| Sauvetespartiels Ltd | Information & communication | 2025 |
| SAV UK Energy Ltd | Energy | 2018 |
| Savacera Limited | Other services | 2023 |
| Savage & Gray Design Limited | Professional & scientific | 2002 |
| Savage Stone Ltd | Wholesale & retail | 2026 |
| Savage Works Ltd | Manufacturing | 2022 |
| Savana Cakery Ltd | Hospitality | 2019 |
| Savannah Global Estate Ltd | Real estate | 2021 |
| Savannah RAE Construction Ltd | Construction | 2025 |
| Savariya Trade LLP | | 2016 |
| Save & Select Limited | Wholesale & retail | 2018 |
| Save Big Ltd | Wholesale & retail | 2025 |
| Save Money on Vans Ltd | Transport & logistics | 2002 |
| Save Money Transfer Ltd | Information & communication | 2025 |
| SAVE4IT IT Genie Ltd | Wholesale & retail | 2021 |
| Savebox Limited | Other services | 2017 |
| Savemoneycompare.Com Ltd | Financial services | 2010 |
| Savesoul Ltd | Education | 2025 |
| Savibridgetec Ltd | Administrative & support | 2025 |
| Savigny Oddie Limited | Administrative & support | 2004 |
| Savour and Tasty Ltd | Hospitality | 2019 |
| Savun Healthcare Ltd | Health & social care | 2021 |
| Savva Design Limited | Professional & scientific | 2002 |
| Savvy Energy Ltd | Construction | 2023 |
| Savvy Gentleman Ltd | Wholesale & retail | 2018 |
| Savvy Technology Ltd | Other services | 2019 |
| SAW Solutions Group Ltd | Professional & scientific | 2019 |
| SAW4J Limited | Construction | 2023 |
| Sawa Brands Ltd | Wholesale & retail | 2025 |
| Sawa Group Ltd | Other services | 2021 |
| Sawani Dept Ltd | Hospitality | 2026 |
| Sawatdee Thai Therapy Ltd | Other services | 2023 |
| Sawaz Entertainment Ltd | Professional & scientific | 2017 |
| Sawbengold Ltd | Wholesale & retail | 2021 |
| Sawe Hospitality Ltd | Hospitality | 2025 |
| Sawera Global Limited | Wholesale & retail | 2022 |
| Sawma Ltd | Wholesale & retail | 2025 |
| Sawoj Property Investments Ltd | Real estate | 2023 |
| Sawyer Court Residents Limited | Other services | 2005 |
| Saxena Pain Management Limited | Health & social care | 2015 |
| Saxilby Residential Care Home Ltd | Health & social care | 2004 |
| Saxon Building Contractors Limited | Construction | 2019 |
| Saxon Hill Property Limited | Administrative & support | 2017 |
| Saxonsol Limited | Professional & scientific | 2018 |
| SAY IT Ltd | Information & communication | 2019 |
| Sayches Ltd | Information & communication | 2020 |
| Sayers Amusements Limited | Arts & recreation | 2022 |
| Sayers Events Limited | Real estate | 2017 |
| Sayers Properties Limited | Households | 2026 |
| Sayft Bedfordshire Limited | Real estate | 2019 |
| Sayka Ltd | Information & communication | 2025 |
| Sayou & Co Ltd | Other services | 2025 |
| Saytosell Limited | Financial services | 2024 |
| SAZ Cardiff Ltd | Hospitality | 2024 |
| Sazaaa Ltd | Wholesale & retail | 2019 |
| Sazs Properties Ltd | Real estate | 2020 |
| SB Aesthetics Cardiff Ltd | Health & social care | 2025 |
| SB Building Solutions Limited | Construction | 2024 |
| SB Construction Project Consulant Ltd | Construction | 2019 |
| SB Delta Ltd | Wholesale & retail | 2026 |
| SB International Commerce Ltd | Wholesale & retail | 2023 |
| SB Kocak Ltd | Wholesale & retail | 2025 |
| Sbatus Limited | Wholesale & retail | 2024 |
| Sbdisplays Ltd | Administrative & support | 2018 |
| Sbdl Holdings Limited | Financial services | 2024 |
| SBH Smart Construction Ltd | Construction | 2025 |
| Sbha Inc. Limited | Professional & scientific | 2023 |
| Sbhs Properties Ltd | Real estate | 2021 |
| SBJ Consultancy Limited | Health & social care | 2017 |
| Sblp Services Limited | Professional & scientific | 2019 |
| SBN Property Group UK Ltd | Real estate | 2026 |
| Sbox Ltd | Wholesale & retail | 2025 |
| SBR Products Ltd | Administrative & support | 2018 |
| Sbri Limited | Administrative & support | 2001 |
| SBS Business Solutions Ltd | Professional & scientific | 2014 |
| SBS Design & Build Ltd | Construction | 2018 |
| SBS Energy Ltd | Other services | 2019 |
| SBS Trustees Limited | Professional & scientific | 2022 |
| Sbuepm Mart Ltd | Wholesale & retail | 2025 |
| SBW Advertising EOT Limited | Financial services | 2023 |
| SBW Advertising Limited | Professional & scientific | 2004 |
| SC Engineers Ltd | Professional & scientific | 2024 |
| SC Holding Norge Limited | Extraterritorial | 2017 |
| SC Plant and Rail Limited | Construction | 2015 |
| SC Scrap Trade Ltd | Wholesale & retail | 2023 |
| SC Signalling Services Ltd | Construction | 2019 |
| SC Style Ltd | Wholesale & retail | 2026 |
| SC92 Limited | Information & communication | 2022 |
| Scafell Mobile Ltd | Information & communication | 2025 |
| Scaffolding Skys Limited | Construction | 2025 |
| Scaffolding Specialist Services Ltd | Construction | 2011 |
| Scaife Property Investments Ltd | Real estate | 2025 |
| Scalantis Ltd | Information & communication | 2025 |
| Scalar Limited | Administrative & support | 2013 |
| Scale 3D Ltd | Manufacturing | 2022 |
| Scale Corporation Limited | Information & communication | 2017 |
| Scale Estimates Ltd | Information & communication | 2025 |
| Scale Genesis Ltd | Administrative & support | 2021 |
| Scale Lane Ltd | Administrative & support | 2017 |
| Scale Operating Systems Limited | Professional & scientific | 2025 |