| Surrey Marble & Granite (Installations) Limited | Wholesale & retail | 2002 |
| Surrey Marble and Granite Company Limited | Manufacturing | 2000 |
| Surrey Pallitz Limited | Administrative & support | 2005 |
| Surrey Taverns Limited | Real estate | 1978 |
| Surrey Tuning Services Ltd | Professional & scientific | 2024 |
| Susana & Daughters Ltd | Manufacturing | 2018 |
| Susie Kendon Ltd | Professional & scientific | 2025 |
| Sussex and Surrey Central Heating Services Ltd | Construction | 2020 |
| Sussex and Surrey Chiropractic Limited | Health & social care | 2022 |
| Sussex and Surrey Leaded Lights Ltd | Manufacturing | 2025 |
| Sussex Automotive Ltd | Wholesale & retail | 2018 |
| Sussex Baseball Softball Limited | Arts & recreation | 2013 |
| Sussex Beach Retreats Ltd | Hospitality | 2025 |
| Sussex Bully’S Limited Ltd | Agriculture & fishing | 2021 |
| Sussex Campervans Ltd | Manufacturing | 2012 |
| Sussex Capital Holdings Limited | Real estate | 2020 |
| Sussex Capital Property Limited | Real estate | 2026 |
| Sussex Car Storage Limited | Agriculture & fishing | 2010 |
| Sussex Conservation Consortium Ltd | Arts & recreation | 2013 |
| Sussex Easy Pick Ltd | Transport & logistics | 2025 |
| Sussex Educare Limited | Health & social care | 2011 |
| Sussex Electric Gates Ltd | Construction | 2019 |
| Sussex Energy Consultants Ltd | Administrative & support | 2026 |
| Sussex Energy Ltd | Construction | 2023 |
| Sussex Event Bars Ltd | Hospitality | 2018 |
| Sussex Exclusive Limited | Information & communication | 2020 |
| Sussex First AID Courses Limited | Education | 2017 |
| Sussex Health Care Audiology Limited | Health & social care | 2011 |
| Sussex Hypnotherapy Clinics Limited | Health & social care | 2024 |
| Sussex Iron Ltd | Manufacturing | 2022 |
| Sussex Marketing Strategies Limited | Professional & scientific | 2019 |
| Sussex Martlets Cricket Club Limited | Arts & recreation | 2017 |
| Sussex Motor Car Storage Ltd | Wholesale & retail | 2010 |
| Sussex MR2 Ltd | Wholesale & retail | 2017 |
| Sussex Natural Aesthetics Ltd | Other services | 2019 |
| Sussex Offshore Fishing Charters Ltd | Agriculture & fishing | 2008 |
| Sussex Property Surveys Limited | Professional & scientific | 2021 |
| Sussex PUB Co Ltd | Hospitality | 2020 |
| Sussex Solar Group Ltd | Financial services | 2024 |
| Sussex Solar Limited | Construction | 2005 |
| Sussex Sport Horses Limited | Agriculture & fishing | 2020 |
| Sussex Swim Specialists Limited | Education | 2026 |
| Sussex Taverns Ltd | Hospitality | 2023 |
| Sussex Van Windows Ltd | Manufacturing | 2024 |
| Sussexsurrey Doors and Windows Limited | Construction | 2012 |
| Sustain Change Ltd | Professional & scientific | 2022 |
| Sustainable Footprints Limited | Professional & scientific | 2009 |
| Sutlieff Tree Services Limited | Administrative & support | 2014 |
| Sutton Drinks UK Ltd | Hospitality | 2026 |
| Sutton FPG Ltd | Financial services | 2014 |
| Svoller Technical Services Ltd | Professional & scientific | 2024 |
| SW Media Limited | Administrative & support | 2018 |
| SW Project Systems Ltd | Construction | 2026 |
| Swallows Gate (Management Company) Limited | Households | 2023 |
| Swallows Lane (Dial Post) Residents Company Limited | Other services | 2000 |
| Swallowtail Capital Limited | Professional & scientific | 2008 |
| Swaymar Marine Engineering Limited | Manufacturing | 2013 |
| Sweecyn Properties Ltd | Real estate | 2026 |
| Sweet Pickle Co. Limited | Wholesale & retail | 2025 |
| Swift Stop Limited | Wholesale & retail | 2026 |
| Swift Tuttle Limited | Real estate | 1991 |
| Swiftbio Consulting Ltd | Professional & scientific | 2021 |
| Swisstal Services Ltd | Professional & scientific | 2021 |
| Sykes & East Limited | Professional & scientific | 1990 |
| Sylvan Design Ltd | Manufacturing | 2014 |
| Symmetriq Technologies Ltd | Information & communication | 2024 |
| Symmetry Home Solutions Ltd | Construction | 2024 |
| Syncrolec Electrical Solutions Ltd | Construction | 2026 |
| Synergy Extra Ltd | Professional & scientific | 2025 |
| Synergy TJ Ltd | Professional & scientific | 2016 |
| Synten UK Ltd | Information & communication | 2025 |
| System Reset Limited | Manufacturing | 2019 |
| Sytech Systems Ltd | Information & communication | 2021 |
| T & M Plant Hire (EOT) Limited | Financial services | 2025 |
| T Dawes & SON Ltd | Construction | 2009 |
| T H-R Advisory Ltd | Professional & scientific | 2026 |
| T&A Group Holdings Limited | Financial services | 2020 |
| T.E.D UK Property Investments Ltd | Real estate | 2025 |
| Taaffe Consulting Limited | Information & communication | 2017 |
| Table Tennis 365 Events Ltd | Arts & recreation | 2024 |
| Table Tennis 365 Limited | Wholesale & retail | 2010 |
| Tactic Connect Ltd | Arts & recreation | 2018 |
| Tactic Holdings Limited | Financial services | 2020 |
| Tactic Hub Limited | Information & communication | 1999 |
| Tadghit Transformation Ltd | Information & communication | 2021 |
| Tagg & Connell Ltd | Hospitality | 2011 |
| Tahi Engineering Limited | Construction | 1997 |
| Tailor Made Technologies Limited | Information & communication | 2000 |
| Tailwind Project Solutions Limited | Professional & scientific | 2014 |
| Tait Asset Management Ltd | Real estate | 2023 |
| Take One PPA Media Ltd | Information & communication | 1998 |
| Take One Productions U.K. Ltd | Information & communication | 2023 |
| Taking the Lead Solutions Limited | Administrative & support | 2012 |
| Talent Retention Group Limited | Professional & scientific | 2008 |
| Talent Rocket Ltd | Administrative & support | 2021 |
| Talk Potential Limited | Education | 2014 |
| Talking Finances Ltd. | Financial services | 2013 |
| Tan-A-Na Limited | Hospitality | 2012 |
| Tanbridge House Apartments Limited | Households | 2017 |
| Tanfield Court Tenants Association (Horsham) Limited | Administrative & support | 1959 |