| Star Trio Limited | Hospitality | 2024 |
| Star UK Logistics Ltd | Transport & logistics | 2025 |
| Starchy and Starchy Ltd | Professional & scientific | 2024 |
| Stardog Limited | Construction | 2026 |
| Staret Limited | Health & social care | 2025 |
| Starlee Holdings Limited | Health & social care | 2023 |
| Starlight Consulting Services Ltd | Administrative & support | 2023 |
| Starlight Grace Limited | Health & social care | 2022 |
| Starline Services Ltd | Administrative & support | 2025 |
| Starlink Medical Services Ltd | Health & social care | 2019 |
| Starlink Textiles Ltd | Wholesale & retail | 1999 |
| Starlite Building Services Ltd | Construction | 2025 |
| Starlite Electrical Solutions Ltd | Construction | 2024 |
| Startec Limited | Manufacturing | 2005 |
| Startpoint TV Ltd | Information & communication | 2021 |
| Startrade Ltd | Wholesale & retail | 2010 |
| Starwell CS Ltd | Information & communication | 2025 |
| Starz Recruitment Limited | Administrative & support | 2025 |
| Stash Trade Limited | Arts & recreation | 2024 |
| Stat Healthcare Specialist Limited | Health & social care | 2013 |
| State Land Investment Limited | Real estate | 2022 |
| Station Clinic Ltd | Health & social care | 2025 |
| Station Court Limited | Administrative & support | 1987 |
| Station Nursery Ltd | Real estate | 2021 |
| Station Works (Datchet) Management Limited | Other services | 1985 |
| Stature Solutions Ltd | Information & communication | 2020 |
| Staybridge Development Ltd | Real estate | 2020 |
| Staybridge Group Ltd | Hospitality | 2021 |
| Staybridge Holdings Ltd | Professional & scientific | 2022 |
| Stayease Properties Limited | Hospitality | 2025 |
| Steadfast Removals Limited | Transport & logistics | 2016 |
| Steakout Southall Limited | Hospitality | 2015 |
| Steamline Connect 3 Limited | Wholesale & retail | 2026 |
| Steevan Glover Ltd | Professional & scientific | 2020 |
| Stefan Andrei Cerescu Ltd | Transport & logistics | 2019 |
| Stefan Transport Solution Ltd | Transport & logistics | 2014 |
| Stella Management Limited | Wholesale & retail | 2019 |
| Stellar Design and Construction Ltd | Construction | 2023 |
| Stellarpath Ltd | Professional & scientific | 2024 |
| Stellen Infotech Ltd | Information & communication | 2023 |
| Stemp Group Ltd | Wholesale & retail | 2025 |
| Stenning Roofing & Property Maintenance Ltd | Construction | 2020 |
| Stenning Services Limited | Construction | 2025 |
| Step to Save Ltd | Wholesale & retail | 2022 |
| Stepco Group International Ltd | Construction | 2026 |
| Stephens Properties Limited | Real estate | 2026 |
| Stepup Classes Ltd | Education | 2025 |
| Stepzone Limited | Other services | 2012 |
| Steril Ltd | Financial services | 2024 |
| Sterline Trader Ltd | Wholesale & retail | 2026 |
| Sterling Accountant Hub Ltd | Professional & scientific | 2026 |
| Sterling Building and Roofing Contractors Ltd | Construction | 2025 |
| Sterling Facility Management Limited | Administrative & support | 2020 |
| Sterling Gold Ltd | Wholesale & retail | 2016 |
| Sterling Governance & Advisory Limited | Professional & scientific | 2026 |
| Sterling Health & Lifestyle Ltd | Other services | 2024 |
| Sterling Tax Associates Limited | Professional & scientific | 2024 |
| Sterlux Group Ltd | Administrative & support | 2025 |
| Steve Bennett Property Investments Ltd | Households | 2018 |
| Steve Fell Services Limited | Other services | 2009 |
| Stevebennett Limited | Real estate | 2023 |
| Stewards Place Limited | Professional & scientific | 2024 |
| STF IT Management Consulting Services Ltd | Wholesale & retail | 2016 |
| Sticky Print and Design Limited | Manufacturing | 2025 |
| Stimpson Consultants Ltd | Information & communication | 2017 |
| Stint Gear Ltd | Wholesale & retail | 2026 |
| Stiro Limited | Health & social care | 2010 |
| STK Autos Limited | Wholesale & retail | 2024 |
| STM Housing Ltd | Real estate | 2025 |
| Stoakes Nolder Services Limited | Administrative & support | 2008 |
| Stoby’S Fish & Chips Ltd | Other services | 2025 |
| Stockr App Ltd | Information & communication | 2026 |
| Stoke App Ltd | Information & communication | 2025 |
| Stoke Gardens Management Limited | Extraterritorial | 1987 |
| Stoke House Residents Management Company Ltd | Households | 2023 |
| Stoke Park Avenue Limited | Households | 1972 |
| Stoke Poges Car Company Ltd | Wholesale & retail | 2026 |
| Stoke Poges Food & Wine Ltd | Wholesale & retail | 2018 |
| Stoke Poges Task Force Ltd | Other services | 2026 |
| Stoke Poges Technology Limited | Wholesale & retail | 2012 |
| Stoke Supermarket Ltd | Wholesale & retail | 2021 |
| Stokes Property Management Ltd | Real estate | 2018 |
| Stone and Oak Planning & Construction Limited | Construction | 2025 |
| Stone Expressions Limited | Construction | 2008 |
| Stone Tech 1 Ltd | Construction | 2014 |
| Stonebridge Solutions Ltd | Information & communication | 2010 |
| Stonecot Holdco Limited | Financial services | 2023 |
| Stonecot Propco Limited | Construction | 2023 |
| Stonecrop CC Limited | Administrative & support | 2026 |
| Stoneforge Construction Limited | Construction | 2025 |
| Stonehouse Education Ltd | Education | 2018 |
| Stonehouse Healthcare Limited | Health & social care | 2021 |
| Stoneridge Construction & Interiors Ltd | Construction | 2020 |
| Stoney Meade Fish and Chips Ltd | Hospitality | 2019 |
| STORE.A1 Ltd | Wholesale & retail | 2020 |
| Storox Ltd | Wholesale & retail | 2025 |
| Storycraft Publishing Ltd | Information & communication | 2026 |
| Straight Estate Solutions Ltd | Real estate | 2023 |
| Straight Flavours Ltd | Hospitality | 2025 |
| Strategic Commercial Finance Limited | Professional & scientific | 2019 |