| 'ALL Aboard' Shops Limited | Health & social care | 1991 |
| (UK) Window FIX Limited | Construction | 2022 |
| 00945196 Limited | | 1969 |
| 01119794 Limited | Manufacturing | 1973 |
| 020CLOTHING Ltd | Wholesale & retail | 2024 |
| 03 Rivers Consulting Limited | Administrative & support | 2024 |
| 03262093 Limited | Professional & scientific | 1996 |
| 1 Belsize Park Gardens Limited | Real estate | 1998 |
| 1 Eighty Abodes Ltd | Real estate | 2025 |
| 1 Hereford Road W2 (Freehold) Limited | Households | 2023 |
| 1 ST Mary's Management Company Limited | Households | 2011 |
| 1 to 9 Somerset Gardens Limited | Households | 2010 |
| 1-25 Eastdown CT Management Ltd | Households | 2024 |
| 10 Hyde Park Square Limited | Households | 1983 |
| 10 Raleigh Close Freehold Limited | Real estate | 2009 |
| 10 Sydney Street Freehold Limited | Real estate | 2010 |
| 10-11 Courtfield Gardens (Freehold) Limited | Households | 2014 |
| 10-12 Hyde Park Gardens (Freehold) Limited | Households | 2010 |
| 100 PNM Ltd | Professional & scientific | 2018 |
| 100 Warwick Gardens Limited | Construction | 1995 |
| 102 Greencroft Gardens Management Limited | Real estate | 1994 |
| 106 Fitzjohns Avenue Management Limited | Real estate | 2000 |
| 106 Park Street Limited | Construction | 2022 |
| 107 North Western Avenue (Watford) Limited | Households | 2020 |
| 107 Westbourne Terrace Management Limited | Households | 1990 |
| 11 AM Holdco Ltd | Financial services | 2025 |
| 11 Cadogan Square Freehold Limited | Households | 2011 |
| 11 Hour Labs Ltd | Information & communication | 2025 |
| 11 Liston Ltd | Real estate | 2020 |
| 11 Wellington Crescent Management Company Ltd. | Households | 2015 |
| 110 Fitzjohn's Avenue Management Company Limited | Real estate | 2011 |
| 110 Services Ltd | Administrative & support | 2025 |
| 119 Sutherland Avenue Limited | Real estate | 1997 |
| 11PLUSEUPHORIA Ltd | Education | 2019 |
| 12 Goldhurst Terrace (Freehold) Ltd | Real estate | 2006 |
| 12 ST Johns Road (Watford) Limited | Households | 2024 |
| 12-14 Cleveland Square Freehold Limited | Households | 2016 |
| 12-14 Essex Road RTM Company Ltd | Real estate | 2015 |
| 123 Auto Start Ltd | Wholesale & retail | 2022 |
| 124 Lexham Gardens Limited | Households | 1999 |
| 126 Aldenham Road Ltd | Other services | 2014 |
| 12HR Ltd | Real estate | 2022 |
| 13 Avenue Road (Highgate) Limited | Households | 1986 |
| 13 Canning Crescent Limited | Households | 2003 |
| 13 Gayton Road Management Company Limited | Real estate | 2000 |
| 13 Marlborough Road Management Company Limited | Real estate | 1988 |
| 130 Fellows Road Ltd | Households | 2018 |
| 133 Durban Road West RTM Company Ltd | Households | 2023 |
| 133 Englefield Road Freeholders Limited | Real estate | 2002 |
| 135 Services Ltd | Professional & scientific | 2020 |
| 138 Fellows Road Management Limited | Real estate | 1999 |
| 14 Belsize Park Gardens RTM Company Limited | Real estate | 2009 |
| 14 Cosway Street Limited | Real estate | 2008 |
| 14 Lindfield Gardens Management Company Limited | Real estate | 2002 |
| 14 Millar Holdings Ltd | Financial services | 2022 |
| 14 Nascot Road Limited | Real estate | 2009 |
| 14 Seymour Road Management Company Limited | Households | 2007 |
| 14-16 New Cavendish Street (Management) Limited | Households | 1997 |
| 142 Water Gardens Limited | Construction | 2017 |
| 142-144 Haverstock Hill Limited | Real estate | 1999 |
| 143-155 Gloucester Terrace Limited | Real estate | 2002 |
| 144 Desserts Limited | Hospitality | 2017 |
| 144 Grill Limited | Hospitality | 2026 |
| 149 Kenhigh LLP | | 2011 |
| 15 Cheyne Place Limited | Households | 1985 |
| 15 Heath Drive Limited | Real estate | 1977 |
| 154 Realisations Limited | Information & communication | 2009 |
| 155 Hemingford Road Limited | Households | 2017 |
| 16 & 18 Harley Road RTM Company Limited | Households | 2022 |
| 16 Harcourt Terrace Limited | Households | 1997 |
| 16 Prince Arthur Road Management Company Limited | Real estate | 1997 |
| 16 Thurlow Road Limited | Households | 1998 |
| 16 Wedderburn Road (Management) Limited | Households | 1990 |
| 1618 Ltd | Financial services | 2020 |
| 17 Maresfield Management Limited | Real estate | 1992 |
| 1707 Properties Limited | Real estate | 1961 |
| 1796 Holdings Limited | Construction | 2019 |
| 1796 Projects Limited | Construction | 2024 |
| 1796 Properties Limited | Real estate | 2024 |
| 18 Belsize Square Freehold Limited | Households | 2007 |
| 18/19 Manchester Street Management Company Limited | Households | 1995 |
| 1810 Asset Management Ltd | Real estate | 2021 |
| 1810 Trading Ltd | Extraterritorial | 2024 |
| 1822 Ltd | Real estate | 2023 |
| 189 Daneglen Court Limited | Real estate | 2016 |
| 189 Sutherland Avenue Management Limited | Real estate | 1994 |
| 19-21 Randolph Crescent Limited | Real estate | 1983 |
| 19-27 (ODD) Byewaters RTM Company Ltd | Households | 2021 |
| 19/21 Marsh Lane Management Limited | Households | 1984 |
| 191 Sutherland Avenue Limited | Real estate | 1995 |
| 192 Gamma Ltd | Financial services | 2024 |
| 1968 Network Limited | Arts & recreation | 2017 |
| 197 Queen's Gate Limited | Extraterritorial | 2003 |
| 1973 Consulting Ltd | Professional & scientific | 2019 |
| 1I2US Ltd | Professional & scientific | 2017 |
| 1II CIC | Education | 2025 |
| 1NTEGRATED Ltd | Construction | 2023 |
| 1P602E-19 Ltd | Professional & scientific | 2024 |
| 1ST Management Consultancy Limited | Real estate | 1996 |
| 1ST Motorbike Repairs Limited | Wholesale & retail | 2019 |