| John Lord Safety Ltd | Education | 2020 |
| Jonjo Properties Ltd | Real estate | 2021 |
| JPC Properties (Cumbria) Limited | Real estate | 2023 |
| Kacuzi Limited | Other services | 2006 |
| Kane Assets Ltd | Construction | 2018 |
| KC Equines Ltd | Other services | 2006 |
| Kentsford Management Company Limited | Households | 1994 |
| KM Distribution Limited | Other services | 2006 |
| Knox Accountancy Limited | Professional & scientific | 2017 |
| Knoxphia Mechanical & Electrical Ltd | Construction | 2025 |
| Kraken Surveying and Mapping Limited | Professional & scientific | 2024 |
| La-Technical Ltd | Information & communication | 2024 |
| Lake District Drinks Limited | Wholesale & retail | 2019 |
| Lake District Gifting Limited | Wholesale & retail | 2021 |
| Lake District Horse Riding Holidays Ltd | Hospitality | 2019 |
| Lake Jewellery Limited | Wholesale & retail | 1998 |
| Lakeland BAA Limited | Wholesale & retail | 2022 |
| Lakeland Bakery Ltd | Hospitality | 2025 |
| Lakeland Caravan & Domestic Services Limited | Wholesale & retail | 2007 |
| Lakeland Optical Ltd | Health & social care | 2014 |
| Lakelander Design Ltd | Professional & scientific | 2021 |
| Lakelander Surveying Ltd | Professional & scientific | 2021 |
| Lakes and Dales Getaways Ltd | Hospitality | 2021 |
| Lakes Animal Physiotherapy Ltd | Other services | 2017 |
| Lakes Build Ltd | Construction | 2010 |
| Lakes Laser TAG Ltd | Arts & recreation | 2021 |
| Lakes Paws on the Run Ltd | Other services | 2025 |
| Lakes Payroll Services Ltd | Professional & scientific | 2025 |
| Lakes Property Services Limited | Administrative & support | 2023 |
| Lancaster GIN Limited | Wholesale & retail | 2020 |
| LBM Properties LLP | | 2008 |
| Lifetime Property Investing Ltd | Construction | 2025 |
| Limestone Landscapes (Cumbria) Limited | Administrative & support | 2006 |
| Lindale Developments (Westmorland) Limited | Construction | 1982 |
| Lingwood Park Limited | Construction | 2002 |
| Linsty Plant Hire Ltd | Administrative & support | 2016 |
| Little Library Education Ltd | Information & communication | 2025 |
| Livtradeuk Ltd | Wholesale & retail | 2024 |
| Lloyd Motors South Lakes Limited | Wholesale & retail | 1988 |
| Locarb Ltd | Wholesale & retail | 2020 |
| Loch Ness Huts Ltd | Hospitality | 2024 |
| Locks Express Ltd | Construction | 2009 |
| LOW Nabs Ltd | Energy | 2014 |
| Lozdoz Ltd | Households | 2025 |
| LYS Lakes Ltd | Other services | 2024 |
| M J Garnett Limited | Construction | 2015 |
| M.Blakemore Limited | Construction | 1931 |
| MAD Ruggers Ltd | Arts & recreation | 2025 |
| Magnus Albion Ltd | Information & communication | 2021 |
| Makeco Limited | Real estate | 2016 |
| Makeusvisible Limited | Information & communication | 2011 |
| Malltech Services Limited | Other services | 2006 |
| Martin Bailey Limited | Professional & scientific | 2004 |
| Material Adverse Change Limited | Professional & scientific | 2015 |
| Matt's Event Catering Ltd | Hospitality | 2023 |
| MC2 Accountants Ltd | Financial services | 2019 |
| Meathop Fell Forage Ltd | Wholesale & retail | 2024 |
| Mellowbrook Limited | Real estate | 1977 |
| Mere Mountains Limited | Education | 2018 |
| Meta Rent Limited | Real estate | 2025 |
| Midge Guard Limited | Agriculture & fishing | 2008 |
| Midlands Student Property Developments Limited | Construction | 2006 |
| Mini MOO Kids Limited | Health & social care | 2026 |
| Minoan Finance Ltd | Professional & scientific | 2026 |
| MMN Restaurant Ltd | Hospitality | 2020 |
| MPM (Bangor) Limited | Households | 2018 |
| MYE Group Limited | Professional & scientific | 2016 |
| Myrtle Court (Grange Over Sands) Management Company Limited | Real estate | 2008 |
| N & I Property Limited | Construction | 2018 |
| N D Builders Limited | Construction | 2016 |
| New Digital Talent Ltd | Other services | 2022 |
| Noisekillers Limited | Manufacturing | 2024 |
| Nordic Field & Sport Ltd | Wholesale & retail | 2025 |
| Northern Art Limited | Arts & recreation | 2010 |
| Northern Electrical Contractors (NEC) Limited | Construction | 2009 |
| Northern Produce Ltd | Wholesale & retail | 2022 |
| Northstar Education Consultancy Ltd | Education | 2021 |
| Nowicki Ltd | Professional & scientific | 2010 |
| NPL Surgical Services Limited | Health & social care | 2012 |
| NTN Windermere Limited | Professional & scientific | 1963 |
| Nutwood Manor Management Company Limited | Households | 2002 |
| Old Vicarage Homecare Limited | Health & social care | 2020 |
| Oliver and Wild Ltd | Wholesale & retail | 2024 |
| Ootheblue Ltd | Education | 2018 |
| OPTIMA365 Ltd | Information & communication | 2026 |
| Oreton 456 Management Company Limited | Households | 2016 |
| Oreton Properties (Grange-Over-Sands) Limited | Real estate | 2002 |
| OSO Blanca Ltd | Professional & scientific | 2024 |
| Oubas Knitwear Limited | Manufacturing | 2020 |
| P Hodgson Builders Limited | Construction | 2021 |
| P M Haygarth Ltd | Professional & scientific | 2024 |
| Palacio Consulting Limited | Information & communication | 2008 |
| Park's Tanks Ltd | Water & waste | 2022 |
| Parker & Mccarry Hospitality Ltd | Hospitality | 2020 |
| Parkland Machinery Limited | Administrative & support | 2004 |
| Pengarth (Grange) Management Company Limited | Households | 2012 |
| Peninsula Bespoke Joinery Ltd | Manufacturing | 2025 |
| Philip Donnison Occupational Psychology Limited | Professional & scientific | 2006 |
| Planet 66 Ltd | Professional & scientific | 2024 |
| Play Space Learning Ltd | Professional & scientific | 2024 |