| 50 Kenninghall Road Limited | Households | 1992 |
| 50 Kingsley Road N13 Limited | Households | 2013 |
| 50 Ladbroke Grove Limited | Households | 1993 |
| 50 Laleham Road RTM Company Limited | Real estate | 2007 |
| 50 Langham Road Limited | Real estate | 2016 |
| 50 Lausanne Road Management Limited | Households | 2008 |
| 50 Leathwaite Road (Freehold) Limited | Hospitality | 2015 |
| 50 Leicester Road Limited | Households | 2008 |
| 50 Lilyville Road Management Limited | Real estate | 2003 |
| 50 Marine Parade Brighton Limited | Households | 1999 |
| 50 Mornington Terrace (Freehold) Limited | Real estate | 2014 |
| 50 Mountview Road Ltd | Households | 2020 |
| 50 Netheravon Road W4 Ltd | Real estate | 2014 |
| 50 Netherhall Gardens Limited | Households | 1993 |
| 50 Northfield Road Management Limited | Households | 2009 |
| 50 Norton Road Limited | Real estate | 2013 |
| 50 Oakfield Road Limited | Households | 2004 |
| 50 Oakhurst Grove Limited | Households | 1994 |
| 50 Pembury Road Limited | Real estate | 2005 |
| 50 Penywern Road Limited | Households | 1999 |
| 50 Percent Ltd | Professional & scientific | 2018 |
| 50 Plus Health Club Ltd | Wholesale & retail | 2026 |
| 50 Porchester Limited | Hospitality | 2024 |
| 50 Pulteney Road Ltd | Households | 2008 |
| 50 QGT Limited | Real estate | 2000 |
| 50 Radipole Road (SW6) Limited | Real estate | 2004 |
| 50 Randolph Avenue Limited | Households | 1982 |
| 50 Redan Street Ltd | Households | 2007 |
| 50 Roman Road Freehold Limited | Households | 2005 |
| 50 Rosendale Road Limited | Households | 2014 |
| 50 Rylett Crescent Limited | Households | 2016 |
| 50 Saltram Crescent Limited | Households | 2024 |
| 50 SE6 3BP Limited | Real estate | 2010 |
| 50 Shades of Graystoke Ltd | Information & communication | 2016 |
| 50 Shooters Hill Road Limited | Households | 2011 |
| 50 Sinclair Road Freehold Limited | Real estate | 2011 |
| 50 Sloane Avenue Limited | Real estate | 2017 |
| 50 Sport Limited | Information & communication | 2021 |
| 50 ST Edmund's Terrace Freehold Limited | Real estate | 2017 |
| 50 ST Gabriels Road (NW2) Ltd | Households | 2002 |
| 50 ST. Lukes Road Management Limited | Real estate | 2018 |
| 50 Steele Road Management Company Limited | Extraterritorial | 2009 |
| 50 Stockwell Road Freehold Limited | Real estate | 2008 |
| 50 Sutherland Ltd | Real estate | 2024 |
| 50 Talbot Street Limited | Real estate | 2024 |
| 50 the Vale Clinic Ltd | Health & social care | 2014 |
| 50 Thurlow Park Road Freehold Limited | Households | 2009 |
| 50 Underhill Road Limited | Households | 2000 |
| 50 Vauxhall Bridge Road Ltd | Real estate | 2024 |
| 50 Vauxhall Bridge Road SUB Ltd | Real estate | 2024 |
| 50 Walford Road Limited | Households | 2013 |
| 50 Warrington Crescent (W9) Freehold Ltd | Households | 2025 |
| 50 Warwick Gardens Limited | Households | 1981 |
| 50 West London Ltd | Households | 2025 |
| 50 Westbourne Gardens Freehold Limited | Households | 2023 |
| 50 Westbourne Gardens Residents Association Limited | Households | 1991 |
| 50 Westbridge Road Limited | Construction | 2018 |
| 50 Willes Road Limited | Administrative & support | 2017 |
| 50 Woodland Road Management Limited | Households | 2008 |
| 50 Woodsome Road Limited | Households | 2005 |
| 50 Woodstock Grove Limited | Professional & scientific | 2015 |
| 50 WR Limited | Construction | 2024 |
| 50 Years AGO Today Limited | Information & communication | 2016 |
| 50% Gray Ltd. | Information & communication | 1996 |
| 50, 52 & 52A POW Drive RTM Company Limited | Households | 2019 |
| 50-50 Group Media Advertising LLP | | 2016 |
| 50-51 Properties Limited | Real estate | 2008 |
| 50-52 Calverley Road Limited | Construction | 2022 |
| 50-52 CR Subco Limited | Construction | 2025 |
| 50-52 Warriner Gardens Limited | Real estate | 2016 |
| 50-53 Denton Street RTM Company Limited | Households | 2017 |
| 50-56 Cricklewood Broadway Management Company Limited | Households | 2015 |
| 50-56 Turney Road Management Company Ltd | Households | 2015 |
| 50-60 Station Road LP | | 2019 |
| 50-60 Station Road Nominee 1 Limited | Extraterritorial | 2019 |
| 50-60 Station Road Nominee 2 Limited | Extraterritorial | 2019 |
| 50-60 Station Road Tenant Limited | Real estate | 2018 |
| 50-60 Wedmore Street Management Company Limited | Households | 2023 |
| 50-73 Moira Court RTM Company Limited | Households | 2017 |
| 50-85 Burton Court Limited | Households | 2001 |
| 50/148 Haberdasher Street Residents Association Limited | Households | 1981 |
| 50/50 Consulting Ltd | Real estate | 2018 |
| 50/50 Education Ltd | Education | 2022 |
| 50/50 Live Limited | Arts & recreation | 2023 |
| 50/50 Media House Limited | Arts & recreation | 1990 |
| 50/50A Bickersteth Road Freehold Company Limited | Households | 2025 |
| 50/51 Queensgate Gardens Management Ltd. | Households | 1985 |
| 50/52 Glasford Street Limited | Households | 2023 |
| 50/52 Glendale Drive RTM Company Limited | Households | 2013 |
| 50/52 Lauriston Road Management Company Limited | Households | 1983 |
| 50/52 Long Lane Management Company Limited | Households | 1997 |
| 500 Club LLP | | 2025 |
| 500 Degrees Clapham South Ltd | Hospitality | 2025 |
| 500 Degrees Ferndale Road Ltd | Hospitality | 2019 |
| 500 Degrees Herne Hill Ltd | Hospitality | 2016 |
| 500 Greek Street Limited | Real estate | 2021 |
| 500 Group Limited | Construction | 2020 |
| 500 Longwater (UK) Limited | Real estate | 2019 |
| 500 Miles Consulting Ltd | Information & communication | 2018 |
| 500 Miles Limited | Professional & scientific | 2018 |