| TOM Cartos Ltd | Arts & recreation | 2021 |
| Tony Gallagher - Supporting Learning Ltd | Education | 2017 |
| Top Stuff Limited | Manufacturing | 2016 |
| Torrens Consult and Relocate Services Ltd | Transport & logistics | 2016 |
| Tru-Care Limited | Health & social care | 2007 |
| Trustans Barn Ltd | Hospitality | 2013 |
| Trusted Renewables Ltd | Information & communication | 2008 |
| Turner-Mann Enterprises Ltd | Hospitality | 2016 |
| Twisted Oaks (Bike Park & Trails) CIC | Arts & recreation | 2018 |
| Twisted Oaks (Bike Park) CIC | Arts & recreation | 2024 |
| Two Magpies Bakery (Framlingham) Ltd | Hospitality | 2024 |
| Two Magpies Group Limited | Financial services | 2025 |
| U.F.O. Sports Ltd | Wholesale & retail | 2022 |
| UGF Catering Limited | Wholesale & retail | 2018 |
| UK Aerial Photography Limited | Information & communication | 2015 |
| Ussher Tours Limited | Administrative & support | 1991 |
| Vikings ALL Star CIC | Arts & recreation | 2022 |
| Viridian Oak Ltd | Hospitality | 2018 |
| Vizora Ltd | Information & communication | 2011 |
| W.G. Gosling & Sons (Ipswich) Limited | Real estate | 1968 |
| W2 Consults Ltd | Administrative & support | 2013 |
| W2 Trading Ltd | Wholesale & retail | 2019 |
| Warrior Fire Rescue Service Ltd | Public administration | 2018 |
| Waste Management Total Solutions Limited | Water & waste | 2009 |
| Wayne Hart Limited | Transport & logistics | 2015 |
| Wcha Investments Ltd | Financial services | 2024 |
| WE ARE WOW Ltd | Wholesale & retail | 2021 |
| Weller Projects Ltd | Construction | 2024 |
| WES RAD Limited | Professional & scientific | 2008 |
| Westbury Lending Limited | Financial services | 2022 |
| Westrup-James Limited | Financial services | 2023 |
| Westrup-Thorpe Ltd | Real estate | 2022 |
| WHI Properties Limited | Real estate | 2021 |
| White House Farm (Great Glemham) Limited | Agriculture & fishing | 2022 |
| Wickham Care Company Ltd | Health & social care | 2019 |
| Wild Sisters Ltd | Professional & scientific | 2025 |
| Will Felton Limited | Real estate | 2017 |
| Wolsey House Investments Limited | Extraterritorial | 2015 |
| Wooden Roots Limited | Wholesale & retail | 2018 |
| Woodside Winter Services Ltd | Real estate | 2026 |
| Worlingham Woodlands Limited | Agriculture & fishing | 2018 |
| Wormell Plant Hire Limited | Administrative & support | 2015 |
| Wrcq Holdings | Financial services | 2018 |
| Wright Outcomes Limited | Professional & scientific | 2005 |
| Wright Wood Fuels Ltd | Wholesale & retail | 2021 |
| Wristband.Live Ltd | Information & communication | 2025 |
| Yalkay Ltd | Transport & logistics | 2020 |
| Yellowbarn Limited | Professional & scientific | 2009 |
| YES Group London Community Interest Company | Education | 2011 |
| Youngs Hospitality Dunwich Limited | Hospitality | 2024 |
| Yoxford Antique Centre Limited | Wholesale & retail | 2023 |
| Yoxford Garage Limited | Wholesale & retail | 2013 |
| Z&Z Accounting and Bookkeeping Ltd | Professional & scientific | 2023 |
| Zephy Limited | Professional & scientific | 2023 |
| Zorbas Takeaway Ltd | Hospitality | 2019 |