| Stunning Forever Ltd | Other services | 2023 |
| Style & Soar Ltd | Health & social care | 2023 |
| Style Peterborough Ltd | Wholesale & retail | 2018 |
| Stylehome Limited | Wholesale & retail | 2006 |
| Stylehouse Fashion Limited | Wholesale & retail | 2019 |
| Stylewise Homes Limited | Construction | 2021 |
| Stylish Teepees and Picnics Ltd | Hospitality | 2021 |
| Stylisma & Ideal Ltd | Wholesale & retail | 2020 |
| Stylist CM Limited | Other services | 2012 |
| Stylistics Ltd | Other services | 2014 |
| SU Takeaway Ltd | Hospitality | 2026 |
| SUB Sonic Music Publishing Limited | Arts & recreation | 2010 |
| SUB Tranc Ltd | Transport & logistics | 2019 |
| Subby's Sandwich Bar Ltd | Hospitality | 2018 |
| Sublim Hair Dresser Ltd | Other services | 2016 |
| Success Formulae Limited | Other services | 2007 |
| Success Growth Limited | Wholesale & retail | 2020 |
| Success Property Investment Limited | Wholesale & retail | 2019 |
| Succex Innovations Ltd | Wholesale & retail | 2026 |
| SUD Consultancy Ltd | Professional & scientific | 2016 |
| Suffolk Security & Facilities Ltd | Administrative & support | 2025 |
| Sugar Hotels Limited | Hospitality | 2019 |
| Sugar Properties Ltd | Real estate | 2010 |
| Sugar Property Ltd | Real estate | 2022 |
| Sukeetech Ltd | Information & communication | 2025 |
| Sukes PVT Ltd | Hospitality | 2025 |
| Suko White ALL Star Tournament Limited | Arts & recreation | 2025 |
| Sukoon Holdings Limited | Financial services | 2025 |
| Sukowhite Care Ltd | Public administration | 2023 |
| Sulltech Ltd | Professional & scientific | 2022 |
| Sultans Scents Ltd | Wholesale & retail | 2025 |
| Sumaya Ltd | Real estate | 2017 |
| Sumaya Properties Ltd | Real estate | 2024 |
| Sumiton Construction Management Limited | Construction | 2021 |
| Summerdale Financial Contracts Limited | Information & communication | 2005 |
| Summit Capital Ventures Ltd | Real estate | 2025 |
| Sumopol Limited | Wholesale & retail | 2026 |
| Sun & Rose Transport Ltd | Transport & logistics | 2023 |
| Sun International (UK) Ltd | Administrative & support | 1959 |
| Sundas Ltd | Wholesale & retail | 2022 |
| Sunday Enterprise Ltd | Wholesale & retail | 2026 |
| Sundowners Overland Limited | Administrative & support | 2004 |
| Sunergos Partnership Ltd | Professional & scientific | 2020 |
| Sunkings Estate Ltd | Administrative & support | 2008 |
| Sunny Heart Travel Ltd | Administrative & support | 2019 |
| Sunridge Care Services Limited | Health & social care | 2023 |
| Sunrise Driving School Limited | Education | 2025 |
| Sunrise Gardens Management Limited | Real estate | 2018 |
| Sunrise Support Limited | Health & social care | 2026 |
| Sunset TAN Lounge Ltd | Other services | 2025 |
| Sunset to Sunrise Services Limited | Health & social care | 2026 |
| Sunshine Peterborough Laundry Services Ltd | Other services | 2024 |
| Supafish Ltd | Hospitality | 2026 |
| Super Burger & Kebab Ltd | Hospitality | 2024 |
| Super Fine Cakes Ltd | Hospitality | 2024 |
| Super Food Store Ltd | Wholesale & retail | 2019 |
| Super Rigs Limited | Wholesale & retail | 2025 |
| Superfix International Group Limited | Wholesale & retail | 2024 |
| Superfog 2020 Limited | Other services | 2020 |
| Superline UK Ltd | Transport & logistics | 2009 |
| Supermax Healthcare Limited | Manufacturing | 2011 |
| Supermax Vision UK Limited | Wholesale & retail | 2015 |
| Supersede Recruitment Partners Limited | Administrative & support | 2017 |
| Superstoresupplies Ltd | Wholesale & retail | 2022 |
| Supply Source Limited | Other services | 2020 |
| Support Staff Solutions Limited | Administrative & support | 2018 |
| Supporting African Families Transitioning Across Cultures (Aftac) CIC | Education | 2023 |
| Supporting Human Resources Limited | Professional & scientific | 2015 |
| Supreme Bestower Ltd | Wholesale & retail | 2023 |
| Supreme Care Solutions 24 Ltd | Administrative & support | 2022 |
| Supreme Carpentry and Building Ltd | Construction | 2025 |
| Supreme Services PVT Ltd | Professional & scientific | 2016 |
| Suracle Ltd | Information & communication | 2007 |
| Surchii Ltd | Wholesale & retail | 2024 |
| Suredog Ltd | Other services | 2021 |
| Surma Village Limited | Hospitality | 2025 |
| Survr. Ltd | Information & communication | 2025 |
| SUS Attire Ltd | Wholesale & retail | 2023 |
| Susan's Nails Limited | Other services | 2019 |
| Sushi and Salad Ltd | Extraterritorial | 2023 |
| Sushi Salad Properties Limited | Real estate | 2025 |
| Sussex Road Management Company Limited | Households | 2005 |
| Sustainability. Health. Environment. Development. | Education | 2019 |
| Sustainable Energy Technology Ltd | Professional & scientific | 2024 |
| Sutterton Roadside Services Limited | Real estate | 2017 |
| Suzanne Baxter Associates Limited | Professional & scientific | 2012 |
| Suzero Limited | Manufacturing | 2016 |
| SV Ocean Ltd | Wholesale & retail | 2026 |
| SVF Estate Property Development Limited | Construction | 2002 |
| SVF Estate Property Management Limited | Real estate | 2002 |
| SVORCA1955 Ltd | Transport & logistics | 2024 |
| SVS Stores Limited | Wholesale & retail | 2017 |
| Svsn UK Ltd | Real estate | 2023 |
| Svvd Limited | Real estate | 2017 |
| SW Installation Services Ltd | Construction | 2018 |
| SW Leisure Ltd | Other services | 2020 |
| SW TRANSPORT1 Ltd | Transport & logistics | 2015 |
| SW Woodfield Management Consultancy Ltd | Professional & scientific | 2026 |
| SW31 Ltd | Hospitality | 2021 |
| Swaan Motors Ltd | Wholesale & retail | 2022 |