| Steel Brothers Investments Limited | Real estate | 2025 |
| Steel Drum Cooperation Limited | Manufacturing | 2025 |
| Steel Fixers UK Ltd | Construction | 2014 |
| Steel Product Supplies Limited | Extraterritorial | 2007 |
| Steel Software Solutions Limited | Information & communication | 2000 |
| Steel Span Solutions Limited | Construction | 2026 |
| Steel Thread Ltd | Information & communication | 2018 |
| Steele Groundworks Ltd | Construction | 2020 |
| Steele Plant Hire Ltd | Construction | 2015 |
| Steele Property Limited | Real estate | 2019 |
| Steeleworks Development Limited | Information & communication | 2014 |
| Steelgreens Trading Ltd | Manufacturing | 2021 |
| Steelhoard Limited | Construction | 2007 |
| Steelroot Plumbing Limited | Construction | 2026 |
| Steelstorm Holdings Ltd | Professional & scientific | 2025 |
| Steeltek Structural Steel Limited | Manufacturing | 2013 |
| Steelwork Engineering Services Limited | Manufacturing | 2009 |
| Steelzone UK Access Limited | Manufacturing | 2003 |
| Steeper Holdings Limited | Health & social care | 2005 |
| Steeple Associates Limited | Wholesale & retail | 2004 |
| Steer Assets Limited | Financial services | 2026 |
| Stefan Saunders Academy Ltd | Education | 2025 |
| Steffco Limited | Manufacturing | 1996 |
| Steleo Properties Ltd | Real estate | 2021 |
| Steley Retail Limited | Wholesale & retail | 2025 |
| Stella Energy Transition Limited | Construction | 2023 |
| Stella.B Limited | Real estate | 2021 |
| Stellaris Labs Group Limited | Information & communication | 2026 |
| Stellian Holdings Ltd | Professional & scientific | 2020 |
| Stellings Electrical Ltd | Manufacturing | 2020 |
| Stem Drip 1 Limited | Extraterritorial | 2018 |
| Stemeax Ltd | Wholesale & retail | 2025 |
| Step (Supporting the Elderly People) | Health & social care | 2008 |
| Step Ahead Holdings Ltd | Real estate | 2021 |
| Step Ahead Home Care Ltd | Administrative & support | 2018 |
| Step by Step Mortgages Limited | Administrative & support | 2015 |
| Step Into Wellness Ltd | Other services | 2025 |
| Step UP and Write Ltd | Education | 2022 |
| STEP2SUCCESS Online Ltd | Education | 2023 |
| Stepbranch Limited | Professional & scientific | 2002 |
| Stepchange Equity Release Limited | Professional & scientific | 2012 |
| Stepchange Financial Solutions Limited | Extraterritorial | 2013 |
| Stepchange Voluntary Arrangements Limited | Professional & scientific | 2012 |
| Steph Healthcare Limited | Health & social care | 2021 |
| Stephanie ANN Kemp Law Ltd | Professional & scientific | 2022 |
| Stephen a Brear Gearboxes Limited | Wholesale & retail | 2011 |
| Stephen Bradshaw Limited | Transport & logistics | 2025 |
| Stephen Cameron Ltd | Information & communication | 2018 |
| Stephen Carling Roofing Ltd | Construction | 2013 |
| Stephen Hargreaves Ltd | Transport & logistics | 2003 |
| Stephen Mail Welding Ltd | Manufacturing | 2023 |
| Stephen Mitchell Properties Limited | Real estate | 2009 |
| Stephen Mortin Consulting Ltd | Professional & scientific | 2021 |
| Stephen Priya Limited | Information & communication | 2014 |
| Stephen Sykes Ltd | Information & communication | 2008 |
| Stephen T Johnson Ltd | Construction | 2012 |
| Stephen Wainwright Consultancy Limited | Information & communication | 1996 |
| Stephenson Day Limited | Real estate | 2004 |
| Stephenson Group Ltd | Manufacturing | 1900 |
| Stephenson Hotel Limited | Construction | 2012 |
| Stephensons of Easingwold Limited | Transport & logistics | 2002 |
| Stepney Court Developments Limited | Real estate | 1960 |
| Steppa Vision Ltd | Manufacturing | 2025 |
| Stepping Stones MIR Ltd | Administrative & support | 2026 |
| Stepping Stones Nursery School Ltd | Education | 2009 |
| Steppingstones Daycare & Afterschool Club Ltd | Administrative & support | 2022 |
| Steps Property Solutions Ltd | Real estate | 2026 |
| Stereau (UK) Limited | Water & waste | 1990 |
| Stereo Output Limited | Information & communication | 2018 |
| Stericycle Environmental Services Group Limited | Professional & scientific | 2025 |
| Stericycle International Holdings Canada Limited | Professional & scientific | 2011 |
| Stericycle International Holdings Limited | Professional & scientific | 2011 |
| Stericycle International, Ltd. | Professional & scientific | 2004 |
| Steritrap Limited | Manufacturing | 2026 |
| Sterk Group Ltd | Administrative & support | 2024 |
| Sterling Capitol PLC | Construction | 2007 |
| Sterling Capitol Properties (South Yorkshire ) Limited | Construction | 1994 |
| Sterling Commercial Advisory Ltd | Professional & scientific | 2026 |
| Sterling Cooper Construction Limited | Wholesale & retail | 2012 |
| Sterling Crest Accountants Ltd | Professional & scientific | 2026 |
| Sterling E-Trade Ltd | Wholesale & retail | 2026 |
| Sterling Event Group Holdings Limited | Professional & scientific | 2009 |
| Sterling Joinery Leeds Limited | Construction | 2007 |
| Sterling Properties SPV Ltd | Real estate | 2025 |
| Sterling Rise Management Company Limited | Households | 2021 |
| Sterling Software Limited | Information & communication | 2021 |
| Sterling Stay Limited | Real estate | 2016 |
| Sterling Tyres Ltd | Wholesale & retail | 2024 |
| Sterling Workshop Supplies Ltd | Extraterritorial | 2011 |
| Sternalgia Limited | Financial services | 2024 |
| Sters Transportation Leeds Ltd | Transport & logistics | 2026 |
| Stesam Limited | Real estate | 2013 |
| Steve Academy Limited | Information & communication | 2025 |
| Steve Adams Copywriting Ltd | Professional & scientific | 2024 |
| Steve Bradshaw Consulting Ltd | Professional & scientific | 2025 |
| Steve Dickinson Services Limited | Construction | 2007 |
| Steve Duncombe Financial Planning Ltd | Professional & scientific | 2020 |
| Steve Helm Limited | Wholesale & retail | 2014 |
| Steve Mason Ltd | Construction | 2025 |
| Steve Mcclaren Sports Academy Limited | Arts & recreation | 2019 |