| Spec Kirkuk Refinery Holdings Ltd. | Professional & scientific | 2025 |
| Spec Oredo Refinery (Nigeria) Ltd | Professional & scientific | 2025 |
| Spec Refinery (Pakistan) Ltd | Professional & scientific | 2025 |
| Spec Refinery (South Sudan) Ltd | Professional & scientific | 2025 |
| Spedition Services Limited | Transport & logistics | 1990 |
| Speedball Indoor Cricket Limited | Arts & recreation | 1987 |
| Spence Brickwork Limited | Construction | 2015 |
| Spheria Limited | Administrative & support | 2004 |
| Spoon Studios Ltd | Information & communication | 2021 |
| Sports Turf Consultants UK Limited | Arts & recreation | 2003 |
| Spring Agriculture Ltd | Professional & scientific | 2023 |
| Springfield Consultancy Services Limited | Professional & scientific | 2023 |
| Springvale Close Freehold Limited | Households | 2006 |
| Spruce Investments Limited | Real estate | 1997 |
| Square 1 Investments Limited | Real estate | 2009 |
| Squirrel Property and Investment Limited | Real estate | 2016 |
| SR Performance Services Limited | Other services | 2018 |
| SR145 Ltd | Real estate | 2021 |
| SR3 Retail Limited | Wholesale & retail | 2020 |
| SSA Paragon Limited | Professional & scientific | 2022 |
| Sskt London Road Limited | Real estate | 2019 |
| ST Charles Place (Weybridge) Residents Association Limited | Households | 1990 |
| ST George's Court (Weybridge) Management Company Limited | Households | 2004 |
| ST James Parade (110) Limited | Arts & recreation | 2008 |
| ST John's (Leatherhead) Enterprises Ltd | Administrative & support | 2008 |
| ST Margaret's Court (Dorking) Residents Association Limited | Real estate | 2007 |
| ST Mechanical Ltd | Construction | 2021 |
| ST Nicholas Hill Residents Association Limited | Households | 2012 |
| ST. Charles Court (Block 1) Management Company (Weybridge) Limited | Households | 1992 |
| ST. Charles Court (Block 2) Management Company (Weybridge) Limited | Households | 1992 |
| ST. Charles Court Estate Management Company (Weybridge) Limited | Households | 1992 |
| ST. Francis' Gardens Management Company Limited | Households | 1991 |
| ST. Pierre Properties Limited | Construction | 1991 |
| St.Mark's Court Residents Company Limited | Households | 1994 |
| Staffcare Limited | Extraterritorial | 2021 |
| Stagers Limited | Construction | 1981 |
| Stageselect Limited | Construction | 1987 |
| Standing Ovation Limited | Information & communication | 2016 |
| Starling Aerospace Limited | Manufacturing | 2001 |
| Starlings (Holtwood Road) Residents' Association Limited | Real estate | 1992 |
| Starview Learning Limited | Education | 2026 |
| Station Approach Holdings Limited | Administrative & support | 2021 |
| Station Road (Belmont) Management Company Limited | Households | 2003 |
| Steady Care Services Ltd | Health & social care | 2017 |
| Steady Properties and Estates Ltd | Real estate | 2024 |
| Steina Group Limited | Real estate | 2025 |
| Stellar Remuneration Limited | Administrative & support | 2013 |
| Stephen Green Lighting Limited | Arts & recreation | 2016 |
| Stephenson Wright Limited | Construction | 2013 |
| Stepware Limited | Arts & recreation | 1985 |
| Sterling Business Systems (Midlands) Limited | Other services | 1987 |
| Sterling Facilities Ltd | Administrative & support | 2026 |
| Steven Horvath & Associates Ltd | Administrative & support | 2012 |
| Stirling Harvey Homes Ltd | Real estate | 2024 |
| Stithian Limited | Professional & scientific | 2009 |
| Stoke Cobham Limited | Households | 2011 |
| Stone and Stem Ltd | Construction | 2025 |
| Stone Electrical Surrey Ltd | Construction | 2018 |
| Stoneleigh Court Residents Limited | Households | 2004 |
| Stonyrock Film Limited | Information & communication | 2023 |
| Stonyrock Limited | Professional & scientific | 2017 |
| Storm Accountancy Services Ltd | Professional & scientific | 2014 |
| Strategence Ltd | Information & communication | 2002 |
| Strategic Project Management Ltd | Professional & scientific | 2016 |
| Strategic Wealth Group Limited | Financial services | 2023 |
| Strategic Wealth Partners Limited | Financial services | 2017 |
| Stream Side Gardens Management Limited | Households | 2026 |
| Strength & Stem Flowers Limited | Wholesale & retail | 2022 |
| Strideout Experience Ltd | Other services | 2022 |
| Strike Architects Ltd | Professional & scientific | 2004 |
| Strive to Thrive Limited | Extraterritorial | 2018 |
| Strong Willed Investments LLP | | 2011 |
| Stuart Hurst Property Limited | Administrative & support | 2010 |
| Stuart Valentine Limited | Professional & scientific | 2016 |
| Studio Law Limited | Professional & scientific | 2026 |
| Stylish & House Ltd | Construction | 2022 |
| Suddies Domestic Appliances Ltd | Wholesale & retail | 2016 |
| Sudo Catering Ltd | Hospitality | 2025 |
| Suki Buchanan Interiors Limited | Professional & scientific | 2024 |
| Sullivan Window Cleaning Ltd | Administrative & support | 2014 |
| Summation Access Ltd | Professional & scientific | 2026 |
| Summer Bidco Limited | Financial services | 2022 |
| Summer Midco Limited | Financial services | 2022 |
| Summer Topco Limited | Financial services | 2022 |
| Sumner Close Residents Association (Fetcham) Limited | Other services | 1991 |
| Sunswap Ltd | Manufacturing | 2020 |
| Superbooths Europe Ltd | Arts & recreation | 2014 |
| Supply Chain Analytics Ltd | Professional & scientific | 2023 |
| Sure Ideas New Interests Ltd | Real estate | 2021 |
| Surex Surfacing Ltd | Construction | 2021 |
| Surgentix Ltd | Health & social care | 2026 |
| Surreal FX Ltd. | Information & communication | 2020 |
| Surrey Accident Repair Centre Ltd | Wholesale & retail | 2025 |
| Surrey Asbestos Surveys and Removals Ltd | Water & waste | 2020 |
| Surrey Bespoke Construction Holdings Ltd | Financial services | 2024 |
| Surrey Bespoke Construction Ltd | Construction | 2019 |
| Surrey Climate Commission CIC | Professional & scientific | 2022 |
| Surrey Community Development Limited | Hospitality | 2009 |
| Surrey Contracting Limited | Construction | 2024 |
| Surrey Corporate Cars Ltd | Transport & logistics | 2023 |