households | 2020 |