| Sunny Days Honiton Limited | Health & social care | 2016 |
| Sunnywey Apartments Management Company Limited | Households | 2008 |
| Sunset Blvd Limited | Other services | 2022 |
| Sunshine Cafe Ltd | Administrative & support | 2002 |
| Supanova (Holdings) Limited | Agriculture & fishing | 2014 |
| Supportmanager Ltd | Information & communication | 2025 |
| Suresnes Limited | Real estate | 2001 |
| Surface Coating Limited | Administrative & support | 2024 |
| Surprise Dart Box Ltd | Wholesale & retail | 2026 |
| Survey Centre Ltd | Professional & scientific | 2024 |
| Survey Point Ltd | Professional & scientific | 2023 |
| Sutch Property LLP | | 2024 |
| Sutton Poyntz C.I.C. | Other services | 2014 |
| Svalin Geoscience Limited | Mining & quarrying | 2012 |
| SVS Venture Ltd | Hospitality | 2021 |
| SW Coast Refills Limited | Wholesale & retail | 2019 |
| SW Liquid Screed & Spray Rendering Ltd | Construction | 2022 |
| Sweet Corner Ltd | Wholesale & retail | 2026 |
| Sweet Kitchen Weymouth Limited | Wholesale & retail | 2022 |
| Swift Dynamics Transport Ltd | Transport & logistics | 2025 |
| Swift Fishing Tackle (Kingsteignton) Ltd | Wholesale & retail | 2011 |
| Swiftwey Limited | Real estate | 2001 |
| Syde Limited | Information & communication | 2026 |
| Sylvan Brae Management Company Limited | Households | 2015 |
| Sylvia Property UK Ltd | Real estate | 2023 |
| Synthotech Group Limited | Manufacturing | 2011 |
| T&Ac Holdings Limited | Financial services | 2025 |
| T&F Consulting Limited | Professional & scientific | 2025 |
| T.T.Catering Limited | Hospitality | 2016 |
| T3 Electrical Limited | Construction | 2014 |
| TAB Property Consultancy Ltd | Real estate | 2021 |
| Tabletop Sidekick Events Ltd | Arts & recreation | 2025 |
| Tacklewave Limited | Wholesale & retail | 2010 |
| Tahnee's Hair & Beauty Studio Limited | Other services | 2010 |
| Talamore Group Limited | Financial services | 2022 |
| Tallowsand Ltd | Professional & scientific | 2019 |
| Tanglewood Holiday Park Limited | Hospitality | 2003 |
| Tapeland Limited | Real estate | 2002 |
| Targetbound Sports Ltd | Manufacturing | 2021 |
| Tarrant Sporting Services Limited | Arts & recreation | 2000 |
| Taylor Mowbray LLP | | 2008 |
| Taylor's Garage & Quality Used Cars Limited | Wholesale & retail | 2012 |
| Taylor's Investments Dorset Limited | Real estate | 2022 |
| Taylor’S Family Butchers Ltd | Wholesale & retail | 2016 |
| TBT Aesthetics Limited | Health & social care | 2023 |
| TCC the Carp Cast UK Ltd | Information & communication | 2026 |
| TCL Weymouth Ltd | Arts & recreation | 2021 |
| TDB Supply Solutions Ltd | Wholesale & retail | 2010 |
| Tecan Limited | Manufacturing | 2008 |
| Tech Genius IT Solutions Ltd | Information & communication | 2017 |
| Techboy Ltd | Other services | 2024 |
| TEH Properties Ltd | Real estate | 2019 |
| TEK Clad Limited | Construction | 2012 |
| Telos Ltd | Information & communication | 2017 |
| Tenancy Support Solutions Ltd | Real estate | 2025 |
| Teqniqal Solutions Limited | Administrative & support | 2012 |
| Term Investments Limited | Financial services | 2011 |
| Terowie Projects Limited | Professional & scientific | 2013 |
| Tggardening Ltd | Administrative & support | 2024 |
| Thai Sugar Cane Ltd | Hospitality | 2023 |
| That Book Box Ltd | Wholesale & retail | 2023 |
| THE Abbotsbury Hotel Limited | Hospitality | 2025 |
| THE Arne Oyster Company Limited | Wholesale & retail | 2019 |
| THE Art of Air Farce One Limited | Extraterritorial | 2007 |
| THE Barking Lounge Limited | Other services | 2021 |
| THE Beachfront Company (Weymouth) Limited | Hospitality | 2025 |
| THE Bestofjoys Limited | Wholesale & retail | 2026 |
| THE Blues Club Portland Limited | Hospitality | 2023 |
| THE Boating Centre Limited | Transport & logistics | 2006 |
| THE Bounce Pawtrol Ltd | Education | 2024 |
| THE Cambridge Clinic Ltd | Manufacturing | 2011 |
| THE Camper Way Limited | Wholesale & retail | 2021 |
| THE Car Garden Limited | Wholesale & retail | 2008 |
| THE Car Shop Dorchester Ltd | Wholesale & retail | 2025 |
| THE Carbon Group (SW) Limited | Professional & scientific | 2018 |
| THE Carpet Company (Dorchester) Ltd | Wholesale & retail | 2017 |
| THE Carpet Company (SW) Ltd | Construction | 2013 |
| THE Carpetman 2020 Ltd | Wholesale & retail | 2019 |
| THE Classic Car Hire Company Limited | Administrative & support | 2016 |
| THE Corner House Two Limited | Hospitality | 2022 |
| THE Cove Inn Ltd | Hospitality | 2010 |
| THE Darkening Ltd | Arts & recreation | 2024 |
| THE Death Planner Ltd | Other services | 2021 |
| THE Digital Doctor Solutions Ltd | Professional & scientific | 2025 |
| THE Diigitals Ltd | Arts & recreation | 2018 |
| THE Dorset Burger Company Ltd | Hospitality | 2012 |
| THE Dorset Retreat Ltd | Health & social care | 2026 |
| THE Drawbridge Asset Management Ltd | Real estate | 2026 |
| THE Drawbridge Capital Group Ltd | Financial services | 2025 |
| THE Drawbridge Capital Ltd | Financial services | 2025 |
| THE Drawbridge Media Ltd | Education | 2025 |
| THE Emporium Weymouth Limited | Wholesale & retail | 2020 |
| THE Engine Room Fitness Dorset Limited | Education | 2024 |
| THE Esplanade Hotel Weymouth Limited | Hospitality | 2007 |
| THE Espresso Coffee Company Limited | Wholesale & retail | 2016 |
| THE Falcon Hotel (Bude) Limited | Financial services | 1998 |
| THE Foal & Pheasant Limited | Hospitality | 2021 |
| THE Galley Bistro Weymouth Limited | Hospitality | 2014 |
| THE Gardeners Retreat Limited | Hospitality | 2016 |
| THE George Bar & Grill Limited | Hospitality | 2010 |