| Studyexcel (UK) Limited | Education | 2012 |
| Stuffd Foods Limited | Wholesale & retail | 2024 |
| Stuffhere Projects Ltd | Other services | 2013 |
| Stuffuneed Limited | Wholesale & retail | 2023 |
| Stunder Ltd | Construction | 2011 |
| Stuvi Ltd | Information & communication | 2026 |
| Style Mart Ltd | Construction | 2024 |
| Styledbytemi Ltd | Other services | 2022 |
| Stylefeed UK Limited | Wholesale & retail | 2015 |
| Stylehigh Limited | Professional & scientific | 2000 |
| Styler Street Apparel Ltd | Manufacturing | 2021 |
| Stylex Party & Gift Shop Ltd | Wholesale & retail | 2013 |
| Stylish Ecom Limited | Wholesale & retail | 2025 |
| Stylux Limited | Wholesale & retail | 2020 |
| Sual Properties Limited | Real estate | 2025 |
| Sub-Link UK Limited | Construction | 2019 |
| Subby London Ltd. | Hospitality | 2025 |
| Subcarbon Limited | Administrative & support | 1997 |
| Subcontractor Status Limited | Professional & scientific | 2015 |
| Subedge UK Ltd | Hospitality | 2025 |
| Subelite Ltd | Hospitality | 2025 |
| Sublime Diving Limited | Arts & recreation | 2001 |
| Sublime Solutions Ltd | Professional & scientific | 2023 |
| Success Childcare Limited | Health & social care | 2020 |
| Success With US Limited | Education | 2025 |
| Succesul ARE Voce Ltd | Information & communication | 2023 |
| Sudarsan Limited | Wholesale & retail | 2025 |
| Sufa Properties Ltd | Real estate | 2025 |
| Sufa Solutions Ltd | Construction | 2020 |
| Suffolk Tyres Limited | Wholesale & retail | 2025 |
| Sufi Foods Ltd | Hospitality | 2023 |
| Sufibeeps Ltd | Health & social care | 2023 |
| Sufyan Digital Solutions Ltd | Wholesale & retail | 2026 |
| Sugar Cube Productions Ltd | Manufacturing | 2011 |
| Suit Range Limited | Hospitality | 2025 |
| Sukhbaaz Construction Ltd | Construction | 2024 |
| Sukhera Trading Ltd | Wholesale & retail | 2026 |
| Sukhi Carpets Ltd | Wholesale & retail | 2026 |
| Sukhi Roofing Ltd | Construction | 2021 |
| Sukhmani Day Care Limited | Administrative & support | 2018 |
| Sukhpadda Properties Ltd | Real estate | 2020 |
| Sukun Oasis Ltd | Hospitality | 2024 |
| Sulah Limited | Administrative & support | 2006 |
| Sultan Services Limited | Transport & logistics | 2018 |
| Sultan Venture Perfume Ltd | Wholesale & retail | 2026 |
| Sumaiya Properties Ltd | Real estate | 2026 |
| Sumden Limited | Construction | 2025 |
| Summerly Limited | Other services | 2021 |
| Summit Enterprises PVT. Ltd. | Wholesale & retail | 2025 |
| Summit Lodge Ltd | Health & social care | 2014 |
| Summit Rental Properties Limited | Real estate | 2020 |
| Summit Trade Group Ltd | Wholesale & retail | 2024 |
| Sumo Solutions Ltd | Information & communication | 2013 |
| Sumud Scents Ltd | Wholesale & retail | 2019 |
| Sun Bells Ltd | Real estate | 2026 |
| Sun Contracts Ltd | Other services | 2023 |
| Sun Frost Technologies Ltd | Information & communication | 2025 |
| Sun Rise Suppliers Limited | Wholesale & retail | 2025 |
| Suncomfort Limited | Construction | 2014 |
| Sunflower Beauty Studio Ltd | Other services | 2018 |
| Sunn Care Limited | Health & social care | 2019 |
| Sunny Caudex Plant Ltd | Other services | 2024 |
| Sunny's Brothers Ltd | Wholesale & retail | 2025 |
| Sunnyflower Limited | Wholesale & retail | 2021 |
| Sunnymede Pre-School Limited | Education | 2009 |
| Sunnytek Limited | Information & communication | 2025 |
| Sunpal Ltd | Information & communication | 2026 |
| Sunprabon Technologies Limited | Information & communication | 2024 |
| Sunria Ltd | Wholesale & retail | 2025 |
| Sunrise Lutong Bahay Ltd | Hospitality | 2023 |
| Sunrise Management & Consultancy Limited | Real estate | 2024 |
| Sunrise Realtors Limited | Real estate | 2026 |
| Suntech Global Ltd | Wholesale & retail | 2021 |
| Super Blessings Ltd | Wholesale & retail | 2022 |
| Super Blessings One Ltd | Wholesale & retail | 2022 |
| Super Cleaning London Ltd | Administrative & support | 2023 |
| Super Energy Solution Ltd | Construction | 2020 |
| Super Flex Courier Limited | Transport & logistics | 2025 |
| Super Grain Limited | Wholesale & retail | 2012 |
| Super Speedy Transport Ltd | Transport & logistics | 2018 |
| Super Thinkers (Chelmsford) Ltd | Education | 2024 |
| Super Thinkers (Colchester) Limited | Education | 2025 |
| Super Thinkers Ltd | Education | 2012 |
| Superdirectelecom Ltd | Wholesale & retail | 2020 |
| Superfloorsuk Ltd | Construction | 2023 |
| Superior Management Services Ltd | Administrative & support | 2024 |
| Superior Security Services Ltd | Administrative & support | 2022 |
| Superior Tech Ltd | Wholesale & retail | 2019 |
| Superior Ventures Limited | Hospitality | 2021 |
| Supermama Limited | Other services | 2024 |
| Supersonic Sound Ltd. | Manufacturing | 2013 |
| Supersourz Limited | Wholesale & retail | 2024 |
| Supo International Ltd | Wholesale & retail | 2017 |
| Supply N' Fit Tyres Romford Ltd | Wholesale & retail | 2024 |
| Support Build Construction Ltd | Administrative & support | 2022 |
| Supporting Your Independence Ltd | Administrative & support | 2020 |
| Supportive Lounge Ltd | Financial services | 2020 |
| Supra Secure Limited | Hospitality | 2024 |
| Supreme Care Services (London) Ltd | Health & social care | 2022 |
| Supreme Contact Solutions Ltd | Information & communication | 2025 |