| Sssa Investment Limited | Real estate | 2024 |
| ST Andrews Caravan Hire Limited | Hospitality | 2023 |
| ST Andrews Travel Limited | Administrative & support | 2013 |
| ST Ann's Road (Regency Lodge) Management Company Limited | Households | 2007 |
| ST Catherine's RTM Company Limited | Real estate | 2010 |
| ST George's Day Centre (Bolton) Ltd | Health & social care | 2006 |
| ST Georges Group Ltd | Financial services | 2017 |
| ST Georges Piccadilly Ltd | Real estate | 2018 |
| ST Georges Rehab Services Limited | Health & social care | 2015 |
| ST Georges Services Ltd | Financial services | 2016 |
| ST Helens Road Valeting Centre Limited | Administrative & support | 2025 |
| ST Helens Waste Recycling Ltd | Water & waste | 2008 |
| ST Laserstrike Limited | Manufacturing | 2016 |
| ST Mary's Children's Home Limited | Health & social care | 2023 |
| ST Michaels Construction Ltd | Construction | 2021 |
| ST Quality Consultants Ltd | Professional & scientific | 2024 |
| St&G Holdings Ltd | Financial services | 2025 |
| ST. Bede's Childcare Limited | Education | 2006 |
| ST. Brendan's PRE School Nursery Ltd | Health & social care | 2024 |
| ST. Helens Skip Hire Limited | Administrative & support | 2012 |
| ST. Louis Group UK Ltd | Wholesale & retail | 2026 |
| ST4RSWEETS Limited | Wholesale & retail | 2026 |
| STA Chinar Ltd | Health & social care | 2024 |
| STA Lettings Ltd | Real estate | 2020 |
| Stabilitas Property Limited | Households | 2023 |
| Stable Computing Ltd | Information & communication | 2021 |
| Stabler Apps Ltd | Information & communication | 2026 |
| Stacey Jones Ltd | Financial services | 2017 |
| Stachow Ltd | Information & communication | 2016 |
| Stackify Ltd | Information & communication | 2026 |
| Stacksuits Ltd | Wholesale & retail | 2025 |
| Stadz Limited | Professional & scientific | 2017 |
| Staff 247 People Solutions Limited | Administrative & support | 2017 |
| Stafford Holdings Limited | Real estate | 1994 |
| Stafford Propco Care Limited | Real estate | 2022 |
| Stafford Propco SL Limited | Real estate | 2022 |
| Staffx Group Limited | Professional & scientific | 2022 |
| Stafm Ltd | Public administration | 2025 |
| Stage 360 Limited | Extraterritorial | 2015 |
| Stage Events Limited | Hospitality | 2016 |
| Stage Property Refurbishments Limited | Construction | 2021 |
| Stagic Ltd | Information & communication | 2020 |
| Stagmont Property Ltd | Real estate | 2026 |
| Stained Leaded Glass Company Limited | Manufacturing | 2013 |
| Stainless Steel Cavity Trays Limited | Construction | 2019 |
| Stairs Made Easy Limited | Construction | 2009 |
| Stakester Limited | Other services | 2019 |
| Stakpan Engineering Limited | | 1977 |
| Stallion Payroll Services Limited | Financial services | 2020 |
| Stan Electronics Ltd | Wholesale & retail | 2017 |
| Stancu.A Ltd | Transport & logistics | 2025 |
| Stand Firm Ltd | Arts & recreation | 2025 |
| Stand OUT UK Dance Limited | Extraterritorial | 2016 |
| Stand UP Sisters CIC | Education | 2020 |
| Standard and Mantle Limited | Financial services | 2023 |
| Standard Scaffolding Specialists Limited | Construction | 1986 |
| Standerwick's Ltd | Real estate | 1944 |
| Standing Properties Ltd | Real estate | 2021 |
| Standishgate Management Company RTM Company Limited | Households | 2008 |
| Standrings Financial Planning Limited | Financial services | 2010 |
| Stanley House Barristers Limited | Professional & scientific | 2026 |
| Stanley House Chambers Ltd | Professional & scientific | 2026 |
| Stanley House Solicitors Ltd | Professional & scientific | 2014 |
| Stanley IT Services Limited | Information & communication | 2022 |
| Stanley Langley (Holdings) Limited | Professional & scientific | 1981 |
| Stanley Latorre Property Ltd | Real estate | 2025 |
| Stanley Social Capital Ltd | Professional & scientific | 2020 |
| Stanmore Group Limited | Financial services | 2015 |
| Stanmore Insurance Brokers Limited | Financial services | 1962 |
| Stanrose Developments Limited | Construction | 2018 |
| Stanrose Holdings Limited | Construction | 2020 |
| Stanrose Investments Limited | Real estate | 2021 |
| Stansfield Associates Limited | Professional & scientific | 2016 |
| Stanza Group Holdings Limited | Financial services | 2019 |
| Stanza Italiano Ltd | Hospitality | 2019 |
| Stanza Limited | Construction | 2015 |
| Star Accomodations Limited | Real estate | 2024 |
| Star Builders Manchester Ltd | Real estate | 2025 |
| Star Cars Bolton Limited | Transport & logistics | 2019 |
| Star Design & Build Ltd | Construction | 2019 |
| Star Dunes Ltd | Wholesale & retail | 2025 |
| Star Mobile and Vape Ltd | Wholesale & retail | 2023 |
| Star Mobile X Vape Ltd | Wholesale & retail | 2025 |
| Star Motor Parts Ltd | Wholesale & retail | 2020 |
| Star Motors Ltd | Wholesale & retail | 2019 |
| Star One Transport Ltd | Transport & logistics | 2025 |
| Star Private Hire Limited | Information & communication | 1992 |
| Star Reborn Ltd | Manufacturing | 2023 |
| Star Turn Tuition Limited | Education | 2018 |
| Star Tyres & Detailing Limited | Wholesale & retail | 2025 |
| Star Westhoughton Ltd | Transport & logistics | 2025 |
| Staremandy Ltd | Transport & logistics | 2019 |
| Starkeelife Ltd | Wholesale & retail | 2025 |
| Starlight 3 Ltd | Professional & scientific | 2022 |
| Starlight Interiors Limited | Financial services | 2018 |
| Starling Environmental Limited | Professional & scientific | 2023 |
| Starling Fire Limited | Public administration | 2018 |
| Starling Property Management Ltd | Real estate | 2024 |
| Starlink Tour Ltd | Administrative & support | 2024 |
| Starlink Travel Limited | Wholesale & retail | 2023 |