| SK Estates (Surrey) Limited | Construction | 2020 |
| SK Farnham Limited | Wholesale & retail | 2019 |
| Sketch Architects Limited | Construction | 2018 |
| SKI Hire Direct Limited | Wholesale & retail | 2019 |
| SKI Peak Limited | Administrative & support | 1988 |
| Skill Exchange Ltd | Information & communication | 2010 |
| Skill Exchange UK | Information & communication | 2012 |
| Skillmatcher Limited | Information & communication | 1993 |
| Skinner and Featherstone Partnership LLP | | 2012 |
| Skinner Fourteen Holdings Limited | Financial services | 2023 |
| Skreen Software Ltd | Information & communication | 2026 |
| Sky Aerospace Ltd | Manufacturing | 2024 |
| Sky's the Limit Surrey Limited | Construction | 2019 |
| Skylark (Surrey) Limited | Professional & scientific | 2023 |
| Skyline Real Estate Consultancy Limited | Construction | 2014 |
| Skyworld Aviation Holdings Limited | Professional & scientific | 2009 |
| Skyworld Aviation Limited | Transport & logistics | 1996 |
| Skáld Audio Ltd. | Information & communication | 2023 |
| Slap Shot Investments Ltd | Real estate | 2024 |
| SLH Surface Finishing Ltd | Manufacturing | 2023 |
| Sllo Limited | Professional & scientific | 2026 |
| Small Solutions Limited | Administrative & support | 2002 |
| Smart Desk Services Ltd | Information & communication | 2024 |
| Smart Hydrogen Consulting Limited | Professional & scientific | 2016 |
| Smart Mobile POS Ltd | Information & communication | 2016 |
| Smart Performer Ltd | Education | 2021 |
| Smart UK Holdings Limited | Administrative & support | 2019 |
| Smartcool Systems Limited | Administrative & support | 2014 |
| Smartedge Services Limited | Other services | 2025 |
| Smartends UK Ltd | Information & communication | 2025 |
| Smartway Traffic Management Limited | Construction | 2026 |
| Smastein Holdings Limited | Financial services | 2025 |
| Smastein Limited | Financial services | 2020 |
| SME Alliance Limited | Administrative & support | 2014 |
| SME Marketing Group Limited | Professional & scientific | 2023 |
| Smile Scaffolding Ltd | Construction | 2025 |
| Smith & Gorman Groundwork & Landscapes Limited | Construction | 2021 |
| Smith Construction (Whitchurch) Limited | Professional & scientific | 1995 |
| Smith Construction Limited | Professional & scientific | 1999 |
| SMR Construction and Developments Limited | Construction | 2021 |
| Smsw Media Ltd | Professional & scientific | 2011 |
| SN Mechanical Services Limited | Construction | 2013 |
| Snap Sourcer Limited | Information & communication | 2023 |
| Snhworldwide Limited | Wholesale & retail | 2021 |
| Snilloc Limited | Professional & scientific | 2023 |
| Snouba Limited | Professional & scientific | 2000 |
| Snow Collar Recruitment Ltd | Administrative & support | 2025 |
| Snowbird Assets Limited | Real estate | 2021 |
| Snowhouse International Ltd | Real estate | 2021 |
| SNS Software Ltd | Information & communication | 2025 |
| Snushaven Ltd | Wholesale & retail | 2024 |
| SO Tasty Limited | Hospitality | 2007 |
| Soane Place Residents Management Co Ltd | Households | 2022 |
| Soberilliant Performance Coaching Ltd | Health & social care | 2025 |
| Sociolytics Ltd | Information & communication | 2018 |
| Softest Ltd | Information & communication | 2025 |
| Soks Holdings Limited | Real estate | 2021 |
| SOL E MAR Financial Limited | Financial services | 2013 |
| Solacepropertysolutions Ltd | Real estate | 2025 |
| Solar Products Limited | Financial services | 2002 |
| Solarecologist Ltd | Energy | 2017 |
| Solarstar Aquatic Furniture Ltd | Agriculture & fishing | 2021 |
| Soleas Footwear Ltd | Professional & scientific | 2024 |
| Solenoart Ltd | Hospitality | 2025 |
| Solent Child Care Limited | Health & social care | 2015 |
| Solent Next Steps Limited | Health & social care | 2024 |
| Soliberico Limited | Professional & scientific | 2019 |
| Solid Software Development Ltd | Information & communication | 2018 |
| Solution Sales Advisors Ltd | Information & communication | 2024 |
| Soma Medical Clinic Ltd | Health & social care | 2025 |
| Sonderai Limited | Professional & scientific | 2025 |
| Songsiren Music Limited | Arts & recreation | 2006 |
| Sonia Ferdous UK Limited | Real estate | 2024 |
| Sora Clinic Ltd | Health & social care | 2025 |
| Sotaki Ltd | Professional & scientific | 2014 |
| Sots Investments Limited | Real estate | 2024 |
| Soulspace (Farnham) Limited | Arts & recreation | 2023 |
| Soulspace Retreats Limited | Administrative & support | 2023 |
| Soulspace TTC Limited | Education | 2023 |
| Sound Planning Limited | Construction | 2007 |
| SOUND4PICTURES Limited | Information & communication | 2011 |
| Soundbridge Media Ltd | Professional & scientific | 2026 |
| Soundesign Limited | Information & communication | 1999 |
| Sourcat Limited | Wholesale & retail | 2017 |
| Source Investments Ltd | Real estate | 2019 |
| Source Trading Limited | Wholesale & retail | 1999 |
| Source Trading Overseas LLP | | 2011 |
| South Alliance Investments Limited | Real estate | 2017 |
| South Bay Consulting Limited | Professional & scientific | 2024 |
| South Downs Capital Advisory Limited | Professional & scientific | 2020 |
| South Farnham Educational Trust | Education | 2011 |
| South Farnham Enterprises Ltd | Education | 2022 |
| South Farnham School Services Limited | Education | 1991 |
| South Grays Consulting Limited | Professional & scientific | 2021 |
| Southbury Estates Limited | Real estate | 2022 |
| Southeast Hospitality Ltd | Hospitality | 2023 |
| Southern Area Doors Ltd | Manufacturing | 2025 |
| Southern Ceramics Ltd | Construction | 2018 |
| Southern Counties Farming Ltd | Agriculture & fishing | 2026 |
| Southern Counties Schools Judo Limited | Education | 2003 |