| Sunhill Care Ltd | Health & social care | 2025 |
| Sunil Properties (UK) Limited | Real estate | 2023 |
| Sunny Side Mortgage Services Limited | Financial services | 2026 |
| Sunnyside Estate Management Ltd | Administrative & support | 2017 |
| Sunrise Auto Healers Limited | Wholesale & retail | 2023 |
| Sunrise Stores Ltd | Wholesale & retail | 2019 |
| Super Taxis Limited | Transport & logistics | 2023 |
| Superior Care (Midlands) Limited | Health & social care | 2002 |
| Supporting HER Empowerment Ltd | Administrative & support | 2020 |
| Supportive Ties Ltd | Health & social care | 2026 |
| Supragene Ltd | Wholesale & retail | 2023 |
| Supreme ROM Clean Limited | Administrative & support | 2025 |
| Supreme Traders Co Limited | Wholesale & retail | 2018 |
| Surface Fabrications Limited | Manufacturing | 2014 |
| Surgical Edge Co Ltd. | Manufacturing | 2012 |
| Suri and Sons Motors Ltd | Wholesale & retail | 2024 |
| Suri Mechanics Limited | Wholesale & retail | 2021 |
| Sustainix Ltd | Construction | 2025 |
| SV Salads Ltd | Agriculture & fishing | 2022 |
| SVS Recruitment Ltd | Administrative & support | 2008 |
| Svsr Investment Ltd | Real estate | 2018 |
| SW Flooring & Multi Trade Ltd | Construction | 2021 |
| Swallowfield Courtyard (Management) Limited | Households | 2004 |
| Swansonservices Limited | Professional & scientific | 2025 |
| Swiftfire Holdings Limited | Professional & scientific | 2007 |
| Swiftly Auto Services Ltd | Wholesale & retail | 2023 |
| Swifts Roofing & Construction Ltd | Construction | 2026 |
| Swiss Steel UK Ltd. | Wholesale & retail | 1958 |
| Swissborg Properties Limited | Real estate | 2021 |
| Syco Eliquids Limited | Financial services | 2016 |
| Syensqo Holdings Limited | Professional & scientific | 1995 |
| Syensqo International Holdings Limited | Professional & scientific | 1898 |
| Syensqo Pensions Trust Limited | Administrative & support | 1999 |
| Syensqo Pharma Solutions Limited | Manufacturing | 1965 |
| Syensqo Solutions UK Limited | Manufacturing | 1892 |
| Sygo Couriers Ltd | Transport & logistics | 2021 |
| Sylbir Ltd | Health & social care | 2013 |
| Sylbir Properties Ltd | Real estate | 2024 |
| Synergy One Limited | Professional & scientific | 2022 |
| T & B Builders (Holdings) Limited | Financial services | 2022 |
| T Lives Healthcare Ltd | Health & social care | 2023 |
| T&T Couriers Limited | Transport & logistics | 2020 |
| T&T Parts Ltd | Wholesale & retail | 2023 |
| T.J. Richardson & Sons Ltd | Extraterritorial | 2017 |
| Tach Travel Innovators Limited | Wholesale & retail | 2019 |
| Taha Investment Limited | Health & social care | 2013 |
| TAJ Wine Ltd | Wholesale & retail | 2019 |
| Takhar Holdings Ltd | Real estate | 2024 |
| Takhar Store Ltd | Wholesale & retail | 2019 |
| Talent Launchr Ltd | Administrative & support | 2025 |
| Tandon Limited | Manufacturing | 2018 |
| Tango Toys Ltd | Wholesale & retail | 2017 |
| Tangroot Builders Limited | Construction | 2014 |
| Tanuva Aesthetics Limited | Other services | 2025 |
| Tanya Property Management Limited | Real estate | 2019 |
| Taperhaus Barbershop Limited | Other services | 2023 |
| Tararache Ltd | Wholesale & retail | 2026 |
| Taste Good Food Limited | Hospitality | 2017 |
| Tastyeats Limited | Hospitality | 2018 |
| TAT Investments Limited | Transport & logistics | 2016 |
| Tatbank Road Mot's Limited | Wholesale & retail | 2023 |
| Tatenda Private Limited | Health & social care | 2014 |
| Tawpam Properties Ltd | Real estate | 2021 |
| Taxspot Ltd | Professional & scientific | 2026 |
| Taylor Engineering Co (Oldbury) Limited | | 1986 |
| Taylor Reed Commercial Ltd | Real estate | 2019 |
| Taylor Reed Homes Ltd | Construction | 2013 |
| TB Direct Ltd | Wholesale & retail | 2023 |
| Tbfc Limited | Hospitality | 2013 |
| Tbtrf Ltd | Construction | 2014 |
| TC BSN Limited | Financial services | 2019 |
| TC59 Limited | Arts & recreation | 2021 |
| TC86 Drylining Ltd | Construction | 2016 |
| TCB69 Ltd | Hospitality | 2025 |
| TCL Compliance Limited | Households | 2025 |
| Team Truck Ltd | Transport & logistics | 2018 |
| Tech TOK Ltd | Wholesale & retail | 2020 |
| Techismart Ltd | Information & communication | 2022 |
| Techspiree Limited | Wholesale & retail | 2025 |
| Techtrace Partners Ltd | Administrative & support | 2024 |
| Teen Mentoring Limited | Education | 2025 |
| TEF Properties Ltd | Real estate | 2023 |
| Teleioo Consultancy Limited | Information & communication | 2018 |
| Telfairia Limited | Real estate | 2024 |
| Telford Freight Ltd | Transport & logistics | 2024 |
| Tempworks.Ai Ltd | Information & communication | 2025 |
| TEN NJK (UK) Limited | Professional & scientific | 2008 |
| Tenlite Ventures Ltd | Wholesale & retail | 2020 |
| Tennals Environmental Services Limited | Public administration | 2023 |
| Tennals Pest Control Limited | Administrative & support | 2018 |
| Tenurelong Property Management Limited | Households | 1996 |
| Tester D Limited | Wholesale & retail | 2020 |
| Tete Etete Ltd | Wholesale & retail | 2024 |
| TF Pharma Limited | Professional & scientific | 2023 |
| Tgas Properties Ltd | Real estate | 2025 |
| TGR Solutions Limited | Construction | 2025 |
| TH Build Solutions Limited | Construction | 2020 |
| THE Adhd Adults Ltd | Wholesale & retail | 2023 |
| THE Arlington Richardson Development Partnership LLP | | 2015 |
| THE Birmingham Tuition Experts Ltd | Education | 2023 |