| SLH Developments Limited | Construction | 2023 |
| Slh&G Ltd | Construction | 2021 |
| Slice Delight Limited | Hospitality | 2025 |
| Slick Slips UK Ltd | Construction | 2025 |
| Slide Away Records Ltd | Information & communication | 2019 |
| Slightly Reckless Games Ltd | Manufacturing | 2023 |
| Slimesquest Ltd | Real estate | 2021 |
| Slimetime Ltd | Hospitality | 2025 |
| Slimeville Ltd | Hospitality | 2024 |
| Slimeville W Ltd | Arts & recreation | 2026 |
| Slimline Stairlifts Ltd | Manufacturing | 2014 |
| Slims at Bold Street Limited | Hospitality | 2019 |
| Slip Property Investments Ltd | Real estate | 2025 |
| Slirc Holdings Limited | Financial services | 2023 |
| SLJ Civils Limited | Administrative & support | 2017 |
| Sljl Construction Ltd | Construction | 2021 |
| SLK Developments North West Ltd | Real estate | 2015 |
| SLK Lettings Ltd | Real estate | 2025 |
| SLK2 (North West) Ltd | Real estate | 2026 |
| Slkc Limited | Arts & recreation | 2014 |
| SLL Darwen Ltd | Construction | 2025 |
| SLL Intervention Care Limited | Health & social care | 2025 |
| SLL Lettings Ltd | Real estate | 2018 |
| SLL Residential Limited | Real estate | 2011 |
| Sllam Ltd | Other services | 2019 |
| Sllk Property Ltd | Real estate | 2024 |
| SLM Distributions Ltd | Wholesale & retail | 2026 |
| SLM Plumbing / Heating Ltd | Construction | 2016 |
| SLM Services Limited | Health & social care | 2018 |
| Sloane Aesthetics Limited | Health & social care | 2022 |
| SLP Group Ltd | Construction | 2025 |
| SLR Entertainment Ltd | Hospitality | 2023 |
| SLR Holdings NW Ltd | Professional & scientific | 2020 |
| SLS Communications Limited | Construction | 2010 |
| SLS Rooms Ltd | Hospitality | 2026 |
| SLT Consulting Ltd | Information & communication | 2018 |
| SLT Property Services Ltd | Real estate | 2025 |
| Sltc Ltd | Administrative & support | 2013 |
| Slug Disco Studios Limited | Information & communication | 2014 |
| Slurp House Ltd | Hospitality | 2026 |
| Slushed LVP Ltd | Hospitality | 2026 |
| SLW Property and Maintenance Ltd | Real estate | 2026 |
| Slwalker Houses Ltd | Real estate | 2016 |
| SM Block Management Ltd | Real estate | 2022 |
| SM Building Management Ltd | Real estate | 2020 |
| SM Cabs Ltd | Administrative & support | 2018 |
| SM Cars (NW) Ltd | Wholesale & retail | 2022 |
| SM Construction (NW) Ltd | Construction | 2020 |
| SM Corporate Ltd | Professional & scientific | 2018 |
| SM Cost Consultancy Ltd | Professional & scientific | 2016 |
| SM Detailing & Facilities Management Ltd | Administrative & support | 2026 |
| SM Engineers Limited | Professional & scientific | 2025 |
| SM Group NW Limited | Construction | 2024 |
| SM Installations (NW) Ltd | Construction | 2018 |
| SM IT Enterprises Limited | Information & communication | 2012 |
| SM Lighting Ltd | Professional & scientific | 2025 |
| SM Liverpool Limited | Hospitality | 2026 |
| SM Purchasing Services Ltd | Real estate | 2025 |
| SM Redmond Limited | Financial services | 2025 |
| SM Smart Energy Ltd | Energy | 2022 |
| SM Turkish Grill Ltd | Hospitality | 2025 |
| Small Batch Records Ltd | Information & communication | 2025 |
| Small Bridge Developments Limited | Construction | 2022 |
| Small Business Consulting Limited | Education | 2006 |
| Small Business Loans Limited | Financial services | 1995 |
| Small Profits Limited | Administrative & support | 2024 |
| Small Wonders Day Care Nursery (LEA Green) Limited | Health & social care | 2016 |
| Small Wonders Day Care Nursery (Peasley Cross) Limited | Health & social care | 2014 |
| Small Wonders Day Care Nursery (Thatto Heath) Ltd | Health & social care | 2011 |
| Small Wonders Day Care Nursery Limited | Health & social care | 2009 |
| Small World Day Nursery & Pre-School Ltd | Education | 2017 |
| Smallbrook Lane Management Company Ltd | Extraterritorial | 2017 |
| Smaller Earth EOT Limited | Professional & scientific | 2025 |
| Smaller Earth Group Holdings Limited | Financial services | 2023 |
| Smaller Earth Group Limited | Administrative & support | 2008 |
| Smaller Earth Limited | Education | 1999 |
| Smalley Ward Limited | Construction | 2021 |
| Smallwood Parcels Ltd | Transport & logistics | 2025 |
| Smart and Dears Holdings Ltd | Financial services | 2019 |
| Smart Box Office Ltd | Arts & recreation | 2021 |
| Smart Broker Ltd | Administrative & support | 2011 |
| Smart Business Experts Ltd | Information & communication | 2014 |
| Smart Buy Systems Ltd | Wholesale & retail | 2025 |
| Smart Car Wash(Brewster Street) Ltd | Other services | 2016 |
| Smart Choice Windows, Conservatories and Doors Limited | Construction | 2010 |
| Smart Cloud Limited | Information & communication | 2017 |
| Smart Coaching Ltd | Administrative & support | 2024 |
| Smart Connecting Limited | Wholesale & retail | 2020 |
| Smart D&H Properties Ltd | Households | 2021 |
| Smart Digi-Solutions Ltd | Information & communication | 2025 |
| Smart Electrical Integrations Ltd | Construction | 2021 |
| Smart EN Co Ltd | Professional & scientific | 2019 |
| Smart Fire and Construction Ltd | Construction | 2020 |
| Smart FIX Building & Maintenance Ltd | Construction | 2024 |
| Smart FOX International Ltd. | Wholesale & retail | 2016 |
| Smart Globel Ltd | Administrative & support | 2025 |
| Smart Holdings NW Ltd | Real estate | 2020 |
| Smart Homes Associates Ltd | Real estate | 2016 |
| Smart Integrated Services Ltd | Construction | 2021 |
| Smart Living NW Limited | Real estate | 2021 |