| Sutton and Sons County Ltd | Hospitality | 2018 |
| Suzanna Rosenthal Limited | Arts & recreation | 2001 |
| Swaffham & Fakenham Florist Limited | Wholesale & retail | 2004 |
| Swaffham Airport Services Limited | Transport & logistics | 2010 |
| Swaffham Carpet Factory Ltd | Construction | 2006 |
| Swaffham Taxis Limited | Transport & logistics | 2018 |
| Swaffham's Fork & FUN Limited | Hospitality | 2026 |
| Swaffsub Limited | Hospitality | 2013 |
| Swains International Limited | Professional & scientific | 1953 |
| Swann Edwards Architecture Limited | Professional & scientific | 2012 |
| Swift TIP Ltd | Administrative & support | 2021 |
| Sylvia MAY Properties Limited | Real estate | 2016 |
| Symec Engineering Ltd | Professional & scientific | 2026 |
| Synaesthete Ltd | Professional & scientific | 2019 |
| Synergy Tech Limited | Information & communication | 2003 |
| System Three Group Limited | Information & communication | 2016 |
| Syzland Ltd | Financial services | 2023 |
| Szita Ltd | Administrative & support | 2025 |
| Süper Glow Car Valeting Ltd | Administrative & support | 2025 |
| T & E Transport Logistic Ltd | Transport & logistics | 2016 |
| T & T Properties (OX) Ltd | Real estate | 2021 |
| T & T Relocations Ltd | Hospitality | 2022 |
| T B Lettings Ltd | Real estate | 2021 |
| T J C Landrovers Ltd | Wholesale & retail | 2013 |
| T Oakley Holdings Ltd | Professional & scientific | 2024 |
| T Richardson Engineering Ltd | Manufacturing | 2017 |
| T&T Property Partners Ltd | Construction | 2022 |
| T-Craft Ltd | Construction | 2025 |
| T-Shirts Archives Limited | Manufacturing | 2024 |
| T.A.P. (KL) Ltd | Construction | 2020 |
| T.E.S.T Construction Ltd | Construction | 2019 |
| T.I.A. Distributions Ltd | Other services | 2015 |
| T.J. Cockroft Ltd | Wholesale & retail | 2000 |
| T.Keens & Sons Ltd. | Construction | 2011 |
| T.M. Browne Developments Limited | Real estate | 2014 |
| T8 Electrical (Norfolk) Ltd | Construction | 2019 |
| Tace Norfolk Limited | Construction | 2017 |
| Tackle Bitz Limited | Wholesale & retail | 2020 |
| Tadorna Holdings Limited | Agriculture & fishing | 1975 |
| Tadteck Private Ltd | Information & communication | 2021 |
| Tailored Contracts Ltd | Construction | 2025 |
| Tailored Paving & Groundwork's Ltd | Construction | 2024 |
| Talberdean Limited | Administrative & support | 2024 |
| Talbot Manor Gardens (Fincham) Management Company Limited | Households | 2025 |
| Talbots Bioscience Limited | Professional & scientific | 2024 |
| Tamar Shipping Consultants Limited | Professional & scientific | 2011 |
| TAN Express Ltd | Other services | 2011 |
| TAN Seekers Limited | Other services | 2009 |
| Tangent Civils & Groundworks Limited | Construction | 2016 |
| Tangent E.A. Holdings Ltd | Professional & scientific | 2016 |
| Tangent Farms Limited | Agriculture & fishing | 2025 |
| Tangent Properties Limited | Households | 2019 |
| Tangerine Creative Limited | Administrative & support | 2012 |
| Tansley Industrial Limited | Professional & scientific | 2021 |
| Tapping House | Other services | 1996 |
| Tara's Health & Fitness Ltd | Arts & recreation | 2013 |
| Tara's Rentals Ltd | Real estate | 2019 |
| Tatran Slovan Ltd | Transport & logistics | 2024 |
| Taverners Mews (Long Sutton) Management Company Limited | Households | 2005 |
| Tax Strategy Ltd | Professional & scientific | 2025 |
| Taylor Made Fitness Solutions Ltd | Professional & scientific | 2025 |
| Taylormade Tattooz Ltd | Other services | 2025 |
| TB Car Sales Ltd | Wholesale & retail | 2020 |
| TB Poke Collection Ltd | Wholesale & retail | 2026 |
| TBR Engineering Services Ltd | Professional & scientific | 2024 |
| Tea and the Gang Franchise Ltd | Real estate | 2022 |
| Tea and the Gang Limited | Manufacturing | 2017 |
| Teal Close (Snettisham) Limited | Construction | 2020 |
| Teal Close (Snettisham) Management Company Limited | Households | 2022 |
| Team Cladding Ltd | Construction | 2024 |
| Teamstrides Ltd | Manufacturing | 2013 |
| Tech-Wood Designs Limited | Manufacturing | 2003 |
| Technichol Engineering Ltd | Manufacturing | 2025 |
| Technowell Europe Limited | Wholesale & retail | 2015 |
| Techs Limited | Professional & scientific | 2000 |
| TEK Fitness Limited | Manufacturing | 2000 |
| Temperature Electronics Holdings Limited | Financial services | 2022 |
| Tempest Restoration Ltd | Administrative & support | 1998 |
| Templeman Associates EOT Limited | Administrative & support | 2022 |
| Templeman Associates Ltd | Professional & scientific | 2000 |
| Templeman Design Limited | Construction | 2016 |
| TEN Automotive Equipment Ltd | Manufacturing | 1994 |
| Terrabrick Global Ltd | Manufacturing | 2026 |
| Terrington Bakery Ltd | Wholesale & retail | 2005 |
| Terry Carter Limited | Extraterritorial | 2016 |
| Textniks Ltd | Arts & recreation | 2015 |
| Tezgel Properties Ltd | Real estate | 2022 |
| TEZGEL2025 Property Ltd | Real estate | 2025 |
| TF Engineering Limited | Professional & scientific | 2024 |
| TFR Building Services Ltd | Construction | 2025 |
| Thain Wildbur Limited | Professional & scientific | 2014 |
| THE Able Stables C.I.C. | Hospitality | 2020 |
| THE April Partridge Limited | Hospitality | 2019 |
| THE Bakers Tea Room (Norfolk) Ltd | Hospitality | 2019 |
| THE Barking Bubble Ltd | Agriculture & fishing | 2026 |
| THE Bathroom Place Ltd | Construction | 2021 |
| THE Bawsey Sandboy Ltd | Hospitality | 2023 |
| THE Beat Market Ltd | Wholesale & retail | 2025 |
| THE BED Base Company Limited | Manufacturing | 1995 |
| THE Beeches (Sporle) Ltd | Real estate | 2019 |