| 15 Property Ltd | Real estate | 2016 |
| 15 QGT Ltd | Real estate | 2026 |
| 15 Queen's Avenue Management Company Limited | Extraterritorial | 1987 |
| 15 Queen’S Gate Terrace Ltd | Real estate | 2026 |
| 15 Rampart Street RTM Company Limited | Households | 2025 |
| 15 Redburn Street Limited | Real estate | 2000 |
| 15 Redcliffe Square Co Limited | Real estate | 1997 |
| 15 Redcliffe Street Freehold Limited | Households | 2006 |
| 15 Richborne Terrace (Freehold) Limited | Households | 2014 |
| 15 Ridge Road Limited | Households | 1994 |
| 15 Rockley Road Management Limited | Households | 1994 |
| 15 Rondu Road Limited | Households | 2017 |
| 15 Rosendale Road London Limited | Real estate | 2014 |
| 15 Rostrevor Road Limited | Households | 1994 |
| 15 Rowan Crescent Ltd | Real estate | 2021 |
| 15 Russell Gardens Mews Ltd | Real estate | 2020 |
| 15 Saltoun Road Limited | Hospitality | 2001 |
| 15 Saltram Crescent Limited | Households | 2003 |
| 15 Savernake Road Limited | Households | 2008 |
| 15 Second Avenue Management Company Limited | Real estate | 2019 |
| 15 Sheet Street RTM Company Limited | Households | 2026 |
| 15 Sherborne Gardens RTM Company Limited | Households | 2014 |
| 15 Shpg Management Co. Limited | Real estate | 2009 |
| 15 Sisters Avenue Limited | Households | 2007 |
| 15 Spenser Road Tenants Management Company Limited | Real estate | 2003 |
| 15 Square Meter Ltd | Construction | 2019 |
| 15 ST Augustines Road Limited | Households | 2025 |
| 15 ST Davids Ltd | Real estate | 2025 |
| 15 ST Davids Road Ltd | Real estate | 2025 |
| 15 ST Marks Rise Management Services Ltd | Households | 2023 |
| 15 ST Mary's Terrace Limited | Households | 2011 |
| 15 ST Ursula Grove Ltd | Real estate | 2018 |
| 15 ST. Georges Square Limited | Households | 1986 |
| 15 ST. Germans Place (NO.2) Limited | Other services | 1990 |
| 15 ST. Julian's Farm Road Limited | Professional & scientific | 2002 |
| 15 Stanhope Road Freehold Limited | Extraterritorial | 2020 |
| 15 Stanley Gardens Service Company Limited | Households | 1983 |
| 15 Stanwick Road Freehold Limited | Households | 2020 |
| 15 Stradbroke Road Management Company Limited | Other services | 2013 |
| 15 Streathbourne Road Limited | Households | 1999 |
| 15 Sunninghill Road Limited | Households | 1999 |
| 15 Sutherland Avenue Freehold Limited | Households | 2020 |
| 15 Sutton Court Road Management Company Limited | Households | 1980 |
| 15 Talbot Road Limited | Real estate | 2000 |
| 15 Tell Grove Limited | Households | 2016 |
| 15 the Broadway Limited | Hospitality | 2021 |
| 15 the Park Freehold Limited | Professional & scientific | 2025 |
| 15 the Ridgeway Tenants Association Limited | Real estate | 1997 |
| 15 the Underwood Limited | Real estate | 2025 |
| 15 Theobalds Road Management Limited | Households | 2002 |
| 15 Thorney Hedge Road Residents Limited | Real estate | 1996 |
| 15 Thornsett Road London Management Company Limited | Households | 2018 |
| 15 Thornton Hill Limited | Households | 2005 |
| 15 Thurlow Road Limited | Households | 2001 |
| 15 Tite Street Freehold Limited | Extraterritorial | 2015 |
| 15 to 17 Mersey Road Ltd | Real estate | 2023 |
| 15 to 23A Graces Road Freehold Company Limited | Households | 2018 |
| 15 Tower Terrace Limited | Professional & scientific | 2010 |
| 15 Treport Street Limited | Households | 1987 |
| 15 Tressillian Road Limited | Households | 2000 |
| 15 Trevelyan Road Management Company Limited | Real estate | 2018 |
| 15 Turle Road Freehold Company Limited | Administrative & support | 2004 |
| 15 Upper Bridge Road Residents Limited | Real estate | 2018 |
| 15 Valkyrie Road RTM Company Limited | Households | 2008 |
| 15 Vicarage Crescent London Limited | Professional & scientific | 2013 |
| 15 Wallace Road Management Limited | Households | 2025 |
| 15 Warwick Road Limited | Households | 2017 |
| 15 Well Walk Limited | Administrative & support | 2006 |
| 15 Wentworth Road RTM Company Limited | Real estate | 2018 |
| 15 West BK (Freehold) Management Company Limited | Real estate | 2018 |
| 15 Westbourne Gardens Limited | Households | 1999 |
| 15 Westbourne Terrace Road Limited | Households | 2006 |
| 15 Wetherby Gardens Limited | Households | 1998 |
| 15 White Hart Lane (Management) Company Limited | Households | 1999 |
| 15 Whitefriars Crescent RTM Company Limited | Households | 2006 |
| 15 Whiteley Road Limited | Households | 2015 |
| 15 Whittingstall Road Limited | Households | 1984 |
| 15 WHP Ltd | Households | 2024 |
| 15 Windmill Road Residents Ltd | Households | 2012 |
| 15 Winston Road Limited | Households | 2000 |
| 15 Woodfield Avenue Streatham Management Company Limited | Households | 1982 |
| 15 Woodstock Grove Limited | Real estate | 2009 |
| 15 Wyndham Avenue RTM Company Limited | Households | 2013 |
| 15 Wyneham Road Management Limited | Real estate | 2006 |
| 15&16 Venetian Road Freehold Limited | Households | 2017 |
| 15&8 Property Investment Ltd | Financial services | 2025 |
| 15, Freegrove Road Limited | Households | 1985 |
| 15, Holmdale Road Limited | Households | 1979 |
| 15-17 Dyne Road Freehold Company Limited | Households | 2007 |
| 15-17 Redchurch Street London Limited | Households | 2019 |
| 15-17 ST Peters Road RTM Company Limited | Households | 2020 |
| 15-17 West Hill Limited | Households | 2024 |
| 15-17 West Hill RTM Company Limited | Households | 2020 |
| 15-18 Coniston Close Freehold Limited | Real estate | 2020 |
| 15-19 Sandford Gardens RTM Company Limited | Households | 2026 |
| 15-22 Gandon Vale RTM Company Limited | Households | 2026 |
| 15-25 Echo Heights RTM Company Limited | Households | 2011 |
| 15/15A Gambetta Street Freehold Limited | Households | 2018 |
| 15/16 Myddelton Square Limited | Real estate | 2004 |
| 15/16 Queen's Gardens Management Limited | Real estate | 1991 |