| Stantec Limited | Financial services | 2024 |
| Stantec Middle East Limited | Information & communication | 1999 |
| Stantec Oceania Limited | Professional & scientific | 2017 |
| Stantec UK Limited | Information & communication | 1974 |
| Stanton ALS Limited | Other services | 2017 |
| Stanway Consultancy Limited | Professional & scientific | 2017 |
| Stanways Bakery Limited | Hospitality | 2008 |
| Stapeley Management Consultancy Limited | Professional & scientific | 2021 |
| Star Business Analysis Limited | Professional & scientific | 2013 |
| Star Homes Manchester Limited | Real estate | 2022 |
| Star Process Limited | Professional & scientific | 2019 |
| Star Vehicles Limited | Wholesale & retail | 2023 |
| Starco Commercial Limited | Administrative & support | 2008 |
| Starglamour MED Ltd | Other services | 2022 |
| Starks Developments Ltd | Real estate | 2020 |
| Starky Estates Ltd | Real estate | 2017 |
| Starlights Studio Ltd | Education | 2026 |
| Starlinks Global Limited | Transport & logistics | 2022 |
| Starlolly Limited | Wholesale & retail | 2017 |
| Statham House Limited | Real estate | 1986 |
| Station House PUB & Dining Ltd | Hospitality | 2025 |
| Statistically Significant Ltd | Information & communication | 2022 |
| STATUS200 Ltd | Information & communication | 2017 |
| Stay Leisure Limited | Hospitality | 2025 |
| Stay on Board Ltd | Hospitality | 2019 |
| Stay Safe Go Ltd | Administrative & support | 2025 |
| Staybills Hire Limited | Construction | 2007 |
| Staybills Limited | Professional & scientific | 2016 |
| STB Casings Limited | Wholesale & retail | 1996 |
| Steadfast Freight Limited | Transport & logistics | 2004 |
| Steady Trail Limited | Professional & scientific | 2005 |
| Steakhouse Horwich Limited | Hospitality | 2025 |
| Steam Turbine Services Limited | Professional & scientific | 2023 |
| Sted Business Solutions Ltd | Professional & scientific | 2010 |
| Steel & Glory Ltd | Information & communication | 2026 |
| Steel Glass Installations Limited | Manufacturing | 2020 |
| Steel Glass UK Ltd | Manufacturing | 2019 |
| Steel Poppy Limited | Financial services | 2021 |
| Steel U Pins Limited | Manufacturing | 2019 |
| Steele Software Ltd | Information & communication | 2021 |
| Steels Solicitors Limited | Professional & scientific | 2001 |
| Steery Consulting Limited | Information & communication | 2010 |
| Stek Property Management Ltd | Real estate | 2024 |
| Stella Corradi Limited | Information & communication | 2021 |
| Stellar Gates Ltd | Wholesale & retail | 2015 |
| Stellar IT Consulting Ltd | Information & communication | 2024 |
| Stellar Private Ltd | Real estate | 2023 |
| Stellian Limited | Administrative & support | 2026 |
| Stellig Group Ltd | Information & communication | 2020 |
| Stellor Estates Ltd | Real estate | 2019 |
| Stelyn Rentals SPV Ltd | Real estate | 2026 |
| Stem Tech Services Limited | Other services | 2018 |
| Stenfield(Nw) Ltd | Administrative & support | 2010 |
| Stenrik Limited | Administrative & support | 2015 |
| Stenton Jones Holdings Limited | Financial services | 2025 |
| Step Change Consultancy Limited | Information & communication | 2019 |
| Stephanie Mckay Aesthetics Ltd | Other services | 2024 |
| Stephen Coady Limited | Administrative & support | 2014 |
| Stephen James Cars of Distinction Limited | Wholesale & retail | 2010 |
| Stephen Lawrence Order Comms Consulting Limited | Information & communication | 2017 |
| Stephen Parkinson Consulting Ltd | Information & communication | 2020 |
| Stephen Prince Installations Ltd | Construction | 2026 |
| Stephen Williams Transport Limited | Transport & logistics | 2003 |
| Stephenson Marine Engineering Limited | Administrative & support | 2016 |
| Stephenson Quantity Surveying Ltd | Professional & scientific | 2019 |
| Stepping Stones Nurseries Group Limited | Education | 1992 |
| Stepping Stones Nurseries Limited | Education | 1997 |
| Steps Charity | Health & social care | 2002 |
| Steps ENG Ltd | Administrative & support | 2025 |
| Steps Marketing Services Ltd | Professional & scientific | 2023 |
| Steps Strategies Ltd | Professional & scientific | 2025 |
| Stepz GT Ltd | Wholesale & retail | 2023 |
| Sterling (1682) Limited | Other services | 2003 |
| Sterling (2000) Limited | Real estate | 1998 |
| Sterling (CIS) Limited | Construction | 2005 |
| Sterling 2000 (Holdings) Limited | Professional & scientific | 2008 |
| Sterling 2000 Group Limited | Financial services | 2016 |
| Sterling Aluminium Systems Limited | Manufacturing | 2012 |
| Sterling Engineering Systems Limited | Administrative & support | 2015 |
| Sterling Home Maintenance Limited | Manufacturing | 2013 |
| Sterling Professional Consultancy Limited | Financial services | 2014 |
| Sterling PVC Limited | Manufacturing | 2012 |
| Sterling Pvcu (NW) Limited | Manufacturing | 2013 |
| Sterling Pvcu (Warrington) Limited | Manufacturing | 2013 |
| Sterling Pvcu Products Limited | Manufacturing | 2013 |
| Sterling Pvcu Windows, Doors & Conservatories Limited | Manufacturing | 2013 |
| Sterling Solutions Rail Limited | Administrative & support | 1999 |
| Sterling Upvc Limited | Manufacturing | 2013 |
| Steve B Graphics Studio Ltd | Administrative & support | 2021 |
| Steve Clark Safety Ltd | Administrative & support | 2023 |
| Steve Collyer Ltd | Administrative & support | 2015 |
| Steve Hunt Partnership Ltd | Construction | 1999 |
| Steve Jennings Associates Limited | Administrative & support | 2009 |
| Steve Marsh Express Limited | Transport & logistics | 2003 |
| Steve Metcalfe Services Limited | Administrative & support | 2007 |
| Steve Orchard & SON Limited | Construction | 2015 |
| Steve Risk Management Ltd | Administrative & support | 2024 |
| Steve Sinnett Electrical Limited | Professional & scientific | 2017 |
| Steve Stewart Design Limited | Administrative & support | 2015 |
| Steve Wilson IT Consultancy House Limited | Information & communication | 2023 |