| Raebriar Limited | Households | 1993 |
| RB Property Services LDN Ltd | Construction | 2026 |
| Reddington Close Estate Management Company Limited | Households | 1972 |
| Reign Security Services Limited | Administrative & support | 2022 |
| Retail Summit Ventures Ltd | Financial services | 2024 |
| Robens Management Limited | Households | 2015 |
| Rodenhurst Court (1990) Limited | Households | 1991 |
| Rose Court Residents Limited | Households | 1993 |
| Rumz Catering Ltd | Hospitality | 2025 |
| Rumz Gafoor Ltd | Wholesale & retail | 2016 |
| Rvcn Tech Solutions Ltd | Information & communication | 2026 |
| RVP Limited | Construction | 2017 |
| RYE House Management (Peckham) Limited | Households | 1989 |
| RYE House Management (Peckham) RTM Company Limited | Households | 2004 |
| S & F Building Ltd. | Construction | 2017 |
| S&A Inclusive Care Group Limited | Public administration | 2025 |
| Sable & Co.(Uk) Limited | Water & waste | 1999 |
| Safesec Training Ltd. | Education | 2024 |
| Salp Limited | Real estate | 1995 |
| Sandcot Limited | Households | 2001 |
| Sandwichmandem Ltd | Real estate | 2020 |
| Saphire International Limited | Administrative & support | 2009 |
| Sarawood Limited | Households | 1980 |
| Sarva Vidya Ltd | Information & communication | 2017 |
| Sasa Technologies Ltd | Information & communication | 2026 |
| Savannah Streams Limited | Health & social care | 2015 |
| Sawyer & Fisher Limited | Professional & scientific | 1996 |
| Scaleflow Digital Ltd | Wholesale & retail | 2026 |
| Secureprem Ltd | Professional & scientific | 2025 |
| Seed of Peace CIC | Administrative & support | 2016 |
| Selco Ltd | Professional & scientific | 2019 |
| Self and System Limited | Professional & scientific | 2021 |
| Self Assured Limited | Financial services | 1996 |
| Selsdon Heights Management Company Limited | Households | 2011 |
| Shape Construction Limited | Wholesale & retail | 1997 |
| Sheridan Court (Coombe Road) Limited | Households | 1995 |
| Shield Cleaning Services Limited | Professional & scientific | 1997 |
| Shiningpearls Ltd | Health & social care | 2021 |
| Simna Creative Consulting Limited | Real estate | 2005 |
| Siso Healthcare Limited | Health & social care | 2026 |
| Siva Capital Ltd | Real estate | 2025 |
| Siva Ltd | Wholesale & retail | 2021 |
| Skeleton Crew Ltd | Arts & recreation | 2018 |
| Smtrainingsolutions Ltd | Professional & scientific | 2022 |
| SNB Construction UK Limited | Other services | 2011 |
| Solaris International Limited | Professional & scientific | 2019 |
| Solved Electrical Ltd | Construction | 2019 |
| Sonal Property Holdings Ltd | Real estate | 2020 |
| Southlands (Surrey) Management Company Limited | Households | 1989 |
| Sparkeye Limited | Construction | 2026 |
| SR PUB Services Limited | Hospitality | 2025 |
| ST James Road Limited | Real estate | 2008 |
| ST Lukes Mews Freehold Ltd | Households | 2026 |
| ST Lukes Mews RTM Company Limited | Households | 2011 |
| ST. Christopher's Court (Croydon) Residents Company Limited | Households | 1985 |
| St.Clair Management Limited | Households | 1971 |
| Stannus Court Management Limited | Households | 1980 |
| Starlink EDU Limited | Education | 2023 |
| Steeple Hill Management Limited | Households | 1974 |
| Stephenson Court Management Company Limited | Households | 2001 |
| Storkhomecare Ltd | Health & social care | 2010 |
| Stubbs House Management Limited | Households | 1980 |
| Stubbs House RTM Company Ltd | Households | 2012 |
| Summit Stage & Events Limited | Administrative & support | 2026 |
| Surrey Development Property Ltd | Real estate | 2020 |
| Survai Ltd | Professional & scientific | 2025 |
| Susan Deborahs Ltd | Manufacturing | 2020 |
| SW1 Scaffolding Services Ltd | Construction | 2020 |
| Sweetman Gold Ltd | Wholesale & retail | 2015 |
| Sweetman Property Ltd | Real estate | 2018 |
| Swing Rite Golf Limited | Arts & recreation | 1999 |
| T.Abina Ltd | Wholesale & retail | 2022 |
| T.S. Paving Limited | Construction | 2007 |
| Tandridge IT Systems Limited | Information & communication | 2022 |
| Tapenbase Limited | Information & communication | 2003 |
| Tech Results Limited | Information & communication | 2019 |
| Tecnet Services Limited | Professional & scientific | 1992 |
| Temo Holdings Limited | Financial services | 2018 |
| Temo Properties Limited | Real estate | 2018 |
| THE Angel School (Islington) Management Company Limited | Households | 2005 |
| THE Aspen Vale (Maple) Management Company Limited | Households | 1998 |
| THE Birdhurst Trust Limited | Households | 2006 |
| THE Botanical Life Ltd | Wholesale & retail | 2025 |
| THE Chestnuts RTM Company Limited | Households | 2011 |
| THE Clone FMC Ltd | Households | 2020 |
| THE Drainage Repair Company Ltd | Water & waste | 2013 |
| THE DTK Group Ltd | Construction | 2025 |
| THE Fair Voice Engine Ltd | Health & social care | 2026 |
| THE Lady Golf Store Limited | Wholesale & retail | 2008 |
| THE London Musicals Company Limited | Extraterritorial | 1994 |
| THE Manor Estates (2022) Ltd | Households | 2022 |
| THE Mayesbrook Gardens (Barking) NO.1 Residents Company Limited | Households | 1990 |
| THE Mayesbrook Gardens (Barking) NO.2 Residents Company Limited | Households | 1990 |
| THE Modern Heirloom Ltd | Wholesale & retail | 2025 |
| THE Pavilions Estate Company Limited | Households | 2008 |
| THE Pavilions Flat Management Limited | Households | 2008 |
| THE Radio Company (UK) LLP | | 2011 |
| THE Residents Management (57/77 PPR) Company Limited | Households | 1987 |
| THE Ruby Dolls | Arts & recreation | 2013 |
| THE Sweat Project Ltd | Arts & recreation | 2026 |