| C Scotland Construction Limited | Construction | 2003 |
| C Thomas Social Ltd | Arts & recreation | 2021 |
| C W Decorating Limited | Construction | 2016 |
| C&A Assets Ltd | Real estate | 2017 |
| C&B Residential Ltd | Construction | 2022 |
| C&C Build Ltd | Construction | 2016 |
| C&C Flooring Solutions Limited | Construction | 2021 |
| C&D Dog Services Ltd | Agriculture & fishing | 2020 |
| C&D Property and Maintenance Ltd | Real estate | 2026 |
| C&D Support Limited | Professional & scientific | 2019 |
| C&G Consult Ltd | Construction | 2026 |
| C&H Homes Ltd | Real estate | 2022 |
| C&J Design & Construction Ltd | Other services | 2024 |
| C&J Waste Removals Ltd | Water & waste | 2025 |
| C&K FE Consulting Ltd | Professional & scientific | 2023 |
| C&M New Start Ltd | Administrative & support | 2023 |
| C-Creations Ltd | Information & communication | 2013 |
| C-Jess Limited | Real estate | 2023 |
| C-Matik Ltd | Manufacturing | 2025 |
| C. B. Electrical Engineers Limited | Manufacturing | 2000 |
| C. E. Cross Ltd | Health & social care | 2021 |
| C. R. Agencies Limited | Wholesale & retail | 2002 |
| C. Tames Consulting Ltd | Arts & recreation | 2026 |
| C.A Building and Roofing Ltd | Construction | 2025 |
| C.A Rotaru Limited | Wholesale & retail | 2021 |
| C.B. Building & Joinery Limited | Construction | 2010 |
| C.B.I. Freight Limited | | 1975 |
| C.Blackshaw Brickwork Limited | Construction | 2023 |
| C.D. Medical (Bolton) Limited | Professional & scientific | 2003 |
| C.D. Medical Limited | Wholesale & retail | 2015 |
| C.D.S. Recovery Services Limited | Transport & logistics | 2022 |
| C.J.S (NW) Ltd | Construction | 2012 |
| C.J.S Manufacturing Ltd | Manufacturing | 2021 |
| C.J.W. Property Investments Ltd | Real estate | 2000 |
| C.M. Darby Associates Limited | Wholesale & retail | 1977 |
| C.M. Supply Ltd | Professional & scientific | 2002 |
| C.M.M. (Fabrications) Ltd | Construction | 2007 |
| C.P. Decorators Ltd | Construction | 2006 |
| C.P.A. Bespoke Joinery Limited | Construction | 2002 |
| C.P.S. (Plastering) Limited | Construction | 2011 |
| C.W. Construction (North West) Limited | Construction | 2001 |
| C1 Driver Training North West Ltd | Education | 2020 |
| C17 Properties Limited | Real estate | 2023 |
| C2 Clothing Ltd | Wholesale & retail | 2025 |
| C2 Liverpool Ltd | Hospitality | 2026 |
| C2 VTG Group Ltd | Wholesale & retail | 2019 |
| C2COFFEE Ltd | Wholesale & retail | 2026 |
| C2N Systems Ltd | Information & communication | 2025 |
| C2SKY Cargo Limited | Transport & logistics | 2018 |
| C3A Development Ltd | Construction | 2025 |
| C4 Rentals Limited | Real estate | 2014 |
| C6 Building Solutions Ltd | Construction | 2024 |
| C7 Group Limited | Transport & logistics | 2018 |
| CA (NW Franchise) Limited | Wholesale & retail | 2014 |
| CAA Assets Ltd | Financial services | 2026 |
| Caad X Limited | Administrative & support | 2016 |
| CAB Accounts (NW) Ltd | Professional & scientific | 2018 |
| Cabassist UK Ltd | Transport & logistics | 2026 |
| Cable & Climate Limited | Construction | 2019 |
| Cableworld Limited | Manufacturing | 2000 |
| Cabstart Ltd | Information & communication | 2012 |
| Cabswift Ltd | Administrative & support | 2026 |
| CAD Engine Ltd | Administrative & support | 2020 |
| CAD Properties Limited | Real estate | 2018 |
| Cadar & Holmes Ltd | Hospitality | 2018 |
| Caddyrack Limited | Wholesale & retail | 2015 |
| Cadellin Consulting Limited | Professional & scientific | 2020 |
| Cadence Architecture Limited | Professional & scientific | 2024 |
| Cadishead Property LLP | | 2007 |
| Cadnet Solutions Limited | Information & communication | 1998 |
| Caea Ltd | Wholesale & retail | 2025 |
| Caesar (Bolton) Limited | Wholesale & retail | 2021 |
| CAF Ventures Ltd | Financial services | 2025 |
| Cafe DE Paris (Nantwich) Ltd | Hospitality | 2020 |
| Cafe Interchange Rochdale Limited | Hospitality | 2014 |
| Cafe Italia Ltd | Hospitality | 2017 |
| Cafe Services Ltd | Professional & scientific | 2023 |
| Cafe Twelve Bolton Limited | Hospitality | 2026 |
| Cafeole Ltd | Hospitality | 2024 |
| Cafeteria Cortado Ltd | Hospitality | 2024 |
| Cain and Cochran Solicitors Limited | Professional & scientific | 2011 |
| Cain Properties Limited | Real estate | 2020 |
| Caink Consulting Limited | Information & communication | 2024 |
| Caitlin Muirhead Limited | Other services | 2023 |
| Cake Inn Bolton Ltd | Wholesale & retail | 2023 |
| Cakeologyco Ltd | Wholesale & retail | 2021 |
| Cakeout Ltd | Hospitality | 2025 |
| Calabria-Holden Ltd | Real estate | 2020 |
| Calax Ltd | Information & communication | 2011 |
| Calbion Investments Ltd | Financial services | 2015 |
| Calbonabi Electrical Ltd | Professional & scientific | 2024 |
| Calcobe Limited | Financial services | 2021 |
| Calcom Computing Limited | Professional & scientific | 1997 |
| Calcuvis Ltd | Professional & scientific | 2017 |
| Caldryx Group Limited | Professional & scientific | 2026 |
| Caledonian Quilting Co. Limited | Manufacturing | 1970 |
| Calendering Solutions Limited | Administrative & support | 2018 |
| Cali Autos Ltd | Wholesale & retail | 2022 |
| Caliber Properties Ltd | Real estate | 2025 |
| Calibre Claims Services Limited | Other services | 2010 |