| S & S Stores Roath Ltd | Wholesale & retail | 2020 |
| S & S Wholesale Ltd | Wholesale & retail | 2018 |
| S & W Property and Maintenance Ltd | Real estate | 2024 |
| S a Ductwork Ltd | Construction | 2014 |
| S a H Hair and Make-Up Services Limited | Other services | 2013 |
| S a R Security Limited | Administrative & support | 2019 |
| S and G MC Ardle Enterprises Ltd | Wholesale & retail | 2022 |
| S and J Knight Ltd | Professional & scientific | 2025 |
| S and M Healthcare Limited | Health & social care | 2022 |
| S and M Housing Limited | Real estate | 2023 |
| S and P Property Partners Limited | Real estate | 2026 |
| S and R Golf Limited | Wholesale & retail | 2022 |
| S and W Learning Limited | Other services | 2015 |
| S B Gate Ltd | Other services | 2018 |
| S B K Transport Ltd | Transport & logistics | 2019 |
| S Beauty LDN Limited | Other services | 2025 |
| S Beauty Ltd | Wholesale & retail | 2017 |
| S C Productions Limited | Other services | 2006 |
| S C Renewable Solutions Ltd | Wholesale & retail | 2019 |
| S Caisor Transport Limited | Transport & logistics | 2016 |
| S D Jones Healthcare Limited | Health & social care | 2015 |
| S Dodd Planing Services Limited | Construction | 2017 |
| S Fine Build Ltd | Construction | 2019 |
| S Formers and Embroidery Ltd | Manufacturing | 2019 |
| S G Books Ltd | Professional & scientific | 2018 |
| S Galea Electrical Ltd | Construction | 2014 |
| S Gami Limited | Real estate | 2023 |
| S H & M J Investment Ltd | Hospitality | 2016 |
| S J Daniel Engineering Services Limited | Professional & scientific | 1998 |
| S J Evans and SON Limited | Wholesale & retail | 2013 |
| S J Welsh Limited | Health & social care | 2014 |
| S K Barnard Ltd | Real estate | 2025 |
| S K Fabs Limited | Real estate | 2017 |
| S K Nails Ltd | Other services | 2017 |
| S Kenneally Medical Limited | Health & social care | 2017 |
| S Khalil Services Limited | Health & social care | 2024 |
| S Khan Business Limited | Wholesale & retail | 2015 |
| S L Comm Limited | Construction | 2012 |
| S L Mills Limited | Information & communication | 2015 |
| S M Carpentry & Building Services Ltd | Construction | 2022 |
| S Mcleod Solutions Limited | Professional & scientific | 2015 |
| S N Melville Limited | Professional & scientific | 2017 |
| S One Solution Ltd | Information & communication | 2025 |
| S Richards Ltd | Information & communication | 2024 |
| S S O Almotakhses for Trade Ltd | Wholesale & retail | 2025 |
| S T Medic Limited | Health & social care | 2010 |
| S U SPO Ltd | Wholesale & retail | 2015 |
| S W Fleming Limited | Construction | 2018 |
| S W Fleming Properties Limited | Real estate | 2024 |
| S W Plastic Solutions Ltd | Manufacturing | 2016 |
| S W Plastics & Facia Limited | Construction | 2025 |
| S Woodward Electrical Ltd | Construction | 2019 |
| S&A Properties Holdings (South Wales) Limited | Financial services | 2025 |
| S&A Serviced Properties Ltd | Hospitality | 2019 |
| S&A Smiles & Assets Ltd | Hospitality | 2026 |
| S&B Byba Properties Ltd | Real estate | 2024 |
| S&B Universal Services Ltd | Transport & logistics | 2019 |
| S&E Farrell Limited | Transport & logistics | 2014 |
| S&G Mcardle Ltd | Wholesale & retail | 2019 |
| S&H Corporation Limited | Wholesale & retail | 2025 |
| S&K Engineering Ltd | Manufacturing | 2023 |
| S&L Obsidian Ltd | Administrative & support | 2025 |
| S&L Ratio Consulting Ltd | Real estate | 2026 |
| S&L Residential Investments Ltd | Real estate | 2025 |
| S&M MAX Ltd | Wholesale & retail | 2021 |
| S&P Building Management Limited | Administrative & support | 2013 |
| S&P Capital Investments Limited | Real estate | 2013 |
| S&R Multi Skill Contractors Ltd | Construction | 2025 |
| S&R Oriental and General Merchandise LP | | 2022 |
| S&R Property Management Limited | Real estate | 2018 |
| S&R Racing Ltd | Arts & recreation | 2019 |
| S&S Automobile Ltd | Wholesale & retail | 2023 |
| S&S Lemon Shop Ltd | Wholesale & retail | 2025 |
| S&S Recruitment UK Ltd | Administrative & support | 2017 |
| S&Yg Property Ltd | Real estate | 2025 |
| S&Z Hand Carwash & Tyres Ltd | Wholesale & retail | 2020 |
| S-Door Systems Ltd | Construction | 2019 |
| S-M-O Lock Management Ltd | Other services | 2019 |
| S-Thetic Appeal Limited | Other services | 2017 |
| S. & L. Deyong Limited | Real estate | 1939 |
| S. Hemmadi Ltd. | Health & social care | 2005 |
| S. Hoines Limited | Professional & scientific | 2014 |
| S. K. Dyer Enterprises Limited | Wholesale & retail | 2019 |
| S. Law Properties Limited | Real estate | 2003 |
| S. M Dubai Fashion Ltd | Wholesale & retail | 2016 |
| S. Palmer Ltd | Administrative & support | 2014 |
| S. Pugh & SON (Garden Centre) Limited | Wholesale & retail | 1984 |
| S. Sotirca Ltd | Administrative & support | 2017 |
| S. Tarr Carpets Limited | Professional & scientific | 2002 |
| S. W. Jordan Limited | Health & social care | 2006 |
| S.A. Brain & Company Ventures Limited | Extraterritorial | 1998 |
| S.A.B Property Company Limited | Real estate | 2016 |
| S.A.Brain & Company,Limited | Manufacturing | 1897 |
| S.A.C. Textile Company Limited | Professional & scientific | 2008 |
| S.A.M General Cleaning Service Ltd | Administrative & support | 2025 |
| S.A.S. Building Contractors Limited | Construction | 1994 |
| S.A.W Electrical Ltd. | Construction | 2013 |
| S.Andrews & SON (Pwllheli) Limited | Real estate | 1994 |
| S.B Locate Ltd | Hospitality | 2019 |
| S.Chadwick Limited | Administrative & support | 2016 |