| 42 Montpelier Street Company Limited | Households | 1992 |
| 42 Pevensey Road Worthing Limited | Households | 2012 |
| 42 Sackville Road, Hove Limited | Real estate | 2000 |
| 42 Stanford Road Limited | Households | 2012 |
| 420 Skatestore Ltd | Wholesale & retail | 2020 |
| 427 Church Road SE19 Limited | Households | 2024 |
| 42A Old Steine Apartments Limited | Households | 2025 |
| 43 Ditchling Rise (Brighton) Limited | Households | 2006 |
| 43 Highcroft Villas Management Company Limited | Households | 1992 |
| 43 New England Road RTM Company Limited | Households | 2019 |
| 43 Preston Park Avenue Residents Limited | Households | 2002 |
| 43SEVEN Limited | Professional & scientific | 2026 |
| 44 Casterton Street E8 Freehold) Limited | Households | 2018 |
| 44 Eaton Place, Brighton Limited | Households | 1998 |
| 44 Gladstone Place RTM Company Limited | Households | 2007 |
| 44 Highcroft Villas Limited | Other services | 2000 |
| 44 Lansdowne Street (Hove) Limited | Hospitality | 2005 |
| 44 Rugby Road Ltd | Real estate | 2023 |
| 45 Degree Construction & Development Ltd | Construction | 2021 |
| 45 Dials Ltd | Households | 2025 |
| 45 Grand Parade Limited | Households | 2015 |
| 45 Havelock Road (Brighton) Limited | Households | 2022 |
| 45 Lorna Road (Hove) Limited | Households | 2005 |
| 45 Marine Parade RTM Company Limited | Households | 2021 |
| 45 Richmond Street Management Company Limited | Households | 2018 |
| 45 Sisters Avenue Management Company Ltd | Households | 2026 |
| 45 Stanford Road RTM Company Limited | Households | 2017 |
| 45 York Road (Hove) Limited | Households | 1998 |
| 47 Buckingham Place (Brighton) Limited | Households | 2003 |
| 47 Buckingham Road Brighton (Management) Limited | Households | 1991 |
| 47 Eaton Place (Freehold) Limited | Households | 2012 |
| 47 Millers Road RTM Company Limited | Households | 2020 |
| 47 ST Aubyns (Hove) Limited | Households | 2002 |
| 47 Stanford Avenue (Brighton) Limited | Real estate | 2010 |
| 47 West Hill Street Limited | Households | 1998 |
| 47 Wicklands Avenue (Management) Limited | Real estate | 1988 |
| 48 & 50 Hythe Road (Brighton) Limited | Households | 2009 |
| 48 Cambridge Road Limited | Extraterritorial | 2017 |
| 48 Old Shoreham Road (Freehold) Limited | Households | 2014 |
| 48 Round Hill Crescent (Brighton) Limited | Households | 2009 |
| 48 Sussex Square, Brighton Limited | Households | 1981 |
| 48, Westhill Street Limited | Real estate | 2005 |
| 48STANFORD Limited | Households | 2008 |
| 49 Firle Road Eastbourne (Freehold) Limited | Households | 2016 |
| 49 Seville Street RTM Company Limited | Households | 2017 |
| 49 Stanford Avenue Limited | Households | 1993 |
| 49 Upper Lewes Road Brighton Limited | Households | 2010 |
| 4A Logistics Ltd | Transport & logistics | 2025 |
| 4A Tongdean Road Limited | Real estate | 2020 |
| 4DM Ltd | Information & communication | 2026 |
| 4K Marketing Limited | Wholesale & retail | 2026 |
| 4M and N Ltd | Wholesale & retail | 2023 |
| 4SQUARED Ltd | Information & communication | 2020 |
| 4SYNC AI Consultancy Ltd | Information & communication | 2026 |
| 4TENS Properties Ltd | Real estate | 2022 |
| 5 & 6 Eastern Terrace Limited | Households | 1976 |
| 5 Bedford Place Brighton BN1 2PT Limited | Households | 2011 |
| 5 Chesham Place Limited | Households | 1997 |
| 5 Clarendon Place Ltd | Households | 2019 |
| 5 Clifton Terrace Freeholders Limited | Households | 2024 |
| 5 Limited | Professional & scientific | 2002 |
| 5 Live Events Limited | Information & communication | 2023 |
| 5 Medina Terrace (Hove) Limited | Households | 2006 |
| 5 Millers Road Limited | Real estate | 2017 |
| 5 Montpelier Terrace Limited | Households | 1994 |
| 5 PPA Limited | Households | 2016 |
| 5 ST Andrews Road Portslade-By-Sea RTM Company Limited | Households | 2018 |
| 5 ST James's Avenue BN2 Freehold Limited | Real estate | 2016 |
| 5 Walpole Terrace Freeholders Limited | Households | 2014 |
| 5 Waterloo Street Limited | Administrative & support | 2005 |
| 5 Woodland Way Management Company Limited | Extraterritorial | 2011 |
| 5-7 Sillwood Street RTM Company Limited | Households | 2017 |
| 5/6 Belmont (Brighton) Limited | Administrative & support | 2004 |
| 50 Montpelier Road (Brighton) Limited | Households | 1996 |
| 50 Shades of Colour Ltd | Construction | 2025 |
| 50 Stanford Ltd | Households | 2022 |
| 50 Windmill Street (Brighton) Limited | Households | 2013 |
| 501.5 Heritage Ltd | Hospitality | 2025 |
| 51 Brunswick Square Hove (1996) Limited | Households | 1996 |
| 51 Coleridge Street (Hove) Limited | Real estate | 2020 |
| 51 Montpelier Road RTM Limited | Households | 2005 |
| 52 Brunswick Ltd | Real estate | 2024 |
| 52 Brunswick Place Limited | Real estate | 2024 |
| 52 Goldstone Road (Hove) Freehold Limited | Households | 2012 |
| 52 Highcroft Villas RTM Company Ltd | Households | 2015 |
| 52 Old Road Ltd | Households | 2026 |
| 52-58 Middle Street Brighton Limited | Construction | 2020 |
| 53 Denmark Villas Ltd | Households | 2024 |
| 53 Old Shoreham Road (Brighton) Limited | Households | 2021 |
| 53 Stanford Road Limited | Households | 2003 |
| 53 Voltaire Road Limited | Households | 2002 |
| 53-57 Ditchling Road RTM Company Limited | Households | 2017 |
| 54 Coombe Road RTM Company Limited | Households | 2016 |
| 54 Highcroft Villas Limited | Real estate | 2025 |
| 54 Lansdowne Street (Hove) Limited | Households | 2007 |
| 54 Portland Villas, Hove Limited | Real estate | 2004 |
| 54 Springfield Road (Brighton) Limited | Households | 2013 |
| 54 Warleigh Road RTM Company Limited | Households | 2010 |
| 54 Woodstock Road Limited | Real estate | 2015 |
| 545 Films Ltd | Information & communication | 2026 |