| 00364401 Limited | Wholesale & retail | 1940 |
| 1 Driver Hire Limited | Transport & logistics | 2017 |
| 104 Brunswick Street Limited | Real estate | 2019 |
| 2 ELM Grove Limited | Hospitality | 2022 |
| 20 Alderbrook Road Residents Limited | Households | 2004 |
| 2026 Holdings Limited | Financial services | 2026 |
| 2030 Architects Limited | Professional & scientific | 2009 |
| 2DIRECTSERVICES Limited | Professional & scientific | 2020 |
| 3 Dads Walking Limited | Information & communication | 2021 |
| 3110 Limited | Administrative & support | 2010 |
| 3A Radiology Services Ltd | Health & social care | 2023 |
| 3CS Consulting Limited | Professional & scientific | 2019 |
| 41174 Limited | Other services | 2020 |
| 714 Insulation Limited | Manufacturing | 2026 |
| 79 Aromaexpress Ltd | Hospitality | 2025 |
| A & a Recycling Services Limited | Water & waste | 2001 |
| A & M Homes Limited | Construction | 2005 |
| A & N FOX Cottages Limited | Hospitality | 2024 |
| A & N FOX Inns Limited | Hospitality | 2024 |
| A & R Landscaping Limited | Administrative & support | 2016 |
| A and N PUB Co Ltd | Hospitality | 2024 |
| A C Cumbria Ltd | Construction | 2019 |
| A C Developments (Cumbria) Ltd | Construction | 2020 |
| A C Pamphilon Ltd | Professional & scientific | 2024 |
| A Chance for Life Limited | Health & social care | 2002 |
| A Davidson Limited | Construction | 2002 |
| A Goodwill Roofing and Building Maintenance Limited | Construction | 2010 |
| A J & D Chapelhow (Cliburn) Limited | Manufacturing | 2016 |
| A J & D Chapelhow (Holdings) Limited | Financial services | 2018 |
| A Little Place Ltd | Hospitality | 2023 |
| A Positive Direction Limited | Other services | 2016 |
| A Roper & Sons Limited | Construction | 1995 |
| A Verey Bookish Company Ltd | Wholesale & retail | 2021 |
| A W Jenkinson Investments | Professional & scientific | 2016 |
| A W Jenkinson Transport Limited | Transport & logistics | 2013 |
| A Wilderness Way Group Limited | Health & social care | 2020 |
| A Wilderness Way Holdings Limited | Financial services | 2016 |
| A Wilderness Way Limited | Health & social care | 2006 |
| A&A Turnbull Farming | Financial services | 2025 |
| A&C Stanley Property Investments Ltd | Real estate | 2026 |
| A. & C. Damp-Proofing Limited | Construction | 2003 |
| A. W. Jenkinson Business Services Ltd | Administrative & support | 2021 |
| A.J. Forster Limited | Agriculture & fishing | 1999 |
| A.R.K. Rental Company Limited | Hospitality | 1997 |
| A.W. Jenkinson (Forest Products) Limited | Professional & scientific | 1995 |
| A.W. Jenkinson Holdings Limited | Financial services | 2015 |
| A66 Caravan Storage Limited | Transport & logistics | 2018 |
| A66 Storage Limited | Real estate | 2005 |
| Above and Beyond Renewables Ltd | Construction | 2014 |
| Absolute-Eden Limited | Hospitality | 2020 |
| Accountancy Services (Richmond) Ltd | Professional & scientific | 2020 |
| Ace Fixings (Cumbria) Limited | Wholesale & retail | 2002 |
| Acer Associates Limited | Professional & scientific | 2019 |
| Acme - BN Ltd | Professional & scientific | 2025 |
| Acme Accountancy Ltd | Professional & scientific | 2025 |
| Acme UK Group Ltd | Professional & scientific | 2025 |
| Acorn Marketing (Cumbria) Limited | Professional & scientific | 2014 |
| Acre Property Investments Limited | Real estate | 2016 |
| Action-Ants Limited | Arts & recreation | 2010 |
| Active Medical Limited | Health & social care | 2002 |
| ACTIVE8EVENTS (UK) Limited | Administrative & support | 2001 |
| Adam Jackson Heritage Builders Ltd | Construction | 2023 |
| Addis Town Planning Ltd | Professional & scientific | 2018 |
| Advance Milking Limited | Professional & scientific | 2017 |
| Adventure Builds (Cumbria) Limited | Arts & recreation | 2024 |
| Adventure Golf Hub Limited | Arts & recreation | 2024 |
| Adventure Sport Services Ltd | Manufacturing | 2020 |
| Advolve UK Ltd | Professional & scientific | 2024 |
| Affinity Aesthetics Limited | Other services | 2010 |
| Affinity SEO Ltd | Professional & scientific | 2025 |
| After Hours MB Limited | Hospitality | 2023 |
| AG Intl Limited | Professional & scientific | 2009 |
| Agape Innovation Limited | Professional & scientific | 2010 |
| Agrifabrication Limited | Construction | 2011 |
| AH Equipment Ltd | Wholesale & retail | 2024 |
| AHL One Limited | Professional & scientific | 2024 |
| AHL Three Limited | Professional & scientific | 2024 |
| AHL Two Limited | Professional & scientific | 2024 |
| AI Clear Ltd | Professional & scientific | 2026 |
| Ainsworth Family Holdings Ltd | Financial services | 2024 |
| Aisgroundworks Ltd | Construction | 2020 |
| AJA ST Helens Limited | Health & social care | 2019 |
| AJR Plumbing and Heating Ltd | Construction | 2026 |
| Alan Causey Autosport Ltd | Wholesale & retail | 2006 |
| Alan Glendinning Haulage Ltd | Transport & logistics | 2004 |
| Alba Travel Limited | Transport & logistics | 2002 |
| Albert Court Penrith Cumbria Limited | Households | 1990 |
| ALL Tptm Ltd | Construction | 2025 |
| Allen (Park Foot) Limited | Hospitality | 1985 |
| Alpacaly Ever After C.I.C. | Agriculture & fishing | 2017 |
| Alpi Engineering Ltd | Manufacturing | 2016 |
| Alpine Business Management Limited | Professional & scientific | 2012 |
| Alpine Rando Limited | Arts & recreation | 2006 |
| Alsam Enterprises Ltd | Construction | 2026 |
| Alvis Health & Care Partnership Limited | Professional & scientific | 2023 |
| Amanda's Equine Dentistry Ltd | Professional & scientific | 2026 |
| AMD Civils Consultancy Limited | Construction | 2025 |
| Amident Limited | Health & social care | 2022 |
| Amit Paik Ltd | Health & social care | 2021 |
| AMJ Getaways Ltd | Administrative & support | 2020 |