| Carlisle Rugby Football Club Limited | Arts & recreation | 2010 |
| Carlisle Scaffolding Limited | Construction | 1998 |
| Carlisle Shop Ltd | Wholesale & retail | 2026 |
| Carlisle Sky Limited | Hospitality | 2019 |
| Carlisle South-End Constitutional Club Limited(The) | Hospitality | 1952 |
| Carlisle Squash and Racketball Club Limited | Arts & recreation | 2019 |
| Carlisle Stays Ltd | Hospitality | 2026 |
| Carlisle Steel Supplies Limited | Wholesale & retail | 2021 |
| Carlisle Storage Services Limited | Transport & logistics | 2021 |
| Carlisle Style Ltd | Other services | 2021 |
| Carlisle TAE Kwon DO Limited | Arts & recreation | 2006 |
| Carlisle Taxi Ltd | Transport & logistics | 2026 |
| Carlisle Taxi Rentals Ltd | Administrative & support | 2024 |
| Carlisle Trade Frames Limited | Construction | 2023 |
| Carlisle Trophies Limited | Real estate | 2023 |
| Carlisle United Association Football Club (1921) Limited | Arts & recreation | 1921 |
| Carlisle United FC Community Sports Trust | Arts & recreation | 2008 |
| Carlisle Villa Amateur Boxing Club | Arts & recreation | 2010 |
| Carlisle Vineyard Church | Health & social care | 2013 |
| Carlisle Waiting Room Limited | Hospitality | 2015 |
| Carlisle Waverley Viaduct Trust | Education | 2015 |
| Carlisle WET Belts Ltd | Wholesale & retail | 2026 |
| Carlisle Window Systems Limited | Construction | 2000 |
| Carlisle Xtreme Sports Limited | Arts & recreation | 2003 |
| Carlisle Youth Zone | Administrative & support | 2009 |
| Carlisle-Aesthetics Ltd | Health & social care | 2019 |
| Carlisle-Clubhouse Ltd | Hospitality | 2025 |
| CARLISLE247365TAXIS Limited | Transport & logistics | 2021 |
| Carlislesolutions Ltd | Construction | 2019 |
| Carlton Business Associates Limited | Public administration | 2023 |
| Carlton House Keswick Limited | Real estate | 2019 |
| Carm Property Developments Limited | Construction | 2021 |
| Carmel Bones Education Limited | Education | 2013 |
| Carmichael Joinery Limited | Construction | 2017 |
| Carmoodie Consulting Limited | Professional & scientific | 2019 |
| Carol's Bridal Ltd | Wholesale & retail | 2024 |
| Caroline Martin Property Ltd | Real estate | 2013 |
| Caron Turner Holistic & Beauty Therapy Limited | Other services | 2011 |
| Carr Baugh Firbank Limited | Administrative & support | 2017 |
| Carr Sterne Group Limited | Hospitality | 2023 |
| Carr Sterne LLP | | 2010 |
| Carr's Group Corporate Trustee Limited | Professional & scientific | 2015 |
| Carrigan-Haines Limited | Construction | 2025 |
| Carrs Billington Agriculture (Sales) Limited | Manufacturing | 1923 |
| Carrs Properties Limited | Real estate | 1906 |
| Carrsterne Scot Ltd | Hospitality | 2024 |
| Cartmell Shepherd Limited | Professional & scientific | 2014 |
| Cartmell Shepherd Trust Company Limited | Other services | 2020 |
| Cartner Defreitas Limited | Extraterritorial | 2005 |
| Carvetii Accommodation Limited | Hospitality | 2018 |
| Carvetii Contracts Ltd | Real estate | 2018 |
| Carvetii Properties LLP | | 2018 |
| Carvetii Property Solutions Ltd | Real estate | 2019 |
| Carvetii Services Limited | Water & waste | 2021 |
| Casa Bella Restaurant Limited | Hospitality | 2010 |
| Casanova Menswear Limited | Wholesale & retail | 2002 |
| Caspian Restaurants Limited | Hospitality | 2003 |
| Cassidyconstructionuk Ltd | Administrative & support | 2024 |
| Castle Sports Group Limited | Arts & recreation | 2023 |
| Castle View Finance Limited | Financial services | 2021 |
| Castle View Property Finance Ltd | Financial services | 2023 |
| Castlerigg Consulting Limited | Professional & scientific | 2008 |
| Castlerise Consulting Ltd | Professional & scientific | 2025 |
| Castletown Trst LLP | | 2008 |
| Castletown Woodland Weddings Ltd | Construction | 2019 |
| Castley Property Ltd | Real estate | 2021 |
| Castling Properties Ltd | Real estate | 2025 |
| Casualist Limited | Wholesale & retail | 2025 |
| Cat MAY Ltd | Administrative & support | 2020 |
| Catherine Paige Bridal Ltd | Wholesale & retail | 2016 |
| Catlowdy Carriages Ltd | Wholesale & retail | 2015 |
| Cawson Consultants Ltd | Manufacturing | 2022 |
| Caynedale Ltd | Agriculture & fishing | 2022 |
| CB Building Developments Ltd | Construction | 2024 |
| CB Systems Ltd | Construction | 2025 |
| CBH Environmental Ltd | Water & waste | 2018 |
| CBT Interventions Limited | Health & social care | 2013 |
| CC Estate Management Limited | Households | 2023 |
| CC Groundworks (Cumbria) Ltd | Construction | 2022 |
| CCE Cars Limited | Wholesale & retail | 2022 |
| CCG Cleaning Ltd | Extraterritorial | 2021 |
| CCH Engineering Limited | Extraterritorial | 2008 |
| CCLS2012HOLDINGS Limited | Financial services | 2026 |
| CCMLTD2023 Limited | Wholesale & retail | 2026 |
| CCR Services Ltd | Information & communication | 2024 |
| CCS Lets Limited | Real estate | 2025 |
| CD Nominees Limited | Real estate | 2003 |
| CD Property Developments Limited | Real estate | 2023 |
| CDL Building Contractors Limited | Construction | 2024 |
| Cecil Street Auto Repairs Limited | Wholesale & retail | 2010 |
| Cedar & Oak Ltd | Wholesale & retail | 2021 |
| Cedar Mortgage Services Ltd | Professional & scientific | 2025 |
| Cedarhurst Lodge (Spring) Limited | Health & social care | 2019 |
| CEL Plumbing & Heating Engineers Ltd | Construction | 2017 |
| Celebrations Card & Party Store Limited | Wholesale & retail | 2003 |
| Celsius Doors Limited | Construction | 2018 |
| Celsius Engineering Services Limited | Manufacturing | 2010 |
| Central Bakery Limited | Hospitality | 2018 |
| Central Bakery Morton Limited | Hospitality | 2023 |
| Centralview Technologies Limited | Extraterritorial | 2007 |