| SRA SRA Limited | Professional & scientific | 2020 |
| SRB Holdings Limited | Wholesale & retail | 2015 |
| SRC Installations Peterborough Limited | Construction | 2012 |
| Sreesha Ltd | Information & communication | 2017 |
| SRI Logistics Limited | Transport & logistics | 2024 |
| Srisan Practice Limited | Other services | 2016 |
| Sriuche Limited | Other services | 2020 |
| SRK Accommodation Ltd | Hospitality | 2019 |
| SRK Residential Ltd | Real estate | 2021 |
| SRL Academy Ltd | Construction | 2018 |
| SRM Property Holdings Ltd | Real estate | 2025 |
| Srnj Traders Ltd | Wholesale & retail | 2025 |
| SRO Innovate Limited | Professional & scientific | 2022 |
| Srrk Ltd | Wholesale & retail | 2025 |
| SRX Pharma Ltd | Wholesale & retail | 2023 |
| SS Accountants Ltd | Professional & scientific | 2020 |
| SS Bodyshop Ltd | Wholesale & retail | 2024 |
| SS Digital Ltd | Information & communication | 2026 |
| SS Fabrication Limited | Manufacturing | 2020 |
| SS Financial Consultants Ltd | Professional & scientific | 2022 |
| SS Graphics Limited | Administrative & support | 2019 |
| SS H2O Plumbing & Heating Services Ltd | Construction | 2016 |
| SS Integrations Ltd | Information & communication | 2021 |
| SS Property Law Ltd | Professional & scientific | 2025 |
| SS Psychiatric Services Ltd | Health & social care | 2016 |
| SS Techsoft Limited | Information & communication | 2014 |
| SSA Capital Ltd | Real estate | 2024 |
| SSC Engineering Limited | Manufacturing | 2017 |
| SSG Installations Ltd | Construction | 2022 |
| Ssga Enterprises Ltd | Construction | 2019 |
| Ssgg Property Management Ltd | Real estate | 2023 |
| SSI Delivery Ltd | Transport & logistics | 2021 |
| SSK Motor Sales Ltd | Wholesale & retail | 2024 |
| Sslp Ltd | Real estate | 2024 |
| SSR Installations Limited | Construction | 2017 |
| ST Athan Residents Company Limited | Households | 1998 |
| ST Carz Ltd | Wholesale & retail | 2019 |
| ST Catherine's Dental Grantham Limited | Health & social care | 2019 |
| ST Clerance (Peterborough) Ltd | Administrative & support | 2019 |
| ST Columb Minor Residents Company Limited | Households | 2010 |
| ST Complete Care Ltd | Health & social care | 2019 |
| ST Eval Parc Residents Company Limited | Households | 2000 |
| ST Ives Sushi Limited | Hospitality | 2024 |
| ST James Accounting Limited | Professional & scientific | 2003 |
| ST James House (Peterborough) Ltd | Households | 2013 |
| ST John the Baptist (Peterborough) Development C.I.C. | Other services | 2011 |
| ST Kyneburgha Building Preservation Trust | Arts & recreation | 2000 |
| ST Martin's Advisory Services Ltd | Financial services | 2021 |
| ST Marys Chase (Stanton Under Bardon) Residents Management Company Limited | Households | 2026 |
| ST Michael's Chambers Ltd | Professional & scientific | 2026 |
| ST Michael's Food Ltd | Hospitality | 2013 |
| ST Nicholas Avenue Residents Company Limited | Households | 2001 |
| ST Peters Road Homes Ltd | Construction | 2025 |
| ST Properties NW Ltd | Real estate | 2024 |
| ST Transport Solutions Ltd | Transport & logistics | 2016 |
| ST. Christopher's Place Management Company Limited | Households | 2002 |
| ST. Edmunds Willwriting Service Ltd | Professional & scientific | 2003 |
| ST. John's Flats Management Company (1993) Limited | Real estate | 1993 |
| ST. Mark's Court Management Company Limited | Households | 1993 |
| ST. Mary's Education Centre (Primary) Ltd | Education | 2019 |
| ST. Mary's Educational Academy Ltd | Administrative & support | 2016 |
| ST. Mary's Property Ltd | Real estate | 2020 |
| ST. Mary's Travels Ltd | Transport & logistics | 2019 |
| Stable Tower Limited | Financial services | 2024 |
| Stacey Bell Property Law Consulting Limited | Professional & scientific | 2021 |
| Stack Capital Limited | Real estate | 2018 |
| Stacks - Rutland Ltd | Administrative & support | 2018 |
| Stackyard Close Management Company Limited | Households | 2011 |
| Staff Perfect UK Ltd | Transport & logistics | 2024 |
| Staff Recruitment Link Ltd | Administrative & support | 2021 |
| Staff Right Ltd | Administrative & support | 2017 |
| Staffing Soloutions Ltd | Professional & scientific | 2024 |
| Stag Commercial Group Ltd | Real estate | 2022 |
| Staiman Food&Grill Limited | Hospitality | 2025 |
| Stallion Essentials Ltd | Wholesale & retail | 2023 |
| Stamford (Anvil Mews) Management Company Limited | Households | 2015 |
| Stamford Agentic Ltd | Information & communication | 2025 |
| Stamford Audio Limited | Wholesale & retail | 2006 |
| Stamford Bespoke Bathrooms Ltd | Construction | 2025 |
| Stamford College Old Boys Rugby Union Football Club Limited | Arts & recreation | 2024 |
| Stamford Country Developments Limited | Construction | 2024 |
| Stamford Demolition and Building Ltd | Water & waste | 2018 |
| Stamford Eats Ltd | Information & communication | 2024 |
| Stamford Elite Transfers Ltd | Transport & logistics | 2024 |
| Stamford Garden Studios and Landscaping Ltd | Administrative & support | 2025 |
| Stamford GAS Services Limited | Construction | 2017 |
| Stamford Gymnastics Club Ltd | Education | 2022 |
| Stamford Miller Ltd | Administrative & support | 2018 |
| Stamford Properties Development Ltd | Real estate | 2023 |
| Stamford Property(Services) Ltd | Extraterritorial | 2010 |
| Stamford Shoestring Theatre Company Limited | Arts & recreation | 2017 |
| Stamford Stone Construction Ltd | Construction | 2019 |
| Stamford Stone Holdings Limited | Financial services | 2017 |
| Stamford Stonework & Construction Ltd | Construction | 2025 |
| Stamford Storage (HG) Limited | Transport & logistics | 2013 |
| Stamford Welding Services Ltd | Manufacturing | 2018 |
| Stamford YF Property Limited | Real estate | 2017 |
| Stamford Yoga Limited | Health & social care | 2014 |
| Stamfordian (Construction) Ltd | Construction | 2019 |
| Stamtech Ltd | Financial services | 2025 |