| S2TP Ltd | Administrative & support | 2015 |
| Sabai MAI Ltd | Hospitality | 2025 |
| Sabelhook Limited | Financial services | 2015 |
| Sabir ALI Offical Ltd | Wholesale & retail | 2025 |
| Sabiyal Limited | Wholesale & retail | 2025 |
| Sabre Group Limited | Real estate | 1986 |
| Sabre MS Limited | Information & communication | 2016 |
| Sabreen Limited | Wholesale & retail | 2025 |
| Sabretek Solutions Limited | Information & communication | 2009 |
| Sadr Ltd | Information & communication | 2021 |
| Sadr Properties Ltd | Real estate | 2024 |
| Sadr Property Management Ltd | Real estate | 2024 |
| Saend Ltd | Real estate | 2025 |
| Saet Ltd | Real estate | 2019 |
| Safa Style Bags Ltd | Wholesale & retail | 2025 |
| Safe Alternative Provision CIC | Education | 2025 |
| Safe Arbour CIC | Health & social care | 2024 |
| Safe Harbour Consultancy Ltd | Professional & scientific | 2016 |
| Safe Haven Arts & Coffee CIC | Wholesale & retail | 2025 |
| Safe Transportation Ltd | Transport & logistics | 2024 |
| Safebuild Renovations Limited | Construction | 2025 |
| Safescapes Limited | Professional & scientific | 2024 |
| Safetex Medical Solutions Limited | Public administration | 2023 |
| Safety Advisery Services Ltd | Professional & scientific | 2018 |
| Safety First Dorset Electrical Ltd | Construction | 2024 |
| Safety Glass Replacements Limited | Wholesale & retail | 1936 |
| Saffron Homes Limited | Real estate | 1997 |
| Safia Enterprises Ltd | Wholesale & retail | 2021 |
| Safourway Ltd | Wholesale & retail | 2024 |
| Sagebrook Ltd | Wholesale & retail | 2025 |
| Sageight Poole Ltd | Real estate | 2017 |
| Sahashop Ltd | Other services | 2023 |
| SAI Chowdeshwari Group Ltd | Wholesale & retail | 2024 |
| Said Salim Limited | Wholesale & retail | 2025 |
| Sailhome Limited | Households | 1981 |
| Saim Ahmed Ltd | Wholesale & retail | 2025 |
| Saima Begum SEO Ltd | Wholesale & retail | 2025 |
| Saint Okes Limited | Professional & scientific | 2003 |
| Saint Witz Limited | Wholesale & retail | 2018 |
| Saintclinx Ltd | Education | 2011 |
| Saker Horizons Ltd | Public administration | 2026 |
| Salad Creative Limited | Professional & scientific | 2001 |
| Salad Creative Trustees Limited | Other services | 2021 |
| Salamander Ventures Limited | Construction | 2008 |
| Salcombe Country Park Limited | Extraterritorial | 2013 |
| Salenity Ltd | Professional & scientific | 2025 |
| Sales Booster Ltd | Information & communication | 2019 |
| Sales LAB Limited | Information & communication | 2007 |
| Salespod Limited | Professional & scientific | 2014 |
| Salim Said Salim AL Ghafri Limited | Wholesale & retail | 2025 |
| Salisbury Electricals Limited | Construction | 2007 |
| Salisman Consultancy Limited | Real estate | 2016 |
| Sally Maria Consulting Ltd | Construction | 2024 |
| Salmore Property Limited | Construction | 2002 |
| Salsura Nutrition Ltd | Wholesale & retail | 2019 |
| Salt & Pepper Collective Ltd | Professional & scientific | 2026 |
| Salt and Pepper Products Limited | Manufacturing | 2020 |
| Salt Hub Ltd | Professional & scientific | 2016 |
| Salt Management Company Ltd | Households | 2025 |
| Salter Property Holdings Ltd | Real estate | 2026 |
| Salter Tax & Advisory Ltd | Professional & scientific | 2026 |
| Salterns (Block "a") Management Company Limited | Households | 1974 |
| Salterns Court Limited | Households | 1956 |
| Salterns Creative Visuals Ltd | Information & communication | 2024 |
| Salterns DE Lisle Ltd | Real estate | 2023 |
| Salterns Point (a) Co. Ltd | Households | 2003 |
| Salterns Point 2004 Limited | Households | 2004 |
| Salterns Property and Legal Services Limited | Professional & scientific | 2015 |
| Salterns Road Development Limited | Construction | 2021 |
| Salterns Workforce Planning Limited | Administrative & support | 2015 |
| Saltmarsh Park Management Company Limited | Households | 1996 |
| Saltus Systems Ltd | Professional & scientific | 2022 |
| Saltwater Solutions (SWS) Ltd | Manufacturing | 2012 |
| Salvatore Carrubba Ltd | Hospitality | 2022 |
| Salveo Solutions Ltd | Professional & scientific | 2006 |
| Salvitas Consulting Limited | Professional & scientific | 2005 |
| SAM Barr Bookkeeping and Accounting Limited | Professional & scientific | 2021 |
| SAM Broughton Limited | Information & communication | 2018 |
| Sam's Natural Habitat Ltd | Information & communication | 2025 |
| Samantha Charles Associates Limited | Administrative & support | 2026 |
| Sambo Rodizio Poole Ltd | Hospitality | 2022 |
| Sametbaba Ltd | Other services | 2025 |
| Samika Holdings Limited | Financial services | 2018 |
| Sammy on the Side Ltd | Professional & scientific | 2024 |
| Samolon Management Ltd | Professional & scientific | 2021 |
| Samuel Westall Incorporated Limited | Construction | 2023 |
| Samways Surveying Limited | Construction | 2004 |
| Samwell Tooling Limited | Manufacturing | 1994 |
| Samy Tradevisory Ltd | Wholesale & retail | 2025 |
| Sana Mushtaq Ltd | Wholesale & retail | 2022 |
| Sancroft Estates Ltd | Real estate | 2014 |
| Sanctorio Ltd | Wholesale & retail | 2024 |
| Sand Watches Limited | Wholesale & retail | 2025 |
| Sandalex Motors Ltd | Wholesale & retail | 2018 |
| Sandbanks Aesthetics Limited | Other services | 2014 |
| Sandbanks Beach Ltd | Wholesale & retail | 2020 |
| Sandbanks Brewery Limited | Manufacturing | 2018 |
| Sandbanks Building Co Ltd | Construction | 2025 |
| Sandbanks Cinema Rooms Limited | Extraterritorial | 2024 |
| Sandbanks Cleaning Co Limited | Administrative & support | 2025 |