| Bright Develop Ltd | Construction | 2016 |
| Bright Develop MH Ltd | Construction | 2018 |
| Bright Energy Reports Ltd | Administrative & support | 2009 |
| Bright Stem Graduates Limited | Administrative & support | 2020 |
| Brightling Travel Limited | Administrative & support | 2018 |
| Brighton & Hove Financial Consultants Ltd | Financial services | 2013 |
| Brighton Rock Press Limited | Information & communication | 2016 |
| Brighton Veterinary Clinic Limited | Professional & scientific | 2025 |
| Brightrock Games Limited | Information & communication | 2015 |
| Brightside Partners Limited | Professional & scientific | 2017 |
| Brightstone Cape Limited | Health & social care | 2022 |
| Brinlack UK Ltd | Financial services | 2020 |
| Bristol Urology Group LLP | | 2022 |
| Brit Cricket Academy Limited | Arts & recreation | 2022 |
| Britannia Trading UK Limited | Professional & scientific | 2001 |
| Britson Building Ltd | Construction | 2025 |
| Britson Electrical Limited | Extraterritorial | 2015 |
| Britson Limited | Manufacturing | 2015 |
| Broad Oak Partnership Limited | Professional & scientific | 2009 |
| Broco Holdings Ltd | Real estate | 2024 |
| Broco Trading Ltd | Construction | 2024 |
| Brookland Property Holdings Ltd | Real estate | 2022 |
| Brooks Learning Ltd | Information & communication | 2018 |
| Brownii Points Ltd | Administrative & support | 2021 |
| Bruce & Co Building Contractors (Sussex) Limited | Construction | 2009 |
| Bruce Ward Investments Limited | Construction | 2024 |
| Brunger Plasterers Limited | Construction | 2010 |
| Bruno Generators UK Ltd | Financial services | 2012 |
| Bruno Power Limited | Professional & scientific | 2014 |
| BSJ Property Limited | Real estate | 2019 |
| BSJ Southern Limited | Real estate | 2015 |
| BTF Catering Ltd | Hospitality | 2022 |
| Buchanan First Properties Ltd | Real estate | 2000 |
| Buck Solutions Limited | Administrative & support | 2014 |
| Bucklers Group Ltd | Professional & scientific | 2021 |
| Bucklers Restaurant Ltd | Hospitality | 2019 |
| BUG Bashers Limited | Wholesale & retail | 2016 |
| Bulhouse Ltd | Information & communication | 2017 |
| Bulland Limited | Administrative & support | 2012 |
| Bulrush Property Ltd | Real estate | 2024 |
| Bunny Run Childcare Centre Limited | Education | 2013 |
| Burfield Park Management Limited | Real estate | 1996 |
| Burgess Estates Limited | Real estate | 2015 |
| Burn Cold Ltd | Wholesale & retail | 2025 |
| Burts Catering Butchers Ltd | Wholesale & retail | 2002 |
| Business & Trade Limited | Administrative & support | 1991 |
| Business Prize UK Limited | Information & communication | 2025 |
| Bute House Surgery Limited | Health & social care | 2023 |
| BWK Sport Limited | Extraterritorial | 2015 |
| BXL Consulting Limited | Information & communication | 2025 |
| C G Fell & Sons Limited | Wholesale & retail | 2023 |
| C Gearing & SON Limited | Administrative & support | 2006 |
| C J Roots Farming Limited | Agriculture & fishing | 2011 |
| C K Building and Construction LLP | | 2020 |
| C.& P.Development Co.(London)Limited | Manufacturing | 1951 |
| C87 Limited | Construction | 2014 |
| Cable Rock Property Ltd | Real estate | 2013 |
| Cablecraft Motion Controls Limited | Manufacturing | 2010 |
| Cabo Scaffolding Ltd | Construction | 2023 |
| Cacklebury Ltd | Wholesale & retail | 2025 |
| Cadmid Solutions Limited | Administrative & support | 2013 |
| Cadnce Sports Limited | Wholesale & retail | 2025 |
| Caedmon Medical Services. Limited | Health & social care | 2022 |
| Calcutta Bar and Restaurant Ltd | Hospitality | 2015 |
| Calderbank Medical Administrations Limited | Health & social care | 2025 |
| Callanch Ltd | Manufacturing | 2020 |
| CAM Gardens Limited | Administrative & support | 2013 |
| Cana Properties Ltd | Real estate | 2020 |
| Canadeer Ltd | Hospitality | 2023 |
| Capricornpr and Communications Limited | Other services | 2007 |
| Captivate Marketing Ltd. | Professional & scientific | 1998 |
| Car Technic Ltd | Wholesale & retail | 2016 |
| Carbon Code Group Ltd | Wholesale & retail | 2025 |
| Carbon Free Communications Ltd. | Professional & scientific | 1999 |
| Carbonfitt Ltd | Professional & scientific | 2025 |
| Cardboard KEN Ltd | Administrative & support | 2022 |
| Care Remedies Limited | Health & social care | 2009 |
| Caredig Healthcare Group LLP | | 2022 |
| Carefasttwosolution Ltd | Health & social care | 2025 |
| Carers Givers Ltd | Health & social care | 2024 |
| Carlton Sussex Limited | Real estate | 2022 |
| Carna Properties Limited | Construction | 1962 |
| Carplex Ltd | Wholesale & retail | 2023 |
| Carrick James Limited | Other services | 2021 |
| Carter Anaesthesia and Innovations Ltd | Health & social care | 2025 |
| Cartouch Ltd | Wholesale & retail | 2023 |
| Cartwheel Penny Associates Ltd | Professional & scientific | 2020 |
| Carvemore Estates Ltd | Real estate | 2025 |
| Carvemore Limited | Financial services | 2025 |
| Casaco Properties Ltd | Real estate | 2026 |
| Casper and Rufus Ltd | Wholesale & retail | 2025 |
| Castle Collective Limited | Information & communication | 2026 |
| Cat and Mouse Limited | Administrative & support | 2021 |
| Caterpoint Engineering Ltd | Manufacturing | 2022 |
| Cathexis Holdings Limited | Professional & scientific | 2024 |
| Causeway Carpentry Limited | Manufacturing | 2016 |
| Causeway Developments (Sussex) Limited | Real estate | 2011 |
| Causeway Property Rentals Limited | Real estate | 2016 |
| Cavity Tech Solutions Ltd | Construction | 2022 |
| Cbdc Holdings Limited | Financial services | 2022 |