| Sutton Borough Citizens Advice Bureaux | Health & social care | 1996 |
| Sutton Brook Wealth Management Ltd | Financial services | 2014 |
| Sutton Eagles Special Needs Football Club Ltd | Arts & recreation | 2010 |
| Sutton Music Trust | Education | 2023 |
| Sutton Night Watch Homeless | Health & social care | 2017 |
| Sutton Opportunity Pre-School | Education | 2006 |
| Svensson Jewellers Limited | Wholesale & retail | 2010 |
| SW Homes and Properties Ltd | Real estate | 2024 |
| SW Junior Care Limited | Health & social care | 2024 |
| SW London Residential Ltd | Real estate | 2015 |
| SW UK Consultancy Ltd | Professional & scientific | 2024 |
| Swadhas Ltd | Wholesale & retail | 2021 |
| Swathi Info Systems Limited | Information & communication | 2015 |
| SWC Cleaning Services Ltd | Administrative & support | 2021 |
| SWD Trading Limited | Extraterritorial | 2022 |
| Swift Apps Ltd | Information & communication | 2014 |
| Swift House Management (Sutton) Limited | Households | 1988 |
| Swipebuy Ltd | Wholesale & retail | 2023 |
| Swiss Francs Limited | Wholesale & retail | 2026 |
| Syed M ALI Limited | Professional & scientific | 2026 |
| Sylkyni Limited | Manufacturing | 2025 |
| Symphony Associates Limited | Wholesale & retail | 2012 |
| Symphony Rose Ceremonies Ltd | Other services | 2026 |
| Symtrade Limited | Real estate | 2013 |
| Syntech Euro Limited | Professional & scientific | 2014 |
| Szobak Properties Ltd | Real estate | 2024 |
| T & K Accounting Group Ltd | Professional & scientific | 2007 |
| T H S Electrical Ltd | Construction | 2018 |
| T M Leisure Limited | Administrative & support | 2013 |
| T-Mac Technologies Limited | Administrative & support | 2019 |
| T3 Building Limited | Construction | 2010 |
| Taksim Kebab House Ltd | Hospitality | 2019 |
| Talking Drum Enterprises Ltd | Professional & scientific | 2011 |
| Tall Horse Consultancy Services Limited | Professional & scientific | 2018 |
| Tamheed UK Limited | Wholesale & retail | 2013 |
| Taut News Ltd | Wholesale & retail | 2010 |
| Taut Properties Limited | Financial services | 2020 |
| Tax Return Accountants Limited | Professional & scientific | 2010 |
| Taxspring Limited | | 1977 |
| Taylor & Quin Ltd | Construction | 2007 |
| Taylormade Facilities Management Limited | Construction | 2022 |
| TBE Restaurant Ltd | Administrative & support | 2018 |
| Tcdo Ltd | Professional & scientific | 2013 |
| TCE Events Ltd | Other services | 2015 |
| TDC Consultants Ltd | Administrative & support | 2019 |
| TDG Services Limited | Administrative & support | 2020 |
| TDZ Enterprise Limited | Health & social care | 2014 |
| TEC4TEKKERS Ltd | Financial services | 2024 |
| Tech Revice Ltd | Wholesale & retail | 2021 |
| Tech Seller UK Ltd | Wholesale & retail | 2017 |
| Techbay Digital Solutions Ltd | Wholesale & retail | 2025 |
| Techlawuk Ltd | Professional & scientific | 2023 |
| Technimove Recycles Limited | Information & communication | 2011 |
| Techport Global Service Ltd | Professional & scientific | 2019 |
| Techscaler Ltd | Professional & scientific | 2024 |
| Tecnologika Limited | Wholesale & retail | 2009 |
| Tecnovate Ltd | Information & communication | 2026 |
| TED Driving School Ltd | Education | 2023 |
| Tedamode Limited | Real estate | 2022 |
| Tejas Villa Ltd | Real estate | 2021 |
| TEMPLA2 Limited | Financial services | 2024 |
| Terrific Teeth Ltd | Health & social care | 2016 |
| Thackeray Freehold Limited | Households | 1991 |
| Thackeray Manor Management Limited | Households | 1973 |
| Thames School of Applied Skills Ltd | Education | 2023 |
| Thanassis Krikis Photography Ltd | Professional & scientific | 2014 |
| Thas Wholesale Limited | Wholesale & retail | 2025 |
| Thawana Ltd | Real estate | 2022 |
| THE Actors Class Limited | Education | 2015 |
| THE Actors House Ltd | Real estate | 2025 |
| THE Adenium Group Limited | Professional & scientific | 2006 |
| THE Barn Beddington Management Company Limited | Households | 2003 |
| THE Barut Consultancy Ltd | Professional & scientific | 2011 |
| THE Beauty Gallery London Ltd | Other services | 2018 |
| THE Bespoke Saddle Company Limited | Manufacturing | 2006 |
| THE Change Foundation | Health & social care | 1995 |
| THE Chestnut Collective Ltd | Wholesale & retail | 2024 |
| THE Chilterns (Sutton) Freehold Company Limited | Real estate | 2011 |
| THE Clearance Squad Ltd | Transport & logistics | 2020 |
| THE Coffee Club Sutton Ltd | Hospitality | 2021 |
| THE Community Well Ltd | Health & social care | 2013 |
| THE Complete Angling Directory Ltd | Information & communication | 2025 |
| THE Croft Equestrian Centre Limited | Other services | 2015 |
| THE Curated LAB Ltd | Information & communication | 2026 |
| THE CUT & Crease Co Ltd | Manufacturing | 2024 |
| THE Cutting Point Limited | Other services | 2023 |
| THE Dosanjh Foundation Limited | Education | 2018 |
| THE Drain Guys Ltd | Water & waste | 2015 |
| THE Drain Guys UK Ltd | Water & waste | 2022 |
| THE Edward Wilson Trading Company Limited | Administrative & support | 2020 |
| THE Electrician (London) Ltd | Construction | 2026 |
| THE Federation of Bangladeshi Caterers (UK) | Other services | 2008 |
| THE Flutter Lounge Ltd | Other services | 2016 |
| THE Formative Years Group Limited | Construction | 1990 |
| THE Garden Balcony Company Limited | Administrative & support | 2011 |
| THE Gatsby Band Limited | Arts & recreation | 2017 |
| THE Gluten Free Bread Company Limited | Hospitality | 2012 |
| THE Gluten Free Cake Company Limited | Hospitality | 2012 |
| THE Greek Vine Limited | Hospitality | 2015 |
| THE H&R Club Limited | Hospitality | 2025 |