| Church Street Chop House Limited | Hospitality | 2017 |
| Cibrex Ltd | Information & communication | 2011 |
| Circa Construction Limited | Construction | 2022 |
| Cirrus 9 Design Limited | Professional & scientific | 2001 |
| Citadel Flooring Limited | Construction | 2025 |
| City Mini Market Lancaster Ltd | Wholesale & retail | 2025 |
| Cityblock (Lancaster 4) Limited | Construction | 2011 |
| Cityblock (Lancaster 6) Limited | Construction | 2018 |
| Cityblock Lettings (Lancaster 4) Limited | Hospitality | 2016 |
| Cityblock Lettings (Lancaster 6) Limited | Hospitality | 2018 |
| Cityspace (Lancaster) LLP | | 2015 |
| Citywide Paving and Resin Ltd | Construction | 2025 |
| CJA Joinery Limited | Construction | 2014 |
| CKJ Topco Ltd | Information & communication | 2022 |
| Clarabelle Consulting Limited | Information & communication | 2015 |
| Claremont Property Ltd | Real estate | 2023 |
| Clarity Business Support Limited | Administrative & support | 2025 |
| Clarity Investment Group Limited | Financial services | 2025 |
| Clarkson Hirst Solicitors Limited | Professional & scientific | 2010 |
| Classic Cruises Limited | Administrative & support | 2002 |
| Classic Shaker Design Ltd | Construction | 2019 |
| Claughton Hall (Bisons) Limited | Agriculture & fishing | 1987 |
| Claughton Hall Estate Limited | Agriculture & fishing | 2020 |
| Claughton Homes Ltd | Hospitality | 2022 |
| Clean & Organised With Hayley Ltd | Administrative & support | 2021 |
| Cleaner Bentham Limited | Professional & scientific | 2024 |
| Clear Directions - Training & Development Ltd | Education | 2019 |
| Clearance Direct Ltd | Wholesale & retail | 2019 |
| Clementine Financial Limited | Financial services | 2013 |
| Cleveleys Commercials Ltd | Wholesale & retail | 2026 |
| Cleveleys Ltd | Transport & logistics | 2010 |
| Clifford FOX Limited | Real estate | 2025 |
| Climate Emergency UK C.I.C. | Information & communication | 2019 |
| Clocktower Block Management Ltd | Real estate | 2024 |
| Clocktower DPP Ltd | Real estate | 2020 |
| Clocktower Leasehold Properties Ltd | Real estate | 2025 |
| Close Protection International Ltd | Administrative & support | 2023 |
| Cloud Connections NW Limited | Information & communication | 2026 |
| Cloudy Days Crafts Ltd | Wholesale & retail | 2026 |
| Clovertree Property Limited | Real estate | 2022 |
| Cmcraftsuk Ltd | Manufacturing | 2025 |
| CME Artist Services Limited | Arts & recreation | 2006 |
| CMG Arts Ltd | Arts & recreation | 2021 |
| CMI Shipping Ltd | Administrative & support | 2019 |
| Cmon Systems Limited | Manufacturing | 2000 |
| Co-Creating Health and Well-Being Ltd | Professional & scientific | 2025 |
| CO2 Extraction Limited | Manufacturing | 2018 |
| Coastal and Co the Bay Ltd | Hospitality | 2021 |
| Coastal Construction Northwest Ltd | Construction | 2025 |
| Coastal Drains (NW) Ltd | Administrative & support | 2026 |
| Coastal Racing Limited | Wholesale & retail | 2002 |
| Cockerham Green Energy Limited | Energy | 2010 |
| Cockerside Caravan Park Limited | Hospitality | 2003 |
| Code Warden Limited | Information & communication | 2019 |
| Codeclass Limited | Information & communication | 2006 |
| COG Brands Ltd | Wholesale & retail | 2025 |
| Coldstream Holiday Park Limited | Hospitality | 2025 |
| Colin Hartness Deliveries Limited | Transport & logistics | 2003 |
| Colin Procter Building Contractor Ltd | Construction | 2013 |
| Collins Property Network Ltd | Professional & scientific | 2023 |
| Colourwheel Fylde Coast Limited | Education | 2021 |
| Colt Park Limited | Agriculture & fishing | 2012 |
| Commercial Groundworks Limited | Construction | 2010 |
| Community Mind Connect C.I.C. | Arts & recreation | 2023 |
| Community Pizza Events CIC | Hospitality | 2022 |
| Company Management Services Limited | Professional & scientific | 2020 |
| Compass Construction Group Ltd | Construction | 2017 |
| Competizione Limited | Wholesale & retail | 2025 |
| Complete Access & Tree Services Limited | Other services | 2006 |
| Condex (UK) Limited | Manufacturing | 1997 |
| Confidante Cloud Services Limited | Information & communication | 2022 |
| Coniston Court (Morecambe) Management Company Limited | Households | 1991 |
| Connor Associates Limited | Health & social care | 2003 |
| Conrad Construction Consultancy Ltd | Construction | 2021 |
| Conservefor Limited | Administrative & support | 2012 |
| Consilius Limited | Professional & scientific | 2012 |
| Constant Training Ltd | Education | 2022 |
| Consult Ryan Ltd | Professional & scientific | 2014 |
| Consult YO Limited | Professional & scientific | 2014 |
| Consumer Legal Association Ltd | Other services | 2026 |
| Contech Consulting Limited | Professional & scientific | 2018 |
| Content by Victoria Ltd | Information & communication | 2023 |
| Content Meant Limited | Information & communication | 2013 |
| Control ALT Repeat Limited | Wholesale & retail | 2019 |
| Conway Caravans Limited | Hospitality | 2017 |
| Cooling & Heating Services Ltd | Construction | 2014 |
| Coordimate Limited | Information & communication | 2022 |
| Copia Technology Ltd | Information & communication | 2026 |
| Corebind | Hospitality | 2008 |
| Cornmarket Management Company Ltd | Households | 2021 |
| Cornthwaite Moors Limited | Manufacturing | 2013 |
| Corvane Ltd | Wholesale & retail | 2025 |
| Cosmas IR Limited | Other services | 2016 |
| Cosmetic Facial Aesthetics Ltd | Health & social care | 2017 |
| Cosmic White Rabbit Limited | Information & communication | 2021 |
| Cost Estimator Ltd | Professional & scientific | 2019 |
| Cosy Travel Ltd | Transport & logistics | 2025 |
| Country Meats Bentham Limited | Wholesale & retail | 2017 |
| Covepath Limited | Professional & scientific | 2002 |
| Cowan Construction Limited | Construction | 1988 |