| Stanzell & Co. Ltd | Information & communication | 2013 |
| Stanzino Group Limited | Wholesale & retail | 2019 |
| Stapleford BRP Ltd | Real estate | 2018 |
| Stapleford Commercial Group Limited | Real estate | 1992 |
| Stapleford Frog Island (Rainham) Limited | Real estate | 2008 |
| Stapleford Frog Island Limited | Real estate | 2008 |
| Stapleford Group Limited | Real estate | 2018 |
| Stapleford Managements Limited | Professional & scientific | 2008 |
| Stapleford Property Investments Limited | Real estate | 2008 |
| Stapleford Racing Limited | Arts & recreation | 2008 |
| Stapleford T150 Ltd | Real estate | 2018 |
| Stapleford Thetford Limited | Real estate | 2008 |
| Stapleford Ventures Limited | Construction | 2008 |
| Stapleford Waverley Limited | Real estate | 2022 |
| Star and Light Services Limited | Construction | 2011 |
| Star Beers Ltd | Wholesale & retail | 1998 |
| Star Esther Limited | Health & social care | 2015 |
| Star Kids Club Limited | Health & social care | 2009 |
| Star Pharma Consults Ltd | Wholesale & retail | 2021 |
| Starck Communications Limited | Professional & scientific | 2017 |
| Starkidsstedmunds Ltd | Education | 2025 |
| Starlight Electrical Maintenance Limited | Construction | 2019 |
| Starlight Group Holdings Ltd | Financial services | 2025 |
| Starlite Consulting Ltd | Other services | 2015 |
| Stasco Ltd | Transport & logistics | 2020 |
| State of Grace Films Limited | Information & communication | 2006 |
| Station Forty Four Ltd | Construction | 2022 |
| Station Spice Limited | Hospitality | 2025 |
| STC Electrical Solutions Limited | Administrative & support | 2012 |
| Stead & SON Interiors Ltd | Construction | 2023 |
| Stead & Wilkins Limited | Manufacturing | 1973 |
| Stead (Holdings) Limited | Financial services | 2013 |
| Stead Electrical Services Limited | Construction | 2013 |
| Steel Appeal Limited | Manufacturing | 1998 |
| Steelstem Construction Ltd | Construction | 2022 |
| Stefanovski Ltd | Wholesale & retail | 2026 |
| Stela Support Services Ltd | Construction | 2013 |
| Stellar Care Support Limited | Health & social care | 2020 |
| Stellart Trade Limited | Financial services | 2016 |
| Stellaskitchendelight Ltd | Hospitality | 2025 |
| Stemic Solutions Limited | Administrative & support | 2025 |
| Stenic Electrical Contracting Limited | Construction | 2006 |
| Stent Joinery Limited | Manufacturing | 2016 |
| Steoai Ltd | Information & communication | 2025 |
| Step by Step Day Nursery Ltd | Education | 2009 |
| Step Stone Light Ltd | Real estate | 2025 |
| Step UP Coaching Ltd | Professional & scientific | 2024 |
| Step UP Sports Consultancy Limited | Professional & scientific | 2015 |
| Stephen James (Residential Estate Agents) Limited | Real estate | 2005 |
| Stephen Ruiz Ltd | Professional & scientific | 2018 |
| Stephen T.P. Kember Limited | Wholesale & retail | 2003 |
| Stepien&Stepien Holding Limited | Financial services | 2018 |
| Stepien&Stepien Ltd | Health & social care | 2015 |
| Stepien&Stepien Property Limited | Real estate | 2020 |
| Stepz Marketing Ltd | Professional & scientific | 2025 |
| Sterling Consulting & Resourcing Ltd | Education | 2025 |
| Sterling Gardens (Two) Management Company Limited | Professional & scientific | 1990 |
| Sterling Site Supplies Limited | Wholesale & retail | 2014 |
| Sterling Trust Co. Ltd | Professional & scientific | 2024 |
| Sterlingdeal Traders Ltd | Wholesale & retail | 2026 |
| Steve Johnson Consulting Ltd | Information & communication | 2025 |
| Steve Lewis Building Services Limited | Construction | 2014 |
| Steve's Carpets Ltd. | Wholesale & retail | 2012 |
| Steven Wilkinson Limited | Construction | 2006 |
| Stevens Rowsell (Precision) Limited | Manufacturing | 2012 |
| Stevens Rowsell Group Limited | Financial services | 2020 |
| Stewart Legal Services Limited | Professional & scientific | 2016 |
| Steze Limited | Construction | 2015 |
| STH LDN Limited | Arts & recreation | 2018 |
| Sticky Note Co. Ltd | Wholesale & retail | 2026 |
| Stigmental Limited | Health & social care | 2022 |
| Stillbright Security Ltd | Administrative & support | 2019 |
| Stiller Vision Limited | Information & communication | 2025 |
| STJ Carpentry Ltd | Manufacturing | 2026 |
| STJ Property Limited | Real estate | 2020 |
| Stoica Logistiks Limited | Transport & logistics | 2018 |
| Stoke MOT & Service Ltd | Wholesale & retail | 2018 |
| Stoke Road CCE Developments (HOO) Ltd | Construction | 2025 |
| Stone Collection Limited | Extraterritorial | 2012 |
| Stone Convenience Ltd | Wholesale & retail | 2026 |
| Stone Crest Homes Limited | Real estate | 2012 |
| Stone Environmental Limited | Other services | 2008 |
| Stone Winners Limited | Professional & scientific | 2008 |
| Stonegrove Group Limited | Construction | 2020 |
| Stonehouse Property Services Limited | Professional & scientific | 2024 |
| Stonemore Consulting Limited | Professional & scientific | 2018 |
| Stones Property Lettings Ltd | Real estate | 2026 |
| STORE2DOOR Group Ltd | Administrative & support | 2017 |
| STORE2DOOR Storage Solutions Ltd | Transport & logistics | 2023 |
| Storepak Limited | Manufacturing | 2011 |
| Stork Consultants Ltd | Professional & scientific | 2017 |
| Stormlight Creations Ltd | Information & communication | 2024 |
| Storystack Partners Ltd | Professional & scientific | 2023 |
| Straight Arrow Limited | Professional & scientific | 2019 |
| Straight Arrow Properties Limited | Real estate | 2025 |
| Strategik Visionary Ltd | Professional & scientific | 2025 |
| Strava Group Management Ltd | Professional & scientific | 2024 |
| Strava Sixes (Croydon) Ltd | Hospitality | 2025 |
| Stravis Technology Limited | Wholesale & retail | 2017 |
| Streamline Production Services Ltd | Administrative & support | 2025 |