| Cris Cleaner Service Ltd | Administrative & support | 2022 |
| Crispin Apartments Limited | Real estate | 2012 |
| Cristian Victor Simon Healthcare Ltd | Health & social care | 2025 |
| Critical Team Performance Ltd | Education | 2007 |
| CRM for Small Business Ltd | Information & communication | 2009 |
| Crockett and Hall Limited | Extraterritorial | 2012 |
| Croft (2025) Ltd | Financial services | 2025 |
| Croft Bespoke Joinery Ltd | Manufacturing | 2025 |
| Croft Builders & Property DEV Limited | Construction | 2011 |
| Croft Building & Joinery Contractors Limited | Construction | 2016 |
| Croft Farm Livery & Events Ltd | Agriculture & fishing | 2021 |
| Croft Garage Car and Commercial Ltd | Wholesale & retail | 2025 |
| Croft Lettings Ltd | Real estate | 2017 |
| Croft Properties (Harrogate) Limited | Real estate | 1960 |
| Cronk Trading Ltd | Manufacturing | 2020 |
| Crookrise Estate Limited | Real estate | 1997 |
| Cross Collective Ltd | Professional & scientific | 2024 |
| Crossland Group Limited | Wholesale & retail | 2024 |
| Crossley Evans Limited | Wholesale & retail | 1983 |
| Crowbeckle Ltd | Professional & scientific | 2024 |
| Crown Chambers Limited | Financial services | 2005 |
| Crown Place (Harrogate) Ltd | Manufacturing | 2009 |
| Crownbridge Investments Ltd | Construction | 2024 |
| Crunchthis Limited | Professional & scientific | 2012 |
| Crusade Event Merchandise Ltd | Administrative & support | 2022 |
| Crusade Event Traffic Limited | Administrative & support | 2017 |
| Cruse Consulting Ltd | Administrative & support | 2024 |
| CRX Transport Ltd | Transport & logistics | 2026 |
| Crymatics Limited | Information & communication | 1988 |
| Cryonorm Process Combustion Limited | Manufacturing | 2023 |
| Crystal Business Coaching Limited | Professional & scientific | 2015 |
| Crystal Business Training Limited | Professional & scientific | 1998 |
| Crystal Clear Cleaning Harrogate Ltd | Administrative & support | 2024 |
| Crystallum Systems Limited | Manufacturing | 2026 |
| Crystalyze Ltd | Professional & scientific | 2014 |
| CS ENG Ltd | Manufacturing | 2025 |
| CSC Consultants Limited | Administrative & support | 2012 |
| CSL Consult Ltd | Hospitality | 2019 |
| CSM Financial Limited | Professional & scientific | 2012 |
| Csma Consulting Limited | Financial services | 2013 |
| Csvb Developments Limited | Construction | 2024 |
| Ctmc Limited | Households | 2000 |
| CTS Alliance Ltd | Extraterritorial | 2017 |
| CUB Yoga Ltd | Education | 2025 |
| Cubic Interactive Limited | Information & communication | 2000 |
| Cubtech Ltd | Information & communication | 2025 |
| Culpus & Co Ltd | Professional & scientific | 2024 |
| Cultivating Wisdom Limited | Professional & scientific | 2005 |
| Cultura Landscapes Ltd | Administrative & support | 2022 |
| Cummins Ventures Limited | Extraterritorial | 2026 |
| Cuore Chamber Orchestra Ltd | Education | 2024 |
| Curbar AI Limited | Information & communication | 2025 |
| Curo Care Chichester Hall Limited | Health & social care | 2024 |
| Curo Care Delaheys Limited | Health & social care | 2021 |
| Curo Care Derwent Hall Limited | Health & social care | 2025 |
| Curo Care Group Limited | Health & social care | 2021 |
| Curo Care Hames Hall Limited | Health & social care | 2024 |
| Curo Care Lindisfarne Limited | Health & social care | 2021 |
| Curo Care Weir Limited | Health & social care | 2021 |
| Curo Care Woodleigh Limited | Health & social care | 2021 |
| Currently Nameless Limited | Extraterritorial | 2022 |
| CURT1S Limited | Extraterritorial | 2020 |
| Curtis International Limited | Manufacturing | 2008 |
| Curtis, Curtis & Sons Limited | Extraterritorial | 2018 |
| Custom Al-Rihla Group Limited | Wholesale & retail | 2024 |
| Custom Kutts Limited | Other services | 2024 |
| Custom Lettings Ltd | Households | 2021 |
| Cuthbert Holdings Ltd | Real estate | 2019 |
| Cutting Hedge Ltd | Administrative & support | 2003 |
| CVC Marketing Ltd | Professional & scientific | 2015 |
| Cyber Group Limited | Extraterritorial | 2025 |
| Cybermatrix Dynamics Ltd | Wholesale & retail | 2025 |
| Cyberxonic Ltd | Information & communication | 2025 |
| Cygnet Court (Harrogate) Limited | Households | 2012 |
| CYI Health Solutions Ltd | Health & social care | 2025 |
| D & a Livestock Limited | Agriculture & fishing | 2012 |
| D & J Motors Limited | Wholesale & retail | 2005 |
| D & J Randles Limited | Professional & scientific | 1998 |
| D & K Deacon Limited | Hospitality | 2008 |
| D & M Building Solutions Ltd | Construction | 2024 |
| D & M Design & Fabrication Limited | Manufacturing | 2010 |
| D & MA Sunderland & SON Limited | Transport & logistics | 1998 |
| D and G Barritt & Sons Limited | Information & communication | 1989 |
| D Chambers Roofing Limited | Construction | 2017 |
| D G Jayne Limited | Health & social care | 2024 |
| D K Stead Limited | Arts & recreation | 2004 |
| D M Electrical (Yorkshire) Ltd | Construction | 2012 |
| D Robertshaw Financial Services Limited | Financial services | 2010 |
| D Squared Technologies Limited | Extraterritorial | 2021 |
| D T Accountant Limited | Real estate | 2025 |
| D&D Leisure Yorkshire Limited | Hospitality | 2026 |
| D&G Fabbroni Ltd | Health & social care | 2016 |
| D. Delaney Groundworks & Plant Hire Ltd | Construction | 2022 |
| D. Hinds & Co Limited | Wholesale & retail | 2001 |
| D. R. Hawkins and Co. (Contractors) Limited | Wholesale & retail | 1986 |
| D.A. & J.E. Lestner Management Limited | Professional & scientific | 2016 |
| D1CE Ltd | Extraterritorial | 2020 |
| D4D Ltd | Extraterritorial | 2015 |
| Daffodilstar Limited | Other services | 2002 |
| Dagenham Pharma UK Ltd | Wholesale & retail | 2025 |