| Rustygold Ltd | Arts & recreation | 2025 |
| RX Estates Ltd | Real estate | 2025 |
| RY Fitter's Limited | Construction | 2023 |
| Ryan - Jayberg Limited | Manufacturing | 1986 |
| Rybuild Ltd | Construction | 2015 |
| Rydon Mews Residents Limited | Households | 1999 |
| Rydrains Ltd | Construction | 2015 |
| Ryfold Property Investment Limited | Real estate | 2024 |
| Rygas Limited | Construction | 2011 |
| Rygroup Ltd | Construction | 2020 |
| Ryhomes Developments Limited | Construction | 2012 |
| Ryhomes Ltd | Construction | 2019 |
| Rysparks Ltd | Construction | 2015 |
| Rytrades Ltd | Construction | 2018 |
| S Builders Ltd | Construction | 2010 |
| S Gurunathan Ltd | Health & social care | 2024 |
| S Templar Limited | Construction | 2014 |
| S&J Mall Ltd | Wholesale & retail | 2024 |
| S&M Property Refurbishments Ltd | Construction | 2022 |
| S.S.S Investment Partners Ltd | Real estate | 2025 |
| S2 Design & Contracting (UK) Ltd | Professional & scientific | 2021 |
| SA Collection Limited | Wholesale & retail | 2025 |
| Saas Consulting Ltd | Information & communication | 2025 |
| SAB Lounge Ltd | Hospitality | 2025 |
| Sabale Limited | Information & communication | 2012 |
| Sable and Chalk Ltd | Wholesale & retail | 2025 |
| Sable Court Residents Association Limited | Households | 1970 |
| Sabre Recruitment Services Ltd | Administrative & support | 2025 |
| Sacasa Group Ltd | Real estate | 2023 |
| Sadiq Real Estate Ltd | Real estate | 2025 |
| Safash Limited | Information & communication | 2009 |
| Safe Energy Ltd | Professional & scientific | 2020 |
| Sageight Consulting Ltd | Professional & scientific | 2026 |
| Sageight U5 Ltd | Real estate | 2024 |
| Sageight U6 Ltd | Real estate | 2024 |
| Sageight U8 Ltd | Real estate | 2024 |
| Sahara Swimwear Limited | Wholesale & retail | 2019 |
| Sahr Limited | Other services | 2011 |
| SAI Caterers Limited | Hospitality | 2016 |
| SAI Stratigraphy International Limited | Professional & scientific | 2018 |
| Said Motors Ltd | Wholesale & retail | 2008 |
| Saish Optics Ltd | Health & social care | 2026 |
| SAJ Construction Services Ltd | Construction | 2022 |
| Sala Consulting Ltd | Hospitality | 2022 |
| Salhine Property Services Ltd | Households | 2024 |
| Salter Court Management Limited | Households | 1995 |
| SAM Vision Limited | Manufacturing | 2017 |
| SAM Walker Creative Limited | Professional & scientific | 2024 |
| Sanare K-Delights Ltd | Manufacturing | 2025 |
| Sandal Court Resident's Association Limited(The) | Households | 1965 |
| Sandpitts Residents Limited | Households | 1980 |
| Sanieuro UK Ltd | Wholesale & retail | 2020 |
| Sans Souci Limited | Professional & scientific | 2010 |
| Sansum Solutions Limited | Information & communication | 2017 |
| Sanya Spa Ltd | Other services | 2024 |
| Sapthagiri Ltd | Health & social care | 2015 |
| Sarang K Ltd | Hospitality | 2024 |
| Sash Sidecar LP | | 2020 |
| Sass Investments Ltd | Real estate | 2024 |
| Sasson Limited | Professional & scientific | 2006 |
| Satoama Language Services Limited | Other services | 2012 |
| Savanah Property Ltd | Real estate | 2022 |
| Saveamove Ltd | Transport & logistics | 2019 |
| Saville Assessment Bidco Limited | Financial services | 2023 |
| Saville Assessment Holdings Limited | Financial services | 2023 |
| Saville Assessment Limited | Professional & scientific | 2004 |
| Saville Assessment Midco Limited | Financial services | 2023 |
| Saville Consulting Limited | Extraterritorial | 2008 |
| Savilles Surrey Limited | Other services | 2023 |
| Savvy Capital Ltd | Real estate | 2021 |
| Sawayaka Group Ltd | Hospitality | 2023 |
| Sawtooth Limited | Information & communication | 2006 |
| Says Engineering Ltd | Information & communication | 2014 |
| Sb&S Estates Limited | Real estate | 2023 |
| SBS FAM Ltd | Wholesale & retail | 2024 |
| Scamavert Ltd | Administrative & support | 2025 |
| Scarlett Building Solutions Limited | Construction | 2014 |
| School Principles Limited | Education | 2015 |
| Schoolgate Property Limited | Households | 2024 |
| Scrm Ltd | Information & communication | 2023 |
| SD Batu Ltd | Wholesale & retail | 2016 |
| Seas Records Ltd | Information & communication | 2017 |
| Seatrade Ltd | Transport & logistics | 2015 |
| SEC Site Management Ltd | Construction | 2025 |
| Secureblock Residents Management Limited | Households | 1988 |
| Security Tags Direct Limited | Wholesale & retail | 2009 |
| Sedric Limited | Manufacturing | 2022 |
| Seed Printing Ltd | Manufacturing | 2025 |
| Seeview Graphics Limited | | 1979 |
| Seferi Services Ltd | Construction | 2023 |
| Sejin Trading Ltd | Wholesale & retail | 2017 |
| Selborne Technologies Ltd | Administrative & support | 2013 |
| Selenite Consulting Ltd | Professional & scientific | 2024 |
| Selwyn Evrm Property Group Ltd | Real estate | 2025 |
| Semzo Ltd | Professional & scientific | 2025 |
| SEN Inclusion Solutions Ltd | Education | 2023 |
| Senico Ceylon Limited | Manufacturing | 2025 |
| Senrise Construction Ltd | Construction | 2026 |
| Senta Technology Limited | Information & communication | 1997 |
| Seoul Residential Limited | Real estate | 2012 |