| Steven Hewlett Thatchers Limited | Construction | 2018 |
| Steven James Limited | Administrative & support | 2014 |
| Stevenson Country Services Ltd | Agriculture & fishing | 2020 |
| Stewart Wray Limited | Real estate | 2026 |
| Stickleberries Day Nursery Limited | Health & social care | 2015 |
| Stitch Designworks Limited | Wholesale & retail | 2001 |
| STM Roadhaul Limited | Transport & logistics | 1982 |
| Stock Electronics Ltd. | Manufacturing | 2013 |
| Stockbridge Marquees Limited | Administrative & support | 2021 |
| Stockton Road Management Company Ltd | Real estate | 2014 |
| Stockton Trustees Limited | Professional & scientific | 2021 |
| Stoffersons Limited | Other services | 2011 |
| Stokes MEP Limited | Extraterritorial | 2002 |
| Stone & Canvas Ltd | Real estate | 2017 |
| Stone & Mason Limited | Wholesale & retail | 2017 |
| Stonebury Functions Ltd | Hospitality | 2023 |
| Stonehenge Ales Limited | Manufacturing | 1998 |
| Stonehenge Cabin Ltd | Hospitality | 2025 |
| Stonehenge Campsite Limited | Hospitality | 2014 |
| Stonehenge Classics Ltd | Wholesale & retail | 2025 |
| Stonehenge Crossfit Limited | Arts & recreation | 2014 |
| Stonehenge Deluxe Tours Ltd | Administrative & support | 2026 |
| Stonehenge Developments Limited | Construction | 2017 |
| Stonehenge Distillery Limited | Manufacturing | 2018 |
| Stonehenge Drivehub Cars & Vans Ltd | Wholesale & retail | 2026 |
| Stonehenge Farmhouse LLP | | 2005 |
| Stonehenge Fencing & Landscape Limited | Administrative & support | 2023 |
| Stonehenge Films Limited | Information & communication | 1995 |
| Stonehenge Masons Limited | Construction | 2024 |
| Stonehenge Payrolls Ltd | Administrative & support | 2010 |
| Stonehenge Plumbing and Heating Ltd | Construction | 2015 |
| Stonehenge Preservation Ltd | Construction | 2025 |
| Stonehenge Property Limited | Hospitality | 2019 |
| Stonehenge Recovery Ltd | Wholesale & retail | 2022 |
| Stonehenge Scaffolding Ltd | Construction | 2022 |
| Stonehenge Spring Water Limited | Manufacturing | 2014 |
| Stonehengeshepherdshuts Ltd | Manufacturing | 2020 |
| Stonemasons Yard Management Limited | Real estate | 2007 |
| Stonephoto Limited | Professional & scientific | 2010 |
| Stones & Country Property Ltd | Real estate | 2024 |
| Stones Doggy Daycare Ltd | Other services | 2020 |
| Storageworks Limited | Professional & scientific | 1991 |
| Stories in the Dust Ltd | Education | 2025 |
| Storkit Meadows Management Company Limited | Households | 2016 |
| Storm (Doncaster Road) Management Company Limited | Households | 2005 |
| Storm Building and Civil Engineering Ltd | Real estate | 2006 |
| Stormkestrel Limited | Information & communication | 2021 |
| Stormlake Limited | Arts & recreation | 2025 |
| Stour Fabrications Limited | Construction | 1989 |
| Stovold Consultancy Ltd | Professional & scientific | 2023 |
| Stow & Doran Properties Ltd | Real estate | 2015 |
| Stowic Limited | Professional & scientific | 1997 |
| Strameno Ltd | Professional & scientific | 2018 |
| Strancliffe Gardens Management Company Limited | Extraterritorial | 2015 |
| Strang Limited | Agriculture & fishing | 1999 |
| Strata Aero Ltd | Transport & logistics | 2025 |
| Strategia Worldwide Limited | Professional & scientific | 2015 |
| Strategic Review Limited | Information & communication | 2008 |
| Strategic Shield Global Ltd | Wholesale & retail | 2015 |
| Stratford Nature Reserve Limited | Arts & recreation | 2014 |
| Stratford Road (Milton Keynes) Management Company Limited | Households | 2012 |
| Stratford Social Club Ltd | Hospitality | 2019 |
| Stratton Court (Cardiff) Management Company Limited | Households | 2008 |
| Streamline Strategists Limited | Information & communication | 2024 |
| Streets Installations Limited | Wholesale & retail | 2019 |
| Streets Process Colour Limited | Manufacturing | 2012 |
| Stribre Limited | Professional & scientific | 2017 |
| Stride Digital Limited | Professional & scientific | 2025 |
| Strong Accounting Services Limited | Professional & scientific | 2009 |
| Stroud Apartments Management Company Limited | Households | 2006 |
| Stroud House Management Company Limited | Real estate | 2006 |
| Stroud Place Estate Management Company Limited | Households | 2006 |
| Structureview Surveyors Ltd | Professional & scientific | 2026 |
| Stuck Duck Ltd | Professional & scientific | 2026 |
| Studio 15 (Salisbury) Limited | Other services | 2019 |
| Studio 339 Limited | Arts & recreation | 2023 |
| Study English in Salisbury Limited | Education | 2019 |
| Studyroomsdirect LLP | | 2013 |
| Style IT Sold Ltd | Other services | 2025 |
| Su-Fix Precast Limited | Construction | 2001 |
| Subline Ltd | Wholesale & retail | 2025 |
| Subsphere Records Ltd | Information & communication | 2011 |
| Success Training 4U Limited | Professional & scientific | 2022 |
| Suds Law Limited | Other services | 2017 |
| SUE Black Ltd | Administrative & support | 2013 |
| Sufinama Ltd | Wholesale & retail | 2021 |
| Sugar Bear Ltd | Wholesale & retail | 2022 |
| Sullivan Court Management Company Limited | Households | 1995 |
| Sullivan’S Select Occasions Ltd | Hospitality | 2025 |
| Sully's Sandwich Bar Limited | Hospitality | 2016 |
| Summer Developments Salisbury Ltd | Real estate | 2021 |
| Summerlock Motors (Sarum) Ltd | Wholesale & retail | 2019 |
| Summerlock Upholstery Ltd | Other services | 2022 |
| Sun Boutique Limited | Hospitality | 2019 |
| Sunbeam Systems Ltd | Professional & scientific | 2025 |
| Sundogs Production Company Ltd | Administrative & support | 2022 |
| Sunflower Camper Limited | Wholesale & retail | 2015 |
| Sunflower Social Work Solutions Ltd | Health & social care | 2010 |
| Sunlight Express Limited | Transport & logistics | 2013 |
| Sunnyside Smart Solutions Ltd | Construction | 2024 |