| Summitglow Limited | Manufacturing | 1983 |
| Summo Ltd | Wholesale & retail | 2025 |
| Sumner Contracting Ltd | Wholesale & retail | 2018 |
| Sumo Digital (Chili) Limited | Extraterritorial | 2018 |
| Sumo Digital (Genus) Limited | Information & communication | 2015 |
| Sumo Digital (Locus) Limited | Extraterritorial | 2018 |
| Sumo Digital Entertainment Limited | Professional & scientific | 2007 |
| Sumo Digital Group Limited | Professional & scientific | 2014 |
| Sumo Digital Holdings Limited | Financial services | 2014 |
| Sumo Games Development Limited | Information & communication | 2015 |
| Sumo Group Limited | Information & communication | 2017 |
| Sumomotors Ltd | Wholesale & retail | 2026 |
| Sumran Limited | Hospitality | 2025 |
| Sun and Moon Film Limited | Information & communication | 2022 |
| Sun Bear PUB Company Limited | Hospitality | 2020 |
| Sun House Takeaway Ltd | Hospitality | 2020 |
| Sun Inn Properties Limited | Hospitality | 2016 |
| Sun Market Preston Ltd | Wholesale & retail | 2020 |
| Sun YEE Ltd | Hospitality | 2021 |
| Sun-Kissed Dinnington Ltd | Other services | 2025 |
| Sunda Consulting Limited | Professional & scientific | 2024 |
| Sundaes Glossop Road Ltd | Hospitality | 2025 |
| Sunday Service Productions Limited | Information & communication | 2011 |
| Sunderhill Limited | Wholesale & retail | 1981 |
| Sundest Ltd | Wholesale & retail | 2025 |
| Sundress Limited | Arts & recreation | 2026 |
| Sunflower Nuts Ltd | Wholesale & retail | 2020 |
| Sunflower Trade Limited | Wholesale & retail | 2025 |
| Sunflowerdandelion Limited | Information & communication | 2024 |
| Sunfresh Vegetable Ltd | Hospitality | 2020 |
| Sungray Properties Limited | Real estate | 2017 |
| Sunnah Selfcare Limited | Health & social care | 2025 |
| Sunningdale Fire Services Limited | Professional & scientific | 2012 |
| Sunny Aggregates Ltd | Transport & logistics | 2024 |
| Sunny Disposition Ltd | Manufacturing | 2026 |
| Sunny Gifts Kiosk Limited | Wholesale & retail | 2014 |
| Sunny Paradise Resturant Limited | Manufacturing | 2026 |
| Sunnybank Projects Ltd | Professional & scientific | 2005 |
| Sunnybarn Investments Limited | Professional & scientific | 2017 |
| Sunnylshe Limited | Wholesale & retail | 2025 |
| Sunraydelicate Ltd | Wholesale & retail | 2025 |
| Sunrgy LED Lighting Limited | Wholesale & retail | 2020 |
| Sunrise Deli Limited | Hospitality | 2023 |
| Sunrise Food Trading Ltd | Wholesale & retail | 2025 |
| Sunrise Foods Ltd | Wholesale & retail | 2020 |
| Sunrise Wholesalers Ltd | Wholesale & retail | 2026 |
| Sunshine Care Centre Ltd | Health & social care | 2023 |
| Sunshine Industries Limited | Information & communication | 2019 |
| Sunshine Information Systems Limited | Information & communication | 2007 |
| Sunshine Ruth Limited | Administrative & support | 2018 |
| Sunshine Surgical Ltd | Health & social care | 2019 |
| Sunshine Valley Stocksbridge Limited | Hospitality | 2019 |
| Sunshine Vegan Deli Limited | Manufacturing | 2020 |
| Supa Aquatic Supplies Limited | Manufacturing | 1973 |
| Supa Holdings (Yorkshire) Limited | Administrative & support | 2014 |
| Supastrikers Stannington Ltd | Education | 2022 |
| Super Car Prestige Limited | Wholesale & retail | 2019 |
| Super Car Service Centre Limited | Wholesale & retail | 2025 |
| Super Choice Trading Limited | Wholesale & retail | 2013 |
| Super Clean Zone Ltd | Administrative & support | 2023 |
| Super Pet Productions Limited | Administrative & support | 2014 |
| Super Pound World £1 Ltd | Wholesale & retail | 2025 |
| Super Solar Installers Ltd | Energy | 2026 |
| Super Swimmers Limited | Arts & recreation | 2009 |
| Super Swimmers of Dinnington Limited | Arts & recreation | 2018 |
| Super Swimmers of Rotherham Limited | Education | 2025 |
| Super Swimmers Rossington Limited | Arts & recreation | 2025 |
| Super Twinkle Media UK Limited | Information & communication | 2020 |
| Super Vape Ltd | Wholesale & retail | 2026 |
| Super Work Studio Ltd | Information & communication | 2026 |
| Superb Plumbing and Heating Limited | Construction | 2021 |
| Superbchoice Ltd | Wholesale & retail | 2018 |
| Supercardriver Group Ltd | Extraterritorial | 2019 |
| Supercardriver Holdings Limited | Financial services | 2020 |
| Supercardriver Limited | Other services | 2010 |
| Superfast Studios Ltd | Information & communication | 2026 |
| Superfood Group Ltd | Financial services | 2020 |
| Superior Access Methods Ltd | Construction | 2020 |
| Supernova Heights Memorabilia Ltd | Wholesale & retail | 2022 |
| Superrmull Ltd | Wholesale & retail | 2026 |
| Supersafe Fire & Security Limited | Administrative & support | 2019 |
| Supersafe Solutions Limited | Administrative & support | 2013 |
| Supersales-Clearance Ltd | Wholesale & retail | 2022 |
| Supersonic Express Ltd | Wholesale & retail | 2022 |
| Supertram Assets Limited | Administrative & support | 1999 |
| Supertram Limited | Real estate | 1985 |
| Supper Car Valeting Limited | Administrative & support | 2024 |
| Supper CUT Barber Limited | Other services | 2025 |
| Supplement Hub Limited | Extraterritorial | 2021 |
| Supplied by J Limited | Wholesale & retail | 2023 |
| Supply Desk Limited | Administrative & support | 1999 |
| Supply the Market Ltd | Wholesale & retail | 2025 |
| Support Arts Gardening Education | Health & social care | 2006 |
| Support Dogs Limited | Health & social care | 2001 |
| Support Site Limited | Extraterritorial | 1988 |
| Support Social Care Heroes Limited | Health & social care | 2020 |
| Supportcare Holdings Limited | Financial services | 2007 |
| Supported Housing Services (South Yorkshire) Limited | Hospitality | 2013 |
| Supporting Locally Limited | Professional & scientific | 2011 |
| Supportmenow Ltd | Information & communication | 2011 |