| SEO London Ltd | Information & communication | 2004 |
| Sevenoaks Properties Ltd | Real estate | 2002 |
| Shelfstore Limited | Wholesale & retail | 1992 |
| Shop Barnet Ltd | Real estate | 2021 |
| SHÈ Enterprise Ltd | Hospitality | 2017 |
| Sigma Delta Psychiatry Expertise Limited | Professional & scientific | 2016 |
| Silver Leaf Estates Limited | Other services | 2019 |
| Sinclair Estates Limited | Real estate | 1933 |
| Skampa Electrical Limited | Construction | 2016 |
| SLC Finishes Limited | Construction | 2002 |
| Smart DV Limited | Manufacturing | 2003 |
| Smooth Trading Limited | Real estate | 2015 |
| Solar Chase Limited | Real estate | 2018 |
| Solid Stack Solutions Ltd | Information & communication | 2016 |
| Southgate Office LLP | | 2018 |
| Southgate Place Limited | Real estate | 2006 |
| Southwood Agents Ltd | Administrative & support | 2019 |
| SP Holdings London Ltd | Real estate | 2022 |
| Spagheteria Limited | Hospitality | 2015 |
| Sporting Habits Limited | Arts & recreation | 2012 |
| ST Michaels Accommodation Options Limited | Real estate | 2011 |
| ST19 Investments Limited | Administrative & support | 2018 |
| Staco Enterprises Limited | Construction | 2023 |
| Steven Farr Design Ltd | Professional & scientific | 2016 |
| Stillwater Properties Limited | Real estate | 2000 |
| Strats Estates & Letting Agents Limited | Real estate | 2003 |
| Strats Maintenance Solutions Limited | Construction | 2014 |
| Strats Property Maintenance Company Limited | Construction | 2014 |
| Studio 434 Limited | Extraterritorial | 2010 |
| Sunriseboiler Limited | Construction | 2017 |
| SWD Building Services Limited | Construction | 2026 |
| Syla Facades Limited | Construction | 2019 |
| Tastes SO Good CIC | Hospitality | 2022 |
| Techbar Inc Limited | Wholesale & retail | 2019 |
| Tesseras Properties Limited | Real estate | 2024 |
| Texblender Ltd | Wholesale & retail | 2017 |
| THE Casablanca Southgate Ltd | Other services | 2025 |
| THE Direct UK Trade Ltd | Wholesale & retail | 2018 |
| THE Fit Londoner Ltd | Information & communication | 2024 |
| THE Goat Construction Limited | Construction | 2020 |
| THE Heights Investment Company Limited | Real estate | 1997 |
| THE Men's Domain CIC | Administrative & support | 2021 |
| THE Psychotherapy Clinic Limited | Education | 2021 |
| THE Structured Print Consultants Limited | Manufacturing | 2000 |
| THE Wedding Day Coordinators Ltd | Professional & scientific | 2013 |
| Three Avenue Limited | Real estate | 2016 |
| Ticketsystems Limited | Extraterritorial | 2000 |
| Tigris Holdings Ltd | Real estate | 2019 |
| Tiko Properties Ltd | Real estate | 2024 |
| Tiritanou Investments LLP | | 2025 |
| TK Activities Ltd | Hospitality | 2017 |
| TKN on Sea Limited | Real estate | 2025 |
| Transalver Limited | Other services | 1998 |
| Tregenna Close Limited | Households | 2003 |
| Trichohair Care Limited | Other services | 2020 |
| Trinity Lodge (Westcliff) Limited | Education | 2000 |
| Tyler Street Medical Ltd | Health & social care | 2022 |
| UK Association of Lifelong Learning | Education | 2005 |
| UK Pro Building Ltd | Construction | 2024 |
| Uk-Certified Knowledge Association | Education | 1981 |
| Understand & Grow Your Numbers Limited | Professional & scientific | 2022 |
| Universal Mind Ltd | Information & communication | 2013 |
| Upbeat Limited | Arts & recreation | 2002 |
| Uzima Official Limited | Wholesale & retail | 2024 |
| V & G Group Limited | Other services | 2019 |
| Valalex Ltd | Real estate | 2018 |
| Veghlia Ltd | Information & communication | 2014 |
| Venus Digital Ltd | Professional & scientific | 2018 |
| Vita ET PAX School (Cockfosters) Limited | Education | 1980 |
| Vkkr Wealth Creators Limited | Construction | 2017 |
| Walsh Commercial Services Limited | Professional & scientific | 2013 |
| Wealth Property Investment Limited | Real estate | 2021 |
| Webwork International Ltd | Professional & scientific | 2019 |
| Westongate Ltd | Administrative & support | 2019 |
| Wildslow Limited | Professional & scientific | 2020 |
| Winchmore Hill Properties Limited | Real estate | 2024 |
| Wolfeton Securities Limited | Households | 1973 |
| Woodbridge Autos Limited | Wholesale & retail | 2020 |
| Y.T.M. Services Limited | Construction | 2016 |
| Y2K Mafia Limited | Wholesale & retail | 2025 |
| YACHT4LESS Ltd | Administrative & support | 2017 |
| YPO UK Regional Ltd | Other services | 2019 |
| ZA Consultancy Ltd | Professional & scientific | 2022 |
| ZAC Alexander Limited | Construction | 2016 |
| ZOE ADA Holdings LLP | | 2025 |