| 80 to 90 (Even) South Hill Park LLP | | 2026 |
| 80 Tollington Park Freehold Limited | Households | 2024 |
| 80 Twenty Consultancy Holdings Limited | Professional & scientific | 2013 |
| 80 Twenty Consultancy Limited | Financial services | 2005 |
| 80 Union Road Limited | Households | 2016 |
| 80 Waldemar Avenue Management Limited | Households | 2014 |
| 80 Warriner Gardens Limited | Extraterritorial | 2008 |
| 80 Woodland Rise Management Company Limited | Extraterritorial | 1996 |
| 80&EIGHT Ltd | Wholesale & retail | 2022 |
| 80'S Baby Music Ltd | Information & communication | 2021 |
| 80,000 Hours Foundation | Education | 2024 |
| 80,000 Hours Limited | Education | 2024 |
| 80-20 Shops Ltd | Wholesale & retail | 2021 |
| 80-82 Cadogan Place Limited | Real estate | 2009 |
| 80-85 TCR Holdings Limited | Financial services | 2026 |
| 80-85 TCR Properties Limited | Real estate | 2026 |
| 80/20 Rule Ltd | Wholesale & retail | 2025 |
| 80/80A Morning Lane Limited | Real estate | 2016 |
| 80/82 Carlton Hill Limited | Real estate | 2011 |
| 80000 Voices CIC | Arts & recreation | 2018 |
| 8008 Bikinis Ltd | Manufacturing | 2025 |
| 800LB Gorilla Studio Limited | Wholesale & retail | 2026 |
| 800X Limited | Information & communication | 2024 |
| 8020 AI Ltd | Professional & scientific | 2024 |
| 8020 Films Ltd | Information & communication | 2021 |
| 8020 Holdings Limited | Other services | 2025 |
| 8020 IM Solutions Ltd | Wholesale & retail | 2017 |
| 8020 SLG Limited | Public administration | 2023 |
| 8020BPM Limited | Information & communication | 2009 |
| 8020LIFE&STYLE Ltd | Arts & recreation | 2022 |
| 8020PROJECTS Ltd | Professional & scientific | 2022 |
| 804 E-Commerce Ltd | Wholesale & retail | 2025 |
| 804 PAK Limited | Information & communication | 2025 |
| 805 BYK Limited | Construction | 2024 |
| 805 Fulham Road Management Company Limited | Households | 2000 |
| 805 Limited | Construction | 2021 |
| 808 Bikers Repair - Bodyshop Ltd | Wholesale & retail | 2025 |
| 808 Innovate Ltd | Wholesale & retail | 2017 |
| 808 Innovation Ltd | Professional & scientific | 2025 |
| 808 Investments Ltd | Financial services | 2024 |
| 8082 Limited | Professional & scientific | 2026 |
| 80A Belvedere Road Management Company Limited | Households | 1974 |
| 80DST Health & Wellness Limited | Wholesale & retail | 2023 |
| 80DST Limited | Real estate | 2022 |
| 80HD Meam Ltd | Manufacturing | 2022 |
| 80S Kiddo Limited | Wholesale & retail | 2024 |
| 81 - 83 Mount Pleasant Lane (Management) Limited | Real estate | 2015 |
| 81 Abingdon Road (Oxford) Management Limited | Real estate | 2007 |
| 81 Albemarle Road Limited | Extraterritorial | 2004 |
| 81 Alderney Street Residents Association Limited | Households | 1997 |
| 81 Amarco Circuit Limited | Professional & scientific | 2015 |
| 81 Audley Road Freehold Limited | Households | 2020 |
| 81 Barnsbury Street N.1. Limited | Professional & scientific | 1976 |
| 81 Belgrave Road Management Limited | Households | 2000 |
| 81 Belsize Park Gardens Limited | Real estate | 2009 |
| 81 Belsize Park Gardens Residential Limited | Real estate | 2026 |
| 81 Benwell Road RTM Company Ltd | Households | 2025 |
| 81 Beresford Ltd | Real estate | 2020 |
| 81 Brondesbury Road Limited | Extraterritorial | 1998 |
| 81 Byne Road Freehold Limited | Households | 2015 |
| 81 Cadogan Place Management Company Limited | Households | 1989 |
| 81 Churchfield Road Management Company Limited | Real estate | 2001 |
| 81 Cumberland Street Ltd | Households | 2005 |
| 81 Dean Street Limited | Real estate | 2016 |
| 81 Devonshire Road Forest Hill Limited | Households | 2015 |
| 81 Drakefield Road Ltd | Households | 2021 |
| 81 Dunsmure Estates Ltd | Real estate | 2020 |
| 81 Dunsmure Road (Freehold) Limited | Real estate | 2010 |
| 81 Elizabeth Avenue Limited | Households | 2014 |
| 81 Exchange Group Limited | Information & communication | 2025 |
| 81 Fitzjohns Avenue Limited | Administrative & support | 2005 |
| 81 Gloucester Street Freehold Limited | Households | 2013 |
| 81 Greencroft Gardens Limited | Households | 1998 |
| 81 Grosvenor Avenue Limited | Households | 2010 |
| 81 Hartham Road N7 Limited | Real estate | 2002 |
| 81 Hervey Road RTM Company Limited | Households | 2024 |
| 81 Highbury Hill (Freehold) Limited | Real estate | 2020 |
| 81 Highbury New Park Limited | Households | 1989 |
| 81 Higher Drive Limited | Construction | 2018 |
| 81 Ingelow Road Management Limited | Households | 1991 |
| 81 Lacy Road Limited | Households | 2010 |
| 81 Lausanne Road Limited | Households | 2012 |
| 81 Lewisham Way New Cross (Management) Limited | Households | 2017 |
| 81 Lichfield Grove Freehold Limited | Real estate | 2018 |
| 81 Mysore Road (Management Company) Ltd | Real estate | 1998 |
| 81 Nightingale Lane Limited | Construction | 2015 |
| 81 Oxford Gardens RTM Company Limited | Households | 2013 |
| 81 Park Hill Freehold Limited | Households | 2009 |
| 81 Paulet Road SE5 9HW Limited | Households | 2010 |
| 81 Petersham Road Limited | Households | 2012 |
| 81 Priory Limited | Real estate | 2015 |
| 81 Priory Road Limited | Households | 2011 |
| 81 Productions Ltd | Arts & recreation | 2026 |
| 81 Queens Drive RTE Company Limited | Households | 2005 |
| 81 Ribblesdale Road Ltd | Households | 2015 |
| 81 Saltram Ltd | Real estate | 2021 |
| 81 Shepherds Hill (Freehold) Limited | Households | 2001 |
| 81 Shirland Road Limited | Households | 2001 |
| 81 South Hill Park Management Company Limited | Households | 1992 |
| 81 Sports Services Limited | Financial services | 2020 |