| SPL Real Estate Limited | Real estate | 2014 |
| SPM Property Lettings Limited | Real estate | 2021 |
| Spokes Enterprise Ltd | Wholesale & retail | 2026 |
| Spongebobs Car Wash (DN4) Ltd | Other services | 2024 |
| Sponsor Sport GB Ltd | Professional & scientific | 2018 |
| Sport Investment Unit Ltd | Professional & scientific | 2024 |
| Sport Leisure Travel Logistics Limited | Administrative & support | 2026 |
| Sport Profile Limited | Information & communication | 2009 |
| Sporting Simulated Game Limited | Arts & recreation | 2022 |
| Sports Consultants Limited | Arts & recreation | 2007 |
| Sports Technology Holdings Limited | Arts & recreation | 2024 |
| Sportsdesk Limited | Administrative & support | 2026 |
| Spots and Screens Ltd | Manufacturing | 2016 |
| Spotted Bull Customs Ltd | Manufacturing | 2026 |
| SPP Education Ltd. | Administrative & support | 2025 |
| SPR Design Engineering & Maintenance Ltd | Professional & scientific | 2025 |
| Spray Cork UK Ltd | Wholesale & retail | 2024 |
| Spreadlove Ltd | Other services | 2018 |
| Spriggs Developments Limited | Construction | 2023 |
| Springcroft GAS Services Limited | Construction | 2008 |
| Springfield Industrial Ltd | Construction | 2025 |
| Springfield Medical Company Limited | Health & social care | 2013 |
| Springs Camp C.I.C. | Other services | 2023 |
| Springside Property Developments Limited | Construction | 2008 |
| Springwell Car Care (Doncaster) Ltd | Wholesale & retail | 2013 |
| Springwell Car Care Ltd | Wholesale & retail | 2024 |
| Springwell Management Services Ltd | Wholesale & retail | 2020 |
| Springwell Properties (Yorkshire) Limited | Real estate | 2020 |
| Springwoods Bakery Limited | Manufacturing | 2023 |
| Sprotbrough Community Library Ltd. | Arts & recreation | 2012 |
| Sprotbrough Management (Park Drive) Limited | Real estate | 2012 |
| Sprotbrough Properties Ltd | Real estate | 2025 |
| Spry Design Ltd | Information & communication | 2020 |
| SPS Installations Limited | Administrative & support | 2012 |
| SPT Consulting (UK) Limited | Professional & scientific | 2014 |
| SPT Property Services Ltd | Real estate | 2024 |
| SPV Blackpool One Limited | Real estate | 2026 |
| SPV Trinity 84 Limited | Real estate | 2022 |
| SQD FFA Nominees Limited | Financial services | 2026 |
| Squallhurst Limited | | 1981 |
| Square House Limited | Construction | 2013 |
| Square Living Ltd | Households | 2022 |
| Squirrel Associates Ltd | Financial services | 2022 |
| Squiths Real Estate Limited | Real estate | 2024 |
| SR Brand Ltd | Hospitality | 2026 |
| SR Craneworks Ltd | Construction | 2014 |
| SR Legal Services (1) Ltd | Professional & scientific | 2022 |
| SR Safety Engineering Limited | Administrative & support | 2016 |
| Sra-Team Couriers Ltd | Transport & logistics | 2022 |
| SRE Property LP | | 2021 |
| Srikal Limited | Real estate | 2017 |
| SRK Support Ltd | Administrative & support | 2021 |
| SRM (Solutions) Limited | Professional & scientific | 2001 |
| SRS Realisations Limited | Administrative & support | 2011 |
| SS Food and Wine 7 Ltd | Wholesale & retail | 2022 |
| SS Postiche Ltd | Other services | 2018 |
| SSD1 Limited | Real estate | 2023 |
| SSE Industries Limited | Extraterritorial | 2020 |
| SSG Energy Ltd | Real estate | 2024 |
| SSG Rail Ltd | Professional & scientific | 2024 |
| SSG Training Ltd | Education | 2024 |
| SSH Elec Ltd | Energy | 2019 |
| SSJ Engineers Ltd | Professional & scientific | 2023 |
| Ssjk Sales Ltd | Wholesale & retail | 2025 |
| Ssma Doncaster Limited | Education | 2023 |
| SSN Inc Ltd | Real estate | 2021 |
| Ssqs Limited | Professional & scientific | 2005 |
| SSS & Sons Removals Limited | Transport & logistics | 2022 |
| SSS Plumbing & Heating Services Ltd | Construction | 2024 |
| Sstc Ltd | Manufacturing | 2025 |
| Ssultyy Ltd | Transport & logistics | 2024 |
| ST Aidan's Day Nursery Ltd | Health & social care | 2008 |
| ST Andrew's Wealth Management Limited | Financial services | 2010 |
| ST Anne's Hessenford Limited | Households | 2019 |
| ST ANP Services Ltd | Health & social care | 2022 |
| ST Clement Homes Limited | Real estate | 2019 |
| ST Erics Estates Limited | Real estate | 2011 |
| ST James Pound Bargain Ltd | Wholesale & retail | 2025 |
| ST James' Decor Ltd | Construction | 2025 |
| ST Leger BDI Limited | Information & communication | 2007 |
| ST Leger Car Sales Ltd | Wholesale & retail | 2025 |
| ST Leger Contracts Ltd | Construction | 2014 |
| ST Leger Homes of Doncaster Limited | Real estate | 2005 |
| ST Leger PUB Company Ltd | Manufacturing | 2015 |
| ST Mary's Developments Limited | Real estate | 2018 |
| ST Reillys Group Ltd | Hospitality | 2026 |
| ST Wilfrid's Property Ltd | Real estate | 2023 |
| ST. Anne’S Place Estate Management Company Limited Limited | Real estate | 2024 |
| ST. Chads Limited | Wholesale & retail | 2023 |
| ST. Clare's Clothing Ltd | Wholesale & retail | 2026 |
| ST. George Financial Planning Limited | Financial services | 2012 |
| ST. George Trans Limited | Transport & logistics | 2020 |
| ST. Georges (Thorne) Management Company Limited | Households | 2018 |
| ST. Joseph Property Investment Ltd. | Construction | 2023 |
| ST. Leger Properties Limited | Real estate | 2015 |
| STA Home Developments Limited | Real estate | 2018 |
| STA Transport Services Limited | Extraterritorial | 2017 |
| Stablemates Boxing Limited | Arts & recreation | 2026 |
| Stach Trans Ltd | Transport & logistics | 2016 |
| Stacy Puppies Ltd | Agriculture & fishing | 2024 |