| Sterling HHC Resources Ltd | Administrative & support | 2018 |
| Sterling Homes London Limited | Health & social care | 2024 |
| Sterling Meded Scientific Ltd | Professional & scientific | 2022 |
| Sterling Media Limited | Professional & scientific | 2002 |
| Sterling Microventures Ltd | Wholesale & retail | 2019 |
| Sterling Richmond Ltd | Information & communication | 2022 |
| Sterling Rose Freeholds Ltd | Real estate | 2019 |
| Sterling Rose Homes Limited | Real estate | 2016 |
| Sterling Silver Handmade Jewellery Ltd | Wholesale & retail | 2024 |
| Sterling Specialty Chemicals Holding UK Limited | Financial services | 2023 |
| Sterling Specialty Chemicals UK Limited | Manufacturing | 2023 |
| Sterling Wealth Associates Limited | Wholesale & retail | 2017 |
| Sterlingca LLP | | 2021 |
| Stern Homes LLP | | 2020 |
| Stern Homes Two Limited | Real estate | 2021 |
| Stern Property Group Limited | Real estate | 2025 |
| Stern Search Limited | Administrative & support | 2020 |
| Steve Chamberlain Social Care Limited | Health & social care | 2014 |
| Steve Savage Publishers Limited | Information & communication | 2001 |
| Steve Soden Construction Limited | Construction | 1995 |
| Steve's Bees Ltd | Wholesale & retail | 2023 |
| Stewart Consulting Limited | Professional & scientific | 2007 |
| Stewart Homes & Living Ltd | Real estate | 2025 |
| STG Accountants Ltd | Professional & scientific | 2024 |
| STG Business Advisory Ltd | Professional & scientific | 2026 |
| Stgca LLP | | 2019 |
| STH Property Ltd | Real estate | 2024 |
| STH Systems Limited | Information & communication | 2012 |
| Stheer Ltd | Information & communication | 2026 |
| Sthir Limited | Financial services | 2024 |
| Stiell UK Limited | Professional & scientific | 2015 |
| Stigma Construction Ltd | Construction | 2019 |
| Stimes Innovations Limited | Information & communication | 2024 |
| Stirling Park Properties Ltd | Real estate | 2022 |
| Stirling Road Ltd | Real estate | 2019 |
| STJ Consultancy Ltd | Information & communication | 2011 |
| STM Car Ltd | Transport & logistics | 2025 |
| STM Print Ltd | Manufacturing | 2024 |
| Stockdale Energy Limited | Professional & scientific | 2020 |
| Stockdale Legal Limited | Professional & scientific | 2018 |
| Stockhen Ltd | Real estate | 2021 |
| Stocklink Wholesale Ltd | Wholesale & retail | 2025 |
| Stoian Projects Ltd | Construction | 2023 |
| Stoke Gabriel Estates LLP | | 2023 |
| Stone & Wood Carpentry & Building Limited | Construction | 2024 |
| Stone CUT Solutions Limited | Information & communication | 2013 |
| Stone Flower Ltd | Extraterritorial | 2024 |
| Stone Gifts Limited | Wholesale & retail | 2021 |
| Stone Home Refurbishment Limited | Construction | 2009 |
| Stone Lake London Limited | Health & social care | 2016 |
| Stone Trade Supplies Ltd | Wholesale & retail | 2026 |
| Stone Wallwork UK Limited | Manufacturing | 2004 |
| Stone Worktop Surfaces Ltd | Construction | 2026 |
| Stone World (London) Limited | Wholesale & retail | 1987 |
| Stoneacre Assets Limited | Professional & scientific | 2023 |
| Stonebridge Advisory Group Limited | Professional & scientific | 2019 |
| Stonebridge Builders Ltd | Construction | 2016 |
| Stonebridge Capital Properties Ltd | Real estate | 2026 |
| Stonebridge Works Limited | Construction | 2025 |
| Stonecress Limited | Administrative & support | 2002 |
| Stonefort Ltd | Construction | 2003 |
| Stoneham House Management Company Limited | Households | 1998 |
| Stoneport Limited | Real estate | 1997 |
| Stones Architects Ltd | Professional & scientific | 2023 |
| Stones Design and Build Ltd | Construction | 2023 |
| Stones Land Limited | Wholesale & retail | 2025 |
| Stones Property Ltd | Real estate | 2020 |
| Stonewold Court Residents' Association Limited | Real estate | 1980 |
| Stonewyn Ltd | Professional & scientific | 2026 |
| Stoneyfield Biofuel Limited | Agriculture & fishing | 2012 |
| Stopshop Trading Limited | Wholesale & retail | 2016 |
| Storage West Bath Ltd | Other services | 2021 |
| Stories Unboxed Ltd | Information & communication | 2022 |
| Storm Media and Publishing Limited | Information & communication | 2012 |
| Storm Proof Roofing & Developments Limited | Construction | 2023 |
| Stormfield Productions Ltd | Information & communication | 2004 |
| Stormglaze UK Limited | Wholesale & retail | 1997 |
| Stormstack Ltd | Administrative & support | 2017 |
| STP Registrars Limited | Professional & scientific | 2011 |
| STP Residential Ltd | Real estate | 2025 |
| STR & Sons Ltd | Real estate | 2016 |
| STR Accounting Services Ltd. | Professional & scientific | 2014 |
| Str&Dra Ltd | Construction | 2024 |
| Stradone Property Partners Ltd | Real estate | 2026 |
| Straight Cars Ltd | Administrative & support | 2021 |
| Straight Holdings PVT Ltd | Professional & scientific | 2025 |
| Straight Line Limited | Transport & logistics | 2015 |
| Strand Newhall Limited | Professional & scientific | 2022 |
| Strata Development Consultants Limited | Administrative & support | 2014 |
| Strata Surveying & Retrofit Ltd | Construction | 2022 |
| Strategic Eservices Ltd | Information & communication | 2012 |
| Strategic Mgmt Services Ltd | Professional & scientific | 2024 |
| Strategic Security and Consultancy Services Limited | Administrative & support | 2018 |
| Strategic Stories Limited | Administrative & support | 2024 |
| Strategic UK Group Ltd | Professional & scientific | 2020 |
| Strategic Web Success (UK) Ltd | Information & communication | 2014 |
| Strategos Analytica Ltd | Information & communication | 2022 |
| Strategos Limited | Wholesale & retail | 2009 |
| Strategy Force Limited | Information & communication | 2025 |
| Stratfield Construction Services Limited | Construction | 2019 |