| 15 Credenhill Street Freehold Limited | Households | 2026 |
| 15 Crescent Road (N8) Limited | Households | 1997 |
| 15 Cricklade Avenue RTM Company Limited | Households | 2016 |
| 15 Cromwell Grove Limited | Hospitality | 2016 |
| 15 Cromwell Road RTM Company Limited | Households | 2018 |
| 15 Crouch Hall Road Freehold Company Limited | Households | 2024 |
| 15 Cumberland Park Management Limited | Real estate | 1994 |
| 15 Denmark Avenue (Freehold) Limited | Real estate | 2017 |
| 15 Denning Road Management Company Limited | Real estate | 1996 |
| 15 Deronda Road Freehold Limited | Households | 2013 |
| 15 Eade Road Limited | Administrative & support | 2004 |
| 15 Eastern Esplanade Freehold Ltd | Households | 2023 |
| 15 Elsham Road Limited | Households | 2006 |
| 15 ES Limited | Households | 2015 |
| 15 ES Nominee (Holdings) Limited | Professional & scientific | 2015 |
| 15 ES Nominee Limited | Professional & scientific | 2015 |
| 15 Essex Grove, London SE19 3SX Limited | Real estate | 2022 |
| 15 Evershot Road Limited | Extraterritorial | 2011 |
| 15 Fife Road Ltd | Construction | 2019 |
| 15 Firth Gardens Freehold Limited | Households | 2008 |
| 15 Fitzjohn's Avenue Limited | Professional & scientific | 1966 |
| 15 Fitzjohns Avenue Freehold Limited | Real estate | 2020 |
| 15 FM Limited | Energy | 2012 |
| 15 Gillespie Road Limited | Households | 2011 |
| 15 Girdlers Road Limited | Households | 2000 |
| 15 Gledhow Gardens Freehold Limited | Households | 2010 |
| 15 Gloucester Drive Management Company Limited | Households | 2006 |
| 15 Gordon Place Limited | Households | 2017 |
| 15 Goulton Road RTM Company Ltd | Other services | 2013 |
| 15 Grams Limited | Wholesale & retail | 2019 |
| 15 Grand Parade Ltd | Health & social care | 2023 |
| 15 Great James Street Limited | Real estate | 2015 |
| 15 Great Percy Street Limited | Households | 2005 |
| 15 Greencroft Freehold Limited | Real estate | 2012 |
| 15 Grosvenor Place (Bath) Limited | Households | 1989 |
| 15 Grosvenor Road (Freehold) Limited | Real estate | 2011 |
| 15 GT Limited | Households | 1994 |
| 15 Gunter Grove Limited | Households | 2008 |
| 15 Hafer Road Management Company Limited | Households | 2010 |
| 15 Halfpenny LDN Limited | Real estate | 2019 |
| 15 Hanley Road Right to Manage Company Limited | Administrative & support | 2010 |
| 15 Hargrave Road RTM Company Limited | Households | 2025 |
| 15 HAY Hill Management Limited | Households | 1992 |
| 15 Hayles Street (RTM) Company Limited | Real estate | 2010 |
| 15 Healey Street Limited | Real estate | 1988 |
| 15 Helix Road Freehold Limited | Real estate | 2019 |
| 15 Henshaw Street Limited | Real estate | 2023 |
| 15 Hermon Hill RTM Company Limited | Households | 2020 |
| 15 Hillside Road Limited | Administrative & support | 2007 |
| 15 Hitherfield Road RTM Company Limited | Households | 2024 |
| 15 Hoxton Market Limited | Real estate | 2026 |
| 15 HQ Limited | Professional & scientific | 2024 |
| 15 Huntsman Road Ltd | Real estate | 2025 |
| 15 Hyde Park Square (Freehold) Limited | Real estate | 1998 |
| 15 Hyde Park Square Limited | Real estate | 1982 |
| 15 Kempshott Road Freehold Limited | Households | 2014 |
| 15 KER Limited | Households | 2020 |
| 15 Kestrel Avenue Limited | Households | 2018 |
| 15 Kingscroft Road Management Company Limited | Households | 2013 |
| 15 Kitto Road RTM Company Limited | Households | 2017 |
| 15 Langdon Park Road Management Company Limited | Administrative & support | 2012 |
| 15 Langland Gardens Freehold Company Limited | Households | 2003 |
| 15 Lanhill Road RTM Company Limited | Households | 2014 |
| 15 Laverstoke Invest Ltd | Real estate | 2024 |
| 15 LHG Limited | Professional & scientific | 1990 |
| 15 Limes Grove Limited | Households | 2017 |
| 15 Lockmead Ltd | Real estate | 2022 |
| 15 Longton Avenue Limited | Households | 2007 |
| 15 Loraine Road Limited | Households | 2016 |
| 15 Lyndhurst Road Freehold Limited | Households | 2006 |
| 15 Malvern Road Management Limited | Households | 2017 |
| 15 Manor Mount SE23 Management Company Limited | Households | 2004 |
| 15 Marketing Limited | Information & communication | 2009 |
| 15 Marloes Road Limited | Real estate | 1988 |
| 15 Marmion Road (Freehold) Limited | Households | 1998 |
| 15 Methley Street RTM Company Limited | Households | 2008 |
| 15 Methuen Park Management Company Limited | Households | 2000 |
| 15 Montagu Square Freehold Limited | Extraterritorial | 2008 |
| 15 Montagu Square Limited | Households | 1989 |
| 15 Mount Pleasant Villas Limited | Households | 1994 |
| 15 Navarino Road RTM Company Limited | Households | 2019 |
| 15 Needham Road Freehold Limited | Real estate | 2009 |
| 15 Neville Road RTM Company Limited | Administrative & support | 2012 |
| 15 NKR RTM Company Ltd | Households | 2021 |
| 15 North Common Road Ealing Limited | Households | 1996 |
| 15 North Park Residents Company Limited | Households | 2017 |
| 15 North Villas Management Company Limited | Households | 1987 |
| 15 Northbrook Road Freehold Company Limited | Real estate | 2014 |
| 15 Norwood Road Limited | Hospitality | 2026 |
| 15 Oliver Grove Residents Company Limited | Extraterritorial | 2012 |
| 15 Oval Road Limited | Real estate | 2010 |
| 15 Palace Gardens Terrace Limited | Households | 1981 |
| 15 Palace Gate Management Limited | Households | 2001 |
| 15 Pantiles Ltd | Health & social care | 2018 |
| 15 Parliament Hill Limited | Households | 2007 |
| 15 Peak Hill Gardens Ltd | Households | 2018 |
| 15 Percy Road Freehold Limited | Professional & scientific | 2008 |
| 15 Portman Square Management Company Limited | Professional & scientific | 1987 |
| 15 Powd Management Company Limited | Households | 2023 |
| 15 Princeton Court Limited | Real estate | 2014 |