| CL1VE Limited | Extraterritorial | 2020 |
| Claimstech Ltd | Professional & scientific | 2013 |
| Claire Whitaker Limited | Real estate | 1989 |
| Claires Artistic Licence Ltd | Manufacturing | 2025 |
| Clan Architects Ltd | Professional & scientific | 2025 |
| Claremont House Wealth Management Ltd | Financial services | 2025 |
| Claremont Managed Services Limited | Professional & scientific | 2019 |
| Clarence Drive Estates LLP | | 2015 |
| Clarendon Property Partnership Ltd | Real estate | 2020 |
| Clarendon Radiologists LLP | | 2008 |
| Clarion Leadership Ltd | Administrative & support | 2023 |
| Clarity Arts Limited | Manufacturing | 2011 |
| Clarity Construction Limited | Construction | 2008 |
| Clarity Consulting Emea Limited | Information & communication | 2017 |
| Clarity Furniture Limited | Wholesale & retail | 2000 |
| Claritygrc Ltd | Professional & scientific | 2026 |
| Claro Connections Ltd | Professional & scientific | 2024 |
| Claro Enterprises | Health & social care | 1989 |
| Classic & Iconic Cars Ltd | Wholesale & retail | 2013 |
| Classic Cosmetics Training Academy Limited | Other services | 2022 |
| Classic Marques (Harrogate) Limited | Wholesale & retail | 1997 |
| Classic Sash Restoration Limited | Manufacturing | 2007 |
| Classroom Collective Ltd | Administrative & support | 2026 |
| Claude Montanier Limited | Wholesale & retail | 2022 |
| Clayton Clarkson Partnership Limited | Construction | 2007 |
| Clayton Freeman Limited | Wholesale & retail | 2024 |
| Claytons Carpets Homestyle & Gifts Ltd | Wholesale & retail | 2021 |
| Claytons Gifts Limited | Wholesale & retail | 2023 |
| Clean & Sparkle Yorkshire Ltd | Administrative & support | 2023 |
| Clean JET Ltd | Administrative & support | 2026 |
| Cleana Ltd | Administrative & support | 2026 |
| Cleanbright (Harrogate) Limited | Administrative & support | 2016 |
| Cleanily Ltd | Information & communication | 2015 |
| Cleaning Expert Ltd | Administrative & support | 2025 |
| Clear Mind CBT Ltd | Health & social care | 2021 |
| Clear Path Consulting Services Ltd | Professional & scientific | 2025 |
| Clear Pour Ltd | Wholesale & retail | 2020 |
| Clear Skies Energy Ltd | Construction | 2022 |
| Clear Sky Drones Ltd | Professional & scientific | 2023 |
| Clear Ways Consulting Ltd | Information & communication | 2023 |
| Clearpoint CB1 Ltd | Water & waste | 2026 |
| Clearpoint Farms Limited | Wholesale & retail | 2019 |
| Clearpoint Recycling Limited | Water & waste | 2012 |
| Cleartech Design Limited | Manufacturing | 2018 |
| Clearvu Properties Limited | Construction | 2018 |
| Clearworld Limited | Professional & scientific | 2019 |
| Cleveland Bay Horse Society of the United Kingdom | Other services | 1886 |
| Cleverass Limited | Construction | 2003 |
| Clevershot Limited | Professional & scientific | 2012 |
| Click 4 Currency Limited | Financial services | 2010 |
| Clickabook Limited | Wholesale & retail | 2019 |
| Clicking With Canines Limited | Administrative & support | 2022 |
| Clifford Engineering Ltd | Professional & scientific | 2024 |
| Clifford Moor Farm Livery Ltd | Agriculture & fishing | 2014 |
| Clifford Moor Farm Pet Hotel Ltd | Agriculture & fishing | 2014 |
| Clifton House Flats (Harrogate) Management Co. Limited | Households | 1976 |
| Clifton Properties (Harrogate) Limited | Administrative & support | 2017 |
| Clini-Pure Group Ltd. | Wholesale & retail | 2025 |
| Clinical Reporting Ltd | Information & communication | 2011 |
| Clinicept Healthcare Limited | Wholesale & retail | 2015 |
| Clive Ekin Building Services Limited | Construction | 2003 |
| Clonera Commodities Ltd | Professional & scientific | 2025 |
| Clonera Ltd | Professional & scientific | 2025 |
| Clonera Triage Ltd | Professional & scientific | 2025 |
| Cloth Fair Point Capital Limited | Professional & scientific | 2014 |
| Clothing Suppliers Ltd | Wholesale & retail | 2024 |
| Cloud King Creative Limited | Information & communication | 2013 |
| Cloud Nine International Limited | Financial services | 2017 |
| Cloud Traffic Ltd | Information & communication | 2018 |
| Cloud Yorkshire Limited | Information & communication | 2014 |
| Cloudbay Limited | Professional & scientific | 2013 |
| Cloudblaze Ltd | Information & communication | 2018 |
| Clover 4 Investments Ltd | Real estate | 2023 |
| Club America Limited | Extraterritorial | 2012 |
| Club Australia Limited | Extraterritorial | 2012 |
| Club Enpar Limited | Wholesale & retail | 2025 |
| Club Great Britian Limited | Extraterritorial | 2012 |
| Club Scandinavia Limited | Extraterritorial | 2012 |
| Club World Wide Limited | Extraterritorial | 2012 |
| Clubman Consulting Ltd | Professional & scientific | 2017 |
| Clue Circle Investments Limited | Households | 2025 |
| Clue HQ - Harrogate Ltd | Arts & recreation | 2018 |
| CMA Investments Ltd | Financial services | 2019 |
| CMC Partners Executive Search Ltd | Administrative & support | 2024 |
| Cmis-Uk Limited | Information & communication | 2010 |
| CN24 Ltd | Real estate | 2024 |
| CNG EBT Limited | Other services | 2015 |
| CNG Energy Advisory Limited | Professional & scientific | 2026 |
| CNG Retail Holdco Limited | Financial services | 2019 |
| CNG Switch Limited | Administrative & support | 2017 |
| CNJ Merchandise Ltd | Other services | 2022 |
| CNS Advisory Ltd | Professional & scientific | 2018 |
| Cnvs (NG219PS) Ltd | Construction | 2022 |
| Cnvs (S60 8DB) Ltd | Construction | 2022 |
| Cnvs (WF84QD) Ltd | Construction | 2022 |
| Co-Dot Ltd | Extraterritorial | 2015 |
| COA Building Services Limited | Construction | 2019 |
| COA Services Limited | Construction | 2020 |
| Coach House Homes Limited | Real estate | 2021 |
| Coaching Careers Cultivation Ltd | Education | 2019 |