| Served Ltd | Wholesale & retail | 2024 |
| Shenley Glassworks Limited | Manufacturing | 2000 |
| Shenley Park Sports Centre Limited | Arts & recreation | 1999 |
| Shenleybury Management Company Limited | Households | 2002 |
| SLA Health Ltd | Administrative & support | 2025 |
| Slagel Property LLP | | 2022 |
| Soliv Property Limited | Real estate | 2022 |
| Sophie Home Ltd | Manufacturing | 2011 |
| South London Properties Limited | Real estate | 2012 |
| Spark Sports Education Limited | Education | 2024 |
| Spartacus Productions Limited | Information & communication | 1985 |
| Superkid-Net Ltd | Education | 2021 |
| Tenlord & Co Ltd. | Real estate | 2020 |
| THE Jemma Wayne Publishing Co. Limited | Information & communication | 1986 |
| THE WOW Recording Company Limited | Information & communication | 1993 |
| Tomten Kennels & Cattery Limited | Administrative & support | 2003 |
| Top Drawer Tours Limited | Arts & recreation | 2006 |
| Top Tasting Tours Limited | Hospitality | 2022 |
| Twenty Two Talent Partners Ltd | Administrative & support | 2025 |
| Twenty-Two Business Support & Development Ltd | Administrative & support | 2022 |
| Twotw Live Ltd | Information & communication | 2024 |
| Twotw Music Ltd | Information & communication | 2024 |
| Vance Medical Foods Ltd | Wholesale & retail | 2026 |
| Villa Scalabrini | Administrative & support | 2003 |
| VP Corporate LLP | | 2024 |
| WMC Slough Ltd | Construction | 2017 |
| Wood Hall (City Road) Ltd | Real estate | 2017 |
| Wood Hall (Claremont) Ltd | Construction | 2012 |
| Wood Hall (Ormside) Ltd | Construction | 2013 |
| Wood Hall (Pentonville) Ltd | Construction | 2013 |
| Wood Hall (Wakely) Ltd | Real estate | 2017 |
| Wood Hall Developments Ltd | Construction | 2012 |
| Wood Hall Land LLP | | 2010 |
| Wood Hall Securities Ltd | Real estate | 2022 |
| Woodbine Consultants LLP | | 2025 |
| Woodsy Pint Ltd | Hospitality | 2024 |
| Zarya Clinic Limited | Health & social care | 2025 |