| Stephen Mann Associates Limited | Administrative & support | 2013 |
| Stephen Mcgivern Consultancy Limited | Information & communication | 2013 |
| Stepspeed Limited | Construction | 1987 |
| Sterling Building Contracts Limited | Construction | 2009 |
| Stevans Ltd | Information & communication | 2024 |
| Steve Warrior Motorsport Limited | Arts & recreation | 2006 |
| Stevens Services Ltd | Water & waste | 2020 |
| Stirling Knight Limited | Professional & scientific | 2013 |
| Stirling Reid Associates Limited | Administrative & support | 2001 |
| Stirling Technical Engineering Ltd. | Professional & scientific | 1992 |
| Stitch AI Limited | Information & communication | 2018 |
| Stitch and Tailor Ltd | Manufacturing | 2025 |
| Stockcheck South Limited | Professional & scientific | 2022 |
| Stogey Records Ltd | Wholesale & retail | 2020 |
| Stoke Road (Cobham) Management Company Limited | Households | 2009 |
| Stol Holdings Limited | Information & communication | 2025 |
| Stone 62 Property Solutions Ltd | Real estate | 2026 |
| Stone Barn Limited | Hospitality | 2015 |
| Stone Park Developments Ltd | Construction | 2020 |
| Stonecourt & Company Limited | Professional & scientific | 2011 |
| Stonecourt Consulting Limited | Professional & scientific | 2012 |
| Stormform Limited | Wholesale & retail | 2022 |
| Story Storks & Co. Ltd | Education | 2013 |
| Storycentral Ltd | Professional & scientific | 2012 |
| Storym Emea Limited | Wholesale & retail | 2012 |
| Straightforward PM Ltd | Information & communication | 2022 |
| Stratagem Consulting Services Ltd. | Information & communication | 2017 |
| Stratos Building Services Limited | Administrative & support | 2007 |
| Stratos Property Partners LLP | | 2018 |
| Stratosphere Land Ltd | Construction | 2021 |
| Stray Sheep Services Limited | Water & waste | 2019 |
| Streetscape Limited | Real estate | 2026 |
| Strength in Numbers Fitness Limited | Other services | 2017 |
| Strength in Numbers Training Limited | Other services | 2017 |
| Stretch Event Productions Ltd. | Other services | 2012 |
| Stretch Studio London Limited | Wholesale & retail | 2023 |
| Stride Consulting Engineers Ltd | Professional & scientific | 2020 |
| Stripes SA Ltd | Wholesale & retail | 2018 |
| Stroke of Success Limited | Professional & scientific | 2010 |
| Strongpoint Group Ltd | Financial services | 2019 |
| Struan Advisors Limited | Real estate | 2013 |
| STS Specialist Technical Services UK Limited | Construction | 2015 |
| Studio 3 Creatives Ltd | Professional & scientific | 2020 |
| Studio Blease Ltd | Arts & recreation | 2017 |
| Studio DOT Ltd | Professional & scientific | 2021 |
| Studio Gabby Ltd | Professional & scientific | 2023 |
| Studio Galanta Ltd | Professional & scientific | 2025 |
| Studio Rollins Ltd | Financial services | 2026 |
| Studio Wanda Ltd | Professional & scientific | 2026 |
| Studio Webb Ltd | Administrative & support | 2007 |
| Studio Weekend Limited | Information & communication | 2016 |
| Studio Zach Zono Ltd | Arts & recreation | 2025 |
| STUDIO1690 Ltd | Information & communication | 2026 |
| Studiosh Ltd | Professional & scientific | 2022 |
| Studiotungsten Ltd | Wholesale & retail | 2015 |
| Study and Play America Limited | Arts & recreation | 2016 |
| Stunning Boutique Limited | Wholesale & retail | 2016 |
| Stylish Resorts Luxury Travel LLP | | 2014 |
| Success Living Limited | Information & communication | 2021 |
| Successworks Services Limited | Information & communication | 2021 |
| Sukara Ltd | Wholesale & retail | 2019 |
| Summer Films Limited | Information & communication | 2017 |
| Summerfield House Day Nursery Limited | Education | 1990 |
| Summerhill 10 Ltd | Real estate | 2023 |
| Summerhill 11 Ltd | Real estate | 2024 |
| Summerhill Commercial Limited | Professional & scientific | 2023 |
| Summerhill Consultancy Limited | Professional & scientific | 2024 |
| Summit Fever Media Limited | Information & communication | 2022 |
| Sun & EM Ltd | Real estate | 2021 |
| Sun (Europe) Limited | Administrative & support | 1997 |
| Sundag Limited | Construction | 2023 |
| Sunrise Kids Care Ltd | Health & social care | 2024 |
| Sunshine Care Group Ltd | Health & social care | 2020 |
| Sunshine Commercial Services Limited | Administrative & support | 2005 |
| Superb Sport Ltd | Administrative & support | 2015 |
| Superpath Private Limited | Health & social care | 2026 |
| Support Tiffin Girls' School Company | Education | 1998 |
| Supreme Discount Store Ltd | Wholesale & retail | 2025 |
| Surbiton Construction Services Limited | Construction | 2023 |
| Surbiton COURT(NO.2)RESIDENTS Association Limited | Households | 1965 |
| Surbiton Cutz Ltd | Other services | 2025 |
| Sure Planning Permissions Limited | Professional & scientific | 2012 |
| Sure Type Roofing Limited | Construction | 2025 |
| Surestat Ltd | Information & communication | 2014 |
| Surrey Building Company Limited | Construction | 1984 |
| Surrey Dive Centre Limited | Administrative & support | 2009 |
| Surrey Electric Blind Co Limited | Manufacturing | 2026 |
| Surrey Hills Diving Limited | Arts & recreation | 2025 |
| Surrey Ironcraft Ltd | Manufacturing | 2019 |
| Surrey Love Ltd | Health & social care | 2024 |
| Surrey Metabolic Services Limited | Health & social care | 2012 |
| Surrey Property Partners Ltd | Real estate | 2024 |
| Surround Vision Limited | Information & communication | 2013 |
| Surtees Groundwork Contractors Limited | Construction | 1991 |
| Surveyed Properties Limited | Construction | 1952 |
| Susan Gold Limited | Hospitality | 2000 |
| Susann SU Ltd | Real estate | 2021 |
| Susie Granger - SME Support Services Ltd | Professional & scientific | 2006 |
| Sussex Gynaecological Limited | Health & social care | 2015 |
| Sustainable Collaborations Limited | Professional & scientific | 2024 |