| Star&Seed UN Limited | Hospitality | 2025 |
| Station Gym Limited | Arts & recreation | 2012 |
| Stellar Tax and Business Advisory Services Limited | Professional & scientific | 2013 |
| Stephens Butchers Limited | Wholesale & retail | 2003 |
| Stepping Stones Doble Ltd | Construction | 2014 |
| Stevens Business Analysis South West Limited | Information & communication | 2016 |
| Stockers Bagels Ltd | Hospitality | 2025 |
| Stonecrest Construction & Landscaping Ltd | Construction | 2023 |
| Strategic Healthcare Consulting Limited | Professional & scientific | 2025 |
| Streat WOK Limited | Hospitality | 2019 |
| Street Cellular | Wholesale & retail | 2003 |
| Sureguard Scaffold Products Ltd | Wholesale & retail | 2016 |
| Sweet Acre Nursery Ltd | Wholesale & retail | 2023 |
| Sweet Track Counselling Agency CIC | Health & social care | 2018 |
| Sweet Track Fitness Ltd | Arts & recreation | 2015 |
| Swynwraig Training Limited | Administrative & support | 2017 |
| Sycamore Developments Barton ST David Ltd | Construction | 2023 |
| T and C Auctions Glastonbury Ltd | Other services | 2024 |
| Tactic Organiser Limited | Information & communication | 2017 |
| Taka Industries Limited | Professional & scientific | 2012 |
| Talick Securities LLP | | 2010 |
| Talick Waste Limited | Wholesale & retail | 2016 |
| Tamsin Relly Studios Limited | Arts & recreation | 2013 |
| Tania Supported Living Limited | Health & social care | 2026 |
| Tatho Building Ltd | Construction | 2024 |
| Tax Organiser Limited | Professional & scientific | 2017 |
| Tax Press Ltd | Manufacturing | 2020 |
| Tea Chest Limited | Administrative & support | 2012 |
| Templine Limited | Construction | 2005 |
| Terraqueous Limited | Professional & scientific | 1997 |
| Tetramec Limited | Manufacturing | 2011 |
| Tgrcuk Limited | Wholesale & retail | 2025 |
| THE Avalon Community Centre CIC | Education | 2015 |
| THE BID Coach Ltd. | Professional & scientific | 2008 |
| THE Cafe at the Red Brick Limited | Hospitality | 2024 |
| THE Chalice Well Trust | Arts & recreation | 2012 |
| THE Chocolate Society Retail Ltd | Manufacturing | 2020 |
| THE Glastonbury Brewing Company Ltd | Manufacturing | 2018 |
| THE Glastonbury Drinks Company Limited | Manufacturing | 2017 |
| THE Goddess Conference LLP | | 2017 |
| THE Green Room Wines Limited | Wholesale & retail | 2023 |
| THE Happy HOG Roast Ltd | Hospitality | 2025 |
| THE Knitting Room Limited | Wholesale & retail | 2011 |
| THE Levels Road Management Company Limited | Real estate | 2012 |
| THE Mary and Margaret Charity | Arts & recreation | 2009 |
| THE Media Studios Ltd | Information & communication | 2015 |
| THE Oak @ Walton Ltd | Hospitality | 2018 |
| THE Old Clinic Limited | Real estate | 1997 |
| THE Pastures (Meare) Management Company Ltd | Households | 2019 |
| THE Pearson Group Limited | Information & communication | 2023 |
| THE Rectory Care Home Limited | Health & social care | 2016 |
| THE Red Lion (West Pennard) Ltd | Hospitality | 2014 |
| THE Sacred Birth Centre Ltd | Public administration | 2023 |
| THE Sleek Easy Clean Limited | Administrative & support | 2022 |
| THE Somerset Marshmallow Kitchen Ltd | Manufacturing | 2025 |
| THE Stag @ Cookswood Ltd | Extraterritorial | 2022 |
| THE Timber Frame Company Limited | Manufacturing | 1999 |
| THE Tool Machine Limited | Wholesale & retail | 2024 |
| THE TOR Collective Ltd | Other services | 2024 |
| THE Washing Well (Glastonbury) Ltd | Other services | 2023 |
| THE White Spring Glastonbury Community Interest Company | Water & waste | 2017 |
| Thebandbaja Limited | Arts & recreation | 2014 |
| Thecworx.Com Ltd | Professional & scientific | 2020 |
| Theurgia Ltd | Administrative & support | 2021 |
| Think Emerald Ltd | Health & social care | 2021 |
| Thirst Event Solutions Ltd | Hospitality | 2010 |
| Thistle & Olive Property Maintenance Ltd | Administrative & support | 2022 |
| Thomas & Thomas Building Contractors Limited | Construction | 2007 |
| Thompson Concept Art Limited | Arts & recreation | 2014 |
| Thorndown Limited | Manufacturing | 2017 |
| Thorndun House Management Co. Limited | Households | 2004 |
| Thorne Green Limited | Transport & logistics | 2019 |
| Three Dragons (LC) Limited | Professional & scientific | 2003 |
| Three Hill View (Glastonbury) Management Company Limited | Extraterritorial | 1999 |
| Thurley Capital Limited | Financial services | 2022 |
| Tibber Consulting Ltd | Professional & scientific | 2014 |
| Tidball Property Development Ltd | Construction | 2020 |
| Tileco Roofing Ltd | Wholesale & retail | 2019 |
| TIME4TRUCKS Ltd | Wholesale & retail | 2026 |
| Tiny Meedia Limited | Administrative & support | 2009 |
| TJW Property Services Limited | Construction | 2010 |
| TOM Saddington Limited | Wholesale & retail | 1996 |
| TOR Heating Services Ltd | Construction | 2020 |
| TOR Holdings Ltd | Wholesale & retail | 2017 |
| TOR Homes Ltd | Real estate | 2025 |
| TOR Marketing Limited | Professional & scientific | 2026 |
| TOR Sparks Ltd | Construction | 2012 |
| TOR Sport & Leisure Distribution Ltd | Wholesale & retail | 2024 |
| TOR Vapes Ltd | Wholesale & retail | 2025 |
| Torside Health & Wellness Ltd | Health & social care | 2021 |
| Torside Interiors Limited | Construction | 2019 |
| Torside Services Limited | Financial services | 2021 |
| Torview Limited | Hospitality | 2025 |
| TR Car Hire T/A 4X4 Vehicle Hire Bristol Limited | Administrative & support | 2025 |
| TRA PUB Ltd | Hospitality | 2025 |
| Traditional Timber Tradesmen Limited | Manufacturing | 2003 |
| Train Station Gym Limited | Arts & recreation | 2002 |
| Trevor Gilham Limited | Administrative & support | 2011 |
| Tribal Detox Europe Ltd | Other services | 2023 |
| Trimern Cleaning Ltd | Administrative & support | 2026 |