| 5-10 Gondar Mansions RTM Company Limited | Households | 2015 |
| 5-11 Cheyne Gardens Freehold (2011) Limited | Real estate | 2011 |
| 5-19 Passmore Street Limited | Real estate | 2021 |
| 5-2-1 Consulting Ltd | Information & communication | 2015 |
| 5-26 Cumberland Terrace Mews RTM Company Limited | Households | 2022 |
| 5-28 Colwyn Green Limited | Households | 2011 |
| 5-29 Coombe Road Management Co. Limited | Households | 2023 |
| 5-38 Wessex Court RTM Company Limited | Households | 2025 |
| 5-6 Egerton Place RTM Company Limited | Households | 2018 |
| 5-6 Park Close Ltd | Hospitality | 2024 |
| 5-6 Sheridan Court (Freehold) Limited | Households | 2017 |
| 5-7 Belgrave Gardens Freehold Limited | Real estate | 2008 |
| 5-7 Cheapside Manchester Limited | Financial services | 2017 |
| 5-7-11 Morning Lane Limited | Real estate | 2014 |
| 5-7ES Ltd | Real estate | 2025 |
| 5-8 Berry Close RTM Company Limited | Households | 2017 |
| 5-8 Brookfield Mansions Ltd | Real estate | 2009 |
| 5-8 Cranleigh Gardens Freehold Limited | Households | 2018 |
| 5-8 Hardwick Limited | Real estate | 2022 |
| 5-8 Marcus Street Limited | Households | 1999 |
| 5-8 Whetstone Close Limited | Real estate | 2011 |
| 5-9 Burdett Mews Management Company Limited | Households | 1998 |
| 5-9 City Garden ROW Limited | Construction | 2008 |
| 5-9 Lamont Road Freehold Limited | Households | 2022 |
| 5-9 OVC RTM Company Limited | Households | 2026 |
| 5-9 ST Nicholas Street Worcester Limited | Real estate | 2015 |
| 5-GRLS Incorporated Limited | Real estate | 2005 |
| 5-GRLS Link Options Ltd | Real estate | 2018 |
| 5-GRLS Portfolio Ltd | Real estate | 2018 |
| 5-MINUTE Language Limited | Education | 2023 |
| 5-STAR Housekeeping Personnel Ltd | Administrative & support | 2025 |
| 5.23 Ltd | Professional & scientific | 2011 |
| 5.30 Events Ltd | Arts & recreation | 2016 |
| 5.9 Cleaning Limited | Administrative & support | 2025 |
| 5/5A Hannen Road Limited | Real estate | 2015 |
| 5/5A Old ST Andrews Mansions Limited | Real estate | 2020 |
| 5/7 Aubert Park Management Limited | Households | 1991 |
| 5/7 Clifton Crescent (Folkestone) F/H Limited | Real estate | 2009 |
| 5/7/9/11 Glendale Drive Freehold Company Limited | Households | 2019 |
| 50 & 50A Keswick Road RTM Company Ltd | Households | 2020 |
| 50 + & Fabulous Ltd | Arts & recreation | 2025 |
| 50 Aberdare Gardens Freehold Limited | Households | 2012 |
| 50 Adys Road Limited | Households | 2015 |
| 50 Altenburg Gardens Freehold Limited | Households | 2024 |
| 50 Ambler Road Flat Owners Limited | Households | 2011 |
| 50 Ashurst Limited | Households | 2019 |
| 50 Auckland Road Limited | Households | 2020 |
| 50 Bickersteth Road RTM Company Limited | Other services | 2013 |
| 50 Birkbeck Road (W3) Freehold Management Company Limited | Households | 2020 |
| 50 Bonnington Square (RTE) Limited | Real estate | 2004 |
| 50 Brook Green Management Company Limited | Professional & scientific | 1999 |
| 50 Brook Street Limited | Real estate | 2016 |
| 50 Buchanan Limited | Real estate | 2021 |
| 50 Cadogan Place Freehold Limited | Extraterritorial | 2004 |
| 50 CAL Fit Ltd | Arts & recreation | 2024 |
| 50 Canfield Gardens Management Company Limited | Real estate | 2000 |
| 50 Carnwath Road Limited | Construction | 2013 |
| 50 Cents Media Ltd | Information & communication | 2024 |
| 50 Charleville Road Limited | Households | 2001 |
| 50 Cherington Road Management Limited | Households | 2025 |
| 50 Claverton Street Limited | Real estate | 2000 |
| 50 Clifton Gardens Limited | Real estate | 1981 |
| 50 Coolhurst Road Freehold Limited | Households | 2021 |
| 50 Cranley Gardens Limited | Households | 1996 |
| 50 Cranwich Road Limited | Hospitality | 2004 |
| 50 Craven Avenue Limited | Households | 2010 |
| 50 Crediton Hill Limited | Households | 2018 |
| 50 Crewys Road Management Co. Limited | Households | 1998 |
| 50 Cricketfield Road Limited | Real estate | 2006 |
| 50 DE Beauvoir Road Limited | Real estate | 2009 |
| 50 Degrees Incorporated Ltd | Hospitality | 2022 |
| 50 Drewstead Road Freehold Limited | Households | 2008 |
| 50 Dunlace Road Management Company Limited | Real estate | 2015 |
| 50 Dymock Street Limited | Real estate | 2011 |
| 50 Eardley Crescent Limited | Real estate | 1992 |
| 50 Eastwood Ltd | Real estate | 2023 |
| 50 Fairhazel Gardens Management Company Limited | Households | 2001 |
| 50 Feet Tall Ltd | Administrative & support | 2025 |
| 50 Fenchurch Devco Limited | Construction | 2022 |
| 50 Fenchurch General Partner Limited | Construction | 2022 |
| 50 Fenchurch JV LP | | 2022 |
| 50 Ferme Park Road Limited | Households | 2020 |
| 50 Finsbury Square Limited | Real estate | 2022 |
| 50 for Change Ltd | Education | 2025 |
| 50 Frames Limited | Information & communication | 2016 |
| 50 Fulham Park Gardens Management Ltd. | Households | 1996 |
| 50 GR Limited | Real estate | 2019 |
| 50 Granville Park Management Company Limited | Households | 2003 |
| 50 Greencroft Gardens Management Limited | Real estate | 1994 |
| 50 Guanock Ltd | Real estate | 2023 |
| 50 Hale Lane Freehold Company Limited | Households | 2024 |
| 50 Hallam Street Management Company Limited | Extraterritorial | 2010 |
| 50 Hampton Close Ltd | Real estate | 2026 |
| 50 Hans Place Freehold Limited | Households | 2007 |
| 50 Hans Place Residents Limited | Households | 1981 |
| 50 Hilldrop Road Ltd | Households | 2021 |
| 50 Holmewood Road Limited | Extraterritorial | 2009 |
| 50 HSS Limited | Real estate | 2016 |
| 50 International Limited | Information & communication | 2024 |
| 50 KAY Road Limited | Households | 2018 |