| Brightquote Limited | Financial services | 1989 |
| Brightword Communications Ltd | Professional & scientific | 2011 |
| Broadford Consulting Limited | Professional & scientific | 2014 |
| Broadmark Way Limited | Extraterritorial | 2013 |
| Brock and Bloom Ltd | Professional & scientific | 2025 |
| Broken Rose Ltd | Wholesale & retail | 2025 |
| Bromley Clackett Holdings Limited | Financial services | 2023 |
| Brookehwr Ltd | Professional & scientific | 2022 |
| Brooke’S Lounge Limited | Real estate | 2021 |
| Brookfield Storage Limited | Other services | 2018 |
| Brookfield Wilman Ltd | Financial services | 2011 |
| Broyle Management Company Limited | Households | 1997 |
| Brumarchs Ltd | Professional & scientific | 2026 |
| BSB Builders Ltd | Construction | 2026 |
| BSK Harvey Limited | Construction | 2020 |
| BSL Qualifications Limited | Education | 2026 |
| BSL Translation Ltd | Professional & scientific | 2019 |
| Bslcourses.Co.Uk Ltd | Education | 2011 |
| BTG Home Solutions Limited | Other services | 2014 |
| Bubble Marketing Limited | Professional & scientific | 2025 |
| Bubbly Bar Limited | Hospitality | 2022 |
| Bucksgreenfilms Ltd | Information & communication | 2007 |
| Building Brands Limited | Professional & scientific | 2007 |
| Built for Anything Limited | Arts & recreation | 2025 |
| Built UP Construction Limited | Construction | 2021 |
| Bullet Sports Management Limited | Arts & recreation | 2019 |
| Bullpro Limited | Wholesale & retail | 2025 |
| Burberry Close Management Company Limited | Households | 2018 |
| Burgan Consulting International Ltd | Information & communication | 2019 |
| Burgess House Management Company Limited | Real estate | 2002 |
| Burley House Estates Limited | Real estate | 1997 |
| Burley Performance Labs Ltd | Information & communication | 2025 |
| Burlington Nursing Home Limited | Health & social care | 1986 |
| Busch Group Limited | Real estate | 2017 |
| Busec Nova Ltd | Education | 2018 |
| Buzz and Fade Ltd | Other services | 2024 |
| Buzz Creative Solutions Ltd | Professional & scientific | 2016 |
| BW Carpentry Ltd | Construction | 2021 |
| BW Structure & Space Ltd | Construction | 2026 |
| C C Compactors Limited | Extraterritorial | 2009 |
| C K M Design Ltd | Manufacturing | 2025 |
| C W Bikes Limited | Wholesale & retail | 2014 |
| C W Finishings Limited | Manufacturing | 2004 |
| C&C Recruitment Solutions Ltd | Administrative & support | 2014 |
| C&L Developers Ltd | Construction | 2023 |
| C&P Thunder Garage Ltd | Wholesale & retail | 2019 |
| C&S Collectables Direct Ltd | Extraterritorial | 2004 |
| C-Scribe Ltd | Professional & scientific | 2019 |
| C.D.Abrams Limited | Administrative & support | 1952 |
| C.R. & S. Electronics Limited | Professional & scientific | 1978 |
| C08HAM Ltd | Construction | 2022 |
| Cabin Depot Ltd | Wholesale & retail | 2016 |
| Cabinetique Limited | Manufacturing | 2018 |
| Caesar Holdings Limited | Real estate | 2026 |
| Caesar Living Limited | Real estate | 2026 |
| Caketopia Limited | Wholesale & retail | 2024 |
| Caldwell & Beling Ltd | Health & social care | 2012 |
| Called OUT Ltd | Information & communication | 2023 |
| Calls 4 U Ltd | Administrative & support | 2003 |
| Callstop Limited | Administrative & support | 2013 |
| Calvert Creative Limited | Education | 2022 |
| Camarc Limited | Professional & scientific | 1986 |
| Cameron Irrigation Systems Limited | Administrative & support | 2012 |
| Cameron Pump Services LLP | | 2023 |
| Campbell Mechanical Management Ltd | Construction | 2014 |
| Canark Marine Limited | Professional & scientific | 2011 |
| Cane Civil Engineering Ltd | Construction | 2010 |
| Capitalrise Properties Ltd | Real estate | 2025 |
| Capricorn Electrical Services Ltd | Construction | 2008 |
| Captain Takeout Ltd | Hospitality | 2020 |
| CARBON1000 Ltd | Manufacturing | 2023 |
| Carelia Property Services Limited | Real estate | 2005 |
| Carex Car Sales Ltd | Wholesale & retail | 2025 |
| Caring Haven Home Service Ltd | Administrative & support | 2023 |
| Carissima Court Residents Association Limited | Real estate | 1996 |
| Caroline Alexander Consulting Limited | Other services | 2025 |
| Carpe Diem PUB Co Ltd | Hospitality | 2024 |
| Cartec Redhill Repairs Ltd | Wholesale & retail | 2023 |
| Carter Property Group Ltd | Construction | 2025 |
| Casco Finance Limited | Administrative & support | 1977 |
| Castle Close (Bognor Regis) Residents Association Limited | Households | 2021 |
| Castle Consultancy Limited | Professional & scientific | 2015 |
| Catalyst Collective Coaching Ltd | Education | 2025 |
| Caterbake Packaging Limited | Administrative & support | 2001 |
| Caterpillars Pre-School (Sussex) Limited | Health & social care | 2015 |
| Cavendish Clearance Services Limited | Professional & scientific | 2012 |
| Cavendish Health Care Ltd | Health & social care | 2008 |
| Cawley Brothers Tree Surgery Ltd | Administrative & support | 2022 |
| CB Spice Ltd | Hospitality | 2025 |
| Ce-Aire Ltd | Other services | 2025 |
| Ce-Aire Ltd | Other services | 2025 |
| Cease Fire Cafe Yapton Limited | Hospitality | 2025 |
| Cedar Court (Middleton on Sea) Limited | Real estate | 2007 |
| Cedar Nursery (West Sussex) Ltd | Administrative & support | 2006 |
| CEH Carpets Limited | Administrative & support | 2011 |
| Cell Repair Limited | Information & communication | 2016 |
| Central Cars (West Sussex) Limited | Transport & logistics | 2011 |
| Central Room Rentals Ltd | Real estate | 2022 |
| Centre for Global Solutions Ltd | Professional & scientific | 2020 |
| Cesello Limited | Information & communication | 2017 |