| 13 Brackenbury Road Ltd | Households | 2018 |
| 13 Brecknock Road Limited | Real estate | 2026 |
| 13 Bromfield Street Management Company Limited | Real estate | 2005 |
| 13 Brondesbury Park Management Limited | Households | 2008 |
| 13 Brondesbury Villas Management Company Limited | Households | 1983 |
| 13 Cadogan Terrace Management Company Limited | Households | 2004 |
| 13 Campden Road (FLAT1) Limited | Real estate | 2022 |
| 13 Campden Road Freehold Ltd | Real estate | 2023 |
| 13 Campden Street Limited | Households | 2026 |
| 13 Candler Ltd | Real estate | 2024 |
| 13 Canfield Gardens Limited | Households | 2001 |
| 13 Capital Group Limited | Financial services | 2026 |
| 13 Capital Management Limited | Financial services | 2025 |
| 13 Carlton Road Limited | Households | 2021 |
| 13 Carysfort Road N8 Limited | Real estate | 2013 |
| 13 Castellain Road Limited | Real estate | 2005 |
| 13 Chapter House Management Company Limited | Real estate | 2013 |
| 13 Chaucer Crescent Ltd | Real estate | 2023 |
| 13 Chesham Place RTM Company Ltd | Households | 2015 |
| 13 Churchfield Road Management Company Limited | Households | 1991 |
| 13 Cleve Road Limited | Households | 1997 |
| 13 Clifton Road Limited | Households | 2021 |
| 13 Clifton Road RTM Company Limited | Households | 2008 |
| 13 Clothing Ltd | Wholesale & retail | 2022 |
| 13 Clouds Ltd | Real estate | 2025 |
| 13 Clyde Circus Ltd | Households | 2022 |
| 13 Coleherne Road Limited | Real estate | 2009 |
| 13 College Road Ltd | Real estate | 2022 |
| 13 Comeragh Road Limited | Households | 1998 |
| 13 Compton Terrace Limited | Households | 1998 |
| 13 Connaught Road Limited | Real estate | 2025 |
| 13 Conyers Road Freehold Ltd | Households | 2013 |
| 13 Cornwall Crescent London Limited | Extraterritorial | 2015 |
| 13 Cromer Road Freehold Limited | Real estate | 2016 |
| 13 Crossfield Limited | Households | 2018 |
| 13 Crowther Road RTM Company Limited | Households | 2013 |
| 13 Delaford Limited | Households | 2017 |
| 13 Delia Street Wandsworth Limited | Real estate | 2015 |
| 13 Denning Road Freehold Ltd | Real estate | 2025 |
| 13 Denver Limited | Real estate | 2021 |
| 13 Diamonds Ltd | Wholesale & retail | 2024 |
| 13 Dorset Road Limited | Real estate | 1999 |
| 13 Draycott Avenue Freehold Limited | Households | 2014 |
| 13 Dream Limited | Wholesale & retail | 2025 |
| 13 Durham Terrace Limited | Households | 2001 |
| 13 Eade Road Freehold Limited | Households | 2018 |
| 13 Eardley Crescent Limited | Households | 2016 |
| 13 Earl's Court Square (Management) Limited | Households | 1999 |
| 13 Editing Ltd | Information & communication | 2018 |
| 13 Elvaston Place Limited | Households | 1997 |
| 13 Ennismore Avenue Limited | Extraterritorial | 1986 |
| 13 Eustace Road Management Limited | Households | 2019 |
| 13 Exeter Road Management Company Ltd | Real estate | 1997 |
| 13 Express Limited | Wholesale & retail | 2022 |
| 13 Fairfield Road Residents Management Company Limited | Households | 2005 |
| 13 Fordwych Road Freehold Limited | Households | 2014 |
| 13 Frames Limited | Arts & recreation | 2021 |
| 13 Franklin Street Ltd | Real estate | 2018 |
| 13 Frithville Gardens Management Ltd | Households | 2021 |
| 13 Fulham Park Gardens Ltd | Real estate | 2023 |
| 13 Gascony Avenue Freehold Ltd | Real estate | 2015 |
| 13 Gaskarth Road Management Limited | Households | 2008 |
| 13 Gladstone Terrace RTM Company Limited | Households | 2008 |
| 13 Gleneagle Road RTM Company Limited | Real estate | 2009 |
| 13 Glenton Management RTM Company Limited | Households | 2010 |
| 13 Going on 30 Musical Ltd | Arts & recreation | 2024 |
| 13 Great Western Road (Freehold) Limited | Households | 2016 |
| 13 Greyhound Road Management Limited | Households | 2020 |
| 13 Grosvenor Gardens Management Ltd | Households | 2019 |
| 13 Grosvenor Road RTM Company Limited | Households | 2022 |
| 13 Grovelands N13 Limited | Households | 2023 |
| 13 Halesworth Road Management Limited | Households | 2013 |
| 13 Hampden Road N8 Limited | Households | 2010 |
| 13 Harecourt Road Limited | Real estate | 1993 |
| 13 Hatton Place Limited | Households | 2016 |
| 13 Healey Street Freehold Limited | Households | 2015 |
| 13 Heath Drive Limited | Real estate | 1996 |
| 13 Heathland Ltd | Real estate | 2019 |
| 13 Holland Park Limited | Construction | 2015 |
| 13 Homefield RD Ltd | Households | 2025 |
| 13 Horton Road Freehold Limited | Households | 2024 |
| 13 Humbolt Road Limited | Households | 2003 |
| 13 Hungerford Road RTM Company Limited | Households | 2008 |
| 13 Hyde Park Square Limited | Households | 1982 |
| 13 Investment Management Limited | Financial services | 2025 |
| 13 Investments Ltd | Financial services | 2023 |
| 13 Iverson Road Freehold Company Limited | Households | 2008 |
| 13 Jeffreys Road Management Company Limited | Real estate | 1998 |
| 13 Jews Walk Tenants Association Limited | Households | 2001 |
| 13 John Campbell Road RTM Company Ltd | Households | 2021 |
| 13 Keith Grove Management Company Limited | Households | 2000 |
| 13 Kilmarsh Road (Management) Limited | Households | 2004 |
| 13 Kings Grove RTM Company Ltd | Real estate | 2021 |
| 13 KWW Residents Association Limited | Households | 2003 |
| 13 Lambourn Road SW4 Limited | Extraterritorial | 2013 |
| 13 Lanark Road Limited | Hospitality | 1984 |
| 13 Laurier Road Limited | Households | 1996 |
| 13 Lennox Gardens Limited | Households | 2010 |
| 13 Lennox Gardens RTM Company Limited | Households | 2007 |
| 13 Lindfield Gardens Limited | Households | 2020 |