| AMJ Lettings Limited | Hospitality | 2023 |
| AMJ Rentals Limited | Hospitality | 2023 |
| AMS ST Helens Limited | Health & social care | 2019 |
| Andrew Jordan Furniture Ltd | Manufacturing | 2006 |
| Andrew Scott Training Consultancy Ltd | Professional & scientific | 2011 |
| Andy Mills Plumbing Services Ltd | Construction | 2026 |
| Andy Wilson Racing Ltd | Arts & recreation | 2022 |
| Angel Lane Chippie Limited | Hospitality | 2013 |
| Anguilla Solutions Limited | Manufacturing | 2003 |
| Angus Black Limited | Health & social care | 2016 |
| Annie Mawson's Sunbeams Music Trust | Health & social care | 2006 |
| Anorka Ltd | Hospitality | 2021 |
| Antiquius Ltd | Education | 2024 |
| Anya the Artist Ltd | Information & communication | 2019 |
| AP Human Resources Ltd | Professional & scientific | 2023 |
| APB Bookkeeping Services Limited | Professional & scientific | 2014 |
| Apmw Holdings Limited | Financial services | 2017 |
| Appleby Riverside Property Limited | Extraterritorial | 2011 |
| Applerigg Management Company Ltd | Real estate | 2001 |
| Appropriate Solutions Web Development Limited | Information & communication | 2012 |
| ARB Clear Limited | Agriculture & fishing | 2020 |
| ARC Investigations Limited | Administrative & support | 2019 |
| Ardale Consulting Limited | Information & communication | 2026 |
| Ardronik Ltd | Financial services | 2025 |
| Ardwall Limited | Construction | 2011 |
| Armistead Holdings Limited | Extraterritorial | 2019 |
| Armstrong Building Contractors Ltd | Construction | 2014 |
| Armstrong Rural Ltd | Professional & scientific | 2024 |
| Arnison Heelis Trust Corporation Limited | Other services | 2021 |
| Art Making Difference Community Interest Company | Education | 2025 |
| Artform (U.K.) Limited | Wholesale & retail | 1998 |
| Asap Accountancy Services Ltd | Professional & scientific | 2002 |
| Ascend Events Ltd | Arts & recreation | 2016 |
| ASH Bennett Ecology Ltd | Professional & scientific | 2011 |
| Ashley Court (Penrith) Management Company Limited | Extraterritorial | 2001 |
| ASK Properties Blackpool Limited | Real estate | 2015 |
| Askham Motors Limited | Real estate | 2006 |
| Askins & Little Stonemasonry Specialists Limited | Construction | 2006 |
| Asolo Footwear UK Limited | Wholesale & retail | 2012 |
| Aspire Cheerleading Academy CIC | Education | 2024 |
| Assassin Goods Limited | Arts & recreation | 2017 |
| AST Signs Limited | Administrative & support | 2002 |
| AT Home With FW Ltd | Real estate | 2021 |
| Atanasov Catering Limited | Hospitality | 2018 |
| Atelier Hair Couture Limited | Other services | 2007 |
| Atfc 2026 Ltd | Arts & recreation | 2026 |
| Atkinson Building Contractors Limited | Construction | 2011 |
| Atkinson Homes Limited | Construction | 1989 |
| Atlantic Geomatics (UK) Limited | Professional & scientific | 2002 |
| Atlantic Veritas Limited | Professional & scientific | 2020 |
| Auction Mart House (Penrith) Limited | Real estate | 2026 |
| Audyssey Ltd | Manufacturing | 2023 |
| Auldby Farm Limited | Administrative & support | 2007 |
| Aura Commercial Limited | Professional & scientific | 2025 |
| Auterstone Farm Limited | Agriculture & fishing | 2025 |
| Avery Property Ltd | Hospitality | 2023 |
| AVN Medical Limited | Wholesale & retail | 2000 |
| Avon Construction (Carlisle) Ltd | Construction | 2022 |
| AWC Inspections Limited | Professional & scientific | 2007 |
| Awjfp | Agriculture & fishing | 2016 |
| Awjuk | Professional & scientific | 2017 |
| Awtua Limited | Extraterritorial | 2016 |
| Axis Health Club Ltd | Arts & recreation | 2026 |
| B & T Properties (Cumbria) Limited | Construction | 2022 |
| B a Holme Contractors Ltd | Administrative & support | 2006 |
| B Nichols Limited | Construction | 2013 |
| B&A Young Developments Limited | Construction | 2011 |
| B&Es Building & Engineering Services Association Limited | Extraterritorial | 2011 |
| B&Esa Limited | Other services | 1965 |
| B9 Capital Ltd | Professional & scientific | 2023 |
| Baby Eden Ltd | Education | 2023 |
| Baker Hydrographic Services Limited | Professional & scientific | 2023 |
| Balingour Limited | Agriculture & fishing | 1976 |
| Balls of Steel Rigging Limited | Information & communication | 2012 |
| Bare Health Holdings Ltd | Financial services | 2024 |
| Bare Health Ltd | Health & social care | 2022 |
| Bark & Bridle Limited | Agriculture & fishing | 2026 |
| Barker & Bland Limited | Manufacturing | 2012 |
| Barngates Brewery Limited | Extraterritorial | 1999 |
| Barrow Accommodation Limited | Hospitality | 2023 |
| Basecamp North Lakes Limited | Wholesale & retail | 2022 |
| Baseline Planning & Project Controls Ltd | Professional & scientific | 2021 |
| Bay Oral Health Limited | Health & social care | 2007 |
| Bayley & Swift Ltd | Construction | 2018 |
| BAZ Sky and Elvis Ltd | Financial services | 2024 |
| Bdvls Limited | Professional & scientific | 2018 |
| BEA RAY Garden Design Limited | Professional & scientific | 2011 |
| Beacon Computers (Cumbria) Limited | Information & communication | 2002 |
| Beacon Fire Protection Limited | Manufacturing | 2014 |
| Beacon Home Care Services Limited | Health & social care | 2002 |
| Beacon Homecare Carlisle Limited | Health & social care | 2014 |
| Beacon Social Economy Resourcing C.I.C. | Administrative & support | 2018 |
| Beacon Sports Ltd | Wholesale & retail | 2014 |
| Bean & Dunne Coffee Company Ltd | Wholesale & retail | 2024 |
| Beaty Fleet Services Limited | Wholesale & retail | 2021 |
| Beaty Group Limited | Financial services | 2026 |
| Beaumont Continuity Management Limited | Professional & scientific | 2012 |
| Beck & Flow Ltd | Arts & recreation | 2026 |
| Beckstones (Rheda Park) Limited | Construction | 2019 |
| Beep Doctors (Basics Cumbria) Ltd | Administrative & support | 2004 |