| Neuroblaze Ltd | Wholesale & retail | 2026 |
| New Allotments Ltd | Real estate | 2026 |
| New Notes CIC | Professional & scientific | 2026 |
| Newclose Properties Limited | Real estate | 2002 |
| Newfoundland Lodges Limited | Manufacturing | 2004 |
| Nexus Network Group Limited | Professional & scientific | 2024 |
| Nicholson Outdoors Limited | Wholesale & retail | 2002 |
| Nicole Emily PR Ltd | Professional & scientific | 2025 |
| Night Airport Taxis Ltd | Transport & logistics | 2022 |
| Nightjar Sustainable Power Limited | Construction | 2014 |
| Nine SIX Zero Zero Nine One Limited | Manufacturing | 1969 |
| NJO Technology Ltd | Manufacturing | 1994 |
| NMG Property Ltd | Real estate | 2020 |
| NO 16 the Salon Limited | Other services | 2005 |
| No-Hands Rest Ltd | Hospitality | 2023 |
| Nomad Active Ltd | Administrative & support | 2019 |
| Nook Bar Staveley Ltd | Hospitality | 2026 |
| Normay Holding Limited | Financial services | 2026 |
| North Grange Glass Limited | Real estate | 2003 |
| North Road Properties Limited | Real estate | 2026 |
| North West Autos Ltd | Wholesale & retail | 2024 |
| North West JC Properties Ltd | Real estate | 2020 |
| North West Softwash Ltd | Administrative & support | 2021 |
| Northedge Commercial Limited | Professional & scientific | 2026 |
| Northern Wine Bars Ltd | Hospitality | 2023 |
| Northern Wine Ltd | Manufacturing | 2023 |
| Northvest Ltd | Construction | 2026 |
| Noticeboard Company Cumbria Ltd | Wholesale & retail | 2020 |
| Noticeboard Workshop Ltd | Wholesale & retail | 2023 |
| Notting Hill Editions Limited | Information & communication | 2006 |
| Nouvelle Aquitaine Macons Ltd | Construction | 2023 |
| Nowell Property Limited | Real estate | 2018 |
| Ntis Ltd. | Financial services | 2008 |
| Nugreen Ltd | Professional & scientific | 2020 |
| Nurture Tourism Limited | Professional & scientific | 2010 |
| Nutwells Buckland Ltd | Hospitality | 2025 |
| O'Neil Associates Limited | Professional & scientific | 2005 |
| Oakbrook RE Limited | Real estate | 2012 |
| Oakmere Estates (South) Limited | Real estate | 2018 |
| Oakmere Homes (Kendal) Limited | Construction | 2015 |
| Oakmere Homes (Longtown) Ltd | Construction | 2007 |
| Oakmere Homes (Northwest) Ltd | Construction | 2003 |
| Oceans 12 Limited | Wholesale & retail | 2012 |
| Oculus Subsea Ltd | Other services | 2014 |
| Odana Narrowboats Ltd | Hospitality | 2018 |
| ODD Fellows Hall Management Company Limited | Real estate | 2006 |
| Oilfield Integrity Engineering Ltd | Professional & scientific | 2020 |
| Old Earth Estates Limited | Households | 2025 |
| Old Stamp House Restaurant Limited | Hospitality | 2016 |
| Oliviageorgeproperties Ltd | Real estate | 2024 |
| Omega 1 Developments Ltd | Construction | 2025 |
| Omega Products Group Limited | Wholesale & retail | 2016 |
| Omega R Ltd | Hospitality | 2022 |
| One Penny Ltd | Administrative & support | 2021 |
| One Vision Uniformed Services CIC | Health & social care | 2022 |
| Onir Limited | Real estate | 2023 |
| Onyx Fire and Security Ltd | Administrative & support | 2008 |
| Onyx Investment Holdings Limited | Financial services | 2020 |
| Orange Capital Ventures Ltd | Real estate | 2014 |
| Orchardton Hospitality Limited | Hospitality | 2019 |
| Ormrod Signs Limited | Construction | 2002 |
| Orton Properties Development Limited | Construction | 2024 |
| Osprey Green Power Limited | Professional & scientific | 2014 |
| Otway's Otters Limited | Education | 2014 |
| Ourea Events Holdings Limited | Extraterritorial | 2021 |
| Outdoor 7 Ltd | Wholesale & retail | 2017 |
| Outrun Sailing Limited | Transport & logistics | 2005 |
| Overbeck Limited | Real estate | 1999 |
| Ovum Limited | Manufacturing | 2020 |
| P J Brunskill Services Limited | Construction | 2014 |
| P Lishman Limited | Professional & scientific | 2002 |
| P V Dobson Limited | Manufacturing | 2021 |
| P W Services (Cumbria) Limited | Administrative & support | 2013 |
| P Wright (Electrical Contractor) Limited | Construction | 2002 |
| PAC Innovations Limited | Professional & scientific | 2022 |
| Paddocks Pods Limited | Hospitality | 2020 |
| Panem Limited | Wholesale & retail | 2007 |
| Paper Foundation | Education | 2016 |
| Pappy's Taco Bar Limited | Hospitality | 2022 |
| Pappy's Texas Barbeque Ltd. | Manufacturing | 2014 |
| Parker & Stephens Holdings Ltd | Real estate | 2022 |
| Parkin & Jackson Ltd | Manufacturing | 2011 |
| Parkin Finance Limited | Professional & scientific | 2021 |
| Parr Court Management Company Limited | Real estate | 2006 |
| Party Pact CIC | Education | 2025 |
| Paul Bennett Fine Artist Limited | Arts & recreation | 2014 |
| Paul Hudson Joinery Limited | Construction | 2016 |
| Paul Shepherd Joinery & Building Ltd | Construction | 2026 |
| PE Accountancy Services Limited | Professional & scientific | 2021 |
| Peak Timber Limited | Wholesale & retail | 2021 |
| Pearl Takeaway 168 Limited | Hospitality | 2012 |
| Peill & Company Limited | Administrative & support | 2002 |
| Penguin Family Ltd | Wholesale & retail | 2026 |
| Pennington's Tea & Coffee Ltd | Wholesale & retail | 2018 |
| Penrith Pumas WRC CIC | Arts & recreation | 2020 |
| Penwork (Leeds) Limited | Hospitality | 1964 |
| PEP Energy Limited | Administrative & support | 2016 |
| Performance Inspired Limited | Information & communication | 2010 |
| Pete Bland Sports Limited | Wholesale & retail | 2002 |
| Peter George Banks Limited | Wholesale & retail | 2009 |