| Star Financial Consultancy Limited | Wholesale & retail | 2019 |
| Star Fish & Chips London Ltd | Hospitality | 2022 |
| Star Hospitality Limited | Hospitality | 2014 |
| Star Media Trading Ltd | Manufacturing | 2019 |
| Star MSG Construction Ltd | Construction | 2020 |
| Star Optical Ltd. | Administrative & support | 2016 |
| Star Pharmaceuticals Limited | Manufacturing | 2000 |
| Star Pizza Deptford Ltd | Professional & scientific | 2019 |
| Star Safety Solutions Ltd | Professional & scientific | 2023 |
| Star Zebrak Limited | Extraterritorial | 2016 |
| Starbuild Holdings Limited | Financial services | 2017 |
| Starbuild Properties Limited | Construction | 2014 |
| Starbuild Retail Investments Limited | Construction | 2015 |
| Starcrafts Limited | Arts & recreation | 2026 |
| Stardom Properties UK Ltd | Real estate | 2013 |
| Stardvn Lounge Limited | Hospitality | 2025 |
| Starent Limited | Wholesale & retail | 2023 |
| Starfile Network Limited | Administrative & support | 2011 |
| Starfish Films Limited | Information & communication | 2004 |
| Starfleet Haulage Ltd | Transport & logistics | 2025 |
| Stark Land and Property Limited | Real estate | 2022 |
| Stark Motors Limited | Wholesale & retail | 2024 |
| Stark Pro Safety Ltd | Wholesale & retail | 2020 |
| Starlight Wholesales Ltd | Wholesale & retail | 2022 |
| Starr Builders Limited | Construction | 2021 |
| Stars Homes Ltd | Construction | 2014 |
| Stars Homes Property Ltd | Real estate | 2019 |
| Starsea Capital Group Ltd | Real estate | 2024 |
| Start and Build Limited | Professional & scientific | 1995 |
| Start to END Consulting Limited | Professional & scientific | 2019 |
| Startline Services Ltd | Construction | 2020 |
| Startop Cleaning Limited | Administrative & support | 2025 |
| Starwalk Limited | Hospitality | 1995 |
| Starway London Limited | Construction | 2025 |
| Stat Holding International Limited | Professional & scientific | 2002 |
| Stateland Ltd | Real estate | 2019 |
| Static Wave Films Ltd | Information & communication | 2026 |
| Station Approach (Sudbury) Limited | Real estate | 2009 |
| Station Food Centre Ltd | Wholesale & retail | 2024 |
| Station House Medical Centre Limited | Health & social care | 1986 |
| Station Kiosk Limited | Wholesale & retail | 2012 |
| Station Parade (Denham) RTM Limited | Households | 2003 |
| Station Road DEV Co Limited | Construction | 2017 |
| Statistix Limited | Real estate | 2022 |
| Stats Energy Solutions Ltd | Construction | 2025 |
| Statusquo Digital Ltd | Information & communication | 2025 |
| Stay Healthy Limited | Wholesale & retail | 1998 |
| Stayprotech Ltd | Wholesale & retail | 2021 |
| Steadfaster Consultancy Ltd | Information & communication | 2010 |
| Steak Holdings Ltd | Hospitality | 2024 |
| Steam & Stone Limited | Hospitality | 2026 |
| Steam Transport Ltd | Transport & logistics | 2019 |
| Stedforward Ltd | Construction | 2023 |
| Steel Development and Consulting Limited | Real estate | 2016 |
| Steel Lobby Ltd | Manufacturing | 2013 |
| Steene Associates (Architects) Limited | Professional & scientific | 1994 |
| Stef Stadler Ltd | Construction | 2014 |
| Stefan Production Ltd | Construction | 2021 |
| Stefans Plastering Ltd | Construction | 2017 |
| Stefanut Gradina Bunicii Ltd | Wholesale & retail | 2020 |
| Stefanutuk Ltd | Construction | 2019 |
| Stehlin UK Limited | Construction | 2011 |
| Stejarul Foods Ltd | Wholesale & retail | 2020 |
| Stejarul Ltd | Wholesale & retail | 2018 |
| Steka Complete Building Services Ltd | Construction | 2021 |
| Stel Transport Ltd | Transport & logistics | 2025 |
| Stelian Joinery Ltd | Construction | 2019 |
| Stelian&Maria Ltd | Hospitality | 2020 |
| Stellakraft Ltd | Information & communication | 2019 |
| Stellar Bazar Limited | Wholesale & retail | 2024 |
| Stellar Concerts Ltd | Administrative & support | 2024 |
| Stellar Kind Group Limited | Professional & scientific | 2015 |
| Stellar Tours Limited | Administrative & support | 2024 |
| Stellaseller Ltd | Construction | 2018 |
| Stelyans Ltd | Construction | 2016 |
| Stem Club Acton Ltd | Education | 2025 |
| Stenigot UK Limited | Real estate | 2014 |
| Step IT UP Infrastructure Ltd | Information & communication | 2025 |
| Step Ladder Properties Limited | Real estate | 2019 |
| Step-In Arts Ltd | Other services | 2012 |
| Step-In Cafe Ltd | Information & communication | 2012 |
| Step-In Group Ltd | Professional & scientific | 2015 |
| Stephanie M Bush Limited | Health & social care | 2019 |
| Stephen Howard Homes Hadham Road LLP | | 2002 |
| Stephen J Woodward Limited | Real estate | 1993 |
| Stephen Y Limited | Real estate | 1993 |
| Stepping Stones (ITM) Ltd | Real estate | 2023 |
| Steps Together Group Ltd | Financial services | 2020 |
| Steps Together Rehab (Leicester) Limited | Health & social care | 2016 |
| Steps Together Rehab (ST Helen’S) Ltd | Health & social care | 2021 |
| Steps Together Rehab Limited | Health & social care | 2016 |
| Stepuplife Limited | Professional & scientific | 2025 |
| Stepwise Ventures Ltd | Real estate | 2025 |
| Steripharm (UK) Limited | Wholesale & retail | 2005 |
| Sterling Accountancy & Bookkeeping Limited | Professional & scientific | 2011 |
| Sterling Accountancy Holdings Limited | Financial services | 2024 |
| Sterling Accounts Limited | Professional & scientific | 2024 |
| Sterling Audit Services Limited | Professional & scientific | 2024 |
| Sterling Block Payroll Limited | Professional & scientific | 2025 |
| Sterling CA (Middlesex) Limited | Extraterritorial | 2012 |