| Saffron Blinds Limited | Manufacturing | 2021 |
| Sagewood Spaces Limited | Real estate | 2025 |
| Sakura J&C Ltd | Hospitality | 2021 |
| Samson Global Ltd | Wholesale & retail | 2025 |
| Sandbox Storage Ltd | Administrative & support | 2013 |
| Sandgalls Road 1961 Limited | Extraterritorial | 2013 |
| SCD Bars Limited | Hospitality | 2024 |
| SDP Properties 2020 Ltd | Real estate | 2020 |
| Seams to BE Fixed Ltd | Other services | 2024 |
| Sfes Ltd | Manufacturing | 2015 |
| Sharp Groundworks Limited | Extraterritorial | 2024 |
| Shea Equine Services Ltd | Agriculture & fishing | 2025 |
| Showmans Group Ltd | Arts & recreation | 2020 |
| Silver Palm Group Ltd | Financial services | 2023 |
| Silver Palm Properties Ltd | Real estate | 2023 |
| SIX11 Properties Ltd | Administrative & support | 2025 |
| SJM Business Consultant Ltd | Professional & scientific | 2020 |
| Smith Cars (Brandon) Limited | Wholesale & retail | 2024 |
| Smyth Property Investments Limited | Households | 2025 |
| Spa Upvc Limited | Construction | 2023 |
| Sparks Electrical Solutions Limited | Construction | 2017 |
| Spiral Hardware Limited | Wholesale & retail | 2005 |
| SS Electrical Services (East Anglia) Ltd | Administrative & support | 2017 |
| Stark Cards Ltd | Wholesale & retail | 2023 |
| Start Right Holdings Limited | Administrative & support | 2026 |
| Start Right Reinforcement & Formwork Limited | Manufacturing | 2015 |
| Stephen Macdonald Consulting Ltd | Education | 2019 |
| Stewart Chambers Ltd | Manufacturing | 2018 |
| Storied House Ltd | Information & communication | 2024 |
| Strength in People Ltd | Administrative & support | 2019 |
| Strive ABA Consultancy Ltd | Health & social care | 2018 |
| Style Windows Holdings Ltd | Construction | 2024 |
| Suffolk Building and Property Maintenance Ltd | Construction | 2025 |
| Suffolk Machine Knives Limited | Manufacturing | 2010 |
| Sweendytodd Ltd | Other services | 2024 |
| Swimming Pool Supplies & Services Limited | Extraterritorial | 1997 |
| Swimming Pool Supplies Limited | Construction | 1979 |
| Syut Ltd | Wholesale & retail | 2016 |
| T.Cepkauskas Ltd | Transport & logistics | 2025 |
| Tanaj Ltd | Hospitality | 2021 |
| TAO Delight Limited | Hospitality | 2025 |
| Taylor Built Coaching Ltd | Arts & recreation | 2025 |
| Tendcall Limited | Hospitality | 2004 |
| Terra-Vac Lakenheath Limited | Manufacturing | 2014 |
| THE Aesthetics Barn Limited | Other services | 2022 |
| THE Barbers (Brandon) Ltd | Other services | 2018 |
| THE Brief HQ Ltd | Information & communication | 2026 |
| THE Carpet Store (Brandon) Ltd | Wholesale & retail | 2014 |
| THE Detailing Collective Limited | Wholesale & retail | 2023 |
| THE International School Consultancy Group Ltd | Education | 2013 |
| THE Moving Company Limited | Transport & logistics | 2007 |
| THE Newmarket Fencing Company Ltd | Construction | 2003 |
| Threshold ISR Ltd | Public administration | 2024 |
| Tilly's Tea Rooms Limited | Hospitality | 2020 |
| TIM Elliott Legal REP Ltd | Professional & scientific | 2022 |
| TIM Stevens Racing Motors Limited | Wholesale & retail | 2015 |
| Timberland Homes Limited | Professional & scientific | 2003 |
| TMX Engineering Limited | Manufacturing | 2015 |
| TNI Consulting Limited | Administrative & support | 2015 |
| TNI Property Services Ltd | Real estate | 2020 |
| Toolspace Ltd | Wholesale & retail | 2021 |
| Total Access Glazing Ltd | Construction | 2021 |
| Total Photography (Brandon) Ltd | Wholesale & retail | 2015 |
| Town Street Limited | Wholesale & retail | 2018 |
| Training 999 Ltd | Education | 2021 |
| Triple Two CLO Limited | Manufacturing | 2023 |
| Trisor United Developments Ltd | Information & communication | 2014 |
| Twilight Cleaning Services Ltd | Administrative & support | 2003 |
| Twillthorpe Limited | Administrative & support | 2018 |
| Two Mills Asset Management Limited | Real estate | 2013 |
| TWR Accountants Ltd | Professional & scientific | 2014 |
| TYD Music Ltd | Administrative & support | 2019 |
| UK Polythene Holdings Limited | Manufacturing | 2018 |
| UK Sundecks Limited | Construction | 2008 |
| Undley Holdings Ltd | Information & communication | 2025 |
| Valbri Motel Limited | Hospitality | 2018 |
| Valentino’S Brandon Ltd | Hospitality | 2025 |
| Vallance Capital Ltd | Administrative & support | 2026 |
| Visualise Aesthetics Limited | Other services | 2022 |
| Webber Brickworks Ltd | Construction | 2010 |
| Weeting Caravan Storage Ltd | Transport & logistics | 2018 |
| West Suffolk Arts Centre C.I.C. | Education | 2011 |
| Westbrookdevelopments (WBD) Ltd | Construction | 2025 |
| Weticulum Technologies Ltd. | Information & communication | 2014 |
| Willow Grove Farm Limited | Agriculture & fishing | 2020 |
| Willow Grove Glamping & Events Ltd | Hospitality | 2025 |
| Willowcare (Suffolk) Ltd | Health & social care | 2018 |
| Windymillers Limited | Wholesale & retail | 2005 |
| Wired Electrical Solutions Ltd | Construction | 2025 |
| With Love From Suffolk Ltd | Wholesale & retail | 2019 |
| Wolf Car Service Ltd | Wholesale & retail | 2021 |
| Wolf Cars & Vans Ltd | Wholesale & retail | 2016 |
| Woodland Vale Residents Management Company Limited | Households | 2013 |
| Woodstock Cottage Contractors Limited | Agriculture & fishing | 2019 |
| Woody's Auto Works Ltd | Wholesale & retail | 2025 |
| Workbench Productions Ltd | Information & communication | 2026 |
| World Skeet Masters Limited | Arts & recreation | 2020 |
| Wright Choice Enterprises Limited | Wholesale & retail | 2025 |
| Wright's Roofs Ltd | Construction | 2023 |
| WRP Building Services Limited | Construction | 2007 |