| THE Limes Retirement Home Ltd | Health & social care | 2012 |
| THE Matsell Consultancy Ltd | Professional & scientific | 2023 |
| THE Party Starters Ltd | Arts & recreation | 2008 |
| THE Sancroft Barns Ltd | Hospitality | 2019 |
| THE Waterhouse Experience Ltd | Hospitality | 2026 |
| THE Weald Trading Company Ltd | Professional & scientific | 2012 |
| THE White Horse Inn Ltd | Hospitality | 2014 |
| Theo COX Limited | Professional & scientific | 2012 |
| Thornham Street Residents Association Limited | Households | 1987 |
| Thornthwaite Limited | Real estate | 1995 |
| Thoughtful Products Ltd | Wholesale & retail | 2025 |
| Timebubble Toys Limited | Manufacturing | 2015 |
| TIP Top Lawn Care Ltd | Administrative & support | 2024 |
| TJ Lift Services Ltd | Construction | 2019 |
| Tjjl Limited | Information & communication | 2011 |
| TK Retailer Ltd | Wholesale & retail | 2021 |
| TMO Enterprise Holdings Limited | Financial services | 2015 |
| TMO Traffic Highways Limited | Construction | 2014 |
| TNG Offshore Ltd | Manufacturing | 2020 |
| Townlands Properties Limited | Real estate | 2009 |
| TRB Distribution Ltd | Wholesale & retail | 2024 |
| TV and Marketing Agency Limited | Professional & scientific | 2017 |
| U-Neek-Memories Ltd | Other services | 2018 |
| Unblockabl Studios Ltd | Information & communication | 2023 |
| Union Quack Ltd | Professional & scientific | 2025 |
| Uphill Properties Limited | Real estate | 2019 |
| V&Mts Ltd | Wholesale & retail | 2021 |
| Verhaag Consulting Ltd | Information & communication | 2008 |
| Vero Brands Limited | Other services | 2024 |
| Vero Fabrics Limited | Other services | 2016 |
| Vital Distribution Ltd | Wholesale & retail | 2025 |
| Vital Global Ltd | Wholesale & retail | 2025 |
| VP Psychology Ltd | Health & social care | 2014 |
| W Cubed Tech Ltd | Information & communication | 2019 |
| W.R. Farms Limited | Agriculture & fishing | 2023 |
| Wakelyns VEG Community Interest Company | Agriculture & fishing | 2025 |
| Walstone Ltd | Construction | 2025 |
| Wash Farm Barn Limited | Arts & recreation | 2020 |
| Wash Ltd | Extraterritorial | 2023 |
| Washuk Ltd | Manufacturing | 2023 |
| Waterberry Community Projects Ltd | Education | 2018 |
| Watson & Poole Limited | Professional & scientific | 2012 |
| Waveney Foodbank | Other services | 2012 |
| Waveney Tree Specialists Ltd | Administrative & support | 2019 |
| Wecan Suffolk CIC | Health & social care | 2024 |
| Wellbeing That Works Limited | Health & social care | 2025 |
| Whatling Building Limited | Construction | 2021 |
| White Lion Management Limited | Real estate | 1988 |
| Winlee Investments Ltd | Real estate | 2024 |
| Wood Fuel and Heating Association Limited | Other services | 2025 |
| Workwear (East Anglia) Limited | Manufacturing | 2004 |
| Wren Media Limited | Administrative & support | 1998 |
| Wright Accounting Ltd | Professional & scientific | 2023 |
| Wrightfield Laps Ltd | Administrative & support | 2007 |
| Wrightform Limited | Manufacturing | 2002 |
| Write NOW Limited | Information & communication | 2018 |
| Xcybr Ltd | Information & communication | 2019 |
| Yaxley and Mellis Pre-School | Education | 2008 |
| Year OUT Group | Other services | 2001 |
| Year OUT Limited | Administrative & support | 1999 |
| Yooly Ltd | Health & social care | 2025 |
| Young & Wright Brickwork Construction | | 1997 |
| Your Naturopathic Dispensary Ltd | Health & social care | 2021 |
| Z. Munter (Farms) Limited | Agriculture & fishing | 1961 |
| Zakiss Limited | Extraterritorial | 1999 |
| Zetec Property Limited | Professional & scientific | 2004 |