| C-Paste Limited | Manufacturing | 2020 |
| C. Calvert Property Ltd | Real estate | 2024 |
| C2 Investment Limited | Hospitality | 2001 |
| C3 Biotechnologies (Acrylics) Limited | Professional & scientific | 2023 |
| C3 Biotechnologies (Bio-Propane) Limited | Professional & scientific | 2021 |
| C3 Biotechnologies (Energetic Materials) Limited | Professional & scientific | 2024 |
| C3 Biotechnologies (Hypersonics) Limited | Professional & scientific | 2024 |
| C3 Biotechnologies (Maritime and Aerospace) Limited | Professional & scientific | 2020 |
| C3 Biotechnologies Limited | Professional & scientific | 2015 |
| C4 Evans Group Limited | Administrative & support | 2021 |
| C4B Properties Limited | Real estate | 2021 |
| Cadman (Lancashire) Holdings Limited | Financial services | 2019 |
| Caer Weridd Ltd | Hospitality | 2012 |
| Cage Technologies Limited | Professional & scientific | 2016 |
| Calder Lodge (Properties) Limited | Financial services | 2019 |
| Calder Lodge Limited | Education | 2019 |
| Calico Digital Ltd | Information & communication | 2015 |
| Calidum Ltd | Manufacturing | 2019 |
| Calluna Furnishings Ltd | Manufacturing | 2023 |
| Calluna HR Ltd | Administrative & support | 2024 |
| CAM Photography Lancaster Limited | Professional & scientific | 2018 |
| Camcon Ltd | Wholesale & retail | 2011 |
| Campbell 3 Ltd | Real estate | 2007 |
| Campbell's Quality Care Ltd | Health & social care | 2025 |
| Cancercare (North Lancashire & South Cumbria) | Health & social care | 2007 |
| Candice Conway Theatre Camps Limited | Health & social care | 2015 |
| Candid Eight Ltd | Professional & scientific | 2021 |
| Capacity Assessment Expert Ltd | Health & social care | 2025 |
| Careers Ideas Ltd | Professional & scientific | 2023 |
| Caribou Glasson Dock Management Limited | Other services | 2001 |
| Carnegie Publishing Limited | Information & communication | 1988 |
| Carnforth Community Swimming Pool Ltd | Other services | 2017 |
| Carnforth Storage Limited | Transport & logistics | 2016 |
| Caroline Rose Management Limited | Administrative & support | 2007 |
| Carr Royd Parks Limited | Hospitality | 1971 |
| Cartmel Joinery Limited | Construction | 2006 |
| Carus Group Limited | Professional & scientific | 2024 |
| Casa Mandian Limited | Real estate | 2011 |
| CASH4CLUNKERS Ltd | Wholesale & retail | 2025 |
| Castle Court (Lancaster) Residents Association Ltd | Real estate | 1986 |
| Castle Knights Limited | Hospitality | 2014 |
| Castle Properties Lancaster Limited | Real estate | 2011 |
| Castle Spirits Limited | Manufacturing | 2023 |
| Castlegate Management Company (Flats) Limited | Households | 1994 |
| Castlegate Security Services Ltd. | Administrative & support | 2000 |
| Castleview Management Company Limited | Real estate | 1990 |
| Castrum Hotel Management Limited | Hospitality | 2023 |
| Catalysis Ltd | Other services | 2023 |
| Catenate UK Limited | Manufacturing | 2008 |
| Cater Nest Ltd | Hospitality | 2021 |
| Caton Dental Practice Ltd | Health & social care | 2024 |
| Caton Gala Limited | Arts & recreation | 2008 |
| Catspaw Digital Limited | Professional & scientific | 2015 |
| Cavespace Limited | Real estate | 2018 |
| CB Holdings (NW) Limited | Hospitality | 2017 |
| CBH Training Limited | Education | 2001 |
| Cbthub Ltd | Information & communication | 2023 |
| CCO (Holdings) Limited | Professional & scientific | 2019 |
| CDR Detailing Ltd | Professional & scientific | 2012 |
| Cece Care Services Ltd | Health & social care | 2023 |
| Cedar Financial Management Limited | Professional & scientific | 2002 |
| Cedar Lodge (Lancaster) Management Company Limited | Households | 2001 |
| Celb Consulting Ltd | Professional & scientific | 2016 |
| Celesto Enterprises Limited | Professional & scientific | 2014 |
| Centaura Ltd | Professional & scientific | 2013 |
| Centre for Sewage Impact Limited | Professional & scientific | 2026 |
| CF Overhead Installation Ltd | Construction | 2018 |
| Cfmc Development Company Limited | Construction | 2014 |
| CH Bar and Restaurant Ltd | Hospitality | 2025 |
| Chakwal Lettings Limited | Real estate | 2024 |
| Chakwal Trade Ltd | Wholesale & retail | 2026 |
| Chameleon on an Iceberg Limited | Administrative & support | 2022 |
| Channel C Consultancy LLP | | 2009 |
| Chapelside Management Company Limited | Households | 2019 |
| Charles Drinks Ltd | Hospitality | 2026 |
| Charlie Hickson Ltd | Wholesale & retail | 2025 |
| Charlotte Foster Dance Ltd | Arts & recreation | 2023 |
| Charmbond Ltd | Real estate | 2023 |
| Charming MAN PR Limited | Professional & scientific | 2018 |
| Check-On Enterprises Limited | Wholesale & retail | 2010 |
| Chef Cahit Ltd | Hospitality | 2023 |
| Chefs Catering Northwest Ltd | Hospitality | 2020 |
| Chefs Recruitment Limited | Administrative & support | 2018 |
| Chen-Barclay Ltd | Administrative & support | 2017 |
| Chesworth Medical Limited | Health & social care | 2015 |
| Childhood Neurodiversity Limited | Health & social care | 2026 |
| Chillinca Limited | Information & communication | 2026 |
| Chipah Limited | Other services | 2014 |
| Chiptech International Limited | Wholesale & retail | 2019 |
| Choicetarget Property Management Limited | Households | 1989 |
| Choose Broadband Limited | Information & communication | 2012 |
| Choose Domain Names Limited | Information & communication | 2011 |
| Choose Hosting Limited | Information & communication | 2020 |
| Chris Edmondson Joinery & Building Ltd | Construction | 2022 |
| Chris Robinson (Plumb-Fast) Limited | Construction | 2019 |
| Chris Welsby Quantity Surveyors Limited | Professional & scientific | 2006 |
| Christines Pristine Cleaning & Decorating Limited | Construction | 2022 |
| Chromebridge Limited | Other services | 1995 |
| Chronotaxia Ltd | Wholesale & retail | 2025 |
| Church House 96 Ltd | Real estate | 2016 |