| Stamtrad Builders Limited | Construction | 2023 |
| Stan 51 Ltd | Construction | 2026 |
| Stan Parts Ltd | Wholesale & retail | 2024 |
| Stanbridge Residents Company Limited | Households | 2005 |
| Stand in Power Ltd | Education | 2024 |
| Standby Power Solutions Ltd | Manufacturing | 2011 |
| Stang Creative Ltd | Professional & scientific | 2026 |
| Stangaci RO Ltd | Transport & logistics | 2018 |
| Stangeris Ltd | Extraterritorial | 2015 |
| Stanground Autos Limited | Wholesale & retail | 2005 |
| Stanground Carpets & Flooring Ltd | Wholesale & retail | 2012 |
| Stanground Ltd | Administrative & support | 2016 |
| Stanground Marina Management Company Limited | Households | 1989 |
| Stanground Pizza& Kebap Ltd | Hospitality | 2025 |
| Stank Cargo Ltd | Transport & logistics | 2017 |
| Stanley ATC Ltd | Professional & scientific | 2025 |
| Stanley Thomson Limited | Real estate | 2022 |
| Stanmore Crescent Residents Company Limited | Households | 2017 |
| Stanmore Residents Company Limited | Households | 2005 |
| Stanmore Solutions Ltd | Wholesale & retail | 2017 |
| Staplee Way Management Company Limited | Real estate | 2022 |
| Staploe Solicitors LLP | | 2009 |
| Star AL Shira 861 Management Limited | Real estate | 2026 |
| Star AL Shira 861 Property Group Limited | Real estate | 2021 |
| Star Cabz Ltd | Transport & logistics | 2024 |
| Star Chorus Ltd | Arts & recreation | 2024 |
| Star Conan Ltd | Wholesale & retail | 2022 |
| Star Drilling Ltd | Construction | 2009 |
| Star Estate Property Ltd | Real estate | 2024 |
| Star Food Wholesale Ltd | Wholesale & retail | 2021 |
| Star Properties (Peterborough) Limited | Households | 2003 |
| Star Road Ltd | Wholesale & retail | 2025 |
| Star Sandy Beauty Ltd | Other services | 2023 |
| Star Tandoori and Fast Food Ltd | Hospitality | 2024 |
| Star Tandoori Limited | Hospitality | 2025 |
| Star Tech (Cambs) Ltd | Wholesale & retail | 2018 |
| Star Tech 786 Ltd | Wholesale & retail | 2025 |
| Star's Barber Shop Ltd | Other services | 2025 |
| Starbeam Cleaning Services Ltd | Administrative & support | 2026 |
| Starbright Cleaners Limited | Administrative & support | 2024 |
| Starbuck Stone & Masonry Limited | Construction | 2012 |
| Starcups Ltd | Wholesale & retail | 2025 |
| Stark Offroad Fabrications Ltd | Wholesale & retail | 2019 |
| Starline Car Sales Ltd | Wholesale & retail | 2022 |
| Starline Properties Ltd | Real estate | 2023 |
| Starline Recruitment Group Ltd | Administrative & support | 2023 |
| Starline Taxis Stamford Limited | Other services | 2019 |
| Starlink Networks Ltd | Wholesale & retail | 2024 |
| Stars and Sparkles CIC | Health & social care | 2019 |
| Stars Day Nurseries Limited | Health & social care | 2007 |
| Stars Properties Limited | Real estate | 2016 |
| Stars Ventures Ltd | Financial services | 2017 |
| Start UP Catering Equipment Ltd | Wholesale & retail | 2024 |
| STARTANDOORI1990 Limited | Hospitality | 2026 |
| Startel Limited | Other services | 2017 |
| Startext Systems Limited | Real estate | 1993 |
| State Line Ltd | Transport & logistics | 2022 |
| Statesman Inclusive Care Services Limited | Health & social care | 2022 |
| Station Cars Cambs Ltd | Transport & logistics | 2024 |
| Station Express(P'Boro) Ltd | Wholesale & retail | 2019 |
| Station Road Fisheries Ltd | Agriculture & fishing | 2022 |
| Staunch Campaign Ltd | Other services | 2022 |
| Stay Blessed Properties Ltd | Hospitality | 2026 |
| Stay LOW Move Fast Ltd | Transport & logistics | 2015 |
| Stayplayuk Ltd | Professional & scientific | 2021 |
| STB Legal Services Ltd | Professional & scientific | 2009 |
| Steadman & Co Hair Ltd | Other services | 2023 |
| Steam Infusion Ltd | Manufacturing | 2019 |
| Stechford Business Ltd | Wholesale & retail | 2023 |
| Steel 24 Ltd | Manufacturing | 2021 |
| Steele Real Estate Ltd | Professional & scientific | 2020 |
| Steelyard Designs Ltd | Administrative & support | 2018 |
| Steers Motorcycles Limited | Education | 2003 |
| Stef Spedition Ltd | Administrative & support | 2016 |
| Stefaniak Ltd | Transport & logistics | 2026 |
| Stefra Investments Limited | Real estate | 2021 |
| STEFST73 Ltd | Transport & logistics | 2018 |
| Stegan Ltd | Construction | 2019 |
| Steinbari Homes Ltd | Real estate | 2025 |
| Steinel U.K. Limited | Wholesale & retail | 1982 |
| Stella Kebab & Pizza Ltd | Hospitality | 2020 |
| Stellar People Coaching Ltd | Wholesale & retail | 2017 |
| Stellar Sales Ltd | Administrative & support | 2023 |
| Stelloy Ltd | Information & communication | 2019 |
| Stelpha Asset Ltd | Real estate | 2022 |
| Stem Cell Tuition Ltd | Education | 2022 |
| Stemlete Tutoring Ltd | Education | 2025 |
| Step 1 Tenant Referencing Ltd | Administrative & support | 2024 |
| Step UP Retail Limited | Wholesale & retail | 2002 |
| Stepan Diuk Trans Ltd | Transport & logistics | 2025 |
| Steph Norman Limited | Professional & scientific | 2026 |
| Stephanie Sounds Ltd | Information & communication | 2026 |
| Stephen Jackson (Carpentry) Ltd | Construction | 2006 |
| Stephen Jarvis Auto Care Ltd | Wholesale & retail | 2025 |
| Stephen O'Toole Ltd | Information & communication | 2022 |
| Stephen Prendergast Services Ltd | Construction | 2005 |
| Stephenson Smart Financial Services Limited | Financial services | 1999 |
| Stephenson Smart Limited | Professional & scientific | 2004 |
| Stepping-Stone Gelu Limited | Transport & logistics | 2020 |
| Steps and Ladders Limited | Administrative & support | 2024 |