| 18 Eight Limited | Manufacturing | 2005 |
| 18 Lord Street West Management Company Limited | Real estate | 2009 |
| 247 Lifestyle Management Ltd | Professional & scientific | 2024 |
| 360 Films Ltd | Other services | 2019 |
| 5 Park Terrace Limited | Households | 2020 |
| A & C Robinson LLP | | 2016 |
| A Crawford Electrical (Ace) Ltd | Construction | 2018 |
| A D Boyes (Ireby) Limited | Transport & logistics | 1999 |
| A Ostle Ltd | Construction | 2011 |
| A&C Stanley Ltd | Health & social care | 2020 |
| A-Tech Design & Build Limited | Construction | 2011 |
| A.C.P. (Concrete) Limited | Manufacturing | 1988 |
| Abisuga Ltd | Transport & logistics | 2026 |
| Active Designs & Ideas Limited | Manufacturing | 2002 |
| Acts Theatre Limited | Arts & recreation | 2013 |
| Adam Tandoori Ltd | Hospitality | 2024 |
| ADM Driving Solutions Ltd | Wholesale & retail | 2021 |
| ADR Carriers Ltd | Transport & logistics | 2023 |
| After Aqua Limited | Construction | 2010 |
| Agriorganics Ltd | Extraterritorial | 2006 |
| Aikton House Farm | Agriculture & fishing | 2011 |
| Alexander Sterling (UK) Ltd | Real estate | 2013 |
| Alisdare M Bruce Ltd | Agriculture & fishing | 2015 |
| Allan G Riley Ltd | Agriculture & fishing | 2012 |
| AMC Scrap Metals Ltd | Wholesale & retail | 2020 |
| AMS Maintenance Cumbria Ltd | Extraterritorial | 2024 |
| Amy's Care (Cumbria) CIC | Health & social care | 2019 |
| Apidea Ltd | Professional & scientific | 2020 |
| APRES414 Ltd | Real estate | 2020 |
| Aregoat Ltd | Administrative & support | 2026 |
| Aremco Limited | Manufacturing | 2004 |
| Arlosh Ltd | Professional & scientific | 1989 |
| Armstrong & Mcavoy Limited | Construction | 2013 |
| Armstrong Mccaul Biological Consultants Ltd | Professional & scientific | 2024 |
| Arroyo Arms Ltd | Hospitality | 2021 |
| Arthur M. Limited | Information & communication | 2011 |
| Ashbrook Estates Limited | Real estate | 2016 |
| Aspatria Dreamscheme Limited | Health & social care | 2010 |
| Athepius Ltd | Health & social care | 2018 |
| Atlas Concrete Limited | Manufacturing | 1989 |
| Atrium Electrical Ltd | Professional & scientific | 2026 |
| Auto Vault Cumbria Ltd | Wholesale & retail | 2025 |
| Avitas Services Ltd | Construction | 2019 |
| Ballyhoo Estates Limited | Real estate | 2017 |
| Barnes Property and Lettings Ltd | Real estate | 2026 |
| Barton Phillips Limited | Financial services | 2012 |
| Batcars Limited | Manufacturing | 2025 |
| BB Electrical and Property Ltd | Construction | 2019 |
| Belle VUE Vets Limited | Professional & scientific | 2007 |
| Bells Mini-Market Limited | Wholesale & retail | 2003 |
| BEN Cross Vehicle Repairs Ltd | Wholesale & retail | 2011 |
| BEN Mumberson Limited | Other services | 2015 |
| BGH (North) Limited | Construction | 2019 |
| Big Fenton Limited | Real estate | 2025 |
| Birchall 16 Ltd | Professional & scientific | 2020 |
| Black Brow Abattoir Limited | Manufacturing | 2023 |
| Blackwood Service Station Limited | Wholesale & retail | 2003 |
| Blaithwaite Limited | Hospitality | 2013 |
| Bobby W Productions Ltd | Information & communication | 2023 |
| Bolt Staffing Solutions Limited | Administrative & support | 2021 |
| Boot Leisure Limited | Hospitality | 2000 |
| Border Electrical Limited | Construction | 2003 |
| Border Lime Construction Ltd | Construction | 2018 |
| Borg Woodwork Designs Ltd | Manufacturing | 2022 |
| Bothy Threads Ltd | Administrative & support | 2007 |
| Bowe Dairy Farming Company Limited | Agriculture & fishing | 2008 |
| Bowness Community Group | Other services | 2011 |
| Bowness Hall Farms | Administrative & support | 2009 |
| Branthwaite Cottages Limited | Hospitality | 2018 |
| Brayton Vehicle Solutions Ltd | Wholesale & retail | 2026 |
| Brian Foster Joinery Limited | Construction | 2010 |
| Brightgreen Lines Ltd | Professional & scientific | 2019 |
| Bromfield Farms Limited | Financial services | 2019 |
| Broomhill Farm (Aspatria) Limited | Administrative & support | 2009 |
| Brough Hill Properties Limited | Real estate | 2014 |
| BT Lettings Ltd | Real estate | 2021 |
| Buchanan Property Investors Ltd | Real estate | 2026 |
| Burns Generators Limited | Administrative & support | 2010 |
| C Bouch Ltd | Wholesale & retail | 2001 |
| Caldbeck Multi Purpose Tennis Court Association | Arts & recreation | 2018 |
| Caldbeck Shop Limited | Wholesale & retail | 2020 |
| Caldew Accountants Ltd | Professional & scientific | 2014 |
| Caldew Capital Limited | Professional & scientific | 2008 |
| Caldew Kitchens Limited | Manufacturing | 2002 |
| Caldew Travel Ltd | Transport & logistics | 2024 |
| Cameron Dickson Electrical Ltd | Construction | 2018 |
| Camp House Farms Ltd | Agriculture & fishing | 2011 |
| Caravan Salvage Solutions Ltd | Wholesale & retail | 2025 |
| Carl CAN Rope Access Ltd | Professional & scientific | 2011 |
| Carr House Communications Ltd | Professional & scientific | 2018 |
| Carrock Landscapes Limited | Administrative & support | 2010 |
| Carruthers Haulage Limited | Transport & logistics | 2026 |
| Cartmell Consulting Ltd | Professional & scientific | 2022 |
| Carvetii Coffee Limited | Manufacturing | 2011 |
| Castles Engineering Limited | Construction | 2002 |
| Causa Grange Limited | Households | 1991 |
| Cavalcade Developments Limited | Real estate | 2002 |
| CCL Secure (Holding) Limited | Professional & scientific | 2009 |
| CCL Secure Limited | Manufacturing | 2013 |
| CEB Property Developments Ltd | Real estate | 2024 |