| Stenning Limited | Administrative & support | 2002 |
| Steph Dyson Limited | Information & communication | 2022 |
| Stephanie Frances Bridal Ltd | Wholesale & retail | 2016 |
| Stephen Grundy Limited | Financial services | 2010 |
| Stephen J Redmond HR Limited | Professional & scientific | 2013 |
| Stephen Noble Lane FOX Limited | Real estate | 2009 |
| Stereoscopic Image Systems Limited | Professional & scientific | 1999 |
| Sterest Limited | Information & communication | 2016 |
| Steripierce Limited | Administrative & support | 2021 |
| Sterling Bosch Ltd | Professional & scientific | 2025 |
| Sterling Heritage Limited | Real estate | 2012 |
| Sterling House Property UK Limited | Real estate | 2008 |
| Sterling Housing Alderney Place Limited | Professional & scientific | 2013 |
| Sterling Housing Fossey Close Ltd | Professional & scientific | 2014 |
| Sterling Risk Group Ltd | Administrative & support | 2026 |
| Stets-Consulting Limited | Professional & scientific | 2019 |
| Steve Collins & Sons Surfacing Limited | Construction | 2017 |
| Steve Collins Plant Hire Limited | Financial services | 2017 |
| Steve Cronk Limited | Wholesale & retail | 2013 |
| Steve J Wadsworth Ltd | Professional & scientific | 2004 |
| Steve Milsom Properties Ltd | Real estate | 2020 |
| Steven Kids Rising Ltd | Real estate | 2024 |
| Steward Holdings Ltd. | Financial services | 2017 |
| Stewart Engineering Sunbeam Limited | Wholesale & retail | 2026 |
| Stickky Ltd | Manufacturing | 2021 |
| Stickleback Solutions Ltd | Professional & scientific | 2021 |
| Stickybrains Limited | Professional & scientific | 2022 |
| Stilling Limited | Real estate | 2009 |
| Stilwell Consulting Limited | Professional & scientific | 2017 |
| Stirling Gardens Flat Management Company Limited | Administrative & support | 1996 |
| Stirling Logic Ltd | Information & communication | 2025 |
| Stirling Ross Limited | Financial services | 2012 |
| Stitching Thread Ltd | Wholesale & retail | 2025 |
| STJ Holdings Limited | Financial services | 2018 |
| STM Marine Limited | Manufacturing | 2008 |
| STN Business Solutions Ltd | Administrative & support | 2023 |
| Stnr Ventures Ltd | Financial services | 2026 |
| Stockhound Ltd | Wholesale & retail | 2018 |
| Stockport Finance Ltd | Other services | 2016 |
| Stokes Solutions Limited | Construction | 2021 |
| Stompin' on the Quomps Community Interest Company | Arts & recreation | 2009 |
| Stone Park Corner (Management) Limited | Households | 2022 |
| Stone Park Property Management Limited | Households | 2025 |
| Stoneaxis Ltd | Mining & quarrying | 2026 |
| Stoneborough Limited | Real estate | 2020 |
| Stonebridge Property (Leisure) Ltd | Hospitality | 2013 |
| Stonecombe Properties Ltd | Construction | 2021 |
| Stonegate (Forge Cottage) Limited | Construction | 2020 |
| Stonegate Construction Limited | Construction | 2018 |
| Stonegate Homes (10 Hampstead RD) Limited | Real estate | 2022 |
| Stonegate Homes (Beaufort) Limited | Construction | 2019 |
| Stonegate Homes Group Limited | Professional & scientific | 2020 |
| Stonegate Homes Limited | Construction | 2010 |
| Stonegate Retained Ltd | Real estate | 2020 |
| Stonegrove Properties Limited | Real estate | 2022 |
| Stonehaven ( Preston RD ) Ltd | Construction | 2021 |
| Stonehaven Wealth Management Ltd | Financial services | 2024 |
| Stoneleigh Management Company (Oldham) Limited | Households | 2005 |
| Stonereach Ltd | Information & communication | 2022 |
| Stonework Marketing Limited | Manufacturing | 2000 |
| Stoneydown Management Company Limited | Administrative & support | 2016 |
| Storage Management Limited | Transport & logistics | 2003 |
| Store & Secure Limited | Extraterritorial | 2025 |
| Store and Sell Limited | Extraterritorial | 2025 |
| Storela Ltd | Wholesale & retail | 2023 |
| Storerack Limited | Wholesale & retail | 2023 |
| Storeshare Limited | Manufacturing | 1996 |
| Storesta Limited | Wholesale & retail | 2021 |
| Storewatch.Co.Uk Limited | Administrative & support | 2002 |
| Storey Productions Limited | Information & communication | 2019 |
| Storey Property & Developments Limited | Construction | 2020 |
| Storie Events Limited | Administrative & support | 2025 |
| Storm Ahead Limited | Construction | 2024 |
| Storm Contracting Limited | Construction | 2011 |
| Storm Designs Limited | Construction | 2015 |
| Storm Hair and Beauty Dorset Limited | Other services | 2024 |
| Storm Management Limited | Administrative & support | 1994 |
| Storm the Castle Ltd | Information & communication | 2015 |
| Stormautoworx Ltd | Wholesale & retail | 2024 |
| Storme Mktg Limited | Wholesale & retail | 2025 |
| Stormfield AI Ltd | Information & communication | 2026 |
| Stormforce Consulting Ltd | Information & communication | 2025 |
| Stormiya Ltd | Wholesale & retail | 2026 |
| Stosi Limited | Wholesale & retail | 2025 |
| Stoudemire Properties Ltd | Real estate | 2022 |
| Stourfield Mansion Management Co. Limited | Households | 1993 |
| Stourton Court Freehold Limited | Households | 2001 |
| STP Developers Limited | Construction | 2020 |
| STP Marine Ltd | Wholesale & retail | 2019 |
| Strada Geothermal (UK) Ltd | Construction | 2009 |
| Strain Supplements Ltd | Manufacturing | 2025 |
| Strata 316 Limited | Wholesale & retail | 2022 |
| Strata Structural Consulting Ltd | Professional & scientific | 2025 |
| Stratapoole Limited | Real estate | 2023 |
| Strategic Asset Solutions Ltd | Wholesale & retail | 2024 |
| Strategic Green Energy Ltd | Energy | 2023 |
| Strategic Green Land Ltd | Real estate | 2020 |
| Strategic Land Limited | Construction | 2016 |
| Strategic Moves Limited | Information & communication | 2015 |
| Strategic Paraplanning Limited | Financial services | 2019 |