| Structure and Style Renovations Limited | Construction | 2026 |
| STS Care Ltd | Health & social care | 2019 |
| Studio Number 10 Limited | Manufacturing | 2020 |
| Study Home Improvement Ltd | Water & waste | 2025 |
| Subby Consultanncy Limited | Information & communication | 2026 |
| Subete Limited | Professional & scientific | 2019 |
| Suhail ALI Ltd | Health & social care | 2021 |
| Sumik Ventures Limited | Extraterritorial | 1995 |
| Sumnalls Plumbing & Heating Limited | Construction | 2026 |
| Sundial Health Limited | Professional & scientific | 2010 |
| Sunray Palm Developments Limited | Construction | 2021 |
| Sunrise Construction & Maintenance Service Limited | Construction | 2024 |
| Sunstone Partners LLP | | 2022 |
| Super Troopers Care Ltd | Other services | 2022 |
| Supertrucks Glass Carriers Ltd | Manufacturing | 2014 |
| Support in Education Life and Family Ltd | Health & social care | 2019 |
| Supreme Showgirls Limited | Extraterritorial | 2013 |
| Surgical Oracle Ltd | Education | 2020 |
| Sutura Group Limited | Health & social care | 2017 |
| SV Utilities Limited | Energy | 2023 |
| SVH IT Consultancy Ltd | Information & communication | 2025 |
| SW Management Limited | Professional & scientific | 2015 |
| Swadlings Fire and Security Limited | Administrative & support | 2020 |
| Sweetshakes Ltd | Wholesale & retail | 2021 |
| Sweetsshakes Ltd | Manufacturing | 2025 |
| Swift & Move Ltd | Transport & logistics | 2022 |
| Swift Project Solutions Limited | Construction | 2026 |
| Swift Property & Estates Limited | Real estate | 2024 |
| Swift Shopfitting Limited | Construction | 2013 |
| Swinford Old Hall Management Company Ltd | Households | 2000 |
| SWM22 Ltd | Other services | 2022 |
| Symetrie Ltd | Health & social care | 2015 |
| Synergetic Recruitment Group Limited | Administrative & support | 2017 |
| Synergy Complete Solutions Limited | Real estate | 2016 |
| Synergy Hardware Limited | Wholesale & retail | 2014 |
| Syntra Real Estate Limited | Professional & scientific | 2025 |
| System Recruitment Limited | Administrative & support | 2000 |
| T & L (Stourbridge) Limited | Construction | 2014 |
| T and a Ductwork Ltd | Construction | 2019 |
| T H Baker Global Incorporated Ltd | Professional & scientific | 2018 |
| T H Baker Holdings Limited | Professional & scientific | 2015 |
| T I Curtis Ltd | Professional & scientific | 2006 |
| T S Electrical Limited | Construction | 2006 |
| T W F a Limited | Financial services | 2020 |
| T Withers (Domestic Appliances) Limited | Other services | 2003 |
| T. H. Baker Goldsmiths Limited | Wholesale & retail | 2010 |
| T. H. Baker Group Limited | Professional & scientific | 2007 |
| T. H. Baker Limited | Wholesale & retail | 2012 |
| T. Taylor Property Limited | Construction | 2021 |
| T.A.Houses Ltd | Real estate | 2020 |
| T.D.R. Transport Services (Holdings) Limited | Financial services | 2019 |
| T.D.R. Transport Services Limited | Transport & logistics | 1993 |
| T.H Baker Anytime Ltd | Professional & scientific | 2017 |
| T.H. Baker (Management Services) Limited | Wholesale & retail | 2010 |
| T.H. Baker Services Limited | Other services | 2026 |
| T.H.Baker & Co.(Established 1888)LIMITED | Wholesale & retail | 1952 |
| TA Transport (Midlands) Ltd | Transport & logistics | 2023 |
| Tafa Development Limited | Construction | 2023 |
| Taft Corporate Advisors Ltd | Professional & scientific | 2021 |
| Taft Retail PLC | Wholesale & retail | 2021 |
| TAG Media 13 Ltd | Other services | 2018 |
| Tahcow Limited | Health & social care | 2014 |
| Tahrir Limited | Real estate | 2011 |
| Tait Tech Solutions Ltd | Information & communication | 2012 |
| Talbot Street Properties Limited | Households | 2012 |
| Talk of the TAN Ltd | Wholesale & retail | 2022 |
| Tallouzi Health Ltd | Health & social care | 2021 |
| Tamrock Great Britain Holdings Ltd | Extraterritorial | 1989 |
| TAN Fast Ltd | Other services | 2024 |
| Tango-Whiskey Ltd | Administrative & support | 2026 |
| Tanning Box Limited | Other services | 2023 |
| Tansterne Biomass Ltd | Energy | 2025 |
| Target Tomorrow Limited | Wholesale & retail | 2025 |
| Tarr Optical Limited | Wholesale & retail | 2025 |
| Taxguard Limited | Professional & scientific | 2005 |
| Taxguardian Limited | Professional & scientific | 1989 |
| Taxwise Limited | Professional & scientific | 1976 |
| Taylex Displays Limited | Construction | 2007 |
| Taylor Made Hearing Aids Limited | Wholesale & retail | 2018 |
| Taylor Reid Development Limited | Real estate | 2012 |
| Taylor-Marriott Limited | Information & communication | 2026 |
| TB Project Planning Limited | Professional & scientific | 2026 |
| TBC Housing Ltd | Real estate | 2025 |
| TD Motorsport Ltd | Arts & recreation | 2018 |
| Tdemify Ltd | Professional & scientific | 2023 |
| Teachertab Ltd | Information & communication | 2026 |
| Team Tilt Ltd | Other services | 2021 |
| TEAM4NATURE Biospheres Ltd | Professional & scientific | 2024 |
| TEAM4NATURE Commercial Grounds Maintenance Ltd | Administrative & support | 2023 |
| Techmain Limited | Manufacturing | 2014 |
| Techmed Products Limited | Professional & scientific | 2021 |
| Technical Holdings Limited | Financial services | 2020 |
| Tedd Murwisi Ltd | Construction | 2024 |
| Teemi Consultancy Ltd | Administrative & support | 2025 |
| Teknolohiya Corporate Ltd | Information & communication | 2016 |
| Telford Crane Hire Limited | Extraterritorial | 2009 |
| TEN Point Five Limited | Professional & scientific | 2007 |
| Tenant Eviction 21 Ltd | Real estate | 2018 |
| Terrance Rugby Property Group Limited | Real estate | 2020 |
| Tery Logistic Ltd | Transport & logistics | 2015 |