| Strategy Investments Group Ltd | Real estate | 2026 |
| Strategy Sync Ltd | Information & communication | 2025 |
| Stratford House (Leeds) Management Company Limited | Households | 2016 |
| Stratford REX Ltd | Hospitality | 2025 |
| Stratholdings Limited | Financial services | 2020 |
| Strathos Energy Ltd | Wholesale & retail | 2015 |
| Stratico Ltd | Administrative & support | 2025 |
| Stratigo Group Limited | Professional & scientific | 2026 |
| Strativ FME Ltd | Administrative & support | 2022 |
| Strativ Group Ltd | Administrative & support | 2018 |
| Strativ Industrial Ltd | Administrative & support | 2022 |
| Strativ Services Ltd | Administrative & support | 2022 |
| Strativ Tech Ltd | Administrative & support | 2022 |
| Stratnord Consulting Ltd | Information & communication | 2024 |
| Stratohive Properties Ltd | Real estate | 2025 |
| Stratos Taxation Limited | Professional & scientific | 2013 |
| Stratos Works Ltd | Information & communication | 2025 |
| Stratospheric Holdings Limited | Administrative & support | 2026 |
| Stratospheric Investments Ltd | Administrative & support | 2026 |
| Stratten Group Ltd | Households | 2023 |
| Stratton Hamilton Limited | Other services | 2018 |
| Stratton Land Limited | Construction | 2012 |
| Stratton Procurement Limited | Manufacturing | 2014 |
| Stratum Partners Limited | Administrative & support | 2025 |
| Stratum Property Group Limited | Real estate | 2026 |
| Stratxagcy Ltd | Professional & scientific | 2026 |
| Stravon Global Ltd | Construction | 2025 |
| Straw Straws Ltd | Wholesale & retail | 2022 |
| Stray Consulting Ltd | Professional & scientific | 2020 |
| Stray Wayz Ltd | Wholesale & retail | 2025 |
| Stream JET Property Company Ltd | Wholesale & retail | 2004 |
| Streamline Taxis Leeds Ltd | Transport & logistics | 2007 |
| Streamline Telecars Ltd | Transport & logistics | 2012 |
| Streejaane | Financial services | 2010 |
| Street Clothes Limited | Wholesale & retail | 1979 |
| Street Dance Training Ltd | Education | 2023 |
| Street EAT (Baildon) Ltd | Hospitality | 2019 |
| Street Food Leeds Ltd | Hospitality | 2024 |
| Street Lane Bakery Limited | Manufacturing | 2013 |
| Street Lane Court Maintenance Company (Leeds) Limited | Households | 1980 |
| Street Lane Fashions Ltd | Wholesale & retail | 2018 |
| Street Lane Fisheries Limited | Hospitality | 2025 |
| Street Lane Foods Ltd | Wholesale & retail | 2025 |
| Street Lane Management (Leeds) Limited | Households | 2013 |
| Street Lane Properties & Investments Ltd | Real estate | 2023 |
| Street Orphans | Health & social care | 2014 |
| Street Work Soccer Academy Ltd | Arts & recreation | 1998 |
| Street World Soccer Limited | Education | 2020 |
| Streets Ahead Leeds Limited | Real estate | 1997 |
| Streets Ahead Recruitment Limited | Professional & scientific | 2015 |
| Streetsites Limited | Professional & scientific | 1999 |
| Streetwise Consultants Limited | Information & communication | 2025 |
| Strength 2 Strength Health Solutions Ltd | Wholesale & retail | 2021 |
| Strength and Conditioning Elite UK Ltd | Arts & recreation | 2018 |
| Strengthworks Limited | Arts & recreation | 2020 |
| Stretch & Burn Limited | Wholesale & retail | 2020 |
| Strictly PC Limited | Manufacturing | 2000 |
| Stride Courier Services Ltd | Transport & logistics | 2019 |
| Stride Motors Ltd | Extraterritorial | 2022 |
| Striding Ventures Limited | Real estate | 2025 |
| Striker Tots Ltd | Arts & recreation | 2011 |
| Strill Cafe Limited | Hospitality | 2022 |
| String Products Ltd | Wholesale & retail | 2009 |
| Stripe Store Ltd | Wholesale & retail | 2022 |
| Strive Independent Academy Limited | Education | 2024 |
| Strive Specialized Support Services Ltd | Hospitality | 2023 |
| Strivehomesstates Ltd | Households | 2025 |
| Strivesocialcare Limited | Other services | 2021 |
| Striving for Inclusion C.I.C. | Health & social care | 2024 |
| Strixly Ltd | Wholesale & retail | 2024 |
| Strong Technology UK Ltd | Manufacturing | 2016 |
| Strong Tower Properties Limited | Real estate | 2017 |
| Strongly Typed Ltd | Information & communication | 2023 |
| Strongparts Printing Services Ltd | Manufacturing | 2026 |
| Stroop Studio Limited | Manufacturing | 2026 |
| Stroud Flooring/Blinds Limited | Manufacturing | 2007 |
| Stroud's Auto Repairs Ltd | Wholesale & retail | 2022 |
| Structeco Limited | Construction | 2020 |
| Structon CM Limited | Construction | 2026 |
| Structura Structural Ltd | Professional & scientific | 2026 |
| Structure Vision Limited | Information & communication | 2003 |
| Structured Acquisitions Ltd | Construction | 2013 |
| Structured Homes Limited | Real estate | 2017 |
| Structured Properties Ltd | Real estate | 2021 |
| Struqta Group (Leeds) Ltd | Construction | 2021 |
| Struqta Group Limited | Construction | 2020 |
| Strutt Decorating Ltd | Construction | 2023 |
| Strutt IT Consulting Ltd | Information & communication | 2026 |
| Strux Ltd | Construction | 2024 |
| Struxen Systems Limited | Professional & scientific | 2026 |
| Struykmatic Limited | Information & communication | 2025 |
| STU Wright Coaching Ltd | Other services | 2025 |
| Stuart Ball Services Limited | Professional & scientific | 2008 |
| Stuart Bullock Consulting Ltd | Other services | 2023 |
| Stuart Bullock Group Ltd | Professional & scientific | 2023 |
| Stuart Mcbride Solutions Limited | Professional & scientific | 2015 |
| Stuart Morgan Recruitment Ltd | Administrative & support | 2023 |
| Stuart Oldroyd (Yorkshire) Limited | Professional & scientific | 2015 |
| Stuart Rivers & Co | Administrative & support | 2002 |
| Stuart Rivers Associates Limited | Professional & scientific | 2014 |