| 13 Lisgar Terrace Management Company Limited | Households | 2002 |
| 13 London Road Limited | Real estate | 2006 |
| 13 Ltd | Wholesale & retail | 2022 |
| 13 Lucien Road Limited | Households | 1995 |
| 13 Lymington Road Limited | Households | 2002 |
| 13 Malvern Road Limited | Households | 2006 |
| 13 Management LP | | 2020 |
| 13 Mandela Street Freehold Limited | Real estate | 2025 |
| 13 Manor Park Management Company Ltd | Households | 2015 |
| 13 Marlborough Road Limited | Professional & scientific | 2010 |
| 13 Melrose Road Freeholders Limited | Real estate | 1992 |
| 13 MGA Ltd | Real estate | 2020 |
| 13 Montagu Place Management Ltd | Households | 2014 |
| 13 Moons Ltd | Wholesale & retail | 2021 |
| 13 Neighbours Limited | Real estate | 2021 |
| 13 New Beginnings Ltd | Information & communication | 2021 |
| 13 Northbourne Road Limited | Households | 2007 |
| 13 Northington Street Limited | Households | 1999 |
| 13 Oakbury Road Ltd | Households | 2018 |
| 13 Oakhill Road Management Company Limited | Real estate | 1999 |
| 13 Oberstein Road Limited | Households | 2020 |
| 13 Oseney Crescent Freehold Ltd | Households | 2015 |
| 13 Oxberry Avenue Freehold Limited | Households | 2023 |
| 13 Palace Gate Management Limited | Real estate | 2001 |
| 13 Palmerston Freehold Limited | Households | 2018 |
| 13 Park Hall Road RTM Company Limited | Households | 2020 |
| 13 Penn Road Residents Limited | Households | 2002 |
| 13 Perham Road Limited | Households | 1996 |
| 13 Pond Street Management Limited | Households | 1997 |
| 13 Poplar Grove RTM Company Ltd | Real estate | 2022 |
| 13 Porchester Road Management Limited | Real estate | 2021 |
| 13 Property Holdings Ltd | Real estate | 2026 |
| 13 Queen Anne's Grove Limited | Real estate | 2008 |
| 13 Queen's Avenue Management Limited | Households | 1987 |
| 13 Queen's Gate Gardens Management Company Limited | Households | 2006 |
| 13 Queensborough Terrace Limited | Households | 2006 |
| 13 Ramsay Road, Management Limited | Households | 2002 |
| 13 Recreation Road Limited | Other services | 2023 |
| 13 Redburn Street Limited | Real estate | 2024 |
| 13 Redcliffe Square Limited | Households | 1997 |
| 13 Regents Park Road Management Company Limited | Households | 2012 |
| 13 Reighton Road Ltd | Administrative & support | 2017 |
| 13 Rhythms Limited | Administrative & support | 2018 |
| 13 Ridge Road Limited | Households | 2011 |
| 13 Rita Road Limited | Real estate | 2018 |
| 13 Rivers Trust | Health & social care | 2014 |
| 13 Roehampton Lane Ltd | Households | 2018 |
| 13 Romney Street Ltd | Real estate | 2018 |
| 13 Romola Road Management Limited | Households | 1990 |
| 13 Roses Ltd | Other services | 2023 |
| 13 Rydal Street L5 Limited | Real estate | 2022 |
| 13 RYE Hill Park Management Limited | Real estate | 1982 |
| 13 Sangora Road (Freehold) Limited | Households | 2016 |
| 13 SH Limited | Professional & scientific | 2025 |
| 13 Sinclair Road Limited | Households | 2014 |
| 13 Soho Square Propco Limited | Real estate | 2025 |
| 13 South Hill Park Gardens Freehold Limited | Real estate | 2009 |
| 13 South Saint Andrew Street Ltd | Wholesale & retail | 2016 |
| 13 ST Georges Drive Freehold Limited | Households | 2018 |
| 13 ST John's Park Blackheath Limited | Households | 2006 |
| 13 ST Luke's Avenue Limited | Real estate | 2005 |
| 13 ST Thomas Gardens RTM Limited | Real estate | 2006 |
| 13 ST. George's Drive Limited | Households | 1982 |
| 13 ST. Margaret's Road SE4 Limited | Real estate | 2005 |
| 13 ST. Mary's Terrace Limited | Households | 1991 |
| 13 Stanhope Road Limited | Households | 2004 |
| 13 Stanlake Villas (Freehold) Limited | Households | 2018 |
| 13 Staverton Road NW2 5EY Limited | Households | 1999 |
| 13 Stavordale Road Management Limited | Households | 2009 |
| 13 Steele's Road Management Limited | Households | 1996 |
| 13 Steerforth ST Management Company Limited | Real estate | 2019 |
| 13 Stirling Ltd | Real estate | 2025 |
| 13 Strathblaine Road Limited | Households | 2006 |
| 13 Sunny Gardens Road Limited | Real estate | 2004 |
| 13 Surrendale Place (London W9) Limited | Extraterritorial | 2011 |
| 13 Sutton Court Road Limited | Extraterritorial | 2001 |
| 13 Sylvan Hill Residents Management Services Ltd | Real estate | 2012 |
| 13 Things Ltd | Professional & scientific | 2014 |
| 13 Thurlow Park Road Limited | Real estate | 2014 |
| 13 to 14 Star Street Limited | Households | 2011 |
| 13 to 18 ST Mary's Mansions Limited | Households | 1996 |
| 13 Together Ltd | Real estate | 2023 |
| 13 Trafalgar Avenue Limited | Extraterritorial | 2015 |
| 13 Trebovir Road RTM Company Ltd | Households | 2026 |
| 13 Trees Ltd | Wholesale & retail | 2024 |
| 13 Ulundi Road Limited | Households | 2003 |
| 13 Upper Park Road (Freehold) Limited | Households | 2018 |
| 13 Vardens Road Limited | Real estate | 2025 |
| 13 Vera Road Management Limited | Households | 2013 |
| 13 Versailles Road Limited | Households | 2022 |
| 13 Warrington Crescent Limited | Households | 1985 |
| 13 Waxlow Road Ltd | Real estate | 2021 |
| 13 Wellness Group Ltd | Arts & recreation | 2026 |
| 13 West Lane Ltd | Real estate | 2016 |
| 13 Westbere Road Management Limited | Real estate | 1996 |
| 13 Westbourne Park Road (Management) Limited | Households | 1984 |
| 13 Weston Park N8 Limited | Administrative & support | 2000 |
| 13 Wetherby Gardens Management Company Limited | Households | 2002 |
| 13 Wilton Crescent (RTM) Limited | Households | 2009 |
| 13 Wilton Crescent Freehold Limited | Households | 2024 |