| Spoon Group Ltd | Manufacturing | 2009 |
| Sport & Enterprise International Ltd | Wholesale & retail | 2014 |
| Sporting Club Thamesmead Football Club Limited | Arts & recreation | 2017 |
| Sports Choreo GUY Ltd | Arts & recreation | 2024 |
| Sports Recruitment Ltd | Other services | 2023 |
| Sportshub Inc. Ltd | Real estate | 2018 |
| SPP Group Investments Limited | Real estate | 2013 |
| Spring Consultancy Limited | Professional & scientific | 2022 |
| Spring Fresh Cleaning Company Ltd | Administrative & support | 2025 |
| Springforth Properties Ltd | Real estate | 2019 |
| Springs of Life Publishing Limited | Information & communication | 2021 |
| Springtec Consulting Ltd | Information & communication | 2017 |
| Sprinkles Ltd | Manufacturing | 2025 |
| Sprint Milestone Ltd | Information & communication | 2025 |
| Spruce Consults Limited | Professional & scientific | 2016 |
| SQ Construction Limited | Construction | 2006 |
| Square Mile Innovations Limited | Information & communication | 2014 |
| Square PEG Digital Ltd | Information & communication | 2011 |
| Squirrels Leap Limited | Real estate | 2020 |
| SR & L Homes Limited | Real estate | 2022 |
| SR & L Solutions Limited | Information & communication | 2016 |
| SRC Catering Services Ltd | Manufacturing | 2020 |
| Sreesoft Solutions Limited | Information & communication | 2013 |
| SRG Consulting Ltd | Information & communication | 2019 |
| SRG Global Advisors Limited | Professional & scientific | 2026 |
| SRI Krishna Holdings Limited | Real estate | 2022 |
| SRI Lakshmanakrishna Ltd | Information & communication | 2013 |
| SRI SUVARNA01 Ltd | Real estate | 2025 |
| SRM Consultancy Limited | Professional & scientific | 2025 |
| SRM Estates Limited | Real estate | 2025 |
| SS Food & Liquor Limited | Wholesale & retail | 2025 |
| SS Makeup Ltd | Professional & scientific | 2023 |
| SS Sahota Limited | Construction | 2025 |
| SSJ Management Ltd | Real estate | 2021 |
| SSS Mart Ltd | Wholesale & retail | 2025 |
| SSS Partnership Limited | Professional & scientific | 2023 |
| ST Aubyns Consulting Limited | Professional & scientific | 2022 |
| ST Jules Limited | Professional & scientific | 2013 |
| ST Peter and ST Paul Catholic Primary Academy | Education | 2014 |
| ST Philomena's Catholic Primary School | Education | 2014 |
| ST. Andrews House Management Company Limited | Households | 2012 |
| ST. James Leisure Limited | Arts & recreation | 1995 |
| ST. James’ R.C. Primary School | Education | 2012 |
| ST. Mary Cray Residents Company Limited | Households | 1987 |
| ST. Peters Court SE12 RTM Company Limited | Households | 2016 |
| Stables Yard Management (Beckenham) Ltd | Households | 2022 |
| Staceys Beauty Clinic Ltd | Other services | 2018 |
| Stage Door Bromley Ltd | Wholesale & retail | 2017 |
| Stagg Architects Limited | Professional & scientific | 2011 |
| Stair Tread Holdings Limited | Financial services | 2008 |
| Stair Tread Investments Limited | Professional & scientific | 2003 |
| Stakhanovite Investments Limited | Financial services | 2023 |
| Stand UP to Woke Limited | Arts & recreation | 2021 |
| Standard Art Ltd | Financial services | 2025 |
| Stanley's Wine Bar Limited | Hospitality | 2025 |
| Stanmore Modular Limited | Extraterritorial | 2016 |
| Stanmore Steel Limited | Manufacturing | 2013 |
| Stanton Management Consultants Ltd | Professional & scientific | 2014 |
| Staple Dairy Products Limited | Wholesale & retail | 1985 |
| Staple Food Group EOT Ltd | Financial services | 2023 |
| Staple Food Group Ltd | Wholesale & retail | 2018 |
| Stapleburn Ltd | Hospitality | 2001 |
| Star 1 Ltd | Administrative & support | 2022 |
| Star Blue Plumbing Building Garden Services Limited | Construction | 2025 |
| Stardent Clinic Limited | Health & social care | 2024 |
| Starfish & Coco Limited | Wholesale & retail | 2013 |
| Stark Collective Limited | Professional & scientific | 2021 |
| Starling Security Limited | Administrative & support | 2001 |
| Starrcon Limited | Construction | 2019 |
| Stars Build Limited | Construction | 2023 |
| Stars Global Ltd | Wholesale & retail | 2024 |
| Stat Global Ltd | Administrative & support | 2017 |
| Station Approach Property Limited | Real estate | 2018 |
| Stay on Track Training Ltd | Education | 2011 |
| Stealth Vehicle Security Limited | Wholesale & retail | 2025 |
| Stebles Bikes Limited | Manufacturing | 2012 |
| Stedfast Services Limited | Administrative & support | 2015 |
| Stellar Assets Limited | Real estate | 2021 |
| Stellarventure Properties Ltd | Real estate | 2024 |
| Stellivest Limited | Financial services | 2024 |
| Stem Labs Ltd | Education | 2023 |
| Step & Co Developments Ltd | Construction | 2023 |
| Steph and Steph Limited | Real estate | 2017 |
| Stephen Berry Civil & Structural Services Limited | Professional & scientific | 2025 |
| Stephen Friedman Fine Art Limited | Wholesale & retail | 1995 |
| Stephen Property Group Limited | Real estate | 2023 |
| Stephen Spurr Consulting Limited | Education | 2019 |
| STEPS4SUCCESS Limited | Professional & scientific | 2005 |
| Stepwise Solutions Limited | Information & communication | 2026 |
| Sterling Eagle Limited | Education | 2019 |
| Sterling Floors Ltd | Construction | 2014 |
| Sterling IM Limited | Financial services | 2009 |
| Sterling Investment Management Limited | Administrative & support | 2020 |
| Sterling Investments Management Limited | Financial services | 2017 |
| Steve Jones Television Limited | Information & communication | 2018 |
| Steve Leahey Education Consultancy Ltd | Education | 2022 |
| Steve Mccann Consulting Limited | Administrative & support | 2017 |
| Stewart Risk Solutions Ltd | Administrative & support | 2017 |
| Stichedupembroidery Ltd | Manufacturing | 2026 |
| Stock Development Services Limited | Construction | 2023 |