| SJG Electrical Contractors Ltd | Construction | 2020 |
| SJG1983 Development Limited | Information & communication | 2013 |
| Sjld Ltd | Health & social care | 2021 |
| SJM and R PVT Ltd | Hospitality | 2025 |
| SJP Aesthetics Ltd | Health & social care | 2023 |
| SJS Technical Services Limited | Construction | 2015 |
| SK & V Limited | Administrative & support | 2021 |
| SK Associates London Limited | Professional & scientific | 2017 |
| SK Building and Design Ltd | Construction | 2025 |
| SK Design Engineering Ltd | Professional & scientific | 2018 |
| SK Enterprises (London) Limited | Wholesale & retail | 2013 |
| SK Imanje Limited | Real estate | 2024 |
| SK Precision CUT Ltd | Health & social care | 2024 |
| SK Prime Trading Ltd | Wholesale & retail | 2025 |
| SK Supply UK Limited | Wholesale & retail | 2025 |
| SK Ventures Ltd | Financial services | 2019 |
| SK5 Consultancy Limited | Professional & scientific | 2023 |
| Skaaap Properties LLP | | 2021 |
| Skab Security Services Ltd | Administrative & support | 2022 |
| Skaelectrics Limited | Construction | 2019 |
| Skanda Homes Limited | Real estate | 2022 |
| Skate Inn Ltd | Arts & recreation | 2023 |
| Skaty Foodi Wine Limited | Wholesale & retail | 2025 |
| Skay Asset Management Ltd | Real estate | 2025 |
| SKB Couriers Limited | Transport & logistics | 2017 |
| SKB Engineering Services Ltd | Construction | 2009 |
| SKD Food & Drinks Limited | Wholesale & retail | 2025 |
| Skilfully Aligned Ltd | Information & communication | 2019 |
| Skill Suit Limited | Education | 2013 |
| Skillectrics Limited | Construction | 2024 |
| Skillfoot Academy of Football Limited | Education | 2014 |
| Skills Builder Empowerment CIC | Health & social care | 2024 |
| Skills Globe Ltd | Administrative & support | 2022 |
| Skills to Donate | Hospitality | 2012 |
| SKILLSUP4ALL Ltd | Education | 2026 |
| Skillzweb Ltd | Administrative & support | 2011 |
| Skilton Electrical Limited | Construction | 2000 |
| Skin Hair & Beauty Academy Ltd | Wholesale & retail | 2016 |
| Skin Therapies & Co Ltd | Health & social care | 2022 |
| Skinly Ltd | Wholesale & retail | 2020 |
| Skinner Ventures Limited | Real estate | 2020 |
| Skins by SHE Ltd | Wholesale & retail | 2020 |
| Skjm Group Ltd | Wholesale & retail | 2024 |
| Skjn Construction Limited | Construction | 2026 |
| SKM Holdings Ltd | Real estate | 2019 |
| SKM Software and Solutions Limited | Information & communication | 2026 |
| SKN Retail Limited | Wholesale & retail | 2021 |
| SKN Systems Ltd | Manufacturing | 2024 |
| Skre Limited | Wholesale & retail | 2011 |
| SKT Ltd | Professional & scientific | 2024 |
| SKV Group Trade Ltd | Wholesale & retail | 2016 |
| Sky Beam NB Limited | Professional & scientific | 2018 |
| Sky Blue Theatre Company Ltd | Education | 2007 |
| Sky Cleaning Solution Ltd | Administrative & support | 2026 |
| Sky Directors Limited | Other services | 2008 |
| Sky Fruits UK Ltd | Other services | 2021 |
| Sky Secretaries Limited | Other services | 2008 |
| Skye Tools & Fixings Ltd | Wholesale & retail | 2023 |
| Skyerox Limited | Real estate | 2016 |
| Skygene Ltd | Extraterritorial | 2024 |
| Skylark Place Management Company Limited | Households | 2017 |
| Skylife Maintenance Ltd | Construction | 2021 |
| Skylife Real Estate Ltd | Real estate | 2025 |
| Skylife Stays Ltd | Hospitality | 2024 |
| Skyline 117 Limited | Real estate | 2018 |
| Skyline Property Partners Ltd | Real estate | 2024 |
| Skyline Trade Partners Limited | Wholesale & retail | 2025 |
| Skylineeducationalservices Ltd | Education | 2024 |
| Skylyne Global Ltd | Wholesale & retail | 2025 |
| Skyneath Ltd | Construction | 2015 |
| Skyplanet Trading Co., Limited | Wholesale & retail | 2025 |
| Skyrocket Toys (UK) Limited | Information & communication | 2016 |
| Skyrocket U.K. Limited | Administrative & support | 2003 |
| Skyvn Restaurant Ltd | Hospitality | 2026 |
| SL Casey QS Services Limited | Professional & scientific | 2013 |
| SL Legal Services Limited | Professional & scientific | 2024 |
| SL Motor Repairs Ltd | Wholesale & retail | 2011 |
| SL Motors & Mobile Mechanics Ltd | Wholesale & retail | 2024 |
| Slavchosoft Ltd | Information & communication | 2025 |
| Slcqs Ltd | Professional & scientific | 2023 |
| Sleepymunchkins Ltd | Other services | 2010 |
| Sleezyprime Ltd | Real estate | 2024 |
| SLG Creative Ltd | Arts & recreation | 2026 |
| Slick Property Management Limited | Real estate | 2023 |
| Slickkuts Ltd | Other services | 2024 |
| Slide Dance Limited | Arts & recreation | 2013 |
| Slimim Enterprises Ltd | Real estate | 2024 |
| Slinga Ltd | Professional & scientific | 2025 |
| Slipe Drove Management Ltd | Households | 2022 |
| Sloane Court (Amesbury) Management Company Ltd | Households | 2016 |
| SLS Refrigeration & Air Conditioning Ltd | Manufacturing | 2012 |
| SLT Accessible Ltd | Transport & logistics | 2024 |
| SLV Hairdressing Limited | Other services | 2024 |
| SM Cafe Limited | Hospitality | 2022 |
| SM Catering and Takeaway Ltd | Hospitality | 2013 |
| SM Global International Solutions Limited | Wholesale & retail | 2026 |
| SM Hair & Beauty Studio Ltd | Other services | 2026 |
| SM Solution PVT Ltd | Information & communication | 2026 |
| SM Solutions Group Ltd | Administrative & support | 2026 |
| SM Tatar Ltd | Construction | 2025 |