| Stir to Action Ltd | Information & communication | 2012 |
| Stonecroft Stained Glass Ltd | Construction | 2023 |
| Stonemasons of Dorset Ltd | Construction | 2017 |
| Stowaway London Ltd | Wholesale & retail | 2015 |
| Stowford Homes Limited | Construction | 1985 |
| Stuart Models (UK) Limited | Manufacturing | 2012 |
| Stubbs Security Limited | Administrative & support | 2023 |
| Style & Wonder Events Ltd | Administrative & support | 2026 |
| Subway Slim Limited | Other services | 2011 |
| Sundorbon Brothers Ltd | Hospitality | 2019 |
| Sunlake High-End Enterprise Corporation Limited | Administrative & support | 2020 |
| Supper Club 10B Ltd | Hospitality | 2018 |
| Survive Alive Limited | Health & social care | 2004 |
| Sustainable Building Consultancy Limited | Professional & scientific | 2024 |
| Sustainable Foody Limited | Professional & scientific | 2025 |
| Sustainable Stationery Limited | Extraterritorial | 2023 |
| Symondsbury Farms Limited | Agriculture & fishing | 1960 |
| T&T Fishing Ltd | Agriculture & fishing | 2025 |
| T. M. Foot Holdings Limited | Hospitality | 2019 |
| T.C Fishing Ltd | Agriculture & fishing | 2019 |
| Taddle Farm Tents Limited | Administrative & support | 2019 |
| Talking Loud Film Limited | Information & communication | 2019 |
| Tamarind Catering Ltd | Hospitality | 2023 |
| Tannery Place Bridport Management Limited | Real estate | 2015 |
| Tavern Cottage Management Company Ltd | Households | 2020 |
| Tax Volunteers | Financial services | 2003 |
| TEH Labs Ltd | Information & communication | 2021 |
| Tempus Windows Ltd | Construction | 2022 |
| TEN Motors Ltd | Wholesale & retail | 2024 |
| TEN Trees Limited | Agriculture & fishing | 2021 |
| TES Consulting (Bridport) Limited | Information & communication | 2021 |
| TG Quality and Safety Management Ltd | Administrative & support | 2018 |
| THE Art of Travel 1 Limited | Information & communication | 2021 |
| THE Avalon School of Yoga Limited | Arts & recreation | 2022 |
| THE Baby Studio Limited | Wholesale & retail | 2010 |
| THE Bell Cliff Restaurant Limited | Hospitality | 2007 |
| THE Brawn Consultancy Ltd | Professional & scientific | 2025 |
| THE Carriers Bude Ltd | Hospitality | 2014 |
| THE Centre for Livelihoods, Ecosystems, Energy, Adaptation and Resilience in the Caribbean Limited | Professional & scientific | 2016 |
| THE Diary Publishing Limited | Information & communication | 2009 |
| THE Dorset Farm Fencing Limited | Manufacturing | 2024 |
| THE Dorset Fencing Company Ltd | Construction | 2025 |
| THE Dorset Pedlar Ltd | Wholesale & retail | 2020 |
| THE Drinks Accelerator Ltd | Professional & scientific | 2023 |
| THE Edible Acre Ltd | Agriculture & fishing | 2022 |
| THE Electric PUB Company Limited | Hospitality | 2019 |
| THE Electro Organic Sound Continuum Limited | Information & communication | 2013 |
| THE Gentri Company Ltd | Wholesale & retail | 2020 |
| THE Gibson Collection Ltd | Hospitality | 2023 |
| THE Gnarly Tree Food Events Ltd | Hospitality | 2025 |
| THE Greek Cat Welfare Society (UK) | Extraterritorial | 1991 |
| THE Gunz Barbers Ltd | Other services | 2020 |
| THE Hartland Press Limited | Information & communication | 1990 |
| THE Heard Community CIC | Education | 2026 |
| THE Hema Group Ltd | Professional & scientific | 2022 |
| THE Hippy BAG Company Limited | Wholesale & retail | 2013 |
| THE Hurt Locker Bridport Ltd | Arts & recreation | 2020 |
| THE Jawbone Collective CIC | Information & communication | 2024 |
| THE Kindness of YOU (Tkoy) Ltd | Wholesale & retail | 2023 |
| THE Linen Yard Management Company Limited | Real estate | 2014 |
| THE Mattingley Restoration Company Limited | Professional & scientific | 2006 |
| THE Maya Tiger Film Limited | Information & communication | 2018 |
| THE Milton Abbas PUB Company Limited | Hospitality | 2006 |
| THE Old Ways Farming Limited | Agriculture & fishing | 2015 |
| THE Open Theology Trust | Education | 1987 |
| THE Othona Community | Other services | 2012 |
| THE OWL & the Apothecary Ltd. | Wholesale & retail | 2015 |
| THE Parlour Bredy Farm Limited Partnership | | 2019 |
| THE Parlour Pizzeria - West Bay Ltd | Hospitality | 2026 |
| THE Pasture Raised EGG Co Ltd | Agriculture & fishing | 2026 |
| THE Peasant Evolution Producers Cooperative | Agriculture & fishing | 2006 |
| THE Portland Scallop Company Ltd | Wholesale & retail | 2003 |
| THE Principle Nameplate Company Limited | Manufacturing | 2000 |
| THE Property Company Holdings Limited | Real estate | 2015 |
| THE Pursuit of Hoppiness Ltd | Hospitality | 2022 |
| THE Rock Partnership Ltd. | Professional & scientific | 2009 |
| THE Salon (Charmouth) Limited | Other services | 2012 |
| THE Sandbagos Limited | Information & communication | 2024 |
| THE Seagulls Restaurant Limited | Hospitality | 2004 |
| THE Seaside Company Dorset Limited | Hospitality | 2007 |
| THE Seaweed People Ltd | Manufacturing | 2022 |
| THE Smoke HUT Kitchen & Grill Ltd | Hospitality | 2023 |
| THE Software Vendor Executive Network Ltd | Administrative & support | 2024 |
| THE Somerset and Dorset Railway Trust Ltd. | Arts & recreation | 2014 |
| THE Toddler Gift Company Limited | Wholesale & retail | 2024 |
| THE Twisting Rooms Limited | Administrative & support | 2016 |
| THE Vale PUB Co Ltd | Hospitality | 2024 |
| Thee Vestments Ltd. | Wholesale & retail | 2013 |
| Theo Green Designs Limited | Professional & scientific | 2014 |
| Three Counties International Transport Ltd | Agriculture & fishing | 2010 |
| Thriving Wild CIC | Education | 2024 |
| Tiki Bar Westbay Limited | Hospitality | 2024 |
| TIM Williams Osteopaths Limited | Health & social care | 2011 |
| Tipsy Box Bar Ltd | Hospitality | 2022 |
| Toilet Patents Ltd | Administrative & support | 2025 |
| TOM RAY Tractor and Plant Machinery Limited | Wholesale & retail | 2024 |
| Tommie Malpas Ltd | Construction | 2023 |
| Top Babrers 27 Ltd | Other services | 2025 |
| Topsparks (UK) Limited | Construction | 2006 |
| Totem Health Limited | Health & social care | 2022 |