| 20 Poynders Road Ltd | Real estate | 2012 |
| 20 Prince of Wales Terrace Limited | Households | 1988 |
| 20 PS Management Limited | Real estate | 2014 |
| 20 Qdown Drive Limited | Real estate | 2023 |
| 20 Queens Avenue Management Limited | Households | 2001 |
| 20 Queens Gate Place Freehold Limited | Households | 2009 |
| 20 Queens Terrace Freehold Co Ltd | Households | 2023 |
| 20 Rainham Road Management Limited | Real estate | 2007 |
| 20 Ramillies Road Limited | Extraterritorial | 1998 |
| 20 Ramsden Road Freehold Ltd | Households | 2020 |
| 20 Rastell Avenue Management Limited | Real estate | 2003 |
| 20 Redcliffe Gardens Management Limited | Households | 1997 |
| 20 Redcliffe Gardens RTM Company Limited | Households | 2017 |
| 20 Redfield Lane Management Limited | Households | 2013 |
| 20 Ribblesdale Road Management Limited | Households | 2002 |
| 20 Ridge Ltd | Real estate | 2022 |
| 20 Riggindale Road Limited | Extraterritorial | 2025 |
| 20 Roland Gardens Limited | Households | 1997 |
| 20 Rosary Gardens Freehold Company Limited | Professional & scientific | 2007 |
| 20 Rosary Gardens Limited | Households | 2005 |
| 20 Rosemont Road Management Limited | Households | 2004 |
| 20 Rostrevor Road Management Company Limited | Real estate | 1995 |
| 20 Saltoun Road Management Company Limited | Real estate | 2011 |
| 20 Saltram Crescent Management Ltd | Households | 2012 |
| 20 Sears Street RTM Company Limited | Households | 2022 |
| 20 Send Barns Lane Limited | Construction | 2021 |
| 20 Sharp Minds Ltd | Wholesale & retail | 2026 |
| 20 Sidney Avenue Limited | Households | 2005 |
| 20 Sixteen Limited | Professional & scientific | 2010 |
| 20 South Hill Park Gardens RTM Company Ltd | Households | 2017 |
| 20 ST Charles Square RTM Company Limited | Households | 2023 |
| 20 Stanley Crescent Limited | Households | 1994 |
| 20 Stanthorpe RD RTM Company Ltd | Households | 2020 |
| 20 Station Road LP | | 2020 |
| 20 Station Road Nominee 1 Limited | Extraterritorial | 2020 |
| 20 Station Road Nominee 2 Limited | Extraterritorial | 2020 |
| 20 Steeles Road Freehold Limited | Households | 2011 |
| 20 Stork Road Ltd | Real estate | 2024 |
| 20 Stratford Estates Ltd | Real estate | 2024 |
| 20 Streatham Common North Freehold Management Company Limited | Real estate | 2015 |
| 20 Street LP | | 2014 |
| 20 Sunderland Terrace Limited | Real estate | 1996 |
| 20 Sydenham Road Ltd | Households | 2023 |
| 20 Telecom Ltd | Information & communication | 2014 |
| 20 TEN B&M Limited | Professional & scientific | 2021 |
| 20 TEN Creative Limited | Professional & scientific | 2013 |
| 20 TEN Holdings Limited | Professional & scientific | 2020 |
| 20 TEN Invest Limited | Professional & scientific | 2021 |
| 20 the Avenue Limited | Households | 2008 |
| 20 the Highway Management Limited | Households | 1985 |
| 20 the Piazza Limited | Real estate | 2013 |
| 20 the Piazza Management Limited | Extraterritorial | 2013 |
| 20 Tregunter Road Limited | Households | 1998 |
| 20 Triton Street Limited | Construction | 2012 |
| 20 Twenty Initiative CIC | Administrative & support | 2024 |
| 20 Twenty Mgmt Ltd | Information & communication | 2023 |
| 20 Twenty Properties Ltd | Real estate | 2024 |
| 20 Upton Avenue Management Company Limited | Households | 2016 |
| 20 Varieties MP Ltd | Professional & scientific | 2025 |
| 20 Veronica Road (Freehold) Limited | Households | 2002 |
| 20 Waldegrave Road Management Company Limited | Households | 1993 |
| 20 Wallwood Road Management Company Limited | Households | 2008 |
| 20 Ways Ltd. | Administrative & support | 2014 |
| 20 Weech Road Limited | Households | 1973 |
| 20 Wellesley Road Residents Limited | Households | 1980 |
| 20 Wellfield Avenue Management Limited | Households | 2001 |
| 20 Wellmeadow Road Limited | Extraterritorial | 2015 |
| 20 Westbourne Street RTM Company Limited | Households | 2026 |
| 20 Wickham Road (Brockley) Limited | Households | 1989 |
| 20 Willoughby Road Ltd | Households | 2024 |
| 20 Wilton Crescent Limited | Households | 2005 |
| 20 Wine Street Ltd | Real estate | 2024 |
| 20&25 Luxuriant Holidays Ltd | Arts & recreation | 2026 |
| 20&UK Construction Ltd | Construction | 2025 |
| 20-20 Audio Worldwide Ltd | Information & communication | 2018 |
| 20-20 Events Management Limited | Other services | 2010 |
| 20-20 Foods Ltd | Wholesale & retail | 2018 |
| 20-20 Music Worldwide Ltd | Information & communication | 2022 |
| 20-20 Projects Limited | Other services | 2005 |
| 20-20 Recordings Ltd | Information & communication | 2007 |
| 20-20 Songwriting Limited | Information & communication | 2011 |
| 20-21 MHS Lessees Limited | Households | 2005 |
| 20-22 Balls Pond Road RTM Company Limited | Households | 2021 |
| 20-22 LL Limited | Households | 2022 |
| 20-23 Cruikshank Street Limited | Households | 2017 |
| 20-25 Clifford Court RTM Company Limited | Households | 2021 |
| 20-25 Holt Close RTM Company Limited | Households | 2013 |
| 20-25 Sandford Gardens RTM Company Limited | Households | 2026 |
| 20-27 ST Peter's Close Limited | Households | 2009 |
| 20-30 Percy Road Limited | Households | 1989 |
| 20-31 Catherine Court (Management Co.) Limited | Households | 1992 |
| 20-31 Catherine Court Freehold Limited | Real estate | 2008 |
| 20-49 Cumberland Terrace RTM Company Limited | Households | 2022 |
| 20.31 Capital Management Ltd | Financial services | 2025 |
| 20/02/2020 Ltd | Other services | 2020 |
| 20/20 LDN Ltd | Administrative & support | 2016 |
| 20/20 Sharp Vision Limited | Administrative & support | 2017 |
| 20/20 Telematics Limited | Information & communication | 2019 |
| 20/20A Albert Bridge Road Limited | Households | 2000 |
| 20/20A Astonville Street (Freehold) Limited | Hospitality | 2003 |