| 23 Belgrave Road (Colwyn Bay) RTM Company Limited | Households | 2017 |
| 23 Belgrave Road RTM Company Limited | Households | 2008 |
| 23 Belsize Square Management Limited | Households | 2004 |
| 23 Bennett Park Limited | Households | 2003 |
| 23 Beverley Road RTM Company Limited | Other services | 2011 |
| 23 Bishopsbridge Road Management Company Limited | Households | 1982 |
| 23 Bolton Gardens SW5 (Management) Limited | Households | 2002 |
| 23 Brackenbury Road Ltd | Extraterritorial | 2011 |
| 23 Bracknell Gardens Limited | Real estate | 1990 |
| 23 Bramley Hill Limited | Households | 2007 |
| 23 Brand Group E-Commerce Ltd | Wholesale & retail | 2026 |
| 23 Bromells Road Ltd. | Households | 2003 |
| 23 Buckland Crescent Limited | Real estate | 2019 |
| 23 Burnbury Road Limited | Professional & scientific | 1996 |
| 23 Burnley Road Company Ltd | Households | 2010 |
| 23 Burton Road RTM Company Ltd | Households | 2024 |
| 23 Caldervale Road Management Company Limited | Hospitality | 2006 |
| 23 Canfield Gardens Residents Limited | Real estate | 2019 |
| 23 Cannon Place Limited | Households | 2020 |
| 23 Capital Sports Limited | Administrative & support | 2025 |
| 23 Castellain Road Limited | Households | 2013 |
| 23 Cavendish Road RTM Company Limited | Households | 2025 |
| 23 Chantrey Road Management Company Limited | Households | 1993 |
| 23 Chatsworth Gardens Limited | Households | 1993 |
| 23 Chepstow Road, London Limited | Households | 1990 |
| 23 Chestnut Road Management Limited | Households | 2011 |
| 23 Chestnut Road RTM Company Limited | Households | 2010 |
| 23 Chichester Road Limited | Administrative & support | 2017 |
| 23 Church Lane Management Limited | Households | 1989 |
| 23 Churchfield Road Management Limited | Households | 1989 |
| 23 Clanricarde Gardens (Freehold) Limited | Households | 2015 |
| 23 Cobham Road Limited | Households | 2013 |
| 23 Collective Ltd | Real estate | 2025 |
| 23 College Cross Limited | Households | 2004 |
| 23 Copenhagen Street LLP | | 2021 |
| 23 Cranwich Limited | Real estate | 2019 |
| 23 Crawford Road Limited | Households | 2014 |
| 23 Crouch Hall Road Limited | Households | 2000 |
| 23 Dartmouth Park Hill (Freehold) Limited | Households | 2009 |
| 23 Deans Buildings Management Ltd | Extraterritorial | 2006 |
| 23 Dollis AVE Freehold Ltd | Professional & scientific | 2016 |
| 23 Eagle Wharf Ltd | Real estate | 2022 |
| 23 Eardley Road Limited Limited | Real estate | 2020 |
| 23 Edge Limited | Arts & recreation | 2026 |
| 23 Elgin Crescent Freehold Company Limited | Households | 2007 |
| 23 Ellerslie Road Management Company Limited | Households | 2024 |
| 23 Endymion Road Limited | Real estate | 2011 |
| 23 Equity Limited | Financial services | 2026 |
| 23 Exeter Road Ltd | Extraterritorial | 2012 |
| 23 Eylewood Road Management Company Limited | Households | 2025 |
| 23 Fairbridge Road Limited | Households | 2014 |
| 23 Feenan Highway (Tilbury) RTM Company Limited | Real estate | 2018 |
| 23 Ferndale Road Management Company Limited | Households | 2016 |
| 23 Fernhead Road W9 3EU Limited | Households | 2014 |
| 23 Films Limited | Information & communication | 2005 |
| 23 Finance Limited | Financial services | 2025 |
| 23 Finsbury Park Road N4 2LA Limited | Real estate | 2002 |
| 23 Fitzjohn's Avenue Limited | Real estate | 2008 |
| 23 Fordwych Road Management Company Limited | Real estate | 2025 |
| 23 Formation Music Limited | Wholesale & retail | 2019 |
| 23 Foxwood Ltd | Real estate | 2019 |
| 23 Frames Limited | Real estate | 2025 |
| 23 Frognal Management Company Limited | Real estate | 1996 |
| 23 Gautrey Road Limited | Households | 2018 |
| 23 Golders Green Crescent Management Company Limited | Households | 2020 |
| 23 Goldhurst Terrace (Freehold) Limited | Households | 2011 |
| 23 Goodge Place Limited | Households | 2004 |
| 23 GR Management Limited | Other services | 2021 |
| 23 Greencroft Gardens Company Limited | Households | 1996 |
| 23 Group London Limited | Professional & scientific | 2024 |
| 23 Grove Road Management RTM Company Limited | Real estate | 2015 |
| 23 Hampstead Hill Gardens Ltd | Households | 2016 |
| 23 Handforth Road London Limited | Households | 2015 |
| 23 Highgate West Hill (Freehold) Ltd | Households | 2013 |
| 23 Highgate Westhill Management Limited | Real estate | 2006 |
| 23 Hillfield Park N10 Limited | Households | 2007 |
| 23 Holberton Gardens Ltd | Extraterritorial | 2011 |
| 23 Holding Group Ltd | Wholesale & retail | 2022 |
| 23 Holdings Ltd | Financial services | 2025 |
| 23 Holly Park Limited | Households | 2015 |
| 23 Hollycroft Avenue (Freehold) Ltd | Households | 2024 |
| 23 Homestead Road Limited | Households | 2009 |
| 23 Hopton Road RTM Company Limited | Households | 2019 |
| 23 Humbolt Road Ltd | Real estate | 2019 |
| 23 Hunnid Int'L Limited | Wholesale & retail | 2025 |
| 23 Huntington Street Freehold Ltd | Real estate | 2016 |
| 23 Influence Limited | Administrative & support | 2025 |
| 23 Inverness Limited | Real estate | 2019 |
| 23 Jerningham Road RTM Company Limited | Households | 2005 |
| 23 Jersey Limited | Real estate | 2021 |
| 23 Kempsford Gardens Limited | Households | 2009 |
| 23 Kent Catering Limited | Hospitality | 2018 |
| 23 Kestrel AVE Management Company Limited | Households | 2026 |
| 23 Khama Road Management Company Limited | Households | 2014 |
| 23 KHR Freehold Limited | Real estate | 2015 |
| 23 Kohat Road Limited | Real estate | 2023 |
| 23 Langland Gardens Limited | Real estate | 1995 |
| 23 Langside Avenue Management Limited | Households | 2023 |
| 23 Lascotts Road N22 Limited | Real estate | 2003 |
| 23 Legal & Consulting Ltd | Professional & scientific | 2023 |