| Staks Pantry Ltd | Wholesale & retail | 2025 |
| Staley Property Group Ltd | Construction | 2026 |
| Stallion Talent Solutions Limited | Information & communication | 2025 |
| Stalwart Enterprises Ltd | Wholesale & retail | 2024 |
| Stampology Ltd | Wholesale & retail | 2022 |
| Stan Taxi Ltd | Transport & logistics | 2025 |
| Stand Accused Ltd | Wholesale & retail | 2021 |
| Stanley Latorre Holdings Limited | Financial services | 2022 |
| Stanley Leasing Ltd | Administrative & support | 2014 |
| Stannard Electrical Services Ltd | Construction | 2022 |
| Stanslea Limited | Other services | 2025 |
| Stansway Limited | Other services | 2024 |
| Stanton Accountancy Ltd | Professional & scientific | 2024 |
| Stanton Holding Limited | Manufacturing | 2005 |
| Stanton Valeting Centre Ltd | Other services | 2012 |
| Stapleford Properties Ltd | Real estate | 2019 |
| Star Case Ltd | Financial services | 2025 |
| Star Nails 68 Ltd | Other services | 2025 |
| Star of ST Louis Limited | Real estate | 2023 |
| Star Shiba Ltd | Extraterritorial | 2024 |
| Star Wing Events Limited | Hospitality | 2023 |
| Star Worldwide Ltd | Wholesale & retail | 2026 |
| Stara Properties Ltd | Real estate | 2024 |
| Starasia Ltd | Real estate | 2018 |
| Starbright Services Ltd | Manufacturing | 2021 |
| Starbyte Technologies Limited | Information & communication | 2025 |
| Starfish Distribution Limited | Hospitality | 2016 |
| Starlight Property Solutions Limited | Administrative & support | 2017 |
| Starline Marine Ltd | Manufacturing | 2024 |
| Starlink Industrial Limited | Wholesale & retail | 2024 |
| Stars Ktbs Ltd | Administrative & support | 2023 |
| Stars London Limited | Wholesale & retail | 2019 |
| Start Build & Grow Limited | Professional & scientific | 2023 |
| Startline Ltd | Arts & recreation | 2025 |
| Startup Employee Trustee Limited | Financial services | 2022 |
| Starun Ltd | Wholesale & retail | 2026 |
| Stategood Limited | Wholesale & retail | 2024 |
| Statement Art Limited | Administrative & support | 2019 |
| Statham Sparkles Auto Detailing Ltd | Administrative & support | 2025 |
| Station Square RTM Company Limited | Households | 2024 |
| Statmed Response Ltd | Health & social care | 2018 |
| Status Print Ltd | Manufacturing | 2024 |
| Stawamus Limited | Information & communication | 2025 |
| Stay Care Homes Ltd | Health & social care | 2019 |
| Stay Vista Ltd | Hospitality | 2025 |
| Staya Properties Ltd | Real estate | 2025 |
| Staymere Limited | Real estate | 2026 |
| Stayprime Ltd | Wholesale & retail | 2023 |
| Stayrelay Limited | Information & communication | 2026 |
| Steady Clothing Ltd | Wholesale & retail | 2025 |
| Steady Finance Holdings Ltd | Financial services | 2026 |
| Steady Stays Ltd | Real estate | 2025 |
| Steel and Timber Ltd | Construction | 2023 |
| Steel Building Installers Ltd | Construction | 2019 |
| Steelcrest Buildings Ltd | Construction | 2024 |
| Steeltech Construction Ltd | Construction | 2021 |
| Steelwork and Welding Limited | Extraterritorial | 2017 |
| Steglakis Ltd | Construction | 2024 |
| Stellajade Trading Ltd | Wholesale & retail | 2026 |
| Stellar Direct Limited | Wholesale & retail | 2023 |
| Stellar Gifts Ltd | Wholesale & retail | 2020 |
| Stellar Memories Ltd | Wholesale & retail | 2025 |
| Stellarism Ltd | Wholesale & retail | 2026 |
| Stemhill Study Limited | Education | 2025 |
| Stentorian Consulting Limited | Professional & scientific | 2014 |
| Stepfar Technology Trading Ltd | Wholesale & retail | 2026 |
| Stephenson Gateway Enterprises Ltd | Real estate | 2017 |
| Stephensons Place RTM Company Ltd | Households | 2026 |
| Stepsand Co Ltd | Construction | 2020 |
| Steriva Labs Ltd | Wholesale & retail | 2026 |
| Sterling & Chase Holdings Ltd | Information & communication | 2025 |
| Sterling Digital Group Ltd | Information & communication | 2025 |
| Sterling House Kitchens Limited | Administrative & support | 2004 |
| Sterling Mare UK Ltd | Wholesale & retail | 2026 |
| Sterling Quest Ltd | Information & communication | 2026 |
| Steroweb Ltd | Professional & scientific | 2024 |
| Stethal C.I.C. | Education | 2026 |
| Steve Logistics Limited | Transport & logistics | 2021 |
| Steve Lorek Development Services Limited | Professional & scientific | 2011 |
| Steve Watson Builders Ltd | Construction | 2016 |
| Steve Wright Photography Ltd | Professional & scientific | 2004 |
| Stevens Court Maintenance Co Limited | Real estate | 1984 |
| Steveray Limited | Real estate | 2024 |
| Stevie Donohoe Racing Limited | Arts & recreation | 2019 |
| STH Services Group Ltd | Administrative & support | 2025 |
| Stickney Meadows Management Company Limited | Real estate | 2018 |
| Stickycath UK Limited | Health & social care | 2016 |
| Stige Limited | Wholesale & retail | 2021 |
| Stilam Limited | Wholesale & retail | 2020 |
| Stilentria Platform Limited | Information & communication | 2026 |
| Still Communities CIC | Health & social care | 2025 |
| Still Group Ltd | Information & communication | 2026 |
| Still Hunt Tech Ltd | Wholesale & retail | 2025 |
| Stirling Construction Limited | Construction | 2014 |
| Stirling Hunter Limited | Professional & scientific | 2019 |
| Stirling Murder Ltd | Arts & recreation | 2023 |
| Stirling Property Services (UK) Ltd | Real estate | 2021 |
| Stitch Craft Graphics & Embroidery Ltd | Wholesale & retail | 2025 |
| STK Entertainment Limited | Construction | 2023 |
| STK Finance Limited | Professional & scientific | 2016 |