| 54 Glenloch Road Limited | Households | 2005 |
| 54 Gloucester Road Limited | Households | 2013 |
| 54 Goldsboro Road Freehold Limited | Extraterritorial | 2007 |
| 54 Gordon Road Management Company Limited | Households | 2026 |
| 54 Hampden Road RTM Company Limited | Households | 2022 |
| 54 Hanley Road Freehold Ltd | Households | 2011 |
| 54 Harley Street Academy Ltd | Education | 2023 |
| 54 Harwood Road Management Company Limited | Households | 1999 |
| 54 Hearts Ltd | Wholesale & retail | 2016 |
| 54 Hill House Road (Freehold) Limited | Households | 2017 |
| 54 Hillcrest Road W3 Management Ltd | Households | 2017 |
| 54 Hogarth Road, London, SW5 Management Limited | Households | 1992 |
| 54 Holloway Road Limited | Construction | 2015 |
| 54 Holmdale Road Limited | Professional & scientific | 1993 |
| 54 Impactec Holdings Ltd | Financial services | 2025 |
| 54 Isis Street Management Ltd | Households | 2007 |
| 54 Kensington Court Management Company Limited | Households | 2008 |
| 54 Kenwyn Road Freehold Limited | Households | 2007 |
| 54 KHR Primrose RTM Company Limited | Households | 2018 |
| 54 Lavender Gardens Residents Company Limited | Households | 1998 |
| 54 Lennox Gardens Freehold Limited | Households | 2007 |
| 54 Lilford Road (Freehold) Limited | Households | 2017 |
| 54 London Live Limited | Information & communication | 2017 |
| 54 Lower High Street Shirehampton Ltd | Financial services | 2024 |
| 54 Mapperley Ltd | Real estate | 2024 |
| 54 Mount Pleasant Road RTM Company Limited | Extraterritorial | 2014 |
| 54 MPS Ltd | Administrative & support | 2020 |
| 54 Mullbery Ltd | Real estate | 2024 |
| 54 Norfolk Road Freehold Limited | Real estate | 2013 |
| 54 Northway Ltd | Households | 2026 |
| 54 Oakhurst Grove Limited | Households | 2011 |
| 54 Oakley Street Freehold Company Limited | Households | 2018 |
| 54 Ockendon Road RTM Company Limited | Households | 2023 |
| 54 Offley Road RTM Company Limited | Households | 2010 |
| 54 Offord Road Ltd | Households | 2021 |
| 54 Palace Gardens Terrace Management Company Limited | Households | 1986 |
| 54 Parkhill Road Limited | Households | 2018 |
| 54 Parkhill Road Right to Manage Company Limited | Real estate | 2014 |
| 54 Penywern Road (Freehold) Limited | Real estate | 2006 |
| 54 Porchester Place Limited | Construction | 2017 |
| 54 Prime Selection Limited | Wholesale & retail | 2004 |
| 54 Queens Gardens Freehold Limited | Households | 2005 |
| 54 Queensgate Terrace Residents Association Ltd. | Professional & scientific | 1993 |
| 54 Regent Road Management Company Limited | Real estate | 2007 |
| 54 Retail Ltd | Wholesale & retail | 2025 |
| 54 Rostrevor Road Limited | Households | 2011 |
| 54 Sandringham Road Management Limited | Real estate | 2008 |
| 54 Shorrolds Road Management Company Limited | Households | 2019 |
| 54 South Ealing Road Limited | Real estate | 2023 |
| 54 Space Ltd | Wholesale & retail | 2023 |
| 54 ST Lukes Avenue Limited | Households | 2005 |
| 54 ST. Johns Park Management Co. Limited | Households | 2000 |
| 54 Station Road Management Company Limited | Real estate | 2005 |
| 54 Stop Shop Ltd | Wholesale & retail | 2025 |
| 54 Streathbourne Road Ltd | Households | 2022 |
| 54 Tachbrook Street Freehold Limited | Households | 2019 |
| 54 Thicket Road Management Limited | Households | 2003 |
| 54 Thurlow Road Freehold Limited | Households | 2026 |
| 54 Trevelyan Road Limited | Real estate | 1996 |
| 54 Warriner Garden RTM Company Limited | Households | 2024 |
| 54 Warwick Square Limited | Hospitality | 1991 |
| 54 Westbere Management Company Ltd | Households | 2008 |
| 54 Whateley Road SE22 9DD Limited | Households | 2021 |
| 54 Woodhouse Road Freehold Limited | Real estate | 2019 |
| 54 Woodside Property Management Ltd | Households | 2019 |
| 54-56 Albert Road Limited | Households | 2005 |
| 54-56 Glenhurst Road Ltd | Real estate | 2020 |
| 54-56 Knatchbull Road Residents Company | Households | 2015 |
| 54-56 Old Street Limited | Real estate | 2014 |
| 54-56 Percy Road Company Limited | Administrative & support | 2015 |
| 54-57 Denton Street Limited | Households | 2021 |
| 54/56 Battersea High Street Freehold Company Limited | Households | 2011 |
| 54/56 Upperton Road Management Company Limited | Households | 2023 |
| 540 SO Limited | Extraterritorial | 2014 |
| 540 World LLP | | 2019 |
| 541 Electrical Limited | Construction | 2025 |
| 541START Ltd | Information & communication | 2026 |
| 542 Digital Limited | Information & communication | 2015 |
| 542 SHR Ltd | Real estate | 2023 |
| 54321 Limited | Other services | 2025 |
| 545 Chiswick High Road Limited | Households | 1995 |
| 545 Old York Road Limited | Real estate | 2019 |
| 5451 Ltd | Wholesale & retail | 2024 |
| 5456HATHAWAY Limited | Real estate | 2024 |
| 546 / 548 High Road Leyton Limited | Households | 2017 |
| 546 Developments Ltd | Construction | 2018 |
| 547549 Ltd | Real estate | 2020 |
| 548 UK Investment Holdings Limited | Energy | 2022 |
| 549 Home Ltd | Hospitality | 2025 |
| 549 Lordship Lane RTM Company Limited | Households | 2024 |
| 549 Old Kent Road (London) Management Company Limited | Real estate | 1999 |
| 54:17 Hair Care Limited | Other services | 2025 |
| 54A Tooting High Street Ltd | Real estate | 2024 |
| 54B Axminster Limited | Real estate | 2022 |
| 54BPG RTM Company Limited | Real estate | 2012 |
| 54C Freehold Ltd | Households | 2025 |
| 54GRID Limited | Wholesale & retail | 2025 |
| 54KFRD Limited | Financial services | 2026 |
| 54SR Capital Ltd | Real estate | 2026 |
| 54STUDIOS Global Limited | Arts & recreation | 2026 |