| 5 Leamington Park Limited | Households | 2022 |
| 5 Leathwaite Limited | Households | 2023 |
| 5 Lymington Road Limited | Households | 1992 |
| 5 Lysias Road RTM Company Limited | Households | 2021 |
| 5 Macaulay Road Limited | Hospitality | 2004 |
| 5 Madeley LLP | | 2024 |
| 5 Magazine Limited | Information & communication | 2013 |
| 5 Manor Avenue Freehold Limited | Households | 2020 |
| 5 Manor Park RTM Company Limited | Households | 2007 |
| 5 Merchant Square (General Partner) Limited | Construction | 2006 |
| 5 Merchant Square (Nominee) Limited | Construction | 2006 |
| 5 Merchant Square Limited Partnership | | 2006 |
| 5 Merchant Square Tenant Limited | Real estate | 2017 |
| 5 Miles Ahead Trailer Music Ltd | Information & communication | 2022 |
| 5 Miles Easy Ltd | Information & communication | 2024 |
| 5 Milton Road Limited | Real estate | 2018 |
| 5 Minster Road Management Company Limited | Hospitality | 2003 |
| 5 Moat Street Opco Limited | Professional & scientific | 2022 |
| 5 Moat Street Propco Limited | Professional & scientific | 2019 |
| 5 Mornington Limited | Real estate | 2007 |
| 5 MUS AVE Ltd | Real estate | 2021 |
| 5 Nelson Ltd | Real estate | 2025 |
| 5 Netherby Road RTE (Freehold) Company Limited | Households | 2005 |
| 5 Nevern Road Management Company Limited | Households | 1986 |
| 5 Newton Road (Management Company) Limited | Households | 2025 |
| 5 Nimrod Passage Limited | Real estate | 2007 |
| 5 Nines Construction Ltd | Construction | 2019 |
| 5 North Avenue RTM Company Limited | Households | 2012 |
| 5 North Common Road Limited | Households | 2002 |
| 5 Oakfield Road Freehold Limited | Households | 2018 |
| 5 Oakhill Road Management Company Limited | Households | 2015 |
| 5 Oakley Road Limited | Households | 2010 |
| 5 Oberstein Road Freehold Limited | Households | 2014 |
| 5 Orange Ltd | Professional & scientific | 2026 |
| 5 Ovington Square Limited | Households | 2001 |
| 5 PAK Traders Ltd | Wholesale & retail | 2022 |
| 5 Palace Gate Management Limited | Real estate | 2001 |
| 5 Paper Buildings Limited | Extraterritorial | 2010 |
| 5 Paradise Gardens Limited | Real estate | 2016 |
| 5 Park Mansions Limited | Real estate | 2023 |
| 5 Park Road North Ltd | Households | 2023 |
| 5 Park Road TW Limited | Real estate | 2020 |
| 5 Pearl Assets Limited | Real estate | 2023 |
| 5 Pembridge Crescent Limited | Households | 2006 |
| 5 Penywern Road Limited | Households | 2014 |
| 5 Perham Road Residents Association Limited | Other services | 1999 |
| 5 Phase Ltd | Professional & scientific | 2025 |
| 5 Pillar Agency Ltd | Administrative & support | 2026 |
| 5 Pinfold Road Freeholders Limited | Households | 1995 |
| 5 Points Trading Ltd | Professional & scientific | 2022 |
| 5 Portland Place Management Company Limited | Households | 2010 |
| 5 Pratt Street Ltd | Real estate | 2023 |
| 5 Pretoria Road RTM Company Limited | Households | 2024 |
| 5 Prima RD Limited | Real estate | 2006 |
| 5 Primrose Road Limited | Households | 2020 |
| 5 Princes Gate Freehold Limited | Real estate | 2012 |
| 5 Princes Road Wimbledon Limited | Real estate | 1999 |
| 5 Radipole Road Limited | Real estate | 2022 |
| 5 Raeburn Street Limited | Real estate | 2013 |
| 5 Ralston Street Management Company Limited | Households | 1989 |
| 5 Randolph Avenue Limited | Households | 2014 |
| 5 Raynham Limited | Construction | 2016 |
| 5 Record Ltd | Arts & recreation | 2025 |
| 5 Redcliffe Gardens Ltd. | Households | 2002 |
| 5 Redcliffe Square Limited | Households | 1998 |
| 5 Redcliffe Street Limited | Households | 2011 |
| 5 Rich Joinery Ltd | Construction | 2024 |
| 5 Richmond Limited | Professional & scientific | 2025 |
| 5 Ridsdale Road Management Company Limited | Households | 2012 |
| 5 Rights Ltd | Professional & scientific | 2022 |
| 5 Rivers Accountancy Ltd | Professional & scientific | 2015 |
| 5 Rivers Energy Ltd | Energy | 2025 |
| 5 Roderick Road Management Limited | Real estate | 2023 |
| 5 Rosebery Avenue Management Company Limited | Households | 2016 |
| 5 Rosemary Terrace Management Company Limited | Households | 2000 |
| 5 Rudloe Road Freehold Company Limited | Households | 2023 |
| 5 SAH Services Limited | Administrative & support | 2022 |
| 5 Sedlescombe Road Limited | Administrative & support | 2020 |
| 5 Senses Interiors Limited | Professional & scientific | 2024 |
| 5 Seymour Gardens Ltd | Real estate | 2011 |
| 5 Shamrock Freehold Limited | Households | 2021 |
| 5 Sheen Gate Gardens Limited | Households | 2017 |
| 5 Shurdington Road Freehold Ltd | Real estate | 2025 |
| 5 Sight Limited | Other services | 2023 |
| 5 Sladedale Management Company Limited | Households | 2017 |
| 5 Spanish Road RTM Company Ltd | Households | 2018 |
| 5 Spencer Road Limited | Real estate | 2025 |
| 5 Squares Management Ltd | Real estate | 2023 |
| 5 ST Andrews Road Kingsbury Limited | Professional & scientific | 1998 |
| 5 ST Helen's Crescent Freehold Limited | Households | 2013 |
| 5 ST James's Drive (Wandsworth) Ltd | Households | 2014 |
| 5 ST John's Park Limited | Real estate | 2012 |
| 5 St*R Ltd | Manufacturing | 2021 |
| 5 ST. Michael's Gardens Co. Ltd | Households | 1996 |
| 5 Stafford Terrace RTM Company Limited | Real estate | 2003 |
| 5 Stanlake Road Limited | Households | 2001 |
| 5 Stanton Road Freeholds Limited | Households | 1997 |
| 5 Star Accountants Ltd | Extraterritorial | 2022 |
| 5 Star Afghan Pizza & Grill Limited | Hospitality | 2022 |
| 5 Star Assets Ltd | Real estate | 2026 |