| Byron Highton Limited | Education | 2024 |
| Bytesize Learning Ltd. | Information & communication | 2000 |
| Byvitality Limited | Hospitality | 2024 |
| C & C Joinery (NW) Limited | Construction | 2001 |
| C & C Logistics Ltd | Administrative & support | 2009 |
| C & C Proctor Holdings Ltd | Professional & scientific | 2016 |
| C & C Proctor Property Investments Limited | Extraterritorial | 2021 |
| C & C Supplies Holdings Ltd | Financial services | 2024 |
| C & D Developments Limited | Administrative & support | 2002 |
| C & D Trading Limited | Real estate | 2006 |
| C & G Building Developments Ltd | Construction | 2019 |
| C & HB Limited | Hospitality | 2023 |
| C & J Wildlife Management Limited | Agriculture & fishing | 2013 |
| C & M Electrical (North West) Limited | Construction | 2017 |
| C & M Medical Limited | Professional & scientific | 2022 |
| C & P Plant and Machinery Ltd | Wholesale & retail | 2023 |
| C & S Pharmacy Limited | Wholesale & retail | 2009 |
| C & W Berry Trading Limited | Real estate | 2000 |
| C a Fencing Ltd | Administrative & support | 2019 |
| C Baxendale Metal Recycling Ltd | Water & waste | 2012 |
| C C F D Limited | Professional & scientific | 1933 |
| C D H Power Services Ltd | Public administration | 2025 |
| C D Sherrington Holdings Ltd | Real estate | 2026 |
| C G Electrical Limited | Manufacturing | 2018 |
| C G H W Limited | Financial services | 2009 |
| C Giovanni Limited | Construction | 2025 |
| C Higham Limited | Administrative & support | 2023 |
| C Hogarth Limited | Administrative & support | 2007 |
| C J Locks Ltd | Construction | 2026 |
| C J Rimmer Transport Ltd | Transport & logistics | 2017 |
| C L Danson (Building Contractors) Limited | Construction | 2003 |
| C L Danson Holdings Limited | Real estate | 2022 |
| C M B Total Image Ltd | Wholesale & retail | 2000 |
| C M Newtech Limited | Information & communication | 2016 |
| C N Metal Works Limited | Manufacturing | 2011 |
| C Peacock Holdings Limited | Real estate | 2018 |
| C Richardson Capital Limited | Financial services | 2022 |
| C S FOY Limited | Health & social care | 2021 |
| C S Hornby Limited | Construction | 2014 |
| C S Motor Sales Ltd | Wholesale & retail | 2026 |
| C S Storage Limited | Wholesale & retail | 2004 |
| C Stewartson Contracts Limited | Professional & scientific | 2024 |
| C T Flooring and Coatings Ltd | Construction | 2010 |
| C Wrights Repairs and Service Ltd | Professional & scientific | 2025 |
| C&C Anaesthesia Ltd | Health & social care | 2019 |
| C&C Education Services Limited | Education | 2025 |
| C&D Eccles Property Ltd | Construction | 2020 |
| C&H Dryliners Ltd | Construction | 2022 |
| C&H Whittle Joinery Ltd | Manufacturing | 2022 |
| C&J Carefoot Management Company Limited | Real estate | 2019 |
| C&S Property Developments (NW) Limited | Real estate | 2022 |
| C&V Food Limited | Hospitality | 2026 |
| C-Futures.Com Limited | Professional & scientific | 2020 |
| C-Hydration Ltd | Health & social care | 2025 |
| C. Mercer Engineering Services Limited | Construction | 2007 |
| C.B. Leach Limited | | 1979 |
| C.H.P. Decorators Ltd | Construction | 2015 |
| C.H.R. Equipment Limited | Construction | 1997 |
| C.I. Motors Limited | Wholesale & retail | 2001 |
| C.I.S. Accountancy Services Limited | Professional & scientific | 2002 |
| C.M.G. Guitars Limited | Education | 2003 |
| C.P.S. (Preston) Limited | Education | 1954 |
| C.W.B. Representation Limited | Administrative & support | 2003 |
| C.W.B.G Limited | Professional & scientific | 2012 |
| C2H6O Ltd | Hospitality | 2020 |
| C2SAPIENT Limited | Professional & scientific | 2018 |
| Caars Estates Limited | Agriculture & fishing | 2010 |
| Caars Property Limited | Real estate | 2018 |
| CAB Estate Management Limited | Real estate | 2019 |
| Cable Court Preston (Management) Limited | Real estate | 2001 |
| Cable Installation Services (NW) Limited | Construction | 2013 |
| Cable Installation Services Limited | Extraterritorial | 2024 |
| Caboodle IT Ltd | Manufacturing | 2025 |
| Caboodll Ltd | Professional & scientific | 2022 |
| CAC Trading Ltd | Wholesale & retail | 2026 |
| Cadco Creative Limited | Wholesale & retail | 2026 |
| Caddy Trailers Limited | Extraterritorial | 2018 |
| Cadea Consultancy Services Ltd | Professional & scientific | 2025 |
| Cadea Leisure Ltd | Hospitality | 2024 |
| Cademia Limited | Information & communication | 2025 |
| Caden Consultants Limited | Professional & scientific | 1990 |
| Cads Contractors Ltd | Construction | 2023 |
| Cafaine Ltd | Hospitality | 2021 |
| Cafao Ltd | Professional & scientific | 2013 |
| Cafe Iris Ltd | Hospitality | 2022 |
| Cafe Maariyah Ltd | Hospitality | 2026 |
| Cafe Shahi Ltd | Hospitality | 2026 |
| Cafune Coffeeshops Ltd | Hospitality | 2017 |
| CAG Data Solutions Ltd | Information & communication | 2025 |
| CAH Properties Limited | Real estate | 2019 |
| Cahill Compliance & Management Services Limited | Professional & scientific | 2000 |
| Cahill Leisure Limited | Arts & recreation | 2009 |
| Caillo Construction Ltd | Construction | 2025 |
| Cairn NA Moyne Contractor Limited | Administrative & support | 2007 |
| Cairns and Farrington Property Developers Limited | Construction | 2006 |
| Cairns Pharma Limited | Extraterritorial | 2003 |
| Cairns Property Lettings Ltd | Real estate | 2026 |
| Cakes N’ Trays Ltd | Hospitality | 2025 |
| CAL VAL Ltd | Professional & scientific | 2023 |
| Calder Avenue Management Limited | Households | 1990 |