| ST. Francis Court Management Co. Ltd | Administrative & support | 2013 |
| Stacys Residential Limited | Households | 2025 |
| Staff 365 Recruitment Services Ltd | Administrative & support | 2018 |
| Staff for Education Ltd | Administrative & support | 2021 |
| Staffright (Southend) Ltd | Administrative & support | 2016 |
| Staffright Group Ltd | Administrative & support | 2016 |
| Stagheath Limited | Hospitality | 2004 |
| Stammers Yard Management Company Limited | Hospitality | 2007 |
| Staples Builders & Sons Limited | Construction | 2015 |
| Star ADS Media Ltd | Professional & scientific | 2024 |
| Starfish Limited | Manufacturing | 2003 |
| Stay in Wells Limited | Hospitality | 2018 |
| Stealth Exterior Solutions Ltd | Construction | 2021 |
| Steelmasters Limited | Wholesale & retail | 1985 |
| Sterkai Group Ltd | Wholesale & retail | 2025 |
| Stirling Strategy Limited | Professional & scientific | 2014 |
| Stonebridge Farms Limited | Real estate | 1997 |
| Stoves MAN Ltd | Construction | 2015 |
| Stower Grange Hotel Limited | Hospitality | 2023 |
| Straight Forward Recruitment Limited | Administrative & support | 2015 |
| Stratton Long Limited | Professional & scientific | 2022 |
| Street Potatoes Limited | Manufacturing | 2021 |
| Stressless Property and Wills LLP | | 2018 |
| Stressless Wills Ltd | Professional & scientific | 2020 |
| Sturdivant Design Consultants Limited | Professional & scientific | 2002 |
| Subaqua Construction Services Ltd | Construction | 2011 |
| Sully Solutions Ltd | Professional & scientific | 2024 |
| Sunfire Spirits Ltd | Manufacturing | 2018 |
| Sunnyside Furniture & Property Services Ltd | Manufacturing | 2013 |
| Supermmans Steals Ltd | Wholesale & retail | 2025 |
| Sustream Ltd | Information & communication | 2026 |
| Sutton Recruitment Limited | Administrative & support | 2016 |
| SV Digital Limited | Professional & scientific | 2022 |
| Swallowbarns Group Limited | Professional & scientific | 1999 |
| Swanton Morley Contracting Ltd | Agriculture & fishing | 2014 |
| Swanton Morley Farms Limited | Agriculture & fishing | 1953 |
| Swanton Morley Garage Services Limited | Wholesale & retail | 2015 |
| Sward Services Limited | Transport & logistics | 2018 |
| Swarm Group Ltd | Professional & scientific | 2017 |
| Swarm Hive Network LLP | | 2024 |
| Swarm Tech Ltd | Administrative & support | 2025 |
| Swecom Limited | Wholesale & retail | 2026 |
| Sweeper Spares Limited | Other services | 2011 |
| Sweetzy Ltd | Wholesale & retail | 2019 |
| System Communications Limited | Wholesale & retail | 2003 |
| T and C Farms Ltd | Agriculture & fishing | 2018 |
| T Bridges Services Ltd | Construction | 2023 |
| T J B Consultancy Solutions Ltd | Information & communication | 2026 |
| T T S Norfolk Ltd | Transport & logistics | 2020 |
| T.Aldridge Contracting Limited | Construction | 2015 |
| T.E.S. Assured Homes Limited | Real estate | 1990 |
| T.Green Roofing & Leadwork Limited | Construction | 2012 |
| T.R. Smith (Agricultural Spares) Limited | Wholesale & retail | 2012 |
| T.R.S. (Environmental) Limited | Wholesale & retail | 2002 |
| T.R.Smith (Agricultural Machinery) Limited | Wholesale & retail | 1987 |
| Tabbanor & Knight Kerb Laying & Paving Ltd | Construction | 2025 |
| Tacola Limited | Information & communication | 2005 |
| Tank Replacement Services Limited | Manufacturing | 1995 |
| Tanyaa Properties Limited | Real estate | 2006 |
| Tasp Ltd | Information & communication | 2019 |
| Taverham Hand Car Wash Ltd | Wholesale & retail | 2019 |
| Taverham Nursery Centre Limited | Extraterritorial | 2004 |
| Technical Labelling Support Limited | Other services | 2025 |
| Techtide Limited | Information & communication | 2016 |
| Tedwoods Furniture Limited | Manufacturing | 2018 |
| Tempest & Shulver Ltd | Real estate | 2024 |
| Temtech East Ltd | Energy | 2026 |
| Tenmill Limited | Financial services | 2012 |
| Tenterfield (Holdings) Limited | Financial services | 2012 |
| Termite Central Ltd | Professional & scientific | 2015 |
| Terra Botanica Landscapes Ltd | Administrative & support | 2024 |
| Tetra Firestopping Limited | Construction | 2019 |
| TH Fencing & Landscaping Ltd | Administrative & support | 2026 |
| THE Adventuring Coach Ltd | Administrative & support | 2024 |
| THE Bargain Community Limited | Wholesale & retail | 2014 |
| THE Barlow Charity | Construction | 2006 |
| THE Bay Retreat (EA) Ltd | Real estate | 2026 |
| THE Beach House Lowestoft Ltd | Hospitality | 2012 |
| THE Beauty Barn Norfolk Ltd | Other services | 2025 |
| THE Beni Sports Superstars Ltd | Professional & scientific | 2026 |
| THE Benidorm Racing Club Ltd | Arts & recreation | 2026 |
| THE Bilzaar Ltd | Wholesale & retail | 2023 |
| THE Bintree Oak Limited | Hospitality | 2021 |
| THE Blazing Blues and Twos Ltd | Arts & recreation | 2024 |
| THE Breeding Centre Limited | Agriculture & fishing | 2022 |
| THE Brothers Chips and Fish Ltd | Hospitality | 2022 |
| THE Butchers Shop Limited | Wholesale & retail | 2021 |
| THE Capybara Cafe (Norfolk) Limited | Agriculture & fishing | 2025 |
| THE Coach House North Elmham Limited | Hospitality | 2012 |
| THE Coachmakers Kitchen Ltd | Hospitality | 2018 |
| THE Crown Reepham 2022 Ltd | Hospitality | 2022 |
| THE Cycle Exchange Dereham CIC | Wholesale & retail | 2025 |
| THE David Hewson Practice Ltd | Financial services | 2011 |
| THE Dereham Window Company Ltd | Manufacturing | 2023 |
| THE Diocese of Norwich Education and Academies Trust | Education | 2013 |
| THE Diocese of Norwich ST Benet's Multi-Academy Trust | Education | 2018 |
| THE East Anglia Film Company Limited | Information & communication | 2018 |
| THE Engaging People Company Limited | Professional & scientific | 2017 |
| THE Flying Dutchman (Engineering) Limited | Professional & scientific | 2019 |
| THE Foul Players Limited | Arts & recreation | 2016 |