| Sundridge Solutions Ltd | Professional & scientific | 2018 |
| Sungardsolutions Ltd | Professional & scientific | 2025 |
| Sunland Industry Ltd | Extraterritorial | 2021 |
| Sunlight Removals Limited | Transport & logistics | 2015 |
| Sunny Day Dockland (UK) Limited | Extraterritorial | 2012 |
| Sunny Day Dockland Limited | Manufacturing | 2012 |
| Sunny Days Chippy Ltd. | Hospitality | 2023 |
| Sunny Tutors Ltd | Education | 2020 |
| Sunny Ventures Export Ltd | Other services | 2016 |
| Sunnyfield Limited | Construction | 2020 |
| Sunnymuch Drylining Ltd | Construction | 2023 |
| Sunnypack International Group Co., Ltd. | Extraterritorial | 2014 |
| Sunova Power Co., Ltd | Extraterritorial | 2013 |
| Sunrice Ltd | Information & communication | 2024 |
| Sunrise Stockroom Limited | Wholesale & retail | 2026 |
| Sunshine Project 03 Limited | Construction | 2021 |
| Sunshine Project 04 Limited | Construction | 2021 |
| Sunshine Project 05 Limited | Construction | 2021 |
| Sunshine Project 06 Limited | Financial services | 2021 |
| Sunshine Project 07 Limited | Financial services | 2021 |
| Sunshine Project 08 Limited | Financial services | 2021 |
| Sunshine Project 10 Limited | Construction | 2024 |
| Sunshinegun UK Ltd | Professional & scientific | 2016 |
| Sunstone Property Group Ltd | Real estate | 2016 |
| Sunturk Ltd | Extraterritorial | 2025 |
| Supakomputer Ltd | Information & communication | 2009 |
| Super 7 Group Ltd | Information & communication | 2020 |
| Superclean Properties Ltd | Real estate | 2018 |
| Superior Access Scaffolding Limited | Construction | 2012 |
| Superior Builds Construction Ltd | Construction | 2025 |
| Superior Homework Limited | Construction | 2023 |
| Superkids Club Limited | Health & social care | 2012 |
| Supplied by Craig Limited | Wholesale & retail | 2025 |
| Supply Chain Resources Ltd | Professional & scientific | 2007 |
| Supporting Independence Limited | Health & social care | 2005 |
| Surecare Bromley Limited | Administrative & support | 2016 |
| Suregold Limited | Administrative & support | 2007 |
| Suremax Corporation Limited | Professional & scientific | 2020 |
| Surena Limited | Information & communication | 2011 |
| Surescan Ltd | Professional & scientific | 2018 |
| Surestone Properties Limited | Real estate | 2012 |
| Surety House RTM Company Limited | Households | 2018 |
| Surface Repair Solutions Limited | Construction | 2022 |
| Surgeet Enterprises Limited | Health & social care | 2022 |
| Surmen Ltd | Construction | 2019 |
| Surrey and Sussex Anaesthetists LLP | | 2010 |
| Surrey Home Build Ltd | Construction | 2023 |
| Surrey House (Rotherhithe) Management Limited | Households | 1990 |
| Surrey Removals Services Ltd | Transport & logistics | 2025 |
| Sushi Time Ltd | Hospitality | 2021 |
| Sussex Surgeon Limited | Health & social care | 2017 |
| Sutherland House Freehold Limited | Real estate | 2014 |
| Suzy Barrett Wigs Ltd | Manufacturing | 2025 |
| SV Prestige Hire Limited | Administrative & support | 2023 |
| SV Realty Ltd | Real estate | 2025 |
| Svln Ltd | Extraterritorial | 2024 |
| Svotrd Ltd | Hospitality | 2026 |
| Svpd Ltd | Real estate | 2026 |
| SVS Digital Limited | Professional & scientific | 2015 |
| SW19 Snacks Limited | Wholesale & retail | 2022 |
| SW3 Electrical Ltd | Construction | 2020 |
| Swaavi Technologies Ltd | Information & communication | 2019 |
| Swan Industrial Estate Management Limited | Real estate | 1999 |
| Swan Rose Holdings Ltd | Real estate | 2021 |
| Swancote Holdings Limited | Real estate | 1994 |
| Swanley Sushi Ltd | Hospitality | 2024 |
| Swayfields (Rugby) Limited | Real estate | 1996 |
| SWD Lining Limited | Water & waste | 2022 |
| Sweet Care Ltd | Health & social care | 2020 |
| Sweet Homes Sweet Ltd | Wholesale & retail | 2008 |
| Sweet Jerk Ltd | Hospitality | 2023 |
| Sweet Savour Assembly | Other services | 2008 |
| Sweet Ventures Limited | Wholesale & retail | 1989 |
| Sweetdoh Limited | Information & communication | 2013 |
| Swep Tech Limited | Water & waste | 2025 |
| Swevenings Properties Limited | Real estate | 2023 |
| Swift Roofcare Ltd | Construction | 2025 |
| Swift Squared Limited | Real estate | 2025 |
| Swiftmile Couriers Ltd | Transport & logistics | 2025 |
| Swiftsure Ceilings Limited | Construction | 2002 |
| Swiftsure Interior Solutions Ltd | Construction | 2017 |
| Swingate Inn Limited | Hospitality | 2008 |
| Swingglo Ltd | Administrative & support | 2026 |
| Swipe Records Limited | Manufacturing | 2008 |
| Swiss Watches Worldwide Limited | Administrative & support | 2018 |
| Switch OS Ltd | Information & communication | 2021 |
| Switch Recruit Limited | Administrative & support | 2017 |
| Switchgear Technology Limited | Manufacturing | 2004 |
| SWL Leisure Limited | Arts & recreation | 2018 |
| SX Health Ltd | Health & social care | 2014 |
| SY Medical Ltd | Health & social care | 2011 |
| Syby Labs Ltd | Professional & scientific | 2020 |
| Sycamore House (Collective Enfranchisement) Limited | Real estate | 2006 |
| Sycamore Place (Bromley) Management Co Ltd | Households | 2007 |
| Sydmons Court Residents Association Limited | Households | 2007 |
| Sylhet One EAT Ltd | Hospitality | 2025 |
| Symbox Limited | Information & communication | 2001 |
| Symmetria Contractors Ltd | Construction | 2022 |
| Symons Management Services Ltd | Households | 2021 |
| Synapri Limited | Administrative & support | 2018 |