| Clinton Informatics Limited | Information & communication | 2014 |
| CLJ Investments Ltd | Real estate | 2019 |
| Clock OUT Competitions Ltd | Other services | 2025 |
| Cloisters Properties (Blackpool) Ltd | Real estate | 2020 |
| Clothingam Ltd | Manufacturing | 2021 |
| Cloud Accountancy (Blackpool) Ltd | Professional & scientific | 2015 |
| Cloud App Factory Ltd | Information & communication | 2019 |
| Cloud App Platform Ltd | Information & communication | 2019 |
| Cloud Loot Ltd | Wholesale & retail | 2026 |
| CLOUD9 Computer Services Ltd | Information & communication | 2016 |
| Clover Foods Limited | Wholesale & retail | 2004 |
| Clover Leaf MOT Ltd | Wholesale & retail | 2018 |
| Club 171 Limited | Hospitality | 2014 |
| CLV FOX Logistics Ltd | Transport & logistics | 2023 |
| CM (NW) Limited | Real estate | 2016 |
| CM Change Solutions Limited | Professional & scientific | 2014 |
| CMB United CIC | Education | 2025 |
| CMC Analytica Ltd | Professional & scientific | 2024 |
| CMC Brands Ltd | Wholesale & retail | 2025 |
| CMF Holdings Ltd | Administrative & support | 2019 |
| CMF Trading Limited | Administrative & support | 2006 |
| CMS Golf Coach Ltd | Arts & recreation | 2023 |
| CMS Media Limited | Information & communication | 2019 |
| CMT 89 Investment Ltd | Real estate | 2022 |
| CMW Consultancy Ltd | Information & communication | 2014 |
| Cmworldwide Limited | Hospitality | 2025 |
| CN Active Limited | Education | 2022 |
| CNM Joinery Limited | Construction | 2013 |
| Co-Op Marketplace Limited | Wholesale & retail | 2025 |
| Co.Sign Partners in Communication Ltd. | Health & social care | 1996 |
| Coach Europe Limited | Administrative & support | 2019 |
| Coach Joseph PT Ltd | Health & social care | 2023 |
| Coana Limited | Extraterritorial | 2026 |
| Coast Restaurants Limited | Hospitality | 2025 |
| Coastal Bay Barbers & Beauty Salon Ltd | Wholesale & retail | 2020 |
| Coastal Breaks Ltd | Hospitality | 2020 |
| Coastal Care Solutions Limited | Health & social care | 2020 |
| Coastal Clean & Bright Cleaning Services Ltd. | Administrative & support | 2025 |
| Coastal Cleaners Ltd | Administrative & support | 2025 |
| Coastal Commercial NW Ltd | Wholesale & retail | 2026 |
| Coastal Construction and Development NW Ltd | Construction | 2025 |
| Coastal Convenience Limited | Wholesale & retail | 2024 |
| Coastal Garage Ltd | Wholesale & retail | 2015 |
| Coastal Golf UK Ltd | Professional & scientific | 2020 |
| Coastal Health Care Limited | Extraterritorial | 2008 |
| Coastal Industries Ltd | Construction | 2024 |
| Coastal Invest Ltd | Real estate | 2025 |
| Coastal Key Housing Ltd | Health & social care | 2018 |
| Coastal Path Care Ltd | Health & social care | 2022 |
| Coastal Properties North West Ltd | Real estate | 2019 |
| Coastal Radio Limited | Information & communication | 2022 |
| Coastal Real Estate NW Ltd | Real estate | 2025 |
| Coastal Stays North Ltd | Hospitality | 2026 |
| Coaster Chippy Ltd | Hospitality | 2025 |
| Coastline Properties (NW) Ltd | Real estate | 2009 |
| Coba Construct Ltd | Construction | 2019 |
| Cobains Solicitors Limited | Professional & scientific | 2008 |
| Cobalt Services Limited | Construction | 2025 |
| Cobe Apparel Ltd | Wholesale & retail | 2020 |
| Cobra Signs Printing Ltd | Manufacturing | 2019 |
| Cock and Dolphin Yard Management Company Limited | Households | 2011 |
| Coco 1 Limited | Construction | 2007 |
| Coco Apparel Limited | Wholesale & retail | 2017 |
| Coco Nails 8 Ltd | Other services | 2026 |
| Coco Nails BB18 Ltd | Other services | 2026 |
| Cocoa Loco Ltd | Manufacturing | 2007 |
| Coconut Competitions Ltd | Arts & recreation | 2022 |
| Coconut Cove Blackpool Limited | Hospitality | 2026 |
| Codecraft Consulting Limited | Information & communication | 2012 |
| Coded Consultants Ltd | Information & communication | 2019 |
| Codefrog Ltd | Information & communication | 2016 |
| Coderobin Ltd | Wholesale & retail | 2014 |
| Codfather Donut HUT Ltd | Wholesale & retail | 2025 |
| Coffee Americano Ltd | Hospitality | 2023 |
| Coffee Brook Ltd | Hospitality | 2014 |
| Coffee Chat Hospitality Ltd | Hospitality | 2026 |
| Coffee Shop Solutions Limited | Wholesale & retail | 2025 |
| Coffee Sisters Ltd | Hospitality | 2019 |
| Coggan Marine Limited | Information & communication | 2020 |
| Cognex Limited | Professional & scientific | 2010 |
| Cognis Solutions Ltd | Information & communication | 2025 |
| Cognitech Services and Solutions Limited | Professional & scientific | 2018 |
| Cohese Limited | Information & communication | 2015 |
| Coker Electrical Ltd. | Construction | 2015 |
| Cole Morriss Ltd | Construction | 2025 |
| Cole the Jeweller Corporate Limited | Wholesale & retail | 1986 |
| Cole the Jeweller LLP | | 2008 |
| Colin James Davies Ltd | Extraterritorial | 2024 |
| Colin Lawson Storage and Distribution Limited | Transport & logistics | 2007 |
| Colin Stead Ltd | Transport & logistics | 2013 |
| Collaborise Property Group Limited | Construction | 2023 |
| Collective Consultancy & Associates UK Limited | Professional & scientific | 2026 |
| Collective Entertainment (UK) Ltd | Arts & recreation | 2026 |
| College Court (ST Annes) Limited | Households | 2002 |
| Collins Media Ltd | Professional & scientific | 2026 |
| Colossal Capital Investments Ltd | Real estate | 2019 |
| Colossal Training Ltd | Administrative & support | 2011 |
| Colourful Foundations Limited | Administrative & support | 2023 |
| Com-Tech Contracting Ltd | Information & communication | 2009 |
| Come Cook With US CIC | Education | 2025 |