| S J Hempenstall Haulage Limited | Construction | 2007 |
| Social Paws Solutions Ltd | Professional & scientific | 2025 |
| Spa Ceylon UK Ltd | Other services | 2020 |
| Sparktherm LLP | | 2018 |
| Spvro Limited | Wholesale & retail | 2019 |
| Strategic Engineering Management Consultants Ltd | Professional & scientific | 2021 |
| Studio Beech Ltd | Information & communication | 2021 |
| Subway Universal Limited | Hospitality | 2003 |
| THE Capital Dairy Company (Holdings) Limited | Financial services | 2012 |
| THE Leaves Review Ltd | Information & communication | 2026 |
| THE Residents Association, Harefield Place Limited | Households | 2018 |
| Top Bargains Limited | Wholesale & retail | 2017 |
| TPH Rail Consulting Limited | Transport & logistics | 2013 |
| Twoth Aesthetics SJW Limited | Health & social care | 2022 |
| Twoth Limited | Financial services | 2020 |
| Twoth Paste SJW Limited | Health & social care | 2022 |
| Universal Estate UK Ltd | Real estate | 2007 |
| Universal Industry Ltd | Wholesale & retail | 2024 |
| Vanguard Executive Chauffeurs Ltd | Other services | 2019 |
| Vanguard Shadow Protection Ltd | Administrative & support | 2025 |
| Venus Textile Ltd | Wholesale & retail | 2026 |
| Vh-Bsc Walthamstow Ltd | Wholesale & retail | 2023 |
| Virtus Fire Ltd | Administrative & support | 2023 |
| Virtus Maintenance Services Ltd | Administrative & support | 2023 |
| Virtus Service Group Ltd | Administrative & support | 2022 |
| Vv-Dd Euston Ltd | Hospitality | 2025 |
| Vyas Remedy Limited | Health & social care | 2015 |
| Wayfarers (Ickenham) L.T.C. Limited | Arts & recreation | 1987 |
| Websco Ltd | Information & communication | 2016 |
| Westway Carpentry Ltd | Construction | 2025 |
| WFL Welling Limited | Real estate | 2014 |
| WVH Plumbing & Heating Ltd | Other services | 2018 |