| Sukawatee (Hitchin) Limited | Hospitality | 2013 |
| Sukawatee ST Albans Limited | Hospitality | 2022 |
| Sukhchain Limited | Wholesale & retail | 2025 |
| Sukhniwas Logistics Limited | Transport & logistics | 2017 |
| Suko Compliance Ltd | Financial services | 2018 |
| Sula Building Services Ltd | Construction | 2026 |
| Suleman Health Tech Ltd | Health & social care | 2018 |
| Suleyman Dormund Ltd | Construction | 2025 |
| Sultan & Sons Enterprises Limited | Health & social care | 2008 |
| Sultan Builders Ltd | Construction | 2025 |
| Sultan Fish Bar Ltd | Hospitality | 2023 |
| Sultan Investments Holding Ltd | Real estate | 2026 |
| Sultan Strength Ltd | Wholesale & retail | 2023 |
| Sultana Investment Ltd | Real estate | 2020 |
| Sultanz Limited | Wholesale & retail | 2025 |
| SUM Logistics Ltd | Transport & logistics | 2024 |
| Summerset Food Ltd | Hospitality | 2019 |
| Summertown Guest House Limited | Hospitality | 2019 |
| Summit Health Group Ltd | Financial services | 2025 |
| Summitway Trading Limited | Wholesale & retail | 2026 |
| Sunan Academy Ltd | Wholesale & retail | 2019 |
| Suncera Ltd | Wholesale & retail | 2020 |
| Sundon Homes Limited | Construction | 2012 |
| Sundon Nursery Ltd | Health & social care | 2018 |
| Sundon Park Carwash Ltd | Other services | 2021 |
| Sundon Park Centre Trust | Arts & recreation | 2003 |
| Sundon Park Management Company Limited | Professional & scientific | 1990 |
| Sundon Park MOT & Servicing Centre Ltd | Wholesale & retail | 2024 |
| Sundon Properties Limited | Real estate | 2019 |
| Sundon Road Management Limited | Households | 2010 |
| Sunflowers Early Development Centre Ltd | Education | 2018 |
| Sunilla Travel Ltd | Transport & logistics | 2018 |
| Sunlight Tanning Ltd | Other services | 2017 |
| Sunmoon Store Limited | Wholesale & retail | 2024 |
| Sunnah Archery Club Ltd | Education | 2024 |
| Sunnah Foods Ltd | Wholesale & retail | 2017 |
| Sunnah Social Care Ltd | Health & social care | 2024 |
| Sunnah Travel Ltd | Administrative & support | 2023 |
| Sunner Estates Limited | Real estate | 2019 |
| Sunni-Ed Limited | Wholesale & retail | 2019 |
| Sunny Fields Enterprise Limited | Manufacturing | 2014 |
| Sunny Shine Cleaning Ltd | Administrative & support | 2025 |
| Sunnyside Nursery Luton Ltd | Education | 2011 |
| Sunridge Care & Cleaning Solutions PVT Ltd. | Administrative & support | 2016 |
| Sunrise Builders Limited | Construction | 2007 |
| Sunrise CNC Engineering Limited | Real estate | 1998 |
| Sunrise Infinity Limited | Construction | 2024 |
| Sunrise Travels Centre Limited | Administrative & support | 2010 |
| Sunseeker Doors Limited | Extraterritorial | 2011 |
| Sunset Productions Ltd | Construction | 2014 |
| Sunshine Co., Ltd | Wholesale & retail | 2023 |
| Sunshine Cruises Limited | Other services | 2000 |
| Sunshine Health and Care Services Ltd | Information & communication | 2025 |
| Sunshinestar Limited | Wholesale & retail | 2025 |
| Sunstone Tiles (UK) Limited | Wholesale & retail | 2015 |
| Sunsurfer Arts & Education Consultancy Ltd | Information & communication | 2016 |
| Supanex Limited | Information & communication | 2026 |
| Super BUD Ltd | Construction | 2024 |
| Super Cleaning Masters Ltd | Administrative & support | 2026 |
| Super Domestic & Commercial Cleaning Services Ltd | Administrative & support | 2022 |
| Super Floor Sanding Ltd | Construction | 2023 |
| Super Jacked Limited | Wholesale & retail | 2025 |
| Super Slam Luton Ltd | Hospitality | 2024 |
| Superb Refurb Ltd | Real estate | 2026 |
| Superfinace Ltd | Agriculture & fishing | 2025 |
| Superior Security (UK) Limited | Administrative & support | 2014 |
| Supermo Solutions Ltd | Administrative & support | 2026 |
| Supersonic IT Solutions Ltd | Information & communication | 2012 |
| Supertreads Automotive Ltd | Wholesale & retail | 2012 |
| Supervolts Ltd | Construction | 2015 |
| Suplan Ltd | Extraterritorial | 2026 |
| Supper Cars Ltd | Wholesale & retail | 2023 |
| Supply Chain Talent Ltd | Professional & scientific | 2017 |
| Support Pluss Ltd | Other services | 2017 |
| Supportit Limited | Information & communication | 2008 |
| Supreme Car Wash Luton Limited | Wholesale & retail | 2022 |
| Supreme Engineers Private Ltd | Wholesale & retail | 2017 |
| Supreme Goods Ltd | Construction | 2026 |
| Supreme K9'S Ltd | Extraterritorial | 2023 |
| Supreme Mobile Homes Ltd | Real estate | 2026 |
| Supreme Projects Ltd | Construction | 2026 |
| Supreme Tyres Luton Ltd | Wholesale & retail | 2024 |
| Supremelink Global Enterprise Ltd | Administrative & support | 2016 |
| Sura B&R Ltd | Wholesale & retail | 2018 |
| Sure Market Ltd | Wholesale & retail | 2026 |
| Sure Security Services Limited | Administrative & support | 2025 |
| Surgicalbot Systems Ltd | Manufacturing | 2026 |
| Surma LEA Ltd | Hospitality | 2021 |
| Surma Stores Limited | Wholesale & retail | 1998 |
| Sursum Innvest Limited | Real estate | 2020 |
| Suryadeventerprise Ltd | Health & social care | 2024 |
| Suryia Honey Ltd | Wholesale & retail | 2025 |
| Sushi Plus Limited | Hospitality | 2025 |
| Sushvin Consultancy Services Limited | Wholesale & retail | 2021 |
| Sushvin Melgiri Limited | Real estate | 2023 |
| Sustainable Properties Ltd | Real estate | 2011 |
| Sustainable Urban Drainage Systems Ltd | Wholesale & retail | 2019 |
| Suyi UK Limited | Wholesale & retail | 2021 |
| SV Global Tech and Transit Limited | Transport & logistics | 2026 |
| Svarga Ltd | Households | 2022 |