| Stuart Hirst Limited | Manufacturing | 1988 |
| Sturdy Foods Limited | Manufacturing | 2013 |
| Sturdy Group Holdings Limited | Financial services | 2024 |
| Sturdy Properties Limited | Real estate | 2017 |
| Subcon Design Limited | Professional & scientific | 2005 |
| SUE Beevers Limited | Administrative & support | 2016 |
| SUE Ltd | Hospitality | 2018 |
| SUM ADR Limited | Professional & scientific | 2021 |
| Sunamganj Spice Ltd | Hospitality | 2026 |
| Sunnyside Crossgates Limited | Health & social care | 2023 |
| Sunsey Holdings Limited | Financial services | 2020 |
| Sunspan Properties Limited | Real estate | 2008 |
| Supply Chain Red Ltd | Professional & scientific | 2018 |
| Support Group Services Ltd | Administrative & support | 2018 |
| Supportiveaction Ltd | Health & social care | 2025 |
| Sustainability Labs Limited | Professional & scientific | 2021 |
| Sveltest Limited | Health & social care | 2011 |
| Swaledale Investments Limited | Financial services | 2012 |
| Swaledale Properties Limited | Real estate | 2015 |
| Swan & Talbot Weatherby Ltd | Hospitality | 2023 |
| Sweet Brothers Vending Limited | Wholesale & retail | 1999 |
| Sweet Revolution Limited | Manufacturing | 2009 |
| Swift Research EOT Limited | Administrative & support | 2023 |
| Swift Research Limited | Professional & scientific | 1996 |
| Swinegate Management Services Limited | Extraterritorial | 1995 |
| Switched on Installations Limited | Manufacturing | 2026 |
| Switched on Investments Limited | Real estate | 2020 |
| Switchgear Limited | Manufacturing | 2004 |
| Sync Guitars Ltd | Manufacturing | 2025 |
| Synergy Equestrian Limited | Administrative & support | 2021 |
| T & V Rhodes Ltd. | Wholesale & retail | 2011 |
| T H Kilby & SON Limited | Agriculture & fishing | 2026 |
| T J Morris Consulting Ltd | Professional & scientific | 2026 |
| Table Barn Limited | Wholesale & retail | 2024 |
| Tactera Ltd | Information & communication | 2026 |
| Taegutec UK Limited | Wholesale & retail | 2000 |
| Takdirul Ltd | Wholesale & retail | 2025 |
| Tamblyn & Co. Limited | Professional & scientific | 2002 |
| Tamblyn Advisory Ltd | Professional & scientific | 2024 |
| Tandem Patents Limited | Professional & scientific | 2016 |
| Tangible IP Limited | Professional & scientific | 2007 |
| TAP Security Systems Limited | Administrative & support | 2007 |
| Tarmey Homes Ltd | Real estate | 2023 |
| Tasado Ltd | Real estate | 2020 |
| Task Consultants Limited | Information & communication | 2014 |
| Taste Cuisine-Yorkshire Ltd | Hospitality | 2020 |
| Taste of Freedom Ltd | Administrative & support | 2011 |
| Tasty Oakwood Limited | Hospitality | 2010 |
| Taxidermy Services Limited | Professional & scientific | 2013 |
| TBC Studio Ltd | Professional & scientific | 2015 |
| TC Building Control Services Limited | Professional & scientific | 2019 |
| TC Marketing Limited | Wholesale & retail | 2021 |
| TDL Plastering Ltd | Construction | 2025 |
| TDO Safety Netting Services Limited | Construction | 2024 |
| Team Credit & Finance Limited | Financial services | 2019 |
| Team Morris Investments Limited | Financial services | 2021 |
| Teamdykes Limited | Real estate | 2019 |
| Techforma Limited | Information & communication | 2019 |
| Techgrants Limited | Information & communication | 2019 |
| Technical Filtration Systems Limited | Transport & logistics | 1983 |
| Technical Research Solutions Limited | Professional & scientific | 2019 |
| Technology in Motion Limited | Health & social care | 1993 |
| Tectonix Natural Stone Limited | Wholesale & retail | 2022 |
| Teesside Podiatry Clinic Ltd | Health & social care | 2020 |
| Templarfox Consultancy Ltd | Professional & scientific | 2016 |
| Tenderiq Limited | Professional & scientific | 2025 |
| Tenuraco Limited | Wholesale & retail | 2013 |
| Terra Agent Ltd | Agriculture & fishing | 2026 |
| TF Automation Ltd | Extraterritorial | 2013 |
| TF8 Futures Ltd | Financial services | 2009 |
| TF8 Holdings Ltd | Information & communication | 2020 |
| TF8 Investments | Administrative & support | 2023 |
| Thackeray Stummings Ltd | Wholesale & retail | 2025 |
| THE Acres Linton Management Limited | Real estate | 2012 |
| THE Authentic Spark Limited | Professional & scientific | 2016 |
| THE Barn Digital Ltd | Professional & scientific | 2016 |
| THE Bike Shop (Leeds) Limited | Wholesale & retail | 2004 |
| THE Bingley Arms Ltd | Hospitality | 2023 |
| THE Bosun's Brewing Company Limited | Manufacturing | 2012 |
| THE Bosun’S Brewery TAP Ltd | Wholesale & retail | 2015 |
| THE Brambles (Skelmanthorpe) Management Company Limited | Households | 2021 |
| THE Bramham Cottage Company Limited | Real estate | 2018 |
| THE Brooklands (Thurlstone) Management Company Limited | Households | 2022 |
| THE Camerton (Thorngumbald) Ltd | Hospitality | 2025 |
| THE Cando Studio Limited | Administrative & support | 2019 |
| THE Cleaning Business Coach Limited | Professional & scientific | 2020 |
| THE Coffee Porter Ltd | Wholesale & retail | 2019 |
| THE Colour Corner Community CIC | Education | 2024 |
| THE Colour Corner Ltd | Education | 2023 |
| THE Country Store (Collingham) Limited | Wholesale & retail | 2000 |
| THE Crown Hotel (Pateley Bridge) Ltd | Hospitality | 2017 |
| THE Curious Travel Company Ltd | Administrative & support | 2023 |
| THE Dickens Bar and Inn Ltd | Hospitality | 2014 |
| THE Education Trust for Wetherby | Education | 2010 |
| THE Engine Inn Limited | Hospitality | 2014 |
| THE Engine Shed (Wetherby) Limited | Hospitality | 2012 |
| THE Essential Fire Protection Group Limited | Wholesale & retail | 2025 |
| THE Forge Sandwich Shop Limited | Hospitality | 2015 |
| THE Free Consultancy Ltd | Professional & scientific | 2020 |
| THE Gourmet Cafe Wetherby Limited | Hospitality | 2012 |