| Rotay Holdings Limited | Real estate | 2026 |
| RTI London Limited | Administrative & support | 2009 |
| S J Ingram Property Services Limited | Real estate | 2022 |
| S2T Group Ltd | Wholesale & retail | 2000 |
| Sam's Heating & Plumbing Limited | Construction | 2011 |
| Samson Fixings Ltd | Manufacturing | 2013 |
| SEC Interiors Limited | Construction | 2011 |
| Select Fire Services Limited | Construction | 1995 |
| Selina Blow Limited | Wholesale & retail | 2014 |
| Semicom Visual Limited | Wholesale & retail | 2003 |
| Seneca Reid Limited | Financial services | 2010 |
| Sergnat Properties Ltd | Real estate | 2025 |
| Servatus Solutions Ltd | Information & communication | 2016 |
| Sibling Properties Limited | Real estate | 1993 |
| Simply Meribel Limited | Extraterritorial | 1998 |
| SKI OUT of the Blue Limited | Administrative & support | 1988 |
| Smartflooruk Ltd | Manufacturing | 2018 |
| Social Infrastructure Reit Limited | Financial services | 2009 |
| Spectrum Family Law Ltd. | Professional & scientific | 2012 |
| SSE Commercial Limited | Construction | 2002 |
| ST Peter's Street Developments Limited | Construction | 2014 |
| St.Nicholas School(Harlow)Limited | Education | 1962 |
| Stepton Limited | Construction | 2020 |
| Stevenette & Company LLP | | 2010 |
| Studio Branded Ltd | Manufacturing | 2023 |
| Summit Mortgage Solutions Ltd | Financial services | 2023 |
| T & S Carpentry Contractors Limited | Construction | 1994 |
| T M R Contracts Limited | Construction | 2003 |
| Taniv Homes Ltd | Real estate | 2023 |
| Technatti Ltd | Administrative & support | 2008 |
| Teknis Limited | Other services | 1965 |
| Terrace & Garden Limited | Wholesale & retail | 1991 |
| THE Challenge Gym Limited | Arts & recreation | 2003 |
| THE Chequers (Vesta) Ltd | Hospitality | 2024 |
| THE Optoelectronics Company Limited | Administrative & support | 2008 |
| THE Presidents Sporting Club Limited | Other services | 1996 |
| THE Storage Equipment Centre Limited | Construction | 2000 |
| Thornwood Grounds Maintenance Limited | Other services | 2018 |
| Through the Lens Design Ltd | Professional & scientific | 2019 |
| TMW Property Services Ltd | Real estate | 2011 |
| Transforming People Limited | Professional & scientific | 2017 |
| Travelin-Lite Ltd | Wholesale & retail | 2013 |
| Treewood Harvesting Ltd | Agriculture & fishing | 2010 |
| Tudorset Limited | Extraterritorial | 1994 |
| Vepod Ltd | Professional & scientific | 2023 |
| Verve Display Limited | Administrative & support | 2003 |
| Vesica Healthcare Ltd | Extraterritorial | 2005 |
| Wadhams Homes Ltd | Extraterritorial | 2017 |
| Walls & Futures Original Limited | Real estate | 2008 |
| WE Love Stoves Ltd | Wholesale & retail | 2013 |
| Weald Place Farm Limited | Professional & scientific | 2014 |
| White Hart Consultants Ltd | Professional & scientific | 2022 |
| Whole Hearted Ltd | Wholesale & retail | 2012 |
| WIN Portfolio Ltd | Real estate | 2025 |
| Winterbourne Investments Limited | Financial services | 2019 |
| WPR Holdings Ltd | Hospitality | 2020 |