| Sport Support Group CIC | Administrative & support | 2025 |
| Sportbuddy.Io Ltd | Information & communication | 2016 |
| Sportfolio Apparel LP | | 2020 |
| Sportfolio Europe Limited Partnership | | 2012 |
| Sportfolio Trading Limited | Wholesale & retail | 2010 |
| Sportlight Technology Ltd | Professional & scientific | 2015 |
| Sports AID Eastern | Arts & recreation | 1998 |
| Sports Coach Network Ltd | Education | 2026 |
| Sports Development Resources Limited | Professional & scientific | 2009 |
| Sports Information Services (Holdings) Limited | Information & communication | 1985 |
| Sports Information Services Group Limited | Financial services | 2021 |
| Sports Information Services Limited | Information & communication | 2001 |
| Sports Leaders UK Limited | Education | 2005 |
| Sports Pitch Construction Ltd | Extraterritorial | 2009 |
| Sports Stadia Art Ltd | Wholesale & retail | 2012 |
| Sportshubmg Ltd | Other services | 2023 |
| Sportsi Ltd | Information & communication | 2020 |
| Sporty Scholars Activities & Swimming Limited | Arts & recreation | 2022 |
| Sporty Scholars Limited | Other services | 2021 |
| Sporty Scholars Management Limited | Other services | 2021 |
| Spotless Garments Ltd | Administrative & support | 2018 |
| Spotless Window Cleaning Services Ltd | Administrative & support | 2017 |
| Spotlite Services Limited | Health & social care | 2018 |
| Spott IT Ltd | Construction | 2021 |
| Spotze Ltd | Information & communication | 2026 |
| Sppirx Japan Limited | Information & communication | 2012 |
| Spray Global Limited | Manufacturing | 2021 |
| Spraylakes Consultancy Ltd | Professional & scientific | 2013 |
| Spring Fold Management Limited | Households | 2023 |
| Spring Hospitality Services Ltd | Wholesale & retail | 2022 |
| Spring Info-Tech Ltd | Information & communication | 2018 |
| Spring Infosys Limited | Information & communication | 2011 |
| Spring Infosystems Ltd | Information & communication | 2014 |
| Spring Management Consultancy Ltd | Professional & scientific | 2018 |
| Spring Reality Ltd | Construction | 2022 |
| Spring Recruitment Solutions Ltd | Administrative & support | 2022 |
| Spring Resources (UK) Ltd | Professional & scientific | 2009 |
| Spring Stoves Ltd | Construction | 2016 |
| Spring Technology Ltd | Real estate | 2012 |
| Springbirch Limited | Other services | 2019 |
| Springdog Limited | Hospitality | 2014 |
| Springfield IT Ltd | Transport & logistics | 2026 |
| Springlake Limited | Information & communication | 2015 |
| Springs Consultancy Ltd. | Administrative & support | 2014 |
| Springs of Life-Giving Water Ministries Ltd | Other services | 2011 |
| Sprinkle of Glitter Limited | Information & communication | 2014 |
| Sprinks Construction Limited | Construction | 1974 |
| Sprint Transport Ltd | Transport & logistics | 2021 |
| Sprintshift Commercial Vehicle Hire Ltd | Transport & logistics | 2002 |
| Spro Consulting Ltd | Professional & scientific | 2017 |
| SPV Reality Ltd | Real estate | 2018 |
| Spx.Opt Limited | Wholesale & retail | 2000 |
| SQ Building Solutions Ltd | Construction | 2023 |
| SQ Motor Services Ltd | Wholesale & retail | 2018 |
| SQ Nine Ltd | Wholesale & retail | 2026 |
| SQ Technologies Ltd | Wholesale & retail | 2018 |
| SQ-M2 Limited | Construction | 2002 |
| Sqltrix Data Solutions Ltd | Information & communication | 2021 |
| Sqpr Ltd | Real estate | 2014 |
| Squad Dancewear Limited | Manufacturing | 2016 |
| Square 2 Learning Ltd. | Education | 2008 |
| Square Acre Limited | Wholesale & retail | 2022 |
| Square Boxes Limited | Real estate | 2019 |
| Square Foot Consulting Limited | Professional & scientific | 1996 |
| Square Tree Limited | Real estate | 2018 |
| Squarewheels on Location Limited | Transport & logistics | 2003 |
| Squid INK Cartridges and Consumables Limited | Wholesale & retail | 2025 |
| Squidge Media Ltd | Wholesale & retail | 2020 |
| Squires Court (Wimbledon) Management Limited | Other services | 1993 |
| Squires MK Ltd | Other services | 2019 |
| Sqwoo Production Company Ltd | Arts & recreation | 2015 |
| SR Capital Management Ltd | Administrative & support | 2016 |
| SR Cleaning Solutions Ltd | Administrative & support | 2017 |
| SR Collectibles Import and Export Ltd | Wholesale & retail | 2021 |
| SR Global Clinical Limited | Information & communication | 2016 |
| SR Health Carers Ltd | Health & social care | 2023 |
| SR Info Qube Ltd | Information & communication | 2010 |
| SR Let's Limited | Real estate | 2023 |
| SR Medical Services Ltd | Health & social care | 2015 |
| SR Soft Consultancy Services Ltd | Information & communication | 2026 |
| SR Software Solutions Limited | Information & communication | 2012 |
| SR SSP Limited | Financial services | 2015 |
| SR Thermal Services Ltd | Construction | 2018 |
| SR Transportation Limited | Transport & logistics | 2024 |
| Sraaj Ltd | Real estate | 2024 |
| Srama IT Services Limited | Information & communication | 2014 |
| Srayz Driving School Ltd | Education | 2026 |
| Srbe Investments Limited | Financial services | 2016 |
| Sree Daksh Ltd | Information & communication | 2016 |
| Sree Home Properties Ltd | Real estate | 2025 |
| Sreeram Consulting Solutions Ltd | Information & communication | 2022 |
| SRF Group Limited | Real estate | 2021 |
| SRH Medical Practice Ltd | Health & social care | 2024 |
| SRH PVT Ltd | Real estate | 2021 |
| Srhh Limited | Transport & logistics | 2021 |
| SRI & Co Development Ltd | Transport & logistics | 2024 |
| SRI Dhaatrish Investments Limited | Real estate | 2019 |
| SRI Gowry Ltd | Professional & scientific | 2026 |
| SRI Health Limited | Health & social care | 2014 |
| SRI Infotech Limited | Information & communication | 2019 |