| Sourcepower Ltd | Professional & scientific | 2024 |
| South Coast Vision Ltd | Health & social care | 2020 |
| South East Seed Fund | | 2007 |
| South Eastern Mechanical Services Limited | Construction | 2004 |
| South Star Inclusion Services Ltd | Education | 2026 |
| South Yorkshire Tyres Ltd | Wholesale & retail | 2025 |
| Southby Associates Ltd | Professional & scientific | 2016 |
| Southwood Place Management Company Limited | Real estate | 1981 |
| Sovereign Fields (Bracknell H8) Management Company Limited | Households | 2009 |
| Sovereign Fields (Bracknell H9) Management Company Limited | Households | 2010 |
| Sovereign Fields (Bracknell) Management Company Limited | Households | 2007 |
| Special Needs Jungle Ltd | Information & communication | 2014 |
| Specialist Lawn and Sports Ltd | Administrative & support | 2015 |
| Specific AV & Data Ltd | Construction | 2012 |
| Specific Interiors Limited | Professional & scientific | 2011 |
| Spectech Limited | Information & communication | 1990 |
| Specter Studios Limited | Information & communication | 2022 |
| Spice Merchant PH Ltd | Hospitality | 2020 |
| Spinney Road Freehold Limited | Hospitality | 2015 |
| Spirit (Camberley) Management Company Limited | Households | 2004 |
| Sports Results 365 Limited | Arts & recreation | 2022 |
| Springmark Consultants Limited | Information & communication | 1997 |
| SR Services South Ltd | Construction | 2026 |
| SRC Vision Consulting Ltd | Professional & scientific | 2026 |
| SSB Capital Limited | Financial services | 2017 |
| Ssradio Limited | Information & communication | 2006 |
| ST Edmunds Court Management Limited | Households | 2007 |
| ST Michaels Close (Fleet) Limited | Households | 2024 |
| ST. Johns Court Fleet (Management) Company Limited | Households | 1994 |
| ST. Margaret's Book Keeping Services Limited | Professional & scientific | 2003 |
| ST. Nicholas' School (Fleet) Educational Trust Limited | Education | 1966 |
| Stackdrift Consulting Limited | Information & communication | 2025 |
| Stafford Tailoring Limited | Wholesale & retail | 2009 |
| Stanley Property Management Ltd | Real estate | 2015 |
| Stanton Lodge (Fleet) Residents Association Limited | Households | 1968 |
| Star Prodigy Software Solutions Ltd | Information & communication | 2026 |
| Starry Nights Baby Sleep Limited | Other services | 2020 |
| Start and Drive Ltd | Wholesale & retail | 2010 |
| Stay on Route Ltd | Information & communication | 2018 |
| STEAM2CLEAN Ltd. | Administrative & support | 2017 |
| Steerpike UK Limited | Professional & scientific | 1994 |
| Stele Communications Limited | Professional & scientific | 2017 |
| Stephen Webbstar Limited | Construction | 2016 |
| Steriozone Ltd | Transport & logistics | 2020 |
| Sterling Executive Recruitment Limited | Professional & scientific | 2014 |
| Steve Alman Counselling Services Limited | Extraterritorial | 2023 |
| Steven Lawrence Plumbing Services Limited | Administrative & support | 2004 |
| Stirling Associates Partners Limited | Administrative & support | 2015 |
| STK Stoves and Chimneys Limited | Administrative & support | 2026 |
| Stockton Park (Fleet) Management Limited | Households | 1986 |
| Stocktonia Limited | Real estate | 1966 |
| Stokes Consultancy Limited | Other services | 2023 |
| Stokes Property Investments Limited | Real estate | 2021 |
| Storehouse Asset Management Limited | Financial services | 2008 |
| Storehouse Group Limited | Other services | 2015 |
| Storehouse Wealth Management Limited | Financial services | 2015 |
| Streamvale Management Company Limited | Administrative & support | 1995 |
| Strm Motorsport Ltd | Arts & recreation | 2023 |
| STS (Southern Technical Services) Limited | Construction | 2017 |
| STS Properties Management Ltd | Real estate | 2013 |
| Studio HQ Limited | Professional & scientific | 2008 |
| Studio PAR Limited | Arts & recreation | 2026 |
| Studiocraft (UK) Ltd | Information & communication | 2010 |
| Sublinked Limited | Administrative & support | 2025 |
| SUE LOW Design Limited | Professional & scientific | 2018 |
| Sugarplum Trading Limited | Wholesale & retail | 2010 |
| Sunique Photography Ltd | Professional & scientific | 2024 |
| Sunny Clean Ltd | Administrative & support | 2023 |
| Sunpeople Ltd | Professional & scientific | 2006 |
| Sunrise Packaging Ltd | Extraterritorial | 2022 |
| Sunrise Supplies UK Limited | Wholesale & retail | 2018 |
| Superstring Ltd. | Information & communication | 2017 |
| Suppress IT Limited | Construction | 2015 |
| Supreme Marketing Fleet Ltd | Wholesale & retail | 2023 |
| Sureguard UK P&E Limited | Administrative & support | 2026 |
| Surfing Slicks Ltd. | Manufacturing | 2021 |
| Surin Consulting Limited | Professional & scientific | 2025 |
| Surrey First AID Training Limited | Education | 2007 |
| Surrey Garden Rooms and LOG Cabins Ltd | Administrative & support | 2024 |
| Surrey Heath Archaeological and Heritage Trust | Other services | 1988 |
| Surrey Hills Rhythmic Gymnastics Ltd | Education | 2023 |
| Surrey Shutters Ltd | Wholesale & retail | 2006 |
| Surrey Topsoils Ltd | Construction | 2007 |
| Surv Spectrum Surveying and Consultancy Ltd | Professional & scientific | 2024 |
| Survivor Products Limited | Wholesale & retail | 2026 |
| Sussex Surfski Ltd | Arts & recreation | 2022 |
| Sustainable Communications Ltd | Professional & scientific | 2012 |
| Suzieu Ltd | Real estate | 2020 |
| Svsj Services Ltd | Professional & scientific | 2025 |
| Swale Property Group Limited | Real estate | 2017 |
| Swan Court (Blackwater) RTM Company Limited | Households | 2009 |
| Swif - Debt Area a LP | | 2023 |
| Swif - Equity Area a LP | | 2023 |
| Sycomm Voice & Data Ltd | Information & communication | 1997 |
| Synevent Consulting Limited | Professional & scientific | 2023 |
| Syntasso Limited | Information & communication | 2021 |
| System Elegance Ltd. | Information & communication | 2015 |
| T Garrod Heating Limited | Construction | 2022 |
| T J Waves Limited | Other services | 2008 |
| T Winst Company Limited | Real estate | 2022 |