| Stonegate Instruments Limited | Manufacturing | 1990 |
| Stonegate Legal Limited | Professional & scientific | 2014 |
| Stonegate Park Management Company Limited | Households | 2006 |
| Stonegate Property Solutions Ltd | Real estate | 2018 |
| Stonegate Trust Corporation Limited | Administrative & support | 2020 |
| Stonehawk Limited | Administrative & support | 2017 |
| Stonehouse Property Investment Services Limited | Real estate | 2003 |
| Stonelake Anaesthetic Services Ltd | Health & social care | 2016 |
| Stoneleigh Court (Leeds) RTM Company Limited | Households | 2009 |
| Stoneleigh Ltd | Professional & scientific | 2020 |
| Stoneleigh Properties (Shadwell) Ltd | Real estate | 2024 |
| Stonemasters (Yorkshire) Limited | Construction | 2003 |
| Stonemill Ceramics Ltd | Construction | 2021 |
| Stonemill Holdings Ltd | Real estate | 2024 |
| Stonepetals Ltd | Real estate | 2019 |
| Stoneridge Medical Ltd | Information & communication | 2020 |
| Stones & Co Financial Services Ltd | Financial services | 2024 |
| Stones Properties Ltd | Real estate | 2020 |
| Stoneweg Capital Advisers Ltd. | Financial services | 2018 |
| Stoneweg Capital Ventures UK Limited | Financial services | 2001 |
| Stoneweg CEE Development Holdings Limited | Financial services | 2004 |
| Stoneweg Development Holdings UK Limited | Financial services | 2005 |
| Stoneweg Development Management UK Limited | Real estate | 2003 |
| Stoneweg European Holdings Limited | Financial services | 2015 |
| Stoneweg European Management Services Limited | Real estate | 1995 |
| Stoneweg Holdings Europe Limited | Financial services | 2002 |
| Stoneweg Investment Holdings UK Limited | Financial services | 2001 |
| Stoneweg Investment Management Services Limited | Real estate | 1995 |
| Stoneweg Management EU Holdings Limited | Financial services | 1994 |
| Stoneweg Sert Holdings Limited | Financial services | 2018 |
| Stoneweg UK Director Limited | Extraterritorial | 2004 |
| Stonewell Property Ltd | Real estate | 2026 |
| Stonewood Construction Leeds Ltd | Construction | 2020 |
| Stoneycroft Consulting Ltd | Professional & scientific | 2012 |
| Stoneycroft Interim Limited | Professional & scientific | 2015 |
| Stoneyridge Limited | Administrative & support | 2014 |
| Stoneyrock Properties Ltd | Real estate | 2025 |
| Stop & Shop 90 Ltd | Wholesale & retail | 2025 |
| Stop Group Ltd | Professional & scientific | 2018 |
| Storage Bods Limited | Financial services | 2012 |
| Storage Grid 1 Ltd | Administrative & support | 2026 |
| Storage Grid 2 Ltd | Administrative & support | 2026 |
| Storage Grid Ltd | Administrative & support | 2026 |
| Store & Archive Limited | Arts & recreation | 2014 |
| Stored Value Solutions UK Limited | Administrative & support | 1999 |
| Storey & SON Ltd | Manufacturing | 2019 |
| Storey Electrical Ltd | Construction | 2024 |
| Storey Electrics Limited | Construction | 2025 |
| Storey Estates Ltd | Real estate | 2013 |
| Storey Huish Resourcing Limited | Administrative & support | 2003 |
| Stories of I DO Limited | Wholesale & retail | 2017 |
| Storm Brand Design Limited | Professional & scientific | 2010 |
| Storm Tuning Limited | Wholesale & retail | 2017 |
| Storm Valeting & Detailing Limited | Administrative & support | 2022 |
| Stormberg Solutions Ltd | Extraterritorial | 2020 |
| Stormfast Limited | Construction | 2011 |
| Stormy Sky Ltd | Wholesale & retail | 2024 |
| Story (UK) Digital Ltd | Information & communication | 2015 |
| Story+ Limited | Information & communication | 2021 |
| Stotts Decor Limited | Construction | 2008 |
| Stowe Family Law Finance Limited | Professional & scientific | 2016 |
| Stowe Family Law Holdings Limited | Professional & scientific | 2016 |
| Stowe Family Law LLP | | 2007 |
| Stowe Family Law Property Limited | Professional & scientific | 2017 |
| Stowe Family Law Services Limited | Professional & scientific | 2010 |
| Stowe Support Services LLP | | 2010 |
| Stox Apartments Limited | Real estate | 2019 |
| STOX4U Ltd | Wholesale & retail | 2022 |
| STQ89 Limited | Health & social care | 2023 |
| STR Projects Limited | Construction | 2018 |
| STR Property Holdings Ltd | Real estate | 2019 |
| Strachan Furniture Makers Limited | Manufacturing | 1993 |
| Strachan Holdings Limited | Professional & scientific | 2006 |
| Strachan Leeds Limited | Health & social care | 2010 |
| Strachan Wood Associates Ltd | Professional & scientific | 2015 |
| Strada Accountants Ltd | Professional & scientific | 2025 |
| Straight Forward Logistics Ltd | Other services | 2023 |
| Straightsmiles Ortho Limited | Health & social care | 2022 |
| Strakers Properties Ltd | Real estate | 2023 |
| Strange Fitness Ltd | Health & social care | 2024 |
| Strange Orbit Limited | Information & communication | 2023 |
| Strangers' by Pillar House Limited | Information & communication | 2024 |
| Strapaz Limited | | 1993 |
| Strasec Consulting Ltd | Wholesale & retail | 2013 |
| Strasse (UK) Limited | Wholesale & retail | 2004 |
| Strata Capital London LLP | | 2015 |
| Strategenio Limited | Information & communication | 2025 |
| Strategia Group Ltd. | Professional & scientific | 2026 |
| Strategic 38 Limited | Financial services | 2024 |
| Strategic Analytics Services Ltd | Information & communication | 2023 |
| Strategic Building Group Ltd | Construction | 2023 |
| Strategic Change Consulting Ltd | Information & communication | 2013 |
| Strategic Coatings Limited | Manufacturing | 2013 |
| Strategic Consultancy Ltd | Professional & scientific | 2021 |
| Strategic Development Solutions Land Limited | Real estate | 2013 |
| Strategic Fire Protection Limited | Construction | 2023 |
| Strategic Growth Ltd | Professional & scientific | 2021 |
| Strategic Sales Solutions Limited | Professional & scientific | 2025 |
| Strategiva Limited | Information & communication | 2025 |
| Strategivy Limited | Information & communication | 2025 |