| Squeaky Clean Cleaners Limited | Administrative & support | 2022 |
| Squeaky Neat Cleaning Ltd | Administrative & support | 2026 |
| Squeegee Design Limited | Wholesale & retail | 2008 |
| Squirrelhouse Consulting Ltd. | Information & communication | 2011 |
| Squish and Giggles Limited | Wholesale & retail | 2025 |
| SRF Holdings Limited | Professional & scientific | 2016 |
| SRF Transport Ltd | Transport & logistics | 2018 |
| SRI Pro Limited | Real estate | 2025 |
| Srle Limited | Hospitality | 2019 |
| SRZ Investment Limited | Administrative & support | 2009 |
| SS Omfs Services Ltd | Health & social care | 2021 |
| SS Wilson and Sons Ltd | Real estate | 2021 |
| SS4E Ltd | Professional & scientific | 2012 |
| SS8 Limited | Wholesale & retail | 2019 |
| Ssas Club SPV One Limited | Real estate | 2019 |
| Ssas Club SPV Two Limited | Construction | 2019 |
| Ssas Trustees Ltd | Professional & scientific | 2013 |
| SSG Homes Limited | Construction | 2017 |
| Ssjh Group Ltd | Wholesale & retail | 2020 |
| SSM Business Solutions LLP | | 2017 |
| SSM Investments Leeds Ltd | Real estate | 2021 |
| SSM UK Accountants Ltd | Professional & scientific | 2021 |
| Ssrs Healthcare Ltd | Health & social care | 2023 |
| SSW Composites Ltd | Professional & scientific | 2023 |
| ST Andrewgate Limited | Real estate | 2018 |
| ST Andrews Ridge (Swindon) Management Company Limited | Households | 2016 |
| ST Andrews Trust Bishopthorpe | Administrative & support | 1998 |
| ST Anthonys Court York Management Company Ltd | Real estate | 2021 |
| ST Dunstans Place (Burbage) Management Company Limited | Households | 2015 |
| ST Edeyrns Apartments (Cardiff) RMC Limited | Real estate | 2018 |
| ST Edeyrns Village (Cardiff) Residents Management Company Limited | Households | 2016 |
| ST Edmunds (Frome) Management Company Limited | Households | 2017 |
| ST Energy Limited | Construction | 2018 |
| ST George (Lancaster) Management Company Limited | Households | 2016 |
| ST George Education Ltd | Education | 2024 |
| ST Georges Keep Management Company Limited | Households | 2021 |
| ST Helen's Farm Limited | Manufacturing | 2007 |
| ST James Court (Thirsk) Management Limited | Professional & scientific | 2002 |
| ST James Landscapes Limited | Administrative & support | 2007 |
| ST Johns (Lichfield) Management Company Limited | Households | 2020 |
| ST Johns Court Management (Knaresborough) Limited | Households | 2014 |
| ST Jude's Limited | Wholesale & retail | 1999 |
| ST Katharines Limited | Administrative & support | 2025 |
| ST Katharines Trustees Limited | Professional & scientific | 2023 |
| ST Leger Partnership Limited | Financial services | 2015 |
| ST Marys (York) Management Company Limited | Households | 2002 |
| ST Maurices Court Management Limited | Households | 2006 |
| ST Michaels Place (Colchester) Residents Management Company Limited | Households | 2022 |
| ST Michaels Way (South Ryhope) Residents Management Company Limited | Households | 2022 |
| ST Oswalds Court (Fulford) Management Company Limited | Households | 2001 |
| ST Pauls Court (Yarburgh Grove) Management Limited | Real estate | 2006 |
| ST Peter's School (China) Ltd | Extraterritorial | 2020 |
| ST Peter's School (International) Limited | Administrative & support | 2018 |
| ST Peter's School, York | Education | 2009 |
| ST Peter's Vets Limited | Professional & scientific | 2013 |
| ST Peters Court (Bromsgrove) Management Company Limited | Households | 2002 |
| ST Peters Grove Management Company Limited | Real estate | 2001 |
| ST Peters Place (Salisbury) Management Company Limited | Households | 2016 |
| ST Process Enhancement Limited | Professional & scientific | 2017 |
| ST Raphael JPA Ltd | Hospitality | 2026 |
| ST Sanz Consulting Limited | Education | 2022 |
| ST Ventures Limited | Wholesale & retail | 2023 |
| ST Wilfrid's Court Management Company Limited | Households | 2020 |
| St-David Veterinary Centre Ltd | Extraterritorial | 2010 |
| St-Rs Automotive Ltd | Wholesale & retail | 2024 |
| ST. Andrewgate Management Co. Limited | Real estate | 2000 |
| ST. Clements Care Services Ltd | Other services | 2005 |
| ST. Deny's Court Management Company Limited | Households | 2002 |
| ST. Gregory's Mews Management Company Limited | Extraterritorial | 2001 |
| ST. Leonard's Hospice York | Health & social care | 1979 |
| ST. Mary's Educational Academy Yorkshire Ltd | Administrative & support | 2025 |
| ST. Maurice's House Management Company Limited | Real estate | 1985 |
| ST. Peter's Grove (York) Limited | Real estate | 2010 |
| ST. Peter's Quarter Residents Association Limited | Professional & scientific | 2000 |
| ST. Peter's School Commercial Company | Extraterritorial | 1986 |
| ST. Peter's School Commercial Company 2016 Limited | Education | 2017 |
| ST. Peters Court Management Company Limited | Households | 1982 |
| ST. William's College Enterprises Limited | Administrative & support | 2002 |
| Stable Close Equine Limited | Professional & scientific | 2003 |
| Stable Developments (Whalley) Limited Liability Partnership | | 2009 |
| Stable Rooms Ltd | Hospitality | 2020 |
| Stables Yoga Centre Limited | Arts & recreation | 2014 |
| Stacie Jackson Limited | Professional & scientific | 2015 |
| Stack House Farm LLP | | 2024 |
| Stackchain Ltd | Construction | 2017 |
| Stadium Weekndr Ltd | Administrative & support | 2025 |
| Stage One Group Limited | Manufacturing | 2011 |
| Stage One Hire Limited | Manufacturing | 2015 |
| Stagshaw Energy Limited | Energy | 2013 |
| Stairwell Books Limited | Extraterritorial | 2022 |
| Staithes Fitness Ltd | Arts & recreation | 2026 |
| Staithes Gallery Limited | Arts & recreation | 2016 |
| Stall Speed Aviation Ltd | Manufacturing | 2024 |
| Stamford Bridge Motors Ltd | Manufacturing | 2009 |
| Stamford House Takeaway Ltd | Hospitality | 2019 |
| STAN75 Limited | Administrative & support | 2009 |
| Stanbridge Meadows (Petersfield) Management Company Limited | Households | 2016 |
| Stand Tall PR Ltd | Professional & scientific | 2023 |
| Standards in a Day Ltd | Professional & scientific | 2023 |
| Standeven Fencing Ltd | Construction | 2023 |