| THE Lyme Bay Limited | Other services | 2016 |
| THE Manta Trust | Other services | 2011 |
| THE Middle East Risk and Cultural Advisory Group Limited | Administrative & support | 2021 |
| THE Motivation Experience Ltd | Education | 2018 |
| THE National Wildlife Garden Limited | Arts & recreation | 2017 |
| THE Neuro Balance Centre Ltd | Other services | 2019 |
| THE New Office Network Ltd | Professional & scientific | 2016 |
| THE Notorious Nooch Company Limited | Wholesale & retail | 2020 |
| THE Old Power Station Limited | Real estate | 2025 |
| THE Old Rectory Dorset Limited | Hospitality | 2012 |
| THE Optostudio Limited | Administrative & support | 2014 |
| THE Orange Butter Co Ltd | Hospitality | 2025 |
| THE Orchards Frampton Management Limited | Households | 2002 |
| THE Pantry Cafe Limited | Hospitality | 2018 |
| THE Parlour Cafe and Restaurant (Dorset) Limited | Hospitality | 2024 |
| THE Pavilion (Poundbury) Management Company Limited | Households | 2024 |
| THE Pet Shop (Dorchester) Limited | Wholesale & retail | 2006 |
| THE Pines (Management) Weymouth Limited | Households | 1993 |
| THE Poundbury Practice Ltd | Health & social care | 2025 |
| THE Present (Dorchester) Ltd | Wholesale & retail | 2019 |
| THE Property Collective Network Ltd | Other services | 2026 |
| THE Raised BED Company Limited | Manufacturing | 2025 |
| THE Ranch Xtreme Limited | Education | 2024 |
| THE Recovery Room Group Ltd | Other services | 2025 |
| THE Rein IT Inn Ltd | Hospitality | 2025 |
| THE Rhubarb Candle Company Ltd | Manufacturing | 2024 |
| THE Rosslyn Court Residents Association Limited | Households | 1993 |
| THE Sanctuary of Poundbury Ltd | Other services | 2026 |
| THE Saunders Management Company Limited | Households | 2007 |
| THE Shed Boutique Limited | Other services | 2013 |
| THE Shoe Room Dorchester Ltd | Wholesale & retail | 2026 |
| THE SLY Group Limited | Wholesale & retail | 2020 |
| THE Southern Sustainability Partnership Ltd | Professional & scientific | 2015 |
| THE Stables Management Company (Portland) Limited | Households | 2009 |
| THE Stratton House Freehold Company Ltd | Households | 2019 |
| THE Stroke Consultancy Ltd | Professional & scientific | 2026 |
| THE Thistle Trust | Administrative & support | 2002 |
| THE Thomas Hardy Society | Information & communication | 1967 |
| THE Travel Taylor Limited | Administrative & support | 2022 |
| THE Treasure Witney Limited | Wholesale & retail | 2015 |
| THE UK Rural Training Company Limited | Education | 2025 |
| THE Vintage Tool Shop Ltd | Wholesale & retail | 2017 |
| THE Watercress Company Limited | Agriculture & fishing | 1986 |
| THE Wedding Edition Limited | Hospitality | 2021 |
| THE Wild and Deadly Show Ltd | Arts & recreation | 2020 |
| THE Wild Partridge Limited | Wholesale & retail | 2025 |
| THE Willows (Pimperne) Management Company Limited | Households | 2008 |
| THE Wooden Floor Specialists (Dorset) Limited | Construction | 2021 |
| THE Wooden Floor Specialists (Holdings) Limited | Financial services | 2021 |
| THE Wooden Floor Specialists (London) Limited | Construction | 1998 |
| THE Wooden Floor Specialists (Property) Limited | Real estate | 2021 |
| THE Worth Partnership Ltd | Information & communication | 2019 |
| THE Youths Radiology Services Ltd | Health & social care | 2024 |
| Thebes Consulting Ltd | Professional & scientific | 2024 |
| Themagazineexpert Limited | Information & communication | 2015 |
| Therese Homes Ltd | Real estate | 2026 |
| Thermoloco Ltd | Construction | 2017 |
| Thevstr Ltd | Manufacturing | 2023 |
| THINK4WARD Ltd | Education | 2025 |
| Thomas J William Hair Design Limited | Other services | 2013 |
| Thomas Reid & Sons (Paisley) Limited | Manufacturing | 1980 |
| Thomson Interiors Ltd | Construction | 2017 |
| Thoresby Properties Limited | Professional & scientific | 2024 |
| Thorpe Farm Management Company Limited | Households | 2025 |
| Three Harbour View RTM Company Limited | Households | 2011 |
| Three Towns Cleaning Limited | Administrative & support | 2000 |
| Thursday Research Limited | Professional & scientific | 2024 |
| Thyme Music Ltd | Information & communication | 2025 |
| Thyssenkrupp Marine Systems LLP | | 2004 |
| Tidbury Consulting Ltd | Professional & scientific | 2025 |
| Tilia House (Dorchester) Management Company Limited | Households | 2016 |
| Tilia Solutions Limited | Professional & scientific | 2007 |
| Tillios Web Services Ltd | Information & communication | 2021 |
| TIM Martyn Building Supplies Limited | Wholesale & retail | 2010 |
| Time Home Services Ltd | Other services | 2025 |
| Time Retail Partners (France) Ltd. | Extraterritorial | 2016 |
| Time Retail Partners Limited | Real estate | 2015 |
| Times Global Express Ltd | Transport & logistics | 2024 |
| Timrick Limited | Administrative & support | 2008 |
| TIN Shack Motorcycles Ltd | Wholesale & retail | 2019 |
| Tincleton Ltd | Administrative & support | 2020 |
| Tincleton Solar Systems Limited | Manufacturing | 2022 |
| Tinners Ltd | Professional & scientific | 2020 |
| Tiny Giants TV Ltd | Information & communication | 2021 |
| TJ Bennett & Sons Limited | Hospitality | 2009 |
| Tkms Atlas UK (Holdings) Limited | Professional & scientific | 2005 |
| Tkms Atlas UK Limited | Public administration | 2005 |
| TMI Tolpuddle Ltd | Hospitality | 2023 |
| Tobin Sykes Ltd | Administrative & support | 2025 |
| Toka Marine Consultants Ltd | Administrative & support | 2009 |
| Toller Real Estate Ltd | Real estate | 2023 |
| Toller Tree Care Ltd | Agriculture & fishing | 2020 |
| Tolpuddle Old Chapel Trust | Construction | 2014 |
| TOM Robinson Hospitality Ltd | Hospitality | 2020 |
| Tomasz Graja Ltd | Health & social care | 2014 |
| Toni's Touch Ltd | Other services | 2023 |
| Tony Cramp Aviation Risk Management Limited | Professional & scientific | 2026 |
| Tookta Ltd | Households | 2024 |
| Tooms and Associates Limited | Wholesale & retail | 2013 |
| Top Wash Limited | Other services | 2016 |