| Irthing Vale Caravan Park Ltd | Hospitality | 2018 |
| Irvings Management and Logistics Services Limited | Construction | 2015 |
| J M Corlett Limited | Professional & scientific | 2014 |
| Jaffffa Limited | Construction | 2014 |
| Jahan(Brampton) Co Ltd | Hospitality | 2025 |
| Jamie H Ltd | Wholesale & retail | 2021 |
| Jawc Limited | Real estate | 2021 |
| JAY by JAY Software Limited | Information & communication | 1990 |
| Jet's Castle Limited | Hospitality | 2024 |
| JHS Cumbria Ltd | Wholesale & retail | 2026 |
| Jimbars Limited | Manufacturing | 2015 |
| Jimmy's Massive Coffee Shop Ltd | Hospitality | 2025 |
| JMH FD Services Ltd | Administrative & support | 2017 |
| JPC Financial Management Ltd | Financial services | 2012 |
| Jprentalsandremovals Limited | Water & waste | 2024 |
| JW Mechanical & Plant Services Ltd | Manufacturing | 2019 |
| Jwgmi Ltd | Information & communication | 2025 |
| Kaprun | Financial services | 2022 |
| Karl Ingleton Ltd | Transport & logistics | 2025 |
| KCC Properties Ltd | Real estate | 2025 |
| Keystone North Ltd | Construction | 2016 |
| KIN Hill CIC | Agriculture & fishing | 2021 |
| Kingbridge Medical Services Limited | Health & social care | 2012 |
| Kirkby Stephen Produce Limited | Real estate | 2009 |
| Kodit Security (UK) Limited | Administrative & support | 2007 |
| KP Services and Leisure Limited | Real estate | 2025 |
| L Doree Ltd | Health & social care | 2020 |
| L.A.F Engineering Services Ltd | Construction | 2025 |
| Lawn Revive (Cumbria) Limited | Administrative & support | 2018 |
| LE Phonographe UK Ltd | Wholesale & retail | 2023 |
| Letheren Clark Limited | Professional & scientific | 2010 |
| Levity Media Ltd | Other services | 2017 |
| Lightfooting Limited | Real estate | 2009 |
| Liquid (Hair) Limited | Other services | 2006 |
| Living for Longer Limited | Professional & scientific | 2015 |
| Long House Management Limited | Households | 1988 |
| M & L Richardson & Sons Limited | Wholesale & retail | 2003 |
| M Feed Limited | Wholesale & retail | 2003 |
| M.B Services Ltd | Wholesale & retail | 2026 |
| Manor Gardens (Brampton) Management Company Limited | Households | 2008 |
| Manor Vale Freehold Limited | Households | 2022 |
| Mark Calvert Plant & HGV Operator Hire Limited | Manufacturing | 2012 |
| Mblem-Wear Limited | Wholesale & retail | 2006 |
| Media ZZZ Limited | Professional & scientific | 2021 |
| Michael Conway Limited | Construction | 2021 |
| Mike Howe (Joinery & Groundworks) Limited | Construction | 2007 |
| Minerva Total Teaching LLP | | 2019 |
| Missenden Gardens Residents Limited | Households | 1991 |
| MLG Developments Limited | Administrative & support | 2017 |
| Mountbatten Close Management Company Limited | Households | 1984 |
| Msrqgm Ltd | Real estate | 2023 |
| Must Travel Ltd | Administrative & support | 2025 |
| My Farm Meds Ltd | Extraterritorial | 2017 |
| My Pets Meds Ltd | Extraterritorial | 2017 |
| My Special Moment Ltd | Manufacturing | 2025 |
| MYNE63 Community Interest Company | Administrative & support | 2016 |
| Natural Sleep Innovations Limited | Wholesale & retail | 2004 |
| Natural Stone Direct (Cumbria) Limited | Mining & quarrying | 2009 |
| Nature England Limited | Administrative & support | 2018 |
| Navaura Hospitality Ltd | Hospitality | 2026 |
| Nicholson Sloan Consultancy Limited | Professional & scientific | 2020 |
| NJ Evans Contract & Commercial Services Ltd | Professional & scientific | 2017 |
| NJL Developments Limited | Households | 2025 |
| Nodematics Ltd | Information & communication | 2022 |
| North Scales Limited | Administrative & support | 2005 |
| Northern Carpets & Beds Brampton Limited | Wholesale & retail | 2026 |
| Northern Smiles Dental Group Limited | Health & social care | 2019 |
| Northwest K9 Hydrotherapy Ltd | Other services | 2017 |
| Npct ESG Global Consulting Ltd | Information & communication | 2025 |
| O'Reilly Hawes Limited | Professional & scientific | 2011 |
| OFF the Page Ideas Limited | Information & communication | 2012 |
| Old School Property and Construction Services Ltd | Construction | 2022 |
| Olemus Ltd | Extraterritorial | 2021 |
| Olemus-Hive Ltd | Extraterritorial | 2021 |
| Outset Publishing Limited | Information & communication | 1990 |
| Oxford International Consultants Ltd | Education | 2019 |
| P & L Ballantyne Limited | Transport & logistics | 2022 |
| P.Hayward & SON Limited | Real estate | 1951 |
| Page House Freehold Company Limited | Real estate | 2024 |
| Page House RTM Company Limited | Real estate | 2025 |
| PAJ Solutions Limited | Professional & scientific | 2022 |
| Park Court (Slough) Limited | Households | 1981 |
| Parke Appleby Ltd | Manufacturing | 2024 |
| Pattinson-Appleby Limited | Real estate | 2009 |
| PB Facilities Management Ltd | Administrative & support | 2018 |
| PBC Systems Engineering Ltd | Information & communication | 2022 |
| Pender Holdings | Financial services | 2024 |
| Philip J. Harrison Limited | Health & social care | 2008 |
| Pinotage Hospitality Limited | Hospitality | 2020 |
| PJG Global Enterprises Limited | Professional & scientific | 2011 |
| PKD Adventures Limited | Real estate | 2019 |
| PMG Corby | Financial services | 2024 |
| Pmgm Ltd | Hospitality | 2019 |
| Portnoy Holdings Ltd | Hospitality | 2019 |
| Qrcaddie Ltd | Arts & recreation | 2026 |
| Quantum Agri Nutrition Ltd | Agriculture & fishing | 2025 |
| R & a Slack (Cockley Bank) Limited | Agriculture & fishing | 2006 |
| R W H Apartments Otley Ltd | Households | 2023 |
| R&M Civils Limited | Construction | 2024 |
| RD Safety & Environmental Consulting Limited | Professional & scientific | 2016 |