| Studio Kriskros Ltd | Professional & scientific | 2022 |
| Studio Retlas Ltd | Arts & recreation | 2025 |
| Sturmey-Archer Limited | Manufacturing | 2007 |
| Substance Communications Limited | Professional & scientific | 2013 |
| Sudzinski Transport Ltd. | Transport & logistics | 2015 |
| Suffolk Fascias Ltd | Construction | 2022 |
| Sugabyte Limited | Information & communication | 2013 |
| Sugarsweetshop Limited | Hospitality | 2016 |
| Summer Limited | Administrative & support | 2003 |
| Sumo Media Group Ltd | Information & communication | 2019 |
| Sunbeam Babies (2021) Ltd | Arts & recreation | 2021 |
| Sunbeambabies DAN Ltd | Arts & recreation | 2021 |
| Sundaes Retail Limited | Wholesale & retail | 1983 |
| Sunflower Lodge Limited | Administrative & support | 2014 |
| Sunflower Management Company Limited | Real estate | 2012 |
| Sunrise Cottage Lettings Ltd | Real estate | 2023 |
| Sunset Ventures Ltd | Financial services | 2026 |
| Superb Estates Ltd | Real estate | 2024 |
| Superior Resin Driveways Ltd | Construction | 2025 |
| Supply Agriculture Ltd | Wholesale & retail | 2025 |
| Support & Supervised Family Contact Centre Ltd | Health & social care | 2018 |
| SUPR3M3 Ceramic Ltd | Wholesale & retail | 2026 |
| Surface Integrity Ltd | Construction | 2026 |
| Sushi Boba Ltd | Hospitality | 2022 |
| Sutterton Self Storage Ltd | Transport & logistics | 2019 |
| Sutton Bridge Pizza Ltd | Hospitality | 2026 |
| Sutton Bridge Power Fund | Administrative & support | 1999 |
| Sutton Bridge Store Ltd | Wholesale & retail | 2013 |
| Sutton Bridge Supermarket Ltd | Wholesale & retail | 2025 |
| Sutton Pizza Perfection Ltd | Hospitality | 2025 |
| Sutton Property Solutions Limited | Real estate | 2005 |
| Sutton ST James Pre-School (Lincs) Limited | Education | 2024 |
| Suttons Plumbing, Heating & GAS Engineers Ltd | Construction | 2020 |
| SVR Limited | Administrative & support | 2002 |
| SW Roofing Contractors Ltd | Construction | 2025 |
| Swanmaiden Energy Services Ltd | Energy | 2025 |
| SWH Property Services Limited | Construction | 2017 |
| Swift Lift Sales Limited | Professional & scientific | 1994 |
| Swift Mouldings Limited | Manufacturing | 2026 |
| Swift Roofline Ltd | Construction | 2024 |
| Swiftroofing Ltd | Construction | 2022 |
| Swinstead Road Garage Limited | Wholesale & retail | 1981 |
| Switched Sussex Limited | Construction | 2021 |
| SY & Co Properties and Investments Ltd | Real estate | 2021 |
| Sycamore Close (Whaplode) Maintenance Company Limited | Construction | 2026 |
| Syldar Ltd | Transport & logistics | 2018 |
| Synergy Consultancy Ltd | Professional & scientific | 2023 |
| Systemize IT Limited | Information & communication | 2008 |
| Szifo Trans Ltd | Wholesale & retail | 2017 |
| T & G Trans Ltd | Transport & logistics | 2015 |
| T & P Driving Services Ltd | Transport & logistics | 2017 |
| T a Services (Lincs) Limited | Transport & logistics | 2010 |
| T and C Roofing Ltd | Construction | 2026 |
| T and C Trans Ltd | Transport & logistics | 2015 |
| T and T Garden Services Limited | Administrative & support | 2019 |
| T C L Developments (East Anglia) Limited | Construction | 2005 |
| T G Development Limited | Construction | 2007 |
| T G Family Holdings Limited | Financial services | 2024 |
| T G Properties (Holbeach) Limited | Real estate | 2014 |
| T H Concrete Flooring Ltd | Manufacturing | 2025 |
| T I O H Ltd | Manufacturing | 2016 |
| T J S Online Limited | Information & communication | 1999 |
| T J Tree and Landscaping Ltd | Administrative & support | 2025 |
| T R Marketfresh Limited | Agriculture & fishing | 2010 |
| T Skipper Carpentry Ltd | Manufacturing | 2023 |
| T W Tyres Ltd | Manufacturing | 2009 |
| T Whittle Contractors Limited | Construction | 2022 |
| T&A Maintenance Limited | Administrative & support | 2021 |
| T&B Holding (East) Ltd | Real estate | 2024 |
| T&M Agricultural Contractors Limited | Agriculture & fishing | 2005 |
| T. B. Bespoke Joinery Ltd | Construction | 2023 |
| T. Law & Sons Limited | Real estate | 1949 |
| T. W. Commercials Limited | Wholesale & retail | 2017 |
| T.A. Smith & Co. (Farm Produce) Limited | Agriculture & fishing | 1955 |
| T.O.M Musson Agri Limited | Agriculture & fishing | 2023 |
| T.W.R. (Haulage) Limited | Transport & logistics | 1997 |
| TA Auto Garage Ltd | Wholesale & retail | 2018 |
| Tabogon Services Ltd | Transport & logistics | 2024 |
| Tacm Trans Ltd | Transport & logistics | 2014 |
| Taded Ltd | Transport & logistics | 2014 |
| TAE Floorfreight Ltd | Transport & logistics | 2026 |
| TAG Spedition Ltd | Transport & logistics | 2020 |
| Tailor Made Care Cambridgeshire Limited | Health & social care | 2025 |
| Talens Health Support Services Ltd | Health & social care | 2021 |
| Tall Girl Fitness Ltd | Arts & recreation | 2024 |
| Talos Designs Limited | Manufacturing | 2014 |
| Talus ELC Limited | Professional & scientific | 2022 |
| Tano Drums Limited | Information & communication | 2016 |
| Tany Nature UK Ltd | Wholesale & retail | 2021 |
| Tanya Fidler Limited | Administrative & support | 2012 |
| Tapa Transport UK Ltd | Transport & logistics | 2024 |
| Tappenden Management Limited | Professional & scientific | 2000 |
| Tarantula Trans Ltd | Transport & logistics | 2022 |
| Tarinhills International Ltd | Administrative & support | 2015 |
| Tasty Treatos HQ Limited | Wholesale & retail | 2025 |
| Tasty Treatos Limited | Wholesale & retail | 2022 |
| Taumira Ltd | Information & communication | 2019 |
| Tauras Shop Limited | Wholesale & retail | 2024 |
| Taurus Bespoke Joinery Ltd | Construction | 2009 |
| Tavolo Bianco Limited | Manufacturing | 2026 |