| Stream Axis Ltd | Professional & scientific | 2025 |
| Street Food Cart'El Limited | Hospitality | 2018 |
| Strong Telecoms Limited | Information & communication | 2020 |
| Strongman Removals & Storage Ltd | Transport & logistics | 2019 |
| Strongman Removals Ltd | Transport & logistics | 2023 |
| STS Sales Ltd | Wholesale & retail | 2025 |
| Stsfy Limited | Extraterritorial | 2021 |
| Student Shac Limited | Real estate | 2017 |
| Studio 23A Ltd | Professional & scientific | 2025 |
| Studio Quarter Limited | Wholesale & retail | 2023 |
| STUDIO74 Design Ltd | Professional & scientific | 2025 |
| Style Upholstery Limited | Manufacturing | 2017 |
| Subhan Mahmood Ltd | Construction | 2025 |
| Subiaco City Ltd | Households | 2025 |
| Subiaco Construct Ltd | Construction | 2025 |
| Subiaco Consultants Ltd | Professional & scientific | 2015 |
| Substance Events Group Limited | Arts & recreation | 2024 |
| Successful Happy Empowered 3 CIC | Education | 2026 |
| Successful Happy Empowered Limited | Education | 2026 |
| SUE & Deb's Childcare Ltd | Health & social care | 2020 |
| Suego Ltd | Administrative & support | 2024 |
| Sugos Limited | Health & social care | 2018 |
| Sultan Mineral Trading Limited | Wholesale & retail | 2019 |
| Suminate Limited | Administrative & support | 2013 |
| Summer Lane Ltd | Manufacturing | 2021 |
| Summerfield Gardens Management Company Limited | Households | 2026 |
| Summerfield Transport Limited | Transport & logistics | 2007 |
| Summit 25 Limited | Financial services | 2024 |
| Sunday House Limited | Wholesale & retail | 2022 |
| Sundown Holdings Limited | Administrative & support | 2006 |
| Sunrise Bakery Limited | Professional & scientific | 2002 |
| Sunrise Delight Limited | Hospitality | 2025 |
| Sunshine & Serenity Ltd | Other services | 2026 |
| Suntreckers Limited | Other services | 2010 |
| Super Digital Limited | Information & communication | 2015 |
| Super Skips Hire Ltd | Water & waste | 2026 |
| Superfast IT Limited | Information & communication | 2002 |
| Superhand Car Wash ( LYE) Ltd | Other services | 2025 |
| Supherb Produce Limited | Agriculture & fishing | 2011 |
| Supreme Logistics Services Limited | Administrative & support | 2025 |
| Supreme Spares Limited | Manufacturing | 2020 |
| Sur-Ron Birmingham Ltd | Wholesale & retail | 2026 |
| Surantha Patisserie Limited | Wholesale & retail | 2023 |
| Sure Sell Group Ltd | Extraterritorial | 2018 |
| Surface Sphere Limited | Health & social care | 2022 |
| Surrey Drive Management Ltd | Real estate | 2015 |
| Surya Risk Solutions Ltd | Professional & scientific | 2022 |
| Sustainable Development Solutions Ltd | Professional & scientific | 2023 |
| Sustainable Direction Limited | Professional & scientific | 2005 |
| Svna Motherland Ltd | Manufacturing | 2025 |
| Swallowfield Farm Equestrian and Livery Limited | Wholesale & retail | 2020 |
| Swancott Construction Ltd | Construction | 2022 |
| Swansea Mobile Tyres Limited | Wholesale & retail | 2026 |
| Sweet Pic'N'Mix Ltd | Wholesale & retail | 2025 |
| Swift Flow Heating Limited | Construction | 1998 |
| Swift Soft Ltd | Transport & logistics | 2025 |
| Swinford Engineering Limited | Manufacturing | 1989 |
| Swinford Prestige Haulage Limited | Transport & logistics | 2015 |
| Swinweld Limited | | 1964 |
| SWN Y Dail Management Company Limited | Real estate | 2009 |
| Sycamore Group Solutions Limited | Construction | 2023 |
| SYD Leisure Limited | Hospitality | 2015 |
| Sylvia Sumara Medical Tattoo Academy London Limited | Other services | 2026 |
| Synergistic PM Ltd | Construction | 2011 |
| Synergy Display Limited | Manufacturing | 2001 |
| Systems Learning Limited | Professional & scientific | 1983 |
| T & J Installations Limited | Manufacturing | 2024 |
| T & Q Property Ltd | Real estate | 2024 |
| T & R Healthcare Limited | Wholesale & retail | 2011 |
| T - MAN Limited | Manufacturing | 1987 |
| T J Saxon & Company Limited | Professional & scientific | 2011 |
| T K Engineering Services Ltd | Manufacturing | 2005 |
| T.E.A.M Property Maintenance Ltd | Households | 2020 |
| T2U Comms Ltd | Information & communication | 2021 |
| Take a Leaf Dyslexia Support Limited | Education | 2026 |
| Takumi UK Ltd | Hospitality | 2019 |
| Talbot Inn at Belbroughton Limited | Hospitality | 2019 |
| TAM Convenience Store Ltd | Wholesale & retail | 2025 |
| Tambaba London Limited | Real estate | 2010 |
| Tanmill Forklift Cabs Ltd | Manufacturing | 2022 |
| Tanti Investments Ltd | Real estate | 2025 |
| Tanworth Healthcare Ltd | Wholesale & retail | 2019 |
| TAR Skips & Transport Limited | Professional & scientific | 1985 |
| Target Stratigraphy Limited | Professional & scientific | 2013 |
| Tasman Industries Limited | Wholesale & retail | 1984 |
| Taste of Stourbridge Limited | Hospitality | 2018 |
| Tata Properties Ltd | Real estate | 2024 |
| Tax Avoidance Limited | Professional & scientific | 1995 |
| Tax Birmingham SW 2 Ltd | Professional & scientific | 2022 |
| Tax Worthy Accountants Limited | Professional & scientific | 2019 |
| Taxi Snaps Limited | Administrative & support | 2024 |
| Taycon Construction Ltd | Financial services | 2025 |
| Taylor Made Care Ltd | Health & social care | 2016 |
| Taylor-Isham Properties Ltd | Real estate | 2025 |
| Taylors Lettings Ltd | Real estate | 2017 |
| TB Healthcare Limited | Health & social care | 2011 |
| Tbsgg Ltd | Financial services | 1997 |
| TC Recycling Limited | Manufacturing | 2026 |
| Tc's Hair Ltd | Other services | 2026 |
| Tccg LLP | | 2022 |