| Bookajet Aircraft Management Limited | Transport & logistics | 2003 |
| Bookajet Aviation Services Limited | Transport & logistics | 1997 |
| Bookajet International Limited | Professional & scientific | 2003 |
| Bookajet Limited | Transport & logistics | 1991 |
| Bookajet.Com Limited | Professional & scientific | 2000 |
| Border Control (Internet) Limited | Information & communication | 2003 |
| Borders Investments Limited | Real estate | 2002 |
| Borlakha Spice Limited | Hospitality | 2017 |
| Boundworth Limited | Construction | 1973 |
| Boutique TV Limited | Information & communication | 2007 |
| Boxx Direct Ltd | Wholesale & retail | 2019 |
| Bradley Electrical (2004) Limited | Construction | 2003 |
| Braemar Capital Limited | Professional & scientific | 2003 |
| Brain Injury Rehabilitation Trust | Health & social care | 1993 |
| Brancross Investments Limited | Real estate | 2001 |
| Breakthrough Entertainment LLP | | 2016 |
| Brian GOW Roofing Supplies Limited | Wholesale & retail | 2004 |
| Bricktec Limited | Professional & scientific | 1990 |
| Bridge Hall Homes Limited | Real estate | 2021 |
| Bridgetide Limited | Extraterritorial | 1984 |
| Brighton & Hove Kitchens Ltd | Construction | 2005 |
| Brighton & Storrington Investments Limited | Real estate | 1965 |
| Brinkgrace Limited | Real estate | 1990 |
| Britannia Milling Services Limited | Professional & scientific | 1981 |
| Britchiro Clinics Limited | Health & social care | 2000 |
| Broadside Boatyard Limited | Manufacturing | 2005 |
| Brock Associates Limited | Professional & scientific | 1997 |
| Bromley Clackett Limited | Professional & scientific | 2007 |
| Brook & Churches Bros.Limited | Wholesale & retail | 1921 |
| Brook & Churches Limited | Financial services | 1985 |
| Brook Street Garage Limited | Wholesale & retail | 2007 |
| Broomfield Books Limited | Wholesale & retail | 2007 |
| Bryant Fixings Limited | Wholesale & retail | 1990 |
| BSW Building Services Ltd | Construction | 1982 |
| Buddys Catering Ltd | Hospitality | 2021 |
| Building and Civil Engineering Benefits Scheme Trustee Limited | Financial services | 1975 |
| Burgan Consulting Limited | Information & communication | 2005 |
| Burgess and Randall Limited | Wholesale & retail | 1930 |
| Burnetts Refrigeration & Air Conditioning Limited | Professional & scientific | 2007 |
| Burntwood Lodge Limited | Health & social care | 2024 |
| Burst Inc. Limited | Wholesale & retail | 1998 |
| Business Modelling Solutions Limited | Professional & scientific | 2005 |
| Business Transition Technologies Limited | Professional & scientific | 1993 |
| BVG Ltd | Extraterritorial | 2023 |
| BWS Fencing Ltd | Manufacturing | 2006 |
| Bytes Limited | Professional & scientific | 1989 |
| C and a Hawes Limited | Real estate | 2002 |
| C J Roberts Plumbing & Heating Limited | Construction | 2002 |
| C Jenkin & SON Limited | Real estate | 2006 |
| C M P S 2000 Limited | Transport & logistics | 1999 |
| Caburn Engineering Limited | Manufacturing | 1997 |
| CAE (UK) PLC | Professional & scientific | 1967 |
| CAE Holdings Limited | Professional & scientific | 1994 |
| Cameo Traditional Furniture Limited | Professional & scientific | 1973 |
| Camera Grip Limited | Administrative & support | 2008 |
| Cameras Full Tilt Limited | Administrative & support | 2007 |
| Canaan Holdings Ltd | Education | 2016 |
| Cannadines Bathrooms Limited | Wholesale & retail | 1991 |
| Capital Aerospace Limited | Professional & scientific | 2001 |
| Capital Aviation Limited | Financial services | 2001 |
| Car Trim Systems Limited | Wholesale & retail | 2003 |
| Care for Veterans | Health & social care | 1998 |
| Care for Veterans Services Limited | Administrative & support | 2006 |
| Carfax Properties Limited | Real estate | 2012 |
| Carte Blanche Limited | Professional & scientific | 1990 |
| Castle Cleaning Services (Sussex) Limited | Administrative & support | 2005 |
| Castle Property Consultants LLP | | 2004 |
| Cater & Co. the Social Kinetic Limited | Administrative & support | 2011 |
| Catherine Kelly PR Limited | Information & communication | 2015 |
| Catopia Limited | Agriculture & fishing | 2006 |
| Cavalcade Capital Assets Ltd | Professional & scientific | 2003 |
| CDA Translations UK Limited | Professional & scientific | 2019 |
| Cedar Garage Limited | Wholesale & retail | 2004 |
| Cedarwood Trading Limited | Other services | 2000 |
| Cementaid (UK) Limited | Manufacturing | 1992 |
| CEN Limited | Health & social care | 2019 |
| Census Searches Limited | Other services | 2001 |
| Centre of English Studies Limited | Education | 1998 |
| Ceramic Tiling Associates Limited | Construction | 2003 |
| Chancetake Property Management Limited | Households | 1993 |
| Channel Consultancy Ltd | Professional & scientific | 2005 |
| Chapel Construction Ltd | Construction | 1993 |
| Charles Hobbs Technology Consulting Limited | Information & communication | 2004 |
| Charlies Angels UK Limited | Extraterritorial | 2006 |
| Charlton Realisations Limited | | 1959 |
| Chatsworth Forge & Engineering Limited | Professional & scientific | 1973 |
| Cheers (Southern) Limited | | 1985 |
| Chichester & Sussex Properties Limited | Real estate | 2003 |
| Chichester Cathedral Estates Limited | Real estate | 2025 |
| Chichester Cattery Limited | Other services | 2002 |
| Chichester Festival Theatre | Arts & recreation | 2001 |
| Chichester Harbour Water Tours Ltd | Transport & logistics | 2003 |
| Chifoo Limited | Hospitality | 2024 |
| Chiviott (Machine Tools) Limited | Manufacturing | 1976 |
| Choice Staffing Services Limited | Education | 2005 |
| Chris IDE Construction Limited | Construction | 2003 |
| Chris Nutting Oncology Limited | Health & social care | 2010 |
| Christopher Young Limited | Professional & scientific | 2002 |
| City Sales and Service Centres Limited | Administrative & support | 2006 |
| Clairview Books Limited | Information & communication | 2004 |