| 1 Force Fitness Ltd | Arts & recreation | 2023 |
| 10 Arundel Terrace Brighton Limited | Households | 2010 |
| 10 Moat Croft Road (Eastbourne) Freehold Company Limited | Real estate | 2016 |
| 10629160 Ltd. | Agriculture & fishing | 2017 |
| 179 Hillcrest Road Management Company Limited | Households | 2019 |
| 18 Esplanade Seaford Residents Limited | Households | 2005 |
| 18 Meads Street Ltd | Administrative & support | 2009 |
| 18 New Steine Brighton Limited | Households | 2007 |
| 19 Roundhill Crescent (Brighton) Limited | Households | 2007 |
| 206 South Coast Road Management Company Limited | Households | 2008 |
| 22 Enys Road RTM Company Limited | Households | 2016 |
| 22 Pelham Road Limited | Real estate | 2006 |
| 22 ST Aubyns Hove (Freehold) Limited | Households | 2018 |
| 246 South Coast Road (Peacehaven) Limited | Households | 1987 |
| 26 Cromwell Road RTM Company Limited | Households | 2019 |
| 27 Brunswick Place Hove Limited | Households | 2005 |
| 28 Earl Street (Hastings) Limited | Households | 2018 |
| 28 Eversfield Road (Freehold) Limited | Households | 2023 |
| 30 Argyle Road (Brighton) Limited | Households | 2008 |
| 31 Wilbury Road RTM Company Limited | Households | 2023 |
| 33 Wilbury Road Limited | Households | 2011 |
| 333 Accountants Limited | Professional & scientific | 2026 |
| 34 Meeching Road RTM Company Limited | Households | 2024 |
| 36 Cavendish Place (Eastbourne) Limited | Households | 2022 |
| 360 Care and Support Ltd | Health & social care | 2023 |
| 40 Meeching Road Management Company Ltd | Households | 2020 |
| 44 Brunswick Square Limited | Households | 1998 |
| 45 Elphick Road RTM Company Limited | Households | 2021 |
| 46 Selborne Road (Hove) Ltd | Households | 2011 |
| 48 Brunswick Place Hove RTM Company Limited | Households | 2021 |
| 4M Garage Equipment Ltd | Manufacturing | 2026 |
| 556TRADING Ltd | Manufacturing | 2024 |
| 56 York Road Residents Association Limited | Households | 1998 |
| 60 Claremont Road Seaford Freehold Limited | Households | 2013 |
| 65 Montpelier Road (Brighton) RTM Company Limited | Households | 2020 |
| 74 Marine Parade Brighton Limited | Real estate | 2000 |
| 79 Enys Road Eastbourne Limited | Real estate | 2019 |
| 8 Burlington Street Brighton Limited | Households | 2004 |
| 8 Selborne Road (Hove) Limited | Real estate | 2001 |
| 8X8 Property Services Ltd | Construction | 2024 |
| 9 Murray Avenue Freehold Company Limited | Households | 2025 |
| A & L Drywall Ltd | Construction | 2024 |
| A & P Patel Store Ltd | Wholesale & retail | 2026 |
| A S Haven Heating Limited | Construction | 2019 |
| A Starr Builders Ltd | Construction | 2025 |
| A&E Transfer Limited | Transport & logistics | 2018 |
| Aakdistributors.Co.Uk Ltd | Wholesale & retail | 2025 |
| Aberdale Road Residents Association Limited | Households | 2003 |
| AC Brickwork & Construction Ltd | Construction | 2020 |
| Acorn Furniture Sussex Limited | Manufacturing | 2014 |
| AD Property (Sussex) Ltd | Administrative & support | 2025 |
| Adelade Ltd | Extraterritorial | 2024 |
| Aforedable Golf Limited | Wholesale & retail | 2006 |
| African Embers BBQ Ltd | Hospitality | 2023 |
| AGM Hrisbuild Ltd | Construction | 2026 |
| Airport Eagles Ltd | Transport & logistics | 2022 |
| Alarian Limited | Administrative & support | 2004 |
| Albion Bluebird Carpentry Ltd | Manufacturing | 2026 |
| Aleyvale Limited | Households | 1989 |
| Alfriston Court Management (1987) Limited | Households | 1987 |
| Algodriven Ltd | Information & communication | 2012 |
| Alistair Milne Economics Consultancy Limited | Professional & scientific | 2009 |
| ALL OUT Copy Ltd | Professional & scientific | 2020 |
| Allmotion Hydraulics Group Ltd | Extraterritorial | 2022 |
| Allwesupplyuk Limited | Wholesale & retail | 2018 |
| Alpha Seven Consulting Limited | Professional & scientific | 2016 |
| ALW Property Investments (South East) Ltd | Real estate | 2020 |
| ALW Renovation & Construction Ltd | Construction | 2022 |
| Amazon Building Solutions Ltd | Construction | 2014 |
| Amelia Rowcroft Sculpture Limited | Arts & recreation | 2007 |
| AMM Cleaning Limited | Administrative & support | 2025 |
| AND BE Heard CIC | Education | 2026 |
| Andrew J Dickinson Ltd | Professional & scientific | 2023 |
| AON Product Design Ltd | Professional & scientific | 2017 |
| APG Cash Drawer UK, Ltd | Manufacturing | 2015 |
| Aphrodite Talent Ltd | Other services | 2021 |
| Appropriate Staging Limited | Manufacturing | 2013 |
| Arlington Lodge Management Limited | Households | 2004 |
| Armour South East Construction Ltd | Construction | 2025 |
| ASH Hand Carwash Ltd | Other services | 2019 |
| Ashcombe Building & Construction Ltd | Construction | 2008 |
| Ashley Electrical South East Limited | Construction | 2008 |
| Ashridge Lodge (Bexhill) RTM Company Limited | Households | 2020 |
| Associated Storage & Archiving Limited | Administrative & support | 2010 |
| Atomic Web Design Ltd | Information & communication | 2024 |
| Auspro Limited | Construction | 2024 |
| Austen Adventures Ltd | Arts & recreation | 2026 |
| Authentic Stone Ltd | Wholesale & retail | 2012 |
| Awesome Accountants Limited | Professional & scientific | 2024 |
| B Hipperson Building Contractors Ltd | Construction | 2015 |
| B R Clothing Ltd | Wholesale & retail | 2020 |
| B&H Construction and Development Ltd | Construction | 2019 |
| B-Fab Logistics Limited | Extraterritorial | 2020 |
| B-Fabuk Limited | Wholesale & retail | 2017 |
| Balcombe Court Peacehaven Limited | Households | 2001 |
| Barlow Leisure Management Limited | Agriculture & fishing | 2000 |
| Basis Removals & Storage Ltd. | Transport & logistics | 2018 |
| BB Tackle Limited | Wholesale & retail | 2016 |
| Beach Road Cafe Ltd | Hospitality | 2025 |
| Beacon Holdings SX Ltd | Financial services | 2019 |