| CJF Mortgage Services Limited | Financial services | 2025 |
| CJL Solutions Ltd | Administrative & support | 2023 |
| CJR Training and Developments Ltd | Real estate | 2024 |
| CKW Drylining Ltd | Construction | 2024 |
| Clade Inc Ltd. | Wholesale & retail | 2025 |
| Claire Travel Team Ltd | Administrative & support | 2026 |
| Clarity Legal Ltd | Administrative & support | 2011 |
| Clarkeys Ltd | Hospitality | 2025 |
| Claxtons Culinary Cuisine Ltd | Hospitality | 2025 |
| Clayton Contract Furnishings Limited | Extraterritorial | 2011 |
| Clayton News & Mini Market Ltd | Wholesale & retail | 2020 |
| Clayton News Group Ltd | Wholesale & retail | 2024 |
| Clayton Park Garage Ltd | Wholesale & retail | 2025 |
| Clayton Projects Limited | Health & social care | 2010 |
| Clayton-Le-Moors ALL Saints' Church of England Primary School | Education | 2011 |
| Clayton-Le-Moors Freemasons Hall Limited | Real estate | 1968 |
| Claytoncarwash Ltd | Wholesale & retail | 2025 |
| Clearage Ltd | Information & communication | 2025 |
| Clearview Cattery (Hapton) Limited | Arts & recreation | 2020 |
| Clearview Deep Cleaning Ltd | Administrative & support | 2023 |
| Cleft Group Ltd | Real estate | 2025 |
| Clitheroe Canoe Club Limited | Arts & recreation | 2025 |
| Clives Gardening Services T/A Ribble Valley Gardening Services Ltd | Administrative & support | 2021 |
| CLM Plumbing & Heating Ltd | Construction | 2020 |
| Closer Care Ltd | Health & social care | 2023 |
| Cloud Chemist Limited | Health & social care | 2011 |
| CLOUD39 Ltd | Wholesale & retail | 2018 |
| Club Fruit Services Limited | Administrative & support | 1990 |
| CM REC2REC Limited | Professional & scientific | 2025 |
| Cmac BB Co Ltd | Information & communication | 2000 |
| Cmac Group Limited | Information & communication | 2014 |
| Cmac Group UK Limited | Transport & logistics | 2007 |
| Cmac International Ltd | Transport & logistics | 2019 |
| Cmac Investments Ltd | Professional & scientific | 2022 |
| Cmac Partnership Limited | Administrative & support | 2018 |
| Cmac Transport Co Limited | Transport & logistics | 2022 |
| CMJ Barfitters Limited | Construction | 2021 |
| CMW Building & Landscaping Ltd | Administrative & support | 2025 |
| CN Site Services Ltd | Transport & logistics | 2024 |
| CNC Lubricant Solutions Ltd | Wholesale & retail | 2024 |
| Coach and BUS Limited | Transport & logistics | 2011 |
| Coach Hire Comparison Limited | Information & communication | 2014 |
| Coach Hire Comparison Transport Limited | Information & communication | 2023 |
| COB Exchange Ltd | Wholesale & retail | 2026 |
| Cocoaway Limited | Wholesale & retail | 2025 |
| Codenismo Ltd | Information & communication | 2023 |
| Cognatus Holdings Ltd | Real estate | 2025 |
| Cognisant Investment Management Ltd | Financial services | 2019 |
| Coin OP Washeteria Ltd | Other services | 2017 |
| Coldgate Leisure Limited | Hospitality | 2026 |
| Coldroom Clearance & Recycle Ltd | Administrative & support | 2024 |
| Colette Haworth Limited | Hospitality | 2020 |
| Collier Education Ltd | Education | 2023 |
| Colourful Memories C.I.C. | Health & social care | 2023 |
| Columbus Mallory Best Limited | Professional & scientific | 2014 |
| Comet Ltd | Wholesale & retail | 2022 |
| Commercial Cars (Europe) Limited | Manufacturing | 2014 |
| Commic International Ltd | Manufacturing | 2010 |
| Community Advice Support C.I.C. | Public administration | 2025 |
| Community Solutions North West Ltd | Health & social care | 2011 |
| Company 1 2024 Limited | Professional & scientific | 2024 |
| Conceal Clothing Limited | Wholesale & retail | 2021 |
| Connections Mice and Consultancy Limited | Administrative & support | 2016 |
| Consistency and Discipline Ltd | Wholesale & retail | 2023 |
| Construction Machinery UK Limited | Wholesale & retail | 2019 |
| Contaminated Land Services Ltd | Professional & scientific | 2023 |
| Contel Ltd | Wholesale & retail | 2017 |
| Contis Liquor Store Ltd | Wholesale & retail | 2021 |
| Conveyor & Elevator Group Ltd | Financial services | 2024 |
| Conveyor and Elevator Holdings Ltd | Financial services | 2015 |
| Coolant Heat Facilities Ltd | Energy | 2018 |
| Cooper's Coastal Cottages Limited | Hospitality | 2020 |
| Copperstream Limited | Administrative & support | 2014 |
| Corelink Commercial Group Limited | Construction | 2026 |
| Corn Mill Yard Management Company Ltd | Households | 2016 |
| Corner Emporium PVT Ltd | Wholesale & retail | 2024 |
| Corner Express Ltd | Wholesale & retail | 2025 |
| Corner Shop PVT Ltd | Wholesale & retail | 2024 |
| Cornerstones (UK) Ltd | Health & social care | 2003 |
| Corporate Cars Hyndburn Ltd | Transport & logistics | 2022 |
| Costuuk Silk Limited | Wholesale & retail | 2025 |
| Countrywide Catering Distributors Limited | Hospitality | 1985 |
| Courous Ltd | Professional & scientific | 2014 |
| Cover My Bubble Ltd | Financial services | 2018 |
| Cover My Marketing Limited | Information & communication | 2017 |
| CPS Health & Beauty Limited | Other services | 2017 |
| CR Safety & Consumable Supplies Ltd | Wholesale & retail | 2012 |
| Crafty Beany Ltd | Manufacturing | 2008 |
| Craig Specialist Services Ltd. | Manufacturing | 1998 |
| Craig Stainless Ltd | Manufacturing | 2018 |
| Craiglands PUB Company Limited | Real estate | 2013 |
| Craigs Bay Horse Limited | Hospitality | 2017 |
| Cranberry Meadows Management Company (Darwen) Limited | Households | 2019 |
| Craving Munch Ltd | Hospitality | 2025 |
| Crazy Clearance ALL Sorts Ltd | Wholesale & retail | 2025 |
| Creation Music Ltd | Information & communication | 2006 |
| Creative Events and Consultations Ltd | Hospitality | 2025 |
| Creative Kitchens the Design House Ltd | Wholesale & retail | 2025 |
| Creative Photography Ltd | Information & communication | 2025 |
| Crepee Vault Limited | Manufacturing | 2025 |