| Batten Civil Engineering Limited | Construction | 1993 |
| BC Enterprise Holdings Limited | Financial services | 2024 |
| Beachside Marketing Limited | Professional & scientific | 2013 |
| Beeding Chippy Limited | Hospitality | 2019 |
| Beltons Public Accountants Limited | Professional & scientific | 2004 |
| Benandnat Limited | Agriculture & fishing | 2016 |
| Benchmark Drinks Ltd | Wholesale & retail | 2018 |
| Bennet Technical Services Ltd | Professional & scientific | 1997 |
| Betaland Limited | Mining & quarrying | 2003 |
| Better Business (UK) Limited | Administrative & support | 2014 |
| Better Business Partners Ltd | Administrative & support | 2014 |
| Better Doctors Limited | Arts & recreation | 2009 |
| Between Tracks Media Productions Ltd | Information & communication | 2020 |
| BEX Bean Fitness and Nutrition Ltd | Real estate | 2017 |
| BF Property Investments Limited | Real estate | 2023 |
| Bickley Park School Limited | Education | 1962 |
| Big Plant Nursery Limited | Wholesale & retail | 2003 |
| Biga Viation Limited | Professional & scientific | 2007 |
| Bitspyder Ltd | Professional & scientific | 2026 |
| Blacklight Management Limited | Professional & scientific | 2009 |
| Blackstone Family Law LLP | | 2022 |
| Bloobear Limited | Administrative & support | 2011 |
| Blue Sky Applications Limited | Transport & logistics | 2002 |
| Bluetone Ltd | Administrative & support | 2004 |
| Bluewave Pools Limited | Construction | 2025 |
| Bocon Design Ltd | Manufacturing | 2024 |
| Bolitho Maritime Productions Limited | Arts & recreation | 1973 |
| Boltlock Ltd | Information & communication | 2025 |
| Bond Construction Holdings Limited | Financial services | 2019 |
| Bond Construction Services Limited | Construction | 2001 |
| Boxall Ward (Services) Limited | Construction | 2012 |
| Boxall Ward Limited | Construction | 2008 |
| Bravely Honestly Generously Limited | Professional & scientific | 2019 |
| Bravus Group Ltd | Professional & scientific | 2026 |
| Bridgewater Property Services Limited | Construction | 2018 |
| Bright Accounts Limited | Professional & scientific | 2015 |
| Bright Sea Media Ltd | Information & communication | 2011 |
| Broomfields Consulting Ltd | Professional & scientific | 2023 |
| Bryan Green Marketing Limited | Manufacturing | 1978 |
| Bsla Limited | Professional & scientific | 2021 |
| Buci Properties Limited | Real estate | 2018 |
| Burningsuit Limited | Information & communication | 2006 |
| Burton Property and Investments LLP | | 2018 |
| C J Thorne & Co Limited | Construction | 1939 |
| C J Thorne Holdings Limited | Financial services | 2024 |
| C.V.Howard Investments Limited | Real estate | 1962 |
| C2C Solutions UK Limited | Financial services | 2020 |
| Cadence Systems Ltd | Information & communication | 2014 |
| Cadential Ltd | Professional & scientific | 2006 |
| Cadogan Private Travel Ltd | Administrative & support | 2021 |
| Camilla Bishop Limited | Administrative & support | 2021 |
| Carnabys Lettings Limited | Real estate | 2001 |
| Carpet Hunters Ltd | Administrative & support | 2025 |
| CD Wholesale Group Ltd | Wholesale & retail | 2026 |
| Cedar Downs Limited | Real estate | 2018 |
| Celadon Summer Ltd | Arts & recreation | 2026 |
| Central Scene Properties Ltd | Real estate | 2015 |
| Cerro Climbing Limited | Wholesale & retail | 2024 |
| CG 1801 Ltd | Real estate | 2023 |
| Chanctonbury Community Kitchen CIC | Hospitality | 2026 |
| Chanctonbury Ltd | Professional & scientific | 2018 |
| Chanctonbury Wines Limited | Wholesale & retail | 2023 |
| Chanctonfold Property 1 Ltd | Real estate | 2025 |
| Charlie Lane (Snowboarding) Ltd | Construction | 2009 |
| Charlotte French Financial Planning Ltd | Financial services | 2020 |
| Chase Studios Limited | Professional & scientific | 2024 |
| Chatsworth IM Ltd | Professional & scientific | 2016 |
| Chelwood Beacon Management Company Limited | Households | 2006 |
| Cherry Court (Horsham) Management Limited | Households | 1988 |
| Chownes Foundation(The) | Health & social care | 1987 |
| Chownes Property Limited | Real estate | 2025 |
| Churchlands Courtlands Limited | Real estate | 2012 |
| Cleaning for Professionals Limited | Administrative & support | 2012 |
| Cliftonville Court RTM Company Limited | Administrative & support | 2015 |
| Climate Acceptance Limited | Information & communication | 2024 |
| Clivedale Residents Association Limited | Households | 1978 |
| Cliveden Securities Limited | Administrative & support | 1975 |
| Co-Health Limited | Health & social care | 2010 |
| Cobblestone Walk Ltd | Hospitality | 2015 |
| CODY007 Limited | Administrative & support | 2014 |
| Comity Property Management Ltd | Extraterritorial | 2021 |
| Commercial Real Estate Women UK | Other services | 2024 |
| Company Health Europe Group Ltd | Health & social care | 2010 |
| Company Health Europe Limited | Health & social care | 1990 |
| Compass Mortgages Limited | Financial services | 2003 |
| Concierge Consulting Ltd | Professional & scientific | 2022 |
| Conference Services Ltd | Administrative & support | 2018 |
| Connect to Change Limited | Other services | 2013 |
| Connectin Group Ltd | Administrative & support | 2019 |
| Connectin Media Ltd | Administrative & support | 2019 |
| Constant Escape Production Ltd | Information & communication | 2024 |
| Consumer Cards Claim Limited | Professional & scientific | 2026 |
| Contractarm Limited | Administrative & support | 2012 |
| Coordination Catering Hire Limited | Hospitality | 1998 |
| Cornwell Products Machinery Sales Limited | Administrative & support | 1997 |
| Corporate Intelligence Service Limited | Administrative & support | 1990 |
| Courtyard Investments Limited | Professional & scientific | 2025 |
| Coventry Plumbing Ltd | Construction | 2015 |
| Coverwise (Services) Limited | Financial services | 2014 |
| Coverwise Direct Limited | Administrative & support | 1999 |