| Stanway Garage Ltd | Wholesale & retail | 2022 |
| Stanway Green Lodge (2021) Ltd | Health & social care | 2021 |
| Stanway Green Lodge LLP | | 2012 |
| Stanway Jarea Ltd | Health & social care | 2014 |
| Stanway MOT Ltd | Wholesale & retail | 2024 |
| Stanway Motors Limited | Wholesale & retail | 2023 |
| Stanway Pegasus FC Limited | Extraterritorial | 2025 |
| Stanway Plumbing Heating & GAS Services Ltd | Construction | 2020 |
| Stanway Property Limited | Real estate | 2022 |
| Stanway Safety Services Limited | Administrative & support | 2009 |
| Stanway Storage Limited | Other services | 2019 |
| Stanway Travel Services Limited | Administrative & support | 2016 |
| Stap Plumbing Ltd | Construction | 2022 |
| Star Craft Design Ltd | Wholesale & retail | 2021 |
| Star Design Solutions Ltd | Construction | 2014 |
| Star Environmental Limited | Water & waste | 2006 |
| Star Racing Club Limited | Arts & recreation | 2024 |
| Star Tyre Services Limited | Wholesale & retail | 2003 |
| Starelroi Ltd | Public administration | 2025 |
| Stargate Alliance Limited | Information & communication | 2025 |
| Staring at Sound Ltd | Professional & scientific | 2021 |
| Stark Consulting Solutions Ltd | Administrative & support | 2013 |
| Stark Food Ltd | Hospitality | 2021 |
| Starlight Optical Ltd | Health & social care | 2015 |
| Starline (Sales Ideas) Limited | Administrative & support | 2017 |
| Starry Asian Market (UK) Ltd | Wholesale & retail | 2015 |
| Starry Mart Fulham Ltd | Wholesale & retail | 2023 |
| Starry Mart London Dock Ltd | Wholesale & retail | 2024 |
| Starry Mart Wandsworth Ltd | Wholesale & retail | 2024 |
| Starrz Logistics Ltd | Transport & logistics | 2025 |
| Starrz Ltd | Information & communication | 2022 |
| Start Properties Limited | Construction | 2019 |
| Start Soft Ltd | Information & communication | 2017 |
| Start UP Digital Marketing Limited | Professional & scientific | 2025 |
| Startrescue.Co.Uk Limited | Financial services | 2016 |
| Stas Home Ltd | Real estate | 2023 |
| Stately Home Developments Ltd | Construction | 2021 |
| Station Court (Great Shelford) Limited | Real estate | 1989 |
| Statsdata Mining Limited | Information & communication | 2018 |
| Status Graphite Ltd | Extraterritorial | 2011 |
| Stav Limited | Transport & logistics | 2024 |
| Stayinapub Ltd | Information & communication | 2013 |
| STC Contracts Limited | Construction | 2012 |
| Steadfast Strategy Limited | Professional & scientific | 2022 |
| Steamer Cleaner Ltd | Administrative & support | 2020 |
| Steamship Maritime Co Ltd | Transport & logistics | 1989 |
| Stedman Builders Limited | Construction | 2015 |
| Steed and Steed Associates Ltd | Professional & scientific | 2019 |
| Steelpath Rail Solutions Ltd | Professional & scientific | 2024 |
| Steeple Barns Limited | Real estate | 2021 |
| Steggys Ltd | Wholesale & retail | 2022 |
| Stel UK Enterprises Limited | Other services | 2014 |
| Stella Wellbeing Ltd | Health & social care | 2026 |
| Stellar Contracts Ltd | Construction | 2023 |
| Stellar Healthcare Limited | Health & social care | 2014 |
| Stellar Track Ltd | Information & communication | 2025 |
| Stellin Properties Limited T/A Luke Stays Limited | Real estate | 2023 |
| Step Into Reality Limited | Information & communication | 2024 |
| Step Into Your Greatness Limited | Extraterritorial | 2023 |
| Step UP Properties Ltd | Real estate | 2024 |
| Step-In-Hen Records Ltd | Arts & recreation | 2015 |
| Stepe Law Ltd | Professional & scientific | 2024 |
| Stephen Baker Limited | Real estate | 1945 |
| Stephen Bennett Limited | Administrative & support | 2013 |
| Stephen F Mann Limited | Construction | 2003 |
| Stephen Firmin Limited | Financial services | 2011 |
| Stephen Minshull Ltd | Construction | 2024 |
| Stephen Thomas Ltd | Financial services | 2012 |
| Stepping Stones Housing Ltd | Real estate | 2026 |
| Sterling Pet Ltd | Manufacturing | 2021 |
| Sternenland Limited | Transport & logistics | 2018 |
| Stevaa Limited | Health & social care | 2018 |
| Steve and Sons Property Ltd | Construction | 2025 |
| Steve Read Illustration Ltd | Administrative & support | 2009 |
| Steve Walpole Limited | Hospitality | 2013 |
| Steve Wright (Engineering) Limited | Manufacturing | 2013 |
| Steveewels.Com Ltd | Professional & scientific | 2025 |
| Steven Burton & Co Limited | Professional & scientific | 2014 |
| Steven J. Webb Limited | Financial services | 2006 |
| Steven James Building Supplies Limited | Construction | 2017 |
| Steven James Land Limited | Real estate | 2025 |
| STG Asset Services Ltd | Information & communication | 2017 |
| Stiff Property Management Limited | Households | 2026 |
| Stifled Aardvark Limited | Professional & scientific | 2014 |
| Stiga Consulting Ltd | Professional & scientific | 2022 |
| Still Jacqui Dixon Ltd | Professional & scientific | 2025 |
| Stillhaus Tattoo Club Limited | Other services | 2025 |
| Stillness & Flow Ltd | Other services | 2025 |
| Stine Construction Limited | Construction | 2015 |
| Stitch Services Limited | Real estate | 2026 |
| Stitched by Caitlin Ltd | Manufacturing | 2025 |
| Stitches and Steel Conversions Limited | Wholesale & retail | 2019 |
| Stitches and Steel Limited | Wholesale & retail | 2015 |
| Stivic Care Services Ltd | Other services | 2020 |
| Stix and Stones Limited | Extraterritorial | 2005 |
| STK2008 Ltd | Transport & logistics | 2024 |
| Stmb (UK) Limited | Professional & scientific | 2023 |
| Stmr Ltd | Other services | 2023 |
| Stock Holdings Limited | Manufacturing | 1983 |
| Stock Metals Limited | Wholesale & retail | 2024 |