| Tagle Property Group Limited | Financial services | 2023 |
| TAL Dogs Ltd | Administrative & support | 2016 |
| TBT Events Limited | Wholesale & retail | 2024 |
| Tell 121 Limited | Financial services | 2022 |
| THE Barre Movement Ltd | Education | 2025 |
| THE Beauty Spot (Dumbarton) Ltd | Other services | 2011 |
| THE Bicycle Exchange G Code Ltd | Wholesale & retail | 2025 |
| THE Blind Company Scotland Ltd | Wholesale & retail | 2022 |
| THE Dumbarton Area Council on Alcohol | Health & social care | 1986 |
| THE Dumbarton Carpet Cleaner Limited | Administrative & support | 2025 |
| THE Dumbarton Castle Society | Other services | 2006 |
| THE Dumbarton Shipbuilding Company Ltd | Manufacturing | 2023 |
| THE Gentle-Man Cave Ltd | Other services | 2020 |
| THE Glenlivet Agencies Limited | Professional & scientific | 1964 |
| THE Glenlivet Distilleries Limited | Professional & scientific | 1951 |
| THE Glenlivet Mineral Water Company Limited | Professional & scientific | 1990 |
| THE Guid Kitchen CIC | Wholesale & retail | 2023 |
| THE Kindred Folk Ltd | Manufacturing | 2021 |
| THE Longmorn Distillery Limited | Professional & scientific | 1967 |
| THE Mafe Group Ltd | Real estate | 2022 |
| THE MJ Experience Ltd | Arts & recreation | 2026 |
| THE Pier Cafe Ltd | Hospitality | 2022 |
| THE Rental and Hire Company Limited | Administrative & support | 2021 |
| THE Rock Dental Laboratory Limited | Manufacturing | 2020 |
| THE Sailing Scotsman Ltd | Education | 2020 |
| THE Shire Leisure Group Ltd | Hospitality | 2024 |
| THE Sweetie Wives Ltd | Wholesale & retail | 2025 |
| THE Tell Organisation Limited | Education | 1989 |
| Thistle EPS Ltd | Education | 2025 |
| Thompson Agriculture Limited | Agriculture & fishing | 2026 |
| Thompson Concrete Products Limited | Construction | 2015 |
| Thompson Recycling & Landfill Limited | Water & waste | 2014 |
| Thorntons M.A. Ltd | Wholesale & retail | 2023 |
| Tilly Property Services Ltd | Real estate | 2021 |
| Timney Ltd | Information & communication | 2014 |
| TLK Management Services Limited | Construction | 2014 |
| Todd Capital Group Ltd | Education | 2017 |
| Tommy 1404 Ltd | Transport & logistics | 2025 |
| Top Peak Roofing & Building Limited | Construction | 2024 |
| Tots R US Nursery Ltd | Health & social care | 2021 |
| TR Scot Ltd | Hospitality | 2025 |
| Trail Goddess Ltd | Manufacturing | 2024 |
| Travel by Coach Ltd | Administrative & support | 2024 |
| Trola Ltd | Arts & recreation | 2023 |
| Tullochan | Health & social care | 2001 |
| Turkey Red Media Ltd. | Professional & scientific | 2017 |
| Turtle Tots West Glasgow & Renfrewshire Limited | Other services | 2015 |
| Twin Associates Ltd | Professional & scientific | 2019 |
| Under the Skin Aesthetics Ltd | Other services | 2026 |
| Unhinged Development Ltd | Information & communication | 2026 |
| United Kingdom Conformity Assessors Ltd | Professional & scientific | 2023 |
| USA Nail and Beauty Ltd | Other services | 2019 |
| V N Cherry Ltd | Wholesale & retail | 2026 |
| Vehicle Access Services 2009 Ltd | Transport & logistics | 2009 |
| Velmora Creation Ltd | Wholesale & retail | 2026 |
| Viewfield MOT Services Ltd | Wholesale & retail | 2025 |
| VIP Fade Ltd | Other services | 2026 |
| Virtual World Link Ltd | Information & communication | 2019 |
| VSR Stores Ltd | Wholesale & retail | 2022 |
| W&L Electrical Services Ltd | Construction | 2018 |
| W. Whiteley & Company, Limited | Professional & scientific | 1922 |
| WAC Management Ltd | Professional & scientific | 2021 |
| Wallace Power Services Ltd | Manufacturing | 2011 |
| Warehouse Asset Management Limited | Professional & scientific | 2012 |
| Warehouse Investment Holding Limited | Financial services | 2012 |
| WAREHOUSE.5 Limited | Wholesale & retail | 2015 |
| WDM Services Limited | Construction | 2015 |
| WE DO Travel Limited | Administrative & support | 2025 |
| West Coast Canyoning Limited | Arts & recreation | 2020 |
| West Dunbartonshire Energy LLP | | 2021 |
| West Dunbartonshire Muslim Education Society | Other services | 2001 |
| Westbridgend Garage Ltd. | Wholesale & retail | 2003 |
| What Flavours Ltd | Hospitality | 2025 |
| Whiteford Care Ltd | Health & social care | 2017 |
| Whiteleys Farm Ltd | Hospitality | 2021 |
| William Longmore & Company Limited | Professional & scientific | 1950 |
| William P. Whiland & SON Limited | Manufacturing | 1979 |
| Willowyard Limited | Professional & scientific | 1933 |
| Woods Discovery Investments Ltd | Wholesale & retail | 2024 |
| XIN XIN Glasgow Limited | Hospitality | 2019 |
| YDS Properties Limited | Real estate | 2024 |
| Yinjams Holdings Limited | Real estate | 2015 |
| You'Ll Love OUR Home Bakes Ltd | Manufacturing | 2014 |
| Yson Ltd | Wholesale & retail | 2021 |
| Yusma Group Ltd | Professional & scientific | 2025 |
| Zayaan Cuisine Ltd | Hospitality | 2025 |
| Zero Tech Ltd. | Information & communication | 2018 |
| Zeroinfosec Ltd | Information & communication | 2021 |
| ZN Lets Ltd | Real estate | 2025 |