| Sjnr Limited | Professional & scientific | 2020 |
| SJS Trading Limited | Manufacturing | 1998 |
| Skillers Workwear Limited | Extraterritorial | 1994 |
| Skills Assessment Services Limited | Education | 2017 |
| Skyline Synergies Limited | Real estate | 2024 |
| Skylink Lifts Ltd | Other services | 2005 |
| SLR Consultancy Services Limited | Professional & scientific | 2017 |
| Slwilson Admin Ltd | Administrative & support | 2022 |
| Smallpage Investments Ltd | Administrative & support | 2008 |
| Smiley Shop Ltd | Wholesale & retail | 2025 |
| Snuggledown Limited | Extraterritorial | 1989 |
| Snuggledown of Norway(Uk)Limited | Extraterritorial | 1970 |
| Sofa Modular Ltd. | Manufacturing | 2022 |
| Solace Strategy Solutions Limited | Administrative & support | 2015 |
| Sophie Thornhill Limited | Financial services | 2015 |
| Sound Steer Limited | Professional & scientific | 2014 |
| South Pennine Boat Club | Arts & recreation | 2025 |
| Sowerby Brothers Cycles Limited | Wholesale & retail | 2002 |
| Spa Procurement Ltd | Professional & scientific | 2023 |
| Sparkle Events Limited | Administrative & support | 2012 |
| Spartan Brooke Limited | Wholesale & retail | 2004 |
| Speedy Creative UK Ltd | Professional & scientific | 2015 |
| Spice of Bengal Ltd | Hospitality | 2022 |
| Splashcrafts Limited | Manufacturing | 2026 |
| Spraytec Property Maintenance Limited | Construction | 2021 |
| Spruzzo Limited | Manufacturing | 2011 |
| SPV Seven Ltd | Real estate | 2025 |
| Squire a Radcliffe & Sons Limited | Manufacturing | 2006 |
| ST Hild College | Education | 1997 |
| Stainland Bess Limited | Energy | 2022 |
| Stanley A.Brown Limited | Extraterritorial | 1965 |
| Stanley Hays Properties Ltd | Real estate | 2022 |
| Starlie Properties Ltd | Real estate | 2017 |
| Station Cars (Dewsbury) Ltd | Other services | 2014 |
| Station Cars (Mirfield) Ltd | Transport & logistics | 2021 |
| Steam Network UK Ltd | Professional & scientific | 2024 |
| Stella CDM Limited | Professional & scientific | 2018 |
| Stella Construction Ltd | Construction | 2022 |
| Stella Datacomms Ltd | Construction | 2024 |
| Stella Electrical Installations Ltd | Construction | 2022 |
| Stella O&M Ltd | Construction | 2024 |
| Stella Power Plants Ltd | Construction | 2022 |
| Stephenacquah Limited | Health & social care | 2018 |
| Sterling Developments (Yorkshire) Limited | Construction | 2021 |
| Steve Pollard Roofing and Building Yorkshire Limited | Construction | 2021 |
| Stocks Housing Ltd | Real estate | 2025 |
| Stocksbank Apartments Management Company Limited | Extraterritorial | 2001 |
| Store Plan Contracts Ltd | Professional & scientific | 2023 |
| Storeplan Interiors Ltd | Professional & scientific | 2025 |
| Stork Technologies Consulting Limited | Professional & scientific | 2022 |
| Street-Wyze Ltd | Education | 2023 |
| Street-Wyze Sports & Youth Engagement Ltd | Education | 2024 |
| Sugarcane Grill & Bar Limited | Hospitality | 2023 |
| Sundaycigars Ltd | Wholesale & retail | 2024 |
| SUP Beer Ltd | Wholesale & retail | 2025 |
| Surface Solutions (Hygienic Wall Cladding) Limited | Construction | 2000 |
| SV Supplies Limited | Wholesale & retail | 2025 |
| Swift Oak Homes Ltd | Real estate | 1997 |
| Swiftcare GP Ltd | Health & social care | 2025 |
| Syntheia Software Ltd | Information & communication | 2026 |
| Tailor-Made I.T. Solutions Ltd | Information & communication | 2003 |
| Tariro UK Trustee Limited | Administrative & support | 2026 |
| Taydev Ltd | Wholesale & retail | 2024 |
| Teazles Ltd | Agriculture & fishing | 2005 |
| Technology for Shared Transport Ltd | Wholesale & retail | 2014 |
| Technoparts Ltd | Manufacturing | 2009 |
| Techserv (North West) Limited | Manufacturing | 1992 |
| Techserv Engineering Services Limited | Manufacturing | 1986 |
| TED Energy Limited | Energy | 2021 |
| Telec Electrical Contractors Limited | Construction | 2015 |
| TFL Property Services Ltd | Construction | 2018 |
| TG Yorkshire Ltd | Manufacturing | 2024 |
| TH Electrical (NW) Ltd | Construction | 2017 |
| THB Consultancy Limited | Information & communication | 2004 |
| THB ERP Solutions Ltd | Information & communication | 2023 |
| THE AL Nawab Limited | Hospitality | 2017 |
| THE Bathing Rooms Limited | Wholesale & retail | 2018 |
| THE Bigger Boat Design and Marketing Ltd | Information & communication | 2009 |
| THE Buyer and Retail Coach Ltd | Administrative & support | 2019 |
| THE Clay Trap Company Wiltshire Ltd | Wholesale & retail | 2024 |
| THE Compass Partnership International Ltd | Professional & scientific | 2016 |
| THE Contract Floor Warehouse Ltd | Wholesale & retail | 2021 |
| THE Cushion Emporium Ltd | Wholesale & retail | 2020 |
| THE Energy Workshop Limited | Professional & scientific | 2002 |
| THE Engine Room Design Co Limited | Information & communication | 2001 |
| THE Farriers (Kiln Lane) Residents Association Limited | Households | 1988 |
| THE Festival Life Store Limited | Arts & recreation | 2014 |
| THE Forensic Psychologist Service (North) Ltd. | Professional & scientific | 2011 |
| THE Forensic Psychologist Service (South) Ltd. | Professional & scientific | 2011 |
| THE Forensic Psychologist Service Ltd. | Professional & scientific | 2011 |
| THE Gym Doctors 365 Limited | Wholesale & retail | 2019 |
| THE Hypertrophy Project Ltd | Education | 2023 |
| THE Joint Clinic Yorkshire Ltd | Public administration | 2026 |
| THE Kept Home Ltd | Administrative & support | 2026 |
| THE Martial Arts Method Ltd | Education | 2023 |
| THE Mirfield Word Ltd | Information & communication | 2014 |
| THE Missing Label Limited | Wholesale & retail | 2013 |
| THE Moorings (Mirfield) Management Limited | Households | 2004 |
| THE Northern Badge Company Ltd | Professional & scientific | 2023 |
| THE Ology Group Limited | Health & social care | 2025 |