| Chris Rivers Landscapes Ltd | Administrative & support | 2014 |
| Chris Saunby Supply Chain Consultancy Ltd | Professional & scientific | 2020 |
| Chris Smith Builder & Contractor Limited | Construction | 2016 |
| Chris Stephenson Building Services Ltd | Construction | 2013 |
| Chris Tetley Limited | Professional & scientific | 2023 |
| Chris Topp and Company Limited | Manufacturing | 2002 |
| Chris Wood Hair Studio Ltd | Other services | 2015 |
| Chris Young Commercial Properties Ltd | Other services | 2025 |
| Chris Young Ltd | Hospitality | 2013 |
| Chrisalex Limited | Real estate | 2024 |
| Chrisbrownlee Limited | Extraterritorial | 2024 |
| Chrisp + Waterhouse Ltd | Professional & scientific | 2022 |
| Christ the Light Church | Other services | 2008 |
| Christian Association for Rural Development UK | Construction | 2011 |
| Christian James Capital Limited | Construction | 2020 |
| Christian Street Investments Limited | Professional & scientific | 2004 |
| Christians Care International Ltd | Other services | 2003 |
| Christians Care Ministries | Extraterritorial | 2012 |
| Christina Gabbitas Writing Ltd | Professional & scientific | 2012 |
| Christmas Lodge Ltd | Health & social care | 2014 |
| Christobeau Limited | Manufacturing | 2025 |
| Chromasol Limited | Manufacturing | 2013 |
| CHS Birmingham Limited | Administrative & support | 2020 |
| CHS Yorkshire Limited | Administrative & support | 2020 |
| Chuanguo Limited | Wholesale & retail | 2023 |
| Church Farm Liveries Limited | Agriculture & fishing | 2023 |
| Church Fenton Residents Company Limited | Households | 1998 |
| Church Mews (Acomb) Management Company Limited | Households | 1988 |
| Church Street Sweet Shop Limited | Wholesale & retail | 2018 |
| Churchbridge Homes Limited | Construction | 2021 |
| Churchills York Limited | Real estate | 2011 |
| Chutni & Grill Ltd | Hospitality | 2018 |
| Ciao York Ltd | Hospitality | 2026 |
| Cica Biomedical Limited | Health & social care | 2005 |
| Cielivestock Limited | Agriculture & fishing | 2015 |
| Ciko (York) Ltd | Hospitality | 2023 |
| Cinder Construction Ltd | Construction | 2016 |
| Cinderella Home Support Ltd | Health & social care | 2025 |
| Cinemarts Limited | Arts & recreation | 2017 |
| Cipfields Estate Agents Limited | Real estate | 1962 |
| Circle Garden Services (Yorkshire) Ltd | Administrative & support | 2021 |
| Circus Skills York CIC | Education | 2017 |
| Citadel Properties & Maintenance Ltd | Real estate | 2020 |
| Citibond Investments Limited | Real estate | 1999 |
| Citp Consultancy Ltd | Information & communication | 2019 |
| City Clean York Limited | Administrative & support | 2025 |
| City Cleaning (York) LLP | | 2018 |
| City Consulting (York) LLP | | 2015 |
| City Country Coast (Lettings) Ltd | Real estate | 2022 |
| City Investments York Limited | Real estate | 2019 |
| City of York Trading Limited | Administrative & support | 2011 |
| City Piazza Limited | Construction | 2000 |
| City Renting Ltd | Real estate | 2020 |
| City Short Let’S Limited | Real estate | 2026 |
| City ST Marys Ltd | Hospitality | 2020 |
| City Vibe Limited | Arts & recreation | 2025 |
| Cityfield Property Investment Ltd | Real estate | 2021 |
| Citylink Rentals Ltd | Administrative & support | 2025 |
| Cityroad Limited | Administrative & support | 2003 |
| Civstruk Services Ltd | Construction | 2024 |
| CJ & Buzz Limited | Construction | 2021 |
| CJ Business Consultancy Limited | Professional & scientific | 2019 |
| CJH Accountancy Solutions Limited | Professional & scientific | 2016 |
| CJH Immobilien Verwaltung Limited | Households | 2023 |
| CJH Ventures Limited | Information & communication | 2016 |
| CJR Property Holdings Limited | Real estate | 2016 |
| CJS IT Services Ltd | Information & communication | 2024 |
| CJS Legal Services Ltd | Other services | 2015 |
| CJS Motors Ltd | Agriculture & fishing | 2011 |
| CKE Holdings Limited | Real estate | 2023 |
| Ckmart Ltd | Wholesale & retail | 2026 |
| CL & Tenting (York) Ltd | Hospitality | 2023 |
| CL Fabrication Services Limited | Manufacturing | 2024 |
| CL Hire Limited | Administrative & support | 2022 |
| CL Medica Ltd | Health & social care | 2023 |
| CL Structures Limited | Wholesale & retail | 2024 |
| Claddesign Limited | Construction | 2018 |
| Claire Murphy Consulting Limited | Professional & scientific | 2026 |
| Claire's Pilates Education Limited | Arts & recreation | 2023 |
| Claire's Pilates Studio Limited | Arts & recreation | 2025 |
| Cland Limited | Professional & scientific | 2004 |
| Clapham Commercials Leasing Limited | Administrative & support | 2020 |
| Clapham Commercials Limited | Wholesale & retail | 2017 |
| Clapham Commercials York Limited | Administrative & support | 2020 |
| Clapham Moore Limited | Wholesale & retail | 2018 |
| Clara Golf Ltd | Wholesale & retail | 2022 |
| Clare & BEN Ltd | Real estate | 2019 |
| Clare Jackson RN Ltd | Health & social care | 2022 |
| Clare Mccarthy Limited | Information & communication | 2025 |
| Clarence Court Management Company (York) Limited | Real estate | 1998 |
| Clarence Drive Services Limited | Households | 2019 |
| Clarence Street York Management Company Ltd | Real estate | 2022 |
| Clares Accessories Limited | Other services | 2025 |
| Clarion Evolution Limited | Professional & scientific | 2022 |
| Clarior Solutions Limited | Professional & scientific | 2017 |
| Clarityscale Ltd | Information & communication | 2025 |
| Clark Legal Advisory Limited | Professional & scientific | 2025 |
| Clark Rail Consulting Limited | Professional & scientific | 2008 |
| Clark's Bakers (Easingwold) Limited | Manufacturing | 1985 |
| Claron Homes Ltd | Real estate | 2022 |