| Stairs and Storage Ltd | Construction | 2025 |
| Stalewski Mechanical Ltd | Wholesale & retail | 2022 |
| Stan Joravine Consulting Limited | Education | 2024 |
| Staniforth Developments Ltd | Construction | 2018 |
| Staniforths (Rawmarsh) Limited | Manufacturing | 1963 |
| Stanley Black & Decker Finance Limited | Extraterritorial | 2016 |
| Stanley Black & Decker International Finance 2 Limited | Professional & scientific | 2019 |
| Stanley Black & Decker International Finance 3 Limited | Professional & scientific | 2019 |
| Stanley Black & Decker International Finance 4 Limited | Professional & scientific | 2019 |
| Stanley Black & Decker IP Holdings Limited | Administrative & support | 2021 |
| Stanley Black & Decker Pension Trustee Limited | Extraterritorial | 2001 |
| Stanley Black & Decker UK Group Ltd | Professional & scientific | 2018 |
| Stanley Black & Decker UK Holdings Limited | Professional & scientific | 2010 |
| Stanley Car Parts and Repair Ltd | Wholesale & retail | 2025 |
| Stanley Healthcare Solutions Limited | Extraterritorial | 1992 |
| Stanley Security Solutions - Europe Limited | Professional & scientific | 1966 |
| Stanley Turbine Services Limited | Manufacturing | 2014 |
| Stanley U.K. Holding Ltd. | Professional & scientific | 1997 |
| Stanley UK Acquisition Company Limited | Professional & scientific | 2004 |
| Stanley UK Limited | Extraterritorial | 2000 |
| Stanley UK Sales Limited | Extraterritorial | 1972 |
| Stanley UK Services Limited | Administrative & support | 1999 |
| Stanley Works Limited(The) | Manufacturing | 1920 |
| Stanton Logistics Limited | Transport & logistics | 2007 |
| Stapleton Building Ltd | Construction | 2022 |
| Star Barber S66 Limited | Other services | 2023 |
| Star Buying Limited | Wholesale & retail | 2023 |
| Star Commercials Manchester Limited | Wholesale & retail | 2021 |
| Star Commercials Rotherham Limited | Manufacturing | 2021 |
| Star Convenience Limited | Wholesale & retail | 2024 |
| Star Dance Events Ltd | Arts & recreation | 2024 |
| Star Motion Ltd | Wholesale & retail | 2022 |
| Star Properties Group Ltd | Real estate | 2025 |
| Stargraft Ltd | Construction | 2024 |
| Starling Electrical Limited | Construction | 2010 |
| Starovision Diagnostics Ltd | Health & social care | 2025 |
| Start Associates Private Ltd | Hospitality | 2023 |
| Start to Finish Incorporated Limited | Construction | 2007 |
| Starting Point Housing CIC | Real estate | 2025 |
| Stat Mechanical & Electrical Ltd | Construction | 2025 |
| Static Clothing UK Ltd | Manufacturing | 2012 |
| Statik Events Ltd | Administrative & support | 2025 |
| Station Food Ltd | Hospitality | 2023 |
| Station TAP Ltd | Hospitality | 2026 |
| Staverton (UK) Limited | Manufacturing | 2009 |
| Staverton UK (Esop) Limited | Professional & scientific | 2015 |
| Staysafe Electrical Ltd | Manufacturing | 2012 |
| STD Fashwear Ltd | Wholesale & retail | 2022 |
| Steal a Deal Ltd | Wholesale & retail | 2026 |
| Stealth Motors Ltd | Wholesale & retail | 2025 |
| Steel City Cars Ltd | Wholesale & retail | 2023 |
| Steel City Profiles Limited | Manufacturing | 2012 |
| Steel City Services Limited | Manufacturing | 2026 |
| Steel City Site Services Ltd | Other services | 2017 |
| Steel City Solutions Limited | Real estate | 2018 |
| Steel City Trading Ltd | Administrative & support | 2021 |
| Steel Forgings Limited | Manufacturing | 2004 |
| Steel Lens Productions Limited | Information & communication | 2023 |
| Steel Shock Ltd | Information & communication | 2025 |
| Steel Tech Solutions Limited | Construction | 2016 |
| Steeple Associates (Holdings) Limited | Financial services | 2020 |
| Steeton Pharma Limited | Professional & scientific | 2021 |
| Stefan&Stefan Ltd | Transport & logistics | 2017 |
| Stellar Rigging Services Limited | Information & communication | 2015 |
| Stem Electrical & Electronics Ltd | Construction | 2022 |
| Stephanie Seddon Mortgages Limited | Financial services | 2020 |
| Stephen Wadsley & Co Ltd | Hospitality | 2026 |
| Stephenson Training Limited | Information & communication | 2021 |
| Steptoes Cafe & Bar Ltd | Hospitality | 2020 |
| Stepup Training Ltd | Administrative & support | 2021 |
| Sterk Ltd. | Manufacturing | 2023 |
| Sterling Estate Services Ltd | Households | 2026 |
| Sterling Global Investments Ltd | Administrative & support | 2017 |
| Sterling Group Estates Ltd | Hospitality | 2026 |
| Sterling Tech Ltd | Information & communication | 2024 |
| Steve Beech Property Management Ltd | Real estate | 2016 |
| Steve Cotton Transport Ltd | Transport & logistics | 2002 |
| Steve Wade Construction Limited | Construction | 2017 |
| Steve Wilson Contracting Services (Swcs) Ltd | Professional & scientific | 2025 |
| Steve Winks Carvings Ltd | Other services | 2024 |
| Steve's Stoves & Home Improvements Ltd | Construction | 2021 |
| Steve's Whippy Ltd | Hospitality | 2023 |
| Steven Maiden Consultancy Ltd | Professional & scientific | 2023 |
| Steven Taylor Investments Ltd | Real estate | 2019 |
| Stewart Developments Limited | Construction | 2010 |
| Stickland Engineering Limited | Professional & scientific | 1996 |
| Stitch Express Rotherham Limited | Other services | 2025 |
| Stitchesbykenny Ltd | Professional & scientific | 2025 |
| STJ Designs Limited | Wholesale & retail | 2022 |
| STM Motor Group Ltd | Wholesale & retail | 2023 |
| Stockhill Properties Ltd | Real estate | 2019 |
| Stocks Financial Consulting Ltd | Professional & scientific | 2025 |
| Stocks Holding Ltd | Professional & scientific | 2025 |
| Stocksoft Ltd | Administrative & support | 2017 |
| Stocksoft Research Ltd | Information & communication | 2021 |
| Stonecroft Property Investments Limited | Construction | 2025 |
| Stonefield (2010) Limited | Manufacturing | 2010 |
| Stonefield Developments Ltd | Real estate | 2020 |
| Stonehurst Limited | Real estate | 2023 |
| Stones & Sleepers Ltd | Administrative & support | 2017 |