| St.Edmunds,Limited | Extraterritorial | 1922 |
| Stamps Direct Limited | Manufacturing | 1976 |
| Stangroom Bros.Limited | Agriculture & fishing | 1961 |
| Stanhoe Farms Limited | Agriculture & fishing | 1955 |
| Star Paving Services Limited | Construction | 2002 |
| Starlings of Sheringham Limited | Wholesale & retail | 1990 |
| Starwell Marketing Limited | | 1988 |
| Station Fish Bites Limited | Hospitality | 2023 |
| Steele Media Ltd | Professional & scientific | 2007 |
| Stopbase Limited | Construction | 1988 |
| Stratfords Limited | Wholesale & retail | 1920 |
| Strathcona Properties (Sheringham) Limited | Real estate | 2007 |
| Strictly FLY Fishing Limited | Extraterritorial | 2008 |
| Strictly Theatre Co Limited | Real estate | 2017 |
| Stuart Wright Transport Limited | Wholesale & retail | 2006 |
| Stylemaker Contract Interiors Limited | | 1987 |
| Suanne Home Care Services Ltd | Health & social care | 2023 |
| Sujiroto Ltd | Hospitality | 2022 |
| Sunline Curtains and Blinds Limited | Manufacturing | 2000 |
| Sunrise Care Homes Limited | Health & social care | 2007 |
| Supreme Windows Limited | Construction | 1999 |
| Surf 55 Limited | Wholesale & retail | 2000 |
| Sutherland House Developments Ltd. | Construction | 1999 |
| Swaffham Museum Ltd. | Arts & recreation | 2002 |
| Swansons Limited | Professional & scientific | 1999 |
| Sweaty Mama (Branding) Ltd | Other services | 2019 |
| Sweaty Mama International Limited | Other services | 2017 |
| Sweaty Mama Topco Limited | Financial services | 2017 |
| System Three Business Solutions Limited | Information & communication | 2003 |
| T I J Wharton Limited | Construction | 2007 |
| T M Burrows & SON Ltd | Wholesale & retail | 2007 |
| TAS Valley Mushrooms Limited | Agriculture & fishing | 2004 |
| Tax Prep UK Limited | Professional & scientific | 2006 |
| Taylan Barber Ltd | Administrative & support | 2017 |
| Taylor Diving and Marine Limited | Professional & scientific | 1999 |
| Team Lotus International Limited | Manufacturing | 1975 |
| Tekpro Limited | Manufacturing | 1999 |
| Tellett Properties Ltd | Real estate | 2024 |
| Ten-Eighty (Norwich) Limited | Wholesale & retail | 2003 |
| Tennis for Life Ltd | Extraterritorial | 2006 |
| Terracotta House Ltd | Hospitality | 2025 |
| Tetlow & Sons Limited | Agriculture & fishing | 1951 |
| Thaali Ltd | Hospitality | 2019 |
| Thakrar Limited | Wholesale & retail | 1987 |
| Thanehall Limited | Manufacturing | 1985 |
| THE Bilney Partnership Limited | Information & communication | 2006 |
| THE Blakeney Bookkeeping Company Limited | Professional & scientific | 2003 |
| THE Bodycentre Limited | Wholesale & retail | 2002 |
| THE Budd Company (UK) Ltd | Extraterritorial | 1970 |
| THE Chemist Shop Limited | Administrative & support | 2004 |
| THE Dutch Oven Limited | Wholesale & retail | 2003 |
| THE East Coast Motor Company, Limited | Wholesale & retail | 1933 |
| THE Flying Classrooms Limited | Education | 2000 |
| THE Foster Clinic Limited | Health & social care | 2003 |
| THE Friends of the Bure Valley Railway Ltd | Arts & recreation | 2021 |
| THE Gallery Holt Limited | Administrative & support | 2003 |
| THE Gate Marketing Communications Limited | Professional & scientific | 2002 |
| THE Golden Phoenix (Lowestoft) Limited | Wholesale & retail | 2006 |
| THE GUN Hill Clothing Company Limited | Wholesale & retail | 2002 |
| THE Iconic Vintage Co Ltd | Wholesale & retail | 2025 |
| THE Internet Connection Limited | Administrative & support | 2008 |
| THE Kings Head, Holt | | 1999 |
| THE Little Sheep Company Limited | Agriculture & fishing | 2025 |
| THE Lobster Public House Limited | Hospitality | 2002 |
| THE Maltings Q Club Limited | Arts & recreation | 1987 |
| THE Media Point (UK) Limited | Professional & scientific | 1994 |
| THE Mudbug Limited | Hospitality | 2014 |
| THE Norfolk Conservatory Company Limited | Wholesale & retail | 1988 |
| THE Organic PIG Company Ltd. | Agriculture & fishing | 1998 |
| THE Osokozi Gallery Limited | Wholesale & retail | 2003 |
| THE Performance Academy LLP | | 2016 |
| THE Railway Inn (Docking) Limited | Hospitality | 2003 |
| THE Stuart House Hotel Limited | Hospitality | 2003 |
| THE Sustainable Farm Group Ltd | Financial services | 2023 |
| THE Swan (Gooderstone) Limited | Hospitality | 1989 |
| THE Swan Hotel (Harleston) Limited | Hospitality | 2001 |
| THE Wellington Hotel (Cromer) Ltd | Hospitality | 2001 |
| THE White Hart, Swaffham | | 2000 |
| THE White Horse (Holme) Limited | Hospitality | 2006 |
| THE Winch Property Management Limited | Households | 2019 |
| THE Wymondham Bridewell Preservation Trust | Other services | 1994 |
| Thermalock Limited | Professional & scientific | 2002 |
| Thetford & District Funeral Services Ltd | Other services | 2002 |
| Thetford Golf Club Limited | Arts & recreation | 2017 |
| Thetford International Properties Limited | Real estate | 1998 |
| Thsob Electrical Limited | Construction | 2004 |
| Thurton Foundries Limited | Manufacturing | 1963 |
| Thurton Holdings Ltd | Financial services | 2023 |
| Tice Hair Stylist Limited | Other services | 1962 |
| Tickover Limited | Professional & scientific | 2003 |
| Tidswell Childs LLP | | 2006 |
| TIM Collin Limited | Manufacturing | 2003 |
| Timeless Acquisitions Ltd | Agriculture & fishing | 2014 |
| Timothy Barry Services Limited | Administrative & support | 2022 |
| Timothy Hignett and Partners Limited | Professional & scientific | 1999 |
| TIN House | Education | 2006 |
| Tinklers (Motor Cycles) Limited | Wholesale & retail | 1986 |
| TLC (UN) Ltd | Administrative & support | 2018 |
| Toilets + Limited | Administrative & support | 1990 |
| Tony Larner Limited | Professional & scientific | 1996 |