| SAE Property Limited | Real estate | 2013 |
| Safari Swing Limited | Education | 2023 |
| Safe Steel Limited | Construction | 2021 |
| Safe- Space Accessed Facilitating Evolution Ltd | Health & social care | 2018 |
| Safeguard House Ltd | Health & social care | 2024 |
| Safelink Electrical Services Limited | Construction | 1997 |
| Safemove M25 Ltd | Transport & logistics | 2025 |
| Safer Birth Training Ltd | Professional & scientific | 2026 |
| Safer Communities Alliance CIC | Administrative & support | 2020 |
| Safetic International Trading UK Limited | Wholesale & retail | 2025 |
| Saffron Sphere Ltd | Wholesale & retail | 2011 |
| SAG Trans Ltd | Transport & logistics | 2018 |
| Sagay Limited | Professional & scientific | 2013 |
| SAH Sultan London Ltd | Wholesale & retail | 2024 |
| Sahara Trading & Services Limited | Transport & logistics | 2000 |
| Sahib Property Services Limited | Households | 2024 |
| SAI IT Limited | Information & communication | 2012 |
| Saichennure Limited | Real estate | 2020 |
| Sail Street Management Company Limited | Households | 2016 |
| Saini GAS & Electrical Ltd | Manufacturing | 2012 |
| Saini Investments Limited | Real estate | 2016 |
| Saiss Ltd | Hospitality | 2025 |
| Sakaji Limited | Wholesale & retail | 2012 |
| Sakakhu Ltd | Hospitality | 2026 |
| Saks Medical and Cosmetic Limited | Wholesale & retail | 2011 |
| Saldel Property Services Ltd | Real estate | 2020 |
| Sales & Services Ltd | Other services | 2019 |
| Sales Refurbishments Ltd | Construction | 2017 |
| Salire Holdings Ltd | Administrative & support | 2019 |
| Salisbury Mansions Property Limited | Real estate | 2024 |
| Salisbury Mews (Bromley) Limited | Households | 1996 |
| Salisbury Secretaries Limited | Extraterritorial | 2003 |
| Sally Dumbarton Ltd | Administrative & support | 2014 |
| Salt and Slate Social Limited | Hospitality | 2019 |
| Saltans Yachting Ltd | Extraterritorial | 2026 |
| Salters Building Services Ltd | Construction | 2022 |
| Salwa Ibrahim Stress Free Living Ltd. | Health & social care | 2020 |
| Samanvaya Consulting Ltd | Professional & scientific | 2025 |
| Samda Limited | Construction | 2021 |
| Samdee Limited | Arts & recreation | 2007 |
| Sameer & Samar UK Ltd | Wholesale & retail | 2021 |
| Samuel Garside House (Barking) RTM Company Limited | Real estate | 2021 |
| Sana Consultancy Limited | Administrative & support | 2014 |
| Sander GEE Ltd | Other services | 2013 |
| Sanderson Kitchens Limited | Hospitality | 2018 |
| Sanderstead Heights RTM Company Limited | Households | 2011 |
| Sandford Consultants Ltd | Information & communication | 2022 |
| Sandford Management (Bromley) Limited | Households | 2024 |
| Sandford Medico-Legal Limited | Administrative & support | 2024 |
| Sandringham Court (Beckenham) Management Company Limited | Households | 1989 |
| Sandringham Drive Management Company Limited | Households | 2011 |
| Sandringham Hospitality Limited | Hospitality | 2024 |
| Sandringham Real Estate Limited | Construction | 2024 |
| Sandy Lane Residents Association Limited | Households | 1990 |
| Sankofa Music Entertainment Pro Ltd | Manufacturing | 2025 |
| Sankofa Televisual Limited | Information & communication | 2012 |
| Santa School Ltd | Information & communication | 2020 |
| Santhiapillai Investments Ltd | Other services | 2017 |
| Santorini Cafe Ltd | Hospitality | 2025 |
| Santos Networks Ltd | Information & communication | 2025 |
| Santuary Ltd | Health & social care | 2019 |
| Sanu Motors Ltd | Manufacturing | 2011 |
| Sanura Ltd | Construction | 2016 |
| Saola Limited | Wholesale & retail | 2026 |
| SAP (Property) Limited | Real estate | 2016 |
| Sapawa Ltd | Administrative & support | 2014 |
| Sapi Bromley Ltd | Hospitality | 2025 |
| Sapna Sagar Limited | Information & communication | 2016 |
| Sapore Vero Crystal Palace Ltd | Hospitality | 2022 |
| Sapore Vero Hither Green Ltd | Hospitality | 2019 |
| Sapore Vero Holdings Ltd | Real estate | 2022 |
| Sapore Vero Hub Ltd | Hospitality | 2026 |
| Sapore Vero Ltd | Professional & scientific | 2012 |
| Sapore Vero Management Limited | Hospitality | 2013 |
| Sapore Vero on the Road LLP | | 2015 |
| Sapphire Skye Limited | Administrative & support | 2026 |
| Sapphire Trading Limited | Health & social care | 2007 |
| Sapphirepink Events Limited | Administrative & support | 2015 |
| Sarah Buckley Therapies Limited | Health & social care | 2010 |
| Sarah Lewis Limited | Professional & scientific | 2003 |
| Sarah Mccann Global Limited | Professional & scientific | 2026 |
| Saral Marine Ltd | Extraterritorial | 2024 |
| Saran Care Limited | Health & social care | 2023 |
| Sarda House (Freehold) Limited | Households | 2001 |
| Sarda House Management Company Limited | Households | 1999 |
| Sardinia Estate Ltd | Real estate | 2025 |
| Saria Marie Limited | Administrative & support | 2024 |
| Sarpong Maintenance Limited | Professional & scientific | 2018 |
| Sarrs Property Ltd | Real estate | 2026 |
| SAS Fire Protection Ltd | Public administration | 2019 |
| SAS Holding Properties Limited | Real estate | 2021 |
| SAS Venture Group Ltd | Professional & scientific | 2020 |
| Sasha's Singing Stars Academy Ltd | Arts & recreation | 2019 |
| Sasm Holdings Limited | Real estate | 2025 |
| Sasu Construction Limited | Construction | 2020 |
| Satguru Realty Limited | Real estate | 2022 |
| Sathyaa Food and Wine Ltd | Wholesale & retail | 2023 |
| Satos Media Limited | Administrative & support | 2007 |
| Savage Company Holdings Ltd | Real estate | 2025 |
| Savannah-Shaé Richards Limited | Other services | 2021 |