| Brathay Services Limited | Hospitality | 1976 |
| Brathay Trust | Education | 1993 |
| Brayshaw Heating Maintenance Limited | Construction | 2006 |
| Brian Hodge Limited | Transport & logistics | 2003 |
| Brian Moncur Ltd | Construction | 2003 |
| Briery Property Company Limited | Real estate | 1950 |
| Broad Oak Hydro Limited | Energy | 2012 |
| Brocklebanks of Dalton Ltd | Wholesale & retail | 2002 |
| Bromfield Farms (Holdings) Limited | Agriculture & fishing | 2006 |
| Brownrigg Hall Limited | Agriculture & fishing | 2006 |
| Brundholme House Management Limited | Households | 1999 |
| Bryan Haddow Ltd | Manufacturing | 2003 |
| Buckabank Farm Limited | Agriculture & fishing | 2007 |
| Burlington Aggregates Limited | Mining & quarrying | 2014 |
| Business Financial Management Services Limited | Professional & scientific | 2004 |
| Butchers Arms Ltd | Hospitality | 2003 |
| C & E Developments (Cumbria) Limited | Construction | 2004 |
| C G Golf Limited | Wholesale & retail | 2011 |
| C Rutland & SON Limited | Construction | 2003 |
| C. J. Joinery (Kendal) Limited | Construction | 2006 |
| C.F. Hygienic Pipes Ltd | Manufacturing | 2005 |
| C.P. Lishman Limited | Construction | 2001 |
| C4C Solutions (North West) Limited | Real estate | 2006 |
| Caenby Enterprises Limited | Wholesale & retail | 1999 |
| Cairnhead Farm Limited | Administrative & support | 2006 |
| CAL Enterprises Limited | Manufacturing | 2003 |
| Caldew Ltd | Professional & scientific | 1998 |
| Calthwaite Nursery | Education | 2004 |
| Canadian Canoe Company Limited | Transport & logistics | 2002 |
| Cannon Hire Haulage Limited | Transport & logistics | 1995 |
| Carboys Trading Limited | | 1964 |
| Cardonpark Limited | Real estate | 2000 |
| Carleton Fencing Limited | Construction | 2006 |
| Carleton Properties (Cumbria) Limited | Real estate | 1999 |
| Carlisle Business Supplies Limited | Wholesale & retail | 2002 |
| Carlisle Conservative Club Limited(The) | Other services | 1947 |
| Cartmel Contracting Limited | Construction | 2006 |
| Cartmel Steeplechases Limited | Arts & recreation | 1925 |
| Casa Romana Limited | Hospitality | 1999 |
| Castlesteads Farms Limited | Agriculture & fishing | 2006 |
| Caterite Food and Wineservice Limited | Wholesale & retail | 1998 |
| Cavendish Court Limited | Real estate | 1996 |
| Cedar Construction (Barrow) Ltd | Construction | 2001 |
| Central Cars & Couriers Limited | Transport & logistics | 2006 |
| Cfcc Ltd | Health & social care | 2006 |
| Chaldecott Properties Limited | Administrative & support | 1996 |
| Chalkside Farming Company Limited | Agriculture & fishing | 2006 |
| Charnley's Home and Garden Limited | Wholesale & retail | 2005 |
| Chase (Whitehaven) Limited | Hospitality | 2003 |
| Chatsworth Square Gardens Management Company Limited | Administrative & support | 2007 |
| Chilam Limited | Construction | 2007 |
| Chippy Bank Limited | Hospitality | 2003 |
| Chris Davidson Carpets Limited | Wholesale & retail | 1984 |
| Chris Norris Ltd | Professional & scientific | 2015 |
| Citzie Ltd | Information & communication | 2020 |
| CJS Car Sales Limited | Wholesale & retail | 2002 |
| Claremont (Arnside) Management Company Limited | Households | 2001 |
| Clay Flatts Autospares Limited | Water & waste | 2003 |
| Cleeve HOW (Windermere) Limited | Other services | 1985 |
| Clive Hasley Monumental Mason Ltd | Other services | 2004 |
| Co-Ordinate (Cumbria) Limited | Professional & scientific | 2007 |
| Coast to Coast (Fish & Chips) Limited | Hospitality | 2003 |
| Cobbler John Limited | Other services | 2003 |
| Cobco 791 Limited | Administrative & support | 2006 |
| Cockabundee Ltd | Education | 2002 |
| Cockermouth Antiques Limited | Wholesale & retail | 2002 |
| Colin Atkinson Transport Limited | Transport & logistics | 2003 |
| Columba Garage Limited | Wholesale & retail | 2006 |
| Comoco Ltd | Information & communication | 2025 |
| Coniston Ferry Services Limited | Transport & logistics | 2006 |
| Contour Projects Limited | Extraterritorial | 2007 |
| Coronation House (Dalton-In-Furness) Society Limited | Health & social care | 1969 |
| Corporate Care Furness Limited | Administrative & support | 2007 |
| County Mineral Services (Northern) Limited | | 1983 |
| Crake Management Limited | Real estate | 1986 |
| Cranstons Quality Butchers Limited | Manufacturing | 1928 |
| Croft Estate Management Co. Ltd(The) | Real estate | 1982 |
| Croftlands (Carlisle) Ltd | Financial services | 2007 |
| Crookdake Farms Limited | Agriculture & fishing | 2007 |
| Crookdyke Limited | Agriculture & fishing | 2007 |
| Crooks Motorcycles Limited | Wholesale & retail | 1979 |
| Crosby House Farm & Plant Hire Limited | Administrative & support | 2003 |
| Cross's Coffee Shop Limited | Wholesale & retail | 2003 |
| Crossfell House Farm Ltd | Agriculture & fishing | 2005 |
| Crosshall Developments Limited | Construction | 2005 |
| Crosthwaite Hotels (Westmorland) Limited | Hospitality | 1947 |
| Cumbria Autos Limited | Wholesale & retail | 2002 |
| Cumbria Business Group Ltd. | Real estate | 1988 |
| Cumbria Cerebral Palsy | Administrative & support | 2005 |
| Cumbria Design Scaffold Ltd | Construction | 2002 |
| Cumbria Electrical Services Limited | Construction | 2004 |
| Cumbria Law Centre | Professional & scientific | 1990 |
| Cumbria Scaffolding Company Limited | | 1973 |
| Cumbria Steelstock Limited | Transport & logistics | 1986 |
| Cumbria Strength and Conditioning Limited | Other services | 2018 |
| Cumbrian Inns Limited | Hospitality | 1982 |
| Cumbrian Rover Owners Club (N.W.) Limited | Arts & recreation | 1983 |
| Cumbrian Trailers Limited | | 1981 |
| CWH IT Services Limited | Information & communication | 2003 |
| D & a Kidd Limited | Wholesale & retail | 2007 |