| C W COX & Sons (Kendal) Limited | Construction | 1998 |
| C&C Plumbing, Heating and GAS Limited | Construction | 2024 |
| C&Dp Services Limited | Administrative & support | 2023 |
| C&L Munro Ltd | Administrative & support | 2023 |
| C.J.P.M Ltd | Administrative & support | 2023 |
| Cable & Blake Limited | Manufacturing | 2018 |
| Cable Ties Direct Ltd | Wholesale & retail | 2024 |
| Cadence Creative Ltd | Professional & scientific | 2017 |
| Cairn Education CIC | Education | 2021 |
| Calder Chemicals Limited | Manufacturing | 1979 |
| California Ocean Northumbria Ltd | Transport & logistics | 2020 |
| Calvary South Lakes Limited | Other services | 2008 |
| Cameron Investment Group Ltd | Construction | 2019 |
| Canal Gardens Management Limited | Households | 1995 |
| Canal Head Property Limited | Real estate | 2016 |
| Cannon HEY Estates Limited | Other services | 1960 |
| Cannons Building Contractors Limited | Construction | 2001 |
| Cannons Holdings Limited | Financial services | 2019 |
| Canon Winder Farms | Administrative & support | 2008 |
| Capplebarrow Limited | Agriculture & fishing | 2022 |
| Capstick Holdings Ltd | Financial services | 2025 |
| Carer Support Cumbria Limited | Health & social care | 2014 |
| Carer Support South Lakes | Health & social care | 2011 |
| Carter Roofing Services Limited | Construction | 2015 |
| Cartmel Care Limited | Other services | 2017 |
| Carus Developments Limited | Hospitality | 2015 |
| Carus Elite Potential Limited | Wholesale & retail | 2016 |
| Carus Green Limited | Arts & recreation | 2010 |
| Casa Project Ltd | Real estate | 2022 |
| Cascade Productions International Limited | Information & communication | 1999 |
| Castle Crockery Event Hire Limited | Administrative & support | 2017 |
| Castle Design Services Limited | Professional & scientific | 2015 |
| Castle Fire Limited | Public administration | 2001 |
| Castle Ironworks Limited | Arts & recreation | 2015 |
| Castle Stores Kendal Limited | Wholesale & retail | 2016 |
| Castlesteads Developments Limited | Construction | 2002 |
| Cat Wine Bars Ltd | Hospitality | 2019 |
| Catalyst Collective Global Limited | Professional & scientific | 2018 |
| Catena Solutions Ltd | Professional & scientific | 2014 |
| Cawpa News Limited | Information & communication | 2015 |
| Cedarwood Spas Limited | Manufacturing | 2020 |
| Celia PVT Ltd | Wholesale & retail | 2023 |
| Ceridwen Vintage Ltd | Information & communication | 2012 |
| Certified Resource Solutions Ltd | Administrative & support | 2025 |
| Certra Limited | Extraterritorial | 2001 |
| Chancery House (Liverpool) LLP | | 2013 |
| Charlie Bell Building Limited | Construction | 2019 |
| Charlie's Kendal Limited | Hospitality | 2019 |
| CHC MOT Centre Limited | Extraterritorial | 2017 |
| Cherrie's Cafe Ltd | Hospitality | 2024 |
| Cherry Tree Apartments Management Company Limited | Real estate | 1991 |
| Chess Surveying Limited | Professional & scientific | 2005 |
| Chestnut Close (Holme) Management Limited | Hospitality | 2020 |
| Chetwood Estates Ltd | Real estate | 2025 |
| Cheviot Ecology Ltd | Professional & scientific | 2021 |
| Chickpea Press Limited | Information & communication | 2012 |
| China Garden Kendal Ltd | Hospitality | 2026 |
| Chirnsides Limited | Real estate | 1927 |
| Chiron Scientific Writing Limited | Professional & scientific | 2015 |
| Chris Osborne Limited | Health & social care | 2022 |
| Chris Pickthall Ltd | Construction | 2002 |
| Chris Wharton Services Limited | Professional & scientific | 2012 |
| Cicerone Press Limited | Information & communication | 1998 |
| Cinnamonltd.Com Limited | Administrative & support | 2006 |
| Circulio Solutions Limited | Information & communication | 2016 |
| Cjgsa Limited | Financial services | 2025 |
| CJP Building Contractors Limited | Construction | 2014 |
| Clarence House Developments Limited | Construction | 2003 |
| Clean (LNS) Limited | Administrative & support | 2020 |
| Clearspell Limited | Wholesale & retail | 2021 |
| Cleves Care Services Ltd | Administrative & support | 2025 |
| Climb 365 Limited | Other services | 2013 |
| Climbers Against Cancer Trading Limited | Wholesale & retail | 2014 |
| Climbing Bouldering Supply Company Ltd | Manufacturing | 2020 |
| Clint Davis Limited | Wholesale & retail | 2008 |
| Close BAI Creations Limited | Wholesale & retail | 2025 |
| Club 13 Industries Ltd | Hospitality | 2025 |
| Clutch Co Productions Ltd | Information & communication | 2025 |
| Cmoran Locum Ltd | Health & social care | 2022 |
| CNL Building Services Limited | Professional & scientific | 2008 |
| Code North Limited | Information & communication | 2021 |
| COG Properties Limited | Real estate | 2015 |
| College Court (Windermere) Limited | Households | 1985 |
| College Mews (Kendal) Management Company Ltd | Real estate | 2005 |
| Collin Croft Management Company Limited | Households | 1996 |
| Collingridge Architects Ltd | Professional & scientific | 2012 |
| Colman & Colman Hairdressers Limited | Other services | 2017 |
| Comida [Food] Limited | Hospitality | 2017 |
| Community Club C.I.C. | Health & social care | 2017 |
| Consultancy & Auditing Services Ltd | Professional & scientific | 2021 |
| Contour Accountancy Limited | Professional & scientific | 2015 |
| Contour Campervan Furniture Ltd | Manufacturing | 2020 |
| Conveyancing Training Solutions Ltd | Professional & scientific | 2023 |
| Cool Conduct Technologies Limited | Professional & scientific | 2026 |
| Coolcrafting Limited | Wholesale & retail | 2020 |
| Cooper Family Investments Ltd | Financial services | 2022 |
| Core Taekwondo Academy CIC | Education | 2021 |
| Cornerstone Training North West Limited | Education | 2011 |
| Cornvale Foods Holdings Limited | Financial services | 2020 |
| Corso Holdings Ltd | Financial services | 2026 |