| Moss Side House | Agriculture & fishing | 2008 |
| Mosslea Cumbria Ltd | Administrative & support | 2008 |
| MPS Fitness Ltd | Arts & recreation | 2024 |
| MRS Wilsons CBM Ltd | Real estate | 2023 |
| MRS Wilsons of Silloth Ltd | Hospitality | 2022 |
| Munchkin Catering Company Ltd | Hospitality | 2023 |
| MV Skintherapy UK Ltd | Wholesale & retail | 2022 |
| Mykel Holdings Ltd | Financial services | 2025 |
| Nature's Way (NE) Ltd | Other services | 2026 |
| Nessa Barnfather Ltd | Information & communication | 2012 |
| New Phase Cumbria Ltd | Construction | 2025 |
| Newcut Joinery and Construction Limited | Construction | 2024 |
| Newcut Properties Limited | Real estate | 2024 |
| Next Stock Ltd | Wholesale & retail | 2025 |
| Nichola Lindsey Merry Ltd | Extraterritorial | 2026 |
| Nicoll's Dental Care Ltd | Health & social care | 2003 |
| North Allerdale Development Trust Limited | Other services | 2008 |
| Northern Damp Proofing Solutions Ltd | Construction | 2022 |
| Northern Fells Rural Community Development Group | Transport & logistics | 2002 |
| Novus Tanks Ltd | Wholesale & retail | 2023 |
| Old Boys Toys Limited | Wholesale & retail | 2013 |
| Old Carlisle Stone Company | Construction | 2010 |
| Old Market Hall Ltd | Real estate | 2025 |
| ON One 2 Ltd | Financial services | 2023 |
| On-Off Group UK Ltd | Information & communication | 2024 |
| ORD Surveying Services Ltd. | Construction | 2016 |
| Osborne Services (Cumbria) Limited | Manufacturing | 2007 |
| Ostle Construction Limited | Construction | 2002 |
| Ostle Homes Ltd | Construction | 2021 |
| Otto Contracting Limited | Construction | 2025 |
| P & E Harrison Limited | Agriculture & fishing | 2006 |
| P & G Greening Limited | Financial services | 2025 |
| P & L Haile Limited | Wholesale & retail | 2012 |
| P Bradshaw Engineering Ltd | Professional & scientific | 2018 |
| P&W Inns Ltd | Hospitality | 2023 |
| Park House Farming Company Limited | Agriculture & fishing | 2002 |
| Pattinson Farming Company | Agriculture & fishing | 2012 |
| Paul EC Ltd | Manufacturing | 2016 |
| Paul Johnson Electrical Limited | Manufacturing | 2015 |
| Payroll Portal Limited | Professional & scientific | 2022 |
| PCM Commerical Ltd | Professional & scientific | 2021 |
| PCM Homes Ltd | Real estate | 2021 |
| Pearson Building Limited | Construction | 2005 |
| Penny PIN UP Ltd | Wholesale & retail | 2010 |
| Perkins Travel Limited | Extraterritorial | 2021 |
| Pet Accountant Limited | Professional & scientific | 2022 |
| PG Property Renovations Limited | Real estate | 2024 |
| Physiopilates Carlisle Ltd | Health & social care | 2005 |
| Pillar Cumbria Limited | Real estate | 2015 |
| Pink City Prints Limited | Other services | 2018 |
| Point Pumps UK Ltd | Manufacturing | 2022 |
| Port Carlisle Bowling Club Ltd | Arts & recreation | 2023 |
| Portia's Hair, Beauty and Barbers Ltd | Other services | 2024 |
| POW Heads Power Washing Limited | Administrative & support | 2009 |
| PPT GRC Norendal International Limited | Professional & scientific | 2025 |
| Precision HR Limited | Professional & scientific | 2024 |
| Pressure High Limited | Transport & logistics | 2005 |
| Preston Baby Boutique Ltd | Wholesale & retail | 2019 |
| Prime Asset Advisory Ltd | Professional & scientific | 2025 |
| Pro-Congruence Limited | Professional & scientific | 2005 |
| Proactive Accounting & Taxation Services Ltd | Professional & scientific | 2005 |
| Process Systems Integration Limited | Information & communication | 2016 |
| Procount Ltd | Professional & scientific | 2023 |
| Proficio Consulting Limited | Professional & scientific | 2006 |
| Project Wild Gambia Limited | Administrative & support | 2018 |
| Prospect Farm Limited | Administrative & support | 2005 |
| Protect OUR Periods CIC | Wholesale & retail | 2025 |
| PWS Systems Cumbria Limited | Administrative & support | 2018 |
| R & M Cleaning Ltd | Administrative & support | 2025 |
| R & M Cleaning Services Limited | Administrative & support | 2018 |
| R G & W Whitfield Limited | Agriculture & fishing | 2006 |
| R J Harrison & Sons Limited | Agriculture & fishing | 2008 |
| R Johnston Joinery Contractor Limited | Construction | 2009 |
| R S Clark Limited | Extraterritorial | 2023 |
| R Stewart Motors Ltd | Professional & scientific | 2022 |
| R Stewart Property's Limited | Real estate | 2024 |
| Ralle Health Limited | Health & social care | 2014 |
| RAW Companions & Co Ltd | Wholesale & retail | 2025 |
| Rays Shrimps Limited | Agriculture & fishing | 2000 |
| Rdavies Logistics Ltd | Transport & logistics | 2025 |
| Reays Coaches Limited | Transport & logistics | 2000 |
| Reays Contracts Ltd | Administrative & support | 2023 |
| Rebecca Carruthers Accountancy Ltd | Professional & scientific | 2016 |
| Red Dial Limited | Wholesale & retail | 2012 |
| Red Pike Education Ltd | Education | 2017 |
| Regina's Kitchen Ltd | Hospitality | 2025 |
| Retreat Homes & Lodges Limited | Manufacturing | 2004 |
| Rich Light Solutions Limited | Professional & scientific | 2011 |
| Richard Sewell Ltd | Construction | 2002 |
| Richard Skelton Contracting Limited | Agriculture & fishing | 2007 |
| Richardson Civils (North West) Ltd | Construction | 2011 |
| RMW Boiler Services Limited | Construction | 2003 |
| Robinson Car and Commercial Limited | Wholesale & retail | 2015 |
| Robinson Fork Trucks Limited | Manufacturing | 2003 |
| Rocco Global Ltd | Other services | 2024 |
| Rocketlist Ltd | Wholesale & retail | 2021 |
| Roland Hill (Holdings) Limited | Extraterritorial | 1995 |
| Roland Hill (Parsonby) Limited | Construction | 1971 |
| Roland Hill (Property Development) Limited | Administrative & support | 1995 |
| Roland Hill (Steelwork) Limited | Manufacturing | 1981 |