| SS UK Holdings Ltd | Financial services | 2026 |
| SSB Property Limited | Real estate | 2003 |
| SSN Medics Ltd | Health & social care | 2019 |
| Sssp Limited | Real estate | 2025 |
| ST Clements Cars Ltd | Wholesale & retail | 2012 |
| ST Edmundsbury Financial Management LLP | | 2016 |
| ST Elvan Limited | Professional & scientific | 2015 |
| ST James BED Centre (Norfolk) Ltd | Wholesale & retail | 2017 |
| ST James Conservation Ltd | Construction | 2012 |
| ST John's Court Maintenance Company Limited | Real estate | 1991 |
| ST Peter Drive Management Company Limited | Households | 2021 |
| ST. Germans Property Ltd | Real estate | 2017 |
| ST. Giles Leisure Developments Limited | Construction | 2020 |
| Stafford Project Management (Norfolk) Limited | Professional & scientific | 2024 |
| Stainless Reality Ltd | Information & communication | 2022 |
| Stalinesque Ltd | Professional & scientific | 2011 |
| Stancer Brothers Ltd | Agriculture & fishing | 2011 |
| Stanhoe Enterprises Ltd | Real estate | 2026 |
| Stanley Engineering Designs Ltd | Professional & scientific | 2013 |
| Stanton Rentals Limited | Real estate | 2022 |
| Star Wing Brewery Ltd | Manufacturing | 2015 |
| Start Right HR Ltd | Administrative & support | 2025 |
| Staryn Holdings Limited | Financial services | 2026 |
| Station Road Garage (Heacham) Limited | Wholesale & retail | 2012 |
| Station Storage (Lincs) Ltd | Real estate | 2020 |
| STC4C Holdings Limited | Professional & scientific | 2015 |
| STC4C Limited | Wholesale & retail | 2010 |
| Steadfast Estimating & Construction Consulting Ltd | Construction | 2023 |
| Steam Laundry (Norfolk) Limited | Other services | 2005 |
| Stebbings Car Centre Limited | Wholesale & retail | 2003 |
| Steelscapes EOT Limited | Administrative & support | 2021 |
| Steffi Daniel Ltd | Extraterritorial | 2023 |
| Stella Developments Norfolk Limited | Real estate | 2025 |
| Step 6 Ltd | Real estate | 2012 |
| Stepaside Agri Limited | Administrative & support | 2005 |
| Stephen Devlin Limited | Information & communication | 2021 |
| Stephen Roberts (Auctioneer) Ltd | Administrative & support | 2003 |
| Stephenson Phillips Limited | Real estate | 2019 |
| Stephenson Smart (East Anglia) Limited | Professional & scientific | 2012 |
| Steve EKE Consultancy Limited | Administrative & support | 2020 |
| Steve Hart Restoration and Race Preparation Limited | Manufacturing | 2004 |
| Steve's Taxi Service Limited | Transport & logistics | 2015 |
| Stew Campbell Ltd | Education | 2025 |
| Still Here Productions Ltd | Information & communication | 2022 |
| Stody Limited | Other services | 2006 |
| Stoke Ferry Retail Ltd | Real estate | 2025 |
| Stoke Ferry Timber Limited | Agriculture & fishing | 2005 |
| Stoke Sporting Club Ltd | Arts & recreation | 2023 |
| Stokes Nelson Limited | Health & social care | 2010 |
| Stone Park Management Limited | Real estate | 2018 |
| Stonecutters Limited | Manufacturing | 2002 |
| Stonekeep Property Limited | Real estate | 2026 |
| Stonewall Group Limited | Real estate | 2025 |
| Storm Music and Images Limited | Information & communication | 2010 |
| Stow Estate Property Ltd | Real estate | 2016 |
| Stow Hatcheries Limited | Agriculture & fishing | 2005 |
| Stradsett Events Ltd | Administrative & support | 2013 |
| Stradsett Trustees (NO 1) Limited | Extraterritorial | 2012 |
| Stradsett Trustees (NO 2) Limited | Extraterritorial | 2012 |
| Strand Electrical Services Limited | Construction | 2025 |
| Strata Architects Limited | Other services | 2007 |
| Strategicplace Health Ltd | Professional & scientific | 2026 |
| Strategicplace Ltd | Real estate | 2025 |
| Strathblair Limited | Real estate | 2010 |
| Strathelm Capital Management Limited | Professional & scientific | 2026 |
| Stratonyx Energy Ltd | Mining & quarrying | 2026 |
| Streamroad Limited | Real estate | 2004 |
| Stride Recruitment (Bristol) Limited | Administrative & support | 2022 |
| STS Carpets & Flooring Limited | Construction | 2014 |
| Studio 19 KL Ltd | Arts & recreation | 2025 |
| Studio Baum CIC | Hospitality | 2025 |
| Studio Maclagan Limited | Professional & scientific | 2024 |
| Studiogold Limited | Other services | 2009 |
| Studiou Game Development Ltd | Information & communication | 2024 |
| Styleman Court Residents Management Company Limited | Households | 2025 |
| Suevi Developments Ltd | Construction | 2020 |
| Suffolk Car Company Ltd | Wholesale & retail | 2019 |
| Suiter Construction Limited | Construction | 2015 |
| Suiter Properties Ltd | Real estate | 2020 |
| Sulieman Limited | Health & social care | 2024 |
| Sulivan Holdings Limited | Administrative & support | 2020 |
| Summit Architectural Ltd | Professional & scientific | 2020 |
| Summit Proposals Ltd | Professional & scientific | 2025 |
| Sun Coast Holdings Limited | Hospitality | 2018 |
| Sun Lounge the Perfect TAN Ltd | Other services | 2024 |
| Sun Spiral Limited | Information & communication | 2020 |
| Sunday Soul Ltd | Wholesale & retail | 2024 |
| Sunflour Ltd | Hospitality | 2023 |
| Sunnymead Holiday Park \ 1 Ltd | Hospitality | 2005 |
| Sunshar Ltd | Real estate | 2019 |
| Sunshar Ortho Ltd | Health & social care | 2025 |
| Superior Management Limited | Professional & scientific | 2018 |
| Supreme Carpets Limited | Wholesale & retail | 1982 |
| Supreme Surfacing Limited | Construction | 2010 |
| Sure Line Safety Limited | Wholesale & retail | 2010 |
| Sursarang Arts Ltd | Arts & recreation | 2022 |
| Susit IT Systems Limited | Information & communication | 2025 |
| Sussex Smart Solutions Ltd | Information & communication | 2016 |
| Sustain Consultancy Limited | Professional & scientific | 2006 |
| Sutha Aesthetics Limited | Health & social care | 2011 |