| Sunny & Bay Limited | Wholesale & retail | 2021 |
| Sunny Side Cafe Ashley Cross Ltd. | Hospitality | 2025 |
| Sunnyhill Property Ventures Ltd | Construction | 2026 |
| Sunreso Ltd | Information & communication | 2024 |
| Sunrise 365 Solutions Ltd | Information & communication | 2022 |
| Sunrise Marine Finishing Ltd | Other services | 2019 |
| Sunseeker Customer Service Limited | Extraterritorial | 1992 |
| Sunseeker Exhibitions Limited | Extraterritorial | 1997 |
| Sunseeker International (Holdings) Limited | Professional & scientific | 2006 |
| Sunseeker International Distribution Ltd | Manufacturing | 1982 |
| Sunseeker International Limited | Manufacturing | 1960 |
| Sunseeker London Charters Limited | Professional & scientific | 2021 |
| Sunset Bay Golf Ltd | Wholesale & retail | 2021 |
| Sunset Bournemouth Limited | Wholesale & retail | 2014 |
| Sunshine & Sparkle Cleaning Ltd | Administrative & support | 2023 |
| Sunshine Life Ltd | Health & social care | 2023 |
| Sunstone Homes Ltd | Real estate | 2026 |
| Supaposeai Limited | Information & communication | 2026 |
| Super Consulting Limited | Information & communication | 2018 |
| Super Effective Ltd | Information & communication | 2014 |
| Super Food Fighter Ltd | Wholesale & retail | 2026 |
| Super Heat Ltd | Wholesale & retail | 2017 |
| Super Humans HQ CIC | Education | 2023 |
| Super Property Investments Ltd | Real estate | 2024 |
| Super Screed Ltd | Construction | 2010 |
| Super Seller Retail Ltd | Wholesale & retail | 2026 |
| Super Underfloor Heating Ltd | Wholesale & retail | 2020 |
| Superbuys Limited | Extraterritorial | 2008 |
| Superchromic Eyewear Limited | Manufacturing | 2012 |
| Superior Prime Limited | Wholesale & retail | 2025 |
| Superlec Limited | Extraterritorial | 2009 |
| Supernatural Studio Ltd. | Professional & scientific | 2016 |
| Superset Representatives Limited | Other services | 2026 |
| Superyacht Network Limited | Information & communication | 2011 |
| Superyacht Tender Solutions Ltd | Wholesale & retail | 2022 |
| Supp UP. Ltd | Wholesale & retail | 2023 |
| Supplement Container Ltd | Wholesale & retail | 2025 |
| Supplican Group Ltd | Health & social care | 2021 |
| Support Professionals Limited | Professional & scientific | 2005 |
| Supreme Property Limited | Construction | 2017 |
| Sure Start Renewables Ltd | Construction | 2020 |
| Sureco Ltd | Professional & scientific | 2014 |
| Surefix Property Maintenance Limited | Construction | 2026 |
| Surephone Limited | Information & communication | 2025 |
| Surereed Limited | Construction | 1978 |
| Sureware Ltd. | Information & communication | 2017 |
| Surf and Moto Limited | Manufacturing | 2017 |
| Surf Shack Limited | Extraterritorial | 2019 |
| SURFACE2AIR Sports Limited | Wholesale & retail | 2003 |
| Surgery Suit Ltd | Wholesale & retail | 2025 |
| Surgical First Assistant Ltd | Health & social care | 2022 |
| Surma Light Ltd | Hospitality | 2018 |
| Surrey Arches RTM Company Limited | Households | 2018 |
| Surrey Keep RTM Company Limited | Real estate | 2013 |
| Surrey Road South Lodge Management Company Ltd | Real estate | 2004 |
| Surtees Reading Limited | Administrative & support | 1999 |
| Susan Anderson Ltd | Other services | 2015 |
| Susan Gardner Consultancy Ltd | Information & communication | 2014 |
| Susi's Choice Ltd | Hospitality | 2020 |
| Sustain/Education Ltd | Education | 2021 |
| Susu Health Ltd | Health & social care | 2024 |
| Sutheran Project Solutions Limited | Professional & scientific | 2025 |
| Suttle Projects Limited | Construction | 2008 |
| Sutton Electricians Ltd | Construction | 2024 |
| Suusd UK Limited | Wholesale & retail | 2018 |
| SUY Media Limited | Information & communication | 2020 |
| SUY Shared Services Limited | Information & communication | 2020 |
| Suyog Limited | Health & social care | 2018 |
| Suzanas Commercial Cleaners Ltd | Administrative & support | 2012 |
| Suzanne Spicer Ltd | Professional & scientific | 2025 |
| Svanehoj UK Ltd | Manufacturing | 2018 |
| Sveltra Ltd | Wholesale & retail | 2025 |
| SVP Homes Ltd | Real estate | 2023 |
| SVP Telecom Ltd | Construction | 2018 |
| SVW Events Ltd | Arts & recreation | 2019 |
| SW Hospitality Consultant Ltd | Professional & scientific | 2024 |
| SW Portfolio Limited | Real estate | 2022 |
| SW2 Electrical Ltd | Construction | 2025 |
| Swain Electrical and Security Limited | Construction | 2026 |
| Sway Framed Ltd. | Wholesale & retail | 2022 |
| SWD Engineering Limited | Manufacturing | 2018 |
| SWD Manufacturing Limited | Manufacturing | 2017 |
| Swedish-Roulette Ltd | Information & communication | 2026 |
| Sweep Chief Ltd | Administrative & support | 2021 |
| Sweet Amber Ltd | Wholesale & retail | 2014 |
| Sweet Cheeks Products Ltd | Manufacturing | 2025 |
| Sweet Salvation Ltd | Manufacturing | 2022 |
| Sweetcom Limited | Information & communication | 2017 |
| SWF (Dorset) Ltd | Construction | 2024 |
| Swift Motor Services Limited | Wholesale & retail | 2003 |
| Swift Outsourcing Company Ltd | Administrative & support | 2020 |
| Swift Service & Maintenance Limited | Construction | 2025 |
| Swiftclearsolutions Ltd | Water & waste | 2025 |
| Swiftcube Ltd | Wholesale & retail | 2020 |
| Swiftdrop Global Limited | Wholesale & retail | 2025 |
| Swiftexpressjs Ltd | Transport & logistics | 2025 |
| Swiftix Holdings Ltd | Financial services | 2024 |
| Swiftix Software Ltd | Information & communication | 2024 |
| Swiftwing Technology Ltd | Information & communication | 2023 |
| Swimdler Ltd | Wholesale & retail | 2022 |