| Sturry Road HCW Ltd | Other services | 2019 |
| Sturry Tyres Limited | Wholesale & retail | 2022 |
| Styles Aviation UK Ltd | Transport & logistics | 2021 |
| SU Jain Properties Ltd | Real estate | 2023 |
| Sublime Carpentry, Construction and Design Ltd | Manufacturing | 2024 |
| Successionkeeper Ltd | Information & communication | 2025 |
| Sudbury Mews Management Co. Ltd | Real estate | 2017 |
| Sullivan and Solak Ltd | Education | 2024 |
| Sumar Limited | Health & social care | 2013 |
| Summer Court Management Company Limited(The) | Households | 1978 |
| Summers Mechanical Ltd | Construction | 2020 |
| Summit Investments Limited | Administrative & support | 1998 |
| Sumo Donuts FK Limited | Hospitality | 2025 |
| Sumo Donuts Limited | Hospitality | 2022 |
| Sumo Donuts MST Limited | Wholesale & retail | 2025 |
| Sumo Donuts TL Limited | Hospitality | 2024 |
| Sun LEE HON Ltd | Wholesale & retail | 2021 |
| Sun MGA Ltd | Professional & scientific | 2023 |
| Sunley Farms Limited | Agriculture & fishing | 1983 |
| Sunningdale House Developments (ST Nicolas) Limited | Real estate | 2019 |
| Sunningdale House Developments (Baxter Farm) Limited | Real estate | 2020 |
| Sunningdale House Developments (Baxter Farm) Management Limited | Households | 2020 |
| Sunningdale House Developments (Dover Road Walmer) Limited | Real estate | 2018 |
| Sunningdale House Developments (Minster) Limited | Real estate | 2019 |
| Sunningdale House Developments (Minster) Management Limited | Households | 2020 |
| Sunningdale House Developments (ST Nicolas) Management Limited | Households | 2020 |
| Sunny Day Cleaning Limited | Administrative & support | 2020 |
| Sunnyford Management Company Ltd | Other services | 1999 |
| Sunnymead Court Ltd | Real estate | 2020 |
| Superavit Fiduciary Agent Ltd | Administrative & support | 2017 |
| Superfly Soap Limited | Manufacturing | 2022 |
| Supermodified Events & Marketing Ltd | Administrative & support | 2024 |
| Superstore Vintage Ltd | Wholesale & retail | 2018 |
| Supreme Smart Repair Ltd | Wholesale & retail | 2025 |
| Suretrak (S.E.) Ltd | Administrative & support | 2009 |
| Surf Project Delivery Limited | Information & communication | 2013 |
| Surinder Bhatti Dental Services Limited | Health & social care | 2023 |
| Surmount Engineering and Facilities Ltd | Administrative & support | 2017 |
| Survey Wisdom Limited | Information & communication | 2004 |
| Susannah Townsend Limited | Education | 2019 |
| Sustainability Monitor Limited | Information & communication | 2017 |
| Sustainable Safety Limited | Professional & scientific | 2016 |
| Sutton Sheds Limited | Manufacturing | 2026 |
| Suva Consulting Ltd | Construction | 2025 |
| Svas Immovables Limited | Financial services | 2022 |
| Svolta Services Ltd | Information & communication | 2017 |
| SVP Coaching Limited | Administrative & support | 2025 |
| Swain Consulting Limited | Professional & scientific | 2015 |
| Swale Tutoring Service Ltd | Education | 2023 |
| Swanfield Developments Limited | Construction | 2012 |
| Sweech Farm Management Company (South) Ltd | Households | 2022 |
| Sweet Spree Ltd | Manufacturing | 2023 |
| Swift Storage Solutions Ltd. | Administrative & support | 2013 |
| Swiss Systems Limited | Information & communication | 2020 |
| Swittle Ltd | Real estate | 2023 |
| SWL Education Ltd | Education | 2026 |
| SWN Y DON Ltd | Administrative & support | 2017 |
| Synaptic Films Ltd | Information & communication | 2012 |
| Sync B2B Ltd | Professional & scientific | 2025 |
| Synergy Asset Services Limited | Water & waste | 2001 |
| Synergy Excel Group Limited | Financial services | 2024 |
| Synergy Fire & Security Ltd | Administrative & support | 2020 |
| Synergy Regulatory Support Ltd | Administrative & support | 2014 |
| Syntheis Ltd | Professional & scientific | 2025 |
| Systems IO Limited | Information & communication | 2019 |
| Systems Management Group Limited | Financial services | 2023 |
| T and K Food Mart Ltd | Wholesale & retail | 2022 |
| T F Wheatley Ltd | Wholesale & retail | 2025 |
| T G C a Limited | Other services | 2010 |
| T G Corporate Limited | Administrative & support | 2002 |
| T&J Brickwork Ltd | Manufacturing | 2026 |
| T.J. Skelton Limited | Professional & scientific | 2002 |
| T.N.B.M Ltd | Other services | 2025 |
| T.P.S. Consulting International Limited | Professional & scientific | 1994 |
| T2K Enterprise Limited | Wholesale & retail | 2023 |
| Tagsec Limited | Professional & scientific | 2010 |
| Tailwind Recruitment Ltd | Administrative & support | 2024 |
| Taipei Letting Ltd | Real estate | 2023 |
| Tait Group Ltd | Real estate | 2024 |
| Take One Tech Ltd | Information & communication | 2014 |
| Take UP Sport Ltd | Arts & recreation | 2022 |
| Takto Pet Furniture Ltd | Manufacturing | 2019 |
| Talarge Technologies Limited | Information & communication | 2025 |
| Talentum Consulting Ltd | Administrative & support | 2015 |
| Talfourd Properties Ltd | Real estate | 2025 |
| Talk Kent Limited | Information & communication | 2019 |
| Talking Heads Supervision Limited | Health & social care | 2021 |
| Talking Performance Limited | Professional & scientific | 2023 |
| Tallow TW Limited | Hospitality | 2013 |
| Talltree Developments Limited | Construction | 2022 |
| Talltree Utilities Limited | Construction | 2023 |
| Talmont Consultancy Ltd | Professional & scientific | 2024 |
| TAM Trading Limited | Construction | 2016 |
| TAN3DOC Ltd | Health & social care | 2013 |
| TAN3HOLDINGS Limited | Real estate | 2025 |
| Tandem Mediation Ltd | Professional & scientific | 2026 |
| Tangerine Property Ltd | Real estate | 2011 |
| Tankas-Adela Limited | Administrative & support | 2018 |
| Tankerton Grand Pavilion (1998) Limited | Households | 1998 |
| Tanya Winterburn Guardianship Limited | Extraterritorial | 2017 |