| RJ (UK) Limited | Other services | 2000 |
| RJH Farming Limited | Agriculture & fishing | 2002 |
| Road to Success Limited | Health & social care | 1997 |
| Robert Thackray Limited | Agriculture & fishing | 2003 |
| Robertson Homes (East Anglia) Limited | Construction | 2000 |
| Robin Crawley Limited | Health & social care | 2003 |
| Robin Legge Limited | Wholesale & retail | 1961 |
| Robinson & ROE Limited | Construction | 2003 |
| Robson Construction Limited | Construction | 2007 |
| Rock YOU Productions Limited | Arts & recreation | 2024 |
| Rocket Design (East Anglia) Limited | Information & communication | 2004 |
| Roger Holme Foods Limited | Wholesale & retail | 2005 |
| Roger P. Wright (Investments) Limited | Real estate | 1978 |
| Rollmark Limited | Manufacturing | 1997 |
| Ropecall Limited | Construction | 2001 |
| Rosebell Care Ltd | Health & social care | 2017 |
| Rosedale Funeral Home Ltd. | Other services | 2004 |
| Rossi's Leisure Limited | Arts & recreation | 1978 |
| Rouf Homes Ltd | Construction | 2007 |
| Rowanglen and Griffin Ltd | Real estate | 2025 |
| Royle Decorating Services Limited | Construction | 2002 |
| RTC Properties Limited | Hospitality | 2004 |
| RTW (UK) Limited | Information & communication | 2007 |
| Rusagri Limited | Agriculture & fishing | 2006 |
| S B Agriculture Limited | Wholesale & retail | 2002 |
| S Cotton Testing Limited | Construction | 2007 |
| S J Burton Electrical Contractor Limited | Construction | 2004 |
| S S Plant and Fishing Ltd | Administrative & support | 2005 |
| S V Harvey Developments Ltd | Construction | 2007 |
| S Wright Vehicle Valeting Limited | Wholesale & retail | 2003 |
| S Yates Limited | Agriculture & fishing | 2002 |
| S. Ward Electrical Limited | Construction | 2007 |
| S.T. & T.J. Perkins (1997) Limited | Extraterritorial | 1971 |
| S2 Partnership Limited | Professional & scientific | 1999 |
| Salsa Shark Limited | Professional & scientific | 2005 |
| SAM Barker Photography Ltd | Real estate | 2012 |
| Samstar Residents Company Limited | Households | 1987 |
| Samuel Spinks & SON Limited | Construction | 1947 |
| Sandy Gulls Caravan Park Limited | Hospitality | 1965 |
| Sansprite Limited | Administrative & support | 1992 |
| Sapey Limited | Wholesale & retail | 2025 |
| Saturn Seeds Limited | Wholesale & retail | 2002 |
| Savers Friend Limited | Extraterritorial | 1999 |
| Sbco Limited | Professional & scientific | 2007 |
| Schilling CTS Limited | Education | 2004 |
| Schyra Foods Anglia Limited | Wholesale & retail | 2007 |
| Scott Packaging Ltd. | Administrative & support | 1992 |
| Scuro Limited | Information & communication | 2006 |
| Seamaster Solutions Limited | Other services | 2023 |
| Searles (Camping Ground) Limited | Hospitality | 1954 |
| Seaspray Cottage Limited | Hospitality | 2023 |
| Sebi Limited | Professional & scientific | 2000 |
| Secol Limited | Manufacturing | 1959 |
| Seed Brothers (East Anglia) Limited | Wholesale & retail | 1983 |
| Select Project Management Ltd | Professional & scientific | 2002 |
| Sema Lease UK Limited | Administrative & support | 2004 |
| Sendasound Limited | Transport & logistics | 1976 |
| Setch Transport Limited | Transport & logistics | 1983 |
| Sexton Pitt Property Limited | Real estate | 2025 |
| Sgil GH Limited | Manufacturing | 1947 |
| Sgil HS Holdings Limited | Professional & scientific | 2004 |
| Sgil HS Limited | Manufacturing | 1938 |
| Shadow (Holdings) UK Limited | Real estate | 2003 |
| Shadwell Estate Company Limited | Arts & recreation | 1987 |
| Sharp Security Services Limited | | 1988 |
| Shelmear Limited | Financial services | 2002 |
| Sheringham Little Theatre Society | Arts & recreation | 2001 |
| Sheringham Masonic Association Limited(The) | Health & social care | 1952 |
| SHI 109 Ltd | Hospitality | 2024 |
| Shiki Japanese Food Limited | Hospitality | 2002 |
| Shiki Zero YON Limited | Hospitality | 2002 |
| Shoestop Limited | Wholesale & retail | 2004 |
| Sigma Services Aircraft Ltd | Manufacturing | 2003 |
| Silfield Limited | Agriculture & fishing | 1958 |
| Silver Orchard Properties Ltd | Real estate | 2012 |
| Silverline Marine Limited | Hospitality | 1989 |
| Simon Edwards Electrical Ltd | Construction | 2005 |
| Simonsen Physiotherapy and Consultancy Limited | Professional & scientific | 2003 |
| Simply Norfolk Ltd | Wholesale & retail | 2017 |
| SJ Oils Trading Ltd | Wholesale & retail | 2024 |
| SJW Safety Solutions Limited | Professional & scientific | 2006 |
| Ski-Dazzle Limited | Administrative & support | 2002 |
| Skies UN Limited | Extraterritorial | 2007 |
| Sleepwalking Ltd | Administrative & support | 2007 |
| Slihe Ltd | Real estate | 2025 |
| Smart Tech Car Care Ltd | Wholesale & retail | 2023 |
| SMI Housing Association Limited | Health & social care | 1993 |
| Smile Orthodontics LLP | | 2007 |
| Smugglers BNB Limited | Hospitality | 2023 |
| Snbs Limited | Professional & scientific | 2006 |
| Snowmountain Enterprises Limited | Real estate | 1964 |
| Snowmountain OCH Ltd | Hospitality | 2001 |
| Sofia Food Ltd | Hospitality | 2025 |
| Solus (London) Limited | Wholesale & retail | 1995 |
| Sorros Ltd | Manufacturing | 2006 |
| Specialist Labels Ltd | Manufacturing | 2003 |
| Spurgeon Pigs Limited | Agriculture & fishing | 2002 |
| ST John's Fish & Chips Limited | Hospitality | 2021 |
| ST Miles Alley Limited | Extraterritorial | 1995 |
| ST. George's House Investments Limited | Professional & scientific | 1988 |