| Chris Land Construction & Civil Engineering Ltd | Construction | 2012 |
| Chris Sutton Flow Ltd | Administrative & support | 2026 |
| Chris Wilkinson Financial Services Limited | Financial services | 2008 |
| Chris Wilkinson Limited | Real estate | 2020 |
| Chris Worswick Contractors Ltd | Construction | 2015 |
| Christine Brooks Ltd | Health & social care | 2024 |
| Christmas Lights Ltd | Wholesale & retail | 2009 |
| Christopher Andrew Cars Limited | Wholesale & retail | 2019 |
| Chrysalis Business Consultants Limited | Professional & scientific | 2020 |
| Churchill Security (UK) Limited | Professional & scientific | 1998 |
| Churchill Security Limited | Administrative & support | 2022 |
| Churchill Support Services Limited | Professional & scientific | 2008 |
| Cig-Ease (NW) Ltd. | Wholesale & retail | 2013 |
| Cig-Ease Ltd. | Extraterritorial | 2013 |
| Cinder Hospitality Limited | Hospitality | 2021 |
| Cipher Training Ltd | Education | 2025 |
| Cirax Compliance Ltd | Professional & scientific | 2023 |
| Circle Square Manchester Ltd | Wholesale & retail | 2021 |
| Circle Square Studio Ltd | Information & communication | 2025 |
| City 2 City Couriers Limited | Transport & logistics | 2014 |
| City Partnership Homes Limited | Construction | 1990 |
| City Remedial Limited | Construction | 2015 |
| Ciubotaru Couriers Ltd | Transport & logistics | 2025 |
| CJ Lawncare Limited | Administrative & support | 2011 |
| CJ Workplace Ltd | Financial services | 2021 |
| Cj's & Homes Ltd | Construction | 2022 |
| Cj's Plumbing and Handyman Services Ltd | Construction | 2024 |
| CJB Logistics Limited | Transport & logistics | 2015 |
| CJM Lancashire Ltd | Manufacturing | 2014 |
| CJM Tree Care Limited | Agriculture & fishing | 2022 |
| Cjnshippingcontainers Ltd | Wholesale & retail | 2026 |
| CJS Homes Ltd | Construction | 2023 |
| CK Fulfilment Ltd | Transport & logistics | 2023 |
| CL Brown TM Ltd | Construction | 2024 |
| CL Executive Travel (NW) Limited | Transport & logistics | 2024 |
| Claimspace Limited | Information & communication | 2019 |
| Claire Kenyon Landscapes Ltd | Administrative & support | 2022 |
| Clara and Faith Ltd | Health & social care | 2015 |
| Clare Corporate Ltd | Wholesale & retail | 2020 |
| Clarendon Financial Planning Limited | Professional & scientific | 2010 |
| Clarington Haulage Ltd | Transport & logistics | 2020 |
| Clarity Security Training Limited | Administrative & support | 2009 |
| Clarke Leisure Enterprises Ltd | Hospitality | 2023 |
| Clarks Hill Kennels & Cattery Limited | Other services | 2006 |
| Clarkson Electrical Services Ltd | Construction | 2023 |
| Class Cuts 40 Ltd | Other services | 2026 |
| Classic Creations (NW) Ltd | Manufacturing | 2026 |
| Clayton Rose Development Limited | Information & communication | 2022 |
| Clean Solutions 365 Ltd | Construction | 2025 |
| Clean Start Contractors Limited | Administrative & support | 2003 |
| Cleanfiniti Limited | Administrative & support | 2021 |
| Clear Advisory Limited | Professional & scientific | 2025 |
| Clear Path Insolvency Limited | Professional & scientific | 2022 |
| Clear Property (NW) Commercial Limited | Real estate | 2018 |
| Clear Property (NW) Limited | Real estate | 2015 |
| Clear This Ltd | Water & waste | 2022 |
| Clear View Park Home Surveyors Ltd | Manufacturing | 2022 |
| Clear Water Fisheries Limited | Agriculture & fishing | 2015 |
| Clearcode Digital Ltd | Information & communication | 2026 |
| Clearpests Ltd | Administrative & support | 2022 |
| Clearview Wealth Planning Limited | Financial services | 2026 |
| Cleud Ltd | Professional & scientific | 2026 |
| Client Commerce Limited | Professional & scientific | 2018 |
| Client Plus Marketing Ltd | Information & communication | 2018 |
| Clients Connected Limited | Administrative & support | 2011 |
| Clifford’S (NW) Limited | Construction | 2013 |
| Clifton Close Ltd | Real estate | 2026 |
| Clifton Nash Limited | Financial services | 2009 |
| Climatise Hvac Services Ltd | Energy | 2018 |
| Cloisters Continental Cafe Limited | Hospitality | 2012 |
| Close Property Ltd | Real estate | 2021 |
| Cloud Cuckoo Ltd | Information & communication | 2015 |
| Cloudest Consulting Limited | Information & communication | 2021 |
| Cloudest Holdings Limited | Financial services | 2025 |
| Cloudstack Ltd | Information & communication | 2018 |
| Cloudy Alley Limited | Wholesale & retail | 2017 |
| Clove Tree Limited | Financial services | 2006 |
| Clover Construction (Surrey) Ltd | Construction | 2020 |
| Clover Rise Management Company Limited | Households | 2021 |
| Cloverfield Properties Ltd | Real estate | 2019 |
| Club Boyss Limited | Other services | 2026 |
| CM Roofing & Leadwork Services Ltd | Construction | 2024 |
| Cmakhealthcare Ltd | Health & social care | 2021 |
| Cmgk Coaching Ltd. | Financial services | 2018 |
| Cmgk Enterprise Limited | Financial services | 2018 |
| Cmgk IPR Limited | Information & communication | 2018 |
| Cmgk Services Ltd | Health & social care | 2018 |
| CMJ Property Management Limited | Real estate | 2017 |
| CMR Projects Limited | Construction | 2025 |
| CMS Construction & Maintenance Services Ltd | Construction | 2024 |
| CMS Learning Limited | Other services | 2017 |
| Coached by Beck Ltd | Arts & recreation | 2023 |
| Cobham Lifting Limited | Transport & logistics | 2004 |
| Coblands Garden Centres Limited | Wholesale & retail | 2020 |
| Coblands Plants Ltd | Wholesale & retail | 2002 |
| Cockburn Lucas Independent Financial Consulting Limited | Financial services | 1997 |
| Cocoapod Chocolate Limited | Manufacturing | 2026 |
| Code & Quest Ventures Ltd | Information & communication | 2024 |
| Code Assertion Limited | Information & communication | 2010 |
| Code Smart Web Limited | Information & communication | 2025 |