| JJL Productions Ltd | Information & communication | 2025 |
| JLB Plasterers Ltd | Construction | 2023 |
| JLC Driving Tuition Limited | Education | 2024 |
| JLD Construction Services Limited | Construction | 2017 |
| JM Fusion Sports Ltd | Hospitality | 2025 |
| JM Hardy Holdings Ltd | Financial services | 2025 |
| JME Drinks Consultant and Coach Ltd | Administrative & support | 2022 |
| JML Rigging Services Limited | Information & communication | 2015 |
| JMS Roofing and Softwashing Limited | Construction | 2024 |
| JO and Cass (Holdings) Limited | Financial services | 2018 |
| JO and Cass Hair (Morecambe) Ltd | Other services | 2008 |
| JO and Cass Limited | Other services | 2014 |
| JOB Board Media Group Ltd | Administrative & support | 2018 |
| Jobes Bespoke Roofing & Building Solutions Ltd | Construction | 2025 |
| JOE Orwin Electrical Limited | Construction | 2026 |
| John + Co (Morecambe) Limited | Other services | 2010 |
| John and Mary Hanley Ltd | Real estate | 2024 |
| John Christian Electrical Contractors Limited | Construction | 2004 |
| John Heslop Financial Services Limited | Financial services | 2010 |
| John Hodgson Electrical Ltd | Construction | 2018 |
| Johnny's Entertainments (Tyneside) Limited | Arts & recreation | 1973 |
| Jonic Limited | Manufacturing | 2006 |
| Josey Lancaster Limited | Hospitality | 2014 |
| JP Bullion Ltd | Wholesale & retail | 2026 |
| JPW Property Care Ltd | Construction | 2025 |
| JQ Property's Ltd | Real estate | 2025 |
| JR Property Partners Ltd | Real estate | 2025 |
| JR Property Preperations Ltd | Real estate | 2025 |
| JRL & AKL Estates Limited | Real estate | 2024 |
| JRN Maintenance Services North West Limited | Administrative & support | 2018 |
| JS Property Rentals Limited | Real estate | 2017 |
| JSW Building and Plastering Ltd. | Construction | 2020 |
| JT Racing Products Ltd | Manufacturing | 2022 |
| JTW Training Limited | Construction | 2015 |
| Junction 34 Vehicle Sales Ltd | Wholesale & retail | 2023 |
| Just Artificial Group Ltd | Wholesale & retail | 2024 |
| Just Dents Limited | Wholesale & retail | 2002 |
| Just GOT Made Limited | Education | 2017 |
| Just VFX Media Ltd | Professional & scientific | 2023 |
| JW & Sons Roofing and Building Ltd | Construction | 2025 |
| Jwllrs CIC | Arts & recreation | 2024 |
| K & C Decorators Limited | Construction | 2012 |
| K CUT Limited | Professional & scientific | 2002 |
| K.R.S Rail Limited | Construction | 2016 |
| KA Metcalfe Building Ltd | Construction | 2024 |
| Kadiu Property Limited | Real estate | 2025 |
| Kane Brickwork Ltd | Construction | 2022 |
| Kanopi Contract Services Limited | Professional & scientific | 2019 |
| Kanopi Global Reach Limited | Professional & scientific | 2024 |
| Kara Jalmarit International Limited | Wholesale & retail | 1999 |
| Karen Wilkinson Holdings Limited | Financial services | 2018 |
| Karo Logistics Ltd | Transport & logistics | 2021 |
| Katan Properties Ltd | Other services | 2024 |
| Kate Knight Ltd | Administrative & support | 2017 |
| Katie Burke Limited | Hospitality | 2020 |
| Katie James Care Ltd | Health & social care | 2025 |
| Katy’S Care Limited | Health & social care | 2026 |
| Kavir Store Limited | Wholesale & retail | 2013 |
| Kazbor Services Limited | Professional & scientific | 2002 |
| Kebab O'Clock Ltd | Hospitality | 2025 |
| Kelevra Holdings Limited | Wholesale & retail | 2018 |
| Kendal Vintners Limited | Wholesale & retail | 2000 |
| Killin’It Kids Apparel Ltd | Manufacturing | 2021 |
| Kingsway Developments North West Ltd | Construction | 2019 |
| Kingsway Properties Northwest Ltd | Real estate | 2020 |
| Kipling Electrical Ltd | Construction | 2025 |
| Kirkby Lonsdale Coach Hire Limited | Transport & logistics | 2002 |
| Kirklands Entertainments Limited | Professional & scientific | 1996 |
| Kitchin Builders Limited | Construction | 2020 |
| KML Property Holdings Ltd | Real estate | 2026 |
| Knight Carpentry & Joinery Ltd | Construction | 2006 |
| Knight SPV Limited | Real estate | 2023 |
| Know HOW Investments Limited | Construction | 2024 |
| Kongsupplements Ltd | Other services | 2025 |
| KPN Stores Ltd | Wholesale & retail | 2019 |
| KRB Building Limited | Construction | 2025 |
| KRK Utilities Ltd | Construction | 2024 |
| KTM Devines Ltd | Hospitality | 2024 |
| KWB Projects Ltd | Construction | 2023 |
| KWP (NW) Services Ltd | Professional & scientific | 2012 |
| L & H Scaffolding Limited | Administrative & support | 2006 |
| L H Roofing Limited | Construction | 2022 |
| L J Richards Specialist Plastering Ltd | Construction | 2018 |
| L P H Holdings Limited | Hospitality | 2022 |
| L&R Hospitality Services Ltd | Hospitality | 2022 |
| LA REN (Holdings) Limited | Real estate | 2014 |
| Ladies That... Ltd | Arts & recreation | 2025 |
| Laister Court Residents Association (Morecambe) Limited | Households | 1981 |
| Lake District Storage Group Limited | Real estate | 2024 |
| Lake District Storage Limited | Real estate | 2024 |
| Lake District Tours Ltd | Administrative & support | 2009 |
| Lakedistrict Meats Limited | Manufacturing | 2026 |
| Lakeland Classic Cars Limited | Administrative & support | 2012 |
| Lakeland Property Sales & Lettings Limited | Real estate | 2012 |
| Lakeland View Management Company Limited | Households | 2026 |
| Lakes View Retreat 2 Ltd | Hospitality | 2025 |
| Lakes View Retreat Ltd | Hospitality | 2020 |
| Lamb Lettings Limited | Real estate | 2016 |
| Lanc Student Property Limited | Real estate | 2015 |
| Lancashire & Cumbria Mobile Tyres Limited | Wholesale & retail | 2024 |