| 10 Eriswell Road Limited | Households | 2020 |
| 108 Chatham Road (2000) Limited | Households | 2000 |
| 122 Mildmay Ltd | Households | 2023 |
| 1ST Choice Mots (Rustington) Ltd. | Wholesale & retail | 2006 |
| 69BL Residents Ltd | Households | 2023 |
| 71 South Street Limited | Households | 2023 |
| 9 JNC Ltd | Financial services | 2022 |
| 95 Clarendon Drive Management Limited | Real estate | 1986 |
| AB Hats and Accessories Holdings Limited | Financial services | 2021 |
| AB Hats and Accessories Limited | Wholesale & retail | 2017 |
| Abbots Lodge Dental Practice Limited | Health & social care | 2018 |
| Addinstyle UK Limited | Construction | 2018 |
| Adfield Electrical Limited | Construction | 2020 |
| Adfield Group Limited | Wholesale & retail | 2023 |
| Admor Dentalplus Software Ltd | Information & communication | 2003 |
| Admor Limited | Manufacturing | 1993 |
| Adur Ferry Bridge Moorings Limited | Transport & logistics | 2025 |
| Afconsulting Pro Lawyers Ltd | Professional & scientific | 2023 |
| Affordable Farewells Limited | Other services | 2026 |
| Albany Towers Hove Limited | Households | 2007 |
| Alphabrand Ltd | Extraterritorial | 2016 |
| Ameroni Commercial Ltd | Real estate | 2014 |
| Ameroni Ltd | Real estate | 2024 |
| Applewood Publishing & Digital Limited | Information & communication | 2017 |
| Archer and BOW Limited | Administrative & support | 2024 |
| Arketype Limited | Arts & recreation | 2006 |
| Arkwright Builders Limited | Construction | 1997 |
| Arms Marketing Limited | Wholesale & retail | 2011 |
| Arun C N C Limited | Manufacturing | 1988 |
| Arun Pumps Limited | Manufacturing | 1983 |
| Associated Technology (Europe) Limited | Transport & logistics | 1996 |
| Atlantean Media Ltd | Professional & scientific | 2018 |
| Atmos & Lotus Ltd | Information & communication | 2024 |
| Aubrey Bird Carpets and Flooring Ltd | Wholesale & retail | 2024 |
| Autopics Limited | Wholesale & retail | 2007 |
| Avante Care Ltd | Health & social care | 2025 |
| Badgers Foods Limited | Hospitality | 1992 |
| Baked: Cake With a Cause C.I.C. | Manufacturing | 2013 |
| Balloon and Basket Limited | Financial services | 2024 |
| Bayshore Construction Limited | Construction | 2019 |
| BB Home Solutions Limited | Construction | 2020 |
| Beckvine Trading Limited | Professional & scientific | 1996 |
| Bedhead Digital Limited | Arts & recreation | 2025 |
| Big Church Festival Limited | Health & social care | 2009 |
| Big Church Live Limited | Health & social care | 2013 |
| Blacksmith Consulting Services Ltd | Water & waste | 2022 |
| Bluesky Shoreham Ltd | Real estate | 2018 |
| Bobsiloula Catering Limited | Hospitality | 2017 |
| Bognor Podiatry Limited | Health & social care | 2025 |
| Boundary IT Services Ltd | Information & communication | 2009 |
| BREAKWATERS33 Ltd | Financial services | 2024 |
| Bridle Oak Carpentry Limited | Construction | 2003 |
| Brighton City Football Club Limited | Arts & recreation | 2011 |
| Brighton Films Ltd | Information & communication | 2017 |
| Brighton in a Box Ltd | Wholesale & retail | 2020 |
| C-Drive Software Limited | Professional & scientific | 2017 |
| Capital Roots Limited | Real estate | 2026 |
| Ccsp Properties Limited | Real estate | 2025 |
| Chalet Cafe Limited | Hospitality | 2003 |
| Chatsworth Forge Group Ltd | Manufacturing | 2013 |
| Chewing Pixels Limited | Arts & recreation | 2019 |
| Child First Limited | Health & social care | 2000 |
| Chloe's Beauty and Skin Clinic Limited | Other services | 2021 |
| CJD Promotions Limited | Wholesale & retail | 2020 |
| CM Persona Limited | Information & communication | 2019 |
| Communication International Limited | Administrative & support | 2006 |
| Connor Parsons Farrier Ltd | Agriculture & fishing | 2019 |
| D C Holmes Ltd | Professional & scientific | 2002 |
| D-Tect Fire and Security Limited | Administrative & support | 2013 |
| D-Tect Group Limited | Financial services | 2020 |
| D-Tect Temporary Security Ltd | Administrative & support | 2018 |
| D. Proudfoot Plumbing & Heating Limited | Construction | 2019 |
| Dapper Menswear Ltd. | Wholesale & retail | 2017 |
| David O'Connor Designs Limited | Professional & scientific | 2003 |
| Decaar UK Ltd | Other services | 2025 |
| Dendy Byrne Limited | Professional & scientific | 2016 |
| Dixontimothy Limited | Other services | 2008 |
| Dizzy (Retail) Community Interest Company | Administrative & support | 2005 |
| DMH Motors Limited | Wholesale & retail | 2015 |
| Dolled UP Sussex Limited | Other services | 2024 |
| Dove Tiling Limited | Construction | 2017 |
| DPS Fulfilment and Logistics Ltd | Transport & logistics | 2025 |
| Drake and Alder Ecology Limited | Professional & scientific | 2024 |
| Dualta Doherty & Partners Limited | Administrative & support | 2017 |
| DWD Windows & Doors Limited | Construction | 2009 |
| Eastonuk Limited | Professional & scientific | 2015 |
| Electrostatic Coating Services Ltd | Manufacturing | 2016 |
| Elizabeth Lawrence Limited | Professional & scientific | 2005 |
| END State Solutions Limited | Professional & scientific | 2023 |
| Evolve Construction Sussex Ltd | Construction | 2024 |
| Excel Football Academy Limited | Arts & recreation | 2025 |
| Express Pizza Rustington Ltd | Hospitality | 2023 |
| Fare Divide C.I.C. | Hospitality | 2018 |
| Farmhouse Cookery Limited | Manufacturing | 2001 |
| Fieldchrome Limited | Construction | 2015 |
| Filton Engineering Limited | Wholesale & retail | 1998 |
| Fine Designs UK Limited | Manufacturing | 2007 |
| First Propertys Limited | Construction | 2006 |
| Flag Art Limited | Administrative & support | 2025 |
| Flagship Fire and Safety Limited | Public administration | 2026 |