| R I G Carpentry Ltd | Construction | 2015 |
| R. Malinowski Construction Ltd | Construction | 2011 |
| Rainbowtarian Ltd | Wholesale & retail | 2024 |
| Ranger Rigging Limited | Information & communication | 2018 |
| Raven Tacticalwear Limited | Professional & scientific | 2010 |
| Real Adventures Barnet CIC | Public administration | 2026 |
| Red Phoenix Trading Ltd | Wholesale & retail | 2022 |
| Richmond Court Residents Association Limited(The) | Households | 1984 |
| Richmond Interiors Limited | Wholesale & retail | 2009 |
| Ridgeon Court (Property Management) Co. Limited | Households | 1965 |
| Ridley Fisher Limited | Information & communication | 2016 |
| Rimex International Limited | Wholesale & retail | 1984 |
| Robert Deards Limited | Real estate | 1931 |
| Robinsons Yard Residents Association Limited | Households | 2002 |
| Rock Trading Agency Ltd | Wholesale & retail | 2022 |
| Rodgers Vanbochoven Limited | Information & communication | 2010 |
| Roman Gardens Letchworth (Blocks a, B and C) Management Company Limited | Households | 1995 |
| Roman Gardens Letchworth (Blocks D, E and F) Management Company Limited | Households | 1996 |
| RPM Engineering Limited | Wholesale & retail | 2013 |
| Rumble & Hiss Limited | Information & communication | 2002 |
| S J Expediting Ltd | Administrative & support | 2023 |
| S R Line Trading Ltd | Real estate | 2016 |
| S.M.G. Management Services Limited | Professional & scientific | 1990 |
| Saba One Trading Ltd | Real estate | 2016 |
| Safdar Homes Ltd | Real estate | 2020 |
| Sarita Hair and Beauty Ltd. | Other services | 2014 |
| SBD Investments Ltd | Financial services | 2023 |
| Scorpion Recruitment Limited | Administrative & support | 2024 |
| Seyha Limited | Professional & scientific | 1973 |
| Sfa-Official Limited | Administrative & support | 2025 |
| Shoreout Services Limited | Financial services | 1994 |
| Siddhivinayak One Ltd | Real estate | 2024 |
| Signet Accounting Services Limited | Professional & scientific | 2008 |
| Silke Properties Ltd | Real estate | 2008 |
| Silky Larkoua Ltd | Information & communication | 2023 |
| Siska International Limited | Professional & scientific | 1975 |
| Siska Publishing Limited | Professional & scientific | 2007 |
| Skin London Limited | Administrative & support | 2014 |
| Slade Court Residents Limited | Professional & scientific | 1993 |
| SML Limited | Construction | 1983 |
| Somerset Associates GB Limited | Professional & scientific | 2025 |
| Sona Consultancy Ltd | Information & communication | 2017 |
| South Mimms Services Limited | Real estate | 1951 |
| Southend Property Ltd | Real estate | 2019 |
| Spectrum Forwarding Limited | Transport & logistics | 1997 |
| ST. Mirren Court Property Management Co. Limited | Households | 1964 |
| ST. Monica's Management Company (East) Limited | Households | 1976 |
| Standard Formations Limited | Professional & scientific | 2003 |
| Standard Nominees Limited | Professional & scientific | 2003 |
| Standard Registrars Limited | Professional & scientific | 2003 |
| Stephen Whiteford Limited | Agriculture & fishing | 1984 |
| Success Procurement Limited | Administrative & support | 2015 |
| Sundance Hosting Limited | Professional & scientific | 2007 |
| Tape Properties Ltd | Real estate | 2019 |
| Terry Able Safe & Locks Limited | Wholesale & retail | 2014 |
| THE G.I. Group Limited | Manufacturing | 1993 |
| THE Heathers (Block C,D) Management Company Limited | Households | 1995 |
| THE Heathers (Blocks a, B) Management Company Limited | Households | 1994 |
| THE Heathers (Blocks E,F) Management Company Limited | Households | 1995 |
| THE Purpose Hub Ltd | Professional & scientific | 2024 |
| Thunder London Ltd | Wholesale & retail | 2020 |
| Tiffin Darbaar Ltd | Hospitality | 2025 |
| Tings London Ltd | Information & communication | 2016 |
| Totteridge Manor Association Limited | Extraterritorial | 1955 |
| Townmore Construction Limited | Construction | 2024 |
| TRANSITION2ZERO Limited | Professional & scientific | 2022 |
| Treasures of Byzantium Ltd | Wholesale & retail | 2023 |
| Trentham Lodge Management Company Limited | Households | 1989 |
| TRK Global Ltd | Education | 2012 |
| Trundleys Road (Block a) Management Company Limited | Households | 1991 |
| Trundleys Road (Block B and C) Management Company Limited | Households | 1991 |
| Trundleys Road (Block D) Management Company Limited | Households | 1991 |
| Trundleys Road (Block E) Management Company Limited | Households | 1991 |
| Trundleys Road (Block F) Management Company Limited | Households | 1991 |
| Trundleys Road (Block G) Management Company Limited | Households | 1991 |
| Trundleys Road (Block H) Management Company Limited | Households | 1991 |
| UK London Lets Ltd | Real estate | 2019 |
| V3TB.EU Ltd | Information & communication | 2016 |
| Valida Company Group Ltd | Financial services | 2023 |
| Vidya Limited | Wholesale & retail | 2008 |
| Wall Property Ltd | Households | 2018 |
| Walsh Group London Limited | Professional & scientific | 2015 |
| Ware Road (Hoddesdon) Residents Association Limited | Households | 2004 |
| Ware Road Management Company (Hoddesdon) Limited | Households | 2003 |
| Weaver-Afs Ltd | Professional & scientific | 2006 |
| Well & Fair Limited | Information & communication | 2024 |
| West Development London Ltd | Administrative & support | 2013 |
| What TF Kins Ltd | Information & communication | 2024 |
| White Rose Motors Limited | Wholesale & retail | 2017 |
| Wilbury Way (Block B) Management Company Limited | Households | 1990 |
| Wilbury Way (Block E) Management Company Limited | Households | 1990 |
| Wilbury Way (Block F) Management Company Limited | Households | 1990 |
| Wilbury Way (Block H) Management Company Limited | Households | 1990 |
| Wilbury Way (Block J) Management Company Limited | Households | 1990 |
| Wilbury Way (Block L) Management Company Limited | Households | 1990 |
| Wilbury Way (Block M) Management Company Limited | Households | 1990 |
| Wilbury Way (Block N) Management Company Limited | Households | 1990 |
| Wilbury Way (Block P) Management Company Limited | Households | 1991 |
| William Brady Associates Limited | Professional & scientific | 2009 |
| Woodside Spray Finishing Ltd | Construction | 2017 |