| Sugar and Spice Productions Limited | Arts & recreation | 2019 |
| Sugar Interior Limited | Hospitality | 2015 |
| Sugar Rush by Cici Ltd | Manufacturing | 2017 |
| Sugar Rush Harrow Ltd | Hospitality | 2025 |
| Suggoi FBH Limited | Professional & scientific | 2015 |
| Sughan Ltd | Wholesale & retail | 2020 |
| Sugume Ltd | Wholesale & retail | 2025 |
| Suhrad Technologies PVT Ltd | Information & communication | 2025 |
| SUI Generis 3KNGS Limited | Professional & scientific | 2018 |
| Suited Agencies Limited | Wholesale & retail | 2018 |
| Sujus’S Spice & Bites Limited | Hospitality | 2026 |
| Sukh London Ltd | Transport & logistics | 2020 |
| Sukhdiya Ltd | Administrative & support | 2023 |
| Sukin Limited | Financial services | 2013 |
| Sulax (U.K) Limited | Professional & scientific | 1984 |
| Sulemanji & Wood Ltd | Professional & scientific | 2016 |
| Sulh Developments Ltd | Real estate | 2012 |
| Sullivan Brickwork Limited | Construction | 2020 |
| Sulove Beauty Limited | Other services | 2019 |
| Sulove Unisex Saloon Limited | Other services | 2023 |
| Sultan Medics Services Ltd | Health & social care | 2017 |
| Sultan Travel and Exchange Ltd | Financial services | 2023 |
| Sultani Elasto Products UK Ltd | Wholesale & retail | 2025 |
| Sultani Enterprises Global Ltd | Wholesale & retail | 2026 |
| Sultani Limited | Hospitality | 2018 |
| SUM Design Limited | Administrative & support | 2000 |
| Suma Pharma Limited | Wholesale & retail | 2025 |
| Suma Travel Limited | Administrative & support | 2025 |
| Sumal Investment Management Ltd | Real estate | 2015 |
| Suman Bros (Wholesale) Limited | Wholesale & retail | 1984 |
| Suman Mihai Ltd | Transport & logistics | 2011 |
| Suman Properties LLP | | 2018 |
| Sumaya Solutions Limited | Information & communication | 2020 |
| Sumerian Developments Ltd | Real estate | 2024 |
| Sumeru Karma Limited | Real estate | 2011 |
| Sumitra Limited | Real estate | 2021 |
| Summerling Carpets and Curtains Limited | Wholesale & retail | 1997 |
| Summit Advances Limited | Financial services | 2003 |
| Summit Dynamics Limited | Professional & scientific | 2024 |
| Summit Fundraising Ltd | Other services | 2017 |
| Summit Investment Group Limited | Real estate | 2024 |
| Summit Management Services Limited | Arts & recreation | 2023 |
| Summit Performance Engineering Ltd | Information & communication | 2026 |
| Summit Private Ltd | Real estate | 2026 |
| Summit Strategy and Solutions UK Ltd | Professional & scientific | 2025 |
| Sumy Limited | Real estate | 2012 |
| Sun & Vine Limited | Real estate | 2019 |
| Sun Exim Ltd | Water & waste | 2013 |
| Sun Holdings Limited | Other services | 2019 |
| Sun Marketing and Sales Ltd | Administrative & support | 2013 |
| Sun Moon Lake Limited | Hospitality | 2009 |
| Sun Retail Speke Ltd | Wholesale & retail | 2025 |
| Sun Shine Photography Studio Limited | Professional & scientific | 2024 |
| Sun UW UK Ltd | Financial services | 2019 |
| Sun Wellness Ltd | Wholesale & retail | 2025 |
| Sun Wholesale Ltd | Hospitality | 2022 |
| Sun-Ex 21 Limited | Construction | 2019 |
| Sunans Financing Ltd | Financial services | 2021 |
| Sunbury Assets Ltd | Real estate | 2024 |
| Sunday Cycles Ltd | Wholesale & retail | 2018 |
| Sundram International Limited | Financial services | 2016 |
| Sundwich Ltd | Hospitality | 2006 |
| Sunfish Productions UK Limited | Information & communication | 2025 |
| Sungrace Films Ltd | Information & communication | 2021 |
| Sunhawk Holdings Ltd | Real estate | 2026 |
| Suniket Solutions Limited | Information & communication | 2018 |
| Sunil 2025 Limited | Construction | 2025 |
| Sunmark Enterprises Limited | Manufacturing | 2022 |
| Sunnega Consulting Limited | Administrative & support | 2006 |
| Sunningdale Ruislip Management Limited | Real estate | 2011 |
| Sunny and Eman Limited | Other services | 2020 |
| Sunny Dancer Distribution Limited | Information & communication | 2024 |
| Sunny Dancer Production Limited | Information & communication | 2024 |
| Sunny Farm Developments Ltd | Construction | 2019 |
| Sunny Hill Enterprises Limited | Hospitality | 2020 |
| Sunny Side Surat Ltd | Manufacturing | 2025 |
| Sunny Sky Properties Limited | Real estate | 2017 |
| Sunny Top Cookham Limited | Construction | 2025 |
| Sunny's Goods Limited | Hospitality | 2021 |
| Sunnyway Group Limited | Real estate | 2022 |
| Sunpat Limited | Real estate | 2018 |
| Sunray Ventures Ltd | Construction | 1997 |
| Sunrise Care Providers Limited | Public administration | 2022 |
| Sunrise DRY Cleaners Ltd | Other services | 2020 |
| Sunrise Dwellings Ltd | Real estate | 2022 |
| Sunrise Eastern Group Limited | Real estate | 2026 |
| Sunrise Imports Ltd | Wholesale & retail | 2025 |
| Sunrise Property Group(Uk) Ltd | Real estate | 2025 |
| Sunrise View Management Company Limited | Households | 1988 |
| Sunset Seven Limited | Information & communication | 2013 |
| Sunshine Horizon Ltd | Arts & recreation | 2019 |
| Sunshine Lettings Limited | Households | 2022 |
| Sunshine Maids Ltd | Administrative & support | 2021 |
| Sunshine Nursery (Sunbury) Ltd | Education | 2012 |
| Suntide Properties Limited | Construction | 1987 |
| Sunview Properties Limited | Real estate | 1998 |
| Super and Social Limited | Wholesale & retail | 2020 |
| Super BBQ Ltd | Manufacturing | 2021 |
| Super Cars Club Ltd | Wholesale & retail | 2010 |
| Super Construction Limited | Construction | 2015 |