| Starr Associates Ltd. | Professional & scientific | 2012 |
| Status Audio Visual Limited | Professional & scientific | 2007 |
| Staysafe Compliance Limited | Professional & scientific | 2024 |
| Stealth West Ltd | Professional & scientific | 2024 |
| Steamers Cafes Limited | Hospitality | 2004 |
| Steel Buildings & Construction UK Ltd | Manufacturing | 2025 |
| Steel PAD Joinery Ltd | Manufacturing | 2020 |
| Steel Window Cleaning Ltd | Administrative & support | 2019 |
| Stehr Consulting Ltd | Professional & scientific | 2022 |
| Stella Catering Limited | Hospitality | 2017 |
| Stella Event Hire Limited | Administrative & support | 2012 |
| Stellar Pet Services Limited | Professional & scientific | 2020 |
| Stenning Holdings Ltd | Professional & scientific | 2026 |
| Step One Security Ltd | Administrative & support | 2025 |
| Stephanie Driver Communications Ltd | Professional & scientific | 2020 |
| Stephen Kingshott Building Consultancy Ltd | Administrative & support | 2013 |
| Stephen Paul Limited | Health & social care | 2023 |
| Stephen Rose Renovations Ltd | Construction | 2015 |
| Steps Forward Limited | Professional & scientific | 2021 |
| Steve Ferris Ltd | Wholesale & retail | 2017 |
| Steve Innes Plant Hire Ltd | Construction | 2018 |
| Steve Thomas Communications Consulting Limited | Professional & scientific | 2020 |
| Steve Tuck Carpentry & Joinery Limited | Construction | 2005 |
| Steve Webster Strategic Finance Limited | Professional & scientific | 2021 |
| Steve's Appliance Services Limited | Other services | 2010 |
| Steve's Car and Commercial Limited | Wholesale & retail | 2018 |
| STEVEDOP1 Limited | Professional & scientific | 2018 |
| Stevenson Health and Care Ltd | Health & social care | 2024 |
| Stevensons' Homes Limited | Real estate | 2016 |
| Stewart Residential Lettings Limited | Real estate | 2018 |
| Stirling Jones Solutions Limited | Information & communication | 2025 |
| STK Investments Limited | Real estate | 2014 |
| Stock Plus Positive Farm Advice Limited | Professional & scientific | 2012 |
| Stokes Enterprises Ltd | Households | 2012 |
| Stone Art Fireplaces Ltd | Construction | 2011 |
| Stonegate Agriculture Limited | Agriculture & fishing | 1992 |
| Stonegate Farmers Limited | Agriculture & fishing | 1962 |
| Stonegate Food Group Limited | Financial services | 2018 |
| Stonegate Renewable Energy Ltd | Energy | 2021 |
| Stonehill Construction Ltd | Construction | 2018 |
| Stonehouse Software Limited | Information & communication | 2001 |
| Stoneoak Construction Ltd | Construction | 2014 |
| Stonewood Builders Holdings Limited | Financial services | 2018 |
| Stonewood Builders Limited | Construction | 2001 |
| Stonewood Group Ltd | Other services | 2020 |
| Stonewood Homes (Tetbury) Ltd | Construction | 2020 |
| Stonewood Homes Cadmus Rock (Ufton Green) Limited | Construction | 2022 |
| Stonewood Homes Limited | Construction | 2018 |
| Stonewood Partnerships (Beckington) Ltd | Construction | 2020 |
| Stonewood Partnerships (Bell Hill) Limited | Construction | 2021 |
| Stonewood Partnerships (Hambrook) Limited | Construction | 2021 |
| Stonewood Partnerships (Pudding PIE) Limited | Real estate | 2021 |
| Stonewood Partnerships (RGI) Sandford Limited | Construction | 2021 |
| Stonewood Partnerships (Severn Beach) Limited | Construction | 2022 |
| Stonewood Partnerships (Uplands RGI) Ltd | Construction | 2022 |
| Stonewood Partnerships (Woodlands) Limited | Construction | 2021 |
| Stonewood Properties Limited | Real estate | 2009 |
| Storrington Homes Limited | Construction | 2022 |
| STR8 Holdings Limited | Financial services | 2017 |
| Straight Solutions Limited | Financial services | 2004 |
| Straighttalk Creatives Ltd | Professional & scientific | 2024 |
| Strategic Innovation Ltd | Professional & scientific | 2001 |
| Strategic Leap Resourcing Ltd | Professional & scientific | 2015 |
| Strattons and Partners Ltd | Real estate | 2019 |
| Strictly Stretch Tents Limited | Administrative & support | 2024 |
| Strike Precision Therapeutics Ltd | Professional & scientific | 2025 |
| Strive Solutions Limited | Professional & scientific | 2008 |
| Strong Family Holdings Limited | Real estate | 2016 |
| Strong Ventures Limited | Wholesale & retail | 2026 |
| Strongarm Digital Ltd | Information & communication | 2019 |
| Stuart Pitman Builders Ltd | Construction | 2016 |
| Stuart Read Trading Limited | Information & communication | 1998 |
| Studio Haus Creative Ltd | Arts & recreation | 2019 |
| Studio Hire Limited | Professional & scientific | 2004 |
| Studio Inventiv Ltd | Information & communication | 2024 |
| Studio Melville Limited | Arts & recreation | 2016 |
| Studio NX Limited | Information & communication | 2013 |
| Studio Thirty Three Ltd | Wholesale & retail | 2020 |
| Studio Wilson Ltd | Information & communication | 2024 |
| Studiolite Ltd | Professional & scientific | 2022 |
| Subiros Ltd | Information & communication | 2018 |
| Submerge Wallets Ltd | Wholesale & retail | 2020 |
| SUE Dicks Limited | Professional & scientific | 2025 |
| Sugar & Sloth Ltd | Wholesale & retail | 2019 |
| Sulis Electrical Services Ltd | Construction | 2017 |
| Sumbler Bros Limited | Wholesale & retail | 1999 |
| Sumgib Holdings Limited | Financial services | 2018 |
| Summit Connections Limited | Wholesale & retail | 2003 |
| Sun & Sea Lettings Ltd | Real estate | 2023 |
| Sundey Hill Summer Schools Limited | Agriculture & fishing | 1999 |
| Sunnyside Accountancy Ltd | Professional & scientific | 2020 |
| Super AD Group Limited | Wholesale & retail | 2018 |
| Super Clean South Limited | Administrative & support | 2008 |
| Super Motion Ltd | Information & communication | 2020 |
| SUPER9 Media Ltd | Information & communication | 2017 |
| Supernatural Food Limited | Manufacturing | 2016 |
| Supporto Ltd | Manufacturing | 2004 |
| Supreme Stay Ltd | Hospitality | 2021 |
| Supremeindiankitchen 2 Ltd | Hospitality | 2025 |
| Surface Clean UK Limited | Other services | 2019 |