| Beth Pell Health Limited | Health & social care | 2017 |
| Better Business Centre Limited(The) | Professional & scientific | 1984 |
| Bideford Joinery Limited | Manufacturing | 2003 |
| Bideford Metals Limited | | 1971 |
| Bigfield Properties Limited | | 1962 |
| Bigmike Productions Limited | Professional & scientific | 2023 |
| Bill Jago Dental Laboratory Ltd | Health & social care | 2007 |
| Bisify Ltd | Other services | 2023 |
| Bisphere Ltd | Other services | 2023 |
| Bithrey (Developments) Limited | Extraterritorial | 1981 |
| BK Moving and Storage Limited | Transport & logistics | 2005 |
| BKT Holdings Ltd | Financial services | 2024 |
| Black Dog Free Range Eggs Limited | Wholesale & retail | 2024 |
| Blackdice Healthcare Limited | Other services | 2014 |
| Blackdown Education Partnership | Education | 2010 |
| Blacksnow Web Design Ltd | Information & communication | 2008 |
| Blaster Master Limited | Administrative & support | 2006 |
| Blazeshift Ltd | Other services | 2024 |
| Blooloop Employee Benefits Limited | Other services | 2024 |
| Blooloop Group Limited | Financial services | 2024 |
| Blue Groove Limited | Hospitality | 2003 |
| Blue Ripple Limited | Information & communication | 2001 |
| Bluestone Technology Limited | Manufacturing | 2002 |
| Bocabrook Limited | | 1986 |
| Bond Joinery Limited | Manufacturing | 2007 |
| BOO Contracting Ltd | Manufacturing | 2018 |
| Boorman Construction & Landscaping Limited | Construction | 2019 |
| Borac Ltd | Other services | 2023 |
| Borough Valley Limited | Agriculture & fishing | 2002 |
| Bowring Park Management Company Limited | Households | 2003 |
| Braddicks Furnishers (Bideford) Limited | Wholesale & retail | 1947 |
| Braddicks Furnishers (Seafield) Limited | Hospitality | 1966 |
| Bradleys Estate Agents (1999) Limited | Real estate | 1998 |
| Bradleys Estate Agents Ltd. | Real estate | 1998 |
| Bradleys Financial Management Limited | Administrative & support | 1996 |
| Bradleys Group Ltd. | Other services | 1993 |
| Bradleys Surveyors (Cornwall) Limited | Professional & scientific | 2000 |
| Bradleys Surveyors Limited | Other services | 1996 |
| Brandan Computer Solutions Limited | Information & communication | 2005 |
| Brantwood Homes Limited | Wholesale & retail | 1998 |
| Braunton IFA Ltd | Administrative & support | 1999 |
| Braunton Park Homes (Devon) Limited | Real estate | 1997 |
| Bravefigure Limited | Real estate | 1993 |
| Breeze Properties Limited | Real estate | 2003 |
| Brewer Harding & Rowe (Nominees) Limited | Professional & scientific | 1996 |
| Bridge Commercials Holdings Limited | Financial services | 2019 |
| Brighouse Consulting Ltd | Professional & scientific | 2021 |
| Brightkite Limited | Information & communication | 2003 |
| British Maid Limited | Wholesale & retail | 1994 |
| Brodie Services Limited | Construction | 1986 |
| Brookridge Timber Limited | Manufacturing | 1981 |
| Brookwell (Plymouth) Limited | Wholesale & retail | 1992 |
| Brookwell Supplies Limited | Wholesale & retail | 1981 |
| Brookwells Limited | Professional & scientific | 1990 |
| Brunels Keep Management Company Limited | Households | 2003 |
| BRW Contracting Ltd | Transport & logistics | 2018 |
| Bryan Helley Limited | Construction | 2003 |
| Buckfast Butterflies Limited | Arts & recreation | 1983 |
| Buckleigh Laundry,Limited | Administrative & support | 1943 |
| Bumblebees Day Nursery (Plymouth) Limited | Administrative & support | 2006 |
| Burnham Nurseries Limited | Agriculture & fishing | 1951 |
| Burrington Grain Store Limited | Agriculture & fishing | 1979 |
| Burrough Lawn Residents Association Limited | Households | 1976 |
| Bush Construction Limited | Construction | 2002 |
| Business Logic Corporation Limited | Information & communication | 2001 |
| Business Strategy Group Ltd | Extraterritorial | 2023 |
| Business Works Limited | Professional & scientific | 2004 |
| Butterford Land Company Limited | Real estate | 1998 |
| BW Converting Ltd | Manufacturing | 1962 |
| Bystock Management (Exmouth) Limited | Households | 2000 |
| BZH5 Limited | Information & communication | 2000 |
| C & H Geatches Ltd. | Manufacturing | 2003 |
| C & L Mail Order Ltd | Wholesale & retail | 2007 |
| C T Property Developments Ltd | Hospitality | 2005 |
| C.A.P. Office Services Ltd | Professional & scientific | 2006 |
| C.C. Haulage and Sons Limited | Water & waste | 2002 |
| C.M.Cadman Services Ltd | Health & social care | 2018 |
| Caberfeidh Homes Limited | Construction | 2000 |
| Cabinet Supplies (Plymouth) Limited (the) | Wholesale & retail | 1960 |
| Caine Limited | Wholesale & retail | 2004 |
| CAM (the Wharf) Ltd | Arts & recreation | 1996 |
| CAM (Trading) Ltd. | Hospitality | 1995 |
| Camphill Devon Community Limited | Health & social care | 1979 |
| Cap'N Jaspers Ltd | Hospitality | 2003 |
| Capital Taxis Exeter Limited | Transport & logistics | 2005 |
| Caroline Place Ltd | Administrative & support | 2000 |
| Carpenter Construction (South West) Limited | Wholesale & retail | 2007 |
| Carson's Properties Limited | Hospitality | 2002 |
| Carter Plant Hire Limited | Construction | 2002 |
| Castlegate North West Limited | Real estate | 1998 |
| Cat's EYE Creative Services Ltd | Information & communication | 2004 |
| Catalka Ltd | Other services | 2023 |
| Catalyst Homes Limited | Construction | 2002 |
| CBK Merchants (UK) Limited | Transport & logistics | 2007 |
| CCA (South West) Limited | Wholesale & retail | 1993 |
| CCG Properties (Devon) Limited | Real estate | 2024 |
| Cdarwin Ltd | Construction | 2006 |
| Central Link Couriers Ltd | Transport & logistics | 2005 |
| Centrax Engineering Limited | Real estate | 1975 |
| Centrax GAS Turbines Limited | Extraterritorial | 2006 |