| Battle Youth Zone [BYZ] CIC | Health & social care | 2026 |
| Bavarian Motorsport Southeast Ltd | Wholesale & retail | 2025 |
| BE Electrical South East Ltd | Construction | 2022 |
| Beam Property Investments Limited | Real estate | 2025 |
| Beardance Ltd | Arts & recreation | 2019 |
| Beauty With Balance Limited | Other services | 2025 |
| Beckett Property Management (Sussex) Ltd | Real estate | 2024 |
| BEE Habitat Heroes Ltd | Extraterritorial | 2026 |
| Beechdown Group Ltd | Financial services | 2016 |
| Beijing Diner Takeaway Limited | Hospitality | 2025 |
| Belle-Ve Bricks Limited | Wholesale & retail | 2022 |
| Bentleys & Ruth Properties Ltd | Real estate | 2026 |
| BEX Gaming Ltd | Wholesale & retail | 2015 |
| Bexhill Steelworks Limited | Manufacturing | 2005 |
| Bexhill to LET Limited | Real estate | 2012 |
| Biasblue Limited | Professional & scientific | 2016 |
| Bids & Projects Navigation Ltd | Professional & scientific | 2024 |
| Bill Bate Ltd | Construction | 2005 |
| Biomedical Computing Limited | Information & communication | 1996 |
| Birdcage Lighting Limited | Information & communication | 2007 |
| Blackbrooks Garden Centres Limited | Wholesale & retail | 2019 |
| Blackshed Project Space CIC | Arts & recreation | 2024 |
| Blender Moon Ltd | Administrative & support | 2015 |
| Blue Fish Battle Limited | Hospitality | 2023 |
| Blue Ridge Accounting Services Ltd | Professional & scientific | 2021 |
| Blue Ridge Designs Limited | Professional & scientific | 2006 |
| Blue Sea Media Limited | Information & communication | 2022 |
| Bluebell Coppice Ltd | Hospitality | 2023 |
| Blueberry Public Relations Ltd | Administrative & support | 2008 |
| Bonney's Limited | Hospitality | 2017 |
| Bookable Ltd | Administrative & support | 2019 |
| Brambleon Ltd | Information & communication | 2025 |
| Brass Foundry Castings Limited | Wholesale & retail | 2003 |
| Brave Software Limited | Information & communication | 2012 |
| Bravomax Services Limited | Administrative & support | 2008 |
| Brewster Black Brands Limited | Hospitality | 2024 |
| Bridge Educational Services Ltd | Education | 2021 |
| Bridges Bank (Shoreham) Management Limited | Households | 2008 |
| Bright Sparks - Partners in Training Ltd | Professional & scientific | 2002 |
| Brincat Developments Limited | Construction | 2023 |
| Brit Design Brit Made Limited | Wholesale & retail | 2002 |
| Buckhurst Holdings Limited | Real estate | 2020 |
| Bunny and Belle Limited | Wholesale & retail | 2013 |
| Burnes Vale Management Company Limited | Households | 2000 |
| Butter Cross Lane Ltd | Administrative & support | 2022 |
| Butterflies Therapy & Coaching C.I.C. | Health & social care | 2012 |
| Buxton House Ltd | Professional & scientific | 2024 |
| C & E Sargent Limited | Real estate | 2022 |
| C Gilbert Construction Ltd | Construction | 2022 |
| C K L Developments Limited | Wholesale & retail | 1998 |
| C L R Finance Limited | Real estate | 2018 |
| C.B.Dawes Limited | Wholesale & retail | 1972 |
| C.R. Child LLP | | 2007 |
| Cads Holdings LLP | | 2022 |
| Cafe Loco (LRD) Ltd | Hospitality | 2024 |
| Calme Living Ltd | Households | 2026 |
| Cambridge Gardens College Ltd | Education | 2024 |
| Care Matters (S.E.) Limited | Health & social care | 2013 |
| Carlton & Associates Limited | Professional & scientific | 2010 |
| Carne Griffiths Ltd | Wholesale & retail | 2014 |
| Carter Automotive Centres Limited | Wholesale & retail | 2007 |
| Castle Mouldings GRP Limited | Construction | 2022 |
| Cayman Winds Limited | Real estate | 2013 |
| Celebro Productions Ltd | Administrative & support | 2016 |
| CGT Civil Engineering Limited | Construction | 2008 |
| Channel Caravan Company Limited | Hospitality | 1960 |
| Charming Anarchist Limited | Financial services | 2021 |
| Chequers Stay Limited | Hospitality | 2019 |
| Cherry Tree Joinery Co. Ltd | Construction | 2014 |
| Cherub Construction Ltd | Construction | 2019 |
| Chipsy Kings Ltd | Hospitality | 2025 |
| Chris Lewis Jewellery Ltd | Wholesale & retail | 2022 |
| Christchurch Car Sales Limited | Wholesale & retail | 2005 |
| Ciborium Limited | Financial services | 2016 |
| Cipher Solutions Limited | Administrative & support | 2003 |
| Citida Construction Limited | Construction | 2021 |
| Civil Site Services Ltd | Professional & scientific | 2017 |
| CJC Construction (South Coast) Limited | Construction | 2019 |
| Claire L Jones Limited | Administrative & support | 2025 |
| Clarity Comps Limited | Arts & recreation | 2023 |
| Claverham House Maintenance Limited | Households | 1967 |
| Claygate Property Ltd | Real estate | 2021 |
| Climb Mount Kilimanjaro Limited | Administrative & support | 2010 |
| Clive Bishop Associates Limited | Professional & scientific | 2008 |
| Coastal Building & Landscaping Limited | Construction | 2024 |
| Coco Commercial Services Ltd | Arts & recreation | 2013 |
| Coffee Leonati Ltd | Hospitality | 2022 |
| Coleby Investments Limited | Administrative & support | 1992 |
| Colourful Ceramics Limited | Extraterritorial | 2025 |
| Comfort Assured Ltd | Extraterritorial | 2014 |
| Commercial Construction Management Limited | Construction | 2004 |
| Commercial Freight Services International Limited | Transport & logistics | 2000 |
| Complex Integration Limited | Information & communication | 2020 |
| Conqueror Construction Ltd | Construction | 2018 |
| Conquest Aircraft Group Ltd | Administrative & support | 2024 |
| Corbil Ltd | Professional & scientific | 2012 |
| CORFIELD1066 Limited | Manufacturing | 2013 |
| Cosmo Classic Motorcycles Limited | Wholesale & retail | 2002 |
| Craig Close Crowhurst Community Interest Company | Real estate | 2015 |
| Cristal Air Limited | Manufacturing | 1999 |