| CJE Properties Limited | Real estate | 2020 |
| Cjhtrading Limited | Wholesale & retail | 2021 |
| CJM Consultants NW Ltd | Professional & scientific | 2026 |
| CJM Social Work Limited | Health & social care | 2015 |
| CJS Restaurants Ltd | Hospitality | 2025 |
| CJT Property Management Limited | Real estate | 2016 |
| CJW Gynaecology Ltd | Health & social care | 2024 |
| CKK Trading Ltd | Hospitality | 2023 |
| Ckos Solutions Limited | Professional & scientific | 2010 |
| Claim Boost Media Ltd | Professional & scientific | 2025 |
| CLAIM4YOU Ltd | Administrative & support | 2009 |
| Claire Doherty Marketing Ltd | Professional & scientific | 2017 |
| Claire House | Health & social care | 1991 |
| Claire House Shops Limited | Wholesale & retail | 1991 |
| Claire Penn Limited | Professional & scientific | 2015 |
| Claire's Chique Nails & Beauty Limited | Other services | 2022 |
| Clardon Limited | Manufacturing | 1993 |
| Clare Elizabeth Hairdressing Ltd | Other services | 2021 |
| Claremont Farm Limited | Agriculture & fishing | 2010 |
| Clarity Chemicals Limited | Professional & scientific | 1999 |
| Clarity. Support Services Ltd | Professional & scientific | 2025 |
| Clark Planning Services Limited | Professional & scientific | 2025 |
| Clarke Accounting Ltd | Professional & scientific | 2007 |
| Clarke Safety Culture Ltd | Professional & scientific | 2026 |
| Clarke's Construction and Roofing Limited | Construction | 2003 |
| Class Training (NW) Ltd | Education | 2023 |
| Class Training Ltd | Education | 2018 |
| Classic Blinds Wirral Limited | Construction | 2017 |
| Classic Construction North West Limited | Construction | 2014 |
| Classical Garden Design Limited | Professional & scientific | 2022 |
| Classrooms in the Clouds | Construction | 2016 |
| Clatterbridge Propcare Services Limited | Professional & scientific | 2016 |
| Claus Care Limited | Health & social care | 2017 |
| Claybank Estates Ltd | Construction | 2017 |
| Clean Infinity Ltd | Administrative & support | 2023 |
| Cleancut Wood Limited | Wholesale & retail | 2014 |
| Clear Consulting NW Limited | Administrative & support | 2024 |
| Clear Flight Training Hub Ltd | Education | 2026 |
| Clear Path Living Limited | Health & social care | 2025 |
| Clear Tax Accountants Ltd | Professional & scientific | 2026 |
| Clear-Education Limited | Administrative & support | 2011 |
| Clear-Rec Ltd | Administrative & support | 2026 |
| Clearing Skies Limited | Education | 2003 |
| Clearlabs Performance Ltd | Wholesale & retail | 2025 |
| Clearlight Labs Limited | Professional & scientific | 2025 |
| Clearpharm Nutrition Ltd | Wholesale & retail | 2019 |
| Clearsky Counselling Ltd | Health & social care | 2016 |
| Clearwater Management Limited | Extraterritorial | 2004 |
| Cleator's Surveyors Ltd | Professional & scientific | 2023 |
| Clements Construction Wirral Limited | Construction | 2015 |
| Clercs Trading Cards & Collectables Ltd | Wholesale & retail | 2020 |
| Clevco Catering Ltd | Hospitality | 2024 |
| Cleveley Estates Limited | Real estate | 2021 |
| Clever Foods Ltd | Wholesale & retail | 2024 |
| Clickboom Ltd | Information & communication | 2025 |
| Clicknsave Ltd | Wholesale & retail | 2012 |
| Clickquotes Network Ltd | Professional & scientific | 2026 |
| Clifton Park Property | Real estate | 1950 |
| Clinical Buccal Therapy Ltd | Health & social care | 2025 |
| Clinlexis Ltd | Information & communication | 2026 |
| Clive Barrington Caddick Financial Services Ltd. | Financial services | 2005 |
| CLM Chester LLP | | 2015 |
| CLM Group Systems Limited | Manufacturing | 1999 |
| Clock Workshop (West Kirby) Ltd | Other services | 2005 |
| Cloudified Consultancy Services Ltd | Information & communication | 2019 |
| Clovelly Consulting Ltd | Information & communication | 2023 |
| Clovelly Property Management Limited | Real estate | 2010 |
| Clover Property Investments Ltd | Real estate | 2025 |
| Cloverly London Ltd | Wholesale & retail | 2020 |
| CLS Social Care Limited | Health & social care | 2021 |
| Clwk Limited | Hospitality | 2025 |
| CM Care Service Limited | Health & social care | 2014 |
| CM Climate Technologies Ltd | Construction | 2023 |
| CM Project Developments Ltd | Construction | 2017 |
| CM Triggs Fishmongers Limited | Wholesale & retail | 2025 |
| CMA Residential Limited | Real estate | 2023 |
| Cmack Properties Limited | Real estate | 2022 |
| CMC Education Ltd | Professional & scientific | 2026 |
| CMJ Accountancy Ltd | Professional & scientific | 2010 |
| CMR Construction Services (UK) Limited | Professional & scientific | 2013 |
| CMS Infosec Ltd | Information & communication | 2025 |
| Cmwriter Ltd | Arts & recreation | 2023 |
| CN Welding Services Ltd | Construction | 2016 |
| CNC Direct Limited | Wholesale & retail | 2000 |
| Co Create Partnership Limited | Professional & scientific | 2022 |
| Co-Create Management Solutions Limited | Professional & scientific | 2016 |
| Co-Create Property Management Limited | Real estate | 2016 |
| Coaching With Charlotte Limited | Administrative & support | 2025 |
| Coal Electrical Ltd. | Construction | 2013 |
| Coastal Heating and Plumbing Limited | Construction | 2014 |
| Coastal WK Ltd | Hospitality | 2026 |
| Cobain & SON Limited | Construction | 2019 |
| Cobble and HAY CIC | Manufacturing | 2025 |
| Cobblers 'N' Keys (ACR) Ltd | Other services | 2023 |
| Coburg Sourcing Limited | Wholesale & retail | 2025 |
| Cockshott Services Limited | Professional & scientific | 2021 |
| Coco Nails T Ltd | Other services | 2025 |
| Coco's Beauty and Training Ltd | Other services | 2019 |
| Cocoberry Ltd | Hospitality | 2025 |
| Cocreate Design and Marketing Ltd | Information & communication | 2008 |