| SK Enterprise Group Ltd | Wholesale & retail | 2025 |
| SK Food & Wine Ltd | Wholesale & retail | 2014 |
| SK Freight (UK) Ltd | Transport & logistics | 2022 |
| SK Freight Services Ltd | Transport & logistics | 2019 |
| SK Global Innovations Ltd | Wholesale & retail | 2025 |
| SK Online Ltd | Wholesale & retail | 2017 |
| SK Properties Management Ltd | Real estate | 2026 |
| SK Seasons Ltd | Wholesale & retail | 2021 |
| SK Vaping Ltd | Wholesale & retail | 2021 |
| SK Wine and Food Limited | Wholesale & retail | 2017 |
| SK13 Investments Ltd | Real estate | 2025 |
| Skansafe Limited | Real estate | 2024 |
| Skark Distribution Ltd | Wholesale & retail | 2018 |
| SKH Builders Ltd | Construction | 2015 |
| Skill One Services Ltd | Professional & scientific | 2023 |
| Skills Corporation Ltd Limited | Health & social care | 2021 |
| Skills for Life Education and Training Consultancy Ltd | Education | 2019 |
| Skills Learning UK Limited | Administrative & support | 2017 |
| Skillsrec Ltd | Administrative & support | 2023 |
| Skin Health Practice Ltd | Health & social care | 2020 |
| SKIP4UK Ltd | Construction | 2019 |
| SKK Pharma Ltd | Wholesale & retail | 2022 |
| SKM Networks Ltd | Information & communication | 2014 |
| SKP London Ltd | Real estate | 2020 |
| Skrr Ltd | Construction | 2025 |
| SKS Housing Ltd | Real estate | 2024 |
| SKT Traders Ltd | Wholesale & retail | 2025 |
| Sky Airport Cars Limited | Transport & logistics | 2025 |
| Sky Bodyworks Ltd | Wholesale & retail | 2022 |
| Sky BUILDERS1 Ltd | Construction | 2024 |
| Sky Diamond Limited | Professional & scientific | 1999 |
| Sky Guard Roofing Ltd | Construction | 2025 |
| Sky High Freightways Ltd | Transport & logistics | 2024 |
| Sky Luxe Airways Ltd | Transport & logistics | 2024 |
| Sky Media & Consultancy Limited | Professional & scientific | 2023 |
| Sky Swift Courier Limited | Transport & logistics | 2020 |
| Sky&Moon Ltd | Wholesale & retail | 2021 |
| Skyframe Studios Ltd | Information & communication | 2025 |
| Skyhighs Consulting Limited | Information & communication | 2024 |
| Skyline Air Services Limited | Transport & logistics | 2021 |
| Skyline Cabs Ltd | Transport & logistics | 2024 |
| Skyline Chauffeurs Ltd | Transport & logistics | 2023 |
| Skyline Smiles Ltd | Health & social care | 2026 |
| Skyline Trader Limited | Wholesale & retail | 2023 |
| Skyline Trading UK Ltd | Wholesale & retail | 2025 |
| Skyline Works Construction Limited | Manufacturing | 2026 |
| Skylines Trips Ltd | Administrative & support | 2025 |
| Skylink Executive Cars Limited | Transport & logistics | 2017 |
| Skyn Clin Ltd | Other services | 2026 |
| Skynet International Holding Limited | Financial services | 2021 |
| Skynet Technologies Ltd | Information & communication | 2012 |
| Skynet Worldwide Express Limited | Transport & logistics | 2001 |
| Skynet Worldwide Express Management Company Limited | Professional & scientific | 2001 |
| Skynnex Limited | Other services | 2016 |
| Skynnexav Services Limited | Other services | 2017 |
| Skyport Enterprise UK Limited | Real estate | 2023 |
| Skyrise Assets & Investments Ltd | Real estate | 2022 |
| Skyrise Developments Ltd | Construction | 2022 |
| Skysurfer Limited | Professional & scientific | 2013 |
| Skyview Horizons Ltd | Real estate | 2022 |
| SL Global Technologies Limited | Information & communication | 2010 |
| SL Japan Associates Limited | Professional & scientific | 2026 |
| SL Trading Services Limited | Hospitality | 2024 |
| Slantwise Limited | Wholesale & retail | 2025 |
| Slashpk Limited | Wholesale & retail | 2022 |
| Slligi Limited | Other services | 2021 |
| Slough Ltd | Real estate | 2021 |
| Slow Brew Ltd | Financial services | 2021 |
| Slushy Cups Limited | Wholesale & retail | 2020 |
| SM Builder London Ltd | Construction | 2023 |
| SM Prohire Ltd | Administrative & support | 2023 |
| Smaart Recruitment UK Ltd | Administrative & support | 2025 |
| Smakpol Ltd | Wholesale & retail | 2025 |
| Smart 4 Property Investment Limited | Real estate | 2025 |
| Smart Accounts Ltd | Transport & logistics | 2022 |
| Smart Buy International Limited | Wholesale & retail | 2024 |
| Smart Cargo & Travel Ltd | Transport & logistics | 2018 |
| Smart Clues Ltd | Hospitality | 2025 |
| Smart Coding Limited | Education | 2021 |
| Smart Digitalpartners Ltd | Information & communication | 2026 |
| Smart Ecommerce Limited | Wholesale & retail | 2019 |
| Smart Health Clinics Limited | Information & communication | 2023 |
| Smart Kliks Limited | Professional & scientific | 2020 |
| Smart Lock Limited | Wholesale & retail | 2015 |
| Smart Play PVT Ltd | Education | 2016 |
| Smart Resume Ltd | Administrative & support | 2025 |
| Smart Tech Worldwide Ltd | Wholesale & retail | 2021 |
| Smartkicks Limited | Wholesale & retail | 2022 |
| Smartloyal Ltd | Information & communication | 2011 |
| Smartsavers Bargains Ltd | Wholesale & retail | 2025 |
| Smartshieldroofs Ltd | Construction | 2024 |
| Smartt Gym BH Limited | Arts & recreation | 2025 |
| Smartt Gym Ltd | Arts & recreation | 2024 |
| Smasher Sports Limited | Arts & recreation | 2006 |
| Smeca Ltd | Education | 2022 |
| SMG Convenience Store Ltd | Wholesale & retail | 2016 |
| SMG Fashion Limited | Wholesale & retail | 2026 |
| SMI Tech Limited | Wholesale & retail | 2017 |
| Smile Dent Instruments Limited | Wholesale & retail | 2017 |
| Smileon Ltd | Health & social care | 2025 |