| 525 Finchley Road (Freehold) Limited | Real estate | 1989 |
| 525 Selfdrive Ltd | Administrative & support | 2025 |
| 525, Finchley Road Limited | Real estate | 1978 |
| 527 Seven Sisters Ltd | Real estate | 2021 |
| 528 Games Ltd | Information & communication | 2019 |
| 528 Nation Limited | Professional & scientific | 2022 |
| 529 Holloway Road Limited | Real estate | 2001 |
| 52A Cunningham Ltd | Real estate | 2025 |
| 52A ST. Helen's Gardens Limited | Households | 2001 |
| 52BANGLA Media UK CIC | Education | 2024 |
| 52MAGAZINE Limited | Information & communication | 2014 |
| 52ND Brands Ltd | Information & communication | 2022 |
| 52PS Old Trafford Ltd | Real estate | 2025 |
| 52TPR Limited | Households | 2012 |
| 52WHC Limited | Real estate | 2015 |
| 52WR RTM Company Limited | Households | 2023 |
| 53 - 59 Robinson Road RTM Company Limited | Households | 2005 |
| 53 32 Limited | Hospitality | 2018 |
| 53 Aberdare Limited | Households | 2024 |
| 53 Abingdon Road Limited | Real estate | 2023 |
| 53 Achilles Road Management Company Limited | Real estate | 2015 |
| 53 Ainger Road RTM Company Limited | Households | 2016 |
| 53 Alderney Street Freehold Ltd | Households | 2009 |
| 53 ALL Saints Road & 1 Hanover Road Management Limited | Households | 2016 |
| 53 Argyle Road Management Company Limited | Households | 1996 |
| 53 Aylesford Street Limited | Real estate | 2007 |
| 53 Babington Road Limited | Households | 2003 |
| 53 Barton Freehold Ltd | Real estate | 2024 |
| 53 Beauty Studio Ltd | Other services | 2022 |
| 53 Bedford Road Limited | Households | 2013 |
| 53 Blomfield Road Limited | Administrative & support | 2015 |
| 53 Brailsford Road RTM Company Limited | Households | 2014 |
| 53 Bridge View Management Company Limited | Households | 2014 |
| 53 Brownlow Road Management Company Limited | Households | 1983 |
| 53 Carysfort Road London Ltd | Real estate | 2019 |
| 53 Casewick Road Freehold Limited | Households | 2019 |
| 53 Cathcart Road Limited | Extraterritorial | 2023 |
| 53 Chelsham Road Limited | Extraterritorial | 2000 |
| 53 Chepstow Road London W2 Limited | Households | 2000 |
| 53 Christchurch Avenue (Freehold) Limited | Households | 2012 |
| 53 Cicada Road Management Limited | Households | 2002 |
| 53 Clapham Common North Side Limited | Households | 2021 |
| 53 Clapton Common Management Company Limited | Households | 1980 |
| 53 Courtfield Gardens Limited | Real estate | 1994 |
| 53 Cranhurst Road (Freehold) Limited | Extraterritorial | 2014 |
| 53 Crewdson Road Limited | Households | 2022 |
| 53 Defoe Road Management Company Limited | Households | 2011 |
| 53 Degrees Capital Limited | Other services | 2019 |
| 53 Degrees Digital Ltd | Information & communication | 2018 |
| 53 Devonport Road Management Company Limited | Real estate | 2004 |
| 53 Dukes Avenue (Management Company) Limited | Households | 2006 |
| 53 Eagle Road Freehold Limited | Real estate | 2025 |
| 53 Eaton Place Limited | Households | 2016 |
| 53 Egerton Crescent Ltd | Construction | 2025 |
| 53 Elmer Road Freehold Limited | Households | 2023 |
| 53 Endymion Road London SW2 (Freehold) Limited | Households | 2011 |
| 53 Englands Lane Limited | Households | 2001 |
| 53 Fallsbrook Road Management Ltd | Real estate | 2012 |
| 53 Farley Road RTM Company Limited | Real estate | 2013 |
| 53 Finchley Lane Ltd | Households | 2021 |
| 53 First Avenue Ltd | Real estate | 2023 |
| 53 Fobbing Ltd | Hospitality | 2022 |
| 53 Fordwych Road Freehold Limited | Households | 2014 |
| 53 French Ltd | Real estate | 2025 |
| 53 Frognal Management Limited | Households | 1992 |
| 53 Fulham Park Gardens Limited | Households | 2001 |
| 53 Gipsy Hill Residents Limited | Real estate | 2022 |
| 53 Gleneldon Road Management Company Limited | Households | 1988 |
| 53 Grafton Road Limited | Real estate | 1995 |
| 53 Graham Road Limited | Households | 2014 |
| 53 Grove Park Road Management Ltd | Households | 2008 |
| 53 Gunterstone Road Freehold Limited | Households | 2024 |
| 53 Hartland Ltd | Real estate | 2025 |
| 53 Hartland Road Limited | Households | 2013 |
| 53 Heygate Avenue RTM Company Limited | Households | 2013 |
| 53 Hilldrop Road Management Company Limited | Households | 2016 |
| 53 Hollycroft Avenue Management Limited | Households | 1983 |
| 53 Howitt Road Management Company Limited | Real estate | 1992 |
| 53 Humbolt Road Freehold Company Limited | Households | 2024 |
| 53 Kenninghall Road Limited | Households | 2018 |
| 53 Kings Road Limited | Households | 2012 |
| 53 Leathwaite Road RTM Company Limited | Households | 2018 |
| 53 Lechmere Road Limited | Real estate | 1988 |
| 53 Liddon Road Ltd | Real estate | 2017 |
| 53 Lupus Street Limited | Households | 2010 |
| 53 Lyham Road Limited | Households | 2025 |
| 53 Lynn Ltd | Real estate | 2018 |
| 53 Manor Avenue Limited | Households | 2003 |
| 53 Marischal Road Ltd | Households | 2016 |
| 53 Median Road Limited | Households | 2016 |
| 53 Moscow Road Limited | Real estate | 2002 |
| 53 Motors Ltd | Wholesale & retail | 2018 |
| 53 Mount Pleasant Villas Right to Manage Company Limited | Households | 2012 |
| 53 North END Road Limited | Households | 1996 |
| 53 Oakley Road Freehold Limited | Households | 2023 |
| 53 Onslow Gardens Limited | Households | 2004 |
| 53 PA Ltd | Households | 2020 |
| 53 Palace Gardens Terrace Limited | Households | 2022 |
| 53 Parliament Hill Management Limited | Real estate | 1976 |
| 53 Priory Road Freehold Limited | Households | 2025 |