| S a MAJ Ltd | Real estate | 2024 |
| S a Whittaker Holdings Ltd | Real estate | 2023 |
| S and D Driveways (Yorkshire) Limited | Construction | 2024 |
| S and J Shaw Engineering Limited | Real estate | 1981 |
| S Azam Consulting Limited | Information & communication | 2025 |
| S Barn Ltd | Extraterritorial | 2020 |
| S Corbett Ltd | Construction | 2014 |
| S D J Developments Limited | Construction | 2020 |
| S Dakin Limited | Professional & scientific | 2015 |
| S E K Properties 1 Limited | Real estate | 2020 |
| S E K Properties 2 Limited | Real estate | 2020 |
| S G Fordham Joinery Ltd | Construction | 2003 |
| S G Turner Consulting Ltd | Professional & scientific | 2025 |
| S Gaughan Landscapes Limited | Administrative & support | 2013 |
| S Horseman Recruitment Limited | Administrative & support | 2025 |
| S Hughes Transport Ltd | Transport & logistics | 2015 |
| S J Consulting Limited | Administrative & support | 2023 |
| S J Naylor Logistics Limited | Transport & logistics | 2010 |
| S J Properties (Doncaster) Ltd | Real estate | 2022 |
| S K Fuel Limited | Wholesale & retail | 2007 |
| S K Houses 430 Ltd | Real estate | 2021 |
| S Littlehales GAS Services Limited | Real estate | 2004 |
| S M Building and Property Maintenance Limited | Construction | 2003 |
| S Miller TM Ltd | Public administration | 2024 |
| S N J Developments Ltd | Construction | 2021 |
| S Otoibhi Limited | Health & social care | 2013 |
| S P Atkinson Ltd | Construction | 2014 |
| S Pawson TM Ltd | Public administration | 2025 |
| S Sarari Builders Ltd | Construction | 2025 |
| S Staniforth TM Ltd | Public administration | 2024 |
| S V Dance Studios Ltd | Arts & recreation | 2012 |
| S W J Rentals Ltd | Transport & logistics | 2022 |
| S Warnes Joinery Ltd | Construction | 2025 |
| S Wilson Transport Ltd | Transport & logistics | 2020 |
| S&A Barber Salon Ltd | Other services | 2025 |
| S&D MOT Centre Ltd | Wholesale & retail | 2022 |
| S&D Roofing Services Limited | Construction | 2023 |
| S&D Transmissions Limited | Wholesale & retail | 2010 |
| S&F Financial Services Ltd | Financial services | 2023 |
| S&G Compounding Ltd | Professional & scientific | 2025 |
| S&J Elliott Consultancy Ltd | Professional & scientific | 2024 |
| S&J Recruitment Ltd | Administrative & support | 2023 |
| S&M Logistics Ltd | Transport & logistics | 2026 |
| S&N Plus Limited | Transport & logistics | 2024 |
| S&R Investment Group Limited | Real estate | 2025 |
| S&S Family Holdings Ltd | Real estate | 2022 |
| S&S Grimsby Limited | Administrative & support | 2020 |
| S&S Properties Doncaster Ltd | Real estate | 2026 |
| S&U Distribution Ltd | Transport & logistics | 2018 |
| S-Squared Consultant Limited | Information & communication | 2023 |
| S. Jenkinson and Sons Limited | Construction | 1983 |
| S. Morgan Engineering Ltd | Professional & scientific | 2012 |
| S. P. Davis Memorials Limited | Manufacturing | 2005 |
| S. Suleman Ltd | Health & social care | 2015 |
| S. Tasker Plumbing & Heating Ltd | Construction | 2023 |
| S. Thorpe Groundworks Limited | Construction | 2004 |
| S.A. Blackmore Limited | Transport & logistics | 1952 |
| S.A. GAS Heating&Plumbing Ltd | Construction | 2025 |
| S.C Sports Surfaces Limited | Construction | 2008 |
| S.E.S. Holdings (UK) Limited | Professional & scientific | 2004 |
| S.F.I.S Ltd | Other services | 2009 |
| S.G Fire Protection Ltd | Construction | 2020 |
| S.J. Adams Painting & Decorating Limited | Construction | 2003 |
| S.K. Tax Service Ltd | Professional & scientific | 2001 |
| S.M.K Construction Services (Yorkshire) Limited | Real estate | 2013 |
| S.T.L. Assets Holdings Limited | Financial services | 2024 |
| S.T.L. Assets Limited | Financial services | 2022 |
| S.T.L. Trading Company Limited | Wholesale & retail | 2004 |
| S.T.L. Trading Holdings Limited | Financial services | 2024 |
| S.Y.S. (Scaffolding Contractors) Ltd | Construction | 1986 |
| S15 HR Services Limited | Administrative & support | 2012 |
| S1MMM0UK Ltd | Manufacturing | 2014 |
| S24TRAVEL Limited | Transport & logistics | 2022 |
| S26 Pizza Limited | Hospitality | 2025 |
| S36 Takeout Ltd | Hospitality | 2026 |
| S3I Ltd | Manufacturing | 2003 |
| S417SH Ltd | Construction | 2025 |
| S4ALL Ltd | Education | 2005 |
| SA 20/20 Ltd | Health & social care | 2020 |
| SA Fashion & Traders Ltd | Wholesale & retail | 2024 |
| SA Land Developments Ltd | Other services | 2022 |
| SA Logistics INT Limited | Transport & logistics | 2025 |
| SA Marfa Import Export LLP | | 2024 |
| SA Property Invest Limited | Real estate | 2020 |
| SA4U Ltd | Professional & scientific | 2025 |
| Saadh Limited | Health & social care | 2024 |
| Saahi Foods Ltd | Hospitality | 2025 |
| Saap Creative Ltd | Professional & scientific | 2025 |
| Saarathi Ltd | Wholesale & retail | 2025 |
| Saathvik Fish Bar Ltd | Hospitality | 2025 |
| Sabana Clothing Ltd | Wholesale & retail | 2026 |
| Sabar Developments Limited | Construction | 2023 |
| Saben Auto Limited | Wholesale & retail | 2019 |
| Saben Group Properties Ltd | Real estate | 2026 |
| Sabi Convenience Store Ltd | Wholesale & retail | 2025 |
| Sabre-Tek Limited | Professional & scientific | 2025 |
| Sabs Logistics Ltd | Financial services | 2024 |
| SAC Logistics Ltd | Transport & logistics | 2026 |
| Sacred Self Collective Ltd | Health & social care | 2026 |
| Saddlers Way Management Company Limited | Households | 2000 |