| Bttb Ltd | Education | 2021 |
| Bugis Ltd | Transport & logistics | 2021 |
| Building Blocks Day Nurseries Group Ltd | Education | 2026 |
| Building Blocks Day Nurseries Ltd | Education | 2023 |
| Bujoreanu Trans Ltd | Transport & logistics | 2018 |
| Bull Properties LS Limited | Construction | 2019 |
| Bullet Towing Limited | Wholesale & retail | 2020 |
| Bulley Davey Wealth Management Limited | Administrative & support | 2011 |
| Bullinpinch Ltd | Hospitality | 2016 |
| Bunty Property Limited | Real estate | 2022 |
| Burden & Butler Estates Limited | Construction | 2023 |
| Burgess Farms Limited | Professional & scientific | 1995 |
| Burmak Holdings Limited | Other services | 2018 |
| Burman Glass Holdings Ltd | Real estate | 2025 |
| Burton Court Rental Limited | Real estate | 2025 |
| Business Outloud Ltd | Professional & scientific | 2025 |
| Busturas Ltd | Transport & logistics | 2026 |
| Busy B'S Catering Limited | Hospitality | 2010 |
| Busy B'S Outside Catering Ltd | Hospitality | 2012 |
| Busy B'S Truckstop Diner Ltd | Hospitality | 2019 |
| Butterwick Fryer Limited | Wholesale & retail | 2003 |
| Butterwick GSL Investments LLP | | 2019 |
| Buzzard Security Services Ltd | Administrative & support | 2011 |
| BV Driving Services Ltd | Transport & logistics | 2017 |
| BWR Commercial Finance Ltd | Financial services | 2020 |
| BZK Ltd | Transport & logistics | 2015 |
| C & a G Trans Ltd | Manufacturing | 2021 |
| C & EA Futter Limited | Agriculture & fishing | 2012 |
| C & L Roofline (Coventry) Ltd | Construction | 2018 |
| C & M Property Group Limited | Real estate | 2021 |
| C & S Properties (Holbeach) Limited | Real estate | 2020 |
| C and E Commercials Ltd | Wholesale & retail | 2023 |
| C C Johnson & SON Limited | Administrative & support | 2014 |
| C E R Groundworks Limited | Construction | 2013 |
| C G Builders (Doncaster) Ltd | Construction | 2022 |
| C J B Properties Limited | Real estate | 2001 |
| C L Bignell Ltd | Agriculture & fishing | 2005 |
| C L F Associates Limited | Professional & scientific | 2011 |
| C Marsh Tooling Services Ltd | Manufacturing | 2015 |
| C N I Europe Limited | Information & communication | 2001 |
| C R Benton & SON Ltd | Construction | 2017 |
| C Smith Roofing and Maintenance Ltd | Construction | 2025 |
| C Templeman Ltd | Health & social care | 2011 |
| C W Plumbing and Bathrooms Ltd | Construction | 2021 |
| C&C Bathrooms Ltd | Wholesale & retail | 2025 |
| C&E Commercials (Lincs) Ltd | Wholesale & retail | 2023 |
| C&F Property Maintenance Ltd | Construction | 2025 |
| C&P Plants Ltd | Agriculture & fishing | 2025 |
| C&R Ltd | Construction | 2025 |
| C. Carters Limited | Real estate | 2001 |
| C. Warrick & SON (Concrete) Limited | Manufacturing | 1946 |
| C.A Browne Electrical Engineers Limited | Construction | 2023 |
| C.A.D. Roofing and Building Ltd | Construction | 2022 |
| C.D. SLY Limited | Agriculture & fishing | 2019 |
| C.E Pallets Ltd | Manufacturing | 2026 |
| C.E.Richardson Limited | Agriculture & fishing | 1954 |
| C.F. Harrison Limited | Agriculture & fishing | 1962 |
| C.Y.N Renovations Ltd | Construction | 2025 |
| C4SE Protective Casings Ltd | Manufacturing | 2023 |
| CA Holmes Construction Ltd | Construction | 2018 |
| Cabinets Direct Ltd | Manufacturing | 2014 |
| Cabrielle Care Ltd | Administrative & support | 2024 |
| Caddies and Birdies Limited | Wholesale & retail | 2026 |
| Caelum Homes Limited | Real estate | 2026 |
| Caffe Aurora Limited | Hospitality | 2014 |
| Cairo Hamilton Ltd | Professional & scientific | 2019 |
| Calereux Ltd | Real estate | 2026 |
| Calereux Properties Limited | Financial services | 2026 |
| Calka Driver Services Ltd | Administrative & support | 2012 |
| Calthrops Solicitors LLP | | 2009 |
| Calvey Care Services Ltd | Administrative & support | 2018 |
| Calyon RS Ltd | Hospitality | 2025 |
| Cambridgeshire Drives and Patio's Ltd | Construction | 2025 |
| Cambridgeshire Drives Patio's and General Builder Ltd | Construction | 2025 |
| Cambridgeshire Driveways and Patios Ltd | Administrative & support | 2023 |
| Cambridgeshire Marine Sales Ltd | Manufacturing | 2014 |
| Cambridgeshire Roofing & Building Ltd | Construction | 2025 |
| Cambridgeshire Roofing Solutions Ltd | Construction | 2025 |
| Cameo Hair Care by Jayne Limited | | 1976 |
| Campbell ESQ. Ltd | Wholesale & retail | 2006 |
| Canberra Properties Limited | Real estate | 2015 |
| Candlesticks Restaurant Limited | Hospitality | 2010 |
| Candour Accounts Limited | Professional & scientific | 2015 |
| Cannon Williamson Limited | Professional & scientific | 1998 |
| Canopy Interim Ltd. | Professional & scientific | 2018 |
| Capontoft Associates Limited | Agriculture & fishing | 2015 |
| Caps Group Limited | Professional & scientific | 2022 |
| Car Key Solutions Ltd. | Wholesale & retail | 2018 |
| Carcristrans Limited | Transport & logistics | 2014 |
| Cardale Property Ltd | Real estate | 2018 |
| Care Fortress Solutions Limited | Public administration | 2025 |
| Care Lodge Ltd | Health & social care | 2025 |
| Care Nest Group Limited | Health & social care | 2024 |
| Care Travel Ltd | Health & social care | 2024 |
| Carier Bulk Materials Handling Limited | Extraterritorial | 2004 |
| Carl Grooby Electrical Services Ltd | Manufacturing | 2023 |
| Carlton Holdings (Pinchbeck ) Ltd | Financial services | 2022 |
| Carlton Joinery Limited | Construction | 2005 |
| Carmans Roofing & Building Ltd | Construction | 2024 |
| Carmen-Maria Ltd | Transport & logistics | 2015 |