| Sunbed Hire Limited | Other services | 2011 |
| Suncoast Yachting Europe Limited | Other services | 2002 |
| Suncoast Yachting Holland Limited | Manufacturing | 2003 |
| Sundown Management Services Ltd | Professional & scientific | 2025 |
| Sunex Limited | Extraterritorial | 2022 |
| Sunkissed TAN Studio Ltd | Other services | 2026 |
| Sunlight Recruitment Services Ltd | Administrative & support | 2011 |
| Sunlight Transport and Drink Ltd | Transport & logistics | 2025 |
| Sunlink Renewables Ltd | Professional & scientific | 2024 |
| Sunnah Steps Ltd | Education | 2024 |
| Sunny Donny Limited | Other services | 2019 |
| Sunny Side Management & Consultancy Limited | Professional & scientific | 2025 |
| Sunny Skies Academy Ltd | Health & social care | 2024 |
| Sunny Smart UK Limited | Administrative & support | 2011 |
| Sunny Stays Ltd | Hospitality | 2023 |
| Sunnydale Alpacas Limited | Agriculture & fishing | 2005 |
| Sunnydene Holiday Park Limited | Hospitality | 2020 |
| Sunnydene Park (East Yorkshire) Limited | Construction | 2021 |
| Sunnyifed Medics Ltd | Health & social care | 2020 |
| Sunnyifed Private Ltd | Real estate | 2021 |
| Sunnyside Forestry Services Limited | Agriculture & fishing | 2014 |
| Sunnysprout Ltd | Extraterritorial | 2025 |
| Sunnyview Park Homes Limited | Hospitality | 2019 |
| Sunrise Tanning Studio Ltd | Other services | 2019 |
| Sunway Ventures Ltd | Wholesale & retail | 2025 |
| SUO Media Limited | Manufacturing | 2018 |
| Supa 007 Limited | Transport & logistics | 2025 |
| Supagrow Limited | Wholesale & retail | 2021 |
| Supanova Studios Ltd | Information & communication | 2021 |
| Supasave Convenience Store Ltd | Wholesale & retail | 2021 |
| Supay UK Ltd | Administrative & support | 2024 |
| Super Fryer 7 Ltd | Hospitality | 2022 |
| Super Savings Store Limited | Wholesale & retail | 2024 |
| Super Surveys Ltd | Professional & scientific | 2026 |
| Superhand Carclean Ltd | Administrative & support | 2022 |
| Superior Parks Limited | Construction | 2025 |
| Supernova Group Holdings Ltd | Real estate | 2023 |
| Supernova Sports Management Ltd | Arts & recreation | 2023 |
| Supersauna Ltd | Wholesale & retail | 2025 |
| Supovita Ltd | Manufacturing | 2024 |
| Suppa Holding Limited | Financial services | 2023 |
| Suppleman Ltd | Health & social care | 2018 |
| Supplementary Health Limited | Information & communication | 2024 |
| Supplies Party Ltd | Administrative & support | 2015 |
| Supporium Services Ltd | Administrative & support | 2025 |
| Support Infra Ltd | Transport & logistics | 2026 |
| Support Suite Ltd | Administrative & support | 2025 |
| Supreme Builds Construction Ltd | Construction | 2026 |
| Supreme Casa Limited | Real estate | 2022 |
| Supreme Rendering Services Limited | Construction | 2024 |
| Sure Clean Limited | Financial services | 2017 |
| Sure Home Buyers Ltd | Real estate | 2025 |
| Sure Sleep Beds Ltd | Wholesale & retail | 2013 |
| Surecare (Doncaster) Ltd | Health & social care | 2008 |
| Surefit Carpets Limited | Wholesale & retail | 2003 |
| Surefit Properties Limited | Real estate | 2011 |
| Surefoot Brickwork Ltd | Construction | 2025 |
| Sureguk Ltd | Wholesale & retail | 2025 |
| Surepath Transport Limited | Transport & logistics | 2025 |
| Suresafe GAS Services Ltd | Construction | 2019 |
| Sureseal Flat Roofing Ltd | Construction | 2024 |
| Surface Specialists Ltd | Construction | 2026 |
| Surfsafe Norway Limited | Professional & scientific | 2010 |
| Surg Medical Ltd | Health & social care | 2023 |
| Surge-It LLP | | 2024 |
| Surimu Ltd | Public administration | 2024 |
| Surplus Surplus Ltd | Wholesale & retail | 2026 |
| Survantage Ltd | Professional & scientific | 2024 |
| Susan ANN Horn Ltd | Extraterritorial | 2025 |
| Susan ANN Roper Ltd | Extraterritorial | 2025 |
| Susan Jubb Family Law Ltd | Professional & scientific | 2012 |
| Suslik Ltd | Transport & logistics | 2017 |
| Sustain Energy Consulting Limited | Construction | 2019 |
| Sustainable Fuels Limited | Extraterritorial | 2021 |
| Sutcliffe-Ward Developments Ltd | Real estate | 2024 |
| Sutherland & Co Law Limited | Professional & scientific | 2015 |
| Sutherland and York Renewables Ltd | Construction | 2026 |
| Sutherland Waste Management Limited | Water & waste | 2019 |
| Sutro Services Limited | Construction | 2017 |
| Sutton CUM Lound Management Company Limited | Households | 2022 |
| Sutton Spring Limited | Manufacturing | 2004 |
| Suzie Rowan Ltd | Other services | 2020 |
| Suzy's Caravan Accessories Limited | Manufacturing | 2016 |
| SV Core Limited | Transport & logistics | 2020 |
| SV Installations Ltd | Construction | 2018 |
| SVK Restaurants Ltd | Hospitality | 2025 |
| Svoon Ltd | Information & communication | 2024 |
| Svplogistic Ltd | Transport & logistics | 2016 |
| SW Accounting Solutions (Wakefield) Limited | Professional & scientific | 2024 |
| SW Furniture Components Ltd | Professional & scientific | 2011 |
| SW Investment Group (UK) Limited | Other services | 2025 |
| SW Security (Yorkshire) Limited | Administrative & support | 2024 |
| Swales Electrical Services Ltd | Construction | 2019 |
| Swallow Estates (Yorkshire) Limited | Hospitality | 2001 |
| Swallow Properties (Yorkshire) LLP | | 2011 |
| Swallow Property and Lettings Ltd | Real estate | 2021 |
| Swallowdale Cafeteria Ltd | Hospitality | 2024 |
| Swamitime Solutions Ltd | Information & communication | 2024 |
| Swan Homes (Southall) Limited | Construction | 2016 |
| Swan Homes Group Limited | Real estate | 2023 |