| Semaphore Management Company Limited | Households | 2003 |
| Semiconductor Supplies International Limited | Wholesale & retail | 2010 |
| Semj IT Services Limited | Information & communication | 2025 |
| Senwood Ltd | Construction | 2020 |
| Sepalamo Consulting Ltd | Professional & scientific | 2018 |
| Serendip Holdings Limited | Real estate | 2016 |
| Seruling Consult Ltd | Information & communication | 2024 |
| Seruling Services Limited | Professional & scientific | 2012 |
| Services on TAP Ltd | Construction | 2020 |
| Servnet Limited | Information & communication | 2003 |
| SES (Engineering Services) Limited | Construction | 1961 |
| SES Engineering (Holdings) Limited | Financial services | 2023 |
| Sevagram Productions Limited | Administrative & support | 2003 |
| Sevay Consultancy Ltd | Professional & scientific | 2020 |
| Sevendale Fernhill Limited | Construction | 2023 |
| Sevendale Horsley Limited | Construction | 2024 |
| Sevendale Limited | Construction | 2022 |
| Sevendale Orchard Way Limited | Construction | 2023 |
| Sevendale Tooting Limited | Construction | 2024 |
| SEW British Ltd | Manufacturing | 2020 |
| Shaddai Health Care Services Ltd | Health & social care | 2025 |
| Shafishamsudinkerala Limited | Health & social care | 2015 |
| Shellwood (Dorking) Management Company Limited | Households | 1983 |
| Sherwood (Ditton Hill) Residents Association Limited | Households | 1966 |
| Shmo Investments Limited | Financial services | 2026 |
| Shoot Sport Limited | Arts & recreation | 2025 |
| Shorwell Investments Limited | Real estate | 2026 |
| Shovel & Spade Limited | Administrative & support | 2017 |
| Shred and Butta Ltd | Other services | 2013 |
| Shtos Ltd | Wholesale & retail | 2024 |
| Shuttlewood Consulting Limited | Information & communication | 2024 |
| Sigma 6 Services Ltd | Professional & scientific | 2022 |
| Sigma Rock Ltd | Real estate | 2022 |
| Signature Living Group Ltd | Construction | 2016 |
| Signature Wates Residential LLP | | 2017 |
| Signsurrey Ltd | Professional & scientific | 2023 |
| Silicon Circle Limited | Information & communication | 2024 |
| Silkmore Gardens Ltd | Households | 2022 |
| Silune Ltd | Wholesale & retail | 2025 |
| Silvana JOB Productions Limited | Information & communication | 2013 |
| Silver Arrows Limited | Transport & logistics | 2006 |
| Silverback Plumbing Ltd | Construction | 2024 |
| Silverjen Real Estates Limited | Real estate | 2020 |
| Silvertouch Limited | Information & communication | 2000 |
| Simner Construction Limited | Construction | 2016 |
| Simner Rentals Ltd | Hospitality | 2022 |
| Simonws Services Limited | Professional & scientific | 2022 |
| SIR William Reardon Smith & Sons Limited | Transport & logistics | 1990 |
| SKF Credit Opportunities Limited | Financial services | 2025 |
| Skinny Cat Limited | Professional & scientific | 2012 |
| Skirmish Limited | Other services | 2000 |
| Skoops D S Limited | Hospitality | 2021 |
| Skyline Power Plants Limited | Wholesale & retail | 2024 |
| SM Stag Ltd | Information & communication | 2025 |
| SM1 Consulting Limited | Professional & scientific | 2014 |
| Small Properties Ltd | Real estate | 2022 |
| Smallfields Living Ltd | Construction | 2023 |
| Smart Design & Construction Limited | Construction | 2019 |
| Smarter Cover Limited | Financial services | 2010 |
| Smedley Advisory Limited | Professional & scientific | 2014 |
| Smithers Information Limited | Professional & scientific | 1999 |
| Snap Sponsorship Ltd | Administrative & support | 2012 |
| Snapoutlet Ltd | Wholesale & retail | 2025 |
| Snowprints Limited | Professional & scientific | 2017 |
| Soala Limited | Other services | 2023 |
| Soceng (Social Engineering) Ltd | Professional & scientific | 2009 |
| Sociuseducation Ltd | Information & communication | 2025 |
| Soil and Soul Studio Ltd | Wholesale & retail | 2026 |
| Solar Grow Global Limited | Manufacturing | 2018 |
| Sole Farm Close (Bookham) Limited | Professional & scientific | 2004 |
| Solo Property Solutions Ltd | Real estate | 2022 |
| Solution 22 Holdings Limited | Financial services | 2024 |
| Solution 22 Limited | Administrative & support | 2012 |
| Solutions Revolution Ltd | Information & communication | 2022 |
| Solva Limited | Professional & scientific | 2015 |
| Something Borrowed Photography Ltd | Professional & scientific | 2018 |
| Something Uniquely Different Limited | Wholesale & retail | 2011 |
| Sonarhub Limited | Information & communication | 2017 |
| Sonoma Partners Ltd | Financial services | 2015 |
| Sopwith House Residents' Association Limited | Households | 1996 |
| Soucan Limited | Households | 2020 |
| Soul Comfort Wellness Ltd. | Education | 2023 |
| Soul Security Services Limited | Administrative & support | 2024 |
| South Bookham Space Limited | Arts & recreation | 2010 |
| South Croydon Living Ltd | Construction | 2023 |
| South Riding Consultancy Ltd | Financial services | 2015 |
| Southern BUS Preservation Group Limited | Other services | 2024 |
| Southern Counties Services (Mechanical) Limited | Construction | 2016 |
| Southern Counties Services Ltd | Construction | 2008 |
| Southern Fire & Security Limited | Construction | 2017 |
| Southern Screed Ltd | Administrative & support | 2016 |
| Southern Tools Limited | Manufacturing | 1992 |
| Southern-Side Audio Limited | Information & communication | 2024 |
| Southview Court (Woking) Association Limited | Households | 1961 |
| Sovereign Place Limited | Households | 2004 |
| Spanish Language Services Limited | Education | 2006 |
| Sparkles Healthcare Ltd | Health & social care | 2020 |
| Spbm Construction Limited | Construction | 2017 |
| Spec Engineering Ltd | Construction | 2023 |
| Spec Holdings Ltd | Professional & scientific | 2025 |