| Stephen Carr Legal Services Limited | Professional & scientific | 2025 |
| Stephenson (Shell & Core) Limited | Construction | 2004 |
| Stephenson Civils Limited | Construction | 2007 |
| Stephenson Construction (North) Limited | Construction | 2007 |
| Stephenson Construction (Southern) Limited | Construction | 2010 |
| Stephenson Development (Ifold) Limited | Construction | 2008 |
| Stephenson Development (Southern) Limited | Construction | 2005 |
| Stephenson Development (Stockton) Limited | Construction | 2015 |
| Stephenson Developments (Southern) Holdings Limited | Professional & scientific | 2007 |
| Stephenson Limited | Construction | 2002 |
| Stephenson Shell & Core (Scotland) Limited | Construction | 2006 |
| Stephenson Shuttering Contractors Limited | Construction | 1954 |
| Sterling Scott Limited | Professional & scientific | 2015 |
| Steve Minto Ltd | Professional & scientific | 2013 |
| Steve Peach Limited | Construction | 2024 |
| Steven Bryer Limited | Construction | 2005 |
| Stevens Equestrian Ltd | Agriculture & fishing | 2024 |
| STF Development Ltd | Information & communication | 2019 |
| STF Marketing Ltd | Information & communication | 2015 |
| Sti-Solutions Limited | Information & communication | 2001 |
| Stiles & Co. Chartered Surveyors Limited | Professional & scientific | 2008 |
| Stockbury Stone Limited | Water & waste | 2025 |
| Stockshare UK Holdings Limited | Information & communication | 2021 |
| Stone Chair Pubs Ltd | Hospitality | 2026 |
| Stone Farm Management Limited | Professional & scientific | 1991 |
| Stoneharbour Developments Ltd | Construction | 2024 |
| Stoneharbour Propco 1 Ltd | Construction | 2024 |
| Stoneharbour Propco 2 Ltd | Construction | 2024 |
| Stoneharbour Propco 3 Ltd | Construction | 2025 |
| Stoneharbour Property Ltd | Real estate | 2025 |
| Stonehenge Value Tours Limited | Administrative & support | 2018 |
| Stonehouse Groundworks Limited | Construction | 2007 |
| Stonerad Limited | Professional & scientific | 1989 |
| Stones Electrical Solutions Ltd | Construction | 2020 |
| Storage Solution Limited | Transport & logistics | 1989 |
| Storelab AI Ltd | Information & communication | 2025 |
| Storm Print & Design Limited | Manufacturing | 2007 |
| Storrington Physiotherapy Clinic Ltd | Health & social care | 2021 |
| Storybar Ltd | Professional & scientific | 2025 |
| Storystock Sounds Limited | Manufacturing | 2022 |
| Storytellers Performing Arts School Ltd | Education | 2023 |
| Stragen UK Limited | Wholesale & retail | 2004 |
| Strategic ABM Ltd | Information & communication | 2020 |
| Strategie & Enterprise Ltd | Professional & scientific | 2015 |
| Stratex Aero Limited | Transport & logistics | 2023 |
| Streat Property Limited | Real estate | 2018 |
| Streeter Group Holdings Limited | Real estate | 1960 |
| Streetfood and More (Film and Corp) Limited | Hospitality | 2021 |
| Streetfood and More Limited | Administrative & support | 2020 |
| Striata Solutions Limited | Professional & scientific | 2014 |
| Striker Networks Limited | Information & communication | 2025 |
| Stringbabies Ltd | Information & communication | 2010 |
| Stripy Tiger Ltd | Professional & scientific | 2025 |
| Stropa Estates Limited | Administrative & support | 2018 |
| Structura Solutions Ltd | Professional & scientific | 2024 |
| Stuart Callaghan Surveyors Ltd | Professional & scientific | 2006 |
| Stuart Heather Fine Bespoke Carpentry & Joinery Ltd | Construction | 2022 |
| Stuarts Motors Limited | Wholesale & retail | 2013 |
| Stublick Estates Limited | Arts & recreation | 1995 |
| Studentours (London) Limited | Hospitality | 1966 |
| Studentours Limited | Other services | 1968 |
| Studio 16 Horsham Ltd | Other services | 2025 |
| Studio Artcher Limited | Construction | 2022 |
| Studio Beacon Ltd | Administrative & support | 2017 |
| Studio FIP Ltd | Arts & recreation | 2016 |
| Studio Here Ltd | Construction | 2015 |
| Studio Hotline Ltd | Arts & recreation | 2025 |
| Studio One Another Ltd | Professional & scientific | 2023 |
| Studioo 28 Ltd | Other services | 2024 |
| Studioon Productions Ltd | Information & communication | 2025 |
| Stulz H+E/Stulz PA Joint Venture Ukeig | | 2013 |
| Stunts & Effects Limited | Information & communication | 2016 |
| SU53 & Compliance Limited | Other services | 2007 |
| Submerj Ltd | Education | 2021 |
| Submersion Studio Limited | Information & communication | 2025 |
| Sudarsan's Consultation Services Ltd | Professional & scientific | 2023 |
| Sugarmoon Fitness Group Ltd | Other services | 2024 |
| SUGGERO360UK Ltd | Transport & logistics | 2014 |
| Suite 6 Limited | Professional & scientific | 2023 |
| Summer Meadow Cowfold Management Ltd | Real estate | 2020 |
| Summer Stars Publishing Limited | Information & communication | 2023 |
| Summerfields Care Homes Limited | Health & social care | 2010 |
| Summerfold Residents Management Company Limited | Households | 2016 |
| Sun Cove Design Studio Ltd | Professional & scientific | 2025 |
| Sun ROW Limited | Real estate | 2021 |
| Sunningdown Limited | Households | 1984 |
| Sunny Space Ltd | Real estate | 2021 |
| Sunnyseaside Ltd | Administrative & support | 2025 |
| Sunshine Nails and Beauty Ltd | Other services | 2022 |
| Super Prix Karting Limited | Real estate | 1991 |
| Supertraining Global Ltd | Other services | 2025 |
| Supertraining Ltd | Other services | 2003 |
| Surefit Installations Ltd | Households | 2014 |
| Surface Monkey Limited | Wholesale & retail | 2020 |
| Surrey & Sussex Buses Limited | Extraterritorial | 2013 |
| Surrey & Sussex Heating Ltd | Construction | 2023 |
| Surrey and Sussex Breastfeeding CIC | Health & social care | 2024 |
| Surrey Freeholds Limited | Construction | 2020 |
| Surrey Hills Wood Fired Pizza Ltd | Hospitality | 2019 |
| Surrey Landscaping & Property Maintenance Limited | Extraterritorial | 2020 |